sound/pcmcia/pdaudiocf/pdaudiocf_pcm.c

   1 /*
   2  * Driver for Sound Core PDAudioCF soundcards
   3  *
   4  * PCM part
   5  *
   6  * Copyright (c) 2003 by Jaroslav Kysela <perex@perex.cz>
   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
  23 #include <sound/driver.h>
  24 #include <linux/slab.h>
  25 #include <linux/vmalloc.h>
  26 #include <linux/delay.h>
  27 #include <sound/core.h>
  28 #include <sound/asoundef.h>
  29 #include "pdaudiocf.h"
  30
  31
  32 /*
  33  * we use a vmalloc'ed (sg-)buffer
  34  */
  35
  36 /* get the physical page pointer on the given offset */
  37 static struct page *snd_pcm_get_vmalloc_page(struct snd_pcm_substream *subs, unsigned long offset)
  38 {
  39         void *pageptr = subs->runtime->dma_area + offset;
  40         return vmalloc_to_page(pageptr);
  41 }
  42
  43 /*
  44  * hw_params callback
  45  * NOTE: this may be called not only once per pcm open!
  46  */
  47 static int snd_pcm_alloc_vmalloc_buffer(struct snd_pcm_substream *subs, size_t size)
  48 {
  49         struct snd_pcm_runtime *runtime = subs->runtime;
  50         if (runtime->dma_area) {
  51                 if (runtime->dma_bytes >= size)
  52                         return 0; /* already enough large */
  53                 vfree(runtime->dma_area);
  54         }
  55         runtime->dma_area = vmalloc_32(size);
  56         if (! runtime->dma_area)
  57                 return -ENOMEM;
  58         runtime->dma_bytes = size;
  59         return 0;
  60 }
  61
  62 /*
  63  * hw_free callback
  64  * NOTE: this may be called not only once per pcm open!
  65  */
  66 static int snd_pcm_free_vmalloc_buffer(struct snd_pcm_substream *subs)
  67 {
  68         struct snd_pcm_runtime *runtime = subs->runtime;
  69
  70         vfree(runtime->dma_area);
  71         runtime->dma_area = NULL;
  72         return 0;
  73 }
  74
  75 /*
  76  * clear the SRAM contents
  77  */
  78 static int pdacf_pcm_clear_sram(struct snd_pdacf *chip)
  79 {
  80         int max_loop = 64 * 1024;
  81
  82         while (inw(chip->port + PDAUDIOCF_REG_RDP) != inw(chip->port + PDAUDIOCF_REG_WDP)) {
  83                 if (max_loop-- < 0)
  84                         return -EIO;
  85                 inw(chip->port + PDAUDIOCF_REG_MD);
  86         }
  87         return 0;
  88 }
  89
  90 /*
  91  * pdacf_pcm_trigger - trigger callback for capture
  92  */
  93 static int pdacf_pcm_trigger(struct snd_pcm_substream *subs, int cmd)
  94 {
  95         struct snd_pdacf *chip = snd_pcm_substream_chip(subs);
  96         struct snd_pcm_runtime *runtime = subs->runtime;
  97         int inc, ret = 0, rate;
  98         unsigned short mask, val, tmp;
  99
 100         if (chip->chip_status & PDAUDIOCF_STAT_IS_STALE)
 101                 return -EBUSY;
 102
 103         switch (cmd) {
 104         case SNDRV_PCM_TRIGGER_START:
 105                 chip->pcm_hwptr = 0;
 106                 chip->pcm_tdone = 0;
 107                 /* fall thru */
 108         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 109         case SNDRV_PCM_TRIGGER_RESUME:
 110                 mask = 0;
 111                 val = PDAUDIOCF_RECORD;
 112                 inc = 1;
 113                 rate = snd_ak4117_check_rate_and_errors(chip->ak4117, AK4117_CHECK_NO_STAT|AK4117_CHECK_NO_RATE);
 114                 break;
 115         case SNDRV_PCM_TRIGGER_STOP:
 116         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 117         case SNDRV_PCM_TRIGGER_SUSPEND:
 118                 mask = PDAUDIOCF_RECORD;
 119                 val = 0;
 120                 inc = -1;
 121                 rate = 0;
 122                 break;
 123         default:
 124                 return -EINVAL;
 125         }
 126         spin_lock(&chip->reg_lock);
 127         chip->pcm_running += inc;
 128         tmp = pdacf_reg_read(chip, PDAUDIOCF_REG_SCR);
 129         if (chip->pcm_running) {
 130                 if ((chip->ak4117->rcs0 & AK4117_UNLCK) || runtime->rate != rate) {
 131                         chip->pcm_running -= inc;
 132                         ret = -EIO;
 133                         goto __end;
 134                 }
 135         }
 136         tmp &= ~mask;
 137         tmp |= val;
 138         pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, tmp);
 139       __end:
 140         spin_unlock(&chip->reg_lock);
 141         snd_ak4117_check_rate_and_errors(chip->ak4117, AK4117_CHECK_NO_RATE);
 142         return ret;
 143 }
 144
 145 /*
 146  * pdacf_pcm_hw_params - hw_params callback for playback and capture
 147  */
 148 static int pdacf_pcm_hw_params(struct snd_pcm_substream *subs,
 149                                      struct snd_pcm_hw_params *hw_params)
 150 {
 151         return snd_pcm_alloc_vmalloc_buffer(subs, params_buffer_bytes(hw_params));
 152 }
 153
 154 /*
 155  * pdacf_pcm_hw_free - hw_free callback for playback and capture
 156  */
 157 static int pdacf_pcm_hw_free(struct snd_pcm_substream *subs)
 158 {
 159         return snd_pcm_free_vmalloc_buffer(subs);
 160 }
 161
 162 /*
 163  * pdacf_pcm_prepare - prepare callback for playback and capture
 164  */
 165 static int pdacf_pcm_prepare(struct snd_pcm_substream *subs)
 166 {
 167         struct snd_pdacf *chip = snd_pcm_substream_chip(subs);
 168         struct snd_pcm_runtime *runtime = subs->runtime;
 169         u16 val, nval, aval;
 170
 171         if (chip->chip_status & PDAUDIOCF_STAT_IS_STALE)
 172                 return -EBUSY;
 173
 174         chip->pcm_channels = runtime->channels;
 175
 176         chip->pcm_little = snd_pcm_format_little_endian(runtime->format) > 0;
 177 #ifdef SNDRV_LITTLE_ENDIAN
 178         chip->pcm_swab = snd_pcm_format_big_endian(runtime->format) > 0;
 179 #else
 180         chip->pcm_swab = chip->pcm_little;
 181 #endif
 182
 183         if (snd_pcm_format_unsigned(runtime->format))
 184                 chip->pcm_xor = 0x80008000;
 185
 186         if (pdacf_pcm_clear_sram(chip) < 0)
 187                 return -EIO;
 188
 189         val = nval = pdacf_reg_read(chip, PDAUDIOCF_REG_SCR);
 190         nval &= ~(PDAUDIOCF_DATAFMT0|PDAUDIOCF_DATAFMT1);
 191         switch (runtime->format) {
 192         case SNDRV_PCM_FORMAT_S16_LE:
 193         case SNDRV_PCM_FORMAT_S16_BE:
 194                 break;
 195         default: /* 24-bit */
 196                 nval |= PDAUDIOCF_DATAFMT0 | PDAUDIOCF_DATAFMT1;
 197                 break;
 198         }
 199         aval = 0;
 200         chip->pcm_sample = 4;
 201         switch (runtime->format) {
 202         case SNDRV_PCM_FORMAT_S16_LE:
 203         case SNDRV_PCM_FORMAT_S16_BE:
 204                 aval = AK4117_DIF_16R;
 205                 chip->pcm_frame = 2;
 206                 chip->pcm_sample = 2;
 207                 break;
 208         case SNDRV_PCM_FORMAT_S24_3LE:
 209         case SNDRV_PCM_FORMAT_S24_3BE:
 210                 chip->pcm_sample = 3;
 211                 /* fall through */
 212         default: /* 24-bit */
 213                 aval = AK4117_DIF_24R;
 214                 chip->pcm_frame = 3;
 215                 chip->pcm_xor &= 0xffff0000;
 216                 break;
 217         }
 218
 219         if (val != nval) {
 220                 snd_ak4117_reg_write(chip->ak4117, AK4117_REG_IO, AK4117_DIF2|AK4117_DIF1|AK4117_DIF0, aval);
 221                 pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, nval);
 222         }
 223
 224         val = pdacf_reg_read(chip,  PDAUDIOCF_REG_IER);
 225         val &= ~(PDAUDIOCF_IRQLVLEN1);
 226         val |= PDAUDIOCF_IRQLVLEN0;
 227         pdacf_reg_write(chip, PDAUDIOCF_REG_IER, val);
 228
 229         chip->pcm_size = runtime->buffer_size;
 230         chip->pcm_period = runtime->period_size;
 231         chip->pcm_area = runtime->dma_area;
 232
 233         return 0;
 234 }
 235
 236
 237 /*
 238  * capture hw information
 239  */
 240
 241 static struct snd_pcm_hardware pdacf_pcm_capture_hw = {
 242         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 243                                  SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME |
 244                                  SNDRV_PCM_INFO_MMAP_VALID),
 245         .formats =              SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |
 246                                 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE |
 247                                 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
 248         .rates =                SNDRV_PCM_RATE_32000 |
 249                                 SNDRV_PCM_RATE_44100 |
 250                                 SNDRV_PCM_RATE_48000 |
 251                                 SNDRV_PCM_RATE_88200 |
 252                                 SNDRV_PCM_RATE_96000 |
 253                                 SNDRV_PCM_RATE_176400 |
 254                                 SNDRV_PCM_RATE_192000,
 255         .rate_min =             32000,
 256         .rate_max =             192000,
 257         .channels_min =         1,
 258         .channels_max =         2,
 259         .buffer_bytes_max =     (512*1024),
 260         .period_bytes_min =     8*1024,
 261         .period_bytes_max =     (64*1024),
 262         .periods_min =          2,
 263         .periods_max =          128,
 264         .fifo_size =            0,
 265 };
 266
 267
 268 /*
 269  * pdacf_pcm_capture_open - open callback for capture
 270  */
 271 static int pdacf_pcm_capture_open(struct snd_pcm_substream *subs)
 272 {
 273         struct snd_pcm_runtime *runtime = subs->runtime;
 274         struct snd_pdacf *chip = snd_pcm_substream_chip(subs);
 275
 276         if (chip->chip_status & PDAUDIOCF_STAT_IS_STALE)
 277                 return -EBUSY;
 278
 279         runtime->hw = pdacf_pcm_capture_hw;
 280         runtime->private_data = chip;
 281         chip->pcm_substream = subs;
 282
 283         return 0;
 284 }
 285
 286 /*
 287  * pdacf_pcm_capture_close - close callback for capture
 288  */
 289 static int pdacf_pcm_capture_close(struct snd_pcm_substream *subs)
 290 {
 291         struct snd_pdacf *chip = snd_pcm_substream_chip(subs);
 292
 293         if (!chip)
 294                 return -EINVAL;
 295         pdacf_reinit(chip, 0);
 296         chip->pcm_substream = NULL;
 297         return 0;
 298 }
 299
 300
 301 /*
 302  * pdacf_pcm_capture_pointer - pointer callback for capture
 303  */
 304 static snd_pcm_uframes_t pdacf_pcm_capture_pointer(struct snd_pcm_substream *subs)
 305 {
 306         struct snd_pdacf *chip = snd_pcm_substream_chip(subs);
 307         return chip->pcm_hwptr;
 308 }
 309
 310 /*
 311  * operators for PCM capture
 312  */
 313 static struct snd_pcm_ops pdacf_pcm_capture_ops = {
 314         .open =         pdacf_pcm_capture_open,
 315         .close =        pdacf_pcm_capture_close,
 316         .ioctl =        snd_pcm_lib_ioctl,
 317         .hw_params =    pdacf_pcm_hw_params,
 318         .hw_free =      pdacf_pcm_hw_free,
 319         .prepare =      pdacf_pcm_prepare,
 320         .trigger =      pdacf_pcm_trigger,
 321         .pointer =      pdacf_pcm_capture_pointer,
 322         .page =         snd_pcm_get_vmalloc_page,
 323 };
 324
 325
 326 /*
 327  * snd_pdacf_pcm_new - create and initialize a pcm
 328  */
 329 int snd_pdacf_pcm_new(struct snd_pdacf *chip)
 330 {
 331         struct snd_pcm *pcm;
 332         int err;
 333
 334         err = snd_pcm_new(chip->card, "PDAudioCF", 0, 0, 1, &pcm);
 335         if (err < 0)
 336                 return err;
 337
 338         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &pdacf_pcm_capture_ops);
 339
 340         pcm->private_data = chip;
 341         pcm->info_flags = 0;
 342         strcpy(pcm->name, chip->card->shortname);
 343         chip->pcm = pcm;
 344
 345         err = snd_ak4117_build(chip->ak4117, pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream);
 346         if (err < 0)
 347                 return err;
 348
 349         return 0;
 350 }