ASoC: rockchip: pdm: fixup pdm fractional div
This patch adds support fractional div for rk3308. Signed-off-by: Sugar Zhang <sugar.zhang@rock-chips.com> Signed-off-by: Mark Brown <broonie@kernel.org>
This commit is contained in:
Sugar Zhang
Mark Brown
parent
072cb68a43
commit
624e8e00ac
@ -17,14 +17,23 @@
|
||||
#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;
|
||||
@ -32,22 +41,51 @@ struct rk_pdm_dev {
|
||||
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 },
|
||||
{ 11025, 56448000 },
|
||||
{ 12000, 61440000 },
|
||||
{ 8000, 40960000, 2048000 },
|
||||
{ 11025, 56448000, 2822400 },
|
||||
{ 12000, 61440000, 3072000 },
|
||||
{ 8000, 98304000, 2048000 },
|
||||
{ 12000, 98304000, 3072000 },
|
||||
};
|
||||
|
||||
static unsigned int get_pdm_clk(unsigned int sr)
|
||||
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;
|
||||
unsigned int i, count, clk, div, rate;
|
||||
|
||||
clk = 0;
|
||||
if (!sr)
|
||||
@ -59,14 +97,39 @@ static unsigned int get_pdm_clk(unsigned int 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);
|
||||
@ -95,40 +158,52 @@ static int rockchip_pdm_hw_params(struct snd_pcm_substream *substream,
|
||||
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;
|
||||
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(samplerate);
|
||||
clk_rate = get_pdm_clk(pdm, samplerate, &clk_src, &clk_out);
|
||||
if (!clk_rate)
|
||||
return -EINVAL;
|
||||
|
||||
ret = clk_set_rate(pdm->clk, clk_rate);
|
||||
ret = clk_set_rate(pdm->clk, clk_src);
|
||||
if (ret)
|
||||
return -EINVAL;
|
||||
|
||||
clk_div = DIV_ROUND_CLOSEST(clk_rate, samplerate);
|
||||
if (pdm->version == RK_PDM_RK3308) {
|
||||
rational_best_approximation(clk_out, clk_src,
|
||||
GENMASK(16 - 1, 0),
|
||||
GENMASK(16 - 1, 0),
|
||||
&m, &n);
|
||||
|
||||
switch (clk_div) {
|
||||
case 320:
|
||||
val = PDM_CLK_320FS;
|
||||
break;
|
||||
case 640:
|
||||
val = PDM_CLK_640FS;
|
||||
break;
|
||||
case 1280:
|
||||
val = PDM_CLK_1280FS;
|
||||
break;
|
||||
case 2560:
|
||||
val = PDM_CLK_2560FS;
|
||||
break;
|
||||
case 5120:
|
||||
val = PDM_CLK_5120FS;
|
||||
break;
|
||||
default:
|
||||
dev_err(pdm->dev, "unsupported div: %d\n", clk_div);
|
||||
return -EINVAL;
|
||||
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);
|
||||
@ -177,13 +252,11 @@ static int rockchip_pdm_hw_params(struct snd_pcm_substream *substream,
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE) {
|
||||
regmap_update_bits(pdm->regmap, PDM_CTRL0,
|
||||
PDM_PATH_MSK | PDM_VDW_MSK,
|
||||
val);
|
||||
regmap_update_bits(pdm->regmap, PDM_DMA_CTRL, PDM_DMA_RDL_MSK,
|
||||
PDM_DMA_RDL(16));
|
||||
}
|
||||
regmap_update_bits(pdm->regmap, PDM_CTRL0,
|
||||
PDM_PATH_MSK | PDM_VDW_MSK,
|
||||
val);
|
||||
regmap_update_bits(pdm->regmap, PDM_DMA_CTRL, PDM_DMA_RDL_MSK,
|
||||
PDM_DMA_RDL(16));
|
||||
|
||||
return 0;
|
||||
}
|
||||
@ -380,8 +453,19 @@ static const struct regmap_config rockchip_pdm_regmap_config = {
|
||||
.cache_type = REGCACHE_FLAT,
|
||||
};
|
||||
|
||||
static const struct of_device_id rockchip_pdm_match[] = {
|
||||
{ .compatible = "rockchip,pdm", },
|
||||
{ .compatible = "rockchip,px30-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;
|
||||
@ -391,6 +475,16 @@ static int rockchip_pdm_probe(struct platform_device *pdev)
|
||||
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))
|
||||
@ -503,12 +597,6 @@ static const struct dev_pm_ops rockchip_pdm_pm_ops = {
|
||||
SET_SYSTEM_SLEEP_PM_OPS(rockchip_pdm_suspend, rockchip_pdm_resume)
|
||||
};
|
||||
|
||||
static const struct of_device_id rockchip_pdm_match[] = {
|
||||
{ .compatible = "rockchip,pdm", },
|
||||
{},
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, rockchip_pdm_match);
|
||||
|
||||
static struct platform_driver rockchip_pdm_driver = {
|
||||
.probe = rockchip_pdm_probe,
|
||||
.remove = rockchip_pdm_remove,
|
||||
|
||||
@ -53,7 +53,16 @@
|
||||
#define PDM_VDW_MSK (0x1f << 0)
|
||||
#define PDM_VDW(X) ((X - 1) << 0)
|
||||
|
||||
/* PDM CTRL1 */
|
||||
#define PDM_FD_NUMERATOR_SFT 16
|
||||
#define PDM_FD_NUMERATOR_MSK GENMASK(31, 16)
|
||||
#define PDM_FD_DENOMINATOR_SFT 0
|
||||
#define PDM_FD_DENOMINATOR_MSK GENMASK(15, 0)
|
||||
|
||||
/* PDM CLK CTRL */
|
||||
#define PDM_CLK_FD_RATIO_MSK BIT(6)
|
||||
#define PDM_CLK_FD_RATIO_40 (0X0 << 6)
|
||||
#define PDM_CLK_FD_RATIO_35 BIT(6)
|
||||
#define PDM_CLK_MSK BIT(5)
|
||||
#define PDM_CLK_EN BIT(5)
|
||||
#define PDM_CLK_DIS (0x0 << 5)
|
||||
|
||||
Loading…
Reference in New Issue
Block a user