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OpenCloudOS-Kernel/sound/soc/s3c24xx/neo1973_wm8753.c

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[ALSA] ASoC S3C24xx machine drivers - Openmoko Neo1973 This patch adds ALSA support for the Openmoko Neo1973 phone. Features:- * HiFi Playback and capture. * Phone calls supported. * Support for BT PCM in WM8753 voice interface. * Support for LM4857 audio amp. Signed-off-by: Graeme Gregory <gg@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lg@opensource.wolfsonmicro.com> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
2007-05-14 17:03:52 +08:00
/*
* neo1973_wm8753.c -- SoC audio for Neo1973
*
* Copyright 2007 Wolfson Microelectronics PLC.
* Author: Graeme Gregory
* graeme.gregory@wolfsonmicro.com or linux@wolfsonmicro.com
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*
* Revision history
* 20th Jan 2007 Initial version.
* 05th Feb 2007 Rename all to Neo1973
*
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/timer.h>
#include <linux/interrupt.h>
#include <linux/platform_device.h>
#include <linux/i2c.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <asm/mach-types.h>
#include <asm/hardware/scoop.h>
#include <asm/arch/regs-clock.h>
#include <asm/arch/regs-gpio.h>
#include <asm/hardware.h>
#include <asm/arch/audio.h>
#include <asm/io.h>
#include <asm/arch/spi-gpio.h>
[ALSA] neo1973: ASoC include pathname fix Fix s3c24xx include file path changes in asoc driver Signed-off-by: Harald Welte <laforge@openmoko.org> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2007-12-19 22:37:49 +08:00
#include <asm/plat-s3c24xx/regs-iis.h>
[ALSA] ASoC S3C24xx machine drivers - Openmoko Neo1973 This patch adds ALSA support for the Openmoko Neo1973 phone. Features:- * HiFi Playback and capture. * Phone calls supported. * Support for BT PCM in WM8753 voice interface. * Support for LM4857 audio amp. Signed-off-by: Graeme Gregory <gg@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lg@opensource.wolfsonmicro.com> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
2007-05-14 17:03:52 +08:00
#include "../codecs/wm8753.h"
#include "lm4857.h"
#include "s3c24xx-pcm.h"
#include "s3c24xx-i2s.h"
/* define the scenarios */
#define NEO_AUDIO_OFF 0
#define NEO_GSM_CALL_AUDIO_HANDSET 1
#define NEO_GSM_CALL_AUDIO_HEADSET 2
#define NEO_GSM_CALL_AUDIO_BLUETOOTH 3
#define NEO_STEREO_TO_SPEAKERS 4
#define NEO_STEREO_TO_HEADPHONES 5
#define NEO_CAPTURE_HANDSET 6
#define NEO_CAPTURE_HEADSET 7
#define NEO_CAPTURE_BLUETOOTH 8
static struct snd_soc_machine neo1973;
static struct i2c_client *i2c;
static int neo1973_hifi_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_codec_dai *codec_dai = rtd->dai->codec_dai;
struct snd_soc_cpu_dai *cpu_dai = rtd->dai->cpu_dai;
unsigned int pll_out = 0, bclk = 0;
int ret = 0;
unsigned long iis_clkrate;
iis_clkrate = s3c24xx_i2s_get_clockrate();
switch (params_rate(params)) {
case 8000:
case 16000:
pll_out = 12288000;
break;
case 48000:
bclk = WM8753_BCLK_DIV_4;
pll_out = 12288000;
break;
case 96000:
bclk = WM8753_BCLK_DIV_2;
pll_out = 12288000;
break;
case 11025:
bclk = WM8753_BCLK_DIV_16;
pll_out = 11289600;
break;
case 22050:
bclk = WM8753_BCLK_DIV_8;
pll_out = 11289600;
break;
case 44100:
bclk = WM8753_BCLK_DIV_4;
pll_out = 11289600;
break;
case 88200:
bclk = WM8753_BCLK_DIV_2;
pll_out = 11289600;
break;
}
/* set codec DAI configuration */
ret = codec_dai->dai_ops.set_fmt(codec_dai,
SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBM_CFM);
if (ret < 0)
return ret;
/* set cpu DAI configuration */
ret = cpu_dai->dai_ops.set_fmt(cpu_dai,
SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBM_CFM);
if (ret < 0)
return ret;
/* set the codec system clock for DAC and ADC */
ret = codec_dai->dai_ops.set_sysclk(codec_dai, WM8753_MCLK, pll_out,
SND_SOC_CLOCK_IN);
if (ret < 0)
return ret;
/* set MCLK division for sample rate */
ret = cpu_dai->dai_ops.set_clkdiv(cpu_dai, S3C24XX_DIV_MCLK,
S3C2410_IISMOD_32FS );
if (ret < 0)
return ret;
/* set codec BCLK division for sample rate */
ret = codec_dai->dai_ops.set_clkdiv(codec_dai, WM8753_BCLKDIV, bclk);
if (ret < 0)
return ret;
/* set prescaler division for sample rate */
ret = cpu_dai->dai_ops.set_clkdiv(cpu_dai, S3C24XX_DIV_PRESCALER,
S3C24XX_PRESCALE(4,4));
if (ret < 0)
return ret;
/* codec PLL input is PCLK/4 */
ret = codec_dai->dai_ops.set_pll(codec_dai, WM8753_PLL1,
iis_clkrate / 4, pll_out);
if (ret < 0)
return ret;
return 0;
}
static int neo1973_hifi_hw_free(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_codec_dai *codec_dai = rtd->dai->codec_dai;
/* disable the PLL */
return codec_dai->dai_ops.set_pll(codec_dai, WM8753_PLL1, 0, 0);
}
/*
* Neo1973 WM8753 HiFi DAI opserations.
*/
static struct snd_soc_ops neo1973_hifi_ops = {
.hw_params = neo1973_hifi_hw_params,
.hw_free = neo1973_hifi_hw_free,
};
static int neo1973_voice_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_codec_dai *codec_dai = rtd->dai->codec_dai;
unsigned int pcmdiv = 0;
int ret = 0;
unsigned long iis_clkrate;
iis_clkrate = s3c24xx_i2s_get_clockrate();
if (params_rate(params) != 8000)
return -EINVAL;
if (params_channels(params) != 1)
return -EINVAL;
pcmdiv = WM8753_PCM_DIV_6; /* 2.048 MHz */
/* todo: gg check mode (DSP_B) against CSR datasheet */
/* set codec DAI configuration */
ret = codec_dai->dai_ops.set_fmt(codec_dai, SND_SOC_DAIFMT_DSP_B |
SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
if (ret < 0)
return ret;
/* set the codec system clock for DAC and ADC */
ret = codec_dai->dai_ops.set_sysclk(codec_dai, WM8753_PCMCLK, 12288000,
SND_SOC_CLOCK_IN);
if (ret < 0)
return ret;
/* set codec PCM division for sample rate */
ret = codec_dai->dai_ops.set_clkdiv(codec_dai, WM8753_PCMDIV, pcmdiv);
if (ret < 0)
return ret;
/* configue and enable PLL for 12.288MHz output */
ret = codec_dai->dai_ops.set_pll(codec_dai, WM8753_PLL2,
iis_clkrate / 4, 12288000);
if (ret < 0)
return ret;
return 0;
}
static int neo1973_voice_hw_free(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_codec_dai *codec_dai = rtd->dai->codec_dai;
/* disable the PLL */
return codec_dai->dai_ops.set_pll(codec_dai, WM8753_PLL2, 0, 0);
}
static struct snd_soc_ops neo1973_voice_ops = {
.hw_params = neo1973_voice_hw_params,
.hw_free = neo1973_voice_hw_free,
};
static int neo1973_scenario = 0;
static int neo1973_get_scenario(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
ucontrol->value.integer.value[0] = neo1973_scenario;
return 0;
}
static int set_scenario_endpoints(struct snd_soc_codec *codec, int scenario)
{
switch(neo1973_scenario) {
case NEO_AUDIO_OFF:
snd_soc_dapm_set_endpoint(codec, "Audio Out", 0);
snd_soc_dapm_set_endpoint(codec, "GSM Line Out", 0);
snd_soc_dapm_set_endpoint(codec, "GSM Line In", 0);
snd_soc_dapm_set_endpoint(codec, "Headset Mic", 0);
snd_soc_dapm_set_endpoint(codec, "Call Mic", 0);
break;
case NEO_GSM_CALL_AUDIO_HANDSET:
snd_soc_dapm_set_endpoint(codec, "Audio Out", 1);
snd_soc_dapm_set_endpoint(codec, "GSM Line Out", 1);
snd_soc_dapm_set_endpoint(codec, "GSM Line In", 1);
snd_soc_dapm_set_endpoint(codec, "Headset Mic", 0);
snd_soc_dapm_set_endpoint(codec, "Call Mic", 1);
break;
case NEO_GSM_CALL_AUDIO_HEADSET:
snd_soc_dapm_set_endpoint(codec, "Audio Out", 1);
snd_soc_dapm_set_endpoint(codec, "GSM Line Out", 1);
snd_soc_dapm_set_endpoint(codec, "GSM Line In", 1);
snd_soc_dapm_set_endpoint(codec, "Headset Mic", 1);
snd_soc_dapm_set_endpoint(codec, "Call Mic", 0);
break;
case NEO_GSM_CALL_AUDIO_BLUETOOTH:
snd_soc_dapm_set_endpoint(codec, "Audio Out", 0);
snd_soc_dapm_set_endpoint(codec, "GSM Line Out", 1);
snd_soc_dapm_set_endpoint(codec, "GSM Line In", 1);
snd_soc_dapm_set_endpoint(codec, "Headset Mic", 0);
snd_soc_dapm_set_endpoint(codec, "Call Mic", 0);
break;
case NEO_STEREO_TO_SPEAKERS:
snd_soc_dapm_set_endpoint(codec, "Audio Out", 1);
snd_soc_dapm_set_endpoint(codec, "GSM Line Out", 0);
snd_soc_dapm_set_endpoint(codec, "GSM Line In", 0);
snd_soc_dapm_set_endpoint(codec, "Headset Mic", 0);
snd_soc_dapm_set_endpoint(codec, "Call Mic", 0);
break;
case NEO_STEREO_TO_HEADPHONES:
snd_soc_dapm_set_endpoint(codec, "Audio Out", 1);
snd_soc_dapm_set_endpoint(codec, "GSM Line Out", 0);
snd_soc_dapm_set_endpoint(codec, "GSM Line In", 0);
snd_soc_dapm_set_endpoint(codec, "Headset Mic", 0);
snd_soc_dapm_set_endpoint(codec, "Call Mic", 0);
break;
case NEO_CAPTURE_HANDSET:
snd_soc_dapm_set_endpoint(codec, "Audio Out", 0);
snd_soc_dapm_set_endpoint(codec, "GSM Line Out", 0);
snd_soc_dapm_set_endpoint(codec, "GSM Line In", 0);
snd_soc_dapm_set_endpoint(codec, "Headset Mic", 0);
snd_soc_dapm_set_endpoint(codec, "Call Mic", 1);
break;
case NEO_CAPTURE_HEADSET:
snd_soc_dapm_set_endpoint(codec, "Audio Out", 0);
snd_soc_dapm_set_endpoint(codec, "GSM Line Out", 0);
snd_soc_dapm_set_endpoint(codec, "GSM Line In", 0);
snd_soc_dapm_set_endpoint(codec, "Headset Mic", 1);
snd_soc_dapm_set_endpoint(codec, "Call Mic", 0);
break;
case NEO_CAPTURE_BLUETOOTH:
snd_soc_dapm_set_endpoint(codec, "Audio Out", 0);
snd_soc_dapm_set_endpoint(codec, "GSM Line Out", 0);
snd_soc_dapm_set_endpoint(codec, "GSM Line In", 0);
snd_soc_dapm_set_endpoint(codec, "Headset Mic", 0);
snd_soc_dapm_set_endpoint(codec, "Call Mic", 0);
break;
default:
snd_soc_dapm_set_endpoint(codec, "Audio Out", 0);
snd_soc_dapm_set_endpoint(codec, "GSM Line Out", 0);
snd_soc_dapm_set_endpoint(codec, "GSM Line In", 0);
snd_soc_dapm_set_endpoint(codec, "Headset Mic", 0);
snd_soc_dapm_set_endpoint(codec, "Call Mic", 0);
}
snd_soc_dapm_sync_endpoints(codec);
return 0;
}
static int neo1973_set_scenario(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
if (neo1973_scenario == ucontrol->value.integer.value[0])
return 0;
neo1973_scenario = ucontrol->value.integer.value[0];
set_scenario_endpoints(codec, neo1973_scenario);
return 1;
}
static u8 lm4857_regs[4] = {0x00, 0x40, 0x80, 0xC0};
static void lm4857_write_regs(void)
{
if (i2c_master_send(i2c, lm4857_regs, 4) != 4)
printk(KERN_ERR "lm4857: i2c write failed\n");
}
static int lm4857_get_reg(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
int reg=kcontrol->private_value & 0xFF;
int shift = (kcontrol->private_value >> 8) & 0x0F;
int mask = (kcontrol->private_value >> 16) & 0xFF;
ucontrol->value.integer.value[0] = (lm4857_regs[reg] >> shift) & mask;
return 0;
}
static int lm4857_set_reg(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
int reg = kcontrol->private_value & 0xFF;
int shift = (kcontrol->private_value >> 8) & 0x0F;
int mask = (kcontrol->private_value >> 16) & 0xFF;
if (((lm4857_regs[reg] >> shift ) & mask) ==
ucontrol->value.integer.value[0])
return 0;
lm4857_regs[reg] &= ~ (mask << shift);
lm4857_regs[reg] |= ucontrol->value.integer.value[0] << shift;
lm4857_write_regs();
return 1;
}
static int lm4857_get_mode(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
u8 value = lm4857_regs[LM4857_CTRL] & 0x0F;
if (value)
value -= 5;
ucontrol->value.integer.value[0] = value;
return 0;
}
static int lm4857_set_mode(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
u8 value = ucontrol->value.integer.value[0];
if (value)
value += 5;
if ((lm4857_regs[LM4857_CTRL] & 0x0F) == value)
return 0;
lm4857_regs[LM4857_CTRL] &= 0xF0;
lm4857_regs[LM4857_CTRL] |= value;
lm4857_write_regs();
return 1;
}
static const struct snd_soc_dapm_widget wm8753_dapm_widgets[] = {
SND_SOC_DAPM_LINE("Audio Out", NULL),
SND_SOC_DAPM_LINE("GSM Line Out", NULL),
SND_SOC_DAPM_LINE("GSM Line In", NULL),
SND_SOC_DAPM_MIC("Headset Mic", NULL),
SND_SOC_DAPM_MIC("Call Mic", NULL),
};
/* example machine audio_mapnections */
static const char* audio_map[][3] = {
/* Connections to the lm4857 amp */
{"Audio Out", NULL, "LOUT1"},
{"Audio Out", NULL, "ROUT1"},
/* Connections to the GSM Module */
{"GSM Line Out", NULL, "MONO1"},
{"GSM Line Out", NULL, "MONO2"},
{"RXP", NULL, "GSM Line In"},
{"RXN", NULL, "GSM Line In"},
/* Connections to Headset */
{"MIC1", NULL, "Mic Bias"},
{"Mic Bias", NULL, "Headset Mic"},
/* Call Mic */
{"MIC2", NULL, "Mic Bias"},
{"MIC2N", NULL, "Mic Bias"},
{"Mic Bias", NULL, "Call Mic"},
/* Connect the ALC pins */
{"ACIN", NULL, "ACOP"},
{NULL, NULL, NULL},
};
static const char *lm4857_mode[] = {
"Off",
"Call Speaker",
"Stereo Speakers",
"Stereo Speakers + Headphones",
"Headphones"
};
static const struct soc_enum lm4857_mode_enum[] = {
SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(lm4857_mode), lm4857_mode),
};
static const char *neo_scenarios[] = {
"Off",
"GSM Handset",
"GSM Headset",
"GSM Bluetooth",
"Speakers",
"Headphones",
"Capture Handset",
"Capture Headset",
"Capture Bluetooth"
};
static const struct soc_enum neo_scenario_enum[] = {
SOC_ENUM_SINGLE_EXT(ARRAY_SIZE(neo_scenarios),neo_scenarios),
};
static const struct snd_kcontrol_new wm8753_neo1973_controls[] = {
SOC_SINGLE_EXT("Amp Left Playback Volume", LM4857_LVOL, 0, 31, 0,
lm4857_get_reg, lm4857_set_reg),
SOC_SINGLE_EXT("Amp Right Playback Volume", LM4857_RVOL, 0, 31, 0,
lm4857_get_reg, lm4857_set_reg),
SOC_SINGLE_EXT("Amp Mono Playback Volume", LM4857_MVOL, 0, 31, 0,
lm4857_get_reg, lm4857_set_reg),
SOC_ENUM_EXT("Amp Mode", lm4857_mode_enum[0],
lm4857_get_mode, lm4857_set_mode),
SOC_ENUM_EXT("Neo Mode", neo_scenario_enum[0],
neo1973_get_scenario, neo1973_set_scenario),
SOC_SINGLE_EXT("Amp Spk 3D Playback Switch", LM4857_LVOL, 5, 1, 0,
lm4857_get_reg, lm4857_set_reg),
SOC_SINGLE_EXT("Amp HP 3d Playback Switch", LM4857_RVOL, 5, 1, 0,
lm4857_get_reg, lm4857_set_reg),
SOC_SINGLE_EXT("Amp Fast Wakeup Playback Switch", LM4857_CTRL, 5, 1, 0,
lm4857_get_reg, lm4857_set_reg),
SOC_SINGLE_EXT("Amp Earpiece 6dB Playback Switch", LM4857_CTRL, 4, 1, 0,
lm4857_get_reg, lm4857_set_reg),
};
/*
* This is an example machine initialisation for a wm8753 connected to a
* neo1973 II. It is missing logic to detect hp/mic insertions and logic
* to re-route the audio in such an event.
*/
static int neo1973_wm8753_init(struct snd_soc_codec *codec)
{
int i, err;
/* set up NC codec pins */
snd_soc_dapm_set_endpoint(codec, "LOUT2", 0);
snd_soc_dapm_set_endpoint(codec, "ROUT2", 0);
snd_soc_dapm_set_endpoint(codec, "OUT3", 0);
snd_soc_dapm_set_endpoint(codec, "OUT4", 0);
snd_soc_dapm_set_endpoint(codec, "LINE1", 0);
snd_soc_dapm_set_endpoint(codec, "LINE2", 0);
/* set endpoints to default mode */
set_scenario_endpoints(codec, NEO_AUDIO_OFF);
/* Add neo1973 specific widgets */
for (i = 0; i < ARRAY_SIZE(wm8753_dapm_widgets); i++)
snd_soc_dapm_new_control(codec, &wm8753_dapm_widgets[i]);
/* add neo1973 specific controls */
for (i = 0; i < ARRAY_SIZE(wm8753_neo1973_controls); i++) {
err = snd_ctl_add(codec->card,
snd_soc_cnew(&wm8753_neo1973_controls[i],
codec, NULL));
if (err < 0)
return err;
}
/* set up neo1973 specific audio path audio_mapnects */
for (i = 0; audio_map[i][0] != NULL; i++) {
snd_soc_dapm_connect_input(codec, audio_map[i][0],
audio_map[i][1], audio_map[i][2]);
}
snd_soc_dapm_sync_endpoints(codec);
return 0;
}
/*
* BT Codec DAI
*/
static struct snd_soc_cpu_dai bt_dai =
{ .name = "Bluetooth",
.id = 0,
.type = SND_SOC_DAI_PCM,
.playback = {
.channels_min = 1,
.channels_max = 1,
.rates = SNDRV_PCM_RATE_8000,
.formats = SNDRV_PCM_FMTBIT_S16_LE,},
.capture = {
.channels_min = 1,
.channels_max = 1,
.rates = SNDRV_PCM_RATE_8000,
.formats = SNDRV_PCM_FMTBIT_S16_LE,},
};
static struct snd_soc_dai_link neo1973_dai[] = {
{ /* Hifi Playback - for similatious use with voice below */
.name = "WM8753",
.stream_name = "WM8753 HiFi",
.cpu_dai = &s3c24xx_i2s_dai,
.codec_dai = &wm8753_dai[WM8753_DAI_HIFI],
.init = neo1973_wm8753_init,
.ops = &neo1973_hifi_ops,
},
{ /* Voice via BT */
.name = "Bluetooth",
.stream_name = "Voice",
.cpu_dai = &bt_dai,
.codec_dai = &wm8753_dai[WM8753_DAI_VOICE],
.ops = &neo1973_voice_ops,
},
};
static struct snd_soc_machine neo1973 = {
.name = "neo1973",
.dai_link = neo1973_dai,
.num_links = ARRAY_SIZE(neo1973_dai),
};
static struct wm8753_setup_data neo1973_wm8753_setup = {
.i2c_address = 0x1a,
};
static struct snd_soc_device neo1973_snd_devdata = {
.machine = &neo1973,
.platform = &s3c24xx_soc_platform,
.codec_dev = &soc_codec_dev_wm8753,
.codec_data = &neo1973_wm8753_setup,
};
static struct i2c_client client_template;
i2c: normal_i2c can be made const (remaining drivers) Signed-off-by: Jean Delvare <khali@linux-fr.org>
2008-01-28 01:14:47 +08:00
static const unsigned short normal_i2c[] = { 0x7C, I2C_CLIENT_END };
[ALSA] ASoC S3C24xx machine drivers - Openmoko Neo1973 This patch adds ALSA support for the Openmoko Neo1973 phone. Features:- * HiFi Playback and capture. * Phone calls supported. * Support for BT PCM in WM8753 voice interface. * Support for LM4857 audio amp. Signed-off-by: Graeme Gregory <gg@opensource.wolfsonmicro.com> Signed-off-by: Liam Girdwood <lg@opensource.wolfsonmicro.com> Signed-off-by: Takashi Iwai <tiwai@suse.de> Signed-off-by: Jaroslav Kysela <perex@suse.cz>
2007-05-14 17:03:52 +08:00
/* Magic definition of all other variables and things */
I2C_CLIENT_INSMOD;
static int lm4857_amp_probe(struct i2c_adapter *adap, int addr, int kind)
{
int ret;
client_template.adapter = adap;
client_template.addr = addr;
i2c = kmemdup(&client_template, sizeof(client_template), GFP_KERNEL);
if (i2c == NULL)
return -ENOMEM;
ret = i2c_attach_client(i2c);
if (ret < 0) {
printk(KERN_ERR "LM4857 failed to attach at addr %x\n", addr);
goto exit_err;
}
lm4857_write_regs();
return ret;
exit_err:
kfree(i2c);
return ret;
}
static int lm4857_i2c_detach(struct i2c_client *client)
{
i2c_detach_client(client);
kfree(client);
return 0;
}
static int lm4857_i2c_attach(struct i2c_adapter *adap)
{
return i2c_probe(adap, &addr_data, lm4857_amp_probe);
}
/* corgi i2c codec control layer */
static struct i2c_driver lm4857_i2c_driver = {
.driver = {
.name = "LM4857 I2C Amp",
.owner = THIS_MODULE,
},
.id = I2C_DRIVERID_LM4857,
.attach_adapter = lm4857_i2c_attach,
.detach_client = lm4857_i2c_detach,
.command = NULL,
};
static struct i2c_client client_template = {
.name = "LM4857",
.driver = &lm4857_i2c_driver,
};
static struct platform_device *neo1973_snd_device;
static int __init neo1973_init(void)
{
int ret;
neo1973_snd_device = platform_device_alloc("soc-audio", -1);
if (!neo1973_snd_device)
return -ENOMEM;
platform_set_drvdata(neo1973_snd_device, &neo1973_snd_devdata);
neo1973_snd_devdata.dev = &neo1973_snd_device->dev;
ret = platform_device_add(neo1973_snd_device);
if (ret)
platform_device_put(neo1973_snd_device);
ret = i2c_add_driver(&lm4857_i2c_driver);
if (ret != 0)
printk(KERN_ERR "can't add i2c driver");
return ret;
}
static void __exit neo1973_exit(void)
{
platform_device_unregister(neo1973_snd_device);
}
module_init(neo1973_init);
module_exit(neo1973_exit);
/* Module information */
MODULE_AUTHOR("Graeme Gregory, graeme.gregory@wolfsonmicro.com, www.wolfsonmicro.com");
MODULE_DESCRIPTION("ALSA SoC WM8753 Neo1973");
MODULE_LICENSE("GPL");