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 static int snd_pcm_oss_plugin_clear(struct snd_pcm_substream *substream)
  82 {
  83         struct snd_pcm_runtime *runtime = substream->runtime;
  84         struct snd_pcm_plugin *plugin, *next;
  85
  86         plugin = runtime->oss.plugin_first;
  87         while (plugin) {
  88                 next = plugin->next;
  89                 snd_pcm_plugin_free(plugin);
  90                 plugin = next;
  91         }
  92         runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
  93         return 0;
  94 }
  95
  96 static int snd_pcm_plugin_insert(struct snd_pcm_plugin *plugin)
  97 {
  98         struct snd_pcm_runtime *runtime = plugin->plug->runtime;
  99         plugin->next = runtime->oss.plugin_first;
 100         plugin->prev = NULL;
 101         if (runtime->oss.plugin_first) {
 102                 runtime->oss.plugin_first->prev = plugin;
 103                 runtime->oss.plugin_first = plugin;
 104         } else {
 105                 runtime->oss.plugin_last =
 106                 runtime->oss.plugin_first = plugin;
 107         }
 108         return 0;
 109 }
 110
 111 int snd_pcm_plugin_append(struct snd_pcm_plugin *plugin)
 112 {
 113         struct snd_pcm_runtime *runtime = plugin->plug->runtime;
 114         plugin->next = NULL;
 115         plugin->prev = runtime->oss.plugin_last;
 116         if (runtime->oss.plugin_last) {
 117                 runtime->oss.plugin_last->next = plugin;
 118                 runtime->oss.plugin_last = plugin;
 119         } else {
 120                 runtime->oss.plugin_last =
 121                 runtime->oss.plugin_first = plugin;
 122         }
 123         return 0;
 124 }
 125
 126 static long snd_pcm_oss_bytes(struct snd_pcm_substream *substream, long frames)
 127 {
 128         struct snd_pcm_runtime *runtime = substream->runtime;
 129         long buffer_size = snd_pcm_lib_buffer_bytes(substream);
 130         long bytes = frames_to_bytes(runtime, frames);
 131         if (buffer_size == runtime->oss.buffer_bytes)
 132                 return bytes;
 133 #if BITS_PER_LONG >= 64
 134         return runtime->oss.buffer_bytes * bytes / buffer_size;
 135 #else
 136         {
 137                 u64 bsize = (u64)runtime->oss.buffer_bytes * (u64)bytes;
 138                 u32 rem;
 139                 div64_32(&bsize, buffer_size, &rem);
 140                 return (long)bsize;
 141         }
 142 #endif
 143 }
 144
 145 static long snd_pcm_alsa_frames(struct snd_pcm_substream *substream, long bytes)
 146 {
 147         struct snd_pcm_runtime *runtime = substream->runtime;
 148         long buffer_size = snd_pcm_lib_buffer_bytes(substream);
 149         if (buffer_size == runtime->oss.buffer_bytes)
 150                 return bytes_to_frames(runtime, bytes);
 151         return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
 152 }
 153
 154 static int snd_pcm_oss_format_from(int format)
 155 {
 156         switch (format) {
 157         case AFMT_MU_LAW:       return SNDRV_PCM_FORMAT_MU_LAW;
 158         case AFMT_A_LAW:        return SNDRV_PCM_FORMAT_A_LAW;
 159         case AFMT_IMA_ADPCM:    return SNDRV_PCM_FORMAT_IMA_ADPCM;
 160         case AFMT_U8:           return SNDRV_PCM_FORMAT_U8;
 161         case AFMT_S16_LE:       return SNDRV_PCM_FORMAT_S16_LE;
 162         case AFMT_S16_BE:       return SNDRV_PCM_FORMAT_S16_BE;
 163         case AFMT_S8:           return SNDRV_PCM_FORMAT_S8;
 164         case AFMT_U16_LE:       return SNDRV_PCM_FORMAT_U16_LE;
 165         case AFMT_U16_BE:       return SNDRV_PCM_FORMAT_U16_BE;
 166         case AFMT_MPEG:         return SNDRV_PCM_FORMAT_MPEG;
 167         default:                return SNDRV_PCM_FORMAT_U8;
 168         }
 169 }
 170
 171 static int snd_pcm_oss_format_to(int format)
 172 {
 173         switch (format) {
 174         case SNDRV_PCM_FORMAT_MU_LAW:   return AFMT_MU_LAW;
 175         case SNDRV_PCM_FORMAT_A_LAW:    return AFMT_A_LAW;
 176         case SNDRV_PCM_FORMAT_IMA_ADPCM:        return AFMT_IMA_ADPCM;
 177         case SNDRV_PCM_FORMAT_U8:               return AFMT_U8;
 178         case SNDRV_PCM_FORMAT_S16_LE:   return AFMT_S16_LE;
 179         case SNDRV_PCM_FORMAT_S16_BE:   return AFMT_S16_BE;
 180         case SNDRV_PCM_FORMAT_S8:               return AFMT_S8;
 181         case SNDRV_PCM_FORMAT_U16_LE:   return AFMT_U16_LE;
 182         case SNDRV_PCM_FORMAT_U16_BE:   return AFMT_U16_BE;
 183         case SNDRV_PCM_FORMAT_MPEG:             return AFMT_MPEG;
 184         default:                        return -EINVAL;
 185         }
 186 }
 187
 188 static int snd_pcm_oss_period_size(struct snd_pcm_substream *substream,
 189                                    struct snd_pcm_hw_params *oss_params,
 190                                    struct snd_pcm_hw_params *slave_params)
 191 {
 192         size_t s;
 193         size_t oss_buffer_size, oss_period_size, oss_periods;
 194         size_t min_period_size, max_period_size;
 195         struct snd_pcm_runtime *runtime = substream->runtime;
 196         size_t oss_frame_size;
 197
 198         oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
 199                          params_channels(oss_params) / 8;
 200
 201         oss_buffer_size = snd_pcm_plug_client_size(substream,
 202                                                    snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
 203         oss_buffer_size = 1 << ld2(oss_buffer_size);
 204         if (atomic_read(&runtime->mmap_count)) {
 205                 if (oss_buffer_size > runtime->oss.mmap_bytes)
 206                         oss_buffer_size = runtime->oss.mmap_bytes;
 207         }
 208
 209         if (substream->oss.setup &&
 210             substream->oss.setup->period_size > 16)
 211                 oss_period_size = substream->oss.setup->period_size;
 212         else if (runtime->oss.fragshift) {
 213                 oss_period_size = 1 << runtime->oss.fragshift;
 214                 if (oss_period_size > oss_buffer_size / 2)
 215                         oss_period_size = oss_buffer_size / 2;
 216         } else {
 217                 int sd;
 218                 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
 219
 220                 oss_period_size = oss_buffer_size;
 221                 do {
 222                         oss_period_size /= 2;
 223                 } while (oss_period_size > bytes_per_sec);
 224                 if (runtime->oss.subdivision == 0) {
 225                         sd = 4;
 226                         if (oss_period_size / sd > 4096)
 227                                 sd *= 2;
 228                         if (oss_period_size / sd < 4096)
 229                                 sd = 1;
 230                 } else
 231                         sd = runtime->oss.subdivision;
 232                 oss_period_size /= sd;
 233                 if (oss_period_size < 16)
 234                         oss_period_size = 16;
 235         }
 236
 237         min_period_size = snd_pcm_plug_client_size(substream,
 238                                                    snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
 239         min_period_size *= oss_frame_size;
 240         min_period_size = 1 << (ld2(min_period_size - 1) + 1);
 241         if (oss_period_size < min_period_size)
 242                 oss_period_size = min_period_size;
 243
 244         max_period_size = snd_pcm_plug_client_size(substream,
 245                                                    snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
 246         max_period_size *= oss_frame_size;
 247         max_period_size = 1 << ld2(max_period_size);
 248         if (oss_period_size > max_period_size)
 249                 oss_period_size = max_period_size;
 250
 251         oss_periods = oss_buffer_size / oss_period_size;
 252
 253         if (substream->oss.setup) {
 254                 if (substream->oss.setup->periods > 1)
 255                         oss_periods = substream->oss.setup->periods;
 256         }
 257
 258         s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
 259         if (runtime->oss.maxfrags && s > runtime->oss.maxfrags)
 260                 s = runtime->oss.maxfrags;
 261         if (oss_periods > s)
 262                 oss_periods = s;
 263
 264         s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
 265         if (s < 2)
 266                 s = 2;
 267         if (oss_periods < s)
 268                 oss_periods = s;
 269
 270         while (oss_period_size * oss_periods > oss_buffer_size)
 271                 oss_period_size /= 2;
 272
 273         snd_assert(oss_period_size >= 16, return -EINVAL);
 274         runtime->oss.period_bytes = oss_period_size;
 275         runtime->oss.period_frames = 1;
 276         runtime->oss.periods = oss_periods;
 277         return 0;
 278 }
 279
 280 static int choose_rate(struct snd_pcm_substream *substream,
 281                        struct snd_pcm_hw_params *params, unsigned int best_rate)
 282 {
 283         struct snd_interval *it;
 284         struct snd_pcm_hw_params *save;
 285         unsigned int rate, prev;
 286
 287         save = kmalloc(sizeof(*save), GFP_KERNEL);
 288         if (save == NULL)
 289                 return -ENOMEM;
 290         *save = *params;
 291         it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE);
 292
 293         /* try multiples of the best rate */
 294         rate = best_rate;
 295         for (;;) {
 296                 if (it->max < rate || (it->max == rate && it->openmax))
 297                         break;
 298                 if (it->min < rate || (it->min == rate && !it->openmin)) {
 299                         int ret;
 300                         ret = snd_pcm_hw_param_set(substream, params,
 301                                                    SNDRV_PCM_HW_PARAM_RATE,
 302                                                    rate, 0);
 303                         if (ret == (int)rate) {
 304                                 kfree(save);
 305                                 return rate;
 306                         }
 307                         *params = *save;
 308                 }
 309                 prev = rate;
 310                 rate += best_rate;
 311                 if (rate <= prev)
 312                         break;
 313         }
 314
 315         /* not found, use the nearest rate */
 316         kfree(save);
 317         return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
 318 }
 319
 320 static int snd_pcm_oss_change_params(struct snd_pcm_substream *substream)
 321 {
 322         struct snd_pcm_runtime *runtime = substream->runtime;
 323         struct snd_pcm_hw_params *params, *sparams;
 324         struct snd_pcm_sw_params *sw_params;
 325         ssize_t oss_buffer_size, oss_period_size;
 326         size_t oss_frame_size;
 327         int err;
 328         int direct;
 329         int format, sformat, n;
 330         struct snd_mask sformat_mask;
 331         struct snd_mask mask;
 332
 333         sw_params = kmalloc(sizeof(*sw_params), GFP_KERNEL);
 334         params = kmalloc(sizeof(*params), GFP_KERNEL);
 335         sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
 336         if (!sw_params || !params || !sparams) {
 337                 snd_printd("No memory\n");
 338                 err = -ENOMEM;
 339                 goto failure;
 340         }
 341
 342         if (atomic_read(&runtime->mmap_count)) {
 343                 direct = 1;
 344         } else {
 345                 struct snd_pcm_oss_setup *setup = substream->oss.setup;
 346                 direct = (setup != NULL && setup->direct);
 347         }
 348
 349         _snd_pcm_hw_params_any(sparams);
 350         _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
 351         _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
 352         snd_mask_none(&mask);
 353         if (atomic_read(&runtime->mmap_count))
 354                 snd_mask_set(&mask, SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
 355         else {
 356                 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_INTERLEAVED);
 357                 if (!direct)
 358                         snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
 359         }
 360         err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
 361         if (err < 0) {
 362                 snd_printd("No usable accesses\n");
 363                 err = -EINVAL;
 364                 goto failure;
 365         }
 366         choose_rate(substream, sparams, runtime->oss.rate);
 367         snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
 368
 369         format = snd_pcm_oss_format_from(runtime->oss.format);
 370
 371         sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
 372         if (direct)
 373                 sformat = format;
 374         else
 375                 sformat = snd_pcm_plug_slave_format(format, &sformat_mask);
 376
 377         if (sformat < 0 || !snd_mask_test(&sformat_mask, sformat)) {
 378                 for (sformat = 0; sformat <= SNDRV_PCM_FORMAT_LAST; sformat++) {
 379                         if (snd_mask_test(&sformat_mask, sformat) &&
 380                             snd_pcm_oss_format_to(sformat) >= 0)
 381                                 break;
 382                 }
 383                 if (sformat > SNDRV_PCM_FORMAT_LAST) {
 384                         snd_printd("Cannot find a format!!!\n");
 385                         err = -EINVAL;
 386                         goto failure;
 387                 }
 388         }
 389         err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, sformat, 0);
 390         snd_assert(err >= 0, goto failure);
 391
 392         if (direct) {
 393                 memcpy(params, sparams, sizeof(*params));
 394         } else {
 395                 _snd_pcm_hw_params_any(params);
 396                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
 397                                       SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
 398                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
 399                                       snd_pcm_oss_format_from(runtime->oss.format), 0);
 400                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
 401                                       runtime->oss.channels, 0);
 402                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
 403                                       runtime->oss.rate, 0);
 404                 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
 405                          params_access(params), params_format(params),
 406                          params_channels(params), params_rate(params));
 407         }
 408         pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
 409                  params_access(sparams), params_format(sparams),
 410                  params_channels(sparams), params_rate(sparams));
 411
 412         oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
 413                          params_channels(params) / 8;
 414
 415         snd_pcm_oss_plugin_clear(substream);
 416         if (!direct) {
 417                 /* add necessary plugins */
 418                 snd_pcm_oss_plugin_clear(substream);
 419                 if ((err = snd_pcm_plug_format_plugins(substream,
 420                                                        params,
 421                                                        sparams)) < 0) {
 422                         snd_printd("snd_pcm_plug_format_plugins failed: %i\n", err);
 423                         snd_pcm_oss_plugin_clear(substream);
 424                         goto failure;
 425                 }
 426                 if (runtime->oss.plugin_first) {
 427                         struct snd_pcm_plugin *plugin;
 428                         if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
 429                                 snd_printd("snd_pcm_plugin_build_io failed: %i\n", err);
 430                                 snd_pcm_oss_plugin_clear(substream);
 431                                 goto failure;
 432                         }
 433                         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 434                                 err = snd_pcm_plugin_append(plugin);
 435                         } else {
 436                                 err = snd_pcm_plugin_insert(plugin);
 437                         }
 438                         if (err < 0) {
 439                                 snd_pcm_oss_plugin_clear(substream);
 440                                 goto failure;
 441                         }
 442                 }
 443         }
 444
 445         err = snd_pcm_oss_period_size(substream, params, sparams);
 446         if (err < 0)
 447                 goto failure;
 448
 449         n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
 450         err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
 451         snd_assert(err >= 0, goto failure);
 452
 453         err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
 454                                      runtime->oss.periods, NULL);
 455         snd_assert(err >= 0, goto failure);
 456
 457         snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
 458
 459         if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) {
 460                 snd_printd("HW_PARAMS failed: %i\n", err);
 461                 goto failure;
 462         }
 463
 464         memset(sw_params, 0, sizeof(*sw_params));
 465         if (runtime->oss.trigger) {
 466                 sw_params->start_threshold = 1;
 467         } else {
 468                 sw_params->start_threshold = runtime->boundary;
 469         }
 470         if (atomic_read(&runtime->mmap_count) || substream->stream == SNDRV_PCM_STREAM_CAPTURE)
 471                 sw_params->stop_threshold = runtime->boundary;
 472         else
 473                 sw_params->stop_threshold = runtime->buffer_size;
 474         sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
 475         sw_params->period_step = 1;
 476         sw_params->sleep_min = 0;
 477         sw_params->avail_min = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ?
 478                 1 : runtime->period_size;
 479         sw_params->xfer_align = 1;
 480         if (atomic_read(&runtime->mmap_count) ||
 481             (substream->oss.setup && substream->oss.setup->nosilence)) {
 482                 sw_params->silence_threshold = 0;
 483                 sw_params->silence_size = 0;
 484         } else {
 485                 snd_pcm_uframes_t frames;
 486                 frames = runtime->period_size + 16;
 487                 if (frames > runtime->buffer_size)
 488                         frames = runtime->buffer_size;
 489                 sw_params->silence_threshold = frames;
 490                 sw_params->silence_size = frames;
 491         }
 492
 493         if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
 494                 snd_printd("SW_PARAMS failed: %i\n", err);
 495                 goto failure;
 496         }
 497
 498         runtime->oss.periods = params_periods(sparams);
 499         oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
 500         snd_assert(oss_period_size >= 0, err = -EINVAL; goto failure);
 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         oss_period_size *= oss_frame_size;
 507
 508         oss_buffer_size = oss_period_size * runtime->oss.periods;
 509         snd_assert(oss_buffer_size >= 0, err = -EINVAL; goto failure);
 510
 511         runtime->oss.period_bytes = oss_period_size;
 512         runtime->oss.buffer_bytes = oss_buffer_size;
 513
 514         pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
 515                  runtime->oss.period_bytes,
 516                  runtime->oss.buffer_bytes);
 517         pdprintf("slave: period_size = %i, buffer_size = %i\n",
 518                  params_period_size(sparams),
 519                  params_buffer_size(sparams));
 520
 521         runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
 522         runtime->oss.channels = params_channels(params);
 523         runtime->oss.rate = params_rate(params);
 524
 525         runtime->oss.params = 0;
 526         runtime->oss.prepare = 1;
 527         vfree(runtime->oss.buffer);
 528         runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
 529         runtime->oss.buffer_used = 0;
 530         if (runtime->dma_area)
 531                 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
 532
 533         runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
 534
 535         err = 0;
 536 failure:
 537         kfree(sw_params);
 538         kfree(params);
 539         kfree(sparams);
 540         return err;
 541 }
 542
 543 static int snd_pcm_oss_get_active_substream(struct snd_pcm_oss_file *pcm_oss_file, struct snd_pcm_substream **r_substream)
 544 {
 545         int idx, err;
 546         struct snd_pcm_substream *asubstream = NULL, *substream;
 547
 548         for (idx = 0; idx < 2; idx++) {
 549                 substream = pcm_oss_file->streams[idx];
 550                 if (substream == NULL)
 551                         continue;
 552                 if (asubstream == NULL)
 553                         asubstream = substream;
 554                 if (substream->runtime->oss.params) {
 555                         err = snd_pcm_oss_change_params(substream);
 556                         if (err < 0)
 557                                 return err;
 558                 }
 559         }
 560         snd_assert(asubstream != NULL, return -EIO);
 561         if (r_substream)
 562                 *r_substream = asubstream;
 563         return 0;
 564 }
 565
 566 static int snd_pcm_oss_prepare(struct snd_pcm_substream *substream)
 567 {
 568         int err;
 569         struct snd_pcm_runtime *runtime = substream->runtime;
 570
 571         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
 572         if (err < 0) {
 573                 snd_printd("snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
 574                 return err;
 575         }
 576         runtime->oss.prepare = 0;
 577         runtime->oss.prev_hw_ptr_interrupt = 0;
 578         runtime->oss.period_ptr = 0;
 579         runtime->oss.buffer_used = 0;
 580
 581         return 0;
 582 }
 583
 584 static int snd_pcm_oss_make_ready(struct snd_pcm_substream *substream)
 585 {
 586         struct snd_pcm_runtime *runtime;
 587         int err;
 588
 589         if (substream == NULL)
 590                 return 0;
 591         runtime = substream->runtime;
 592         if (runtime->oss.params) {
 593                 err = snd_pcm_oss_change_params(substream);
 594                 if (err < 0)
 595                         return err;
 596         }
 597         if (runtime->oss.prepare) {
 598                 err = snd_pcm_oss_prepare(substream);
 599                 if (err < 0)
 600                         return err;
 601         }
 602         return 0;
 603 }
 604
 605 static int snd_pcm_oss_capture_position_fixup(struct snd_pcm_substream *substream, snd_pcm_sframes_t *delay)
 606 {
 607         struct snd_pcm_runtime *runtime;
 608         snd_pcm_uframes_t frames;
 609         int err = 0;
 610
 611         while (1) {
 612                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
 613                 if (err < 0)
 614                         break;
 615                 runtime = substream->runtime;
 616                 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
 617                         break;
 618                 /* in case of overrun, skip whole periods like OSS/Linux driver does */
 619                 /* until avail(delay) <= buffer_size */
 620                 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
 621                 frames /= runtime->period_size;
 622                 frames *= runtime->period_size;
 623                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
 624                 if (err < 0)
 625                         break;
 626         }
 627         return err;
 628 }
 629
 630 snd_pcm_sframes_t snd_pcm_oss_write3(struct snd_pcm_substream *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
 631 {
 632         struct snd_pcm_runtime *runtime = substream->runtime;
 633         int ret;
 634         while (1) {
 635                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
 636                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
 637 #ifdef OSS_DEBUG
 638                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
 639                                 printk("pcm_oss: write: recovering from XRUN\n");
 640                         else
 641                                 printk("pcm_oss: write: recovering from SUSPEND\n");
 642 #endif
 643                         ret = snd_pcm_oss_prepare(substream);
 644                         if (ret < 0)
 645                                 break;
 646                 }
 647                 if (in_kernel) {
 648                         mm_segment_t fs;
 649                         fs = snd_enter_user();
 650                         ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
 651                         snd_leave_user(fs);
 652                 } else {
 653                         ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
 654                 }
 655                 if (ret != -EPIPE && ret != -ESTRPIPE)
 656                         break;
 657                 /* test, if we can't store new data, because the stream */
 658                 /* has not been started */
 659                 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
 660                         return -EAGAIN;
 661         }
 662         return ret;
 663 }
 664
 665 snd_pcm_sframes_t snd_pcm_oss_read3(struct snd_pcm_substream *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
 666 {
 667         struct snd_pcm_runtime *runtime = substream->runtime;
 668         snd_pcm_sframes_t delay;
 669         int ret;
 670         while (1) {
 671                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
 672                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
 673 #ifdef OSS_DEBUG
 674                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
 675                                 printk("pcm_oss: read: recovering from XRUN\n");
 676                         else
 677                                 printk("pcm_oss: read: recovering from SUSPEND\n");
 678 #endif
 679                         ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
 680                         if (ret < 0)
 681                                 break;
 682                 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
 683                         ret = snd_pcm_oss_prepare(substream);
 684                         if (ret < 0)
 685                                 break;
 686                 }
 687                 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
 688                 if (ret < 0)
 689                         break;
 690                 if (in_kernel) {
 691                         mm_segment_t fs;
 692                         fs = snd_enter_user();
 693                         ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
 694                         snd_leave_user(fs);
 695                 } else {
 696                         ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
 697                 }
 698                 if (ret == -EPIPE) {
 699                         if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
 700                                 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
 701                                 if (ret < 0)
 702                                         break;
 703                         }
 704                         continue;
 705                 }
 706                 if (ret != -ESTRPIPE)
 707                         break;
 708         }
 709         return ret;
 710 }
 711
 712 snd_pcm_sframes_t snd_pcm_oss_writev3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
 713 {
 714         struct snd_pcm_runtime *runtime = substream->runtime;
 715         int ret;
 716         while (1) {
 717                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
 718                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
 719 #ifdef OSS_DEBUG
 720                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
 721                                 printk("pcm_oss: writev: recovering from XRUN\n");
 722                         else
 723                                 printk("pcm_oss: writev: recovering from SUSPEND\n");
 724 #endif
 725                         ret = snd_pcm_oss_prepare(substream);
 726                         if (ret < 0)
 727                                 break;
 728                 }
 729                 if (in_kernel) {
 730                         mm_segment_t fs;
 731                         fs = snd_enter_user();
 732                         ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
 733                         snd_leave_user(fs);
 734                 } else {
 735                         ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
 736                 }
 737                 if (ret != -EPIPE && ret != -ESTRPIPE)
 738                         break;
 739
 740                 /* test, if we can't store new data, because the stream */
 741                 /* has not been started */
 742                 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
 743                         return -EAGAIN;
 744         }
 745         return ret;
 746 }
 747
 748 snd_pcm_sframes_t snd_pcm_oss_readv3(struct snd_pcm_substream *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
 749 {
 750         struct snd_pcm_runtime *runtime = substream->runtime;
 751         int ret;
 752         while (1) {
 753                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
 754                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
 755 #ifdef OSS_DEBUG
 756                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
 757                                 printk("pcm_oss: readv: recovering from XRUN\n");
 758                         else
 759                                 printk("pcm_oss: readv: recovering from SUSPEND\n");
 760 #endif
 761                         ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
 762                         if (ret < 0)
 763                                 break;
 764                 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
 765                         ret = snd_pcm_oss_prepare(substream);
 766                         if (ret < 0)
 767                                 break;
 768                 }
 769                 if (in_kernel) {
 770                         mm_segment_t fs;
 771                         fs = snd_enter_user();
 772                         ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
 773                         snd_leave_user(fs);
 774                 } else {
 775                         ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
 776                 }
 777                 if (ret != -EPIPE && ret != -ESTRPIPE)
 778                         break;
 779         }
 780         return ret;
 781 }
 782
 783 static ssize_t snd_pcm_oss_write2(struct snd_pcm_substream *substream, const char *buf, size_t bytes, int in_kernel)
 784 {
 785         struct snd_pcm_runtime *runtime = substream->runtime;
 786         snd_pcm_sframes_t frames, frames1;
 787         if (runtime->oss.plugin_first) {
 788                 struct snd_pcm_plugin_channel *channels;
 789                 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
 790                 if (!in_kernel) {
 791                         if (copy_from_user(runtime->oss.buffer, (const char __user *)buf, bytes))
 792                                 return -EFAULT;
 793                         buf = runtime->oss.buffer;
 794                 }
 795                 frames = bytes / oss_frame_bytes;
 796                 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
 797                 if (frames1 < 0)
 798                         return frames1;
 799                 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
 800                 if (frames1 <= 0)
 801                         return frames1;
 802                 bytes = frames1 * oss_frame_bytes;
 803         } else {
 804                 frames = bytes_to_frames(runtime, bytes);
 805                 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
 806                 if (frames1 <= 0)
 807                         return frames1;
 808                 bytes = frames_to_bytes(runtime, frames1);
 809         }
 810         return bytes;
 811 }
 812
 813 static ssize_t snd_pcm_oss_write1(struct snd_pcm_substream *substream, const char __user *buf, size_t bytes)
 814 {
 815         size_t xfer = 0;
 816         ssize_t tmp;
 817         struct snd_pcm_runtime *runtime = substream->runtime;
 818
 819         if (atomic_read(&runtime->mmap_count))
 820                 return -ENXIO;
 821
 822         if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
 823                 return tmp;
 824         while (bytes > 0) {
 825                 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
 826                         tmp = bytes;
 827                         if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
 828                                 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
 829                         if (tmp > 0) {
 830                                 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp))
 831                                         return xfer > 0 ? (snd_pcm_sframes_t)xfer : -EFAULT;
 832                         }
 833                         runtime->oss.buffer_used += tmp;
 834                         buf += tmp;
 835                         bytes -= tmp;
 836                         xfer += tmp;
 837                         if ((substream->oss.setup != NULL && substream->oss.setup->partialfrag) ||
 838                             runtime->oss.buffer_used == runtime->oss.period_bytes) {
 839                                 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
 840                                                          runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
 841                                 if (tmp <= 0)
 842                                         return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
 843                                 runtime->oss.bytes += tmp;
 844                                 runtime->oss.period_ptr += tmp;
 845                                 runtime->oss.period_ptr %= runtime->oss.period_bytes;
 846                                 if (runtime->oss.period_ptr == 0 ||
 847                                     runtime->oss.period_ptr == runtime->oss.buffer_used)
 848                                         runtime->oss.buffer_used = 0;
 849                                 else if ((substream->ffile->f_flags & O_NONBLOCK) != 0)
 850                                         return xfer > 0 ? xfer : -EAGAIN;
 851                         }
 852                 } else {
 853                         tmp = snd_pcm_oss_write2(substream,
 854                                                  (const char __force *)buf,
 855                                                  runtime->oss.period_bytes, 0);
 856                         if (tmp <= 0)
 857                                 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
 858                         runtime->oss.bytes += tmp;
 859                         buf += tmp;
 860                         bytes -= tmp;
 861                         xfer += tmp;
 862                         if ((substream->ffile->f_flags & O_NONBLOCK) != 0 &&
 863                             tmp != runtime->oss.period_bytes)
 864                                 break;
 865                 }
 866         }
 867         return xfer;
 868 }
 869
 870 static ssize_t snd_pcm_oss_read2(struct snd_pcm_substream *substream, char *buf, size_t bytes, int in_kernel)
 871 {
 872         struct snd_pcm_runtime *runtime = substream->runtime;
 873         snd_pcm_sframes_t frames, frames1;
 874         char __user *final_dst = (char __user *)buf;
 875         if (runtime->oss.plugin_first) {
 876                 struct snd_pcm_plugin_channel *channels;
 877                 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
 878                 if (!in_kernel)
 879                         buf = runtime->oss.buffer;
 880                 frames = bytes / oss_frame_bytes;
 881                 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
 882                 if (frames1 < 0)
 883                         return frames1;
 884                 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
 885                 if (frames1 <= 0)
 886                         return frames1;
 887                 bytes = frames1 * oss_frame_bytes;
 888                 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
 889                         return -EFAULT;
 890         } else {
 891                 frames = bytes_to_frames(runtime, bytes);
 892                 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
 893                 if (frames1 <= 0)
 894                         return frames1;
 895                 bytes = frames_to_bytes(runtime, frames1);
 896         }
 897         return bytes;
 898 }
 899
 900 static ssize_t snd_pcm_oss_read1(struct snd_pcm_substream *substream, char __user *buf, size_t bytes)
 901 {
 902         size_t xfer = 0;
 903         ssize_t tmp;
 904         struct snd_pcm_runtime *runtime = substream->runtime;
 905
 906         if (atomic_read(&runtime->mmap_count))
 907                 return -ENXIO;
 908
 909         if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
 910                 return tmp;
 911         while (bytes > 0) {
 912                 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
 913                         if (runtime->oss.buffer_used == 0) {
 914                                 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
 915                                 if (tmp <= 0)
 916                                         return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
 917                                 runtime->oss.bytes += tmp;
 918                                 runtime->oss.period_ptr = tmp;
 919                                 runtime->oss.buffer_used = tmp;
 920                         }
 921                         tmp = bytes;
 922                         if ((size_t) tmp > runtime->oss.buffer_used)
 923                                 tmp = runtime->oss.buffer_used;
 924                         if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp))
 925                                 return xfer > 0 ? (snd_pcm_sframes_t)xfer : -EFAULT;
 926                         buf += tmp;
 927                         bytes -= tmp;
 928                         xfer += tmp;
 929                         runtime->oss.buffer_used -= tmp;
 930                 } else {
 931                         tmp = snd_pcm_oss_read2(substream, (char __force *)buf,
 932                                                 runtime->oss.period_bytes, 0);
 933                         if (tmp <= 0)
 934                                 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
 935                         runtime->oss.bytes += tmp;
 936                         buf += tmp;
 937                         bytes -= tmp;
 938                         xfer += tmp;
 939                 }
 940         }
 941         return xfer;
 942 }
 943
 944 static int snd_pcm_oss_reset(struct snd_pcm_oss_file *pcm_oss_file)
 945 {
 946         struct snd_pcm_substream *substream;
 947
 948         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
 949         if (substream != NULL) {
 950                 snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
 951                 substream->runtime->oss.prepare = 1;
 952         }
 953         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
 954         if (substream != NULL) {
 955                 snd_pcm_kernel_capture_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
 956                 substream->runtime->oss.prepare = 1;
 957         }
 958         return 0;
 959 }
 960
 961 static int snd_pcm_oss_post(struct snd_pcm_oss_file *pcm_oss_file)
 962 {
 963         struct snd_pcm_substream *substream;
 964         int err;
 965
 966         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
 967         if (substream != NULL) {
 968                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
 969                         return err;
 970                 snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
 971         }
 972         /* note: all errors from the start action are ignored */
 973         /* OSS apps do not know, how to handle them */
 974         return 0;
 975 }
 976
 977 static int snd_pcm_oss_sync1(struct snd_pcm_substream *substream, size_t size)
 978 {
 979         struct snd_pcm_runtime *runtime;
 980         ssize_t result = 0;
 981         long res;
 982         wait_queue_t wait;
 983
 984         runtime = substream->runtime;
 985         init_waitqueue_entry(&wait, current);
 986         add_wait_queue(&runtime->sleep, &wait);
 987 #ifdef OSS_DEBUG
 988         printk("sync1: size = %li\n", size);
 989 #endif
 990         while (1) {
 991                 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
 992                 if (result > 0) {
 993                         runtime->oss.buffer_used = 0;
 994                         result = 0;
 995                         break;
 996                 }
 997                 if (result != 0 && result != -EAGAIN)
 998                         break;
 999                 result = 0;
1000                 set_current_state(TASK_INTERRUPTIBLE);
1001                 snd_pcm_stream_lock_irq(substream);
1002                 res = runtime->status->state;
1003                 snd_pcm_stream_unlock_irq(substream);
1004                 if (res != SNDRV_PCM_STATE_RUNNING) {
1005                         set_current_state(TASK_RUNNING);
1006                         break;
1007                 }
1008                 res = schedule_timeout(10 * HZ);
1009                 if (signal_pending(current)) {
1010                         result = -ERESTARTSYS;
1011                         break;
1012                 }
1013                 if (res == 0) {
1014                         snd_printk(KERN_ERR "OSS sync error - DMA timeout\n");
1015                         result = -EIO;
1016                         break;
1017                 }
1018         }
1019         remove_wait_queue(&runtime->sleep, &wait);
1020         return result;
1021 }
1022
1023 static int snd_pcm_oss_sync(struct snd_pcm_oss_file *pcm_oss_file)
1024 {
1025         int err = 0;
1026         unsigned int saved_f_flags;
1027         struct snd_pcm_substream *substream;
1028         struct snd_pcm_runtime *runtime;
1029         snd_pcm_format_t format;
1030         unsigned long width;
1031         size_t size;
1032
1033         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1034         if (substream != NULL) {
1035                 runtime = substream->runtime;
1036                 if (atomic_read(&runtime->mmap_count))
1037                         goto __direct;
1038                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1039                         return err;
1040                 format = snd_pcm_oss_format_from(runtime->oss.format);
1041                 width = snd_pcm_format_physical_width(format);
1042                 if (runtime->oss.buffer_used > 0) {
1043 #ifdef OSS_DEBUG
1044                         printk("sync: buffer_used\n");
1045 #endif
1046                         size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1047                         snd_pcm_format_set_silence(format,
1048                                                    runtime->oss.buffer + runtime->oss.buffer_used,
1049                                                    size);
1050                         err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1051                         if (err < 0)
1052                                 return err;
1053                 } else if (runtime->oss.period_ptr > 0) {
1054 #ifdef OSS_DEBUG
1055                         printk("sync: period_ptr\n");
1056 #endif
1057                         size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1058                         snd_pcm_format_set_silence(format,
1059                                                    runtime->oss.buffer,
1060                                                    size * 8 / width);
1061                         err = snd_pcm_oss_sync1(substream, size);
1062                         if (err < 0)
1063                                 return err;
1064                 }
1065                 /*
1066                  * The ALSA's period might be a bit large than OSS one.
1067                  * Fill the remain portion of ALSA period with zeros.
1068                  */
1069                 size = runtime->control->appl_ptr % runtime->period_size;
1070                 if (size > 0) {
1071                         size = runtime->period_size - size;
1072                         if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
1073                                 size = (runtime->frame_bits * size) / 8;
1074                                 while (size > 0) {
1075                                         mm_segment_t fs;
1076                                         size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes;
1077                                         size -= size1;
1078                                         size1 *= 8;
1079                                         size1 /= runtime->sample_bits;
1080                                         snd_pcm_format_set_silence(runtime->format,
1081                                                                    runtime->oss.buffer,
1082                                                                    size1);
1083                                         fs = snd_enter_user();
1084                                         snd_pcm_lib_write(substream, (void __user *)runtime->oss.buffer, size1);
1085                                         snd_leave_user(fs);
1086                                 }
1087                         } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
1088                                 void __user *buffers[runtime->channels];
1089                                 memset(buffers, 0, runtime->channels * sizeof(void *));
1090                                 snd_pcm_lib_writev(substream, buffers, size);
1091                         }
1092                 }
1093                 /*
1094                  * finish sync: drain the buffer
1095                  */
1096               __direct:
1097                 saved_f_flags = substream->ffile->f_flags;
1098                 substream->ffile->f_flags &= ~O_NONBLOCK;
1099                 err = snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1100                 substream->ffile->f_flags = saved_f_flags;
1101                 if (err < 0)
1102                         return err;
1103                 runtime->oss.prepare = 1;
1104         }
1105
1106         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1107         if (substream != NULL) {
1108                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1109                         return err;
1110                 runtime = substream->runtime;
1111                 err = snd_pcm_kernel_capture_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1112                 if (err < 0)
1113                         return err;
1114                 runtime->oss.buffer_used = 0;
1115                 runtime->oss.prepare = 1;
1116         }
1117         return 0;
1118 }
1119
1120 static int snd_pcm_oss_set_rate(struct snd_pcm_oss_file *pcm_oss_file, int rate)
1121 {
1122         int idx;
1123
1124         for (idx = 1; idx >= 0; --idx) {
1125                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1126                 struct snd_pcm_runtime *runtime;
1127                 if (substream == NULL)
1128                         continue;
1129                 runtime = substream->runtime;
1130                 if (rate < 1000)
1131                         rate = 1000;
1132                 else if (rate > 192000)
1133                         rate = 192000;
1134                 if (runtime->oss.rate != rate) {
1135                         runtime->oss.params = 1;
1136                         runtime->oss.rate = rate;
1137                 }
1138         }
1139         return snd_pcm_oss_get_rate(pcm_oss_file);
1140 }
1141
1142 static int snd_pcm_oss_get_rate(struct snd_pcm_oss_file *pcm_oss_file)
1143 {
1144         struct snd_pcm_substream *substream;
1145         int err;
1146
1147         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1148                 return err;
1149         return substream->runtime->oss.rate;
1150 }
1151
1152 static int snd_pcm_oss_set_channels(struct snd_pcm_oss_file *pcm_oss_file, unsigned int channels)
1153 {
1154         int idx;
1155         if (channels < 1)
1156                 channels = 1;
1157         if (channels > 128)
1158                 return -EINVAL;
1159         for (idx = 1; idx >= 0; --idx) {
1160                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1161                 struct snd_pcm_runtime *runtime;
1162                 if (substream == NULL)
1163                         continue;
1164                 runtime = substream->runtime;
1165                 if (runtime->oss.channels != channels) {
1166                         runtime->oss.params = 1;
1167                         runtime->oss.channels = channels;
1168                 }
1169         }
1170         return snd_pcm_oss_get_channels(pcm_oss_file);
1171 }
1172
1173 static int snd_pcm_oss_get_channels(struct snd_pcm_oss_file *pcm_oss_file)
1174 {
1175         struct snd_pcm_substream *substream;
1176         int err;
1177
1178         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1179                 return err;
1180         return substream->runtime->oss.channels;
1181 }
1182
1183 static int snd_pcm_oss_get_block_size(struct snd_pcm_oss_file *pcm_oss_file)
1184 {
1185         struct snd_pcm_substream *substream;
1186         int err;
1187
1188         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1189                 return err;
1190         return substream->runtime->oss.period_bytes;
1191 }
1192
1193 static int snd_pcm_oss_get_formats(struct snd_pcm_oss_file *pcm_oss_file)
1194 {
1195         struct snd_pcm_substream *substream;
1196         int err;
1197         int direct;
1198         struct snd_pcm_hw_params *params;
1199         unsigned int formats = 0;
1200         struct snd_mask format_mask;
1201         int fmt;
1202
1203         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1204                 return err;
1205         if (atomic_read(&substream->runtime->mmap_count)) {
1206                 direct = 1;
1207         } else {
1208                 struct snd_pcm_oss_setup *setup = substream->oss.setup;
1209                 direct = (setup != NULL && setup->direct);
1210         }
1211         if (!direct)
1212                 return AFMT_MU_LAW | AFMT_U8 |
1213                        AFMT_S16_LE | AFMT_S16_BE |
1214                        AFMT_S8 | AFMT_U16_LE |
1215                        AFMT_U16_BE;
1216         params = kmalloc(sizeof(*params), GFP_KERNEL);
1217         if (!params)
1218                 return -ENOMEM;
1219         _snd_pcm_hw_params_any(params);
1220         err = snd_pcm_hw_refine(substream, params);
1221         format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1222         kfree(params);
1223         snd_assert(err >= 0, return err);
1224         for (fmt = 0; fmt < 32; ++fmt) {
1225                 if (snd_mask_test(&format_mask, fmt)) {
1226                         int f = snd_pcm_oss_format_to(fmt);
1227                         if (f >= 0)
1228                                 formats |= f;
1229                 }
1230         }
1231         return formats;
1232 }
1233
1234 static int snd_pcm_oss_set_format(struct snd_pcm_oss_file *pcm_oss_file, int format)
1235 {
1236         int formats, idx;
1237
1238         if (format != AFMT_QUERY) {
1239                 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1240                 if (!(formats & format))
1241                         format = AFMT_U8;
1242                 for (idx = 1; idx >= 0; --idx) {
1243                         struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1244                         struct snd_pcm_runtime *runtime;
1245                         if (substream == NULL)
1246                                 continue;
1247                         runtime = substream->runtime;
1248                         if (runtime->oss.format != format) {
1249                                 runtime->oss.params = 1;
1250                                 runtime->oss.format = format;
1251                         }
1252                 }
1253         }
1254         return snd_pcm_oss_get_format(pcm_oss_file);
1255 }
1256
1257 static int snd_pcm_oss_get_format(struct snd_pcm_oss_file *pcm_oss_file)
1258 {
1259         struct snd_pcm_substream *substream;
1260         int err;
1261
1262         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1263                 return err;
1264         return substream->runtime->oss.format;
1265 }
1266
1267 static int snd_pcm_oss_set_subdivide1(struct snd_pcm_substream *substream, int subdivide)
1268 {
1269         struct snd_pcm_runtime *runtime;
1270
1271         if (substream == NULL)
1272                 return 0;
1273         runtime = substream->runtime;
1274         if (subdivide == 0) {
1275                 subdivide = runtime->oss.subdivision;
1276                 if (subdivide == 0)
1277                         subdivide = 1;
1278                 return subdivide;
1279         }
1280         if (runtime->oss.subdivision || runtime->oss.fragshift)
1281                 return -EINVAL;
1282         if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1283             subdivide != 8 && subdivide != 16)
1284                 return -EINVAL;
1285         runtime->oss.subdivision = subdivide;
1286         runtime->oss.params = 1;
1287         return subdivide;
1288 }
1289
1290 static int snd_pcm_oss_set_subdivide(struct snd_pcm_oss_file *pcm_oss_file, int subdivide)
1291 {
1292         int err = -EINVAL, idx;
1293
1294         for (idx = 1; idx >= 0; --idx) {
1295                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1296                 if (substream == NULL)
1297                         continue;
1298                 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1299                         return err;
1300         }
1301         return err;
1302 }
1303
1304 static int snd_pcm_oss_set_fragment1(struct snd_pcm_substream *substream, unsigned int val)
1305 {
1306         struct snd_pcm_runtime *runtime;
1307
1308         if (substream == NULL)
1309                 return 0;
1310         runtime = substream->runtime;
1311         if (runtime->oss.subdivision || runtime->oss.fragshift)
1312                 return -EINVAL;
1313         runtime->oss.fragshift = val & 0xffff;
1314         runtime->oss.maxfrags = (val >> 16) & 0xffff;
1315         if (runtime->oss.fragshift < 4)         /* < 16 */
1316                 runtime->oss.fragshift = 4;
1317         if (runtime->oss.maxfrags < 2)
1318                 runtime->oss.maxfrags = 2;
1319         runtime->oss.params = 1;
1320         return 0;
1321 }
1322
1323 static int snd_pcm_oss_set_fragment(struct snd_pcm_oss_file *pcm_oss_file, unsigned int val)
1324 {
1325         int err = -EINVAL, idx;
1326
1327         for (idx = 1; idx >= 0; --idx) {
1328                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1329                 if (substream == NULL)
1330                         continue;
1331                 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1332                         return err;
1333         }
1334         return err;
1335 }
1336
1337 static int snd_pcm_oss_nonblock(struct file * file)
1338 {
1339         file->f_flags |= O_NONBLOCK;
1340         return 0;
1341 }
1342
1343 static int snd_pcm_oss_get_caps1(struct snd_pcm_substream *substream, int res)
1344 {
1345
1346         if (substream == NULL) {
1347                 res &= ~DSP_CAP_DUPLEX;
1348                 return res;
1349         }
1350 #ifdef DSP_CAP_MULTI
1351         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1352                 if (substream->pstr->substream_count > 1)
1353                         res |= DSP_CAP_MULTI;
1354 #endif
1355         /* DSP_CAP_REALTIME is set all times: */
1356         /* all ALSA drivers can return actual pointer in ring buffer */
1357 #if defined(DSP_CAP_REALTIME) && 0
1358         {
1359                 struct snd_pcm_runtime *runtime = substream->runtime;
1360                 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1361                         res &= ~DSP_CAP_REALTIME;
1362         }
1363 #endif
1364         return res;
1365 }
1366
1367 static int snd_pcm_oss_get_caps(struct snd_pcm_oss_file *pcm_oss_file)
1368 {
1369         int result, idx;
1370
1371         result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1372         for (idx = 0; idx < 2; idx++) {
1373                 struct snd_pcm_substream *substream = pcm_oss_file->streams[idx];
1374                 result = snd_pcm_oss_get_caps1(substream, result);
1375         }
1376         result |= 0x0001;       /* revision - same as SB AWE 64 */
1377         return result;
1378 }
1379
1380 static void snd_pcm_oss_simulate_fill(struct snd_pcm_substream *substream, snd_pcm_uframes_t hw_ptr)
1381 {
1382         struct snd_pcm_runtime *runtime = substream->runtime;
1383         snd_pcm_uframes_t appl_ptr;
1384         appl_ptr = hw_ptr + runtime->buffer_size;
1385         appl_ptr %= runtime->boundary;
1386         runtime->control->appl_ptr = appl_ptr;
1387 }
1388
1389 static int snd_pcm_oss_set_trigger(struct snd_pcm_oss_file *pcm_oss_file, int trigger)
1390 {
1391         struct snd_pcm_runtime *runtime;
1392         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1393         int err, cmd;
1394
1395 #ifdef OSS_DEBUG
1396         printk("pcm_oss: trigger = 0x%x\n", trigger);
1397 #endif
1398
1399         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1400         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1401
1402         if (psubstream) {
1403                 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1404                         return err;
1405         }
1406         if (csubstream) {
1407                 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1408                         return err;
1409         }
1410         if (psubstream) {
1411                 runtime = psubstream->runtime;
1412                 if (trigger & PCM_ENABLE_OUTPUT) {
1413                         if (runtime->oss.trigger)
1414                                 goto _skip1;
1415                         if (atomic_read(&psubstream->runtime->mmap_count))
1416                                 snd_pcm_oss_simulate_fill(psubstream, runtime->hw_ptr_interrupt);
1417                         runtime->oss.trigger = 1;
1418                         runtime->start_threshold = 1;
1419                         cmd = SNDRV_PCM_IOCTL_START;
1420                 } else {
1421                         if (!runtime->oss.trigger)
1422                                 goto _skip1;
1423                         runtime->oss.trigger = 0;
1424                         runtime->start_threshold = runtime->boundary;
1425                         cmd = SNDRV_PCM_IOCTL_DROP;
1426                         runtime->oss.prepare = 1;
1427                 }
1428                 err = snd_pcm_kernel_playback_ioctl(psubstream, cmd, NULL);
1429                 if (err < 0)
1430                         return err;
1431         }
1432  _skip1:
1433         if (csubstream) {
1434                 runtime = csubstream->runtime;
1435                 if (trigger & PCM_ENABLE_INPUT) {
1436                         if (runtime->oss.trigger)
1437                                 goto _skip2;
1438                         runtime->oss.trigger = 1;
1439                         runtime->start_threshold = 1;
1440                         cmd = SNDRV_PCM_IOCTL_START;
1441                 } else {
1442                         if (!runtime->oss.trigger)
1443                                 goto _skip2;
1444                         runtime->oss.trigger = 0;
1445                         runtime->start_threshold = runtime->boundary;
1446                         cmd = SNDRV_PCM_IOCTL_DROP;
1447                         runtime->oss.prepare = 1;
1448                 }
1449                 err = snd_pcm_kernel_capture_ioctl(csubstream, cmd, NULL);
1450                 if (err < 0)
1451                         return err;
1452         }
1453  _skip2:
1454         return 0;
1455 }
1456
1457 static int snd_pcm_oss_get_trigger(struct snd_pcm_oss_file *pcm_oss_file)
1458 {
1459         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1460         int result = 0;
1461
1462         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1463         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1464         if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
1465                 result |= PCM_ENABLE_OUTPUT;
1466         if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
1467                 result |= PCM_ENABLE_INPUT;
1468         return result;
1469 }
1470
1471 static int snd_pcm_oss_get_odelay(struct snd_pcm_oss_file *pcm_oss_file)
1472 {
1473         struct snd_pcm_substream *substream;
1474         struct snd_pcm_runtime *runtime;
1475         snd_pcm_sframes_t delay;
1476         int err;
1477
1478         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1479         if (substream == NULL)
1480                 return -EINVAL;
1481         if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1482                 return err;
1483         runtime = substream->runtime;
1484         if (runtime->oss.params || runtime->oss.prepare)
1485                 return 0;
1486         err = snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
1487         if (err == -EPIPE)
1488                 delay = 0;      /* hack for broken OSS applications */
1489         else if (err < 0)
1490                 return err;
1491         return snd_pcm_oss_bytes(substream, delay);
1492 }
1493
1494 static int snd_pcm_oss_get_ptr(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct count_info __user * _info)
1495 {
1496         struct snd_pcm_substream *substream;
1497         struct snd_pcm_runtime *runtime;
1498         snd_pcm_sframes_t delay;
1499         int fixup;
1500         struct count_info info;
1501         int err;
1502
1503         if (_info == NULL)
1504                 return -EFAULT;
1505         substream = pcm_oss_file->streams[stream];
1506         if (substream == NULL)
1507                 return -EINVAL;
1508         if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1509                 return err;
1510         runtime = substream->runtime;
1511         if (runtime->oss.params || runtime->oss.prepare) {
1512                 memset(&info, 0, sizeof(info));
1513                 if (copy_to_user(_info, &info, sizeof(info)))
1514                         return -EFAULT;
1515                 return 0;
1516         }
1517         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1518                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
1519                 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
1520                         err = 0;
1521                         delay = 0;
1522                         fixup = 0;
1523                 } else {
1524                         fixup = runtime->oss.buffer_used;
1525                 }
1526         } else {
1527                 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
1528                 fixup = -runtime->oss.buffer_used;
1529         }
1530         if (err < 0)
1531                 return err;
1532         info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
1533         if (atomic_read(&runtime->mmap_count)) {
1534                 snd_pcm_sframes_t n;
1535                 n = (delay = runtime->hw_ptr_interrupt) - runtime->oss.prev_hw_ptr_interrupt;
1536                 if (n < 0)
1537                         n += runtime->boundary;
1538                 info.blocks = n / runtime->period_size;
1539                 runtime->oss.prev_hw_ptr_interrupt = delay;
1540                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1541                         snd_pcm_oss_simulate_fill(substream, delay);
1542                 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
1543         } else {
1544                 delay = snd_pcm_oss_bytes(substream, delay);
1545                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1546                         struct snd_pcm_oss_setup *setup = substream->oss.setup;
1547                         if (setup && setup->buggyptr)
1548                                 info.blocks = (runtime->oss.buffer_bytes - delay - fixup) / runtime->oss.period_bytes;
1549                         else
1550                                 info.blocks = (delay + fixup) / runtime->oss.period_bytes;
1551                         info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
1552                 } else {
1553                         delay += fixup;
1554                         info.blocks = delay / runtime->oss.period_bytes;
1555                         info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
1556                 }
1557         }
1558         if (copy_to_user(_info, &info, sizeof(info)))
1559                 return -EFAULT;
1560         return 0;
1561 }
1562
1563 static int snd_pcm_oss_get_space(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
1564 {
1565         struct snd_pcm_substream *substream;
1566         struct snd_pcm_runtime *runtime;
1567         snd_pcm_sframes_t avail;
1568         int fixup;
1569         struct audio_buf_info info;
1570         int err;
1571
1572         if (_info == NULL)
1573                 return -EFAULT;
1574         substream = pcm_oss_file->streams[stream];
1575         if (substream == NULL)
1576                 return -EINVAL;
1577         runtime = substream->runtime;
1578
1579         if (runtime->oss.params &&
1580             (err = snd_pcm_oss_change_params(substream)) < 0)
1581                 return err;
1582
1583         info.fragsize = runtime->oss.period_bytes;
1584         info.fragstotal = runtime->periods;
1585         if (runtime->oss.prepare) {
1586                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1587                         info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
1588                         info.fragments = runtime->oss.periods;
1589                 } else {
1590                         info.bytes = 0;
1591                         info.fragments = 0;
1592                 }
1593         } else {
1594                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1595                         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
1596                         if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
1597                                 avail = runtime->buffer_size;
1598                                 err = 0;
1599                                 fixup = 0;
1600                         } else {
1601                                 avail = runtime->buffer_size - avail;
1602                                 fixup = -runtime->oss.buffer_used;
1603                         }
1604                 } else {
1605                         err = snd_pcm_oss_capture_position_fixup(substream, &avail);
1606                         fixup = runtime->oss.buffer_used;
1607                 }
1608                 if (err < 0)
1609                         return err;
1610                 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
1611                 info.fragments = info.bytes / runtime->oss.period_bytes;
1612         }
1613
1614 #ifdef OSS_DEBUG
1615         printk("pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n", info.bytes, info.fragments, info.fragstotal, info.fragsize);
1616 #endif
1617         if (copy_to_user(_info, &info, sizeof(info)))
1618                 return -EFAULT;
1619         return 0;
1620 }
1621
1622 static int snd_pcm_oss_get_mapbuf(struct snd_pcm_oss_file *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
1623 {
1624         // it won't be probably implemented
1625         // snd_printd("TODO: snd_pcm_oss_get_mapbuf\n");
1626         return -EINVAL;
1627 }
1628
1629 static struct snd_pcm_oss_setup *snd_pcm_oss_look_for_setup(struct snd_pcm *pcm, int stream, const char *task_name)
1630 {
1631         const char *ptr, *ptrl;
1632         struct snd_pcm_oss_setup *setup;
1633
1634         down(&pcm->streams[stream].oss.setup_mutex);
1635         for (setup = pcm->streams[stream].oss.setup_list; setup; setup = setup->next) {
1636                 if (!strcmp(setup->task_name, task_name)) {
1637                         up(&pcm->streams[stream].oss.setup_mutex);
1638                         return setup;
1639                 }
1640         }
1641         ptr = ptrl = task_name;
1642         while (*ptr) {
1643                 if (*ptr == '/')
1644                         ptrl = ptr + 1;
1645                 ptr++;
1646         }
1647         if (ptrl == task_name) {
1648                 goto __not_found;
1649                 return NULL;
1650         }
1651         for (setup = pcm->streams[stream].oss.setup_list; setup; setup = setup->next) {
1652                 if (!strcmp(setup->task_name, ptrl)) {
1653                         up(&pcm->streams[stream].oss.setup_mutex);
1654                         return setup;
1655                 }
1656         }
1657       __not_found:
1658         up(&pcm->streams[stream].oss.setup_mutex);
1659         return NULL;
1660 }
1661
1662 static void snd_pcm_oss_init_substream(struct snd_pcm_substream *substream,
1663                                        struct snd_pcm_oss_setup *setup,
1664                                        int minor)
1665 {
1666         struct snd_pcm_runtime *runtime;
1667
1668         substream->oss.oss = 1;
1669         substream->oss.setup = setup;
1670         runtime = substream->runtime;
1671         runtime->oss.params = 1;
1672         runtime->oss.trigger = 1;
1673         runtime->oss.rate = 8000;
1674         switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
1675         case SNDRV_MINOR_OSS_PCM_8:
1676                 runtime->oss.format = AFMT_U8;
1677                 break;
1678         case SNDRV_MINOR_OSS_PCM_16:
1679                 runtime->oss.format = AFMT_S16_LE;
1680                 break;
1681         default:
1682                 runtime->oss.format = AFMT_MU_LAW;
1683         }
1684         runtime->oss.channels = 1;
1685         runtime->oss.fragshift = 0;
1686         runtime->oss.maxfrags = 0;
1687         runtime->oss.subdivision = 0;
1688 }
1689
1690 static void snd_pcm_oss_release_substream(struct snd_pcm_substream *substream)
1691 {
1692         struct snd_pcm_runtime *runtime;
1693         runtime = substream->runtime;
1694         vfree(runtime->oss.buffer);
1695         snd_pcm_oss_plugin_clear(substream);
1696         substream->oss.file = NULL;
1697         substream->oss.oss = 0;
1698 }
1699
1700 static int snd_pcm_oss_release_file(struct snd_pcm_oss_file *pcm_oss_file)
1701 {
1702         int cidx;
1703         snd_assert(pcm_oss_file != NULL, return -ENXIO);
1704         for (cidx = 0; cidx < 2; ++cidx) {
1705                 struct snd_pcm_substream *substream = pcm_oss_file->streams[cidx];
1706                 struct snd_pcm_runtime *runtime;
1707                 if (substream == NULL)
1708                         continue;
1709                 runtime = substream->runtime;
1710
1711                 snd_pcm_stream_lock_irq(substream);
1712                 if (snd_pcm_running(substream))
1713                         snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1714                 snd_pcm_stream_unlock_irq(substream);
1715                 if (substream->ffile != NULL) {
1716                         if (substream->ops->hw_free != NULL)
1717                                 substream->ops->hw_free(substream);
1718                         substream->ops->close(substream);
1719                         substream->ffile = NULL;
1720                 }
1721                 snd_pcm_oss_release_substream(substream);
1722                 snd_pcm_release_substream(substream);
1723         }
1724         kfree(pcm_oss_file);
1725         return 0;
1726 }
1727
1728 static int snd_pcm_oss_open_file(struct file *file,
1729                                  struct snd_pcm *pcm,
1730                                  struct snd_pcm_oss_file **rpcm_oss_file,
1731                                  int minor,
1732                                  struct snd_pcm_oss_setup *psetup,
1733                                  struct snd_pcm_oss_setup *csetup)
1734 {
1735         int err = 0;
1736         struct snd_pcm_oss_file *pcm_oss_file;
1737         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
1738         unsigned int f_mode = file->f_mode;
1739
1740         snd_assert(rpcm_oss_file != NULL, return -EINVAL);
1741         *rpcm_oss_file = NULL;
1742
1743         pcm_oss_file = kzalloc(sizeof(*pcm_oss_file), GFP_KERNEL);
1744         if (pcm_oss_file == NULL)
1745                 return -ENOMEM;
1746
1747         if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
1748             (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
1749                 f_mode = FMODE_WRITE;
1750         if ((f_mode & FMODE_WRITE) && !(psetup && psetup->disable)) {
1751                 if ((err = snd_pcm_open_substream(pcm, SNDRV_PCM_STREAM_PLAYBACK,
1752                                                &psubstream)) < 0) {
1753                         snd_pcm_oss_release_file(pcm_oss_file);
1754                         return err;
1755                 }
1756                 pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK] = psubstream;
1757         }
1758         if ((f_mode & FMODE_READ) && !(csetup && csetup->disable)) {
1759                 if ((err = snd_pcm_open_substream(pcm, SNDRV_PCM_STREAM_CAPTURE,
1760                                                &csubstream)) < 0) {
1761                         if (!(f_mode & FMODE_WRITE) || err != -ENODEV) {
1762                                 snd_pcm_oss_release_file(pcm_oss_file);
1763                                 return err;
1764                         } else {
1765                                 csubstream = NULL;
1766                         }
1767                 }
1768                 pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE] = csubstream;
1769         }
1770
1771         if (psubstream == NULL && csubstream == NULL) {
1772                 snd_pcm_oss_release_file(pcm_oss_file);
1773                 return -EINVAL;
1774         }
1775         if (psubstream != NULL) {
1776                 psubstream->oss.file = pcm_oss_file;
1777                 err = snd_pcm_hw_constraints_init(psubstream);
1778                 if (err < 0) {
1779                         snd_printd("snd_pcm_hw_constraint_init failed\n");
1780                         snd_pcm_oss_release_file(pcm_oss_file);
1781                         return err;
1782                 }
1783                 if ((err = psubstream->ops->open(psubstream)) < 0) {
1784                         snd_pcm_oss_release_file(pcm_oss_file);
1785                         return err;
1786                 }
1787                 psubstream->ffile = file;
1788                 err = snd_pcm_hw_constraints_complete(psubstream);
1789                 if (err < 0) {
1790                         snd_printd("snd_pcm_hw_constraint_complete failed\n");
1791                         snd_pcm_oss_release_file(pcm_oss_file);
1792                         return err;
1793                 }
1794                 snd_pcm_oss_init_substream(psubstream, psetup, minor);
1795         }
1796         if (csubstream != NULL) {
1797                 csubstream->oss.file = pcm_oss_file;
1798                 err = snd_pcm_hw_constraints_init(csubstream);
1799                 if (err < 0) {
1800                         snd_printd("snd_pcm_hw_constraint_init failed\n");
1801                         snd_pcm_oss_release_file(pcm_oss_file);
1802                         return err;
1803                 }
1804                 if ((err = csubstream->ops->open(csubstream)) < 0) {
1805                         snd_pcm_oss_release_file(pcm_oss_file);
1806                         return err;
1807                 }
1808                 csubstream->ffile = file;
1809                 err = snd_pcm_hw_constraints_complete(csubstream);
1810                 if (err < 0) {
1811                         snd_printd("snd_pcm_hw_constraint_complete failed\n");
1812                         snd_pcm_oss_release_file(pcm_oss_file);
1813                         return err;
1814                 }
1815                 snd_pcm_oss_init_substream(csubstream, csetup, minor);
1816         }
1817
1818         file->private_data = pcm_oss_file;
1819         *rpcm_oss_file = pcm_oss_file;
1820         return 0;
1821 }
1822
1823
1824 static int snd_task_name(struct task_struct *task, char *name, size_t size)
1825 {
1826         unsigned int idx;
1827
1828         snd_assert(task != NULL && name != NULL && size >= 2, return -EINVAL);
1829         for (idx = 0; idx < sizeof(task->comm) && idx + 1 < size; idx++)
1830                 name[idx] = task->comm[idx];
1831         name[idx] = '\0';
1832         return 0;
1833 }
1834
1835 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
1836 {
1837         int err;
1838         char task_name[32];
1839         struct snd_pcm *pcm;
1840         struct snd_pcm_oss_file *pcm_oss_file;
1841         struct snd_pcm_oss_setup *psetup = NULL, *csetup = NULL;
1842         int nonblock;
1843         wait_queue_t wait;
1844
1845         pcm = snd_lookup_oss_minor_data(iminor(inode),
1846                                         SNDRV_OSS_DEVICE_TYPE_PCM);
1847         if (pcm == NULL) {
1848                 err = -ENODEV;
1849                 goto __error1;
1850         }
1851         err = snd_card_file_add(pcm->card, file);
1852         if (err < 0)
1853                 goto __error1;
1854         if (!try_module_get(pcm->card->module)) {
1855                 err = -EFAULT;
1856                 goto __error2;
1857         }
1858         if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
1859                 err = -EFAULT;
1860                 goto __error;
1861         }
1862         if (file->f_mode & FMODE_WRITE)
1863                 psetup = snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK, task_name);
1864         if (file->f_mode & FMODE_READ)
1865                 csetup = snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE, task_name);
1866
1867         nonblock = !!(file->f_flags & O_NONBLOCK);
1868         if (psetup && !psetup->disable) {
1869                 if (psetup->nonblock)
1870                         nonblock = 1;
1871                 else if (psetup->block)
1872                         nonblock = 0;
1873         } else if (csetup && !csetup->disable) {
1874                 if (csetup->nonblock)
1875                         nonblock = 1;
1876                 else if (csetup->block)
1877                         nonblock = 0;
1878         }
1879         if (!nonblock)
1880                 nonblock = nonblock_open;
1881
1882         init_waitqueue_entry(&wait, current);
1883         add_wait_queue(&pcm->open_wait, &wait);
1884         down(&pcm->open_mutex);
1885         while (1) {
1886                 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
1887                                             iminor(inode), psetup, csetup);
1888                 if (err >= 0)
1889                         break;
1890                 if (err == -EAGAIN) {
1891                         if (nonblock) {
1892                                 err = -EBUSY;
1893                                 break;
1894                         }
1895                 } else
1896                         break;
1897                 set_current_state(TASK_INTERRUPTIBLE);
1898                 up(&pcm->open_mutex);
1899                 schedule();
1900                 down(&pcm->open_mutex);
1901                 if (signal_pending(current)) {
1902                         err = -ERESTARTSYS;
1903                         break;
1904                 }
1905         }
1906         remove_wait_queue(&pcm->open_wait, &wait);
1907         up(&pcm->open_mutex);
1908         if (err < 0)
1909                 goto __error;
1910         return err;
1911
1912       __error:
1913         module_put(pcm->card->module);
1914       __error2:
1915         snd_card_file_remove(pcm->card, file);
1916       __error1:
1917         return err;
1918 }
1919
1920 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
1921 {
1922         struct snd_pcm *pcm;
1923         struct snd_pcm_substream *substream;
1924         struct snd_pcm_oss_file *pcm_oss_file;
1925
1926         pcm_oss_file = file->private_data;
1927         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1928         if (substream == NULL)
1929                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1930         snd_assert(substream != NULL, return -ENXIO);
1931         pcm = substream->pcm;
1932         snd_pcm_oss_sync(pcm_oss_file);
1933         down(&pcm->open_mutex);
1934         snd_pcm_oss_release_file(pcm_oss_file);
1935         up(&pcm->open_mutex);
1936         wake_up(&pcm->open_wait);
1937         module_put(pcm->card->module);
1938         snd_card_file_remove(pcm->card, file);
1939         return 0;
1940 }
1941
1942 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1943 {
1944         struct snd_pcm_oss_file *pcm_oss_file;
1945         int __user *p = (int __user *)arg;
1946         int res;
1947
1948         pcm_oss_file = file->private_data;
1949         if (cmd == OSS_GETVERSION)
1950                 return put_user(SNDRV_OSS_VERSION, p);
1951         if (cmd == OSS_ALSAEMULVER)
1952                 return put_user(1, p);
1953 #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE))
1954         if (((cmd >> 8) & 0xff) == 'M') {       /* mixer ioctl - for OSS compatibility */
1955                 struct snd_pcm_substream *substream;
1956                 int idx;
1957                 for (idx = 0; idx < 2; ++idx) {
1958                         substream = pcm_oss_file->streams[idx];
1959                         if (substream != NULL)
1960                                 break;
1961                 }
1962                 snd_assert(substream != NULL, return -ENXIO);
1963                 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
1964         }
1965 #endif
1966         if (((cmd >> 8) & 0xff) != 'P')
1967                 return -EINVAL;
1968 #ifdef OSS_DEBUG
1969         printk("pcm_oss: ioctl = 0x%x\n", cmd);
1970 #endif
1971         switch (cmd) {
1972         case SNDCTL_DSP_RESET:
1973                 return snd_pcm_oss_reset(pcm_oss_file);
1974         case SNDCTL_DSP_SYNC:
1975                 return snd_pcm_oss_sync(pcm_oss_file);
1976         case SNDCTL_DSP_SPEED:
1977                 if (get_user(res, p))
1978                         return -EFAULT;
1979                 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
1980                         return res;
1981                 return put_user(res, p);
1982         case SOUND_PCM_READ_RATE:
1983                 res = snd_pcm_oss_get_rate(pcm_oss_file);
1984                 if (res < 0)
1985                         return res;
1986                 return put_user(res, p);
1987         case SNDCTL_DSP_STEREO:
1988                 if (get_user(res, p))
1989                         return -EFAULT;
1990                 res = res > 0 ? 2 : 1;
1991                 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
1992                         return res;
1993                 return put_user(--res, p);
1994         case SNDCTL_DSP_GETBLKSIZE:
1995                 res = snd_pcm_oss_get_block_size(pcm_oss_file);
1996                 if (res < 0)
1997                         return res;
1998                 return put_user(res, p);
1999         case SNDCTL_DSP_SETFMT:
2000                 if (get_user(res, p))
2001                         return -EFAULT;
2002                 res = snd_pcm_oss_set_format(pcm_oss_file, res);
2003                 if (res < 0)
2004                         return res;
2005                 return put_user(res, p);
2006         case SOUND_PCM_READ_BITS:
2007                 res = snd_pcm_oss_get_format(pcm_oss_file);
2008                 if (res < 0)
2009                         return res;
2010                 return put_user(res, p);
2011         case SNDCTL_DSP_CHANNELS:
2012                 if (get_user(res, p))
2013                         return -EFAULT;
2014                 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
2015                 if (res < 0)
2016                         return res;
2017                 return put_user(res, p);
2018         case SOUND_PCM_READ_CHANNELS:
2019                 res = snd_pcm_oss_get_channels(pcm_oss_file);
2020                 if (res < 0)
2021                         return res;
2022                 return put_user(res, p);
2023         case SOUND_PCM_WRITE_FILTER:
2024         case SOUND_PCM_READ_FILTER:
2025                 return -EIO;
2026         case SNDCTL_DSP_POST:
2027                 return snd_pcm_oss_post(pcm_oss_file);
2028         case SNDCTL_DSP_SUBDIVIDE:
2029                 if (get_user(res, p))
2030                         return -EFAULT;
2031                 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2032                 if (res < 0)
2033                         return res;
2034                 return put_user(res, p);
2035         case SNDCTL_DSP_SETFRAGMENT:
2036                 if (get_user(res, p))
2037                         return -EFAULT;
2038                 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2039         case SNDCTL_DSP_GETFMTS:
2040                 res = snd_pcm_oss_get_formats(pcm_oss_file);
2041                 if (res < 0)
2042                         return res;
2043                 return put_user(res, p);
2044         case SNDCTL_DSP_GETOSPACE:
2045         case SNDCTL_DSP_GETISPACE:
2046                 return snd_pcm_oss_get_space(pcm_oss_file,
2047                         cmd == SNDCTL_DSP_GETISPACE ?
2048                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2049                         (struct audio_buf_info __user *) arg);
2050         case SNDCTL_DSP_NONBLOCK:
2051                 return snd_pcm_oss_nonblock(file);
2052         case SNDCTL_DSP_GETCAPS:
2053                 res = snd_pcm_oss_get_caps(pcm_oss_file);
2054                 if (res < 0)
2055                         return res;
2056                 return put_user(res, p);
2057         case SNDCTL_DSP_GETTRIGGER:
2058                 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2059                 if (res < 0)
2060                         return res;
2061                 return put_user(res, p);
2062         case SNDCTL_DSP_SETTRIGGER:
2063                 if (get_user(res, p))
2064                         return -EFAULT;
2065                 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2066         case SNDCTL_DSP_GETIPTR:
2067         case SNDCTL_DSP_GETOPTR:
2068                 return snd_pcm_oss_get_ptr(pcm_oss_file,
2069                         cmd == SNDCTL_DSP_GETIPTR ?
2070                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2071                         (struct count_info __user *) arg);
2072         case SNDCTL_DSP_MAPINBUF:
2073         case SNDCTL_DSP_MAPOUTBUF:
2074                 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2075                         cmd == SNDCTL_DSP_MAPINBUF ?
2076                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2077                         (struct buffmem_desc __user *) arg);
2078         case SNDCTL_DSP_SETSYNCRO:
2079                 /* stop DMA now.. */
2080                 return 0;
2081         case SNDCTL_DSP_SETDUPLEX:
2082                 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2083                         return 0;
2084                 return -EIO;
2085         case SNDCTL_DSP_GETODELAY:
2086                 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2087                 if (res < 0) {
2088                         /* it's for sure, some broken apps don't check for error codes */
2089                         put_user(0, p);
2090                         return res;
2091                 }
2092                 return put_user(res, p);
2093         case SNDCTL_DSP_PROFILE:
2094                 return 0;       /* silently ignore */
2095         default:
2096                 snd_printd("pcm_oss: unknown command = 0x%x\n", cmd);
2097         }
2098         return -EINVAL;
2099 }
2100
2101 #ifdef CONFIG_COMPAT
2102 /* all compatible */
2103 #define snd_pcm_oss_ioctl_compat        snd_pcm_oss_ioctl
2104 #else
2105 #define snd_pcm_oss_ioctl_compat        NULL
2106 #endif
2107
2108 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2109 {
2110         struct snd_pcm_oss_file *pcm_oss_file;
2111         struct snd_pcm_substream *substream;
2112
2113         pcm_oss_file = file->private_data;
2114         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2115         if (substream == NULL)
2116                 return -ENXIO;
2117 #ifndef OSS_DEBUG
2118         return snd_pcm_oss_read1(substream, buf, count);
2119 #else
2120         {
2121                 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2122                 printk("pcm_oss: read %li bytes (returned %li bytes)\n", (long)count, (long)res);
2123                 return res;
2124         }
2125 #endif
2126 }
2127
2128 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2129 {
2130         struct snd_pcm_oss_file *pcm_oss_file;
2131         struct snd_pcm_substream *substream;
2132         long result;
2133
2134         pcm_oss_file = file->private_data;
2135         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2136         if (substream == NULL)
2137                 return -ENXIO;
2138         up(&file->f_dentry->d_inode->i_sem);
2139         result = snd_pcm_oss_write1(substream, buf, count);
2140         down(&file->f_dentry->d_inode->i_sem);
2141 #ifdef OSS_DEBUG
2142         printk("pcm_oss: write %li bytes (wrote %li bytes)\n", (long)count, (long)result);
2143 #endif
2144         return result;
2145 }
2146
2147 static int snd_pcm_oss_playback_ready(struct snd_pcm_substream *substream)
2148 {
2149         struct snd_pcm_runtime *runtime = substream->runtime;
2150         if (atomic_read(&runtime->mmap_count))
2151                 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2152         else
2153                 return snd_pcm_playback_avail(runtime) >= runtime->oss.period_frames;
2154 }
2155
2156 static int snd_pcm_oss_capture_ready(struct snd_pcm_substream *substream)
2157 {
2158         struct snd_pcm_runtime *runtime = substream->runtime;
2159         if (atomic_read(&runtime->mmap_count))
2160                 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2161         else
2162                 return snd_pcm_capture_avail(runtime) >= runtime->oss.period_frames;
2163 }
2164
2165 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2166 {
2167         struct snd_pcm_oss_file *pcm_oss_file;
2168         unsigned int mask;
2169         struct snd_pcm_substream *psubstream = NULL, *csubstream = NULL;
2170
2171         pcm_oss_file = file->private_data;
2172
2173         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2174         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2175
2176         mask = 0;
2177         if (psubstream != NULL) {
2178                 struct snd_pcm_runtime *runtime = psubstream->runtime;
2179                 poll_wait(file, &runtime->sleep, wait);
2180                 snd_pcm_stream_lock_irq(psubstream);
2181                 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2182                     (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2183                      snd_pcm_oss_playback_ready(psubstream)))
2184                         mask |= POLLOUT | POLLWRNORM;
2185                 snd_pcm_stream_unlock_irq(psubstream);
2186         }
2187         if (csubstream != NULL) {
2188                 struct snd_pcm_runtime *runtime = csubstream->runtime;
2189                 snd_pcm_state_t ostate;
2190                 poll_wait(file, &runtime->sleep, wait);
2191                 snd_pcm_stream_lock_irq(csubstream);
2192                 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2193                     snd_pcm_oss_capture_ready(csubstream))
2194                         mask |= POLLIN | POLLRDNORM;
2195                 snd_pcm_stream_unlock_irq(csubstream);
2196                 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2197                         struct snd_pcm_oss_file ofile;
2198                         memset(&ofile, 0, sizeof(ofile));
2199                         ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2200                         runtime->oss.trigger = 0;
2201                         snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2202                 }
2203         }
2204
2205         return mask;
2206 }
2207
2208 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2209 {
2210         struct snd_pcm_oss_file *pcm_oss_file;
2211         struct snd_pcm_substream *substream = NULL;
2212         struct snd_pcm_runtime *runtime;
2213         int err;
2214
2215 #ifdef OSS_DEBUG
2216         printk("pcm_oss: mmap begin\n");
2217 #endif
2218         pcm_oss_file = file->private_data;
2219         switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2220         case VM_READ | VM_WRITE:
2221                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2222                 if (substream)
2223                         break;
2224                 /* Fall through */
2225         case VM_READ:
2226                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2227                 break;
2228         case VM_WRITE:
2229                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2230                 break;
2231         default:
2232                 return -EINVAL;
2233         }
2234         /* set VM_READ access as well to fix memset() routines that do
2235            reads before writes (to improve performance) */
2236         area->vm_flags |= VM_READ;
2237         if (substream == NULL)
2238                 return -ENXIO;
2239         runtime = substream->runtime;
2240         if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2241                 return -EIO;
2242         if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2243                 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2244         else
2245                 return -EIO;
2246
2247         if (runtime->oss.params) {
2248                 if ((err = snd_pcm_oss_change_params(substream)) < 0)
2249                         return err;
2250         }
2251         if (runtime->oss.plugin_first != NULL)
2252                 return -EIO;
2253
2254         if (area->vm_pgoff != 0)
2255                 return -EINVAL;
2256
2257         err = snd_pcm_mmap_data(substream, file, area);
2258         if (err < 0)
2259                 return err;
2260         runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2261         runtime->silence_threshold = 0;
2262         runtime->silence_size = 0;
2263 #ifdef OSS_DEBUG
2264         printk("pcm_oss: mmap ok, bytes = 0x%x\n", runtime->oss.mmap_bytes);
2265 #endif
2266         /* In mmap mode we never stop */
2267         runtime->stop_threshold = runtime->boundary;
2268
2269         return 0;
2270 }
2271
2272 #ifdef CONFIG_PROC_FS
2273 /*
2274  *  /proc interface
2275  */
2276
2277 static void snd_pcm_oss_proc_read(struct snd_info_entry *entry,
2278                                   struct snd_info_buffer *buffer)
2279 {
2280         struct snd_pcm_str *pstr = entry->private_data;
2281         struct snd_pcm_oss_setup *setup = pstr->oss.setup_list;
2282         down(&pstr->oss.setup_mutex);
2283         while (setup) {
2284                 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2285                             setup->task_name,
2286                             setup->periods,
2287                             setup->period_size,
2288                             setup->disable ? " disable" : "",
2289                             setup->direct ? " direct" : "",
2290                             setup->block ? " block" : "",
2291                             setup->nonblock ? " non-block" : "",
2292                             setup->partialfrag ? " partial-frag" : "",
2293                             setup->nosilence ? " no-silence" : "");
2294                 setup = setup->next;
2295         }
2296         up(&pstr->oss.setup_mutex);
2297 }
2298
2299 static void snd_pcm_oss_proc_free_setup_list(struct snd_pcm_str * pstr)
2300 {
2301         unsigned int idx;
2302         struct snd_pcm_substream *substream;
2303         struct snd_pcm_oss_setup *setup, *setupn;
2304
2305         for (idx = 0, substream = pstr->substream;
2306              idx < pstr->substream_count; idx++, substream = substream->next)
2307                 substream->oss.setup = NULL;
2308         for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2309              setup; setup = setupn) {
2310                 setupn = setup->next;
2311                 kfree(setup->task_name);
2312                 kfree(setup);
2313         }
2314         pstr->oss.setup_list = NULL;
2315 }
2316
2317 static void snd_pcm_oss_proc_write(struct snd_info_entry *entry,
2318                                    struct snd_info_buffer *buffer)
2319 {
2320         struct snd_pcm_str *pstr = entry->private_data;
2321         char line[128], str[32], task_name[32], *ptr;
2322         int idx1;
2323         struct snd_pcm_oss_setup *setup, *setup1, template;
2324
2325         while (!snd_info_get_line(buffer, line, sizeof(line))) {
2326                 down(&pstr->oss.setup_mutex);
2327                 memset(&template, 0, sizeof(template));
2328                 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2329                 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2330                         snd_pcm_oss_proc_free_setup_list(pstr);
2331                         up(&pstr->oss.setup_mutex);
2332                         continue;
2333                 }
2334                 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2335                         if (!strcmp(setup->task_name, task_name)) {
2336                                 template = *setup;
2337                                 break;
2338                         }
2339                 }
2340                 ptr = snd_info_get_str(str, ptr, sizeof(str));
2341                 template.periods = simple_strtoul(str, NULL, 10);
2342                 ptr = snd_info_get_str(str, ptr, sizeof(str));
2343                 template.period_size = simple_strtoul(str, NULL, 10);
2344                 for (idx1 = 31; idx1 >= 0; idx1--)
2345                         if (template.period_size & (1 << idx1))
2346                                 break;
2347                 for (idx1--; idx1 >= 0; idx1--)
2348                         template.period_size &= ~(1 << idx1);
2349                 do {
2350                         ptr = snd_info_get_str(str, ptr, sizeof(str));
2351                         if (!strcmp(str, "disable")) {
2352                                 template.disable = 1;
2353                         } else if (!strcmp(str, "direct")) {
2354                                 template.direct = 1;
2355                         } else if (!strcmp(str, "block")) {
2356                                 template.block = 1;
2357                         } else if (!strcmp(str, "non-block")) {
2358                                 template.nonblock = 1;
2359                         } else if (!strcmp(str, "partial-frag")) {
2360                                 template.partialfrag = 1;
2361                         } else if (!strcmp(str, "no-silence")) {
2362                                 template.nosilence = 1;
2363                         } else if (!strcmp(str, "buggy-ptr")) {
2364                                 template.buggyptr = 1;
2365                         }
2366                 } while (*str);
2367                 if (setup == NULL) {
2368                         setup = kmalloc(sizeof(struct snd_pcm_oss_setup), GFP_KERNEL);
2369                         if (setup) {
2370                                 if (pstr->oss.setup_list == NULL) {
2371                                         pstr->oss.setup_list = setup;
2372                                 } else {
2373                                         for (setup1 = pstr->oss.setup_list; setup1->next; setup1 = setup1->next);
2374                                         setup1->next = setup;
2375                                 }
2376                                 template.task_name = kstrdup(task_name, GFP_KERNEL);
2377                         } else {
2378                                 buffer->error = -ENOMEM;
2379                         }
2380                 }
2381                 if (setup)
2382                         *setup = template;
2383                 up(&pstr->oss.setup_mutex);
2384         }
2385 }
2386
2387 static void snd_pcm_oss_proc_init(struct snd_pcm *pcm)
2388 {
2389         int stream;
2390         for (stream = 0; stream < 2; ++stream) {
2391                 struct snd_info_entry *entry;
2392                 struct snd_pcm_str *pstr = &pcm->streams[stream];
2393                 if (pstr->substream_count == 0)
2394                         continue;
2395                 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2396                         entry->content = SNDRV_INFO_CONTENT_TEXT;
2397                         entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
2398                         entry->c.text.read_size = 8192;
2399                         entry->c.text.read = snd_pcm_oss_proc_read;
2400                         entry->c.text.write_size = 8192;
2401                         entry->c.text.write = snd_pcm_oss_proc_write;
2402                         entry->private_data = pstr;
2403                         if (snd_info_register(entry) < 0) {
2404                                 snd_info_free_entry(entry);
2405                                 entry = NULL;
2406                         }
2407                 }
2408                 pstr->oss.proc_entry = entry;
2409         }
2410 }
2411
2412 static void snd_pcm_oss_proc_done(struct snd_pcm *pcm)
2413 {
2414         int stream;
2415         for (stream = 0; stream < 2; ++stream) {
2416                 struct snd_pcm_str *pstr = &pcm->streams[stream];
2417                 if (pstr->oss.proc_entry) {
2418                         snd_info_unregister(pstr->oss.proc_entry);
2419                         pstr->oss.proc_entry = NULL;
2420                         snd_pcm_oss_proc_free_setup_list(pstr);
2421                 }
2422         }
2423 }
2424 #else /* !CONFIG_PROC_FS */
2425 #define snd_pcm_oss_proc_init(pcm)
2426 #define snd_pcm_oss_proc_done(pcm)
2427 #endif /* CONFIG_PROC_FS */
2428
2429 /*
2430  *  ENTRY functions
2431  */
2432
2433 static struct file_operations snd_pcm_oss_f_reg =
2434 {
2435         .owner =        THIS_MODULE,
2436         .read =         snd_pcm_oss_read,
2437         .write =        snd_pcm_oss_write,
2438         .open =         snd_pcm_oss_open,
2439         .release =      snd_pcm_oss_release,
2440         .poll =         snd_pcm_oss_poll,
2441         .unlocked_ioctl =       snd_pcm_oss_ioctl,
2442         .compat_ioctl = snd_pcm_oss_ioctl_compat,
2443         .mmap =         snd_pcm_oss_mmap,
2444 };
2445
2446 static void register_oss_dsp(struct snd_pcm *pcm, int index)
2447 {
2448         char name[128];
2449         sprintf(name, "dsp%i%i", pcm->card->number, pcm->device);
2450         if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2451                                     pcm->card, index, &snd_pcm_oss_f_reg,
2452                                     pcm, name) < 0) {
2453                 snd_printk(KERN_ERR "unable to register OSS PCM device %i:%i\n",
2454                            pcm->card->number, pcm->device);
2455         }
2456 }
2457
2458 static int snd_pcm_oss_register_minor(struct snd_pcm *pcm)
2459 {
2460         pcm->oss.reg = 0;
2461         if (dsp_map[pcm->card->number] == (int)pcm->device) {
2462                 char name[128];
2463                 int duplex;
2464                 register_oss_dsp(pcm, 0);
2465                 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
2466                               pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
2467                               !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
2468                 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
2469 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
2470                 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
2471                                       pcm->card->number,
2472                                       name);
2473 #endif
2474                 pcm->oss.reg++;
2475                 pcm->oss.reg_mask |= 1;
2476         }
2477         if (adsp_map[pcm->card->number] == (int)pcm->device) {
2478                 register_oss_dsp(pcm, 1);
2479                 pcm->oss.reg++;
2480                 pcm->oss.reg_mask |= 2;
2481         }
2482
2483         if (pcm->oss.reg)
2484                 snd_pcm_oss_proc_init(pcm);
2485
2486         return 0;
2487 }
2488
2489 static int snd_pcm_oss_disconnect_minor(struct snd_pcm *pcm)
2490 {
2491         if (pcm->oss.reg) {
2492                 if (pcm->oss.reg_mask & 1) {
2493                         pcm->oss.reg_mask &= ~1;
2494                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2495                                                   pcm->card, 0);
2496                 }
2497                 if (pcm->oss.reg_mask & 2) {
2498                         pcm->oss.reg_mask &= ~2;
2499                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2500                                                   pcm->card, 1);
2501                 }
2502         }
2503         return 0;
2504 }
2505
2506 static int snd_pcm_oss_unregister_minor(struct snd_pcm *pcm)
2507 {
2508         snd_pcm_oss_disconnect_minor(pcm);
2509         if (pcm->oss.reg) {
2510                 if (dsp_map[pcm->card->number] == (int)pcm->device) {
2511 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
2512                         snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
2513 #endif
2514                 }
2515                 pcm->oss.reg = 0;
2516                 snd_pcm_oss_proc_done(pcm);
2517         }
2518         return 0;
2519 }
2520
2521 static struct snd_pcm_notify snd_pcm_oss_notify =
2522 {
2523         .n_register =   snd_pcm_oss_register_minor,
2524         .n_disconnect = snd_pcm_oss_disconnect_minor,
2525         .n_unregister = snd_pcm_oss_unregister_minor,
2526 };
2527
2528 static int __init alsa_pcm_oss_init(void)
2529 {
2530         int i;
2531         int err;
2532
2533         /* check device map table */
2534         for (i = 0; i < SNDRV_CARDS; i++) {
2535                 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
2536                         snd_printk(KERN_ERR "invalid dsp_map[%d] = %d\n",
2537                                    i, dsp_map[i]);
2538                         dsp_map[i] = 0;
2539                 }
2540                 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
2541                         snd_printk(KERN_ERR "invalid adsp_map[%d] = %d\n",
2542                                    i, adsp_map[i]);
2543                         adsp_map[i] = 1;
2544                 }
2545         }
2546         if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
2547                 return err;
2548         return 0;
2549 }
2550
2551 static void __exit alsa_pcm_oss_exit(void)
2552 {
2553         snd_pcm_notify(&snd_pcm_oss_notify, 1);
2554 }
2555
2556 module_init(alsa_pcm_oss_init)
2557 module_exit(alsa_pcm_oss_exit)