// SPDX-License-Identifier: GPL-2.0-only /* * wm8978.c -- WM8978 ALSA SoC Audio Codec driver * * Copyright (C) 2009-2010 Guennadi Liakhovetski <[email protected]> * Copyright (C) 2007 Carlos Munoz <[email protected]> * Copyright 2006-2009 Wolfson Microelectronics PLC. * Based on wm8974 and wm8990 by Liam Girdwood <[email protected]> */ #include <linux/module.h> #include <linux/moduleparam.h> #include <linux/kernel.h> #include <linux/init.h> #include <linux/delay.h> #include <linux/pm.h> #include <linux/i2c.h> #include <linux/regmap.h> #include <linux/slab.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 <asm/div64.h> #include "wm8978.h" static const struct reg_default wm8978_reg_defaults[] = …; static bool wm8978_volatile(struct device *dev, unsigned int reg) { … } /* codec private data */ struct wm8978_priv { … }; static const char *wm8978_companding[] = …; static const char *wm8978_eqmode[] = …; static const char *wm8978_bw[] = …; static const char *wm8978_eq1[] = …; static const char *wm8978_eq2[] = …; static const char *wm8978_eq3[] = …; static const char *wm8978_eq4[] = …; static const char *wm8978_eq5[] = …; static const char *wm8978_alc3[] = …; static const char *wm8978_alc1[] = …; static SOC_ENUM_SINGLE_DECL(adc_compand, WM8978_COMPANDING_CONTROL, 1, wm8978_companding); static SOC_ENUM_SINGLE_DECL(dac_compand, WM8978_COMPANDING_CONTROL, 3, wm8978_companding); static SOC_ENUM_SINGLE_DECL(eqmode, WM8978_EQ1, 8, wm8978_eqmode); static SOC_ENUM_SINGLE_DECL(eq1, WM8978_EQ1, 5, wm8978_eq1); static SOC_ENUM_SINGLE_DECL(eq2bw, WM8978_EQ2, 8, wm8978_bw); static SOC_ENUM_SINGLE_DECL(eq2, WM8978_EQ2, 5, wm8978_eq2); static SOC_ENUM_SINGLE_DECL(eq3bw, WM8978_EQ3, 8, wm8978_bw); static SOC_ENUM_SINGLE_DECL(eq3, WM8978_EQ3, 5, wm8978_eq3); static SOC_ENUM_SINGLE_DECL(eq4bw, WM8978_EQ4, 8, wm8978_bw); static SOC_ENUM_SINGLE_DECL(eq4, WM8978_EQ4, 5, wm8978_eq4); static SOC_ENUM_SINGLE_DECL(eq5, WM8978_EQ5, 5, wm8978_eq5); static SOC_ENUM_SINGLE_DECL(alc3, WM8978_ALC_CONTROL_3, 8, wm8978_alc3); static SOC_ENUM_SINGLE_DECL(alc1, WM8978_ALC_CONTROL_1, 7, wm8978_alc1); static const DECLARE_TLV_DB_SCALE(digital_tlv, -12750, 50, 1); static const DECLARE_TLV_DB_SCALE(eq_tlv, -1200, 100, 0); static const DECLARE_TLV_DB_SCALE(inpga_tlv, -1200, 75, 0); static const DECLARE_TLV_DB_SCALE(spk_tlv, -5700, 100, 0); static const DECLARE_TLV_DB_SCALE(boost_tlv, -1500, 300, 1); static const DECLARE_TLV_DB_SCALE(limiter_tlv, 0, 100, 0); static const struct snd_kcontrol_new wm8978_snd_controls[] = …; /* Mixer #1: Output (OUT1, OUT2) Mixer: mix AUX, Input mixer output and DAC */ static const struct snd_kcontrol_new wm8978_left_out_mixer[] = …; static const struct snd_kcontrol_new wm8978_right_out_mixer[] = …; /* OUT3/OUT4 Mixer not implemented */ /* Mixer #2: Input PGA Mute */ static const struct snd_kcontrol_new wm8978_left_input_mixer[] = …; static const struct snd_kcontrol_new wm8978_right_input_mixer[] = …; static const struct snd_soc_dapm_widget wm8978_dapm_widgets[] = …; static const struct snd_soc_dapm_route wm8978_dapm_routes[] = …; /* PLL divisors */ struct wm8978_pll_div { … }; #define FIXED_PLL_SIZE … static void pll_factors(struct snd_soc_component *component, struct wm8978_pll_div *pll_div, unsigned int target, unsigned int source) { … } /* MCLK dividers */ static const int mclk_numerator[] = …; static const int mclk_denominator[] = …; /* * find index >= idx, such that, for a given f_out, * 3 * f_mclk / 4 <= f_PLLOUT < 13 * f_mclk / 4 * f_out can be f_256fs or f_opclk, currently only used for f_256fs. Can be * generalised for f_opclk with suitable coefficient arrays, but currently * the OPCLK divisor is calculated directly, not iteratively. */ static int wm8978_enum_mclk(unsigned int f_out, unsigned int f_mclk, unsigned int *f_pllout) { … } /* * Calculate internal frequencies and dividers, according to Figure 40 * "PLL and Clock Select Circuit" in WM8978 datasheet Rev. 2.6 */ static int wm8978_configure_pll(struct snd_soc_component *component) { … } /* * Configure WM8978 clock dividers. */ static int wm8978_set_dai_clkdiv(struct snd_soc_dai *codec_dai, int div_id, int div) { … } /* * @freq: when .set_pll() us not used, freq is codec MCLK input frequency */ static int wm8978_set_dai_sysclk(struct snd_soc_dai *codec_dai, int clk_id, unsigned int freq, int dir) { … } /* * Set ADC and Voice DAC format. */ static int wm8978_set_dai_fmt(struct snd_soc_dai *codec_dai, unsigned int fmt) { … } /* * Set PCM DAI bit size and sample rate. */ static int wm8978_hw_params(struct snd_pcm_substream *substream, struct snd_pcm_hw_params *params, struct snd_soc_dai *dai) { … } static int wm8978_mute(struct snd_soc_dai *dai, int mute, int direction) { … } static int wm8978_set_bias_level(struct snd_soc_component *component, enum snd_soc_bias_level level) { … } #define WM8978_FORMATS … static const struct snd_soc_dai_ops wm8978_dai_ops = …; /* Also supports 12kHz */ static struct snd_soc_dai_driver wm8978_dai = …; static int wm8978_suspend(struct snd_soc_component *component) { … } static int wm8978_resume(struct snd_soc_component *component) { … } /* * These registers contain an "update" bit - bit 8. This means, for example, * that one can write new DAC digital volume for both channels, but only when * the update bit is set, will also the volume be updated - simultaneously for * both channels. */ static const int update_reg[] = …; static int wm8978_probe(struct snd_soc_component *component) { … } static const struct snd_soc_component_driver soc_component_dev_wm8978 = …; static const struct regmap_config wm8978_regmap_config = …; static int wm8978_i2c_probe(struct i2c_client *i2c) { … } static const struct i2c_device_id wm8978_i2c_id[] = …; MODULE_DEVICE_TABLE(i2c, wm8978_i2c_id); static const struct of_device_id wm8978_of_match[] = …; MODULE_DEVICE_TABLE(of, wm8978_of_match); static struct i2c_driver wm8978_i2c_driver = …; module_i2c_driver(…) …; MODULE_DESCRIPTION(…) …; MODULE_AUTHOR(…) …; MODULE_LICENSE(…) …;
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