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linux_dsm_epyc7002/sound/soc/rockchip/rockchip_pdm.c
Thomas Gleixner 9c92ab6191 treewide: Replace GPLv2 boilerplate/reference with SPDX - rule 282 
Based on 1 normalized pattern(s):

  this software is licensed under the terms of the gnu general public
  license version 2 as published by the free software foundation and
  may be copied distributed and modified under those terms this
  program is distributed in the hope that it will be useful but
  without any warranty without even the implied warranty of
  merchantability or fitness for a particular purpose see the gnu
  general public license for more details

extracted by the scancode license scanner the SPDX license identifier

  GPL-2.0-only

has been chosen to replace the boilerplate/reference in 285 file(s).

Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Reviewed-by: Alexios Zavras <alexios.zavras@intel.com>
Reviewed-by: Allison Randal <allison@lohutok.net>
Cc: linux-spdx@vger.kernel.org
Link: https://lkml.kernel.org/r/20190529141900.642774971@linutronix.de
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-06-05 17:36:37 +02:00

625 lines
14 KiB
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// SPDX-License-Identifier: GPL-2.0-only
/*
* Rockchip PDM ALSA SoC Digital Audio Interface(DAI) driver
*
* Copyright (C) 2017 Fuzhou Rockchip Electronics Co., Ltd
*/
#include <linux/module.h>
#include <linux/clk.h>
#include <linux/of.h>
#include <linux/of_device.h>
#include <linux/pm_runtime.h>
#include <linux/rational.h>
#include <linux/regmap.h>
#include <linux/reset.h>
#include <sound/dmaengine_pcm.h>
#include <sound/pcm_params.h>
#include "rockchip_pdm.h"
#define PDM_DMA_BURST_SIZE (8) /* size * width: 8*4 = 32 bytes */
#define PDM_SIGNOFF_CLK_RATE (100000000)
enum rk_pdm_version {
RK_PDM_RK3229,
RK_PDM_RK3308,
};
struct rk_pdm_dev {
struct device *dev;
struct clk *clk;
struct clk *hclk;
struct regmap *regmap;
struct snd_dmaengine_dai_dma_data capture_dma_data;
struct reset_control *reset;
enum rk_pdm_version version;
};
struct rk_pdm_clkref {
unsigned int sr;
unsigned int clk;
unsigned int clk_out;
};
struct rk_pdm_ds_ratio {
unsigned int ratio;
unsigned int sr;
};
static struct rk_pdm_clkref clkref[] = {
{ 8000, 40960000, 2048000 },
{ 11025, 56448000, 2822400 },
{ 12000, 61440000, 3072000 },
{ 8000, 98304000, 2048000 },
{ 12000, 98304000, 3072000 },
};
static struct rk_pdm_ds_ratio ds_ratio[] = {
{ 0, 192000 },
{ 0, 176400 },
{ 0, 128000 },
{ 1, 96000 },
{ 1, 88200 },
{ 1, 64000 },
{ 2, 48000 },
{ 2, 44100 },
{ 2, 32000 },
{ 3, 24000 },
{ 3, 22050 },
{ 3, 16000 },
{ 4, 12000 },
{ 4, 11025 },
{ 4, 8000 },
};
static unsigned int get_pdm_clk(struct rk_pdm_dev *pdm, unsigned int sr,
unsigned int *clk_src, unsigned int *clk_out)
{
unsigned int i, count, clk, div, rate;
clk = 0;
if (!sr)
return clk;
count = ARRAY_SIZE(clkref);
for (i = 0; i < count; i++) {
if (sr % clkref[i].sr)
continue;
div = sr / clkref[i].sr;
if ((div & (div - 1)) == 0) {
*clk_out = clkref[i].clk_out;
rate = clk_round_rate(pdm->clk, clkref[i].clk);
if (rate != clkref[i].clk)
continue;
clk = clkref[i].clk;
*clk_src = clkref[i].clk;
break;
}
}
if (!clk) {
clk = clk_round_rate(pdm->clk, PDM_SIGNOFF_CLK_RATE);
*clk_src = clk;
}
return clk;
}
static unsigned int get_pdm_ds_ratio(unsigned int sr)
{
unsigned int i, count, ratio;
ratio = 0;
if (!sr)
return ratio;
count = ARRAY_SIZE(ds_ratio);
for (i = 0; i < count; i++) {
if (sr == ds_ratio[i].sr)
ratio = ds_ratio[i].ratio;
}
return ratio;
}
static inline struct rk_pdm_dev *to_info(struct snd_soc_dai *dai)
{
return snd_soc_dai_get_drvdata(dai);
}
static void rockchip_pdm_rxctrl(struct rk_pdm_dev *pdm, int on)
{
if (on) {
regmap_update_bits(pdm->regmap, PDM_DMA_CTRL,
PDM_DMA_RD_MSK, PDM_DMA_RD_EN);
regmap_update_bits(pdm->regmap, PDM_SYSCONFIG,
PDM_RX_MASK, PDM_RX_START);
} else {
regmap_update_bits(pdm->regmap, PDM_DMA_CTRL,
PDM_DMA_RD_MSK, PDM_DMA_RD_DIS);
regmap_update_bits(pdm->regmap, PDM_SYSCONFIG,
PDM_RX_MASK | PDM_RX_CLR_MASK,
PDM_RX_STOP | PDM_RX_CLR_WR);
}
}
static int rockchip_pdm_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct rk_pdm_dev *pdm = to_info(dai);
unsigned int val = 0;
unsigned int clk_rate, clk_div, samplerate;
unsigned int clk_src, clk_out = 0;
unsigned long m, n;
bool change;
int ret;
if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
return 0;
samplerate = params_rate(params);
clk_rate = get_pdm_clk(pdm, samplerate, &clk_src, &clk_out);
if (!clk_rate)
return -EINVAL;
ret = clk_set_rate(pdm->clk, clk_src);
if (ret)
return -EINVAL;
if (pdm->version == RK_PDM_RK3308) {
rational_best_approximation(clk_out, clk_src,
GENMASK(16 - 1, 0),
GENMASK(16 - 1, 0),
&m, &n);
val = (m << PDM_FD_NUMERATOR_SFT) |
(n << PDM_FD_DENOMINATOR_SFT);
regmap_update_bits_check(pdm->regmap, PDM_CTRL1,
PDM_FD_NUMERATOR_MSK |
PDM_FD_DENOMINATOR_MSK,
val, &change);
if (change) {
reset_control_assert(pdm->reset);
reset_control_deassert(pdm->reset);
rockchip_pdm_rxctrl(pdm, 0);
}
clk_div = n / m;
if (clk_div >= 40)
val = PDM_CLK_FD_RATIO_40;
else if (clk_div <= 35)
val = PDM_CLK_FD_RATIO_35;
else
return -EINVAL;
regmap_update_bits(pdm->regmap, PDM_CLK_CTRL,
PDM_CLK_FD_RATIO_MSK,
val);
}
val = get_pdm_ds_ratio(samplerate);
regmap_update_bits(pdm->regmap, PDM_CLK_CTRL, PDM_DS_RATIO_MSK, val);
regmap_update_bits(pdm->regmap, PDM_HPF_CTRL,
PDM_HPF_CF_MSK, PDM_HPF_60HZ);
regmap_update_bits(pdm->regmap, PDM_HPF_CTRL,
PDM_HPF_LE | PDM_HPF_RE, PDM_HPF_LE | PDM_HPF_RE);
regmap_update_bits(pdm->regmap, PDM_CLK_CTRL, PDM_CLK_EN, PDM_CLK_EN);
if (pdm->version != RK_PDM_RK3229)
regmap_update_bits(pdm->regmap, PDM_CTRL0,
PDM_MODE_MSK, PDM_MODE_LJ);
val = 0;
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S8:
val |= PDM_VDW(8);
break;
case SNDRV_PCM_FORMAT_S16_LE:
val |= PDM_VDW(16);
break;
case SNDRV_PCM_FORMAT_S20_3LE:
val |= PDM_VDW(20);
break;
case SNDRV_PCM_FORMAT_S24_LE:
val |= PDM_VDW(24);
break;
case SNDRV_PCM_FORMAT_S32_LE:
val |= PDM_VDW(32);
break;
default:
return -EINVAL;
}
switch (params_channels(params)) {
case 8:
val |= PDM_PATH3_EN;
/* fallthrough */
case 6:
val |= PDM_PATH2_EN;
/* fallthrough */
case 4:
val |= PDM_PATH1_EN;
/* fallthrough */
case 2:
val |= PDM_PATH0_EN;
break;
default:
dev_err(pdm->dev, "invalid channel: %d\n",
params_channels(params));
return -EINVAL;
}
regmap_update_bits(pdm->regmap, PDM_CTRL0,
PDM_PATH_MSK | PDM_VDW_MSK,
val);
/* all channels share the single FIFO */
regmap_update_bits(pdm->regmap, PDM_DMA_CTRL, PDM_DMA_RDL_MSK,
PDM_DMA_RDL(8 * params_channels(params)));
return 0;
}
static int rockchip_pdm_set_fmt(struct snd_soc_dai *cpu_dai,
unsigned int fmt)
{
struct rk_pdm_dev *pdm = to_info(cpu_dai);
unsigned int mask = 0, val = 0;
mask = PDM_CKP_MSK;
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_NB_NF:
val = PDM_CKP_NORMAL;
break;
case SND_SOC_DAIFMT_IB_NF:
val = PDM_CKP_INVERTED;
break;
default:
return -EINVAL;
}
pm_runtime_get_sync(cpu_dai->dev);
regmap_update_bits(pdm->regmap, PDM_CLK_CTRL, mask, val);
pm_runtime_put(cpu_dai->dev);
return 0;
}
static int rockchip_pdm_trigger(struct snd_pcm_substream *substream, int cmd,
struct snd_soc_dai *dai)
{
struct rk_pdm_dev *pdm = to_info(dai);
int ret = 0;
switch (cmd) {
case SNDRV_PCM_TRIGGER_START:
case SNDRV_PCM_TRIGGER_RESUME:
case SNDRV_PCM_TRIGGER_PAUSE_RELEASE:
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
rockchip_pdm_rxctrl(pdm, 1);
break;
case SNDRV_PCM_TRIGGER_SUSPEND:
case SNDRV_PCM_TRIGGER_STOP:
case SNDRV_PCM_TRIGGER_PAUSE_PUSH:
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE)
rockchip_pdm_rxctrl(pdm, 0);
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
static int rockchip_pdm_dai_probe(struct snd_soc_dai *dai)
{
struct rk_pdm_dev *pdm = to_info(dai);
dai->capture_dma_data = &pdm->capture_dma_data;
return 0;
}
static const struct snd_soc_dai_ops rockchip_pdm_dai_ops = {
.set_fmt = rockchip_pdm_set_fmt,
.trigger = rockchip_pdm_trigger,
.hw_params = rockchip_pdm_hw_params,
};
#define ROCKCHIP_PDM_RATES SNDRV_PCM_RATE_8000_192000
#define ROCKCHIP_PDM_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | \
SNDRV_PCM_FMTBIT_S20_3LE | \
SNDRV_PCM_FMTBIT_S24_LE | \
SNDRV_PCM_FMTBIT_S32_LE)
static struct snd_soc_dai_driver rockchip_pdm_dai = {
.probe = rockchip_pdm_dai_probe,
.capture = {
.stream_name = "Capture",
.channels_min = 2,
.channels_max = 8,
.rates = ROCKCHIP_PDM_RATES,
.formats = ROCKCHIP_PDM_FORMATS,
},
.ops = &rockchip_pdm_dai_ops,
.symmetric_rates = 1,
};
static const struct snd_soc_component_driver rockchip_pdm_component = {
.name = "rockchip-pdm",
};
static int rockchip_pdm_runtime_suspend(struct device *dev)
{
struct rk_pdm_dev *pdm = dev_get_drvdata(dev);
clk_disable_unprepare(pdm->clk);
clk_disable_unprepare(pdm->hclk);
return 0;
}
static int rockchip_pdm_runtime_resume(struct device *dev)
{
struct rk_pdm_dev *pdm = dev_get_drvdata(dev);
int ret;
ret = clk_prepare_enable(pdm->clk);
if (ret) {
dev_err(pdm->dev, "clock enable failed %d\n", ret);
return ret;
}
ret = clk_prepare_enable(pdm->hclk);
if (ret) {
dev_err(pdm->dev, "hclock enable failed %d\n", ret);
return ret;
}
return 0;
}
static bool rockchip_pdm_wr_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case PDM_SYSCONFIG:
case PDM_CTRL0:
case PDM_CTRL1:
case PDM_CLK_CTRL:
case PDM_HPF_CTRL:
case PDM_FIFO_CTRL:
case PDM_DMA_CTRL:
case PDM_INT_EN:
case PDM_INT_CLR:
case PDM_DATA_VALID:
return true;
default:
return false;
}
}
static bool rockchip_pdm_rd_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case PDM_SYSCONFIG:
case PDM_CTRL0:
case PDM_CTRL1:
case PDM_CLK_CTRL:
case PDM_HPF_CTRL:
case PDM_FIFO_CTRL:
case PDM_DMA_CTRL:
case PDM_INT_EN:
case PDM_INT_CLR:
case PDM_INT_ST:
case PDM_DATA_VALID:
case PDM_RXFIFO_DATA:
case PDM_VERSION:
return true;
default:
return false;
}
}
static bool rockchip_pdm_volatile_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case PDM_SYSCONFIG:
case PDM_FIFO_CTRL:
case PDM_INT_CLR:
case PDM_INT_ST:
case PDM_RXFIFO_DATA:
return true;
default:
return false;
}
}
static bool rockchip_pdm_precious_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
case PDM_RXFIFO_DATA:
return true;
default:
return false;
}
}
static const struct reg_default rockchip_pdm_reg_defaults[] = {
{0x04, 0x78000017},
{0x08, 0x0bb8ea60},
{0x18, 0x0000001f},
};
static const struct regmap_config rockchip_pdm_regmap_config = {
.reg_bits = 32,
.reg_stride = 4,
.val_bits = 32,
.max_register = PDM_VERSION,
.reg_defaults = rockchip_pdm_reg_defaults,
.num_reg_defaults = ARRAY_SIZE(rockchip_pdm_reg_defaults),
.writeable_reg = rockchip_pdm_wr_reg,
.readable_reg = rockchip_pdm_rd_reg,
.volatile_reg = rockchip_pdm_volatile_reg,
.precious_reg = rockchip_pdm_precious_reg,
.cache_type = REGCACHE_FLAT,
};
static const struct of_device_id rockchip_pdm_match[] = {
{ .compatible = "rockchip,pdm",
.data = (void *)RK_PDM_RK3229 },
{ .compatible = "rockchip,px30-pdm",
.data = (void *)RK_PDM_RK3308 },
{ .compatible = "rockchip,rk1808-pdm",
.data = (void *)RK_PDM_RK3308 },
{ .compatible = "rockchip,rk3308-pdm",
.data = (void *)RK_PDM_RK3308 },
{},
};
MODULE_DEVICE_TABLE(of, rockchip_pdm_match);
static int rockchip_pdm_probe(struct platform_device *pdev)
{
const struct of_device_id *match;
struct rk_pdm_dev *pdm;
struct resource *res;
void __iomem *regs;
int ret;
pdm = devm_kzalloc(&pdev->dev, sizeof(*pdm), GFP_KERNEL);
if (!pdm)
return -ENOMEM;
match = of_match_device(rockchip_pdm_match, &pdev->dev);
if (match)
pdm->version = (enum rk_pdm_version)match->data;
if (pdm->version == RK_PDM_RK3308) {
pdm->reset = devm_reset_control_get(&pdev->dev, "pdm-m");
if (IS_ERR(pdm->reset))
return PTR_ERR(pdm->reset);
}
res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
regs = devm_ioremap_resource(&pdev->dev, res);
if (IS_ERR(regs))
return PTR_ERR(regs);
pdm->regmap = devm_regmap_init_mmio(&pdev->dev, regs,
&rockchip_pdm_regmap_config);
if (IS_ERR(pdm->regmap))
return PTR_ERR(pdm->regmap);
pdm->capture_dma_data.addr = res->start + PDM_RXFIFO_DATA;
pdm->capture_dma_data.addr_width = DMA_SLAVE_BUSWIDTH_4_BYTES;
pdm->capture_dma_data.maxburst = PDM_DMA_BURST_SIZE;
pdm->dev = &pdev->dev;
dev_set_drvdata(&pdev->dev, pdm);
pdm->clk = devm_clk_get(&pdev->dev, "pdm_clk");
if (IS_ERR(pdm->clk))
return PTR_ERR(pdm->clk);
pdm->hclk = devm_clk_get(&pdev->dev, "pdm_hclk");
if (IS_ERR(pdm->hclk))
return PTR_ERR(pdm->hclk);
ret = clk_prepare_enable(pdm->hclk);
if (ret)
return ret;
pm_runtime_enable(&pdev->dev);
if (!pm_runtime_enabled(&pdev->dev)) {
ret = rockchip_pdm_runtime_resume(&pdev->dev);
if (ret)
goto err_pm_disable;
}
ret = devm_snd_soc_register_component(&pdev->dev,
&rockchip_pdm_component,
&rockchip_pdm_dai, 1);
if (ret) {
dev_err(&pdev->dev, "could not register dai: %d\n", ret);
goto err_suspend;
}
rockchip_pdm_rxctrl(pdm, 0);
ret = devm_snd_dmaengine_pcm_register(&pdev->dev, NULL, 0);
if (ret) {
dev_err(&pdev->dev, "could not register pcm: %d\n", ret);
goto err_suspend;
}
return 0;
err_suspend:
if (!pm_runtime_status_suspended(&pdev->dev))
rockchip_pdm_runtime_suspend(&pdev->dev);
err_pm_disable:
pm_runtime_disable(&pdev->dev);
clk_disable_unprepare(pdm->hclk);
return ret;
}
static int rockchip_pdm_remove(struct platform_device *pdev)
{
struct rk_pdm_dev *pdm = dev_get_drvdata(&pdev->dev);
pm_runtime_disable(&pdev->dev);
if (!pm_runtime_status_suspended(&pdev->dev))
rockchip_pdm_runtime_suspend(&pdev->dev);
clk_disable_unprepare(pdm->clk);
clk_disable_unprepare(pdm->hclk);
return 0;
}
#ifdef CONFIG_PM_SLEEP
static int rockchip_pdm_suspend(struct device *dev)
{
struct rk_pdm_dev *pdm = dev_get_drvdata(dev);
regcache_mark_dirty(pdm->regmap);
return 0;
}
static int rockchip_pdm_resume(struct device *dev)
{
struct rk_pdm_dev *pdm = dev_get_drvdata(dev);
int ret;
ret = pm_runtime_get_sync(dev);
if (ret < 0)
return ret;
ret = regcache_sync(pdm->regmap);
pm_runtime_put(dev);
return ret;
}
#endif
static const struct dev_pm_ops rockchip_pdm_pm_ops = {
SET_RUNTIME_PM_OPS(rockchip_pdm_runtime_suspend,
rockchip_pdm_runtime_resume, NULL)
SET_SYSTEM_SLEEP_PM_OPS(rockchip_pdm_suspend, rockchip_pdm_resume)
};
static struct platform_driver rockchip_pdm_driver = {
.probe = rockchip_pdm_probe,
.remove = rockchip_pdm_remove,
.driver = {
.name = "rockchip-pdm",
.of_match_table = of_match_ptr(rockchip_pdm_match),
.pm = &rockchip_pdm_pm_ops,
},
};
module_platform_driver(rockchip_pdm_driver);
MODULE_AUTHOR("Sugar <sugar.zhang@rock-chips.com>");
MODULE_DESCRIPTION("Rockchip PDM Controller Driver");
MODULE_LICENSE("GPL v2");
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