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699 lines
17 KiB
C
699 lines
17 KiB
C
/*
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* wm8523.c -- WM8523 ALSA SoC Audio driver
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*
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* Copyright 2009 Wolfson Microelectronics plc
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*
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* Author: Mark Brown <broonie@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/platform_device.h>
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#include <linux/regulator/consumer.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/soc-dapm.h>
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#include <sound/initval.h>
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#include <sound/tlv.h>
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#include "wm8523.h"
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static struct snd_soc_codec *wm8523_codec;
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struct snd_soc_codec_device soc_codec_dev_wm8523;
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#define WM8523_NUM_SUPPLIES 2
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static const char *wm8523_supply_names[WM8523_NUM_SUPPLIES] = {
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"AVDD",
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"LINEVDD",
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};
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#define WM8523_NUM_RATES 7
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/* codec private data */
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struct wm8523_priv {
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struct snd_soc_codec codec;
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u16 reg_cache[WM8523_REGISTER_COUNT];
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struct regulator_bulk_data supplies[WM8523_NUM_SUPPLIES];
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unsigned int sysclk;
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unsigned int rate_constraint_list[WM8523_NUM_RATES];
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struct snd_pcm_hw_constraint_list rate_constraint;
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};
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static const u16 wm8523_reg[WM8523_REGISTER_COUNT] = {
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0x8523, /* R0 - DEVICE_ID */
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0x0001, /* R1 - REVISION */
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0x0000, /* R2 - PSCTRL1 */
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0x1812, /* R3 - AIF_CTRL1 */
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0x0000, /* R4 - AIF_CTRL2 */
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0x0001, /* R5 - DAC_CTRL3 */
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0x0190, /* R6 - DAC_GAINL */
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0x0190, /* R7 - DAC_GAINR */
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0x0000, /* R8 - ZERO_DETECT */
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};
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static int wm8523_volatile_register(unsigned int reg)
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{
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switch (reg) {
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case WM8523_DEVICE_ID:
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case WM8523_REVISION:
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return 1;
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default:
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return 0;
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}
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}
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static int wm8523_reset(struct snd_soc_codec *codec)
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{
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return snd_soc_write(codec, WM8523_DEVICE_ID, 0);
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}
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static const DECLARE_TLV_DB_SCALE(dac_tlv, -10000, 25, 0);
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static const char *wm8523_zd_count_text[] = {
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"1024",
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"2048",
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};
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static const struct soc_enum wm8523_zc_count =
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SOC_ENUM_SINGLE(WM8523_ZERO_DETECT, 0, 2, wm8523_zd_count_text);
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static const struct snd_kcontrol_new wm8523_snd_controls[] = {
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SOC_DOUBLE_R_TLV("Playback Volume", WM8523_DAC_GAINL, WM8523_DAC_GAINR,
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0, 448, 0, dac_tlv),
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SOC_SINGLE("ZC Switch", WM8523_DAC_CTRL3, 4, 1, 0),
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SOC_SINGLE("Playback Deemphasis Switch", WM8523_AIF_CTRL1, 8, 1, 0),
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SOC_DOUBLE("Playback Switch", WM8523_DAC_CTRL3, 2, 3, 1, 1),
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SOC_SINGLE("Volume Ramp Up Switch", WM8523_DAC_CTRL3, 1, 1, 0),
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SOC_SINGLE("Volume Ramp Down Switch", WM8523_DAC_CTRL3, 0, 1, 0),
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SOC_ENUM("Zero Detect Count", wm8523_zc_count),
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};
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static const struct snd_soc_dapm_widget wm8523_dapm_widgets[] = {
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SND_SOC_DAPM_DAC("DAC", "Playback", SND_SOC_NOPM, 0, 0),
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SND_SOC_DAPM_OUTPUT("LINEVOUTL"),
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SND_SOC_DAPM_OUTPUT("LINEVOUTR"),
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};
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static const struct snd_soc_dapm_route intercon[] = {
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{ "LINEVOUTL", NULL, "DAC" },
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{ "LINEVOUTR", NULL, "DAC" },
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};
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static int wm8523_add_widgets(struct snd_soc_codec *codec)
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{
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snd_soc_dapm_new_controls(codec, wm8523_dapm_widgets,
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ARRAY_SIZE(wm8523_dapm_widgets));
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snd_soc_dapm_add_routes(codec, intercon, ARRAY_SIZE(intercon));
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snd_soc_dapm_new_widgets(codec);
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return 0;
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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[WM8523_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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{ 7, 1152 },
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};
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static int wm8523_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 wm8523_priv *wm8523 = codec->private_data;
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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 (!wm8523->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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return 0;
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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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&wm8523->rate_constraint);
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return 0;
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}
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static int wm8523_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_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_device *socdev = rtd->socdev;
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struct snd_soc_codec *codec = socdev->card->codec;
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struct wm8523_priv *wm8523 = codec->private_data;
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int i;
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u16 aifctrl1 = snd_soc_read(codec, WM8523_AIF_CTRL1);
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u16 aifctrl2 = snd_soc_read(codec, WM8523_AIF_CTRL2);
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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 (wm8523->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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wm8523->sysclk / params_rate(params));
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return -EINVAL;
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}
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aifctrl2 &= ~WM8523_SR_MASK;
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aifctrl2 |= lrclk_ratios[i].value;
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aifctrl1 &= ~WM8523_WL_MASK;
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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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aifctrl1 |= 0x8;
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break;
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case SNDRV_PCM_FORMAT_S24_LE:
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aifctrl1 |= 0x10;
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break;
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case SNDRV_PCM_FORMAT_S32_LE:
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aifctrl1 |= 0x18;
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break;
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}
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snd_soc_write(codec, WM8523_AIF_CTRL1, aifctrl1);
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snd_soc_write(codec, WM8523_AIF_CTRL2, aifctrl2);
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return 0;
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}
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static int wm8523_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 wm8523_priv *wm8523 = codec->private_data;
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unsigned int val;
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int i;
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wm8523->sysclk = freq;
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wm8523->rate_constraint.count = 0;
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for (i = 0; i < ARRAY_SIZE(lrclk_ratios); i++) {
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val = freq / lrclk_ratios[i].ratio;
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/* Check that it's a standard rate since core can't
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* cope with others and having the odd rates confuses
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* constraint matching.
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*/
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switch (val) {
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case 8000:
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case 11025:
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case 16000:
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case 22050:
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case 32000:
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case 44100:
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case 48000:
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case 64000:
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case 88200:
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case 96000:
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case 176400:
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case 192000:
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dev_dbg(codec->dev, "Supported sample rate: %dHz\n",
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val);
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wm8523->rate_constraint_list[i] = val;
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wm8523->rate_constraint.count++;
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break;
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default:
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dev_dbg(codec->dev, "Skipping sample rate: %dHz\n",
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val);
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}
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}
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/* Need at least one supported rate... */
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if (wm8523->rate_constraint.count == 0)
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return -EINVAL;
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return 0;
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}
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static int wm8523_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 aifctrl1 = snd_soc_read(codec, WM8523_AIF_CTRL1);
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aifctrl1 &= ~(WM8523_BCLK_INV_MASK | WM8523_LRCLK_INV_MASK |
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WM8523_FMT_MASK | WM8523_AIF_MSTR_MASK);
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switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
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case SND_SOC_DAIFMT_CBM_CFM:
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aifctrl1 |= WM8523_AIF_MSTR;
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break;
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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_FORMAT_MASK) {
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case SND_SOC_DAIFMT_I2S:
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aifctrl1 |= 0x0002;
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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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aifctrl1 |= 0x0001;
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break;
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case SND_SOC_DAIFMT_DSP_A:
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aifctrl1 |= 0x0003;
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break;
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case SND_SOC_DAIFMT_DSP_B:
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aifctrl1 |= 0x0023;
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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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break;
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case SND_SOC_DAIFMT_IB_IF:
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aifctrl1 |= WM8523_BCLK_INV | WM8523_LRCLK_INV;
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break;
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case SND_SOC_DAIFMT_IB_NF:
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aifctrl1 |= WM8523_BCLK_INV;
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break;
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case SND_SOC_DAIFMT_NB_IF:
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aifctrl1 |= WM8523_LRCLK_INV;
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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_write(codec, WM8523_AIF_CTRL1, aifctrl1);
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return 0;
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}
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static int wm8523_set_bias_level(struct snd_soc_codec *codec,
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enum snd_soc_bias_level level)
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{
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struct wm8523_priv *wm8523 = codec->private_data;
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int ret, i;
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switch (level) {
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case SND_SOC_BIAS_ON:
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break;
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case SND_SOC_BIAS_PREPARE:
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/* Full power on */
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snd_soc_update_bits(codec, WM8523_PSCTRL1,
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WM8523_SYS_ENA_MASK, 3);
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break;
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case SND_SOC_BIAS_STANDBY:
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if (codec->bias_level == SND_SOC_BIAS_OFF) {
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ret = regulator_bulk_enable(ARRAY_SIZE(wm8523->supplies),
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wm8523->supplies);
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if (ret != 0) {
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dev_err(codec->dev,
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"Failed to enable supplies: %d\n",
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ret);
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return ret;
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}
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/* Initial power up */
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snd_soc_update_bits(codec, WM8523_PSCTRL1,
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WM8523_SYS_ENA_MASK, 1);
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/* Sync back default/cached values */
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for (i = WM8523_AIF_CTRL1;
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i < WM8523_MAX_REGISTER; i++)
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snd_soc_write(codec, i, wm8523->reg_cache[i]);
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msleep(100);
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}
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/* Power up to mute */
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snd_soc_update_bits(codec, WM8523_PSCTRL1,
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WM8523_SYS_ENA_MASK, 2);
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break;
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case SND_SOC_BIAS_OFF:
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/* The chip runs through the power down sequence for us. */
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snd_soc_update_bits(codec, WM8523_PSCTRL1,
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WM8523_SYS_ENA_MASK, 0);
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msleep(100);
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regulator_bulk_disable(ARRAY_SIZE(wm8523->supplies),
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wm8523->supplies);
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break;
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}
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codec->bias_level = level;
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return 0;
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}
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#define WM8523_RATES SNDRV_PCM_RATE_8000_192000
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#define WM8523_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 struct snd_soc_dai_ops wm8523_dai_ops = {
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.startup = wm8523_startup,
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.hw_params = wm8523_hw_params,
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.set_sysclk = wm8523_set_dai_sysclk,
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.set_fmt = wm8523_set_dai_fmt,
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};
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struct snd_soc_dai wm8523_dai = {
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.name = "WM8523",
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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 = WM8523_RATES,
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.formats = WM8523_FORMATS,
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},
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.ops = &wm8523_dai_ops,
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};
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EXPORT_SYMBOL_GPL(wm8523_dai);
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#ifdef CONFIG_PM
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static int wm8523_suspend(struct platform_device *pdev, pm_message_t state)
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{
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struct snd_soc_device *socdev = platform_get_drvdata(pdev);
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struct snd_soc_codec *codec = socdev->card->codec;
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wm8523_set_bias_level(codec, SND_SOC_BIAS_OFF);
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return 0;
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}
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static int wm8523_resume(struct platform_device *pdev)
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{
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struct snd_soc_device *socdev = platform_get_drvdata(pdev);
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struct snd_soc_codec *codec = socdev->card->codec;
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wm8523_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
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return 0;
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}
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#else
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#define wm8523_suspend NULL
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#define wm8523_resume NULL
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#endif
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static int wm8523_probe(struct platform_device *pdev)
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{
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struct snd_soc_device *socdev = platform_get_drvdata(pdev);
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struct snd_soc_codec *codec;
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int ret = 0;
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if (wm8523_codec == NULL) {
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dev_err(&pdev->dev, "Codec device not registered\n");
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return -ENODEV;
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}
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socdev->card->codec = wm8523_codec;
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codec = wm8523_codec;
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/* register pcms */
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ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
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if (ret < 0) {
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dev_err(codec->dev, "failed to create pcms: %d\n", ret);
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goto pcm_err;
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}
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snd_soc_add_controls(codec, wm8523_snd_controls,
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ARRAY_SIZE(wm8523_snd_controls));
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wm8523_add_widgets(codec);
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ret = snd_soc_init_card(socdev);
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if (ret < 0) {
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dev_err(codec->dev, "failed to register card: %d\n", ret);
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goto card_err;
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}
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return ret;
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card_err:
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snd_soc_free_pcms(socdev);
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snd_soc_dapm_free(socdev);
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pcm_err:
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return ret;
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}
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static int wm8523_remove(struct platform_device *pdev)
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{
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struct snd_soc_device *socdev = platform_get_drvdata(pdev);
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snd_soc_free_pcms(socdev);
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snd_soc_dapm_free(socdev);
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return 0;
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}
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struct snd_soc_codec_device soc_codec_dev_wm8523 = {
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.probe = wm8523_probe,
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.remove = wm8523_remove,
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.suspend = wm8523_suspend,
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.resume = wm8523_resume,
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};
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EXPORT_SYMBOL_GPL(soc_codec_dev_wm8523);
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static int wm8523_register(struct wm8523_priv *wm8523,
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enum snd_soc_control_type control)
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{
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int ret;
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struct snd_soc_codec *codec = &wm8523->codec;
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int i;
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if (wm8523_codec) {
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dev_err(codec->dev, "Another WM8523 is registered\n");
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return -EINVAL;
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}
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mutex_init(&codec->mutex);
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INIT_LIST_HEAD(&codec->dapm_widgets);
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INIT_LIST_HEAD(&codec->dapm_paths);
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|
|
codec->private_data = wm8523;
|
|
codec->name = "WM8523";
|
|
codec->owner = THIS_MODULE;
|
|
codec->bias_level = SND_SOC_BIAS_OFF;
|
|
codec->set_bias_level = wm8523_set_bias_level;
|
|
codec->dai = &wm8523_dai;
|
|
codec->num_dai = 1;
|
|
codec->reg_cache_size = WM8523_REGISTER_COUNT;
|
|
codec->reg_cache = &wm8523->reg_cache;
|
|
codec->volatile_register = wm8523_volatile_register;
|
|
|
|
wm8523->rate_constraint.list = &wm8523->rate_constraint_list[0];
|
|
wm8523->rate_constraint.count =
|
|
ARRAY_SIZE(wm8523->rate_constraint_list);
|
|
|
|
memcpy(codec->reg_cache, wm8523_reg, sizeof(wm8523_reg));
|
|
|
|
ret = snd_soc_codec_set_cache_io(codec, 8, 16, control);
|
|
if (ret != 0) {
|
|
dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
|
|
goto err;
|
|
}
|
|
|
|
for (i = 0; i < ARRAY_SIZE(wm8523->supplies); i++)
|
|
wm8523->supplies[i].supply = wm8523_supply_names[i];
|
|
|
|
ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8523->supplies),
|
|
wm8523->supplies);
|
|
if (ret != 0) {
|
|
dev_err(codec->dev, "Failed to request supplies: %d\n", ret);
|
|
goto err;
|
|
}
|
|
|
|
ret = regulator_bulk_enable(ARRAY_SIZE(wm8523->supplies),
|
|
wm8523->supplies);
|
|
if (ret != 0) {
|
|
dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
|
|
goto err_get;
|
|
}
|
|
|
|
ret = snd_soc_read(codec, WM8523_DEVICE_ID);
|
|
if (ret < 0) {
|
|
dev_err(codec->dev, "Failed to read ID register\n");
|
|
goto err_enable;
|
|
}
|
|
if (ret != wm8523_reg[WM8523_DEVICE_ID]) {
|
|
dev_err(codec->dev, "Device is not a WM8523, ID is %x\n", ret);
|
|
ret = -EINVAL;
|
|
goto err_enable;
|
|
}
|
|
|
|
ret = snd_soc_read(codec, WM8523_REVISION);
|
|
if (ret < 0) {
|
|
dev_err(codec->dev, "Failed to read revision register\n");
|
|
goto err_enable;
|
|
}
|
|
dev_info(codec->dev, "revision %c\n",
|
|
(ret & WM8523_CHIP_REV_MASK) + 'A');
|
|
|
|
ret = wm8523_reset(codec);
|
|
if (ret < 0) {
|
|
dev_err(codec->dev, "Failed to issue reset\n");
|
|
goto err_enable;
|
|
}
|
|
|
|
wm8523_dai.dev = codec->dev;
|
|
|
|
/* Change some default settings - latch VU and enable ZC */
|
|
wm8523->reg_cache[WM8523_DAC_GAINR] |= WM8523_DACR_VU;
|
|
wm8523->reg_cache[WM8523_DAC_CTRL3] |= WM8523_ZC;
|
|
|
|
wm8523_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
|
|
|
|
/* Bias level configuration will have done an extra enable */
|
|
regulator_bulk_disable(ARRAY_SIZE(wm8523->supplies), wm8523->supplies);
|
|
|
|
wm8523_codec = codec;
|
|
|
|
ret = snd_soc_register_codec(codec);
|
|
if (ret != 0) {
|
|
dev_err(codec->dev, "Failed to register codec: %d\n", ret);
|
|
return ret;
|
|
}
|
|
|
|
ret = snd_soc_register_dai(&wm8523_dai);
|
|
if (ret != 0) {
|
|
dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
|
|
snd_soc_unregister_codec(codec);
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_enable:
|
|
regulator_bulk_disable(ARRAY_SIZE(wm8523->supplies), wm8523->supplies);
|
|
err_get:
|
|
regulator_bulk_free(ARRAY_SIZE(wm8523->supplies), wm8523->supplies);
|
|
err:
|
|
kfree(wm8523);
|
|
return ret;
|
|
}
|
|
|
|
static void wm8523_unregister(struct wm8523_priv *wm8523)
|
|
{
|
|
wm8523_set_bias_level(&wm8523->codec, SND_SOC_BIAS_OFF);
|
|
regulator_bulk_free(ARRAY_SIZE(wm8523->supplies), wm8523->supplies);
|
|
snd_soc_unregister_dai(&wm8523_dai);
|
|
snd_soc_unregister_codec(&wm8523->codec);
|
|
kfree(wm8523);
|
|
wm8523_codec = NULL;
|
|
}
|
|
|
|
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
|
|
static __devinit int wm8523_i2c_probe(struct i2c_client *i2c,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct wm8523_priv *wm8523;
|
|
struct snd_soc_codec *codec;
|
|
|
|
wm8523 = kzalloc(sizeof(struct wm8523_priv), GFP_KERNEL);
|
|
if (wm8523 == NULL)
|
|
return -ENOMEM;
|
|
|
|
codec = &wm8523->codec;
|
|
codec->hw_write = (hw_write_t)i2c_master_send;
|
|
|
|
i2c_set_clientdata(i2c, wm8523);
|
|
codec->control_data = i2c;
|
|
|
|
codec->dev = &i2c->dev;
|
|
|
|
return wm8523_register(wm8523, SND_SOC_I2C);
|
|
}
|
|
|
|
static __devexit int wm8523_i2c_remove(struct i2c_client *client)
|
|
{
|
|
struct wm8523_priv *wm8523 = i2c_get_clientdata(client);
|
|
wm8523_unregister(wm8523);
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int wm8523_i2c_suspend(struct i2c_client *i2c, pm_message_t msg)
|
|
{
|
|
return snd_soc_suspend_device(&i2c->dev);
|
|
}
|
|
|
|
static int wm8523_i2c_resume(struct i2c_client *i2c)
|
|
{
|
|
return snd_soc_resume_device(&i2c->dev);
|
|
}
|
|
#else
|
|
#define wm8523_i2c_suspend NULL
|
|
#define wm8523_i2c_resume NULL
|
|
#endif
|
|
|
|
static const struct i2c_device_id wm8523_i2c_id[] = {
|
|
{ "wm8523", 0 },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, wm8523_i2c_id);
|
|
|
|
static struct i2c_driver wm8523_i2c_driver = {
|
|
.driver = {
|
|
.name = "WM8523",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
.probe = wm8523_i2c_probe,
|
|
.remove = __devexit_p(wm8523_i2c_remove),
|
|
.suspend = wm8523_i2c_suspend,
|
|
.resume = wm8523_i2c_resume,
|
|
.id_table = wm8523_i2c_id,
|
|
};
|
|
#endif
|
|
|
|
static int __init wm8523_modinit(void)
|
|
{
|
|
int ret;
|
|
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
|
|
ret = i2c_add_driver(&wm8523_i2c_driver);
|
|
if (ret != 0) {
|
|
printk(KERN_ERR "Failed to register WM8523 I2C driver: %d\n",
|
|
ret);
|
|
}
|
|
#endif
|
|
return 0;
|
|
}
|
|
module_init(wm8523_modinit);
|
|
|
|
static void __exit wm8523_exit(void)
|
|
{
|
|
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
|
|
i2c_del_driver(&wm8523_i2c_driver);
|
|
#endif
|
|
}
|
|
module_exit(wm8523_exit);
|
|
|
|
MODULE_DESCRIPTION("ASoC WM8523 driver");
|
|
MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
|
|
MODULE_LICENSE("GPL");
|