mirror of https://gitee.com/openkylin/linux.git
970 lines
25 KiB
C
970 lines
25 KiB
C
/*
|
|
* Freescale ALSA SoC Digital Audio Interface (SAI) driver.
|
|
*
|
|
* Copyright 2012-2015 Freescale Semiconductor, Inc.
|
|
*
|
|
* This program is free software, you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the
|
|
* Free Software Foundation, either version 2 of the License, or(at your
|
|
* option) any later version.
|
|
*
|
|
*/
|
|
|
|
#include <linux/clk.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/dmaengine.h>
|
|
#include <linux/module.h>
|
|
#include <linux/of_address.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 "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
|
|
};
|
|
|
|
static const struct snd_pcm_hw_constraint_list fsl_sai_rate_constraints = {
|
|
.count = ARRAY_SIZE(fsl_sai_rates),
|
|
.list = fsl_sai_rates,
|
|
};
|
|
|
|
static irqreturn_t fsl_sai_isr(int irq, void *devid)
|
|
{
|
|
struct fsl_sai *sai = (struct fsl_sai *)devid;
|
|
struct device *dev = &sai->pdev->dev;
|
|
u32 flags, xcsr, mask;
|
|
bool irq_none = true;
|
|
|
|
/*
|
|
* 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, &xcsr);
|
|
flags = xcsr & mask;
|
|
|
|
if (flags)
|
|
irq_none = false;
|
|
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_warn(dev, "isr: Tx Frame sync error detected\n");
|
|
|
|
if (flags & FSL_SAI_CSR_FEF) {
|
|
dev_warn(dev, "isr: Transmit underrun detected\n");
|
|
/* FIFO reset for safety */
|
|
xcsr |= FSL_SAI_CSR_FR;
|
|
}
|
|
|
|
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, flags | xcsr);
|
|
|
|
irq_rx:
|
|
/* Rx IRQ */
|
|
regmap_read(sai->regmap, FSL_SAI_RCSR, &xcsr);
|
|
flags = xcsr & mask;
|
|
|
|
if (flags)
|
|
irq_none = false;
|
|
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_warn(dev, "isr: Rx Frame sync error detected\n");
|
|
|
|
if (flags & FSL_SAI_CSR_FEF) {
|
|
dev_warn(dev, "isr: Receive overflow detected\n");
|
|
/* FIFO reset for safety */
|
|
xcsr |= FSL_SAI_CSR_FR;
|
|
}
|
|
|
|
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, flags | xcsr);
|
|
|
|
out:
|
|
if (irq_none)
|
|
return IRQ_NONE;
|
|
else
|
|
return IRQ_HANDLED;
|
|
}
|
|
|
|
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)
|
|
{
|
|
struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai);
|
|
|
|
sai->slots = slots;
|
|
sai->slot_width = slot_width;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int fsl_sai_set_dai_sysclk_tr(struct snd_soc_dai *cpu_dai,
|
|
int clk_id, unsigned int freq, int fsl_dir)
|
|
{
|
|
struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai);
|
|
bool tx = fsl_dir == FSL_FMT_TRANSMITTER;
|
|
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),
|
|
FSL_SAI_CR2_MSEL_MASK, val_cr2);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int fsl_sai_set_dai_sysclk(struct snd_soc_dai *cpu_dai,
|
|
int clk_id, unsigned int freq, int dir)
|
|
{
|
|
int ret;
|
|
|
|
if (dir == SND_SOC_CLOCK_IN)
|
|
return 0;
|
|
|
|
ret = fsl_sai_set_dai_sysclk_tr(cpu_dai, clk_id, freq,
|
|
FSL_FMT_TRANSMITTER);
|
|
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,
|
|
FSL_FMT_RECEIVER);
|
|
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, int fsl_dir)
|
|
{
|
|
struct fsl_sai *sai = snd_soc_dai_get_drvdata(cpu_dai);
|
|
bool tx = fsl_dir == FSL_FMT_TRANSMITTER;
|
|
u32 val_cr2 = 0, val_cr4 = 0;
|
|
|
|
if (!sai->is_lsb_first)
|
|
val_cr4 |= FSL_SAI_CR4_MF;
|
|
|
|
/* DAI mode */
|
|
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
|
|
case SND_SOC_DAIFMT_I2S:
|
|
/*
|
|
* Frame low, 1clk 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, 1clk 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 = 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 = 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 master masks */
|
|
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
|
|
case SND_SOC_DAIFMT_CBS_CFS:
|
|
val_cr2 |= FSL_SAI_CR2_BCD_MSTR;
|
|
val_cr4 |= FSL_SAI_CR4_FSD_MSTR;
|
|
break;
|
|
case SND_SOC_DAIFMT_CBM_CFM:
|
|
sai->is_slave_mode = true;
|
|
break;
|
|
case SND_SOC_DAIFMT_CBS_CFM:
|
|
val_cr2 |= FSL_SAI_CR2_BCD_MSTR;
|
|
break;
|
|
case SND_SOC_DAIFMT_CBM_CFS:
|
|
val_cr4 |= FSL_SAI_CR4_FSD_MSTR;
|
|
sai->is_slave_mode = true;
|
|
break;
|
|
default:
|
|
return -EINVAL;
|
|
}
|
|
|
|
regmap_update_bits(sai->regmap, FSL_SAI_xCR2(tx),
|
|
FSL_SAI_CR2_BCP | FSL_SAI_CR2_BCD_MSTR, val_cr2);
|
|
regmap_update_bits(sai->regmap, FSL_SAI_xCR4(tx),
|
|
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, FSL_FMT_TRANSMITTER);
|
|
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, FSL_FMT_RECEIVER);
|
|
if (ret)
|
|
dev_err(cpu_dai->dev, "Cannot set rx format: %d\n", ret);
|
|
|
|
return ret;
|
|
}
|
|
|
|
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 long clk_rate;
|
|
u32 savediv = 0, ratio, savesub = freq;
|
|
u32 id;
|
|
int ret = 0;
|
|
|
|
/* Don't apply to slave mode */
|
|
if (sai->is_slave_mode)
|
|
return 0;
|
|
|
|
for (id = 0; id < FSL_SAI_MCLK_MAX; id++) {
|
|
clk_rate = clk_get_rate(sai->mclk_clk[id]);
|
|
if (!clk_rate)
|
|
continue;
|
|
|
|
ratio = clk_rate / freq;
|
|
|
|
ret = clk_rate - ratio * freq;
|
|
|
|
/*
|
|
* Drop the source that can not be
|
|
* divided into the required rate.
|
|
*/
|
|
if (ret != 0 && clk_rate / ret < 1000)
|
|
continue;
|
|
|
|
dev_dbg(dai->dev,
|
|
"ratio %d for freq %dHz based on clock %ldHz\n",
|
|
ratio, freq, clk_rate);
|
|
|
|
if (ratio % 2 == 0 && ratio >= 2 && ratio <= 512)
|
|
ratio /= 2;
|
|
else
|
|
continue;
|
|
|
|
if (ret < savesub) {
|
|
savediv = ratio;
|
|
sai->mclk_id[tx] = id;
|
|
savesub = ret;
|
|
}
|
|
|
|
if (ret == 0)
|
|
break;
|
|
}
|
|
|
|
if (savediv == 0) {
|
|
dev_err(dai->dev, "failed to derive required %cx rate: %d\n",
|
|
tx ? 'T' : 'R', freq);
|
|
return -EINVAL;
|
|
}
|
|
|
|
/*
|
|
* 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 ((sai->synchronous[TX] && !sai->synchronous[RX]) ||
|
|
(!tx && !sai->synchronous[RX])) {
|
|
regmap_update_bits(sai->regmap, FSL_SAI_RCR2,
|
|
FSL_SAI_CR2_MSEL_MASK,
|
|
FSL_SAI_CR2_MSEL(sai->mclk_id[tx]));
|
|
regmap_update_bits(sai->regmap, FSL_SAI_RCR2,
|
|
FSL_SAI_CR2_DIV_MASK, savediv - 1);
|
|
} else if ((sai->synchronous[RX] && !sai->synchronous[TX]) ||
|
|
(tx && !sai->synchronous[TX])) {
|
|
regmap_update_bits(sai->regmap, FSL_SAI_TCR2,
|
|
FSL_SAI_CR2_MSEL_MASK,
|
|
FSL_SAI_CR2_MSEL(sai->mclk_id[tx]));
|
|
regmap_update_bits(sai->regmap, FSL_SAI_TCR2,
|
|
FSL_SAI_CR2_DIV_MASK, savediv - 1);
|
|
}
|
|
|
|
dev_dbg(dai->dev, "best fit: clock id=%d, div=%d, deviation =%d\n",
|
|
sai->mclk_id[tx], savediv, savesub);
|
|
|
|
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);
|
|
bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
|
|
unsigned int channels = params_channels(params);
|
|
u32 word_width = params_width(params);
|
|
u32 val_cr4 = 0, val_cr5 = 0;
|
|
u32 slots = (channels == 1) ? 2 : channels;
|
|
u32 slot_width = word_width;
|
|
int ret;
|
|
|
|
if (sai->slots)
|
|
slots = sai->slots;
|
|
|
|
if (sai->slot_width)
|
|
slot_width = sai->slot_width;
|
|
|
|
if (!sai->is_slave_mode) {
|
|
ret = fsl_sai_set_bclk(cpu_dai, tx,
|
|
slots * slot_width * params_rate(params));
|
|
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)
|
|
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);
|
|
|
|
/*
|
|
* For SAI master mode, when Tx(Rx) sync with Rx(Tx) clock, Rx(Tx) will
|
|
* generate bclk and frame clock for Tx(Rx), we should set RCR4(TCR4),
|
|
* RCR5(TCR5) and RMR(TMR) for playback(capture), or there will be sync
|
|
* error.
|
|
*/
|
|
|
|
if (!sai->is_slave_mode) {
|
|
if (!sai->synchronous[TX] && sai->synchronous[RX] && !tx) {
|
|
regmap_update_bits(sai->regmap, FSL_SAI_TCR4,
|
|
FSL_SAI_CR4_SYWD_MASK | FSL_SAI_CR4_FRSZ_MASK,
|
|
val_cr4);
|
|
regmap_update_bits(sai->regmap, FSL_SAI_TCR5,
|
|
FSL_SAI_CR5_WNW_MASK | FSL_SAI_CR5_W0W_MASK |
|
|
FSL_SAI_CR5_FBT_MASK, val_cr5);
|
|
regmap_write(sai->regmap, FSL_SAI_TMR,
|
|
~0UL - ((1 << channels) - 1));
|
|
} else if (!sai->synchronous[RX] && sai->synchronous[TX] && tx) {
|
|
regmap_update_bits(sai->regmap, FSL_SAI_RCR4,
|
|
FSL_SAI_CR4_SYWD_MASK | FSL_SAI_CR4_FRSZ_MASK,
|
|
val_cr4);
|
|
regmap_update_bits(sai->regmap, FSL_SAI_RCR5,
|
|
FSL_SAI_CR5_WNW_MASK | FSL_SAI_CR5_W0W_MASK |
|
|
FSL_SAI_CR5_FBT_MASK, val_cr5);
|
|
regmap_write(sai->regmap, FSL_SAI_RMR,
|
|
~0UL - ((1 << channels) - 1));
|
|
}
|
|
}
|
|
|
|
regmap_update_bits(sai->regmap, FSL_SAI_xCR4(tx),
|
|
FSL_SAI_CR4_SYWD_MASK | FSL_SAI_CR4_FRSZ_MASK,
|
|
val_cr4);
|
|
regmap_update_bits(sai->regmap, FSL_SAI_xCR5(tx),
|
|
FSL_SAI_CR5_WNW_MASK | FSL_SAI_CR5_W0W_MASK |
|
|
FSL_SAI_CR5_FBT_MASK, val_cr5);
|
|
regmap_write(sai->regmap, FSL_SAI_xMR(tx), ~0UL - ((1 << channels) - 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;
|
|
|
|
if (!sai->is_slave_mode &&
|
|
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 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);
|
|
bool tx = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
|
|
u32 xcsr, count = 100;
|
|
|
|
/*
|
|
* 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, FSL_SAI_CR2_SYNC,
|
|
sai->synchronous[TX] ? FSL_SAI_CR2_SYNC : 0);
|
|
regmap_update_bits(sai->regmap, FSL_SAI_RCR2, 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),
|
|
FSL_SAI_CSR_FRDE, FSL_SAI_CSR_FRDE);
|
|
|
|
regmap_update_bits(sai->regmap, FSL_SAI_RCSR,
|
|
FSL_SAI_CSR_TERE, FSL_SAI_CSR_TERE);
|
|
regmap_update_bits(sai->regmap, FSL_SAI_TCSR,
|
|
FSL_SAI_CSR_TERE, FSL_SAI_CSR_TERE);
|
|
|
|
regmap_update_bits(sai->regmap, FSL_SAI_xCSR(tx),
|
|
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),
|
|
FSL_SAI_CSR_FRDE, 0);
|
|
regmap_update_bits(sai->regmap, FSL_SAI_xCSR(tx),
|
|
FSL_SAI_CSR_xIE_MASK, 0);
|
|
|
|
/* Check if the opposite FRDE is also disabled */
|
|
regmap_read(sai->regmap, FSL_SAI_xCSR(!tx), &xcsr);
|
|
if (!(xcsr & FSL_SAI_CSR_FRDE)) {
|
|
/* Disable both directions and reset their FIFOs */
|
|
regmap_update_bits(sai->regmap, FSL_SAI_TCSR,
|
|
FSL_SAI_CSR_TERE, 0);
|
|
regmap_update_bits(sai->regmap, FSL_SAI_RCSR,
|
|
FSL_SAI_CSR_TERE, 0);
|
|
|
|
/* TERE will remain set till the end of current frame */
|
|
do {
|
|
udelay(10);
|
|
regmap_read(sai->regmap, FSL_SAI_xCSR(tx), &xcsr);
|
|
} while (--count && xcsr & FSL_SAI_CSR_TERE);
|
|
|
|
regmap_update_bits(sai->regmap, FSL_SAI_TCSR,
|
|
FSL_SAI_CSR_FR, FSL_SAI_CSR_FR);
|
|
regmap_update_bits(sai->regmap, FSL_SAI_RCSR,
|
|
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.
|
|
*/
|
|
if (!sai->is_slave_mode) {
|
|
/* Software Reset for both Tx and Rx */
|
|
regmap_write(sai->regmap,
|
|
FSL_SAI_TCSR, FSL_SAI_CSR_SR);
|
|
regmap_write(sai->regmap,
|
|
FSL_SAI_RCSR, FSL_SAI_CSR_SR);
|
|
/* Clear SR bit to finish the reset */
|
|
regmap_write(sai->regmap, FSL_SAI_TCSR, 0);
|
|
regmap_write(sai->regmap, FSL_SAI_RCSR, 0);
|
|
}
|
|
}
|
|
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;
|
|
struct device *dev = &sai->pdev->dev;
|
|
int ret;
|
|
|
|
ret = clk_prepare_enable(sai->bus_clk);
|
|
if (ret) {
|
|
dev_err(dev, "failed to enable bus clock: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
regmap_update_bits(sai->regmap, FSL_SAI_xCR3(tx), FSL_SAI_CR3_TRCE,
|
|
FSL_SAI_CR3_TRCE);
|
|
|
|
ret = snd_pcm_hw_constraint_list(substream->runtime, 0,
|
|
SNDRV_PCM_HW_PARAM_RATE, &fsl_sai_rate_constraints);
|
|
|
|
return ret;
|
|
}
|
|
|
|
static void fsl_sai_shutdown(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;
|
|
|
|
regmap_update_bits(sai->regmap, FSL_SAI_xCR3(tx), FSL_SAI_CR3_TRCE, 0);
|
|
|
|
clk_disable_unprepare(sai->bus_clk);
|
|
}
|
|
|
|
static const struct snd_soc_dai_ops fsl_sai_pcm_dai_ops = {
|
|
.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,
|
|
.shutdown = fsl_sai_shutdown,
|
|
};
|
|
|
|
static int fsl_sai_dai_probe(struct snd_soc_dai *cpu_dai)
|
|
{
|
|
struct fsl_sai *sai = dev_get_drvdata(cpu_dai->dev);
|
|
|
|
/* Software Reset for both Tx and Rx */
|
|
regmap_write(sai->regmap, FSL_SAI_TCSR, FSL_SAI_CSR_SR);
|
|
regmap_write(sai->regmap, FSL_SAI_RCSR, FSL_SAI_CSR_SR);
|
|
/* Clear SR bit to finish the reset */
|
|
regmap_write(sai->regmap, FSL_SAI_TCSR, 0);
|
|
regmap_write(sai->regmap, FSL_SAI_RCSR, 0);
|
|
|
|
regmap_update_bits(sai->regmap, FSL_SAI_TCR1, FSL_SAI_CR1_RFW_MASK,
|
|
FSL_SAI_MAXBURST_TX * 2);
|
|
regmap_update_bits(sai->regmap, FSL_SAI_RCR1, FSL_SAI_CR1_RFW_MASK,
|
|
FSL_SAI_MAXBURST_RX - 1);
|
|
|
|
snd_soc_dai_init_dma_data(cpu_dai, &sai->dma_params_tx,
|
|
&sai->dma_params_rx);
|
|
|
|
snd_soc_dai_set_drvdata(cpu_dai, sai);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static struct snd_soc_dai_driver fsl_sai_dai = {
|
|
.probe = fsl_sai_dai_probe,
|
|
.playback = {
|
|
.stream_name = "CPU-Playback",
|
|
.channels_min = 1,
|
|
.channels_max = 2,
|
|
.rate_min = 8000,
|
|
.rate_max = 192000,
|
|
.rates = SNDRV_PCM_RATE_KNOT,
|
|
.formats = FSL_SAI_FORMATS,
|
|
},
|
|
.capture = {
|
|
.stream_name = "CPU-Capture",
|
|
.channels_min = 1,
|
|
.channels_max = 2,
|
|
.rate_min = 8000,
|
|
.rate_max = 192000,
|
|
.rates = SNDRV_PCM_RATE_KNOT,
|
|
.formats = FSL_SAI_FORMATS,
|
|
},
|
|
.ops = &fsl_sai_pcm_dai_ops,
|
|
};
|
|
|
|
static const struct snd_soc_component_driver fsl_component = {
|
|
.name = "fsl-sai",
|
|
};
|
|
|
|
static struct reg_default fsl_sai_reg_defaults[] = {
|
|
{FSL_SAI_TCR1, 0},
|
|
{FSL_SAI_TCR2, 0},
|
|
{FSL_SAI_TCR3, 0},
|
|
{FSL_SAI_TCR4, 0},
|
|
{FSL_SAI_TCR5, 0},
|
|
{FSL_SAI_TDR, 0},
|
|
{FSL_SAI_TMR, 0},
|
|
{FSL_SAI_RCR1, 0},
|
|
{FSL_SAI_RCR2, 0},
|
|
{FSL_SAI_RCR3, 0},
|
|
{FSL_SAI_RCR4, 0},
|
|
{FSL_SAI_RCR5, 0},
|
|
{FSL_SAI_RMR, 0},
|
|
};
|
|
|
|
static bool fsl_sai_readable_reg(struct device *dev, unsigned int reg)
|
|
{
|
|
switch (reg) {
|
|
case FSL_SAI_TCSR:
|
|
case FSL_SAI_TCR1:
|
|
case FSL_SAI_TCR2:
|
|
case FSL_SAI_TCR3:
|
|
case FSL_SAI_TCR4:
|
|
case FSL_SAI_TCR5:
|
|
case FSL_SAI_TFR:
|
|
case FSL_SAI_TMR:
|
|
case FSL_SAI_RCSR:
|
|
case FSL_SAI_RCR1:
|
|
case FSL_SAI_RCR2:
|
|
case FSL_SAI_RCR3:
|
|
case FSL_SAI_RCR4:
|
|
case FSL_SAI_RCR5:
|
|
case FSL_SAI_RDR:
|
|
case FSL_SAI_RFR:
|
|
case FSL_SAI_RMR:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static bool fsl_sai_volatile_reg(struct device *dev, unsigned int reg)
|
|
{
|
|
switch (reg) {
|
|
case FSL_SAI_TCSR:
|
|
case FSL_SAI_RCSR:
|
|
case FSL_SAI_TFR:
|
|
case FSL_SAI_RFR:
|
|
case FSL_SAI_RDR:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static bool fsl_sai_writeable_reg(struct device *dev, unsigned int reg)
|
|
{
|
|
switch (reg) {
|
|
case FSL_SAI_TCSR:
|
|
case FSL_SAI_TCR1:
|
|
case FSL_SAI_TCR2:
|
|
case FSL_SAI_TCR3:
|
|
case FSL_SAI_TCR4:
|
|
case FSL_SAI_TCR5:
|
|
case FSL_SAI_TDR:
|
|
case FSL_SAI_TMR:
|
|
case FSL_SAI_RCSR:
|
|
case FSL_SAI_RCR1:
|
|
case FSL_SAI_RCR2:
|
|
case FSL_SAI_RCR3:
|
|
case FSL_SAI_RCR4:
|
|
case FSL_SAI_RCR5:
|
|
case FSL_SAI_RMR:
|
|
return true;
|
|
default:
|
|
return false;
|
|
}
|
|
}
|
|
|
|
static const struct regmap_config fsl_sai_regmap_config = {
|
|
.reg_bits = 32,
|
|
.reg_stride = 4,
|
|
.val_bits = 32,
|
|
|
|
.max_register = FSL_SAI_RMR,
|
|
.reg_defaults = fsl_sai_reg_defaults,
|
|
.num_reg_defaults = ARRAY_SIZE(fsl_sai_reg_defaults),
|
|
.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_probe(struct platform_device *pdev)
|
|
{
|
|
struct device_node *np = pdev->dev.of_node;
|
|
struct fsl_sai *sai;
|
|
struct regmap *gpr;
|
|
struct resource *res;
|
|
void __iomem *base;
|
|
char tmp[8];
|
|
int irq, ret, i;
|
|
int index;
|
|
|
|
sai = devm_kzalloc(&pdev->dev, sizeof(*sai), GFP_KERNEL);
|
|
if (!sai)
|
|
return -ENOMEM;
|
|
|
|
sai->pdev = pdev;
|
|
|
|
if (of_device_is_compatible(np, "fsl,imx6sx-sai") ||
|
|
of_device_is_compatible(np, "fsl,imx6ul-sai"))
|
|
sai->sai_on_imx = true;
|
|
|
|
sai->is_lsb_first = of_property_read_bool(np, "lsb-first");
|
|
|
|
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
|
|
base = devm_ioremap_resource(&pdev->dev, res);
|
|
if (IS_ERR(base))
|
|
return PTR_ERR(base);
|
|
|
|
sai->regmap = devm_regmap_init_mmio_clk(&pdev->dev,
|
|
"bus", base, &fsl_sai_regmap_config);
|
|
|
|
/* Compatible with old DTB cases */
|
|
if (IS_ERR(sai->regmap))
|
|
sai->regmap = devm_regmap_init_mmio_clk(&pdev->dev,
|
|
"sai", base, &fsl_sai_regmap_config);
|
|
if (IS_ERR(sai->regmap)) {
|
|
dev_err(&pdev->dev, "regmap init failed\n");
|
|
return PTR_ERR(sai->regmap);
|
|
}
|
|
|
|
/* No error out for old DTB cases but only mark the clock NULL */
|
|
sai->bus_clk = devm_clk_get(&pdev->dev, "bus");
|
|
if (IS_ERR(sai->bus_clk)) {
|
|
dev_err(&pdev->dev, "failed to get bus clock: %ld\n",
|
|
PTR_ERR(sai->bus_clk));
|
|
sai->bus_clk = NULL;
|
|
}
|
|
|
|
sai->mclk_clk[0] = sai->bus_clk;
|
|
for (i = 1; i < FSL_SAI_MCLK_MAX; i++) {
|
|
sprintf(tmp, "mclk%d", i);
|
|
sai->mclk_clk[i] = devm_clk_get(&pdev->dev, tmp);
|
|
if (IS_ERR(sai->mclk_clk[i])) {
|
|
dev_err(&pdev->dev, "failed to get mclk%d clock: %ld\n",
|
|
i + 1, PTR_ERR(sai->mclk_clk[i]));
|
|
sai->mclk_clk[i] = NULL;
|
|
}
|
|
}
|
|
|
|
irq = platform_get_irq(pdev, 0);
|
|
if (irq < 0) {
|
|
dev_err(&pdev->dev, "no irq for node %s\n", pdev->name);
|
|
return irq;
|
|
}
|
|
|
|
ret = devm_request_irq(&pdev->dev, irq, fsl_sai_isr, 0, np->name, sai);
|
|
if (ret) {
|
|
dev_err(&pdev->dev, "failed to claim irq %u\n", irq);
|
|
return ret;
|
|
}
|
|
|
|
/* Sync Tx with Rx as default by following old DT binding */
|
|
sai->synchronous[RX] = true;
|
|
sai->synchronous[TX] = false;
|
|
fsl_sai_dai.symmetric_rates = 1;
|
|
fsl_sai_dai.symmetric_channels = 1;
|
|
fsl_sai_dai.symmetric_samplebits = 1;
|
|
|
|
if (of_find_property(np, "fsl,sai-synchronous-rx", NULL) &&
|
|
of_find_property(np, "fsl,sai-asynchronous", NULL)) {
|
|
/* error out if both synchronous and asynchronous are present */
|
|
dev_err(&pdev->dev, "invalid binding for synchronous mode\n");
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (of_find_property(np, "fsl,sai-synchronous-rx", NULL)) {
|
|
/* Sync Rx with Tx */
|
|
sai->synchronous[RX] = false;
|
|
sai->synchronous[TX] = true;
|
|
} else if (of_find_property(np, "fsl,sai-asynchronous", NULL)) {
|
|
/* Discard all settings for asynchronous mode */
|
|
sai->synchronous[RX] = false;
|
|
sai->synchronous[TX] = false;
|
|
fsl_sai_dai.symmetric_rates = 0;
|
|
fsl_sai_dai.symmetric_channels = 0;
|
|
fsl_sai_dai.symmetric_samplebits = 0;
|
|
}
|
|
|
|
if (of_find_property(np, "fsl,sai-mclk-direction-output", NULL) &&
|
|
of_device_is_compatible(np, "fsl,imx6ul-sai")) {
|
|
gpr = syscon_regmap_lookup_by_compatible("fsl,imx6ul-iomuxc-gpr");
|
|
if (IS_ERR(gpr)) {
|
|
dev_err(&pdev->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 = res->start + FSL_SAI_RDR;
|
|
sai->dma_params_tx.addr = res->start + FSL_SAI_TDR;
|
|
sai->dma_params_rx.maxburst = FSL_SAI_MAXBURST_RX;
|
|
sai->dma_params_tx.maxburst = FSL_SAI_MAXBURST_TX;
|
|
|
|
platform_set_drvdata(pdev, sai);
|
|
|
|
ret = devm_snd_soc_register_component(&pdev->dev, &fsl_component,
|
|
&fsl_sai_dai, 1);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (sai->sai_on_imx)
|
|
return imx_pcm_dma_init(pdev, IMX_SAI_DMABUF_SIZE);
|
|
else
|
|
return devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
|
|
}
|
|
|
|
static const struct of_device_id fsl_sai_ids[] = {
|
|
{ .compatible = "fsl,vf610-sai", },
|
|
{ .compatible = "fsl,imx6sx-sai", },
|
|
{ .compatible = "fsl,imx6ul-sai", },
|
|
{ /* sentinel */ }
|
|
};
|
|
MODULE_DEVICE_TABLE(of, fsl_sai_ids);
|
|
|
|
#ifdef CONFIG_PM_SLEEP
|
|
static int fsl_sai_suspend(struct device *dev)
|
|
{
|
|
struct fsl_sai *sai = dev_get_drvdata(dev);
|
|
|
|
regcache_cache_only(sai->regmap, true);
|
|
regcache_mark_dirty(sai->regmap);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int fsl_sai_resume(struct device *dev)
|
|
{
|
|
struct fsl_sai *sai = dev_get_drvdata(dev);
|
|
|
|
regcache_cache_only(sai->regmap, false);
|
|
regmap_write(sai->regmap, FSL_SAI_TCSR, FSL_SAI_CSR_SR);
|
|
regmap_write(sai->regmap, FSL_SAI_RCSR, FSL_SAI_CSR_SR);
|
|
usleep_range(1000, 2000);
|
|
regmap_write(sai->regmap, FSL_SAI_TCSR, 0);
|
|
regmap_write(sai->regmap, FSL_SAI_RCSR, 0);
|
|
return regcache_sync(sai->regmap);
|
|
}
|
|
#endif /* CONFIG_PM_SLEEP */
|
|
|
|
static const struct dev_pm_ops fsl_sai_pm_ops = {
|
|
SET_SYSTEM_SLEEP_PM_OPS(fsl_sai_suspend, fsl_sai_resume)
|
|
};
|
|
|
|
static struct platform_driver fsl_sai_driver = {
|
|
.probe = fsl_sai_probe,
|
|
.driver = {
|
|
.name = "fsl-sai",
|
|
.pm = &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");
|