init android origin source code

1 files changed, 280 insertions, 0 deletions

diff --git a/ANDROID_3.4.5/sound/soc/atmel/sam9g20_wm8731.c b/ANDROID_3.4.5/sound/soc/atmel/sam9g20_wm8731.c
new file mode 100644
index 00000000..c8835148
--- /dev/null
+++ b/ANDROID_3.4.5/sound/soc/atmel/sam9g20_wm8731.c
@@ -0,0 +1,280 @@
+/*
+ * sam9g20_wm8731  --  SoC audio for AT91SAM9G20-based
+ * 			ATMEL AT91SAM9G20ek board.
+ *
+ *  Copyright (C) 2005 SAN People
+ *  Copyright (C) 2008 Atmel
+ *
+ * Authors: Sedji Gaouaou <sedji.gaouaou@atmel.com>
+ *
+ * Based on ati_b1_wm8731.c by:
+ * Frank Mandarino <fmandarino@endrelia.com>
+ * Copyright 2006 Endrelia Technologies Inc.
+ * Based on corgi.c by:
+ * Copyright 2005 Wolfson Microelectronics PLC.
+ * Copyright 2005 Openedhand Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/kernel.h>
+#include <linux/clk.h>
+#include <linux/timer.h>
+#include <linux/interrupt.h>
+#include <linux/platform_device.h>
+#include <linux/i2c.h>
+
+#include <linux/atmel-ssc.h>
+
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+
+#include <asm/mach-types.h>
+#include <mach/hardware.h>
+#include <mach/gpio.h>
+
+#include "../codecs/wm8731.h"
+#include "atmel-pcm.h"
+#include "atmel_ssc_dai.h"
+
+#define MCLK_RATE 12000000
+
+/*
+ * As shipped the board does not have inputs.  However, it is relatively
+ * straightforward to modify the board to hook them up so support is left
+ * in the driver.
+ */
+#undef ENABLE_MIC_INPUT
+
+static struct clk *mclk;
+
+static int at91sam9g20ek_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;
+	int ret;
+
+	/* set codec DAI configuration */
+	ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
+		SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
+	if (ret < 0)
+		return ret;
+
+	/* set cpu DAI configuration */
+	ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
+		SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static struct snd_soc_ops at91sam9g20ek_ops = {
+	.hw_params = at91sam9g20ek_hw_params,
+};
+
+static int at91sam9g20ek_set_bias_level(struct snd_soc_card *card,
+					struct snd_soc_dapm_context *dapm,
+					enum snd_soc_bias_level level)
+{
+	static int mclk_on;
+	int ret = 0;
+
+	switch (level) {
+	case SND_SOC_BIAS_ON:
+	case SND_SOC_BIAS_PREPARE:
+		if (!mclk_on)
+			ret = clk_enable(mclk);
+		if (ret == 0)
+			mclk_on = 1;
+		break;
+
+	case SND_SOC_BIAS_OFF:
+	case SND_SOC_BIAS_STANDBY:
+		if (mclk_on)
+			clk_disable(mclk);
+		mclk_on = 0;
+		break;
+	}
+
+	return ret;
+}
+
+static const struct snd_soc_dapm_widget at91sam9g20ek_dapm_widgets[] = {
+	SND_SOC_DAPM_MIC("Int Mic", NULL),
+	SND_SOC_DAPM_SPK("Ext Spk", NULL),
+};
+
+static const struct snd_soc_dapm_route intercon[] = {
+
+	/* speaker connected to LHPOUT */
+	{"Ext Spk", NULL, "LHPOUT"},
+
+	/* mic is connected to Mic Jack, with WM8731 Mic Bias */
+	{"MICIN", NULL, "Mic Bias"},
+	{"Mic Bias", NULL, "Int Mic"},
+};
+
+/*
+ * Logic for a wm8731 as connected on a at91sam9g20ek board.
+ */
+static int at91sam9g20ek_wm8731_init(struct snd_soc_pcm_runtime *rtd)
+{
+	struct snd_soc_codec *codec = rtd->codec;
+	struct snd_soc_dai *codec_dai = rtd->codec_dai;
+	struct snd_soc_dapm_context *dapm = &codec->dapm;
+	int ret;
+
+	printk(KERN_DEBUG
+			"at91sam9g20ek_wm8731 "
+			": at91sam9g20ek_wm8731_init() called\n");
+
+	ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK_MCLK,
+		MCLK_RATE, SND_SOC_CLOCK_IN);
+	if (ret < 0) {
+		printk(KERN_ERR "Failed to set WM8731 SYSCLK: %d\n", ret);
+		return ret;
+	}
+
+	/* Add specific widgets */
+	snd_soc_dapm_new_controls(dapm, at91sam9g20ek_dapm_widgets,
+				  ARRAY_SIZE(at91sam9g20ek_dapm_widgets));
+	/* Set up specific audio path interconnects */
+	snd_soc_dapm_add_routes(dapm, intercon, ARRAY_SIZE(intercon));
+
+	/* not connected */
+	snd_soc_dapm_nc_pin(dapm, "RLINEIN");
+	snd_soc_dapm_nc_pin(dapm, "LLINEIN");
+
+#ifdef ENABLE_MIC_INPUT
+	snd_soc_dapm_enable_pin(dapm, "Int Mic");
+#else
+	snd_soc_dapm_nc_pin(dapm, "Int Mic");
+#endif
+
+	/* always connected */
+	snd_soc_dapm_enable_pin(dapm, "Ext Spk");
+
+	return 0;
+}
+
+static struct snd_soc_dai_link at91sam9g20ek_dai = {
+	.name = "WM8731",
+	.stream_name = "WM8731 PCM",
+	.cpu_dai_name = "atmel-ssc-dai.0",
+	.codec_dai_name = "wm8731-hifi",
+	.init = at91sam9g20ek_wm8731_init,
+	.platform_name = "atmel-pcm-audio",
+	.codec_name = "wm8731.0-001b",
+	.ops = &at91sam9g20ek_ops,
+};
+
+static struct snd_soc_card snd_soc_at91sam9g20ek = {
+	.name = "AT91SAMG20-EK",
+	.owner = THIS_MODULE,
+	.dai_link = &at91sam9g20ek_dai,
+	.num_links = 1,
+	.set_bias_level = at91sam9g20ek_set_bias_level,
+};
+
+static struct platform_device *at91sam9g20ek_snd_device;
+
+static int __init at91sam9g20ek_init(void)
+{
+	struct clk *pllb;
+	int ret;
+
+	if (!(machine_is_at91sam9g20ek() || machine_is_at91sam9g20ek_2mmc()))
+		return -ENODEV;
+
+	ret = atmel_ssc_set_audio(0);
+	if (ret != 0) {
+		pr_err("Failed to set SSC 0 for audio: %d\n", ret);
+		return ret;
+	}
+
+	/*
+	 * Codec MCLK is supplied by PCK0 - set it up.
+	 */
+	mclk = clk_get(NULL, "pck0");
+	if (IS_ERR(mclk)) {
+		printk(KERN_ERR "ASoC: Failed to get MCLK\n");
+		ret = PTR_ERR(mclk);
+		goto err;
+	}
+
+	pllb = clk_get(NULL, "pllb");
+	if (IS_ERR(pllb)) {
+		printk(KERN_ERR "ASoC: Failed to get PLLB\n");
+		ret = PTR_ERR(pllb);
+		goto err_mclk;
+	}
+	ret = clk_set_parent(mclk, pllb);
+	clk_put(pllb);
+	if (ret != 0) {
+		printk(KERN_ERR "ASoC: Failed to set MCLK parent\n");
+		goto err_mclk;
+	}
+
+	clk_set_rate(mclk, MCLK_RATE);
+
+	at91sam9g20ek_snd_device = platform_device_alloc("soc-audio", -1);
+	if (!at91sam9g20ek_snd_device) {
+		printk(KERN_ERR "ASoC: Platform device allocation failed\n");
+		ret = -ENOMEM;
+		goto err_mclk;
+	}
+
+	platform_set_drvdata(at91sam9g20ek_snd_device,
+			&snd_soc_at91sam9g20ek);
+
+	ret = platform_device_add(at91sam9g20ek_snd_device);
+	if (ret) {
+		printk(KERN_ERR "ASoC: Platform device allocation failed\n");
+		goto err_device_add;
+	}
+
+	return ret;
+
+err_device_add:
+	platform_device_put(at91sam9g20ek_snd_device);
+err_mclk:
+	clk_put(mclk);
+	mclk = NULL;
+err:
+	return ret;
+}
+
+static void __exit at91sam9g20ek_exit(void)
+{
+	platform_device_unregister(at91sam9g20ek_snd_device);
+	at91sam9g20ek_snd_device = NULL;
+	clk_put(mclk);
+	mclk = NULL;
+}
+
+module_init(at91sam9g20ek_init);
+module_exit(at91sam9g20ek_exit);
+
+/* Module information */
+MODULE_AUTHOR("Sedji Gaouaou <sedji.gaouaou@atmel.com>");
+MODULE_DESCRIPTION("ALSA SoC AT91SAM9G20EK_WM8731");
+MODULE_LICENSE("GPL");