--- /dev/null
+diff -urN linux-2.6.28-rc6/sound/soc/at91/at91sam9g20ek_wm8731.c linux-2.6.28-rc6-0rig/sound/soc/at91/at91sam9g20ek_wm8731.c
+--- linux-2.6.28-rc6/sound/soc/at91/at91sam9g20ek_wm8731.c 1970-01-01 01:00:00.000000000 +0100
++++ linux-2.6.28-rc6-0rig/sound/soc/at91/at91sam9g20ek_wm8731.c 2008-11-29 20:33:23.000000000 +0100
+@@ -0,0 +1,383 @@
++/*
++ * at91sam9g20ek_wm8731 -- SoC audio for AT91SAM9G20-based Atmel AT91SAM9G20EK board.
++ *
++ * Author: Ulf Samuelsson <ulf.samuelsson@atmel.com>
++ * Atmel Nordic AB.
++ * Created: Mar 29, 2006
++ *
++ * Based on eti_b1_wm8731.c by:
++ *
++ * Authors: Frank Mandarino <fmandarino@endrelia.com>
++ *
++ * which is based on corgi.c by:
++ *
++ * Copyright 2005 Wolfson Microelectronics PLC.
++ * Copyright 2005 Openedhand Ltd.
++ *
++ * Authors: Liam Girdwood <liam.girdwood@wolfsonmicro.com>
++ * Richard Purdie <richard@openedhand.com>
++ *
++ * 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.
++ *
++ */
++
++#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 <sound/core.h>
++#include <sound/pcm.h>
++#include <sound/soc.h>
++#include <sound/soc-dapm.h>
++
++#include <mach/hardware.h>
++#include <mach/gpio.h>
++
++#include "../codecs/wm8731.h"
++#include "at91-pcm.h"
++#include "at91-ssc.h"
++
++#define AT91SAM9G20_BASE_SSC AT91SAM9260_BASE_SSC
++#define AT91SAM9G20_ID_SSC AT91SAM9260_ID_SSC
++
++
++#if 0
++#define DBG(x...) printk(KERN_INFO "at91sam9g20ek_wm8731: " x)
++#else
++#define DBG(x...)
++#endif
++
++static struct clk *pck1_clk;
++static struct clk *pllb_clk;
++
++
++static int at91sam9g20ek_startup(struct snd_pcm_substream *substream)
++{
++ struct snd_soc_pcm_runtime *rtd = substream->private_data;
++ struct snd_soc_dai *codec_dai = rtd->dai->codec_dai;
++ struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
++ int ret;
++
++ /* cpu clock is the AT91 master clock sent to the SSC */
++ ret = snd_soc_dai_set_sysclk(cpu_dai, AT91_SYSCLK_MCK,
++ 100000000, SND_SOC_CLOCK_IN);
++ if (ret < 0)
++ return ret;
++
++ /* codec system clock is supplied by PCK1, set to 12MHz */
++ ret = snd_soc_dai_set_sysclk(codec_dai, WM8731_SYSCLK,
++ 12000000, SND_SOC_CLOCK_IN);
++ if (ret < 0)
++ return ret;
++
++ /* Start PCK1 clock. */
++ clk_enable(pck1_clk);
++ DBG("pck1 started\n");
++
++ return 0;
++}
++
++static void at91sam9g20ek_shutdown(struct snd_pcm_substream *substream)
++{
++ /* Stop PCK1 clock. */
++ clk_disable(pck1_clk);
++ DBG("pck1 stopped\n");
++}
++
++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->dai->codec_dai;
++ struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
++ int ret;
++
++#ifdef CONFIG_SND_AT91_SOC_AT91SAM9G20EK_SLAVE
++ unsigned int rate;
++ int cmr_div, period;
++
++ /* set codec DAI configuration */
++ ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
++ SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
++ 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_CBS_CFS);
++ if (ret < 0)
++ return ret;
++
++ /*
++ * The SSC clock dividers depend on the sample rate. The CMR.DIV
++ * field divides the system master clock MCK to drive the SSC TK
++ * signal which provides the codec BCLK. The TCMR.PERIOD and
++ * RCMR.PERIOD fields further divide the BCLK signal to drive
++ * the SSC TF and RF signals which provide the codec DACLRC and
++ * ADCLRC clocks.
++ *
++ * The dividers were determined through trial and error, where a
++ * CMR.DIV value is chosen such that the resulting BCLK value is
++ * divisible, or almost divisible, by (2 * sample rate), and then
++ * the TCMR.PERIOD or RCMR.PERIOD is BCLK / (2 * sample rate) - 1.
++ */
++
++ /*
++ * 8000: P=25 D=124 IF=2000000.00 OF= 8000.00 ERROR=0.000000
++ * 16000: P=22 D=70 IF=2272727.27 OF=16005.12 ERROR=0.000320
++ * 32000: P=17 D=45 IF=2941176.47 OF=31969.31 ERROR=0.000959
++ * 48000: P=13 D=39 IF=3846153.85 OF=48076.92 ERROR=0.001603
++ * 11025: P=14 D=161 IF=3571428.57 OF=11022.93 ERROR=0.000188
++ * 22050: P=14 D=80 IF=3571428.57 OF=22045.86 ERROR=0.000188
++ * 44100: P=21 D=26 IF=2380952.38 OF=44091.71 ERROR=0.000188
++ */
++ rate = params_rate(params);
++
++ switch (rate) {
++ case 8000:
++ cmr_div = 25; /* BCLK = 100MHz/(2*25) = 2.000000MHz */
++ period = 124; /* LRC = BCLK/(2*(124+1)) = 8000Hz */
++ break;
++ case 16000:
++ cmr_div = 22; /* BCLK = 100MHz/(2*22) ~= 2,272727MHz */
++ period = 70; /* LRC = BCLK/(2*(70+1)) = 16005.12Hz */
++ break;
++ case 32000:
++ cmr_div = 17; /* BCLK = 100MHz/(2*17) ~= 2.941176MHz */
++ period = 45; /* LRC = BCLK/(2*(45+1)) = 31969.31Hz */
++ break;
++ case 48000:
++ cmr_div = 13; /* BCLK = 100MHz/(2*13) ~= 3.846154MHz */
++ period = 39; /* LRC = BCLK/(2*(39+1)) = 48076.92Hz */
++ break;
++ case 11025:
++ cmr_div = 14; /* BCLK = 100MHz/(2*14) ~= 3.571429MHz */
++ period = 161; /* LRC = BCLK/(2*(161+1)) = 11022.93Hz */
++ break;
++ case 22050:
++ cmr_div = 14; /* BCLK = 100MHz/(2*14) ~= 3.571429MHz */
++ period = 80; /* LRC = BCLK/(2*(80+1)) = 22045.86Hz */
++ break;
++ case 44100:
++ cmr_div = 21; /* BCLK = 100MHz/(2*21) ~= 2.380952MHz */
++ period = 26; /* LRC = BCLK/(2*(26+1)) = 44091.71Hz */
++ break;
++ default:
++ printk(KERN_WARNING "unsupported rate %d on AT91SAM9G20EK board\n", rate);
++ return -EINVAL;
++ }
++
++ /* set the MCK divider for BCLK */
++ ret = snd_soc_dai_set_clkdiv(cpu_dai, AT91SSC_CMR_DIV, cmr_div);
++ if (ret < 0)
++ return ret;
++
++ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
++ /* set the BCLK divider for DACLRC */
++ ret = snd_soc_dai_set_clkdiv(cpu_dai,
++ AT91SSC_TCMR_PERIOD, period);
++ } else {
++ /* set the BCLK divider for ADCLRC */
++ ret = snd_soc_dai_set_clkdiv(cpu_dai,
++ AT91SSC_RCMR_PERIOD, period);
++ }
++ if (ret < 0)
++ return ret;
++
++#else /* CONFIG_SND_AT91_SOC_AT91SAM9G20EK_SLAVE */
++ /*
++ * Codec in Master Mode.
++ */
++
++ /* 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;
++
++#endif /* CONFIG_SND_AT91_SOC_AT91SAM9G20EK_SLAVE */
++
++ return 0;
++}
++
++static struct snd_soc_ops at91sam9g20ek_ops = {
++ .startup = at91sam9g20ek_startup,
++ .hw_params = at91sam9g20ek_hw_params,
++ .shutdown = at91sam9g20ek_shutdown,
++};
++
++
++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 Atmel AT91SAM9G20EK board.
++ */
++static int at91sam9g20ek_wm8731_init(struct snd_soc_codec *codec)
++{
++ DBG("at91sam9g20ek_wm8731_init() called\n");
++
++ /* Add specific widgets */
++ snd_soc_dapm_new_controls(codec, at91sam9g20ek_dapm_widgets,
++ ARRAY_SIZE(at91sam9g20ek_dapm_widgets));
++
++ /* Set up specific audio path interconnects */
++ snd_soc_dapm_add_route(codec, intercon, ARRAY_SIZE(intercon));
++
++ /* not connected */
++ snd_soc_dapm_disable_pin(codec, "RLINEIN");
++ snd_soc_dapm_disable_pin(codec, "LLINEIN");
++
++ /* always connected */
++ snd_soc_dapm_enable_pin(codec, "Int Mic");
++ snd_soc_dapm_enable_pin(codec, "Ext Spk");
++
++ snd_soc_dapm_sync(codec);
++
++ return 0;
++}
++
++static struct snd_soc_dai_link at91sam9g20ek_dai = {
++ .name = "WM8731",
++ .stream_name = "WM8731 PCM",
++ .cpu_dai = &at91_ssc_dai[1],
++ .codec_dai = &wm8731_dai,
++ .init = at91sam9g20ek_wm8731_init,
++ .ops = &at91sam9g20ek_ops,
++};
++
++static struct snd_soc_machine snd_soc_machine_at91sam9g20ek = {
++ .name = "AT91SAM9G20EK_WM8731",
++ .dai_link = &at91sam9g20ek_dai,
++ .num_links = 1,
++};
++
++static struct wm8731_setup_data at91sam9g20ek_wm8731_setup = {
++ .i2c_address = 0x1a,
++};
++
++static struct snd_soc_device at91sam9g20ek_snd_devdata = {
++ .machine = &snd_soc_machine_at91sam9g20ek,
++ .platform = &at91_soc_platform,
++ .codec_dev = &soc_codec_dev_wm8731,
++ .codec_data = &at91sam9g20ek_wm8731_setup,
++};
++
++static struct platform_device *at91sam9g20ek_snd_device;
++
++static int __init at91sam9g20ek_init(void)
++{
++ int ret;
++ struct at91_ssc_periph *ssc = at91sam9g20ek_dai.cpu_dai->private_data;
++
++ if (!request_mem_region(AT91SAM9G20_BASE_SSC, SZ_16K, "soc-audio")) {
++ DBG("SSC memory region is busy\n");
++ return -EBUSY;
++ }
++
++ ssc->base = ioremap(AT91SAM9G20_BASE_SSC, SZ_16K);
++ if (!ssc->base) {
++ DBG("SSC memory ioremap failed\n");
++ ret = -ENOMEM;
++ goto fail_release_mem;
++ }
++
++ ssc->pid = AT91SAM9G20_ID_SSC;
++
++ at91sam9g20ek_snd_device = platform_device_alloc("soc-audio", -1);
++ if (!at91sam9g20ek_snd_device) {
++ DBG("platform device allocation failed\n");
++ ret = -ENOMEM;
++ goto fail_io_unmap;
++ }
++
++ platform_set_drvdata(at91sam9g20ek_snd_device, &at91sam9g20ek_snd_devdata);
++ at91sam9g20ek_snd_devdata.dev = &at91sam9g20ek_snd_device->dev;
++
++ ret = platform_device_add(at91sam9g20ek_snd_device);
++ if (ret) {
++ DBG("platform device add failed\n");
++ platform_device_put(at91sam9g20ek_snd_device);
++ goto fail_io_unmap;
++ }
++
++ at91_set_A_periph(AT91_PIN_PB16, 0); /* TK0 */
++ at91_set_A_periph(AT91_PIN_PB17, 0); /* TF0 */
++ at91_set_A_periph(AT91_PIN_PB18, 0); /* TD0 */
++#if 0 /* Bidirectional support not available on the SAM9G20EK */
++ at91_set_A_periph(AT91_PIN_PB19, 0); /* RD0 */
++ at91_set_A_periph(AT91_PIN_PB20, 0); /* RK0 */
++ at91_set_A_periph(AT91_PIN_PB21, 0); /* RF0 */
++#endif
++ /*
++ * Set PCK1 parent to PLLB and its rate to 12 Mhz.
++ */
++ pllb_clk = clk_get(NULL, "pllb");
++ pck1_clk = clk_get(NULL, "pck1");
++
++ clk_set_parent(pck1_clk, pllb_clk);
++ clk_set_rate(pck1_clk, 12000000);
++
++ DBG("MCLK rate %luHz\n", clk_get_rate(pck1_clk));
++
++ /* assign the GPIO pin to PCK1 */
++ at91_set_B_periph(AT91_PIN_PC1, 0);
++
++#ifdef CONFIG_SND_AT91_SOC_AT91SAM9G20EK_SLAVE
++ printk(KERN_INFO "at91sam9g20ek_wm8731: Codec in Slave Mode\n");
++#else
++ printk(KERN_INFO "at91sam9g20ek_wm8731: Codec in Master Mode\n");
++#endif
++ return ret;
++
++fail_io_unmap:
++ iounmap(ssc->base);
++fail_release_mem:
++ release_mem_region(AT91SAM9G20_BASE_SSC, SZ_16K);
++ return ret;
++}
++
++static void __exit at91sam9g20ek_exit(void)
++{
++ struct at91_ssc_periph *ssc = at91sam9g20ek_dai.cpu_dai->private_data;
++
++ clk_put(pck1_clk);
++ clk_put(pllb_clk);
++
++ platform_device_unregister(at91sam9g20ek_snd_device);
++
++ iounmap(ssc->base);
++ release_mem_region(AT91SAM9G20_BASE_SSC, SZ_16K);
++}
++
++module_init(at91sam9g20ek_init);
++module_exit(at91sam9g20ek_exit);
++
++/* Module information */
++MODULE_AUTHOR("Ulf Samuelsson <ulf.samuelsson@atmel.com>");
++MODULE_DESCRIPTION("ALSA SoC AT91SAM9G20EK-WM8731");
++MODULE_LICENSE("GPL");
+diff -urN linux-2.6.28-rc6/sound/soc/at91/Kconfig linux-2.6.28-rc6-0rig/sound/soc/at91/Kconfig
+--- linux-2.6.28-rc6/sound/soc/at91/Kconfig 2008-10-10 00:13:53.000000000 +0200
++++ linux-2.6.28-rc6-0rig/sound/soc/at91/Kconfig 2008-11-29 20:39:30.000000000 +0100
+@@ -25,3 +25,20 @@
+ help
+ Say Y if you want to run with the AT91 SSC generating the BCLK
+ and LRC signals on Endrelia boards.
++
++config SND_AT91_SOC_AT91SAM9G20EK_WM8731
++ tristate "SoC Audio support for WM8731-based Atmel AT91SAM9G20EK boards"
++ depends on SND_AT91_SOC && (MACH_AT91SAM9G20EK)
++ select SND_AT91_SOC_SSC
++ select SND_SOC_WM8731
++ help
++ Say Y if you want to add support for SoC audio on WM8731-based
++ Atmel AT91SAM9G20EK boards.
++
++config SND_AT91_SOC_AT91SAM9G20EK_SLAVE
++ bool "Run codec in slave Mode on the AT91SAM92G20EK board"
++ depends on SND_AT91_SOC_AT91SAM9G20EK_WM8731
++ default n
++ help
++ Say Y if you want to run with the AT91 SSC generating the BCLK
++ and LRC signals on Atmel boards.
+diff -urN linux-2.6.28-rc6/sound/soc/at91/Makefile linux-2.6.28-rc6-0rig/sound/soc/at91/Makefile
+--- linux-2.6.28-rc6/sound/soc/at91/Makefile 2008-10-10 00:13:53.000000000 +0200
++++ linux-2.6.28-rc6-0rig/sound/soc/at91/Makefile 2008-11-29 20:39:35.000000000 +0100
+@@ -7,5 +7,8 @@
+
+ # AT91 Machine Support
+ snd-soc-eti-b1-wm8731-objs := eti_b1_wm8731.o
++snd-soc-at91sam9g20ek-wm8731-objs := at91sam9g20ek_wm8731.o
+
+ obj-$(CONFIG_SND_AT91_SOC_ETI_B1_WM8731) += snd-soc-eti-b1-wm8731.o
++obj-$(CONFIG_SND_AT91_SOC_AT91SAM9G20_WM8731) += snd-soc-at91sam9g20ek-wm8731.o
++
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