v4.19.13 snapshot.
diff --git a/drivers/pnp/Kconfig b/drivers/pnp/Kconfig
new file mode 100644
index 0000000..2a37b3f
--- /dev/null
+++ b/drivers/pnp/Kconfig
@@ -0,0 +1,47 @@
+#
+# Plug and Play configuration
+#
+
+menuconfig PNP
+ bool "Plug and Play support"
+ depends on HAS_IOMEM
+ depends on ISA || ACPI
+ ---help---
+ Plug and Play (PnP) is a standard for peripherals which allows those
+ peripherals to be configured by software, e.g. assign IRQ's or other
+ parameters. No jumpers on the cards are needed, instead the values
+ are provided to the cards from the BIOS, from the operating system,
+ or using a user-space utility.
+
+ Say Y here if you would like Linux to configure your Plug and Play
+ devices. You should then also say Y to all of the protocols below.
+ Alternatively, you can say N here and configure your PnP devices
+ using user space utilities such as the isapnptools package.
+
+ If unsure, say Y.
+
+config PNP_DEBUG_MESSAGES
+ default y
+ bool "PNP debugging messages"
+ depends on PNP
+ help
+ Say Y here if you want the PNP layer to be able to produce debugging
+ messages if needed. The messages can be enabled at boot-time with
+ the pnp.debug kernel parameter.
+
+ This option allows you to save a bit of space if you do not want
+ the messages to even be built into the kernel.
+
+ If you have any doubts about this, say Y here.
+
+if PNP
+
+comment "Protocols"
+
+source "drivers/pnp/isapnp/Kconfig"
+
+source "drivers/pnp/pnpbios/Kconfig"
+
+source "drivers/pnp/pnpacpi/Kconfig"
+
+endif # PNP
diff --git a/drivers/pnp/Makefile b/drivers/pnp/Makefile
new file mode 100644
index 0000000..71d532f
--- /dev/null
+++ b/drivers/pnp/Makefile
@@ -0,0 +1,15 @@
+# SPDX-License-Identifier: GPL-2.0
+#
+# Makefile for the Linux Plug-and-Play Support.
+#
+
+obj-y := pnp.o
+
+pnp-y := core.o card.o driver.o resource.o manager.o support.o interface.o quirks.o
+
+obj-$(CONFIG_PNPACPI) += pnpacpi/
+obj-$(CONFIG_PNPBIOS) += pnpbios/
+obj-$(CONFIG_ISAPNP) += isapnp/
+
+# pnp_system_init goes after pnpacpi/pnpbios init
+pnp-y += system.o
diff --git a/drivers/pnp/base.h b/drivers/pnp/base.h
new file mode 100644
index 0000000..cdcfa39
--- /dev/null
+++ b/drivers/pnp/base.h
@@ -0,0 +1,187 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * Copyright (C) 2008 Hewlett-Packard Development Company, L.P.
+ * Bjorn Helgaas <bjorn.helgaas@hp.com>
+ */
+
+extern struct mutex pnp_lock;
+extern const struct attribute_group *pnp_dev_groups[];
+void *pnp_alloc(long size);
+
+int pnp_register_protocol(struct pnp_protocol *protocol);
+void pnp_unregister_protocol(struct pnp_protocol *protocol);
+
+#define PNP_EISA_ID_MASK 0x7fffffff
+void pnp_eisa_id_to_string(u32 id, char *str);
+struct pnp_dev *pnp_alloc_dev(struct pnp_protocol *, int id,
+ const char *pnpid);
+struct pnp_card *pnp_alloc_card(struct pnp_protocol *, int id, char *pnpid);
+
+int pnp_add_device(struct pnp_dev *dev);
+struct pnp_id *pnp_add_id(struct pnp_dev *dev, const char *id);
+
+int pnp_add_card(struct pnp_card *card);
+void pnp_remove_card(struct pnp_card *card);
+int pnp_add_card_device(struct pnp_card *card, struct pnp_dev *dev);
+void pnp_remove_card_device(struct pnp_dev *dev);
+
+struct pnp_port {
+ resource_size_t min; /* min base number */
+ resource_size_t max; /* max base number */
+ resource_size_t align; /* align boundary */
+ resource_size_t size; /* size of range */
+ unsigned char flags; /* port flags */
+};
+
+#define PNP_IRQ_NR 256
+typedef struct { DECLARE_BITMAP(bits, PNP_IRQ_NR); } pnp_irq_mask_t;
+
+struct pnp_irq {
+ pnp_irq_mask_t map; /* bitmap for IRQ lines */
+ unsigned char flags; /* IRQ flags */
+};
+
+struct pnp_dma {
+ unsigned char map; /* bitmask for DMA channels */
+ unsigned char flags; /* DMA flags */
+};
+
+struct pnp_mem {
+ resource_size_t min; /* min base number */
+ resource_size_t max; /* max base number */
+ resource_size_t align; /* align boundary */
+ resource_size_t size; /* size of range */
+ unsigned char flags; /* memory flags */
+};
+
+#define PNP_OPTION_DEPENDENT 0x80000000
+#define PNP_OPTION_SET_MASK 0xffff
+#define PNP_OPTION_SET_SHIFT 12
+#define PNP_OPTION_PRIORITY_MASK 0xfff
+#define PNP_OPTION_PRIORITY_SHIFT 0
+
+#define PNP_RES_PRIORITY_PREFERRED 0
+#define PNP_RES_PRIORITY_ACCEPTABLE 1
+#define PNP_RES_PRIORITY_FUNCTIONAL 2
+#define PNP_RES_PRIORITY_INVALID PNP_OPTION_PRIORITY_MASK
+
+struct pnp_option {
+ struct list_head list;
+ unsigned int flags; /* independent/dependent, set, priority */
+
+ unsigned long type; /* IORESOURCE_{IO,MEM,IRQ,DMA} */
+ union {
+ struct pnp_port port;
+ struct pnp_irq irq;
+ struct pnp_dma dma;
+ struct pnp_mem mem;
+ } u;
+};
+
+int pnp_register_irq_resource(struct pnp_dev *dev, unsigned int option_flags,
+ pnp_irq_mask_t *map, unsigned char flags);
+int pnp_register_dma_resource(struct pnp_dev *dev, unsigned int option_flags,
+ unsigned char map, unsigned char flags);
+int pnp_register_port_resource(struct pnp_dev *dev, unsigned int option_flags,
+ resource_size_t min, resource_size_t max,
+ resource_size_t align, resource_size_t size,
+ unsigned char flags);
+int pnp_register_mem_resource(struct pnp_dev *dev, unsigned int option_flags,
+ resource_size_t min, resource_size_t max,
+ resource_size_t align, resource_size_t size,
+ unsigned char flags);
+
+static inline int pnp_option_is_dependent(struct pnp_option *option)
+{
+ return option->flags & PNP_OPTION_DEPENDENT ? 1 : 0;
+}
+
+static inline unsigned int pnp_option_set(struct pnp_option *option)
+{
+ return (option->flags >> PNP_OPTION_SET_SHIFT) & PNP_OPTION_SET_MASK;
+}
+
+static inline unsigned int pnp_option_priority(struct pnp_option *option)
+{
+ return (option->flags >> PNP_OPTION_PRIORITY_SHIFT) &
+ PNP_OPTION_PRIORITY_MASK;
+}
+
+static inline unsigned int pnp_new_dependent_set(struct pnp_dev *dev,
+ int priority)
+{
+ unsigned int flags;
+
+ if (priority > PNP_RES_PRIORITY_FUNCTIONAL) {
+ dev_warn(&dev->dev, "invalid dependent option priority %d "
+ "clipped to %d", priority,
+ PNP_RES_PRIORITY_INVALID);
+ priority = PNP_RES_PRIORITY_INVALID;
+ }
+
+ flags = PNP_OPTION_DEPENDENT |
+ ((dev->num_dependent_sets & PNP_OPTION_SET_MASK) <<
+ PNP_OPTION_SET_SHIFT) |
+ ((priority & PNP_OPTION_PRIORITY_MASK) <<
+ PNP_OPTION_PRIORITY_SHIFT);
+
+ dev->num_dependent_sets++;
+
+ return flags;
+}
+
+char *pnp_option_priority_name(struct pnp_option *option);
+void dbg_pnp_show_option(struct pnp_dev *dev, struct pnp_option *option);
+
+void pnp_init_resources(struct pnp_dev *dev);
+
+void pnp_fixup_device(struct pnp_dev *dev);
+void pnp_free_options(struct pnp_dev *dev);
+int __pnp_add_device(struct pnp_dev *dev);
+void __pnp_remove_device(struct pnp_dev *dev);
+
+int pnp_check_port(struct pnp_dev *dev, struct resource *res);
+int pnp_check_mem(struct pnp_dev *dev, struct resource *res);
+int pnp_check_irq(struct pnp_dev *dev, struct resource *res);
+#ifdef CONFIG_ISA_DMA_API
+int pnp_check_dma(struct pnp_dev *dev, struct resource *res);
+#endif
+
+char *pnp_resource_type_name(struct resource *res);
+void dbg_pnp_show_resources(struct pnp_dev *dev, char *desc);
+
+void pnp_free_resources(struct pnp_dev *dev);
+unsigned long pnp_resource_type(struct resource *res);
+
+struct pnp_resource {
+ struct list_head list;
+ struct resource res;
+};
+
+void pnp_free_resource(struct pnp_resource *pnp_res);
+
+struct pnp_resource *pnp_add_resource(struct pnp_dev *dev,
+ struct resource *res);
+struct pnp_resource *pnp_add_irq_resource(struct pnp_dev *dev, int irq,
+ int flags);
+struct pnp_resource *pnp_add_dma_resource(struct pnp_dev *dev, int dma,
+ int flags);
+struct pnp_resource *pnp_add_io_resource(struct pnp_dev *dev,
+ resource_size_t start,
+ resource_size_t end, int flags);
+struct pnp_resource *pnp_add_mem_resource(struct pnp_dev *dev,
+ resource_size_t start,
+ resource_size_t end, int flags);
+struct pnp_resource *pnp_add_bus_resource(struct pnp_dev *dev,
+ resource_size_t start,
+ resource_size_t end);
+
+extern int pnp_debug;
+
+#if defined(CONFIG_PNP_DEBUG_MESSAGES)
+#define pnp_dbg(dev, format, arg...) \
+ ({ if (pnp_debug) dev_printk(KERN_DEBUG, dev, format, ## arg); 0; })
+#else
+#define pnp_dbg(dev, format, arg...) \
+ ({ if (0) dev_printk(KERN_DEBUG, dev, format, ## arg); 0; })
+#endif
diff --git a/drivers/pnp/card.c b/drivers/pnp/card.c
new file mode 100644
index 0000000..c2464ee
--- /dev/null
+++ b/drivers/pnp/card.c
@@ -0,0 +1,458 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * card.c - contains functions for managing groups of PnP devices
+ *
+ * Copyright 2002 Adam Belay <ambx1@neo.rr.com>
+ */
+
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/ctype.h>
+#include <linux/slab.h>
+#include <linux/pnp.h>
+#include <linux/dma-mapping.h>
+#include "base.h"
+
+LIST_HEAD(pnp_cards);
+static LIST_HEAD(pnp_card_drivers);
+
+static const struct pnp_card_device_id *match_card(struct pnp_card_driver *drv,
+ struct pnp_card *card)
+{
+ const struct pnp_card_device_id *drv_id = drv->id_table;
+
+ while (*drv_id->id) {
+ if (compare_pnp_id(card->id, drv_id->id)) {
+ int i = 0;
+
+ for (;;) {
+ int found;
+ struct pnp_dev *dev;
+
+ if (i == PNP_MAX_DEVICES ||
+ !*drv_id->devs[i].id)
+ return drv_id;
+ found = 0;
+ card_for_each_dev(card, dev) {
+ if (compare_pnp_id(dev->id,
+ drv_id->devs[i].id)) {
+ found = 1;
+ break;
+ }
+ }
+ if (!found)
+ break;
+ i++;
+ }
+ }
+ drv_id++;
+ }
+ return NULL;
+}
+
+static void card_remove(struct pnp_dev *dev)
+{
+ dev->card_link = NULL;
+}
+
+static void card_remove_first(struct pnp_dev *dev)
+{
+ struct pnp_card_driver *drv = to_pnp_card_driver(dev->driver);
+
+ if (!dev->card || !drv)
+ return;
+ if (drv->remove)
+ drv->remove(dev->card_link);
+ drv->link.remove = &card_remove;
+ kfree(dev->card_link);
+ card_remove(dev);
+}
+
+static int card_probe(struct pnp_card *card, struct pnp_card_driver *drv)
+{
+ const struct pnp_card_device_id *id;
+ struct pnp_card_link *clink;
+ struct pnp_dev *dev;
+
+ if (!drv->probe)
+ return 0;
+ id = match_card(drv, card);
+ if (!id)
+ return 0;
+
+ clink = pnp_alloc(sizeof(*clink));
+ if (!clink)
+ return 0;
+ clink->card = card;
+ clink->driver = drv;
+ clink->pm_state = PMSG_ON;
+
+ if (drv->probe(clink, id) >= 0)
+ return 1;
+
+ /* Recovery */
+ card_for_each_dev(card, dev) {
+ if (dev->card_link == clink)
+ pnp_release_card_device(dev);
+ }
+ kfree(clink);
+ return 0;
+}
+
+/**
+ * pnp_add_card_id - adds an EISA id to the specified card
+ * @id: pointer to a pnp_id structure
+ * @card: pointer to the desired card
+ */
+static struct pnp_id *pnp_add_card_id(struct pnp_card *card, char *id)
+{
+ struct pnp_id *dev_id, *ptr;
+
+ dev_id = kzalloc(sizeof(struct pnp_id), GFP_KERNEL);
+ if (!dev_id)
+ return NULL;
+
+ dev_id->id[0] = id[0];
+ dev_id->id[1] = id[1];
+ dev_id->id[2] = id[2];
+ dev_id->id[3] = tolower(id[3]);
+ dev_id->id[4] = tolower(id[4]);
+ dev_id->id[5] = tolower(id[5]);
+ dev_id->id[6] = tolower(id[6]);
+ dev_id->id[7] = '\0';
+
+ dev_id->next = NULL;
+ ptr = card->id;
+ while (ptr && ptr->next)
+ ptr = ptr->next;
+ if (ptr)
+ ptr->next = dev_id;
+ else
+ card->id = dev_id;
+
+ return dev_id;
+}
+
+static void pnp_free_card_ids(struct pnp_card *card)
+{
+ struct pnp_id *id;
+ struct pnp_id *next;
+
+ id = card->id;
+ while (id) {
+ next = id->next;
+ kfree(id);
+ id = next;
+ }
+}
+
+static void pnp_release_card(struct device *dmdev)
+{
+ struct pnp_card *card = to_pnp_card(dmdev);
+
+ pnp_free_card_ids(card);
+ kfree(card);
+}
+
+struct pnp_card *pnp_alloc_card(struct pnp_protocol *protocol, int id, char *pnpid)
+{
+ struct pnp_card *card;
+ struct pnp_id *dev_id;
+
+ card = kzalloc(sizeof(struct pnp_card), GFP_KERNEL);
+ if (!card)
+ return NULL;
+
+ card->protocol = protocol;
+ card->number = id;
+
+ card->dev.parent = &card->protocol->dev;
+ dev_set_name(&card->dev, "%02x:%02x", card->protocol->number, card->number);
+
+ card->dev.coherent_dma_mask = DMA_BIT_MASK(24);
+ card->dev.dma_mask = &card->dev.coherent_dma_mask;
+
+ dev_id = pnp_add_card_id(card, pnpid);
+ if (!dev_id) {
+ kfree(card);
+ return NULL;
+ }
+
+ return card;
+}
+
+static ssize_t pnp_show_card_name(struct device *dmdev,
+ struct device_attribute *attr, char *buf)
+{
+ char *str = buf;
+ struct pnp_card *card = to_pnp_card(dmdev);
+
+ str += sprintf(str, "%s\n", card->name);
+ return (str - buf);
+}
+
+static DEVICE_ATTR(name, S_IRUGO, pnp_show_card_name, NULL);
+
+static ssize_t pnp_show_card_ids(struct device *dmdev,
+ struct device_attribute *attr, char *buf)
+{
+ char *str = buf;
+ struct pnp_card *card = to_pnp_card(dmdev);
+ struct pnp_id *pos = card->id;
+
+ while (pos) {
+ str += sprintf(str, "%s\n", pos->id);
+ pos = pos->next;
+ }
+ return (str - buf);
+}
+
+static DEVICE_ATTR(card_id, S_IRUGO, pnp_show_card_ids, NULL);
+
+static int pnp_interface_attach_card(struct pnp_card *card)
+{
+ int rc = device_create_file(&card->dev, &dev_attr_name);
+
+ if (rc)
+ return rc;
+
+ rc = device_create_file(&card->dev, &dev_attr_card_id);
+ if (rc)
+ goto err_name;
+
+ return 0;
+
+err_name:
+ device_remove_file(&card->dev, &dev_attr_name);
+ return rc;
+}
+
+/**
+ * pnp_add_card - adds a PnP card to the PnP Layer
+ * @card: pointer to the card to add
+ */
+int pnp_add_card(struct pnp_card *card)
+{
+ int error;
+ struct list_head *pos, *temp;
+
+ card->dev.bus = NULL;
+ card->dev.release = &pnp_release_card;
+ error = device_register(&card->dev);
+ if (error) {
+ dev_err(&card->dev, "could not register (err=%d)\n", error);
+ put_device(&card->dev);
+ return error;
+ }
+
+ pnp_interface_attach_card(card);
+ mutex_lock(&pnp_lock);
+ list_add_tail(&card->global_list, &pnp_cards);
+ list_add_tail(&card->protocol_list, &card->protocol->cards);
+ mutex_unlock(&pnp_lock);
+
+ /* we wait until now to add devices in order to ensure the drivers
+ * will be able to use all of the related devices on the card
+ * without waiting an unreasonable length of time */
+ list_for_each(pos, &card->devices) {
+ struct pnp_dev *dev = card_to_pnp_dev(pos);
+ __pnp_add_device(dev);
+ }
+
+ /* match with card drivers */
+ list_for_each_safe(pos, temp, &pnp_card_drivers) {
+ struct pnp_card_driver *drv =
+ list_entry(pos, struct pnp_card_driver,
+ global_list);
+ card_probe(card, drv);
+ }
+ return 0;
+}
+
+/**
+ * pnp_remove_card - removes a PnP card from the PnP Layer
+ * @card: pointer to the card to remove
+ */
+void pnp_remove_card(struct pnp_card *card)
+{
+ struct list_head *pos, *temp;
+
+ device_unregister(&card->dev);
+ mutex_lock(&pnp_lock);
+ list_del(&card->global_list);
+ list_del(&card->protocol_list);
+ mutex_unlock(&pnp_lock);
+ list_for_each_safe(pos, temp, &card->devices) {
+ struct pnp_dev *dev = card_to_pnp_dev(pos);
+ pnp_remove_card_device(dev);
+ }
+}
+
+/**
+ * pnp_add_card_device - adds a device to the specified card
+ * @card: pointer to the card to add to
+ * @dev: pointer to the device to add
+ */
+int pnp_add_card_device(struct pnp_card *card, struct pnp_dev *dev)
+{
+ dev->dev.parent = &card->dev;
+ dev->card_link = NULL;
+ dev_set_name(&dev->dev, "%02x:%02x.%02x",
+ dev->protocol->number, card->number, dev->number);
+ mutex_lock(&pnp_lock);
+ dev->card = card;
+ list_add_tail(&dev->card_list, &card->devices);
+ mutex_unlock(&pnp_lock);
+ return 0;
+}
+
+/**
+ * pnp_remove_card_device- removes a device from the specified card
+ * @dev: pointer to the device to remove
+ */
+void pnp_remove_card_device(struct pnp_dev *dev)
+{
+ mutex_lock(&pnp_lock);
+ dev->card = NULL;
+ list_del(&dev->card_list);
+ mutex_unlock(&pnp_lock);
+ __pnp_remove_device(dev);
+}
+
+/**
+ * pnp_request_card_device - Searches for a PnP device under the specified card
+ * @clink: pointer to the card link, cannot be NULL
+ * @id: pointer to a PnP ID structure that explains the rules for finding the device
+ * @from: Starting place to search from. If NULL it will start from the beginning.
+ */
+struct pnp_dev *pnp_request_card_device(struct pnp_card_link *clink,
+ const char *id, struct pnp_dev *from)
+{
+ struct list_head *pos;
+ struct pnp_dev *dev;
+ struct pnp_card_driver *drv;
+ struct pnp_card *card;
+
+ if (!clink || !id)
+ return NULL;
+
+ card = clink->card;
+ drv = clink->driver;
+ if (!from) {
+ pos = card->devices.next;
+ } else {
+ if (from->card != card)
+ return NULL;
+ pos = from->card_list.next;
+ }
+ while (pos != &card->devices) {
+ dev = card_to_pnp_dev(pos);
+ if ((!dev->card_link) && compare_pnp_id(dev->id, id))
+ goto found;
+ pos = pos->next;
+ }
+
+ return NULL;
+
+found:
+ dev->card_link = clink;
+ dev->dev.driver = &drv->link.driver;
+ if (pnp_bus_type.probe(&dev->dev))
+ goto err_out;
+ if (device_bind_driver(&dev->dev))
+ goto err_out;
+
+ return dev;
+
+err_out:
+ dev->dev.driver = NULL;
+ dev->card_link = NULL;
+ return NULL;
+}
+
+/**
+ * pnp_release_card_device - call this when the driver no longer needs the device
+ * @dev: pointer to the PnP device structure
+ */
+void pnp_release_card_device(struct pnp_dev *dev)
+{
+ struct pnp_card_driver *drv = dev->card_link->driver;
+
+ drv->link.remove = &card_remove;
+ device_release_driver(&dev->dev);
+ drv->link.remove = &card_remove_first;
+}
+
+/*
+ * suspend/resume callbacks
+ */
+static int card_suspend(struct pnp_dev *dev, pm_message_t state)
+{
+ struct pnp_card_link *link = dev->card_link;
+
+ if (link->pm_state.event == state.event)
+ return 0;
+ link->pm_state = state;
+ return link->driver->suspend(link, state);
+}
+
+static int card_resume(struct pnp_dev *dev)
+{
+ struct pnp_card_link *link = dev->card_link;
+
+ if (link->pm_state.event == PM_EVENT_ON)
+ return 0;
+ link->pm_state = PMSG_ON;
+ link->driver->resume(link);
+ return 0;
+}
+
+/**
+ * pnp_register_card_driver - registers a PnP card driver with the PnP Layer
+ * @drv: pointer to the driver to register
+ */
+int pnp_register_card_driver(struct pnp_card_driver *drv)
+{
+ int error;
+ struct list_head *pos, *temp;
+
+ drv->link.name = drv->name;
+ drv->link.id_table = NULL; /* this will disable auto matching */
+ drv->link.flags = drv->flags;
+ drv->link.probe = NULL;
+ drv->link.remove = &card_remove_first;
+ drv->link.suspend = drv->suspend ? card_suspend : NULL;
+ drv->link.resume = drv->resume ? card_resume : NULL;
+
+ error = pnp_register_driver(&drv->link);
+ if (error < 0)
+ return error;
+
+ mutex_lock(&pnp_lock);
+ list_add_tail(&drv->global_list, &pnp_card_drivers);
+ mutex_unlock(&pnp_lock);
+
+ list_for_each_safe(pos, temp, &pnp_cards) {
+ struct pnp_card *card =
+ list_entry(pos, struct pnp_card, global_list);
+ card_probe(card, drv);
+ }
+ return 0;
+}
+
+/**
+ * pnp_unregister_card_driver - unregisters a PnP card driver from the PnP Layer
+ * @drv: pointer to the driver to unregister
+ */
+void pnp_unregister_card_driver(struct pnp_card_driver *drv)
+{
+ mutex_lock(&pnp_lock);
+ list_del(&drv->global_list);
+ mutex_unlock(&pnp_lock);
+ pnp_unregister_driver(&drv->link);
+}
+
+EXPORT_SYMBOL(pnp_request_card_device);
+EXPORT_SYMBOL(pnp_release_card_device);
+EXPORT_SYMBOL(pnp_register_card_driver);
+EXPORT_SYMBOL(pnp_unregister_card_driver);
diff --git a/drivers/pnp/core.c b/drivers/pnp/core.c
new file mode 100644
index 0000000..3bf18d7
--- /dev/null
+++ b/drivers/pnp/core.c
@@ -0,0 +1,253 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * core.c - contains all core device and protocol registration functions
+ *
+ * Copyright 2002 Adam Belay <ambx1@neo.rr.com>
+ */
+
+#include <linux/pnp.h>
+#include <linux/types.h>
+#include <linux/list.h>
+#include <linux/device.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/init.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+#include <linux/errno.h>
+#include <linux/dma-mapping.h>
+
+#include "base.h"
+
+static LIST_HEAD(pnp_protocols);
+LIST_HEAD(pnp_global);
+DEFINE_MUTEX(pnp_lock);
+
+/*
+ * ACPI or PNPBIOS should tell us about all platform devices, so we can
+ * skip some blind probes. ISAPNP typically enumerates only plug-in ISA
+ * devices, not built-in things like COM ports.
+ */
+int pnp_platform_devices;
+EXPORT_SYMBOL(pnp_platform_devices);
+
+void *pnp_alloc(long size)
+{
+ void *result;
+
+ result = kzalloc(size, GFP_KERNEL);
+ if (!result) {
+ printk(KERN_ERR "pnp: Out of Memory\n");
+ return NULL;
+ }
+ return result;
+}
+
+static void pnp_remove_protocol(struct pnp_protocol *protocol)
+{
+ mutex_lock(&pnp_lock);
+ list_del(&protocol->protocol_list);
+ mutex_unlock(&pnp_lock);
+}
+
+/**
+ * pnp_protocol_register - adds a pnp protocol to the pnp layer
+ * @protocol: pointer to the corresponding pnp_protocol structure
+ *
+ * Ex protocols: ISAPNP, PNPBIOS, etc
+ */
+int pnp_register_protocol(struct pnp_protocol *protocol)
+{
+ struct list_head *pos;
+ int nodenum, ret;
+
+ INIT_LIST_HEAD(&protocol->devices);
+ INIT_LIST_HEAD(&protocol->cards);
+ nodenum = 0;
+
+ mutex_lock(&pnp_lock);
+
+ /* assign the lowest unused number */
+ list_for_each(pos, &pnp_protocols) {
+ struct pnp_protocol *cur = to_pnp_protocol(pos);
+ if (cur->number == nodenum) {
+ pos = &pnp_protocols;
+ nodenum++;
+ }
+ }
+
+ protocol->number = nodenum;
+ dev_set_name(&protocol->dev, "pnp%d", nodenum);
+
+ list_add_tail(&protocol->protocol_list, &pnp_protocols);
+
+ mutex_unlock(&pnp_lock);
+
+ ret = device_register(&protocol->dev);
+ if (ret)
+ pnp_remove_protocol(protocol);
+
+ return ret;
+}
+
+/**
+ * pnp_protocol_unregister - removes a pnp protocol from the pnp layer
+ * @protocol: pointer to the corresponding pnp_protocol structure
+ */
+void pnp_unregister_protocol(struct pnp_protocol *protocol)
+{
+ pnp_remove_protocol(protocol);
+ device_unregister(&protocol->dev);
+}
+
+static void pnp_free_ids(struct pnp_dev *dev)
+{
+ struct pnp_id *id;
+ struct pnp_id *next;
+
+ id = dev->id;
+ while (id) {
+ next = id->next;
+ kfree(id);
+ id = next;
+ }
+}
+
+void pnp_free_resource(struct pnp_resource *pnp_res)
+{
+ list_del(&pnp_res->list);
+ kfree(pnp_res);
+}
+
+void pnp_free_resources(struct pnp_dev *dev)
+{
+ struct pnp_resource *pnp_res, *tmp;
+
+ list_for_each_entry_safe(pnp_res, tmp, &dev->resources, list) {
+ pnp_free_resource(pnp_res);
+ }
+}
+
+static void pnp_release_device(struct device *dmdev)
+{
+ struct pnp_dev *dev = to_pnp_dev(dmdev);
+
+ pnp_free_ids(dev);
+ pnp_free_resources(dev);
+ pnp_free_options(dev);
+ kfree(dev);
+}
+
+struct pnp_dev *pnp_alloc_dev(struct pnp_protocol *protocol, int id,
+ const char *pnpid)
+{
+ struct pnp_dev *dev;
+ struct pnp_id *dev_id;
+
+ dev = kzalloc(sizeof(struct pnp_dev), GFP_KERNEL);
+ if (!dev)
+ return NULL;
+
+ INIT_LIST_HEAD(&dev->resources);
+ INIT_LIST_HEAD(&dev->options);
+ dev->protocol = protocol;
+ dev->number = id;
+ dev->dma_mask = DMA_BIT_MASK(24);
+
+ dev->dev.parent = &dev->protocol->dev;
+ dev->dev.bus = &pnp_bus_type;
+ dev->dev.dma_mask = &dev->dma_mask;
+ dev->dev.coherent_dma_mask = dev->dma_mask;
+ dev->dev.release = &pnp_release_device;
+
+ dev_set_name(&dev->dev, "%02x:%02x", dev->protocol->number, dev->number);
+
+ dev_id = pnp_add_id(dev, pnpid);
+ if (!dev_id) {
+ kfree(dev);
+ return NULL;
+ }
+
+ return dev;
+}
+
+static void pnp_delist_device(struct pnp_dev *dev)
+{
+ mutex_lock(&pnp_lock);
+ list_del(&dev->global_list);
+ list_del(&dev->protocol_list);
+ mutex_unlock(&pnp_lock);
+}
+
+int __pnp_add_device(struct pnp_dev *dev)
+{
+ int ret;
+
+ pnp_fixup_device(dev);
+ dev->status = PNP_READY;
+
+ mutex_lock(&pnp_lock);
+
+ list_add_tail(&dev->global_list, &pnp_global);
+ list_add_tail(&dev->protocol_list, &dev->protocol->devices);
+
+ mutex_unlock(&pnp_lock);
+
+ ret = device_register(&dev->dev);
+ if (ret)
+ pnp_delist_device(dev);
+ else if (dev->protocol->can_wakeup)
+ device_set_wakeup_capable(&dev->dev,
+ dev->protocol->can_wakeup(dev));
+
+ return ret;
+}
+
+/*
+ * pnp_add_device - adds a pnp device to the pnp layer
+ * @dev: pointer to dev to add
+ *
+ * adds to driver model, name database, fixups, interface, etc.
+ */
+int pnp_add_device(struct pnp_dev *dev)
+{
+ int ret;
+ char buf[128];
+ int len = 0;
+ struct pnp_id *id;
+
+ if (dev->card)
+ return -EINVAL;
+
+ ret = __pnp_add_device(dev);
+ if (ret)
+ return ret;
+
+ buf[0] = '\0';
+ for (id = dev->id; id; id = id->next)
+ len += scnprintf(buf + len, sizeof(buf) - len, " %s", id->id);
+
+ dev_printk(KERN_DEBUG, &dev->dev, "%s device, IDs%s (%s)\n",
+ dev->protocol->name, buf,
+ dev->active ? "active" : "disabled");
+ return 0;
+}
+
+void __pnp_remove_device(struct pnp_dev *dev)
+{
+ pnp_delist_device(dev);
+ device_unregister(&dev->dev);
+}
+
+static int __init pnp_init(void)
+{
+ return bus_register(&pnp_bus_type);
+}
+
+subsys_initcall(pnp_init);
+
+int pnp_debug;
+
+#if defined(CONFIG_PNP_DEBUG_MESSAGES)
+module_param_named(debug, pnp_debug, int, 0644);
+#endif
diff --git a/drivers/pnp/driver.c b/drivers/pnp/driver.c
new file mode 100644
index 0000000..93a30a8
--- /dev/null
+++ b/drivers/pnp/driver.c
@@ -0,0 +1,317 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * driver.c - device id matching, driver model, etc.
+ *
+ * Copyright 2002 Adam Belay <ambx1@neo.rr.com>
+ */
+
+#include <linux/string.h>
+#include <linux/list.h>
+#include <linux/module.h>
+#include <linux/ctype.h>
+#include <linux/slab.h>
+#include <linux/pnp.h>
+#include "base.h"
+
+static int compare_func(const char *ida, const char *idb)
+{
+ int i;
+
+ /* we only need to compare the last 4 chars */
+ for (i = 3; i < 7; i++) {
+ if (ida[i] != 'X' &&
+ idb[i] != 'X' && toupper(ida[i]) != toupper(idb[i]))
+ return 0;
+ }
+ return 1;
+}
+
+int compare_pnp_id(struct pnp_id *pos, const char *id)
+{
+ if (!pos || !id || (strlen(id) != 7))
+ return 0;
+ if (memcmp(id, "ANYDEVS", 7) == 0)
+ return 1;
+ while (pos) {
+ if (memcmp(pos->id, id, 3) == 0)
+ if (compare_func(pos->id, id) == 1)
+ return 1;
+ pos = pos->next;
+ }
+ return 0;
+}
+
+static const struct pnp_device_id *match_device(struct pnp_driver *drv,
+ struct pnp_dev *dev)
+{
+ const struct pnp_device_id *drv_id = drv->id_table;
+
+ if (!drv_id)
+ return NULL;
+
+ while (*drv_id->id) {
+ if (compare_pnp_id(dev->id, drv_id->id))
+ return drv_id;
+ drv_id++;
+ }
+ return NULL;
+}
+
+int pnp_device_attach(struct pnp_dev *pnp_dev)
+{
+ mutex_lock(&pnp_lock);
+ if (pnp_dev->status != PNP_READY) {
+ mutex_unlock(&pnp_lock);
+ return -EBUSY;
+ }
+ pnp_dev->status = PNP_ATTACHED;
+ mutex_unlock(&pnp_lock);
+ return 0;
+}
+
+void pnp_device_detach(struct pnp_dev *pnp_dev)
+{
+ mutex_lock(&pnp_lock);
+ if (pnp_dev->status == PNP_ATTACHED)
+ pnp_dev->status = PNP_READY;
+ mutex_unlock(&pnp_lock);
+}
+
+static int pnp_device_probe(struct device *dev)
+{
+ int error;
+ struct pnp_driver *pnp_drv;
+ struct pnp_dev *pnp_dev;
+ const struct pnp_device_id *dev_id = NULL;
+ pnp_dev = to_pnp_dev(dev);
+ pnp_drv = to_pnp_driver(dev->driver);
+
+ error = pnp_device_attach(pnp_dev);
+ if (error < 0)
+ return error;
+
+ if (pnp_dev->active == 0) {
+ if (!(pnp_drv->flags & PNP_DRIVER_RES_DO_NOT_CHANGE)) {
+ error = pnp_activate_dev(pnp_dev);
+ if (error < 0)
+ return error;
+ }
+ } else if ((pnp_drv->flags & PNP_DRIVER_RES_DISABLE)
+ == PNP_DRIVER_RES_DISABLE) {
+ error = pnp_disable_dev(pnp_dev);
+ if (error < 0)
+ return error;
+ }
+ error = 0;
+ if (pnp_drv->probe) {
+ dev_id = match_device(pnp_drv, pnp_dev);
+ if (dev_id != NULL)
+ error = pnp_drv->probe(pnp_dev, dev_id);
+ }
+ if (error >= 0) {
+ pnp_dev->driver = pnp_drv;
+ error = 0;
+ } else
+ goto fail;
+
+ return error;
+
+fail:
+ pnp_device_detach(pnp_dev);
+ return error;
+}
+
+static int pnp_device_remove(struct device *dev)
+{
+ struct pnp_dev *pnp_dev = to_pnp_dev(dev);
+ struct pnp_driver *drv = pnp_dev->driver;
+
+ if (drv) {
+ if (drv->remove)
+ drv->remove(pnp_dev);
+ pnp_dev->driver = NULL;
+ }
+
+ if (pnp_dev->active &&
+ (!drv || !(drv->flags & PNP_DRIVER_RES_DO_NOT_CHANGE)))
+ pnp_disable_dev(pnp_dev);
+
+ pnp_device_detach(pnp_dev);
+ return 0;
+}
+
+static void pnp_device_shutdown(struct device *dev)
+{
+ struct pnp_dev *pnp_dev = to_pnp_dev(dev);
+ struct pnp_driver *drv = pnp_dev->driver;
+
+ if (drv && drv->shutdown)
+ drv->shutdown(pnp_dev);
+}
+
+static int pnp_bus_match(struct device *dev, struct device_driver *drv)
+{
+ struct pnp_dev *pnp_dev = to_pnp_dev(dev);
+ struct pnp_driver *pnp_drv = to_pnp_driver(drv);
+
+ if (match_device(pnp_drv, pnp_dev) == NULL)
+ return 0;
+ return 1;
+}
+
+static int __pnp_bus_suspend(struct device *dev, pm_message_t state)
+{
+ struct pnp_dev *pnp_dev = to_pnp_dev(dev);
+ struct pnp_driver *pnp_drv = pnp_dev->driver;
+ int error;
+
+ if (!pnp_drv)
+ return 0;
+
+ if (pnp_drv->driver.pm && pnp_drv->driver.pm->suspend) {
+ error = pnp_drv->driver.pm->suspend(dev);
+ suspend_report_result(pnp_drv->driver.pm->suspend, error);
+ if (error)
+ return error;
+ }
+
+ if (pnp_drv->suspend) {
+ error = pnp_drv->suspend(pnp_dev, state);
+ if (error)
+ return error;
+ }
+
+ if (pnp_can_disable(pnp_dev)) {
+ error = pnp_stop_dev(pnp_dev);
+ if (error)
+ return error;
+ }
+
+ if (pnp_can_suspend(pnp_dev))
+ pnp_dev->protocol->suspend(pnp_dev, state);
+ return 0;
+}
+
+static int pnp_bus_suspend(struct device *dev)
+{
+ return __pnp_bus_suspend(dev, PMSG_SUSPEND);
+}
+
+static int pnp_bus_freeze(struct device *dev)
+{
+ return __pnp_bus_suspend(dev, PMSG_FREEZE);
+}
+
+static int pnp_bus_poweroff(struct device *dev)
+{
+ return __pnp_bus_suspend(dev, PMSG_HIBERNATE);
+}
+
+static int pnp_bus_resume(struct device *dev)
+{
+ struct pnp_dev *pnp_dev = to_pnp_dev(dev);
+ struct pnp_driver *pnp_drv = pnp_dev->driver;
+ int error;
+
+ if (!pnp_drv)
+ return 0;
+
+ if (pnp_dev->protocol->resume) {
+ error = pnp_dev->protocol->resume(pnp_dev);
+ if (error)
+ return error;
+ }
+
+ if (pnp_can_write(pnp_dev)) {
+ error = pnp_start_dev(pnp_dev);
+ if (error)
+ return error;
+ }
+
+ if (pnp_drv->driver.pm && pnp_drv->driver.pm->resume) {
+ error = pnp_drv->driver.pm->resume(dev);
+ if (error)
+ return error;
+ }
+
+ if (pnp_drv->resume) {
+ error = pnp_drv->resume(pnp_dev);
+ if (error)
+ return error;
+ }
+
+ return 0;
+}
+
+static const struct dev_pm_ops pnp_bus_dev_pm_ops = {
+ /* Suspend callbacks */
+ .suspend = pnp_bus_suspend,
+ .resume = pnp_bus_resume,
+ /* Hibernate callbacks */
+ .freeze = pnp_bus_freeze,
+ .thaw = pnp_bus_resume,
+ .poweroff = pnp_bus_poweroff,
+ .restore = pnp_bus_resume,
+};
+
+struct bus_type pnp_bus_type = {
+ .name = "pnp",
+ .match = pnp_bus_match,
+ .probe = pnp_device_probe,
+ .remove = pnp_device_remove,
+ .shutdown = pnp_device_shutdown,
+ .pm = &pnp_bus_dev_pm_ops,
+ .dev_groups = pnp_dev_groups,
+};
+
+int pnp_register_driver(struct pnp_driver *drv)
+{
+ drv->driver.name = drv->name;
+ drv->driver.bus = &pnp_bus_type;
+
+ return driver_register(&drv->driver);
+}
+
+void pnp_unregister_driver(struct pnp_driver *drv)
+{
+ driver_unregister(&drv->driver);
+}
+
+/**
+ * pnp_add_id - adds an EISA id to the specified device
+ * @dev: pointer to the desired device
+ * @id: pointer to an EISA id string
+ */
+struct pnp_id *pnp_add_id(struct pnp_dev *dev, const char *id)
+{
+ struct pnp_id *dev_id, *ptr;
+
+ dev_id = kzalloc(sizeof(struct pnp_id), GFP_KERNEL);
+ if (!dev_id)
+ return NULL;
+
+ dev_id->id[0] = id[0];
+ dev_id->id[1] = id[1];
+ dev_id->id[2] = id[2];
+ dev_id->id[3] = tolower(id[3]);
+ dev_id->id[4] = tolower(id[4]);
+ dev_id->id[5] = tolower(id[5]);
+ dev_id->id[6] = tolower(id[6]);
+ dev_id->id[7] = '\0';
+
+ dev_id->next = NULL;
+ ptr = dev->id;
+ while (ptr && ptr->next)
+ ptr = ptr->next;
+ if (ptr)
+ ptr->next = dev_id;
+ else
+ dev->id = dev_id;
+
+ return dev_id;
+}
+
+EXPORT_SYMBOL(pnp_register_driver);
+EXPORT_SYMBOL(pnp_unregister_driver);
+EXPORT_SYMBOL(pnp_device_attach);
+EXPORT_SYMBOL(pnp_device_detach);
diff --git a/drivers/pnp/interface.c b/drivers/pnp/interface.c
new file mode 100644
index 0000000..187e4a1
--- /dev/null
+++ b/drivers/pnp/interface.c
@@ -0,0 +1,469 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * interface.c - contains everything related to the user interface
+ *
+ * Some code, especially possible resource dumping is based on isapnp_proc.c (c) Jaroslav Kysela <perex@perex.cz>
+ * Copyright 2002 Adam Belay <ambx1@neo.rr.com>
+ * Copyright (C) 2008 Hewlett-Packard Development Company, L.P.
+ * Bjorn Helgaas <bjorn.helgaas@hp.com>
+ */
+
+#include <linux/pnp.h>
+#include <linux/string.h>
+#include <linux/errno.h>
+#include <linux/list.h>
+#include <linux/types.h>
+#include <linux/stat.h>
+#include <linux/ctype.h>
+#include <linux/slab.h>
+#include <linux/mutex.h>
+
+#include <linux/uaccess.h>
+
+#include "base.h"
+
+struct pnp_info_buffer {
+ char *buffer; /* pointer to begin of buffer */
+ char *curr; /* current position in buffer */
+ unsigned long size; /* current size */
+ unsigned long len; /* total length of buffer */
+ int stop; /* stop flag */
+ int error; /* error code */
+};
+
+typedef struct pnp_info_buffer pnp_info_buffer_t;
+
+static int pnp_printf(pnp_info_buffer_t * buffer, char *fmt, ...)
+{
+ va_list args;
+ int res;
+
+ if (buffer->stop || buffer->error)
+ return 0;
+ va_start(args, fmt);
+ res = vsnprintf(buffer->curr, buffer->len - buffer->size, fmt, args);
+ va_end(args);
+ if (buffer->size + res >= buffer->len) {
+ buffer->stop = 1;
+ return 0;
+ }
+ buffer->curr += res;
+ buffer->size += res;
+ return res;
+}
+
+static void pnp_print_port(pnp_info_buffer_t * buffer, char *space,
+ struct pnp_port *port)
+{
+ pnp_printf(buffer, "%sport %#llx-%#llx, align %#llx, size %#llx, "
+ "%i-bit address decoding\n", space,
+ (unsigned long long) port->min,
+ (unsigned long long) port->max,
+ port->align ? ((unsigned long long) port->align - 1) : 0,
+ (unsigned long long) port->size,
+ port->flags & IORESOURCE_IO_16BIT_ADDR ? 16 : 10);
+}
+
+static void pnp_print_irq(pnp_info_buffer_t * buffer, char *space,
+ struct pnp_irq *irq)
+{
+ int first = 1, i;
+
+ pnp_printf(buffer, "%sirq ", space);
+ for (i = 0; i < PNP_IRQ_NR; i++)
+ if (test_bit(i, irq->map.bits)) {
+ if (!first) {
+ pnp_printf(buffer, ",");
+ } else {
+ first = 0;
+ }
+ if (i == 2 || i == 9)
+ pnp_printf(buffer, "2/9");
+ else
+ pnp_printf(buffer, "%i", i);
+ }
+ if (bitmap_empty(irq->map.bits, PNP_IRQ_NR))
+ pnp_printf(buffer, "<none>");
+ if (irq->flags & IORESOURCE_IRQ_HIGHEDGE)
+ pnp_printf(buffer, " High-Edge");
+ if (irq->flags & IORESOURCE_IRQ_LOWEDGE)
+ pnp_printf(buffer, " Low-Edge");
+ if (irq->flags & IORESOURCE_IRQ_HIGHLEVEL)
+ pnp_printf(buffer, " High-Level");
+ if (irq->flags & IORESOURCE_IRQ_LOWLEVEL)
+ pnp_printf(buffer, " Low-Level");
+ if (irq->flags & IORESOURCE_IRQ_OPTIONAL)
+ pnp_printf(buffer, " (optional)");
+ pnp_printf(buffer, "\n");
+}
+
+static void pnp_print_dma(pnp_info_buffer_t * buffer, char *space,
+ struct pnp_dma *dma)
+{
+ int first = 1, i;
+ char *s;
+
+ pnp_printf(buffer, "%sdma ", space);
+ for (i = 0; i < 8; i++)
+ if (dma->map & (1 << i)) {
+ if (!first) {
+ pnp_printf(buffer, ",");
+ } else {
+ first = 0;
+ }
+ pnp_printf(buffer, "%i", i);
+ }
+ if (!dma->map)
+ pnp_printf(buffer, "<none>");
+ switch (dma->flags & IORESOURCE_DMA_TYPE_MASK) {
+ case IORESOURCE_DMA_8BIT:
+ s = "8-bit";
+ break;
+ case IORESOURCE_DMA_8AND16BIT:
+ s = "8-bit&16-bit";
+ break;
+ default:
+ s = "16-bit";
+ }
+ pnp_printf(buffer, " %s", s);
+ if (dma->flags & IORESOURCE_DMA_MASTER)
+ pnp_printf(buffer, " master");
+ if (dma->flags & IORESOURCE_DMA_BYTE)
+ pnp_printf(buffer, " byte-count");
+ if (dma->flags & IORESOURCE_DMA_WORD)
+ pnp_printf(buffer, " word-count");
+ switch (dma->flags & IORESOURCE_DMA_SPEED_MASK) {
+ case IORESOURCE_DMA_TYPEA:
+ s = "type-A";
+ break;
+ case IORESOURCE_DMA_TYPEB:
+ s = "type-B";
+ break;
+ case IORESOURCE_DMA_TYPEF:
+ s = "type-F";
+ break;
+ default:
+ s = "compatible";
+ break;
+ }
+ pnp_printf(buffer, " %s\n", s);
+}
+
+static void pnp_print_mem(pnp_info_buffer_t * buffer, char *space,
+ struct pnp_mem *mem)
+{
+ char *s;
+
+ pnp_printf(buffer, "%sMemory %#llx-%#llx, align %#llx, size %#llx",
+ space, (unsigned long long) mem->min,
+ (unsigned long long) mem->max,
+ (unsigned long long) mem->align,
+ (unsigned long long) mem->size);
+ if (mem->flags & IORESOURCE_MEM_WRITEABLE)
+ pnp_printf(buffer, ", writeable");
+ if (mem->flags & IORESOURCE_MEM_CACHEABLE)
+ pnp_printf(buffer, ", cacheable");
+ if (mem->flags & IORESOURCE_MEM_RANGELENGTH)
+ pnp_printf(buffer, ", range-length");
+ if (mem->flags & IORESOURCE_MEM_SHADOWABLE)
+ pnp_printf(buffer, ", shadowable");
+ if (mem->flags & IORESOURCE_MEM_EXPANSIONROM)
+ pnp_printf(buffer, ", expansion ROM");
+ switch (mem->flags & IORESOURCE_MEM_TYPE_MASK) {
+ case IORESOURCE_MEM_8BIT:
+ s = "8-bit";
+ break;
+ case IORESOURCE_MEM_8AND16BIT:
+ s = "8-bit&16-bit";
+ break;
+ case IORESOURCE_MEM_32BIT:
+ s = "32-bit";
+ break;
+ default:
+ s = "16-bit";
+ }
+ pnp_printf(buffer, ", %s\n", s);
+}
+
+static void pnp_print_option(pnp_info_buffer_t * buffer, char *space,
+ struct pnp_option *option)
+{
+ switch (option->type) {
+ case IORESOURCE_IO:
+ pnp_print_port(buffer, space, &option->u.port);
+ break;
+ case IORESOURCE_MEM:
+ pnp_print_mem(buffer, space, &option->u.mem);
+ break;
+ case IORESOURCE_IRQ:
+ pnp_print_irq(buffer, space, &option->u.irq);
+ break;
+ case IORESOURCE_DMA:
+ pnp_print_dma(buffer, space, &option->u.dma);
+ break;
+ }
+}
+
+static ssize_t options_show(struct device *dmdev, struct device_attribute *attr,
+ char *buf)
+{
+ struct pnp_dev *dev = to_pnp_dev(dmdev);
+ pnp_info_buffer_t *buffer;
+ struct pnp_option *option;
+ int ret, dep = 0, set = 0;
+ char *indent;
+
+ buffer = pnp_alloc(sizeof(pnp_info_buffer_t));
+ if (!buffer)
+ return -ENOMEM;
+
+ buffer->len = PAGE_SIZE;
+ buffer->buffer = buf;
+ buffer->curr = buffer->buffer;
+
+ list_for_each_entry(option, &dev->options, list) {
+ if (pnp_option_is_dependent(option)) {
+ indent = " ";
+ if (!dep || pnp_option_set(option) != set) {
+ set = pnp_option_set(option);
+ dep = 1;
+ pnp_printf(buffer, "Dependent: %02i - "
+ "Priority %s\n", set,
+ pnp_option_priority_name(option));
+ }
+ } else {
+ dep = 0;
+ indent = "";
+ }
+ pnp_print_option(buffer, indent, option);
+ }
+
+ ret = (buffer->curr - buf);
+ kfree(buffer);
+ return ret;
+}
+static DEVICE_ATTR_RO(options);
+
+static ssize_t resources_show(struct device *dmdev,
+ struct device_attribute *attr, char *buf)
+{
+ struct pnp_dev *dev = to_pnp_dev(dmdev);
+ pnp_info_buffer_t *buffer;
+ struct pnp_resource *pnp_res;
+ struct resource *res;
+ int ret;
+
+ if (!dev)
+ return -EINVAL;
+
+ buffer = pnp_alloc(sizeof(pnp_info_buffer_t));
+ if (!buffer)
+ return -ENOMEM;
+
+ buffer->len = PAGE_SIZE;
+ buffer->buffer = buf;
+ buffer->curr = buffer->buffer;
+
+ pnp_printf(buffer, "state = %s\n", dev->active ? "active" : "disabled");
+
+ list_for_each_entry(pnp_res, &dev->resources, list) {
+ res = &pnp_res->res;
+
+ pnp_printf(buffer, pnp_resource_type_name(res));
+
+ if (res->flags & IORESOURCE_DISABLED) {
+ pnp_printf(buffer, " disabled\n");
+ continue;
+ }
+
+ switch (pnp_resource_type(res)) {
+ case IORESOURCE_IO:
+ case IORESOURCE_MEM:
+ case IORESOURCE_BUS:
+ pnp_printf(buffer, " %#llx-%#llx%s\n",
+ (unsigned long long) res->start,
+ (unsigned long long) res->end,
+ res->flags & IORESOURCE_WINDOW ?
+ " window" : "");
+ break;
+ case IORESOURCE_IRQ:
+ case IORESOURCE_DMA:
+ pnp_printf(buffer, " %lld\n",
+ (unsigned long long) res->start);
+ break;
+ }
+ }
+
+ ret = (buffer->curr - buf);
+ kfree(buffer);
+ return ret;
+}
+
+static char *pnp_get_resource_value(char *buf,
+ unsigned long type,
+ resource_size_t *start,
+ resource_size_t *end,
+ unsigned long *flags)
+{
+ if (start)
+ *start = 0;
+ if (end)
+ *end = 0;
+ if (flags)
+ *flags = 0;
+
+ /* TBD: allow for disabled resources */
+
+ buf = skip_spaces(buf);
+ if (start) {
+ *start = simple_strtoull(buf, &buf, 0);
+ if (end) {
+ buf = skip_spaces(buf);
+ if (*buf == '-') {
+ buf = skip_spaces(buf + 1);
+ *end = simple_strtoull(buf, &buf, 0);
+ } else
+ *end = *start;
+ }
+ }
+
+ /* TBD: allow for additional flags, e.g., IORESOURCE_WINDOW */
+
+ return buf;
+}
+
+static ssize_t resources_store(struct device *dmdev,
+ struct device_attribute *attr, const char *ubuf,
+ size_t count)
+{
+ struct pnp_dev *dev = to_pnp_dev(dmdev);
+ char *buf = (void *)ubuf;
+ int retval = 0;
+
+ if (dev->status & PNP_ATTACHED) {
+ retval = -EBUSY;
+ dev_info(&dev->dev, "in use; can't configure\n");
+ goto done;
+ }
+
+ buf = skip_spaces(buf);
+ if (!strncasecmp(buf, "disable", 7)) {
+ retval = pnp_disable_dev(dev);
+ goto done;
+ }
+ if (!strncasecmp(buf, "activate", 8)) {
+ retval = pnp_activate_dev(dev);
+ goto done;
+ }
+ if (!strncasecmp(buf, "fill", 4)) {
+ if (dev->active)
+ goto done;
+ retval = pnp_auto_config_dev(dev);
+ goto done;
+ }
+ if (!strncasecmp(buf, "auto", 4)) {
+ if (dev->active)
+ goto done;
+ pnp_init_resources(dev);
+ retval = pnp_auto_config_dev(dev);
+ goto done;
+ }
+ if (!strncasecmp(buf, "clear", 5)) {
+ if (dev->active)
+ goto done;
+ pnp_init_resources(dev);
+ goto done;
+ }
+ if (!strncasecmp(buf, "get", 3)) {
+ mutex_lock(&pnp_res_mutex);
+ if (pnp_can_read(dev))
+ dev->protocol->get(dev);
+ mutex_unlock(&pnp_res_mutex);
+ goto done;
+ }
+ if (!strncasecmp(buf, "set", 3)) {
+ resource_size_t start;
+ resource_size_t end;
+ unsigned long flags;
+
+ if (dev->active)
+ goto done;
+ buf += 3;
+ pnp_init_resources(dev);
+ mutex_lock(&pnp_res_mutex);
+ while (1) {
+ buf = skip_spaces(buf);
+ if (!strncasecmp(buf, "io", 2)) {
+ buf = pnp_get_resource_value(buf + 2,
+ IORESOURCE_IO,
+ &start, &end,
+ &flags);
+ pnp_add_io_resource(dev, start, end, flags);
+ } else if (!strncasecmp(buf, "mem", 3)) {
+ buf = pnp_get_resource_value(buf + 3,
+ IORESOURCE_MEM,
+ &start, &end,
+ &flags);
+ pnp_add_mem_resource(dev, start, end, flags);
+ } else if (!strncasecmp(buf, "irq", 3)) {
+ buf = pnp_get_resource_value(buf + 3,
+ IORESOURCE_IRQ,
+ &start, NULL,
+ &flags);
+ pnp_add_irq_resource(dev, start, flags);
+ } else if (!strncasecmp(buf, "dma", 3)) {
+ buf = pnp_get_resource_value(buf + 3,
+ IORESOURCE_DMA,
+ &start, NULL,
+ &flags);
+ pnp_add_dma_resource(dev, start, flags);
+ } else if (!strncasecmp(buf, "bus", 3)) {
+ buf = pnp_get_resource_value(buf + 3,
+ IORESOURCE_BUS,
+ &start, &end,
+ NULL);
+ pnp_add_bus_resource(dev, start, end);
+ } else
+ break;
+ }
+ mutex_unlock(&pnp_res_mutex);
+ goto done;
+ }
+
+done:
+ if (retval < 0)
+ return retval;
+ return count;
+}
+static DEVICE_ATTR_RW(resources);
+
+static ssize_t id_show(struct device *dmdev, struct device_attribute *attr,
+ char *buf)
+{
+ char *str = buf;
+ struct pnp_dev *dev = to_pnp_dev(dmdev);
+ struct pnp_id *pos = dev->id;
+
+ while (pos) {
+ str += sprintf(str, "%s\n", pos->id);
+ pos = pos->next;
+ }
+ return (str - buf);
+}
+static DEVICE_ATTR_RO(id);
+
+static struct attribute *pnp_dev_attrs[] = {
+ &dev_attr_resources.attr,
+ &dev_attr_options.attr,
+ &dev_attr_id.attr,
+ NULL,
+};
+
+static const struct attribute_group pnp_dev_group = {
+ .attrs = pnp_dev_attrs,
+};
+
+const struct attribute_group *pnp_dev_groups[] = {
+ &pnp_dev_group,
+ NULL,
+};
diff --git a/drivers/pnp/isapnp/Kconfig b/drivers/pnp/isapnp/Kconfig
new file mode 100644
index 0000000..a1af146
--- /dev/null
+++ b/drivers/pnp/isapnp/Kconfig
@@ -0,0 +1,11 @@
+#
+# ISA Plug and Play configuration
+#
+config ISAPNP
+ bool "ISA Plug and Play support"
+ depends on ISA || COMPILE_TEST
+ help
+ Say Y here if you would like support for ISA Plug and Play devices.
+ Some information is in <file:Documentation/isapnp.txt>.
+
+ If unsure, say Y.
diff --git a/drivers/pnp/isapnp/Makefile b/drivers/pnp/isapnp/Makefile
new file mode 100644
index 0000000..6e607aa
--- /dev/null
+++ b/drivers/pnp/isapnp/Makefile
@@ -0,0 +1,7 @@
+#
+# Makefile for the kernel ISAPNP driver.
+#
+obj-y += pnp.o
+pnp-y := core.o compat.o
+
+pnp-$(CONFIG_PROC_FS) += proc.o
diff --git a/drivers/pnp/isapnp/compat.c b/drivers/pnp/isapnp/compat.c
new file mode 100644
index 0000000..6c845b6
--- /dev/null
+++ b/drivers/pnp/isapnp/compat.c
@@ -0,0 +1,90 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * compat.c - A series of functions to make it easier to convert drivers that use
+ * the old isapnp APIs. If possible use the new APIs instead.
+ *
+ * Copyright 2002 Adam Belay <ambx1@neo.rr.com>
+ */
+
+#include <linux/module.h>
+#include <linux/isapnp.h>
+#include <linux/string.h>
+
+static void pnp_convert_id(char *buf, unsigned short vendor,
+ unsigned short device)
+{
+ sprintf(buf, "%c%c%c%x%x%x%x",
+ 'A' + ((vendor >> 2) & 0x3f) - 1,
+ 'A' + (((vendor & 3) << 3) | ((vendor >> 13) & 7)) - 1,
+ 'A' + ((vendor >> 8) & 0x1f) - 1,
+ (device >> 4) & 0x0f, device & 0x0f,
+ (device >> 12) & 0x0f, (device >> 8) & 0x0f);
+}
+
+struct pnp_card *pnp_find_card(unsigned short vendor, unsigned short device,
+ struct pnp_card *from)
+{
+ char id[8];
+ char any[8];
+ struct list_head *list;
+
+ pnp_convert_id(id, vendor, device);
+ pnp_convert_id(any, ISAPNP_ANY_ID, ISAPNP_ANY_ID);
+
+ list = from ? from->global_list.next : pnp_cards.next;
+
+ while (list != &pnp_cards) {
+ struct pnp_card *card = global_to_pnp_card(list);
+
+ if (compare_pnp_id(card->id, id) || (memcmp(id, any, 7) == 0))
+ return card;
+ list = list->next;
+ }
+ return NULL;
+}
+
+struct pnp_dev *pnp_find_dev(struct pnp_card *card, unsigned short vendor,
+ unsigned short function, struct pnp_dev *from)
+{
+ char id[8];
+ char any[8];
+
+ pnp_convert_id(id, vendor, function);
+ pnp_convert_id(any, ISAPNP_ANY_ID, ISAPNP_ANY_ID);
+ if (card == NULL) { /* look for a logical device from all cards */
+ struct list_head *list;
+
+ list = pnp_global.next;
+ if (from)
+ list = from->global_list.next;
+
+ while (list != &pnp_global) {
+ struct pnp_dev *dev = global_to_pnp_dev(list);
+
+ if (compare_pnp_id(dev->id, id) ||
+ (memcmp(id, any, 7) == 0))
+ return dev;
+ list = list->next;
+ }
+ } else {
+ struct list_head *list;
+
+ list = card->devices.next;
+ if (from) {
+ list = from->card_list.next;
+ if (from->card != card) /* something is wrong */
+ return NULL;
+ }
+ while (list != &card->devices) {
+ struct pnp_dev *dev = card_to_pnp_dev(list);
+
+ if (compare_pnp_id(dev->id, id))
+ return dev;
+ list = list->next;
+ }
+ }
+ return NULL;
+}
+
+EXPORT_SYMBOL(pnp_find_card);
+EXPORT_SYMBOL(pnp_find_dev);
diff --git a/drivers/pnp/isapnp/core.c b/drivers/pnp/isapnp/core.c
new file mode 100644
index 0000000..d8bf5a1
--- /dev/null
+++ b/drivers/pnp/isapnp/core.c
@@ -0,0 +1,1106 @@
+/*
+ * ISA Plug & Play support
+ * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
+ *
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ * Changelog:
+ * 2000-01-01 Added quirks handling for buggy hardware
+ * Peter Denison <peterd@pnd-pc.demon.co.uk>
+ * 2000-06-14 Added isapnp_probe_devs() and isapnp_activate_dev()
+ * Christoph Hellwig <hch@infradead.org>
+ * 2001-06-03 Added release_region calls to correspond with
+ * request_region calls when a failure occurs. Also
+ * added KERN_* constants to printk() calls.
+ * 2001-11-07 Added isapnp_{,un}register_driver calls along the lines
+ * of the pci driver interface
+ * Kai Germaschewski <kai.germaschewski@gmx.de>
+ * 2002-06-06 Made the use of dma channel 0 configurable
+ * Gerald Teschl <gerald.teschl@univie.ac.at>
+ * 2002-10-06 Ported to PnP Layer - Adam Belay <ambx1@neo.rr.com>
+ * 2003-08-11 Resource Management Updates - Adam Belay <ambx1@neo.rr.com>
+ */
+
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/errno.h>
+#include <linux/delay.h>
+#include <linux/init.h>
+#include <linux/isapnp.h>
+#include <linux/mutex.h>
+#include <asm/io.h>
+
+#include "../base.h"
+
+#if 0
+#define ISAPNP_REGION_OK
+#endif
+
+int isapnp_disable; /* Disable ISA PnP */
+static int isapnp_rdp; /* Read Data Port */
+static int isapnp_reset = 1; /* reset all PnP cards (deactivate) */
+static int isapnp_verbose = 1; /* verbose mode */
+
+module_param(isapnp_disable, int, 0);
+MODULE_PARM_DESC(isapnp_disable, "ISA Plug & Play disable");
+module_param(isapnp_rdp, int, 0);
+MODULE_PARM_DESC(isapnp_rdp, "ISA Plug & Play read data port");
+module_param(isapnp_reset, int, 0);
+MODULE_PARM_DESC(isapnp_reset, "ISA Plug & Play reset all cards");
+module_param(isapnp_verbose, int, 0);
+MODULE_PARM_DESC(isapnp_verbose, "ISA Plug & Play verbose mode");
+
+#define _PIDXR 0x279
+#define _PNPWRP 0xa79
+
+/* short tags */
+#define _STAG_PNPVERNO 0x01
+#define _STAG_LOGDEVID 0x02
+#define _STAG_COMPATDEVID 0x03
+#define _STAG_IRQ 0x04
+#define _STAG_DMA 0x05
+#define _STAG_STARTDEP 0x06
+#define _STAG_ENDDEP 0x07
+#define _STAG_IOPORT 0x08
+#define _STAG_FIXEDIO 0x09
+#define _STAG_VENDOR 0x0e
+#define _STAG_END 0x0f
+/* long tags */
+#define _LTAG_MEMRANGE 0x81
+#define _LTAG_ANSISTR 0x82
+#define _LTAG_UNICODESTR 0x83
+#define _LTAG_VENDOR 0x84
+#define _LTAG_MEM32RANGE 0x85
+#define _LTAG_FIXEDMEM32RANGE 0x86
+
+/* Logical device control and configuration registers */
+
+#define ISAPNP_CFG_ACTIVATE 0x30 /* byte */
+#define ISAPNP_CFG_MEM 0x40 /* 4 * dword */
+#define ISAPNP_CFG_PORT 0x60 /* 8 * word */
+#define ISAPNP_CFG_IRQ 0x70 /* 2 * word */
+#define ISAPNP_CFG_DMA 0x74 /* 2 * byte */
+
+/*
+ * Sizes of ISAPNP logical device configuration register sets.
+ * See PNP-ISA-v1.0a.pdf, Appendix A.
+ */
+#define ISAPNP_MAX_MEM 4
+#define ISAPNP_MAX_PORT 8
+#define ISAPNP_MAX_IRQ 2
+#define ISAPNP_MAX_DMA 2
+
+static unsigned char isapnp_checksum_value;
+static DEFINE_MUTEX(isapnp_cfg_mutex);
+static int isapnp_csn_count;
+
+/* some prototypes */
+
+static inline void write_data(unsigned char x)
+{
+ outb(x, _PNPWRP);
+}
+
+static inline void write_address(unsigned char x)
+{
+ outb(x, _PIDXR);
+ udelay(20);
+}
+
+static inline unsigned char read_data(void)
+{
+ unsigned char val = inb(isapnp_rdp);
+ return val;
+}
+
+unsigned char isapnp_read_byte(unsigned char idx)
+{
+ write_address(idx);
+ return read_data();
+}
+
+static unsigned short isapnp_read_word(unsigned char idx)
+{
+ unsigned short val;
+
+ val = isapnp_read_byte(idx);
+ val = (val << 8) + isapnp_read_byte(idx + 1);
+ return val;
+}
+
+void isapnp_write_byte(unsigned char idx, unsigned char val)
+{
+ write_address(idx);
+ write_data(val);
+}
+
+static void isapnp_write_word(unsigned char idx, unsigned short val)
+{
+ isapnp_write_byte(idx, val >> 8);
+ isapnp_write_byte(idx + 1, val);
+}
+
+static void isapnp_key(void)
+{
+ unsigned char code = 0x6a, msb;
+ int i;
+
+ mdelay(1);
+ write_address(0x00);
+ write_address(0x00);
+
+ write_address(code);
+
+ for (i = 1; i < 32; i++) {
+ msb = ((code & 0x01) ^ ((code & 0x02) >> 1)) << 7;
+ code = (code >> 1) | msb;
+ write_address(code);
+ }
+}
+
+/* place all pnp cards in wait-for-key state */
+static void isapnp_wait(void)
+{
+ isapnp_write_byte(0x02, 0x02);
+}
+
+static void isapnp_wake(unsigned char csn)
+{
+ isapnp_write_byte(0x03, csn);
+}
+
+static void isapnp_device(unsigned char logdev)
+{
+ isapnp_write_byte(0x07, logdev);
+}
+
+static void isapnp_activate(unsigned char logdev)
+{
+ isapnp_device(logdev);
+ isapnp_write_byte(ISAPNP_CFG_ACTIVATE, 1);
+ udelay(250);
+}
+
+static void isapnp_deactivate(unsigned char logdev)
+{
+ isapnp_device(logdev);
+ isapnp_write_byte(ISAPNP_CFG_ACTIVATE, 0);
+ udelay(500);
+}
+
+static void __init isapnp_peek(unsigned char *data, int bytes)
+{
+ int i, j;
+ unsigned char d = 0;
+
+ for (i = 1; i <= bytes; i++) {
+ for (j = 0; j < 20; j++) {
+ d = isapnp_read_byte(0x05);
+ if (d & 1)
+ break;
+ udelay(100);
+ }
+ if (!(d & 1)) {
+ if (data != NULL)
+ *data++ = 0xff;
+ continue;
+ }
+ d = isapnp_read_byte(0x04); /* PRESDI */
+ isapnp_checksum_value += d;
+ if (data != NULL)
+ *data++ = d;
+ }
+}
+
+#define RDP_STEP 32 /* minimum is 4 */
+
+static int isapnp_next_rdp(void)
+{
+ int rdp = isapnp_rdp;
+ static int old_rdp = 0;
+
+ if (old_rdp) {
+ release_region(old_rdp, 1);
+ old_rdp = 0;
+ }
+ while (rdp <= 0x3ff) {
+ /*
+ * We cannot use NE2000 probe spaces for ISAPnP or we
+ * will lock up machines.
+ */
+ if ((rdp < 0x280 || rdp > 0x380)
+ && request_region(rdp, 1, "ISAPnP")) {
+ isapnp_rdp = rdp;
+ old_rdp = rdp;
+ return 0;
+ }
+ rdp += RDP_STEP;
+ }
+ return -1;
+}
+
+/* Set read port address */
+static inline void isapnp_set_rdp(void)
+{
+ isapnp_write_byte(0x00, isapnp_rdp >> 2);
+ udelay(100);
+}
+
+/*
+ * Perform an isolation. The port selection code now tries to avoid
+ * "dangerous to read" ports.
+ */
+static int __init isapnp_isolate_rdp_select(void)
+{
+ isapnp_wait();
+ isapnp_key();
+
+ /* Control: reset CSN and conditionally everything else too */
+ isapnp_write_byte(0x02, isapnp_reset ? 0x05 : 0x04);
+ mdelay(2);
+
+ isapnp_wait();
+ isapnp_key();
+ isapnp_wake(0x00);
+
+ if (isapnp_next_rdp() < 0) {
+ isapnp_wait();
+ return -1;
+ }
+
+ isapnp_set_rdp();
+ udelay(1000);
+ write_address(0x01);
+ udelay(1000);
+ return 0;
+}
+
+/*
+ * Isolate (assign uniqued CSN) to all ISA PnP devices.
+ */
+static int __init isapnp_isolate(void)
+{
+ unsigned char checksum = 0x6a;
+ unsigned char chksum = 0x00;
+ unsigned char bit = 0x00;
+ int data;
+ int csn = 0;
+ int i;
+ int iteration = 1;
+
+ isapnp_rdp = 0x213;
+ if (isapnp_isolate_rdp_select() < 0)
+ return -1;
+
+ while (1) {
+ for (i = 1; i <= 64; i++) {
+ data = read_data() << 8;
+ udelay(250);
+ data = data | read_data();
+ udelay(250);
+ if (data == 0x55aa)
+ bit = 0x01;
+ checksum =
+ ((((checksum ^ (checksum >> 1)) & 0x01) ^ bit) << 7)
+ | (checksum >> 1);
+ bit = 0x00;
+ }
+ for (i = 65; i <= 72; i++) {
+ data = read_data() << 8;
+ udelay(250);
+ data = data | read_data();
+ udelay(250);
+ if (data == 0x55aa)
+ chksum |= (1 << (i - 65));
+ }
+ if (checksum != 0x00 && checksum == chksum) {
+ csn++;
+
+ isapnp_write_byte(0x06, csn);
+ udelay(250);
+ iteration++;
+ isapnp_wake(0x00);
+ isapnp_set_rdp();
+ udelay(1000);
+ write_address(0x01);
+ udelay(1000);
+ goto __next;
+ }
+ if (iteration == 1) {
+ isapnp_rdp += RDP_STEP;
+ if (isapnp_isolate_rdp_select() < 0)
+ return -1;
+ } else if (iteration > 1) {
+ break;
+ }
+__next:
+ if (csn == 255)
+ break;
+ checksum = 0x6a;
+ chksum = 0x00;
+ bit = 0x00;
+ }
+ isapnp_wait();
+ isapnp_csn_count = csn;
+ return csn;
+}
+
+/*
+ * Read one tag from stream.
+ */
+static int __init isapnp_read_tag(unsigned char *type, unsigned short *size)
+{
+ unsigned char tag, tmp[2];
+
+ isapnp_peek(&tag, 1);
+ if (tag == 0) /* invalid tag */
+ return -1;
+ if (tag & 0x80) { /* large item */
+ *type = tag;
+ isapnp_peek(tmp, 2);
+ *size = (tmp[1] << 8) | tmp[0];
+ } else {
+ *type = (tag >> 3) & 0x0f;
+ *size = tag & 0x07;
+ }
+ if (*type == 0xff && *size == 0xffff) /* probably invalid data */
+ return -1;
+ return 0;
+}
+
+/*
+ * Skip specified number of bytes from stream.
+ */
+static void __init isapnp_skip_bytes(int count)
+{
+ isapnp_peek(NULL, count);
+}
+
+/*
+ * Parse logical device tag.
+ */
+static struct pnp_dev *__init isapnp_parse_device(struct pnp_card *card,
+ int size, int number)
+{
+ unsigned char tmp[6];
+ struct pnp_dev *dev;
+ u32 eisa_id;
+ char id[8];
+
+ isapnp_peek(tmp, size);
+ eisa_id = tmp[0] | tmp[1] << 8 | tmp[2] << 16 | tmp[3] << 24;
+ pnp_eisa_id_to_string(eisa_id, id);
+
+ dev = pnp_alloc_dev(&isapnp_protocol, number, id);
+ if (!dev)
+ return NULL;
+
+ dev->card = card;
+ dev->capabilities |= PNP_CONFIGURABLE;
+ dev->capabilities |= PNP_READ;
+ dev->capabilities |= PNP_WRITE;
+ dev->capabilities |= PNP_DISABLE;
+ pnp_init_resources(dev);
+ return dev;
+}
+
+/*
+ * Add IRQ resource to resources list.
+ */
+static void __init isapnp_parse_irq_resource(struct pnp_dev *dev,
+ unsigned int option_flags,
+ int size)
+{
+ unsigned char tmp[3];
+ unsigned long bits;
+ pnp_irq_mask_t map;
+ unsigned char flags = IORESOURCE_IRQ_HIGHEDGE;
+
+ isapnp_peek(tmp, size);
+ bits = (tmp[1] << 8) | tmp[0];
+
+ bitmap_zero(map.bits, PNP_IRQ_NR);
+ bitmap_copy(map.bits, &bits, 16);
+
+ if (size > 2)
+ flags = tmp[2];
+
+ pnp_register_irq_resource(dev, option_flags, &map, flags);
+}
+
+/*
+ * Add DMA resource to resources list.
+ */
+static void __init isapnp_parse_dma_resource(struct pnp_dev *dev,
+ unsigned int option_flags,
+ int size)
+{
+ unsigned char tmp[2];
+
+ isapnp_peek(tmp, size);
+ pnp_register_dma_resource(dev, option_flags, tmp[0], tmp[1]);
+}
+
+/*
+ * Add port resource to resources list.
+ */
+static void __init isapnp_parse_port_resource(struct pnp_dev *dev,
+ unsigned int option_flags,
+ int size)
+{
+ unsigned char tmp[7];
+ resource_size_t min, max, align, len;
+ unsigned char flags;
+
+ isapnp_peek(tmp, size);
+ min = (tmp[2] << 8) | tmp[1];
+ max = (tmp[4] << 8) | tmp[3];
+ align = tmp[5];
+ len = tmp[6];
+ flags = tmp[0] ? IORESOURCE_IO_16BIT_ADDR : 0;
+ pnp_register_port_resource(dev, option_flags,
+ min, max, align, len, flags);
+}
+
+/*
+ * Add fixed port resource to resources list.
+ */
+static void __init isapnp_parse_fixed_port_resource(struct pnp_dev *dev,
+ unsigned int option_flags,
+ int size)
+{
+ unsigned char tmp[3];
+ resource_size_t base, len;
+
+ isapnp_peek(tmp, size);
+ base = (tmp[1] << 8) | tmp[0];
+ len = tmp[2];
+ pnp_register_port_resource(dev, option_flags, base, base, 0, len,
+ IORESOURCE_IO_FIXED);
+}
+
+/*
+ * Add memory resource to resources list.
+ */
+static void __init isapnp_parse_mem_resource(struct pnp_dev *dev,
+ unsigned int option_flags,
+ int size)
+{
+ unsigned char tmp[9];
+ resource_size_t min, max, align, len;
+ unsigned char flags;
+
+ isapnp_peek(tmp, size);
+ min = ((tmp[2] << 8) | tmp[1]) << 8;
+ max = ((tmp[4] << 8) | tmp[3]) << 8;
+ align = (tmp[6] << 8) | tmp[5];
+ len = ((tmp[8] << 8) | tmp[7]) << 8;
+ flags = tmp[0];
+ pnp_register_mem_resource(dev, option_flags,
+ min, max, align, len, flags);
+}
+
+/*
+ * Add 32-bit memory resource to resources list.
+ */
+static void __init isapnp_parse_mem32_resource(struct pnp_dev *dev,
+ unsigned int option_flags,
+ int size)
+{
+ unsigned char tmp[17];
+ resource_size_t min, max, align, len;
+ unsigned char flags;
+
+ isapnp_peek(tmp, size);
+ min = (tmp[4] << 24) | (tmp[3] << 16) | (tmp[2] << 8) | tmp[1];
+ max = (tmp[8] << 24) | (tmp[7] << 16) | (tmp[6] << 8) | tmp[5];
+ align = (tmp[12] << 24) | (tmp[11] << 16) | (tmp[10] << 8) | tmp[9];
+ len = (tmp[16] << 24) | (tmp[15] << 16) | (tmp[14] << 8) | tmp[13];
+ flags = tmp[0];
+ pnp_register_mem_resource(dev, option_flags,
+ min, max, align, len, flags);
+}
+
+/*
+ * Add 32-bit fixed memory resource to resources list.
+ */
+static void __init isapnp_parse_fixed_mem32_resource(struct pnp_dev *dev,
+ unsigned int option_flags,
+ int size)
+{
+ unsigned char tmp[9];
+ resource_size_t base, len;
+ unsigned char flags;
+
+ isapnp_peek(tmp, size);
+ base = (tmp[4] << 24) | (tmp[3] << 16) | (tmp[2] << 8) | tmp[1];
+ len = (tmp[8] << 24) | (tmp[7] << 16) | (tmp[6] << 8) | tmp[5];
+ flags = tmp[0];
+ pnp_register_mem_resource(dev, option_flags, base, base, 0, len, flags);
+}
+
+/*
+ * Parse card name for ISA PnP device.
+ */
+static void __init
+isapnp_parse_name(char *name, unsigned int name_max, unsigned short *size)
+{
+ if (name[0] == '\0') {
+ unsigned short size1 =
+ *size >= name_max ? (name_max - 1) : *size;
+ isapnp_peek(name, size1);
+ name[size1] = '\0';
+ *size -= size1;
+
+ /* clean whitespace from end of string */
+ while (size1 > 0 && name[--size1] == ' ')
+ name[size1] = '\0';
+ }
+}
+
+/*
+ * Parse resource map for logical device.
+ */
+static int __init isapnp_create_device(struct pnp_card *card,
+ unsigned short size)
+{
+ int number = 0, skip = 0, priority, compat = 0;
+ unsigned char type, tmp[17];
+ unsigned int option_flags;
+ struct pnp_dev *dev;
+ u32 eisa_id;
+ char id[8];
+
+ if ((dev = isapnp_parse_device(card, size, number++)) == NULL)
+ return 1;
+ option_flags = 0;
+ pnp_add_card_device(card, dev);
+
+ while (1) {
+ if (isapnp_read_tag(&type, &size) < 0)
+ return 1;
+ if (skip && type != _STAG_LOGDEVID && type != _STAG_END)
+ goto __skip;
+ switch (type) {
+ case _STAG_LOGDEVID:
+ if (size >= 5 && size <= 6) {
+ if ((dev =
+ isapnp_parse_device(card, size,
+ number++)) == NULL)
+ return 1;
+ size = 0;
+ skip = 0;
+ option_flags = 0;
+ pnp_add_card_device(card, dev);
+ } else {
+ skip = 1;
+ }
+ compat = 0;
+ break;
+ case _STAG_COMPATDEVID:
+ if (size == 4 && compat < DEVICE_COUNT_COMPATIBLE) {
+ isapnp_peek(tmp, 4);
+ eisa_id = tmp[0] | tmp[1] << 8 |
+ tmp[2] << 16 | tmp[3] << 24;
+ pnp_eisa_id_to_string(eisa_id, id);
+ pnp_add_id(dev, id);
+ compat++;
+ size = 0;
+ }
+ break;
+ case _STAG_IRQ:
+ if (size < 2 || size > 3)
+ goto __skip;
+ isapnp_parse_irq_resource(dev, option_flags, size);
+ size = 0;
+ break;
+ case _STAG_DMA:
+ if (size != 2)
+ goto __skip;
+ isapnp_parse_dma_resource(dev, option_flags, size);
+ size = 0;
+ break;
+ case _STAG_STARTDEP:
+ if (size > 1)
+ goto __skip;
+ priority = PNP_RES_PRIORITY_ACCEPTABLE;
+ if (size > 0) {
+ isapnp_peek(tmp, size);
+ priority = tmp[0];
+ size = 0;
+ }
+ option_flags = pnp_new_dependent_set(dev, priority);
+ break;
+ case _STAG_ENDDEP:
+ if (size != 0)
+ goto __skip;
+ option_flags = 0;
+ break;
+ case _STAG_IOPORT:
+ if (size != 7)
+ goto __skip;
+ isapnp_parse_port_resource(dev, option_flags, size);
+ size = 0;
+ break;
+ case _STAG_FIXEDIO:
+ if (size != 3)
+ goto __skip;
+ isapnp_parse_fixed_port_resource(dev, option_flags,
+ size);
+ size = 0;
+ break;
+ case _STAG_VENDOR:
+ break;
+ case _LTAG_MEMRANGE:
+ if (size != 9)
+ goto __skip;
+ isapnp_parse_mem_resource(dev, option_flags, size);
+ size = 0;
+ break;
+ case _LTAG_ANSISTR:
+ isapnp_parse_name(dev->name, sizeof(dev->name), &size);
+ break;
+ case _LTAG_UNICODESTR:
+ /* silently ignore */
+ /* who use unicode for hardware identification? */
+ break;
+ case _LTAG_VENDOR:
+ break;
+ case _LTAG_MEM32RANGE:
+ if (size != 17)
+ goto __skip;
+ isapnp_parse_mem32_resource(dev, option_flags, size);
+ size = 0;
+ break;
+ case _LTAG_FIXEDMEM32RANGE:
+ if (size != 9)
+ goto __skip;
+ isapnp_parse_fixed_mem32_resource(dev, option_flags,
+ size);
+ size = 0;
+ break;
+ case _STAG_END:
+ if (size > 0)
+ isapnp_skip_bytes(size);
+ return 1;
+ default:
+ dev_err(&dev->dev, "unknown tag %#x (card %i), "
+ "ignored\n", type, card->number);
+ }
+__skip:
+ if (size > 0)
+ isapnp_skip_bytes(size);
+ }
+ return 0;
+}
+
+/*
+ * Parse resource map for ISA PnP card.
+ */
+static void __init isapnp_parse_resource_map(struct pnp_card *card)
+{
+ unsigned char type, tmp[17];
+ unsigned short size;
+
+ while (1) {
+ if (isapnp_read_tag(&type, &size) < 0)
+ return;
+ switch (type) {
+ case _STAG_PNPVERNO:
+ if (size != 2)
+ goto __skip;
+ isapnp_peek(tmp, 2);
+ card->pnpver = tmp[0];
+ card->productver = tmp[1];
+ size = 0;
+ break;
+ case _STAG_LOGDEVID:
+ if (size >= 5 && size <= 6) {
+ if (isapnp_create_device(card, size) == 1)
+ return;
+ size = 0;
+ }
+ break;
+ case _STAG_VENDOR:
+ break;
+ case _LTAG_ANSISTR:
+ isapnp_parse_name(card->name, sizeof(card->name),
+ &size);
+ break;
+ case _LTAG_UNICODESTR:
+ /* silently ignore */
+ /* who use unicode for hardware identification? */
+ break;
+ case _LTAG_VENDOR:
+ break;
+ case _STAG_END:
+ if (size > 0)
+ isapnp_skip_bytes(size);
+ return;
+ default:
+ dev_err(&card->dev, "unknown tag %#x, ignored\n",
+ type);
+ }
+__skip:
+ if (size > 0)
+ isapnp_skip_bytes(size);
+ }
+}
+
+/*
+ * Compute ISA PnP checksum for first eight bytes.
+ */
+static unsigned char __init isapnp_checksum(unsigned char *data)
+{
+ int i, j;
+ unsigned char checksum = 0x6a, bit, b;
+
+ for (i = 0; i < 8; i++) {
+ b = data[i];
+ for (j = 0; j < 8; j++) {
+ bit = 0;
+ if (b & (1 << j))
+ bit = 1;
+ checksum =
+ ((((checksum ^ (checksum >> 1)) & 0x01) ^ bit) << 7)
+ | (checksum >> 1);
+ }
+ }
+ return checksum;
+}
+
+/*
+ * Build device list for all present ISA PnP devices.
+ */
+static int __init isapnp_build_device_list(void)
+{
+ int csn;
+ unsigned char header[9], checksum;
+ struct pnp_card *card;
+ u32 eisa_id;
+ char id[8];
+
+ isapnp_wait();
+ isapnp_key();
+ for (csn = 1; csn <= isapnp_csn_count; csn++) {
+ isapnp_wake(csn);
+ isapnp_peek(header, 9);
+ checksum = isapnp_checksum(header);
+ eisa_id = header[0] | header[1] << 8 |
+ header[2] << 16 | header[3] << 24;
+ pnp_eisa_id_to_string(eisa_id, id);
+ card = pnp_alloc_card(&isapnp_protocol, csn, id);
+ if (!card)
+ continue;
+
+ INIT_LIST_HEAD(&card->devices);
+ card->serial =
+ (header[7] << 24) | (header[6] << 16) | (header[5] << 8) |
+ header[4];
+ isapnp_checksum_value = 0x00;
+ isapnp_parse_resource_map(card);
+ if (isapnp_checksum_value != 0x00)
+ dev_err(&card->dev, "invalid checksum %#x\n",
+ isapnp_checksum_value);
+ card->checksum = isapnp_checksum_value;
+
+ pnp_add_card(card);
+ }
+ isapnp_wait();
+ return 0;
+}
+
+/*
+ * Basic configuration routines.
+ */
+
+int isapnp_present(void)
+{
+ struct pnp_card *card;
+
+ pnp_for_each_card(card) {
+ if (card->protocol == &isapnp_protocol)
+ return 1;
+ }
+ return 0;
+}
+
+int isapnp_cfg_begin(int csn, int logdev)
+{
+ if (csn < 1 || csn > isapnp_csn_count || logdev > 10)
+ return -EINVAL;
+ mutex_lock(&isapnp_cfg_mutex);
+ isapnp_wait();
+ isapnp_key();
+ isapnp_wake(csn);
+#if 0
+ /* to avoid malfunction when the isapnptools package is used */
+ /* we must set RDP to our value again */
+ /* it is possible to set RDP only in the isolation phase */
+ /* Jens Thoms Toerring <Jens.Toerring@physik.fu-berlin.de> */
+ isapnp_write_byte(0x02, 0x04); /* clear CSN of card */
+ mdelay(2); /* is this necessary? */
+ isapnp_wake(csn); /* bring card into sleep state */
+ isapnp_wake(0); /* bring card into isolation state */
+ isapnp_set_rdp(); /* reset the RDP port */
+ udelay(1000); /* delay 1000us */
+ isapnp_write_byte(0x06, csn); /* reset CSN to previous value */
+ udelay(250); /* is this necessary? */
+#endif
+ if (logdev >= 0)
+ isapnp_device(logdev);
+ return 0;
+}
+
+int isapnp_cfg_end(void)
+{
+ isapnp_wait();
+ mutex_unlock(&isapnp_cfg_mutex);
+ return 0;
+}
+
+/*
+ * Initialization.
+ */
+
+EXPORT_SYMBOL(isapnp_protocol);
+EXPORT_SYMBOL(isapnp_present);
+EXPORT_SYMBOL(isapnp_cfg_begin);
+EXPORT_SYMBOL(isapnp_cfg_end);
+EXPORT_SYMBOL(isapnp_write_byte);
+
+static int isapnp_get_resources(struct pnp_dev *dev)
+{
+ int i, ret;
+
+ pnp_dbg(&dev->dev, "get resources\n");
+ pnp_init_resources(dev);
+ isapnp_cfg_begin(dev->card->number, dev->number);
+ dev->active = isapnp_read_byte(ISAPNP_CFG_ACTIVATE);
+ if (!dev->active)
+ goto __end;
+
+ for (i = 0; i < ISAPNP_MAX_PORT; i++) {
+ ret = isapnp_read_word(ISAPNP_CFG_PORT + (i << 1));
+ pnp_add_io_resource(dev, ret, ret,
+ ret == 0 ? IORESOURCE_DISABLED : 0);
+ }
+ for (i = 0; i < ISAPNP_MAX_MEM; i++) {
+ ret = isapnp_read_word(ISAPNP_CFG_MEM + (i << 3)) << 8;
+ pnp_add_mem_resource(dev, ret, ret,
+ ret == 0 ? IORESOURCE_DISABLED : 0);
+ }
+ for (i = 0; i < ISAPNP_MAX_IRQ; i++) {
+ ret = isapnp_read_word(ISAPNP_CFG_IRQ + (i << 1)) >> 8;
+ pnp_add_irq_resource(dev, ret,
+ ret == 0 ? IORESOURCE_DISABLED : 0);
+ }
+ for (i = 0; i < ISAPNP_MAX_DMA; i++) {
+ ret = isapnp_read_byte(ISAPNP_CFG_DMA + i);
+ pnp_add_dma_resource(dev, ret,
+ ret == 4 ? IORESOURCE_DISABLED : 0);
+ }
+
+__end:
+ isapnp_cfg_end();
+ return 0;
+}
+
+static int isapnp_set_resources(struct pnp_dev *dev)
+{
+ struct resource *res;
+ int tmp;
+
+ pnp_dbg(&dev->dev, "set resources\n");
+ isapnp_cfg_begin(dev->card->number, dev->number);
+ dev->active = 1;
+ for (tmp = 0; tmp < ISAPNP_MAX_PORT; tmp++) {
+ res = pnp_get_resource(dev, IORESOURCE_IO, tmp);
+ if (pnp_resource_enabled(res)) {
+ pnp_dbg(&dev->dev, " set io %d to %#llx\n",
+ tmp, (unsigned long long) res->start);
+ isapnp_write_word(ISAPNP_CFG_PORT + (tmp << 1),
+ res->start);
+ }
+ }
+ for (tmp = 0; tmp < ISAPNP_MAX_IRQ; tmp++) {
+ res = pnp_get_resource(dev, IORESOURCE_IRQ, tmp);
+ if (pnp_resource_enabled(res)) {
+ int irq = res->start;
+ if (irq == 2)
+ irq = 9;
+ pnp_dbg(&dev->dev, " set irq %d to %d\n", tmp, irq);
+ isapnp_write_byte(ISAPNP_CFG_IRQ + (tmp << 1), irq);
+ }
+ }
+ for (tmp = 0; tmp < ISAPNP_MAX_DMA; tmp++) {
+ res = pnp_get_resource(dev, IORESOURCE_DMA, tmp);
+ if (pnp_resource_enabled(res)) {
+ pnp_dbg(&dev->dev, " set dma %d to %lld\n",
+ tmp, (unsigned long long) res->start);
+ isapnp_write_byte(ISAPNP_CFG_DMA + tmp, res->start);
+ }
+ }
+ for (tmp = 0; tmp < ISAPNP_MAX_MEM; tmp++) {
+ res = pnp_get_resource(dev, IORESOURCE_MEM, tmp);
+ if (pnp_resource_enabled(res)) {
+ pnp_dbg(&dev->dev, " set mem %d to %#llx\n",
+ tmp, (unsigned long long) res->start);
+ isapnp_write_word(ISAPNP_CFG_MEM + (tmp << 3),
+ (res->start >> 8) & 0xffff);
+ }
+ }
+ /* FIXME: We aren't handling 32bit mems properly here */
+ isapnp_activate(dev->number);
+ isapnp_cfg_end();
+ return 0;
+}
+
+static int isapnp_disable_resources(struct pnp_dev *dev)
+{
+ if (!dev->active)
+ return -EINVAL;
+ isapnp_cfg_begin(dev->card->number, dev->number);
+ isapnp_deactivate(dev->number);
+ dev->active = 0;
+ isapnp_cfg_end();
+ return 0;
+}
+
+struct pnp_protocol isapnp_protocol = {
+ .name = "ISA Plug and Play",
+ .get = isapnp_get_resources,
+ .set = isapnp_set_resources,
+ .disable = isapnp_disable_resources,
+};
+
+static int __init isapnp_init(void)
+{
+ int cards;
+ struct pnp_card *card;
+ struct pnp_dev *dev;
+
+ if (isapnp_disable) {
+ printk(KERN_INFO "isapnp: ISA Plug & Play support disabled\n");
+ return 0;
+ }
+#ifdef CONFIG_PPC
+ if (check_legacy_ioport(_PIDXR) || check_legacy_ioport(_PNPWRP))
+ return -EINVAL;
+#endif
+#ifdef ISAPNP_REGION_OK
+ if (!request_region(_PIDXR, 1, "isapnp index")) {
+ printk(KERN_ERR "isapnp: Index Register 0x%x already used\n",
+ _PIDXR);
+ return -EBUSY;
+ }
+#endif
+ if (!request_region(_PNPWRP, 1, "isapnp write")) {
+ printk(KERN_ERR
+ "isapnp: Write Data Register 0x%x already used\n",
+ _PNPWRP);
+#ifdef ISAPNP_REGION_OK
+ release_region(_PIDXR, 1);
+#endif
+ return -EBUSY;
+ }
+
+ if (pnp_register_protocol(&isapnp_protocol) < 0)
+ return -EBUSY;
+
+ /*
+ * Print a message. The existing ISAPnP code is hanging machines
+ * so let the user know where.
+ */
+
+ printk(KERN_INFO "isapnp: Scanning for PnP cards...\n");
+ if (isapnp_rdp >= 0x203 && isapnp_rdp <= 0x3ff) {
+ isapnp_rdp |= 3;
+ if (!request_region(isapnp_rdp, 1, "isapnp read")) {
+ printk(KERN_ERR
+ "isapnp: Read Data Register 0x%x already used\n",
+ isapnp_rdp);
+#ifdef ISAPNP_REGION_OK
+ release_region(_PIDXR, 1);
+#endif
+ release_region(_PNPWRP, 1);
+ return -EBUSY;
+ }
+ isapnp_set_rdp();
+ }
+ if (isapnp_rdp < 0x203 || isapnp_rdp > 0x3ff) {
+ cards = isapnp_isolate();
+ if (cards < 0 || (isapnp_rdp < 0x203 || isapnp_rdp > 0x3ff)) {
+#ifdef ISAPNP_REGION_OK
+ release_region(_PIDXR, 1);
+#endif
+ release_region(_PNPWRP, 1);
+ printk(KERN_INFO
+ "isapnp: No Plug & Play device found\n");
+ return 0;
+ }
+ request_region(isapnp_rdp, 1, "isapnp read");
+ }
+ isapnp_build_device_list();
+ cards = 0;
+
+ protocol_for_each_card(&isapnp_protocol, card) {
+ cards++;
+ if (isapnp_verbose) {
+ dev_info(&card->dev, "card '%s'\n",
+ card->name[0] ? card->name : "unknown");
+ if (isapnp_verbose < 2)
+ continue;
+ card_for_each_dev(card, dev) {
+ dev_info(&card->dev, "device '%s'\n",
+ dev->name[0] ? dev->name : "unknown");
+ }
+ }
+ }
+ if (cards)
+ printk(KERN_INFO
+ "isapnp: %i Plug & Play card%s detected total\n", cards,
+ cards > 1 ? "s" : "");
+ else
+ printk(KERN_INFO "isapnp: No Plug & Play card found\n");
+
+ isapnp_proc_init();
+ return 0;
+}
+
+device_initcall(isapnp_init);
+
+/* format is: noisapnp */
+
+static int __init isapnp_setup_disable(char *str)
+{
+ isapnp_disable = 1;
+ return 1;
+}
+
+__setup("noisapnp", isapnp_setup_disable);
+
+/* format is: isapnp=rdp,reset,skip_pci_scan,verbose */
+
+static int __init isapnp_setup_isapnp(char *str)
+{
+ (void)((get_option(&str, &isapnp_rdp) == 2) &&
+ (get_option(&str, &isapnp_reset) == 2) &&
+ (get_option(&str, &isapnp_verbose) == 2));
+ return 1;
+}
+
+__setup("isapnp=", isapnp_setup_isapnp);
diff --git a/drivers/pnp/isapnp/proc.c b/drivers/pnp/isapnp/proc.c
new file mode 100644
index 0000000..262285e
--- /dev/null
+++ b/drivers/pnp/isapnp/proc.c
@@ -0,0 +1,101 @@
+/*
+ * ISA Plug & Play support
+ * Copyright (c) by Jaroslav Kysela <perex@perex.cz>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
+ */
+
+#include <linux/module.h>
+#include <linux/isapnp.h>
+#include <linux/proc_fs.h>
+#include <linux/init.h>
+#include <linux/uaccess.h>
+
+extern struct pnp_protocol isapnp_protocol;
+
+static struct proc_dir_entry *isapnp_proc_bus_dir = NULL;
+
+static loff_t isapnp_proc_bus_lseek(struct file *file, loff_t off, int whence)
+{
+ return fixed_size_llseek(file, off, whence, 256);
+}
+
+static ssize_t isapnp_proc_bus_read(struct file *file, char __user * buf,
+ size_t nbytes, loff_t * ppos)
+{
+ struct pnp_dev *dev = PDE_DATA(file_inode(file));
+ int pos = *ppos;
+ int cnt, size = 256;
+
+ if (pos >= size)
+ return 0;
+ if (nbytes >= size)
+ nbytes = size;
+ if (pos + nbytes > size)
+ nbytes = size - pos;
+ cnt = nbytes;
+
+ if (!access_ok(VERIFY_WRITE, buf, cnt))
+ return -EINVAL;
+
+ isapnp_cfg_begin(dev->card->number, dev->number);
+ for (; pos < 256 && cnt > 0; pos++, buf++, cnt--) {
+ unsigned char val;
+ val = isapnp_read_byte(pos);
+ __put_user(val, buf);
+ }
+ isapnp_cfg_end();
+
+ *ppos = pos;
+ return nbytes;
+}
+
+static const struct file_operations isapnp_proc_bus_file_operations = {
+ .owner = THIS_MODULE,
+ .llseek = isapnp_proc_bus_lseek,
+ .read = isapnp_proc_bus_read,
+};
+
+static int isapnp_proc_attach_device(struct pnp_dev *dev)
+{
+ struct pnp_card *bus = dev->card;
+ struct proc_dir_entry *de, *e;
+ char name[16];
+
+ if (!(de = bus->procdir)) {
+ sprintf(name, "%02x", bus->number);
+ de = bus->procdir = proc_mkdir(name, isapnp_proc_bus_dir);
+ if (!de)
+ return -ENOMEM;
+ }
+ sprintf(name, "%02x", dev->number);
+ e = dev->procent = proc_create_data(name, S_IFREG | S_IRUGO, de,
+ &isapnp_proc_bus_file_operations, dev);
+ if (!e)
+ return -ENOMEM;
+ proc_set_size(e, 256);
+ return 0;
+}
+
+int __init isapnp_proc_init(void)
+{
+ struct pnp_dev *dev;
+
+ isapnp_proc_bus_dir = proc_mkdir("bus/isapnp", NULL);
+ protocol_for_each_dev(&isapnp_protocol, dev) {
+ isapnp_proc_attach_device(dev);
+ }
+ return 0;
+}
diff --git a/drivers/pnp/manager.c b/drivers/pnp/manager.c
new file mode 100644
index 0000000..1440555
--- /dev/null
+++ b/drivers/pnp/manager.c
@@ -0,0 +1,430 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * manager.c - Resource Management, Conflict Resolution, Activation and Disabling of Devices
+ *
+ * based on isapnp.c resource management (c) Jaroslav Kysela <perex@perex.cz>
+ * Copyright 2003 Adam Belay <ambx1@neo.rr.com>
+ * Copyright (C) 2008 Hewlett-Packard Development Company, L.P.
+ * Bjorn Helgaas <bjorn.helgaas@hp.com>
+ */
+
+#include <linux/errno.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/pnp.h>
+#include <linux/bitmap.h>
+#include <linux/mutex.h>
+#include "base.h"
+
+DEFINE_MUTEX(pnp_res_mutex);
+
+static struct resource *pnp_find_resource(struct pnp_dev *dev,
+ unsigned char rule,
+ unsigned long type,
+ unsigned int bar)
+{
+ struct resource *res = pnp_get_resource(dev, type, bar);
+
+ /* when the resource already exists, set its resource bits from rule */
+ if (res) {
+ res->flags &= ~IORESOURCE_BITS;
+ res->flags |= rule & IORESOURCE_BITS;
+ }
+
+ return res;
+}
+
+static int pnp_assign_port(struct pnp_dev *dev, struct pnp_port *rule, int idx)
+{
+ struct resource *res, local_res;
+
+ res = pnp_find_resource(dev, rule->flags, IORESOURCE_IO, idx);
+ if (res) {
+ pnp_dbg(&dev->dev, " io %d already set to %#llx-%#llx "
+ "flags %#lx\n", idx, (unsigned long long) res->start,
+ (unsigned long long) res->end, res->flags);
+ return 0;
+ }
+
+ res = &local_res;
+ res->flags = rule->flags | IORESOURCE_AUTO;
+ res->start = 0;
+ res->end = 0;
+
+ if (!rule->size) {
+ res->flags |= IORESOURCE_DISABLED;
+ pnp_dbg(&dev->dev, " io %d disabled\n", idx);
+ goto __add;
+ }
+
+ res->start = rule->min;
+ res->end = res->start + rule->size - 1;
+
+ while (!pnp_check_port(dev, res)) {
+ res->start += rule->align;
+ res->end = res->start + rule->size - 1;
+ if (res->start > rule->max || !rule->align) {
+ pnp_dbg(&dev->dev, " couldn't assign io %d "
+ "(min %#llx max %#llx)\n", idx,
+ (unsigned long long) rule->min,
+ (unsigned long long) rule->max);
+ return -EBUSY;
+ }
+ }
+
+__add:
+ pnp_add_io_resource(dev, res->start, res->end, res->flags);
+ return 0;
+}
+
+static int pnp_assign_mem(struct pnp_dev *dev, struct pnp_mem *rule, int idx)
+{
+ struct resource *res, local_res;
+
+ res = pnp_find_resource(dev, rule->flags, IORESOURCE_MEM, idx);
+ if (res) {
+ pnp_dbg(&dev->dev, " mem %d already set to %#llx-%#llx "
+ "flags %#lx\n", idx, (unsigned long long) res->start,
+ (unsigned long long) res->end, res->flags);
+ return 0;
+ }
+
+ res = &local_res;
+ res->flags = rule->flags | IORESOURCE_AUTO;
+ res->start = 0;
+ res->end = 0;
+
+ /* ??? rule->flags restricted to 8 bits, all tests bogus ??? */
+ if (!(rule->flags & IORESOURCE_MEM_WRITEABLE))
+ res->flags |= IORESOURCE_READONLY;
+ if (rule->flags & IORESOURCE_MEM_RANGELENGTH)
+ res->flags |= IORESOURCE_RANGELENGTH;
+ if (rule->flags & IORESOURCE_MEM_SHADOWABLE)
+ res->flags |= IORESOURCE_SHADOWABLE;
+
+ if (!rule->size) {
+ res->flags |= IORESOURCE_DISABLED;
+ pnp_dbg(&dev->dev, " mem %d disabled\n", idx);
+ goto __add;
+ }
+
+ res->start = rule->min;
+ res->end = res->start + rule->size - 1;
+
+ while (!pnp_check_mem(dev, res)) {
+ res->start += rule->align;
+ res->end = res->start + rule->size - 1;
+ if (res->start > rule->max || !rule->align) {
+ pnp_dbg(&dev->dev, " couldn't assign mem %d "
+ "(min %#llx max %#llx)\n", idx,
+ (unsigned long long) rule->min,
+ (unsigned long long) rule->max);
+ return -EBUSY;
+ }
+ }
+
+__add:
+ pnp_add_mem_resource(dev, res->start, res->end, res->flags);
+ return 0;
+}
+
+static int pnp_assign_irq(struct pnp_dev *dev, struct pnp_irq *rule, int idx)
+{
+ struct resource *res, local_res;
+ int i;
+
+ /* IRQ priority: this table is good for i386 */
+ static unsigned short xtab[16] = {
+ 5, 10, 11, 12, 9, 14, 15, 7, 3, 4, 13, 0, 1, 6, 8, 2
+ };
+
+ res = pnp_find_resource(dev, rule->flags, IORESOURCE_IRQ, idx);
+ if (res) {
+ pnp_dbg(&dev->dev, " irq %d already set to %d flags %#lx\n",
+ idx, (int) res->start, res->flags);
+ return 0;
+ }
+
+ res = &local_res;
+ res->flags = rule->flags | IORESOURCE_AUTO;
+ res->start = -1;
+ res->end = -1;
+
+ if (bitmap_empty(rule->map.bits, PNP_IRQ_NR)) {
+ res->flags |= IORESOURCE_DISABLED;
+ pnp_dbg(&dev->dev, " irq %d disabled\n", idx);
+ goto __add;
+ }
+
+ /* TBD: need check for >16 IRQ */
+ res->start = find_next_bit(rule->map.bits, PNP_IRQ_NR, 16);
+ if (res->start < PNP_IRQ_NR) {
+ res->end = res->start;
+ goto __add;
+ }
+ for (i = 0; i < 16; i++) {
+ if (test_bit(xtab[i], rule->map.bits)) {
+ res->start = res->end = xtab[i];
+ if (pnp_check_irq(dev, res))
+ goto __add;
+ }
+ }
+
+ if (rule->flags & IORESOURCE_IRQ_OPTIONAL) {
+ res->start = -1;
+ res->end = -1;
+ res->flags |= IORESOURCE_DISABLED;
+ pnp_dbg(&dev->dev, " irq %d disabled (optional)\n", idx);
+ goto __add;
+ }
+
+ pnp_dbg(&dev->dev, " couldn't assign irq %d\n", idx);
+ return -EBUSY;
+
+__add:
+ pnp_add_irq_resource(dev, res->start, res->flags);
+ return 0;
+}
+
+#ifdef CONFIG_ISA_DMA_API
+static int pnp_assign_dma(struct pnp_dev *dev, struct pnp_dma *rule, int idx)
+{
+ struct resource *res, local_res;
+ int i;
+
+ /* DMA priority: this table is good for i386 */
+ static unsigned short xtab[8] = {
+ 1, 3, 5, 6, 7, 0, 2, 4
+ };
+
+ res = pnp_find_resource(dev, rule->flags, IORESOURCE_DMA, idx);
+ if (res) {
+ pnp_dbg(&dev->dev, " dma %d already set to %d flags %#lx\n",
+ idx, (int) res->start, res->flags);
+ return 0;
+ }
+
+ res = &local_res;
+ res->flags = rule->flags | IORESOURCE_AUTO;
+ res->start = -1;
+ res->end = -1;
+
+ if (!rule->map) {
+ res->flags |= IORESOURCE_DISABLED;
+ pnp_dbg(&dev->dev, " dma %d disabled\n", idx);
+ goto __add;
+ }
+
+ for (i = 0; i < 8; i++) {
+ if (rule->map & (1 << xtab[i])) {
+ res->start = res->end = xtab[i];
+ if (pnp_check_dma(dev, res))
+ goto __add;
+ }
+ }
+
+ pnp_dbg(&dev->dev, " couldn't assign dma %d\n", idx);
+ return -EBUSY;
+
+__add:
+ pnp_add_dma_resource(dev, res->start, res->flags);
+ return 0;
+}
+#endif /* CONFIG_ISA_DMA_API */
+
+void pnp_init_resources(struct pnp_dev *dev)
+{
+ pnp_free_resources(dev);
+}
+
+static void pnp_clean_resource_table(struct pnp_dev *dev)
+{
+ struct pnp_resource *pnp_res, *tmp;
+
+ list_for_each_entry_safe(pnp_res, tmp, &dev->resources, list) {
+ if (pnp_res->res.flags & IORESOURCE_AUTO)
+ pnp_free_resource(pnp_res);
+ }
+}
+
+/**
+ * pnp_assign_resources - assigns resources to the device based on the specified dependent number
+ * @dev: pointer to the desired device
+ * @set: the dependent function number
+ */
+static int pnp_assign_resources(struct pnp_dev *dev, int set)
+{
+ struct pnp_option *option;
+ int nport = 0, nmem = 0, nirq = 0;
+ int ndma __maybe_unused = 0;
+ int ret = 0;
+
+ pnp_dbg(&dev->dev, "pnp_assign_resources, try dependent set %d\n", set);
+ mutex_lock(&pnp_res_mutex);
+ pnp_clean_resource_table(dev);
+
+ list_for_each_entry(option, &dev->options, list) {
+ if (pnp_option_is_dependent(option) &&
+ pnp_option_set(option) != set)
+ continue;
+
+ switch (option->type) {
+ case IORESOURCE_IO:
+ ret = pnp_assign_port(dev, &option->u.port, nport++);
+ break;
+ case IORESOURCE_MEM:
+ ret = pnp_assign_mem(dev, &option->u.mem, nmem++);
+ break;
+ case IORESOURCE_IRQ:
+ ret = pnp_assign_irq(dev, &option->u.irq, nirq++);
+ break;
+#ifdef CONFIG_ISA_DMA_API
+ case IORESOURCE_DMA:
+ ret = pnp_assign_dma(dev, &option->u.dma, ndma++);
+ break;
+#endif
+ default:
+ ret = -EINVAL;
+ break;
+ }
+ if (ret < 0)
+ break;
+ }
+
+ mutex_unlock(&pnp_res_mutex);
+ if (ret < 0) {
+ pnp_dbg(&dev->dev, "pnp_assign_resources failed (%d)\n", ret);
+ pnp_clean_resource_table(dev);
+ } else
+ dbg_pnp_show_resources(dev, "pnp_assign_resources succeeded");
+ return ret;
+}
+
+/**
+ * pnp_auto_config_dev - automatically assigns resources to a device
+ * @dev: pointer to the desired device
+ */
+int pnp_auto_config_dev(struct pnp_dev *dev)
+{
+ int i, ret;
+
+ if (!pnp_can_configure(dev)) {
+ pnp_dbg(&dev->dev, "configuration not supported\n");
+ return -ENODEV;
+ }
+
+ ret = pnp_assign_resources(dev, 0);
+ if (ret == 0)
+ return 0;
+
+ for (i = 1; i < dev->num_dependent_sets; i++) {
+ ret = pnp_assign_resources(dev, i);
+ if (ret == 0)
+ return 0;
+ }
+
+ dev_err(&dev->dev, "unable to assign resources\n");
+ return ret;
+}
+
+/**
+ * pnp_start_dev - low-level start of the PnP device
+ * @dev: pointer to the desired device
+ *
+ * assumes that resources have already been allocated
+ */
+int pnp_start_dev(struct pnp_dev *dev)
+{
+ if (!pnp_can_write(dev)) {
+ pnp_dbg(&dev->dev, "activation not supported\n");
+ return -EINVAL;
+ }
+
+ dbg_pnp_show_resources(dev, "pnp_start_dev");
+ if (dev->protocol->set(dev) < 0) {
+ dev_err(&dev->dev, "activation failed\n");
+ return -EIO;
+ }
+
+ dev_info(&dev->dev, "activated\n");
+ return 0;
+}
+
+/**
+ * pnp_stop_dev - low-level disable of the PnP device
+ * @dev: pointer to the desired device
+ *
+ * does not free resources
+ */
+int pnp_stop_dev(struct pnp_dev *dev)
+{
+ if (!pnp_can_disable(dev)) {
+ pnp_dbg(&dev->dev, "disabling not supported\n");
+ return -EINVAL;
+ }
+ if (dev->protocol->disable(dev) < 0) {
+ dev_err(&dev->dev, "disable failed\n");
+ return -EIO;
+ }
+
+ dev_info(&dev->dev, "disabled\n");
+ return 0;
+}
+
+/**
+ * pnp_activate_dev - activates a PnP device for use
+ * @dev: pointer to the desired device
+ *
+ * does not validate or set resources so be careful.
+ */
+int pnp_activate_dev(struct pnp_dev *dev)
+{
+ int error;
+
+ if (dev->active)
+ return 0;
+
+ /* ensure resources are allocated */
+ if (pnp_auto_config_dev(dev))
+ return -EBUSY;
+
+ error = pnp_start_dev(dev);
+ if (error)
+ return error;
+
+ dev->active = 1;
+ return 0;
+}
+
+/**
+ * pnp_disable_dev - disables device
+ * @dev: pointer to the desired device
+ *
+ * inform the correct pnp protocol so that resources can be used by other devices
+ */
+int pnp_disable_dev(struct pnp_dev *dev)
+{
+ int error;
+
+ if (!dev->active)
+ return 0;
+
+ error = pnp_stop_dev(dev);
+ if (error)
+ return error;
+
+ dev->active = 0;
+
+ /* release the resources so that other devices can use them */
+ mutex_lock(&pnp_res_mutex);
+ pnp_clean_resource_table(dev);
+ mutex_unlock(&pnp_res_mutex);
+
+ return 0;
+}
+
+EXPORT_SYMBOL(pnp_start_dev);
+EXPORT_SYMBOL(pnp_stop_dev);
+EXPORT_SYMBOL(pnp_activate_dev);
+EXPORT_SYMBOL(pnp_disable_dev);
diff --git a/drivers/pnp/pnpacpi/Kconfig b/drivers/pnp/pnpacpi/Kconfig
new file mode 100644
index 0000000..b04767c
--- /dev/null
+++ b/drivers/pnp/pnpacpi/Kconfig
@@ -0,0 +1,6 @@
+#
+# Plug and Play ACPI configuration
+#
+config PNPACPI
+ bool
+ default (PNP && ACPI)
diff --git a/drivers/pnp/pnpacpi/Makefile b/drivers/pnp/pnpacpi/Makefile
new file mode 100644
index 0000000..40c93da
--- /dev/null
+++ b/drivers/pnp/pnpacpi/Makefile
@@ -0,0 +1,6 @@
+#
+# Makefile for the kernel PNPACPI driver.
+#
+obj-y += pnp.o
+
+pnp-y := core.o rsparser.o
diff --git a/drivers/pnp/pnpacpi/core.c b/drivers/pnp/pnpacpi/core.c
new file mode 100644
index 0000000..3a4c1aa
--- /dev/null
+++ b/drivers/pnp/pnpacpi/core.c
@@ -0,0 +1,338 @@
+/*
+ * pnpacpi -- PnP ACPI driver
+ *
+ * Copyright (c) 2004 Matthieu Castet <castet.matthieu@free.fr>
+ * Copyright (c) 2004 Li Shaohua <shaohua.li@intel.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <linux/export.h>
+#include <linux/acpi.h>
+#include <linux/pnp.h>
+#include <linux/slab.h>
+#include <linux/mod_devicetable.h>
+
+#include "../base.h"
+#include "pnpacpi.h"
+
+static int num;
+
+/*
+ * Compatible Device IDs
+ */
+#define TEST_HEX(c) \
+ if (!(('0' <= (c) && (c) <= '9') || ('A' <= (c) && (c) <= 'F'))) \
+ return 0
+#define TEST_ALPHA(c) \
+ if (!('A' <= (c) && (c) <= 'Z')) \
+ return 0
+static int __init ispnpidacpi(const char *id)
+{
+ TEST_ALPHA(id[0]);
+ TEST_ALPHA(id[1]);
+ TEST_ALPHA(id[2]);
+ TEST_HEX(id[3]);
+ TEST_HEX(id[4]);
+ TEST_HEX(id[5]);
+ TEST_HEX(id[6]);
+ if (id[7] != '\0')
+ return 0;
+ return 1;
+}
+
+static int pnpacpi_get_resources(struct pnp_dev *dev)
+{
+ pnp_dbg(&dev->dev, "get resources\n");
+ return pnpacpi_parse_allocated_resource(dev);
+}
+
+static int pnpacpi_set_resources(struct pnp_dev *dev)
+{
+ struct acpi_device *acpi_dev;
+ acpi_handle handle;
+ int ret = 0;
+
+ pnp_dbg(&dev->dev, "set resources\n");
+
+ acpi_dev = ACPI_COMPANION(&dev->dev);
+ if (!acpi_dev) {
+ dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__);
+ return -ENODEV;
+ }
+
+ if (WARN_ON_ONCE(acpi_dev != dev->data))
+ dev->data = acpi_dev;
+
+ handle = acpi_dev->handle;
+ if (acpi_has_method(handle, METHOD_NAME__SRS)) {
+ struct acpi_buffer buffer;
+
+ ret = pnpacpi_build_resource_template(dev, &buffer);
+ if (ret)
+ return ret;
+
+ ret = pnpacpi_encode_resources(dev, &buffer);
+ if (!ret) {
+ acpi_status status;
+
+ status = acpi_set_current_resources(handle, &buffer);
+ if (ACPI_FAILURE(status))
+ ret = -EIO;
+ }
+ kfree(buffer.pointer);
+ }
+ if (!ret && acpi_device_power_manageable(acpi_dev))
+ ret = acpi_device_set_power(acpi_dev, ACPI_STATE_D0);
+
+ return ret;
+}
+
+static int pnpacpi_disable_resources(struct pnp_dev *dev)
+{
+ struct acpi_device *acpi_dev;
+ acpi_status status;
+
+ dev_dbg(&dev->dev, "disable resources\n");
+
+ acpi_dev = ACPI_COMPANION(&dev->dev);
+ if (!acpi_dev) {
+ dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__);
+ return 0;
+ }
+
+ /* acpi_unregister_gsi(pnp_irq(dev, 0)); */
+ if (acpi_device_power_manageable(acpi_dev))
+ acpi_device_set_power(acpi_dev, ACPI_STATE_D3_COLD);
+
+ /* continue even if acpi_device_set_power() fails */
+ status = acpi_evaluate_object(acpi_dev->handle, "_DIS", NULL, NULL);
+ if (ACPI_FAILURE(status) && status != AE_NOT_FOUND)
+ return -ENODEV;
+
+ return 0;
+}
+
+#ifdef CONFIG_ACPI_SLEEP
+static bool pnpacpi_can_wakeup(struct pnp_dev *dev)
+{
+ struct acpi_device *acpi_dev = ACPI_COMPANION(&dev->dev);
+
+ if (!acpi_dev) {
+ dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__);
+ return false;
+ }
+
+ return acpi_bus_can_wakeup(acpi_dev->handle);
+}
+
+static int pnpacpi_suspend(struct pnp_dev *dev, pm_message_t state)
+{
+ struct acpi_device *acpi_dev = ACPI_COMPANION(&dev->dev);
+ int error = 0;
+
+ if (!acpi_dev) {
+ dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__);
+ return 0;
+ }
+
+ if (device_can_wakeup(&dev->dev)) {
+ error = acpi_pm_set_device_wakeup(&dev->dev,
+ device_may_wakeup(&dev->dev));
+ if (error)
+ return error;
+ }
+
+ if (acpi_device_power_manageable(acpi_dev)) {
+ int power_state = acpi_pm_device_sleep_state(&dev->dev, NULL,
+ ACPI_STATE_D3_COLD);
+ if (power_state < 0)
+ power_state = (state.event == PM_EVENT_ON) ?
+ ACPI_STATE_D0 : ACPI_STATE_D3_COLD;
+
+ /*
+ * acpi_device_set_power() can fail (keyboard port can't be
+ * powered-down?), and in any case, our return value is ignored
+ * by pnp_bus_suspend(). Hence we don't revert the wakeup
+ * setting if the set_power fails.
+ */
+ error = acpi_device_set_power(acpi_dev, power_state);
+ }
+
+ return error;
+}
+
+static int pnpacpi_resume(struct pnp_dev *dev)
+{
+ struct acpi_device *acpi_dev = ACPI_COMPANION(&dev->dev);
+ int error = 0;
+
+ if (!acpi_dev) {
+ dev_dbg(&dev->dev, "ACPI device not found in %s!\n", __func__);
+ return -ENODEV;
+ }
+
+ if (device_may_wakeup(&dev->dev))
+ acpi_pm_set_device_wakeup(&dev->dev, false);
+
+ if (acpi_device_power_manageable(acpi_dev))
+ error = acpi_device_set_power(acpi_dev, ACPI_STATE_D0);
+
+ return error;
+}
+#endif
+
+struct pnp_protocol pnpacpi_protocol = {
+ .name = "Plug and Play ACPI",
+ .get = pnpacpi_get_resources,
+ .set = pnpacpi_set_resources,
+ .disable = pnpacpi_disable_resources,
+#ifdef CONFIG_ACPI_SLEEP
+ .can_wakeup = pnpacpi_can_wakeup,
+ .suspend = pnpacpi_suspend,
+ .resume = pnpacpi_resume,
+#endif
+};
+EXPORT_SYMBOL(pnpacpi_protocol);
+
+static const char *__init pnpacpi_get_id(struct acpi_device *device)
+{
+ struct acpi_hardware_id *id;
+
+ list_for_each_entry(id, &device->pnp.ids, list) {
+ if (ispnpidacpi(id->id))
+ return id->id;
+ }
+
+ return NULL;
+}
+
+static int __init pnpacpi_add_device(struct acpi_device *device)
+{
+ struct pnp_dev *dev;
+ const char *pnpid;
+ struct acpi_hardware_id *id;
+ int error;
+
+ /* Skip devices that are already bound */
+ if (device->physical_node_count)
+ return 0;
+
+ /*
+ * If a PnPacpi device is not present , the device
+ * driver should not be loaded.
+ */
+ if (!acpi_has_method(device->handle, "_CRS"))
+ return 0;
+
+ pnpid = pnpacpi_get_id(device);
+ if (!pnpid)
+ return 0;
+
+ if (!device->status.present)
+ return 0;
+
+ dev = pnp_alloc_dev(&pnpacpi_protocol, num, pnpid);
+ if (!dev)
+ return -ENOMEM;
+
+ ACPI_COMPANION_SET(&dev->dev, device);
+ dev->data = device;
+ /* .enabled means the device can decode the resources */
+ dev->active = device->status.enabled;
+ if (acpi_has_method(device->handle, "_SRS"))
+ dev->capabilities |= PNP_CONFIGURABLE;
+ dev->capabilities |= PNP_READ;
+ if (device->flags.dynamic_status && (dev->capabilities & PNP_CONFIGURABLE))
+ dev->capabilities |= PNP_WRITE;
+ if (device->flags.removable)
+ dev->capabilities |= PNP_REMOVABLE;
+ if (acpi_has_method(device->handle, "_DIS"))
+ dev->capabilities |= PNP_DISABLE;
+
+ if (strlen(acpi_device_name(device)))
+ strncpy(dev->name, acpi_device_name(device), sizeof(dev->name));
+ else
+ strncpy(dev->name, acpi_device_bid(device), sizeof(dev->name));
+
+ if (dev->active)
+ pnpacpi_parse_allocated_resource(dev);
+
+ if (dev->capabilities & PNP_CONFIGURABLE)
+ pnpacpi_parse_resource_option_data(dev);
+
+ list_for_each_entry(id, &device->pnp.ids, list) {
+ if (!strcmp(id->id, pnpid))
+ continue;
+ if (!ispnpidacpi(id->id))
+ continue;
+ pnp_add_id(dev, id->id);
+ }
+
+ /* clear out the damaged flags */
+ if (!dev->active)
+ pnp_init_resources(dev);
+
+ error = pnp_add_device(dev);
+ if (error) {
+ put_device(&dev->dev);
+ return error;
+ }
+
+ num++;
+
+ return 0;
+}
+
+static acpi_status __init pnpacpi_add_device_handler(acpi_handle handle,
+ u32 lvl, void *context,
+ void **rv)
+{
+ struct acpi_device *device;
+
+ if (acpi_bus_get_device(handle, &device))
+ return AE_CTRL_DEPTH;
+ if (acpi_is_pnp_device(device))
+ pnpacpi_add_device(device);
+ return AE_OK;
+}
+
+int pnpacpi_disabled __initdata;
+static int __init pnpacpi_init(void)
+{
+ if (acpi_disabled || pnpacpi_disabled) {
+ printk(KERN_INFO "pnp: PnP ACPI: disabled\n");
+ return 0;
+ }
+ printk(KERN_INFO "pnp: PnP ACPI init\n");
+ pnp_register_protocol(&pnpacpi_protocol);
+ acpi_get_devices(NULL, pnpacpi_add_device_handler, NULL, NULL);
+ printk(KERN_INFO "pnp: PnP ACPI: found %d devices\n", num);
+ pnp_platform_devices = 1;
+ return 0;
+}
+
+fs_initcall(pnpacpi_init);
+
+static int __init pnpacpi_setup(char *str)
+{
+ if (str == NULL)
+ return 1;
+ if (!strncmp(str, "off", 3))
+ pnpacpi_disabled = 1;
+ return 1;
+}
+
+__setup("pnpacpi=", pnpacpi_setup);
diff --git a/drivers/pnp/pnpacpi/pnpacpi.h b/drivers/pnp/pnpacpi/pnpacpi.h
new file mode 100644
index 0000000..4489cd6
--- /dev/null
+++ b/drivers/pnp/pnpacpi/pnpacpi.h
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+#ifndef ACPI_PNP_H
+#define ACPI_PNP_H
+
+#include <linux/acpi.h>
+#include <linux/pnp.h>
+
+int pnpacpi_parse_allocated_resource(struct pnp_dev *);
+int pnpacpi_parse_resource_option_data(struct pnp_dev *);
+int pnpacpi_encode_resources(struct pnp_dev *, struct acpi_buffer *);
+int pnpacpi_build_resource_template(struct pnp_dev *, struct acpi_buffer *);
+#endif
diff --git a/drivers/pnp/pnpacpi/rsparser.c b/drivers/pnp/pnpacpi/rsparser.c
new file mode 100644
index 0000000..43d8ed5
--- /dev/null
+++ b/drivers/pnp/pnpacpi/rsparser.c
@@ -0,0 +1,956 @@
+/*
+ * pnpacpi -- PnP ACPI driver
+ *
+ * Copyright (c) 2004 Matthieu Castet <castet.matthieu@free.fr>
+ * Copyright (c) 2004 Li Shaohua <shaohua.li@intel.com>
+ * Copyright (C) 2008 Hewlett-Packard Development Company, L.P.
+ * Bjorn Helgaas <bjorn.helgaas@hp.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ */
+#include <linux/kernel.h>
+#include <linux/acpi.h>
+#include <linux/pci.h>
+#include <linux/pnp.h>
+#include <linux/slab.h>
+#include "../base.h"
+#include "pnpacpi.h"
+
+static void decode_irq_flags(struct pnp_dev *dev, int flags, u8 *triggering,
+ u8 *polarity, u8 *shareable)
+{
+ switch (flags & (IORESOURCE_IRQ_LOWLEVEL | IORESOURCE_IRQ_HIGHLEVEL |
+ IORESOURCE_IRQ_LOWEDGE | IORESOURCE_IRQ_HIGHEDGE)) {
+ case IORESOURCE_IRQ_LOWLEVEL:
+ *triggering = ACPI_LEVEL_SENSITIVE;
+ *polarity = ACPI_ACTIVE_LOW;
+ break;
+ case IORESOURCE_IRQ_HIGHLEVEL:
+ *triggering = ACPI_LEVEL_SENSITIVE;
+ *polarity = ACPI_ACTIVE_HIGH;
+ break;
+ case IORESOURCE_IRQ_LOWEDGE:
+ *triggering = ACPI_EDGE_SENSITIVE;
+ *polarity = ACPI_ACTIVE_LOW;
+ break;
+ case IORESOURCE_IRQ_HIGHEDGE:
+ *triggering = ACPI_EDGE_SENSITIVE;
+ *polarity = ACPI_ACTIVE_HIGH;
+ break;
+ default:
+ dev_err(&dev->dev, "can't encode invalid IRQ mode %#x\n",
+ flags);
+ *triggering = ACPI_EDGE_SENSITIVE;
+ *polarity = ACPI_ACTIVE_HIGH;
+ break;
+ }
+
+ if (flags & IORESOURCE_IRQ_SHAREABLE)
+ *shareable = ACPI_SHARED;
+ else
+ *shareable = ACPI_EXCLUSIVE;
+}
+
+static int dma_flags(struct pnp_dev *dev, int type, int bus_master,
+ int transfer)
+{
+ int flags = 0;
+
+ if (bus_master)
+ flags |= IORESOURCE_DMA_MASTER;
+ switch (type) {
+ case ACPI_COMPATIBILITY:
+ flags |= IORESOURCE_DMA_COMPATIBLE;
+ break;
+ case ACPI_TYPE_A:
+ flags |= IORESOURCE_DMA_TYPEA;
+ break;
+ case ACPI_TYPE_B:
+ flags |= IORESOURCE_DMA_TYPEB;
+ break;
+ case ACPI_TYPE_F:
+ flags |= IORESOURCE_DMA_TYPEF;
+ break;
+ default:
+ /* Set a default value ? */
+ flags |= IORESOURCE_DMA_COMPATIBLE;
+ dev_err(&dev->dev, "invalid DMA type %d\n", type);
+ }
+ switch (transfer) {
+ case ACPI_TRANSFER_8:
+ flags |= IORESOURCE_DMA_8BIT;
+ break;
+ case ACPI_TRANSFER_8_16:
+ flags |= IORESOURCE_DMA_8AND16BIT;
+ break;
+ case ACPI_TRANSFER_16:
+ flags |= IORESOURCE_DMA_16BIT;
+ break;
+ default:
+ /* Set a default value ? */
+ flags |= IORESOURCE_DMA_8AND16BIT;
+ dev_err(&dev->dev, "invalid DMA transfer type %d\n", transfer);
+ }
+
+ return flags;
+}
+
+/*
+ * Allocated Resources
+ */
+
+static void pnpacpi_add_irqresource(struct pnp_dev *dev, struct resource *r)
+{
+ if (!(r->flags & IORESOURCE_DISABLED))
+ pcibios_penalize_isa_irq(r->start, 1);
+
+ pnp_add_resource(dev, r);
+}
+
+/*
+ * Device CSRs that do not appear in PCI config space should be described
+ * via ACPI. This would normally be done with Address Space Descriptors
+ * marked as "consumer-only," but old versions of Windows and Linux ignore
+ * the producer/consumer flag, so HP invented a vendor-defined resource to
+ * describe the location and size of CSR space.
+ */
+static struct acpi_vendor_uuid hp_ccsr_uuid = {
+ .subtype = 2,
+ .data = { 0xf9, 0xad, 0xe9, 0x69, 0x4f, 0x92, 0x5f, 0xab, 0xf6, 0x4a,
+ 0x24, 0xd2, 0x01, 0x37, 0x0e, 0xad },
+};
+
+static int vendor_resource_matches(struct pnp_dev *dev,
+ struct acpi_resource_vendor_typed *vendor,
+ struct acpi_vendor_uuid *match,
+ int expected_len)
+{
+ int uuid_len = sizeof(vendor->uuid);
+ u8 uuid_subtype = vendor->uuid_subtype;
+ u8 *uuid = vendor->uuid;
+ int actual_len;
+
+ /* byte_length includes uuid_subtype and uuid */
+ actual_len = vendor->byte_length - uuid_len - 1;
+
+ if (uuid_subtype == match->subtype &&
+ uuid_len == sizeof(match->data) &&
+ memcmp(uuid, match->data, uuid_len) == 0) {
+ if (expected_len && expected_len != actual_len) {
+ dev_err(&dev->dev,
+ "wrong vendor descriptor size; expected %d, found %d bytes\n",
+ expected_len, actual_len);
+ return 0;
+ }
+
+ return 1;
+ }
+
+ return 0;
+}
+
+static void pnpacpi_parse_allocated_vendor(struct pnp_dev *dev,
+ struct acpi_resource_vendor_typed *vendor)
+{
+ if (vendor_resource_matches(dev, vendor, &hp_ccsr_uuid, 16)) {
+ u64 start, length;
+
+ memcpy(&start, vendor->byte_data, sizeof(start));
+ memcpy(&length, vendor->byte_data + 8, sizeof(length));
+
+ pnp_add_mem_resource(dev, start, start + length - 1, 0);
+ }
+}
+
+static acpi_status pnpacpi_allocated_resource(struct acpi_resource *res,
+ void *data)
+{
+ struct pnp_dev *dev = data;
+ struct acpi_resource_dma *dma;
+ struct acpi_resource_vendor_typed *vendor_typed;
+ struct acpi_resource_gpio *gpio;
+ struct resource_win win = {{0}, 0};
+ struct resource *r = &win.res;
+ int i, flags;
+
+ if (acpi_dev_resource_address_space(res, &win)
+ || acpi_dev_resource_ext_address_space(res, &win)) {
+ pnp_add_resource(dev, &win.res);
+ return AE_OK;
+ }
+
+ r->flags = 0;
+ if (acpi_dev_resource_interrupt(res, 0, r)) {
+ pnpacpi_add_irqresource(dev, r);
+ for (i = 1; acpi_dev_resource_interrupt(res, i, r); i++)
+ pnpacpi_add_irqresource(dev, r);
+
+ if (i > 1) {
+ /*
+ * The IRQ encoder puts a single interrupt in each
+ * descriptor, so if a _CRS descriptor has more than
+ * one interrupt, we won't be able to re-encode it.
+ */
+ if (pnp_can_write(dev)) {
+ dev_warn(&dev->dev,
+ "multiple interrupts in _CRS descriptor; configuration can't be changed\n");
+ dev->capabilities &= ~PNP_WRITE;
+ }
+ }
+ return AE_OK;
+ } else if (acpi_gpio_get_irq_resource(res, &gpio)) {
+ /*
+ * If the resource is GpioInt() type then extract the IRQ
+ * from GPIO resource and fill it into IRQ resource type.
+ */
+ i = acpi_dev_gpio_irq_get(dev->data, 0);
+ if (i >= 0) {
+ flags = acpi_dev_irq_flags(gpio->triggering,
+ gpio->polarity,
+ gpio->sharable);
+ } else {
+ flags = IORESOURCE_DISABLED;
+ }
+ pnp_add_irq_resource(dev, i, flags);
+ return AE_OK;
+ } else if (r->flags & IORESOURCE_DISABLED) {
+ pnp_add_irq_resource(dev, 0, IORESOURCE_DISABLED);
+ return AE_OK;
+ }
+
+ switch (res->type) {
+ case ACPI_RESOURCE_TYPE_MEMORY24:
+ case ACPI_RESOURCE_TYPE_MEMORY32:
+ case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
+ if (acpi_dev_resource_memory(res, r))
+ pnp_add_resource(dev, r);
+ break;
+ case ACPI_RESOURCE_TYPE_IO:
+ case ACPI_RESOURCE_TYPE_FIXED_IO:
+ if (acpi_dev_resource_io(res, r))
+ pnp_add_resource(dev, r);
+ break;
+ case ACPI_RESOURCE_TYPE_DMA:
+ dma = &res->data.dma;
+ if (dma->channel_count > 0 && dma->channels[0] != (u8) -1)
+ flags = dma_flags(dev, dma->type, dma->bus_master,
+ dma->transfer);
+ else
+ flags = IORESOURCE_DISABLED;
+ pnp_add_dma_resource(dev, dma->channels[0], flags);
+ break;
+
+ case ACPI_RESOURCE_TYPE_START_DEPENDENT:
+ case ACPI_RESOURCE_TYPE_END_DEPENDENT:
+ break;
+
+ case ACPI_RESOURCE_TYPE_VENDOR:
+ vendor_typed = &res->data.vendor_typed;
+ pnpacpi_parse_allocated_vendor(dev, vendor_typed);
+ break;
+
+ case ACPI_RESOURCE_TYPE_END_TAG:
+ break;
+
+ case ACPI_RESOURCE_TYPE_GENERIC_REGISTER:
+ break;
+
+ case ACPI_RESOURCE_TYPE_SERIAL_BUS:
+ /* serial bus connections (I2C/SPI/UART) are not pnp */
+ break;
+
+ default:
+ dev_warn(&dev->dev, "unknown resource type %d in _CRS\n",
+ res->type);
+ return AE_ERROR;
+ }
+
+ return AE_OK;
+}
+
+int pnpacpi_parse_allocated_resource(struct pnp_dev *dev)
+{
+ struct acpi_device *acpi_dev = dev->data;
+ acpi_handle handle = acpi_dev->handle;
+ acpi_status status;
+
+ pnp_dbg(&dev->dev, "parse allocated resources\n");
+
+ pnp_init_resources(dev);
+
+ status = acpi_walk_resources(handle, METHOD_NAME__CRS,
+ pnpacpi_allocated_resource, dev);
+
+ if (ACPI_FAILURE(status)) {
+ if (status != AE_NOT_FOUND)
+ dev_err(&dev->dev, "can't evaluate _CRS: %d", status);
+ return -EPERM;
+ }
+ return 0;
+}
+
+static __init void pnpacpi_parse_dma_option(struct pnp_dev *dev,
+ unsigned int option_flags,
+ struct acpi_resource_dma *p)
+{
+ int i;
+ unsigned char map = 0, flags;
+
+ for (i = 0; i < p->channel_count; i++)
+ map |= 1 << p->channels[i];
+
+ flags = dma_flags(dev, p->type, p->bus_master, p->transfer);
+ pnp_register_dma_resource(dev, option_flags, map, flags);
+}
+
+static __init void pnpacpi_parse_irq_option(struct pnp_dev *dev,
+ unsigned int option_flags,
+ struct acpi_resource_irq *p)
+{
+ int i;
+ pnp_irq_mask_t map;
+ unsigned char flags;
+
+ bitmap_zero(map.bits, PNP_IRQ_NR);
+ for (i = 0; i < p->interrupt_count; i++)
+ if (p->interrupts[i])
+ __set_bit(p->interrupts[i], map.bits);
+
+ flags = acpi_dev_irq_flags(p->triggering, p->polarity, p->sharable);
+ pnp_register_irq_resource(dev, option_flags, &map, flags);
+}
+
+static __init void pnpacpi_parse_ext_irq_option(struct pnp_dev *dev,
+ unsigned int option_flags,
+ struct acpi_resource_extended_irq *p)
+{
+ int i;
+ pnp_irq_mask_t map;
+ unsigned char flags;
+
+ bitmap_zero(map.bits, PNP_IRQ_NR);
+ for (i = 0; i < p->interrupt_count; i++) {
+ if (p->interrupts[i]) {
+ if (p->interrupts[i] < PNP_IRQ_NR)
+ __set_bit(p->interrupts[i], map.bits);
+ else
+ dev_err(&dev->dev,
+ "ignoring IRQ %d option (too large for %d entry bitmap)\n",
+ p->interrupts[i], PNP_IRQ_NR);
+ }
+ }
+
+ flags = acpi_dev_irq_flags(p->triggering, p->polarity, p->sharable);
+ pnp_register_irq_resource(dev, option_flags, &map, flags);
+}
+
+static __init void pnpacpi_parse_port_option(struct pnp_dev *dev,
+ unsigned int option_flags,
+ struct acpi_resource_io *io)
+{
+ unsigned char flags = 0;
+
+ if (io->io_decode == ACPI_DECODE_16)
+ flags = IORESOURCE_IO_16BIT_ADDR;
+ pnp_register_port_resource(dev, option_flags, io->minimum, io->maximum,
+ io->alignment, io->address_length, flags);
+}
+
+static __init void pnpacpi_parse_fixed_port_option(struct pnp_dev *dev,
+ unsigned int option_flags,
+ struct acpi_resource_fixed_io *io)
+{
+ pnp_register_port_resource(dev, option_flags, io->address, io->address,
+ 0, io->address_length, IORESOURCE_IO_FIXED);
+}
+
+static __init void pnpacpi_parse_mem24_option(struct pnp_dev *dev,
+ unsigned int option_flags,
+ struct acpi_resource_memory24 *p)
+{
+ unsigned char flags = 0;
+
+ if (p->write_protect == ACPI_READ_WRITE_MEMORY)
+ flags = IORESOURCE_MEM_WRITEABLE;
+ pnp_register_mem_resource(dev, option_flags, p->minimum, p->maximum,
+ p->alignment, p->address_length, flags);
+}
+
+static __init void pnpacpi_parse_mem32_option(struct pnp_dev *dev,
+ unsigned int option_flags,
+ struct acpi_resource_memory32 *p)
+{
+ unsigned char flags = 0;
+
+ if (p->write_protect == ACPI_READ_WRITE_MEMORY)
+ flags = IORESOURCE_MEM_WRITEABLE;
+ pnp_register_mem_resource(dev, option_flags, p->minimum, p->maximum,
+ p->alignment, p->address_length, flags);
+}
+
+static __init void pnpacpi_parse_fixed_mem32_option(struct pnp_dev *dev,
+ unsigned int option_flags,
+ struct acpi_resource_fixed_memory32 *p)
+{
+ unsigned char flags = 0;
+
+ if (p->write_protect == ACPI_READ_WRITE_MEMORY)
+ flags = IORESOURCE_MEM_WRITEABLE;
+ pnp_register_mem_resource(dev, option_flags, p->address, p->address,
+ 0, p->address_length, flags);
+}
+
+static __init void pnpacpi_parse_address_option(struct pnp_dev *dev,
+ unsigned int option_flags,
+ struct acpi_resource *r)
+{
+ struct acpi_resource_address64 addr, *p = &addr;
+ acpi_status status;
+ unsigned char flags = 0;
+
+ status = acpi_resource_to_address64(r, p);
+ if (ACPI_FAILURE(status)) {
+ dev_warn(&dev->dev, "can't convert resource type %d\n",
+ r->type);
+ return;
+ }
+
+ if (p->resource_type == ACPI_MEMORY_RANGE) {
+ if (p->info.mem.write_protect == ACPI_READ_WRITE_MEMORY)
+ flags = IORESOURCE_MEM_WRITEABLE;
+ pnp_register_mem_resource(dev, option_flags, p->address.minimum,
+ p->address.minimum, 0, p->address.address_length,
+ flags);
+ } else if (p->resource_type == ACPI_IO_RANGE)
+ pnp_register_port_resource(dev, option_flags, p->address.minimum,
+ p->address.minimum, 0, p->address.address_length,
+ IORESOURCE_IO_FIXED);
+}
+
+static __init void pnpacpi_parse_ext_address_option(struct pnp_dev *dev,
+ unsigned int option_flags,
+ struct acpi_resource *r)
+{
+ struct acpi_resource_extended_address64 *p = &r->data.ext_address64;
+ unsigned char flags = 0;
+
+ if (p->resource_type == ACPI_MEMORY_RANGE) {
+ if (p->info.mem.write_protect == ACPI_READ_WRITE_MEMORY)
+ flags = IORESOURCE_MEM_WRITEABLE;
+ pnp_register_mem_resource(dev, option_flags, p->address.minimum,
+ p->address.minimum, 0, p->address.address_length,
+ flags);
+ } else if (p->resource_type == ACPI_IO_RANGE)
+ pnp_register_port_resource(dev, option_flags, p->address.minimum,
+ p->address.minimum, 0, p->address.address_length,
+ IORESOURCE_IO_FIXED);
+}
+
+struct acpipnp_parse_option_s {
+ struct pnp_dev *dev;
+ unsigned int option_flags;
+};
+
+static __init acpi_status pnpacpi_option_resource(struct acpi_resource *res,
+ void *data)
+{
+ int priority;
+ struct acpipnp_parse_option_s *parse_data = data;
+ struct pnp_dev *dev = parse_data->dev;
+ unsigned int option_flags = parse_data->option_flags;
+
+ switch (res->type) {
+ case ACPI_RESOURCE_TYPE_IRQ:
+ pnpacpi_parse_irq_option(dev, option_flags, &res->data.irq);
+ break;
+
+ case ACPI_RESOURCE_TYPE_DMA:
+ pnpacpi_parse_dma_option(dev, option_flags, &res->data.dma);
+ break;
+
+ case ACPI_RESOURCE_TYPE_START_DEPENDENT:
+ switch (res->data.start_dpf.compatibility_priority) {
+ case ACPI_GOOD_CONFIGURATION:
+ priority = PNP_RES_PRIORITY_PREFERRED;
+ break;
+
+ case ACPI_ACCEPTABLE_CONFIGURATION:
+ priority = PNP_RES_PRIORITY_ACCEPTABLE;
+ break;
+
+ case ACPI_SUB_OPTIMAL_CONFIGURATION:
+ priority = PNP_RES_PRIORITY_FUNCTIONAL;
+ break;
+ default:
+ priority = PNP_RES_PRIORITY_INVALID;
+ break;
+ }
+ parse_data->option_flags = pnp_new_dependent_set(dev, priority);
+ break;
+
+ case ACPI_RESOURCE_TYPE_END_DEPENDENT:
+ parse_data->option_flags = 0;
+ break;
+
+ case ACPI_RESOURCE_TYPE_IO:
+ pnpacpi_parse_port_option(dev, option_flags, &res->data.io);
+ break;
+
+ case ACPI_RESOURCE_TYPE_FIXED_IO:
+ pnpacpi_parse_fixed_port_option(dev, option_flags,
+ &res->data.fixed_io);
+ break;
+
+ case ACPI_RESOURCE_TYPE_VENDOR:
+ case ACPI_RESOURCE_TYPE_END_TAG:
+ break;
+
+ case ACPI_RESOURCE_TYPE_MEMORY24:
+ pnpacpi_parse_mem24_option(dev, option_flags,
+ &res->data.memory24);
+ break;
+
+ case ACPI_RESOURCE_TYPE_MEMORY32:
+ pnpacpi_parse_mem32_option(dev, option_flags,
+ &res->data.memory32);
+ break;
+
+ case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
+ pnpacpi_parse_fixed_mem32_option(dev, option_flags,
+ &res->data.fixed_memory32);
+ break;
+
+ case ACPI_RESOURCE_TYPE_ADDRESS16:
+ case ACPI_RESOURCE_TYPE_ADDRESS32:
+ case ACPI_RESOURCE_TYPE_ADDRESS64:
+ pnpacpi_parse_address_option(dev, option_flags, res);
+ break;
+
+ case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
+ pnpacpi_parse_ext_address_option(dev, option_flags, res);
+ break;
+
+ case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
+ pnpacpi_parse_ext_irq_option(dev, option_flags,
+ &res->data.extended_irq);
+ break;
+
+ case ACPI_RESOURCE_TYPE_GENERIC_REGISTER:
+ break;
+
+ default:
+ dev_warn(&dev->dev, "unknown resource type %d in _PRS\n",
+ res->type);
+ return AE_ERROR;
+ }
+
+ return AE_OK;
+}
+
+int __init pnpacpi_parse_resource_option_data(struct pnp_dev *dev)
+{
+ struct acpi_device *acpi_dev = dev->data;
+ acpi_handle handle = acpi_dev->handle;
+ acpi_status status;
+ struct acpipnp_parse_option_s parse_data;
+
+ pnp_dbg(&dev->dev, "parse resource options\n");
+
+ parse_data.dev = dev;
+ parse_data.option_flags = 0;
+
+ status = acpi_walk_resources(handle, METHOD_NAME__PRS,
+ pnpacpi_option_resource, &parse_data);
+
+ if (ACPI_FAILURE(status)) {
+ if (status != AE_NOT_FOUND)
+ dev_err(&dev->dev, "can't evaluate _PRS: %d", status);
+ return -EPERM;
+ }
+ return 0;
+}
+
+static int pnpacpi_supported_resource(struct acpi_resource *res)
+{
+ switch (res->type) {
+ case ACPI_RESOURCE_TYPE_IRQ:
+ case ACPI_RESOURCE_TYPE_DMA:
+ case ACPI_RESOURCE_TYPE_IO:
+ case ACPI_RESOURCE_TYPE_FIXED_IO:
+ case ACPI_RESOURCE_TYPE_MEMORY24:
+ case ACPI_RESOURCE_TYPE_MEMORY32:
+ case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
+ case ACPI_RESOURCE_TYPE_ADDRESS16:
+ case ACPI_RESOURCE_TYPE_ADDRESS32:
+ case ACPI_RESOURCE_TYPE_ADDRESS64:
+ case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
+ case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
+ return 1;
+ }
+ return 0;
+}
+
+/*
+ * Set resource
+ */
+static acpi_status pnpacpi_count_resources(struct acpi_resource *res,
+ void *data)
+{
+ int *res_cnt = data;
+
+ if (pnpacpi_supported_resource(res))
+ (*res_cnt)++;
+ return AE_OK;
+}
+
+static acpi_status pnpacpi_type_resources(struct acpi_resource *res, void *data)
+{
+ struct acpi_resource **resource = data;
+
+ if (pnpacpi_supported_resource(res)) {
+ (*resource)->type = res->type;
+ (*resource)->length = sizeof(struct acpi_resource);
+ if (res->type == ACPI_RESOURCE_TYPE_IRQ)
+ (*resource)->data.irq.descriptor_length =
+ res->data.irq.descriptor_length;
+ (*resource)++;
+ }
+
+ return AE_OK;
+}
+
+int pnpacpi_build_resource_template(struct pnp_dev *dev,
+ struct acpi_buffer *buffer)
+{
+ struct acpi_device *acpi_dev = dev->data;
+ acpi_handle handle = acpi_dev->handle;
+ struct acpi_resource *resource;
+ int res_cnt = 0;
+ acpi_status status;
+
+ status = acpi_walk_resources(handle, METHOD_NAME__CRS,
+ pnpacpi_count_resources, &res_cnt);
+ if (ACPI_FAILURE(status)) {
+ dev_err(&dev->dev, "can't evaluate _CRS: %d\n", status);
+ return -EINVAL;
+ }
+ if (!res_cnt)
+ return -EINVAL;
+ buffer->length = sizeof(struct acpi_resource) * (res_cnt + 1) + 1;
+ buffer->pointer = kzalloc(buffer->length - 1, GFP_KERNEL);
+ if (!buffer->pointer)
+ return -ENOMEM;
+
+ resource = (struct acpi_resource *)buffer->pointer;
+ status = acpi_walk_resources(handle, METHOD_NAME__CRS,
+ pnpacpi_type_resources, &resource);
+ if (ACPI_FAILURE(status)) {
+ kfree(buffer->pointer);
+ dev_err(&dev->dev, "can't evaluate _CRS: %d\n", status);
+ return -EINVAL;
+ }
+ /* resource will pointer the end resource now */
+ resource->type = ACPI_RESOURCE_TYPE_END_TAG;
+ resource->length = sizeof(struct acpi_resource);
+
+ return 0;
+}
+
+static void pnpacpi_encode_irq(struct pnp_dev *dev,
+ struct acpi_resource *resource,
+ struct resource *p)
+{
+ struct acpi_resource_irq *irq = &resource->data.irq;
+ u8 triggering, polarity, shareable;
+
+ if (!pnp_resource_enabled(p)) {
+ irq->interrupt_count = 0;
+ pnp_dbg(&dev->dev, " encode irq (%s)\n",
+ p ? "disabled" : "missing");
+ return;
+ }
+
+ decode_irq_flags(dev, p->flags, &triggering, &polarity, &shareable);
+ irq->triggering = triggering;
+ irq->polarity = polarity;
+ irq->sharable = shareable;
+ irq->interrupt_count = 1;
+ irq->interrupts[0] = p->start;
+
+ pnp_dbg(&dev->dev, " encode irq %d %s %s %s (%d-byte descriptor)\n",
+ (int) p->start,
+ triggering == ACPI_LEVEL_SENSITIVE ? "level" : "edge",
+ polarity == ACPI_ACTIVE_LOW ? "low" : "high",
+ irq->sharable == ACPI_SHARED ? "shared" : "exclusive",
+ irq->descriptor_length);
+}
+
+static void pnpacpi_encode_ext_irq(struct pnp_dev *dev,
+ struct acpi_resource *resource,
+ struct resource *p)
+{
+ struct acpi_resource_extended_irq *extended_irq = &resource->data.extended_irq;
+ u8 triggering, polarity, shareable;
+
+ if (!pnp_resource_enabled(p)) {
+ extended_irq->interrupt_count = 0;
+ pnp_dbg(&dev->dev, " encode extended irq (%s)\n",
+ p ? "disabled" : "missing");
+ return;
+ }
+
+ decode_irq_flags(dev, p->flags, &triggering, &polarity, &shareable);
+ extended_irq->producer_consumer = ACPI_CONSUMER;
+ extended_irq->triggering = triggering;
+ extended_irq->polarity = polarity;
+ extended_irq->sharable = shareable;
+ extended_irq->interrupt_count = 1;
+ extended_irq->interrupts[0] = p->start;
+
+ pnp_dbg(&dev->dev, " encode irq %d %s %s %s\n", (int) p->start,
+ triggering == ACPI_LEVEL_SENSITIVE ? "level" : "edge",
+ polarity == ACPI_ACTIVE_LOW ? "low" : "high",
+ extended_irq->sharable == ACPI_SHARED ? "shared" : "exclusive");
+}
+
+static void pnpacpi_encode_dma(struct pnp_dev *dev,
+ struct acpi_resource *resource,
+ struct resource *p)
+{
+ struct acpi_resource_dma *dma = &resource->data.dma;
+
+ if (!pnp_resource_enabled(p)) {
+ dma->channel_count = 0;
+ pnp_dbg(&dev->dev, " encode dma (%s)\n",
+ p ? "disabled" : "missing");
+ return;
+ }
+
+ /* Note: pnp_assign_dma will copy pnp_dma->flags into p->flags */
+ switch (p->flags & IORESOURCE_DMA_SPEED_MASK) {
+ case IORESOURCE_DMA_TYPEA:
+ dma->type = ACPI_TYPE_A;
+ break;
+ case IORESOURCE_DMA_TYPEB:
+ dma->type = ACPI_TYPE_B;
+ break;
+ case IORESOURCE_DMA_TYPEF:
+ dma->type = ACPI_TYPE_F;
+ break;
+ default:
+ dma->type = ACPI_COMPATIBILITY;
+ }
+
+ switch (p->flags & IORESOURCE_DMA_TYPE_MASK) {
+ case IORESOURCE_DMA_8BIT:
+ dma->transfer = ACPI_TRANSFER_8;
+ break;
+ case IORESOURCE_DMA_8AND16BIT:
+ dma->transfer = ACPI_TRANSFER_8_16;
+ break;
+ default:
+ dma->transfer = ACPI_TRANSFER_16;
+ }
+
+ dma->bus_master = !!(p->flags & IORESOURCE_DMA_MASTER);
+ dma->channel_count = 1;
+ dma->channels[0] = p->start;
+
+ pnp_dbg(&dev->dev, " encode dma %d "
+ "type %#x transfer %#x master %d\n",
+ (int) p->start, dma->type, dma->transfer, dma->bus_master);
+}
+
+static void pnpacpi_encode_io(struct pnp_dev *dev,
+ struct acpi_resource *resource,
+ struct resource *p)
+{
+ struct acpi_resource_io *io = &resource->data.io;
+
+ if (pnp_resource_enabled(p)) {
+ /* Note: pnp_assign_port copies pnp_port->flags into p->flags */
+ io->io_decode = (p->flags & IORESOURCE_IO_16BIT_ADDR) ?
+ ACPI_DECODE_16 : ACPI_DECODE_10;
+ io->minimum = p->start;
+ io->maximum = p->end;
+ io->alignment = 0; /* Correct? */
+ io->address_length = resource_size(p);
+ } else {
+ io->minimum = 0;
+ io->address_length = 0;
+ }
+
+ pnp_dbg(&dev->dev, " encode io %#x-%#x decode %#x\n", io->minimum,
+ io->minimum + io->address_length - 1, io->io_decode);
+}
+
+static void pnpacpi_encode_fixed_io(struct pnp_dev *dev,
+ struct acpi_resource *resource,
+ struct resource *p)
+{
+ struct acpi_resource_fixed_io *fixed_io = &resource->data.fixed_io;
+
+ if (pnp_resource_enabled(p)) {
+ fixed_io->address = p->start;
+ fixed_io->address_length = resource_size(p);
+ } else {
+ fixed_io->address = 0;
+ fixed_io->address_length = 0;
+ }
+
+ pnp_dbg(&dev->dev, " encode fixed_io %#x-%#x\n", fixed_io->address,
+ fixed_io->address + fixed_io->address_length - 1);
+}
+
+static void pnpacpi_encode_mem24(struct pnp_dev *dev,
+ struct acpi_resource *resource,
+ struct resource *p)
+{
+ struct acpi_resource_memory24 *memory24 = &resource->data.memory24;
+
+ if (pnp_resource_enabled(p)) {
+ /* Note: pnp_assign_mem copies pnp_mem->flags into p->flags */
+ memory24->write_protect = p->flags & IORESOURCE_MEM_WRITEABLE ?
+ ACPI_READ_WRITE_MEMORY : ACPI_READ_ONLY_MEMORY;
+ memory24->minimum = p->start;
+ memory24->maximum = p->end;
+ memory24->alignment = 0;
+ memory24->address_length = resource_size(p);
+ } else {
+ memory24->minimum = 0;
+ memory24->address_length = 0;
+ }
+
+ pnp_dbg(&dev->dev, " encode mem24 %#x-%#x write_protect %#x\n",
+ memory24->minimum,
+ memory24->minimum + memory24->address_length - 1,
+ memory24->write_protect);
+}
+
+static void pnpacpi_encode_mem32(struct pnp_dev *dev,
+ struct acpi_resource *resource,
+ struct resource *p)
+{
+ struct acpi_resource_memory32 *memory32 = &resource->data.memory32;
+
+ if (pnp_resource_enabled(p)) {
+ memory32->write_protect = p->flags & IORESOURCE_MEM_WRITEABLE ?
+ ACPI_READ_WRITE_MEMORY : ACPI_READ_ONLY_MEMORY;
+ memory32->minimum = p->start;
+ memory32->maximum = p->end;
+ memory32->alignment = 0;
+ memory32->address_length = resource_size(p);
+ } else {
+ memory32->minimum = 0;
+ memory32->alignment = 0;
+ }
+
+ pnp_dbg(&dev->dev, " encode mem32 %#x-%#x write_protect %#x\n",
+ memory32->minimum,
+ memory32->minimum + memory32->address_length - 1,
+ memory32->write_protect);
+}
+
+static void pnpacpi_encode_fixed_mem32(struct pnp_dev *dev,
+ struct acpi_resource *resource,
+ struct resource *p)
+{
+ struct acpi_resource_fixed_memory32 *fixed_memory32 = &resource->data.fixed_memory32;
+
+ if (pnp_resource_enabled(p)) {
+ fixed_memory32->write_protect =
+ p->flags & IORESOURCE_MEM_WRITEABLE ?
+ ACPI_READ_WRITE_MEMORY : ACPI_READ_ONLY_MEMORY;
+ fixed_memory32->address = p->start;
+ fixed_memory32->address_length = resource_size(p);
+ } else {
+ fixed_memory32->address = 0;
+ fixed_memory32->address_length = 0;
+ }
+
+ pnp_dbg(&dev->dev, " encode fixed_mem32 %#x-%#x write_protect %#x\n",
+ fixed_memory32->address,
+ fixed_memory32->address + fixed_memory32->address_length - 1,
+ fixed_memory32->write_protect);
+}
+
+int pnpacpi_encode_resources(struct pnp_dev *dev, struct acpi_buffer *buffer)
+{
+ int i = 0;
+ /* pnpacpi_build_resource_template allocates extra mem */
+ int res_cnt = (buffer->length - 1) / sizeof(struct acpi_resource) - 1;
+ struct acpi_resource *resource = buffer->pointer;
+ unsigned int port = 0, irq = 0, dma = 0, mem = 0;
+
+ pnp_dbg(&dev->dev, "encode %d resources\n", res_cnt);
+ while (i < res_cnt) {
+ switch (resource->type) {
+ case ACPI_RESOURCE_TYPE_IRQ:
+ pnpacpi_encode_irq(dev, resource,
+ pnp_get_resource(dev, IORESOURCE_IRQ, irq));
+ irq++;
+ break;
+
+ case ACPI_RESOURCE_TYPE_DMA:
+ pnpacpi_encode_dma(dev, resource,
+ pnp_get_resource(dev, IORESOURCE_DMA, dma));
+ dma++;
+ break;
+ case ACPI_RESOURCE_TYPE_IO:
+ pnpacpi_encode_io(dev, resource,
+ pnp_get_resource(dev, IORESOURCE_IO, port));
+ port++;
+ break;
+ case ACPI_RESOURCE_TYPE_FIXED_IO:
+ pnpacpi_encode_fixed_io(dev, resource,
+ pnp_get_resource(dev, IORESOURCE_IO, port));
+ port++;
+ break;
+ case ACPI_RESOURCE_TYPE_MEMORY24:
+ pnpacpi_encode_mem24(dev, resource,
+ pnp_get_resource(dev, IORESOURCE_MEM, mem));
+ mem++;
+ break;
+ case ACPI_RESOURCE_TYPE_MEMORY32:
+ pnpacpi_encode_mem32(dev, resource,
+ pnp_get_resource(dev, IORESOURCE_MEM, mem));
+ mem++;
+ break;
+ case ACPI_RESOURCE_TYPE_FIXED_MEMORY32:
+ pnpacpi_encode_fixed_mem32(dev, resource,
+ pnp_get_resource(dev, IORESOURCE_MEM, mem));
+ mem++;
+ break;
+ case ACPI_RESOURCE_TYPE_EXTENDED_IRQ:
+ pnpacpi_encode_ext_irq(dev, resource,
+ pnp_get_resource(dev, IORESOURCE_IRQ, irq));
+ irq++;
+ break;
+ case ACPI_RESOURCE_TYPE_START_DEPENDENT:
+ case ACPI_RESOURCE_TYPE_END_DEPENDENT:
+ case ACPI_RESOURCE_TYPE_VENDOR:
+ case ACPI_RESOURCE_TYPE_END_TAG:
+ case ACPI_RESOURCE_TYPE_ADDRESS16:
+ case ACPI_RESOURCE_TYPE_ADDRESS32:
+ case ACPI_RESOURCE_TYPE_ADDRESS64:
+ case ACPI_RESOURCE_TYPE_EXTENDED_ADDRESS64:
+ case ACPI_RESOURCE_TYPE_GENERIC_REGISTER:
+ default: /* other type */
+ dev_warn(&dev->dev,
+ "can't encode unknown resource type %d\n",
+ resource->type);
+ return -EINVAL;
+ }
+ resource++;
+ i++;
+ }
+ return 0;
+}
diff --git a/drivers/pnp/pnpbios/Kconfig b/drivers/pnp/pnpbios/Kconfig
new file mode 100644
index 0000000..a786086
--- /dev/null
+++ b/drivers/pnp/pnpbios/Kconfig
@@ -0,0 +1,42 @@
+#
+# Plug and Play BIOS configuration
+#
+config PNPBIOS
+ bool "Plug and Play BIOS support"
+ depends on ISA && X86_32
+ default n
+ ---help---
+ Linux uses the PNPBIOS as defined in "Plug and Play BIOS
+ Specification Version 1.0A May 5, 1994" to autodetect built-in
+ mainboard resources (e.g. parallel port resources).
+
+ Some features (e.g. event notification, docking station information,
+ ISAPNP services) are not currently implemented.
+
+ If you would like the kernel to detect and allocate resources to
+ your mainboard devices (on some systems they are disabled by the
+ BIOS) say Y here. Also the PNPBIOS can help prevent resource
+ conflicts between mainboard devices and other bus devices.
+
+ Note: ACPI is expected to supersede PNPBIOS some day, currently it
+ co-exists nicely. If you have a non-ISA system that supports ACPI,
+ you probably don't need PNPBIOS support.
+
+config PNPBIOS_PROC_FS
+ bool "Plug and Play BIOS /proc interface"
+ depends on PNPBIOS && PROC_FS
+ ---help---
+ If you say Y here and to "/proc file system support", you will be
+ able to directly access the PNPBIOS. This includes resource
+ allocation, ESCD, and other PNPBIOS services. Using this
+ interface is potentially dangerous because the PNPBIOS driver will
+ not be notified of any resource changes made by writing directly.
+ Also some buggy systems will fault when accessing certain features
+ in the PNPBIOS /proc interface (e.g. "boot" configs).
+
+ See the latest pcmcia-cs (stand-alone package) for a nice set of
+ PNPBIOS /proc interface tools (lspnp and setpnp).
+
+ Unless you are debugging or have other specific reasons, it is
+ recommended that you say N here.
+
diff --git a/drivers/pnp/pnpbios/Makefile b/drivers/pnp/pnpbios/Makefile
new file mode 100644
index 0000000..240b0ff
--- /dev/null
+++ b/drivers/pnp/pnpbios/Makefile
@@ -0,0 +1,8 @@
+#
+# Makefile for the kernel PNPBIOS driver.
+#
+obj-y := pnp.o
+
+pnp-y := core.o bioscalls.o rsparser.o
+
+pnp-$(CONFIG_PNPBIOS_PROC_FS) += proc.o
diff --git a/drivers/pnp/pnpbios/bioscalls.c b/drivers/pnp/pnpbios/bioscalls.c
new file mode 100644
index 0000000..ba5cfc3
--- /dev/null
+++ b/drivers/pnp/pnpbios/bioscalls.c
@@ -0,0 +1,491 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * bioscalls.c - the lowlevel layer of the PnPBIOS driver
+ */
+
+#include <linux/types.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/linkage.h>
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/pnp.h>
+#include <linux/mm.h>
+#include <linux/smp.h>
+#include <linux/kmod.h>
+#include <linux/completion.h>
+#include <linux/spinlock.h>
+
+#include <asm/page.h>
+#include <asm/desc.h>
+#include <asm/byteorder.h>
+
+#include "pnpbios.h"
+
+__visible struct {
+ u16 offset;
+ u16 segment;
+} pnp_bios_callpoint;
+
+/*
+ * These are some opcodes for a "static asmlinkage"
+ * As this code is *not* executed inside the linux kernel segment, but in a
+ * alias at offset 0, we need a far return that can not be compiled by
+ * default (please, prove me wrong! this is *really* ugly!)
+ * This is the only way to get the bios to return into the kernel code,
+ * because the bios code runs in 16 bit protected mode and therefore can only
+ * return to the caller if the call is within the first 64kB, and the linux
+ * kernel begins at offset 3GB...
+ */
+
+asmlinkage __visible void pnp_bios_callfunc(void);
+
+__asm__(".text \n"
+ __ALIGN_STR "\n"
+ ".globl pnp_bios_callfunc\n"
+ "pnp_bios_callfunc:\n"
+ " pushl %edx \n"
+ " pushl %ecx \n"
+ " pushl %ebx \n"
+ " pushl %eax \n"
+ " lcallw *pnp_bios_callpoint\n"
+ " addl $16, %esp \n"
+ " lret \n"
+ ".previous \n");
+
+#define Q2_SET_SEL(cpu, selname, address, size) \
+do { \
+ struct desc_struct *gdt = get_cpu_gdt_rw((cpu)); \
+ set_desc_base(&gdt[(selname) >> 3], (u32)(address)); \
+ set_desc_limit(&gdt[(selname) >> 3], (size) - 1); \
+} while(0)
+
+static struct desc_struct bad_bios_desc = GDT_ENTRY_INIT(0x4092,
+ (unsigned long)__va(0x400UL), PAGE_SIZE - 0x400 - 1);
+
+/*
+ * At some point we want to use this stack frame pointer to unwind
+ * after PnP BIOS oopses.
+ */
+
+__visible u32 pnp_bios_fault_esp;
+__visible u32 pnp_bios_fault_eip;
+__visible u32 pnp_bios_is_utter_crap = 0;
+
+static spinlock_t pnp_bios_lock;
+
+/*
+ * Support Functions
+ */
+
+static inline u16 call_pnp_bios(u16 func, u16 arg1, u16 arg2, u16 arg3,
+ u16 arg4, u16 arg5, u16 arg6, u16 arg7,
+ void *ts1_base, u32 ts1_size,
+ void *ts2_base, u32 ts2_size)
+{
+ unsigned long flags;
+ u16 status;
+ struct desc_struct save_desc_40;
+ int cpu;
+
+ /*
+ * PnP BIOSes are generally not terribly re-entrant.
+ * Also, don't rely on them to save everything correctly.
+ */
+ if (pnp_bios_is_utter_crap)
+ return PNP_FUNCTION_NOT_SUPPORTED;
+
+ cpu = get_cpu();
+ save_desc_40 = get_cpu_gdt_rw(cpu)[0x40 / 8];
+ get_cpu_gdt_rw(cpu)[0x40 / 8] = bad_bios_desc;
+
+ /* On some boxes IRQ's during PnP BIOS calls are deadly. */
+ spin_lock_irqsave(&pnp_bios_lock, flags);
+
+ /* The lock prevents us bouncing CPU here */
+ if (ts1_size)
+ Q2_SET_SEL(smp_processor_id(), PNP_TS1, ts1_base, ts1_size);
+ if (ts2_size)
+ Q2_SET_SEL(smp_processor_id(), PNP_TS2, ts2_base, ts2_size);
+
+ __asm__ __volatile__("pushl %%ebp\n\t"
+ "pushl %%edi\n\t"
+ "pushl %%esi\n\t"
+ "pushl %%ds\n\t"
+ "pushl %%es\n\t"
+ "pushl %%fs\n\t"
+ "pushl %%gs\n\t"
+ "pushfl\n\t"
+ "movl %%esp, pnp_bios_fault_esp\n\t"
+ "movl $1f, pnp_bios_fault_eip\n\t"
+ "lcall %5,%6\n\t"
+ "1:popfl\n\t"
+ "popl %%gs\n\t"
+ "popl %%fs\n\t"
+ "popl %%es\n\t"
+ "popl %%ds\n\t"
+ "popl %%esi\n\t"
+ "popl %%edi\n\t"
+ "popl %%ebp\n\t":"=a"(status)
+ :"0"((func) | (((u32) arg1) << 16)),
+ "b"((arg2) | (((u32) arg3) << 16)),
+ "c"((arg4) | (((u32) arg5) << 16)),
+ "d"((arg6) | (((u32) arg7) << 16)),
+ "i"(PNP_CS32), "i"(0)
+ :"memory");
+ spin_unlock_irqrestore(&pnp_bios_lock, flags);
+
+ get_cpu_gdt_rw(cpu)[0x40 / 8] = save_desc_40;
+ put_cpu();
+
+ /* If we get here and this is set then the PnP BIOS faulted on us. */
+ if (pnp_bios_is_utter_crap) {
+ printk(KERN_ERR
+ "PnPBIOS: Warning! Your PnP BIOS caused a fatal error. Attempting to continue\n");
+ printk(KERN_ERR
+ "PnPBIOS: You may need to reboot with the \"pnpbios=off\" option to operate stably\n");
+ printk(KERN_ERR
+ "PnPBIOS: Check with your vendor for an updated BIOS\n");
+ }
+
+ return status;
+}
+
+void pnpbios_print_status(const char *module, u16 status)
+{
+ switch (status) {
+ case PNP_SUCCESS:
+ printk(KERN_ERR "PnPBIOS: %s: function successful\n", module);
+ break;
+ case PNP_NOT_SET_STATICALLY:
+ printk(KERN_ERR "PnPBIOS: %s: unable to set static resources\n",
+ module);
+ break;
+ case PNP_UNKNOWN_FUNCTION:
+ printk(KERN_ERR "PnPBIOS: %s: invalid function number passed\n",
+ module);
+ break;
+ case PNP_FUNCTION_NOT_SUPPORTED:
+ printk(KERN_ERR
+ "PnPBIOS: %s: function not supported on this system\n",
+ module);
+ break;
+ case PNP_INVALID_HANDLE:
+ printk(KERN_ERR "PnPBIOS: %s: invalid handle\n", module);
+ break;
+ case PNP_BAD_PARAMETER:
+ printk(KERN_ERR "PnPBIOS: %s: invalid parameters were passed\n",
+ module);
+ break;
+ case PNP_SET_FAILED:
+ printk(KERN_ERR "PnPBIOS: %s: unable to set resources\n",
+ module);
+ break;
+ case PNP_EVENTS_NOT_PENDING:
+ printk(KERN_ERR "PnPBIOS: %s: no events are pending\n", module);
+ break;
+ case PNP_SYSTEM_NOT_DOCKED:
+ printk(KERN_ERR "PnPBIOS: %s: the system is not docked\n",
+ module);
+ break;
+ case PNP_NO_ISA_PNP_CARDS:
+ printk(KERN_ERR
+ "PnPBIOS: %s: no isapnp cards are installed on this system\n",
+ module);
+ break;
+ case PNP_UNABLE_TO_DETERMINE_DOCK_CAPABILITIES:
+ printk(KERN_ERR
+ "PnPBIOS: %s: cannot determine the capabilities of the docking station\n",
+ module);
+ break;
+ case PNP_CONFIG_CHANGE_FAILED_NO_BATTERY:
+ printk(KERN_ERR
+ "PnPBIOS: %s: unable to undock, the system does not have a battery\n",
+ module);
+ break;
+ case PNP_CONFIG_CHANGE_FAILED_RESOURCE_CONFLICT:
+ printk(KERN_ERR
+ "PnPBIOS: %s: could not dock due to resource conflicts\n",
+ module);
+ break;
+ case PNP_BUFFER_TOO_SMALL:
+ printk(KERN_ERR "PnPBIOS: %s: the buffer passed is too small\n",
+ module);
+ break;
+ case PNP_USE_ESCD_SUPPORT:
+ printk(KERN_ERR "PnPBIOS: %s: use ESCD instead\n", module);
+ break;
+ case PNP_MESSAGE_NOT_SUPPORTED:
+ printk(KERN_ERR "PnPBIOS: %s: the message is unsupported\n",
+ module);
+ break;
+ case PNP_HARDWARE_ERROR:
+ printk(KERN_ERR "PnPBIOS: %s: a hardware failure has occurred\n",
+ module);
+ break;
+ default:
+ printk(KERN_ERR "PnPBIOS: %s: unexpected status 0x%x\n", module,
+ status);
+ break;
+ }
+}
+
+/*
+ * PnP BIOS Low Level Calls
+ */
+
+#define PNP_GET_NUM_SYS_DEV_NODES 0x00
+#define PNP_GET_SYS_DEV_NODE 0x01
+#define PNP_SET_SYS_DEV_NODE 0x02
+#define PNP_GET_EVENT 0x03
+#define PNP_SEND_MESSAGE 0x04
+#define PNP_GET_DOCKING_STATION_INFORMATION 0x05
+#define PNP_SET_STATIC_ALLOCED_RES_INFO 0x09
+#define PNP_GET_STATIC_ALLOCED_RES_INFO 0x0a
+#define PNP_GET_APM_ID_TABLE 0x0b
+#define PNP_GET_PNP_ISA_CONFIG_STRUC 0x40
+#define PNP_GET_ESCD_INFO 0x41
+#define PNP_READ_ESCD 0x42
+#define PNP_WRITE_ESCD 0x43
+
+/*
+ * Call PnP BIOS with function 0x00, "get number of system device nodes"
+ */
+static int __pnp_bios_dev_node_info(struct pnp_dev_node_info *data)
+{
+ u16 status;
+
+ if (!pnp_bios_present())
+ return PNP_FUNCTION_NOT_SUPPORTED;
+ status = call_pnp_bios(PNP_GET_NUM_SYS_DEV_NODES, 0, PNP_TS1, 2,
+ PNP_TS1, PNP_DS, 0, 0, data,
+ sizeof(struct pnp_dev_node_info), NULL, 0);
+ data->no_nodes &= 0xff;
+ return status;
+}
+
+int pnp_bios_dev_node_info(struct pnp_dev_node_info *data)
+{
+ int status = __pnp_bios_dev_node_info(data);
+
+ if (status)
+ pnpbios_print_status("dev_node_info", status);
+ return status;
+}
+
+/*
+ * Note that some PnP BIOSes (e.g., on Sony Vaio laptops) die a horrible
+ * death if they are asked to access the "current" configuration.
+ * Therefore, if it's a matter of indifference, it's better to call
+ * get_dev_node() and set_dev_node() with boot=1 rather than with boot=0.
+ */
+
+/*
+ * Call PnP BIOS with function 0x01, "get system device node"
+ * Input: *nodenum = desired node,
+ * boot = whether to get nonvolatile boot (!=0)
+ * or volatile current (0) config
+ * Output: *nodenum=next node or 0xff if no more nodes
+ */
+static int __pnp_bios_get_dev_node(u8 *nodenum, char boot,
+ struct pnp_bios_node *data)
+{
+ u16 status;
+ u16 tmp_nodenum;
+
+ if (!pnp_bios_present())
+ return PNP_FUNCTION_NOT_SUPPORTED;
+ if (!boot && pnpbios_dont_use_current_config)
+ return PNP_FUNCTION_NOT_SUPPORTED;
+ tmp_nodenum = *nodenum;
+ status = call_pnp_bios(PNP_GET_SYS_DEV_NODE, 0, PNP_TS1, 0, PNP_TS2,
+ boot ? 2 : 1, PNP_DS, 0, &tmp_nodenum,
+ sizeof(tmp_nodenum), data, 65536);
+ *nodenum = tmp_nodenum;
+ return status;
+}
+
+int pnp_bios_get_dev_node(u8 *nodenum, char boot, struct pnp_bios_node *data)
+{
+ int status;
+
+ status = __pnp_bios_get_dev_node(nodenum, boot, data);
+ if (status)
+ pnpbios_print_status("get_dev_node", status);
+ return status;
+}
+
+/*
+ * Call PnP BIOS with function 0x02, "set system device node"
+ * Input: *nodenum = desired node,
+ * boot = whether to set nonvolatile boot (!=0)
+ * or volatile current (0) config
+ */
+static int __pnp_bios_set_dev_node(u8 nodenum, char boot,
+ struct pnp_bios_node *data)
+{
+ u16 status;
+
+ if (!pnp_bios_present())
+ return PNP_FUNCTION_NOT_SUPPORTED;
+ if (!boot && pnpbios_dont_use_current_config)
+ return PNP_FUNCTION_NOT_SUPPORTED;
+ status = call_pnp_bios(PNP_SET_SYS_DEV_NODE, nodenum, 0, PNP_TS1,
+ boot ? 2 : 1, PNP_DS, 0, 0, data, 65536, NULL,
+ 0);
+ return status;
+}
+
+int pnp_bios_set_dev_node(u8 nodenum, char boot, struct pnp_bios_node *data)
+{
+ int status;
+
+ status = __pnp_bios_set_dev_node(nodenum, boot, data);
+ if (status) {
+ pnpbios_print_status("set_dev_node", status);
+ return status;
+ }
+ if (!boot) { /* Update devlist */
+ status = pnp_bios_get_dev_node(&nodenum, boot, data);
+ if (status)
+ return status;
+ }
+ return status;
+}
+
+/*
+ * Call PnP BIOS with function 0x05, "get docking station information"
+ */
+int pnp_bios_dock_station_info(struct pnp_docking_station_info *data)
+{
+ u16 status;
+
+ if (!pnp_bios_present())
+ return PNP_FUNCTION_NOT_SUPPORTED;
+ status = call_pnp_bios(PNP_GET_DOCKING_STATION_INFORMATION, 0, PNP_TS1,
+ PNP_DS, 0, 0, 0, 0, data,
+ sizeof(struct pnp_docking_station_info), NULL,
+ 0);
+ return status;
+}
+
+/*
+ * Call PnP BIOS with function 0x0a, "get statically allocated resource
+ * information"
+ */
+static int __pnp_bios_get_stat_res(char *info)
+{
+ u16 status;
+
+ if (!pnp_bios_present())
+ return PNP_FUNCTION_NOT_SUPPORTED;
+ status = call_pnp_bios(PNP_GET_STATIC_ALLOCED_RES_INFO, 0, PNP_TS1,
+ PNP_DS, 0, 0, 0, 0, info, 65536, NULL, 0);
+ return status;
+}
+
+int pnp_bios_get_stat_res(char *info)
+{
+ int status;
+
+ status = __pnp_bios_get_stat_res(info);
+ if (status)
+ pnpbios_print_status("get_stat_res", status);
+ return status;
+}
+
+/*
+ * Call PnP BIOS with function 0x40, "get isa pnp configuration structure"
+ */
+static int __pnp_bios_isapnp_config(struct pnp_isa_config_struc *data)
+{
+ u16 status;
+
+ if (!pnp_bios_present())
+ return PNP_FUNCTION_NOT_SUPPORTED;
+ status = call_pnp_bios(PNP_GET_PNP_ISA_CONFIG_STRUC, 0, PNP_TS1, PNP_DS,
+ 0, 0, 0, 0, data,
+ sizeof(struct pnp_isa_config_struc), NULL, 0);
+ return status;
+}
+
+int pnp_bios_isapnp_config(struct pnp_isa_config_struc *data)
+{
+ int status;
+
+ status = __pnp_bios_isapnp_config(data);
+ if (status)
+ pnpbios_print_status("isapnp_config", status);
+ return status;
+}
+
+/*
+ * Call PnP BIOS with function 0x41, "get ESCD info"
+ */
+static int __pnp_bios_escd_info(struct escd_info_struc *data)
+{
+ u16 status;
+
+ if (!pnp_bios_present())
+ return ESCD_FUNCTION_NOT_SUPPORTED;
+ status = call_pnp_bios(PNP_GET_ESCD_INFO, 0, PNP_TS1, 2, PNP_TS1, 4,
+ PNP_TS1, PNP_DS, data,
+ sizeof(struct escd_info_struc), NULL, 0);
+ return status;
+}
+
+int pnp_bios_escd_info(struct escd_info_struc *data)
+{
+ int status;
+
+ status = __pnp_bios_escd_info(data);
+ if (status)
+ pnpbios_print_status("escd_info", status);
+ return status;
+}
+
+/*
+ * Call PnP BIOS function 0x42, "read ESCD"
+ * nvram_base is determined by calling escd_info
+ */
+static int __pnp_bios_read_escd(char *data, u32 nvram_base)
+{
+ u16 status;
+
+ if (!pnp_bios_present())
+ return ESCD_FUNCTION_NOT_SUPPORTED;
+ status = call_pnp_bios(PNP_READ_ESCD, 0, PNP_TS1, PNP_TS2, PNP_DS, 0, 0,
+ 0, data, 65536, __va(nvram_base), 65536);
+ return status;
+}
+
+int pnp_bios_read_escd(char *data, u32 nvram_base)
+{
+ int status;
+
+ status = __pnp_bios_read_escd(data, nvram_base);
+ if (status)
+ pnpbios_print_status("read_escd", status);
+ return status;
+}
+
+void pnpbios_calls_init(union pnp_bios_install_struct *header)
+{
+ int i;
+
+ spin_lock_init(&pnp_bios_lock);
+ pnp_bios_callpoint.offset = header->fields.pm16offset;
+ pnp_bios_callpoint.segment = PNP_CS16;
+
+ for_each_possible_cpu(i) {
+ struct desc_struct *gdt = get_cpu_gdt_rw(i);
+ if (!gdt)
+ continue;
+ set_desc_base(&gdt[GDT_ENTRY_PNPBIOS_CS32],
+ (unsigned long)&pnp_bios_callfunc);
+ set_desc_base(&gdt[GDT_ENTRY_PNPBIOS_CS16],
+ (unsigned long)__va(header->fields.pm16cseg));
+ set_desc_base(&gdt[GDT_ENTRY_PNPBIOS_DS],
+ (unsigned long)__va(header->fields.pm16dseg));
+ }
+}
diff --git a/drivers/pnp/pnpbios/core.c b/drivers/pnp/pnpbios/core.c
new file mode 100644
index 0000000..077f334
--- /dev/null
+++ b/drivers/pnp/pnpbios/core.c
@@ -0,0 +1,590 @@
+/*
+ * pnpbios -- PnP BIOS driver
+ *
+ * This driver provides access to Plug-'n'-Play services provided by
+ * the PnP BIOS firmware, described in the following documents:
+ * Plug and Play BIOS Specification, Version 1.0A, 5 May 1994
+ * Plug and Play BIOS Clarification Paper, 6 October 1994
+ * Compaq Computer Corporation, Phoenix Technologies Ltd., Intel Corp.
+ *
+ * Originally (C) 1998 Christian Schmidt <schmidt@digadd.de>
+ * Modifications (C) 1998 Tom Lees <tom@lpsg.demon.co.uk>
+ * Minor reorganizations by David Hinds <dahinds@users.sourceforge.net>
+ * Further modifications (C) 2001, 2002 by:
+ * Alan Cox <alan@redhat.com>
+ * Thomas Hood
+ * Brian Gerst <bgerst@didntduck.org>
+ *
+ * Ported to the PnP Layer and several additional improvements (C) 2002
+ * by Adam Belay <ambx1@neo.rr.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+/* Change Log
+ *
+ * Adam Belay - <ambx1@neo.rr.com> - March 16, 2003
+ * rev 1.01 Only call pnp_bios_dev_node_info once
+ * Added pnpbios_print_status
+ * Added several new error messages and info messages
+ * Added pnpbios_interface_attach_device
+ * integrated core and proc init system
+ * Introduced PNPMODE flags
+ * Removed some useless includes
+ */
+
+#include <linux/types.h>
+#include <linux/init.h>
+#include <linux/linkage.h>
+#include <linux/kernel.h>
+#include <linux/device.h>
+#include <linux/pnp.h>
+#include <linux/mm.h>
+#include <linux/smp.h>
+#include <linux/slab.h>
+#include <linux/completion.h>
+#include <linux/spinlock.h>
+#include <linux/dmi.h>
+#include <linux/delay.h>
+#include <linux/acpi.h>
+#include <linux/freezer.h>
+#include <linux/kmod.h>
+#include <linux/kthread.h>
+
+#include <asm/page.h>
+#include <asm/desc.h>
+#include <asm/byteorder.h>
+
+#include "../base.h"
+#include "pnpbios.h"
+
+/*
+ *
+ * PnP BIOS INTERFACE
+ *
+ */
+
+static union pnp_bios_install_struct *pnp_bios_install = NULL;
+
+int pnp_bios_present(void)
+{
+ return (pnp_bios_install != NULL);
+}
+
+struct pnp_dev_node_info node_info;
+
+/*
+ *
+ * DOCKING FUNCTIONS
+ *
+ */
+
+static struct completion unload_sem;
+
+/*
+ * (Much of this belongs in a shared routine somewhere)
+ */
+static int pnp_dock_event(int dock, struct pnp_docking_station_info *info)
+{
+ static char const sbin_pnpbios[] = "/sbin/pnpbios";
+ char *argv[3], **envp, *buf, *scratch;
+ int i = 0, value;
+
+ if (!(envp = kcalloc(20, sizeof(char *), GFP_KERNEL)))
+ return -ENOMEM;
+ if (!(buf = kzalloc(256, GFP_KERNEL))) {
+ kfree(envp);
+ return -ENOMEM;
+ }
+
+ /* FIXME: if there are actual users of this, it should be
+ * integrated into the driver core and use the usual infrastructure
+ * like sysfs and uevents
+ */
+ argv[0] = (char *)sbin_pnpbios;
+ argv[1] = "dock";
+ argv[2] = NULL;
+
+ /* minimal command environment */
+ envp[i++] = "HOME=/";
+ envp[i++] = "PATH=/sbin:/bin:/usr/sbin:/usr/bin";
+
+#ifdef DEBUG
+ /* hint that policy agent should enter no-stdout debug mode */
+ envp[i++] = "DEBUG=kernel";
+#endif
+ /* extensible set of named bus-specific parameters,
+ * supporting multiple driver selection algorithms.
+ */
+ scratch = buf;
+
+ /* action: add, remove */
+ envp[i++] = scratch;
+ scratch += sprintf(scratch, "ACTION=%s", dock ? "add" : "remove") + 1;
+
+ /* Report the ident for the dock */
+ envp[i++] = scratch;
+ scratch += sprintf(scratch, "DOCK=%x/%x/%x",
+ info->location_id, info->serial, info->capabilities);
+ envp[i] = NULL;
+
+ value = call_usermodehelper(sbin_pnpbios, argv, envp, UMH_WAIT_EXEC);
+ kfree(buf);
+ kfree(envp);
+ return 0;
+}
+
+/*
+ * Poll the PnP docking at regular intervals
+ */
+static int pnp_dock_thread(void *unused)
+{
+ static struct pnp_docking_station_info now;
+ int docked = -1, d = 0;
+
+ set_freezable();
+ while (1) {
+ int status;
+
+ /*
+ * Poll every 2 seconds
+ */
+ msleep_interruptible(2000);
+
+ if (try_to_freeze())
+ continue;
+
+ status = pnp_bios_dock_station_info(&now);
+
+ switch (status) {
+ /*
+ * No dock to manage
+ */
+ case PNP_FUNCTION_NOT_SUPPORTED:
+ complete_and_exit(&unload_sem, 0);
+ case PNP_SYSTEM_NOT_DOCKED:
+ d = 0;
+ break;
+ case PNP_SUCCESS:
+ d = 1;
+ break;
+ default:
+ pnpbios_print_status("pnp_dock_thread", status);
+ printk(KERN_WARNING "PnPBIOS: disabling dock monitoring.\n");
+ complete_and_exit(&unload_sem, 0);
+ }
+ if (d != docked) {
+ if (pnp_dock_event(d, &now) == 0) {
+ docked = d;
+#if 0
+ printk(KERN_INFO
+ "PnPBIOS: Docking station %stached\n",
+ docked ? "at" : "de");
+#endif
+ }
+ }
+ }
+ complete_and_exit(&unload_sem, 0);
+}
+
+static int pnpbios_get_resources(struct pnp_dev *dev)
+{
+ u8 nodenum = dev->number;
+ struct pnp_bios_node *node;
+
+ if (!pnpbios_is_dynamic(dev))
+ return -EPERM;
+
+ pnp_dbg(&dev->dev, "get resources\n");
+ node = kzalloc(node_info.max_node_size, GFP_KERNEL);
+ if (!node)
+ return -1;
+ if (pnp_bios_get_dev_node(&nodenum, (char)PNPMODE_DYNAMIC, node)) {
+ kfree(node);
+ return -ENODEV;
+ }
+ pnpbios_read_resources_from_node(dev, node);
+ dev->active = pnp_is_active(dev);
+ kfree(node);
+ return 0;
+}
+
+static int pnpbios_set_resources(struct pnp_dev *dev)
+{
+ u8 nodenum = dev->number;
+ struct pnp_bios_node *node;
+ int ret;
+
+ if (!pnpbios_is_dynamic(dev))
+ return -EPERM;
+
+ pnp_dbg(&dev->dev, "set resources\n");
+ node = kzalloc(node_info.max_node_size, GFP_KERNEL);
+ if (!node)
+ return -1;
+ if (pnp_bios_get_dev_node(&nodenum, (char)PNPMODE_DYNAMIC, node)) {
+ kfree(node);
+ return -ENODEV;
+ }
+ if (pnpbios_write_resources_to_node(dev, node) < 0) {
+ kfree(node);
+ return -1;
+ }
+ ret = pnp_bios_set_dev_node(node->handle, (char)PNPMODE_DYNAMIC, node);
+ kfree(node);
+ if (ret > 0)
+ ret = -1;
+ return ret;
+}
+
+static void pnpbios_zero_data_stream(struct pnp_bios_node *node)
+{
+ unsigned char *p = (char *)node->data;
+ unsigned char *end = (char *)(node->data + node->size);
+ unsigned int len;
+ int i;
+
+ while ((char *)p < (char *)end) {
+ if (p[0] & 0x80) { /* large tag */
+ len = (p[2] << 8) | p[1];
+ p += 3;
+ } else {
+ if (((p[0] >> 3) & 0x0f) == 0x0f)
+ return;
+ len = p[0] & 0x07;
+ p += 1;
+ }
+ for (i = 0; i < len; i++)
+ p[i] = 0;
+ p += len;
+ }
+ printk(KERN_ERR
+ "PnPBIOS: Resource structure did not contain an end tag.\n");
+}
+
+static int pnpbios_disable_resources(struct pnp_dev *dev)
+{
+ struct pnp_bios_node *node;
+ u8 nodenum = dev->number;
+ int ret;
+
+ if (dev->flags & PNPBIOS_NO_DISABLE || !pnpbios_is_dynamic(dev))
+ return -EPERM;
+
+ node = kzalloc(node_info.max_node_size, GFP_KERNEL);
+ if (!node)
+ return -ENOMEM;
+
+ if (pnp_bios_get_dev_node(&nodenum, (char)PNPMODE_DYNAMIC, node)) {
+ kfree(node);
+ return -ENODEV;
+ }
+ pnpbios_zero_data_stream(node);
+
+ ret = pnp_bios_set_dev_node(dev->number, (char)PNPMODE_DYNAMIC, node);
+ kfree(node);
+ if (ret > 0)
+ ret = -1;
+ return ret;
+}
+
+/* PnP Layer support */
+
+struct pnp_protocol pnpbios_protocol = {
+ .name = "Plug and Play BIOS",
+ .get = pnpbios_get_resources,
+ .set = pnpbios_set_resources,
+ .disable = pnpbios_disable_resources,
+};
+
+static int __init insert_device(struct pnp_bios_node *node)
+{
+ struct list_head *pos;
+ struct pnp_dev *dev;
+ char id[8];
+ int error;
+
+ /* check if the device is already added */
+ list_for_each(pos, &pnpbios_protocol.devices) {
+ dev = list_entry(pos, struct pnp_dev, protocol_list);
+ if (dev->number == node->handle)
+ return -EEXIST;
+ }
+
+ pnp_eisa_id_to_string(node->eisa_id & PNP_EISA_ID_MASK, id);
+ dev = pnp_alloc_dev(&pnpbios_protocol, node->handle, id);
+ if (!dev)
+ return -ENOMEM;
+
+ pnpbios_parse_data_stream(dev, node);
+ dev->active = pnp_is_active(dev);
+ dev->flags = node->flags;
+ if (!(dev->flags & PNPBIOS_NO_CONFIG))
+ dev->capabilities |= PNP_CONFIGURABLE;
+ if (!(dev->flags & PNPBIOS_NO_DISABLE) && pnpbios_is_dynamic(dev))
+ dev->capabilities |= PNP_DISABLE;
+ dev->capabilities |= PNP_READ;
+ if (pnpbios_is_dynamic(dev))
+ dev->capabilities |= PNP_WRITE;
+ if (dev->flags & PNPBIOS_REMOVABLE)
+ dev->capabilities |= PNP_REMOVABLE;
+
+ /* clear out the damaged flags */
+ if (!dev->active)
+ pnp_init_resources(dev);
+
+ error = pnp_add_device(dev);
+ if (error) {
+ put_device(&dev->dev);
+ return error;
+ }
+
+ pnpbios_interface_attach_device(node);
+
+ return 0;
+}
+
+static void __init build_devlist(void)
+{
+ u8 nodenum;
+ unsigned int nodes_got = 0;
+ unsigned int devs = 0;
+ struct pnp_bios_node *node;
+
+ node = kzalloc(node_info.max_node_size, GFP_KERNEL);
+ if (!node)
+ return;
+
+ for (nodenum = 0; nodenum < 0xff;) {
+ u8 thisnodenum = nodenum;
+ /* eventually we will want to use PNPMODE_STATIC here but for now
+ * dynamic will help us catch buggy bioses to add to the blacklist.
+ */
+ if (!pnpbios_dont_use_current_config) {
+ if (pnp_bios_get_dev_node
+ (&nodenum, (char)PNPMODE_DYNAMIC, node))
+ break;
+ } else {
+ if (pnp_bios_get_dev_node
+ (&nodenum, (char)PNPMODE_STATIC, node))
+ break;
+ }
+ nodes_got++;
+ if (insert_device(node) == 0)
+ devs++;
+ if (nodenum <= thisnodenum) {
+ printk(KERN_ERR
+ "PnPBIOS: build_devlist: Node number 0x%x is out of sequence following node 0x%x. Aborting.\n",
+ (unsigned int)nodenum,
+ (unsigned int)thisnodenum);
+ break;
+ }
+ }
+ kfree(node);
+
+ printk(KERN_INFO
+ "PnPBIOS: %i node%s reported by PnP BIOS; %i recorded by driver\n",
+ nodes_got, nodes_got != 1 ? "s" : "", devs);
+}
+
+/*
+ *
+ * INIT AND EXIT
+ *
+ */
+
+static int pnpbios_disabled;
+int pnpbios_dont_use_current_config;
+
+static int __init pnpbios_setup(char *str)
+{
+ int invert;
+
+ while ((str != NULL) && (*str != '\0')) {
+ if (strncmp(str, "off", 3) == 0)
+ pnpbios_disabled = 1;
+ if (strncmp(str, "on", 2) == 0)
+ pnpbios_disabled = 0;
+ invert = (strncmp(str, "no-", 3) == 0);
+ if (invert)
+ str += 3;
+ if (strncmp(str, "curr", 4) == 0)
+ pnpbios_dont_use_current_config = invert;
+ str = strchr(str, ',');
+ if (str != NULL)
+ str += strspn(str, ", \t");
+ }
+
+ return 1;
+}
+
+__setup("pnpbios=", pnpbios_setup);
+
+/* PnP BIOS signature: "$PnP" */
+#define PNP_SIGNATURE (('$' << 0) + ('P' << 8) + ('n' << 16) + ('P' << 24))
+
+static int __init pnpbios_probe_system(void)
+{
+ union pnp_bios_install_struct *check;
+ u8 sum;
+ int length, i;
+
+ printk(KERN_INFO "PnPBIOS: Scanning system for PnP BIOS support...\n");
+
+ /*
+ * Search the defined area (0xf0000-0xffff0) for a valid PnP BIOS
+ * structure and, if one is found, sets up the selectors and
+ * entry points
+ */
+ for (check = (union pnp_bios_install_struct *)__va(0xf0000);
+ check < (union pnp_bios_install_struct *)__va(0xffff0);
+ check = (void *)check + 16) {
+ if (check->fields.signature != PNP_SIGNATURE)
+ continue;
+ printk(KERN_INFO
+ "PnPBIOS: Found PnP BIOS installation structure at 0x%p\n",
+ check);
+ length = check->fields.length;
+ if (!length) {
+ printk(KERN_ERR
+ "PnPBIOS: installation structure is invalid, skipping\n");
+ continue;
+ }
+ for (sum = 0, i = 0; i < length; i++)
+ sum += check->chars[i];
+ if (sum) {
+ printk(KERN_ERR
+ "PnPBIOS: installation structure is corrupted, skipping\n");
+ continue;
+ }
+ if (check->fields.version < 0x10) {
+ printk(KERN_WARNING
+ "PnPBIOS: PnP BIOS version %d.%d is not supported\n",
+ check->fields.version >> 4,
+ check->fields.version & 15);
+ continue;
+ }
+ printk(KERN_INFO
+ "PnPBIOS: PnP BIOS version %d.%d, entry 0x%x:0x%x, dseg 0x%x\n",
+ check->fields.version >> 4, check->fields.version & 15,
+ check->fields.pm16cseg, check->fields.pm16offset,
+ check->fields.pm16dseg);
+ pnp_bios_install = check;
+ return 1;
+ }
+
+ printk(KERN_INFO "PnPBIOS: PnP BIOS support was not detected.\n");
+ return 0;
+}
+
+static int __init exploding_pnp_bios(const struct dmi_system_id *d)
+{
+ printk(KERN_WARNING "%s detected. Disabling PnPBIOS\n", d->ident);
+ return 0;
+}
+
+static const struct dmi_system_id pnpbios_dmi_table[] __initconst = {
+ { /* PnPBIOS GPF on boot */
+ .callback = exploding_pnp_bios,
+ .ident = "Higraded P14H",
+ .matches = {
+ DMI_MATCH(DMI_BIOS_VENDOR, "American Megatrends Inc."),
+ DMI_MATCH(DMI_BIOS_VERSION, "07.00T"),
+ DMI_MATCH(DMI_SYS_VENDOR, "Higraded"),
+ DMI_MATCH(DMI_PRODUCT_NAME, "P14H"),
+ },
+ },
+ { /* PnPBIOS GPF on boot */
+ .callback = exploding_pnp_bios,
+ .ident = "ASUS P4P800",
+ .matches = {
+ DMI_MATCH(DMI_BOARD_VENDOR, "ASUSTeK Computer Inc."),
+ DMI_MATCH(DMI_BOARD_NAME, "P4P800"),
+ },
+ },
+ {}
+};
+
+static int __init pnpbios_init(void)
+{
+ int ret;
+
+ if (pnpbios_disabled || dmi_check_system(pnpbios_dmi_table) ||
+ arch_pnpbios_disabled()) {
+ printk(KERN_INFO "PnPBIOS: Disabled\n");
+ return -ENODEV;
+ }
+
+#ifdef CONFIG_PNPACPI
+ if (!acpi_disabled && !pnpacpi_disabled) {
+ pnpbios_disabled = 1;
+ printk(KERN_INFO "PnPBIOS: Disabled by ACPI PNP\n");
+ return -ENODEV;
+ }
+#endif /* CONFIG_ACPI */
+
+ /* scan the system for pnpbios support */
+ if (!pnpbios_probe_system())
+ return -ENODEV;
+
+ /* make preparations for bios calls */
+ pnpbios_calls_init(pnp_bios_install);
+
+ /* read the node info */
+ ret = pnp_bios_dev_node_info(&node_info);
+ if (ret) {
+ printk(KERN_ERR
+ "PnPBIOS: Unable to get node info. Aborting.\n");
+ return ret;
+ }
+
+ /* register with the pnp layer */
+ ret = pnp_register_protocol(&pnpbios_protocol);
+ if (ret) {
+ printk(KERN_ERR
+ "PnPBIOS: Unable to register driver. Aborting.\n");
+ return ret;
+ }
+
+ /* start the proc interface */
+ ret = pnpbios_proc_init();
+ if (ret)
+ printk(KERN_ERR "PnPBIOS: Failed to create proc interface.\n");
+
+ /* scan for pnpbios devices */
+ build_devlist();
+
+ pnp_platform_devices = 1;
+ return 0;
+}
+
+fs_initcall(pnpbios_init);
+
+static int __init pnpbios_thread_init(void)
+{
+ struct task_struct *task;
+
+ if (pnpbios_disabled)
+ return 0;
+
+ init_completion(&unload_sem);
+ task = kthread_run(pnp_dock_thread, NULL, "kpnpbiosd");
+ return PTR_ERR_OR_ZERO(task);
+}
+
+/* Start the kernel thread later: */
+device_initcall(pnpbios_thread_init);
+
+EXPORT_SYMBOL(pnpbios_protocol);
diff --git a/drivers/pnp/pnpbios/pnpbios.h b/drivers/pnp/pnpbios/pnpbios.h
new file mode 100644
index 0000000..b09cf6d
--- /dev/null
+++ b/drivers/pnp/pnpbios/pnpbios.h
@@ -0,0 +1,182 @@
+/*
+ * pnpbios.h - contains local definitions
+ */
+
+/*
+ * Include file for the interface to a PnP BIOS
+ *
+ * Original BIOS code (C) 1998 Christian Schmidt (chr.schmidt@tu-bs.de)
+ * PnP handler parts (c) 1998 Tom Lees <tom@lpsg.demon.co.uk>
+ * Minor reorganizations by David Hinds <dahinds@users.sourceforge.net>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License as published by the
+ * Free Software Foundation; either version 2, or (at your option) any
+ * later version.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+/*
+ * Return codes
+ */
+#define PNP_SUCCESS 0x00
+#define PNP_NOT_SET_STATICALLY 0x7f
+#define PNP_UNKNOWN_FUNCTION 0x81
+#define PNP_FUNCTION_NOT_SUPPORTED 0x82
+#define PNP_INVALID_HANDLE 0x83
+#define PNP_BAD_PARAMETER 0x84
+#define PNP_SET_FAILED 0x85
+#define PNP_EVENTS_NOT_PENDING 0x86
+#define PNP_SYSTEM_NOT_DOCKED 0x87
+#define PNP_NO_ISA_PNP_CARDS 0x88
+#define PNP_UNABLE_TO_DETERMINE_DOCK_CAPABILITIES 0x89
+#define PNP_CONFIG_CHANGE_FAILED_NO_BATTERY 0x8a
+#define PNP_CONFIG_CHANGE_FAILED_RESOURCE_CONFLICT 0x8b
+#define PNP_BUFFER_TOO_SMALL 0x8c
+#define PNP_USE_ESCD_SUPPORT 0x8d
+#define PNP_MESSAGE_NOT_SUPPORTED 0x8e
+#define PNP_HARDWARE_ERROR 0x8f
+
+#define ESCD_SUCCESS 0x00
+#define ESCD_IO_ERROR_READING 0x55
+#define ESCD_INVALID 0x56
+#define ESCD_BUFFER_TOO_SMALL 0x59
+#define ESCD_NVRAM_TOO_SMALL 0x5a
+#define ESCD_FUNCTION_NOT_SUPPORTED 0x81
+
+/*
+ * Events that can be received by "get event"
+ */
+#define PNPEV_ABOUT_TO_CHANGE_CONFIG 0x0001
+#define PNPEV_DOCK_CHANGED 0x0002
+#define PNPEV_SYSTEM_DEVICE_CHANGED 0x0003
+#define PNPEV_CONFIG_CHANGED_FAILED 0x0004
+#define PNPEV_UNKNOWN_SYSTEM_EVENT 0xffff
+/* 0x8000 through 0xfffe are OEM defined */
+
+/*
+ * Messages that should be sent through "send message"
+ */
+#define PNPMSG_OK 0x00
+#define PNPMSG_ABORT 0x01
+#define PNPMSG_UNDOCK_DEFAULT_ACTION 0x40
+#define PNPMSG_POWER_OFF 0x41
+#define PNPMSG_PNP_OS_ACTIVE 0x42
+#define PNPMSG_PNP_OS_INACTIVE 0x43
+
+/*
+ * Plug and Play BIOS flags
+ */
+#define PNPBIOS_NO_DISABLE 0x0001
+#define PNPBIOS_NO_CONFIG 0x0002
+#define PNPBIOS_OUTPUT 0x0004
+#define PNPBIOS_INPUT 0x0008
+#define PNPBIOS_BOOTABLE 0x0010
+#define PNPBIOS_DOCK 0x0020
+#define PNPBIOS_REMOVABLE 0x0040
+#define pnpbios_is_static(x) (((x)->flags & 0x0100) == 0x0000)
+#define pnpbios_is_dynamic(x) ((x)->flags & 0x0080)
+
+/*
+ * Function Parameters
+ */
+#define PNPMODE_STATIC 1
+#define PNPMODE_DYNAMIC 0
+
+/* 0x8000 through 0xffff are OEM defined */
+
+#pragma pack(1)
+struct pnp_dev_node_info {
+ __u16 no_nodes;
+ __u16 max_node_size;
+};
+struct pnp_docking_station_info {
+ __u32 location_id;
+ __u32 serial;
+ __u16 capabilities;
+};
+struct pnp_isa_config_struc {
+ __u8 revision;
+ __u8 no_csns;
+ __u16 isa_rd_data_port;
+ __u16 reserved;
+};
+struct escd_info_struc {
+ __u16 min_escd_write_size;
+ __u16 escd_size;
+ __u32 nv_storage_base;
+};
+struct pnp_bios_node {
+ __u16 size;
+ __u8 handle;
+ __u32 eisa_id;
+ __u8 type_code[3];
+ __u16 flags;
+ __u8 data[0];
+};
+#pragma pack()
+
+/* non-exported */
+extern struct pnp_dev_node_info node_info;
+
+extern int pnp_bios_dev_node_info(struct pnp_dev_node_info *data);
+extern int pnp_bios_get_dev_node(u8 *nodenum, char config,
+ struct pnp_bios_node *data);
+extern int pnp_bios_set_dev_node(u8 nodenum, char config,
+ struct pnp_bios_node *data);
+extern int pnp_bios_get_stat_res(char *info);
+extern int pnp_bios_isapnp_config(struct pnp_isa_config_struc *data);
+extern int pnp_bios_escd_info(struct escd_info_struc *data);
+extern int pnp_bios_read_escd(char *data, u32 nvram_base);
+extern int pnp_bios_dock_station_info(struct pnp_docking_station_info *data);
+
+#pragma pack(1)
+union pnp_bios_install_struct {
+ struct {
+ u32 signature; /* "$PnP" */
+ u8 version; /* in BCD */
+ u8 length; /* length in bytes, currently 21h */
+ u16 control; /* system capabilities */
+ u8 checksum; /* all bytes must add up to 0 */
+
+ u32 eventflag; /* phys. address of the event flag */
+ u16 rmoffset; /* real mode entry point */
+ u16 rmcseg;
+ u16 pm16offset; /* 16 bit protected mode entry */
+ u32 pm16cseg;
+ u32 deviceID; /* EISA encoded system ID or 0 */
+ u16 rmdseg; /* real mode data segment */
+ u32 pm16dseg; /* 16 bit pm data segment base */
+ } fields;
+ char chars[0x21]; /* To calculate the checksum */
+};
+#pragma pack()
+
+extern int pnp_bios_present(void);
+extern int pnpbios_dont_use_current_config;
+
+extern int pnpbios_parse_data_stream(struct pnp_dev *dev, struct pnp_bios_node * node);
+extern int pnpbios_read_resources_from_node(struct pnp_dev *dev, struct pnp_bios_node *node);
+extern int pnpbios_write_resources_to_node(struct pnp_dev *dev, struct pnp_bios_node *node);
+extern void pnpid32_to_pnpid(u32 id, char *str);
+
+extern void pnpbios_print_status(const char * module, u16 status);
+extern void pnpbios_calls_init(union pnp_bios_install_struct * header);
+
+#ifdef CONFIG_PNPBIOS_PROC_FS
+extern int pnpbios_interface_attach_device(struct pnp_bios_node * node);
+extern int pnpbios_proc_init (void);
+extern void pnpbios_proc_exit (void);
+#else
+static inline int pnpbios_interface_attach_device(struct pnp_bios_node * node) { return 0; }
+static inline int pnpbios_proc_init (void) { return 0; }
+static inline void pnpbios_proc_exit (void) { ; }
+#endif /* CONFIG_PNPBIOS_PROC_FS */
diff --git a/drivers/pnp/pnpbios/proc.c b/drivers/pnp/pnpbios/proc.c
new file mode 100644
index 0000000..fe1c8f5
--- /dev/null
+++ b/drivers/pnp/pnpbios/proc.c
@@ -0,0 +1,287 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * /proc/bus/pnp interface for Plug and Play devices
+ *
+ * Written by David Hinds, dahinds@users.sourceforge.net
+ * Modified by Thomas Hood
+ *
+ * The .../devices and .../<node> and .../boot/<node> files are
+ * utilized by the lspnp and setpnp utilities, supplied with the
+ * pcmcia-cs package.
+ * http://pcmcia-cs.sourceforge.net
+ *
+ * The .../escd file is utilized by the lsescd utility written by
+ * Gunther Mayer.
+ *
+ * The .../legacy_device_resources file is not used yet.
+ *
+ * The other files are human-readable.
+ */
+
+#include <linux/module.h>
+#include <linux/kernel.h>
+#include <linux/slab.h>
+#include <linux/types.h>
+#include <linux/proc_fs.h>
+#include <linux/pnp.h>
+#include <linux/seq_file.h>
+#include <linux/init.h>
+
+#include <linux/uaccess.h>
+
+#include "pnpbios.h"
+
+static struct proc_dir_entry *proc_pnp = NULL;
+static struct proc_dir_entry *proc_pnp_boot = NULL;
+
+static int pnpconfig_proc_show(struct seq_file *m, void *v)
+{
+ struct pnp_isa_config_struc pnps;
+
+ if (pnp_bios_isapnp_config(&pnps))
+ return -EIO;
+ seq_printf(m, "structure_revision %d\n"
+ "number_of_CSNs %d\n"
+ "ISA_read_data_port 0x%x\n",
+ pnps.revision, pnps.no_csns, pnps.isa_rd_data_port);
+ return 0;
+}
+
+static int escd_info_proc_show(struct seq_file *m, void *v)
+{
+ struct escd_info_struc escd;
+
+ if (pnp_bios_escd_info(&escd))
+ return -EIO;
+ seq_printf(m, "min_ESCD_write_size %d\n"
+ "ESCD_size %d\n"
+ "NVRAM_base 0x%x\n",
+ escd.min_escd_write_size,
+ escd.escd_size, escd.nv_storage_base);
+ return 0;
+}
+
+#define MAX_SANE_ESCD_SIZE (32*1024)
+static int escd_proc_show(struct seq_file *m, void *v)
+{
+ struct escd_info_struc escd;
+ char *tmpbuf;
+ int escd_size;
+
+ if (pnp_bios_escd_info(&escd))
+ return -EIO;
+
+ /* sanity check */
+ if (escd.escd_size > MAX_SANE_ESCD_SIZE) {
+ printk(KERN_ERR
+ "PnPBIOS: %s: ESCD size reported by BIOS escd_info call is too great\n", __func__);
+ return -EFBIG;
+ }
+
+ tmpbuf = kzalloc(escd.escd_size, GFP_KERNEL);
+ if (!tmpbuf)
+ return -ENOMEM;
+
+ if (pnp_bios_read_escd(tmpbuf, escd.nv_storage_base)) {
+ kfree(tmpbuf);
+ return -EIO;
+ }
+
+ escd_size =
+ (unsigned char)(tmpbuf[0]) + (unsigned char)(tmpbuf[1]) * 256;
+
+ /* sanity check */
+ if (escd_size > MAX_SANE_ESCD_SIZE) {
+ printk(KERN_ERR "PnPBIOS: %s: ESCD size reported by"
+ " BIOS read_escd call is too great\n", __func__);
+ kfree(tmpbuf);
+ return -EFBIG;
+ }
+
+ seq_write(m, tmpbuf, escd_size);
+ kfree(tmpbuf);
+ return 0;
+}
+
+static int pnp_legacyres_proc_show(struct seq_file *m, void *v)
+{
+ void *buf;
+
+ buf = kmalloc(65536, GFP_KERNEL);
+ if (!buf)
+ return -ENOMEM;
+ if (pnp_bios_get_stat_res(buf)) {
+ kfree(buf);
+ return -EIO;
+ }
+
+ seq_write(m, buf, 65536);
+ kfree(buf);
+ return 0;
+}
+
+static int pnp_devices_proc_show(struct seq_file *m, void *v)
+{
+ struct pnp_bios_node *node;
+ u8 nodenum;
+
+ node = kzalloc(node_info.max_node_size, GFP_KERNEL);
+ if (!node)
+ return -ENOMEM;
+
+ for (nodenum = 0; nodenum < 0xff;) {
+ u8 thisnodenum = nodenum;
+
+ if (pnp_bios_get_dev_node(&nodenum, PNPMODE_DYNAMIC, node))
+ break;
+ seq_printf(m, "%02x\t%08x\t%3phC\t%04x\n",
+ node->handle, node->eisa_id,
+ node->type_code, node->flags);
+ if (nodenum <= thisnodenum) {
+ printk(KERN_ERR
+ "%s Node number 0x%x is out of sequence following node 0x%x. Aborting.\n",
+ "PnPBIOS: proc_read_devices:",
+ (unsigned int)nodenum,
+ (unsigned int)thisnodenum);
+ break;
+ }
+ }
+ kfree(node);
+ return 0;
+}
+
+static int pnpbios_proc_show(struct seq_file *m, void *v)
+{
+ void *data = m->private;
+ struct pnp_bios_node *node;
+ int boot = (long)data >> 8;
+ u8 nodenum = (long)data;
+ int len;
+
+ node = kzalloc(node_info.max_node_size, GFP_KERNEL);
+ if (!node)
+ return -ENOMEM;
+ if (pnp_bios_get_dev_node(&nodenum, boot, node)) {
+ kfree(node);
+ return -EIO;
+ }
+ len = node->size - sizeof(struct pnp_bios_node);
+ seq_write(m, node->data, len);
+ kfree(node);
+ return 0;
+}
+
+static int pnpbios_proc_open(struct inode *inode, struct file *file)
+{
+ return single_open(file, pnpbios_proc_show, PDE_DATA(inode));
+}
+
+static ssize_t pnpbios_proc_write(struct file *file, const char __user *buf,
+ size_t count, loff_t *pos)
+{
+ void *data = PDE_DATA(file_inode(file));
+ struct pnp_bios_node *node;
+ int boot = (long)data >> 8;
+ u8 nodenum = (long)data;
+ int ret = count;
+
+ node = kzalloc(node_info.max_node_size, GFP_KERNEL);
+ if (!node)
+ return -ENOMEM;
+ if (pnp_bios_get_dev_node(&nodenum, boot, node)) {
+ ret = -EIO;
+ goto out;
+ }
+ if (count != node->size - sizeof(struct pnp_bios_node)) {
+ ret = -EINVAL;
+ goto out;
+ }
+ if (copy_from_user(node->data, buf, count)) {
+ ret = -EFAULT;
+ goto out;
+ }
+ if (pnp_bios_set_dev_node(node->handle, boot, node) != 0) {
+ ret = -EINVAL;
+ goto out;
+ }
+ ret = count;
+out:
+ kfree(node);
+ return ret;
+}
+
+static const struct file_operations pnpbios_proc_fops = {
+ .owner = THIS_MODULE,
+ .open = pnpbios_proc_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+ .write = pnpbios_proc_write,
+};
+
+int pnpbios_interface_attach_device(struct pnp_bios_node *node)
+{
+ char name[3];
+
+ sprintf(name, "%02x", node->handle);
+
+ if (!proc_pnp)
+ return -EIO;
+ if (!pnpbios_dont_use_current_config) {
+ proc_create_data(name, 0644, proc_pnp, &pnpbios_proc_fops,
+ (void *)(long)(node->handle));
+ }
+
+ if (!proc_pnp_boot)
+ return -EIO;
+ if (proc_create_data(name, 0644, proc_pnp_boot, &pnpbios_proc_fops,
+ (void *)(long)(node->handle + 0x100)))
+ return 0;
+ return -EIO;
+}
+
+/*
+ * When this is called, pnpbios functions are assumed to
+ * work and the pnpbios_dont_use_current_config flag
+ * should already have been set to the appropriate value
+ */
+int __init pnpbios_proc_init(void)
+{
+ proc_pnp = proc_mkdir("bus/pnp", NULL);
+ if (!proc_pnp)
+ return -EIO;
+ proc_pnp_boot = proc_mkdir("boot", proc_pnp);
+ if (!proc_pnp_boot)
+ return -EIO;
+ proc_create_single("devices", 0, proc_pnp, pnp_devices_proc_show);
+ proc_create_single("configuration_info", 0, proc_pnp,
+ pnpconfig_proc_show);
+ proc_create_single("escd_info", 0, proc_pnp, escd_info_proc_show);
+ proc_create_single("escd", S_IRUSR, proc_pnp, escd_proc_show);
+ proc_create_single("legacy_device_resources", 0, proc_pnp,
+ pnp_legacyres_proc_show);
+ return 0;
+}
+
+void __exit pnpbios_proc_exit(void)
+{
+ int i;
+ char name[3];
+
+ if (!proc_pnp)
+ return;
+
+ for (i = 0; i < 0xff; i++) {
+ sprintf(name, "%02x", i);
+ if (!pnpbios_dont_use_current_config)
+ remove_proc_entry(name, proc_pnp);
+ remove_proc_entry(name, proc_pnp_boot);
+ }
+ remove_proc_entry("legacy_device_resources", proc_pnp);
+ remove_proc_entry("escd", proc_pnp);
+ remove_proc_entry("escd_info", proc_pnp);
+ remove_proc_entry("configuration_info", proc_pnp);
+ remove_proc_entry("devices", proc_pnp);
+ remove_proc_entry("boot", proc_pnp);
+ remove_proc_entry("bus/pnp", NULL);
+}
diff --git a/drivers/pnp/pnpbios/rsparser.c b/drivers/pnp/pnpbios/rsparser.c
new file mode 100644
index 0000000..2f31b21
--- /dev/null
+++ b/drivers/pnp/pnpbios/rsparser.c
@@ -0,0 +1,810 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * rsparser.c - parses and encodes pnpbios resource data streams
+ */
+
+#include <linux/ctype.h>
+#include <linux/pnp.h>
+#include <linux/string.h>
+
+#ifdef CONFIG_PCI
+#include <linux/pci.h>
+#else
+inline void pcibios_penalize_isa_irq(int irq, int active)
+{
+}
+#endif /* CONFIG_PCI */
+
+#include "../base.h"
+#include "pnpbios.h"
+
+/* standard resource tags */
+#define SMALL_TAG_PNPVERNO 0x01
+#define SMALL_TAG_LOGDEVID 0x02
+#define SMALL_TAG_COMPATDEVID 0x03
+#define SMALL_TAG_IRQ 0x04
+#define SMALL_TAG_DMA 0x05
+#define SMALL_TAG_STARTDEP 0x06
+#define SMALL_TAG_ENDDEP 0x07
+#define SMALL_TAG_PORT 0x08
+#define SMALL_TAG_FIXEDPORT 0x09
+#define SMALL_TAG_VENDOR 0x0e
+#define SMALL_TAG_END 0x0f
+#define LARGE_TAG 0x80
+#define LARGE_TAG_MEM 0x81
+#define LARGE_TAG_ANSISTR 0x82
+#define LARGE_TAG_UNICODESTR 0x83
+#define LARGE_TAG_VENDOR 0x84
+#define LARGE_TAG_MEM32 0x85
+#define LARGE_TAG_FIXEDMEM32 0x86
+
+/*
+ * Resource Data Stream Format:
+ *
+ * Allocated Resources (required)
+ * end tag ->
+ * Resource Configuration Options (optional)
+ * end tag ->
+ * Compitable Device IDs (optional)
+ * final end tag ->
+ */
+
+/*
+ * Allocated Resources
+ */
+
+static void pnpbios_parse_allocated_ioresource(struct pnp_dev *dev,
+ int start, int len)
+{
+ int flags = 0;
+ int end = start + len - 1;
+
+ if (len <= 0 || end >= 0x10003)
+ flags |= IORESOURCE_DISABLED;
+
+ pnp_add_io_resource(dev, start, end, flags);
+}
+
+static void pnpbios_parse_allocated_memresource(struct pnp_dev *dev,
+ int start, int len)
+{
+ int flags = 0;
+ int end = start + len - 1;
+
+ if (len <= 0)
+ flags |= IORESOURCE_DISABLED;
+
+ pnp_add_mem_resource(dev, start, end, flags);
+}
+
+static unsigned char *pnpbios_parse_allocated_resource_data(struct pnp_dev *dev,
+ unsigned char *p,
+ unsigned char *end)
+{
+ unsigned int len, tag;
+ int io, size, mask, i, flags;
+
+ if (!p)
+ return NULL;
+
+ pnp_dbg(&dev->dev, "parse allocated resources\n");
+
+ pnp_init_resources(dev);
+
+ while ((char *)p < (char *)end) {
+
+ /* determine the type of tag */
+ if (p[0] & LARGE_TAG) { /* large tag */
+ len = (p[2] << 8) | p[1];
+ tag = p[0];
+ } else { /* small tag */
+ len = p[0] & 0x07;
+ tag = ((p[0] >> 3) & 0x0f);
+ }
+
+ switch (tag) {
+
+ case LARGE_TAG_MEM:
+ if (len != 9)
+ goto len_err;
+ io = *(short *)&p[4];
+ size = *(short *)&p[10];
+ pnpbios_parse_allocated_memresource(dev, io, size);
+ break;
+
+ case LARGE_TAG_ANSISTR:
+ /* ignore this for now */
+ break;
+
+ case LARGE_TAG_VENDOR:
+ /* do nothing */
+ break;
+
+ case LARGE_TAG_MEM32:
+ if (len != 17)
+ goto len_err;
+ io = *(int *)&p[4];
+ size = *(int *)&p[16];
+ pnpbios_parse_allocated_memresource(dev, io, size);
+ break;
+
+ case LARGE_TAG_FIXEDMEM32:
+ if (len != 9)
+ goto len_err;
+ io = *(int *)&p[4];
+ size = *(int *)&p[8];
+ pnpbios_parse_allocated_memresource(dev, io, size);
+ break;
+
+ case SMALL_TAG_IRQ:
+ if (len < 2 || len > 3)
+ goto len_err;
+ flags = 0;
+ io = -1;
+ mask = p[1] + p[2] * 256;
+ for (i = 0; i < 16; i++, mask = mask >> 1)
+ if (mask & 0x01)
+ io = i;
+ if (io != -1)
+ pcibios_penalize_isa_irq(io, 1);
+ else
+ flags = IORESOURCE_DISABLED;
+ pnp_add_irq_resource(dev, io, flags);
+ break;
+
+ case SMALL_TAG_DMA:
+ if (len != 2)
+ goto len_err;
+ flags = 0;
+ io = -1;
+ mask = p[1];
+ for (i = 0; i < 8; i++, mask = mask >> 1)
+ if (mask & 0x01)
+ io = i;
+ if (io == -1)
+ flags = IORESOURCE_DISABLED;
+ pnp_add_dma_resource(dev, io, flags);
+ break;
+
+ case SMALL_TAG_PORT:
+ if (len != 7)
+ goto len_err;
+ io = p[2] + p[3] * 256;
+ size = p[7];
+ pnpbios_parse_allocated_ioresource(dev, io, size);
+ break;
+
+ case SMALL_TAG_VENDOR:
+ /* do nothing */
+ break;
+
+ case SMALL_TAG_FIXEDPORT:
+ if (len != 3)
+ goto len_err;
+ io = p[1] + p[2] * 256;
+ size = p[3];
+ pnpbios_parse_allocated_ioresource(dev, io, size);
+ break;
+
+ case SMALL_TAG_END:
+ p = p + 2;
+ return (unsigned char *)p;
+ break;
+
+ default: /* an unknown tag */
+len_err:
+ dev_err(&dev->dev, "unknown tag %#x length %d\n",
+ tag, len);
+ break;
+ }
+
+ /* continue to the next tag */
+ if (p[0] & LARGE_TAG)
+ p += len + 3;
+ else
+ p += len + 1;
+ }
+
+ dev_err(&dev->dev, "no end tag in resource structure\n");
+
+ return NULL;
+}
+
+/*
+ * Resource Configuration Options
+ */
+
+static __init void pnpbios_parse_mem_option(struct pnp_dev *dev,
+ unsigned char *p, int size,
+ unsigned int option_flags)
+{
+ resource_size_t min, max, align, len;
+ unsigned char flags;
+
+ min = ((p[5] << 8) | p[4]) << 8;
+ max = ((p[7] << 8) | p[6]) << 8;
+ align = (p[9] << 8) | p[8];
+ len = ((p[11] << 8) | p[10]) << 8;
+ flags = p[3];
+ pnp_register_mem_resource(dev, option_flags, min, max, align, len,
+ flags);
+}
+
+static __init void pnpbios_parse_mem32_option(struct pnp_dev *dev,
+ unsigned char *p, int size,
+ unsigned int option_flags)
+{
+ resource_size_t min, max, align, len;
+ unsigned char flags;
+
+ min = (p[7] << 24) | (p[6] << 16) | (p[5] << 8) | p[4];
+ max = (p[11] << 24) | (p[10] << 16) | (p[9] << 8) | p[8];
+ align = (p[15] << 24) | (p[14] << 16) | (p[13] << 8) | p[12];
+ len = (p[19] << 24) | (p[18] << 16) | (p[17] << 8) | p[16];
+ flags = p[3];
+ pnp_register_mem_resource(dev, option_flags, min, max, align, len,
+ flags);
+}
+
+static __init void pnpbios_parse_fixed_mem32_option(struct pnp_dev *dev,
+ unsigned char *p, int size,
+ unsigned int option_flags)
+{
+ resource_size_t base, len;
+ unsigned char flags;
+
+ base = (p[7] << 24) | (p[6] << 16) | (p[5] << 8) | p[4];
+ len = (p[11] << 24) | (p[10] << 16) | (p[9] << 8) | p[8];
+ flags = p[3];
+ pnp_register_mem_resource(dev, option_flags, base, base, 0, len, flags);
+}
+
+static __init void pnpbios_parse_irq_option(struct pnp_dev *dev,
+ unsigned char *p, int size,
+ unsigned int option_flags)
+{
+ unsigned long bits;
+ pnp_irq_mask_t map;
+ unsigned char flags = IORESOURCE_IRQ_HIGHEDGE;
+
+ bits = (p[2] << 8) | p[1];
+
+ bitmap_zero(map.bits, PNP_IRQ_NR);
+ bitmap_copy(map.bits, &bits, 16);
+
+ if (size > 2)
+ flags = p[3];
+
+ pnp_register_irq_resource(dev, option_flags, &map, flags);
+}
+
+static __init void pnpbios_parse_dma_option(struct pnp_dev *dev,
+ unsigned char *p, int size,
+ unsigned int option_flags)
+{
+ pnp_register_dma_resource(dev, option_flags, p[1], p[2]);
+}
+
+static __init void pnpbios_parse_port_option(struct pnp_dev *dev,
+ unsigned char *p, int size,
+ unsigned int option_flags)
+{
+ resource_size_t min, max, align, len;
+ unsigned char flags;
+
+ min = (p[3] << 8) | p[2];
+ max = (p[5] << 8) | p[4];
+ align = p[6];
+ len = p[7];
+ flags = p[1] ? IORESOURCE_IO_16BIT_ADDR : 0;
+ pnp_register_port_resource(dev, option_flags, min, max, align, len,
+ flags);
+}
+
+static __init void pnpbios_parse_fixed_port_option(struct pnp_dev *dev,
+ unsigned char *p, int size,
+ unsigned int option_flags)
+{
+ resource_size_t base, len;
+
+ base = (p[2] << 8) | p[1];
+ len = p[3];
+ pnp_register_port_resource(dev, option_flags, base, base, 0, len,
+ IORESOURCE_IO_FIXED);
+}
+
+static __init unsigned char *
+pnpbios_parse_resource_option_data(unsigned char *p, unsigned char *end,
+ struct pnp_dev *dev)
+{
+ unsigned int len, tag;
+ int priority;
+ unsigned int option_flags;
+
+ if (!p)
+ return NULL;
+
+ pnp_dbg(&dev->dev, "parse resource options\n");
+ option_flags = 0;
+ while ((char *)p < (char *)end) {
+
+ /* determine the type of tag */
+ if (p[0] & LARGE_TAG) { /* large tag */
+ len = (p[2] << 8) | p[1];
+ tag = p[0];
+ } else { /* small tag */
+ len = p[0] & 0x07;
+ tag = ((p[0] >> 3) & 0x0f);
+ }
+
+ switch (tag) {
+
+ case LARGE_TAG_MEM:
+ if (len != 9)
+ goto len_err;
+ pnpbios_parse_mem_option(dev, p, len, option_flags);
+ break;
+
+ case LARGE_TAG_MEM32:
+ if (len != 17)
+ goto len_err;
+ pnpbios_parse_mem32_option(dev, p, len, option_flags);
+ break;
+
+ case LARGE_TAG_FIXEDMEM32:
+ if (len != 9)
+ goto len_err;
+ pnpbios_parse_fixed_mem32_option(dev, p, len,
+ option_flags);
+ break;
+
+ case SMALL_TAG_IRQ:
+ if (len < 2 || len > 3)
+ goto len_err;
+ pnpbios_parse_irq_option(dev, p, len, option_flags);
+ break;
+
+ case SMALL_TAG_DMA:
+ if (len != 2)
+ goto len_err;
+ pnpbios_parse_dma_option(dev, p, len, option_flags);
+ break;
+
+ case SMALL_TAG_PORT:
+ if (len != 7)
+ goto len_err;
+ pnpbios_parse_port_option(dev, p, len, option_flags);
+ break;
+
+ case SMALL_TAG_VENDOR:
+ /* do nothing */
+ break;
+
+ case SMALL_TAG_FIXEDPORT:
+ if (len != 3)
+ goto len_err;
+ pnpbios_parse_fixed_port_option(dev, p, len,
+ option_flags);
+ break;
+
+ case SMALL_TAG_STARTDEP:
+ if (len > 1)
+ goto len_err;
+ priority = PNP_RES_PRIORITY_ACCEPTABLE;
+ if (len > 0)
+ priority = p[1];
+ option_flags = pnp_new_dependent_set(dev, priority);
+ break;
+
+ case SMALL_TAG_ENDDEP:
+ if (len != 0)
+ goto len_err;
+ option_flags = 0;
+ break;
+
+ case SMALL_TAG_END:
+ return p + 2;
+
+ default: /* an unknown tag */
+len_err:
+ dev_err(&dev->dev, "unknown tag %#x length %d\n",
+ tag, len);
+ break;
+ }
+
+ /* continue to the next tag */
+ if (p[0] & LARGE_TAG)
+ p += len + 3;
+ else
+ p += len + 1;
+ }
+
+ dev_err(&dev->dev, "no end tag in resource structure\n");
+
+ return NULL;
+}
+
+/*
+ * Compatible Device IDs
+ */
+
+static unsigned char *pnpbios_parse_compatible_ids(unsigned char *p,
+ unsigned char *end,
+ struct pnp_dev *dev)
+{
+ int len, tag;
+ u32 eisa_id;
+ char id[8];
+ struct pnp_id *dev_id;
+
+ if (!p)
+ return NULL;
+
+ while ((char *)p < (char *)end) {
+
+ /* determine the type of tag */
+ if (p[0] & LARGE_TAG) { /* large tag */
+ len = (p[2] << 8) | p[1];
+ tag = p[0];
+ } else { /* small tag */
+ len = p[0] & 0x07;
+ tag = ((p[0] >> 3) & 0x0f);
+ }
+
+ switch (tag) {
+
+ case LARGE_TAG_ANSISTR:
+ strncpy(dev->name, p + 3,
+ len >= PNP_NAME_LEN ? PNP_NAME_LEN - 2 : len);
+ dev->name[len >=
+ PNP_NAME_LEN ? PNP_NAME_LEN - 1 : len] = '\0';
+ break;
+
+ case SMALL_TAG_COMPATDEVID: /* compatible ID */
+ if (len != 4)
+ goto len_err;
+ eisa_id = p[1] | p[2] << 8 | p[3] << 16 | p[4] << 24;
+ pnp_eisa_id_to_string(eisa_id & PNP_EISA_ID_MASK, id);
+ dev_id = pnp_add_id(dev, id);
+ if (!dev_id)
+ return NULL;
+ break;
+
+ case SMALL_TAG_END:
+ p = p + 2;
+ return (unsigned char *)p;
+ break;
+
+ default: /* an unknown tag */
+len_err:
+ dev_err(&dev->dev, "unknown tag %#x length %d\n",
+ tag, len);
+ break;
+ }
+
+ /* continue to the next tag */
+ if (p[0] & LARGE_TAG)
+ p += len + 3;
+ else
+ p += len + 1;
+ }
+
+ dev_err(&dev->dev, "no end tag in resource structure\n");
+
+ return NULL;
+}
+
+/*
+ * Allocated Resource Encoding
+ */
+
+static void pnpbios_encode_mem(struct pnp_dev *dev, unsigned char *p,
+ struct resource *res)
+{
+ unsigned long base;
+ unsigned long len;
+
+ if (pnp_resource_enabled(res)) {
+ base = res->start;
+ len = resource_size(res);
+ } else {
+ base = 0;
+ len = 0;
+ }
+
+ p[4] = (base >> 8) & 0xff;
+ p[5] = ((base >> 8) >> 8) & 0xff;
+ p[6] = (base >> 8) & 0xff;
+ p[7] = ((base >> 8) >> 8) & 0xff;
+ p[10] = (len >> 8) & 0xff;
+ p[11] = ((len >> 8) >> 8) & 0xff;
+
+ pnp_dbg(&dev->dev, " encode mem %#lx-%#lx\n", base, base + len - 1);
+}
+
+static void pnpbios_encode_mem32(struct pnp_dev *dev, unsigned char *p,
+ struct resource *res)
+{
+ unsigned long base;
+ unsigned long len;
+
+ if (pnp_resource_enabled(res)) {
+ base = res->start;
+ len = resource_size(res);
+ } else {
+ base = 0;
+ len = 0;
+ }
+
+ p[4] = base & 0xff;
+ p[5] = (base >> 8) & 0xff;
+ p[6] = (base >> 16) & 0xff;
+ p[7] = (base >> 24) & 0xff;
+ p[8] = base & 0xff;
+ p[9] = (base >> 8) & 0xff;
+ p[10] = (base >> 16) & 0xff;
+ p[11] = (base >> 24) & 0xff;
+ p[16] = len & 0xff;
+ p[17] = (len >> 8) & 0xff;
+ p[18] = (len >> 16) & 0xff;
+ p[19] = (len >> 24) & 0xff;
+
+ pnp_dbg(&dev->dev, " encode mem32 %#lx-%#lx\n", base, base + len - 1);
+}
+
+static void pnpbios_encode_fixed_mem32(struct pnp_dev *dev, unsigned char *p,
+ struct resource *res)
+{
+ unsigned long base;
+ unsigned long len;
+
+ if (pnp_resource_enabled(res)) {
+ base = res->start;
+ len = resource_size(res);
+ } else {
+ base = 0;
+ len = 0;
+ }
+
+ p[4] = base & 0xff;
+ p[5] = (base >> 8) & 0xff;
+ p[6] = (base >> 16) & 0xff;
+ p[7] = (base >> 24) & 0xff;
+ p[8] = len & 0xff;
+ p[9] = (len >> 8) & 0xff;
+ p[10] = (len >> 16) & 0xff;
+ p[11] = (len >> 24) & 0xff;
+
+ pnp_dbg(&dev->dev, " encode fixed_mem32 %#lx-%#lx\n", base,
+ base + len - 1);
+}
+
+static void pnpbios_encode_irq(struct pnp_dev *dev, unsigned char *p,
+ struct resource *res)
+{
+ unsigned long map;
+
+ if (pnp_resource_enabled(res))
+ map = 1 << res->start;
+ else
+ map = 0;
+
+ p[1] = map & 0xff;
+ p[2] = (map >> 8) & 0xff;
+
+ pnp_dbg(&dev->dev, " encode irq mask %#lx\n", map);
+}
+
+static void pnpbios_encode_dma(struct pnp_dev *dev, unsigned char *p,
+ struct resource *res)
+{
+ unsigned long map;
+
+ if (pnp_resource_enabled(res))
+ map = 1 << res->start;
+ else
+ map = 0;
+
+ p[1] = map & 0xff;
+
+ pnp_dbg(&dev->dev, " encode dma mask %#lx\n", map);
+}
+
+static void pnpbios_encode_port(struct pnp_dev *dev, unsigned char *p,
+ struct resource *res)
+{
+ unsigned long base;
+ unsigned long len;
+
+ if (pnp_resource_enabled(res)) {
+ base = res->start;
+ len = resource_size(res);
+ } else {
+ base = 0;
+ len = 0;
+ }
+
+ p[2] = base & 0xff;
+ p[3] = (base >> 8) & 0xff;
+ p[4] = base & 0xff;
+ p[5] = (base >> 8) & 0xff;
+ p[7] = len & 0xff;
+
+ pnp_dbg(&dev->dev, " encode io %#lx-%#lx\n", base, base + len - 1);
+}
+
+static void pnpbios_encode_fixed_port(struct pnp_dev *dev, unsigned char *p,
+ struct resource *res)
+{
+ unsigned long base = res->start;
+ unsigned long len = resource_size(res);
+
+ if (pnp_resource_enabled(res)) {
+ base = res->start;
+ len = resource_size(res);
+ } else {
+ base = 0;
+ len = 0;
+ }
+
+ p[1] = base & 0xff;
+ p[2] = (base >> 8) & 0xff;
+ p[3] = len & 0xff;
+
+ pnp_dbg(&dev->dev, " encode fixed_io %#lx-%#lx\n", base,
+ base + len - 1);
+}
+
+static unsigned char *pnpbios_encode_allocated_resource_data(struct pnp_dev
+ *dev,
+ unsigned char *p,
+ unsigned char *end)
+{
+ unsigned int len, tag;
+ int port = 0, irq = 0, dma = 0, mem = 0;
+
+ if (!p)
+ return NULL;
+
+ while ((char *)p < (char *)end) {
+
+ /* determine the type of tag */
+ if (p[0] & LARGE_TAG) { /* large tag */
+ len = (p[2] << 8) | p[1];
+ tag = p[0];
+ } else { /* small tag */
+ len = p[0] & 0x07;
+ tag = ((p[0] >> 3) & 0x0f);
+ }
+
+ switch (tag) {
+
+ case LARGE_TAG_MEM:
+ if (len != 9)
+ goto len_err;
+ pnpbios_encode_mem(dev, p,
+ pnp_get_resource(dev, IORESOURCE_MEM, mem));
+ mem++;
+ break;
+
+ case LARGE_TAG_MEM32:
+ if (len != 17)
+ goto len_err;
+ pnpbios_encode_mem32(dev, p,
+ pnp_get_resource(dev, IORESOURCE_MEM, mem));
+ mem++;
+ break;
+
+ case LARGE_TAG_FIXEDMEM32:
+ if (len != 9)
+ goto len_err;
+ pnpbios_encode_fixed_mem32(dev, p,
+ pnp_get_resource(dev, IORESOURCE_MEM, mem));
+ mem++;
+ break;
+
+ case SMALL_TAG_IRQ:
+ if (len < 2 || len > 3)
+ goto len_err;
+ pnpbios_encode_irq(dev, p,
+ pnp_get_resource(dev, IORESOURCE_IRQ, irq));
+ irq++;
+ break;
+
+ case SMALL_TAG_DMA:
+ if (len != 2)
+ goto len_err;
+ pnpbios_encode_dma(dev, p,
+ pnp_get_resource(dev, IORESOURCE_DMA, dma));
+ dma++;
+ break;
+
+ case SMALL_TAG_PORT:
+ if (len != 7)
+ goto len_err;
+ pnpbios_encode_port(dev, p,
+ pnp_get_resource(dev, IORESOURCE_IO, port));
+ port++;
+ break;
+
+ case SMALL_TAG_VENDOR:
+ /* do nothing */
+ break;
+
+ case SMALL_TAG_FIXEDPORT:
+ if (len != 3)
+ goto len_err;
+ pnpbios_encode_fixed_port(dev, p,
+ pnp_get_resource(dev, IORESOURCE_IO, port));
+ port++;
+ break;
+
+ case SMALL_TAG_END:
+ p = p + 2;
+ return (unsigned char *)p;
+ break;
+
+ default: /* an unknown tag */
+len_err:
+ dev_err(&dev->dev, "unknown tag %#x length %d\n",
+ tag, len);
+ break;
+ }
+
+ /* continue to the next tag */
+ if (p[0] & LARGE_TAG)
+ p += len + 3;
+ else
+ p += len + 1;
+ }
+
+ dev_err(&dev->dev, "no end tag in resource structure\n");
+
+ return NULL;
+}
+
+/*
+ * Core Parsing Functions
+ */
+
+int __init pnpbios_parse_data_stream(struct pnp_dev *dev,
+ struct pnp_bios_node *node)
+{
+ unsigned char *p = (char *)node->data;
+ unsigned char *end = (char *)(node->data + node->size);
+
+ p = pnpbios_parse_allocated_resource_data(dev, p, end);
+ if (!p)
+ return -EIO;
+ p = pnpbios_parse_resource_option_data(p, end, dev);
+ if (!p)
+ return -EIO;
+ p = pnpbios_parse_compatible_ids(p, end, dev);
+ if (!p)
+ return -EIO;
+ return 0;
+}
+
+int pnpbios_read_resources_from_node(struct pnp_dev *dev,
+ struct pnp_bios_node *node)
+{
+ unsigned char *p = (char *)node->data;
+ unsigned char *end = (char *)(node->data + node->size);
+
+ p = pnpbios_parse_allocated_resource_data(dev, p, end);
+ if (!p)
+ return -EIO;
+ return 0;
+}
+
+int pnpbios_write_resources_to_node(struct pnp_dev *dev,
+ struct pnp_bios_node *node)
+{
+ unsigned char *p = (char *)node->data;
+ unsigned char *end = (char *)(node->data + node->size);
+
+ p = pnpbios_encode_allocated_resource_data(dev, p, end);
+ if (!p)
+ return -EIO;
+ return 0;
+}
diff --git a/drivers/pnp/quirks.c b/drivers/pnp/quirks.c
new file mode 100644
index 0000000..803666a
--- /dev/null
+++ b/drivers/pnp/quirks.c
@@ -0,0 +1,465 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * This file contains quirk handling code for PnP devices
+ * Some devices do not report all their resources, and need to have extra
+ * resources added. This is most easily accomplished at initialisation time
+ * when building up the resource structure for the first time.
+ *
+ * Copyright (c) 2000 Peter Denison <peterd@pnd-pc.demon.co.uk>
+ * Copyright (C) 2008 Hewlett-Packard Development Company, L.P.
+ * Bjorn Helgaas <bjorn.helgaas@hp.com>
+ *
+ * Heavily based on PCI quirks handling which is
+ *
+ * Copyright (c) 1999 Martin Mares <mj@ucw.cz>
+ */
+
+#include <linux/types.h>
+#include <linux/kernel.h>
+#include <linux/pci.h>
+#include <linux/string.h>
+#include <linux/slab.h>
+#include <linux/pnp.h>
+#include <linux/io.h>
+#include "base.h"
+
+static void quirk_awe32_add_ports(struct pnp_dev *dev,
+ struct pnp_option *option,
+ unsigned int offset)
+{
+ struct pnp_option *new_option;
+
+ new_option = kmalloc(sizeof(struct pnp_option), GFP_KERNEL);
+ if (!new_option) {
+ dev_err(&dev->dev, "couldn't add ioport region to option set "
+ "%d\n", pnp_option_set(option));
+ return;
+ }
+
+ *new_option = *option;
+ new_option->u.port.min += offset;
+ new_option->u.port.max += offset;
+ list_add(&new_option->list, &option->list);
+
+ dev_info(&dev->dev, "added ioport region %#llx-%#llx to set %d\n",
+ (unsigned long long) new_option->u.port.min,
+ (unsigned long long) new_option->u.port.max,
+ pnp_option_set(option));
+}
+
+static void quirk_awe32_resources(struct pnp_dev *dev)
+{
+ struct pnp_option *option;
+ unsigned int set = ~0;
+
+ /*
+ * Add two extra ioport regions (at offset 0x400 and 0x800 from the
+ * one given) to every dependent option set.
+ */
+ list_for_each_entry(option, &dev->options, list) {
+ if (pnp_option_is_dependent(option) &&
+ pnp_option_set(option) != set) {
+ set = pnp_option_set(option);
+ quirk_awe32_add_ports(dev, option, 0x800);
+ quirk_awe32_add_ports(dev, option, 0x400);
+ }
+ }
+}
+
+static void quirk_cmi8330_resources(struct pnp_dev *dev)
+{
+ struct pnp_option *option;
+ struct pnp_irq *irq;
+ struct pnp_dma *dma;
+
+ list_for_each_entry(option, &dev->options, list) {
+ if (!pnp_option_is_dependent(option))
+ continue;
+
+ if (option->type == IORESOURCE_IRQ) {
+ irq = &option->u.irq;
+ bitmap_zero(irq->map.bits, PNP_IRQ_NR);
+ __set_bit(5, irq->map.bits);
+ __set_bit(7, irq->map.bits);
+ __set_bit(10, irq->map.bits);
+ dev_info(&dev->dev, "set possible IRQs in "
+ "option set %d to 5, 7, 10\n",
+ pnp_option_set(option));
+ } else if (option->type == IORESOURCE_DMA) {
+ dma = &option->u.dma;
+ if ((dma->flags & IORESOURCE_DMA_TYPE_MASK) ==
+ IORESOURCE_DMA_8BIT &&
+ dma->map != 0x0A) {
+ dev_info(&dev->dev, "changing possible "
+ "DMA channel mask in option set %d "
+ "from %#02x to 0x0A (1, 3)\n",
+ pnp_option_set(option), dma->map);
+ dma->map = 0x0A;
+ }
+ }
+ }
+}
+
+static void quirk_sb16audio_resources(struct pnp_dev *dev)
+{
+ struct pnp_option *option;
+ unsigned int prev_option_flags = ~0, n = 0;
+ struct pnp_port *port;
+
+ /*
+ * The default range on the OPL port for these devices is 0x388-0x388.
+ * Here we increase that range so that two such cards can be
+ * auto-configured.
+ */
+ list_for_each_entry(option, &dev->options, list) {
+ if (prev_option_flags != option->flags) {
+ prev_option_flags = option->flags;
+ n = 0;
+ }
+
+ if (pnp_option_is_dependent(option) &&
+ option->type == IORESOURCE_IO) {
+ n++;
+ port = &option->u.port;
+ if (n == 3 && port->min == port->max) {
+ port->max += 0x70;
+ dev_info(&dev->dev, "increased option port "
+ "range from %#llx-%#llx to "
+ "%#llx-%#llx\n",
+ (unsigned long long) port->min,
+ (unsigned long long) port->min,
+ (unsigned long long) port->min,
+ (unsigned long long) port->max);
+ }
+ }
+ }
+}
+
+static struct pnp_option *pnp_clone_dependent_set(struct pnp_dev *dev,
+ unsigned int set)
+{
+ struct pnp_option *tail = NULL, *first_new_option = NULL;
+ struct pnp_option *option, *new_option;
+ unsigned int flags;
+
+ list_for_each_entry(option, &dev->options, list) {
+ if (pnp_option_is_dependent(option))
+ tail = option;
+ }
+ if (!tail) {
+ dev_err(&dev->dev, "no dependent option sets\n");
+ return NULL;
+ }
+
+ flags = pnp_new_dependent_set(dev, PNP_RES_PRIORITY_FUNCTIONAL);
+ list_for_each_entry(option, &dev->options, list) {
+ if (pnp_option_is_dependent(option) &&
+ pnp_option_set(option) == set) {
+ new_option = kmalloc(sizeof(struct pnp_option),
+ GFP_KERNEL);
+ if (!new_option) {
+ dev_err(&dev->dev, "couldn't clone dependent "
+ "set %d\n", set);
+ return NULL;
+ }
+
+ *new_option = *option;
+ new_option->flags = flags;
+ if (!first_new_option)
+ first_new_option = new_option;
+
+ list_add(&new_option->list, &tail->list);
+ tail = new_option;
+ }
+ }
+
+ return first_new_option;
+}
+
+
+static void quirk_add_irq_optional_dependent_sets(struct pnp_dev *dev)
+{
+ struct pnp_option *new_option;
+ unsigned int num_sets, i, set;
+ struct pnp_irq *irq;
+
+ num_sets = dev->num_dependent_sets;
+ for (i = 0; i < num_sets; i++) {
+ new_option = pnp_clone_dependent_set(dev, i);
+ if (!new_option)
+ return;
+
+ set = pnp_option_set(new_option);
+ while (new_option && pnp_option_set(new_option) == set) {
+ if (new_option->type == IORESOURCE_IRQ) {
+ irq = &new_option->u.irq;
+ irq->flags |= IORESOURCE_IRQ_OPTIONAL;
+ }
+ dbg_pnp_show_option(dev, new_option);
+ new_option = list_entry(new_option->list.next,
+ struct pnp_option, list);
+ }
+
+ dev_info(&dev->dev, "added dependent option set %d (same as "
+ "set %d except IRQ optional)\n", set, i);
+ }
+}
+
+static void quirk_ad1815_mpu_resources(struct pnp_dev *dev)
+{
+ struct pnp_option *option;
+ struct pnp_irq *irq = NULL;
+ unsigned int independent_irqs = 0;
+
+ list_for_each_entry(option, &dev->options, list) {
+ if (option->type == IORESOURCE_IRQ &&
+ !pnp_option_is_dependent(option)) {
+ independent_irqs++;
+ irq = &option->u.irq;
+ }
+ }
+
+ if (independent_irqs != 1)
+ return;
+
+ irq->flags |= IORESOURCE_IRQ_OPTIONAL;
+ dev_info(&dev->dev, "made independent IRQ optional\n");
+}
+
+#include <linux/pci.h>
+
+static void quirk_system_pci_resources(struct pnp_dev *dev)
+{
+ struct pci_dev *pdev = NULL;
+ struct resource *res;
+ resource_size_t pnp_start, pnp_end, pci_start, pci_end;
+ int i, j;
+
+ /*
+ * Some BIOSes have PNP motherboard devices with resources that
+ * partially overlap PCI BARs. The PNP system driver claims these
+ * motherboard resources, which prevents the normal PCI driver from
+ * requesting them later.
+ *
+ * This patch disables the PNP resources that conflict with PCI BARs
+ * so they won't be claimed by the PNP system driver.
+ */
+ for_each_pci_dev(pdev) {
+ for (i = 0; i < DEVICE_COUNT_RESOURCE; i++) {
+ unsigned long flags, type;
+
+ flags = pci_resource_flags(pdev, i);
+ type = flags & (IORESOURCE_IO | IORESOURCE_MEM);
+ if (!type || pci_resource_len(pdev, i) == 0)
+ continue;
+
+ if (flags & IORESOURCE_UNSET)
+ continue;
+
+ pci_start = pci_resource_start(pdev, i);
+ pci_end = pci_resource_end(pdev, i);
+ for (j = 0;
+ (res = pnp_get_resource(dev, type, j)); j++) {
+ if (res->start == 0 && res->end == 0)
+ continue;
+
+ pnp_start = res->start;
+ pnp_end = res->end;
+
+ /*
+ * If the PNP region doesn't overlap the PCI
+ * region at all, there's no problem.
+ */
+ if (pnp_end < pci_start || pnp_start > pci_end)
+ continue;
+
+ /*
+ * If the PNP region completely encloses (or is
+ * at least as large as) the PCI region, that's
+ * also OK. For example, this happens when the
+ * PNP device describes a bridge with PCI
+ * behind it.
+ */
+ if (pnp_start <= pci_start &&
+ pnp_end >= pci_end)
+ continue;
+
+ /*
+ * Otherwise, the PNP region overlaps *part* of
+ * the PCI region, and that might prevent a PCI
+ * driver from requesting its resources.
+ */
+ dev_warn(&dev->dev,
+ "disabling %pR because it overlaps "
+ "%s BAR %d %pR\n", res,
+ pci_name(pdev), i, &pdev->resource[i]);
+ res->flags |= IORESOURCE_DISABLED;
+ }
+ }
+ }
+}
+
+#ifdef CONFIG_AMD_NB
+
+#include <asm/amd_nb.h>
+
+static void quirk_amd_mmconfig_area(struct pnp_dev *dev)
+{
+ resource_size_t start, end;
+ struct pnp_resource *pnp_res;
+ struct resource *res;
+ struct resource mmconfig_res, *mmconfig;
+
+ mmconfig = amd_get_mmconfig_range(&mmconfig_res);
+ if (!mmconfig)
+ return;
+
+ list_for_each_entry(pnp_res, &dev->resources, list) {
+ res = &pnp_res->res;
+ if (res->end < mmconfig->start || res->start > mmconfig->end ||
+ (res->start == mmconfig->start && res->end == mmconfig->end))
+ continue;
+
+ dev_info(&dev->dev, FW_BUG
+ "%pR covers only part of AMD MMCONFIG area %pR; adding more reservations\n",
+ res, mmconfig);
+ if (mmconfig->start < res->start) {
+ start = mmconfig->start;
+ end = res->start - 1;
+ pnp_add_mem_resource(dev, start, end, 0);
+ }
+ if (mmconfig->end > res->end) {
+ start = res->end + 1;
+ end = mmconfig->end;
+ pnp_add_mem_resource(dev, start, end, 0);
+ }
+ break;
+ }
+}
+#endif
+
+#ifdef CONFIG_PCI
+/* Device IDs of parts that have 32KB MCH space */
+static const unsigned int mch_quirk_devices[] = {
+ 0x0154, /* Ivy Bridge */
+ 0x0a04, /* Haswell-ULT */
+ 0x0c00, /* Haswell */
+ 0x1604, /* Broadwell */
+};
+
+static struct pci_dev *get_intel_host(void)
+{
+ int i;
+ struct pci_dev *host;
+
+ for (i = 0; i < ARRAY_SIZE(mch_quirk_devices); i++) {
+ host = pci_get_device(PCI_VENDOR_ID_INTEL, mch_quirk_devices[i],
+ NULL);
+ if (host)
+ return host;
+ }
+ return NULL;
+}
+
+static void quirk_intel_mch(struct pnp_dev *dev)
+{
+ struct pci_dev *host;
+ u32 addr_lo, addr_hi;
+ struct pci_bus_region region;
+ struct resource mch;
+ struct pnp_resource *pnp_res;
+ struct resource *res;
+
+ host = get_intel_host();
+ if (!host)
+ return;
+
+ /*
+ * MCHBAR is not an architected PCI BAR, so MCH space is usually
+ * reported as a PNP0C02 resource. The MCH space was originally
+ * 16KB, but is 32KB in newer parts. Some BIOSes still report a
+ * PNP0C02 resource that is only 16KB, which means the rest of the
+ * MCH space is consumed but unreported.
+ */
+
+ /*
+ * Read MCHBAR for Host Member Mapped Register Range Base
+ * https://www-ssl.intel.com/content/www/us/en/processors/core/4th-gen-core-family-desktop-vol-2-datasheet
+ * Sec 3.1.12.
+ */
+ pci_read_config_dword(host, 0x48, &addr_lo);
+ region.start = addr_lo & ~0x7fff;
+ pci_read_config_dword(host, 0x4c, &addr_hi);
+ region.start |= (u64) addr_hi << 32;
+ region.end = region.start + 32*1024 - 1;
+
+ memset(&mch, 0, sizeof(mch));
+ mch.flags = IORESOURCE_MEM;
+ pcibios_bus_to_resource(host->bus, &mch, ®ion);
+
+ list_for_each_entry(pnp_res, &dev->resources, list) {
+ res = &pnp_res->res;
+ if (res->end < mch.start || res->start > mch.end)
+ continue; /* no overlap */
+ if (res->start == mch.start && res->end == mch.end)
+ continue; /* exact match */
+
+ dev_info(&dev->dev, FW_BUG "PNP resource %pR covers only part of %s Intel MCH; extending to %pR\n",
+ res, pci_name(host), &mch);
+ res->start = mch.start;
+ res->end = mch.end;
+ break;
+ }
+
+ pci_dev_put(host);
+}
+#endif
+
+/*
+ * PnP Quirks
+ * Cards or devices that need some tweaking due to incomplete resource info
+ */
+
+static struct pnp_fixup pnp_fixups[] = {
+ /* Soundblaster awe io port quirk */
+ {"CTL0021", quirk_awe32_resources},
+ {"CTL0022", quirk_awe32_resources},
+ {"CTL0023", quirk_awe32_resources},
+ /* CMI 8330 interrupt and dma fix */
+ {"@X@0001", quirk_cmi8330_resources},
+ /* Soundblaster audio device io port range quirk */
+ {"CTL0001", quirk_sb16audio_resources},
+ {"CTL0031", quirk_sb16audio_resources},
+ {"CTL0041", quirk_sb16audio_resources},
+ {"CTL0042", quirk_sb16audio_resources},
+ {"CTL0043", quirk_sb16audio_resources},
+ {"CTL0044", quirk_sb16audio_resources},
+ {"CTL0045", quirk_sb16audio_resources},
+ /* Add IRQ-optional MPU options */
+ {"ADS7151", quirk_ad1815_mpu_resources},
+ {"ADS7181", quirk_add_irq_optional_dependent_sets},
+ {"AZT0002", quirk_add_irq_optional_dependent_sets},
+ /* PnP resources that might overlap PCI BARs */
+ {"PNP0c01", quirk_system_pci_resources},
+ {"PNP0c02", quirk_system_pci_resources},
+#ifdef CONFIG_AMD_NB
+ {"PNP0c01", quirk_amd_mmconfig_area},
+#endif
+#ifdef CONFIG_PCI
+ {"PNP0c02", quirk_intel_mch},
+#endif
+ {""}
+};
+
+void pnp_fixup_device(struct pnp_dev *dev)
+{
+ struct pnp_fixup *f;
+
+ for (f = pnp_fixups; *f->id; f++) {
+ if (!compare_pnp_id(dev->id, f->id))
+ continue;
+ pnp_dbg(&dev->dev, "%s: calling %pF\n", f->id,
+ f->quirk_function);
+ f->quirk_function(dev);
+ }
+}
diff --git a/drivers/pnp/resource.c b/drivers/pnp/resource.c
new file mode 100644
index 0000000..70d4ba9
--- /dev/null
+++ b/drivers/pnp/resource.c
@@ -0,0 +1,754 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * resource.c - Contains functions for registering and analyzing resource information
+ *
+ * based on isapnp.c resource management (c) Jaroslav Kysela <perex@perex.cz>
+ * Copyright 2003 Adam Belay <ambx1@neo.rr.com>
+ * Copyright (C) 2008 Hewlett-Packard Development Company, L.P.
+ * Bjorn Helgaas <bjorn.helgaas@hp.com>
+ */
+
+#include <linux/module.h>
+#include <linux/slab.h>
+#include <linux/errno.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <asm/io.h>
+#include <asm/dma.h>
+#include <asm/irq.h>
+#include <linux/pci.h>
+#include <linux/ioport.h>
+#include <linux/init.h>
+
+#include <linux/pnp.h>
+#include "base.h"
+
+static int pnp_reserve_irq[16] = {[0 ... 15] = -1 }; /* reserve (don't use) some IRQ */
+static int pnp_reserve_dma[8] = {[0 ... 7] = -1 }; /* reserve (don't use) some DMA */
+static int pnp_reserve_io[16] = {[0 ... 15] = -1 }; /* reserve (don't use) some I/O region */
+static int pnp_reserve_mem[16] = {[0 ... 15] = -1 }; /* reserve (don't use) some memory region */
+
+/*
+ * option registration
+ */
+
+static struct pnp_option *pnp_build_option(struct pnp_dev *dev, unsigned long type,
+ unsigned int option_flags)
+{
+ struct pnp_option *option;
+
+ option = kzalloc(sizeof(struct pnp_option), GFP_KERNEL);
+ if (!option)
+ return NULL;
+
+ option->flags = option_flags;
+ option->type = type;
+
+ list_add_tail(&option->list, &dev->options);
+ return option;
+}
+
+int pnp_register_irq_resource(struct pnp_dev *dev, unsigned int option_flags,
+ pnp_irq_mask_t *map, unsigned char flags)
+{
+ struct pnp_option *option;
+ struct pnp_irq *irq;
+
+ option = pnp_build_option(dev, IORESOURCE_IRQ, option_flags);
+ if (!option)
+ return -ENOMEM;
+
+ irq = &option->u.irq;
+ irq->map = *map;
+ irq->flags = flags;
+
+#ifdef CONFIG_PCI
+ {
+ int i;
+
+ for (i = 0; i < 16; i++)
+ if (test_bit(i, irq->map.bits))
+ pcibios_penalize_isa_irq(i, 0);
+ }
+#endif
+
+ dbg_pnp_show_option(dev, option);
+ return 0;
+}
+
+int pnp_register_dma_resource(struct pnp_dev *dev, unsigned int option_flags,
+ unsigned char map, unsigned char flags)
+{
+ struct pnp_option *option;
+ struct pnp_dma *dma;
+
+ option = pnp_build_option(dev, IORESOURCE_DMA, option_flags);
+ if (!option)
+ return -ENOMEM;
+
+ dma = &option->u.dma;
+ dma->map = map;
+ dma->flags = flags;
+
+ dbg_pnp_show_option(dev, option);
+ return 0;
+}
+
+int pnp_register_port_resource(struct pnp_dev *dev, unsigned int option_flags,
+ resource_size_t min, resource_size_t max,
+ resource_size_t align, resource_size_t size,
+ unsigned char flags)
+{
+ struct pnp_option *option;
+ struct pnp_port *port;
+
+ option = pnp_build_option(dev, IORESOURCE_IO, option_flags);
+ if (!option)
+ return -ENOMEM;
+
+ port = &option->u.port;
+ port->min = min;
+ port->max = max;
+ port->align = align;
+ port->size = size;
+ port->flags = flags;
+
+ dbg_pnp_show_option(dev, option);
+ return 0;
+}
+
+int pnp_register_mem_resource(struct pnp_dev *dev, unsigned int option_flags,
+ resource_size_t min, resource_size_t max,
+ resource_size_t align, resource_size_t size,
+ unsigned char flags)
+{
+ struct pnp_option *option;
+ struct pnp_mem *mem;
+
+ option = pnp_build_option(dev, IORESOURCE_MEM, option_flags);
+ if (!option)
+ return -ENOMEM;
+
+ mem = &option->u.mem;
+ mem->min = min;
+ mem->max = max;
+ mem->align = align;
+ mem->size = size;
+ mem->flags = flags;
+
+ dbg_pnp_show_option(dev, option);
+ return 0;
+}
+
+void pnp_free_options(struct pnp_dev *dev)
+{
+ struct pnp_option *option, *tmp;
+
+ list_for_each_entry_safe(option, tmp, &dev->options, list) {
+ list_del(&option->list);
+ kfree(option);
+ }
+}
+
+/*
+ * resource validity checking
+ */
+
+#define length(start, end) (*(end) - *(start) + 1)
+
+/* Two ranges conflict if one doesn't end before the other starts */
+#define ranged_conflict(starta, enda, startb, endb) \
+ !((*(enda) < *(startb)) || (*(endb) < *(starta)))
+
+#define cannot_compare(flags) \
+((flags) & IORESOURCE_DISABLED)
+
+int pnp_check_port(struct pnp_dev *dev, struct resource *res)
+{
+ int i;
+ struct pnp_dev *tdev;
+ struct resource *tres;
+ resource_size_t *port, *end, *tport, *tend;
+
+ port = &res->start;
+ end = &res->end;
+
+ /* if the resource doesn't exist, don't complain about it */
+ if (cannot_compare(res->flags))
+ return 1;
+
+ /* check if the resource is already in use, skip if the
+ * device is active because it itself may be in use */
+ if (!dev->active) {
+ if (!request_region(*port, length(port, end), "pnp"))
+ return 0;
+ release_region(*port, length(port, end));
+ }
+
+ /* check if the resource is reserved */
+ for (i = 0; i < 8; i++) {
+ int rport = pnp_reserve_io[i << 1];
+ int rend = pnp_reserve_io[(i << 1) + 1] + rport - 1;
+ if (ranged_conflict(port, end, &rport, &rend))
+ return 0;
+ }
+
+ /* check for internal conflicts */
+ for (i = 0; (tres = pnp_get_resource(dev, IORESOURCE_IO, i)); i++) {
+ if (tres != res && tres->flags & IORESOURCE_IO) {
+ tport = &tres->start;
+ tend = &tres->end;
+ if (ranged_conflict(port, end, tport, tend))
+ return 0;
+ }
+ }
+
+ /* check for conflicts with other pnp devices */
+ pnp_for_each_dev(tdev) {
+ if (tdev == dev)
+ continue;
+ for (i = 0;
+ (tres = pnp_get_resource(tdev, IORESOURCE_IO, i));
+ i++) {
+ if (tres->flags & IORESOURCE_IO) {
+ if (cannot_compare(tres->flags))
+ continue;
+ if (tres->flags & IORESOURCE_WINDOW)
+ continue;
+ tport = &tres->start;
+ tend = &tres->end;
+ if (ranged_conflict(port, end, tport, tend))
+ return 0;
+ }
+ }
+ }
+
+ return 1;
+}
+
+int pnp_check_mem(struct pnp_dev *dev, struct resource *res)
+{
+ int i;
+ struct pnp_dev *tdev;
+ struct resource *tres;
+ resource_size_t *addr, *end, *taddr, *tend;
+
+ addr = &res->start;
+ end = &res->end;
+
+ /* if the resource doesn't exist, don't complain about it */
+ if (cannot_compare(res->flags))
+ return 1;
+
+ /* check if the resource is already in use, skip if the
+ * device is active because it itself may be in use */
+ if (!dev->active) {
+ if (!request_mem_region(*addr, length(addr, end), "pnp"))
+ return 0;
+ release_mem_region(*addr, length(addr, end));
+ }
+
+ /* check if the resource is reserved */
+ for (i = 0; i < 8; i++) {
+ int raddr = pnp_reserve_mem[i << 1];
+ int rend = pnp_reserve_mem[(i << 1) + 1] + raddr - 1;
+ if (ranged_conflict(addr, end, &raddr, &rend))
+ return 0;
+ }
+
+ /* check for internal conflicts */
+ for (i = 0; (tres = pnp_get_resource(dev, IORESOURCE_MEM, i)); i++) {
+ if (tres != res && tres->flags & IORESOURCE_MEM) {
+ taddr = &tres->start;
+ tend = &tres->end;
+ if (ranged_conflict(addr, end, taddr, tend))
+ return 0;
+ }
+ }
+
+ /* check for conflicts with other pnp devices */
+ pnp_for_each_dev(tdev) {
+ if (tdev == dev)
+ continue;
+ for (i = 0;
+ (tres = pnp_get_resource(tdev, IORESOURCE_MEM, i));
+ i++) {
+ if (tres->flags & IORESOURCE_MEM) {
+ if (cannot_compare(tres->flags))
+ continue;
+ if (tres->flags & IORESOURCE_WINDOW)
+ continue;
+ taddr = &tres->start;
+ tend = &tres->end;
+ if (ranged_conflict(addr, end, taddr, tend))
+ return 0;
+ }
+ }
+ }
+
+ return 1;
+}
+
+static irqreturn_t pnp_test_handler(int irq, void *dev_id)
+{
+ return IRQ_HANDLED;
+}
+
+#ifdef CONFIG_PCI
+static int pci_dev_uses_irq(struct pnp_dev *pnp, struct pci_dev *pci,
+ unsigned int irq)
+{
+ u32 class;
+ u8 progif;
+
+ if (pci->irq == irq) {
+ pnp_dbg(&pnp->dev, " device %s using irq %d\n",
+ pci_name(pci), irq);
+ return 1;
+ }
+
+ /*
+ * See pci_setup_device() and ata_pci_sff_activate_host() for
+ * similar IDE legacy detection.
+ */
+ pci_read_config_dword(pci, PCI_CLASS_REVISION, &class);
+ class >>= 8; /* discard revision ID */
+ progif = class & 0xff;
+ class >>= 8;
+
+ if (class == PCI_CLASS_STORAGE_IDE) {
+ /*
+ * Unless both channels are native-PCI mode only,
+ * treat the compatibility IRQs as busy.
+ */
+ if ((progif & 0x5) != 0x5)
+ if (pci_get_legacy_ide_irq(pci, 0) == irq ||
+ pci_get_legacy_ide_irq(pci, 1) == irq) {
+ pnp_dbg(&pnp->dev, " legacy IDE device %s "
+ "using irq %d\n", pci_name(pci), irq);
+ return 1;
+ }
+ }
+
+ return 0;
+}
+#endif
+
+static int pci_uses_irq(struct pnp_dev *pnp, unsigned int irq)
+{
+#ifdef CONFIG_PCI
+ struct pci_dev *pci = NULL;
+
+ for_each_pci_dev(pci) {
+ if (pci_dev_uses_irq(pnp, pci, irq)) {
+ pci_dev_put(pci);
+ return 1;
+ }
+ }
+#endif
+ return 0;
+}
+
+int pnp_check_irq(struct pnp_dev *dev, struct resource *res)
+{
+ int i;
+ struct pnp_dev *tdev;
+ struct resource *tres;
+ resource_size_t *irq;
+
+ irq = &res->start;
+
+ /* if the resource doesn't exist, don't complain about it */
+ if (cannot_compare(res->flags))
+ return 1;
+
+ /* check if the resource is valid */
+ if (*irq > 15)
+ return 0;
+
+ /* check if the resource is reserved */
+ for (i = 0; i < 16; i++) {
+ if (pnp_reserve_irq[i] == *irq)
+ return 0;
+ }
+
+ /* check for internal conflicts */
+ for (i = 0; (tres = pnp_get_resource(dev, IORESOURCE_IRQ, i)); i++) {
+ if (tres != res && tres->flags & IORESOURCE_IRQ) {
+ if (tres->start == *irq)
+ return 0;
+ }
+ }
+
+ /* check if the resource is being used by a pci device */
+ if (pci_uses_irq(dev, *irq))
+ return 0;
+
+ /* check if the resource is already in use, skip if the
+ * device is active because it itself may be in use */
+ if (!dev->active) {
+ if (request_irq(*irq, pnp_test_handler,
+ IRQF_PROBE_SHARED, "pnp", NULL))
+ return 0;
+ free_irq(*irq, NULL);
+ }
+
+ /* check for conflicts with other pnp devices */
+ pnp_for_each_dev(tdev) {
+ if (tdev == dev)
+ continue;
+ for (i = 0;
+ (tres = pnp_get_resource(tdev, IORESOURCE_IRQ, i));
+ i++) {
+ if (tres->flags & IORESOURCE_IRQ) {
+ if (cannot_compare(tres->flags))
+ continue;
+ if (tres->start == *irq)
+ return 0;
+ }
+ }
+ }
+
+ return 1;
+}
+
+#ifdef CONFIG_ISA_DMA_API
+int pnp_check_dma(struct pnp_dev *dev, struct resource *res)
+{
+ int i;
+ struct pnp_dev *tdev;
+ struct resource *tres;
+ resource_size_t *dma;
+
+ dma = &res->start;
+
+ /* if the resource doesn't exist, don't complain about it */
+ if (cannot_compare(res->flags))
+ return 1;
+
+ /* check if the resource is valid */
+ if (*dma == 4 || *dma > 7)
+ return 0;
+
+ /* check if the resource is reserved */
+ for (i = 0; i < 8; i++) {
+ if (pnp_reserve_dma[i] == *dma)
+ return 0;
+ }
+
+ /* check for internal conflicts */
+ for (i = 0; (tres = pnp_get_resource(dev, IORESOURCE_DMA, i)); i++) {
+ if (tres != res && tres->flags & IORESOURCE_DMA) {
+ if (tres->start == *dma)
+ return 0;
+ }
+ }
+
+ /* check if the resource is already in use, skip if the
+ * device is active because it itself may be in use */
+ if (!dev->active) {
+ if (request_dma(*dma, "pnp"))
+ return 0;
+ free_dma(*dma);
+ }
+
+ /* check for conflicts with other pnp devices */
+ pnp_for_each_dev(tdev) {
+ if (tdev == dev)
+ continue;
+ for (i = 0;
+ (tres = pnp_get_resource(tdev, IORESOURCE_DMA, i));
+ i++) {
+ if (tres->flags & IORESOURCE_DMA) {
+ if (cannot_compare(tres->flags))
+ continue;
+ if (tres->start == *dma)
+ return 0;
+ }
+ }
+ }
+
+ return 1;
+}
+#endif /* CONFIG_ISA_DMA_API */
+
+unsigned long pnp_resource_type(struct resource *res)
+{
+ return res->flags & (IORESOURCE_IO | IORESOURCE_MEM |
+ IORESOURCE_IRQ | IORESOURCE_DMA |
+ IORESOURCE_BUS);
+}
+
+struct resource *pnp_get_resource(struct pnp_dev *dev,
+ unsigned long type, unsigned int num)
+{
+ struct pnp_resource *pnp_res;
+ struct resource *res;
+
+ list_for_each_entry(pnp_res, &dev->resources, list) {
+ res = &pnp_res->res;
+ if (pnp_resource_type(res) == type && num-- == 0)
+ return res;
+ }
+ return NULL;
+}
+EXPORT_SYMBOL(pnp_get_resource);
+
+static struct pnp_resource *pnp_new_resource(struct pnp_dev *dev)
+{
+ struct pnp_resource *pnp_res;
+
+ pnp_res = kzalloc(sizeof(struct pnp_resource), GFP_KERNEL);
+ if (!pnp_res)
+ return NULL;
+
+ list_add_tail(&pnp_res->list, &dev->resources);
+ return pnp_res;
+}
+
+struct pnp_resource *pnp_add_resource(struct pnp_dev *dev,
+ struct resource *res)
+{
+ struct pnp_resource *pnp_res;
+
+ pnp_res = pnp_new_resource(dev);
+ if (!pnp_res) {
+ dev_err(&dev->dev, "can't add resource %pR\n", res);
+ return NULL;
+ }
+
+ pnp_res->res = *res;
+ pnp_res->res.name = dev->name;
+ dev_dbg(&dev->dev, "%pR\n", res);
+ return pnp_res;
+}
+
+struct pnp_resource *pnp_add_irq_resource(struct pnp_dev *dev, int irq,
+ int flags)
+{
+ struct pnp_resource *pnp_res;
+ struct resource *res;
+
+ pnp_res = pnp_new_resource(dev);
+ if (!pnp_res) {
+ dev_err(&dev->dev, "can't add resource for IRQ %d\n", irq);
+ return NULL;
+ }
+
+ res = &pnp_res->res;
+ res->flags = IORESOURCE_IRQ | flags;
+ res->start = irq;
+ res->end = irq;
+
+ dev_printk(KERN_DEBUG, &dev->dev, "%pR\n", res);
+ return pnp_res;
+}
+
+struct pnp_resource *pnp_add_dma_resource(struct pnp_dev *dev, int dma,
+ int flags)
+{
+ struct pnp_resource *pnp_res;
+ struct resource *res;
+
+ pnp_res = pnp_new_resource(dev);
+ if (!pnp_res) {
+ dev_err(&dev->dev, "can't add resource for DMA %d\n", dma);
+ return NULL;
+ }
+
+ res = &pnp_res->res;
+ res->flags = IORESOURCE_DMA | flags;
+ res->start = dma;
+ res->end = dma;
+
+ dev_printk(KERN_DEBUG, &dev->dev, "%pR\n", res);
+ return pnp_res;
+}
+
+struct pnp_resource *pnp_add_io_resource(struct pnp_dev *dev,
+ resource_size_t start,
+ resource_size_t end, int flags)
+{
+ struct pnp_resource *pnp_res;
+ struct resource *res;
+
+ pnp_res = pnp_new_resource(dev);
+ if (!pnp_res) {
+ dev_err(&dev->dev, "can't add resource for IO %#llx-%#llx\n",
+ (unsigned long long) start,
+ (unsigned long long) end);
+ return NULL;
+ }
+
+ res = &pnp_res->res;
+ res->flags = IORESOURCE_IO | flags;
+ res->start = start;
+ res->end = end;
+
+ dev_printk(KERN_DEBUG, &dev->dev, "%pR\n", res);
+ return pnp_res;
+}
+
+struct pnp_resource *pnp_add_mem_resource(struct pnp_dev *dev,
+ resource_size_t start,
+ resource_size_t end, int flags)
+{
+ struct pnp_resource *pnp_res;
+ struct resource *res;
+
+ pnp_res = pnp_new_resource(dev);
+ if (!pnp_res) {
+ dev_err(&dev->dev, "can't add resource for MEM %#llx-%#llx\n",
+ (unsigned long long) start,
+ (unsigned long long) end);
+ return NULL;
+ }
+
+ res = &pnp_res->res;
+ res->flags = IORESOURCE_MEM | flags;
+ res->start = start;
+ res->end = end;
+
+ dev_printk(KERN_DEBUG, &dev->dev, "%pR\n", res);
+ return pnp_res;
+}
+
+struct pnp_resource *pnp_add_bus_resource(struct pnp_dev *dev,
+ resource_size_t start,
+ resource_size_t end)
+{
+ struct pnp_resource *pnp_res;
+ struct resource *res;
+
+ pnp_res = pnp_new_resource(dev);
+ if (!pnp_res) {
+ dev_err(&dev->dev, "can't add resource for BUS %#llx-%#llx\n",
+ (unsigned long long) start,
+ (unsigned long long) end);
+ return NULL;
+ }
+
+ res = &pnp_res->res;
+ res->flags = IORESOURCE_BUS;
+ res->start = start;
+ res->end = end;
+
+ dev_printk(KERN_DEBUG, &dev->dev, "%pR\n", res);
+ return pnp_res;
+}
+
+/*
+ * Determine whether the specified resource is a possible configuration
+ * for this device.
+ */
+int pnp_possible_config(struct pnp_dev *dev, int type, resource_size_t start,
+ resource_size_t size)
+{
+ struct pnp_option *option;
+ struct pnp_port *port;
+ struct pnp_mem *mem;
+ struct pnp_irq *irq;
+ struct pnp_dma *dma;
+
+ list_for_each_entry(option, &dev->options, list) {
+ if (option->type != type)
+ continue;
+
+ switch (option->type) {
+ case IORESOURCE_IO:
+ port = &option->u.port;
+ if (port->min == start && port->size == size)
+ return 1;
+ break;
+ case IORESOURCE_MEM:
+ mem = &option->u.mem;
+ if (mem->min == start && mem->size == size)
+ return 1;
+ break;
+ case IORESOURCE_IRQ:
+ irq = &option->u.irq;
+ if (start < PNP_IRQ_NR &&
+ test_bit(start, irq->map.bits))
+ return 1;
+ break;
+ case IORESOURCE_DMA:
+ dma = &option->u.dma;
+ if (dma->map & (1 << start))
+ return 1;
+ break;
+ }
+ }
+
+ return 0;
+}
+EXPORT_SYMBOL(pnp_possible_config);
+
+int pnp_range_reserved(resource_size_t start, resource_size_t end)
+{
+ struct pnp_dev *dev;
+ struct pnp_resource *pnp_res;
+ resource_size_t *dev_start, *dev_end;
+
+ pnp_for_each_dev(dev) {
+ list_for_each_entry(pnp_res, &dev->resources, list) {
+ dev_start = &pnp_res->res.start;
+ dev_end = &pnp_res->res.end;
+ if (ranged_conflict(&start, &end, dev_start, dev_end))
+ return 1;
+ }
+ }
+ return 0;
+}
+EXPORT_SYMBOL(pnp_range_reserved);
+
+/* format is: pnp_reserve_irq=irq1[,irq2] .... */
+static int __init pnp_setup_reserve_irq(char *str)
+{
+ int i;
+
+ for (i = 0; i < 16; i++)
+ if (get_option(&str, &pnp_reserve_irq[i]) != 2)
+ break;
+ return 1;
+}
+
+__setup("pnp_reserve_irq=", pnp_setup_reserve_irq);
+
+/* format is: pnp_reserve_dma=dma1[,dma2] .... */
+static int __init pnp_setup_reserve_dma(char *str)
+{
+ int i;
+
+ for (i = 0; i < 8; i++)
+ if (get_option(&str, &pnp_reserve_dma[i]) != 2)
+ break;
+ return 1;
+}
+
+__setup("pnp_reserve_dma=", pnp_setup_reserve_dma);
+
+/* format is: pnp_reserve_io=io1,size1[,io2,size2] .... */
+static int __init pnp_setup_reserve_io(char *str)
+{
+ int i;
+
+ for (i = 0; i < 16; i++)
+ if (get_option(&str, &pnp_reserve_io[i]) != 2)
+ break;
+ return 1;
+}
+
+__setup("pnp_reserve_io=", pnp_setup_reserve_io);
+
+/* format is: pnp_reserve_mem=mem1,size1[,mem2,size2] .... */
+static int __init pnp_setup_reserve_mem(char *str)
+{
+ int i;
+
+ for (i = 0; i < 16; i++)
+ if (get_option(&str, &pnp_reserve_mem[i]) != 2)
+ break;
+ return 1;
+}
+
+__setup("pnp_reserve_mem=", pnp_setup_reserve_mem);
diff --git a/drivers/pnp/support.c b/drivers/pnp/support.c
new file mode 100644
index 0000000..e4f53d3
--- /dev/null
+++ b/drivers/pnp/support.c
@@ -0,0 +1,179 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * support.c - standard functions for the use of pnp protocol drivers
+ *
+ * Copyright 2003 Adam Belay <ambx1@neo.rr.com>
+ * Copyright (C) 2008 Hewlett-Packard Development Company, L.P.
+ * Bjorn Helgaas <bjorn.helgaas@hp.com>
+ */
+
+#include <linux/module.h>
+#include <linux/ctype.h>
+#include <linux/pnp.h>
+#include "base.h"
+
+/**
+ * pnp_is_active - Determines if a device is active based on its current
+ * resources
+ * @dev: pointer to the desired PnP device
+ */
+int pnp_is_active(struct pnp_dev *dev)
+{
+ /*
+ * I don't think this is very reliable because pnp_disable_dev()
+ * only clears out auto-assigned resources.
+ */
+ if (!pnp_port_start(dev, 0) && pnp_port_len(dev, 0) <= 1 &&
+ !pnp_mem_start(dev, 0) && pnp_mem_len(dev, 0) <= 1 &&
+ pnp_irq(dev, 0) == -1 && pnp_dma(dev, 0) == -1)
+ return 0;
+ else
+ return 1;
+}
+
+EXPORT_SYMBOL(pnp_is_active);
+
+/*
+ * Functionally similar to acpi_ex_eisa_id_to_string(), but that's
+ * buried in the ACPI CA, and we can't depend on it being present.
+ */
+void pnp_eisa_id_to_string(u32 id, char *str)
+{
+ id = be32_to_cpu(id);
+
+ /*
+ * According to the specs, the first three characters are five-bit
+ * compressed ASCII, and the left-over high order bit should be zero.
+ * However, the Linux ISAPNP code historically used six bits for the
+ * first character, and there seem to be IDs that depend on that,
+ * e.g., "nEC8241" in the Linux 8250_pnp serial driver and the
+ * FreeBSD sys/pc98/cbus/sio_cbus.c driver.
+ */
+ str[0] = 'A' + ((id >> 26) & 0x3f) - 1;
+ str[1] = 'A' + ((id >> 21) & 0x1f) - 1;
+ str[2] = 'A' + ((id >> 16) & 0x1f) - 1;
+ str[3] = hex_asc_hi(id >> 8);
+ str[4] = hex_asc_lo(id >> 8);
+ str[5] = hex_asc_hi(id);
+ str[6] = hex_asc_lo(id);
+ str[7] = '\0';
+}
+
+char *pnp_resource_type_name(struct resource *res)
+{
+ switch (pnp_resource_type(res)) {
+ case IORESOURCE_IO:
+ return "io";
+ case IORESOURCE_MEM:
+ return "mem";
+ case IORESOURCE_IRQ:
+ return "irq";
+ case IORESOURCE_DMA:
+ return "dma";
+ case IORESOURCE_BUS:
+ return "bus";
+ }
+ return "unknown";
+}
+
+void dbg_pnp_show_resources(struct pnp_dev *dev, char *desc)
+{
+ struct pnp_resource *pnp_res;
+
+ if (list_empty(&dev->resources))
+ pnp_dbg(&dev->dev, "%s: no current resources\n", desc);
+ else {
+ pnp_dbg(&dev->dev, "%s: current resources:\n", desc);
+ list_for_each_entry(pnp_res, &dev->resources, list)
+ pnp_dbg(&dev->dev, "%pr\n", &pnp_res->res);
+ }
+}
+
+char *pnp_option_priority_name(struct pnp_option *option)
+{
+ switch (pnp_option_priority(option)) {
+ case PNP_RES_PRIORITY_PREFERRED:
+ return "preferred";
+ case PNP_RES_PRIORITY_ACCEPTABLE:
+ return "acceptable";
+ case PNP_RES_PRIORITY_FUNCTIONAL:
+ return "functional";
+ }
+ return "invalid";
+}
+
+void dbg_pnp_show_option(struct pnp_dev *dev, struct pnp_option *option)
+{
+ char buf[128];
+ int len = 0, i;
+ struct pnp_port *port;
+ struct pnp_mem *mem;
+ struct pnp_irq *irq;
+ struct pnp_dma *dma;
+
+ if (pnp_option_is_dependent(option))
+ len += scnprintf(buf + len, sizeof(buf) - len,
+ " dependent set %d (%s) ",
+ pnp_option_set(option),
+ pnp_option_priority_name(option));
+ else
+ len += scnprintf(buf + len, sizeof(buf) - len,
+ " independent ");
+
+ switch (option->type) {
+ case IORESOURCE_IO:
+ port = &option->u.port;
+ len += scnprintf(buf + len, sizeof(buf) - len, "io min %#llx "
+ "max %#llx align %lld size %lld flags %#x",
+ (unsigned long long) port->min,
+ (unsigned long long) port->max,
+ (unsigned long long) port->align,
+ (unsigned long long) port->size, port->flags);
+ break;
+ case IORESOURCE_MEM:
+ mem = &option->u.mem;
+ len += scnprintf(buf + len, sizeof(buf) - len, "mem min %#llx "
+ "max %#llx align %lld size %lld flags %#x",
+ (unsigned long long) mem->min,
+ (unsigned long long) mem->max,
+ (unsigned long long) mem->align,
+ (unsigned long long) mem->size, mem->flags);
+ break;
+ case IORESOURCE_IRQ:
+ irq = &option->u.irq;
+ len += scnprintf(buf + len, sizeof(buf) - len, "irq");
+ if (bitmap_empty(irq->map.bits, PNP_IRQ_NR))
+ len += scnprintf(buf + len, sizeof(buf) - len,
+ " <none>");
+ else {
+ for (i = 0; i < PNP_IRQ_NR; i++)
+ if (test_bit(i, irq->map.bits))
+ len += scnprintf(buf + len,
+ sizeof(buf) - len,
+ " %d", i);
+ }
+ len += scnprintf(buf + len, sizeof(buf) - len, " flags %#x",
+ irq->flags);
+ if (irq->flags & IORESOURCE_IRQ_OPTIONAL)
+ len += scnprintf(buf + len, sizeof(buf) - len,
+ " (optional)");
+ break;
+ case IORESOURCE_DMA:
+ dma = &option->u.dma;
+ len += scnprintf(buf + len, sizeof(buf) - len, "dma");
+ if (!dma->map)
+ len += scnprintf(buf + len, sizeof(buf) - len,
+ " <none>");
+ else {
+ for (i = 0; i < 8; i++)
+ if (dma->map & (1 << i))
+ len += scnprintf(buf + len,
+ sizeof(buf) - len,
+ " %d", i);
+ }
+ len += scnprintf(buf + len, sizeof(buf) - len, " (bitmask %#x) "
+ "flags %#x", dma->map, dma->flags);
+ break;
+ }
+ pnp_dbg(&dev->dev, "%s\n", buf);
+}
diff --git a/drivers/pnp/system.c b/drivers/pnp/system.c
new file mode 100644
index 0000000..6950503
--- /dev/null
+++ b/drivers/pnp/system.c
@@ -0,0 +1,113 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * system.c - a driver for reserving pnp system resources
+ *
+ * Some code is based on pnpbios_core.c
+ * Copyright 2002 Adam Belay <ambx1@neo.rr.com>
+ * (c) Copyright 2007 Hewlett-Packard Development Company, L.P.
+ * Bjorn Helgaas <bjorn.helgaas@hp.com>
+ */
+
+#include <linux/pnp.h>
+#include <linux/device.h>
+#include <linux/init.h>
+#include <linux/slab.h>
+#include <linux/kernel.h>
+#include <linux/ioport.h>
+
+static const struct pnp_device_id pnp_dev_table[] = {
+ /* General ID for reserving resources */
+ {"PNP0c02", 0},
+ /* memory controller */
+ {"PNP0c01", 0},
+ {"", 0}
+};
+
+static void reserve_range(struct pnp_dev *dev, struct resource *r, int port)
+{
+ char *regionid;
+ const char *pnpid = dev_name(&dev->dev);
+ resource_size_t start = r->start, end = r->end;
+ struct resource *res;
+
+ regionid = kmalloc(16, GFP_KERNEL);
+ if (!regionid)
+ return;
+
+ snprintf(regionid, 16, "pnp %s", pnpid);
+ if (port)
+ res = request_region(start, end - start + 1, regionid);
+ else
+ res = request_mem_region(start, end - start + 1, regionid);
+ if (res)
+ res->flags &= ~IORESOURCE_BUSY;
+ else
+ kfree(regionid);
+
+ /*
+ * Failures at this point are usually harmless. pci quirks for
+ * example do reserve stuff they know about too, so we may well
+ * have double reservations.
+ */
+ dev_info(&dev->dev, "%pR %s reserved\n", r,
+ res ? "has been" : "could not be");
+}
+
+static void reserve_resources_of_dev(struct pnp_dev *dev)
+{
+ struct resource *res;
+ int i;
+
+ for (i = 0; (res = pnp_get_resource(dev, IORESOURCE_IO, i)); i++) {
+ if (res->flags & IORESOURCE_DISABLED)
+ continue;
+ if (res->start == 0)
+ continue; /* disabled */
+ if (res->start < 0x100)
+ /*
+ * Below 0x100 is only standard PC hardware
+ * (pics, kbd, timer, dma, ...)
+ * We should not get resource conflicts there,
+ * and the kernel reserves these anyway
+ * (see arch/i386/kernel/setup.c).
+ * So, do nothing
+ */
+ continue;
+ if (res->end < res->start)
+ continue; /* invalid */
+
+ reserve_range(dev, res, 1);
+ }
+
+ for (i = 0; (res = pnp_get_resource(dev, IORESOURCE_MEM, i)); i++) {
+ if (res->flags & IORESOURCE_DISABLED)
+ continue;
+
+ reserve_range(dev, res, 0);
+ }
+}
+
+static int system_pnp_probe(struct pnp_dev *dev,
+ const struct pnp_device_id *dev_id)
+{
+ reserve_resources_of_dev(dev);
+ return 0;
+}
+
+static struct pnp_driver system_pnp_driver = {
+ .name = "system",
+ .id_table = pnp_dev_table,
+ .flags = PNP_DRIVER_RES_DO_NOT_CHANGE,
+ .probe = system_pnp_probe,
+};
+
+static int __init pnp_system_init(void)
+{
+ return pnp_register_driver(&system_pnp_driver);
+}
+
+/**
+ * Reserve motherboard resources after PCI claim BARs,
+ * but before PCI assign resources for uninitialized PCI devices
+ */
+fs_initcall(pnp_system_init);