Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame^] | 1 | /* |
| 2 | * Digital Audio (PCM) abstract layer / OSS compatible |
| 3 | * Copyright (c) by Jaroslav Kysela <perex@suse.cz> |
| 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 | |
| 22 | #if 0 |
| 23 | #define PLUGIN_DEBUG |
| 24 | #endif |
| 25 | #if 0 |
| 26 | #define OSS_DEBUG |
| 27 | #endif |
| 28 | |
| 29 | #include <sound/driver.h> |
| 30 | #include <linux/init.h> |
| 31 | #include <linux/smp_lock.h> |
| 32 | #include <linux/slab.h> |
| 33 | #include <linux/time.h> |
| 34 | #include <linux/vmalloc.h> |
| 35 | #include <linux/moduleparam.h> |
| 36 | #include <sound/core.h> |
| 37 | #include <sound/minors.h> |
| 38 | #include <sound/pcm.h> |
| 39 | #include <sound/pcm_params.h> |
| 40 | #include "pcm_plugin.h" |
| 41 | #include <sound/info.h> |
| 42 | #include <linux/soundcard.h> |
| 43 | #include <sound/initval.h> |
| 44 | |
| 45 | #define OSS_ALSAEMULVER _SIOR ('M', 249, int) |
| 46 | |
| 47 | static int dsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 0}; |
| 48 | static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1}; |
| 49 | static int nonblock_open = 1; |
| 50 | |
| 51 | MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>, Abramo Bagnara <abramo@alsa-project.org>"); |
| 52 | MODULE_DESCRIPTION("PCM OSS emulation for ALSA."); |
| 53 | MODULE_LICENSE("GPL"); |
| 54 | module_param_array(dsp_map, int, NULL, 0444); |
| 55 | MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device."); |
| 56 | module_param_array(adsp_map, int, NULL, 0444); |
| 57 | MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device."); |
| 58 | module_param(nonblock_open, bool, 0644); |
| 59 | MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices."); |
| 60 | MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM); |
| 61 | MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1); |
| 62 | |
| 63 | extern int snd_mixer_oss_ioctl_card(snd_card_t *card, unsigned int cmd, unsigned long arg); |
| 64 | static int snd_pcm_oss_get_rate(snd_pcm_oss_file_t *pcm_oss_file); |
| 65 | static int snd_pcm_oss_get_channels(snd_pcm_oss_file_t *pcm_oss_file); |
| 66 | static int snd_pcm_oss_get_format(snd_pcm_oss_file_t *pcm_oss_file); |
| 67 | |
| 68 | static inline mm_segment_t snd_enter_user(void) |
| 69 | { |
| 70 | mm_segment_t fs = get_fs(); |
| 71 | set_fs(get_ds()); |
| 72 | return fs; |
| 73 | } |
| 74 | |
| 75 | static inline void snd_leave_user(mm_segment_t fs) |
| 76 | { |
| 77 | set_fs(fs); |
| 78 | } |
| 79 | |
| 80 | static int snd_pcm_oss_plugin_clear(snd_pcm_substream_t *substream) |
| 81 | { |
| 82 | snd_pcm_runtime_t *runtime = substream->runtime; |
| 83 | snd_pcm_plugin_t *plugin, *next; |
| 84 | |
| 85 | plugin = runtime->oss.plugin_first; |
| 86 | while (plugin) { |
| 87 | next = plugin->next; |
| 88 | snd_pcm_plugin_free(plugin); |
| 89 | plugin = next; |
| 90 | } |
| 91 | runtime->oss.plugin_first = runtime->oss.plugin_last = NULL; |
| 92 | return 0; |
| 93 | } |
| 94 | |
| 95 | static int snd_pcm_plugin_insert(snd_pcm_plugin_t *plugin) |
| 96 | { |
| 97 | snd_pcm_runtime_t *runtime = plugin->plug->runtime; |
| 98 | plugin->next = runtime->oss.plugin_first; |
| 99 | plugin->prev = NULL; |
| 100 | if (runtime->oss.plugin_first) { |
| 101 | runtime->oss.plugin_first->prev = plugin; |
| 102 | runtime->oss.plugin_first = plugin; |
| 103 | } else { |
| 104 | runtime->oss.plugin_last = |
| 105 | runtime->oss.plugin_first = plugin; |
| 106 | } |
| 107 | return 0; |
| 108 | } |
| 109 | |
| 110 | int snd_pcm_plugin_append(snd_pcm_plugin_t *plugin) |
| 111 | { |
| 112 | snd_pcm_runtime_t *runtime = plugin->plug->runtime; |
| 113 | plugin->next = NULL; |
| 114 | plugin->prev = runtime->oss.plugin_last; |
| 115 | if (runtime->oss.plugin_last) { |
| 116 | runtime->oss.plugin_last->next = plugin; |
| 117 | runtime->oss.plugin_last = plugin; |
| 118 | } else { |
| 119 | runtime->oss.plugin_last = |
| 120 | runtime->oss.plugin_first = plugin; |
| 121 | } |
| 122 | return 0; |
| 123 | } |
| 124 | |
| 125 | static long snd_pcm_oss_bytes(snd_pcm_substream_t *substream, long frames) |
| 126 | { |
| 127 | snd_pcm_runtime_t *runtime = substream->runtime; |
| 128 | snd_pcm_uframes_t buffer_size = snd_pcm_lib_buffer_bytes(substream); |
| 129 | frames = frames_to_bytes(runtime, frames); |
| 130 | if (buffer_size == runtime->oss.buffer_bytes) |
| 131 | return frames; |
| 132 | return (runtime->oss.buffer_bytes * frames) / buffer_size; |
| 133 | } |
| 134 | |
| 135 | static long snd_pcm_alsa_frames(snd_pcm_substream_t *substream, long bytes) |
| 136 | { |
| 137 | snd_pcm_runtime_t *runtime = substream->runtime; |
| 138 | snd_pcm_uframes_t buffer_size = snd_pcm_lib_buffer_bytes(substream); |
| 139 | if (buffer_size == runtime->oss.buffer_bytes) |
| 140 | return bytes_to_frames(runtime, bytes); |
| 141 | return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes); |
| 142 | } |
| 143 | |
| 144 | static int snd_pcm_oss_format_from(int format) |
| 145 | { |
| 146 | switch (format) { |
| 147 | case AFMT_MU_LAW: return SNDRV_PCM_FORMAT_MU_LAW; |
| 148 | case AFMT_A_LAW: return SNDRV_PCM_FORMAT_A_LAW; |
| 149 | case AFMT_IMA_ADPCM: return SNDRV_PCM_FORMAT_IMA_ADPCM; |
| 150 | case AFMT_U8: return SNDRV_PCM_FORMAT_U8; |
| 151 | case AFMT_S16_LE: return SNDRV_PCM_FORMAT_S16_LE; |
| 152 | case AFMT_S16_BE: return SNDRV_PCM_FORMAT_S16_BE; |
| 153 | case AFMT_S8: return SNDRV_PCM_FORMAT_S8; |
| 154 | case AFMT_U16_LE: return SNDRV_PCM_FORMAT_U16_LE; |
| 155 | case AFMT_U16_BE: return SNDRV_PCM_FORMAT_U16_BE; |
| 156 | case AFMT_MPEG: return SNDRV_PCM_FORMAT_MPEG; |
| 157 | default: return SNDRV_PCM_FORMAT_U8; |
| 158 | } |
| 159 | } |
| 160 | |
| 161 | static int snd_pcm_oss_format_to(int format) |
| 162 | { |
| 163 | switch (format) { |
| 164 | case SNDRV_PCM_FORMAT_MU_LAW: return AFMT_MU_LAW; |
| 165 | case SNDRV_PCM_FORMAT_A_LAW: return AFMT_A_LAW; |
| 166 | case SNDRV_PCM_FORMAT_IMA_ADPCM: return AFMT_IMA_ADPCM; |
| 167 | case SNDRV_PCM_FORMAT_U8: return AFMT_U8; |
| 168 | case SNDRV_PCM_FORMAT_S16_LE: return AFMT_S16_LE; |
| 169 | case SNDRV_PCM_FORMAT_S16_BE: return AFMT_S16_BE; |
| 170 | case SNDRV_PCM_FORMAT_S8: return AFMT_S8; |
| 171 | case SNDRV_PCM_FORMAT_U16_LE: return AFMT_U16_LE; |
| 172 | case SNDRV_PCM_FORMAT_U16_BE: return AFMT_U16_BE; |
| 173 | case SNDRV_PCM_FORMAT_MPEG: return AFMT_MPEG; |
| 174 | default: return -EINVAL; |
| 175 | } |
| 176 | } |
| 177 | |
| 178 | static int snd_pcm_oss_period_size(snd_pcm_substream_t *substream, |
| 179 | snd_pcm_hw_params_t *oss_params, |
| 180 | snd_pcm_hw_params_t *slave_params) |
| 181 | { |
| 182 | size_t s; |
| 183 | size_t oss_buffer_size, oss_period_size, oss_periods; |
| 184 | size_t min_period_size, max_period_size; |
| 185 | snd_pcm_runtime_t *runtime = substream->runtime; |
| 186 | size_t oss_frame_size; |
| 187 | |
| 188 | oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) * |
| 189 | params_channels(oss_params) / 8; |
| 190 | |
| 191 | oss_buffer_size = snd_pcm_plug_client_size(substream, |
| 192 | snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size; |
| 193 | oss_buffer_size = 1 << ld2(oss_buffer_size); |
| 194 | if (atomic_read(&runtime->mmap_count)) { |
| 195 | if (oss_buffer_size > runtime->oss.mmap_bytes) |
| 196 | oss_buffer_size = runtime->oss.mmap_bytes; |
| 197 | } |
| 198 | |
| 199 | if (substream->oss.setup && |
| 200 | substream->oss.setup->period_size > 16) |
| 201 | oss_period_size = substream->oss.setup->period_size; |
| 202 | else if (runtime->oss.fragshift) { |
| 203 | oss_period_size = 1 << runtime->oss.fragshift; |
| 204 | if (oss_period_size > oss_buffer_size / 2) |
| 205 | oss_period_size = oss_buffer_size / 2; |
| 206 | } else { |
| 207 | int sd; |
| 208 | size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8; |
| 209 | |
| 210 | oss_period_size = oss_buffer_size; |
| 211 | do { |
| 212 | oss_period_size /= 2; |
| 213 | } while (oss_period_size > bytes_per_sec); |
| 214 | if (runtime->oss.subdivision == 0) { |
| 215 | sd = 4; |
| 216 | if (oss_period_size / sd > 4096) |
| 217 | sd *= 2; |
| 218 | if (oss_period_size / sd < 4096) |
| 219 | sd = 1; |
| 220 | } else |
| 221 | sd = runtime->oss.subdivision; |
| 222 | oss_period_size /= sd; |
| 223 | if (oss_period_size < 16) |
| 224 | oss_period_size = 16; |
| 225 | } |
| 226 | |
| 227 | min_period_size = snd_pcm_plug_client_size(substream, |
| 228 | snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL)); |
| 229 | min_period_size *= oss_frame_size; |
| 230 | min_period_size = 1 << (ld2(min_period_size - 1) + 1); |
| 231 | if (oss_period_size < min_period_size) |
| 232 | oss_period_size = min_period_size; |
| 233 | |
| 234 | max_period_size = snd_pcm_plug_client_size(substream, |
| 235 | snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL)); |
| 236 | max_period_size *= oss_frame_size; |
| 237 | max_period_size = 1 << ld2(max_period_size); |
| 238 | if (oss_period_size > max_period_size) |
| 239 | oss_period_size = max_period_size; |
| 240 | |
| 241 | oss_periods = oss_buffer_size / oss_period_size; |
| 242 | |
| 243 | if (substream->oss.setup) { |
| 244 | if (substream->oss.setup->periods > 1) |
| 245 | oss_periods = substream->oss.setup->periods; |
| 246 | } |
| 247 | |
| 248 | s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL); |
| 249 | if (runtime->oss.maxfrags && s > runtime->oss.maxfrags) |
| 250 | s = runtime->oss.maxfrags; |
| 251 | if (oss_periods > s) |
| 252 | oss_periods = s; |
| 253 | |
| 254 | s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL); |
| 255 | if (s < 2) |
| 256 | s = 2; |
| 257 | if (oss_periods < s) |
| 258 | oss_periods = s; |
| 259 | |
| 260 | while (oss_period_size * oss_periods > oss_buffer_size) |
| 261 | oss_period_size /= 2; |
| 262 | |
| 263 | snd_assert(oss_period_size >= 16, return -EINVAL); |
| 264 | runtime->oss.period_bytes = oss_period_size; |
| 265 | runtime->oss.period_frames = 1; |
| 266 | runtime->oss.periods = oss_periods; |
| 267 | return 0; |
| 268 | } |
| 269 | |
| 270 | static int choose_rate(snd_pcm_substream_t *substream, |
| 271 | snd_pcm_hw_params_t *params, unsigned int best_rate) |
| 272 | { |
| 273 | snd_interval_t *it; |
| 274 | snd_pcm_hw_params_t *save; |
| 275 | unsigned int rate, prev; |
| 276 | |
| 277 | save = kmalloc(sizeof(*save), GFP_KERNEL); |
| 278 | if (save == NULL) |
| 279 | return -ENOMEM; |
| 280 | *save = *params; |
| 281 | it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE); |
| 282 | |
| 283 | /* try multiples of the best rate */ |
| 284 | rate = best_rate; |
| 285 | for (;;) { |
| 286 | if (it->max < rate || (it->max == rate && it->openmax)) |
| 287 | break; |
| 288 | if (it->min < rate || (it->min == rate && !it->openmin)) { |
| 289 | int ret; |
| 290 | ret = snd_pcm_hw_param_set(substream, params, |
| 291 | SNDRV_PCM_HW_PARAM_RATE, |
| 292 | rate, 0); |
| 293 | if (ret == (int)rate) { |
| 294 | kfree(save); |
| 295 | return rate; |
| 296 | } |
| 297 | *params = *save; |
| 298 | } |
| 299 | prev = rate; |
| 300 | rate += best_rate; |
| 301 | if (rate <= prev) |
| 302 | break; |
| 303 | } |
| 304 | |
| 305 | /* not found, use the nearest rate */ |
| 306 | kfree(save); |
| 307 | return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL); |
| 308 | } |
| 309 | |
| 310 | static int snd_pcm_oss_change_params(snd_pcm_substream_t *substream) |
| 311 | { |
| 312 | snd_pcm_runtime_t *runtime = substream->runtime; |
| 313 | snd_pcm_hw_params_t *params, *sparams; |
| 314 | snd_pcm_sw_params_t *sw_params; |
| 315 | ssize_t oss_buffer_size, oss_period_size; |
| 316 | size_t oss_frame_size; |
| 317 | int err; |
| 318 | int direct; |
| 319 | int format, sformat, n; |
| 320 | snd_mask_t sformat_mask; |
| 321 | snd_mask_t mask; |
| 322 | |
| 323 | sw_params = kmalloc(sizeof(*sw_params), GFP_KERNEL); |
| 324 | params = kmalloc(sizeof(*params), GFP_KERNEL); |
| 325 | sparams = kmalloc(sizeof(*sparams), GFP_KERNEL); |
| 326 | if (!sw_params || !params || !sparams) { |
| 327 | snd_printd("No memory\n"); |
| 328 | err = -ENOMEM; |
| 329 | goto failure; |
| 330 | } |
| 331 | |
| 332 | if (atomic_read(&runtime->mmap_count)) { |
| 333 | direct = 1; |
| 334 | } else { |
| 335 | snd_pcm_oss_setup_t *setup = substream->oss.setup; |
| 336 | direct = (setup != NULL && setup->direct); |
| 337 | } |
| 338 | |
| 339 | _snd_pcm_hw_params_any(sparams); |
| 340 | _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS); |
| 341 | _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0); |
| 342 | snd_mask_none(&mask); |
| 343 | if (atomic_read(&runtime->mmap_count)) |
| 344 | snd_mask_set(&mask, SNDRV_PCM_ACCESS_MMAP_INTERLEAVED); |
| 345 | else { |
| 346 | snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_INTERLEAVED); |
| 347 | if (!direct) |
| 348 | snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_NONINTERLEAVED); |
| 349 | } |
| 350 | err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask); |
| 351 | if (err < 0) { |
| 352 | snd_printd("No usable accesses\n"); |
| 353 | err = -EINVAL; |
| 354 | goto failure; |
| 355 | } |
| 356 | choose_rate(substream, sparams, runtime->oss.rate); |
| 357 | snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL); |
| 358 | |
| 359 | format = snd_pcm_oss_format_from(runtime->oss.format); |
| 360 | |
| 361 | sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT); |
| 362 | if (direct) |
| 363 | sformat = format; |
| 364 | else |
| 365 | sformat = snd_pcm_plug_slave_format(format, &sformat_mask); |
| 366 | |
| 367 | if (sformat < 0 || !snd_mask_test(&sformat_mask, sformat)) { |
| 368 | for (sformat = 0; sformat <= SNDRV_PCM_FORMAT_LAST; sformat++) { |
| 369 | if (snd_mask_test(&sformat_mask, sformat) && |
| 370 | snd_pcm_oss_format_to(sformat) >= 0) |
| 371 | break; |
| 372 | } |
| 373 | if (sformat > SNDRV_PCM_FORMAT_LAST) { |
| 374 | snd_printd("Cannot find a format!!!\n"); |
| 375 | err = -EINVAL; |
| 376 | goto failure; |
| 377 | } |
| 378 | } |
| 379 | err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, sformat, 0); |
| 380 | snd_assert(err >= 0, goto failure); |
| 381 | |
| 382 | if (direct) { |
| 383 | memcpy(params, sparams, sizeof(*params)); |
| 384 | } else { |
| 385 | _snd_pcm_hw_params_any(params); |
| 386 | _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS, |
| 387 | SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0); |
| 388 | _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT, |
| 389 | snd_pcm_oss_format_from(runtime->oss.format), 0); |
| 390 | _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS, |
| 391 | runtime->oss.channels, 0); |
| 392 | _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE, |
| 393 | runtime->oss.rate, 0); |
| 394 | pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n", |
| 395 | params_access(params), params_format(params), |
| 396 | params_channels(params), params_rate(params)); |
| 397 | } |
| 398 | pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n", |
| 399 | params_access(sparams), params_format(sparams), |
| 400 | params_channels(sparams), params_rate(sparams)); |
| 401 | |
| 402 | oss_frame_size = snd_pcm_format_physical_width(params_format(params)) * |
| 403 | params_channels(params) / 8; |
| 404 | |
| 405 | snd_pcm_oss_plugin_clear(substream); |
| 406 | if (!direct) { |
| 407 | /* add necessary plugins */ |
| 408 | snd_pcm_oss_plugin_clear(substream); |
| 409 | if ((err = snd_pcm_plug_format_plugins(substream, |
| 410 | params, |
| 411 | sparams)) < 0) { |
| 412 | snd_printd("snd_pcm_plug_format_plugins failed: %i\n", err); |
| 413 | snd_pcm_oss_plugin_clear(substream); |
| 414 | goto failure; |
| 415 | } |
| 416 | if (runtime->oss.plugin_first) { |
| 417 | snd_pcm_plugin_t *plugin; |
| 418 | if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) { |
| 419 | snd_printd("snd_pcm_plugin_build_io failed: %i\n", err); |
| 420 | snd_pcm_oss_plugin_clear(substream); |
| 421 | goto failure; |
| 422 | } |
| 423 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| 424 | err = snd_pcm_plugin_append(plugin); |
| 425 | } else { |
| 426 | err = snd_pcm_plugin_insert(plugin); |
| 427 | } |
| 428 | if (err < 0) { |
| 429 | snd_pcm_oss_plugin_clear(substream); |
| 430 | goto failure; |
| 431 | } |
| 432 | } |
| 433 | } |
| 434 | |
| 435 | err = snd_pcm_oss_period_size(substream, params, sparams); |
| 436 | if (err < 0) |
| 437 | goto failure; |
| 438 | |
| 439 | n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size); |
| 440 | err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL); |
| 441 | snd_assert(err >= 0, goto failure); |
| 442 | |
| 443 | err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS, |
| 444 | runtime->oss.periods, NULL); |
| 445 | snd_assert(err >= 0, goto failure); |
| 446 | |
| 447 | snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); |
| 448 | |
| 449 | if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) { |
| 450 | snd_printd("HW_PARAMS failed: %i\n", err); |
| 451 | goto failure; |
| 452 | } |
| 453 | |
| 454 | memset(sw_params, 0, sizeof(*sw_params)); |
| 455 | if (runtime->oss.trigger) { |
| 456 | sw_params->start_threshold = 1; |
| 457 | } else { |
| 458 | sw_params->start_threshold = runtime->boundary; |
| 459 | } |
| 460 | if (atomic_read(&runtime->mmap_count) || substream->stream == SNDRV_PCM_STREAM_CAPTURE) |
| 461 | sw_params->stop_threshold = runtime->boundary; |
| 462 | else |
| 463 | sw_params->stop_threshold = runtime->buffer_size; |
| 464 | sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE; |
| 465 | sw_params->period_step = 1; |
| 466 | sw_params->sleep_min = 0; |
| 467 | sw_params->avail_min = 1; |
| 468 | sw_params->xfer_align = 1; |
| 469 | if (atomic_read(&runtime->mmap_count) || |
| 470 | (substream->oss.setup && substream->oss.setup->nosilence)) { |
| 471 | sw_params->silence_threshold = 0; |
| 472 | sw_params->silence_size = 0; |
| 473 | } else { |
| 474 | snd_pcm_uframes_t frames; |
| 475 | frames = runtime->period_size + 16; |
| 476 | if (frames > runtime->buffer_size) |
| 477 | frames = runtime->buffer_size; |
| 478 | sw_params->silence_threshold = frames; |
| 479 | sw_params->silence_size = frames; |
| 480 | } |
| 481 | |
| 482 | if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) { |
| 483 | snd_printd("SW_PARAMS failed: %i\n", err); |
| 484 | goto failure; |
| 485 | } |
| 486 | |
| 487 | runtime->oss.periods = params_periods(sparams); |
| 488 | oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams)); |
| 489 | snd_assert(oss_period_size >= 0, err = -EINVAL; goto failure); |
| 490 | if (runtime->oss.plugin_first) { |
| 491 | err = snd_pcm_plug_alloc(substream, oss_period_size); |
| 492 | if (err < 0) |
| 493 | goto failure; |
| 494 | } |
| 495 | oss_period_size *= oss_frame_size; |
| 496 | |
| 497 | oss_buffer_size = oss_period_size * runtime->oss.periods; |
| 498 | snd_assert(oss_buffer_size >= 0, err = -EINVAL; goto failure); |
| 499 | |
| 500 | runtime->oss.period_bytes = oss_period_size; |
| 501 | runtime->oss.buffer_bytes = oss_buffer_size; |
| 502 | |
| 503 | pdprintf("oss: period bytes = %i, buffer bytes = %i\n", |
| 504 | runtime->oss.period_bytes, |
| 505 | runtime->oss.buffer_bytes); |
| 506 | pdprintf("slave: period_size = %i, buffer_size = %i\n", |
| 507 | params_period_size(sparams), |
| 508 | params_buffer_size(sparams)); |
| 509 | |
| 510 | runtime->oss.format = snd_pcm_oss_format_to(params_format(params)); |
| 511 | runtime->oss.channels = params_channels(params); |
| 512 | runtime->oss.rate = params_rate(params); |
| 513 | |
| 514 | runtime->oss.params = 0; |
| 515 | runtime->oss.prepare = 1; |
| 516 | vfree(runtime->oss.buffer); |
| 517 | runtime->oss.buffer = vmalloc(runtime->oss.period_bytes); |
| 518 | runtime->oss.buffer_used = 0; |
| 519 | if (runtime->dma_area) |
| 520 | snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes)); |
| 521 | |
| 522 | runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size); |
| 523 | |
| 524 | err = 0; |
| 525 | failure: |
| 526 | kfree(sw_params); |
| 527 | kfree(params); |
| 528 | kfree(sparams); |
| 529 | return err; |
| 530 | } |
| 531 | |
| 532 | static int snd_pcm_oss_get_active_substream(snd_pcm_oss_file_t *pcm_oss_file, snd_pcm_substream_t **r_substream) |
| 533 | { |
| 534 | int idx, err; |
| 535 | snd_pcm_substream_t *asubstream = NULL, *substream; |
| 536 | |
| 537 | for (idx = 0; idx < 2; idx++) { |
| 538 | substream = pcm_oss_file->streams[idx]; |
| 539 | if (substream == NULL) |
| 540 | continue; |
| 541 | if (asubstream == NULL) |
| 542 | asubstream = substream; |
| 543 | if (substream->runtime->oss.params) { |
| 544 | err = snd_pcm_oss_change_params(substream); |
| 545 | if (err < 0) |
| 546 | return err; |
| 547 | } |
| 548 | } |
| 549 | snd_assert(asubstream != NULL, return -EIO); |
| 550 | if (r_substream) |
| 551 | *r_substream = asubstream; |
| 552 | return 0; |
| 553 | } |
| 554 | |
| 555 | static int snd_pcm_oss_prepare(snd_pcm_substream_t *substream) |
| 556 | { |
| 557 | int err; |
| 558 | snd_pcm_runtime_t *runtime = substream->runtime; |
| 559 | |
| 560 | err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL); |
| 561 | if (err < 0) { |
| 562 | snd_printd("snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n"); |
| 563 | return err; |
| 564 | } |
| 565 | runtime->oss.prepare = 0; |
| 566 | runtime->oss.prev_hw_ptr_interrupt = 0; |
| 567 | runtime->oss.period_ptr = 0; |
| 568 | runtime->oss.buffer_used = 0; |
| 569 | |
| 570 | return 0; |
| 571 | } |
| 572 | |
| 573 | static int snd_pcm_oss_make_ready(snd_pcm_substream_t *substream) |
| 574 | { |
| 575 | snd_pcm_runtime_t *runtime; |
| 576 | int err; |
| 577 | |
| 578 | if (substream == NULL) |
| 579 | return 0; |
| 580 | runtime = substream->runtime; |
| 581 | if (runtime->oss.params) { |
| 582 | err = snd_pcm_oss_change_params(substream); |
| 583 | if (err < 0) |
| 584 | return err; |
| 585 | } |
| 586 | if (runtime->oss.prepare) { |
| 587 | err = snd_pcm_oss_prepare(substream); |
| 588 | if (err < 0) |
| 589 | return err; |
| 590 | } |
| 591 | return 0; |
| 592 | } |
| 593 | |
| 594 | static int snd_pcm_oss_capture_position_fixup(snd_pcm_substream_t *substream, snd_pcm_sframes_t *delay) |
| 595 | { |
| 596 | snd_pcm_runtime_t *runtime; |
| 597 | snd_pcm_uframes_t frames; |
| 598 | int err = 0; |
| 599 | |
| 600 | while (1) { |
| 601 | err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay); |
| 602 | if (err < 0) |
| 603 | break; |
| 604 | runtime = substream->runtime; |
| 605 | if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size) |
| 606 | break; |
| 607 | /* in case of overrun, skip whole periods like OSS/Linux driver does */ |
| 608 | /* until avail(delay) <= buffer_size */ |
| 609 | frames = (*delay - runtime->buffer_size) + runtime->period_size - 1; |
| 610 | frames /= runtime->period_size; |
| 611 | frames *= runtime->period_size; |
| 612 | err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames); |
| 613 | if (err < 0) |
| 614 | break; |
| 615 | } |
| 616 | return err; |
| 617 | } |
| 618 | |
| 619 | snd_pcm_sframes_t snd_pcm_oss_write3(snd_pcm_substream_t *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel) |
| 620 | { |
| 621 | snd_pcm_runtime_t *runtime = substream->runtime; |
| 622 | int ret; |
| 623 | while (1) { |
| 624 | if (runtime->status->state == SNDRV_PCM_STATE_XRUN || |
| 625 | runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { |
| 626 | #ifdef OSS_DEBUG |
| 627 | if (runtime->status->state == SNDRV_PCM_STATE_XRUN) |
| 628 | printk("pcm_oss: write: recovering from XRUN\n"); |
| 629 | else |
| 630 | printk("pcm_oss: write: recovering from SUSPEND\n"); |
| 631 | #endif |
| 632 | ret = snd_pcm_oss_prepare(substream); |
| 633 | if (ret < 0) |
| 634 | break; |
| 635 | } |
| 636 | if (in_kernel) { |
| 637 | mm_segment_t fs; |
| 638 | fs = snd_enter_user(); |
| 639 | ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames); |
| 640 | snd_leave_user(fs); |
| 641 | } else { |
| 642 | ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames); |
| 643 | } |
| 644 | if (ret != -EPIPE && ret != -ESTRPIPE) |
| 645 | break; |
| 646 | /* test, if we can't store new data, because the stream */ |
| 647 | /* has not been started */ |
| 648 | if (runtime->status->state == SNDRV_PCM_STATE_PREPARED) |
| 649 | return -EAGAIN; |
| 650 | } |
| 651 | return ret; |
| 652 | } |
| 653 | |
| 654 | snd_pcm_sframes_t snd_pcm_oss_read3(snd_pcm_substream_t *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel) |
| 655 | { |
| 656 | snd_pcm_runtime_t *runtime = substream->runtime; |
| 657 | snd_pcm_sframes_t delay; |
| 658 | int ret; |
| 659 | while (1) { |
| 660 | if (runtime->status->state == SNDRV_PCM_STATE_XRUN || |
| 661 | runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { |
| 662 | #ifdef OSS_DEBUG |
| 663 | if (runtime->status->state == SNDRV_PCM_STATE_XRUN) |
| 664 | printk("pcm_oss: read: recovering from XRUN\n"); |
| 665 | else |
| 666 | printk("pcm_oss: read: recovering from SUSPEND\n"); |
| 667 | #endif |
| 668 | ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); |
| 669 | if (ret < 0) |
| 670 | break; |
| 671 | } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) { |
| 672 | ret = snd_pcm_oss_prepare(substream); |
| 673 | if (ret < 0) |
| 674 | break; |
| 675 | } |
| 676 | ret = snd_pcm_oss_capture_position_fixup(substream, &delay); |
| 677 | if (ret < 0) |
| 678 | break; |
| 679 | if (in_kernel) { |
| 680 | mm_segment_t fs; |
| 681 | fs = snd_enter_user(); |
| 682 | ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames); |
| 683 | snd_leave_user(fs); |
| 684 | } else { |
| 685 | ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames); |
| 686 | } |
| 687 | if (ret == -EPIPE) { |
| 688 | if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) { |
| 689 | ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); |
| 690 | if (ret < 0) |
| 691 | break; |
| 692 | } |
| 693 | continue; |
| 694 | } |
| 695 | if (ret != -ESTRPIPE) |
| 696 | break; |
| 697 | } |
| 698 | return ret; |
| 699 | } |
| 700 | |
| 701 | snd_pcm_sframes_t snd_pcm_oss_writev3(snd_pcm_substream_t *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel) |
| 702 | { |
| 703 | snd_pcm_runtime_t *runtime = substream->runtime; |
| 704 | int ret; |
| 705 | while (1) { |
| 706 | if (runtime->status->state == SNDRV_PCM_STATE_XRUN || |
| 707 | runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { |
| 708 | #ifdef OSS_DEBUG |
| 709 | if (runtime->status->state == SNDRV_PCM_STATE_XRUN) |
| 710 | printk("pcm_oss: writev: recovering from XRUN\n"); |
| 711 | else |
| 712 | printk("pcm_oss: writev: recovering from SUSPEND\n"); |
| 713 | #endif |
| 714 | ret = snd_pcm_oss_prepare(substream); |
| 715 | if (ret < 0) |
| 716 | break; |
| 717 | } |
| 718 | if (in_kernel) { |
| 719 | mm_segment_t fs; |
| 720 | fs = snd_enter_user(); |
| 721 | ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames); |
| 722 | snd_leave_user(fs); |
| 723 | } else { |
| 724 | ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames); |
| 725 | } |
| 726 | if (ret != -EPIPE && ret != -ESTRPIPE) |
| 727 | break; |
| 728 | |
| 729 | /* test, if we can't store new data, because the stream */ |
| 730 | /* has not been started */ |
| 731 | if (runtime->status->state == SNDRV_PCM_STATE_PREPARED) |
| 732 | return -EAGAIN; |
| 733 | } |
| 734 | return ret; |
| 735 | } |
| 736 | |
| 737 | snd_pcm_sframes_t snd_pcm_oss_readv3(snd_pcm_substream_t *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel) |
| 738 | { |
| 739 | snd_pcm_runtime_t *runtime = substream->runtime; |
| 740 | int ret; |
| 741 | while (1) { |
| 742 | if (runtime->status->state == SNDRV_PCM_STATE_XRUN || |
| 743 | runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) { |
| 744 | #ifdef OSS_DEBUG |
| 745 | if (runtime->status->state == SNDRV_PCM_STATE_XRUN) |
| 746 | printk("pcm_oss: readv: recovering from XRUN\n"); |
| 747 | else |
| 748 | printk("pcm_oss: readv: recovering from SUSPEND\n"); |
| 749 | #endif |
| 750 | ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); |
| 751 | if (ret < 0) |
| 752 | break; |
| 753 | } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) { |
| 754 | ret = snd_pcm_oss_prepare(substream); |
| 755 | if (ret < 0) |
| 756 | break; |
| 757 | } |
| 758 | if (in_kernel) { |
| 759 | mm_segment_t fs; |
| 760 | fs = snd_enter_user(); |
| 761 | ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames); |
| 762 | snd_leave_user(fs); |
| 763 | } else { |
| 764 | ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames); |
| 765 | } |
| 766 | if (ret != -EPIPE && ret != -ESTRPIPE) |
| 767 | break; |
| 768 | } |
| 769 | return ret; |
| 770 | } |
| 771 | |
| 772 | static ssize_t snd_pcm_oss_write2(snd_pcm_substream_t *substream, const char *buf, size_t bytes, int in_kernel) |
| 773 | { |
| 774 | snd_pcm_runtime_t *runtime = substream->runtime; |
| 775 | snd_pcm_sframes_t frames, frames1; |
| 776 | if (runtime->oss.plugin_first) { |
| 777 | snd_pcm_plugin_channel_t *channels; |
| 778 | size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8; |
| 779 | if (!in_kernel) { |
| 780 | if (copy_from_user(runtime->oss.buffer, (const char __user *)buf, bytes)) |
| 781 | return -EFAULT; |
| 782 | buf = runtime->oss.buffer; |
| 783 | } |
| 784 | frames = bytes / oss_frame_bytes; |
| 785 | frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels); |
| 786 | if (frames1 < 0) |
| 787 | return frames1; |
| 788 | frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1); |
| 789 | if (frames1 <= 0) |
| 790 | return frames1; |
| 791 | bytes = frames1 * oss_frame_bytes; |
| 792 | } else { |
| 793 | frames = bytes_to_frames(runtime, bytes); |
| 794 | frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel); |
| 795 | if (frames1 <= 0) |
| 796 | return frames1; |
| 797 | bytes = frames_to_bytes(runtime, frames1); |
| 798 | } |
| 799 | return bytes; |
| 800 | } |
| 801 | |
| 802 | static ssize_t snd_pcm_oss_write1(snd_pcm_substream_t *substream, const char __user *buf, size_t bytes) |
| 803 | { |
| 804 | size_t xfer = 0; |
| 805 | ssize_t tmp; |
| 806 | snd_pcm_runtime_t *runtime = substream->runtime; |
| 807 | |
| 808 | if (atomic_read(&runtime->mmap_count)) |
| 809 | return -ENXIO; |
| 810 | |
| 811 | if ((tmp = snd_pcm_oss_make_ready(substream)) < 0) |
| 812 | return tmp; |
| 813 | while (bytes > 0) { |
| 814 | if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) { |
| 815 | tmp = bytes; |
| 816 | if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes) |
| 817 | tmp = runtime->oss.period_bytes - runtime->oss.buffer_used; |
| 818 | if (tmp > 0) { |
| 819 | if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp)) |
| 820 | return xfer > 0 ? (snd_pcm_sframes_t)xfer : -EFAULT; |
| 821 | } |
| 822 | runtime->oss.buffer_used += tmp; |
| 823 | buf += tmp; |
| 824 | bytes -= tmp; |
| 825 | xfer += tmp; |
| 826 | if ((substream->oss.setup != NULL && substream->oss.setup->partialfrag) || |
| 827 | runtime->oss.buffer_used == runtime->oss.period_bytes) { |
| 828 | tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr, |
| 829 | runtime->oss.buffer_used - runtime->oss.period_ptr, 1); |
| 830 | if (tmp <= 0) |
| 831 | return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; |
| 832 | runtime->oss.bytes += tmp; |
| 833 | runtime->oss.period_ptr += tmp; |
| 834 | runtime->oss.period_ptr %= runtime->oss.period_bytes; |
| 835 | if (runtime->oss.period_ptr == 0 || |
| 836 | runtime->oss.period_ptr == runtime->oss.buffer_used) |
| 837 | runtime->oss.buffer_used = 0; |
| 838 | else if ((substream->ffile->f_flags & O_NONBLOCK) != 0) |
| 839 | return xfer > 0 ? xfer : -EAGAIN; |
| 840 | } |
| 841 | } else { |
| 842 | tmp = snd_pcm_oss_write2(substream, (const char *)buf, runtime->oss.period_bytes, 0); |
| 843 | if (tmp <= 0) |
| 844 | return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; |
| 845 | runtime->oss.bytes += tmp; |
| 846 | buf += tmp; |
| 847 | bytes -= tmp; |
| 848 | xfer += tmp; |
| 849 | if ((substream->ffile->f_flags & O_NONBLOCK) != 0 && |
| 850 | tmp != runtime->oss.period_bytes) |
| 851 | break; |
| 852 | } |
| 853 | } |
| 854 | return xfer; |
| 855 | } |
| 856 | |
| 857 | static ssize_t snd_pcm_oss_read2(snd_pcm_substream_t *substream, char *buf, size_t bytes, int in_kernel) |
| 858 | { |
| 859 | snd_pcm_runtime_t *runtime = substream->runtime; |
| 860 | snd_pcm_sframes_t frames, frames1; |
| 861 | char __user *final_dst = (char __user *)buf; |
| 862 | if (runtime->oss.plugin_first) { |
| 863 | snd_pcm_plugin_channel_t *channels; |
| 864 | size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8; |
| 865 | if (!in_kernel) |
| 866 | buf = runtime->oss.buffer; |
| 867 | frames = bytes / oss_frame_bytes; |
| 868 | frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels); |
| 869 | if (frames1 < 0) |
| 870 | return frames1; |
| 871 | frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1); |
| 872 | if (frames1 <= 0) |
| 873 | return frames1; |
| 874 | bytes = frames1 * oss_frame_bytes; |
| 875 | if (!in_kernel && copy_to_user(final_dst, buf, bytes)) |
| 876 | return -EFAULT; |
| 877 | } else { |
| 878 | frames = bytes_to_frames(runtime, bytes); |
| 879 | frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel); |
| 880 | if (frames1 <= 0) |
| 881 | return frames1; |
| 882 | bytes = frames_to_bytes(runtime, frames1); |
| 883 | } |
| 884 | return bytes; |
| 885 | } |
| 886 | |
| 887 | static ssize_t snd_pcm_oss_read1(snd_pcm_substream_t *substream, char __user *buf, size_t bytes) |
| 888 | { |
| 889 | size_t xfer = 0; |
| 890 | ssize_t tmp; |
| 891 | snd_pcm_runtime_t *runtime = substream->runtime; |
| 892 | |
| 893 | if (atomic_read(&runtime->mmap_count)) |
| 894 | return -ENXIO; |
| 895 | |
| 896 | if ((tmp = snd_pcm_oss_make_ready(substream)) < 0) |
| 897 | return tmp; |
| 898 | while (bytes > 0) { |
| 899 | if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) { |
| 900 | if (runtime->oss.buffer_used == 0) { |
| 901 | tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1); |
| 902 | if (tmp <= 0) |
| 903 | return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; |
| 904 | runtime->oss.bytes += tmp; |
| 905 | runtime->oss.period_ptr = tmp; |
| 906 | runtime->oss.buffer_used = tmp; |
| 907 | } |
| 908 | tmp = bytes; |
| 909 | if ((size_t) tmp > runtime->oss.buffer_used) |
| 910 | tmp = runtime->oss.buffer_used; |
| 911 | if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp)) |
| 912 | return xfer > 0 ? (snd_pcm_sframes_t)xfer : -EFAULT; |
| 913 | buf += tmp; |
| 914 | bytes -= tmp; |
| 915 | xfer += tmp; |
| 916 | runtime->oss.buffer_used -= tmp; |
| 917 | } else { |
| 918 | tmp = snd_pcm_oss_read2(substream, (char *)buf, runtime->oss.period_bytes, 0); |
| 919 | if (tmp <= 0) |
| 920 | return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp; |
| 921 | runtime->oss.bytes += tmp; |
| 922 | buf += tmp; |
| 923 | bytes -= tmp; |
| 924 | xfer += tmp; |
| 925 | } |
| 926 | } |
| 927 | return xfer; |
| 928 | } |
| 929 | |
| 930 | static int snd_pcm_oss_reset(snd_pcm_oss_file_t *pcm_oss_file) |
| 931 | { |
| 932 | snd_pcm_substream_t *substream; |
| 933 | |
| 934 | substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; |
| 935 | if (substream != NULL) { |
| 936 | snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); |
| 937 | substream->runtime->oss.prepare = 1; |
| 938 | } |
| 939 | substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; |
| 940 | if (substream != NULL) { |
| 941 | snd_pcm_kernel_capture_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); |
| 942 | substream->runtime->oss.prepare = 1; |
| 943 | } |
| 944 | return 0; |
| 945 | } |
| 946 | |
| 947 | static int snd_pcm_oss_post(snd_pcm_oss_file_t *pcm_oss_file) |
| 948 | { |
| 949 | snd_pcm_substream_t *substream; |
| 950 | int err; |
| 951 | |
| 952 | substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; |
| 953 | if (substream != NULL) { |
| 954 | if ((err = snd_pcm_oss_make_ready(substream)) < 0) |
| 955 | return err; |
| 956 | snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL); |
| 957 | } |
| 958 | /* note: all errors from the start action are ignored */ |
| 959 | /* OSS apps do not know, how to handle them */ |
| 960 | return 0; |
| 961 | } |
| 962 | |
| 963 | static int snd_pcm_oss_sync1(snd_pcm_substream_t *substream, size_t size) |
| 964 | { |
| 965 | snd_pcm_runtime_t *runtime; |
| 966 | ssize_t result = 0; |
| 967 | long res; |
| 968 | wait_queue_t wait; |
| 969 | |
| 970 | runtime = substream->runtime; |
| 971 | init_waitqueue_entry(&wait, current); |
| 972 | add_wait_queue(&runtime->sleep, &wait); |
| 973 | #ifdef OSS_DEBUG |
| 974 | printk("sync1: size = %li\n", size); |
| 975 | #endif |
| 976 | while (1) { |
| 977 | result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1); |
| 978 | if (result > 0) { |
| 979 | runtime->oss.buffer_used = 0; |
| 980 | result = 0; |
| 981 | break; |
| 982 | } |
| 983 | if (result != 0 && result != -EAGAIN) |
| 984 | break; |
| 985 | result = 0; |
| 986 | set_current_state(TASK_INTERRUPTIBLE); |
| 987 | snd_pcm_stream_lock_irq(substream); |
| 988 | res = runtime->status->state; |
| 989 | snd_pcm_stream_unlock_irq(substream); |
| 990 | if (res != SNDRV_PCM_STATE_RUNNING) { |
| 991 | set_current_state(TASK_RUNNING); |
| 992 | break; |
| 993 | } |
| 994 | res = schedule_timeout(10 * HZ); |
| 995 | if (signal_pending(current)) { |
| 996 | result = -ERESTARTSYS; |
| 997 | break; |
| 998 | } |
| 999 | if (res == 0) { |
| 1000 | snd_printk(KERN_ERR "OSS sync error - DMA timeout\n"); |
| 1001 | result = -EIO; |
| 1002 | break; |
| 1003 | } |
| 1004 | } |
| 1005 | remove_wait_queue(&runtime->sleep, &wait); |
| 1006 | return result; |
| 1007 | } |
| 1008 | |
| 1009 | static int snd_pcm_oss_sync(snd_pcm_oss_file_t *pcm_oss_file) |
| 1010 | { |
| 1011 | int err = 0; |
| 1012 | unsigned int saved_f_flags; |
| 1013 | snd_pcm_substream_t *substream; |
| 1014 | snd_pcm_runtime_t *runtime; |
| 1015 | snd_pcm_format_t format; |
| 1016 | unsigned long width; |
| 1017 | size_t size; |
| 1018 | |
| 1019 | substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; |
| 1020 | if (substream != NULL) { |
| 1021 | runtime = substream->runtime; |
| 1022 | if (atomic_read(&runtime->mmap_count)) |
| 1023 | goto __direct; |
| 1024 | if ((err = snd_pcm_oss_make_ready(substream)) < 0) |
| 1025 | return err; |
| 1026 | format = snd_pcm_oss_format_from(runtime->oss.format); |
| 1027 | width = snd_pcm_format_physical_width(format); |
| 1028 | if (runtime->oss.buffer_used > 0) { |
| 1029 | #ifdef OSS_DEBUG |
| 1030 | printk("sync: buffer_used\n"); |
| 1031 | #endif |
| 1032 | size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width; |
| 1033 | snd_pcm_format_set_silence(format, |
| 1034 | runtime->oss.buffer + runtime->oss.buffer_used, |
| 1035 | size); |
| 1036 | err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes); |
| 1037 | if (err < 0) |
| 1038 | return err; |
| 1039 | } else if (runtime->oss.period_ptr > 0) { |
| 1040 | #ifdef OSS_DEBUG |
| 1041 | printk("sync: period_ptr\n"); |
| 1042 | #endif |
| 1043 | size = runtime->oss.period_bytes - runtime->oss.period_ptr; |
| 1044 | snd_pcm_format_set_silence(format, |
| 1045 | runtime->oss.buffer, |
| 1046 | size * 8 / width); |
| 1047 | err = snd_pcm_oss_sync1(substream, size); |
| 1048 | if (err < 0) |
| 1049 | return err; |
| 1050 | } |
| 1051 | /* |
| 1052 | * The ALSA's period might be a bit large than OSS one. |
| 1053 | * Fill the remain portion of ALSA period with zeros. |
| 1054 | */ |
| 1055 | size = runtime->control->appl_ptr % runtime->period_size; |
| 1056 | if (size > 0) { |
| 1057 | size = runtime->period_size - size; |
| 1058 | if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) { |
| 1059 | size = (runtime->frame_bits * size) / 8; |
| 1060 | while (size > 0) { |
| 1061 | mm_segment_t fs; |
| 1062 | size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes; |
| 1063 | size -= size1; |
| 1064 | size1 *= 8; |
| 1065 | size1 /= runtime->sample_bits; |
| 1066 | snd_pcm_format_set_silence(runtime->format, |
| 1067 | runtime->oss.buffer, |
| 1068 | size1); |
| 1069 | fs = snd_enter_user(); |
| 1070 | snd_pcm_lib_write(substream, (void __user *)runtime->oss.buffer, size1); |
| 1071 | snd_leave_user(fs); |
| 1072 | } |
| 1073 | } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) { |
| 1074 | void __user *buffers[runtime->channels]; |
| 1075 | memset(buffers, 0, runtime->channels * sizeof(void *)); |
| 1076 | snd_pcm_lib_writev(substream, buffers, size); |
| 1077 | } |
| 1078 | } |
| 1079 | /* |
| 1080 | * finish sync: drain the buffer |
| 1081 | */ |
| 1082 | __direct: |
| 1083 | saved_f_flags = substream->ffile->f_flags; |
| 1084 | substream->ffile->f_flags &= ~O_NONBLOCK; |
| 1085 | err = snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL); |
| 1086 | substream->ffile->f_flags = saved_f_flags; |
| 1087 | if (err < 0) |
| 1088 | return err; |
| 1089 | runtime->oss.prepare = 1; |
| 1090 | } |
| 1091 | |
| 1092 | substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; |
| 1093 | if (substream != NULL) { |
| 1094 | if ((err = snd_pcm_oss_make_ready(substream)) < 0) |
| 1095 | return err; |
| 1096 | runtime = substream->runtime; |
| 1097 | err = snd_pcm_kernel_capture_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL); |
| 1098 | if (err < 0) |
| 1099 | return err; |
| 1100 | runtime->oss.buffer_used = 0; |
| 1101 | runtime->oss.prepare = 1; |
| 1102 | } |
| 1103 | return 0; |
| 1104 | } |
| 1105 | |
| 1106 | static int snd_pcm_oss_set_rate(snd_pcm_oss_file_t *pcm_oss_file, int rate) |
| 1107 | { |
| 1108 | int idx; |
| 1109 | |
| 1110 | for (idx = 1; idx >= 0; --idx) { |
| 1111 | snd_pcm_substream_t *substream = pcm_oss_file->streams[idx]; |
| 1112 | snd_pcm_runtime_t *runtime; |
| 1113 | if (substream == NULL) |
| 1114 | continue; |
| 1115 | runtime = substream->runtime; |
| 1116 | if (rate < 1000) |
| 1117 | rate = 1000; |
| 1118 | else if (rate > 192000) |
| 1119 | rate = 192000; |
| 1120 | if (runtime->oss.rate != rate) { |
| 1121 | runtime->oss.params = 1; |
| 1122 | runtime->oss.rate = rate; |
| 1123 | } |
| 1124 | } |
| 1125 | return snd_pcm_oss_get_rate(pcm_oss_file); |
| 1126 | } |
| 1127 | |
| 1128 | static int snd_pcm_oss_get_rate(snd_pcm_oss_file_t *pcm_oss_file) |
| 1129 | { |
| 1130 | snd_pcm_substream_t *substream; |
| 1131 | int err; |
| 1132 | |
| 1133 | if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) |
| 1134 | return err; |
| 1135 | return substream->runtime->oss.rate; |
| 1136 | } |
| 1137 | |
| 1138 | static int snd_pcm_oss_set_channels(snd_pcm_oss_file_t *pcm_oss_file, unsigned int channels) |
| 1139 | { |
| 1140 | int idx; |
| 1141 | if (channels < 1) |
| 1142 | channels = 1; |
| 1143 | if (channels > 128) |
| 1144 | return -EINVAL; |
| 1145 | for (idx = 1; idx >= 0; --idx) { |
| 1146 | snd_pcm_substream_t *substream = pcm_oss_file->streams[idx]; |
| 1147 | snd_pcm_runtime_t *runtime; |
| 1148 | if (substream == NULL) |
| 1149 | continue; |
| 1150 | runtime = substream->runtime; |
| 1151 | if (runtime->oss.channels != channels) { |
| 1152 | runtime->oss.params = 1; |
| 1153 | runtime->oss.channels = channels; |
| 1154 | } |
| 1155 | } |
| 1156 | return snd_pcm_oss_get_channels(pcm_oss_file); |
| 1157 | } |
| 1158 | |
| 1159 | static int snd_pcm_oss_get_channels(snd_pcm_oss_file_t *pcm_oss_file) |
| 1160 | { |
| 1161 | snd_pcm_substream_t *substream; |
| 1162 | int err; |
| 1163 | |
| 1164 | if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) |
| 1165 | return err; |
| 1166 | return substream->runtime->oss.channels; |
| 1167 | } |
| 1168 | |
| 1169 | static int snd_pcm_oss_get_block_size(snd_pcm_oss_file_t *pcm_oss_file) |
| 1170 | { |
| 1171 | snd_pcm_substream_t *substream; |
| 1172 | int err; |
| 1173 | |
| 1174 | if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) |
| 1175 | return err; |
| 1176 | return substream->runtime->oss.period_bytes; |
| 1177 | } |
| 1178 | |
| 1179 | static int snd_pcm_oss_get_formats(snd_pcm_oss_file_t *pcm_oss_file) |
| 1180 | { |
| 1181 | snd_pcm_substream_t *substream; |
| 1182 | int err; |
| 1183 | int direct; |
| 1184 | snd_pcm_hw_params_t *params; |
| 1185 | unsigned int formats = 0; |
| 1186 | snd_mask_t format_mask; |
| 1187 | int fmt; |
| 1188 | |
| 1189 | if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) |
| 1190 | return err; |
| 1191 | if (atomic_read(&substream->runtime->mmap_count)) { |
| 1192 | direct = 1; |
| 1193 | } else { |
| 1194 | snd_pcm_oss_setup_t *setup = substream->oss.setup; |
| 1195 | direct = (setup != NULL && setup->direct); |
| 1196 | } |
| 1197 | if (!direct) |
| 1198 | return AFMT_MU_LAW | AFMT_U8 | |
| 1199 | AFMT_S16_LE | AFMT_S16_BE | |
| 1200 | AFMT_S8 | AFMT_U16_LE | |
| 1201 | AFMT_U16_BE; |
| 1202 | params = kmalloc(sizeof(*params), GFP_KERNEL); |
| 1203 | if (!params) |
| 1204 | return -ENOMEM; |
| 1205 | _snd_pcm_hw_params_any(params); |
| 1206 | err = snd_pcm_hw_refine(substream, params); |
| 1207 | format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT); |
| 1208 | kfree(params); |
| 1209 | snd_assert(err >= 0, return err); |
| 1210 | for (fmt = 0; fmt < 32; ++fmt) { |
| 1211 | if (snd_mask_test(&format_mask, fmt)) { |
| 1212 | int f = snd_pcm_oss_format_to(fmt); |
| 1213 | if (f >= 0) |
| 1214 | formats |= f; |
| 1215 | } |
| 1216 | } |
| 1217 | return formats; |
| 1218 | } |
| 1219 | |
| 1220 | static int snd_pcm_oss_set_format(snd_pcm_oss_file_t *pcm_oss_file, int format) |
| 1221 | { |
| 1222 | int formats, idx; |
| 1223 | |
| 1224 | if (format != AFMT_QUERY) { |
| 1225 | formats = snd_pcm_oss_get_formats(pcm_oss_file); |
| 1226 | if (!(formats & format)) |
| 1227 | format = AFMT_U8; |
| 1228 | for (idx = 1; idx >= 0; --idx) { |
| 1229 | snd_pcm_substream_t *substream = pcm_oss_file->streams[idx]; |
| 1230 | snd_pcm_runtime_t *runtime; |
| 1231 | if (substream == NULL) |
| 1232 | continue; |
| 1233 | runtime = substream->runtime; |
| 1234 | if (runtime->oss.format != format) { |
| 1235 | runtime->oss.params = 1; |
| 1236 | runtime->oss.format = format; |
| 1237 | } |
| 1238 | } |
| 1239 | } |
| 1240 | return snd_pcm_oss_get_format(pcm_oss_file); |
| 1241 | } |
| 1242 | |
| 1243 | static int snd_pcm_oss_get_format(snd_pcm_oss_file_t *pcm_oss_file) |
| 1244 | { |
| 1245 | snd_pcm_substream_t *substream; |
| 1246 | int err; |
| 1247 | |
| 1248 | if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0) |
| 1249 | return err; |
| 1250 | return substream->runtime->oss.format; |
| 1251 | } |
| 1252 | |
| 1253 | static int snd_pcm_oss_set_subdivide1(snd_pcm_substream_t *substream, int subdivide) |
| 1254 | { |
| 1255 | snd_pcm_runtime_t *runtime; |
| 1256 | |
| 1257 | if (substream == NULL) |
| 1258 | return 0; |
| 1259 | runtime = substream->runtime; |
| 1260 | if (subdivide == 0) { |
| 1261 | subdivide = runtime->oss.subdivision; |
| 1262 | if (subdivide == 0) |
| 1263 | subdivide = 1; |
| 1264 | return subdivide; |
| 1265 | } |
| 1266 | if (runtime->oss.subdivision || runtime->oss.fragshift) |
| 1267 | return -EINVAL; |
| 1268 | if (subdivide != 1 && subdivide != 2 && subdivide != 4 && |
| 1269 | subdivide != 8 && subdivide != 16) |
| 1270 | return -EINVAL; |
| 1271 | runtime->oss.subdivision = subdivide; |
| 1272 | runtime->oss.params = 1; |
| 1273 | return subdivide; |
| 1274 | } |
| 1275 | |
| 1276 | static int snd_pcm_oss_set_subdivide(snd_pcm_oss_file_t *pcm_oss_file, int subdivide) |
| 1277 | { |
| 1278 | int err = -EINVAL, idx; |
| 1279 | |
| 1280 | for (idx = 1; idx >= 0; --idx) { |
| 1281 | snd_pcm_substream_t *substream = pcm_oss_file->streams[idx]; |
| 1282 | if (substream == NULL) |
| 1283 | continue; |
| 1284 | if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0) |
| 1285 | return err; |
| 1286 | } |
| 1287 | return err; |
| 1288 | } |
| 1289 | |
| 1290 | static int snd_pcm_oss_set_fragment1(snd_pcm_substream_t *substream, unsigned int val) |
| 1291 | { |
| 1292 | snd_pcm_runtime_t *runtime; |
| 1293 | |
| 1294 | if (substream == NULL) |
| 1295 | return 0; |
| 1296 | runtime = substream->runtime; |
| 1297 | if (runtime->oss.subdivision || runtime->oss.fragshift) |
| 1298 | return -EINVAL; |
| 1299 | runtime->oss.fragshift = val & 0xffff; |
| 1300 | runtime->oss.maxfrags = (val >> 16) & 0xffff; |
| 1301 | if (runtime->oss.fragshift < 4) /* < 16 */ |
| 1302 | runtime->oss.fragshift = 4; |
| 1303 | if (runtime->oss.maxfrags < 2) |
| 1304 | runtime->oss.maxfrags = 2; |
| 1305 | runtime->oss.params = 1; |
| 1306 | return 0; |
| 1307 | } |
| 1308 | |
| 1309 | static int snd_pcm_oss_set_fragment(snd_pcm_oss_file_t *pcm_oss_file, unsigned int val) |
| 1310 | { |
| 1311 | int err = -EINVAL, idx; |
| 1312 | |
| 1313 | for (idx = 1; idx >= 0; --idx) { |
| 1314 | snd_pcm_substream_t *substream = pcm_oss_file->streams[idx]; |
| 1315 | if (substream == NULL) |
| 1316 | continue; |
| 1317 | if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0) |
| 1318 | return err; |
| 1319 | } |
| 1320 | return err; |
| 1321 | } |
| 1322 | |
| 1323 | static int snd_pcm_oss_nonblock(struct file * file) |
| 1324 | { |
| 1325 | file->f_flags |= O_NONBLOCK; |
| 1326 | return 0; |
| 1327 | } |
| 1328 | |
| 1329 | static int snd_pcm_oss_get_caps1(snd_pcm_substream_t *substream, int res) |
| 1330 | { |
| 1331 | |
| 1332 | if (substream == NULL) { |
| 1333 | res &= ~DSP_CAP_DUPLEX; |
| 1334 | return res; |
| 1335 | } |
| 1336 | #ifdef DSP_CAP_MULTI |
| 1337 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
| 1338 | if (substream->pstr->substream_count > 1) |
| 1339 | res |= DSP_CAP_MULTI; |
| 1340 | #endif |
| 1341 | /* DSP_CAP_REALTIME is set all times: */ |
| 1342 | /* all ALSA drivers can return actual pointer in ring buffer */ |
| 1343 | #if defined(DSP_CAP_REALTIME) && 0 |
| 1344 | { |
| 1345 | snd_pcm_runtime_t *runtime = substream->runtime; |
| 1346 | if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH)) |
| 1347 | res &= ~DSP_CAP_REALTIME; |
| 1348 | } |
| 1349 | #endif |
| 1350 | return res; |
| 1351 | } |
| 1352 | |
| 1353 | static int snd_pcm_oss_get_caps(snd_pcm_oss_file_t *pcm_oss_file) |
| 1354 | { |
| 1355 | int result, idx; |
| 1356 | |
| 1357 | result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME; |
| 1358 | for (idx = 0; idx < 2; idx++) { |
| 1359 | snd_pcm_substream_t *substream = pcm_oss_file->streams[idx]; |
| 1360 | result = snd_pcm_oss_get_caps1(substream, result); |
| 1361 | } |
| 1362 | result |= 0x0001; /* revision - same as SB AWE 64 */ |
| 1363 | return result; |
| 1364 | } |
| 1365 | |
| 1366 | static void snd_pcm_oss_simulate_fill(snd_pcm_substream_t *substream, snd_pcm_uframes_t hw_ptr) |
| 1367 | { |
| 1368 | snd_pcm_runtime_t *runtime = substream->runtime; |
| 1369 | snd_pcm_uframes_t appl_ptr; |
| 1370 | appl_ptr = hw_ptr + runtime->buffer_size; |
| 1371 | appl_ptr %= runtime->boundary; |
| 1372 | runtime->control->appl_ptr = appl_ptr; |
| 1373 | } |
| 1374 | |
| 1375 | static int snd_pcm_oss_set_trigger(snd_pcm_oss_file_t *pcm_oss_file, int trigger) |
| 1376 | { |
| 1377 | snd_pcm_runtime_t *runtime; |
| 1378 | snd_pcm_substream_t *psubstream = NULL, *csubstream = NULL; |
| 1379 | int err, cmd; |
| 1380 | |
| 1381 | #ifdef OSS_DEBUG |
| 1382 | printk("pcm_oss: trigger = 0x%x\n", trigger); |
| 1383 | #endif |
| 1384 | |
| 1385 | psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; |
| 1386 | csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; |
| 1387 | |
| 1388 | if (psubstream) { |
| 1389 | if ((err = snd_pcm_oss_make_ready(psubstream)) < 0) |
| 1390 | return err; |
| 1391 | } |
| 1392 | if (csubstream) { |
| 1393 | if ((err = snd_pcm_oss_make_ready(csubstream)) < 0) |
| 1394 | return err; |
| 1395 | } |
| 1396 | if (psubstream) { |
| 1397 | runtime = psubstream->runtime; |
| 1398 | if (trigger & PCM_ENABLE_OUTPUT) { |
| 1399 | if (runtime->oss.trigger) |
| 1400 | goto _skip1; |
| 1401 | if (atomic_read(&psubstream->runtime->mmap_count)) |
| 1402 | snd_pcm_oss_simulate_fill(psubstream, runtime->hw_ptr_interrupt); |
| 1403 | runtime->oss.trigger = 1; |
| 1404 | runtime->start_threshold = 1; |
| 1405 | cmd = SNDRV_PCM_IOCTL_START; |
| 1406 | } else { |
| 1407 | if (!runtime->oss.trigger) |
| 1408 | goto _skip1; |
| 1409 | runtime->oss.trigger = 0; |
| 1410 | runtime->start_threshold = runtime->boundary; |
| 1411 | cmd = SNDRV_PCM_IOCTL_DROP; |
| 1412 | runtime->oss.prepare = 1; |
| 1413 | } |
| 1414 | err = snd_pcm_kernel_playback_ioctl(psubstream, cmd, NULL); |
| 1415 | if (err < 0) |
| 1416 | return err; |
| 1417 | } |
| 1418 | _skip1: |
| 1419 | if (csubstream) { |
| 1420 | runtime = csubstream->runtime; |
| 1421 | if (trigger & PCM_ENABLE_INPUT) { |
| 1422 | if (runtime->oss.trigger) |
| 1423 | goto _skip2; |
| 1424 | runtime->oss.trigger = 1; |
| 1425 | runtime->start_threshold = 1; |
| 1426 | cmd = SNDRV_PCM_IOCTL_START; |
| 1427 | } else { |
| 1428 | if (!runtime->oss.trigger) |
| 1429 | goto _skip2; |
| 1430 | runtime->oss.trigger = 0; |
| 1431 | runtime->start_threshold = runtime->boundary; |
| 1432 | cmd = SNDRV_PCM_IOCTL_DROP; |
| 1433 | runtime->oss.prepare = 1; |
| 1434 | } |
| 1435 | err = snd_pcm_kernel_capture_ioctl(csubstream, cmd, NULL); |
| 1436 | if (err < 0) |
| 1437 | return err; |
| 1438 | } |
| 1439 | _skip2: |
| 1440 | return 0; |
| 1441 | } |
| 1442 | |
| 1443 | static int snd_pcm_oss_get_trigger(snd_pcm_oss_file_t *pcm_oss_file) |
| 1444 | { |
| 1445 | snd_pcm_substream_t *psubstream = NULL, *csubstream = NULL; |
| 1446 | int result = 0; |
| 1447 | |
| 1448 | psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; |
| 1449 | csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; |
| 1450 | if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger) |
| 1451 | result |= PCM_ENABLE_OUTPUT; |
| 1452 | if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger) |
| 1453 | result |= PCM_ENABLE_INPUT; |
| 1454 | return result; |
| 1455 | } |
| 1456 | |
| 1457 | static int snd_pcm_oss_get_odelay(snd_pcm_oss_file_t *pcm_oss_file) |
| 1458 | { |
| 1459 | snd_pcm_substream_t *substream; |
| 1460 | snd_pcm_runtime_t *runtime; |
| 1461 | snd_pcm_sframes_t delay; |
| 1462 | int err; |
| 1463 | |
| 1464 | substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; |
| 1465 | if (substream == NULL) |
| 1466 | return -EINVAL; |
| 1467 | if ((err = snd_pcm_oss_make_ready(substream)) < 0) |
| 1468 | return err; |
| 1469 | runtime = substream->runtime; |
| 1470 | if (runtime->oss.params || runtime->oss.prepare) |
| 1471 | return 0; |
| 1472 | err = snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay); |
| 1473 | if (err == -EPIPE) |
| 1474 | delay = 0; /* hack for broken OSS applications */ |
| 1475 | else if (err < 0) |
| 1476 | return err; |
| 1477 | return snd_pcm_oss_bytes(substream, delay); |
| 1478 | } |
| 1479 | |
| 1480 | static int snd_pcm_oss_get_ptr(snd_pcm_oss_file_t *pcm_oss_file, int stream, struct count_info __user * _info) |
| 1481 | { |
| 1482 | snd_pcm_substream_t *substream; |
| 1483 | snd_pcm_runtime_t *runtime; |
| 1484 | snd_pcm_sframes_t delay; |
| 1485 | int fixup; |
| 1486 | struct count_info info; |
| 1487 | int err; |
| 1488 | |
| 1489 | if (_info == NULL) |
| 1490 | return -EFAULT; |
| 1491 | substream = pcm_oss_file->streams[stream]; |
| 1492 | if (substream == NULL) |
| 1493 | return -EINVAL; |
| 1494 | if ((err = snd_pcm_oss_make_ready(substream)) < 0) |
| 1495 | return err; |
| 1496 | runtime = substream->runtime; |
| 1497 | if (runtime->oss.params || runtime->oss.prepare) { |
| 1498 | memset(&info, 0, sizeof(info)); |
| 1499 | if (copy_to_user(_info, &info, sizeof(info))) |
| 1500 | return -EFAULT; |
| 1501 | return 0; |
| 1502 | } |
| 1503 | if (stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| 1504 | err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay); |
| 1505 | if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) { |
| 1506 | err = 0; |
| 1507 | delay = 0; |
| 1508 | fixup = 0; |
| 1509 | } else { |
| 1510 | fixup = runtime->oss.buffer_used; |
| 1511 | } |
| 1512 | } else { |
| 1513 | err = snd_pcm_oss_capture_position_fixup(substream, &delay); |
| 1514 | fixup = -runtime->oss.buffer_used; |
| 1515 | } |
| 1516 | if (err < 0) |
| 1517 | return err; |
| 1518 | info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size); |
| 1519 | if (atomic_read(&runtime->mmap_count)) { |
| 1520 | snd_pcm_sframes_t n; |
| 1521 | n = (delay = runtime->hw_ptr_interrupt) - runtime->oss.prev_hw_ptr_interrupt; |
| 1522 | if (n < 0) |
| 1523 | n += runtime->boundary; |
| 1524 | info.blocks = n / runtime->period_size; |
| 1525 | runtime->oss.prev_hw_ptr_interrupt = delay; |
| 1526 | if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) |
| 1527 | snd_pcm_oss_simulate_fill(substream, delay); |
| 1528 | info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX; |
| 1529 | } else { |
| 1530 | delay = snd_pcm_oss_bytes(substream, delay) + fixup; |
| 1531 | info.blocks = delay / runtime->oss.period_bytes; |
| 1532 | if (stream == SNDRV_PCM_STREAM_PLAYBACK) |
| 1533 | info.bytes = (runtime->oss.bytes - delay) & INT_MAX; |
| 1534 | else |
| 1535 | info.bytes = (runtime->oss.bytes + delay) & INT_MAX; |
| 1536 | } |
| 1537 | if (copy_to_user(_info, &info, sizeof(info))) |
| 1538 | return -EFAULT; |
| 1539 | return 0; |
| 1540 | } |
| 1541 | |
| 1542 | static int snd_pcm_oss_get_space(snd_pcm_oss_file_t *pcm_oss_file, int stream, struct audio_buf_info __user *_info) |
| 1543 | { |
| 1544 | snd_pcm_substream_t *substream; |
| 1545 | snd_pcm_runtime_t *runtime; |
| 1546 | snd_pcm_sframes_t avail; |
| 1547 | int fixup; |
| 1548 | struct audio_buf_info info; |
| 1549 | int err; |
| 1550 | |
| 1551 | if (_info == NULL) |
| 1552 | return -EFAULT; |
| 1553 | substream = pcm_oss_file->streams[stream]; |
| 1554 | if (substream == NULL) |
| 1555 | return -EINVAL; |
| 1556 | runtime = substream->runtime; |
| 1557 | |
| 1558 | if (runtime->oss.params && |
| 1559 | (err = snd_pcm_oss_change_params(substream)) < 0) |
| 1560 | return err; |
| 1561 | |
| 1562 | info.fragsize = runtime->oss.period_bytes; |
| 1563 | info.fragstotal = runtime->periods; |
| 1564 | if (runtime->oss.prepare) { |
| 1565 | if (stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| 1566 | info.bytes = runtime->oss.period_bytes * runtime->oss.periods; |
| 1567 | info.fragments = runtime->oss.periods; |
| 1568 | } else { |
| 1569 | info.bytes = 0; |
| 1570 | info.fragments = 0; |
| 1571 | } |
| 1572 | } else { |
| 1573 | if (stream == SNDRV_PCM_STREAM_PLAYBACK) { |
| 1574 | err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail); |
| 1575 | if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) { |
| 1576 | avail = runtime->buffer_size; |
| 1577 | err = 0; |
| 1578 | fixup = 0; |
| 1579 | } else { |
| 1580 | avail = runtime->buffer_size - avail; |
| 1581 | fixup = -runtime->oss.buffer_used; |
| 1582 | } |
| 1583 | } else { |
| 1584 | err = snd_pcm_oss_capture_position_fixup(substream, &avail); |
| 1585 | fixup = runtime->oss.buffer_used; |
| 1586 | } |
| 1587 | if (err < 0) |
| 1588 | return err; |
| 1589 | info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup; |
| 1590 | info.fragments = info.bytes / runtime->oss.period_bytes; |
| 1591 | } |
| 1592 | |
| 1593 | #ifdef OSS_DEBUG |
| 1594 | printk("pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n", info.bytes, info.fragments, info.fragstotal, info.fragsize); |
| 1595 | #endif |
| 1596 | if (copy_to_user(_info, &info, sizeof(info))) |
| 1597 | return -EFAULT; |
| 1598 | return 0; |
| 1599 | } |
| 1600 | |
| 1601 | static int snd_pcm_oss_get_mapbuf(snd_pcm_oss_file_t *pcm_oss_file, int stream, struct buffmem_desc __user * _info) |
| 1602 | { |
| 1603 | // it won't be probably implemented |
| 1604 | // snd_printd("TODO: snd_pcm_oss_get_mapbuf\n"); |
| 1605 | return -EINVAL; |
| 1606 | } |
| 1607 | |
| 1608 | static snd_pcm_oss_setup_t *snd_pcm_oss_look_for_setup(snd_pcm_t *pcm, int stream, const char *task_name) |
| 1609 | { |
| 1610 | const char *ptr, *ptrl; |
| 1611 | snd_pcm_oss_setup_t *setup; |
| 1612 | |
| 1613 | down(&pcm->streams[stream].oss.setup_mutex); |
| 1614 | for (setup = pcm->streams[stream].oss.setup_list; setup; setup = setup->next) { |
| 1615 | if (!strcmp(setup->task_name, task_name)) { |
| 1616 | up(&pcm->streams[stream].oss.setup_mutex); |
| 1617 | return setup; |
| 1618 | } |
| 1619 | } |
| 1620 | ptr = ptrl = task_name; |
| 1621 | while (*ptr) { |
| 1622 | if (*ptr == '/') |
| 1623 | ptrl = ptr + 1; |
| 1624 | ptr++; |
| 1625 | } |
| 1626 | if (ptrl == task_name) { |
| 1627 | goto __not_found; |
| 1628 | return NULL; |
| 1629 | } |
| 1630 | for (setup = pcm->streams[stream].oss.setup_list; setup; setup = setup->next) { |
| 1631 | if (!strcmp(setup->task_name, ptrl)) { |
| 1632 | up(&pcm->streams[stream].oss.setup_mutex); |
| 1633 | return setup; |
| 1634 | } |
| 1635 | } |
| 1636 | __not_found: |
| 1637 | up(&pcm->streams[stream].oss.setup_mutex); |
| 1638 | return NULL; |
| 1639 | } |
| 1640 | |
| 1641 | static void snd_pcm_oss_init_substream(snd_pcm_substream_t *substream, |
| 1642 | snd_pcm_oss_setup_t *setup, |
| 1643 | int minor) |
| 1644 | { |
| 1645 | snd_pcm_runtime_t *runtime; |
| 1646 | |
| 1647 | substream->oss.oss = 1; |
| 1648 | substream->oss.setup = setup; |
| 1649 | runtime = substream->runtime; |
| 1650 | runtime->oss.params = 1; |
| 1651 | runtime->oss.trigger = 1; |
| 1652 | runtime->oss.rate = 8000; |
| 1653 | switch (SNDRV_MINOR_OSS_DEVICE(minor)) { |
| 1654 | case SNDRV_MINOR_OSS_PCM_8: |
| 1655 | runtime->oss.format = AFMT_U8; |
| 1656 | break; |
| 1657 | case SNDRV_MINOR_OSS_PCM_16: |
| 1658 | runtime->oss.format = AFMT_S16_LE; |
| 1659 | break; |
| 1660 | default: |
| 1661 | runtime->oss.format = AFMT_MU_LAW; |
| 1662 | } |
| 1663 | runtime->oss.channels = 1; |
| 1664 | runtime->oss.fragshift = 0; |
| 1665 | runtime->oss.maxfrags = 0; |
| 1666 | runtime->oss.subdivision = 0; |
| 1667 | } |
| 1668 | |
| 1669 | static void snd_pcm_oss_release_substream(snd_pcm_substream_t *substream) |
| 1670 | { |
| 1671 | snd_pcm_runtime_t *runtime; |
| 1672 | runtime = substream->runtime; |
| 1673 | vfree(runtime->oss.buffer); |
| 1674 | snd_pcm_oss_plugin_clear(substream); |
| 1675 | substream->oss.file = NULL; |
| 1676 | substream->oss.oss = 0; |
| 1677 | } |
| 1678 | |
| 1679 | static int snd_pcm_oss_release_file(snd_pcm_oss_file_t *pcm_oss_file) |
| 1680 | { |
| 1681 | int cidx; |
| 1682 | snd_assert(pcm_oss_file != NULL, return -ENXIO); |
| 1683 | for (cidx = 0; cidx < 2; ++cidx) { |
| 1684 | snd_pcm_substream_t *substream = pcm_oss_file->streams[cidx]; |
| 1685 | snd_pcm_runtime_t *runtime; |
| 1686 | if (substream == NULL) |
| 1687 | continue; |
| 1688 | runtime = substream->runtime; |
| 1689 | |
| 1690 | snd_pcm_stream_lock_irq(substream); |
| 1691 | if (snd_pcm_running(substream)) |
| 1692 | snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP); |
| 1693 | snd_pcm_stream_unlock_irq(substream); |
| 1694 | if (substream->open_flag) { |
| 1695 | if (substream->ops->hw_free != NULL) |
| 1696 | substream->ops->hw_free(substream); |
| 1697 | substream->ops->close(substream); |
| 1698 | substream->open_flag = 0; |
| 1699 | } |
| 1700 | substream->ffile = NULL; |
| 1701 | snd_pcm_oss_release_substream(substream); |
| 1702 | snd_pcm_release_substream(substream); |
| 1703 | } |
| 1704 | kfree(pcm_oss_file); |
| 1705 | return 0; |
| 1706 | } |
| 1707 | |
| 1708 | static int snd_pcm_oss_open_file(struct file *file, |
| 1709 | snd_pcm_t *pcm, |
| 1710 | snd_pcm_oss_file_t **rpcm_oss_file, |
| 1711 | int minor, |
| 1712 | snd_pcm_oss_setup_t *psetup, |
| 1713 | snd_pcm_oss_setup_t *csetup) |
| 1714 | { |
| 1715 | int err = 0; |
| 1716 | snd_pcm_oss_file_t *pcm_oss_file; |
| 1717 | snd_pcm_substream_t *psubstream = NULL, *csubstream = NULL; |
| 1718 | unsigned int f_mode = file->f_mode; |
| 1719 | |
| 1720 | snd_assert(rpcm_oss_file != NULL, return -EINVAL); |
| 1721 | *rpcm_oss_file = NULL; |
| 1722 | |
| 1723 | pcm_oss_file = kcalloc(1, sizeof(*pcm_oss_file), GFP_KERNEL); |
| 1724 | if (pcm_oss_file == NULL) |
| 1725 | return -ENOMEM; |
| 1726 | |
| 1727 | if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) && |
| 1728 | (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)) |
| 1729 | f_mode = FMODE_WRITE; |
| 1730 | if ((f_mode & FMODE_WRITE) && !(psetup && psetup->disable)) { |
| 1731 | if ((err = snd_pcm_open_substream(pcm, SNDRV_PCM_STREAM_PLAYBACK, |
| 1732 | &psubstream)) < 0) { |
| 1733 | snd_pcm_oss_release_file(pcm_oss_file); |
| 1734 | return err; |
| 1735 | } |
| 1736 | pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK] = psubstream; |
| 1737 | } |
| 1738 | if ((f_mode & FMODE_READ) && !(csetup && csetup->disable)) { |
| 1739 | if ((err = snd_pcm_open_substream(pcm, SNDRV_PCM_STREAM_CAPTURE, |
| 1740 | &csubstream)) < 0) { |
| 1741 | if (!(f_mode & FMODE_WRITE) || err != -ENODEV) { |
| 1742 | snd_pcm_oss_release_file(pcm_oss_file); |
| 1743 | return err; |
| 1744 | } else { |
| 1745 | csubstream = NULL; |
| 1746 | } |
| 1747 | } |
| 1748 | pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE] = csubstream; |
| 1749 | } |
| 1750 | |
| 1751 | if (psubstream == NULL && csubstream == NULL) { |
| 1752 | snd_pcm_oss_release_file(pcm_oss_file); |
| 1753 | return -EINVAL; |
| 1754 | } |
| 1755 | if (psubstream != NULL) { |
| 1756 | psubstream->oss.file = pcm_oss_file; |
| 1757 | err = snd_pcm_hw_constraints_init(psubstream); |
| 1758 | if (err < 0) { |
| 1759 | snd_printd("snd_pcm_hw_constraint_init failed\n"); |
| 1760 | snd_pcm_oss_release_file(pcm_oss_file); |
| 1761 | return err; |
| 1762 | } |
| 1763 | if ((err = psubstream->ops->open(psubstream)) < 0) { |
| 1764 | snd_pcm_oss_release_file(pcm_oss_file); |
| 1765 | return err; |
| 1766 | } |
| 1767 | psubstream->open_flag = 1; |
| 1768 | err = snd_pcm_hw_constraints_complete(psubstream); |
| 1769 | if (err < 0) { |
| 1770 | snd_printd("snd_pcm_hw_constraint_complete failed\n"); |
| 1771 | snd_pcm_oss_release_file(pcm_oss_file); |
| 1772 | return err; |
| 1773 | } |
| 1774 | psubstream->ffile = file; |
| 1775 | snd_pcm_oss_init_substream(psubstream, psetup, minor); |
| 1776 | } |
| 1777 | if (csubstream != NULL) { |
| 1778 | csubstream->oss.file = pcm_oss_file; |
| 1779 | err = snd_pcm_hw_constraints_init(csubstream); |
| 1780 | if (err < 0) { |
| 1781 | snd_printd("snd_pcm_hw_constraint_init failed\n"); |
| 1782 | snd_pcm_oss_release_file(pcm_oss_file); |
| 1783 | return err; |
| 1784 | } |
| 1785 | if ((err = csubstream->ops->open(csubstream)) < 0) { |
| 1786 | snd_pcm_oss_release_file(pcm_oss_file); |
| 1787 | return err; |
| 1788 | } |
| 1789 | csubstream->open_flag = 1; |
| 1790 | err = snd_pcm_hw_constraints_complete(csubstream); |
| 1791 | if (err < 0) { |
| 1792 | snd_printd("snd_pcm_hw_constraint_complete failed\n"); |
| 1793 | snd_pcm_oss_release_file(pcm_oss_file); |
| 1794 | return err; |
| 1795 | } |
| 1796 | csubstream->ffile = file; |
| 1797 | snd_pcm_oss_init_substream(csubstream, csetup, minor); |
| 1798 | } |
| 1799 | |
| 1800 | file->private_data = pcm_oss_file; |
| 1801 | *rpcm_oss_file = pcm_oss_file; |
| 1802 | return 0; |
| 1803 | } |
| 1804 | |
| 1805 | |
| 1806 | static int snd_pcm_oss_open(struct inode *inode, struct file *file) |
| 1807 | { |
| 1808 | int minor = iminor(inode); |
| 1809 | int cardnum = SNDRV_MINOR_OSS_CARD(minor); |
| 1810 | int device; |
| 1811 | int err; |
| 1812 | char task_name[32]; |
| 1813 | snd_pcm_t *pcm; |
| 1814 | snd_pcm_oss_file_t *pcm_oss_file; |
| 1815 | snd_pcm_oss_setup_t *psetup = NULL, *csetup = NULL; |
| 1816 | int nonblock; |
| 1817 | wait_queue_t wait; |
| 1818 | |
| 1819 | snd_assert(cardnum >= 0 && cardnum < SNDRV_CARDS, return -ENXIO); |
| 1820 | device = SNDRV_MINOR_OSS_DEVICE(minor) == SNDRV_MINOR_OSS_PCM1 ? |
| 1821 | adsp_map[cardnum] : dsp_map[cardnum]; |
| 1822 | |
| 1823 | pcm = snd_pcm_devices[(cardnum * SNDRV_PCM_DEVICES) + device]; |
| 1824 | if (pcm == NULL) { |
| 1825 | err = -ENODEV; |
| 1826 | goto __error1; |
| 1827 | } |
| 1828 | err = snd_card_file_add(pcm->card, file); |
| 1829 | if (err < 0) |
| 1830 | goto __error1; |
| 1831 | if (!try_module_get(pcm->card->module)) { |
| 1832 | err = -EFAULT; |
| 1833 | goto __error2; |
| 1834 | } |
| 1835 | if (snd_task_name(current, task_name, sizeof(task_name)) < 0) { |
| 1836 | err = -EFAULT; |
| 1837 | goto __error; |
| 1838 | } |
| 1839 | if (file->f_mode & FMODE_WRITE) |
| 1840 | psetup = snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK, task_name); |
| 1841 | if (file->f_mode & FMODE_READ) |
| 1842 | csetup = snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE, task_name); |
| 1843 | |
| 1844 | nonblock = !!(file->f_flags & O_NONBLOCK); |
| 1845 | if (psetup && !psetup->disable) { |
| 1846 | if (psetup->nonblock) |
| 1847 | nonblock = 1; |
| 1848 | else if (psetup->block) |
| 1849 | nonblock = 0; |
| 1850 | } else if (csetup && !csetup->disable) { |
| 1851 | if (csetup->nonblock) |
| 1852 | nonblock = 1; |
| 1853 | else if (csetup->block) |
| 1854 | nonblock = 0; |
| 1855 | } |
| 1856 | if (!nonblock) |
| 1857 | nonblock = nonblock_open; |
| 1858 | |
| 1859 | init_waitqueue_entry(&wait, current); |
| 1860 | add_wait_queue(&pcm->open_wait, &wait); |
| 1861 | down(&pcm->open_mutex); |
| 1862 | while (1) { |
| 1863 | err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file, |
| 1864 | minor, psetup, csetup); |
| 1865 | if (err >= 0) |
| 1866 | break; |
| 1867 | if (err == -EAGAIN) { |
| 1868 | if (nonblock) { |
| 1869 | err = -EBUSY; |
| 1870 | break; |
| 1871 | } |
| 1872 | } else |
| 1873 | break; |
| 1874 | set_current_state(TASK_INTERRUPTIBLE); |
| 1875 | up(&pcm->open_mutex); |
| 1876 | schedule(); |
| 1877 | down(&pcm->open_mutex); |
| 1878 | if (signal_pending(current)) { |
| 1879 | err = -ERESTARTSYS; |
| 1880 | break; |
| 1881 | } |
| 1882 | } |
| 1883 | remove_wait_queue(&pcm->open_wait, &wait); |
| 1884 | up(&pcm->open_mutex); |
| 1885 | if (err < 0) |
| 1886 | goto __error; |
| 1887 | return err; |
| 1888 | |
| 1889 | __error: |
| 1890 | module_put(pcm->card->module); |
| 1891 | __error2: |
| 1892 | snd_card_file_remove(pcm->card, file); |
| 1893 | __error1: |
| 1894 | return err; |
| 1895 | } |
| 1896 | |
| 1897 | static int snd_pcm_oss_release(struct inode *inode, struct file *file) |
| 1898 | { |
| 1899 | snd_pcm_t *pcm; |
| 1900 | snd_pcm_substream_t *substream; |
| 1901 | snd_pcm_oss_file_t *pcm_oss_file; |
| 1902 | |
| 1903 | pcm_oss_file = file->private_data; |
| 1904 | substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; |
| 1905 | if (substream == NULL) |
| 1906 | substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; |
| 1907 | snd_assert(substream != NULL, return -ENXIO); |
| 1908 | pcm = substream->pcm; |
| 1909 | snd_pcm_oss_sync(pcm_oss_file); |
| 1910 | down(&pcm->open_mutex); |
| 1911 | snd_pcm_oss_release_file(pcm_oss_file); |
| 1912 | up(&pcm->open_mutex); |
| 1913 | wake_up(&pcm->open_wait); |
| 1914 | module_put(pcm->card->module); |
| 1915 | snd_card_file_remove(pcm->card, file); |
| 1916 | return 0; |
| 1917 | } |
| 1918 | |
| 1919 | static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
| 1920 | { |
| 1921 | snd_pcm_oss_file_t *pcm_oss_file; |
| 1922 | int __user *p = (int __user *)arg; |
| 1923 | int res; |
| 1924 | |
| 1925 | pcm_oss_file = file->private_data; |
| 1926 | if (cmd == OSS_GETVERSION) |
| 1927 | return put_user(SNDRV_OSS_VERSION, p); |
| 1928 | if (cmd == OSS_ALSAEMULVER) |
| 1929 | return put_user(1, p); |
| 1930 | #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE)) |
| 1931 | if (((cmd >> 8) & 0xff) == 'M') { /* mixer ioctl - for OSS compatibility */ |
| 1932 | snd_pcm_substream_t *substream; |
| 1933 | int idx; |
| 1934 | for (idx = 0; idx < 2; ++idx) { |
| 1935 | substream = pcm_oss_file->streams[idx]; |
| 1936 | if (substream != NULL) |
| 1937 | break; |
| 1938 | } |
| 1939 | snd_assert(substream != NULL, return -ENXIO); |
| 1940 | return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg); |
| 1941 | } |
| 1942 | #endif |
| 1943 | if (((cmd >> 8) & 0xff) != 'P') |
| 1944 | return -EINVAL; |
| 1945 | #ifdef OSS_DEBUG |
| 1946 | printk("pcm_oss: ioctl = 0x%x\n", cmd); |
| 1947 | #endif |
| 1948 | switch (cmd) { |
| 1949 | case SNDCTL_DSP_RESET: |
| 1950 | return snd_pcm_oss_reset(pcm_oss_file); |
| 1951 | case SNDCTL_DSP_SYNC: |
| 1952 | return snd_pcm_oss_sync(pcm_oss_file); |
| 1953 | case SNDCTL_DSP_SPEED: |
| 1954 | if (get_user(res, p)) |
| 1955 | return -EFAULT; |
| 1956 | if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0) |
| 1957 | return res; |
| 1958 | return put_user(res, p); |
| 1959 | case SOUND_PCM_READ_RATE: |
| 1960 | res = snd_pcm_oss_get_rate(pcm_oss_file); |
| 1961 | if (res < 0) |
| 1962 | return res; |
| 1963 | return put_user(res, p); |
| 1964 | case SNDCTL_DSP_STEREO: |
| 1965 | if (get_user(res, p)) |
| 1966 | return -EFAULT; |
| 1967 | res = res > 0 ? 2 : 1; |
| 1968 | if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0) |
| 1969 | return res; |
| 1970 | return put_user(--res, p); |
| 1971 | case SNDCTL_DSP_GETBLKSIZE: |
| 1972 | res = snd_pcm_oss_get_block_size(pcm_oss_file); |
| 1973 | if (res < 0) |
| 1974 | return res; |
| 1975 | return put_user(res, p); |
| 1976 | case SNDCTL_DSP_SETFMT: |
| 1977 | if (get_user(res, p)) |
| 1978 | return -EFAULT; |
| 1979 | res = snd_pcm_oss_set_format(pcm_oss_file, res); |
| 1980 | if (res < 0) |
| 1981 | return res; |
| 1982 | return put_user(res, p); |
| 1983 | case SOUND_PCM_READ_BITS: |
| 1984 | res = snd_pcm_oss_get_format(pcm_oss_file); |
| 1985 | if (res < 0) |
| 1986 | return res; |
| 1987 | return put_user(res, p); |
| 1988 | case SNDCTL_DSP_CHANNELS: |
| 1989 | if (get_user(res, p)) |
| 1990 | return -EFAULT; |
| 1991 | res = snd_pcm_oss_set_channels(pcm_oss_file, res); |
| 1992 | if (res < 0) |
| 1993 | return res; |
| 1994 | return put_user(res, p); |
| 1995 | case SOUND_PCM_READ_CHANNELS: |
| 1996 | res = snd_pcm_oss_get_channels(pcm_oss_file); |
| 1997 | if (res < 0) |
| 1998 | return res; |
| 1999 | return put_user(res, p); |
| 2000 | case SOUND_PCM_WRITE_FILTER: |
| 2001 | case SOUND_PCM_READ_FILTER: |
| 2002 | return -EIO; |
| 2003 | case SNDCTL_DSP_POST: |
| 2004 | return snd_pcm_oss_post(pcm_oss_file); |
| 2005 | case SNDCTL_DSP_SUBDIVIDE: |
| 2006 | if (get_user(res, p)) |
| 2007 | return -EFAULT; |
| 2008 | res = snd_pcm_oss_set_subdivide(pcm_oss_file, res); |
| 2009 | if (res < 0) |
| 2010 | return res; |
| 2011 | return put_user(res, p); |
| 2012 | case SNDCTL_DSP_SETFRAGMENT: |
| 2013 | if (get_user(res, p)) |
| 2014 | return -EFAULT; |
| 2015 | return snd_pcm_oss_set_fragment(pcm_oss_file, res); |
| 2016 | case SNDCTL_DSP_GETFMTS: |
| 2017 | res = snd_pcm_oss_get_formats(pcm_oss_file); |
| 2018 | if (res < 0) |
| 2019 | return res; |
| 2020 | return put_user(res, p); |
| 2021 | case SNDCTL_DSP_GETOSPACE: |
| 2022 | case SNDCTL_DSP_GETISPACE: |
| 2023 | return snd_pcm_oss_get_space(pcm_oss_file, |
| 2024 | cmd == SNDCTL_DSP_GETISPACE ? |
| 2025 | SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, |
| 2026 | (struct audio_buf_info __user *) arg); |
| 2027 | case SNDCTL_DSP_NONBLOCK: |
| 2028 | return snd_pcm_oss_nonblock(file); |
| 2029 | case SNDCTL_DSP_GETCAPS: |
| 2030 | res = snd_pcm_oss_get_caps(pcm_oss_file); |
| 2031 | if (res < 0) |
| 2032 | return res; |
| 2033 | return put_user(res, p); |
| 2034 | case SNDCTL_DSP_GETTRIGGER: |
| 2035 | res = snd_pcm_oss_get_trigger(pcm_oss_file); |
| 2036 | if (res < 0) |
| 2037 | return res; |
| 2038 | return put_user(res, p); |
| 2039 | case SNDCTL_DSP_SETTRIGGER: |
| 2040 | if (get_user(res, p)) |
| 2041 | return -EFAULT; |
| 2042 | return snd_pcm_oss_set_trigger(pcm_oss_file, res); |
| 2043 | case SNDCTL_DSP_GETIPTR: |
| 2044 | case SNDCTL_DSP_GETOPTR: |
| 2045 | return snd_pcm_oss_get_ptr(pcm_oss_file, |
| 2046 | cmd == SNDCTL_DSP_GETIPTR ? |
| 2047 | SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, |
| 2048 | (struct count_info __user *) arg); |
| 2049 | case SNDCTL_DSP_MAPINBUF: |
| 2050 | case SNDCTL_DSP_MAPOUTBUF: |
| 2051 | return snd_pcm_oss_get_mapbuf(pcm_oss_file, |
| 2052 | cmd == SNDCTL_DSP_MAPINBUF ? |
| 2053 | SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK, |
| 2054 | (struct buffmem_desc __user *) arg); |
| 2055 | case SNDCTL_DSP_SETSYNCRO: |
| 2056 | /* stop DMA now.. */ |
| 2057 | return 0; |
| 2058 | case SNDCTL_DSP_SETDUPLEX: |
| 2059 | if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX) |
| 2060 | return 0; |
| 2061 | return -EIO; |
| 2062 | case SNDCTL_DSP_GETODELAY: |
| 2063 | res = snd_pcm_oss_get_odelay(pcm_oss_file); |
| 2064 | if (res < 0) { |
| 2065 | /* it's for sure, some broken apps don't check for error codes */ |
| 2066 | put_user(0, p); |
| 2067 | return res; |
| 2068 | } |
| 2069 | return put_user(res, p); |
| 2070 | case SNDCTL_DSP_PROFILE: |
| 2071 | return 0; /* silently ignore */ |
| 2072 | default: |
| 2073 | snd_printd("pcm_oss: unknown command = 0x%x\n", cmd); |
| 2074 | } |
| 2075 | return -EINVAL; |
| 2076 | } |
| 2077 | |
| 2078 | #ifdef CONFIG_COMPAT |
| 2079 | /* all compatible */ |
| 2080 | #define snd_pcm_oss_ioctl_compat snd_pcm_oss_ioctl |
| 2081 | #else |
| 2082 | #define snd_pcm_oss_ioctl_compat NULL |
| 2083 | #endif |
| 2084 | |
| 2085 | static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset) |
| 2086 | { |
| 2087 | snd_pcm_oss_file_t *pcm_oss_file; |
| 2088 | snd_pcm_substream_t *substream; |
| 2089 | |
| 2090 | pcm_oss_file = file->private_data; |
| 2091 | substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; |
| 2092 | if (substream == NULL) |
| 2093 | return -ENXIO; |
| 2094 | #ifndef OSS_DEBUG |
| 2095 | return snd_pcm_oss_read1(substream, buf, count); |
| 2096 | #else |
| 2097 | { |
| 2098 | ssize_t res = snd_pcm_oss_read1(substream, buf, count); |
| 2099 | printk("pcm_oss: read %li bytes (returned %li bytes)\n", (long)count, (long)res); |
| 2100 | return res; |
| 2101 | } |
| 2102 | #endif |
| 2103 | } |
| 2104 | |
| 2105 | static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset) |
| 2106 | { |
| 2107 | snd_pcm_oss_file_t *pcm_oss_file; |
| 2108 | snd_pcm_substream_t *substream; |
| 2109 | long result; |
| 2110 | |
| 2111 | pcm_oss_file = file->private_data; |
| 2112 | substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; |
| 2113 | if (substream == NULL) |
| 2114 | return -ENXIO; |
| 2115 | up(&file->f_dentry->d_inode->i_sem); |
| 2116 | result = snd_pcm_oss_write1(substream, buf, count); |
| 2117 | down(&file->f_dentry->d_inode->i_sem); |
| 2118 | #ifdef OSS_DEBUG |
| 2119 | printk("pcm_oss: write %li bytes (wrote %li bytes)\n", (long)count, (long)result); |
| 2120 | #endif |
| 2121 | return result; |
| 2122 | } |
| 2123 | |
| 2124 | static int snd_pcm_oss_playback_ready(snd_pcm_substream_t *substream) |
| 2125 | { |
| 2126 | snd_pcm_runtime_t *runtime = substream->runtime; |
| 2127 | if (atomic_read(&runtime->mmap_count)) |
| 2128 | return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt; |
| 2129 | else |
| 2130 | return snd_pcm_playback_avail(runtime) >= runtime->oss.period_frames; |
| 2131 | } |
| 2132 | |
| 2133 | static int snd_pcm_oss_capture_ready(snd_pcm_substream_t *substream) |
| 2134 | { |
| 2135 | snd_pcm_runtime_t *runtime = substream->runtime; |
| 2136 | if (atomic_read(&runtime->mmap_count)) |
| 2137 | return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt; |
| 2138 | else |
| 2139 | return snd_pcm_capture_avail(runtime) >= runtime->oss.period_frames; |
| 2140 | } |
| 2141 | |
| 2142 | static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait) |
| 2143 | { |
| 2144 | snd_pcm_oss_file_t *pcm_oss_file; |
| 2145 | unsigned int mask; |
| 2146 | snd_pcm_substream_t *psubstream = NULL, *csubstream = NULL; |
| 2147 | |
| 2148 | pcm_oss_file = file->private_data; |
| 2149 | |
| 2150 | psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; |
| 2151 | csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; |
| 2152 | |
| 2153 | mask = 0; |
| 2154 | if (psubstream != NULL) { |
| 2155 | snd_pcm_runtime_t *runtime = psubstream->runtime; |
| 2156 | poll_wait(file, &runtime->sleep, wait); |
| 2157 | snd_pcm_stream_lock_irq(psubstream); |
| 2158 | if (runtime->status->state != SNDRV_PCM_STATE_DRAINING && |
| 2159 | (runtime->status->state != SNDRV_PCM_STATE_RUNNING || |
| 2160 | snd_pcm_oss_playback_ready(psubstream))) |
| 2161 | mask |= POLLOUT | POLLWRNORM; |
| 2162 | snd_pcm_stream_unlock_irq(psubstream); |
| 2163 | } |
| 2164 | if (csubstream != NULL) { |
| 2165 | snd_pcm_runtime_t *runtime = csubstream->runtime; |
| 2166 | enum sndrv_pcm_state ostate; |
| 2167 | poll_wait(file, &runtime->sleep, wait); |
| 2168 | snd_pcm_stream_lock_irq(csubstream); |
| 2169 | if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING || |
| 2170 | snd_pcm_oss_capture_ready(csubstream)) |
| 2171 | mask |= POLLIN | POLLRDNORM; |
| 2172 | snd_pcm_stream_unlock_irq(csubstream); |
| 2173 | if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) { |
| 2174 | snd_pcm_oss_file_t ofile; |
| 2175 | memset(&ofile, 0, sizeof(ofile)); |
| 2176 | ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; |
| 2177 | runtime->oss.trigger = 0; |
| 2178 | snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT); |
| 2179 | } |
| 2180 | } |
| 2181 | |
| 2182 | return mask; |
| 2183 | } |
| 2184 | |
| 2185 | static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area) |
| 2186 | { |
| 2187 | snd_pcm_oss_file_t *pcm_oss_file; |
| 2188 | snd_pcm_substream_t *substream = NULL; |
| 2189 | snd_pcm_runtime_t *runtime; |
| 2190 | int err; |
| 2191 | |
| 2192 | #ifdef OSS_DEBUG |
| 2193 | printk("pcm_oss: mmap begin\n"); |
| 2194 | #endif |
| 2195 | pcm_oss_file = file->private_data; |
| 2196 | switch ((area->vm_flags & (VM_READ | VM_WRITE))) { |
| 2197 | case VM_READ | VM_WRITE: |
| 2198 | substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; |
| 2199 | if (substream) |
| 2200 | break; |
| 2201 | /* Fall through */ |
| 2202 | case VM_READ: |
| 2203 | substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE]; |
| 2204 | break; |
| 2205 | case VM_WRITE: |
| 2206 | substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK]; |
| 2207 | break; |
| 2208 | default: |
| 2209 | return -EINVAL; |
| 2210 | } |
| 2211 | /* set VM_READ access as well to fix memset() routines that do |
| 2212 | reads before writes (to improve performance) */ |
| 2213 | area->vm_flags |= VM_READ; |
| 2214 | if (substream == NULL) |
| 2215 | return -ENXIO; |
| 2216 | runtime = substream->runtime; |
| 2217 | if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID)) |
| 2218 | return -EIO; |
| 2219 | if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED) |
| 2220 | runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED; |
| 2221 | else |
| 2222 | return -EIO; |
| 2223 | |
| 2224 | if (runtime->oss.params) { |
| 2225 | if ((err = snd_pcm_oss_change_params(substream)) < 0) |
| 2226 | return err; |
| 2227 | } |
| 2228 | if (runtime->oss.plugin_first != NULL) |
| 2229 | return -EIO; |
| 2230 | |
| 2231 | if (area->vm_pgoff != 0) |
| 2232 | return -EINVAL; |
| 2233 | |
| 2234 | err = snd_pcm_mmap_data(substream, file, area); |
| 2235 | if (err < 0) |
| 2236 | return err; |
| 2237 | runtime->oss.mmap_bytes = area->vm_end - area->vm_start; |
| 2238 | runtime->silence_threshold = 0; |
| 2239 | runtime->silence_size = 0; |
| 2240 | #ifdef OSS_DEBUG |
| 2241 | printk("pcm_oss: mmap ok, bytes = 0x%x\n", runtime->oss.mmap_bytes); |
| 2242 | #endif |
| 2243 | /* In mmap mode we never stop */ |
| 2244 | runtime->stop_threshold = runtime->boundary; |
| 2245 | |
| 2246 | return 0; |
| 2247 | } |
| 2248 | |
| 2249 | /* |
| 2250 | * /proc interface |
| 2251 | */ |
| 2252 | |
| 2253 | static void snd_pcm_oss_proc_read(snd_info_entry_t *entry, |
| 2254 | snd_info_buffer_t * buffer) |
| 2255 | { |
| 2256 | snd_pcm_str_t *pstr = (snd_pcm_str_t *)entry->private_data; |
| 2257 | snd_pcm_oss_setup_t *setup = pstr->oss.setup_list; |
| 2258 | down(&pstr->oss.setup_mutex); |
| 2259 | while (setup) { |
| 2260 | snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n", |
| 2261 | setup->task_name, |
| 2262 | setup->periods, |
| 2263 | setup->period_size, |
| 2264 | setup->disable ? " disable" : "", |
| 2265 | setup->direct ? " direct" : "", |
| 2266 | setup->block ? " block" : "", |
| 2267 | setup->nonblock ? " non-block" : "", |
| 2268 | setup->partialfrag ? " partial-frag" : "", |
| 2269 | setup->nosilence ? " no-silence" : ""); |
| 2270 | setup = setup->next; |
| 2271 | } |
| 2272 | up(&pstr->oss.setup_mutex); |
| 2273 | } |
| 2274 | |
| 2275 | static void snd_pcm_oss_proc_free_setup_list(snd_pcm_str_t * pstr) |
| 2276 | { |
| 2277 | unsigned int idx; |
| 2278 | snd_pcm_substream_t *substream; |
| 2279 | snd_pcm_oss_setup_t *setup, *setupn; |
| 2280 | |
| 2281 | for (idx = 0, substream = pstr->substream; |
| 2282 | idx < pstr->substream_count; idx++, substream = substream->next) |
| 2283 | substream->oss.setup = NULL; |
| 2284 | for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL; |
| 2285 | setup; setup = setupn) { |
| 2286 | setupn = setup->next; |
| 2287 | kfree(setup->task_name); |
| 2288 | kfree(setup); |
| 2289 | } |
| 2290 | pstr->oss.setup_list = NULL; |
| 2291 | } |
| 2292 | |
| 2293 | static void snd_pcm_oss_proc_write(snd_info_entry_t *entry, |
| 2294 | snd_info_buffer_t * buffer) |
| 2295 | { |
| 2296 | snd_pcm_str_t *pstr = (snd_pcm_str_t *)entry->private_data; |
| 2297 | char line[128], str[32], task_name[32], *ptr; |
| 2298 | int idx1; |
| 2299 | snd_pcm_oss_setup_t *setup, *setup1, template; |
| 2300 | |
| 2301 | while (!snd_info_get_line(buffer, line, sizeof(line))) { |
| 2302 | down(&pstr->oss.setup_mutex); |
| 2303 | memset(&template, 0, sizeof(template)); |
| 2304 | ptr = snd_info_get_str(task_name, line, sizeof(task_name)); |
| 2305 | if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) { |
| 2306 | snd_pcm_oss_proc_free_setup_list(pstr); |
| 2307 | up(&pstr->oss.setup_mutex); |
| 2308 | continue; |
| 2309 | } |
| 2310 | for (setup = pstr->oss.setup_list; setup; setup = setup->next) { |
| 2311 | if (!strcmp(setup->task_name, task_name)) { |
| 2312 | template = *setup; |
| 2313 | break; |
| 2314 | } |
| 2315 | } |
| 2316 | ptr = snd_info_get_str(str, ptr, sizeof(str)); |
| 2317 | template.periods = simple_strtoul(str, NULL, 10); |
| 2318 | ptr = snd_info_get_str(str, ptr, sizeof(str)); |
| 2319 | template.period_size = simple_strtoul(str, NULL, 10); |
| 2320 | for (idx1 = 31; idx1 >= 0; idx1--) |
| 2321 | if (template.period_size & (1 << idx1)) |
| 2322 | break; |
| 2323 | for (idx1--; idx1 >= 0; idx1--) |
| 2324 | template.period_size &= ~(1 << idx1); |
| 2325 | do { |
| 2326 | ptr = snd_info_get_str(str, ptr, sizeof(str)); |
| 2327 | if (!strcmp(str, "disable")) { |
| 2328 | template.disable = 1; |
| 2329 | } else if (!strcmp(str, "direct")) { |
| 2330 | template.direct = 1; |
| 2331 | } else if (!strcmp(str, "block")) { |
| 2332 | template.block = 1; |
| 2333 | } else if (!strcmp(str, "non-block")) { |
| 2334 | template.nonblock = 1; |
| 2335 | } else if (!strcmp(str, "partial-frag")) { |
| 2336 | template.partialfrag = 1; |
| 2337 | } else if (!strcmp(str, "no-silence")) { |
| 2338 | template.nosilence = 1; |
| 2339 | } |
| 2340 | } while (*str); |
| 2341 | if (setup == NULL) { |
| 2342 | setup = (snd_pcm_oss_setup_t *) kmalloc(sizeof(snd_pcm_oss_setup_t), GFP_KERNEL); |
| 2343 | if (setup) { |
| 2344 | if (pstr->oss.setup_list == NULL) { |
| 2345 | pstr->oss.setup_list = setup; |
| 2346 | } else { |
| 2347 | for (setup1 = pstr->oss.setup_list; setup1->next; setup1 = setup1->next); |
| 2348 | setup1->next = setup; |
| 2349 | } |
| 2350 | template.task_name = snd_kmalloc_strdup(task_name, GFP_KERNEL); |
| 2351 | } else { |
| 2352 | buffer->error = -ENOMEM; |
| 2353 | } |
| 2354 | } |
| 2355 | if (setup) |
| 2356 | *setup = template; |
| 2357 | up(&pstr->oss.setup_mutex); |
| 2358 | } |
| 2359 | } |
| 2360 | |
| 2361 | static void snd_pcm_oss_proc_init(snd_pcm_t *pcm) |
| 2362 | { |
| 2363 | int stream; |
| 2364 | for (stream = 0; stream < 2; ++stream) { |
| 2365 | snd_info_entry_t *entry; |
| 2366 | snd_pcm_str_t *pstr = &pcm->streams[stream]; |
| 2367 | if (pstr->substream_count == 0) |
| 2368 | continue; |
| 2369 | if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) { |
| 2370 | entry->content = SNDRV_INFO_CONTENT_TEXT; |
| 2371 | entry->mode = S_IFREG | S_IRUGO | S_IWUSR; |
| 2372 | entry->c.text.read_size = 8192; |
| 2373 | entry->c.text.read = snd_pcm_oss_proc_read; |
| 2374 | entry->c.text.write_size = 8192; |
| 2375 | entry->c.text.write = snd_pcm_oss_proc_write; |
| 2376 | entry->private_data = pstr; |
| 2377 | if (snd_info_register(entry) < 0) { |
| 2378 | snd_info_free_entry(entry); |
| 2379 | entry = NULL; |
| 2380 | } |
| 2381 | } |
| 2382 | pstr->oss.proc_entry = entry; |
| 2383 | } |
| 2384 | } |
| 2385 | |
| 2386 | static void snd_pcm_oss_proc_done(snd_pcm_t *pcm) |
| 2387 | { |
| 2388 | int stream; |
| 2389 | for (stream = 0; stream < 2; ++stream) { |
| 2390 | snd_pcm_str_t *pstr = &pcm->streams[stream]; |
| 2391 | if (pstr->oss.proc_entry) { |
| 2392 | snd_info_unregister(pstr->oss.proc_entry); |
| 2393 | pstr->oss.proc_entry = NULL; |
| 2394 | snd_pcm_oss_proc_free_setup_list(pstr); |
| 2395 | } |
| 2396 | } |
| 2397 | } |
| 2398 | |
| 2399 | /* |
| 2400 | * ENTRY functions |
| 2401 | */ |
| 2402 | |
| 2403 | static struct file_operations snd_pcm_oss_f_reg = |
| 2404 | { |
| 2405 | .owner = THIS_MODULE, |
| 2406 | .read = snd_pcm_oss_read, |
| 2407 | .write = snd_pcm_oss_write, |
| 2408 | .open = snd_pcm_oss_open, |
| 2409 | .release = snd_pcm_oss_release, |
| 2410 | .poll = snd_pcm_oss_poll, |
| 2411 | .unlocked_ioctl = snd_pcm_oss_ioctl, |
| 2412 | .compat_ioctl = snd_pcm_oss_ioctl_compat, |
| 2413 | .mmap = snd_pcm_oss_mmap, |
| 2414 | }; |
| 2415 | |
| 2416 | static snd_minor_t snd_pcm_oss_reg = |
| 2417 | { |
| 2418 | .comment = "digital audio", |
| 2419 | .f_ops = &snd_pcm_oss_f_reg, |
| 2420 | }; |
| 2421 | |
| 2422 | static void register_oss_dsp(snd_pcm_t *pcm, int index) |
| 2423 | { |
| 2424 | char name[128]; |
| 2425 | sprintf(name, "dsp%i%i", pcm->card->number, pcm->device); |
| 2426 | if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, |
| 2427 | pcm->card, index, &snd_pcm_oss_reg, |
| 2428 | name) < 0) { |
| 2429 | snd_printk("unable to register OSS PCM device %i:%i\n", pcm->card->number, pcm->device); |
| 2430 | } |
| 2431 | } |
| 2432 | |
| 2433 | static int snd_pcm_oss_register_minor(snd_pcm_t * pcm) |
| 2434 | { |
| 2435 | pcm->oss.reg = 0; |
| 2436 | if (dsp_map[pcm->card->number] == (int)pcm->device) { |
| 2437 | char name[128]; |
| 2438 | int duplex; |
| 2439 | register_oss_dsp(pcm, 0); |
| 2440 | duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 && |
| 2441 | pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count && |
| 2442 | !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX)); |
| 2443 | sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : ""); |
| 2444 | #ifdef SNDRV_OSS_INFO_DEV_AUDIO |
| 2445 | snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO, |
| 2446 | pcm->card->number, |
| 2447 | name); |
| 2448 | #endif |
| 2449 | pcm->oss.reg++; |
| 2450 | pcm->oss.reg_mask |= 1; |
| 2451 | } |
| 2452 | if (adsp_map[pcm->card->number] == (int)pcm->device) { |
| 2453 | register_oss_dsp(pcm, 1); |
| 2454 | pcm->oss.reg++; |
| 2455 | pcm->oss.reg_mask |= 2; |
| 2456 | } |
| 2457 | |
| 2458 | if (pcm->oss.reg) |
| 2459 | snd_pcm_oss_proc_init(pcm); |
| 2460 | |
| 2461 | return 0; |
| 2462 | } |
| 2463 | |
| 2464 | static int snd_pcm_oss_disconnect_minor(snd_pcm_t * pcm) |
| 2465 | { |
| 2466 | if (pcm->oss.reg) { |
| 2467 | if (pcm->oss.reg_mask & 1) { |
| 2468 | pcm->oss.reg_mask &= ~1; |
| 2469 | snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, |
| 2470 | pcm->card, 0); |
| 2471 | } |
| 2472 | if (pcm->oss.reg_mask & 2) { |
| 2473 | pcm->oss.reg_mask &= ~2; |
| 2474 | snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM, |
| 2475 | pcm->card, 1); |
| 2476 | } |
| 2477 | } |
| 2478 | return 0; |
| 2479 | } |
| 2480 | |
| 2481 | static int snd_pcm_oss_unregister_minor(snd_pcm_t * pcm) |
| 2482 | { |
| 2483 | snd_pcm_oss_disconnect_minor(pcm); |
| 2484 | if (pcm->oss.reg) { |
| 2485 | if (dsp_map[pcm->card->number] == (int)pcm->device) { |
| 2486 | #ifdef SNDRV_OSS_INFO_DEV_AUDIO |
| 2487 | snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number); |
| 2488 | #endif |
| 2489 | } |
| 2490 | pcm->oss.reg = 0; |
| 2491 | snd_pcm_oss_proc_done(pcm); |
| 2492 | } |
| 2493 | return 0; |
| 2494 | } |
| 2495 | |
| 2496 | static snd_pcm_notify_t snd_pcm_oss_notify = |
| 2497 | { |
| 2498 | .n_register = snd_pcm_oss_register_minor, |
| 2499 | .n_disconnect = snd_pcm_oss_disconnect_minor, |
| 2500 | .n_unregister = snd_pcm_oss_unregister_minor, |
| 2501 | }; |
| 2502 | |
| 2503 | static int __init alsa_pcm_oss_init(void) |
| 2504 | { |
| 2505 | int i; |
| 2506 | int err; |
| 2507 | |
| 2508 | /* check device map table */ |
| 2509 | for (i = 0; i < SNDRV_CARDS; i++) { |
| 2510 | if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) { |
| 2511 | snd_printk("invalid dsp_map[%d] = %d\n", i, dsp_map[i]); |
| 2512 | dsp_map[i] = 0; |
| 2513 | } |
| 2514 | if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) { |
| 2515 | snd_printk("invalid adsp_map[%d] = %d\n", i, adsp_map[i]); |
| 2516 | adsp_map[i] = 1; |
| 2517 | } |
| 2518 | } |
| 2519 | if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0) |
| 2520 | return err; |
| 2521 | return 0; |
| 2522 | } |
| 2523 | |
| 2524 | static void __exit alsa_pcm_oss_exit(void) |
| 2525 | { |
| 2526 | snd_pcm_notify(&snd_pcm_oss_notify, 1); |
| 2527 | } |
| 2528 | |
| 2529 | module_init(alsa_pcm_oss_init) |
| 2530 | module_exit(alsa_pcm_oss_exit) |