/**
* hdmi_audio_probe - to create sound card instance for HDMI audio playabck
*
*@haddata: pointer to HAD private data
*@card_id: card for which probe is called
*
* This function is called when the hdmi cable is plugged in. This function
* creates and registers the sound card with ALSA
*/
static int __devinit hdmi_audio_probe(struct platform_device *devptr)
{
int retval;
struct snd_pcm *pcm;
struct snd_card *card;
struct had_callback_ops ops_cb;
struct snd_intelhad *intelhaddata;
struct had_pvt_data *had_stream;
pr_debug("Enter %s\n", __func__);
/* allocate memory for saving internal context and working */
intelhaddata = kzalloc(sizeof(*intelhaddata), GFP_KERNEL);
if (!intelhaddata) {
pr_err("mem alloc failed\n");
return -ENOMEM;
}
had_stream = kzalloc(sizeof(*had_stream), GFP_KERNEL);
if (!had_stream) {
pr_err("mem alloc failed\n");
retval = -ENOMEM;
goto free_haddata;
}
had_data = intelhaddata;
ops_cb.intel_had_event_call_back = had_event_handler;
/* registering with display driver to get access to display APIs */
retval = intel_hdmi_audio_query_capabilities(
ops_cb.intel_had_event_call_back,
&(intelhaddata->reg_ops),
&(intelhaddata->query_ops));
if (retval) {
pr_err("querying display driver APIs failed %#x\n", retval);
goto free_hadstream;
}
mutex_lock(&had_mutex);
spin_lock_init(&intelhaddata->had_spinlock);
intelhaddata->drv_status = HAD_DRV_DISCONNECTED;
/* create a card instance with ALSA framework */
retval = snd_card_create(hdmi_card_index, hdmi_card_id,
THIS_MODULE, 0, &card);
if (retval)
goto unlock_mutex;
intelhaddata->card = card;
intelhaddata->card_id = hdmi_card_id;
intelhaddata->card_index = card->number;
intelhaddata->private_data = had_stream;
intelhaddata->flag_underrun = 0;
intelhaddata->aes_bits = SNDRV_PCM_DEFAULT_CON_SPDIF;
strncpy(card->driver, INTEL_HAD, strlen(INTEL_HAD));
strncpy(card->shortname, INTEL_HAD, strlen(INTEL_HAD));
retval = snd_pcm_new(card, INTEL_HAD, PCM_INDEX, MAX_PB_STREAMS,
MAX_CAP_STREAMS, &pcm);
if (retval)
goto err;
/* setup private data which can be retrieved when required */
pcm->private_data = intelhaddata;
pcm->private_free = snd_intelhad_pcm_free;
pcm->info_flags = 0;
strncpy(pcm->name, card->shortname, strlen(card->shortname));
/* setup the ops for palyabck */
snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK,
&snd_intelhad_playback_ops);
/* allocate dma pages for ALSA stream operations
* memory allocated is based on size, not max value
* thus using same argument for max & size
*/
retval = snd_pcm_lib_preallocate_pages_for_all(pcm,
SNDRV_DMA_TYPE_DEV, card->dev,
HAD_MAX_BUFFER, HAD_MAX_BUFFER);
if (retval)
goto err;
/* internal function call to register device with ALSA */
retval = snd_intelhad_create(intelhaddata, card);
if (retval)
goto err;
card->private_data = &intelhaddata;
retval = snd_card_register(card);
if (retval)
goto err;
/* IEC958 controls */
retval = snd_ctl_add(card, snd_ctl_new1(&had_control_iec958_mask,
intelhaddata));
if (retval < 0)
goto err;
retval = snd_ctl_add(card, snd_ctl_new1(&had_control_iec958,
intelhaddata));
if (retval < 0)
goto err;
/* Allocate memory for flat data */
intelhaddata->flat_data = kzalloc((MAX_SZ_ZERO_BUF), GFP_KERNEL);
if (!intelhaddata->flat_data) {
retval = -ENOMEM;
goto err;
}
mutex_unlock(&had_mutex);
retval = display_register(&had_interface, intelhaddata);
if (retval) {
pr_err("registering with display driver failed %#x\n", retval);
snd_card_free(card);
goto free_hadstream;
}
return retval;
err:
snd_card_free(card);
unlock_mutex:
mutex_unlock(&had_mutex);
free_hadstream:
kfree(had_stream);
free_haddata:
kfree(intelhaddata);
intelhaddata = NULL;
pr_err("Error returned from %s api %#x\n", __func__, retval);
return retval;
}
int display_incoming_messages(char *buffer, short length)
{
if(*(buffer+1) == CMD_REPLY)
{
display_time();
printf("Message from module: ");
switch(*(buffer+2))
{
case REPLY_OK:
printf("ok\n");
break;
case ERROR_CODE_UNKNOWN_CMD:
printf("unknown command\n");
break;
case ERROR_CODE_IDLE:
printf("idle\n");
break;
case ERROR_CODE_FAILED:
printf("command failed\n");
break;
case ERROR_WRONG_PARAM:
printf("wrong parameter\n");
break;
case ERROR_UNEXPECTD_ISR:
printf("unexpected ISR from ADC\n");
break;
case ERROR_FLASH_KEY:
printf("error reading from flash\n");
break;
case ERROR_ADC_ID:
printf("wrong ADC ID\n");
break;
case PEAK_ACTIVE:
printf("peak detection active\n");
break;
default:
printf("unrecognized\n");
return -1;
break;
}
}
else if(*(buffer+1) == CMD_CHECK_ADC)
{
display_time();
printf("ADC check ID ");
if(*(buffer+2))
{
printf("ok\n");
}
else
{
printf("failed\n");
}
}
else if(*(buffer+1) == CMD_READ_REGISTER)
{
display_time();
printf("Read register ");
printf("addr %02x ",*(buffer+2));
display_register((buffer+3), *(buffer)-2);
}
else return -1;
return 0;
}
