static void
snd_nm256_capture_start(nm256_t *chip, nm256_stream_t *s, snd_pcm_substream_t *substream)
{
/* program buffer pointers */
snd_nm256_writel(chip, NM_RBUFFER_START, s->buf);
snd_nm256_writel(chip, NM_RBUFFER_END, s->buf + s->dma_size);
snd_nm256_writel(chip, NM_RBUFFER_CURRP, s->buf);
snd_nm256_capture_mark(chip, s);
/* Enable playback engine and interrupts. */
snd_nm256_writeb(chip, NM_RECORD_ENABLE_REG,
NM_RECORD_ENABLE_FLAG | NM_RECORD_FREERUN);
}
static void
snd_nm256_load_one_coefficient(struct nm256 *chip, int stream, u32 port, int which)
{
u32 coeff_buf = chip->coeff_buf[stream];
u16 offset = snd_nm256_get_start_offset(which);
u16 size = coefficient_sizes[which];
snd_nm256_write_buffer(chip, coefficients + offset, coeff_buf, size);
snd_nm256_writel(chip, port, coeff_buf);
/* ??? Record seems to behave differently than playback. */
if (stream == SNDRV_PCM_STREAM_PLAYBACK)
size--;
snd_nm256_writel(chip, port + 4, coeff_buf + size);
}
static void
snd_nm256_capture_start(struct nm256 *chip, struct nm256_stream *s,
struct snd_pcm_substream *substream)
{
snd_nm256_writel(chip, NM_RBUFFER_START, s->buf);
snd_nm256_writel(chip, NM_RBUFFER_END, s->buf + s->dma_size);
snd_nm256_writel(chip, NM_RBUFFER_CURRP, s->buf);
snd_nm256_capture_mark(chip, s);
snd_nm256_writeb(chip, NM_RECORD_ENABLE_REG,
NM_RECORD_ENABLE_FLAG | NM_RECORD_FREERUN);
}
static void
snd_nm256_playback_start(nm256_t *chip, nm256_stream_t *s, snd_pcm_substream_t *substream)
{
/* program buffer pointers */
snd_nm256_writel(chip, NM_PBUFFER_START, s->buf);
snd_nm256_writel(chip, NM_PBUFFER_END, s->buf + s->dma_size - (1 << s->shift));
snd_nm256_writel(chip, NM_PBUFFER_CURRP, s->buf);
snd_nm256_playback_mark(chip, s);
/* Enable playback engine and interrupts. */
snd_nm256_writeb(chip, NM_PLAYBACK_ENABLE_REG,
NM_PLAYBACK_ENABLE_FLAG | NM_PLAYBACK_FREERUN);
/* Enable both channels. */
snd_nm256_writew(chip, NM_AUDIO_MUTE_REG, 0x0);
}
static void
snd_nm256_playback_start(struct nm256 *chip, struct nm256_stream *s,
struct snd_pcm_substream *substream)
{
snd_nm256_writel(chip, NM_PBUFFER_START, s->buf);
snd_nm256_writel(chip, NM_PBUFFER_END, s->buf + s->dma_size - (1 << s->shift));
snd_nm256_writel(chip, NM_PBUFFER_CURRP, s->buf);
snd_nm256_playback_mark(chip, s);
snd_nm256_writeb(chip, NM_PLAYBACK_ENABLE_REG,
NM_PLAYBACK_ENABLE_FLAG | NM_PLAYBACK_FREERUN);
snd_nm256_writew(chip, NM_AUDIO_MUTE_REG, 0x0);
}
static void
snd_nm256_load_coefficient(struct nm256 *chip, int stream, int number)
{
/* The enable register for the specified engine. */
u32 poffset = (stream == SNDRV_PCM_STREAM_CAPTURE ?
NM_RECORD_ENABLE_REG : NM_PLAYBACK_ENABLE_REG);
u32 addr = NM_COEFF_START_OFFSET;
addr += (stream == SNDRV_PCM_STREAM_CAPTURE ?
NM_RECORD_REG_OFFSET : NM_PLAYBACK_REG_OFFSET);
if (snd_nm256_readb(chip, poffset) & 1) {
snd_printd("NM256: Engine was enabled while loading coefficients!\n");
return;
}
/* The recording engine uses coefficient values 8-15. */
number &= 7;
if (stream == SNDRV_PCM_STREAM_CAPTURE)
number += 8;
if (! chip->use_cache) {
snd_nm256_load_one_coefficient(chip, stream, addr, number);
return;
}
if (! chip->coeffs_current) {
snd_nm256_write_buffer(chip, coefficients, chip->all_coeff_buf,
NM_TOTAL_COEFF_COUNT * 4);
chip->coeffs_current = 1;
} else {
u32 base = chip->all_coeff_buf;
u32 offset = snd_nm256_get_start_offset(number);
u32 end_offset = offset + coefficient_sizes[number];
snd_nm256_writel(chip, addr, base + offset);
if (stream == SNDRV_PCM_STREAM_PLAYBACK)
end_offset--;
snd_nm256_writel(chip, addr + 4, base + end_offset);
}
}
/* update the watermark (current period) */
static void snd_nm256_pcm_mark(struct nm256 *chip, struct nm256_stream *s, int reg)
{
s->cur_period++;
s->cur_period %= s->periods;
snd_nm256_writel(chip, reg, s->buf + s->cur_period * s->period_size);
}
