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ASoC: rockchip: Add rockchip SPDIF transceiver driver 

Add a driver for the SPDIF transceiver available on RK3066, RK3188 and
RK3288. Heavily based on the rockchip i2s driver.

Signed-off-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Sjoerd Simons 2015-10-08 15:31:13 +02:00 committed by Mark Brown
parent 51e5084e71
commit f874b80e15
4 changed files with 482 additions and 0 deletions
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8
sound/soc/rockchip/Kconfig
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@ -15,6 +15,14 @@ config SND_SOC_ROCKCHIP_I2S
Rockchip I2S device. The device supports upto maximum of
8 channels each for play and record.
config SND_SOC_ROCKCHIP_SPDIF
tristate "Rockchip SPDIF Device Driver"
depends on CLKDEV_LOOKUP && SND_SOC_ROCKCHIP
select SND_SOC_GENERIC_DMAENGINE_PCM
help
Say Y or M if you want to add support for SPDIF driver for
Rockchip SPDIF transceiver device.
config SND_SOC_ROCKCHIP_MAX98090
tristate "ASoC support for Rockchip boards using a MAX98090 codec"
depends on SND_SOC_ROCKCHIP && I2C && GPIOLIB && CLKDEV_LOOKUP

2
sound/soc/rockchip/Makefile
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@ -1,7 +1,9 @@
# ROCKCHIP Platform Support
snd-soc-rockchip-i2s-objs := rockchip_i2s.o
snd-soc-rockchip-spdif-objs := rockchip_spdif.o
obj-$(CONFIG_SND_SOC_ROCKCHIP_I2S) += snd-soc-rockchip-i2s.o
obj-$(CONFIG_SND_SOC_ROCKCHIP_SPDIF) += snd-soc-rockchip-spdif.o
snd-soc-rockchip-max98090-objs := rockchip_max98090.o
snd-soc-rockchip-rt5645-objs := rockchip_rt5645.o

409
sound/soc/rockchip/rockchip_spdif.c Normal file
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@ -0,0 +1,409 @@
/* sound/soc/rockchip/rk_spdif.c
*
* ALSA SoC Audio Layer - Rockchip I2S Controller driver
*
* Copyright (c) 2014 Rockchip Electronics Co. Ltd.
* Author: Jianqun <jay.xu@rock-chips.com>
* Copyright (c) 2015 Collabora Ltd.
* Author: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/of_gpio.h>
#include <linux/clk.h>
#include <linux/pm_runtime.h>
#include <linux/mfd/syscon.h>
#include <linux/regmap.h>
#include <sound/pcm_params.h>
#include <sound/dmaengine_pcm.h>
#include "rockchip_spdif.h"
enum rk_spdif_type {
RK_SPDIF_RK3066,
RK_SPDIF_RK3188,
RK_SPDIF_RK3288,
};
#define RK3288_GRF_SOC_CON2 0x24c
struct rk_spdif_dev {
struct device *dev;
struct clk *mclk;
struct clk *hclk;
struct snd_dmaengine_dai_dma_data playback_dma_data;
struct regmap *regmap;
};
static const struct of_device_id rk_spdif_match[] = {
{ .compatible = "rockchip,rk3066-spdif",
.data = (void *) RK_SPDIF_RK3066 },
{ .compatible = "rockchip,rk3188-spdif",
.data = (void *) RK_SPDIF_RK3188 },
{ .compatible = "rockchip,rk3288-spdif",
.data = (void *) RK_SPDIF_RK3288 },
{},
};
MODULE_DEVICE_TABLE(of, rk_spdif_match);
static int rk_spdif_runtime_suspend(struct device *dev)
{
struct rk_spdif_dev *spdif = dev_get_drvdata(dev);
clk_disable_unprepare(spdif->mclk);
clk_disable_unprepare(spdif->hclk);
return 0;
}
static int rk_spdif_runtime_resume(struct device *dev)
{
struct rk_spdif_dev *spdif = dev_get_drvdata(dev);
int ret;
ret = clk_prepare_enable(spdif->mclk);
if (ret) {
dev_err(spdif->dev, "mclk clock enable failed %d\n", ret);
return ret;
}
ret = clk_prepare_enable(spdif->hclk);
if (ret) {
dev_err(spdif->dev, "hclk clock enable failed %d\n", ret);
return ret;
}
return 0;
}
static int rk_spdif_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct rk_spdif_dev *spdif = snd_soc_dai_get_drvdata(dai);
unsigned int val = SPDIF_CFGR_HALFWORD_ENABLE;
int srate, mclk;
int ret;
srate = params_rate(params);
switch (srate) {
case 32000:
case 48000:
case 96000:
mclk = 96000 * 128; /* 12288000 hz */
break;
case 44100:
mclk = 44100 * 256; /* 11289600 hz */
break;
case 192000:
mclk = 192000 * 128; /* 24576000 hz */
break;
default:
return -EINVAL;
}
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S16_LE:
val |= SPDIF_CFGR_VDW_16;
break;
case SNDRV_PCM_FORMAT_S20_3LE:
val |= SPDIF_CFGR_VDW_20;
break;
case SNDRV_PCM_FORMAT_S24_LE:
val |= SPDIF_CFGR_VDW_24;
break;
default:
return -EINVAL;
}
/* Set clock and calculate divider */
ret = clk_set_rate(spdif->mclk, mclk);
if (ret != 0) {
dev_err(spdif->dev, "Failed to set module clock rate: %d\n",
ret);
return ret;
}
val |= SPDIF_CFGR_CLK_DIV(mclk/(srate * 256));
ret = regmap_update_bits(spdif->regmap, SPDIF_CFGR,
SPDIF_CFGR_CLK_DIV_MASK | SPDIF_CFGR_HALFWORD_ENABLE |
SDPIF_CFGR_VDW_MASK,
val);
return ret;
}
static int rk_spdif_trigger(struct snd_pcm_substream *substream,
int cmd, struct snd_soc_dai *dai)
{
struct rk_spdif_dev *spdif = snd_soc_dai_get_drvdata(dai);
int ret;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
ret = regmap_update_bits(spdif->regmap, SPDIF_DMACR,
SPDIF_DMACR_TDE_ENABLE,
SPDIF_DMACR_TDE_ENABLE);
if (ret != 0)
return ret;
ret = regmap_update_bits(spdif->regmap, SPDIF_XFER,
SPDIF_XFER_TXS_START,
SPDIF_XFER_TXS_START);
break;
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
ret = regmap_update_bits(spdif->regmap, SPDIF_DMACR,
SPDIF_DMACR_TDE_ENABLE,
SPDIF_DMACR_TDE_DISABLE);
if (ret != 0)
return ret;
ret = regmap_update_bits(spdif->regmap, SPDIF_XFER,
SPDIF_XFER_TXS_START,
SPDIF_XFER_TXS_STOP);
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
static int rk_spdif_dai_probe(struct snd_soc_dai *dai)
{
struct rk_spdif_dev *spdif = snd_soc_dai_get_drvdata(dai);
dai->playback_dma_data = &spdif->playback_dma_data;
return 0;
}
static const struct snd_soc_dai_ops rk_spdif_dai_ops = {
.hw_params = rk_spdif_hw_params,
.trigger = rk_spdif_trigger,
};
static struct snd_soc_dai_driver rk_spdif_dai = {
.probe = rk_spdif_dai_probe,
.playback = {
.stream_name = "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 |
SNDRV_PCM_FMTBIT_S20_3LE |
SNDRV_PCM_FMTBIT_S24_LE),
},
.ops = &rk_spdif_dai_ops,
};
static const struct snd_soc_component_driver rk_spdif_component = {
.name = "rockchip-spdif",
};
static bool rk_spdif_wr_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case SPDIF_CFGR:
case SPDIF_DMACR:
case SPDIF_INTCR:
case SPDIF_XFER:
case SPDIF_SMPDR:
return true;
default:
return false;
}
}
static bool rk_spdif_rd_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case SPDIF_CFGR:
case SPDIF_SDBLR:
case SPDIF_INTCR:
case SPDIF_INTSR:
case SPDIF_XFER:
return true;
default:
return false;
}
}
static bool rk_spdif_volatile_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case SPDIF_INTSR:
case SPDIF_SDBLR:
return true;
default:
return false;
}
}
static const struct regmap_config rk_spdif_regmap_config = {
.reg_bits = 32,
.reg_stride = 4,
.val_bits = 32,
.max_register = SPDIF_SMPDR,
.writeable_reg = rk_spdif_wr_reg,
.readable_reg = rk_spdif_rd_reg,
.volatile_reg = rk_spdif_volatile_reg,
.cache_type = REGCACHE_FLAT,
};
static int rk_spdif_probe(struct platform_device *pdev)
{
struct device_node *np = pdev->dev.of_node;
struct rk_spdif_dev *spdif;
const struct of_device_id *match;
struct resource *res;
void __iomem *regs;
int ret;
match = of_match_node(rk_spdif_match, np);
if ((int) match->data == RK_SPDIF_RK3288) {
struct regmap *grf;
grf = syscon_regmap_lookup_by_phandle(np, "rockchip,grf");
if (IS_ERR(grf)) {
dev_err(&pdev->dev,
"rockchip_spdif missing 'rockchip,grf' \n");
return PTR_ERR(grf);
}
/* Select the 8 channel SPDIF solution on RK3288 as
* the 2 channel one does not appear to work
*/
regmap_write(grf, RK3288_GRF_SOC_CON2, BIT(1) << 16);
}
spdif = devm_kzalloc(&pdev->dev, sizeof(*spdif), GFP_KERNEL);
if (!spdif)
return -ENOMEM;
spdif->hclk = devm_clk_get(&pdev->dev, "hclk");
if (IS_ERR(spdif->hclk)) {
dev_err(&pdev->dev, "Can't retrieve rk_spdif bus clock\n");
return PTR_ERR(spdif->hclk);
}
ret = clk_prepare_enable(spdif->hclk);
if (ret) {
dev_err(spdif->dev, "hclock enable failed %d\n", ret);
return ret;
}
spdif->mclk = devm_clk_get(&pdev->dev, "mclk");
if (IS_ERR(spdif->mclk)) {
dev_err(&pdev->dev, "Can't retrieve rk_spdif master clock\n");
return PTR_ERR(spdif->mclk);
}
ret = clk_prepare_enable(spdif->mclk);
if (ret) {
dev_err(spdif->dev, "clock enable failed %d\n", ret);
return ret;
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
regs = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(regs))
return PTR_ERR(regs);
spdif->regmap = devm_regmap_init_mmio_clk(&pdev->dev, "hclk", regs,
&rk_spdif_regmap_config);
if (IS_ERR(spdif->regmap)) {
dev_err(&pdev->dev,
"Failed to initialise managed register map\n");
return PTR_ERR(spdif->regmap);
}
spdif->playback_dma_data.addr = res->start + SPDIF_SMPDR;
spdif->playback_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
spdif->playback_dma_data.maxburst = 4;
spdif->dev = &pdev->dev;
dev_set_drvdata(&pdev->dev, spdif);
pm_runtime_set_active(&pdev->dev);
pm_runtime_enable(&pdev->dev);
pm_request_idle(&pdev->dev);
ret = devm_snd_soc_register_component(&pdev->dev,
&rk_spdif_component,
&rk_spdif_dai, 1);
if (ret) {
dev_err(&pdev->dev, "Could not register DAI\n");
goto err_pm_runtime;
}
ret = snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
if (ret) {
dev_err(&pdev->dev, "Could not register PCM\n");
goto err_pcm_register;
}
return 0;
err_pcm_register:
snd_dmaengine_pcm_unregister(&pdev->dev);
err_pm_runtime:
pm_runtime_disable(&pdev->dev);
return ret;
}
static int rk_spdif_remove(struct platform_device *pdev)
{
struct rk_spdif_dev *spdif = dev_get_drvdata(&pdev->dev);
pm_runtime_disable(&pdev->dev);
if (!pm_runtime_status_suspended(&pdev->dev))
rk_spdif_runtime_suspend(&pdev->dev);
clk_disable_unprepare(spdif->mclk);
clk_disable_unprepare(spdif->hclk);
snd_dmaengine_pcm_unregister(&pdev->dev);
snd_soc_unregister_component(&pdev->dev);
return 0;
}
static const struct dev_pm_ops rk_spdif_pm_ops = {
SET_RUNTIME_PM_OPS(rk_spdif_runtime_suspend, rk_spdif_runtime_resume,
NULL)
};
static struct platform_driver rk_spdif_driver = {
.probe = rk_spdif_probe,
.remove = rk_spdif_remove,
.driver = {
.name = "rockchip-spdif",
.of_match_table = of_match_ptr(rk_spdif_match),
.pm = &rk_spdif_pm_ops,
},
};
module_platform_driver(rk_spdif_driver);
MODULE_ALIAS("platform:rockchip-spdif");
MODULE_DESCRIPTION("ROCKCHIP SPDIF transceiver Interface");
MODULE_AUTHOR("Sjoerd Simons <sjoerd.simons@collabora.co.uk>");
MODULE_LICENSE("GPL v2");

63
sound/soc/rockchip/rockchip_spdif.h Normal file
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@ -0,0 +1,63 @@
/*
* ALSA SoC Audio Layer - Rockchip SPDIF transceiver driver
*
* Copyright (c) 2015 Collabora Ltd.
* Author: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#ifndef _ROCKCHIP_SPDIF_H
#define _ROCKCHIP_SPDIF_H
/*
* CFGR
* transfer configuration register
*/
#define SPDIF_CFGR_CLK_DIV_SHIFT (16)
#define SPDIF_CFGR_CLK_DIV_MASK (0xff << SPDIF_CFGR_CLK_DIV_SHIFT)
#define SPDIF_CFGR_CLK_DIV(x) (x << SPDIF_CFGR_CLK_DIV_SHIFT)
#define SPDIF_CFGR_HALFWORD_SHIFT 2
#define SPDIF_CFGR_HALFWORD_DISABLE (0 << SPDIF_CFGR_HALFWORD_SHIFT)
#define SPDIF_CFGR_HALFWORD_ENABLE (1 << SPDIF_CFGR_HALFWORD_SHIFT)
#define SPDIF_CFGR_VDW_SHIFT 0
#define SPDIF_CFGR_VDW(x) (x << SPDIF_CFGR_VDW_SHIFT)
#define SDPIF_CFGR_VDW_MASK (0xf << SPDIF_CFGR_VDW_SHIFT)
#define SPDIF_CFGR_VDW_16 SPDIF_CFGR_VDW(0x00)
#define SPDIF_CFGR_VDW_20 SPDIF_CFGR_VDW(0x01)
#define SPDIF_CFGR_VDW_24 SPDIF_CFGR_VDW(0x10)
/*
* DMACR
* DMA control register
*/
#define SPDIF_DMACR_TDE_SHIFT 5
#define SPDIF_DMACR_TDE_DISABLE (0 << SPDIF_DMACR_TDE_SHIFT)
#define SPDIF_DMACR_TDE_ENABLE (1 << SPDIF_DMACR_TDE_SHIFT)
#define SPDIF_DMACR_TDL_SHIFT 0
#define SPDIF_DMACR_TDL(x) ((x) << SPDIF_DMACR_TDL_SHIFT)
#define SPDIF_DMACR_TDL_MASK (0x1f << SDPIF_DMACR_TDL_SHIFT)
/*
* XFER
* Transfer control register
*/
#define SPDIF_XFER_TXS_SHIFT 0
#define SPDIF_XFER_TXS_STOP (0 << SPDIF_XFER_TXS_SHIFT)
#define SPDIF_XFER_TXS_START (1 << SPDIF_XFER_TXS_SHIFT)
#define SPDIF_CFGR (0x0000)
#define SPDIF_SDBLR (0x0004)
#define SPDIF_DMACR (0x0008)
#define SPDIF_INTCR (0x000c)
#define SPDIF_INTSR (0x0010)
#define SPDIF_XFER (0x0018)
#define SPDIF_SMPDR (0x0020)
#endif /* _ROCKCHIP_SPDIF_H */