1 files changed, 312 insertions, 0 deletions

diff --git a/sound/soc/tegra/tegra_vcm.c b/sound/soc/tegra/tegra_vcm.c
new file mode 100644
index 000000000000..afb444e3f19f
--- /dev/null
+++ b/sound/soc/tegra/tegra_vcm.c
@@ -0,0 +1,312 @@
+/*
+ * tegra_vcm.c - Tegra machine ASoC driver for P852/P1852/P1853 Boards.
+ *
+ * Author: Nitin Pai <npai@nvidia.com>
+ * Copyright (C) 2010-2012 - NVIDIA, Corporation. All rights reserved.
+ *
+ * Based on code copyright/by:
+ * Copyright (c) 2009-2010, NVIDIA Corporation.
+ * Stephen Warren <swarren@nvidia.com>
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that 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, write to the Free Software
+ * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
+ * 02110-1301 USA
+ *
+ */
+
+#include <asm/mach-types.h>
+
+#include <linux/clk.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#include <mach/tegra_p1852_pdata.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+
+#include "tegra_pcm.h"
+#include "tegra_asoc_utils.h"
+
+#ifdef CONFIG_MACH_P1852
+#define DRV_NAME "tegra-snd-p1852"
+#endif
+#ifdef CONFIG_MACH_E1853
+#define DRV_NAME "tegra-snd-e1853"
+#endif
+#ifdef CONFIG_MACH_P852
+#define DRV_NAME "tegra-snd-p852"
+#endif
+
+
+struct tegra_vcm {
+	struct tegra_asoc_utils_data util_data;
+	struct tegra_p1852_platform_data *pdata;
+};
+
+static int tegra_vcm_hw_params(struct snd_pcm_substream *substream,
+					struct snd_pcm_hw_params *params,
+					int codec_id)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct snd_soc_dai *codec_dai = rtd->codec_dai;
+	struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
+	struct snd_soc_codec *codec = rtd->codec;
+	struct snd_soc_card *card = codec->card;
+	struct tegra_vcm *machine = snd_soc_card_get_drvdata(card);
+	int srate, mclk;
+	int i2s_daifmt = 0;
+	int err;
+	struct tegra_p1852_platform_data *pdata;
+
+	pdata = machine->pdata;
+
+	srate = params_rate(params);
+	switch (srate) {
+	case 64000:
+	case 88200:
+	case 96000:
+		mclk = 128 * srate;
+		break;
+	default:
+		mclk = 256 * srate;
+		break;
+	}
+
+	err = tegra_asoc_utils_set_rate(&machine->util_data, srate, mclk);
+	if (err < 0) {
+		if (!(machine->util_data.set_mclk % mclk))
+			mclk = machine->util_data.set_mclk;
+		else {
+			dev_err(card->dev, "Can't configure clocks\n");
+			return err;
+		}
+	}
+
+	tegra_asoc_utils_lock_clk_rate(&machine->util_data, 1);
+
+	if (pdata->codec_info[codec_id].master)
+		i2s_daifmt |= SND_SOC_DAIFMT_CBM_CFM;
+	else
+		i2s_daifmt |= SND_SOC_DAIFMT_CBS_CFS;
+
+	switch (pdata->codec_info[codec_id].i2s_format) {
+	case format_tdm:
+		i2s_daifmt |= SND_SOC_DAIFMT_DSP_A;
+		break;
+	case format_i2s:
+		i2s_daifmt |= SND_SOC_DAIFMT_I2S;
+		break;
+	case format_rjm:
+		i2s_daifmt |= SND_SOC_DAIFMT_RIGHT_J;
+		break;
+	case format_ljm:
+		i2s_daifmt |= SND_SOC_DAIFMT_LEFT_J;
+		break;
+	default:
+		break;
+	}
+
+	err = snd_soc_dai_set_fmt(codec_dai, i2s_daifmt);
+	if (err < 0)
+		dev_info(card->dev, "codec_dai fmt not set\n");
+
+	err = snd_soc_dai_set_fmt(cpu_dai, i2s_daifmt);
+	if (err < 0) {
+		dev_err(card->dev, "cpu_dai fmt not set\n");
+		return err;
+	}
+	err = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
+					SND_SOC_CLOCK_IN);
+	if (err < 0)
+		dev_info(card->dev, "codec_dai clock not set\n");
+
+	if (pdata->codec_info[codec_id].i2s_format ==
+			format_tdm) {
+		err = snd_soc_dai_set_tdm_slot(cpu_dai,
+					pdata->codec_info[codec_id].rx_mask,
+					pdata->codec_info[codec_id].tx_mask,
+					pdata->codec_info[codec_id].num_slots,
+					pdata->codec_info[codec_id].slot_width);
+		if (err < 0)
+			dev_err(card->dev, "cpu_dai tdm mode setting not done\n");
+	}
+
+	return 0;
+}
+
+static int tegra_vcm_hw_params_controller1(
+				struct snd_pcm_substream *substream,
+				struct snd_pcm_hw_params *params)
+{
+	return tegra_vcm_hw_params(substream, params, 0);
+}
+
+static int tegra_vcm_hw_params_controller2(
+				struct snd_pcm_substream *substream,
+				struct snd_pcm_hw_params *params)
+{
+	return tegra_vcm_hw_params(substream, params, 1);
+}
+
+static int tegra_hw_free(struct snd_pcm_substream *substream)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct tegra_vcm *machine = snd_soc_card_get_drvdata(rtd->card);
+
+	tegra_asoc_utils_lock_clk_rate(&machine->util_data, 0);
+
+	return 0;
+}
+
+static struct snd_soc_ops tegra_vcm_ops_controller1 = {
+	.hw_params = tegra_vcm_hw_params_controller1,
+	.hw_free = tegra_hw_free,
+};
+static struct snd_soc_ops tegra_vcm_ops_controller2 = {
+	.hw_params = tegra_vcm_hw_params_controller2,
+	.hw_free = tegra_hw_free,
+};
+
+static struct snd_soc_dai_link tegra_vcm_dai_link[] = {
+	{
+		.name = "I2S-TDM-1",
+		.stream_name = "TEGRA PCM",
+		.platform_name = "tegra-pcm-audio",
+		.ops = &tegra_vcm_ops_controller1,
+	},
+	{
+		.name = "I2S-TDM-2",
+		.stream_name = "TEGRA PCM",
+		.platform_name = "tegra-pcm-audio",
+		.ops = &tegra_vcm_ops_controller2,
+	}
+};
+
+static struct snd_soc_card snd_soc_tegra_vcm = {
+	.name = "tegra-vcm",
+	.dai_link = tegra_vcm_dai_link,
+	.num_links = ARRAY_SIZE(tegra_vcm_dai_link),
+};
+
+static __devinit int tegra_vcm_driver_probe(struct platform_device *pdev)
+{
+	struct snd_soc_card *card = &snd_soc_tegra_vcm;
+	struct tegra_vcm *machine;
+	struct tegra_p1852_platform_data *pdata;
+	int ret;
+	int i;
+
+	pdata = pdev->dev.platform_data;
+	if (!pdata) {
+		dev_err(&pdev->dev, "No platform data supplied\n");
+		return -EINVAL;
+	}
+
+	machine = kzalloc(sizeof(struct tegra_vcm), GFP_KERNEL);
+	if (!machine) {
+		dev_err(&pdev->dev, "Can't allocate tegra_vcm struct\n");
+		return -ENOMEM;
+	}
+
+	machine->pdata = pdata;
+
+	/* The codec driver and codec dai have to come from the system
+	 * level board configuration file
+	 * */
+	for (i = 0; i < ARRAY_SIZE(tegra_vcm_dai_link); i++) {
+		tegra_vcm_dai_link[i].codec_name =
+				pdata->codec_info[i].codec_name;
+		tegra_vcm_dai_link[i].cpu_dai_name =
+				pdata->codec_info[i].cpu_dai_name;
+		tegra_vcm_dai_link[i].codec_dai_name =
+				pdata->codec_info[i].codec_dai_name;
+		tegra_vcm_dai_link[i].name =
+				pdata->codec_info[i].name;
+		if (pdata->codec_info[i].pcm_driver)
+			tegra_vcm_dai_link[i].platform_name =
+				pdata->codec_info[i].pcm_driver;
+	}
+
+	ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev, card);
+	if (ret)
+		goto err_free_machine;
+
+	card->dev = &pdev->dev;
+	platform_set_drvdata(pdev, card);
+	snd_soc_card_set_drvdata(card, machine);
+
+	ret = snd_soc_register_card(card);
+	if (ret) {
+		dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
+			ret);
+	}
+
+	if (!card->instantiated) {
+		ret = -ENODEV;
+		dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
+			ret);
+		goto err_unregister_card;
+	}
+
+	return 0;
+
+err_unregister_card:
+	snd_soc_unregister_card(card);
+	tegra_asoc_utils_fini(&machine->util_data);
+err_free_machine:
+	kfree(machine);
+	return ret;
+}
+
+static int __devexit tegra_vcm_driver_remove(struct platform_device *pdev)
+{
+	struct snd_soc_card *card = platform_get_drvdata(pdev);
+	struct tegra_vcm *machine = snd_soc_card_get_drvdata(card);
+
+	snd_soc_unregister_card(card);
+	tegra_asoc_utils_fini(&machine->util_data);
+	kfree(machine);
+
+	return 0;
+}
+
+static struct platform_driver tegra_vcm_driver = {
+	.driver = {
+		.name = DRV_NAME,
+		.owner = THIS_MODULE,
+		.pm = &snd_soc_pm_ops,
+	},
+	.probe = tegra_vcm_driver_probe,
+	.remove = __devexit_p(tegra_vcm_driver_remove),
+};
+
+static int __init tegra_vcm_modinit(void)
+{
+	return platform_driver_register(&tegra_vcm_driver);
+}
+module_init(tegra_vcm_modinit);
+
+static void __exit tegra_vcm_modexit(void)
+{
+	platform_driver_unregister(&tegra_vcm_driver);
+}
+module_exit(tegra_vcm_modexit);
+
+MODULE_AUTHOR("Nitin Pai <npai@nvidia.com>");
+MODULE_DESCRIPTION("Tegra+VCM machine ASoC driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:" DRV_NAME);