diff options
Diffstat (limited to 'drivers/media/rc/rc-main.c')
| -rw-r--r-- | drivers/media/rc/rc-main.c | 1582 |
1 files changed, 1236 insertions, 346 deletions
diff --git a/drivers/media/rc/rc-main.c b/drivers/media/rc/rc-main.c index 1cf382a0b277..b9bf5cdcde4a 100644 --- a/drivers/media/rc/rc-main.c +++ b/drivers/media/rc/rc-main.c @@ -1,22 +1,18 @@ -/* rc-main.c - Remote Controller core module - * - * Copyright (C) 2009-2010 by Mauro Carvalho Chehab <mchehab@redhat.com> - * - * This program is free software; you can redistribute it and/or modify - * it under the terms of the GNU General Public License as published by - * the Free Software Foundation version 2 of the License. - * - * This program is distributed in the hope that it will be useful, - * but WITHOUT ANY WARRANTY; without even the implied warranty of - * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - * GNU General Public License for more details. - */ +// 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" @@ -25,12 +21,71 @@ #define IR_TAB_MIN_SIZE 256 #define IR_TAB_MAX_SIZE 8192 -/* FIXME: IR_KEYPRESS_TIMEOUT should be protocol specific */ -#define IR_KEYPRESS_TIMEOUT 250 +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) { @@ -54,11 +109,11 @@ struct rc_map *rc_map_get(const char *name) struct rc_map_list *map; map = seek_rc_map(name); -#ifdef MODULE +#ifdef CONFIG_MODULES if (!map) { - int rc = request_module(name); + int rc = request_module("%s", name); if (rc < 0) { - printk(KERN_ERR "Couldn't load IR keymap %s\n", name); + pr_err("Couldn't load IR keymap %s\n", name); return NULL; } msleep(20); /* Give some time for IR to register */ @@ -67,7 +122,7 @@ struct rc_map *rc_map_get(const char *name) } #endif if (!map) { - printk(KERN_ERR "IR keymap %s not found\n", name); + pr_err("IR keymap %s not found\n", name); return NULL; } @@ -101,37 +156,79 @@ static struct rc_map_table empty[] = { static struct rc_map_list empty_map = { .map = { - .scan = empty, - .size = ARRAY_SIZE(empty), - .rc_type = RC_TYPE_UNKNOWN, /* Legacy IR type */ - .name = RC_MAP_EMPTY, + .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_type: ir type to assign to the new table + * @rc_proto: ir type to assign to the new table * @size: initial size of the table - * @return: zero on success or a negative error code * * 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_map *rc_map, - const char *name, u64 rc_type, size_t size) +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 = name; - rc_map->rc_type = rc_type; + 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) + if (!rc_map->scan) { + kfree(rc_map->name); + rc_map->name = NULL; return -ENOMEM; + } - IR_dprintk(1, "Allocated space for %u keycode entries (%u bytes)\n", - rc_map->size, rc_map->alloc); + dev_dbg(&dev->dev, "Allocated space for %u keycode entries (%u bytes)\n", + rc_map->size, rc_map->alloc); return 0; } @@ -145,20 +242,25 @@ static int ir_create_table(struct rc_map *rc_map, 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 - * @return: zero on success or a negative error code * * 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_map *rc_map, gfp_t gfp_flags) +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; @@ -171,23 +273,21 @@ static int ir_resize_table(struct rc_map *rc_map, gfp_t gfp_flags) return -ENOMEM; newalloc *= 2; - IR_dprintk(1, "Growing table to %u bytes\n", newalloc); + 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; - IR_dprintk(1, "Shrinking table to %u bytes\n", newalloc); + dev_dbg(&dev->dev, "Shrinking table to %u bytes\n", newalloc); } if (newalloc == oldalloc) return 0; newscan = kmalloc(newalloc, gfp_flags); - if (!newscan) { - IR_dprintk(1, "Failed to kmalloc %u bytes\n", newalloc); + if (!newscan) return -ENOMEM; - } memcpy(newscan, rc_map->scan, rc_map->len * sizeof(struct rc_map_table)); rc_map->scan = newscan; @@ -202,11 +302,13 @@ static int ir_resize_table(struct rc_map *rc_map, gfp_t gfp_flags) * @dev: the struct rc_dev device descriptor * @rc_map: scancode table to be adjusted * @index: index of the mapping that needs to be updated - * @keycode: the desired keycode - * @return: previous keycode assigned to the mapping + * @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, @@ -218,16 +320,16 @@ static unsigned int ir_update_mapping(struct rc_dev *dev, /* Did the user wish to remove the mapping? */ if (new_keycode == KEY_RESERVED || new_keycode == KEY_UNKNOWN) { - IR_dprintk(1, "#%d: Deleting scan 0x%04x\n", - index, rc_map->scan[index].scancode); + 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 { - IR_dprintk(1, "#%d: %s scan 0x%04x with key 0x%04x\n", - index, - old_keycode == KEY_RESERVED ? "New" : "Replacing", - rc_map->scan[index].scancode, new_keycode); + 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); } @@ -244,7 +346,7 @@ static unsigned int ir_update_mapping(struct rc_dev *dev, } /* Possibly shrink the keytable, failure is not a problem */ - ir_resize_table(rc_map, GFP_ATOMIC); + ir_resize_table(dev, rc_map, GFP_ATOMIC); } return old_keycode; @@ -257,17 +359,17 @@ static unsigned int ir_update_mapping(struct rc_dev *dev, * @scancode: the desired scancode * @resize: controls whether we allowed to resize the table to * accommodate not yet present scancodes - * @return: index of the mapping containing scancode in question - * or -1U in case of failure. * * 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) + u64 scancode, bool resize) { unsigned int i; @@ -279,8 +381,8 @@ static unsigned int ir_establish_scancode(struct rc_dev *dev, * IR tables from other remotes. So, we support specifying a mask to * indicate the valid bits of the scancodes. */ - if (dev->scanmask) - scancode &= dev->scanmask; + 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++) { @@ -294,7 +396,7 @@ static unsigned int ir_establish_scancode(struct rc_dev *dev, /* No previous mapping found, we might need to grow the table */ if (rc_map->size == rc_map->len) { - if (!resize || ir_resize_table(rc_map, GFP_ATOMIC)) + if (!resize || ir_resize_table(dev, rc_map, GFP_ATOMIC)) return -1U; } @@ -312,11 +414,12 @@ static unsigned int ir_establish_scancode(struct rc_dev *dev, /** * ir_setkeycode() - set a keycode in the scancode->keycode table * @idev: the struct input_dev device descriptor - * @scancode: the desired scancode - * @keycode: result - * @return: -EINVAL if the keycode could not be inserted, otherwise zero. + * @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, @@ -325,7 +428,7 @@ static int ir_setkeycode(struct input_dev *idev, struct rc_dev *rdev = input_get_drvdata(idev); struct rc_map *rc_map = &rdev->rc_map; unsigned int index; - unsigned int scancode; + u64 scancode; int retval = 0; unsigned long flags; @@ -338,7 +441,7 @@ static int ir_setkeycode(struct input_dev *idev, goto out; } } else { - retval = input_scancode_to_scalar(ke, &scancode); + retval = scancode_to_u64(ke, &scancode); if (retval) goto out; @@ -359,27 +462,23 @@ out: /** * ir_setkeytable() - sets several entries in the scancode->keycode table * @dev: the struct rc_dev device descriptor - * @to: the struct rc_map to copy entries to * @from: the struct rc_map to copy entries from - * @return: -ENOMEM if all keycodes could not be inserted, otherwise zero. * * 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) +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(rc_map, from->name, - from->rc_type, from->size); + rc = ir_create_table(dev, rc_map, from->name, from->rc_proto, + from->size); if (rc) return rc; - IR_dprintk(1, "Allocated space for %u keycode entries (%u bytes)\n", - rc_map->size, rc_map->alloc); - for (i = 0; i < from->size; i++) { index = ir_establish_scancode(dev, rc_map, from->scan[i].scancode, false); @@ -398,43 +497,49 @@ static int ir_setkeytable(struct rc_dev *dev, 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 - * @return: index in the table, -1U if not found * * 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) + u64 scancode) { - int start = 0; - int end = rc_map->len - 1; - int mid; - - while (start <= end) { - mid = (start + end) / 2; - if (rc_map->scan[mid].scancode < scancode) - start = mid + 1; - else if (rc_map->scan[mid].scancode > scancode) - end = mid - 1; - else - return mid; - } - - return -1U; + 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 - * @scancode: the desired scancode - * @keycode: used to return the keycode, if found, or KEY_RESERVED - * @return: always returns zero. + * @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) @@ -444,7 +549,7 @@ static int ir_getkeycode(struct input_dev *idev, struct rc_map_table *entry; unsigned long flags; unsigned int index; - unsigned int scancode; + u64 scancode; int retval; spin_lock_irqsave(&rc_map->lock, flags); @@ -452,7 +557,7 @@ static int ir_getkeycode(struct input_dev *idev, if (ke->flags & INPUT_KEYMAP_BY_INDEX) { index = ke->index; } else { - retval = input_scancode_to_scalar(ke, &scancode); + retval = scancode_to_u64(ke, &scancode); if (retval) goto out; @@ -466,7 +571,6 @@ static int ir_getkeycode(struct input_dev *idev, 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 @@ -491,13 +595,14 @@ out: * 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 - * @return: the corresponding keycode, or KEY_RESERVED * * 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) +u32 rc_g_keycode_from_table(struct rc_dev *dev, u64 scancode) { struct rc_map *rc_map = &dev->rc_map; unsigned int keycode; @@ -513,8 +618,8 @@ u32 rc_g_keycode_from_table(struct rc_dev *dev, u32 scancode) spin_unlock_irqrestore(&rc_map->lock, flags); if (keycode != KEY_RESERVED) - IR_dprintk(1, "%s: scancode 0x%04x keycode 0x%02x\n", - dev->input_name, scancode, keycode); + dev_dbg(&dev->dev, "%s: scancode 0x%04llx keycode 0x%02x\n", + dev->device_name, scancode, keycode); return keycode; } @@ -533,8 +638,10 @@ static void ir_do_keyup(struct rc_dev *dev, bool sync) if (!dev->keypressed) return; - IR_dprintk(1, "keyup key 0x%04x\n", dev->last_keycode); + dev_dbg(&dev->dev, "keyup key 0x%04x\n", dev->last_keycode); + timer_delete(&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; @@ -559,14 +666,15 @@ EXPORT_SYMBOL_GPL(rc_keyup); /** * ir_timer_keyup() - generates a keyup event after a timeout - * @cookie: a pointer to the struct rc_dev for the device + * + * @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(unsigned long cookie) +static void ir_timer_keyup(struct timer_list *t) { - struct rc_dev *dev = (struct rc_dev *)cookie; + struct rc_dev *dev = timer_container_of(dev, t, timer_keyup); unsigned long flags; /* @@ -586,6 +694,39 @@ static void ir_timer_keyup(unsigned long cookie) } /** + * 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 = timer_container_of(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 * @@ -596,19 +737,31 @@ static void ir_timer_keyup(unsigned long cookie) 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); - input_event(dev->input_dev, EV_MSC, MSC_SCAN, dev->last_scancode); - input_sync(dev->input_dev); - - if (!dev->keypressed) - goto out; + if (dev->last_scancode <= U32_MAX) { + input_event(dev->input_dev, EV_MSC, MSC_SCAN, + dev->last_scancode); + input_sync(dev->input_dev); + } - dev->keyup_jiffies = jiffies + msecs_to_jiffies(IR_KEYPRESS_TIMEOUT); - mod_timer(&dev->timer_keyup, dev->keyup_jiffies); + if (dev->keypressed) { + dev->keyup_jiffies = jiffies + timeout; + mod_timer(&dev->timer_keyup, dev->keyup_jiffies); + } -out: spin_unlock_irqrestore(&dev->keylock, flags); } EXPORT_SYMBOL_GPL(rc_repeat); @@ -616,6 +769,7 @@ 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 @@ -623,29 +777,59 @@ EXPORT_SYMBOL_GPL(rc_repeat); * 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, int scancode, - u32 keycode, u8 toggle) +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_scancode != scancode || - dev->last_toggle != 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) | + (!new_event ? LIRC_SCANCODE_FLAG_REPEAT : 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); - input_event(dev->input_dev, EV_MSC, MSC_SCAN, scancode); + 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->last_scancode = scancode; - dev->last_toggle = toggle; - dev->last_keycode = keycode; - IR_dprintk(1, "%s: key down event, " - "key 0x%04x, scancode 0x%04x\n", - dev->input_name, keycode, scancode); + 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); @@ -654,23 +838,26 @@ static void ir_do_keydown(struct rc_dev *dev, int scancode, /** * rc_keydown() - generates input event for a key press * @dev: the struct rc_dev descriptor of the device - * @scancode: the scancode that we're seeking + * @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, int scancode, u8 toggle) +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, scancode, keycode, toggle); + ir_do_keydown(dev, protocol, scancode, keycode, toggle); if (dev->keypressed) { - dev->keyup_jiffies = jiffies + msecs_to_jiffies(IR_KEYPRESS_TIMEOUT); + 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); @@ -681,41 +868,156 @@ 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 - * @scancode: the scancode that we're seeking + * @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, int scancode, u8 toggle) +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, scancode, keycode, toggle); + 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 rdev->open(rdev); + 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); - - if (rdev) - rdev->close(rdev); + rc_close(rdev); } /* class for /sys/class/rc */ -static char *rc_devnode(struct device *dev, umode_t *mode) +static char *rc_devnode(const struct device *dev, umode_t *mode) { return kasprintf(GFP_KERNEL, "rc/%s", dev_name(dev)); } @@ -730,44 +1032,75 @@ static struct class rc_class = { * used by the sysfs protocols file. Note that the order * of the entries is relevant. */ -static struct { +static const struct { u64 type; - char *name; + const char *name; + const char *module_name; } proto_names[] = { - { RC_BIT_NONE, "none" }, - { RC_BIT_OTHER, "other" }, - { RC_BIT_UNKNOWN, "unknown" }, - { RC_BIT_RC5 | - RC_BIT_RC5X, "rc-5" }, - { RC_BIT_NEC, "nec" }, - { RC_BIT_RC6_0 | - RC_BIT_RC6_6A_20 | - RC_BIT_RC6_6A_24 | - RC_BIT_RC6_6A_32 | - RC_BIT_RC6_MCE, "rc-6" }, - { RC_BIT_JVC, "jvc" }, - { RC_BIT_SONY12 | - RC_BIT_SONY15 | - RC_BIT_SONY20, "sony" }, - { RC_BIT_RC5_SZ, "rc-5-sz" }, - { RC_BIT_SANYO, "sanyo" }, - { RC_BIT_MCE_KBD, "mce_kbd" }, - { RC_BIT_LIRC, "lirc" }, + { 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 (unused) + * @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 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 device - * registration, store_protocols and show_protocols. + * 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) @@ -777,25 +1110,17 @@ static ssize_t show_protocols(struct device *device, char *tmp = buf; int i; - /* Device is being removed */ - if (!dev) - return -EINVAL; - mutex_lock(&dev->lock); enabled = dev->enabled_protocols; - if (dev->driver_type == RC_DRIVER_SCANCODE) - allowed = dev->allowed_protos; - else if (dev->raw) + allowed = dev->allowed_protocols; + if (dev->raw && !allowed) allowed = ir_raw_get_allowed_protocols(); - else { - mutex_unlock(&dev->lock); - return -ENODEV; - } - IR_dprintk(1, "allowed - 0x%llx, enabled - 0x%llx\n", - (long long)allowed, - (long long)enabled); + 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) @@ -807,61 +1132,40 @@ static ssize_t show_protocols(struct device *device, 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'; - mutex_unlock(&dev->lock); - return tmp + 1 - buf; } /** - * store_protocols() - changes the current IR protocol(s) - * @device: the device descriptor - * @mattr: the device attribute struct (unused) - * @buf: a pointer to the input buffer - * @len: length of the input buffer + * 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 * - * This routine is for changing the IR protocol type. - * It is trigged by writing to /sys/class/rc/rc?/protocols. - * Writing "+proto" will add a protocol to the list of enabled protocols. - * Writing "-proto" will remove a protocol from the list of enabled protocols. + * 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 -EINVAL if an invalid protocol combination or unknown protocol name - * is used, otherwise @len. - * - * dev->lock is taken to guard against races between device - * registration, store_protocols and show_protocols. + * Returns the number of changes performed or a negative error code. */ -static ssize_t store_protocols(struct device *device, - struct device_attribute *mattr, - const char *data, - size_t len) +static int parse_protocol_change(struct rc_dev *dev, u64 *protocols, + const char *buf) { - struct rc_dev *dev = to_rc_dev(device); - bool enable, disable; const char *tmp; - u64 type; + unsigned count = 0; + bool enable, disable; u64 mask; - int rc, i, count = 0; - ssize_t ret; - - /* Device is being removed */ - if (!dev) - return -EINVAL; - - mutex_lock(&dev->lock); - - if (dev->driver_type != RC_DRIVER_SCANCODE && !dev->raw) { - IR_dprintk(1, "Protocol switching not supported\n"); - ret = -EINVAL; - goto out; - } - type = dev->enabled_protocols; + int i; - while ((tmp = strsep((char **) &data, " \n")) != NULL) { + while ((tmp = strsep((char **)&buf, " \n")) != NULL) { if (!*tmp) break; @@ -886,101 +1190,514 @@ static ssize_t store_protocols(struct device *device, } if (i == ARRAY_SIZE(proto_names)) { - IR_dprintk(1, "Unknown protocol: '%s'\n", tmp); - ret = -EINVAL; - goto out; + if (!strcasecmp(tmp, "lirc")) + mask = 0; + else { + dev_dbg(&dev->dev, "Unknown protocol: '%s'\n", + tmp); + return -EINVAL; + } } count++; if (enable) - type |= mask; + *protocols |= mask; else if (disable) - type &= ~mask; + *protocols &= ~mask; else - type = mask; + *protocols = mask; } if (!count) { - IR_dprintk(1, "Protocol not specified\n"); - ret = -EINVAL; + 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 (dev->change_protocol) { - rc = dev->change_protocol(dev, &type); + 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) { - IR_dprintk(1, "Error setting protocols to 0x%llx\n", - (long long)type); + 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; + } + } } - dev->enabled_protocols = type; - IR_dprintk(1, "Current protocol(s): 0x%llx\n", - (long long)type); + 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; - ret = len; + rc = dev->s_wakeup_filter(dev, &dev->scancode_wakeup_filter); + if (rc == 0) + rc = len; + } else { + rc = len; + } out: mutex_unlock(&dev->lock); - return ret; + return rc; } static void rc_dev_release(struct device *device) { -} + struct rc_dev *dev = to_rc_dev(device); -#define ADD_HOTPLUG_VAR(fmt, val...) \ - do { \ - int err = add_uevent_var(env, fmt, val); \ - if (err) \ - return err; \ - } while (0) + kfree(dev); +} -static int rc_dev_uevent(struct device *device, struct kobj_uevent_env *env) +static int rc_dev_uevent(const struct device *device, struct kobj_uevent_env *env) { struct rc_dev *dev = to_rc_dev(device); + int ret = 0; - if (!dev || !dev->input_dev) - return -ENODEV; + mutex_lock(&dev->lock); - 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->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); - return 0; + mutex_unlock(&dev->lock); + + return ret; } /* * Static device attribute struct with the sysfs attributes for IR's */ -static DEVICE_ATTR(protocols, S_IRUGO | S_IWUSR, - show_protocols, store_protocols); +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_attrs[] = { - &dev_attr_protocols.attr, +static struct attribute *rc_dev_filter_attrs[] = { + &dev_attr_filter.attr.attr, + &dev_attr_filter_mask.attr.attr, NULL, }; -static struct attribute_group rc_dev_attr_grp = { - .attrs = rc_dev_attrs, +static const struct attribute_group rc_dev_filter_attr_grp = { + .attrs = rc_dev_filter_attrs, }; -static const struct attribute_group *rc_dev_attr_groups[] = { - &rc_dev_attr_grp, - NULL +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 struct device_type rc_dev_type = { - .groups = rc_dev_attr_groups, +static const struct device_type rc_dev_type = { .release = rc_dev_release, .uevent = rc_dev_uevent, }; -struct rc_dev *rc_allocate_device(void) +struct rc_dev *rc_allocate_device(enum rc_driver_type type) { struct rc_dev *dev; @@ -988,25 +1705,32 @@ struct rc_dev *rc_allocate_device(void) if (!dev) return NULL; - dev->input_dev = input_allocate_device(); - if (!dev->input_dev) { - kfree(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->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); + spin_lock_init(&dev->rc_map.lock); + spin_lock_init(&dev->keylock); + } mutex_init(&dev->lock); - setup_timer(&dev->timer_keyup, ir_timer_keyup, (unsigned long)dev); 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; } @@ -1017,25 +1741,53 @@ void rc_free_device(struct rc_dev *dev) if (!dev) return; - if (dev->input_dev) - input_free_device(dev->input_dev); + input_free_device(dev->input_dev); put_device(&dev->dev); - kfree(dev); + /* kfree(dev) will be called by the callback function + rc_dev_release() */ + module_put(THIS_MODULE); } EXPORT_SYMBOL_GPL(rc_free_device); -int rc_register_device(struct rc_dev *dev) +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) { - static bool raw_init = false; /* raw decoders loaded? */ - static atomic_t devno = ATOMIC_INIT(0); - struct rc_map *rc_map; - const char *path; int rc; + struct rc_map *rc_map; + u64 rc_proto; - if (!dev || !dev->map_name) + if (!dev->map_name) return -EINVAL; rc_map = rc_map_get(dev->map_name); @@ -1044,41 +1796,63 @@ int rc_register_device(struct rc_dev *dev) 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; - /* - * Take the lock here, as the device sysfs node will appear - * when device_add() is called, which may trigger an ir-keytable udev - * rule, which will in turn call show_protocols and access - * dev->enabled_protocols before it has been initialized. - */ - mutex_lock(&dev->lock); - - dev->devno = (unsigned long)(atomic_inc_return(&devno) - 1); - dev_set_name(&dev->dev, "rc%ld", dev->devno); - dev_set_drvdata(&dev->dev, dev); - rc = device_add(&dev->dev); - if (rc) - goto out_unlock; - - rc = ir_setkeytable(dev, rc_map); - if (rc) - goto out_dev; - 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->input_name; + 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) - goto out_table; + return rc; /* * Default delay of 250ms is too short for some protocols, especially @@ -1086,7 +1860,10 @@ int rc_register_device(struct rc_dev *dev) * to avoid wrong repetition of the keycodes. Note that this must be * set after the call to input_register_device(). */ - dev->input_dev->rep[REP_DELAY] = 500; + 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 @@ -1095,79 +1872,179 @@ int rc_register_device(struct rc_dev *dev) */ dev->input_dev->rep[REP_PERIOD] = 125; - path = kobject_get_path(&dev->dev.kobj, GFP_KERNEL); - printk(KERN_INFO "%s: %s as %s\n", - dev_name(&dev->dev), - dev->input_name ? dev->input_name : "Unspecified device", - path ? path : "N/A"); - kfree(path); + 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_alloc_max(&rc_ida, RC_DEV_MAX - 1, 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) { - /* Load raw decoders, if they aren't already */ - if (!raw_init) { - IR_dprintk(1, "Loading raw decoders\n"); - ir_raw_init(); - raw_init = true; - } - rc = ir_raw_event_register(dev); + rc = ir_raw_event_prepare(dev); if (rc < 0) - goto out_input; + goto out_minor; } - if (dev->change_protocol) { - u64 rc_type = (1 << rc_map->rc_type); - rc = dev->change_protocol(dev, &rc_type); - if (rc < 0) + if (dev->driver_type != RC_DRIVER_IR_RAW_TX) { + rc = rc_prepare_rx_device(dev); + if (rc) goto out_raw; - dev->enabled_protocols = rc_type; } - mutex_unlock(&dev->lock); + 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; + } - IR_dprintk(1, "Registered rc%ld (driver: %s, remote: %s, mode %s)\n", - dev->devno, - dev->driver_name ? dev->driver_name : "unknown", - rc_map->name ? rc_map->name : "unknown", - dev->driver_type == RC_DRIVER_IR_RAW ? "raw" : "cooked"); + dev_dbg(&dev->dev, "Registered rc%u (driver: %s)\n", dev->minor, + dev->driver_name ? dev->driver_name : "unknown"); return 0; -out_raw: - if (dev->driver_type == RC_DRIVER_IR_RAW) - ir_raw_event_unregister(dev); -out_input: - input_unregister_device(dev->input_dev); - dev->input_dev = NULL; -out_table: - ir_free_table(&dev->rc_map); +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_unlock: - mutex_unlock(&dev->lock); +out_rx_free: + ir_free_table(&dev->rc_map); +out_raw: + ir_raw_event_free(dev); +out_minor: + ida_free(&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; - del_timer_sync(&dev->timer_keyup); - if (dev->driver_type == RC_DRIVER_IR_RAW) ir_raw_event_unregister(dev); - /* Freeing the table should also call the stop callback */ - ir_free_table(&dev->rc_map); - IR_dprintk(1, "Freed keycode table\n"); + timer_delete_sync(&dev->timer_keyup); + timer_delete_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); - input_unregister_device(dev->input_dev); - dev->input_dev = NULL; + /* + * 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); - rc_free_device(dev); + ida_free(&rc_ida, dev->minor); + + if (!dev->managed_alloc) + rc_free_device(dev); } EXPORT_SYMBOL_GPL(rc_unregister_device); @@ -1180,27 +2057,40 @@ static int __init rc_core_init(void) { int rc = class_register(&rc_class); if (rc) { - printk(KERN_ERR "rc_core: unable to register rc class\n"); + 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); -int rc_core_debug; /* ir_debug level (0,1,2) */ -EXPORT_SYMBOL_GPL(rc_core_debug); -module_param_named(debug, rc_core_debug, int, 0644); - -MODULE_AUTHOR("Mauro Carvalho Chehab <mchehab@redhat.com>"); -MODULE_LICENSE("GPL"); +MODULE_AUTHOR("Mauro Carvalho Chehab"); +MODULE_DESCRIPTION("Remote Controller core module"); +MODULE_LICENSE("GPL v2"); |