SAFE public projects git trees. - safe/jmp/linux-2.6/blob - 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/delay.h>
  25 #include <sound/core.h>
  26 #include <sound/asoundef.h>
  27 #include "pdaudiocf.h"
  28
  29
  30 /*
  31  * clear the SRAM contents
  32  */
  33 static int pdacf_pcm_clear_sram(struct snd_pdacf *chip)
  34 {
  35         int max_loop = 64 * 1024;
  36
  37         while (inw(chip->port + PDAUDIOCF_REG_RDP) != inw(chip->port + PDAUDIOCF_REG_WDP)) {
  38                 if (max_loop-- < 0)
  39                         return -EIO;
  40                 inw(chip->port + PDAUDIOCF_REG_MD);
  41         }
  42         return 0;
  43 }
  44
  45 /*
  46  * pdacf_pcm_trigger - trigger callback for capture
  47  */
  48 static int pdacf_pcm_trigger(struct snd_pcm_substream *subs, int cmd)
  49 {
  50         struct snd_pdacf *chip = snd_pcm_substream_chip(subs);
  51         struct snd_pcm_runtime *runtime = subs->runtime;
  52         int inc, ret = 0, rate;
  53         unsigned short mask, val, tmp;
  54
  55         if (chip->chip_status & PDAUDIOCF_STAT_IS_STALE)
  56                 return -EBUSY;
  57
  58         switch (cmd) {
  59         case SNDRV_PCM_TRIGGER_START:
  60                 chip->pcm_hwptr = 0;
  61                 chip->pcm_tdone = 0;
  62                 /* fall thru */
  63         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
  64         case SNDRV_PCM_TRIGGER_RESUME:
  65                 mask = 0;
  66                 val = PDAUDIOCF_RECORD;
  67                 inc = 1;
  68                 rate = snd_ak4117_check_rate_and_errors(chip->ak4117, AK4117_CHECK_NO_STAT|AK4117_CHECK_NO_RATE);
  69                 break;
  70         case SNDRV_PCM_TRIGGER_STOP:
  71         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
  72         case SNDRV_PCM_TRIGGER_SUSPEND:
  73                 mask = PDAUDIOCF_RECORD;
  74                 val = 0;
  75                 inc = -1;
  76                 rate = 0;
  77                 break;
  78         default:
  79                 return -EINVAL;
  80         }
  81         spin_lock(&chip->reg_lock);
  82         chip->pcm_running += inc;
  83         tmp = pdacf_reg_read(chip, PDAUDIOCF_REG_SCR);
  84         if (chip->pcm_running) {
  85                 if ((chip->ak4117->rcs0 & AK4117_UNLCK) || runtime->rate != rate) {
  86                         chip->pcm_running -= inc;
  87                         ret = -EIO;
  88                         goto __end;
  89                 }
  90         }
  91         tmp &= ~mask;
  92         tmp |= val;
  93         pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, tmp);
  94       __end:
  95         spin_unlock(&chip->reg_lock);
  96         snd_ak4117_check_rate_and_errors(chip->ak4117, AK4117_CHECK_NO_RATE);
  97         return ret;
  98 }
  99
 100 /*
 101  * pdacf_pcm_hw_params - hw_params callback for playback and capture
 102  */
 103 static int pdacf_pcm_hw_params(struct snd_pcm_substream *subs,
 104                                      struct snd_pcm_hw_params *hw_params)
 105 {
 106         return snd_pcm_lib_alloc_vmalloc_32_buffer
 107                                         (subs, params_buffer_bytes(hw_params));
 108 }
 109
 110 /*
 111  * pdacf_pcm_hw_free - hw_free callback for playback and capture
 112  */
 113 static int pdacf_pcm_hw_free(struct snd_pcm_substream *subs)
 114 {
 115         return snd_pcm_lib_free_vmalloc_buffer(subs);
 116 }
 117
 118 /*
 119  * pdacf_pcm_prepare - prepare callback for playback and capture
 120  */
 121 static int pdacf_pcm_prepare(struct snd_pcm_substream *subs)
 122 {
 123         struct snd_pdacf *chip = snd_pcm_substream_chip(subs);
 124         struct snd_pcm_runtime *runtime = subs->runtime;
 125         u16 val, nval, aval;
 126
 127         if (chip->chip_status & PDAUDIOCF_STAT_IS_STALE)
 128                 return -EBUSY;
 129
 130         chip->pcm_channels = runtime->channels;
 131
 132         chip->pcm_little = snd_pcm_format_little_endian(runtime->format) > 0;
 133 #ifdef SNDRV_LITTLE_ENDIAN
 134         chip->pcm_swab = snd_pcm_format_big_endian(runtime->format) > 0;
 135 #else
 136         chip->pcm_swab = chip->pcm_little;
 137 #endif
 138
 139         if (snd_pcm_format_unsigned(runtime->format))
 140                 chip->pcm_xor = 0x80008000;
 141
 142         if (pdacf_pcm_clear_sram(chip) < 0)
 143                 return -EIO;
 144
 145         val = nval = pdacf_reg_read(chip, PDAUDIOCF_REG_SCR);
 146         nval &= ~(PDAUDIOCF_DATAFMT0|PDAUDIOCF_DATAFMT1);
 147         switch (runtime->format) {
 148         case SNDRV_PCM_FORMAT_S16_LE:
 149         case SNDRV_PCM_FORMAT_S16_BE:
 150                 break;
 151         default: /* 24-bit */
 152                 nval |= PDAUDIOCF_DATAFMT0 | PDAUDIOCF_DATAFMT1;
 153                 break;
 154         }
 155         aval = 0;
 156         chip->pcm_sample = 4;
 157         switch (runtime->format) {
 158         case SNDRV_PCM_FORMAT_S16_LE:
 159         case SNDRV_PCM_FORMAT_S16_BE:
 160                 aval = AK4117_DIF_16R;
 161                 chip->pcm_frame = 2;
 162                 chip->pcm_sample = 2;
 163                 break;
 164         case SNDRV_PCM_FORMAT_S24_3LE:
 165         case SNDRV_PCM_FORMAT_S24_3BE:
 166                 chip->pcm_sample = 3;
 167                 /* fall through */
 168         default: /* 24-bit */
 169                 aval = AK4117_DIF_24R;
 170                 chip->pcm_frame = 3;
 171                 chip->pcm_xor &= 0xffff0000;
 172                 break;
 173         }
 174
 175         if (val != nval) {
 176                 snd_ak4117_reg_write(chip->ak4117, AK4117_REG_IO, AK4117_DIF2|AK4117_DIF1|AK4117_DIF0, aval);
 177                 pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, nval);
 178         }
 179
 180         val = pdacf_reg_read(chip,  PDAUDIOCF_REG_IER);
 181         val &= ~(PDAUDIOCF_IRQLVLEN1);
 182         val |= PDAUDIOCF_IRQLVLEN0;
 183         pdacf_reg_write(chip, PDAUDIOCF_REG_IER, val);
 184
 185         chip->pcm_size = runtime->buffer_size;
 186         chip->pcm_period = runtime->period_size;
 187         chip->pcm_area = runtime->dma_area;
 188
 189         return 0;
 190 }
 191
 192
 193 /*
 194  * capture hw information
 195  */
 196
 197 static struct snd_pcm_hardware pdacf_pcm_capture_hw = {
 198         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 199                                  SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME |
 200                                  SNDRV_PCM_INFO_MMAP_VALID |
 201                                  SNDRV_PCM_INFO_BATCH),
 202         .formats =              SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |
 203                                 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE |
 204                                 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
 205         .rates =                SNDRV_PCM_RATE_32000 |
 206                                 SNDRV_PCM_RATE_44100 |
 207                                 SNDRV_PCM_RATE_48000 |
 208                                 SNDRV_PCM_RATE_88200 |
 209                                 SNDRV_PCM_RATE_96000 |
 210                                 SNDRV_PCM_RATE_176400 |
 211                                 SNDRV_PCM_RATE_192000,
 212         .rate_min =             32000,
 213         .rate_max =             192000,
 214         .channels_min =         1,
 215         .channels_max =         2,
 216         .buffer_bytes_max =     (512*1024),
 217         .period_bytes_min =     8*1024,
 218         .period_bytes_max =     (64*1024),
 219         .periods_min =          2,
 220         .periods_max =          128,
 221         .fifo_size =            0,
 222 };
 223
 224
 225 /*
 226  * pdacf_pcm_capture_open - open callback for capture
 227  */
 228 static int pdacf_pcm_capture_open(struct snd_pcm_substream *subs)
 229 {
 230         struct snd_pcm_runtime *runtime = subs->runtime;
 231         struct snd_pdacf *chip = snd_pcm_substream_chip(subs);
 232
 233         if (chip->chip_status & PDAUDIOCF_STAT_IS_STALE)
 234                 return -EBUSY;
 235
 236         runtime->hw = pdacf_pcm_capture_hw;
 237         runtime->private_data = chip;
 238         chip->pcm_substream = subs;
 239
 240         return 0;
 241 }
 242
 243 /*
 244  * pdacf_pcm_capture_close - close callback for capture
 245  */
 246 static int pdacf_pcm_capture_close(struct snd_pcm_substream *subs)
 247 {
 248         struct snd_pdacf *chip = snd_pcm_substream_chip(subs);
 249
 250         if (!chip)
 251                 return -EINVAL;
 252         pdacf_reinit(chip, 0);
 253         chip->pcm_substream = NULL;
 254         return 0;
 255 }
 256
 257
 258 /*
 259  * pdacf_pcm_capture_pointer - pointer callback for capture
 260  */
 261 static snd_pcm_uframes_t pdacf_pcm_capture_pointer(struct snd_pcm_substream *subs)
 262 {
 263         struct snd_pdacf *chip = snd_pcm_substream_chip(subs);
 264         return chip->pcm_hwptr;
 265 }
 266
 267 /*
 268  * operators for PCM capture
 269  */
 270 static struct snd_pcm_ops pdacf_pcm_capture_ops = {
 271         .open =         pdacf_pcm_capture_open,
 272         .close =        pdacf_pcm_capture_close,
 273         .ioctl =        snd_pcm_lib_ioctl,
 274         .hw_params =    pdacf_pcm_hw_params,
 275         .hw_free =      pdacf_pcm_hw_free,
 276         .prepare =      pdacf_pcm_prepare,
 277         .trigger =      pdacf_pcm_trigger,
 278         .pointer =      pdacf_pcm_capture_pointer,
 279         .page =         snd_pcm_lib_get_vmalloc_page,
 280 };
 281
 282
 283 /*
 284  * snd_pdacf_pcm_new - create and initialize a pcm
 285  */
 286 int snd_pdacf_pcm_new(struct snd_pdacf *chip)
 287 {
 288         struct snd_pcm *pcm;
 289         int err;
 290
 291         err = snd_pcm_new(chip->card, "PDAudioCF", 0, 0, 1, &pcm);
 292         if (err < 0)
 293                 return err;
 294
 295         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &pdacf_pcm_capture_ops);
 296
 297         pcm->private_data = chip;
 298         pcm->info_flags = 0;
 299         strcpy(pcm->name, chip->card->shortname);
 300         chip->pcm = pcm;
 301
 302         err = snd_ak4117_build(chip->ak4117, pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream);
 303         if (err < 0)
 304                 return err;
 305
 306         return 0;
 307 }