From d2e198ed9ade74e2cb042ade405071ab58b11e33 Mon Sep 17 00:00:00 2001
From: Lars-Peter Clausen <lars@metafoo.de>
Date: Sat, 24 Apr 2010 12:38:41 +0200
Subject: [PATCH] Add N526 sound SoC board driver

---
 sound/soc/jz4740/Kconfig  |    8 ++
 sound/soc/jz4740/Makefile |    2 +
 sound/soc/jz4740/n526.c   |  169 +++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 179 insertions(+), 0 deletions(-)
 create mode 100644 sound/soc/jz4740/n526.c

--- a/sound/soc/jz4740/Kconfig
+++ b/sound/soc/jz4740/Kconfig
@@ -29,3 +29,11 @@ config SND_JZ4740_SOC_N516
     select SND_SOC_JZCODEC
 	help
 	  Say Y if you want to enable support for SoC audio on the Hanvon N516.
+
+config SND_JZ4740_SOC_N526
+	tristate "SoC Audio support for Hanvon N526 eBook reader"
+	depends on SND_JZ4740_SOC && JZ4740_N526
+	select SND_JZ4740_SOC_I2S
+    select SND_SOC_JZCODEC
+	help
+	  Say Y if you want to enable support for SoC audio on the Hanvon N526.
--- a/sound/soc/jz4740/Makefile
+++ b/sound/soc/jz4740/Makefile
@@ -10,6 +10,8 @@ obj-$(CONFIG_SND_JZ4740_SOC_I2S) += snd-
 # Jz4740 Machine Support
 snd-soc-qi-lb60-objs := qi_lb60.o
 snd-soc-n516-objs := n516.o
+snd-soc-n526-objs := n526.o
 
 obj-$(CONFIG_SND_JZ4740_SOC_QI_LB60) += snd-soc-qi-lb60.o
 obj-$(CONFIG_SND_JZ4740_SOC_N516) += snd-soc-n516.o
+obj-$(CONFIG_SND_JZ4740_SOC_N526) += snd-soc-n526.o
--- /dev/null
+++ b/sound/soc/jz4740/n526.c
@@ -0,0 +1,169 @@
+/*
+ * Copyright (C) 2009, Lars-Peter Clausen <lars@metafoo.de>
+ *
+ * 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.
+ *
+ *  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.,
+ *  675 Mass Ave, Cambridge, MA 02139, USA.
+ *
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/soc.h>
+#include <sound/soc-dapm.h>
+#include <linux/gpio.h>
+
+#include "../codecs/jzcodec.h"
+#include "jz4740-pcm.h"
+#include "jz4740-i2s.h"
+
+#define N526_AMP_EN_GPIO JZ_GPIO_PORTD(4)
+
+static int n526_spk_event(struct snd_soc_dapm_widget *widget,
+			     struct snd_kcontrol *ctrl, int event)
+{
+	gpio_set_value(N526_AMP_EN_GPIO, !SND_SOC_DAPM_EVENT_OFF(event));
+	return 0;
+}
+
+static const struct snd_soc_dapm_widget n526_widgets[] = {
+	SND_SOC_DAPM_SPK("Speaker", n526_spk_event),
+	SND_SOC_DAPM_HP("Headphone", NULL),
+	SND_SOC_DAPM_MIC("Mic", NULL),
+};
+
+static const struct snd_soc_dapm_route n526_routes[] = {
+	{"Mic", NULL, "MIC"},
+	{"Speaker", NULL, "LOUT"},
+	{"Speaker", NULL, "ROUT"},
+	{"Headphone", NULL, "LOUT"},
+	{"Headphone", NULL, "ROUT"},
+};
+
+static const struct snd_kcontrol_new n526_controls[] = {
+	SOC_DAPM_PIN_SWITCH("Speaker"),
+};
+
+#define N526_DAIFMT (SND_SOC_DAIFMT_I2S | \
+			SND_SOC_DAIFMT_NB_NF | \
+			SND_SOC_DAIFMT_CBM_CFM)
+
+static int n526_codec_init(struct snd_soc_codec *codec)
+{
+	int ret;
+	struct snd_soc_dai *cpu_dai = codec->socdev->card->dai_link->cpu_dai;
+	struct snd_soc_dai *codec_dai = codec->socdev->card->dai_link->codec_dai;
+
+	snd_soc_dapm_nc_pin(codec, "LIN");
+	snd_soc_dapm_nc_pin(codec, "RIN");
+
+	ret = snd_soc_dai_set_fmt(codec_dai, N526_DAIFMT);
+	if (ret < 0) {
+		dev_err(codec->dev, "Failed to set codec dai format: %d\n", ret);
+		return ret;
+	}
+
+	ret = snd_soc_dai_set_fmt(cpu_dai, N526_DAIFMT);
+	if (ret < 0) {
+		dev_err(codec->dev, "Failed to set cpu dai format: %d\n", ret);
+		return ret;
+	}
+
+	ret = snd_soc_dai_set_sysclk(codec_dai, JZCODEC_SYSCLK, 111,
+		SND_SOC_CLOCK_IN);
+	if (ret < 0) {
+		dev_err(codec->dev, "Failed to set codec dai sysclk: %d\n", ret);
+		return ret;
+	}
+
+	snd_soc_dapm_new_controls(codec, n526_widgets, ARRAY_SIZE(n526_widgets));
+
+	snd_soc_add_controls(codec, n526_controls,
+				ARRAY_SIZE(n526_controls));
+
+	snd_soc_dapm_add_routes(codec, n526_routes, ARRAY_SIZE(n526_routes));
+
+	snd_soc_dapm_sync(codec);
+
+	return 0;
+}
+
+static struct snd_soc_dai_link n526_dai = {
+	.name = "jz-codec",
+	.stream_name = "JZCODEC",
+	.cpu_dai = &jz4740_i2s_dai,
+	.codec_dai = &jz_codec_dai,
+	.init = n526_codec_init,
+};
+
+static struct snd_soc_card n526 = {
+	.name = "N526",
+	.dai_link = &n526_dai,
+	.num_links = 1,
+	.platform = &jz4740_soc_platform,
+};
+
+static struct snd_soc_device n526_snd_devdata = {
+	.card = &n526,
+	.codec_dev = &soc_codec_dev_jzcodec,
+};
+
+static struct platform_device *n526_snd_device;
+
+static int __init n526_init(void)
+{
+	int ret;
+
+	n526_snd_device = platform_device_alloc("soc-audio", -1);
+
+	if (!n526_snd_device)
+		return -ENOMEM;
+
+	ret = gpio_request(N526_AMP_EN_GPIO, "AMP");
+	if (ret) {
+		pr_err("n526 snd: Failed to request AMP GPIO(%d): %d\n",
+				N526_AMP_EN_GPIO, ret);
+		goto err_device_put;
+	}
+
+	gpio_direction_output(JZ_GPIO_PORTD(4), 0);
+
+	platform_set_drvdata(n526_snd_device, &n526_snd_devdata);
+	n526_snd_devdata.dev = &n526_snd_device->dev;
+	ret = platform_device_add(n526_snd_device);
+	if (ret) {
+		pr_err("n526 snd: Failed to add snd soc device: %d\n", ret);
+		goto err_unset_pdata;
+	}
+
+	 return 0;
+
+err_unset_pdata:
+	platform_set_drvdata(n526_snd_device, NULL);
+	gpio_free(N526_AMP_EN_GPIO);
+err_device_put:
+	platform_device_put(n526_snd_device);
+
+	return ret;
+}
+module_init(n526_init);
+
+static void __exit n526_exit(void)
+{
+	gpio_free(N526_AMP_EN_GPIO);
+	platform_device_unregister(n526_snd_device);
+}
+module_exit(n526_exit);
+
+MODULE_AUTHOR("Lars-Peter Clausen <lars@metafoo.de>");
+MODULE_DESCRIPTION("ALSA SoC N526 audio support");
+MODULE_LICENSE("GPL v2");