ASoC: tegra: Add machine driver for WM8753 codec

One such machine is Whistler.

Signed-off-by: Stephen Warren <swarren@nvidia.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>

3 files changed, 236 insertions, 0 deletions

diff --git a/sound/soc/tegra/Kconfig b/sound/soc/tegra/Kconfig
index 5331c61faf0..c1c8e955f4d 100644
--- a/sound/soc/tegra/Kconfig
+++ b/sound/soc/tegra/Kconfig
@@ -48,6 +48,16 @@ config SND_SOC_TEGRA30_I2S
           Tegra30 I2S interface. You will also need to select the individual
           machine drivers to support below.
 
+config SND_SOC_TEGRA_WM8753
+        tristate "SoC Audio support for Tegra boards using a WM8753 codec"
+        depends on SND_SOC_TEGRA && I2C
+        select SND_SOC_TEGRA20_I2S if ARCH_TEGRA_2x_SOC
+        select SND_SOC_TEGRA30_I2S if ARCH_TEGRA_3x_SOC
+        select SND_SOC_WM8753
+        help
+          Say Y or M here if you want to add support for SoC audio on Tegra
+          boards using the WM8753 codec, such as Whistler.
+
 config MACH_HAS_SND_SOC_TEGRA_WM8903
         bool
         help
diff --git a/sound/soc/tegra/Makefile b/sound/soc/tegra/Makefile
index 98704b48b62..391e78a34c0 100644
--- a/sound/soc/tegra/Makefile
+++ b/sound/soc/tegra/Makefile
@@ -16,10 +16,12 @@ obj-$(CONFIG_SND_SOC_TEGRA30_AHUB) += snd-soc-tegra30-ahub.o
 obj-$(CONFIG_SND_SOC_TEGRA30_I2S) += snd-soc-tegra30-i2s.o
 
 # Tegra machine Support
+snd-soc-tegra-wm8753-objs := tegra_wm8753.o
 snd-soc-tegra-wm8903-objs := tegra_wm8903.o
 snd-soc-tegra-trimslice-objs := trimslice.o
 snd-soc-tegra-alc5632-objs := tegra_alc5632.o
 
+obj-$(CONFIG_SND_SOC_TEGRA_WM8753) += snd-soc-tegra-wm8753.o
 obj-$(CONFIG_SND_SOC_TEGRA_WM8903) += snd-soc-tegra-wm8903.o
 obj-$(CONFIG_SND_SOC_TEGRA_TRIMSLICE) += snd-soc-tegra-trimslice.o
 obj-$(CONFIG_SND_SOC_TEGRA_ALC5632) += snd-soc-tegra-alc5632.o
diff --git a/sound/soc/tegra/tegra_wm8753.c b/sound/soc/tegra/tegra_wm8753.c
new file mode 100644
index 00000000000..4e77026807a
--- /dev/null
+++ b/sound/soc/tegra/tegra_wm8753.c
@@ -0,0 +1,224 @@
+/*
+ * tegra_wm8753.c - Tegra machine ASoC driver for boards using WM8753 codec.
+ *
+ * Author: Stephen Warren <swarren@nvidia.com>
+ * Copyright (C) 2010-2012 - NVIDIA, Inc.
+ *
+ * Based on code copyright/by:
+ *
+ * (c) 2009, 2010 Nvidia Graphics Pvt. Ltd.
+ *
+ * Copyright 2007 Wolfson Microelectronics PLC.
+ * Author: Graeme Gregory
+ *         graeme.gregory@wolfsonmicro.com or linux@wolfsonmicro.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/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/gpio.h>
+#include <linux/of_gpio.h>
+
+#include <sound/core.h>
+#include <sound/jack.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+
+#include "../codecs/wm8753.h"
+
+#include "tegra_asoc_utils.h"
+
+#define DRV_NAME "tegra-snd-wm8753"
+
+struct tegra_wm8753 {
+        struct tegra_asoc_utils_data util_data;
+};
+
+static int tegra_wm8753_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_codec *codec = rtd->codec;
+        struct snd_soc_card *card = codec->card;
+        struct tegra_wm8753 *machine = snd_soc_card_get_drvdata(card);
+        int srate, mclk;
+        int err;
+
+        srate = params_rate(params);
+        switch (srate) {
+        case 11025:
+        case 22050:
+        case 44100:
+        case 88200:
+                mclk = 11289600;
+                break;
+        default:
+                mclk = 12288000;
+                break;
+        }
+
+        err = tegra_asoc_utils_set_rate(&machine->util_data, srate, mclk);
+        if (err < 0) {
+                dev_err(card->dev, "Can't configure clocks\n");
+                return err;
+        }
+
+        err = snd_soc_dai_set_sysclk(codec_dai, WM8753_MCLK, mclk,
+                                        SND_SOC_CLOCK_IN);
+        if (err < 0) {
+                dev_err(card->dev, "codec_dai clock not set\n");
+                return err;
+        }
+
+        return 0;
+}
+
+static struct snd_soc_ops tegra_wm8753_ops = {
+        .hw_params = tegra_wm8753_hw_params,
+};
+
+static const struct snd_soc_dapm_widget tegra_wm8753_dapm_widgets[] = {
+        SND_SOC_DAPM_HP("Headphone Jack", NULL),
+        SND_SOC_DAPM_MIC("Mic Jack", NULL),
+};
+
+static struct snd_soc_dai_link tegra_wm8753_dai = {
+        .name = "WM8753",
+        .stream_name = "WM8753 PCM",
+        .codec_dai_name = "wm8753-hifi",
+        .ops = &tegra_wm8753_ops,
+        .dai_fmt = SND_SOC_DAIFMT_I2S |
+                        SND_SOC_DAIFMT_NB_NF |
+                        SND_SOC_DAIFMT_CBS_CFS,
+};
+
+static struct snd_soc_card snd_soc_tegra_wm8753 = {
+        .name = "tegra-wm8753",
+        .owner = THIS_MODULE,
+        .dai_link = &tegra_wm8753_dai,
+        .num_links = 1,
+
+        .dapm_widgets = tegra_wm8753_dapm_widgets,
+        .num_dapm_widgets = ARRAY_SIZE(tegra_wm8753_dapm_widgets),
+        .fully_routed = true,
+};
+
+static __devinit int tegra_wm8753_driver_probe(struct platform_device *pdev)
+{
+        struct snd_soc_card *card = &snd_soc_tegra_wm8753;
+        struct tegra_wm8753 *machine;
+        int ret;
+
+        machine = devm_kzalloc(&pdev->dev, sizeof(struct tegra_wm8753),
+                               GFP_KERNEL);
+        if (!machine) {
+                dev_err(&pdev->dev, "Can't allocate tegra_wm8753 struct\n");
+                ret = -ENOMEM;
+                goto err;
+        }
+
+        card->dev = &pdev->dev;
+        platform_set_drvdata(pdev, card);
+        snd_soc_card_set_drvdata(card, machine);
+
+        ret = snd_soc_of_parse_card_name(card, "nvidia,model");
+        if (ret)
+                goto err;
+
+        ret = snd_soc_of_parse_audio_routing(card, "nvidia,audio-routing");
+        if (ret)
+                goto err;
+
+        tegra_wm8753_dai.codec_of_node = of_parse_phandle(
+                        pdev->dev.of_node, "nvidia,audio-codec", 0);
+        if (!tegra_wm8753_dai.codec_of_node) {
+                dev_err(&pdev->dev,
+                        "Property 'nvidia,audio-codec' missing or invalid\n");
+                ret = -EINVAL;
+                goto err;
+        }
+
+        tegra_wm8753_dai.cpu_dai_of_node = of_parse_phandle(
+                        pdev->dev.of_node, "nvidia,i2s-controller", 0);
+        if (!tegra_wm8753_dai.cpu_dai_of_node) {
+                dev_err(&pdev->dev,
+                        "Property 'nvidia,i2s-controller' missing or invalid\n");
+                ret = -EINVAL;
+                goto err;
+        }
+
+        tegra_wm8753_dai.platform_of_node =
+                                tegra_wm8753_dai.cpu_dai_of_node;
+
+        ret = tegra_asoc_utils_init(&machine->util_data, &pdev->dev);
+        if (ret)
+                goto err;
+
+        ret = snd_soc_register_card(card);
+        if (ret) {
+                dev_err(&pdev->dev, "snd_soc_register_card failed (%d)\n",
+                        ret);
+                goto err_fini_utils;
+        }
+
+        return 0;
+
+err_fini_utils:
+        tegra_asoc_utils_fini(&machine->util_data);
+err:
+        return ret;
+}
+
+static int __devexit tegra_wm8753_driver_remove(struct platform_device *pdev)
+{
+        struct snd_soc_card *card = platform_get_drvdata(pdev);
+        struct tegra_wm8753 *machine = snd_soc_card_get_drvdata(card);
+
+        snd_soc_unregister_card(card);
+
+        tegra_asoc_utils_fini(&machine->util_data);
+
+        return 0;
+}
+
+static const struct of_device_id tegra_wm8753_of_match[] __devinitconst = {
+        { .compatible = "nvidia,tegra-audio-wm8753", },
+        {},
+};
+
+static struct platform_driver tegra_wm8753_driver = {
+        .driver = {
+                .name = DRV_NAME,
+                .owner = THIS_MODULE,
+                .pm = &snd_soc_pm_ops,
+                .of_match_table = tegra_wm8753_of_match,
+        },
+        .probe = tegra_wm8753_driver_probe,
+        .remove = __devexit_p(tegra_wm8753_driver_remove),
+};
+module_platform_driver(tegra_wm8753_driver);
+
+MODULE_AUTHOR("Stephen Warren <swarren@nvidia.com>");
+MODULE_DESCRIPTION("Tegra+WM8753 machine ASoC driver");
+MODULE_LICENSE("GPL");
+MODULE_ALIAS("platform:" DRV_NAME);
+MODULE_DEVICE_TABLE(of, tegra_wm8753_of_match);