linux/sound/soc/pxa/mmp-sspa.c
Wei Yongjun 185457632b
ASoC: mmp-sspa: Fix return value check in asoc_mmp_sspa_probe()
In case of error, the function devm_ioremap() returns NULL pointer not
ERR_PTR(). The IS_ERR() test in the return value check should be
replaced with NULL test.

Signed-off-by: Wei Yongjun <weiyongjun1@huawei.com>
Link: https://lore.kernel.org/r/20200527030210.124393-1-weiyongjun1@huawei.com
Signed-off-by: Mark Brown <broonie@kernel.org>
2020-05-27 14:48:56 +01:00

583 lines
13 KiB
C

// SPDX-License-Identifier: GPL-2.0-or-later
/*
* linux/sound/soc/pxa/mmp-sspa.c
* Base on pxa2xx-ssp.c
*
* Copyright (C) 2011 Marvell International Ltd.
*/
#include <linux/init.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/delay.h>
#include <linux/clk.h>
#include <linux/slab.h>
#include <linux/io.h>
#include <linux/dmaengine.h>
#include <linux/pm_runtime.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/initval.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/pxa2xx-lib.h>
#include <sound/dmaengine_pcm.h>
#include "mmp-sspa.h"
/*
* SSPA audio private data
*/
struct sspa_priv {
void __iomem *tx_base;
void __iomem *rx_base;
struct snd_dmaengine_dai_dma_data playback_dma_data;
struct snd_dmaengine_dai_dma_data capture_dma_data;
struct clk *clk;
struct clk *audio_clk;
struct clk *sysclk;
int running_cnt;
u32 sp;
u32 ctrl;
};
static void mmp_sspa_tx_enable(struct sspa_priv *sspa)
{
unsigned int sspa_sp = sspa->sp;
sspa_sp &= ~SSPA_SP_MSL;
sspa_sp |= SSPA_SP_S_EN;
sspa_sp |= SSPA_SP_WEN;
__raw_writel(sspa_sp, sspa->tx_base + SSPA_SP);
}
static void mmp_sspa_tx_disable(struct sspa_priv *sspa)
{
unsigned int sspa_sp = sspa->sp;
sspa_sp &= ~SSPA_SP_MSL;
sspa_sp &= ~SSPA_SP_S_EN;
sspa_sp |= SSPA_SP_WEN;
__raw_writel(sspa_sp, sspa->tx_base + SSPA_SP);
}
static void mmp_sspa_rx_enable(struct sspa_priv *sspa)
{
unsigned int sspa_sp = sspa->sp;
sspa_sp |= SSPA_SP_S_EN;
sspa_sp |= SSPA_SP_WEN;
__raw_writel(sspa_sp, sspa->rx_base + SSPA_SP);
}
static void mmp_sspa_rx_disable(struct sspa_priv *sspa)
{
unsigned int sspa_sp = sspa->sp;
sspa_sp &= ~SSPA_SP_S_EN;
sspa_sp |= SSPA_SP_WEN;
__raw_writel(sspa_sp, sspa->rx_base + SSPA_SP);
}
static int mmp_sspa_startup(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct sspa_priv *sspa = snd_soc_dai_get_drvdata(dai);
clk_prepare_enable(sspa->sysclk);
clk_prepare_enable(sspa->clk);
return 0;
}
static void mmp_sspa_shutdown(struct snd_pcm_substream *substream,
struct snd_soc_dai *dai)
{
struct sspa_priv *sspa = snd_soc_dai_get_drvdata(dai);
clk_disable_unprepare(sspa->clk);
clk_disable_unprepare(sspa->sysclk);
}
/*
* Set the SSP ports SYSCLK.
*/
static int mmp_sspa_set_dai_sysclk(struct snd_soc_dai *cpu_dai,
int clk_id, unsigned int freq, int dir)
{
struct sspa_priv *sspa = snd_soc_dai_get_drvdata(cpu_dai);
struct device *dev = cpu_dai->component->dev;
int ret = 0;
if (dev->of_node)
return -ENOTSUPP;
switch (clk_id) {
case MMP_SSPA_CLK_AUDIO:
ret = clk_set_rate(sspa->audio_clk, freq);
if (ret)
return ret;
break;
case MMP_SSPA_CLK_PLL:
case MMP_SSPA_CLK_VCXO:
/* not support yet */
return -EINVAL;
default:
return -EINVAL;
}
return 0;
}
static int mmp_sspa_set_dai_pll(struct snd_soc_dai *cpu_dai, int pll_id,
int source, unsigned int freq_in,
unsigned int freq_out)
{
struct sspa_priv *sspa = snd_soc_dai_get_drvdata(cpu_dai);
struct device *dev = cpu_dai->component->dev;
int ret = 0;
if (dev->of_node)
return -ENOTSUPP;
switch (pll_id) {
case MMP_SYSCLK:
ret = clk_set_rate(sspa->sysclk, freq_out);
if (ret)
return ret;
break;
case MMP_SSPA_CLK:
ret = clk_set_rate(sspa->clk, freq_out);
if (ret)
return ret;
break;
default:
return -ENODEV;
}
return 0;
}
/*
* Set up the sspa dai format.
*/
static int mmp_sspa_set_dai_fmt(struct snd_soc_dai *cpu_dai,
unsigned int fmt)
{
struct sspa_priv *sspa = snd_soc_dai_get_drvdata(cpu_dai);
/* reset port settings */
sspa->sp = SSPA_SP_WEN | SSPA_SP_S_RST | SSPA_SP_FFLUSH;
sspa->ctrl = 0;
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBS_CFS:
sspa->sp |= SSPA_SP_MSL;
break;
case SND_SOC_DAIFMT_CBM_CFM:
break;
default:
return -EINVAL;
}
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_NB_NF:
sspa->sp |= SSPA_SP_FSP;
break;
default:
return -EINVAL;
}
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
sspa->ctrl |= SSPA_CTL_XDATDLY(1);
break;
default:
return -EINVAL;
}
/* Since we are configuring the timings for the format by hand
* we have to defer some things until hw_params() where we
* know parameters like the sample size.
*/
return 0;
}
/*
* Set the SSPA audio DMA parameters and sample size.
* Can be called multiple times by oss emulation.
*/
static int mmp_sspa_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct sspa_priv *sspa = snd_soc_dai_get_drvdata(dai);
struct device *dev = dai->component->dev;
u32 sspa_ctrl = sspa->ctrl;
int bits;
int bitval;
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S8:
bits = 8;
bitval = SSPA_CTL_8_BITS;
break;
case SNDRV_PCM_FORMAT_S16_LE:
bits = 16;
bitval = SSPA_CTL_16_BITS;
break;
case SNDRV_PCM_FORMAT_S24_3LE:
bits = 24;
bitval = SSPA_CTL_24_BITS;
break;
case SNDRV_PCM_FORMAT_S32_LE:
bits = 32;
bitval = SSPA_CTL_32_BITS;
break;
default:
return -EINVAL;
}
if (dev->of_node || params_channels(params) == 2)
sspa_ctrl |= SSPA_CTL_XPH;
sspa_ctrl &= ~SSPA_CTL_XWDLEN1_MASK;
sspa_ctrl |= SSPA_CTL_XWDLEN1(bitval);
sspa_ctrl &= ~SSPA_CTL_XSSZ1_MASK;
sspa_ctrl |= SSPA_CTL_XSSZ1(bitval);
sspa_ctrl &= ~SSPA_CTL_XSSZ2_MASK;
sspa_ctrl |= SSPA_CTL_XSSZ2(bitval);
sspa->sp &= ~SSPA_SP_FWID_MASK;
sspa->sp |= SSPA_SP_FWID(bits - 1);
sspa->sp &= ~SSPA_TXSP_FPER_MASK;
sspa->sp |= SSPA_TXSP_FPER(bits * 2 - 1);
if (dev->of_node) {
clk_set_rate(sspa->clk, params_rate(params) *
params_channels(params) * bits);
}
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
__raw_writel(sspa_ctrl, sspa->tx_base + SSPA_CTL);
__raw_writel(0x1, sspa->tx_base + SSPA_FIFO_UL);
} else {
__raw_writel(sspa_ctrl, sspa->rx_base + SSPA_CTL);
__raw_writel(0x0, sspa->rx_base + SSPA_FIFO_UL);
}
return 0;
}
static int mmp_sspa_trigger(struct snd_pcm_substream *substream, int cmd,
struct snd_soc_dai *dai)
{
struct sspa_priv *sspa = snd_soc_dai_get_drvdata(dai);
int ret = 0;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
/*
* whatever playback or capture, must enable rx.
* this is a hw issue, so need check if rx has been
* enabled or not; if has been enabled by another
* stream, do not enable again.
*/
if (!sspa->running_cnt)
mmp_sspa_rx_enable(sspa);
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
mmp_sspa_tx_enable(sspa);
sspa->running_cnt++;
break;
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
sspa->running_cnt--;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
mmp_sspa_tx_disable(sspa);
/* have no capture stream, disable rx port */
if (!sspa->running_cnt)
mmp_sspa_rx_disable(sspa);
break;
default:
ret = -EINVAL;
}
return ret;
}
static int mmp_sspa_probe(struct snd_soc_dai *dai)
{
struct sspa_priv *sspa = dev_get_drvdata(dai->dev);
snd_soc_dai_init_dma_data(dai,
&sspa->playback_dma_data,
&sspa->capture_dma_data);
snd_soc_dai_set_drvdata(dai, sspa);
return 0;
}
#define MMP_SSPA_RATES SNDRV_PCM_RATE_8000_192000
#define MMP_SSPA_FORMATS (SNDRV_PCM_FMTBIT_S8 | \
SNDRV_PCM_FMTBIT_S16_LE | \
SNDRV_PCM_FMTBIT_S24_3LE | \
SNDRV_PCM_FMTBIT_S32_LE)
static const struct snd_soc_dai_ops mmp_sspa_dai_ops = {
.startup = mmp_sspa_startup,
.shutdown = mmp_sspa_shutdown,
.trigger = mmp_sspa_trigger,
.hw_params = mmp_sspa_hw_params,
.set_sysclk = mmp_sspa_set_dai_sysclk,
.set_pll = mmp_sspa_set_dai_pll,
.set_fmt = mmp_sspa_set_dai_fmt,
};
static struct snd_soc_dai_driver mmp_sspa_dai = {
.probe = mmp_sspa_probe,
.playback = {
.channels_min = 1,
.channels_max = 128,
.rates = MMP_SSPA_RATES,
.formats = MMP_SSPA_FORMATS,
},
.capture = {
.channels_min = 1,
.channels_max = 2,
.rates = MMP_SSPA_RATES,
.formats = MMP_SSPA_FORMATS,
},
.ops = &mmp_sspa_dai_ops,
};
#define MMP_PCM_INFO (SNDRV_PCM_INFO_MMAP | \
SNDRV_PCM_INFO_MMAP_VALID | \
SNDRV_PCM_INFO_INTERLEAVED | \
SNDRV_PCM_INFO_PAUSE | \
SNDRV_PCM_INFO_RESUME | \
SNDRV_PCM_INFO_NO_PERIOD_WAKEUP)
static const struct snd_pcm_hardware mmp_pcm_hardware[] = {
{
.info = MMP_PCM_INFO,
.period_bytes_min = 1024,
.period_bytes_max = 2048,
.periods_min = 2,
.periods_max = 32,
.buffer_bytes_max = 4096,
.fifo_size = 32,
},
{
.info = MMP_PCM_INFO,
.period_bytes_min = 1024,
.period_bytes_max = 2048,
.periods_min = 2,
.periods_max = 32,
.buffer_bytes_max = 4096,
.fifo_size = 32,
},
};
static const struct snd_dmaengine_pcm_config mmp_pcm_config = {
.prepare_slave_config = snd_dmaengine_pcm_prepare_slave_config,
.pcm_hardware = mmp_pcm_hardware,
.prealloc_buffer_size = 4096,
};
static int mmp_pcm_mmap(struct snd_soc_component *component,
struct snd_pcm_substream *substream,
struct vm_area_struct *vma)
{
vma->vm_flags |= VM_DONTEXPAND | VM_DONTDUMP;
vma->vm_page_prot = pgprot_noncached(vma->vm_page_prot);
return remap_pfn_range(vma, vma->vm_start,
substream->dma_buffer.addr >> PAGE_SHIFT,
vma->vm_end - vma->vm_start, vma->vm_page_prot);
}
static int mmp_sspa_open(struct snd_soc_component *component,
struct snd_pcm_substream *substream)
{
struct sspa_priv *sspa = snd_soc_component_get_drvdata(component);
pm_runtime_get_sync(component->dev);
/* we can only change the settings if the port is not in use */
if ((__raw_readl(sspa->tx_base + SSPA_SP) & SSPA_SP_S_EN) ||
(__raw_readl(sspa->rx_base + SSPA_SP) & SSPA_SP_S_EN)) {
dev_err(component->dev,
"can't change hardware dai format: stream is in use\n");
return -EBUSY;
}
__raw_writel(sspa->sp, sspa->tx_base + SSPA_SP);
__raw_writel(sspa->sp, sspa->rx_base + SSPA_SP);
sspa->sp &= ~(SSPA_SP_S_RST | SSPA_SP_FFLUSH);
__raw_writel(sspa->sp, sspa->tx_base + SSPA_SP);
__raw_writel(sspa->sp, sspa->rx_base + SSPA_SP);
/*
* FIXME: hw issue, for the tx serial port,
* can not config the master/slave mode;
* so must clean this bit.
* The master/slave mode has been set in the
* rx port.
*/
__raw_writel(sspa->sp & ~SSPA_SP_MSL, sspa->tx_base + SSPA_SP);
__raw_writel(sspa->ctrl, sspa->tx_base + SSPA_CTL);
__raw_writel(sspa->ctrl, sspa->rx_base + SSPA_CTL);
return 0;
}
static int mmp_sspa_close(struct snd_soc_component *component,
struct snd_pcm_substream *substream)
{
pm_runtime_put_sync(component->dev);
return 0;
}
static const struct snd_soc_component_driver mmp_sspa_component = {
.name = "mmp-sspa",
.mmap = mmp_pcm_mmap,
.open = mmp_sspa_open,
.close = mmp_sspa_close,
};
static int asoc_mmp_sspa_probe(struct platform_device *pdev)
{
struct sspa_priv *sspa;
int ret;
sspa = devm_kzalloc(&pdev->dev,
sizeof(struct sspa_priv), GFP_KERNEL);
if (!sspa)
return -ENOMEM;
if (pdev->dev.of_node) {
sspa->rx_base = devm_platform_ioremap_resource(pdev, 0);
if (IS_ERR(sspa->rx_base))
return PTR_ERR(sspa->rx_base);
sspa->tx_base = devm_platform_ioremap_resource(pdev, 1);
if (IS_ERR(sspa->tx_base))
return PTR_ERR(sspa->tx_base);
sspa->clk = devm_clk_get(&pdev->dev, "bitclk");
if (IS_ERR(sspa->clk))
return PTR_ERR(sspa->clk);
sspa->audio_clk = devm_clk_get(&pdev->dev, "audio");
if (IS_ERR(sspa->audio_clk))
return PTR_ERR(sspa->audio_clk);
} else {
struct resource *res;
res = platform_get_resource(pdev, IORESOURCE_IO, 0);
if (res == NULL)
return -ENODEV;
sspa->rx_base = devm_ioremap(&pdev->dev, res->start, 0x30);
if (!sspa->rx_base)
return -ENOMEM;
sspa->tx_base = devm_ioremap(&pdev->dev,
res->start + 0x80, 0x30);
if (!sspa->tx_base)
return -ENOMEM;
sspa->clk = devm_clk_get(&pdev->dev, NULL);
if (IS_ERR(sspa->clk))
return PTR_ERR(sspa->clk);
sspa->audio_clk = clk_get(NULL, "mmp-audio");
if (IS_ERR(sspa->audio_clk))
return PTR_ERR(sspa->audio_clk);
sspa->sysclk = clk_get(NULL, "mmp-sysclk");
if (IS_ERR(sspa->sysclk)) {
clk_put(sspa->audio_clk);
return PTR_ERR(sspa->sysclk);
}
}
platform_set_drvdata(pdev, sspa);
sspa->playback_dma_data.maxburst = 4;
sspa->capture_dma_data.maxburst = 4;
/* You know, these addresses are actually ignored. */
sspa->capture_dma_data.addr = SSPA_D;
sspa->playback_dma_data.addr = 0x80 + SSPA_D;
if (pdev->dev.of_node) {
ret = devm_snd_dmaengine_pcm_register(&pdev->dev,
&mmp_pcm_config, 0);
if (ret)
return ret;
}
ret = devm_snd_soc_register_component(&pdev->dev, &mmp_sspa_component,
&mmp_sspa_dai, 1);
if (ret)
return ret;
pm_runtime_enable(&pdev->dev);
clk_prepare_enable(sspa->audio_clk);
return 0;
}
static int asoc_mmp_sspa_remove(struct platform_device *pdev)
{
struct sspa_priv *sspa = platform_get_drvdata(pdev);
clk_disable_unprepare(sspa->audio_clk);
pm_runtime_disable(&pdev->dev);
if (pdev->dev.of_node)
return 0;
clk_put(sspa->audio_clk);
clk_put(sspa->sysclk);
return 0;
}
#ifdef CONFIG_OF
static const struct of_device_id mmp_sspa_of_match[] = {
{ .compatible = "marvell,mmp-sspa" },
{},
};
MODULE_DEVICE_TABLE(of, mmp_sspa_of_match);
#endif
static struct platform_driver asoc_mmp_sspa_driver = {
.driver = {
.name = "mmp-sspa-dai",
.of_match_table = of_match_ptr(mmp_sspa_of_match),
},
.probe = asoc_mmp_sspa_probe,
.remove = asoc_mmp_sspa_remove,
};
module_platform_driver(asoc_mmp_sspa_driver);
MODULE_AUTHOR("Leo Yan <leoy@marvell.com>");
MODULE_DESCRIPTION("MMP SSPA SoC Interface");
MODULE_LICENSE("GPL");
MODULE_ALIAS("platform:mmp-sspa-dai");