[alsa-devel] [PATCH RFC 3/6] ASoC: max98504: Add max98504 speaker amplifier driver
Sylwester Nawrocki
s.nawrocki at samsung.com
Mon Jun 13 12:52:37 CEST 2016
This patch adds driver for the MAX98504 speaker amplifier. The MAX98504
is a high efficiency mono class D amplifier that features an integrated
boost converter with voltage and current sensing ADCs for Dynamic Speaker
Management.
This driver does not include support for the I2S DAI, as we wouldn't be
able to test such code in a hardware configuration where the amplifier
has only wired the analogue input.
Signed-off-by: Inha Song <ideal.song at samsung.com>
[k.kozlowski: rebased on 4.1]
Signed-off-by: Krzysztof Kozlowski <k.kozlowski at samsung.com>
[s.nawrocki: removed unused macro definitions and regulator handling
code, rewrote regmap config code, added support for speaker enable
and global chip enable through DAPM, rewritten as component driver,
redesigned DT bindings]
Signed-off-by: Sylwester Nawrocki <s.nawrocki at samsung.com>
---
sound/soc/codecs/Kconfig | 4 +
sound/soc/codecs/Makefile | 2 +
sound/soc/codecs/max98504.c | 241 ++++++++++++++++++++++++++++++++++++++++++++
sound/soc/codecs/max98504.h | 94 +++++++++++++++++
4 files changed, 341 insertions(+)
create mode 100644 sound/soc/codecs/max98504.c
create mode 100644 sound/soc/codecs/max98504.h
diff --git a/sound/soc/codecs/Kconfig b/sound/soc/codecs/Kconfig
index c923c96..46853b2 100644
--- a/sound/soc/codecs/Kconfig
+++ b/sound/soc/codecs/Kconfig
@@ -552,6 +552,10 @@ config SND_SOC_MAX98357A
config SND_SOC_MAX98371
tristate
+config SND_SOC_MAX98504
+ tristate "Maxim MAX98504 speaker amplifier"
+ depends on I2C
+
config SND_SOC_MAX9867
tristate
diff --git a/sound/soc/codecs/Makefile b/sound/soc/codecs/Makefile
index 1264fa4..09d581c 100644
--- a/sound/soc/codecs/Makefile
+++ b/sound/soc/codecs/Makefile
@@ -213,6 +213,7 @@ snd-soc-wm-hubs-objs := wm_hubs.o
# Amp
snd-soc-max9877-objs := max9877.o
+snd-soc-max98504-objs := max98504.o
snd-soc-tpa6130a2-objs := tpa6130a2.o
snd-soc-tas2552-objs := tas2552.o
@@ -429,4 +430,5 @@ obj-$(CONFIG_SND_SOC_WM_HUBS) += snd-soc-wm-hubs.o
# Amp
obj-$(CONFIG_SND_SOC_MAX9877) += snd-soc-max9877.o
+obj-$(CONFIG_SND_SOC_MAX98504) += snd-soc-max98504.o
obj-$(CONFIG_SND_SOC_TPA6130A2) += snd-soc-tpa6130a2.o
diff --git a/sound/soc/codecs/max98504.c b/sound/soc/codecs/max98504.c
new file mode 100644
index 0000000..15035e1
--- /dev/null
+++ b/sound/soc/codecs/max98504.c
@@ -0,0 +1,241 @@
+/*
+ * MAX98504 ALSA SoC Audio driver
+ *
+ * Copyright 2013 - 2014 Maxim Integrated Products
+ * Copyright 2016 Samsung Electronics Co., Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#include <linux/module.h>
+#include <linux/i2c.h>
+#include <sound/soc.h>
+#include <linux/slab.h>
+#include <linux/delay.h>
+
+#include "max98504.h"
+
+static struct reg_default max98504_reg_defaults[] = {
+ { 0x01, 0},
+ { 0x02, 0},
+ { 0x03, 0},
+ { 0x04, 0},
+ { 0x10, 0},
+ { 0x11, 0},
+ { 0x12, 0},
+ { 0x13, 0},
+ { 0x14, 0},
+ { 0x15, 0},
+ { 0x16, 0},
+ { 0x17, 0},
+ { 0x18, 0},
+ { 0x19, 0},
+ { 0x1A, 0},
+ { 0x20, 0},
+ { 0x21, 0},
+ { 0x22, 0},
+ { 0x23, 0},
+ { 0x24, 0},
+ { 0x25, 0},
+ { 0x26, 0},
+ { 0x27, 0},
+ { 0x28, 0},
+ { 0x30, 0},
+ { 0x31, 0},
+ { 0x32, 0},
+ { 0x33, 0},
+ { 0x34, 0},
+ { 0x35, 0},
+ { 0x36, 0},
+ { 0x37, 0},
+ { 0x38, 0},
+ { 0x39, 0},
+ { 0x40, 0},
+ { 0x41, 0},
+};
+
+static bool max98504_volatile_register(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case MAX98504_REG_INTERRUPT_STATUS:
+ case MAX98504_REG_INTERRUPT_FLAGS:
+ case MAX98504_REG_INTERRUPT_FLAG_CLEARS:
+ case MAX98504_REG_WATCHDOG_CLEAR:
+ case MAX98504_REG_GLOBAL_ENABLE:
+ case MAX98504_REG_SOFTWARE_RESET:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static bool max98504_readable_register(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case MAX98504_REG_SOFTWARE_RESET:
+ case MAX98504_REG_WATCHDOG_CLEAR:
+ case MAX98504_REG_INTERRUPT_FLAG_CLEARS:
+ return false;
+ default:
+ return true;
+ }
+}
+
+static int max98504_probe(struct max98504_priv *max98504)
+{
+ struct regmap *map = max98504->regmap;
+
+ /* Software reset */
+ regmap_write(map, MAX98504_REG_SOFTWARE_RESET, 0x01);
+ msleep(20);
+
+ /* DAI PCM/PDM Rx configuration */
+ switch (max98504->rx_path) {
+ case MODE_RX_PCM:
+ regmap_write(map, MAX98504_REG_PCM_RX_ENABLE,
+ max98504->rx_ch_enable);
+ break;
+ case MODE_RX_PDM0...MODE_RX_PDM1:
+ regmap_write(map, MAX98504_REG_PDM_RX_ENABLE,
+ M98504_PDM_RX_EN_MASK);
+ break;
+ default:
+ /* Analog input, disable PCM, PDM Rx */
+ regmap_write(map, MAX98504_REG_PCM_RX_ENABLE, 0);
+ regmap_write(map, MAX98504_REG_PDM_RX_ENABLE, 0);
+ }
+
+ regmap_write(map, MAX98504_REG_SPEAKER_SOURCE_SELECT,
+ max98504->rx_path & M98504_SPK_SRC_SEL_MASK);
+
+ /* DAI PCM/PDM Tx configuration */
+ switch (max98504->tx_path) {
+ case MODE_TX_PCM:
+ regmap_write(map, MAX98504_REG_PCM_TX_ENABLE,
+ max98504->tx_ch_enable);
+ regmap_write(map, MAX98504_REG_PCM_TX_CHANNEL_SOURCES,
+ max98504->tx_ch_source);
+ break;
+ default:
+ /* PDM Tx */
+ regmap_write(map, MAX98504_REG_PDM_TX_ENABLE,
+ max98504->tx_ch_enable);
+ regmap_write(map, MAX98504_REG_PDM_TX_CONTROL,
+ max98504->tx_ch_source);
+ }
+
+ regmap_write(map, MAX98504_REG_MEASUREMENT_ENABLE, 0x3);
+
+ /* Brownout protection */
+ regmap_write(map, MAX98504_REG_PVDD_BROWNOUT_ENABLE, 0x1);
+ regmap_write(map, MAX98504_REG_PVDD_BROWNOUT_CONFIG(1), 0x33);
+ regmap_write(map, MAX98504_REG_PVDD_BROWNOUT_CONFIG(2), 0x0a);
+ regmap_write(map, MAX98504_REG_PVDD_BROWNOUT_CONFIG(3), 0xff);
+ regmap_write(map, MAX98504_REG_PVDD_BROWNOUT_CONFIG(4), 0xff);
+
+ return 0;
+}
+
+static const struct snd_soc_dapm_route max98504_dapm_routes[] = {
+ { "SPKOUT", NULL, "Global Enable" },
+};
+
+static const struct snd_soc_dapm_widget max98504_dapm_widgets[] = {
+ SND_SOC_DAPM_SUPPLY("Global Enable", MAX98504_REG_GLOBAL_ENABLE,
+ 0, 0, NULL, 0),
+ SND_SOC_DAPM_REG(snd_soc_dapm_spk, "SPKOUT",
+ MAX98504_REG_SPEAKER_ENABLE, 0, 1, 1, 0),
+};
+
+static const struct snd_soc_component_driver max98504_component_driver = {
+ .dapm_widgets = max98504_dapm_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(max98504_dapm_widgets),
+ .dapm_routes = max98504_dapm_routes,
+ .num_dapm_routes = ARRAY_SIZE(max98504_dapm_routes),
+};
+
+static const struct regmap_config max98504_regmap = {
+ .reg_bits = 16,
+ .val_bits = 8,
+ .max_register = MAX98504_MAX_REGISTER,
+ .reg_defaults = max98504_reg_defaults,
+ .num_reg_defaults = ARRAY_SIZE(max98504_reg_defaults),
+ .volatile_reg = max98504_volatile_register,
+ .readable_reg = max98504_readable_register,
+ .cache_type = REGCACHE_RBTREE,
+};
+
+static void max98504_parse_dt(struct max98504_priv *max98504,
+ struct device_node *of_node)
+{
+ of_property_read_u32(of_node, "maxim,rx-path",
+ &max98504->rx_path);
+
+ of_property_read_u32(of_node, "maxim,tx-path",
+ &max98504->tx_path);
+
+ of_property_read_u32(of_node, "maxim,rx-channel-mask",
+ &max98504->rx_ch_enable);
+
+ of_property_read_u32(of_node, "maxim,tx-channel-mask",
+ &max98504->tx_ch_enable);
+
+ of_property_read_u32(of_node, "maxim,tx-channel-source",
+ &max98504->tx_ch_source);
+}
+
+static int max98504_i2c_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct max98504_priv *max98504;
+ int ret;
+
+ max98504 = devm_kzalloc(&client->dev, sizeof(*max98504), GFP_KERNEL);
+ if (!max98504)
+ return -ENOMEM;
+
+ if (client->dev.of_node)
+ max98504_parse_dt(max98504, client->dev.of_node);
+
+ max98504->regmap = devm_regmap_init_i2c(client, &max98504_regmap);
+ if (IS_ERR(max98504->regmap)) {
+ ret = PTR_ERR(max98504->regmap);
+ dev_err(&client->dev, "regmap initialization failed: %d\n", ret);
+ return ret;
+ }
+
+ ret = max98504_probe(max98504);
+ if (ret < 0)
+ return ret;
+
+ return devm_snd_soc_register_component(&client->dev,
+ &max98504_component_driver, NULL, 0);
+}
+
+#ifdef CONFIG_OF
+static const struct of_device_id max98504_of_match[] = {
+ { .compatible = "maxim,max98504", },
+ { },
+};
+MODULE_DEVICE_TABLE(of, rt5651_of_match);
+#endif
+
+static const struct i2c_device_id max98504_i2c_id[] = {
+ { "max98504" },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, max98504_i2c_id);
+
+static struct i2c_driver max98504_i2c_driver = {
+ .driver = {
+ .name = "max98504",
+ .of_match_table = of_match_ptr(max98504_of_match),
+ },
+ .probe = max98504_i2c_probe,
+ .id_table = max98504_i2c_id,
+};
+module_i2c_driver(max98504_i2c_driver);
+
+MODULE_DESCRIPTION("ASoC MAX98504 driver");
+MODULE_LICENSE("GPL");
diff --git a/sound/soc/codecs/max98504.h b/sound/soc/codecs/max98504.h
new file mode 100644
index 0000000..fa176ffd
--- /dev/null
+++ b/sound/soc/codecs/max98504.h
@@ -0,0 +1,94 @@
+/*
+ * MAX98504 ALSA SoC Audio driver
+ *
+ * Copyright 2011 - 2012 Maxim Integrated Products
+ * Copyright 2016 Samsung Electronics Co., Ltd.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+#ifndef MAX98504_H_
+#define MAX98504_H_
+
+/*
+ * MAX98504 Register Definitions
+ */
+#define MAX98504_REG_INTERRUPT_STATUS 0x01
+#define MAX98504_REG_INTERRUPT_FLAGS 0x02
+#define MAX98504_REG_INTERRUPT_ENABLE 0x03
+#define MAX98504_REG_INTERRUPT_FLAG_CLEARS 0x04
+#define MAX98504_REG_GPIO_ENABLE 0x10
+#define MAX98504_REG_GPIO_CONFIG 0x11
+#define MAX98504_REG_WATCHDOG_ENABLE 0x12
+#define MAX98504_REG_WATCHDOG_CONFIG 0x13
+#define MAX98504_REG_WATCHDOG_CLEAR 0x14
+#define MAX98504_REG_CLOCK_MONITOR_ENABLE 0x15
+#define MAX98504_REG_PVDD_BROWNOUT_ENABLE 0x16
+/* n = 1...4 */
+#define MAX98504_REG_PVDD_BROWNOUT_CONFIG(n) (0x17 + (n) - 1)
+#define MAX98504_REG_PCM_RX_ENABLE 0x20
+#define MAX98504_REG_PCM_TX_ENABLE 0x21
+#define MAX98504_REG_PCM_TX_HIZ_CONTROL 0x22
+#define MAX98504_REG_PCM_TX_CHANNEL_SOURCES 0x23
+#define MAX98504_REG_PCM_MODE_CONFIG 0x24
+#define MAX98504_REG_PCM_DSP_CONFIG 0x25
+#define MAX98504_REG_PCM_CLOCK_SETUP 0x26
+#define MAX98504_REG_PCM_SAMPLE_RATE_SETUP 0x27
+#define MAX98504_REG_PCM_TO_SPEAKER_MONOMIX 0x28
+#define MAX98504_REG_PDM_TX_ENABLE 0x30
+#define MAX98504_REG_PDM_TX_HIZ_CONTROL 0x31
+#define MAX98504_REG_PDM_TX_CONTROL 0x32
+#define MAX98504_REG_PDM_RX_ENABLE 0x33
+#define MAX98504_REG_SPEAKER_ENABLE 0x34
+#define MAX98504_REG_SPEAKER_SOURCE_SELECT 0x35
+#define MAX98504_REG_MEASUREMENT_ENABLE 0x36
+#define MAX98504_REG_ANALOGUE_INPUT_GAIN 0x37
+#define MAX98504_REG_TEMPERATURE_LIMIT_CONFIG 0x38
+#define MAX98504_REG_ANALOGUE_SPARE 0x39
+#define MAX98504_REG_GLOBAL_ENABLE 0x40
+#define MAX98504_REG_SOFTWARE_RESET 0x41
+#define MAX98504_REG_REV_ID 0x7fff
+
+#define MAX98504_MAX_REGISTER 0x7fff
+
+/* Register Bit Fields */
+
+/* MAX98504_REG_PCM_DSP_CONFIG */
+#define M98504_PCM_DSP_CFG_TX_DITH_EN_MASK (1 << 7)
+#define M98504_PCM_DSP_CFG_MEAS_DCBLK_EN_MASK (1 << 6)
+#define M98504_PCM_DSP_CFG_RX_DITH_EN_MASK (1 << 5)
+#define M98504_PCM_DSP_CFG_RX_FLT_MODE_MASK (1 << 4)
+
+/* MAX98504_REG_PDM_RX_ENABLE */
+#define M98504_PDM_RX_EN_MASK (1 << 0)
+
+/* MAX98504_REG_SPEAKER_SOURCE_SELECT */
+#define M98504_SPK_SRC_SEL_MASK (0x3 << 0)
+#define M98504_SPK_SRC_SEL_PDM_CH1 (0x3 << 0)
+#define M98504_SPK_SRC_SEL_PDM_CH0 (0x2 << 0)
+#define M98504_SPK_SRC_SEL_ANALOG (0x1 << 0)
+#define M98504_SPK_SRC_SEL_PCM_MONOMIX (0x0 << 0)
+
+enum max98504_rx_path {
+ MODE_RX_PCM,
+ MODE_RX_AIN,
+ MODE_RX_PDM0,
+ MODE_RX_PDM1,
+};
+
+enum max98504_tx_path {
+ MODE_TX_PCM,
+ MODE_TX_PDM,
+};
+
+struct max98504_priv {
+ struct regmap *regmap;
+ u32 rx_path;
+ u32 tx_path;
+ u32 rx_ch_enable;
+ u32 tx_ch_enable;
+ u32 tx_ch_source;
+};
+
+#endif /* MAX98504_H_ */
--
1.9.1
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