17a52fd60a
A lot of CODECs share the same register data formats and therefore replicate the code to manage access to and caching of the register map. In order to reduce code duplication centralised versions of this code will be introduced with drivers able to configure the use of the common code by calling the new snd_soc_codec_set_cache_io() API call during startup. As an initial user the 7 bit address/9 bit data format used by many Wolfson devices is supported for write only CODECs and the drivers with straightforward register cache implementations are converted to use it. Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
771 lines
18 KiB
C
771 lines
18 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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static struct snd_soc_codec *wm8731_codec;
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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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struct snd_soc_codec codec;
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u16 reg_cache[WM8731_CACHEREGNUM];
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unsigned int sysclk;
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};
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#ifdef CONFIG_SPI_MASTER
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static int wm8731_spi_write(struct spi_device *spi, const char *data, int len);
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#endif
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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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#define wm8731_reset(c) snd_soc_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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/* 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->card->codec;
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struct wm8731_priv *wm8731 = codec->private_data;
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u16 iface = snd_soc_read(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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snd_soc_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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snd_soc_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->card->codec;
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/* set active */
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snd_soc_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->card->codec;
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/* deactivate */
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if (!codec->active) {
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udelay(50);
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snd_soc_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 = snd_soc_read(codec, WM8731_APDIGI) & 0xfff7;
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if (mute)
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snd_soc_write(codec, WM8731_APDIGI, mute_reg | 0x8);
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else
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snd_soc_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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snd_soc_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;
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switch (level) {
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case SND_SOC_BIAS_ON:
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break;
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case SND_SOC_BIAS_PREPARE:
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break;
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case SND_SOC_BIAS_STANDBY:
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/* Clear PWROFF, gate CLKOUT, everything else as-is */
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reg = snd_soc_read(codec, WM8731_PWR) & 0xff7f;
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snd_soc_write(codec, WM8731_PWR, reg | 0x0040);
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break;
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case SND_SOC_BIAS_OFF:
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snd_soc_write(codec, WM8731_ACTIVE, 0x0);
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snd_soc_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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static struct snd_soc_dai_ops wm8731_dai_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,
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};
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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 = &wm8731_dai_ops,
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};
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EXPORT_SYMBOL_GPL(wm8731_dai);
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#ifdef CONFIG_PM
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static int wm8731_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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snd_soc_write(codec, WM8731_ACTIVE, 0x0);
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wm8731_set_bias_level(codec, SND_SOC_BIAS_OFF);
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return 0;
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}
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static int wm8731_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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int i;
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u8 data[2];
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u16 *cache = codec->reg_cache;
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/* Sync reg_cache with the hardware */
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for (i = 0; i < ARRAY_SIZE(wm8731_reg); i++) {
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data[0] = (i << 1) | ((cache[i] >> 8) & 0x0001);
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data[1] = cache[i] & 0x00ff;
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codec->hw_write(codec->control_data, data, 2);
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}
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wm8731_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
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wm8731_set_bias_level(codec, codec->suspend_bias_level);
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return 0;
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}
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#else
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#define wm8731_suspend NULL
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#define wm8731_resume NULL
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#endif
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static int wm8731_probe(struct platform_device *pdev)
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{
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struct snd_soc_device *socdev = platform_get_drvdata(pdev);
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struct snd_soc_codec *codec;
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int ret = 0;
|
|
|
|
if (wm8731_codec == NULL) {
|
|
dev_err(&pdev->dev, "Codec device not registered\n");
|
|
return -ENODEV;
|
|
}
|
|
|
|
socdev->card->codec = wm8731_codec;
|
|
codec = wm8731_codec;
|
|
|
|
/* register pcms */
|
|
ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
|
|
if (ret < 0) {
|
|
dev_err(codec->dev, "failed to create pcms: %d\n", ret);
|
|
goto pcm_err;
|
|
}
|
|
|
|
snd_soc_add_controls(codec, wm8731_snd_controls,
|
|
ARRAY_SIZE(wm8731_snd_controls));
|
|
wm8731_add_widgets(codec);
|
|
ret = snd_soc_init_card(socdev);
|
|
if (ret < 0) {
|
|
dev_err(codec->dev, "failed to register card: %d\n", ret);
|
|
goto card_err;
|
|
}
|
|
|
|
return ret;
|
|
|
|
card_err:
|
|
snd_soc_free_pcms(socdev);
|
|
snd_soc_dapm_free(socdev);
|
|
pcm_err:
|
|
return ret;
|
|
}
|
|
|
|
/* power down chip */
|
|
static int wm8731_remove(struct platform_device *pdev)
|
|
{
|
|
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
|
|
|
|
snd_soc_free_pcms(socdev);
|
|
snd_soc_dapm_free(socdev);
|
|
|
|
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 wm8731_register(struct wm8731_priv *wm8731)
|
|
{
|
|
int ret;
|
|
struct snd_soc_codec *codec = &wm8731->codec;
|
|
|
|
if (wm8731_codec) {
|
|
dev_err(codec->dev, "Another WM8731 is registered\n");
|
|
ret = -EINVAL;
|
|
goto err;
|
|
}
|
|
|
|
mutex_init(&codec->mutex);
|
|
INIT_LIST_HEAD(&codec->dapm_widgets);
|
|
INIT_LIST_HEAD(&codec->dapm_paths);
|
|
|
|
codec->private_data = wm8731;
|
|
codec->name = "WM8731";
|
|
codec->owner = THIS_MODULE;
|
|
codec->bias_level = SND_SOC_BIAS_OFF;
|
|
codec->set_bias_level = wm8731_set_bias_level;
|
|
codec->dai = &wm8731_dai;
|
|
codec->num_dai = 1;
|
|
codec->reg_cache_size = WM8731_CACHEREGNUM;
|
|
codec->reg_cache = &wm8731->reg_cache;
|
|
|
|
memcpy(codec->reg_cache, wm8731_reg, sizeof(wm8731_reg));
|
|
|
|
ret = snd_soc_codec_set_cache_io(codec, 7, 9);
|
|
if (ret < 0) {
|
|
dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
|
|
goto err;
|
|
}
|
|
|
|
ret = wm8731_reset(codec);
|
|
if (ret < 0) {
|
|
dev_err(codec->dev, "Failed to issue reset: %d\n", ret);
|
|
goto err;
|
|
}
|
|
|
|
wm8731_dai.dev = codec->dev;
|
|
|
|
wm8731_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
|
|
|
|
/* Latch the update bits */
|
|
snd_soc_update_bits(codec, WM8731_LOUT1V, 0x100, 0);
|
|
snd_soc_update_bits(codec, WM8731_ROUT1V, 0x100, 0);
|
|
snd_soc_update_bits(codec, WM8731_LINVOL, 0x100, 0);
|
|
snd_soc_update_bits(codec, WM8731_RINVOL, 0x100, 0);
|
|
|
|
/* Disable bypass path by default */
|
|
snd_soc_update_bits(codec, WM8731_APANA, 0x4, 0);
|
|
|
|
wm8731_codec = codec;
|
|
|
|
ret = snd_soc_register_codec(codec);
|
|
if (ret != 0) {
|
|
dev_err(codec->dev, "Failed to register codec: %d\n", ret);
|
|
goto err;
|
|
}
|
|
|
|
ret = snd_soc_register_dai(&wm8731_dai);
|
|
if (ret != 0) {
|
|
dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
|
|
snd_soc_unregister_codec(codec);
|
|
goto err_codec;
|
|
}
|
|
|
|
return 0;
|
|
|
|
err_codec:
|
|
snd_soc_unregister_codec(codec);
|
|
err:
|
|
kfree(wm8731);
|
|
return ret;
|
|
}
|
|
|
|
static void wm8731_unregister(struct wm8731_priv *wm8731)
|
|
{
|
|
wm8731_set_bias_level(&wm8731->codec, SND_SOC_BIAS_OFF);
|
|
snd_soc_unregister_dai(&wm8731_dai);
|
|
snd_soc_unregister_codec(&wm8731->codec);
|
|
kfree(wm8731);
|
|
wm8731_codec = NULL;
|
|
}
|
|
|
|
#if defined(CONFIG_SPI_MASTER)
|
|
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;
|
|
}
|
|
|
|
static int __devinit wm8731_spi_probe(struct spi_device *spi)
|
|
{
|
|
struct snd_soc_codec *codec;
|
|
struct wm8731_priv *wm8731;
|
|
|
|
wm8731 = kzalloc(sizeof(struct wm8731_priv), GFP_KERNEL);
|
|
if (wm8731 == NULL)
|
|
return -ENOMEM;
|
|
|
|
codec = &wm8731->codec;
|
|
codec->control_data = spi;
|
|
codec->hw_write = (hw_write_t)wm8731_spi_write;
|
|
codec->dev = &spi->dev;
|
|
|
|
dev_set_drvdata(&spi->dev, wm8731);
|
|
|
|
return wm8731_register(wm8731);
|
|
}
|
|
|
|
static int __devexit wm8731_spi_remove(struct spi_device *spi)
|
|
{
|
|
struct wm8731_priv *wm8731 = dev_get_drvdata(&spi->dev);
|
|
|
|
wm8731_unregister(wm8731);
|
|
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int wm8731_spi_suspend(struct spi_device *spi, pm_message_t msg)
|
|
{
|
|
return snd_soc_suspend_device(&spi->dev);
|
|
}
|
|
|
|
static int wm8731_spi_resume(struct spi_device *spi)
|
|
{
|
|
return snd_soc_resume_device(&spi->dev);
|
|
}
|
|
#else
|
|
#define wm8731_spi_suspend NULL
|
|
#define wm8731_spi_resume NULL
|
|
#endif
|
|
|
|
static struct spi_driver wm8731_spi_driver = {
|
|
.driver = {
|
|
.name = "wm8731",
|
|
.bus = &spi_bus_type,
|
|
.owner = THIS_MODULE,
|
|
},
|
|
.probe = wm8731_spi_probe,
|
|
.suspend = wm8731_spi_suspend,
|
|
.resume = wm8731_spi_resume,
|
|
.remove = __devexit_p(wm8731_spi_remove),
|
|
};
|
|
#endif /* CONFIG_SPI_MASTER */
|
|
|
|
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
|
|
static __devinit int wm8731_i2c_probe(struct i2c_client *i2c,
|
|
const struct i2c_device_id *id)
|
|
{
|
|
struct wm8731_priv *wm8731;
|
|
struct snd_soc_codec *codec;
|
|
|
|
wm8731 = kzalloc(sizeof(struct wm8731_priv), GFP_KERNEL);
|
|
if (wm8731 == NULL)
|
|
return -ENOMEM;
|
|
|
|
codec = &wm8731->codec;
|
|
codec->hw_write = (hw_write_t)i2c_master_send;
|
|
|
|
i2c_set_clientdata(i2c, wm8731);
|
|
codec->control_data = i2c;
|
|
|
|
codec->dev = &i2c->dev;
|
|
|
|
return wm8731_register(wm8731);
|
|
}
|
|
|
|
static __devexit int wm8731_i2c_remove(struct i2c_client *client)
|
|
{
|
|
struct wm8731_priv *wm8731 = i2c_get_clientdata(client);
|
|
wm8731_unregister(wm8731);
|
|
return 0;
|
|
}
|
|
|
|
#ifdef CONFIG_PM
|
|
static int wm8731_i2c_suspend(struct i2c_client *i2c, pm_message_t msg)
|
|
{
|
|
return snd_soc_suspend_device(&i2c->dev);
|
|
}
|
|
|
|
static int wm8731_i2c_resume(struct i2c_client *i2c)
|
|
{
|
|
return snd_soc_resume_device(&i2c->dev);
|
|
}
|
|
#else
|
|
#define wm8731_i2c_suspend NULL
|
|
#define wm8731_i2c_resume NULL
|
|
#endif
|
|
|
|
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 = __devexit_p(wm8731_i2c_remove),
|
|
.suspend = wm8731_i2c_suspend,
|
|
.resume = wm8731_i2c_resume,
|
|
.id_table = wm8731_i2c_id,
|
|
};
|
|
#endif
|
|
|
|
static int __init wm8731_modinit(void)
|
|
{
|
|
int ret;
|
|
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
|
|
ret = i2c_add_driver(&wm8731_i2c_driver);
|
|
if (ret != 0) {
|
|
printk(KERN_ERR "Failed to register WM8731 I2C driver: %d\n",
|
|
ret);
|
|
}
|
|
#endif
|
|
#if defined(CONFIG_SPI_MASTER)
|
|
ret = spi_register_driver(&wm8731_spi_driver);
|
|
if (ret != 0) {
|
|
printk(KERN_ERR "Failed to register WM8731 SPI driver: %d\n",
|
|
ret);
|
|
}
|
|
#endif
|
|
return 0;
|
|
}
|
|
module_init(wm8731_modinit);
|
|
|
|
static void __exit wm8731_exit(void)
|
|
{
|
|
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
|
|
i2c_del_driver(&wm8731_i2c_driver);
|
|
#endif
|
|
#if defined(CONFIG_SPI_MASTER)
|
|
spi_unregister_driver(&wm8731_spi_driver);
|
|
#endif
|
|
}
|
|
module_exit(wm8731_exit);
|
|
|
|
MODULE_DESCRIPTION("ASoC WM8731 driver");
|
|
MODULE_AUTHOR("Richard Purdie");
|
|
MODULE_LICENSE("GPL");
|