David Härdeman | 829ba9f | 2010-11-19 20:43:27 -0300 | [diff] [blame] | 1 | /* ir-raw.c - handle IR pulse/space events |
Mauro Carvalho Chehab | a3572c3 | 2010-03-20 20:59:44 -0300 | [diff] [blame] | 2 | * |
| 3 | * Copyright (C) 2010 by Mauro Carvalho Chehab <mchehab@redhat.com> |
| 4 | * |
| 5 | * This program is free software; you can redistribute it and/or modify |
| 6 | * it under the terms of the GNU General Public License as published by |
| 7 | * the Free Software Foundation version 2 of the License. |
| 8 | * |
| 9 | * This program is distributed in the hope that it will be useful, |
| 10 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 11 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 12 | * GNU General Public License for more details. |
| 13 | */ |
| 14 | |
Maxim Levitsky | 0d2cb1d | 2010-07-31 11:59:17 -0300 | [diff] [blame] | 15 | #include <linux/kthread.h> |
Maxim Levitsky | 45a568f | 2010-07-31 11:59:16 -0300 | [diff] [blame] | 16 | #include <linux/mutex.h> |
David Härdeman | 724e249 | 2010-04-08 13:10:00 -0300 | [diff] [blame] | 17 | #include <linux/sched.h> |
Maxim Levitsky | 0d2cb1d | 2010-07-31 11:59:17 -0300 | [diff] [blame] | 18 | #include <linux/freezer.h> |
Mauro Carvalho Chehab | f62de67 | 2010-11-09 23:09:57 -0300 | [diff] [blame] | 19 | #include "rc-core-priv.h" |
Mauro Carvalho Chehab | a3572c3 | 2010-03-20 20:59:44 -0300 | [diff] [blame] | 20 | |
David Härdeman | 724e249 | 2010-04-08 13:10:00 -0300 | [diff] [blame] | 21 | /* Define the max number of pulse/space transitions to buffer */ |
| 22 | #define MAX_IR_EVENT_SIZE 512 |
Mauro Carvalho Chehab | a3572c3 | 2010-03-20 20:59:44 -0300 | [diff] [blame] | 23 | |
David Härdeman | c216369 | 2010-06-13 17:29:36 -0300 | [diff] [blame] | 24 | /* Used to keep track of IR raw clients, protected by ir_raw_handler_lock */ |
| 25 | static LIST_HEAD(ir_raw_client_list); |
| 26 | |
Mauro Carvalho Chehab | 995187b | 2010-03-24 20:47:53 -0300 | [diff] [blame] | 27 | /* Used to handle IR raw handler extensions */ |
Maxim Levitsky | 45a568f | 2010-07-31 11:59:16 -0300 | [diff] [blame] | 28 | static DEFINE_MUTEX(ir_raw_handler_lock); |
David Härdeman | 667c9eb | 2010-06-13 17:29:31 -0300 | [diff] [blame] | 29 | static LIST_HEAD(ir_raw_handler_list); |
| 30 | static u64 available_protocols; |
Mauro Carvalho Chehab | 93c312f | 2010-03-25 21:13:43 -0300 | [diff] [blame] | 31 | |
Mauro Carvalho Chehab | 5fa2989 | 2010-04-08 19:04:06 -0300 | [diff] [blame] | 32 | #ifdef MODULE |
Mauro Carvalho Chehab | 995187b | 2010-03-24 20:47:53 -0300 | [diff] [blame] | 33 | /* Used to load the decoders */ |
| 34 | static struct work_struct wq_load; |
Mauro Carvalho Chehab | 5fa2989 | 2010-04-08 19:04:06 -0300 | [diff] [blame] | 35 | #endif |
Mauro Carvalho Chehab | 995187b | 2010-03-24 20:47:53 -0300 | [diff] [blame] | 36 | |
Maxim Levitsky | 0d2cb1d | 2010-07-31 11:59:17 -0300 | [diff] [blame] | 37 | static int ir_raw_event_thread(void *data) |
David Härdeman | 724e249 | 2010-04-08 13:10:00 -0300 | [diff] [blame] | 38 | { |
David Härdeman | e40b112 | 2010-04-15 18:46:00 -0300 | [diff] [blame] | 39 | struct ir_raw_event ev; |
David Härdeman | c216369 | 2010-06-13 17:29:36 -0300 | [diff] [blame] | 40 | struct ir_raw_handler *handler; |
Maxim Levitsky | 0d2cb1d | 2010-07-31 11:59:17 -0300 | [diff] [blame] | 41 | struct ir_raw_event_ctrl *raw = (struct ir_raw_event_ctrl *)data; |
Maxim Levitsky | c6ef1e7 | 2010-09-06 18:26:06 -0300 | [diff] [blame] | 42 | int retval; |
David Härdeman | 724e249 | 2010-04-08 13:10:00 -0300 | [diff] [blame] | 43 | |
Maxim Levitsky | 0d2cb1d | 2010-07-31 11:59:17 -0300 | [diff] [blame] | 44 | while (!kthread_should_stop()) { |
Maxim Levitsky | 0d2cb1d | 2010-07-31 11:59:17 -0300 | [diff] [blame] | 45 | |
Maxim Levitsky | c6ef1e7 | 2010-09-06 18:26:06 -0300 | [diff] [blame] | 46 | spin_lock_irq(&raw->lock); |
| 47 | retval = kfifo_out(&raw->kfifo, &ev, sizeof(ev)); |
Maxim Levitsky | 0d2cb1d | 2010-07-31 11:59:17 -0300 | [diff] [blame] | 48 | |
Maxim Levitsky | c6ef1e7 | 2010-09-06 18:26:06 -0300 | [diff] [blame] | 49 | if (!retval) { |
| 50 | set_current_state(TASK_INTERRUPTIBLE); |
| 51 | |
| 52 | if (kthread_should_stop()) |
| 53 | set_current_state(TASK_RUNNING); |
| 54 | |
| 55 | spin_unlock_irq(&raw->lock); |
| 56 | schedule(); |
| 57 | continue; |
Maxim Levitsky | 0d2cb1d | 2010-07-31 11:59:17 -0300 | [diff] [blame] | 58 | } |
| 59 | |
Maxim Levitsky | c6ef1e7 | 2010-09-06 18:26:06 -0300 | [diff] [blame] | 60 | spin_unlock_irq(&raw->lock); |
Maxim Levitsky | 0d2cb1d | 2010-07-31 11:59:17 -0300 | [diff] [blame] | 61 | |
Maxim Levitsky | c6ef1e7 | 2010-09-06 18:26:06 -0300 | [diff] [blame] | 62 | |
| 63 | BUG_ON(retval != sizeof(ev)); |
| 64 | |
| 65 | mutex_lock(&ir_raw_handler_lock); |
| 66 | list_for_each_entry(handler, &ir_raw_handler_list, list) |
David Härdeman | d8b4b58 | 2010-10-29 16:08:23 -0300 | [diff] [blame] | 67 | handler->decode(raw->dev, ev); |
Maxim Levitsky | c6ef1e7 | 2010-09-06 18:26:06 -0300 | [diff] [blame] | 68 | raw->prev_ev = ev; |
| 69 | mutex_unlock(&ir_raw_handler_lock); |
David Härdeman | c216369 | 2010-06-13 17:29:36 -0300 | [diff] [blame] | 70 | } |
Maxim Levitsky | 0d2cb1d | 2010-07-31 11:59:17 -0300 | [diff] [blame] | 71 | |
| 72 | return 0; |
David Härdeman | 724e249 | 2010-04-08 13:10:00 -0300 | [diff] [blame] | 73 | } |
| 74 | |
David Härdeman | 724e249 | 2010-04-08 13:10:00 -0300 | [diff] [blame] | 75 | /** |
| 76 | * ir_raw_event_store() - pass a pulse/space duration to the raw ir decoders |
David Härdeman | d8b4b58 | 2010-10-29 16:08:23 -0300 | [diff] [blame] | 77 | * @dev: the struct rc_dev device descriptor |
David Härdeman | e40b112 | 2010-04-15 18:46:00 -0300 | [diff] [blame] | 78 | * @ev: the struct ir_raw_event descriptor of the pulse/space |
David Härdeman | 724e249 | 2010-04-08 13:10:00 -0300 | [diff] [blame] | 79 | * |
| 80 | * This routine (which may be called from an interrupt context) stores a |
| 81 | * pulse/space duration for the raw ir decoding state machines. Pulses are |
| 82 | * signalled as positive values and spaces as negative values. A zero value |
| 83 | * will reset the decoding state machines. |
| 84 | */ |
David Härdeman | d8b4b58 | 2010-10-29 16:08:23 -0300 | [diff] [blame] | 85 | int ir_raw_event_store(struct rc_dev *dev, struct ir_raw_event *ev) |
Mauro Carvalho Chehab | a3572c3 | 2010-03-20 20:59:44 -0300 | [diff] [blame] | 86 | { |
David Härdeman | d8b4b58 | 2010-10-29 16:08:23 -0300 | [diff] [blame] | 87 | if (!dev->raw) |
Mauro Carvalho Chehab | a3572c3 | 2010-03-20 20:59:44 -0300 | [diff] [blame] | 88 | return -EINVAL; |
| 89 | |
Mauro Carvalho Chehab | 74c4792 | 2010-10-20 11:56:50 -0300 | [diff] [blame] | 90 | IR_dprintk(2, "sample: (%05dus %s)\n", |
David Härdeman | d8b4b58 | 2010-10-29 16:08:23 -0300 | [diff] [blame] | 91 | TO_US(ev->duration), TO_STR(ev->pulse)); |
Maxim Levitsky | 510fcb7 | 2010-07-31 11:59:15 -0300 | [diff] [blame] | 92 | |
David Härdeman | d8b4b58 | 2010-10-29 16:08:23 -0300 | [diff] [blame] | 93 | if (kfifo_in(&dev->raw->kfifo, ev, sizeof(*ev)) != sizeof(*ev)) |
David Härdeman | 724e249 | 2010-04-08 13:10:00 -0300 | [diff] [blame] | 94 | return -ENOMEM; |
Mauro Carvalho Chehab | a3572c3 | 2010-03-20 20:59:44 -0300 | [diff] [blame] | 95 | |
David Härdeman | 724e249 | 2010-04-08 13:10:00 -0300 | [diff] [blame] | 96 | return 0; |
Mauro Carvalho Chehab | a3572c3 | 2010-03-20 20:59:44 -0300 | [diff] [blame] | 97 | } |
| 98 | EXPORT_SYMBOL_GPL(ir_raw_event_store); |
| 99 | |
David Härdeman | 724e249 | 2010-04-08 13:10:00 -0300 | [diff] [blame] | 100 | /** |
| 101 | * ir_raw_event_store_edge() - notify raw ir decoders of the start of a pulse/space |
David Härdeman | d8b4b58 | 2010-10-29 16:08:23 -0300 | [diff] [blame] | 102 | * @dev: the struct rc_dev device descriptor |
David Härdeman | 724e249 | 2010-04-08 13:10:00 -0300 | [diff] [blame] | 103 | * @type: the type of the event that has occurred |
| 104 | * |
| 105 | * This routine (which may be called from an interrupt context) is used to |
| 106 | * store the beginning of an ir pulse or space (or the start/end of ir |
| 107 | * reception) for the raw ir decoding state machines. This is used by |
| 108 | * hardware which does not provide durations directly but only interrupts |
| 109 | * (or similar events) on state change. |
| 110 | */ |
David Härdeman | d8b4b58 | 2010-10-29 16:08:23 -0300 | [diff] [blame] | 111 | int ir_raw_event_store_edge(struct rc_dev *dev, enum raw_event_type type) |
Mauro Carvalho Chehab | a3572c3 | 2010-03-20 20:59:44 -0300 | [diff] [blame] | 112 | { |
David Härdeman | 724e249 | 2010-04-08 13:10:00 -0300 | [diff] [blame] | 113 | ktime_t now; |
| 114 | s64 delta; /* ns */ |
David Härdeman | e40b112 | 2010-04-15 18:46:00 -0300 | [diff] [blame] | 115 | struct ir_raw_event ev; |
David Härdeman | 724e249 | 2010-04-08 13:10:00 -0300 | [diff] [blame] | 116 | int rc = 0; |
Mauro Carvalho Chehab | a3572c3 | 2010-03-20 20:59:44 -0300 | [diff] [blame] | 117 | |
David Härdeman | d8b4b58 | 2010-10-29 16:08:23 -0300 | [diff] [blame] | 118 | if (!dev->raw) |
David Härdeman | 724e249 | 2010-04-08 13:10:00 -0300 | [diff] [blame] | 119 | return -EINVAL; |
| 120 | |
| 121 | now = ktime_get(); |
David Härdeman | d8b4b58 | 2010-10-29 16:08:23 -0300 | [diff] [blame] | 122 | delta = ktime_to_ns(ktime_sub(now, dev->raw->last_event)); |
David Härdeman | 724e249 | 2010-04-08 13:10:00 -0300 | [diff] [blame] | 123 | |
| 124 | /* Check for a long duration since last event or if we're |
| 125 | * being called for the first time, note that delta can't |
| 126 | * possibly be negative. |
Mauro Carvalho Chehab | a3572c3 | 2010-03-20 20:59:44 -0300 | [diff] [blame] | 127 | */ |
David Härdeman | e40b112 | 2010-04-15 18:46:00 -0300 | [diff] [blame] | 128 | ev.duration = 0; |
David Härdeman | d8b4b58 | 2010-10-29 16:08:23 -0300 | [diff] [blame] | 129 | if (delta > IR_MAX_DURATION || !dev->raw->last_type) |
David Härdeman | 724e249 | 2010-04-08 13:10:00 -0300 | [diff] [blame] | 130 | type |= IR_START_EVENT; |
David Härdeman | e40b112 | 2010-04-15 18:46:00 -0300 | [diff] [blame] | 131 | else |
| 132 | ev.duration = delta; |
David Härdeman | 724e249 | 2010-04-08 13:10:00 -0300 | [diff] [blame] | 133 | |
| 134 | if (type & IR_START_EVENT) |
David Härdeman | d8b4b58 | 2010-10-29 16:08:23 -0300 | [diff] [blame] | 135 | ir_raw_event_reset(dev); |
| 136 | else if (dev->raw->last_type & IR_SPACE) { |
David Härdeman | e40b112 | 2010-04-15 18:46:00 -0300 | [diff] [blame] | 137 | ev.pulse = false; |
David Härdeman | d8b4b58 | 2010-10-29 16:08:23 -0300 | [diff] [blame] | 138 | rc = ir_raw_event_store(dev, &ev); |
| 139 | } else if (dev->raw->last_type & IR_PULSE) { |
David Härdeman | e40b112 | 2010-04-15 18:46:00 -0300 | [diff] [blame] | 140 | ev.pulse = true; |
David Härdeman | d8b4b58 | 2010-10-29 16:08:23 -0300 | [diff] [blame] | 141 | rc = ir_raw_event_store(dev, &ev); |
David Härdeman | e40b112 | 2010-04-15 18:46:00 -0300 | [diff] [blame] | 142 | } else |
Mauro Carvalho Chehab | a3572c3 | 2010-03-20 20:59:44 -0300 | [diff] [blame] | 143 | return 0; |
Mauro Carvalho Chehab | a3572c3 | 2010-03-20 20:59:44 -0300 | [diff] [blame] | 144 | |
David Härdeman | d8b4b58 | 2010-10-29 16:08:23 -0300 | [diff] [blame] | 145 | dev->raw->last_event = now; |
| 146 | dev->raw->last_type = type; |
Mauro Carvalho Chehab | a3572c3 | 2010-03-20 20:59:44 -0300 | [diff] [blame] | 147 | return rc; |
| 148 | } |
David Härdeman | 724e249 | 2010-04-08 13:10:00 -0300 | [diff] [blame] | 149 | EXPORT_SYMBOL_GPL(ir_raw_event_store_edge); |
| 150 | |
| 151 | /** |
Maxim Levitsky | 4a702eb | 2010-07-31 11:59:22 -0300 | [diff] [blame] | 152 | * ir_raw_event_store_with_filter() - pass next pulse/space to decoders with some processing |
David Härdeman | d8b4b58 | 2010-10-29 16:08:23 -0300 | [diff] [blame] | 153 | * @dev: the struct rc_dev device descriptor |
Maxim Levitsky | 4a702eb | 2010-07-31 11:59:22 -0300 | [diff] [blame] | 154 | * @type: the type of the event that has occurred |
| 155 | * |
| 156 | * This routine (which may be called from an interrupt context) works |
| 157 | * in similiar manner to ir_raw_event_store_edge. |
| 158 | * This routine is intended for devices with limited internal buffer |
| 159 | * It automerges samples of same type, and handles timeouts |
| 160 | */ |
David Härdeman | d8b4b58 | 2010-10-29 16:08:23 -0300 | [diff] [blame] | 161 | int ir_raw_event_store_with_filter(struct rc_dev *dev, struct ir_raw_event *ev) |
Maxim Levitsky | 4a702eb | 2010-07-31 11:59:22 -0300 | [diff] [blame] | 162 | { |
David Härdeman | d8b4b58 | 2010-10-29 16:08:23 -0300 | [diff] [blame] | 163 | if (!dev->raw) |
Maxim Levitsky | 4a702eb | 2010-07-31 11:59:22 -0300 | [diff] [blame] | 164 | return -EINVAL; |
| 165 | |
| 166 | /* Ignore spaces in idle mode */ |
David Härdeman | d8b4b58 | 2010-10-29 16:08:23 -0300 | [diff] [blame] | 167 | if (dev->idle && !ev->pulse) |
Maxim Levitsky | 4a702eb | 2010-07-31 11:59:22 -0300 | [diff] [blame] | 168 | return 0; |
David Härdeman | d8b4b58 | 2010-10-29 16:08:23 -0300 | [diff] [blame] | 169 | else if (dev->idle) |
| 170 | ir_raw_event_set_idle(dev, false); |
Maxim Levitsky | 4a702eb | 2010-07-31 11:59:22 -0300 | [diff] [blame] | 171 | |
David Härdeman | d8b4b58 | 2010-10-29 16:08:23 -0300 | [diff] [blame] | 172 | if (!dev->raw->this_ev.duration) |
| 173 | dev->raw->this_ev = *ev; |
| 174 | else if (ev->pulse == dev->raw->this_ev.pulse) |
| 175 | dev->raw->this_ev.duration += ev->duration; |
| 176 | else { |
| 177 | ir_raw_event_store(dev, &dev->raw->this_ev); |
| 178 | dev->raw->this_ev = *ev; |
Maxim Levitsky | 4a702eb | 2010-07-31 11:59:22 -0300 | [diff] [blame] | 179 | } |
| 180 | |
| 181 | /* Enter idle mode if nessesary */ |
David Härdeman | d8b4b58 | 2010-10-29 16:08:23 -0300 | [diff] [blame] | 182 | if (!ev->pulse && dev->timeout && |
| 183 | dev->raw->this_ev.duration >= dev->timeout) |
| 184 | ir_raw_event_set_idle(dev, true); |
| 185 | |
Maxim Levitsky | 4a702eb | 2010-07-31 11:59:22 -0300 | [diff] [blame] | 186 | return 0; |
| 187 | } |
| 188 | EXPORT_SYMBOL_GPL(ir_raw_event_store_with_filter); |
| 189 | |
Maxim Levitsky | 4651918 | 2010-10-16 19:56:28 -0300 | [diff] [blame] | 190 | /** |
David Härdeman | d8b4b58 | 2010-10-29 16:08:23 -0300 | [diff] [blame] | 191 | * ir_raw_event_set_idle() - provide hint to rc-core when the device is idle or not |
| 192 | * @dev: the struct rc_dev device descriptor |
| 193 | * @idle: whether the device is idle or not |
Maxim Levitsky | 4651918 | 2010-10-16 19:56:28 -0300 | [diff] [blame] | 194 | */ |
David Härdeman | d8b4b58 | 2010-10-29 16:08:23 -0300 | [diff] [blame] | 195 | void ir_raw_event_set_idle(struct rc_dev *dev, bool idle) |
Maxim Levitsky | 4a702eb | 2010-07-31 11:59:22 -0300 | [diff] [blame] | 196 | { |
David Härdeman | d8b4b58 | 2010-10-29 16:08:23 -0300 | [diff] [blame] | 197 | if (!dev->raw) |
Maxim Levitsky | 4a702eb | 2010-07-31 11:59:22 -0300 | [diff] [blame] | 198 | return; |
| 199 | |
Maxim Levitsky | 4651918 | 2010-10-16 19:56:28 -0300 | [diff] [blame] | 200 | IR_dprintk(2, "%s idle mode\n", idle ? "enter" : "leave"); |
Maxim Levitsky | 4a702eb | 2010-07-31 11:59:22 -0300 | [diff] [blame] | 201 | |
| 202 | if (idle) { |
David Härdeman | d8b4b58 | 2010-10-29 16:08:23 -0300 | [diff] [blame] | 203 | dev->raw->this_ev.timeout = true; |
| 204 | ir_raw_event_store(dev, &dev->raw->this_ev); |
| 205 | init_ir_raw_event(&dev->raw->this_ev); |
Maxim Levitsky | 4a702eb | 2010-07-31 11:59:22 -0300 | [diff] [blame] | 206 | } |
Maxim Levitsky | 4651918 | 2010-10-16 19:56:28 -0300 | [diff] [blame] | 207 | |
David Härdeman | d8b4b58 | 2010-10-29 16:08:23 -0300 | [diff] [blame] | 208 | if (dev->s_idle) |
| 209 | dev->s_idle(dev, idle); |
| 210 | |
| 211 | dev->idle = idle; |
Maxim Levitsky | 4a702eb | 2010-07-31 11:59:22 -0300 | [diff] [blame] | 212 | } |
| 213 | EXPORT_SYMBOL_GPL(ir_raw_event_set_idle); |
| 214 | |
| 215 | /** |
David Härdeman | 724e249 | 2010-04-08 13:10:00 -0300 | [diff] [blame] | 216 | * ir_raw_event_handle() - schedules the decoding of stored ir data |
David Härdeman | d8b4b58 | 2010-10-29 16:08:23 -0300 | [diff] [blame] | 217 | * @dev: the struct rc_dev device descriptor |
David Härdeman | 724e249 | 2010-04-08 13:10:00 -0300 | [diff] [blame] | 218 | * |
David Härdeman | d8b4b58 | 2010-10-29 16:08:23 -0300 | [diff] [blame] | 219 | * This routine will tell rc-core to start decoding stored ir data. |
David Härdeman | 724e249 | 2010-04-08 13:10:00 -0300 | [diff] [blame] | 220 | */ |
David Härdeman | d8b4b58 | 2010-10-29 16:08:23 -0300 | [diff] [blame] | 221 | void ir_raw_event_handle(struct rc_dev *dev) |
David Härdeman | 724e249 | 2010-04-08 13:10:00 -0300 | [diff] [blame] | 222 | { |
Maxim Levitsky | c6ef1e7 | 2010-09-06 18:26:06 -0300 | [diff] [blame] | 223 | unsigned long flags; |
David Härdeman | 724e249 | 2010-04-08 13:10:00 -0300 | [diff] [blame] | 224 | |
David Härdeman | d8b4b58 | 2010-10-29 16:08:23 -0300 | [diff] [blame] | 225 | if (!dev->raw) |
David Härdeman | 724e249 | 2010-04-08 13:10:00 -0300 | [diff] [blame] | 226 | return; |
| 227 | |
David Härdeman | d8b4b58 | 2010-10-29 16:08:23 -0300 | [diff] [blame] | 228 | spin_lock_irqsave(&dev->raw->lock, flags); |
| 229 | wake_up_process(dev->raw->thread); |
| 230 | spin_unlock_irqrestore(&dev->raw->lock, flags); |
David Härdeman | 724e249 | 2010-04-08 13:10:00 -0300 | [diff] [blame] | 231 | } |
Mauro Carvalho Chehab | a3572c3 | 2010-03-20 20:59:44 -0300 | [diff] [blame] | 232 | EXPORT_SYMBOL_GPL(ir_raw_event_handle); |
Mauro Carvalho Chehab | 995187b | 2010-03-24 20:47:53 -0300 | [diff] [blame] | 233 | |
David Härdeman | 667c9eb | 2010-06-13 17:29:31 -0300 | [diff] [blame] | 234 | /* used internally by the sysfs interface */ |
| 235 | u64 |
| 236 | ir_raw_get_allowed_protocols() |
| 237 | { |
| 238 | u64 protocols; |
Maxim Levitsky | 45a568f | 2010-07-31 11:59:16 -0300 | [diff] [blame] | 239 | mutex_lock(&ir_raw_handler_lock); |
David Härdeman | 667c9eb | 2010-06-13 17:29:31 -0300 | [diff] [blame] | 240 | protocols = available_protocols; |
Maxim Levitsky | 45a568f | 2010-07-31 11:59:16 -0300 | [diff] [blame] | 241 | mutex_unlock(&ir_raw_handler_lock); |
David Härdeman | 667c9eb | 2010-06-13 17:29:31 -0300 | [diff] [blame] | 242 | return protocols; |
| 243 | } |
| 244 | |
| 245 | /* |
| 246 | * Used to (un)register raw event clients |
| 247 | */ |
David Härdeman | d8b4b58 | 2010-10-29 16:08:23 -0300 | [diff] [blame] | 248 | int ir_raw_event_register(struct rc_dev *dev) |
David Härdeman | 667c9eb | 2010-06-13 17:29:31 -0300 | [diff] [blame] | 249 | { |
David Härdeman | 667c9eb | 2010-06-13 17:29:31 -0300 | [diff] [blame] | 250 | int rc; |
David Härdeman | c216369 | 2010-06-13 17:29:36 -0300 | [diff] [blame] | 251 | struct ir_raw_handler *handler; |
David Härdeman | 667c9eb | 2010-06-13 17:29:31 -0300 | [diff] [blame] | 252 | |
David Härdeman | d8b4b58 | 2010-10-29 16:08:23 -0300 | [diff] [blame] | 253 | if (!dev) |
| 254 | return -EINVAL; |
| 255 | |
| 256 | dev->raw = kzalloc(sizeof(*dev->raw), GFP_KERNEL); |
| 257 | if (!dev->raw) |
David Härdeman | 667c9eb | 2010-06-13 17:29:31 -0300 | [diff] [blame] | 258 | return -ENOMEM; |
| 259 | |
David Härdeman | d8b4b58 | 2010-10-29 16:08:23 -0300 | [diff] [blame] | 260 | dev->raw->dev = dev; |
| 261 | dev->raw->enabled_protocols = ~0; |
| 262 | rc = kfifo_alloc(&dev->raw->kfifo, |
| 263 | sizeof(struct ir_raw_event) * MAX_IR_EVENT_SIZE, |
David Härdeman | 667c9eb | 2010-06-13 17:29:31 -0300 | [diff] [blame] | 264 | GFP_KERNEL); |
David Härdeman | d8b4b58 | 2010-10-29 16:08:23 -0300 | [diff] [blame] | 265 | if (rc < 0) |
| 266 | goto out; |
David Härdeman | 667c9eb | 2010-06-13 17:29:31 -0300 | [diff] [blame] | 267 | |
David Härdeman | d8b4b58 | 2010-10-29 16:08:23 -0300 | [diff] [blame] | 268 | spin_lock_init(&dev->raw->lock); |
| 269 | dev->raw->thread = kthread_run(ir_raw_event_thread, dev->raw, |
| 270 | "rc%ld", dev->devno); |
Maxim Levitsky | 0d2cb1d | 2010-07-31 11:59:17 -0300 | [diff] [blame] | 271 | |
David Härdeman | d8b4b58 | 2010-10-29 16:08:23 -0300 | [diff] [blame] | 272 | if (IS_ERR(dev->raw->thread)) { |
| 273 | rc = PTR_ERR(dev->raw->thread); |
| 274 | goto out; |
Maxim Levitsky | 0d2cb1d | 2010-07-31 11:59:17 -0300 | [diff] [blame] | 275 | } |
| 276 | |
Maxim Levitsky | 45a568f | 2010-07-31 11:59:16 -0300 | [diff] [blame] | 277 | mutex_lock(&ir_raw_handler_lock); |
David Härdeman | d8b4b58 | 2010-10-29 16:08:23 -0300 | [diff] [blame] | 278 | list_add_tail(&dev->raw->list, &ir_raw_client_list); |
David Härdeman | c216369 | 2010-06-13 17:29:36 -0300 | [diff] [blame] | 279 | list_for_each_entry(handler, &ir_raw_handler_list, list) |
| 280 | if (handler->raw_register) |
David Härdeman | d8b4b58 | 2010-10-29 16:08:23 -0300 | [diff] [blame] | 281 | handler->raw_register(dev); |
Maxim Levitsky | 45a568f | 2010-07-31 11:59:16 -0300 | [diff] [blame] | 282 | mutex_unlock(&ir_raw_handler_lock); |
David Härdeman | 667c9eb | 2010-06-13 17:29:31 -0300 | [diff] [blame] | 283 | |
David Härdeman | c216369 | 2010-06-13 17:29:36 -0300 | [diff] [blame] | 284 | return 0; |
David Härdeman | d8b4b58 | 2010-10-29 16:08:23 -0300 | [diff] [blame] | 285 | |
| 286 | out: |
| 287 | kfree(dev->raw); |
| 288 | dev->raw = NULL; |
| 289 | return rc; |
David Härdeman | 667c9eb | 2010-06-13 17:29:31 -0300 | [diff] [blame] | 290 | } |
| 291 | |
David Härdeman | d8b4b58 | 2010-10-29 16:08:23 -0300 | [diff] [blame] | 292 | void ir_raw_event_unregister(struct rc_dev *dev) |
David Härdeman | 667c9eb | 2010-06-13 17:29:31 -0300 | [diff] [blame] | 293 | { |
David Härdeman | c216369 | 2010-06-13 17:29:36 -0300 | [diff] [blame] | 294 | struct ir_raw_handler *handler; |
David Härdeman | 667c9eb | 2010-06-13 17:29:31 -0300 | [diff] [blame] | 295 | |
David Härdeman | d8b4b58 | 2010-10-29 16:08:23 -0300 | [diff] [blame] | 296 | if (!dev || !dev->raw) |
David Härdeman | 667c9eb | 2010-06-13 17:29:31 -0300 | [diff] [blame] | 297 | return; |
| 298 | |
David Härdeman | d8b4b58 | 2010-10-29 16:08:23 -0300 | [diff] [blame] | 299 | kthread_stop(dev->raw->thread); |
David Härdeman | c216369 | 2010-06-13 17:29:36 -0300 | [diff] [blame] | 300 | |
Maxim Levitsky | 45a568f | 2010-07-31 11:59:16 -0300 | [diff] [blame] | 301 | mutex_lock(&ir_raw_handler_lock); |
David Härdeman | d8b4b58 | 2010-10-29 16:08:23 -0300 | [diff] [blame] | 302 | list_del(&dev->raw->list); |
David Härdeman | c216369 | 2010-06-13 17:29:36 -0300 | [diff] [blame] | 303 | list_for_each_entry(handler, &ir_raw_handler_list, list) |
| 304 | if (handler->raw_unregister) |
David Härdeman | d8b4b58 | 2010-10-29 16:08:23 -0300 | [diff] [blame] | 305 | handler->raw_unregister(dev); |
Maxim Levitsky | 45a568f | 2010-07-31 11:59:16 -0300 | [diff] [blame] | 306 | mutex_unlock(&ir_raw_handler_lock); |
David Härdeman | 667c9eb | 2010-06-13 17:29:31 -0300 | [diff] [blame] | 307 | |
David Härdeman | d8b4b58 | 2010-10-29 16:08:23 -0300 | [diff] [blame] | 308 | kfifo_free(&dev->raw->kfifo); |
| 309 | kfree(dev->raw); |
| 310 | dev->raw = NULL; |
David Härdeman | 667c9eb | 2010-06-13 17:29:31 -0300 | [diff] [blame] | 311 | } |
| 312 | |
Mauro Carvalho Chehab | 995187b | 2010-03-24 20:47:53 -0300 | [diff] [blame] | 313 | /* |
| 314 | * Extension interface - used to register the IR decoders |
| 315 | */ |
| 316 | |
| 317 | int ir_raw_handler_register(struct ir_raw_handler *ir_raw_handler) |
| 318 | { |
David Härdeman | c216369 | 2010-06-13 17:29:36 -0300 | [diff] [blame] | 319 | struct ir_raw_event_ctrl *raw; |
| 320 | |
Maxim Levitsky | 45a568f | 2010-07-31 11:59:16 -0300 | [diff] [blame] | 321 | mutex_lock(&ir_raw_handler_lock); |
Mauro Carvalho Chehab | 995187b | 2010-03-24 20:47:53 -0300 | [diff] [blame] | 322 | list_add_tail(&ir_raw_handler->list, &ir_raw_handler_list); |
David Härdeman | c216369 | 2010-06-13 17:29:36 -0300 | [diff] [blame] | 323 | if (ir_raw_handler->raw_register) |
| 324 | list_for_each_entry(raw, &ir_raw_client_list, list) |
David Härdeman | d8b4b58 | 2010-10-29 16:08:23 -0300 | [diff] [blame] | 325 | ir_raw_handler->raw_register(raw->dev); |
David Härdeman | 667c9eb | 2010-06-13 17:29:31 -0300 | [diff] [blame] | 326 | available_protocols |= ir_raw_handler->protocols; |
Maxim Levitsky | 45a568f | 2010-07-31 11:59:16 -0300 | [diff] [blame] | 327 | mutex_unlock(&ir_raw_handler_lock); |
David Härdeman | 667c9eb | 2010-06-13 17:29:31 -0300 | [diff] [blame] | 328 | |
Mauro Carvalho Chehab | 995187b | 2010-03-24 20:47:53 -0300 | [diff] [blame] | 329 | return 0; |
| 330 | } |
| 331 | EXPORT_SYMBOL(ir_raw_handler_register); |
| 332 | |
| 333 | void ir_raw_handler_unregister(struct ir_raw_handler *ir_raw_handler) |
| 334 | { |
David Härdeman | c216369 | 2010-06-13 17:29:36 -0300 | [diff] [blame] | 335 | struct ir_raw_event_ctrl *raw; |
| 336 | |
Maxim Levitsky | 45a568f | 2010-07-31 11:59:16 -0300 | [diff] [blame] | 337 | mutex_lock(&ir_raw_handler_lock); |
Mauro Carvalho Chehab | 995187b | 2010-03-24 20:47:53 -0300 | [diff] [blame] | 338 | list_del(&ir_raw_handler->list); |
David Härdeman | c216369 | 2010-06-13 17:29:36 -0300 | [diff] [blame] | 339 | if (ir_raw_handler->raw_unregister) |
| 340 | list_for_each_entry(raw, &ir_raw_client_list, list) |
David Härdeman | d8b4b58 | 2010-10-29 16:08:23 -0300 | [diff] [blame] | 341 | ir_raw_handler->raw_unregister(raw->dev); |
David Härdeman | 667c9eb | 2010-06-13 17:29:31 -0300 | [diff] [blame] | 342 | available_protocols &= ~ir_raw_handler->protocols; |
Maxim Levitsky | 45a568f | 2010-07-31 11:59:16 -0300 | [diff] [blame] | 343 | mutex_unlock(&ir_raw_handler_lock); |
Mauro Carvalho Chehab | 995187b | 2010-03-24 20:47:53 -0300 | [diff] [blame] | 344 | } |
| 345 | EXPORT_SYMBOL(ir_raw_handler_unregister); |
| 346 | |
Mauro Carvalho Chehab | 5fa2989 | 2010-04-08 19:04:06 -0300 | [diff] [blame] | 347 | #ifdef MODULE |
Mauro Carvalho Chehab | 995187b | 2010-03-24 20:47:53 -0300 | [diff] [blame] | 348 | static void init_decoders(struct work_struct *work) |
| 349 | { |
| 350 | /* Load the decoder modules */ |
| 351 | |
| 352 | load_nec_decode(); |
Mauro Carvalho Chehab | db1423a | 2010-04-04 10:27:20 -0300 | [diff] [blame] | 353 | load_rc5_decode(); |
David Härdeman | 784a493 | 2010-04-08 20:04:40 -0300 | [diff] [blame] | 354 | load_rc6_decode(); |
David Härdeman | bf670f6 | 2010-04-15 18:46:05 -0300 | [diff] [blame] | 355 | load_jvc_decode(); |
David Härdeman | 3fe29c8 | 2010-04-15 18:46:10 -0300 | [diff] [blame] | 356 | load_sony_decode(); |
Jarod Wilson | ca41469 | 2010-07-03 01:07:53 -0300 | [diff] [blame] | 357 | load_lirc_codec(); |
Mauro Carvalho Chehab | 995187b | 2010-03-24 20:47:53 -0300 | [diff] [blame] | 358 | |
| 359 | /* If needed, we may later add some init code. In this case, |
Mauro Carvalho Chehab | 6bda964 | 2010-11-17 13:28:38 -0300 | [diff] [blame] | 360 | it is needed to change the CONFIG_MODULE test at rc-core.h |
Mauro Carvalho Chehab | 995187b | 2010-03-24 20:47:53 -0300 | [diff] [blame] | 361 | */ |
| 362 | } |
Mauro Carvalho Chehab | 5fa2989 | 2010-04-08 19:04:06 -0300 | [diff] [blame] | 363 | #endif |
Mauro Carvalho Chehab | 995187b | 2010-03-24 20:47:53 -0300 | [diff] [blame] | 364 | |
| 365 | void ir_raw_init(void) |
| 366 | { |
Mauro Carvalho Chehab | 93c312f | 2010-03-25 21:13:43 -0300 | [diff] [blame] | 367 | #ifdef MODULE |
Mauro Carvalho Chehab | 995187b | 2010-03-24 20:47:53 -0300 | [diff] [blame] | 368 | INIT_WORK(&wq_load, init_decoders); |
| 369 | schedule_work(&wq_load); |
Mauro Carvalho Chehab | 93c312f | 2010-03-25 21:13:43 -0300 | [diff] [blame] | 370 | #endif |
| 371 | } |