1 files changed, 433 insertions, 0 deletions

diff --git a/kernel/sound/soc/fsl/mpc8610_hpcd.c b/kernel/sound/soc/fsl/mpc8610_hpcd.c
new file mode 100644
index 000000000..9621b9140
--- /dev/null
+++ b/kernel/sound/soc/fsl/mpc8610_hpcd.c
@@ -0,0 +1,433 @@
+/**
+ * Freescale MPC8610HPCD ALSA SoC Machine driver
+ *
+ * Author: Timur Tabi <timur@freescale.com>
+ *
+ * Copyright 2007-2010 Freescale Semiconductor, Inc.
+ *
+ * This file is licensed under the terms of the GNU General Public License
+ * version 2.  This program is licensed "as is" without any warranty of any
+ * kind, whether express or implied.
+ */
+
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/slab.h>
+#include <sound/soc.h>
+#include <asm/fsl_guts.h>
+
+#include "fsl_dma.h"
+#include "fsl_ssi.h"
+#include "fsl_utils.h"
+
+/* There's only one global utilities register */
+static phys_addr_t guts_phys;
+
+/**
+ * mpc8610_hpcd_data: machine-specific ASoC device data
+ *
+ * This structure contains data for a single sound platform device on an
+ * MPC8610 HPCD.  Some of the data is taken from the device tree.
+ */
+struct mpc8610_hpcd_data {
+	struct snd_soc_dai_link dai[2];
+	struct snd_soc_card card;
+	unsigned int dai_format;
+	unsigned int codec_clk_direction;
+	unsigned int cpu_clk_direction;
+	unsigned int clk_frequency;
+	unsigned int ssi_id;		/* 0 = SSI1, 1 = SSI2, etc */
+	unsigned int dma_id[2];		/* 0 = DMA1, 1 = DMA2, etc */
+	unsigned int dma_channel_id[2]; /* 0 = ch 0, 1 = ch 1, etc*/
+	char codec_dai_name[DAI_NAME_SIZE];
+	char platform_name[2][DAI_NAME_SIZE]; /* One for each DMA channel */
+};
+
+/**
+ * mpc8610_hpcd_machine_probe: initialize the board
+ *
+ * This function is used to initialize the board-specific hardware.
+ *
+ * Here we program the DMACR and PMUXCR registers.
+ */
+static int mpc8610_hpcd_machine_probe(struct snd_soc_card *card)
+{
+	struct mpc8610_hpcd_data *machine_data =
+		container_of(card, struct mpc8610_hpcd_data, card);
+	struct ccsr_guts __iomem *guts;
+
+	guts = ioremap(guts_phys, sizeof(struct ccsr_guts));
+	if (!guts) {
+		dev_err(card->dev, "could not map global utilities\n");
+		return -ENOMEM;
+	}
+
+	/* Program the signal routing between the SSI and the DMA */
+	guts_set_dmacr(guts, machine_data->dma_id[0],
+		       machine_data->dma_channel_id[0],
+		       CCSR_GUTS_DMACR_DEV_SSI);
+	guts_set_dmacr(guts, machine_data->dma_id[1],
+		       machine_data->dma_channel_id[1],
+		       CCSR_GUTS_DMACR_DEV_SSI);
+
+	guts_set_pmuxcr_dma(guts, machine_data->dma_id[0],
+			    machine_data->dma_channel_id[0], 0);
+	guts_set_pmuxcr_dma(guts, machine_data->dma_id[1],
+			    machine_data->dma_channel_id[1], 0);
+
+	switch (machine_data->ssi_id) {
+	case 0:
+		clrsetbits_be32(&guts->pmuxcr,
+			CCSR_GUTS_PMUXCR_SSI1_MASK, CCSR_GUTS_PMUXCR_SSI1_SSI);
+		break;
+	case 1:
+		clrsetbits_be32(&guts->pmuxcr,
+			CCSR_GUTS_PMUXCR_SSI2_MASK, CCSR_GUTS_PMUXCR_SSI2_SSI);
+		break;
+	}
+
+	iounmap(guts);
+
+	return 0;
+}
+
+/**
+ * mpc8610_hpcd_startup: program the board with various hardware parameters
+ *
+ * This function takes board-specific information, like clock frequencies
+ * and serial data formats, and passes that information to the codec and
+ * transport drivers.
+ */
+static int mpc8610_hpcd_startup(struct snd_pcm_substream *substream)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct mpc8610_hpcd_data *machine_data =
+		container_of(rtd->card, struct mpc8610_hpcd_data, card);
+	struct device *dev = rtd->card->dev;
+	int ret = 0;
+
+	/* Tell the codec driver what the serial protocol is. */
+	ret = snd_soc_dai_set_fmt(rtd->codec_dai, machine_data->dai_format);
+	if (ret < 0) {
+		dev_err(dev, "could not set codec driver audio format\n");
+		return ret;
+	}
+
+	/*
+	 * Tell the codec driver what the MCLK frequency is, and whether it's
+	 * a slave or master.
+	 */
+	ret = snd_soc_dai_set_sysclk(rtd->codec_dai, 0,
+				     machine_data->clk_frequency,
+				     machine_data->codec_clk_direction);
+	if (ret < 0) {
+		dev_err(dev, "could not set codec driver clock params\n");
+		return ret;
+	}
+
+	return 0;
+}
+
+/**
+ * mpc8610_hpcd_machine_remove: Remove the sound device
+ *
+ * This function is called to remove the sound device for one SSI.  We
+ * de-program the DMACR and PMUXCR register.
+ */
+static int mpc8610_hpcd_machine_remove(struct snd_soc_card *card)
+{
+	struct mpc8610_hpcd_data *machine_data =
+		container_of(card, struct mpc8610_hpcd_data, card);
+	struct ccsr_guts __iomem *guts;
+
+	guts = ioremap(guts_phys, sizeof(struct ccsr_guts));
+	if (!guts) {
+		dev_err(card->dev, "could not map global utilities\n");
+		return -ENOMEM;
+	}
+
+	/* Restore the signal routing */
+
+	guts_set_dmacr(guts, machine_data->dma_id[0],
+		       machine_data->dma_channel_id[0], 0);
+	guts_set_dmacr(guts, machine_data->dma_id[1],
+		       machine_data->dma_channel_id[1], 0);
+
+	switch (machine_data->ssi_id) {
+	case 0:
+		clrsetbits_be32(&guts->pmuxcr,
+			CCSR_GUTS_PMUXCR_SSI1_MASK, CCSR_GUTS_PMUXCR_SSI1_LA);
+		break;
+	case 1:
+		clrsetbits_be32(&guts->pmuxcr,
+			CCSR_GUTS_PMUXCR_SSI2_MASK, CCSR_GUTS_PMUXCR_SSI2_LA);
+		break;
+	}
+
+	iounmap(guts);
+
+	return 0;
+}
+
+/**
+ * mpc8610_hpcd_ops: ASoC machine driver operations
+ */
+static struct snd_soc_ops mpc8610_hpcd_ops = {
+	.startup = mpc8610_hpcd_startup,
+};
+
+/**
+ * mpc8610_hpcd_probe: platform probe function for the machine driver
+ *
+ * Although this is a machine driver, the SSI node is the "master" node with
+ * respect to audio hardware connections.  Therefore, we create a new ASoC
+ * device for each new SSI node that has a codec attached.
+ */
+static int mpc8610_hpcd_probe(struct platform_device *pdev)
+{
+	struct device *dev = pdev->dev.parent;
+	/* ssi_pdev is the platform device for the SSI node that probed us */
+	struct platform_device *ssi_pdev =
+		container_of(dev, struct platform_device, dev);
+	struct device_node *np = ssi_pdev->dev.of_node;
+	struct device_node *codec_np = NULL;
+	struct mpc8610_hpcd_data *machine_data;
+	int ret = -ENODEV;
+	const char *sprop;
+	const u32 *iprop;
+
+	/* Find the codec node for this SSI. */
+	codec_np = of_parse_phandle(np, "codec-handle", 0);
+	if (!codec_np) {
+		dev_err(dev, "invalid codec node\n");
+		return -EINVAL;
+	}
+
+	machine_data = kzalloc(sizeof(struct mpc8610_hpcd_data), GFP_KERNEL);
+	if (!machine_data) {
+		ret = -ENOMEM;
+		goto error_alloc;
+	}
+
+	machine_data->dai[0].cpu_dai_name = dev_name(&ssi_pdev->dev);
+	machine_data->dai[0].ops = &mpc8610_hpcd_ops;
+
+	/* ASoC core can match codec with device node */
+	machine_data->dai[0].codec_of_node = codec_np;
+
+	/* The DAI name from the codec (snd_soc_dai_driver.name) */
+	machine_data->dai[0].codec_dai_name = "cs4270-hifi";
+
+	/* We register two DAIs per SSI, one for playback and the other for
+	 * capture.  Currently, we only support codecs that have one DAI for
+	 * both playback and capture.
+	 */
+	memcpy(&machine_data->dai[1], &machine_data->dai[0],
+	       sizeof(struct snd_soc_dai_link));
+
+	/* Get the device ID */
+	iprop = of_get_property(np, "cell-index", NULL);
+	if (!iprop) {
+		dev_err(&pdev->dev, "cell-index property not found\n");
+		ret = -EINVAL;
+		goto error;
+	}
+	machine_data->ssi_id = be32_to_cpup(iprop);
+
+	/* Get the serial format and clock direction. */
+	sprop = of_get_property(np, "fsl,mode", NULL);
+	if (!sprop) {
+		dev_err(&pdev->dev, "fsl,mode property not found\n");
+		ret = -EINVAL;
+		goto error;
+	}
+
+	if (strcasecmp(sprop, "i2s-slave") == 0) {
+		machine_data->dai_format =
+			SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBM_CFM;
+		machine_data->codec_clk_direction = SND_SOC_CLOCK_OUT;
+		machine_data->cpu_clk_direction = SND_SOC_CLOCK_IN;
+
+		/* In i2s-slave mode, the codec has its own clock source, so we
+		 * need to get the frequency from the device tree and pass it to
+		 * the codec driver.
+		 */
+		iprop = of_get_property(codec_np, "clock-frequency", NULL);
+		if (!iprop || !*iprop) {
+			dev_err(&pdev->dev, "codec bus-frequency "
+				"property is missing or invalid\n");
+			ret = -EINVAL;
+			goto error;
+		}
+		machine_data->clk_frequency = be32_to_cpup(iprop);
+	} else if (strcasecmp(sprop, "i2s-master") == 0) {
+		machine_data->dai_format =
+			SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_CBS_CFS;
+		machine_data->codec_clk_direction = SND_SOC_CLOCK_IN;
+		machine_data->cpu_clk_direction = SND_SOC_CLOCK_OUT;
+	} else if (strcasecmp(sprop, "lj-slave") == 0) {
+		machine_data->dai_format =
+			SND_SOC_DAIFMT_LEFT_J | SND_SOC_DAIFMT_CBM_CFM;
+		machine_data->codec_clk_direction = SND_SOC_CLOCK_OUT;
+		machine_data->cpu_clk_direction = SND_SOC_CLOCK_IN;
+	} else if (strcasecmp(sprop, "lj-master") == 0) {
+		machine_data->dai_format =
+			SND_SOC_DAIFMT_LEFT_J | SND_SOC_DAIFMT_CBS_CFS;
+		machine_data->codec_clk_direction = SND_SOC_CLOCK_IN;
+		machine_data->cpu_clk_direction = SND_SOC_CLOCK_OUT;
+	} else if (strcasecmp(sprop, "rj-slave") == 0) {
+		machine_data->dai_format =
+			SND_SOC_DAIFMT_RIGHT_J | SND_SOC_DAIFMT_CBM_CFM;
+		machine_data->codec_clk_direction = SND_SOC_CLOCK_OUT;
+		machine_data->cpu_clk_direction = SND_SOC_CLOCK_IN;
+	} else if (strcasecmp(sprop, "rj-master") == 0) {
+		machine_data->dai_format =
+			SND_SOC_DAIFMT_RIGHT_J | SND_SOC_DAIFMT_CBS_CFS;
+		machine_data->codec_clk_direction = SND_SOC_CLOCK_IN;
+		machine_data->cpu_clk_direction = SND_SOC_CLOCK_OUT;
+	} else if (strcasecmp(sprop, "ac97-slave") == 0) {
+		machine_data->dai_format =
+			SND_SOC_DAIFMT_AC97 | SND_SOC_DAIFMT_CBM_CFM;
+		machine_data->codec_clk_direction = SND_SOC_CLOCK_OUT;
+		machine_data->cpu_clk_direction = SND_SOC_CLOCK_IN;
+	} else if (strcasecmp(sprop, "ac97-master") == 0) {
+		machine_data->dai_format =
+			SND_SOC_DAIFMT_AC97 | SND_SOC_DAIFMT_CBS_CFS;
+		machine_data->codec_clk_direction = SND_SOC_CLOCK_IN;
+		machine_data->cpu_clk_direction = SND_SOC_CLOCK_OUT;
+	} else {
+		dev_err(&pdev->dev,
+			"unrecognized fsl,mode property '%s'\n", sprop);
+		ret = -EINVAL;
+		goto error;
+	}
+
+	if (!machine_data->clk_frequency) {
+		dev_err(&pdev->dev, "unknown clock frequency\n");
+		ret = -EINVAL;
+		goto error;
+	}
+
+	/* Find the playback DMA channel to use. */
+	machine_data->dai[0].platform_name = machine_data->platform_name[0];
+	ret = fsl_asoc_get_dma_channel(np, "fsl,playback-dma",
+				       &machine_data->dai[0],
+				       &machine_data->dma_channel_id[0],
+				       &machine_data->dma_id[0]);
+	if (ret) {
+		dev_err(&pdev->dev, "missing/invalid playback DMA phandle\n");
+		goto error;
+	}
+
+	/* Find the capture DMA channel to use. */
+	machine_data->dai[1].platform_name = machine_data->platform_name[1];
+	ret = fsl_asoc_get_dma_channel(np, "fsl,capture-dma",
+				       &machine_data->dai[1],
+				       &machine_data->dma_channel_id[1],
+				       &machine_data->dma_id[1]);
+	if (ret) {
+		dev_err(&pdev->dev, "missing/invalid capture DMA phandle\n");
+		goto error;
+	}
+
+	/* Initialize our DAI data structure.  */
+	machine_data->dai[0].stream_name = "playback";
+	machine_data->dai[1].stream_name = "capture";
+	machine_data->dai[0].name = machine_data->dai[0].stream_name;
+	machine_data->dai[1].name = machine_data->dai[1].stream_name;
+
+	machine_data->card.probe = mpc8610_hpcd_machine_probe;
+	machine_data->card.remove = mpc8610_hpcd_machine_remove;
+	machine_data->card.name = pdev->name; /* The platform driver name */
+	machine_data->card.owner = THIS_MODULE;
+	machine_data->card.dev = &pdev->dev;
+	machine_data->card.num_links = 2;
+	machine_data->card.dai_link = machine_data->dai;
+
+	/* Register with ASoC */
+	ret = snd_soc_register_card(&machine_data->card);
+	if (ret) {
+		dev_err(&pdev->dev, "could not register card\n");
+		goto error;
+	}
+
+	of_node_put(codec_np);
+
+	return 0;
+
+error:
+	kfree(machine_data);
+error_alloc:
+	of_node_put(codec_np);
+	return ret;
+}
+
+/**
+ * mpc8610_hpcd_remove: remove the platform device
+ *
+ * This function is called when the platform device is removed.
+ */
+static int mpc8610_hpcd_remove(struct platform_device *pdev)
+{
+	struct snd_soc_card *card = platform_get_drvdata(pdev);
+	struct mpc8610_hpcd_data *machine_data =
+		container_of(card, struct mpc8610_hpcd_data, card);
+
+	snd_soc_unregister_card(card);
+	kfree(machine_data);
+
+	return 0;
+}
+
+static struct platform_driver mpc8610_hpcd_driver = {
+	.probe = mpc8610_hpcd_probe,
+	.remove = mpc8610_hpcd_remove,
+	.driver = {
+		/* The name must match 'compatible' property in the device tree,
+		 * in lowercase letters.
+		 */
+		.name = "snd-soc-mpc8610hpcd",
+	},
+};
+
+/**
+ * mpc8610_hpcd_init: machine driver initialization.
+ *
+ * This function is called when this module is loaded.
+ */
+static int __init mpc8610_hpcd_init(void)
+{
+	struct device_node *guts_np;
+	struct resource res;
+
+	pr_info("Freescale MPC8610 HPCD ALSA SoC machine driver\n");
+
+	/* Get the physical address of the global utilities registers */
+	guts_np = of_find_compatible_node(NULL, NULL, "fsl,mpc8610-guts");
+	if (of_address_to_resource(guts_np, 0, &res)) {
+		pr_err("mpc8610-hpcd: missing/invalid global utilities node\n");
+		return -EINVAL;
+	}
+	guts_phys = res.start;
+
+	return platform_driver_register(&mpc8610_hpcd_driver);
+}
+
+/**
+ * mpc8610_hpcd_exit: machine driver exit
+ *
+ * This function is called when this driver is unloaded.
+ */
+static void __exit mpc8610_hpcd_exit(void)
+{
+	platform_driver_unregister(&mpc8610_hpcd_driver);
+}
+
+module_init(mpc8610_hpcd_init);
+module_exit(mpc8610_hpcd_exit);
+
+MODULE_AUTHOR("Timur Tabi <timur@freescale.com>");
+MODULE_DESCRIPTION("Freescale MPC8610 HPCD ALSA SoC machine driver");
+MODULE_LICENSE("GPL v2");