1 files changed, 586 insertions, 0 deletions
diff --git a/sound/pci/hda/hda_tegra.c b/sound/pci/hda/hda_tegra.c
new file mode 100644
index 000000000..b567c4bda
--- /dev/null
+++ b/sound/pci/hda/hda_tegra.c
@@ -0,0 +1,586 @@
+/*
+ *
+ * Implementation of primary ALSA driver code base for NVIDIA Tegra HDA.
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
+ * more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <linux/clk.h>
+#include <linux/clocksource.h>
+#include <linux/completion.h>
+#include <linux/delay.h>
+#include <linux/dma-mapping.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/io.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/mutex.h>
+#include <linux/of_device.h>
+#include <linux/slab.h>
+#include <linux/time.h>
+
+#include <sound/core.h>
+#include <sound/initval.h>
+
+#include "hda_codec.h"
+#include "hda_controller.h"
+
+/* Defines for Nvidia Tegra HDA support */
+#define HDA_BAR0           0x8000
+
+#define HDA_CFG_CMD        0x1004
+#define HDA_CFG_BAR0       0x1010
+
+#define HDA_ENABLE_IO_SPACE       (1 << 0)
+#define HDA_ENABLE_MEM_SPACE      (1 << 1)
+#define HDA_ENABLE_BUS_MASTER     (1 << 2)
+#define HDA_ENABLE_SERR           (1 << 8)
+#define HDA_DISABLE_INTR          (1 << 10)
+#define HDA_BAR0_INIT_PROGRAM     0xFFFFFFFF
+#define HDA_BAR0_FINAL_PROGRAM    (1 << 14)
+
+/* IPFS */
+#define HDA_IPFS_CONFIG           0x180
+#define HDA_IPFS_EN_FPCI          0x1
+
+#define HDA_IPFS_FPCI_BAR0        0x80
+#define HDA_FPCI_BAR0_START       0x40
+
+#define HDA_IPFS_INTR_MASK        0x188
+#define HDA_IPFS_EN_INTR          (1 << 16)
+
+/* max number of SDs */
+#define NUM_CAPTURE_SD 1
+#define NUM_PLAYBACK_SD 1
+
+struct hda_tegra {
+	struct azx chip;
+	struct device *dev;
+	struct clk *hda_clk;
+	struct clk *hda2codec_2x_clk;
+	struct clk *hda2hdmi_clk;
+	void __iomem *regs;
+	struct work_struct probe_work;
+};
+
+#ifdef CONFIG_PM
+static int power_save = CONFIG_SND_HDA_POWER_SAVE_DEFAULT;
+module_param(power_save, bint, 0644);
+MODULE_PARM_DESC(power_save,
+		 "Automatic power-saving timeout (in seconds, 0 = disable).");
+#else
+#define power_save	0
+#endif
+
+/*
+ * DMA page allocation ops.
+ */
+static int dma_alloc_pages(struct hdac_bus *bus, int type, size_t size,
+			   struct snd_dma_buffer *buf)
+{
+	return snd_dma_alloc_pages(type, bus->dev, size, buf);
+}
+
+static void dma_free_pages(struct hdac_bus *bus, struct snd_dma_buffer *buf)
+{
+	snd_dma_free_pages(buf);
+}
+
+static int substream_alloc_pages(struct azx *chip,
+				 struct snd_pcm_substream *substream,
+				 size_t size)
+{
+	return snd_pcm_lib_malloc_pages(substream, size);
+}
+
+static int substream_free_pages(struct azx *chip,
+				struct snd_pcm_substream *substream)
+{
+	return snd_pcm_lib_free_pages(substream);
+}
+
+/*
+ * Register access ops. Tegra HDA register access is DWORD only.
+ */
+static void hda_tegra_writel(u32 value, u32 __iomem *addr)
+{
+	writel(value, addr);
+}
+
+static u32 hda_tegra_readl(u32 __iomem *addr)
+{
+	return readl(addr);
+}
+
+static void hda_tegra_writew(u16 value, u16 __iomem  *addr)
+{
+	unsigned int shift = ((unsigned long)(addr) & 0x3) << 3;
+	void __iomem *dword_addr = (void __iomem *)((unsigned long)(addr) & ~0x3);
+	u32 v;
+
+	v = readl(dword_addr);
+	v &= ~(0xffff << shift);
+	v |= value << shift;
+	writel(v, dword_addr);
+}
+
+static u16 hda_tegra_readw(u16 __iomem *addr)
+{
+	unsigned int shift = ((unsigned long)(addr) & 0x3) << 3;
+	void __iomem *dword_addr = (void __iomem *)((unsigned long)(addr) & ~0x3);
+	u32 v;
+
+	v = readl(dword_addr);
+	return (v >> shift) & 0xffff;
+}
+
+static void hda_tegra_writeb(u8 value, u8 __iomem *addr)
+{
+	unsigned int shift = ((unsigned long)(addr) & 0x3) << 3;
+	void __iomem *dword_addr = (void __iomem *)((unsigned long)(addr) & ~0x3);
+	u32 v;
+
+	v = readl(dword_addr);
+	v &= ~(0xff << shift);
+	v |= value << shift;
+	writel(v, dword_addr);
+}
+
+static u8 hda_tegra_readb(u8 __iomem *addr)
+{
+	unsigned int shift = ((unsigned long)(addr) & 0x3) << 3;
+	void __iomem *dword_addr = (void __iomem *)((unsigned long)(addr) & ~0x3);
+	u32 v;
+
+	v = readl(dword_addr);
+	return (v >> shift) & 0xff;
+}
+
+static const struct hdac_io_ops hda_tegra_io_ops = {
+	.reg_writel = hda_tegra_writel,
+	.reg_readl = hda_tegra_readl,
+	.reg_writew = hda_tegra_writew,
+	.reg_readw = hda_tegra_readw,
+	.reg_writeb = hda_tegra_writeb,
+	.reg_readb = hda_tegra_readb,
+	.dma_alloc_pages = dma_alloc_pages,
+	.dma_free_pages = dma_free_pages,
+};
+
+static const struct hda_controller_ops hda_tegra_ops = {
+	.substream_alloc_pages = substream_alloc_pages,
+	.substream_free_pages = substream_free_pages,
+};
+
+static void hda_tegra_init(struct hda_tegra *hda)
+{
+	u32 v;
+
+	/* Enable PCI access */
+	v = readl(hda->regs + HDA_IPFS_CONFIG);
+	v |= HDA_IPFS_EN_FPCI;
+	writel(v, hda->regs + HDA_IPFS_CONFIG);
+
+	/* Enable MEM/IO space and bus master */
+	v = readl(hda->regs + HDA_CFG_CMD);
+	v &= ~HDA_DISABLE_INTR;
+	v |= HDA_ENABLE_MEM_SPACE | HDA_ENABLE_IO_SPACE |
+		HDA_ENABLE_BUS_MASTER | HDA_ENABLE_SERR;
+	writel(v, hda->regs + HDA_CFG_CMD);
+
+	writel(HDA_BAR0_INIT_PROGRAM, hda->regs + HDA_CFG_BAR0);
+	writel(HDA_BAR0_FINAL_PROGRAM, hda->regs + HDA_CFG_BAR0);
+	writel(HDA_FPCI_BAR0_START, hda->regs + HDA_IPFS_FPCI_BAR0);
+
+	v = readl(hda->regs + HDA_IPFS_INTR_MASK);
+	v |= HDA_IPFS_EN_INTR;
+	writel(v, hda->regs + HDA_IPFS_INTR_MASK);
+}
+
+static int hda_tegra_enable_clocks(struct hda_tegra *data)
+{
+	int rc;
+
+	rc = clk_prepare_enable(data->hda_clk);
+	if (rc)
+		return rc;
+	rc = clk_prepare_enable(data->hda2codec_2x_clk);
+	if (rc)
+		goto disable_hda;
+	rc = clk_prepare_enable(data->hda2hdmi_clk);
+	if (rc)
+		goto disable_codec_2x;
+
+	return 0;
+
+disable_codec_2x:
+	clk_disable_unprepare(data->hda2codec_2x_clk);
+disable_hda:
+	clk_disable_unprepare(data->hda_clk);
+	return rc;
+}
+
+#ifdef CONFIG_PM_SLEEP
+static void hda_tegra_disable_clocks(struct hda_tegra *data)
+{
+	clk_disable_unprepare(data->hda2hdmi_clk);
+	clk_disable_unprepare(data->hda2codec_2x_clk);
+	clk_disable_unprepare(data->hda_clk);
+}
+
+/*
+ * power management
+ */
+static int hda_tegra_suspend(struct device *dev)
+{
+	struct snd_card *card = dev_get_drvdata(dev);
+	struct azx *chip = card->private_data;
+	struct hda_tegra *hda = container_of(chip, struct hda_tegra, chip);
+	struct hdac_bus *bus = azx_bus(chip);
+
+	snd_power_change_state(card, SNDRV_CTL_POWER_D3hot);
+
+	azx_stop_chip(chip);
+	synchronize_irq(bus->irq);
+	azx_enter_link_reset(chip);
+	hda_tegra_disable_clocks(hda);
+
+	return 0;
+}
+
+static int hda_tegra_resume(struct device *dev)
+{
+	struct snd_card *card = dev_get_drvdata(dev);
+	struct azx *chip = card->private_data;
+	struct hda_tegra *hda = container_of(chip, struct hda_tegra, chip);
+
+	hda_tegra_enable_clocks(hda);
+
+	hda_tegra_init(hda);
+
+	azx_init_chip(chip, 1);
+
+	snd_power_change_state(card, SNDRV_CTL_POWER_D0);
+
+	return 0;
+}
+#endif /* CONFIG_PM_SLEEP */
+
+static const struct dev_pm_ops hda_tegra_pm = {
+	SET_SYSTEM_SLEEP_PM_OPS(hda_tegra_suspend, hda_tegra_resume)
+};
+
+static int hda_tegra_dev_disconnect(struct snd_device *device)
+{
+	struct azx *chip = device->device_data;
+
+	chip->bus.shutdown = 1;
+	return 0;
+}
+
+/*
+ * destructor
+ */
+static int hda_tegra_dev_free(struct snd_device *device)
+{
+	struct azx *chip = device->device_data;
+	struct hda_tegra *hda = container_of(chip, struct hda_tegra, chip);
+
+	cancel_work_sync(&hda->probe_work);
+	if (azx_bus(chip)->chip_init) {
+		azx_stop_all_streams(chip);
+		azx_stop_chip(chip);
+	}
+
+	azx_free_stream_pages(chip);
+	azx_free_streams(chip);
+	snd_hdac_bus_exit(azx_bus(chip));
+
+	return 0;
+}
+
+static int hda_tegra_init_chip(struct azx *chip, struct platform_device *pdev)
+{
+	struct hda_tegra *hda = container_of(chip, struct hda_tegra, chip);
+	struct hdac_bus *bus = azx_bus(chip);
+	struct device *dev = hda->dev;
+	struct resource *res;
+	int err;
+
+	hda->hda_clk = devm_clk_get(dev, "hda");
+	if (IS_ERR(hda->hda_clk)) {
+		dev_err(dev, "failed to get hda clock\n");
+		return PTR_ERR(hda->hda_clk);
+	}
+	hda->hda2codec_2x_clk = devm_clk_get(dev, "hda2codec_2x");
+	if (IS_ERR(hda->hda2codec_2x_clk)) {
+		dev_err(dev, "failed to get hda2codec_2x clock\n");
+		return PTR_ERR(hda->hda2codec_2x_clk);
+	}
+	hda->hda2hdmi_clk = devm_clk_get(dev, "hda2hdmi");
+	if (IS_ERR(hda->hda2hdmi_clk)) {
+		dev_err(dev, "failed to get hda2hdmi clock\n");
+		return PTR_ERR(hda->hda2hdmi_clk);
+	}
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	hda->regs = devm_ioremap_resource(dev, res);
+	if (IS_ERR(hda->regs))
+		return PTR_ERR(hda->regs);
+
+	bus->remap_addr = hda->regs + HDA_BAR0;
+	bus->addr = res->start + HDA_BAR0;
+
+	err = hda_tegra_enable_clocks(hda);
+	if (err) {
+		dev_err(dev, "failed to get enable clocks\n");
+		return err;
+	}
+
+	hda_tegra_init(hda);
+
+	return 0;
+}
+
+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);
+
+	if (irq_id < 0)
+		return irq_id;
+
+	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;
+	}
+
+	strcpy(card->driver, "tegra-hda");
+	strcpy(card->shortname, "tegra-hda");
+	snprintf(card->longname, sizeof(card->longname),
+		 "%s at 0x%lx irq %i",
+		 card->shortname, bus->addr, bus->irq);
+
+	return 0;
+}
+
+/*
+ * constructor
+ */
+
+static void hda_tegra_probe_work(struct work_struct *work);
+
+static int hda_tegra_create(struct snd_card *card,
+			    unsigned int driver_caps,
+			    struct hda_tegra *hda)
+{
+	static struct snd_device_ops ops = {
+		.dev_disconnect = hda_tegra_dev_disconnect,
+		.dev_free = hda_tegra_dev_free,
+	};
+	struct azx *chip;
+	int err;
+
+	chip = &hda->chip;
+
+	mutex_init(&chip->open_mutex);
+	chip->card = card;
+	chip->ops = &hda_tegra_ops;
+	chip->driver_caps = driver_caps;
+	chip->driver_type = driver_caps & 0xff;
+	chip->dev_index = 0;
+	INIT_LIST_HEAD(&chip->pcm_list);
+
+	chip->codec_probe_mask = -1;
+
+	chip->single_cmd = false;
+	chip->snoop = true;
+
+	INIT_WORK(&hda->probe_work, hda_tegra_probe_work);
+
+	err = azx_bus_init(chip, NULL, &hda_tegra_io_ops);
+	if (err < 0)
+		return err;
+
+	chip->bus.needs_damn_long_delay = 1;
+
+	err = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
+	if (err < 0) {
+		dev_err(card->dev, "Error creating device\n");
+		return err;
+	}
+
+	return 0;
+}
+
+static const struct of_device_id hda_tegra_match[] = {
+	{ .compatible = "nvidia,tegra30-hda" },
+	{},
+};
+MODULE_DEVICE_TABLE(of, hda_tegra_match);
+
+static int hda_tegra_probe(struct platform_device *pdev)
+{
+	const unsigned int driver_flags = AZX_DCAPS_CORBRP_SELF_CLEAR;
+	struct snd_card *card;
+	struct azx *chip;
+	struct hda_tegra *hda;
+	int err;
+
+	hda = devm_kzalloc(&pdev->dev, sizeof(*hda), GFP_KERNEL);
+	if (!hda)
+		return -ENOMEM;
+	hda->dev = &pdev->dev;
+	chip = &hda->chip;
+
+	err = snd_card_new(&pdev->dev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1,
+			   THIS_MODULE, 0, &card);
+	if (err < 0) {
+		dev_err(&pdev->dev, "Error creating card!\n");
+		return err;
+	}
+
+	err = hda_tegra_create(card, driver_flags, hda);
+	if (err < 0)
+		goto out_free;
+	card->private_data = chip;
+
+	dev_set_drvdata(&pdev->dev, card);
+	schedule_work(&hda->probe_work);
+
+	return 0;
+
+out_free:
+	snd_card_free(card);
+	return err;
+}
+
+static void hda_tegra_probe_work(struct work_struct *work)
+{
+	struct hda_tegra *hda = container_of(work, struct hda_tegra, probe_work);
+	struct azx *chip = &hda->chip;
+	struct platform_device *pdev = to_platform_device(hda->dev);
+	int err;
+
+	err = hda_tegra_first_init(chip, pdev);
+	if (err < 0)
+		goto out_free;
+
+	/* create codec instances */
+	err = azx_probe_codecs(chip, 0);
+	if (err < 0)
+		goto out_free;
+
+	err = azx_codec_configure(chip);
+	if (err < 0)
+		goto out_free;
+
+	err = snd_card_register(chip->card);
+	if (err < 0)
+		goto out_free;
+
+	chip->running = 1;
+	snd_hda_set_power_save(&chip->bus, power_save * 1000);
+
+ out_free:
+	return; /* no error return from async probe */
+}
+
+static int hda_tegra_remove(struct platform_device *pdev)
+{
+	return snd_card_free(dev_get_drvdata(&pdev->dev));
+}
+
+static void hda_tegra_shutdown(struct platform_device *pdev)
+{
+	struct snd_card *card = dev_get_drvdata(&pdev->dev);
+	struct azx *chip;
+
+	if (!card)
+		return;
+	chip = card->private_data;
+	if (chip && chip->running)
+		azx_stop_chip(chip);
+}
+
+static struct platform_driver tegra_platform_hda = {
+	.driver = {
+		.name = "tegra-hda",
+		.pm = &hda_tegra_pm,
+		.of_match_table = hda_tegra_match,
+	},
+	.probe = hda_tegra_probe,
+	.remove = hda_tegra_remove,
+	.shutdown = hda_tegra_shutdown,
+};
+module_platform_driver(tegra_platform_hda);
+
+MODULE_DESCRIPTION("Tegra HDA bus driver");
+MODULE_LICENSE("GPL v2");