[PATCH] ASoC: tas5805m: Add TAS5805M amplifier driver

From: Leslie Hsia(夏邦進_Pegatron)
Date: Tue May 05 2020 - 06:37:15 EST

From: Leslie Hsia <Leslie_Hsia@xxxxxxxxxxxxxxxx>

This is initial amplifier driver for TAS5805M.

Signed-off-by: Leslie Hsia <Leslie_Hsia@xxxxxxxxxxxxxxxx>
---
diff -uprN -X linux-4.15-vanilla/Documentation/dontdiff linux-4.15-vanilla/sound/soc/codecs/Kconfig linux-4.15/sound/soc/codecs/Kconfig
--- linux-4.15-vanilla/sound/soc/codecs/Kconfig 2020-03-12 21:21:05.179091822 +0800
+++ linux-4.15/sound/soc/codecs/Kconfig 2020-04-30 15:33:05.687598540 +0800
@@ -193,6 +193,7 @@ config SND_SOC_ALL_CODECS
select SND_SOC_TAS5086 if I2C
select SND_SOC_TAS571X if I2C
select SND_SOC_TAS5720 if I2C
+ select SND_SOC_TAS5805M if I2C
select SND_SOC_TAS6424 if I2C
select SND_SOC_TDA7419 if I2C
select SND_SOC_TFA9879 if I2C
@@ -1207,6 +1208,10 @@ config SND_SOC_TAS5086
tristate "Texas Instruments TAS5086 speaker amplifier"
depends on I2C

+config SND_SOC_TAS5805M
+ tristate "Texas Instruments TAS5805M Mono Audio amplifier"
+ depends on I2C
+
config SND_SOC_TAS571X
tristate "Texas Instruments TAS571x power amplifiers"
depends on I2C
diff -uprN -X linux-4.15-vanilla/Documentation/dontdiff linux-4.15-vanilla/sound/soc/codecs/Makefile linux-4.15/sound/soc/codecs/Makefile
--- linux-4.15-vanilla/sound/soc/codecs/Makefile 2020-03-12 21:21:05.179091822 +0800
+++ linux-4.15/sound/soc/codecs/Makefile 2020-04-30 15:33:09.975593688 +0800
@@ -294,6 +294,7 @@ snd-soc-simple-amplifier-objs := simple-
snd-soc-tpa6130a2-objs := tpa6130a2.o
snd-soc-tas2552-objs := tas2552.o
snd-soc-tas2562-objs := tas2562.o
+snd-soc-tas5805m-objs := tas5805m.o

obj-$(CONFIG_SND_SOC_88PM860X) += snd-soc-88pm860x.o
obj-$(CONFIG_SND_SOC_AB8500_CODEC) += snd-soc-ab8500-codec.o
@@ -499,6 +500,7 @@ obj-$(CONFIG_SND_SOC_STAC9766) += snd-so
obj-$(CONFIG_SND_SOC_STI_SAS) += snd-soc-sti-sas.o
obj-$(CONFIG_SND_SOC_TAS2552) += snd-soc-tas2552.o
obj-$(CONFIG_SND_SOC_TAS2562) += snd-soc-tas2562.o
+obj-$(CONFIG_SND_SOC_TAS5805M) += snd-soc-tas5805m.o
obj-$(CONFIG_SND_SOC_TAS5086) += snd-soc-tas5086.o
obj-$(CONFIG_SND_SOC_TAS571X) += snd-soc-tas571x.o
obj-$(CONFIG_SND_SOC_TAS5720) += snd-soc-tas5720.o
diff -uprN -X linux-4.15-vanilla/Documentation/dontdiff linux-4.15-vanilla/sound/soc/codecs/tas5805m.c linux-4.15/sound/soc/codecs/tas5805m.c
--- linux-4.15-vanilla/sound/soc/codecs/tas5805m.c 1970-01-01 08:00:00.000000000 +0800
+++ linux-4.15/sound/soc/codecs/tas5805m.c 2020-05-05 17:26:09.894332647 +0800
@@ -0,0 +1,264 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+//
+// tas5805m.c -- TAS5805M audio amplifier I2C driver
+//
+// Copyright (c) 2020 Pegatron Corp.
+//
+// Author: Leslie Hsia <Leslie_Hsia@xxxxxxxxxxxxxxxx>
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/slab.h>
+#include <linux/of.h>
+#include <linux/init.h>
+#include <linux/acpi.h>
+#include <linux/gpio.h>
+#include <linux/i2c.h>
+#include <sound/soc.h>
+#include <linux/regmap.h>
+#include <linux/types.h>
+
+#define TAS5805M_REG_DEV_RESET 0x00
+#define TAS5805M_REG_DEV_CTL2 0x03
+#define TAS5805M_REG_DEV_BOOK 0x7F
+#define TAS5805M_REG_VOL_CTL 0x4C
+#define TAS5805M_DEV_STAT_CTL_MSK (BIT(1) | BIT(0))
+#define TAS5805M_DEV_STAT_DSLEEP 0x00
+#define TAS5805M_DEV_STAT_SLEEP 0x01
+#define TAS5805M_DEV_STAT_HIZ 0x02
+#define TAS5805M_DEV_STAT_PLAY 0x03
+#define TAS5805M_DEV_STAT_RESET 0x00
+#define TAS5805M_DIG_VOL_DB 0x3D
+#define TAS5805M_DEV_BOOK_DEFAULT_PAGE 0x00
+#define TAS5805M_DRV_NAME "TAS5805M"
+#define TAS5805M_AMP_DEV_NAME "TAS5805M"
+
+enum ti_ampfilier_type {
+ TAS5805M,
+};
+
+struct tas5805m_priv {
+ struct regmap *regmap;
+ /* mutex for getting the mutex and release */
+ struct mutex lock;
+};
+
+const struct regmap_config tas5805m_regmap = {
+ .reg_bits = 8,
+ .val_bits = 8,
+ .cache_type = REGCACHE_RBTREE,
+};
+
+/* Initialize the TAS5805M and set the volume to -6.5db,
+ * and set it to Play mode.
+ */
+static const struct reg_sequence tas5805m_init_dsp[] = {
+ { TAS5805M_REG_DEV_CTL2, TAS5805M_DEV_STAT_DSLEEP },
+ { TAS5805M_REG_DEV_CTL2, TAS5805M_DEV_STAT_HIZ },
+ { TAS5805M_REG_DEV_CTL2, TAS5805M_DEV_STAT_DSLEEP },
+ /* set volume to -6.5dB */
+ { TAS5805M_REG_VOL_CTL, TAS5805M_DIG_VOL_DB },
+ { TAS5805M_REG_DEV_CTL2, TAS5805M_DEV_STAT_PLAY },
+};
+
+/* Setting the TAS5805M state and save the config in the default page. */
+static int tas5805m_set_device_state(struct tas5805m_priv *tas5805m,
+ int state)
+{
+ int ret = 0;
+
+ ret = regmap_write(tas5805m->regmap, TAS5805M_REG_DEV_RESET,
+ TAS5805M_DEV_STAT_RESET);
+ if (ret != 0)
+ return -EINVAL;
+
+ /* Saving the config to the default page of the default book */
+ ret = regmap_write(tas5805m->regmap,
+ TAS5805M_REG_DEV_BOOK,
+ TAS5805M_DEV_BOOK_DEFAULT_PAGE);
+ if (ret != 0)
+ return -EINVAL;
+
+ ret = regmap_write(tas5805m->regmap,
+ TAS5805M_REG_DEV_RESET,
+ TAS5805M_DEV_STAT_RESET);
+ if (ret != 0)
+ return -EINVAL;
+
+ ret = regmap_update_bits(tas5805m->regmap,
+ TAS5805M_REG_DEV_CTL2,
+ TAS5805M_DEV_STAT_CTL_MSK, state);
+ if (ret != 0)
+ return -EINVAL;
+
+ return ret;
+}
+
+/* Reset the TAS5805M and initialize TAS5805M again.*/
+static int tas5805m_reset(struct device *dev,
+ struct tas5805m_priv *priv)
+{
+ int ret = 0;
+
+ ret = tas5805m_set_device_state(priv, TAS5805M_DEV_STAT_DSLEEP);
+ if (ret != 0) {
+ dev_err(dev, "Failed to set TAS5805M to Deep Sleep state: %d\n",
+ ret);
+ return -EINVAL;
+ }
+
+ ret = tas5805m_set_device_state(priv, TAS5805M_DEV_STAT_HIZ);
+ if (ret != 0) {
+ dev_err(dev, "Failed to set TAS5805M to Hi-Z state: %d\n", ret);
+ return -EINVAL;
+ }
+
+ /* Load the settings */
+ ret = regmap_register_patch(priv->regmap,
+ tas5805m_init_dsp,
+ ARRAY_SIZE(tas5805m_init_dsp));
+ if (ret != 0) {
+ dev_err(dev, "Failed to initialize TAS5805M: %d\n", ret);
+ return -EINVAL;
+ }
+
+ return ret;
+}
+
+static int tas5805m_probe(struct device *dev, struct regmap *regmap)
+{
+ struct tas5805m_priv *tas5805m;
+
+ tas5805m = devm_kzalloc(dev, sizeof(struct tas5805m_priv), GFP_KERNEL);
+ if (!tas5805m)
+ return -ENOMEM;
+
+ dev_set_drvdata(dev, tas5805m);
+ tas5805m->regmap = regmap;
+
+ mutex_init(&tas5805m->lock);
+
+ tas5805m_reset(dev, tas5805m);
+
+ return 0;
+}
+
+static int tas5805m_i2c_probe(struct i2c_client *i2c,
+ const struct i2c_device_id *id)
+{
+ struct tas5805m_priv *priv;
+ struct device *dev = &i2c->dev;
+ struct regmap_config config = tas5805m_regmap;
+ int ret;
+
+ priv = devm_kzalloc(dev, sizeof(*priv), GFP_KERNEL);
+
+ if (!priv)
+ return -ENOMEM;
+
+ priv->regmap = devm_regmap_init_i2c(i2c, &config);
+
+ if (IS_ERR(priv->regmap)) {
+ ret = PTR_ERR(priv->regmap);
+ dev_err(&i2c->dev, "Failed to create regmap: %d\n", ret);
+ return ret;
+ }
+
+ i2c_set_clientdata(i2c, priv);
+
+ return tas5805m_probe(&i2c->dev, priv->regmap);
+}
+
+static int tas5805m_i2c_remove(struct i2c_client *i2c)
+{
+ return 0;
+}
+
+#ifdef CONFIG_ACPI
+static const struct acpi_device_id tas5805m_acpi_match[] = {
+ {"TXNM5805", TAS5805M},
+ { },
+};
+MODULE_DEVICE_TABLE(acpi, tas5805m_acpi_match);
+#else
+#define st_accel_acpi_match NULL
+#endif
+
+static const struct i2c_device_id tas5805m_i2c_id[] = {
+ { TAS5805M_AMP_DEV_NAME, TAS5805M },
+ {},
+};
+MODULE_DEVICE_TABLE(i2c, tas5805m_i2c_id);
+
+/* Shutdown procedures, configure the TAS5805M_REG_DEV_CTL2 register
+ * via i2c control port, and bring down power supplies.
+ */
+#ifdef CONFIG_PM_SLEEP
+static int tas5805m_dsp_power_suspend(struct device *dev)
+{
+ int ret;
+ struct tas5805m_priv *tas5805m;
+
+ tas5805m = dev_get_drvdata(dev);
+ if (!tas5805m)
+ return -ENOMEM;
+
+ mutex_lock(&tas5805m->lock);
+ ret = tas5805m_set_device_state(tas5805m, TAS5805M_DEV_STAT_HIZ);
+ if (ret != 0) {
+ dev_err(dev, "Failed to set TAS5805M to Hi-Z state: %d\n", ret);
+ return -EINVAL;
+ }
+
+ mutex_unlock(&tas5805m->lock);
+
+ return 0;
+}
+
+/* Startup procedures,
+ * configure the pin with proper settings for i2c device address,
+ * binre up power supplies, set the device into Hiz state
+ * and enable DSP via i2c control port,
+ * initialize the DSP coefficient, then set the device to Play mode
+ */
+static int tas5805m_dsp_power_resume(struct device *dev)
+{
+ struct tas5805m_priv *tas5805m;
+
+ tas5805m = dev_get_drvdata(dev);
+ if (!tas5805m)
+ return -ENOMEM;
+
+ mutex_lock(&tas5805m->lock);
+ tas5805m_reset(dev, tas5805m);
+ mutex_unlock(&tas5805m->lock);
+
+ return 0;
+}
+
+static const struct dev_pm_ops tas5805m_dsp_power_pm = {
+ .suspend = tas5805m_dsp_power_suspend,
+ .resume = tas5805m_dsp_power_resume,
+};
+#define tas5805m_dsp_power_pm_ops (&tas5805m_dsp_power_pm)
+#else
+#define tas5805m_dsp_power_pm_ops NULL
+#endif
+
+static struct i2c_driver tas5805m_i2c_driver = {
+ .driver = {
+ .name = TAS5805M_DRV_NAME,
+ .acpi_match_table = ACPI_PTR(tas5805m_acpi_match),
+ .pm = tas5805m_dsp_power_pm_ops,
+ },
+ .probe = tas5805m_i2c_probe,
+ .remove = tas5805m_i2c_remove,
+ .id_table = tas5805m_i2c_id,
+};
+
+module_i2c_driver(tas5805m_i2c_driver);
+
+MODULE_AUTHOR("Leslie Hsia <Leslie_Hsia@xxxxxxxxxxxxxxxx>");
+MODULE_AUTHOR("Andy Liu <andy-liu@xxxxxx>");
+MODULE_DESCRIPTION("TAS5805M Audio Amplifier I2C Driver");
+MODULE_LICENSE("GPL v2");


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