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