651 lines
16 KiB
C
651 lines
16 KiB
C
/*
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* wm8741.c -- WM8741 ALSA SoC Audio driver
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*
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* Copyright 2010-1 Wolfson Microelectronics plc
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*
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* Author: Ian Lartey <ian@opensource.wolfsonmicro.com>
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*
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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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/spi/spi.h>
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#include <linux/regmap.h>
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#include <linux/regulator/consumer.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 "wm8741.h"
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#define WM8741_NUM_SUPPLIES 2
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static const char *wm8741_supply_names[WM8741_NUM_SUPPLIES] = {
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"AVDD",
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"DVDD",
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};
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#define WM8741_NUM_RATES 6
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/* codec private data */
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struct wm8741_priv {
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struct regmap *regmap;
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struct regulator_bulk_data supplies[WM8741_NUM_SUPPLIES];
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unsigned int sysclk;
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struct snd_pcm_hw_constraint_list *sysclk_constraints;
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};
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static const struct reg_default wm8741_reg_defaults[] = {
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{ 0, 0x0000 }, /* R0 - DACLLSB Attenuation */
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{ 1, 0x0000 }, /* R1 - DACLMSB Attenuation */
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{ 2, 0x0000 }, /* R2 - DACRLSB Attenuation */
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{ 3, 0x0000 }, /* R3 - DACRMSB Attenuation */
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{ 4, 0x0000 }, /* R4 - Volume Control */
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{ 5, 0x000A }, /* R5 - Format Control */
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{ 6, 0x0000 }, /* R6 - Filter Control */
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{ 7, 0x0000 }, /* R7 - Mode Control 1 */
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{ 8, 0x0002 }, /* R8 - Mode Control 2 */
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{ 32, 0x0002 }, /* R32 - ADDITONAL_CONTROL_1 */
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};
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static bool wm8741_readable(struct device *dev, unsigned int reg)
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{
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switch (reg) {
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case WM8741_DACLLSB_ATTENUATION:
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case WM8741_DACLMSB_ATTENUATION:
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case WM8741_DACRLSB_ATTENUATION:
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case WM8741_DACRMSB_ATTENUATION:
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case WM8741_VOLUME_CONTROL:
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case WM8741_FORMAT_CONTROL:
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case WM8741_FILTER_CONTROL:
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case WM8741_MODE_CONTROL_1:
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case WM8741_MODE_CONTROL_2:
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case WM8741_ADDITIONAL_CONTROL_1:
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return true;
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default:
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return false;
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}
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}
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static int wm8741_reset(struct snd_soc_codec *codec)
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{
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return snd_soc_write(codec, WM8741_RESET, 0);
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}
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static const DECLARE_TLV_DB_SCALE(dac_tlv_fine, -12700, 13, 0);
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static const DECLARE_TLV_DB_SCALE(dac_tlv, -12700, 400, 0);
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static const struct snd_kcontrol_new wm8741_snd_controls[] = {
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SOC_DOUBLE_R_TLV("Fine Playback Volume", WM8741_DACLLSB_ATTENUATION,
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WM8741_DACRLSB_ATTENUATION, 1, 255, 1, dac_tlv_fine),
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SOC_DOUBLE_R_TLV("Playback Volume", WM8741_DACLMSB_ATTENUATION,
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WM8741_DACRMSB_ATTENUATION, 0, 511, 1, dac_tlv),
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};
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static const struct snd_soc_dapm_widget wm8741_dapm_widgets[] = {
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SND_SOC_DAPM_DAC("DACL", "Playback", SND_SOC_NOPM, 0, 0),
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SND_SOC_DAPM_DAC("DACR", "Playback", SND_SOC_NOPM, 0, 0),
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SND_SOC_DAPM_OUTPUT("VOUTLP"),
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SND_SOC_DAPM_OUTPUT("VOUTLN"),
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SND_SOC_DAPM_OUTPUT("VOUTRP"),
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SND_SOC_DAPM_OUTPUT("VOUTRN"),
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};
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static const struct snd_soc_dapm_route wm8741_dapm_routes[] = {
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{ "VOUTLP", NULL, "DACL" },
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{ "VOUTLN", NULL, "DACL" },
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{ "VOUTRP", NULL, "DACR" },
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{ "VOUTRN", NULL, "DACR" },
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};
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static struct {
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int value;
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int ratio;
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} lrclk_ratios[WM8741_NUM_RATES] = {
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{ 1, 128 },
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{ 2, 192 },
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{ 3, 256 },
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{ 4, 384 },
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{ 5, 512 },
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{ 6, 768 },
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};
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static unsigned int rates_11289[] = {
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44100, 88235,
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};
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static struct snd_pcm_hw_constraint_list constraints_11289 = {
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.count = ARRAY_SIZE(rates_11289),
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.list = rates_11289,
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};
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static unsigned int rates_12288[] = {
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32000, 48000, 96000,
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};
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static struct snd_pcm_hw_constraint_list constraints_12288 = {
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.count = ARRAY_SIZE(rates_12288),
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.list = rates_12288,
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};
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static unsigned int rates_16384[] = {
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32000,
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};
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static struct snd_pcm_hw_constraint_list constraints_16384 = {
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.count = ARRAY_SIZE(rates_16384),
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.list = rates_16384,
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};
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static unsigned int rates_16934[] = {
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44100, 88235,
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};
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static struct snd_pcm_hw_constraint_list constraints_16934 = {
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.count = ARRAY_SIZE(rates_16934),
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.list = rates_16934,
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};
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static unsigned int rates_18432[] = {
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48000, 96000,
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};
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static struct snd_pcm_hw_constraint_list constraints_18432 = {
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.count = ARRAY_SIZE(rates_18432),
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.list = rates_18432,
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};
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static unsigned int rates_22579[] = {
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44100, 88235, 1764000
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};
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static struct snd_pcm_hw_constraint_list constraints_22579 = {
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.count = ARRAY_SIZE(rates_22579),
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.list = rates_22579,
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};
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static unsigned int rates_24576[] = {
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32000, 48000, 96000, 192000
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};
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static struct snd_pcm_hw_constraint_list constraints_24576 = {
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.count = ARRAY_SIZE(rates_24576),
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.list = rates_24576,
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};
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static unsigned int rates_36864[] = {
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48000, 96000, 19200
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};
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static struct snd_pcm_hw_constraint_list constraints_36864 = {
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.count = ARRAY_SIZE(rates_36864),
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.list = rates_36864,
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};
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static int wm8741_startup(struct snd_pcm_substream *substream,
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struct snd_soc_dai *dai)
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{
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struct snd_soc_codec *codec = dai->codec;
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struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
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/* The set of sample rates that can be supported depends on the
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* MCLK supplied to the CODEC - enforce this.
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*/
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if (!wm8741->sysclk) {
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dev_err(codec->dev,
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"No MCLK configured, call set_sysclk() on init\n");
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return -EINVAL;
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}
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snd_pcm_hw_constraint_list(substream->runtime, 0,
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SNDRV_PCM_HW_PARAM_RATE,
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wm8741->sysclk_constraints);
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return 0;
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}
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static int wm8741_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_codec *codec = dai->codec;
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struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
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u16 iface = snd_soc_read(codec, WM8741_FORMAT_CONTROL) & 0x1FC;
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int i;
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/* Find a supported LRCLK ratio */
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for (i = 0; i < ARRAY_SIZE(lrclk_ratios); i++) {
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if (wm8741->sysclk / params_rate(params) ==
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lrclk_ratios[i].ratio)
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break;
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}
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/* Should never happen, should be handled by constraints */
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if (i == ARRAY_SIZE(lrclk_ratios)) {
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dev_err(codec->dev, "MCLK/fs ratio %d unsupported\n",
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wm8741->sysclk / params_rate(params));
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return -EINVAL;
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}
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/* bit size */
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switch (params_format(params)) {
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case SNDRV_PCM_FORMAT_S16_LE:
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break;
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case SNDRV_PCM_FORMAT_S20_3LE:
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iface |= 0x0001;
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break;
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case SNDRV_PCM_FORMAT_S24_LE:
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iface |= 0x0002;
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break;
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case SNDRV_PCM_FORMAT_S32_LE:
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iface |= 0x0003;
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break;
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default:
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dev_dbg(codec->dev, "wm8741_hw_params: Unsupported bit size param = %d",
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params_format(params));
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return -EINVAL;
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}
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dev_dbg(codec->dev, "wm8741_hw_params: bit size param = %d",
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params_format(params));
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snd_soc_write(codec, WM8741_FORMAT_CONTROL, iface);
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return 0;
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}
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static int wm8741_set_dai_sysclk(struct snd_soc_dai *codec_dai,
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int clk_id, unsigned int freq, int dir)
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{
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struct snd_soc_codec *codec = codec_dai->codec;
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struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
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dev_dbg(codec->dev, "wm8741_set_dai_sysclk info: freq=%dHz\n", freq);
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switch (freq) {
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case 11289600:
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wm8741->sysclk_constraints = &constraints_11289;
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wm8741->sysclk = freq;
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return 0;
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case 12288000:
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wm8741->sysclk_constraints = &constraints_12288;
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wm8741->sysclk = freq;
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return 0;
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case 16384000:
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wm8741->sysclk_constraints = &constraints_16384;
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wm8741->sysclk = freq;
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return 0;
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case 16934400:
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wm8741->sysclk_constraints = &constraints_16934;
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wm8741->sysclk = freq;
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return 0;
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case 18432000:
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wm8741->sysclk_constraints = &constraints_18432;
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wm8741->sysclk = freq;
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return 0;
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case 22579200:
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case 33868800:
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wm8741->sysclk_constraints = &constraints_22579;
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wm8741->sysclk = freq;
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return 0;
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case 24576000:
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wm8741->sysclk_constraints = &constraints_24576;
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wm8741->sysclk = freq;
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return 0;
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case 36864000:
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wm8741->sysclk_constraints = &constraints_36864;
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wm8741->sysclk = freq;
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return 0;
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}
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return -EINVAL;
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}
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static int wm8741_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_codec *codec = codec_dai->codec;
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u16 iface = snd_soc_read(codec, WM8741_FORMAT_CONTROL) & 0x1C3;
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/* check master/slave audio interface */
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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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/* interface format */
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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 |= 0x0008;
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break;
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case SND_SOC_DAIFMT_RIGHT_J:
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break;
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case SND_SOC_DAIFMT_LEFT_J:
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iface |= 0x0004;
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break;
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case SND_SOC_DAIFMT_DSP_A:
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iface |= 0x000C;
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break;
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case SND_SOC_DAIFMT_DSP_B:
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iface |= 0x001C;
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break;
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default:
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return -EINVAL;
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}
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/* clock inversion */
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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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break;
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case SND_SOC_DAIFMT_IB_IF:
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iface |= 0x0010;
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break;
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case SND_SOC_DAIFMT_IB_NF:
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iface |= 0x0020;
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break;
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case SND_SOC_DAIFMT_NB_IF:
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iface |= 0x0030;
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break;
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default:
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return -EINVAL;
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}
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dev_dbg(codec->dev, "wm8741_set_dai_fmt: Format=%x, Clock Inv=%x\n",
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fmt & SND_SOC_DAIFMT_FORMAT_MASK,
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((fmt & SND_SOC_DAIFMT_INV_MASK)));
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snd_soc_write(codec, WM8741_FORMAT_CONTROL, iface);
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return 0;
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}
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#define WM8741_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
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SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 | \
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SNDRV_PCM_RATE_96000 | SNDRV_PCM_RATE_176400 | \
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SNDRV_PCM_RATE_192000)
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#define WM8741_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
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SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
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static const struct snd_soc_dai_ops wm8741_dai_ops = {
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.startup = wm8741_startup,
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.hw_params = wm8741_hw_params,
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.set_sysclk = wm8741_set_dai_sysclk,
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.set_fmt = wm8741_set_dai_fmt,
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};
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static struct snd_soc_dai_driver wm8741_dai = {
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.name = "wm8741",
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.playback = {
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.stream_name = "Playback",
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.channels_min = 2, /* Mono modes not yet supported */
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.channels_max = 2,
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.rates = WM8741_RATES,
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.formats = WM8741_FORMATS,
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},
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.ops = &wm8741_dai_ops,
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};
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#ifdef CONFIG_PM
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static int wm8741_resume(struct snd_soc_codec *codec)
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{
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snd_soc_cache_sync(codec);
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return 0;
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}
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#else
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#define wm8741_suspend NULL
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#define wm8741_resume NULL
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#endif
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static int wm8741_probe(struct snd_soc_codec *codec)
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{
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struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
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int ret = 0;
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ret = regulator_bulk_enable(ARRAY_SIZE(wm8741->supplies),
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wm8741->supplies);
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if (ret != 0) {
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dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
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goto err_get;
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}
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ret = snd_soc_codec_set_cache_io(codec, 7, 9, SND_SOC_REGMAP);
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if (ret != 0) {
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dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
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goto err_enable;
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}
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ret = wm8741_reset(codec);
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if (ret < 0) {
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dev_err(codec->dev, "Failed to issue reset\n");
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goto err_enable;
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}
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/* Change some default settings - latch VU */
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snd_soc_update_bits(codec, WM8741_DACLLSB_ATTENUATION,
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WM8741_UPDATELL, WM8741_UPDATELL);
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snd_soc_update_bits(codec, WM8741_DACLMSB_ATTENUATION,
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WM8741_UPDATELM, WM8741_UPDATELM);
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snd_soc_update_bits(codec, WM8741_DACRLSB_ATTENUATION,
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WM8741_UPDATERL, WM8741_UPDATERL);
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snd_soc_update_bits(codec, WM8741_DACRMSB_ATTENUATION,
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WM8741_UPDATERM, WM8741_UPDATERM);
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dev_dbg(codec->dev, "Successful registration\n");
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return ret;
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err_enable:
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regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
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err_get:
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return ret;
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}
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static int wm8741_remove(struct snd_soc_codec *codec)
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{
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struct wm8741_priv *wm8741 = snd_soc_codec_get_drvdata(codec);
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regulator_bulk_disable(ARRAY_SIZE(wm8741->supplies), wm8741->supplies);
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return 0;
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}
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static struct snd_soc_codec_driver soc_codec_dev_wm8741 = {
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.probe = wm8741_probe,
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.remove = wm8741_remove,
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.resume = wm8741_resume,
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.controls = wm8741_snd_controls,
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.num_controls = ARRAY_SIZE(wm8741_snd_controls),
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.dapm_widgets = wm8741_dapm_widgets,
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.num_dapm_widgets = ARRAY_SIZE(wm8741_dapm_widgets),
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.dapm_routes = wm8741_dapm_routes,
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.num_dapm_routes = ARRAY_SIZE(wm8741_dapm_routes),
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};
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static const struct of_device_id wm8741_of_match[] = {
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{ .compatible = "wlf,wm8741", },
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{ }
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};
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MODULE_DEVICE_TABLE(of, wm8741_of_match);
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static const struct regmap_config wm8741_regmap = {
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.reg_bits = 7,
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.val_bits = 9,
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.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 defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
|
|
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 = 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 __devinit 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 = 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 __devexit 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 = __devexit_p(wm8741_spi_remove),
|
|
};
|
|
#endif /* CONFIG_SPI_MASTER */
|
|
|
|
static int __init wm8741_modinit(void)
|
|
{
|
|
int ret = 0;
|
|
|
|
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
|
|
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 defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
|
|
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");
|