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Diffstat (limited to 'sound/soc/rockchip/rockchip_pdm.c')
-rw-r--r--sound/soc/rockchip/rockchip_pdm.c209
1 files changed, 163 insertions, 46 deletions
diff --git a/sound/soc/rockchip/rockchip_pdm.c b/sound/soc/rockchip/rockchip_pdm.c
index 400e29edb1c9..b9c1d8ad77c1 100644
--- a/sound/soc/rockchip/rockchip_pdm.c
+++ b/sound/soc/rockchip/rockchip_pdm.c
@@ -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 (16) /* size * width: 16*4 = 64 bytes */
+#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 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(unsigned int sr)
+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);
@@ -95,46 +158,61 @@ 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 = 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(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);
-
- 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;
+ 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)) {
@@ -176,16 +254,12 @@ 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_SYSCONFIG,
- PDM_RX_MASK | PDM_RX_CLR_MASK,
- PDM_RX_STOP | PDM_RX_CLR_WR);
- }
+ 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;
}
@@ -208,7 +282,9 @@ static int rockchip_pdm_set_fmt(struct snd_soc_dai *cpu_dai,
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;
}
@@ -341,6 +417,7 @@ static bool rockchip_pdm_rd_reg(struct device *dev, unsigned int reg)
case PDM_INT_CLR:
case PDM_INT_ST:
case PDM_DATA_VALID:
+ case PDM_RXFIFO_DATA:
case PDM_VERSION:
return true;
default:
@@ -352,27 +429,62 @@ 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;
@@ -382,6 +494,16 @@ 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))
@@ -427,6 +549,7 @@ static int rockchip_pdm_probe(struct platform_device *pdev)
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);
@@ -493,12 +616,6 @@ 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,
Copyright © 1996 – 2023 Jason A. Donenfeld. All Rights Reverse Engineered.