Introduce support for Cirrus Logic Device CS40L50: a
haptic driver with waveform memory, integrated DSP,
and closed-loop algorithms.
The ASoC driver enables I2S streaming to the device.
Reviewed-by: David Rhodes <drhodes@xxxxxxxxxxxxxxxxxxxxx>
Signed-off-by: James Ogletree <jogletre@xxxxxxxxxxxxxxxxxxxxx>
---
MAINTAINERS | 1 +
sound/soc/codecs/Kconfig | 11 ++
sound/soc/codecs/Makefile | 2 +
sound/soc/codecs/cs40l50-codec.c | 307 +++++++++++++++++++++++++++++++
4 files changed, 321 insertions(+)
create mode 100644 sound/soc/codecs/cs40l50-codec.c
diff --git a/MAINTAINERS b/MAINTAINERS
index 49c2e6e57b09..62701b13f741 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -4943,6 +4943,7 @@ F: Documentation/devicetree/bindings/input/cirrus,cs40l50.yaml
F: drivers/input/misc/cs40l*
F: drivers/mfd/cs40l*
F: include/linux/mfd/cs40l*
+F: sound/soc/codecs/cs40l*
CIRRUS LOGIC DSP FIRMWARE DRIVER
M: Simon Trimmer <simont@xxxxxxxxxxxxxxxxxxxxx>
diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index f1e1dbc509f6..1a81bedfdbe3 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -73,6 +73,7 @@ config SND_SOC_ALL_CODECS
imply SND_SOC_CS35L56_I2C
imply SND_SOC_CS35L56_SPI
imply SND_SOC_CS35L56_SDW
+ imply SND_SOC_CS40L50
imply SND_SOC_CS42L42
imply SND_SOC_CS42L42_SDW
imply SND_SOC_CS42L43
@@ -800,6 +801,16 @@ config SND_SOC_CS35L56_SDW
help
Enable support for Cirrus Logic CS35L56 boosted amplifier with SoundWire control
+config SND_SOC_CS40L50
+ tristate "Cirrus Logic CS40L50 CODEC"
+ depends on MFD_CS40L50_CORE
+ help
+ This option enables support for I2S streaming to Cirrus Logic CS40L50.
+
+ CS40L50 is a haptic driver with waveform memory, an integrated
+ DSP, and closed-loop algorithms. If built as a module, it will be
+ called snd-soc-cs40l50.
+
config SND_SOC_CS42L42_CORE
tristate
diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile
index b4df22186e25..3afd7c16c959 100644
--- a/sound/soc/codecs/Makefile
+++ b/sound/soc/codecs/Makefile
@@ -78,6 +78,7 @@ snd-soc-cs35l56-shared-y := cs35l56-shared.o
snd-soc-cs35l56-i2c-y := cs35l56-i2c.o
snd-soc-cs35l56-spi-y := cs35l56-spi.o
snd-soc-cs35l56-sdw-y := cs35l56-sdw.o
+snd-soc-cs40l50-objs := cs40l50-codec.o
snd-soc-cs42l42-y := cs42l42.o
snd-soc-cs42l42-i2c-y := cs42l42-i2c.o
snd-soc-cs42l42-sdw-y := cs42l42-sdw.o
@@ -475,6 +476,7 @@ obj-$(CONFIG_SND_SOC_CS35L56_SHARED) += snd-soc-cs35l56-shared.o
obj-$(CONFIG_SND_SOC_CS35L56_I2C) += snd-soc-cs35l56-i2c.o
obj-$(CONFIG_SND_SOC_CS35L56_SPI) += snd-soc-cs35l56-spi.o
obj-$(CONFIG_SND_SOC_CS35L56_SDW) += snd-soc-cs35l56-sdw.o
+obj-$(CONFIG_SND_SOC_CS40L50) += snd-soc-cs40l50.o
obj-$(CONFIG_SND_SOC_CS42L42_CORE) += snd-soc-cs42l42.o
obj-$(CONFIG_SND_SOC_CS42L42) += snd-soc-cs42l42-i2c.o
obj-$(CONFIG_SND_SOC_CS42L42_SDW) += snd-soc-cs42l42-sdw.o
diff --git a/sound/soc/codecs/cs40l50-codec.c b/sound/soc/codecs/cs40l50-codec.c
new file mode 100644
index 000000000000..aa629ef53db4
--- /dev/null
+++ b/sound/soc/codecs/cs40l50-codec.c
@@ -0,0 +1,307 @@
+// SPDX-License-Identifier: GPL-2.0
+//
+// CS40L50 Advanced Haptic Driver with waveform memory,
+// integrated DSP, and closed-loop algorithms
+//
+// Copyright 2024 Cirrus Logic, Inc.
+//
+// Author: James Ogletree <james.ogletree@xxxxxxxxxx>
+
+#include <linux/bitfield.h>
+#include <linux/mfd/cs40l50.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+
+#define CS40L50_REFCLK_INPUT 0x2C04
+#define CS40L50_ASP_CONTROL2 0x4808
+#define CS40L50_ASP_DATA_CONTROL5 0x4840
+
+/* PLL Config */
+#define CS40L50_PLL_REFCLK_BCLK 0x0
+#define CS40L50_PLL_REFCLK_MCLK 0x5
+#define CS40L50_PLL_REEFCLK_MCLK_CFG 0x00
+#define CS40L50_PLL_REFCLK_LOOP_MASK BIT(11)
+#define CS40L50_PLL_REFCLK_OPEN_LOOP 1
+#define CS40L50_PLL_REFCLK_CLOSED_LOOP 0
+#define CS40L50_PLL_REFCLK_LOOP_SHIFT 11
+#define CS40L50_PLL_REFCLK_FREQ_MASK GENMASK(10, 5)
+#define CS40L50_PLL_REFCLK_FREQ_SHIFT 5
+#define CS40L50_PLL_REFCLK_SEL_MASK GENMASK(2, 0)
+#define CS40L50_BCLK_RATIO_DEFAULT 32
+
+/* ASP Config */
+#define CS40L50_ASP_RX_WIDTH_SHIFT 24
+#define CS40L50_ASP_RX_WIDTH_MASK GENMASK(31, 24)
+#define CS40L50_ASP_RX_WL_MASK GENMASK(5, 0)
+#define CS40L50_ASP_FSYNC_INV_MASK BIT(2)
+#define CS40L50_ASP_BCLK_INV_MASK BIT(6)
+#define CS40L50_ASP_FMT_MASK GENMASK(10, 8)
+#define CS40L50_ASP_FMT_I2S 0x2
+
+struct cs40l50_pll_config {
+ unsigned int freq;
+ unsigned int cfg;
+};
+
+struct cs40l50_codec {
+ struct device *dev;
+ struct regmap *regmap;
+ unsigned int daifmt;
+ unsigned int bclk_ratio;
+ unsigned int rate;
+};
+
+static const struct cs40l50_pll_config cs40l50_pll_cfg[] = {
+ { 32768, 0x00 },
+ { 1536000, 0x1B },
+ { 3072000, 0x21 },
+ { 6144000, 0x28 },
+ { 9600000, 0x30 },
+ { 12288000, 0x33 },
+};
+
+static int cs40l50_get_clk_config(const unsigned int freq, unsigned int *cfg)
+{
+ int i;
+
+ for (i = 0; i < ARRAY_SIZE(cs40l50_pll_cfg); i++) {
+ if (cs40l50_pll_cfg[i].freq == freq) {
+ *cfg = cs40l50_pll_cfg[i].cfg;
+ return 0;
+ }
+ }
+
+ return -EINVAL;
+}
+
+static int cs40l50_swap_ext_clk(struct cs40l50_codec *codec, const unsigned int clk_src)
+{
+ unsigned int cfg;
+ int ret;
+
+ switch (clk_src) {
+ case CS40L50_PLL_REFCLK_BCLK:
+ ret = cs40l50_get_clk_config(codec->bclk_ratio * codec->rate, &cfg);
+ if (ret)
+ return ret;
+ break;
+ case CS40L50_PLL_REFCLK_MCLK:
+ cfg = CS40L50_PLL_REEFCLK_MCLK_CFG;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ ret = regmap_update_bits(codec->regmap, CS40L50_REFCLK_INPUT,
+ CS40L50_PLL_REFCLK_LOOP_MASK,
+ CS40L50_PLL_REFCLK_OPEN_LOOP <<
+ CS40L50_PLL_REFCLK_LOOP_SHIFT);
+ if (ret)
+ return ret;
+
+ ret = regmap_update_bits(codec->regmap, CS40L50_REFCLK_INPUT,
+ CS40L50_PLL_REFCLK_FREQ_MASK |
+ CS40L50_PLL_REFCLK_SEL_MASK,
+ (cfg << CS40L50_PLL_REFCLK_FREQ_SHIFT) | clk_src);
+ if (ret)
+ return ret;
+
+ return regmap_update_bits(codec->regmap, CS40L50_REFCLK_INPUT,
+ CS40L50_PLL_REFCLK_LOOP_MASK,
+ CS40L50_PLL_REFCLK_CLOSED_LOOP <<
+ CS40L50_PLL_REFCLK_LOOP_SHIFT);
+}
+
+static int cs40l50_clk_en(struct snd_soc_dapm_widget *w,
+ struct snd_kcontrol *kcontrol,
+ int event)
+{
+ struct snd_soc_component *comp = snd_soc_dapm_to_component(w->dapm);
+ struct cs40l50_codec *codec = snd_soc_component_get_drvdata(comp);
+ int ret;
+
+ switch (event) {
+ case SND_SOC_DAPM_POST_PMU:
+ ret = cs40l50_dsp_write(codec->dev, codec->regmap, CS40L50_STOP_PLAYBACK);
+ if (ret)
+ return ret;
+
+ ret = cs40l50_dsp_write(codec->dev, codec->regmap, CS40L50_START_I2S);
+ if (ret)
+ return ret;
+
+ ret = cs40l50_swap_ext_clk(codec, CS40L50_PLL_REFCLK_BCLK);
+ if (ret)
+ return ret;
+ break;
+ case SND_SOC_DAPM_PRE_PMD:
+ ret = cs40l50_swap_ext_clk(codec, CS40L50_PLL_REFCLK_MCLK);
+ if (ret)
+ return ret;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static const struct snd_soc_dapm_widget cs40l50_dapm_widgets[] = {
+ SND_SOC_DAPM_SUPPLY_S("ASP PLL", 0, SND_SOC_NOPM, 0, 0, cs40l50_clk_en,
+ SND_SOC_DAPM_POST_PMU | SND_SOC_DAPM_PRE_PMD),
+ SND_SOC_DAPM_AIF_IN("ASPRX1", NULL, 0, SND_SOC_NOPM, 0, 0),
+ SND_SOC_DAPM_AIF_IN("ASPRX2", NULL, 0, SND_SOC_NOPM, 0, 0),
+ SND_SOC_DAPM_OUTPUT("OUT"),
+};
+
+static const struct snd_soc_dapm_route cs40l50_dapm_routes[] = {
+ { "ASP Playback", NULL, "ASP PLL" },
+ { "ASPRX1", NULL, "ASP Playback" },
+ { "ASPRX2", NULL, "ASP Playback" },
+
+ { "OUT", NULL, "ASPRX1" },
+ { "OUT", NULL, "ASPRX2" },
+};
+
+static int cs40l50_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt)
+{
+ struct cs40l50_codec *codec = snd_soc_component_get_drvdata(codec_dai->component);
+
+ if ((fmt & SND_SOC_DAIFMT_MASTER_MASK) != SND_SOC_DAIFMT_CBC_CFC)
+ return -EINVAL;
+
+ switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+ case SND_SOC_DAIFMT_NB_NF:
+ codec->daifmt = 0;
+ break;
+ case SND_SOC_DAIFMT_NB_IF:
+ codec->daifmt = CS40L50_ASP_FSYNC_INV_MASK;
+ break;
+ case SND_SOC_DAIFMT_IB_NF:
+ codec->daifmt = CS40L50_ASP_BCLK_INV_MASK;
+ break;
+ case SND_SOC_DAIFMT_IB_IF:
+ codec->daifmt = CS40L50_ASP_FSYNC_INV_MASK | CS40L50_ASP_BCLK_INV_MASK;
+ break;
+ default:
+ dev_err(codec->dev, "Invalid clock invert\n");
+ return -EINVAL;
+ }
+
+ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+ case SND_SOC_DAIFMT_I2S:
+ codec->daifmt |= FIELD_PREP(CS40L50_ASP_FMT_MASK, CS40L50_ASP_FMT_I2S);
+ break;
+ default:
+ dev_err(codec->dev, "Unsupported DAI format\n");
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int cs40l50_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct cs40l50_codec *codec = snd_soc_component_get_drvdata(dai->component);
+ unsigned int asp_rx_wl = params_width(params);
+ int ret;
+
+ codec->rate = params_rate(params);
+
+ ret = regmap_update_bits(codec->regmap, CS40L50_ASP_DATA_CONTROL5,
+ CS40L50_ASP_RX_WL_MASK, asp_rx_wl);
+ if (ret)
+ return ret;
+
+ codec->daifmt |= (asp_rx_wl << CS40L50_ASP_RX_WIDTH_SHIFT);
+
+ return regmap_update_bits(codec->regmap, CS40L50_ASP_CONTROL2,
+ CS40L50_ASP_FSYNC_INV_MASK |
+ CS40L50_ASP_BCLK_INV_MASK |
+ CS40L50_ASP_FMT_MASK |
+ CS40L50_ASP_RX_WIDTH_MASK, codec->daifmt);
+}
+
+static int cs40l50_set_dai_bclk_ratio(struct snd_soc_dai *dai, unsigned int ratio)
+{
+ struct cs40l50_codec *codec = snd_soc_component_get_drvdata(dai->component);
+
+ codec->bclk_ratio = ratio;
+
+ return 0;
+}
+
+static const struct snd_soc_dai_ops cs40l50_dai_ops = {
+ .set_fmt = cs40l50_set_dai_fmt,
+ .set_bclk_ratio = cs40l50_set_dai_bclk_ratio,
+ .hw_params = cs40l50_hw_params,
+};
+
+static struct snd_soc_dai_driver cs40l50_dai[] = {
+ {
+ .name = "cs40l50-pcm",
+ .id = 0,
+ .playback = {
+ .stream_name = "ASP Playback",
+ .channels_min = 1,
+ .channels_max = 2,
+ .rates = SNDRV_PCM_RATE_48000,
+ .formats = SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S24_LE,
+ },
+ .ops = &cs40l50_dai_ops,
+ },
+};
+
+static int cs40l50_codec_probe(struct snd_soc_component *component)
+{
+ struct cs40l50_codec *codec = snd_soc_component_get_drvdata(component);
+
+ codec->bclk_ratio = CS40L50_BCLK_RATIO_DEFAULT;
+
+ return 0;
+}
+
+static const struct snd_soc_component_driver soc_codec_dev_cs40l50 = {
+ .probe = cs40l50_codec_probe,
+ .dapm_widgets = cs40l50_dapm_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(cs40l50_dapm_widgets),
+ .dapm_routes = cs40l50_dapm_routes,
+ .num_dapm_routes = ARRAY_SIZE(cs40l50_dapm_routes),
+};
+
+static int cs40l50_codec_driver_probe(struct platform_device *pdev)
+{
+ struct cs40l50 *cs40l50 = dev_get_drvdata(pdev->dev.parent);
+ struct cs40l50_codec *codec;
+
+ codec = devm_kzalloc(&pdev->dev, sizeof(*codec), GFP_KERNEL);
+ if (!codec)
+ return -ENOMEM;
+
+ codec->regmap = cs40l50->regmap;
+ codec->dev = &pdev->dev;
+
+ return devm_snd_soc_register_component(&pdev->dev, &soc_codec_dev_cs40l50,
+ cs40l50_dai, ARRAY_SIZE(cs40l50_dai));
+}
+
+static const struct platform_device_id cs40l50_id[] = {
+ { "cs40l50-codec", },
+ {}
+};
+MODULE_DEVICE_TABLE(platform, cs40l50_id);
+
+static struct platform_driver cs40l50_codec_driver = {
+ .probe = cs40l50_codec_driver_probe,
+ .id_table = cs40l50_id,
+ .driver = {
+ .name = "cs40l50-codec",
+ },
+};
+module_platform_driver(cs40l50_codec_driver);
+
+MODULE_DESCRIPTION("ASoC CS40L50 driver");
+MODULE_AUTHOR("James Ogletree <james.ogletree@xxxxxxxxxx>");
+MODULE_LICENSE("GPL");
--
2.34.1
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