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linux/sound/soc/s3c24xx/neo1973_wm8753.c
Liam Girdwood 64105cfd65 ALSA: asoc: machines - add Digital Audio Interface (DAI) control functions. 
This patch adds several functions for DAI control and config
and replaces the current method of calling function pointers within
the DAI struct within the machine drivers.

Signed-off-by: Liam Girdwood <lg@opensource.wolfsonmicro.com>
Signed-off-by: Takashi Iwai <tiwai@suse.de>
Signed-off-by: Jaroslav Kysela <perex@perex.cz>
2008-07-10 09:32:51 +02:00

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/*
* 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.
*
*/
#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 <sound/tlv.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 <linux/io.h>
#include <asm/arch/spi-gpio.h>
#include <asm/plat-s3c24xx/regs-iis.h>
#include "../codecs/wm8753.h"
#include "lm4857.h"
#include "s3c24xx-pcm.h"
#include "s3c24xx-i2s.h"
/* Debugging stuff */
#define S3C24XX_SOC_NEO1973_WM8753_DEBUG 0
#if S3C24XX_SOC_NEO1973_WM8753_DEBUG
#define DBG(x...) printk(KERN_DEBUG "s3c24xx-soc-neo1973-wm8753: " x)
#else
#define DBG(x...)
#endif
/* 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_dai *codec_dai = rtd->dai->codec_dai;
struct snd_soc_dai *cpu_dai = rtd->dai->cpu_dai;
unsigned int pll_out = 0, bclk = 0;
int ret = 0;
unsigned long iis_clkrate;
DBG("Entered %s\n", __func__);
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 = snd_soc_dai_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 = snd_soc_dai_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 = snd_soc_dai_set_sysclk(codec_dai, WM8753_MCLK, pll_out,
SND_SOC_CLOCK_IN);
if (ret < 0)
return ret;
/* set MCLK division for sample rate */
ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_MCLK,
S3C2410_IISMOD_32FS);
if (ret < 0)
return ret;
/* set codec BCLK division for sample rate */
ret = snd_soc_dai_set_clkdiv(codec_dai, WM8753_BCLKDIV, bclk);
if (ret < 0)
return ret;
/* set prescaler division for sample rate */
ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C24XX_DIV_PRESCALER,
S3C24XX_PRESCALE(4, 4));
if (ret < 0)
return ret;
/* codec PLL input is PCLK/4 */
ret = snd_soc_dai_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_dai *codec_dai = rtd->dai->codec_dai;
DBG("Entered %s\n", __func__);
/* disable the PLL */
return snd_soc_dai_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_dai *codec_dai = rtd->dai->codec_dai;
unsigned int pcmdiv = 0;
int ret = 0;
unsigned long iis_clkrate;
DBG("Entered %s\n", __func__);
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 = snd_soc_dai_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 = snd_soc_dai_set_sysclk(codec_dai, WM8753_PCMCLK, 12288000,
SND_SOC_CLOCK_IN);
if (ret < 0)
return ret;
/* set codec PCM division for sample rate */
ret = snd_soc_dai_set_clkdiv(codec_dai, WM8753_PCMDIV, pcmdiv);
if (ret < 0)
return ret;
/* configue and enable PLL for 12.288MHz output */
ret = snd_soc_dai_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_dai *codec_dai = rtd->dai->codec_dai;
DBG("Entered %s\n", __func__);
/* disable the PLL */
return snd_soc_dai_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;
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)
{
DBG("Entered %s\n", __func__);
switch (neo1973_scenario) {
case NEO_AUDIO_OFF:
snd_soc_dapm_disable_pin(codec, "Audio Out");
snd_soc_dapm_disable_pin(codec, "GSM Line Out");
snd_soc_dapm_disable_pin(codec, "GSM Line In");
snd_soc_dapm_disable_pin(codec, "Headset Mic");
snd_soc_dapm_disable_pin(codec, "Call Mic");
break;
case NEO_GSM_CALL_AUDIO_HANDSET:
snd_soc_dapm_enable_pin(codec, "Audio Out");
snd_soc_dapm_enable_pin(codec, "GSM Line Out");
snd_soc_dapm_enable_pin(codec, "GSM Line In");
snd_soc_dapm_disable_pin(codec, "Headset Mic");
snd_soc_dapm_enable_pin(codec, "Call Mic");
break;
case NEO_GSM_CALL_AUDIO_HEADSET:
snd_soc_dapm_enable_pin(codec, "Audio Out");
snd_soc_dapm_enable_pin(codec, "GSM Line Out");
snd_soc_dapm_enable_pin(codec, "GSM Line In");
snd_soc_dapm_enable_pin(codec, "Headset Mic");
snd_soc_dapm_disable_pin(codec, "Call Mic");
break;
case NEO_GSM_CALL_AUDIO_BLUETOOTH:
snd_soc_dapm_disable_pin(codec, "Audio Out");
snd_soc_dapm_enable_pin(codec, "GSM Line Out");
snd_soc_dapm_enable_pin(codec, "GSM Line In");
snd_soc_dapm_disable_pin(codec, "Headset Mic");
snd_soc_dapm_disable_pin(codec, "Call Mic");
break;
case NEO_STEREO_TO_SPEAKERS:
snd_soc_dapm_enable_pin(codec, "Audio Out");
snd_soc_dapm_disable_pin(codec, "GSM Line Out");
snd_soc_dapm_disable_pin(codec, "GSM Line In");
snd_soc_dapm_disable_pin(codec, "Headset Mic");
snd_soc_dapm_disable_pin(codec, "Call Mic");
break;
case NEO_STEREO_TO_HEADPHONES:
snd_soc_dapm_enable_pin(codec, "Audio Out");
snd_soc_dapm_disable_pin(codec, "GSM Line Out");
snd_soc_dapm_disable_pin(codec, "GSM Line In");
snd_soc_dapm_disable_pin(codec, "Headset Mic");
snd_soc_dapm_disable_pin(codec, "Call Mic");
break;
case NEO_CAPTURE_HANDSET:
snd_soc_dapm_disable_pin(codec, "Audio Out");
snd_soc_dapm_disable_pin(codec, "GSM Line Out");
snd_soc_dapm_disable_pin(codec, "GSM Line In");
snd_soc_dapm_disable_pin(codec, "Headset Mic");
snd_soc_dapm_enable_pin(codec, "Call Mic");
break;
case NEO_CAPTURE_HEADSET:
snd_soc_dapm_disable_pin(codec, "Audio Out");
snd_soc_dapm_disable_pin(codec, "GSM Line Out");
snd_soc_dapm_disable_pin(codec, "GSM Line In");
snd_soc_dapm_enable_pin(codec, "Headset Mic");
snd_soc_dapm_disable_pin(codec, "Call Mic");
break;
case NEO_CAPTURE_BLUETOOTH:
snd_soc_dapm_disable_pin(codec, "Audio Out");
snd_soc_dapm_disable_pin(codec, "GSM Line Out");
snd_soc_dapm_disable_pin(codec, "GSM Line In");
snd_soc_dapm_disable_pin(codec, "Headset Mic");
snd_soc_dapm_disable_pin(codec, "Call Mic");
break;
default:
snd_soc_dapm_disable_pin(codec, "Audio Out");
snd_soc_dapm_disable_pin(codec, "GSM Line Out");
snd_soc_dapm_disable_pin(codec, "GSM Line In");
snd_soc_dapm_disable_pin(codec, "Headset Mic");
snd_soc_dapm_disable_pin(codec, "Call Mic");
}
snd_soc_dapm_sync(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);
DBG("Entered %s\n", __func__);
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)
{
DBG("Entered %s\n", __func__);
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;
DBG("Entered %s\n", __func__);
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;
DBG("Entered %s\n", __func__);
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];
DBG("Entered %s\n", __func__);
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),
};
static const struct snd_soc_dapm_route dapm_routes[] = {
/* 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"},
};
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 DECLARE_TLV_DB_SCALE(stereo_tlv, -4050, 150, 0);
static const DECLARE_TLV_DB_SCALE(mono_tlv, -3450, 150, 0);
static const struct snd_kcontrol_new wm8753_neo1973_controls[] = {
SOC_SINGLE_EXT_TLV("Amp Left Playback Volume", LM4857_LVOL, 0, 31, 0,
lm4857_get_reg, lm4857_set_reg, stereo_tlv),
SOC_SINGLE_EXT_TLV("Amp Right Playback Volume", LM4857_RVOL, 0, 31, 0,
lm4857_get_reg, lm4857_set_reg, stereo_tlv),
SOC_SINGLE_EXT_TLV("Amp Mono Playback Volume", LM4857_MVOL, 0, 31, 0,
lm4857_get_reg, lm4857_set_reg, mono_tlv),
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;
DBG("Entered %s\n", __func__);
/* set up NC codec pins */
snd_soc_dapm_disable_pin(codec, "LOUT2");
snd_soc_dapm_disable_pin(codec, "ROUT2");
snd_soc_dapm_disable_pin(codec, "OUT3");
snd_soc_dapm_disable_pin(codec, "OUT4");
snd_soc_dapm_disable_pin(codec, "LINE1");
snd_soc_dapm_disable_pin(codec, "LINE2");
/* set endpoints to default mode */
set_scenario_endpoints(codec, NEO_AUDIO_OFF);
/* Add neo1973 specific widgets */
snd_soc_dapm_new_controls(codec, wm8753_dapm_widgets,
ARRAY_SIZE(wm8753_dapm_widgets));
/* 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 routes */
err = snd_soc_dapm_add_routes(codec, dapm_routes,
ARRAY_SIZE(dapm_routes));
snd_soc_dapm_sync(codec);
return 0;
}
/*
* BT Codec DAI
*/
static struct snd_soc_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;
static const unsigned short normal_i2c[] = { 0x7C, I2C_CLIENT_END };
/* 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;
DBG("Entered %s\n", __func__);
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)
{
DBG("Entered %s\n", __func__);
i2c_detach_client(client);
kfree(client);
return 0;
}
static int lm4857_i2c_attach(struct i2c_adapter *adap)
{
DBG("Entered %s\n", __func__);
return i2c_probe(adap, &addr_data, lm4857_amp_probe);
}
static u8 lm4857_state;
static int lm4857_suspend(struct i2c_client *dev, pm_message_t state)
{
DBG("Entered %s\n", __func__);
dev_dbg(&dev->dev, "lm4857_suspend\n");
lm4857_state = lm4857_regs[LM4857_CTRL] & 0xf;
if (lm4857_state) {
lm4857_regs[LM4857_CTRL] &= 0xf0;
lm4857_write_regs();
}
return 0;
}
static int lm4857_resume(struct i2c_client *dev)
{
DBG("Entered %s\n", __func__);
if (lm4857_state) {
lm4857_regs[LM4857_CTRL] |= (lm4857_state & 0x0f);
lm4857_write_regs();
}
return 0;
}
static void lm4857_shutdown(struct i2c_client *dev)
{
DBG("Entered %s\n", __func__);
dev_dbg(&dev->dev, "lm4857_shutdown\n");
lm4857_regs[LM4857_CTRL] &= 0xf0;
lm4857_write_regs();
}
/* corgi i2c codec control layer */
static struct i2c_driver lm4857_i2c_driver = {
.driver = {
.name = "LM4857 I2C Amp",
.owner = THIS_MODULE,
},
.id = I2C_DRIVERID_LM4857,
.suspend = lm4857_suspend,
.resume = lm4857_resume,
.shutdown = lm4857_shutdown,
.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;
DBG("Entered %s\n", __func__);
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)
{
DBG("Entered %s\n", __func__);
i2c_del_driver(&lm4857_i2c_driver);
platform_device_unregister(neo1973_snd_device);
}
module_init(neo1973_init);
module_exit(neo1973_exit);
/* Module information */
MODULE_AUTHOR("Graeme Gregory, graeme@openmoko.org, www.openmoko.org");
MODULE_DESCRIPTION("ALSA SoC WM8753 Neo1973");
MODULE_LICENSE("GPL");
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