sound/pci/cs5535audio/cs5535audio_pcm.c

   1 /*
   2  * Driver for audio on multifunction CS5535 companion device
   3  * Copyright (C) Jaya Kumar
   4  *
   5  * Based on Jaroslav Kysela and Takashi Iwai's examples.
   6  * This work was sponsored by CIS(M) Sdn Bhd.
   7  *
   8  * This program is free software; you can redistribute it and/or modify
   9  * it under the terms of the GNU General Public License as published by
  10  * the Free Software Foundation; either version 2 of the License, or
  11  * (at your option) any later version.
  12  *
  13  * This program is distributed in the hope that it will be useful,
  14  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  16  * GNU General Public License for more details.
  17  *
  18  * You should have received a copy of the GNU General Public License
  19  * along with this program; if not, write to the Free Software
  20  * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307 USA
  21  *
  22  * todo: add be fmt support, spdif, pm
  23  */
  24
  25 #include <linux/init.h>
  26 #include <linux/slab.h>
  27 #include <linux/pci.h>
  28 #include <sound/driver.h>
  29 #include <sound/core.h>
  30 #include <sound/control.h>
  31 #include <sound/initval.h>
  32 #include <sound/asoundef.h>
  33 #include <sound/pcm.h>
  34 #include <sound/pcm_params.h>
  35 #include <sound/ac97_codec.h>
  36 #include "cs5535audio.h"
  37
  38 static struct snd_pcm_hardware snd_cs5535audio_playback =
  39 {
  40         .info =                 (
  41                                 SNDRV_PCM_INFO_MMAP |
  42                                 SNDRV_PCM_INFO_INTERLEAVED |
  43                                 SNDRV_PCM_INFO_BLOCK_TRANSFER |
  44                                 SNDRV_PCM_INFO_MMAP_VALID |
  45                                 SNDRV_PCM_INFO_PAUSE |
  46                                 SNDRV_PCM_INFO_SYNC_START |
  47                                 SNDRV_PCM_INFO_RESUME
  48                                 ),
  49         .formats =              (
  50                                 SNDRV_PCM_FMTBIT_S16_LE
  51                                 ),
  52         .rates =                (
  53                                 SNDRV_PCM_RATE_CONTINUOUS |
  54                                 SNDRV_PCM_RATE_8000_48000
  55                                 ),
  56         .rate_min =             4000,
  57         .rate_max =             48000,
  58         .channels_min =         2,
  59         .channels_max =         2,
  60         .buffer_bytes_max =     (128*1024),
  61         .period_bytes_min =     64,
  62         .period_bytes_max =     (64*1024 - 16),
  63         .periods_min =          1,
  64         .periods_max =          CS5535AUDIO_MAX_DESCRIPTORS,
  65         .fifo_size =            0,
  66 };
  67
  68 static struct snd_pcm_hardware snd_cs5535audio_capture =
  69 {
  70         .info =                 (
  71                                 SNDRV_PCM_INFO_MMAP |
  72                                 SNDRV_PCM_INFO_INTERLEAVED |
  73                                 SNDRV_PCM_INFO_BLOCK_TRANSFER |
  74                                 SNDRV_PCM_INFO_MMAP_VALID |
  75                                 SNDRV_PCM_INFO_SYNC_START
  76                                 ),
  77         .formats =              (
  78                                 SNDRV_PCM_FMTBIT_S16_LE
  79                                 ),
  80         .rates =                (
  81                                 SNDRV_PCM_RATE_CONTINUOUS |
  82                                 SNDRV_PCM_RATE_8000_48000
  83                                 ),
  84         .rate_min =             4000,
  85         .rate_max =             48000,
  86         .channels_min =         2,
  87         .channels_max =         2,
  88         .buffer_bytes_max =     (128*1024),
  89         .period_bytes_min =     64,
  90         .period_bytes_max =     (64*1024 - 16),
  91         .periods_min =          1,
  92         .periods_max =          CS5535AUDIO_MAX_DESCRIPTORS,
  93         .fifo_size =            0,
  94 };
  95
  96 static int snd_cs5535audio_playback_open(struct snd_pcm_substream *substream)
  97 {
  98         int err;
  99         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
 100         struct snd_pcm_runtime *runtime = substream->runtime;
 101
 102         runtime->hw = snd_cs5535audio_playback;
 103         cs5535au->playback_substream = substream;
 104         runtime->private_data = &(cs5535au->dmas[CS5535AUDIO_DMA_PLAYBACK]);
 105         snd_pcm_set_sync(substream);
 106         if ((err = snd_pcm_hw_constraint_integer(runtime,
 107                                 SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
 108                 return err;
 109
 110         return 0;
 111 }
 112
 113 static int snd_cs5535audio_playback_close(struct snd_pcm_substream *substream)
 114 {
 115         return 0;
 116 }
 117
 118 #define CS5535AUDIO_DESC_LIST_SIZE \
 119         PAGE_ALIGN(CS5535AUDIO_MAX_DESCRIPTORS * sizeof(struct cs5535audio_dma_desc))
 120
 121 static int cs5535audio_build_dma_packets(struct cs5535audio *cs5535au,
 122                                          struct cs5535audio_dma *dma,
 123                                          struct snd_pcm_substream *substream,
 124                                          unsigned int periods,
 125                                          unsigned int period_bytes)
 126 {
 127         unsigned int i;
 128         u32 addr, desc_addr, jmpprd_addr;
 129         struct cs5535audio_dma_desc *lastdesc;
 130
 131         if (periods > CS5535AUDIO_MAX_DESCRIPTORS)
 132                 return -ENOMEM;
 133
 134         if (dma->desc_buf.area == NULL) {
 135                 if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV,
 136                                         snd_dma_pci_data(cs5535au->pci),
 137                                         CS5535AUDIO_DESC_LIST_SIZE+1,
 138                                         &dma->desc_buf) < 0)
 139                         return -ENOMEM;
 140                 dma->period_bytes = dma->periods = 0;
 141         }
 142
 143         if (dma->periods == periods && dma->period_bytes == period_bytes)
 144                 return 0;
 145
 146         /* the u32 cast is okay because in snd*create we successfully told
 147            pci alloc that we're only 32 bit capable so the uppper will be 0 */
 148         addr = (u32) substream->runtime->dma_addr;
 149         desc_addr = (u32) dma->desc_buf.addr;
 150         for (i = 0; i < periods; i++) {
 151                 struct cs5535audio_dma_desc *desc =
 152                         &((struct cs5535audio_dma_desc *) dma->desc_buf.area)[i];
 153                 desc->addr = cpu_to_le32(addr);
 154                 desc->size = cpu_to_le32(period_bytes);
 155                 desc->ctlreserved = cpu_to_le32(PRD_EOP);
 156                 desc_addr += sizeof(struct cs5535audio_dma_desc);
 157                 addr += period_bytes;
 158         }
 159         /* we reserved one dummy descriptor at the end to do the PRD jump */
 160         lastdesc = &((struct cs5535audio_dma_desc *) dma->desc_buf.area)[periods];
 161         lastdesc->addr = cpu_to_le32((u32) dma->desc_buf.addr);
 162         lastdesc->size = 0;
 163         lastdesc->ctlreserved = cpu_to_le32(PRD_JMP);
 164         jmpprd_addr = cpu_to_le32(lastdesc->addr +
 165                                   (sizeof(struct cs5535audio_dma_desc)*periods));
 166
 167         dma->period_bytes = period_bytes;
 168         dma->periods = periods;
 169         spin_lock_irq(&cs5535au->reg_lock);
 170         dma->ops->disable_dma(cs5535au);
 171         dma->ops->setup_prd(cs5535au, jmpprd_addr);
 172         spin_unlock_irq(&cs5535au->reg_lock);
 173         return 0;
 174 }
 175
 176 static void cs5535audio_playback_enable_dma(struct cs5535audio *cs5535au)
 177 {
 178         cs_writeb(cs5535au, ACC_BM0_CMD, BM_CTL_EN);
 179 }
 180
 181 static void cs5535audio_playback_disable_dma(struct cs5535audio *cs5535au)
 182 {
 183         cs_writeb(cs5535au, ACC_BM0_CMD, 0);
 184 }
 185
 186 static void cs5535audio_playback_pause_dma(struct cs5535audio *cs5535au)
 187 {
 188         cs_writeb(cs5535au, ACC_BM0_CMD, BM_CTL_PAUSE);
 189 }
 190
 191 static void cs5535audio_playback_setup_prd(struct cs5535audio *cs5535au,
 192                                            u32 prd_addr)
 193 {
 194         cs_writel(cs5535au, ACC_BM0_PRD, prd_addr);
 195 }
 196
 197 static u32 cs5535audio_playback_read_prd(struct cs5535audio *cs5535au)
 198 {
 199         return cs_readl(cs5535au, ACC_BM0_PRD);
 200 }
 201
 202 static u32 cs5535audio_playback_read_dma_pntr(struct cs5535audio *cs5535au)
 203 {
 204         return cs_readl(cs5535au, ACC_BM0_PNTR);
 205 }
 206
 207 static void cs5535audio_capture_enable_dma(struct cs5535audio *cs5535au)
 208 {
 209         cs_writeb(cs5535au, ACC_BM1_CMD, BM_CTL_EN);
 210 }
 211
 212 static void cs5535audio_capture_disable_dma(struct cs5535audio *cs5535au)
 213 {
 214         cs_writeb(cs5535au, ACC_BM1_CMD, 0);
 215 }
 216
 217 static void cs5535audio_capture_pause_dma(struct cs5535audio *cs5535au)
 218 {
 219         cs_writeb(cs5535au, ACC_BM1_CMD, BM_CTL_PAUSE);
 220 }
 221
 222 static void cs5535audio_capture_setup_prd(struct cs5535audio *cs5535au,
 223                                           u32 prd_addr)
 224 {
 225         cs_writel(cs5535au, ACC_BM1_PRD, prd_addr);
 226 }
 227
 228 static u32 cs5535audio_capture_read_prd(struct cs5535audio *cs5535au)
 229 {
 230         return cs_readl(cs5535au, ACC_BM1_PRD);
 231 }
 232
 233 static u32 cs5535audio_capture_read_dma_pntr(struct cs5535audio *cs5535au)
 234 {
 235         return cs_readl(cs5535au, ACC_BM1_PNTR);
 236 }
 237
 238 static void cs5535audio_clear_dma_packets(struct cs5535audio *cs5535au,
 239                                           struct cs5535audio_dma *dma,
 240                                           struct snd_pcm_substream *substream)
 241 {
 242         snd_dma_free_pages(&dma->desc_buf);
 243         dma->desc_buf.area = NULL;
 244 }
 245
 246 static int snd_cs5535audio_hw_params(struct snd_pcm_substream *substream,
 247                                      struct snd_pcm_hw_params *hw_params)
 248 {
 249         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
 250         struct cs5535audio_dma *dma = substream->runtime->private_data;
 251         int err;
 252
 253         err = snd_pcm_lib_malloc_pages(substream,
 254                                         params_buffer_bytes(hw_params));
 255         if (err < 0)
 256                 return err;
 257         dma->buf_addr = substream->runtime->dma_addr;
 258         dma->buf_bytes = params_buffer_bytes(hw_params);
 259
 260         err = cs5535audio_build_dma_packets(cs5535au, dma, substream,
 261                                             params_periods(hw_params),
 262                                             params_period_bytes(hw_params));
 263         return err;
 264 }
 265
 266 static int snd_cs5535audio_hw_free(struct snd_pcm_substream *substream)
 267 {
 268         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
 269         struct cs5535audio_dma *dma = substream->runtime->private_data;
 270
 271         cs5535audio_clear_dma_packets(cs5535au, dma, substream);
 272         return snd_pcm_lib_free_pages(substream);
 273 }
 274
 275 static int snd_cs5535audio_playback_prepare(struct snd_pcm_substream *substream)
 276 {
 277         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
 278         return snd_ac97_set_rate(cs5535au->ac97, AC97_PCM_FRONT_DAC_RATE,
 279                                  substream->runtime->rate);
 280 }
 281
 282 static int snd_cs5535audio_trigger(struct snd_pcm_substream *substream, int cmd)
 283 {
 284         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
 285         struct cs5535audio_dma *dma = substream->runtime->private_data;
 286         int err = 0;
 287
 288         spin_lock(&cs5535au->reg_lock);
 289         switch (cmd) {
 290         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 291                 dma->ops->pause_dma(cs5535au);
 292                 break;
 293         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 294                 dma->ops->enable_dma(cs5535au);
 295                 break;
 296         case SNDRV_PCM_TRIGGER_START:
 297                 dma->ops->enable_dma(cs5535au);
 298                 break;
 299         case SNDRV_PCM_TRIGGER_RESUME:
 300                 dma->ops->enable_dma(cs5535au);
 301                 dma->suspended = 0;
 302                 break;
 303         case SNDRV_PCM_TRIGGER_STOP:
 304                 dma->ops->disable_dma(cs5535au);
 305                 break;
 306         case SNDRV_PCM_TRIGGER_SUSPEND:
 307                 dma->ops->disable_dma(cs5535au);
 308                 dma->suspended = 1;
 309                 break;
 310         default:
 311                 snd_printk(KERN_ERR "unhandled trigger\n");
 312                 err = -EINVAL;
 313                 break;
 314         }
 315         spin_unlock(&cs5535au->reg_lock);
 316         return err;
 317 }
 318
 319 static snd_pcm_uframes_t snd_cs5535audio_pcm_pointer(struct snd_pcm_substream
 320                                                         *substream)
 321 {
 322         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
 323         u32 curdma;
 324         struct cs5535audio_dma *dma;
 325
 326         dma = substream->runtime->private_data;
 327         curdma = dma->ops->read_dma_pntr(cs5535au);
 328         if (curdma < dma->buf_addr) {
 329                 snd_printk(KERN_ERR "curdma=%x < %x bufaddr.\n",
 330                                         curdma, dma->buf_addr);
 331                 return 0;
 332         }
 333         curdma -= dma->buf_addr;
 334         if (curdma >= dma->buf_bytes) {
 335                 snd_printk(KERN_ERR "diff=%x >= %x buf_bytes.\n",
 336                                         curdma, dma->buf_bytes);
 337                 return 0;
 338         }
 339         return bytes_to_frames(substream->runtime, curdma);
 340 }
 341
 342 static int snd_cs5535audio_capture_open(struct snd_pcm_substream *substream)
 343 {
 344         int err;
 345         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
 346         struct snd_pcm_runtime *runtime = substream->runtime;
 347
 348         runtime->hw = snd_cs5535audio_capture;
 349         cs5535au->capture_substream = substream;
 350         runtime->private_data = &(cs5535au->dmas[CS5535AUDIO_DMA_CAPTURE]);
 351         snd_pcm_set_sync(substream);
 352         if ((err = snd_pcm_hw_constraint_integer(runtime,
 353                                          SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
 354                 return err;
 355         return 0;
 356 }
 357
 358 static int snd_cs5535audio_capture_close(struct snd_pcm_substream *substream)
 359 {
 360         return 0;
 361 }
 362
 363 static int snd_cs5535audio_capture_prepare(struct snd_pcm_substream *substream)
 364 {
 365         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
 366         return snd_ac97_set_rate(cs5535au->ac97, AC97_PCM_LR_ADC_RATE,
 367                                  substream->runtime->rate);
 368 }
 369
 370 static struct snd_pcm_ops snd_cs5535audio_playback_ops = {
 371         .open =         snd_cs5535audio_playback_open,
 372         .close =        snd_cs5535audio_playback_close,
 373         .ioctl =        snd_pcm_lib_ioctl,
 374         .hw_params =    snd_cs5535audio_hw_params,
 375         .hw_free =      snd_cs5535audio_hw_free,
 376         .prepare =      snd_cs5535audio_playback_prepare,
 377         .trigger =      snd_cs5535audio_trigger,
 378         .pointer =      snd_cs5535audio_pcm_pointer,
 379 };
 380
 381 static struct snd_pcm_ops snd_cs5535audio_capture_ops = {
 382         .open =         snd_cs5535audio_capture_open,
 383         .close =        snd_cs5535audio_capture_close,
 384         .ioctl =        snd_pcm_lib_ioctl,
 385         .hw_params =    snd_cs5535audio_hw_params,
 386         .hw_free =      snd_cs5535audio_hw_free,
 387         .prepare =      snd_cs5535audio_capture_prepare,
 388         .trigger =      snd_cs5535audio_trigger,
 389         .pointer =      snd_cs5535audio_pcm_pointer,
 390 };
 391
 392 static struct cs5535audio_dma_ops snd_cs5535audio_playback_dma_ops = {
 393         .type = CS5535AUDIO_DMA_PLAYBACK,
 394         .enable_dma = cs5535audio_playback_enable_dma,
 395         .disable_dma = cs5535audio_playback_disable_dma,
 396         .setup_prd = cs5535audio_playback_setup_prd,
 397         .read_prd = cs5535audio_playback_read_prd,
 398         .pause_dma = cs5535audio_playback_pause_dma,
 399         .read_dma_pntr = cs5535audio_playback_read_dma_pntr,
 400 };
 401
 402 static struct cs5535audio_dma_ops snd_cs5535audio_capture_dma_ops = {
 403         .type = CS5535AUDIO_DMA_CAPTURE,
 404         .enable_dma = cs5535audio_capture_enable_dma,
 405         .disable_dma = cs5535audio_capture_disable_dma,
 406         .setup_prd = cs5535audio_capture_setup_prd,
 407         .read_prd = cs5535audio_capture_read_prd,
 408         .pause_dma = cs5535audio_capture_pause_dma,
 409         .read_dma_pntr = cs5535audio_capture_read_dma_pntr,
 410 };
 411
 412 int __devinit snd_cs5535audio_pcm(struct cs5535audio *cs5535au)
 413 {
 414         struct snd_pcm *pcm;
 415         int err;
 416
 417         err = snd_pcm_new(cs5535au->card, "CS5535 Audio", 0, 1, 1, &pcm);
 418         if (err < 0)
 419                 return err;
 420
 421         cs5535au->dmas[CS5535AUDIO_DMA_PLAYBACK].ops =
 422                                         &snd_cs5535audio_playback_dma_ops;
 423         cs5535au->dmas[CS5535AUDIO_DMA_CAPTURE].ops =
 424                                         &snd_cs5535audio_capture_dma_ops;
 425         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
 426                                         &snd_cs5535audio_playback_ops);
 427         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
 428                                         &snd_cs5535audio_capture_ops);
 429
 430         pcm->private_data = cs5535au;
 431         pcm->info_flags = 0;
 432         strcpy(pcm->name, "CS5535 Audio");
 433
 434         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
 435                                         snd_dma_pci_data(cs5535au->pci),
 436                                         64*1024, 128*1024);
 437         cs5535au->pcm = pcm;
 438
 439         return 0;
 440 }
 441