Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Timers abstract layer |
Jaroslav Kysela | c1017a4 | 2007-10-15 09:50:19 +0200 | [diff] [blame] | 3 | * Copyright (c) by Jaroslav Kysela <perex@perex.cz> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 4 | * |
| 5 | * |
| 6 | * This program is free software; you can redistribute it and/or modify |
| 7 | * it under the terms of the GNU General Public License as published by |
| 8 | * the Free Software Foundation; either version 2 of the License, or |
| 9 | * (at your option) any later version. |
| 10 | * |
| 11 | * This program is distributed in the hope that it will be useful, |
| 12 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 13 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 14 | * GNU General Public License for more details. |
| 15 | * |
| 16 | * You should have received a copy of the GNU General Public License |
| 17 | * along with this program; if not, write to the Free Software |
| 18 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 19 | * |
| 20 | */ |
| 21 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 22 | #include <linux/delay.h> |
| 23 | #include <linux/init.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 24 | #include <linux/slab.h> |
| 25 | #include <linux/time.h> |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 26 | #include <linux/mutex.h> |
Paul Gortmaker | 51990e8 | 2012-01-22 11:23:42 -0500 | [diff] [blame] | 27 | #include <linux/device.h> |
Paul Gortmaker | 65a7721 | 2011-07-15 13:13:37 -0400 | [diff] [blame] | 28 | #include <linux/module.h> |
Paulo Marques | 543537b | 2005-06-23 00:09:02 -0700 | [diff] [blame] | 29 | #include <linux/string.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include <sound/core.h> |
| 31 | #include <sound/timer.h> |
| 32 | #include <sound/control.h> |
| 33 | #include <sound/info.h> |
| 34 | #include <sound/minors.h> |
| 35 | #include <sound/initval.h> |
| 36 | #include <linux/kmod.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | |
Takashi Iwai | 9f8a765 | 2016-09-07 15:45:31 +0200 | [diff] [blame] | 38 | /* internal flags */ |
| 39 | #define SNDRV_TIMER_IFLG_PAUSED 0x00010000 |
| 40 | |
Takashi Iwai | 8eeaa2f | 2014-02-10 09:48:47 +0100 | [diff] [blame] | 41 | #if IS_ENABLED(CONFIG_SND_HRTIMER) |
Clemens Ladisch | 109fef9 | 2010-11-18 09:53:54 +0100 | [diff] [blame] | 42 | #define DEFAULT_TIMER_LIMIT 4 |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | #else |
| 44 | #define DEFAULT_TIMER_LIMIT 1 |
| 45 | #endif |
| 46 | |
| 47 | static int timer_limit = DEFAULT_TIMER_LIMIT; |
Jaroslav Kysela | b751eef | 2007-12-13 10:19:42 +0100 | [diff] [blame] | 48 | static int timer_tstamp_monotonic = 1; |
Jaroslav Kysela | c1017a4 | 2007-10-15 09:50:19 +0200 | [diff] [blame] | 49 | MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.de>"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 50 | MODULE_DESCRIPTION("ALSA timer interface"); |
| 51 | MODULE_LICENSE("GPL"); |
| 52 | module_param(timer_limit, int, 0444); |
| 53 | MODULE_PARM_DESC(timer_limit, "Maximum global timers in system."); |
Jaroslav Kysela | b751eef | 2007-12-13 10:19:42 +0100 | [diff] [blame] | 54 | module_param(timer_tstamp_monotonic, int, 0444); |
| 55 | MODULE_PARM_DESC(timer_tstamp_monotonic, "Use posix monotonic clock source for timestamps (default)."); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 56 | |
Kay Sievers | 03cfe6f | 2010-11-23 17:43:19 +0100 | [diff] [blame] | 57 | MODULE_ALIAS_CHARDEV(CONFIG_SND_MAJOR, SNDRV_MINOR_TIMER); |
| 58 | MODULE_ALIAS("devname:snd/timer"); |
| 59 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 60 | struct snd_timer_user { |
| 61 | struct snd_timer_instance *timeri; |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 62 | int tread; /* enhanced read with timestamps and events */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 63 | unsigned long ticks; |
| 64 | unsigned long overrun; |
| 65 | int qhead; |
| 66 | int qtail; |
| 67 | int qused; |
| 68 | int queue_size; |
Takashi Iwai | 230323d | 2016-01-21 17:19:31 +0100 | [diff] [blame] | 69 | bool disconnected; |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 70 | struct snd_timer_read *queue; |
| 71 | struct snd_timer_tread *tqueue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 72 | spinlock_t qlock; |
| 73 | unsigned long last_resolution; |
| 74 | unsigned int filter; |
| 75 | struct timespec tstamp; /* trigger tstamp */ |
| 76 | wait_queue_head_t qchange_sleep; |
| 77 | struct fasync_struct *fasync; |
Takashi Iwai | af36802 | 2016-01-13 17:48:01 +0100 | [diff] [blame] | 78 | struct mutex ioctl_lock; |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 79 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 80 | |
| 81 | /* list of timers */ |
| 82 | static LIST_HEAD(snd_timer_list); |
| 83 | |
| 84 | /* list of slave instances */ |
| 85 | static LIST_HEAD(snd_timer_slave_list); |
| 86 | |
| 87 | /* lock for slave active lists */ |
| 88 | static DEFINE_SPINLOCK(slave_active_lock); |
| 89 | |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 90 | static DEFINE_MUTEX(register_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 92 | static int snd_timer_free(struct snd_timer *timer); |
| 93 | static int snd_timer_dev_free(struct snd_device *device); |
| 94 | static int snd_timer_dev_register(struct snd_device *device); |
Takashi Iwai | c461482 | 2006-06-23 14:38:23 +0200 | [diff] [blame] | 95 | static int snd_timer_dev_disconnect(struct snd_device *device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 97 | static void snd_timer_reschedule(struct snd_timer * timer, unsigned long ticks_left); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | |
| 99 | /* |
| 100 | * create a timer instance with the given owner string. |
| 101 | * when timer is not NULL, increments the module counter |
| 102 | */ |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 103 | static struct snd_timer_instance *snd_timer_instance_new(char *owner, |
| 104 | struct snd_timer *timer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 106 | struct snd_timer_instance *timeri; |
Takashi Iwai | ca2c096 | 2005-09-09 14:20:23 +0200 | [diff] [blame] | 107 | timeri = kzalloc(sizeof(*timeri), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | if (timeri == NULL) |
| 109 | return NULL; |
Paulo Marques | 543537b | 2005-06-23 00:09:02 -0700 | [diff] [blame] | 110 | timeri->owner = kstrdup(owner, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 111 | if (! timeri->owner) { |
| 112 | kfree(timeri); |
| 113 | return NULL; |
| 114 | } |
| 115 | INIT_LIST_HEAD(&timeri->open_list); |
| 116 | INIT_LIST_HEAD(&timeri->active_list); |
| 117 | INIT_LIST_HEAD(&timeri->ack_list); |
| 118 | INIT_LIST_HEAD(&timeri->slave_list_head); |
| 119 | INIT_LIST_HEAD(&timeri->slave_active_head); |
| 120 | |
| 121 | timeri->timer = timer; |
Clemens Ladisch | de24214 | 2005-10-12 17:12:31 +0200 | [diff] [blame] | 122 | if (timer && !try_module_get(timer->module)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 123 | kfree(timeri->owner); |
| 124 | kfree(timeri); |
| 125 | return NULL; |
| 126 | } |
| 127 | |
| 128 | return timeri; |
| 129 | } |
| 130 | |
| 131 | /* |
| 132 | * find a timer instance from the given timer id |
| 133 | */ |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 134 | static struct snd_timer *snd_timer_find(struct snd_timer_id *tid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 136 | struct snd_timer *timer = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 138 | list_for_each_entry(timer, &snd_timer_list, device_list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | if (timer->tmr_class != tid->dev_class) |
| 140 | continue; |
| 141 | if ((timer->tmr_class == SNDRV_TIMER_CLASS_CARD || |
| 142 | timer->tmr_class == SNDRV_TIMER_CLASS_PCM) && |
| 143 | (timer->card == NULL || |
| 144 | timer->card->number != tid->card)) |
| 145 | continue; |
| 146 | if (timer->tmr_device != tid->device) |
| 147 | continue; |
| 148 | if (timer->tmr_subdevice != tid->subdevice) |
| 149 | continue; |
| 150 | return timer; |
| 151 | } |
| 152 | return NULL; |
| 153 | } |
| 154 | |
Johannes Berg | ee2da99 | 2008-07-09 10:28:41 +0200 | [diff] [blame] | 155 | #ifdef CONFIG_MODULES |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 157 | static void snd_timer_request(struct snd_timer_id *tid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | switch (tid->dev_class) { |
| 160 | case SNDRV_TIMER_CLASS_GLOBAL: |
| 161 | if (tid->device < timer_limit) |
| 162 | request_module("snd-timer-%i", tid->device); |
| 163 | break; |
| 164 | case SNDRV_TIMER_CLASS_CARD: |
| 165 | case SNDRV_TIMER_CLASS_PCM: |
| 166 | if (tid->card < snd_ecards_limit) |
| 167 | request_module("snd-card-%i", tid->card); |
| 168 | break; |
| 169 | default: |
| 170 | break; |
| 171 | } |
| 172 | } |
| 173 | |
| 174 | #endif |
| 175 | |
| 176 | /* |
| 177 | * look for a master instance matching with the slave id of the given slave. |
| 178 | * when found, relink the open_link of the slave. |
| 179 | * |
| 180 | * call this with register_mutex down. |
| 181 | */ |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 182 | static void snd_timer_check_slave(struct snd_timer_instance *slave) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 184 | struct snd_timer *timer; |
| 185 | struct snd_timer_instance *master; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 186 | |
| 187 | /* FIXME: it's really dumb to look up all entries.. */ |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 188 | list_for_each_entry(timer, &snd_timer_list, device_list) { |
| 189 | list_for_each_entry(master, &timer->open_list_head, open_list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 190 | if (slave->slave_class == master->slave_class && |
| 191 | slave->slave_id == master->slave_id) { |
Nicolas Kaiser | 5b7c757 | 2011-03-16 17:10:11 +0100 | [diff] [blame] | 192 | list_move_tail(&slave->open_list, |
| 193 | &master->slave_list_head); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 194 | spin_lock_irq(&slave_active_lock); |
| 195 | slave->master = master; |
| 196 | slave->timer = master->timer; |
| 197 | spin_unlock_irq(&slave_active_lock); |
| 198 | return; |
| 199 | } |
| 200 | } |
| 201 | } |
| 202 | } |
| 203 | |
| 204 | /* |
| 205 | * look for slave instances matching with the slave id of the given master. |
| 206 | * when found, relink the open_link of slaves. |
| 207 | * |
| 208 | * call this with register_mutex down. |
| 209 | */ |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 210 | static void snd_timer_check_master(struct snd_timer_instance *master) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | { |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 212 | struct snd_timer_instance *slave, *tmp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 213 | |
| 214 | /* check all pending slaves */ |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 215 | list_for_each_entry_safe(slave, tmp, &snd_timer_slave_list, open_list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | if (slave->slave_class == master->slave_class && |
| 217 | slave->slave_id == master->slave_id) { |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 218 | list_move_tail(&slave->open_list, &master->slave_list_head); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | spin_lock_irq(&slave_active_lock); |
Takashi Iwai | b5a663a | 2016-01-14 16:30:58 +0100 | [diff] [blame] | 220 | spin_lock(&master->timer->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | slave->master = master; |
| 222 | slave->timer = master->timer; |
| 223 | if (slave->flags & SNDRV_TIMER_IFLG_RUNNING) |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 224 | list_add_tail(&slave->active_list, |
| 225 | &master->slave_active_head); |
Takashi Iwai | b5a663a | 2016-01-14 16:30:58 +0100 | [diff] [blame] | 226 | spin_unlock(&master->timer->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 227 | spin_unlock_irq(&slave_active_lock); |
| 228 | } |
| 229 | } |
| 230 | } |
| 231 | |
| 232 | /* |
| 233 | * open a timer instance |
| 234 | * when opening a master, the slave id must be here given. |
| 235 | */ |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 236 | int snd_timer_open(struct snd_timer_instance **ti, |
| 237 | char *owner, struct snd_timer_id *tid, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | unsigned int slave_id) |
| 239 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 240 | struct snd_timer *timer; |
| 241 | struct snd_timer_instance *timeri = NULL; |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 242 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | if (tid->dev_class == SNDRV_TIMER_CLASS_SLAVE) { |
| 244 | /* open a slave instance */ |
| 245 | if (tid->dev_sclass <= SNDRV_TIMER_SCLASS_NONE || |
| 246 | tid->dev_sclass > SNDRV_TIMER_SCLASS_OSS_SEQUENCER) { |
Takashi Iwai | cf74dcf | 2014-02-04 18:22:39 +0100 | [diff] [blame] | 247 | pr_debug("ALSA: timer: invalid slave class %i\n", |
| 248 | tid->dev_sclass); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 249 | return -EINVAL; |
| 250 | } |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 251 | mutex_lock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | timeri = snd_timer_instance_new(owner, NULL); |
Clemens Ladisch | 2fd43d1 | 2005-10-12 17:10:35 +0200 | [diff] [blame] | 253 | if (!timeri) { |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 254 | mutex_unlock(®ister_mutex); |
Clemens Ladisch | 2fd43d1 | 2005-10-12 17:10:35 +0200 | [diff] [blame] | 255 | return -ENOMEM; |
| 256 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 257 | timeri->slave_class = tid->dev_sclass; |
| 258 | timeri->slave_id = tid->device; |
| 259 | timeri->flags |= SNDRV_TIMER_IFLG_SLAVE; |
| 260 | list_add_tail(&timeri->open_list, &snd_timer_slave_list); |
| 261 | snd_timer_check_slave(timeri); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 262 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | *ti = timeri; |
| 264 | return 0; |
| 265 | } |
| 266 | |
| 267 | /* open a master instance */ |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 268 | mutex_lock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 269 | timer = snd_timer_find(tid); |
Johannes Berg | ee2da99 | 2008-07-09 10:28:41 +0200 | [diff] [blame] | 270 | #ifdef CONFIG_MODULES |
| 271 | if (!timer) { |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 272 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | snd_timer_request(tid); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 274 | mutex_lock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 275 | timer = snd_timer_find(tid); |
| 276 | } |
| 277 | #endif |
Clemens Ladisch | 2fd43d1 | 2005-10-12 17:10:35 +0200 | [diff] [blame] | 278 | if (!timer) { |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 279 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 280 | return -ENODEV; |
| 281 | } |
Clemens Ladisch | 2fd43d1 | 2005-10-12 17:10:35 +0200 | [diff] [blame] | 282 | if (!list_empty(&timer->open_list_head)) { |
| 283 | timeri = list_entry(timer->open_list_head.next, |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 284 | struct snd_timer_instance, open_list); |
Clemens Ladisch | 2fd43d1 | 2005-10-12 17:10:35 +0200 | [diff] [blame] | 285 | if (timeri->flags & SNDRV_TIMER_IFLG_EXCLUSIVE) { |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 286 | mutex_unlock(®ister_mutex); |
Clemens Ladisch | 2fd43d1 | 2005-10-12 17:10:35 +0200 | [diff] [blame] | 287 | return -EBUSY; |
| 288 | } |
| 289 | } |
| 290 | timeri = snd_timer_instance_new(owner, timer); |
| 291 | if (!timeri) { |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 292 | mutex_unlock(®ister_mutex); |
Clemens Ladisch | 2fd43d1 | 2005-10-12 17:10:35 +0200 | [diff] [blame] | 293 | return -ENOMEM; |
| 294 | } |
Takashi Iwai | 230323d | 2016-01-21 17:19:31 +0100 | [diff] [blame] | 295 | /* take a card refcount for safe disconnection */ |
| 296 | if (timer->card) |
| 297 | get_device(&timer->card->card_dev); |
Clemens Ladisch | 2fd43d1 | 2005-10-12 17:10:35 +0200 | [diff] [blame] | 298 | timeri->slave_class = tid->dev_sclass; |
| 299 | timeri->slave_id = slave_id; |
Vegard Nossum | 8ddc056 | 2016-08-29 00:33:51 +0200 | [diff] [blame] | 300 | |
| 301 | if (list_empty(&timer->open_list_head) && timer->hw.open) { |
| 302 | int err = timer->hw.open(timer); |
| 303 | if (err) { |
| 304 | kfree(timeri->owner); |
| 305 | kfree(timeri); |
| 306 | |
| 307 | if (timer->card) |
| 308 | put_device(&timer->card->card_dev); |
| 309 | module_put(timer->module); |
| 310 | mutex_unlock(®ister_mutex); |
| 311 | return err; |
| 312 | } |
| 313 | } |
| 314 | |
Clemens Ladisch | 2fd43d1 | 2005-10-12 17:10:35 +0200 | [diff] [blame] | 315 | list_add_tail(&timeri->open_list, &timer->open_list_head); |
| 316 | snd_timer_check_master(timeri); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 317 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 318 | *ti = timeri; |
| 319 | return 0; |
| 320 | } |
| 321 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 322 | /* |
| 323 | * close a timer instance |
| 324 | */ |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 325 | int snd_timer_close(struct snd_timer_instance *timeri) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 327 | struct snd_timer *timer = NULL; |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 328 | struct snd_timer_instance *slave, *tmp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | |
Takashi Iwai | 0072889 | 2008-08-14 07:51:57 +0200 | [diff] [blame] | 330 | if (snd_BUG_ON(!timeri)) |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 331 | return -ENXIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | |
Takashi Iwai | 9984d1b | 2016-02-10 11:53:30 +0100 | [diff] [blame] | 333 | mutex_lock(®ister_mutex); |
| 334 | list_del(&timeri->open_list); |
| 335 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | /* force to stop the timer */ |
| 337 | snd_timer_stop(timeri); |
| 338 | |
Takashi Iwai | 9984d1b | 2016-02-10 11:53:30 +0100 | [diff] [blame] | 339 | timer = timeri->timer; |
| 340 | if (timer) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | /* wait, until the active callback is finished */ |
| 342 | spin_lock_irq(&timer->lock); |
| 343 | while (timeri->flags & SNDRV_TIMER_IFLG_CALLBACK) { |
| 344 | spin_unlock_irq(&timer->lock); |
| 345 | udelay(10); |
| 346 | spin_lock_irq(&timer->lock); |
| 347 | } |
| 348 | spin_unlock_irq(&timer->lock); |
Takashi Iwai | 9984d1b | 2016-02-10 11:53:30 +0100 | [diff] [blame] | 349 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 350 | /* remove slave links */ |
Takashi Iwai | b5a663a | 2016-01-14 16:30:58 +0100 | [diff] [blame] | 351 | spin_lock_irq(&slave_active_lock); |
| 352 | spin_lock(&timer->lock); |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 353 | list_for_each_entry_safe(slave, tmp, &timeri->slave_list_head, |
| 354 | open_list) { |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 355 | list_move_tail(&slave->open_list, &snd_timer_slave_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 356 | slave->master = NULL; |
| 357 | slave->timer = NULL; |
Takashi Iwai | b5a663a | 2016-01-14 16:30:58 +0100 | [diff] [blame] | 358 | list_del_init(&slave->ack_list); |
| 359 | list_del_init(&slave->active_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 360 | } |
Takashi Iwai | b5a663a | 2016-01-14 16:30:58 +0100 | [diff] [blame] | 361 | spin_unlock(&timer->lock); |
| 362 | spin_unlock_irq(&slave_active_lock); |
Takashi Iwai | 9984d1b | 2016-02-10 11:53:30 +0100 | [diff] [blame] | 363 | |
| 364 | /* slave doesn't need to release timer resources below */ |
| 365 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) |
| 366 | timer = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 367 | } |
Takashi Iwai | 9984d1b | 2016-02-10 11:53:30 +0100 | [diff] [blame] | 368 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | if (timeri->private_free) |
| 370 | timeri->private_free(timeri); |
| 371 | kfree(timeri->owner); |
| 372 | kfree(timeri); |
Takashi Iwai | 9984d1b | 2016-02-10 11:53:30 +0100 | [diff] [blame] | 373 | |
| 374 | if (timer) { |
| 375 | if (list_empty(&timer->open_list_head) && timer->hw.close) |
| 376 | timer->hw.close(timer); |
| 377 | /* release a card refcount for safe disconnection */ |
| 378 | if (timer->card) |
| 379 | put_device(&timer->card->card_dev); |
Clemens Ladisch | de24214 | 2005-10-12 17:12:31 +0200 | [diff] [blame] | 380 | module_put(timer->module); |
Takashi Iwai | 9984d1b | 2016-02-10 11:53:30 +0100 | [diff] [blame] | 381 | } |
| 382 | |
| 383 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | return 0; |
| 385 | } |
| 386 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 387 | unsigned long snd_timer_resolution(struct snd_timer_instance *timeri) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 388 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 389 | struct snd_timer * timer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 390 | |
| 391 | if (timeri == NULL) |
| 392 | return 0; |
| 393 | if ((timer = timeri->timer) != NULL) { |
| 394 | if (timer->hw.c_resolution) |
| 395 | return timer->hw.c_resolution(timer); |
| 396 | return timer->hw.resolution; |
| 397 | } |
| 398 | return 0; |
| 399 | } |
| 400 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 401 | static void snd_timer_notify1(struct snd_timer_instance *ti, int event) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 403 | struct snd_timer *timer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 404 | unsigned long resolution = 0; |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 405 | struct snd_timer_instance *ts; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 406 | struct timespec tstamp; |
| 407 | |
Jaroslav Kysela | b751eef | 2007-12-13 10:19:42 +0100 | [diff] [blame] | 408 | if (timer_tstamp_monotonic) |
Thomas Gleixner | 26204e0 | 2014-06-11 23:59:14 +0000 | [diff] [blame] | 409 | ktime_get_ts(&tstamp); |
Jaroslav Kysela | b751eef | 2007-12-13 10:19:42 +0100 | [diff] [blame] | 410 | else |
| 411 | getnstimeofday(&tstamp); |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 412 | if (snd_BUG_ON(event < SNDRV_TIMER_EVENT_START || |
| 413 | event > SNDRV_TIMER_EVENT_PAUSE)) |
| 414 | return; |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 415 | if (event == SNDRV_TIMER_EVENT_START || |
| 416 | event == SNDRV_TIMER_EVENT_CONTINUE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | resolution = snd_timer_resolution(ti); |
| 418 | if (ti->ccallback) |
Jaroslav Kysela | b30477d | 2010-03-03 11:05:55 +0100 | [diff] [blame] | 419 | ti->ccallback(ti, event, &tstamp, resolution); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 420 | if (ti->flags & SNDRV_TIMER_IFLG_SLAVE) |
| 421 | return; |
| 422 | timer = ti->timer; |
| 423 | if (timer == NULL) |
| 424 | return; |
| 425 | if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) |
| 426 | return; |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 427 | list_for_each_entry(ts, &ti->slave_active_head, active_list) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 428 | if (ts->ccallback) |
Takashi Iwai | 117159f | 2016-02-08 17:36:25 +0100 | [diff] [blame] | 429 | ts->ccallback(ts, event + 100, &tstamp, resolution); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 430 | } |
| 431 | |
Takashi Iwai | f65e0d2 | 2016-02-10 12:47:03 +0100 | [diff] [blame] | 432 | /* start/continue a master timer */ |
| 433 | static int snd_timer_start1(struct snd_timer_instance *timeri, |
| 434 | bool start, unsigned long ticks) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 435 | { |
Takashi Iwai | f65e0d2 | 2016-02-10 12:47:03 +0100 | [diff] [blame] | 436 | struct snd_timer *timer; |
| 437 | int result; |
| 438 | unsigned long flags; |
| 439 | |
| 440 | timer = timeri->timer; |
| 441 | if (!timer) |
| 442 | return -EINVAL; |
| 443 | |
| 444 | spin_lock_irqsave(&timer->lock, flags); |
| 445 | if (timer->card && timer->card->shutdown) { |
| 446 | result = -ENODEV; |
| 447 | goto unlock; |
| 448 | } |
| 449 | if (timeri->flags & (SNDRV_TIMER_IFLG_RUNNING | |
| 450 | SNDRV_TIMER_IFLG_START)) { |
| 451 | result = -EBUSY; |
| 452 | goto unlock; |
| 453 | } |
| 454 | |
| 455 | if (start) |
| 456 | timeri->ticks = timeri->cticks = ticks; |
| 457 | else if (!timeri->cticks) |
| 458 | timeri->cticks = 1; |
| 459 | timeri->pticks = 0; |
| 460 | |
Nicolas Kaiser | 5b7c757 | 2011-03-16 17:10:11 +0100 | [diff] [blame] | 461 | list_move_tail(&timeri->active_list, &timer->active_list_head); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | if (timer->running) { |
| 463 | if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) |
| 464 | goto __start_now; |
| 465 | timer->flags |= SNDRV_TIMER_FLG_RESCHED; |
| 466 | timeri->flags |= SNDRV_TIMER_IFLG_START; |
Takashi Iwai | f65e0d2 | 2016-02-10 12:47:03 +0100 | [diff] [blame] | 467 | result = 1; /* delayed start */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 468 | } else { |
Takashi Iwai | f65e0d2 | 2016-02-10 12:47:03 +0100 | [diff] [blame] | 469 | if (start) |
| 470 | timer->sticks = ticks; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 471 | timer->hw.start(timer); |
| 472 | __start_now: |
| 473 | timer->running++; |
| 474 | timeri->flags |= SNDRV_TIMER_IFLG_RUNNING; |
Takashi Iwai | f65e0d2 | 2016-02-10 12:47:03 +0100 | [diff] [blame] | 475 | result = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 476 | } |
Takashi Iwai | f65e0d2 | 2016-02-10 12:47:03 +0100 | [diff] [blame] | 477 | snd_timer_notify1(timeri, start ? SNDRV_TIMER_EVENT_START : |
| 478 | SNDRV_TIMER_EVENT_CONTINUE); |
| 479 | unlock: |
| 480 | spin_unlock_irqrestore(&timer->lock, flags); |
| 481 | return result; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | } |
| 483 | |
Takashi Iwai | f65e0d2 | 2016-02-10 12:47:03 +0100 | [diff] [blame] | 484 | /* start/continue a slave timer */ |
| 485 | static int snd_timer_start_slave(struct snd_timer_instance *timeri, |
| 486 | bool start) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | { |
| 488 | unsigned long flags; |
| 489 | |
| 490 | spin_lock_irqsave(&slave_active_lock, flags); |
Takashi Iwai | f784beb | 2016-01-30 23:09:08 +0100 | [diff] [blame] | 491 | if (timeri->flags & SNDRV_TIMER_IFLG_RUNNING) { |
| 492 | spin_unlock_irqrestore(&slave_active_lock, flags); |
| 493 | return -EBUSY; |
| 494 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 495 | timeri->flags |= SNDRV_TIMER_IFLG_RUNNING; |
Takashi Iwai | b5a663a | 2016-01-14 16:30:58 +0100 | [diff] [blame] | 496 | if (timeri->master && timeri->timer) { |
| 497 | spin_lock(&timeri->timer->lock); |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 498 | list_add_tail(&timeri->active_list, |
| 499 | &timeri->master->slave_active_head); |
Takashi Iwai | f65e0d2 | 2016-02-10 12:47:03 +0100 | [diff] [blame] | 500 | snd_timer_notify1(timeri, start ? SNDRV_TIMER_EVENT_START : |
| 501 | SNDRV_TIMER_EVENT_CONTINUE); |
Takashi Iwai | b5a663a | 2016-01-14 16:30:58 +0100 | [diff] [blame] | 502 | spin_unlock(&timeri->timer->lock); |
| 503 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | spin_unlock_irqrestore(&slave_active_lock, flags); |
| 505 | return 1; /* delayed start */ |
| 506 | } |
| 507 | |
Takashi Iwai | f65e0d2 | 2016-02-10 12:47:03 +0100 | [diff] [blame] | 508 | /* stop/pause a master timer */ |
| 509 | static int snd_timer_stop1(struct snd_timer_instance *timeri, bool stop) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 510 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 511 | struct snd_timer *timer; |
Takashi Iwai | f65e0d2 | 2016-02-10 12:47:03 +0100 | [diff] [blame] | 512 | int result = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 513 | unsigned long flags; |
| 514 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | timer = timeri->timer; |
| 516 | if (!timer) |
| 517 | return -EINVAL; |
| 518 | spin_lock_irqsave(&timer->lock, flags); |
Takashi Iwai | f784beb | 2016-01-30 23:09:08 +0100 | [diff] [blame] | 519 | if (!(timeri->flags & (SNDRV_TIMER_IFLG_RUNNING | |
| 520 | SNDRV_TIMER_IFLG_START))) { |
Takashi Iwai | f65e0d2 | 2016-02-10 12:47:03 +0100 | [diff] [blame] | 521 | result = -EBUSY; |
| 522 | goto unlock; |
Takashi Iwai | f784beb | 2016-01-30 23:09:08 +0100 | [diff] [blame] | 523 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | list_del_init(&timeri->ack_list); |
| 525 | list_del_init(&timeri->active_list); |
Takashi Iwai | f65e0d2 | 2016-02-10 12:47:03 +0100 | [diff] [blame] | 526 | if (timer->card && timer->card->shutdown) |
| 527 | goto unlock; |
| 528 | if (stop) { |
| 529 | timeri->cticks = timeri->ticks; |
| 530 | timeri->pticks = 0; |
Takashi Iwai | 230323d | 2016-01-21 17:19:31 +0100 | [diff] [blame] | 531 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 532 | if ((timeri->flags & SNDRV_TIMER_IFLG_RUNNING) && |
| 533 | !(--timer->running)) { |
| 534 | timer->hw.stop(timer); |
| 535 | if (timer->flags & SNDRV_TIMER_FLG_RESCHED) { |
| 536 | timer->flags &= ~SNDRV_TIMER_FLG_RESCHED; |
| 537 | snd_timer_reschedule(timer, 0); |
| 538 | if (timer->flags & SNDRV_TIMER_FLG_CHANGE) { |
| 539 | timer->flags &= ~SNDRV_TIMER_FLG_CHANGE; |
| 540 | timer->hw.start(timer); |
| 541 | } |
| 542 | } |
| 543 | } |
Takashi Iwai | c3b1681 | 2016-01-14 17:01:46 +0100 | [diff] [blame] | 544 | timeri->flags &= ~(SNDRV_TIMER_IFLG_RUNNING | SNDRV_TIMER_IFLG_START); |
Takashi Iwai | 9f8a765 | 2016-09-07 15:45:31 +0200 | [diff] [blame] | 545 | if (stop) |
| 546 | timeri->flags &= ~SNDRV_TIMER_IFLG_PAUSED; |
| 547 | else |
| 548 | timeri->flags |= SNDRV_TIMER_IFLG_PAUSED; |
Takashi Iwai | f65e0d2 | 2016-02-10 12:47:03 +0100 | [diff] [blame] | 549 | snd_timer_notify1(timeri, stop ? SNDRV_TIMER_EVENT_STOP : |
| 550 | SNDRV_TIMER_EVENT_CONTINUE); |
| 551 | unlock: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 552 | spin_unlock_irqrestore(&timer->lock, flags); |
Takashi Iwai | f65e0d2 | 2016-02-10 12:47:03 +0100 | [diff] [blame] | 553 | return result; |
| 554 | } |
| 555 | |
| 556 | /* stop/pause a slave timer */ |
| 557 | static int snd_timer_stop_slave(struct snd_timer_instance *timeri, bool stop) |
| 558 | { |
| 559 | unsigned long flags; |
| 560 | |
| 561 | spin_lock_irqsave(&slave_active_lock, flags); |
| 562 | if (!(timeri->flags & SNDRV_TIMER_IFLG_RUNNING)) { |
| 563 | spin_unlock_irqrestore(&slave_active_lock, flags); |
| 564 | return -EBUSY; |
| 565 | } |
| 566 | timeri->flags &= ~SNDRV_TIMER_IFLG_RUNNING; |
| 567 | if (timeri->timer) { |
| 568 | spin_lock(&timeri->timer->lock); |
| 569 | list_del_init(&timeri->ack_list); |
| 570 | list_del_init(&timeri->active_list); |
| 571 | snd_timer_notify1(timeri, stop ? SNDRV_TIMER_EVENT_STOP : |
| 572 | SNDRV_TIMER_EVENT_CONTINUE); |
| 573 | spin_unlock(&timeri->timer->lock); |
| 574 | } |
| 575 | spin_unlock_irqrestore(&slave_active_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 576 | return 0; |
| 577 | } |
| 578 | |
| 579 | /* |
Takashi Iwai | f65e0d2 | 2016-02-10 12:47:03 +0100 | [diff] [blame] | 580 | * start the timer instance |
| 581 | */ |
| 582 | int snd_timer_start(struct snd_timer_instance *timeri, unsigned int ticks) |
| 583 | { |
| 584 | if (timeri == NULL || ticks < 1) |
| 585 | return -EINVAL; |
| 586 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) |
| 587 | return snd_timer_start_slave(timeri, true); |
| 588 | else |
| 589 | return snd_timer_start1(timeri, true, ticks); |
| 590 | } |
| 591 | |
| 592 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 593 | * stop the timer instance. |
| 594 | * |
| 595 | * do not call this from the timer callback! |
| 596 | */ |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 597 | int snd_timer_stop(struct snd_timer_instance *timeri) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | { |
Takashi Iwai | f65e0d2 | 2016-02-10 12:47:03 +0100 | [diff] [blame] | 599 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) |
| 600 | return snd_timer_stop_slave(timeri, true); |
| 601 | else |
| 602 | return snd_timer_stop1(timeri, true); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 603 | } |
| 604 | |
| 605 | /* |
| 606 | * start again.. the tick is kept. |
| 607 | */ |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 608 | int snd_timer_continue(struct snd_timer_instance *timeri) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 609 | { |
Takashi Iwai | 9f8a765 | 2016-09-07 15:45:31 +0200 | [diff] [blame] | 610 | /* timer can continue only after pause */ |
| 611 | if (!(timeri->flags & SNDRV_TIMER_IFLG_PAUSED)) |
| 612 | return -EINVAL; |
| 613 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 614 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) |
Takashi Iwai | f65e0d2 | 2016-02-10 12:47:03 +0100 | [diff] [blame] | 615 | return snd_timer_start_slave(timeri, false); |
| 616 | else |
| 617 | return snd_timer_start1(timeri, false, 0); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 618 | } |
| 619 | |
| 620 | /* |
| 621 | * pause.. remember the ticks left |
| 622 | */ |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 623 | int snd_timer_pause(struct snd_timer_instance * timeri) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 624 | { |
Takashi Iwai | f65e0d2 | 2016-02-10 12:47:03 +0100 | [diff] [blame] | 625 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) |
| 626 | return snd_timer_stop_slave(timeri, false); |
| 627 | else |
| 628 | return snd_timer_stop1(timeri, false); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 629 | } |
| 630 | |
| 631 | /* |
| 632 | * reschedule the timer |
| 633 | * |
| 634 | * start pending instances and check the scheduling ticks. |
| 635 | * when the scheduling ticks is changed set CHANGE flag to reprogram the timer. |
| 636 | */ |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 637 | static void snd_timer_reschedule(struct snd_timer * timer, unsigned long ticks_left) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 638 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 639 | struct snd_timer_instance *ti; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 640 | unsigned long ticks = ~0UL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 641 | |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 642 | list_for_each_entry(ti, &timer->active_list_head, active_list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 643 | if (ti->flags & SNDRV_TIMER_IFLG_START) { |
| 644 | ti->flags &= ~SNDRV_TIMER_IFLG_START; |
| 645 | ti->flags |= SNDRV_TIMER_IFLG_RUNNING; |
| 646 | timer->running++; |
| 647 | } |
| 648 | if (ti->flags & SNDRV_TIMER_IFLG_RUNNING) { |
| 649 | if (ticks > ti->cticks) |
| 650 | ticks = ti->cticks; |
| 651 | } |
| 652 | } |
| 653 | if (ticks == ~0UL) { |
| 654 | timer->flags &= ~SNDRV_TIMER_FLG_RESCHED; |
| 655 | return; |
| 656 | } |
| 657 | if (ticks > timer->hw.ticks) |
| 658 | ticks = timer->hw.ticks; |
| 659 | if (ticks_left != ticks) |
| 660 | timer->flags |= SNDRV_TIMER_FLG_CHANGE; |
| 661 | timer->sticks = ticks; |
| 662 | } |
| 663 | |
| 664 | /* |
| 665 | * timer tasklet |
| 666 | * |
| 667 | */ |
| 668 | static void snd_timer_tasklet(unsigned long arg) |
| 669 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 670 | struct snd_timer *timer = (struct snd_timer *) arg; |
| 671 | struct snd_timer_instance *ti; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | struct list_head *p; |
| 673 | unsigned long resolution, ticks; |
Takashi Iwai | 2999ff5 | 2006-07-05 17:16:58 +0200 | [diff] [blame] | 674 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 675 | |
Takashi Iwai | 230323d | 2016-01-21 17:19:31 +0100 | [diff] [blame] | 676 | if (timer->card && timer->card->shutdown) |
| 677 | return; |
| 678 | |
Takashi Iwai | 2999ff5 | 2006-07-05 17:16:58 +0200 | [diff] [blame] | 679 | spin_lock_irqsave(&timer->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 680 | /* now process all callbacks */ |
| 681 | while (!list_empty(&timer->sack_list_head)) { |
| 682 | p = timer->sack_list_head.next; /* get first item */ |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 683 | ti = list_entry(p, struct snd_timer_instance, ack_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 684 | |
| 685 | /* remove from ack_list and make empty */ |
| 686 | list_del_init(p); |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 687 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 688 | ticks = ti->pticks; |
| 689 | ti->pticks = 0; |
| 690 | resolution = ti->resolution; |
| 691 | |
| 692 | ti->flags |= SNDRV_TIMER_IFLG_CALLBACK; |
| 693 | spin_unlock(&timer->lock); |
| 694 | if (ti->callback) |
| 695 | ti->callback(ti, resolution, ticks); |
| 696 | spin_lock(&timer->lock); |
| 697 | ti->flags &= ~SNDRV_TIMER_IFLG_CALLBACK; |
| 698 | } |
Takashi Iwai | 2999ff5 | 2006-07-05 17:16:58 +0200 | [diff] [blame] | 699 | spin_unlock_irqrestore(&timer->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 700 | } |
| 701 | |
| 702 | /* |
| 703 | * timer interrupt |
| 704 | * |
| 705 | * ticks_left is usually equal to timer->sticks. |
| 706 | * |
| 707 | */ |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 708 | void snd_timer_interrupt(struct snd_timer * timer, unsigned long ticks_left) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 709 | { |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 710 | struct snd_timer_instance *ti, *ts, *tmp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | unsigned long resolution, ticks; |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 712 | struct list_head *p, *ack_list_head; |
Takashi Iwai | b32425a | 2005-11-18 18:52:14 +0100 | [diff] [blame] | 713 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 714 | int use_tasklet = 0; |
| 715 | |
| 716 | if (timer == NULL) |
| 717 | return; |
| 718 | |
Takashi Iwai | 230323d | 2016-01-21 17:19:31 +0100 | [diff] [blame] | 719 | if (timer->card && timer->card->shutdown) |
| 720 | return; |
| 721 | |
Takashi Iwai | b32425a | 2005-11-18 18:52:14 +0100 | [diff] [blame] | 722 | spin_lock_irqsave(&timer->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 723 | |
| 724 | /* remember the current resolution */ |
| 725 | if (timer->hw.c_resolution) |
| 726 | resolution = timer->hw.c_resolution(timer); |
| 727 | else |
| 728 | resolution = timer->hw.resolution; |
| 729 | |
| 730 | /* loop for all active instances |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 731 | * Here we cannot use list_for_each_entry because the active_list of a |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 732 | * processed instance is relinked to done_list_head before the callback |
| 733 | * is called. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 734 | */ |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 735 | list_for_each_entry_safe(ti, tmp, &timer->active_list_head, |
| 736 | active_list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 737 | if (!(ti->flags & SNDRV_TIMER_IFLG_RUNNING)) |
| 738 | continue; |
| 739 | ti->pticks += ticks_left; |
| 740 | ti->resolution = resolution; |
| 741 | if (ti->cticks < ticks_left) |
| 742 | ti->cticks = 0; |
| 743 | else |
| 744 | ti->cticks -= ticks_left; |
| 745 | if (ti->cticks) /* not expired */ |
| 746 | continue; |
| 747 | if (ti->flags & SNDRV_TIMER_IFLG_AUTO) { |
| 748 | ti->cticks = ti->ticks; |
| 749 | } else { |
| 750 | ti->flags &= ~SNDRV_TIMER_IFLG_RUNNING; |
Takashi Iwai | 094fd3b | 2016-02-04 17:06:13 +0100 | [diff] [blame] | 751 | --timer->running; |
| 752 | list_del_init(&ti->active_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 753 | } |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 754 | if ((timer->hw.flags & SNDRV_TIMER_HW_TASKLET) || |
| 755 | (ti->flags & SNDRV_TIMER_IFLG_FAST)) |
| 756 | ack_list_head = &timer->ack_list_head; |
| 757 | else |
| 758 | ack_list_head = &timer->sack_list_head; |
| 759 | if (list_empty(&ti->ack_list)) |
| 760 | list_add_tail(&ti->ack_list, ack_list_head); |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 761 | list_for_each_entry(ts, &ti->slave_active_head, active_list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 762 | ts->pticks = ti->pticks; |
| 763 | ts->resolution = resolution; |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 764 | if (list_empty(&ts->ack_list)) |
| 765 | list_add_tail(&ts->ack_list, ack_list_head); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 766 | } |
| 767 | } |
| 768 | if (timer->flags & SNDRV_TIMER_FLG_RESCHED) |
Clemens Ladisch | cd93fe4 | 2006-07-17 16:53:57 +0200 | [diff] [blame] | 769 | snd_timer_reschedule(timer, timer->sticks); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 770 | if (timer->running) { |
| 771 | if (timer->hw.flags & SNDRV_TIMER_HW_STOP) { |
| 772 | timer->hw.stop(timer); |
| 773 | timer->flags |= SNDRV_TIMER_FLG_CHANGE; |
| 774 | } |
| 775 | if (!(timer->hw.flags & SNDRV_TIMER_HW_AUTO) || |
| 776 | (timer->flags & SNDRV_TIMER_FLG_CHANGE)) { |
| 777 | /* restart timer */ |
| 778 | timer->flags &= ~SNDRV_TIMER_FLG_CHANGE; |
| 779 | timer->hw.start(timer); |
| 780 | } |
| 781 | } else { |
| 782 | timer->hw.stop(timer); |
| 783 | } |
| 784 | |
| 785 | /* now process all fast callbacks */ |
| 786 | while (!list_empty(&timer->ack_list_head)) { |
| 787 | p = timer->ack_list_head.next; /* get first item */ |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 788 | ti = list_entry(p, struct snd_timer_instance, ack_list); |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 789 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 790 | /* remove from ack_list and make empty */ |
| 791 | list_del_init(p); |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 792 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 793 | ticks = ti->pticks; |
| 794 | ti->pticks = 0; |
| 795 | |
| 796 | ti->flags |= SNDRV_TIMER_IFLG_CALLBACK; |
| 797 | spin_unlock(&timer->lock); |
| 798 | if (ti->callback) |
| 799 | ti->callback(ti, resolution, ticks); |
| 800 | spin_lock(&timer->lock); |
| 801 | ti->flags &= ~SNDRV_TIMER_IFLG_CALLBACK; |
| 802 | } |
| 803 | |
| 804 | /* do we have any slow callbacks? */ |
| 805 | use_tasklet = !list_empty(&timer->sack_list_head); |
Takashi Iwai | b32425a | 2005-11-18 18:52:14 +0100 | [diff] [blame] | 806 | spin_unlock_irqrestore(&timer->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | |
| 808 | if (use_tasklet) |
Takashi Iwai | 1f04128 | 2008-12-18 12:17:55 +0100 | [diff] [blame] | 809 | tasklet_schedule(&timer->task_queue); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 810 | } |
| 811 | |
| 812 | /* |
| 813 | |
| 814 | */ |
| 815 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 816 | int snd_timer_new(struct snd_card *card, char *id, struct snd_timer_id *tid, |
| 817 | struct snd_timer **rtimer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 818 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 819 | struct snd_timer *timer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 820 | int err; |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 821 | static struct snd_device_ops ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 822 | .dev_free = snd_timer_dev_free, |
| 823 | .dev_register = snd_timer_dev_register, |
Takashi Iwai | c461482 | 2006-06-23 14:38:23 +0200 | [diff] [blame] | 824 | .dev_disconnect = snd_timer_dev_disconnect, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 825 | }; |
| 826 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 827 | if (snd_BUG_ON(!tid)) |
| 828 | return -EINVAL; |
| 829 | if (rtimer) |
| 830 | *rtimer = NULL; |
Takashi Iwai | ca2c096 | 2005-09-09 14:20:23 +0200 | [diff] [blame] | 831 | timer = kzalloc(sizeof(*timer), GFP_KERNEL); |
Takashi Iwai | ec0e993 | 2015-03-10 15:42:14 +0100 | [diff] [blame] | 832 | if (!timer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 833 | return -ENOMEM; |
| 834 | timer->tmr_class = tid->dev_class; |
| 835 | timer->card = card; |
| 836 | timer->tmr_device = tid->device; |
| 837 | timer->tmr_subdevice = tid->subdevice; |
| 838 | if (id) |
| 839 | strlcpy(timer->id, id, sizeof(timer->id)); |
Vegard Nossum | 6b760bb | 2016-08-29 00:33:50 +0200 | [diff] [blame] | 840 | timer->sticks = 1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 841 | INIT_LIST_HEAD(&timer->device_list); |
| 842 | INIT_LIST_HEAD(&timer->open_list_head); |
| 843 | INIT_LIST_HEAD(&timer->active_list_head); |
| 844 | INIT_LIST_HEAD(&timer->ack_list_head); |
| 845 | INIT_LIST_HEAD(&timer->sack_list_head); |
| 846 | spin_lock_init(&timer->lock); |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 847 | tasklet_init(&timer->task_queue, snd_timer_tasklet, |
| 848 | (unsigned long)timer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 849 | if (card != NULL) { |
Clemens Ladisch | de24214 | 2005-10-12 17:12:31 +0200 | [diff] [blame] | 850 | timer->module = card->module; |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 851 | err = snd_device_new(card, SNDRV_DEV_TIMER, timer, &ops); |
| 852 | if (err < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 853 | snd_timer_free(timer); |
| 854 | return err; |
| 855 | } |
| 856 | } |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 857 | if (rtimer) |
| 858 | *rtimer = timer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 859 | return 0; |
| 860 | } |
| 861 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 862 | static int snd_timer_free(struct snd_timer *timer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 863 | { |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 864 | if (!timer) |
| 865 | return 0; |
Takashi Iwai | c461482 | 2006-06-23 14:38:23 +0200 | [diff] [blame] | 866 | |
| 867 | mutex_lock(®ister_mutex); |
| 868 | if (! list_empty(&timer->open_list_head)) { |
| 869 | struct list_head *p, *n; |
| 870 | struct snd_timer_instance *ti; |
Takashi Iwai | cf74dcf | 2014-02-04 18:22:39 +0100 | [diff] [blame] | 871 | pr_warn("ALSA: timer %p is busy?\n", timer); |
Takashi Iwai | c461482 | 2006-06-23 14:38:23 +0200 | [diff] [blame] | 872 | list_for_each_safe(p, n, &timer->open_list_head) { |
| 873 | list_del_init(p); |
| 874 | ti = list_entry(p, struct snd_timer_instance, open_list); |
| 875 | ti->timer = NULL; |
| 876 | } |
| 877 | } |
| 878 | list_del(&timer->device_list); |
| 879 | mutex_unlock(®ister_mutex); |
| 880 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 881 | if (timer->private_free) |
| 882 | timer->private_free(timer); |
| 883 | kfree(timer); |
| 884 | return 0; |
| 885 | } |
| 886 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 887 | static int snd_timer_dev_free(struct snd_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 888 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 889 | struct snd_timer *timer = device->device_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 890 | return snd_timer_free(timer); |
| 891 | } |
| 892 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 893 | static int snd_timer_dev_register(struct snd_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 894 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 895 | struct snd_timer *timer = dev->device_data; |
| 896 | struct snd_timer *timer1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 897 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 898 | if (snd_BUG_ON(!timer || !timer->hw.start || !timer->hw.stop)) |
| 899 | return -ENXIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 900 | if (!(timer->hw.flags & SNDRV_TIMER_HW_SLAVE) && |
| 901 | !timer->hw.resolution && timer->hw.c_resolution == NULL) |
| 902 | return -EINVAL; |
| 903 | |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 904 | mutex_lock(®ister_mutex); |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 905 | list_for_each_entry(timer1, &snd_timer_list, device_list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 906 | if (timer1->tmr_class > timer->tmr_class) |
| 907 | break; |
| 908 | if (timer1->tmr_class < timer->tmr_class) |
| 909 | continue; |
| 910 | if (timer1->card && timer->card) { |
| 911 | if (timer1->card->number > timer->card->number) |
| 912 | break; |
| 913 | if (timer1->card->number < timer->card->number) |
| 914 | continue; |
| 915 | } |
| 916 | if (timer1->tmr_device > timer->tmr_device) |
| 917 | break; |
| 918 | if (timer1->tmr_device < timer->tmr_device) |
| 919 | continue; |
| 920 | if (timer1->tmr_subdevice > timer->tmr_subdevice) |
| 921 | break; |
| 922 | if (timer1->tmr_subdevice < timer->tmr_subdevice) |
| 923 | continue; |
| 924 | /* conflicts.. */ |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 925 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 926 | return -EBUSY; |
| 927 | } |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 928 | list_add_tail(&timer->device_list, &timer1->device_list); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 929 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 930 | return 0; |
| 931 | } |
| 932 | |
Takashi Iwai | c461482 | 2006-06-23 14:38:23 +0200 | [diff] [blame] | 933 | static int snd_timer_dev_disconnect(struct snd_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 934 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 935 | struct snd_timer *timer = device->device_data; |
Takashi Iwai | 230323d | 2016-01-21 17:19:31 +0100 | [diff] [blame] | 936 | struct snd_timer_instance *ti; |
| 937 | |
Takashi Iwai | c461482 | 2006-06-23 14:38:23 +0200 | [diff] [blame] | 938 | mutex_lock(®ister_mutex); |
| 939 | list_del_init(&timer->device_list); |
Takashi Iwai | 230323d | 2016-01-21 17:19:31 +0100 | [diff] [blame] | 940 | /* wake up pending sleepers */ |
| 941 | list_for_each_entry(ti, &timer->open_list_head, open_list) { |
Takashi Iwai | 40ed9444 | 2016-01-21 17:43:08 +0100 | [diff] [blame] | 942 | if (ti->disconnect) |
| 943 | ti->disconnect(ti); |
Takashi Iwai | 230323d | 2016-01-21 17:19:31 +0100 | [diff] [blame] | 944 | } |
Takashi Iwai | c461482 | 2006-06-23 14:38:23 +0200 | [diff] [blame] | 945 | mutex_unlock(®ister_mutex); |
| 946 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 947 | } |
| 948 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 949 | void snd_timer_notify(struct snd_timer *timer, int event, struct timespec *tstamp) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 950 | { |
| 951 | unsigned long flags; |
| 952 | unsigned long resolution = 0; |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 953 | struct snd_timer_instance *ti, *ts; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 954 | |
Takashi Iwai | 230323d | 2016-01-21 17:19:31 +0100 | [diff] [blame] | 955 | if (timer->card && timer->card->shutdown) |
| 956 | return; |
Takashi Iwai | 7c22f1a | 2005-10-10 11:46:31 +0200 | [diff] [blame] | 957 | if (! (timer->hw.flags & SNDRV_TIMER_HW_SLAVE)) |
| 958 | return; |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 959 | if (snd_BUG_ON(event < SNDRV_TIMER_EVENT_MSTART || |
| 960 | event > SNDRV_TIMER_EVENT_MRESUME)) |
| 961 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 962 | spin_lock_irqsave(&timer->lock, flags); |
Jaroslav Kysela | a501dfa | 2005-08-16 11:09:05 +0200 | [diff] [blame] | 963 | if (event == SNDRV_TIMER_EVENT_MSTART || |
| 964 | event == SNDRV_TIMER_EVENT_MCONTINUE || |
| 965 | event == SNDRV_TIMER_EVENT_MRESUME) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 966 | if (timer->hw.c_resolution) |
| 967 | resolution = timer->hw.c_resolution(timer); |
| 968 | else |
| 969 | resolution = timer->hw.resolution; |
| 970 | } |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 971 | list_for_each_entry(ti, &timer->active_list_head, active_list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 972 | if (ti->ccallback) |
| 973 | ti->ccallback(ti, event, tstamp, resolution); |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 974 | list_for_each_entry(ts, &ti->slave_active_head, active_list) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 975 | if (ts->ccallback) |
| 976 | ts->ccallback(ts, event, tstamp, resolution); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 977 | } |
| 978 | spin_unlock_irqrestore(&timer->lock, flags); |
| 979 | } |
| 980 | |
| 981 | /* |
| 982 | * exported functions for global timers |
| 983 | */ |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 984 | int snd_timer_global_new(char *id, int device, struct snd_timer **rtimer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 985 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 986 | struct snd_timer_id tid; |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 987 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 988 | tid.dev_class = SNDRV_TIMER_CLASS_GLOBAL; |
| 989 | tid.dev_sclass = SNDRV_TIMER_SCLASS_NONE; |
| 990 | tid.card = -1; |
| 991 | tid.device = device; |
| 992 | tid.subdevice = 0; |
| 993 | return snd_timer_new(NULL, id, &tid, rtimer); |
| 994 | } |
| 995 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 996 | int snd_timer_global_free(struct snd_timer *timer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 997 | { |
| 998 | return snd_timer_free(timer); |
| 999 | } |
| 1000 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1001 | int snd_timer_global_register(struct snd_timer *timer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1002 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1003 | struct snd_device dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1004 | |
| 1005 | memset(&dev, 0, sizeof(dev)); |
| 1006 | dev.device_data = timer; |
| 1007 | return snd_timer_dev_register(&dev); |
| 1008 | } |
| 1009 | |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1010 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1011 | * System timer |
| 1012 | */ |
| 1013 | |
| 1014 | struct snd_timer_system_private { |
| 1015 | struct timer_list tlist; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1016 | unsigned long last_expires; |
| 1017 | unsigned long last_jiffies; |
| 1018 | unsigned long correction; |
| 1019 | }; |
| 1020 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1021 | static void snd_timer_s_function(unsigned long data) |
| 1022 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1023 | struct snd_timer *timer = (struct snd_timer *)data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1024 | struct snd_timer_system_private *priv = timer->private_data; |
| 1025 | unsigned long jiff = jiffies; |
| 1026 | if (time_after(jiff, priv->last_expires)) |
Clemens Ladisch | 6ed5eff | 2006-07-17 16:51:37 +0200 | [diff] [blame] | 1027 | priv->correction += (long)jiff - (long)priv->last_expires; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1028 | snd_timer_interrupt(timer, (long)jiff - (long)priv->last_jiffies); |
| 1029 | } |
| 1030 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1031 | static int snd_timer_s_start(struct snd_timer * timer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1032 | { |
| 1033 | struct snd_timer_system_private *priv; |
| 1034 | unsigned long njiff; |
| 1035 | |
| 1036 | priv = (struct snd_timer_system_private *) timer->private_data; |
| 1037 | njiff = (priv->last_jiffies = jiffies); |
| 1038 | if (priv->correction > timer->sticks - 1) { |
| 1039 | priv->correction -= timer->sticks - 1; |
| 1040 | njiff++; |
| 1041 | } else { |
| 1042 | njiff += timer->sticks - priv->correction; |
Clemens Ladisch | 17f48ec | 2006-07-17 16:50:56 +0200 | [diff] [blame] | 1043 | priv->correction = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1044 | } |
Takashi Iwai | 4a07083 | 2016-04-01 12:28:16 +0200 | [diff] [blame] | 1045 | priv->last_expires = njiff; |
| 1046 | mod_timer(&priv->tlist, njiff); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1047 | return 0; |
| 1048 | } |
| 1049 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1050 | static int snd_timer_s_stop(struct snd_timer * timer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1051 | { |
| 1052 | struct snd_timer_system_private *priv; |
| 1053 | unsigned long jiff; |
| 1054 | |
| 1055 | priv = (struct snd_timer_system_private *) timer->private_data; |
| 1056 | del_timer(&priv->tlist); |
| 1057 | jiff = jiffies; |
| 1058 | if (time_before(jiff, priv->last_expires)) |
| 1059 | timer->sticks = priv->last_expires - jiff; |
| 1060 | else |
| 1061 | timer->sticks = 1; |
Clemens Ladisch | de2696d | 2006-07-17 16:52:09 +0200 | [diff] [blame] | 1062 | priv->correction = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1063 | return 0; |
| 1064 | } |
| 1065 | |
Takashi Iwai | f146357 | 2016-02-02 14:14:10 +0100 | [diff] [blame] | 1066 | static int snd_timer_s_close(struct snd_timer *timer) |
| 1067 | { |
| 1068 | struct snd_timer_system_private *priv; |
| 1069 | |
| 1070 | priv = (struct snd_timer_system_private *)timer->private_data; |
| 1071 | del_timer_sync(&priv->tlist); |
| 1072 | return 0; |
| 1073 | } |
| 1074 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1075 | static struct snd_timer_hardware snd_timer_system = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1076 | { |
| 1077 | .flags = SNDRV_TIMER_HW_FIRST | SNDRV_TIMER_HW_TASKLET, |
| 1078 | .resolution = 1000000000L / HZ, |
| 1079 | .ticks = 10000000L, |
Takashi Iwai | f146357 | 2016-02-02 14:14:10 +0100 | [diff] [blame] | 1080 | .close = snd_timer_s_close, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1081 | .start = snd_timer_s_start, |
| 1082 | .stop = snd_timer_s_stop |
| 1083 | }; |
| 1084 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1085 | static void snd_timer_free_system(struct snd_timer *timer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1086 | { |
| 1087 | kfree(timer->private_data); |
| 1088 | } |
| 1089 | |
| 1090 | static int snd_timer_register_system(void) |
| 1091 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1092 | struct snd_timer *timer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1093 | struct snd_timer_system_private *priv; |
| 1094 | int err; |
| 1095 | |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1096 | err = snd_timer_global_new("system", SNDRV_TIMER_GLOBAL_SYSTEM, &timer); |
| 1097 | if (err < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1098 | return err; |
| 1099 | strcpy(timer->name, "system timer"); |
| 1100 | timer->hw = snd_timer_system; |
Takashi Iwai | ca2c096 | 2005-09-09 14:20:23 +0200 | [diff] [blame] | 1101 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1102 | if (priv == NULL) { |
| 1103 | snd_timer_free(timer); |
| 1104 | return -ENOMEM; |
| 1105 | } |
Takashi Iwai | f169c10 | 2015-01-19 11:26:25 +0100 | [diff] [blame] | 1106 | setup_timer(&priv->tlist, snd_timer_s_function, (unsigned long) timer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1107 | timer->private_data = priv; |
| 1108 | timer->private_free = snd_timer_free_system; |
| 1109 | return snd_timer_global_register(timer); |
| 1110 | } |
| 1111 | |
Jie Yang | cd6a650 | 2015-05-27 19:45:45 +0800 | [diff] [blame] | 1112 | #ifdef CONFIG_SND_PROC_FS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1113 | /* |
| 1114 | * Info interface |
| 1115 | */ |
| 1116 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1117 | static void snd_timer_proc_read(struct snd_info_entry *entry, |
| 1118 | struct snd_info_buffer *buffer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1119 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1120 | struct snd_timer *timer; |
| 1121 | struct snd_timer_instance *ti; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1122 | |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 1123 | mutex_lock(®ister_mutex); |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 1124 | list_for_each_entry(timer, &snd_timer_list, device_list) { |
Meng Wang | 42c3ac4 | 2016-09-02 10:01:50 +0800 | [diff] [blame] | 1125 | if (timer->card == NULL) { |
| 1126 | pr_debug("%s: timer->card is NULL\n", __func__); |
| 1127 | continue; |
| 1128 | } |
| 1129 | if (timer->card->shutdown) |
Takashi Iwai | 230323d | 2016-01-21 17:19:31 +0100 | [diff] [blame] | 1130 | continue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1131 | switch (timer->tmr_class) { |
| 1132 | case SNDRV_TIMER_CLASS_GLOBAL: |
| 1133 | snd_iprintf(buffer, "G%i: ", timer->tmr_device); |
| 1134 | break; |
| 1135 | case SNDRV_TIMER_CLASS_CARD: |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1136 | snd_iprintf(buffer, "C%i-%i: ", |
| 1137 | timer->card->number, timer->tmr_device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1138 | break; |
| 1139 | case SNDRV_TIMER_CLASS_PCM: |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1140 | snd_iprintf(buffer, "P%i-%i-%i: ", timer->card->number, |
| 1141 | timer->tmr_device, timer->tmr_subdevice); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1142 | break; |
| 1143 | default: |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1144 | snd_iprintf(buffer, "?%i-%i-%i-%i: ", timer->tmr_class, |
| 1145 | timer->card ? timer->card->number : -1, |
| 1146 | timer->tmr_device, timer->tmr_subdevice); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1147 | } |
| 1148 | snd_iprintf(buffer, "%s :", timer->name); |
| 1149 | if (timer->hw.resolution) |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1150 | snd_iprintf(buffer, " %lu.%03luus (%lu ticks)", |
| 1151 | timer->hw.resolution / 1000, |
| 1152 | timer->hw.resolution % 1000, |
| 1153 | timer->hw.ticks); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1154 | if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) |
| 1155 | snd_iprintf(buffer, " SLAVE"); |
| 1156 | snd_iprintf(buffer, "\n"); |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 1157 | list_for_each_entry(ti, &timer->open_list_head, open_list) |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1158 | snd_iprintf(buffer, " Client %s : %s\n", |
| 1159 | ti->owner ? ti->owner : "unknown", |
| 1160 | ti->flags & (SNDRV_TIMER_IFLG_START | |
| 1161 | SNDRV_TIMER_IFLG_RUNNING) |
| 1162 | ? "running" : "stopped"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1163 | } |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 1164 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1165 | } |
| 1166 | |
Takashi Iwai | 6581f4e | 2006-05-17 17:14:51 +0200 | [diff] [blame] | 1167 | static struct snd_info_entry *snd_timer_proc_entry; |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 1168 | |
| 1169 | static void __init snd_timer_proc_init(void) |
| 1170 | { |
| 1171 | struct snd_info_entry *entry; |
| 1172 | |
| 1173 | entry = snd_info_create_module_entry(THIS_MODULE, "timers", NULL); |
| 1174 | if (entry != NULL) { |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 1175 | entry->c.text.read = snd_timer_proc_read; |
| 1176 | if (snd_info_register(entry) < 0) { |
| 1177 | snd_info_free_entry(entry); |
| 1178 | entry = NULL; |
| 1179 | } |
| 1180 | } |
| 1181 | snd_timer_proc_entry = entry; |
| 1182 | } |
| 1183 | |
| 1184 | static void __exit snd_timer_proc_done(void) |
| 1185 | { |
Takashi Iwai | 746d4a0 | 2006-06-23 14:37:59 +0200 | [diff] [blame] | 1186 | snd_info_free_entry(snd_timer_proc_entry); |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 1187 | } |
Jie Yang | cd6a650 | 2015-05-27 19:45:45 +0800 | [diff] [blame] | 1188 | #else /* !CONFIG_SND_PROC_FS */ |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 1189 | #define snd_timer_proc_init() |
| 1190 | #define snd_timer_proc_done() |
| 1191 | #endif |
| 1192 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1193 | /* |
| 1194 | * USER SPACE interface |
| 1195 | */ |
| 1196 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1197 | static void snd_timer_user_interrupt(struct snd_timer_instance *timeri, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1198 | unsigned long resolution, |
| 1199 | unsigned long ticks) |
| 1200 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1201 | struct snd_timer_user *tu = timeri->callback_data; |
| 1202 | struct snd_timer_read *r; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1203 | int prev; |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1204 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1205 | spin_lock(&tu->qlock); |
| 1206 | if (tu->qused > 0) { |
| 1207 | prev = tu->qtail == 0 ? tu->queue_size - 1 : tu->qtail - 1; |
| 1208 | r = &tu->queue[prev]; |
| 1209 | if (r->resolution == resolution) { |
| 1210 | r->ticks += ticks; |
| 1211 | goto __wake; |
| 1212 | } |
| 1213 | } |
| 1214 | if (tu->qused >= tu->queue_size) { |
| 1215 | tu->overrun++; |
| 1216 | } else { |
| 1217 | r = &tu->queue[tu->qtail++]; |
| 1218 | tu->qtail %= tu->queue_size; |
| 1219 | r->resolution = resolution; |
| 1220 | r->ticks = ticks; |
| 1221 | tu->qused++; |
| 1222 | } |
| 1223 | __wake: |
| 1224 | spin_unlock(&tu->qlock); |
| 1225 | kill_fasync(&tu->fasync, SIGIO, POLL_IN); |
| 1226 | wake_up(&tu->qchange_sleep); |
| 1227 | } |
| 1228 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1229 | static void snd_timer_user_append_to_tqueue(struct snd_timer_user *tu, |
| 1230 | struct snd_timer_tread *tread) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1231 | { |
| 1232 | if (tu->qused >= tu->queue_size) { |
| 1233 | tu->overrun++; |
| 1234 | } else { |
| 1235 | memcpy(&tu->tqueue[tu->qtail++], tread, sizeof(*tread)); |
| 1236 | tu->qtail %= tu->queue_size; |
| 1237 | tu->qused++; |
| 1238 | } |
| 1239 | } |
| 1240 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1241 | static void snd_timer_user_ccallback(struct snd_timer_instance *timeri, |
| 1242 | int event, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1243 | struct timespec *tstamp, |
| 1244 | unsigned long resolution) |
| 1245 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1246 | struct snd_timer_user *tu = timeri->callback_data; |
| 1247 | struct snd_timer_tread r1; |
Dan Carpenter | bfe7078 | 2010-04-28 10:29:14 +0200 | [diff] [blame] | 1248 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1249 | |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1250 | if (event >= SNDRV_TIMER_EVENT_START && |
| 1251 | event <= SNDRV_TIMER_EVENT_PAUSE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1252 | tu->tstamp = *tstamp; |
| 1253 | if ((tu->filter & (1 << event)) == 0 || !tu->tread) |
| 1254 | return; |
Kangjie Lu | 9a47e9c | 2016-05-03 16:44:20 -0400 | [diff] [blame] | 1255 | memset(&r1, 0, sizeof(r1)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1256 | r1.event = event; |
| 1257 | r1.tstamp = *tstamp; |
| 1258 | r1.val = resolution; |
Dan Carpenter | bfe7078 | 2010-04-28 10:29:14 +0200 | [diff] [blame] | 1259 | spin_lock_irqsave(&tu->qlock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1260 | snd_timer_user_append_to_tqueue(tu, &r1); |
Dan Carpenter | bfe7078 | 2010-04-28 10:29:14 +0200 | [diff] [blame] | 1261 | spin_unlock_irqrestore(&tu->qlock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1262 | kill_fasync(&tu->fasync, SIGIO, POLL_IN); |
| 1263 | wake_up(&tu->qchange_sleep); |
| 1264 | } |
| 1265 | |
Takashi Iwai | 40ed9444 | 2016-01-21 17:43:08 +0100 | [diff] [blame] | 1266 | static void snd_timer_user_disconnect(struct snd_timer_instance *timeri) |
| 1267 | { |
| 1268 | struct snd_timer_user *tu = timeri->callback_data; |
| 1269 | |
| 1270 | tu->disconnected = true; |
| 1271 | wake_up(&tu->qchange_sleep); |
| 1272 | } |
| 1273 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1274 | static void snd_timer_user_tinterrupt(struct snd_timer_instance *timeri, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1275 | unsigned long resolution, |
| 1276 | unsigned long ticks) |
| 1277 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1278 | struct snd_timer_user *tu = timeri->callback_data; |
| 1279 | struct snd_timer_tread *r, r1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1280 | struct timespec tstamp; |
| 1281 | int prev, append = 0; |
| 1282 | |
Takashi Iwai | 07799e7 | 2005-10-10 11:49:49 +0200 | [diff] [blame] | 1283 | memset(&tstamp, 0, sizeof(tstamp)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1284 | spin_lock(&tu->qlock); |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1285 | if ((tu->filter & ((1 << SNDRV_TIMER_EVENT_RESOLUTION) | |
| 1286 | (1 << SNDRV_TIMER_EVENT_TICK))) == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1287 | spin_unlock(&tu->qlock); |
| 1288 | return; |
| 1289 | } |
Jaroslav Kysela | b751eef | 2007-12-13 10:19:42 +0100 | [diff] [blame] | 1290 | if (tu->last_resolution != resolution || ticks > 0) { |
| 1291 | if (timer_tstamp_monotonic) |
Thomas Gleixner | 26204e0 | 2014-06-11 23:59:14 +0000 | [diff] [blame] | 1292 | ktime_get_ts(&tstamp); |
Jaroslav Kysela | b751eef | 2007-12-13 10:19:42 +0100 | [diff] [blame] | 1293 | else |
| 1294 | getnstimeofday(&tstamp); |
| 1295 | } |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1296 | if ((tu->filter & (1 << SNDRV_TIMER_EVENT_RESOLUTION)) && |
| 1297 | tu->last_resolution != resolution) { |
Kangjie Lu | e4ec8cc | 2016-05-03 16:44:32 -0400 | [diff] [blame] | 1298 | memset(&r1, 0, sizeof(r1)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1299 | r1.event = SNDRV_TIMER_EVENT_RESOLUTION; |
| 1300 | r1.tstamp = tstamp; |
| 1301 | r1.val = resolution; |
| 1302 | snd_timer_user_append_to_tqueue(tu, &r1); |
| 1303 | tu->last_resolution = resolution; |
| 1304 | append++; |
| 1305 | } |
| 1306 | if ((tu->filter & (1 << SNDRV_TIMER_EVENT_TICK)) == 0) |
| 1307 | goto __wake; |
| 1308 | if (ticks == 0) |
| 1309 | goto __wake; |
| 1310 | if (tu->qused > 0) { |
| 1311 | prev = tu->qtail == 0 ? tu->queue_size - 1 : tu->qtail - 1; |
| 1312 | r = &tu->tqueue[prev]; |
| 1313 | if (r->event == SNDRV_TIMER_EVENT_TICK) { |
| 1314 | r->tstamp = tstamp; |
| 1315 | r->val += ticks; |
| 1316 | append++; |
| 1317 | goto __wake; |
| 1318 | } |
| 1319 | } |
| 1320 | r1.event = SNDRV_TIMER_EVENT_TICK; |
| 1321 | r1.tstamp = tstamp; |
| 1322 | r1.val = ticks; |
| 1323 | snd_timer_user_append_to_tqueue(tu, &r1); |
| 1324 | append++; |
| 1325 | __wake: |
| 1326 | spin_unlock(&tu->qlock); |
| 1327 | if (append == 0) |
| 1328 | return; |
| 1329 | kill_fasync(&tu->fasync, SIGIO, POLL_IN); |
| 1330 | wake_up(&tu->qchange_sleep); |
| 1331 | } |
| 1332 | |
| 1333 | static int snd_timer_user_open(struct inode *inode, struct file *file) |
| 1334 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1335 | struct snd_timer_user *tu; |
Takashi Iwai | 02f4865 | 2010-04-13 11:49:04 +0200 | [diff] [blame] | 1336 | int err; |
| 1337 | |
| 1338 | err = nonseekable_open(inode, file); |
| 1339 | if (err < 0) |
| 1340 | return err; |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1341 | |
Takashi Iwai | ca2c096 | 2005-09-09 14:20:23 +0200 | [diff] [blame] | 1342 | tu = kzalloc(sizeof(*tu), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1343 | if (tu == NULL) |
| 1344 | return -ENOMEM; |
| 1345 | spin_lock_init(&tu->qlock); |
| 1346 | init_waitqueue_head(&tu->qchange_sleep); |
Takashi Iwai | af36802 | 2016-01-13 17:48:01 +0100 | [diff] [blame] | 1347 | mutex_init(&tu->ioctl_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1348 | tu->ticks = 1; |
| 1349 | tu->queue_size = 128; |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1350 | tu->queue = kmalloc(tu->queue_size * sizeof(struct snd_timer_read), |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1351 | GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1352 | if (tu->queue == NULL) { |
| 1353 | kfree(tu); |
| 1354 | return -ENOMEM; |
| 1355 | } |
| 1356 | file->private_data = tu; |
| 1357 | return 0; |
| 1358 | } |
| 1359 | |
| 1360 | static int snd_timer_user_release(struct inode *inode, struct file *file) |
| 1361 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1362 | struct snd_timer_user *tu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1363 | |
| 1364 | if (file->private_data) { |
| 1365 | tu = file->private_data; |
| 1366 | file->private_data = NULL; |
Takashi Iwai | af36802 | 2016-01-13 17:48:01 +0100 | [diff] [blame] | 1367 | mutex_lock(&tu->ioctl_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1368 | if (tu->timeri) |
| 1369 | snd_timer_close(tu->timeri); |
Takashi Iwai | af36802 | 2016-01-13 17:48:01 +0100 | [diff] [blame] | 1370 | mutex_unlock(&tu->ioctl_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1371 | kfree(tu->queue); |
| 1372 | kfree(tu->tqueue); |
| 1373 | kfree(tu); |
| 1374 | } |
| 1375 | return 0; |
| 1376 | } |
| 1377 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1378 | static void snd_timer_user_zero_id(struct snd_timer_id *id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1379 | { |
| 1380 | id->dev_class = SNDRV_TIMER_CLASS_NONE; |
| 1381 | id->dev_sclass = SNDRV_TIMER_SCLASS_NONE; |
| 1382 | id->card = -1; |
| 1383 | id->device = -1; |
| 1384 | id->subdevice = -1; |
| 1385 | } |
| 1386 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1387 | static void snd_timer_user_copy_id(struct snd_timer_id *id, struct snd_timer *timer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1388 | { |
| 1389 | id->dev_class = timer->tmr_class; |
| 1390 | id->dev_sclass = SNDRV_TIMER_SCLASS_NONE; |
| 1391 | id->card = timer->card ? timer->card->number : -1; |
| 1392 | id->device = timer->tmr_device; |
| 1393 | id->subdevice = timer->tmr_subdevice; |
| 1394 | } |
| 1395 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1396 | static int snd_timer_user_next_device(struct snd_timer_id __user *_tid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1397 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1398 | struct snd_timer_id id; |
| 1399 | struct snd_timer *timer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1400 | struct list_head *p; |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1401 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1402 | if (copy_from_user(&id, _tid, sizeof(id))) |
| 1403 | return -EFAULT; |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 1404 | mutex_lock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1405 | if (id.dev_class < 0) { /* first item */ |
| 1406 | if (list_empty(&snd_timer_list)) |
| 1407 | snd_timer_user_zero_id(&id); |
| 1408 | else { |
Clemens Ladisch | 9dfba38 | 2005-10-12 17:14:55 +0200 | [diff] [blame] | 1409 | timer = list_entry(snd_timer_list.next, |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1410 | struct snd_timer, device_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1411 | snd_timer_user_copy_id(&id, timer); |
| 1412 | } |
| 1413 | } else { |
| 1414 | switch (id.dev_class) { |
| 1415 | case SNDRV_TIMER_CLASS_GLOBAL: |
| 1416 | id.device = id.device < 0 ? 0 : id.device + 1; |
| 1417 | list_for_each(p, &snd_timer_list) { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1418 | timer = list_entry(p, struct snd_timer, device_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1419 | if (timer->tmr_class > SNDRV_TIMER_CLASS_GLOBAL) { |
| 1420 | snd_timer_user_copy_id(&id, timer); |
| 1421 | break; |
| 1422 | } |
| 1423 | if (timer->tmr_device >= id.device) { |
| 1424 | snd_timer_user_copy_id(&id, timer); |
| 1425 | break; |
| 1426 | } |
| 1427 | } |
| 1428 | if (p == &snd_timer_list) |
| 1429 | snd_timer_user_zero_id(&id); |
| 1430 | break; |
| 1431 | case SNDRV_TIMER_CLASS_CARD: |
| 1432 | case SNDRV_TIMER_CLASS_PCM: |
| 1433 | if (id.card < 0) { |
| 1434 | id.card = 0; |
| 1435 | } else { |
| 1436 | if (id.card < 0) { |
| 1437 | id.card = 0; |
| 1438 | } else { |
| 1439 | if (id.device < 0) { |
| 1440 | id.device = 0; |
| 1441 | } else { |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1442 | if (id.subdevice < 0) { |
| 1443 | id.subdevice = 0; |
| 1444 | } else { |
| 1445 | id.subdevice++; |
| 1446 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1447 | } |
| 1448 | } |
| 1449 | } |
| 1450 | list_for_each(p, &snd_timer_list) { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1451 | timer = list_entry(p, struct snd_timer, device_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1452 | if (timer->tmr_class > id.dev_class) { |
| 1453 | snd_timer_user_copy_id(&id, timer); |
| 1454 | break; |
| 1455 | } |
| 1456 | if (timer->tmr_class < id.dev_class) |
| 1457 | continue; |
| 1458 | if (timer->card->number > id.card) { |
| 1459 | snd_timer_user_copy_id(&id, timer); |
| 1460 | break; |
| 1461 | } |
| 1462 | if (timer->card->number < id.card) |
| 1463 | continue; |
| 1464 | if (timer->tmr_device > id.device) { |
| 1465 | snd_timer_user_copy_id(&id, timer); |
| 1466 | break; |
| 1467 | } |
| 1468 | if (timer->tmr_device < id.device) |
| 1469 | continue; |
| 1470 | if (timer->tmr_subdevice > id.subdevice) { |
| 1471 | snd_timer_user_copy_id(&id, timer); |
| 1472 | break; |
| 1473 | } |
| 1474 | if (timer->tmr_subdevice < id.subdevice) |
| 1475 | continue; |
| 1476 | snd_timer_user_copy_id(&id, timer); |
| 1477 | break; |
| 1478 | } |
| 1479 | if (p == &snd_timer_list) |
| 1480 | snd_timer_user_zero_id(&id); |
| 1481 | break; |
| 1482 | default: |
| 1483 | snd_timer_user_zero_id(&id); |
| 1484 | } |
| 1485 | } |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 1486 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1487 | if (copy_to_user(_tid, &id, sizeof(*_tid))) |
| 1488 | return -EFAULT; |
| 1489 | return 0; |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1490 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1491 | |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1492 | static int snd_timer_user_ginfo(struct file *file, |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1493 | struct snd_timer_ginfo __user *_ginfo) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1494 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1495 | struct snd_timer_ginfo *ginfo; |
| 1496 | struct snd_timer_id tid; |
| 1497 | struct snd_timer *t; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1498 | struct list_head *p; |
| 1499 | int err = 0; |
| 1500 | |
Li Zefan | ef44a1e | 2009-04-10 09:43:08 +0800 | [diff] [blame] | 1501 | ginfo = memdup_user(_ginfo, sizeof(*ginfo)); |
| 1502 | if (IS_ERR(ginfo)) |
| 1503 | return PTR_ERR(ginfo); |
| 1504 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1505 | tid = ginfo->tid; |
| 1506 | memset(ginfo, 0, sizeof(*ginfo)); |
| 1507 | ginfo->tid = tid; |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 1508 | mutex_lock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1509 | t = snd_timer_find(&tid); |
| 1510 | if (t != NULL) { |
| 1511 | ginfo->card = t->card ? t->card->number : -1; |
| 1512 | if (t->hw.flags & SNDRV_TIMER_HW_SLAVE) |
| 1513 | ginfo->flags |= SNDRV_TIMER_FLG_SLAVE; |
| 1514 | strlcpy(ginfo->id, t->id, sizeof(ginfo->id)); |
| 1515 | strlcpy(ginfo->name, t->name, sizeof(ginfo->name)); |
| 1516 | ginfo->resolution = t->hw.resolution; |
| 1517 | if (t->hw.resolution_min > 0) { |
| 1518 | ginfo->resolution_min = t->hw.resolution_min; |
| 1519 | ginfo->resolution_max = t->hw.resolution_max; |
| 1520 | } |
| 1521 | list_for_each(p, &t->open_list_head) { |
| 1522 | ginfo->clients++; |
| 1523 | } |
| 1524 | } else { |
| 1525 | err = -ENODEV; |
| 1526 | } |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 1527 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1528 | if (err >= 0 && copy_to_user(_ginfo, ginfo, sizeof(*ginfo))) |
| 1529 | err = -EFAULT; |
| 1530 | kfree(ginfo); |
| 1531 | return err; |
| 1532 | } |
| 1533 | |
Takashi Sakamoto | 91d2178 | 2016-03-23 08:03:59 +0900 | [diff] [blame] | 1534 | static int timer_set_gparams(struct snd_timer_gparams *gparams) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1535 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1536 | struct snd_timer *t; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1537 | int err; |
| 1538 | |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 1539 | mutex_lock(®ister_mutex); |
Takashi Sakamoto | 91d2178 | 2016-03-23 08:03:59 +0900 | [diff] [blame] | 1540 | t = snd_timer_find(&gparams->tid); |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1541 | if (!t) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1542 | err = -ENODEV; |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1543 | goto _error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1544 | } |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1545 | if (!list_empty(&t->open_list_head)) { |
| 1546 | err = -EBUSY; |
| 1547 | goto _error; |
| 1548 | } |
| 1549 | if (!t->hw.set_period) { |
| 1550 | err = -ENOSYS; |
| 1551 | goto _error; |
| 1552 | } |
Takashi Sakamoto | 91d2178 | 2016-03-23 08:03:59 +0900 | [diff] [blame] | 1553 | err = t->hw.set_period(t, gparams->period_num, gparams->period_den); |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1554 | _error: |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 1555 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1556 | return err; |
| 1557 | } |
| 1558 | |
Takashi Sakamoto | 91d2178 | 2016-03-23 08:03:59 +0900 | [diff] [blame] | 1559 | static int snd_timer_user_gparams(struct file *file, |
| 1560 | struct snd_timer_gparams __user *_gparams) |
| 1561 | { |
| 1562 | struct snd_timer_gparams gparams; |
| 1563 | |
| 1564 | if (copy_from_user(&gparams, _gparams, sizeof(gparams))) |
| 1565 | return -EFAULT; |
| 1566 | return timer_set_gparams(&gparams); |
| 1567 | } |
| 1568 | |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1569 | static int snd_timer_user_gstatus(struct file *file, |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1570 | struct snd_timer_gstatus __user *_gstatus) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1571 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1572 | struct snd_timer_gstatus gstatus; |
| 1573 | struct snd_timer_id tid; |
| 1574 | struct snd_timer *t; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1575 | int err = 0; |
| 1576 | |
| 1577 | if (copy_from_user(&gstatus, _gstatus, sizeof(gstatus))) |
| 1578 | return -EFAULT; |
| 1579 | tid = gstatus.tid; |
| 1580 | memset(&gstatus, 0, sizeof(gstatus)); |
| 1581 | gstatus.tid = tid; |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 1582 | mutex_lock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1583 | t = snd_timer_find(&tid); |
| 1584 | if (t != NULL) { |
| 1585 | if (t->hw.c_resolution) |
| 1586 | gstatus.resolution = t->hw.c_resolution(t); |
| 1587 | else |
| 1588 | gstatus.resolution = t->hw.resolution; |
| 1589 | if (t->hw.precise_resolution) { |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1590 | t->hw.precise_resolution(t, &gstatus.resolution_num, |
| 1591 | &gstatus.resolution_den); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1592 | } else { |
| 1593 | gstatus.resolution_num = gstatus.resolution; |
| 1594 | gstatus.resolution_den = 1000000000uL; |
| 1595 | } |
| 1596 | } else { |
| 1597 | err = -ENODEV; |
| 1598 | } |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 1599 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1600 | if (err >= 0 && copy_to_user(_gstatus, &gstatus, sizeof(gstatus))) |
| 1601 | err = -EFAULT; |
| 1602 | return err; |
| 1603 | } |
| 1604 | |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1605 | static int snd_timer_user_tselect(struct file *file, |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1606 | struct snd_timer_select __user *_tselect) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1607 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1608 | struct snd_timer_user *tu; |
| 1609 | struct snd_timer_select tselect; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1610 | char str[32]; |
Jaroslav Kysela | c1935b4 | 2005-04-04 16:44:58 +0200 | [diff] [blame] | 1611 | int err = 0; |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1612 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1613 | tu = file->private_data; |
Jaroslav Kysela | c1935b4 | 2005-04-04 16:44:58 +0200 | [diff] [blame] | 1614 | if (tu->timeri) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1615 | snd_timer_close(tu->timeri); |
Jaroslav Kysela | c1935b4 | 2005-04-04 16:44:58 +0200 | [diff] [blame] | 1616 | tu->timeri = NULL; |
| 1617 | } |
| 1618 | if (copy_from_user(&tselect, _tselect, sizeof(tselect))) { |
| 1619 | err = -EFAULT; |
| 1620 | goto __err; |
| 1621 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1622 | sprintf(str, "application %i", current->pid); |
| 1623 | if (tselect.id.dev_class != SNDRV_TIMER_CLASS_SLAVE) |
| 1624 | tselect.id.dev_sclass = SNDRV_TIMER_SCLASS_APPLICATION; |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1625 | err = snd_timer_open(&tu->timeri, str, &tselect.id, current->pid); |
| 1626 | if (err < 0) |
Jaroslav Kysela | c1935b4 | 2005-04-04 16:44:58 +0200 | [diff] [blame] | 1627 | goto __err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1628 | |
Jesper Juhl | 4d57277 | 2005-05-30 17:30:32 +0200 | [diff] [blame] | 1629 | kfree(tu->queue); |
| 1630 | tu->queue = NULL; |
| 1631 | kfree(tu->tqueue); |
| 1632 | tu->tqueue = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1633 | if (tu->tread) { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1634 | tu->tqueue = kmalloc(tu->queue_size * sizeof(struct snd_timer_tread), |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1635 | GFP_KERNEL); |
Jaroslav Kysela | c1935b4 | 2005-04-04 16:44:58 +0200 | [diff] [blame] | 1636 | if (tu->tqueue == NULL) |
| 1637 | err = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1638 | } else { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1639 | tu->queue = kmalloc(tu->queue_size * sizeof(struct snd_timer_read), |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1640 | GFP_KERNEL); |
Jaroslav Kysela | c1935b4 | 2005-04-04 16:44:58 +0200 | [diff] [blame] | 1641 | if (tu->queue == NULL) |
| 1642 | err = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1643 | } |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1644 | |
Jaroslav Kysela | c1935b4 | 2005-04-04 16:44:58 +0200 | [diff] [blame] | 1645 | if (err < 0) { |
| 1646 | snd_timer_close(tu->timeri); |
| 1647 | tu->timeri = NULL; |
| 1648 | } else { |
| 1649 | tu->timeri->flags |= SNDRV_TIMER_IFLG_FAST; |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1650 | tu->timeri->callback = tu->tread |
| 1651 | ? snd_timer_user_tinterrupt : snd_timer_user_interrupt; |
Jaroslav Kysela | c1935b4 | 2005-04-04 16:44:58 +0200 | [diff] [blame] | 1652 | tu->timeri->ccallback = snd_timer_user_ccallback; |
| 1653 | tu->timeri->callback_data = (void *)tu; |
Takashi Iwai | 40ed9444 | 2016-01-21 17:43:08 +0100 | [diff] [blame] | 1654 | tu->timeri->disconnect = snd_timer_user_disconnect; |
Jaroslav Kysela | c1935b4 | 2005-04-04 16:44:58 +0200 | [diff] [blame] | 1655 | } |
| 1656 | |
| 1657 | __err: |
Jaroslav Kysela | c1935b4 | 2005-04-04 16:44:58 +0200 | [diff] [blame] | 1658 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1659 | } |
| 1660 | |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1661 | static int snd_timer_user_info(struct file *file, |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1662 | struct snd_timer_info __user *_info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1663 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1664 | struct snd_timer_user *tu; |
| 1665 | struct snd_timer_info *info; |
| 1666 | struct snd_timer *t; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1667 | int err = 0; |
| 1668 | |
| 1669 | tu = file->private_data; |
Clemens Ladisch | 7c64ec3 | 2007-07-16 11:01:30 +0200 | [diff] [blame] | 1670 | if (!tu->timeri) |
| 1671 | return -EBADFD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1672 | t = tu->timeri->timer; |
Clemens Ladisch | 7c64ec3 | 2007-07-16 11:01:30 +0200 | [diff] [blame] | 1673 | if (!t) |
| 1674 | return -EBADFD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1675 | |
Takashi Iwai | ca2c096 | 2005-09-09 14:20:23 +0200 | [diff] [blame] | 1676 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1677 | if (! info) |
| 1678 | return -ENOMEM; |
| 1679 | info->card = t->card ? t->card->number : -1; |
| 1680 | if (t->hw.flags & SNDRV_TIMER_HW_SLAVE) |
| 1681 | info->flags |= SNDRV_TIMER_FLG_SLAVE; |
| 1682 | strlcpy(info->id, t->id, sizeof(info->id)); |
| 1683 | strlcpy(info->name, t->name, sizeof(info->name)); |
| 1684 | info->resolution = t->hw.resolution; |
| 1685 | if (copy_to_user(_info, info, sizeof(*_info))) |
| 1686 | err = -EFAULT; |
| 1687 | kfree(info); |
| 1688 | return err; |
| 1689 | } |
| 1690 | |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1691 | static int snd_timer_user_params(struct file *file, |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1692 | struct snd_timer_params __user *_params) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1693 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1694 | struct snd_timer_user *tu; |
| 1695 | struct snd_timer_params params; |
| 1696 | struct snd_timer *t; |
| 1697 | struct snd_timer_read *tr; |
| 1698 | struct snd_timer_tread *ttr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1699 | int err; |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1700 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1701 | tu = file->private_data; |
Clemens Ladisch | 7c64ec3 | 2007-07-16 11:01:30 +0200 | [diff] [blame] | 1702 | if (!tu->timeri) |
| 1703 | return -EBADFD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1704 | t = tu->timeri->timer; |
Clemens Ladisch | 7c64ec3 | 2007-07-16 11:01:30 +0200 | [diff] [blame] | 1705 | if (!t) |
| 1706 | return -EBADFD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1707 | if (copy_from_user(¶ms, _params, sizeof(params))) |
| 1708 | return -EFAULT; |
Takashi Iwai | 5ac9276 | 2017-02-28 14:49:07 +0100 | [diff] [blame] | 1709 | if (!(t->hw.flags & SNDRV_TIMER_HW_SLAVE)) { |
| 1710 | u64 resolution; |
| 1711 | |
| 1712 | if (params.ticks < 1) { |
| 1713 | err = -EINVAL; |
| 1714 | goto _end; |
| 1715 | } |
| 1716 | |
| 1717 | /* Don't allow resolution less than 1ms */ |
| 1718 | resolution = snd_timer_resolution(tu->timeri); |
| 1719 | resolution *= params.ticks; |
| 1720 | if (resolution < 1000000) { |
| 1721 | err = -EINVAL; |
| 1722 | goto _end; |
| 1723 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1724 | } |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1725 | if (params.queue_size > 0 && |
| 1726 | (params.queue_size < 32 || params.queue_size > 1024)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1727 | err = -EINVAL; |
| 1728 | goto _end; |
| 1729 | } |
| 1730 | if (params.filter & ~((1<<SNDRV_TIMER_EVENT_RESOLUTION)| |
| 1731 | (1<<SNDRV_TIMER_EVENT_TICK)| |
| 1732 | (1<<SNDRV_TIMER_EVENT_START)| |
| 1733 | (1<<SNDRV_TIMER_EVENT_STOP)| |
| 1734 | (1<<SNDRV_TIMER_EVENT_CONTINUE)| |
| 1735 | (1<<SNDRV_TIMER_EVENT_PAUSE)| |
Jaroslav Kysela | a501dfa | 2005-08-16 11:09:05 +0200 | [diff] [blame] | 1736 | (1<<SNDRV_TIMER_EVENT_SUSPEND)| |
| 1737 | (1<<SNDRV_TIMER_EVENT_RESUME)| |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1738 | (1<<SNDRV_TIMER_EVENT_MSTART)| |
| 1739 | (1<<SNDRV_TIMER_EVENT_MSTOP)| |
| 1740 | (1<<SNDRV_TIMER_EVENT_MCONTINUE)| |
Jaroslav Kysela | 65d11d9 | 2005-08-16 13:05:43 +0200 | [diff] [blame] | 1741 | (1<<SNDRV_TIMER_EVENT_MPAUSE)| |
| 1742 | (1<<SNDRV_TIMER_EVENT_MSUSPEND)| |
Jaroslav Kysela | a501dfa | 2005-08-16 11:09:05 +0200 | [diff] [blame] | 1743 | (1<<SNDRV_TIMER_EVENT_MRESUME))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1744 | err = -EINVAL; |
| 1745 | goto _end; |
| 1746 | } |
| 1747 | snd_timer_stop(tu->timeri); |
| 1748 | spin_lock_irq(&t->lock); |
| 1749 | tu->timeri->flags &= ~(SNDRV_TIMER_IFLG_AUTO| |
| 1750 | SNDRV_TIMER_IFLG_EXCLUSIVE| |
| 1751 | SNDRV_TIMER_IFLG_EARLY_EVENT); |
| 1752 | if (params.flags & SNDRV_TIMER_PSFLG_AUTO) |
| 1753 | tu->timeri->flags |= SNDRV_TIMER_IFLG_AUTO; |
| 1754 | if (params.flags & SNDRV_TIMER_PSFLG_EXCLUSIVE) |
| 1755 | tu->timeri->flags |= SNDRV_TIMER_IFLG_EXCLUSIVE; |
| 1756 | if (params.flags & SNDRV_TIMER_PSFLG_EARLY_EVENT) |
| 1757 | tu->timeri->flags |= SNDRV_TIMER_IFLG_EARLY_EVENT; |
| 1758 | spin_unlock_irq(&t->lock); |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1759 | if (params.queue_size > 0 && |
| 1760 | (unsigned int)tu->queue_size != params.queue_size) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1761 | if (tu->tread) { |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1762 | ttr = kmalloc(params.queue_size * sizeof(*ttr), |
| 1763 | GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1764 | if (ttr) { |
| 1765 | kfree(tu->tqueue); |
| 1766 | tu->queue_size = params.queue_size; |
| 1767 | tu->tqueue = ttr; |
| 1768 | } |
| 1769 | } else { |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1770 | tr = kmalloc(params.queue_size * sizeof(*tr), |
| 1771 | GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1772 | if (tr) { |
| 1773 | kfree(tu->queue); |
| 1774 | tu->queue_size = params.queue_size; |
| 1775 | tu->queue = tr; |
| 1776 | } |
| 1777 | } |
| 1778 | } |
| 1779 | tu->qhead = tu->qtail = tu->qused = 0; |
| 1780 | if (tu->timeri->flags & SNDRV_TIMER_IFLG_EARLY_EVENT) { |
| 1781 | if (tu->tread) { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1782 | struct snd_timer_tread tread; |
Kangjie Lu | cec8f96 | 2016-05-03 16:44:07 -0400 | [diff] [blame] | 1783 | memset(&tread, 0, sizeof(tread)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1784 | tread.event = SNDRV_TIMER_EVENT_EARLY; |
| 1785 | tread.tstamp.tv_sec = 0; |
| 1786 | tread.tstamp.tv_nsec = 0; |
| 1787 | tread.val = 0; |
| 1788 | snd_timer_user_append_to_tqueue(tu, &tread); |
| 1789 | } else { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1790 | struct snd_timer_read *r = &tu->queue[0]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1791 | r->resolution = 0; |
| 1792 | r->ticks = 0; |
| 1793 | tu->qused++; |
| 1794 | tu->qtail++; |
| 1795 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1796 | } |
| 1797 | tu->filter = params.filter; |
| 1798 | tu->ticks = params.ticks; |
| 1799 | err = 0; |
| 1800 | _end: |
| 1801 | if (copy_to_user(_params, ¶ms, sizeof(params))) |
| 1802 | return -EFAULT; |
| 1803 | return err; |
| 1804 | } |
| 1805 | |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1806 | static int snd_timer_user_status(struct file *file, |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1807 | struct snd_timer_status __user *_status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1808 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1809 | struct snd_timer_user *tu; |
| 1810 | struct snd_timer_status status; |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1811 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1812 | tu = file->private_data; |
Clemens Ladisch | 7c64ec3 | 2007-07-16 11:01:30 +0200 | [diff] [blame] | 1813 | if (!tu->timeri) |
| 1814 | return -EBADFD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1815 | memset(&status, 0, sizeof(status)); |
| 1816 | status.tstamp = tu->tstamp; |
| 1817 | status.resolution = snd_timer_resolution(tu->timeri); |
| 1818 | status.lost = tu->timeri->lost; |
| 1819 | status.overrun = tu->overrun; |
| 1820 | spin_lock_irq(&tu->qlock); |
| 1821 | status.queue = tu->qused; |
| 1822 | spin_unlock_irq(&tu->qlock); |
| 1823 | if (copy_to_user(_status, &status, sizeof(status))) |
| 1824 | return -EFAULT; |
| 1825 | return 0; |
| 1826 | } |
| 1827 | |
| 1828 | static int snd_timer_user_start(struct file *file) |
| 1829 | { |
| 1830 | int err; |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1831 | struct snd_timer_user *tu; |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1832 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1833 | tu = file->private_data; |
Clemens Ladisch | 7c64ec3 | 2007-07-16 11:01:30 +0200 | [diff] [blame] | 1834 | if (!tu->timeri) |
| 1835 | return -EBADFD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1836 | snd_timer_stop(tu->timeri); |
| 1837 | tu->timeri->lost = 0; |
| 1838 | tu->last_resolution = 0; |
| 1839 | return (err = snd_timer_start(tu->timeri, tu->ticks)) < 0 ? err : 0; |
| 1840 | } |
| 1841 | |
| 1842 | static int snd_timer_user_stop(struct file *file) |
| 1843 | { |
| 1844 | int err; |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1845 | struct snd_timer_user *tu; |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1846 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1847 | tu = file->private_data; |
Clemens Ladisch | 7c64ec3 | 2007-07-16 11:01:30 +0200 | [diff] [blame] | 1848 | if (!tu->timeri) |
| 1849 | return -EBADFD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1850 | return (err = snd_timer_stop(tu->timeri)) < 0 ? err : 0; |
| 1851 | } |
| 1852 | |
| 1853 | static int snd_timer_user_continue(struct file *file) |
| 1854 | { |
| 1855 | int err; |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1856 | struct snd_timer_user *tu; |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1857 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1858 | tu = file->private_data; |
Clemens Ladisch | 7c64ec3 | 2007-07-16 11:01:30 +0200 | [diff] [blame] | 1859 | if (!tu->timeri) |
| 1860 | return -EBADFD; |
Takashi Iwai | 9f8a765 | 2016-09-07 15:45:31 +0200 | [diff] [blame] | 1861 | /* start timer instead of continue if it's not used before */ |
| 1862 | if (!(tu->timeri->flags & SNDRV_TIMER_IFLG_PAUSED)) |
| 1863 | return snd_timer_user_start(file); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1864 | tu->timeri->lost = 0; |
| 1865 | return (err = snd_timer_continue(tu->timeri)) < 0 ? err : 0; |
| 1866 | } |
| 1867 | |
Takashi Iwai | 15790a6 | 2005-05-15 15:04:14 +0200 | [diff] [blame] | 1868 | static int snd_timer_user_pause(struct file *file) |
| 1869 | { |
| 1870 | int err; |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1871 | struct snd_timer_user *tu; |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1872 | |
Takashi Iwai | 15790a6 | 2005-05-15 15:04:14 +0200 | [diff] [blame] | 1873 | tu = file->private_data; |
Clemens Ladisch | 7c64ec3 | 2007-07-16 11:01:30 +0200 | [diff] [blame] | 1874 | if (!tu->timeri) |
| 1875 | return -EBADFD; |
Jaroslav Kysela | d138b44 | 2005-05-16 13:51:39 +0200 | [diff] [blame] | 1876 | return (err = snd_timer_pause(tu->timeri)) < 0 ? err : 0; |
Takashi Iwai | 15790a6 | 2005-05-15 15:04:14 +0200 | [diff] [blame] | 1877 | } |
| 1878 | |
Takashi Iwai | 8c50b37 | 2005-05-15 15:43:54 +0200 | [diff] [blame] | 1879 | enum { |
| 1880 | SNDRV_TIMER_IOCTL_START_OLD = _IO('T', 0x20), |
| 1881 | SNDRV_TIMER_IOCTL_STOP_OLD = _IO('T', 0x21), |
| 1882 | SNDRV_TIMER_IOCTL_CONTINUE_OLD = _IO('T', 0x22), |
| 1883 | SNDRV_TIMER_IOCTL_PAUSE_OLD = _IO('T', 0x23), |
| 1884 | }; |
| 1885 | |
Takashi Iwai | af36802 | 2016-01-13 17:48:01 +0100 | [diff] [blame] | 1886 | static long __snd_timer_user_ioctl(struct file *file, unsigned int cmd, |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1887 | unsigned long arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1888 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1889 | struct snd_timer_user *tu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1890 | void __user *argp = (void __user *)arg; |
| 1891 | int __user *p = argp; |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1892 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1893 | tu = file->private_data; |
| 1894 | switch (cmd) { |
| 1895 | case SNDRV_TIMER_IOCTL_PVERSION: |
| 1896 | return put_user(SNDRV_TIMER_VERSION, p) ? -EFAULT : 0; |
| 1897 | case SNDRV_TIMER_IOCTL_NEXT_DEVICE: |
| 1898 | return snd_timer_user_next_device(argp); |
| 1899 | case SNDRV_TIMER_IOCTL_TREAD: |
| 1900 | { |
| 1901 | int xarg; |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1902 | |
Takashi Iwai | af36802 | 2016-01-13 17:48:01 +0100 | [diff] [blame] | 1903 | if (tu->timeri) /* too late */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1904 | return -EBUSY; |
Takashi Iwai | af36802 | 2016-01-13 17:48:01 +0100 | [diff] [blame] | 1905 | if (get_user(xarg, p)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1906 | return -EFAULT; |
| 1907 | tu->tread = xarg ? 1 : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1908 | return 0; |
| 1909 | } |
| 1910 | case SNDRV_TIMER_IOCTL_GINFO: |
| 1911 | return snd_timer_user_ginfo(file, argp); |
| 1912 | case SNDRV_TIMER_IOCTL_GPARAMS: |
| 1913 | return snd_timer_user_gparams(file, argp); |
| 1914 | case SNDRV_TIMER_IOCTL_GSTATUS: |
| 1915 | return snd_timer_user_gstatus(file, argp); |
| 1916 | case SNDRV_TIMER_IOCTL_SELECT: |
| 1917 | return snd_timer_user_tselect(file, argp); |
| 1918 | case SNDRV_TIMER_IOCTL_INFO: |
| 1919 | return snd_timer_user_info(file, argp); |
| 1920 | case SNDRV_TIMER_IOCTL_PARAMS: |
| 1921 | return snd_timer_user_params(file, argp); |
| 1922 | case SNDRV_TIMER_IOCTL_STATUS: |
| 1923 | return snd_timer_user_status(file, argp); |
| 1924 | case SNDRV_TIMER_IOCTL_START: |
Takashi Iwai | 8c50b37 | 2005-05-15 15:43:54 +0200 | [diff] [blame] | 1925 | case SNDRV_TIMER_IOCTL_START_OLD: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1926 | return snd_timer_user_start(file); |
| 1927 | case SNDRV_TIMER_IOCTL_STOP: |
Takashi Iwai | 8c50b37 | 2005-05-15 15:43:54 +0200 | [diff] [blame] | 1928 | case SNDRV_TIMER_IOCTL_STOP_OLD: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1929 | return snd_timer_user_stop(file); |
| 1930 | case SNDRV_TIMER_IOCTL_CONTINUE: |
Takashi Iwai | 8c50b37 | 2005-05-15 15:43:54 +0200 | [diff] [blame] | 1931 | case SNDRV_TIMER_IOCTL_CONTINUE_OLD: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1932 | return snd_timer_user_continue(file); |
Takashi Iwai | 15790a6 | 2005-05-15 15:04:14 +0200 | [diff] [blame] | 1933 | case SNDRV_TIMER_IOCTL_PAUSE: |
Takashi Iwai | 8c50b37 | 2005-05-15 15:43:54 +0200 | [diff] [blame] | 1934 | case SNDRV_TIMER_IOCTL_PAUSE_OLD: |
Takashi Iwai | 15790a6 | 2005-05-15 15:04:14 +0200 | [diff] [blame] | 1935 | return snd_timer_user_pause(file); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1936 | } |
| 1937 | return -ENOTTY; |
| 1938 | } |
| 1939 | |
Takashi Iwai | af36802 | 2016-01-13 17:48:01 +0100 | [diff] [blame] | 1940 | static long snd_timer_user_ioctl(struct file *file, unsigned int cmd, |
| 1941 | unsigned long arg) |
| 1942 | { |
| 1943 | struct snd_timer_user *tu = file->private_data; |
| 1944 | long ret; |
| 1945 | |
| 1946 | mutex_lock(&tu->ioctl_lock); |
| 1947 | ret = __snd_timer_user_ioctl(file, cmd, arg); |
| 1948 | mutex_unlock(&tu->ioctl_lock); |
| 1949 | return ret; |
| 1950 | } |
| 1951 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1952 | static int snd_timer_user_fasync(int fd, struct file * file, int on) |
| 1953 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1954 | struct snd_timer_user *tu; |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1955 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1956 | tu = file->private_data; |
Jonathan Corbet | 60aa492 | 2009-02-01 14:52:56 -0700 | [diff] [blame] | 1957 | return fasync_helper(fd, file, on, &tu->fasync); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1958 | } |
| 1959 | |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1960 | static ssize_t snd_timer_user_read(struct file *file, char __user *buffer, |
| 1961 | size_t count, loff_t *offset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1962 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1963 | struct snd_timer_user *tu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1964 | long result = 0, unit; |
Takashi Iwai | 4dff5c7 | 2016-02-08 17:26:58 +0100 | [diff] [blame] | 1965 | int qhead; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1966 | int err = 0; |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1967 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1968 | tu = file->private_data; |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1969 | unit = tu->tread ? sizeof(struct snd_timer_tread) : sizeof(struct snd_timer_read); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1970 | spin_lock_irq(&tu->qlock); |
| 1971 | while ((long)count - result >= unit) { |
| 1972 | while (!tu->qused) { |
| 1973 | wait_queue_t wait; |
| 1974 | |
| 1975 | if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) { |
| 1976 | err = -EAGAIN; |
Takashi Iwai | 4dff5c7 | 2016-02-08 17:26:58 +0100 | [diff] [blame] | 1977 | goto _error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1978 | } |
| 1979 | |
| 1980 | set_current_state(TASK_INTERRUPTIBLE); |
| 1981 | init_waitqueue_entry(&wait, current); |
| 1982 | add_wait_queue(&tu->qchange_sleep, &wait); |
| 1983 | |
| 1984 | spin_unlock_irq(&tu->qlock); |
| 1985 | schedule(); |
| 1986 | spin_lock_irq(&tu->qlock); |
| 1987 | |
| 1988 | remove_wait_queue(&tu->qchange_sleep, &wait); |
| 1989 | |
Takashi Iwai | 230323d | 2016-01-21 17:19:31 +0100 | [diff] [blame] | 1990 | if (tu->disconnected) { |
| 1991 | err = -ENODEV; |
Takashi Iwai | 4dff5c7 | 2016-02-08 17:26:58 +0100 | [diff] [blame] | 1992 | goto _error; |
Takashi Iwai | 230323d | 2016-01-21 17:19:31 +0100 | [diff] [blame] | 1993 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1994 | if (signal_pending(current)) { |
| 1995 | err = -ERESTARTSYS; |
Takashi Iwai | 4dff5c7 | 2016-02-08 17:26:58 +0100 | [diff] [blame] | 1996 | goto _error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1997 | } |
| 1998 | } |
| 1999 | |
Takashi Iwai | 4dff5c7 | 2016-02-08 17:26:58 +0100 | [diff] [blame] | 2000 | qhead = tu->qhead++; |
| 2001 | tu->qhead %= tu->queue_size; |
Takashi Iwai | 3fa6993 | 2016-07-04 14:02:15 +0200 | [diff] [blame] | 2002 | tu->qused--; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2003 | spin_unlock_irq(&tu->qlock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2004 | |
Vegard Nossum | 11749e0 | 2016-08-28 10:13:07 +0200 | [diff] [blame] | 2005 | mutex_lock(&tu->ioctl_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2006 | if (tu->tread) { |
Takashi Iwai | 4dff5c7 | 2016-02-08 17:26:58 +0100 | [diff] [blame] | 2007 | if (copy_to_user(buffer, &tu->tqueue[qhead], |
| 2008 | sizeof(struct snd_timer_tread))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2009 | err = -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2010 | } else { |
Takashi Iwai | 4dff5c7 | 2016-02-08 17:26:58 +0100 | [diff] [blame] | 2011 | if (copy_to_user(buffer, &tu->queue[qhead], |
| 2012 | sizeof(struct snd_timer_read))) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2013 | err = -EFAULT; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2014 | } |
Vegard Nossum | 11749e0 | 2016-08-28 10:13:07 +0200 | [diff] [blame] | 2015 | mutex_unlock(&tu->ioctl_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2016 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2017 | spin_lock_irq(&tu->qlock); |
Takashi Iwai | 4dff5c7 | 2016-02-08 17:26:58 +0100 | [diff] [blame] | 2018 | if (err < 0) |
| 2019 | goto _error; |
| 2020 | result += unit; |
| 2021 | buffer += unit; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2022 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2023 | _error: |
Takashi Iwai | 4dff5c7 | 2016-02-08 17:26:58 +0100 | [diff] [blame] | 2024 | spin_unlock_irq(&tu->qlock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2025 | return result > 0 ? result : err; |
| 2026 | } |
| 2027 | |
| 2028 | static unsigned int snd_timer_user_poll(struct file *file, poll_table * wait) |
| 2029 | { |
| 2030 | unsigned int mask; |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 2031 | struct snd_timer_user *tu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2032 | |
| 2033 | tu = file->private_data; |
| 2034 | |
| 2035 | poll_wait(file, &tu->qchange_sleep, wait); |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 2036 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2037 | mask = 0; |
| 2038 | if (tu->qused) |
| 2039 | mask |= POLLIN | POLLRDNORM; |
Takashi Iwai | 230323d | 2016-01-21 17:19:31 +0100 | [diff] [blame] | 2040 | if (tu->disconnected) |
| 2041 | mask |= POLLERR; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2042 | |
| 2043 | return mask; |
| 2044 | } |
| 2045 | |
| 2046 | #ifdef CONFIG_COMPAT |
| 2047 | #include "timer_compat.c" |
| 2048 | #else |
| 2049 | #define snd_timer_user_ioctl_compat NULL |
| 2050 | #endif |
| 2051 | |
Arjan van de Ven | 9c2e08c | 2007-02-12 00:55:37 -0800 | [diff] [blame] | 2052 | static const struct file_operations snd_timer_f_ops = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2053 | { |
| 2054 | .owner = THIS_MODULE, |
| 2055 | .read = snd_timer_user_read, |
| 2056 | .open = snd_timer_user_open, |
| 2057 | .release = snd_timer_user_release, |
Takashi Iwai | 02f4865 | 2010-04-13 11:49:04 +0200 | [diff] [blame] | 2058 | .llseek = no_llseek, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2059 | .poll = snd_timer_user_poll, |
| 2060 | .unlocked_ioctl = snd_timer_user_ioctl, |
| 2061 | .compat_ioctl = snd_timer_user_ioctl_compat, |
| 2062 | .fasync = snd_timer_user_fasync, |
| 2063 | }; |
| 2064 | |
Takashi Iwai | 7c35860 | 2015-01-29 18:09:05 +0100 | [diff] [blame] | 2065 | /* unregister the system timer */ |
| 2066 | static void snd_timer_free_all(void) |
| 2067 | { |
| 2068 | struct snd_timer *timer, *n; |
| 2069 | |
| 2070 | list_for_each_entry_safe(timer, n, &snd_timer_list, device_list) |
| 2071 | snd_timer_free(timer); |
| 2072 | } |
| 2073 | |
Takashi Iwai | 89da061 | 2015-01-29 18:12:26 +0100 | [diff] [blame] | 2074 | static struct device timer_dev; |
| 2075 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2076 | /* |
| 2077 | * ENTRY functions |
| 2078 | */ |
| 2079 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2080 | static int __init alsa_timer_init(void) |
| 2081 | { |
| 2082 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2083 | |
Takashi Iwai | 89da061 | 2015-01-29 18:12:26 +0100 | [diff] [blame] | 2084 | snd_device_initialize(&timer_dev, NULL); |
| 2085 | dev_set_name(&timer_dev, "timer"); |
| 2086 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2087 | #ifdef SNDRV_OSS_INFO_DEV_TIMERS |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 2088 | snd_oss_info_register(SNDRV_OSS_INFO_DEV_TIMERS, SNDRV_CARDS - 1, |
| 2089 | "system timer"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2090 | #endif |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 2091 | |
Takashi Iwai | 7c35860 | 2015-01-29 18:09:05 +0100 | [diff] [blame] | 2092 | err = snd_timer_register_system(); |
| 2093 | if (err < 0) { |
Takashi Iwai | cf74dcf | 2014-02-04 18:22:39 +0100 | [diff] [blame] | 2094 | pr_err("ALSA: unable to register system timer (%i)\n", err); |
Takashi Iwai | 89da061 | 2015-01-29 18:12:26 +0100 | [diff] [blame] | 2095 | put_device(&timer_dev); |
Takashi Iwai | 7c35860 | 2015-01-29 18:09:05 +0100 | [diff] [blame] | 2096 | return err; |
| 2097 | } |
| 2098 | |
Takashi Iwai | 40a4b26 | 2015-01-30 08:34:58 +0100 | [diff] [blame] | 2099 | err = snd_register_device(SNDRV_DEVICE_TYPE_TIMER, NULL, 0, |
| 2100 | &snd_timer_f_ops, NULL, &timer_dev); |
Takashi Iwai | 7c35860 | 2015-01-29 18:09:05 +0100 | [diff] [blame] | 2101 | if (err < 0) { |
Takashi Iwai | cf74dcf | 2014-02-04 18:22:39 +0100 | [diff] [blame] | 2102 | pr_err("ALSA: unable to register timer device (%i)\n", err); |
Takashi Iwai | 7c35860 | 2015-01-29 18:09:05 +0100 | [diff] [blame] | 2103 | snd_timer_free_all(); |
Takashi Iwai | 89da061 | 2015-01-29 18:12:26 +0100 | [diff] [blame] | 2104 | put_device(&timer_dev); |
Takashi Iwai | 7c35860 | 2015-01-29 18:09:05 +0100 | [diff] [blame] | 2105 | return err; |
| 2106 | } |
| 2107 | |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 2108 | snd_timer_proc_init(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2109 | return 0; |
| 2110 | } |
| 2111 | |
| 2112 | static void __exit alsa_timer_exit(void) |
| 2113 | { |
Takashi Iwai | 40a4b26 | 2015-01-30 08:34:58 +0100 | [diff] [blame] | 2114 | snd_unregister_device(&timer_dev); |
Takashi Iwai | 7c35860 | 2015-01-29 18:09:05 +0100 | [diff] [blame] | 2115 | snd_timer_free_all(); |
Takashi Iwai | 89da061 | 2015-01-29 18:12:26 +0100 | [diff] [blame] | 2116 | put_device(&timer_dev); |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 2117 | snd_timer_proc_done(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2118 | #ifdef SNDRV_OSS_INFO_DEV_TIMERS |
| 2119 | snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_TIMERS, SNDRV_CARDS - 1); |
| 2120 | #endif |
| 2121 | } |
| 2122 | |
| 2123 | module_init(alsa_timer_init) |
| 2124 | module_exit(alsa_timer_exit) |
| 2125 | |
| 2126 | EXPORT_SYMBOL(snd_timer_open); |
| 2127 | EXPORT_SYMBOL(snd_timer_close); |
| 2128 | EXPORT_SYMBOL(snd_timer_resolution); |
| 2129 | EXPORT_SYMBOL(snd_timer_start); |
| 2130 | EXPORT_SYMBOL(snd_timer_stop); |
| 2131 | EXPORT_SYMBOL(snd_timer_continue); |
| 2132 | EXPORT_SYMBOL(snd_timer_pause); |
| 2133 | EXPORT_SYMBOL(snd_timer_new); |
| 2134 | EXPORT_SYMBOL(snd_timer_notify); |
| 2135 | EXPORT_SYMBOL(snd_timer_global_new); |
| 2136 | EXPORT_SYMBOL(snd_timer_global_free); |
| 2137 | EXPORT_SYMBOL(snd_timer_global_register); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2138 | EXPORT_SYMBOL(snd_timer_interrupt); |