--- /dev/null
+/*
+ * wm8741.c -- WM8741 ALSA SoC Audio driver
+ *
+ * Copyright 2010-1 Wolfson Microelectronics plc
+ *
+ * Author: Ian Lartey <ian@opensource.wolfsonmicro.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.
+ */
+
+#include <linux/module.h>
+#include <linux/moduleparam.h>
+#include <linux/init.h>
+#include <linux/delay.h>
+#include <linux/pm.h>
+#include <linux/i2c.h>
+#include <linux/spi/spi.h>
+#include <linux/regmap.h>
+#include <linux/regulator/consumer.h>
+#include <linux/slab.h>
+#include <linux/of_device.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>
+
+#include "wm8741.h"
+
+#define WM8741_NUM_SUPPLIES 2
+static const char *wm8741_supply_names[WM8741_NUM_SUPPLIES] = {
+ "AVDD",
+ "DVDD",
+};
+
+#define WM8741_NUM_RATES 6
+
+/* codec private data */
+struct wm8741_priv {
+ struct regmap *regmap;
+ struct regulator_bulk_data supplies[WM8741_NUM_SUPPLIES];
+ unsigned int sysclk;
+ const struct snd_pcm_hw_constraint_list *sysclk_constraints;
+};
+
+static const struct reg_default wm8741_reg_defaults[] = {
+ { 0, 0x0000 }, /* R0 - DACLLSB Attenuation */
+ { 1, 0x0000 }, /* R1 - DACLMSB Attenuation */
+ { 2, 0x0000 }, /* R2 - DACRLSB Attenuation */
+ { 3, 0x0000 }, /* R3 - DACRMSB Attenuation */
+ { 4, 0x0000 }, /* R4 - Volume Control */
+ { 5, 0x000A }, /* R5 - Format Control */
+ { 6, 0x0000 }, /* R6 - Filter Control */
+ { 7, 0x0000 }, /* R7 - Mode Control 1 */
+ { 8, 0x0002 }, /* R8 - Mode Control 2 */
+ { 32, 0x0002 }, /* R32 - ADDITONAL_CONTROL_1 */
+};
+
+static bool wm8741_readable(struct device *dev, unsigned int reg)
+{
+ switch (reg) {
+ case WM8741_DACLLSB_ATTENUATION:
+ case WM8741_DACLMSB_ATTENUATION:
+ case WM8741_DACRLSB_ATTENUATION:
+ case WM8741_DACRMSB_ATTENUATION:
+ case WM8741_VOLUME_CONTROL:
+ case WM8741_FORMAT_CONTROL:
+ case WM8741_FILTER_CONTROL:
+ case WM8741_MODE_CONTROL_1:
+ case WM8741_MODE_CONTROL_2:
+ case WM8741_ADDITIONAL_CONTROL_1:
+ return true;
+ default:
+ return false;
+ }
+}
+
+static int wm8741_reset(struct snd_soc_codec *codec)
+{
+ return snd_soc_write(codec, WM8741_RESET, 0);
+}
+
+static const DECLARE_TLV_DB_SCALE(dac_tlv_fine, -12700, 13, 0);
+static const DECLARE_TLV_DB_SCALE(dac_tlv, -12700, 400, 0);
+
+static const struct snd_kcontrol_new wm8741_snd_controls[] = {
+SOC_DOUBLE_R_TLV("Fine Playback Volume", WM8741_DACLLSB_ATTENUATION,
+ WM8741_DACRLSB_ATTENUATION, 1, 255, 1, dac_tlv_fine),
+SOC_DOUBLE_R_TLV("Playback Volume", WM8741_DACLMSB_ATTENUATION,
+ WM8741_DACRMSB_ATTENUATION, 0, 511, 1, dac_tlv),
+};
+
+static const struct snd_soc_dapm_widget wm8741_dapm_widgets[] = {
+SND_SOC_DAPM_DAC("DACL", "Playback", SND_SOC_NOPM, 0, 0),
+SND_SOC_DAPM_DAC("DACR", "Playback", SND_SOC_NOPM, 0, 0),
+SND_SOC_DAPM_OUTPUT("VOUTLP"),
+SND_SOC_DAPM_OUTPUT("VOUTLN"),
+SND_SOC_DAPM_OUTPUT("VOUTRP"),
+SND_SOC_DAPM_OUTPUT("VOUTRN"),
+};
+
+static const struct snd_soc_dapm_route wm8741_dapm_routes[] = {
+ { "VOUTLP", NULL, "DACL" },
+ { "VOUTLN", NULL, "DACL" },
+ { "VOUTRP", NULL, "DACR" },
+ { "VOUTRN", NULL, "DACR" },
+};
+
+static struct {
+ int value;
+ int ratio;
+} lrclk_ratios[WM8741_NUM_RATES] = {
+ { 1, 128 },
+ { 2, 192 },
+ { 3, 256 },
+ { 4, 384 },
+ { 5, 512 },
+ { 6, 768 },
+};
+
+static const unsigned int rates_11289[] = {
+ 44100, 88200,
+};
+
+static const struct snd_pcm_hw_constraint_list constraints_11289 = {
+ .count = ARRAY_SIZE(rates_11289),
+ .list = rates_11289,
+};
+
+static const unsigned int rates_12288[] = {
+ 32000, 48000, 96000,
+};
+
+static const struct snd_pcm_hw_constraint_list constraints_12288 = {
+ .count = ARRAY_SIZE(rates_12288),
+ .list = rates_12288,
+};
+
+static const unsigned int rates_16384[] = {
+ 32000,
+};
+
+static const struct snd_pcm_hw_constraint_list constraints_16384 = {
+ .count = ARRAY_SIZE(rates_16384),
+ .list = rates_16384,
+};
+
+static const unsigned int rates_16934[] = {
+ 44100, 88200,
+};
+
+static const struct snd_pcm_hw_constraint_list constraints_16934 = {
+ .count = ARRAY_SIZE(rates_16934),
+ .list = rates_16934,
+};
+
+static const unsigned int rates_18432[] = {
+ 48000, 96000,
+};
+
+static const struct snd_pcm_hw_constraint_list constraints_18432 = {
+ .count = ARRAY_SIZE(rates_18432),
+ .list = rates_18432,
+};
+
+static const unsigned int rates_22579[] = {
+ 44100, 88200, 176400
+};
+
+static const struct snd_pcm_hw_constraint_list constraints_22579 = {
+ .count = ARRAY_SIZE(rates_22579),
+ .list = rates_22579,
+};
+
+static const unsigned int rates_24576[] = {
+ 32000, 48000, 96000, 192000
+};
+
+static const struct snd_pcm_hw_constraint_list constraints_24576 = {
+ .count = ARRAY_SIZE(rates_24576),
+ .list = rates_24576,
+};
+
+static const unsigned int rates_36864[] = {
+ 48000, 96000, 192000
+};
+
+static const struct snd_pcm_hw_constraint_list constraints_36864 = {
+ .count = ARRAY_SIZE(rates_36864),
+ .list = rates_36864,
+};
+
+
+static int wm8741_startup(struct snd_pcm_substream *substream,
+ struct snd_soc_dai *dai)
+{
+ struct snd_soc_codec *codec = dai->codec;
+ struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
+
+ /* The set of sample rates that can be supported depends on the
+ * MCLK supplied to the CODEC - enforce this.
+ */
+ if (!wm8741->sysclk) {
+ dev_err(codec->dev,
+ "No MCLK configured, call set_sysclk() on init\n");
+ return -EINVAL;
+ }
+
+ snd_pcm_hw_constraint_list(substream->runtime, 0,
+ SNDRV_PCM_HW_PARAM_RATE,
+ wm8741->sysclk_constraints);
+
+ return 0;
+}
+
+static int wm8741_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 wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
+ u16 iface = snd_soc_read(codec, WM8741_FORMAT_CONTROL) & 0x1FC;
+ int i;
+
+ /* Find a supported LRCLK ratio */
+ for (i = 0; i < ARRAY_SIZE(lrclk_ratios); i++) {
+ if (wm8741->sysclk / params_rate(params) ==
+ lrclk_ratios[i].ratio)
+ break;
+ }
+
+ /* Should never happen, should be handled by constraints */
+ if (i == ARRAY_SIZE(lrclk_ratios)) {
+ dev_err(codec->dev, "MCLK/fs ratio %d unsupported\n",
+ wm8741->sysclk / params_rate(params));
+ return -EINVAL;
+ }
+
+ /* bit size */
+ switch (params_width(params)) {
+ case 16:
+ break;
+ case 20:
+ iface |= 0x0001;
+ break;
+ case 24:
+ iface |= 0x0002;
+ break;
+ case 32:
+ iface |= 0x0003;
+ break;
+ default:
+ dev_dbg(codec->dev, "wm8741_hw_params: Unsupported bit size param = %d",
+ params_width(params));
+ return -EINVAL;
+ }
+
+ dev_dbg(codec->dev, "wm8741_hw_params: bit size param = %d",
+ params_width(params));
+
+ snd_soc_write(codec, WM8741_FORMAT_CONTROL, iface);
+ return 0;
+}
+
+static int wm8741_set_dai_sysclk(struct snd_soc_dai *codec_dai,
+ int clk_id, unsigned int freq, int dir)
+{
+ struct snd_soc_codec *codec = codec_dai->codec;
+ struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
+
+ dev_dbg(codec->dev, "wm8741_set_dai_sysclk info: freq=%dHz\n", freq);
+
+ switch (freq) {
+ case 11289600:
+ wm8741->sysclk_constraints = &constraints_11289;
+ wm8741->sysclk = freq;
+ return 0;
+
+ case 12288000:
+ wm8741->sysclk_constraints = &constraints_12288;
+ wm8741->sysclk = freq;
+ return 0;
+
+ case 16384000:
+ wm8741->sysclk_constraints = &constraints_16384;
+ wm8741->sysclk = freq;
+ return 0;
+
+ case 16934400:
+ wm8741->sysclk_constraints = &constraints_16934;
+ wm8741->sysclk = freq;
+ return 0;
+
+ case 18432000:
+ wm8741->sysclk_constraints = &constraints_18432;
+ wm8741->sysclk = freq;
+ return 0;
+
+ case 22579200:
+ case 33868800:
+ wm8741->sysclk_constraints = &constraints_22579;
+ wm8741->sysclk = freq;
+ return 0;
+
+ case 24576000:
+ wm8741->sysclk_constraints = &constraints_24576;
+ wm8741->sysclk = freq;
+ return 0;
+
+ case 36864000:
+ wm8741->sysclk_constraints = &constraints_36864;
+ wm8741->sysclk = freq;
+ return 0;
+ }
+ return -EINVAL;
+}
+
+static int wm8741_set_dai_fmt(struct snd_soc_dai *codec_dai,
+ unsigned int fmt)
+{
+ struct snd_soc_codec *codec = codec_dai->codec;
+ u16 iface = snd_soc_read(codec, WM8741_FORMAT_CONTROL) & 0x1C3;
+
+ /* check master/slave audio interface */
+ switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
+ case SND_SOC_DAIFMT_CBS_CFS:
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ /* interface format */
+ switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
+ case SND_SOC_DAIFMT_I2S:
+ iface |= 0x0008;
+ break;
+ case SND_SOC_DAIFMT_RIGHT_J:
+ break;
+ case SND_SOC_DAIFMT_LEFT_J:
+ iface |= 0x0004;
+ break;
+ case SND_SOC_DAIFMT_DSP_A:
+ iface |= 0x000C;
+ break;
+ case SND_SOC_DAIFMT_DSP_B:
+ iface |= 0x001C;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+ /* clock inversion */
+ switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
+ case SND_SOC_DAIFMT_NB_NF:
+ break;
+ case SND_SOC_DAIFMT_IB_IF:
+ iface |= 0x0010;
+ break;
+ case SND_SOC_DAIFMT_IB_NF:
+ iface |= 0x0020;
+ break;
+ case SND_SOC_DAIFMT_NB_IF:
+ iface |= 0x0030;
+ break;
+ default:
+ return -EINVAL;
+ }
+
+
+ dev_dbg(codec->dev, "wm8741_set_dai_fmt: Format=%x, Clock Inv=%x\n",
+ fmt & SND_SOC_DAIFMT_FORMAT_MASK,
+ ((fmt & SND_SOC_DAIFMT_INV_MASK)));
+
+ snd_soc_write(codec, WM8741_FORMAT_CONTROL, iface);
+ return 0;
+}
+
+#define WM8741_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
+ SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | \
+ SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 | \
+ SNDRV_PCM_RATE_192000)
+
+#define WM8741_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
+ SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
+
+static const struct snd_soc_dai_ops wm8741_dai_ops = {
+ .startup = wm8741_startup,
+ .hw_params = wm8741_hw_params,
+ .set_sysclk = wm8741_set_dai_sysclk,
+ .set_fmt = wm8741_set_dai_fmt,
+};
+
+static struct snd_soc_dai_driver wm8741_dai = {
+ .name = "wm8741",
+ .playback = {
+ .stream_name = "Playback",
+ .channels_min = 2, /* Mono modes not yet supported */
+ .channels_max = 2,
+ .rates = WM8741_RATES,
+ .formats = WM8741_FORMATS,
+ },
+ .ops = &wm8741_dai_ops,
+};
+
+#ifdef CONFIG_PM
+static int wm8741_resume(struct snd_soc_codec *codec)
+{
+ snd_soc_cache_sync(codec);
+ return 0;
+}
+#else
+#define wm8741_resume NULL
+#endif
+
+static int wm8741_probe(struct snd_soc_codec *codec)
+{
+ struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
+ int ret = 0;
+
+ ret = regulator_bulk_enable(ARRAY_SIZE(wm8741->supplies),
+ wm8741->supplies);
+ if (ret != 0) {
+ dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
+ goto err_get;
+ }
+
+ ret = wm8741_reset(codec);
+ if (ret < 0) {
+ dev_err(codec->dev, "Failed to issue reset\n");
+ goto err_enable;
+ }
+
+ /* Change some default settings - latch VU */
+ snd_soc_update_bits(codec, WM8741_DACLLSB_ATTENUATION,
+ WM8741_UPDATELL, WM8741_UPDATELL);
+ snd_soc_update_bits(codec, WM8741_DACLMSB_ATTENUATION,
+ WM8741_UPDATELM, WM8741_UPDATELM);
+ snd_soc_update_bits(codec, WM8741_DACRLSB_ATTENUATION,
+ WM8741_UPDATERL, WM8741_UPDATERL);
+ snd_soc_update_bits(codec, WM8741_DACRMSB_ATTENUATION,
+ WM8741_UPDATERM, WM8741_UPDATERM);
+
+ dev_dbg(codec->dev, "Successful registration\n");
+ return ret;
+
+err_enable:
+ regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
+err_get:
+ return ret;
+}
+
+static int wm8741_remove(struct snd_soc_codec *codec)
+{
+ struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
+
+ regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
+
+ return 0;
+}
+
+static struct snd_soc_codec_driver soc_codec_dev_wm8741 = {
+ .probe = wm8741_probe,
+ .remove = wm8741_remove,
+ .resume = wm8741_resume,
+
+ .controls = wm8741_snd_controls,
+ .num_controls = ARRAY_SIZE(wm8741_snd_controls),
+ .dapm_widgets = wm8741_dapm_widgets,
+ .num_dapm_widgets = ARRAY_SIZE(wm8741_dapm_widgets),
+ .dapm_routes = wm8741_dapm_routes,
+ .num_dapm_routes = ARRAY_SIZE(wm8741_dapm_routes),
+};
+
+static const struct of_device_id wm8741_of_match[] = {
+ { .compatible = "wlf,wm8741", },
+ { }
+};
+MODULE_DEVICE_TABLE(of, wm8741_of_match);
+
+static const struct regmap_config wm8741_regmap = {
+ .reg_bits = 7,
+ .val_bits = 9,
+ .max_register = WM8741_MAX_REGISTER,
+
+ .reg_defaults = wm8741_reg_defaults,
+ .num_reg_defaults = ARRAY_SIZE(wm8741_reg_defaults),
+ .cache_type = REGCACHE_RBTREE,
+
+ .readable_reg = wm8741_readable,
+};
+
+#if IS_ENABLED(CONFIG_I2C)
+static int wm8741_i2c_probe(struct i2c_client *i2c,
+ const struct i2c_device_id *id)
+{
+ struct wm8741_priv *wm8741;
+ int ret, i;
+
+ wm8741 = devm_kzalloc(&i2c->dev, sizeof(struct wm8741_priv),
+ GFP_KERNEL);
+ if (wm8741 == NULL)
+ return -ENOMEM;
+
+ for (i = 0; i < ARRAY_SIZE(wm8741->supplies); i++)
+ wm8741->supplies[i].supply = wm8741_supply_names[i];
+
+ ret = devm_regulator_bulk_get(&i2c->dev, ARRAY_SIZE(wm8741->supplies),
+ wm8741->supplies);
+ if (ret != 0) {
+ dev_err(&i2c->dev, "Failed to request supplies: %d\n", ret);
+ return ret;
+ }
+
+ wm8741->regmap = devm_regmap_init_i2c(i2c, &wm8741_regmap);
+ if (IS_ERR(wm8741->regmap)) {
+ ret = PTR_ERR(wm8741->regmap);
+ dev_err(&i2c->dev, "Failed to init regmap: %d\n", ret);
+ return ret;
+ }
+
+ i2c_set_clientdata(i2c, wm8741);
+
+ ret = snd_soc_register_codec(&i2c->dev,
+ &soc_codec_dev_wm8741, &wm8741_dai, 1);
+
+ return ret;
+}
+
+static int wm8741_i2c_remove(struct i2c_client *client)
+{
+ snd_soc_unregister_codec(&client->dev);
+ return 0;
+}
+
+static const struct i2c_device_id wm8741_i2c_id[] = {
+ { "wm8741", 0 },
+ { }
+};
+MODULE_DEVICE_TABLE(i2c, wm8741_i2c_id);
+
+static struct i2c_driver wm8741_i2c_driver = {
+ .driver = {
+ .name = "wm8741",
+ .owner = THIS_MODULE,
+ .of_match_table = wm8741_of_match,
+ },
+ .probe = wm8741_i2c_probe,
+ .remove = wm8741_i2c_remove,
+ .id_table = wm8741_i2c_id,
+};
+#endif
+
+#if defined(CONFIG_SPI_MASTER)
+static int wm8741_spi_probe(struct spi_device *spi)
+{
+ struct wm8741_priv *wm8741;
+ int ret, i;
+
+ wm8741 = devm_kzalloc(&spi->dev, sizeof(struct wm8741_priv),
+ GFP_KERNEL);
+ if (wm8741 == NULL)
+ return -ENOMEM;
+
+ for (i = 0; i < ARRAY_SIZE(wm8741->supplies); i++)
+ wm8741->supplies[i].supply = wm8741_supply_names[i];
+
+ ret = devm_regulator_bulk_get(&spi->dev, ARRAY_SIZE(wm8741->supplies),
+ wm8741->supplies);
+ if (ret != 0) {
+ dev_err(&spi->dev, "Failed to request supplies: %d\n", ret);
+ return ret;
+ }
+
+ wm8741->regmap = devm_regmap_init_spi(spi, &wm8741_regmap);
+ if (IS_ERR(wm8741->regmap)) {
+ ret = PTR_ERR(wm8741->regmap);
+ dev_err(&spi->dev, "Failed to init regmap: %d\n", ret);
+ return ret;
+ }
+
+ spi_set_drvdata(spi, wm8741);
+
+ ret = snd_soc_register_codec(&spi->dev,
+ &soc_codec_dev_wm8741, &wm8741_dai, 1);
+ return ret;
+}
+
+static int wm8741_spi_remove(struct spi_device *spi)
+{
+ snd_soc_unregister_codec(&spi->dev);
+ return 0;
+}
+
+static struct spi_driver wm8741_spi_driver = {
+ .driver = {
+ .name = "wm8741",
+ .owner = THIS_MODULE,
+ .of_match_table = wm8741_of_match,
+ },
+ .probe = wm8741_spi_probe,
+ .remove = wm8741_spi_remove,
+};
+#endif /* CONFIG_SPI_MASTER */
+
+static int __init wm8741_modinit(void)
+{
+ int ret = 0;
+
+#if IS_ENABLED(CONFIG_I2C)
+ ret = i2c_add_driver(&wm8741_i2c_driver);
+ if (ret != 0)
+ pr_err("Failed to register WM8741 I2C driver: %d\n", ret);
+#endif
+#if defined(CONFIG_SPI_MASTER)
+ ret = spi_register_driver(&wm8741_spi_driver);
+ if (ret != 0) {
+ printk(KERN_ERR "Failed to register wm8741 SPI driver: %d\n",
+ ret);
+ }
+#endif
+
+ return ret;
+}
+module_init(wm8741_modinit);
+
+static void __exit wm8741_exit(void)
+{
+#if defined(CONFIG_SPI_MASTER)
+ spi_unregister_driver(&wm8741_spi_driver);
+#endif
+#if IS_ENABLED(CONFIG_I2C)
+ i2c_del_driver(&wm8741_i2c_driver);
+#endif
+}
+module_exit(wm8741_exit);
+
+MODULE_DESCRIPTION("ASoC WM8741 driver");
+MODULE_AUTHOR("Ian Lartey <ian@opensource.wolfsonmicro.com>");
+MODULE_LICENSE("GPL");
Code Review / kvmfornfv.git / blobdiff