Exemplo n.º 1
0
static int snd_bcm2835_alsa_probe_dt(struct platform_device *pdev)
{
	struct device *dev = &pdev->dev;
	struct bcm2835_chip *chip;
	struct snd_card *card;
	u32 numchans;
	int err, i;

	err = of_property_read_u32(dev->of_node, "brcm,pwm-channels",
				   &numchans);
	if (err) {
		dev_err(dev, "Failed to get DT property 'brcm,pwm-channels'");
		return err;
	}

	if (numchans == 0 || numchans > MAX_SUBSTREAMS) {
		numchans = MAX_SUBSTREAMS;
		dev_warn(dev, "Illegal 'brcm,pwm-channels' value, will use %u\n",
			 numchans);
	}

	err = snd_card_new(&pdev->dev, -1, NULL, THIS_MODULE, 0, &card);
	if (err) {
		dev_err(dev, "Failed to create soundcard structure\n");
		return err;
	}

	snd_card_set_dev(card, dev);
	strcpy(card->driver, "bcm2835");
	strcpy(card->shortname, "bcm2835 ALSA");
	sprintf(card->longname, "%s", card->shortname);

	err = snd_bcm2835_create(card, pdev, &chip);
	if (err < 0) {
		dev_err(dev, "Failed to create bcm2835 chip\n");
		goto err_free;
	}

	err = snd_bcm2835_new_pcm(chip);
	if (err < 0) {
		dev_err(dev, "Failed to create new bcm2835 pcm device\n");
		goto err_free;
	}

	err = snd_bcm2835_new_spdif_pcm(chip);
	if (err < 0) {
		dev_err(dev, "Failed to create new bcm2835 spdif pcm device\n");
		goto err_free;
	}

	err = snd_bcm2835_new_ctl(chip);
	if (err < 0) {
		dev_err(dev, "Failed to create new bcm2835 ctl\n");
		goto err_free;
	}

	for (i = 0; i < numchans; i++) {
		chip->avail_substreams |= (1 << i);
		chip->pdev[i] = pdev;
	}

	err = snd_card_register(card);
	if (err) {
		dev_err(dev, "Failed to register bcm2835 ALSA card\n");
		goto err_free;
	}

	g_card = card;
	g_chip = chip;
	platform_set_drvdata(pdev, card);
	audio_info("bcm2835 ALSA card created with %u channels\n", numchans);

	return 0;

err_free:
	snd_card_free(card);

	return err;
}
Exemplo n.º 2
0
static int snd_bcm2835_alsa_probe(struct platform_device *pdev)
{
	static int dev;
	bcm2835_chip_t *chip;
	struct snd_card *card;
	int err;

	if (dev >= MAX_SUBSTREAMS)
		return -ENODEV;

	if (!enable[dev]) {
		dev++;
		return -ENOENT;
	}

	if (dev > 0)
		goto add_register_map;

	err = snd_card_create(index[dev], id[dev], THIS_MODULE, 0, &g_card);
	if (err < 0)
		goto out;

	snd_card_set_dev(g_card, &pdev->dev);
	strcpy(g_card->driver, "bcm2835");
	strcpy(g_card->shortname, "bcm2835 ALSA");
	sprintf(g_card->longname, "%s", g_card->shortname);

	err = snd_bcm2835_create(g_card, pdev, &chip);
	if (err < 0) {
		dev_err(&pdev->dev, "Failed to create bcm2835 chip\n");
		goto out_bcm2835_create;
	}

	g_chip = chip;
	err = snd_bcm2835_new_pcm(chip);
	if (err < 0) {
		dev_err(&pdev->dev, "Failed to create new BCM2835 pcm device\n");
		goto out_bcm2835_new_pcm;
	}

	err = snd_bcm2835_new_spdif_pcm(chip);
	if (err < 0) {
		dev_err(&pdev->dev, "Failed to create new BCM2835 spdif pcm device\n");
		goto out_bcm2835_new_spdif;
	}

	err = snd_bcm2835_new_ctl(chip);
	if (err < 0) {
		dev_err(&pdev->dev, "Failed to create new BCM2835 ctl\n");
		goto out_bcm2835_new_ctl;
	}

add_register_map:
	card = g_card;
	chip = g_chip;

	BUG_ON(!(card && chip));

	chip->avail_substreams |= (1 << dev);
	chip->pdev[dev] = pdev;

	if (dev == 0) {
		err = snd_card_register(card);
		if (err < 0) {
			dev_err(&pdev->dev,
				"Failed to register bcm2835 ALSA card \n");
			goto out_card_register;
		}
		platform_set_drvdata(pdev, card);
		audio_info("bcm2835 ALSA card created!\n");
	} else {
		audio_info("bcm2835 ALSA chip created!\n");
		platform_set_drvdata(pdev, (void *)dev);
	}

	dev++;

	return 0;

out_card_register:
out_bcm2835_new_ctl:
out_bcm2835_new_spdif:
out_bcm2835_new_pcm:
out_bcm2835_create:
	BUG_ON(!g_card);
	if (snd_card_free(g_card))
		dev_err(&pdev->dev, "Failed to free Registered alsa card\n");
	g_card = NULL;
out:
	dev = SNDRV_CARDS;	/* stop more avail_substreams from being probed */
	dev_err(&pdev->dev, "BCM2835 ALSA Probe failed !!\n");
	return err;
}