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