Merge branch 'master' into 85xx

7 files changed, 1669 insertions, 0 deletions

diff --git a/sound/soc/at91/Kconfig b/sound/soc/at91/Kconfig
new file mode 100644
index 00000000000..5bcf08b728b
--- /dev/null
+++ b/sound/soc/at91/Kconfig
@@ -0,0 +1,32 @@
+menu "SoC Audio for the Atmel AT91"
+
+config SND_AT91_SOC
+	tristate "SoC Audio for the Atmel AT91 System-on-Chip"
+	depends on ARCH_AT91 && SND
+	select SND_PCM
+	help
+	  Say Y or M if you want to add support for codecs attached to
+	  the AT91 SSC interface. You will also need
+	  to select the audio interfaces to support below.
+
+config SND_AT91_SOC_I2S
+	tristate
+
+config SND_AT91_SOC_ETI_B1_WM8731
+	tristate "SoC I2S Audio support for WM8731-based Endrelia ETI-B1 boards"
+	depends on SND_AT91_SOC && (MACH_ETI_B1 || MACH_ETI_C1)
+	select SND_AT91_SOC_I2S
+	select SND_SOC_WM8731
+	help
+	  Say Y if you want to add support for SoC audio on WM8731-based
+	  Endrelia Technologies Inc ETI-B1 or ETI-C1 boards.
+
+config SND_AT91_SOC_ETI_SLAVE
+	bool "Run codec in slave Mode on Endrelia boards"
+	depends on SND_AT91_SOC_ETI_B1_WM8731
+	default n
+	help
+	  Say Y if you want to run with the AT91 SSC generating the BCLK
+	  and LRC signals on Endrelia boards.
+
+endmenu
diff --git a/sound/soc/at91/Makefile b/sound/soc/at91/Makefile
new file mode 100644
index 00000000000..b77b01ab202
--- /dev/null
+++ b/sound/soc/at91/Makefile
@@ -0,0 +1,11 @@
+# AT91 Platform Support
+snd-soc-at91-objs := at91-pcm.o
+snd-soc-at91-i2s-objs := at91-i2s.o
+
+obj-$(CONFIG_SND_AT91_SOC) += snd-soc-at91.o
+obj-$(CONFIG_SND_AT91_SOC_I2S) += snd-soc-at91-i2s.o
+
+# AT91 Machine Support
+snd-soc-eti-b1-wm8731-objs := eti_b1_wm8731.o
+
+obj-$(CONFIG_SND_AT91_SOC_ETI_B1_WM8731) += snd-soc-eti-b1-wm8731.o
diff --git a/sound/soc/at91/at91-i2s.c b/sound/soc/at91/at91-i2s.c
new file mode 100644
index 00000000000..fcc544a96ba
--- /dev/null
+++ b/sound/soc/at91/at91-i2s.c
@@ -0,0 +1,720 @@
+/*
+ * at91-i2s.c  --  ALSA SoC I2S Audio Layer Platform driver
+ *
+ * Author: Frank Mandarino <fmandarino@endrelia.com>
+ *         Endrelia Technologies Inc.
+ *
+ * Based on pxa2xx Platform drivers by
+ * Liam Girdwood <liam.girdwood@wolfsonmicro.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/init.h>
+#include <linux/module.h>
+#include <linux/interrupt.h>
+#include <linux/device.h>
+#include <linux/delay.h>
+#include <linux/clk.h>
+#include <sound/driver.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/initval.h>
+#include <sound/soc.h>
+
+#include <asm/arch/hardware.h>
+#include <asm/arch/at91_pmc.h>
+#include <asm/arch/at91_ssc.h>
+#include <asm/arch/at91_pdc.h>
+
+#include "at91-pcm.h"
+#include "at91-i2s.h"
+
+#if 0
+#define	DBG(x...)	printk(KERN_DEBUG "at91-i2s:" x)
+#else
+#define	DBG(x...)
+#endif
+
+#if defined(CONFIG_ARCH_AT91SAM9260)
+#define NUM_SSC_DEVICES		1
+#else
+#define NUM_SSC_DEVICES		3
+#endif
+
+
+/*
+ * SSC PDC registers required by the PCM DMA engine.
+ */
+static struct at91_pdc_regs pdc_tx_reg = {
+	.xpr		= AT91_PDC_TPR,
+	.xcr		= AT91_PDC_TCR,
+	.xnpr		= AT91_PDC_TNPR,
+	.xncr		= AT91_PDC_TNCR,
+};
+
+static struct at91_pdc_regs pdc_rx_reg = {
+	.xpr		= AT91_PDC_RPR,
+	.xcr		= AT91_PDC_RCR,
+	.xnpr		= AT91_PDC_RNPR,
+	.xncr		= AT91_PDC_RNCR,
+};
+
+/*
+ * SSC & PDC status bits for transmit and receive.
+ */
+static struct at91_ssc_mask ssc_tx_mask = {
+	.ssc_enable	= AT91_SSC_TXEN,
+	.ssc_disable	= AT91_SSC_TXDIS,
+	.ssc_endx	= AT91_SSC_ENDTX,
+	.ssc_endbuf	= AT91_SSC_TXBUFE,
+	.pdc_enable	= AT91_PDC_TXTEN,
+	.pdc_disable	= AT91_PDC_TXTDIS,
+};
+
+static struct at91_ssc_mask ssc_rx_mask = {
+	.ssc_enable	= AT91_SSC_RXEN,
+	.ssc_disable	= AT91_SSC_RXDIS,
+	.ssc_endx	= AT91_SSC_ENDRX,
+	.ssc_endbuf	= AT91_SSC_RXBUFF,
+	.pdc_enable	= AT91_PDC_RXTEN,
+	.pdc_disable	= AT91_PDC_RXTDIS,
+};
+
+
+/*
+ * DMA parameters.
+ */
+static struct at91_pcm_dma_params ssc_dma_params[NUM_SSC_DEVICES][2] = {
+	{{
+	.name		= "SSC0/I2S PCM Stereo out",
+	.pdc		= &pdc_tx_reg,
+	.mask		= &ssc_tx_mask,
+	},
+	{
+	.name		= "SSC0/I2S PCM Stereo in",
+	.pdc		= &pdc_rx_reg,
+	.mask		= &ssc_rx_mask,
+	}},
+#if NUM_SSC_DEVICES == 3
+	{{
+	.name		= "SSC1/I2S PCM Stereo out",
+	.pdc		= &pdc_tx_reg,
+	.mask		= &ssc_tx_mask,
+	},
+	{
+	.name		= "SSC1/I2S PCM Stereo in",
+	.pdc		= &pdc_rx_reg,
+	.mask		= &ssc_rx_mask,
+	}},
+	{{
+	.name		= "SSC2/I2S PCM Stereo out",
+	.pdc		= &pdc_tx_reg,
+	.mask		= &ssc_tx_mask,
+	},
+	{
+	.name		= "SSC1/I2S PCM Stereo in",
+	.pdc		= &pdc_rx_reg,
+	.mask		= &ssc_rx_mask,
+	}},
+#endif
+};
+
+struct at91_ssc_state {
+	u32	ssc_cmr;
+	u32	ssc_rcmr;
+	u32	ssc_rfmr;
+	u32	ssc_tcmr;
+	u32	ssc_tfmr;
+	u32	ssc_sr;
+	u32	ssc_imr;
+};
+
+static struct at91_ssc_info {
+	char		*name;
+	struct at91_ssc_periph ssc;
+	spinlock_t 	lock;		/* lock for dir_mask */
+	unsigned short	dir_mask;	/* 0=unused, 1=playback, 2=capture */
+	unsigned short	initialized;	/* 1=SSC has been initialized */
+	unsigned short	daifmt;
+	unsigned short	cmr_div;
+	unsigned short	tcmr_period;
+	unsigned short	rcmr_period;
+	struct at91_pcm_dma_params *dma_params[2];
+	struct at91_ssc_state ssc_state;
+
+} ssc_info[NUM_SSC_DEVICES] = {
+	{
+	.name		= "ssc0",
+	.lock		= SPIN_LOCK_UNLOCKED,
+	.dir_mask	= 0,
+	.initialized	= 0,
+	},
+#if NUM_SSC_DEVICES == 3
+	{
+	.name		= "ssc1",
+	.lock		= SPIN_LOCK_UNLOCKED,
+	.dir_mask	= 0,
+	.initialized	= 0,
+	},
+	{
+	.name		= "ssc2",
+	.lock		= SPIN_LOCK_UNLOCKED,
+	.dir_mask	= 0,
+	.initialized	= 0,
+	},
+#endif
+};
+
+static unsigned int at91_i2s_sysclk;
+
+/*
+ * SSC interrupt handler.  Passes PDC interrupts to the DMA
+ * interrupt handler in the PCM driver.
+ */
+static irqreturn_t at91_i2s_interrupt(int irq, void *dev_id)
+{
+	struct at91_ssc_info *ssc_p = dev_id;
+	struct at91_pcm_dma_params *dma_params;
+	u32 ssc_sr;
+	int i;
+
+	ssc_sr = at91_ssc_read(ssc_p->ssc.base + AT91_SSC_SR)
+			& at91_ssc_read(ssc_p->ssc.base + AT91_SSC_IMR);
+
+	/*
+	 * Loop through the substreams attached to this SSC.  If
+	 * a DMA-related interrupt occurred on that substream, call
+	 * the DMA interrupt handler function, if one has been
+	 * registered in the dma_params structure by the PCM driver.
+	 */
+	for (i = 0; i < ARRAY_SIZE(ssc_p->dma_params); i++) {
+		dma_params = ssc_p->dma_params[i];
+
+		if (dma_params != NULL && dma_params->dma_intr_handler != NULL &&
+			(ssc_sr &
+			(dma_params->mask->ssc_endx | dma_params->mask->ssc_endbuf)))
+
+			dma_params->dma_intr_handler(ssc_sr, dma_params->substream);
+	}
+
+	return IRQ_HANDLED;
+}
+
+/*
+ * Startup.  Only that one substream allowed in each direction.
+ */
+static int at91_i2s_startup(struct snd_pcm_substream *substream)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct at91_ssc_info *ssc_p = &ssc_info[rtd->dai->cpu_dai->id];
+	int dir_mask;
+
+	DBG("i2s_startup: SSC_SR=0x%08lx\n",
+			at91_ssc_read(ssc_p->ssc.base + AT91_SSC_SR));
+	dir_mask = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 0x1 : 0x2;
+
+	spin_lock_irq(&ssc_p->lock);
+	if (ssc_p->dir_mask & dir_mask) {
+		spin_unlock_irq(&ssc_p->lock);
+		return -EBUSY;
+	}
+	ssc_p->dir_mask |= dir_mask;
+	spin_unlock_irq(&ssc_p->lock);
+
+	return 0;
+}
+
+/*
+ * Shutdown.  Clear DMA parameters and shutdown the SSC if there
+ * are no other substreams open.
+ */
+static void at91_i2s_shutdown(struct snd_pcm_substream *substream)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct at91_ssc_info *ssc_p = &ssc_info[rtd->dai->cpu_dai->id];
+	struct at91_pcm_dma_params *dma_params;
+	int dir, dir_mask;
+
+	dir = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 0 : 1;
+	dma_params = ssc_p->dma_params[dir];
+
+	if (dma_params != NULL) {
+		at91_ssc_write(dma_params->ssc_base + AT91_SSC_CR,
+				dma_params->mask->ssc_disable);
+		DBG("%s disabled SSC_SR=0x%08lx\n", (dir ? "receive" : "transmit"),
+			at91_ssc_read(ssc_p->ssc.base + AT91_SSC_SR));
+
+		dma_params->ssc_base = NULL;
+		dma_params->substream = NULL;
+		ssc_p->dma_params[dir] = NULL;
+	}
+
+	dir_mask = 1 << dir;
+
+	spin_lock_irq(&ssc_p->lock);
+	ssc_p->dir_mask &= ~dir_mask;
+	if (!ssc_p->dir_mask) {
+		/* Shutdown the SSC clock. */
+		DBG("Stopping pid %d clock\n", ssc_p->ssc.pid);
+		at91_sys_write(AT91_PMC_PCDR, 1<<ssc_p->ssc.pid);
+
+		if (ssc_p->initialized) {
+			free_irq(ssc_p->ssc.pid, ssc_p);
+			ssc_p->initialized = 0;
+		}
+
+		/* Reset the SSC */
+		at91_ssc_write(ssc_p->ssc.base + AT91_SSC_CR, AT91_SSC_SWRST);
+
+		/* Clear the SSC dividers */
+		ssc_p->cmr_div = ssc_p->tcmr_period = ssc_p->rcmr_period = 0;
+	}
+	spin_unlock_irq(&ssc_p->lock);
+}
+
+/*
+ * Record the SSC system clock rate.
+ */
+static int at91_i2s_set_dai_sysclk(struct snd_soc_cpu_dai *cpu_dai,
+		int clk_id, unsigned int freq, int dir)
+{
+	/*
+	 * The only clock supplied to the SSC is the AT91 master clock,
+	 * which is only used if the SSC is generating BCLK and/or
+	 * LRC clocks.
+	 */
+	switch (clk_id) {
+	case AT91_SYSCLK_MCK:
+		at91_i2s_sysclk = freq;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+/*
+ * Record the DAI format for use in hw_params().
+ */
+static int at91_i2s_set_dai_fmt(struct snd_soc_cpu_dai *cpu_dai,
+		unsigned int fmt)
+{
+	struct at91_ssc_info *ssc_p = &ssc_info[cpu_dai->id];
+
+	if ((fmt & SND_SOC_DAIFMT_FORMAT_MASK) != SND_SOC_DAIFMT_I2S)
+		return -EINVAL;
+
+	ssc_p->daifmt = fmt;
+	return 0;
+}
+
+/*
+ * Record SSC clock dividers for use in hw_params().
+ */
+static int at91_i2s_set_dai_clkdiv(struct snd_soc_cpu_dai *cpu_dai,
+	int div_id, int div)
+{
+	struct at91_ssc_info *ssc_p = &ssc_info[cpu_dai->id];
+
+	switch (div_id) {
+	case AT91SSC_CMR_DIV:
+		/*
+		 * The same master clock divider is used for both
+		 * transmit and receive, so if a value has already
+		 * been set, it must match this value.
+		 */
+		if (ssc_p->cmr_div == 0)
+			ssc_p->cmr_div = div;
+		else
+			if (div != ssc_p->cmr_div)
+				return -EBUSY;
+		break;
+
+	case AT91SSC_TCMR_PERIOD:
+		ssc_p->tcmr_period = div;
+		break;
+
+	case AT91SSC_RCMR_PERIOD:
+		ssc_p->rcmr_period = div;
+		break;
+
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+/*
+ * Configure the SSC.
+ */
+static int at91_i2s_hw_params(struct snd_pcm_substream *substream,
+	struct snd_pcm_hw_params *params)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	int id = rtd->dai->cpu_dai->id;
+	struct at91_ssc_info *ssc_p = &ssc_info[id];
+	struct at91_pcm_dma_params *dma_params;
+	int dir, channels, bits;
+	u32 tfmr, rfmr, tcmr, rcmr;
+	int start_event;
+	int ret;
+
+	/*
+	 * Currently, there is only one set of dma params for
+	 * each direction.  If more are added, this code will
+	 * have to be changed to select the proper set.
+	 */
+	dir = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 0 : 1;
+
+	dma_params = &ssc_dma_params[id][dir];
+	dma_params->ssc_base = ssc_p->ssc.base;
+	dma_params->substream = substream;
+
+	ssc_p->dma_params[dir] = dma_params;
+
+	/*
+	 * The cpu_dai->dma_data field is only used to communicate the
+	 * appropriate DMA parameters to the pcm driver hw_params()
+	 * function.  It should not be used for other purposes
+	 * as it is common to all substreams.
+	 */
+	rtd->dai->cpu_dai->dma_data = dma_params;
+
+	channels = params_channels(params);
+
+	/*
+	 * The SSC only supports up to 16-bit samples in I2S format, due
+	 * to the size of the Frame Mode Register FSLEN field.  Also, I2S
+	 * implies signed data.
+	 */
+	bits = 16;
+	dma_params->pdc_xfer_size = 2;
+
+	/*
+	 * Compute SSC register settings.
+	 */
+	switch (ssc_p->daifmt) {
+	case SND_SOC_DAIFMT_CBS_CFS:
+		/*
+		 * SSC provides BCLK and LRC clocks.
+		 *
+		 * The SSC transmit and receive clocks are generated from the
+		 * MCK divider, and the BCLK signal is output on the SSC TK line.
+		 */
+		rcmr =	  (( ssc_p->rcmr_period		<< 24) & AT91_SSC_PERIOD)
+			| (( 1				<< 16) & AT91_SSC_STTDLY)
+			| (( AT91_SSC_START_FALLING_RF	     ) & AT91_SSC_START)
+			| (( AT91_SSC_CK_RISING		     ) & AT91_SSC_CKI)
+			| (( AT91_SSC_CKO_NONE		     ) & AT91_SSC_CKO)
+			| (( AT91_SSC_CKS_DIV		     ) & AT91_SSC_CKS);
+
+		rfmr =	  (( AT91_SSC_FSEDGE_POSITIVE	     ) & AT91_SSC_FSEDGE)
+			| (( AT91_SSC_FSOS_NEGATIVE	     ) & AT91_SSC_FSOS)
+			| (((bits - 1)			<< 16) & AT91_SSC_FSLEN)
+			| (((channels - 1)		<<  8) & AT91_SSC_DATNB)
+			| (( 1				<<  7) & AT91_SSC_MSBF)
+			| (( 0				<<  5) & AT91_SSC_LOOP)
+			| (((bits - 1)			<<  0) & AT91_SSC_DATALEN);
+
+		tcmr =	  (( ssc_p->tcmr_period		<< 24) & AT91_SSC_PERIOD)
+			| (( 1				<< 16) & AT91_SSC_STTDLY)
+			| (( AT91_SSC_START_FALLING_RF       ) & AT91_SSC_START)
+			| (( AT91_SSC_CKI_FALLING	     ) & AT91_SSC_CKI)
+			| (( AT91_SSC_CKO_CONTINUOUS	     ) & AT91_SSC_CKO)
+			| (( AT91_SSC_CKS_DIV		     ) & AT91_SSC_CKS);
+
+		tfmr =	  (( AT91_SSC_FSEDGE_POSITIVE	     ) & AT91_SSC_FSEDGE)
+			| (( 0				<< 23) & AT91_SSC_FSDEN)
+			| (( AT91_SSC_FSOS_NEGATIVE	     ) & AT91_SSC_FSOS)
+			| (((bits - 1)			<< 16) & AT91_SSC_FSLEN)
+			| (((channels - 1)		<<  8) & AT91_SSC_DATNB)
+			| (( 1				<<  7) & AT91_SSC_MSBF)
+			| (( 0				<<  5) & AT91_SSC_DATDEF)
+			| (((bits - 1)			<<  0) & AT91_SSC_DATALEN);
+		break;
+
+	case SND_SOC_DAIFMT_CBM_CFM:
+
+		/*
+		 * CODEC supplies BCLK and LRC clocks.
+		 *
+		 * The SSC transmit clock is obtained from the BCLK signal on
+		 * on the TK line, and the SSC receive clock is generated from the
+		 * transmit clock.
+		 *
+		 * For single channel data, one sample is transferred on the falling
+		 * edge of the LRC clock.  For two channel data, one sample is
+		 * transferred on both edges of the LRC clock.
+		 */
+		start_event = channels == 1
+				? AT91_SSC_START_FALLING_RF
+				: AT91_SSC_START_EDGE_RF;
+
+		rcmr =	  (( 0				<< 24) & AT91_SSC_PERIOD)
+			| (( 1				<< 16) & AT91_SSC_STTDLY)
+			| (( start_event		     ) & AT91_SSC_START)
+			| (( AT91_SSC_CK_RISING		     ) & AT91_SSC_CKI)
+			| (( AT91_SSC_CKO_NONE		     ) & AT91_SSC_CKO)
+			| (( AT91_SSC_CKS_CLOCK		     ) & AT91_SSC_CKS);
+
+		rfmr =	  (( AT91_SSC_FSEDGE_POSITIVE	     ) & AT91_SSC_FSEDGE)
+			| (( AT91_SSC_FSOS_NONE		     ) & AT91_SSC_FSOS)
+			| (( 0				<< 16) & AT91_SSC_FSLEN)
+			| (( 0				<<  8) & AT91_SSC_DATNB)
+			| (( 1				<<  7) & AT91_SSC_MSBF)
+			| (( 0				<<  5) & AT91_SSC_LOOP)
+			| (((bits - 1)			<<  0) & AT91_SSC_DATALEN);
+
+		tcmr =	  (( 0				<< 24) & AT91_SSC_PERIOD)
+			| (( 1				<< 16) & AT91_SSC_STTDLY)
+			| (( start_event		     ) & AT91_SSC_START)
+			| (( AT91_SSC_CKI_FALLING	     ) & AT91_SSC_CKI)
+			| (( AT91_SSC_CKO_NONE		     ) & AT91_SSC_CKO)
+			| (( AT91_SSC_CKS_PIN		     ) & AT91_SSC_CKS);
+
+		tfmr =	  (( AT91_SSC_FSEDGE_POSITIVE	     ) & AT91_SSC_FSEDGE)
+			| (( 0				<< 23) & AT91_SSC_FSDEN)
+			| (( AT91_SSC_FSOS_NONE		     ) & AT91_SSC_FSOS)
+			| (( 0				<< 16) & AT91_SSC_FSLEN)
+			| (( 0				<<  8) & AT91_SSC_DATNB)
+			| (( 1				<<  7) & AT91_SSC_MSBF)
+			| (( 0				<<  5) & AT91_SSC_DATDEF)
+			| (((bits - 1)			<<  0) & AT91_SSC_DATALEN);
+		break;
+
+	case SND_SOC_DAIFMT_CBS_CFM:
+	case SND_SOC_DAIFMT_CBM_CFS:
+	default:
+		printk(KERN_WARNING "at91-i2s: unsupported DAI format 0x%x.\n",
+			ssc_p->daifmt);
+		return -EINVAL;
+		break;
+	}
+	DBG("RCMR=%08x RFMR=%08x TCMR=%08x TFMR=%08x\n", rcmr, rfmr, tcmr, tfmr);
+
+	if (!ssc_p->initialized) {
+
+		/* Enable PMC peripheral clock for this SSC */
+		DBG("Starting pid %d clock\n", ssc_p->ssc.pid);
+		at91_sys_write(AT91_PMC_PCER, 1<<ssc_p->ssc.pid);
+
+		/* Reset the SSC and its PDC registers */
+		at91_ssc_write(ssc_p->ssc.base + AT91_SSC_CR, AT91_SSC_SWRST);
+
+		at91_ssc_write(ssc_p->ssc.base + AT91_PDC_RPR, 0);
+		at91_ssc_write(ssc_p->ssc.base + AT91_PDC_RCR, 0);
+		at91_ssc_write(ssc_p->ssc.base + AT91_PDC_RNPR, 0);
+		at91_ssc_write(ssc_p->ssc.base + AT91_PDC_RNCR, 0);
+		at91_ssc_write(ssc_p->ssc.base + AT91_PDC_TPR, 0);
+		at91_ssc_write(ssc_p->ssc.base + AT91_PDC_TCR, 0);
+		at91_ssc_write(ssc_p->ssc.base + AT91_PDC_TNPR, 0);
+		at91_ssc_write(ssc_p->ssc.base + AT91_PDC_TNCR, 0);
+
+		if ((ret = request_irq(ssc_p->ssc.pid, at91_i2s_interrupt,
+					0, ssc_p->name, ssc_p)) < 0) {
+			printk(KERN_WARNING "at91-i2s: request_irq failure\n");
+
+			DBG("Stopping pid %d clock\n", ssc_p->ssc.pid);
+			at91_sys_write(AT91_PMC_PCER, 1<<ssc_p->ssc.pid);
+			return ret;
+		}
+
+		ssc_p->initialized = 1;
+	}
+
+	/* set SSC clock mode register */
+	at91_ssc_write(ssc_p->ssc.base + AT91_SSC_CMR, ssc_p->cmr_div);
+
+	/* set receive clock mode and format */
+	at91_ssc_write(ssc_p->ssc.base + AT91_SSC_RCMR, rcmr);
+	at91_ssc_write(ssc_p->ssc.base + AT91_SSC_RFMR, rfmr);
+
+	/* set transmit clock mode and format */
+	at91_ssc_write(ssc_p->ssc.base + AT91_SSC_TCMR, tcmr);
+	at91_ssc_write(ssc_p->ssc.base + AT91_SSC_TFMR, tfmr);
+
+	DBG("hw_params: SSC initialized\n");
+	return 0;
+}
+
+
+static int at91_i2s_prepare(struct snd_pcm_substream *substream)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct at91_ssc_info *ssc_p = &ssc_info[rtd->dai->cpu_dai->id];
+	struct at91_pcm_dma_params *dma_params;
+	int dir;
+
+	dir = substream->stream == SNDRV_PCM_STREAM_PLAYBACK ? 0 : 1;
+	dma_params = ssc_p->dma_params[dir];
+
+	at91_ssc_write(dma_params->ssc_base + AT91_SSC_CR,
+			dma_params->mask->ssc_enable);
+
+	DBG("%s enabled SSC_SR=0x%08lx\n", dir ? "receive" : "transmit",
+		at91_ssc_read(dma_params->ssc_base + AT91_SSC_SR));
+	return 0;
+}
+
+
+#ifdef CONFIG_PM
+static int at91_i2s_suspend(struct platform_device *pdev,
+	struct snd_soc_cpu_dai *cpu_dai)
+{
+	struct at91_ssc_info *ssc_p;
+
+	if(!cpu_dai->active)
+		return 0;
+
+	ssc_p = &ssc_info[cpu_dai->id];
+
+	/* Save the status register before disabling transmit and receive. */
+	ssc_p->ssc_state.ssc_sr = at91_ssc_read(ssc_p->ssc.base + AT91_SSC_SR);
+	at91_ssc_write(ssc_p->ssc.base + AT91_SSC_CR,
+			AT91_SSC_TXDIS | AT91_SSC_RXDIS);
+
+	/* Save the current interrupt mask, then disable unmasked interrupts. */
+	ssc_p->ssc_state.ssc_imr = at91_ssc_read(ssc_p->ssc.base + AT91_SSC_IMR);
+	at91_ssc_write(ssc_p->ssc.base + AT91_SSC_IDR, ssc_p->ssc_state.ssc_imr);
+
+	ssc_p->ssc_state.ssc_cmr  = at91_ssc_read(ssc_p->ssc.base + AT91_SSC_CMR);
+	ssc_p->ssc_state.ssc_rcmr = at91_ssc_read(ssc_p->ssc.base + AT91_SSC_RCMR);
+	ssc_p->ssc_state.ssc_rfmr = at91_ssc_read(ssc_p->ssc.base + AT91_SSC_RFMR);
+	ssc_p->ssc_state.ssc_tcmr = at91_ssc_read(ssc_p->ssc.base + AT91_SSC_TCMR);
+	ssc_p->ssc_state.ssc_tfmr = at91_ssc_read(ssc_p->ssc.base + AT91_SSC_TFMR);
+
+	return 0;
+}
+
+static int at91_i2s_resume(struct platform_device *pdev,
+	struct snd_soc_cpu_dai *cpu_dai)
+{
+	struct at91_ssc_info *ssc_p;
+
+	if(!cpu_dai->active)
+		return 0;
+
+	ssc_p = &ssc_info[cpu_dai->id];
+
+	at91_ssc_write(ssc_p->ssc.base + AT91_SSC_TFMR, ssc_p->ssc_state.ssc_tfmr);
+	at91_ssc_write(ssc_p->ssc.base + AT91_SSC_TCMR, ssc_p->ssc_state.ssc_tcmr);
+	at91_ssc_write(ssc_p->ssc.base + AT91_SSC_RFMR, ssc_p->ssc_state.ssc_rfmr);
+	at91_ssc_write(ssc_p->ssc.base + AT91_SSC_RCMR, ssc_p->ssc_state.ssc_rcmr);
+	at91_ssc_write(ssc_p->ssc.base + AT91_SSC_CMR,  ssc_p->ssc_state.ssc_cmr);
+
+	at91_ssc_write(ssc_p->ssc.base + AT91_SSC_IER,  ssc_p->ssc_state.ssc_imr);
+
+	at91_ssc_write(ssc_p->ssc.base + AT91_SSC_CR,
+		((ssc_p->ssc_state.ssc_sr & AT91_SSC_RXENA) ? AT91_SSC_RXEN : 0) |
+		((ssc_p->ssc_state.ssc_sr & AT91_SSC_TXENA) ? AT91_SSC_TXEN : 0));
+
+	return 0;
+}
+
+#else
+#define at91_i2s_suspend	NULL
+#define at91_i2s_resume		NULL
+#endif
+
+#define AT91_I2S_RATES (SNDRV_PCM_RATE_8000  | SNDRV_PCM_RATE_11025 |\
+			SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 |\
+			SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
+			SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |\
+			SNDRV_PCM_RATE_96000)
+
+struct snd_soc_cpu_dai at91_i2s_dai[NUM_SSC_DEVICES] = {
+	{	.name = "at91_ssc0/i2s",
+		.id = 0,
+		.type = SND_SOC_DAI_I2S,
+		.suspend = at91_i2s_suspend,
+		.resume = at91_i2s_resume,
+		.playback = {
+			.channels_min = 1,
+			.channels_max = 2,
+			.rates = AT91_I2S_RATES,
+			.formats = SNDRV_PCM_FMTBIT_S16_LE,},
+		.capture = {
+			.channels_min = 1,
+			.channels_max = 2,
+			.rates = AT91_I2S_RATES,
+			.formats = SNDRV_PCM_FMTBIT_S16_LE,},
+		.ops = {
+			.startup = at91_i2s_startup,
+			.shutdown = at91_i2s_shutdown,
+			.prepare = at91_i2s_prepare,
+			.hw_params = at91_i2s_hw_params,},
+		.dai_ops = {
+			.set_sysclk = at91_i2s_set_dai_sysclk,
+			.set_fmt = at91_i2s_set_dai_fmt,
+			.set_clkdiv = at91_i2s_set_dai_clkdiv,},
+		.private_data = &ssc_info[0].ssc,
+	},
+#if NUM_SSC_DEVICES == 3
+	{	.name = "at91_ssc1/i2s",
+		.id = 1,
+		.type = SND_SOC_DAI_I2S,
+		.suspend = at91_i2s_suspend,
+		.resume = at91_i2s_resume,
+		.playback = {
+			.channels_min = 1,
+			.channels_max = 2,
+			.rates = AT91_I2S_RATES,
+			.formats = SNDRV_PCM_FMTBIT_S16_LE,},
+		.capture = {
+			.channels_min = 1,
+			.channels_max = 2,
+			.rates = AT91_I2S_RATES,
+			.formats = SNDRV_PCM_FMTBIT_S16_LE,},
+		.ops = {
+			.startup = at91_i2s_startup,
+			.shutdown = at91_i2s_shutdown,
+			.prepare = at91_i2s_prepare,
+			.hw_params = at91_i2s_hw_params,},
+		.dai_ops = {
+			.set_sysclk = at91_i2s_set_dai_sysclk,
+			.set_fmt = at91_i2s_set_dai_fmt,
+			.set_clkdiv = at91_i2s_set_dai_clkdiv,},
+		.private_data = &ssc_info[1].ssc,
+	},
+	{	.name = "at91_ssc2/i2s",
+		.id = 2,
+		.type = SND_SOC_DAI_I2S,
+		.suspend = at91_i2s_suspend,
+		.resume = at91_i2s_resume,
+		.playback = {
+			.channels_min = 1,
+			.channels_max = 2,
+			.rates = AT91_I2S_RATES,
+			.formats = SNDRV_PCM_FMTBIT_S16_LE,},
+		.capture = {
+			.channels_min = 1,
+			.channels_max = 2,
+			.rates = AT91_I2S_RATES,
+			.formats = SNDRV_PCM_FMTBIT_S16_LE,},
+		.ops = {
+			.startup = at91_i2s_startup,
+			.shutdown = at91_i2s_shutdown,
+			.prepare = at91_i2s_prepare,
+			.hw_params = at91_i2s_hw_params,},
+		.dai_ops = {
+			.set_sysclk = at91_i2s_set_dai_sysclk,
+			.set_fmt = at91_i2s_set_dai_fmt,
+			.set_clkdiv = at91_i2s_set_dai_clkdiv,},
+		.private_data = &ssc_info[2].ssc,
+	},
+#endif
+};
+
+EXPORT_SYMBOL_GPL(at91_i2s_dai);
+
+/* Module information */
+MODULE_AUTHOR("Frank Mandarino, fmandarino@endrelia.com, www.endrelia.com");
+MODULE_DESCRIPTION("AT91 I2S ASoC Interface");
+MODULE_LICENSE("GPL");
diff --git a/sound/soc/at91/at91-i2s.h b/sound/soc/at91/at91-i2s.h
new file mode 100644
index 00000000000..f8a875ba0cc
--- /dev/null
+++ b/sound/soc/at91/at91-i2s.h
@@ -0,0 +1,27 @@
+/*
+ * at91-i2s.h - ALSA I2S interface for the Atmel AT91 SoC
+ *
+ * Author:	Frank Mandarino <fmandarino@endrelia.com>
+ *		Endrelia Technologies Inc.
+ * Created:	Jan 9, 2007
+ *
+ * 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.
+ */
+
+#ifndef _AT91_I2S_H
+#define _AT91_I2S_H
+
+/* I2S system clock ids */
+#define AT91_SYSCLK_MCK		0 /* SSC uses AT91 MCK as system clock */
+
+/* I2S divider ids */
+#define AT91SSC_CMR_DIV		0 /* MCK divider for BCLK */
+#define AT91SSC_TCMR_PERIOD	1 /* BCLK divider for transmit FS */
+#define AT91SSC_RCMR_PERIOD	2 /* BCLK divider for receive FS */
+
+extern struct snd_soc_cpu_dai at91_i2s_dai[];
+
+#endif /* _AT91_I2S_H */
+
diff --git a/sound/soc/at91/at91-pcm.c b/sound/soc/at91/at91-pcm.c
new file mode 100644
index 00000000000..e88b12e7cc4
--- /dev/null
+++ b/sound/soc/at91/at91-pcm.c
@@ -0,0 +1,432 @@
+/*
+ * at91-pcm.c -- ALSA PCM interface for the Atmel AT91 SoC
+ *
+ * Author:	Frank Mandarino <fmandarino@endrelia.com>
+ *		Endrelia Technologies Inc.
+ * Created:	Mar 3, 2006
+ *
+ * Based on pxa2xx-pcm.c by:
+ *
+ * Author:	Nicolas Pitre
+ * Created:	Nov 30, 2004
+ * Copyright:	(C) 2004 MontaVista Software, Inc.
+ *
+ * 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.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+#include <linux/dma-mapping.h>
+
+#include <sound/driver.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+
+#include <asm/arch/hardware.h>
+#include <asm/arch/at91_ssc.h>
+#include <asm/arch/at91_pdc.h>
+
+#include "at91-pcm.h"
+
+#if 0
+#define	DBG(x...)	printk(KERN_INFO "at91-pcm: " x)
+#else
+#define	DBG(x...)
+#endif
+
+static const struct snd_pcm_hardware at91_pcm_hardware = {
+	.info			= SNDRV_PCM_INFO_MMAP |
+				  SNDRV_PCM_INFO_MMAP_VALID |
+				  SNDRV_PCM_INFO_INTERLEAVED |
+				  SNDRV_PCM_INFO_PAUSE,
+	.formats		= SNDRV_PCM_FMTBIT_S16_LE,
+	.period_bytes_min	= 32,
+	.period_bytes_max	= 8192,
+	.periods_min		= 2,
+	.periods_max		= 1024,
+	.buffer_bytes_max	= 32 * 1024,
+};
+
+struct at91_runtime_data {
+	struct at91_pcm_dma_params *params;
+	dma_addr_t dma_buffer;			/* physical address of dma buffer */
+	dma_addr_t dma_buffer_end;		/* first address beyond DMA buffer */
+	size_t period_size;
+	dma_addr_t period_ptr;			/* physical address of next period */
+	u32 pdc_xpr_save;			/* PDC register save */
+	u32 pdc_xcr_save;
+	u32 pdc_xnpr_save;
+	u32 pdc_xncr_save;
+};
+
+static void at91_pcm_dma_irq(u32 ssc_sr,
+	struct snd_pcm_substream *substream)
+{
+	struct at91_runtime_data *prtd = substream->runtime->private_data;
+	struct at91_pcm_dma_params *params = prtd->params;
+	static int count = 0;
+
+	count++;
+
+	if (ssc_sr & params->mask->ssc_endbuf) {
+
+		printk(KERN_WARNING
+			"at91-pcm: buffer %s on %s (SSC_SR=%#x, count=%d)\n",
+			substream->stream == SNDRV_PCM_STREAM_PLAYBACK
+				? "underrun" : "overrun",
+			params->name, ssc_sr, count);
+
+		/* re-start the PDC */
+		at91_ssc_write(params->ssc_base + AT91_PDC_PTCR, params->mask->pdc_disable);
+
+		prtd->period_ptr += prtd->period_size;
+		if (prtd->period_ptr >= prtd->dma_buffer_end) {
+			prtd->period_ptr = prtd->dma_buffer;
+		}
+
+		at91_ssc_write(params->ssc_base + params->pdc->xpr, prtd->period_ptr);
+		at91_ssc_write(params->ssc_base + params->pdc->xcr,
+				prtd->period_size / params->pdc_xfer_size);
+
+		at91_ssc_write(params->ssc_base + AT91_PDC_PTCR, params->mask->pdc_enable);
+	}
+
+	if (ssc_sr & params->mask->ssc_endx) {
+
+		/* Load the PDC next pointer and counter registers */
+		prtd->period_ptr += prtd->period_size;
+		if (prtd->period_ptr >= prtd->dma_buffer_end) {
+			prtd->period_ptr = prtd->dma_buffer;
+		}
+		at91_ssc_write(params->ssc_base + params->pdc->xnpr, prtd->period_ptr);
+		at91_ssc_write(params->ssc_base + params->pdc->xncr,
+				prtd->period_size / params->pdc_xfer_size);
+	}
+
+	snd_pcm_period_elapsed(substream);
+}
+
+static int at91_pcm_hw_params(struct snd_pcm_substream *substream,
+	struct snd_pcm_hw_params *params)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct at91_runtime_data *prtd = runtime->private_data;
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+
+	/* this may get called several times by oss emulation
+	 * with different params */
+
+	snd_pcm_set_runtime_buffer(substream, &substream->dma_buffer);
+	runtime->dma_bytes = params_buffer_bytes(params);
+
+	prtd->params = rtd->dai->cpu_dai->dma_data;
+	prtd->params->dma_intr_handler = at91_pcm_dma_irq;
+
+	prtd->dma_buffer = runtime->dma_addr;
+	prtd->dma_buffer_end = runtime->dma_addr + runtime->dma_bytes;
+	prtd->period_size = params_period_bytes(params);
+
+	DBG("hw_params: DMA for %s initialized (dma_bytes=%d, period_size=%d)\n",
+		prtd->params->name, runtime->dma_bytes, prtd->period_size);
+	return 0;
+}
+
+static int at91_pcm_hw_free(struct snd_pcm_substream *substream)
+{
+	struct at91_runtime_data *prtd = substream->runtime->private_data;
+	struct at91_pcm_dma_params *params = prtd->params;
+
+	if (params != NULL) {
+		at91_ssc_write(params->ssc_base + AT91_PDC_PTCR, params->mask->pdc_disable);
+		prtd->params->dma_intr_handler = NULL;
+	}
+
+	return 0;
+}
+
+static int at91_pcm_prepare(struct snd_pcm_substream *substream)
+{
+	struct at91_runtime_data *prtd = substream->runtime->private_data;
+	struct at91_pcm_dma_params *params = prtd->params;
+
+	at91_ssc_write(params->ssc_base + AT91_SSC_IDR,
+			params->mask->ssc_endx | params->mask->ssc_endbuf);
+
+	at91_ssc_write(params->ssc_base + AT91_PDC_PTCR, params->mask->pdc_disable);
+	return 0;
+}
+
+static int at91_pcm_trigger(struct snd_pcm_substream *substream,
+	int cmd)
+{
+	struct at91_runtime_data *prtd = substream->runtime->private_data;
+	struct at91_pcm_dma_params *params = prtd->params;
+	int ret = 0;
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+		prtd->period_ptr = prtd->dma_buffer;
+
+		at91_ssc_write(params->ssc_base + params->pdc->xpr, prtd->period_ptr);
+		at91_ssc_write(params->ssc_base + params->pdc->xcr,
+				prtd->period_size / params->pdc_xfer_size);
+
+		prtd->period_ptr += prtd->period_size;
+		at91_ssc_write(params->ssc_base + params->pdc->xnpr, prtd->period_ptr);
+		at91_ssc_write(params->ssc_base + params->pdc->xncr,
+				prtd->period_size / params->pdc_xfer_size);
+
+		DBG("trigger: period_ptr=%lx, xpr=%lx, xcr=%ld, xnpr=%lx, xncr=%ld\n",
+			(unsigned long) prtd->period_ptr,
+			at91_ssc_read(params->ssc_base + params->pdc->xpr),
+			at91_ssc_read(params->ssc_base + params->pdc->xcr),
+			at91_ssc_read(params->ssc_base + params->pdc->xnpr),
+			at91_ssc_read(params->ssc_base + params->pdc->xncr));
+
+		at91_ssc_write(params->ssc_base + AT91_SSC_IER,
+			params->mask->ssc_endx | params->mask->ssc_endbuf);
+
+		at91_ssc_write(params->ssc_base + AT91_PDC_PTCR, params->mask->pdc_enable);
+
+		DBG("sr=%lx imr=%lx\n", at91_ssc_read(params->ssc_base + AT91_SSC_SR),
+					at91_ssc_read(params->ssc_base + AT91_SSC_IER));
+		break;
+
+	case SNDRV_PCM_TRIGGER_STOP:
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+		at91_ssc_write(params->ssc_base + AT91_PDC_PTCR, params->mask->pdc_disable);
+		break;
+
+	case SNDRV_PCM_TRIGGER_RESUME:
+	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+		at91_ssc_write(params->ssc_base + AT91_PDC_PTCR, params->mask->pdc_enable);
+		break;
+
+	default:
+		ret = -EINVAL;
+	}
+
+	return ret;
+}
+
+static snd_pcm_uframes_t at91_pcm_pointer(
+	struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct at91_runtime_data *prtd = runtime->private_data;
+	struct at91_pcm_dma_params *params = prtd->params;
+	dma_addr_t ptr;
+	snd_pcm_uframes_t x;
+
+	ptr = (dma_addr_t) at91_ssc_read(params->ssc_base + params->pdc->xpr);
+	x = bytes_to_frames(runtime, ptr - prtd->dma_buffer);
+
+	if (x == runtime->buffer_size)
+		x = 0;
+	return x;
+}
+
+static int at91_pcm_open(struct snd_pcm_substream *substream)
+{
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	struct at91_runtime_data *prtd;
+	int ret = 0;
+