ASoC: tas2552: Support TI TAS2552 Amplifier
Support the TI TAS2552 Class D amplifier.
The TAS2552 is a high efficiency Class-D audio
power amplifier with advanced battery current
management and an integrated Class-G boost
The device constantly measures the
current and voltage across the load and provides a
digital stream of this information.
Signed-off-by: Dan Murphy <dmurphy@ti.com>
Signed-off-by: Mark Brown <broonie@linaro.org>
diff --git a/sound/soc/codecs/tas2552.c b/sound/soc/codecs/tas2552.c
new file mode 100644
index 0000000..f0760af
--- /dev/null
+++ b/sound/soc/codecs/tas2552.c
@@ -0,0 +1,540 @@
+/*
+ * tas2552.c - ALSA SoC Texas Instruments TAS2552 Mono Audio Amplifier
+ *
+ * Copyright (C) 2014 Texas Instruments Incorporated - http://www.ti.com
+ *
+ * Author: Dan Murphy <dmurphy@ti.com>
+ *
+ * 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.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+ * General Public License for more details.
+ */
+
+#include <linux/module.h>
+#include <linux/errno.h>
+#include <linux/device.h>
+#include <linux/i2c.h>
+#include <linux/gpio.h>
+#include <linux/of_gpio.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/slab.h>
+
+#include <linux/gpio/consumer.h>
+#include <linux/regulator/consumer.h>
+
+#include <sound/pcm.h>
+#include <sound/pcm_params.h>
+#include <sound/soc.h>
+#include <sound/soc-dapm.h>
+#include <sound/tlv.h>
+#include <sound/tas2552-plat.h>
+
+#include "tas2552.h"
+
+static struct reg_default tas2552_reg_defs[] = {
+ {TAS2552_CFG_1, 0x22},
+ {TAS2552_CFG_3, 0x80},
+ {TAS2552_DOUT, 0x00},
+ {TAS2552_OUTPUT_DATA, 0xc0},
+ {TAS2552_PDM_CFG, 0x01},
+ {TAS2552_PGA_GAIN, 0x00},
+ {TAS2552_BOOST_PT_CTRL, 0x0f},
+ {TAS2552_RESERVED_0D, 0x00},
+ {TAS2552_LIMIT_RATE_HYS, 0x08},
+ {TAS2552_CFG_2, 0xef},
+ {TAS2552_SER_CTRL_1, 0x00},
+ {TAS2552_SER_CTRL_2, 0x00},
+ {TAS2552_PLL_CTRL_1, 0x10},
+ {TAS2552_PLL_CTRL_2, 0x00},
+ {TAS2552_PLL_CTRL_3, 0x00},
+ {TAS2552_BTIP, 0x8f},
+ {TAS2552_BTS_CTRL, 0x80},
+ {TAS2552_LIMIT_RELEASE, 0x04},
+ {TAS2552_LIMIT_INT_COUNT, 0x00},
+ {TAS2552_EDGE_RATE_CTRL, 0x40},
+ {TAS2552_VBAT_DATA, 0x00},
+};
+
+#define TAS2552_NUM_SUPPLIES 3
+static const char *tas2552_supply_names[TAS2552_NUM_SUPPLIES] = {
+ "vbat", /* vbat voltage */
+ "iovdd", /* I/O Voltage */
+ "avdd", /* Analog DAC Voltage */
+};
+
+struct tas2552_data {
+ struct snd_soc_codec *codec;
+ struct regmap *regmap;
+ struct i2c_client *tas2552_client;
+ struct regulator_bulk_data supplies[TAS2552_NUM_SUPPLIES];
+ struct gpio_desc *enable_gpio;
+ unsigned char regs[TAS2552_VBAT_DATA];
+ unsigned int mclk;
+};
+
+static void tas2552_sw_shutdown(struct tas2552_data *tas_data, int sw_shutdown)
+{
+ u8 cfg1_reg;
+
+ if (sw_shutdown)
+ cfg1_reg = 0;
+ else
+ cfg1_reg = TAS2552_SWS_MASK;
+
+ snd_soc_update_bits(tas_data->codec, TAS2552_CFG_1,
+ TAS2552_SWS_MASK, cfg1_reg);
+}
+
+static int tas2552_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 tas2552_data *tas2552 = dev_get_drvdata(codec->dev);
+ int sample_rate, pll_clk;
+ int d;
+ u8 p, j;
+
+ /* Turn on Class D amplifier */
+ snd_soc_update_bits(codec, TAS2552_CFG_2, TAS2552_CLASSD_EN_MASK,
+ TAS2552_CLASSD_EN);
+
+ if (!tas2552->mclk)
+ return -EINVAL;
+
+ snd_soc_update_bits(codec, TAS2552_CFG_2, TAS2552_PLL_ENABLE, 0);
+
+ if (tas2552->mclk == TAS2552_245MHZ_CLK ||
+ tas2552->mclk == TAS2552_225MHZ_CLK) {
+ /* By pass the PLL configuration */
+ snd_soc_update_bits(codec, TAS2552_PLL_CTRL_2,
+ TAS2552_PLL_BYPASS_MASK,
+ TAS2552_PLL_BYPASS);
+ } else {
+ /* Fill in the PLL control registers for J & D
+ * PLL_CLK = (.5 * freq * J.D) / 2^p
+ * Need to fill in J and D here based on incoming freq
+ */
+ p = snd_soc_read(codec, TAS2552_PLL_CTRL_1);
+ p = (p >> 7);
+ sample_rate = params_rate(params);
+
+ if (sample_rate == 48000)
+ pll_clk = TAS2552_245MHZ_CLK;
+ else if (sample_rate == 44100)
+ pll_clk = TAS2552_225MHZ_CLK;
+ else {
+ dev_vdbg(codec->dev, "Substream sample rate is not found %i\n",
+ params_rate(params));
+ return -EINVAL;
+ }
+
+ j = (pll_clk * 2 * (1 << p)) / tas2552->mclk;
+ d = (pll_clk * 2 * (1 << p)) % tas2552->mclk;
+
+ snd_soc_update_bits(codec, TAS2552_PLL_CTRL_1,
+ TAS2552_PLL_J_MASK, j);
+ snd_soc_write(codec, TAS2552_PLL_CTRL_2,
+ (d >> 7) & TAS2552_PLL_D_UPPER_MASK);
+ snd_soc_write(codec, TAS2552_PLL_CTRL_3,
+ d & TAS2552_PLL_D_LOWER_MASK);
+
+ }
+
+ snd_soc_update_bits(codec, TAS2552_CFG_2, TAS2552_PLL_ENABLE,
+ TAS2552_PLL_ENABLE);
+
+ return 0;
+}
+
+static int tas2552_set_dai_fmt(struct snd_soc_dai *dai, unsigned int fmt)
+{
+ struct snd_soc_codec *codec = dai->codec;
+ u8 serial_format;
+ u8 serial_control_mask;
+
+ switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+ case SND_SOC_DAIFMT_CBS_CFS:
+ serial_format = 0x00;
+ break;
+ case SND_SOC_DAIFMT_CBS_CFM:
+ serial_format = TAS2552_WORD_CLK_MASK;
+ break;
+ case SND_SOC_DAIFMT_CBM_CFS:
+ serial_format = TAS2552_BIT_CLK_MASK;
+ break;
+ case SND_SOC_DAIFMT_CBM_CFM:
+ serial_format = (TAS2552_BIT_CLK_MASK | TAS2552_WORD_CLK_MASK);
+ break;
+ default:
+ dev_vdbg(codec->dev, "DAI Format master is not found\n");
+ return -EINVAL;
+ }
+
+ serial_control_mask = TAS2552_BIT_CLK_MASK | TAS2552_WORD_CLK_MASK;
+
+ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+ case SND_SOC_DAIFMT_I2S:
+ serial_format &= TAS2552_DAIFMT_I2S_MASK;
+ break;
+ case SND_SOC_DAIFMT_DSP_A:
+ serial_format |= TAS2552_DAIFMT_DSP;
+ break;
+ case SND_SOC_DAIFMT_RIGHT_J:
+ serial_format |= TAS2552_DAIFMT_RIGHT_J;
+ break;
+ case SND_SOC_DAIFMT_LEFT_J:
+ serial_format |= TAS2552_DAIFMT_LEFT_J;
+ break;
+ default:
+ dev_vdbg(codec->dev, "DAI Format is not found\n");
+ return -EINVAL;
+ }
+
+ if (fmt & SND_SOC_DAIFMT_FORMAT_MASK)
+ serial_control_mask |= TAS2552_DATA_FORMAT_MASK;
+
+ snd_soc_update_bits(codec, TAS2552_SER_CTRL_1, serial_control_mask,
+ serial_format);
+
+ return 0;
+}
+
+static int tas2552_set_dai_sysclk(struct snd_soc_dai *dai, int clk_id,
+ unsigned int freq, int dir)
+{
+ struct snd_soc_codec *codec = dai->codec;
+ struct tas2552_data *tas2552 = dev_get_drvdata(codec->dev);
+
+ tas2552->mclk = freq;
+
+ return 0;
+}
+
+static int tas2552_mute(struct snd_soc_dai *dai, int mute)
+{
+ u8 cfg1_reg;
+ struct snd_soc_codec *codec = dai->codec;
+
+ if (mute)
+ cfg1_reg = TAS2552_MUTE_MASK;
+ else
+ cfg1_reg = ~TAS2552_MUTE_MASK;
+
+ snd_soc_update_bits(codec, TAS2552_CFG_1, TAS2552_MUTE_MASK, cfg1_reg);
+
+ return 0;
+}
+
+#ifdef CONFIG_PM_RUNTIME
+static int tas2552_runtime_suspend(struct device *dev)
+{
+ struct tas2552_data *tas2552 = dev_get_drvdata(dev);
+
+ tas2552_sw_shutdown(tas2552, 0);
+
+ if (tas2552->enable_gpio)
+ gpiod_set_value(tas2552->enable_gpio, 0);
+
+ regcache_cache_only(tas2552->regmap, true);
+ regcache_mark_dirty(tas2552->regmap);
+
+ return 0;
+}
+
+static int tas2552_runtime_resume(struct device *dev)
+{
+ struct tas2552_data *tas2552 = dev_get_drvdata(dev);
+
+ if (tas2552->enable_gpio)
+ gpiod_set_value(tas2552->enable_gpio, 1);
+
+ tas2552_sw_shutdown(tas2552, 1);
+
+ regcache_cache_only(tas2552->regmap, false);
+ regcache_sync(tas2552->regmap);
+
+ return 0;
+}
+#endif
+
+static const struct dev_pm_ops tas2552_pm = {
+ SET_RUNTIME_PM_OPS(tas2552_runtime_suspend, tas2552_runtime_resume,
+ NULL)
+};
+
+static void tas2552_shutdown(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_codec *codec = dai->codec;
+
+ snd_soc_update_bits(codec, TAS2552_CFG_2, TAS2552_PLL_ENABLE, 0);
+}
+
+static struct snd_soc_dai_ops tas2552_speaker_dai_ops = {
+ .hw_params = tas2552_hw_params,
+ .set_sysclk = tas2552_set_dai_sysclk,
+ .set_fmt = tas2552_set_dai_fmt,
+ .shutdown = tas2552_shutdown,
+ .digital_mute = tas2552_mute,
+};
+
+/* Formats supported by TAS2552 driver. */
+#define TAS2552_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
+ SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
+
+/* TAS2552 dai structure. */
+static struct snd_soc_dai_driver tas2552_dai[] = {
+ {
+ .name = "tas2552-amplifier",
+ .playback = {
+ .stream_name = "Speaker",
+ .channels_min = 2,
+ .channels_max = 2,
+ .rates = SNDRV_PCM_RATE_8000_192000,
+ .formats = TAS2552_FORMATS,
+ },
+ .ops = &tas2552_speaker_dai_ops,
+ },
+};
+
+/*
+ * DAC digital volumes. From -7 to 24 dB in 1 dB steps
+ */
+static DECLARE_TLV_DB_SCALE(dac_tlv, -7, 100, 24);
+
+static const struct snd_kcontrol_new tas2552_snd_controls[] = {
+ SOC_SINGLE_TLV("Speaker Driver Playback Volume",
+ TAS2552_PGA_GAIN, 0, 0x1f, 1, dac_tlv),
+};
+
+static const struct reg_default tas2552_init_regs[] = {
+ { TAS2552_RESERVED_0D, 0xc0 },
+};
+
+static int tas2552_codec_probe(struct snd_soc_codec *codec)
+{
+ struct tas2552_data *tas2552 = snd_soc_codec_get_drvdata(codec);
+ int ret;
+
+ tas2552->codec = codec;
+
+ ret = regulator_bulk_enable(ARRAY_SIZE(tas2552->supplies),
+ tas2552->supplies);
+
+ if (ret != 0) {
+ dev_err(codec->dev, "Failed to enable supplies: %d\n",
+ ret);
+ return ret;
+ }
+
+ if (tas2552->enable_gpio)
+ gpiod_set_value(tas2552->enable_gpio, 1);
+
+ ret = pm_runtime_get_sync(codec->dev);
+ if (ret < 0) {
+ dev_err(codec->dev, "Enabling device failed: %d\n",
+ ret);
+ goto probe_fail;
+ }
+
+ snd_soc_write(codec, TAS2552_CFG_1, TAS2552_MUTE_MASK |
+ TAS2552_PLL_SRC_BCLK);
+ snd_soc_write(codec, TAS2552_CFG_3, TAS2552_I2S_OUT_SEL |
+ TAS2552_DIN_SRC_SEL_AVG_L_R | TAS2552_88_96KHZ);
+ snd_soc_write(codec, TAS2552_DOUT, TAS2552_PDM_DATA_I);
+ snd_soc_write(codec, TAS2552_OUTPUT_DATA, TAS2552_PDM_DATA_V_I | 0x8);
+ snd_soc_write(codec, TAS2552_PDM_CFG, TAS2552_PDM_BCLK_SEL);
+ snd_soc_write(codec, TAS2552_BOOST_PT_CTRL, TAS2552_APT_DELAY_200 |
+ TAS2552_APT_THRESH_2_1_7);
+
+ ret = regmap_register_patch(tas2552->regmap, tas2552_init_regs,
+ ARRAY_SIZE(tas2552_init_regs));
+ if (ret != 0) {
+ dev_err(codec->dev, "Failed to write init registers: %d\n",
+ ret);
+ goto patch_fail;
+ }
+
+ snd_soc_write(codec, TAS2552_CFG_2, TAS2552_CLASSD_EN |
+ TAS2552_BOOST_EN | TAS2552_APT_EN |
+ TAS2552_LIM_EN);
+ return 0;
+
+patch_fail:
+ pm_runtime_put(codec->dev);
+probe_fail:
+ if (tas2552->enable_gpio)
+ gpiod_set_value(tas2552->enable_gpio, 0);
+
+ regulator_bulk_disable(ARRAY_SIZE(tas2552->supplies),
+ tas2552->supplies);
+ return -EIO;
+}
+
+static int tas2552_codec_remove(struct snd_soc_codec *codec)
+{
+ struct tas2552_data *tas2552 = snd_soc_codec_get_drvdata(codec);
+
+ if (tas2552->enable_gpio)
+ gpiod_set_value(tas2552->enable_gpio, 0);
+
+ return 0;
+};
+
+#ifdef CONFIG_PM
+static int tas2552_suspend(struct snd_soc_codec *codec)
+{
+ struct tas2552_data *tas2552 = snd_soc_codec_get_drvdata(codec);
+ int ret;
+
+ ret = regulator_bulk_disable(ARRAY_SIZE(tas2552->supplies),
+ tas2552->supplies);
+
+ if (ret != 0)
+ dev_err(codec->dev, "Failed to disable supplies: %d\n",
+ ret);
+ return 0;
+}
+
+static int tas2552_resume(struct snd_soc_codec *codec)
+{
+ struct tas2552_data *tas2552 = snd_soc_codec_get_drvdata(codec);
+ int ret;
+
+ ret = regulator_bulk_enable(ARRAY_SIZE(tas2552->supplies),
+ tas2552->supplies);
+
+ if (ret != 0) {
+ dev_err(codec->dev, "Failed to enable supplies: %d\n",
+ ret);
+ }
+
+ return 0;
+}
+#else
+#define tas2552_suspend NULL
+#define tas2552_resume NULL
+#endif
+
+static struct snd_soc_codec_driver soc_codec_dev_tas2552 = {
+ .probe = tas2552_codec_probe,
+ .remove = tas2552_codec_remove,
+ .suspend = tas2552_suspend,
+ .resume = tas2552_resume,
+ .controls = tas2552_snd_controls,
+ .num_controls = ARRAY_SIZE(tas2552_snd_controls),
+};
+
+static const struct regmap_config tas2552_regmap_config = {
+ .reg_bits = 8,
+ .val_bits = 8,
+
+ .max_register = TAS2552_MAX_REG,
+ .reg_defaults = tas2552_reg_defs,
+ .num_reg_defaults = ARRAY_SIZE(tas2552_reg_defs),
+ .cache_type = REGCACHE_RBTREE,
+};
+
+static int tas2552_probe(struct i2c_client *client,
+ const struct i2c_device_id *id)
+{
+ struct device *dev;
+ struct tas2552_data *data;
+ int ret;
+ int i;
+
+ dev = &client->dev;
+ data = devm_kzalloc(&client->dev, sizeof(*data), GFP_KERNEL);
+ if (data == NULL)
+ return -ENOMEM;
+
+ data->enable_gpio = devm_gpiod_get(dev, "enable");
+ if (IS_ERR(data->enable_gpio)) {
+ ret = PTR_ERR(data->enable_gpio);
+ if (ret != -ENOENT && ret != -ENOSYS)
+ return ret;
+
+ data->enable_gpio = NULL;
+ } else {
+ gpiod_direction_output(data->enable_gpio, 0);
+ }
+
+ data->tas2552_client = client;
+ data->regmap = devm_regmap_init_i2c(client, &tas2552_regmap_config);
+ if (IS_ERR(data->regmap)) {
+ ret = PTR_ERR(data->regmap);
+ dev_err(&client->dev, "Failed to allocate register map: %d\n",
+ ret);
+ return ret;
+ }
+
+ for (i = 0; i < ARRAY_SIZE(data->supplies); i++)
+ data->supplies[i].supply = tas2552_supply_names[i];
+
+ ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(data->supplies),
+ data->supplies);
+ if (ret != 0)
+ dev_err(dev, "Failed to request supplies: %d\n", ret);
+
+ pm_runtime_set_active(&client->dev);
+ pm_runtime_set_autosuspend_delay(&client->dev, 1000);
+ pm_runtime_use_autosuspend(&client->dev);
+ pm_runtime_enable(&client->dev);
+ pm_runtime_mark_last_busy(&client->dev);
+ pm_runtime_put_sync_autosuspend(&client->dev);
+
+ dev_set_drvdata(&client->dev, data);
+
+ ret = snd_soc_register_codec(&client->dev,
+ &soc_codec_dev_tas2552,
+ tas2552_dai, ARRAY_SIZE(tas2552_dai));
+ if (ret < 0)
+ dev_err(&client->dev, "Failed to register codec: %d\n", ret);
+
+ return 0;
+}
+
+static int tas2552_i2c_remove(struct i2c_client *client)
+{
+ snd_soc_unregister_codec(&client->dev);
+ return 0;
+}
+
+static const struct i2c_device_id tas2552_id[] = {
+ { "tas2552", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, tas2552_id);
+
+#if IS_ENABLED(CONFIG_OF)
+static const struct of_device_id tas2552_of_match[] = {
+ { .compatible = "ti,tas2552", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, tas2552_of_match);
+#endif
+
+static struct i2c_driver tas2552_i2c_driver = {
+ .driver = {
+ .name = "tas2552",
+ .owner = THIS_MODULE,
+ .of_match_table = of_match_ptr(tas2552_of_match),
+ .pm = &tas2552_pm,
+ },
+ .probe = tas2552_probe,
+ .remove = tas2552_i2c_remove,
+ .id_table = tas2552_id,
+};
+
+module_i2c_driver(tas2552_i2c_driver);
+
+MODULE_AUTHOR("Dan Muprhy <dmurphy@ti.com>");
+MODULE_DESCRIPTION("TAS2552 Audio amplifier driver");
+MODULE_LICENSE("GPL");