static void dac_audio_reset(struct snd_sh_dac *chip)
{
dac_audio_stop_timer(chip);
chip->buffer_begin = chip->buffer_end = chip->data_buffer;
chip->processed = 0;
chip->empty = 1;
}
static int snd_sh_dac_pcm_close(struct snd_pcm_substream *substream)
{
struct snd_sh_dac *chip = snd_pcm_substream_chip(substream);
chip->substream = NULL;
dac_audio_stop_timer(chip);
chip->pdata->stop(chip->pdata);
return 0;
}
static void dac_audio_stop(void)
{
#ifdef MACH_HP600
u16 v;
#endif
dac_audio_stop_timer();
#ifdef MACH_HP600
v = inw(HD64461_GPADR);
v |= HD64461_GPADR_SPEAKER;
outw(v, HD64461_GPADR);
#endif
sh_dac_disable(CONFIG_SOUND_SH_DAC_AUDIO_CHANNEL);
}
static void dac_audio_stop(void)
{
dac_audio_stop_timer();
if (mach_is_hp6xx()) {
u16 v = inw(HD64461_GPADR);
v |= HD64461_GPADR_SPEAKER;
outw(v, HD64461_GPADR);
}
sh_dac_output(0, CONFIG_SOUND_SH_DAC_AUDIO_CHANNEL);
sh_dac_disable(CONFIG_SOUND_SH_DAC_AUDIO_CHANNEL);
}
static int snd_sh_dac_pcm_trigger(struct snd_pcm_substream *substream, int cmd)
{
struct snd_sh_dac *chip = snd_pcm_substream_chip(substream);
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
dac_audio_start_timer(chip);
break;
case SNDRV_PCM_TRIGGER_STOP:
chip->buffer_begin = chip->buffer_end = chip->data_buffer;
chip->processed = 0;
chip->empty = 1;
dac_audio_stop_timer(chip);
break;
default:
return -EINVAL;
}
return 0;
}
static irqreturn_t timer1_interrupt(int irq, void *dev, struct pt_regs *regs)
{
unsigned long timer_status;
timer_status = ctrl_inw(TMU1_TCR);
timer_status &= ~0x100;
ctrl_outw(timer_status, TMU1_TCR);
if (!empty) {
sh_dac_output(*buffer_begin, CONFIG_SOUND_SH_DAC_AUDIO_CHANNEL);
buffer_begin++;
if (buffer_begin == data_buffer + BUFFER_SIZE)
buffer_begin = data_buffer;
if (buffer_begin == buffer_end) {
empty = 1;
dac_audio_stop_timer();
}
}
return IRQ_HANDLED;
}
static void dac_audio_reset(void)
{
dac_audio_stop_timer();
buffer_begin = buffer_end = data_buffer;
empty = 1;
}
