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ASoC: Add WM8728 codec driver
The WM8728 is a high performance stereo DAC designed for applications such as DVD, home theatre and digital TV. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
This commit is contained in:
Mark Brown
parent
2bef901071
commit
71cfc9028d
@ -13,6 +13,7 @@ config SND_SOC_ALL_CODECS
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select SND_SOC_UDA1380 if I2C
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select SND_SOC_WM8510 if (I2C || SPI_MASTER)
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select SND_SOC_WM8580 if I2C
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select SND_SOC_WM8728 if (I2C || SPI_MASTER)
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select SND_SOC_WM8731 if (I2C || SPI_MASTER)
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select SND_SOC_WM8750 if (I2C || SPI_MASTER)
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select SND_SOC_WM8753 if (I2C || SPI_MASTER)
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@ -93,6 +94,9 @@ config SND_SOC_WM8510
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config SND_SOC_WM8580
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tristate
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config SND_SOC_WM8728
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tristate
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config SND_SOC_WM8731
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tristate
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@ -11,6 +11,7 @@ snd-soc-twl4030-objs := twl4030.o
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snd-soc-uda1380-objs := uda1380.o
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snd-soc-wm8510-objs := wm8510.o
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snd-soc-wm8580-objs := wm8580.o
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snd-soc-wm8728-objs := wm8728.o
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snd-soc-wm8731-objs := wm8731.o
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snd-soc-wm8750-objs := wm8750.o
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snd-soc-wm8753-objs := wm8753.o
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@ -34,6 +35,7 @@ obj-$(CONFIG_SND_SOC_TWL4030) += snd-soc-twl4030.o
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obj-$(CONFIG_SND_SOC_UDA1380) += snd-soc-uda1380.o
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obj-$(CONFIG_SND_SOC_WM8510) += snd-soc-wm8510.o
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obj-$(CONFIG_SND_SOC_WM8580) += snd-soc-wm8580.o
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obj-$(CONFIG_SND_SOC_WM8728) += snd-soc-wm8728.o
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obj-$(CONFIG_SND_SOC_WM8731) += snd-soc-wm8731.o
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obj-$(CONFIG_SND_SOC_WM8750) += snd-soc-wm8750.o
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obj-$(CONFIG_SND_SOC_WM8753) += snd-soc-wm8753.o
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574
sound/soc/codecs/wm8728.c
Normal file
574
sound/soc/codecs/wm8728.c
Normal file
@ -0,0 +1,574 @@
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/*
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* wm8728.c -- WM8728 ALSA SoC Audio driver
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*
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* Copyright 2008 Wolfson Microelectronics plc
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*
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* Author: Mark Brown <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 inline unsigned int wm8728_read_reg_cache(struct snd_soc_codec *codec,
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unsigned int reg)
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{
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u16 *cache = codec->reg_cache;
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BUG_ON(reg > ARRAY_SIZE(wm8728_reg_defaults));
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return cache[reg];
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}
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static inline void wm8728_write_reg_cache(struct snd_soc_codec *codec,
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u16 reg, unsigned int value)
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{
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u16 *cache = codec->reg_cache;
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BUG_ON(reg > ARRAY_SIZE(wm8728_reg_defaults));
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cache[reg] = value;
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}
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/*
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* write to the WM8728 register space
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*/
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static int wm8728_write(struct snd_soc_codec *codec, unsigned int reg,
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unsigned int value)
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{
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u8 data[2];
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/* data is
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* D15..D9 WM8728 register offset
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* D8...D0 register data
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*/
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data[0] = (reg << 1) | ((value >> 8) & 0x0001);
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data[1] = value & 0x00ff;
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wm8728_write_reg_cache(codec, reg, value);
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if (codec->hw_write(codec->control_data, data, 2) == 2)
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return 0;
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else
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return -EIO;
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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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static int wm8728_add_controls(struct snd_soc_codec *codec)
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{
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int err, i;
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for (i = 0; i < ARRAY_SIZE(wm8728_snd_controls); i++) {
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err = snd_ctl_add(codec->card,
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snd_soc_cnew(&wm8728_snd_controls[i],
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codec, NULL));
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if (err < 0)
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return err;
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}
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return 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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snd_soc_dapm_new_widgets(codec);
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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 = wm8728_read_reg_cache(codec, WM8728_DACCTL);
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if (mute)
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wm8728_write(codec, WM8728_DACCTL, mute_reg | 1);
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else
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wm8728_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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{
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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->codec;
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u16 dac = wm8728_read_reg_cache(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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wm8728_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 = wm8728_read_reg_cache(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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wm8728_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 = wm8728_read_reg_cache(codec, WM8728_DACCTL);
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wm8728_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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wm8728_write(codec, i,
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wm8728_read_reg_cache(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 = wm8728_read_reg_cache(codec, WM8728_DACCTL);
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wm8728_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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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 = {
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.hw_params = wm8728_hw_params,
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},
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.dai_ops = {
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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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};
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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->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->codec;
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wm8728_set_bias_level(codec, codec->suspend_bias_level);
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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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{
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struct snd_soc_codec *codec = socdev->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->read = wm8728_read_reg_cache;
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codec->write = wm8728_write;
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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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/* 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 pcm_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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wm8728_add_controls(codec);
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wm8728_add_widgets(codec);
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ret = snd_soc_register_card(socdev);
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if (ret < 0) {
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printk(KERN_ERR "wm8728: failed to register card\n");
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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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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->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);
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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) {
|
||||
dev_err(&pdev->dev, "can't get i2c adapter %d\n",
|
||||
setup->i2c_bus);
|
||||
goto err_driver;
|
||||
}
|
||||
|
||||
client = i2c_new_device(adapter, &info);
|
||||
i2c_put_adapter(adapter);
|
||||
if (!client) {
|
||||
dev_err(&pdev->dev, "can't add i2c device at 0x%x\n",
|
||||
(unsigned int)info.addr);
|
||||
goto err_driver;
|
||||
}
|
||||
|
||||
return 0;
|
||||
|
||||
err_driver:
|
||||
i2c_del_driver(&wm8728_i2c_driver);
|
||||
return -ENODEV;
|
||||
}
|
||||
#endif
|
||||
|
||||
#if defined(CONFIG_SPI_MASTER)
|
||||
static int __devinit wm8728_spi_probe(struct spi_device *spi)
|
||||
{
|
||||
struct snd_soc_device *socdev = wm8728_socdev;
|
||||
struct snd_soc_codec *codec = socdev->codec;
|
||||
int ret;
|
||||
|
||||
codec->control_data = spi;
|
||||
|
||||
ret = wm8728_init(socdev);
|
||||
if (ret < 0)
|
||||
dev_err(&spi->dev, "failed to initialise WM8728\n");
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
static int __devexit wm8728_spi_remove(struct spi_device *spi)
|
||||
{
|
||||
return 0;
|
||||
}
|
||||
|
||||
static struct spi_driver wm8728_spi_driver = {
|
||||
.driver = {
|
||||
.name = "wm8728",
|
||||
.bus = &spi_bus_type,
|
||||
.owner = THIS_MODULE,
|
||||
},
|
||||
.probe = wm8728_spi_probe,
|
||||
.remove = __devexit_p(wm8728_spi_remove),
|
||||
};
|
||||
|
||||
static int wm8728_spi_write(struct spi_device *spi, const char *data, int len)
|
||||
{
|
||||
struct spi_transfer t;
|
||||
struct spi_message m;
|
||||
u8 msg[2];
|
||||
|
||||
if (len <= 0)
|
||||
return 0;
|
||||
|
||||
msg[0] = data[0];
|
||||
msg[1] = data[1];
|
||||
|
||||
spi_message_init(&m);
|
||||
memset(&t, 0, (sizeof t));
|
||||
|
||||
t.tx_buf = &msg[0];
|
||||
t.len = len;
|
||||
|
||||
spi_message_add_tail(&t, &m);
|
||||
spi_sync(spi, &m);
|
||||
|
||||
return len;
|
||||
}
|
||||
#endif /* CONFIG_SPI_MASTER */
|
||||
|
||||
static int wm8728_probe(struct platform_device *pdev)
|
||||
{
|
||||
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
|
||||
struct wm8728_setup_data *setup;
|
||||
struct snd_soc_codec *codec;
|
||||
int ret = 0;
|
||||
|
||||
setup = socdev->codec_data;
|
||||
codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
|
||||
if (codec == NULL)
|
||||
return -ENOMEM;
|
||||
|
||||
socdev->codec = codec;
|
||||
mutex_init(&codec->mutex);
|
||||
INIT_LIST_HEAD(&codec->dapm_widgets);
|
||||
INIT_LIST_HEAD(&codec->dapm_paths);
|
||||
|
||||
wm8728_socdev = socdev;
|
||||
ret = -ENODEV;
|
||||
|
||||
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
|
||||
if (setup->i2c_address) {
|
||||
codec->hw_write = (hw_write_t)i2c_master_send;
|
||||
ret = wm8728_add_i2c_device(pdev, setup);
|
||||
}
|
||||
#endif
|
||||
#if defined(CONFIG_SPI_MASTER)
|
||||
if (setup->spi) {
|
||||
codec->hw_write = (hw_write_t)wm8728_spi_write;
|
||||
ret = spi_register_driver(&wm8728_spi_driver);
|
||||
if (ret != 0)
|
||||
printk(KERN_ERR "can't add spi driver");
|
||||
}
|
||||
#endif
|
||||
|
||||
if (ret != 0)
|
||||
kfree(codec);
|
||||
|
||||
return ret;
|
||||
}
|
||||
|
||||
/* power down chip */
|
||||
static int wm8728_remove(struct platform_device *pdev)
|
||||
{
|
||||
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
|
||||
struct snd_soc_codec *codec = socdev->codec;
|
||||
|
||||
if (codec->control_data)
|
||||
wm8728_set_bias_level(codec, SND_SOC_BIAS_OFF);
|
||||
|
||||
snd_soc_free_pcms(socdev);
|
||||
snd_soc_dapm_free(socdev);
|
||||
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
|
||||
i2c_unregister_device(codec->control_data);
|
||||
i2c_del_driver(&wm8728_i2c_driver);
|
||||
#endif
|
||||
#if defined(CONFIG_SPI_MASTER)
|
||||
spi_unregister_driver(&wm8728_spi_driver);
|
||||
#endif
|
||||
kfree(codec);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
struct snd_soc_codec_device soc_codec_dev_wm8728 = {
|
||||
.probe = wm8728_probe,
|
||||
.remove = wm8728_remove,
|
||||
.suspend = wm8728_suspend,
|
||||
.resume = wm8728_resume,
|
||||
};
|
||||
EXPORT_SYMBOL_GPL(soc_codec_dev_wm8728);
|
||||
|
||||
MODULE_DESCRIPTION("ASoC WM8728 driver");
|
||||
MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
|
||||
MODULE_LICENSE("GPL");
|
||||
30
sound/soc/codecs/wm8728.h
Normal file
30
sound/soc/codecs/wm8728.h
Normal file
@ -0,0 +1,30 @@
|
||||
/*
|
||||
* wm8728.h -- WM8728 ASoC codec driver
|
||||
*
|
||||
* Copyright 2008 Wolfson Microelectronics plc
|
||||
*
|
||||
* Author: Mark Brown <broonie@opensource.wolfsonmicro.com>
|
||||
*
|
||||
* This program is free software; you can redistribute it and/or modify
|
||||
* it under the terms of the GNU General Public License version 2 as
|
||||
* published by the Free Software Foundation.
|
||||
*/
|
||||
|
||||
#ifndef _WM8728_H
|
||||
#define _WM8728_H
|
||||
|
||||
#define WM8728_DACLVOL 0x00
|
||||
#define WM8728_DACRVOL 0x01
|
||||
#define WM8728_DACCTL 0x02
|
||||
#define WM8728_IFCTL 0x03
|
||||
|
||||
struct wm8728_setup_data {
|
||||
int spi;
|
||||
int i2c_bus;
|
||||
unsigned short i2c_address;
|
||||
};
|
||||
|
||||
extern struct snd_soc_dai wm8728_dai;
|
||||
extern struct snd_soc_codec_device soc_codec_dev_wm8728;
|
||||
|
||||
#endif
|
||||
Loading…
Reference in New Issue
Block a user