release/src-rt-6.x.4708/linux/linux-2.6.36/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/delay.h>
  24 #include <sound/core.h>
  25 #include <sound/asoundef.h>
  26 #include "pdaudiocf.h"
  27
  28
  29 /*
  30  * clear the SRAM contents
  31  */
  32 static int pdacf_pcm_clear_sram(struct snd_pdacf *chip)
  33 {
  34         int max_loop = 64 * 1024;
  35
  36         while (inw(chip->port + PDAUDIOCF_REG_RDP) != inw(chip->port + PDAUDIOCF_REG_WDP)) {
  37                 if (max_loop-- < 0)
  38                         return -EIO;
  39                 inw(chip->port + PDAUDIOCF_REG_MD);
  40         }
  41         return 0;
  42 }
  43
  44 /*
  45  * pdacf_pcm_trigger - trigger callback for capture
  46  */
  47 static int pdacf_pcm_trigger(struct snd_pcm_substream *subs, int cmd)
  48 {
  49         struct snd_pdacf *chip = snd_pcm_substream_chip(subs);
  50         struct snd_pcm_runtime *runtime = subs->runtime;
  51         int inc, ret = 0, rate;
  52         unsigned short mask, val, tmp;
  53
  54         if (chip->chip_status & PDAUDIOCF_STAT_IS_STALE)
  55                 return -EBUSY;
  56
  57         switch (cmd) {
  58         case SNDRV_PCM_TRIGGER_START:
  59                 chip->pcm_hwptr = 0;
  60                 chip->pcm_tdone = 0;
  61                 /* fall thru */
  62         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
  63         case SNDRV_PCM_TRIGGER_RESUME:
  64                 mask = 0;
  65                 val = PDAUDIOCF_RECORD;
  66                 inc = 1;
  67                 rate = snd_ak4117_check_rate_and_errors(chip->ak4117, AK4117_CHECK_NO_STAT|AK4117_CHECK_NO_RATE);
  68                 break;
  69         case SNDRV_PCM_TRIGGER_STOP:
  70         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
  71         case SNDRV_PCM_TRIGGER_SUSPEND:
  72                 mask = PDAUDIOCF_RECORD;
  73                 val = 0;
  74                 inc = -1;
  75                 rate = 0;
  76                 break;
  77         default:
  78                 return -EINVAL;
  79         }
  80         spin_lock(&chip->reg_lock);
  81         chip->pcm_running += inc;
  82         tmp = pdacf_reg_read(chip, PDAUDIOCF_REG_SCR);
  83         if (chip->pcm_running) {
  84                 if ((chip->ak4117->rcs0 & AK4117_UNLCK) || runtime->rate != rate) {
  85                         chip->pcm_running -= inc;
  86                         ret = -EIO;
  87                         goto __end;
  88                 }
  89         }
  90         tmp &= ~mask;
  91         tmp |= val;
  92         pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, tmp);
  93       __end:
  94         spin_unlock(&chip->reg_lock);
  95         snd_ak4117_check_rate_and_errors(chip->ak4117, AK4117_CHECK_NO_RATE);
  96         return ret;
  97 }
  98
  99 /*
 100  * pdacf_pcm_hw_params - hw_params callback for playback and capture
 101  */
 102 static int pdacf_pcm_hw_params(struct snd_pcm_substream *subs,
 103                                      struct snd_pcm_hw_params *hw_params)
 104 {
 105         return snd_pcm_lib_alloc_vmalloc_32_buffer
 106                                         (subs, params_buffer_bytes(hw_params));
 107 }
 108
 109 /*
 110  * pdacf_pcm_hw_free - hw_free callback for playback and capture
 111  */
 112 static int pdacf_pcm_hw_free(struct snd_pcm_substream *subs)
 113 {
 114         return snd_pcm_lib_free_vmalloc_buffer(subs);
 115 }
 116
 117 /*
 118  * pdacf_pcm_prepare - prepare callback for playback and capture
 119  */
 120 static int pdacf_pcm_prepare(struct snd_pcm_substream *subs)
 121 {
 122         struct snd_pdacf *chip = snd_pcm_substream_chip(subs);
 123         struct snd_pcm_runtime *runtime = subs->runtime;
 124         u16 val, nval, aval;
 125
 126         if (chip->chip_status & PDAUDIOCF_STAT_IS_STALE)
 127                 return -EBUSY;
 128
 129         chip->pcm_channels = runtime->channels;
 130
 131         chip->pcm_little = snd_pcm_format_little_endian(runtime->format) > 0;
 132 #ifdef SNDRV_LITTLE_ENDIAN
 133         chip->pcm_swab = snd_pcm_format_big_endian(runtime->format) > 0;
 134 #else
 135         chip->pcm_swab = chip->pcm_little;
 136 #endif
 137
 138         if (snd_pcm_format_unsigned(runtime->format))
 139                 chip->pcm_xor = 0x80008000;
 140
 141         if (pdacf_pcm_clear_sram(chip) < 0)
 142                 return -EIO;
 143
 144         val = nval = pdacf_reg_read(chip, PDAUDIOCF_REG_SCR);
 145         nval &= ~(PDAUDIOCF_DATAFMT0|PDAUDIOCF_DATAFMT1);
 146         switch (runtime->format) {
 147         case SNDRV_PCM_FORMAT_S16_LE:
 148         case SNDRV_PCM_FORMAT_S16_BE:
 149                 break;
 150         default: /* 24-bit */
 151                 nval |= PDAUDIOCF_DATAFMT0 | PDAUDIOCF_DATAFMT1;
 152                 break;
 153         }
 154         aval = 0;
 155         chip->pcm_sample = 4;
 156         switch (runtime->format) {
 157         case SNDRV_PCM_FORMAT_S16_LE:
 158         case SNDRV_PCM_FORMAT_S16_BE:
 159                 aval = AK4117_DIF_16R;
 160                 chip->pcm_frame = 2;
 161                 chip->pcm_sample = 2;
 162                 break;
 163         case SNDRV_PCM_FORMAT_S24_3LE:
 164         case SNDRV_PCM_FORMAT_S24_3BE:
 165                 chip->pcm_sample = 3;
 166                 /* fall through */
 167         default: /* 24-bit */
 168                 aval = AK4117_DIF_24R;
 169                 chip->pcm_frame = 3;
 170                 chip->pcm_xor &= 0xffff0000;
 171                 break;
 172         }
 173
 174         if (val != nval) {
 175                 snd_ak4117_reg_write(chip->ak4117, AK4117_REG_IO, AK4117_DIF2|AK4117_DIF1|AK4117_DIF0, aval);
 176                 pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, nval);
 177         }
 178
 179         val = pdacf_reg_read(chip,  PDAUDIOCF_REG_IER);
 180         val &= ~(PDAUDIOCF_IRQLVLEN1);
 181         val |= PDAUDIOCF_IRQLVLEN0;
 182         pdacf_reg_write(chip, PDAUDIOCF_REG_IER, val);
 183
 184         chip->pcm_size = runtime->buffer_size;
 185         chip->pcm_period = runtime->period_size;
 186         chip->pcm_area = runtime->dma_area;
 187
 188         return 0;
 189 }
 190
 191
 192 /*
 193  * capture hw information
 194  */
 195
 196 static struct snd_pcm_hardware pdacf_pcm_capture_hw = {
 197         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 198                                  SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME |
 199                                  SNDRV_PCM_INFO_MMAP_VALID |
 200                                  SNDRV_PCM_INFO_BATCH),
 201         .formats =              SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |
 202                                 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE |
 203                                 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
 204         .rates =                SNDRV_PCM_RATE_32000 |
 205                                 SNDRV_PCM_RATE_44100 |
 206                                 SNDRV_PCM_RATE_48000 |
 207                                 SNDRV_PCM_RATE_88200 |
 208                                 SNDRV_PCM_RATE_96000 |
 209                                 SNDRV_PCM_RATE_176400 |
 210                                 SNDRV_PCM_RATE_192000,
 211         .rate_min =             32000,
 212         .rate_max =             192000,
 213         .channels_min =         1,
 214         .channels_max =         2,
 215         .buffer_bytes_max =     (512*1024),
 216         .period_bytes_min =     8*1024,
 217         .period_bytes_max =     (64*1024),
 218         .periods_min =          2,
 219         .periods_max =          128,
 220         .fifo_size =            0,
 221 };
 222
 223
 224 /*
 225  * pdacf_pcm_capture_open - open callback for capture
 226  */
 227 static int pdacf_pcm_capture_open(struct snd_pcm_substream *subs)
 228 {
 229         struct snd_pcm_runtime *runtime = subs->runtime;
 230         struct snd_pdacf *chip = snd_pcm_substream_chip(subs);
 231
 232         if (chip->chip_status & PDAUDIOCF_STAT_IS_STALE)
 233                 return -EBUSY;
 234
 235         runtime->hw = pdacf_pcm_capture_hw;
 236         runtime->private_data = chip;
 237         chip->pcm_substream = subs;
 238
 239         return 0;
 240 }
 241
 242 /*
 243  * pdacf_pcm_capture_close - close callback for capture
 244  */
 245 static int pdacf_pcm_capture_close(struct snd_pcm_substream *subs)
 246 {
 247         struct snd_pdacf *chip = snd_pcm_substream_chip(subs);
 248
 249         if (!chip)
 250                 return -EINVAL;
 251         pdacf_reinit(chip, 0);
 252         chip->pcm_substream = NULL;
 253         return 0;
 254 }
 255
 256
 257 /*
 258  * pdacf_pcm_capture_pointer - pointer callback for capture
 259  */
 260 static snd_pcm_uframes_t pdacf_pcm_capture_pointer(struct snd_pcm_substream *subs)
 261 {
 262         struct snd_pdacf *chip = snd_pcm_substream_chip(subs);
 263         return chip->pcm_hwptr;
 264 }
 265
 266 /*
 267  * operators for PCM capture
 268  */
 269 static struct snd_pcm_ops pdacf_pcm_capture_ops = {
 270         .open =         pdacf_pcm_capture_open,
 271         .close =        pdacf_pcm_capture_close,
 272         .ioctl =        snd_pcm_lib_ioctl,
 273         .hw_params =    pdacf_pcm_hw_params,
 274         .hw_free =      pdacf_pcm_hw_free,
 275         .prepare =      pdacf_pcm_prepare,
 276         .trigger =      pdacf_pcm_trigger,
 277         .pointer =      pdacf_pcm_capture_pointer,
 278         .page =         snd_pcm_lib_get_vmalloc_page,
 279         .mmap =         snd_pcm_lib_mmap_vmalloc,
 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 }