new file mode 100644
@@ -0,0 +1,15 @@
+Analog Devices SSM4567 audio amplifier
+
+This device supports I2C only.
+
+Required properties:
+ - compatible : Must be "adi,ssm4567"
+ - reg : the I2C address of the device. This will either be 0x34 (LR_SEL/ADDR connected to AGND),
+ 0x35 (LR_SEL/ADDR connected to IOVDD) or 0x36 (LR_SEL/ADDR open).
+
+Example:
+
+ ssm4567: ssm4567@34 {
+ compatible = "adi,ssm4567";
+ reg = <0x34>;
+ };
@@ -94,6 +94,7 @@ config SND_SOC_ALL_CODECS
select SND_SOC_SSM2518 if I2C
select SND_SOC_SSM2602_SPI if SPI_MASTER
select SND_SOC_SSM2602_I2C if I2C
+ select SND_SOC_SSM4567 if I2C
select SND_SOC_STA32X if I2C
select SND_SOC_STA350 if I2C
select SND_SOC_STA529 if I2C
@@ -546,6 +547,9 @@ config SND_SOC_SSM2602_I2C
select SND_SOC_SSM2602
tristate
+config SND_SOC_SSM4567
+ tristate "Analog Devices ssm4567 amplifier driver support"
+
config SND_SOC_STA32X
tristate
@@ -95,6 +95,7 @@ snd-soc-ssm2518-objs := ssm2518.o
snd-soc-ssm2602-objs := ssm2602.o
snd-soc-ssm2602-spi-objs := ssm2602-spi.o
snd-soc-ssm2602-i2c-objs := ssm2602-i2c.o
+snd-soc-ssm4567-objs := ssm4567.o
snd-soc-sta32x-objs := sta32x.o
snd-soc-sta350-objs := sta350.o
snd-soc-sta529-objs := sta529.o
@@ -266,6 +267,7 @@ obj-$(CONFIG_SND_SOC_SSM2518) += snd-soc-ssm2518.o
obj-$(CONFIG_SND_SOC_SSM2602) += snd-soc-ssm2602.o
obj-$(CONFIG_SND_SOC_SSM2602_SPI) += snd-soc-ssm2602-spi.o
obj-$(CONFIG_SND_SOC_SSM2602_I2C) += snd-soc-ssm2602-i2c.o
+obj-$(CONFIG_SND_SOC_SSM4567) += snd-soc-ssm4567.o
obj-$(CONFIG_SND_SOC_STA32X) += snd-soc-sta32x.o
obj-$(CONFIG_SND_SOC_STA350) += snd-soc-sta350.o
obj-$(CONFIG_SND_SOC_STA529) += snd-soc-sta529.o
new file mode 100644
@@ -0,0 +1,350 @@
+/*
+ * SSM4567 amplifier audio driver
+ *
+ * Copyright 2014 Google Chromium project.
+ * Author: Anatol Pomozov <anatol@chromium.org>
+ *
+ * Based on code copyright/by:
+ * Copyright 2013 Analog Devices Inc.
+ *
+ * Licensed under the GPL-2.
+ */
+
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/i2c.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+#include <linux/gpio.h>
+#include <linux/of_gpio.h>
+#include <sound/core.h>
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/initval.h>
+#include <sound/tlv.h>
+
+#define SSM4567_REG_POWER_CTRL 0x00
+#define SSM4567_REG_AMP_SNS_CTRL 0x01
+#define SSM4567_REG_DAC_CTRL 0x02
+#define SSM4567_REG_DAC_VOLUME 0x03
+#define SSM4567_REG_SAI_CTRL_1 0x04
+#define SSM4567_REG_SAI_CTRL_2 0x05
+#define SSM4567_REG_SAI_PLACEMENT_1 0x06
+#define SSM4567_REG_SAI_PLACEMENT_2 0x07
+#define SSM4567_REG_SAI_PLACEMENT_3 0x08
+#define SSM4567_REG_SAI_PLACEMENT_4 0x09
+#define SSM4567_REG_SAI_PLACEMENT_5 0x0a
+#define SSM4567_REG_SAI_PLACEMENT_6 0x0b
+#define SSM4567_REG_BATTERY_V_OUT 0x0c
+#define SSM4567_REG_LIMITER_CTRL_1 0x0d
+#define SSM4567_REG_LIMITER_CTRL_2 0x0e
+#define SSM4567_REG_LIMITER_CTRL_3 0x0f
+#define SSM4567_REG_STATUS_1 0x10
+#define SSM4567_REG_STATUS_2 0x11
+#define SSM4567_REG_FAULT_CTRL 0x12
+#define SSM4567_REG_PDM_CTRL 0x13
+#define SSM4567_REG_MCLK_RATIO 0x14
+#define SSM4567_REG_BOOST_CTRL_1 0x15
+#define SSM4567_REG_BOOST_CTRL_2 0x16
+#define SSM4567_REG_SOFT_RESET 0xff
+
+/* POWER_CTRL */
+#define SSM4567_POWER_APWDN_EN BIT(7)
+#define SSM4567_POWER_BSNS_PWDN BIT(6)
+#define SSM4567_POWER_VSNS_PWDN BIT(5)
+#define SSM4567_POWER_ISNS_PWDN BIT(4)
+#define SSM4567_POWER_BOOST_PWDN BIT(3)
+#define SSM4567_POWER_AMP_PWDN BIT(2)
+#define SSM4567_POWER_VBAT_ONLY BIT(1)
+#define SSM4567_POWER_SPWDN BIT(0)
+
+/* DAC_CTRL */
+#define SSM4567_DAC_HV BIT(7)
+#define SSM4567_DAC_MUTE BIT(6)
+#define SSM4567_DAC_HPF BIT(5)
+#define SSM4567_DAC_LPM BIT(4)
+#define SSM4567_DAC_FS_MASK 0x7
+#define SSM4567_DAC_FS_8000_12000 0x0
+#define SSM4567_DAC_FS_16000_24000 0x1
+#define SSM4567_DAC_FS_32000_48000 0x2
+#define SSM4567_DAC_FS_64000_96000 0x3
+#define SSM4567_DAC_FS_128000_192000 0x4
+
+struct ssm4567 {
+ struct regmap *regmap;
+};
+
+static const struct reg_default ssm4567_reg_defaults[] = {
+ { SSM4567_REG_POWER_CTRL, 0x81 },
+ { SSM4567_REG_AMP_SNS_CTRL, 0x09 },
+ { SSM4567_REG_DAC_CTRL, 0x32 },
+ { SSM4567_REG_DAC_VOLUME, 0x40 },
+ { SSM4567_REG_SAI_CTRL_1, 0x00 },
+ { SSM4567_REG_SAI_CTRL_2, 0x08 },
+ { SSM4567_REG_SAI_PLACEMENT_1, 0x01 },
+ { SSM4567_REG_SAI_PLACEMENT_2, 0x20 },
+ { SSM4567_REG_SAI_PLACEMENT_3, 0x32 },
+ { SSM4567_REG_SAI_PLACEMENT_4, 0x07 },
+ { SSM4567_REG_SAI_PLACEMENT_5, 0x07 },
+ { SSM4567_REG_SAI_PLACEMENT_6, 0x07 },
+ { SSM4567_REG_BATTERY_V_OUT, 0x00 },
+ { SSM4567_REG_LIMITER_CTRL_1, 0xa4 },
+ { SSM4567_REG_LIMITER_CTRL_2, 0x73 },
+ { SSM4567_REG_LIMITER_CTRL_3, 0x00 },
+ { SSM4567_REG_STATUS_1, 0x00 },
+ { SSM4567_REG_STATUS_2, 0x00 },
+ { SSM4567_REG_FAULT_CTRL, 0x30 },
+ { SSM4567_REG_PDM_CTRL, 0x40 },
+ { SSM4567_REG_MCLK_RATIO, 0x11 },
+ { SSM4567_REG_BOOST_CTRL_1, 0x03 },
+ { SSM4567_REG_BOOST_CTRL_2, 0x00 },
+ { SSM4567_REG_SOFT_RESET, 0x00 },
+};
+
+
+static bool ssm4567_readable_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case SSM4567_REG_POWER_CTRL ... SSM4567_REG_BOOST_CTRL_2:
+ return true;
+ default:
+ return false;
+ }
+
+}
+
+static bool ssm4567_writeable_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case SSM4567_REG_POWER_CTRL ... SSM4567_REG_SAI_PLACEMENT_6:
+ case SSM4567_REG_LIMITER_CTRL_1 ... SSM4567_REG_LIMITER_CTRL_3:
+ case SSM4567_REG_FAULT_CTRL ... SSM4567_REG_BOOST_CTRL_2:
+ /* The datasheet states that soft reset register is read-only,
+ * but logically it is write-only. */
+ case SSM4567_REG_SOFT_RESET:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static bool ssm4567_volatile_reg(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case SSM4567_REG_BATTERY_V_OUT:
+ case SSM4567_REG_STATUS_1 ... SSM4567_REG_STATUS_2:
+ case SSM4567_REG_SOFT_RESET:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static const DECLARE_TLV_DB_MINMAX_MUTE(ssm4567_vol_tlv, -7125, 2400);
+
+static const struct snd_kcontrol_new ssm4567_snd_controls[] = {
+ SOC_SINGLE_TLV("Master Playback Volume", SSM4567_REG_DAC_VOLUME, 0,
+ 0xff, 1, ssm4567_vol_tlv),
+ SOC_SINGLE("Master Playback Switch", SSM4567_REG_DAC_CTRL, 6, 1, 1),
+ SOC_SINGLE("DAC Low Power Mode Switch", SSM4567_REG_DAC_CTRL, 4, 1, 0),
+};
+
+static const struct snd_soc_dapm_widget ssm4567_dapm_widgets[] = {
+ SND_SOC_DAPM_DAC("DAC", "HiFi Playback", SSM4567_REG_POWER_CTRL, 2, 1),
+
+ SND_SOC_DAPM_OUTPUT("OUT"),
+};
+
+static const struct snd_soc_dapm_route ssm4567_routes[] = {
+ { "OUT", NULL, "DAC" },
+};
+
+static int ssm4567_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params, struct snd_soc_dai *dai)
+{
+ struct snd_soc_codec *codec = dai->codec;
+ struct ssm4567 *ssm4567 = snd_soc_codec_get_drvdata(codec);
+ unsigned int rate = params_rate(params);
+ unsigned int dacfs;
+
+ if (rate >= 8000 && rate <= 12000)
+ dacfs = SSM4567_DAC_FS_8000_12000;
+ else if (rate >= 16000 && rate <= 24000)
+ dacfs = SSM4567_DAC_FS_16000_24000;
+ else if (rate >= 32000 && rate <= 48000)
+ dacfs = SSM4567_DAC_FS_32000_48000;
+ else if (rate >= 64000 && rate <= 96000)
+ dacfs = SSM4567_DAC_FS_64000_96000;
+ else if (rate >= 64000 && rate <= 96000)
+ dacfs = SSM4567_DAC_FS_64000_96000;
+ else if (rate >= 128000 && rate <= 192000)
+ dacfs = SSM4567_DAC_FS_128000_192000;
+ else
+ return -EINVAL;
+
+ return regmap_update_bits(ssm4567->regmap, SSM4567_REG_DAC_CTRL,
+ SSM4567_DAC_FS_MASK, dacfs);
+}
+
+static int ssm4567_mute(struct snd_soc_dai *dai, int mute)
+{
+ struct ssm4567 *ssm4567 = snd_soc_codec_get_drvdata(dai->codec);
+ unsigned int val;
+
+ val = mute ? SSM4567_DAC_MUTE : 0;
+ return regmap_update_bits(ssm4567->regmap, SSM4567_REG_DAC_CTRL,
+ SSM4567_DAC_MUTE, val);
+}
+
+static int ssm4567_set_power(struct ssm4567 *ssm4567, bool enable)
+{
+ int ret = 0;
+
+ if (!enable) {
+ ret = regmap_update_bits(ssm4567->regmap,
+ SSM4567_REG_POWER_CTRL,
+ SSM4567_POWER_SPWDN, SSM4567_POWER_SPWDN);
+ regcache_mark_dirty(ssm4567->regmap);
+ }
+
+ regcache_cache_only(ssm4567->regmap, !enable);
+
+ if (enable) {
+ ret = regmap_update_bits(ssm4567->regmap,
+ SSM4567_REG_POWER_CTRL,
+ SSM4567_POWER_SPWDN, 0x00);
+ regcache_sync(ssm4567->regmap);
+ }
+
+ return ret;
+}
+
+static int ssm4567_set_bias_level(struct snd_soc_codec *codec,
+ enum snd_soc_bias_level level)
+{
+ struct ssm4567 *ssm4567 = snd_soc_codec_get_drvdata(codec);
+ int ret = 0;
+
+ switch (level) {
+ case SND_SOC_BIAS_ON:
+ break;
+ case SND_SOC_BIAS_PREPARE:
+ break;
+ case SND_SOC_BIAS_STANDBY:
+ if (codec->dapm.bias_level == SND_SOC_BIAS_OFF)
+ ret = ssm4567_set_power(ssm4567, true);
+ break;
+ case SND_SOC_BIAS_OFF:
+ ret = ssm4567_set_power(ssm4567, false);
+ break;
+ }
+
+ if (ret)
+ return ret;
+
+ codec->dapm.bias_level = level;
+
+ return 0;
+}
+
+#define SSM4567_FORMATS (SNDRV_PCM_FMTBIT_S8 | SNDRV_PCM_FMTBIT_S16_LE | \
+ SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32)
+
+static const struct snd_soc_dai_ops ssm4567_dai_ops = {
+ .hw_params = ssm4567_hw_params,
+ .digital_mute = ssm4567_mute,
+};
+
+static struct snd_soc_dai_driver ssm4567_dai = {
+ .name = "ssm4567-hifi",
+ .playback = {
+ .stream_name = "Playback",
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = SNDRV_PCM_RATE_8000_192000,
+ .formats = SSM4567_FORMATS,
+ },
+ .ops = &ssm4567_dai_ops,
+};
+
+static struct snd_soc_codec_driver ssm4567_codec_driver = {
+ .set_bias_level = ssm4567_set_bias_level,
+ .idle_bias_off = true,
+
+ .controls = ssm4567_snd_controls,
+ .num_controls = ARRAY_SIZE(ssm4567_snd_controls),
+ .dapm_widgets = ssm4567_dapm_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(ssm4567_dapm_widgets),
+ .dapm_routes = ssm4567_routes,
+ .num_dapm_routes = ARRAY_SIZE(ssm4567_routes),
+};
+
+static const struct regmap_config ssm4567_regmap_config = {
+ .val_bits = 8,
+ .reg_bits = 8,
+
+ .max_register = SSM4567_REG_SOFT_RESET,
+ .readable_reg = ssm4567_readable_reg,
+ .writeable_reg = ssm4567_writeable_reg,
+ .volatile_reg = ssm4567_volatile_reg,
+
+ .cache_type = REGCACHE_RBTREE,
+ .reg_defaults = ssm4567_reg_defaults,
+ .num_reg_defaults = ARRAY_SIZE(ssm4567_reg_defaults),
+};
+
+static int ssm4567_i2c_probe(struct i2c_client *i2c,
+ const struct i2c_device_id *id)
+{
+ struct ssm4567 *ssm4567;
+ int ret;
+
+ ssm4567 = devm_kzalloc(&i2c->dev, sizeof(*ssm4567), GFP_KERNEL);
+ if (ssm4567 == NULL)
+ return -ENOMEM;
+
+ i2c_set_clientdata(i2c, ssm4567);
+
+ ssm4567->regmap = devm_regmap_init_i2c(i2c, &ssm4567_regmap_config);
+ if (IS_ERR(ssm4567->regmap))
+ return PTR_ERR(ssm4567->regmap);
+
+ ret = regmap_write(ssm4567->regmap, SSM4567_REG_SOFT_RESET, 0x00);
+ if (ret)
+ return ret;
+
+ ret = ssm4567_set_power(ssm4567, false);
+ if (ret)
+ return ret;
+
+ return snd_soc_register_codec(&i2c->dev, &ssm4567_codec_driver,
+ &ssm4567_dai, 1);
+}
+
+static int ssm4567_i2c_remove(struct i2c_client *client)
+{
+ snd_soc_unregister_codec(&client->dev);
+ return 0;
+}
+
+static const struct i2c_device_id ssm4567_i2c_ids[] = {
+ { "ssm4567", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, ssm4567_i2c_ids);
+
+static struct i2c_driver ssm4567_driver = {
+ .driver = {
+ .name = "ssm4567",
+ .owner = THIS_MODULE,
+ },
+ .probe = ssm4567_i2c_probe,
+ .remove = ssm4567_i2c_remove,
+ .id_table = ssm4567_i2c_ids,
+};
+module_i2c_driver(ssm4567_driver);
+
+MODULE_DESCRIPTION("ASoC SSM4567 driver");
+MODULE_AUTHOR("Anatol Pomozov <anatol@chromium.org>");
+MODULE_LICENSE("GPL");
Analog Devices SSM4567 is a boost class-D audio amplifier. Signed-off-by: Anatol Pomozov <anatol.pomozov@gmail.com> --- .../devicetree/bindings/sound/ssm4567.txt | 15 + sound/soc/codecs/Kconfig | 4 + sound/soc/codecs/Makefile | 2 + sound/soc/codecs/ssm4567.c | 350 +++++++++++++++++++++ 4 files changed, 371 insertions(+) create mode 100644 Documentation/devicetree/bindings/sound/ssm4567.txt create mode 100644 sound/soc/codecs/ssm4567.c