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 #define chip_t  pdacf_t
  32
  33
  34 /*
  35  * we use a vmalloc'ed (sg-)buffer
  36  */
  37
  38 /* get the physical page pointer on the given offset */
  39 static struct page *snd_pcm_get_vmalloc_page(snd_pcm_substream_t *subs, unsigned long offset)
  40 {
  41         void *pageptr = subs->runtime->dma_area + offset;
  42         return vmalloc_to_page(pageptr);
  43 }
  44
  45 /*
  46  * hw_params callback
  47  * NOTE: this may be called not only once per pcm open!
  48  */
  49 static int snd_pcm_alloc_vmalloc_buffer(snd_pcm_substream_t *subs, size_t size)
  50 {
  51         snd_pcm_runtime_t *runtime = subs->runtime;
  52         if (runtime->dma_area) {
  53                 if (runtime->dma_bytes >= size)
  54                         return 0; /* already enough large */
  55                 vfree_nocheck(runtime->dma_area);
  56         }
  57         runtime->dma_area = vmalloc_nocheck(size);
  58         if (! runtime->dma_area)
  59                 return -ENOMEM;
  60         runtime->dma_bytes = size;
  61         return 0;
  62 }
  63
  64 /*
  65  * hw_free callback
  66  * NOTE: this may be called not only once per pcm open!
  67  */
  68 static int snd_pcm_free_vmalloc_buffer(snd_pcm_substream_t *subs)
  69 {
  70         snd_pcm_runtime_t *runtime = subs->runtime;
  71         if (runtime->dma_area) {
  72                 vfree_nocheck(runtime->dma_area);
  73                 runtime->dma_area = NULL;
  74         }
  75         return 0;
  76 }
  77
  78 /*
  79  * clear the SRAM contents
  80  */
  81 static int pdacf_pcm_clear_sram(pdacf_t *chip)
  82 {
  83         int max_loop = 64 * 1024;
  84
  85         while (inw(chip->port + PDAUDIOCF_REG_RDP) != inw(chip->port + PDAUDIOCF_REG_WDP)) {
  86                 if (max_loop-- < 0)
  87                         return -EIO;
  88                 inw(chip->port + PDAUDIOCF_REG_MD);
  89         }
  90         return 0;
  91 }
  92
  93 /*
  94  * pdacf_pcm_trigger - trigger callback for capture
  95  */
  96 static int pdacf_pcm_trigger(snd_pcm_substream_t *subs, int cmd)
  97 {
  98         pdacf_t *chip = snd_pcm_substream_chip(subs);
  99         snd_pcm_runtime_t *runtime = subs->runtime;
 100         int inc, ret = 0, rate;
 101         unsigned short mask, val, tmp;
 102
 103         if (chip->chip_status & PDAUDIOCF_STAT_IS_STALE)
 104                 return -EBUSY;
 105
 106         switch (cmd) {
 107         case SNDRV_PCM_TRIGGER_START:
 108                 chip->pcm_hwptr = 0;
 109                 chip->pcm_tdone = 0;
 110                 /* fall thru */
 111         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
 112         case SNDRV_PCM_TRIGGER_RESUME:
 113                 mask = 0;
 114                 val = PDAUDIOCF_RECORD;
 115                 inc = 1;
 116                 rate = snd_ak4117_check_rate_and_errors(chip->ak4117, AK4117_CHECK_NO_STAT|AK4117_CHECK_NO_RATE);
 117                 break;
 118         case SNDRV_PCM_TRIGGER_STOP:
 119         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
 120         case SNDRV_PCM_TRIGGER_SUSPEND:
 121                 mask = PDAUDIOCF_RECORD;
 122                 val = 0;
 123                 inc = -1;
 124                 rate = 0;
 125                 break;
 126         default:
 127                 return -EINVAL;
 128         }
 129         spin_lock(&chip->reg_lock);
 130         chip->pcm_running += inc;
 131         tmp = pdacf_reg_read(chip, PDAUDIOCF_REG_SCR);
 132         if (chip->pcm_running) {
 133                 if ((chip->ak4117->rcs0 & AK4117_UNLCK) || runtime->rate != rate) {
 134                         chip->pcm_running -= inc;
 135                         ret = -EIO;
 136                         goto __end;
 137                 }
 138         }
 139         tmp &= ~mask;
 140         tmp |= val;
 141         pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, tmp);
 142       __end:
 143         spin_unlock(&chip->reg_lock);
 144         snd_ak4117_check_rate_and_errors(chip->ak4117, AK4117_CHECK_NO_RATE);
 145         return ret;
 146 }
 147
 148 /*
 149  * pdacf_pcm_hw_params - hw_params callback for playback and capture
 150  */
 151 static int pdacf_pcm_hw_params(snd_pcm_substream_t *subs,
 152                                      snd_pcm_hw_params_t *hw_params)
 153 {
 154         return snd_pcm_alloc_vmalloc_buffer(subs, params_buffer_bytes(hw_params));
 155 }
 156
 157 /*
 158  * pdacf_pcm_hw_free - hw_free callback for playback and capture
 159  */
 160 static int pdacf_pcm_hw_free(snd_pcm_substream_t *subs)
 161 {
 162         return snd_pcm_free_vmalloc_buffer(subs);
 163 }
 164
 165 /*
 166  * pdacf_pcm_prepare - prepare callback for playback and capture
 167  */
 168 static int pdacf_pcm_prepare(snd_pcm_substream_t *subs)
 169 {
 170         pdacf_t *chip = snd_pcm_substream_chip(subs);
 171         snd_pcm_runtime_t *runtime = subs->runtime;
 172         u16 val, nval, aval;
 173
 174         if (chip->chip_status & PDAUDIOCF_STAT_IS_STALE)
 175                 return -EBUSY;
 176
 177         chip->pcm_channels = runtime->channels;
 178
 179         chip->pcm_little = snd_pcm_format_little_endian(runtime->format) > 0;
 180 #ifdef SNDRV_LITTLE_ENDIAN
 181         chip->pcm_swab = snd_pcm_format_big_endian(runtime->format) > 0;
 182 #else
 183         chip->pcm_swab = chip->pcm_little;
 184 #endif
 185
 186         if (snd_pcm_format_unsigned(runtime->format))
 187                 chip->pcm_xor = 0x80008000;
 188
 189         if (pdacf_pcm_clear_sram(chip) < 0)
 190                 return -EIO;
 191
 192         val = nval = pdacf_reg_read(chip, PDAUDIOCF_REG_SCR);
 193         nval &= ~(PDAUDIOCF_DATAFMT0|PDAUDIOCF_DATAFMT1);
 194         switch (runtime->format) {
 195         case SNDRV_PCM_FORMAT_S16_LE:
 196         case SNDRV_PCM_FORMAT_S16_BE:
 197                 break;
 198         default: /* 24-bit */
 199                 nval |= PDAUDIOCF_DATAFMT0 | PDAUDIOCF_DATAFMT1;
 200                 break;
 201         }
 202         aval = 0;
 203         chip->pcm_sample = 4;
 204         switch (runtime->format) {
 205         case SNDRV_PCM_FORMAT_S16_LE:
 206         case SNDRV_PCM_FORMAT_S16_BE:
 207                 aval = AK4117_DIF_16R;
 208                 chip->pcm_frame = 2;
 209                 chip->pcm_sample = 2;
 210                 break;
 211         case SNDRV_PCM_FORMAT_S24_3LE:
 212         case SNDRV_PCM_FORMAT_S24_3BE:
 213                 chip->pcm_sample = 3;
 214                 /* fall trough */
 215         default: /* 24-bit */
 216                 aval = AK4117_DIF_24R;
 217                 chip->pcm_frame = 3;
 218                 chip->pcm_xor &= 0xffff0000;
 219                 break;
 220         }
 221
 222         if (val != nval) {
 223                 snd_ak4117_reg_write(chip->ak4117, AK4117_REG_IO, AK4117_DIF2|AK4117_DIF1|AK4117_DIF0, aval);
 224                 pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, nval);
 225         }
 226
 227         val = pdacf_reg_read(chip,  PDAUDIOCF_REG_IER);
 228         val &= ~(PDAUDIOCF_IRQLVLEN1);
 229         val |= PDAUDIOCF_IRQLVLEN0;
 230         pdacf_reg_write(chip, PDAUDIOCF_REG_IER, val);
 231
 232         chip->pcm_size = runtime->buffer_size;
 233         chip->pcm_period = runtime->period_size;
 234         chip->pcm_area = runtime->dma_area;
 235
 236         return 0;
 237 }
 238
 239
 240 /*
 241  * capture hw information
 242  */
 243
 244 static snd_pcm_hardware_t pdacf_pcm_capture_hw = {
 245         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 246                                  SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME |
 247                                  SNDRV_PCM_INFO_MMAP_VALID),
 248         .formats =              SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |
 249                                 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE |
 250                                 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
 251         .rates =                SNDRV_PCM_RATE_32000 |
 252                                 SNDRV_PCM_RATE_44100 |
 253                                 SNDRV_PCM_RATE_48000 |
 254                                 SNDRV_PCM_RATE_88200 |
 255                                 SNDRV_PCM_RATE_96000 |
 256                                 SNDRV_PCM_RATE_176400 |
 257                                 SNDRV_PCM_RATE_192000,
 258         .rate_min =             32000,
 259         .rate_max =             192000,
 260         .channels_min =         1,
 261         .channels_max =         2,
 262         .buffer_bytes_max =     (512*1024),
 263         .period_bytes_min =     8*1024,
 264         .period_bytes_max =     (64*1024),
 265         .periods_min =          2,
 266         .periods_max =          128,
 267         .fifo_size =            0,
 268 };
 269
 270
 271 /*
 272  * pdacf_pcm_capture_open - open callback for capture
 273  */
 274 static int pdacf_pcm_capture_open(snd_pcm_substream_t *subs)
 275 {
 276         snd_pcm_runtime_t *runtime = subs->runtime;
 277         pdacf_t *chip = snd_pcm_substream_chip(subs);
 278
 279         if (chip->chip_status & PDAUDIOCF_STAT_IS_STALE)
 280                 return -EBUSY;
 281
 282         runtime->hw = pdacf_pcm_capture_hw;
 283         runtime->private_data = chip;
 284         chip->pcm_substream = subs;
 285
 286         return 0;
 287 }
 288
 289 /*
 290  * pdacf_pcm_capture_close - close callback for capture
 291  */
 292 static int pdacf_pcm_capture_close(snd_pcm_substream_t *subs)
 293 {
 294         pdacf_t *chip = snd_pcm_substream_chip(subs);
 295
 296         if (!chip)
 297                 return -EINVAL;
 298         pdacf_reinit(chip, 0);
 299         chip->pcm_substream = NULL;
 300         return 0;
 301 }
 302
 303
 304 /*
 305  * pdacf_pcm_capture_pointer - pointer callback for capture
 306  */
 307 static snd_pcm_uframes_t pdacf_pcm_capture_pointer(snd_pcm_substream_t *subs)
 308 {
 309         pdacf_t *chip = snd_pcm_substream_chip(subs);
 310         return chip->pcm_hwptr;
 311 }
 312
 313 /*
 314  * operators for PCM capture
 315  */
 316 static snd_pcm_ops_t pdacf_pcm_capture_ops = {
 317         .open =         pdacf_pcm_capture_open,
 318         .close =        pdacf_pcm_capture_close,
 319         .ioctl =        snd_pcm_lib_ioctl,
 320         .hw_params =    pdacf_pcm_hw_params,
 321         .hw_free =      pdacf_pcm_hw_free,
 322         .prepare =      pdacf_pcm_prepare,
 323         .trigger =      pdacf_pcm_trigger,
 324         .pointer =      pdacf_pcm_capture_pointer,
 325         .page =         snd_pcm_get_vmalloc_page,
 326 };
 327
 328
 329 /*
 330  * free callback for pcm
 331  */
 332 static void snd_pdacf_pcm_free(snd_pcm_t *pcm)
 333 {
 334         pdacf_t *chip = snd_magic_cast(pdacf_t, pcm->private_data, return);
 335         chip->pcm = NULL;
 336 }
 337
 338 /*
 339  * snd_pdacf_pcm_new - create and initialize a pcm
 340  */
 341 int snd_pdacf_pcm_new(pdacf_t *chip)
 342 {
 343         snd_pcm_t *pcm;
 344         int err;
 345
 346         err = snd_pcm_new(chip->card, "PDAudioCF", 0, 0, 1, &pcm);
 347         if (err < 0)
 348                 return err;
 349
 350         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &pdacf_pcm_capture_ops);
 351
 352         pcm->private_data = chip;
 353         pcm->private_free = snd_pdacf_pcm_free;
 354         pcm->info_flags = 0;
 355         strcpy(pcm->name, chip->card->shortname);
 356         chip->pcm = pcm;
 357
 358         err = snd_ak4117_build(chip->ak4117, pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream);
 359         if (err < 0)
 360                 return err;
 361
 362         return 0;
 363 }