// SPDX-License-Identifier: GPL-2.0+
//
// Freescale ALSA SoC Digital Audio Interface (SAI) driver.
//
// Copyright 2012-2015 Freescale Semiconductor, Inc.
#include <linux/clk.h>
#include <linux/delay.h>
#include <linux/dmaengine.h>
#include <linux/module.h>
#include <linux/of.h>
#include <linux/pinctrl/consumer.h>
#include <linux/pm_qos.h>
#include <linux/pm_runtime.h>
#include <linux/regmap.h>
#include <linux/slab.h>
#include <linux/time.h>
#include <sound/core.h>
#include <sound/dmaengine_pcm.h>
#include <sound/pcm_params.h>
#include <linux/mfd/syscon.h>
#include <linux/mfd/syscon/imx6q-iomuxc-gpr.h>
#include "fsl_sai.h"
#include "fsl_utils.h"
#include "imx-pcm.h"
#define FSL_SAI_FLAGS (FSL_SAI_CSR_SEIE |\
FSL_SAI_CSR_FEIE)
static const unsigned int fsl_sai_rates[] = {
8000 , 11025 , 12000 , 16000 , 22050 ,
24000 , 32000 , 44100 , 48000 , 64000 ,
88200 , 96000 , 176400 , 192000 , 352800 ,
384000 , 705600 , 768000 , 1411200 , 2822400 ,
};
static const struct snd_pcm_hw_constraint_list fsl_sai_rate_constraints = {
.count = ARRAY_SIZE(fsl_sai_rates),
.list = fsl_sai_rates,
};
/**
* fsl_sai_dir_is_synced - Check if stream is synced by the opposite stream
*
* SAI supports synchronous mode using bit / frame clocks of either Transmitter ' s
* or Receiver ' s for both streams . This function is used to check if clocks of
* the stream ' s are synced by the opposite stream .
*
* @ sai : SAI context
* @ dir : stream direction
*/
static inline bool fsl_sai_dir_is_synced(struct fsl_sai *sai, int dir)
{
int adir = (dir == TX) ? RX : TX;
/* current dir in async mode while opposite dir in sync mode */
return !sai->synchronous[dir] && sai->synchronous[adir];
}
static struct pinctrl_state *fsl_sai_get_pins_state(struct fsl_sai *sai, u32 bclk)
{
struct pinctrl_state *state = NULL;
if (sai->is_pdm_mode) {
/* DSD512@44.1kHz, DSD512@48kHz */
if (bclk >= 22579200 )
state = pinctrl_lookup_state(sai->pinctrl, "dsd512" );
/* Get default DSD state */
if (IS_ERR_OR_NULL(state))
state = pinctrl_lookup_state(sai->pinctrl, "dsd" );
} else {
/* 706k32b2c, 768k32b2c, etc */
if (bclk >= 45158400 )
state = pinctrl_lookup_state(sai->pinctrl, "pcm_b2m" );
}
/* Get default state */
if (IS_ERR_OR_NULL(state))
state = pinctrl_lookup_state(sai->pinctrl, "default" );
return state;
}
static irqreturn_t fsl_sai_isr(int irq, void *devid)
{
struct fsl_sai *sai = (struct fsl_sai *)devid;
unsigned int ofs = sai->soc_data->reg_offset;
struct device *dev = &sai->pdev->dev;
u32 flags, xcsr, mask;
irqreturn_t iret = IRQ_NONE;
/*
* Both IRQ status bits and IRQ mask bits are in the xCSR but
* different shifts . And we here create a mask only for those
* IRQs that we activated .
*/
mask = (FSL_SAI_FLAGS >> FSL_SAI_CSR_xIE_SHIFT) << FSL_SAI_CSR_xF_SHIFT;
/* Tx IRQ */
regmap_read(sai->regmap, FSL_SAI_TCSR(ofs), &xcsr);
flags = xcsr & mask;
if (flags)
iret = IRQ_HANDLED;
else
goto irq_rx;
if (flags & FSL_SAI_CSR_WSF)
dev_dbg(dev, "isr: Start of Tx word detected\n" );
if (flags & FSL_SAI_CSR_SEF)
dev_dbg(dev, "isr: Tx Frame sync error detected\n" );
if (flags & FSL_SAI_CSR_FEF)
dev_dbg(dev, "isr: Transmit underrun detected\n" );
if (flags & FSL_SAI_CSR_FWF)
dev_dbg(dev, "isr: Enabled transmit FIFO is empty\n" );
if (flags & FSL_SAI_CSR_FRF)
dev_dbg(dev, "isr: Transmit FIFO watermark has been reached\n" );
flags &= FSL_SAI_CSR_xF_W_MASK;
xcsr &= ~FSL_SAI_CSR_xF_MASK;
if (flags)
regmap_write(sai->regmap, FSL_SAI_TCSR(ofs), flags | xcsr);
irq_rx:
/* Rx IRQ */
regmap_read(sai->regmap, FSL_SAI_RCSR(ofs), &xcsr);
flags = xcsr & mask;
if (flags)
iret = IRQ_HANDLED;
else
goto out;
if (flags & FSL_SAI_CSR_WSF)
dev_dbg(dev, "isr: Start of Rx word detected\n" );
if (flags & FSL_SAI_CSR_SEF)
dev_dbg(dev, "isr: Rx Frame sync error detected\n" );
if (flags & FSL_SAI_CSR_FEF)
dev_dbg(dev, "isr: Receive overflow detected\n" );
if (flags & FSL_SAI_CSR_FWF)
dev_dbg(dev, "isr: Enabled receive FIFO is full\n" );
if (flags & FSL_SAI_CSR_FRF)
dev_dbg(dev, "isr: Receive FIFO watermark has been reached\n" );
flags &= FSL_SAI_CSR_xF_W_MASK;
xcsr &= ~FSL_SAI_CSR_xF_MASK;
if (flags)
regmap_write(sai->regmap, FSL_SAI_RCSR(ofs), flags | xcsr);
out:
return iret;
}
static int fsl_sai_set_dai_tdm_slot_tx(struct snd_soc_dai *cpu_dai, u32 tx_mask,
u32 rx_mask, int slots, int slot_width)
{
struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai);
bool tx = true ;
sai->slots[tx] = slots;
sai->slot_width[tx] = slot_width;
return 0 ;
}
static int fsl_sai_set_dai_tdm_slot_rx(struct snd_soc_dai *cpu_dai, u32 tx_mask,
u32 rx_mask, int slots, int slot_width)
{
struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai);
bool tx = false ;
sai->slots[tx] = slots;
sai->slot_width[tx] = slot_width;
return 0 ;
}
static int fsl_sai_set_dai_tdm_slot(struct snd_soc_dai *cpu_dai, u32 tx_mask,
u32 rx_mask, int slots, int slot_width)
{
int ret;
ret = fsl_sai_set_dai_tdm_slot_tx(cpu_dai, tx_mask, rx_mask, slots, slot_width);
if (ret)
return ret;
return fsl_sai_set_dai_tdm_slot_rx(cpu_dai, tx_mask, rx_mask, slots, slot_width);
}
static int fsl_sai_xlate_tdm_slot_mask(unsigned int slots,
unsigned int *tx_mask, unsigned int *rx_mask)
{
/* Leave it empty, don't change the value of tx_mask and rx_mask */
return 0 ;
}
static int fsl_sai_set_dai_bclk_ratio(struct snd_soc_dai *dai,
unsigned int ratio)
{
struct fsl_sai *sai = snd_soc_dai_get_drvdata(dai);
sai->bclk_ratio = ratio;
return 0 ;
}
static int fsl_sai_set_dai_sysclk_tr(struct snd_soc_dai *cpu_dai,
int clk_id, unsigned int freq, bool tx)
{
struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai);
unsigned int ofs = sai->soc_data->reg_offset;
u32 val_cr2 = 0 ;
switch (clk_id) {
case FSL_SAI_CLK_BUS:
val_cr2 |= FSL_SAI_CR2_MSEL_BUS;
break ;
case FSL_SAI_CLK_MAST1:
val_cr2 |= FSL_SAI_CR2_MSEL_MCLK1;
break ;
case FSL_SAI_CLK_MAST2:
val_cr2 |= FSL_SAI_CR2_MSEL_MCLK2;
break ;
case FSL_SAI_CLK_MAST3:
val_cr2 |= FSL_SAI_CR2_MSEL_MCLK3;
break ;
default :
return -EINVAL;
}
regmap_update_bits(sai->regmap, FSL_SAI_xCR2(tx, ofs),
FSL_SAI_CR2_MSEL_MASK, val_cr2);
return 0 ;
}
static int fsl_sai_set_mclk_rate(struct snd_soc_dai *dai, int clk_id, unsigned int freq)
{
struct fsl_sai *sai = snd_soc_dai_get_drvdata(dai);
int ret;
fsl_asoc_reparent_pll_clocks(dai->dev, sai->mclk_clk[clk_id],
sai->pll8k_clk, sai->pll11k_clk, freq);
ret = clk_set_rate(sai->mclk_clk[clk_id], freq);
if (ret < 0 )
dev_err(dai->dev, "failed to set clock rate (%u): %d\n" , freq, ret);
return ret;
}
static int fsl_sai_set_dai_sysclk(struct snd_soc_dai *cpu_dai,
int clk_id, unsigned int freq, int dir)
{
struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai);
int ret;
if (dir == SND_SOC_CLOCK_IN)
return 0 ;
if (clk_id < 0 || clk_id >= FSL_SAI_MCLK_MAX) {
dev_err(cpu_dai->dev, "Unknown clock id: %d\n" , clk_id);
return -EINVAL;
}
if (IS_ERR_OR_NULL(sai->mclk_clk[clk_id])) {
dev_err(cpu_dai->dev, "Unassigned clock: %d\n" , clk_id);
return -EINVAL;
}
if (sai->mclk_streams == 0 && freq > 0 ) {
ret = fsl_sai_set_mclk_rate(cpu_dai,
clk_id ? clk_id : FSL_SAI_CLK_MAST1,
freq);
if (ret < 0 )
return ret;
}
ret = fsl_sai_set_dai_sysclk_tr(cpu_dai, clk_id, freq, true );
if (ret) {
dev_err(cpu_dai->dev, "Cannot set tx sysclk: %d\n" , ret);
return ret;
}
ret = fsl_sai_set_dai_sysclk_tr(cpu_dai, clk_id, freq, false );
if (ret)
dev_err(cpu_dai->dev, "Cannot set rx sysclk: %d\n" , ret);
return ret;
}
static int fsl_sai_set_dai_fmt_tr(struct snd_soc_dai *cpu_dai,
unsigned int fmt, bool tx)
{
struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai);
unsigned int ofs = sai->soc_data->reg_offset;
u32 val_cr2 = 0 , val_cr4 = 0 ;
if (!sai->is_lsb_first)
val_cr4 |= FSL_SAI_CR4_MF;
sai->is_pdm_mode = false ;
sai->is_dsp_mode[tx] = false ;
/* DAI mode */
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
/*
* Frame low , 1 clk before data , one word length for frame sync ,
* frame sync starts one serial clock cycle earlier ,
* that is , together with the last bit of the previous
* data word .
*/
val_cr2 |= FSL_SAI_CR2_BCP;
val_cr4 |= FSL_SAI_CR4_FSE | FSL_SAI_CR4_FSP;
break ;
case SND_SOC_DAIFMT_LEFT_J:
/*
* Frame high , one word length for frame sync ,
* frame sync asserts with the first bit of the frame .
*/
val_cr2 |= FSL_SAI_CR2_BCP;
break ;
case SND_SOC_DAIFMT_DSP_A:
/*
* Frame high , 1 clk before data , one bit for frame sync ,
* frame sync starts one serial clock cycle earlier ,
* that is , together with the last bit of the previous
* data word .
*/
val_cr2 |= FSL_SAI_CR2_BCP;
val_cr4 |= FSL_SAI_CR4_FSE;
sai->is_dsp_mode[tx] = true ;
break ;
case SND_SOC_DAIFMT_DSP_B:
/*
* Frame high , one bit for frame sync ,
* frame sync asserts with the first bit of the frame .
*/
val_cr2 |= FSL_SAI_CR2_BCP;
sai->is_dsp_mode[tx] = true ;
break ;
case SND_SOC_DAIFMT_PDM:
val_cr2 |= FSL_SAI_CR2_BCP;
sai->is_pdm_mode = true ;
break ;
case SND_SOC_DAIFMT_RIGHT_J:
/* To be done */
default :
return -EINVAL;
}
/* DAI clock inversion */
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_IB_IF:
/* Invert both clocks */
val_cr2 ^= FSL_SAI_CR2_BCP;
val_cr4 ^= FSL_SAI_CR4_FSP;
break ;
case SND_SOC_DAIFMT_IB_NF:
/* Invert bit clock */
val_cr2 ^= FSL_SAI_CR2_BCP;
break ;
case SND_SOC_DAIFMT_NB_IF:
/* Invert frame clock */
val_cr4 ^= FSL_SAI_CR4_FSP;
break ;
case SND_SOC_DAIFMT_NB_NF:
/* Nothing to do for both normal cases */
break ;
default :
return -EINVAL;
}
/* DAI clock provider masks */
switch (fmt & SND_SOC_DAIFMT_CLOCK_PROVIDER_MASK) {
case SND_SOC_DAIFMT_BP_FP:
val_cr2 |= FSL_SAI_CR2_BCD_MSTR;
val_cr4 |= FSL_SAI_CR4_FSD_MSTR;
sai->is_consumer_mode[tx] = false ;
break ;
case SND_SOC_DAIFMT_BC_FC:
sai->is_consumer_mode[tx] = true ;
break ;
case SND_SOC_DAIFMT_BP_FC:
val_cr2 |= FSL_SAI_CR2_BCD_MSTR;
sai->is_consumer_mode[tx] = false ;
break ;
case SND_SOC_DAIFMT_BC_FP:
val_cr4 |= FSL_SAI_CR4_FSD_MSTR;
sai->is_consumer_mode[tx] = true ;
break ;
default :
return -EINVAL;
}
regmap_update_bits(sai->regmap, FSL_SAI_xCR2(tx, ofs),
FSL_SAI_CR2_BCP | FSL_SAI_CR2_BCD_MSTR, val_cr2);
regmap_update_bits(sai->regmap, FSL_SAI_xCR4(tx, ofs),
FSL_SAI_CR4_MF | FSL_SAI_CR4_FSE |
FSL_SAI_CR4_FSP | FSL_SAI_CR4_FSD_MSTR, val_cr4);
return 0 ;
}
static int fsl_sai_set_dai_fmt(struct snd_soc_dai *cpu_dai, unsigned int fmt)
{
int ret;
ret = fsl_sai_set_dai_fmt_tr(cpu_dai, fmt, true );
if (ret) {
dev_err(cpu_dai->dev, "Cannot set tx format: %d\n" , ret);
return ret;
}
ret = fsl_sai_set_dai_fmt_tr(cpu_dai, fmt, false );
if (ret)
dev_err(cpu_dai->dev, "Cannot set rx format: %d\n" , ret);
return ret;
}
static int fsl_sai_set_dai_fmt_tx(struct snd_soc_dai *cpu_dai, unsigned int fmt)
{
return fsl_sai_set_dai_fmt_tr(cpu_dai, fmt, true );
}
static int fsl_sai_set_dai_fmt_rx(struct snd_soc_dai *cpu_dai, unsigned int fmt)
{
return fsl_sai_set_dai_fmt_tr(cpu_dai, fmt, false );
}
static int fsl_sai_set_bclk(struct snd_soc_dai *dai, bool tx, u32 freq)
{
struct fsl_sai *sai = snd_soc_dai_get_drvdata(dai);
unsigned int reg, ofs = sai->soc_data->reg_offset;
unsigned long clk_rate;
u32 savediv = 0 , ratio, bestdiff = freq;
int adir = tx ? RX : TX;
int dir = tx ? TX : RX;
u32 id;
bool support_1_1_ratio = sai->verid.version >= 0 x0301;
/* Don't apply to consumer mode */
if (sai->is_consumer_mode[tx])
return 0 ;
/*
* There is no point in polling MCLK0 if it is identical to MCLK1 .
* And given that MQS use case has to use MCLK1 though two clocks
* are the same , we simply skip MCLK0 and start to find from MCLK1 .
*/
id = sai->soc_data->mclk0_is_mclk1 ? 1 : 0 ;
for (; id < FSL_SAI_MCLK_MAX; id++) {
int diff;
clk_rate = clk_get_rate(sai->mclk_clk[id]);
if (!clk_rate)
continue ;
ratio = DIV_ROUND_CLOSEST(clk_rate, freq);
if (!ratio || ratio > 512 )
continue ;
if (ratio == 1 && !support_1_1_ratio)
continue ;
if ((ratio & 1 ) && ratio > 1 )
continue ;
diff = abs((long )clk_rate - ratio * freq);
/*
* Drop the source that can not be
* divided into the required rate .
*/
if (diff != 0 && clk_rate / diff < 1000 )
continue ;
dev_dbg(dai->dev,
"ratio %d for freq %dHz based on clock %ldHz\n" ,
ratio, freq, clk_rate);
if (diff < bestdiff) {
savediv = ratio;
sai->mclk_id[tx] = id;
bestdiff = diff;
}
if (diff == 0 )
break ;
}
if (savediv == 0 ) {
dev_err(dai->dev, "failed to derive required %cx rate: %d\n" ,
tx ? 'T' : 'R' , freq);
return -EINVAL;
}
dev_dbg(dai->dev, "best fit: clock id=%d, div=%d, deviation =%d\n" ,
sai->mclk_id[tx], savediv, bestdiff);
/*
* 1 ) For Asynchronous mode , we must set RCR2 register for capture , and
* set TCR2 register for playback .
* 2 ) For Tx sync with Rx clock , we must set RCR2 register for playback
* and capture .
* 3 ) For Rx sync with Tx clock , we must set TCR2 register for playback
* and capture .
* 4 ) For Tx and Rx are both Synchronous with another SAI , we just
* ignore it .
*/
if (fsl_sai_dir_is_synced(sai, adir))
reg = FSL_SAI_xCR2(!tx, ofs);
else if (!sai->synchronous[dir])
reg = FSL_SAI_xCR2(tx, ofs);
else
return 0 ;
regmap_update_bits(sai->regmap, reg, FSL_SAI_CR2_MSEL_MASK,
FSL_SAI_CR2_MSEL(sai->mclk_id[tx]));
if (savediv == 1 ) {
regmap_update_bits(sai->regmap, reg,
FSL_SAI_CR2_DIV_MASK | FSL_SAI_CR2_BYP,
FSL_SAI_CR2_BYP);
if (fsl_sai_dir_is_synced(sai, adir))
regmap_update_bits(sai->regmap, FSL_SAI_xCR2(tx, ofs),
FSL_SAI_CR2_BCI, FSL_SAI_CR2_BCI);
else
regmap_update_bits(sai->regmap, FSL_SAI_xCR2(tx, ofs),
FSL_SAI_CR2_BCI, 0 );
} else {
regmap_update_bits(sai->regmap, reg,
FSL_SAI_CR2_DIV_MASK | FSL_SAI_CR2_BYP,
savediv / 2 - 1 );
}
return 0 ;
}
static int fsl_sai_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *cpu_dai)
{
struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai);
unsigned int ofs = sai->soc_data->reg_offset;
bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
unsigned int channels = params_channels(params);
struct snd_dmaengine_dai_dma_data *dma_params;
struct fsl_sai_dl_cfg *dl_cfg = sai->dl_cfg;
u32 word_width = params_width(params);
int trce_mask = 0 , dl_cfg_idx = 0 ;
int dl_cfg_cnt = sai->dl_cfg_cnt;
u32 dl_type = FSL_SAI_DL_I2S;
u32 val_cr4 = 0 , val_cr5 = 0 ;
u32 slots = (channels == 1 ) ? 2 : channels;
u32 slot_width = word_width;
int adir = tx ? RX : TX;
u32 pins, bclk;
u32 watermark;
int ret, i;
if (sai->slot_width[tx])
slot_width = sai->slot_width[tx];
if (sai->slots[tx])
slots = sai->slots[tx];
else if (sai->bclk_ratio)
slots = sai->bclk_ratio / slot_width;
pins = DIV_ROUND_UP(channels, slots);
/*
* PDM mode , channels are independent
* each channels are on one dataline / FIFO .
*/
if (sai->is_pdm_mode) {
pins = channels;
dl_type = FSL_SAI_DL_PDM;
}
for (i = 0 ; i < dl_cfg_cnt; i++) {
if (dl_cfg[i].type == dl_type && dl_cfg[i].pins[tx] == pins) {
dl_cfg_idx = i;
break ;
}
}
if (hweight8(dl_cfg[dl_cfg_idx].mask[tx]) < pins) {
dev_err(cpu_dai->dev, "channel not supported\n" );
return -EINVAL;
}
bclk = params_rate(params) * (sai->bclk_ratio ? sai->bclk_ratio : slots * slot_width);
if (!IS_ERR_OR_NULL(sai->pinctrl)) {
sai->pins_state = fsl_sai_get_pins_state(sai, bclk);
if (!IS_ERR_OR_NULL(sai->pins_state)) {
ret = pinctrl_select_state(sai->pinctrl, sai->pins_state);
if (ret) {
dev_err(cpu_dai->dev, "failed to set proper pins state: %d\n" , ret);
return ret;
}
}
}
if (!sai->is_consumer_mode[tx]) {
ret = fsl_sai_set_bclk(cpu_dai, tx, bclk);
if (ret)
return ret;
/* Do not enable the clock if it is already enabled */
if (!(sai->mclk_streams & BIT(substream->stream))) {
ret = clk_prepare_enable(sai->mclk_clk[sai->mclk_id[tx]]);
if (ret)
return ret;
sai->mclk_streams |= BIT(substream->stream);
}
}
if (!sai->is_dsp_mode[tx] && !sai->is_pdm_mode)
val_cr4 |= FSL_SAI_CR4_SYWD(slot_width);
val_cr5 |= FSL_SAI_CR5_WNW(slot_width);
val_cr5 |= FSL_SAI_CR5_W0W(slot_width);
if (sai->is_lsb_first)
val_cr5 |= FSL_SAI_CR5_FBT(0 );
else
val_cr5 |= FSL_SAI_CR5_FBT(word_width - 1 );
val_cr4 |= FSL_SAI_CR4_FRSZ(slots);
/* Set to avoid channel swap */
val_cr4 |= FSL_SAI_CR4_FCONT;
/* Set to output mode to avoid tri-stated data pins */
if (tx)
val_cr4 |= FSL_SAI_CR4_CHMOD;
/*
* When Tx ( Rx ) sync with Rx ( Tx ) clock , Rx ( Tx ) will provide bclk and
* frame clock for Tx ( Rx ) . We should set RCR4 ( TCR4 ) , RCR5 ( TCR5 )
* for playback ( capture ) , or there will be sync error .
*/
if (fsl_sai_dir_is_synced(sai, adir)) {
regmap_update_bits(sai->regmap, FSL_SAI_xCR4(!tx, ofs),
FSL_SAI_CR4_SYWD_MASK | FSL_SAI_CR4_FRSZ_MASK |
FSL_SAI_CR4_CHMOD_MASK,
val_cr4);
regmap_update_bits(sai->regmap, FSL_SAI_xCR5(!tx, ofs),
FSL_SAI_CR5_WNW_MASK | FSL_SAI_CR5_W0W_MASK |
FSL_SAI_CR5_FBT_MASK, val_cr5);
}
/*
* Combine mode has limation :
* - Can ' t used for singel dataline / FIFO case except the FIFO0
* - Can ' t used for multi dataline / FIFO case except the enabled FIFOs
* are successive and start from FIFO0
*
* So for common usage , all multi fifo case disable the combine mode .
*/
if (hweight8(dl_cfg[dl_cfg_idx].mask[tx]) <= 1 || sai->is_multi_fifo_dma)
regmap_update_bits(sai->regmap, FSL_SAI_xCR4(tx, ofs),
FSL_SAI_CR4_FCOMB_MASK, 0 );
else
regmap_update_bits(sai->regmap, FSL_SAI_xCR4(tx, ofs),
FSL_SAI_CR4_FCOMB_MASK, FSL_SAI_CR4_FCOMB_SOFT);
dma_params = tx ? &sai->dma_params_tx : &sai->dma_params_rx;
dma_params->addr = sai->res->start + FSL_SAI_xDR0(tx) +
dl_cfg[dl_cfg_idx].start_off[tx] * 0 x4;
if (sai->is_multi_fifo_dma) {
sai->audio_config[tx].words_per_fifo = min(slots, channels);
if (tx) {
sai->audio_config[tx].n_fifos_dst = pins;
sai->audio_config[tx].stride_fifos_dst = dl_cfg[dl_cfg_idx].next_off[tx];
} else {
sai->audio_config[tx].n_fifos_src = pins;
sai->audio_config[tx].stride_fifos_src = dl_cfg[dl_cfg_idx].next_off[tx];
}
dma_params->maxburst = sai->audio_config[tx].words_per_fifo * pins;
dma_params->peripheral_config = &sai->audio_config[tx];
dma_params->peripheral_size = sizeof (sai->audio_config[tx]);
watermark = tx ? (sai->soc_data->fifo_depth - dma_params->maxburst) :
(dma_params->maxburst - 1 );
regmap_update_bits(sai->regmap, FSL_SAI_xCR1(tx, ofs),
FSL_SAI_CR1_RFW_MASK(sai->soc_data->fifo_depth),
watermark);
}
/* Find a proper tcre setting */
for (i = 0 ; i < sai->soc_data->pins; i++) {
trce_mask = (1 << (i + 1 )) - 1 ;
if (hweight8(dl_cfg[dl_cfg_idx].mask[tx] & trce_mask) == pins)
break ;
}
regmap_update_bits(sai->regmap, FSL_SAI_xCR3(tx, ofs),
FSL_SAI_CR3_TRCE_MASK,
FSL_SAI_CR3_TRCE((dl_cfg[dl_cfg_idx].mask[tx] & trce_mask)));
/*
* When the TERE and FSD_MSTR enabled before configuring the word width
* There will be no frame sync clock issue , because word width impact
* the generation of frame sync clock .
*
* TERE enabled earlier only for i . MX8MP case for the hardware limitation ,
* We need to disable FSD_MSTR before configuring word width , then enable
* FSD_MSTR bit for this specific case .
*/
if (sai->soc_data->mclk_with_tere && sai->mclk_direction_output &&
!sai->is_consumer_mode[tx])
regmap_update_bits(sai->regmap, FSL_SAI_xCR4(tx, ofs),
FSL_SAI_CR4_FSD_MSTR, 0 );
regmap_update_bits(sai->regmap, FSL_SAI_xCR4(tx, ofs),
FSL_SAI_CR4_SYWD_MASK | FSL_SAI_CR4_FRSZ_MASK |
FSL_SAI_CR4_CHMOD_MASK | FSL_SAI_CR4_FCONT_MASK,
val_cr4);
regmap_update_bits(sai->regmap, FSL_SAI_xCR5(tx, ofs),
FSL_SAI_CR5_WNW_MASK | FSL_SAI_CR5_W0W_MASK |
FSL_SAI_CR5_FBT_MASK, val_cr5);
/* Enable FSD_MSTR after configuring word width */
if (sai->soc_data->mclk_with_tere && sai->mclk_direction_output &&
!sai->is_consumer_mode[tx])
regmap_update_bits(sai->regmap, FSL_SAI_xCR4(tx, ofs),
FSL_SAI_CR4_FSD_MSTR, FSL_SAI_CR4_FSD_MSTR);
regmap_write(sai->regmap, FSL_SAI_xMR(tx),
~0 UL - ((1 << min(channels, slots)) - 1 ));
return 0 ;
}
static int fsl_sai_hw_free(struct snd_pcm_substream *substream,
struct snd_soc_dai *cpu_dai)
{
struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai);
bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
unsigned int ofs = sai->soc_data->reg_offset;
/* Clear xMR to avoid channel swap with mclk_with_tere enabled case */
regmap_write(sai->regmap, FSL_SAI_xMR(tx), 0 );
regmap_update_bits(sai->regmap, FSL_SAI_xCR3(tx, ofs),
FSL_SAI_CR3_TRCE_MASK, 0 );
if (!sai->is_consumer_mode[tx] &&
sai->mclk_streams & BIT(substream->stream)) {
clk_disable_unprepare(sai->mclk_clk[sai->mclk_id[tx]]);
sai->mclk_streams &= ~BIT(substream->stream);
}
return 0 ;
}
static void fsl_sai_config_disable(struct fsl_sai *sai, int dir)
{
unsigned int ofs = sai->soc_data->reg_offset;
bool tx = dir == TX;
u32 xcsr, count = 100 , mask;
if (sai->soc_data->mclk_with_tere && sai->mclk_direction_output)
mask = FSL_SAI_CSR_TERE;
else
mask = FSL_SAI_CSR_TERE | FSL_SAI_CSR_BCE;
regmap_update_bits(sai->regmap, FSL_SAI_xCSR(tx, ofs),
mask, 0 );
/* TERE will remain set till the end of current frame */
do {
udelay(10 );
regmap_read(sai->regmap, FSL_SAI_xCSR(tx, ofs), &xcsr);
} while (--count && xcsr & FSL_SAI_CSR_TERE);
regmap_update_bits(sai->regmap, FSL_SAI_xCSR(tx, ofs),
FSL_SAI_CSR_FR, FSL_SAI_CSR_FR);
/*
* For sai master mode , after several open / close sai ,
* there will be no frame clock , and can ' t recover
* anymore . Add software reset to fix this issue .
* This is a hardware bug , and will be fix in the
* next sai version .
*
* In consumer mode , this can happen even after a
* single open / close , especially if both tx and rx
* are running concurrently .
*/
/* Software Reset */
regmap_update_bits(sai->regmap, FSL_SAI_xCSR(tx, ofs), FSL_SAI_CSR_SR, FSL_SAI_CSR_SR);
/* Clear SR bit to finish the reset */
regmap_update_bits(sai->regmap, FSL_SAI_xCSR(tx, ofs), FSL_SAI_CSR_SR, 0 );
}
static int fsl_sai_trigger(struct snd_pcm_substream *substream, int cmd,
struct snd_soc_dai *cpu_dai)
{
struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai);
unsigned int ofs = sai->soc_data->reg_offset;
bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
int adir = tx ? RX : TX;
int dir = tx ? TX : RX;
u32 xcsr;
/*
* Asynchronous mode : Clear SYNC for both Tx and Rx .
* Rx sync with Tx clocks : Clear SYNC for Tx , set it for Rx .
* Tx sync with Rx clocks : Clear SYNC for Rx , set it for Tx .
*/
regmap_update_bits(sai->regmap, FSL_SAI_TCR2(ofs), FSL_SAI_CR2_SYNC,
sai->synchronous[TX] ? FSL_SAI_CR2_SYNC : 0 );
regmap_update_bits(sai->regmap, FSL_SAI_RCR2(ofs), FSL_SAI_CR2_SYNC,
sai->synchronous[RX] ? FSL_SAI_CR2_SYNC : 0 );
/*
* It is recommended that the transmitter is the last enabled
* and the first disabled .
*/
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
regmap_update_bits(sai->regmap, FSL_SAI_xCSR(tx, ofs),
FSL_SAI_CSR_FRDE, FSL_SAI_CSR_FRDE);
regmap_update_bits(sai->regmap, FSL_SAI_xCSR(tx, ofs),
FSL_SAI_CSR_TERE, FSL_SAI_CSR_TERE);
/*
* Enable the opposite direction for synchronous mode
* 1 . Tx sync with Rx : only set RE for Rx ; set TE & RE for Tx
* 2 . Rx sync with Tx : only set TE for Tx ; set RE & TE for Rx
*
* RM recommends to enable RE after TE for case 1 and to enable
* TE after RE for case 2 , but we here may not always guarantee
* that happens : " arecord 1 . wav ; aplay 2 . wav " in case 1 enables
* TE after RE , which is against what RM recommends but should
* be safe to do , judging by years of testing results .
*/
if (fsl_sai_dir_is_synced(sai, adir))
regmap_update_bits(sai->regmap, FSL_SAI_xCSR((!tx), ofs),
FSL_SAI_CSR_TERE, FSL_SAI_CSR_TERE);
regmap_update_bits(sai->regmap, FSL_SAI_xCSR(tx, ofs),
FSL_SAI_CSR_xIE_MASK, FSL_SAI_FLAGS);
break ;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
regmap_update_bits(sai->regmap, FSL_SAI_xCSR(tx, ofs),
FSL_SAI_CSR_FRDE, 0 );
regmap_update_bits(sai->regmap, FSL_SAI_xCSR(tx, ofs),
FSL_SAI_CSR_xIE_MASK, 0 );
/* Check if the opposite FRDE is also disabled */
regmap_read(sai->regmap, FSL_SAI_xCSR(!tx, ofs), &xcsr);
/*
* If opposite stream provides clocks for synchronous mode and
* it is inactive , disable it before disabling the current one
*/
if (fsl_sai_dir_is_synced(sai, adir) && !(xcsr & FSL_SAI_CSR_FRDE))
fsl_sai_config_disable(sai, adir);
/*
* Disable current stream if either of :
* 1 . current stream doesn ' t provide clocks for synchronous mode
* 2 . current stream provides clocks for synchronous mode but no
* more stream is active .
*/
if (!fsl_sai_dir_is_synced(sai, dir) || !(xcsr & FSL_SAI_CSR_FRDE))
fsl_sai_config_disable(sai, dir);
break ;
default :
return -EINVAL;
}
return 0 ;
}
static int fsl_sai_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *cpu_dai)
{
struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai);
bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
int ret;
/*
* EDMA controller needs period size to be a multiple of
* tx / rx maxburst
*/
if (sai->soc_data->use_edma)
snd_pcm_hw_constraint_step(substream->runtime, 0 ,
SNDRV_PCM_HW_PARAM_PERIOD_SIZE,
tx ? sai->dma_params_tx.maxburst :
sai->dma_params_rx.maxburst);
ret = snd_pcm_hw_constraint_list(substream->runtime, 0 ,
SNDRV_PCM_HW_PARAM_RATE, &sai->constraint_rates);
return ret;
}
static int fsl_sai_dai_probe(struct snd_soc_dai *cpu_dai)
{
struct fsl_sai *sai = dev_get_drvdata(cpu_dai->dev);
unsigned int ofs = sai->soc_data->reg_offset;
/* Software Reset for both Tx and Rx */
regmap_update_bits(sai->regmap, FSL_SAI_TCSR(ofs), FSL_SAI_CSR_SR, FSL_SAI_CSR_SR);
regmap_update_bits(sai->regmap, FSL_SAI_RCSR(ofs), FSL_SAI_CSR_SR, FSL_SAI_CSR_SR);
/* Clear SR bit to finish the reset */
regmap_update_bits(sai->regmap, FSL_SAI_TCSR(ofs), FSL_SAI_CSR_SR, 0 );
regmap_update_bits(sai->regmap, FSL_SAI_RCSR(ofs), FSL_SAI_CSR_SR, 0 );
regmap_update_bits(sai->regmap, FSL_SAI_TCR1(ofs),
FSL_SAI_CR1_RFW_MASK(sai->soc_data->fifo_depth),
sai->soc_data->fifo_depth - sai->dma_params_tx.maxburst);
regmap_update_bits(sai->regmap, FSL_SAI_RCR1(ofs),
FSL_SAI_CR1_RFW_MASK(sai->soc_data->fifo_depth),
sai->dma_params_rx.maxburst - 1 );
snd_soc_dai_init_dma_data(cpu_dai, &sai->dma_params_tx,
&sai->dma_params_rx);
return 0 ;
}
static const struct snd_soc_dai_ops fsl_sai_pcm_dai_ops = {
.probe = fsl_sai_dai_probe,
.set_bclk_ratio = fsl_sai_set_dai_bclk_ratio,
.set_sysclk = fsl_sai_set_dai_sysclk,
.set_fmt = fsl_sai_set_dai_fmt,
.set_tdm_slot = fsl_sai_set_dai_tdm_slot,
.hw_params = fsl_sai_hw_params,
.hw_free = fsl_sai_hw_free,
.trigger = fsl_sai_trigger,
.startup = fsl_sai_startup,
};
static const struct snd_soc_dai_ops fsl_sai_pcm_dai_tx_ops = {
.probe = fsl_sai_dai_probe,
.set_bclk_ratio = fsl_sai_set_dai_bclk_ratio,
.set_sysclk = fsl_sai_set_dai_sysclk,
.set_fmt = fsl_sai_set_dai_fmt_tx,
.set_tdm_slot = fsl_sai_set_dai_tdm_slot_tx,
.xlate_tdm_slot_mask = fsl_sai_xlate_tdm_slot_mask,
.hw_params = fsl_sai_hw_params,
.hw_free = fsl_sai_hw_free,
.trigger = fsl_sai_trigger,
.startup = fsl_sai_startup,
};
static const struct snd_soc_dai_ops fsl_sai_pcm_dai_rx_ops = {
.probe = fsl_sai_dai_probe,
.set_bclk_ratio = fsl_sai_set_dai_bclk_ratio,
.set_sysclk = fsl_sai_set_dai_sysclk,
.set_fmt = fsl_sai_set_dai_fmt_rx,
.set_tdm_slot = fsl_sai_set_dai_tdm_slot_rx,
.xlate_tdm_slot_mask = fsl_sai_xlate_tdm_slot_mask,
.hw_params = fsl_sai_hw_params,
.hw_free = fsl_sai_hw_free,
.trigger = fsl_sai_trigger,
.startup = fsl_sai_startup,
};
static int fsl_sai_dai_resume(struct snd_soc_component *component)
{
struct fsl_sai *sai = snd_soc_component_get_drvdata(component);
struct device *dev = &sai->pdev->dev;
int ret;
if (!IS_ERR_OR_NULL(sai->pinctrl) && !IS_ERR_OR_NULL(sai->pins_state)) {
ret = pinctrl_select_state(sai->pinctrl, sai->pins_state);
if (ret) {
dev_err(dev, "failed to set proper pins state: %d\n" , ret);
return ret;
}
}
return 0 ;
}
static struct snd_soc_dai_driver fsl_sai_dai_template[] = {
{
.name = "sai-tx-rx" ,
.playback = {
.stream_name = "CPU-Playback" ,
.channels_min = 1 ,
.channels_max = 32 ,
.rate_min = 8000 ,
.rate_max = 2822400 ,
.rates = SNDRV_PCM_RATE_KNOT,
.formats = FSL_SAI_FORMATS,
},
.capture = {
.stream_name = "CPU-Capture" ,
.channels_min = 1 ,
.channels_max = 32 ,
.rate_min = 8000 ,
.rate_max = 2822400 ,
.rates = SNDRV_PCM_RATE_KNOT,
.formats = FSL_SAI_FORMATS,
},
.ops = &fsl_sai_pcm_dai_ops,
},
{
.name = "sai-tx" ,
.playback = {
.stream_name = "SAI-Playback" ,
.channels_min = 1 ,
.channels_max = 32 ,
.rate_min = 8000 ,
.rate_max = 2822400 ,
.rates = SNDRV_PCM_RATE_KNOT,
.formats = FSL_SAI_FORMATS,
},
.ops = &fsl_sai_pcm_dai_tx_ops,
},
{
.name = "sai-rx" ,
.capture = {
.stream_name = "SAI-Capture" ,
.channels_min = 1 ,
.channels_max = 32 ,
.rate_min = 8000 ,
.rate_max = 2822400 ,
.rates = SNDRV_PCM_RATE_KNOT,
.formats = FSL_SAI_FORMATS,
},
.ops = &fsl_sai_pcm_dai_rx_ops,
},
};
static const struct snd_soc_component_driver fsl_component = {
.name = "fsl-sai" ,
.resume = fsl_sai_dai_resume,
.legacy_dai_naming = 1 ,
};
static const struct reg_default fsl_sai_reg_defaults_ofs0[] = {
{FSL_SAI_TCR1(0 ), 0 },
{FSL_SAI_TCR2(0 ), 0 },
{FSL_SAI_TCR3(0 ), 0 },
{FSL_SAI_TCR4(0 ), 0 },
{FSL_SAI_TCR5(0 ), 0 },
{FSL_SAI_TDR0, 0 },
{FSL_SAI_TDR1, 0 },
{FSL_SAI_TDR2, 0 },
{FSL_SAI_TDR3, 0 },
{FSL_SAI_TDR4, 0 },
{FSL_SAI_TDR5, 0 },
{FSL_SAI_TDR6, 0 },
{FSL_SAI_TDR7, 0 },
{FSL_SAI_TMR, 0 },
{FSL_SAI_RCR1(0 ), 0 },
{FSL_SAI_RCR2(0 ), 0 },
{FSL_SAI_RCR3(0 ), 0 },
{FSL_SAI_RCR4(0 ), 0 },
{FSL_SAI_RCR5(0 ), 0 },
{FSL_SAI_RMR, 0 },
};
static const struct reg_default fsl_sai_reg_defaults_ofs8[] = {
{FSL_SAI_TCR1(8 ), 0 },
{FSL_SAI_TCR2(8 ), 0 },
{FSL_SAI_TCR3(8 ), 0 },
{FSL_SAI_TCR4(8 ), 0 },
{FSL_SAI_TCR5(8 ), 0 },
{FSL_SAI_TDR0, 0 },
{FSL_SAI_TDR1, 0 },
{FSL_SAI_TDR2, 0 },
{FSL_SAI_TDR3, 0 },
{FSL_SAI_TDR4, 0 },
{FSL_SAI_TDR5, 0 },
{FSL_SAI_TDR6, 0 },
{FSL_SAI_TDR7, 0 },
{FSL_SAI_TMR, 0 },
{FSL_SAI_RCR1(8 ), 0 },
{FSL_SAI_RCR2(8 ), 0 },
{FSL_SAI_RCR3(8 ), 0 },
{FSL_SAI_RCR4(8 ), 0 },
{FSL_SAI_RCR5(8 ), 0 },
{FSL_SAI_RMR, 0 },
{FSL_SAI_MCTL, 0 },
{FSL_SAI_MDIV, 0 },
};
static bool fsl_sai_readable_reg(struct device *dev, unsigned int reg)
{
struct fsl_sai *sai = dev_get_drvdata(dev);
unsigned int ofs = sai->soc_data->reg_offset;
if (reg >= FSL_SAI_TCSR(ofs) && reg <= FSL_SAI_TCR5(ofs))
return true ;
if (reg >= FSL_SAI_RCSR(ofs) && reg <= FSL_SAI_RCR5(ofs))
return true ;
switch (reg) {
case FSL_SAI_TFR0:
case FSL_SAI_TFR1:
case FSL_SAI_TFR2:
case FSL_SAI_TFR3:
case FSL_SAI_TFR4:
case FSL_SAI_TFR5:
case FSL_SAI_TFR6:
case FSL_SAI_TFR7:
case FSL_SAI_TMR:
case FSL_SAI_RDR0:
case FSL_SAI_RDR1:
case FSL_SAI_RDR2:
case FSL_SAI_RDR3:
case FSL_SAI_RDR4:
case FSL_SAI_RDR5:
case FSL_SAI_RDR6:
case FSL_SAI_RDR7:
case FSL_SAI_RFR0:
case FSL_SAI_RFR1:
case FSL_SAI_RFR2:
case FSL_SAI_RFR3:
case FSL_SAI_RFR4:
case FSL_SAI_RFR5:
case FSL_SAI_RFR6:
case FSL_SAI_RFR7:
case FSL_SAI_RMR:
case FSL_SAI_MCTL:
case FSL_SAI_MDIV:
case FSL_SAI_VERID:
case FSL_SAI_PARAM:
case FSL_SAI_TTCTN:
case FSL_SAI_RTCTN:
case FSL_SAI_TTCTL:
case FSL_SAI_TBCTN:
case FSL_SAI_TTCAP:
case FSL_SAI_RTCTL:
case FSL_SAI_RBCTN:
case FSL_SAI_RTCAP:
return true ;
default :
return false ;
}
}
static bool fsl_sai_volatile_reg(struct device *dev, unsigned int reg)
{
struct fsl_sai *sai = dev_get_drvdata(dev);
unsigned int ofs = sai->soc_data->reg_offset;
if (reg == FSL_SAI_TCSR(ofs) || reg == FSL_SAI_RCSR(ofs))
return true ;
/* Set VERID and PARAM be volatile for reading value in probe */
if (ofs == 8 && (reg == FSL_SAI_VERID || reg == FSL_SAI_PARAM))
return true ;
switch (reg) {
case FSL_SAI_TFR0:
case FSL_SAI_TFR1:
case FSL_SAI_TFR2:
case FSL_SAI_TFR3:
case FSL_SAI_TFR4:
case FSL_SAI_TFR5:
case FSL_SAI_TFR6:
case FSL_SAI_TFR7:
case FSL_SAI_RFR0:
case FSL_SAI_RFR1:
case FSL_SAI_RFR2:
case FSL_SAI_RFR3:
case FSL_SAI_RFR4:
case FSL_SAI_RFR5:
case FSL_SAI_RFR6:
case FSL_SAI_RFR7:
case FSL_SAI_RDR0:
case FSL_SAI_RDR1:
case FSL_SAI_RDR2:
case FSL_SAI_RDR3:
case FSL_SAI_RDR4:
case FSL_SAI_RDR5:
case FSL_SAI_RDR6:
case FSL_SAI_RDR7:
return true ;
default :
return false ;
}
}
static bool fsl_sai_writeable_reg(struct device *dev, unsigned int reg)
{
struct fsl_sai *sai = dev_get_drvdata(dev);
unsigned int ofs = sai->soc_data->reg_offset;
if (reg >= FSL_SAI_TCSR(ofs) && reg <= FSL_SAI_TCR5(ofs))
return true ;
if (reg >= FSL_SAI_RCSR(ofs) && reg <= FSL_SAI_RCR5(ofs))
return true ;
switch (reg) {
case FSL_SAI_TDR0:
case FSL_SAI_TDR1:
case FSL_SAI_TDR2:
case FSL_SAI_TDR3:
case FSL_SAI_TDR4:
case FSL_SAI_TDR5:
case FSL_SAI_TDR6:
case FSL_SAI_TDR7:
case FSL_SAI_TMR:
case FSL_SAI_RMR:
case FSL_SAI_MCTL:
case FSL_SAI_MDIV:
case FSL_SAI_TTCTL:
case FSL_SAI_RTCTL:
return true ;
default :
return false ;
}
}
static struct regmap_config fsl_sai_regmap_config = {
.reg_bits = 32 ,
.reg_stride = 4 ,
.val_bits = 32 ,
.fast_io = true ,
.max_register = FSL_SAI_RMR,
.reg_defaults = fsl_sai_reg_defaults_ofs0,
.num_reg_defaults = ARRAY_SIZE(fsl_sai_reg_defaults_ofs0),
.readable_reg = fsl_sai_readable_reg,
.volatile_reg = fsl_sai_volatile_reg,
.writeable_reg = fsl_sai_writeable_reg,
.cache_type = REGCACHE_FLAT,
};
static int fsl_sai_check_version(struct device *dev)
{
struct fsl_sai *sai = dev_get_drvdata(dev);
unsigned char ofs = sai->soc_data->reg_offset;
unsigned int val;
int ret;
if (FSL_SAI_TCSR(ofs) == FSL_SAI_VERID)
return 0 ;
ret = regmap_read(sai->regmap, FSL_SAI_VERID, &val);
if (ret < 0 )
return ret;
dev_dbg(dev, "VERID: 0x%016X\n" , val);
sai->verid.version = val &
(FSL_SAI_VERID_MAJOR_MASK | FSL_SAI_VERID_MINOR_MASK);
sai->verid.version >>= FSL_SAI_VERID_MINOR_SHIFT;
sai->verid.feature = val & FSL_SAI_VERID_FEATURE_MASK;
ret = regmap_read(sai->regmap, FSL_SAI_PARAM, &val);
if (ret < 0 )
return ret;
dev_dbg(dev, "PARAM: 0x%016X\n" , val);
/* Max slots per frame, power of 2 */
sai->param.slot_num = 1 <<
((val & FSL_SAI_PARAM_SPF_MASK) >> FSL_SAI_PARAM_SPF_SHIFT);
/* Words per fifo, power of 2 */
sai->param.fifo_depth = 1 <<
((val & FSL_SAI_PARAM_WPF_MASK) >> FSL_SAI_PARAM_WPF_SHIFT);
/* Number of datalines implemented */
sai->param.dataline = val & FSL_SAI_PARAM_DLN_MASK;
return 0 ;
}
/*
* Calculate the offset between first two datalines , don ' t
* different offset in one case .
*/
static unsigned int fsl_sai_calc_dl_off(unsigned long dl_mask)
{
int fbidx, nbidx, offset;
fbidx = find_first_bit(&dl_mask, FSL_SAI_DL_NUM);
nbidx = find_next_bit(&dl_mask, FSL_SAI_DL_NUM, fbidx + 1 );
offset = nbidx - fbidx - 1 ;
return (offset < 0 || offset >= (FSL_SAI_DL_NUM - 1 ) ? 0 : offset);
}
/*
* read the fsl , dataline property from dts file .
* It has 3 value for each configuration , first one means the type :
* I2S ( 1 ) or PDM ( 2 ) , second one is dataline mask for ' rx ' , third one is
* dataline mask for ' tx ' . for example
*
* fsl , dataline = < 1 0 xff 0 xff 2 0 xff 0 x11 > ,
*
* It means I2S type rx mask is 0 xff , tx mask is 0 xff , PDM type
* rx mask is 0 xff , tx mask is 0 x11 ( dataline 1 and 4 enabled ) .
*
*/
static int fsl_sai_read_dlcfg(struct fsl_sai *sai)
{
struct platform_device *pdev = sai->pdev;
struct device_node *np = pdev->dev.of_node;
struct device *dev = &pdev->dev;
int ret, elems, i, index, num_cfg;
char *propname = "fsl,dataline" ;
struct fsl_sai_dl_cfg *cfg;
unsigned long dl_mask;
unsigned int soc_dl;
u32 rx, tx, type;
elems = of_property_count_u32_elems(np, propname);
if (elems <= 0 ) {
elems = 0 ;
} else if (elems % 3 ) {
dev_err(dev, "Number of elements must be divisible to 3.\n" );
return -EINVAL;
}
num_cfg = elems / 3 ;
/* Add one more for default value */
cfg = devm_kzalloc(&pdev->dev, (num_cfg + 1 ) * sizeof (*cfg), GFP_KERNEL);
if (!cfg)
return -ENOMEM;
/* Consider default value "0 0xFF 0xFF" if property is missing */
soc_dl = BIT(sai->soc_data->pins) - 1 ;
cfg[0 ].type = FSL_SAI_DL_DEFAULT;
cfg[0 ].pins[0 ] = sai->soc_data->pins;
cfg[0 ].mask[0 ] = soc_dl;
cfg[0 ].start_off[0 ] = 0 ;
cfg[0 ].next_off[0 ] = 0 ;
cfg[0 ].pins[1 ] = sai->soc_data->pins;
cfg[0 ].mask[1 ] = soc_dl;
cfg[0 ].start_off[1 ] = 0 ;
cfg[0 ].next_off[1 ] = 0 ;
for (i = 1 , index = 0 ; i < num_cfg + 1 ; i++) {
/*
* type of dataline
* 0 means default mode
* 1 means I2S mode
* 2 means PDM mode
*/
ret = of_property_read_u32_index(np, propname, index++, &type);
if (ret)
return -EINVAL;
ret = of_property_read_u32_index(np, propname, index++, &rx);
if (ret)
return -EINVAL;
ret = of_property_read_u32_index(np, propname, index++, &tx);
if (ret)
return -EINVAL;
if ((rx & ~soc_dl) || (tx & ~soc_dl)) {
dev_err(dev, "dataline cfg[%d] setting error, mask is 0x%x\n" , i, soc_dl);
return -EINVAL;
}
rx = rx & soc_dl;
tx = tx & soc_dl;
cfg[i].type = type;
cfg[i].pins[0 ] = hweight8(rx);
cfg[i].mask[0 ] = rx;
dl_mask = rx;
cfg[i].start_off[0 ] = find_first_bit(&dl_mask, FSL_SAI_DL_NUM);
cfg[i].next_off[0 ] = fsl_sai_calc_dl_off(rx);
cfg[i].pins[1 ] = hweight8(tx);
cfg[i].mask[1 ] = tx;
dl_mask = tx;
cfg[i].start_off[1 ] = find_first_bit(&dl_mask, FSL_SAI_DL_NUM);
cfg[i].next_off[1 ] = fsl_sai_calc_dl_off(tx);
}
sai->dl_cfg = cfg;
sai->dl_cfg_cnt = num_cfg + 1 ;
return 0 ;
}
static int fsl_sai_runtime_suspend(struct device *dev);
static int fsl_sai_runtime_resume(struct device *dev);
static int fsl_sai_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
struct device *dev = &pdev->dev;
struct fsl_sai *sai;
struct regmap *gpr;
void __iomem *base;
char tmp[8 ];
int irq, ret, i;
int index;
u32 dmas[4 ];
sai = devm_kzalloc(dev, sizeof (*sai), GFP_KERNEL);
if (!sai)
return -ENOMEM;
sai->pdev = pdev;
sai->soc_data = of_device_get_match_data(dev);
sai->is_lsb_first = of_property_read_bool(np, "lsb-first" );
base = devm_platform_get_and_ioremap_resource(pdev, 0 , &sai->res);
if (IS_ERR(base))
return PTR_ERR(base);
if (sai->soc_data->reg_offset == 8 ) {
fsl_sai_regmap_config.reg_defaults = fsl_sai_reg_defaults_ofs8;
fsl_sai_regmap_config.max_register = FSL_SAI_MDIV;
fsl_sai_regmap_config.num_reg_defaults =
ARRAY_SIZE(fsl_sai_reg_defaults_ofs8);
}
sai->regmap = devm_regmap_init_mmio(dev, base, &fsl_sai_regmap_config);
if (IS_ERR(sai->regmap)) {
dev_err(dev, "regmap init failed\n" );
return PTR_ERR(sai->regmap);
}
sai->bus_clk = devm_clk_get(dev, "bus" );
/* Compatible with old DTB cases */
if (IS_ERR(sai->bus_clk) && PTR_ERR(sai->bus_clk) != -EPROBE_DEFER)
sai->bus_clk = devm_clk_get(dev, "sai" );
if (IS_ERR(sai->bus_clk)) {
dev_err(dev, "failed to get bus clock: %ld\n" ,
PTR_ERR(sai->bus_clk));
/* -EPROBE_DEFER */
return PTR_ERR(sai->bus_clk);
}
for (i = 1 ; i < FSL_SAI_MCLK_MAX; i++) {
sprintf(tmp, "mclk%d" , i);
sai->mclk_clk[i] = devm_clk_get(dev, tmp);
if (IS_ERR(sai->mclk_clk[i])) {
dev_err(dev, "failed to get mclk%d clock: %ld\n" ,
i, PTR_ERR(sai->mclk_clk[i]));
sai->mclk_clk[i] = NULL;
}
}
if (sai->soc_data->mclk0_is_mclk1)
sai->mclk_clk[0 ] = sai->mclk_clk[1 ];
else
sai->mclk_clk[0 ] = sai->bus_clk;
fsl_asoc_get_pll_clocks(&pdev->dev, &sai->pll8k_clk,
&sai->pll11k_clk);
fsl_asoc_constrain_rates(&sai->constraint_rates,
&fsl_sai_rate_constraints,
sai->pll8k_clk, sai->pll11k_clk, NULL,
sai->constraint_rates_list);
/* Use Multi FIFO mode depending on the support from SDMA script */
ret = of_property_read_u32_array(np, "dmas" , dmas, 4 );
if (!sai->soc_data->use_edma && !ret && dmas[2 ] == IMX_DMATYPE_MULTI_SAI)
sai->is_multi_fifo_dma = true ;
/* read dataline mask for rx and tx*/
ret = fsl_sai_read_dlcfg(sai);
if (ret < 0 ) {
dev_err(dev, "failed to read dlcfg %d\n" , ret);
return ret;
}
irq = platform_get_irq(pdev, 0 );
if (irq < 0 )
return irq;
ret = devm_request_irq(dev, irq, fsl_sai_isr, IRQF_SHARED,
np->name, sai);
if (ret) {
dev_err(dev, "failed to claim irq %u\n" , irq);
return ret;
}
memcpy(&sai->cpu_dai_drv, fsl_sai_dai_template,
sizeof (*fsl_sai_dai_template) * ARRAY_SIZE(fsl_sai_dai_template));
/* Sync Tx with Rx as default by following old DT binding */
sai->synchronous[RX] = true ;
sai->synchronous[TX] = false ;
sai->cpu_dai_drv[0 ].symmetric_rate = 1 ;
sai->cpu_dai_drv[0 ].symmetric_channels = 1 ;
sai->cpu_dai_drv[0 ].symmetric_sample_bits = 1 ;
if (of_property_read_bool(np, "fsl,sai-synchronous-rx" ) &&
of_property_read_bool(np, "fsl,sai-asynchronous" )) {
/* error out if both synchronous and asynchronous are present */
dev_err(dev, "invalid binding for synchronous mode\n" );
return -EINVAL;
}
if (of_property_read_bool(np, "fsl,sai-synchronous-rx" )) {
/* Sync Rx with Tx */
sai->synchronous[RX] = false ;
sai->synchronous[TX] = true ;
} else if (of_property_read_bool(np, "fsl,sai-asynchronous" )) {
/* Discard all settings for asynchronous mode */
sai->synchronous[RX] = false ;
sai->synchronous[TX] = false ;
sai->cpu_dai_drv[0 ].symmetric_rate = 0 ;
sai->cpu_dai_drv[0 ].symmetric_channels = 0 ;
sai->cpu_dai_drv[0 ].symmetric_sample_bits = 0 ;
}
sai->mclk_direction_output = of_property_read_bool(np, "fsl,sai-mclk-direction-output" );
if (sai->mclk_direction_output &&
of_device_is_compatible(np, "fsl,imx6ul-sai" )) {
gpr = syscon_regmap_lookup_by_compatible("fsl,imx6ul-iomuxc-gpr" );
if (IS_ERR(gpr)) {
dev_err(dev, "cannot find iomuxc registers\n" );
return PTR_ERR(gpr);
}
index = of_alias_get_id(np, "sai" );
if (index < 0 )
return index;
regmap_update_bits(gpr, IOMUXC_GPR1, MCLK_DIR(index),
MCLK_DIR(index));
}
sai->dma_params_rx.addr = sai->res->start + FSL_SAI_RDR0;
sai->dma_params_tx.addr = sai->res->start + FSL_SAI_TDR0;
sai->dma_params_rx.maxburst =
sai->soc_data->max_burst[RX] ? sai->soc_data->max_burst[RX] : FSL_SAI_MAXBURST_RX;
sai->dma_params_tx.maxburst =
sai->soc_data->max_burst[TX] ? sai->soc_data->max_burst[TX] : FSL_SAI_MAXBURST_TX;
sai->pinctrl = devm_pinctrl_get(&pdev->dev);
platform_set_drvdata(pdev, sai);
pm_runtime_enable(dev);
if (!pm_runtime_enabled(dev)) {
ret = fsl_sai_runtime_resume(dev);
if (ret)
goto err_pm_disable;
}
ret = pm_runtime_resume_and_get(dev);
if (ret < 0 )
goto err_pm_get_sync;
/* Get sai version */
ret = fsl_sai_check_version(dev);
if (ret < 0 )
dev_warn(dev, "Error reading SAI version: %d\n" , ret);
/* Select MCLK direction */
if (sai->mclk_direction_output &&
sai->soc_data->max_register >= FSL_SAI_MCTL) {
regmap_update_bits(sai->regmap, FSL_SAI_MCTL,
FSL_SAI_MCTL_MCLK_EN, FSL_SAI_MCTL_MCLK_EN);
}
ret = pm_runtime_put_sync(dev);
if (ret < 0 && ret != -ENOSYS)
goto err_pm_get_sync;
/*
* Register platform component before registering cpu dai for there
* is not defer probe for platform component in snd_soc_add_pcm_runtime ( ) .
*/
if (sai->soc_data->use_imx_pcm) {
ret = imx_pcm_dma_init(pdev);
if (ret) {
dev_err_probe(dev, ret, "PCM DMA init failed\n" );
if (!IS_ENABLED(CONFIG_SND_SOC_IMX_PCM_DMA))
dev_err(dev, "Error: You must enable the imx-pcm-dma support!\n" );
goto err_pm_get_sync;
}
} else {
ret = devm_snd_dmaengine_pcm_register(dev, NULL, 0 );
if (ret) {
dev_err_probe(dev, ret, "Registering PCM dmaengine failed\n" );
goto err_pm_get_sync;
}
}
ret = devm_snd_soc_register_component(dev, &fsl_component,
sai->cpu_dai_drv, ARRAY_SIZE(fsl_sai_dai_template));
if (ret)
goto err_pm_get_sync;
return ret;
err_pm_get_sync:
if (!pm_runtime_status_suspended(dev))
fsl_sai_runtime_suspend(dev);
err_pm_disable:
pm_runtime_disable(dev);
return ret;
}
static void fsl_sai_remove(struct platform_device *pdev)
{
pm_runtime_disable(&pdev->dev);
if (!pm_runtime_status_suspended(&pdev->dev))
fsl_sai_runtime_suspend(&pdev->dev);
}
static const struct fsl_sai_soc_data fsl_sai_vf610_data = {
.use_imx_pcm = false ,
.use_edma = false ,
.fifo_depth = 32 ,
.pins = 1 ,
.reg_offset = 0 ,
.mclk0_is_mclk1 = false ,
.flags = 0 ,
.max_register = FSL_SAI_RMR,
};
static const struct fsl_sai_soc_data fsl_sai_imx6sx_data = {
.use_imx_pcm = true ,
.use_edma = false ,
.fifo_depth = 32 ,
.pins = 1 ,
.reg_offset = 0 ,
.mclk0_is_mclk1 = true ,
.flags = 0 ,
.max_register = FSL_SAI_RMR,
};
static const struct fsl_sai_soc_data fsl_sai_imx7ulp_data = {
.use_imx_pcm = true ,
.use_edma = false ,
.fifo_depth = 16 ,
.pins = 2 ,
.reg_offset = 8 ,
.mclk0_is_mclk1 = false ,
.flags = PMQOS_CPU_LATENCY,
.max_register = FSL_SAI_RMR,
};
static const struct fsl_sai_soc_data fsl_sai_imx8mq_data = {
.use_imx_pcm = true ,
.use_edma = false ,
.fifo_depth = 128 ,
.pins = 8 ,
.reg_offset = 8 ,
.mclk0_is_mclk1 = false ,
.flags = 0 ,
.max_register = FSL_SAI_RMR,
};
static const struct fsl_sai_soc_data fsl_sai_imx8qm_data = {
.use_imx_pcm = true ,
.use_edma = true ,
.fifo_depth = 64 ,
.pins = 4 ,
.reg_offset = 0 ,
.mclk0_is_mclk1 = false ,
.flags = 0 ,
.max_register = FSL_SAI_RMR,
};
static const struct fsl_sai_soc_data fsl_sai_imx8mm_data = {
.use_imx_pcm = true ,
.use_edma = false ,
.fifo_depth = 128 ,
.reg_offset = 8 ,
.mclk0_is_mclk1 = false ,
.pins = 8 ,
.flags = 0 ,
.max_register = FSL_SAI_MCTL,
};
static const struct fsl_sai_soc_data fsl_sai_imx8mn_data = {
.use_imx_pcm = true ,
.use_edma = false ,
.fifo_depth = 128 ,
.reg_offset = 8 ,
.mclk0_is_mclk1 = false ,
.pins = 8 ,
.flags = 0 ,
.max_register = FSL_SAI_MDIV,
};
static const struct fsl_sai_soc_data fsl_sai_imx8mp_data = {
.use_imx_pcm = true ,
.use_edma = false ,
.fifo_depth = 128 ,
.reg_offset = 8 ,
.mclk0_is_mclk1 = false ,
.pins = 8 ,
.flags = 0 ,
.max_register = FSL_SAI_MDIV,
.mclk_with_tere = true ,
};
static const struct fsl_sai_soc_data fsl_sai_imx8ulp_data = {
.use_imx_pcm = true ,
.use_edma = true ,
.fifo_depth = 16 ,
.reg_offset = 8 ,
.mclk0_is_mclk1 = false ,
.pins = 4 ,
.flags = PMQOS_CPU_LATENCY,
.max_register = FSL_SAI_RTCAP,
};
static const struct fsl_sai_soc_data fsl_sai_imx93_data = {
.use_imx_pcm = true ,
.use_edma = true ,
.fifo_depth = 128 ,
.reg_offset = 8 ,
.mclk0_is_mclk1 = false ,
.pins = 4 ,
.flags = 0 ,
.max_register = FSL_SAI_MCTL,
.max_burst = {8 , 8 },
};
static const struct fsl_sai_soc_data fsl_sai_imx95_data = {
.use_imx_pcm = true ,
.use_edma = true ,
.fifo_depth = 128 ,
.reg_offset = 8 ,
.mclk0_is_mclk1 = false ,
.pins = 8 ,
.flags = 0 ,
.max_register = FSL_SAI_MCTL,
.max_burst = {8 , 8 },
};
static const struct of_device_id fsl_sai_ids[] = {
{ .compatible = "fsl,vf610-sai" , .data = &fsl_sai_vf610_data },
{ .compatible = "fsl,imx6sx-sai" , .data = &fsl_sai_imx6sx_data },
{ .compatible = "fsl,imx6ul-sai" , .data = &fsl_sai_imx6sx_data },
{ .compatible = "fsl,imx7ulp-sai" , .data = &fsl_sai_imx7ulp_data },
{ .compatible = "fsl,imx8mq-sai" , .data = &fsl_sai_imx8mq_data },
{ .compatible = "fsl,imx8qm-sai" , .data = &fsl_sai_imx8qm_data },
{ .compatible = "fsl,imx8mm-sai" , .data = &fsl_sai_imx8mm_data },
{ .compatible = "fsl,imx8mp-sai" , .data = &fsl_sai_imx8mp_data },
{ .compatible = "fsl,imx8ulp-sai" , .data = &fsl_sai_imx8ulp_data },
{ .compatible = "fsl,imx8mn-sai" , .data = &fsl_sai_imx8mn_data },
{ .compatible = "fsl,imx93-sai" , .data = &fsl_sai_imx93_data },
{ .compatible = "fsl,imx95-sai" , .data = &fsl_sai_imx95_data },
{ /* sentinel */ }
};
MODULE_DEVICE_TABLE(of, fsl_sai_ids);
static int fsl_sai_runtime_suspend(struct device *dev)
{
struct fsl_sai *sai = dev_get_drvdata(dev);
if (sai->mclk_streams & BIT(SNDRV_PCM_STREAM_CAPTURE))
clk_disable_unprepare(sai->mclk_clk[sai->mclk_id[0 ]]);
if (sai->mclk_streams & BIT(SNDRV_PCM_STREAM_PLAYBACK))
clk_disable_unprepare(sai->mclk_clk[sai->mclk_id[1 ]]);
clk_disable_unprepare(sai->bus_clk);
if (sai->soc_data->flags & PMQOS_CPU_LATENCY)
cpu_latency_qos_remove_request(&sai->pm_qos_req);
regcache_cache_only(sai->regmap, true );
return 0 ;
}
static int fsl_sai_runtime_resume(struct device *dev)
{
struct fsl_sai *sai = dev_get_drvdata(dev);
unsigned int ofs = sai->soc_data->reg_offset;
int ret;
ret = clk_prepare_enable(sai->bus_clk);
if (ret) {
dev_err(dev, "failed to enable bus clock: %d\n" , ret);
return ret;
}
if (sai->mclk_streams & BIT(SNDRV_PCM_STREAM_PLAYBACK)) {
ret = clk_prepare_enable(sai->mclk_clk[sai->mclk_id[1 ]]);
if (ret)
goto disable_bus_clk;
}
if (sai->mclk_streams & BIT(SNDRV_PCM_STREAM_CAPTURE)) {
ret = clk_prepare_enable(sai->mclk_clk[sai->mclk_id[0 ]]);
if (ret)
goto disable_tx_clk;
}
if (sai->soc_data->flags & PMQOS_CPU_LATENCY)
cpu_latency_qos_add_request(&sai->pm_qos_req, 0 );
regcache_cache_only(sai->regmap, false );
regcache_mark_dirty(sai->regmap);
regmap_update_bits(sai->regmap, FSL_SAI_TCSR(ofs), FSL_SAI_CSR_SR, FSL_SAI_CSR_SR);
regmap_update_bits(sai->regmap, FSL_SAI_RCSR(ofs), FSL_SAI_CSR_SR, FSL_SAI_CSR_SR);
usleep_range(1000 , 2000 );
regmap_update_bits(sai->regmap, FSL_SAI_TCSR(ofs), FSL_SAI_CSR_SR, 0 );
regmap_update_bits(sai->regmap, FSL_SAI_RCSR(ofs), FSL_SAI_CSR_SR, 0 );
ret = regcache_sync(sai->regmap);
if (ret)
goto disable_rx_clk;
if (sai->soc_data->mclk_with_tere && sai->mclk_direction_output)
regmap_update_bits(sai->regmap, FSL_SAI_TCSR(ofs),
FSL_SAI_CSR_TERE, FSL_SAI_CSR_TERE);
return 0 ;
disable_rx_clk:
if (sai->mclk_streams & BIT(SNDRV_PCM_STREAM_CAPTURE))
clk_disable_unprepare(sai->mclk_clk[sai->mclk_id[0 ]]);
disable_tx_clk:
if (sai->mclk_streams & BIT(SNDRV_PCM_STREAM_PLAYBACK))
clk_disable_unprepare(sai->mclk_clk[sai->mclk_id[1 ]]);
disable_bus_clk:
clk_disable_unprepare(sai->bus_clk);
return ret;
}
static const struct dev_pm_ops fsl_sai_pm_ops = {
RUNTIME_PM_OPS(fsl_sai_runtime_suspend, fsl_sai_runtime_resume, NULL)
SYSTEM_SLEEP_PM_OPS(pm_runtime_force_suspend, pm_runtime_force_resume)
};
static struct platform_driver fsl_sai_driver = {
.probe = fsl_sai_probe,
.remove = fsl_sai_remove,
.driver = {
.name = "fsl-sai" ,
.pm = pm_ptr(&fsl_sai_pm_ops),
.of_match_table = fsl_sai_ids,
},
};
module_platform_driver(fsl_sai_driver);
MODULE_DESCRIPTION("Freescale Soc SAI Interface" );
MODULE_AUTHOR("Xiubo Li, <Li.Xiubo@freescale.com>" );
MODULE_ALIAS("platform:fsl-sai" );
MODULE_LICENSE("GPL" );
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