/**
* Open ALSA PCM and control device files
* Initial the PCM or control device
*/
static int gaudio_open_snd_dev(struct gaudio *card)
{
struct snd_pcm_file *pcm_file;
struct gaudio_snd_dev *snd;
if (!card)
return -ENODEV;
/* Open control device */
snd = &card->control;
snd->filp = filp_open(fn_cntl, O_RDWR, 0);
if (IS_ERR(snd->filp)) {
int ret = PTR_ERR(snd->filp);
ERROR(card, "unable to open sound control device file: %s\n",
fn_cntl);
snd->filp = NULL;
return ret;
}
snd->card = card;
/* Open PCM playback device and setup substream */
snd = &card->playback;
snd->filp = filp_open(fn_play, O_WRONLY, 0);
if (IS_ERR(snd->filp)) {
int ret = PTR_ERR(snd->filp);
ERROR(card, "No such PCM playback device: %s\n", fn_play);
snd->filp = NULL;
return ret;
}
pcm_file = snd->filp->private_data;
snd->substream = pcm_file->substream;
snd->card = card;
playback_default_hw_params(snd);
/* Open PCM capture device and setup substream */
snd = &card->capture;
snd->filp = filp_open(fn_cap, O_RDONLY, 0);
if (IS_ERR(snd->filp)) {
ERROR(card, "No such PCM capture device: %s\n", fn_cap);
snd->substream = NULL;
snd->card = NULL;
snd->filp = NULL;
} else {
pcm_file = snd->filp->private_data;
snd->substream = pcm_file->substream;
snd->card = card;
}
return 0;
}
static int gaudio_open_snd_dev(struct gaudio *card)
{
struct snd_pcm_file *pcm_file;
struct gaudio_snd_dev *snd;
int res = 0;
if (!card) {
pr_err("%s: Card is NULL", __func__);
return -ENODEV;
}
snd = &card->control;
snd->filp = filp_open(fn_cntl, O_RDWR, 0);
if (IS_ERR(snd->filp)) {
int ret = PTR_ERR(snd->filp);
pr_err("unable to open sound control device file: %s\n",
fn_cntl);
snd->filp = NULL;
return ret;
}
snd->card = card;
snd = &card->playback;
snd->filp = filp_open(fn_play, O_WRONLY, 0);
if (IS_ERR(snd->filp)) {
pr_err("No such PCM playback device: %s\n", fn_play);
snd->filp = NULL;
return -EINVAL;
}
pr_debug("Initialized PCM playback device: %s\n", fn_play);
pcm_file = snd->filp->private_data;
snd->substream = pcm_file->substream;
snd->card = card;
res = playback_default_hw_params(snd);
if (res) {
pr_err("Setting playback HW params failed: err %d", res);
return res;
}
snd = &card->capture;
snd->filp = filp_open(fn_cap, O_RDONLY, 0);
if (IS_ERR(snd->filp)) {
pr_err("No such PCM capture device: %s\n", fn_cap);
snd->substream = NULL;
snd->card = NULL;
snd->filp = NULL;
return -EINVAL;
}
pcm_file = snd->filp->private_data;
snd->substream = pcm_file->substream;
snd->card = card;
res = capture_default_hw_params(snd);
if (res)
pr_err("Setting capture HW params failed: err %d", res);
return res;
}
