forked from Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
2094 lines
53 KiB
2094 lines
53 KiB
// 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 }, |
|
[RC_PROTO_RCMM12] = { .name = "rc-mm-12", |
|
.scancode_bits = 0x00000fff, .repeat_period = 114 }, |
|
[RC_PROTO_RCMM24] = { .name = "rc-mm-24", |
|
.scancode_bits = 0x00ffffff, .repeat_period = 114 }, |
|
[RC_PROTO_RCMM32] = { .name = "rc-mm-32", |
|
.scancode_bits = 0xffffffff, .repeat_period = 114 }, |
|
[RC_PROTO_XBOX_DVD] = { .name = "xbox-dvd", .repeat_period = 64 }, |
|
}; |
|
|
|
/* 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, |
|
} |
|
}; |
|
|
|
/** |
|
* scancode_to_u64() - converts scancode in &struct input_keymap_entry |
|
* @ke: keymap entry containing scancode to be converted. |
|
* @scancode: pointer to the location where converted scancode should |
|
* be stored. |
|
* |
|
* This function is a version of input_scancode_to_scalar specialized for |
|
* rc-core. |
|
*/ |
|
static int scancode_to_u64(const struct input_keymap_entry *ke, u64 *scancode) |
|
{ |
|
switch (ke->len) { |
|
case 1: |
|
*scancode = *((u8 *)ke->scancode); |
|
break; |
|
|
|
case 2: |
|
*scancode = *((u16 *)ke->scancode); |
|
break; |
|
|
|
case 4: |
|
*scancode = *((u32 *)ke->scancode); |
|
break; |
|
|
|
case 8: |
|
*scancode = *((u64 *)ke->scancode); |
|
break; |
|
|
|
default: |
|
return -EINVAL; |
|
} |
|
|
|
return 0; |
|
} |
|
|
|
/** |
|
* 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%04llx\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%04llx 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, |
|
u64 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; |
|
u64 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 = scancode_to_u64(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 u64 *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, |
|
u64 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; |
|
u64 scancode; |
|
int retval; |
|
|
|
spin_lock_irqsave(&rc_map->lock, flags); |
|
|
|
if (ke->flags & INPUT_KEYMAP_BY_INDEX) { |
|
index = ke->index; |
|
} else { |
|
retval = scancode_to_u64(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, u64 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%04llx 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 = usecs_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) |
|
}; |
|
|
|
if (dev->allowed_protocols != RC_PROTO_BIT_CEC) |
|
lirc_scancode_event(dev, &sc); |
|
|
|
spin_lock_irqsave(&dev->keylock, flags); |
|
|
|
if (dev->last_scancode <= U32_MAX) { |
|
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, |
|
u64 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 |
|
}; |
|
|
|
if (dev->allowed_protocols != RC_PROTO_BIT_CEC) |
|
lirc_scancode_event(dev, &sc); |
|
|
|
if (new_event && dev->keypressed) |
|
ir_do_keyup(dev, false); |
|
|
|
if (scancode <= U32_MAX) |
|
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%08llx\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, u64 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 + usecs_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, |
|
u64 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" }, |
|
{ RC_PROTO_BIT_RCMM12 | |
|
RC_PROTO_BIT_RCMM24 | |
|
RC_PROTO_BIT_RCMM32, "rc-mm", "ir-rcmm-decoder" }, |
|
{ RC_PROTO_BIT_XBOX_DVD, "xbox-dvd", NULL }, |
|
}; |
|
|
|
/** |
|
* 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 triggered 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 triggered 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); |
|
if (!dev->registered) { |
|
mutex_unlock(&dev->lock); |
|
return -ENODEV; |
|
} |
|
|
|
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 triggered 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 triggered 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); |
|
if (!dev->registered) { |
|
mutex_unlock(&dev->lock); |
|
return -ENODEV; |
|
} |
|
|
|
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 triggered 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 triggered 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 = RC_PROTO_UNKNOWN; |
|
ssize_t rc; |
|
u64 allowed; |
|
int i; |
|
|
|
mutex_lock(&dev->lock); |
|
if (!dev->registered) { |
|
mutex_unlock(&dev->lock); |
|
return -ENODEV; |
|
} |
|
|
|
allowed = dev->allowed_wakeup_protocols; |
|
|
|
if (!sysfs_streq(buf, "none")) { |
|
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); |
|
} |
|
|
|
static int rc_dev_uevent(struct device *device, struct kobj_uevent_env *env) |
|
{ |
|
struct rc_dev *dev = to_rc_dev(device); |
|
int ret = 0; |
|
|
|
mutex_lock(&dev->lock); |
|
|
|
if (!dev->registered) |
|
ret = -ENODEV; |
|
if (ret == 0 && dev->rc_map.name) |
|
ret = add_uevent_var(env, "NAME=%s", dev->rc_map.name); |
|
if (ret == 0 && dev->driver_name) |
|
ret = add_uevent_var(env, "DRV_NAME=%s", dev->driver_name); |
|
if (ret == 0 && dev->device_name) |
|
ret = add_uevent_var(env, "DEV_NAME=%s", dev->device_name); |
|
|
|
mutex_unlock(&dev->lock); |
|
|
|
return ret; |
|
} |
|
|
|
/* |
|
* 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; |
|
} |
|
|
|
/* Keyboard events */ |
|
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); |
|
|
|
/* Pointer/mouse events */ |
|
set_bit(INPUT_PROP_POINTING_STICK, dev->input_dev->propbit); |
|
set_bit(EV_REL, dev->input_dev->evbit); |
|
set_bit(REL_X, dev->input_dev->relbit); |
|
set_bit(REL_Y, dev->input_dev->relbit); |
|
|
|
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; |
|
} |
|
|
|
dev->registered = true; |
|
|
|
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); |
|
|
|
/* |
|
* once the input device is registered in rc_setup_rx_device, |
|
* userspace can open the input device and rc_open() will be called |
|
* as a result. This results in driver code being allowed to submit |
|
* keycodes with rc_keydown, so lirc must be registered first. |
|
*/ |
|
if (dev->allowed_protocols != RC_PROTO_BIT_CEC) { |
|
rc = lirc_register(dev); |
|
if (rc < 0) |
|
goto out_dev; |
|
} |
|
|
|
if (dev->driver_type != RC_DRIVER_IR_RAW_TX) { |
|
rc = rc_setup_rx_device(dev); |
|
if (rc) |
|
goto out_lirc; |
|
} |
|
|
|
if (dev->driver_type == RC_DRIVER_IR_RAW) { |
|
rc = ir_raw_event_register(dev); |
|
if (rc < 0) |
|
goto out_rx; |
|
} |
|
|
|
dev_dbg(&dev->dev, "Registered rc%u (driver: %s)\n", dev->minor, |
|
dev->driver_name ? dev->driver_name : "unknown"); |
|
|
|
return 0; |
|
|
|
out_rx: |
|
rc_free_rx_device(dev); |
|
out_lirc: |
|
if (dev->allowed_protocols != RC_PROTO_BIT_CEC) |
|
lirc_unregister(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); |
|
|
|
mutex_lock(&dev->lock); |
|
if (dev->users && dev->close) |
|
dev->close(dev); |
|
dev->registered = false; |
|
mutex_unlock(&dev->lock); |
|
|
|
rc_free_rx_device(dev); |
|
|
|
/* |
|
* lirc device should be freed with dev->registered = false, so |
|
* that userspace polling will get notified. |
|
*/ |
|
if (dev->allowed_protocols != RC_PROTO_BIT_CEC) |
|
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 rc; |
|
} |
|
|
|
led_trigger_register_simple("rc-feedback", &led_feedback); |
|
rc_map_register(&empty_map); |
|
#ifdef CONFIG_MEDIA_CEC_RC |
|
rc_map_register(&cec_map); |
|
#endif |
|
|
|
return 0; |
|
} |
|
|
|
static void __exit rc_core_exit(void) |
|
{ |
|
lirc_dev_exit(); |
|
class_unregister(&rc_class); |
|
led_trigger_unregister_simple(led_feedback); |
|
#ifdef CONFIG_MEDIA_CEC_RC |
|
rc_map_unregister(&cec_map); |
|
#endif |
|
rc_map_unregister(&empty_map); |
|
} |
|
|
|
subsys_initcall(rc_core_init); |
|
module_exit(rc_core_exit); |
|
|
|
MODULE_AUTHOR("Mauro Carvalho Chehab"); |
|
MODULE_LICENSE("GPL v2");
|
|
|