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                                 ),
  48         .formats =              (
  49                                 SNDRV_PCM_FMTBIT_S16_LE
  50                                 ),
  51         .rates =                (
  52                                 SNDRV_PCM_RATE_CONTINUOUS |
  53                                 SNDRV_PCM_RATE_8000_48000
  54                                 ),
  55         .rate_min =             4000,
  56         .rate_max =             48000,
  57         .channels_min =         2,
  58         .channels_max =         2,
  59         .buffer_bytes_max =     (128*1024),
  60         .period_bytes_min =     64,
  61         .period_bytes_max =     (64*1024 - 16),
  62         .periods_min =          1,
  63         .periods_max =          CS5535AUDIO_MAX_DESCRIPTORS,
  64         .fifo_size =            0,
  65 };
  66
  67 static struct snd_pcm_hardware snd_cs5535audio_capture =
  68 {
  69         .info =                 (
  70                                 SNDRV_PCM_INFO_MMAP |
  71                                 SNDRV_PCM_INFO_INTERLEAVED |
  72                                 SNDRV_PCM_INFO_BLOCK_TRANSFER |
  73                                 SNDRV_PCM_INFO_MMAP_VALID |
  74                                 SNDRV_PCM_INFO_SYNC_START
  75                                 ),
  76         .formats =              (
  77                                 SNDRV_PCM_FMTBIT_S16_LE
  78                                 ),
  79         .rates =                (
  80                                 SNDRV_PCM_RATE_CONTINUOUS |
  81                                 SNDRV_PCM_RATE_8000_48000
  82                                 ),
  83         .rate_min =             4000,
  84         .rate_max =             48000,
  85         .channels_min =         2,
  86         .channels_max =         2,
  87         .buffer_bytes_max =     (128*1024),
  88         .period_bytes_min =     64,
  89         .period_bytes_max =     (64*1024 - 16),
  90         .periods_min =          1,
  91         .periods_max =          CS5535AUDIO_MAX_DESCRIPTORS,
  92         .fifo_size =            0,
  93 };
  94
  95 static int snd_cs5535audio_playback_open(struct snd_pcm_substream *substream)
  96 {
  97         int err;
  98         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
  99         struct snd_pcm_runtime *runtime = substream->runtime;
 100
 101         runtime->hw = snd_cs5535audio_playback;
 102         cs5535au->playback_substream = substream;
 103         runtime->private_data = &(cs5535au->dmas[CS5535AUDIO_DMA_PLAYBACK]);
 104         snd_pcm_set_sync(substream);
 105         if ((err = snd_pcm_hw_constraint_integer(runtime,
 106                                 SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
 107                 return err;
 108
 109         return 0;
 110 }
 111
 112 static int snd_cs5535audio_playback_close(struct snd_pcm_substream *substream)
 113 {
 114         return 0;
 115 }
 116
 117 #define CS5535AUDIO_DESC_LIST_SIZE \
 118         PAGE_ALIGN(CS5535AUDIO_MAX_DESCRIPTORS * sizeof(struct cs5535audio_dma_desc))
 119
 120 static int cs5535audio_build_dma_packets(struct cs5535audio *cs5535au,
 121                                          struct cs5535audio_dma *dma,
 122                                          struct snd_pcm_substream *substream,
 123                                          unsigned int periods,
 124                                          unsigned int period_bytes)
 125 {
 126         unsigned int i;
 127         u32 addr, desc_addr, jmpprd_addr;
 128         struct cs5535audio_dma_desc *lastdesc;
 129
 130         if (periods > CS5535AUDIO_MAX_DESCRIPTORS)
 131                 return -ENOMEM;
 132
 133         if (dma->desc_buf.area == NULL) {
 134                 if (snd_dma_alloc_pages(SNDRV_DMA_TYPE_DEV,
 135                                         snd_dma_pci_data(cs5535au->pci),
 136                                         CS5535AUDIO_DESC_LIST_SIZE+1,
 137                                         &dma->desc_buf) < 0)
 138                         return -ENOMEM;
 139                 dma->period_bytes = dma->periods = 0;
 140         }
 141
 142         if (dma->periods == periods && dma->period_bytes == period_bytes)
 143                 return 0;
 144
 145         /* the u32 cast is okay because in snd*create we succesfully told
 146            pci alloc that we're only 32 bit capable so the uppper will be 0 */
 147         addr = (u32) substream->runtime->dma_addr;
 148         desc_addr = (u32) dma->desc_buf.addr;
 149         for (i = 0; i < periods; i++) {
 150                 struct cs5535audio_dma_desc *desc =
 151                         &((struct cs5535audio_dma_desc *) dma->desc_buf.area)[i];
 152                 desc->addr = cpu_to_le32(addr);
 153                 desc->size = cpu_to_le32(period_bytes);
 154                 desc->ctlreserved = cpu_to_le32(PRD_EOP);
 155                 desc_addr += sizeof(struct cs5535audio_dma_desc);
 156                 addr += period_bytes;
 157         }
 158         /* we reserved one dummy descriptor at the end to do the PRD jump */
 159         lastdesc = &((struct cs5535audio_dma_desc *) dma->desc_buf.area)[periods];
 160         lastdesc->addr = cpu_to_le32((u32) dma->desc_buf.addr);
 161         lastdesc->size = 0;
 162         lastdesc->ctlreserved = cpu_to_le32(PRD_JMP);
 163         jmpprd_addr = cpu_to_le32(lastdesc->addr +
 164                                   (sizeof(struct cs5535audio_dma_desc)*periods));
 165
 166         dma->period_bytes = period_bytes;
 167         dma->periods = periods;
 168         spin_lock_irq(&cs5535au->reg_lock);
 169         dma->ops->disable_dma(cs5535au);
 170         dma->ops->setup_prd(cs5535au, jmpprd_addr);
 171         spin_unlock_irq(&cs5535au->reg_lock);
 172         return 0;
 173 }
 174
 175 static void cs5535audio_playback_enable_dma(struct cs5535audio *cs5535au)
 176 {
 177         cs_writeb(cs5535au, ACC_BM0_CMD, BM_CTL_EN);
 178 }
 179
 180 static void cs5535audio_playback_disable_dma(struct cs5535audio *cs5535au)
 181 {
 182         cs_writeb(cs5535au, ACC_BM0_CMD, 0);
 183 }
 184
 185 static void cs5535audio_playback_pause_dma(struct cs5535audio *cs5535au)
 186 {
 187         cs_writeb(cs5535au, ACC_BM0_CMD, BM_CTL_PAUSE);
 188 }
 189
 190 static void cs5535audio_playback_setup_prd(struct cs5535audio *cs5535au,
 191                                            u32 prd_addr)
 192 {
 193         cs_writel(cs5535au, ACC_BM0_PRD, prd_addr);
 194 }
 195
 196 static u32 cs5535audio_playback_read_dma_pntr(struct cs5535audio *cs5535au)
 197 {
 198         return cs_readl(cs5535au, ACC_BM0_PNTR);
 199 }
 200
 201 static void cs5535audio_capture_enable_dma(struct cs5535audio *cs5535au)
 202 {
 203         cs_writeb(cs5535au, ACC_BM1_CMD, BM_CTL_EN);
 204 }
 205
 206 static void cs5535audio_capture_disable_dma(struct cs5535audio *cs5535au)
 207 {
 208         cs_writeb(cs5535au, ACC_BM1_CMD, 0);
 209 }
 210
 211 static void cs5535audio_capture_pause_dma(struct cs5535audio *cs5535au)
 212 {
 213         cs_writeb(cs5535au, ACC_BM1_CMD, BM_CTL_PAUSE);
 214 }
 215
 216 static void cs5535audio_capture_setup_prd(struct cs5535audio *cs5535au,
 217                                           u32 prd_addr)
 218 {
 219         cs_writel(cs5535au, ACC_BM1_PRD, prd_addr);
 220 }
 221
 222 static u32 cs5535audio_capture_read_dma_pntr(struct cs5535audio *cs5535au)
 223 {
 224         return cs_readl(cs5535au, ACC_BM1_PNTR);
 225 }
 226
 227 static void cs5535audio_clear_dma_packets(struct cs5535audio *cs5535au,
 228                                           struct cs5535audio_dma *dma,
 229                                           struct snd_pcm_substream *substream)
 230 {
 231         snd_dma_free_pages(&dma->desc_buf);
 232         dma->desc_buf.area = NULL;
 233 }
 234
 235 static int snd_cs5535audio_hw_params(struct snd_pcm_substream *substream,
 236                                      struct snd_pcm_hw_params *hw_params)
 237 {
 238         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
 239         struct cs5535audio_dma *dma = substream->runtime->private_data;
 240         int err;
 241
 242         err = snd_pcm_lib_malloc_pages(substream,
 243                                         params_buffer_bytes(hw_params));
 244         if (err < 0)
 245                 return err;
 246         dma->buf_addr = substream->runtime->dma_addr;
 247         dma->buf_bytes = params_buffer_bytes(hw_params);
 248
 249         err = cs5535audio_build_dma_packets(cs5535au, dma, substream,
 250                                             params_periods(hw_params),
 251                                             params_period_bytes(hw_params));
 252         return err;
 253 }
 254
 255 static int snd_cs5535audio_hw_free(struct snd_pcm_substream *substream)
 256 {
 257         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
 258         struct cs5535audio_dma *dma = substream->runtime->private_data;
 259
 260         cs5535audio_clear_dma_packets(cs5535au, dma, substream);
 261         return snd_pcm_lib_free_pages(substream);
 262 }
 263
 264 static int snd_cs5535audio_playback_prepare(struct snd_pcm_substream *substream)
 265 {
 266         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
 267         return snd_ac97_set_rate(cs5535au->ac97, AC97_PCM_FRONT_DAC_RATE,
 268                                  substream->runtime->rate);
 269 }
 270
 271 static int snd_cs5535audio_trigger(struct snd_pcm_substream *substream, int cmd)
 272 {
 273         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
 274         struct cs5535audio_dma *dma = substream->runtime->private_data;
 275         int err = 0;
 276
 277         spin_lock(&cs5535au->reg_lock);
 278         switch (cmd) {
 279         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 280                 dma->ops->pause_dma(cs5535au);
 281                 break;
 282         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 283                 dma->ops->enable_dma(cs5535au);
 284                 break;
 285         case SNDRV_PCM_TRIGGER_START:
 286                 dma->ops->enable_dma(cs5535au);
 287                 break;
 288         case SNDRV_PCM_TRIGGER_STOP:
 289                 dma->ops->disable_dma(cs5535au);
 290                 break;
 291         default:
 292                 snd_printk(KERN_ERR "unhandled trigger\n");
 293                 err = -EINVAL;
 294                 break;
 295         }
 296         spin_unlock(&cs5535au->reg_lock);
 297         return err;
 298 }
 299
 300 static snd_pcm_uframes_t snd_cs5535audio_pcm_pointer(struct snd_pcm_substream
 301                                                         *substream)
 302 {
 303         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
 304         u32 curdma;
 305         struct cs5535audio_dma *dma;
 306
 307         dma = substream->runtime->private_data;
 308         curdma = dma->ops->read_dma_pntr(cs5535au);
 309         if (curdma < dma->buf_addr) {
 310                 snd_printk(KERN_ERR "curdma=%x < %x bufaddr.\n",
 311                                         curdma, dma->buf_addr);
 312                 return 0;
 313         }
 314         curdma -= dma->buf_addr;
 315         if (curdma >= dma->buf_bytes) {
 316                 snd_printk(KERN_ERR "diff=%x >= %x buf_bytes.\n",
 317                                         curdma, dma->buf_bytes);
 318                 return 0;
 319         }
 320         return bytes_to_frames(substream->runtime, curdma);
 321 }
 322
 323 static int snd_cs5535audio_capture_open(struct snd_pcm_substream *substream)
 324 {
 325         int err;
 326         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
 327         struct snd_pcm_runtime *runtime = substream->runtime;
 328
 329         runtime->hw = snd_cs5535audio_capture;
 330         cs5535au->capture_substream = substream;
 331         runtime->private_data = &(cs5535au->dmas[CS5535AUDIO_DMA_CAPTURE]);
 332         snd_pcm_set_sync(substream);
 333         if ((err = snd_pcm_hw_constraint_integer(runtime,
 334                                          SNDRV_PCM_HW_PARAM_PERIODS)) < 0)
 335                 return err;
 336         return 0;
 337 }
 338
 339 static int snd_cs5535audio_capture_close(struct snd_pcm_substream *substream)
 340 {
 341         return 0;
 342 }
 343
 344 static int snd_cs5535audio_capture_prepare(struct snd_pcm_substream *substream)
 345 {
 346         struct cs5535audio *cs5535au = snd_pcm_substream_chip(substream);
 347         return snd_ac97_set_rate(cs5535au->ac97, AC97_PCM_LR_ADC_RATE,
 348                                  substream->runtime->rate);
 349 }
 350
 351 static struct snd_pcm_ops snd_cs5535audio_playback_ops = {
 352         .open =         snd_cs5535audio_playback_open,
 353         .close =        snd_cs5535audio_playback_close,
 354         .ioctl =        snd_pcm_lib_ioctl,
 355         .hw_params =    snd_cs5535audio_hw_params,
 356         .hw_free =      snd_cs5535audio_hw_free,
 357         .prepare =      snd_cs5535audio_playback_prepare,
 358         .trigger =      snd_cs5535audio_trigger,
 359         .pointer =      snd_cs5535audio_pcm_pointer,
 360 };
 361
 362 static struct snd_pcm_ops snd_cs5535audio_capture_ops = {
 363         .open =         snd_cs5535audio_capture_open,
 364         .close =        snd_cs5535audio_capture_close,
 365         .ioctl =        snd_pcm_lib_ioctl,
 366         .hw_params =    snd_cs5535audio_hw_params,
 367         .hw_free =      snd_cs5535audio_hw_free,
 368         .prepare =      snd_cs5535audio_capture_prepare,
 369         .trigger =      snd_cs5535audio_trigger,
 370         .pointer =      snd_cs5535audio_pcm_pointer,
 371 };
 372
 373 static struct cs5535audio_dma_ops snd_cs5535audio_playback_dma_ops = {
 374         .type = CS5535AUDIO_DMA_PLAYBACK,
 375         .enable_dma = cs5535audio_playback_enable_dma,
 376         .disable_dma = cs5535audio_playback_disable_dma,
 377         .setup_prd = cs5535audio_playback_setup_prd,
 378         .pause_dma = cs5535audio_playback_pause_dma,
 379         .read_dma_pntr = cs5535audio_playback_read_dma_pntr,
 380 };
 381
 382 static struct cs5535audio_dma_ops snd_cs5535audio_capture_dma_ops = {
 383         .type = CS5535AUDIO_DMA_CAPTURE,
 384         .enable_dma = cs5535audio_capture_enable_dma,
 385         .disable_dma = cs5535audio_capture_disable_dma,
 386         .setup_prd = cs5535audio_capture_setup_prd,
 387         .pause_dma = cs5535audio_capture_pause_dma,
 388         .read_dma_pntr = cs5535audio_capture_read_dma_pntr,
 389 };
 390
 391 int __devinit snd_cs5535audio_pcm(struct cs5535audio *cs5535au)
 392 {
 393         struct snd_pcm *pcm;
 394         int err;
 395
 396         err = snd_pcm_new(cs5535au->card, "CS5535 Audio", 0, 1, 1, &pcm);
 397         if (err < 0)
 398                 return err;
 399
 400         cs5535au->dmas[CS5535AUDIO_DMA_PLAYBACK].ops =
 401                                         &snd_cs5535audio_playback_dma_ops;
 402         cs5535au->dmas[CS5535AUDIO_DMA_CAPTURE].ops =
 403                                         &snd_cs5535audio_capture_dma_ops;
 404         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
 405                                         &snd_cs5535audio_playback_ops);
 406         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE,
 407                                         &snd_cs5535audio_capture_ops);
 408
 409         pcm->private_data = cs5535au;
 410         pcm->info_flags = 0;
 411         strcpy(pcm->name, "CS5535 Audio");
 412
 413         snd_pcm_lib_preallocate_pages_for_all(pcm, SNDRV_DMA_TYPE_DEV,
 414                                         snd_dma_pci_data(cs5535au->pci),
 415                                         64*1024, 128*1024);
 416
 417         return 0;
 418 }
 419