v4.19.13 snapshot.
diff --git a/drivers/media/rc/rc-main.c b/drivers/media/rc/rc-main.c
new file mode 100644
index 0000000..ca68e1d
--- /dev/null
+++ b/drivers/media/rc/rc-main.c
@@ -0,0 +1,2014 @@
+// SPDX-License-Identifier: GPL-2.0
+// rc-main.c - Remote Controller core module
+//
+// Copyright (C) 2009-2010 by Mauro Carvalho Chehab
+
+#define pr_fmt(fmt) KBUILD_MODNAME ": " fmt
+
+#include <media/rc-core.h>
+#include <linux/bsearch.h>
+#include <linux/spinlock.h>
+#include <linux/delay.h>
+#include <linux/input.h>
+#include <linux/leds.h>
+#include <linux/slab.h>
+#include <linux/idr.h>
+#include <linux/device.h>
+#include <linux/module.h>
+#include "rc-core-priv.h"
+
+/* Sizes are in bytes, 256 bytes allows for 32 entries on x64 */
+#define IR_TAB_MIN_SIZE 256
+#define IR_TAB_MAX_SIZE 8192
+
+static const struct {
+ const char *name;
+ unsigned int repeat_period;
+ unsigned int scancode_bits;
+} protocols[] = {
+ [RC_PROTO_UNKNOWN] = { .name = "unknown", .repeat_period = 125 },
+ [RC_PROTO_OTHER] = { .name = "other", .repeat_period = 125 },
+ [RC_PROTO_RC5] = { .name = "rc-5",
+ .scancode_bits = 0x1f7f, .repeat_period = 114 },
+ [RC_PROTO_RC5X_20] = { .name = "rc-5x-20",
+ .scancode_bits = 0x1f7f3f, .repeat_period = 114 },
+ [RC_PROTO_RC5_SZ] = { .name = "rc-5-sz",
+ .scancode_bits = 0x2fff, .repeat_period = 114 },
+ [RC_PROTO_JVC] = { .name = "jvc",
+ .scancode_bits = 0xffff, .repeat_period = 125 },
+ [RC_PROTO_SONY12] = { .name = "sony-12",
+ .scancode_bits = 0x1f007f, .repeat_period = 100 },
+ [RC_PROTO_SONY15] = { .name = "sony-15",
+ .scancode_bits = 0xff007f, .repeat_period = 100 },
+ [RC_PROTO_SONY20] = { .name = "sony-20",
+ .scancode_bits = 0x1fff7f, .repeat_period = 100 },
+ [RC_PROTO_NEC] = { .name = "nec",
+ .scancode_bits = 0xffff, .repeat_period = 110 },
+ [RC_PROTO_NECX] = { .name = "nec-x",
+ .scancode_bits = 0xffffff, .repeat_period = 110 },
+ [RC_PROTO_NEC32] = { .name = "nec-32",
+ .scancode_bits = 0xffffffff, .repeat_period = 110 },
+ [RC_PROTO_SANYO] = { .name = "sanyo",
+ .scancode_bits = 0x1fffff, .repeat_period = 125 },
+ [RC_PROTO_MCIR2_KBD] = { .name = "mcir2-kbd",
+ .scancode_bits = 0xffffff, .repeat_period = 100 },
+ [RC_PROTO_MCIR2_MSE] = { .name = "mcir2-mse",
+ .scancode_bits = 0x1fffff, .repeat_period = 100 },
+ [RC_PROTO_RC6_0] = { .name = "rc-6-0",
+ .scancode_bits = 0xffff, .repeat_period = 114 },
+ [RC_PROTO_RC6_6A_20] = { .name = "rc-6-6a-20",
+ .scancode_bits = 0xfffff, .repeat_period = 114 },
+ [RC_PROTO_RC6_6A_24] = { .name = "rc-6-6a-24",
+ .scancode_bits = 0xffffff, .repeat_period = 114 },
+ [RC_PROTO_RC6_6A_32] = { .name = "rc-6-6a-32",
+ .scancode_bits = 0xffffffff, .repeat_period = 114 },
+ [RC_PROTO_RC6_MCE] = { .name = "rc-6-mce",
+ .scancode_bits = 0xffff7fff, .repeat_period = 114 },
+ [RC_PROTO_SHARP] = { .name = "sharp",
+ .scancode_bits = 0x1fff, .repeat_period = 125 },
+ [RC_PROTO_XMP] = { .name = "xmp", .repeat_period = 125 },
+ [RC_PROTO_CEC] = { .name = "cec", .repeat_period = 0 },
+ [RC_PROTO_IMON] = { .name = "imon",
+ .scancode_bits = 0x7fffffff, .repeat_period = 114 },
+};
+
+/* Used to keep track of known keymaps */
+static LIST_HEAD(rc_map_list);
+static DEFINE_SPINLOCK(rc_map_lock);
+static struct led_trigger *led_feedback;
+
+/* Used to keep track of rc devices */
+static DEFINE_IDA(rc_ida);
+
+static struct rc_map_list *seek_rc_map(const char *name)
+{
+ struct rc_map_list *map = NULL;
+
+ spin_lock(&rc_map_lock);
+ list_for_each_entry(map, &rc_map_list, list) {
+ if (!strcmp(name, map->map.name)) {
+ spin_unlock(&rc_map_lock);
+ return map;
+ }
+ }
+ spin_unlock(&rc_map_lock);
+
+ return NULL;
+}
+
+struct rc_map *rc_map_get(const char *name)
+{
+
+ struct rc_map_list *map;
+
+ map = seek_rc_map(name);
+#ifdef CONFIG_MODULES
+ if (!map) {
+ int rc = request_module("%s", name);
+ if (rc < 0) {
+ pr_err("Couldn't load IR keymap %s\n", name);
+ return NULL;
+ }
+ msleep(20); /* Give some time for IR to register */
+
+ map = seek_rc_map(name);
+ }
+#endif
+ if (!map) {
+ pr_err("IR keymap %s not found\n", name);
+ return NULL;
+ }
+
+ printk(KERN_INFO "Registered IR keymap %s\n", map->map.name);
+
+ return &map->map;
+}
+EXPORT_SYMBOL_GPL(rc_map_get);
+
+int rc_map_register(struct rc_map_list *map)
+{
+ spin_lock(&rc_map_lock);
+ list_add_tail(&map->list, &rc_map_list);
+ spin_unlock(&rc_map_lock);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(rc_map_register);
+
+void rc_map_unregister(struct rc_map_list *map)
+{
+ spin_lock(&rc_map_lock);
+ list_del(&map->list);
+ spin_unlock(&rc_map_lock);
+}
+EXPORT_SYMBOL_GPL(rc_map_unregister);
+
+
+static struct rc_map_table empty[] = {
+ { 0x2a, KEY_COFFEE },
+};
+
+static struct rc_map_list empty_map = {
+ .map = {
+ .scan = empty,
+ .size = ARRAY_SIZE(empty),
+ .rc_proto = RC_PROTO_UNKNOWN, /* Legacy IR type */
+ .name = RC_MAP_EMPTY,
+ }
+};
+
+/**
+ * ir_create_table() - initializes a scancode table
+ * @dev: the rc_dev device
+ * @rc_map: the rc_map to initialize
+ * @name: name to assign to the table
+ * @rc_proto: ir type to assign to the new table
+ * @size: initial size of the table
+ *
+ * This routine will initialize the rc_map and will allocate
+ * memory to hold at least the specified number of elements.
+ *
+ * return: zero on success or a negative error code
+ */
+static int ir_create_table(struct rc_dev *dev, struct rc_map *rc_map,
+ const char *name, u64 rc_proto, size_t size)
+{
+ rc_map->name = kstrdup(name, GFP_KERNEL);
+ if (!rc_map->name)
+ return -ENOMEM;
+ rc_map->rc_proto = rc_proto;
+ rc_map->alloc = roundup_pow_of_two(size * sizeof(struct rc_map_table));
+ rc_map->size = rc_map->alloc / sizeof(struct rc_map_table);
+ rc_map->scan = kmalloc(rc_map->alloc, GFP_KERNEL);
+ if (!rc_map->scan) {
+ kfree(rc_map->name);
+ rc_map->name = NULL;
+ return -ENOMEM;
+ }
+
+ dev_dbg(&dev->dev, "Allocated space for %u keycode entries (%u bytes)\n",
+ rc_map->size, rc_map->alloc);
+ return 0;
+}
+
+/**
+ * ir_free_table() - frees memory allocated by a scancode table
+ * @rc_map: the table whose mappings need to be freed
+ *
+ * This routine will free memory alloctaed for key mappings used by given
+ * scancode table.
+ */
+static void ir_free_table(struct rc_map *rc_map)
+{
+ rc_map->size = 0;
+ kfree(rc_map->name);
+ rc_map->name = NULL;
+ kfree(rc_map->scan);
+ rc_map->scan = NULL;
+}
+
+/**
+ * ir_resize_table() - resizes a scancode table if necessary
+ * @dev: the rc_dev device
+ * @rc_map: the rc_map to resize
+ * @gfp_flags: gfp flags to use when allocating memory
+ *
+ * This routine will shrink the rc_map if it has lots of
+ * unused entries and grow it if it is full.
+ *
+ * return: zero on success or a negative error code
+ */
+static int ir_resize_table(struct rc_dev *dev, struct rc_map *rc_map,
+ gfp_t gfp_flags)
+{
+ unsigned int oldalloc = rc_map->alloc;
+ unsigned int newalloc = oldalloc;
+ struct rc_map_table *oldscan = rc_map->scan;
+ struct rc_map_table *newscan;
+
+ if (rc_map->size == rc_map->len) {
+ /* All entries in use -> grow keytable */
+ if (rc_map->alloc >= IR_TAB_MAX_SIZE)
+ return -ENOMEM;
+
+ newalloc *= 2;
+ dev_dbg(&dev->dev, "Growing table to %u bytes\n", newalloc);
+ }
+
+ if ((rc_map->len * 3 < rc_map->size) && (oldalloc > IR_TAB_MIN_SIZE)) {
+ /* Less than 1/3 of entries in use -> shrink keytable */
+ newalloc /= 2;
+ dev_dbg(&dev->dev, "Shrinking table to %u bytes\n", newalloc);
+ }
+
+ if (newalloc == oldalloc)
+ return 0;
+
+ newscan = kmalloc(newalloc, gfp_flags);
+ if (!newscan)
+ return -ENOMEM;
+
+ memcpy(newscan, rc_map->scan, rc_map->len * sizeof(struct rc_map_table));
+ rc_map->scan = newscan;
+ rc_map->alloc = newalloc;
+ rc_map->size = rc_map->alloc / sizeof(struct rc_map_table);
+ kfree(oldscan);
+ return 0;
+}
+
+/**
+ * ir_update_mapping() - set a keycode in the scancode->keycode table
+ * @dev: the struct rc_dev device descriptor
+ * @rc_map: scancode table to be adjusted
+ * @index: index of the mapping that needs to be updated
+ * @new_keycode: the desired keycode
+ *
+ * This routine is used to update scancode->keycode mapping at given
+ * position.
+ *
+ * return: previous keycode assigned to the mapping
+ *
+ */
+static unsigned int ir_update_mapping(struct rc_dev *dev,
+ struct rc_map *rc_map,
+ unsigned int index,
+ unsigned int new_keycode)
+{
+ int old_keycode = rc_map->scan[index].keycode;
+ int i;
+
+ /* Did the user wish to remove the mapping? */
+ if (new_keycode == KEY_RESERVED || new_keycode == KEY_UNKNOWN) {
+ dev_dbg(&dev->dev, "#%d: Deleting scan 0x%04x\n",
+ index, rc_map->scan[index].scancode);
+ rc_map->len--;
+ memmove(&rc_map->scan[index], &rc_map->scan[index+ 1],
+ (rc_map->len - index) * sizeof(struct rc_map_table));
+ } else {
+ dev_dbg(&dev->dev, "#%d: %s scan 0x%04x with key 0x%04x\n",
+ index,
+ old_keycode == KEY_RESERVED ? "New" : "Replacing",
+ rc_map->scan[index].scancode, new_keycode);
+ rc_map->scan[index].keycode = new_keycode;
+ __set_bit(new_keycode, dev->input_dev->keybit);
+ }
+
+ if (old_keycode != KEY_RESERVED) {
+ /* A previous mapping was updated... */
+ __clear_bit(old_keycode, dev->input_dev->keybit);
+ /* ... but another scancode might use the same keycode */
+ for (i = 0; i < rc_map->len; i++) {
+ if (rc_map->scan[i].keycode == old_keycode) {
+ __set_bit(old_keycode, dev->input_dev->keybit);
+ break;
+ }
+ }
+
+ /* Possibly shrink the keytable, failure is not a problem */
+ ir_resize_table(dev, rc_map, GFP_ATOMIC);
+ }
+
+ return old_keycode;
+}
+
+/**
+ * ir_establish_scancode() - set a keycode in the scancode->keycode table
+ * @dev: the struct rc_dev device descriptor
+ * @rc_map: scancode table to be searched
+ * @scancode: the desired scancode
+ * @resize: controls whether we allowed to resize the table to
+ * accommodate not yet present scancodes
+ *
+ * This routine is used to locate given scancode in rc_map.
+ * If scancode is not yet present the routine will allocate a new slot
+ * for it.
+ *
+ * return: index of the mapping containing scancode in question
+ * or -1U in case of failure.
+ */
+static unsigned int ir_establish_scancode(struct rc_dev *dev,
+ struct rc_map *rc_map,
+ unsigned int scancode,
+ bool resize)
+{
+ unsigned int i;
+
+ /*
+ * Unfortunately, some hardware-based IR decoders don't provide
+ * all bits for the complete IR code. In general, they provide only
+ * the command part of the IR code. Yet, as it is possible to replace
+ * the provided IR with another one, it is needed to allow loading
+ * IR tables from other remotes. So, we support specifying a mask to
+ * indicate the valid bits of the scancodes.
+ */
+ if (dev->scancode_mask)
+ scancode &= dev->scancode_mask;
+
+ /* First check if we already have a mapping for this ir command */
+ for (i = 0; i < rc_map->len; i++) {
+ if (rc_map->scan[i].scancode == scancode)
+ return i;
+
+ /* Keytable is sorted from lowest to highest scancode */
+ if (rc_map->scan[i].scancode >= scancode)
+ break;
+ }
+
+ /* No previous mapping found, we might need to grow the table */
+ if (rc_map->size == rc_map->len) {
+ if (!resize || ir_resize_table(dev, rc_map, GFP_ATOMIC))
+ return -1U;
+ }
+
+ /* i is the proper index to insert our new keycode */
+ if (i < rc_map->len)
+ memmove(&rc_map->scan[i + 1], &rc_map->scan[i],
+ (rc_map->len - i) * sizeof(struct rc_map_table));
+ rc_map->scan[i].scancode = scancode;
+ rc_map->scan[i].keycode = KEY_RESERVED;
+ rc_map->len++;
+
+ return i;
+}
+
+/**
+ * ir_setkeycode() - set a keycode in the scancode->keycode table
+ * @idev: the struct input_dev device descriptor
+ * @ke: Input keymap entry
+ * @old_keycode: result
+ *
+ * This routine is used to handle evdev EVIOCSKEY ioctl.
+ *
+ * return: -EINVAL if the keycode could not be inserted, otherwise zero.
+ */
+static int ir_setkeycode(struct input_dev *idev,
+ const struct input_keymap_entry *ke,
+ unsigned int *old_keycode)
+{
+ struct rc_dev *rdev = input_get_drvdata(idev);
+ struct rc_map *rc_map = &rdev->rc_map;
+ unsigned int index;
+ unsigned int scancode;
+ int retval = 0;
+ unsigned long flags;
+
+ spin_lock_irqsave(&rc_map->lock, flags);
+
+ if (ke->flags & INPUT_KEYMAP_BY_INDEX) {
+ index = ke->index;
+ if (index >= rc_map->len) {
+ retval = -EINVAL;
+ goto out;
+ }
+ } else {
+ retval = input_scancode_to_scalar(ke, &scancode);
+ if (retval)
+ goto out;
+
+ index = ir_establish_scancode(rdev, rc_map, scancode, true);
+ if (index >= rc_map->len) {
+ retval = -ENOMEM;
+ goto out;
+ }
+ }
+
+ *old_keycode = ir_update_mapping(rdev, rc_map, index, ke->keycode);
+
+out:
+ spin_unlock_irqrestore(&rc_map->lock, flags);
+ return retval;
+}
+
+/**
+ * ir_setkeytable() - sets several entries in the scancode->keycode table
+ * @dev: the struct rc_dev device descriptor
+ * @from: the struct rc_map to copy entries from
+ *
+ * This routine is used to handle table initialization.
+ *
+ * return: -ENOMEM if all keycodes could not be inserted, otherwise zero.
+ */
+static int ir_setkeytable(struct rc_dev *dev,
+ const struct rc_map *from)
+{
+ struct rc_map *rc_map = &dev->rc_map;
+ unsigned int i, index;
+ int rc;
+
+ rc = ir_create_table(dev, rc_map, from->name, from->rc_proto,
+ from->size);
+ if (rc)
+ return rc;
+
+ for (i = 0; i < from->size; i++) {
+ index = ir_establish_scancode(dev, rc_map,
+ from->scan[i].scancode, false);
+ if (index >= rc_map->len) {
+ rc = -ENOMEM;
+ break;
+ }
+
+ ir_update_mapping(dev, rc_map, index,
+ from->scan[i].keycode);
+ }
+
+ if (rc)
+ ir_free_table(rc_map);
+
+ return rc;
+}
+
+static int rc_map_cmp(const void *key, const void *elt)
+{
+ const unsigned int *scancode = key;
+ const struct rc_map_table *e = elt;
+
+ if (*scancode < e->scancode)
+ return -1;
+ else if (*scancode > e->scancode)
+ return 1;
+ return 0;
+}
+
+/**
+ * ir_lookup_by_scancode() - locate mapping by scancode
+ * @rc_map: the struct rc_map to search
+ * @scancode: scancode to look for in the table
+ *
+ * This routine performs binary search in RC keykeymap table for
+ * given scancode.
+ *
+ * return: index in the table, -1U if not found
+ */
+static unsigned int ir_lookup_by_scancode(const struct rc_map *rc_map,
+ unsigned int scancode)
+{
+ struct rc_map_table *res;
+
+ res = bsearch(&scancode, rc_map->scan, rc_map->len,
+ sizeof(struct rc_map_table), rc_map_cmp);
+ if (!res)
+ return -1U;
+ else
+ return res - rc_map->scan;
+}
+
+/**
+ * ir_getkeycode() - get a keycode from the scancode->keycode table
+ * @idev: the struct input_dev device descriptor
+ * @ke: Input keymap entry
+ *
+ * This routine is used to handle evdev EVIOCGKEY ioctl.
+ *
+ * return: always returns zero.
+ */
+static int ir_getkeycode(struct input_dev *idev,
+ struct input_keymap_entry *ke)
+{
+ struct rc_dev *rdev = input_get_drvdata(idev);
+ struct rc_map *rc_map = &rdev->rc_map;
+ struct rc_map_table *entry;
+ unsigned long flags;
+ unsigned int index;
+ unsigned int scancode;
+ int retval;
+
+ spin_lock_irqsave(&rc_map->lock, flags);
+
+ if (ke->flags & INPUT_KEYMAP_BY_INDEX) {
+ index = ke->index;
+ } else {
+ retval = input_scancode_to_scalar(ke, &scancode);
+ if (retval)
+ goto out;
+
+ index = ir_lookup_by_scancode(rc_map, scancode);
+ }
+
+ if (index < rc_map->len) {
+ entry = &rc_map->scan[index];
+
+ ke->index = index;
+ ke->keycode = entry->keycode;
+ ke->len = sizeof(entry->scancode);
+ memcpy(ke->scancode, &entry->scancode, sizeof(entry->scancode));
+
+ } else if (!(ke->flags & INPUT_KEYMAP_BY_INDEX)) {
+ /*
+ * We do not really know the valid range of scancodes
+ * so let's respond with KEY_RESERVED to anything we
+ * do not have mapping for [yet].
+ */
+ ke->index = index;
+ ke->keycode = KEY_RESERVED;
+ } else {
+ retval = -EINVAL;
+ goto out;
+ }
+
+ retval = 0;
+
+out:
+ spin_unlock_irqrestore(&rc_map->lock, flags);
+ return retval;
+}
+
+/**
+ * rc_g_keycode_from_table() - gets the keycode that corresponds to a scancode
+ * @dev: the struct rc_dev descriptor of the device
+ * @scancode: the scancode to look for
+ *
+ * This routine is used by drivers which need to convert a scancode to a
+ * keycode. Normally it should not be used since drivers should have no
+ * interest in keycodes.
+ *
+ * return: the corresponding keycode, or KEY_RESERVED
+ */
+u32 rc_g_keycode_from_table(struct rc_dev *dev, u32 scancode)
+{
+ struct rc_map *rc_map = &dev->rc_map;
+ unsigned int keycode;
+ unsigned int index;
+ unsigned long flags;
+
+ spin_lock_irqsave(&rc_map->lock, flags);
+
+ index = ir_lookup_by_scancode(rc_map, scancode);
+ keycode = index < rc_map->len ?
+ rc_map->scan[index].keycode : KEY_RESERVED;
+
+ spin_unlock_irqrestore(&rc_map->lock, flags);
+
+ if (keycode != KEY_RESERVED)
+ dev_dbg(&dev->dev, "%s: scancode 0x%04x keycode 0x%02x\n",
+ dev->device_name, scancode, keycode);
+
+ return keycode;
+}
+EXPORT_SYMBOL_GPL(rc_g_keycode_from_table);
+
+/**
+ * ir_do_keyup() - internal function to signal the release of a keypress
+ * @dev: the struct rc_dev descriptor of the device
+ * @sync: whether or not to call input_sync
+ *
+ * This function is used internally to release a keypress, it must be
+ * called with keylock held.
+ */
+static void ir_do_keyup(struct rc_dev *dev, bool sync)
+{
+ if (!dev->keypressed)
+ return;
+
+ dev_dbg(&dev->dev, "keyup key 0x%04x\n", dev->last_keycode);
+ del_timer(&dev->timer_repeat);
+ input_report_key(dev->input_dev, dev->last_keycode, 0);
+ led_trigger_event(led_feedback, LED_OFF);
+ if (sync)
+ input_sync(dev->input_dev);
+ dev->keypressed = false;
+}
+
+/**
+ * rc_keyup() - signals the release of a keypress
+ * @dev: the struct rc_dev descriptor of the device
+ *
+ * This routine is used to signal that a key has been released on the
+ * remote control.
+ */
+void rc_keyup(struct rc_dev *dev)
+{
+ unsigned long flags;
+
+ spin_lock_irqsave(&dev->keylock, flags);
+ ir_do_keyup(dev, true);
+ spin_unlock_irqrestore(&dev->keylock, flags);
+}
+EXPORT_SYMBOL_GPL(rc_keyup);
+
+/**
+ * ir_timer_keyup() - generates a keyup event after a timeout
+ *
+ * @t: a pointer to the struct timer_list
+ *
+ * This routine will generate a keyup event some time after a keydown event
+ * is generated when no further activity has been detected.
+ */
+static void ir_timer_keyup(struct timer_list *t)
+{
+ struct rc_dev *dev = from_timer(dev, t, timer_keyup);
+ unsigned long flags;
+
+ /*
+ * ir->keyup_jiffies is used to prevent a race condition if a
+ * hardware interrupt occurs at this point and the keyup timer
+ * event is moved further into the future as a result.
+ *
+ * The timer will then be reactivated and this function called
+ * again in the future. We need to exit gracefully in that case
+ * to allow the input subsystem to do its auto-repeat magic or
+ * a keyup event might follow immediately after the keydown.
+ */
+ spin_lock_irqsave(&dev->keylock, flags);
+ if (time_is_before_eq_jiffies(dev->keyup_jiffies))
+ ir_do_keyup(dev, true);
+ spin_unlock_irqrestore(&dev->keylock, flags);
+}
+
+/**
+ * ir_timer_repeat() - generates a repeat event after a timeout
+ *
+ * @t: a pointer to the struct timer_list
+ *
+ * This routine will generate a soft repeat event every REP_PERIOD
+ * milliseconds.
+ */
+static void ir_timer_repeat(struct timer_list *t)
+{
+ struct rc_dev *dev = from_timer(dev, t, timer_repeat);
+ struct input_dev *input = dev->input_dev;
+ unsigned long flags;
+
+ spin_lock_irqsave(&dev->keylock, flags);
+ if (dev->keypressed) {
+ input_event(input, EV_KEY, dev->last_keycode, 2);
+ input_sync(input);
+ if (input->rep[REP_PERIOD])
+ mod_timer(&dev->timer_repeat, jiffies +
+ msecs_to_jiffies(input->rep[REP_PERIOD]));
+ }
+ spin_unlock_irqrestore(&dev->keylock, flags);
+}
+
+static unsigned int repeat_period(int protocol)
+{
+ if (protocol >= ARRAY_SIZE(protocols))
+ return 100;
+
+ return protocols[protocol].repeat_period;
+}
+
+/**
+ * rc_repeat() - signals that a key is still pressed
+ * @dev: the struct rc_dev descriptor of the device
+ *
+ * This routine is used by IR decoders when a repeat message which does
+ * not include the necessary bits to reproduce the scancode has been
+ * received.
+ */
+void rc_repeat(struct rc_dev *dev)
+{
+ unsigned long flags;
+ unsigned int timeout = nsecs_to_jiffies(dev->timeout) +
+ msecs_to_jiffies(repeat_period(dev->last_protocol));
+ struct lirc_scancode sc = {
+ .scancode = dev->last_scancode, .rc_proto = dev->last_protocol,
+ .keycode = dev->keypressed ? dev->last_keycode : KEY_RESERVED,
+ .flags = LIRC_SCANCODE_FLAG_REPEAT |
+ (dev->last_toggle ? LIRC_SCANCODE_FLAG_TOGGLE : 0)
+ };
+
+ ir_lirc_scancode_event(dev, &sc);
+
+ spin_lock_irqsave(&dev->keylock, flags);
+
+ input_event(dev->input_dev, EV_MSC, MSC_SCAN, dev->last_scancode);
+ input_sync(dev->input_dev);
+
+ if (dev->keypressed) {
+ dev->keyup_jiffies = jiffies + timeout;
+ mod_timer(&dev->timer_keyup, dev->keyup_jiffies);
+ }
+
+ spin_unlock_irqrestore(&dev->keylock, flags);
+}
+EXPORT_SYMBOL_GPL(rc_repeat);
+
+/**
+ * ir_do_keydown() - internal function to process a keypress
+ * @dev: the struct rc_dev descriptor of the device
+ * @protocol: the protocol of the keypress
+ * @scancode: the scancode of the keypress
+ * @keycode: the keycode of the keypress
+ * @toggle: the toggle value of the keypress
+ *
+ * This function is used internally to register a keypress, it must be
+ * called with keylock held.
+ */
+static void ir_do_keydown(struct rc_dev *dev, enum rc_proto protocol,
+ u32 scancode, u32 keycode, u8 toggle)
+{
+ bool new_event = (!dev->keypressed ||
+ dev->last_protocol != protocol ||
+ dev->last_scancode != scancode ||
+ dev->last_toggle != toggle);
+ struct lirc_scancode sc = {
+ .scancode = scancode, .rc_proto = protocol,
+ .flags = toggle ? LIRC_SCANCODE_FLAG_TOGGLE : 0,
+ .keycode = keycode
+ };
+
+ ir_lirc_scancode_event(dev, &sc);
+
+ if (new_event && dev->keypressed)
+ ir_do_keyup(dev, false);
+
+ input_event(dev->input_dev, EV_MSC, MSC_SCAN, scancode);
+
+ dev->last_protocol = protocol;
+ dev->last_scancode = scancode;
+ dev->last_toggle = toggle;
+ dev->last_keycode = keycode;
+
+ if (new_event && keycode != KEY_RESERVED) {
+ /* Register a keypress */
+ dev->keypressed = true;
+
+ dev_dbg(&dev->dev, "%s: key down event, key 0x%04x, protocol 0x%04x, scancode 0x%08x\n",
+ dev->device_name, keycode, protocol, scancode);
+ input_report_key(dev->input_dev, keycode, 1);
+
+ led_trigger_event(led_feedback, LED_FULL);
+ }
+
+ /*
+ * For CEC, start sending repeat messages as soon as the first
+ * repeated message is sent, as long as REP_DELAY = 0 and REP_PERIOD
+ * is non-zero. Otherwise, the input layer will generate repeat
+ * messages.
+ */
+ if (!new_event && keycode != KEY_RESERVED &&
+ dev->allowed_protocols == RC_PROTO_BIT_CEC &&
+ !timer_pending(&dev->timer_repeat) &&
+ dev->input_dev->rep[REP_PERIOD] &&
+ !dev->input_dev->rep[REP_DELAY]) {
+ input_event(dev->input_dev, EV_KEY, keycode, 2);
+ mod_timer(&dev->timer_repeat, jiffies +
+ msecs_to_jiffies(dev->input_dev->rep[REP_PERIOD]));
+ }
+
+ input_sync(dev->input_dev);
+}
+
+/**
+ * rc_keydown() - generates input event for a key press
+ * @dev: the struct rc_dev descriptor of the device
+ * @protocol: the protocol for the keypress
+ * @scancode: the scancode for the keypress
+ * @toggle: the toggle value (protocol dependent, if the protocol doesn't
+ * support toggle values, this should be set to zero)
+ *
+ * This routine is used to signal that a key has been pressed on the
+ * remote control.
+ */
+void rc_keydown(struct rc_dev *dev, enum rc_proto protocol, u32 scancode,
+ u8 toggle)
+{
+ unsigned long flags;
+ u32 keycode = rc_g_keycode_from_table(dev, scancode);
+
+ spin_lock_irqsave(&dev->keylock, flags);
+ ir_do_keydown(dev, protocol, scancode, keycode, toggle);
+
+ if (dev->keypressed) {
+ dev->keyup_jiffies = jiffies + nsecs_to_jiffies(dev->timeout) +
+ msecs_to_jiffies(repeat_period(protocol));
+ mod_timer(&dev->timer_keyup, dev->keyup_jiffies);
+ }
+ spin_unlock_irqrestore(&dev->keylock, flags);
+}
+EXPORT_SYMBOL_GPL(rc_keydown);
+
+/**
+ * rc_keydown_notimeout() - generates input event for a key press without
+ * an automatic keyup event at a later time
+ * @dev: the struct rc_dev descriptor of the device
+ * @protocol: the protocol for the keypress
+ * @scancode: the scancode for the keypress
+ * @toggle: the toggle value (protocol dependent, if the protocol doesn't
+ * support toggle values, this should be set to zero)
+ *
+ * This routine is used to signal that a key has been pressed on the
+ * remote control. The driver must manually call rc_keyup() at a later stage.
+ */
+void rc_keydown_notimeout(struct rc_dev *dev, enum rc_proto protocol,
+ u32 scancode, u8 toggle)
+{
+ unsigned long flags;
+ u32 keycode = rc_g_keycode_from_table(dev, scancode);
+
+ spin_lock_irqsave(&dev->keylock, flags);
+ ir_do_keydown(dev, protocol, scancode, keycode, toggle);
+ spin_unlock_irqrestore(&dev->keylock, flags);
+}
+EXPORT_SYMBOL_GPL(rc_keydown_notimeout);
+
+/**
+ * rc_validate_scancode() - checks that a scancode is valid for a protocol.
+ * For nec, it should do the opposite of ir_nec_bytes_to_scancode()
+ * @proto: protocol
+ * @scancode: scancode
+ */
+bool rc_validate_scancode(enum rc_proto proto, u32 scancode)
+{
+ switch (proto) {
+ /*
+ * NECX has a 16-bit address; if the lower 8 bits match the upper
+ * 8 bits inverted, then the address would match regular nec.
+ */
+ case RC_PROTO_NECX:
+ if ((((scancode >> 16) ^ ~(scancode >> 8)) & 0xff) == 0)
+ return false;
+ break;
+ /*
+ * NEC32 has a 16 bit address and 16 bit command. If the lower 8 bits
+ * of the command match the upper 8 bits inverted, then it would
+ * be either NEC or NECX.
+ */
+ case RC_PROTO_NEC32:
+ if ((((scancode >> 8) ^ ~scancode) & 0xff) == 0)
+ return false;
+ break;
+ /*
+ * If the customer code (top 32-bit) is 0x800f, it is MCE else it
+ * is regular mode-6a 32 bit
+ */
+ case RC_PROTO_RC6_MCE:
+ if ((scancode & 0xffff0000) != 0x800f0000)
+ return false;
+ break;
+ case RC_PROTO_RC6_6A_32:
+ if ((scancode & 0xffff0000) == 0x800f0000)
+ return false;
+ break;
+ default:
+ break;
+ }
+
+ return true;
+}
+
+/**
+ * rc_validate_filter() - checks that the scancode and mask are valid and
+ * provides sensible defaults
+ * @dev: the struct rc_dev descriptor of the device
+ * @filter: the scancode and mask
+ *
+ * return: 0 or -EINVAL if the filter is not valid
+ */
+static int rc_validate_filter(struct rc_dev *dev,
+ struct rc_scancode_filter *filter)
+{
+ u32 mask, s = filter->data;
+ enum rc_proto protocol = dev->wakeup_protocol;
+
+ if (protocol >= ARRAY_SIZE(protocols))
+ return -EINVAL;
+
+ mask = protocols[protocol].scancode_bits;
+
+ if (!rc_validate_scancode(protocol, s))
+ return -EINVAL;
+
+ filter->data &= mask;
+ filter->mask &= mask;
+
+ /*
+ * If we have to raw encode the IR for wakeup, we cannot have a mask
+ */
+ if (dev->encode_wakeup && filter->mask != 0 && filter->mask != mask)
+ return -EINVAL;
+
+ return 0;
+}
+
+int rc_open(struct rc_dev *rdev)
+{
+ int rval = 0;
+
+ if (!rdev)
+ return -EINVAL;
+
+ mutex_lock(&rdev->lock);
+
+ if (!rdev->registered) {
+ rval = -ENODEV;
+ } else {
+ if (!rdev->users++ && rdev->open)
+ rval = rdev->open(rdev);
+
+ if (rval)
+ rdev->users--;
+ }
+
+ mutex_unlock(&rdev->lock);
+
+ return rval;
+}
+
+static int ir_open(struct input_dev *idev)
+{
+ struct rc_dev *rdev = input_get_drvdata(idev);
+
+ return rc_open(rdev);
+}
+
+void rc_close(struct rc_dev *rdev)
+{
+ if (rdev) {
+ mutex_lock(&rdev->lock);
+
+ if (!--rdev->users && rdev->close && rdev->registered)
+ rdev->close(rdev);
+
+ mutex_unlock(&rdev->lock);
+ }
+}
+
+static void ir_close(struct input_dev *idev)
+{
+ struct rc_dev *rdev = input_get_drvdata(idev);
+ rc_close(rdev);
+}
+
+/* class for /sys/class/rc */
+static char *rc_devnode(struct device *dev, umode_t *mode)
+{
+ return kasprintf(GFP_KERNEL, "rc/%s", dev_name(dev));
+}
+
+static struct class rc_class = {
+ .name = "rc",
+ .devnode = rc_devnode,
+};
+
+/*
+ * These are the protocol textual descriptions that are
+ * used by the sysfs protocols file. Note that the order
+ * of the entries is relevant.
+ */
+static const struct {
+ u64 type;
+ const char *name;
+ const char *module_name;
+} proto_names[] = {
+ { RC_PROTO_BIT_NONE, "none", NULL },
+ { RC_PROTO_BIT_OTHER, "other", NULL },
+ { RC_PROTO_BIT_UNKNOWN, "unknown", NULL },
+ { RC_PROTO_BIT_RC5 |
+ RC_PROTO_BIT_RC5X_20, "rc-5", "ir-rc5-decoder" },
+ { RC_PROTO_BIT_NEC |
+ RC_PROTO_BIT_NECX |
+ RC_PROTO_BIT_NEC32, "nec", "ir-nec-decoder" },
+ { RC_PROTO_BIT_RC6_0 |
+ RC_PROTO_BIT_RC6_6A_20 |
+ RC_PROTO_BIT_RC6_6A_24 |
+ RC_PROTO_BIT_RC6_6A_32 |
+ RC_PROTO_BIT_RC6_MCE, "rc-6", "ir-rc6-decoder" },
+ { RC_PROTO_BIT_JVC, "jvc", "ir-jvc-decoder" },
+ { RC_PROTO_BIT_SONY12 |
+ RC_PROTO_BIT_SONY15 |
+ RC_PROTO_BIT_SONY20, "sony", "ir-sony-decoder" },
+ { RC_PROTO_BIT_RC5_SZ, "rc-5-sz", "ir-rc5-decoder" },
+ { RC_PROTO_BIT_SANYO, "sanyo", "ir-sanyo-decoder" },
+ { RC_PROTO_BIT_SHARP, "sharp", "ir-sharp-decoder" },
+ { RC_PROTO_BIT_MCIR2_KBD |
+ RC_PROTO_BIT_MCIR2_MSE, "mce_kbd", "ir-mce_kbd-decoder" },
+ { RC_PROTO_BIT_XMP, "xmp", "ir-xmp-decoder" },
+ { RC_PROTO_BIT_CEC, "cec", NULL },
+ { RC_PROTO_BIT_IMON, "imon", "ir-imon-decoder" },
+};
+
+/**
+ * struct rc_filter_attribute - Device attribute relating to a filter type.
+ * @attr: Device attribute.
+ * @type: Filter type.
+ * @mask: false for filter value, true for filter mask.
+ */
+struct rc_filter_attribute {
+ struct device_attribute attr;
+ enum rc_filter_type type;
+ bool mask;
+};
+#define to_rc_filter_attr(a) container_of(a, struct rc_filter_attribute, attr)
+
+#define RC_FILTER_ATTR(_name, _mode, _show, _store, _type, _mask) \
+ struct rc_filter_attribute dev_attr_##_name = { \
+ .attr = __ATTR(_name, _mode, _show, _store), \
+ .type = (_type), \
+ .mask = (_mask), \
+ }
+
+/**
+ * show_protocols() - shows the current IR protocol(s)
+ * @device: the device descriptor
+ * @mattr: the device attribute struct
+ * @buf: a pointer to the output buffer
+ *
+ * This routine is a callback routine for input read the IR protocol type(s).
+ * it is trigged by reading /sys/class/rc/rc?/protocols.
+ * It returns the protocol names of supported protocols.
+ * Enabled protocols are printed in brackets.
+ *
+ * dev->lock is taken to guard against races between
+ * store_protocols and show_protocols.
+ */
+static ssize_t show_protocols(struct device *device,
+ struct device_attribute *mattr, char *buf)
+{
+ struct rc_dev *dev = to_rc_dev(device);
+ u64 allowed, enabled;
+ char *tmp = buf;
+ int i;
+
+ mutex_lock(&dev->lock);
+
+ enabled = dev->enabled_protocols;
+ allowed = dev->allowed_protocols;
+ if (dev->raw && !allowed)
+ allowed = ir_raw_get_allowed_protocols();
+
+ mutex_unlock(&dev->lock);
+
+ dev_dbg(&dev->dev, "%s: allowed - 0x%llx, enabled - 0x%llx\n",
+ __func__, (long long)allowed, (long long)enabled);
+
+ for (i = 0; i < ARRAY_SIZE(proto_names); i++) {
+ if (allowed & enabled & proto_names[i].type)
+ tmp += sprintf(tmp, "[%s] ", proto_names[i].name);
+ else if (allowed & proto_names[i].type)
+ tmp += sprintf(tmp, "%s ", proto_names[i].name);
+
+ if (allowed & proto_names[i].type)
+ allowed &= ~proto_names[i].type;
+ }
+
+#ifdef CONFIG_LIRC
+ if (dev->driver_type == RC_DRIVER_IR_RAW)
+ tmp += sprintf(tmp, "[lirc] ");
+#endif
+
+ if (tmp != buf)
+ tmp--;
+ *tmp = '\n';
+
+ return tmp + 1 - buf;
+}
+
+/**
+ * parse_protocol_change() - parses a protocol change request
+ * @dev: rc_dev device
+ * @protocols: pointer to the bitmask of current protocols
+ * @buf: pointer to the buffer with a list of changes
+ *
+ * Writing "+proto" will add a protocol to the protocol mask.
+ * Writing "-proto" will remove a protocol from protocol mask.
+ * Writing "proto" will enable only "proto".
+ * Writing "none" will disable all protocols.
+ * Returns the number of changes performed or a negative error code.
+ */
+static int parse_protocol_change(struct rc_dev *dev, u64 *protocols,
+ const char *buf)
+{
+ const char *tmp;
+ unsigned count = 0;
+ bool enable, disable;
+ u64 mask;
+ int i;
+
+ while ((tmp = strsep((char **)&buf, " \n")) != NULL) {
+ if (!*tmp)
+ break;
+
+ if (*tmp == '+') {
+ enable = true;
+ disable = false;
+ tmp++;
+ } else if (*tmp == '-') {
+ enable = false;
+ disable = true;
+ tmp++;
+ } else {
+ enable = false;
+ disable = false;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(proto_names); i++) {
+ if (!strcasecmp(tmp, proto_names[i].name)) {
+ mask = proto_names[i].type;
+ break;
+ }
+ }
+
+ if (i == ARRAY_SIZE(proto_names)) {
+ if (!strcasecmp(tmp, "lirc"))
+ mask = 0;
+ else {
+ dev_dbg(&dev->dev, "Unknown protocol: '%s'\n",
+ tmp);
+ return -EINVAL;
+ }
+ }
+
+ count++;
+
+ if (enable)
+ *protocols |= mask;
+ else if (disable)
+ *protocols &= ~mask;
+ else
+ *protocols = mask;
+ }
+
+ if (!count) {
+ dev_dbg(&dev->dev, "Protocol not specified\n");
+ return -EINVAL;
+ }
+
+ return count;
+}
+
+void ir_raw_load_modules(u64 *protocols)
+{
+ u64 available;
+ int i, ret;
+
+ for (i = 0; i < ARRAY_SIZE(proto_names); i++) {
+ if (proto_names[i].type == RC_PROTO_BIT_NONE ||
+ proto_names[i].type & (RC_PROTO_BIT_OTHER |
+ RC_PROTO_BIT_UNKNOWN))
+ continue;
+
+ available = ir_raw_get_allowed_protocols();
+ if (!(*protocols & proto_names[i].type & ~available))
+ continue;
+
+ if (!proto_names[i].module_name) {
+ pr_err("Can't enable IR protocol %s\n",
+ proto_names[i].name);
+ *protocols &= ~proto_names[i].type;
+ continue;
+ }
+
+ ret = request_module("%s", proto_names[i].module_name);
+ if (ret < 0) {
+ pr_err("Couldn't load IR protocol module %s\n",
+ proto_names[i].module_name);
+ *protocols &= ~proto_names[i].type;
+ continue;
+ }
+ msleep(20);
+ available = ir_raw_get_allowed_protocols();
+ if (!(*protocols & proto_names[i].type & ~available))
+ continue;
+
+ pr_err("Loaded IR protocol module %s, but protocol %s still not available\n",
+ proto_names[i].module_name,
+ proto_names[i].name);
+ *protocols &= ~proto_names[i].type;
+ }
+}
+
+/**
+ * store_protocols() - changes the current/wakeup IR protocol(s)
+ * @device: the device descriptor
+ * @mattr: the device attribute struct
+ * @buf: a pointer to the input buffer
+ * @len: length of the input buffer
+ *
+ * This routine is for changing the IR protocol type.
+ * It is trigged by writing to /sys/class/rc/rc?/[wakeup_]protocols.
+ * See parse_protocol_change() for the valid commands.
+ * Returns @len on success or a negative error code.
+ *
+ * dev->lock is taken to guard against races between
+ * store_protocols and show_protocols.
+ */
+static ssize_t store_protocols(struct device *device,
+ struct device_attribute *mattr,
+ const char *buf, size_t len)
+{
+ struct rc_dev *dev = to_rc_dev(device);
+ u64 *current_protocols;
+ struct rc_scancode_filter *filter;
+ u64 old_protocols, new_protocols;
+ ssize_t rc;
+
+ dev_dbg(&dev->dev, "Normal protocol change requested\n");
+ current_protocols = &dev->enabled_protocols;
+ filter = &dev->scancode_filter;
+
+ if (!dev->change_protocol) {
+ dev_dbg(&dev->dev, "Protocol switching not supported\n");
+ return -EINVAL;
+ }
+
+ mutex_lock(&dev->lock);
+
+ old_protocols = *current_protocols;
+ new_protocols = old_protocols;
+ rc = parse_protocol_change(dev, &new_protocols, buf);
+ if (rc < 0)
+ goto out;
+
+ if (dev->driver_type == RC_DRIVER_IR_RAW)
+ ir_raw_load_modules(&new_protocols);
+
+ rc = dev->change_protocol(dev, &new_protocols);
+ if (rc < 0) {
+ dev_dbg(&dev->dev, "Error setting protocols to 0x%llx\n",
+ (long long)new_protocols);
+ goto out;
+ }
+
+ if (new_protocols != old_protocols) {
+ *current_protocols = new_protocols;
+ dev_dbg(&dev->dev, "Protocols changed to 0x%llx\n",
+ (long long)new_protocols);
+ }
+
+ /*
+ * If a protocol change was attempted the filter may need updating, even
+ * if the actual protocol mask hasn't changed (since the driver may have
+ * cleared the filter).
+ * Try setting the same filter with the new protocol (if any).
+ * Fall back to clearing the filter.
+ */
+ if (dev->s_filter && filter->mask) {
+ if (new_protocols)
+ rc = dev->s_filter(dev, filter);
+ else
+ rc = -1;
+
+ if (rc < 0) {
+ filter->data = 0;
+ filter->mask = 0;
+ dev->s_filter(dev, filter);
+ }
+ }
+
+ rc = len;
+
+out:
+ mutex_unlock(&dev->lock);
+ return rc;
+}
+
+/**
+ * show_filter() - shows the current scancode filter value or mask
+ * @device: the device descriptor
+ * @attr: the device attribute struct
+ * @buf: a pointer to the output buffer
+ *
+ * This routine is a callback routine to read a scancode filter value or mask.
+ * It is trigged by reading /sys/class/rc/rc?/[wakeup_]filter[_mask].
+ * It prints the current scancode filter value or mask of the appropriate filter
+ * type in hexadecimal into @buf and returns the size of the buffer.
+ *
+ * Bits of the filter value corresponding to set bits in the filter mask are
+ * compared against input scancodes and non-matching scancodes are discarded.
+ *
+ * dev->lock is taken to guard against races between
+ * store_filter and show_filter.
+ */
+static ssize_t show_filter(struct device *device,
+ struct device_attribute *attr,
+ char *buf)
+{
+ struct rc_dev *dev = to_rc_dev(device);
+ struct rc_filter_attribute *fattr = to_rc_filter_attr(attr);
+ struct rc_scancode_filter *filter;
+ u32 val;
+
+ mutex_lock(&dev->lock);
+
+ if (fattr->type == RC_FILTER_NORMAL)
+ filter = &dev->scancode_filter;
+ else
+ filter = &dev->scancode_wakeup_filter;
+
+ if (fattr->mask)
+ val = filter->mask;
+ else
+ val = filter->data;
+ mutex_unlock(&dev->lock);
+
+ return sprintf(buf, "%#x\n", val);
+}
+
+/**
+ * store_filter() - changes the scancode filter value
+ * @device: the device descriptor
+ * @attr: the device attribute struct
+ * @buf: a pointer to the input buffer
+ * @len: length of the input buffer
+ *
+ * This routine is for changing a scancode filter value or mask.
+ * It is trigged by writing to /sys/class/rc/rc?/[wakeup_]filter[_mask].
+ * Returns -EINVAL if an invalid filter value for the current protocol was
+ * specified or if scancode filtering is not supported by the driver, otherwise
+ * returns @len.
+ *
+ * Bits of the filter value corresponding to set bits in the filter mask are
+ * compared against input scancodes and non-matching scancodes are discarded.
+ *
+ * dev->lock is taken to guard against races between
+ * store_filter and show_filter.
+ */
+static ssize_t store_filter(struct device *device,
+ struct device_attribute *attr,
+ const char *buf, size_t len)
+{
+ struct rc_dev *dev = to_rc_dev(device);
+ struct rc_filter_attribute *fattr = to_rc_filter_attr(attr);
+ struct rc_scancode_filter new_filter, *filter;
+ int ret;
+ unsigned long val;
+ int (*set_filter)(struct rc_dev *dev, struct rc_scancode_filter *filter);
+
+ ret = kstrtoul(buf, 0, &val);
+ if (ret < 0)
+ return ret;
+
+ if (fattr->type == RC_FILTER_NORMAL) {
+ set_filter = dev->s_filter;
+ filter = &dev->scancode_filter;
+ } else {
+ set_filter = dev->s_wakeup_filter;
+ filter = &dev->scancode_wakeup_filter;
+ }
+
+ if (!set_filter)
+ return -EINVAL;
+
+ mutex_lock(&dev->lock);
+
+ new_filter = *filter;
+ if (fattr->mask)
+ new_filter.mask = val;
+ else
+ new_filter.data = val;
+
+ if (fattr->type == RC_FILTER_WAKEUP) {
+ /*
+ * Refuse to set a filter unless a protocol is enabled
+ * and the filter is valid for that protocol
+ */
+ if (dev->wakeup_protocol != RC_PROTO_UNKNOWN)
+ ret = rc_validate_filter(dev, &new_filter);
+ else
+ ret = -EINVAL;
+
+ if (ret != 0)
+ goto unlock;
+ }
+
+ if (fattr->type == RC_FILTER_NORMAL && !dev->enabled_protocols &&
+ val) {
+ /* refuse to set a filter unless a protocol is enabled */
+ ret = -EINVAL;
+ goto unlock;
+ }
+
+ ret = set_filter(dev, &new_filter);
+ if (ret < 0)
+ goto unlock;
+
+ *filter = new_filter;
+
+unlock:
+ mutex_unlock(&dev->lock);
+ return (ret < 0) ? ret : len;
+}
+
+/**
+ * show_wakeup_protocols() - shows the wakeup IR protocol
+ * @device: the device descriptor
+ * @mattr: the device attribute struct
+ * @buf: a pointer to the output buffer
+ *
+ * This routine is a callback routine for input read the IR protocol type(s).
+ * it is trigged by reading /sys/class/rc/rc?/wakeup_protocols.
+ * It returns the protocol names of supported protocols.
+ * The enabled protocols are printed in brackets.
+ *
+ * dev->lock is taken to guard against races between
+ * store_wakeup_protocols and show_wakeup_protocols.
+ */
+static ssize_t show_wakeup_protocols(struct device *device,
+ struct device_attribute *mattr,
+ char *buf)
+{
+ struct rc_dev *dev = to_rc_dev(device);
+ u64 allowed;
+ enum rc_proto enabled;
+ char *tmp = buf;
+ int i;
+
+ mutex_lock(&dev->lock);
+
+ allowed = dev->allowed_wakeup_protocols;
+ enabled = dev->wakeup_protocol;
+
+ mutex_unlock(&dev->lock);
+
+ dev_dbg(&dev->dev, "%s: allowed - 0x%llx, enabled - %d\n",
+ __func__, (long long)allowed, enabled);
+
+ for (i = 0; i < ARRAY_SIZE(protocols); i++) {
+ if (allowed & (1ULL << i)) {
+ if (i == enabled)
+ tmp += sprintf(tmp, "[%s] ", protocols[i].name);
+ else
+ tmp += sprintf(tmp, "%s ", protocols[i].name);
+ }
+ }
+
+ if (tmp != buf)
+ tmp--;
+ *tmp = '\n';
+
+ return tmp + 1 - buf;
+}
+
+/**
+ * store_wakeup_protocols() - changes the wakeup IR protocol(s)
+ * @device: the device descriptor
+ * @mattr: the device attribute struct
+ * @buf: a pointer to the input buffer
+ * @len: length of the input buffer
+ *
+ * This routine is for changing the IR protocol type.
+ * It is trigged by writing to /sys/class/rc/rc?/wakeup_protocols.
+ * Returns @len on success or a negative error code.
+ *
+ * dev->lock is taken to guard against races between
+ * store_wakeup_protocols and show_wakeup_protocols.
+ */
+static ssize_t store_wakeup_protocols(struct device *device,
+ struct device_attribute *mattr,
+ const char *buf, size_t len)
+{
+ struct rc_dev *dev = to_rc_dev(device);
+ enum rc_proto protocol;
+ ssize_t rc;
+ u64 allowed;
+ int i;
+
+ mutex_lock(&dev->lock);
+
+ allowed = dev->allowed_wakeup_protocols;
+
+ if (sysfs_streq(buf, "none")) {
+ protocol = RC_PROTO_UNKNOWN;
+ } else {
+ for (i = 0; i < ARRAY_SIZE(protocols); i++) {
+ if ((allowed & (1ULL << i)) &&
+ sysfs_streq(buf, protocols[i].name)) {
+ protocol = i;
+ break;
+ }
+ }
+
+ if (i == ARRAY_SIZE(protocols)) {
+ rc = -EINVAL;
+ goto out;
+ }
+
+ if (dev->encode_wakeup) {
+ u64 mask = 1ULL << protocol;
+
+ ir_raw_load_modules(&mask);
+ if (!mask) {
+ rc = -EINVAL;
+ goto out;
+ }
+ }
+ }
+
+ if (dev->wakeup_protocol != protocol) {
+ dev->wakeup_protocol = protocol;
+ dev_dbg(&dev->dev, "Wakeup protocol changed to %d\n", protocol);
+
+ if (protocol == RC_PROTO_RC6_MCE)
+ dev->scancode_wakeup_filter.data = 0x800f0000;
+ else
+ dev->scancode_wakeup_filter.data = 0;
+ dev->scancode_wakeup_filter.mask = 0;
+
+ rc = dev->s_wakeup_filter(dev, &dev->scancode_wakeup_filter);
+ if (rc == 0)
+ rc = len;
+ } else {
+ rc = len;
+ }
+
+out:
+ mutex_unlock(&dev->lock);
+ return rc;
+}
+
+static void rc_dev_release(struct device *device)
+{
+ struct rc_dev *dev = to_rc_dev(device);
+
+ kfree(dev);
+}
+
+#define ADD_HOTPLUG_VAR(fmt, val...) \
+ do { \
+ int err = add_uevent_var(env, fmt, val); \
+ if (err) \
+ return err; \
+ } while (0)
+
+static int rc_dev_uevent(struct device *device, struct kobj_uevent_env *env)
+{
+ struct rc_dev *dev = to_rc_dev(device);
+
+ if (dev->rc_map.name)
+ ADD_HOTPLUG_VAR("NAME=%s", dev->rc_map.name);
+ if (dev->driver_name)
+ ADD_HOTPLUG_VAR("DRV_NAME=%s", dev->driver_name);
+ if (dev->device_name)
+ ADD_HOTPLUG_VAR("DEV_NAME=%s", dev->device_name);
+
+ return 0;
+}
+
+/*
+ * Static device attribute struct with the sysfs attributes for IR's
+ */
+static struct device_attribute dev_attr_ro_protocols =
+__ATTR(protocols, 0444, show_protocols, NULL);
+static struct device_attribute dev_attr_rw_protocols =
+__ATTR(protocols, 0644, show_protocols, store_protocols);
+static DEVICE_ATTR(wakeup_protocols, 0644, show_wakeup_protocols,
+ store_wakeup_protocols);
+static RC_FILTER_ATTR(filter, S_IRUGO|S_IWUSR,
+ show_filter, store_filter, RC_FILTER_NORMAL, false);
+static RC_FILTER_ATTR(filter_mask, S_IRUGO|S_IWUSR,
+ show_filter, store_filter, RC_FILTER_NORMAL, true);
+static RC_FILTER_ATTR(wakeup_filter, S_IRUGO|S_IWUSR,
+ show_filter, store_filter, RC_FILTER_WAKEUP, false);
+static RC_FILTER_ATTR(wakeup_filter_mask, S_IRUGO|S_IWUSR,
+ show_filter, store_filter, RC_FILTER_WAKEUP, true);
+
+static struct attribute *rc_dev_rw_protocol_attrs[] = {
+ &dev_attr_rw_protocols.attr,
+ NULL,
+};
+
+static const struct attribute_group rc_dev_rw_protocol_attr_grp = {
+ .attrs = rc_dev_rw_protocol_attrs,
+};
+
+static struct attribute *rc_dev_ro_protocol_attrs[] = {
+ &dev_attr_ro_protocols.attr,
+ NULL,
+};
+
+static const struct attribute_group rc_dev_ro_protocol_attr_grp = {
+ .attrs = rc_dev_ro_protocol_attrs,
+};
+
+static struct attribute *rc_dev_filter_attrs[] = {
+ &dev_attr_filter.attr.attr,
+ &dev_attr_filter_mask.attr.attr,
+ NULL,
+};
+
+static const struct attribute_group rc_dev_filter_attr_grp = {
+ .attrs = rc_dev_filter_attrs,
+};
+
+static struct attribute *rc_dev_wakeup_filter_attrs[] = {
+ &dev_attr_wakeup_filter.attr.attr,
+ &dev_attr_wakeup_filter_mask.attr.attr,
+ &dev_attr_wakeup_protocols.attr,
+ NULL,
+};
+
+static const struct attribute_group rc_dev_wakeup_filter_attr_grp = {
+ .attrs = rc_dev_wakeup_filter_attrs,
+};
+
+static const struct device_type rc_dev_type = {
+ .release = rc_dev_release,
+ .uevent = rc_dev_uevent,
+};
+
+struct rc_dev *rc_allocate_device(enum rc_driver_type type)
+{
+ struct rc_dev *dev;
+
+ dev = kzalloc(sizeof(*dev), GFP_KERNEL);
+ if (!dev)
+ return NULL;
+
+ if (type != RC_DRIVER_IR_RAW_TX) {
+ dev->input_dev = input_allocate_device();
+ if (!dev->input_dev) {
+ kfree(dev);
+ return NULL;
+ }
+
+ dev->input_dev->getkeycode = ir_getkeycode;
+ dev->input_dev->setkeycode = ir_setkeycode;
+ input_set_drvdata(dev->input_dev, dev);
+
+ dev->timeout = IR_DEFAULT_TIMEOUT;
+ timer_setup(&dev->timer_keyup, ir_timer_keyup, 0);
+ timer_setup(&dev->timer_repeat, ir_timer_repeat, 0);
+
+ spin_lock_init(&dev->rc_map.lock);
+ spin_lock_init(&dev->keylock);
+ }
+ mutex_init(&dev->lock);
+
+ dev->dev.type = &rc_dev_type;
+ dev->dev.class = &rc_class;
+ device_initialize(&dev->dev);
+
+ dev->driver_type = type;
+
+ __module_get(THIS_MODULE);
+ return dev;
+}
+EXPORT_SYMBOL_GPL(rc_allocate_device);
+
+void rc_free_device(struct rc_dev *dev)
+{
+ if (!dev)
+ return;
+
+ input_free_device(dev->input_dev);
+
+ put_device(&dev->dev);
+
+ /* kfree(dev) will be called by the callback function
+ rc_dev_release() */
+
+ module_put(THIS_MODULE);
+}
+EXPORT_SYMBOL_GPL(rc_free_device);
+
+static void devm_rc_alloc_release(struct device *dev, void *res)
+{
+ rc_free_device(*(struct rc_dev **)res);
+}
+
+struct rc_dev *devm_rc_allocate_device(struct device *dev,
+ enum rc_driver_type type)
+{
+ struct rc_dev **dr, *rc;
+
+ dr = devres_alloc(devm_rc_alloc_release, sizeof(*dr), GFP_KERNEL);
+ if (!dr)
+ return NULL;
+
+ rc = rc_allocate_device(type);
+ if (!rc) {
+ devres_free(dr);
+ return NULL;
+ }
+
+ rc->dev.parent = dev;
+ rc->managed_alloc = true;
+ *dr = rc;
+ devres_add(dev, dr);
+
+ return rc;
+}
+EXPORT_SYMBOL_GPL(devm_rc_allocate_device);
+
+static int rc_prepare_rx_device(struct rc_dev *dev)
+{
+ int rc;
+ struct rc_map *rc_map;
+ u64 rc_proto;
+
+ if (!dev->map_name)
+ return -EINVAL;
+
+ rc_map = rc_map_get(dev->map_name);
+ if (!rc_map)
+ rc_map = rc_map_get(RC_MAP_EMPTY);
+ if (!rc_map || !rc_map->scan || rc_map->size == 0)
+ return -EINVAL;
+
+ rc = ir_setkeytable(dev, rc_map);
+ if (rc)
+ return rc;
+
+ rc_proto = BIT_ULL(rc_map->rc_proto);
+
+ if (dev->driver_type == RC_DRIVER_SCANCODE && !dev->change_protocol)
+ dev->enabled_protocols = dev->allowed_protocols;
+
+ if (dev->driver_type == RC_DRIVER_IR_RAW)
+ ir_raw_load_modules(&rc_proto);
+
+ if (dev->change_protocol) {
+ rc = dev->change_protocol(dev, &rc_proto);
+ if (rc < 0)
+ goto out_table;
+ dev->enabled_protocols = rc_proto;
+ }
+
+ set_bit(EV_KEY, dev->input_dev->evbit);
+ set_bit(EV_REP, dev->input_dev->evbit);
+ set_bit(EV_MSC, dev->input_dev->evbit);
+ set_bit(MSC_SCAN, dev->input_dev->mscbit);
+ if (dev->open)
+ dev->input_dev->open = ir_open;
+ if (dev->close)
+ dev->input_dev->close = ir_close;
+
+ dev->input_dev->dev.parent = &dev->dev;
+ memcpy(&dev->input_dev->id, &dev->input_id, sizeof(dev->input_id));
+ dev->input_dev->phys = dev->input_phys;
+ dev->input_dev->name = dev->device_name;
+
+ return 0;
+
+out_table:
+ ir_free_table(&dev->rc_map);
+
+ return rc;
+}
+
+static int rc_setup_rx_device(struct rc_dev *dev)
+{
+ int rc;
+
+ /* rc_open will be called here */
+ rc = input_register_device(dev->input_dev);
+ if (rc)
+ return rc;
+
+ /*
+ * Default delay of 250ms is too short for some protocols, especially
+ * since the timeout is currently set to 250ms. Increase it to 500ms,
+ * to avoid wrong repetition of the keycodes. Note that this must be
+ * set after the call to input_register_device().
+ */
+ if (dev->allowed_protocols == RC_PROTO_BIT_CEC)
+ dev->input_dev->rep[REP_DELAY] = 0;
+ else
+ dev->input_dev->rep[REP_DELAY] = 500;
+
+ /*
+ * As a repeat event on protocols like RC-5 and NEC take as long as
+ * 110/114ms, using 33ms as a repeat period is not the right thing
+ * to do.
+ */
+ dev->input_dev->rep[REP_PERIOD] = 125;
+
+ return 0;
+}
+
+static void rc_free_rx_device(struct rc_dev *dev)
+{
+ if (!dev)
+ return;
+
+ if (dev->input_dev) {
+ input_unregister_device(dev->input_dev);
+ dev->input_dev = NULL;
+ }
+
+ ir_free_table(&dev->rc_map);
+}
+
+int rc_register_device(struct rc_dev *dev)
+{
+ const char *path;
+ int attr = 0;
+ int minor;
+ int rc;
+
+ if (!dev)
+ return -EINVAL;
+
+ minor = ida_simple_get(&rc_ida, 0, RC_DEV_MAX, GFP_KERNEL);
+ if (minor < 0)
+ return minor;
+
+ dev->minor = minor;
+ dev_set_name(&dev->dev, "rc%u", dev->minor);
+ dev_set_drvdata(&dev->dev, dev);
+
+ dev->dev.groups = dev->sysfs_groups;
+ if (dev->driver_type == RC_DRIVER_SCANCODE && !dev->change_protocol)
+ dev->sysfs_groups[attr++] = &rc_dev_ro_protocol_attr_grp;
+ else if (dev->driver_type != RC_DRIVER_IR_RAW_TX)
+ dev->sysfs_groups[attr++] = &rc_dev_rw_protocol_attr_grp;
+ if (dev->s_filter)
+ dev->sysfs_groups[attr++] = &rc_dev_filter_attr_grp;
+ if (dev->s_wakeup_filter)
+ dev->sysfs_groups[attr++] = &rc_dev_wakeup_filter_attr_grp;
+ dev->sysfs_groups[attr++] = NULL;
+
+ if (dev->driver_type == RC_DRIVER_IR_RAW) {
+ rc = ir_raw_event_prepare(dev);
+ if (rc < 0)
+ goto out_minor;
+ }
+
+ if (dev->driver_type != RC_DRIVER_IR_RAW_TX) {
+ rc = rc_prepare_rx_device(dev);
+ if (rc)
+ goto out_raw;
+ }
+
+ rc = device_add(&dev->dev);
+ if (rc)
+ goto out_rx_free;
+
+ path = kobject_get_path(&dev->dev.kobj, GFP_KERNEL);
+ dev_info(&dev->dev, "%s as %s\n",
+ dev->device_name ?: "Unspecified device", path ?: "N/A");
+ kfree(path);
+
+ dev->registered = true;
+
+ if (dev->driver_type != RC_DRIVER_IR_RAW_TX) {
+ rc = rc_setup_rx_device(dev);
+ if (rc)
+ goto out_dev;
+ }
+
+ /* Ensure that the lirc kfifo is setup before we start the thread */
+ if (dev->allowed_protocols != RC_PROTO_BIT_CEC) {
+ rc = ir_lirc_register(dev);
+ if (rc < 0)
+ goto out_rx;
+ }
+
+ if (dev->driver_type == RC_DRIVER_IR_RAW) {
+ rc = ir_raw_event_register(dev);
+ if (rc < 0)
+ goto out_lirc;
+ }
+
+ dev_dbg(&dev->dev, "Registered rc%u (driver: %s)\n", dev->minor,
+ dev->driver_name ? dev->driver_name : "unknown");
+
+ return 0;
+
+out_lirc:
+ if (dev->allowed_protocols != RC_PROTO_BIT_CEC)
+ ir_lirc_unregister(dev);
+out_rx:
+ rc_free_rx_device(dev);
+out_dev:
+ device_del(&dev->dev);
+out_rx_free:
+ ir_free_table(&dev->rc_map);
+out_raw:
+ ir_raw_event_free(dev);
+out_minor:
+ ida_simple_remove(&rc_ida, minor);
+ return rc;
+}
+EXPORT_SYMBOL_GPL(rc_register_device);
+
+static void devm_rc_release(struct device *dev, void *res)
+{
+ rc_unregister_device(*(struct rc_dev **)res);
+}
+
+int devm_rc_register_device(struct device *parent, struct rc_dev *dev)
+{
+ struct rc_dev **dr;
+ int ret;
+
+ dr = devres_alloc(devm_rc_release, sizeof(*dr), GFP_KERNEL);
+ if (!dr)
+ return -ENOMEM;
+
+ ret = rc_register_device(dev);
+ if (ret) {
+ devres_free(dr);
+ return ret;
+ }
+
+ *dr = dev;
+ devres_add(parent, dr);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(devm_rc_register_device);
+
+void rc_unregister_device(struct rc_dev *dev)
+{
+ if (!dev)
+ return;
+
+ if (dev->driver_type == RC_DRIVER_IR_RAW)
+ ir_raw_event_unregister(dev);
+
+ del_timer_sync(&dev->timer_keyup);
+ del_timer_sync(&dev->timer_repeat);
+
+ rc_free_rx_device(dev);
+
+ mutex_lock(&dev->lock);
+ dev->registered = false;
+ mutex_unlock(&dev->lock);
+
+ /*
+ * lirc device should be freed with dev->registered = false, so
+ * that userspace polling will get notified.
+ */
+ if (dev->allowed_protocols != RC_PROTO_BIT_CEC)
+ ir_lirc_unregister(dev);
+
+ device_del(&dev->dev);
+
+ ida_simple_remove(&rc_ida, dev->minor);
+
+ if (!dev->managed_alloc)
+ rc_free_device(dev);
+}
+
+EXPORT_SYMBOL_GPL(rc_unregister_device);
+
+/*
+ * Init/exit code for the module. Basically, creates/removes /sys/class/rc
+ */
+
+static int __init rc_core_init(void)
+{
+ int rc = class_register(&rc_class);
+ if (rc) {
+ pr_err("rc_core: unable to register rc class\n");
+ return rc;
+ }
+
+ rc = lirc_dev_init();
+ if (rc) {
+ pr_err("rc_core: unable to init lirc\n");
+ class_unregister(&rc_class);
+ return 0;
+ }
+
+ led_trigger_register_simple("rc-feedback", &led_feedback);
+ rc_map_register(&empty_map);
+
+ return 0;
+}
+
+static void __exit rc_core_exit(void)
+{
+ lirc_dev_exit();
+ class_unregister(&rc_class);
+ led_trigger_unregister_simple(led_feedback);
+ rc_map_unregister(&empty_map);
+}
+
+subsys_initcall(rc_core_init);
+module_exit(rc_core_exit);
+
+MODULE_AUTHOR("Mauro Carvalho Chehab");
+MODULE_LICENSE("GPL v2");