Add the rt linux 4.1.3-rt3 as base

Import the rt linux 4.1.3-rt3 as OPNFV kvm base.

It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:

commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date:   Sat Jul 25 12:13:34 2015 +0200

    Prepare v4.1.3-rt3

    Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>

We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.

Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>

1 files changed, 1120 insertions, 0 deletions

diff --git a/kernel/sound/spi/at73c213.c b/kernel/sound/spi/at73c213.c
new file mode 100644
index 000000000..395223678
--- /dev/null
+++ b/kernel/sound/spi/at73c213.c
@@ -0,0 +1,1120 @@
+/*
+ * Driver for AT73C213 16-bit stereo DAC connected to Atmel SSC
+ *
+ * Copyright (C) 2006-2007 Atmel Norway
+ *
+ * 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.
+ */
+
+/*#define DEBUG*/
+
+#include <linux/clk.h>
+#include <linux/err.h>
+#include <linux/delay.h>
+#include <linux/device.h>
+#include <linux/dma-mapping.h>
+#include <linux/init.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/mutex.h>
+#include <linux/platform_device.h>
+#include <linux/io.h>
+
+#include <sound/initval.h>
+#include <sound/control.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+
+#include <linux/atmel-ssc.h>
+
+#include <linux/spi/spi.h>
+#include <linux/spi/at73c213.h>
+
+#include "at73c213.h"
+
+#define BITRATE_MIN	 8000 /* Hardware limit? */
+#define BITRATE_TARGET	CONFIG_SND_AT73C213_TARGET_BITRATE
+#define BITRATE_MAX	50000 /* Hardware limit. */
+
+/* Initial (hardware reset) AT73C213 register values. */
+static u8 snd_at73c213_original_image[18] =
+{
+	0x00,	/* 00 - CTRL    */
+	0x05,	/* 01 - LLIG    */
+	0x05,	/* 02 - RLIG    */
+	0x08,	/* 03 - LPMG    */
+	0x08,	/* 04 - RPMG    */
+	0x00,	/* 05 - LLOG    */
+	0x00,	/* 06 - RLOG    */
+	0x22,	/* 07 - OLC     */
+	0x09,	/* 08 - MC      */
+	0x00,	/* 09 - CSFC    */
+	0x00,	/* 0A - MISC    */
+	0x00,	/* 0B -         */
+	0x00,	/* 0C - PRECH   */
+	0x05,	/* 0D - AUXG    */
+	0x00,	/* 0E -         */
+	0x00,	/* 0F -         */
+	0x00,	/* 10 - RST     */
+	0x00,	/* 11 - PA_CTRL */
+};
+
+struct snd_at73c213 {
+	struct snd_card			*card;
+	struct snd_pcm			*pcm;
+	struct snd_pcm_substream	*substream;
+	struct at73c213_board_info	*board;
+	int				irq;
+	int				period;
+	unsigned long			bitrate;
+	struct ssc_device		*ssc;
+	struct spi_device		*spi;
+	u8				spi_wbuffer[2];
+	u8				spi_rbuffer[2];
+	/* Image of the SPI registers in AT73C213. */
+	u8				reg_image[18];
+	/* Protect SSC registers against concurrent access. */
+	spinlock_t			lock;
+	/* Protect mixer registers against concurrent access. */
+	struct mutex			mixer_lock;
+};
+
+#define get_chip(card) ((struct snd_at73c213 *)card->private_data)
+
+static int
+snd_at73c213_write_reg(struct snd_at73c213 *chip, u8 reg, u8 val)
+{
+	struct spi_message msg;
+	struct spi_transfer msg_xfer = {
+		.len		= 2,
+		.cs_change	= 0,
+	};
+	int retval;
+
+	spi_message_init(&msg);
+
+	chip->spi_wbuffer[0] = reg;
+	chip->spi_wbuffer[1] = val;
+
+	msg_xfer.tx_buf = chip->spi_wbuffer;
+	msg_xfer.rx_buf = chip->spi_rbuffer;
+	spi_message_add_tail(&msg_xfer, &msg);
+
+	retval = spi_sync(chip->spi, &msg);
+
+	if (!retval)
+		chip->reg_image[reg] = val;
+
+	return retval;
+}
+
+static struct snd_pcm_hardware snd_at73c213_playback_hw = {
+	.info		= SNDRV_PCM_INFO_INTERLEAVED |
+			  SNDRV_PCM_INFO_BLOCK_TRANSFER,
+	.formats	= SNDRV_PCM_FMTBIT_S16_BE,
+	.rates		= SNDRV_PCM_RATE_CONTINUOUS,
+	.rate_min	= 8000,  /* Replaced by chip->bitrate later. */
+	.rate_max	= 50000, /* Replaced by chip->bitrate later. */
+	.channels_min	= 1,
+	.channels_max	= 2,
+	.buffer_bytes_max = 64 * 1024 - 1,
+	.period_bytes_min = 512,
+	.period_bytes_max = 64 * 1024 - 1,
+	.periods_min	= 4,
+	.periods_max	= 1024,
+};
+
+/*
+ * Calculate and set bitrate and divisions.
+ */
+static int snd_at73c213_set_bitrate(struct snd_at73c213 *chip)
+{
+	unsigned long ssc_rate = clk_get_rate(chip->ssc->clk);
+	unsigned long dac_rate_new, ssc_div;
+	int status;
+	unsigned long ssc_div_max, ssc_div_min;
+	int max_tries;
+
+	/*
+	 * We connect two clocks here, picking divisors so the I2S clocks
+	 * out data at the same rate the DAC clocks it in ... and as close
+	 * as practical to the desired target rate.
+	 *
+	 * The DAC master clock (MCLK) is programmable, and is either 256
+	 * or (not here) 384 times the I2S output clock (BCLK).
+	 */
+
+	/* SSC clock / (bitrate * stereo * 16-bit). */
+	ssc_div = ssc_rate / (BITRATE_TARGET * 2 * 16);
+	ssc_div_min = ssc_rate / (BITRATE_MAX * 2 * 16);
+	ssc_div_max = ssc_rate / (BITRATE_MIN * 2 * 16);
+	max_tries = (ssc_div_max - ssc_div_min) / 2;
+
+	if (max_tries < 1)
+		max_tries = 1;
+
+	/* ssc_div must be even. */
+	ssc_div = (ssc_div + 1) & ~1UL;
+
+	if ((ssc_rate / (ssc_div * 2 * 16)) < BITRATE_MIN) {
+		ssc_div -= 2;
+		if ((ssc_rate / (ssc_div * 2 * 16)) > BITRATE_MAX)
+			return -ENXIO;
+	}
+
+	/* Search for a possible bitrate. */
+	do {
+		/* SSC clock / (ssc divider * 16-bit * stereo). */
+		if ((ssc_rate / (ssc_div * 2 * 16)) < BITRATE_MIN)
+			return -ENXIO;
+
+		/* 256 / (2 * 16) = 8 */
+		dac_rate_new = 8 * (ssc_rate / ssc_div);
+
+		status = clk_round_rate(chip->board->dac_clk, dac_rate_new);
+		if (status <= 0)
+			return status;
+
+		/* Ignore difference smaller than 256 Hz. */
+		if ((status/256) == (dac_rate_new/256))
+			goto set_rate;
+
+		ssc_div += 2;
+	} while (--max_tries);
+
+	/* Not able to find a valid bitrate. */
+	return -ENXIO;
+
+set_rate:
+	status = clk_set_rate(chip->board->dac_clk, status);
+	if (status < 0)
+		return status;
+
+	/* Set divider in SSC device. */
+	ssc_writel(chip->ssc->regs, CMR, ssc_div/2);
+
+	/* SSC clock / (ssc divider * 16-bit * stereo). */
+	chip->bitrate = ssc_rate / (ssc_div * 16 * 2);
+
+	dev_info(&chip->spi->dev,
+			"at73c213: supported bitrate is %lu (%lu divider)\n",
+			chip->bitrate, ssc_div);
+
+	return 0;
+}
+
+static int snd_at73c213_pcm_open(struct snd_pcm_substream *substream)
+{
+	struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	int err;
+
+	/* ensure buffer_size is a multiple of period_size */
+	err = snd_pcm_hw_constraint_integer(runtime,
+					SNDRV_PCM_HW_PARAM_PERIODS);
+	if (err < 0)
+		return err;
+	snd_at73c213_playback_hw.rate_min = chip->bitrate;
+	snd_at73c213_playback_hw.rate_max = chip->bitrate;
+	runtime->hw = snd_at73c213_playback_hw;
+	chip->substream = substream;
+
+	return 0;
+}
+
+static int snd_at73c213_pcm_close(struct snd_pcm_substream *substream)
+{
+	struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
+	chip->substream = NULL;
+	return 0;
+}
+
+static int snd_at73c213_pcm_hw_params(struct snd_pcm_substream *substream,
+				 struct snd_pcm_hw_params *hw_params)
+{
+	struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
+	int channels = params_channels(hw_params);
+	int val;
+
+	val = ssc_readl(chip->ssc->regs, TFMR);
+	val = SSC_BFINS(TFMR_DATNB, channels - 1, val);
+	ssc_writel(chip->ssc->regs, TFMR, val);
+
+	return snd_pcm_lib_malloc_pages(substream,
+					params_buffer_bytes(hw_params));
+}
+
+static int snd_at73c213_pcm_hw_free(struct snd_pcm_substream *substream)
+{
+	return snd_pcm_lib_free_pages(substream);
+}
+
+static int snd_at73c213_pcm_prepare(struct snd_pcm_substream *substream)
+{
+	struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	int block_size;
+
+	block_size = frames_to_bytes(runtime, runtime->period_size);
+
+	chip->period = 0;
+
+	ssc_writel(chip->ssc->regs, PDC_TPR,
+			(long)runtime->dma_addr);
+	ssc_writel(chip->ssc->regs, PDC_TCR,
+			runtime->period_size * runtime->channels);
+	ssc_writel(chip->ssc->regs, PDC_TNPR,
+			(long)runtime->dma_addr + block_size);
+	ssc_writel(chip->ssc->regs, PDC_TNCR,
+			runtime->period_size * runtime->channels);
+
+	return 0;
+}
+
+static int snd_at73c213_pcm_trigger(struct snd_pcm_substream *substream,
+				   int cmd)
+{
+	struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
+	int retval = 0;
+
+	spin_lock(&chip->lock);
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+		ssc_writel(chip->ssc->regs, IER, SSC_BIT(IER_ENDTX));
+		ssc_writel(chip->ssc->regs, PDC_PTCR, SSC_BIT(PDC_PTCR_TXTEN));
+		break;
+	case SNDRV_PCM_TRIGGER_STOP:
+		ssc_writel(chip->ssc->regs, PDC_PTCR, SSC_BIT(PDC_PTCR_TXTDIS));
+		ssc_writel(chip->ssc->regs, IDR, SSC_BIT(IDR_ENDTX));
+		break;
+	default:
+		dev_dbg(&chip->spi->dev, "spurious command %x\n", cmd);
+		retval = -EINVAL;
+		break;
+	}
+
+	spin_unlock(&chip->lock);
+
+	return retval;
+}
+
+static snd_pcm_uframes_t
+snd_at73c213_pcm_pointer(struct snd_pcm_substream *substream)
+{
+	struct snd_at73c213 *chip = snd_pcm_substream_chip(substream);
+	struct snd_pcm_runtime *runtime = substream->runtime;
+	snd_pcm_uframes_t pos;
+	unsigned long bytes;
+
+	bytes = ssc_readl(chip->ssc->regs, PDC_TPR)
+		- (unsigned long)runtime->dma_addr;
+
+	pos = bytes_to_frames(runtime, bytes);
+	if (pos >= runtime->buffer_size)
+		pos -= runtime->buffer_size;
+
+	return pos;
+}
+
+static struct snd_pcm_ops at73c213_playback_ops = {
+	.open		= snd_at73c213_pcm_open,
+	.close		= snd_at73c213_pcm_close,
+	.ioctl		= snd_pcm_lib_ioctl,
+	.hw_params	= snd_at73c213_pcm_hw_params,
+	.hw_free	= snd_at73c213_pcm_hw_free,
+	.prepare	= snd_at73c213_pcm_prepare,
+	.trigger	= snd_at73c213_pcm_trigger,
+	.pointer	= snd_at73c213_pcm_pointer,
+};
+
+static int snd_at73c213_pcm_new(struct snd_at73c213 *chip, int device)
+{
+	struct snd_pcm *pcm;
+	int retval;
+
+	retval = snd_pcm_new(chip->card, chip->card->shortname,
+			device, 1, 0, &pcm);
+	if (retval < 0)
+		goto out;
+
+	pcm->private_data = chip;
+	pcm->info_flags = SNDRV_PCM_INFO_BLOCK_TRANSFER;
+	strcpy(pcm->name, "at73c213");
+	chip->pcm = pcm;
+
+	snd_pcm_set_ops(pcm, SNDRV_PCM_STREAM_PLAYBACK, &at73c213_playback_ops);
+
+	retval = snd_pcm_lib_preallocate_pages_for_all(chip->pcm,
+			SNDRV_DMA_TYPE_DEV, &chip->ssc->pdev->dev,
+			64 * 1024, 64 * 1024);
+out:
+	return retval;
+}
+
+static irqreturn_t snd_at73c213_interrupt(int irq, void *dev_id)
+{
+	struct snd_at73c213 *chip = dev_id;
+	struct snd_pcm_runtime *runtime = chip->substream->runtime;
+	u32 status;
+	int offset;
+	int block_size;
+	int next_period;
+	int retval = IRQ_NONE;
+
+	spin_lock(&chip->lock);
+
+	block_size = frames_to_bytes(runtime, runtime->period_size);
+	status = ssc_readl(chip->ssc->regs, IMR);
+
+	if (status & SSC_BIT(IMR_ENDTX)) {
+		chip->period++;
+		if (chip->period == runtime->periods)
+			chip->period = 0;
+		next_period = chip->period + 1;
+		if (next_period == runtime->periods)
+			next_period = 0;
+
+		offset = block_size * next_period;
+
+		ssc_writel(chip->ssc->regs, PDC_TNPR,
+				(long)runtime->dma_addr + offset);
+		ssc_writel(chip->ssc->regs, PDC_TNCR,
+				runtime->period_size * runtime->channels);
+		retval = IRQ_HANDLED;
+	}
+
+	ssc_readl(chip->ssc->regs, IMR);
+	spin_unlock(&chip->lock);
+
+	if (status & SSC_BIT(IMR_ENDTX))
+		snd_pcm_period_elapsed(chip->substream);
+
+	return retval;
+}
+
+/*
+ * Mixer functions.
+ */
+static int snd_at73c213_mono_get(struct snd_kcontrol *kcontrol,
+				 struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
+	int reg = kcontrol->private_value & 0xff;
+	int shift = (kcontrol->private_value >> 8) & 0xff;
+	int mask = (kcontrol->private_value >> 16) & 0xff;
+	int invert = (kcontrol->private_value >> 24) & 0xff;
+
+	mutex_lock(&chip->mixer_lock);
+
+	ucontrol->value.integer.value[0] =
+		(chip->reg_image[reg] >> shift) & mask;
+
+	if (invert)
+		ucontrol->value.integer.value[0] =
+			mask - ucontrol->value.integer.value[0];
+
+	mutex_unlock(&chip->mixer_lock);
+
+	return 0;
+}
+
+static int snd_at73c213_mono_put(struct snd_kcontrol *kcontrol,
+				 struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
+	int reg = kcontrol->private_value & 0xff;
+	int shift = (kcontrol->private_value >> 8) & 0xff;
+	int mask = (kcontrol->private_value >> 16) & 0xff;
+	int invert = (kcontrol->private_value >> 24) & 0xff;
+	int change, retval;
+	unsigned short val;
+
+	val = (ucontrol->value.integer.value[0] & mask);
+	if (invert)
+		val = mask - val;
+	val <<= shift;
+
+	mutex_lock(&chip->mixer_lock);
+
+	val = (chip->reg_image[reg] & ~(mask << shift)) | val;
+	change = val != chip->reg_image[reg];
+	retval = snd_at73c213_write_reg(chip, reg, val);
+
+	mutex_unlock(&chip->mixer_lock);
+
+	if (retval)
+		return retval;
+
+	return change;
+}
+
+static int snd_at73c213_stereo_info(struct snd_kcontrol *kcontrol,
+				  struct snd_ctl_elem_info *uinfo)
+{
+	int mask = (kcontrol->private_value >> 24) & 0xff;
+
+	if (mask == 1)
+		uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
+	else
+		uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+
+	uinfo->count = 2;
+	uinfo->value.integer.min = 0;
+	uinfo->value.integer.max = mask;
+
+	return 0;
+}
+
+static int snd_at73c213_stereo_get(struct snd_kcontrol *kcontrol,
+				 struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
+	int left_reg = kcontrol->private_value & 0xff;
+	int right_reg = (kcontrol->private_value >> 8) & 0xff;
+	int shift_left = (kcontrol->private_value >> 16) & 0x07;
+	int shift_right = (kcontrol->private_value >> 19) & 0x07;
+	int mask = (kcontrol->private_value >> 24) & 0xff;
+	int invert = (kcontrol->private_value >> 22) & 1;
+
+	mutex_lock(&chip->mixer_lock);
+
+	ucontrol->value.integer.value[0] =
+		(chip->reg_image[left_reg] >> shift_left) & mask;
+	ucontrol->value.integer.value[1] =
+		(chip->reg_image[right_reg] >> shift_right) & mask;
+
+	if (invert) {
+		ucontrol->value.integer.value[0] =
+			mask - ucontrol->value.integer.value[0];
+		ucontrol->value.integer.value[1] =
+			mask - ucontrol->value.integer.value[1];
+	}
+
+	mutex_unlock(&chip->mixer_lock);
+
+	return 0;
+}
+
+static int snd_at73c213_stereo_put(struct snd_kcontrol *kcontrol,
+				 struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
+	int left_reg = kcontrol->private_value & 0xff;
+	int right_reg = (kcontrol->private_value >> 8) & 0xff;
+	int shift_left = (kcontrol->private_value >> 16) & 0x07;
+	int shift_right = (kcontrol->private_value >> 19) & 0x07;
+	int mask = (kcontrol->private_value >> 24) & 0xff;
+	int invert = (kcontrol->private_value >> 22) & 1;
+	int change, retval;
+	unsigned short val1, val2;
+
+	val1 = ucontrol->value.integer.value[0] & mask;
+	val2 = ucontrol->value.integer.value[1] & mask;
+	if (invert) {
+		val1 = mask - val1;
+		val2 = mask - val2;
+	}
+	val1 <<= shift_left;
+	val2 <<= shift_right;
+
+	mutex_lock(&chip->mixer_lock);
+
+	val1 = (chip->reg_image[left_reg] & ~(mask << shift_left)) | val1;
+	val2 = (chip->reg_image[right_reg] & ~(mask << shift_right)) | val2;
+	change = val1 != chip->reg_image[left_reg]
+		|| val2 != chip->reg_image[right_reg];
+	retval = snd_at73c213_write_reg(chip, left_reg, val1);
+	if (retval) {
+		mutex_unlock(&chip->mixer_lock);
+		goto out;
+	}
+	retval = snd_at73c213_write_reg(chip, right_reg, val2);
+	if (retval) {
+		mutex_unlock(&chip->mixer_lock);
+		goto out;
+	}
+
+	mutex_unlock(&chip->mixer_lock);
+
+	return change;
+
+out:
+	return retval;
+}
+
+#define snd_at73c213_mono_switch_info	snd_ctl_boolean_mono_info
+
+static int snd_at73c213_mono_switch_get(struct snd_kcontrol *kcontrol,
+				 struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
+	int reg = kcontrol->private_value & 0xff;
+	int shift = (kcontrol->private_value >> 8) & 0xff;
+	int invert = (kcontrol->private_value >> 24) & 0xff;
+
+	mutex_lock(&chip->mixer_lock);
+
+	ucontrol->value.integer.value[0] =
+		(chip->reg_image[reg] >> shift) & 0x01;
+
+	if (invert)
+		ucontrol->value.integer.value[0] =
+			0x01 - ucontrol->value.integer.value[0];
+
+	mutex_unlock(&chip->mixer_lock);
+
+	return 0;
+}
+
+static int snd_at73c213_mono_switch_put(struct snd_kcontrol *kcontrol,
+				 struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_at73c213 *chip = snd_kcontrol_chip(kcontrol);
+	int reg = kcontrol->private_value & 0xff;
+	int shift = (kcontrol->private_value >> 8) & 0xff;
+	int mask = (kcontrol->private_value >> 16) & 0xff;
+	int invert = (kcontrol->private_value >> 24) & 0xff;
+	int change, retval;
+	unsigned short val;
+
+	if (ucontrol->value.integer.value[0])
+		val = mask;
+	else
+		val = 0;
+
+	if (invert)
+		val = mask - val;
+	val <<= shift;
+
+	mutex_lock(&chip->mixer_lock);
+
+	val |= (chip->reg_image[reg] & ~(mask << shift));
+	change = val != chip->reg_image[reg];
+
+	retval = snd_at73c213_write_reg(chip, reg, val);
+
+	mutex_unlock(&chip->mixer_lock);
+
+	if (retval)
+		return retval;
+
+	return change;
+}
+
+static int snd_at73c213_pa_volume_info(struct snd_kcontrol *kcontrol,
+				  struct snd_ctl_elem_info *uinfo)
+{
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+	uinfo->count = 1;
+	uinfo->value.integer.min = 0;
+	uinfo->value.integer.max = ((kcontrol->private_value >> 16) & 0xff) - 1;
+
+	return 0;
+}
+
+static int snd_at73c213_line_capture_volume_info(
+		struct snd_kcontrol *kcontrol,
+		struct snd_ctl_elem_info *uinfo)
+{
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+	uinfo->count = 2;
+	/* When inverted will give values 0x10001 => 0. */
+	uinfo->value.integer.min = 14;
+	uinfo->value.integer.max = 31;
+
+	return 0;
+}
+
+static int snd_at73c213_aux_capture_volume_info(
+		struct snd_kcontrol *kcontrol,
+		struct snd_ctl_elem_info *uinfo)
+{
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+	uinfo->count = 1;
+	/* When inverted will give values 0x10001 => 0. */
+	uinfo->value.integer.min = 14;
+	uinfo->value.integer.max = 31;
+
+	return 0;
+}
+
+#define AT73C213_MONO_SWITCH(xname, xindex, reg, shift, mask, invert)	\
+{									\
+	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,				\
+	.name = xname,							\
+	.index = xindex,						\
+	.info = snd_at73c213_mono_switch_info,				\
+	.get = snd_at73c213_mono_switch_get,				\
+	.put = snd_at73c213_mono_switch_put,				\
+	.private_value = (reg | (shift << 8) | (mask << 16) | (invert << 24)) \
+}
+
+#define AT73C213_STEREO(xname, xindex, left_reg, right_reg, shift_left, shift_right, mask, invert) \
+{									\
+	.iface = SNDRV_CTL_ELEM_IFACE_MIXER,				\
+	.name = xname,							\
+	.index = xindex,						\
+	.info = snd_at73c213_stereo_info,				\
+	.get = snd_at73c213_stereo_get,					\
+	.put = snd_at73c213_stereo_put,					\
+	.private_value = (left_reg | (right_reg << 8)			\
+			| (shift_left << 16) | (shift_right << 19)	\
+			| (mask << 24) | (invert << 22))		\
+}
+
+static struct snd_kcontrol_new snd_at73c213_controls[] = {
+AT73C213_STEREO("Master Playback Volume", 0, DAC_LMPG, DAC_RMPG, 0, 0, 0x1f, 1),
+AT73C213_STEREO("Master Playback Switch", 0, DAC_LMPG, DAC_RMPG, 5, 5, 1, 1),
+AT73C213_STEREO("PCM Playback Volume", 0, DAC_LLOG, DAC_RLOG, 0, 0, 0x1f, 1),
+AT73C213_STEREO("PCM Playback Switch", 0, DAC_LLOG, DAC_RLOG, 5, 5, 1, 1),
+AT73C213_MONO_SWITCH("Mono PA Playback Switch", 0, DAC_CTRL, DAC_CTRL_ONPADRV,
+		     0x01, 0),
+{
+	.iface	= SNDRV_CTL_ELEM_IFACE_MIXER,
+	.name	= "PA Playback Volume",
+	.index	= 0,
+	.info	= snd_at73c213_pa_volume_info,
+	.get	= snd_at73c213_mono_get,
+	.put	= snd_at73c213_mono_put,
+	.private_value	= PA_CTRL | (PA_CTRL_APAGAIN << 8) | \
+		(0x0f << 16) | (1 << 24),
+},
+AT73C213_MONO_SWITCH("PA High Gain Playback Switch", 0, PA_CTRL, PA_CTRL_APALP,
+		     0x01, 1),
+AT73C213_MONO_SWITCH("PA Playback Switch", 0, PA_CTRL, PA_CTRL_APAON, 0x01, 0),
+{
+	.iface	= SNDRV_CTL_ELEM_IFACE_MIXER,
+	.name	= "Aux Capture Volume",
+	.index	= 0,
+	.info	= snd_at73c213_aux_capture_volume_info,
+	.get	= snd_at73c213_mono_get,
+	.put	= snd_at73c213_mono_put,
+	.private_value	= DAC_AUXG | (0 << 8) | (0x1f << 16) | (1 << 24),
+},
+AT73C213_MONO_SWITCH("Aux Capture Switch", 0, DAC_CTRL, DAC_CTRL_ONAUXIN,
+		     0x01, 0),
+{
+	.iface	= SNDRV_CTL_ELEM_IFACE_MIXER,
+	.name	= "Line Capture Volume",
+	.index	= 0,
+	.info	= snd_at73c213_line_capture_volume_info,
+	.get	= snd_at73c213_stereo_get,
+	.put	= snd_at73c213_stereo_put,
+	.private_value	= DAC_LLIG | (DAC_RLIG << 8) | (0 << 16) | (0 << 19)
+		| (0x1f << 24) | (1 << 22),
+},
+AT73C213_MONO_SWITCH("Line Capture Switch", 0, DAC_CTRL, 0, 0x03, 0),
+};
+
+static int snd_at73c213_mixer(struct snd_at73c213 *chip)
+{
+	struct snd_card *card;
+	int errval, idx;
+
+	if (chip == NULL || chip->pcm == NULL)
+		return -EINVAL;
+
+	card = chip->card;
+
+	strcpy(card->mixername, chip->pcm->name);
+
+	for (idx = 0; idx < ARRAY_SIZE(snd_at73c213_controls); idx++) {
+		errval = snd_ctl_add(card,
+				snd_ctl_new1(&snd_at73c213_controls[idx],
+					chip));
+		if (errval < 0)
+			goto cleanup;
+	}
+
+	return 0;
+
+cleanup:
+	for (idx = 1; idx < ARRAY_SIZE(snd_at73c213_controls) + 1; idx++) {
+		struct snd_kcontrol *kctl;
+		kctl = snd_ctl_find_numid(card, idx);
+		if (kctl)
+			snd_ctl_remove(card, kctl);
+	}
+	return errval;
+}
+
+/*
+ * Device functions
+ */
+static int snd_at73c213_ssc_init(struct snd_at73c213 *chip)
+{
+	/*
+	 * Continuous clock output.
+	 * Starts on falling TF.
+	 * Delay 1 cycle (1 bit).
+	 * Periode is 16 bit (16 - 1).
+	 */
+	ssc_writel(chip->ssc->regs, TCMR,
+			SSC_BF(TCMR_CKO, 1)
+			| SSC_BF(TCMR_START, 4)
+			| SSC_BF(TCMR_STTDLY, 1)
+			| SSC_BF(TCMR_PERIOD, 16 - 1));
+	/*
+	 * Data length is 16 bit (16 - 1).
+	 * Transmit MSB first.
+	 * Transmit 2 words each transfer.
+	 * Frame sync length is 16 bit (16 - 1).
+	 * Frame starts on negative pulse.
+	 */
+	ssc_writel(chip->ssc->regs, TFMR,
+			SSC_BF(TFMR_DATLEN, 16 - 1)
+			| SSC_BIT(TFMR_MSBF)
+			| SSC_BF(TFMR_DATNB, 1)
+			| SSC_BF(TFMR_FSLEN, 16 - 1)
+			| SSC_BF(TFMR_FSOS, 1));
+
+	return 0;
+}
+
+static int snd_at73c213_chip_init(struct snd_at73c213 *chip)
+{
+	int retval;
+	unsigned char dac_ctrl = 0;
+
+	retval = snd_at73c213_set_bitrate(chip);
+	if (retval)
+		goto out;
+
+	/* Enable DAC master clock. */
+	clk_enable(chip->board->dac_clk);
+
+	/* Initialize at73c213 on SPI bus. */
+	retval = snd_at73c213_write_reg(chip, DAC_RST, 0x04);
+	if (retval)
+		goto out_clk;
+	msleep(1);
+	retval = snd_at73c213_write_reg(chip, DAC_RST, 0x03);
+	if (retval)
+		goto out_clk;
+
+	/* Precharge everything. */
+	retval = snd_at73c213_write_reg(chip, DAC_PRECH, 0xff);
+	if (retval)
+		goto out_clk;
+	retval = snd_at73c213_write_reg(chip, PA_CTRL, (1<<PA_CTRL_APAPRECH));
+	if (retval)
+		goto out_clk;
+	retval = snd_at73c213_write_reg(chip, DAC_CTRL,
+			(1<<DAC_CTRL_ONLNOL) | (1<<DAC_CTRL_ONLNOR));
+	if (retval)
+		goto out_clk;
+
+	msleep(50);
+
+	/* Stop precharging PA. */
+	retval = snd_at73c213_write_reg(chip, PA_CTRL,
+			(1<<PA_CTRL_APALP) | 0x0f);
+	if (retval)
+		goto out_clk;
+
+	msleep(450);
+
+	/* Stop precharging DAC, turn on master power. */
+	retval = snd_at73c213_write_reg(chip, DAC_PRECH, (1<<DAC_PRECH_ONMSTR));
+	if (retval)
+		goto out_clk;
+
+	msleep(1);
+
+	/* Turn on DAC. */
+	dac_ctrl = (1<<DAC_CTRL_ONDACL) | (1<<DAC_CTRL_ONDACR)
+		| (1<<DAC_CTRL_ONLNOL) | (1<<DAC_CTRL_ONLNOR);
+
+	retval = snd_at73c213_write_reg(chip, DAC_CTRL, dac_ctrl);
+	if (retval)
+		goto out_clk;
+
+	/* Mute sound. */
+	retval = snd_at73c213_write_reg(chip, DAC_LMPG, 0x3f);
+	if (retval)
+		goto out_clk;
+	retval = snd_at73c213_write_reg(chip, DAC_RMPG, 0x3f);
+	if (retval)
+		goto out_clk;
+	retval = snd_at73c213_write_reg(chip, DAC_LLOG, 0x3f);
+	if (retval)
+		goto out_clk;
+	retval = snd_at73c213_write_reg(chip, DAC_RLOG, 0x3f);
+	if (retval)
+		goto out_clk;
+	retval = snd_at73c213_write_reg(chip, DAC_LLIG, 0x11);
+	if (retval)
+		goto out_clk;
+	retval = snd_at73c213_write_reg(chip, DAC_RLIG, 0x11);
+	if (retval)
+		goto out_clk;
+	retval = snd_at73c213_write_reg(chip, DAC_AUXG, 0x11);
+	if (retval)
+		goto out_clk;
+
+	/* Enable I2S device, i.e. clock output. */
+	ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXEN));
+
+	goto out;
+
+out_clk:
+	clk_disable(chip->board->dac_clk);
+out:
+	return retval;
+}
+
+static int snd_at73c213_dev_free(struct snd_device *device)
+{
+	struct snd_at73c213 *chip = device->device_data;
+
+	ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS));
+	if (chip->irq >= 0) {
+		free_irq(chip->irq, chip);
+		chip->irq = -1;
+	}
+
+	return 0;
+}
+
+static int snd_at73c213_dev_init(struct snd_card *card,
+				 struct spi_device *spi)
+{
+	static struct snd_device_ops ops = {
+		.dev_free	= snd_at73c213_dev_free,
+	};
+	struct snd_at73c213 *chip = get_chip(card);
+	int irq, retval;
+
+	irq = chip->ssc->irq;
+	if (irq < 0)
+		return irq;
+
+	spin_lock_init(&chip->lock);
+	mutex_init(&chip->mixer_lock);
+	chip->card = card;
+	chip->irq = -1;
+
+	retval = request_irq(irq, snd_at73c213_interrupt, 0, "at73c213", chip);
+	if (retval) {
+		dev_dbg(&chip->spi->dev, "unable to request irq %d\n", irq);
+		goto out;
+	}
+	chip->irq = irq;
+
+	memcpy(&chip->reg_image, &snd_at73c213_original_image,
+			sizeof(snd_at73c213_original_image));
+
+	retval = snd_at73c213_ssc_init(chip);
+	if (retval)
+		goto out_irq;
+
+	retval = snd_at73c213_chip_init(chip);
+	if (retval)
+		goto out_irq;
+
+	retval = snd_at73c213_pcm_new(chip, 0);
+	if (retval)
+		goto out_irq;
+
+	retval = snd_device_new(card, SNDRV_DEV_LOWLEVEL, chip, &ops);
+	if (retval)
+		goto out_irq;
+
+	retval = snd_at73c213_mixer(chip);
+	if (retval)
+		goto out_snd_dev;
+
+	goto out;
+
+out_snd_dev:
+	snd_device_free(card, chip);
+out_irq:
+	free_irq(chip->irq, chip);
+	chip->irq = -1;
+out:
+	return retval;
+}
+
+static int snd_at73c213_probe(struct spi_device *spi)
+{
+	struct snd_card			*card;
+	struct snd_at73c213		*chip;
+	struct at73c213_board_info	*board;
+	int				retval;
+	char				id[16];
+
+	board = spi->dev.platform_data;
+	if (!board) {
+		dev_dbg(&spi->dev, "no platform_data\n");
+		return -ENXIO;
+	}
+
+	if (!board->dac_clk) {
+		dev_dbg(&spi->dev, "no DAC clk\n");
+		return -ENXIO;
+	}
+
+	if (IS_ERR(board->dac_clk)) {
+		dev_dbg(&spi->dev, "no DAC clk\n");
+		return PTR_ERR(board->dac_clk);
+	}
+
+	/* Allocate "card" using some unused identifiers. */
+	snprintf(id, sizeof id, "at73c213_%d", board->ssc_id);
+	retval = snd_card_new(&spi->dev, -1, id, THIS_MODULE,
+			      sizeof(struct snd_at73c213), &card);
+	if (retval < 0)
+		goto out;
+
+	chip = card->private_data;
+	chip->spi = spi;
+	chip->board = board;
+
+	chip->ssc = ssc_request(board->ssc_id);
+	if (IS_ERR(chip->ssc)) {
+		dev_dbg(&spi->dev, "could not get ssc%d device\n",
+				board->ssc_id);
+		retval = PTR_ERR(chip->ssc);
+		goto out_card;
+	}
+
+	retval = snd_at73c213_dev_init(card, spi);
+	if (retval)
+		goto out_ssc;
+
+	strcpy(card->driver, "at73c213");
+	strcpy(card->shortname, board->shortname);
+	sprintf(card->longname, "%s on irq %d", card->shortname, chip->irq);
+
+	retval = snd_card_register(card);
+	if (retval)
+		goto out_ssc;
+
+	dev_set_drvdata(&spi->dev, card);
+
+	goto out;
+
+out_ssc:
+	ssc_free(chip->ssc);
+out_card:
+	snd_card_free(card);
+out:
+	return retval;
+}
+
+static int snd_at73c213_remove(struct spi_device *spi)
+{
+	struct snd_card *card = dev_get_drvdata(&spi->dev);
+	struct snd_at73c213 *chip = card->private_data;
+	int retval;
+
+	/* Stop playback. */
+	ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS));
+
+	/* Mute sound. */
+	retval = snd_at73c213_write_reg(chip, DAC_LMPG, 0x3f);
+	if (retval)
+		goto out;
+	retval = snd_at73c213_write_reg(chip, DAC_RMPG, 0x3f);
+	if (retval)
+		goto out;
+	retval = snd_at73c213_write_reg(chip, DAC_LLOG, 0x3f);
+	if (retval)
+		goto out;
+	retval = snd_at73c213_write_reg(chip, DAC_RLOG, 0x3f);
+	if (retval)
+		goto out;
+	retval = snd_at73c213_write_reg(chip, DAC_LLIG, 0x11);
+	if (retval)
+		goto out;
+	retval = snd_at73c213_write_reg(chip, DAC_RLIG, 0x11);
+	if (retval)
+		goto out;
+	retval = snd_at73c213_write_reg(chip, DAC_AUXG, 0x11);
+	if (retval)
+		goto out;
+
+	/* Turn off PA. */
+	retval = snd_at73c213_write_reg(chip, PA_CTRL,
+					chip->reg_image[PA_CTRL] | 0x0f);
+	if (retval)
+		goto out;
+	msleep(10);
+	retval = snd_at73c213_write_reg(chip, PA_CTRL,
+					(1 << PA_CTRL_APALP) | 0x0f);
+	if (retval)
+		goto out;
+
+	/* Turn off external DAC. */
+	retval = snd_at73c213_write_reg(chip, DAC_CTRL, 0x0c);
+	if (retval)
+		goto out;
+	msleep(2);
+	retval = snd_at73c213_write_reg(chip, DAC_CTRL, 0x00);
+	if (retval)
+		goto out;
+
+	/* Turn off master power. */
+	retval = snd_at73c213_write_reg(chip, DAC_PRECH, 0x00);
+	if (retval)
+		goto out;
+
+out:
+	/* Stop DAC master clock. */
+	clk_disable(chip->board->dac_clk);
+
+	ssc_free(chip->ssc);
+	snd_card_free(card);
+
+	return 0;
+}
+
+#ifdef CONFIG_PM_SLEEP
+
+static int snd_at73c213_suspend(struct device *dev)
+{
+	struct snd_card *card = dev_get_drvdata(dev);
+	struct snd_at73c213 *chip = card->private_data;
+
+	ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXDIS));
+	clk_disable(chip->board->dac_clk);
+
+	return 0;
+}
+
+static int snd_at73c213_resume(struct device *dev)
+{
+	struct snd_card *card = dev_get_drvdata(dev);
+	struct snd_at73c213 *chip = card->private_data;
+
+	clk_enable(chip->board->dac_clk);
+	ssc_writel(chip->ssc->regs, CR, SSC_BIT(CR_TXEN));
+
+	return 0;
+}
+
+static SIMPLE_DEV_PM_OPS(at73c213_pm_ops, snd_at73c213_suspend,
+		snd_at73c213_resume);
+#define AT73C213_PM_OPS (&at73c213_pm_ops)
+
+#else
+#define AT73C213_PM_OPS NULL
+#endif
+
+static struct spi_driver at73c213_driver = {
+	.driver		= {
+		.name	= "at73c213",
+		.pm	= AT73C213_PM_OPS,
+	},
+	.probe		= snd_at73c213_probe,
+	.remove		= snd_at73c213_remove,
+};
+
+module_spi_driver(at73c213_driver);
+
+MODULE_AUTHOR("Hans-Christian Egtvedt <egtvedt@samfundet.no>");
+MODULE_DESCRIPTION("Sound driver for AT73C213 with Atmel SSC");
+MODULE_LICENSE("GPL");