static irqreturn_t
snd_nm256_interrupt(int irq, void *dev_id)
{
struct nm256 *chip = dev_id;
u16 status;
u8 cbyte;
status = snd_nm256_readw(chip, NM_INT_REG);
/* Not ours. */
if (status == 0)
return snd_nm256_intr_check(chip);
chip->badintrcount = 0;
/* Rather boring; check for individual interrupts and process them. */
spin_lock(&chip->reg_lock);
if (status & NM_PLAYBACK_INT) {
status &= ~NM_PLAYBACK_INT;
NM_ACK_INT(chip, NM_PLAYBACK_INT);
snd_nm256_playback_update(chip);
}
if (status & NM_RECORD_INT) {
status &= ~NM_RECORD_INT;
NM_ACK_INT(chip, NM_RECORD_INT);
snd_nm256_capture_update(chip);
}
if (status & NM_MISC_INT_1) {
status &= ~NM_MISC_INT_1;
NM_ACK_INT(chip, NM_MISC_INT_1);
snd_printd("NM256: Got misc interrupt #1\n");
snd_nm256_writew(chip, NM_INT_REG, 0x8000);
cbyte = snd_nm256_readb(chip, 0x400);
snd_nm256_writeb(chip, 0x400, cbyte | 2);
}
if (status & NM_MISC_INT_2) {
status &= ~NM_MISC_INT_2;
NM_ACK_INT(chip, NM_MISC_INT_2);
snd_printd("NM256: Got misc interrupt #2\n");
cbyte = snd_nm256_readb(chip, 0x400);
snd_nm256_writeb(chip, 0x400, cbyte & ~2);
}
/* Unknown interrupt. */
if (status) {
snd_printd("NM256: Fire in the hole! Unknown status 0x%x\n",
status);
/* Pray. */
NM_ACK_INT(chip, status);
}
spin_unlock(&chip->reg_lock);
return IRQ_HANDLED;
}
/* Stop the play engine. */
static void
snd_nm256_playback_stop(struct nm256 *chip)
{
/* Shut off sound from both channels. */
snd_nm256_writew(chip, NM_AUDIO_MUTE_REG,
NM_AUDIO_MUTE_LEFT | NM_AUDIO_MUTE_RIGHT);
/* Disable play engine. */
snd_nm256_writeb(chip, NM_PLAYBACK_ENABLE_REG, 0);
}
static void
snd_nm256_playback_stop(struct nm256 *chip)
{
snd_nm256_writew(chip, NM_AUDIO_MUTE_REG,
NM_AUDIO_MUTE_LEFT | NM_AUDIO_MUTE_RIGHT);
snd_nm256_writeb(chip, NM_PLAYBACK_ENABLE_REG, 0);
}
/*
* Initialize the hardware.
*/
static void
snd_nm256_init_chip(struct nm256 *chip)
{
/* Reset everything. */
snd_nm256_writeb(chip, 0x0, 0x11);
snd_nm256_writew(chip, 0x214, 0);
/* stop sounds.. */
//snd_nm256_playback_stop(chip);
//snd_nm256_capture_stop(chip);
}
static void
snd_nm256_init_chip(struct nm256 *chip)
{
snd_nm256_writeb(chip, 0x0, 0x11);
snd_nm256_writew(chip, 0x214, 0);
}
/*
* Initialize the hardware.
*/
static void
snd_nm256_init_chip(nm256_t *chip)
{
spin_lock_irq(&chip->reg_lock);
/* Reset everything. */
snd_nm256_writeb(chip, 0x0, 0x11);
snd_nm256_writew(chip, 0x214, 0);
/* stop sounds.. */
//snd_nm256_playback_stop(chip);
//snd_nm256_capture_stop(chip);
spin_unlock_irq(&chip->reg_lock);
}
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_ac97_write(ac97_t *ac97,
unsigned short reg, unsigned short val)
{
nm256_t *chip = ac97->private_data;
int tries = 2;
u32 base;
base = chip->mixer_base;
snd_nm256_ac97_ready(chip);
/* Wait for the write to take, too. */
while (tries-- > 0) {
snd_nm256_writew(chip, base + reg, val);
msleep(1); /* a little delay here seems better.. */
if (snd_nm256_ac97_ready(chip))
return;
}
snd_printd("nm256: ac97 codec not ready..\n");
}
