/* * pdacf_pcm_trigger - trigger callback for capture */ static int pdacf_pcm_trigger(struct snd_pcm_substream *subs, int cmd) { struct snd_pdacf *chip = snd_pcm_substream_chip(subs); struct snd_pcm_runtime *runtime = subs->runtime; int inc, ret = 0, rate; unsigned short mask, val, tmp; if (chip->chip_status & PDAUDIOCF_STAT_IS_STALE) return -EBUSY; switch (cmd) { case SNDRV_PCM_TRIGGER_START: chip->pcm_hwptr = 0; chip->pcm_tdone = 0; /* fall thru */ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE: case SNDRV_PCM_TRIGGER_RESUME: mask = 0; val = PDAUDIOCF_RECORD; inc = 1; rate = snd_ak4117_check_rate_and_errors(chip->ak4117, AK4117_CHECK_NO_STAT|AK4117_CHECK_NO_RATE); break; case SNDRV_PCM_TRIGGER_STOP: case SNDRV_PCM_TRIGGER_PAUSE_PUSH: case SNDRV_PCM_TRIGGER_SUSPEND: mask = PDAUDIOCF_RECORD; val = 0; inc = -1; rate = 0; break; default: return -EINVAL; } spin_lock(&chip->reg_lock); chip->pcm_running += inc; tmp = pdacf_reg_read(chip, PDAUDIOCF_REG_SCR); if (chip->pcm_running) { if ((chip->ak4117->rcs0 & AK4117_UNLCK) || runtime->rate != rate) { chip->pcm_running -= inc; ret = -EIO; goto __end; } } tmp &= ~mask; tmp |= val; pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, tmp); __end: spin_unlock(&chip->reg_lock); snd_ak4117_check_rate_and_errors(chip->ak4117, AK4117_CHECK_NO_RATE); return ret; }
/* * pdacf_pcm_prepare - prepare callback for playback and capture */ static int pdacf_pcm_prepare(struct snd_pcm_substream *subs) { struct snd_pdacf *chip = snd_pcm_substream_chip(subs); struct snd_pcm_runtime *runtime = subs->runtime; u16 val, nval, aval; if (chip->chip_status & PDAUDIOCF_STAT_IS_STALE) return -EBUSY; chip->pcm_channels = runtime->channels; chip->pcm_little = snd_pcm_format_little_endian(runtime->format) > 0; #ifdef SNDRV_LITTLE_ENDIAN chip->pcm_swab = snd_pcm_format_big_endian(runtime->format) > 0; #else chip->pcm_swab = chip->pcm_little; #endif if (snd_pcm_format_unsigned(runtime->format)) chip->pcm_xor = 0x80008000; if (pdacf_pcm_clear_sram(chip) < 0) return -EIO; val = nval = pdacf_reg_read(chip, PDAUDIOCF_REG_SCR); nval &= ~(PDAUDIOCF_DATAFMT0|PDAUDIOCF_DATAFMT1); switch (runtime->format) { case SNDRV_PCM_FORMAT_S16_LE: case SNDRV_PCM_FORMAT_S16_BE: break; default: /* 24-bit */ nval |= PDAUDIOCF_DATAFMT0 | PDAUDIOCF_DATAFMT1; break; } aval = 0; chip->pcm_sample = 4; switch (runtime->format) { case SNDRV_PCM_FORMAT_S16_LE: case SNDRV_PCM_FORMAT_S16_BE: aval = AK4117_DIF_16R; chip->pcm_frame = 2; chip->pcm_sample = 2; break; case SNDRV_PCM_FORMAT_S24_3LE: case SNDRV_PCM_FORMAT_S24_3BE: chip->pcm_sample = 3; /* fall through */ default: /* 24-bit */ aval = AK4117_DIF_24R; chip->pcm_frame = 3; chip->pcm_xor &= 0xffff0000; break; } if (val != nval) { snd_ak4117_reg_write(chip->ak4117, AK4117_REG_IO, AK4117_DIF2|AK4117_DIF1|AK4117_DIF0, aval); pdacf_reg_write(chip, PDAUDIOCF_REG_SCR, nval); } val = pdacf_reg_read(chip, PDAUDIOCF_REG_IER); val &= ~(PDAUDIOCF_IRQLVLEN1); val |= PDAUDIOCF_IRQLVLEN0; pdacf_reg_write(chip, PDAUDIOCF_REG_IER, val); chip->pcm_size = runtime->buffer_size; chip->pcm_period = runtime->period_size; chip->pcm_area = runtime->dma_area; return 0; }