sound/pcmcia/pdaudiocf/pdaudiocf_pcm.c

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Driver for Sound Core PDAudioCF soundcards
   4  *
   5  * PCM part
   6  *
   7  * Copyright (c) 2003 by Jaroslav Kysela <perex@perex.cz>
   8  */
   9
  10 #include <linux/delay.h>
  11 #include <sound/core.h>
  12 #include <sound/asoundef.h>
  13 #include "pdaudiocf.h"
  14
  15
  16 /*
  17  * clear the SRAM contents
  18  */
  19 static int pdacf_pcm_clear_sram(struct snd_pdacf *chip)
  20 {
  21         int max_loop = 64 * 1024;
  22
  23         while (inw(chip->port + PDAUDIOCF_REG_RDP) != inw(chip->port + PDAUDIOCF_REG_WDP)) {
  24                 if (max_loop-- < 0)
  25                         return -EIO;
  26                 inw(chip->port + PDAUDIOCF_REG_MD);
  27         }
  28         return 0;
  29 }
  30
  31 /*
  32  * pdacf_pcm_trigger - trigger callback for capture
  33  */
  34 static int pdacf_pcm_trigger(struct snd_pcm_substream *subs, int cmd)
  35 {
  36         struct snd_pdacf *chip = snd_pcm_substream_chip(subs);
  37         struct snd_pcm_runtime *runtime = subs->runtime;
  38         int inc, ret = 0, rate;
  39         unsigned short mask, val, tmp;
  40
  41         if (chip->chip_status & PDAUDIOCF_STAT_IS_STALE)
  42                 return -EBUSY;
  43
  44         switch (cmd) {
  45         case SNDRV_PCM_TRIGGER_START:
  46                 chip->pcm_hwptr = 0;
  47                 chip->pcm_tdone = 0;
  48                 fallthrough;
  49         case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
  50         case SNDRV_PCM_TRIGGER_RESUME:
  51                 mask = 0;
  52                 val = PDAUDIOCF_RECORD;
  53                 inc = 1;
  54                 rate = snd_ak4117_check_rate_and_errors(chip->ak4117, AK4117_CHECK_NO_STAT|AK4117_CHECK_NO_RATE);
  55                 break;
  56         case SNDRV_PCM_TRIGGER_STOP:
  57         case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
  58         case SNDRV_PCM_TRIGGER_SUSPEND:
  59                 mask = PDAUDIOCF_RECORD;
  60                 val = 0;
  61                 inc = -1;
  62                 rate = 0;
  63                 break;
  64         default:
  65                 return -EINVAL;
  66         }
  67         mutex_lock(&chip->reg_lock);
  68         chip->pcm_running += inc;
  69         tmp = pdacf_reg_read(chip, PDAUDIOCF_REG_SCR);
  70         if (chip->pcm_running) {
  71                 if ((chip->ak4117->rcs0 & AK4117_UNLCK) || runtime->rate != rate) {
  72                         chip->pcm_running -= inc;
  73                         ret = -EIO;
  74                         goto __end;
  75                 }
  76         }
  77         tmp &= ~mask;
  78         tmp |= val;
  79         pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, tmp);
  80       __end:
  81         mutex_unlock(&chip->reg_lock);
  82         snd_ak4117_check_rate_and_errors(chip->ak4117, AK4117_CHECK_NO_RATE);
  83         return ret;
  84 }
  85
  86 /*
  87  * pdacf_pcm_prepare - prepare callback for playback and capture
  88  */
  89 static int pdacf_pcm_prepare(struct snd_pcm_substream *subs)
  90 {
  91         struct snd_pdacf *chip = snd_pcm_substream_chip(subs);
  92         struct snd_pcm_runtime *runtime = subs->runtime;
  93         u16 val, nval, aval;
  94
  95         if (chip->chip_status & PDAUDIOCF_STAT_IS_STALE)
  96                 return -EBUSY;
  97
  98         chip->pcm_channels = runtime->channels;
  99
 100         chip->pcm_little = snd_pcm_format_little_endian(runtime->format) > 0;
 101 #ifdef SNDRV_LITTLE_ENDIAN
 102         chip->pcm_swab = snd_pcm_format_big_endian(runtime->format) > 0;
 103 #else
 104         chip->pcm_swab = chip->pcm_little;
 105 #endif
 106
 107         if (snd_pcm_format_unsigned(runtime->format))
 108                 chip->pcm_xor = 0x80008000;
 109
 110         if (pdacf_pcm_clear_sram(chip) < 0)
 111                 return -EIO;
 112
 113         val = nval = pdacf_reg_read(chip, PDAUDIOCF_REG_SCR);
 114         nval &= ~(PDAUDIOCF_DATAFMT0|PDAUDIOCF_DATAFMT1);
 115         switch (runtime->format) {
 116         case SNDRV_PCM_FORMAT_S16_LE:
 117         case SNDRV_PCM_FORMAT_S16_BE:
 118                 break;
 119         default: /* 24-bit */
 120                 nval |= PDAUDIOCF_DATAFMT0 | PDAUDIOCF_DATAFMT1;
 121                 break;
 122         }
 123         aval = 0;
 124         chip->pcm_sample = 4;
 125         switch (runtime->format) {
 126         case SNDRV_PCM_FORMAT_S16_LE:
 127         case SNDRV_PCM_FORMAT_S16_BE:
 128                 aval = AK4117_DIF_16R;
 129                 chip->pcm_frame = 2;
 130                 chip->pcm_sample = 2;
 131                 break;
 132         case SNDRV_PCM_FORMAT_S24_3LE:
 133         case SNDRV_PCM_FORMAT_S24_3BE:
 134                 chip->pcm_sample = 3;
 135                 fallthrough;
 136         default: /* 24-bit */
 137                 aval = AK4117_DIF_24R;
 138                 chip->pcm_frame = 3;
 139                 chip->pcm_xor &= 0xffff0000;
 140                 break;
 141         }
 142
 143         if (val != nval) {
 144                 snd_ak4117_reg_write(chip->ak4117, AK4117_REG_IO, AK4117_DIF2|AK4117_DIF1|AK4117_DIF0, aval);
 145                 pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, nval);
 146         }
 147
 148         val = pdacf_reg_read(chip,  PDAUDIOCF_REG_IER);
 149         val &= ~(PDAUDIOCF_IRQLVLEN1);
 150         val |= PDAUDIOCF_IRQLVLEN0;
 151         pdacf_reg_write(chip, PDAUDIOCF_REG_IER, val);
 152
 153         chip->pcm_size = runtime->buffer_size;
 154         chip->pcm_period = runtime->period_size;
 155         chip->pcm_area = runtime->dma_area;
 156
 157         return 0;
 158 }
 159
 160
 161 /*
 162  * capture hw information
 163  */
 164
 165 static const struct snd_pcm_hardware pdacf_pcm_capture_hw = {
 166         .info =                 (SNDRV_PCM_INFO_MMAP | SNDRV_PCM_INFO_INTERLEAVED |
 167                                  SNDRV_PCM_INFO_PAUSE | SNDRV_PCM_INFO_RESUME |
 168                                  SNDRV_PCM_INFO_MMAP_VALID |
 169                                  SNDRV_PCM_INFO_BATCH),
 170         .formats =              SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S16_BE |
 171                                 SNDRV_PCM_FMTBIT_S24_3LE | SNDRV_PCM_FMTBIT_S24_3BE |
 172                                 SNDRV_PCM_FMTBIT_S32_LE | SNDRV_PCM_FMTBIT_S32_BE,
 173         .rates =                SNDRV_PCM_RATE_32000 |
 174                                 SNDRV_PCM_RATE_44100 |
 175                                 SNDRV_PCM_RATE_48000 |
 176                                 SNDRV_PCM_RATE_88200 |
 177                                 SNDRV_PCM_RATE_96000 |
 178                                 SNDRV_PCM_RATE_176400 |
 179                                 SNDRV_PCM_RATE_192000,
 180         .rate_min =             32000,
 181         .rate_max =             192000,
 182         .channels_min =         1,
 183         .channels_max =         2,
 184         .buffer_bytes_max =     (512*1024),
 185         .period_bytes_min =     8*1024,
 186         .period_bytes_max =     (64*1024),
 187         .periods_min =          2,
 188         .periods_max =          128,
 189         .fifo_size =            0,
 190 };
 191
 192
 193 /*
 194  * pdacf_pcm_capture_open - open callback for capture
 195  */
 196 static int pdacf_pcm_capture_open(struct snd_pcm_substream *subs)
 197 {
 198         struct snd_pcm_runtime *runtime = subs->runtime;
 199         struct snd_pdacf *chip = snd_pcm_substream_chip(subs);
 200
 201         if (chip->chip_status & PDAUDIOCF_STAT_IS_STALE)
 202                 return -EBUSY;
 203
 204         runtime->hw = pdacf_pcm_capture_hw;
 205         runtime->private_data = chip;
 206         chip->pcm_substream = subs;
 207
 208         return 0;
 209 }
 210
 211 /*
 212  * pdacf_pcm_capture_close - close callback for capture
 213  */
 214 static int pdacf_pcm_capture_close(struct snd_pcm_substream *subs)
 215 {
 216         struct snd_pdacf *chip = snd_pcm_substream_chip(subs);
 217
 218         if (!chip)
 219                 return -EINVAL;
 220         pdacf_reinit(chip, 0);
 221         chip->pcm_substream = NULL;
 222         return 0;
 223 }
 224
 225
 226 /*
 227  * pdacf_pcm_capture_pointer - pointer callback for capture
 228  */
 229 static snd_pcm_uframes_t pdacf_pcm_capture_pointer(struct snd_pcm_substream *subs)
 230 {
 231         struct snd_pdacf *chip = snd_pcm_substream_chip(subs);
 232         return chip->pcm_hwptr;
 233 }
 234
 235 /*
 236  * operators for PCM capture
 237  */
 238 static const struct snd_pcm_ops pdacf_pcm_capture_ops = {
 239         .open =         pdacf_pcm_capture_open,
 240         .close =        pdacf_pcm_capture_close,
 241         .prepare =      pdacf_pcm_prepare,
 242         .trigger =      pdacf_pcm_trigger,
 243         .pointer =      pdacf_pcm_capture_pointer,
 244 };
 245
 246
 247 /*
 248  * snd_pdacf_pcm_new - create and initialize a pcm
 249  */
 250 int snd_pdacf_pcm_new(struct snd_pdacf *chip)
 251 {
 252         struct snd_pcm *pcm;
 253         int err;
 254
 255         err = snd_pcm_new(chip->card, "PDAudioCF", 0, 0, 1, &pcm);
 256         if (err < 0)
 257                 return err;
 258
 259         snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_CAPTURE, &pdacf_pcm_capture_ops);
 260         snd_pcm_set_managed_buffer_all(pcm, SNDRV_DMA_TYPE_VMALLOC,
 261                                        snd_dma_continuous_data(GFP_KERNEL | GFP_DMA32),
 262                                        0, 0);
 263
 264         pcm->private_data = chip;
 265         pcm->info_flags = 0;
 266         pcm->nonatomic = true;
 267         strcpy(pcm->name, chip->card->shortname);
 268         chip->pcm = pcm;
 269
 270         err = snd_ak4117_build(chip->ak4117, pcm->streams[SNDRV_PCM_STREAM_CAPTURE].substream);
 271         if (err < 0)
 272                 return err;
 273
 274         return 0;
 275 }