sound/core/oss/pcm_oss.c

   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 <linux/string.h>
  37 #include <sound/core.h>
  38 #include <sound/minors.h>
  39 #include <sound/pcm.h>
  40 #include <sound/pcm_params.h>
  41 #include "pcm_plugin.h"
  42 #include <sound/info.h>
  43 #include <linux/soundcard.h>
  44 #include <sound/initval.h>
  45
  46 #define OSS_ALSAEMULVER         _SIOR ('M', 249, int)
  47
  48 static int dsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 0};
  49 static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
  50 static int nonblock_open = 1;
  51
  52 MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>, Abramo Bagnara <abramo@alsa-project.org>");
  53 MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
  54 MODULE_LICENSE("GPL");
  55 module_param_array(dsp_map, int, NULL, 0444);
  56 MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
  57 module_param_array(adsp_map, int, NULL, 0444);
  58 MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
  59 module_param(nonblock_open, bool, 0644);
  60 MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
  61 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
  62 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
  63
  64 extern int snd_mixer_oss_ioctl_card(struct snd_card *card, unsigned int cmd, unsigned long arg);
  65 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file);
  66 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file);
  67 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file);
  68
  69 static inline mm_segment_t snd_enter_user(void)
  70 {
  71         mm_segment_t fs = get_fs();
  72         set_fs(get_ds());
  73         return fs;
  74 }
  75
  76 static inline void snd_leave_user(mm_segment_t fs)
  77 {
  78         set_fs(fs);
  79 }
  80
  81 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
  82 static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream)
  83 {
  84         struct snd_pcm_runtime *runtime = substream->runtime;
  85         struct snd_pcm_plugin *plugin, *next;
  86
  87         plugin = runtime->oss.plugin_first;
  88         while (plugin) {
  89                 next = plugin->next;
  90                 snd_pcm_plugin_free(plugin);
  91                 plugin = next;
  92         }
  93         runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
  94         return 0;
  95 }
  96
  97 static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin)
  98 {
  99         struct snd_pcm_runtime *runtime = plugin->plug->runtime;
 100         plugin->next = runtime->oss.plugin_first;
 101         plugin->prev = NULL;
 102         if (runtime->oss.plugin_first) {
 103                 runtime->oss.plugin_first->prev = plugin;
 104                 runtime->oss.plugin_first = plugin;
 105         } else {
 106                 runtime->oss.plugin_last =
 107                 runtime->oss.plugin_first = plugin;
 108         }
 109         return 0;
 110 }
 111
 112 int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin)
 113 {
 114         struct snd_pcm_runtime *runtime = plugin->plug->runtime;
 115         plugin->next = NULL;
 116         plugin->prev = runtime->oss.plugin_last;
 117         if (runtime->oss.plugin_last) {
 118                 runtime->oss.plugin_last->next = plugin;
 119                 runtime->oss.plugin_last = plugin;
 120         } else {
 121                 runtime->oss.plugin_last =
 122                 runtime->oss.plugin_first = plugin;
 123         }
 124         return 0;
 125 }
 126 #endif /* CONFIG_SND_PCM_OSS_PLUGINS */
 127
 128 static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames)
 129 {
 130         struct snd_pcm_runtime *runtime = substream->runtime;
 131         long buffer_size = snd_pcm_lib_buffer_bytes(substream);
 132         long bytes = frames_to_bytes(runtime, frames);
 133         if (buffer_size == runtime->oss.buffer_bytes)
 134                 return bytes;
 135 #if BITS_PER_LONG >= 64
 136         return runtime->oss.buffer_bytes * bytes / buffer_size;
 137 #else
 138         {
 139                 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
 140                 u32 rem;
 141                 div64_32(&bsize, buffer_size, &rem);
 142                 return (long)bsize;
 143         }
 144 #endif
 145 }
 146
 147 static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes)
 148 {
 149         struct snd_pcm_runtime *runtime = substream->runtime;
 150         long buffer_size = snd_pcm_lib_buffer_bytes(substream);
 151         if (buffer_size == runtime->oss.buffer_bytes)
 152                 return bytes_to_frames(runtime, bytes);
 153         return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
 154 }
 155
 156 static int snd_pcm_oss_format_from(int format)
 157 {
 158         switch (format) {
 159         case AFMT_MU_LAW:       return SNDRV_PCM_FORMAT_MU_LAW;
 160         case AFMT_A_LAW:        return SNDRV_PCM_FORMAT_A_LAW;
 161         case AFMT_IMA_ADPCM:    return SNDRV_PCM_FORMAT_IMA_ADPCM;
 162         case AFMT_U8:           return SNDRV_PCM_FORMAT_U8;
 163         case AFMT_S16_LE:       return SNDRV_PCM_FORMAT_S16_LE;
 164         case AFMT_S16_BE:       return SNDRV_PCM_FORMAT_S16_BE;
 165         case AFMT_S8:           return SNDRV_PCM_FORMAT_S8;
 166         case AFMT_U16_LE:       return SNDRV_PCM_FORMAT_U16_LE;
 167         case AFMT_U16_BE:       return SNDRV_PCM_FORMAT_U16_BE;
 168         case AFMT_MPEG:         return SNDRV_PCM_FORMAT_MPEG;
 169         default:                return SNDRV_PCM_FORMAT_U8;
 170         }
 171 }
 172
 173 static int snd_pcm_oss_format_to(int format)
 174 {
 175         switch (format) {
 176         case SNDRV_PCM_FORMAT_MU_LAW:   return AFMT_MU_LAW;
 177         case SNDRV_PCM_FORMAT_A_LAW:    return AFMT_A_LAW;
 178         case SNDRV_PCM_FORMAT_IMA_ADPCM:        return AFMT_IMA_ADPCM;
 179         case SNDRV_PCM_FORMAT_U8:               return AFMT_U8;
 180         case SNDRV_PCM_FORMAT_S16_LE:   return AFMT_S16_LE;
 181         case SNDRV_PCM_FORMAT_S16_BE:   return AFMT_S16_BE;
 182         case SNDRV_PCM_FORMAT_S8:               return AFMT_S8;
 183         case SNDRV_PCM_FORMAT_U16_LE:   return AFMT_U16_LE;
 184         case SNDRV_PCM_FORMAT_U16_BE:   return AFMT_U16_BE;
 185         case SNDRV_PCM_FORMAT_MPEG:             return AFMT_MPEG;
 186         default:                        return -EINVAL;
 187         }
 188 }
 189
 190 static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream,
 191                                    struct snd_pcm_hw_params *oss_params,
 192                                    struct snd_pcm_hw_params *slave_params)
 193 {
 194         size_t s;
 195         size_t oss_buffer_size, oss_period_size, oss_periods;
 196         size_t min_period_size, max_period_size;
 197         struct snd_pcm_runtime *runtime = substream->runtime;
 198         size_t oss_frame_size;
 199
 200         oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
 201                          params_channels(oss_params) / 8;
 202
 203         oss_buffer_size = snd_pcm_plug_client_size(substream,
 204                                                    snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
 205         oss_buffer_size = 1 << ld2(oss_buffer_size);
 206         if (atomic_read(&runtime->mmap_count)) {
 207                 if (oss_buffer_size > runtime->oss.mmap_bytes)
 208                         oss_buffer_size = runtime->oss.mmap_bytes;
 209         }
 210
 211         if (substream->oss.setup.period_size > 16)
 212                 oss_period_size = substream->oss.setup.period_size;
 213         else if (runtime->oss.fragshift) {
 214                 oss_period_size = 1 << runtime->oss.fragshift;
 215                 if (oss_period_size > oss_buffer_size / 2)
 216                         oss_period_size = oss_buffer_size / 2;
 217         } else {
 218                 int sd;
 219                 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
 220
 221                 oss_period_size = oss_buffer_size;
 222                 do {
 223                         oss_period_size /= 2;
 224                 } while (oss_period_size > bytes_per_sec);
 225                 if (runtime->oss.subdivision == 0) {
 226                         sd = 4;
 227                         if (oss_period_size / sd > 4096)
 228                                 sd *= 2;
 229                         if (oss_period_size / sd < 4096)
 230                                 sd = 1;
 231                 } else
 232                         sd = runtime->oss.subdivision;
 233                 oss_period_size /= sd;
 234                 if (oss_period_size < 16)
 235                         oss_period_size = 16;
 236         }
 237
 238         min_period_size = snd_pcm_plug_client_size(substream,
 239                                                    snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
 240         min_period_size *= oss_frame_size;
 241         min_period_size = 1 << (ld2(min_period_size - 1) + 1);
 242         if (oss_period_size < min_period_size)
 243                 oss_period_size = min_period_size;
 244
 245         max_period_size = snd_pcm_plug_client_size(substream,
 246                                                    snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
 247         max_period_size *= oss_frame_size;
 248         max_period_size = 1 << ld2(max_period_size);
 249         if (oss_period_size > max_period_size)
 250                 oss_period_size = max_period_size;
 251
 252         oss_periods = oss_buffer_size / oss_period_size;
 253
 254         if (substream->oss.setup.periods > 1)
 255                 oss_periods = substream->oss.setup.periods;
 256
 257         s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
 258         if (runtime->oss.maxfrags && s > runtime->oss.maxfrags)
 259                 s = runtime->oss.maxfrags;
 260         if (oss_periods > s)
 261                 oss_periods = s;
 262
 263         s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
 264         if (s < 2)
 265                 s = 2;
 266         if (oss_periods < s)
 267                 oss_periods = s;
 268
 269         while (oss_period_size * oss_periods > oss_buffer_size)
 270                 oss_period_size /= 2;
 271
 272         snd_assert(oss_period_size >= 16, return -EINVAL);
 273         runtime->oss.period_bytes = oss_period_size;
 274         runtime->oss.period_frames = 1;
 275         runtime->oss.periods = oss_periods;
 276         return 0;
 277 }
 278
 279 static int choose_rate(struct snd_pcm_substream *substream,
 280                        struct snd_pcm_hw_params *params, unsigned int best_rate)
 281 {
 282         struct snd_interval *it;
 283         struct snd_pcm_hw_params *save;
 284         unsigned int rate, prev;
 285
 286         save = kmalloc(sizeof(*save), GFP_KERNEL);
 287         if (save == NULL)
 288                 return -ENOMEM;
 289         *save = *params;
 290         it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE);
 291
 292         /* try multiples of the best rate */
 293         rate = best_rate;
 294         for (;;) {
 295                 if (it->max < rate || (it->max == rate && it->openmax))
 296                         break;
 297                 if (it->min < rate || (it->min == rate && !it->openmin)) {
 298                         int ret;
 299                         ret = snd_pcm_hw_param_set(substream, params,
 300                                                    SNDRV_PCM_HW_PARAM_RATE,
 301                                                    rate, 0);
 302                         if (ret == (int)rate) {
 303                                 kfree(save);
 304                                 return rate;
 305                         }
 306                         *params = *save;
 307                 }
 308                 prev = rate;
 309                 rate += best_rate;
 310                 if (rate <= prev)
 311                         break;
 312         }
 313
 314         /* not found, use the nearest rate */
 315         kfree(save);
 316         return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
 317 }
 318
 319 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream)
 320 {
 321         struct snd_pcm_runtime *runtime = substream->runtime;
 322         struct snd_pcm_hw_params *params, *sparams;
 323         struct snd_pcm_sw_params *sw_params;
 324         ssize_t oss_buffer_size, oss_period_size;
 325         size_t oss_frame_size;
 326         int err;
 327         int direct;
 328         int format, sformat, n;
 329         struct snd_mask sformat_mask;
 330         struct snd_mask mask;
 331
 332         sw_params = kmalloc(sizeof(*sw_params), GFP_KERNEL);
 333         params = kmalloc(sizeof(*params), GFP_KERNEL);
 334         sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
 335         if (!sw_params || !params || !sparams) {
 336                 snd_printd("No memory\n");
 337                 err = -ENOMEM;
 338                 goto failure;
 339         }
 340
 341         if (atomic_read(&runtime->mmap_count))
 342                 direct = 1;
 343         else
 344                 direct = substream->oss.setup.direct;
 345
 346         _snd_pcm_hw_params_any(sparams);
 347         _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
 348         _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
 349         snd_mask_none(&mask);
 350         if (atomic_read(&runtime->mmap_count))
 351                 snd_mask_set(&mask, SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
 352         else {
 353                 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_INTERLEAVED);
 354                 if (!direct)
 355                         snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
 356         }
 357         err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
 358         if (err < 0) {
 359                 snd_printd("No usable accesses\n");
 360                 err = -EINVAL;
 361                 goto failure;
 362         }
 363         choose_rate(substream, sparams, runtime->oss.rate);
 364         snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
 365
 366         format = snd_pcm_oss_format_from(runtime->oss.format);
 367
 368         sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
 369         if (direct)
 370                 sformat = format;
 371         else
 372                 sformat = snd_pcm_plug_slave_format(format, &sformat_mask);
 373
 374         if (sformat < 0 || !snd_mask_test(&sformat_mask, sformat)) {
 375                 for (sformat = 0; sformat <= SNDRV_PCM_FORMAT_LAST; sformat++) {
 376                         if (snd_mask_test(&sformat_mask, sformat) &&
 377                             snd_pcm_oss_format_to(sformat) >= 0)
 378                                 break;
 379                 }
 380                 if (sformat > SNDRV_PCM_FORMAT_LAST) {
 381                         snd_printd("Cannot find a format!!!\n");
 382                         err = -EINVAL;
 383                         goto failure;
 384                 }
 385         }
 386         err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, sformat, 0);
 387         snd_assert(err >= 0, goto failure);
 388
 389         if (direct) {
 390                 memcpy(params, sparams, sizeof(*params));
 391         } else {
 392                 _snd_pcm_hw_params_any(params);
 393                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
 394                                       SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
 395                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
 396                                       snd_pcm_oss_format_from(runtime->oss.format), 0);
 397                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
 398                                       runtime->oss.channels, 0);
 399                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
 400                                       runtime->oss.rate, 0);
 401                 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
 402                          params_access(params), params_format(params),
 403                          params_channels(params), params_rate(params));
 404         }
 405         pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
 406                  params_access(sparams), params_format(sparams),
 407                  params_channels(sparams), params_rate(sparams));
 408
 409         oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
 410                          params_channels(params) / 8;
 411
 412 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
 413         snd_pcm_oss_plugin_clear(substream);
 414         if (!direct) {
 415                 /* add necessary plugins */
 416                 snd_pcm_oss_plugin_clear(substream);
 417                 if ((err = snd_pcm_plug_format_plugins(substream,
 418                                                        params,
 419                                                        sparams)) < 0) {
 420                         snd_printd("snd_pcm_plug_format_plugins failed: %i\n", err);
 421                         snd_pcm_oss_plugin_clear(substream);
 422                         goto failure;
 423                 }
 424                 if (runtime->oss.plugin_first) {
 425                         struct snd_pcm_plugin *plugin;
 426                         if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
 427                                 snd_printd("snd_pcm_plugin_build_io failed: %i\n", err);
 428                                 snd_pcm_oss_plugin_clear(substream);
 429                                 goto failure;
 430                         }
 431                         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 432                                 err = snd_pcm_plugin_append(plugin);
 433                         } else {
 434                                 err = snd_pcm_plugin_insert(plugin);
 435                         }
 436                         if (err < 0) {
 437                                 snd_pcm_oss_plugin_clear(substream);
 438                                 goto failure;
 439                         }
 440                 }
 441         }
 442 #endif
 443
 444         err = snd_pcm_oss_period_size(substream, params, sparams);
 445         if (err < 0)
 446                 goto failure;
 447
 448         n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
 449         err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
 450         snd_assert(err >= 0, goto failure);
 451
 452         err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
 453                                      runtime->oss.periods, NULL);
 454         snd_assert(err >= 0, goto failure);
 455
 456         snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
 457
 458         if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) {
 459                 snd_printd("HW_PARAMS failed: %i\n", err);
 460                 goto failure;
 461         }
 462
 463         memset(sw_params, 0, sizeof(*sw_params));
 464         if (runtime->oss.trigger) {
 465                 sw_params->start_threshold = 1;
 466         } else {
 467                 sw_params->start_threshold = runtime->boundary;
 468         }
 469         if (atomic_read(&runtime->mmap_count) || substream->stream == SNDRV_PCM_STREAM_CAPTURE)
 470                 sw_params->stop_threshold = runtime->boundary;
 471         else
 472                 sw_params->stop_threshold = runtime->buffer_size;
 473         sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
 474         sw_params->period_step = 1;
 475         sw_params->sleep_min = 0;
 476         sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
 477                 1 : runtime->period_size;
 478         sw_params->xfer_align = 1;
 479         if (atomic_read(&runtime->mmap_count) ||
 480             substream->oss.setup.nosilence) {
 481                 sw_params->silence_threshold = 0;
 482                 sw_params->silence_size = 0;
 483         } else {
 484                 snd_pcm_uframes_t frames;
 485                 frames = runtime->period_size + 16;
 486                 if (frames > runtime->buffer_size)
 487                         frames = runtime->buffer_size;
 488                 sw_params->silence_threshold = frames;
 489                 sw_params->silence_size = frames;
 490         }
 491
 492         if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
 493                 snd_printd("SW_PARAMS failed: %i\n", err);
 494                 goto failure;
 495         }
 496
 497         runtime->oss.periods = params_periods(sparams);
 498         oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
 499         snd_assert(oss_period_size >= 0, err = -EINVAL; goto failure);
 500 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
 501         if (runtime->oss.plugin_first) {
 502                 err = snd_pcm_plug_alloc(substream, oss_period_size);
 503                 if (err < 0)
 504                         goto failure;
 505         }
 506 #endif
 507         oss_period_size *= oss_frame_size;
 508
 509         oss_buffer_size = oss_period_size * runtime->oss.periods;
 510         snd_assert(oss_buffer_size >= 0, err = -EINVAL; goto failure);
 511
 512         runtime->oss.period_bytes = oss_period_size;
 513         runtime->oss.buffer_bytes = oss_buffer_size;
 514
 515         pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
 516                  runtime->oss.period_bytes,
 517                  runtime->oss.buffer_bytes);
 518         pdprintf("slave: period_size = %i, buffer_size = %i\n",
 519                  params_period_size(sparams),
 520                  params_buffer_size(sparams));
 521
 522         runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
 523         runtime->oss.channels = params_channels(params);
 524         runtime->oss.rate = params_rate(params);
 525
 526         runtime->oss.params = 0;
 527         runtime->oss.prepare = 1;
 528         vfree(runtime->oss.buffer);
 529         runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
 530         runtime->oss.buffer_used = 0;
 531         if (runtime->dma_area)
 532                 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
 533
 534         runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
 535
 536         err = 0;
 537 failure:
 538         kfree(sw_params);
 539         kfree(params);
 540         kfree(sparams);
 541         return err;
 542 }
 543
 544 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
 545 {
 546         int idx, err;
 547         struct snd_pcm_substream *asubstream = NULL, *substream;
 548
 549         for (idx = 0; idx < 2; idx++) {
 550                 substream = pcm_oss_file->streams[idx];
 551                 if (substream == NULL)
 552                         continue;
 553                 if (asubstream == NULL)
 554                         asubstream = substream;
 555                 if (substream->runtime->oss.params) {
 556                         err = snd_pcm_oss_change_params(substream);
 557                         if (err < 0)
 558                                 return err;
 559                 }
 560         }
 561         snd_assert(asubstream != NULL, return -EIO);
 562         if (r_substream)
 563                 *r_substream = asubstream;
 564         return 0;
 565 }
 566
 567 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
 568 {
 569         int err;
 570         struct snd_pcm_runtime *runtime = substream->runtime;
 571
 572         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
 573         if (err < 0) {
 574                 snd_printd("snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
 575                 return err;
 576         }
 577         runtime->oss.prepare = 0;
 578         runtime->oss.prev_hw_ptr_interrupt = 0;
 579         runtime->oss.period_ptr = 0;
 580         runtime->oss.buffer_used = 0;
 581
 582         return 0;
 583 }
 584
 585 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
 586 {
 587         struct snd_pcm_runtime *runtime;
 588         int err;
 589
 590         if (substream == NULL)
 591                 return 0;
 592         runtime = substream->runtime;
 593         if (runtime->oss.params) {
 594                 err = snd_pcm_oss_change_params(substream);
 595                 if (err < 0)
 596                         return err;
 597         }
 598         if (runtime->oss.prepare) {
 599                 err = snd_pcm_oss_prepare(substream);
 600                 if (err < 0)
 601                         return err;
 602         }
 603         return 0;
 604 }
 605
 606 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
 607 {
 608         struct snd_pcm_runtime *runtime;
 609         snd_pcm_uframes_t frames;
 610         int err = 0;
 611
 612         while (1) {
 613                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
 614                 if (err < 0)
 615                         break;
 616                 runtime = substream->runtime;
 617                 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
 618                         break;
 619                 /* in case of overrun, skip whole periods like OSS/Linux driver does */
 620                 /* until avail(delay) <= buffer_size */
 621                 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
 622                 frames /= runtime->period_size;
 623                 frames *= runtime->period_size;
 624                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
 625                 if (err < 0)
 626                         break;
 627         }
 628         return err;
 629 }
 630
 631 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
 632 {
 633         struct snd_pcm_runtime *runtime = substream->runtime;
 634         int ret;
 635         while (1) {
 636                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
 637                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
 638 #ifdef OSS_DEBUG
 639                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
 640                                 printk("pcm_oss: write: recovering from XRUN\n");
 641                         else
 642                                 printk("pcm_oss: write: recovering from SUSPEND\n");
 643 #endif
 644                         ret = snd_pcm_oss_prepare(substream);
 645                         if (ret < 0)
 646                                 break;
 647                 }
 648                 if (in_kernel) {
 649                         mm_segment_t fs;
 650                         fs = snd_enter_user();
 651                         ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
 652                         snd_leave_user(fs);
 653                 } else {
 654                         ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
 655                 }
 656                 if (ret != -EPIPE && ret != -ESTRPIPE)
 657                         break;
 658                 /* test, if we can't store new data, because the stream */
 659                 /* has not been started */
 660                 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
 661                         return -EAGAIN;
 662         }
 663         return ret;
 664 }
 665
 666 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
 667 {
 668         struct snd_pcm_runtime *runtime = substream->runtime;
 669         snd_pcm_sframes_t delay;
 670         int ret;
 671         while (1) {
 672                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
 673                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
 674 #ifdef OSS_DEBUG
 675                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
 676                                 printk("pcm_oss: read: recovering from XRUN\n");
 677                         else
 678                                 printk("pcm_oss: read: recovering from SUSPEND\n");
 679 #endif
 680                         ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
 681                         if (ret < 0)
 682                                 break;
 683                 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
 684                         ret = snd_pcm_oss_prepare(substream);
 685                         if (ret < 0)
 686                                 break;
 687                 }
 688                 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
 689                 if (ret < 0)
 690                         break;
 691                 if (in_kernel) {
 692                         mm_segment_t fs;
 693                         fs = snd_enter_user();
 694                         ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
 695                         snd_leave_user(fs);
 696                 } else {
 697                         ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
 698                 }
 699                 if (ret == -EPIPE) {
 700                         if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
 701                                 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
 702                                 if (ret < 0)
 703                                         break;
 704                         }
 705                         continue;
 706                 }
 707                 if (ret != -ESTRPIPE)
 708                         break;
 709         }
 710         return ret;
 711 }
 712
 713 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
 714 {
 715         struct snd_pcm_runtime *runtime = substream->runtime;
 716         int ret;
 717         while (1) {
 718                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
 719                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
 720 #ifdef OSS_DEBUG
 721                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
 722                                 printk("pcm_oss: writev: recovering from XRUN\n");
 723                         else
 724                                 printk("pcm_oss: writev: recovering from SUSPEND\n");
 725 #endif
 726                         ret = snd_pcm_oss_prepare(substream);
 727                         if (ret < 0)
 728                                 break;
 729                 }
 730                 if (in_kernel) {
 731                         mm_segment_t fs;
 732                         fs = snd_enter_user();
 733                         ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
 734                         snd_leave_user(fs);
 735                 } else {
 736                         ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
 737                 }
 738                 if (ret != -EPIPE && ret != -ESTRPIPE)
 739                         break;
 740
 741                 /* test, if we can't store new data, because the stream */
 742                 /* has not been started */
 743                 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
 744                         return -EAGAIN;
 745         }
 746         return ret;
 747 }
 748
 749 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
 750 {
 751         struct snd_pcm_runtime *runtime = substream->runtime;
 752         int ret;
 753         while (1) {
 754                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
 755                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
 756 #ifdef OSS_DEBUG
 757                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
 758                                 printk("pcm_oss: readv: recovering from XRUN\n");
 759                         else
 760                                 printk("pcm_oss: readv: recovering from SUSPEND\n");
 761 #endif
 762                         ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
 763                         if (ret < 0)
 764                                 break;
 765                 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
 766                         ret = snd_pcm_oss_prepare(substream);
 767                         if (ret < 0)
 768                                 break;
 769                 }
 770                 if (in_kernel) {
 771                         mm_segment_t fs;
 772                         fs = snd_enter_user();
 773                         ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
 774                         snd_leave_user(fs);
 775                 } else {
 776                         ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
 777                 }
 778                 if (ret != -EPIPE && ret != -ESTRPIPE)
 779                         break;
 780         }
 781         return ret;
 782 }
 783
 784 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
 785 {
 786         struct snd_pcm_runtime *runtime = substream->runtime;
 787         snd_pcm_sframes_t frames, frames1;
 788 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
 789         if (runtime->oss.plugin_first) {
 790                 struct snd_pcm_plugin_channel *channels;
 791                 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
 792                 if (!in_kernel) {
 793                         if (copy_from_user(runtime->oss.buffer, (const char __user *)buf, bytes))
 794                                 return -EFAULT;
 795                         buf = runtime->oss.buffer;
 796                 }
 797                 frames = bytes / oss_frame_bytes;
 798                 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
 799                 if (frames1 < 0)
 800                         return frames1;
 801                 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
 802                 if (frames1 <= 0)
 803                         return frames1;
 804                 bytes = frames1 * oss_frame_bytes;
 805         } else
 806 #endif
 807         {
 808                 frames = bytes_to_frames(runtime, bytes);
 809                 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
 810                 if (frames1 <= 0)
 811                         return frames1;
 812                 bytes = frames_to_bytes(runtime, frames1);
 813         }
 814         return bytes;
 815 }
 816
 817 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
 818 {
 819         size_t xfer = 0;
 820         ssize_t tmp;
 821         struct snd_pcm_runtime *runtime = substream->runtime;
 822
 823         if (atomic_read(&runtime->mmap_count))
 824                 return -ENXIO;
 825
 826         if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
 827                 return tmp;
 828         while (bytes > 0) {
 829                 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
 830                         tmp = bytes;
 831                         if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
 832                                 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
 833                         if (tmp > 0) {
 834                                 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp))
 835                                         return xfer > 0 ? (snd_pcm_sframes_t)xfer : -EFAULT;
 836                         }
 837                         runtime->oss.buffer_used += tmp;
 838                         buf += tmp;
 839                         bytes -= tmp;
 840                         xfer += tmp;
 841                         if (substream->oss.setup.partialfrag ||
 842                             runtime->oss.buffer_used == runtime->oss.period_bytes) {
 843                                 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
 844                                                          runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
 845                                 if (tmp <= 0)
 846                                         return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
 847                                 runtime->oss.bytes += tmp;
 848                                 runtime->oss.period_ptr += tmp;
 849                                 runtime->oss.period_ptr %= runtime->oss.period_bytes;
 850                                 if (runtime->oss.period_ptr == 0 ||
 851                                     runtime->oss.period_ptr == runtime->oss.buffer_used)
 852                                         runtime->oss.buffer_used = 0;
 853                                 else if ((substream->ffile->f_flags & O_NONBLOCK) != 0)
 854                                         return xfer > 0 ? xfer : -EAGAIN;
 855                         }
 856                 } else {
 857                         tmp = snd_pcm_oss_write2(substream,
 858                                                  (const char __force *)buf,
 859                                                  runtime->oss.period_bytes, 0);
 860                         if (tmp <= 0)
 861                                 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
 862                         runtime->oss.bytes += tmp;
 863                         buf += tmp;
 864                         bytes -= tmp;
 865                         xfer += tmp;
 866                         if ((substream->ffile->f_flags & O_NONBLOCK) != 0 &&
 867                             tmp != runtime->oss.period_bytes)
 868                                 break;
 869                 }
 870         }
 871         return xfer;
 872 }
 873
 874 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
 875 {
 876         struct snd_pcm_runtime *runtime = substream->runtime;
 877         snd_pcm_sframes_t frames, frames1;
 878 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
 879         char __user *final_dst = (char __user *)buf;
 880         if (runtime->oss.plugin_first) {
 881                 struct snd_pcm_plugin_channel *channels;
 882                 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
 883                 if (!in_kernel)
 884                         buf = runtime->oss.buffer;
 885                 frames = bytes / oss_frame_bytes;
 886                 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
 887                 if (frames1 < 0)
 888                         return frames1;
 889                 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
 890                 if (frames1 <= 0)
 891                         return frames1;
 892                 bytes = frames1 * oss_frame_bytes;
 893                 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
 894                         return -EFAULT;
 895         } else
 896 #endif
 897         {
 898                 frames = bytes_to_frames(runtime, bytes);
 899                 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
 900                 if (frames1 <= 0)
 901                         return frames1;
 902                 bytes = frames_to_bytes(runtime, frames1);
 903         }
 904         return bytes;
 905 }
 906
 907 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
 908 {
 909         size_t xfer = 0;
 910         ssize_t tmp;
 911         struct snd_pcm_runtime *runtime = substream->runtime;
 912
 913         if (atomic_read(&runtime->mmap_count))
 914                 return -ENXIO;
 915
 916         if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
 917                 return tmp;
 918         while (bytes > 0) {
 919                 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
 920                         if (runtime->oss.buffer_used == 0) {
 921                                 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
 922                                 if (tmp <= 0)
 923                                         return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
 924                                 runtime->oss.bytes += tmp;
 925                                 runtime->oss.period_ptr = tmp;
 926                                 runtime->oss.buffer_used = tmp;
 927                         }
 928                         tmp = bytes;
 929                         if ((size_t) tmp > runtime->oss.buffer_used)
 930                                 tmp = runtime->oss.buffer_used;
 931                         if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp))
 932                                 return xfer > 0 ? (snd_pcm_sframes_t)xfer : -EFAULT;
 933                         buf += tmp;
 934                         bytes -= tmp;
 935                         xfer += tmp;
 936                         runtime->oss.buffer_used -= tmp;
 937                 } else {
 938                         tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
 939                                                 runtime->oss.period_bytes, 0);
 940                         if (tmp <= 0)
 941                                 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
 942                         runtime->oss.bytes += tmp;
 943                         buf += tmp;
 944                         bytes -= tmp;
 945                         xfer += tmp;
 946                 }
 947         }
 948         return xfer;
 949 }
 950
 951 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
 952 {
 953         struct snd_pcm_substream *substream;
 954
 955         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
 956         if (substream != NULL) {
 957                 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
 958                 substream->runtime->oss.prepare = 1;
 959         }
 960         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
 961         if (substream != NULL) {
 962                 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
 963                 substream->runtime->oss.prepare = 1;
 964         }
 965         return 0;
 966 }
 967
 968 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
 969 {
 970         struct snd_pcm_substream *substream;
 971         int err;
 972
 973         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
 974         if (substream != NULL) {
 975                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
 976                         return err;
 977                 snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
 978         }
 979         /* note: all errors from the start action are ignored */
 980         /* OSS apps do not know, how to handle them */
 981         return 0;
 982 }
 983
 984 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
 985 {
 986         struct snd_pcm_runtime *runtime;
 987         ssize_t result = 0;
 988         long res;
 989         wait_queue_t wait;
 990
 991         runtime = substream->runtime;
 992         init_waitqueue_entry(&wait, current);
 993         add_wait_queue(&runtime->sleep, &wait);
 994 #ifdef OSS_DEBUG
 995         printk("sync1: size = %li\n", size);
 996 #endif
 997         while (1) {
 998                 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
 999                 if (result > 0) {
1000                         runtime->oss.buffer_used = 0;
1001                         result = 0;
1002                         break;
1003                 }
1004                 if (result != 0 && result != -EAGAIN)
1005                         break;
1006                 result = 0;
1007                 set_current_state(TASK_INTERRUPTIBLE);
1008                 snd_pcm_stream_lock_irq(substream);
1009                 res = runtime->status->state;
1010                 snd_pcm_stream_unlock_irq(substream);
1011                 if (res != SNDRV_PCM_STATE_RUNNING) {
1012                         set_current_state(TASK_RUNNING);
1013                         break;
1014                 }
1015                 res = schedule_timeout(10 * HZ);
1016                 if (signal_pending(current)) {
1017                         result = -ERESTARTSYS;
1018                         break;
1019                 }
1020                 if (res == 0) {
1021                         snd_printk(KERN_ERR "OSS sync error - DMA timeout\n");
1022                         result = -EIO;
1023                         break;
1024                 }
1025         }
1026         remove_wait_queue(&runtime->sleep, &wait);
1027         return result;
1028 }
1029
1030 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1031 {
1032         int err = 0;
1033         unsigned int saved_f_flags;
1034         struct snd_pcm_substream *substream;
1035         struct snd_pcm_runtime *runtime;
1036         snd_pcm_format_t format;
1037         unsigned long width;
1038         size_t size;
1039
1040         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1041         if (substream != NULL) {
1042                 runtime = substream->runtime;
1043                 if (atomic_read(&runtime->mmap_count))
1044                         goto __direct;
1045                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1046                         return err;
1047                 format = snd_pcm_oss_format_from(runtime->oss.format);
1048                 width = snd_pcm_format_physical_width(format);
1049                 if (runtime->oss.buffer_used > 0) {
1050 #ifdef OSS_DEBUG
1051                         printk("sync: buffer_used\n");
1052 #endif
1053                         size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1054                         snd_pcm_format_set_silence(format,
1055                                                    runtime->oss.buffer + runtime->oss.buffer_used,
1056                                                    size);
1057                         err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1058                         if (err < 0)
1059                                 return err;
1060                 } else if (runtime->oss.period_ptr > 0) {
1061 #ifdef OSS_DEBUG
1062                         printk("sync: period_ptr\n");
1063 #endif
1064                         size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1065                         snd_pcm_format_set_silence(format,
1066                                                    runtime->oss.buffer,
1067                                                    size * 8 / width);
1068                         err = snd_pcm_oss_sync1(substream, size);
1069                         if (err < 0)
1070                                 return err;
1071                 }
1072                 /*
1073                  * The ALSA's period might be a bit large than OSS one.
1074                  * Fill the remain portion of ALSA period with zeros.
1075                  */
1076                 size = runtime->control->appl_ptr % runtime->period_size;
1077                 if (size > 0) {
1078                         size = runtime->period_size - size;
1079                         if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
1080                                 size = (runtime->frame_bits * size) / 8;
1081                                 while (size > 0) {
1082                                         mm_segment_t fs;
1083                                         size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes;
1084                                         size -= size1;
1085                                         size1 *= 8;
1086                                         size1 /= runtime->sample_bits;
1087                                         snd_pcm_format_set_silence(runtime->format,
1088                                                                    runtime->oss.buffer,
1089                                                                    size1);
1090                                         fs = snd_enter_user();
1091                                         snd_pcm_lib_write(substream, (void __user *)runtime->oss.buffer, size1);
1092                                         snd_leave_user(fs);
1093                                 }
1094                         } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
1095                                 void __user *buffers[runtime->channels];
1096                                 memset(buffers, 0, runtime->channels * sizeof(void *));
1097                                 snd_pcm_lib_writev(substream, buffers, size);
1098                         }
1099                 }
1100                 /*
1101                  * finish sync: drain the buffer
1102                  */
1103               __direct:
1104                 saved_f_flags = substream->ffile->f_flags;
1105                 substream->ffile->f_flags &= ~O_NONBLOCK;
1106                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1107                 substream->ffile->f_flags = saved_f_flags;
1108                 if (err < 0)
1109                         return err;
1110                 runtime->oss.prepare = 1;
1111         }
1112
1113         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1114         if (substream != NULL) {
1115                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1116                         return err;
1117                 runtime = substream->runtime;
1118                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1119                 if (err < 0)
1120                         return err;
1121                 runtime->oss.buffer_used = 0;
1122                 runtime->oss.prepare = 1;
1123         }
1124         return 0;
1125 }
1126
1127 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1128 {
1129         int idx;
1130
1131         for (idx = 1; idx >= 0; --idx) {
1132                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1133                 struct snd_pcm_runtime *runtime;
1134                 if (substream == NULL)
1135                         continue;
1136                 runtime = substream->runtime;
1137                 if (rate < 1000)
1138                         rate = 1000;
1139                 else if (rate > 192000)
1140                         rate = 192000;
1141                 if (runtime->oss.rate != rate) {
1142                         runtime->oss.params = 1;
1143                         runtime->oss.rate = rate;
1144                 }
1145         }
1146         return snd_pcm_oss_get_rate(pcm_oss_file);
1147 }
1148
1149 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1150 {
1151         struct snd_pcm_substream *substream;
1152         int err;
1153
1154         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1155                 return err;
1156         return substream->runtime->oss.rate;
1157 }
1158
1159 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1160 {
1161         int idx;
1162         if (channels < 1)
1163                 channels = 1;
1164         if (channels > 128)
1165                 return -EINVAL;
1166         for (idx = 1; idx >= 0; --idx) {
1167                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1168                 struct snd_pcm_runtime *runtime;
1169                 if (substream == NULL)
1170                         continue;
1171                 runtime = substream->runtime;
1172                 if (runtime->oss.channels != channels) {
1173                         runtime->oss.params = 1;
1174                         runtime->oss.channels = channels;
1175                 }
1176         }
1177         return snd_pcm_oss_get_channels(pcm_oss_file);
1178 }
1179
1180 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1181 {
1182         struct snd_pcm_substream *substream;
1183         int err;
1184
1185         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1186                 return err;
1187         return substream->runtime->oss.channels;
1188 }
1189
1190 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1191 {
1192         struct snd_pcm_substream *substream;
1193         int err;
1194
1195         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1196                 return err;
1197         return substream->runtime->oss.period_bytes;
1198 }
1199
1200 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1201 {
1202         struct snd_pcm_substream *substream;
1203         int err;
1204         int direct;
1205         struct snd_pcm_hw_params *params;
1206         unsigned int formats = 0;
1207         struct snd_mask format_mask;
1208         int fmt;
1209
1210         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1211                 return err;
1212         if (atomic_read(&substream->runtime->mmap_count))
1213                 direct = 1;
1214         else
1215                 direct = substream->oss.setup.direct;
1216         if (!direct)
1217                 return AFMT_MU_LAW | AFMT_U8 |
1218                        AFMT_S16_LE | AFMT_S16_BE |
1219                        AFMT_S8 | AFMT_U16_LE |
1220                        AFMT_U16_BE;
1221         params = kmalloc(sizeof(*params), GFP_KERNEL);
1222         if (!params)
1223                 return -ENOMEM;
1224         _snd_pcm_hw_params_any(params);
1225         err = snd_pcm_hw_refine(substream, params);
1226         format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1227         kfree(params);
1228         snd_assert(err >= 0, return err);
1229         for (fmt = 0; fmt < 32; ++fmt) {
1230                 if (snd_mask_test(&format_mask, fmt)) {
1231                         int f = snd_pcm_oss_format_to(fmt);
1232                         if (f >= 0)
1233                                 formats |= f;
1234                 }
1235         }
1236         return formats;
1237 }
1238
1239 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1240 {
1241         int formats, idx;
1242
1243         if (format != AFMT_QUERY) {
1244                 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1245                 if (formats < 0)
1246                         return formats;
1247                 if (!(formats & format))
1248                         format = AFMT_U8;
1249                 for (idx = 1; idx >= 0; --idx) {
1250                         struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1251                         struct snd_pcm_runtime *runtime;
1252                         if (substream == NULL)
1253                                 continue;
1254                         runtime = substream->runtime;
1255                         if (runtime->oss.format != format) {
1256                                 runtime->oss.params = 1;
1257                                 runtime->oss.format = format;
1258                         }
1259                 }
1260         }
1261         return snd_pcm_oss_get_format(pcm_oss_file);
1262 }
1263
1264 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1265 {
1266         struct snd_pcm_substream *substream;
1267         int err;
1268
1269         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1270                 return err;
1271         return substream->runtime->oss.format;
1272 }
1273
1274 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1275 {
1276         struct snd_pcm_runtime *runtime;
1277
1278         if (substream == NULL)
1279                 return 0;
1280         runtime = substream->runtime;
1281         if (subdivide == 0) {
1282                 subdivide = runtime->oss.subdivision;
1283                 if (subdivide == 0)
1284                         subdivide = 1;
1285                 return subdivide;
1286         }
1287         if (runtime->oss.subdivision || runtime->oss.fragshift)
1288                 return -EINVAL;
1289         if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1290             subdivide != 8 && subdivide != 16)
1291                 return -EINVAL;
1292         runtime->oss.subdivision = subdivide;
1293         runtime->oss.params = 1;
1294         return subdivide;
1295 }
1296
1297 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1298 {
1299         int err = -EINVAL, idx;
1300
1301         for (idx = 1; idx >= 0; --idx) {
1302                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1303                 if (substream == NULL)
1304                         continue;
1305                 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1306                         return err;
1307         }
1308         return err;
1309 }
1310
1311 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1312 {
1313         struct snd_pcm_runtime *runtime;
1314
1315         if (substream == NULL)
1316                 return 0;
1317         runtime = substream->runtime;
1318         if (runtime->oss.subdivision || runtime->oss.fragshift)
1319                 return -EINVAL;
1320         runtime->oss.fragshift = val & 0xffff;
1321         runtime->oss.maxfrags = (val >> 16) & 0xffff;
1322         if (runtime->oss.fragshift < 4)         /* < 16 */
1323                 runtime->oss.fragshift = 4;
1324         if (runtime->oss.maxfrags < 2)
1325                 runtime->oss.maxfrags = 2;
1326         runtime->oss.params = 1;
1327         return 0;
1328 }
1329
1330 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1331 {
1332         int err = -EINVAL, idx;
1333
1334         for (idx = 1; idx >= 0; --idx) {
1335                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1336                 if (substream == NULL)
1337                         continue;
1338                 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1339                         return err;
1340         }
1341         return err;
1342 }
1343
1344 static int snd_pcm_oss_nonblock(struct file * file)
1345 {
1346         file->f_flags |= O_NONBLOCK;
1347         return 0;
1348 }
1349
1350 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1351 {
1352
1353         if (substream == NULL) {
1354                 res &= ~DSP_CAP_DUPLEX;
1355                 return res;
1356         }
1357 #ifdef DSP_CAP_MULTI
1358         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1359                 if (substream->pstr->substream_count > 1)
1360                         res |= DSP_CAP_MULTI;
1361 #endif
1362         /* DSP_CAP_REALTIME is set all times: */
1363         /* all ALSA drivers can return actual pointer in ring buffer */
1364 #if defined(DSP_CAP_REALTIME) && 0
1365         {
1366                 struct snd_pcm_runtime *runtime = substream->runtime;
1367                 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1368                         res &= ~DSP_CAP_REALTIME;
1369         }
1370 #endif
1371         return res;
1372 }
1373
1374 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
1375 {
1376         int result, idx;
1377
1378         result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1379         for (idx = 0; idx < 2; idx++) {
1380                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1381                 result = snd_pcm_oss_get_caps1(substream, result);
1382         }
1383         result |= 0x0001;       /* revision - same as SB AWE 64 */
1384         return result;
1385 }
1386
1387 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream, snd_pcm_uframes_t hw_ptr)
1388 {
1389         struct snd_pcm_runtime *runtime = substream->runtime;
1390         snd_pcm_uframes_t appl_ptr;
1391         appl_ptr = hw_ptr + runtime->buffer_size;
1392         appl_ptr %= runtime->boundary;
1393         runtime->control->appl_ptr = appl_ptr;
1394 }
1395
1396 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
1397 {
1398         struct snd_pcm_runtime *runtime;
1399         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1400         int err, cmd;
1401
1402 #ifdef OSS_DEBUG
1403         printk("pcm_oss: trigger = 0x%x\n", trigger);
1404 #endif
1405
1406         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1407         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1408
1409         if (psubstream) {
1410                 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1411                         return err;
1412         }
1413         if (csubstream) {
1414                 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1415                         return err;
1416         }
1417         if (psubstream) {
1418                 runtime = psubstream->runtime;
1419                 if (trigger & PCM_ENABLE_OUTPUT) {
1420                         if (runtime->oss.trigger)
1421                                 goto _skip1;
1422                         if (atomic_read(&psubstream->runtime->mmap_count))
1423                                 snd_pcm_oss_simulate_fill(psubstream, runtime->hw_ptr_interrupt);
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 _skip1;
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_ioctl(psubstream, cmd, NULL);
1436                 if (err < 0)
1437                         return err;
1438         }
1439  _skip1:
1440         if (csubstream) {
1441                 runtime = csubstream->runtime;
1442                 if (trigger & PCM_ENABLE_INPUT) {
1443                         if (runtime->oss.trigger)
1444                                 goto _skip2;
1445                         runtime->oss.trigger = 1;
1446                         runtime->start_threshold = 1;
1447                         cmd = SNDRV_PCM_IOCTL_START;
1448                 } else {
1449                         if (!runtime->oss.trigger)
1450                                 goto _skip2;
1451                         runtime->oss.trigger = 0;
1452                         runtime->start_threshold = runtime->boundary;
1453                         cmd = SNDRV_PCM_IOCTL_DROP;
1454                         runtime->oss.prepare = 1;
1455                 }
1456                 err = snd_pcm_kernel_ioctl(csubstream, cmd, NULL);
1457                 if (err < 0)
1458                         return err;
1459         }
1460  _skip2:
1461         return 0;
1462 }
1463
1464 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
1465 {
1466         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1467         int result = 0;
1468
1469         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1470         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1471         if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
1472                 result |= PCM_ENABLE_OUTPUT;
1473         if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
1474                 result |= PCM_ENABLE_INPUT;
1475         return result;
1476 }
1477
1478 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
1479 {
1480         struct snd_pcm_substream *substream;
1481         struct snd_pcm_runtime *runtime;
1482         snd_pcm_sframes_t delay;
1483         int err;
1484
1485         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1486         if (substream == NULL)
1487                 return -EINVAL;
1488         if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1489                 return err;
1490         runtime = substream->runtime;
1491         if (runtime->oss.params || runtime->oss.prepare)
1492                 return 0;
1493         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
1494         if (err == -EPIPE)
1495                 delay = 0;      /* hack for broken OSS applications */
1496         else if (err < 0)
1497                 return err;
1498         return snd_pcm_oss_bytes(substream, delay);
1499 }
1500
1501 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
1502 {
1503         struct snd_pcm_substream *substream;
1504         struct snd_pcm_runtime *runtime;
1505         snd_pcm_sframes_t delay;
1506         int fixup;
1507         struct count_info info;
1508         int err;
1509
1510         if (_info == NULL)
1511                 return -EFAULT;
1512         substream = pcm_oss_file->streams[stream];
1513         if (substream == NULL)
1514                 return -EINVAL;
1515         if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1516                 return err;
1517         runtime = substream->runtime;
1518         if (runtime->oss.params || runtime->oss.prepare) {
1519                 memset(&info, 0, sizeof(info));
1520                 if (copy_to_user(_info, &info, sizeof(info)))
1521                         return -EFAULT;
1522                 return 0;
1523         }
1524         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1525                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
1526                 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
1527                         err = 0;
1528                         delay = 0;
1529                         fixup = 0;
1530                 } else {
1531                         fixup = runtime->oss.buffer_used;
1532                 }
1533         } else {
1534                 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
1535                 fixup = -runtime->oss.buffer_used;
1536         }
1537         if (err < 0)
1538                 return err;
1539         info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
1540         if (atomic_read(&runtime->mmap_count)) {
1541                 snd_pcm_sframes_t n;
1542                 n = (delay = runtime->hw_ptr_interrupt) - runtime->oss.prev_hw_ptr_interrupt;
1543                 if (n < 0)
1544                         n += runtime->boundary;
1545                 info.blocks = n / runtime->period_size;
1546                 runtime->oss.prev_hw_ptr_interrupt = delay;
1547                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1548                         snd_pcm_oss_simulate_fill(substream, delay);
1549                 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
1550         } else {
1551                 delay = snd_pcm_oss_bytes(substream, delay);
1552                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1553                         if (substream->oss.setup.buggyptr)
1554                                 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
1555                         else
1556                                 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
1557                         info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
1558                 } else {
1559                         delay += fixup;
1560                         info.blocks = delay / runtime->oss.period_bytes;
1561                         info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
1562                 }
1563         }
1564         if (copy_to_user(_info, &info, sizeof(info)))
1565                 return -EFAULT;
1566         return 0;
1567 }
1568
1569 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
1570 {
1571         struct snd_pcm_substream *substream;
1572         struct snd_pcm_runtime *runtime;
1573         snd_pcm_sframes_t avail;
1574         int fixup;
1575         struct audio_buf_info info;
1576         int err;
1577
1578         if (_info == NULL)
1579                 return -EFAULT;
1580         substream = pcm_oss_file->streams[stream];
1581         if (substream == NULL)
1582                 return -EINVAL;
1583         runtime = substream->runtime;
1584
1585         if (runtime->oss.params &&
1586             (err = snd_pcm_oss_change_params(substream)) < 0)
1587                 return err;
1588
1589         info.fragsize = runtime->oss.period_bytes;
1590         info.fragstotal = runtime->periods;
1591         if (runtime->oss.prepare) {
1592                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1593                         info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
1594                         info.fragments = runtime->oss.periods;
1595                 } else {
1596                         info.bytes = 0;
1597                         info.fragments = 0;
1598                 }
1599         } else {
1600                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1601                         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
1602                         if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
1603                                 avail = runtime->buffer_size;
1604                                 err = 0;
1605                                 fixup = 0;
1606                         } else {
1607                                 avail = runtime->buffer_size - avail;
1608                                 fixup = -runtime->oss.buffer_used;
1609                         }
1610                 } else {
1611                         err = snd_pcm_oss_capture_position_fixup(substream, &avail);
1612                         fixup = runtime->oss.buffer_used;
1613                 }
1614                 if (err < 0)
1615                         return err;
1616                 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
1617                 info.fragments = info.bytes / runtime->oss.period_bytes;
1618         }
1619
1620 #ifdef OSS_DEBUG
1621         printk("pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n", info.bytes, info.fragments, info.fragstotal, info.fragsize);
1622 #endif
1623         if (copy_to_user(_info, &info, sizeof(info)))
1624                 return -EFAULT;
1625         return 0;
1626 }
1627
1628 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
1629 {
1630         // it won't be probably implemented
1631         // snd_printd("TODO: snd_pcm_oss_get_mapbuf\n");
1632         return -EINVAL;
1633 }
1634
1635 static const char *strip_task_path(const char *path)
1636 {
1637         const char *ptr, *ptrl = NULL;
1638         for (ptr = path; *ptr; ptr++) {
1639                 if (*ptr == '/')
1640                         ptrl = ptr + 1;
1641         }
1642         return ptrl;
1643 }
1644
1645 static void snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream,
1646                                       const char *task_name,
1647                                       struct snd_pcm_oss_setup *rsetup)
1648 {
1649         struct snd_pcm_oss_setup *setup;
1650
1651         mutex_lock(&pcm->streams[stream].oss.setup_mutex);
1652         do {
1653                 for (setup = pcm->streams[stream].oss.setup_list; setup;
1654                      setup = setup->next) {
1655                         if (!strcmp(setup->task_name, task_name))
1656                                 goto out;
1657                 }
1658         } while ((task_name = strip_task_path(task_name)) != NULL);
1659  out:
1660         if (setup)
1661                 *rsetup = *setup;
1662         mutex_unlock(&pcm->streams[stream].oss.setup_mutex);
1663 }
1664
1665 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
1666 {
1667         struct snd_pcm_runtime *runtime;
1668         runtime = substream->runtime;
1669         vfree(runtime->oss.buffer);
1670         runtime->oss.buffer = NULL;
1671 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
1672         snd_pcm_oss_plugin_clear(substream);
1673 #endif
1674         substream->oss.oss = 0;
1675 }
1676
1677 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
1678                                        struct snd_pcm_oss_setup *setup,
1679                                        int minor)
1680 {
1681         struct snd_pcm_runtime *runtime;
1682
1683         substream->oss.oss = 1;
1684         substream->oss.setup = *setup;
1685         if (setup->nonblock)
1686                 substream->ffile->f_flags |= O_NONBLOCK;
1687         else if (setup->block)
1688                 substream->ffile->f_flags &= ~O_NONBLOCK;
1689         runtime = substream->runtime;
1690         runtime->oss.params = 1;
1691         runtime->oss.trigger = 1;
1692         runtime->oss.rate = 8000;
1693         switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
1694         case SNDRV_MINOR_OSS_PCM_8:
1695                 runtime->oss.format = AFMT_U8;
1696                 break;
1697         case SNDRV_MINOR_OSS_PCM_16:
1698                 runtime->oss.format = AFMT_S16_LE;
1699                 break;
1700         default:
1701                 runtime->oss.format = AFMT_MU_LAW;
1702         }
1703         runtime->oss.channels = 1;
1704         runtime->oss.fragshift = 0;
1705         runtime->oss.maxfrags = 0;
1706         runtime->oss.subdivision = 0;
1707         substream->pcm_release = snd_pcm_oss_release_substream;
1708 }
1709
1710 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
1711 {
1712         int cidx;
1713         snd_assert(pcm_oss_file != NULL, return -ENXIO);
1714         for (cidx = 0; cidx < 2; ++cidx) {
1715                 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
1716                 if (substream)
1717                         snd_pcm_release_substream(substream);
1718         }
1719         kfree(pcm_oss_file);
1720         return 0;
1721 }
1722
1723 static int snd_pcm_oss_open_file(struct file *file,
1724                                  struct snd_pcm *pcm,
1725                                  struct snd_pcm_oss_file **rpcm_oss_file,
1726                                  int minor,
1727                                  struct snd_pcm_oss_setup *setup)
1728 {
1729         int idx, err;
1730         struct snd_pcm_oss_file *pcm_oss_file;
1731         struct snd_pcm_substream *substream;
1732         unsigned int f_mode = file->f_mode;
1733
1734         snd_assert(rpcm_oss_file != NULL, return -EINVAL);
1735         *rpcm_oss_file = NULL;
1736
1737         pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
1738         if (pcm_oss_file == NULL)
1739                 return -ENOMEM;
1740
1741         if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
1742             (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
1743                 f_mode = FMODE_WRITE;
1744
1745         for (idx = 0; idx < 2; idx++) {
1746                 if (setup[idx].disable)
1747                         continue;
1748                 if (! pcm->streams[idx].substream_count)
1749                         continue; /* no matching substream */
1750                 if (idx == SNDRV_PCM_STREAM_PLAYBACK) {
1751                         if (! (f_mode & FMODE_WRITE))
1752                                 continue;
1753                 } else {
1754                         if (! (f_mode & FMODE_READ))
1755                                 continue;
1756                 }
1757                 err = snd_pcm_open_substream(pcm, idx, file, &substream);
1758                 if (err < 0) {
1759                         snd_pcm_oss_release_file(pcm_oss_file);
1760                         return err;
1761                 }
1762
1763                 pcm_oss_file->streams[idx] = substream;
1764                 substream->file = pcm_oss_file;
1765                 snd_pcm_oss_init_substream(substream, &setup[idx], minor);
1766         }
1767
1768         if (!pcm_oss_file->streams[0] && !pcm_oss_file->streams[1]) {
1769                 snd_pcm_oss_release_file(pcm_oss_file);
1770                 return -EINVAL;
1771         }
1772
1773         file->private_data = pcm_oss_file;
1774         *rpcm_oss_file = pcm_oss_file;
1775         return 0;
1776 }
1777
1778
1779 static int snd_task_name(struct task_struct *task, char *name, size_t size)
1780 {
1781         unsigned int idx;
1782
1783         snd_assert(task != NULL && name != NULL && size >= 2, return -EINVAL);
1784         for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
1785                 name[idx] = task->comm[idx];
1786         name[idx] = '\0';
1787         return 0;
1788 }
1789
1790 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
1791 {
1792         int err;
1793         char task_name[32];
1794         struct snd_pcm *pcm;
1795         struct snd_pcm_oss_file *pcm_oss_file;
1796         struct snd_pcm_oss_setup setup[2];
1797         int nonblock;
1798         wait_queue_t wait;
1799         static char printed_comm[16];
1800
1801         if (strncmp(printed_comm, current->comm, 16)) {
1802                 printk(KERN_DEBUG "application %s uses obsolete OSS audio interface\n",
1803                        current->comm);
1804                 memcpy(printed_comm, current->comm, 16);
1805         }
1806
1807         pcm = snd_lookup_oss_minor_data(iminor(inode),
1808                                         SNDRV_OSS_DEVICE_TYPE_PCM);
1809         if (pcm == NULL) {
1810                 err = -ENODEV;
1811                 goto __error1;
1812         }
1813         err = snd_card_file_add(pcm->card, file);
1814         if (err < 0)
1815                 goto __error1;
1816         if (!try_module_get(pcm->card->module)) {
1817                 err = -EFAULT;
1818                 goto __error2;
1819         }
1820         if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
1821                 err = -EFAULT;
1822                 goto __error;
1823         }
1824         memset(setup, 0, sizeof(setup));
1825         if (file->f_mode & FMODE_WRITE)
1826                 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK,
1827                                            task_name, &setup[0]);
1828         if (file->f_mode & FMODE_READ)
1829                 snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE,
1830                                            task_name, &setup[1]);
1831
1832         nonblock = !!(file->f_flags & O_NONBLOCK);
1833         if (!nonblock)
1834                 nonblock = nonblock_open;
1835
1836         init_waitqueue_entry(&wait, current);
1837         add_wait_queue(&pcm->open_wait, &wait);
1838         mutex_lock(&pcm->open_mutex);
1839         while (1) {
1840                 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
1841                                             iminor(inode), setup);
1842                 if (err >= 0)
1843                         break;
1844                 if (err == -EAGAIN) {
1845                         if (nonblock) {
1846                                 err = -EBUSY;
1847                                 break;
1848                         }
1849                 } else
1850                         break;
1851                 set_current_state(TASK_INTERRUPTIBLE);
1852                 mutex_unlock(&pcm->open_mutex);
1853                 schedule();
1854                 mutex_lock(&pcm->open_mutex);
1855                 if (signal_pending(current)) {
1856                         err = -ERESTARTSYS;
1857                         break;
1858                 }
1859         }
1860         remove_wait_queue(&pcm->open_wait, &wait);
1861         mutex_unlock(&pcm->open_mutex);
1862         if (err < 0)
1863                 goto __error;
1864         return err;
1865
1866       __error:
1867         module_put(pcm->card->module);
1868       __error2:
1869         snd_card_file_remove(pcm->card, file);
1870       __error1:
1871         return err;
1872 }
1873
1874 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
1875 {
1876         struct snd_pcm *pcm;
1877         struct snd_pcm_substream *substream;
1878         struct snd_pcm_oss_file *pcm_oss_file;
1879
1880         pcm_oss_file = file->private_data;
1881         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1882         if (substream == NULL)
1883                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1884         snd_assert(substream != NULL, return -ENXIO);
1885         pcm = substream->pcm;
1886         snd_pcm_oss_sync(pcm_oss_file);
1887         mutex_lock(&pcm->open_mutex);
1888         snd_pcm_oss_release_file(pcm_oss_file);
1889         mutex_unlock(&pcm->open_mutex);
1890         wake_up(&pcm->open_wait);
1891         module_put(pcm->card->module);
1892         snd_card_file_remove(pcm->card, file);
1893         return 0;
1894 }
1895
1896 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1897 {
1898         struct snd_pcm_oss_file *pcm_oss_file;
1899         int __user *p = (int __user *)arg;
1900         int res;
1901
1902         pcm_oss_file = file->private_data;
1903         if (cmd == OSS_GETVERSION)
1904                 return put_user(SNDRV_OSS_VERSION, p);
1905         if (cmd == OSS_ALSAEMULVER)
1906                 return put_user(1, p);
1907 #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE))
1908         if (((cmd >> 8) & 0xff) == 'M') {       /* mixer ioctl - for OSS compatibility */
1909                 struct snd_pcm_substream *substream;
1910                 int idx;
1911                 for (idx = 0; idx < 2; ++idx) {
1912                         substream = pcm_oss_file->streams[idx];
1913                         if (substream != NULL)
1914                                 break;
1915                 }
1916                 snd_assert(substream != NULL, return -ENXIO);
1917                 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
1918         }
1919 #endif
1920         if (((cmd >> 8) & 0xff) != 'P')
1921                 return -EINVAL;
1922 #ifdef OSS_DEBUG
1923         printk("pcm_oss: ioctl = 0x%x\n", cmd);
1924 #endif
1925         switch (cmd) {
1926         case SNDCTL_DSP_RESET:
1927                 return snd_pcm_oss_reset(pcm_oss_file);
1928         case SNDCTL_DSP_SYNC:
1929                 return snd_pcm_oss_sync(pcm_oss_file);
1930         case SNDCTL_DSP_SPEED:
1931                 if (get_user(res, p))
1932                         return -EFAULT;
1933                 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
1934                         return res;
1935                 return put_user(res, p);
1936         case SOUND_PCM_READ_RATE:
1937                 res = snd_pcm_oss_get_rate(pcm_oss_file);
1938                 if (res < 0)
1939                         return res;
1940                 return put_user(res, p);
1941         case SNDCTL_DSP_STEREO:
1942                 if (get_user(res, p))
1943                         return -EFAULT;
1944                 res = res > 0 ? 2 : 1;
1945                 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
1946                         return res;
1947                 return put_user(--res, p);
1948         case SNDCTL_DSP_GETBLKSIZE:
1949                 res = snd_pcm_oss_get_block_size(pcm_oss_file);
1950                 if (res < 0)
1951                         return res;
1952                 return put_user(res, p);
1953         case SNDCTL_DSP_SETFMT:
1954                 if (get_user(res, p))
1955                         return -EFAULT;
1956                 res = snd_pcm_oss_set_format(pcm_oss_file, res);
1957                 if (res < 0)
1958                         return res;
1959                 return put_user(res, p);
1960         case SOUND_PCM_READ_BITS:
1961                 res = snd_pcm_oss_get_format(pcm_oss_file);
1962                 if (res < 0)
1963                         return res;
1964                 return put_user(res, p);
1965         case SNDCTL_DSP_CHANNELS:
1966                 if (get_user(res, p))
1967                         return -EFAULT;
1968                 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
1969                 if (res < 0)
1970                         return res;
1971                 return put_user(res, p);
1972         case SOUND_PCM_READ_CHANNELS:
1973                 res = snd_pcm_oss_get_channels(pcm_oss_file);
1974                 if (res < 0)
1975                         return res;
1976                 return put_user(res, p);
1977         case SOUND_PCM_WRITE_FILTER:
1978         case SOUND_PCM_READ_FILTER:
1979                 return -EIO;
1980         case SNDCTL_DSP_POST:
1981                 return snd_pcm_oss_post(pcm_oss_file);
1982         case SNDCTL_DSP_SUBDIVIDE:
1983                 if (get_user(res, p))
1984                         return -EFAULT;
1985                 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
1986                 if (res < 0)
1987                         return res;
1988                 return put_user(res, p);
1989         case SNDCTL_DSP_SETFRAGMENT:
1990                 if (get_user(res, p))
1991                         return -EFAULT;
1992                 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
1993         case SNDCTL_DSP_GETFMTS:
1994                 res = snd_pcm_oss_get_formats(pcm_oss_file);
1995                 if (res < 0)
1996                         return res;
1997                 return put_user(res, p);
1998         case SNDCTL_DSP_GETOSPACE:
1999         case SNDCTL_DSP_GETISPACE:
2000                 return snd_pcm_oss_get_space(pcm_oss_file,
2001                         cmd == SNDCTL_DSP_GETISPACE ?
2002                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2003                         (struct audio_buf_info __user *) arg);
2004         case SNDCTL_DSP_NONBLOCK:
2005                 return snd_pcm_oss_nonblock(file);
2006         case SNDCTL_DSP_GETCAPS:
2007                 res = snd_pcm_oss_get_caps(pcm_oss_file);
2008                 if (res < 0)
2009                         return res;
2010                 return put_user(res, p);
2011         case SNDCTL_DSP_GETTRIGGER:
2012                 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2013                 if (res < 0)
2014                         return res;
2015                 return put_user(res, p);
2016         case SNDCTL_DSP_SETTRIGGER:
2017                 if (get_user(res, p))
2018                         return -EFAULT;
2019                 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2020         case SNDCTL_DSP_GETIPTR:
2021         case SNDCTL_DSP_GETOPTR:
2022                 return snd_pcm_oss_get_ptr(pcm_oss_file,
2023                         cmd == SNDCTL_DSP_GETIPTR ?
2024                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2025                         (struct count_info __user *) arg);
2026         case SNDCTL_DSP_MAPINBUF:
2027         case SNDCTL_DSP_MAPOUTBUF:
2028                 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2029                         cmd == SNDCTL_DSP_MAPINBUF ?
2030                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2031                         (struct buffmem_desc __user *) arg);
2032         case SNDCTL_DSP_SETSYNCRO:
2033                 /* stop DMA now.. */
2034                 return 0;
2035         case SNDCTL_DSP_SETDUPLEX:
2036                 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2037                         return 0;
2038                 return -EIO;
2039         case SNDCTL_DSP_GETODELAY:
2040                 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2041                 if (res < 0) {
2042                         /* it's for sure, some broken apps don't check for error codes */
2043                         put_user(0, p);
2044                         return res;
2045                 }
2046                 return put_user(res, p);
2047         case SNDCTL_DSP_PROFILE:
2048                 return 0;       /* silently ignore */
2049         default:
2050                 snd_printd("pcm_oss: unknown command = 0x%x\n", cmd);
2051         }
2052         return -EINVAL;
2053 }
2054
2055 #ifdef CONFIG_COMPAT
2056 /* all compatible */
2057 #define snd_pcm_oss_ioctl_compat        snd_pcm_oss_ioctl
2058 #else
2059 #define snd_pcm_oss_ioctl_compat        NULL
2060 #endif
2061
2062 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2063 {
2064         struct snd_pcm_oss_file *pcm_oss_file;
2065         struct snd_pcm_substream *substream;
2066
2067         pcm_oss_file = file->private_data;
2068         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2069         if (substream == NULL)
2070                 return -ENXIO;
2071 #ifndef OSS_DEBUG
2072         return snd_pcm_oss_read1(substream, buf, count);
2073 #else
2074         {
2075                 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2076                 printk("pcm_oss: read %li bytes (returned %li bytes)\n", (long)count, (long)res);
2077                 return res;
2078         }
2079 #endif
2080 }
2081
2082 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2083 {
2084         struct snd_pcm_oss_file *pcm_oss_file;
2085         struct snd_pcm_substream *substream;
2086         long result;
2087
2088         pcm_oss_file = file->private_data;
2089         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2090         if (substream == NULL)
2091                 return -ENXIO;
2092         result = snd_pcm_oss_write1(substream, buf, count);
2093 #ifdef OSS_DEBUG
2094         printk("pcm_oss: write %li bytes (wrote %li bytes)\n", (long)count, (long)result);
2095 #endif
2096         return result;
2097 }
2098
2099 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2100 {
2101         struct snd_pcm_runtime *runtime = substream->runtime;
2102         if (atomic_read(&runtime->mmap_count))
2103                 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2104         else
2105                 return snd_pcm_playback_avail(runtime) >= runtime->oss.period_frames;
2106 }
2107
2108 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2109 {
2110         struct snd_pcm_runtime *runtime = substream->runtime;
2111         if (atomic_read(&runtime->mmap_count))
2112                 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2113         else
2114                 return snd_pcm_capture_avail(runtime) >= runtime->oss.period_frames;
2115 }
2116
2117 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2118 {
2119         struct snd_pcm_oss_file *pcm_oss_file;
2120         unsigned int mask;
2121         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2122
2123         pcm_oss_file = file->private_data;
2124
2125         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2126         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2127
2128         mask = 0;
2129         if (psubstream != NULL) {
2130                 struct snd_pcm_runtime *runtime = psubstream->runtime;
2131                 poll_wait(file, &runtime->sleep, wait);
2132                 snd_pcm_stream_lock_irq(psubstream);
2133                 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2134                     (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2135                      snd_pcm_oss_playback_ready(psubstream)))
2136                         mask |= POLLOUT | POLLWRNORM;
2137                 snd_pcm_stream_unlock_irq(psubstream);
2138         }
2139         if (csubstream != NULL) {
2140                 struct snd_pcm_runtime *runtime = csubstream->runtime;
2141                 snd_pcm_state_t ostate;
2142                 poll_wait(file, &runtime->sleep, wait);
2143                 snd_pcm_stream_lock_irq(csubstream);
2144                 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2145                     snd_pcm_oss_capture_ready(csubstream))
2146                         mask |= POLLIN | POLLRDNORM;
2147                 snd_pcm_stream_unlock_irq(csubstream);
2148                 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2149                         struct snd_pcm_oss_file ofile;
2150                         memset(&ofile, 0, sizeof(ofile));
2151                         ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2152                         runtime->oss.trigger = 0;
2153                         snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2154                 }
2155         }
2156
2157         return mask;
2158 }
2159
2160 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2161 {
2162         struct snd_pcm_oss_file *pcm_oss_file;
2163         struct snd_pcm_substream *substream = NULL;
2164         struct snd_pcm_runtime *runtime;
2165         int err;
2166
2167 #ifdef OSS_DEBUG
2168         printk("pcm_oss: mmap begin\n");
2169 #endif
2170         pcm_oss_file = file->private_data;
2171         switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2172         case VM_READ | VM_WRITE:
2173                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2174                 if (substream)
2175                         break;
2176                 /* Fall through */
2177         case VM_READ:
2178                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2179                 break;
2180         case VM_WRITE:
2181                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2182                 break;
2183         default:
2184                 return -EINVAL;
2185         }
2186         /* set VM_READ access as well to fix memset() routines that do
2187            reads before writes (to improve performance) */
2188         area->vm_flags |= VM_READ;
2189         if (substream == NULL)
2190                 return -ENXIO;
2191         runtime = substream->runtime;
2192         if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2193                 return -EIO;
2194         if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2195                 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2196         else
2197                 return -EIO;
2198
2199         if (runtime->oss.params) {
2200                 if ((err = snd_pcm_oss_change_params(substream)) < 0)
2201                         return err;
2202         }
2203 #ifdef CONFIG_SND_PCM_OSS_PLUGINS
2204         if (runtime->oss.plugin_first != NULL)
2205                 return -EIO;
2206 #endif
2207
2208         if (area->vm_pgoff != 0)
2209                 return -EINVAL;
2210
2211         err = snd_pcm_mmap_data(substream, file, area);
2212         if (err < 0)
2213                 return err;
2214         runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2215         runtime->silence_threshold = 0;
2216         runtime->silence_size = 0;
2217 #ifdef OSS_DEBUG
2218         printk("pcm_oss: mmap ok, bytes = 0x%x\n", runtime->oss.mmap_bytes);
2219 #endif
2220         /* In mmap mode we never stop */
2221         runtime->stop_threshold = runtime->boundary;
2222
2223         return 0;
2224 }
2225
2226 #ifdef CONFIG_SND_VERBOSE_PROCFS
2227 /*
2228  *  /proc interface
2229  */
2230
2231 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2232                                   struct snd_info_buffer *buffer)
2233 {
2234         struct snd_pcm_str *pstr = entry->private_data;
2235         struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2236         mutex_lock(&pstr->oss.setup_mutex);
2237         while (setup) {
2238                 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2239                             setup->task_name,
2240                             setup->periods,
2241                             setup->period_size,
2242                             setup->disable ? " disable" : "",
2243                             setup->direct ? " direct" : "",
2244                             setup->block ? " block" : "",
2245                             setup->nonblock ? " non-block" : "",
2246                             setup->partialfrag ? " partial-frag" : "",
2247                             setup->nosilence ? " no-silence" : "");
2248                 setup = setup->next;
2249         }
2250         mutex_unlock(&pstr->oss.setup_mutex);
2251 }
2252
2253 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2254 {
2255         struct snd_pcm_oss_setup *setup, *setupn;
2256
2257         for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2258              setup; setup = setupn) {
2259                 setupn = setup->next;
2260                 kfree(setup->task_name);
2261                 kfree(setup);
2262         }
2263         pstr->oss.setup_list = NULL;
2264 }
2265
2266 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2267                                    struct snd_info_buffer *buffer)
2268 {
2269         struct snd_pcm_str *pstr = entry->private_data;
2270         char line[128], str[32], task_name[32], *ptr;
2271         int idx1;
2272         struct snd_pcm_oss_setup *setup, *setup1, template;
2273
2274         while (!snd_info_get_line(buffer, line, sizeof(line))) {
2275                 mutex_lock(&pstr->oss.setup_mutex);
2276                 memset(&template, 0, sizeof(template));
2277                 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2278                 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2279                         snd_pcm_oss_proc_free_setup_list(pstr);
2280                         mutex_unlock(&pstr->oss.setup_mutex);
2281                         continue;
2282                 }
2283                 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2284                         if (!strcmp(setup->task_name, task_name)) {
2285                                 template = *setup;
2286                                 break;
2287                         }
2288                 }
2289                 ptr = snd_info_get_str(str, ptr, sizeof(str));
2290                 template.periods = simple_strtoul(str, NULL, 10);
2291                 ptr = snd_info_get_str(str, ptr, sizeof(str));
2292                 template.period_size = simple_strtoul(str, NULL, 10);
2293                 for (idx1 = 31; idx1 >= 0; idx1--)
2294                         if (template.period_size & (1 << idx1))
2295                                 break;
2296                 for (idx1--; idx1 >= 0; idx1--)
2297                         template.period_size &= ~(1 << idx1);
2298                 do {
2299                         ptr = snd_info_get_str(str, ptr, sizeof(str));
2300                         if (!strcmp(str, "disable")) {
2301                                 template.disable = 1;
2302                         } else if (!strcmp(str, "direct")) {
2303                                 template.direct = 1;
2304                         } else if (!strcmp(str, "block")) {
2305                                 template.block = 1;
2306                         } else if (!strcmp(str, "non-block")) {
2307                                 template.nonblock = 1;
2308                         } else if (!strcmp(str, "partial-frag")) {
2309                                 template.partialfrag = 1;
2310                         } else if (!strcmp(str, "no-silence")) {
2311                                 template.nosilence = 1;
2312                         } else if (!strcmp(str, "buggy-ptr")) {
2313                                 template.buggyptr = 1;
2314                         }
2315                 } while (*str);
2316                 if (setup == NULL) {
2317                         setup = kmalloc(sizeof(*setup), GFP_KERNEL);
2318                         if (! setup) {
2319                                 buffer->error = -ENOMEM;
2320                                 mutex_lock(&pstr->oss.setup_mutex);
2321                                 return;
2322                         }
2323                         if (pstr->oss.setup_list == NULL)
2324                                 pstr->oss.setup_list = setup;
2325                         else {
2326                                 for (setup1 = pstr->oss.setup_list;
2327                                      setup1->next; setup1 = setup1->next);
2328                                 setup1->next = setup;
2329                         }
2330                         template.task_name = kstrdup(task_name, GFP_KERNEL);
2331                         if (! template.task_name) {
2332                                 kfree(setup);
2333                                 buffer->error = -ENOMEM;
2334                                 mutex_lock(&pstr->oss.setup_mutex);
2335                                 return;
2336                         }
2337                 }
2338                 *setup = template;
2339                 mutex_unlock(&pstr->oss.setup_mutex);
2340         }
2341 }
2342
2343 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
2344 {
2345         int stream;
2346         for (stream = 0; stream < 2; ++stream) {
2347                 struct snd_info_entry *entry;
2348                 struct snd_pcm_str *pstr = &pcm->streams[stream];
2349                 if (pstr->substream_count == 0)
2350                         continue;
2351                 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2352                         entry->content = SNDRV_INFO_CONTENT_TEXT;
2353                         entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
2354                         entry->c.text.read_size = 8192;
2355                         entry->c.text.read = snd_pcm_oss_proc_read;
2356                         entry->c.text.write_size = 8192;
2357                         entry->c.text.write = snd_pcm_oss_proc_write;
2358                         entry->private_data = pstr;
2359                         if (snd_info_register(entry) < 0) {
2360                                 snd_info_free_entry(entry);
2361                                 entry = NULL;
2362                         }
2363                 }
2364                 pstr->oss.proc_entry = entry;
2365         }
2366 }
2367
2368 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
2369 {
2370         int stream;
2371         for (stream = 0; stream < 2; ++stream) {
2372                 struct snd_pcm_str *pstr = &pcm->streams[stream];
2373                 if (pstr->oss.proc_entry) {
2374                         snd_info_unregister(pstr->oss.proc_entry);
2375                         pstr->oss.proc_entry = NULL;
2376                         snd_pcm_oss_proc_free_setup_list(pstr);
2377                 }
2378         }
2379 }
2380 #else /* !CONFIG_SND_VERBOSE_PROCFS */
2381 #define snd_pcm_oss_proc_init(pcm)
2382 #define snd_pcm_oss_proc_done(pcm)
2383 #endif /* CONFIG_SND_VERBOSE_PROCFS */
2384
2385 /*
2386  *  ENTRY functions
2387  */
2388
2389 static struct file_operations snd_pcm_oss_f_reg =
2390 {
2391         .owner =        THIS_MODULE,
2392         .read =         snd_pcm_oss_read,
2393         .write =        snd_pcm_oss_write,
2394         .open =         snd_pcm_oss_open,
2395         .release =      snd_pcm_oss_release,
2396         .poll =         snd_pcm_oss_poll,
2397         .unlocked_ioctl =       snd_pcm_oss_ioctl,
2398         .compat_ioctl = snd_pcm_oss_ioctl_compat,
2399         .mmap =         snd_pcm_oss_mmap,
2400 };
2401
2402 static void register_oss_dsp(struct snd_pcm *pcm, int index)
2403 {
2404         char name[128];
2405         sprintf(name, "dsp%i%i", pcm->card->number, pcm->device);
2406         if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2407                                     pcm->card, index, &snd_pcm_oss_f_reg,
2408                                     pcm, name) < 0) {
2409                 snd_printk(KERN_ERR "unable to register OSS PCM device %i:%i\n",
2410                            pcm->card->number, pcm->device);
2411         }
2412 }
2413
2414 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
2415 {
2416         pcm->oss.reg = 0;
2417         if (dsp_map[pcm->card->number] == (int)pcm->device) {
2418                 char name[128];
2419                 int duplex;
2420                 register_oss_dsp(pcm, 0);
2421                 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
2422                               pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
2423                               !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
2424                 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
2425 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
2426                 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
2427                                       pcm->card->number,
2428                                       name);
2429 #endif
2430                 pcm->oss.reg++;
2431                 pcm->oss.reg_mask |= 1;
2432         }
2433         if (adsp_map[pcm->card->number] == (int)pcm->device) {
2434                 register_oss_dsp(pcm, 1);
2435                 pcm->oss.reg++;
2436                 pcm->oss.reg_mask |= 2;
2437         }
2438
2439         if (pcm->oss.reg)
2440                 snd_pcm_oss_proc_init(pcm);
2441
2442         return 0;
2443 }
2444
2445 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
2446 {
2447         if (pcm->oss.reg) {
2448                 if (pcm->oss.reg_mask & 1) {
2449                         pcm->oss.reg_mask &= ~1;
2450                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2451                                                   pcm->card, 0);
2452                 }
2453                 if (pcm->oss.reg_mask & 2) {
2454                         pcm->oss.reg_mask &= ~2;
2455                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2456                                                   pcm->card, 1);
2457                 }
2458         }
2459         return 0;
2460 }
2461
2462 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
2463 {
2464         snd_pcm_oss_disconnect_minor(pcm);
2465         if (pcm->oss.reg) {
2466                 if (dsp_map[pcm->card->number] == (int)pcm->device) {
2467 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
2468                         snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
2469 #endif
2470                 }
2471                 pcm->oss.reg = 0;
2472                 snd_pcm_oss_proc_done(pcm);
2473         }
2474         return 0;
2475 }
2476
2477 static struct snd_pcm_notify snd_pcm_oss_notify =
2478 {
2479         .n_register =   snd_pcm_oss_register_minor,
2480         .n_disconnect = snd_pcm_oss_disconnect_minor,
2481         .n_unregister = snd_pcm_oss_unregister_minor,
2482 };
2483
2484 static int __init alsa_pcm_oss_init(void)
2485 {
2486         int i;
2487         int err;
2488
2489         /* check device map table */
2490         for (i = 0; i < SNDRV_CARDS; i++) {
2491                 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
2492                         snd_printk(KERN_ERR "invalid dsp_map[%d] = %d\n",
2493                                    i, dsp_map[i]);
2494                         dsp_map[i] = 0;
2495                 }
2496                 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
2497                         snd_printk(KERN_ERR "invalid adsp_map[%d] = %d\n",
2498                                    i, adsp_map[i]);
2499                         adsp_map[i] = 1;
2500                 }
2501         }
2502         if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
2503                 return err;
2504         return 0;
2505 }
2506
2507 static void __exit alsa_pcm_oss_exit(void)
2508 {
2509         snd_pcm_notify(&snd_pcm_oss_notify, 1);
2510 }
2511
2512 module_init(alsa_pcm_oss_init)
2513 module_exit(alsa_pcm_oss_exit)