1383 строки
38 KiB
C
1383 строки
38 KiB
C
// SPDX-License-Identifier: GPL-2.0
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//
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// Freescale S/PDIF ALSA SoC Digital Audio Interface (DAI) driver
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//
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// Copyright (C) 2013 Freescale Semiconductor, Inc.
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//
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// Based on stmp3xxx_spdif_dai.c
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// Vladimir Barinov <vbarinov@embeddedalley.com>
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// Copyright 2008 SigmaTel, Inc
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// Copyright 2008 Embedded Alley Solutions, Inc
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#include <linux/bitrev.h>
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#include <linux/clk.h>
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#include <linux/module.h>
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#include <linux/of_address.h>
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#include <linux/of_device.h>
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#include <linux/of_irq.h>
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#include <linux/regmap.h>
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#include <sound/asoundef.h>
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#include <sound/dmaengine_pcm.h>
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#include <sound/soc.h>
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#include "fsl_spdif.h"
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#include "imx-pcm.h"
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#define FSL_SPDIF_TXFIFO_WML 0x8
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#define FSL_SPDIF_RXFIFO_WML 0x8
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#define INTR_FOR_PLAYBACK (INT_TXFIFO_RESYNC)
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#define INTR_FOR_CAPTURE (INT_SYM_ERR | INT_BIT_ERR | INT_URX_FUL |\
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INT_URX_OV | INT_QRX_FUL | INT_QRX_OV |\
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INT_UQ_SYNC | INT_UQ_ERR | INT_RXFIFO_RESYNC |\
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INT_LOSS_LOCK | INT_DPLL_LOCKED)
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#define SIE_INTR_FOR(tx) (tx ? INTR_FOR_PLAYBACK : INTR_FOR_CAPTURE)
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/* Index list for the values that has if (DPLL Locked) condition */
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static u8 srpc_dpll_locked[] = { 0x0, 0x1, 0x2, 0x3, 0x4, 0xa, 0xb };
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#define SRPC_NODPLL_START1 0x5
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#define SRPC_NODPLL_START2 0xc
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#define DEFAULT_RXCLK_SRC 1
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/*
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* SPDIF control structure
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* Defines channel status, subcode and Q sub
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*/
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struct spdif_mixer_control {
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/* spinlock to access control data */
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spinlock_t ctl_lock;
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/* IEC958 channel tx status bit */
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unsigned char ch_status[4];
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/* User bits */
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unsigned char subcode[2 * SPDIF_UBITS_SIZE];
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/* Q subcode part of user bits */
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unsigned char qsub[2 * SPDIF_QSUB_SIZE];
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/* Buffer offset for U/Q */
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u32 upos;
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u32 qpos;
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/* Ready buffer index of the two buffers */
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u32 ready_buf;
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};
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/**
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* fsl_spdif_priv: Freescale SPDIF private data
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*
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* @fsl_spdif_control: SPDIF control data
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* @cpu_dai_drv: cpu dai driver
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* @pdev: platform device pointer
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* @regmap: regmap handler
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* @dpll_locked: dpll lock flag
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* @txrate: the best rates for playback
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* @txclk_df: STC_TXCLK_DF dividers value for playback
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* @sysclk_df: STC_SYSCLK_DF dividers value for playback
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* @txclk_src: STC_TXCLK_SRC values for playback
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* @rxclk_src: SRPC_CLKSRC_SEL values for capture
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* @txclk: tx clock sources for playback
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* @rxclk: rx clock sources for capture
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* @coreclk: core clock for register access via DMA
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* @sysclk: system clock for rx clock rate measurement
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* @spbaclk: SPBA clock (optional, depending on SoC design)
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* @dma_params_tx: DMA parameters for transmit channel
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* @dma_params_rx: DMA parameters for receive channel
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*/
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struct fsl_spdif_priv {
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struct spdif_mixer_control fsl_spdif_control;
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struct snd_soc_dai_driver cpu_dai_drv;
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struct platform_device *pdev;
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struct regmap *regmap;
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bool dpll_locked;
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u32 txrate[SPDIF_TXRATE_MAX];
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u8 txclk_df[SPDIF_TXRATE_MAX];
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u16 sysclk_df[SPDIF_TXRATE_MAX];
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u8 txclk_src[SPDIF_TXRATE_MAX];
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u8 rxclk_src;
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struct clk *txclk[SPDIF_TXRATE_MAX];
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struct clk *rxclk;
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struct clk *coreclk;
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struct clk *sysclk;
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struct clk *spbaclk;
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struct snd_dmaengine_dai_dma_data dma_params_tx;
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struct snd_dmaengine_dai_dma_data dma_params_rx;
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/* regcache for SRPC */
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u32 regcache_srpc;
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};
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/* DPLL locked and lock loss interrupt handler */
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static void spdif_irq_dpll_lock(struct fsl_spdif_priv *spdif_priv)
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{
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struct regmap *regmap = spdif_priv->regmap;
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struct platform_device *pdev = spdif_priv->pdev;
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u32 locked;
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regmap_read(regmap, REG_SPDIF_SRPC, &locked);
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locked &= SRPC_DPLL_LOCKED;
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dev_dbg(&pdev->dev, "isr: Rx dpll %s \n",
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locked ? "locked" : "loss lock");
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spdif_priv->dpll_locked = locked ? true : false;
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}
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/* Receiver found illegal symbol interrupt handler */
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static void spdif_irq_sym_error(struct fsl_spdif_priv *spdif_priv)
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{
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struct regmap *regmap = spdif_priv->regmap;
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struct platform_device *pdev = spdif_priv->pdev;
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dev_dbg(&pdev->dev, "isr: receiver found illegal symbol\n");
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/* Clear illegal symbol if DPLL unlocked since no audio stream */
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if (!spdif_priv->dpll_locked)
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regmap_update_bits(regmap, REG_SPDIF_SIE, INT_SYM_ERR, 0);
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}
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/* U/Q Channel receive register full */
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static void spdif_irq_uqrx_full(struct fsl_spdif_priv *spdif_priv, char name)
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{
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struct spdif_mixer_control *ctrl = &spdif_priv->fsl_spdif_control;
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struct regmap *regmap = spdif_priv->regmap;
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struct platform_device *pdev = spdif_priv->pdev;
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u32 *pos, size, val, reg;
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switch (name) {
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case 'U':
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pos = &ctrl->upos;
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size = SPDIF_UBITS_SIZE;
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reg = REG_SPDIF_SRU;
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break;
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case 'Q':
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pos = &ctrl->qpos;
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size = SPDIF_QSUB_SIZE;
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reg = REG_SPDIF_SRQ;
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break;
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default:
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dev_err(&pdev->dev, "unsupported channel name\n");
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return;
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}
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dev_dbg(&pdev->dev, "isr: %c Channel receive register full\n", name);
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if (*pos >= size * 2) {
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*pos = 0;
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} else if (unlikely((*pos % size) + 3 > size)) {
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dev_err(&pdev->dev, "User bit receive buffer overflow\n");
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return;
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}
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regmap_read(regmap, reg, &val);
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ctrl->subcode[*pos++] = val >> 16;
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ctrl->subcode[*pos++] = val >> 8;
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ctrl->subcode[*pos++] = val;
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}
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/* U/Q Channel sync found */
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static void spdif_irq_uq_sync(struct fsl_spdif_priv *spdif_priv)
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{
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struct spdif_mixer_control *ctrl = &spdif_priv->fsl_spdif_control;
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struct platform_device *pdev = spdif_priv->pdev;
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dev_dbg(&pdev->dev, "isr: U/Q Channel sync found\n");
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/* U/Q buffer reset */
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if (ctrl->qpos == 0)
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return;
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/* Set ready to this buffer */
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ctrl->ready_buf = (ctrl->qpos - 1) / SPDIF_QSUB_SIZE + 1;
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}
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/* U/Q Channel framing error */
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static void spdif_irq_uq_err(struct fsl_spdif_priv *spdif_priv)
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{
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struct spdif_mixer_control *ctrl = &spdif_priv->fsl_spdif_control;
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struct regmap *regmap = spdif_priv->regmap;
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struct platform_device *pdev = spdif_priv->pdev;
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u32 val;
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dev_dbg(&pdev->dev, "isr: U/Q Channel framing error\n");
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/* Read U/Q data to clear the irq and do buffer reset */
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regmap_read(regmap, REG_SPDIF_SRU, &val);
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regmap_read(regmap, REG_SPDIF_SRQ, &val);
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/* Drop this U/Q buffer */
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ctrl->ready_buf = 0;
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ctrl->upos = 0;
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ctrl->qpos = 0;
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}
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/* Get spdif interrupt status and clear the interrupt */
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static u32 spdif_intr_status_clear(struct fsl_spdif_priv *spdif_priv)
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{
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struct regmap *regmap = spdif_priv->regmap;
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u32 val, val2;
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regmap_read(regmap, REG_SPDIF_SIS, &val);
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regmap_read(regmap, REG_SPDIF_SIE, &val2);
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regmap_write(regmap, REG_SPDIF_SIC, val & val2);
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return val;
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}
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static irqreturn_t spdif_isr(int irq, void *devid)
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{
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struct fsl_spdif_priv *spdif_priv = (struct fsl_spdif_priv *)devid;
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struct platform_device *pdev = spdif_priv->pdev;
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u32 sis;
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sis = spdif_intr_status_clear(spdif_priv);
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if (sis & INT_DPLL_LOCKED)
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spdif_irq_dpll_lock(spdif_priv);
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if (sis & INT_TXFIFO_UNOV)
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dev_dbg(&pdev->dev, "isr: Tx FIFO under/overrun\n");
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if (sis & INT_TXFIFO_RESYNC)
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dev_dbg(&pdev->dev, "isr: Tx FIFO resync\n");
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if (sis & INT_CNEW)
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dev_dbg(&pdev->dev, "isr: cstatus new\n");
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if (sis & INT_VAL_NOGOOD)
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dev_dbg(&pdev->dev, "isr: validity flag no good\n");
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if (sis & INT_SYM_ERR)
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spdif_irq_sym_error(spdif_priv);
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if (sis & INT_BIT_ERR)
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dev_dbg(&pdev->dev, "isr: receiver found parity bit error\n");
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if (sis & INT_URX_FUL)
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spdif_irq_uqrx_full(spdif_priv, 'U');
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if (sis & INT_URX_OV)
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dev_dbg(&pdev->dev, "isr: U Channel receive register overrun\n");
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if (sis & INT_QRX_FUL)
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spdif_irq_uqrx_full(spdif_priv, 'Q');
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if (sis & INT_QRX_OV)
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dev_dbg(&pdev->dev, "isr: Q Channel receive register overrun\n");
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if (sis & INT_UQ_SYNC)
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spdif_irq_uq_sync(spdif_priv);
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if (sis & INT_UQ_ERR)
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spdif_irq_uq_err(spdif_priv);
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if (sis & INT_RXFIFO_UNOV)
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dev_dbg(&pdev->dev, "isr: Rx FIFO under/overrun\n");
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if (sis & INT_RXFIFO_RESYNC)
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dev_dbg(&pdev->dev, "isr: Rx FIFO resync\n");
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if (sis & INT_LOSS_LOCK)
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spdif_irq_dpll_lock(spdif_priv);
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/* FIXME: Write Tx FIFO to clear TxEm */
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if (sis & INT_TX_EM)
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dev_dbg(&pdev->dev, "isr: Tx FIFO empty\n");
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/* FIXME: Read Rx FIFO to clear RxFIFOFul */
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if (sis & INT_RXFIFO_FUL)
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dev_dbg(&pdev->dev, "isr: Rx FIFO full\n");
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return IRQ_HANDLED;
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}
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static int spdif_softreset(struct fsl_spdif_priv *spdif_priv)
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{
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struct regmap *regmap = spdif_priv->regmap;
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u32 val, cycle = 1000;
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regcache_cache_bypass(regmap, true);
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regmap_write(regmap, REG_SPDIF_SCR, SCR_SOFT_RESET);
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/*
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* RESET bit would be cleared after finishing its reset procedure,
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* which typically lasts 8 cycles. 1000 cycles will keep it safe.
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*/
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do {
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regmap_read(regmap, REG_SPDIF_SCR, &val);
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} while ((val & SCR_SOFT_RESET) && cycle--);
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regcache_cache_bypass(regmap, false);
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regcache_mark_dirty(regmap);
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regcache_sync(regmap);
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if (cycle)
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return 0;
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else
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return -EBUSY;
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}
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static void spdif_set_cstatus(struct spdif_mixer_control *ctrl,
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u8 mask, u8 cstatus)
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{
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ctrl->ch_status[3] &= ~mask;
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ctrl->ch_status[3] |= cstatus & mask;
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}
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static void spdif_write_channel_status(struct fsl_spdif_priv *spdif_priv)
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{
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struct spdif_mixer_control *ctrl = &spdif_priv->fsl_spdif_control;
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struct regmap *regmap = spdif_priv->regmap;
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struct platform_device *pdev = spdif_priv->pdev;
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u32 ch_status;
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ch_status = (bitrev8(ctrl->ch_status[0]) << 16) |
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(bitrev8(ctrl->ch_status[1]) << 8) |
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bitrev8(ctrl->ch_status[2]);
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regmap_write(regmap, REG_SPDIF_STCSCH, ch_status);
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dev_dbg(&pdev->dev, "STCSCH: 0x%06x\n", ch_status);
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ch_status = bitrev8(ctrl->ch_status[3]) << 16;
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regmap_write(regmap, REG_SPDIF_STCSCL, ch_status);
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dev_dbg(&pdev->dev, "STCSCL: 0x%06x\n", ch_status);
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}
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/* Set SPDIF PhaseConfig register for rx clock */
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static int spdif_set_rx_clksrc(struct fsl_spdif_priv *spdif_priv,
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enum spdif_gainsel gainsel, int dpll_locked)
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{
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struct regmap *regmap = spdif_priv->regmap;
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u8 clksrc = spdif_priv->rxclk_src;
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if (clksrc >= SRPC_CLKSRC_MAX || gainsel >= GAINSEL_MULTI_MAX)
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return -EINVAL;
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regmap_update_bits(regmap, REG_SPDIF_SRPC,
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SRPC_CLKSRC_SEL_MASK | SRPC_GAINSEL_MASK,
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SRPC_CLKSRC_SEL_SET(clksrc) | SRPC_GAINSEL_SET(gainsel));
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return 0;
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}
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static int spdif_set_sample_rate(struct snd_pcm_substream *substream,
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int sample_rate)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct fsl_spdif_priv *spdif_priv = snd_soc_dai_get_drvdata(asoc_rtd_to_cpu(rtd, 0));
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struct spdif_mixer_control *ctrl = &spdif_priv->fsl_spdif_control;
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struct regmap *regmap = spdif_priv->regmap;
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struct platform_device *pdev = spdif_priv->pdev;
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unsigned long csfs = 0;
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u32 stc, mask, rate;
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u16 sysclk_df;
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u8 clk, txclk_df;
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int ret;
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switch (sample_rate) {
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case 32000:
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rate = SPDIF_TXRATE_32000;
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csfs = IEC958_AES3_CON_FS_32000;
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break;
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case 44100:
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rate = SPDIF_TXRATE_44100;
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csfs = IEC958_AES3_CON_FS_44100;
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break;
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case 48000:
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rate = SPDIF_TXRATE_48000;
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csfs = IEC958_AES3_CON_FS_48000;
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break;
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case 96000:
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rate = SPDIF_TXRATE_96000;
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csfs = IEC958_AES3_CON_FS_96000;
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break;
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case 192000:
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rate = SPDIF_TXRATE_192000;
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csfs = IEC958_AES3_CON_FS_192000;
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break;
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default:
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dev_err(&pdev->dev, "unsupported sample rate %d\n", sample_rate);
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return -EINVAL;
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}
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clk = spdif_priv->txclk_src[rate];
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if (clk >= STC_TXCLK_SRC_MAX) {
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dev_err(&pdev->dev, "tx clock source is out of range\n");
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return -EINVAL;
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}
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txclk_df = spdif_priv->txclk_df[rate];
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if (txclk_df == 0) {
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dev_err(&pdev->dev, "the txclk_df can't be zero\n");
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return -EINVAL;
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}
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sysclk_df = spdif_priv->sysclk_df[rate];
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/* Don't mess up the clocks from other modules */
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if (clk != STC_TXCLK_SPDIF_ROOT)
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goto clk_set_bypass;
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/* The S/PDIF block needs a clock of 64 * fs * txclk_df */
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ret = clk_set_rate(spdif_priv->txclk[rate],
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64 * sample_rate * txclk_df);
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if (ret) {
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dev_err(&pdev->dev, "failed to set tx clock rate\n");
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return ret;
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}
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clk_set_bypass:
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dev_dbg(&pdev->dev, "expected clock rate = %d\n",
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(64 * sample_rate * txclk_df * sysclk_df));
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dev_dbg(&pdev->dev, "actual clock rate = %ld\n",
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clk_get_rate(spdif_priv->txclk[rate]));
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/* set fs field in consumer channel status */
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spdif_set_cstatus(ctrl, IEC958_AES3_CON_FS, csfs);
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/* select clock source and divisor */
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stc = STC_TXCLK_ALL_EN | STC_TXCLK_SRC_SET(clk) |
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STC_TXCLK_DF(txclk_df) | STC_SYSCLK_DF(sysclk_df);
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mask = STC_TXCLK_ALL_EN_MASK | STC_TXCLK_SRC_MASK |
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STC_TXCLK_DF_MASK | STC_SYSCLK_DF_MASK;
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regmap_update_bits(regmap, REG_SPDIF_STC, mask, stc);
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dev_dbg(&pdev->dev, "set sample rate to %dHz for %dHz playback\n",
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spdif_priv->txrate[rate], sample_rate);
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return 0;
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}
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static int fsl_spdif_startup(struct snd_pcm_substream *substream,
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struct snd_soc_dai *cpu_dai)
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{
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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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 i;
|
|
int ret;
|
|
|
|
/* Reset module and interrupts only for first initialization */
|
|
if (!cpu_dai->active) {
|
|
ret = clk_prepare_enable(spdif_priv->coreclk);
|
|
if (ret) {
|
|
dev_err(&pdev->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(&pdev->dev, "failed to enable spba clock\n");
|
|
goto err_spbaclk;
|
|
}
|
|
}
|
|
|
|
ret = spdif_softreset(spdif_priv);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "failed to soft reset\n");
|
|
goto err;
|
|
}
|
|
|
|
/* 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;
|
|
for (i = 0; i < SPDIF_TXRATE_MAX; i++) {
|
|
ret = clk_prepare_enable(spdif_priv->txclk[i]);
|
|
if (ret)
|
|
goto disable_txclk;
|
|
}
|
|
} 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;
|
|
ret = clk_prepare_enable(spdif_priv->rxclk);
|
|
if (ret)
|
|
goto err;
|
|
}
|
|
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;
|
|
|
|
disable_txclk:
|
|
for (i--; i >= 0; i--)
|
|
clk_disable_unprepare(spdif_priv->txclk[i]);
|
|
err:
|
|
if (!IS_ERR(spdif_priv->spbaclk))
|
|
clk_disable_unprepare(spdif_priv->spbaclk);
|
|
err_spbaclk:
|
|
clk_disable_unprepare(spdif_priv->coreclk);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void fsl_spdif_shutdown(struct snd_pcm_substream *substream,
|
|
struct snd_soc_dai *cpu_dai)
|
|
{
|
|
struct snd_soc_pcm_runtime *rtd = substream->private_data;
|
|
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, i;
|
|
|
|
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;
|
|
for (i = 0; i < SPDIF_TXRATE_MAX; i++)
|
|
clk_disable_unprepare(spdif_priv->txclk[i]);
|
|
} 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;
|
|
clk_disable_unprepare(spdif_priv->rxclk);
|
|
}
|
|
regmap_update_bits(regmap, REG_SPDIF_SCR, mask, scr);
|
|
|
|
/* Power down SPDIF module only if tx&rx are both inactive */
|
|
if (!cpu_dai->active) {
|
|
spdif_intr_status_clear(spdif_priv);
|
|
regmap_update_bits(regmap, REG_SPDIF_SCR,
|
|
SCR_LOW_POWER, SCR_LOW_POWER);
|
|
if (!IS_ERR(spdif_priv->spbaclk))
|
|
clk_disable_unprepare(spdif_priv->spbaclk);
|
|
clk_disable_unprepare(spdif_priv->coreclk);
|
|
}
|
|
}
|
|
|
|
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 = substream->private_data;
|
|
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_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 = substream->private_data;
|
|
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);
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static const struct snd_soc_dai_ops fsl_spdif_dai_ops = {
|
|
.startup = fsl_spdif_startup,
|
|
.hw_params = fsl_spdif_hw_params,
|
|
.trigger = fsl_spdif_trigger,
|
|
.shutdown = fsl_spdif_shutdown,
|
|
};
|
|
|
|
|
|
/*
|
|
* 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;
|
|
}
|
|
|
|
/* Valid bit information */
|
|
static int fsl_spdif_vbit_info(struct snd_kcontrol *kcontrol,
|
|
struct snd_ctl_elem_info *uinfo)
|
|
{
|
|
uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
|
|
uinfo->count = 1;
|
|
uinfo->value.integer.min = 0;
|
|
uinfo->value.integer.max = 1;
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Get valid good bit from interrupt status register */
|
|
static int fsl_spdif_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;
|
|
}
|
|
|
|
/* 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 = 96000;
|
|
|
|
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 info */
|
|
static int fsl_spdif_usync_info(struct snd_kcontrol *kcontrol,
|
|
struct snd_ctl_elem_info *uinfo)
|
|
{
|
|
uinfo->type = SNDRV_CTL_ELEM_TYPE_BOOLEAN;
|
|
uinfo->count = 1;
|
|
uinfo->value.integer.min = 0;
|
|
uinfo->value.integer.max = 1;
|
|
|
|
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 V-Bit Errors",
|
|
.access = SNDRV_CTL_ELEM_ACCESS_READ |
|
|
SNDRV_CTL_ELEM_ACCESS_VOLATILE,
|
|
.info = fsl_spdif_vbit_info,
|
|
.get = fsl_spdif_vbit_get,
|
|
},
|
|
/* DPLL lock info get controller */
|
|
{
|
|
.iface = SNDRV_CTL_ELEM_IFACE_PCM,
|
|
.name = "RX Sample Rate",
|
|
.access = SNDRV_CTL_ELEM_ACCESS_READ |
|
|
SNDRV_CTL_ELEM_ACCESS_VOLATILE,
|
|
.info = fsl_spdif_rxrate_info,
|
|
.get = fsl_spdif_rxrate_get,
|
|
},
|
|
/* 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 = fsl_spdif_usync_info,
|
|
.get = fsl_spdif_usync_get,
|
|
.put = fsl_spdif_usync_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));
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct snd_soc_dai_driver fsl_spdif_dai = {
|
|
.probe = &fsl_spdif_dai_probe,
|
|
.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",
|
|
};
|
|
|
|
/* 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_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_SRFM:
|
|
case REG_SPDIF_STC:
|
|
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:
|
|
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_STC:
|
|
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_STC,
|
|
.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[] = { 32000, 44100, 48000, 96000, 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[] = { 32000, 44100, 48000, 96000, 192000 };
|
|
struct platform_device *pdev = spdif_priv->pdev;
|
|
struct device *dev = &pdev->dev;
|
|
u64 savesub = 100000, ret;
|
|
struct clk *clk;
|
|
char tmp[16];
|
|
int i;
|
|
|
|
for (i = 0; i < STC_TXCLK_SRC_MAX; i++) {
|
|
sprintf(tmp, "rxtx%d", i);
|
|
clk = devm_clk_get(&pdev->dev, tmp);
|
|
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,
|
|
i == STC_TXCLK_SPDIF_ROOT);
|
|
if (savesub == ret)
|
|
continue;
|
|
|
|
savesub = ret;
|
|
spdif_priv->txclk[index] = clk;
|
|
spdif_priv->txclk_src[index] = i;
|
|
|
|
/* To quick catch a divisor, we allow a 0.1% deviation */
|
|
if (savesub < 100)
|
|
break;
|
|
}
|
|
|
|
dev_dbg(&pdev->dev, "use rxtx%d as tx clock source for %dHz sample rate\n",
|
|
spdif_priv->txclk_src[index], rate[index]);
|
|
dev_dbg(&pdev->dev, "use txclk df %d for %dHz sample rate\n",
|
|
spdif_priv->txclk_df[index], rate[index]);
|
|
if (clk_is_match(spdif_priv->txclk[index], spdif_priv->sysclk))
|
|
dev_dbg(&pdev->dev, "use sysclk df %d for %dHz sample rate\n",
|
|
spdif_priv->sysclk_df[index], rate[index]);
|
|
dev_dbg(&pdev->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 device_node *np = pdev->dev.of_node;
|
|
struct fsl_spdif_priv *spdif_priv;
|
|
struct spdif_mixer_control *ctrl;
|
|
struct resource *res;
|
|
void __iomem *regs;
|
|
int irq, ret, i;
|
|
|
|
if (!np)
|
|
return -ENODEV;
|
|
|
|
spdif_priv = devm_kzalloc(&pdev->dev, sizeof(*spdif_priv), GFP_KERNEL);
|
|
if (!spdif_priv)
|
|
return -ENOMEM;
|
|
|
|
spdif_priv->pdev = pdev;
|
|
|
|
/* 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);
|
|
|
|
/* Get the addresses and IRQ */
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
regs = devm_ioremap_resource(&pdev->dev, res);
|
|
if (IS_ERR(regs))
|
|
return PTR_ERR(regs);
|
|
|
|
spdif_priv->regmap = devm_regmap_init_mmio_clk(&pdev->dev,
|
|
"core", 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);
|
|
}
|
|
|
|
irq = platform_get_irq(pdev, 0);
|
|
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;
|
|
}
|
|
|
|
/* Get system clock for rx clock rate calculation */
|
|
spdif_priv->sysclk = devm_clk_get(&pdev->dev, "rxtx5");
|
|
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 = devm_clk_get(&pdev->dev, "rxtx1");
|
|
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;
|
|
|
|
for (i = 0; i < SPDIF_TXRATE_MAX; i++) {
|
|
ret = fsl_spdif_probe_txclk(spdif_priv, i);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
/* 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 = FSL_SPDIF_TXFIFO_WML;
|
|
spdif_priv->dma_params_rx.maxburst = FSL_SPDIF_RXFIFO_WML;
|
|
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);
|
|
|
|
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);
|
|
return ret;
|
|
}
|
|
|
|
ret = imx_pcm_dma_init(pdev, IMX_SPDIF_DMABUF_SIZE);
|
|
if (ret && ret != -EPROBE_DEFER)
|
|
dev_err(&pdev->dev, "imx_pcm_dma_init failed: %d\n", ret);
|
|
|
|
return ret;
|
|
}
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
static int fsl_spdif_suspend(struct device *dev)
|
|
{
|
|
struct fsl_spdif_priv *spdif_priv = dev_get_drvdata(dev);
|
|
|
|
regmap_read(spdif_priv->regmap, REG_SPDIF_SRPC,
|
|
&spdif_priv->regcache_srpc);
|
|
|
|
regcache_cache_only(spdif_priv->regmap, true);
|
|
regcache_mark_dirty(spdif_priv->regmap);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int fsl_spdif_resume(struct device *dev)
|
|
{
|
|
struct fsl_spdif_priv *spdif_priv = dev_get_drvdata(dev);
|
|
|
|
regcache_cache_only(spdif_priv->regmap, false);
|
|
|
|
regmap_update_bits(spdif_priv->regmap, REG_SPDIF_SRPC,
|
|
SRPC_CLKSRC_SEL_MASK | SRPC_GAINSEL_MASK,
|
|
spdif_priv->regcache_srpc);
|
|
|
|
return regcache_sync(spdif_priv->regmap);
|
|
}
|
|
#endif /* CONFIG_PM_SLEEP */
|
|
|
|
static const struct dev_pm_ops fsl_spdif_pm = {
|
|
SET_SYSTEM_SLEEP_PM_OPS(fsl_spdif_suspend, fsl_spdif_resume)
|
|
};
|
|
|
|
static const struct of_device_id fsl_spdif_dt_ids[] = {
|
|
{ .compatible = "fsl,imx35-spdif", },
|
|
{ .compatible = "fsl,vf610-spdif", },
|
|
{}
|
|
};
|
|
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,
|
|
};
|
|
|
|
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");
|