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