linux/sound/soc/codecs/wm8804.c
Lars-Peter Clausen 84b315ee89 ASoC: Drop unused state parameter from CODEC suspend callback
The existence of this parameter is purely historical. None of the CODEC drivers
uses it and we always pass in the same value anyway, so it should be safe to
remove it.

Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>
Acked-by: Liam Girdwood <lrg@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2011-12-02 10:32:03 +00:00

847 lines
20 KiB
C

/*
* wm8804.c -- WM8804 S/PDIF transceiver driver
*
* Copyright 2010 Wolfson Microelectronics plc
*
* Author: Dimitris Papastamos <dp@opensource.wolfsonmicro.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License version 2 as
* published by the Free Software Foundation.
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/i2c.h>
#include <linux/of_device.h>
#include <linux/spi/spi.h>
#include <linux/regulator/consumer.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/initval.h>
#include <sound/tlv.h>
#include "wm8804.h"
#define WM8804_NUM_SUPPLIES 2
static const char *wm8804_supply_names[WM8804_NUM_SUPPLIES] = {
"PVDD",
"DVDD"
};
static const u8 wm8804_reg_defs[] = {
0x05, /* R0 - RST/DEVID1 */
0x88, /* R1 - DEVID2 */
0x04, /* R2 - DEVREV */
0x21, /* R3 - PLL1 */
0xFD, /* R4 - PLL2 */
0x36, /* R5 - PLL3 */
0x07, /* R6 - PLL4 */
0x16, /* R7 - PLL5 */
0x18, /* R8 - PLL6 */
0xFF, /* R9 - SPDMODE */
0x00, /* R10 - INTMASK */
0x00, /* R11 - INTSTAT */
0x00, /* R12 - SPDSTAT */
0x00, /* R13 - RXCHAN1 */
0x00, /* R14 - RXCHAN2 */
0x00, /* R15 - RXCHAN3 */
0x00, /* R16 - RXCHAN4 */
0x00, /* R17 - RXCHAN5 */
0x00, /* R18 - SPDTX1 */
0x00, /* R19 - SPDTX2 */
0x00, /* R20 - SPDTX3 */
0x71, /* R21 - SPDTX4 */
0x0B, /* R22 - SPDTX5 */
0x70, /* R23 - GPO0 */
0x57, /* R24 - GPO1 */
0x00, /* R25 */
0x42, /* R26 - GPO2 */
0x06, /* R27 - AIFTX */
0x06, /* R28 - AIFRX */
0x80, /* R29 - SPDRX1 */
0x07, /* R30 - PWRDN */
};
struct wm8804_priv {
enum snd_soc_control_type control_type;
struct regulator_bulk_data supplies[WM8804_NUM_SUPPLIES];
struct notifier_block disable_nb[WM8804_NUM_SUPPLIES];
struct snd_soc_codec *codec;
};
static int txsrc_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol);
static int txsrc_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol);
/*
* We can't use the same notifier block for more than one supply and
* there's no way I can see to get from a callback to the caller
* except container_of().
*/
#define WM8804_REGULATOR_EVENT(n) \
static int wm8804_regulator_event_##n(struct notifier_block *nb, \
unsigned long event, void *data) \
{ \
struct wm8804_priv *wm8804 = container_of(nb, struct wm8804_priv, \
disable_nb[n]); \
if (event & REGULATOR_EVENT_DISABLE) { \
wm8804->codec->cache_sync = 1; \
} \
return 0; \
}
WM8804_REGULATOR_EVENT(0)
WM8804_REGULATOR_EVENT(1)
static const char *txsrc_text[] = { "S/PDIF RX", "AIF" };
static const SOC_ENUM_SINGLE_EXT_DECL(txsrc, txsrc_text);
static const struct snd_kcontrol_new wm8804_snd_controls[] = {
SOC_ENUM_EXT("Input Source", txsrc, txsrc_get, txsrc_put),
SOC_SINGLE("TX Playback Switch", WM8804_PWRDN, 2, 1, 1),
SOC_SINGLE("AIF Playback Switch", WM8804_PWRDN, 4, 1, 1)
};
static int txsrc_get(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_codec *codec;
unsigned int src;
codec = snd_kcontrol_chip(kcontrol);
src = snd_soc_read(codec, WM8804_SPDTX4);
if (src & 0x40)
ucontrol->value.integer.value[0] = 1;
else
ucontrol->value.integer.value[0] = 0;
return 0;
}
static int txsrc_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_codec *codec;
unsigned int src, txpwr;
codec = snd_kcontrol_chip(kcontrol);
if (ucontrol->value.integer.value[0] != 0
&& ucontrol->value.integer.value[0] != 1)
return -EINVAL;
src = snd_soc_read(codec, WM8804_SPDTX4);
switch ((src & 0x40) >> 6) {
case 0:
if (!ucontrol->value.integer.value[0])
return 0;
break;
case 1:
if (ucontrol->value.integer.value[1])
return 0;
break;
}
/* save the current power state of the transmitter */
txpwr = snd_soc_read(codec, WM8804_PWRDN) & 0x4;
/* power down the transmitter */
snd_soc_update_bits(codec, WM8804_PWRDN, 0x4, 0x4);
/* set the tx source */
snd_soc_update_bits(codec, WM8804_SPDTX4, 0x40,
ucontrol->value.integer.value[0] << 6);
if (ucontrol->value.integer.value[0]) {
/* power down the receiver */
snd_soc_update_bits(codec, WM8804_PWRDN, 0x2, 0x2);
/* power up the AIF */
snd_soc_update_bits(codec, WM8804_PWRDN, 0x10, 0);
} else {
/* don't power down the AIF -- may be used as an output */
/* power up the receiver */
snd_soc_update_bits(codec, WM8804_PWRDN, 0x2, 0);
}
/* restore the transmitter's configuration */
snd_soc_update_bits(codec, WM8804_PWRDN, 0x4, txpwr);
return 0;
}
static int wm8804_volatile(struct snd_soc_codec *codec, unsigned int reg)
{
switch (reg) {
case WM8804_RST_DEVID1:
case WM8804_DEVID2:
case WM8804_DEVREV:
case WM8804_INTSTAT:
case WM8804_SPDSTAT:
case WM8804_RXCHAN1:
case WM8804_RXCHAN2:
case WM8804_RXCHAN3:
case WM8804_RXCHAN4:
case WM8804_RXCHAN5:
return 1;
default:
break;
}
return 0;
}
static int wm8804_reset(struct snd_soc_codec *codec)
{
return snd_soc_write(codec, WM8804_RST_DEVID1, 0x0);
}
static int wm8804_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
struct snd_soc_codec *codec;
u16 format, master, bcp, lrp;
codec = dai->codec;
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
format = 0x2;
break;
case SND_SOC_DAIFMT_RIGHT_J:
format = 0x0;
break;
case SND_SOC_DAIFMT_LEFT_J:
format = 0x1;
break;
case SND_SOC_DAIFMT_DSP_A:
case SND_SOC_DAIFMT_DSP_B:
format = 0x3;
break;
default:
dev_err(dai->dev, "Unknown dai format\n");
return -EINVAL;
}
/* set data format */
snd_soc_update_bits(codec, WM8804_AIFTX, 0x3, format);
snd_soc_update_bits(codec, WM8804_AIFRX, 0x3, format);
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBM_CFM:
master = 1;
break;
case SND_SOC_DAIFMT_CBS_CFS:
master = 0;
break;
default:
dev_err(dai->dev, "Unknown master/slave configuration\n");
return -EINVAL;
}
/* set master/slave mode */
snd_soc_update_bits(codec, WM8804_AIFRX, 0x40, master << 6);
bcp = lrp = 0;
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_NB_NF:
break;
case SND_SOC_DAIFMT_IB_IF:
bcp = lrp = 1;
break;
case SND_SOC_DAIFMT_IB_NF:
bcp = 1;
break;
case SND_SOC_DAIFMT_NB_IF:
lrp = 1;
break;
default:
dev_err(dai->dev, "Unknown polarity configuration\n");
return -EINVAL;
}
/* set frame inversion */
snd_soc_update_bits(codec, WM8804_AIFTX, 0x10 | 0x20,
(bcp << 4) | (lrp << 5));
snd_soc_update_bits(codec, WM8804_AIFRX, 0x10 | 0x20,
(bcp << 4) | (lrp << 5));
return 0;
}
static int wm8804_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct snd_soc_codec *codec;
u16 blen;
codec = dai->codec;
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S16_LE:
blen = 0x0;
break;
case SNDRV_PCM_FORMAT_S20_3LE:
blen = 0x1;
break;
case SNDRV_PCM_FORMAT_S24_LE:
blen = 0x2;
break;
default:
dev_err(dai->dev, "Unsupported word length: %u\n",
params_format(params));
return -EINVAL;
}
/* set word length */
snd_soc_update_bits(codec, WM8804_AIFTX, 0xc, blen << 2);
snd_soc_update_bits(codec, WM8804_AIFRX, 0xc, blen << 2);
return 0;
}
struct pll_div {
u32 prescale:1;
u32 mclkdiv:1;
u32 freqmode:2;
u32 n:4;
u32 k:22;
};
/* PLL rate to output rate divisions */
static struct {
unsigned int div;
unsigned int freqmode;
unsigned int mclkdiv;
} post_table[] = {
{ 2, 0, 0 },
{ 4, 0, 1 },
{ 4, 1, 0 },
{ 8, 1, 1 },
{ 8, 2, 0 },
{ 16, 2, 1 },
{ 12, 3, 0 },
{ 24, 3, 1 }
};
#define FIXED_PLL_SIZE ((1ULL << 22) * 10)
static int pll_factors(struct pll_div *pll_div, unsigned int target,
unsigned int source)
{
u64 Kpart;
unsigned long int K, Ndiv, Nmod, tmp;
int i;
/*
* Scale the output frequency up; the PLL should run in the
* region of 90-100MHz.
*/
for (i = 0; i < ARRAY_SIZE(post_table); i++) {
tmp = target * post_table[i].div;
if (tmp >= 90000000 && tmp <= 100000000) {
pll_div->freqmode = post_table[i].freqmode;
pll_div->mclkdiv = post_table[i].mclkdiv;
target *= post_table[i].div;
break;
}
}
if (i == ARRAY_SIZE(post_table)) {
pr_err("%s: Unable to scale output frequency: %uHz\n",
__func__, target);
return -EINVAL;
}
pll_div->prescale = 0;
Ndiv = target / source;
if (Ndiv < 5) {
source >>= 1;
pll_div->prescale = 1;
Ndiv = target / source;
}
if (Ndiv < 5 || Ndiv > 13) {
pr_err("%s: WM8804 N value is not within the recommended range: %lu\n",
__func__, Ndiv);
return -EINVAL;
}
pll_div->n = Ndiv;
Nmod = target % source;
Kpart = FIXED_PLL_SIZE * (u64)Nmod;
do_div(Kpart, source);
K = Kpart & 0xffffffff;
if ((K % 10) >= 5)
K += 5;
K /= 10;
pll_div->k = K;
return 0;
}
static int wm8804_set_pll(struct snd_soc_dai *dai, int pll_id,
int source, unsigned int freq_in,
unsigned int freq_out)
{
struct snd_soc_codec *codec;
codec = dai->codec;
if (!freq_in || !freq_out) {
/* disable the PLL */
snd_soc_update_bits(codec, WM8804_PWRDN, 0x1, 0x1);
return 0;
} else {
int ret;
struct pll_div pll_div;
ret = pll_factors(&pll_div, freq_out, freq_in);
if (ret)
return ret;
/* power down the PLL before reprogramming it */
snd_soc_update_bits(codec, WM8804_PWRDN, 0x1, 0x1);
if (!freq_in || !freq_out)
return 0;
/* set PLLN and PRESCALE */
snd_soc_update_bits(codec, WM8804_PLL4, 0xf | 0x10,
pll_div.n | (pll_div.prescale << 4));
/* set mclkdiv and freqmode */
snd_soc_update_bits(codec, WM8804_PLL5, 0x3 | 0x8,
pll_div.freqmode | (pll_div.mclkdiv << 3));
/* set PLLK */
snd_soc_write(codec, WM8804_PLL1, pll_div.k & 0xff);
snd_soc_write(codec, WM8804_PLL2, (pll_div.k >> 8) & 0xff);
snd_soc_write(codec, WM8804_PLL3, pll_div.k >> 16);
/* power up the PLL */
snd_soc_update_bits(codec, WM8804_PWRDN, 0x1, 0);
}
return 0;
}
static int wm8804_set_sysclk(struct snd_soc_dai *dai,
int clk_id, unsigned int freq, int dir)
{
struct snd_soc_codec *codec;
codec = dai->codec;
switch (clk_id) {
case WM8804_TX_CLKSRC_MCLK:
if ((freq >= 10000000 && freq <= 14400000)
|| (freq >= 16280000 && freq <= 27000000))
snd_soc_update_bits(codec, WM8804_PLL6, 0x80, 0x80);
else {
dev_err(dai->dev, "OSCCLOCK is not within the "
"recommended range: %uHz\n", freq);
return -EINVAL;
}
break;
case WM8804_TX_CLKSRC_PLL:
snd_soc_update_bits(codec, WM8804_PLL6, 0x80, 0);
break;
case WM8804_CLKOUT_SRC_CLK1:
snd_soc_update_bits(codec, WM8804_PLL6, 0x8, 0);
break;
case WM8804_CLKOUT_SRC_OSCCLK:
snd_soc_update_bits(codec, WM8804_PLL6, 0x8, 0x8);
break;
default:
dev_err(dai->dev, "Unknown clock source: %d\n", clk_id);
return -EINVAL;
}
return 0;
}
static int wm8804_set_clkdiv(struct snd_soc_dai *dai,
int div_id, int div)
{
struct snd_soc_codec *codec;
codec = dai->codec;
switch (div_id) {
case WM8804_CLKOUT_DIV:
snd_soc_update_bits(codec, WM8804_PLL5, 0x30,
(div & 0x3) << 4);
break;
default:
dev_err(dai->dev, "Unknown clock divider: %d\n", div_id);
return -EINVAL;
}
return 0;
}
static void wm8804_sync_cache(struct snd_soc_codec *codec)
{
short i;
u8 *cache;
if (!codec->cache_sync)
return;
codec->cache_only = 0;
cache = codec->reg_cache;
for (i = 0; i < codec->driver->reg_cache_size; i++) {
if (i == WM8804_RST_DEVID1 || cache[i] == wm8804_reg_defs[i])
continue;
snd_soc_write(codec, i, cache[i]);
}
codec->cache_sync = 0;
}
static int wm8804_set_bias_level(struct snd_soc_codec *codec,
enum snd_soc_bias_level level)
{
int ret;
struct wm8804_priv *wm8804;
wm8804 = snd_soc_codec_get_drvdata(codec);
switch (level) {
case SND_SOC_BIAS_ON:
break;
case SND_SOC_BIAS_PREPARE:
/* power up the OSC and the PLL */
snd_soc_update_bits(codec, WM8804_PWRDN, 0x9, 0);
break;
case SND_SOC_BIAS_STANDBY:
if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
ret = regulator_bulk_enable(ARRAY_SIZE(wm8804->supplies),
wm8804->supplies);
if (ret) {
dev_err(codec->dev,
"Failed to enable supplies: %d\n",
ret);
return ret;
}
wm8804_sync_cache(codec);
}
/* power down the OSC and the PLL */
snd_soc_update_bits(codec, WM8804_PWRDN, 0x9, 0x9);
break;
case SND_SOC_BIAS_OFF:
/* power down the OSC and the PLL */
snd_soc_update_bits(codec, WM8804_PWRDN, 0x9, 0x9);
regulator_bulk_disable(ARRAY_SIZE(wm8804->supplies),
wm8804->supplies);
break;
}
codec->dapm.bias_level = level;
return 0;
}
#ifdef CONFIG_PM
static int wm8804_suspend(struct snd_soc_codec *codec)
{
wm8804_set_bias_level(codec, SND_SOC_BIAS_OFF);
return 0;
}
static int wm8804_resume(struct snd_soc_codec *codec)
{
wm8804_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
return 0;
}
#else
#define wm8804_suspend NULL
#define wm8804_resume NULL
#endif
static int wm8804_remove(struct snd_soc_codec *codec)
{
struct wm8804_priv *wm8804;
int i;
wm8804 = snd_soc_codec_get_drvdata(codec);
wm8804_set_bias_level(codec, SND_SOC_BIAS_OFF);
for (i = 0; i < ARRAY_SIZE(wm8804->supplies); ++i)
regulator_unregister_notifier(wm8804->supplies[i].consumer,
&wm8804->disable_nb[i]);
regulator_bulk_free(ARRAY_SIZE(wm8804->supplies), wm8804->supplies);
return 0;
}
static int wm8804_probe(struct snd_soc_codec *codec)
{
struct wm8804_priv *wm8804;
int i, id1, id2, ret;
wm8804 = snd_soc_codec_get_drvdata(codec);
wm8804->codec = codec;
codec->dapm.idle_bias_off = 1;
ret = snd_soc_codec_set_cache_io(codec, 8, 8, wm8804->control_type);
if (ret < 0) {
dev_err(codec->dev, "Failed to set cache i/o: %d\n", ret);
return ret;
}
for (i = 0; i < ARRAY_SIZE(wm8804->supplies); i++)
wm8804->supplies[i].supply = wm8804_supply_names[i];
ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8804->supplies),
wm8804->supplies);
if (ret) {
dev_err(codec->dev, "Failed to request supplies: %d\n", ret);
return ret;
}
wm8804->disable_nb[0].notifier_call = wm8804_regulator_event_0;
wm8804->disable_nb[1].notifier_call = wm8804_regulator_event_1;
/* This should really be moved into the regulator core */
for (i = 0; i < ARRAY_SIZE(wm8804->supplies); i++) {
ret = regulator_register_notifier(wm8804->supplies[i].consumer,
&wm8804->disable_nb[i]);
if (ret != 0) {
dev_err(codec->dev,
"Failed to register regulator notifier: %d\n",
ret);
}
}
ret = regulator_bulk_enable(ARRAY_SIZE(wm8804->supplies),
wm8804->supplies);
if (ret) {
dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
goto err_reg_get;
}
id1 = snd_soc_read(codec, WM8804_RST_DEVID1);
if (id1 < 0) {
dev_err(codec->dev, "Failed to read device ID: %d\n", id1);
ret = id1;
goto err_reg_enable;
}
id2 = snd_soc_read(codec, WM8804_DEVID2);
if (id2 < 0) {
dev_err(codec->dev, "Failed to read device ID: %d\n", id2);
ret = id2;
goto err_reg_enable;
}
id2 = (id2 << 8) | id1;
if (id2 != ((wm8804_reg_defs[WM8804_DEVID2] << 8)
| wm8804_reg_defs[WM8804_RST_DEVID1])) {
dev_err(codec->dev, "Invalid device ID: %#x\n", id2);
ret = -EINVAL;
goto err_reg_enable;
}
ret = snd_soc_read(codec, WM8804_DEVREV);
if (ret < 0) {
dev_err(codec->dev, "Failed to read device revision: %d\n",
ret);
goto err_reg_enable;
}
dev_info(codec->dev, "revision %c\n", ret + 'A');
ret = wm8804_reset(codec);
if (ret < 0) {
dev_err(codec->dev, "Failed to issue reset: %d\n", ret);
goto err_reg_enable;
}
wm8804_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
snd_soc_add_controls(codec, wm8804_snd_controls,
ARRAY_SIZE(wm8804_snd_controls));
return 0;
err_reg_enable:
regulator_bulk_disable(ARRAY_SIZE(wm8804->supplies), wm8804->supplies);
err_reg_get:
regulator_bulk_free(ARRAY_SIZE(wm8804->supplies), wm8804->supplies);
return ret;
}
static const struct snd_soc_dai_ops wm8804_dai_ops = {
.hw_params = wm8804_hw_params,
.set_fmt = wm8804_set_fmt,
.set_sysclk = wm8804_set_sysclk,
.set_clkdiv = wm8804_set_clkdiv,
.set_pll = wm8804_set_pll
};
#define WM8804_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE | \
SNDRV_PCM_FMTBIT_S24_LE)
#define WM8804_RATES (SNDRV_PCM_RATE_32000 | SNDRV_PCM_RATE_44100 | \
SNDRV_PCM_RATE_48000 | SNDRV_PCM_RATE_64000 | \
SNDRV_PCM_RATE_88200 | SNDRV_PCM_RATE_96000 | \
SNDRV_PCM_RATE_176400 | SNDRV_PCM_RATE_192000)
static struct snd_soc_dai_driver wm8804_dai = {
.name = "wm8804-spdif",
.playback = {
.stream_name = "Playback",
.channels_min = 2,
.channels_max = 2,
.rates = WM8804_RATES,
.formats = WM8804_FORMATS,
},
.capture = {
.stream_name = "Capture",
.channels_min = 2,
.channels_max = 2,
.rates = WM8804_RATES,
.formats = WM8804_FORMATS,
},
.ops = &wm8804_dai_ops,
.symmetric_rates = 1
};
static struct snd_soc_codec_driver soc_codec_dev_wm8804 = {
.probe = wm8804_probe,
.remove = wm8804_remove,
.suspend = wm8804_suspend,
.resume = wm8804_resume,
.set_bias_level = wm8804_set_bias_level,
.reg_cache_size = ARRAY_SIZE(wm8804_reg_defs),
.reg_word_size = sizeof(u8),
.reg_cache_default = wm8804_reg_defs,
.volatile_register = wm8804_volatile
};
static const struct of_device_id wm8804_of_match[] = {
{ .compatible = "wlf,wm8804", },
{ }
};
MODULE_DEVICE_TABLE(of, wm8804_of_match);
#if defined(CONFIG_SPI_MASTER)
static int __devinit wm8804_spi_probe(struct spi_device *spi)
{
struct wm8804_priv *wm8804;
int ret;
wm8804 = kzalloc(sizeof *wm8804, GFP_KERNEL);
if (!wm8804)
return -ENOMEM;
wm8804->control_type = SND_SOC_SPI;
spi_set_drvdata(spi, wm8804);
ret = snd_soc_register_codec(&spi->dev,
&soc_codec_dev_wm8804, &wm8804_dai, 1);
if (ret < 0)
kfree(wm8804);
return ret;
}
static int __devexit wm8804_spi_remove(struct spi_device *spi)
{
snd_soc_unregister_codec(&spi->dev);
kfree(spi_get_drvdata(spi));
return 0;
}
static struct spi_driver wm8804_spi_driver = {
.driver = {
.name = "wm8804",
.owner = THIS_MODULE,
.of_match_table = wm8804_of_match,
},
.probe = wm8804_spi_probe,
.remove = __devexit_p(wm8804_spi_remove)
};
#endif
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
static __devinit int wm8804_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct wm8804_priv *wm8804;
int ret;
wm8804 = kzalloc(sizeof *wm8804, GFP_KERNEL);
if (!wm8804)
return -ENOMEM;
wm8804->control_type = SND_SOC_I2C;
i2c_set_clientdata(i2c, wm8804);
ret = snd_soc_register_codec(&i2c->dev,
&soc_codec_dev_wm8804, &wm8804_dai, 1);
if (ret < 0)
kfree(wm8804);
return ret;
}
static __devexit int wm8804_i2c_remove(struct i2c_client *client)
{
snd_soc_unregister_codec(&client->dev);
kfree(i2c_get_clientdata(client));
return 0;
}
static const struct i2c_device_id wm8804_i2c_id[] = {
{ "wm8804", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, wm8804_i2c_id);
static struct i2c_driver wm8804_i2c_driver = {
.driver = {
.name = "wm8804",
.owner = THIS_MODULE,
.of_match_table = wm8804_of_match,
},
.probe = wm8804_i2c_probe,
.remove = __devexit_p(wm8804_i2c_remove),
.id_table = wm8804_i2c_id
};
#endif
static int __init wm8804_modinit(void)
{
int ret = 0;
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
ret = i2c_add_driver(&wm8804_i2c_driver);
if (ret) {
printk(KERN_ERR "Failed to register wm8804 I2C driver: %d\n",
ret);
}
#endif
#if defined(CONFIG_SPI_MASTER)
ret = spi_register_driver(&wm8804_spi_driver);
if (ret != 0) {
printk(KERN_ERR "Failed to register wm8804 SPI driver: %d\n",
ret);
}
#endif
return ret;
}
module_init(wm8804_modinit);
static void __exit wm8804_exit(void)
{
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
i2c_del_driver(&wm8804_i2c_driver);
#endif
#if defined(CONFIG_SPI_MASTER)
spi_unregister_driver(&wm8804_spi_driver);
#endif
}
module_exit(wm8804_exit);
MODULE_DESCRIPTION("ASoC WM8804 driver");
MODULE_AUTHOR("Dimitris Papastamos <dp@opensource.wolfsonmicro.com>");
MODULE_LICENSE("GPL");