コード例 #1
0
ファイル: hda_tegra.c プロジェクト: Anjali05/linux
static int hda_tegra_first_init(struct azx *chip, struct platform_device *pdev)
{
	struct hdac_bus *bus = azx_bus(chip);
	struct snd_card *card = chip->card;
	int err;
	unsigned short gcap;
	int irq_id = platform_get_irq(pdev, 0);
	const char *sname, *drv_name = "tegra-hda";
	struct device_node *np = pdev->dev.of_node;

	err = hda_tegra_init_chip(chip, pdev);
	if (err)
		return err;

	err = devm_request_irq(chip->card->dev, irq_id, azx_interrupt,
			     IRQF_SHARED, KBUILD_MODNAME, chip);
	if (err) {
		dev_err(chip->card->dev,
			"unable to request IRQ %d, disabling device\n",
			irq_id);
		return err;
	}
	bus->irq = irq_id;

	synchronize_irq(bus->irq);

	gcap = azx_readw(chip, GCAP);
	dev_dbg(card->dev, "chipset global capabilities = 0x%x\n", gcap);

	/* read number of streams from GCAP register instead of using
	 * hardcoded value
	 */
	chip->capture_streams = (gcap >> 8) & 0x0f;
	chip->playback_streams = (gcap >> 12) & 0x0f;
	if (!chip->playback_streams && !chip->capture_streams) {
		/* gcap didn't give any info, switching to old method */
		chip->playback_streams = NUM_PLAYBACK_SD;
		chip->capture_streams = NUM_CAPTURE_SD;
	}
	chip->capture_index_offset = 0;
	chip->playback_index_offset = chip->capture_streams;
	chip->num_streams = chip->playback_streams + chip->capture_streams;

	/* initialize streams */
	err = azx_init_streams(chip);
	if (err < 0) {
		dev_err(card->dev, "failed to initialize streams: %d\n", err);
		return err;
	}

	err = azx_alloc_stream_pages(chip);
	if (err < 0) {
		dev_err(card->dev, "failed to allocate stream pages: %d\n",
			err);
		return err;
	}

	/* initialize chip */
	azx_init_chip(chip, 1);

	/* codec detection */
	if (!bus->codec_mask) {
		dev_err(card->dev, "no codecs found!\n");
		return -ENODEV;
	}

	/* driver name */
	strncpy(card->driver, drv_name, sizeof(card->driver));
	/* shortname for card */
	sname = of_get_property(np, "nvidia,model", NULL);
	if (!sname)
		sname = drv_name;
	if (strlen(sname) > sizeof(card->shortname))
		dev_info(card->dev, "truncating shortname for card\n");
	strncpy(card->shortname, sname, sizeof(card->shortname));

	/* longname for card */
	snprintf(card->longname, sizeof(card->longname),
		 "%s at 0x%lx irq %i",
		 card->shortname, bus->addr, bus->irq);

	return 0;
}
コード例 #2
0
ファイル: hda_tegra.c プロジェクト: alisheikh/ktsan
static int hda_tegra_first_init(struct azx *chip, struct platform_device *pdev)
{
	struct snd_card *card = chip->card;
	int err;
	unsigned short gcap;
	int irq_id = platform_get_irq(pdev, 0);

	err = hda_tegra_init_chip(chip, pdev);
	if (err)
		return err;

	err = devm_request_irq(chip->card->dev, irq_id, azx_interrupt,
			     IRQF_SHARED, KBUILD_MODNAME, chip);
	if (err) {
		dev_err(chip->card->dev,
			"unable to request IRQ %d, disabling device\n",
			irq_id);
		return err;
	}
	chip->irq = irq_id;

	synchronize_irq(chip->irq);

	gcap = azx_readw(chip, GCAP);
	dev_dbg(card->dev, "chipset global capabilities = 0x%x\n", gcap);

	/* read number of streams from GCAP register instead of using
	 * hardcoded value
	 */
	chip->capture_streams = (gcap >> 8) & 0x0f;
	chip->playback_streams = (gcap >> 12) & 0x0f;
	if (!chip->playback_streams && !chip->capture_streams) {
		/* gcap didn't give any info, switching to old method */
		chip->playback_streams = NUM_PLAYBACK_SD;
		chip->capture_streams = NUM_CAPTURE_SD;
	}
	chip->capture_index_offset = 0;
	chip->playback_index_offset = chip->capture_streams;
	chip->num_streams = chip->playback_streams + chip->capture_streams;
	chip->azx_dev = devm_kcalloc(card->dev, chip->num_streams,
				     sizeof(*chip->azx_dev), GFP_KERNEL);
	if (!chip->azx_dev)
		return -ENOMEM;

	err = azx_alloc_stream_pages(chip);
	if (err < 0)
		return err;

	/* initialize streams */
	azx_init_stream(chip);

	/* initialize chip */
	azx_init_chip(chip, 1);

	/* codec detection */
	if (!chip->codec_mask) {
		dev_err(card->dev, "no codecs found!\n");
		return -ENODEV;
	}

	strcpy(card->driver, "tegra-hda");
	strcpy(card->shortname, "tegra-hda");
	snprintf(card->longname, sizeof(card->longname),
		 "%s at 0x%lx irq %i",
		 card->shortname, chip->addr, chip->irq);

	return 0;
}