static int snd_als300_capture_prepare(struct snd_pcm_substream *substream)
{
u32 tmp;
struct snd_als300 *chip = snd_pcm_substream_chip(substream);
struct snd_pcm_runtime *runtime = substream->runtime;
unsigned short period_bytes = snd_pcm_lib_period_bytes(substream);
unsigned short buffer_bytes = snd_pcm_lib_buffer_bytes(substream);
spin_lock_irq(&chip->reg_lock);
tmp = snd_als300_gcr_read(chip->port, RECORD_CONTROL);
tmp &= ~TRANSFER_START;
snd_als300_dbgplay("Period bytes: %d Buffer bytes %d\n", period_bytes,
buffer_bytes);
/* set block size */
tmp &= 0xffff0000;
tmp |= period_bytes - 1;
/* set dma area */
snd_als300_gcr_write(chip->port, RECORD_CONTROL, tmp);
snd_als300_gcr_write(chip->port, RECORD_START,
runtime->dma_addr);
snd_als300_gcr_write(chip->port, RECORD_END,
runtime->dma_addr + buffer_bytes - 1);
spin_unlock_irq(&chip->reg_lock);
return 0;
}
static snd_pcm_uframes_t snd_als300_pointer(struct snd_pcm_substream *substream)
{
u16 current_ptr;
struct snd_als300 *chip = snd_pcm_substream_chip(substream);
struct snd_als300_substream_data *data;
unsigned short period_bytes;
data = substream->runtime->private_data;
period_bytes = snd_pcm_lib_period_bytes(substream);
snd_als300_dbgcallenter();
spin_lock(&chip->reg_lock);
current_ptr = (u16) snd_als300_gcr_read(chip->port,
data->block_counter_register) + 4;
spin_unlock(&chip->reg_lock);
if (current_ptr > period_bytes)
current_ptr = 0;
else
current_ptr = period_bytes - current_ptr;
if (data->period_flipflop == 0)
current_ptr += period_bytes;
snd_als300_dbgplay("Pointer (bytes): %d\n", current_ptr);
snd_als300_dbgcallleave();
return bytes_to_frames(substream->runtime, current_ptr);
}
static int snd_als300_trigger(struct snd_pcm_substream *substream, int cmd)
{
struct snd_als300 *chip = snd_pcm_substream_chip(substream);
u32 tmp;
struct snd_als300_substream_data *data;
unsigned short reg;
int ret = 0;
data = substream->runtime->private_data;
reg = data->control_register;
snd_als300_dbgcallenter();
spin_lock(&chip->reg_lock);
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
tmp = snd_als300_gcr_read(chip->port, reg);
data->period_flipflop = 1;
snd_als300_gcr_write(chip->port, reg, tmp | TRANSFER_START);
snd_als300_dbgplay("TRIGGER START\n");
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
tmp = snd_als300_gcr_read(chip->port, reg);
snd_als300_gcr_write(chip->port, reg, tmp & ~TRANSFER_START);
snd_als300_dbgplay("TRIGGER STOP\n");
break;
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
tmp = snd_als300_gcr_read(chip->port, reg);
snd_als300_gcr_write(chip->port, reg, tmp | FIFO_PAUSE);
snd_als300_dbgplay("TRIGGER PAUSE\n");
break;
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
tmp = snd_als300_gcr_read(chip->port, reg);
snd_als300_gcr_write(chip->port, reg, tmp & ~FIFO_PAUSE);
snd_als300_dbgplay("TRIGGER RELEASE\n");
break;
default:
snd_als300_dbgplay("TRIGGER INVALID\n");
ret = -EINVAL;
}
spin_unlock(&chip->reg_lock);
snd_als300_dbgcallleave();
return ret;
}
static irqreturn_t snd_als300plus_interrupt(int irq, void *dev_id)
{
u8 general, mpu, dram;
struct snd_als300 *chip = dev_id;
struct snd_als300_substream_data *data;
general = inb(chip->port+ALS300P_IRQ_STATUS);
mpu = inb(chip->port+MPU_IRQ_STATUS);
dram = inb(chip->port+ALS300P_DRAM_IRQ_STATUS);
/* shared IRQ, for different device?? Exit ASAP! */
if ((general == 0) && ((mpu & 0x80) == 0) && ((dram & 0x01) == 0))
return IRQ_NONE;
if (general & IRQ_PLAYBACK) {
if (chip->pcm && chip->playback_substream) {
outb(IRQ_PLAYBACK, chip->port+ALS300P_IRQ_STATUS);
data = chip->playback_substream->runtime->private_data;
data->period_flipflop ^= 1;
snd_pcm_period_elapsed(chip->playback_substream);
snd_als300_dbgplay("IRQ_PLAYBACK\n");
}
}
if (general & IRQ_CAPTURE) {
if (chip->pcm && chip->capture_substream) {
outb(IRQ_CAPTURE, chip->port+ALS300P_IRQ_STATUS);
data = chip->capture_substream->runtime->private_data;
data->period_flipflop ^= 1;
snd_pcm_period_elapsed(chip->capture_substream);
snd_als300_dbgplay("IRQ_CAPTURE\n");
}
}
/* FIXME: Ack other interrupt types. Not important right now as
* those other devices aren't enabled. */
return IRQ_HANDLED;
}
static irqreturn_t snd_als300plus_interrupt(int irq, void *dev_id)
{
u8 general, mpu, dram;
struct snd_als300 *chip = dev_id;
struct snd_als300_substream_data *data;
general = inb(chip->port+ALS300P_IRQ_STATUS);
mpu = inb(chip->port+MPU_IRQ_STATUS);
dram = inb(chip->port+ALS300P_DRAM_IRQ_STATUS);
/* */
if ((general == 0) && ((mpu & 0x80) == 0) && ((dram & 0x01) == 0))
return IRQ_NONE;
if (general & IRQ_PLAYBACK) {
if (chip->pcm && chip->playback_substream) {
outb(IRQ_PLAYBACK, chip->port+ALS300P_IRQ_STATUS);
data = chip->playback_substream->runtime->private_data;
data->period_flipflop ^= 1;
snd_pcm_period_elapsed(chip->playback_substream);
snd_als300_dbgplay("IRQ_PLAYBACK\n");
}
}
if (general & IRQ_CAPTURE) {
if (chip->pcm && chip->capture_substream) {
outb(IRQ_CAPTURE, chip->port+ALS300P_IRQ_STATUS);
data = chip->capture_substream->runtime->private_data;
data->period_flipflop ^= 1;
snd_pcm_period_elapsed(chip->capture_substream);
snd_als300_dbgplay("IRQ_CAPTURE\n");
}
}
/*
*/
return IRQ_HANDLED;
}
