static int __init dac_audio_init(void)
{
int retval;
if ((device_major = register_sound_dsp(&dac_audio_fops, -1)) < 0) {
printk(KERN_ERR "Cannot register dsp device");
return device_major;
}
in_use = 0;
data_buffer = (char *)kmalloc(BUFFER_SIZE, GFP_KERNEL);
if (data_buffer == NULL)
return -ENOMEM;
dac_audio_reset();
rate = 8000;
dac_audio_set_rate();
retval =
request_irq(TIMER1_IRQ, timer1_interrupt, SA_INTERRUPT, MODNAME, 0);
if (retval < 0) {
printk(KERN_ERR "sh_dac_audio: IRQ %d request failed\n",
TIMER1_IRQ);
return retval;
}
return 0;
}
static int __devinit snd_sh_dac_create(struct snd_card *card,
struct platform_device *devptr,
struct snd_sh_dac **rchip)
{
struct snd_sh_dac *chip;
int err;
static struct snd_device_ops ops = {
.dev_free = snd_sh_dac_dev_free,
};
*rchip = NULL;
chip = kzalloc(sizeof(*chip), GFP_KERNEL);
if (chip == NULL)
return -ENOMEM;
chip->card = card;
hrtimer_init(&chip->hrtimer, CLOCK_MONOTONIC, HRTIMER_MODE_REL);
chip->hrtimer.function = sh_dac_audio_timer;
dac_audio_reset(chip);
chip->rate = 8000;
dac_audio_set_rate(chip);
chip->pdata = devptr->dev.platform_data;
chip->data_buffer = kmalloc(chip->pdata->buffer_size, GFP_KERNEL);
if (chip->data_buffer == NULL) {
kfree(chip);
return -ENOMEM;
}
err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
if (err < 0) {
snd_sh_dac_free(chip);
return err;
}
*rchip = chip;
return 0;
}
static int dac_audio_ioctl(struct inode *inode, struct file *file,
unsigned int cmd, unsigned long arg)
{
int val;
switch (cmd) {
case OSS_GETVERSION:
return put_user(SOUND_VERSION, (int *)arg);
case SNDCTL_DSP_SYNC:
dac_audio_sync();
return 0;
case SNDCTL_DSP_RESET:
dac_audio_reset();
return 0;
case SNDCTL_DSP_GETFMTS:
return put_user(AFMT_U8, (int *)arg);
case SNDCTL_DSP_SETFMT:
return put_user(AFMT_U8, (int *)arg);
case SNDCTL_DSP_NONBLOCK:
file->f_flags |= O_NONBLOCK;
return 0;
case SNDCTL_DSP_GETCAPS:
return 0;
case SOUND_PCM_WRITE_RATE:
val = *(int *)arg;
if (val > 0) {
rate = val;
dac_audio_set_rate();
}
return put_user(rate, (int *)arg);
case SNDCTL_DSP_STEREO:
return put_user(0, (int *)arg);
case SOUND_PCM_WRITE_CHANNELS:
return put_user(1, (int *)arg);
case SNDCTL_DSP_SETDUPLEX:
return -EINVAL;
case SNDCTL_DSP_PROFILE:
return -EINVAL;
case SNDCTL_DSP_GETBLKSIZE:
return put_user(BUFFER_SIZE, (int *)arg);
case SNDCTL_DSP_SETFRAGMENT:
return 0;
default:
printk(KERN_ERR "sh_dac_audio: unimplemented ioctl=0x%x\n",
cmd);
return -EINVAL;
}
return -EINVAL;
}
