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 | 8eeaa2f | 2014-02-10 09:48:47 +0100 | [diff] [blame] | 38 | #if IS_ENABLED(CONFIG_SND_HRTIMER) |
Clemens Ladisch | 109fef9 | 2010-11-18 09:53:54 +0100 | [diff] [blame] | 39 | #define DEFAULT_TIMER_LIMIT 4 |
Takashi Iwai | 8eeaa2f | 2014-02-10 09:48:47 +0100 | [diff] [blame] | 40 | #elif IS_ENABLED(CONFIG_SND_RTCTIMER) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 41 | #define DEFAULT_TIMER_LIMIT 2 |
| 42 | #else |
| 43 | #define DEFAULT_TIMER_LIMIT 1 |
| 44 | #endif |
| 45 | |
| 46 | static int timer_limit = DEFAULT_TIMER_LIMIT; |
Jaroslav Kysela | b751eef | 2007-12-13 10:19:42 +0100 | [diff] [blame] | 47 | static int timer_tstamp_monotonic = 1; |
Jaroslav Kysela | c1017a4 | 2007-10-15 09:50:19 +0200 | [diff] [blame] | 48 | MODULE_AUTHOR("Jaroslav Kysela <perex@perex.cz>, Takashi Iwai <tiwai@suse.de>"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | MODULE_DESCRIPTION("ALSA timer interface"); |
| 50 | MODULE_LICENSE("GPL"); |
| 51 | module_param(timer_limit, int, 0444); |
| 52 | MODULE_PARM_DESC(timer_limit, "Maximum global timers in system."); |
Jaroslav Kysela | b751eef | 2007-12-13 10:19:42 +0100 | [diff] [blame] | 53 | module_param(timer_tstamp_monotonic, int, 0444); |
| 54 | 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] | 55 | |
Kay Sievers | 03cfe6f | 2010-11-23 17:43:19 +0100 | [diff] [blame] | 56 | MODULE_ALIAS_CHARDEV(CONFIG_SND_MAJOR, SNDRV_MINOR_TIMER); |
| 57 | MODULE_ALIAS("devname:snd/timer"); |
| 58 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 59 | struct snd_timer_user { |
| 60 | struct snd_timer_instance *timeri; |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 61 | int tread; /* enhanced read with timestamps and events */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 62 | unsigned long ticks; |
| 63 | unsigned long overrun; |
| 64 | int qhead; |
| 65 | int qtail; |
| 66 | int qused; |
| 67 | int queue_size; |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 68 | struct snd_timer_read *queue; |
| 69 | struct snd_timer_tread *tqueue; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | spinlock_t qlock; |
| 71 | unsigned long last_resolution; |
| 72 | unsigned int filter; |
| 73 | struct timespec tstamp; /* trigger tstamp */ |
| 74 | wait_queue_head_t qchange_sleep; |
| 75 | struct fasync_struct *fasync; |
Takashi Iwai | af36802 | 2016-01-13 17:48:01 +0100 | [diff] [blame] | 76 | struct mutex ioctl_lock; |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 77 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | |
| 79 | /* list of timers */ |
| 80 | static LIST_HEAD(snd_timer_list); |
| 81 | |
| 82 | /* list of slave instances */ |
| 83 | static LIST_HEAD(snd_timer_slave_list); |
| 84 | |
| 85 | /* lock for slave active lists */ |
| 86 | static DEFINE_SPINLOCK(slave_active_lock); |
| 87 | |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 88 | static DEFINE_MUTEX(register_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 89 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 90 | static int snd_timer_free(struct snd_timer *timer); |
| 91 | static int snd_timer_dev_free(struct snd_device *device); |
| 92 | static int snd_timer_dev_register(struct snd_device *device); |
Takashi Iwai | c461482 | 2006-06-23 14:38:23 +0200 | [diff] [blame] | 93 | static int snd_timer_dev_disconnect(struct snd_device *device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 94 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 95 | 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] | 96 | |
| 97 | /* |
| 98 | * create a timer instance with the given owner string. |
| 99 | * when timer is not NULL, increments the module counter |
| 100 | */ |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 101 | static struct snd_timer_instance *snd_timer_instance_new(char *owner, |
| 102 | struct snd_timer *timer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 104 | struct snd_timer_instance *timeri; |
Takashi Iwai | ca2c096 | 2005-09-09 14:20:23 +0200 | [diff] [blame] | 105 | timeri = kzalloc(sizeof(*timeri), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | if (timeri == NULL) |
| 107 | return NULL; |
Paulo Marques | 543537b | 2005-06-23 00:09:02 -0700 | [diff] [blame] | 108 | timeri->owner = kstrdup(owner, GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | if (! timeri->owner) { |
| 110 | kfree(timeri); |
| 111 | return NULL; |
| 112 | } |
| 113 | INIT_LIST_HEAD(&timeri->open_list); |
| 114 | INIT_LIST_HEAD(&timeri->active_list); |
| 115 | INIT_LIST_HEAD(&timeri->ack_list); |
| 116 | INIT_LIST_HEAD(&timeri->slave_list_head); |
| 117 | INIT_LIST_HEAD(&timeri->slave_active_head); |
| 118 | |
| 119 | timeri->timer = timer; |
Clemens Ladisch | de24214 | 2005-10-12 17:12:31 +0200 | [diff] [blame] | 120 | if (timer && !try_module_get(timer->module)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | kfree(timeri->owner); |
| 122 | kfree(timeri); |
| 123 | return NULL; |
| 124 | } |
| 125 | |
| 126 | return timeri; |
| 127 | } |
| 128 | |
| 129 | /* |
| 130 | * find a timer instance from the given timer id |
| 131 | */ |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 132 | static struct snd_timer *snd_timer_find(struct snd_timer_id *tid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 133 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 134 | struct snd_timer *timer = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 135 | |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 136 | list_for_each_entry(timer, &snd_timer_list, device_list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | if (timer->tmr_class != tid->dev_class) |
| 138 | continue; |
| 139 | if ((timer->tmr_class == SNDRV_TIMER_CLASS_CARD || |
| 140 | timer->tmr_class == SNDRV_TIMER_CLASS_PCM) && |
| 141 | (timer->card == NULL || |
| 142 | timer->card->number != tid->card)) |
| 143 | continue; |
| 144 | if (timer->tmr_device != tid->device) |
| 145 | continue; |
| 146 | if (timer->tmr_subdevice != tid->subdevice) |
| 147 | continue; |
| 148 | return timer; |
| 149 | } |
| 150 | return NULL; |
| 151 | } |
| 152 | |
Johannes Berg | ee2da99 | 2008-07-09 10:28:41 +0200 | [diff] [blame] | 153 | #ifdef CONFIG_MODULES |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 154 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 155 | static void snd_timer_request(struct snd_timer_id *tid) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 157 | switch (tid->dev_class) { |
| 158 | case SNDRV_TIMER_CLASS_GLOBAL: |
| 159 | if (tid->device < timer_limit) |
| 160 | request_module("snd-timer-%i", tid->device); |
| 161 | break; |
| 162 | case SNDRV_TIMER_CLASS_CARD: |
| 163 | case SNDRV_TIMER_CLASS_PCM: |
| 164 | if (tid->card < snd_ecards_limit) |
| 165 | request_module("snd-card-%i", tid->card); |
| 166 | break; |
| 167 | default: |
| 168 | break; |
| 169 | } |
| 170 | } |
| 171 | |
| 172 | #endif |
| 173 | |
| 174 | /* |
| 175 | * look for a master instance matching with the slave id of the given slave. |
| 176 | * when found, relink the open_link of the slave. |
| 177 | * |
| 178 | * call this with register_mutex down. |
| 179 | */ |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 180 | static void snd_timer_check_slave(struct snd_timer_instance *slave) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 182 | struct snd_timer *timer; |
| 183 | struct snd_timer_instance *master; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | |
| 185 | /* FIXME: it's really dumb to look up all entries.. */ |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 186 | list_for_each_entry(timer, &snd_timer_list, device_list) { |
| 187 | list_for_each_entry(master, &timer->open_list_head, open_list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 188 | if (slave->slave_class == master->slave_class && |
| 189 | slave->slave_id == master->slave_id) { |
Nicolas Kaiser | 5b7c757 | 2011-03-16 17:10:11 +0100 | [diff] [blame] | 190 | list_move_tail(&slave->open_list, |
| 191 | &master->slave_list_head); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 192 | spin_lock_irq(&slave_active_lock); |
| 193 | slave->master = master; |
| 194 | slave->timer = master->timer; |
| 195 | spin_unlock_irq(&slave_active_lock); |
| 196 | return; |
| 197 | } |
| 198 | } |
| 199 | } |
| 200 | } |
| 201 | |
| 202 | /* |
| 203 | * look for slave instances matching with the slave id of the given master. |
| 204 | * when found, relink the open_link of slaves. |
| 205 | * |
| 206 | * call this with register_mutex down. |
| 207 | */ |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 208 | static void snd_timer_check_master(struct snd_timer_instance *master) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | { |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 210 | struct snd_timer_instance *slave, *tmp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 211 | |
| 212 | /* check all pending slaves */ |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 213 | 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] | 214 | if (slave->slave_class == master->slave_class && |
| 215 | slave->slave_id == master->slave_id) { |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 216 | list_move_tail(&slave->open_list, &master->slave_list_head); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 217 | spin_lock_irq(&slave_active_lock); |
Takashi Iwai | b5a663a | 2016-01-14 16:30:58 +0100 | [diff] [blame] | 218 | spin_lock(&master->timer->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | slave->master = master; |
| 220 | slave->timer = master->timer; |
| 221 | if (slave->flags & SNDRV_TIMER_IFLG_RUNNING) |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 222 | list_add_tail(&slave->active_list, |
| 223 | &master->slave_active_head); |
Takashi Iwai | b5a663a | 2016-01-14 16:30:58 +0100 | [diff] [blame] | 224 | spin_unlock(&master->timer->lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 225 | spin_unlock_irq(&slave_active_lock); |
| 226 | } |
| 227 | } |
| 228 | } |
| 229 | |
| 230 | /* |
| 231 | * open a timer instance |
| 232 | * when opening a master, the slave id must be here given. |
| 233 | */ |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 234 | int snd_timer_open(struct snd_timer_instance **ti, |
| 235 | char *owner, struct snd_timer_id *tid, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 236 | unsigned int slave_id) |
| 237 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 238 | struct snd_timer *timer; |
| 239 | struct snd_timer_instance *timeri = NULL; |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 240 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 241 | if (tid->dev_class == SNDRV_TIMER_CLASS_SLAVE) { |
| 242 | /* open a slave instance */ |
| 243 | if (tid->dev_sclass <= SNDRV_TIMER_SCLASS_NONE || |
| 244 | tid->dev_sclass > SNDRV_TIMER_SCLASS_OSS_SEQUENCER) { |
Takashi Iwai | cf74dcf | 2014-02-04 18:22:39 +0100 | [diff] [blame] | 245 | pr_debug("ALSA: timer: invalid slave class %i\n", |
| 246 | tid->dev_sclass); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 247 | return -EINVAL; |
| 248 | } |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 249 | mutex_lock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 250 | timeri = snd_timer_instance_new(owner, NULL); |
Clemens Ladisch | 2fd43d1 | 2005-10-12 17:10:35 +0200 | [diff] [blame] | 251 | if (!timeri) { |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 252 | mutex_unlock(®ister_mutex); |
Clemens Ladisch | 2fd43d1 | 2005-10-12 17:10:35 +0200 | [diff] [blame] | 253 | return -ENOMEM; |
| 254 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | timeri->slave_class = tid->dev_sclass; |
| 256 | timeri->slave_id = tid->device; |
| 257 | timeri->flags |= SNDRV_TIMER_IFLG_SLAVE; |
| 258 | list_add_tail(&timeri->open_list, &snd_timer_slave_list); |
| 259 | snd_timer_check_slave(timeri); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 260 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | *ti = timeri; |
| 262 | return 0; |
| 263 | } |
| 264 | |
| 265 | /* open a master instance */ |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 266 | mutex_lock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 267 | timer = snd_timer_find(tid); |
Johannes Berg | ee2da99 | 2008-07-09 10:28:41 +0200 | [diff] [blame] | 268 | #ifdef CONFIG_MODULES |
| 269 | if (!timer) { |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 270 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 271 | snd_timer_request(tid); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 272 | mutex_lock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | timer = snd_timer_find(tid); |
| 274 | } |
| 275 | #endif |
Clemens Ladisch | 2fd43d1 | 2005-10-12 17:10:35 +0200 | [diff] [blame] | 276 | if (!timer) { |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 277 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | return -ENODEV; |
| 279 | } |
Clemens Ladisch | 2fd43d1 | 2005-10-12 17:10:35 +0200 | [diff] [blame] | 280 | if (!list_empty(&timer->open_list_head)) { |
| 281 | timeri = list_entry(timer->open_list_head.next, |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 282 | struct snd_timer_instance, open_list); |
Clemens Ladisch | 2fd43d1 | 2005-10-12 17:10:35 +0200 | [diff] [blame] | 283 | if (timeri->flags & SNDRV_TIMER_IFLG_EXCLUSIVE) { |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 284 | mutex_unlock(®ister_mutex); |
Clemens Ladisch | 2fd43d1 | 2005-10-12 17:10:35 +0200 | [diff] [blame] | 285 | return -EBUSY; |
| 286 | } |
| 287 | } |
| 288 | timeri = snd_timer_instance_new(owner, timer); |
| 289 | if (!timeri) { |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 290 | mutex_unlock(®ister_mutex); |
Clemens Ladisch | 2fd43d1 | 2005-10-12 17:10:35 +0200 | [diff] [blame] | 291 | return -ENOMEM; |
| 292 | } |
| 293 | timeri->slave_class = tid->dev_sclass; |
| 294 | timeri->slave_id = slave_id; |
| 295 | if (list_empty(&timer->open_list_head) && timer->hw.open) |
| 296 | timer->hw.open(timer); |
| 297 | list_add_tail(&timeri->open_list, &timer->open_list_head); |
| 298 | snd_timer_check_master(timeri); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 299 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 300 | *ti = timeri; |
| 301 | return 0; |
| 302 | } |
| 303 | |
Takashi Iwai | c3b1681 | 2016-01-14 17:01:46 +0100 | [diff] [blame^] | 304 | static int _snd_timer_stop(struct snd_timer_instance *timeri, int event); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 305 | |
| 306 | /* |
| 307 | * close a timer instance |
| 308 | */ |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 309 | int snd_timer_close(struct snd_timer_instance *timeri) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 310 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 311 | struct snd_timer *timer = NULL; |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 312 | struct snd_timer_instance *slave, *tmp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 313 | |
Takashi Iwai | 0072889 | 2008-08-14 07:51:57 +0200 | [diff] [blame] | 314 | if (snd_BUG_ON(!timeri)) |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 315 | return -ENXIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 316 | |
| 317 | /* force to stop the timer */ |
| 318 | snd_timer_stop(timeri); |
| 319 | |
| 320 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) { |
| 321 | /* wait, until the active callback is finished */ |
| 322 | spin_lock_irq(&slave_active_lock); |
| 323 | while (timeri->flags & SNDRV_TIMER_IFLG_CALLBACK) { |
| 324 | spin_unlock_irq(&slave_active_lock); |
| 325 | udelay(10); |
| 326 | spin_lock_irq(&slave_active_lock); |
| 327 | } |
| 328 | spin_unlock_irq(&slave_active_lock); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 329 | mutex_lock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 330 | list_del(&timeri->open_list); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 331 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 332 | } else { |
| 333 | timer = timeri->timer; |
Takashi Iwai | 94094c8 | 2011-08-08 12:28:22 +0200 | [diff] [blame] | 334 | if (snd_BUG_ON(!timer)) |
| 335 | goto out; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 336 | /* wait, until the active callback is finished */ |
| 337 | spin_lock_irq(&timer->lock); |
| 338 | while (timeri->flags & SNDRV_TIMER_IFLG_CALLBACK) { |
| 339 | spin_unlock_irq(&timer->lock); |
| 340 | udelay(10); |
| 341 | spin_lock_irq(&timer->lock); |
| 342 | } |
| 343 | spin_unlock_irq(&timer->lock); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 344 | mutex_lock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | list_del(&timeri->open_list); |
Takashi Iwai | c3b1681 | 2016-01-14 17:01:46 +0100 | [diff] [blame^] | 346 | if (list_empty(&timer->open_list_head) && |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 347 | timer->hw.close) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 348 | timer->hw.close(timer); |
| 349 | /* remove slave links */ |
Takashi Iwai | b5a663a | 2016-01-14 16:30:58 +0100 | [diff] [blame] | 350 | spin_lock_irq(&slave_active_lock); |
| 351 | spin_lock(&timer->lock); |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 352 | list_for_each_entry_safe(slave, tmp, &timeri->slave_list_head, |
| 353 | open_list) { |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 354 | list_move_tail(&slave->open_list, &snd_timer_slave_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | slave->master = NULL; |
| 356 | slave->timer = NULL; |
Takashi Iwai | b5a663a | 2016-01-14 16:30:58 +0100 | [diff] [blame] | 357 | list_del_init(&slave->ack_list); |
| 358 | list_del_init(&slave->active_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | } |
Takashi Iwai | b5a663a | 2016-01-14 16:30:58 +0100 | [diff] [blame] | 360 | spin_unlock(&timer->lock); |
| 361 | spin_unlock_irq(&slave_active_lock); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 362 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | } |
Takashi Iwai | 94094c8 | 2011-08-08 12:28:22 +0200 | [diff] [blame] | 364 | out: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | if (timeri->private_free) |
| 366 | timeri->private_free(timeri); |
| 367 | kfree(timeri->owner); |
| 368 | kfree(timeri); |
Clemens Ladisch | de24214 | 2005-10-12 17:12:31 +0200 | [diff] [blame] | 369 | if (timer) |
| 370 | module_put(timer->module); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | return 0; |
| 372 | } |
| 373 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 374 | unsigned long snd_timer_resolution(struct snd_timer_instance *timeri) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 376 | struct snd_timer * timer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | |
| 378 | if (timeri == NULL) |
| 379 | return 0; |
| 380 | if ((timer = timeri->timer) != NULL) { |
| 381 | if (timer->hw.c_resolution) |
| 382 | return timer->hw.c_resolution(timer); |
| 383 | return timer->hw.resolution; |
| 384 | } |
| 385 | return 0; |
| 386 | } |
| 387 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 388 | static void snd_timer_notify1(struct snd_timer_instance *ti, int event) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 390 | struct snd_timer *timer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | unsigned long flags; |
| 392 | unsigned long resolution = 0; |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 393 | struct snd_timer_instance *ts; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 394 | struct timespec tstamp; |
| 395 | |
Jaroslav Kysela | b751eef | 2007-12-13 10:19:42 +0100 | [diff] [blame] | 396 | if (timer_tstamp_monotonic) |
Thomas Gleixner | 26204e0 | 2014-06-11 23:59:14 +0000 | [diff] [blame] | 397 | ktime_get_ts(&tstamp); |
Jaroslav Kysela | b751eef | 2007-12-13 10:19:42 +0100 | [diff] [blame] | 398 | else |
| 399 | getnstimeofday(&tstamp); |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 400 | if (snd_BUG_ON(event < SNDRV_TIMER_EVENT_START || |
| 401 | event > SNDRV_TIMER_EVENT_PAUSE)) |
| 402 | return; |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 403 | if (event == SNDRV_TIMER_EVENT_START || |
| 404 | event == SNDRV_TIMER_EVENT_CONTINUE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | resolution = snd_timer_resolution(ti); |
| 406 | if (ti->ccallback) |
Jaroslav Kysela | b30477d | 2010-03-03 11:05:55 +0100 | [diff] [blame] | 407 | ti->ccallback(ti, event, &tstamp, resolution); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 408 | if (ti->flags & SNDRV_TIMER_IFLG_SLAVE) |
| 409 | return; |
| 410 | timer = ti->timer; |
| 411 | if (timer == NULL) |
| 412 | return; |
| 413 | if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) |
| 414 | return; |
| 415 | spin_lock_irqsave(&timer->lock, flags); |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 416 | list_for_each_entry(ts, &ti->slave_active_head, active_list) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 417 | if (ts->ccallback) |
| 418 | ts->ccallback(ti, event + 100, &tstamp, resolution); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | spin_unlock_irqrestore(&timer->lock, flags); |
| 420 | } |
| 421 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 422 | static int snd_timer_start1(struct snd_timer *timer, struct snd_timer_instance *timeri, |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 423 | unsigned long sticks) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 424 | { |
Nicolas Kaiser | 5b7c757 | 2011-03-16 17:10:11 +0100 | [diff] [blame] | 425 | list_move_tail(&timeri->active_list, &timer->active_list_head); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 426 | if (timer->running) { |
| 427 | if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) |
| 428 | goto __start_now; |
| 429 | timer->flags |= SNDRV_TIMER_FLG_RESCHED; |
| 430 | timeri->flags |= SNDRV_TIMER_IFLG_START; |
| 431 | return 1; /* delayed start */ |
| 432 | } else { |
| 433 | timer->sticks = sticks; |
| 434 | timer->hw.start(timer); |
| 435 | __start_now: |
| 436 | timer->running++; |
| 437 | timeri->flags |= SNDRV_TIMER_IFLG_RUNNING; |
| 438 | return 0; |
| 439 | } |
| 440 | } |
| 441 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 442 | static int snd_timer_start_slave(struct snd_timer_instance *timeri) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 443 | { |
| 444 | unsigned long flags; |
| 445 | |
| 446 | spin_lock_irqsave(&slave_active_lock, flags); |
| 447 | timeri->flags |= SNDRV_TIMER_IFLG_RUNNING; |
Takashi Iwai | b5a663a | 2016-01-14 16:30:58 +0100 | [diff] [blame] | 448 | if (timeri->master && timeri->timer) { |
| 449 | spin_lock(&timeri->timer->lock); |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 450 | list_add_tail(&timeri->active_list, |
| 451 | &timeri->master->slave_active_head); |
Takashi Iwai | b5a663a | 2016-01-14 16:30:58 +0100 | [diff] [blame] | 452 | spin_unlock(&timeri->timer->lock); |
| 453 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 454 | spin_unlock_irqrestore(&slave_active_lock, flags); |
| 455 | return 1; /* delayed start */ |
| 456 | } |
| 457 | |
| 458 | /* |
| 459 | * start the timer instance |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 460 | */ |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 461 | int snd_timer_start(struct snd_timer_instance *timeri, unsigned int ticks) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 462 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 463 | struct snd_timer *timer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 464 | int result = -EINVAL; |
| 465 | unsigned long flags; |
| 466 | |
| 467 | if (timeri == NULL || ticks < 1) |
| 468 | return -EINVAL; |
| 469 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) { |
| 470 | result = snd_timer_start_slave(timeri); |
| 471 | snd_timer_notify1(timeri, SNDRV_TIMER_EVENT_START); |
| 472 | return result; |
| 473 | } |
| 474 | timer = timeri->timer; |
| 475 | if (timer == NULL) |
| 476 | return -EINVAL; |
| 477 | spin_lock_irqsave(&timer->lock, flags); |
| 478 | timeri->ticks = timeri->cticks = ticks; |
| 479 | timeri->pticks = 0; |
| 480 | result = snd_timer_start1(timer, timeri, ticks); |
| 481 | spin_unlock_irqrestore(&timer->lock, flags); |
| 482 | snd_timer_notify1(timeri, SNDRV_TIMER_EVENT_START); |
| 483 | return result; |
| 484 | } |
| 485 | |
Takashi Iwai | c3b1681 | 2016-01-14 17:01:46 +0100 | [diff] [blame^] | 486 | static int _snd_timer_stop(struct snd_timer_instance *timeri, int event) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 487 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 488 | struct snd_timer *timer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 489 | unsigned long flags; |
| 490 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 491 | if (snd_BUG_ON(!timeri)) |
| 492 | return -ENXIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 493 | |
| 494 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) { |
Takashi Iwai | c3b1681 | 2016-01-14 17:01:46 +0100 | [diff] [blame^] | 495 | spin_lock_irqsave(&slave_active_lock, flags); |
| 496 | timeri->flags &= ~SNDRV_TIMER_IFLG_RUNNING; |
| 497 | list_del_init(&timeri->ack_list); |
| 498 | list_del_init(&timeri->active_list); |
| 499 | spin_unlock_irqrestore(&slave_active_lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 500 | goto __end; |
| 501 | } |
| 502 | timer = timeri->timer; |
| 503 | if (!timer) |
| 504 | return -EINVAL; |
| 505 | spin_lock_irqsave(&timer->lock, flags); |
| 506 | list_del_init(&timeri->ack_list); |
| 507 | list_del_init(&timeri->active_list); |
| 508 | if ((timeri->flags & SNDRV_TIMER_IFLG_RUNNING) && |
| 509 | !(--timer->running)) { |
| 510 | timer->hw.stop(timer); |
| 511 | if (timer->flags & SNDRV_TIMER_FLG_RESCHED) { |
| 512 | timer->flags &= ~SNDRV_TIMER_FLG_RESCHED; |
| 513 | snd_timer_reschedule(timer, 0); |
| 514 | if (timer->flags & SNDRV_TIMER_FLG_CHANGE) { |
| 515 | timer->flags &= ~SNDRV_TIMER_FLG_CHANGE; |
| 516 | timer->hw.start(timer); |
| 517 | } |
| 518 | } |
| 519 | } |
Takashi Iwai | c3b1681 | 2016-01-14 17:01:46 +0100 | [diff] [blame^] | 520 | timeri->flags &= ~(SNDRV_TIMER_IFLG_RUNNING | SNDRV_TIMER_IFLG_START); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 521 | spin_unlock_irqrestore(&timer->lock, flags); |
| 522 | __end: |
| 523 | if (event != SNDRV_TIMER_EVENT_RESOLUTION) |
| 524 | snd_timer_notify1(timeri, event); |
| 525 | return 0; |
| 526 | } |
| 527 | |
| 528 | /* |
| 529 | * stop the timer instance. |
| 530 | * |
| 531 | * do not call this from the timer callback! |
| 532 | */ |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 533 | int snd_timer_stop(struct snd_timer_instance *timeri) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 534 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 535 | struct snd_timer *timer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 536 | unsigned long flags; |
| 537 | int err; |
| 538 | |
Takashi Iwai | c3b1681 | 2016-01-14 17:01:46 +0100 | [diff] [blame^] | 539 | err = _snd_timer_stop(timeri, SNDRV_TIMER_EVENT_STOP); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 540 | if (err < 0) |
| 541 | return err; |
| 542 | timer = timeri->timer; |
Takashi Iwai | 0584ffa | 2011-08-08 12:24:46 +0200 | [diff] [blame] | 543 | if (!timer) |
| 544 | return -EINVAL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 545 | spin_lock_irqsave(&timer->lock, flags); |
| 546 | timeri->cticks = timeri->ticks; |
| 547 | timeri->pticks = 0; |
| 548 | spin_unlock_irqrestore(&timer->lock, flags); |
| 549 | return 0; |
| 550 | } |
| 551 | |
| 552 | /* |
| 553 | * start again.. the tick is kept. |
| 554 | */ |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 555 | int snd_timer_continue(struct snd_timer_instance *timeri) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 556 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 557 | struct snd_timer *timer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 558 | int result = -EINVAL; |
| 559 | unsigned long flags; |
| 560 | |
| 561 | if (timeri == NULL) |
| 562 | return result; |
| 563 | if (timeri->flags & SNDRV_TIMER_IFLG_SLAVE) |
| 564 | return snd_timer_start_slave(timeri); |
| 565 | timer = timeri->timer; |
| 566 | if (! timer) |
| 567 | return -EINVAL; |
| 568 | spin_lock_irqsave(&timer->lock, flags); |
| 569 | if (!timeri->cticks) |
| 570 | timeri->cticks = 1; |
| 571 | timeri->pticks = 0; |
| 572 | result = snd_timer_start1(timer, timeri, timer->sticks); |
| 573 | spin_unlock_irqrestore(&timer->lock, flags); |
| 574 | snd_timer_notify1(timeri, SNDRV_TIMER_EVENT_CONTINUE); |
| 575 | return result; |
| 576 | } |
| 577 | |
| 578 | /* |
| 579 | * pause.. remember the ticks left |
| 580 | */ |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 581 | int snd_timer_pause(struct snd_timer_instance * timeri) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 582 | { |
Takashi Iwai | c3b1681 | 2016-01-14 17:01:46 +0100 | [diff] [blame^] | 583 | return _snd_timer_stop(timeri, SNDRV_TIMER_EVENT_PAUSE); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 584 | } |
| 585 | |
| 586 | /* |
| 587 | * reschedule the timer |
| 588 | * |
| 589 | * start pending instances and check the scheduling ticks. |
| 590 | * when the scheduling ticks is changed set CHANGE flag to reprogram the timer. |
| 591 | */ |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 592 | 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] | 593 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 594 | struct snd_timer_instance *ti; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 595 | unsigned long ticks = ~0UL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 596 | |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 597 | list_for_each_entry(ti, &timer->active_list_head, active_list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 598 | if (ti->flags & SNDRV_TIMER_IFLG_START) { |
| 599 | ti->flags &= ~SNDRV_TIMER_IFLG_START; |
| 600 | ti->flags |= SNDRV_TIMER_IFLG_RUNNING; |
| 601 | timer->running++; |
| 602 | } |
| 603 | if (ti->flags & SNDRV_TIMER_IFLG_RUNNING) { |
| 604 | if (ticks > ti->cticks) |
| 605 | ticks = ti->cticks; |
| 606 | } |
| 607 | } |
| 608 | if (ticks == ~0UL) { |
| 609 | timer->flags &= ~SNDRV_TIMER_FLG_RESCHED; |
| 610 | return; |
| 611 | } |
| 612 | if (ticks > timer->hw.ticks) |
| 613 | ticks = timer->hw.ticks; |
| 614 | if (ticks_left != ticks) |
| 615 | timer->flags |= SNDRV_TIMER_FLG_CHANGE; |
| 616 | timer->sticks = ticks; |
| 617 | } |
| 618 | |
| 619 | /* |
| 620 | * timer tasklet |
| 621 | * |
| 622 | */ |
| 623 | static void snd_timer_tasklet(unsigned long arg) |
| 624 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 625 | struct snd_timer *timer = (struct snd_timer *) arg; |
| 626 | struct snd_timer_instance *ti; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 627 | struct list_head *p; |
| 628 | unsigned long resolution, ticks; |
Takashi Iwai | 2999ff5 | 2006-07-05 17:16:58 +0200 | [diff] [blame] | 629 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 630 | |
Takashi Iwai | 2999ff5 | 2006-07-05 17:16:58 +0200 | [diff] [blame] | 631 | spin_lock_irqsave(&timer->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 632 | /* now process all callbacks */ |
| 633 | while (!list_empty(&timer->sack_list_head)) { |
| 634 | p = timer->sack_list_head.next; /* get first item */ |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 635 | ti = list_entry(p, struct snd_timer_instance, ack_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 636 | |
| 637 | /* remove from ack_list and make empty */ |
| 638 | list_del_init(p); |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 639 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 640 | ticks = ti->pticks; |
| 641 | ti->pticks = 0; |
| 642 | resolution = ti->resolution; |
| 643 | |
| 644 | ti->flags |= SNDRV_TIMER_IFLG_CALLBACK; |
| 645 | spin_unlock(&timer->lock); |
| 646 | if (ti->callback) |
| 647 | ti->callback(ti, resolution, ticks); |
| 648 | spin_lock(&timer->lock); |
| 649 | ti->flags &= ~SNDRV_TIMER_IFLG_CALLBACK; |
| 650 | } |
Takashi Iwai | 2999ff5 | 2006-07-05 17:16:58 +0200 | [diff] [blame] | 651 | spin_unlock_irqrestore(&timer->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 652 | } |
| 653 | |
| 654 | /* |
| 655 | * timer interrupt |
| 656 | * |
| 657 | * ticks_left is usually equal to timer->sticks. |
| 658 | * |
| 659 | */ |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 660 | void snd_timer_interrupt(struct snd_timer * timer, unsigned long ticks_left) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 661 | { |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 662 | struct snd_timer_instance *ti, *ts, *tmp; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 663 | unsigned long resolution, ticks; |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 664 | struct list_head *p, *ack_list_head; |
Takashi Iwai | b32425a | 2005-11-18 18:52:14 +0100 | [diff] [blame] | 665 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 666 | int use_tasklet = 0; |
| 667 | |
| 668 | if (timer == NULL) |
| 669 | return; |
| 670 | |
Takashi Iwai | b32425a | 2005-11-18 18:52:14 +0100 | [diff] [blame] | 671 | spin_lock_irqsave(&timer->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 672 | |
| 673 | /* remember the current resolution */ |
| 674 | if (timer->hw.c_resolution) |
| 675 | resolution = timer->hw.c_resolution(timer); |
| 676 | else |
| 677 | resolution = timer->hw.resolution; |
| 678 | |
| 679 | /* loop for all active instances |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 680 | * 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] | 681 | * processed instance is relinked to done_list_head before the callback |
| 682 | * is called. |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 683 | */ |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 684 | list_for_each_entry_safe(ti, tmp, &timer->active_list_head, |
| 685 | active_list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 686 | if (!(ti->flags & SNDRV_TIMER_IFLG_RUNNING)) |
| 687 | continue; |
| 688 | ti->pticks += ticks_left; |
| 689 | ti->resolution = resolution; |
| 690 | if (ti->cticks < ticks_left) |
| 691 | ti->cticks = 0; |
| 692 | else |
| 693 | ti->cticks -= ticks_left; |
| 694 | if (ti->cticks) /* not expired */ |
| 695 | continue; |
| 696 | if (ti->flags & SNDRV_TIMER_IFLG_AUTO) { |
| 697 | ti->cticks = ti->ticks; |
| 698 | } else { |
| 699 | ti->flags &= ~SNDRV_TIMER_IFLG_RUNNING; |
| 700 | if (--timer->running) |
Takashi Iwai | ee8413b | 2016-01-13 21:35:06 +0100 | [diff] [blame] | 701 | list_del_init(&ti->active_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 702 | } |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 703 | if ((timer->hw.flags & SNDRV_TIMER_HW_TASKLET) || |
| 704 | (ti->flags & SNDRV_TIMER_IFLG_FAST)) |
| 705 | ack_list_head = &timer->ack_list_head; |
| 706 | else |
| 707 | ack_list_head = &timer->sack_list_head; |
| 708 | if (list_empty(&ti->ack_list)) |
| 709 | list_add_tail(&ti->ack_list, ack_list_head); |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 710 | list_for_each_entry(ts, &ti->slave_active_head, active_list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 711 | ts->pticks = ti->pticks; |
| 712 | ts->resolution = resolution; |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 713 | if (list_empty(&ts->ack_list)) |
| 714 | list_add_tail(&ts->ack_list, ack_list_head); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 715 | } |
| 716 | } |
| 717 | if (timer->flags & SNDRV_TIMER_FLG_RESCHED) |
Clemens Ladisch | cd93fe4 | 2006-07-17 16:53:57 +0200 | [diff] [blame] | 718 | snd_timer_reschedule(timer, timer->sticks); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 719 | if (timer->running) { |
| 720 | if (timer->hw.flags & SNDRV_TIMER_HW_STOP) { |
| 721 | timer->hw.stop(timer); |
| 722 | timer->flags |= SNDRV_TIMER_FLG_CHANGE; |
| 723 | } |
| 724 | if (!(timer->hw.flags & SNDRV_TIMER_HW_AUTO) || |
| 725 | (timer->flags & SNDRV_TIMER_FLG_CHANGE)) { |
| 726 | /* restart timer */ |
| 727 | timer->flags &= ~SNDRV_TIMER_FLG_CHANGE; |
| 728 | timer->hw.start(timer); |
| 729 | } |
| 730 | } else { |
| 731 | timer->hw.stop(timer); |
| 732 | } |
| 733 | |
| 734 | /* now process all fast callbacks */ |
| 735 | while (!list_empty(&timer->ack_list_head)) { |
| 736 | p = timer->ack_list_head.next; /* get first item */ |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 737 | ti = list_entry(p, struct snd_timer_instance, ack_list); |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 738 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 739 | /* remove from ack_list and make empty */ |
| 740 | list_del_init(p); |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 741 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 742 | ticks = ti->pticks; |
| 743 | ti->pticks = 0; |
| 744 | |
| 745 | ti->flags |= SNDRV_TIMER_IFLG_CALLBACK; |
| 746 | spin_unlock(&timer->lock); |
| 747 | if (ti->callback) |
| 748 | ti->callback(ti, resolution, ticks); |
| 749 | spin_lock(&timer->lock); |
| 750 | ti->flags &= ~SNDRV_TIMER_IFLG_CALLBACK; |
| 751 | } |
| 752 | |
| 753 | /* do we have any slow callbacks? */ |
| 754 | use_tasklet = !list_empty(&timer->sack_list_head); |
Takashi Iwai | b32425a | 2005-11-18 18:52:14 +0100 | [diff] [blame] | 755 | spin_unlock_irqrestore(&timer->lock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 756 | |
| 757 | if (use_tasklet) |
Takashi Iwai | 1f04128 | 2008-12-18 12:17:55 +0100 | [diff] [blame] | 758 | tasklet_schedule(&timer->task_queue); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 759 | } |
| 760 | |
| 761 | /* |
| 762 | |
| 763 | */ |
| 764 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 765 | int snd_timer_new(struct snd_card *card, char *id, struct snd_timer_id *tid, |
| 766 | struct snd_timer **rtimer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 767 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 768 | struct snd_timer *timer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 769 | int err; |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 770 | static struct snd_device_ops ops = { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 771 | .dev_free = snd_timer_dev_free, |
| 772 | .dev_register = snd_timer_dev_register, |
Takashi Iwai | c461482 | 2006-06-23 14:38:23 +0200 | [diff] [blame] | 773 | .dev_disconnect = snd_timer_dev_disconnect, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 774 | }; |
| 775 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 776 | if (snd_BUG_ON(!tid)) |
| 777 | return -EINVAL; |
| 778 | if (rtimer) |
| 779 | *rtimer = NULL; |
Takashi Iwai | ca2c096 | 2005-09-09 14:20:23 +0200 | [diff] [blame] | 780 | timer = kzalloc(sizeof(*timer), GFP_KERNEL); |
Takashi Iwai | ec0e993 | 2015-03-10 15:42:14 +0100 | [diff] [blame] | 781 | if (!timer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 782 | return -ENOMEM; |
| 783 | timer->tmr_class = tid->dev_class; |
| 784 | timer->card = card; |
| 785 | timer->tmr_device = tid->device; |
| 786 | timer->tmr_subdevice = tid->subdevice; |
| 787 | if (id) |
| 788 | strlcpy(timer->id, id, sizeof(timer->id)); |
| 789 | INIT_LIST_HEAD(&timer->device_list); |
| 790 | INIT_LIST_HEAD(&timer->open_list_head); |
| 791 | INIT_LIST_HEAD(&timer->active_list_head); |
| 792 | INIT_LIST_HEAD(&timer->ack_list_head); |
| 793 | INIT_LIST_HEAD(&timer->sack_list_head); |
| 794 | spin_lock_init(&timer->lock); |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 795 | tasklet_init(&timer->task_queue, snd_timer_tasklet, |
| 796 | (unsigned long)timer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 797 | if (card != NULL) { |
Clemens Ladisch | de24214 | 2005-10-12 17:12:31 +0200 | [diff] [blame] | 798 | timer->module = card->module; |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 799 | err = snd_device_new(card, SNDRV_DEV_TIMER, timer, &ops); |
| 800 | if (err < 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 801 | snd_timer_free(timer); |
| 802 | return err; |
| 803 | } |
| 804 | } |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 805 | if (rtimer) |
| 806 | *rtimer = timer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 807 | return 0; |
| 808 | } |
| 809 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 810 | static int snd_timer_free(struct snd_timer *timer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 811 | { |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 812 | if (!timer) |
| 813 | return 0; |
Takashi Iwai | c461482 | 2006-06-23 14:38:23 +0200 | [diff] [blame] | 814 | |
| 815 | mutex_lock(®ister_mutex); |
| 816 | if (! list_empty(&timer->open_list_head)) { |
| 817 | struct list_head *p, *n; |
| 818 | struct snd_timer_instance *ti; |
Takashi Iwai | cf74dcf | 2014-02-04 18:22:39 +0100 | [diff] [blame] | 819 | pr_warn("ALSA: timer %p is busy?\n", timer); |
Takashi Iwai | c461482 | 2006-06-23 14:38:23 +0200 | [diff] [blame] | 820 | list_for_each_safe(p, n, &timer->open_list_head) { |
| 821 | list_del_init(p); |
| 822 | ti = list_entry(p, struct snd_timer_instance, open_list); |
| 823 | ti->timer = NULL; |
| 824 | } |
| 825 | } |
| 826 | list_del(&timer->device_list); |
| 827 | mutex_unlock(®ister_mutex); |
| 828 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 829 | if (timer->private_free) |
| 830 | timer->private_free(timer); |
| 831 | kfree(timer); |
| 832 | return 0; |
| 833 | } |
| 834 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 835 | static int snd_timer_dev_free(struct snd_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 836 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 837 | struct snd_timer *timer = device->device_data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 838 | return snd_timer_free(timer); |
| 839 | } |
| 840 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 841 | static int snd_timer_dev_register(struct snd_device *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 842 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 843 | struct snd_timer *timer = dev->device_data; |
| 844 | struct snd_timer *timer1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 845 | |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 846 | if (snd_BUG_ON(!timer || !timer->hw.start || !timer->hw.stop)) |
| 847 | return -ENXIO; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 848 | if (!(timer->hw.flags & SNDRV_TIMER_HW_SLAVE) && |
| 849 | !timer->hw.resolution && timer->hw.c_resolution == NULL) |
| 850 | return -EINVAL; |
| 851 | |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 852 | mutex_lock(®ister_mutex); |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 853 | list_for_each_entry(timer1, &snd_timer_list, device_list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 854 | if (timer1->tmr_class > timer->tmr_class) |
| 855 | break; |
| 856 | if (timer1->tmr_class < timer->tmr_class) |
| 857 | continue; |
| 858 | if (timer1->card && timer->card) { |
| 859 | if (timer1->card->number > timer->card->number) |
| 860 | break; |
| 861 | if (timer1->card->number < timer->card->number) |
| 862 | continue; |
| 863 | } |
| 864 | if (timer1->tmr_device > timer->tmr_device) |
| 865 | break; |
| 866 | if (timer1->tmr_device < timer->tmr_device) |
| 867 | continue; |
| 868 | if (timer1->tmr_subdevice > timer->tmr_subdevice) |
| 869 | break; |
| 870 | if (timer1->tmr_subdevice < timer->tmr_subdevice) |
| 871 | continue; |
| 872 | /* conflicts.. */ |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 873 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 874 | return -EBUSY; |
| 875 | } |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 876 | list_add_tail(&timer->device_list, &timer1->device_list); |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 877 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 878 | return 0; |
| 879 | } |
| 880 | |
Takashi Iwai | c461482 | 2006-06-23 14:38:23 +0200 | [diff] [blame] | 881 | static int snd_timer_dev_disconnect(struct snd_device *device) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 882 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 883 | struct snd_timer *timer = device->device_data; |
Takashi Iwai | c461482 | 2006-06-23 14:38:23 +0200 | [diff] [blame] | 884 | mutex_lock(®ister_mutex); |
| 885 | list_del_init(&timer->device_list); |
| 886 | mutex_unlock(®ister_mutex); |
| 887 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 888 | } |
| 889 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 890 | 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] | 891 | { |
| 892 | unsigned long flags; |
| 893 | unsigned long resolution = 0; |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 894 | struct snd_timer_instance *ti, *ts; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 895 | |
Takashi Iwai | 7c22f1a | 2005-10-10 11:46:31 +0200 | [diff] [blame] | 896 | if (! (timer->hw.flags & SNDRV_TIMER_HW_SLAVE)) |
| 897 | return; |
Takashi Iwai | 7eaa943 | 2008-08-08 17:09:09 +0200 | [diff] [blame] | 898 | if (snd_BUG_ON(event < SNDRV_TIMER_EVENT_MSTART || |
| 899 | event > SNDRV_TIMER_EVENT_MRESUME)) |
| 900 | return; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 901 | spin_lock_irqsave(&timer->lock, flags); |
Jaroslav Kysela | a501dfa | 2005-08-16 11:09:05 +0200 | [diff] [blame] | 902 | if (event == SNDRV_TIMER_EVENT_MSTART || |
| 903 | event == SNDRV_TIMER_EVENT_MCONTINUE || |
| 904 | event == SNDRV_TIMER_EVENT_MRESUME) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 905 | if (timer->hw.c_resolution) |
| 906 | resolution = timer->hw.c_resolution(timer); |
| 907 | else |
| 908 | resolution = timer->hw.resolution; |
| 909 | } |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 910 | list_for_each_entry(ti, &timer->active_list_head, active_list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 911 | if (ti->ccallback) |
| 912 | ti->ccallback(ti, event, tstamp, resolution); |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 913 | list_for_each_entry(ts, &ti->slave_active_head, active_list) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 914 | if (ts->ccallback) |
| 915 | ts->ccallback(ts, event, tstamp, resolution); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 916 | } |
| 917 | spin_unlock_irqrestore(&timer->lock, flags); |
| 918 | } |
| 919 | |
| 920 | /* |
| 921 | * exported functions for global timers |
| 922 | */ |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 923 | 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] | 924 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 925 | struct snd_timer_id tid; |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 926 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 927 | tid.dev_class = SNDRV_TIMER_CLASS_GLOBAL; |
| 928 | tid.dev_sclass = SNDRV_TIMER_SCLASS_NONE; |
| 929 | tid.card = -1; |
| 930 | tid.device = device; |
| 931 | tid.subdevice = 0; |
| 932 | return snd_timer_new(NULL, id, &tid, rtimer); |
| 933 | } |
| 934 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 935 | int snd_timer_global_free(struct snd_timer *timer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 936 | { |
| 937 | return snd_timer_free(timer); |
| 938 | } |
| 939 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 940 | int snd_timer_global_register(struct snd_timer *timer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 941 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 942 | struct snd_device dev; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 943 | |
| 944 | memset(&dev, 0, sizeof(dev)); |
| 945 | dev.device_data = timer; |
| 946 | return snd_timer_dev_register(&dev); |
| 947 | } |
| 948 | |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 949 | /* |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 950 | * System timer |
| 951 | */ |
| 952 | |
| 953 | struct snd_timer_system_private { |
| 954 | struct timer_list tlist; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 955 | unsigned long last_expires; |
| 956 | unsigned long last_jiffies; |
| 957 | unsigned long correction; |
| 958 | }; |
| 959 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 960 | static void snd_timer_s_function(unsigned long data) |
| 961 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 962 | struct snd_timer *timer = (struct snd_timer *)data; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 963 | struct snd_timer_system_private *priv = timer->private_data; |
| 964 | unsigned long jiff = jiffies; |
| 965 | if (time_after(jiff, priv->last_expires)) |
Clemens Ladisch | 6ed5eff | 2006-07-17 16:51:37 +0200 | [diff] [blame] | 966 | priv->correction += (long)jiff - (long)priv->last_expires; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 967 | snd_timer_interrupt(timer, (long)jiff - (long)priv->last_jiffies); |
| 968 | } |
| 969 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 970 | static int snd_timer_s_start(struct snd_timer * timer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 971 | { |
| 972 | struct snd_timer_system_private *priv; |
| 973 | unsigned long njiff; |
| 974 | |
| 975 | priv = (struct snd_timer_system_private *) timer->private_data; |
| 976 | njiff = (priv->last_jiffies = jiffies); |
| 977 | if (priv->correction > timer->sticks - 1) { |
| 978 | priv->correction -= timer->sticks - 1; |
| 979 | njiff++; |
| 980 | } else { |
| 981 | njiff += timer->sticks - priv->correction; |
Clemens Ladisch | 17f48ec | 2006-07-17 16:50:56 +0200 | [diff] [blame] | 982 | priv->correction = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 983 | } |
| 984 | priv->last_expires = priv->tlist.expires = njiff; |
| 985 | add_timer(&priv->tlist); |
| 986 | return 0; |
| 987 | } |
| 988 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 989 | static int snd_timer_s_stop(struct snd_timer * timer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 990 | { |
| 991 | struct snd_timer_system_private *priv; |
| 992 | unsigned long jiff; |
| 993 | |
| 994 | priv = (struct snd_timer_system_private *) timer->private_data; |
| 995 | del_timer(&priv->tlist); |
| 996 | jiff = jiffies; |
| 997 | if (time_before(jiff, priv->last_expires)) |
| 998 | timer->sticks = priv->last_expires - jiff; |
| 999 | else |
| 1000 | timer->sticks = 1; |
Clemens Ladisch | de2696d | 2006-07-17 16:52:09 +0200 | [diff] [blame] | 1001 | priv->correction = 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1002 | return 0; |
| 1003 | } |
| 1004 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1005 | static struct snd_timer_hardware snd_timer_system = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1006 | { |
| 1007 | .flags = SNDRV_TIMER_HW_FIRST | SNDRV_TIMER_HW_TASKLET, |
| 1008 | .resolution = 1000000000L / HZ, |
| 1009 | .ticks = 10000000L, |
| 1010 | .start = snd_timer_s_start, |
| 1011 | .stop = snd_timer_s_stop |
| 1012 | }; |
| 1013 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1014 | static void snd_timer_free_system(struct snd_timer *timer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1015 | { |
| 1016 | kfree(timer->private_data); |
| 1017 | } |
| 1018 | |
| 1019 | static int snd_timer_register_system(void) |
| 1020 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1021 | struct snd_timer *timer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1022 | struct snd_timer_system_private *priv; |
| 1023 | int err; |
| 1024 | |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1025 | err = snd_timer_global_new("system", SNDRV_TIMER_GLOBAL_SYSTEM, &timer); |
| 1026 | if (err < 0) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1027 | return err; |
| 1028 | strcpy(timer->name, "system timer"); |
| 1029 | timer->hw = snd_timer_system; |
Takashi Iwai | ca2c096 | 2005-09-09 14:20:23 +0200 | [diff] [blame] | 1030 | priv = kzalloc(sizeof(*priv), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1031 | if (priv == NULL) { |
| 1032 | snd_timer_free(timer); |
| 1033 | return -ENOMEM; |
| 1034 | } |
Takashi Iwai | f169c10 | 2015-01-19 11:26:25 +0100 | [diff] [blame] | 1035 | setup_timer(&priv->tlist, snd_timer_s_function, (unsigned long) timer); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1036 | timer->private_data = priv; |
| 1037 | timer->private_free = snd_timer_free_system; |
| 1038 | return snd_timer_global_register(timer); |
| 1039 | } |
| 1040 | |
Jie Yang | cd6a650 | 2015-05-27 19:45:45 +0800 | [diff] [blame] | 1041 | #ifdef CONFIG_SND_PROC_FS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1042 | /* |
| 1043 | * Info interface |
| 1044 | */ |
| 1045 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1046 | static void snd_timer_proc_read(struct snd_info_entry *entry, |
| 1047 | struct snd_info_buffer *buffer) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1048 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1049 | struct snd_timer *timer; |
| 1050 | struct snd_timer_instance *ti; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1051 | |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 1052 | mutex_lock(®ister_mutex); |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 1053 | list_for_each_entry(timer, &snd_timer_list, device_list) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1054 | switch (timer->tmr_class) { |
| 1055 | case SNDRV_TIMER_CLASS_GLOBAL: |
| 1056 | snd_iprintf(buffer, "G%i: ", timer->tmr_device); |
| 1057 | break; |
| 1058 | case SNDRV_TIMER_CLASS_CARD: |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1059 | snd_iprintf(buffer, "C%i-%i: ", |
| 1060 | timer->card->number, timer->tmr_device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1061 | break; |
| 1062 | case SNDRV_TIMER_CLASS_PCM: |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1063 | snd_iprintf(buffer, "P%i-%i-%i: ", timer->card->number, |
| 1064 | timer->tmr_device, timer->tmr_subdevice); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1065 | break; |
| 1066 | default: |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1067 | snd_iprintf(buffer, "?%i-%i-%i-%i: ", timer->tmr_class, |
| 1068 | timer->card ? timer->card->number : -1, |
| 1069 | timer->tmr_device, timer->tmr_subdevice); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1070 | } |
| 1071 | snd_iprintf(buffer, "%s :", timer->name); |
| 1072 | if (timer->hw.resolution) |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1073 | snd_iprintf(buffer, " %lu.%03luus (%lu ticks)", |
| 1074 | timer->hw.resolution / 1000, |
| 1075 | timer->hw.resolution % 1000, |
| 1076 | timer->hw.ticks); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1077 | if (timer->hw.flags & SNDRV_TIMER_HW_SLAVE) |
| 1078 | snd_iprintf(buffer, " SLAVE"); |
| 1079 | snd_iprintf(buffer, "\n"); |
Johannes Berg | 9244b2c | 2006-10-05 16:02:22 +0200 | [diff] [blame] | 1080 | list_for_each_entry(ti, &timer->open_list_head, open_list) |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1081 | snd_iprintf(buffer, " Client %s : %s\n", |
| 1082 | ti->owner ? ti->owner : "unknown", |
| 1083 | ti->flags & (SNDRV_TIMER_IFLG_START | |
| 1084 | SNDRV_TIMER_IFLG_RUNNING) |
| 1085 | ? "running" : "stopped"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1086 | } |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 1087 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1088 | } |
| 1089 | |
Takashi Iwai | 6581f4e | 2006-05-17 17:14:51 +0200 | [diff] [blame] | 1090 | static struct snd_info_entry *snd_timer_proc_entry; |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 1091 | |
| 1092 | static void __init snd_timer_proc_init(void) |
| 1093 | { |
| 1094 | struct snd_info_entry *entry; |
| 1095 | |
| 1096 | entry = snd_info_create_module_entry(THIS_MODULE, "timers", NULL); |
| 1097 | if (entry != NULL) { |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 1098 | entry->c.text.read = snd_timer_proc_read; |
| 1099 | if (snd_info_register(entry) < 0) { |
| 1100 | snd_info_free_entry(entry); |
| 1101 | entry = NULL; |
| 1102 | } |
| 1103 | } |
| 1104 | snd_timer_proc_entry = entry; |
| 1105 | } |
| 1106 | |
| 1107 | static void __exit snd_timer_proc_done(void) |
| 1108 | { |
Takashi Iwai | 746d4a0 | 2006-06-23 14:37:59 +0200 | [diff] [blame] | 1109 | snd_info_free_entry(snd_timer_proc_entry); |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 1110 | } |
Jie Yang | cd6a650 | 2015-05-27 19:45:45 +0800 | [diff] [blame] | 1111 | #else /* !CONFIG_SND_PROC_FS */ |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 1112 | #define snd_timer_proc_init() |
| 1113 | #define snd_timer_proc_done() |
| 1114 | #endif |
| 1115 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1116 | /* |
| 1117 | * USER SPACE interface |
| 1118 | */ |
| 1119 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1120 | static void snd_timer_user_interrupt(struct snd_timer_instance *timeri, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1121 | unsigned long resolution, |
| 1122 | unsigned long ticks) |
| 1123 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1124 | struct snd_timer_user *tu = timeri->callback_data; |
| 1125 | struct snd_timer_read *r; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1126 | int prev; |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1127 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1128 | spin_lock(&tu->qlock); |
| 1129 | if (tu->qused > 0) { |
| 1130 | prev = tu->qtail == 0 ? tu->queue_size - 1 : tu->qtail - 1; |
| 1131 | r = &tu->queue[prev]; |
| 1132 | if (r->resolution == resolution) { |
| 1133 | r->ticks += ticks; |
| 1134 | goto __wake; |
| 1135 | } |
| 1136 | } |
| 1137 | if (tu->qused >= tu->queue_size) { |
| 1138 | tu->overrun++; |
| 1139 | } else { |
| 1140 | r = &tu->queue[tu->qtail++]; |
| 1141 | tu->qtail %= tu->queue_size; |
| 1142 | r->resolution = resolution; |
| 1143 | r->ticks = ticks; |
| 1144 | tu->qused++; |
| 1145 | } |
| 1146 | __wake: |
| 1147 | spin_unlock(&tu->qlock); |
| 1148 | kill_fasync(&tu->fasync, SIGIO, POLL_IN); |
| 1149 | wake_up(&tu->qchange_sleep); |
| 1150 | } |
| 1151 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1152 | static void snd_timer_user_append_to_tqueue(struct snd_timer_user *tu, |
| 1153 | struct snd_timer_tread *tread) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1154 | { |
| 1155 | if (tu->qused >= tu->queue_size) { |
| 1156 | tu->overrun++; |
| 1157 | } else { |
| 1158 | memcpy(&tu->tqueue[tu->qtail++], tread, sizeof(*tread)); |
| 1159 | tu->qtail %= tu->queue_size; |
| 1160 | tu->qused++; |
| 1161 | } |
| 1162 | } |
| 1163 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1164 | static void snd_timer_user_ccallback(struct snd_timer_instance *timeri, |
| 1165 | int event, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1166 | struct timespec *tstamp, |
| 1167 | unsigned long resolution) |
| 1168 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1169 | struct snd_timer_user *tu = timeri->callback_data; |
| 1170 | struct snd_timer_tread r1; |
Dan Carpenter | bfe7078 | 2010-04-28 10:29:14 +0200 | [diff] [blame] | 1171 | unsigned long flags; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1172 | |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1173 | if (event >= SNDRV_TIMER_EVENT_START && |
| 1174 | event <= SNDRV_TIMER_EVENT_PAUSE) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1175 | tu->tstamp = *tstamp; |
| 1176 | if ((tu->filter & (1 << event)) == 0 || !tu->tread) |
| 1177 | return; |
| 1178 | r1.event = event; |
| 1179 | r1.tstamp = *tstamp; |
| 1180 | r1.val = resolution; |
Dan Carpenter | bfe7078 | 2010-04-28 10:29:14 +0200 | [diff] [blame] | 1181 | spin_lock_irqsave(&tu->qlock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1182 | snd_timer_user_append_to_tqueue(tu, &r1); |
Dan Carpenter | bfe7078 | 2010-04-28 10:29:14 +0200 | [diff] [blame] | 1183 | spin_unlock_irqrestore(&tu->qlock, flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1184 | kill_fasync(&tu->fasync, SIGIO, POLL_IN); |
| 1185 | wake_up(&tu->qchange_sleep); |
| 1186 | } |
| 1187 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1188 | static void snd_timer_user_tinterrupt(struct snd_timer_instance *timeri, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1189 | unsigned long resolution, |
| 1190 | unsigned long ticks) |
| 1191 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1192 | struct snd_timer_user *tu = timeri->callback_data; |
| 1193 | struct snd_timer_tread *r, r1; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1194 | struct timespec tstamp; |
| 1195 | int prev, append = 0; |
| 1196 | |
Takashi Iwai | 07799e7 | 2005-10-10 11:49:49 +0200 | [diff] [blame] | 1197 | memset(&tstamp, 0, sizeof(tstamp)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1198 | spin_lock(&tu->qlock); |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1199 | if ((tu->filter & ((1 << SNDRV_TIMER_EVENT_RESOLUTION) | |
| 1200 | (1 << SNDRV_TIMER_EVENT_TICK))) == 0) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1201 | spin_unlock(&tu->qlock); |
| 1202 | return; |
| 1203 | } |
Jaroslav Kysela | b751eef | 2007-12-13 10:19:42 +0100 | [diff] [blame] | 1204 | if (tu->last_resolution != resolution || ticks > 0) { |
| 1205 | if (timer_tstamp_monotonic) |
Thomas Gleixner | 26204e0 | 2014-06-11 23:59:14 +0000 | [diff] [blame] | 1206 | ktime_get_ts(&tstamp); |
Jaroslav Kysela | b751eef | 2007-12-13 10:19:42 +0100 | [diff] [blame] | 1207 | else |
| 1208 | getnstimeofday(&tstamp); |
| 1209 | } |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1210 | if ((tu->filter & (1 << SNDRV_TIMER_EVENT_RESOLUTION)) && |
| 1211 | tu->last_resolution != resolution) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1212 | r1.event = SNDRV_TIMER_EVENT_RESOLUTION; |
| 1213 | r1.tstamp = tstamp; |
| 1214 | r1.val = resolution; |
| 1215 | snd_timer_user_append_to_tqueue(tu, &r1); |
| 1216 | tu->last_resolution = resolution; |
| 1217 | append++; |
| 1218 | } |
| 1219 | if ((tu->filter & (1 << SNDRV_TIMER_EVENT_TICK)) == 0) |
| 1220 | goto __wake; |
| 1221 | if (ticks == 0) |
| 1222 | goto __wake; |
| 1223 | if (tu->qused > 0) { |
| 1224 | prev = tu->qtail == 0 ? tu->queue_size - 1 : tu->qtail - 1; |
| 1225 | r = &tu->tqueue[prev]; |
| 1226 | if (r->event == SNDRV_TIMER_EVENT_TICK) { |
| 1227 | r->tstamp = tstamp; |
| 1228 | r->val += ticks; |
| 1229 | append++; |
| 1230 | goto __wake; |
| 1231 | } |
| 1232 | } |
| 1233 | r1.event = SNDRV_TIMER_EVENT_TICK; |
| 1234 | r1.tstamp = tstamp; |
| 1235 | r1.val = ticks; |
| 1236 | snd_timer_user_append_to_tqueue(tu, &r1); |
| 1237 | append++; |
| 1238 | __wake: |
| 1239 | spin_unlock(&tu->qlock); |
| 1240 | if (append == 0) |
| 1241 | return; |
| 1242 | kill_fasync(&tu->fasync, SIGIO, POLL_IN); |
| 1243 | wake_up(&tu->qchange_sleep); |
| 1244 | } |
| 1245 | |
| 1246 | static int snd_timer_user_open(struct inode *inode, struct file *file) |
| 1247 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1248 | struct snd_timer_user *tu; |
Takashi Iwai | 02f4865 | 2010-04-13 11:49:04 +0200 | [diff] [blame] | 1249 | int err; |
| 1250 | |
| 1251 | err = nonseekable_open(inode, file); |
| 1252 | if (err < 0) |
| 1253 | return err; |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1254 | |
Takashi Iwai | ca2c096 | 2005-09-09 14:20:23 +0200 | [diff] [blame] | 1255 | tu = kzalloc(sizeof(*tu), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1256 | if (tu == NULL) |
| 1257 | return -ENOMEM; |
| 1258 | spin_lock_init(&tu->qlock); |
| 1259 | init_waitqueue_head(&tu->qchange_sleep); |
Takashi Iwai | af36802 | 2016-01-13 17:48:01 +0100 | [diff] [blame] | 1260 | mutex_init(&tu->ioctl_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1261 | tu->ticks = 1; |
| 1262 | tu->queue_size = 128; |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1263 | tu->queue = kmalloc(tu->queue_size * sizeof(struct snd_timer_read), |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1264 | GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1265 | if (tu->queue == NULL) { |
| 1266 | kfree(tu); |
| 1267 | return -ENOMEM; |
| 1268 | } |
| 1269 | file->private_data = tu; |
| 1270 | return 0; |
| 1271 | } |
| 1272 | |
| 1273 | static int snd_timer_user_release(struct inode *inode, struct file *file) |
| 1274 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1275 | struct snd_timer_user *tu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1276 | |
| 1277 | if (file->private_data) { |
| 1278 | tu = file->private_data; |
| 1279 | file->private_data = NULL; |
Takashi Iwai | af36802 | 2016-01-13 17:48:01 +0100 | [diff] [blame] | 1280 | mutex_lock(&tu->ioctl_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1281 | if (tu->timeri) |
| 1282 | snd_timer_close(tu->timeri); |
Takashi Iwai | af36802 | 2016-01-13 17:48:01 +0100 | [diff] [blame] | 1283 | mutex_unlock(&tu->ioctl_lock); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1284 | kfree(tu->queue); |
| 1285 | kfree(tu->tqueue); |
| 1286 | kfree(tu); |
| 1287 | } |
| 1288 | return 0; |
| 1289 | } |
| 1290 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1291 | static void snd_timer_user_zero_id(struct snd_timer_id *id) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1292 | { |
| 1293 | id->dev_class = SNDRV_TIMER_CLASS_NONE; |
| 1294 | id->dev_sclass = SNDRV_TIMER_SCLASS_NONE; |
| 1295 | id->card = -1; |
| 1296 | id->device = -1; |
| 1297 | id->subdevice = -1; |
| 1298 | } |
| 1299 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1300 | 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] | 1301 | { |
| 1302 | id->dev_class = timer->tmr_class; |
| 1303 | id->dev_sclass = SNDRV_TIMER_SCLASS_NONE; |
| 1304 | id->card = timer->card ? timer->card->number : -1; |
| 1305 | id->device = timer->tmr_device; |
| 1306 | id->subdevice = timer->tmr_subdevice; |
| 1307 | } |
| 1308 | |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1309 | 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] | 1310 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1311 | struct snd_timer_id id; |
| 1312 | struct snd_timer *timer; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1313 | struct list_head *p; |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1314 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1315 | if (copy_from_user(&id, _tid, sizeof(id))) |
| 1316 | return -EFAULT; |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 1317 | mutex_lock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1318 | if (id.dev_class < 0) { /* first item */ |
| 1319 | if (list_empty(&snd_timer_list)) |
| 1320 | snd_timer_user_zero_id(&id); |
| 1321 | else { |
Clemens Ladisch | 9dfba38 | 2005-10-12 17:14:55 +0200 | [diff] [blame] | 1322 | timer = list_entry(snd_timer_list.next, |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1323 | struct snd_timer, device_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1324 | snd_timer_user_copy_id(&id, timer); |
| 1325 | } |
| 1326 | } else { |
| 1327 | switch (id.dev_class) { |
| 1328 | case SNDRV_TIMER_CLASS_GLOBAL: |
| 1329 | id.device = id.device < 0 ? 0 : id.device + 1; |
| 1330 | list_for_each(p, &snd_timer_list) { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1331 | timer = list_entry(p, struct snd_timer, device_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1332 | if (timer->tmr_class > SNDRV_TIMER_CLASS_GLOBAL) { |
| 1333 | snd_timer_user_copy_id(&id, timer); |
| 1334 | break; |
| 1335 | } |
| 1336 | if (timer->tmr_device >= id.device) { |
| 1337 | snd_timer_user_copy_id(&id, timer); |
| 1338 | break; |
| 1339 | } |
| 1340 | } |
| 1341 | if (p == &snd_timer_list) |
| 1342 | snd_timer_user_zero_id(&id); |
| 1343 | break; |
| 1344 | case SNDRV_TIMER_CLASS_CARD: |
| 1345 | case SNDRV_TIMER_CLASS_PCM: |
| 1346 | if (id.card < 0) { |
| 1347 | id.card = 0; |
| 1348 | } else { |
| 1349 | if (id.card < 0) { |
| 1350 | id.card = 0; |
| 1351 | } else { |
| 1352 | if (id.device < 0) { |
| 1353 | id.device = 0; |
| 1354 | } else { |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1355 | if (id.subdevice < 0) { |
| 1356 | id.subdevice = 0; |
| 1357 | } else { |
| 1358 | id.subdevice++; |
| 1359 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1360 | } |
| 1361 | } |
| 1362 | } |
| 1363 | list_for_each(p, &snd_timer_list) { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1364 | timer = list_entry(p, struct snd_timer, device_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1365 | if (timer->tmr_class > id.dev_class) { |
| 1366 | snd_timer_user_copy_id(&id, timer); |
| 1367 | break; |
| 1368 | } |
| 1369 | if (timer->tmr_class < id.dev_class) |
| 1370 | continue; |
| 1371 | if (timer->card->number > id.card) { |
| 1372 | snd_timer_user_copy_id(&id, timer); |
| 1373 | break; |
| 1374 | } |
| 1375 | if (timer->card->number < id.card) |
| 1376 | continue; |
| 1377 | if (timer->tmr_device > id.device) { |
| 1378 | snd_timer_user_copy_id(&id, timer); |
| 1379 | break; |
| 1380 | } |
| 1381 | if (timer->tmr_device < id.device) |
| 1382 | continue; |
| 1383 | if (timer->tmr_subdevice > id.subdevice) { |
| 1384 | snd_timer_user_copy_id(&id, timer); |
| 1385 | break; |
| 1386 | } |
| 1387 | if (timer->tmr_subdevice < id.subdevice) |
| 1388 | continue; |
| 1389 | snd_timer_user_copy_id(&id, timer); |
| 1390 | break; |
| 1391 | } |
| 1392 | if (p == &snd_timer_list) |
| 1393 | snd_timer_user_zero_id(&id); |
| 1394 | break; |
| 1395 | default: |
| 1396 | snd_timer_user_zero_id(&id); |
| 1397 | } |
| 1398 | } |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 1399 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1400 | if (copy_to_user(_tid, &id, sizeof(*_tid))) |
| 1401 | return -EFAULT; |
| 1402 | return 0; |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1403 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1404 | |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1405 | static int snd_timer_user_ginfo(struct file *file, |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1406 | struct snd_timer_ginfo __user *_ginfo) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1407 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1408 | struct snd_timer_ginfo *ginfo; |
| 1409 | struct snd_timer_id tid; |
| 1410 | struct snd_timer *t; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1411 | struct list_head *p; |
| 1412 | int err = 0; |
| 1413 | |
Li Zefan | ef44a1e | 2009-04-10 09:43:08 +0800 | [diff] [blame] | 1414 | ginfo = memdup_user(_ginfo, sizeof(*ginfo)); |
| 1415 | if (IS_ERR(ginfo)) |
| 1416 | return PTR_ERR(ginfo); |
| 1417 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1418 | tid = ginfo->tid; |
| 1419 | memset(ginfo, 0, sizeof(*ginfo)); |
| 1420 | ginfo->tid = tid; |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 1421 | mutex_lock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1422 | t = snd_timer_find(&tid); |
| 1423 | if (t != NULL) { |
| 1424 | ginfo->card = t->card ? t->card->number : -1; |
| 1425 | if (t->hw.flags & SNDRV_TIMER_HW_SLAVE) |
| 1426 | ginfo->flags |= SNDRV_TIMER_FLG_SLAVE; |
| 1427 | strlcpy(ginfo->id, t->id, sizeof(ginfo->id)); |
| 1428 | strlcpy(ginfo->name, t->name, sizeof(ginfo->name)); |
| 1429 | ginfo->resolution = t->hw.resolution; |
| 1430 | if (t->hw.resolution_min > 0) { |
| 1431 | ginfo->resolution_min = t->hw.resolution_min; |
| 1432 | ginfo->resolution_max = t->hw.resolution_max; |
| 1433 | } |
| 1434 | list_for_each(p, &t->open_list_head) { |
| 1435 | ginfo->clients++; |
| 1436 | } |
| 1437 | } else { |
| 1438 | err = -ENODEV; |
| 1439 | } |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 1440 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1441 | if (err >= 0 && copy_to_user(_ginfo, ginfo, sizeof(*ginfo))) |
| 1442 | err = -EFAULT; |
| 1443 | kfree(ginfo); |
| 1444 | return err; |
| 1445 | } |
| 1446 | |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1447 | static int snd_timer_user_gparams(struct file *file, |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1448 | struct snd_timer_gparams __user *_gparams) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1449 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1450 | struct snd_timer_gparams gparams; |
| 1451 | struct snd_timer *t; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1452 | int err; |
| 1453 | |
| 1454 | if (copy_from_user(&gparams, _gparams, sizeof(gparams))) |
| 1455 | return -EFAULT; |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 1456 | mutex_lock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1457 | t = snd_timer_find(&gparams.tid); |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1458 | if (!t) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1459 | err = -ENODEV; |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1460 | goto _error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1461 | } |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1462 | if (!list_empty(&t->open_list_head)) { |
| 1463 | err = -EBUSY; |
| 1464 | goto _error; |
| 1465 | } |
| 1466 | if (!t->hw.set_period) { |
| 1467 | err = -ENOSYS; |
| 1468 | goto _error; |
| 1469 | } |
| 1470 | err = t->hw.set_period(t, gparams.period_num, gparams.period_den); |
| 1471 | _error: |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 1472 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1473 | return err; |
| 1474 | } |
| 1475 | |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1476 | static int snd_timer_user_gstatus(struct file *file, |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1477 | struct snd_timer_gstatus __user *_gstatus) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1478 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1479 | struct snd_timer_gstatus gstatus; |
| 1480 | struct snd_timer_id tid; |
| 1481 | struct snd_timer *t; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1482 | int err = 0; |
| 1483 | |
| 1484 | if (copy_from_user(&gstatus, _gstatus, sizeof(gstatus))) |
| 1485 | return -EFAULT; |
| 1486 | tid = gstatus.tid; |
| 1487 | memset(&gstatus, 0, sizeof(gstatus)); |
| 1488 | gstatus.tid = tid; |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 1489 | mutex_lock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1490 | t = snd_timer_find(&tid); |
| 1491 | if (t != NULL) { |
| 1492 | if (t->hw.c_resolution) |
| 1493 | gstatus.resolution = t->hw.c_resolution(t); |
| 1494 | else |
| 1495 | gstatus.resolution = t->hw.resolution; |
| 1496 | if (t->hw.precise_resolution) { |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1497 | t->hw.precise_resolution(t, &gstatus.resolution_num, |
| 1498 | &gstatus.resolution_den); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1499 | } else { |
| 1500 | gstatus.resolution_num = gstatus.resolution; |
| 1501 | gstatus.resolution_den = 1000000000uL; |
| 1502 | } |
| 1503 | } else { |
| 1504 | err = -ENODEV; |
| 1505 | } |
Ingo Molnar | 1a60d4c | 2006-01-16 16:29:08 +0100 | [diff] [blame] | 1506 | mutex_unlock(®ister_mutex); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1507 | if (err >= 0 && copy_to_user(_gstatus, &gstatus, sizeof(gstatus))) |
| 1508 | err = -EFAULT; |
| 1509 | return err; |
| 1510 | } |
| 1511 | |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1512 | static int snd_timer_user_tselect(struct file *file, |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1513 | struct snd_timer_select __user *_tselect) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1514 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1515 | struct snd_timer_user *tu; |
| 1516 | struct snd_timer_select tselect; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1517 | char str[32]; |
Jaroslav Kysela | c1935b4 | 2005-04-04 16:44:58 +0200 | [diff] [blame] | 1518 | int err = 0; |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1519 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1520 | tu = file->private_data; |
Jaroslav Kysela | c1935b4 | 2005-04-04 16:44:58 +0200 | [diff] [blame] | 1521 | if (tu->timeri) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1522 | snd_timer_close(tu->timeri); |
Jaroslav Kysela | c1935b4 | 2005-04-04 16:44:58 +0200 | [diff] [blame] | 1523 | tu->timeri = NULL; |
| 1524 | } |
| 1525 | if (copy_from_user(&tselect, _tselect, sizeof(tselect))) { |
| 1526 | err = -EFAULT; |
| 1527 | goto __err; |
| 1528 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1529 | sprintf(str, "application %i", current->pid); |
| 1530 | if (tselect.id.dev_class != SNDRV_TIMER_CLASS_SLAVE) |
| 1531 | tselect.id.dev_sclass = SNDRV_TIMER_SCLASS_APPLICATION; |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1532 | err = snd_timer_open(&tu->timeri, str, &tselect.id, current->pid); |
| 1533 | if (err < 0) |
Jaroslav Kysela | c1935b4 | 2005-04-04 16:44:58 +0200 | [diff] [blame] | 1534 | goto __err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1535 | |
Jesper Juhl | 4d57277 | 2005-05-30 17:30:32 +0200 | [diff] [blame] | 1536 | kfree(tu->queue); |
| 1537 | tu->queue = NULL; |
| 1538 | kfree(tu->tqueue); |
| 1539 | tu->tqueue = NULL; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1540 | if (tu->tread) { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1541 | tu->tqueue = kmalloc(tu->queue_size * sizeof(struct snd_timer_tread), |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1542 | GFP_KERNEL); |
Jaroslav Kysela | c1935b4 | 2005-04-04 16:44:58 +0200 | [diff] [blame] | 1543 | if (tu->tqueue == NULL) |
| 1544 | err = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1545 | } else { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1546 | tu->queue = kmalloc(tu->queue_size * sizeof(struct snd_timer_read), |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1547 | GFP_KERNEL); |
Jaroslav Kysela | c1935b4 | 2005-04-04 16:44:58 +0200 | [diff] [blame] | 1548 | if (tu->queue == NULL) |
| 1549 | err = -ENOMEM; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1550 | } |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1551 | |
Jaroslav Kysela | c1935b4 | 2005-04-04 16:44:58 +0200 | [diff] [blame] | 1552 | if (err < 0) { |
| 1553 | snd_timer_close(tu->timeri); |
| 1554 | tu->timeri = NULL; |
| 1555 | } else { |
| 1556 | tu->timeri->flags |= SNDRV_TIMER_IFLG_FAST; |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1557 | tu->timeri->callback = tu->tread |
| 1558 | ? snd_timer_user_tinterrupt : snd_timer_user_interrupt; |
Jaroslav Kysela | c1935b4 | 2005-04-04 16:44:58 +0200 | [diff] [blame] | 1559 | tu->timeri->ccallback = snd_timer_user_ccallback; |
| 1560 | tu->timeri->callback_data = (void *)tu; |
| 1561 | } |
| 1562 | |
| 1563 | __err: |
Jaroslav Kysela | c1935b4 | 2005-04-04 16:44:58 +0200 | [diff] [blame] | 1564 | return err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1565 | } |
| 1566 | |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1567 | static int snd_timer_user_info(struct file *file, |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1568 | struct snd_timer_info __user *_info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1569 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1570 | struct snd_timer_user *tu; |
| 1571 | struct snd_timer_info *info; |
| 1572 | struct snd_timer *t; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1573 | int err = 0; |
| 1574 | |
| 1575 | tu = file->private_data; |
Clemens Ladisch | 7c64ec3 | 2007-07-16 11:01:30 +0200 | [diff] [blame] | 1576 | if (!tu->timeri) |
| 1577 | return -EBADFD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1578 | t = tu->timeri->timer; |
Clemens Ladisch | 7c64ec3 | 2007-07-16 11:01:30 +0200 | [diff] [blame] | 1579 | if (!t) |
| 1580 | return -EBADFD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1581 | |
Takashi Iwai | ca2c096 | 2005-09-09 14:20:23 +0200 | [diff] [blame] | 1582 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1583 | if (! info) |
| 1584 | return -ENOMEM; |
| 1585 | info->card = t->card ? t->card->number : -1; |
| 1586 | if (t->hw.flags & SNDRV_TIMER_HW_SLAVE) |
| 1587 | info->flags |= SNDRV_TIMER_FLG_SLAVE; |
| 1588 | strlcpy(info->id, t->id, sizeof(info->id)); |
| 1589 | strlcpy(info->name, t->name, sizeof(info->name)); |
| 1590 | info->resolution = t->hw.resolution; |
| 1591 | if (copy_to_user(_info, info, sizeof(*_info))) |
| 1592 | err = -EFAULT; |
| 1593 | kfree(info); |
| 1594 | return err; |
| 1595 | } |
| 1596 | |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1597 | static int snd_timer_user_params(struct file *file, |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1598 | struct snd_timer_params __user *_params) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1599 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1600 | struct snd_timer_user *tu; |
| 1601 | struct snd_timer_params params; |
| 1602 | struct snd_timer *t; |
| 1603 | struct snd_timer_read *tr; |
| 1604 | struct snd_timer_tread *ttr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1605 | int err; |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1606 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1607 | tu = file->private_data; |
Clemens Ladisch | 7c64ec3 | 2007-07-16 11:01:30 +0200 | [diff] [blame] | 1608 | if (!tu->timeri) |
| 1609 | return -EBADFD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1610 | t = tu->timeri->timer; |
Clemens Ladisch | 7c64ec3 | 2007-07-16 11:01:30 +0200 | [diff] [blame] | 1611 | if (!t) |
| 1612 | return -EBADFD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1613 | if (copy_from_user(¶ms, _params, sizeof(params))) |
| 1614 | return -EFAULT; |
| 1615 | if (!(t->hw.flags & SNDRV_TIMER_HW_SLAVE) && params.ticks < 1) { |
| 1616 | err = -EINVAL; |
| 1617 | goto _end; |
| 1618 | } |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1619 | if (params.queue_size > 0 && |
| 1620 | (params.queue_size < 32 || params.queue_size > 1024)) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1621 | err = -EINVAL; |
| 1622 | goto _end; |
| 1623 | } |
| 1624 | if (params.filter & ~((1<<SNDRV_TIMER_EVENT_RESOLUTION)| |
| 1625 | (1<<SNDRV_TIMER_EVENT_TICK)| |
| 1626 | (1<<SNDRV_TIMER_EVENT_START)| |
| 1627 | (1<<SNDRV_TIMER_EVENT_STOP)| |
| 1628 | (1<<SNDRV_TIMER_EVENT_CONTINUE)| |
| 1629 | (1<<SNDRV_TIMER_EVENT_PAUSE)| |
Jaroslav Kysela | a501dfa | 2005-08-16 11:09:05 +0200 | [diff] [blame] | 1630 | (1<<SNDRV_TIMER_EVENT_SUSPEND)| |
| 1631 | (1<<SNDRV_TIMER_EVENT_RESUME)| |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1632 | (1<<SNDRV_TIMER_EVENT_MSTART)| |
| 1633 | (1<<SNDRV_TIMER_EVENT_MSTOP)| |
| 1634 | (1<<SNDRV_TIMER_EVENT_MCONTINUE)| |
Jaroslav Kysela | 65d11d9 | 2005-08-16 13:05:43 +0200 | [diff] [blame] | 1635 | (1<<SNDRV_TIMER_EVENT_MPAUSE)| |
| 1636 | (1<<SNDRV_TIMER_EVENT_MSUSPEND)| |
Jaroslav Kysela | a501dfa | 2005-08-16 11:09:05 +0200 | [diff] [blame] | 1637 | (1<<SNDRV_TIMER_EVENT_MRESUME))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1638 | err = -EINVAL; |
| 1639 | goto _end; |
| 1640 | } |
| 1641 | snd_timer_stop(tu->timeri); |
| 1642 | spin_lock_irq(&t->lock); |
| 1643 | tu->timeri->flags &= ~(SNDRV_TIMER_IFLG_AUTO| |
| 1644 | SNDRV_TIMER_IFLG_EXCLUSIVE| |
| 1645 | SNDRV_TIMER_IFLG_EARLY_EVENT); |
| 1646 | if (params.flags & SNDRV_TIMER_PSFLG_AUTO) |
| 1647 | tu->timeri->flags |= SNDRV_TIMER_IFLG_AUTO; |
| 1648 | if (params.flags & SNDRV_TIMER_PSFLG_EXCLUSIVE) |
| 1649 | tu->timeri->flags |= SNDRV_TIMER_IFLG_EXCLUSIVE; |
| 1650 | if (params.flags & SNDRV_TIMER_PSFLG_EARLY_EVENT) |
| 1651 | tu->timeri->flags |= SNDRV_TIMER_IFLG_EARLY_EVENT; |
| 1652 | spin_unlock_irq(&t->lock); |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1653 | if (params.queue_size > 0 && |
| 1654 | (unsigned int)tu->queue_size != params.queue_size) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1655 | if (tu->tread) { |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1656 | ttr = kmalloc(params.queue_size * sizeof(*ttr), |
| 1657 | GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1658 | if (ttr) { |
| 1659 | kfree(tu->tqueue); |
| 1660 | tu->queue_size = params.queue_size; |
| 1661 | tu->tqueue = ttr; |
| 1662 | } |
| 1663 | } else { |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1664 | tr = kmalloc(params.queue_size * sizeof(*tr), |
| 1665 | GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1666 | if (tr) { |
| 1667 | kfree(tu->queue); |
| 1668 | tu->queue_size = params.queue_size; |
| 1669 | tu->queue = tr; |
| 1670 | } |
| 1671 | } |
| 1672 | } |
| 1673 | tu->qhead = tu->qtail = tu->qused = 0; |
| 1674 | if (tu->timeri->flags & SNDRV_TIMER_IFLG_EARLY_EVENT) { |
| 1675 | if (tu->tread) { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1676 | struct snd_timer_tread tread; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1677 | tread.event = SNDRV_TIMER_EVENT_EARLY; |
| 1678 | tread.tstamp.tv_sec = 0; |
| 1679 | tread.tstamp.tv_nsec = 0; |
| 1680 | tread.val = 0; |
| 1681 | snd_timer_user_append_to_tqueue(tu, &tread); |
| 1682 | } else { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1683 | struct snd_timer_read *r = &tu->queue[0]; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1684 | r->resolution = 0; |
| 1685 | r->ticks = 0; |
| 1686 | tu->qused++; |
| 1687 | tu->qtail++; |
| 1688 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1689 | } |
| 1690 | tu->filter = params.filter; |
| 1691 | tu->ticks = params.ticks; |
| 1692 | err = 0; |
| 1693 | _end: |
| 1694 | if (copy_to_user(_params, ¶ms, sizeof(params))) |
| 1695 | return -EFAULT; |
| 1696 | return err; |
| 1697 | } |
| 1698 | |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1699 | static int snd_timer_user_status(struct file *file, |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1700 | struct snd_timer_status __user *_status) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1701 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1702 | struct snd_timer_user *tu; |
| 1703 | struct snd_timer_status status; |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1704 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1705 | tu = file->private_data; |
Clemens Ladisch | 7c64ec3 | 2007-07-16 11:01:30 +0200 | [diff] [blame] | 1706 | if (!tu->timeri) |
| 1707 | return -EBADFD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1708 | memset(&status, 0, sizeof(status)); |
| 1709 | status.tstamp = tu->tstamp; |
| 1710 | status.resolution = snd_timer_resolution(tu->timeri); |
| 1711 | status.lost = tu->timeri->lost; |
| 1712 | status.overrun = tu->overrun; |
| 1713 | spin_lock_irq(&tu->qlock); |
| 1714 | status.queue = tu->qused; |
| 1715 | spin_unlock_irq(&tu->qlock); |
| 1716 | if (copy_to_user(_status, &status, sizeof(status))) |
| 1717 | return -EFAULT; |
| 1718 | return 0; |
| 1719 | } |
| 1720 | |
| 1721 | static int snd_timer_user_start(struct file *file) |
| 1722 | { |
| 1723 | int err; |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1724 | struct snd_timer_user *tu; |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1725 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1726 | tu = file->private_data; |
Clemens Ladisch | 7c64ec3 | 2007-07-16 11:01:30 +0200 | [diff] [blame] | 1727 | if (!tu->timeri) |
| 1728 | return -EBADFD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1729 | snd_timer_stop(tu->timeri); |
| 1730 | tu->timeri->lost = 0; |
| 1731 | tu->last_resolution = 0; |
| 1732 | return (err = snd_timer_start(tu->timeri, tu->ticks)) < 0 ? err : 0; |
| 1733 | } |
| 1734 | |
| 1735 | static int snd_timer_user_stop(struct file *file) |
| 1736 | { |
| 1737 | int err; |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1738 | struct snd_timer_user *tu; |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1739 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1740 | tu = file->private_data; |
Clemens Ladisch | 7c64ec3 | 2007-07-16 11:01:30 +0200 | [diff] [blame] | 1741 | if (!tu->timeri) |
| 1742 | return -EBADFD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1743 | return (err = snd_timer_stop(tu->timeri)) < 0 ? err : 0; |
| 1744 | } |
| 1745 | |
| 1746 | static int snd_timer_user_continue(struct file *file) |
| 1747 | { |
| 1748 | int err; |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1749 | struct snd_timer_user *tu; |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1750 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1751 | tu = file->private_data; |
Clemens Ladisch | 7c64ec3 | 2007-07-16 11:01:30 +0200 | [diff] [blame] | 1752 | if (!tu->timeri) |
| 1753 | return -EBADFD; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1754 | tu->timeri->lost = 0; |
| 1755 | return (err = snd_timer_continue(tu->timeri)) < 0 ? err : 0; |
| 1756 | } |
| 1757 | |
Takashi Iwai | 15790a6 | 2005-05-15 15:04:14 +0200 | [diff] [blame] | 1758 | static int snd_timer_user_pause(struct file *file) |
| 1759 | { |
| 1760 | int err; |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1761 | struct snd_timer_user *tu; |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1762 | |
Takashi Iwai | 15790a6 | 2005-05-15 15:04:14 +0200 | [diff] [blame] | 1763 | tu = file->private_data; |
Clemens Ladisch | 7c64ec3 | 2007-07-16 11:01:30 +0200 | [diff] [blame] | 1764 | if (!tu->timeri) |
| 1765 | return -EBADFD; |
Jaroslav Kysela | d138b44 | 2005-05-16 13:51:39 +0200 | [diff] [blame] | 1766 | return (err = snd_timer_pause(tu->timeri)) < 0 ? err : 0; |
Takashi Iwai | 15790a6 | 2005-05-15 15:04:14 +0200 | [diff] [blame] | 1767 | } |
| 1768 | |
Takashi Iwai | 8c50b37 | 2005-05-15 15:43:54 +0200 | [diff] [blame] | 1769 | enum { |
| 1770 | SNDRV_TIMER_IOCTL_START_OLD = _IO('T', 0x20), |
| 1771 | SNDRV_TIMER_IOCTL_STOP_OLD = _IO('T', 0x21), |
| 1772 | SNDRV_TIMER_IOCTL_CONTINUE_OLD = _IO('T', 0x22), |
| 1773 | SNDRV_TIMER_IOCTL_PAUSE_OLD = _IO('T', 0x23), |
| 1774 | }; |
| 1775 | |
Takashi Iwai | af36802 | 2016-01-13 17:48:01 +0100 | [diff] [blame] | 1776 | static long __snd_timer_user_ioctl(struct file *file, unsigned int cmd, |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1777 | unsigned long arg) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1778 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1779 | struct snd_timer_user *tu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1780 | void __user *argp = (void __user *)arg; |
| 1781 | int __user *p = argp; |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1782 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1783 | tu = file->private_data; |
| 1784 | switch (cmd) { |
| 1785 | case SNDRV_TIMER_IOCTL_PVERSION: |
| 1786 | return put_user(SNDRV_TIMER_VERSION, p) ? -EFAULT : 0; |
| 1787 | case SNDRV_TIMER_IOCTL_NEXT_DEVICE: |
| 1788 | return snd_timer_user_next_device(argp); |
| 1789 | case SNDRV_TIMER_IOCTL_TREAD: |
| 1790 | { |
| 1791 | int xarg; |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1792 | |
Takashi Iwai | af36802 | 2016-01-13 17:48:01 +0100 | [diff] [blame] | 1793 | if (tu->timeri) /* too late */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1794 | return -EBUSY; |
Takashi Iwai | af36802 | 2016-01-13 17:48:01 +0100 | [diff] [blame] | 1795 | if (get_user(xarg, p)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1796 | return -EFAULT; |
| 1797 | tu->tread = xarg ? 1 : 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1798 | return 0; |
| 1799 | } |
| 1800 | case SNDRV_TIMER_IOCTL_GINFO: |
| 1801 | return snd_timer_user_ginfo(file, argp); |
| 1802 | case SNDRV_TIMER_IOCTL_GPARAMS: |
| 1803 | return snd_timer_user_gparams(file, argp); |
| 1804 | case SNDRV_TIMER_IOCTL_GSTATUS: |
| 1805 | return snd_timer_user_gstatus(file, argp); |
| 1806 | case SNDRV_TIMER_IOCTL_SELECT: |
| 1807 | return snd_timer_user_tselect(file, argp); |
| 1808 | case SNDRV_TIMER_IOCTL_INFO: |
| 1809 | return snd_timer_user_info(file, argp); |
| 1810 | case SNDRV_TIMER_IOCTL_PARAMS: |
| 1811 | return snd_timer_user_params(file, argp); |
| 1812 | case SNDRV_TIMER_IOCTL_STATUS: |
| 1813 | return snd_timer_user_status(file, argp); |
| 1814 | case SNDRV_TIMER_IOCTL_START: |
Takashi Iwai | 8c50b37 | 2005-05-15 15:43:54 +0200 | [diff] [blame] | 1815 | case SNDRV_TIMER_IOCTL_START_OLD: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1816 | return snd_timer_user_start(file); |
| 1817 | case SNDRV_TIMER_IOCTL_STOP: |
Takashi Iwai | 8c50b37 | 2005-05-15 15:43:54 +0200 | [diff] [blame] | 1818 | case SNDRV_TIMER_IOCTL_STOP_OLD: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1819 | return snd_timer_user_stop(file); |
| 1820 | case SNDRV_TIMER_IOCTL_CONTINUE: |
Takashi Iwai | 8c50b37 | 2005-05-15 15:43:54 +0200 | [diff] [blame] | 1821 | case SNDRV_TIMER_IOCTL_CONTINUE_OLD: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1822 | return snd_timer_user_continue(file); |
Takashi Iwai | 15790a6 | 2005-05-15 15:04:14 +0200 | [diff] [blame] | 1823 | case SNDRV_TIMER_IOCTL_PAUSE: |
Takashi Iwai | 8c50b37 | 2005-05-15 15:43:54 +0200 | [diff] [blame] | 1824 | case SNDRV_TIMER_IOCTL_PAUSE_OLD: |
Takashi Iwai | 15790a6 | 2005-05-15 15:04:14 +0200 | [diff] [blame] | 1825 | return snd_timer_user_pause(file); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1826 | } |
| 1827 | return -ENOTTY; |
| 1828 | } |
| 1829 | |
Takashi Iwai | af36802 | 2016-01-13 17:48:01 +0100 | [diff] [blame] | 1830 | static long snd_timer_user_ioctl(struct file *file, unsigned int cmd, |
| 1831 | unsigned long arg) |
| 1832 | { |
| 1833 | struct snd_timer_user *tu = file->private_data; |
| 1834 | long ret; |
| 1835 | |
| 1836 | mutex_lock(&tu->ioctl_lock); |
| 1837 | ret = __snd_timer_user_ioctl(file, cmd, arg); |
| 1838 | mutex_unlock(&tu->ioctl_lock); |
| 1839 | return ret; |
| 1840 | } |
| 1841 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1842 | static int snd_timer_user_fasync(int fd, struct file * file, int on) |
| 1843 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1844 | struct snd_timer_user *tu; |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1845 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1846 | tu = file->private_data; |
Jonathan Corbet | 60aa492 | 2009-02-01 14:52:56 -0700 | [diff] [blame] | 1847 | return fasync_helper(fd, file, on, &tu->fasync); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1848 | } |
| 1849 | |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1850 | static ssize_t snd_timer_user_read(struct file *file, char __user *buffer, |
| 1851 | size_t count, loff_t *offset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1852 | { |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1853 | struct snd_timer_user *tu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1854 | long result = 0, unit; |
| 1855 | int err = 0; |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1856 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1857 | tu = file->private_data; |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1858 | 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] | 1859 | spin_lock_irq(&tu->qlock); |
| 1860 | while ((long)count - result >= unit) { |
| 1861 | while (!tu->qused) { |
| 1862 | wait_queue_t wait; |
| 1863 | |
| 1864 | if ((file->f_flags & O_NONBLOCK) != 0 || result > 0) { |
| 1865 | err = -EAGAIN; |
| 1866 | break; |
| 1867 | } |
| 1868 | |
| 1869 | set_current_state(TASK_INTERRUPTIBLE); |
| 1870 | init_waitqueue_entry(&wait, current); |
| 1871 | add_wait_queue(&tu->qchange_sleep, &wait); |
| 1872 | |
| 1873 | spin_unlock_irq(&tu->qlock); |
| 1874 | schedule(); |
| 1875 | spin_lock_irq(&tu->qlock); |
| 1876 | |
| 1877 | remove_wait_queue(&tu->qchange_sleep, &wait); |
| 1878 | |
| 1879 | if (signal_pending(current)) { |
| 1880 | err = -ERESTARTSYS; |
| 1881 | break; |
| 1882 | } |
| 1883 | } |
| 1884 | |
| 1885 | spin_unlock_irq(&tu->qlock); |
| 1886 | if (err < 0) |
| 1887 | goto _error; |
| 1888 | |
| 1889 | if (tu->tread) { |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1890 | if (copy_to_user(buffer, &tu->tqueue[tu->qhead++], |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1891 | sizeof(struct snd_timer_tread))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1892 | err = -EFAULT; |
| 1893 | goto _error; |
| 1894 | } |
| 1895 | } else { |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1896 | if (copy_to_user(buffer, &tu->queue[tu->qhead++], |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1897 | sizeof(struct snd_timer_read))) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1898 | err = -EFAULT; |
| 1899 | goto _error; |
| 1900 | } |
| 1901 | } |
| 1902 | |
| 1903 | tu->qhead %= tu->queue_size; |
| 1904 | |
| 1905 | result += unit; |
| 1906 | buffer += unit; |
| 1907 | |
| 1908 | spin_lock_irq(&tu->qlock); |
| 1909 | tu->qused--; |
| 1910 | } |
| 1911 | spin_unlock_irq(&tu->qlock); |
| 1912 | _error: |
| 1913 | return result > 0 ? result : err; |
| 1914 | } |
| 1915 | |
| 1916 | static unsigned int snd_timer_user_poll(struct file *file, poll_table * wait) |
| 1917 | { |
| 1918 | unsigned int mask; |
Takashi Iwai | 53d2f74 | 2005-11-17 13:56:05 +0100 | [diff] [blame] | 1919 | struct snd_timer_user *tu; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1920 | |
| 1921 | tu = file->private_data; |
| 1922 | |
| 1923 | poll_wait(file, &tu->qchange_sleep, wait); |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1924 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1925 | mask = 0; |
| 1926 | if (tu->qused) |
| 1927 | mask |= POLLIN | POLLRDNORM; |
| 1928 | |
| 1929 | return mask; |
| 1930 | } |
| 1931 | |
| 1932 | #ifdef CONFIG_COMPAT |
| 1933 | #include "timer_compat.c" |
| 1934 | #else |
| 1935 | #define snd_timer_user_ioctl_compat NULL |
| 1936 | #endif |
| 1937 | |
Arjan van de Ven | 9c2e08c | 2007-02-12 00:55:37 -0800 | [diff] [blame] | 1938 | static const struct file_operations snd_timer_f_ops = |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1939 | { |
| 1940 | .owner = THIS_MODULE, |
| 1941 | .read = snd_timer_user_read, |
| 1942 | .open = snd_timer_user_open, |
| 1943 | .release = snd_timer_user_release, |
Takashi Iwai | 02f4865 | 2010-04-13 11:49:04 +0200 | [diff] [blame] | 1944 | .llseek = no_llseek, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1945 | .poll = snd_timer_user_poll, |
| 1946 | .unlocked_ioctl = snd_timer_user_ioctl, |
| 1947 | .compat_ioctl = snd_timer_user_ioctl_compat, |
| 1948 | .fasync = snd_timer_user_fasync, |
| 1949 | }; |
| 1950 | |
Takashi Iwai | 7c35860 | 2015-01-29 18:09:05 +0100 | [diff] [blame] | 1951 | /* unregister the system timer */ |
| 1952 | static void snd_timer_free_all(void) |
| 1953 | { |
| 1954 | struct snd_timer *timer, *n; |
| 1955 | |
| 1956 | list_for_each_entry_safe(timer, n, &snd_timer_list, device_list) |
| 1957 | snd_timer_free(timer); |
| 1958 | } |
| 1959 | |
Takashi Iwai | 89da061 | 2015-01-29 18:12:26 +0100 | [diff] [blame] | 1960 | static struct device timer_dev; |
| 1961 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1962 | /* |
| 1963 | * ENTRY functions |
| 1964 | */ |
| 1965 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1966 | static int __init alsa_timer_init(void) |
| 1967 | { |
| 1968 | int err; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1969 | |
Takashi Iwai | 89da061 | 2015-01-29 18:12:26 +0100 | [diff] [blame] | 1970 | snd_device_initialize(&timer_dev, NULL); |
| 1971 | dev_set_name(&timer_dev, "timer"); |
| 1972 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1973 | #ifdef SNDRV_OSS_INFO_DEV_TIMERS |
Clemens Ladisch | 6b172a8 | 2005-10-12 17:20:21 +0200 | [diff] [blame] | 1974 | snd_oss_info_register(SNDRV_OSS_INFO_DEV_TIMERS, SNDRV_CARDS - 1, |
| 1975 | "system timer"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1976 | #endif |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 1977 | |
Takashi Iwai | 7c35860 | 2015-01-29 18:09:05 +0100 | [diff] [blame] | 1978 | err = snd_timer_register_system(); |
| 1979 | if (err < 0) { |
Takashi Iwai | cf74dcf | 2014-02-04 18:22:39 +0100 | [diff] [blame] | 1980 | pr_err("ALSA: unable to register system timer (%i)\n", err); |
Takashi Iwai | 89da061 | 2015-01-29 18:12:26 +0100 | [diff] [blame] | 1981 | put_device(&timer_dev); |
Takashi Iwai | 7c35860 | 2015-01-29 18:09:05 +0100 | [diff] [blame] | 1982 | return err; |
| 1983 | } |
| 1984 | |
Takashi Iwai | 40a4b26 | 2015-01-30 08:34:58 +0100 | [diff] [blame] | 1985 | err = snd_register_device(SNDRV_DEVICE_TYPE_TIMER, NULL, 0, |
| 1986 | &snd_timer_f_ops, NULL, &timer_dev); |
Takashi Iwai | 7c35860 | 2015-01-29 18:09:05 +0100 | [diff] [blame] | 1987 | if (err < 0) { |
Takashi Iwai | cf74dcf | 2014-02-04 18:22:39 +0100 | [diff] [blame] | 1988 | pr_err("ALSA: unable to register timer device (%i)\n", err); |
Takashi Iwai | 7c35860 | 2015-01-29 18:09:05 +0100 | [diff] [blame] | 1989 | snd_timer_free_all(); |
Takashi Iwai | 89da061 | 2015-01-29 18:12:26 +0100 | [diff] [blame] | 1990 | put_device(&timer_dev); |
Takashi Iwai | 7c35860 | 2015-01-29 18:09:05 +0100 | [diff] [blame] | 1991 | return err; |
| 1992 | } |
| 1993 | |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 1994 | snd_timer_proc_init(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1995 | return 0; |
| 1996 | } |
| 1997 | |
| 1998 | static void __exit alsa_timer_exit(void) |
| 1999 | { |
Takashi Iwai | 40a4b26 | 2015-01-30 08:34:58 +0100 | [diff] [blame] | 2000 | snd_unregister_device(&timer_dev); |
Takashi Iwai | 7c35860 | 2015-01-29 18:09:05 +0100 | [diff] [blame] | 2001 | snd_timer_free_all(); |
Takashi Iwai | 89da061 | 2015-01-29 18:12:26 +0100 | [diff] [blame] | 2002 | put_device(&timer_dev); |
Takashi Iwai | e28563c | 2005-12-01 10:42:42 +0100 | [diff] [blame] | 2003 | snd_timer_proc_done(); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2004 | #ifdef SNDRV_OSS_INFO_DEV_TIMERS |
| 2005 | snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_TIMERS, SNDRV_CARDS - 1); |
| 2006 | #endif |
| 2007 | } |
| 2008 | |
| 2009 | module_init(alsa_timer_init) |
| 2010 | module_exit(alsa_timer_exit) |
| 2011 | |
| 2012 | EXPORT_SYMBOL(snd_timer_open); |
| 2013 | EXPORT_SYMBOL(snd_timer_close); |
| 2014 | EXPORT_SYMBOL(snd_timer_resolution); |
| 2015 | EXPORT_SYMBOL(snd_timer_start); |
| 2016 | EXPORT_SYMBOL(snd_timer_stop); |
| 2017 | EXPORT_SYMBOL(snd_timer_continue); |
| 2018 | EXPORT_SYMBOL(snd_timer_pause); |
| 2019 | EXPORT_SYMBOL(snd_timer_new); |
| 2020 | EXPORT_SYMBOL(snd_timer_notify); |
| 2021 | EXPORT_SYMBOL(snd_timer_global_new); |
| 2022 | EXPORT_SYMBOL(snd_timer_global_free); |
| 2023 | EXPORT_SYMBOL(snd_timer_global_register); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 2024 | EXPORT_SYMBOL(snd_timer_interrupt); |