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>

Documentation/devicetree/bindings/sound/tegra-audio-wm8753.txt

+NVIDIA Tegra audio complex
+
+Required properties:
+- compatible : "nvidia,tegra-audio-wm8753"
+- nvidia,model : The user-visible name of this sound complex.
+- nvidia,audio-routing : A list of the connections between audio components.
+  Each entry is a pair of strings, the first being the connection's sink,
+  the second being the connection's source. Valid names for sources and
+  sinks are the WM8753's pins, and the jacks on the board:
+
+  WM8753 pins:
+
+  * LOUT1
+  * LOUT2
+  * ROUT1
+  * ROUT2
+  * MONO1
+  * MONO2
+  * OUT3
+  * OUT4
+  * LINE1
+  * LINE2
+  * RXP
+  * RXN
+  * ACIN
+  * ACOP
+  * MIC1N
+  * MIC1
+  * MIC2N
+  * MIC2
+  * Mic Bias
+
+  Board connectors:
+
+  * Headphone Jack
+  * Mic Jack
+
+- nvidia,i2s-controller : The phandle of the Tegra I2S1 controller
+- nvidia,audio-codec : The phandle of the WM8753 audio codec
+Example:
+
+sound {
+	compatible = "nvidia,tegra-audio-wm8753-whistler",
+		     "nvidia,tegra-audio-wm8753"
+	nvidia,model = "tegra-wm8753-harmony";
+
+	nvidia,audio-routing =
+		"Headphone Jack", "LOUT1",
+		"Headphone Jack", "ROUT1";
+
+	nvidia,i2s-controller = <&i2s1>;
+	nvidia,audio-codec = <&wm8753>;
+};
+

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

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

sound/soc/tegra/tegra_wm8753.c

+/*
+ * 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);