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, (void __user *)ptr, frames);
 640                         snd_leave_user(fs);
 641                 } else {
 642                         ret = snd_pcm_lib_write(substream, (void __user *)ptr, frames);
 643                 }
 644                 if (ret != -EPIPE && ret != -ESTRPIPE)
 645                         break;
 646                 /* test, if we can't store new data, because the stream */
 647                 /* has not been started */
 648                 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
 649                         return -EAGAIN;
 650         }
 651         return ret;
 652 }
 653
 654 snd_pcm_sframes_t snd_pcm_oss_read3(snd_pcm_substream_t *substream, char *ptr, snd_pcm_uframes_t frames, int in_kernel)
 655 {
 656         snd_pcm_runtime_t *runtime = substream->runtime;
 657         snd_pcm_sframes_t delay;
 658         int ret;
 659         while (1) {
 660                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
 661                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
 662 #ifdef OSS_DEBUG
 663                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
 664                                 printk("pcm_oss: read: recovering from XRUN\n");
 665                         else
 666                                 printk("pcm_oss: read: recovering from SUSPEND\n");
 667 #endif
 668                         ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
 669                         if (ret < 0)
 670                                 break;
 671                 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
 672                         ret = snd_pcm_oss_prepare(substream);
 673                         if (ret < 0)
 674                                 break;
 675                 }
 676                 ret = snd_pcm_oss_capture_position_fixup(substream, &delay);
 677                 if (ret < 0)
 678                         break;
 679                 if (in_kernel) {
 680                         mm_segment_t fs;
 681                         fs = snd_enter_user();
 682                         ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
 683                         snd_leave_user(fs);
 684                 } else {
 685                         ret = snd_pcm_lib_read(substream, (void __user *)ptr, frames);
 686                 }
 687                 if (ret == -EPIPE) {
 688                         if (runtime->status->state == SNDRV_PCM_STATE_DRAINING) {
 689                                 ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
 690                                 if (ret < 0)
 691                                         break;
 692                         }
 693                         continue;
 694                 }
 695                 if (ret != -ESTRPIPE)
 696                         break;
 697         }
 698         return ret;
 699 }
 700
 701 snd_pcm_sframes_t snd_pcm_oss_writev3(snd_pcm_substream_t *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
 702 {
 703         snd_pcm_runtime_t *runtime = substream->runtime;
 704         int ret;
 705         while (1) {
 706                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
 707                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
 708 #ifdef OSS_DEBUG
 709                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
 710                                 printk("pcm_oss: writev: recovering from XRUN\n");
 711                         else
 712                                 printk("pcm_oss: writev: recovering from SUSPEND\n");
 713 #endif
 714                         ret = snd_pcm_oss_prepare(substream);
 715                         if (ret < 0)
 716                                 break;
 717                 }
 718                 if (in_kernel) {
 719                         mm_segment_t fs;
 720                         fs = snd_enter_user();
 721                         ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
 722                         snd_leave_user(fs);
 723                 } else {
 724                         ret = snd_pcm_lib_writev(substream, (void __user **)bufs, frames);
 725                 }
 726                 if (ret != -EPIPE && ret != -ESTRPIPE)
 727                         break;
 728
 729                 /* test, if we can't store new data, because the stream */
 730                 /* has not been started */
 731                 if (runtime->status->state == SNDRV_PCM_STATE_PREPARED)
 732                         return -EAGAIN;
 733         }
 734         return ret;
 735 }
 736
 737 snd_pcm_sframes_t snd_pcm_oss_readv3(snd_pcm_substream_t *substream, void **bufs, snd_pcm_uframes_t frames, int in_kernel)
 738 {
 739         snd_pcm_runtime_t *runtime = substream->runtime;
 740         int ret;
 741         while (1) {
 742                 if (runtime->status->state == SNDRV_PCM_STATE_XRUN ||
 743                     runtime->status->state == SNDRV_PCM_STATE_SUSPENDED) {
 744 #ifdef OSS_DEBUG
 745                         if (runtime->status->state == SNDRV_PCM_STATE_XRUN)
 746                                 printk("pcm_oss: readv: recovering from XRUN\n");
 747                         else
 748                                 printk("pcm_oss: readv: recovering from SUSPEND\n");
 749 #endif
 750                         ret = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
 751                         if (ret < 0)
 752                                 break;
 753                 } else if (runtime->status->state == SNDRV_PCM_STATE_SETUP) {
 754                         ret = snd_pcm_oss_prepare(substream);
 755                         if (ret < 0)
 756                                 break;
 757                 }
 758                 if (in_kernel) {
 759                         mm_segment_t fs;
 760                         fs = snd_enter_user();
 761                         ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
 762                         snd_leave_user(fs);
 763                 } else {
 764                         ret = snd_pcm_lib_readv(substream, (void __user **)bufs, frames);
 765                 }
 766                 if (ret != -EPIPE && ret != -ESTRPIPE)
 767                         break;
 768         }
 769         return ret;
 770 }
 771
 772 static ssize_t snd_pcm_oss_write2(snd_pcm_substream_t *substream, const char *buf, size_t bytes, int in_kernel)
 773 {
 774         snd_pcm_runtime_t *runtime = substream->runtime;
 775         snd_pcm_sframes_t frames, frames1;
 776         if (runtime->oss.plugin_first) {
 777                 snd_pcm_plugin_channel_t *channels;
 778                 size_t oss_frame_bytes = (runtime->oss.plugin_first->src_width * runtime->oss.plugin_first->src_format.channels) / 8;
 779                 if (!in_kernel) {
 780                         if (copy_from_user(runtime->oss.buffer, (const char __user *)buf, bytes))
 781                                 return -EFAULT;
 782                         buf = runtime->oss.buffer;
 783                 }
 784                 frames = bytes / oss_frame_bytes;
 785                 frames1 = snd_pcm_plug_client_channels_buf(substream, (char *)buf, frames, &channels);
 786                 if (frames1 < 0)
 787                         return frames1;
 788                 frames1 = snd_pcm_plug_write_transfer(substream, channels, frames1);
 789                 if (frames1 <= 0)
 790                         return frames1;
 791                 bytes = frames1 * oss_frame_bytes;
 792         } else {
 793                 frames = bytes_to_frames(runtime, bytes);
 794                 frames1 = snd_pcm_oss_write3(substream, buf, frames, in_kernel);
 795                 if (frames1 <= 0)
 796                         return frames1;
 797                 bytes = frames_to_bytes(runtime, frames1);
 798         }
 799         return bytes;
 800 }
 801
 802 static ssize_t snd_pcm_oss_write1(snd_pcm_substream_t *substream, const char __user *buf, size_t bytes)
 803 {
 804         size_t xfer = 0;
 805         ssize_t tmp;
 806         snd_pcm_runtime_t *runtime = substream->runtime;
 807
 808         if (atomic_read(&runtime->mmap_count))
 809                 return -ENXIO;
 810
 811         if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
 812                 return tmp;
 813         while (bytes > 0) {
 814                 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
 815                         tmp = bytes;
 816                         if (tmp + runtime->oss.buffer_used > runtime->oss.period_bytes)
 817                                 tmp = runtime->oss.period_bytes - runtime->oss.buffer_used;
 818                         if (tmp > 0) {
 819                                 if (copy_from_user(runtime->oss.buffer + runtime->oss.buffer_used, buf, tmp))
 820                                         return xfer > 0 ? (snd_pcm_sframes_t)xfer : -EFAULT;
 821                         }
 822                         runtime->oss.buffer_used += tmp;
 823                         buf += tmp;
 824                         bytes -= tmp;
 825                         xfer += tmp;
 826                         if ((substream->oss.setup != NULL && substream->oss.setup->partialfrag) ||
 827                             runtime->oss.buffer_used == runtime->oss.period_bytes) {
 828                                 tmp = snd_pcm_oss_write2(substream, runtime->oss.buffer + runtime->oss.period_ptr,
 829                                                          runtime->oss.buffer_used - runtime->oss.period_ptr, 1);
 830                                 if (tmp <= 0)
 831                                         return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
 832                                 runtime->oss.bytes += tmp;
 833                                 runtime->oss.period_ptr += tmp;
 834                                 runtime->oss.period_ptr %= runtime->oss.period_bytes;
 835                                 if (runtime->oss.period_ptr == 0 ||
 836                                     runtime->oss.period_ptr == runtime->oss.buffer_used)
 837                                         runtime->oss.buffer_used = 0;
 838                                 else if ((substream->ffile->f_flags & O_NONBLOCK) != 0)
 839                                         return xfer > 0 ? xfer : -EAGAIN;
 840                         }
 841                 } else {
 842                         tmp = snd_pcm_oss_write2(substream, (const char *)buf, runtime->oss.period_bytes, 0);
 843                         if (tmp <= 0)
 844                                 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
 845                         runtime->oss.bytes += tmp;
 846                         buf += tmp;
 847                         bytes -= tmp;
 848                         xfer += tmp;
 849                         if ((substream->ffile->f_flags & O_NONBLOCK) != 0 &&
 850                             tmp != runtime->oss.period_bytes)
 851                                 break;
 852                 }
 853         }
 854         return xfer;
 855 }
 856
 857 static ssize_t snd_pcm_oss_read2(snd_pcm_substream_t *substream, char *buf, size_t bytes, int in_kernel)
 858 {
 859         snd_pcm_runtime_t *runtime = substream->runtime;
 860         snd_pcm_sframes_t frames, frames1;
 861         char __user *final_dst = (char __user *)buf;
 862         if (runtime->oss.plugin_first) {
 863                 snd_pcm_plugin_channel_t *channels;
 864                 size_t oss_frame_bytes = (runtime->oss.plugin_last->dst_width * runtime->oss.plugin_last->dst_format.channels) / 8;
 865                 if (!in_kernel)
 866                         buf = runtime->oss.buffer;
 867                 frames = bytes / oss_frame_bytes;
 868                 frames1 = snd_pcm_plug_client_channels_buf(substream, buf, frames, &channels);
 869                 if (frames1 < 0)
 870                         return frames1;
 871                 frames1 = snd_pcm_plug_read_transfer(substream, channels, frames1);
 872                 if (frames1 <= 0)
 873                         return frames1;
 874                 bytes = frames1 * oss_frame_bytes;
 875                 if (!in_kernel && copy_to_user(final_dst, buf, bytes))
 876                         return -EFAULT;
 877         } else {
 878                 frames = bytes_to_frames(runtime, bytes);
 879                 frames1 = snd_pcm_oss_read3(substream, buf, frames, in_kernel);
 880                 if (frames1 <= 0)
 881                         return frames1;
 882                 bytes = frames_to_bytes(runtime, frames1);
 883         }
 884         return bytes;
 885 }
 886
 887 static ssize_t snd_pcm_oss_read1(snd_pcm_substream_t *substream, char __user *buf, size_t bytes)
 888 {
 889         size_t xfer = 0;
 890         ssize_t tmp;
 891         snd_pcm_runtime_t *runtime = substream->runtime;
 892
 893         if (atomic_read(&runtime->mmap_count))
 894                 return -ENXIO;
 895
 896         if ((tmp = snd_pcm_oss_make_ready(substream)) < 0)
 897                 return tmp;
 898         while (bytes > 0) {
 899                 if (bytes < runtime->oss.period_bytes || runtime->oss.buffer_used > 0) {
 900                         if (runtime->oss.buffer_used == 0) {
 901                                 tmp = snd_pcm_oss_read2(substream, runtime->oss.buffer, runtime->oss.period_bytes, 1);
 902                                 if (tmp <= 0)
 903                                         return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
 904                                 runtime->oss.bytes += tmp;
 905                                 runtime->oss.period_ptr = tmp;
 906                                 runtime->oss.buffer_used = tmp;
 907                         }
 908                         tmp = bytes;
 909                         if ((size_t) tmp > runtime->oss.buffer_used)
 910                                 tmp = runtime->oss.buffer_used;
 911                         if (copy_to_user(buf, runtime->oss.buffer + (runtime->oss.period_ptr - runtime->oss.buffer_used), tmp))
 912                                 return xfer > 0 ? (snd_pcm_sframes_t)xfer : -EFAULT;
 913                         buf += tmp;
 914                         bytes -= tmp;
 915                         xfer += tmp;
 916                         runtime->oss.buffer_used -= tmp;
 917                 } else {
 918                         tmp = snd_pcm_oss_read2(substream, (char *)buf, runtime->oss.period_bytes, 0);
 919                         if (tmp <= 0)
 920                                 return xfer > 0 ? (snd_pcm_sframes_t)xfer : tmp;
 921                         runtime->oss.bytes += tmp;
 922                         buf += tmp;
 923                         bytes -= tmp;
 924                         xfer += tmp;
 925                 }
 926         }
 927         return xfer;
 928 }
 929
 930 static int snd_pcm_oss_reset(snd_pcm_oss_file_t *pcm_oss_file)
 931 {
 932         snd_pcm_substream_t *substream;
 933
 934         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
 935         if (substream != NULL) {
 936                 snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
 937                 substream->runtime->oss.prepare = 1;
 938         }
 939         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
 940         if (substream != NULL) {
 941                 snd_pcm_kernel_capture_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
 942                 substream->runtime->oss.prepare = 1;
 943         }
 944         return 0;
 945 }
 946
 947 static int snd_pcm_oss_post(snd_pcm_oss_file_t *pcm_oss_file)
 948 {
 949         snd_pcm_substream_t *substream;
 950         int err;
 951
 952         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
 953         if (substream != NULL) {
 954                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
 955                         return err;
 956                 snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_START, NULL);
 957         }
 958         /* note: all errors from the start action are ignored */
 959         /* OSS apps do not know, how to handle them */
 960         return 0;
 961 }
 962
 963 static int snd_pcm_oss_sync1(snd_pcm_substream_t *substream, size_t size)
 964 {
 965         snd_pcm_runtime_t *runtime;
 966         ssize_t result = 0;
 967         long res;
 968         wait_queue_t wait;
 969
 970         runtime = substream->runtime;
 971         init_waitqueue_entry(&wait, current);
 972         add_wait_queue(&runtime->sleep, &wait);
 973 #ifdef OSS_DEBUG
 974         printk("sync1: size = %li\n", size);
 975 #endif
 976         while (1) {
 977                 result = snd_pcm_oss_write2(substream, runtime->oss.buffer, size, 1);
 978                 if (result > 0) {
 979                         runtime->oss.buffer_used = 0;
 980                         result = 0;
 981                         break;
 982                 }
 983                 if (result != 0 && result != -EAGAIN)
 984                         break;
 985                 result = 0;
 986                 set_current_state(TASK_INTERRUPTIBLE);
 987                 snd_pcm_stream_lock_irq(substream);
 988                 res = runtime->status->state;
 989                 snd_pcm_stream_unlock_irq(substream);
 990                 if (res != SNDRV_PCM_STATE_RUNNING) {
 991                         set_current_state(TASK_RUNNING);
 992                         break;
 993                 }
 994                 res = schedule_timeout(10 * HZ);
 995                 if (signal_pending(current)) {
 996                         result = -ERESTARTSYS;
 997                         break;
 998                 }
 999                 if (res == 0) {
1000                         snd_printk(KERN_ERR "OSS sync error - DMA timeout\n");
1001                         result = -EIO;
1002                         break;
1003                 }
1004         }
1005         remove_wait_queue(&runtime->sleep, &wait);
1006         return result;
1007 }
1008
1009 static int snd_pcm_oss_sync(snd_pcm_oss_file_t *pcm_oss_file)
1010 {
1011         int err = 0;
1012         unsigned int saved_f_flags;
1013         snd_pcm_substream_t *substream;
1014         snd_pcm_runtime_t *runtime;
1015         snd_pcm_format_t format;
1016         unsigned long width;
1017         size_t size;
1018
1019         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1020         if (substream != NULL) {
1021                 runtime = substream->runtime;
1022                 if (atomic_read(&runtime->mmap_count))
1023                         goto __direct;
1024                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1025                         return err;
1026                 format = snd_pcm_oss_format_from(runtime->oss.format);
1027                 width = snd_pcm_format_physical_width(format);
1028                 if (runtime->oss.buffer_used > 0) {
1029 #ifdef OSS_DEBUG
1030                         printk("sync: buffer_used\n");
1031 #endif
1032                         size = (8 * (runtime->oss.period_bytes - runtime->oss.buffer_used) + 7) / width;
1033                         snd_pcm_format_set_silence(format,
1034                                                    runtime->oss.buffer + runtime->oss.buffer_used,
1035                                                    size);
1036                         err = snd_pcm_oss_sync1(substream, runtime->oss.period_bytes);
1037                         if (err < 0)
1038                                 return err;
1039                 } else if (runtime->oss.period_ptr > 0) {
1040 #ifdef OSS_DEBUG
1041                         printk("sync: period_ptr\n");
1042 #endif
1043                         size = runtime->oss.period_bytes - runtime->oss.period_ptr;
1044                         snd_pcm_format_set_silence(format,
1045                                                    runtime->oss.buffer,
1046                                                    size * 8 / width);
1047                         err = snd_pcm_oss_sync1(substream, size);
1048                         if (err < 0)
1049                                 return err;
1050                 }
1051                 /*
1052                  * The ALSA's period might be a bit large than OSS one.
1053                  * Fill the remain portion of ALSA period with zeros.
1054                  */
1055                 size = runtime->control->appl_ptr % runtime->period_size;
1056                 if (size > 0) {
1057                         size = runtime->period_size - size;
1058                         if (runtime->access == SNDRV_PCM_ACCESS_RW_INTERLEAVED) {
1059                                 size = (runtime->frame_bits * size) / 8;
1060                                 while (size > 0) {
1061                                         mm_segment_t fs;
1062                                         size_t size1 = size < runtime->oss.period_bytes ? size : runtime->oss.period_bytes;
1063                                         size -= size1;
1064                                         size1 *= 8;
1065                                         size1 /= runtime->sample_bits;
1066                                         snd_pcm_format_set_silence(runtime->format,
1067                                                                    runtime->oss.buffer,
1068                                                                    size1);
1069                                         fs = snd_enter_user();
1070                                         snd_pcm_lib_write(substream, (void __user *)runtime->oss.buffer, size1);
1071                                         snd_leave_user(fs);
1072                                 }
1073                         } else if (runtime->access == SNDRV_PCM_ACCESS_RW_NONINTERLEAVED) {
1074                                 void __user *buffers[runtime->channels];
1075                                 memset(buffers, 0, runtime->channels * sizeof(void *));
1076                                 snd_pcm_lib_writev(substream, buffers, size);
1077                         }
1078                 }
1079                 /*
1080                  * finish sync: drain the buffer
1081                  */
1082               __direct:
1083                 saved_f_flags = substream->ffile->f_flags;
1084                 substream->ffile->f_flags &= ~O_NONBLOCK;
1085                 err = snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_DRAIN, NULL);
1086                 substream->ffile->f_flags = saved_f_flags;
1087                 if (err < 0)
1088                         return err;
1089                 runtime->oss.prepare = 1;
1090         }
1091
1092         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1093         if (substream != NULL) {
1094                 if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1095                         return err;
1096                 runtime = substream->runtime;
1097                 err = snd_pcm_kernel_capture_ioctl(substream, SNDRV_PCM_IOCTL_DROP, NULL);
1098                 if (err < 0)
1099                         return err;
1100                 runtime->oss.buffer_used = 0;
1101                 runtime->oss.prepare = 1;
1102         }
1103         return 0;
1104 }
1105
1106 static int snd_pcm_oss_set_rate(snd_pcm_oss_file_t *pcm_oss_file, int rate)
1107 {
1108         int idx;
1109
1110         for (idx = 1; idx >= 0; --idx) {
1111                 snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
1112                 snd_pcm_runtime_t *runtime;
1113                 if (substream == NULL)
1114                         continue;
1115                 runtime = substream->runtime;
1116                 if (rate < 1000)
1117                         rate = 1000;
1118                 else if (rate > 192000)
1119                         rate = 192000;
1120                 if (runtime->oss.rate != rate) {
1121                         runtime->oss.params = 1;
1122                         runtime->oss.rate = rate;
1123                 }
1124         }
1125         return snd_pcm_oss_get_rate(pcm_oss_file);
1126 }
1127
1128 static int snd_pcm_oss_get_rate(snd_pcm_oss_file_t *pcm_oss_file)
1129 {
1130         snd_pcm_substream_t *substream;
1131         int err;
1132
1133         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1134                 return err;
1135         return substream->runtime->oss.rate;
1136 }
1137
1138 static int snd_pcm_oss_set_channels(snd_pcm_oss_file_t *pcm_oss_file, unsigned int channels)
1139 {
1140         int idx;
1141         if (channels < 1)
1142                 channels = 1;
1143         if (channels > 128)
1144                 return -EINVAL;
1145         for (idx = 1; idx >= 0; --idx) {
1146                 snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
1147                 snd_pcm_runtime_t *runtime;
1148                 if (substream == NULL)
1149                         continue;
1150                 runtime = substream->runtime;
1151                 if (runtime->oss.channels != channels) {
1152                         runtime->oss.params = 1;
1153                         runtime->oss.channels = channels;
1154                 }
1155         }
1156         return snd_pcm_oss_get_channels(pcm_oss_file);
1157 }
1158
1159 static int snd_pcm_oss_get_channels(snd_pcm_oss_file_t *pcm_oss_file)
1160 {
1161         snd_pcm_substream_t *substream;
1162         int err;
1163
1164         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1165                 return err;
1166         return substream->runtime->oss.channels;
1167 }
1168
1169 static int snd_pcm_oss_get_block_size(snd_pcm_oss_file_t *pcm_oss_file)
1170 {
1171         snd_pcm_substream_t *substream;
1172         int err;
1173
1174         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1175                 return err;
1176         return substream->runtime->oss.period_bytes;
1177 }
1178
1179 static int snd_pcm_oss_get_formats(snd_pcm_oss_file_t *pcm_oss_file)
1180 {
1181         snd_pcm_substream_t *substream;
1182         int err;
1183         int direct;
1184         snd_pcm_hw_params_t *params;
1185         unsigned int formats = 0;
1186         snd_mask_t format_mask;
1187         int fmt;
1188
1189         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1190                 return err;
1191         if (atomic_read(&substream->runtime->mmap_count)) {
1192                 direct = 1;
1193         } else {
1194                 snd_pcm_oss_setup_t *setup = substream->oss.setup;
1195                 direct = (setup != NULL && setup->direct);
1196         }
1197         if (!direct)
1198                 return AFMT_MU_LAW | AFMT_U8 |
1199                        AFMT_S16_LE | AFMT_S16_BE |
1200                        AFMT_S8 | AFMT_U16_LE |
1201                        AFMT_U16_BE;
1202         params = kmalloc(sizeof(*params), GFP_KERNEL);
1203         if (!params)
1204                 return -ENOMEM;
1205         _snd_pcm_hw_params_any(params);
1206         err = snd_pcm_hw_refine(substream, params);
1207         format_mask = *hw_param_mask(params, SNDRV_PCM_HW_PARAM_FORMAT);
1208         kfree(params);
1209         snd_assert(err >= 0, return err);
1210         for (fmt = 0; fmt < 32; ++fmt) {
1211                 if (snd_mask_test(&format_mask, fmt)) {
1212                         int f = snd_pcm_oss_format_to(fmt);
1213                         if (f >= 0)
1214                                 formats |= f;
1215                 }
1216         }
1217         return formats;
1218 }
1219
1220 static int snd_pcm_oss_set_format(snd_pcm_oss_file_t *pcm_oss_file, int format)
1221 {
1222         int formats, idx;
1223
1224         if (format != AFMT_QUERY) {
1225                 formats = snd_pcm_oss_get_formats(pcm_oss_file);
1226                 if (!(formats & format))
1227                         format = AFMT_U8;
1228                 for (idx = 1; idx >= 0; --idx) {
1229                         snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
1230                         snd_pcm_runtime_t *runtime;
1231                         if (substream == NULL)
1232                                 continue;
1233                         runtime = substream->runtime;
1234                         if (runtime->oss.format != format) {
1235                                 runtime->oss.params = 1;
1236                                 runtime->oss.format = format;
1237                         }
1238                 }
1239         }
1240         return snd_pcm_oss_get_format(pcm_oss_file);
1241 }
1242
1243 static int snd_pcm_oss_get_format(snd_pcm_oss_file_t *pcm_oss_file)
1244 {
1245         snd_pcm_substream_t *substream;
1246         int err;
1247
1248         if ((err = snd_pcm_oss_get_active_substream(pcm_oss_file, &substream)) < 0)
1249                 return err;
1250         return substream->runtime->oss.format;
1251 }
1252
1253 static int snd_pcm_oss_set_subdivide1(snd_pcm_substream_t *substream, int subdivide)
1254 {
1255         snd_pcm_runtime_t *runtime;
1256
1257         if (substream == NULL)
1258                 return 0;
1259         runtime = substream->runtime;
1260         if (subdivide == 0) {
1261                 subdivide = runtime->oss.subdivision;
1262                 if (subdivide == 0)
1263                         subdivide = 1;
1264                 return subdivide;
1265         }
1266         if (runtime->oss.subdivision || runtime->oss.fragshift)
1267                 return -EINVAL;
1268         if (subdivide != 1 && subdivide != 2 && subdivide != 4 &&
1269             subdivide != 8 && subdivide != 16)
1270                 return -EINVAL;
1271         runtime->oss.subdivision = subdivide;
1272         runtime->oss.params = 1;
1273         return subdivide;
1274 }
1275
1276 static int snd_pcm_oss_set_subdivide(snd_pcm_oss_file_t *pcm_oss_file, int subdivide)
1277 {
1278         int err = -EINVAL, idx;
1279
1280         for (idx = 1; idx >= 0; --idx) {
1281                 snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
1282                 if (substream == NULL)
1283                         continue;
1284                 if ((err = snd_pcm_oss_set_subdivide1(substream, subdivide)) < 0)
1285                         return err;
1286         }
1287         return err;
1288 }
1289
1290 static int snd_pcm_oss_set_fragment1(snd_pcm_substream_t *substream, unsigned int val)
1291 {
1292         snd_pcm_runtime_t *runtime;
1293
1294         if (substream == NULL)
1295                 return 0;
1296         runtime = substream->runtime;
1297         if (runtime->oss.subdivision || runtime->oss.fragshift)
1298                 return -EINVAL;
1299         runtime->oss.fragshift = val & 0xffff;
1300         runtime->oss.maxfrags = (val >> 16) & 0xffff;
1301         if (runtime->oss.fragshift < 4)         /* < 16 */
1302                 runtime->oss.fragshift = 4;
1303         if (runtime->oss.maxfrags < 2)
1304                 runtime->oss.maxfrags = 2;
1305         runtime->oss.params = 1;
1306         return 0;
1307 }
1308
1309 static int snd_pcm_oss_set_fragment(snd_pcm_oss_file_t *pcm_oss_file, unsigned int val)
1310 {
1311         int err = -EINVAL, idx;
1312
1313         for (idx = 1; idx >= 0; --idx) {
1314                 snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
1315                 if (substream == NULL)
1316                         continue;
1317                 if ((err = snd_pcm_oss_set_fragment1(substream, val)) < 0)
1318                         return err;
1319         }
1320         return err;
1321 }
1322
1323 static int snd_pcm_oss_nonblock(struct file * file)
1324 {
1325         file->f_flags |= O_NONBLOCK;
1326         return 0;
1327 }
1328
1329 static int snd_pcm_oss_get_caps1(snd_pcm_substream_t *substream, int res)
1330 {
1331
1332         if (substream == NULL) {
1333                 res &= ~DSP_CAP_DUPLEX;
1334                 return res;
1335         }
1336 #ifdef DSP_CAP_MULTI
1337         if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1338                 if (substream->pstr->substream_count > 1)
1339                         res |= DSP_CAP_MULTI;
1340 #endif
1341         /* DSP_CAP_REALTIME is set all times: */
1342         /* all ALSA drivers can return actual pointer in ring buffer */
1343 #if defined(DSP_CAP_REALTIME) && 0
1344         {
1345                 snd_pcm_runtime_t *runtime = substream->runtime;
1346                 if (runtime->info & (SNDRV_PCM_INFO_BLOCK_TRANSFER|SNDRV_PCM_INFO_BATCH))
1347                         res &= ~DSP_CAP_REALTIME;
1348         }
1349 #endif
1350         return res;
1351 }
1352
1353 static int snd_pcm_oss_get_caps(snd_pcm_oss_file_t *pcm_oss_file)
1354 {
1355         int result, idx;
1356
1357         result = DSP_CAP_TRIGGER | DSP_CAP_MMAP | DSP_CAP_DUPLEX | DSP_CAP_REALTIME;
1358         for (idx = 0; idx < 2; idx++) {
1359                 snd_pcm_substream_t *substream = pcm_oss_file->streams[idx];
1360                 result = snd_pcm_oss_get_caps1(substream, result);
1361         }
1362         result |= 0x0001;       /* revision - same as SB AWE 64 */
1363         return result;
1364 }
1365
1366 static void snd_pcm_oss_simulate_fill(snd_pcm_substream_t *substream, snd_pcm_uframes_t hw_ptr)
1367 {
1368         snd_pcm_runtime_t *runtime = substream->runtime;
1369         snd_pcm_uframes_t appl_ptr;
1370         appl_ptr = hw_ptr + runtime->buffer_size;
1371         appl_ptr %= runtime->boundary;
1372         runtime->control->appl_ptr = appl_ptr;
1373 }
1374
1375 static int snd_pcm_oss_set_trigger(snd_pcm_oss_file_t *pcm_oss_file, int trigger)
1376 {
1377         snd_pcm_runtime_t *runtime;
1378         snd_pcm_substream_t *psubstream = NULL, *csubstream = NULL;
1379         int err, cmd;
1380
1381 #ifdef OSS_DEBUG
1382         printk("pcm_oss: trigger = 0x%x\n", trigger);
1383 #endif
1384
1385         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1386         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1387
1388         if (psubstream) {
1389                 if ((err = snd_pcm_oss_make_ready(psubstream)) < 0)
1390                         return err;
1391         }
1392         if (csubstream) {
1393                 if ((err = snd_pcm_oss_make_ready(csubstream)) < 0)
1394                         return err;
1395         }
1396         if (psubstream) {
1397                 runtime = psubstream->runtime;
1398                 if (trigger & PCM_ENABLE_OUTPUT) {
1399                         if (runtime->oss.trigger)
1400                                 goto _skip1;
1401                         if (atomic_read(&psubstream->runtime->mmap_count))
1402                                 snd_pcm_oss_simulate_fill(psubstream, runtime->hw_ptr_interrupt);
1403                         runtime->oss.trigger = 1;
1404                         runtime->start_threshold = 1;
1405                         cmd = SNDRV_PCM_IOCTL_START;
1406                 } else {
1407                         if (!runtime->oss.trigger)
1408                                 goto _skip1;
1409                         runtime->oss.trigger = 0;
1410                         runtime->start_threshold = runtime->boundary;
1411                         cmd = SNDRV_PCM_IOCTL_DROP;
1412                         runtime->oss.prepare = 1;
1413                 }
1414                 err = snd_pcm_kernel_playback_ioctl(psubstream, cmd, NULL);
1415                 if (err < 0)
1416                         return err;
1417         }
1418  _skip1:
1419         if (csubstream) {
1420                 runtime = csubstream->runtime;
1421                 if (trigger & PCM_ENABLE_INPUT) {
1422                         if (runtime->oss.trigger)
1423                                 goto _skip2;
1424                         runtime->oss.trigger = 1;
1425                         runtime->start_threshold = 1;
1426                         cmd = SNDRV_PCM_IOCTL_START;
1427                 } else {
1428                         if (!runtime->oss.trigger)
1429                                 goto _skip2;
1430                         runtime->oss.trigger = 0;
1431                         runtime->start_threshold = runtime->boundary;
1432                         cmd = SNDRV_PCM_IOCTL_DROP;
1433                         runtime->oss.prepare = 1;
1434                 }
1435                 err = snd_pcm_kernel_capture_ioctl(csubstream, cmd, NULL);
1436                 if (err < 0)
1437                         return err;
1438         }
1439  _skip2:
1440         return 0;
1441 }
1442
1443 static int snd_pcm_oss_get_trigger(snd_pcm_oss_file_t *pcm_oss_file)
1444 {
1445         snd_pcm_substream_t *psubstream = NULL, *csubstream = NULL;
1446         int result = 0;
1447
1448         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1449         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1450         if (psubstream && psubstream->runtime && psubstream->runtime->oss.trigger)
1451                 result |= PCM_ENABLE_OUTPUT;
1452         if (csubstream && csubstream->runtime && csubstream->runtime->oss.trigger)
1453                 result |= PCM_ENABLE_INPUT;
1454         return result;
1455 }
1456
1457 static int snd_pcm_oss_get_odelay(snd_pcm_oss_file_t *pcm_oss_file)
1458 {
1459         snd_pcm_substream_t *substream;
1460         snd_pcm_runtime_t *runtime;
1461         snd_pcm_sframes_t delay;
1462         int err;
1463
1464         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1465         if (substream == NULL)
1466                 return -EINVAL;
1467         if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1468                 return err;
1469         runtime = substream->runtime;
1470         if (runtime->oss.params || runtime->oss.prepare)
1471                 return 0;
1472         err = snd_pcm_kernel_playback_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
1473         if (err == -EPIPE)
1474                 delay = 0;      /* hack for broken OSS applications */
1475         else if (err < 0)
1476                 return err;
1477         return snd_pcm_oss_bytes(substream, delay);
1478 }
1479
1480 static int snd_pcm_oss_get_ptr(snd_pcm_oss_file_t *pcm_oss_file, int stream, struct count_info __user * _info)
1481 {
1482         snd_pcm_substream_t *substream;
1483         snd_pcm_runtime_t *runtime;
1484         snd_pcm_sframes_t delay;
1485         int fixup;
1486         struct count_info info;
1487         int err;
1488
1489         if (_info == NULL)
1490                 return -EFAULT;
1491         substream = pcm_oss_file->streams[stream];
1492         if (substream == NULL)
1493                 return -EINVAL;
1494         if ((err = snd_pcm_oss_make_ready(substream)) < 0)
1495                 return err;
1496         runtime = substream->runtime;
1497         if (runtime->oss.params || runtime->oss.prepare) {
1498                 memset(&info, 0, sizeof(info));
1499                 if (copy_to_user(_info, &info, sizeof(info)))
1500                         return -EFAULT;
1501                 return 0;
1502         }
1503         if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1504                 err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &delay);
1505                 if (err == -EPIPE || err == -ESTRPIPE || (! err && delay < 0)) {
1506                         err = 0;
1507                         delay = 0;
1508                         fixup = 0;
1509                 } else {
1510                         fixup = runtime->oss.buffer_used;
1511                 }
1512         } else {
1513                 err = snd_pcm_oss_capture_position_fixup(substream, &delay);
1514                 fixup = -runtime->oss.buffer_used;
1515         }
1516         if (err < 0)
1517                 return err;
1518         info.ptr = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr % runtime->buffer_size);
1519         if (atomic_read(&runtime->mmap_count)) {
1520                 snd_pcm_sframes_t n;
1521                 n = (delay = runtime->hw_ptr_interrupt) - runtime->oss.prev_hw_ptr_interrupt;
1522                 if (n < 0)
1523                         n += runtime->boundary;
1524                 info.blocks = n / runtime->period_size;
1525                 runtime->oss.prev_hw_ptr_interrupt = delay;
1526                 if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
1527                         snd_pcm_oss_simulate_fill(substream, delay);
1528                 info.bytes = snd_pcm_oss_bytes(substream, runtime->status->hw_ptr) & INT_MAX;
1529         } else {
1530                 delay = snd_pcm_oss_bytes(substream, delay) + fixup;
1531                 info.blocks = delay / runtime->oss.period_bytes;
1532                 if (stream == SNDRV_PCM_STREAM_PLAYBACK)
1533                         info.bytes = (runtime->oss.bytes - delay) & INT_MAX;
1534                 else
1535                         info.bytes = (runtime->oss.bytes + delay) & INT_MAX;
1536         }
1537         if (copy_to_user(_info, &info, sizeof(info)))
1538                 return -EFAULT;
1539         return 0;
1540 }
1541
1542 static int snd_pcm_oss_get_space(snd_pcm_oss_file_t *pcm_oss_file, int stream, struct audio_buf_info __user *_info)
1543 {
1544         snd_pcm_substream_t *substream;
1545         snd_pcm_runtime_t *runtime;
1546         snd_pcm_sframes_t avail;
1547         int fixup;
1548         struct audio_buf_info info;
1549         int err;
1550
1551         if (_info == NULL)
1552                 return -EFAULT;
1553         substream = pcm_oss_file->streams[stream];
1554         if (substream == NULL)
1555                 return -EINVAL;
1556         runtime = substream->runtime;
1557
1558         if (runtime->oss.params &&
1559             (err = snd_pcm_oss_change_params(substream)) < 0)
1560                 return err;
1561
1562         info.fragsize = runtime->oss.period_bytes;
1563         info.fragstotal = runtime->periods;
1564         if (runtime->oss.prepare) {
1565                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1566                         info.bytes = runtime->oss.period_bytes * runtime->oss.periods;
1567                         info.fragments = runtime->oss.periods;
1568                 } else {
1569                         info.bytes = 0;
1570                         info.fragments = 0;
1571                 }
1572         } else {
1573                 if (stream == SNDRV_PCM_STREAM_PLAYBACK) {
1574                         err = snd_pcm_kernel_ioctl(substream, SNDRV_PCM_IOCTL_DELAY, &avail);
1575                         if (err == -EPIPE || err == -ESTRPIPE || (! err && avail < 0)) {
1576                                 avail = runtime->buffer_size;
1577                                 err = 0;
1578                                 fixup = 0;
1579                         } else {
1580                                 avail = runtime->buffer_size - avail;
1581                                 fixup = -runtime->oss.buffer_used;
1582                         }
1583                 } else {
1584                         err = snd_pcm_oss_capture_position_fixup(substream, &avail);
1585                         fixup = runtime->oss.buffer_used;
1586                 }
1587                 if (err < 0)
1588                         return err;
1589                 info.bytes = snd_pcm_oss_bytes(substream, avail) + fixup;
1590                 info.fragments = info.bytes / runtime->oss.period_bytes;
1591         }
1592
1593 #ifdef OSS_DEBUG
1594         printk("pcm_oss: space: bytes = %i, fragments = %i, fragstotal = %i, fragsize = %i\n", info.bytes, info.fragments, info.fragstotal, info.fragsize);
1595 #endif
1596         if (copy_to_user(_info, &info, sizeof(info)))
1597                 return -EFAULT;
1598         return 0;
1599 }
1600
1601 static int snd_pcm_oss_get_mapbuf(snd_pcm_oss_file_t *pcm_oss_file, int stream, struct buffmem_desc __user * _info)
1602 {
1603         // it won't be probably implemented
1604         // snd_printd("TODO: snd_pcm_oss_get_mapbuf\n");
1605         return -EINVAL;
1606 }
1607
1608 static snd_pcm_oss_setup_t *snd_pcm_oss_look_for_setup(snd_pcm_t *pcm, int stream, const char *task_name)
1609 {
1610         const char *ptr, *ptrl;
1611         snd_pcm_oss_setup_t *setup;
1612
1613         down(&pcm->streams[stream].oss.setup_mutex);
1614         for (setup = pcm->streams[stream].oss.setup_list; setup; setup = setup->next) {
1615                 if (!strcmp(setup->task_name, task_name)) {
1616                         up(&pcm->streams[stream].oss.setup_mutex);
1617                         return setup;
1618                 }
1619         }
1620         ptr = ptrl = task_name;
1621         while (*ptr) {
1622                 if (*ptr == '/')
1623                         ptrl = ptr + 1;
1624                 ptr++;
1625         }
1626         if (ptrl == task_name) {
1627                 goto __not_found;
1628                 return NULL;
1629         }
1630         for (setup = pcm->streams[stream].oss.setup_list; setup; setup = setup->next) {
1631                 if (!strcmp(setup->task_name, ptrl)) {
1632                         up(&pcm->streams[stream].oss.setup_mutex);
1633                         return setup;
1634                 }
1635         }
1636       __not_found:
1637         up(&pcm->streams[stream].oss.setup_mutex);
1638         return NULL;
1639 }
1640
1641 static void snd_pcm_oss_init_substream(snd_pcm_substream_t *substream,
1642                                        snd_pcm_oss_setup_t *setup,
1643                                        int minor)
1644 {
1645         snd_pcm_runtime_t *runtime;
1646
1647         substream->oss.oss = 1;
1648         substream->oss.setup = setup;
1649         runtime = substream->runtime;
1650         runtime->oss.params = 1;
1651         runtime->oss.trigger = 1;
1652         runtime->oss.rate = 8000;
1653         switch (SNDRV_MINOR_OSS_DEVICE(minor)) {
1654         case SNDRV_MINOR_OSS_PCM_8:
1655                 runtime->oss.format = AFMT_U8;
1656                 break;
1657         case SNDRV_MINOR_OSS_PCM_16:
1658                 runtime->oss.format = AFMT_S16_LE;
1659                 break;
1660         default:
1661                 runtime->oss.format = AFMT_MU_LAW;
1662         }
1663         runtime->oss.channels = 1;
1664         runtime->oss.fragshift = 0;
1665         runtime->oss.maxfrags = 0;
1666         runtime->oss.subdivision = 0;
1667 }
1668
1669 static void snd_pcm_oss_release_substream(snd_pcm_substream_t *substream)
1670 {
1671         snd_pcm_runtime_t *runtime;
1672         runtime = substream->runtime;
1673         vfree(runtime->oss.buffer);
1674         snd_pcm_oss_plugin_clear(substream);
1675         substream->oss.file = NULL;
1676         substream->oss.oss = 0;
1677 }
1678
1679 static int snd_pcm_oss_release_file(snd_pcm_oss_file_t *pcm_oss_file)
1680 {
1681         int cidx;
1682         snd_assert(pcm_oss_file != NULL, return -ENXIO);
1683         for (cidx = 0; cidx < 2; ++cidx) {
1684                 snd_pcm_substream_t *substream = pcm_oss_file->streams[cidx];
1685                 snd_pcm_runtime_t *runtime;
1686                 if (substream == NULL)
1687                         continue;
1688                 runtime = substream->runtime;
1689
1690                 snd_pcm_stream_lock_irq(substream);
1691                 if (snd_pcm_running(substream))
1692                         snd_pcm_stop(substream, SNDRV_PCM_STATE_SETUP);
1693                 snd_pcm_stream_unlock_irq(substream);
1694                 if (substream->open_flag) {
1695                         if (substream->ops->hw_free != NULL)
1696                                 substream->ops->hw_free(substream);
1697                         substream->ops->close(substream);
1698                         substream->open_flag = 0;
1699                 }
1700                 substream->ffile = NULL;
1701                 snd_pcm_oss_release_substream(substream);
1702                 snd_pcm_release_substream(substream);
1703         }
1704         kfree(pcm_oss_file);
1705         return 0;
1706 }
1707
1708 static int snd_pcm_oss_open_file(struct file *file,
1709                                  snd_pcm_t *pcm,
1710                                  snd_pcm_oss_file_t **rpcm_oss_file,
1711                                  int minor,
1712                                  snd_pcm_oss_setup_t *psetup,
1713                                  snd_pcm_oss_setup_t *csetup)
1714 {
1715         int err = 0;
1716         snd_pcm_oss_file_t *pcm_oss_file;
1717         snd_pcm_substream_t *psubstream = NULL, *csubstream = NULL;
1718         unsigned int f_mode = file->f_mode;
1719
1720         snd_assert(rpcm_oss_file != NULL, return -EINVAL);
1721         *rpcm_oss_file = NULL;
1722
1723         pcm_oss_file = kcalloc(1, sizeof(*pcm_oss_file), GFP_KERNEL);
1724         if (pcm_oss_file == NULL)
1725                 return -ENOMEM;
1726
1727         if ((f_mode & (FMODE_WRITE|FMODE_READ)) == (FMODE_WRITE|FMODE_READ) &&
1728             (pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX))
1729                 f_mode = FMODE_WRITE;
1730         if ((f_mode & FMODE_WRITE) && !(psetup && psetup->disable)) {
1731                 if ((err = snd_pcm_open_substream(pcm, SNDRV_PCM_STREAM_PLAYBACK,
1732                                                &psubstream)) < 0) {
1733                         snd_pcm_oss_release_file(pcm_oss_file);
1734                         return err;
1735                 }
1736                 pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK] = psubstream;
1737         }
1738         if ((f_mode & FMODE_READ) && !(csetup && csetup->disable)) {
1739                 if ((err = snd_pcm_open_substream(pcm, SNDRV_PCM_STREAM_CAPTURE,
1740                                                &csubstream)) < 0) {
1741                         if (!(f_mode & FMODE_WRITE) || err != -ENODEV) {
1742                                 snd_pcm_oss_release_file(pcm_oss_file);
1743                                 return err;
1744                         } else {
1745                                 csubstream = NULL;
1746                         }
1747                 }
1748                 pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE] = csubstream;
1749         }
1750
1751         if (psubstream == NULL && csubstream == NULL) {
1752                 snd_pcm_oss_release_file(pcm_oss_file);
1753                 return -EINVAL;
1754         }
1755         if (psubstream != NULL) {
1756                 psubstream->oss.file = pcm_oss_file;
1757                 err = snd_pcm_hw_constraints_init(psubstream);
1758                 if (err < 0) {
1759                         snd_printd("snd_pcm_hw_constraint_init failed\n");
1760                         snd_pcm_oss_release_file(pcm_oss_file);
1761                         return err;
1762                 }
1763                 if ((err = psubstream->ops->open(psubstream)) < 0) {
1764                         snd_pcm_oss_release_file(pcm_oss_file);
1765                         return err;
1766                 }
1767                 psubstream->open_flag = 1;
1768                 err = snd_pcm_hw_constraints_complete(psubstream);
1769                 if (err < 0) {
1770                         snd_printd("snd_pcm_hw_constraint_complete failed\n");
1771                         snd_pcm_oss_release_file(pcm_oss_file);
1772                         return err;
1773                 }
1774                 psubstream->ffile = file;
1775                 snd_pcm_oss_init_substream(psubstream, psetup, minor);
1776         }
1777         if (csubstream != NULL) {
1778                 csubstream->oss.file = pcm_oss_file;
1779                 err = snd_pcm_hw_constraints_init(csubstream);
1780                 if (err < 0) {
1781                         snd_printd("snd_pcm_hw_constraint_init failed\n");
1782                         snd_pcm_oss_release_file(pcm_oss_file);
1783                         return err;
1784                 }
1785                 if ((err = csubstream->ops->open(csubstream)) < 0) {
1786                         snd_pcm_oss_release_file(pcm_oss_file);
1787                         return err;
1788                 }
1789                 csubstream->open_flag = 1;
1790                 err = snd_pcm_hw_constraints_complete(csubstream);
1791                 if (err < 0) {
1792                         snd_printd("snd_pcm_hw_constraint_complete failed\n");
1793                         snd_pcm_oss_release_file(pcm_oss_file);
1794                         return err;
1795                 }
1796                 csubstream->ffile = file;
1797                 snd_pcm_oss_init_substream(csubstream, csetup, minor);
1798         }
1799
1800         file->private_data = pcm_oss_file;
1801         *rpcm_oss_file = pcm_oss_file;
1802         return 0;
1803 }
1804
1805
1806 static int snd_pcm_oss_open(struct inode *inode, struct file *file)
1807 {
1808         int minor = iminor(inode);
1809         int cardnum = SNDRV_MINOR_OSS_CARD(minor);
1810         int device;
1811         int err;
1812         char task_name[32];
1813         snd_pcm_t *pcm;
1814         snd_pcm_oss_file_t *pcm_oss_file;
1815         snd_pcm_oss_setup_t *psetup = NULL, *csetup = NULL;
1816         int nonblock;
1817         wait_queue_t wait;
1818
1819         snd_assert(cardnum >= 0 && cardnum < SNDRV_CARDS, return -ENXIO);
1820         device = SNDRV_MINOR_OSS_DEVICE(minor) == SNDRV_MINOR_OSS_PCM1 ?
1821                 adsp_map[cardnum] : dsp_map[cardnum];
1822
1823         pcm = snd_pcm_devices[(cardnum * SNDRV_PCM_DEVICES) + device];
1824         if (pcm == NULL) {
1825                 err = -ENODEV;
1826                 goto __error1;
1827         }
1828         err = snd_card_file_add(pcm->card, file);
1829         if (err < 0)
1830                 goto __error1;
1831         if (!try_module_get(pcm->card->module)) {
1832                 err = -EFAULT;
1833                 goto __error2;
1834         }
1835         if (snd_task_name(current, task_name, sizeof(task_name)) < 0) {
1836                 err = -EFAULT;
1837                 goto __error;
1838         }
1839         if (file->f_mode & FMODE_WRITE)
1840                 psetup = snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_PLAYBACK, task_name);
1841         if (file->f_mode & FMODE_READ)
1842                 csetup = snd_pcm_oss_look_for_setup(pcm, SNDRV_PCM_STREAM_CAPTURE, task_name);
1843
1844         nonblock = !!(file->f_flags & O_NONBLOCK);
1845         if (psetup && !psetup->disable) {
1846                 if (psetup->nonblock)
1847                         nonblock = 1;
1848                 else if (psetup->block)
1849                         nonblock = 0;
1850         } else if (csetup && !csetup->disable) {
1851                 if (csetup->nonblock)
1852                         nonblock = 1;
1853                 else if (csetup->block)
1854                         nonblock = 0;
1855         }
1856         if (!nonblock)
1857                 nonblock = nonblock_open;
1858
1859         init_waitqueue_entry(&wait, current);
1860         add_wait_queue(&pcm->open_wait, &wait);
1861         down(&pcm->open_mutex);
1862         while (1) {
1863                 err = snd_pcm_oss_open_file(file, pcm, &pcm_oss_file,
1864                                             minor, psetup, csetup);
1865                 if (err >= 0)
1866                         break;
1867                 if (err == -EAGAIN) {
1868                         if (nonblock) {
1869                                 err = -EBUSY;
1870                                 break;
1871                         }
1872                 } else
1873                         break;
1874                 set_current_state(TASK_INTERRUPTIBLE);
1875                 up(&pcm->open_mutex);
1876                 schedule();
1877                 down(&pcm->open_mutex);
1878                 if (signal_pending(current)) {
1879                         err = -ERESTARTSYS;
1880                         break;
1881                 }
1882         }
1883         remove_wait_queue(&pcm->open_wait, &wait);
1884         up(&pcm->open_mutex);
1885         if (err < 0)
1886                 goto __error;
1887         return err;
1888
1889       __error:
1890         module_put(pcm->card->module);
1891       __error2:
1892         snd_card_file_remove(pcm->card, file);
1893       __error1:
1894         return err;
1895 }
1896
1897 static int snd_pcm_oss_release(struct inode *inode, struct file *file)
1898 {
1899         snd_pcm_t *pcm;
1900         snd_pcm_substream_t *substream;
1901         snd_pcm_oss_file_t *pcm_oss_file;
1902
1903         pcm_oss_file = file->private_data;
1904         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
1905         if (substream == NULL)
1906                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
1907         snd_assert(substream != NULL, return -ENXIO);
1908         pcm = substream->pcm;
1909         snd_pcm_oss_sync(pcm_oss_file);
1910         down(&pcm->open_mutex);
1911         snd_pcm_oss_release_file(pcm_oss_file);
1912         up(&pcm->open_mutex);
1913         wake_up(&pcm->open_wait);
1914         module_put(pcm->card->module);
1915         snd_card_file_remove(pcm->card, file);
1916         return 0;
1917 }
1918
1919 static long snd_pcm_oss_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1920 {
1921         snd_pcm_oss_file_t *pcm_oss_file;
1922         int __user *p = (int __user *)arg;
1923         int res;
1924
1925         pcm_oss_file = file->private_data;
1926         if (cmd == OSS_GETVERSION)
1927                 return put_user(SNDRV_OSS_VERSION, p);
1928         if (cmd == OSS_ALSAEMULVER)
1929                 return put_user(1, p);
1930 #if defined(CONFIG_SND_MIXER_OSS) || (defined(MODULE) && defined(CONFIG_SND_MIXER_OSS_MODULE))
1931         if (((cmd >> 8) & 0xff) == 'M') {       /* mixer ioctl - for OSS compatibility */
1932                 snd_pcm_substream_t *substream;
1933                 int idx;
1934                 for (idx = 0; idx < 2; ++idx) {
1935                         substream = pcm_oss_file->streams[idx];
1936                         if (substream != NULL)
1937                                 break;
1938                 }
1939                 snd_assert(substream != NULL, return -ENXIO);
1940                 return snd_mixer_oss_ioctl_card(substream->pcm->card, cmd, arg);
1941         }
1942 #endif
1943         if (((cmd >> 8) & 0xff) != 'P')
1944                 return -EINVAL;
1945 #ifdef OSS_DEBUG
1946         printk("pcm_oss: ioctl = 0x%x\n", cmd);
1947 #endif
1948         switch (cmd) {
1949         case SNDCTL_DSP_RESET:
1950                 return snd_pcm_oss_reset(pcm_oss_file);
1951         case SNDCTL_DSP_SYNC:
1952                 return snd_pcm_oss_sync(pcm_oss_file);
1953         case SNDCTL_DSP_SPEED:
1954                 if (get_user(res, p))
1955                         return -EFAULT;
1956                 if ((res = snd_pcm_oss_set_rate(pcm_oss_file, res))<0)
1957                         return res;
1958                 return put_user(res, p);
1959         case SOUND_PCM_READ_RATE:
1960                 res = snd_pcm_oss_get_rate(pcm_oss_file);
1961                 if (res < 0)
1962                         return res;
1963                 return put_user(res, p);
1964         case SNDCTL_DSP_STEREO:
1965                 if (get_user(res, p))
1966                         return -EFAULT;
1967                 res = res > 0 ? 2 : 1;
1968                 if ((res = snd_pcm_oss_set_channels(pcm_oss_file, res)) < 0)
1969                         return res;
1970                 return put_user(--res, p);
1971         case SNDCTL_DSP_GETBLKSIZE:
1972                 res = snd_pcm_oss_get_block_size(pcm_oss_file);
1973                 if (res < 0)
1974                         return res;
1975                 return put_user(res, p);
1976         case SNDCTL_DSP_SETFMT:
1977                 if (get_user(res, p))
1978                         return -EFAULT;
1979                 res = snd_pcm_oss_set_format(pcm_oss_file, res);
1980                 if (res < 0)
1981                         return res;
1982                 return put_user(res, p);
1983         case SOUND_PCM_READ_BITS:
1984                 res = snd_pcm_oss_get_format(pcm_oss_file);
1985                 if (res < 0)
1986                         return res;
1987                 return put_user(res, p);
1988         case SNDCTL_DSP_CHANNELS:
1989                 if (get_user(res, p))
1990                         return -EFAULT;
1991                 res = snd_pcm_oss_set_channels(pcm_oss_file, res);
1992                 if (res < 0)
1993                         return res;
1994                 return put_user(res, p);
1995         case SOUND_PCM_READ_CHANNELS:
1996                 res = snd_pcm_oss_get_channels(pcm_oss_file);
1997                 if (res < 0)
1998                         return res;
1999                 return put_user(res, p);
2000         case SOUND_PCM_WRITE_FILTER:
2001         case SOUND_PCM_READ_FILTER:
2002                 return -EIO;
2003         case SNDCTL_DSP_POST:
2004                 return snd_pcm_oss_post(pcm_oss_file);
2005         case SNDCTL_DSP_SUBDIVIDE:
2006                 if (get_user(res, p))
2007                         return -EFAULT;
2008                 res = snd_pcm_oss_set_subdivide(pcm_oss_file, res);
2009                 if (res < 0)
2010                         return res;
2011                 return put_user(res, p);
2012         case SNDCTL_DSP_SETFRAGMENT:
2013                 if (get_user(res, p))
2014                         return -EFAULT;
2015                 return snd_pcm_oss_set_fragment(pcm_oss_file, res);
2016         case SNDCTL_DSP_GETFMTS:
2017                 res = snd_pcm_oss_get_formats(pcm_oss_file);
2018                 if (res < 0)
2019                         return res;
2020                 return put_user(res, p);
2021         case SNDCTL_DSP_GETOSPACE:
2022         case SNDCTL_DSP_GETISPACE:
2023                 return snd_pcm_oss_get_space(pcm_oss_file,
2024                         cmd == SNDCTL_DSP_GETISPACE ?
2025                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2026                         (struct audio_buf_info __user *) arg);
2027         case SNDCTL_DSP_NONBLOCK:
2028                 return snd_pcm_oss_nonblock(file);
2029         case SNDCTL_DSP_GETCAPS:
2030                 res = snd_pcm_oss_get_caps(pcm_oss_file);
2031                 if (res < 0)
2032                         return res;
2033                 return put_user(res, p);
2034         case SNDCTL_DSP_GETTRIGGER:
2035                 res = snd_pcm_oss_get_trigger(pcm_oss_file);
2036                 if (res < 0)
2037                         return res;
2038                 return put_user(res, p);
2039         case SNDCTL_DSP_SETTRIGGER:
2040                 if (get_user(res, p))
2041                         return -EFAULT;
2042                 return snd_pcm_oss_set_trigger(pcm_oss_file, res);
2043         case SNDCTL_DSP_GETIPTR:
2044         case SNDCTL_DSP_GETOPTR:
2045                 return snd_pcm_oss_get_ptr(pcm_oss_file,
2046                         cmd == SNDCTL_DSP_GETIPTR ?
2047                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2048                         (struct count_info __user *) arg);
2049         case SNDCTL_DSP_MAPINBUF:
2050         case SNDCTL_DSP_MAPOUTBUF:
2051                 return snd_pcm_oss_get_mapbuf(pcm_oss_file,
2052                         cmd == SNDCTL_DSP_MAPINBUF ?
2053                                 SNDRV_PCM_STREAM_CAPTURE : SNDRV_PCM_STREAM_PLAYBACK,
2054                         (struct buffmem_desc __user *) arg);
2055         case SNDCTL_DSP_SETSYNCRO:
2056                 /* stop DMA now.. */
2057                 return 0;
2058         case SNDCTL_DSP_SETDUPLEX:
2059                 if (snd_pcm_oss_get_caps(pcm_oss_file) & DSP_CAP_DUPLEX)
2060                         return 0;
2061                 return -EIO;
2062         case SNDCTL_DSP_GETODELAY:
2063                 res = snd_pcm_oss_get_odelay(pcm_oss_file);
2064                 if (res < 0) {
2065                         /* it's for sure, some broken apps don't check for error codes */
2066                         put_user(0, p);
2067                         return res;
2068                 }
2069                 return put_user(res, p);
2070         case SNDCTL_DSP_PROFILE:
2071                 return 0;       /* silently ignore */
2072         default:
2073                 snd_printd("pcm_oss: unknown command = 0x%x\n", cmd);
2074         }
2075         return -EINVAL;
2076 }
2077
2078 #ifdef CONFIG_COMPAT
2079 /* all compatible */
2080 #define snd_pcm_oss_ioctl_compat        snd_pcm_oss_ioctl
2081 #else
2082 #define snd_pcm_oss_ioctl_compat        NULL
2083 #endif
2084
2085 static ssize_t snd_pcm_oss_read(struct file *file, char __user *buf, size_t count, loff_t *offset)
2086 {
2087         snd_pcm_oss_file_t *pcm_oss_file;
2088         snd_pcm_substream_t *substream;
2089
2090         pcm_oss_file = file->private_data;
2091         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2092         if (substream == NULL)
2093                 return -ENXIO;
2094 #ifndef OSS_DEBUG
2095         return snd_pcm_oss_read1(substream, buf, count);
2096 #else
2097         {
2098                 ssize_t res = snd_pcm_oss_read1(substream, buf, count);
2099                 printk("pcm_oss: read %li bytes (returned %li bytes)\n", (long)count, (long)res);
2100                 return res;
2101         }
2102 #endif
2103 }
2104
2105 static ssize_t snd_pcm_oss_write(struct file *file, const char __user *buf, size_t count, loff_t *offset)
2106 {
2107         snd_pcm_oss_file_t *pcm_oss_file;
2108         snd_pcm_substream_t *substream;
2109         long result;
2110
2111         pcm_oss_file = file->private_data;
2112         substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2113         if (substream == NULL)
2114                 return -ENXIO;
2115         up(&file->f_dentry->d_inode->i_sem);
2116         result = snd_pcm_oss_write1(substream, buf, count);
2117         down(&file->f_dentry->d_inode->i_sem);
2118 #ifdef OSS_DEBUG
2119         printk("pcm_oss: write %li bytes (wrote %li bytes)\n", (long)count, (long)result);
2120 #endif
2121         return result;
2122 }
2123
2124 static int snd_pcm_oss_playback_ready(snd_pcm_substream_t *substream)
2125 {
2126         snd_pcm_runtime_t *runtime = substream->runtime;
2127         if (atomic_read(&runtime->mmap_count))
2128                 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2129         else
2130                 return snd_pcm_playback_avail(runtime) >= runtime->oss.period_frames;
2131 }
2132
2133 static int snd_pcm_oss_capture_ready(snd_pcm_substream_t *substream)
2134 {
2135         snd_pcm_runtime_t *runtime = substream->runtime;
2136         if (atomic_read(&runtime->mmap_count))
2137                 return runtime->oss.prev_hw_ptr_interrupt != runtime->hw_ptr_interrupt;
2138         else
2139                 return snd_pcm_capture_avail(runtime) >= runtime->oss.period_frames;
2140 }
2141
2142 static unsigned int snd_pcm_oss_poll(struct file *file, poll_table * wait)
2143 {
2144         snd_pcm_oss_file_t *pcm_oss_file;
2145         unsigned int mask;
2146         snd_pcm_substream_t *psubstream = NULL, *csubstream = NULL;
2147
2148         pcm_oss_file = file->private_data;
2149
2150         psubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2151         csubstream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2152
2153         mask = 0;
2154         if (psubstream != NULL) {
2155                 snd_pcm_runtime_t *runtime = psubstream->runtime;
2156                 poll_wait(file, &runtime->sleep, wait);
2157                 snd_pcm_stream_lock_irq(psubstream);
2158                 if (runtime->status->state != SNDRV_PCM_STATE_DRAINING &&
2159                     (runtime->status->state != SNDRV_PCM_STATE_RUNNING ||
2160                      snd_pcm_oss_playback_ready(psubstream)))
2161                         mask |= POLLOUT | POLLWRNORM;
2162                 snd_pcm_stream_unlock_irq(psubstream);
2163         }
2164         if (csubstream != NULL) {
2165                 snd_pcm_runtime_t *runtime = csubstream->runtime;
2166                 enum sndrv_pcm_state ostate;
2167                 poll_wait(file, &runtime->sleep, wait);
2168                 snd_pcm_stream_lock_irq(csubstream);
2169                 if ((ostate = runtime->status->state) != SNDRV_PCM_STATE_RUNNING ||
2170                     snd_pcm_oss_capture_ready(csubstream))
2171                         mask |= POLLIN | POLLRDNORM;
2172                 snd_pcm_stream_unlock_irq(csubstream);
2173                 if (ostate != SNDRV_PCM_STATE_RUNNING && runtime->oss.trigger) {
2174                         snd_pcm_oss_file_t ofile;
2175                         memset(&ofile, 0, sizeof(ofile));
2176                         ofile.streams[SNDRV_PCM_STREAM_CAPTURE] = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2177                         runtime->oss.trigger = 0;
2178                         snd_pcm_oss_set_trigger(&ofile, PCM_ENABLE_INPUT);
2179                 }
2180         }
2181
2182         return mask;
2183 }
2184
2185 static int snd_pcm_oss_mmap(struct file *file, struct vm_area_struct *area)
2186 {
2187         snd_pcm_oss_file_t *pcm_oss_file;
2188         snd_pcm_substream_t *substream = NULL;
2189         snd_pcm_runtime_t *runtime;
2190         int err;
2191
2192 #ifdef OSS_DEBUG
2193         printk("pcm_oss: mmap begin\n");
2194 #endif
2195         pcm_oss_file = file->private_data;
2196         switch ((area->vm_flags & (VM_READ | VM_WRITE))) {
2197         case VM_READ | VM_WRITE:
2198                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2199                 if (substream)
2200                         break;
2201                 /* Fall through */
2202         case VM_READ:
2203                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_CAPTURE];
2204                 break;
2205         case VM_WRITE:
2206                 substream = pcm_oss_file->streams[SNDRV_PCM_STREAM_PLAYBACK];
2207                 break;
2208         default:
2209                 return -EINVAL;
2210         }
2211         /* set VM_READ access as well to fix memset() routines that do
2212            reads before writes (to improve performance) */
2213         area->vm_flags |= VM_READ;
2214         if (substream == NULL)
2215                 return -ENXIO;
2216         runtime = substream->runtime;
2217         if (!(runtime->info & SNDRV_PCM_INFO_MMAP_VALID))
2218                 return -EIO;
2219         if (runtime->info & SNDRV_PCM_INFO_INTERLEAVED)
2220                 runtime->access = SNDRV_PCM_ACCESS_MMAP_INTERLEAVED;
2221         else
2222                 return -EIO;
2223
2224         if (runtime->oss.params) {
2225                 if ((err = snd_pcm_oss_change_params(substream)) < 0)
2226                         return err;
2227         }
2228         if (runtime->oss.plugin_first != NULL)
2229                 return -EIO;
2230
2231         if (area->vm_pgoff != 0)
2232                 return -EINVAL;
2233
2234         err = snd_pcm_mmap_data(substream, file, area);
2235         if (err < 0)
2236                 return err;
2237         runtime->oss.mmap_bytes = area->vm_end - area->vm_start;
2238         runtime->silence_threshold = 0;
2239         runtime->silence_size = 0;
2240 #ifdef OSS_DEBUG
2241         printk("pcm_oss: mmap ok, bytes = 0x%x\n", runtime->oss.mmap_bytes);
2242 #endif
2243         /* In mmap mode we never stop */
2244         runtime->stop_threshold = runtime->boundary;
2245
2246         return 0;
2247 }
2248
2249 /*
2250  *  /proc interface
2251  */
2252
2253 static void snd_pcm_oss_proc_read(snd_info_entry_t *entry,
2254                                   snd_info_buffer_t * buffer)
2255 {
2256         snd_pcm_str_t *pstr = (snd_pcm_str_t *)entry->private_data;
2257         snd_pcm_oss_setup_t *setup = pstr->oss.setup_list;
2258         down(&pstr->oss.setup_mutex);
2259         while (setup) {
2260                 snd_iprintf(buffer, "%s %u %u%s%s%s%s%s%s\n",
2261                             setup->task_name,
2262                             setup->periods,
2263                             setup->period_size,
2264                             setup->disable ? " disable" : "",
2265                             setup->direct ? " direct" : "",
2266                             setup->block ? " block" : "",
2267                             setup->nonblock ? " non-block" : "",
2268                             setup->partialfrag ? " partial-frag" : "",
2269                             setup->nosilence ? " no-silence" : "");
2270                 setup = setup->next;
2271         }
2272         up(&pstr->oss.setup_mutex);
2273 }
2274
2275 static void snd_pcm_oss_proc_free_setup_list(snd_pcm_str_t * pstr)
2276 {
2277         unsigned int idx;
2278         snd_pcm_substream_t *substream;
2279         snd_pcm_oss_setup_t *setup, *setupn;
2280
2281         for (idx = 0, substream = pstr->substream;
2282              idx < pstr->substream_count; idx++, substream = substream->next)
2283                 substream->oss.setup = NULL;
2284         for (setup = pstr->oss.setup_list, pstr->oss.setup_list = NULL;
2285              setup; setup = setupn) {
2286                 setupn = setup->next;
2287                 kfree(setup->task_name);
2288                 kfree(setup);
2289         }
2290         pstr->oss.setup_list = NULL;
2291 }
2292
2293 static void snd_pcm_oss_proc_write(snd_info_entry_t *entry,
2294                                    snd_info_buffer_t * buffer)
2295 {
2296         snd_pcm_str_t *pstr = (snd_pcm_str_t *)entry->private_data;
2297         char line[128], str[32], task_name[32], *ptr;
2298         int idx1;
2299         snd_pcm_oss_setup_t *setup, *setup1, template;
2300
2301         while (!snd_info_get_line(buffer, line, sizeof(line))) {
2302                 down(&pstr->oss.setup_mutex);
2303                 memset(&template, 0, sizeof(template));
2304                 ptr = snd_info_get_str(task_name, line, sizeof(task_name));
2305                 if (!strcmp(task_name, "clear") || !strcmp(task_name, "erase")) {
2306                         snd_pcm_oss_proc_free_setup_list(pstr);
2307                         up(&pstr->oss.setup_mutex);
2308                         continue;
2309                 }
2310                 for (setup = pstr->oss.setup_list; setup; setup = setup->next) {
2311                         if (!strcmp(setup->task_name, task_name)) {
2312                                 template = *setup;
2313                                 break;
2314                         }
2315                 }
2316                 ptr = snd_info_get_str(str, ptr, sizeof(str));
2317                 template.periods = simple_strtoul(str, NULL, 10);
2318                 ptr = snd_info_get_str(str, ptr, sizeof(str));
2319                 template.period_size = simple_strtoul(str, NULL, 10);
2320                 for (idx1 = 31; idx1 >= 0; idx1--)
2321                         if (template.period_size & (1 << idx1))
2322                                 break;
2323                 for (idx1--; idx1 >= 0; idx1--)
2324                         template.period_size &= ~(1 << idx1);
2325                 do {
2326                         ptr = snd_info_get_str(str, ptr, sizeof(str));
2327                         if (!strcmp(str, "disable")) {
2328                                 template.disable = 1;
2329                         } else if (!strcmp(str, "direct")) {
2330                                 template.direct = 1;
2331                         } else if (!strcmp(str, "block")) {
2332                                 template.block = 1;
2333                         } else if (!strcmp(str, "non-block")) {
2334                                 template.nonblock = 1;
2335                         } else if (!strcmp(str, "partial-frag")) {
2336                                 template.partialfrag = 1;
2337                         } else if (!strcmp(str, "no-silence")) {
2338                                 template.nosilence = 1;
2339                         }
2340                 } while (*str);
2341                 if (setup == NULL) {
2342                         setup = (snd_pcm_oss_setup_t *) kmalloc(sizeof(snd_pcm_oss_setup_t), GFP_KERNEL);
2343                         if (setup) {
2344                                 if (pstr->oss.setup_list == NULL) {
2345                                         pstr->oss.setup_list = setup;
2346                                 } else {
2347                                         for (setup1 = pstr->oss.setup_list; setup1->next; setup1 = setup1->next);
2348                                         setup1->next = setup;
2349                                 }
2350                                 template.task_name = snd_kmalloc_strdup(task_name, GFP_KERNEL);
2351                         } else {
2352                                 buffer->error = -ENOMEM;
2353                         }
2354                 }
2355                 if (setup)
2356                         *setup = template;
2357                 up(&pstr->oss.setup_mutex);
2358         }
2359 }
2360
2361 static void snd_pcm_oss_proc_init(snd_pcm_t *pcm)
2362 {
2363         int stream;
2364         for (stream = 0; stream < 2; ++stream) {
2365                 snd_info_entry_t *entry;
2366                 snd_pcm_str_t *pstr = &pcm->streams[stream];
2367                 if (pstr->substream_count == 0)
2368                         continue;
2369                 if ((entry = snd_info_create_card_entry(pcm->card, "oss", pstr->proc_root)) != NULL) {
2370                         entry->content = SNDRV_INFO_CONTENT_TEXT;
2371                         entry->mode = S_IFREG | S_IRUGO | S_IWUSR;
2372                         entry->c.text.read_size = 8192;
2373                         entry->c.text.read = snd_pcm_oss_proc_read;
2374                         entry->c.text.write_size = 8192;
2375                         entry->c.text.write = snd_pcm_oss_proc_write;
2376                         entry->private_data = pstr;
2377                         if (snd_info_register(entry) < 0) {
2378                                 snd_info_free_entry(entry);
2379                                 entry = NULL;
2380                         }
2381                 }
2382                 pstr->oss.proc_entry = entry;
2383         }
2384 }
2385
2386 static void snd_pcm_oss_proc_done(snd_pcm_t *pcm)
2387 {
2388         int stream;
2389         for (stream = 0; stream < 2; ++stream) {
2390                 snd_pcm_str_t *pstr = &pcm->streams[stream];
2391                 if (pstr->oss.proc_entry) {
2392                         snd_info_unregister(pstr->oss.proc_entry);
2393                         pstr->oss.proc_entry = NULL;
2394                         snd_pcm_oss_proc_free_setup_list(pstr);
2395                 }
2396         }
2397 }
2398
2399 /*
2400  *  ENTRY functions
2401  */
2402
2403 static struct file_operations snd_pcm_oss_f_reg =
2404 {
2405         .owner =        THIS_MODULE,
2406         .read =         snd_pcm_oss_read,
2407         .write =        snd_pcm_oss_write,
2408         .open =         snd_pcm_oss_open,
2409         .release =      snd_pcm_oss_release,
2410         .poll =         snd_pcm_oss_poll,
2411         .unlocked_ioctl =       snd_pcm_oss_ioctl,
2412         .compat_ioctl = snd_pcm_oss_ioctl_compat,
2413         .mmap =         snd_pcm_oss_mmap,
2414 };
2415
2416 static snd_minor_t snd_pcm_oss_reg =
2417 {
2418         .comment =      "digital audio",
2419         .f_ops =        &snd_pcm_oss_f_reg,
2420 };
2421
2422 static void register_oss_dsp(snd_pcm_t *pcm, int index)
2423 {
2424         char name[128];
2425         sprintf(name, "dsp%i%i", pcm->card->number, pcm->device);
2426         if (snd_register_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2427                                     pcm->card, index, &snd_pcm_oss_reg,
2428                                     name) < 0) {
2429                 snd_printk("unable to register OSS PCM device %i:%i\n", pcm->card->number, pcm->device);
2430         }
2431 }
2432
2433 static int snd_pcm_oss_register_minor(snd_pcm_t * pcm)
2434 {
2435         pcm->oss.reg = 0;
2436         if (dsp_map[pcm->card->number] == (int)pcm->device) {
2437                 char name[128];
2438                 int duplex;
2439                 register_oss_dsp(pcm, 0);
2440                 duplex = (pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count > 0 &&
2441                               pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream_count &&
2442                               !(pcm->info_flags & SNDRV_PCM_INFO_HALF_DUPLEX));
2443                 sprintf(name, "%s%s", pcm->name, duplex ? " (DUPLEX)" : "");
2444 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
2445                 snd_oss_info_register(SNDRV_OSS_INFO_DEV_AUDIO,
2446                                       pcm->card->number,
2447                                       name);
2448 #endif
2449                 pcm->oss.reg++;
2450                 pcm->oss.reg_mask |= 1;
2451         }
2452         if (adsp_map[pcm->card->number] == (int)pcm->device) {
2453                 register_oss_dsp(pcm, 1);
2454                 pcm->oss.reg++;
2455                 pcm->oss.reg_mask |= 2;
2456         }
2457
2458         if (pcm->oss.reg)
2459                 snd_pcm_oss_proc_init(pcm);
2460
2461         return 0;
2462 }
2463
2464 static int snd_pcm_oss_disconnect_minor(snd_pcm_t * pcm)
2465 {
2466         if (pcm->oss.reg) {
2467                 if (pcm->oss.reg_mask & 1) {
2468                         pcm->oss.reg_mask &= ~1;
2469                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2470                                                   pcm->card, 0);
2471                 }
2472                 if (pcm->oss.reg_mask & 2) {
2473                         pcm->oss.reg_mask &= ~2;
2474                         snd_unregister_oss_device(SNDRV_OSS_DEVICE_TYPE_PCM,
2475                                                   pcm->card, 1);
2476                 }
2477         }
2478         return 0;
2479 }
2480
2481 static int snd_pcm_oss_unregister_minor(snd_pcm_t * pcm)
2482 {
2483         snd_pcm_oss_disconnect_minor(pcm);
2484         if (pcm->oss.reg) {
2485                 if (dsp_map[pcm->card->number] == (int)pcm->device) {
2486 #ifdef SNDRV_OSS_INFO_DEV_AUDIO
2487                         snd_oss_info_unregister(SNDRV_OSS_INFO_DEV_AUDIO, pcm->card->number);
2488 #endif
2489                 }
2490                 pcm->oss.reg = 0;
2491                 snd_pcm_oss_proc_done(pcm);
2492         }
2493         return 0;
2494 }
2495
2496 static snd_pcm_notify_t snd_pcm_oss_notify =
2497 {
2498         .n_register =   snd_pcm_oss_register_minor,
2499         .n_disconnect = snd_pcm_oss_disconnect_minor,
2500         .n_unregister = snd_pcm_oss_unregister_minor,
2501 };
2502
2503 static int __init alsa_pcm_oss_init(void)
2504 {
2505         int i;
2506         int err;
2507
2508         /* check device map table */
2509         for (i = 0; i < SNDRV_CARDS; i++) {
2510                 if (dsp_map[i] < 0 || dsp_map[i] >= SNDRV_PCM_DEVICES) {
2511                         snd_printk("invalid dsp_map[%d] = %d\n", i, dsp_map[i]);
2512                         dsp_map[i] = 0;
2513                 }
2514                 if (adsp_map[i] < 0 || adsp_map[i] >= SNDRV_PCM_DEVICES) {
2515                         snd_printk("invalid adsp_map[%d] = %d\n", i, adsp_map[i]);
2516                         adsp_map[i] = 1;
2517                 }
2518         }
2519         if ((err = snd_pcm_notify(&snd_pcm_oss_notify, 0)) < 0)
2520                 return err;
2521         return 0;
2522 }
2523
2524 static void __exit alsa_pcm_oss_exit(void)
2525 {
2526         snd_pcm_notify(&snd_pcm_oss_notify, 1);
2527 }
2528
2529 module_init(alsa_pcm_oss_init)
2530 module_exit(alsa_pcm_oss_exit)