static irqreturn_t
snd_nm256_interrupt(int irq, void *dev_id, struct pt_regs *dummy)
{
nm256_t *chip = dev_id;
u16 status;
u8 cbyte;
status = snd_nm256_readw(chip, NM_INT_REG);
/* Not ours. */
if (status == 0) {
snd_nm256_intr_check(chip);
return IRQ_NONE;
}
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;
}
/* initialize the ac97 into a known state */
static void
snd_nm256_ac97_reset(struct snd_ac97 *ac97)
{
struct nm256 *chip = ac97->private_data;
/* Reset the mixer. 'Tis magic! */
snd_nm256_writeb(chip, 0x6c0, 1);
if (! chip->reset_workaround) {
/* Dell latitude LS will lock up by this */
snd_nm256_writeb(chip, 0x6cc, 0x87);
}
if (! chip->reset_workaround_2) {
/* Dell latitude CSx will lock up by this */
snd_nm256_writeb(chip, 0x6cc, 0x80);
snd_nm256_writeb(chip, 0x6cc, 0x0);
}
if (! chip->in_resume) {
int i;
for (i = 0; i < ARRAY_SIZE(nm256_ac97_init_val); i++) {
/* preload the cache, so as to avoid even a single
* read of the mixer regs
*/
snd_nm256_ac97_write(ac97, nm256_ac97_init_val[i].reg,
nm256_ac97_init_val[i].value);
}
}
}
/*
* set sample rate and format
*/
static void
snd_nm256_set_format(struct nm256 *chip, struct nm256_stream *s,
struct snd_pcm_substream *substream)
{
struct snd_pcm_runtime *runtime = substream->runtime;
int rate_index = snd_nm256_fixed_rate(runtime->rate);
unsigned char ratebits = (rate_index << 4) & NM_RATE_MASK;
s->shift = 0;
if (snd_pcm_format_width(runtime->format) == 16) {
ratebits |= NM_RATE_BITS_16;
s->shift++;
}
if (runtime->channels > 1) {
ratebits |= NM_RATE_STEREO;
s->shift++;
}
runtime->rate = samplerates[rate_index];
switch (substream->stream) {
case SNDRV_PCM_STREAM_PLAYBACK:
snd_nm256_load_coefficient(chip, 0, rate_index); /* 0 = playback */
snd_nm256_writeb(chip,
NM_PLAYBACK_REG_OFFSET + NM_RATE_REG_OFFSET,
ratebits);
break;
case SNDRV_PCM_STREAM_CAPTURE:
snd_nm256_load_coefficient(chip, 1, rate_index); /* 1 = record */
snd_nm256_writeb(chip,
NM_RECORD_REG_OFFSET + NM_RATE_REG_OFFSET,
ratebits);
break;
}
}
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);
if (status == 0)
return snd_nm256_intr_check(chip);
chip->badintrcount = 0;
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);
}
if (status) {
snd_printd("NM256: Fire in the hole! Unknown status 0x%x\n",
status);
NM_ACK_INT(chip, status);
}
spin_unlock(&chip->reg_lock);
return IRQ_HANDLED;
}
/* initialize the ac97 into a known state */
static void
snd_nm256_ac97_reset(ac97_t *ac97)
{
nm256_t *chip = ac97->private_data;
/* Reset the mixer. 'Tis magic! */
snd_nm256_writeb(chip, 0x6c0, 1);
if (! chip->reset_workaround) {
/* Dell latitude LS will lock up by this */
snd_nm256_writeb(chip, 0x6cc, 0x87);
}
snd_nm256_writeb(chip, 0x6cc, 0x80);
snd_nm256_writeb(chip, 0x6cc, 0x0);
}
/* 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);
}
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(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);
}
/*
* 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_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_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_ac97_reset(struct snd_ac97 *ac97)
{
struct nm256 *chip = ac97->private_data;
snd_nm256_writeb(chip, 0x6c0, 1);
if (! chip->reset_workaround) {
snd_nm256_writeb(chip, 0x6cc, 0x87);
}
if (! chip->reset_workaround_2) {
snd_nm256_writeb(chip, 0x6cc, 0x80);
snd_nm256_writeb(chip, 0x6cc, 0x0);
}
if (! chip->in_resume) {
int i;
for (i = 0; i < ARRAY_SIZE(nm256_ac97_init_val); i++) {
snd_nm256_ac97_write(ac97, nm256_ac97_init_val[i].reg,
nm256_ac97_init_val[i].value);
}
}
}
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_capture_stop(struct nm256 *chip)
{
/* Disable recording engine. */
snd_nm256_writeb(chip, NM_RECORD_ENABLE_REG, 0);
}
static void
snd_nm256_capture_stop(struct nm256 *chip)
{
snd_nm256_writeb(chip, NM_RECORD_ENABLE_REG, 0);
}