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@suse.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(snd_pcm_substream_t *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(snd_pcm_substream_t *subs, size_t size)
  48 {
  49         snd_pcm_runtime_t *runtime = subs->runtime;
  50         if (runtime->dma_area) {
  51                 if (runtime->dma_bytes >= size)
  52                         return 0; /* already enough large */
  53                 vfree_nocheck(runtime->dma_area);
  54         }
  55         runtime->dma_area = vmalloc_nocheck(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(snd_pcm_substream_t *subs)
  67 {
  68         snd_pcm_runtime_t *runtime = subs->runtime;
  69         if (runtime->dma_area) {
  70                 vfree_nocheck(runtime->dma_area);
  71                 runtime->dma_area = NULL;
  72         }
  73         return 0;
  74 }
  75
  76 /*
  77  * clear the SRAM contents
  78  */
  79 static int pdacf_pcm_clear_sram(pdacf_t *chip)
  80 {
  81         int max_loop = 64 * 1024;
  82
  83         while (inw(chip->port + PDAUDIOCF_REG_RDP) != inw(chip->port + PDAUDIOCF_REG_WDP)) {
  84                 if (max_loop-- < 0)
  85                         return -EIO;
  86                 inw(chip->port + PDAUDIOCF_REG_MD);
  87         }
  88         return 0;
  89 }
  90
  91 /*
  92  * pdacf_pcm_trigger - trigger callback for capture
  93  */
  94 static int pdacf_pcm_trigger(snd_pcm_substream_t *subs, int cmd)
  95 {
  96         pdacf_t *chip = snd_pcm_substream_chip(subs);
  97         snd_pcm_runtime_t *runtime = subs->runtime;
  98         int inc, ret = 0, rate;
  99         unsigned short mask, val, tmp;
 100
 101         if (chip->chip_status & PDAUDIOCF_STAT_IS_STALE)
 102                 return -EBUSY;
 103
 104         switch (cmd) {
 105         case SNDRV_PCM_TRIGGER_START:
 106                 chip->pcm_hwptr = 0;
 107                 chip->pcm_tdone = 0;
 108                 /* fall thru */
 109         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 110         case SNDRV_PCM_TRIGGER_RESUME:
 111                 mask = 0;
 112                 val = PDAUDIOCF_RECORD;
 113                 inc = 1;
 114                 rate = snd_ak4117_check_rate_and_errors(chip->ak4117, AK4117_CHECK_NO_STAT|AK4117_CHECK_NO_RATE);
 115                 break;
 116         case SNDRV_PCM_TRIGGER_STOP:
 117         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 118         case SNDRV_PCM_TRIGGER_SUSPEND:
 119                 mask = PDAUDIOCF_RECORD;
 120                 val = 0;
 121                 inc = -1;
 122                 rate = 0;
 123                 break;
 124         default:
 125                 return -EINVAL;
 126         }
 127         spin_lock(&chip->reg_lock);
 128         chip->pcm_running += inc;
 129         tmp = pdacf_reg_read(chip, PDAUDIOCF_REG_SCR);
 130         if (chip->pcm_running) {
 131                 if ((chip->ak4117->rcs0 & AK4117_UNLCK) || runtime->rate != rate) {
 132                         chip->pcm_running -= inc;
 133                         ret = -EIO;
 134                         goto __end;
 135                 }
 136         }
 137         tmp &= ~mask;
 138         tmp |= val;
 139         pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, tmp);
 140       __end:
 141         spin_unlock(&chip->reg_lock);
 142         snd_ak4117_check_rate_and_errors(chip->ak4117, AK4117_CHECK_NO_RATE);
 143         return ret;
 144 }
 145
 146 /*
 147  * pdacf_pcm_hw_params - hw_params callback for playback and capture
 148  */
 149 static int pdacf_pcm_hw_params(snd_pcm_substream_t *subs,
 150                                      snd_pcm_hw_params_t *hw_params)
 151 {
 152         return snd_pcm_alloc_vmalloc_buffer(subs, params_buffer_bytes(hw_params));
 153 }
 154
 155 /*
 156  * pdacf_pcm_hw_free - hw_free callback for playback and capture
 157  */
 158 static int pdacf_pcm_hw_free(snd_pcm_substream_t *subs)
 159 {
 160         return snd_pcm_free_vmalloc_buffer(subs);
 161 }
 162
 163 /*
 164  * pdacf_pcm_prepare - prepare callback for playback and capture
 165  */
 166 static int pdacf_pcm_prepare(snd_pcm_substream_t *subs)
 167 {
 168         pdacf_t *chip = snd_pcm_substream_chip(subs);
 169         snd_pcm_runtime_t *runtime = subs->runtime;
 170         u16 val, nval, aval;
 171
 172         if (chip->chip_status & PDAUDIOCF_STAT_IS_STALE)
 173                 return -EBUSY;
 174
 175         chip->pcm_channels = runtime->channels;
 176
 177         chip->pcm_little = snd_pcm_format_little_endian(runtime->format) > 0;
 178 #ifdef SNDRV_LITTLE_ENDIAN
 179         chip->pcm_swab = snd_pcm_format_big_endian(runtime->format) > 0;
 180 #else
 181         chip->pcm_swab = chip->pcm_little;
 182 #endif
 183
 184         if (snd_pcm_format_unsigned(runtime->format))
 185                 chip->pcm_xor = 0x80008000;
 186
 187         if (pdacf_pcm_clear_sram(chip) < 0)
 188                 return -EIO;
 189
 190         val = nval = pdacf_reg_read(chip, PDAUDIOCF_REG_SCR);
 191         nval &= ~(PDAUDIOCF_DATAFMT0|PDAUDIOCF_DATAFMT1);
 192         switch (runtime->format) {
 193         case SNDRV_PCM_FORMAT_S16_LE:
 194         case SNDRV_PCM_FORMAT_S16_BE:
 195                 break;
 196         default: /* 24-bit */
 197                 nval |= PDAUDIOCF_DATAFMT0 | PDAUDIOCF_DATAFMT1;
 198                 break;
 199         }
 200         aval = 0;
 201         chip->pcm_sample = 4;
 202         switch (runtime->format) {
 203         case SNDRV_PCM_FORMAT_S16_LE:
 204         case SNDRV_PCM_FORMAT_S16_BE:
 205                 aval = AK4117_DIF_16R;
 206                 chip->pcm_frame = 2;
 207                 chip->pcm_sample = 2;
 208                 break;
 209         case SNDRV_PCM_FORMAT_S24_3LE:
 210         case SNDRV_PCM_FORMAT_S24_3BE:
 211                 chip->pcm_sample = 3;
 212                 /* fall trough */
 213         default: /* 24-bit */
 214                 aval = AK4117_DIF_24R;
 215                 chip->pcm_frame = 3;
 216                 chip->pcm_xor &= 0xffff0000;
 217                 break;
 218         }
 219
 220         if (val != nval) {
 221                 snd_ak4117_reg_write(chip->ak4117, AK4117_REG_IO, AK4117_DIF2|AK4117_DIF1|AK4117_DIF0, aval);
 222                 pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, nval);
 223         }
 224
 225         val = pdacf_reg_read(chip,  PDAUDIOCF_REG_IER);
 226         val &= ~(PDAUDIOCF_IRQLVLEN1);
 227         val |= PDAUDIOCF_IRQLVLEN0;
 228         pdacf_reg_write(chip, PDAUDIOCF_REG_IER, val);
 229
 230         chip->pcm_size = runtime->buffer_size;
 231         chip->pcm_period = runtime->period_size;
 232         chip->pcm_area = runtime->dma_area;
 233
 234         return 0;
 235 }
 236
 237
 238 /*
 239  * capture hw information
 240  */
 241
 242 static snd_pcm_hardware_t pdacf_pcm_capture_hw = {
 243         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 244                                  SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME |
 245                                  SNDRV_PCM_INFO_MMAP_VALID),
 246         .formats =              SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |
 247                                 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE |
 248                                 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
 249         .rates =                SNDRV_PCM_RATE_32000 |
 250                                 SNDRV_PCM_RATE_44100 |
 251                                 SNDRV_PCM_RATE_48000 |
 252                                 SNDRV_PCM_RATE_88200 |
 253                                 SNDRV_PCM_RATE_96000 |
 254                                 SNDRV_PCM_RATE_176400 |
 255                                 SNDRV_PCM_RATE_192000,
 256         .rate_min =             32000,
 257         .rate_max =             192000,
 258         .channels_min =         1,
 259         .channels_max =         2,
 260         .buffer_bytes_max =     (512*1024),
 261         .period_bytes_min =     8*1024,
 262         .period_bytes_max =     (64*1024),
 263         .periods_min =          2,
 264         .periods_max =          128,
 265         .fifo_size =            0,
 266 };
 267
 268
 269 /*
 270  * pdacf_pcm_capture_open - open callback for capture
 271  */
 272 static int pdacf_pcm_capture_open(snd_pcm_substream_t *subs)
 273 {
 274         snd_pcm_runtime_t *runtime = subs->runtime;
 275         pdacf_t *chip = snd_pcm_substream_chip(subs);
 276
 277         if (chip->chip_status & PDAUDIOCF_STAT_IS_STALE)
 278                 return -EBUSY;
 279
 280         runtime->hw = pdacf_pcm_capture_hw;
 281         runtime->private_data = chip;
 282         chip->pcm_substream = subs;
 283
 284         return 0;
 285 }
 286
 287 /*
 288  * pdacf_pcm_capture_close - close callback for capture
 289  */
 290 static int pdacf_pcm_capture_close(snd_pcm_substream_t *subs)
 291 {
 292         pdacf_t *chip = snd_pcm_substream_chip(subs);
 293
 294         if (!chip)
 295                 return -EINVAL;
 296         pdacf_reinit(chip, 0);
 297         chip->pcm_substream = NULL;
 298         return 0;
 299 }
 300
 301
 302 /*
 303  * pdacf_pcm_capture_pointer - pointer callback for capture
 304  */
 305 static snd_pcm_uframes_t pdacf_pcm_capture_pointer(snd_pcm_substream_t *subs)
 306 {
 307         pdacf_t *chip = snd_pcm_substream_chip(subs);
 308         return chip->pcm_hwptr;
 309 }
 310
 311 /*
 312  * operators for PCM capture
 313  */
 314 static snd_pcm_ops_t pdacf_pcm_capture_ops = {
 315         .open =         pdacf_pcm_capture_open,
 316         .close =        pdacf_pcm_capture_close,
 317         .ioctl =        snd_pcm_lib_ioctl,
 318         .hw_params =    pdacf_pcm_hw_params,
 319         .hw_free =      pdacf_pcm_hw_free,
 320         .prepare =      pdacf_pcm_prepare,
 321         .trigger =      pdacf_pcm_trigger,
 322         .pointer =      pdacf_pcm_capture_pointer,
 323         .page =         snd_pcm_get_vmalloc_page,
 324 };
 325
 326
 327 /*
 328  * free callback for pcm
 329  */
 330 static void snd_pdacf_pcm_free(snd_pcm_t *pcm)
 331 {
 332         pdacf_t *chip = pcm->private_data;
 333         chip->pcm = NULL;
 334 }
 335
 336 /*
 337  * snd_pdacf_pcm_new - create and initialize a pcm
 338  */
 339 int snd_pdacf_pcm_new(pdacf_t *chip)
 340 {
 341         snd_pcm_t *pcm;
 342         int err;
 343
 344         err = snd_pcm_new(chip->card, "PDAudioCF", 0, 0, 1, &pcm);
 345         if (err < 0)
 346                 return err;
 347
 348         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &pdacf_pcm_capture_ops);
 349
 350         pcm->private_data = chip;
 351         pcm->private_free = snd_pdacf_pcm_free;
 352         pcm->info_flags = 0;
 353         strcpy(pcm->name, chip->card->shortname);
 354         chip->pcm = pcm;
 355
 356         err = snd_ak4117_build(chip->ak4117, pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream);
 357         if (err < 0)
 358                 return err;
 359
 360         return 0;
 361 }