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349 lines
8.0 KiB
349 lines
8.0 KiB
// SPDX-License-Identifier: GPL-2.0-only |
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/* |
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* wm8728.c -- WM8728 ALSA SoC Audio driver |
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* |
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* Copyright 2008 Wolfson Microelectronics plc |
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* |
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* Author: Mark Brown <[email protected]> |
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*/ |
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#include <linux/module.h> |
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#include <linux/moduleparam.h> |
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#include <linux/init.h> |
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#include <linux/delay.h> |
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#include <linux/pm.h> |
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#include <linux/i2c.h> |
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#include <linux/platform_device.h> |
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#include <linux/regmap.h> |
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#include <linux/spi/spi.h> |
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#include <linux/slab.h> |
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#include <linux/of_device.h> |
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#include <sound/core.h> |
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#include <sound/pcm.h> |
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#include <sound/pcm_params.h> |
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#include <sound/soc.h> |
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#include <sound/initval.h> |
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#include <sound/tlv.h> |
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#include "wm8728.h" |
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/* |
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* We can't read the WM8728 register space so we cache them instead. |
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* Note that the defaults here aren't the physical defaults, we latch |
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* the volume update bits, mute the output and enable infinite zero |
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* detect. |
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*/ |
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static const struct reg_default wm8728_reg_defaults[] = { |
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{ 0, 0x1ff }, |
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{ 1, 0x1ff }, |
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{ 2, 0x001 }, |
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{ 3, 0x100 }, |
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}; |
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/* codec private data */ |
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struct wm8728_priv { |
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struct regmap *regmap; |
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}; |
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static const DECLARE_TLV_DB_SCALE(wm8728_tlv, -12750, 50, 1); |
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static const struct snd_kcontrol_new wm8728_snd_controls[] = { |
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SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8728_DACLVOL, WM8728_DACRVOL, |
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0, 255, 0, wm8728_tlv), |
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SOC_SINGLE("Deemphasis", WM8728_DACCTL, 1, 1, 0), |
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}; |
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/* |
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* DAPM controls. |
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*/ |
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static const struct snd_soc_dapm_widget wm8728_dapm_widgets[] = { |
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SND_SOC_DAPM_DAC("DAC", "HiFi Playback", SND_SOC_NOPM, 0, 0), |
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SND_SOC_DAPM_OUTPUT("VOUTL"), |
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SND_SOC_DAPM_OUTPUT("VOUTR"), |
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}; |
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static const struct snd_soc_dapm_route wm8728_intercon[] = { |
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{"VOUTL", NULL, "DAC"}, |
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{"VOUTR", NULL, "DAC"}, |
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}; |
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static int wm8728_mute(struct snd_soc_dai *dai, int mute, int direction) |
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{ |
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struct snd_soc_component *component = dai->component; |
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u16 mute_reg = snd_soc_component_read(component, WM8728_DACCTL); |
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if (mute) |
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snd_soc_component_write(component, WM8728_DACCTL, mute_reg | 1); |
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else |
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snd_soc_component_write(component, WM8728_DACCTL, mute_reg & ~1); |
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return 0; |
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} |
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static int wm8728_hw_params(struct snd_pcm_substream *substream, |
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struct snd_pcm_hw_params *params, |
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struct snd_soc_dai *dai) |
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{ |
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struct snd_soc_component *component = dai->component; |
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u16 dac = snd_soc_component_read(component, WM8728_DACCTL); |
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dac &= ~0x18; |
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switch (params_width(params)) { |
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case 16: |
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break; |
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case 20: |
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dac |= 0x10; |
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break; |
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case 24: |
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dac |= 0x08; |
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break; |
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default: |
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return -EINVAL; |
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} |
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snd_soc_component_write(component, WM8728_DACCTL, dac); |
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return 0; |
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} |
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static int wm8728_set_dai_fmt(struct snd_soc_dai *codec_dai, |
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unsigned int fmt) |
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{ |
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struct snd_soc_component *component = codec_dai->component; |
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u16 iface = snd_soc_component_read(component, WM8728_IFCTL); |
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/* Currently only I2S is supported by the driver, though the |
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* hardware is more flexible. |
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*/ |
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switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) { |
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case SND_SOC_DAIFMT_I2S: |
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iface |= 1; |
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break; |
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default: |
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return -EINVAL; |
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} |
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/* The hardware only support full slave mode */ |
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switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) { |
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case SND_SOC_DAIFMT_CBS_CFS: |
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break; |
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default: |
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return -EINVAL; |
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} |
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switch (fmt & SND_SOC_DAIFMT_INV_MASK) { |
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case SND_SOC_DAIFMT_NB_NF: |
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iface &= ~0x22; |
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break; |
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case SND_SOC_DAIFMT_IB_NF: |
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iface |= 0x20; |
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iface &= ~0x02; |
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break; |
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case SND_SOC_DAIFMT_NB_IF: |
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iface |= 0x02; |
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iface &= ~0x20; |
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break; |
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case SND_SOC_DAIFMT_IB_IF: |
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iface |= 0x22; |
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break; |
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default: |
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return -EINVAL; |
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} |
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snd_soc_component_write(component, WM8728_IFCTL, iface); |
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return 0; |
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} |
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static int wm8728_set_bias_level(struct snd_soc_component *component, |
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enum snd_soc_bias_level level) |
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{ |
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struct wm8728_priv *wm8728 = snd_soc_component_get_drvdata(component); |
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u16 reg; |
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switch (level) { |
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case SND_SOC_BIAS_ON: |
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case SND_SOC_BIAS_PREPARE: |
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case SND_SOC_BIAS_STANDBY: |
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if (snd_soc_component_get_bias_level(component) == SND_SOC_BIAS_OFF) { |
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/* Power everything up... */ |
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reg = snd_soc_component_read(component, WM8728_DACCTL); |
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snd_soc_component_write(component, WM8728_DACCTL, reg & ~0x4); |
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/* ..then sync in the register cache. */ |
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regcache_sync(wm8728->regmap); |
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} |
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break; |
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case SND_SOC_BIAS_OFF: |
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reg = snd_soc_component_read(component, WM8728_DACCTL); |
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snd_soc_component_write(component, WM8728_DACCTL, reg | 0x4); |
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break; |
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} |
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return 0; |
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} |
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#define WM8728_RATES (SNDRV_PCM_RATE_8000_192000) |
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#define WM8728_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\ |
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SNDRV_PCM_FMTBIT_S24_LE) |
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static const struct snd_soc_dai_ops wm8728_dai_ops = { |
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.hw_params = wm8728_hw_params, |
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.mute_stream = wm8728_mute, |
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.set_fmt = wm8728_set_dai_fmt, |
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.no_capture_mute = 1, |
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}; |
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static struct snd_soc_dai_driver wm8728_dai = { |
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.name = "wm8728-hifi", |
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.playback = { |
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.stream_name = "Playback", |
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.channels_min = 2, |
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.channels_max = 2, |
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.rates = WM8728_RATES, |
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.formats = WM8728_FORMATS, |
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}, |
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.ops = &wm8728_dai_ops, |
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}; |
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static const struct snd_soc_component_driver soc_component_dev_wm8728 = { |
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.set_bias_level = wm8728_set_bias_level, |
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.controls = wm8728_snd_controls, |
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.num_controls = ARRAY_SIZE(wm8728_snd_controls), |
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.dapm_widgets = wm8728_dapm_widgets, |
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.num_dapm_widgets = ARRAY_SIZE(wm8728_dapm_widgets), |
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.dapm_routes = wm8728_intercon, |
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.num_dapm_routes = ARRAY_SIZE(wm8728_intercon), |
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.suspend_bias_off = 1, |
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.idle_bias_on = 1, |
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.use_pmdown_time = 1, |
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.endianness = 1, |
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.non_legacy_dai_naming = 1, |
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}; |
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static const struct of_device_id wm8728_of_match[] = { |
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{ .compatible = "wlf,wm8728", }, |
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{ } |
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}; |
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MODULE_DEVICE_TABLE(of, wm8728_of_match); |
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static const struct regmap_config wm8728_regmap = { |
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.reg_bits = 7, |
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.val_bits = 9, |
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.max_register = WM8728_IFCTL, |
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.reg_defaults = wm8728_reg_defaults, |
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.num_reg_defaults = ARRAY_SIZE(wm8728_reg_defaults), |
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.cache_type = REGCACHE_RBTREE, |
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}; |
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#if defined(CONFIG_SPI_MASTER) |
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static int wm8728_spi_probe(struct spi_device *spi) |
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{ |
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struct wm8728_priv *wm8728; |
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int ret; |
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wm8728 = devm_kzalloc(&spi->dev, sizeof(struct wm8728_priv), |
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GFP_KERNEL); |
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if (wm8728 == NULL) |
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return -ENOMEM; |
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wm8728->regmap = devm_regmap_init_spi(spi, &wm8728_regmap); |
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if (IS_ERR(wm8728->regmap)) |
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return PTR_ERR(wm8728->regmap); |
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spi_set_drvdata(spi, wm8728); |
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ret = devm_snd_soc_register_component(&spi->dev, |
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&soc_component_dev_wm8728, &wm8728_dai, 1); |
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return ret; |
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} |
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static struct spi_driver wm8728_spi_driver = { |
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.driver = { |
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.name = "wm8728", |
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.of_match_table = wm8728_of_match, |
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}, |
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.probe = wm8728_spi_probe, |
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}; |
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#endif /* CONFIG_SPI_MASTER */ |
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#if IS_ENABLED(CONFIG_I2C) |
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static int wm8728_i2c_probe(struct i2c_client *i2c, |
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const struct i2c_device_id *id) |
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{ |
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struct wm8728_priv *wm8728; |
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int ret; |
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wm8728 = devm_kzalloc(&i2c->dev, sizeof(struct wm8728_priv), |
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GFP_KERNEL); |
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if (wm8728 == NULL) |
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return -ENOMEM; |
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wm8728->regmap = devm_regmap_init_i2c(i2c, &wm8728_regmap); |
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if (IS_ERR(wm8728->regmap)) |
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return PTR_ERR(wm8728->regmap); |
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i2c_set_clientdata(i2c, wm8728); |
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ret = devm_snd_soc_register_component(&i2c->dev, |
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&soc_component_dev_wm8728, &wm8728_dai, 1); |
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return ret; |
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} |
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static const struct i2c_device_id wm8728_i2c_id[] = { |
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{ "wm8728", 0 }, |
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{ } |
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}; |
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MODULE_DEVICE_TABLE(i2c, wm8728_i2c_id); |
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static struct i2c_driver wm8728_i2c_driver = { |
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.driver = { |
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.name = "wm8728", |
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.of_match_table = wm8728_of_match, |
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}, |
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.probe = wm8728_i2c_probe, |
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.id_table = wm8728_i2c_id, |
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}; |
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#endif |
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static int __init wm8728_modinit(void) |
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{ |
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int ret = 0; |
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#if IS_ENABLED(CONFIG_I2C) |
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ret = i2c_add_driver(&wm8728_i2c_driver); |
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if (ret != 0) { |
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printk(KERN_ERR "Failed to register wm8728 I2C driver: %d\n", |
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ret); |
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} |
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#endif |
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#if defined(CONFIG_SPI_MASTER) |
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ret = spi_register_driver(&wm8728_spi_driver); |
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if (ret != 0) { |
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printk(KERN_ERR "Failed to register wm8728 SPI driver: %d\n", |
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ret); |
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} |
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#endif |
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return ret; |
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} |
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module_init(wm8728_modinit); |
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static void __exit wm8728_exit(void) |
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{ |
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#if IS_ENABLED(CONFIG_I2C) |
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i2c_del_driver(&wm8728_i2c_driver); |
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#endif |
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#if defined(CONFIG_SPI_MASTER) |
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spi_unregister_driver(&wm8728_spi_driver); |
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#endif |
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} |
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module_exit(wm8728_exit); |
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MODULE_DESCRIPTION("ASoC WM8728 driver"); |
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MODULE_AUTHOR("Mark Brown <[email protected]>"); |
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MODULE_LICENSE("GPL");
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