Applied "ASoC: img: Add driver for SPDIF input controller" to the asoc tree

Message ID E1ZtzWy-0003T6-Kw@finisterre
State New
Headers show

Commit Message

Mark Brown Nov. 4, 2015, 2:59 p.m.
The patch

   ASoC: img: Add driver for SPDIF input controller

has been applied to the asoc tree at

   git://git.kernel.org/pub/scm/linux/kernel/git/broonie/sound.git 

All being well this means that it will be integrated into the linux-next
tree (usually sometime in the next 24 hours) and sent to Linus during
the next merge window (or sooner if it is a bug fix), however if
problems are discovered then the patch may be dropped or reverted.  

You may get further e-mails resulting from automated or manual testing
and review of the tree, please engage with people reporting problems and
send followup patches addressing any issues that are reported if needed.

If any updates are required or you are submitting further changes they
should be sent as incremental updates against current git, existing
patches will not be replaced.

Please add any relevant lists and maintainers to the CCs when replying
to this mail.

Thanks,
Mark

From 97a071a6f89bc5e7e1e998d78f35b93d596a3c54 Mon Sep 17 00:00:00 2001
From: "Damien.Horsley" <Damien.Horsley@imgtec.com>

Date: Wed, 4 Nov 2015 14:40:54 +0000
Subject: [PATCH] ASoC: img: Add driver for SPDIF input controller

Add driver for Imagination Technologies SDPIF input
controller

Signed-off-by: Damien.Horsley <Damien.Horsley@imgtec.com>

Signed-off-by: Mark Brown <broonie@kernel.org>

---
 sound/soc/img/Kconfig        |   8 +
 sound/soc/img/Makefile       |   1 +
 sound/soc/img/img-spdif-in.c | 806 +++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 815 insertions(+)
 create mode 100644 sound/soc/img/img-spdif-in.c

-- 
2.6.1

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Patch

diff --git a/sound/soc/img/Kconfig b/sound/soc/img/Kconfig
index 3bb507e..161ce90 100644
--- a/sound/soc/img/Kconfig
+++ b/sound/soc/img/Kconfig
@@ -26,3 +26,11 @@  config SND_SOC_IMG_PARALLEL_OUT
 	help
 	  Say Y or M if you want to add support for parallel out driver for
 	  Imagination Technologies parallel out device.
+
+config SND_SOC_IMG_SPDIF_IN
+	tristate "Imagination SPDIF Input Device Driver"
+	depends on SND_SOC_IMG
+	select SND_SOC_GENERIC_DMAENGINE_PCM
+	help
+	  Say Y or M if you want to add support for SPDIF input driver for
+	  Imagination Technologies SPDIF input device.
diff --git a/sound/soc/img/Makefile b/sound/soc/img/Makefile
index da89763..85ded5e 100644
--- a/sound/soc/img/Makefile
+++ b/sound/soc/img/Makefile
@@ -1,3 +1,4 @@ 
 obj-$(CONFIG_SND_SOC_IMG_I2S_IN) += img-i2s-in.o
 obj-$(CONFIG_SND_SOC_IMG_I2S_OUT) += img-i2s-out.o
 obj-$(CONFIG_SND_SOC_IMG_PARALLEL_OUT) += img-parallel-out.o
+obj-$(CONFIG_SND_SOC_IMG_SPDIF_IN) += img-spdif-in.o
diff --git a/sound/soc/img/img-spdif-in.c b/sound/soc/img/img-spdif-in.c
new file mode 100644
index 0000000..4d9953d
--- /dev/null
+++ b/sound/soc/img/img-spdif-in.c
@@ -0,0 +1,806 @@ 
+/*
+ * IMG SPDIF input controller driver
+ *
+ * Copyright (C) 2015 Imagination Technologies Ltd.
+ *
+ * Author: Damien Horsley <Damien.Horsley@imgtec.com>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms and conditions of the GNU General Public License,
+ * version 2, as published by the Free Software Foundation.
+ */
+
+#include <linux/clk.h>
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/platform_device.h>
+#include <linux/reset.h>
+
+#include <sound/core.h>
+#include <sound/dmaengine_pcm.h>
+#include <sound/initval.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+
+#define IMG_SPDIF_IN_RX_FIFO_OFFSET		0
+
+#define IMG_SPDIF_IN_CTL			0x4
+#define IMG_SPDIF_IN_CTL_LOCKLO_MASK		0xff
+#define IMG_SPDIF_IN_CTL_LOCKLO_SHIFT		0
+#define IMG_SPDIF_IN_CTL_LOCKHI_MASK		0xff00
+#define IMG_SPDIF_IN_CTL_LOCKHI_SHIFT		8
+#define IMG_SPDIF_IN_CTL_TRK_MASK		0xff0000
+#define IMG_SPDIF_IN_CTL_TRK_SHIFT		16
+#define IMG_SPDIF_IN_CTL_SRD_MASK		0x70000000
+#define IMG_SPDIF_IN_CTL_SRD_SHIFT		28
+#define IMG_SPDIF_IN_CTL_SRT_MASK		BIT(31)
+
+#define IMG_SPDIF_IN_STATUS			0x8
+#define IMG_SPDIF_IN_STATUS_SAM_MASK		0x7000
+#define IMG_SPDIF_IN_STATUS_SAM_SHIFT		12
+#define IMG_SPDIF_IN_STATUS_LOCK_MASK		BIT(15)
+#define IMG_SPDIF_IN_STATUS_LOCK_SHIFT		15
+
+#define IMG_SPDIF_IN_CLKGEN			0x1c
+#define IMG_SPDIF_IN_CLKGEN_NOM_MASK		0x3ff
+#define IMG_SPDIF_IN_CLKGEN_NOM_SHIFT		0
+#define IMG_SPDIF_IN_CLKGEN_HLD_MASK		0x3ff0000
+#define IMG_SPDIF_IN_CLKGEN_HLD_SHIFT		16
+
+#define IMG_SPDIF_IN_CSL			0x20
+
+#define IMG_SPDIF_IN_CSH			0x24
+#define IMG_SPDIF_IN_CSH_MASK			0xff
+#define IMG_SPDIF_IN_CSH_SHIFT			0
+
+#define IMG_SPDIF_IN_SOFT_RESET			0x28
+#define IMG_SPDIF_IN_SOFT_RESET_MASK		BIT(0)
+
+#define IMG_SPDIF_IN_ACLKGEN_START		0x2c
+#define IMG_SPDIF_IN_ACLKGEN_NOM_MASK		0x3ff
+#define IMG_SPDIF_IN_ACLKGEN_NOM_SHIFT		0
+#define IMG_SPDIF_IN_ACLKGEN_HLD_MASK		0xffc00
+#define IMG_SPDIF_IN_ACLKGEN_HLD_SHIFT		10
+#define IMG_SPDIF_IN_ACLKGEN_TRK_MASK		0xff00000
+#define IMG_SPDIF_IN_ACLKGEN_TRK_SHIFT		20
+
+#define IMG_SPDIF_IN_NUM_ACLKGEN		4
+
+struct img_spdif_in {
+	spinlock_t lock;
+	void __iomem *base;
+	struct clk *clk_sys;
+	struct snd_dmaengine_dai_dma_data dma_data;
+	struct device *dev;
+	unsigned int trk;
+	bool multi_freq;
+	int lock_acquire;
+	int lock_release;
+	unsigned int single_freq;
+	unsigned int multi_freqs[IMG_SPDIF_IN_NUM_ACLKGEN];
+	bool active;
+
+	/* Write-only registers */
+	unsigned int aclkgen_regs[IMG_SPDIF_IN_NUM_ACLKGEN];
+};
+
+static inline void img_spdif_in_writel(struct img_spdif_in *spdif,
+					u32 val, u32 reg)
+{
+	writel(val, spdif->base + reg);
+}
+
+static inline u32 img_spdif_in_readl(struct img_spdif_in *spdif, u32 reg)
+{
+	return readl(spdif->base + reg);
+}
+
+static inline void img_spdif_in_aclkgen_writel(struct img_spdif_in *spdif,
+						u32 index)
+{
+	img_spdif_in_writel(spdif, spdif->aclkgen_regs[index],
+			IMG_SPDIF_IN_ACLKGEN_START + (index * 0x4));
+}
+
+static int img_spdif_in_check_max_rate(struct img_spdif_in *spdif,
+		unsigned int sample_rate, unsigned long *actual_freq)
+{
+	unsigned long min_freq, freq_t;
+
+	/* Clock rate must be at least 24x the bit rate */
+	min_freq = sample_rate * 2 * 32 * 24;
+
+	freq_t = clk_get_rate(spdif->clk_sys);
+
+	if (freq_t < min_freq)
+		return -EINVAL;
+
+	*actual_freq = freq_t;
+
+	return 0;
+}
+
+static int img_spdif_in_do_clkgen_calc(unsigned int rate, unsigned int *pnom,
+		unsigned int *phld, unsigned long clk_rate)
+{
+	unsigned int ori, nom, hld;
+
+	/*
+	 * Calculate oversampling ratio, nominal phase increment and hold
+	 * increment for the given rate / frequency
+	 */
+
+	if (!rate)
+		return -EINVAL;
+
+	ori = clk_rate / (rate * 64);
+
+	if (!ori)
+		return -EINVAL;
+
+	nom = (4096 / ori) + 1;
+	do
+		hld = 4096 - (--nom * (ori - 1));
+	while (hld < 120);
+
+	*pnom = nom;
+	*phld = hld;
+
+	return 0;
+}
+
+static int img_spdif_in_do_clkgen_single(struct img_spdif_in *spdif,
+		unsigned int rate)
+{
+	unsigned int nom, hld;
+	unsigned long flags, clk_rate;
+	int ret = 0;
+	u32 reg;
+
+	ret = img_spdif_in_check_max_rate(spdif, rate, &clk_rate);
+	if (ret)
+		return ret;
+
+	ret = img_spdif_in_do_clkgen_calc(rate, &nom, &hld, clk_rate);
+	if (ret)
+		return ret;
+
+	reg = (nom << IMG_SPDIF_IN_CLKGEN_NOM_SHIFT) &
+		IMG_SPDIF_IN_CLKGEN_NOM_MASK;
+	reg |= (hld << IMG_SPDIF_IN_CLKGEN_HLD_SHIFT) &
+		IMG_SPDIF_IN_CLKGEN_HLD_MASK;
+
+	spin_lock_irqsave(&spdif->lock, flags);
+
+	if (spdif->active) {
+		spin_unlock_irqrestore(&spdif->lock, flags);
+		return -EBUSY;
+	}
+
+	img_spdif_in_writel(spdif, reg, IMG_SPDIF_IN_CLKGEN);
+
+	spdif->single_freq = rate;
+
+	spin_unlock_irqrestore(&spdif->lock, flags);
+
+	return 0;
+}
+
+static int img_spdif_in_do_clkgen_multi(struct img_spdif_in *spdif,
+		unsigned int multi_freqs[])
+{
+	unsigned int nom, hld, rate, max_rate = 0;
+	unsigned long flags, clk_rate;
+	int i, ret = 0;
+	u32 reg, trk_reg, temp_regs[IMG_SPDIF_IN_NUM_ACLKGEN];
+
+	for (i = 0; i < IMG_SPDIF_IN_NUM_ACLKGEN; i++)
+		if (multi_freqs[i] > max_rate)
+			max_rate = multi_freqs[i];
+
+	ret = img_spdif_in_check_max_rate(spdif, max_rate, &clk_rate);
+	if (ret)
+		return ret;
+
+	for (i = 0; i < IMG_SPDIF_IN_NUM_ACLKGEN; i++) {
+		rate = multi_freqs[i];
+
+		ret = img_spdif_in_do_clkgen_calc(rate, &nom, &hld, clk_rate);
+		if (ret)
+			return ret;
+
+		reg = (nom << IMG_SPDIF_IN_ACLKGEN_NOM_SHIFT) &
+			IMG_SPDIF_IN_ACLKGEN_NOM_MASK;
+		reg |= (hld << IMG_SPDIF_IN_ACLKGEN_HLD_SHIFT) &
+			IMG_SPDIF_IN_ACLKGEN_HLD_MASK;
+		temp_regs[i] = reg;
+	}
+
+	spin_lock_irqsave(&spdif->lock, flags);
+
+	if (spdif->active) {
+		spin_unlock_irqrestore(&spdif->lock, flags);
+		return -EBUSY;
+	}
+
+	trk_reg = spdif->trk << IMG_SPDIF_IN_ACLKGEN_TRK_SHIFT;
+
+	for (i = 0; i < IMG_SPDIF_IN_NUM_ACLKGEN; i++) {
+		spdif->aclkgen_regs[i] = temp_regs[i] | trk_reg;
+		img_spdif_in_aclkgen_writel(spdif, i);
+	}
+
+	spdif->multi_freq = true;
+	spdif->multi_freqs[0] = multi_freqs[0];
+	spdif->multi_freqs[1] = multi_freqs[1];
+	spdif->multi_freqs[2] = multi_freqs[2];
+	spdif->multi_freqs[3] = multi_freqs[3];
+
+	spin_unlock_irqrestore(&spdif->lock, flags);
+
+	return 0;
+}
+
+static int img_spdif_in_iec958_info(struct snd_kcontrol *kcontrol,
+		struct snd_ctl_elem_info *uinfo)
+{
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_IEC958;
+	uinfo->count = 1;
+
+	return 0;
+}
+
+static int img_spdif_in_get_status_mask(struct snd_kcontrol *kcontrol,
+				       struct snd_ctl_elem_value *ucontrol)
+{
+	ucontrol->value.iec958.status[0] = 0xff;
+	ucontrol->value.iec958.status[1] = 0xff;
+	ucontrol->value.iec958.status[2] = 0xff;
+	ucontrol->value.iec958.status[3] = 0xff;
+	ucontrol->value.iec958.status[4] = 0xff;
+
+	return 0;
+}
+
+static int img_spdif_in_get_status(struct snd_kcontrol *kcontrol,
+				  struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
+	struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(cpu_dai);
+	u32 reg;
+
+	reg = img_spdif_in_readl(spdif, IMG_SPDIF_IN_CSL);
+	ucontrol->value.iec958.status[0] = reg & 0xff;
+	ucontrol->value.iec958.status[1] = (reg >> 8) & 0xff;
+	ucontrol->value.iec958.status[2] = (reg >> 16) & 0xff;
+	ucontrol->value.iec958.status[3] = (reg >> 24) & 0xff;
+	reg = img_spdif_in_readl(spdif, IMG_SPDIF_IN_CSH);
+	ucontrol->value.iec958.status[4] = (reg & IMG_SPDIF_IN_CSH_MASK)
+		>> IMG_SPDIF_IN_CSH_SHIFT;
+
+	return 0;
+}
+
+static int img_spdif_in_info_multi_freq(struct snd_kcontrol *kcontrol,
+		struct snd_ctl_elem_info *uinfo)
+{
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+	uinfo->count = IMG_SPDIF_IN_NUM_ACLKGEN;
+	uinfo->value.integer.min = 0;
+	uinfo->value.integer.max = LONG_MAX;
+
+	return 0;
+}
+
+static int img_spdif_in_get_multi_freq(struct snd_kcontrol *kcontrol,
+				  struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
+	struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(cpu_dai);
+	unsigned long flags;
+
+	spin_lock_irqsave(&spdif->lock, flags);
+	if (spdif->multi_freq) {
+		ucontrol->value.integer.value[0] = spdif->multi_freqs[0];
+		ucontrol->value.integer.value[1] = spdif->multi_freqs[1];
+		ucontrol->value.integer.value[2] = spdif->multi_freqs[2];
+		ucontrol->value.integer.value[3] = spdif->multi_freqs[3];
+	} else {
+		ucontrol->value.integer.value[0] = 0;
+		ucontrol->value.integer.value[1] = 0;
+		ucontrol->value.integer.value[2] = 0;
+		ucontrol->value.integer.value[3] = 0;
+	}
+	spin_unlock_irqrestore(&spdif->lock, flags);
+
+	return 0;
+}
+
+static int img_spdif_in_set_multi_freq(struct snd_kcontrol *kcontrol,
+				  struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
+	struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(cpu_dai);
+	unsigned int multi_freqs[IMG_SPDIF_IN_NUM_ACLKGEN];
+	bool multi_freq;
+	unsigned long flags;
+
+	if ((ucontrol->value.integer.value[0] == 0) &&
+			(ucontrol->value.integer.value[1] == 0) &&
+			(ucontrol->value.integer.value[2] == 0) &&
+			(ucontrol->value.integer.value[3] == 0)) {
+		multi_freq = false;
+	} else {
+		multi_freqs[0] = ucontrol->value.integer.value[0];
+		multi_freqs[1] = ucontrol->value.integer.value[1];
+		multi_freqs[2] = ucontrol->value.integer.value[2];
+		multi_freqs[3] = ucontrol->value.integer.value[3];
+		multi_freq = true;
+	}
+
+	if (multi_freq)
+		return img_spdif_in_do_clkgen_multi(spdif, multi_freqs);
+
+	spin_lock_irqsave(&spdif->lock, flags);
+
+	if (spdif->active) {
+		spin_unlock_irqrestore(&spdif->lock, flags);
+		return -EBUSY;
+	}
+
+	spdif->multi_freq = false;
+
+	spin_unlock_irqrestore(&spdif->lock, flags);
+
+	return 0;
+}
+
+static int img_spdif_in_info_lock_freq(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 = LONG_MAX;
+
+	return 0;
+}
+
+static int img_spdif_in_get_lock_freq(struct snd_kcontrol *kcontrol,
+				  struct snd_ctl_elem_value *uc)
+{
+	struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
+	struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(cpu_dai);
+	u32 reg;
+	int i;
+	unsigned long flags;
+
+	spin_lock_irqsave(&spdif->lock, flags);
+
+	reg = img_spdif_in_readl(spdif, IMG_SPDIF_IN_STATUS);
+	if (reg & IMG_SPDIF_IN_STATUS_LOCK_MASK) {
+		if (spdif->multi_freq) {
+			i = ((reg & IMG_SPDIF_IN_STATUS_SAM_MASK) >>
+					IMG_SPDIF_IN_STATUS_SAM_SHIFT) - 1;
+			uc->value.integer.value[0] = spdif->multi_freqs[i];
+		} else {
+			uc->value.integer.value[0] = spdif->single_freq;
+		}
+	} else {
+		uc->value.integer.value[0] = 0;
+	}
+
+	spin_unlock_irqrestore(&spdif->lock, flags);
+
+	return 0;
+}
+
+static int img_spdif_in_info_trk(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 = 255;
+
+	return 0;
+}
+
+static int img_spdif_in_get_trk(struct snd_kcontrol *kcontrol,
+				  struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
+	struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(cpu_dai);
+
+	ucontrol->value.integer.value[0] = spdif->trk;
+
+	return 0;
+}
+
+static int img_spdif_in_set_trk(struct snd_kcontrol *kcontrol,
+				  struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
+	struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(cpu_dai);
+	unsigned long flags;
+	int i;
+	u32 reg;
+
+	spin_lock_irqsave(&spdif->lock, flags);
+
+	if (spdif->active) {
+		spin_unlock_irqrestore(&spdif->lock, flags);
+		return -EBUSY;
+	}
+
+	spdif->trk = ucontrol->value.integer.value[0];
+
+	reg = img_spdif_in_readl(spdif, IMG_SPDIF_IN_CTL);
+	reg &= ~IMG_SPDIF_IN_CTL_TRK_MASK;
+	reg |= spdif->trk << IMG_SPDIF_IN_CTL_TRK_SHIFT;
+	img_spdif_in_writel(spdif, reg, IMG_SPDIF_IN_CTL);
+
+	for (i = 0; i < IMG_SPDIF_IN_NUM_ACLKGEN; i++) {
+		spdif->aclkgen_regs[i] = (spdif->aclkgen_regs[i] &
+			~IMG_SPDIF_IN_ACLKGEN_TRK_MASK) |
+			(spdif->trk << IMG_SPDIF_IN_ACLKGEN_TRK_SHIFT);
+
+		img_spdif_in_aclkgen_writel(spdif, i);
+	}
+
+	spin_unlock_irqrestore(&spdif->lock, flags);
+
+	return 0;
+}
+
+static int img_spdif_in_info_lock(struct snd_kcontrol *kcontrol,
+		struct snd_ctl_elem_info *uinfo)
+{
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+	uinfo->count = 1;
+	uinfo->value.integer.min = -128;
+	uinfo->value.integer.max = 127;
+
+	return 0;
+}
+
+static int img_spdif_in_get_lock_acquire(struct snd_kcontrol *kcontrol,
+				  struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
+	struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(cpu_dai);
+
+	ucontrol->value.integer.value[0] = spdif->lock_acquire;
+
+	return 0;
+}
+
+static int img_spdif_in_set_lock_acquire(struct snd_kcontrol *kcontrol,
+				  struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
+	struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(cpu_dai);
+	unsigned long flags;
+	u32 reg;
+
+	spin_lock_irqsave(&spdif->lock, flags);
+
+	if (spdif->active) {
+		spin_unlock_irqrestore(&spdif->lock, flags);
+		return -EBUSY;
+	}
+
+	spdif->lock_acquire = ucontrol->value.integer.value[0];
+
+	reg = img_spdif_in_readl(spdif, IMG_SPDIF_IN_CTL);
+	reg &= ~IMG_SPDIF_IN_CTL_LOCKHI_MASK;
+	reg |= (spdif->lock_acquire << IMG_SPDIF_IN_CTL_LOCKHI_SHIFT) &
+		IMG_SPDIF_IN_CTL_LOCKHI_MASK;
+	img_spdif_in_writel(spdif, reg, IMG_SPDIF_IN_CTL);
+
+	spin_unlock_irqrestore(&spdif->lock, flags);
+
+	return 0;
+}
+
+static int img_spdif_in_get_lock_release(struct snd_kcontrol *kcontrol,
+				  struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
+	struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(cpu_dai);
+
+	ucontrol->value.integer.value[0] = spdif->lock_release;
+
+	return 0;
+}
+
+static int img_spdif_in_set_lock_release(struct snd_kcontrol *kcontrol,
+				  struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
+	struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(cpu_dai);
+	unsigned long flags;
+	u32 reg;
+
+	spin_lock_irqsave(&spdif->lock, flags);
+
+	if (spdif->active) {
+		spin_unlock_irqrestore(&spdif->lock, flags);
+		return -EBUSY;
+	}
+
+	spdif->lock_release = ucontrol->value.integer.value[0];
+
+	reg = img_spdif_in_readl(spdif, IMG_SPDIF_IN_CTL);
+	reg &= ~IMG_SPDIF_IN_CTL_LOCKLO_MASK;
+	reg |= (spdif->lock_release << IMG_SPDIF_IN_CTL_LOCKLO_SHIFT) &
+		IMG_SPDIF_IN_CTL_LOCKLO_MASK;
+	img_spdif_in_writel(spdif, reg, IMG_SPDIF_IN_CTL);
+
+	spin_unlock_irqrestore(&spdif->lock, flags);
+
+	return 0;
+}
+
+static struct snd_kcontrol_new img_spdif_in_controls[] = {
+	{
+		.access = SNDRV_CTL_ELEM_ACCESS_READ,
+		.iface = SNDRV_CTL_ELEM_IFACE_PCM,
+		.name = SNDRV_CTL_NAME_IEC958("", CAPTURE, MASK),
+		.info = img_spdif_in_iec958_info,
+		.get = img_spdif_in_get_status_mask
+	},
+	{
+		.access = SNDRV_CTL_ELEM_ACCESS_READ |
+			SNDRV_CTL_ELEM_ACCESS_VOLATILE,
+		.iface = SNDRV_CTL_ELEM_IFACE_PCM,
+		.name = SNDRV_CTL_NAME_IEC958("", CAPTURE, DEFAULT),
+		.info = img_spdif_in_iec958_info,
+		.get = img_spdif_in_get_status
+	},
+	{
+		.iface = SNDRV_CTL_ELEM_IFACE_PCM,
+		.name = "SPDIF In Multi Frequency Acquire",
+		.info = img_spdif_in_info_multi_freq,
+		.get = img_spdif_in_get_multi_freq,
+		.put = img_spdif_in_set_multi_freq
+	},
+	{
+		.access = SNDRV_CTL_ELEM_ACCESS_READ |
+			SNDRV_CTL_ELEM_ACCESS_VOLATILE,
+		.iface = SNDRV_CTL_ELEM_IFACE_PCM,
+		.name = "SPDIF In Lock Frequency",
+		.info = img_spdif_in_info_lock_freq,
+		.get = img_spdif_in_get_lock_freq
+	},
+	{
+		.iface = SNDRV_CTL_ELEM_IFACE_PCM,
+		.name = "SPDIF In Lock TRK",
+		.info = img_spdif_in_info_trk,
+		.get = img_spdif_in_get_trk,
+		.put = img_spdif_in_set_trk
+	},
+	{
+		.iface = SNDRV_CTL_ELEM_IFACE_PCM,
+		.name = "SPDIF In Lock Acquire Threshold",
+		.info = img_spdif_in_info_lock,
+		.get = img_spdif_in_get_lock_acquire,
+		.put = img_spdif_in_set_lock_acquire
+	},
+	{
+		.iface = SNDRV_CTL_ELEM_IFACE_PCM,
+		.name = "SPDIF In Lock Release Threshold",
+		.info = img_spdif_in_info_lock,
+		.get = img_spdif_in_get_lock_release,
+		.put = img_spdif_in_set_lock_release
+	}
+};
+
+static int img_spdif_in_trigger(struct snd_pcm_substream *substream, int cmd,
+	struct snd_soc_dai *dai)
+{
+	unsigned long flags;
+	struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(dai);
+	int ret = 0;
+	u32 reg;
+
+	spin_lock_irqsave(&spdif->lock, flags);
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+	case SNDRV_PCM_TRIGGER_RESUME:
+	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+		reg = img_spdif_in_readl(spdif, IMG_SPDIF_IN_CTL);
+		if (spdif->multi_freq)
+			reg &= ~IMG_SPDIF_IN_CTL_SRD_MASK;
+		else
+			reg |= (1UL << IMG_SPDIF_IN_CTL_SRD_SHIFT);
+		reg |= IMG_SPDIF_IN_CTL_SRT_MASK;
+		img_spdif_in_writel(spdif, reg, IMG_SPDIF_IN_CTL);
+		spdif->active = true;
+		break;
+	case SNDRV_PCM_TRIGGER_STOP:
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+		reg = img_spdif_in_readl(spdif, IMG_SPDIF_IN_CTL);
+		reg &= ~IMG_SPDIF_IN_CTL_SRT_MASK;
+		img_spdif_in_writel(spdif, reg, IMG_SPDIF_IN_CTL);
+		spdif->active = false;
+		break;
+	default:
+		ret = -EINVAL;
+	}
+
+	spin_unlock_irqrestore(&spdif->lock, flags);
+
+	return ret;
+}
+
+static int img_spdif_in_hw_params(struct snd_pcm_substream *substream,
+	struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
+{
+	struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(dai);
+	unsigned int rate, channels;
+	snd_pcm_format_t format;
+
+	rate = params_rate(params);
+	channels = params_channels(params);
+	format = params_format(params);
+
+	if (format != SNDRV_PCM_FORMAT_S32_LE)
+		return -EINVAL;
+
+	if (channels != 2)
+		return -EINVAL;
+
+	return img_spdif_in_do_clkgen_single(spdif, rate);
+}
+
+static const struct snd_soc_dai_ops img_spdif_in_dai_ops = {
+	.trigger = img_spdif_in_trigger,
+	.hw_params = img_spdif_in_hw_params
+};
+
+static int img_spdif_in_dai_probe(struct snd_soc_dai *dai)
+{
+	struct img_spdif_in *spdif = snd_soc_dai_get_drvdata(dai);
+
+	snd_soc_dai_init_dma_data(dai, NULL, &spdif->dma_data);
+
+	snd_soc_add_dai_controls(dai, img_spdif_in_controls,
+			ARRAY_SIZE(img_spdif_in_controls));
+
+	return 0;
+}
+
+static struct snd_soc_dai_driver img_spdif_in_dai = {
+	.probe = img_spdif_in_dai_probe,
+	.capture = {
+		.channels_min = 2,
+		.channels_max = 2,
+		.rates = SNDRV_PCM_RATE_8000_192000,
+		.formats = SNDRV_PCM_FMTBIT_S32_LE
+	},
+	.ops = &img_spdif_in_dai_ops
+};
+
+static const struct snd_soc_component_driver img_spdif_in_component = {
+	.name = "img-spdif-in"
+};
+
+static int img_spdif_in_probe(struct platform_device *pdev)
+{
+	struct img_spdif_in *spdif;
+	struct resource *res;
+	void __iomem *base;
+	int ret;
+	struct reset_control *rst;
+	u32 reg;
+	struct device *dev = &pdev->dev;
+
+	spdif = devm_kzalloc(&pdev->dev, sizeof(*spdif), GFP_KERNEL);
+	if (!spdif)
+		return -ENOMEM;
+
+	platform_set_drvdata(pdev, spdif);
+
+	spdif->dev = &pdev->dev;
+
+	res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
+	base = devm_ioremap_resource(&pdev->dev, res);
+	if (IS_ERR(base))
+		return PTR_ERR(base);
+
+	spdif->base = base;
+
+	spdif->clk_sys = devm_clk_get(dev, "sys");
+	if (IS_ERR(spdif->clk_sys)) {
+		if (PTR_ERR(spdif->clk_sys) != -EPROBE_DEFER)
+			dev_err(dev, "Failed to acquire clock 'sys'\n");
+		return PTR_ERR(spdif->clk_sys);
+	}
+
+	ret = clk_prepare_enable(spdif->clk_sys);
+	if (ret)
+		return ret;
+
+	rst = devm_reset_control_get(&pdev->dev, "rst");
+	if (IS_ERR(rst)) {
+		if (PTR_ERR(rst) == -EPROBE_DEFER) {
+			ret = -EPROBE_DEFER;
+			goto err_clk_disable;
+		}
+		dev_dbg(dev, "No top level reset found\n");
+		img_spdif_in_writel(spdif, IMG_SPDIF_IN_SOFT_RESET_MASK,
+				IMG_SPDIF_IN_SOFT_RESET);
+		img_spdif_in_writel(spdif, 0, IMG_SPDIF_IN_SOFT_RESET);
+	} else {
+		reset_control_assert(rst);
+		reset_control_deassert(rst);
+	}
+
+	spin_lock_init(&spdif->lock);
+
+	spdif->dma_data.addr = res->start + IMG_SPDIF_IN_RX_FIFO_OFFSET;
+	spdif->dma_data.addr_width = 4;
+	spdif->dma_data.maxburst = 4;
+	spdif->trk = 0x80;
+	spdif->lock_acquire = 4;
+	spdif->lock_release = -128;
+
+	reg = (spdif->lock_acquire << IMG_SPDIF_IN_CTL_LOCKHI_SHIFT) &
+		IMG_SPDIF_IN_CTL_LOCKHI_MASK;
+	reg |= (spdif->lock_release << IMG_SPDIF_IN_CTL_LOCKLO_SHIFT) &
+		IMG_SPDIF_IN_CTL_LOCKLO_MASK;
+	reg |= (spdif->trk << IMG_SPDIF_IN_CTL_TRK_SHIFT) &
+		IMG_SPDIF_IN_CTL_TRK_MASK;
+	img_spdif_in_writel(spdif, reg, IMG_SPDIF_IN_CTL);
+
+	ret = devm_snd_soc_register_component(&pdev->dev,
+			&img_spdif_in_component, &img_spdif_in_dai, 1);
+	if (ret)
+		goto err_clk_disable;
+
+	ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
+	if (ret)
+		goto err_clk_disable;
+
+	return 0;
+
+err_clk_disable:
+	clk_disable_unprepare(spdif->clk_sys);
+
+	return ret;
+}
+
+static int img_spdif_in_dev_remove(struct platform_device *pdev)
+{
+	struct img_spdif_in *spdif = platform_get_drvdata(pdev);
+
+	clk_disable_unprepare(spdif->clk_sys);
+
+	return 0;
+}
+
+static const struct of_device_id img_spdif_in_of_match[] = {
+	{ .compatible = "img,spdif-in" },
+	{}
+};
+MODULE_DEVICE_TABLE(of, img_spdif_in_of_match);
+
+static struct platform_driver img_spdif_in_driver = {
+	.driver = {
+		.name = "img-spdif-in",
+		.of_match_table = img_spdif_in_of_match
+	},
+	.probe = img_spdif_in_probe,
+	.remove = img_spdif_in_dev_remove
+};
+module_platform_driver(img_spdif_in_driver);
+
+MODULE_AUTHOR("Damien Horsley <Damien.Horsley@imgtec.com>");
+MODULE_DESCRIPTION("IMG SPDIF Input driver");
+MODULE_LICENSE("GPL v2");