git.oblomov.eu Git - linux-2.6/blob - sound/oss/emu10k1/cardwi.c

   1 /*
   2  **********************************************************************
   3  *     cardwi.c - PCM input HAL for emu10k1 driver
   4  *     Copyright 1999, 2000 Creative Labs, Inc.
   5  *
   6  **********************************************************************
   7  *
   8  *     Date                 Author          Summary of changes
   9  *     ----                 ------          ------------------
  10  *     October 20, 1999     Bertrand Lee    base code release
  11  *
  12  **********************************************************************
  13  *
  14  *     This program is free software; you can redistribute it and/or
  15  *     modify it under the terms of the GNU General Public License as
  16  *     published by the Free Software Foundation; either version 2 of
  17  *     the License, or (at your option) any later version.
  18  *
  19  *     This program is distributed in the hope that it will be useful,
  20  *     but WITHOUT ANY WARRANTY; without even the implied warranty of
  21  *     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  22  *     GNU General Public License for more details.
  23  *
  24  *     You should have received a copy of the GNU General Public
  25  *     License along with this program; if not, write to the Free
  26  *     Software Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139,
  27  *     USA.
  28  *
  29  **********************************************************************
  30  */
  31
  32 #include <linux/poll.h>
  33 #include "hwaccess.h"
  34 #include "timer.h"
  35 #include "recmgr.h"
  36 #include "audio.h"
  37 #include "cardwi.h"
  38
  39 /**
  40  * query_format - returns a valid sound format
  41  *
  42  * This function will return a valid sound format as close
  43  * to the requested one as possible.
  44  */
  45 static void query_format(int recsrc, struct wave_format *wave_fmt)
  46 {
  47
  48         switch (recsrc) {
  49         case WAVERECORD_AC97:
  50
  51                 if ((wave_fmt->channels != 1) && (wave_fmt->channels != 2))
  52                         wave_fmt->channels = 2;
  53
  54                 if (wave_fmt->samplingrate >= (0xBB80 + 0xAC44) / 2)
  55                         wave_fmt->samplingrate = 0xBB80;
  56                 else if (wave_fmt->samplingrate >= (0xAC44 + 0x7D00) / 2)
  57                         wave_fmt->samplingrate = 0xAC44;
  58                 else if (wave_fmt->samplingrate >= (0x7D00 + 0x5DC0) / 2)
  59                         wave_fmt->samplingrate = 0x7D00;
  60                 else if (wave_fmt->samplingrate >= (0x5DC0 + 0x5622) / 2)
  61                         wave_fmt->samplingrate = 0x5DC0;
  62                 else if (wave_fmt->samplingrate >= (0x5622 + 0x3E80) / 2)
  63                         wave_fmt->samplingrate = 0x5622;
  64                 else if (wave_fmt->samplingrate >= (0x3E80 + 0x2B11) / 2)
  65                         wave_fmt->samplingrate = 0x3E80;
  66                 else if (wave_fmt->samplingrate >= (0x2B11 + 0x1F40) / 2)
  67                         wave_fmt->samplingrate = 0x2B11;
  68                 else
  69                         wave_fmt->samplingrate = 0x1F40;
  70
  71                 switch (wave_fmt->id) {
  72                 case AFMT_S16_LE:
  73                         wave_fmt->bitsperchannel = 16;
  74                         break;
  75                 case AFMT_U8:
  76                         wave_fmt->bitsperchannel = 8;
  77                         break;
  78                 default:
  79                         wave_fmt->id = AFMT_S16_LE;
  80                         wave_fmt->bitsperchannel = 16;
  81                         break;
  82                 }
  83
  84                 break;
  85
  86         /* these can't be changed from the original values */
  87         case WAVERECORD_MIC:
  88         case WAVERECORD_FX:
  89                 break;
  90
  91         default:
  92                 BUG();
  93                 break;
  94         }
  95
  96         wave_fmt->bytesperchannel = wave_fmt->bitsperchannel >> 3;
  97         wave_fmt->bytespersample = wave_fmt->channels * wave_fmt->bytesperchannel;
  98         wave_fmt->bytespersec = wave_fmt->bytespersample * wave_fmt->samplingrate;
  99         wave_fmt->bytespervoicesample = wave_fmt->bytespersample;
 100 }
 101
 102 static int alloc_buffer(struct emu10k1_card *card, struct wavein_buffer *buffer)
 103 {
 104         buffer->addr = pci_alloc_consistent(card->pci_dev, buffer->size * buffer->cov,
 105                                             &buffer->dma_handle);
 106         if (buffer->addr == NULL)
 107                 return -1;
 108
 109         return 0;
 110 }
 111
 112 static void free_buffer(struct emu10k1_card *card, struct wavein_buffer *buffer)
 113 {
 114         if (buffer->addr != NULL)
 115                 pci_free_consistent(card->pci_dev, buffer->size * buffer->cov,
 116                                     buffer->addr, buffer->dma_handle);
 117 }
 118
 119 int emu10k1_wavein_open(struct emu10k1_wavedevice *wave_dev)
 120 {
 121         struct emu10k1_card *card = wave_dev->card;
 122         struct wiinst *wiinst = wave_dev->wiinst;
 123         struct wiinst **wiinst_tmp = NULL;
 124         u16 delay;
 125         unsigned long flags;
 126
 127         DPF(2, "emu10k1_wavein_open()\n");
 128
 129         switch (wiinst->recsrc) {
 130         case WAVERECORD_AC97:
 131                 wiinst_tmp = &card->wavein.ac97;
 132                 break;
 133         case WAVERECORD_MIC:
 134                 wiinst_tmp = &card->wavein.mic;
 135                 break;
 136         case WAVERECORD_FX:
 137                 wiinst_tmp = &card->wavein.fx;
 138                 break;
 139         default:
 140                 BUG();
 141                 break;
 142         }
 143
 144         spin_lock_irqsave(&card->lock, flags);
 145         if (*wiinst_tmp != NULL) {
 146                 spin_unlock_irqrestore(&card->lock, flags);
 147                 return -1;
 148         }
 149
 150         *wiinst_tmp = wiinst;
 151         spin_unlock_irqrestore(&card->lock, flags);
 152
 153         /* handle 8 bit recording */
 154         if (wiinst->format.bytesperchannel == 1) {
 155                 if (wiinst->buffer.size > 0x8000) {
 156                         wiinst->buffer.size = 0x8000;
 157                         wiinst->buffer.sizeregval = 0x1f;
 158                 } else
 159                         wiinst->buffer.sizeregval += 4;
 160
 161                 wiinst->buffer.cov = 2;
 162         } else
 163                 wiinst->buffer.cov = 1;
 164
 165         if (alloc_buffer(card, &wiinst->buffer) < 0) {
 166                 ERROR();
 167                 return -1;
 168         }
 169
 170         emu10k1_set_record_src(card, wiinst);
 171
 172         emu10k1_reset_record(card, &wiinst->buffer);
 173
 174         wiinst->buffer.hw_pos = 0;
 175         wiinst->buffer.pos = 0;
 176         wiinst->buffer.bytestocopy = 0;
 177
 178         delay = (48000 * wiinst->buffer.fragment_size) / wiinst->format.bytespersec;
 179
 180         emu10k1_timer_install(card, &wiinst->timer, delay / 2);
 181
 182         wiinst->state = WAVE_STATE_OPEN;
 183
 184         return 0;
 185 }
 186
 187 void emu10k1_wavein_close(struct emu10k1_wavedevice *wave_dev)
 188 {
 189         struct emu10k1_card *card = wave_dev->card;
 190         struct wiinst *wiinst = wave_dev->wiinst;
 191         unsigned long flags;
 192
 193         DPF(2, "emu10k1_wavein_close()\n");
 194
 195         emu10k1_wavein_stop(wave_dev);
 196
 197         emu10k1_timer_uninstall(card, &wiinst->timer);
 198
 199         free_buffer(card, &wiinst->buffer);
 200
 201         spin_lock_irqsave(&card->lock, flags);
 202         switch (wave_dev->wiinst->recsrc) {
 203         case WAVERECORD_AC97:
 204                 card->wavein.ac97 = NULL;
 205                 break;
 206         case WAVERECORD_MIC:
 207                 card->wavein.mic = NULL;
 208                 break;
 209         case WAVERECORD_FX:
 210                 card->wavein.fx = NULL;
 211                 break;
 212         default:
 213                 BUG();
 214                 break;
 215         }
 216         spin_unlock_irqrestore(&card->lock, flags);
 217
 218         wiinst->state = WAVE_STATE_CLOSED;
 219 }
 220
 221 void emu10k1_wavein_start(struct emu10k1_wavedevice *wave_dev)
 222 {
 223         struct emu10k1_card *card = wave_dev->card;
 224         struct wiinst *wiinst = wave_dev->wiinst;
 225
 226         DPF(2, "emu10k1_wavein_start()\n");
 227
 228         emu10k1_start_record(card, &wiinst->buffer);
 229         emu10k1_timer_enable(wave_dev->card, &wiinst->timer);
 230
 231         wiinst->state |= WAVE_STATE_STARTED;
 232 }
 233
 234 void emu10k1_wavein_stop(struct emu10k1_wavedevice *wave_dev)
 235 {
 236         struct emu10k1_card *card = wave_dev->card;
 237         struct wiinst *wiinst = wave_dev->wiinst;
 238
 239         DPF(2, "emu10k1_wavein_stop()\n");
 240
 241         if (!(wiinst->state & WAVE_STATE_STARTED))
 242                 return;
 243
 244         emu10k1_timer_disable(card, &wiinst->timer);
 245         emu10k1_stop_record(card, &wiinst->buffer);
 246
 247         wiinst->state &= ~WAVE_STATE_STARTED;
 248 }
 249
 250 int emu10k1_wavein_setformat(struct emu10k1_wavedevice *wave_dev, struct wave_format *format)
 251 {
 252         struct emu10k1_card *card = wave_dev->card;
 253         struct wiinst *wiinst = wave_dev->wiinst;
 254         u16 delay;
 255
 256         DPF(2, "emu10k1_wavein_setformat()\n");
 257
 258         if (wiinst->state & WAVE_STATE_STARTED)
 259                 return -1;
 260
 261         query_format(wiinst->recsrc, format);
 262
 263         if ((wiinst->format.samplingrate != format->samplingrate)
 264             || (wiinst->format.bitsperchannel != format->bitsperchannel)
 265             || (wiinst->format.channels != format->channels)) {
 266
 267                 wiinst->format = *format;
 268
 269                 if (wiinst->state == WAVE_STATE_CLOSED)
 270                         return 0;
 271
 272                 wiinst->buffer.size *= wiinst->buffer.cov;
 273
 274                 if (wiinst->format.bytesperchannel == 1) {
 275                         wiinst->buffer.cov = 2;
 276                         wiinst->buffer.size /= wiinst->buffer.cov;
 277                 } else
 278                         wiinst->buffer.cov = 1;
 279
 280                 emu10k1_timer_uninstall(card, &wiinst->timer);
 281
 282                 delay = (48000 * wiinst->buffer.fragment_size) / wiinst->format.bytespersec;
 283
 284                 emu10k1_timer_install(card, &wiinst->timer, delay / 2);
 285         }
 286
 287         return 0;
 288 }
 289
 290 void emu10k1_wavein_getxfersize(struct wiinst *wiinst, u32 * size)
 291 {
 292         struct wavein_buffer *buffer = &wiinst->buffer;
 293
 294         *size = buffer->bytestocopy;
 295
 296         if (wiinst->mmapped)
 297                 return;
 298
 299         if (*size > buffer->size) {
 300                 *size = buffer->size;
 301                 buffer->pos = buffer->hw_pos;
 302                 buffer->bytestocopy = buffer->size;
 303                 DPF(1, "buffer overrun\n");
 304         }
 305 }
 306
 307 static int copy_block(u8 __user *dst, u8 * src, u32 str, u32 len, u8 cov)
 308 {
 309         if (cov == 1) {
 310                 if (__copy_to_user(dst, src + str, len))
 311                         return -EFAULT;
 312         } else {
 313                 u8 byte;
 314                 u32 i;
 315
 316                 src += 1 + 2 * str;
 317
 318                 for (i = 0; i < len; i++) {
 319                         byte = src[2 * i] ^ 0x80;
 320                         if (__copy_to_user(dst + i, &byte, 1))
 321                                 return -EFAULT;
 322                 }
 323         }
 324
 325         return 0;
 326 }
 327
 328 int emu10k1_wavein_xferdata(struct wiinst *wiinst, u8 __user *data, u32 * size)
 329 {
 330         struct wavein_buffer *buffer = &wiinst->buffer;
 331         u32 sizetocopy, sizetocopy_now, start;
 332         unsigned long flags;
 333         int ret;
 334
 335         sizetocopy = min_t(u32, buffer->size, *size);
 336         *size = sizetocopy;
 337
 338         if (!sizetocopy)
 339                 return 0;
 340
 341         spin_lock_irqsave(&wiinst->lock, flags);
 342         start = buffer->pos;
 343         buffer->pos += sizetocopy;
 344         buffer->pos %= buffer->size;
 345         buffer->bytestocopy -= sizetocopy;
 346         sizetocopy_now = buffer->size - start;
 347
 348         spin_unlock_irqrestore(&wiinst->lock, flags);
 349
 350         if (sizetocopy > sizetocopy_now) {
 351                 sizetocopy -= sizetocopy_now;
 352
 353                 ret = copy_block(data, buffer->addr, start, sizetocopy_now,
 354                                  buffer->cov);
 355                 if (ret == 0)
 356                         ret = copy_block(data + sizetocopy_now, buffer->addr, 0,
 357                                          sizetocopy, buffer->cov);
 358         } else {
 359                 ret = copy_block(data, buffer->addr, start, sizetocopy,
 360                                  buffer->cov);
 361         }
 362
 363         return ret;
 364 }
 365
 366 void emu10k1_wavein_update(struct emu10k1_card *card, struct wiinst *wiinst)
 367 {
 368         u32 hw_pos;
 369         u32 diff;
 370
 371         /* There is no actual start yet */
 372         if (!(wiinst->state & WAVE_STATE_STARTED)) {
 373                 hw_pos = wiinst->buffer.hw_pos;
 374         } else {
 375                 /* hw_pos in byte units */
 376                 hw_pos = sblive_readptr(card, wiinst->buffer.idxreg, 0) / wiinst->buffer.cov;
 377         }
 378
 379         diff = (wiinst->buffer.size + hw_pos - wiinst->buffer.hw_pos) % wiinst->buffer.size;
 380         wiinst->total_recorded += diff;
 381         wiinst->buffer.bytestocopy += diff;
 382
 383         wiinst->buffer.hw_pos = hw_pos;
 384 }