1 files changed, 272 insertions, 0 deletions

diff --git a/sound/soc/tegra/tegra_p1852.c b/sound/soc/tegra/tegra_p1852.c
new file mode 100644
index 00000000000..27a1ea59034
--- /dev/null
+++ b/sound/soc/tegra/tegra_p1852.c
@@ -0,0 +1,272 @@
+/*
+ * tegra_p1852.c - Tegra machine ASoC driver for P1852 Boards.
+ *
+ * Author: Nitin Pai <npai@nvidia.com>
+ * Copyright (C) 2010-2012 - NVIDIA, Inc.
+ *
+ * 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"
+
+#define DRV_NAME "tegra-snd-p1852"
+
+struct tegra_p1852 {
+        struct tegra_asoc_utils_data util_data;
+        struct tegra_p1852_platform_data *pdata;
+};
+
+static int tegra_p1852_hw_params(struct snd_pcm_substream *substream,
+                                        struct snd_pcm_hw_params *params)
+{
+        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_p1852 *machine = snd_soc_card_get_drvdata(card);
+        int srate, mclk;
+        int i2s_daifmt = 0;
+        int err;
+        struct tegra_p1852_platform_data *pdata;
+        int codec_id = codec_dai->id;
+
+        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");
+
+        return 0;
+}
+
+static int tegra_hw_free(struct snd_pcm_substream *substream)
+{
+        struct snd_soc_pcm_runtime *rtd = substream->private_data;
+        struct tegra_p1852 *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_p1852_ops = {
+        .hw_params = tegra_p1852_hw_params,
+        .hw_free = tegra_hw_free,
+};
+
+static struct snd_soc_dai_link tegra_p1852_dai_link[] = {
+        {
+                .name = "I2S-TDM-1",
+                .stream_name = "TEGRA PCM",
+                .platform_name = "tegra-pcm-audio",
+                .ops = &tegra_p1852_ops,
+        },
+        {
+                .name = "I2S-TDM-2",
+                .stream_name = "TEGRA PCM",
+                .platform_name = "tegra-pcm-audio",
+                .ops = &tegra_p1852_ops,
+        }
+};
+
+static struct snd_soc_card snd_soc_tegra_p1852 = {
+        .name = "tegra-p1852",
+        .dai_link = tegra_p1852_dai_link,
+        .num_links = ARRAY_SIZE(tegra_p1852_dai_link),
+};
+
+static __devinit int tegra_p1852_driver_probe(struct platform_device *pdev)
+{
+        struct snd_soc_card *card = &snd_soc_tegra_p1852;
+        struct tegra_p1852 *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_p1852), GFP_KERNEL);
+        if (!machine) {
+                dev_err(&pdev->dev, "Can't allocate tegra_p1852 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_p1852_dai_link); i++) {
+                tegra_p1852_dai_link[i].codec_name =
+                                pdata->codec_info[i].codec_name;
+                tegra_p1852_dai_link[i].cpu_dai_name =
+                                pdata->codec_info[i].cpu_dai_name;
+                tegra_p1852_dai_link[i].codec_dai_name =
+                                pdata->codec_info[i].codec_dai_name;
+                tegra_p1852_dai_link[i].name =
+                                pdata->codec_info[i].name;
+        }
+
+        ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
+        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_p1852_driver_remove(struct platform_device *pdev)
+{
+        struct snd_soc_card *card = platform_get_drvdata(pdev);
+        struct tegra_p1852 *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_p1852_driver = {
+        .driver = {
+                .name = DRV_NAME,
+                .owner = THIS_MODULE,
+                .pm = &snd_soc_pm_ops,
+        },
+        .probe = tegra_p1852_driver_probe,
+        .remove = __devexit_p(tegra_p1852_driver_remove),
+};
+
+static int __init tegra_p1852_modinit(void)
+{
+        return platform_driver_register(&tegra_p1852_driver);
+}
+module_init(tegra_p1852_modinit);
+
+static void __exit tegra_p1852_modexit(void)
+{
+        platform_driver_unregister(&tegra_p1852_driver);
+}
+module_exit(tegra_p1852_modexit);
+
+MODULE_AUTHOR("Nitin Pai <npai@nvidia.com>");
+MODULE_DESCRIPTION("Tegra+P1852 machine ASoC driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:" DRV_NAME);