v4.19.13 snapshot.
diff --git a/drivers/platform/x86/eeepc-laptop.c b/drivers/platform/x86/eeepc-laptop.c
new file mode 100644
index 0000000..a4bbf6e
--- /dev/null
+++ b/drivers/platform/x86/eeepc-laptop.c
@@ -0,0 +1,1539 @@
+/*
+ * eeepc-laptop.c - Asus Eee PC extras
+ *
+ * Based on asus_acpi.c as patched for the Eee PC by Asus:
+ * ftp://ftp.asus.com/pub/ASUS/EeePC/701/ASUS_ACPI_071126.rar
+ * Based on eee.c from eeepc-linux
+ *
+ * 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.
+ */
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/platform_device.h>
+#include <linux/backlight.h>
+#include <linux/fb.h>
+#include <linux/hwmon.h>
+#include <linux/hwmon-sysfs.h>
+#include <linux/slab.h>
+#include <linux/acpi.h>
+#include <linux/uaccess.h>
+#include <linux/input.h>
+#include <linux/input/sparse-keymap.h>
+#include <linux/rfkill.h>
+#include <linux/pci.h>
+#include <linux/pci_hotplug.h>
+#include <linux/leds.h>
+#include <linux/dmi.h>
+#include <acpi/video.h>
+
+#define EEEPC_LAPTOP_VERSION "0.1"
+#define EEEPC_LAPTOP_NAME "Eee PC Hotkey Driver"
+#define EEEPC_LAPTOP_FILE "eeepc"
+
+#define EEEPC_ACPI_CLASS "hotkey"
+#define EEEPC_ACPI_DEVICE_NAME "Hotkey"
+#define EEEPC_ACPI_HID "ASUS010"
+
+MODULE_AUTHOR("Corentin Chary, Eric Cooper");
+MODULE_DESCRIPTION(EEEPC_LAPTOP_NAME);
+MODULE_LICENSE("GPL");
+
+static bool hotplug_disabled;
+
+module_param(hotplug_disabled, bool, 0444);
+MODULE_PARM_DESC(hotplug_disabled,
+ "Disable hotplug for wireless device. "
+ "If your laptop need that, please report to "
+ "acpi4asus-user@lists.sourceforge.net.");
+
+/*
+ * Definitions for Asus EeePC
+ */
+#define NOTIFY_BRN_MIN 0x20
+#define NOTIFY_BRN_MAX 0x2f
+
+enum {
+ DISABLE_ASL_WLAN = 0x0001,
+ DISABLE_ASL_BLUETOOTH = 0x0002,
+ DISABLE_ASL_IRDA = 0x0004,
+ DISABLE_ASL_CAMERA = 0x0008,
+ DISABLE_ASL_TV = 0x0010,
+ DISABLE_ASL_GPS = 0x0020,
+ DISABLE_ASL_DISPLAYSWITCH = 0x0040,
+ DISABLE_ASL_MODEM = 0x0080,
+ DISABLE_ASL_CARDREADER = 0x0100,
+ DISABLE_ASL_3G = 0x0200,
+ DISABLE_ASL_WIMAX = 0x0400,
+ DISABLE_ASL_HWCF = 0x0800
+};
+
+enum {
+ CM_ASL_WLAN = 0,
+ CM_ASL_BLUETOOTH,
+ CM_ASL_IRDA,
+ CM_ASL_1394,
+ CM_ASL_CAMERA,
+ CM_ASL_TV,
+ CM_ASL_GPS,
+ CM_ASL_DVDROM,
+ CM_ASL_DISPLAYSWITCH,
+ CM_ASL_PANELBRIGHT,
+ CM_ASL_BIOSFLASH,
+ CM_ASL_ACPIFLASH,
+ CM_ASL_CPUFV,
+ CM_ASL_CPUTEMPERATURE,
+ CM_ASL_FANCPU,
+ CM_ASL_FANCHASSIS,
+ CM_ASL_USBPORT1,
+ CM_ASL_USBPORT2,
+ CM_ASL_USBPORT3,
+ CM_ASL_MODEM,
+ CM_ASL_CARDREADER,
+ CM_ASL_3G,
+ CM_ASL_WIMAX,
+ CM_ASL_HWCF,
+ CM_ASL_LID,
+ CM_ASL_TYPE,
+ CM_ASL_PANELPOWER, /*P901*/
+ CM_ASL_TPD
+};
+
+static const char *cm_getv[] = {
+ "WLDG", "BTHG", NULL, NULL,
+ "CAMG", NULL, NULL, NULL,
+ NULL, "PBLG", NULL, NULL,
+ "CFVG", NULL, NULL, NULL,
+ "USBG", NULL, NULL, "MODG",
+ "CRDG", "M3GG", "WIMG", "HWCF",
+ "LIDG", "TYPE", "PBPG", "TPDG"
+};
+
+static const char *cm_setv[] = {
+ "WLDS", "BTHS", NULL, NULL,
+ "CAMS", NULL, NULL, NULL,
+ "SDSP", "PBLS", "HDPS", NULL,
+ "CFVS", NULL, NULL, NULL,
+ "USBG", NULL, NULL, "MODS",
+ "CRDS", "M3GS", "WIMS", NULL,
+ NULL, NULL, "PBPS", "TPDS"
+};
+
+static const struct key_entry eeepc_keymap[] = {
+ { KE_KEY, 0x10, { KEY_WLAN } },
+ { KE_KEY, 0x11, { KEY_WLAN } },
+ { KE_KEY, 0x12, { KEY_PROG1 } },
+ { KE_KEY, 0x13, { KEY_MUTE } },
+ { KE_KEY, 0x14, { KEY_VOLUMEDOWN } },
+ { KE_KEY, 0x15, { KEY_VOLUMEUP } },
+ { KE_KEY, 0x16, { KEY_DISPLAY_OFF } },
+ { KE_KEY, 0x1a, { KEY_COFFEE } },
+ { KE_KEY, 0x1b, { KEY_ZOOM } },
+ { KE_KEY, 0x1c, { KEY_PROG2 } },
+ { KE_KEY, 0x1d, { KEY_PROG3 } },
+ { KE_KEY, NOTIFY_BRN_MIN, { KEY_BRIGHTNESSDOWN } },
+ { KE_KEY, NOTIFY_BRN_MAX, { KEY_BRIGHTNESSUP } },
+ { KE_KEY, 0x30, { KEY_SWITCHVIDEOMODE } },
+ { KE_KEY, 0x31, { KEY_SWITCHVIDEOMODE } },
+ { KE_KEY, 0x32, { KEY_SWITCHVIDEOMODE } },
+ { KE_KEY, 0x37, { KEY_F13 } }, /* Disable Touchpad */
+ { KE_KEY, 0x38, { KEY_F14 } },
+ { KE_IGNORE, 0x50, { KEY_RESERVED } }, /* AC plugged */
+ { KE_IGNORE, 0x51, { KEY_RESERVED } }, /* AC unplugged */
+ { KE_END, 0 },
+};
+
+/*
+ * This is the main structure, we can use it to store useful information
+ */
+struct eeepc_laptop {
+ acpi_handle handle; /* the handle of the acpi device */
+ u32 cm_supported; /* the control methods supported
+ by this BIOS */
+ bool cpufv_disabled;
+ bool hotplug_disabled;
+ u16 event_count[128]; /* count for each event */
+
+ struct platform_device *platform_device;
+ struct acpi_device *device; /* the device we are in */
+ struct backlight_device *backlight_device;
+
+ struct input_dev *inputdev;
+
+ struct rfkill *wlan_rfkill;
+ struct rfkill *bluetooth_rfkill;
+ struct rfkill *wwan3g_rfkill;
+ struct rfkill *wimax_rfkill;
+
+ struct hotplug_slot *hotplug_slot;
+ struct mutex hotplug_lock;
+
+ struct led_classdev tpd_led;
+ int tpd_led_wk;
+ struct workqueue_struct *led_workqueue;
+ struct work_struct tpd_led_work;
+};
+
+/*
+ * ACPI Helpers
+ */
+static int write_acpi_int(acpi_handle handle, const char *method, int val)
+{
+ acpi_status status;
+
+ status = acpi_execute_simple_method(handle, (char *)method, val);
+
+ return (status == AE_OK ? 0 : -1);
+}
+
+static int read_acpi_int(acpi_handle handle, const char *method, int *val)
+{
+ acpi_status status;
+ unsigned long long result;
+
+ status = acpi_evaluate_integer(handle, (char *)method, NULL, &result);
+ if (ACPI_FAILURE(status)) {
+ *val = -1;
+ return -1;
+ } else {
+ *val = result;
+ return 0;
+ }
+}
+
+static int set_acpi(struct eeepc_laptop *eeepc, int cm, int value)
+{
+ const char *method = cm_setv[cm];
+
+ if (method == NULL)
+ return -ENODEV;
+ if ((eeepc->cm_supported & (0x1 << cm)) == 0)
+ return -ENODEV;
+
+ if (write_acpi_int(eeepc->handle, method, value))
+ pr_warn("Error writing %s\n", method);
+ return 0;
+}
+
+static int get_acpi(struct eeepc_laptop *eeepc, int cm)
+{
+ const char *method = cm_getv[cm];
+ int value;
+
+ if (method == NULL)
+ return -ENODEV;
+ if ((eeepc->cm_supported & (0x1 << cm)) == 0)
+ return -ENODEV;
+
+ if (read_acpi_int(eeepc->handle, method, &value))
+ pr_warn("Error reading %s\n", method);
+ return value;
+}
+
+static int acpi_setter_handle(struct eeepc_laptop *eeepc, int cm,
+ acpi_handle *handle)
+{
+ const char *method = cm_setv[cm];
+ acpi_status status;
+
+ if (method == NULL)
+ return -ENODEV;
+ if ((eeepc->cm_supported & (0x1 << cm)) == 0)
+ return -ENODEV;
+
+ status = acpi_get_handle(eeepc->handle, (char *)method,
+ handle);
+ if (status != AE_OK) {
+ pr_warn("Error finding %s\n", method);
+ return -ENODEV;
+ }
+ return 0;
+}
+
+
+/*
+ * Sys helpers
+ */
+static int parse_arg(const char *buf, int *val)
+{
+ if (sscanf(buf, "%i", val) != 1)
+ return -EINVAL;
+ return 0;
+}
+
+static ssize_t store_sys_acpi(struct device *dev, int cm,
+ const char *buf, size_t count)
+{
+ struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
+ int rv, value;
+
+ rv = parse_arg(buf, &value);
+ if (rv < 0)
+ return rv;
+ rv = set_acpi(eeepc, cm, value);
+ if (rv < 0)
+ return -EIO;
+ return count;
+}
+
+static ssize_t show_sys_acpi(struct device *dev, int cm, char *buf)
+{
+ struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
+ int value = get_acpi(eeepc, cm);
+
+ if (value < 0)
+ return -EIO;
+ return sprintf(buf, "%d\n", value);
+}
+
+#define EEEPC_ACPI_SHOW_FUNC(_name, _cm) \
+ static ssize_t _name##_show(struct device *dev, \
+ struct device_attribute *attr, \
+ char *buf) \
+ { \
+ return show_sys_acpi(dev, _cm, buf); \
+ }
+
+#define EEEPC_ACPI_STORE_FUNC(_name, _cm) \
+ static ssize_t _name##_store(struct device *dev, \
+ struct device_attribute *attr, \
+ const char *buf, size_t count) \
+ { \
+ return store_sys_acpi(dev, _cm, buf, count); \
+ }
+
+#define EEEPC_CREATE_DEVICE_ATTR_RW(_name, _cm) \
+ EEEPC_ACPI_SHOW_FUNC(_name, _cm) \
+ EEEPC_ACPI_STORE_FUNC(_name, _cm) \
+ static DEVICE_ATTR_RW(_name)
+
+#define EEEPC_CREATE_DEVICE_ATTR_WO(_name, _cm) \
+ EEEPC_ACPI_STORE_FUNC(_name, _cm) \
+ static DEVICE_ATTR_WO(_name)
+
+EEEPC_CREATE_DEVICE_ATTR_RW(camera, CM_ASL_CAMERA);
+EEEPC_CREATE_DEVICE_ATTR_RW(cardr, CM_ASL_CARDREADER);
+EEEPC_CREATE_DEVICE_ATTR_WO(disp, CM_ASL_DISPLAYSWITCH);
+
+struct eeepc_cpufv {
+ int num;
+ int cur;
+};
+
+static int get_cpufv(struct eeepc_laptop *eeepc, struct eeepc_cpufv *c)
+{
+ c->cur = get_acpi(eeepc, CM_ASL_CPUFV);
+ if (c->cur < 0)
+ return -ENODEV;
+
+ c->num = (c->cur >> 8) & 0xff;
+ c->cur &= 0xff;
+ if (c->num == 0 || c->num > 12)
+ return -ENODEV;
+ return 0;
+}
+
+static ssize_t available_cpufv_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
+ struct eeepc_cpufv c;
+ int i;
+ ssize_t len = 0;
+
+ if (get_cpufv(eeepc, &c))
+ return -ENODEV;
+ for (i = 0; i < c.num; i++)
+ len += sprintf(buf + len, "%d ", i);
+ len += sprintf(buf + len, "\n");
+ return len;
+}
+
+static ssize_t cpufv_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
+ struct eeepc_cpufv c;
+
+ if (get_cpufv(eeepc, &c))
+ return -ENODEV;
+ return sprintf(buf, "%#x\n", (c.num << 8) | c.cur);
+}
+
+static ssize_t cpufv_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
+ struct eeepc_cpufv c;
+ int rv, value;
+
+ if (eeepc->cpufv_disabled)
+ return -EPERM;
+ if (get_cpufv(eeepc, &c))
+ return -ENODEV;
+ rv = parse_arg(buf, &value);
+ if (rv < 0)
+ return rv;
+ if (value < 0 || value >= c.num)
+ return -EINVAL;
+ rv = set_acpi(eeepc, CM_ASL_CPUFV, value);
+ if (rv)
+ return rv;
+ return count;
+}
+
+static ssize_t cpufv_disabled_show(struct device *dev,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
+
+ return sprintf(buf, "%d\n", eeepc->cpufv_disabled);
+}
+
+static ssize_t cpufv_disabled_store(struct device *dev,
+ struct device_attribute *attr,
+ const char *buf, size_t count)
+{
+ struct eeepc_laptop *eeepc = dev_get_drvdata(dev);
+ int rv, value;
+
+ rv = parse_arg(buf, &value);
+ if (rv < 0)
+ return rv;
+
+ switch (value) {
+ case 0:
+ if (eeepc->cpufv_disabled)
+ pr_warn("cpufv enabled (not officially supported on this model)\n");
+ eeepc->cpufv_disabled = false;
+ return count;
+ case 1:
+ return -EPERM;
+ default:
+ return -EINVAL;
+ }
+}
+
+
+static DEVICE_ATTR_RW(cpufv);
+static DEVICE_ATTR_RO(available_cpufv);
+static DEVICE_ATTR_RW(cpufv_disabled);
+
+static struct attribute *platform_attributes[] = {
+ &dev_attr_camera.attr,
+ &dev_attr_cardr.attr,
+ &dev_attr_disp.attr,
+ &dev_attr_cpufv.attr,
+ &dev_attr_available_cpufv.attr,
+ &dev_attr_cpufv_disabled.attr,
+ NULL
+};
+
+static const struct attribute_group platform_attribute_group = {
+ .attrs = platform_attributes
+};
+
+static int eeepc_platform_init(struct eeepc_laptop *eeepc)
+{
+ int result;
+
+ eeepc->platform_device = platform_device_alloc(EEEPC_LAPTOP_FILE, -1);
+ if (!eeepc->platform_device)
+ return -ENOMEM;
+ platform_set_drvdata(eeepc->platform_device, eeepc);
+
+ result = platform_device_add(eeepc->platform_device);
+ if (result)
+ goto fail_platform_device;
+
+ result = sysfs_create_group(&eeepc->platform_device->dev.kobj,
+ &platform_attribute_group);
+ if (result)
+ goto fail_sysfs;
+ return 0;
+
+fail_sysfs:
+ platform_device_del(eeepc->platform_device);
+fail_platform_device:
+ platform_device_put(eeepc->platform_device);
+ return result;
+}
+
+static void eeepc_platform_exit(struct eeepc_laptop *eeepc)
+{
+ sysfs_remove_group(&eeepc->platform_device->dev.kobj,
+ &platform_attribute_group);
+ platform_device_unregister(eeepc->platform_device);
+}
+
+/*
+ * LEDs
+ */
+/*
+ * These functions actually update the LED's, and are called from a
+ * workqueue. By doing this as separate work rather than when the LED
+ * subsystem asks, we avoid messing with the Asus ACPI stuff during a
+ * potentially bad time, such as a timer interrupt.
+ */
+static void tpd_led_update(struct work_struct *work)
+{
+ struct eeepc_laptop *eeepc;
+
+ eeepc = container_of(work, struct eeepc_laptop, tpd_led_work);
+
+ set_acpi(eeepc, CM_ASL_TPD, eeepc->tpd_led_wk);
+}
+
+static void tpd_led_set(struct led_classdev *led_cdev,
+ enum led_brightness value)
+{
+ struct eeepc_laptop *eeepc;
+
+ eeepc = container_of(led_cdev, struct eeepc_laptop, tpd_led);
+
+ eeepc->tpd_led_wk = (value > 0) ? 1 : 0;
+ queue_work(eeepc->led_workqueue, &eeepc->tpd_led_work);
+}
+
+static enum led_brightness tpd_led_get(struct led_classdev *led_cdev)
+{
+ struct eeepc_laptop *eeepc;
+
+ eeepc = container_of(led_cdev, struct eeepc_laptop, tpd_led);
+
+ return get_acpi(eeepc, CM_ASL_TPD);
+}
+
+static int eeepc_led_init(struct eeepc_laptop *eeepc)
+{
+ int rv;
+
+ if (get_acpi(eeepc, CM_ASL_TPD) == -ENODEV)
+ return 0;
+
+ eeepc->led_workqueue = create_singlethread_workqueue("led_workqueue");
+ if (!eeepc->led_workqueue)
+ return -ENOMEM;
+ INIT_WORK(&eeepc->tpd_led_work, tpd_led_update);
+
+ eeepc->tpd_led.name = "eeepc::touchpad";
+ eeepc->tpd_led.brightness_set = tpd_led_set;
+ if (get_acpi(eeepc, CM_ASL_TPD) >= 0) /* if method is available */
+ eeepc->tpd_led.brightness_get = tpd_led_get;
+ eeepc->tpd_led.max_brightness = 1;
+
+ rv = led_classdev_register(&eeepc->platform_device->dev,
+ &eeepc->tpd_led);
+ if (rv) {
+ destroy_workqueue(eeepc->led_workqueue);
+ return rv;
+ }
+
+ return 0;
+}
+
+static void eeepc_led_exit(struct eeepc_laptop *eeepc)
+{
+ if (!IS_ERR_OR_NULL(eeepc->tpd_led.dev))
+ led_classdev_unregister(&eeepc->tpd_led);
+ if (eeepc->led_workqueue)
+ destroy_workqueue(eeepc->led_workqueue);
+}
+
+
+/*
+ * PCI hotplug (for wlan rfkill)
+ */
+static bool eeepc_wlan_rfkill_blocked(struct eeepc_laptop *eeepc)
+{
+ if (get_acpi(eeepc, CM_ASL_WLAN) == 1)
+ return false;
+ return true;
+}
+
+static void eeepc_rfkill_hotplug(struct eeepc_laptop *eeepc, acpi_handle handle)
+{
+ struct pci_dev *port;
+ struct pci_dev *dev;
+ struct pci_bus *bus;
+ bool blocked = eeepc_wlan_rfkill_blocked(eeepc);
+ bool absent;
+ u32 l;
+
+ if (eeepc->wlan_rfkill)
+ rfkill_set_sw_state(eeepc->wlan_rfkill, blocked);
+
+ mutex_lock(&eeepc->hotplug_lock);
+ pci_lock_rescan_remove();
+
+ if (!eeepc->hotplug_slot)
+ goto out_unlock;
+
+ port = acpi_get_pci_dev(handle);
+ if (!port) {
+ pr_warning("Unable to find port\n");
+ goto out_unlock;
+ }
+
+ bus = port->subordinate;
+
+ if (!bus) {
+ pr_warn("Unable to find PCI bus 1?\n");
+ goto out_put_dev;
+ }
+
+ if (pci_bus_read_config_dword(bus, 0, PCI_VENDOR_ID, &l)) {
+ pr_err("Unable to read PCI config space?\n");
+ goto out_put_dev;
+ }
+
+ absent = (l == 0xffffffff);
+
+ if (blocked != absent) {
+ pr_warn("BIOS says wireless lan is %s, but the pci device is %s\n",
+ blocked ? "blocked" : "unblocked",
+ absent ? "absent" : "present");
+ pr_warn("skipped wireless hotplug as probably inappropriate for this model\n");
+ goto out_put_dev;
+ }
+
+ if (!blocked) {
+ dev = pci_get_slot(bus, 0);
+ if (dev) {
+ /* Device already present */
+ pci_dev_put(dev);
+ goto out_put_dev;
+ }
+ dev = pci_scan_single_device(bus, 0);
+ if (dev) {
+ pci_bus_assign_resources(bus);
+ pci_bus_add_device(dev);
+ }
+ } else {
+ dev = pci_get_slot(bus, 0);
+ if (dev) {
+ pci_stop_and_remove_bus_device(dev);
+ pci_dev_put(dev);
+ }
+ }
+out_put_dev:
+ pci_dev_put(port);
+
+out_unlock:
+ pci_unlock_rescan_remove();
+ mutex_unlock(&eeepc->hotplug_lock);
+}
+
+static void eeepc_rfkill_hotplug_update(struct eeepc_laptop *eeepc, char *node)
+{
+ acpi_status status = AE_OK;
+ acpi_handle handle;
+
+ status = acpi_get_handle(NULL, node, &handle);
+
+ if (ACPI_SUCCESS(status))
+ eeepc_rfkill_hotplug(eeepc, handle);
+}
+
+static void eeepc_rfkill_notify(acpi_handle handle, u32 event, void *data)
+{
+ struct eeepc_laptop *eeepc = data;
+
+ if (event != ACPI_NOTIFY_BUS_CHECK)
+ return;
+
+ eeepc_rfkill_hotplug(eeepc, handle);
+}
+
+static int eeepc_register_rfkill_notifier(struct eeepc_laptop *eeepc,
+ char *node)
+{
+ acpi_status status;
+ acpi_handle handle;
+
+ status = acpi_get_handle(NULL, node, &handle);
+
+ if (ACPI_FAILURE(status))
+ return -ENODEV;
+
+ status = acpi_install_notify_handler(handle,
+ ACPI_SYSTEM_NOTIFY,
+ eeepc_rfkill_notify,
+ eeepc);
+ if (ACPI_FAILURE(status))
+ pr_warn("Failed to register notify on %s\n", node);
+
+ /*
+ * Refresh pci hotplug in case the rfkill state was
+ * changed during setup.
+ */
+ eeepc_rfkill_hotplug(eeepc, handle);
+ return 0;
+}
+
+static void eeepc_unregister_rfkill_notifier(struct eeepc_laptop *eeepc,
+ char *node)
+{
+ acpi_status status = AE_OK;
+ acpi_handle handle;
+
+ status = acpi_get_handle(NULL, node, &handle);
+
+ if (ACPI_FAILURE(status))
+ return;
+
+ status = acpi_remove_notify_handler(handle,
+ ACPI_SYSTEM_NOTIFY,
+ eeepc_rfkill_notify);
+ if (ACPI_FAILURE(status))
+ pr_err("Error removing rfkill notify handler %s\n",
+ node);
+ /*
+ * Refresh pci hotplug in case the rfkill
+ * state was changed after
+ * eeepc_unregister_rfkill_notifier()
+ */
+ eeepc_rfkill_hotplug(eeepc, handle);
+}
+
+static int eeepc_get_adapter_status(struct hotplug_slot *hotplug_slot,
+ u8 *value)
+{
+ struct eeepc_laptop *eeepc = hotplug_slot->private;
+ int val = get_acpi(eeepc, CM_ASL_WLAN);
+
+ if (val == 1 || val == 0)
+ *value = val;
+ else
+ return -EINVAL;
+
+ return 0;
+}
+
+static struct hotplug_slot_ops eeepc_hotplug_slot_ops = {
+ .owner = THIS_MODULE,
+ .get_adapter_status = eeepc_get_adapter_status,
+ .get_power_status = eeepc_get_adapter_status,
+};
+
+static int eeepc_setup_pci_hotplug(struct eeepc_laptop *eeepc)
+{
+ int ret = -ENOMEM;
+ struct pci_bus *bus = pci_find_bus(0, 1);
+
+ if (!bus) {
+ pr_err("Unable to find wifi PCI bus\n");
+ return -ENODEV;
+ }
+
+ eeepc->hotplug_slot = kzalloc(sizeof(struct hotplug_slot), GFP_KERNEL);
+ if (!eeepc->hotplug_slot)
+ goto error_slot;
+
+ eeepc->hotplug_slot->info = kzalloc(sizeof(struct hotplug_slot_info),
+ GFP_KERNEL);
+ if (!eeepc->hotplug_slot->info)
+ goto error_info;
+
+ eeepc->hotplug_slot->private = eeepc;
+ eeepc->hotplug_slot->ops = &eeepc_hotplug_slot_ops;
+ eeepc_get_adapter_status(eeepc->hotplug_slot,
+ &eeepc->hotplug_slot->info->adapter_status);
+
+ ret = pci_hp_register(eeepc->hotplug_slot, bus, 0, "eeepc-wifi");
+ if (ret) {
+ pr_err("Unable to register hotplug slot - %d\n", ret);
+ goto error_register;
+ }
+
+ return 0;
+
+error_register:
+ kfree(eeepc->hotplug_slot->info);
+error_info:
+ kfree(eeepc->hotplug_slot);
+ eeepc->hotplug_slot = NULL;
+error_slot:
+ return ret;
+}
+
+/*
+ * Rfkill devices
+ */
+static int eeepc_rfkill_set(void *data, bool blocked)
+{
+ acpi_handle handle = data;
+
+ return write_acpi_int(handle, NULL, !blocked);
+}
+
+static const struct rfkill_ops eeepc_rfkill_ops = {
+ .set_block = eeepc_rfkill_set,
+};
+
+static int eeepc_new_rfkill(struct eeepc_laptop *eeepc,
+ struct rfkill **rfkill,
+ const char *name,
+ enum rfkill_type type, int cm)
+{
+ acpi_handle handle;
+ int result;
+
+ result = acpi_setter_handle(eeepc, cm, &handle);
+ if (result < 0)
+ return result;
+
+ *rfkill = rfkill_alloc(name, &eeepc->platform_device->dev, type,
+ &eeepc_rfkill_ops, handle);
+
+ if (!*rfkill)
+ return -EINVAL;
+
+ rfkill_init_sw_state(*rfkill, get_acpi(eeepc, cm) != 1);
+ result = rfkill_register(*rfkill);
+ if (result) {
+ rfkill_destroy(*rfkill);
+ *rfkill = NULL;
+ return result;
+ }
+ return 0;
+}
+
+static char EEEPC_RFKILL_NODE_1[] = "\\_SB.PCI0.P0P5";
+static char EEEPC_RFKILL_NODE_2[] = "\\_SB.PCI0.P0P6";
+static char EEEPC_RFKILL_NODE_3[] = "\\_SB.PCI0.P0P7";
+
+static void eeepc_rfkill_exit(struct eeepc_laptop *eeepc)
+{
+ eeepc_unregister_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_1);
+ eeepc_unregister_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_2);
+ eeepc_unregister_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_3);
+ if (eeepc->wlan_rfkill) {
+ rfkill_unregister(eeepc->wlan_rfkill);
+ rfkill_destroy(eeepc->wlan_rfkill);
+ eeepc->wlan_rfkill = NULL;
+ }
+
+ if (eeepc->hotplug_slot) {
+ pci_hp_deregister(eeepc->hotplug_slot);
+ kfree(eeepc->hotplug_slot->info);
+ kfree(eeepc->hotplug_slot);
+ }
+
+ if (eeepc->bluetooth_rfkill) {
+ rfkill_unregister(eeepc->bluetooth_rfkill);
+ rfkill_destroy(eeepc->bluetooth_rfkill);
+ eeepc->bluetooth_rfkill = NULL;
+ }
+ if (eeepc->wwan3g_rfkill) {
+ rfkill_unregister(eeepc->wwan3g_rfkill);
+ rfkill_destroy(eeepc->wwan3g_rfkill);
+ eeepc->wwan3g_rfkill = NULL;
+ }
+ if (eeepc->wimax_rfkill) {
+ rfkill_unregister(eeepc->wimax_rfkill);
+ rfkill_destroy(eeepc->wimax_rfkill);
+ eeepc->wimax_rfkill = NULL;
+ }
+}
+
+static int eeepc_rfkill_init(struct eeepc_laptop *eeepc)
+{
+ int result = 0;
+
+ mutex_init(&eeepc->hotplug_lock);
+
+ result = eeepc_new_rfkill(eeepc, &eeepc->wlan_rfkill,
+ "eeepc-wlan", RFKILL_TYPE_WLAN,
+ CM_ASL_WLAN);
+
+ if (result && result != -ENODEV)
+ goto exit;
+
+ result = eeepc_new_rfkill(eeepc, &eeepc->bluetooth_rfkill,
+ "eeepc-bluetooth", RFKILL_TYPE_BLUETOOTH,
+ CM_ASL_BLUETOOTH);
+
+ if (result && result != -ENODEV)
+ goto exit;
+
+ result = eeepc_new_rfkill(eeepc, &eeepc->wwan3g_rfkill,
+ "eeepc-wwan3g", RFKILL_TYPE_WWAN,
+ CM_ASL_3G);
+
+ if (result && result != -ENODEV)
+ goto exit;
+
+ result = eeepc_new_rfkill(eeepc, &eeepc->wimax_rfkill,
+ "eeepc-wimax", RFKILL_TYPE_WIMAX,
+ CM_ASL_WIMAX);
+
+ if (result && result != -ENODEV)
+ goto exit;
+
+ if (eeepc->hotplug_disabled)
+ return 0;
+
+ result = eeepc_setup_pci_hotplug(eeepc);
+ /*
+ * If we get -EBUSY then something else is handling the PCI hotplug -
+ * don't fail in this case
+ */
+ if (result == -EBUSY)
+ result = 0;
+
+ eeepc_register_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_1);
+ eeepc_register_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_2);
+ eeepc_register_rfkill_notifier(eeepc, EEEPC_RFKILL_NODE_3);
+
+exit:
+ if (result && result != -ENODEV)
+ eeepc_rfkill_exit(eeepc);
+ return result;
+}
+
+/*
+ * Platform driver - hibernate/resume callbacks
+ */
+static int eeepc_hotk_thaw(struct device *device)
+{
+ struct eeepc_laptop *eeepc = dev_get_drvdata(device);
+
+ if (eeepc->wlan_rfkill) {
+ int wlan;
+
+ /*
+ * Work around bios bug - acpi _PTS turns off the wireless led
+ * during suspend. Normally it restores it on resume, but
+ * we should kick it ourselves in case hibernation is aborted.
+ */
+ wlan = get_acpi(eeepc, CM_ASL_WLAN);
+ if (wlan >= 0)
+ set_acpi(eeepc, CM_ASL_WLAN, wlan);
+ }
+
+ return 0;
+}
+
+static int eeepc_hotk_restore(struct device *device)
+{
+ struct eeepc_laptop *eeepc = dev_get_drvdata(device);
+
+ /* Refresh both wlan rfkill state and pci hotplug */
+ if (eeepc->wlan_rfkill) {
+ eeepc_rfkill_hotplug_update(eeepc, EEEPC_RFKILL_NODE_1);
+ eeepc_rfkill_hotplug_update(eeepc, EEEPC_RFKILL_NODE_2);
+ eeepc_rfkill_hotplug_update(eeepc, EEEPC_RFKILL_NODE_3);
+ }
+
+ if (eeepc->bluetooth_rfkill)
+ rfkill_set_sw_state(eeepc->bluetooth_rfkill,
+ get_acpi(eeepc, CM_ASL_BLUETOOTH) != 1);
+ if (eeepc->wwan3g_rfkill)
+ rfkill_set_sw_state(eeepc->wwan3g_rfkill,
+ get_acpi(eeepc, CM_ASL_3G) != 1);
+ if (eeepc->wimax_rfkill)
+ rfkill_set_sw_state(eeepc->wimax_rfkill,
+ get_acpi(eeepc, CM_ASL_WIMAX) != 1);
+
+ return 0;
+}
+
+static const struct dev_pm_ops eeepc_pm_ops = {
+ .thaw = eeepc_hotk_thaw,
+ .restore = eeepc_hotk_restore,
+};
+
+static struct platform_driver platform_driver = {
+ .driver = {
+ .name = EEEPC_LAPTOP_FILE,
+ .pm = &eeepc_pm_ops,
+ }
+};
+
+/*
+ * Hwmon device
+ */
+
+#define EEEPC_EC_SC00 0x61
+#define EEEPC_EC_FAN_PWM (EEEPC_EC_SC00 + 2) /* Fan PWM duty cycle (%) */
+#define EEEPC_EC_FAN_HRPM (EEEPC_EC_SC00 + 5) /* High byte, fan speed (RPM) */
+#define EEEPC_EC_FAN_LRPM (EEEPC_EC_SC00 + 6) /* Low byte, fan speed (RPM) */
+
+#define EEEPC_EC_SFB0 0xD0
+#define EEEPC_EC_FAN_CTRL (EEEPC_EC_SFB0 + 3) /* Byte containing SF25 */
+
+static inline int eeepc_pwm_to_lmsensors(int value)
+{
+ return value * 255 / 100;
+}
+
+static inline int eeepc_lmsensors_to_pwm(int value)
+{
+ value = clamp_val(value, 0, 255);
+ return value * 100 / 255;
+}
+
+static int eeepc_get_fan_pwm(void)
+{
+ u8 value = 0;
+
+ ec_read(EEEPC_EC_FAN_PWM, &value);
+ return eeepc_pwm_to_lmsensors(value);
+}
+
+static void eeepc_set_fan_pwm(int value)
+{
+ value = eeepc_lmsensors_to_pwm(value);
+ ec_write(EEEPC_EC_FAN_PWM, value);
+}
+
+static int eeepc_get_fan_rpm(void)
+{
+ u8 high = 0;
+ u8 low = 0;
+
+ ec_read(EEEPC_EC_FAN_HRPM, &high);
+ ec_read(EEEPC_EC_FAN_LRPM, &low);
+ return high << 8 | low;
+}
+
+#define EEEPC_EC_FAN_CTRL_BIT 0x02
+#define EEEPC_FAN_CTRL_MANUAL 1
+#define EEEPC_FAN_CTRL_AUTO 2
+
+static int eeepc_get_fan_ctrl(void)
+{
+ u8 value = 0;
+
+ ec_read(EEEPC_EC_FAN_CTRL, &value);
+ if (value & EEEPC_EC_FAN_CTRL_BIT)
+ return EEEPC_FAN_CTRL_MANUAL;
+ else
+ return EEEPC_FAN_CTRL_AUTO;
+}
+
+static void eeepc_set_fan_ctrl(int manual)
+{
+ u8 value = 0;
+
+ ec_read(EEEPC_EC_FAN_CTRL, &value);
+ if (manual == EEEPC_FAN_CTRL_MANUAL)
+ value |= EEEPC_EC_FAN_CTRL_BIT;
+ else
+ value &= ~EEEPC_EC_FAN_CTRL_BIT;
+ ec_write(EEEPC_EC_FAN_CTRL, value);
+}
+
+static ssize_t store_sys_hwmon(void (*set)(int), const char *buf, size_t count)
+{
+ int rv, value;
+
+ rv = parse_arg(buf, &value);
+ if (rv < 0)
+ return rv;
+ set(value);
+ return count;
+}
+
+static ssize_t show_sys_hwmon(int (*get)(void), char *buf)
+{
+ return sprintf(buf, "%d\n", get());
+}
+
+#define EEEPC_SENSOR_SHOW_FUNC(_name, _get) \
+ static ssize_t _name##_show(struct device *dev, \
+ struct device_attribute *attr, \
+ char *buf) \
+ { \
+ return show_sys_hwmon(_get, buf); \
+ }
+
+#define EEEPC_SENSOR_STORE_FUNC(_name, _set) \
+ static ssize_t _name##_store(struct device *dev, \
+ struct device_attribute *attr, \
+ const char *buf, size_t count) \
+ { \
+ return store_sys_hwmon(_set, buf, count); \
+ }
+
+#define EEEPC_CREATE_SENSOR_ATTR_RW(_name, _get, _set) \
+ EEEPC_SENSOR_SHOW_FUNC(_name, _get) \
+ EEEPC_SENSOR_STORE_FUNC(_name, _set) \
+ static DEVICE_ATTR_RW(_name)
+
+#define EEEPC_CREATE_SENSOR_ATTR_RO(_name, _get) \
+ EEEPC_SENSOR_SHOW_FUNC(_name, _get) \
+ static DEVICE_ATTR_RO(_name)
+
+EEEPC_CREATE_SENSOR_ATTR_RO(fan1_input, eeepc_get_fan_rpm);
+EEEPC_CREATE_SENSOR_ATTR_RW(pwm1, eeepc_get_fan_pwm,
+ eeepc_set_fan_pwm);
+EEEPC_CREATE_SENSOR_ATTR_RW(pwm1_enable, eeepc_get_fan_ctrl,
+ eeepc_set_fan_ctrl);
+
+static struct attribute *hwmon_attrs[] = {
+ &dev_attr_pwm1.attr,
+ &dev_attr_fan1_input.attr,
+ &dev_attr_pwm1_enable.attr,
+ NULL
+};
+ATTRIBUTE_GROUPS(hwmon);
+
+static int eeepc_hwmon_init(struct eeepc_laptop *eeepc)
+{
+ struct device *dev = &eeepc->platform_device->dev;
+ struct device *hwmon;
+
+ hwmon = devm_hwmon_device_register_with_groups(dev, "eeepc", NULL,
+ hwmon_groups);
+ if (IS_ERR(hwmon)) {
+ pr_err("Could not register eeepc hwmon device\n");
+ return PTR_ERR(hwmon);
+ }
+ return 0;
+}
+
+/*
+ * Backlight device
+ */
+static int read_brightness(struct backlight_device *bd)
+{
+ struct eeepc_laptop *eeepc = bl_get_data(bd);
+
+ return get_acpi(eeepc, CM_ASL_PANELBRIGHT);
+}
+
+static int set_brightness(struct backlight_device *bd, int value)
+{
+ struct eeepc_laptop *eeepc = bl_get_data(bd);
+
+ return set_acpi(eeepc, CM_ASL_PANELBRIGHT, value);
+}
+
+static int update_bl_status(struct backlight_device *bd)
+{
+ return set_brightness(bd, bd->props.brightness);
+}
+
+static const struct backlight_ops eeepcbl_ops = {
+ .get_brightness = read_brightness,
+ .update_status = update_bl_status,
+};
+
+static int eeepc_backlight_notify(struct eeepc_laptop *eeepc)
+{
+ struct backlight_device *bd = eeepc->backlight_device;
+ int old = bd->props.brightness;
+
+ backlight_force_update(bd, BACKLIGHT_UPDATE_HOTKEY);
+
+ return old;
+}
+
+static int eeepc_backlight_init(struct eeepc_laptop *eeepc)
+{
+ struct backlight_properties props;
+ struct backlight_device *bd;
+
+ memset(&props, 0, sizeof(struct backlight_properties));
+ props.type = BACKLIGHT_PLATFORM;
+ props.max_brightness = 15;
+ bd = backlight_device_register(EEEPC_LAPTOP_FILE,
+ &eeepc->platform_device->dev, eeepc,
+ &eeepcbl_ops, &props);
+ if (IS_ERR(bd)) {
+ pr_err("Could not register eeepc backlight device\n");
+ eeepc->backlight_device = NULL;
+ return PTR_ERR(bd);
+ }
+ eeepc->backlight_device = bd;
+ bd->props.brightness = read_brightness(bd);
+ bd->props.power = FB_BLANK_UNBLANK;
+ backlight_update_status(bd);
+ return 0;
+}
+
+static void eeepc_backlight_exit(struct eeepc_laptop *eeepc)
+{
+ backlight_device_unregister(eeepc->backlight_device);
+ eeepc->backlight_device = NULL;
+}
+
+
+/*
+ * Input device (i.e. hotkeys)
+ */
+static int eeepc_input_init(struct eeepc_laptop *eeepc)
+{
+ struct input_dev *input;
+ int error;
+
+ input = input_allocate_device();
+ if (!input)
+ return -ENOMEM;
+
+ input->name = "Asus EeePC extra buttons";
+ input->phys = EEEPC_LAPTOP_FILE "/input0";
+ input->id.bustype = BUS_HOST;
+ input->dev.parent = &eeepc->platform_device->dev;
+
+ error = sparse_keymap_setup(input, eeepc_keymap, NULL);
+ if (error) {
+ pr_err("Unable to setup input device keymap\n");
+ goto err_free_dev;
+ }
+
+ error = input_register_device(input);
+ if (error) {
+ pr_err("Unable to register input device\n");
+ goto err_free_dev;
+ }
+
+ eeepc->inputdev = input;
+ return 0;
+
+err_free_dev:
+ input_free_device(input);
+ return error;
+}
+
+static void eeepc_input_exit(struct eeepc_laptop *eeepc)
+{
+ if (eeepc->inputdev)
+ input_unregister_device(eeepc->inputdev);
+ eeepc->inputdev = NULL;
+}
+
+/*
+ * ACPI driver
+ */
+static void eeepc_input_notify(struct eeepc_laptop *eeepc, int event)
+{
+ if (!eeepc->inputdev)
+ return;
+ if (!sparse_keymap_report_event(eeepc->inputdev, event, 1, true))
+ pr_info("Unknown key %x pressed\n", event);
+}
+
+static void eeepc_acpi_notify(struct acpi_device *device, u32 event)
+{
+ struct eeepc_laptop *eeepc = acpi_driver_data(device);
+ int old_brightness, new_brightness;
+ u16 count;
+
+ if (event > ACPI_MAX_SYS_NOTIFY)
+ return;
+ count = eeepc->event_count[event % 128]++;
+ acpi_bus_generate_netlink_event(device->pnp.device_class,
+ dev_name(&device->dev), event,
+ count);
+
+ /* Brightness events are special */
+ if (event < NOTIFY_BRN_MIN || event > NOTIFY_BRN_MAX) {
+ eeepc_input_notify(eeepc, event);
+ return;
+ }
+
+ /* Ignore them completely if the acpi video driver is used */
+ if (!eeepc->backlight_device)
+ return;
+
+ /* Update the backlight device. */
+ old_brightness = eeepc_backlight_notify(eeepc);
+
+ /* Convert event to keypress (obsolescent hack) */
+ new_brightness = event - NOTIFY_BRN_MIN;
+
+ if (new_brightness < old_brightness) {
+ event = NOTIFY_BRN_MIN; /* brightness down */
+ } else if (new_brightness > old_brightness) {
+ event = NOTIFY_BRN_MAX; /* brightness up */
+ } else {
+ /*
+ * no change in brightness - already at min/max,
+ * event will be desired value (or else ignored)
+ */
+ }
+ eeepc_input_notify(eeepc, event);
+}
+
+static void eeepc_dmi_check(struct eeepc_laptop *eeepc)
+{
+ const char *model;
+
+ model = dmi_get_system_info(DMI_PRODUCT_NAME);
+ if (!model)
+ return;
+
+ /*
+ * Blacklist for setting cpufv (cpu speed).
+ *
+ * EeePC 4G ("701") implements CFVS, but it is not supported
+ * by the pre-installed OS, and the original option to change it
+ * in the BIOS setup screen was removed in later versions.
+ *
+ * Judging by the lack of "Super Hybrid Engine" on Asus product pages,
+ * this applies to all "701" models (4G/4G Surf/2G Surf).
+ *
+ * So Asus made a deliberate decision not to support it on this model.
+ * We have several reports that using it can cause the system to hang
+ *
+ * The hang has also been reported on a "702" (Model name "8G"?).
+ *
+ * We avoid dmi_check_system() / dmi_match(), because they use
+ * substring matching. We don't want to affect the "701SD"
+ * and "701SDX" models, because they do support S.H.E.
+ */
+ if (strcmp(model, "701") == 0 || strcmp(model, "702") == 0) {
+ eeepc->cpufv_disabled = true;
+ pr_info("model %s does not officially support setting cpu speed\n",
+ model);
+ pr_info("cpufv disabled to avoid instability\n");
+ }
+
+ /*
+ * Blacklist for wlan hotplug
+ *
+ * Eeepc 1005HA doesn't work like others models and don't need the
+ * hotplug code. In fact, current hotplug code seems to unplug another
+ * device...
+ */
+ if (strcmp(model, "1005HA") == 0 || strcmp(model, "1201N") == 0 ||
+ strcmp(model, "1005PE") == 0) {
+ eeepc->hotplug_disabled = true;
+ pr_info("wlan hotplug disabled\n");
+ }
+}
+
+static void cmsg_quirk(struct eeepc_laptop *eeepc, int cm, const char *name)
+{
+ int dummy;
+
+ /* Some BIOSes do not report cm although it is available.
+ Check if cm_getv[cm] works and, if yes, assume cm should be set. */
+ if (!(eeepc->cm_supported & (1 << cm))
+ && !read_acpi_int(eeepc->handle, cm_getv[cm], &dummy)) {
+ pr_info("%s (%x) not reported by BIOS, enabling anyway\n",
+ name, 1 << cm);
+ eeepc->cm_supported |= 1 << cm;
+ }
+}
+
+static void cmsg_quirks(struct eeepc_laptop *eeepc)
+{
+ cmsg_quirk(eeepc, CM_ASL_LID, "LID");
+ cmsg_quirk(eeepc, CM_ASL_TYPE, "TYPE");
+ cmsg_quirk(eeepc, CM_ASL_PANELPOWER, "PANELPOWER");
+ cmsg_quirk(eeepc, CM_ASL_TPD, "TPD");
+}
+
+static int eeepc_acpi_init(struct eeepc_laptop *eeepc)
+{
+ unsigned int init_flags;
+ int result;
+
+ result = acpi_bus_get_status(eeepc->device);
+ if (result)
+ return result;
+ if (!eeepc->device->status.present) {
+ pr_err("Hotkey device not present, aborting\n");
+ return -ENODEV;
+ }
+
+ init_flags = DISABLE_ASL_WLAN | DISABLE_ASL_DISPLAYSWITCH;
+ pr_notice("Hotkey init flags 0x%x\n", init_flags);
+
+ if (write_acpi_int(eeepc->handle, "INIT", init_flags)) {
+ pr_err("Hotkey initialization failed\n");
+ return -ENODEV;
+ }
+
+ /* get control methods supported */
+ if (read_acpi_int(eeepc->handle, "CMSG", &eeepc->cm_supported)) {
+ pr_err("Get control methods supported failed\n");
+ return -ENODEV;
+ }
+ cmsg_quirks(eeepc);
+ pr_info("Get control methods supported: 0x%x\n", eeepc->cm_supported);
+
+ return 0;
+}
+
+static void eeepc_enable_camera(struct eeepc_laptop *eeepc)
+{
+ /*
+ * If the following call to set_acpi() fails, it's because there's no
+ * camera so we can ignore the error.
+ */
+ if (get_acpi(eeepc, CM_ASL_CAMERA) == 0)
+ set_acpi(eeepc, CM_ASL_CAMERA, 1);
+}
+
+static bool eeepc_device_present;
+
+static int eeepc_acpi_add(struct acpi_device *device)
+{
+ struct eeepc_laptop *eeepc;
+ int result;
+
+ pr_notice(EEEPC_LAPTOP_NAME "\n");
+ eeepc = kzalloc(sizeof(struct eeepc_laptop), GFP_KERNEL);
+ if (!eeepc)
+ return -ENOMEM;
+ eeepc->handle = device->handle;
+ strcpy(acpi_device_name(device), EEEPC_ACPI_DEVICE_NAME);
+ strcpy(acpi_device_class(device), EEEPC_ACPI_CLASS);
+ device->driver_data = eeepc;
+ eeepc->device = device;
+
+ eeepc->hotplug_disabled = hotplug_disabled;
+
+ eeepc_dmi_check(eeepc);
+
+ result = eeepc_acpi_init(eeepc);
+ if (result)
+ goto fail_platform;
+ eeepc_enable_camera(eeepc);
+
+ /*
+ * Register the platform device first. It is used as a parent for the
+ * sub-devices below.
+ *
+ * Note that if there are multiple instances of this ACPI device it
+ * will bail out, because the platform device is registered with a
+ * fixed name. Of course it doesn't make sense to have more than one,
+ * and machine-specific scripts find the fixed name convenient. But
+ * It's also good for us to exclude multiple instances because both
+ * our hwmon and our wlan rfkill subdevice use global ACPI objects
+ * (the EC and the wlan PCI slot respectively).
+ */
+ result = eeepc_platform_init(eeepc);
+ if (result)
+ goto fail_platform;
+
+ if (acpi_video_get_backlight_type() == acpi_backlight_vendor) {
+ result = eeepc_backlight_init(eeepc);
+ if (result)
+ goto fail_backlight;
+ }
+
+ result = eeepc_input_init(eeepc);
+ if (result)
+ goto fail_input;
+
+ result = eeepc_hwmon_init(eeepc);
+ if (result)
+ goto fail_hwmon;
+
+ result = eeepc_led_init(eeepc);
+ if (result)
+ goto fail_led;
+
+ result = eeepc_rfkill_init(eeepc);
+ if (result)
+ goto fail_rfkill;
+
+ eeepc_device_present = true;
+ return 0;
+
+fail_rfkill:
+ eeepc_led_exit(eeepc);
+fail_led:
+fail_hwmon:
+ eeepc_input_exit(eeepc);
+fail_input:
+ eeepc_backlight_exit(eeepc);
+fail_backlight:
+ eeepc_platform_exit(eeepc);
+fail_platform:
+ kfree(eeepc);
+
+ return result;
+}
+
+static int eeepc_acpi_remove(struct acpi_device *device)
+{
+ struct eeepc_laptop *eeepc = acpi_driver_data(device);
+
+ eeepc_backlight_exit(eeepc);
+ eeepc_rfkill_exit(eeepc);
+ eeepc_input_exit(eeepc);
+ eeepc_led_exit(eeepc);
+ eeepc_platform_exit(eeepc);
+
+ kfree(eeepc);
+ return 0;
+}
+
+
+static const struct acpi_device_id eeepc_device_ids[] = {
+ {EEEPC_ACPI_HID, 0},
+ {"", 0},
+};
+MODULE_DEVICE_TABLE(acpi, eeepc_device_ids);
+
+static struct acpi_driver eeepc_acpi_driver = {
+ .name = EEEPC_LAPTOP_NAME,
+ .class = EEEPC_ACPI_CLASS,
+ .owner = THIS_MODULE,
+ .ids = eeepc_device_ids,
+ .flags = ACPI_DRIVER_ALL_NOTIFY_EVENTS,
+ .ops = {
+ .add = eeepc_acpi_add,
+ .remove = eeepc_acpi_remove,
+ .notify = eeepc_acpi_notify,
+ },
+};
+
+
+static int __init eeepc_laptop_init(void)
+{
+ int result;
+
+ result = platform_driver_register(&platform_driver);
+ if (result < 0)
+ return result;
+
+ result = acpi_bus_register_driver(&eeepc_acpi_driver);
+ if (result < 0)
+ goto fail_acpi_driver;
+
+ if (!eeepc_device_present) {
+ result = -ENODEV;
+ goto fail_no_device;
+ }
+
+ return 0;
+
+fail_no_device:
+ acpi_bus_unregister_driver(&eeepc_acpi_driver);
+fail_acpi_driver:
+ platform_driver_unregister(&platform_driver);
+ return result;
+}
+
+static void __exit eeepc_laptop_exit(void)
+{
+ acpi_bus_unregister_driver(&eeepc_acpi_driver);
+ platform_driver_unregister(&platform_driver);
+}
+
+module_init(eeepc_laptop_init);
+module_exit(eeepc_laptop_exit);