new file mode 100644
@@ -0,0 +1,20 @@
+Texas Instruments src4392 DT bindings
+
+SRC4392 is a digital audio codec that can be connected via
+I2C or SPI. Currently, only I2C bus is supported.
+
+Required properties:
+
+ - compatible: "ti,src4392"
+
+Required properties on I2C:
+
+ - reg: the I2C address
+
+Examples:
+
+ src4392@70 {
+ compatible = "ti,src4392";
+ reg = <0x70>;
+ #sound-dai-cells = <0>;
+ };
@@ -205,6 +205,7 @@ config SND_SOC_ALL_CODECS
imply SND_SOC_SIMPLE_AMPLIFIER
imply SND_SOC_SIMPLE_MUX
imply SND_SOC_SPDIF
+ imply SND_SOC_SRC4XXX_I2C
imply SND_SOC_SSM2305
imply SND_SOC_SSM2518
imply SND_SOC_SSM2602_SPI
@@ -1471,6 +1472,18 @@ config SND_SOC_SIMPLE_MUX
config SND_SOC_SPDIF
tristate "S/PDIF CODEC"
+config SND_SOC_SRC4XXX_I2C
+ tristate
+ depends on I2C
+ select SND_SOC_SRC4XXX
+
+config SND_SOC_SRC4XXX
+ tristate "Texas Instruments SRC4XXX DIR/DIT and SRC codecs"
+ help
+ Enable support for the TI SRC4XXX family of codecs. These include the
+ scr4392 which has digital receivers, transmitters, and
+ a sample rate converter, including numerous ports.
+
config SND_SOC_SSM2305
tristate "Analog Devices SSM2305 Class-D Amplifier"
help
@@ -231,6 +231,8 @@ snd-soc-sigmadsp-regmap-objs := sigmadsp-regmap.o
snd-soc-si476x-objs := si476x.o
snd-soc-spdif-tx-objs := spdif_transmitter.o
snd-soc-spdif-rx-objs := spdif_receiver.o
+snd-soc-src4xxx-objs := src4xxx.o
+snd-soc-src4xxx-i2c-objs := src4xxx-i2c.o
snd-soc-ssm2305-objs := ssm2305.o
snd-soc-ssm2518-objs := ssm2518.o
snd-soc-ssm2602-objs := ssm2602.o
@@ -579,6 +581,8 @@ obj-$(CONFIG_SND_SOC_SIGMADSP_I2C) += snd-soc-sigmadsp-i2c.o
obj-$(CONFIG_SND_SOC_SIGMADSP_REGMAP) += snd-soc-sigmadsp-regmap.o
obj-$(CONFIG_SND_SOC_SI476X) += snd-soc-si476x.o
obj-$(CONFIG_SND_SOC_SPDIF) += snd-soc-spdif-rx.o snd-soc-spdif-tx.o
+obj-$(CONFIG_SND_SOC_SRC4XXX) += snd-soc-src4xxx.o
+obj-$(CONFIG_SND_SOC_SRC4XXX_I2C) += snd-soc-src4xxx-i2c.o
obj-$(CONFIG_SND_SOC_SSM2305) += snd-soc-ssm2305.o
obj-$(CONFIG_SND_SOC_SSM2518) += snd-soc-ssm2518.o
obj-$(CONFIG_SND_SOC_SSM2602) += snd-soc-ssm2602.o
new file mode 100644
@@ -0,0 +1,55 @@
+/* SPDX-License-Identifier: GPL-2.0
+ *
+ * Driver for SRC4XXX codecs
+ *
+ * Copyright 2021-2022 Deqx Pty Ltd
+ * Author: Matt Flax <flatmax@flatmax.com>
+ */
+
+#include <linux/i2c.h>
+#include <linux/mod_devicetable.h>
+#include <linux/module.h>
+#include <linux/regmap.h>
+
+#include "src4xxx.h"
+
+static int src4xxx_i2c_probe(struct i2c_client *i2c,
+ const struct i2c_device_id *id)
+{
+ return src4xxx_probe(&i2c->dev,
+ devm_regmap_init_i2c(i2c, &src4xxx_regmap_config), NULL);
+}
+
+static int src4xxx_i2c_remove(struct i2c_client *i2c)
+{
+ src4xxx_remove(&i2c->dev);
+ return 0;
+}
+
+static const struct i2c_device_id src4xxx_i2c_ids[] = {
+ { "src4392", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, src4xxx_i2c_ids);
+
+static const struct of_device_id src4xxx_of_match[] = {
+ { .compatible = "ti,src4392", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, src4xxx_of_match);
+
+
+static struct i2c_driver src4xxx_i2c_driver = {
+ .driver = {
+ .name = "src4xxx",
+ .of_match_table = of_match_ptr(src4xxx_of_match),
+ },
+ .probe = src4xxx_i2c_probe,
+ .remove = src4xxx_i2c_remove,
+ .id_table = src4xxx_i2c_ids,
+};
+module_i2c_driver(src4xxx_i2c_driver);
+
+MODULE_DESCRIPTION("ASoC SRC4392 CODEC I2C driver");
+MODULE_AUTHOR("Matt Flax <flatmax@flatmax.com>");
+MODULE_LICENSE("GPL");
new file mode 100644
@@ -0,0 +1,508 @@
+/* SPDX-License-Identifier: GPL-2.0
+ *
+ * TI SRC4xxx Audio Codec driver
+ *
+ * Copyright 2021-2022 Deqx Pty Ltd
+ * Author: Matt Flax <flatmax@flatmax.com>
+ */
+
+#include <linux/module.h>
+
+#include <sound/soc.h>
+#include <sound/tlv.h>
+
+#include "src4xxx.h"
+
+struct src4xxx {
+ struct regmap *regmap;
+ bool master[2];
+ int mclk_hz;
+ struct device *dev;
+};
+
+enum {SRC4XXX_PORTA, SRC4XXX_PORTB};
+
+/* SRC attenuation */
+static const DECLARE_TLV_DB_SCALE(src_tlv, -12750, 50, 0);
+
+static const struct snd_kcontrol_new src4xxx_controls[] = {
+ SOC_DOUBLE_R_TLV("SRC vol",
+ SRC4XXX_SCR_CTL_30, SRC4XXX_SCR_CTL_31, 0, 255, 1, src_tlv),
+};
+
+/* I2S port control */
+static const char * const port_out_src_text[] = {
+ "loopback", "other_port", "DIR", "SRC"
+};
+static SOC_ENUM_SINGLE_DECL(porta_out_src_enum, SRC4XXX_PORTA_CTL_03, 4,
+ port_out_src_text);
+static SOC_ENUM_SINGLE_DECL(portb_out_src_enum, SRC4XXX_PORTB_CTL_05, 4,
+ port_out_src_text);
+static const struct snd_kcontrol_new porta_out_control =
+ SOC_DAPM_ENUM("Port A source select", porta_out_src_enum);
+static const struct snd_kcontrol_new portb_out_control =
+ SOC_DAPM_ENUM("Port B source select", portb_out_src_enum);
+
+/* Digital audio transmitter control */
+static const char * const dit_mux_text[] = {"Port A", "Port B", "DIR", "SRC"};
+static SOC_ENUM_SINGLE_DECL(dit_mux_enum, SRC4XXX_TX_CTL_07, 3, dit_mux_text);
+static const struct snd_kcontrol_new dit_mux_control =
+ SOC_DAPM_ENUM("DIT source", dit_mux_enum);
+
+/* SRC control */
+static const char * const src_in_text[] = {"Port A", "Port B", "DIR"};
+static SOC_ENUM_SINGLE_DECL(src_in_enum, SRC4XXX_SCR_CTL_2D, 0, src_in_text);
+static const struct snd_kcontrol_new src_in_control =
+ SOC_DAPM_ENUM("SRC source select", src_in_enum);
+
+/* DIR control */
+static const char * const dir_in_text[] = {"Ch 1", "Ch 2", "Ch 3", "Ch 4"};
+static SOC_ENUM_SINGLE_DECL(dir_in_enum, SRC4XXX_RCV_CTL_0D, 0, dir_in_text);
+static const struct snd_kcontrol_new dir_in_control =
+ SOC_DAPM_ENUM("Digital Input", dir_in_enum);
+
+static const struct snd_soc_dapm_widget src4xxx_dapm_widgets[] = {
+ SND_SOC_DAPM_INPUT("loopback_A"),
+ SND_SOC_DAPM_INPUT("other_port_A"),
+ SND_SOC_DAPM_INPUT("DIR_A"),
+ SND_SOC_DAPM_INPUT("SRC_A"),
+ SND_SOC_DAPM_MUX("Port A source",
+ SND_SOC_NOPM, 0, 0, &porta_out_control),
+
+ SND_SOC_DAPM_INPUT("loopback_B"),
+ SND_SOC_DAPM_INPUT("other_port_B"),
+ SND_SOC_DAPM_INPUT("DIR_B"),
+ SND_SOC_DAPM_INPUT("SRC_B"),
+ SND_SOC_DAPM_MUX("Port B source",
+ SND_SOC_NOPM, 0, 0, &portb_out_control),
+
+ SND_SOC_DAPM_INPUT("Port_A"),
+ SND_SOC_DAPM_INPUT("Port_B"),
+ SND_SOC_DAPM_INPUT("DIR_"),
+
+ /* Digital audio receivers and transmitters */
+ SND_SOC_DAPM_OUTPUT("DIR_OUT"),
+ SND_SOC_DAPM_OUTPUT("SRC_OUT"),
+ SND_SOC_DAPM_MUX("DIT Out Src", SRC4XXX_PWR_RST_01,
+ SRC4XXX_ENABLE_DIT_SHIFT, 1, &dit_mux_control),
+
+ /* Audio Interface */
+ SND_SOC_DAPM_AIF_IN("AIF_A_RX", "Playback A", 0,
+ SRC4XXX_PWR_RST_01, SRC4XXX_ENABLE_PORT_A_SHIFT, 1),
+ SND_SOC_DAPM_AIF_OUT("AIF_A_TX", "Capture A", 0,
+ SRC4XXX_PWR_RST_01, SRC4XXX_ENABLE_PORT_A_SHIFT, 1),
+ SND_SOC_DAPM_AIF_IN("AIF_B_RX", "Playback B", 0,
+ SRC4XXX_PWR_RST_01, SRC4XXX_ENABLE_PORT_B_SHIFT, 1),
+ SND_SOC_DAPM_AIF_OUT("AIF_B_TX", "Capture B", 0,
+ SRC4XXX_PWR_RST_01, SRC4XXX_ENABLE_PORT_B_SHIFT, 1),
+
+ SND_SOC_DAPM_MUX("SRC source", SND_SOC_NOPM, 0, 0, &src_in_control),
+
+ SND_SOC_DAPM_INPUT("MCLK"),
+ SND_SOC_DAPM_INPUT("RXMCLKI"),
+ SND_SOC_DAPM_INPUT("RXMCLKO"),
+
+ SND_SOC_DAPM_INPUT("RX1"),
+ SND_SOC_DAPM_INPUT("RX2"),
+ SND_SOC_DAPM_INPUT("RX3"),
+ SND_SOC_DAPM_INPUT("RX4"),
+ SND_SOC_DAPM_MUX("Digital Input", SRC4XXX_PWR_RST_01,
+ SRC4XXX_ENABLE_DIR_SHIFT, 1, &dir_in_control),
+};
+
+static const struct snd_soc_dapm_route src4xxx_audio_routes[] = {
+ /* I2S Input to Output Routing */
+ {"Port A source", "loopback", "loopback_A"},
+ {"Port A source", "other_port", "other_port_A"},
+ {"Port A source", "DIR", "DIR_A"},
+ {"Port A source", "SRC", "SRC_A"},
+ {"Port B source", "loopback", "loopback_B"},
+ {"Port B source", "other_port", "other_port_B"},
+ {"Port B source", "DIR", "DIR_B"},
+ {"Port B source", "SRC", "SRC_B"},
+ /* DIT muxing */
+ {"DIT Out Src", "Port A", "Capture A"},
+ {"DIT Out Src", "Port B", "Capture B"},
+ {"DIT Out Src", "DIR", "DIR_OUT"},
+ {"DIT Out Src", "SRC", "SRC_OUT"},
+
+ /* SRC input selection */
+ {"SRC source", "Port A", "Port_A"},
+ {"SRC source", "Port B", "Port_B"},
+ {"SRC source", "DIR", "DIR_"},
+ /* SRC mclk selection */
+ {"SRC mclk source", "Master (MCLK)", "MCLK"},
+ {"SRC mclk source", "Master (RXCLKI)", "RXMCLKI"},
+ {"SRC mclk source", "Recovered receiver clk", "RXMCLKO"},
+ /* DIR input selection */
+ {"Digital Input", "Ch 1", "RX1"},
+ {"Digital Input", "Ch 2", "RX2"},
+ {"Digital Input", "Ch 3", "RX3"},
+ {"Digital Input", "Ch 4", "RX4"},
+};
+
+
+static const struct snd_soc_component_driver src4xxx_driver = {
+ .controls = src4xxx_controls,
+ .num_controls = ARRAY_SIZE(src4xxx_controls),
+
+ .dapm_widgets = src4xxx_dapm_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(src4xxx_dapm_widgets),
+ .dapm_routes = src4xxx_audio_routes,
+ .num_dapm_routes = ARRAY_SIZE(src4xxx_audio_routes),
+};
+
+static int src4xxx_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)
+{
+ struct snd_soc_component *component = dai->component;
+ struct src4xxx *src4xxx = snd_soc_component_get_drvdata(component);
+ unsigned int ctrl;
+
+ switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+ case SND_SOC_DAIFMT_CBM_CFM:
+ ctrl = SRC4XXX_BUS_MASTER;
+ src4xxx->master[dai->id] = true;
+ break;
+ case SND_SOC_DAIFMT_CBS_CFS:
+ ctrl = 0;
+ src4xxx->master[dai->id] = false;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+ case SND_SOC_DAIFMT_I2S:
+ ctrl |= SRC4XXX_BUS_I2S;
+ break;
+ case SND_SOC_DAIFMT_LEFT_J:
+ ctrl |= SRC4XXX_BUS_LEFT_J;
+ break;
+ case SND_SOC_DAIFMT_RIGHT_J:
+ ctrl |= SRC4XXX_BUS_RIGHT_J_24;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+ case SND_SOC_DAIFMT_NB_NF:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ regmap_update_bits(src4xxx->regmap, SRC4XXX_BUS_FMT(dai->id),
+ SRC4XXX_BUS_FMT_MS_MASK, ctrl);
+
+ return 0;
+}
+
+static int src4xxx_set_mclk_hz(struct snd_soc_dai *codec_dai,
+ int clk_id, unsigned int freq, int dir)
+{
+ struct snd_soc_component *component = codec_dai->component;
+ struct src4xxx *src4xxx = snd_soc_component_get_drvdata(component);
+
+ dev_info(component->dev, "changing mclk rate from %d to %d Hz\n",
+ src4xxx->mclk_hz, freq);
+ src4xxx->mclk_hz = freq;
+
+ return 0;
+}
+
+static int src4xxx_hw_params(struct snd_pcm_substream *substream,
+ struct snd_pcm_hw_params *params,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_component *component = dai->component;
+ struct src4xxx *src4xxx = snd_soc_component_get_drvdata(component);
+ unsigned int mclk_div;
+ int val, pj, jd, d;
+ int reg;
+ int ret;
+
+ switch (dai->id) {
+ case SRC4XXX_PORTB:
+ reg = SRC4XXX_PORTB_CTL_06;
+ break;
+ default:
+ reg = SRC4XXX_PORTA_CTL_04;
+ }
+
+ if (src4xxx->master[dai->id]) {
+ mclk_div = src4xxx->mclk_hz/params_rate(params);
+ if (src4xxx->mclk_hz != mclk_div*params_rate(params)) {
+ dev_err(component->dev,
+ "mclk %d / rate %d has a remainder.\n",
+ src4xxx->mclk_hz, params_rate(params));
+ return -EINVAL;
+ }
+
+ val = ((int)mclk_div - 128) / 128;
+ if ((val < 0) | (val > 3)) {
+ dev_err(component->dev,
+ "div register setting %d is out of range\n",
+ val);
+ dev_err(component->dev,
+ "unsupported sample rate %d Hz for the master clock of %d Hz\n",
+ params_rate(params), src4xxx->mclk_hz);
+ return -EINVAL;
+ }
+
+ /* set the TX DIV */
+ ret = regmap_update_bits(src4xxx->regmap,
+ SRC4XXX_TX_CTL_07, SRC4XXX_TX_MCLK_DIV_MASK,
+ val<<SRC4XXX_TX_MCLK_DIV_SHIFT);
+ if (ret) {
+ dev_err(component->dev,
+ "Couldn't set the TX's div register to %d << %d = 0x%x\n",
+ val, SRC4XXX_TX_MCLK_DIV_SHIFT,
+ val<<SRC4XXX_TX_MCLK_DIV_SHIFT);
+ return ret;
+ }
+
+ /* set the PLL for the digital receiver */
+ switch (src4xxx->mclk_hz) {
+ case 24576000:
+ pj = 0x22;
+ jd = 0x00;
+ d = 0x00;
+ break;
+ case 22579200:
+ pj = 0x22;
+ jd = 0x1b;
+ d = 0xa3;
+ break;
+ default:
+ /* don't error out here,
+ * other parts of the chip are still functional
+ */
+ dev_info(component->dev,
+ "Couldn't set the RCV PLL as this master clock rate is unknown\n");
+ }
+ ret = regmap_write(src4xxx->regmap, SRC4XXX_RCV_PLL_0F, pj);
+ if (ret < 0)
+ dev_err(component->dev,
+ "Failed to update PLL register 0x%x\n",
+ SRC4XXX_RCV_PLL_0F);
+ ret = regmap_write(src4xxx->regmap, SRC4XXX_RCV_PLL_10, jd);
+ if (ret < 0)
+ dev_err(component->dev,
+ "Failed to update PLL register 0x%x\n",
+ SRC4XXX_RCV_PLL_10);
+ ret = regmap_write(src4xxx->regmap, SRC4XXX_RCV_PLL_11, d);
+ if (ret < 0)
+ dev_err(component->dev,
+ "Failed to update PLL register 0x%x\n",
+ SRC4XXX_RCV_PLL_11);
+
+ ret = regmap_update_bits(src4xxx->regmap,
+ SRC4XXX_TX_CTL_07, SRC4XXX_TX_MCLK_DIV_MASK,
+ val<<SRC4XXX_TX_MCLK_DIV_SHIFT);
+ if (ret < 0) {
+ dev_err(component->dev,
+ "Couldn't set the TX's div register to %d << %d = 0x%x\n",
+ val, SRC4XXX_TX_MCLK_DIV_SHIFT,
+ val<<SRC4XXX_TX_MCLK_DIV_SHIFT);
+ return ret;
+ }
+
+ return regmap_update_bits(src4xxx->regmap, reg,
+ SRC4XXX_MCLK_DIV_MASK, val);
+ } else
+ dev_info(dai->dev, "not setting up MCLK as not master\n");
+
+ return 0;
+};
+
+static const struct snd_soc_dai_ops src4xxx_dai_ops = {
+ .hw_params = src4xxx_hw_params,
+ .set_sysclk = src4xxx_set_mclk_hz,
+ .set_fmt = src4xxx_set_dai_fmt,
+};
+
+#define SRC4XXX_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S32_LE)
+#define SRC4XXX_RATES (SNDRV_PCM_RATE_44100|SNDRV_PCM_RATE_48000|\
+ SNDRV_PCM_RATE_88200|\
+ SNDRV_PCM_RATE_96000|\
+ SNDRV_PCM_RATE_176400|\
+ SNDRV_PCM_RATE_192000)
+
+static struct snd_soc_dai_driver src4xxx_dai_driver[] = {
+ {
+ .id = SRC4XXX_PORTA,
+ .name = "src4xxx-portA",
+ .playback = {
+ .stream_name = "Playback A",
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = SRC4XXX_RATES,
+ .formats = SRC4XXX_FORMATS,
+ },
+ .capture = {
+ .stream_name = "Capture A",
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = SRC4XXX_RATES,
+ .formats = SRC4XXX_FORMATS,
+ },
+ .ops = &src4xxx_dai_ops,
+ },
+ {
+ .id = SRC4XXX_PORTB,
+ .name = "src4xxx-portB",
+ .playback = {
+ .stream_name = "Playback B",
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = SRC4XXX_RATES,
+ .formats = SRC4XXX_FORMATS,
+ },
+ .capture = {
+ .stream_name = "Capture B",
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = SRC4XXX_RATES,
+ .formats = SRC4XXX_FORMATS,
+ },
+ .ops = &src4xxx_dai_ops,
+ },
+};
+
+static const struct reg_default src4xxx_reg_defaults[] = {
+ { SRC4XXX_PWR_RST_01, 0x00 }, /* all powered down intially */
+ { SRC4XXX_PORTA_CTL_03, 0x00 },
+ { SRC4XXX_PORTA_CTL_04, 0x00 },
+ { SRC4XXX_PORTB_CTL_05, 0x00 },
+ { SRC4XXX_PORTB_CTL_06, 0x00 },
+ { SRC4XXX_TX_CTL_07, 0x00 },
+ { SRC4XXX_TX_CTL_08, 0x00 },
+ { SRC4XXX_TX_CTL_09, 0x00 },
+ { SRC4XXX_SRC_DIT_IRQ_MSK_0B, 0x00 },
+ { SRC4XXX_SRC_DIT_IRQ_MODE_0C, 0x00 },
+ { SRC4XXX_RCV_CTL_0D, 0x00 },
+ { SRC4XXX_RCV_CTL_0E, 0x00 },
+ { SRC4XXX_RCV_PLL_0F, 0x00 }, /* not spec. in the datasheet */
+ { SRC4XXX_RCV_PLL_10, 0xff }, /* not spec. in the datasheet */
+ { SRC4XXX_RCV_PLL_11, 0xff }, /* not spec. in the datasheet */
+ { SRC4XXX_RVC_IRQ_MSK_16, 0x00 },
+ { SRC4XXX_RVC_IRQ_MSK_17, 0x00 },
+ { SRC4XXX_RVC_IRQ_MODE_18, 0x00 },
+ { SRC4XXX_RVC_IRQ_MODE_19, 0x00 },
+ { SRC4XXX_RVC_IRQ_MODE_1A, 0x00 },
+ { SRC4XXX_GPIO_1_1B, 0x00 },
+ { SRC4XXX_GPIO_2_1C, 0x00 },
+ { SRC4XXX_GPIO_3_1D, 0x00 },
+ { SRC4XXX_GPIO_4_1E, 0x00 },
+ { SRC4XXX_SCR_CTL_2D, 0x00 },
+ { SRC4XXX_SCR_CTL_2E, 0x00 },
+ { SRC4XXX_SCR_CTL_2F, 0x00 },
+ { SRC4XXX_SCR_CTL_30, 0x00 },
+ { SRC4XXX_SCR_CTL_31, 0x00 },
+};
+
+int src4xxx_probe(struct device *dev, struct regmap *regmap,
+ void (*switch_mode)(struct device *dev))
+{
+ struct src4xxx *src4xxx;
+ int ret;
+
+ if (IS_ERR(regmap))
+ return PTR_ERR(regmap);
+
+ src4xxx = devm_kzalloc(dev, sizeof(*src4xxx), GFP_KERNEL);
+ if (!src4xxx)
+ return -ENOMEM;
+
+ src4xxx->regmap = regmap;
+ src4xxx->dev = dev;
+ src4xxx->mclk_hz = 0; /* mclk has not been configured yet */
+ dev_set_drvdata(dev, src4xxx);
+
+ ret = regmap_write(regmap, SRC4XXX_PWR_RST_01, SRC4XXX_RESET);
+ if (ret < 0)
+ dev_err(dev, "Failed to issue reset: %d\n", ret);
+ usleep_range(1, 500); /* sleep for more then 500 ns */
+ ret = regmap_write(regmap, SRC4XXX_PWR_RST_01, SRC4XXX_POWER_DOWN);
+ if (ret < 0)
+ dev_err(dev, "Failed to decommission reset: %d\n", ret);
+ usleep_range(500, 1000); /* sleep for 500 us or more */
+
+ ret = regmap_update_bits(src4xxx->regmap, SRC4XXX_PWR_RST_01,
+ SRC4XXX_POWER_ENABLE, SRC4XXX_POWER_ENABLE);
+ if (ret < 0)
+ dev_err(dev, "Failed to port A and B : %d\n", ret);
+
+ /* set receiver to use master clock (rcv mclk is most likely jittery) */
+ ret = regmap_update_bits(src4xxx->regmap, SRC4XXX_RCV_CTL_0D,
+ SRC4XXX_RXCLK_MCLK, SRC4XXX_RXCLK_MCLK);
+ if (ret < 0)
+ dev_err(dev,
+ "Failed to enable mclk as the PLL1 DIR reference : %d\n", ret);
+
+ /* default to leaving the PLL2 running on loss of lock, divide by 8 */
+ ret = regmap_update_bits(src4xxx->regmap, SRC4XXX_RCV_CTL_0E,
+ SRC4XXX_PLL2_DIV_8 | SRC4XXX_REC_MCLK_EN | SRC4XXX_PLL2_LOL,
+ SRC4XXX_PLL2_DIV_8 | SRC4XXX_REC_MCLK_EN | SRC4XXX_PLL2_LOL);
+ if (ret < 0)
+ dev_err(dev, "Failed to enable mclk rec and div : %d\n", ret);
+
+ ret = devm_snd_soc_register_component(dev, &src4xxx_driver,
+ src4xxx_dai_driver, ARRAY_SIZE(src4xxx_dai_driver));
+ if (ret == 0)
+ dev_info(dev, "src4392 probe ok %d\n", ret);
+ return ret;
+}
+EXPORT_SYMBOL_GPL(src4xxx_probe);
+
+static bool src4xxx_volatile_register(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case SRC4XXX_RES_00:
+ case SRC4XXX_GLOBAL_ITR_STS_02:
+ case SRC4XXX_SRC_DIT_STS_0A:
+ case SRC4XXX_NON_AUDIO_D_12:
+ case SRC4XXX_RVC_STS_13:
+ case SRC4XXX_RVC_STS_14:
+ case SRC4XXX_RVC_STS_15:
+ case SRC4XXX_SUB_CODE_1F:
+ case SRC4XXX_SUB_CODE_20:
+ case SRC4XXX_SUB_CODE_21:
+ case SRC4XXX_SUB_CODE_22:
+ case SRC4XXX_SUB_CODE_23:
+ case SRC4XXX_SUB_CODE_24:
+ case SRC4XXX_SUB_CODE_25:
+ case SRC4XXX_SUB_CODE_26:
+ case SRC4XXX_SUB_CODE_27:
+ case SRC4XXX_SUB_CODE_28:
+ case SRC4XXX_PC_PREAMBLE_HI_29:
+ case SRC4XXX_PC_PREAMBLE_LO_2A:
+ case SRC4XXX_PD_PREAMBLE_HI_2B:
+ case SRC4XXX_PC_PREAMBLE_LO_2C:
+ case SRC4XXX_IO_RATIO_32:
+ case SRC4XXX_IO_RATIO_33:
+ return true;
+ }
+
+ if (reg > SRC4XXX_IO_RATIO_33 && reg < SRC4XXX_PAGE_SEL_7F)
+ return true;
+
+ return false;
+}
+
+const struct regmap_config src4xxx_regmap_config = {
+ .val_bits = 8,
+ .reg_bits = 8,
+ .max_register = SRC4XXX_IO_RATIO_33,
+
+ .reg_defaults = src4xxx_reg_defaults,
+ .num_reg_defaults = ARRAY_SIZE(src4xxx_reg_defaults),
+ .volatile_reg = src4xxx_volatile_register,
+ .cache_type = REGCACHE_RBTREE,
+};
+EXPORT_SYMBOL_GPL(src4xxx_regmap_config);
+
+MODULE_DESCRIPTION("ASoC SRC4XXX CODEC driver");
+MODULE_AUTHOR("Matt Flax <flatmax@flatmax.com>");
+MODULE_LICENSE("GPL");
new file mode 100644
@@ -0,0 +1,115 @@
+/* SPDX-License-Identifier: GPL-2.0
+ *
+ * src4xxx.h -- SRC4XXX ALSA SoC audio driver
+ *
+ * Copyright 2021-2022 Deqx Pty Ltd
+ * Author: Matt R Flax <flatmax@flatmax.com>
+ */
+
+#ifndef __SRC4XXX_H__
+#define __SRC4XXX_H__
+
+#define SRC4XXX_RES_00 0x00
+#define SRC4XXX_PWR_RST_01 0x01
+#define SRC4XXX_RESET 0x80
+#define SRC4XXX_POWER_DOWN 0x00
+#define SRC4XXX_POWER_ENABLE 0x20
+#define SRC4XXX_ENABLE_SRC 0x1
+#define SRC4XXX_ENABLE_SRC_SHIFT 0
+#define SRC4XXX_ENABLE_DIR 0x2
+#define SRC4XXX_ENABLE_DIR_SHIFT 1
+#define SRC4XXX_ENABLE_DIT 0x4
+#define SRC4XXX_ENABLE_DIT_SHIFT 2
+#define SRC4XXX_ENABLE_PORT_B 0x8
+#define SRC4XXX_ENABLE_PORT_B_SHIFT 3
+#define SRC4XXX_ENABLE_PORT_A 0x10
+#define SRC4XXX_ENABLE_PORT_A_SHIFT 4
+
+#define SRC4XXX_PORTA_CTL_03 0x03
+#define SRC4XXX_BUS_MASTER 0x8
+#define SRC4XXX_BUS_LEFT_J 0x0
+#define SRC4XXX_BUS_I2S 0x1
+#define SRC4XXX_BUS_RIGHT_J_16 0x4
+#define SRC4XXX_BUS_RIGHT_J_18 0x5
+#define SRC4XXX_BUS_RIGHT_J_20 0x6
+#define SRC4XXX_BUS_RIGHT_J_24 0x7
+#define SRC4XXX_BUS_FMT_MS_MASK 0xf
+
+#define SRC4XXX_PORTA_CTL_04 0x04
+#define SRC4XXX_MCLK_DIV_MASK 0x3
+
+#define SRC4XXX_BUS_FMT(id) (SRC4XXX_PORTA_CTL_03+2*id)
+#define SRC4XXX_BUS_CLK(id) (SRC4XXX_PORTA_CTL_04+2*id)
+
+#define SRC4XXX_PORTB_CTL_05 0x05
+#define SRC4XXX_PORTB_CTL_06 0x06
+
+#define SRC4XXX_TX_CTL_07 0x07
+#define SRC4XXX_TX_MCLK_DIV_MASK 0x60
+#define SRC4XXX_TX_MCLK_DIV_SHIFT 5
+
+#define SRC4XXX_TX_CTL_08 0x08
+#define SRC4XXX_TX_CTL_09 0x09
+#define SRC4XXX_SRC_DIT_IRQ_MSK_0B 0x0B
+#define SRC4XXX_SRC_BTI_EN 0x01
+#define SRC4XXX_SRC_TSLIP_EN 0x02
+#define SRC4XXX_SRC_DIT_IRQ_MODE_0C 0x0C
+#define SRC4XXX_RCV_CTL_0D 0x0D
+#define SRC4XXX_RXCLK_RXCKI 0x0
+#define SRC4XXX_RXCLK_MCLK 0x8
+#define SRC4XXX_RCV_CTL_0E 0x0E
+#define SRC4XXX_REC_MCLK_EN 0x1
+#define SRC4XXX_PLL2_DIV_0 (0x0<<1)
+#define SRC4XXX_PLL2_DIV_2 (0x1<<1)
+#define SRC4XXX_PLL2_DIV_4 (0x2<<1)
+#define SRC4XXX_PLL2_DIV_8 (0x3<<1)
+#define SRC4XXX_PLL2_LOL 0x8
+#define SRC4XXX_RCV_PLL_0F 0x0F
+#define SRC4XXX_RCV_PLL_10 0x10
+#define SRC4XXX_RCV_PLL_11 0x11
+#define SRC4XXX_RVC_IRQ_MSK_16 0x16
+#define SRC4XXX_RVC_IRQ_MSK_17 0x17
+#define SRC4XXX_RVC_IRQ_MODE_18 0x18
+#define SRC4XXX_RVC_IRQ_MODE_19 0x19
+#define SRC4XXX_RVC_IRQ_MODE_1A 0x1A
+#define SRC4XXX_GPIO_1_1B 0x1B
+#define SRC4XXX_GPIO_2_1C 0x1C
+#define SRC4XXX_GPIO_3_1D 0x1D
+#define SRC4XXX_GPIO_4_1E 0x1E
+#define SRC4XXX_SCR_CTL_2D 0x2D
+#define SRC4XXX_SCR_CTL_2E 0x2E
+#define SRC4XXX_SCR_CTL_2F 0x2F
+#define SRC4XXX_SCR_CTL_30 0x30
+#define SRC4XXX_SCR_CTL_31 0x31
+#define SRC4XXX_PAGE_SEL_7F 0x7F
+
+// read only registers
+#define SRC4XXX_GLOBAL_ITR_STS_02 0x02
+#define SRC4XXX_SRC_DIT_STS_0A 0x0A
+#define SRC4XXX_NON_AUDIO_D_12 0x12
+#define SRC4XXX_RVC_STS_13 0x13
+#define SRC4XXX_RVC_STS_14 0x14
+#define SRC4XXX_RVC_STS_15 0x15
+#define SRC4XXX_SUB_CODE_1F 0x1F
+#define SRC4XXX_SUB_CODE_20 0x20
+#define SRC4XXX_SUB_CODE_21 0x21
+#define SRC4XXX_SUB_CODE_22 0x22
+#define SRC4XXX_SUB_CODE_23 0x23
+#define SRC4XXX_SUB_CODE_24 0x24
+#define SRC4XXX_SUB_CODE_25 0x25
+#define SRC4XXX_SUB_CODE_26 0x26
+#define SRC4XXX_SUB_CODE_27 0x27
+#define SRC4XXX_SUB_CODE_28 0x28
+#define SRC4XXX_PC_PREAMBLE_HI_29 0x29
+#define SRC4XXX_PC_PREAMBLE_LO_2A 0x2A
+#define SRC4XXX_PD_PREAMBLE_HI_2B 0x2B
+#define SRC4XXX_PC_PREAMBLE_LO_2C 0x2C
+#define SRC4XXX_IO_RATIO_32 0x32
+#define SRC4XXX_IO_RATIO_33 0x33
+
+int src4xxx_probe(struct device *dev, struct regmap *regmap,
+ void (*switch_mode)(struct device *dev));
+void src4xxx_remove(struct device *dev);
+extern const struct regmap_config src4xxx_regmap_config;
+
+#endif /* __SRC4XXX_H__ */
The src4xxx keyword is used for future capability to integrate other codecs similar to the src4392 to the same code base. Signed-off-by: Matt Flax <flatmax@flatmax.com> --- Notes: V2 changes : * Fixed indents in Kconfig * Comment header of source code is now one block * Documented the devicetree binding * sample rate converter MCLK src is non-user settable * hushed spurious dev_info output * src4xxx_remove was empty is removed. * Using switch in hw_params to select port reg. for clarity * Removed interrupt reg. settings - will re-intro. properly later * probe function is now EXPORT_SYMBOL_GPL .../devicetree/bindings/sound/src4xxx.txt | 20 + sound/soc/codecs/Kconfig | 13 + sound/soc/codecs/Makefile | 4 + sound/soc/codecs/src4xxx-i2c.c | 55 ++ sound/soc/codecs/src4xxx.c | 508 ++++++++++++++++++ sound/soc/codecs/src4xxx.h | 115 ++++ 6 files changed, 715 insertions(+) create mode 100644 Documentation/devicetree/bindings/sound/src4xxx.txt create mode 100644 sound/soc/codecs/src4xxx-i2c.c create mode 100644 sound/soc/codecs/src4xxx.c create mode 100644 sound/soc/codecs/src4xxx.h