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 <sound/core.h>
  37 #include <sound/minors.h>
  38 #include <sound/pcm.h>
  39 #include <sound/pcm_params.h>
  40 #include "pcm_plugin.h"
  41 #include <sound/info.h>
  42 #include <linux/soundcard.h>
  43 #include <sound/initval.h>
  44
  45 #define OSS_ALSAEMULVER         _SIOR ('M', 249, int)
  46
  47 static int dsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 0};
  48 static int adsp_map[SNDRV_CARDS] = {[0 ... (SNDRV_CARDS-1)] = 1};
  49 static int nonblock_open = 1;
  50
  51 MODULE_AUTHOR("Jaroslav Kysela <perex@suse.cz>, Abramo Bagnara <abramo@alsa-project.org>");
  52 MODULE_DESCRIPTION("PCM OSS emulation for ALSA.");
  53 MODULE_LICENSE("GPL");
  54 module_param_array(dsp_map, int, NULL, 0444);
  55 MODULE_PARM_DESC(dsp_map, "PCM device number assigned to 1st OSS device.");
  56 module_param_array(adsp_map, int, NULL, 0444);
  57 MODULE_PARM_DESC(adsp_map, "PCM device number assigned to 2nd OSS device.");
  58 module_param(nonblock_open, bool, 0644);
  59 MODULE_PARM_DESC(nonblock_open, "Don't block opening busy PCM devices.");
  60 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM);
  61 MODULE_ALIAS_SNDRV_MINOR(SNDRV_MINOR_OSS_PCM1);
  62
  63 extern int snd_mixer_oss_ioctl_card(snd_card_t *card, unsigned int cmd, unsigned long arg);
  64 static int snd_pcm_oss_get_rate(snd_pcm_oss_file_t *pcm_oss_file);
  65 static int snd_pcm_oss_get_channels(snd_pcm_oss_file_t *pcm_oss_file);
  66 static int snd_pcm_oss_get_format(snd_pcm_oss_file_t *pcm_oss_file);
  67
  68 static inline mm_segment_t snd_enter_user(void)
  69 {
  70         mm_segment_t fs = get_fs();
  71         set_fs(get_ds());
  72         return fs;
  73 }
  74
  75 static inline void snd_leave_user(mm_segment_t fs)
  76 {
  77         set_fs(fs);
  78 }
  79
  80 static int snd_pcm_oss_plugin_clear(snd_pcm_substream_t *substream)
  81 {
  82         snd_pcm_runtime_t *runtime = substream->runtime;
  83         snd_pcm_plugin_t *plugin, *next;
  84
  85         plugin = runtime->oss.plugin_first;
  86         while (plugin) {
  87                 next = plugin->next;
  88                 snd_pcm_plugin_free(plugin);
  89                 plugin = next;
  90         }
  91         runtime->oss.plugin_first = runtime->oss.plugin_last = NULL;
  92         return 0;
  93 }
  94
  95 static int snd_pcm_plugin_insert(snd_pcm_plugin_t *plugin)
  96 {
  97         snd_pcm_runtime_t *runtime = plugin->plug->runtime;
  98         plugin->next = runtime->oss.plugin_first;
  99         plugin->prev = NULL;
 100         if (runtime->oss.plugin_first) {
 101                 runtime->oss.plugin_first->prev = plugin;
 102                 runtime->oss.plugin_first = plugin;
 103         } else {
 104                 runtime->oss.plugin_last =
 105                 runtime->oss.plugin_first = plugin;
 106         }
 107         return 0;
 108 }
 109
 110 int snd_pcm_plugin_append(snd_pcm_plugin_t *plugin)
 111 {
 112         snd_pcm_runtime_t *runtime = plugin->plug->runtime;
 113         plugin->next = NULL;
 114         plugin->prev = runtime->oss.plugin_last;
 115         if (runtime->oss.plugin_last) {
 116                 runtime->oss.plugin_last->next = plugin;
 117                 runtime->oss.plugin_last = plugin;
 118         } else {
 119                 runtime->oss.plugin_last =
 120                 runtime->oss.plugin_first = plugin;
 121         }
 122         return 0;
 123 }
 124
 125 static long snd_pcm_oss_bytes(snd_pcm_substream_t *substream, long frames)
 126 {
 127         snd_pcm_runtime_t *runtime = substream->runtime;
 128         snd_pcm_uframes_t buffer_size = snd_pcm_lib_buffer_bytes(substream);
 129         frames = frames_to_bytes(runtime, frames);
 130         if (buffer_size == runtime->oss.buffer_bytes)
 131                 return frames;
 132         return (runtime->oss.buffer_bytes * frames) / buffer_size;
 133 }
 134
 135 static long snd_pcm_alsa_frames(snd_pcm_substream_t *substream, long bytes)
 136 {
 137         snd_pcm_runtime_t *runtime = substream->runtime;
 138         snd_pcm_uframes_t buffer_size = snd_pcm_lib_buffer_bytes(substream);
 139         if (buffer_size == runtime->oss.buffer_bytes)
 140                 return bytes_to_frames(runtime, bytes);
 141         return bytes_to_frames(runtime, (buffer_size * bytes) / runtime->oss.buffer_bytes);
 142 }
 143
 144 static int snd_pcm_oss_format_from(int format)
 145 {
 146         switch (format) {
 147         case AFMT_MU_LAW:       return SNDRV_PCM_FORMAT_MU_LAW;
 148         case AFMT_A_LAW:        return SNDRV_PCM_FORMAT_A_LAW;
 149         case AFMT_IMA_ADPCM:    return SNDRV_PCM_FORMAT_IMA_ADPCM;
 150         case AFMT_U8:           return SNDRV_PCM_FORMAT_U8;
 151         case AFMT_S16_LE:       return SNDRV_PCM_FORMAT_S16_LE;
 152         case AFMT_S16_BE:       return SNDRV_PCM_FORMAT_S16_BE;
 153         case AFMT_S8:           return SNDRV_PCM_FORMAT_S8;
 154         case AFMT_U16_LE:       return SNDRV_PCM_FORMAT_U16_LE;
 155         case AFMT_U16_BE:       return SNDRV_PCM_FORMAT_U16_BE;
 156         case AFMT_MPEG:         return SNDRV_PCM_FORMAT_MPEG;
 157         default:                return SNDRV_PCM_FORMAT_U8;
 158         }
 159 }
 160
 161 static int snd_pcm_oss_format_to(int format)
 162 {
 163         switch (format) {
 164         case SNDRV_PCM_FORMAT_MU_LAW:   return AFMT_MU_LAW;
 165         case SNDRV_PCM_FORMAT_A_LAW:    return AFMT_A_LAW;
 166         case SNDRV_PCM_FORMAT_IMA_ADPCM:        return AFMT_IMA_ADPCM;
 167         case SNDRV_PCM_FORMAT_U8:               return AFMT_U8;
 168         case SNDRV_PCM_FORMAT_S16_LE:   return AFMT_S16_LE;
 169         case SNDRV_PCM_FORMAT_S16_BE:   return AFMT_S16_BE;
 170         case SNDRV_PCM_FORMAT_S8:               return AFMT_S8;
 171         case SNDRV_PCM_FORMAT_U16_LE:   return AFMT_U16_LE;
 172         case SNDRV_PCM_FORMAT_U16_BE:   return AFMT_U16_BE;
 173         case SNDRV_PCM_FORMAT_MPEG:             return AFMT_MPEG;
 174         default:                        return -EINVAL;
 175         }
 176 }
 177
 178 static int snd_pcm_oss_period_size(snd_pcm_substream_t *substream,
 179                                    snd_pcm_hw_params_t *oss_params,
 180                                    snd_pcm_hw_params_t *slave_params)
 181 {
 182         size_t s;
 183         size_t oss_buffer_size, oss_period_size, oss_periods;
 184         size_t min_period_size, max_period_size;
 185         snd_pcm_runtime_t *runtime = substream->runtime;
 186         size_t oss_frame_size;
 187
 188         oss_frame_size = snd_pcm_format_physical_width(params_format(oss_params)) *
 189                          params_channels(oss_params) / 8;
 190
 191         oss_buffer_size = snd_pcm_plug_client_size(substream,
 192                                                    snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_BUFFER_SIZE, NULL)) * oss_frame_size;
 193         oss_buffer_size = 1 << ld2(oss_buffer_size);
 194         if (atomic_read(&runtime->mmap_count)) {
 195                 if (oss_buffer_size > runtime->oss.mmap_bytes)
 196                         oss_buffer_size = runtime->oss.mmap_bytes;
 197         }
 198
 199         if (substream->oss.setup &&
 200             substream->oss.setup->period_size > 16)
 201                 oss_period_size = substream->oss.setup->period_size;
 202         else if (runtime->oss.fragshift) {
 203                 oss_period_size = 1 << runtime->oss.fragshift;
 204                 if (oss_period_size > oss_buffer_size / 2)
 205                         oss_period_size = oss_buffer_size / 2;
 206         } else {
 207                 int sd;
 208                 size_t bytes_per_sec = params_rate(oss_params) * snd_pcm_format_physical_width(params_format(oss_params)) * params_channels(oss_params) / 8;
 209
 210                 oss_period_size = oss_buffer_size;
 211                 do {
 212                         oss_period_size /= 2;
 213                 } while (oss_period_size > bytes_per_sec);
 214                 if (runtime->oss.subdivision == 0) {
 215                         sd = 4;
 216                         if (oss_period_size / sd > 4096)
 217                                 sd *= 2;
 218                         if (oss_period_size / sd < 4096)
 219                                 sd = 1;
 220                 } else
 221                         sd = runtime->oss.subdivision;
 222                 oss_period_size /= sd;
 223                 if (oss_period_size < 16)
 224                         oss_period_size = 16;
 225         }
 226
 227         min_period_size = snd_pcm_plug_client_size(substream,
 228                                                    snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
 229         min_period_size *= oss_frame_size;
 230         min_period_size = 1 << (ld2(min_period_size - 1) + 1);
 231         if (oss_period_size < min_period_size)
 232                 oss_period_size = min_period_size;
 233
 234         max_period_size = snd_pcm_plug_client_size(substream,
 235                                                    snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, NULL));
 236         max_period_size *= oss_frame_size;
 237         max_period_size = 1 << ld2(max_period_size);
 238         if (oss_period_size > max_period_size)
 239                 oss_period_size = max_period_size;
 240
 241         oss_periods = oss_buffer_size / oss_period_size;
 242
 243         if (substream->oss.setup) {
 244                 if (substream->oss.setup->periods > 1)
 245                         oss_periods = substream->oss.setup->periods;
 246         }
 247
 248         s = snd_pcm_hw_param_value_max(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
 249         if (runtime->oss.maxfrags && s > runtime->oss.maxfrags)
 250                 s = runtime->oss.maxfrags;
 251         if (oss_periods > s)
 252                 oss_periods = s;
 253
 254         s = snd_pcm_hw_param_value_min(slave_params, SNDRV_PCM_HW_PARAM_PERIODS, NULL);
 255         if (s < 2)
 256                 s = 2;
 257         if (oss_periods < s)
 258                 oss_periods = s;
 259
 260         while (oss_period_size * oss_periods > oss_buffer_size)
 261                 oss_period_size /= 2;
 262
 263         snd_assert(oss_period_size >= 16, return -EINVAL);
 264         runtime->oss.period_bytes = oss_period_size;
 265         runtime->oss.period_frames = 1;
 266         runtime->oss.periods = oss_periods;
 267         return 0;
 268 }
 269
 270 static int choose_rate(snd_pcm_substream_t *substream,
 271                        snd_pcm_hw_params_t *params, unsigned int best_rate)
 272 {
 273         snd_interval_t *it;
 274         snd_pcm_hw_params_t *save;
 275         unsigned int rate, prev;
 276
 277         save = kmalloc(sizeof(*save), GFP_KERNEL);
 278         if (save == NULL)
 279                 return -ENOMEM;
 280         *save = *params;
 281         it = hw_param_interval(save, SNDRV_PCM_HW_PARAM_RATE);
 282
 283         /* try multiples of the best rate */
 284         rate = best_rate;
 285         for (;;) {
 286                 if (it->max < rate || (it->max == rate && it->openmax))
 287                         break;
 288                 if (it->min < rate || (it->min == rate && !it->openmin)) {
 289                         int ret;
 290                         ret = snd_pcm_hw_param_set(substream, params,
 291                                                    SNDRV_PCM_HW_PARAM_RATE,
 292                                                    rate, 0);
 293                         if (ret == (int)rate) {
 294                                 kfree(save);
 295                                 return rate;
 296                         }
 297                         *params = *save;
 298                 }
 299                 prev = rate;
 300                 rate += best_rate;
 301                 if (rate <= prev)
 302                         break;
 303         }
 304
 305         /* not found, use the nearest rate */
 306         kfree(save);
 307         return snd_pcm_hw_param_near(substream, params, SNDRV_PCM_HW_PARAM_RATE, best_rate, NULL);
 308 }
 309
 310 static int snd_pcm_oss_change_params(snd_pcm_substream_t *substream)
 311 {
 312         snd_pcm_runtime_t *runtime = substream->runtime;
 313         snd_pcm_hw_params_t *params, *sparams;
 314         snd_pcm_sw_params_t *sw_params;
 315         ssize_t oss_buffer_size, oss_period_size;
 316         size_t oss_frame_size;
 317         int err;
 318         int direct;
 319         int format, sformat, n;
 320         snd_mask_t sformat_mask;
 321         snd_mask_t mask;
 322
 323         sw_params = kmalloc(sizeof(*sw_params), GFP_KERNEL);
 324         params = kmalloc(sizeof(*params), GFP_KERNEL);
 325         sparams = kmalloc(sizeof(*sparams), GFP_KERNEL);
 326         if (!sw_params || !params || !sparams) {
 327                 snd_printd("No memory\n");
 328                 err = -ENOMEM;
 329                 goto failure;
 330         }
 331
 332         if (atomic_read(&runtime->mmap_count)) {
 333                 direct = 1;
 334         } else {
 335                 snd_pcm_oss_setup_t *setup = substream->oss.setup;
 336                 direct = (setup != NULL && setup->direct);
 337         }
 338
 339         _snd_pcm_hw_params_any(sparams);
 340         _snd_pcm_hw_param_setinteger(sparams, SNDRV_PCM_HW_PARAM_PERIODS);
 341         _snd_pcm_hw_param_min(sparams, SNDRV_PCM_HW_PARAM_PERIODS, 2, 0);
 342         snd_mask_none(&mask);
 343         if (atomic_read(&runtime->mmap_count))
 344                 snd_mask_set(&mask, SNDRV_PCM_ACCESS_MMAP_INTERLEAVED);
 345         else {
 346                 snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_INTERLEAVED);
 347                 if (!direct)
 348                         snd_mask_set(&mask, SNDRV_PCM_ACCESS_RW_NONINTERLEAVED);
 349         }
 350         err = snd_pcm_hw_param_mask(substream, sparams, SNDRV_PCM_HW_PARAM_ACCESS, &mask);
 351         if (err < 0) {
 352                 snd_printd("No usable accesses\n");
 353                 err = -EINVAL;
 354                 goto failure;
 355         }
 356         choose_rate(substream, sparams, runtime->oss.rate);
 357         snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_CHANNELS, runtime->oss.channels, NULL);
 358
 359         format = snd_pcm_oss_format_from(runtime->oss.format);
 360
 361         sformat_mask = *hw_param_mask(sparams, SNDRV_PCM_HW_PARAM_FORMAT);
 362         if (direct)
 363                 sformat = format;
 364         else
 365                 sformat = snd_pcm_plug_slave_format(format, &sformat_mask);
 366
 367         if (sformat < 0 || !snd_mask_test(&sformat_mask, sformat)) {
 368                 for (sformat = 0; sformat <= SNDRV_PCM_FORMAT_LAST; sformat++) {
 369                         if (snd_mask_test(&sformat_mask, sformat) &&
 370                             snd_pcm_oss_format_to(sformat) >= 0)
 371                                 break;
 372                 }
 373                 if (sformat > SNDRV_PCM_FORMAT_LAST) {
 374                         snd_printd("Cannot find a format!!!\n");
 375                         err = -EINVAL;
 376                         goto failure;
 377                 }
 378         }
 379         err = _snd_pcm_hw_param_set(sparams, SNDRV_PCM_HW_PARAM_FORMAT, sformat, 0);
 380         snd_assert(err >= 0, goto failure);
 381
 382         if (direct) {
 383                 memcpy(params, sparams, sizeof(*params));
 384         } else {
 385                 _snd_pcm_hw_params_any(params);
 386                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_ACCESS,
 387                                       SNDRV_PCM_ACCESS_RW_INTERLEAVED, 0);
 388                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_FORMAT,
 389                                       snd_pcm_oss_format_from(runtime->oss.format), 0);
 390                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_CHANNELS,
 391                                       runtime->oss.channels, 0);
 392                 _snd_pcm_hw_param_set(params, SNDRV_PCM_HW_PARAM_RATE,
 393                                       runtime->oss.rate, 0);
 394                 pdprintf("client: access = %i, format = %i, channels = %i, rate = %i\n",
 395                          params_access(params), params_format(params),
 396                          params_channels(params), params_rate(params));
 397         }
 398         pdprintf("slave: access = %i, format = %i, channels = %i, rate = %i\n",
 399                  params_access(sparams), params_format(sparams),
 400                  params_channels(sparams), params_rate(sparams));
 401
 402         oss_frame_size = snd_pcm_format_physical_width(params_format(params)) *
 403                          params_channels(params) / 8;
 404
 405         snd_pcm_oss_plugin_clear(substream);
 406         if (!direct) {
 407                 /* add necessary plugins */
 408                 snd_pcm_oss_plugin_clear(substream);
 409                 if ((err = snd_pcm_plug_format_plugins(substream,
 410                                                        params,
 411                                                        sparams)) < 0) {
 412                         snd_printd("snd_pcm_plug_format_plugins failed: %i\n", err);
 413                         snd_pcm_oss_plugin_clear(substream);
 414                         goto failure;
 415                 }
 416                 if (runtime->oss.plugin_first) {
 417                         snd_pcm_plugin_t *plugin;
 418                         if ((err = snd_pcm_plugin_build_io(substream, sparams, &plugin)) < 0) {
 419                                 snd_printd("snd_pcm_plugin_build_io failed: %i\n", err);
 420                                 snd_pcm_oss_plugin_clear(substream);
 421                                 goto failure;
 422                         }
 423                         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
 424                                 err = snd_pcm_plugin_append(plugin);
 425                         } else {
 426                                 err = snd_pcm_plugin_insert(plugin);
 427                         }
 428                         if (err < 0) {
 429                                 snd_pcm_oss_plugin_clear(substream);
 430                                 goto failure;
 431                         }
 432                 }
 433         }
 434
 435         err = snd_pcm_oss_period_size(substream, params, sparams);
 436         if (err < 0)
 437                 goto failure;
 438
 439         n = snd_pcm_plug_slave_size(substream, runtime->oss.period_bytes / oss_frame_size);
 440         err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIOD_SIZE, n, NULL);
 441         snd_assert(err >= 0, goto failure);
 442
 443         err = snd_pcm_hw_param_near(substream, sparams, SNDRV_PCM_HW_PARAM_PERIODS,
 444                                      runtime->oss.periods, NULL);
 445         snd_assert(err >= 0, goto failure);
 446
 447         snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
 448
 449         if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_HW_PARAMS, sparams)) < 0) {
 450                 snd_printd("HW_PARAMS failed: %i\n", err);
 451                 goto failure;
 452         }
 453
 454         memset(sw_params, 0, sizeof(*sw_params));
 455         if (runtime->oss.trigger) {
 456                 sw_params->start_threshold = 1;
 457         } else {
 458                 sw_params->start_threshold = runtime->boundary;
 459         }
 460         if (atomic_read(&runtime->mmap_count) || substream->stream == SNDRV_PCM_STREAM_CAPTURE)
 461                 sw_params->stop_threshold = runtime->boundary;
 462         else
 463                 sw_params->stop_threshold = runtime->buffer_size;
 464         sw_params->tstamp_mode = SNDRV_PCM_TSTAMP_NONE;
 465         sw_params->period_step = 1;
 466         sw_params->sleep_min = 0;
 467         sw_params->avail_min = 1;
 468         sw_params->xfer_align = 1;
 469         if (atomic_read(&runtime->mmap_count) ||
 470             (substream->oss.setup && substream->oss.setup->nosilence)) {
 471                 sw_params->silence_threshold = 0;
 472                 sw_params->silence_size = 0;
 473         } else {
 474                 snd_pcm_uframes_t frames;
 475                 frames = runtime->period_size + 16;
 476                 if (frames > runtime->buffer_size)
 477                         frames = runtime->buffer_size;
 478                 sw_params->silence_threshold = frames;
 479                 sw_params->silence_size = frames;
 480         }
 481
 482         if ((err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_SW_PARAMS, sw_params)) < 0) {
 483                 snd_printd("SW_PARAMS failed: %i\n", err);
 484                 goto failure;
 485         }
 486
 487         runtime->oss.periods = params_periods(sparams);
 488         oss_period_size = snd_pcm_plug_client_size(substream, params_period_size(sparams));
 489         snd_assert(oss_period_size >= 0, err = -EINVAL; goto failure);
 490         if (runtime->oss.plugin_first) {
 491                 err = snd_pcm_plug_alloc(substream, oss_period_size);
 492                 if (err < 0)
 493                         goto failure;
 494         }
 495         oss_period_size *= oss_frame_size;
 496
 497         oss_buffer_size = oss_period_size * runtime->oss.periods;
 498         snd_assert(oss_buffer_size >= 0, err = -EINVAL; goto failure);
 499
 500         runtime->oss.period_bytes = oss_period_size;
 501         runtime->oss.buffer_bytes = oss_buffer_size;
 502
 503         pdprintf("oss: period bytes = %i, buffer bytes = %i\n",
 504                  runtime->oss.period_bytes,
 505                  runtime->oss.buffer_bytes);
 506         pdprintf("slave: period_size = %i, buffer_size = %i\n",
 507                  params_period_size(sparams),
 508                  params_buffer_size(sparams));
 509
 510         runtime->oss.format = snd_pcm_oss_format_to(params_format(params));
 511         runtime->oss.channels = params_channels(params);
 512         runtime->oss.rate = params_rate(params);
 513
 514         runtime->oss.params = 0;
 515         runtime->oss.prepare = 1;
 516         vfree(runtime->oss.buffer);
 517         runtime->oss.buffer = vmalloc(runtime->oss.period_bytes);
 518         runtime->oss.buffer_used = 0;
 519         if (runtime->dma_area)
 520                 snd_pcm_format_set_silence(runtime->format, runtime->dma_area, bytes_to_samples(runtime, runtime->dma_bytes));
 521
 522         runtime->oss.period_frames = snd_pcm_alsa_frames(substream, oss_period_size);
 523
 524         err = 0;
 525 failure:
 526         kfree(sw_params);
 527         kfree(params);
 528         kfree(sparams);
 529         return err;
 530 }
 531
 532 static int snd_pcm_oss_get_active_substream(snd_pcm_oss_file_t *pcm_oss_file, snd_pcm_substream_t **r_substream)
 533 {
 534         int idx, err;
 535         snd_pcm_substream_t *asubstream = NULL, *substream;
 536
 537         for (idx = 0; idx < 2; idx++) {
 538                 substream = pcm_oss_file->streams[idx];
 539                 if (substream == NULL)
 540                         continue;
 541                 if (asubstream == NULL)
 542                         asubstream = substream;
 543                 if (substream->runtime->oss.params) {
 544                         err = snd_pcm_oss_change_params(substream);
 545                         if (err < 0)
 546                                 return err;
 547                 }
 548         }
 549         snd_assert(asubstream != NULL, return -EIO);
 550         if (r_substream)
 551                 *r_substream = asubstream;
 552         return 0;
 553 }
 554
 555 static int snd_pcm_oss_prepare(snd_pcm_substream_t *substream)
 556 {
 557         int err;
 558         snd_pcm_runtime_t *runtime = substream->runtime;
 559
 560         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_PREPARE, NULL);
 561         if (err < 0) {
 562                 snd_printd("snd_pcm_oss_prepare: SNDRV_PCM_IOCTL_PREPARE failed\n");
 563                 return err;
 564         }
 565         runtime->oss.prepare = 0;
 566         runtime->oss.prev_hw_ptr_interrupt = 0;
 567         runtime->oss.period_ptr = 0;
 568         runtime->oss.buffer_used = 0;
 569
 570         return 0;
 571 }
 572
 573 static int snd_pcm_oss_make_ready(snd_pcm_substream_t *substream)
 574 {
 575         snd_pcm_runtime_t *runtime;
 576         int err;
 577
 578         if (substream == NULL)
 579                 return 0;
 580         runtime = substream->runtime;
 581         if (runtime->oss.params) {
 582                 err = snd_pcm_oss_change_params(substream);
 583                 if (err < 0)
 584                         return err;
 585         }
 586         if (runtime->oss.prepare) {
 587                 err = snd_pcm_oss_prepare(substream);
 588                 if (err < 0)
 589                         return err;
 590         }
 591         return 0;
 592 }
 593
 594 static int snd_pcm_oss_capture_position_fixup(snd_pcm_substream_t *substream, snd_pcm_sframes_t *delay)
 595 {
 596         snd_pcm_runtime_t *runtime;
 597         snd_pcm_uframes_t frames;
 598         int err = 0;
 599
 600         while (1) {
 601                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, delay);
 602                 if (err < 0)
 603                         break;
 604                 runtime = substream->runtime;
 605                 if (*delay <= (snd_pcm_sframes_t)runtime->buffer_size)
 606                         break;
 607                 /* in case of overrun, skip whole periods like OSS/Linux driver does */
 608                 /* until avail(delay) <= buffer_size */
 609                 frames = (*delay - runtime->buffer_size) + runtime->period_size - 1;
 610                 frames /= runtime->period_size;
 611                 frames *= runtime->period_size;
 612                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_FORWARD, &frames);
 613                 if (err < 0)
 614                         break;
 615         }
 616         return err;
 617 }
 618
 619 snd_pcm_sframes_t snd_pcm_oss_write3(snd_pcm_substream_t *substream, const char *ptr, snd_pcm_uframes_t frames, int in_kernel)
 620 {
 621         snd_pcm_runtime_t *runtime = substream->runtime;
 622         int ret;
 623         while (1) {
 624                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
 625                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
 626 #ifdef OSS_DEBUG
 627                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
 628                                 printk("pcm_oss: write: recovering from XRUN\n");
 629                         else
 630                                 printk("pcm_oss: write: recovering from SUSPEND\n");
 631 #endif
 632                         ret = snd_pcm_oss_prepare(substream);
 633                         if (ret < 0)
 634                                 break;
 635                 }
 636                 if (in_kernel) {
 637                         mm_segment_t fs;
 638                         fs = snd_enter_user();
 639                         ret = snd_pcm_lib_write(substream, ptr, frames);
 640                         snd_leave_user(fs);
 641                 } else {
 642                         ret = snd_pcm_lib_write(substream, ptr, frames);
 643                 }
 644                 if (ret != -EPIPE && ret != -ESTRPIPE)
 645                         break;
 646                 /* test, if we can't store new data, because the stream */
 647                 /* has not been started */
 648                 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
 649                         return -EAGAIN;
 650         }
 651         return ret;
 652 }
 653
 654 snd_pcm_sframes_t snd_pcm_oss_read3(snd_pcm_substream_t *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
 655 {
 656         snd_pcm_runtime_t *runtime = substream->runtime;
 657         snd_pcm_sframes_t delay;
 658         int ret;
 659         while (1) {
 660                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
 661                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
 662 #ifdef OSS_DEBUG
 663                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
 664                                 printk("pcm_oss: read: recovering from XRUN\n");
 665                         else
 666                                 printk("pcm_oss: read: recovering from SUSPEND\n");
 667 #endif
 668                         ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
 669                         if (ret < 0)
 670                                 break;
 671                 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
 672                         ret = snd_pcm_oss_prepare(substream);
 673                         if (ret < 0)
 674                                 break;
 675                 }
 676                 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
 677                 if (ret < 0)
 678                         break;
 679                 if (in_kernel) {
 680                         mm_segment_t fs;
 681                         fs = snd_enter_user();
 682                         ret = snd_pcm_lib_read(substream, ptr, frames);
 683                         snd_leave_user(fs);
 684                 } else {
 685                         ret = snd_pcm_lib_read(substream, ptr, frames);
 686                 }
 687                 if (ret == -EPIPE) {
 688                         if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
 689                                 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
 690                                 if (ret < 0)
 691                                         break;
 692                         }
 693                         continue;
 694                 }
 695                 if (ret != -ESTRPIPE)
 696                         break;
 697         }
 698         return ret;
 699 }
 700
 701 snd_pcm_sframes_t snd_pcm_oss_writev3(snd_pcm_substream_t *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
 702 {
 703         snd_pcm_runtime_t *runtime = substream->runtime;
 704         int ret;
 705         while (1) {
 706                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
 707                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
 708 #ifdef OSS_DEBUG
 709                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
 710                                 printk("pcm_oss: writev: recovering from XRUN\n");
 711                         else
 712                                 printk("pcm_oss: writev: recovering from SUSPEND\n");
 713 #endif
 714                         ret = snd_pcm_oss_prepare(substream);
 715                         if (ret < 0)
 716                                 break;
 717                 }
 718                 if (in_kernel) {
 719                         mm_segment_t fs;
 720                         fs = snd_enter_user();
 721                         ret = snd_pcm_lib_writev(substream, bufs, frames);
 722                         snd_leave_user(fs);
 723                 } else {
 724                         ret = snd_pcm_lib_writev(substream, bufs, frames);
 725                 }
 726                 if (ret != -EPIPE && ret != -ESTRPIPE)
 727                         break;
 728
 729                 /* test, if we can't store new data, because the stream */
 730                 /* has not been started */
 731                 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
 732                         return -EAGAIN;
 733         }
 734         return ret;
 735 }
 736
 737 snd_pcm_sframes_t snd_pcm_oss_readv3(snd_pcm_substream_t *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
 738 {
 739         snd_pcm_runtime_t *runtime = substream->runtime;
 740         int ret;
 741         while (1) {
 742                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
 743                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
 744 #ifdef OSS_DEBUG
 745                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
 746                                 printk("pcm_oss: readv: recovering from XRUN\n");
 747                         else
 748                                 printk("pcm_oss: readv: recovering from SUSPEND\n");
 749 #endif
 750                         ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
 751                         if (ret < 0)
 752                                 break;
 753                 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
 754                         ret = snd_pcm_oss_prepare(substream);
 755                         if (ret < 0)
 756                                 break;
 757                 }
 758                 if (in_kernel) {
 759                         mm_segment_t fs;
 760                         fs = snd_enter_user();
 761                         ret = snd_pcm_lib_readv(substream, bufs, frames);
 762                         snd_leave_user(fs);
 763                 } else {
 764                         ret = snd_pcm_lib_readv(substream, bufs, frames);
 765                 }
 766                 if (ret != -EPIPE && ret != -ESTRPIPE)
 767                         break;
 768         }
 769         return ret;
 770 }
 771
 772 static ssize_t snd_pcm_oss_write2(snd_pcm_substream_t *substream, const char *buf, size_t bytes, int in_kernel)
 773 {
 774         snd_pcm_runtime_t *runtime = substream->runtime;
 775         snd_pcm_sframes_t frames, frames1;
 776         if (runtime->oss.plugin_first) {
 777                 snd_pcm_plugin_channel_t *channels;
 778                 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
 779                 if (!in_kernel) {
 780                         if (copy_from_user(runtime->oss.buffer, buf, bytes))
 781                                 return -EFAULT;
 782                         buf = runtime->oss.buffer;
 783                 }
 784                 frames = bytes / oss_frame_bytes;
 785                 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
 786                 if (frames1 < 0)
 787                         return frames1;
 788                 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
 789                 if (frames1 <= 0)
 790                         return frames1;
 791                 bytes = frames1 * oss_frame_bytes;
 792         } else {
 793                 frames = bytes_to_frames(runtime, bytes);
 794                 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
 795                 if (frames1 <= 0)
 796                         return frames1;
 797                 bytes = frames_to_bytes(runtime, frames1);
 798         }
 799         return bytes;
 800 }
 801
 802 static ssize_t snd_pcm_oss_write1(snd_pcm_substream_t *substream, const char __user *buf, size_t bytes)
 803 {
 804         size_t xfer = 0;
 805         ssize_t tmp;
 806         snd_pcm_runtime_t *runtime = substream->runtime;
 807
 808         if (atomic_read(&runtime->mmap_count))
 809                 return -ENXIO;
 810
 811         if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
 812                 return tmp;
 813         while (bytes > 0) {
 814                 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
 815                         tmp = bytes;
 816                         if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
 817                                 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
 818                         if (tmp > 0) {
 819                                 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp))
 820                                         return xfer > 0 ? (snd_pcm_sframes_t)xfer : -EFAULT;
 821                         }
 822                         runtime->oss.buffer_used += tmp;
 823                         buf += tmp;
 824                         bytes -= tmp;
 825                         xfer += tmp;
 826                         if ((substream->oss.setup != NULL && substream->oss.setup->partialfrag) ||
 827                             runtime->oss.buffer_used == runtime->oss.period_bytes) {
 828                                 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
 829                                                          runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
 830                                 if (tmp <= 0)
 831                                         return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
 832                                 runtime->oss.bytes += tmp;
 833                                 runtime->oss.period_ptr += tmp;
 834                                 runtime->oss.period_ptr %= runtime->oss.period_bytes;
 835                                 if (runtime->oss.period_ptr == 0 ||
 836                                     runtime->oss.period_ptr == runtime->oss.buffer_used)
 837                                         runtime->oss.buffer_used = 0;
 838                                 else if ((substream->ffile->f_flags & O_NONBLOCK) != 0)
 839                                         return xfer > 0 ? xfer : -EAGAIN;
 840                         }
 841                 } else {
 842                         tmp = snd_pcm_oss_write2(substream, (char *)buf, runtime->oss.period_bytes, 0);
 843                         if (tmp <= 0)
 844                                 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
 845                         runtime->oss.bytes += tmp;
 846                         buf += tmp;
 847                         bytes -= tmp;
 848                         xfer += tmp;
 849                         if ((substream->ffile->f_flags & O_NONBLOCK) != 0 &&
 850                             tmp != runtime->oss.period_bytes)
 851                                 break;
 852                 }
 853         }
 854         return xfer;
 855 }
 856
 857 static ssize_t snd_pcm_oss_read2(snd_pcm_substream_t *substream, char *buf, size_t bytes, int in_kernel)
 858 {
 859         snd_pcm_runtime_t *runtime = substream->runtime;
 860         snd_pcm_sframes_t frames, frames1;
 861         char *final_dst = buf;
 862         if (runtime->oss.plugin_first) {
 863                 snd_pcm_plugin_channel_t *channels;
 864                 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
 865                 if (!in_kernel)
 866                         buf = runtime->oss.buffer;
 867                 frames = bytes / oss_frame_bytes;
 868                 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
 869                 if (frames1 < 0)
 870                         return frames1;
 871                 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
 872                 if (frames1 <= 0)
 873                         return frames1;
 874                 bytes = frames1 * oss_frame_bytes;
 875                 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
 876                         return -EFAULT;
 877         } else {
 878                 frames = bytes_to_frames(runtime, bytes);
 879                 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
 880                 if (frames1 <= 0)
 881                         return frames1;
 882                 bytes = frames_to_bytes(runtime, frames1);
 883         }
 884         return bytes;
 885 }
 886
 887 static ssize_t snd_pcm_oss_read1(snd_pcm_substream_t *substream, char __user *buf, size_t bytes)
 888 {
 889         size_t xfer = 0;
 890         ssize_t tmp;
 891         snd_pcm_runtime_t *runtime = substream->runtime;
 892
 893         if (atomic_read(&runtime->mmap_count))
 894                 return -ENXIO;
 895
 896         if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
 897                 return tmp;
 898         while (bytes > 0) {
 899                 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
 900                         if (runtime->oss.buffer_used == 0) {
 901                                 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
 902                                 if (tmp <= 0)
 903                                         return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
 904                                 runtime->oss.bytes += tmp;
 905                                 runtime->oss.period_ptr = tmp;
 906                                 runtime->oss.buffer_used = tmp;
 907                         }
 908                         tmp = bytes;
 909                         if ((size_t) tmp > runtime->oss.buffer_used)
 910                                 tmp = runtime->oss.buffer_used;
 911                         if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp))
 912                                 return xfer > 0 ? (snd_pcm_sframes_t)xfer : -EFAULT;
 913                         buf += tmp;
 914                         bytes -= tmp;
 915                         xfer += tmp;
 916                         runtime->oss.buffer_used -= tmp;
 917                 } else {
 918                         tmp = snd_pcm_oss_read2(substream, (char *)buf, runtime->oss.period_bytes, 0);
 919                         if (tmp <= 0)
 920                                 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
 921                         runtime->oss.bytes += tmp;
 922                         buf += tmp;
 923                         bytes -= tmp;
 924                         xfer += tmp;
 925                 }
 926         }
 927         return xfer;
 928 }
 929
 930 static int snd_pcm_oss_reset(snd_pcm_oss_file_t *pcm_oss_file)
 931 {
 932         snd_pcm_substream_t *substream;
 933
 934         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
 935         if (substream != NULL) {
 936                 snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
 937                 substream->runtime->oss.prepare = 1;
 938         }
 939         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
 940         if (substream != NULL) {
 941                 snd_pcm_kernel_capture_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
 942                 substream->runtime->oss.prepare = 1;
 943         }
 944         return 0;
 945 }
 946
 947 static int snd_pcm_oss_post(snd_pcm_oss_file_t *pcm_oss_file)
 948 {
 949         snd_pcm_substream_t *substream;
 950         int err;
 951
 952         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
 953         if (substream != NULL) {
 954                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
 955                         return err;
 956                 snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
 957         }
 958         /* note: all errors from the start action are ignored */
 959         /* OSS apps do not know, how to handle them */
 960         return 0;
 961 }
 962
 963 static int snd_pcm_oss_sync1(snd_pcm_substream_t *substream, size_t size)
 964 {
 965         snd_pcm_runtime_t *runtime;
 966         ssize_t result = 0;
 967         long res;
 968         wait_queue_t wait;
 969
 970         runtime = substream->runtime;
 971         init_waitqueue_entry(&wait, current);
 972         add_wait_queue(&runtime->sleep, &wait);
 973 #ifdef OSS_DEBUG
 974         printk("sync1: size = %li\n", size);
 975 #endif
 976         while (1) {
 977                 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
 978                 if (result > 0) {
 979                         runtime->oss.buffer_used = 0;
 980                         result = 0;
 981                         break;
 982                 }
 983                 if (result != 0 && result != -EAGAIN)
 984                         break;
 985                 result = 0;
 986                 set_current_state(TASK_INTERRUPTIBLE);
 987                 snd_pcm_stream_lock_irq(substream);
 988                 res = runtime->status->state;
 989                 snd_pcm_stream_unlock_irq(substream);
 990                 if (res != SNDRV_PCM_STATE_RUNNING) {
 991                         set_current_state(TASK_RUNNING);
 992                         break;
 993                 }
 994                 res = schedule_timeout(10 * HZ);
 995                 if (signal_pending(current)) {
 996                         result = -ERESTARTSYS;
 997                         break;
 998                 }
 999                 if (res == 0) {
1000                         snd_printk(KERN_ERR "OSS sync error - DMA timeout\n");
1001                         result = -EIO;
1002                         break;
1003                 }
1004         }
1005         remove_wait_queue(&runtime->sleep, &wait);
1006         return result;
1007 }
1008
1009 static int snd_pcm_oss_sync(snd_pcm_oss_file_t *pcm_oss_file)
1010 {
1011         int err = 0;
1012         unsigned int saved_f_flags;
1013         snd_pcm_substream_t *substream;
1014         snd_pcm_runtime_t *runtime;
1015         snd_pcm_format_t format;
1016         unsigned long width;
1017         size_t size;
1018
1019         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1020         if (substream != NULL) {
1021                 runtime = substream->runtime;
1022                 if (atomic_read(&runtime->mmap_count))
1023                         goto __direct;
1024                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1025                         return err;
1026                 format = snd_pcm_oss_format_from(runtime->oss.format);
1027                 width = snd_pcm_format_physical_width(format);
1028                 if (runtime->oss.buffer_used > 0) {
1029 #ifdef OSS_DEBUG
1030                         printk("sync: buffer_used\n");
1031 #endif
1032                         size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1033                         snd_pcm_format_set_silence(format,
1034                                                    runtime->oss.buffer + runtime->oss.buffer_used,
1035                                                    size);
1036                         err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1037                         if (err < 0)
1038                                 return err;
1039                 } else if (runtime->oss.period_ptr > 0) {
1040 #ifdef OSS_DEBUG
1041                         printk("sync: period_ptr\n");
1042 #endif
1043                         size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1044                         snd_pcm_format_set_silence(format,
1045                                                    runtime->oss.buffer,
1046                                                    size * 8 / width);
1047                         err = snd_pcm_oss_sync1(substream, size);
1048                         if (err < 0)
1049                                 return err;
1050                 }
1051                 /*
1052                  * The ALSA's period might be a bit large than OSS one.
1053                  * Fill the remain portion of ALSA period with zeros.
1054                  */
1055                 size = runtime->control->appl_ptr % runtime->period_size;
1056                 if (size > 0) {
1057                         size = runtime->period_size - size;
1058                         if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
1059                                 size = (runtime->frame_bits * size) / 8;
1060                                 while (size > 0) {
1061                                         size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes;
1062                                         size -= size1;
1063                                         size1 *= 8;
1064                                         size1 /= runtime->sample_bits;
1065                                         snd_pcm_format_set_silence(runtime->format,
1066                                                                    runtime->oss.buffer,
1067                                                                    size1);
1068                                         snd_pcm_lib_write(substream, runtime->oss.buffer, size1);
1069                                 }
1070                         } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
1071                                 void __user *buffers[runtime->channels];
1072                                 memset(buffers, 0, runtime->channels * sizeof(void *));
1073                                 snd_pcm_lib_writev(substream, buffers, size);
1074                         }
1075                 }
1076                 /*
1077                  * finish sync: drain the buffer
1078                  */
1079               __direct:
1080                 saved_f_flags = substream->ffile->f_flags;
1081                 substream->ffile->f_flags &= ~O_NONBLOCK;
1082                 err = snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1083                 substream->ffile->f_flags = saved_f_flags;
1084                 if (err < 0)
1085                         return err;
1086                 runtime->oss.prepare = 1;
1087         }
1088
1089         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1090         if (substream != NULL) {
1091                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1092                         return err;
1093                 runtime = substream->runtime;
1094                 err = snd_pcm_kernel_capture_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1095                 if (err < 0)
1096                         return err;
1097                 runtime->oss.buffer_used = 0;
1098                 runtime->oss.prepare = 1;
1099         }
1100         return 0;
1101 }
1102
1103 static int snd_pcm_oss_set_rate(snd_pcm_oss_file_t *pcm_oss_file, int rate)
1104 {
1105         int idx;
1106
1107         for (idx = 1; idx >= 0; --idx) {
1108                 snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
1109                 snd_pcm_runtime_t *runtime;
1110                 if (substream == NULL)
1111                         continue;
1112                 runtime = substream->runtime;
1113                 if (rate < 1000)
1114                         rate = 1000;
1115                 else if (rate > 192000)
1116                         rate = 192000;
1117                 if (runtime->oss.rate != rate) {
1118                         runtime->oss.params = 1;
1119                         runtime->oss.rate = rate;
1120                 }
1121         }
1122         return snd_pcm_oss_get_rate(pcm_oss_file);
1123 }
1124
1125 static int snd_pcm_oss_get_rate(snd_pcm_oss_file_t *pcm_oss_file)
1126 {
1127         snd_pcm_substream_t *substream;
1128         int err;
1129
1130         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1131                 return err;
1132         return substream->runtime->oss.rate;
1133 }
1134
1135 static int snd_pcm_oss_set_channels(snd_pcm_oss_file_t *pcm_oss_file, unsigned int channels)
1136 {
1137         int idx;
1138         if (channels < 1)
1139                 channels = 1;
1140         if (channels > 128)
1141                 return -EINVAL;
1142         for (idx = 1; idx >= 0; --idx) {
1143                 snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
1144                 snd_pcm_runtime_t *runtime;
1145                 if (substream == NULL)
1146                         continue;
1147                 runtime = substream->runtime;
1148                 if (runtime->oss.channels != channels) {
1149                         runtime->oss.params = 1;
1150                         runtime->oss.channels = channels;
1151                 }
1152         }
1153         return snd_pcm_oss_get_channels(pcm_oss_file);
1154 }
1155
1156 static int snd_pcm_oss_get_channels(snd_pcm_oss_file_t *pcm_oss_file)
1157 {
1158         snd_pcm_substream_t *substream;
1159         int err;
1160
1161         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1162                 return err;
1163         return substream->runtime->oss.channels;
1164 }
1165
1166 static int snd_pcm_oss_get_block_size(snd_pcm_oss_file_t *pcm_oss_file)
1167 {
1168         snd_pcm_substream_t *substream;
1169         int err;
1170
1171         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1172                 return err;
1173         return substream->runtime->oss.period_bytes;
1174 }
1175
1176 static int snd_pcm_oss_get_formats(snd_pcm_oss_file_t *pcm_oss_file)
1177 {
1178         snd_pcm_substream_t *substream;
1179         int err;
1180         int direct;
1181         snd_pcm_hw_params_t *params;
1182         unsigned int formats = 0;
1183         snd_mask_t format_mask;
1184         int fmt;
1185
1186         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1187                 return err;
1188         if (atomic_read(&substream->runtime->mmap_count)) {
1189                 direct = 1;
1190         } else {
1191                 snd_pcm_oss_setup_t *setup = substream->oss.setup;
1192                 direct = (setup != NULL && setup->direct);
1193         }
1194         if (!direct)
1195                 return AFMT_MU_LAW | AFMT_U8 |
1196                        AFMT_S16_LE | AFMT_S16_BE |
1197                        AFMT_S8 | AFMT_U16_LE |
1198                        AFMT_U16_BE;
1199         params = kmalloc(sizeof(*params), GFP_KERNEL);
1200         if (!params)
1201                 return -ENOMEM;
1202         _snd_pcm_hw_params_any(params);
1203         err = snd_pcm_hw_refine(substream, params);
1204         format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1205         kfree(params);
1206         snd_assert(err >= 0, return err);
1207         for (fmt = 0; fmt < 32; ++fmt) {
1208                 if (snd_mask_test(&format_mask, fmt)) {
1209                         int f = snd_pcm_oss_format_to(fmt);
1210                         if (f >= 0)
1211                                 formats |= f;
1212                 }
1213         }
1214         return formats;
1215 }
1216
1217 static int snd_pcm_oss_set_format(snd_pcm_oss_file_t *pcm_oss_file, int format)
1218 {
1219         int formats, idx;
1220
1221         if (format != AFMT_QUERY) {
1222                 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1223                 if (!(formats & format))
1224                         format = AFMT_U8;
1225                 for (idx = 1; idx >= 0; --idx) {
1226                         snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
1227                         snd_pcm_runtime_t *runtime;
1228                         if (substream == NULL)
1229                                 continue;
1230                         runtime = substream->runtime;
1231                         if (runtime->oss.format != format) {
1232                                 runtime->oss.params = 1;
1233                                 runtime->oss.format = format;
1234                         }
1235                 }
1236         }
1237         return snd_pcm_oss_get_format(pcm_oss_file);
1238 }
1239
1240 static int snd_pcm_oss_get_format(snd_pcm_oss_file_t *pcm_oss_file)
1241 {
1242         snd_pcm_substream_t *substream;
1243         int err;
1244
1245         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1246                 return err;
1247         return substream->runtime->oss.format;
1248 }
1249
1250 static int snd_pcm_oss_set_subdivide1(snd_pcm_substream_t *substream, int subdivide)
1251 {
1252         snd_pcm_runtime_t *runtime;
1253
1254         if (substream == NULL)
1255                 return 0;
1256         runtime = substream->runtime;
1257         if (subdivide == 0) {
1258                 subdivide = runtime->oss.subdivision;
1259                 if (subdivide == 0)
1260                         subdivide = 1;
1261                 return subdivide;
1262         }
1263         if (runtime->oss.subdivision || runtime->oss.fragshift)
1264                 return -EINVAL;
1265         if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1266             subdivide != 8 && subdivide != 16)
1267                 return -EINVAL;
1268         runtime->oss.subdivision = subdivide;
1269         runtime->oss.params = 1;
1270         return subdivide;
1271 }
1272
1273 static int snd_pcm_oss_set_subdivide(snd_pcm_oss_file_t *pcm_oss_file, int subdivide)
1274 {
1275         int err = -EINVAL, idx;
1276
1277         for (idx = 1; idx >= 0; --idx) {
1278                 snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
1279                 if (substream == NULL)
1280                         continue;
1281                 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1282                         return err;
1283         }
1284         return err;
1285 }
1286
1287 static int snd_pcm_oss_set_fragment1(snd_pcm_substream_t *substream, unsigned int val)
1288 {
1289         snd_pcm_runtime_t *runtime;
1290
1291         if (substream == NULL)
1292                 return 0;
1293         runtime = substream->runtime;
1294         if (runtime->oss.subdivision || runtime->oss.fragshift)
1295                 return -EINVAL;
1296         runtime->oss.fragshift = val & 0xffff;
1297         runtime->oss.maxfrags = (val >> 16) & 0xffff;
1298         if (runtime->oss.fragshift < 4)         /* < 16 */
1299                 runtime->oss.fragshift = 4;
1300         if (runtime->oss.maxfrags < 2)
1301                 runtime->oss.maxfrags = 2;
1302         runtime->oss.params = 1;
1303         return 0;
1304 }
1305
1306 static int snd_pcm_oss_set_fragment(snd_pcm_oss_file_t *pcm_oss_file, unsigned int val)
1307 {
1308         int err = -EINVAL, idx;
1309
1310         for (idx = 1; idx >= 0; --idx) {
1311                 snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
1312                 if (substream == NULL)
1313                         continue;
1314                 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1315                         return err;
1316         }
1317         return err;
1318 }
1319
1320 static int snd_pcm_oss_nonblock(struct file * file)
1321 {
1322         file->f_flags |= O_NONBLOCK;
1323         return 0;
1324 }
1325
1326 static int snd_pcm_oss_get_caps1(snd_pcm_substream_t *substream, int res)
1327 {
1328
1329         if (substream == NULL) {
1330                 res &= ~DSP_CAP_DUPLEX;
1331                 return res;
1332         }
1333 #ifdef DSP_CAP_MULTI
1334         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1335                 if (substream->pstr->substream_count > 1)
1336                         res |= DSP_CAP_MULTI;
1337 #endif
1338         /* DSP_CAP_REALTIME is set all times: */
1339         /* all ALSA drivers can return actual pointer in ring buffer */
1340 #if defined(DSP_CAP_REALTIME) && 0
1341         {
1342                 snd_pcm_runtime_t *runtime = substream->runtime;
1343                 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1344                         res &= ~DSP_CAP_REALTIME;
1345         }
1346 #endif
1347         return res;
1348 }
1349
1350 static int snd_pcm_oss_get_caps(snd_pcm_oss_file_t *pcm_oss_file)
1351 {
1352         int result, idx;
1353
1354         result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1355         for (idx = 0; idx < 2; idx++) {
1356                 snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
1357                 result = snd_pcm_oss_get_caps1(substream, result);
1358         }
1359         result |= 0x0001;       /* revision - same as SB AWE 64 */
1360         return result;
1361 }
1362
1363 static void snd_pcm_oss_simulate_fill(snd_pcm_substream_t *substream, snd_pcm_uframes_t hw_ptr)
1364 {
1365         snd_pcm_runtime_t *runtime = substream->runtime;
1366         snd_pcm_uframes_t appl_ptr;
1367         appl_ptr = hw_ptr + runtime->buffer_size;
1368         appl_ptr %= runtime->boundary;
1369         runtime->control->appl_ptr = appl_ptr;
1370 }
1371
1372 static int snd_pcm_oss_set_trigger(snd_pcm_oss_file_t *pcm_oss_file, int trigger)
1373 {
1374         snd_pcm_runtime_t *runtime;
1375         snd_pcm_substream_t *psubstream = NULL, *csubstream = NULL;
1376         int err, cmd;
1377
1378 #ifdef OSS_DEBUG
1379         printk("pcm_oss: trigger = 0x%x\n", trigger);
1380 #endif
1381
1382         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1383         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1384
1385         if (psubstream) {
1386                 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1387                         return err;
1388         }
1389         if (csubstream) {
1390                 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1391                         return err;
1392         }
1393         if (psubstream) {
1394                 runtime = psubstream->runtime;
1395                 if (trigger & PCM_ENABLE_OUTPUT) {
1396                         if (runtime->oss.trigger)
1397                                 goto _skip1;
1398                         if (atomic_read(&psubstream->runtime->mmap_count))
1399                                 snd_pcm_oss_simulate_fill(psubstream, runtime->hw_ptr_interrupt);
1400                         runtime->oss.trigger = 1;
1401                         runtime->start_threshold = 1;
1402                         cmd = SNDRV_PCM_IOCTL_START;
1403                 } else {
1404                         if (!runtime->oss.trigger)
1405                                 goto _skip1;
1406                         runtime->oss.trigger = 0;
1407                         runtime->start_threshold = runtime->boundary;
1408                         cmd = SNDRV_PCM_IOCTL_DROP;
1409                         runtime->oss.prepare = 1;
1410                 }
1411                 err = snd_pcm_kernel_playback_ioctl(psubstream, cmd, NULL);
1412                 if (err < 0)
1413                         return err;
1414         }
1415  _skip1:
1416         if (csubstream) {
1417                 runtime = csubstream->runtime;
1418                 if (trigger & PCM_ENABLE_INPUT) {
1419                         if (runtime->oss.trigger)
1420                                 goto _skip2;
1421                         runtime->oss.trigger = 1;
1422                         runtime->start_threshold = 1;
1423                         cmd = SNDRV_PCM_IOCTL_START;
1424                 } else {
1425                         if (!runtime->oss.trigger)
1426                                 goto _skip2;
1427                         runtime->oss.trigger = 0;
1428                         runtime->start_threshold = runtime->boundary;
1429                         cmd = SNDRV_PCM_IOCTL_DROP;
1430                         runtime->oss.prepare = 1;
1431                 }
1432                 err = snd_pcm_kernel_capture_ioctl(csubstream, cmd, NULL);
1433                 if (err < 0)
1434                         return err;
1435         }
1436  _skip2:
1437         return 0;
1438 }
1439
1440 static int snd_pcm_oss_get_trigger(snd_pcm_oss_file_t *pcm_oss_file)
1441 {
1442         snd_pcm_substream_t *psubstream = NULL, *csubstream = NULL;
1443         int result = 0;
1444
1445         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1446         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1447         if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
1448                 result |= PCM_ENABLE_OUTPUT;
1449         if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
1450                 result |= PCM_ENABLE_INPUT;
1451         return result;
1452 }
1453
1454 static int snd_pcm_oss_get_odelay(snd_pcm_oss_file_t *pcm_oss_file)
1455 {
1456         snd_pcm_substream_t *substream;
1457         snd_pcm_runtime_t *runtime;
1458         snd_pcm_sframes_t delay;
1459         int err;
1460
1461         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1462         if (substream == NULL)
1463                 return -EINVAL;
1464         if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1465                 return err;
1466         runtime = substream->runtime;
1467         if (runtime->oss.params || runtime->oss.prepare)
1468                 return 0;
1469         err = snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
1470         if (err == -EPIPE)
1471                 delay = 0;      /* hack for broken OSS applications */
1472         else if (err < 0)
1473                 return err;
1474         return snd_pcm_oss_bytes(substream, delay);
1475 }
1476
1477 static int snd_pcm_oss_get_ptr(snd_pcm_oss_file_t *pcm_oss_file, int stream, struct count_info __user * _info)
1478 {
1479         snd_pcm_substream_t *substream;
1480         snd_pcm_runtime_t *runtime;
1481         snd_pcm_sframes_t delay;
1482         int fixup;
1483         struct count_info info;
1484         int err;
1485
1486         if (_info == NULL)
1487                 return -EFAULT;
1488         substream = pcm_oss_file->streams[stream];
1489         if (substream == NULL)
1490                 return -EINVAL;
1491         if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1492                 return err;
1493         runtime = substream->runtime;
1494         if (runtime->oss.params || runtime->oss.prepare) {
1495                 memset(&info, 0, sizeof(info));
1496                 if (copy_to_user(_info, &info, sizeof(info)))
1497                         return -EFAULT;
1498                 return 0;
1499         }
1500         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1501                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
1502                 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
1503                         err = 0;
1504                         delay = 0;
1505                         fixup = 0;
1506                 } else {
1507                         fixup = runtime->oss.buffer_used;
1508                 }
1509         } else {
1510                 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
1511                 fixup = -runtime->oss.buffer_used;
1512         }
1513         if (err < 0)
1514                 return err;
1515         info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
1516         if (atomic_read(&runtime->mmap_count)) {
1517                 snd_pcm_sframes_t n;
1518                 n = (delay = runtime->hw_ptr_interrupt) - runtime->oss.prev_hw_ptr_interrupt;
1519                 if (n < 0)
1520                         n += runtime->boundary;
1521                 info.blocks = n / runtime->period_size;
1522                 runtime->oss.prev_hw_ptr_interrupt = delay;
1523                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1524                         snd_pcm_oss_simulate_fill(substream, delay);
1525                 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
1526         } else {
1527                 delay = snd_pcm_oss_bytes(substream, delay) + fixup;
1528                 info.blocks = delay / runtime->oss.period_bytes;
1529                 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1530                         info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
1531                 else
1532                         info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
1533         }
1534         if (copy_to_user(_info, &info, sizeof(info)))
1535                 return -EFAULT;
1536         return 0;
1537 }
1538
1539 static int snd_pcm_oss_get_space(snd_pcm_oss_file_t *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
1540 {
1541         snd_pcm_substream_t *substream;
1542         snd_pcm_runtime_t *runtime;
1543         snd_pcm_sframes_t avail;
1544         int fixup;
1545         struct audio_buf_info info;
1546         int err;
1547
1548         if (_info == NULL)
1549                 return -EFAULT;
1550         substream = pcm_oss_file->streams[stream];
1551         if (substream == NULL)
1552                 return -EINVAL;
1553         runtime = substream->runtime;
1554
1555         if (runtime->oss.params &&
1556             (err = snd_pcm_oss_change_params(substream)) < 0)
1557                 return err;
1558
1559         info.fragsize = runtime->oss.period_bytes;
1560         info.fragstotal = runtime->periods;
1561         if (runtime->oss.prepare) {
1562                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1563                         info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
1564                         info.fragments = runtime->oss.periods;
1565                 } else {
1566                         info.bytes = 0;
1567                         info.fragments = 0;
1568                 }
1569         } else {
1570                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1571                         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
1572                         if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
1573                                 avail = runtime->buffer_size;
1574                                 err = 0;
1575                                 fixup = 0;
1576                         } else {
1577                                 avail = runtime->buffer_size - avail;
1578                                 fixup = -runtime->oss.buffer_used;
1579                         }
1580                 } else {
1581                         err = snd_pcm_oss_capture_position_fixup(substream, &avail);
1582                         fixup = runtime->oss.buffer_used;
1583                 }
1584                 if (err < 0)
1585                         return err;
1586                 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
1587                 info.fragments = info.bytes / runtime->oss.period_bytes;
1588         }
1589
1590 #ifdef OSS_DEBUG
1591         printk("pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n", info.bytes, info.fragments, info.fragstotal, info.fragsize);
1592 #endif
1593         if (copy_to_user(_info, &info, sizeof(info)))
1594                 return -EFAULT;
1595         return 0;
1596 }
1597
1598 static int snd_pcm_oss_get_mapbuf(snd_pcm_oss_file_t *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
1599 {
1600         // it won't be probably implemented
1601         // snd_printd("TODO: snd_pcm_oss_get_mapbuf\n");
1602         return -EINVAL;
1603 }
1604
1605 static snd_pcm_oss_setup_t *snd_pcm_oss_look_for_setup(snd_pcm_t *pcm, int stream, const char *task_name)
1606 {
1607         const char *ptr, *ptrl;
1608         snd_pcm_oss_setup_t *setup;
1609
1610         down(&pcm->streams[stream].oss.setup_mutex);
1611         for (setup = pcm->streams[stream].oss.setup_list; setup; setup = setup->next) {
1612                 if (!strcmp(setup->task_name, task_name)) {
1613                         up(&pcm->streams[stream].oss.setup_mutex);
1614                         return setup;
1615                 }
1616         }
1617         ptr = ptrl = task_name;
1618         while (*ptr) {
1619                 if (*ptr == '/')
1620                         ptrl = ptr + 1;
1621                 ptr++;
1622         }
1623         if (ptrl == task_name) {
1624                 goto __not_found;
1625                 return NULL;
1626         }
1627         for (setup = pcm->streams[stream].oss.setup_list; setup; setup = setup->next) {
1628                 if (!strcmp(setup->task_name, ptrl)) {
1629                         up(&pcm->streams[stream].oss.setup_mutex);
1630                         return setup;
1631                 }
1632         }
1633       __not_found:
1634         up(&pcm->streams[stream].oss.setup_mutex);
1635         return NULL;
1636 }
1637
1638 static void snd_pcm_oss_init_substream(snd_pcm_substream_t *substream,
1639                                        snd_pcm_oss_setup_t *setup,
1640                                        int minor)
1641 {
1642         snd_pcm_runtime_t *runtime;
1643
1644         substream->oss.oss = 1;
1645         substream->oss.setup = setup;
1646         runtime = substream->runtime;
1647         runtime->oss.params = 1;
1648         runtime->oss.trigger = 1;
1649         runtime->oss.rate = 8000;
1650         switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
1651         case SNDRV_MINOR_OSS_PCM_8:
1652                 runtime->oss.format = AFMT_U8;
1653                 break;
1654         case SNDRV_MINOR_OSS_PCM_16:
1655                 runtime->oss.format = AFMT_S16_LE;
1656                 break;
1657         default:
1658                 runtime->oss.format = AFMT_MU_LAW;
1659         }
1660         runtime->oss.channels = 1;
1661         runtime->oss.fragshift = 0;
1662         runtime->oss.maxfrags = 0;
1663         runtime->oss.subdivision = 0;
1664 }
1665
1666 static void snd_pcm_oss_release_substream(snd_pcm_substream_t *substream)
1667 {
1668         snd_pcm_runtime_t *runtime;
1669         runtime = substream->runtime;
1670         vfree(runtime->oss.buffer);
1671         snd_pcm_oss_plugin_clear(substream);
1672         substream->oss.file = NULL;
1673         substream->oss.oss = 0;
1674 }
1675
1676 static int snd_pcm_oss_release_file(snd_pcm_oss_file_t *pcm_oss_file)
1677 {
1678         int cidx;
1679         snd_assert(pcm_oss_file != NULL, return -ENXIO);
1680         for (cidx = 0; cidx < 2; ++cidx) {
1681                 snd_pcm_substream_t *substream = pcm_oss_file->streams[cidx];
1682                 snd_pcm_runtime_t *runtime;
1683                 if (substream == NULL)
1684                         continue;
1685                 runtime = substream->runtime;
1686
1687                 snd_pcm_stream_lock_irq(substream);
1688                 if (snd_pcm_running(substream))
1689                         snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1690                 snd_pcm_stream_unlock_irq(substream);
1691                 if (substream->open_flag) {
1692                         if (substream->ops->hw_free != NULL)
1693                                 substream->ops->hw_free(substream);
1694                         substream->ops->close(substream);
1695                         substream->open_flag = 0;
1696                 }
1697                 substream->ffile = NULL;
1698                 snd_pcm_oss_release_substream(substream);
1699                 snd_pcm_release_substream(substream);
1700         }
1701         kfree(pcm_oss_file);
1702         return 0;
1703 }
1704
1705 static int snd_pcm_oss_open_file(struct file *file,
1706                                  snd_pcm_t *pcm,
1707                                  snd_pcm_oss_file_t **rpcm_oss_file,
1708                                  int minor,
1709                                  snd_pcm_oss_setup_t *psetup,
1710                                  snd_pcm_oss_setup_t *csetup)
1711 {
1712         int err = 0;
1713         snd_pcm_oss_file_t *pcm_oss_file;
1714         snd_pcm_substream_t *psubstream = NULL, *csubstream = NULL;
1715         unsigned int f_mode = file->f_mode;
1716
1717         snd_assert(rpcm_oss_file != NULL, return -EINVAL);
1718         *rpcm_oss_file = NULL;
1719
1720         pcm_oss_file = kcalloc(1, sizeof(*pcm_oss_file), GFP_KERNEL);
1721         if (pcm_oss_file == NULL)
1722                 return -ENOMEM;
1723
1724         if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
1725             (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
1726                 f_mode = FMODE_WRITE;
1727         if ((f_mode & FMODE_WRITE) && !(psetup && psetup->disable)) {
1728                 if ((err = snd_pcm_open_substream(pcm, SNDRV_PCM_STREAM_PLAYBACK,
1729                                                &psubstream)) < 0) {
1730                         snd_pcm_oss_release_file(pcm_oss_file);
1731                         return err;
1732                 }
1733                 pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK] = psubstream;
1734         }
1735         if ((f_mode & FMODE_READ) && !(csetup && csetup->disable)) {
1736                 if ((err = snd_pcm_open_substream(pcm, SNDRV_PCM_STREAM_CAPTURE,
1737                                                &csubstream)) < 0) {
1738                         if (!(f_mode & FMODE_WRITE) || err != -ENODEV) {
1739                                 snd_pcm_oss_release_file(pcm_oss_file);
1740                                 return err;
1741                         } else {
1742                                 csubstream = NULL;
1743                         }
1744                 }
1745                 pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE] = csubstream;
1746         }
1747
1748         if (psubstream == NULL && csubstream == NULL) {
1749                 snd_pcm_oss_release_file(pcm_oss_file);
1750                 return -EINVAL;
1751         }
1752         if (psubstream != NULL) {
1753                 psubstream->oss.file = pcm_oss_file;
1754                 err = snd_pcm_hw_constraints_init(psubstream);
1755                 if (err < 0) {
1756                         snd_printd("snd_pcm_hw_constraint_init failed\n");
1757                         snd_pcm_oss_release_file(pcm_oss_file);
1758                         return err;
1759                 }
1760                 if ((err = psubstream->ops->open(psubstream)) < 0) {
1761                         snd_pcm_oss_release_file(pcm_oss_file);
1762                         return err;
1763                 }
1764                 psubstream->open_flag = 1;
1765                 err = snd_pcm_hw_constraints_complete(psubstream);
1766                 if (err < 0) {
1767                         snd_printd("snd_pcm_hw_constraint_complete failed\n");
1768                         snd_pcm_oss_release_file(pcm_oss_file);
1769                         return err;
1770                 }
1771                 psubstream->ffile = file;
1772                 snd_pcm_oss_init_substream(psubstream, psetup, minor);
1773         }
1774         if (csubstream != NULL) {
1775                 csubstream->oss.file = pcm_oss_file;
1776                 err = snd_pcm_hw_constraints_init(csubstream);
1777                 if (err < 0) {
1778                         snd_printd("snd_pcm_hw_constraint_init failed\n");
1779                         snd_pcm_oss_release_file(pcm_oss_file);
1780                         return err;
1781                 }
1782                 if ((err = csubstream->ops->open(csubstream)) < 0) {
1783                         snd_pcm_oss_release_file(pcm_oss_file);
1784                         return err;
1785                 }
1786                 csubstream->open_flag = 1;
1787                 err = snd_pcm_hw_constraints_complete(csubstream);
1788                 if (err < 0) {
1789                         snd_printd("snd_pcm_hw_constraint_complete failed\n");
1790                         snd_pcm_oss_release_file(pcm_oss_file);
1791                         return err;
1792                 }
1793                 csubstream->ffile = file;
1794                 snd_pcm_oss_init_substream(csubstream, csetup, minor);
1795         }
1796
1797         file->private_data = pcm_oss_file;
1798         *rpcm_oss_file = pcm_oss_file;
1799         return 0;
1800 }
1801
1802
1803 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
1804 {
1805         int minor = iminor(inode);
1806         int cardnum = SNDRV_MINOR_OSS_CARD(minor);
1807         int device;
1808         int err;
1809         char task_name[32];
1810         snd_pcm_t *pcm;
1811         snd_pcm_oss_file_t *pcm_oss_file;
1812         snd_pcm_oss_setup_t *psetup = NULL, *csetup = NULL;
1813         int nonblock;
1814         wait_queue_t wait;
1815
1816         snd_assert(cardnum >= 0 && cardnum < SNDRV_CARDS, return -ENXIO);
1817         device = SNDRV_MINOR_OSS_DEVICE(minor) == SNDRV_MINOR_OSS_PCM1 ?
1818                 adsp_map[cardnum] : dsp_map[cardnum];
1819
1820         pcm = snd_pcm_devices[(cardnum * SNDRV_PCM_DEVICES) + device];
1821         if (pcm == NULL) {
1822                 err = -ENODEV;
1823                 goto __error1;
1824         }
1825         err = snd_card_file_add(pcm->card, file);
1826         if (err < 0)
1827                 goto __error1;
1828         if (!try_module_get(pcm->card->module)) {
1829                 err = -EFAULT;
1830                 goto __error2;
1831         }
1832         if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
1833                 err = -EFAULT;
1834                 goto __error;
1835         }
1836         if (file->f_mode & FMODE_WRITE)
1837                 psetup = snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK, task_name);
1838         if (file->f_mode & FMODE_READ)
1839                 csetup = snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE, task_name);
1840
1841         nonblock = !!(file->f_flags & O_NONBLOCK);
1842         if (psetup && !psetup->disable) {
1843                 if (psetup->nonblock)
1844                         nonblock = 1;
1845                 else if (psetup->block)
1846                         nonblock = 0;
1847         } else if (csetup && !csetup->disable) {
1848                 if (csetup->nonblock)
1849                         nonblock = 1;
1850                 else if (csetup->block)
1851                         nonblock = 0;
1852         }
1853         if (!nonblock)
1854                 nonblock = nonblock_open;
1855
1856         init_waitqueue_entry(&wait, current);
1857         add_wait_queue(&pcm->open_wait, &wait);
1858         down(&pcm->open_mutex);
1859         while (1) {
1860                 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
1861                                             minor, psetup, csetup);
1862                 if (err >= 0)
1863                         break;
1864                 if (err == -EAGAIN) {
1865                         if (nonblock) {
1866                                 err = -EBUSY;
1867                                 break;
1868                         }
1869                 } else
1870                         break;
1871                 set_current_state(TASK_INTERRUPTIBLE);
1872                 up(&pcm->open_mutex);
1873                 schedule();
1874                 down(&pcm->open_mutex);
1875                 if (signal_pending(current)) {
1876                         err = -ERESTARTSYS;
1877                         break;
1878                 }
1879         }
1880         remove_wait_queue(&pcm->open_wait, &wait);
1881         up(&pcm->open_mutex);
1882         if (err < 0)
1883                 goto __error;
1884         return err;
1885
1886       __error:
1887         module_put(pcm->card->module);
1888       __error2:
1889         snd_card_file_remove(pcm->card, file);
1890       __error1:
1891         return err;
1892 }
1893
1894 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
1895 {
1896         snd_pcm_t *pcm;
1897         snd_pcm_substream_t *substream;
1898         snd_pcm_oss_file_t *pcm_oss_file;
1899
1900         pcm_oss_file = file->private_data;
1901         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1902         if (substream == NULL)
1903                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1904         snd_assert(substream != NULL, return -ENXIO);
1905         pcm = substream->pcm;
1906         snd_pcm_oss_sync(pcm_oss_file);
1907         down(&pcm->open_mutex);
1908         snd_pcm_oss_release_file(pcm_oss_file);
1909         up(&pcm->open_mutex);
1910         wake_up(&pcm->open_wait);
1911         module_put(pcm->card->module);
1912         snd_card_file_remove(pcm->card, file);
1913         return 0;
1914 }
1915
1916 static inline int _snd_pcm_oss_ioctl(struct inode *inode, struct file *file,
1917                                      unsigned int cmd, unsigned long arg)
1918 {
1919         snd_pcm_oss_file_t *pcm_oss_file;
1920         int __user *p = (int __user *)arg;
1921         int res;
1922
1923         pcm_oss_file = file->private_data;
1924         if (cmd == OSS_GETVERSION)
1925                 return put_user(SNDRV_OSS_VERSION, p);
1926         if (cmd == OSS_ALSAEMULVER)
1927                 return put_user(1, p);
1928 #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE))
1929         if (((cmd >> 8) & 0xff) == 'M') {       /* mixer ioctl - for OSS compatibility */
1930                 snd_pcm_substream_t *substream;
1931                 int idx;
1932                 for (idx = 0; idx < 2; ++idx) {
1933                         substream = pcm_oss_file->streams[idx];
1934                         if (substream != NULL)
1935                                 break;
1936                 }
1937                 snd_assert(substream != NULL, return -ENXIO);
1938                 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
1939         }
1940 #endif
1941         if (((cmd >> 8) & 0xff) != 'P')
1942                 return -EINVAL;
1943 #ifdef OSS_DEBUG
1944         printk("pcm_oss: ioctl = 0x%x\n", cmd);
1945 #endif
1946         switch (cmd) {
1947         case SNDCTL_DSP_RESET:
1948                 return snd_pcm_oss_reset(pcm_oss_file);
1949         case SNDCTL_DSP_SYNC:
1950                 return snd_pcm_oss_sync(pcm_oss_file);
1951         case SNDCTL_DSP_SPEED:
1952                 if (get_user(res, p))
1953                         return -EFAULT;
1954                 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
1955                         return res;
1956                 return put_user(res, p);
1957         case SOUND_PCM_READ_RATE:
1958                 res = snd_pcm_oss_get_rate(pcm_oss_file);
1959                 if (res < 0)
1960                         return res;
1961                 return put_user(res, p);
1962         case SNDCTL_DSP_STEREO:
1963                 if (get_user(res, p))
1964                         return -EFAULT;
1965                 res = res > 0 ? 2 : 1;
1966                 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
1967                         return res;
1968                 return put_user(--res, p);
1969         case SNDCTL_DSP_GETBLKSIZE:
1970                 res = snd_pcm_oss_get_block_size(pcm_oss_file);
1971                 if (res < 0)
1972                         return res;
1973                 return put_user(res, p);
1974         case SNDCTL_DSP_SETFMT:
1975                 if (get_user(res, p))
1976                         return -EFAULT;
1977                 res = snd_pcm_oss_set_format(pcm_oss_file, res);
1978                 if (res < 0)
1979                         return res;
1980                 return put_user(res, p);
1981         case SOUND_PCM_READ_BITS:
1982                 res = snd_pcm_oss_get_format(pcm_oss_file);
1983                 if (res < 0)
1984                         return res;
1985                 return put_user(res, p);
1986         case SNDCTL_DSP_CHANNELS:
1987                 if (get_user(res, p))
1988                         return -EFAULT;
1989                 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
1990                 if (res < 0)
1991                         return res;
1992                 return put_user(res, p);
1993         case SOUND_PCM_READ_CHANNELS:
1994                 res = snd_pcm_oss_get_channels(pcm_oss_file);
1995                 if (res < 0)
1996                         return res;
1997                 return put_user(res, p);
1998         case SOUND_PCM_WRITE_FILTER:
1999         case SOUND_PCM_READ_FILTER:
2000                 return -EIO;
2001         case SNDCTL_DSP_POST:
2002                 return snd_pcm_oss_post(pcm_oss_file);
2003         case SNDCTL_DSP_SUBDIVIDE:
2004                 if (get_user(res, p))
2005                         return -EFAULT;
2006                 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2007                 if (res < 0)
2008                         return res;
2009                 return put_user(res, p);
2010         case SNDCTL_DSP_SETFRAGMENT:
2011                 if (get_user(res, p))
2012                         return -EFAULT;
2013                 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2014         case SNDCTL_DSP_GETFMTS:
2015                 res = snd_pcm_oss_get_formats(pcm_oss_file);
2016                 if (res < 0)
2017                         return res;
2018                 return put_user(res, p);
2019         case SNDCTL_DSP_GETOSPACE:
2020         case SNDCTL_DSP_GETISPACE:
2021                 return snd_pcm_oss_get_space(pcm_oss_file,
2022                         cmd == SNDCTL_DSP_GETISPACE ?
2023                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2024                         (struct audio_buf_info __user *) arg);
2025         case SNDCTL_DSP_NONBLOCK:
2026                 return snd_pcm_oss_nonblock(file);
2027         case SNDCTL_DSP_GETCAPS:
2028                 res = snd_pcm_oss_get_caps(pcm_oss_file);
2029                 if (res < 0)
2030                         return res;
2031                 return put_user(res, p);
2032         case SNDCTL_DSP_GETTRIGGER:
2033                 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2034                 if (res < 0)
2035                         return res;
2036                 return put_user(res, p);
2037         case SNDCTL_DSP_SETTRIGGER:
2038                 if (get_user(res, p))
2039                         return -EFAULT;
2040                 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2041         case SNDCTL_DSP_GETIPTR:
2042         case SNDCTL_DSP_GETOPTR:
2043                 return snd_pcm_oss_get_ptr(pcm_oss_file,
2044                         cmd == SNDCTL_DSP_GETIPTR ?
2045                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2046                         (struct count_info __user *) arg);
2047         case SNDCTL_DSP_MAPINBUF:
2048         case SNDCTL_DSP_MAPOUTBUF:
2049                 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2050                         cmd == SNDCTL_DSP_MAPINBUF ?
2051                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2052                         (struct buffmem_desc __user *) arg);
2053         case SNDCTL_DSP_SETSYNCRO:
2054                 /* stop DMA now.. */
2055                 return 0;
2056         case SNDCTL_DSP_SETDUPLEX:
2057                 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2058                         return 0;
2059                 return -EIO;
2060         case SNDCTL_DSP_GETODELAY:
2061                 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2062                 if (res < 0) {
2063                         /* it's for sure, some broken apps don't check for error codes */
2064                         put_user(0, p);
2065                         return res;
2066                 }
2067                 return put_user(res, p);
2068         case SNDCTL_DSP_PROFILE:
2069                 return 0;       /* silently ignore */
2070         default:
2071                 snd_printd("pcm_oss: unknown command = 0x%x\n", cmd);
2072         }
2073         return -EINVAL;
2074 }
2075
2076 /* FIXME: need to unlock BKL to allow preemption */
2077 static int snd_pcm_oss_ioctl(struct inode *inode, struct file *file,
2078                              unsigned int cmd, unsigned long arg)
2079 {
2080         int err;
2081         unlock_kernel();
2082         err = _snd_pcm_oss_ioctl(inode, file, cmd, arg);
2083         lock_kernel();
2084         return err;
2085 }
2086
2087 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2088 {
2089         snd_pcm_oss_file_t *pcm_oss_file;
2090         snd_pcm_substream_t *substream;
2091
2092         pcm_oss_file = file->private_data;
2093         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2094         if (substream == NULL)
2095                 return -ENXIO;
2096 #ifndef OSS_DEBUG
2097         return snd_pcm_oss_read1(substream, buf, count);
2098 #else
2099         {
2100                 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2101                 printk("pcm_oss: read %li bytes (returned %li bytes)\n", (long)count, (long)res);
2102                 return res;
2103         }
2104 #endif
2105 }
2106
2107 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2108 {
2109         snd_pcm_oss_file_t *pcm_oss_file;
2110         snd_pcm_substream_t *substream;
2111         long result;
2112
2113         pcm_oss_file = file->private_data;
2114         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2115         if (substream == NULL)
2116                 return -ENXIO;
2117         up(&file->f_dentry->d_inode->i_sem);
2118         result = snd_pcm_oss_write1(substream, buf, count);
2119         down(&file->f_dentry->d_inode->i_sem);
2120 #ifdef OSS_DEBUG
2121         printk("pcm_oss: write %li bytes (wrote %li bytes)\n", (long)count, (long)result);
2122 #endif
2123         return result;
2124 }
2125
2126 static int snd_pcm_oss_playback_ready(snd_pcm_substream_t *substream)
2127 {
2128         snd_pcm_runtime_t *runtime = substream->runtime;
2129         if (atomic_read(&runtime->mmap_count))
2130                 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2131         else
2132                 return snd_pcm_playback_avail(runtime) >= runtime->oss.period_frames;
2133 }
2134
2135 static int snd_pcm_oss_capture_ready(snd_pcm_substream_t *substream)
2136 {
2137         snd_pcm_runtime_t *runtime = substream->runtime;
2138         if (atomic_read(&runtime->mmap_count))
2139                 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2140         else
2141                 return snd_pcm_capture_avail(runtime) >= runtime->oss.period_frames;
2142 }
2143
2144 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2145 {
2146         snd_pcm_oss_file_t *pcm_oss_file;
2147         unsigned int mask;
2148         snd_pcm_substream_t *psubstream = NULL, *csubstream = NULL;
2149
2150         pcm_oss_file = file->private_data;
2151
2152         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2153         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2154
2155         mask = 0;
2156         if (psubstream != NULL) {
2157                 snd_pcm_runtime_t *runtime = psubstream->runtime;
2158                 poll_wait(file, &runtime->sleep, wait);
2159                 snd_pcm_stream_lock_irq(psubstream);
2160                 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2161                     (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2162                      snd_pcm_oss_playback_ready(psubstream)))
2163                         mask |= POLLOUT | POLLWRNORM;
2164                 snd_pcm_stream_unlock_irq(psubstream);
2165         }
2166         if (csubstream != NULL) {
2167                 snd_pcm_runtime_t *runtime = csubstream->runtime;
2168                 enum sndrv_pcm_state ostate;
2169                 poll_wait(file, &runtime->sleep, wait);
2170                 snd_pcm_stream_lock_irq(csubstream);
2171                 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2172                     snd_pcm_oss_capture_ready(csubstream))
2173                         mask |= POLLIN | POLLRDNORM;
2174                 snd_pcm_stream_unlock_irq(csubstream);
2175                 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2176                         snd_pcm_oss_file_t ofile;
2177                         memset(&ofile, 0, sizeof(ofile));
2178                         ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2179                         runtime->oss.trigger = 0;
2180                         snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2181                 }
2182         }
2183
2184         return mask;
2185 }
2186
2187 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2188 {
2189         snd_pcm_oss_file_t *pcm_oss_file;
2190         snd_pcm_substream_t *substream = NULL;
2191         snd_pcm_runtime_t *runtime;
2192         int err;
2193
2194 #ifdef OSS_DEBUG
2195         printk("pcm_oss: mmap begin\n");
2196 #endif
2197         pcm_oss_file = file->private_data;
2198         switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2199         case VM_READ | VM_WRITE:
2200                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2201                 if (substream)
2202                         break;
2203                 /* Fall through */
2204         case VM_READ:
2205                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2206                 break;
2207         case VM_WRITE:
2208                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2209                 break;
2210         default:
2211                 return -EINVAL;
2212         }
2213         /* set VM_READ access as well to fix memset() routines that do
2214            reads before writes (to improve performance) */
2215         area->vm_flags |= VM_READ;
2216         if (substream == NULL)
2217                 return -ENXIO;
2218         runtime = substream->runtime;
2219         if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2220                 return -EIO;
2221         if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2222                 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2223         else
2224                 return -EIO;
2225
2226         if (runtime->oss.params) {
2227                 if ((err = snd_pcm_oss_change_params(substream)) < 0)
2228                         return err;
2229         }
2230         if (runtime->oss.plugin_first != NULL)
2231                 return -EIO;
2232
2233         if (area->vm_pgoff != 0)
2234                 return -EINVAL;
2235
2236         err = snd_pcm_mmap_data(substream, file, area);
2237         if (err < 0)
2238                 return err;
2239         runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2240         runtime->silence_threshold = 0;
2241         runtime->silence_size = 0;
2242 #ifdef OSS_DEBUG
2243         printk("pcm_oss: mmap ok, bytes = 0x%x\n", runtime->oss.mmap_bytes);
2244 #endif
2245         /* In mmap mode we never stop */
2246         runtime->stop_threshold = runtime->boundary;
2247
2248         return 0;
2249 }
2250
2251 /*
2252  *  /proc interface
2253  */
2254
2255 static void snd_pcm_oss_proc_read(snd_info_entry_t *entry,
2256                                   snd_info_buffer_t * buffer)
2257 {
2258         snd_pcm_str_t *pstr = (snd_pcm_str_t *)entry->private_data;
2259         snd_pcm_oss_setup_t *setup = pstr->oss.setup_list;
2260         down(&pstr->oss.setup_mutex);
2261         while (setup) {
2262                 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2263                             setup->task_name,
2264                             setup->periods,
2265                             setup->period_size,
2266                             setup->disable ? " disable" : "",
2267                             setup->direct ? " direct" : "",
2268                             setup->block ? " block" : "",
2269                             setup->nonblock ? " non-block" : "",
2270                             setup->partialfrag ? " partial-frag" : "",
2271                             setup->nosilence ? " no-silence" : "");
2272                 setup = setup->next;
2273         }
2274         up(&pstr->oss.setup_mutex);
2275 }
2276
2277 static void snd_pcm_oss_proc_free_setup_list(snd_pcm_str_t * pstr)
2278 {
2279         unsigned int idx;
2280         snd_pcm_substream_t *substream;
2281         snd_pcm_oss_setup_t *setup, *setupn;
2282
2283         for (idx = 0, substream = pstr->substream;
2284              idx < pstr->substream_count; idx++, substream = substream->next)
2285                 substream->oss.setup = NULL;
2286         for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2287              setup; setup = setupn) {
2288                 setupn = setup->next;
2289                 kfree(setup->task_name);
2290                 kfree(setup);
2291         }
2292         pstr->oss.setup_list = NULL;
2293 }
2294
2295 static void snd_pcm_oss_proc_write(snd_info_entry_t *entry,
2296                                    snd_info_buffer_t * buffer)
2297 {
2298         snd_pcm_str_t *pstr = (snd_pcm_str_t *)entry->private_data;
2299         char line[256], str[32], task_name[32], *ptr;
2300         int idx1;
2301         snd_pcm_oss_setup_t *setup, *setup1, template;
2302
2303         while (!snd_info_get_line(buffer, line, sizeof(line))) {
2304                 down(&pstr->oss.setup_mutex);
2305                 memset(&template, 0, sizeof(template));
2306                 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2307                 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2308                         snd_pcm_oss_proc_free_setup_list(pstr);
2309                         up(&pstr->oss.setup_mutex);
2310                         continue;
2311                 }
2312                 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2313                         if (!strcmp(setup->task_name, task_name)) {
2314                                 template = *setup;
2315                                 break;
2316                         }
2317                 }
2318                 ptr = snd_info_get_str(str, ptr, sizeof(str));
2319                 template.periods = simple_strtoul(str, NULL, 10);
2320                 ptr = snd_info_get_str(str, ptr, sizeof(str));
2321                 template.period_size = simple_strtoul(str, NULL, 10);
2322                 for (idx1 = 31; idx1 >= 0; idx1--)
2323                         if (template.period_size & (1 << idx1))
2324                                 break;
2325                 for (idx1--; idx1 >= 0; idx1--)
2326                         template.period_size &= ~(1 << idx1);
2327                 do {
2328                         ptr = snd_info_get_str(str, ptr, sizeof(str));
2329                         if (!strcmp(str, "disable")) {
2330                                 template.disable = 1;
2331                         } else if (!strcmp(str, "direct")) {
2332                                 template.direct = 1;
2333                         } else if (!strcmp(str, "block")) {
2334                                 template.block = 1;
2335                         } else if (!strcmp(str, "non-block")) {
2336                                 template.nonblock = 1;
2337                         } else if (!strcmp(str, "partial-frag")) {
2338                                 template.partialfrag = 1;
2339                         } else if (!strcmp(str, "no-silence")) {
2340                                 template.nosilence = 1;
2341                         }
2342                 } while (*str);
2343                 if (setup == NULL) {
2344                         setup = (snd_pcm_oss_setup_t *) kmalloc(sizeof(snd_pcm_oss_setup_t), GFP_KERNEL);
2345                         if (setup) {
2346                                 if (pstr->oss.setup_list == NULL) {
2347                                         pstr->oss.setup_list = setup;
2348                                 } else {
2349                                         for (setup1 = pstr->oss.setup_list; setup1->next; setup1 = setup1->next);
2350                                         setup1->next = setup;
2351                                 }
2352                                 template.task_name = snd_kmalloc_strdup(task_name, GFP_KERNEL);
2353                         } else {
2354                                 buffer->error = -ENOMEM;
2355                         }
2356                 }
2357                 if (setup)
2358                         *setup = template;
2359                 up(&pstr->oss.setup_mutex);
2360         }
2361 }
2362
2363 static void snd_pcm_oss_proc_init(snd_pcm_t *pcm)
2364 {
2365         int stream;
2366         for (stream = 0; stream < 2; ++stream) {
2367                 snd_info_entry_t *entry;
2368                 snd_pcm_str_t *pstr = &pcm->streams[stream];
2369                 if (pstr->substream_count == 0)
2370                         continue;
2371                 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2372                         entry->content = SNDRV_INFO_CONTENT_TEXT;
2373                         entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
2374                         entry->c.text.read_size = 8192;
2375                         entry->c.text.read = snd_pcm_oss_proc_read;
2376                         entry->c.text.write_size = 8192;
2377                         entry->c.text.write = snd_pcm_oss_proc_write;
2378                         entry->private_data = pstr;
2379                         if (snd_info_register(entry) < 0) {
2380                                 snd_info_free_entry(entry);
2381                                 entry = NULL;
2382                         }
2383                 }
2384                 pstr->oss.proc_entry = entry;
2385         }
2386 }
2387
2388 static void snd_pcm_oss_proc_done(snd_pcm_t *pcm)
2389 {
2390         int stream;
2391         for (stream = 0; stream < 2; ++stream) {
2392                 snd_pcm_str_t *pstr = &pcm->streams[stream];
2393                 if (pstr->oss.proc_entry) {
2394                         snd_info_unregister(pstr->oss.proc_entry);
2395                         pstr->oss.proc_entry = NULL;
2396                         snd_pcm_oss_proc_free_setup_list(pstr);
2397                 }
2398         }
2399 }
2400
2401 /*
2402  *  ENTRY functions
2403  */
2404
2405 static struct file_operations snd_pcm_oss_f_reg =
2406 {
2407         .owner =        THIS_MODULE,
2408         .read =         snd_pcm_oss_read,
2409         .write =        snd_pcm_oss_write,
2410         .open =         snd_pcm_oss_open,
2411         .release =      snd_pcm_oss_release,
2412         .poll =         snd_pcm_oss_poll,
2413         .ioctl =        snd_pcm_oss_ioctl,
2414         .mmap =         snd_pcm_oss_mmap,
2415 };
2416
2417 static snd_minor_t snd_pcm_oss_reg =
2418 {
2419         .comment =      "digital audio",
2420         .f_ops =        &snd_pcm_oss_f_reg,
2421 };
2422
2423 static void register_oss_dsp(snd_pcm_t *pcm, int index)
2424 {
2425         char name[128];
2426         sprintf(name, "dsp%i%i", pcm->card->number, pcm->device);
2427         if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2428                                     pcm->card, index, &snd_pcm_oss_reg,
2429                                     name) < 0) {
2430                 snd_printk("unable to register OSS PCM device %i:%i\n", pcm->card->number, pcm->device);
2431         }
2432 }
2433
2434 static int snd_pcm_oss_register_minor(snd_pcm_t * pcm)
2435 {
2436         pcm->oss.reg = 0;
2437         if (dsp_map[pcm->card->number] == (int)pcm->device) {
2438                 char name[128];
2439                 int duplex;
2440                 register_oss_dsp(pcm, 0);
2441                 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
2442                               pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
2443                               !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
2444                 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
2445 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
2446                 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
2447                                       pcm->card->number,
2448                                       name);
2449 #endif
2450                 pcm->oss.reg++;
2451                 pcm->oss.reg_mask |= 1;
2452         }
2453         if (adsp_map[pcm->card->number] == (int)pcm->device) {
2454                 register_oss_dsp(pcm, 1);
2455                 pcm->oss.reg++;
2456                 pcm->oss.reg_mask |= 2;
2457         }
2458
2459         if (pcm->oss.reg)
2460                 snd_pcm_oss_proc_init(pcm);
2461
2462         return 0;
2463 }
2464
2465 static int snd_pcm_oss_disconnect_minor(snd_pcm_t * pcm)
2466 {
2467         if (pcm->oss.reg) {
2468                 if (pcm->oss.reg_mask & 1) {
2469                         pcm->oss.reg_mask &= ~1;
2470                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2471                                                   pcm->card, 0);
2472                 }
2473                 if (pcm->oss.reg_mask & 2) {
2474                         pcm->oss.reg_mask &= ~2;
2475                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2476                                                   pcm->card, 1);
2477                 }
2478         }
2479         return 0;
2480 }
2481
2482 static int snd_pcm_oss_unregister_minor(snd_pcm_t * pcm)
2483 {
2484         snd_pcm_oss_disconnect_minor(pcm);
2485         if (pcm->oss.reg) {
2486                 if (dsp_map[pcm->card->number] == (int)pcm->device) {
2487 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
2488                         snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
2489 #endif
2490                 }
2491                 pcm->oss.reg = 0;
2492                 snd_pcm_oss_proc_done(pcm);
2493         }
2494         return 0;
2495 }
2496
2497 static snd_pcm_notify_t snd_pcm_oss_notify =
2498 {
2499         .n_register =   snd_pcm_oss_register_minor,
2500         .n_disconnect = snd_pcm_oss_disconnect_minor,
2501         .n_unregister = snd_pcm_oss_unregister_minor,
2502 };
2503
2504 static int __init alsa_pcm_oss_init(void)
2505 {
2506         int i;
2507         int err;
2508
2509         /* check device map table */
2510         for (i = 0; i < SNDRV_CARDS; i++) {
2511                 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
2512                         snd_printk("invalid dsp_map[%d] = %d\n", i, dsp_map[i]);
2513                         dsp_map[i] = 0;
2514                 }
2515                 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
2516                         snd_printk("invalid adsp_map[%d] = %d\n", i, adsp_map[i]);
2517                         adsp_map[i] = 1;
2518                 }
2519         }
2520         if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
2521                 return err;
2522         return 0;
2523 }
2524
2525 static void __exit alsa_pcm_oss_exit(void)
2526 {
2527         snd_pcm_notify(&snd_pcm_oss_notify, 1);
2528 }
2529
2530 module_init(alsa_pcm_oss_init)
2531 module_exit(alsa_pcm_oss_exit)