c9b3a40ff2
The module init entries should be __init instead of __devinit. Signed-off-by: Takashi Iwai <tiwai@suse.de>
811 lines
19 KiB
C
811 lines
19 KiB
C
/*
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* wm8731.c -- WM8731 ALSA SoC Audio driver
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*
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* Copyright 2005 Openedhand Ltd.
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*
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* Author: Richard Purdie <richard@openedhand.com>
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*
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* Based on wm8753.c by Liam Girdwood
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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 "wm8731.h"
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#define WM8731_VERSION "0.13"
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struct snd_soc_codec_device soc_codec_dev_wm8731;
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/* codec private data */
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struct wm8731_priv {
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unsigned int sysclk;
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};
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/*
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* wm8731 register cache
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* We can't read the WM8731 register space when we are
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* using 2 wire for device control, so we cache them instead.
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* There is no point in caching the reset register
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*/
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static const u16 wm8731_reg[WM8731_CACHEREGNUM] = {
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0x0097, 0x0097, 0x0079, 0x0079,
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0x000a, 0x0008, 0x009f, 0x000a,
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0x0000, 0x0000
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};
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/*
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* read wm8731 register cache
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*/
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static inline unsigned int wm8731_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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if (reg == WM8731_RESET)
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return 0;
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if (reg >= WM8731_CACHEREGNUM)
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return -1;
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return cache[reg];
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}
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/*
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* write wm8731 register cache
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*/
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static inline void wm8731_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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if (reg >= WM8731_CACHEREGNUM)
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return;
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cache[reg] = value;
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}
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/*
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* write to the WM8731 register space
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*/
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static int wm8731_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 WM8731 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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wm8731_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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#define wm8731_reset(c) wm8731_write(c, WM8731_RESET, 0)
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static const char *wm8731_input_select[] = {"Line In", "Mic"};
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static const char *wm8731_deemph[] = {"None", "32Khz", "44.1Khz", "48Khz"};
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static const struct soc_enum wm8731_enum[] = {
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SOC_ENUM_SINGLE(WM8731_APANA, 2, 2, wm8731_input_select),
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SOC_ENUM_SINGLE(WM8731_APDIGI, 1, 4, wm8731_deemph),
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};
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static const struct snd_kcontrol_new wm8731_snd_controls[] = {
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SOC_DOUBLE_R("Master Playback Volume", WM8731_LOUT1V, WM8731_ROUT1V,
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0, 127, 0),
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SOC_DOUBLE_R("Master Playback ZC Switch", WM8731_LOUT1V, WM8731_ROUT1V,
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7, 1, 0),
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SOC_DOUBLE_R("Capture Volume", WM8731_LINVOL, WM8731_RINVOL, 0, 31, 0),
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SOC_DOUBLE_R("Line Capture Switch", WM8731_LINVOL, WM8731_RINVOL, 7, 1, 1),
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SOC_SINGLE("Mic Boost (+20dB)", WM8731_APANA, 0, 1, 0),
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SOC_SINGLE("Capture Mic Switch", WM8731_APANA, 1, 1, 1),
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SOC_SINGLE("Sidetone Playback Volume", WM8731_APANA, 6, 3, 1),
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SOC_SINGLE("ADC High Pass Filter Switch", WM8731_APDIGI, 0, 1, 1),
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SOC_SINGLE("Store DC Offset Switch", WM8731_APDIGI, 4, 1, 0),
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SOC_ENUM("Playback De-emphasis", wm8731_enum[1]),
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};
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/* add non dapm controls */
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static int wm8731_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(wm8731_snd_controls); i++) {
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err = snd_ctl_add(codec->card,
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snd_soc_cnew(&wm8731_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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/* Output Mixer */
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static const struct snd_kcontrol_new wm8731_output_mixer_controls[] = {
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SOC_DAPM_SINGLE("Line Bypass Switch", WM8731_APANA, 3, 1, 0),
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SOC_DAPM_SINGLE("Mic Sidetone Switch", WM8731_APANA, 5, 1, 0),
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SOC_DAPM_SINGLE("HiFi Playback Switch", WM8731_APANA, 4, 1, 0),
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};
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/* Input mux */
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static const struct snd_kcontrol_new wm8731_input_mux_controls =
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SOC_DAPM_ENUM("Input Select", wm8731_enum[0]);
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static const struct snd_soc_dapm_widget wm8731_dapm_widgets[] = {
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SND_SOC_DAPM_MIXER("Output Mixer", WM8731_PWR, 4, 1,
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&wm8731_output_mixer_controls[0],
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ARRAY_SIZE(wm8731_output_mixer_controls)),
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SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8731_PWR, 3, 1),
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SND_SOC_DAPM_OUTPUT("LOUT"),
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SND_SOC_DAPM_OUTPUT("LHPOUT"),
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SND_SOC_DAPM_OUTPUT("ROUT"),
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SND_SOC_DAPM_OUTPUT("RHPOUT"),
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SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8731_PWR, 2, 1),
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SND_SOC_DAPM_MUX("Input Mux", SND_SOC_NOPM, 0, 0, &wm8731_input_mux_controls),
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SND_SOC_DAPM_PGA("Line Input", WM8731_PWR, 0, 1, NULL, 0),
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SND_SOC_DAPM_MICBIAS("Mic Bias", WM8731_PWR, 1, 1),
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SND_SOC_DAPM_INPUT("MICIN"),
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SND_SOC_DAPM_INPUT("RLINEIN"),
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SND_SOC_DAPM_INPUT("LLINEIN"),
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};
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static const struct snd_soc_dapm_route intercon[] = {
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/* output mixer */
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{"Output Mixer", "Line Bypass Switch", "Line Input"},
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{"Output Mixer", "HiFi Playback Switch", "DAC"},
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{"Output Mixer", "Mic Sidetone Switch", "Mic Bias"},
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/* outputs */
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{"RHPOUT", NULL, "Output Mixer"},
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{"ROUT", NULL, "Output Mixer"},
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{"LHPOUT", NULL, "Output Mixer"},
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{"LOUT", NULL, "Output Mixer"},
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/* input mux */
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{"Input Mux", "Line In", "Line Input"},
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{"Input Mux", "Mic", "Mic Bias"},
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{"ADC", NULL, "Input Mux"},
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/* inputs */
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{"Line Input", NULL, "LLINEIN"},
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{"Line Input", NULL, "RLINEIN"},
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{"Mic Bias", NULL, "MICIN"},
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};
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static int wm8731_add_widgets(struct snd_soc_codec *codec)
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{
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snd_soc_dapm_new_controls(codec, wm8731_dapm_widgets,
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ARRAY_SIZE(wm8731_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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struct _coeff_div {
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u32 mclk;
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u32 rate;
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u16 fs;
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u8 sr:4;
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u8 bosr:1;
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u8 usb:1;
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};
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/* codec mclk clock divider coefficients */
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static const struct _coeff_div coeff_div[] = {
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/* 48k */
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{12288000, 48000, 256, 0x0, 0x0, 0x0},
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{18432000, 48000, 384, 0x0, 0x1, 0x0},
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{12000000, 48000, 250, 0x0, 0x0, 0x1},
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/* 32k */
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{12288000, 32000, 384, 0x6, 0x0, 0x0},
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{18432000, 32000, 576, 0x6, 0x1, 0x0},
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{12000000, 32000, 375, 0x6, 0x0, 0x1},
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/* 8k */
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{12288000, 8000, 1536, 0x3, 0x0, 0x0},
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{18432000, 8000, 2304, 0x3, 0x1, 0x0},
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{11289600, 8000, 1408, 0xb, 0x0, 0x0},
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{16934400, 8000, 2112, 0xb, 0x1, 0x0},
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{12000000, 8000, 1500, 0x3, 0x0, 0x1},
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/* 96k */
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{12288000, 96000, 128, 0x7, 0x0, 0x0},
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{18432000, 96000, 192, 0x7, 0x1, 0x0},
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{12000000, 96000, 125, 0x7, 0x0, 0x1},
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/* 44.1k */
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{11289600, 44100, 256, 0x8, 0x0, 0x0},
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{16934400, 44100, 384, 0x8, 0x1, 0x0},
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{12000000, 44100, 272, 0x8, 0x1, 0x1},
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/* 88.2k */
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{11289600, 88200, 128, 0xf, 0x0, 0x0},
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{16934400, 88200, 192, 0xf, 0x1, 0x0},
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{12000000, 88200, 136, 0xf, 0x1, 0x1},
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};
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static inline int get_coeff(int mclk, int rate)
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{
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int i;
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for (i = 0; i < ARRAY_SIZE(coeff_div); i++) {
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if (coeff_div[i].rate == rate && coeff_div[i].mclk == mclk)
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return i;
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}
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return 0;
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}
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static int wm8731_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->codec;
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struct wm8731_priv *wm8731 = codec->private_data;
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u16 iface = wm8731_read_reg_cache(codec, WM8731_IFACE) & 0xfff3;
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int i = get_coeff(wm8731->sysclk, params_rate(params));
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u16 srate = (coeff_div[i].sr << 2) |
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(coeff_div[i].bosr << 1) | coeff_div[i].usb;
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wm8731_write(codec, WM8731_SRATE, srate);
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/* bit size */
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switch (params_format(params)) {
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case SNDRV_PCM_FORMAT_S16_LE:
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break;
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case SNDRV_PCM_FORMAT_S20_3LE:
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iface |= 0x0004;
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break;
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case SNDRV_PCM_FORMAT_S24_LE:
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iface |= 0x0008;
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break;
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}
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wm8731_write(codec, WM8731_IFACE, iface);
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return 0;
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}
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static int wm8731_pcm_prepare(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_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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/* set active */
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wm8731_write(codec, WM8731_ACTIVE, 0x0001);
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return 0;
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}
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static void wm8731_shutdown(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_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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/* deactivate */
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if (!codec->active) {
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udelay(50);
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wm8731_write(codec, WM8731_ACTIVE, 0x0);
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}
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}
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static int wm8731_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 = wm8731_read_reg_cache(codec, WM8731_APDIGI) & 0xfff7;
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if (mute)
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wm8731_write(codec, WM8731_APDIGI, mute_reg | 0x8);
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else
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wm8731_write(codec, WM8731_APDIGI, mute_reg);
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return 0;
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}
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static int wm8731_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 wm8731_priv *wm8731 = codec->private_data;
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switch (freq) {
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case 11289600:
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case 12000000:
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case 12288000:
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case 16934400:
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case 18432000:
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wm8731->sysclk = freq;
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return 0;
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}
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return -EINVAL;
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}
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static int wm8731_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 = 0;
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/* set master/slave audio interface */
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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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iface |= 0x0040;
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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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/* interface format */
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switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
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case SND_SOC_DAIFMT_I2S:
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iface |= 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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iface |= 0x0001;
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break;
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case SND_SOC_DAIFMT_DSP_A:
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iface |= 0x0003;
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break;
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case SND_SOC_DAIFMT_DSP_B:
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iface |= 0x0013;
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break;
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default:
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return -EINVAL;
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}
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/* clock inversion */
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switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
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case SND_SOC_DAIFMT_NB_NF:
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break;
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case SND_SOC_DAIFMT_IB_IF:
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iface |= 0x0090;
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break;
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case SND_SOC_DAIFMT_IB_NF:
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iface |= 0x0080;
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break;
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case SND_SOC_DAIFMT_NB_IF:
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iface |= 0x0010;
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break;
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default:
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return -EINVAL;
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}
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/* set iface */
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wm8731_write(codec, WM8731_IFACE, iface);
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return 0;
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}
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static int wm8731_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 = wm8731_read_reg_cache(codec, WM8731_PWR) & 0xff7f;
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switch (level) {
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case SND_SOC_BIAS_ON:
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/* vref/mid, osc on, dac unmute */
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wm8731_write(codec, WM8731_PWR, reg);
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break;
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case SND_SOC_BIAS_PREPARE:
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break;
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case SND_SOC_BIAS_STANDBY:
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/* everything off except vref/vmid, */
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wm8731_write(codec, WM8731_PWR, reg | 0x0040);
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break;
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case SND_SOC_BIAS_OFF:
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/* everything off, dac mute, inactive */
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wm8731_write(codec, WM8731_ACTIVE, 0x0);
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wm8731_write(codec, WM8731_PWR, 0xffff);
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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 WM8731_RATES (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_11025 |\
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SNDRV_PCM_RATE_16000 | SNDRV_PCM_RATE_22050 |\
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SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 |\
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SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_88200 |\
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SNDRV_PCM_RATE_96000)
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#define WM8731_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 wm8731_dai = {
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.name = "WM8731",
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.playback = {
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.stream_name = "Playback",
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.channels_min = 1,
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.channels_max = 2,
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.rates = WM8731_RATES,
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.formats = WM8731_FORMATS,},
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.capture = {
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.stream_name = "Capture",
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.channels_min = 1,
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.channels_max = 2,
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.rates = WM8731_RATES,
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.formats = WM8731_FORMATS,},
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.ops = {
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.prepare = wm8731_pcm_prepare,
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.hw_params = wm8731_hw_params,
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.shutdown = wm8731_shutdown,
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.digital_mute = wm8731_mute,
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.set_sysclk = wm8731_set_dai_sysclk,
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.set_fmt = wm8731_set_dai_fmt,
|
|
}
|
|
};
|
|
EXPORT_SYMBOL_GPL(wm8731_dai);
|
|
|
|
static int wm8731_suspend(struct platform_device *pdev, pm_message_t state)
|
|
{
|
|
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
|
|
struct snd_soc_codec *codec = socdev->codec;
|
|
|
|
wm8731_write(codec, WM8731_ACTIVE, 0x0);
|
|
wm8731_set_bias_level(codec, SND_SOC_BIAS_OFF);
|
|
return 0;
|
|
}
|
|
|
|
static int wm8731_resume(struct platform_device *pdev)
|
|
{
|
|
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
|
|
struct snd_soc_codec *codec = socdev->codec;
|
|
int i;
|
|
u8 data[2];
|
|
u16 *cache = codec->reg_cache;
|
|
|
|
/* Sync reg_cache with the hardware */
|
|
for (i = 0; i < ARRAY_SIZE(wm8731_reg); i++) {
|
|
data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
|
|
data[1] = cache[i] & 0x00ff;
|
|
codec->hw_write(codec->control_data, data, 2);
|
|
}
|
|
wm8731_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
|
|
wm8731_set_bias_level(codec, codec->suspend_bias_level);
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* initialise the WM8731 driver
|
|
* register the mixer and dsp interfaces with the kernel
|
|
*/
|
|
static int wm8731_init(struct snd_soc_device *socdev)
|
|
{
|
|
struct snd_soc_codec *codec = socdev->codec;
|
|
int reg, ret = 0;
|
|
|
|
codec->name = "WM8731";
|
|
codec->owner = THIS_MODULE;
|
|
codec->read = wm8731_read_reg_cache;
|
|
codec->write = wm8731_write;
|
|
codec->set_bias_level = wm8731_set_bias_level;
|
|
codec->dai = &wm8731_dai;
|
|
codec->num_dai = 1;
|
|
codec->reg_cache_size = ARRAY_SIZE(wm8731_reg);
|
|
codec->reg_cache = kmemdup(wm8731_reg, sizeof(wm8731_reg), GFP_KERNEL);
|
|
if (codec->reg_cache == NULL)
|
|
return -ENOMEM;
|
|
|
|
wm8731_reset(codec);
|
|
|
|
/* register pcms */
|
|
ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
|
|
if (ret < 0) {
|
|
printk(KERN_ERR "wm8731: failed to create pcms\n");
|
|
goto pcm_err;
|
|
}
|
|
|
|
/* power on device */
|
|
wm8731_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
|
|
|
|
/* set the update bits */
|
|
reg = wm8731_read_reg_cache(codec, WM8731_LOUT1V);
|
|
wm8731_write(codec, WM8731_LOUT1V, reg & ~0x0100);
|
|
reg = wm8731_read_reg_cache(codec, WM8731_ROUT1V);
|
|
wm8731_write(codec, WM8731_ROUT1V, reg & ~0x0100);
|
|
reg = wm8731_read_reg_cache(codec, WM8731_LINVOL);
|
|
wm8731_write(codec, WM8731_LINVOL, reg & ~0x0100);
|
|
reg = wm8731_read_reg_cache(codec, WM8731_RINVOL);
|
|
wm8731_write(codec, WM8731_RINVOL, reg & ~0x0100);
|
|
|
|
wm8731_add_controls(codec);
|
|
wm8731_add_widgets(codec);
|
|
ret = snd_soc_init_card(socdev);
|
|
if (ret < 0) {
|
|
printk(KERN_ERR "wm8731: failed to register card\n");
|
|
goto card_err;
|
|
}
|
|
|
|
return ret;
|
|
|
|
card_err:
|
|
snd_soc_free_pcms(socdev);
|
|
snd_soc_dapm_free(socdev);
|
|
pcm_err:
|
|
kfree(codec->reg_cache);
|
|
return ret;
|
|
}
|
|
|
|
static struct snd_soc_device *wm8731_socdev;
|
|
|
|
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
|
|
|
|
/*
|
|
* WM8731 2 wire address is determined by GPIO5
|
|
* state during powerup.
|
|
* low = 0x1a
|
|
* high = 0x1b
|
|
*/
|
|
|
|
static int wm8731_i2c_probe(struct i2c_client *i2c,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct snd_soc_device *socdev = wm8731_socdev;
|
|
struct snd_soc_codec *codec = socdev->codec;
|
|
int ret;
|
|
|
|
i2c_set_clientdata(i2c, codec);
|
|
codec->control_data = i2c;
|
|
|
|
ret = wm8731_init(socdev);
|
|
if (ret < 0)
|
|
pr_err("failed to initialise WM8731\n");
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int wm8731_i2c_remove(struct i2c_client *client)
|
|
{
|
|
struct snd_soc_codec *codec = i2c_get_clientdata(client);
|
|
kfree(codec->reg_cache);
|
|
return 0;
|
|
}
|
|
|
|
static const struct i2c_device_id wm8731_i2c_id[] = {
|
|
{ "wm8731", 0 },
|
|
{ }
|
|
};
|
|
MODULE_DEVICE_TABLE(i2c, wm8731_i2c_id);
|
|
|
|
static struct i2c_driver wm8731_i2c_driver = {
|
|
.driver = {
|
|
.name = "WM8731 I2C Codec",
|
|
.owner = THIS_MODULE,
|
|
},
|
|
.probe = wm8731_i2c_probe,
|
|
.remove = wm8731_i2c_remove,
|
|
.id_table = wm8731_i2c_id,
|
|
};
|
|
|
|
static int wm8731_add_i2c_device(struct platform_device *pdev,
|
|
const struct wm8731_setup_data *setup)
|
|
{
|
|
struct i2c_board_info info;
|
|
struct i2c_adapter *adapter;
|
|
struct i2c_client *client;
|
|
int ret;
|
|
|
|
ret = i2c_add_driver(&wm8731_i2c_driver);
|
|
if (ret != 0) {
|
|
dev_err(&pdev->dev, "can't add i2c driver\n");
|
|
return ret;
|
|
}
|
|
|
|
memset(&info, 0, sizeof(struct i2c_board_info));
|
|
info.addr = setup->i2c_address;
|
|
strlcpy(info.type, "wm8731", I2C_NAME_SIZE);
|
|
|
|
adapter = i2c_get_adapter(setup->i2c_bus);
|
|
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(&wm8731_i2c_driver);
|
|
return -ENODEV;
|
|
}
|
|
#endif
|
|
|
|
#if defined(CONFIG_SPI_MASTER)
|
|
static int __devinit wm8731_spi_probe(struct spi_device *spi)
|
|
{
|
|
struct snd_soc_device *socdev = wm8731_socdev;
|
|
struct snd_soc_codec *codec = socdev->codec;
|
|
int ret;
|
|
|
|
codec->control_data = spi;
|
|
|
|
ret = wm8731_init(socdev);
|
|
if (ret < 0)
|
|
dev_err(&spi->dev, "failed to initialise WM8731\n");
|
|
|
|
return ret;
|
|
}
|
|
|
|
static int __devexit wm8731_spi_remove(struct spi_device *spi)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
static struct spi_driver wm8731_spi_driver = {
|
|
.driver = {
|
|
.name = "wm8731",
|
|
.bus = &spi_bus_type,
|
|
.owner = THIS_MODULE,
|
|
},
|
|
.probe = wm8731_spi_probe,
|
|
.remove = __devexit_p(wm8731_spi_remove),
|
|
};
|
|
|
|
static int wm8731_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 wm8731_probe(struct platform_device *pdev)
|
|
{
|
|
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
|
|
struct wm8731_setup_data *setup;
|
|
struct snd_soc_codec *codec;
|
|
struct wm8731_priv *wm8731;
|
|
int ret = 0;
|
|
|
|
pr_info("WM8731 Audio Codec %s", WM8731_VERSION);
|
|
|
|
setup = socdev->codec_data;
|
|
codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
|
|
if (codec == NULL)
|
|
return -ENOMEM;
|
|
|
|
wm8731 = kzalloc(sizeof(struct wm8731_priv), GFP_KERNEL);
|
|
if (wm8731 == NULL) {
|
|
kfree(codec);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
codec->private_data = wm8731;
|
|
socdev->codec = codec;
|
|
mutex_init(&codec->mutex);
|
|
INIT_LIST_HEAD(&codec->dapm_widgets);
|
|
INIT_LIST_HEAD(&codec->dapm_paths);
|
|
|
|
wm8731_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 = wm8731_add_i2c_device(pdev, setup);
|
|
}
|
|
#endif
|
|
#if defined(CONFIG_SPI_MASTER)
|
|
if (setup->spi) {
|
|
codec->hw_write = (hw_write_t)wm8731_spi_write;
|
|
ret = spi_register_driver(&wm8731_spi_driver);
|
|
if (ret != 0)
|
|
printk(KERN_ERR "can't add spi driver");
|
|
}
|
|
#endif
|
|
|
|
if (ret != 0) {
|
|
kfree(codec->private_data);
|
|
kfree(codec);
|
|
}
|
|
return ret;
|
|
}
|
|
|
|
/* power down chip */
|
|
static int wm8731_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)
|
|
wm8731_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(&wm8731_i2c_driver);
|
|
#endif
|
|
#if defined(CONFIG_SPI_MASTER)
|
|
spi_unregister_driver(&wm8731_spi_driver);
|
|
#endif
|
|
kfree(codec->private_data);
|
|
kfree(codec);
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct snd_soc_codec_device soc_codec_dev_wm8731 = {
|
|
.probe = wm8731_probe,
|
|
.remove = wm8731_remove,
|
|
.suspend = wm8731_suspend,
|
|
.resume = wm8731_resume,
|
|
};
|
|
EXPORT_SYMBOL_GPL(soc_codec_dev_wm8731);
|
|
|
|
static int __init wm8731_modinit(void)
|
|
{
|
|
return snd_soc_register_dai(&wm8731_dai);
|
|
}
|
|
module_init(wm8731_modinit);
|
|
|
|
static void __exit wm8731_exit(void)
|
|
{
|
|
snd_soc_unregister_dai(&wm8731_dai);
|
|
}
|
|
module_exit(wm8731_exit);
|
|
|
|
MODULE_DESCRIPTION("ASoC WM8731 driver");
|
|
MODULE_AUTHOR("Richard Purdie");
|
|
MODULE_LICENSE("GPL");
|