1b21c60a4SVinod Koul /* 2b21c60a4SVinod Koul * compress_core.c - compress offload core 3b21c60a4SVinod Koul * 4b21c60a4SVinod Koul * Copyright (C) 2011 Intel Corporation 5b21c60a4SVinod Koul * Authors: Vinod Koul <vinod.koul@linux.intel.com> 6b21c60a4SVinod Koul * Pierre-Louis Bossart <pierre-louis.bossart@linux.intel.com> 7b21c60a4SVinod Koul * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 8b21c60a4SVinod Koul * 9b21c60a4SVinod Koul * This program is free software; you can redistribute it and/or modify 10b21c60a4SVinod Koul * it under the terms of the GNU General Public License as published by 11b21c60a4SVinod Koul * the Free Software Foundation; version 2 of the License. 12b21c60a4SVinod Koul * 13b21c60a4SVinod Koul * This program is distributed in the hope that it will be useful, but 14b21c60a4SVinod Koul * WITHOUT ANY WARRANTY; without even the implied warranty of 15b21c60a4SVinod Koul * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU 16b21c60a4SVinod Koul * General Public License for more details. 17b21c60a4SVinod Koul * 18b21c60a4SVinod Koul * You should have received a copy of the GNU General Public License along 19b21c60a4SVinod Koul * with this program; if not, write to the Free Software Foundation, Inc., 20b21c60a4SVinod Koul * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. 21b21c60a4SVinod Koul * 22b21c60a4SVinod Koul * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ 23b21c60a4SVinod Koul * 24b21c60a4SVinod Koul */ 25b21c60a4SVinod Koul #define FORMAT(fmt) "%s: %d: " fmt, __func__, __LINE__ 26b21c60a4SVinod Koul #define pr_fmt(fmt) KBUILD_MODNAME ": " FORMAT(fmt) 27b21c60a4SVinod Koul 28b21c60a4SVinod Koul #include <linux/file.h> 29b21c60a4SVinod Koul #include <linux/fs.h> 30b21c60a4SVinod Koul #include <linux/list.h> 31f0283b58SCharles Keepax #include <linux/math64.h> 32b21c60a4SVinod Koul #include <linux/mm.h> 33b21c60a4SVinod Koul #include <linux/mutex.h> 34b21c60a4SVinod Koul #include <linux/poll.h> 35b21c60a4SVinod Koul #include <linux/slab.h> 36b21c60a4SVinod Koul #include <linux/sched.h> 37f0283b58SCharles Keepax #include <linux/types.h> 38b21c60a4SVinod Koul #include <linux/uio.h> 39b21c60a4SVinod Koul #include <linux/uaccess.h> 40b21c60a4SVinod Koul #include <linux/module.h> 41b21c60a4SVinod Koul #include <sound/core.h> 42b21c60a4SVinod Koul #include <sound/initval.h> 43b21c60a4SVinod Koul #include <sound/compress_params.h> 44b21c60a4SVinod Koul #include <sound/compress_offload.h> 45b21c60a4SVinod Koul #include <sound/compress_driver.h> 46b21c60a4SVinod Koul 47b21c60a4SVinod Koul /* TODO: 48b21c60a4SVinod Koul * - add substream support for multiple devices in case of 49b21c60a4SVinod Koul * SND_DYNAMIC_MINORS is not used 50b21c60a4SVinod Koul * - Multiple node representation 51b21c60a4SVinod Koul * driver should be able to register multiple nodes 52b21c60a4SVinod Koul */ 53b21c60a4SVinod Koul 54b21c60a4SVinod Koul static DEFINE_MUTEX(device_mutex); 55b21c60a4SVinod Koul 56b21c60a4SVinod Koul struct snd_compr_file { 57b21c60a4SVinod Koul unsigned long caps; 58b21c60a4SVinod Koul struct snd_compr_stream stream; 59b21c60a4SVinod Koul }; 60b21c60a4SVinod Koul 61b21c60a4SVinod Koul /* 62b21c60a4SVinod Koul * a note on stream states used: 63b21c60a4SVinod Koul * we use follwing states in the compressed core 64b21c60a4SVinod Koul * SNDRV_PCM_STATE_OPEN: When stream has been opened. 65b21c60a4SVinod Koul * SNDRV_PCM_STATE_SETUP: When stream has been initialized. This is done by 66b21c60a4SVinod Koul * calling SNDRV_COMPRESS_SET_PARAMS. running streams will come to this 67b21c60a4SVinod Koul * state at stop by calling SNDRV_COMPRESS_STOP, or at end of drain. 68b21c60a4SVinod Koul * SNDRV_PCM_STATE_RUNNING: When stream has been started and is 69b21c60a4SVinod Koul * decoding/encoding and rendering/capturing data. 70b21c60a4SVinod Koul * SNDRV_PCM_STATE_DRAINING: When stream is draining current data. This is done 71b21c60a4SVinod Koul * by calling SNDRV_COMPRESS_DRAIN. 72b21c60a4SVinod Koul * SNDRV_PCM_STATE_PAUSED: When stream is paused. This is done by calling 73b21c60a4SVinod Koul * SNDRV_COMPRESS_PAUSE. It can be stopped or resumed by calling 74b21c60a4SVinod Koul * SNDRV_COMPRESS_STOP or SNDRV_COMPRESS_RESUME respectively. 75b21c60a4SVinod Koul */ 76b21c60a4SVinod Koul static int snd_compr_open(struct inode *inode, struct file *f) 77b21c60a4SVinod Koul { 78b21c60a4SVinod Koul struct snd_compr *compr; 79b21c60a4SVinod Koul struct snd_compr_file *data; 80b21c60a4SVinod Koul struct snd_compr_runtime *runtime; 81b21c60a4SVinod Koul enum snd_compr_direction dirn; 82b21c60a4SVinod Koul int maj = imajor(inode); 83b21c60a4SVinod Koul int ret; 84b21c60a4SVinod Koul 8581cb3246SDan Carpenter if ((f->f_flags & O_ACCMODE) == O_WRONLY) 86b21c60a4SVinod Koul dirn = SND_COMPRESS_PLAYBACK; 8781cb3246SDan Carpenter else if ((f->f_flags & O_ACCMODE) == O_RDONLY) 88b21c60a4SVinod Koul dirn = SND_COMPRESS_CAPTURE; 8981cb3246SDan Carpenter else 90b21c60a4SVinod Koul return -EINVAL; 91b21c60a4SVinod Koul 92b21c60a4SVinod Koul if (maj == snd_major) 93b21c60a4SVinod Koul compr = snd_lookup_minor_data(iminor(inode), 94b21c60a4SVinod Koul SNDRV_DEVICE_TYPE_COMPRESS); 95b21c60a4SVinod Koul else 96b21c60a4SVinod Koul return -EBADFD; 97b21c60a4SVinod Koul 98b21c60a4SVinod Koul if (compr == NULL) { 99b21c60a4SVinod Koul pr_err("no device data!!!\n"); 100b21c60a4SVinod Koul return -ENODEV; 101b21c60a4SVinod Koul } 102b21c60a4SVinod Koul 103b21c60a4SVinod Koul if (dirn != compr->direction) { 104b21c60a4SVinod Koul pr_err("this device doesn't support this direction\n"); 105a0830dbdSTakashi Iwai snd_card_unref(compr->card); 106b21c60a4SVinod Koul return -EINVAL; 107b21c60a4SVinod Koul } 108b21c60a4SVinod Koul 109b21c60a4SVinod Koul data = kzalloc(sizeof(*data), GFP_KERNEL); 110a0830dbdSTakashi Iwai if (!data) { 111a0830dbdSTakashi Iwai snd_card_unref(compr->card); 112b21c60a4SVinod Koul return -ENOMEM; 113a0830dbdSTakashi Iwai } 114b21c60a4SVinod Koul data->stream.ops = compr->ops; 115b21c60a4SVinod Koul data->stream.direction = dirn; 116b21c60a4SVinod Koul data->stream.private_data = compr->private_data; 117b21c60a4SVinod Koul data->stream.device = compr; 118b21c60a4SVinod Koul runtime = kzalloc(sizeof(*runtime), GFP_KERNEL); 119b21c60a4SVinod Koul if (!runtime) { 120b21c60a4SVinod Koul kfree(data); 121a0830dbdSTakashi Iwai snd_card_unref(compr->card); 122b21c60a4SVinod Koul return -ENOMEM; 123b21c60a4SVinod Koul } 124b21c60a4SVinod Koul runtime->state = SNDRV_PCM_STATE_OPEN; 125b21c60a4SVinod Koul init_waitqueue_head(&runtime->sleep); 126b21c60a4SVinod Koul data->stream.runtime = runtime; 127b21c60a4SVinod Koul f->private_data = (void *)data; 128b21c60a4SVinod Koul mutex_lock(&compr->lock); 129b21c60a4SVinod Koul ret = compr->ops->open(&data->stream); 130b21c60a4SVinod Koul mutex_unlock(&compr->lock); 131b21c60a4SVinod Koul if (ret) { 132b21c60a4SVinod Koul kfree(runtime); 133b21c60a4SVinod Koul kfree(data); 134b21c60a4SVinod Koul } 135a0830dbdSTakashi Iwai snd_card_unref(compr->card); 136a0830dbdSTakashi Iwai return 0; 137b21c60a4SVinod Koul } 138b21c60a4SVinod Koul 139b21c60a4SVinod Koul static int snd_compr_free(struct inode *inode, struct file *f) 140b21c60a4SVinod Koul { 141b21c60a4SVinod Koul struct snd_compr_file *data = f->private_data; 142b21c60a4SVinod Koul data->stream.ops->free(&data->stream); 143b21c60a4SVinod Koul kfree(data->stream.runtime->buffer); 144b21c60a4SVinod Koul kfree(data->stream.runtime); 145b21c60a4SVinod Koul kfree(data); 146b21c60a4SVinod Koul return 0; 147b21c60a4SVinod Koul } 148b21c60a4SVinod Koul 14917ac8e5cSRichard Fitzgerald static int snd_compr_update_tstamp(struct snd_compr_stream *stream, 150b21c60a4SVinod Koul struct snd_compr_tstamp *tstamp) 151b21c60a4SVinod Koul { 152b21c60a4SVinod Koul if (!stream->ops->pointer) 15317ac8e5cSRichard Fitzgerald return -ENOTSUPP; 154b21c60a4SVinod Koul stream->ops->pointer(stream, tstamp); 155b21c60a4SVinod Koul pr_debug("dsp consumed till %d total %d bytes\n", 156b21c60a4SVinod Koul tstamp->byte_offset, tstamp->copied_total); 1575b1f79f7SCharles Keepax if (stream->direction == SND_COMPRESS_PLAYBACK) 158b21c60a4SVinod Koul stream->runtime->total_bytes_transferred = tstamp->copied_total; 1595b1f79f7SCharles Keepax else 1605b1f79f7SCharles Keepax stream->runtime->total_bytes_available = tstamp->copied_total; 16117ac8e5cSRichard Fitzgerald return 0; 162b21c60a4SVinod Koul } 163b21c60a4SVinod Koul 164b21c60a4SVinod Koul static size_t snd_compr_calc_avail(struct snd_compr_stream *stream, 165b21c60a4SVinod Koul struct snd_compr_avail *avail) 166b21c60a4SVinod Koul { 16717ac8e5cSRichard Fitzgerald memset(avail, 0, sizeof(*avail)); 168b21c60a4SVinod Koul snd_compr_update_tstamp(stream, &avail->tstamp); 16917ac8e5cSRichard Fitzgerald /* Still need to return avail even if tstamp can't be filled in */ 170b21c60a4SVinod Koul 171b21c60a4SVinod Koul if (stream->runtime->total_bytes_available == 0 && 1725b1f79f7SCharles Keepax stream->runtime->state == SNDRV_PCM_STATE_SETUP && 1735b1f79f7SCharles Keepax stream->direction == SND_COMPRESS_PLAYBACK) { 174b21c60a4SVinod Koul pr_debug("detected init and someone forgot to do a write\n"); 175b21c60a4SVinod Koul return stream->runtime->buffer_size; 176b21c60a4SVinod Koul } 177b21c60a4SVinod Koul pr_debug("app wrote %lld, DSP consumed %lld\n", 178b21c60a4SVinod Koul stream->runtime->total_bytes_available, 179b21c60a4SVinod Koul stream->runtime->total_bytes_transferred); 180b21c60a4SVinod Koul if (stream->runtime->total_bytes_available == 181b21c60a4SVinod Koul stream->runtime->total_bytes_transferred) { 1825b1f79f7SCharles Keepax if (stream->direction == SND_COMPRESS_PLAYBACK) { 183b21c60a4SVinod Koul pr_debug("both pointers are same, returning full avail\n"); 184b21c60a4SVinod Koul return stream->runtime->buffer_size; 1855b1f79f7SCharles Keepax } else { 1865b1f79f7SCharles Keepax pr_debug("both pointers are same, returning no avail\n"); 1875b1f79f7SCharles Keepax return 0; 1885b1f79f7SCharles Keepax } 189b21c60a4SVinod Koul } 190b21c60a4SVinod Koul 1915b1f79f7SCharles Keepax avail->avail = stream->runtime->total_bytes_available - 1925b1f79f7SCharles Keepax stream->runtime->total_bytes_transferred; 1935b1f79f7SCharles Keepax if (stream->direction == SND_COMPRESS_PLAYBACK) 1945b1f79f7SCharles Keepax avail->avail = stream->runtime->buffer_size - avail->avail; 1955b1f79f7SCharles Keepax 1964c28e32dSCharles Keepax pr_debug("ret avail as %lld\n", avail->avail); 1974c28e32dSCharles Keepax return avail->avail; 198b21c60a4SVinod Koul } 199b21c60a4SVinod Koul 200b21c60a4SVinod Koul static inline size_t snd_compr_get_avail(struct snd_compr_stream *stream) 201b21c60a4SVinod Koul { 202b21c60a4SVinod Koul struct snd_compr_avail avail; 203b21c60a4SVinod Koul 204b21c60a4SVinod Koul return snd_compr_calc_avail(stream, &avail); 205b21c60a4SVinod Koul } 206b21c60a4SVinod Koul 207b21c60a4SVinod Koul static int 208b21c60a4SVinod Koul snd_compr_ioctl_avail(struct snd_compr_stream *stream, unsigned long arg) 209b21c60a4SVinod Koul { 210b21c60a4SVinod Koul struct snd_compr_avail ioctl_avail; 211b21c60a4SVinod Koul size_t avail; 212b21c60a4SVinod Koul 213b21c60a4SVinod Koul avail = snd_compr_calc_avail(stream, &ioctl_avail); 214b21c60a4SVinod Koul ioctl_avail.avail = avail; 215b21c60a4SVinod Koul 216b21c60a4SVinod Koul if (copy_to_user((__u64 __user *)arg, 217b21c60a4SVinod Koul &ioctl_avail, sizeof(ioctl_avail))) 218b21c60a4SVinod Koul return -EFAULT; 219b21c60a4SVinod Koul return 0; 220b21c60a4SVinod Koul } 221b21c60a4SVinod Koul 222b21c60a4SVinod Koul static int snd_compr_write_data(struct snd_compr_stream *stream, 223b21c60a4SVinod Koul const char __user *buf, size_t count) 224b21c60a4SVinod Koul { 225b21c60a4SVinod Koul void *dstn; 226b21c60a4SVinod Koul size_t copy; 227b21c60a4SVinod Koul struct snd_compr_runtime *runtime = stream->runtime; 228f0283b58SCharles Keepax /* 64-bit Modulus */ 229f0283b58SCharles Keepax u64 app_pointer = div64_u64(runtime->total_bytes_available, 230f0283b58SCharles Keepax runtime->buffer_size); 231f0283b58SCharles Keepax app_pointer = runtime->total_bytes_available - 232f0283b58SCharles Keepax (app_pointer * runtime->buffer_size); 233b21c60a4SVinod Koul 234f0283b58SCharles Keepax dstn = runtime->buffer + app_pointer; 235b21c60a4SVinod Koul pr_debug("copying %ld at %lld\n", 236f0283b58SCharles Keepax (unsigned long)count, app_pointer); 237f0283b58SCharles Keepax if (count < runtime->buffer_size - app_pointer) { 238b21c60a4SVinod Koul if (copy_from_user(dstn, buf, count)) 239b21c60a4SVinod Koul return -EFAULT; 240b21c60a4SVinod Koul } else { 241f0283b58SCharles Keepax copy = runtime->buffer_size - app_pointer; 242b21c60a4SVinod Koul if (copy_from_user(dstn, buf, copy)) 243b21c60a4SVinod Koul return -EFAULT; 244b21c60a4SVinod Koul if (copy_from_user(runtime->buffer, buf + copy, count - copy)) 245b21c60a4SVinod Koul return -EFAULT; 246b21c60a4SVinod Koul } 247b21c60a4SVinod Koul /* if DSP cares, let it know data has been written */ 248b21c60a4SVinod Koul if (stream->ops->ack) 249b21c60a4SVinod Koul stream->ops->ack(stream, count); 250b21c60a4SVinod Koul return count; 251b21c60a4SVinod Koul } 252b21c60a4SVinod Koul 253b21c60a4SVinod Koul static ssize_t snd_compr_write(struct file *f, const char __user *buf, 254b21c60a4SVinod Koul size_t count, loff_t *offset) 255b21c60a4SVinod Koul { 256b21c60a4SVinod Koul struct snd_compr_file *data = f->private_data; 257b21c60a4SVinod Koul struct snd_compr_stream *stream; 258b21c60a4SVinod Koul size_t avail; 259b21c60a4SVinod Koul int retval; 260b21c60a4SVinod Koul 261b21c60a4SVinod Koul if (snd_BUG_ON(!data)) 262b21c60a4SVinod Koul return -EFAULT; 263b21c60a4SVinod Koul 264b21c60a4SVinod Koul stream = &data->stream; 265b21c60a4SVinod Koul mutex_lock(&stream->device->lock); 266b21c60a4SVinod Koul /* write is allowed when stream is running or has been steup */ 267b21c60a4SVinod Koul if (stream->runtime->state != SNDRV_PCM_STATE_SETUP && 268b21c60a4SVinod Koul stream->runtime->state != SNDRV_PCM_STATE_RUNNING) { 269b21c60a4SVinod Koul mutex_unlock(&stream->device->lock); 270b21c60a4SVinod Koul return -EBADFD; 271b21c60a4SVinod Koul } 272b21c60a4SVinod Koul 273b21c60a4SVinod Koul avail = snd_compr_get_avail(stream); 274b21c60a4SVinod Koul pr_debug("avail returned %ld\n", (unsigned long)avail); 275b21c60a4SVinod Koul /* calculate how much we can write to buffer */ 276b21c60a4SVinod Koul if (avail > count) 277b21c60a4SVinod Koul avail = count; 278b21c60a4SVinod Koul 2794daf891cSCharles Keepax if (stream->ops->copy) { 2804daf891cSCharles Keepax char __user* cbuf = (char __user*)buf; 2814daf891cSCharles Keepax retval = stream->ops->copy(stream, cbuf, avail); 2824daf891cSCharles Keepax } else { 283b21c60a4SVinod Koul retval = snd_compr_write_data(stream, buf, avail); 2844daf891cSCharles Keepax } 285b21c60a4SVinod Koul if (retval > 0) 286b21c60a4SVinod Koul stream->runtime->total_bytes_available += retval; 287b21c60a4SVinod Koul 288b21c60a4SVinod Koul /* while initiating the stream, write should be called before START 289b21c60a4SVinod Koul * call, so in setup move state */ 290b21c60a4SVinod Koul if (stream->runtime->state == SNDRV_PCM_STATE_SETUP) { 291b21c60a4SVinod Koul stream->runtime->state = SNDRV_PCM_STATE_PREPARED; 292b21c60a4SVinod Koul pr_debug("stream prepared, Houston we are good to go\n"); 293b21c60a4SVinod Koul } 294b21c60a4SVinod Koul 295b21c60a4SVinod Koul mutex_unlock(&stream->device->lock); 296b21c60a4SVinod Koul return retval; 297b21c60a4SVinod Koul } 298b21c60a4SVinod Koul 299b21c60a4SVinod Koul 300b21c60a4SVinod Koul static ssize_t snd_compr_read(struct file *f, char __user *buf, 301b21c60a4SVinod Koul size_t count, loff_t *offset) 302b21c60a4SVinod Koul { 30349bb6402SCharles Keepax struct snd_compr_file *data = f->private_data; 30449bb6402SCharles Keepax struct snd_compr_stream *stream; 30549bb6402SCharles Keepax size_t avail; 30649bb6402SCharles Keepax int retval; 30749bb6402SCharles Keepax 30849bb6402SCharles Keepax if (snd_BUG_ON(!data)) 30949bb6402SCharles Keepax return -EFAULT; 31049bb6402SCharles Keepax 31149bb6402SCharles Keepax stream = &data->stream; 31249bb6402SCharles Keepax mutex_lock(&stream->device->lock); 31349bb6402SCharles Keepax 31449bb6402SCharles Keepax /* read is allowed when stream is running */ 31549bb6402SCharles Keepax if (stream->runtime->state != SNDRV_PCM_STATE_RUNNING) { 31649bb6402SCharles Keepax retval = -EBADFD; 31749bb6402SCharles Keepax goto out; 31849bb6402SCharles Keepax } 31949bb6402SCharles Keepax 32049bb6402SCharles Keepax avail = snd_compr_get_avail(stream); 32149bb6402SCharles Keepax pr_debug("avail returned %ld\n", (unsigned long)avail); 32249bb6402SCharles Keepax /* calculate how much we can read from buffer */ 32349bb6402SCharles Keepax if (avail > count) 32449bb6402SCharles Keepax avail = count; 32549bb6402SCharles Keepax 32649bb6402SCharles Keepax if (stream->ops->copy) { 32749bb6402SCharles Keepax retval = stream->ops->copy(stream, buf, avail); 32849bb6402SCharles Keepax } else { 32949bb6402SCharles Keepax retval = -ENXIO; 33049bb6402SCharles Keepax goto out; 33149bb6402SCharles Keepax } 33249bb6402SCharles Keepax if (retval > 0) 33349bb6402SCharles Keepax stream->runtime->total_bytes_transferred += retval; 33449bb6402SCharles Keepax 33549bb6402SCharles Keepax out: 33649bb6402SCharles Keepax mutex_unlock(&stream->device->lock); 33749bb6402SCharles Keepax return retval; 338b21c60a4SVinod Koul } 339b21c60a4SVinod Koul 340b21c60a4SVinod Koul static int snd_compr_mmap(struct file *f, struct vm_area_struct *vma) 341b21c60a4SVinod Koul { 342b21c60a4SVinod Koul return -ENXIO; 343b21c60a4SVinod Koul } 344b21c60a4SVinod Koul 345b21c60a4SVinod Koul static inline int snd_compr_get_poll(struct snd_compr_stream *stream) 346b21c60a4SVinod Koul { 347b21c60a4SVinod Koul if (stream->direction == SND_COMPRESS_PLAYBACK) 348b21c60a4SVinod Koul return POLLOUT | POLLWRNORM; 349b21c60a4SVinod Koul else 350b21c60a4SVinod Koul return POLLIN | POLLRDNORM; 351b21c60a4SVinod Koul } 352b21c60a4SVinod Koul 353b21c60a4SVinod Koul static unsigned int snd_compr_poll(struct file *f, poll_table *wait) 354b21c60a4SVinod Koul { 355b21c60a4SVinod Koul struct snd_compr_file *data = f->private_data; 356b21c60a4SVinod Koul struct snd_compr_stream *stream; 357b21c60a4SVinod Koul size_t avail; 358b21c60a4SVinod Koul int retval = 0; 359b21c60a4SVinod Koul 360b21c60a4SVinod Koul if (snd_BUG_ON(!data)) 361b21c60a4SVinod Koul return -EFAULT; 362b21c60a4SVinod Koul stream = &data->stream; 363b21c60a4SVinod Koul if (snd_BUG_ON(!stream)) 364b21c60a4SVinod Koul return -EFAULT; 365b21c60a4SVinod Koul 366b21c60a4SVinod Koul mutex_lock(&stream->device->lock); 367b21c60a4SVinod Koul if (stream->runtime->state == SNDRV_PCM_STATE_PAUSED || 368b21c60a4SVinod Koul stream->runtime->state == SNDRV_PCM_STATE_OPEN) { 369b21c60a4SVinod Koul retval = -EBADFD; 370b21c60a4SVinod Koul goto out; 371b21c60a4SVinod Koul } 372b21c60a4SVinod Koul poll_wait(f, &stream->runtime->sleep, wait); 373b21c60a4SVinod Koul 374b21c60a4SVinod Koul avail = snd_compr_get_avail(stream); 375b21c60a4SVinod Koul pr_debug("avail is %ld\n", (unsigned long)avail); 376b21c60a4SVinod Koul /* check if we have at least one fragment to fill */ 377b21c60a4SVinod Koul switch (stream->runtime->state) { 378b21c60a4SVinod Koul case SNDRV_PCM_STATE_DRAINING: 379b21c60a4SVinod Koul /* stream has been woken up after drain is complete 380b21c60a4SVinod Koul * draining done so set stream state to stopped 381b21c60a4SVinod Koul */ 382b21c60a4SVinod Koul retval = snd_compr_get_poll(stream); 383b21c60a4SVinod Koul stream->runtime->state = SNDRV_PCM_STATE_SETUP; 384b21c60a4SVinod Koul break; 385b21c60a4SVinod Koul case SNDRV_PCM_STATE_RUNNING: 386b21c60a4SVinod Koul case SNDRV_PCM_STATE_PREPARED: 387b21c60a4SVinod Koul case SNDRV_PCM_STATE_PAUSED: 388b21c60a4SVinod Koul if (avail >= stream->runtime->fragment_size) 389b21c60a4SVinod Koul retval = snd_compr_get_poll(stream); 390b21c60a4SVinod Koul break; 391b21c60a4SVinod Koul default: 392b21c60a4SVinod Koul if (stream->direction == SND_COMPRESS_PLAYBACK) 393b21c60a4SVinod Koul retval = POLLOUT | POLLWRNORM | POLLERR; 394b21c60a4SVinod Koul else 395b21c60a4SVinod Koul retval = POLLIN | POLLRDNORM | POLLERR; 396b21c60a4SVinod Koul break; 397b21c60a4SVinod Koul } 398b21c60a4SVinod Koul out: 399b21c60a4SVinod Koul mutex_unlock(&stream->device->lock); 400b21c60a4SVinod Koul return retval; 401b21c60a4SVinod Koul } 402b21c60a4SVinod Koul 403b21c60a4SVinod Koul static int 404b21c60a4SVinod Koul snd_compr_get_caps(struct snd_compr_stream *stream, unsigned long arg) 405b21c60a4SVinod Koul { 406b21c60a4SVinod Koul int retval; 407b21c60a4SVinod Koul struct snd_compr_caps caps; 408b21c60a4SVinod Koul 409b21c60a4SVinod Koul if (!stream->ops->get_caps) 410b21c60a4SVinod Koul return -ENXIO; 411b21c60a4SVinod Koul 4121c62e9f2SDan Carpenter memset(&caps, 0, sizeof(caps)); 413b21c60a4SVinod Koul retval = stream->ops->get_caps(stream, &caps); 414b21c60a4SVinod Koul if (retval) 415b21c60a4SVinod Koul goto out; 416b21c60a4SVinod Koul if (copy_to_user((void __user *)arg, &caps, sizeof(caps))) 417b21c60a4SVinod Koul retval = -EFAULT; 418b21c60a4SVinod Koul out: 419b21c60a4SVinod Koul return retval; 420b21c60a4SVinod Koul } 421b21c60a4SVinod Koul 422b21c60a4SVinod Koul static int 423b21c60a4SVinod Koul snd_compr_get_codec_caps(struct snd_compr_stream *stream, unsigned long arg) 424b21c60a4SVinod Koul { 425b21c60a4SVinod Koul int retval; 426b21c60a4SVinod Koul struct snd_compr_codec_caps *caps; 427b21c60a4SVinod Koul 428b21c60a4SVinod Koul if (!stream->ops->get_codec_caps) 429b21c60a4SVinod Koul return -ENXIO; 430b21c60a4SVinod Koul 43147966e97STakashi Iwai caps = kzalloc(sizeof(*caps), GFP_KERNEL); 432b21c60a4SVinod Koul if (!caps) 433b21c60a4SVinod Koul return -ENOMEM; 434b21c60a4SVinod Koul 435b21c60a4SVinod Koul retval = stream->ops->get_codec_caps(stream, caps); 436b21c60a4SVinod Koul if (retval) 437b21c60a4SVinod Koul goto out; 438b21c60a4SVinod Koul if (copy_to_user((void __user *)arg, caps, sizeof(*caps))) 439b21c60a4SVinod Koul retval = -EFAULT; 440b21c60a4SVinod Koul 441b21c60a4SVinod Koul out: 442b21c60a4SVinod Koul kfree(caps); 443b21c60a4SVinod Koul return retval; 444b21c60a4SVinod Koul } 445b21c60a4SVinod Koul 446b21c60a4SVinod Koul /* revisit this with snd_pcm_preallocate_xxx */ 447b21c60a4SVinod Koul static int snd_compr_allocate_buffer(struct snd_compr_stream *stream, 448b21c60a4SVinod Koul struct snd_compr_params *params) 449b21c60a4SVinod Koul { 450b21c60a4SVinod Koul unsigned int buffer_size; 451b21c60a4SVinod Koul void *buffer; 452b21c60a4SVinod Koul 453b21c60a4SVinod Koul buffer_size = params->buffer.fragment_size * params->buffer.fragments; 454b21c60a4SVinod Koul if (stream->ops->copy) { 455b21c60a4SVinod Koul buffer = NULL; 456b21c60a4SVinod Koul /* if copy is defined the driver will be required to copy 457b21c60a4SVinod Koul * the data from core 458b21c60a4SVinod Koul */ 459b21c60a4SVinod Koul } else { 460b21c60a4SVinod Koul buffer = kmalloc(buffer_size, GFP_KERNEL); 461b21c60a4SVinod Koul if (!buffer) 462b21c60a4SVinod Koul return -ENOMEM; 463b21c60a4SVinod Koul } 464b21c60a4SVinod Koul stream->runtime->fragment_size = params->buffer.fragment_size; 465b21c60a4SVinod Koul stream->runtime->fragments = params->buffer.fragments; 466b21c60a4SVinod Koul stream->runtime->buffer = buffer; 467b21c60a4SVinod Koul stream->runtime->buffer_size = buffer_size; 468b21c60a4SVinod Koul return 0; 469b21c60a4SVinod Koul } 470b21c60a4SVinod Koul 4714dc040a0SVinod Koul static int snd_compress_check_input(struct snd_compr_params *params) 4724dc040a0SVinod Koul { 4734dc040a0SVinod Koul /* first let's check the buffer parameter's */ 4744dc040a0SVinod Koul if (params->buffer.fragment_size == 0 || 4754dc040a0SVinod Koul params->buffer.fragments > SIZE_MAX / params->buffer.fragment_size) 4764dc040a0SVinod Koul return -EINVAL; 4774dc040a0SVinod Koul 478fb4a9779SVinod Koul /* now codec parameters */ 479fb4a9779SVinod Koul if (params->codec.id == 0 || params->codec.id > SND_AUDIOCODEC_MAX) 480fb4a9779SVinod Koul return -EINVAL; 481fb4a9779SVinod Koul 482fb4a9779SVinod Koul if (params->codec.ch_in == 0 || params->codec.ch_out == 0) 483fb4a9779SVinod Koul return -EINVAL; 484fb4a9779SVinod Koul 485fb4a9779SVinod Koul if (!(params->codec.sample_rate & SNDRV_PCM_RATE_8000_192000)) 486fb4a9779SVinod Koul return -EINVAL; 487fb4a9779SVinod Koul 4884dc040a0SVinod Koul return 0; 4894dc040a0SVinod Koul } 4904dc040a0SVinod Koul 491b21c60a4SVinod Koul static int 492b21c60a4SVinod Koul snd_compr_set_params(struct snd_compr_stream *stream, unsigned long arg) 493b21c60a4SVinod Koul { 494b21c60a4SVinod Koul struct snd_compr_params *params; 495b21c60a4SVinod Koul int retval; 496b21c60a4SVinod Koul 497b21c60a4SVinod Koul if (stream->runtime->state == SNDRV_PCM_STATE_OPEN) { 498b21c60a4SVinod Koul /* 499b21c60a4SVinod Koul * we should allow parameter change only when stream has been 500b21c60a4SVinod Koul * opened not in other cases 501b21c60a4SVinod Koul */ 502b21c60a4SVinod Koul params = kmalloc(sizeof(*params), GFP_KERNEL); 503b21c60a4SVinod Koul if (!params) 504b21c60a4SVinod Koul return -ENOMEM; 505769fab2aSJesper Juhl if (copy_from_user(params, (void __user *)arg, sizeof(*params))) { 506769fab2aSJesper Juhl retval = -EFAULT; 507769fab2aSJesper Juhl goto out; 508769fab2aSJesper Juhl } 5094dc040a0SVinod Koul 5104dc040a0SVinod Koul retval = snd_compress_check_input(params); 5114dc040a0SVinod Koul if (retval) 5124dc040a0SVinod Koul goto out; 5134dc040a0SVinod Koul 514b21c60a4SVinod Koul retval = snd_compr_allocate_buffer(stream, params); 515b21c60a4SVinod Koul if (retval) { 516769fab2aSJesper Juhl retval = -ENOMEM; 517769fab2aSJesper Juhl goto out; 518b21c60a4SVinod Koul } 5194dc040a0SVinod Koul 520b21c60a4SVinod Koul retval = stream->ops->set_params(stream, params); 521b21c60a4SVinod Koul if (retval) 522b21c60a4SVinod Koul goto out; 52349bb6402SCharles Keepax 5249727b490SJeeja KP stream->metadata_set = false; 5259727b490SJeeja KP stream->next_track = false; 52649bb6402SCharles Keepax 52749bb6402SCharles Keepax if (stream->direction == SND_COMPRESS_PLAYBACK) 52849bb6402SCharles Keepax stream->runtime->state = SNDRV_PCM_STATE_SETUP; 52949bb6402SCharles Keepax else 53049bb6402SCharles Keepax stream->runtime->state = SNDRV_PCM_STATE_PREPARED; 531769fab2aSJesper Juhl } else { 532b21c60a4SVinod Koul return -EPERM; 533769fab2aSJesper Juhl } 534b21c60a4SVinod Koul out: 535b21c60a4SVinod Koul kfree(params); 536b21c60a4SVinod Koul return retval; 537b21c60a4SVinod Koul } 538b21c60a4SVinod Koul 539b21c60a4SVinod Koul static int 540b21c60a4SVinod Koul snd_compr_get_params(struct snd_compr_stream *stream, unsigned long arg) 541b21c60a4SVinod Koul { 542b21c60a4SVinod Koul struct snd_codec *params; 543b21c60a4SVinod Koul int retval; 544b21c60a4SVinod Koul 545b21c60a4SVinod Koul if (!stream->ops->get_params) 546b21c60a4SVinod Koul return -EBADFD; 547b21c60a4SVinod Koul 54847966e97STakashi Iwai params = kzalloc(sizeof(*params), GFP_KERNEL); 549b21c60a4SVinod Koul if (!params) 550b21c60a4SVinod Koul return -ENOMEM; 551b21c60a4SVinod Koul retval = stream->ops->get_params(stream, params); 552b21c60a4SVinod Koul if (retval) 553b21c60a4SVinod Koul goto out; 554b21c60a4SVinod Koul if (copy_to_user((char __user *)arg, params, sizeof(*params))) 555b21c60a4SVinod Koul retval = -EFAULT; 556b21c60a4SVinod Koul 557b21c60a4SVinod Koul out: 558b21c60a4SVinod Koul kfree(params); 559b21c60a4SVinod Koul return retval; 560b21c60a4SVinod Koul } 561b21c60a4SVinod Koul 5629727b490SJeeja KP static int 5639727b490SJeeja KP snd_compr_get_metadata(struct snd_compr_stream *stream, unsigned long arg) 5649727b490SJeeja KP { 5659727b490SJeeja KP struct snd_compr_metadata metadata; 5669727b490SJeeja KP int retval; 5679727b490SJeeja KP 5689727b490SJeeja KP if (!stream->ops->get_metadata) 5699727b490SJeeja KP return -ENXIO; 5709727b490SJeeja KP 5719727b490SJeeja KP if (copy_from_user(&metadata, (void __user *)arg, sizeof(metadata))) 5729727b490SJeeja KP return -EFAULT; 5739727b490SJeeja KP 5749727b490SJeeja KP retval = stream->ops->get_metadata(stream, &metadata); 5759727b490SJeeja KP if (retval != 0) 5769727b490SJeeja KP return retval; 5779727b490SJeeja KP 5789727b490SJeeja KP if (copy_to_user((void __user *)arg, &metadata, sizeof(metadata))) 5799727b490SJeeja KP return -EFAULT; 5809727b490SJeeja KP 5819727b490SJeeja KP return 0; 5829727b490SJeeja KP } 5839727b490SJeeja KP 5849727b490SJeeja KP static int 5859727b490SJeeja KP snd_compr_set_metadata(struct snd_compr_stream *stream, unsigned long arg) 5869727b490SJeeja KP { 5879727b490SJeeja KP struct snd_compr_metadata metadata; 5889727b490SJeeja KP int retval; 5899727b490SJeeja KP 5909727b490SJeeja KP if (!stream->ops->set_metadata) 5919727b490SJeeja KP return -ENXIO; 5929727b490SJeeja KP /* 5939727b490SJeeja KP * we should allow parameter change only when stream has been 5949727b490SJeeja KP * opened not in other cases 5959727b490SJeeja KP */ 5969727b490SJeeja KP if (copy_from_user(&metadata, (void __user *)arg, sizeof(metadata))) 5979727b490SJeeja KP return -EFAULT; 5989727b490SJeeja KP 5999727b490SJeeja KP retval = stream->ops->set_metadata(stream, &metadata); 6009727b490SJeeja KP stream->metadata_set = true; 6019727b490SJeeja KP 6029727b490SJeeja KP return retval; 6039727b490SJeeja KP } 6049727b490SJeeja KP 605b21c60a4SVinod Koul static inline int 606b21c60a4SVinod Koul snd_compr_tstamp(struct snd_compr_stream *stream, unsigned long arg) 607b21c60a4SVinod Koul { 60817ac8e5cSRichard Fitzgerald struct snd_compr_tstamp tstamp = {0}; 60917ac8e5cSRichard Fitzgerald int ret; 610b21c60a4SVinod Koul 61117ac8e5cSRichard Fitzgerald ret = snd_compr_update_tstamp(stream, &tstamp); 61217ac8e5cSRichard Fitzgerald if (ret == 0) 61317ac8e5cSRichard Fitzgerald ret = copy_to_user((struct snd_compr_tstamp __user *)arg, 614b21c60a4SVinod Koul &tstamp, sizeof(tstamp)) ? -EFAULT : 0; 61517ac8e5cSRichard Fitzgerald return ret; 616b21c60a4SVinod Koul } 617b21c60a4SVinod Koul 618b21c60a4SVinod Koul static int snd_compr_pause(struct snd_compr_stream *stream) 619b21c60a4SVinod Koul { 620b21c60a4SVinod Koul int retval; 621b21c60a4SVinod Koul 622b21c60a4SVinod Koul if (stream->runtime->state != SNDRV_PCM_STATE_RUNNING) 623b21c60a4SVinod Koul return -EPERM; 624b21c60a4SVinod Koul retval = stream->ops->trigger(stream, SNDRV_PCM_TRIGGER_PAUSE_PUSH); 6256b18f793SVinod Koul if (!retval) 626b21c60a4SVinod Koul stream->runtime->state = SNDRV_PCM_STATE_PAUSED; 627b21c60a4SVinod Koul return retval; 628b21c60a4SVinod Koul } 629b21c60a4SVinod Koul 630b21c60a4SVinod Koul static int snd_compr_resume(struct snd_compr_stream *stream) 631b21c60a4SVinod Koul { 632b21c60a4SVinod Koul int retval; 633b21c60a4SVinod Koul 634b21c60a4SVinod Koul if (stream->runtime->state != SNDRV_PCM_STATE_PAUSED) 635b21c60a4SVinod Koul return -EPERM; 636b21c60a4SVinod Koul retval = stream->ops->trigger(stream, SNDRV_PCM_TRIGGER_PAUSE_RELEASE); 637b21c60a4SVinod Koul if (!retval) 638b21c60a4SVinod Koul stream->runtime->state = SNDRV_PCM_STATE_RUNNING; 639b21c60a4SVinod Koul return retval; 640b21c60a4SVinod Koul } 641b21c60a4SVinod Koul 642b21c60a4SVinod Koul static int snd_compr_start(struct snd_compr_stream *stream) 643b21c60a4SVinod Koul { 644b21c60a4SVinod Koul int retval; 645b21c60a4SVinod Koul 646b21c60a4SVinod Koul if (stream->runtime->state != SNDRV_PCM_STATE_PREPARED) 647b21c60a4SVinod Koul return -EPERM; 648b21c60a4SVinod Koul retval = stream->ops->trigger(stream, SNDRV_PCM_TRIGGER_START); 649b21c60a4SVinod Koul if (!retval) 650b21c60a4SVinod Koul stream->runtime->state = SNDRV_PCM_STATE_RUNNING; 651b21c60a4SVinod Koul return retval; 652b21c60a4SVinod Koul } 653b21c60a4SVinod Koul 654b21c60a4SVinod Koul static int snd_compr_stop(struct snd_compr_stream *stream) 655b21c60a4SVinod Koul { 656b21c60a4SVinod Koul int retval; 657b21c60a4SVinod Koul 658b21c60a4SVinod Koul if (stream->runtime->state == SNDRV_PCM_STATE_PREPARED || 659b21c60a4SVinod Koul stream->runtime->state == SNDRV_PCM_STATE_SETUP) 660b21c60a4SVinod Koul return -EPERM; 661b21c60a4SVinod Koul retval = stream->ops->trigger(stream, SNDRV_PCM_TRIGGER_STOP); 662b21c60a4SVinod Koul if (!retval) { 663b21c60a4SVinod Koul stream->runtime->state = SNDRV_PCM_STATE_SETUP; 664b21c60a4SVinod Koul wake_up(&stream->runtime->sleep); 6658b21460aSVinod Koul stream->runtime->total_bytes_available = 0; 6668b21460aSVinod Koul stream->runtime->total_bytes_transferred = 0; 667b21c60a4SVinod Koul } 668b21c60a4SVinod Koul return retval; 669b21c60a4SVinod Koul } 670b21c60a4SVinod Koul 671b21c60a4SVinod Koul static int snd_compr_drain(struct snd_compr_stream *stream) 672b21c60a4SVinod Koul { 673b21c60a4SVinod Koul int retval; 674b21c60a4SVinod Koul 675b21c60a4SVinod Koul if (stream->runtime->state == SNDRV_PCM_STATE_PREPARED || 676b21c60a4SVinod Koul stream->runtime->state == SNDRV_PCM_STATE_SETUP) 677b21c60a4SVinod Koul return -EPERM; 678b21c60a4SVinod Koul retval = stream->ops->trigger(stream, SND_COMPR_TRIGGER_DRAIN); 679b21c60a4SVinod Koul if (!retval) { 680b21c60a4SVinod Koul stream->runtime->state = SNDRV_PCM_STATE_DRAINING; 681b21c60a4SVinod Koul wake_up(&stream->runtime->sleep); 682b21c60a4SVinod Koul } 683b21c60a4SVinod Koul return retval; 684b21c60a4SVinod Koul } 685b21c60a4SVinod Koul 6869727b490SJeeja KP static int snd_compr_next_track(struct snd_compr_stream *stream) 6879727b490SJeeja KP { 6889727b490SJeeja KP int retval; 6899727b490SJeeja KP 6909727b490SJeeja KP /* only a running stream can transition to next track */ 6919727b490SJeeja KP if (stream->runtime->state != SNDRV_PCM_STATE_RUNNING) 6929727b490SJeeja KP return -EPERM; 6939727b490SJeeja KP 6949727b490SJeeja KP /* you can signal next track isf this is intended to be a gapless stream 6959727b490SJeeja KP * and current track metadata is set 6969727b490SJeeja KP */ 6979727b490SJeeja KP if (stream->metadata_set == false) 6989727b490SJeeja KP return -EPERM; 6999727b490SJeeja KP 7009727b490SJeeja KP retval = stream->ops->trigger(stream, SND_COMPR_TRIGGER_NEXT_TRACK); 7019727b490SJeeja KP if (retval != 0) 7029727b490SJeeja KP return retval; 7039727b490SJeeja KP stream->metadata_set = false; 7049727b490SJeeja KP stream->next_track = true; 7059727b490SJeeja KP return 0; 7069727b490SJeeja KP } 7079727b490SJeeja KP 7089727b490SJeeja KP static int snd_compr_partial_drain(struct snd_compr_stream *stream) 7099727b490SJeeja KP { 7109727b490SJeeja KP int retval; 7119727b490SJeeja KP if (stream->runtime->state == SNDRV_PCM_STATE_PREPARED || 7129727b490SJeeja KP stream->runtime->state == SNDRV_PCM_STATE_SETUP) 7139727b490SJeeja KP return -EPERM; 7149727b490SJeeja KP /* stream can be drained only when next track has been signalled */ 7159727b490SJeeja KP if (stream->next_track == false) 7169727b490SJeeja KP return -EPERM; 7179727b490SJeeja KP 7189727b490SJeeja KP retval = stream->ops->trigger(stream, SND_COMPR_TRIGGER_PARTIAL_DRAIN); 7199727b490SJeeja KP 7209727b490SJeeja KP stream->next_track = false; 7219727b490SJeeja KP return retval; 7229727b490SJeeja KP } 7239727b490SJeeja KP 724b21c60a4SVinod Koul static long snd_compr_ioctl(struct file *f, unsigned int cmd, unsigned long arg) 725b21c60a4SVinod Koul { 726b21c60a4SVinod Koul struct snd_compr_file *data = f->private_data; 727b21c60a4SVinod Koul struct snd_compr_stream *stream; 728b21c60a4SVinod Koul int retval = -ENOTTY; 729b21c60a4SVinod Koul 730b21c60a4SVinod Koul if (snd_BUG_ON(!data)) 731b21c60a4SVinod Koul return -EFAULT; 732b21c60a4SVinod Koul stream = &data->stream; 733b21c60a4SVinod Koul if (snd_BUG_ON(!stream)) 734b21c60a4SVinod Koul return -EFAULT; 735b21c60a4SVinod Koul mutex_lock(&stream->device->lock); 736b21c60a4SVinod Koul switch (_IOC_NR(cmd)) { 737b21c60a4SVinod Koul case _IOC_NR(SNDRV_COMPRESS_IOCTL_VERSION): 738b21c60a4SVinod Koul put_user(SNDRV_COMPRESS_VERSION, 739b21c60a4SVinod Koul (int __user *)arg) ? -EFAULT : 0; 740b21c60a4SVinod Koul break; 741b21c60a4SVinod Koul case _IOC_NR(SNDRV_COMPRESS_GET_CAPS): 742b21c60a4SVinod Koul retval = snd_compr_get_caps(stream, arg); 743b21c60a4SVinod Koul break; 744b21c60a4SVinod Koul case _IOC_NR(SNDRV_COMPRESS_GET_CODEC_CAPS): 745b21c60a4SVinod Koul retval = snd_compr_get_codec_caps(stream, arg); 746b21c60a4SVinod Koul break; 747b21c60a4SVinod Koul case _IOC_NR(SNDRV_COMPRESS_SET_PARAMS): 748b21c60a4SVinod Koul retval = snd_compr_set_params(stream, arg); 749b21c60a4SVinod Koul break; 750b21c60a4SVinod Koul case _IOC_NR(SNDRV_COMPRESS_GET_PARAMS): 751b21c60a4SVinod Koul retval = snd_compr_get_params(stream, arg); 752b21c60a4SVinod Koul break; 7539727b490SJeeja KP case _IOC_NR(SNDRV_COMPRESS_SET_METADATA): 7549727b490SJeeja KP retval = snd_compr_set_metadata(stream, arg); 7559727b490SJeeja KP break; 7569727b490SJeeja KP case _IOC_NR(SNDRV_COMPRESS_GET_METADATA): 7579727b490SJeeja KP retval = snd_compr_get_metadata(stream, arg); 7589727b490SJeeja KP break; 759b21c60a4SVinod Koul case _IOC_NR(SNDRV_COMPRESS_TSTAMP): 760b21c60a4SVinod Koul retval = snd_compr_tstamp(stream, arg); 761b21c60a4SVinod Koul break; 762b21c60a4SVinod Koul case _IOC_NR(SNDRV_COMPRESS_AVAIL): 763b21c60a4SVinod Koul retval = snd_compr_ioctl_avail(stream, arg); 764b21c60a4SVinod Koul break; 765b21c60a4SVinod Koul case _IOC_NR(SNDRV_COMPRESS_PAUSE): 766b21c60a4SVinod Koul retval = snd_compr_pause(stream); 767b21c60a4SVinod Koul break; 768b21c60a4SVinod Koul case _IOC_NR(SNDRV_COMPRESS_RESUME): 769b21c60a4SVinod Koul retval = snd_compr_resume(stream); 770b21c60a4SVinod Koul break; 771b21c60a4SVinod Koul case _IOC_NR(SNDRV_COMPRESS_START): 772b21c60a4SVinod Koul retval = snd_compr_start(stream); 773b21c60a4SVinod Koul break; 774b21c60a4SVinod Koul case _IOC_NR(SNDRV_COMPRESS_STOP): 775b21c60a4SVinod Koul retval = snd_compr_stop(stream); 776b21c60a4SVinod Koul break; 777b21c60a4SVinod Koul case _IOC_NR(SNDRV_COMPRESS_DRAIN): 778b21c60a4SVinod Koul retval = snd_compr_drain(stream); 779b21c60a4SVinod Koul break; 7809727b490SJeeja KP case _IOC_NR(SNDRV_COMPRESS_PARTIAL_DRAIN): 7819727b490SJeeja KP retval = snd_compr_partial_drain(stream); 7829727b490SJeeja KP break; 7839727b490SJeeja KP case _IOC_NR(SNDRV_COMPRESS_NEXT_TRACK): 7849727b490SJeeja KP retval = snd_compr_next_track(stream); 7859727b490SJeeja KP break; 7869727b490SJeeja KP 787b21c60a4SVinod Koul } 788b21c60a4SVinod Koul mutex_unlock(&stream->device->lock); 789b21c60a4SVinod Koul return retval; 790b21c60a4SVinod Koul } 791b21c60a4SVinod Koul 792b21c60a4SVinod Koul static const struct file_operations snd_compr_file_ops = { 793b21c60a4SVinod Koul .owner = THIS_MODULE, 794b21c60a4SVinod Koul .open = snd_compr_open, 795b21c60a4SVinod Koul .release = snd_compr_free, 796b21c60a4SVinod Koul .write = snd_compr_write, 797b21c60a4SVinod Koul .read = snd_compr_read, 798b21c60a4SVinod Koul .unlocked_ioctl = snd_compr_ioctl, 799b21c60a4SVinod Koul .mmap = snd_compr_mmap, 800b21c60a4SVinod Koul .poll = snd_compr_poll, 801b21c60a4SVinod Koul }; 802b21c60a4SVinod Koul 803b21c60a4SVinod Koul static int snd_compress_dev_register(struct snd_device *device) 804b21c60a4SVinod Koul { 805b21c60a4SVinod Koul int ret = -EINVAL; 806b21c60a4SVinod Koul char str[16]; 807b21c60a4SVinod Koul struct snd_compr *compr; 808b21c60a4SVinod Koul 809b21c60a4SVinod Koul if (snd_BUG_ON(!device || !device->device_data)) 810b21c60a4SVinod Koul return -EBADFD; 811b21c60a4SVinod Koul compr = device->device_data; 812b21c60a4SVinod Koul 813b21c60a4SVinod Koul sprintf(str, "comprC%iD%i", compr->card->number, compr->device); 814b21c60a4SVinod Koul pr_debug("reg %s for device %s, direction %d\n", str, compr->name, 815b21c60a4SVinod Koul compr->direction); 816b21c60a4SVinod Koul /* register compressed device */ 817b21c60a4SVinod Koul ret = snd_register_device(SNDRV_DEVICE_TYPE_COMPRESS, compr->card, 818b21c60a4SVinod Koul compr->device, &snd_compr_file_ops, compr, str); 819b21c60a4SVinod Koul if (ret < 0) { 820b21c60a4SVinod Koul pr_err("snd_register_device failed\n %d", ret); 821b21c60a4SVinod Koul return ret; 822b21c60a4SVinod Koul } 823b21c60a4SVinod Koul return ret; 824b21c60a4SVinod Koul 825b21c60a4SVinod Koul } 826b21c60a4SVinod Koul 827b21c60a4SVinod Koul static int snd_compress_dev_disconnect(struct snd_device *device) 828b21c60a4SVinod Koul { 829b21c60a4SVinod Koul struct snd_compr *compr; 830b21c60a4SVinod Koul 831b21c60a4SVinod Koul compr = device->device_data; 832b21c60a4SVinod Koul snd_unregister_device(compr->direction, compr->card, compr->device); 833b21c60a4SVinod Koul return 0; 834b21c60a4SVinod Koul } 835b21c60a4SVinod Koul 836b21c60a4SVinod Koul /* 837b21c60a4SVinod Koul * snd_compress_new: create new compress device 838b21c60a4SVinod Koul * @card: sound card pointer 839b21c60a4SVinod Koul * @device: device number 840b21c60a4SVinod Koul * @dirn: device direction, should be of type enum snd_compr_direction 841b21c60a4SVinod Koul * @compr: compress device pointer 842b21c60a4SVinod Koul */ 843b21c60a4SVinod Koul int snd_compress_new(struct snd_card *card, int device, 844b21c60a4SVinod Koul int dirn, struct snd_compr *compr) 845b21c60a4SVinod Koul { 846b21c60a4SVinod Koul static struct snd_device_ops ops = { 847b21c60a4SVinod Koul .dev_free = NULL, 848b21c60a4SVinod Koul .dev_register = snd_compress_dev_register, 849b21c60a4SVinod Koul .dev_disconnect = snd_compress_dev_disconnect, 850b21c60a4SVinod Koul }; 851b21c60a4SVinod Koul 852b21c60a4SVinod Koul compr->card = card; 853b21c60a4SVinod Koul compr->device = device; 854b21c60a4SVinod Koul compr->direction = dirn; 855b21c60a4SVinod Koul return snd_device_new(card, SNDRV_DEV_COMPRESS, compr, &ops); 856b21c60a4SVinod Koul } 857b21c60a4SVinod Koul EXPORT_SYMBOL_GPL(snd_compress_new); 858b21c60a4SVinod Koul 859b21c60a4SVinod Koul static int snd_compress_add_device(struct snd_compr *device) 860b21c60a4SVinod Koul { 861b21c60a4SVinod Koul int ret; 862b21c60a4SVinod Koul 863b21c60a4SVinod Koul if (!device->card) 864b21c60a4SVinod Koul return -EINVAL; 865b21c60a4SVinod Koul 866b21c60a4SVinod Koul /* register the card */ 867b21c60a4SVinod Koul ret = snd_card_register(device->card); 868b21c60a4SVinod Koul if (ret) 869b21c60a4SVinod Koul goto out; 870b21c60a4SVinod Koul return 0; 871b21c60a4SVinod Koul 872b21c60a4SVinod Koul out: 873b21c60a4SVinod Koul pr_err("failed with %d\n", ret); 874b21c60a4SVinod Koul return ret; 875b21c60a4SVinod Koul 876b21c60a4SVinod Koul } 877b21c60a4SVinod Koul 878b21c60a4SVinod Koul static int snd_compress_remove_device(struct snd_compr *device) 879b21c60a4SVinod Koul { 880b21c60a4SVinod Koul return snd_card_free(device->card); 881b21c60a4SVinod Koul } 882b21c60a4SVinod Koul 883b21c60a4SVinod Koul /** 884b21c60a4SVinod Koul * snd_compress_register - register compressed device 885b21c60a4SVinod Koul * 886b21c60a4SVinod Koul * @device: compressed device to register 887b21c60a4SVinod Koul */ 888b21c60a4SVinod Koul int snd_compress_register(struct snd_compr *device) 889b21c60a4SVinod Koul { 890b21c60a4SVinod Koul int retval; 891b21c60a4SVinod Koul 892b21c60a4SVinod Koul if (device->name == NULL || device->dev == NULL || device->ops == NULL) 893b21c60a4SVinod Koul return -EINVAL; 894b21c60a4SVinod Koul 895b21c60a4SVinod Koul pr_debug("Registering compressed device %s\n", device->name); 896b21c60a4SVinod Koul if (snd_BUG_ON(!device->ops->open)) 897b21c60a4SVinod Koul return -EINVAL; 898b21c60a4SVinod Koul if (snd_BUG_ON(!device->ops->free)) 899b21c60a4SVinod Koul return -EINVAL; 900b21c60a4SVinod Koul if (snd_BUG_ON(!device->ops->set_params)) 901b21c60a4SVinod Koul return -EINVAL; 902b21c60a4SVinod Koul if (snd_BUG_ON(!device->ops->trigger)) 903b21c60a4SVinod Koul return -EINVAL; 904b21c60a4SVinod Koul 905b21c60a4SVinod Koul mutex_init(&device->lock); 906b21c60a4SVinod Koul 907b21c60a4SVinod Koul /* register a compressed card */ 908b21c60a4SVinod Koul mutex_lock(&device_mutex); 909b21c60a4SVinod Koul retval = snd_compress_add_device(device); 910b21c60a4SVinod Koul mutex_unlock(&device_mutex); 911b21c60a4SVinod Koul return retval; 912b21c60a4SVinod Koul } 913b21c60a4SVinod Koul EXPORT_SYMBOL_GPL(snd_compress_register); 914b21c60a4SVinod Koul 915b21c60a4SVinod Koul int snd_compress_deregister(struct snd_compr *device) 916b21c60a4SVinod Koul { 917b21c60a4SVinod Koul pr_debug("Removing compressed device %s\n", device->name); 918b21c60a4SVinod Koul mutex_lock(&device_mutex); 919b21c60a4SVinod Koul snd_compress_remove_device(device); 920b21c60a4SVinod Koul mutex_unlock(&device_mutex); 921b21c60a4SVinod Koul return 0; 922b21c60a4SVinod Koul } 923b21c60a4SVinod Koul EXPORT_SYMBOL_GPL(snd_compress_deregister); 924b21c60a4SVinod Koul 925b21c60a4SVinod Koul static int __init snd_compress_init(void) 926b21c60a4SVinod Koul { 927b21c60a4SVinod Koul return 0; 928b21c60a4SVinod Koul } 929b21c60a4SVinod Koul 930b21c60a4SVinod Koul static void __exit snd_compress_exit(void) 931b21c60a4SVinod Koul { 932b21c60a4SVinod Koul } 933b21c60a4SVinod Koul 934b21c60a4SVinod Koul module_init(snd_compress_init); 935b21c60a4SVinod Koul module_exit(snd_compress_exit); 936b21c60a4SVinod Koul 937b21c60a4SVinod Koul MODULE_DESCRIPTION("ALSA Compressed offload framework"); 938b21c60a4SVinod Koul MODULE_AUTHOR("Vinod Koul <vinod.koul@linux.intel.com>"); 939b21c60a4SVinod Koul MODULE_LICENSE("GPL v2"); 940