Adding upstream version 6.1.76.upstream/6.1.76

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 1388 insertions, 0 deletions

diff --git a/sound/soc/fsl/fsl_xcvr.c b/sound/soc/fsl/fsl_xcvr.c
new file mode 100644
index 000000000..c043efe45
--- /dev/null
+++ b/sound/soc/fsl/fsl_xcvr.c
@@ -0,0 +1,1388 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright 2019 NXP
+
+#include <linux/bitrev.h>
+#include <linux/clk.h>
+#include <linux/firmware.h>
+#include <linux/interrupt.h>
+#include <linux/module.h>
+#include <linux/of_platform.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/reset.h>
+#include <sound/dmaengine_pcm.h>
+#include <sound/pcm_iec958.h>
+#include <sound/pcm_params.h>
+
+#include "fsl_xcvr.h"
+#include "imx-pcm.h"
+
+#define FSL_XCVR_CAPDS_SIZE	256
+
+struct fsl_xcvr_soc_data {
+	const char *fw_name;
+};
+
+struct fsl_xcvr {
+	const struct fsl_xcvr_soc_data *soc_data;
+	struct platform_device *pdev;
+	struct regmap *regmap;
+	struct clk *ipg_clk;
+	struct clk *pll_ipg_clk;
+	struct clk *phy_clk;
+	struct clk *spba_clk;
+	struct reset_control *reset;
+	u8 streams;
+	u32 mode;
+	u32 arc_mode;
+	void __iomem *ram_addr;
+	struct snd_dmaengine_dai_dma_data dma_prms_rx;
+	struct snd_dmaengine_dai_dma_data dma_prms_tx;
+	struct snd_aes_iec958 rx_iec958;
+	struct snd_aes_iec958 tx_iec958;
+	u8 cap_ds[FSL_XCVR_CAPDS_SIZE];
+};
+
+static const struct fsl_xcvr_pll_conf {
+	u8 mfi;   /* min=0x18, max=0x38 */
+	u32 mfn;  /* signed int, 2's compl., min=0x3FFF0000, max=0x00010000 */
+	u32 mfd;  /* unsigned int */
+	u32 fout; /* Fout = Fref*(MFI + MFN/MFD), Fref is 24MHz */
+} fsl_xcvr_pll_cfg[] = {
+	{ .mfi = 54, .mfn = 1,  .mfd = 6,   .fout = 1300000000, }, /* 1.3 GHz */
+	{ .mfi = 32, .mfn = 96, .mfd = 125, .fout = 786432000, },  /* 8000 Hz */
+	{ .mfi = 30, .mfn = 66, .mfd = 625, .fout = 722534400, },  /* 11025 Hz */
+	{ .mfi = 29, .mfn = 1,  .mfd = 6,   .fout = 700000000, },  /* 700 MHz */
+};
+
+/*
+ * HDMI2.1 spec defines 6- and 12-channels layout for one bit audio
+ * stream. Todo: to check how this case can be considered below
+ */
+static const u32 fsl_xcvr_earc_channels[] = { 1, 2, 8, 16, 32, };
+static const struct snd_pcm_hw_constraint_list fsl_xcvr_earc_channels_constr = {
+	.count = ARRAY_SIZE(fsl_xcvr_earc_channels),
+	.list = fsl_xcvr_earc_channels,
+};
+
+static const u32 fsl_xcvr_earc_rates[] = {
+	32000, 44100, 48000, 64000, 88200, 96000,
+	128000, 176400, 192000, 256000, 352800, 384000,
+	512000, 705600, 768000, 1024000, 1411200, 1536000,
+};
+static const struct snd_pcm_hw_constraint_list fsl_xcvr_earc_rates_constr = {
+	.count = ARRAY_SIZE(fsl_xcvr_earc_rates),
+	.list = fsl_xcvr_earc_rates,
+};
+
+static const u32 fsl_xcvr_spdif_channels[] = { 2, };
+static const struct snd_pcm_hw_constraint_list fsl_xcvr_spdif_channels_constr = {
+	.count = ARRAY_SIZE(fsl_xcvr_spdif_channels),
+	.list = fsl_xcvr_spdif_channels,
+};
+
+static const u32 fsl_xcvr_spdif_rates[] = {
+	32000, 44100, 48000, 88200, 96000, 176400, 192000,
+};
+static const struct snd_pcm_hw_constraint_list fsl_xcvr_spdif_rates_constr = {
+	.count = ARRAY_SIZE(fsl_xcvr_spdif_rates),
+	.list = fsl_xcvr_spdif_rates,
+};
+
+static int fsl_xcvr_arc_mode_put(struct snd_kcontrol *kcontrol,
+				 struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
+	struct fsl_xcvr *xcvr = snd_soc_dai_get_drvdata(dai);
+	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
+	unsigned int *item = ucontrol->value.enumerated.item;
+
+	xcvr->arc_mode = snd_soc_enum_item_to_val(e, item[0]);
+
+	return 0;
+}
+
+static int fsl_xcvr_arc_mode_get(struct snd_kcontrol *kcontrol,
+				 struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
+	struct fsl_xcvr *xcvr = snd_soc_dai_get_drvdata(dai);
+
+	ucontrol->value.enumerated.item[0] = xcvr->arc_mode;
+
+	return 0;
+}
+
+static const u32 fsl_xcvr_phy_arc_cfg[] = {
+	FSL_XCVR_PHY_CTRL_ARC_MODE_SE_EN, FSL_XCVR_PHY_CTRL_ARC_MODE_CM_EN,
+};
+
+static const char * const fsl_xcvr_arc_mode[] = { "Single Ended", "Common", };
+static const struct soc_enum fsl_xcvr_arc_mode_enum =
+	SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(fsl_xcvr_arc_mode), fsl_xcvr_arc_mode);
+static struct snd_kcontrol_new fsl_xcvr_arc_mode_kctl =
+	SOC_ENUM_EXT("ARC Mode", fsl_xcvr_arc_mode_enum,
+		     fsl_xcvr_arc_mode_get, fsl_xcvr_arc_mode_put);
+
+/* Capabilities data structure, bytes */
+static int fsl_xcvr_type_capds_bytes_info(struct snd_kcontrol *kcontrol,
+					  struct snd_ctl_elem_info *uinfo)
+{
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
+	uinfo->count = FSL_XCVR_CAPDS_SIZE;
+
+	return 0;
+}
+
+static int fsl_xcvr_capds_get(struct snd_kcontrol *kcontrol,
+			      struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
+	struct fsl_xcvr *xcvr = snd_soc_dai_get_drvdata(dai);
+
+	memcpy(ucontrol->value.bytes.data, xcvr->cap_ds, FSL_XCVR_CAPDS_SIZE);
+
+	return 0;
+}
+
+static int fsl_xcvr_capds_put(struct snd_kcontrol *kcontrol,
+			      struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
+	struct fsl_xcvr *xcvr = snd_soc_dai_get_drvdata(dai);
+
+	memcpy(xcvr->cap_ds, ucontrol->value.bytes.data, FSL_XCVR_CAPDS_SIZE);
+
+	return 0;
+}
+
+static struct snd_kcontrol_new fsl_xcvr_earc_capds_kctl = {
+	.iface = SNDRV_CTL_ELEM_IFACE_PCM,
+	.name = "Capabilities Data Structure",
+	.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
+	.info = fsl_xcvr_type_capds_bytes_info,
+	.get = fsl_xcvr_capds_get,
+	.put = fsl_xcvr_capds_put,
+};
+
+static int fsl_xcvr_activate_ctl(struct snd_soc_dai *dai, const char *name,
+				 bool active)
+{
+	struct snd_soc_card *card = dai->component->card;
+	struct snd_kcontrol *kctl;
+	bool enabled;
+
+	kctl = snd_soc_card_get_kcontrol(card, name);
+	if (kctl == NULL)
+		return -ENOENT;
+
+	enabled = ((kctl->vd[0].access & SNDRV_CTL_ELEM_ACCESS_WRITE) != 0);
+	if (active == enabled)
+		return 0; /* nothing to do */
+
+	if (active)
+		kctl->vd[0].access |=  SNDRV_CTL_ELEM_ACCESS_WRITE;
+	else
+		kctl->vd[0].access &= ~SNDRV_CTL_ELEM_ACCESS_WRITE;
+
+	snd_ctl_notify(card->snd_card, SNDRV_CTL_EVENT_MASK_INFO, &kctl->id);
+
+	return 1;
+}
+
+static int fsl_xcvr_mode_put(struct snd_kcontrol *kcontrol,
+			     struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
+	struct fsl_xcvr *xcvr = snd_soc_dai_get_drvdata(dai);
+	struct soc_enum *e = (struct soc_enum *)kcontrol->private_value;
+	unsigned int *item = ucontrol->value.enumerated.item;
+	struct snd_soc_card *card = dai->component->card;
+	struct snd_soc_pcm_runtime *rtd;
+
+	xcvr->mode = snd_soc_enum_item_to_val(e, item[0]);
+
+	fsl_xcvr_activate_ctl(dai, fsl_xcvr_arc_mode_kctl.name,
+			      (xcvr->mode == FSL_XCVR_MODE_ARC));
+	fsl_xcvr_activate_ctl(dai, fsl_xcvr_earc_capds_kctl.name,
+			      (xcvr->mode == FSL_XCVR_MODE_EARC));
+	/* Allow playback for SPDIF only */
+	rtd = snd_soc_get_pcm_runtime(card, card->dai_link);
+	rtd->pcm->streams[SNDRV_PCM_STREAM_PLAYBACK].substream_count =
+		(xcvr->mode == FSL_XCVR_MODE_SPDIF ? 1 : 0);
+	return 0;
+}
+
+static int fsl_xcvr_mode_get(struct snd_kcontrol *kcontrol,
+			     struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
+	struct fsl_xcvr *xcvr = snd_soc_dai_get_drvdata(dai);
+
+	ucontrol->value.enumerated.item[0] = xcvr->mode;
+
+	return 0;
+}
+
+static const char * const fsl_xcvr_mode[] = { "SPDIF", "ARC RX", "eARC", };
+static const struct soc_enum fsl_xcvr_mode_enum =
+	SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(fsl_xcvr_mode), fsl_xcvr_mode);
+static struct snd_kcontrol_new fsl_xcvr_mode_kctl =
+	SOC_ENUM_EXT("XCVR Mode", fsl_xcvr_mode_enum,
+		     fsl_xcvr_mode_get, fsl_xcvr_mode_put);
+
+/** phy: true => phy, false => pll */
+static int fsl_xcvr_ai_write(struct fsl_xcvr *xcvr, u8 reg, u32 data, bool phy)
+{
+	struct device *dev = &xcvr->pdev->dev;
+	u32 val, idx, tidx;
+	int ret;
+
+	idx  = BIT(phy ? 26 : 24);
+	tidx = BIT(phy ? 27 : 25);
+
+	regmap_write(xcvr->regmap, FSL_XCVR_PHY_AI_CTRL_CLR, 0xFF);
+	regmap_write(xcvr->regmap, FSL_XCVR_PHY_AI_CTRL_SET, reg);
+	regmap_write(xcvr->regmap, FSL_XCVR_PHY_AI_WDATA, data);
+	regmap_write(xcvr->regmap, FSL_XCVR_PHY_AI_CTRL_TOG, idx);
+
+	ret = regmap_read_poll_timeout(xcvr->regmap, FSL_XCVR_PHY_AI_CTRL, val,
+				       (val & idx) == ((val & tidx) >> 1),
+				       10, 10000);
+	if (ret)
+		dev_err(dev, "AI timeout: failed to set %s reg 0x%02x=0x%08x\n",
+			phy ? "PHY" : "PLL", reg, data);
+	return ret;
+}
+
+static int fsl_xcvr_en_phy_pll(struct fsl_xcvr *xcvr, u32 freq, bool tx)
+{
+	struct device *dev = &xcvr->pdev->dev;
+	u32 i, div = 0, log2;
+	int ret;
+
+	for (i = 0; i < ARRAY_SIZE(fsl_xcvr_pll_cfg); i++) {
+		if (fsl_xcvr_pll_cfg[i].fout % freq == 0) {
+			div = fsl_xcvr_pll_cfg[i].fout / freq;
+			break;
+		}
+	}
+
+	if (!div || i >= ARRAY_SIZE(fsl_xcvr_pll_cfg))
+		return -EINVAL;
+
+	log2 = ilog2(div);
+
+	/* Release AI interface from reset */
+	ret = regmap_write(xcvr->regmap, FSL_XCVR_PHY_AI_CTRL_SET,
+			   FSL_XCVR_PHY_AI_CTRL_AI_RESETN);
+	if (ret < 0) {
+		dev_err(dev, "Error while setting IER0: %d\n", ret);
+		return ret;
+	}
+
+	/* PLL: BANDGAP_SET: EN_VBG (enable bandgap) */
+	fsl_xcvr_ai_write(xcvr, FSL_XCVR_PLL_BANDGAP_SET,
+			  FSL_XCVR_PLL_BANDGAP_EN_VBG, 0);
+
+	/* PLL: CTRL0: DIV_INTEGER */
+	fsl_xcvr_ai_write(xcvr, FSL_XCVR_PLL_CTRL0, fsl_xcvr_pll_cfg[i].mfi, 0);
+	/* PLL: NUMERATOR: MFN */
+	fsl_xcvr_ai_write(xcvr, FSL_XCVR_PLL_NUM, fsl_xcvr_pll_cfg[i].mfn, 0);
+	/* PLL: DENOMINATOR: MFD */
+	fsl_xcvr_ai_write(xcvr, FSL_XCVR_PLL_DEN, fsl_xcvr_pll_cfg[i].mfd, 0);
+	/* PLL: CTRL0_SET: HOLD_RING_OFF, POWER_UP */
+	fsl_xcvr_ai_write(xcvr, FSL_XCVR_PLL_CTRL0_SET,
+			  FSL_XCVR_PLL_CTRL0_HROFF | FSL_XCVR_PLL_CTRL0_PWP, 0);
+	udelay(25);
+	/* PLL: CTRL0: Clear Hold Ring Off */
+	fsl_xcvr_ai_write(xcvr, FSL_XCVR_PLL_CTRL0_CLR,
+			  FSL_XCVR_PLL_CTRL0_HROFF, 0);
+	udelay(100);
+	if (tx) { /* TX is enabled for SPDIF only */
+		/* PLL: POSTDIV: PDIV0 */
+		fsl_xcvr_ai_write(xcvr, FSL_XCVR_PLL_PDIV,
+				  FSL_XCVR_PLL_PDIVx(log2, 0), 0);
+		/* PLL: CTRL_SET: CLKMUX0_EN */
+		fsl_xcvr_ai_write(xcvr, FSL_XCVR_PLL_CTRL0_SET,
+				  FSL_XCVR_PLL_CTRL0_CM0_EN, 0);
+	} else if (xcvr->mode == FSL_XCVR_MODE_EARC) { /* eARC RX */
+		/* PLL: POSTDIV: PDIV1 */
+		fsl_xcvr_ai_write(xcvr, FSL_XCVR_PLL_PDIV,
+				  FSL_XCVR_PLL_PDIVx(log2, 1), 0);
+		/* PLL: CTRL_SET: CLKMUX1_EN */
+		fsl_xcvr_ai_write(xcvr, FSL_XCVR_PLL_CTRL0_SET,
+				  FSL_XCVR_PLL_CTRL0_CM1_EN, 0);
+	} else { /* SPDIF / ARC RX */
+		/* PLL: POSTDIV: PDIV2 */
+		fsl_xcvr_ai_write(xcvr, FSL_XCVR_PLL_PDIV,
+				  FSL_XCVR_PLL_PDIVx(log2, 2), 0);
+		/* PLL: CTRL_SET: CLKMUX2_EN */
+		fsl_xcvr_ai_write(xcvr, FSL_XCVR_PLL_CTRL0_SET,
+				  FSL_XCVR_PLL_CTRL0_CM2_EN, 0);
+	}
+
+	if (xcvr->mode == FSL_XCVR_MODE_EARC) { /* eARC mode */
+		/* PHY: CTRL_SET: TX_DIFF_OE, PHY_EN */
+		fsl_xcvr_ai_write(xcvr, FSL_XCVR_PHY_CTRL_SET,
+				  FSL_XCVR_PHY_CTRL_TSDIFF_OE |
+				  FSL_XCVR_PHY_CTRL_PHY_EN, 1);
+		/* PHY: CTRL2_SET: EARC_TX_MODE */
+		fsl_xcvr_ai_write(xcvr, FSL_XCVR_PHY_CTRL2_SET,
+				  FSL_XCVR_PHY_CTRL2_EARC_TXMS, 1);
+	} else if (!tx) { /* SPDIF / ARC RX mode */
+		if (xcvr->mode == FSL_XCVR_MODE_SPDIF)
+			/* PHY: CTRL_SET: SPDIF_EN */
+			fsl_xcvr_ai_write(xcvr, FSL_XCVR_PHY_CTRL_SET,
+					  FSL_XCVR_PHY_CTRL_SPDIF_EN, 1);
+		else	/* PHY: CTRL_SET: ARC RX setup */
+			fsl_xcvr_ai_write(xcvr, FSL_XCVR_PHY_CTRL_SET,
+					  FSL_XCVR_PHY_CTRL_PHY_EN |
+					  FSL_XCVR_PHY_CTRL_RX_CM_EN |
+					  fsl_xcvr_phy_arc_cfg[xcvr->arc_mode], 1);
+	}
+
+	dev_dbg(dev, "PLL Fexp: %u, Fout: %u, mfi: %u, mfn: %u, mfd: %d, div: %u, pdiv0: %u\n",
+		freq, fsl_xcvr_pll_cfg[i].fout, fsl_xcvr_pll_cfg[i].mfi,
+		fsl_xcvr_pll_cfg[i].mfn, fsl_xcvr_pll_cfg[i].mfd, div, log2);
+	return 0;
+}
+
+static int fsl_xcvr_en_aud_pll(struct fsl_xcvr *xcvr, u32 freq)
+{
+	struct device *dev = &xcvr->pdev->dev;
+	int ret;
+
+	clk_disable_unprepare(xcvr->phy_clk);
+	ret = clk_set_rate(xcvr->phy_clk, freq);
+	if (ret < 0) {
+		dev_err(dev, "Error while setting AUD PLL rate: %d\n", ret);
+		return ret;
+	}
+	ret = clk_prepare_enable(xcvr->phy_clk);
+	if (ret) {
+		dev_err(dev, "failed to start PHY clock: %d\n", ret);
+		return ret;
+	}
+
+	/* Release AI interface from reset */
+	ret = regmap_write(xcvr->regmap, FSL_XCVR_PHY_AI_CTRL_SET,
+			   FSL_XCVR_PHY_AI_CTRL_AI_RESETN);
+	if (ret < 0) {
+		dev_err(dev, "Error while setting IER0: %d\n", ret);
+		return ret;
+	}
+
+	if (xcvr->mode == FSL_XCVR_MODE_EARC) { /* eARC mode */
+		/* PHY: CTRL_SET: TX_DIFF_OE, PHY_EN */
+		fsl_xcvr_ai_write(xcvr, FSL_XCVR_PHY_CTRL_SET,
+				  FSL_XCVR_PHY_CTRL_TSDIFF_OE |
+				  FSL_XCVR_PHY_CTRL_PHY_EN, 1);
+		/* PHY: CTRL2_SET: EARC_TX_MODE */
+		fsl_xcvr_ai_write(xcvr, FSL_XCVR_PHY_CTRL2_SET,
+				  FSL_XCVR_PHY_CTRL2_EARC_TXMS, 1);
+	} else { /* SPDIF mode */
+		/* PHY: CTRL_SET: TX_CLK_AUD_SS | SPDIF_EN */
+		fsl_xcvr_ai_write(xcvr, FSL_XCVR_PHY_CTRL_SET,
+				  FSL_XCVR_PHY_CTRL_TX_CLK_AUD_SS |
+				  FSL_XCVR_PHY_CTRL_SPDIF_EN, 1);
+	}
+
+	dev_dbg(dev, "PLL Fexp: %u\n", freq);
+
+	return 0;
+}
+
+#define FSL_XCVR_SPDIF_RX_FREQ	175000000
+static int fsl_xcvr_prepare(struct snd_pcm_substream *substream,
+			    struct snd_soc_dai *dai)
+{
+	struct fsl_xcvr *xcvr = snd_soc_dai_get_drvdata(dai);
+	bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
+	u32 m_ctl = 0, v_ctl = 0;
+	u32 r = substream->runtime->rate, ch = substream->runtime->channels;
+	u32 fout = 32 * r * ch * 10 * 2;
+	int ret = 0;
+
+	switch (xcvr->mode) {
+	case FSL_XCVR_MODE_SPDIF:
+	case FSL_XCVR_MODE_ARC:
+		if (tx) {
+			ret = fsl_xcvr_en_aud_pll(xcvr, fout);
+			if (ret < 0) {
+				dev_err(dai->dev, "Failed to set TX freq %u: %d\n",
+					fout, ret);
+				return ret;
+			}
+
+			ret = regmap_write(xcvr->regmap, FSL_XCVR_TX_DPTH_CTRL_SET,
+					   FSL_XCVR_TX_DPTH_CTRL_FRM_FMT);
+			if (ret < 0) {
+				dev_err(dai->dev, "Failed to set TX_DPTH: %d\n", ret);
+				return ret;
+			}
+
+			/**
+			 * set SPDIF MODE - this flag is used to gate
+			 * SPDIF output, useless for SPDIF RX
+			 */
+			m_ctl |= FSL_XCVR_EXT_CTRL_SPDIF_MODE;
+			v_ctl |= FSL_XCVR_EXT_CTRL_SPDIF_MODE;
+		} else {
+			/**
+			 * Clear RX FIFO, flip RX FIFO bits,
+			 * disable eARC related HW mode detects
+			 */
+			ret = regmap_write(xcvr->regmap, FSL_XCVR_RX_DPTH_CTRL_SET,
+					   FSL_XCVR_RX_DPTH_CTRL_STORE_FMT |
+					   FSL_XCVR_RX_DPTH_CTRL_CLR_RX_FIFO |
+					   FSL_XCVR_RX_DPTH_CTRL_COMP |
+					   FSL_XCVR_RX_DPTH_CTRL_LAYB_CTRL);
+			if (ret < 0) {
+				dev_err(dai->dev, "Failed to set RX_DPTH: %d\n", ret);
+				return ret;
+			}
+
+			ret = fsl_xcvr_en_phy_pll(xcvr, FSL_XCVR_SPDIF_RX_FREQ, tx);
+			if (ret < 0) {
+				dev_err(dai->dev, "Failed to set RX freq %u: %d\n",
+					FSL_XCVR_SPDIF_RX_FREQ, ret);
+				return ret;
+			}
+		}
+		break;
+	case FSL_XCVR_MODE_EARC:
+		if (!tx) {
+			/** Clear RX FIFO, flip RX FIFO bits */
+			ret = regmap_write(xcvr->regmap, FSL_XCVR_RX_DPTH_CTRL_SET,
+					   FSL_XCVR_RX_DPTH_CTRL_STORE_FMT |
+					   FSL_XCVR_RX_DPTH_CTRL_CLR_RX_FIFO);
+			if (ret < 0) {
+				dev_err(dai->dev, "Failed to set RX_DPTH: %d\n", ret);
+				return ret;
+			}
+
+			/** Enable eARC related HW mode detects */
+			ret = regmap_write(xcvr->regmap, FSL_XCVR_RX_DPTH_CTRL_CLR,
+					   FSL_XCVR_RX_DPTH_CTRL_COMP |
+					   FSL_XCVR_RX_DPTH_CTRL_LAYB_CTRL);
+			if (ret < 0) {
+				dev_err(dai->dev, "Failed to clr TX_DPTH: %d\n", ret);
+				return ret;
+			}
+		}
+
+		/* clear CMDC RESET */
+		m_ctl |= FSL_XCVR_EXT_CTRL_CMDC_RESET(tx);
+		/* set TX_RX_MODE */
+		m_ctl |= FSL_XCVR_EXT_CTRL_TX_RX_MODE;
+		v_ctl |= (tx ? FSL_XCVR_EXT_CTRL_TX_RX_MODE : 0);
+		break;
+	}
+
+	ret = regmap_update_bits(xcvr->regmap, FSL_XCVR_EXT_IER0,
+				 FSL_XCVR_IRQ_EARC_ALL, FSL_XCVR_IRQ_EARC_ALL);
+	if (ret < 0) {
+		dev_err(dai->dev, "Error while setting IER0: %d\n", ret);
+		return ret;
+	}
+
+	/* set DPATH RESET */
+	m_ctl |= FSL_XCVR_EXT_CTRL_DPTH_RESET(tx);
+	v_ctl |= FSL_XCVR_EXT_CTRL_DPTH_RESET(tx);
+	ret = regmap_update_bits(xcvr->regmap, FSL_XCVR_EXT_CTRL, m_ctl, v_ctl);
+	if (ret < 0) {
+		dev_err(dai->dev, "Error while setting EXT_CTRL: %d\n", ret);
+		return ret;
+	}
+
+	return 0;
+}
+
+static int fsl_xcvr_constr(const struct snd_pcm_substream *substream,
+			   const struct snd_pcm_hw_constraint_list *channels,
+			   const struct snd_pcm_hw_constraint_list *rates)
+{
+	struct snd_pcm_runtime *rt = substream->runtime;
+	int ret;
+
+	ret = snd_pcm_hw_constraint_list(rt, 0, SNDRV_PCM_HW_PARAM_CHANNELS,
+					 channels);
+	if (ret < 0)
+		return ret;
+
+	ret = snd_pcm_hw_constraint_list(rt, 0, SNDRV_PCM_HW_PARAM_RATE,
+					 rates);
+	if (ret < 0)
+		return ret;
+
+	return 0;
+}
+
+static int fsl_xcvr_startup(struct snd_pcm_substream *substream,
+			    struct snd_soc_dai *dai)
+{
+	struct fsl_xcvr *xcvr = snd_soc_dai_get_drvdata(dai);
+	bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
+	int ret = 0;
+
+	if (xcvr->streams & BIT(substream->stream)) {
+		dev_err(dai->dev, "%sX busy\n", tx ? "T" : "R");
+		return -EBUSY;
+	}
+
+	switch (xcvr->mode) {
+	case FSL_XCVR_MODE_SPDIF:
+	case FSL_XCVR_MODE_ARC:
+		ret = fsl_xcvr_constr(substream, &fsl_xcvr_spdif_channels_constr,
+				      &fsl_xcvr_spdif_rates_constr);
+		break;
+	case FSL_XCVR_MODE_EARC:
+		ret = fsl_xcvr_constr(substream, &fsl_xcvr_earc_channels_constr,
+				      &fsl_xcvr_earc_rates_constr);
+		break;
+	}
+	if (ret < 0)
+		return ret;
+
+	xcvr->streams |= BIT(substream->stream);
+
+	/* Disable XCVR controls if there is stream started */
+	fsl_xcvr_activate_ctl(dai, fsl_xcvr_mode_kctl.name, false);
+	fsl_xcvr_activate_ctl(dai, fsl_xcvr_arc_mode_kctl.name, false);
+	fsl_xcvr_activate_ctl(dai, fsl_xcvr_earc_capds_kctl.name, false);
+
+	return 0;
+}
+
+static void fsl_xcvr_shutdown(struct snd_pcm_substream *substream,
+			      struct snd_soc_dai *dai)
+{
+	struct fsl_xcvr *xcvr = snd_soc_dai_get_drvdata(dai);
+	bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
+	u32 mask = 0, val = 0;
+	int ret;
+
+	xcvr->streams &= ~BIT(substream->stream);
+
+	/* Enable XCVR controls if there is no stream started */
+	if (!xcvr->streams) {
+		fsl_xcvr_activate_ctl(dai, fsl_xcvr_mode_kctl.name, true);
+		fsl_xcvr_activate_ctl(dai, fsl_xcvr_arc_mode_kctl.name,
+				      (xcvr->mode == FSL_XCVR_MODE_ARC));
+		fsl_xcvr_activate_ctl(dai, fsl_xcvr_earc_capds_kctl.name,
+				      (xcvr->mode == FSL_XCVR_MODE_EARC));
+
+		ret = regmap_update_bits(xcvr->regmap, FSL_XCVR_EXT_IER0,
+					 FSL_XCVR_IRQ_EARC_ALL, 0);
+		if (ret < 0) {
+			dev_err(dai->dev, "Failed to set IER0: %d\n", ret);
+			return;
+		}
+
+		/* clear SPDIF MODE */
+		if (xcvr->mode == FSL_XCVR_MODE_SPDIF)
+			mask |= FSL_XCVR_EXT_CTRL_SPDIF_MODE;
+	}
+
+	if (xcvr->mode == FSL_XCVR_MODE_EARC) {
+		/* set CMDC RESET */
+		mask |= FSL_XCVR_EXT_CTRL_CMDC_RESET(tx);
+		val  |= FSL_XCVR_EXT_CTRL_CMDC_RESET(tx);
+	}
+
+	ret = regmap_update_bits(xcvr->regmap, FSL_XCVR_EXT_CTRL, mask, val);
+	if (ret < 0) {
+		dev_err(dai->dev, "Err setting DPATH RESET: %d\n", ret);
+		return;
+	}
+}
+
+static int fsl_xcvr_trigger(struct snd_pcm_substream *substream, int cmd,
+			    struct snd_soc_dai *dai)
+{
+	struct fsl_xcvr *xcvr = snd_soc_dai_get_drvdata(dai);
+	bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
+	int ret;
+
+	switch (cmd) {
+	case SNDRV_PCM_TRIGGER_START:
+	case SNDRV_PCM_TRIGGER_RESUME:
+	case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+		if (tx) {
+			switch (xcvr->mode) {
+			case FSL_XCVR_MODE_EARC:
+				/* set isr_cmdc_tx_en, w1c */
+				ret = regmap_write(xcvr->regmap,
+						   FSL_XCVR_ISR_SET,
+						   FSL_XCVR_ISR_CMDC_TX_EN);
+				if (ret < 0) {
+					dev_err(dai->dev, "err updating isr %d\n", ret);
+					return ret;
+				}
+				fallthrough;
+			case FSL_XCVR_MODE_SPDIF:
+				ret = regmap_write(xcvr->regmap,
+					 FSL_XCVR_TX_DPTH_CTRL_SET,
+					 FSL_XCVR_TX_DPTH_CTRL_STRT_DATA_TX);
+				if (ret < 0) {
+					dev_err(dai->dev, "Failed to start DATA_TX: %d\n", ret);
+					return ret;
+				}
+				break;
+			}
+		}
+
+		/* enable DMA RD/WR */
+		ret = regmap_update_bits(xcvr->regmap, FSL_XCVR_EXT_CTRL,
+					 FSL_XCVR_EXT_CTRL_DMA_DIS(tx), 0);
+		if (ret < 0) {
+			dev_err(dai->dev, "Failed to enable DMA: %d\n", ret);
+			return ret;
+		}
+
+		/* clear DPATH RESET */
+		ret = regmap_update_bits(xcvr->regmap, FSL_XCVR_EXT_CTRL,
+					 FSL_XCVR_EXT_CTRL_DPTH_RESET(tx),
+					 0);
+		if (ret < 0) {
+			dev_err(dai->dev, "Failed to clear DPATH RESET: %d\n", ret);
+			return ret;
+		}
+
+		break;
+	case SNDRV_PCM_TRIGGER_STOP:
+	case SNDRV_PCM_TRIGGER_SUSPEND:
+	case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+		/* disable DMA RD/WR */
+		ret = regmap_update_bits(xcvr->regmap, FSL_XCVR_EXT_CTRL,
+					 FSL_XCVR_EXT_CTRL_DMA_DIS(tx),
+					 FSL_XCVR_EXT_CTRL_DMA_DIS(tx));
+		if (ret < 0) {
+			dev_err(dai->dev, "Failed to disable DMA: %d\n", ret);
+			return ret;
+		}
+
+		if (tx) {
+			switch (xcvr->mode) {
+			case FSL_XCVR_MODE_SPDIF:
+				ret = regmap_write(xcvr->regmap,
+					 FSL_XCVR_TX_DPTH_CTRL_CLR,
+					 FSL_XCVR_TX_DPTH_CTRL_STRT_DATA_TX);
+				if (ret < 0) {
+					dev_err(dai->dev, "Failed to stop DATA_TX: %d\n", ret);
+					return ret;
+				}
+				fallthrough;
+			case FSL_XCVR_MODE_EARC:
+				/* clear ISR_CMDC_TX_EN, W1C */
+				ret = regmap_write(xcvr->regmap,
+						   FSL_XCVR_ISR_CLR,
+						   FSL_XCVR_ISR_CMDC_TX_EN);
+				if (ret < 0) {
+					dev_err(dai->dev,
+						"Err updating ISR %d\n", ret);
+					return ret;
+				}
+				break;
+			}
+		}
+		break;
+	default:
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int fsl_xcvr_load_firmware(struct fsl_xcvr *xcvr)
+{
+	struct device *dev = &xcvr->pdev->dev;
+	const struct firmware *fw;
+	int ret = 0, rem, off, out, page = 0, size = FSL_XCVR_REG_OFFSET;
+	u32 mask, val;
+
+	ret = request_firmware(&fw, xcvr->soc_data->fw_name, dev);
+	if (ret) {
+		dev_err(dev, "failed to request firmware.\n");
+		return ret;
+	}
+
+	rem = fw->size;
+
+	/* RAM is 20KiB = 16KiB code + 4KiB data => max 10 pages 2KiB each */
+	if (rem > 16384) {
+		dev_err(dev, "FW size %d is bigger than 16KiB.\n", rem);
+		release_firmware(fw);
+		return -ENOMEM;
+	}
+
+	for (page = 0; page < 10; page++) {
+		ret = regmap_update_bits(xcvr->regmap, FSL_XCVR_EXT_CTRL,
+					 FSL_XCVR_EXT_CTRL_PAGE_MASK,
+					 FSL_XCVR_EXT_CTRL_PAGE(page));
+		if (ret < 0) {
+			dev_err(dev, "FW: failed to set page %d, err=%d\n",
+				page, ret);
+			goto err_firmware;
+		}
+
+		off = page * size;
+		out = min(rem, size);
+		/* IPG clock is assumed to be running, otherwise it will hang */
+		if (out > 0) {
+			/* write firmware into code memory */
+			memcpy_toio(xcvr->ram_addr, fw->data + off, out);
+			rem -= out;
+			if (rem == 0) {
+				/* last part of firmware written */
+				/* clean remaining part of code memory page */
+				memset_io(xcvr->ram_addr + out, 0, size - out);
+			}
+		} else {
+			/* clean current page, including data memory */
+			memset_io(xcvr->ram_addr, 0, size);
+		}
+	}
+
+err_firmware:
+	release_firmware(fw);
+	if (ret < 0)
+		return ret;
+
+	/* configure watermarks */
+	mask = FSL_XCVR_EXT_CTRL_RX_FWM_MASK | FSL_XCVR_EXT_CTRL_TX_FWM_MASK;
+	val  = FSL_XCVR_EXT_CTRL_RX_FWM(FSL_XCVR_FIFO_WMK_RX);
+	val |= FSL_XCVR_EXT_CTRL_TX_FWM(FSL_XCVR_FIFO_WMK_TX);
+	/* disable DMA RD/WR */
+	mask |= FSL_XCVR_EXT_CTRL_DMA_RD_DIS | FSL_XCVR_EXT_CTRL_DMA_WR_DIS;
+	val  |= FSL_XCVR_EXT_CTRL_DMA_RD_DIS | FSL_XCVR_EXT_CTRL_DMA_WR_DIS;
+	/* Data RAM is 4KiB, last two pages: 8 and 9. Select page 8. */
+	mask |= FSL_XCVR_EXT_CTRL_PAGE_MASK;
+	val  |= FSL_XCVR_EXT_CTRL_PAGE(8);
+
+	ret = regmap_update_bits(xcvr->regmap, FSL_XCVR_EXT_CTRL, mask, val);
+	if (ret < 0) {
+		dev_err(dev, "Failed to set watermarks: %d\n", ret);
+		return ret;
+	}
+
+	/* Store Capabilities Data Structure into Data RAM */
+	memcpy_toio(xcvr->ram_addr + FSL_XCVR_CAP_DATA_STR, xcvr->cap_ds,
+		    FSL_XCVR_CAPDS_SIZE);
+	return 0;
+}
+
+static int fsl_xcvr_type_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 fsl_xcvr_type_iec958_bytes_info(struct snd_kcontrol *kcontrol,
+					   struct snd_ctl_elem_info *uinfo)
+{
+	uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
+	uinfo->count = sizeof_field(struct snd_aes_iec958, status);
+
+	return 0;
+}
+
+static int fsl_xcvr_rx_cs_get(struct snd_kcontrol *kcontrol,
+			      struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
+	struct fsl_xcvr *xcvr = snd_soc_dai_get_drvdata(dai);
+
+	memcpy(ucontrol->value.iec958.status, xcvr->rx_iec958.status, 24);
+
+	return 0;
+}
+
+static int fsl_xcvr_tx_cs_get(struct snd_kcontrol *kcontrol,
+			      struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
+	struct fsl_xcvr *xcvr = snd_soc_dai_get_drvdata(dai);
+
+	memcpy(ucontrol->value.iec958.status, xcvr->tx_iec958.status, 24);
+
+	return 0;
+}
+
+static int fsl_xcvr_tx_cs_put(struct snd_kcontrol *kcontrol,
+			      struct snd_ctl_elem_value *ucontrol)
+{
+	struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
+	struct fsl_xcvr *xcvr = snd_soc_dai_get_drvdata(dai);
+
+	memcpy(xcvr->tx_iec958.status, ucontrol->value.iec958.status, 24);
+
+	return 0;
+}
+
+static struct snd_kcontrol_new fsl_xcvr_rx_ctls[] = {
+	/* Channel status controller */
+	{
+		.iface = SNDRV_CTL_ELEM_IFACE_PCM,
+		.name = SNDRV_CTL_NAME_IEC958("", CAPTURE, DEFAULT),
+		.access = SNDRV_CTL_ELEM_ACCESS_READ,
+		.info = fsl_xcvr_type_iec958_info,
+		.get = fsl_xcvr_rx_cs_get,
+	},
+	/* Capture channel status, bytes */
+	{
+		.iface = SNDRV_CTL_ELEM_IFACE_PCM,
+		.name = "Capture Channel Status",
+		.access = SNDRV_CTL_ELEM_ACCESS_READ,
+		.info = fsl_xcvr_type_iec958_bytes_info,
+		.get = fsl_xcvr_rx_cs_get,
+	},
+};
+
+static struct snd_kcontrol_new fsl_xcvr_tx_ctls[] = {
+	/* Channel status controller */
+	{
+		.iface = SNDRV_CTL_ELEM_IFACE_PCM,
+		.name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, DEFAULT),
+		.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
+		.info = fsl_xcvr_type_iec958_info,
+		.get = fsl_xcvr_tx_cs_get,
+		.put = fsl_xcvr_tx_cs_put,
+	},
+	/* Playback channel status, bytes */
+	{
+		.iface = SNDRV_CTL_ELEM_IFACE_PCM,
+		.name = "Playback Channel Status",
+		.access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
+		.info = fsl_xcvr_type_iec958_bytes_info,
+		.get = fsl_xcvr_tx_cs_get,
+		.put = fsl_xcvr_tx_cs_put,
+	},
+};
+
+static const struct snd_soc_dai_ops fsl_xcvr_dai_ops = {
+	.prepare = fsl_xcvr_prepare,
+	.startup = fsl_xcvr_startup,
+	.shutdown = fsl_xcvr_shutdown,
+	.trigger = fsl_xcvr_trigger,
+};
+
+static int fsl_xcvr_dai_probe(struct snd_soc_dai *dai)
+{
+	struct fsl_xcvr *xcvr = snd_soc_dai_get_drvdata(dai);
+
+	snd_soc_dai_init_dma_data(dai, &xcvr->dma_prms_tx, &xcvr->dma_prms_rx);
+
+	snd_soc_add_dai_controls(dai, &fsl_xcvr_mode_kctl, 1);
+	snd_soc_add_dai_controls(dai, &fsl_xcvr_arc_mode_kctl, 1);
+	snd_soc_add_dai_controls(dai, &fsl_xcvr_earc_capds_kctl, 1);
+	snd_soc_add_dai_controls(dai, fsl_xcvr_tx_ctls,
+				 ARRAY_SIZE(fsl_xcvr_tx_ctls));
+	snd_soc_add_dai_controls(dai, fsl_xcvr_rx_ctls,
+				 ARRAY_SIZE(fsl_xcvr_rx_ctls));
+	return 0;
+}
+
+static struct snd_soc_dai_driver fsl_xcvr_dai = {
+	.probe  = fsl_xcvr_dai_probe,
+	.ops = &fsl_xcvr_dai_ops,
+	.playback = {
+		.stream_name = "CPU-Playback",
+		.channels_min = 1,
+		.channels_max = 32,
+		.rate_min = 32000,
+		.rate_max = 1536000,
+		.rates = SNDRV_PCM_RATE_KNOT,
+		.formats = SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE,
+	},
+	.capture = {
+		.stream_name = "CPU-Capture",
+		.channels_min = 1,
+		.channels_max = 32,
+		.rate_min = 32000,
+		.rate_max = 1536000,
+		.rates = SNDRV_PCM_RATE_KNOT,
+		.formats = SNDRV_PCM_FMTBIT_IEC958_SUBFRAME_LE,
+	},
+};
+
+static const struct snd_soc_component_driver fsl_xcvr_comp = {
+	.name			= "fsl-xcvr-dai",
+	.legacy_dai_naming	= 1,
+};
+
+static const struct reg_default fsl_xcvr_reg_defaults[] = {
+	{ FSL_XCVR_VERSION,	0x00000000 },
+	{ FSL_XCVR_EXT_CTRL,	0xF8204040 },
+	{ FSL_XCVR_EXT_STATUS,	0x00000000 },
+	{ FSL_XCVR_EXT_IER0,	0x00000000 },
+	{ FSL_XCVR_EXT_IER1,	0x00000000 },
+	{ FSL_XCVR_EXT_ISR,	0x00000000 },
+	{ FSL_XCVR_EXT_ISR_SET,	0x00000000 },
+	{ FSL_XCVR_EXT_ISR_CLR,	0x00000000 },
+	{ FSL_XCVR_EXT_ISR_TOG,	0x00000000 },
+	{ FSL_XCVR_IER,		0x00000000 },
+	{ FSL_XCVR_ISR,		0x00000000 },
+	{ FSL_XCVR_ISR_SET,	0x00000000 },
+	{ FSL_XCVR_ISR_CLR,	0x00000000 },
+	{ FSL_XCVR_ISR_TOG,	0x00000000 },
+	{ FSL_XCVR_RX_DPTH_CTRL,	0x00002C89 },
+	{ FSL_XCVR_RX_DPTH_CTRL_SET,	0x00002C89 },
+	{ FSL_XCVR_RX_DPTH_CTRL_CLR,	0x00002C89 },
+	{ FSL_XCVR_RX_DPTH_CTRL_TOG,	0x00002C89 },
+	{ FSL_XCVR_TX_DPTH_CTRL,	0x00000000 },
+	{ FSL_XCVR_TX_DPTH_CTRL_SET,	0x00000000 },
+	{ FSL_XCVR_TX_DPTH_CTRL_CLR,	0x00000000 },
+	{ FSL_XCVR_TX_DPTH_CTRL_TOG,	0x00000000 },
+	{ FSL_XCVR_TX_CS_DATA_0,	0x00000000 },
+	{ FSL_XCVR_TX_CS_DATA_1,	0x00000000 },
+	{ FSL_XCVR_TX_CS_DATA_2,	0x00000000 },
+	{ FSL_XCVR_TX_CS_DATA_3,	0x00000000 },
+	{ FSL_XCVR_TX_CS_DATA_4,	0x00000000 },
+	{ FSL_XCVR_TX_CS_DATA_5,	0x00000000 },
+	{ FSL_XCVR_DEBUG_REG_0,		0x00000000 },
+	{ FSL_XCVR_DEBUG_REG_1,		0x00000000 },
+};
+
+static bool fsl_xcvr_readable_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case FSL_XCVR_VERSION:
+	case FSL_XCVR_EXT_CTRL:
+	case FSL_XCVR_EXT_STATUS:
+	case FSL_XCVR_EXT_IER0:
+	case FSL_XCVR_EXT_IER1:
+	case FSL_XCVR_EXT_ISR:
+	case FSL_XCVR_EXT_ISR_SET:
+	case FSL_XCVR_EXT_ISR_CLR:
+	case FSL_XCVR_EXT_ISR_TOG:
+	case FSL_XCVR_IER:
+	case FSL_XCVR_ISR:
+	case FSL_XCVR_ISR_SET:
+	case FSL_XCVR_ISR_CLR:
+	case FSL_XCVR_ISR_TOG:
+	case FSL_XCVR_PHY_AI_CTRL:
+	case FSL_XCVR_PHY_AI_CTRL_SET:
+	case FSL_XCVR_PHY_AI_CTRL_CLR:
+	case FSL_XCVR_PHY_AI_CTRL_TOG:
+	case FSL_XCVR_PHY_AI_RDATA:
+	case FSL_XCVR_CLK_CTRL:
+	case FSL_XCVR_RX_DPTH_CTRL:
+	case FSL_XCVR_RX_DPTH_CTRL_SET:
+	case FSL_XCVR_RX_DPTH_CTRL_CLR:
+	case FSL_XCVR_RX_DPTH_CTRL_TOG:
+	case FSL_XCVR_TX_DPTH_CTRL:
+	case FSL_XCVR_TX_DPTH_CTRL_SET:
+	case FSL_XCVR_TX_DPTH_CTRL_CLR:
+	case FSL_XCVR_TX_DPTH_CTRL_TOG:
+	case FSL_XCVR_TX_CS_DATA_0:
+	case FSL_XCVR_TX_CS_DATA_1:
+	case FSL_XCVR_TX_CS_DATA_2:
+	case FSL_XCVR_TX_CS_DATA_3:
+	case FSL_XCVR_TX_CS_DATA_4:
+	case FSL_XCVR_TX_CS_DATA_5:
+	case FSL_XCVR_DEBUG_REG_0:
+	case FSL_XCVR_DEBUG_REG_1:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static bool fsl_xcvr_writeable_reg(struct device *dev, unsigned int reg)
+{
+	switch (reg) {
+	case FSL_XCVR_EXT_CTRL:
+	case FSL_XCVR_EXT_IER0:
+	case FSL_XCVR_EXT_IER1:
+	case FSL_XCVR_EXT_ISR:
+	case FSL_XCVR_EXT_ISR_SET:
+	case FSL_XCVR_EXT_ISR_CLR:
+	case FSL_XCVR_EXT_ISR_TOG:
+	case FSL_XCVR_IER:
+	case FSL_XCVR_ISR_SET:
+	case FSL_XCVR_ISR_CLR:
+	case FSL_XCVR_ISR_TOG:
+	case FSL_XCVR_PHY_AI_CTRL:
+	case FSL_XCVR_PHY_AI_CTRL_SET:
+	case FSL_XCVR_PHY_AI_CTRL_CLR:
+	case FSL_XCVR_PHY_AI_CTRL_TOG:
+	case FSL_XCVR_PHY_AI_WDATA:
+	case FSL_XCVR_CLK_CTRL:
+	case FSL_XCVR_RX_DPTH_CTRL:
+	case FSL_XCVR_RX_DPTH_CTRL_SET:
+	case FSL_XCVR_RX_DPTH_CTRL_CLR:
+	case FSL_XCVR_RX_DPTH_CTRL_TOG:
+	case FSL_XCVR_TX_DPTH_CTRL_SET:
+	case FSL_XCVR_TX_DPTH_CTRL_CLR:
+	case FSL_XCVR_TX_DPTH_CTRL_TOG:
+	case FSL_XCVR_TX_CS_DATA_0:
+	case FSL_XCVR_TX_CS_DATA_1:
+	case FSL_XCVR_TX_CS_DATA_2:
+	case FSL_XCVR_TX_CS_DATA_3:
+	case FSL_XCVR_TX_CS_DATA_4:
+	case FSL_XCVR_TX_CS_DATA_5:
+		return true;
+	default:
+		return false;
+	}
+}
+
+static bool fsl_xcvr_volatile_reg(struct device *dev, unsigned int reg)
+{
+	return fsl_xcvr_readable_reg(dev, reg);
+}
+
+static const struct regmap_config fsl_xcvr_regmap_cfg = {
+	.reg_bits = 32,
+	.reg_stride = 4,
+	.val_bits = 32,
+	.max_register = FSL_XCVR_MAX_REG,
+	.reg_defaults = fsl_xcvr_reg_defaults,
+	.num_reg_defaults = ARRAY_SIZE(fsl_xcvr_reg_defaults),
+	.readable_reg = fsl_xcvr_readable_reg,
+	.volatile_reg = fsl_xcvr_volatile_reg,
+	.writeable_reg = fsl_xcvr_writeable_reg,
+	.cache_type = REGCACHE_FLAT,
+};
+
+static irqreturn_t irq0_isr(int irq, void *devid)
+{
+	struct fsl_xcvr *xcvr = (struct fsl_xcvr *)devid;
+	struct device *dev = &xcvr->pdev->dev;
+	struct regmap *regmap = xcvr->regmap;
+	void __iomem *reg_ctrl, *reg_buff;
+	u32 isr, isr_clr = 0, val, i;
+
+	regmap_read(regmap, FSL_XCVR_EXT_ISR, &isr);
+
+	if (isr & FSL_XCVR_IRQ_NEW_CS) {
+		dev_dbg(dev, "Received new CS block\n");
+		isr_clr |= FSL_XCVR_IRQ_NEW_CS;
+		/* Data RAM is 4KiB, last two pages: 8 and 9. Select page 8. */
+		regmap_update_bits(xcvr->regmap, FSL_XCVR_EXT_CTRL,
+				   FSL_XCVR_EXT_CTRL_PAGE_MASK,
+				   FSL_XCVR_EXT_CTRL_PAGE(8));
+
+		/* Find updated CS buffer */
+		reg_ctrl = xcvr->ram_addr + FSL_XCVR_RX_CS_CTRL_0;
+		reg_buff = xcvr->ram_addr + FSL_XCVR_RX_CS_BUFF_0;
+		memcpy_fromio(&val, reg_ctrl, sizeof(val));
+		if (!val) {
+			reg_ctrl = xcvr->ram_addr + FSL_XCVR_RX_CS_CTRL_1;
+			reg_buff = xcvr->ram_addr + FSL_XCVR_RX_CS_BUFF_1;
+			memcpy_fromio(&val, reg_ctrl, sizeof(val));
+		}
+
+		if (val) {
+			/* copy CS buffer */
+			memcpy_fromio(&xcvr->rx_iec958.status, reg_buff,
+				      sizeof(xcvr->rx_iec958.status));
+			for (i = 0; i < 6; i++) {
+				val = *(u32 *)(xcvr->rx_iec958.status + i*4);
+				*(u32 *)(xcvr->rx_iec958.status + i*4) =
+					bitrev32(val);
+			}
+			/* clear CS control register */
+			memset_io(reg_ctrl, 0, sizeof(val));
+		}
+	}
+	if (isr & FSL_XCVR_IRQ_NEW_UD) {
+		dev_dbg(dev, "Received new UD block\n");
+		isr_clr |= FSL_XCVR_IRQ_NEW_UD;
+	}
+	if (isr & FSL_XCVR_IRQ_MUTE) {
+		dev_dbg(dev, "HW mute bit detected\n");
+		isr_clr |= FSL_XCVR_IRQ_MUTE;
+	}
+	if (isr & FSL_XCVR_IRQ_FIFO_UOFL_ERR) {
+		dev_dbg(dev, "RX/TX FIFO full/empty\n");
+		isr_clr |= FSL_XCVR_IRQ_FIFO_UOFL_ERR;
+	}
+	if (isr & FSL_XCVR_IRQ_ARC_MODE) {
+		dev_dbg(dev, "CMDC SM falls out of eARC mode\n");
+		isr_clr |= FSL_XCVR_IRQ_ARC_MODE;
+	}
+	if (isr & FSL_XCVR_IRQ_DMA_RD_REQ) {
+		dev_dbg(dev, "DMA read request\n");
+		isr_clr |= FSL_XCVR_IRQ_DMA_RD_REQ;
+	}
+	if (isr & FSL_XCVR_IRQ_DMA_WR_REQ) {
+		dev_dbg(dev, "DMA write request\n");
+		isr_clr |= FSL_XCVR_IRQ_DMA_WR_REQ;
+	}
+
+	if (isr_clr) {
+		regmap_write(regmap, FSL_XCVR_EXT_ISR_CLR, isr_clr);
+		return IRQ_HANDLED;
+	}
+
+	return IRQ_NONE;
+}
+
+static const struct fsl_xcvr_soc_data fsl_xcvr_imx8mp_data = {
+	.fw_name = "imx/xcvr/xcvr-imx8mp.bin",
+};
+
+static const struct of_device_id fsl_xcvr_dt_ids[] = {
+	{ .compatible = "fsl,imx8mp-xcvr", .data = &fsl_xcvr_imx8mp_data },
+	{ /* sentinel */ }
+};
+MODULE_DEVICE_TABLE(of, fsl_xcvr_dt_ids);
+
+static int fsl_xcvr_probe(struct platform_device *pdev)
+{
+	struct device *dev = &pdev->dev;
+	struct fsl_xcvr *xcvr;
+	struct resource *rx_res, *tx_res;
+	void __iomem *regs;
+	int ret, irq;
+
+	xcvr = devm_kzalloc(dev, sizeof(*xcvr), GFP_KERNEL);
+	if (!xcvr)
+		return -ENOMEM;
+
+	xcvr->pdev = pdev;
+	xcvr->soc_data = of_device_get_match_data(&pdev->dev);
+
+	xcvr->ipg_clk = devm_clk_get(dev, "ipg");
+	if (IS_ERR(xcvr->ipg_clk)) {
+		dev_err(dev, "failed to get ipg clock\n");
+		return PTR_ERR(xcvr->ipg_clk);
+	}
+
+	xcvr->phy_clk = devm_clk_get(dev, "phy");
+	if (IS_ERR(xcvr->phy_clk)) {
+		dev_err(dev, "failed to get phy clock\n");
+		return PTR_ERR(xcvr->phy_clk);
+	}
+
+	xcvr->spba_clk = devm_clk_get(dev, "spba");
+	if (IS_ERR(xcvr->spba_clk)) {
+		dev_err(dev, "failed to get spba clock\n");
+		return PTR_ERR(xcvr->spba_clk);
+	}
+
+	xcvr->pll_ipg_clk = devm_clk_get(dev, "pll_ipg");
+	if (IS_ERR(xcvr->pll_ipg_clk)) {
+		dev_err(dev, "failed to get pll_ipg clock\n");
+		return PTR_ERR(xcvr->pll_ipg_clk);
+	}
+
+	xcvr->ram_addr = devm_platform_ioremap_resource_byname(pdev, "ram");
+	if (IS_ERR(xcvr->ram_addr))
+		return PTR_ERR(xcvr->ram_addr);
+
+	regs = devm_platform_ioremap_resource_byname(pdev, "regs");
+	if (IS_ERR(regs))
+		return PTR_ERR(regs);
+
+	xcvr->regmap = devm_regmap_init_mmio_clk(dev, NULL, regs,
+						 &fsl_xcvr_regmap_cfg);
+	if (IS_ERR(xcvr->regmap)) {
+		dev_err(dev, "failed to init XCVR regmap: %ld\n",
+			PTR_ERR(xcvr->regmap));
+		return PTR_ERR(xcvr->regmap);
+	}
+
+	xcvr->reset = devm_reset_control_get_exclusive(dev, NULL);
+	if (IS_ERR(xcvr->reset)) {
+		dev_err(dev, "failed to get XCVR reset control\n");
+		return PTR_ERR(xcvr->reset);
+	}
+
+	/* get IRQs */
+	irq = platform_get_irq(pdev, 0);
+	if (irq < 0)
+		return irq;
+
+	ret = devm_request_irq(dev, irq, irq0_isr, 0, pdev->name, xcvr);
+	if (ret) {
+		dev_err(dev, "failed to claim IRQ0: %i\n", ret);
+		return ret;
+	}
+
+	rx_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "rxfifo");
+	tx_res = platform_get_resource_byname(pdev, IORESOURCE_MEM, "txfifo");
+	if (!rx_res || !tx_res) {
+		dev_err(dev, "could not find rxfifo or txfifo resource\n");
+		return -EINVAL;
+	}
+	xcvr->dma_prms_rx.chan_name = "rx";
+	xcvr->dma_prms_tx.chan_name = "tx";
+	xcvr->dma_prms_rx.addr = rx_res->start;
+	xcvr->dma_prms_tx.addr = tx_res->start;
+	xcvr->dma_prms_rx.maxburst = FSL_XCVR_MAXBURST_RX;
+	xcvr->dma_prms_tx.maxburst = FSL_XCVR_MAXBURST_TX;
+
+	platform_set_drvdata(pdev, xcvr);
+	pm_runtime_enable(dev);
+	regcache_cache_only(xcvr->regmap, true);
+
+	/*
+	 * Register platform component before registering cpu dai for there
+	 * is not defer probe for platform component in snd_soc_add_pcm_runtime().
+	 */
+	ret = devm_snd_dmaengine_pcm_register(dev, NULL, 0);
+	if (ret) {
+		pm_runtime_disable(dev);
+		dev_err(dev, "failed to pcm register\n");
+		return ret;
+	}
+
+	ret = devm_snd_soc_register_component(dev, &fsl_xcvr_comp,
+					      &fsl_xcvr_dai, 1);
+	if (ret) {
+		pm_runtime_disable(dev);
+		dev_err(dev, "failed to register component %s\n",
+			fsl_xcvr_comp.name);
+	}
+
+	return ret;
+}
+
+static int fsl_xcvr_remove(struct platform_device *pdev)
+{
+	pm_runtime_disable(&pdev->dev);
+	return 0;
+}
+
+static __maybe_unused int fsl_xcvr_runtime_suspend(struct device *dev)
+{
+	struct fsl_xcvr *xcvr = dev_get_drvdata(dev);
+	int ret;
+
+	/*
+	 * Clear interrupts, when streams starts or resumes after
+	 * suspend, interrupts are enabled in prepare(), so no need
+	 * to enable interrupts in resume().
+	 */
+	ret = regmap_update_bits(xcvr->regmap, FSL_XCVR_EXT_IER0,
+				 FSL_XCVR_IRQ_EARC_ALL, 0);
+	if (ret < 0)
+		dev_err(dev, "Failed to clear IER0: %d\n", ret);
+
+	/* Assert M0+ reset */
+	ret = regmap_update_bits(xcvr->regmap, FSL_XCVR_EXT_CTRL,
+				 FSL_XCVR_EXT_CTRL_CORE_RESET,
+				 FSL_XCVR_EXT_CTRL_CORE_RESET);
+	if (ret < 0)
+		dev_err(dev, "Failed to assert M0+ core: %d\n", ret);
+
+	regcache_cache_only(xcvr->regmap, true);
+
+	clk_disable_unprepare(xcvr->spba_clk);
+	clk_disable_unprepare(xcvr->phy_clk);
+	clk_disable_unprepare(xcvr->pll_ipg_clk);
+	clk_disable_unprepare(xcvr->ipg_clk);
+
+	return 0;
+}
+
+static __maybe_unused int fsl_xcvr_runtime_resume(struct device *dev)
+{
+	struct fsl_xcvr *xcvr = dev_get_drvdata(dev);
+	int ret;
+
+	ret = reset_control_assert(xcvr->reset);
+	if (ret < 0) {
+		dev_err(dev, "Failed to assert M0+ reset: %d\n", ret);
+		return ret;
+	}
+
+	ret = clk_prepare_enable(xcvr->ipg_clk);
+	if (ret) {
+		dev_err(dev, "failed to start IPG clock.\n");
+		return ret;
+	}
+
+	ret = clk_prepare_enable(xcvr->pll_ipg_clk);
+	if (ret) {
+		dev_err(dev, "failed to start PLL IPG clock.\n");
+		goto stop_ipg_clk;
+	}
+
+	ret = clk_prepare_enable(xcvr->phy_clk);
+	if (ret) {
+		dev_err(dev, "failed to start PHY clock: %d\n", ret);
+		goto stop_pll_ipg_clk;
+	}
+
+	ret = clk_prepare_enable(xcvr->spba_clk);
+	if (ret) {
+		dev_err(dev, "failed to start SPBA clock.\n");
+		goto stop_phy_clk;
+	}
+
+	regcache_cache_only(xcvr->regmap, false);
+	regcache_mark_dirty(xcvr->regmap);
+	ret = regcache_sync(xcvr->regmap);
+
+	if (ret) {
+		dev_err(dev, "failed to sync regcache.\n");
+		goto stop_spba_clk;
+	}
+
+	ret = reset_control_deassert(xcvr->reset);
+	if (ret) {
+		dev_err(dev, "failed to deassert M0+ reset.\n");
+		goto stop_spba_clk;
+	}
+
+	ret = fsl_xcvr_load_firmware(xcvr);
+	if (ret) {
+		dev_err(dev, "failed to load firmware.\n");
+		goto stop_spba_clk;
+	}
+
+	/* Release M0+ reset */
+	ret = regmap_update_bits(xcvr->regmap, FSL_XCVR_EXT_CTRL,
+				 FSL_XCVR_EXT_CTRL_CORE_RESET, 0);
+	if (ret < 0) {
+		dev_err(dev, "M0+ core release failed: %d\n", ret);
+		goto stop_spba_clk;
+	}
+
+	/* Let M0+ core complete firmware initialization */
+	msleep(50);
+
+	return 0;
+
+stop_spba_clk:
+	clk_disable_unprepare(xcvr->spba_clk);
+stop_phy_clk:
+	clk_disable_unprepare(xcvr->phy_clk);
+stop_pll_ipg_clk:
+	clk_disable_unprepare(xcvr->pll_ipg_clk);
+stop_ipg_clk:
+	clk_disable_unprepare(xcvr->ipg_clk);
+
+	return ret;
+}
+
+static const struct dev_pm_ops fsl_xcvr_pm_ops = {
+	SET_RUNTIME_PM_OPS(fsl_xcvr_runtime_suspend,
+			   fsl_xcvr_runtime_resume,
+			   NULL)
+	SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+				pm_runtime_force_resume)
+};
+
+static struct platform_driver fsl_xcvr_driver = {
+	.probe = fsl_xcvr_probe,
+	.driver = {
+		.name = "fsl,imx8mp-audio-xcvr",
+		.pm = &fsl_xcvr_pm_ops,
+		.of_match_table = fsl_xcvr_dt_ids,
+	},
+	.remove = fsl_xcvr_remove,
+};
+module_platform_driver(fsl_xcvr_driver);
+
+MODULE_AUTHOR("Viorel Suman <viorel.suman@nxp.com>");
+MODULE_DESCRIPTION("NXP Audio Transceiver (XCVR) driver");
+MODULE_LICENSE("GPL v2");