mirror of
https://mirrors.bfsu.edu.cn/git/linux.git
synced 2024-11-16 16:54:20 +08:00
114bacc75c
Use devm_platform_get_and_ioremap_resource() to simplify code. Signed-off-by: Yang Yingliang <yangyingliang@huawei.com> Link: https://lore.kernel.org/r/20210617032900.600124-1-yangyingliang@huawei.com Signed-off-by: Mark Brown <broonie@kernel.org>
366 lines
8.8 KiB
C
366 lines
8.8 KiB
C
/*
|
|
* ALSA SoC SPDIF Out Audio Layer for spear processors
|
|
*
|
|
* Copyright (C) 2012 ST Microelectronics
|
|
* Vipin Kumar <vipin.kumar@st.com>
|
|
*
|
|
* This file is licensed under the terms of the GNU General Public
|
|
* License version 2. This program is licensed "as is" without any
|
|
* warranty of any kind, whether express or implied.
|
|
*/
|
|
|
|
#include <linux/clk.h>
|
|
#include <linux/delay.h>
|
|
#include <linux/device.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/init.h>
|
|
#include <linux/io.h>
|
|
#include <linux/ioport.h>
|
|
#include <linux/module.h>
|
|
#include <linux/platform_device.h>
|
|
#include <sound/dmaengine_pcm.h>
|
|
#include <sound/soc.h>
|
|
#include <sound/spear_dma.h>
|
|
#include <sound/spear_spdif.h>
|
|
#include "spdif_out_regs.h"
|
|
#include "spear_pcm.h"
|
|
|
|
struct spdif_out_params {
|
|
u32 rate;
|
|
u32 core_freq;
|
|
u32 mute;
|
|
};
|
|
|
|
struct spdif_out_dev {
|
|
struct clk *clk;
|
|
struct spear_dma_data dma_params;
|
|
struct spdif_out_params saved_params;
|
|
u32 running;
|
|
void __iomem *io_base;
|
|
struct snd_dmaengine_dai_dma_data dma_params_tx;
|
|
struct snd_dmaengine_pcm_config config;
|
|
};
|
|
|
|
static void spdif_out_configure(struct spdif_out_dev *host)
|
|
{
|
|
writel(SPDIF_OUT_RESET, host->io_base + SPDIF_OUT_SOFT_RST);
|
|
mdelay(1);
|
|
writel(readl(host->io_base + SPDIF_OUT_SOFT_RST) & ~SPDIF_OUT_RESET,
|
|
host->io_base + SPDIF_OUT_SOFT_RST);
|
|
|
|
writel(SPDIF_OUT_FDMA_TRIG_16 | SPDIF_OUT_MEMFMT_16_16 |
|
|
SPDIF_OUT_VALID_HW | SPDIF_OUT_USER_HW |
|
|
SPDIF_OUT_CHNLSTA_HW | SPDIF_OUT_PARITY_HW,
|
|
host->io_base + SPDIF_OUT_CFG);
|
|
|
|
writel(0x7F, host->io_base + SPDIF_OUT_INT_STA_CLR);
|
|
writel(0x7F, host->io_base + SPDIF_OUT_INT_EN_CLR);
|
|
}
|
|
|
|
static int spdif_out_startup(struct snd_pcm_substream *substream,
|
|
struct snd_soc_dai *cpu_dai)
|
|
{
|
|
struct spdif_out_dev *host = snd_soc_dai_get_drvdata(cpu_dai);
|
|
int ret;
|
|
|
|
if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
|
|
return -EINVAL;
|
|
|
|
ret = clk_enable(host->clk);
|
|
if (ret)
|
|
return ret;
|
|
|
|
host->running = true;
|
|
spdif_out_configure(host);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static void spdif_out_shutdown(struct snd_pcm_substream *substream,
|
|
struct snd_soc_dai *dai)
|
|
{
|
|
struct spdif_out_dev *host = snd_soc_dai_get_drvdata(dai);
|
|
|
|
if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
|
|
return;
|
|
|
|
clk_disable(host->clk);
|
|
host->running = false;
|
|
}
|
|
|
|
static void spdif_out_clock(struct spdif_out_dev *host, u32 core_freq,
|
|
u32 rate)
|
|
{
|
|
u32 divider, ctrl;
|
|
|
|
clk_set_rate(host->clk, core_freq);
|
|
divider = DIV_ROUND_CLOSEST(clk_get_rate(host->clk), (rate * 128));
|
|
|
|
ctrl = readl(host->io_base + SPDIF_OUT_CTRL);
|
|
ctrl &= ~SPDIF_DIVIDER_MASK;
|
|
ctrl |= (divider << SPDIF_DIVIDER_SHIFT) & SPDIF_DIVIDER_MASK;
|
|
writel(ctrl, host->io_base + SPDIF_OUT_CTRL);
|
|
}
|
|
|
|
static int spdif_out_hw_params(struct snd_pcm_substream *substream,
|
|
struct snd_pcm_hw_params *params,
|
|
struct snd_soc_dai *dai)
|
|
{
|
|
struct spdif_out_dev *host = snd_soc_dai_get_drvdata(dai);
|
|
u32 rate, core_freq;
|
|
|
|
if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
|
|
return -EINVAL;
|
|
|
|
rate = params_rate(params);
|
|
|
|
switch (rate) {
|
|
case 8000:
|
|
case 16000:
|
|
case 32000:
|
|
case 64000:
|
|
/*
|
|
* The clock is multiplied by 10 to bring it to feasible range
|
|
* of frequencies for sscg
|
|
*/
|
|
core_freq = 64000 * 128 * 10; /* 81.92 MHz */
|
|
break;
|
|
case 5512:
|
|
case 11025:
|
|
case 22050:
|
|
case 44100:
|
|
case 88200:
|
|
case 176400:
|
|
core_freq = 176400 * 128; /* 22.5792 MHz */
|
|
break;
|
|
case 48000:
|
|
case 96000:
|
|
case 192000:
|
|
default:
|
|
core_freq = 192000 * 128; /* 24.576 MHz */
|
|
break;
|
|
}
|
|
|
|
spdif_out_clock(host, core_freq, rate);
|
|
host->saved_params.core_freq = core_freq;
|
|
host->saved_params.rate = rate;
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int spdif_out_trigger(struct snd_pcm_substream *substream, int cmd,
|
|
struct snd_soc_dai *dai)
|
|
{
|
|
struct spdif_out_dev *host = snd_soc_dai_get_drvdata(dai);
|
|
u32 ctrl;
|
|
int ret = 0;
|
|
|
|
if (substream->stream != SNDRV_PCM_STREAM_PLAYBACK)
|
|
return -EINVAL;
|
|
|
|
switch (cmd) {
|
|
case SNDRV_PCM_TRIGGER_START:
|
|
case SNDRV_PCM_TRIGGER_RESUME:
|
|
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
|
|
ctrl = readl(host->io_base + SPDIF_OUT_CTRL);
|
|
ctrl &= ~SPDIF_OPMODE_MASK;
|
|
if (!host->saved_params.mute)
|
|
ctrl |= SPDIF_OPMODE_AUD_DATA |
|
|
SPDIF_STATE_NORMAL;
|
|
else
|
|
ctrl |= SPDIF_OPMODE_MUTE_PCM;
|
|
writel(ctrl, host->io_base + SPDIF_OUT_CTRL);
|
|
break;
|
|
|
|
case SNDRV_PCM_TRIGGER_STOP:
|
|
case SNDRV_PCM_TRIGGER_SUSPEND:
|
|
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
|
|
ctrl = readl(host->io_base + SPDIF_OUT_CTRL);
|
|
ctrl &= ~SPDIF_OPMODE_MASK;
|
|
ctrl |= SPDIF_OPMODE_OFF;
|
|
writel(ctrl, host->io_base + SPDIF_OUT_CTRL);
|
|
break;
|
|
|
|
default:
|
|
ret = -EINVAL;
|
|
break;
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
static int spdif_mute(struct snd_soc_dai *dai, int mute, int direction)
|
|
{
|
|
struct spdif_out_dev *host = snd_soc_dai_get_drvdata(dai);
|
|
u32 val;
|
|
|
|
host->saved_params.mute = mute;
|
|
val = readl(host->io_base + SPDIF_OUT_CTRL);
|
|
val &= ~SPDIF_OPMODE_MASK;
|
|
|
|
if (mute)
|
|
val |= SPDIF_OPMODE_MUTE_PCM;
|
|
else {
|
|
if (host->running)
|
|
val |= SPDIF_OPMODE_AUD_DATA | SPDIF_STATE_NORMAL;
|
|
else
|
|
val |= SPDIF_OPMODE_OFF;
|
|
}
|
|
|
|
writel(val, host->io_base + SPDIF_OUT_CTRL);
|
|
return 0;
|
|
}
|
|
|
|
static int spdif_mute_get(struct snd_kcontrol *kcontrol,
|
|
struct snd_ctl_elem_value *ucontrol)
|
|
{
|
|
struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
|
|
struct spdif_out_dev *host = snd_soc_dai_get_drvdata(cpu_dai);
|
|
|
|
ucontrol->value.integer.value[0] = host->saved_params.mute;
|
|
return 0;
|
|
}
|
|
|
|
static int spdif_mute_put(struct snd_kcontrol *kcontrol,
|
|
struct snd_ctl_elem_value *ucontrol)
|
|
{
|
|
struct snd_soc_dai *cpu_dai = snd_kcontrol_chip(kcontrol);
|
|
struct spdif_out_dev *host = snd_soc_dai_get_drvdata(cpu_dai);
|
|
|
|
if (host->saved_params.mute == ucontrol->value.integer.value[0])
|
|
return 0;
|
|
|
|
spdif_mute(cpu_dai, ucontrol->value.integer.value[0],
|
|
SNDRV_PCM_STREAM_PLAYBACK);
|
|
|
|
return 1;
|
|
}
|
|
static const struct snd_kcontrol_new spdif_out_controls[] = {
|
|
SOC_SINGLE_BOOL_EXT("IEC958 Playback Switch", 0,
|
|
spdif_mute_get, spdif_mute_put),
|
|
};
|
|
|
|
static int spdif_soc_dai_probe(struct snd_soc_dai *dai)
|
|
{
|
|
struct spdif_out_dev *host = snd_soc_dai_get_drvdata(dai);
|
|
|
|
host->dma_params_tx.filter_data = &host->dma_params;
|
|
dai->playback_dma_data = &host->dma_params_tx;
|
|
|
|
return snd_soc_add_dai_controls(dai, spdif_out_controls,
|
|
ARRAY_SIZE(spdif_out_controls));
|
|
}
|
|
|
|
static const struct snd_soc_dai_ops spdif_out_dai_ops = {
|
|
.mute_stream = spdif_mute,
|
|
.startup = spdif_out_startup,
|
|
.shutdown = spdif_out_shutdown,
|
|
.trigger = spdif_out_trigger,
|
|
.hw_params = spdif_out_hw_params,
|
|
.no_capture_mute = 1,
|
|
};
|
|
|
|
static struct snd_soc_dai_driver spdif_out_dai = {
|
|
.playback = {
|
|
.channels_min = 2,
|
|
.channels_max = 2,
|
|
.rates = (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
|
|
SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_96000 | \
|
|
SNDRV_PCM_RATE_192000),
|
|
.formats = SNDRV_PCM_FMTBIT_S16_LE,
|
|
},
|
|
.probe = spdif_soc_dai_probe,
|
|
.ops = &spdif_out_dai_ops,
|
|
};
|
|
|
|
static const struct snd_soc_component_driver spdif_out_component = {
|
|
.name = "spdif-out",
|
|
};
|
|
|
|
static int spdif_out_probe(struct platform_device *pdev)
|
|
{
|
|
struct spdif_out_dev *host;
|
|
struct spear_spdif_platform_data *pdata;
|
|
struct resource *res;
|
|
int ret;
|
|
|
|
host = devm_kzalloc(&pdev->dev, sizeof(*host), GFP_KERNEL);
|
|
if (!host)
|
|
return -ENOMEM;
|
|
|
|
host->io_base = devm_platform_get_and_ioremap_resource(pdev, 0, &res);
|
|
if (IS_ERR(host->io_base))
|
|
return PTR_ERR(host->io_base);
|
|
|
|
host->clk = devm_clk_get(&pdev->dev, NULL);
|
|
if (IS_ERR(host->clk))
|
|
return PTR_ERR(host->clk);
|
|
|
|
pdata = dev_get_platdata(&pdev->dev);
|
|
|
|
host->dma_params.data = pdata->dma_params;
|
|
host->dma_params.addr = res->start + SPDIF_OUT_FIFO_DATA;
|
|
host->dma_params.max_burst = 16;
|
|
host->dma_params.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
|
|
|
|
dev_set_drvdata(&pdev->dev, host);
|
|
|
|
ret = devm_snd_soc_register_component(&pdev->dev, &spdif_out_component,
|
|
&spdif_out_dai, 1);
|
|
if (ret)
|
|
return ret;
|
|
|
|
return devm_spear_pcm_platform_register(&pdev->dev, &host->config,
|
|
pdata->filter);
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int spdif_out_suspend(struct device *dev)
|
|
{
|
|
struct platform_device *pdev = to_platform_device(dev);
|
|
struct spdif_out_dev *host = dev_get_drvdata(&pdev->dev);
|
|
|
|
if (host->running)
|
|
clk_disable(host->clk);
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int spdif_out_resume(struct device *dev)
|
|
{
|
|
struct platform_device *pdev = to_platform_device(dev);
|
|
struct spdif_out_dev *host = dev_get_drvdata(&pdev->dev);
|
|
|
|
if (host->running) {
|
|
clk_enable(host->clk);
|
|
spdif_out_configure(host);
|
|
spdif_out_clock(host, host->saved_params.core_freq,
|
|
host->saved_params.rate);
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
static SIMPLE_DEV_PM_OPS(spdif_out_dev_pm_ops, spdif_out_suspend, \
|
|
spdif_out_resume);
|
|
|
|
#define SPDIF_OUT_DEV_PM_OPS (&spdif_out_dev_pm_ops)
|
|
|
|
#else
|
|
#define SPDIF_OUT_DEV_PM_OPS NULL
|
|
|
|
#endif
|
|
|
|
static struct platform_driver spdif_out_driver = {
|
|
.probe = spdif_out_probe,
|
|
.driver = {
|
|
.name = "spdif-out",
|
|
.pm = SPDIF_OUT_DEV_PM_OPS,
|
|
},
|
|
};
|
|
|
|
module_platform_driver(spdif_out_driver);
|
|
|
|
MODULE_AUTHOR("Vipin Kumar <vipin.kumar@st.com>");
|
|
MODULE_DESCRIPTION("SPEAr SPDIF OUT SoC Interface");
|
|
MODULE_LICENSE("GPL");
|
|
MODULE_ALIAS("platform:spdif_out");
|