Merge tag 'sound-4.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound

Pull sound updates from Takashi Iwai:
 "We've had quite busy weeks in this cycle.  Looking at ALSA core, the
  significant changes are a few fixes wrt timer and sequencer ioctls
  that have been revealed by fuzzer recently.  Other than that, ASoC
  core got a few updates about DAI link handling, but these are rather
  straightforward refactoring.

  In drivers scene, ASoC received quite lots of new drivers in addition
  to bunch of updates for still ongoing Intel Skylake support and
  topology API.  HD-audio gained a new HDMI/DP hotplug notification via
  component.  FireWire got a pile of code refactoring/updates with
  SCS.1x driver integration.

  More highlights are shown below.

  [ NOTE: this contains also many commits for DRM.  This is due to the
    pull of drm stable branch into sound tree, as the base of i915 audio
    component work for HD-audio.  The highlights below don't contain
    these DRM changes, as these are supposed to be pulled via drm tree
    in anyway sooner or later.  ]

  Core:
   - Handful fixes to harden ALSA timer and sequencer ioctls against
     races reported by syzkaller fuzzer
   - Irq description string can be unique to each card; only for
     HD-audio for now

  ASoC:
   - Conversion of the array of DAI links to a list for supporting
     dynamically adding and removing DAI links
   - Topology API enhancements to make everything more component based
     and being able to specify PCM links via topology
   - Some more fixes for the topology code, though it is still not final
     and ready for enabling in production; we really need to get to the
     point where that can be done
   - A pile of changes for Intel SkyLake drivers which hopefully deliver
     some useful initial functionality for systems with this chipset,
     though there is more work still to come
   - Lots of new features and cleanups for the Renesas drivers
   - ANC support for WM5110
   - New drivers: Imagination Technologies IPs, Atmel class D speaker,
     Cirrus CS47L24 and WM1831, Dialog DA7128, Realtek RT5659 and
     RT56156, Rockchip RK3036, TI PC3168A, and AMD ACP
   - Rename PCM1792a driver to be generic pcm179x

  HD-Audio:
   - Use audio component for i915 HDMI/DP hotplug handling
   - On-demand binding with i915 driver
   - bdl_pos_adj parameter adjustment for Baytrail controllers
   - Enable power_save_node for CX20722; this shouldn't lead to
     regression, hopefully
   - Kabylake HDMI/DP codec support
   - Quirks for Lenovo E50-80, Dell Latitude E-series, and other Dell
     machines
   - A few code refactoring

  FireWire:
   - Lots of code cleanup and refactoring
   - Integrate the support of SCS.1x devices into snd-oxfw driver;
     snd-scs1x driver is obsoleted

  USB-audio:
   - Fix possible NULL dereference at disconnection
   - A regression fix for Native Instruments devices

  Misc:
   - A few code cleanups of fm801 driver"

* tag 'sound-4.5-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/tiwai/sound: (722 commits)
  ALSA: timer: Code cleanup
  ALSA: timer: Harden slave timer list handling
  ALSA: hda - Add fixup for Dell Latitidue E6540
  ALSA: timer: Fix race among timer ioctls
  ALSA: hda - add codec support for Kabylake display audio codec
  ALSA: timer: Fix double unlink of active_list
  ALSA: usb-audio: Fix mixer ctl regression of Native Instrument devices
  ALSA: hda - fix the headset mic detection problem for a Dell laptop
  ALSA: hda - Fix white noise on Dell Latitude E5550
  ALSA: hda_intel: add card number to irq description
  ALSA: seq: Fix race at timer setup and close
  ALSA: seq: Fix missing NULL check at remove_events ioctl
  ALSA: usb-audio: Avoid calling usb_autopm_put_interface() at disconnect
  ASoC: hdac_hdmi: remove unused hdac_hdmi_query_pin_connlist
  ASoC: AMD: Add missing include file
  ALSA: hda - Fixup inverted internal mic for Lenovo E50-80
  ALSA: usb: Add native DSD support for Oppo HA-1
  ASoC: Make aux_dev more like a generic component
  ASoC: bcm2835: cleanup includes by ordering them alphabetically
  ASoC: AMD: Manage ACP 2.x SRAM banks power
  ...

1 files changed, 738 insertions, 0 deletions

diff --git a/sound/soc/atmel/atmel-pdmic.c b/sound/soc/atmel/atmel-pdmic.c
new file mode 100644
index 000000000000..aee4787a0b89
--- /dev/null
+++ b/sound/soc/atmel/atmel-pdmic.c
@@ -0,0 +1,738 @@
+/* Atmel PDMIC driver
+ *
+ * Copyright (C) 2015 Atmel
+ *
+ * Author: Songjun Wu <songjun.wu@atmel.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 or later
+ * as published by the Free Software Foundation.
+ */
+
+#include <linux/of.h>
+#include <linux/clk.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/regmap.h>
+#include <sound/core.h>
+#include <sound/dmaengine_pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/tlv.h>
+#include "atmel-pdmic.h"
+
+struct atmel_pdmic_pdata {
+	u32 mic_min_freq;
+	u32 mic_max_freq;
+	s32 mic_offset;
+	const char *card_name;
+};
+
+struct atmel_pdmic {
+	dma_addr_t phy_base;
+	struct regmap *regmap;
+	struct clk *pclk;
+	struct clk *gclk;
+	int irq;
+	struct snd_pcm_substream *substream;
+	const struct atmel_pdmic_pdata *pdata;
+};
+
+static const struct of_device_id atmel_pdmic_of_match[] = {
+	{
+		.compatible = "atmel,sama5d2-pdmic",
+	}, {
+		/* sentinel */
+	}
+};
+MODULE_DEVICE_TABLE(of, atmel_pdmic_of_match);
+
+#define PDMIC_OFFSET_MAX_VAL	S16_MAX
+#define PDMIC_OFFSET_MIN_VAL	S16_MIN
+
+static struct atmel_pdmic_pdata *atmel_pdmic_dt_init(struct device *dev)
+{
+	struct device_node *np = dev->of_node;
+	struct atmel_pdmic_pdata *pdata;
+
+	if (!np) {
+		dev_err(dev, "device node not found\n");
+		return ERR_PTR(-EINVAL);
+	}
+
+	pdata = devm_kzalloc(dev, sizeof(*pdata), GFP_KERNEL);
+	if (!pdata)
+		return ERR_PTR(-ENOMEM);
+
+	if (of_property_read_string(np, "atmel,model", &pdata->card_name))
+		pdata->card_name = "PDMIC";
+
+	if (of_property_read_u32(np, "atmel,mic-min-freq",
+				 &pdata->mic_min_freq)) {
+		dev_err(dev, "failed to get mic-min-freq\n");
+		return ERR_PTR(-EINVAL);
+	}
+
+	if (of_property_read_u32(np, "atmel,mic-max-freq",
+				 &pdata->mic_max_freq)) {
+		dev_err(dev, "failed to get mic-max-freq\n");
+		return ERR_PTR(-EINVAL);
+	}
+
+	if (pdata->mic_max_freq < pdata->mic_min_freq) {
+		dev_err(dev,
+			"mic-max-freq should not less than mic-min-freq\n");
+		return ERR_PTR(-EINVAL);
+	}
+
+	if (of_property_read_s32(np, "atmel,mic-offset", &pdata->mic_offset))
+		pdata->mic_offset = 0;
+
+	if (pdata->mic_offset > PDMIC_OFFSET_MAX_VAL) {
+		dev_warn(dev,
+			 "mic-offset value %d is larger than the max value %d, the max value is specified\n",
+			 pdata->mic_offset, PDMIC_OFFSET_MAX_VAL);
+		pdata->mic_offset = PDMIC_OFFSET_MAX_VAL;
+	} else if (pdata->mic_offset < PDMIC_OFFSET_MIN_VAL) {
+		dev_warn(dev,
+			 "mic-offset value %d is less than the min value %d, the min value is specified\n",
+			 pdata->mic_offset, PDMIC_OFFSET_MIN_VAL);
+		pdata->mic_offset = PDMIC_OFFSET_MIN_VAL;
+	}
+
+	return pdata;
+}
+
+/* cpu dai component */
+static int atmel_pdmic_cpu_dai_startup(struct snd_pcm_substream *substream,
+					struct snd_soc_dai *cpu_dai)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct atmel_pdmic *dd = snd_soc_card_get_drvdata(rtd->card);
+	int ret;
+
+	ret = clk_prepare_enable(dd->gclk);
+	if (ret)
+		return ret;
+
+	ret =  clk_prepare_enable(dd->pclk);
+	if (ret)
+		return ret;
+
+	/* Clear all bits in the Control Register(PDMIC_CR) */
+	regmap_write(dd->regmap, PDMIC_CR, 0);
+
+	dd->substream = substream;
+
+	/* Enable the overrun error interrupt */
+	regmap_write(dd->regmap, PDMIC_IER, PDMIC_IER_OVRE);
+
+	return 0;
+}
+
+static void atmel_pdmic_cpu_dai_shutdown(struct snd_pcm_substream *substream,
+					struct snd_soc_dai *cpu_dai)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct atmel_pdmic *dd = snd_soc_card_get_drvdata(rtd->card);
+
+	/* Disable the overrun error interrupt */
+	regmap_write(dd->regmap, PDMIC_IDR, PDMIC_IDR_OVRE);
+
+	clk_disable_unprepare(dd->gclk);
+	clk_disable_unprepare(dd->pclk);
+}
+
+static int atmel_pdmic_cpu_dai_prepare(struct snd_pcm_substream *substream,
+					struct snd_soc_dai *cpu_dai)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct atmel_pdmic *dd = snd_soc_card_get_drvdata(rtd->card);
+	u32 val;
+
+	/* Clean the PDMIC Converted Data Register */
+	return regmap_read(dd->regmap, PDMIC_CDR, &val);
+}
+
+static const struct snd_soc_dai_ops atmel_pdmic_cpu_dai_ops = {
+	.startup	= atmel_pdmic_cpu_dai_startup,
+	.shutdown	= atmel_pdmic_cpu_dai_shutdown,
+	.prepare	= atmel_pdmic_cpu_dai_prepare,
+};
+
+#define ATMEL_PDMIC_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE)
+
+static struct snd_soc_dai_driver atmel_pdmic_cpu_dai = {
+	.capture = {
+		.channels_min	= 1,
+		.channels_max	= 1,
+		.rates		= SNDRV_PCM_RATE_KNOT,
+		.formats	= ATMEL_PDMIC_FORMATS,},
+	.ops = &atmel_pdmic_cpu_dai_ops,
+};
+
+static const struct snd_soc_component_driver atmel_pdmic_cpu_dai_component = {
+	.name = "atmel-pdmic",
+};
+
+/* platform */
+#define ATMEL_PDMIC_MAX_BUF_SIZE  (64 * 1024)
+#define ATMEL_PDMIC_PREALLOC_BUF_SIZE  ATMEL_PDMIC_MAX_BUF_SIZE
+
+static const struct snd_pcm_hardware atmel_pdmic_hw = {
+	.info			= SNDRV_PCM_INFO_MMAP
+				| SNDRV_PCM_INFO_MMAP_VALID
+				| SNDRV_PCM_INFO_INTERLEAVED
+				| SNDRV_PCM_INFO_RESUME
+				| SNDRV_PCM_INFO_PAUSE,
+	.formats		= ATMEL_PDMIC_FORMATS,
+	.buffer_bytes_max	= ATMEL_PDMIC_MAX_BUF_SIZE,
+	.period_bytes_min	= 256,
+	.period_bytes_max	= 32 * 1024,
+	.periods_min		= 2,
+	.periods_max		= 256,
+};
+
+static int
+atmel_pdmic_platform_configure_dma(struct snd_pcm_substream *substream,
+				struct snd_pcm_hw_params *params,
+				struct dma_slave_config *slave_config)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct atmel_pdmic *dd = snd_soc_card_get_drvdata(rtd->card);
+	int ret;
+
+	ret = snd_hwparams_to_dma_slave_config(substream, params,
+					       slave_config);
+	if (ret) {
+		dev_err(rtd->platform->dev,
+			"hw params to dma slave configure failed\n");
+		return ret;
+	}
+
+	slave_config->src_addr		= dd->phy_base + PDMIC_CDR;
+	slave_config->src_maxburst	= 1;
+	slave_config->dst_maxburst	= 1;
+
+	return 0;
+}
+
+static const struct snd_dmaengine_pcm_config
+atmel_pdmic_dmaengine_pcm_config = {
+	.prepare_slave_config	= atmel_pdmic_platform_configure_dma,
+	.pcm_hardware		= &atmel_pdmic_hw,
+	.prealloc_buffer_size	= ATMEL_PDMIC_PREALLOC_BUF_SIZE,
+};
+
+/* codec */
+/* Mic Gain = dgain * 2^(-scale) */
+struct mic_gain {
+	unsigned int dgain;
+	unsigned int scale;
+};
+
+/* range from -90 dB to 90 dB */
+static const struct mic_gain mic_gain_table[] = {
+{    1, 15}, {    1, 14},                           /* -90, -84 dB */
+{    3, 15}, {    1, 13}, {    3, 14}, {    1, 12}, /* -81, -78, -75, -72 dB */
+{    5, 14}, {   13, 15},                           /* -70, -68 dB */
+{    9, 14}, {   21, 15}, {   23, 15}, {   13, 14}, /* -65 ~ -62 dB */
+{   29, 15}, {   33, 15}, {   37, 15}, {   41, 15}, /* -61 ~ -58 dB */
+{   23, 14}, {   13, 13}, {   58, 15}, {   65, 15}, /* -57 ~ -54 dB */
+{   73, 15}, {   41, 14}, {   23, 13}, {   13, 12}, /* -53 ~ -50 dB */
+{   29, 13}, {   65, 14}, {   73, 14}, {   41, 13}, /* -49 ~ -46 dB */
+{   23, 12}, {  207, 15}, {   29, 12}, {   65, 13}, /* -45 ~ -42 dB */
+{   73, 13}, {   41, 12}, {   23, 11}, {  413, 15}, /* -41 ~ -38 dB */
+{  463, 15}, {  519, 15}, {  583, 15}, {  327, 14}, /* -37 ~ -34 dB */
+{  367, 14}, {  823, 15}, {  231, 13}, { 1036, 15}, /* -33 ~ -30 dB */
+{ 1163, 15}, { 1305, 15}, {  183, 12}, { 1642, 15}, /* -29 ~ -26 dB */
+{ 1843, 15}, { 2068, 15}, {  145, 11}, { 2603, 15}, /* -25 ~ -22 dB */
+{  365, 12}, { 3277, 15}, { 3677, 15}, { 4125, 15}, /* -21 ~ -18 dB */
+{ 4629, 15}, { 5193, 15}, { 5827, 15}, { 3269, 14}, /* -17 ~ -14 dB */
+{  917, 12}, { 8231, 15}, { 9235, 15}, { 5181, 14}, /* -13 ~ -10 dB */
+{11627, 15}, {13045, 15}, {14637, 15}, {16423, 15}, /*  -9 ~ -6 dB */
+{18427, 15}, {20675, 15}, { 5799, 13}, {26029, 15}, /*  -5 ~ -2 dB */
+{ 7301, 13}, {    1,  0}, {18383, 14}, {10313, 13}, /*  -1 ~ 2 dB */
+{23143, 14}, {25967, 14}, {29135, 14}, {16345, 13}, /*   3 ~ 6 dB */
+{ 4585, 11}, {20577, 13}, { 1443,  9}, {25905, 13}, /*   7 ~ 10 dB */
+{14533, 12}, { 8153, 11}, { 2287,  9}, {20529, 12}, /*  11 ~ 14 dB */
+{11517, 11}, { 6461, 10}, {28997, 12}, { 4067,  9}, /*  15 ~ 18 dB */
+{18253, 11}, {   10,  0}, {22979, 11}, {25783, 11}, /*  19 ~ 22 dB */
+{28929, 11}, {32459, 11}, { 9105,  9}, {20431, 10}, /*  23 ~ 26 dB */
+{22925, 10}, {12861,  9}, { 7215,  8}, {16191,  9}, /*  27 ~ 30 dB */
+{ 9083,  8}, {20383,  9}, {11435,  8}, { 6145,  7}, /*  31 ~ 34 dB */
+{ 3599,  6}, {32305,  9}, {18123,  8}, {20335,  8}, /*  35 ~ 38 dB */
+{  713,  3}, {  100,  0}, { 7181,  6}, { 8057,  6}, /*  39 ~ 42 dB */
+{  565,  2}, {20287,  7}, {11381,  6}, {25539,  7}, /*  43 ~ 46 dB */
+{ 1791,  3}, { 4019,  4}, { 9019,  5}, {20239,  6}, /*  47 ~ 50 dB */
+{ 5677,  4}, {25479,  6}, { 7147,  4}, { 8019,  4}, /*  51 ~ 54 dB */
+{17995,  5}, {20191,  5}, {11327,  4}, {12709,  4}, /*  55 ~ 58 dB */
+{ 3565,  2}, { 1000,  0}, { 1122,  0}, { 1259,  0}, /*  59 ~ 62 dB */
+{ 2825,  1}, {12679,  3}, { 7113,  2}, { 7981,  2}, /*  63 ~ 66 dB */
+{ 8955,  2}, {20095,  3}, {22547,  3}, {12649,  2}, /*  67 ~ 70 dB */
+{28385,  3}, { 3981,  0}, {17867,  2}, {20047,  2}, /*  71 ~ 74 dB */
+{11247,  1}, {12619,  1}, {14159,  1}, {31773,  2}, /*  75 ~ 78 dB */
+{17825,  1}, {10000,  0}, {11220,  0}, {12589,  0}, /*  79 ~ 82 dB */
+{28251,  1}, {15849,  0}, {17783,  0}, {19953,  0}, /*  83 ~ 86 dB */
+{22387,  0}, {25119,  0}, {28184,  0}, {31623,  0}, /*  87 ~ 90 dB */
+};
+
+static const DECLARE_TLV_DB_RANGE(mic_gain_tlv,
+	0, 1, TLV_DB_SCALE_ITEM(-9000, 600, 0),
+	2, 5, TLV_DB_SCALE_ITEM(-8100, 300, 0),
+	6, 7, TLV_DB_SCALE_ITEM(-7000, 200, 0),
+	8, ARRAY_SIZE(mic_gain_table)-1, TLV_DB_SCALE_ITEM(-6500, 100, 0),
+);
+
+int pdmic_get_mic_volsw(struct snd_kcontrol *kcontrol,
+	struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
+	unsigned int dgain_val, scale_val;
+	int i;
+
+	dgain_val = (snd_soc_read(codec, PDMIC_DSPR1) & PDMIC_DSPR1_DGAIN_MASK)
+		    >> PDMIC_DSPR1_DGAIN_SHIFT;
+
+	scale_val = (snd_soc_read(codec, PDMIC_DSPR0) & PDMIC_DSPR0_SCALE_MASK)
+		    >> PDMIC_DSPR0_SCALE_SHIFT;
+
+	for (i = 0; i < ARRAY_SIZE(mic_gain_table); i++) {
+		if ((mic_gain_table[i].dgain == dgain_val) &&
+		    (mic_gain_table[i].scale == scale_val))
+			ucontrol->value.integer.value[0] = i;
+	}
+
+	return 0;
+}
+
+static int pdmic_put_mic_volsw(struct snd_kcontrol *kcontrol,
+	struct snd_ctl_elem_value *ucontrol)
+{
+	struct soc_mixer_control *mc =
+		(struct soc_mixer_control *)kcontrol->private_value;
+	struct snd_soc_codec *codec = snd_soc_kcontrol_codec(kcontrol);
+	int max = mc->max;
+	unsigned int val;
+	int ret;
+
+	val = ucontrol->value.integer.value[0];
+
+	if (val > max)
+		return -EINVAL;
+
+	ret = snd_soc_update_bits(codec, PDMIC_DSPR1, PDMIC_DSPR1_DGAIN_MASK,
+			 mic_gain_table[val].dgain << PDMIC_DSPR1_DGAIN_SHIFT);
+	if (ret < 0)
+		return ret;
+
+	ret = snd_soc_update_bits(codec, PDMIC_DSPR0, PDMIC_DSPR0_SCALE_MASK,
+			 mic_gain_table[val].scale << PDMIC_DSPR0_SCALE_SHIFT);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static const struct snd_kcontrol_new atmel_pdmic_snd_controls[] = {
+SOC_SINGLE_EXT_TLV("Mic Capture Volume", PDMIC_DSPR1, PDMIC_DSPR1_DGAIN_SHIFT,
+		   ARRAY_SIZE(mic_gain_table)-1, 0,
+		   pdmic_get_mic_volsw, pdmic_put_mic_volsw, mic_gain_tlv),
+
+SOC_SINGLE("High Pass Filter Switch", PDMIC_DSPR0,
+	   PDMIC_DSPR0_HPFBYP_SHIFT, 1, 1),
+
+SOC_SINGLE("SINCC Filter Switch", PDMIC_DSPR0, PDMIC_DSPR0_SINBYP_SHIFT, 1, 1),
+};
+
+static int atmel_pdmic_codec_probe(struct snd_soc_codec *codec)
+{
+	struct snd_soc_card *card = snd_soc_codec_get_drvdata(codec);
+	struct atmel_pdmic *dd = snd_soc_card_get_drvdata(card);
+
+	snd_soc_update_bits(codec, PDMIC_DSPR1, PDMIC_DSPR1_OFFSET_MASK,
+		     (u32)(dd->pdata->mic_offset << PDMIC_DSPR1_OFFSET_SHIFT));
+
+	return 0;
+}
+
+static struct snd_soc_codec_driver soc_codec_dev_pdmic = {
+	.probe		= atmel_pdmic_codec_probe,
+	.controls	= atmel_pdmic_snd_controls,
+	.num_controls	= ARRAY_SIZE(atmel_pdmic_snd_controls),
+};
+
+/* codec dai component */
+#define PDMIC_MR_PRESCAL_MAX_VAL 127
+
+static int
+atmel_pdmic_codec_dai_hw_params(struct snd_pcm_substream *substream,
+			    struct snd_pcm_hw_params *params,
+			    struct snd_soc_dai *codec_dai)
+{
+	struct snd_soc_pcm_runtime *rtd = substream->private_data;
+	struct atmel_pdmic *dd = snd_soc_card_get_drvdata(rtd->card);
+	struct snd_soc_codec *codec = codec_dai->codec;
+	unsigned int rate_min = substream->runtime->hw.rate_min;
+	unsigned int rate_max = substream->runtime->hw.rate_max;
+	int fs = params_rate(params);
+	int bits = params_width(params);
+	unsigned long pclk_rate, gclk_rate;
+	unsigned int f_pdmic;
+	u32 mr_val, dspr0_val, pclk_prescal, gclk_prescal;
+
+	if (params_channels(params) != 1) {
+		dev_err(codec->dev,
+			"only supports one channel\n");
+		return -EINVAL;
+	}
+
+	if ((fs < rate_min) || (fs > rate_max)) {
+		dev_err(codec->dev,
+			"sample rate is %dHz, min rate is %dHz, max rate is %dHz\n",
+			fs, rate_min, rate_max);
+
+		return -EINVAL;
+	}
+
+	switch (bits) {
+	case 16:
+		dspr0_val = (PDMIC_DSPR0_SIZE_16_BITS
+			     << PDMIC_DSPR0_SIZE_SHIFT);
+		break;
+	case 32:
+		dspr0_val = (PDMIC_DSPR0_SIZE_32_BITS
+			     << PDMIC_DSPR0_SIZE_SHIFT);
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	if ((fs << 7) > (rate_max << 6)) {
+		f_pdmic = fs << 6;
+		dspr0_val |= PDMIC_DSPR0_OSR_64 << PDMIC_DSPR0_OSR_SHIFT;
+	} else {
+		f_pdmic = fs << 7;
+		dspr0_val |= PDMIC_DSPR0_OSR_128 << PDMIC_DSPR0_OSR_SHIFT;
+	}
+
+	pclk_rate = clk_get_rate(dd->pclk);
+	gclk_rate = clk_get_rate(dd->gclk);
+
+	/* PRESCAL = SELCK/(2*f_pdmic) - 1*/
+	pclk_prescal = (u32)(pclk_rate/(f_pdmic << 1)) - 1;
+	gclk_prescal = (u32)(gclk_rate/(f_pdmic << 1)) - 1;
+
+	if ((pclk_prescal > PDMIC_MR_PRESCAL_MAX_VAL) ||
+	    (gclk_rate/((gclk_prescal + 1) << 1) <
+	     pclk_rate/((pclk_prescal + 1) << 1))) {
+		mr_val = gclk_prescal << PDMIC_MR_PRESCAL_SHIFT;
+		mr_val |= PDMIC_MR_CLKS_GCK << PDMIC_MR_CLKS_SHIFT;
+	} else {
+		mr_val = pclk_prescal << PDMIC_MR_PRESCAL_SHIFT;
+		mr_val |= PDMIC_MR_CLKS_PCK << PDMIC_MR_CLKS_SHIFT;
+	}
+
+	snd_soc_update_bits(codec, PDMIC_MR,
+		PDMIC_MR_PRESCAL_MASK | PDMIC_MR_CLKS_MASK, mr_val);
+
+	snd_soc_update_bits(codec, PDMIC_DSPR0,
+		PDMIC_DSPR0_OSR_MASK | PDMIC_DSPR0_SIZE_MASK, dspr0_val);
+
+	return 0;
+}
+
+static int atmel_pdmic_codec_dai_prepare(struct snd_pcm_substream *substream,
+					struct snd_soc_dai *codec_dai)
+{
+	struct snd_soc_codec *codec = codec_dai->codec;
+
+	snd_soc_update_bits(codec, PDMIC_CR, PDMIC_CR_ENPDM_MASK,
+			    PDMIC_CR_ENPDM_DIS << PDMIC_CR_ENPDM_SHIFT);
+
+	return 0;
+}
+
+static int atmel_pdmic_codec_dai_trigger(struct snd_pcm_substream *substream,
+					int cmd, struct snd_soc_dai *codec_dai)
+{
+	struct snd_soc_codec *codec = codec_dai->codec;
+	u32 val;
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+	case SNDRV_PCM_TRIGGER_RESUME:
+	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+		val = PDMIC_CR_ENPDM_EN << PDMIC_CR_ENPDM_SHIFT;
+		break;
+	case SNDRV_PCM_TRIGGER_STOP:
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+		val = PDMIC_CR_ENPDM_DIS << PDMIC_CR_ENPDM_SHIFT;
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	snd_soc_update_bits(codec, PDMIC_CR, PDMIC_CR_ENPDM_MASK, val);
+
+	return 0;
+}
+
+static const struct snd_soc_dai_ops atmel_pdmic_codec_dai_ops = {
+	.hw_params	= atmel_pdmic_codec_dai_hw_params,
+	.prepare	= atmel_pdmic_codec_dai_prepare,
+	.trigger	= atmel_pdmic_codec_dai_trigger,
+};
+
+#define ATMEL_PDMIC_CODEC_DAI_NAME  "atmel-pdmic-hifi"
+
+static struct snd_soc_dai_driver atmel_pdmic_codec_dai = {
+	.name = ATMEL_PDMIC_CODEC_DAI_NAME,
+	.capture = {
+		.stream_name	= "Capture",
+		.channels_min	= 1,
+		.channels_max	= 1,
+		.rates		= SNDRV_PCM_RATE_KNOT,
+		.formats	= ATMEL_PDMIC_FORMATS,
+	},
+	.ops = &atmel_pdmic_codec_dai_ops,
+};
+
+/* ASoC sound card */
+static int atmel_pdmic_asoc_card_init(struct device *dev,
+				struct snd_soc_card *card)
+{
+	struct snd_soc_dai_link *dai_link;
+	struct atmel_pdmic *dd = snd_soc_card_get_drvdata(card);
+
+	dai_link = devm_kzalloc(dev, sizeof(*dai_link), GFP_KERNEL);
+	if (!dai_link)
+		return -ENOMEM;
+
+	dai_link->name			= "PDMIC";
+	dai_link->stream_name		= "PDMIC PCM";
+	dai_link->codec_dai_name	= ATMEL_PDMIC_CODEC_DAI_NAME;
+	dai_link->cpu_dai_name		= dev_name(dev);
+	dai_link->codec_name		= dev_name(dev);
+	dai_link->platform_name		= dev_name(dev);
+
+	card->dai_link	= dai_link;
+	card->num_links	= 1;
+	card->name	= dd->pdata->card_name;
+	card->dev	= dev;
+
+	return 0;
+}
+
+static void atmel_pdmic_get_sample_rate(struct atmel_pdmic *dd,
+	unsigned int *rate_min, unsigned int *rate_max)
+{
+	u32 mic_min_freq = dd->pdata->mic_min_freq;
+	u32 mic_max_freq = dd->pdata->mic_max_freq;
+	u32 clk_max_rate = (u32)(clk_get_rate(dd->pclk) >> 1);
+	u32 clk_min_rate = (u32)(clk_get_rate(dd->gclk) >> 8);
+
+	if (mic_max_freq > clk_max_rate)
+		mic_max_freq = clk_max_rate;
+
+	if (mic_min_freq < clk_min_rate)
+		mic_min_freq = clk_min_rate;
+
+	*rate_min = DIV_ROUND_CLOSEST(mic_min_freq, 128);
+	*rate_max = mic_max_freq >> 6;
+}
+
+/* PDMIC interrupt handler */
+static irqreturn_t atmel_pdmic_interrupt(int irq, void *dev_id)
+{
+	struct atmel_pdmic *dd = (struct atmel_pdmic *)dev_id;
+	u32 pdmic_isr;
+	irqreturn_t ret = IRQ_NONE;
+
+	regmap_read(dd->regmap, PDMIC_ISR, &pdmic_isr);
+
+	if (pdmic_isr & PDMIC_ISR_OVRE) {
+		regmap_update_bits(dd->regmap, PDMIC_CR, PDMIC_CR_ENPDM_MASK,
+				   PDMIC_CR_ENPDM_DIS << PDMIC_CR_ENPDM_SHIFT);
+
+		snd_pcm_stop_xrun(dd->substream);
+
+		ret = IRQ_HANDLED;
+	}
+
+	return ret;
+}
+
+/* regmap configuration */
+#define ATMEL_PDMIC_REG_MAX    0x124
+static const struct regmap_config atmel_pdmic_regmap_config = {
+	.reg_bits	= 32,
+	.reg_stride	= 4,
+	.val_bits	= 32,
+	.max_register	= ATMEL_PDMIC_REG_MAX,
+};
+
+static int atmel_pdmic_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct atmel_pdmic *dd;
+	struct resource *res;
+	void __iomem *io_base;
+	const struct atmel_pdmic_pdata *pdata;
+	struct snd_soc_card *card;
+	unsigned int rate_min, rate_max;
+	int ret;
+
+	pdata = atmel_pdmic_dt_init(dev);
+	if (IS_ERR(pdata))
+		return PTR_ERR(pdata);
+
+	dd = devm_kzalloc(dev, sizeof(*dd), GFP_KERNEL);
+	if (!dd)
+		return -ENOMEM;
+
+	dd->pdata = pdata;
+
+	dd->irq = platform_get_irq(pdev, 0);
+	if (dd->irq < 0) {
+		ret = dd->irq;
+		dev_err(dev, "failed to could not get irq: %d\n", ret);
+		return ret;
+	}
+
+	dd->pclk = devm_clk_get(dev, "pclk");
+	if (IS_ERR(dd->pclk)) {
+		ret = PTR_ERR(dd->pclk);
+		dev_err(dev, "failed to get peripheral clock: %d\n", ret);
+		return ret;
+	}
+
+	dd->gclk = devm_clk_get(dev, "gclk");
+	if (IS_ERR(dd->gclk)) {
+		ret = PTR_ERR(dd->gclk);
+		dev_err(dev, "failed to get GCK: %d\n", ret);
+		return ret;
+	}
+
+	/* The gclk clock frequency must always be tree times
+	 * lower than the pclk clock frequency
+	 */
+	ret = clk_set_rate(dd->gclk, clk_get_rate(dd->pclk)/3);
+	if (ret) {
+		dev_err(dev, "failed to set GCK clock rate: %d\n", ret);
+		return ret;
+	}
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	if (!res) {
+		dev_err(dev, "no memory resource\n");
+		return -ENXIO;
+	}
+
+	io_base = devm_ioremap_resource(dev, res);
+	if (IS_ERR(io_base)) {
+		ret = PTR_ERR(io_base);
+		dev_err(dev, "failed to remap register memory: %d\n", ret);
+		return ret;
+	}
+
+	dd->phy_base = res->start;
+
+	dd->regmap = devm_regmap_init_mmio(dev, io_base,
+					   &atmel_pdmic_regmap_config);
+	if (IS_ERR(dd->regmap)) {
+		ret = PTR_ERR(dd->regmap);
+		dev_err(dev, "failed to init register map: %d\n", ret);
+		return ret;
+	}
+
+	ret =  devm_request_irq(dev, dd->irq, atmel_pdmic_interrupt, 0,
+				"PDMIC", (void *)dd);
+	if (ret < 0) {
+		dev_err(dev, "can't register ISR for IRQ %u (ret=%i)\n",
+			dd->irq, ret);
+		return ret;
+	}
+
+	/* Get the minimal and maximal sample rate that micphone supports */
+	atmel_pdmic_get_sample_rate(dd, &rate_min, &rate_max);
+
+	/* register cpu dai */
+	atmel_pdmic_cpu_dai.capture.rate_min = rate_min;
+	atmel_pdmic_cpu_dai.capture.rate_max = rate_max;
+	ret = devm_snd_soc_register_component(dev,
+					      &atmel_pdmic_cpu_dai_component,
+					      &atmel_pdmic_cpu_dai, 1);
+	if (ret) {
+		dev_err(dev, "could not register CPU DAI: %d\n", ret);
+		return ret;
+	}
+
+	/* register platform */
+	ret = devm_snd_dmaengine_pcm_register(dev,
+					     &atmel_pdmic_dmaengine_pcm_config,
+					     0);
+	if (ret) {
+		dev_err(dev, "could not register platform: %d\n", ret);
+		return ret;
+	}
+
+	/* register codec and codec dai */
+	atmel_pdmic_codec_dai.capture.rate_min = rate_min;
+	atmel_pdmic_codec_dai.capture.rate_max = rate_max;
+	ret = snd_soc_register_codec(dev, &soc_codec_dev_pdmic,
+				     &atmel_pdmic_codec_dai, 1);
+	if (ret) {
+		dev_err(dev, "could not register codec: %d\n", ret);
+		return ret;
+	}
+
+	/* register sound card */
+	card = devm_kzalloc(dev, sizeof(*card), GFP_KERNEL);
+	if (!card) {
+		ret = -ENOMEM;
+		goto unregister_codec;
+	}
+
+	snd_soc_card_set_drvdata(card, dd);
+	platform_set_drvdata(pdev, card);
+
+	ret = atmel_pdmic_asoc_card_init(dev, card);
+	if (ret) {
+		dev_err(dev, "failed to init sound card: %d\n", ret);
+		goto unregister_codec;
+	}
+
+	ret = devm_snd_soc_register_card(dev, card);
+	if (ret) {
+		dev_err(dev, "failed to register sound card: %d\n", ret);
+		goto unregister_codec;
+	}
+
+	return 0;
+
+unregister_codec:
+	snd_soc_unregister_codec(dev);
+	return ret;
+}
+
+static int atmel_pdmic_remove(struct platform_device *pdev)
+{
+	snd_soc_unregister_codec(&pdev->dev);
+	return 0;
+}
+
+static struct platform_driver atmel_pdmic_driver = {
+	.driver	= {
+		.name		= "atmel-pdmic",
+		.of_match_table	= of_match_ptr(atmel_pdmic_of_match),
+		.pm		= &snd_soc_pm_ops,
+	},
+	.probe	= atmel_pdmic_probe,
+	.remove	= atmel_pdmic_remove,
+};
+module_platform_driver(atmel_pdmic_driver);
+
+MODULE_DESCRIPTION("Atmel PDMIC driver under ALSA SoC architecture");
+MODULE_AUTHOR("Songjun Wu <songjun.wu@atmel.com>");
+MODULE_LICENSE("GPL v2");