mirror of
https://github.com/edk2-porting/linux-next.git
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29e189c29d
The core will ensure that the device is in either STANDBY or OFF bias before suspending, restoring the bias in the driver is unneeded. Some drivers doing slightly more roundabout things have been left alone for now. Tested-by: Peter Ujfalusi <peter.ujfalusi@nokia.com> Acked-by: Liam Girdwood <lrg@slimlogic.co.uk> Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
505 lines
11 KiB
C
505 lines
11 KiB
C
/*
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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 <broonie@opensource.wolfsonmicro.com>
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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/spi/spi.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 "wm8728.h"
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struct snd_soc_codec_device soc_codec_dev_wm8728;
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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 u16 wm8728_reg_defaults[] = {
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0x1ff,
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0x1ff,
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0x001,
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0x100,
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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 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_add_widgets(struct snd_soc_codec *codec)
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{
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snd_soc_dapm_new_controls(codec, wm8728_dapm_widgets,
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ARRAY_SIZE(wm8728_dapm_widgets));
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snd_soc_dapm_add_routes(codec, intercon, ARRAY_SIZE(intercon));
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return 0;
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}
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static int wm8728_mute(struct snd_soc_dai *dai, int mute)
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{
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struct snd_soc_codec *codec = dai->codec;
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u16 mute_reg = snd_soc_read(codec, WM8728_DACCTL);
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if (mute)
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snd_soc_write(codec, WM8728_DACCTL, mute_reg | 1);
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else
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snd_soc_write(codec, 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_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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u16 dac = snd_soc_read(codec, WM8728_DACCTL);
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dac &= ~0x18;
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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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dac |= 0x10;
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break;
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case SNDRV_PCM_FORMAT_S24_LE:
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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_write(codec, 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_codec *codec = codec_dai->codec;
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u16 iface = snd_soc_read(codec, 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_write(codec, 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_codec *codec,
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enum snd_soc_bias_level level)
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{
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u16 reg;
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int i;
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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 (codec->bias_level == SND_SOC_BIAS_OFF) {
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/* Power everything up... */
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reg = snd_soc_read(codec, WM8728_DACCTL);
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snd_soc_write(codec, WM8728_DACCTL, reg & ~0x4);
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/* ..then sync in the register cache. */
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for (i = 0; i < ARRAY_SIZE(wm8728_reg_defaults); i++)
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snd_soc_write(codec, i,
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snd_soc_read(codec, i));
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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_read(codec, WM8728_DACCTL);
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snd_soc_write(codec, WM8728_DACCTL, reg | 0x4);
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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 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 struct snd_soc_dai_ops wm8728_dai_ops = {
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.hw_params = wm8728_hw_params,
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.digital_mute = wm8728_mute,
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.set_fmt = wm8728_set_dai_fmt,
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};
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struct snd_soc_dai wm8728_dai = {
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.name = "WM8728",
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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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EXPORT_SYMBOL_GPL(wm8728_dai);
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static int wm8728_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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wm8728_set_bias_level(codec, SND_SOC_BIAS_OFF);
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return 0;
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}
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static int wm8728_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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wm8728_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
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return 0;
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}
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/*
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* initialise the WM8728 driver
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* register the mixer and dsp interfaces with the kernel
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*/
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static int wm8728_init(struct snd_soc_device *socdev,
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enum snd_soc_control_type control)
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{
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struct snd_soc_codec *codec = socdev->card->codec;
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int ret = 0;
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codec->name = "WM8728";
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codec->owner = THIS_MODULE;
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codec->set_bias_level = wm8728_set_bias_level;
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codec->dai = &wm8728_dai;
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codec->num_dai = 1;
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codec->bias_level = SND_SOC_BIAS_OFF;
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codec->reg_cache_size = ARRAY_SIZE(wm8728_reg_defaults);
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codec->reg_cache = kmemdup(wm8728_reg_defaults,
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sizeof(wm8728_reg_defaults),
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GFP_KERNEL);
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if (codec->reg_cache == NULL)
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return -ENOMEM;
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ret = snd_soc_codec_set_cache_io(codec, 7, 9, control);
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if (ret < 0) {
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printk(KERN_ERR "wm8728: failed to configure cache I/O: %d\n",
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ret);
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goto err;
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}
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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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printk(KERN_ERR "wm8728: failed to create pcms\n");
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goto err;
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}
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/* power on device */
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wm8728_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
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snd_soc_add_controls(codec, wm8728_snd_controls,
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ARRAY_SIZE(wm8728_snd_controls));
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wm8728_add_widgets(codec);
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return ret;
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err:
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kfree(codec->reg_cache);
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return ret;
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}
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static struct snd_soc_device *wm8728_socdev;
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#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
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/*
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* WM8728 2 wire address is determined by GPIO5
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* state during powerup.
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* low = 0x1a
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* high = 0x1b
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*/
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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 snd_soc_device *socdev = wm8728_socdev;
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struct snd_soc_codec *codec = socdev->card->codec;
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int ret;
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i2c_set_clientdata(i2c, codec);
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codec->control_data = i2c;
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ret = wm8728_init(socdev, SND_SOC_I2C);
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if (ret < 0)
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pr_err("failed to initialise WM8728\n");
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return ret;
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}
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static int wm8728_i2c_remove(struct i2c_client *client)
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{
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struct snd_soc_codec *codec = i2c_get_clientdata(client);
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kfree(codec->reg_cache);
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return 0;
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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 I2C Codec",
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.owner = THIS_MODULE,
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},
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.probe = wm8728_i2c_probe,
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.remove = wm8728_i2c_remove,
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.id_table = wm8728_i2c_id,
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};
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static int wm8728_add_i2c_device(struct platform_device *pdev,
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const struct wm8728_setup_data *setup)
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{
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struct i2c_board_info info;
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struct i2c_adapter *adapter;
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struct i2c_client *client;
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int ret;
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ret = i2c_add_driver(&wm8728_i2c_driver);
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if (ret != 0) {
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dev_err(&pdev->dev, "can't add i2c driver\n");
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return ret;
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}
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memset(&info, 0, sizeof(struct i2c_board_info));
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info.addr = setup->i2c_address;
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strlcpy(info.type, "wm8728", I2C_NAME_SIZE);
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adapter = i2c_get_adapter(setup->i2c_bus);
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if (!adapter) {
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dev_err(&pdev->dev, "can't get i2c adapter %d\n",
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setup->i2c_bus);
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goto err_driver;
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}
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client = i2c_new_device(adapter, &info);
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i2c_put_adapter(adapter);
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if (!client) {
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dev_err(&pdev->dev, "can't add i2c device at 0x%x\n",
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(unsigned int)info.addr);
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goto err_driver;
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}
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return 0;
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err_driver:
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i2c_del_driver(&wm8728_i2c_driver);
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return -ENODEV;
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}
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#endif
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#if defined(CONFIG_SPI_MASTER)
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static int __devinit wm8728_spi_probe(struct spi_device *spi)
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{
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struct snd_soc_device *socdev = wm8728_socdev;
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struct snd_soc_codec *codec = socdev->card->codec;
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int ret;
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codec->control_data = spi;
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ret = wm8728_init(socdev, SND_SOC_SPI);
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if (ret < 0)
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dev_err(&spi->dev, "failed to initialise WM8728\n");
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return ret;
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}
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static int __devexit wm8728_spi_remove(struct spi_device *spi)
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{
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return 0;
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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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.bus = &spi_bus_type,
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.owner = THIS_MODULE,
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},
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.probe = wm8728_spi_probe,
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.remove = __devexit_p(wm8728_spi_remove),
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};
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#endif /* CONFIG_SPI_MASTER */
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static int wm8728_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 wm8728_setup_data *setup;
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struct snd_soc_codec *codec;
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int ret = 0;
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setup = socdev->codec_data;
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codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
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if (codec == NULL)
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return -ENOMEM;
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socdev->card->codec = codec;
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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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wm8728_socdev = socdev;
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ret = -ENODEV;
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#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
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if (setup->i2c_address) {
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ret = wm8728_add_i2c_device(pdev, setup);
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}
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#endif
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#if defined(CONFIG_SPI_MASTER)
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if (setup->spi) {
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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 "can't add spi driver");
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}
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#endif
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if (ret != 0)
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kfree(codec);
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return ret;
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}
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/* power down chip */
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static int wm8728_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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struct snd_soc_codec *codec = socdev->card->codec;
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if (codec->control_data)
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wm8728_set_bias_level(codec, SND_SOC_BIAS_OFF);
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snd_soc_free_pcms(socdev);
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snd_soc_dapm_free(socdev);
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#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
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i2c_unregister_device(codec->control_data);
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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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kfree(codec);
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return 0;
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}
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struct snd_soc_codec_device soc_codec_dev_wm8728 = {
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.probe = wm8728_probe,
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.remove = wm8728_remove,
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.suspend = wm8728_suspend,
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.resume = wm8728_resume,
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};
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EXPORT_SYMBOL_GPL(soc_codec_dev_wm8728);
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static int __init wm8728_modinit(void)
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{
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return snd_soc_register_dai(&wm8728_dai);
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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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snd_soc_unregister_dai(&wm8728_dai);
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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 <broonie@opensource.wolfsonmicro.com>");
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MODULE_LICENSE("GPL");
|