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authorDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
committerDaniel Baumann <daniel.baumann@progress-linux.org>2024-04-11 08:27:49 +0000
commitace9429bb58fd418f0c81d4c2835699bddf6bde6 (patch)
treeb2d64bc10158fdd5497876388cd68142ca374ed3 /sound/soc/fsl/fsl_spdif.c
parentInitial commit. (diff)
downloadlinux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.tar.xz
linux-ace9429bb58fd418f0c81d4c2835699bddf6bde6.zip
Adding upstream version 6.6.15.upstream/6.6.15
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to 'sound/soc/fsl/fsl_spdif.c')
-rw-r--r--sound/soc/fsl/fsl_spdif.c1779
1 files changed, 1779 insertions, 0 deletions
diff --git a/sound/soc/fsl/fsl_spdif.c b/sound/soc/fsl/fsl_spdif.c
new file mode 100644
index 0000000000..78d9dfbe65
--- /dev/null
+++ b/sound/soc/fsl/fsl_spdif.c
@@ -0,0 +1,1779 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// Freescale S/PDIF ALSA SoC Digital Audio Interface (DAI) driver
+//
+// Copyright (C) 2013 Freescale Semiconductor, Inc.
+//
+// Based on stmp3xxx_spdif_dai.c
+// Vladimir Barinov <vbarinov@embeddedalley.com>
+// Copyright 2008 SigmaTel, Inc
+// Copyright 2008 Embedded Alley Solutions, Inc
+
+#include <linux/bitrev.h>
+#include <linux/clk.h>
+#include <linux/module.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/of_irq.h>
+#include <linux/regmap.h>
+#include <linux/pm_runtime.h>
+
+#include <sound/asoundef.h>
+#include <sound/dmaengine_pcm.h>
+#include <sound/soc.h>
+
+#include "fsl_spdif.h"
+#include "fsl_utils.h"
+#include "imx-pcm.h"
+
+#define FSL_SPDIF_TXFIFO_WML 0x8
+#define FSL_SPDIF_RXFIFO_WML 0x8
+
+#define INTR_FOR_PLAYBACK (INT_TXFIFO_RESYNC)
+#define INTR_FOR_CAPTURE (INT_SYM_ERR | INT_BIT_ERR | INT_URX_FUL |\
+ INT_URX_OV | INT_QRX_FUL | INT_QRX_OV |\
+ INT_UQ_SYNC | INT_UQ_ERR | INT_RXFIFO_RESYNC |\
+ INT_LOSS_LOCK | INT_DPLL_LOCKED)
+
+#define SIE_INTR_FOR(tx) (tx ? INTR_FOR_PLAYBACK : INTR_FOR_CAPTURE)
+
+/* Index list for the values that has if (DPLL Locked) condition */
+static u8 srpc_dpll_locked[] = { 0x0, 0x1, 0x2, 0x3, 0x4, 0xa, 0xb };
+#define SRPC_NODPLL_START1 0x5
+#define SRPC_NODPLL_START2 0xc
+
+#define DEFAULT_RXCLK_SRC 1
+
+#define RX_SAMPLE_RATE_KCONTROL "RX Sample Rate"
+
+/**
+ * struct fsl_spdif_soc_data: soc specific data
+ *
+ * @imx: for imx platform
+ * @shared_root_clock: flag of sharing a clock source with others;
+ * so the driver shouldn't set root clock rate
+ * @raw_capture_mode: if raw capture mode support
+ * @cchannel_192b: if there are registers for 192bits C channel data
+ * @interrupts: interrupt number
+ * @tx_burst: tx maxburst size
+ * @rx_burst: rx maxburst size
+ * @tx_formats: tx supported data format
+ */
+struct fsl_spdif_soc_data {
+ bool imx;
+ bool shared_root_clock;
+ bool raw_capture_mode;
+ bool cchannel_192b;
+ u32 interrupts;
+ u32 tx_burst;
+ u32 rx_burst;
+ u64 tx_formats;
+};
+
+/*
+ * SPDIF control structure
+ * Defines channel status, subcode and Q sub
+ */
+struct spdif_mixer_control {
+ /* spinlock to access control data */
+ spinlock_t ctl_lock;
+
+ /* IEC958 channel tx status bit */
+ unsigned char ch_status[4];
+
+ /* User bits */
+ unsigned char subcode[2 * SPDIF_UBITS_SIZE];
+
+ /* Q subcode part of user bits */
+ unsigned char qsub[2 * SPDIF_QSUB_SIZE];
+
+ /* Buffer offset for U/Q */
+ u32 upos;
+ u32 qpos;
+
+ /* Ready buffer index of the two buffers */
+ u32 ready_buf;
+};
+
+/**
+ * struct fsl_spdif_priv - Freescale SPDIF private data
+ * @soc: SPDIF soc data
+ * @fsl_spdif_control: SPDIF control data
+ * @cpu_dai_drv: cpu dai driver
+ * @snd_card: sound card pointer
+ * @rxrate_kcontrol: kcontrol for RX Sample Rate
+ * @pdev: platform device pointer
+ * @regmap: regmap handler
+ * @dpll_locked: dpll lock flag
+ * @txrate: the best rates for playback
+ * @txclk_df: STC_TXCLK_DF dividers value for playback
+ * @sysclk_df: STC_SYSCLK_DF dividers value for playback
+ * @txclk_src: STC_TXCLK_SRC values for playback
+ * @rxclk_src: SRPC_CLKSRC_SEL values for capture
+ * @txclk: tx clock sources for playback
+ * @rxclk: rx clock sources for capture
+ * @coreclk: core clock for register access via DMA
+ * @sysclk: system clock for rx clock rate measurement
+ * @spbaclk: SPBA clock (optional, depending on SoC design)
+ * @dma_params_tx: DMA parameters for transmit channel
+ * @dma_params_rx: DMA parameters for receive channel
+ * @regcache_srpc: regcache for SRPC
+ * @bypass: status of bypass input to output
+ * @pll8k_clk: PLL clock for the rate of multiply of 8kHz
+ * @pll11k_clk: PLL clock for the rate of multiply of 11kHz
+ */
+struct fsl_spdif_priv {
+ const struct fsl_spdif_soc_data *soc;
+ struct spdif_mixer_control fsl_spdif_control;
+ struct snd_soc_dai_driver cpu_dai_drv;
+ struct snd_card *snd_card;
+ struct snd_kcontrol *rxrate_kcontrol;
+ struct platform_device *pdev;
+ struct regmap *regmap;
+ bool dpll_locked;
+ u32 txrate[SPDIF_TXRATE_MAX];
+ u8 txclk_df[SPDIF_TXRATE_MAX];
+ u16 sysclk_df[SPDIF_TXRATE_MAX];
+ u8 txclk_src[SPDIF_TXRATE_MAX];
+ u8 rxclk_src;
+ struct clk *txclk[STC_TXCLK_SRC_MAX];
+ struct clk *rxclk;
+ struct clk *coreclk;
+ struct clk *sysclk;
+ struct clk *spbaclk;
+ struct snd_dmaengine_dai_dma_data dma_params_tx;
+ struct snd_dmaengine_dai_dma_data dma_params_rx;
+ /* regcache for SRPC */
+ u32 regcache_srpc;
+ bool bypass;
+ struct clk *pll8k_clk;
+ struct clk *pll11k_clk;
+};
+
+static struct fsl_spdif_soc_data fsl_spdif_vf610 = {
+ .imx = false,
+ .shared_root_clock = false,
+ .raw_capture_mode = false,
+ .interrupts = 1,
+ .tx_burst = FSL_SPDIF_TXFIFO_WML,
+ .rx_burst = FSL_SPDIF_RXFIFO_WML,
+ .tx_formats = FSL_SPDIF_FORMATS_PLAYBACK,
+};
+
+static struct fsl_spdif_soc_data fsl_spdif_imx35 = {
+ .imx = true,
+ .shared_root_clock = false,
+ .raw_capture_mode = false,
+ .interrupts = 1,
+ .tx_burst = FSL_SPDIF_TXFIFO_WML,
+ .rx_burst = FSL_SPDIF_RXFIFO_WML,
+ .tx_formats = FSL_SPDIF_FORMATS_PLAYBACK,
+};
+
+static struct fsl_spdif_soc_data fsl_spdif_imx6sx = {
+ .imx = true,
+ .shared_root_clock = true,
+ .raw_capture_mode = false,
+ .interrupts = 1,
+ .tx_burst = FSL_SPDIF_TXFIFO_WML,
+ .rx_burst = FSL_SPDIF_RXFIFO_WML,
+ .tx_formats = FSL_SPDIF_FORMATS_PLAYBACK,
+
+};
+
+static struct fsl_spdif_soc_data fsl_spdif_imx8qm = {
+ .imx = true,
+ .shared_root_clock = true,
+ .raw_capture_mode = false,
+ .interrupts = 2,
+ .tx_burst = 2, /* Applied for EDMA */
+ .rx_burst = 2, /* Applied for EDMA */
+ .tx_formats = SNDRV_PCM_FMTBIT_S24_LE, /* Applied for EDMA */
+};
+
+static struct fsl_spdif_soc_data fsl_spdif_imx8mm = {
+ .imx = true,
+ .shared_root_clock = false,
+ .raw_capture_mode = true,
+ .interrupts = 1,
+ .tx_burst = FSL_SPDIF_TXFIFO_WML,
+ .rx_burst = FSL_SPDIF_RXFIFO_WML,
+ .tx_formats = FSL_SPDIF_FORMATS_PLAYBACK,
+};
+
+static struct fsl_spdif_soc_data fsl_spdif_imx8ulp = {
+ .imx = true,
+ .shared_root_clock = true,
+ .raw_capture_mode = false,
+ .interrupts = 1,
+ .tx_burst = 2, /* Applied for EDMA */
+ .rx_burst = 2, /* Applied for EDMA */
+ .tx_formats = SNDRV_PCM_FMTBIT_S24_LE, /* Applied for EDMA */
+ .cchannel_192b = true,
+};
+
+/* Check if clk is a root clock that does not share clock source with others */
+static inline bool fsl_spdif_can_set_clk_rate(struct fsl_spdif_priv *spdif, int clk)
+{
+ return (clk == STC_TXCLK_SPDIF_ROOT) && !spdif->soc->shared_root_clock;
+}
+
+/* DPLL locked and lock loss interrupt handler */
+static void spdif_irq_dpll_lock(struct fsl_spdif_priv *spdif_priv)
+{
+ struct regmap *regmap = spdif_priv->regmap;
+ struct platform_device *pdev = spdif_priv->pdev;
+ u32 locked;
+
+ regmap_read(regmap, REG_SPDIF_SRPC, &locked);
+ locked &= SRPC_DPLL_LOCKED;
+
+ dev_dbg(&pdev->dev, "isr: Rx dpll %s \n",
+ locked ? "locked" : "loss lock");
+
+ spdif_priv->dpll_locked = locked ? true : false;
+
+ if (spdif_priv->snd_card && spdif_priv->rxrate_kcontrol) {
+ snd_ctl_notify(spdif_priv->snd_card,
+ SNDRV_CTL_EVENT_MASK_VALUE,
+ &spdif_priv->rxrate_kcontrol->id);
+ }
+}
+
+/* Receiver found illegal symbol interrupt handler */
+static void spdif_irq_sym_error(struct fsl_spdif_priv *spdif_priv)
+{
+ struct regmap *regmap = spdif_priv->regmap;
+ struct platform_device *pdev = spdif_priv->pdev;
+
+ dev_dbg(&pdev->dev, "isr: receiver found illegal symbol\n");
+
+ /* Clear illegal symbol if DPLL unlocked since no audio stream */
+ if (!spdif_priv->dpll_locked)
+ regmap_update_bits(regmap, REG_SPDIF_SIE, INT_SYM_ERR, 0);
+}
+
+/* U/Q Channel receive register full */
+static void spdif_irq_uqrx_full(struct fsl_spdif_priv *spdif_priv, char name)
+{
+ struct spdif_mixer_control *ctrl = &spdif_priv->fsl_spdif_control;
+ struct regmap *regmap = spdif_priv->regmap;
+ struct platform_device *pdev = spdif_priv->pdev;
+ u32 *pos, size, val, reg;
+
+ switch (name) {
+ case 'U':
+ pos = &ctrl->upos;
+ size = SPDIF_UBITS_SIZE;
+ reg = REG_SPDIF_SRU;
+ break;
+ case 'Q':
+ pos = &ctrl->qpos;
+ size = SPDIF_QSUB_SIZE;
+ reg = REG_SPDIF_SRQ;
+ break;
+ default:
+ dev_err(&pdev->dev, "unsupported channel name\n");
+ return;
+ }
+
+ dev_dbg(&pdev->dev, "isr: %c Channel receive register full\n", name);
+
+ if (*pos >= size * 2) {
+ *pos = 0;
+ } else if (unlikely((*pos % size) + 3 > size)) {
+ dev_err(&pdev->dev, "User bit receive buffer overflow\n");
+ return;
+ }
+
+ regmap_read(regmap, reg, &val);
+ ctrl->subcode[*pos++] = val >> 16;
+ ctrl->subcode[*pos++] = val >> 8;
+ ctrl->subcode[*pos++] = val;
+}
+
+/* U/Q Channel sync found */
+static void spdif_irq_uq_sync(struct fsl_spdif_priv *spdif_priv)
+{
+ struct spdif_mixer_control *ctrl = &spdif_priv->fsl_spdif_control;
+ struct platform_device *pdev = spdif_priv->pdev;
+
+ dev_dbg(&pdev->dev, "isr: U/Q Channel sync found\n");
+
+ /* U/Q buffer reset */
+ if (ctrl->qpos == 0)
+ return;
+
+ /* Set ready to this buffer */
+ ctrl->ready_buf = (ctrl->qpos - 1) / SPDIF_QSUB_SIZE + 1;
+}
+
+/* U/Q Channel framing error */
+static void spdif_irq_uq_err(struct fsl_spdif_priv *spdif_priv)
+{
+ struct spdif_mixer_control *ctrl = &spdif_priv->fsl_spdif_control;
+ struct regmap *regmap = spdif_priv->regmap;
+ struct platform_device *pdev = spdif_priv->pdev;
+ u32 val;
+
+ dev_dbg(&pdev->dev, "isr: U/Q Channel framing error\n");
+
+ /* Read U/Q data to clear the irq and do buffer reset */
+ regmap_read(regmap, REG_SPDIF_SRU, &val);
+ regmap_read(regmap, REG_SPDIF_SRQ, &val);
+
+ /* Drop this U/Q buffer */
+ ctrl->ready_buf = 0;
+ ctrl->upos = 0;
+ ctrl->qpos = 0;
+}
+
+/* Get spdif interrupt status and clear the interrupt */
+static u32 spdif_intr_status_clear(struct fsl_spdif_priv *spdif_priv)
+{
+ struct regmap *regmap = spdif_priv->regmap;
+ u32 val, val2;
+
+ regmap_read(regmap, REG_SPDIF_SIS, &val);
+ regmap_read(regmap, REG_SPDIF_SIE, &val2);
+
+ regmap_write(regmap, REG_SPDIF_SIC, val & val2);
+
+ return val;
+}
+
+static irqreturn_t spdif_isr(int irq, void *devid)
+{
+ struct fsl_spdif_priv *spdif_priv = (struct fsl_spdif_priv *)devid;
+ struct platform_device *pdev = spdif_priv->pdev;
+ u32 sis;
+
+ sis = spdif_intr_status_clear(spdif_priv);
+
+ if (sis & INT_DPLL_LOCKED)
+ spdif_irq_dpll_lock(spdif_priv);
+
+ if (sis & INT_TXFIFO_UNOV)
+ dev_dbg(&pdev->dev, "isr: Tx FIFO under/overrun\n");
+
+ if (sis & INT_TXFIFO_RESYNC)
+ dev_dbg(&pdev->dev, "isr: Tx FIFO resync\n");
+
+ if (sis & INT_CNEW)
+ dev_dbg(&pdev->dev, "isr: cstatus new\n");
+
+ if (sis & INT_VAL_NOGOOD)
+ dev_dbg(&pdev->dev, "isr: validity flag no good\n");
+
+ if (sis & INT_SYM_ERR)
+ spdif_irq_sym_error(spdif_priv);
+
+ if (sis & INT_BIT_ERR)
+ dev_dbg(&pdev->dev, "isr: receiver found parity bit error\n");
+
+ if (sis & INT_URX_FUL)
+ spdif_irq_uqrx_full(spdif_priv, 'U');
+
+ if (sis & INT_URX_OV)
+ dev_dbg(&pdev->dev, "isr: U Channel receive register overrun\n");
+
+ if (sis & INT_QRX_FUL)
+ spdif_irq_uqrx_full(spdif_priv, 'Q');
+
+ if (sis & INT_QRX_OV)
+ dev_dbg(&pdev->dev, "isr: Q Channel receive register overrun\n");
+
+ if (sis & INT_UQ_SYNC)
+ spdif_irq_uq_sync(spdif_priv);
+
+ if (sis & INT_UQ_ERR)
+ spdif_irq_uq_err(spdif_priv);
+
+ if (sis & INT_RXFIFO_UNOV)
+ dev_dbg(&pdev->dev, "isr: Rx FIFO under/overrun\n");
+
+ if (sis & INT_RXFIFO_RESYNC)
+ dev_dbg(&pdev->dev, "isr: Rx FIFO resync\n");
+
+ if (sis & INT_LOSS_LOCK)
+ spdif_irq_dpll_lock(spdif_priv);
+
+ /* FIXME: Write Tx FIFO to clear TxEm */
+ if (sis & INT_TX_EM)
+ dev_dbg(&pdev->dev, "isr: Tx FIFO empty\n");
+
+ /* FIXME: Read Rx FIFO to clear RxFIFOFul */
+ if (sis & INT_RXFIFO_FUL)
+ dev_dbg(&pdev->dev, "isr: Rx FIFO full\n");
+
+ return IRQ_HANDLED;
+}
+
+static int spdif_softreset(struct fsl_spdif_priv *spdif_priv)
+{
+ struct regmap *regmap = spdif_priv->regmap;
+ u32 val, cycle = 1000;
+
+ regcache_cache_bypass(regmap, true);
+
+ regmap_write(regmap, REG_SPDIF_SCR, SCR_SOFT_RESET);
+
+ /*
+ * RESET bit would be cleared after finishing its reset procedure,
+ * which typically lasts 8 cycles. 1000 cycles will keep it safe.
+ */
+ do {
+ regmap_read(regmap, REG_SPDIF_SCR, &val);
+ } while ((val & SCR_SOFT_RESET) && cycle--);
+
+ regcache_cache_bypass(regmap, false);
+ regcache_mark_dirty(regmap);
+ regcache_sync(regmap);
+
+ if (cycle)
+ return 0;
+ else
+ return -EBUSY;
+}
+
+static void spdif_set_cstatus(struct spdif_mixer_control *ctrl,
+ u8 mask, u8 cstatus)
+{
+ ctrl->ch_status[3] &= ~mask;
+ ctrl->ch_status[3] |= cstatus & mask;
+}
+
+static void spdif_write_channel_status(struct fsl_spdif_priv *spdif_priv)
+{
+ struct spdif_mixer_control *ctrl = &spdif_priv->fsl_spdif_control;
+ struct regmap *regmap = spdif_priv->regmap;
+ struct platform_device *pdev = spdif_priv->pdev;
+ u32 ch_status;
+
+ ch_status = (bitrev8(ctrl->ch_status[0]) << 16) |
+ (bitrev8(ctrl->ch_status[1]) << 8) |
+ bitrev8(ctrl->ch_status[2]);
+ regmap_write(regmap, REG_SPDIF_STCSCH, ch_status);
+
+ dev_dbg(&pdev->dev, "STCSCH: 0x%06x\n", ch_status);
+
+ ch_status = bitrev8(ctrl->ch_status[3]) << 16;
+ regmap_write(regmap, REG_SPDIF_STCSCL, ch_status);
+
+ dev_dbg(&pdev->dev, "STCSCL: 0x%06x\n", ch_status);
+
+ if (spdif_priv->soc->cchannel_192b) {
+ ch_status = (bitrev8(ctrl->ch_status[0]) << 24) |
+ (bitrev8(ctrl->ch_status[1]) << 16) |
+ (bitrev8(ctrl->ch_status[2]) << 8) |
+ bitrev8(ctrl->ch_status[3]);
+
+ regmap_update_bits(regmap, REG_SPDIF_SCR, 0x1000000, 0x1000000);
+
+ /*
+ * The first 32bit should be in REG_SPDIF_STCCA_31_0 register,
+ * but here we need to set REG_SPDIF_STCCA_191_160 on 8ULP
+ * then can get correct result with HDMI analyzer capture.
+ * There is a hardware bug here.
+ */
+ regmap_write(regmap, REG_SPDIF_STCCA_191_160, ch_status);
+ }
+}
+
+/* Set SPDIF PhaseConfig register for rx clock */
+static int spdif_set_rx_clksrc(struct fsl_spdif_priv *spdif_priv,
+ enum spdif_gainsel gainsel, int dpll_locked)
+{
+ struct regmap *regmap = spdif_priv->regmap;
+ u8 clksrc = spdif_priv->rxclk_src;
+
+ if (clksrc >= SRPC_CLKSRC_MAX || gainsel >= GAINSEL_MULTI_MAX)
+ return -EINVAL;
+
+ regmap_update_bits(regmap, REG_SPDIF_SRPC,
+ SRPC_CLKSRC_SEL_MASK | SRPC_GAINSEL_MASK,
+ SRPC_CLKSRC_SEL_SET(clksrc) | SRPC_GAINSEL_SET(gainsel));
+
+ return 0;
+}
+
+static int fsl_spdif_probe_txclk(struct fsl_spdif_priv *spdif_priv, enum spdif_txrate index);
+
+static int spdif_set_sample_rate(struct snd_pcm_substream *substream,
+ int sample_rate)
+{
+ struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+ struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(asoc_rtd_to_cpu(rtd, 0));
+ struct spdif_mixer_control *ctrl = &spdif_priv->fsl_spdif_control;
+ struct regmap *regmap = spdif_priv->regmap;
+ struct platform_device *pdev = spdif_priv->pdev;
+ unsigned long csfs = 0;
+ u32 stc, mask, rate;
+ u16 sysclk_df;
+ u8 clk, txclk_df;
+ int ret;
+
+ switch (sample_rate) {
+ case 22050:
+ rate = SPDIF_TXRATE_22050;
+ csfs = IEC958_AES3_CON_FS_22050;
+ break;
+ case 32000:
+ rate = SPDIF_TXRATE_32000;
+ csfs = IEC958_AES3_CON_FS_32000;
+ break;
+ case 44100:
+ rate = SPDIF_TXRATE_44100;
+ csfs = IEC958_AES3_CON_FS_44100;
+ break;
+ case 48000:
+ rate = SPDIF_TXRATE_48000;
+ csfs = IEC958_AES3_CON_FS_48000;
+ break;
+ case 88200:
+ rate = SPDIF_TXRATE_88200;
+ csfs = IEC958_AES3_CON_FS_88200;
+ break;
+ case 96000:
+ rate = SPDIF_TXRATE_96000;
+ csfs = IEC958_AES3_CON_FS_96000;
+ break;
+ case 176400:
+ rate = SPDIF_TXRATE_176400;
+ csfs = IEC958_AES3_CON_FS_176400;
+ break;
+ case 192000:
+ rate = SPDIF_TXRATE_192000;
+ csfs = IEC958_AES3_CON_FS_192000;
+ break;
+ default:
+ dev_err(&pdev->dev, "unsupported sample rate %d\n", sample_rate);
+ return -EINVAL;
+ }
+
+ ret = fsl_spdif_probe_txclk(spdif_priv, rate);
+ if (ret)
+ return ret;
+
+ clk = spdif_priv->txclk_src[rate];
+ if (clk >= STC_TXCLK_SRC_MAX) {
+ dev_err(&pdev->dev, "tx clock source is out of range\n");
+ return -EINVAL;
+ }
+
+ txclk_df = spdif_priv->txclk_df[rate];
+ if (txclk_df == 0) {
+ dev_err(&pdev->dev, "the txclk_df can't be zero\n");
+ return -EINVAL;
+ }
+
+ sysclk_df = spdif_priv->sysclk_df[rate];
+
+ if (!fsl_spdif_can_set_clk_rate(spdif_priv, clk))
+ goto clk_set_bypass;
+
+ /* The S/PDIF block needs a clock of 64 * fs * txclk_df */
+ ret = clk_set_rate(spdif_priv->txclk[clk],
+ 64 * sample_rate * txclk_df);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to set tx clock rate\n");
+ return ret;
+ }
+
+clk_set_bypass:
+ dev_dbg(&pdev->dev, "expected clock rate = %d\n",
+ (64 * sample_rate * txclk_df * sysclk_df));
+ dev_dbg(&pdev->dev, "actual clock rate = %ld\n",
+ clk_get_rate(spdif_priv->txclk[clk]));
+
+ /* set fs field in consumer channel status */
+ spdif_set_cstatus(ctrl, IEC958_AES3_CON_FS, csfs);
+
+ /* select clock source and divisor */
+ stc = STC_TXCLK_ALL_EN | STC_TXCLK_SRC_SET(clk) |
+ STC_TXCLK_DF(txclk_df) | STC_SYSCLK_DF(sysclk_df);
+ mask = STC_TXCLK_ALL_EN_MASK | STC_TXCLK_SRC_MASK |
+ STC_TXCLK_DF_MASK | STC_SYSCLK_DF_MASK;
+ regmap_update_bits(regmap, REG_SPDIF_STC, mask, stc);
+
+ dev_dbg(&pdev->dev, "set sample rate to %dHz for %dHz playback\n",
+ spdif_priv->txrate[rate], sample_rate);
+
+ return 0;
+}
+
+static int fsl_spdif_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *cpu_dai)
+{
+ struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+ struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(asoc_rtd_to_cpu(rtd, 0));
+ struct platform_device *pdev = spdif_priv->pdev;
+ struct regmap *regmap = spdif_priv->regmap;
+ u32 scr, mask;
+ int ret;
+
+ /* Reset module and interrupts only for first initialization */
+ if (!snd_soc_dai_active(cpu_dai)) {
+ ret = spdif_softreset(spdif_priv);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to soft reset\n");
+ return ret;
+ }
+
+ /* Disable all the interrupts */
+ regmap_update_bits(regmap, REG_SPDIF_SIE, 0xffffff, 0);
+ }
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ scr = SCR_TXFIFO_AUTOSYNC | SCR_TXFIFO_CTRL_NORMAL |
+ SCR_TXSEL_NORMAL | SCR_USRC_SEL_CHIP |
+ SCR_TXFIFO_FSEL_IF8;
+ mask = SCR_TXFIFO_AUTOSYNC_MASK | SCR_TXFIFO_CTRL_MASK |
+ SCR_TXSEL_MASK | SCR_USRC_SEL_MASK |
+ SCR_TXFIFO_FSEL_MASK;
+ } else {
+ scr = SCR_RXFIFO_FSEL_IF8 | SCR_RXFIFO_AUTOSYNC;
+ mask = SCR_RXFIFO_FSEL_MASK | SCR_RXFIFO_AUTOSYNC_MASK|
+ SCR_RXFIFO_CTL_MASK | SCR_RXFIFO_OFF_MASK;
+ }
+ regmap_update_bits(regmap, REG_SPDIF_SCR, mask, scr);
+
+ /* Power up SPDIF module */
+ regmap_update_bits(regmap, REG_SPDIF_SCR, SCR_LOW_POWER, 0);
+
+ return 0;
+}
+
+static void fsl_spdif_shutdown(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *cpu_dai)
+{
+ struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+ struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(asoc_rtd_to_cpu(rtd, 0));
+ struct regmap *regmap = spdif_priv->regmap;
+ u32 scr, mask;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ scr = 0;
+ mask = SCR_TXFIFO_AUTOSYNC_MASK | SCR_TXFIFO_CTRL_MASK |
+ SCR_TXSEL_MASK | SCR_USRC_SEL_MASK |
+ SCR_TXFIFO_FSEL_MASK;
+ /* Disable TX clock */
+ regmap_update_bits(regmap, REG_SPDIF_STC, STC_TXCLK_ALL_EN_MASK, 0);
+ } else {
+ scr = SCR_RXFIFO_OFF | SCR_RXFIFO_CTL_ZERO;
+ mask = SCR_RXFIFO_FSEL_MASK | SCR_RXFIFO_AUTOSYNC_MASK|
+ SCR_RXFIFO_CTL_MASK | SCR_RXFIFO_OFF_MASK;
+ }
+ regmap_update_bits(regmap, REG_SPDIF_SCR, mask, scr);
+
+ /* Power down SPDIF module only if tx&rx are both inactive */
+ if (!snd_soc_dai_active(cpu_dai)) {
+ spdif_intr_status_clear(spdif_priv);
+ regmap_update_bits(regmap, REG_SPDIF_SCR,
+ SCR_LOW_POWER, SCR_LOW_POWER);
+ }
+}
+
+static int spdif_reparent_rootclk(struct fsl_spdif_priv *spdif_priv, unsigned int sample_rate)
+{
+ struct platform_device *pdev = spdif_priv->pdev;
+ struct clk *clk;
+ int ret;
+
+ /* Reparent clock if required condition is true */
+ if (!fsl_spdif_can_set_clk_rate(spdif_priv, STC_TXCLK_SPDIF_ROOT))
+ return 0;
+
+ /* Get root clock */
+ clk = spdif_priv->txclk[STC_TXCLK_SPDIF_ROOT];
+
+ /* Disable clock first, for it was enabled by pm_runtime */
+ clk_disable_unprepare(clk);
+ fsl_asoc_reparent_pll_clocks(&pdev->dev, clk, spdif_priv->pll8k_clk,
+ spdif_priv->pll11k_clk, sample_rate);
+ ret = clk_prepare_enable(clk);
+ if (ret)
+ return ret;
+
+ return 0;
+}
+static int fsl_spdif_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+ struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(asoc_rtd_to_cpu(rtd, 0));
+ struct spdif_mixer_control *ctrl = &spdif_priv->fsl_spdif_control;
+ struct platform_device *pdev = spdif_priv->pdev;
+ u32 sample_rate = params_rate(params);
+ int ret = 0;
+
+ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ ret = spdif_reparent_rootclk(spdif_priv, sample_rate);
+ if (ret) {
+ dev_err(&pdev->dev, "%s: reparent root clk failed: %d\n",
+ __func__, sample_rate);
+ return ret;
+ }
+
+ ret = spdif_set_sample_rate(substream, sample_rate);
+ if (ret) {
+ dev_err(&pdev->dev, "%s: set sample rate failed: %d\n",
+ __func__, sample_rate);
+ return ret;
+ }
+ spdif_set_cstatus(ctrl, IEC958_AES3_CON_CLOCK,
+ IEC958_AES3_CON_CLOCK_1000PPM);
+ spdif_write_channel_status(spdif_priv);
+ } else {
+ /* Setup rx clock source */
+ ret = spdif_set_rx_clksrc(spdif_priv, SPDIF_DEFAULT_GAINSEL, 1);
+ }
+
+ return ret;
+}
+
+static int fsl_spdif_trigger(struct snd_pcm_substream *substream,
+ int cmd, struct snd_soc_dai *dai)
+{
+ struct snd_soc_pcm_runtime *rtd = asoc_substream_to_rtd(substream);
+ struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(asoc_rtd_to_cpu(rtd, 0));
+ struct regmap *regmap = spdif_priv->regmap;
+ bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
+ u32 intr = SIE_INTR_FOR(tx);
+ u32 dmaen = SCR_DMA_xX_EN(tx);
+
+ switch (cmd) {
+ case SNDRV_PCM_TRIGGER_START:
+ case SNDRV_PCM_TRIGGER_RESUME:
+ case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
+ regmap_update_bits(regmap, REG_SPDIF_SIE, intr, intr);
+ regmap_update_bits(regmap, REG_SPDIF_SCR, dmaen, dmaen);
+ break;
+ case SNDRV_PCM_TRIGGER_STOP:
+ case SNDRV_PCM_TRIGGER_SUSPEND:
+ case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
+ regmap_update_bits(regmap, REG_SPDIF_SCR, dmaen, 0);
+ regmap_update_bits(regmap, REG_SPDIF_SIE, intr, 0);
+ regmap_write(regmap, REG_SPDIF_STL, 0x0);
+ regmap_write(regmap, REG_SPDIF_STR, 0x0);
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+/*
+ * FSL SPDIF IEC958 controller(mixer) functions
+ *
+ * Channel status get/put control
+ * User bit value get/put control
+ * Valid bit value get control
+ * DPLL lock status get control
+ * User bit sync mode selection control
+ */
+
+static int fsl_spdif_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_spdif_pb_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *uvalue)
+{
+ struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
+ struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(cpu_dai);
+ struct spdif_mixer_control *ctrl = &spdif_priv->fsl_spdif_control;
+
+ uvalue->value.iec958.status[0] = ctrl->ch_status[0];
+ uvalue->value.iec958.status[1] = ctrl->ch_status[1];
+ uvalue->value.iec958.status[2] = ctrl->ch_status[2];
+ uvalue->value.iec958.status[3] = ctrl->ch_status[3];
+
+ return 0;
+}
+
+static int fsl_spdif_pb_put(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *uvalue)
+{
+ struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
+ struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(cpu_dai);
+ struct spdif_mixer_control *ctrl = &spdif_priv->fsl_spdif_control;
+
+ ctrl->ch_status[0] = uvalue->value.iec958.status[0];
+ ctrl->ch_status[1] = uvalue->value.iec958.status[1];
+ ctrl->ch_status[2] = uvalue->value.iec958.status[2];
+ ctrl->ch_status[3] = uvalue->value.iec958.status[3];
+
+ spdif_write_channel_status(spdif_priv);
+
+ return 0;
+}
+
+/* Get channel status from SPDIF_RX_CCHAN register */
+static int fsl_spdif_capture_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
+ struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(cpu_dai);
+ struct regmap *regmap = spdif_priv->regmap;
+ u32 cstatus, val;
+
+ regmap_read(regmap, REG_SPDIF_SIS, &val);
+ if (!(val & INT_CNEW))
+ return -EAGAIN;
+
+ regmap_read(regmap, REG_SPDIF_SRCSH, &cstatus);
+ ucontrol->value.iec958.status[0] = (cstatus >> 16) & 0xFF;
+ ucontrol->value.iec958.status[1] = (cstatus >> 8) & 0xFF;
+ ucontrol->value.iec958.status[2] = cstatus & 0xFF;
+
+ regmap_read(regmap, REG_SPDIF_SRCSL, &cstatus);
+ ucontrol->value.iec958.status[3] = (cstatus >> 16) & 0xFF;
+ ucontrol->value.iec958.status[4] = (cstatus >> 8) & 0xFF;
+ ucontrol->value.iec958.status[5] = cstatus & 0xFF;
+
+ /* Clear intr */
+ regmap_write(regmap, REG_SPDIF_SIC, INT_CNEW);
+
+ return 0;
+}
+
+/*
+ * Get User bits (subcode) from chip value which readed out
+ * in UChannel register.
+ */
+static int fsl_spdif_subcode_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
+ struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(cpu_dai);
+ struct spdif_mixer_control *ctrl = &spdif_priv->fsl_spdif_control;
+ unsigned long flags;
+ int ret = -EAGAIN;
+
+ spin_lock_irqsave(&ctrl->ctl_lock, flags);
+ if (ctrl->ready_buf) {
+ int idx = (ctrl->ready_buf - 1) * SPDIF_UBITS_SIZE;
+ memcpy(&ucontrol->value.iec958.subcode[0],
+ &ctrl->subcode[idx], SPDIF_UBITS_SIZE);
+ ret = 0;
+ }
+ spin_unlock_irqrestore(&ctrl->ctl_lock, flags);
+
+ return ret;
+}
+
+/* Q-subcode information. The byte size is SPDIF_UBITS_SIZE/8 */
+static int fsl_spdif_qinfo(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_info *uinfo)
+{
+ uinfo->type = SNDRV_CTL_ELEM_TYPE_BYTES;
+ uinfo->count = SPDIF_QSUB_SIZE;
+
+ return 0;
+}
+
+/* Get Q subcode from chip value which readed out in QChannel register */
+static int fsl_spdif_qget(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
+ struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(cpu_dai);
+ struct spdif_mixer_control *ctrl = &spdif_priv->fsl_spdif_control;
+ unsigned long flags;
+ int ret = -EAGAIN;
+
+ spin_lock_irqsave(&ctrl->ctl_lock, flags);
+ if (ctrl->ready_buf) {
+ int idx = (ctrl->ready_buf - 1) * SPDIF_QSUB_SIZE;
+ memcpy(&ucontrol->value.bytes.data[0],
+ &ctrl->qsub[idx], SPDIF_QSUB_SIZE);
+ ret = 0;
+ }
+ spin_unlock_irqrestore(&ctrl->ctl_lock, flags);
+
+ return ret;
+}
+
+/* Get valid good bit from interrupt status register */
+static int fsl_spdif_rx_vbit_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
+ struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(cpu_dai);
+ struct regmap *regmap = spdif_priv->regmap;
+ u32 val;
+
+ regmap_read(regmap, REG_SPDIF_SIS, &val);
+ ucontrol->value.integer.value[0] = (val & INT_VAL_NOGOOD) != 0;
+ regmap_write(regmap, REG_SPDIF_SIC, INT_VAL_NOGOOD);
+
+ return 0;
+}
+
+static int fsl_spdif_tx_vbit_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
+ struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(cpu_dai);
+ struct regmap *regmap = spdif_priv->regmap;
+ u32 val;
+
+ regmap_read(regmap, REG_SPDIF_SCR, &val);
+ val = (val & SCR_VAL_MASK) >> SCR_VAL_OFFSET;
+ val = 1 - val;
+ ucontrol->value.integer.value[0] = val;
+
+ return 0;
+}
+
+static int fsl_spdif_tx_vbit_put(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
+ struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(cpu_dai);
+ struct regmap *regmap = spdif_priv->regmap;
+ u32 val = (1 - ucontrol->value.integer.value[0]) << SCR_VAL_OFFSET;
+
+ regmap_update_bits(regmap, REG_SPDIF_SCR, SCR_VAL_MASK, val);
+
+ return 0;
+}
+
+static int fsl_spdif_rx_rcm_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
+ struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(cpu_dai);
+ struct regmap *regmap = spdif_priv->regmap;
+ u32 val;
+
+ regmap_read(regmap, REG_SPDIF_SCR, &val);
+ val = (val & SCR_RAW_CAPTURE_MODE) ? 1 : 0;
+ ucontrol->value.integer.value[0] = val;
+
+ return 0;
+}
+
+static int fsl_spdif_rx_rcm_put(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
+ struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(cpu_dai);
+ struct regmap *regmap = spdif_priv->regmap;
+ u32 val = (ucontrol->value.integer.value[0] ? SCR_RAW_CAPTURE_MODE : 0);
+
+ if (val)
+ cpu_dai->driver->capture.formats |= SNDRV_PCM_FMTBIT_S32_LE;
+ else
+ cpu_dai->driver->capture.formats &= ~SNDRV_PCM_FMTBIT_S32_LE;
+
+ regmap_update_bits(regmap, REG_SPDIF_SCR, SCR_RAW_CAPTURE_MODE, val);
+
+ return 0;
+}
+
+static int fsl_spdif_bypass_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
+ struct fsl_spdif_priv *priv = snd_soc_dai_get_drvdata(dai);
+
+ ucontrol->value.integer.value[0] = priv->bypass ? 1 : 0;
+
+ return 0;
+}
+
+static int fsl_spdif_bypass_put(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_dai *dai = snd_kcontrol_chip(kcontrol);
+ struct fsl_spdif_priv *priv = snd_soc_dai_get_drvdata(dai);
+ struct snd_soc_card *card = dai->component->card;
+ bool set = (ucontrol->value.integer.value[0] != 0);
+ struct regmap *regmap = priv->regmap;
+ struct snd_soc_pcm_runtime *rtd;
+ u32 scr, mask;
+ int stream;
+
+ rtd = snd_soc_get_pcm_runtime(card, card->dai_link);
+
+ if (priv->bypass == set)
+ return 0; /* nothing to do */
+
+ if (snd_soc_dai_active(dai)) {
+ dev_err(dai->dev, "Cannot change BYPASS mode while stream is running.\n");
+ return -EBUSY;
+ }
+
+ pm_runtime_get_sync(dai->dev);
+
+ if (set) {
+ /* Disable interrupts */
+ regmap_update_bits(regmap, REG_SPDIF_SIE, 0xffffff, 0);
+
+ /* Configure BYPASS mode */
+ scr = SCR_TXSEL_RX | SCR_RXFIFO_OFF;
+ mask = SCR_RXFIFO_FSEL_MASK | SCR_RXFIFO_AUTOSYNC_MASK |
+ SCR_RXFIFO_CTL_MASK | SCR_RXFIFO_OFF_MASK | SCR_TXSEL_MASK;
+ /* Power up SPDIF module */
+ mask |= SCR_LOW_POWER;
+ } else {
+ /* Power down SPDIF module, disable TX */
+ scr = SCR_LOW_POWER | SCR_TXSEL_OFF;
+ mask = SCR_LOW_POWER | SCR_TXSEL_MASK;
+ }
+
+ regmap_update_bits(regmap, REG_SPDIF_SCR, mask, scr);
+
+ /* Disable playback & capture if BYPASS mode is enabled, enable otherwise */
+ for_each_pcm_streams(stream)
+ rtd->pcm->streams[stream].substream_count = (set ? 0 : 1);
+
+ priv->bypass = set;
+ pm_runtime_put_sync(dai->dev);
+
+ return 0;
+}
+
+/* DPLL lock information */
+static int fsl_spdif_rxrate_info(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_info *uinfo)
+{
+ uinfo->type = SNDRV_CTL_ELEM_TYPE_INTEGER;
+ uinfo->count = 1;
+ uinfo->value.integer.min = 16000;
+ uinfo->value.integer.max = 192000;
+
+ return 0;
+}
+
+static u32 gainsel_multi[GAINSEL_MULTI_MAX] = {
+ 24, 16, 12, 8, 6, 4, 3,
+};
+
+/* Get RX data clock rate given the SPDIF bus_clk */
+static int spdif_get_rxclk_rate(struct fsl_spdif_priv *spdif_priv,
+ enum spdif_gainsel gainsel)
+{
+ struct regmap *regmap = spdif_priv->regmap;
+ struct platform_device *pdev = spdif_priv->pdev;
+ u64 tmpval64, busclk_freq = 0;
+ u32 freqmeas, phaseconf;
+ u8 clksrc;
+
+ regmap_read(regmap, REG_SPDIF_SRFM, &freqmeas);
+ regmap_read(regmap, REG_SPDIF_SRPC, &phaseconf);
+
+ clksrc = (phaseconf >> SRPC_CLKSRC_SEL_OFFSET) & 0xf;
+
+ /* Get bus clock from system */
+ if (srpc_dpll_locked[clksrc] && (phaseconf & SRPC_DPLL_LOCKED))
+ busclk_freq = clk_get_rate(spdif_priv->sysclk);
+
+ /* FreqMeas_CLK = (BUS_CLK * FreqMeas) / 2 ^ 10 / GAINSEL / 128 */
+ tmpval64 = (u64) busclk_freq * freqmeas;
+ do_div(tmpval64, gainsel_multi[gainsel] * 1024);
+ do_div(tmpval64, 128 * 1024);
+
+ dev_dbg(&pdev->dev, "FreqMeas: %d\n", freqmeas);
+ dev_dbg(&pdev->dev, "BusclkFreq: %lld\n", busclk_freq);
+ dev_dbg(&pdev->dev, "RxRate: %lld\n", tmpval64);
+
+ return (int)tmpval64;
+}
+
+/*
+ * Get DPLL lock or not info from stable interrupt status register.
+ * User application must use this control to get locked,
+ * then can do next PCM operation
+ */
+static int fsl_spdif_rxrate_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
+ struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(cpu_dai);
+ int rate = 0;
+
+ if (spdif_priv->dpll_locked)
+ rate = spdif_get_rxclk_rate(spdif_priv, SPDIF_DEFAULT_GAINSEL);
+
+ ucontrol->value.integer.value[0] = rate;
+
+ return 0;
+}
+
+/*
+ * User bit sync mode:
+ * 1 CD User channel subcode
+ * 0 Non-CD data
+ */
+static int fsl_spdif_usync_get(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
+ struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(cpu_dai);
+ struct regmap *regmap = spdif_priv->regmap;
+ u32 val;
+
+ regmap_read(regmap, REG_SPDIF_SRCD, &val);
+ ucontrol->value.integer.value[0] = (val & SRCD_CD_USER) != 0;
+
+ return 0;
+}
+
+/*
+ * User bit sync mode:
+ * 1 CD User channel subcode
+ * 0 Non-CD data
+ */
+static int fsl_spdif_usync_put(struct snd_kcontrol *kcontrol,
+ struct snd_ctl_elem_value *ucontrol)
+{
+ struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
+ struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(cpu_dai);
+ struct regmap *regmap = spdif_priv->regmap;
+ u32 val = ucontrol->value.integer.value[0] << SRCD_CD_USER_OFFSET;
+
+ regmap_update_bits(regmap, REG_SPDIF_SRCD, SRCD_CD_USER, val);
+
+ return 0;
+}
+
+/* FSL SPDIF IEC958 controller defines */
+static struct snd_kcontrol_new fsl_spdif_ctrls[] = {
+ /* Status cchanel controller */
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_MIXER,
+ .name = SNDRV_CTL_NAME_IEC958("", PLAYBACK, DEFAULT),
+ .access = SNDRV_CTL_ELEM_ACCESS_READ |
+ SNDRV_CTL_ELEM_ACCESS_WRITE |
+ SNDRV_CTL_ELEM_ACCESS_VOLATILE,
+ .info = fsl_spdif_info,
+ .get = fsl_spdif_pb_get,
+ .put = fsl_spdif_pb_put,
+ },
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_PCM,
+ .name = SNDRV_CTL_NAME_IEC958("", CAPTURE, DEFAULT),
+ .access = SNDRV_CTL_ELEM_ACCESS_READ |
+ SNDRV_CTL_ELEM_ACCESS_VOLATILE,
+ .info = fsl_spdif_info,
+ .get = fsl_spdif_capture_get,
+ },
+ /* User bits controller */
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_PCM,
+ .name = "IEC958 Subcode Capture Default",
+ .access = SNDRV_CTL_ELEM_ACCESS_READ |
+ SNDRV_CTL_ELEM_ACCESS_VOLATILE,
+ .info = fsl_spdif_info,
+ .get = fsl_spdif_subcode_get,
+ },
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_PCM,
+ .name = "IEC958 Q-subcode Capture Default",
+ .access = SNDRV_CTL_ELEM_ACCESS_READ |
+ SNDRV_CTL_ELEM_ACCESS_VOLATILE,
+ .info = fsl_spdif_qinfo,
+ .get = fsl_spdif_qget,
+ },
+ /* Valid bit error controller */
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_PCM,
+ .name = "IEC958 RX V-Bit Errors",
+ .access = SNDRV_CTL_ELEM_ACCESS_READ |
+ SNDRV_CTL_ELEM_ACCESS_VOLATILE,
+ .info = snd_ctl_boolean_mono_info,
+ .get = fsl_spdif_rx_vbit_get,
+ },
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_PCM,
+ .name = "IEC958 TX V-Bit",
+ .access = SNDRV_CTL_ELEM_ACCESS_READ |
+ SNDRV_CTL_ELEM_ACCESS_WRITE |
+ SNDRV_CTL_ELEM_ACCESS_VOLATILE,
+ .info = snd_ctl_boolean_mono_info,
+ .get = fsl_spdif_tx_vbit_get,
+ .put = fsl_spdif_tx_vbit_put,
+ },
+ /* DPLL lock info get controller */
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_PCM,
+ .name = RX_SAMPLE_RATE_KCONTROL,
+ .access = SNDRV_CTL_ELEM_ACCESS_READ |
+ SNDRV_CTL_ELEM_ACCESS_VOLATILE,
+ .info = fsl_spdif_rxrate_info,
+ .get = fsl_spdif_rxrate_get,
+ },
+ /* RX bypass controller */
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_PCM,
+ .name = "Bypass Mode",
+ .access = SNDRV_CTL_ELEM_ACCESS_READWRITE,
+ .info = snd_ctl_boolean_mono_info,
+ .get = fsl_spdif_bypass_get,
+ .put = fsl_spdif_bypass_put,
+ },
+ /* User bit sync mode set/get controller */
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_PCM,
+ .name = "IEC958 USyncMode CDText",
+ .access = SNDRV_CTL_ELEM_ACCESS_READ |
+ SNDRV_CTL_ELEM_ACCESS_WRITE |
+ SNDRV_CTL_ELEM_ACCESS_VOLATILE,
+ .info = snd_ctl_boolean_mono_info,
+ .get = fsl_spdif_usync_get,
+ .put = fsl_spdif_usync_put,
+ },
+};
+
+static struct snd_kcontrol_new fsl_spdif_ctrls_rcm[] = {
+ {
+ .iface = SNDRV_CTL_ELEM_IFACE_PCM,
+ .name = "IEC958 Raw Capture Mode",
+ .access = SNDRV_CTL_ELEM_ACCESS_READ |
+ SNDRV_CTL_ELEM_ACCESS_WRITE |
+ SNDRV_CTL_ELEM_ACCESS_VOLATILE,
+ .info = snd_ctl_boolean_mono_info,
+ .get = fsl_spdif_rx_rcm_get,
+ .put = fsl_spdif_rx_rcm_put,
+ },
+};
+
+static int fsl_spdif_dai_probe(struct snd_soc_dai *dai)
+{
+ struct fsl_spdif_priv *spdif_private = snd_soc_dai_get_drvdata(dai);
+
+ snd_soc_dai_init_dma_data(dai, &spdif_private->dma_params_tx,
+ &spdif_private->dma_params_rx);
+
+ snd_soc_add_dai_controls(dai, fsl_spdif_ctrls, ARRAY_SIZE(fsl_spdif_ctrls));
+
+ if (spdif_private->soc->raw_capture_mode)
+ snd_soc_add_dai_controls(dai, fsl_spdif_ctrls_rcm,
+ ARRAY_SIZE(fsl_spdif_ctrls_rcm));
+
+ spdif_private->snd_card = dai->component->card->snd_card;
+ spdif_private->rxrate_kcontrol = snd_soc_card_get_kcontrol(dai->component->card,
+ RX_SAMPLE_RATE_KCONTROL);
+ if (!spdif_private->rxrate_kcontrol)
+ dev_err(&spdif_private->pdev->dev, "failed to get %s kcontrol\n",
+ RX_SAMPLE_RATE_KCONTROL);
+
+ /*Clear the val bit for Tx*/
+ regmap_update_bits(spdif_private->regmap, REG_SPDIF_SCR,
+ SCR_VAL_MASK, SCR_VAL_CLEAR);
+
+ return 0;
+}
+
+static const struct snd_soc_dai_ops fsl_spdif_dai_ops = {
+ .probe = fsl_spdif_dai_probe,
+ .startup = fsl_spdif_startup,
+ .hw_params = fsl_spdif_hw_params,
+ .trigger = fsl_spdif_trigger,
+ .shutdown = fsl_spdif_shutdown,
+};
+
+static struct snd_soc_dai_driver fsl_spdif_dai = {
+ .playback = {
+ .stream_name = "CPU-Playback",
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = FSL_SPDIF_RATES_PLAYBACK,
+ .formats = FSL_SPDIF_FORMATS_PLAYBACK,
+ },
+ .capture = {
+ .stream_name = "CPU-Capture",
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = FSL_SPDIF_RATES_CAPTURE,
+ .formats = FSL_SPDIF_FORMATS_CAPTURE,
+ },
+ .ops = &fsl_spdif_dai_ops,
+};
+
+static const struct snd_soc_component_driver fsl_spdif_component = {
+ .name = "fsl-spdif",
+ .legacy_dai_naming = 1,
+};
+
+/* FSL SPDIF REGMAP */
+static const struct reg_default fsl_spdif_reg_defaults[] = {
+ {REG_SPDIF_SCR, 0x00000400},
+ {REG_SPDIF_SRCD, 0x00000000},
+ {REG_SPDIF_SIE, 0x00000000},
+ {REG_SPDIF_STL, 0x00000000},
+ {REG_SPDIF_STR, 0x00000000},
+ {REG_SPDIF_STCSCH, 0x00000000},
+ {REG_SPDIF_STCSCL, 0x00000000},
+ {REG_SPDIF_STCSPH, 0x00000000},
+ {REG_SPDIF_STCSPL, 0x00000000},
+ {REG_SPDIF_STC, 0x00020f00},
+};
+
+static bool fsl_spdif_readable_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case REG_SPDIF_SCR:
+ case REG_SPDIF_SRCD:
+ case REG_SPDIF_SRPC:
+ case REG_SPDIF_SIE:
+ case REG_SPDIF_SIS:
+ case REG_SPDIF_SRL:
+ case REG_SPDIF_SRR:
+ case REG_SPDIF_SRCSH:
+ case REG_SPDIF_SRCSL:
+ case REG_SPDIF_SRU:
+ case REG_SPDIF_SRQ:
+ case REG_SPDIF_STCSCH:
+ case REG_SPDIF_STCSCL:
+ case REG_SPDIF_STCSPH:
+ case REG_SPDIF_STCSPL:
+ case REG_SPDIF_SRFM:
+ case REG_SPDIF_STC:
+ case REG_SPDIF_SRCCA_31_0:
+ case REG_SPDIF_SRCCA_63_32:
+ case REG_SPDIF_SRCCA_95_64:
+ case REG_SPDIF_SRCCA_127_96:
+ case REG_SPDIF_SRCCA_159_128:
+ case REG_SPDIF_SRCCA_191_160:
+ case REG_SPDIF_STCCA_31_0:
+ case REG_SPDIF_STCCA_63_32:
+ case REG_SPDIF_STCCA_95_64:
+ case REG_SPDIF_STCCA_127_96:
+ case REG_SPDIF_STCCA_159_128:
+ case REG_SPDIF_STCCA_191_160:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static bool fsl_spdif_volatile_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case REG_SPDIF_SRPC:
+ case REG_SPDIF_SIS:
+ case REG_SPDIF_SRL:
+ case REG_SPDIF_SRR:
+ case REG_SPDIF_SRCSH:
+ case REG_SPDIF_SRCSL:
+ case REG_SPDIF_SRU:
+ case REG_SPDIF_SRQ:
+ case REG_SPDIF_SRFM:
+ case REG_SPDIF_SRCCA_31_0:
+ case REG_SPDIF_SRCCA_63_32:
+ case REG_SPDIF_SRCCA_95_64:
+ case REG_SPDIF_SRCCA_127_96:
+ case REG_SPDIF_SRCCA_159_128:
+ case REG_SPDIF_SRCCA_191_160:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static bool fsl_spdif_writeable_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case REG_SPDIF_SCR:
+ case REG_SPDIF_SRCD:
+ case REG_SPDIF_SRPC:
+ case REG_SPDIF_SIE:
+ case REG_SPDIF_SIC:
+ case REG_SPDIF_STL:
+ case REG_SPDIF_STR:
+ case REG_SPDIF_STCSCH:
+ case REG_SPDIF_STCSCL:
+ case REG_SPDIF_STCSPH:
+ case REG_SPDIF_STCSPL:
+ case REG_SPDIF_STC:
+ case REG_SPDIF_STCCA_31_0:
+ case REG_SPDIF_STCCA_63_32:
+ case REG_SPDIF_STCCA_95_64:
+ case REG_SPDIF_STCCA_127_96:
+ case REG_SPDIF_STCCA_159_128:
+ case REG_SPDIF_STCCA_191_160:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static const struct regmap_config fsl_spdif_regmap_config = {
+ .reg_bits = 32,
+ .reg_stride = 4,
+ .val_bits = 32,
+
+ .max_register = REG_SPDIF_STCCA_191_160,
+ .reg_defaults = fsl_spdif_reg_defaults,
+ .num_reg_defaults = ARRAY_SIZE(fsl_spdif_reg_defaults),
+ .readable_reg = fsl_spdif_readable_reg,
+ .volatile_reg = fsl_spdif_volatile_reg,
+ .writeable_reg = fsl_spdif_writeable_reg,
+ .cache_type = REGCACHE_FLAT,
+};
+
+static u32 fsl_spdif_txclk_caldiv(struct fsl_spdif_priv *spdif_priv,
+ struct clk *clk, u64 savesub,
+ enum spdif_txrate index, bool round)
+{
+ static const u32 rate[] = { 22050, 32000, 44100, 48000, 88200, 96000, 176400,
+ 192000, };
+ bool is_sysclk = clk_is_match(clk, spdif_priv->sysclk);
+ u64 rate_ideal, rate_actual, sub;
+ u32 arate;
+ u16 sysclk_dfmin, sysclk_dfmax, sysclk_df;
+ u8 txclk_df;
+
+ /* The sysclk has an extra divisor [2, 512] */
+ sysclk_dfmin = is_sysclk ? 2 : 1;
+ sysclk_dfmax = is_sysclk ? 512 : 1;
+
+ for (sysclk_df = sysclk_dfmin; sysclk_df <= sysclk_dfmax; sysclk_df++) {
+ for (txclk_df = 1; txclk_df <= 128; txclk_df++) {
+ rate_ideal = rate[index] * txclk_df * 64ULL;
+ if (round)
+ rate_actual = clk_round_rate(clk, rate_ideal);
+ else
+ rate_actual = clk_get_rate(clk);
+
+ arate = rate_actual / 64;
+ arate /= txclk_df * sysclk_df;
+
+ if (arate == rate[index]) {
+ /* We are lucky */
+ savesub = 0;
+ spdif_priv->txclk_df[index] = txclk_df;
+ spdif_priv->sysclk_df[index] = sysclk_df;
+ spdif_priv->txrate[index] = arate;
+ goto out;
+ } else if (arate / rate[index] == 1) {
+ /* A little bigger than expect */
+ sub = (u64)(arate - rate[index]) * 100000;
+ do_div(sub, rate[index]);
+ if (sub >= savesub)
+ continue;
+ savesub = sub;
+ spdif_priv->txclk_df[index] = txclk_df;
+ spdif_priv->sysclk_df[index] = sysclk_df;
+ spdif_priv->txrate[index] = arate;
+ } else if (rate[index] / arate == 1) {
+ /* A little smaller than expect */
+ sub = (u64)(rate[index] - arate) * 100000;
+ do_div(sub, rate[index]);
+ if (sub >= savesub)
+ continue;
+ savesub = sub;
+ spdif_priv->txclk_df[index] = txclk_df;
+ spdif_priv->sysclk_df[index] = sysclk_df;
+ spdif_priv->txrate[index] = arate;
+ }
+ }
+ }
+
+out:
+ return savesub;
+}
+
+static int fsl_spdif_probe_txclk(struct fsl_spdif_priv *spdif_priv,
+ enum spdif_txrate index)
+{
+ static const u32 rate[] = { 22050, 32000, 44100, 48000, 88200, 96000, 176400,
+ 192000, };
+ struct platform_device *pdev = spdif_priv->pdev;
+ struct device *dev = &pdev->dev;
+ u64 savesub = 100000, ret;
+ struct clk *clk;
+ int i;
+
+ for (i = 0; i < STC_TXCLK_SRC_MAX; i++) {
+ clk = spdif_priv->txclk[i];
+ if (IS_ERR(clk)) {
+ dev_err(dev, "no rxtx%d clock in devicetree\n", i);
+ return PTR_ERR(clk);
+ }
+ if (!clk_get_rate(clk))
+ continue;
+
+ ret = fsl_spdif_txclk_caldiv(spdif_priv, clk, savesub, index,
+ fsl_spdif_can_set_clk_rate(spdif_priv, i));
+ if (savesub == ret)
+ continue;
+
+ savesub = ret;
+ spdif_priv->txclk_src[index] = i;
+
+ /* To quick catch a divisor, we allow a 0.1% deviation */
+ if (savesub < 100)
+ break;
+ }
+
+ dev_dbg(dev, "use rxtx%d as tx clock source for %dHz sample rate\n",
+ spdif_priv->txclk_src[index], rate[index]);
+ dev_dbg(dev, "use txclk df %d for %dHz sample rate\n",
+ spdif_priv->txclk_df[index], rate[index]);
+ if (clk_is_match(spdif_priv->txclk[spdif_priv->txclk_src[index]], spdif_priv->sysclk))
+ dev_dbg(dev, "use sysclk df %d for %dHz sample rate\n",
+ spdif_priv->sysclk_df[index], rate[index]);
+ dev_dbg(dev, "the best rate for %dHz sample rate is %dHz\n",
+ rate[index], spdif_priv->txrate[index]);
+
+ return 0;
+}
+
+static int fsl_spdif_probe(struct platform_device *pdev)
+{
+ struct fsl_spdif_priv *spdif_priv;
+ struct spdif_mixer_control *ctrl;
+ struct resource *res;
+ void __iomem *regs;
+ int irq, ret, i;
+ char tmp[16];
+
+ spdif_priv = devm_kzalloc(&pdev->dev, sizeof(*spdif_priv), GFP_KERNEL);
+ if (!spdif_priv)
+ return -ENOMEM;
+
+ spdif_priv->pdev = pdev;
+
+ spdif_priv->soc = of_device_get_match_data(&pdev->dev);
+
+ /* Initialize this copy of the CPU DAI driver structure */
+ memcpy(&spdif_priv->cpu_dai_drv, &fsl_spdif_dai, sizeof(fsl_spdif_dai));
+ spdif_priv->cpu_dai_drv.name = dev_name(&pdev->dev);
+ spdif_priv->cpu_dai_drv.playback.formats =
+ spdif_priv->soc->tx_formats;
+
+ /* Get the addresses and IRQ */
+ regs = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
+ if (IS_ERR(regs))
+ return PTR_ERR(regs);
+
+ spdif_priv->regmap = devm_regmap_init_mmio(&pdev->dev, regs, &fsl_spdif_regmap_config);
+ if (IS_ERR(spdif_priv->regmap)) {
+ dev_err(&pdev->dev, "regmap init failed\n");
+ return PTR_ERR(spdif_priv->regmap);
+ }
+
+ for (i = 0; i < spdif_priv->soc->interrupts; i++) {
+ irq = platform_get_irq(pdev, i);
+ if (irq < 0)
+ return irq;
+
+ ret = devm_request_irq(&pdev->dev, irq, spdif_isr, 0,
+ dev_name(&pdev->dev), spdif_priv);
+ if (ret) {
+ dev_err(&pdev->dev, "could not claim irq %u\n", irq);
+ return ret;
+ }
+ }
+
+ for (i = 0; i < STC_TXCLK_SRC_MAX; i++) {
+ sprintf(tmp, "rxtx%d", i);
+ spdif_priv->txclk[i] = devm_clk_get(&pdev->dev, tmp);
+ if (IS_ERR(spdif_priv->txclk[i])) {
+ dev_err(&pdev->dev, "no rxtx%d clock in devicetree\n", i);
+ return PTR_ERR(spdif_priv->txclk[i]);
+ }
+ }
+
+ /* Get system clock for rx clock rate calculation */
+ spdif_priv->sysclk = spdif_priv->txclk[5];
+ if (IS_ERR(spdif_priv->sysclk)) {
+ dev_err(&pdev->dev, "no sys clock (rxtx5) in devicetree\n");
+ return PTR_ERR(spdif_priv->sysclk);
+ }
+
+ /* Get core clock for data register access via DMA */
+ spdif_priv->coreclk = devm_clk_get(&pdev->dev, "core");
+ if (IS_ERR(spdif_priv->coreclk)) {
+ dev_err(&pdev->dev, "no core clock in devicetree\n");
+ return PTR_ERR(spdif_priv->coreclk);
+ }
+
+ spdif_priv->spbaclk = devm_clk_get(&pdev->dev, "spba");
+ if (IS_ERR(spdif_priv->spbaclk))
+ dev_warn(&pdev->dev, "no spba clock in devicetree\n");
+
+ /* Select clock source for rx/tx clock */
+ spdif_priv->rxclk = spdif_priv->txclk[1];
+ if (IS_ERR(spdif_priv->rxclk)) {
+ dev_err(&pdev->dev, "no rxtx1 clock in devicetree\n");
+ return PTR_ERR(spdif_priv->rxclk);
+ }
+ spdif_priv->rxclk_src = DEFAULT_RXCLK_SRC;
+
+ fsl_asoc_get_pll_clocks(&pdev->dev, &spdif_priv->pll8k_clk,
+ &spdif_priv->pll11k_clk);
+
+ /* Initial spinlock for control data */
+ ctrl = &spdif_priv->fsl_spdif_control;
+ spin_lock_init(&ctrl->ctl_lock);
+
+ /* Init tx channel status default value */
+ ctrl->ch_status[0] = IEC958_AES0_CON_NOT_COPYRIGHT |
+ IEC958_AES0_CON_EMPHASIS_5015;
+ ctrl->ch_status[1] = IEC958_AES1_CON_DIGDIGCONV_ID;
+ ctrl->ch_status[2] = 0x00;
+ ctrl->ch_status[3] = IEC958_AES3_CON_FS_44100 |
+ IEC958_AES3_CON_CLOCK_1000PPM;
+
+ spdif_priv->dpll_locked = false;
+
+ spdif_priv->dma_params_tx.maxburst = spdif_priv->soc->tx_burst;
+ spdif_priv->dma_params_rx.maxburst = spdif_priv->soc->rx_burst;
+ spdif_priv->dma_params_tx.addr = res->start + REG_SPDIF_STL;
+ spdif_priv->dma_params_rx.addr = res->start + REG_SPDIF_SRL;
+
+ /* Register with ASoC */
+ dev_set_drvdata(&pdev->dev, spdif_priv);
+ pm_runtime_enable(&pdev->dev);
+ regcache_cache_only(spdif_priv->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 = imx_pcm_dma_init(pdev);
+ if (ret) {
+ dev_err_probe(&pdev->dev, ret, "imx_pcm_dma_init failed\n");
+ goto err_pm_disable;
+ }
+
+ ret = devm_snd_soc_register_component(&pdev->dev, &fsl_spdif_component,
+ &spdif_priv->cpu_dai_drv, 1);
+ if (ret) {
+ dev_err(&pdev->dev, "failed to register DAI: %d\n", ret);
+ goto err_pm_disable;
+ }
+
+ return ret;
+
+err_pm_disable:
+ pm_runtime_disable(&pdev->dev);
+ return ret;
+}
+
+static void fsl_spdif_remove(struct platform_device *pdev)
+{
+ pm_runtime_disable(&pdev->dev);
+}
+
+#ifdef CONFIG_PM
+static int fsl_spdif_runtime_suspend(struct device *dev)
+{
+ struct fsl_spdif_priv *spdif_priv = dev_get_drvdata(dev);
+ int i;
+
+ /* Disable all the interrupts */
+ regmap_update_bits(spdif_priv->regmap, REG_SPDIF_SIE, 0xffffff, 0);
+
+ regmap_read(spdif_priv->regmap, REG_SPDIF_SRPC,
+ &spdif_priv->regcache_srpc);
+ regcache_cache_only(spdif_priv->regmap, true);
+
+ for (i = 0; i < STC_TXCLK_SRC_MAX; i++)
+ clk_disable_unprepare(spdif_priv->txclk[i]);
+
+ if (!IS_ERR(spdif_priv->spbaclk))
+ clk_disable_unprepare(spdif_priv->spbaclk);
+ clk_disable_unprepare(spdif_priv->coreclk);
+
+ return 0;
+}
+
+static int fsl_spdif_runtime_resume(struct device *dev)
+{
+ struct fsl_spdif_priv *spdif_priv = dev_get_drvdata(dev);
+ int ret;
+ int i;
+
+ ret = clk_prepare_enable(spdif_priv->coreclk);
+ if (ret) {
+ dev_err(dev, "failed to enable core clock\n");
+ return ret;
+ }
+
+ if (!IS_ERR(spdif_priv->spbaclk)) {
+ ret = clk_prepare_enable(spdif_priv->spbaclk);
+ if (ret) {
+ dev_err(dev, "failed to enable spba clock\n");
+ goto disable_core_clk;
+ }
+ }
+
+ for (i = 0; i < STC_TXCLK_SRC_MAX; i++) {
+ ret = clk_prepare_enable(spdif_priv->txclk[i]);
+ if (ret)
+ goto disable_tx_clk;
+ }
+
+ regcache_cache_only(spdif_priv->regmap, false);
+ regcache_mark_dirty(spdif_priv->regmap);
+
+ regmap_update_bits(spdif_priv->regmap, REG_SPDIF_SRPC,
+ SRPC_CLKSRC_SEL_MASK | SRPC_GAINSEL_MASK,
+ spdif_priv->regcache_srpc);
+
+ ret = regcache_sync(spdif_priv->regmap);
+ if (ret)
+ goto disable_tx_clk;
+
+ return 0;
+
+disable_tx_clk:
+ for (i--; i >= 0; i--)
+ clk_disable_unprepare(spdif_priv->txclk[i]);
+ if (!IS_ERR(spdif_priv->spbaclk))
+ clk_disable_unprepare(spdif_priv->spbaclk);
+disable_core_clk:
+ clk_disable_unprepare(spdif_priv->coreclk);
+
+ return ret;
+}
+#endif /* CONFIG_PM */
+
+static const struct dev_pm_ops fsl_spdif_pm = {
+ SET_SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend,
+ pm_runtime_force_resume)
+ SET_RUNTIME_PM_OPS(fsl_spdif_runtime_suspend, fsl_spdif_runtime_resume,
+ NULL)
+};
+
+static const struct of_device_id fsl_spdif_dt_ids[] = {
+ { .compatible = "fsl,imx35-spdif", .data = &fsl_spdif_imx35, },
+ { .compatible = "fsl,vf610-spdif", .data = &fsl_spdif_vf610, },
+ { .compatible = "fsl,imx6sx-spdif", .data = &fsl_spdif_imx6sx, },
+ { .compatible = "fsl,imx8qm-spdif", .data = &fsl_spdif_imx8qm, },
+ { .compatible = "fsl,imx8mm-spdif", .data = &fsl_spdif_imx8mm, },
+ { .compatible = "fsl,imx8ulp-spdif", .data = &fsl_spdif_imx8ulp, },
+ {}
+};
+MODULE_DEVICE_TABLE(of, fsl_spdif_dt_ids);
+
+static struct platform_driver fsl_spdif_driver = {
+ .driver = {
+ .name = "fsl-spdif-dai",
+ .of_match_table = fsl_spdif_dt_ids,
+ .pm = &fsl_spdif_pm,
+ },
+ .probe = fsl_spdif_probe,
+ .remove_new = fsl_spdif_remove,
+};
+
+module_platform_driver(fsl_spdif_driver);
+
+MODULE_AUTHOR("Freescale Semiconductor, Inc.");
+MODULE_DESCRIPTION("Freescale S/PDIF CPU DAI Driver");
+MODULE_LICENSE("GPL v2");
+MODULE_ALIAS("platform:fsl-spdif-dai");