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kernel-fxtec-pro1x/sound/soc/codecs/wm8940.c
Liam Girdwood f0fba2ad1b ASoC: multi-component - ASoC Multi-Component Support 
This patch extends the ASoC API to allow sound cards to have more than one
CODEC and more than one platform DMA controller. This is achieved by dividing
some current ASoC structures that contain both driver data and device data into
structures that only either contain device data or driver data. i.e.

 struct snd_soc_codec    --->  struct snd_soc_codec (device data)
                          +->  struct snd_soc_codec_driver (driver data)

 struct snd_soc_platform --->  struct snd_soc_platform (device data)
                          +->  struct snd_soc_platform_driver (driver data)

 struct snd_soc_dai      --->  struct snd_soc_dai (device data)
                          +->  struct snd_soc_dai_driver (driver data)

 struct snd_soc_device   --->  deleted

This now allows ASoC to be more tightly aligned with the Linux driver model and
also means that every ASoC codec, platform and (platform) DAI is a kernel
device. ASoC component private data is now stored as device private data.

The ASoC sound card struct snd_soc_card has also been updated to store lists
of it's components rather than a pointer to a codec and platform. The PCM
runtime struct soc_pcm_runtime now has pointers to all its components.

This patch adds DAPM support for ASoC multi-component and removes struct
snd_soc_socdev from DAPM core. All DAPM calls are now made on a card, codec
or runtime PCM level basis rather than using snd_soc_socdev.

Other notable multi-component changes:-

 * Stream operations now de-reference less structures.
 * close_delayed work() now runs on a DAI basis rather than looping all DAIs
   in a card.
 * PM suspend()/resume() operations can now handle N CODECs and Platforms
   per sound card.
 * Added soc_bind_dai_link() to bind the component devices to the sound card.
 * Added soc_dai_link_probe() and soc_dai_link_remove() to probe and remove
   DAI link components.
 * sysfs entries can now be registered per component per card.
 * snd_soc_new_pcms() functionailty rolled into dai_link_probe().
 * snd_soc_register_codec() now does all the codec list and mutex init.

This patch changes the probe() and remove() of the CODEC drivers as follows:-

 o Make CODEC driver a platform driver
 o Moved all struct snd_soc_codec list, mutex, etc initialiasation to core.
 o Removed all static codec pointers (drivers now support > 1 codec dev)
 o snd_soc_register_pcms() now done by core.
 o snd_soc_register_dai() folded into snd_soc_register_codec().

CS4270 portions:
Acked-by: Timur Tabi <timur@freescale.com>

Some TLV320aic23 and Cirrus platform fixes.
Signed-off-by: Ryan Mallon <ryan@bluewatersys.com>

TI CODEC and OMAP fixes
Signed-off-by: Peter Ujfalusi <peter.ujfalusi@nokia.com>
Signed-off-by: Janusz Krzysztofik <jkrzyszt@tis.icnet.pl>
Signed-off-by: Jarkko Nikula <jhnikula@gmail.com>

Samsung platform and misc fixes :-
Signed-off-by: Chanwoo Choi <cw00.choi@samsung.com>
Signed-off-by: Joonyoung Shim <jy0922.shim@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Reviewed-by: Jassi Brar <jassi.brar@samsung.com>
Signed-off-by: Seungwhan Youn <sw.youn@samsung.com>

MPC8610 and PPC fixes.
Signed-off-by: Timur Tabi <timur@freescale.com>

i.MX fixes and some core fixes.
Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>

J4740 platform fixes:-
Signed-off-by: Lars-Peter Clausen <lars@metafoo.de>

CC: Tony Lindgren <tony@atomide.com>
CC: Nicolas Ferre <nicolas.ferre@atmel.com>
CC: Kevin Hilman <khilman@deeprootsystems.com>
CC: Sascha Hauer <s.hauer@pengutronix.de>
CC: Atsushi Nemoto <anemo@mba.ocn.ne.jp>
CC: Kuninori Morimoto <morimoto.kuninori@renesas.com>
CC: Daniel Gloeckner <dg@emlix.com>
CC: Manuel Lauss <mano@roarinelk.homelinux.net>
CC: Mike Frysinger <vapier.adi@gmail.com>
CC: Arnaud Patard <apatard@mandriva.com>
CC: Wan ZongShun <mcuos.com@gmail.com>

Acked-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
Signed-off-by: Liam Girdwood <lrg@slimlogic.co.uk>
2010-08-12 14:00:00 +01:00

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/*
* wm8940.c -- WM8940 ALSA Soc Audio driver
*
* Author: Jonathan Cameron <jic23@cam.ac.uk>
*
* Based on wm8510.c
* Copyright 2006 Wolfson Microelectronics PLC.
* Author: Liam Girdwood <lrg@slimlogic.co.uk>
*
* 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.
*
* Not currently handled:
* Notch filter control
* AUXMode (inverting vs mixer)
* No means to obtain current gain if alc enabled.
* No use made of gpio
* Fast VMID discharge for power down
* Soft Start
* DLR and ALR Swaps not enabled
* Digital Sidetone not supported
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/kernel.h>
#include <linux/init.h>
#include <linux/delay.h>
#include <linux/pm.h>
#include <linux/i2c.h>
#include <linux/platform_device.h>
#include <linux/spi/spi.h>
#include <linux/slab.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <sound/initval.h>
#include <sound/tlv.h>
#include "wm8940.h"
struct wm8940_priv {
unsigned int sysclk;
u16 reg_cache[WM8940_CACHEREGNUM];
enum snd_soc_control_type control_type;
void *control_data;
};
static u16 wm8940_reg_defaults[] = {
0x8940, /* Soft Reset */
0x0000, /* Power 1 */
0x0000, /* Power 2 */
0x0000, /* Power 3 */
0x0010, /* Interface Control */
0x0000, /* Companding Control */
0x0140, /* Clock Control */
0x0000, /* Additional Controls */
0x0000, /* GPIO Control */
0x0002, /* Auto Increment Control */
0x0000, /* DAC Control */
0x00FF, /* DAC Volume */
0,
0,
0x0100, /* ADC Control */
0x00FF, /* ADC Volume */
0x0000, /* Notch Filter 1 Control 1 */
0x0000, /* Notch Filter 1 Control 2 */
0x0000, /* Notch Filter 2 Control 1 */
0x0000, /* Notch Filter 2 Control 2 */
0x0000, /* Notch Filter 3 Control 1 */
0x0000, /* Notch Filter 3 Control 2 */
0x0000, /* Notch Filter 4 Control 1 */
0x0000, /* Notch Filter 4 Control 2 */
0x0032, /* DAC Limit Control 1 */
0x0000, /* DAC Limit Control 2 */
0,
0,
0,
0,
0,
0,
0x0038, /* ALC Control 1 */
0x000B, /* ALC Control 2 */
0x0032, /* ALC Control 3 */
0x0000, /* Noise Gate */
0x0041, /* PLLN */
0x000C, /* PLLK1 */
0x0093, /* PLLK2 */
0x00E9, /* PLLK3 */
0,
0,
0x0030, /* ALC Control 4 */
0,
0x0002, /* Input Control */
0x0050, /* PGA Gain */
0,
0x0002, /* ADC Boost Control */
0,
0x0002, /* Output Control */
0x0000, /* Speaker Mixer Control */
0,
0,
0,
0x0079, /* Speaker Volume */
0,
0x0000, /* Mono Mixer Control */
};
static const char *wm8940_companding[] = { "Off", "NC", "u-law", "A-law" };
static const struct soc_enum wm8940_adc_companding_enum
= SOC_ENUM_SINGLE(WM8940_COMPANDINGCTL, 1, 4, wm8940_companding);
static const struct soc_enum wm8940_dac_companding_enum
= SOC_ENUM_SINGLE(WM8940_COMPANDINGCTL, 3, 4, wm8940_companding);
static const char *wm8940_alc_mode_text[] = {"ALC", "Limiter"};
static const struct soc_enum wm8940_alc_mode_enum
= SOC_ENUM_SINGLE(WM8940_ALC3, 8, 2, wm8940_alc_mode_text);
static const char *wm8940_mic_bias_level_text[] = {"0.9", "0.65"};
static const struct soc_enum wm8940_mic_bias_level_enum
= SOC_ENUM_SINGLE(WM8940_INPUTCTL, 8, 2, wm8940_mic_bias_level_text);
static const char *wm8940_filter_mode_text[] = {"Audio", "Application"};
static const struct soc_enum wm8940_filter_mode_enum
= SOC_ENUM_SINGLE(WM8940_ADC, 7, 2, wm8940_filter_mode_text);
static DECLARE_TLV_DB_SCALE(wm8940_spk_vol_tlv, -5700, 100, 1);
static DECLARE_TLV_DB_SCALE(wm8940_att_tlv, -1000, 1000, 0);
static DECLARE_TLV_DB_SCALE(wm8940_pga_vol_tlv, -1200, 75, 0);
static DECLARE_TLV_DB_SCALE(wm8940_alc_min_tlv, -1200, 600, 0);
static DECLARE_TLV_DB_SCALE(wm8940_alc_max_tlv, 675, 600, 0);
static DECLARE_TLV_DB_SCALE(wm8940_alc_tar_tlv, -2250, 50, 0);
static DECLARE_TLV_DB_SCALE(wm8940_lim_boost_tlv, 0, 100, 0);
static DECLARE_TLV_DB_SCALE(wm8940_lim_thresh_tlv, -600, 100, 0);
static DECLARE_TLV_DB_SCALE(wm8940_adc_tlv, -12750, 50, 1);
static DECLARE_TLV_DB_SCALE(wm8940_capture_boost_vol_tlv, 0, 2000, 0);
static const struct snd_kcontrol_new wm8940_snd_controls[] = {
SOC_SINGLE("Digital Loopback Switch", WM8940_COMPANDINGCTL,
6, 1, 0),
SOC_ENUM("DAC Companding", wm8940_dac_companding_enum),
SOC_ENUM("ADC Companding", wm8940_adc_companding_enum),
SOC_ENUM("ALC Mode", wm8940_alc_mode_enum),
SOC_SINGLE("ALC Switch", WM8940_ALC1, 8, 1, 0),
SOC_SINGLE_TLV("ALC Capture Max Gain", WM8940_ALC1,
3, 7, 1, wm8940_alc_max_tlv),
SOC_SINGLE_TLV("ALC Capture Min Gain", WM8940_ALC1,
0, 7, 0, wm8940_alc_min_tlv),
SOC_SINGLE_TLV("ALC Capture Target", WM8940_ALC2,
0, 14, 0, wm8940_alc_tar_tlv),
SOC_SINGLE("ALC Capture Hold", WM8940_ALC2, 4, 10, 0),
SOC_SINGLE("ALC Capture Decay", WM8940_ALC3, 4, 10, 0),
SOC_SINGLE("ALC Capture Attach", WM8940_ALC3, 0, 10, 0),
SOC_SINGLE("ALC ZC Switch", WM8940_ALC4, 1, 1, 0),
SOC_SINGLE("ALC Capture Noise Gate Switch", WM8940_NOISEGATE,
3, 1, 0),
SOC_SINGLE("ALC Capture Noise Gate Threshold", WM8940_NOISEGATE,
0, 7, 0),
SOC_SINGLE("DAC Playback Limiter Switch", WM8940_DACLIM1, 8, 1, 0),
SOC_SINGLE("DAC Playback Limiter Attack", WM8940_DACLIM1, 0, 9, 0),
SOC_SINGLE("DAC Playback Limiter Decay", WM8940_DACLIM1, 4, 11, 0),
SOC_SINGLE_TLV("DAC Playback Limiter Threshold", WM8940_DACLIM2,
4, 9, 1, wm8940_lim_thresh_tlv),
SOC_SINGLE_TLV("DAC Playback Limiter Boost", WM8940_DACLIM2,
0, 12, 0, wm8940_lim_boost_tlv),
SOC_SINGLE("Capture PGA ZC Switch", WM8940_PGAGAIN, 7, 1, 0),
SOC_SINGLE_TLV("Capture PGA Volume", WM8940_PGAGAIN,
0, 63, 0, wm8940_pga_vol_tlv),
SOC_SINGLE_TLV("Digital Playback Volume", WM8940_DACVOL,
0, 255, 0, wm8940_adc_tlv),
SOC_SINGLE_TLV("Digital Capture Volume", WM8940_ADCVOL,
0, 255, 0, wm8940_adc_tlv),
SOC_ENUM("Mic Bias Level", wm8940_mic_bias_level_enum),
SOC_SINGLE_TLV("Capture Boost Volue", WM8940_ADCBOOST,
8, 1, 0, wm8940_capture_boost_vol_tlv),
SOC_SINGLE_TLV("Speaker Playback Volume", WM8940_SPKVOL,
0, 63, 0, wm8940_spk_vol_tlv),
SOC_SINGLE("Speaker Playback Switch", WM8940_SPKVOL, 6, 1, 1),
SOC_SINGLE_TLV("Speaker Mixer Line Bypass Volume", WM8940_SPKVOL,
8, 1, 1, wm8940_att_tlv),
SOC_SINGLE("Speaker Playback ZC Switch", WM8940_SPKVOL, 7, 1, 0),
SOC_SINGLE("Mono Out Switch", WM8940_MONOMIX, 6, 1, 1),
SOC_SINGLE_TLV("Mono Mixer Line Bypass Volume", WM8940_MONOMIX,
7, 1, 1, wm8940_att_tlv),
SOC_SINGLE("High Pass Filter Switch", WM8940_ADC, 8, 1, 0),
SOC_ENUM("High Pass Filter Mode", wm8940_filter_mode_enum),
SOC_SINGLE("High Pass Filter Cut Off", WM8940_ADC, 4, 7, 0),
SOC_SINGLE("ADC Inversion Switch", WM8940_ADC, 0, 1, 0),
SOC_SINGLE("DAC Inversion Switch", WM8940_DAC, 0, 1, 0),
SOC_SINGLE("DAC Auto Mute Switch", WM8940_DAC, 2, 1, 0),
SOC_SINGLE("ZC Timeout Clock Switch", WM8940_ADDCNTRL, 0, 1, 0),
};
static const struct snd_kcontrol_new wm8940_speaker_mixer_controls[] = {
SOC_DAPM_SINGLE("Line Bypass Switch", WM8940_SPKMIX, 1, 1, 0),
SOC_DAPM_SINGLE("Aux Playback Switch", WM8940_SPKMIX, 5, 1, 0),
SOC_DAPM_SINGLE("PCM Playback Switch", WM8940_SPKMIX, 0, 1, 0),
};
static const struct snd_kcontrol_new wm8940_mono_mixer_controls[] = {
SOC_DAPM_SINGLE("Line Bypass Switch", WM8940_MONOMIX, 1, 1, 0),
SOC_DAPM_SINGLE("Aux Playback Switch", WM8940_MONOMIX, 2, 1, 0),
SOC_DAPM_SINGLE("PCM Playback Switch", WM8940_MONOMIX, 0, 1, 0),
};
static DECLARE_TLV_DB_SCALE(wm8940_boost_vol_tlv, -1500, 300, 1);
static const struct snd_kcontrol_new wm8940_input_boost_controls[] = {
SOC_DAPM_SINGLE("Mic PGA Switch", WM8940_PGAGAIN, 6, 1, 1),
SOC_DAPM_SINGLE_TLV("Aux Volume", WM8940_ADCBOOST,
0, 7, 0, wm8940_boost_vol_tlv),
SOC_DAPM_SINGLE_TLV("Mic Volume", WM8940_ADCBOOST,
4, 7, 0, wm8940_boost_vol_tlv),
};
static const struct snd_kcontrol_new wm8940_micpga_controls[] = {
SOC_DAPM_SINGLE("AUX Switch", WM8940_INPUTCTL, 2, 1, 0),
SOC_DAPM_SINGLE("MICP Switch", WM8940_INPUTCTL, 0, 1, 0),
SOC_DAPM_SINGLE("MICN Switch", WM8940_INPUTCTL, 1, 1, 0),
};
static const struct snd_soc_dapm_widget wm8940_dapm_widgets[] = {
SND_SOC_DAPM_MIXER("Speaker Mixer", WM8940_POWER3, 2, 0,
&wm8940_speaker_mixer_controls[0],
ARRAY_SIZE(wm8940_speaker_mixer_controls)),
SND_SOC_DAPM_MIXER("Mono Mixer", WM8940_POWER3, 3, 0,
&wm8940_mono_mixer_controls[0],
ARRAY_SIZE(wm8940_mono_mixer_controls)),
SND_SOC_DAPM_DAC("DAC", "HiFi Playback", WM8940_POWER3, 0, 0),
SND_SOC_DAPM_PGA("SpkN Out", WM8940_POWER3, 5, 0, NULL, 0),
SND_SOC_DAPM_PGA("SpkP Out", WM8940_POWER3, 6, 0, NULL, 0),
SND_SOC_DAPM_PGA("Mono Out", WM8940_POWER3, 7, 0, NULL, 0),
SND_SOC_DAPM_OUTPUT("MONOOUT"),
SND_SOC_DAPM_OUTPUT("SPKOUTP"),
SND_SOC_DAPM_OUTPUT("SPKOUTN"),
SND_SOC_DAPM_PGA("Aux Input", WM8940_POWER1, 6, 0, NULL, 0),
SND_SOC_DAPM_ADC("ADC", "HiFi Capture", WM8940_POWER2, 0, 0),
SND_SOC_DAPM_MIXER("Mic PGA", WM8940_POWER2, 2, 0,
&wm8940_micpga_controls[0],
ARRAY_SIZE(wm8940_micpga_controls)),
SND_SOC_DAPM_MIXER("Boost Mixer", WM8940_POWER2, 4, 0,
&wm8940_input_boost_controls[0],
ARRAY_SIZE(wm8940_input_boost_controls)),
SND_SOC_DAPM_MICBIAS("Mic Bias", WM8940_POWER1, 4, 0),
SND_SOC_DAPM_INPUT("MICN"),
SND_SOC_DAPM_INPUT("MICP"),
SND_SOC_DAPM_INPUT("AUX"),
};
static const struct snd_soc_dapm_route audio_map[] = {
/* Mono output mixer */
{"Mono Mixer", "PCM Playback Switch", "DAC"},
{"Mono Mixer", "Aux Playback Switch", "Aux Input"},
{"Mono Mixer", "Line Bypass Switch", "Boost Mixer"},
/* Speaker output mixer */
{"Speaker Mixer", "PCM Playback Switch", "DAC"},
{"Speaker Mixer", "Aux Playback Switch", "Aux Input"},
{"Speaker Mixer", "Line Bypass Switch", "Boost Mixer"},
/* Outputs */
{"Mono Out", NULL, "Mono Mixer"},
{"MONOOUT", NULL, "Mono Out"},
{"SpkN Out", NULL, "Speaker Mixer"},
{"SpkP Out", NULL, "Speaker Mixer"},
{"SPKOUTN", NULL, "SpkN Out"},
{"SPKOUTP", NULL, "SpkP Out"},
/* Microphone PGA */
{"Mic PGA", "MICN Switch", "MICN"},
{"Mic PGA", "MICP Switch", "MICP"},
{"Mic PGA", "AUX Switch", "AUX"},
/* Boost Mixer */
{"Boost Mixer", "Mic PGA Switch", "Mic PGA"},
{"Boost Mixer", "Mic Volume", "MICP"},
{"Boost Mixer", "Aux Volume", "Aux Input"},
{"ADC", NULL, "Boost Mixer"},
};
static int wm8940_add_widgets(struct snd_soc_codec *codec)
{
int ret;
ret = snd_soc_dapm_new_controls(codec, wm8940_dapm_widgets,
ARRAY_SIZE(wm8940_dapm_widgets));
if (ret)
goto error_ret;
ret = snd_soc_dapm_add_routes(codec, audio_map, ARRAY_SIZE(audio_map));
if (ret)
goto error_ret;
error_ret:
return ret;
}
#define wm8940_reset(c) snd_soc_write(c, WM8940_SOFTRESET, 0);
static int wm8940_set_dai_fmt(struct snd_soc_dai *codec_dai,
unsigned int fmt)
{
struct snd_soc_codec *codec = codec_dai->codec;
u16 iface = snd_soc_read(codec, WM8940_IFACE) & 0xFE67;
u16 clk = snd_soc_read(codec, WM8940_CLOCK) & 0x1fe;
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBM_CFM:
clk |= 1;
break;
case SND_SOC_DAIFMT_CBS_CFS:
break;
default:
return -EINVAL;
}
snd_soc_write(codec, WM8940_CLOCK, clk);
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_I2S:
iface |= (2 << 3);
break;
case SND_SOC_DAIFMT_LEFT_J:
iface |= (1 << 3);
break;
case SND_SOC_DAIFMT_RIGHT_J:
break;
case SND_SOC_DAIFMT_DSP_A:
iface |= (3 << 3);
break;
case SND_SOC_DAIFMT_DSP_B:
iface |= (3 << 3) | (1 << 7);
break;
}
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_NB_NF:
break;
case SND_SOC_DAIFMT_NB_IF:
iface |= (1 << 7);
break;
case SND_SOC_DAIFMT_IB_NF:
iface |= (1 << 8);
break;
case SND_SOC_DAIFMT_IB_IF:
iface |= (1 << 8) | (1 << 7);
break;
}
snd_soc_write(codec, WM8940_IFACE, iface);
return 0;
}
static int wm8940_i2s_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_codec *codec = rtd->codec;
u16 iface = snd_soc_read(codec, WM8940_IFACE) & 0xFD9F;
u16 addcntrl = snd_soc_read(codec, WM8940_ADDCNTRL) & 0xFFF1;
u16 companding = snd_soc_read(codec,
WM8940_COMPANDINGCTL) & 0xFFDF;
int ret;
/* LoutR control */
if (substream->stream == SNDRV_PCM_STREAM_CAPTURE
&& params_channels(params) == 2)
iface |= (1 << 9);
switch (params_rate(params)) {
case 8000:
addcntrl |= (0x5 << 1);
break;
case 11025:
addcntrl |= (0x4 << 1);
break;
case 16000:
addcntrl |= (0x3 << 1);
break;
case 22050:
addcntrl |= (0x2 << 1);
break;
case 32000:
addcntrl |= (0x1 << 1);
break;
case 44100:
case 48000:
break;
}
ret = snd_soc_write(codec, WM8940_ADDCNTRL, addcntrl);
if (ret)
goto error_ret;
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S8:
companding = companding | (1 << 5);
break;
case SNDRV_PCM_FORMAT_S16_LE:
break;
case SNDRV_PCM_FORMAT_S20_3LE:
iface |= (1 << 5);
break;
case SNDRV_PCM_FORMAT_S24_LE:
iface |= (2 << 5);
break;
case SNDRV_PCM_FORMAT_S32_LE:
iface |= (3 << 5);
break;
}
ret = snd_soc_write(codec, WM8940_COMPANDINGCTL, companding);
if (ret)
goto error_ret;
ret = snd_soc_write(codec, WM8940_IFACE, iface);
error_ret:
return ret;
}
static int wm8940_mute(struct snd_soc_dai *dai, int mute)
{
struct snd_soc_codec *codec = dai->codec;
u16 mute_reg = snd_soc_read(codec, WM8940_DAC) & 0xffbf;
if (mute)
mute_reg |= 0x40;
return snd_soc_write(codec, WM8940_DAC, mute_reg);
}
static int wm8940_set_bias_level(struct snd_soc_codec *codec,
enum snd_soc_bias_level level)
{
u16 val;
u16 pwr_reg = snd_soc_read(codec, WM8940_POWER1) & 0x1F0;
int ret = 0;
switch (level) {
case SND_SOC_BIAS_ON:
/* ensure bufioen and biasen */
pwr_reg |= (1 << 2) | (1 << 3);
/* Enable thermal shutdown */
val = snd_soc_read(codec, WM8940_OUTPUTCTL);
ret = snd_soc_write(codec, WM8940_OUTPUTCTL, val | 0x2);
if (ret)
break;
/* set vmid to 75k */
ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x1);
break;
case SND_SOC_BIAS_PREPARE:
/* ensure bufioen and biasen */
pwr_reg |= (1 << 2) | (1 << 3);
ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x1);
break;
case SND_SOC_BIAS_STANDBY:
/* ensure bufioen and biasen */
pwr_reg |= (1 << 2) | (1 << 3);
/* set vmid to 300k for standby */
ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg | 0x2);
break;
case SND_SOC_BIAS_OFF:
ret = snd_soc_write(codec, WM8940_POWER1, pwr_reg);
break;
}
return ret;
}
struct pll_ {
unsigned int pre_scale:2;
unsigned int n:4;
unsigned int k;
};
static struct pll_ pll_div;
/* The size in bits of the pll divide multiplied by 10
* to allow rounding later */
#define FIXED_PLL_SIZE ((1 << 24) * 10)
static void pll_factors(unsigned int target, unsigned int source)
{
unsigned long long Kpart;
unsigned int K, Ndiv, Nmod;
/* The left shift ist to avoid accuracy loss when right shifting */
Ndiv = target / source;
if (Ndiv > 12) {
source <<= 1;
/* Multiply by 2 */
pll_div.pre_scale = 0;
Ndiv = target / source;
} else if (Ndiv < 3) {
source >>= 2;
/* Divide by 4 */
pll_div.pre_scale = 3;
Ndiv = target / source;
} else if (Ndiv < 6) {
source >>= 1;
/* divide by 2 */
pll_div.pre_scale = 2;
Ndiv = target / source;
} else
pll_div.pre_scale = 1;
if ((Ndiv < 6) || (Ndiv > 12))
printk(KERN_WARNING
"WM8940 N value %d outwith recommended range!d\n",
Ndiv);
pll_div.n = Ndiv;
Nmod = target % source;
Kpart = FIXED_PLL_SIZE * (long long)Nmod;
do_div(Kpart, source);
K = Kpart & 0xFFFFFFFF;
/* Check if we need to round */
if ((K % 10) >= 5)
K += 5;
/* Move down to proper range now rounding is done */
K /= 10;
pll_div.k = K;
}
/* Untested at the moment */
static int wm8940_set_dai_pll(struct snd_soc_dai *codec_dai, int pll_id,
int source, unsigned int freq_in, unsigned int freq_out)
{
struct snd_soc_codec *codec = codec_dai->codec;
u16 reg;
/* Turn off PLL */
reg = snd_soc_read(codec, WM8940_POWER1);
snd_soc_write(codec, WM8940_POWER1, reg & 0x1df);
if (freq_in == 0 || freq_out == 0) {
/* Clock CODEC directly from MCLK */
reg = snd_soc_read(codec, WM8940_CLOCK);
snd_soc_write(codec, WM8940_CLOCK, reg & 0x0ff);
/* Pll power down */
snd_soc_write(codec, WM8940_PLLN, (1 << 7));
return 0;
}
/* Pll is followed by a frequency divide by 4 */
pll_factors(freq_out*4, freq_in);
if (pll_div.k)
snd_soc_write(codec, WM8940_PLLN,
(pll_div.pre_scale << 4) | pll_div.n | (1 << 6));
else /* No factional component */
snd_soc_write(codec, WM8940_PLLN,
(pll_div.pre_scale << 4) | pll_div.n);
snd_soc_write(codec, WM8940_PLLK1, pll_div.k >> 18);
snd_soc_write(codec, WM8940_PLLK2, (pll_div.k >> 9) & 0x1ff);
snd_soc_write(codec, WM8940_PLLK3, pll_div.k & 0x1ff);
/* Enable the PLL */
reg = snd_soc_read(codec, WM8940_POWER1);
snd_soc_write(codec, WM8940_POWER1, reg | 0x020);
/* Run CODEC from PLL instead of MCLK */
reg = snd_soc_read(codec, WM8940_CLOCK);
snd_soc_write(codec, WM8940_CLOCK, reg | 0x100);
return 0;
}
static int wm8940_set_dai_sysclk(struct snd_soc_dai *codec_dai,
int clk_id, unsigned int freq, int dir)
{
struct snd_soc_codec *codec = codec_dai->codec;
struct wm8940_priv *wm8940 = snd_soc_codec_get_drvdata(codec);
switch (freq) {
case 11289600:
case 12000000:
case 12288000:
case 16934400:
case 18432000:
wm8940->sysclk = freq;
return 0;
}
return -EINVAL;
}
static int wm8940_set_dai_clkdiv(struct snd_soc_dai *codec_dai,
int div_id, int div)
{
struct snd_soc_codec *codec = codec_dai->codec;
u16 reg;
int ret = 0;
switch (div_id) {
case WM8940_BCLKDIV:
reg = snd_soc_read(codec, WM8940_CLOCK) & 0xFFEF3;
ret = snd_soc_write(codec, WM8940_CLOCK, reg | (div << 2));
break;
case WM8940_MCLKDIV:
reg = snd_soc_read(codec, WM8940_CLOCK) & 0xFF1F;
ret = snd_soc_write(codec, WM8940_CLOCK, reg | (div << 5));
break;
case WM8940_OPCLKDIV:
reg = snd_soc_read(codec, WM8940_ADDCNTRL) & 0xFFCF;
ret = snd_soc_write(codec, WM8940_ADDCNTRL, reg | (div << 4));
break;
}
return ret;
}
#define WM8940_RATES SNDRV_PCM_RATE_8000_48000
#define WM8940_FORMATS (SNDRV_PCM_FMTBIT_S8 | \
SNDRV_PCM_FMTBIT_S16_LE | \
SNDRV_PCM_FMTBIT_S20_3LE | \
SNDRV_PCM_FMTBIT_S24_LE | \
SNDRV_PCM_FMTBIT_S32_LE)
static struct snd_soc_dai_ops wm8940_dai_ops = {
.hw_params = wm8940_i2s_hw_params,
.set_sysclk = wm8940_set_dai_sysclk,
.digital_mute = wm8940_mute,
.set_fmt = wm8940_set_dai_fmt,
.set_clkdiv = wm8940_set_dai_clkdiv,
.set_pll = wm8940_set_dai_pll,
};
static struct snd_soc_dai_driver wm8940_dai = {
.name = "wm8940-hifi",
.playback = {
.stream_name = "Playback",
.channels_min = 1,
.channels_max = 2,
.rates = WM8940_RATES,
.formats = WM8940_FORMATS,
},
.capture = {
.stream_name = "Capture",
.channels_min = 1,
.channels_max = 2,
.rates = WM8940_RATES,
.formats = WM8940_FORMATS,
},
.ops = &wm8940_dai_ops,
.symmetric_rates = 1,
};
static int wm8940_suspend(struct snd_soc_codec *codec, pm_message_t state)
{
return wm8940_set_bias_level(codec, SND_SOC_BIAS_OFF);
}
static int wm8940_resume(struct snd_soc_codec *codec)
{
int i;
int ret;
u8 data[3];
u16 *cache = codec->reg_cache;
/* Sync reg_cache with the hardware
* Could use auto incremented writes to speed this up
*/
for (i = 0; i < ARRAY_SIZE(wm8940_reg_defaults); i++) {
data[0] = i;
data[1] = (cache[i] & 0xFF00) >> 8;
data[2] = cache[i] & 0x00FF;
ret = codec->hw_write(codec->control_data, data, 3);
if (ret < 0)
goto error_ret;
else if (ret != 3) {
ret = -EIO;
goto error_ret;
}
}
ret = wm8940_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
if (ret)
goto error_ret;
error_ret:
return ret;
}
static int wm8940_probe(struct snd_soc_codec *codec)
{
struct wm8940_priv *wm8940 = snd_soc_codec_get_drvdata(codec);
struct wm8940_setup_data *pdata = codec->dev->platform_data;
int ret;
u16 reg;
codec->control_data = wm8940->control_data;
ret = snd_soc_codec_set_cache_io(codec, 8, 16, wm8940->control_type);
if (ret < 0) {
dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
return ret;
}
ret = wm8940_reset(codec);
if (ret < 0) {
dev_err(codec->dev, "Failed to issue reset\n");
return ret;
}
wm8940_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
ret = snd_soc_write(codec, WM8940_POWER1, 0x180);
if (ret < 0)
return ret;
if (!pdata)
dev_warn(codec->dev, "No platform data supplied\n");
else {
reg = snd_soc_read(codec, WM8940_OUTPUTCTL);
ret = snd_soc_write(codec, WM8940_OUTPUTCTL, reg | pdata->vroi);
if (ret < 0)
return ret;
}
ret = snd_soc_add_controls(codec, wm8940_snd_controls,
ARRAY_SIZE(wm8940_snd_controls));
if (ret)
return ret;
ret = wm8940_add_widgets(codec);
if (ret)
return ret;
return ret;
;
}
static int wm8940_remove(struct snd_soc_codec *codec)
{
wm8940_set_bias_level(codec, SND_SOC_BIAS_OFF);
return 0;
}
static struct snd_soc_codec_driver soc_codec_dev_wm8940 = {
.probe = wm8940_probe,
.remove = wm8940_remove,
.suspend = wm8940_suspend,
.resume = wm8940_resume,
.set_bias_level = wm8940_set_bias_level,
.reg_cache_size = sizeof(wm8940_reg_defaults),
.reg_word_size = sizeof(u16),
.reg_cache_default = wm8940_reg_defaults,
};
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
static __devinit int wm8940_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct wm8940_priv *wm8940;
int ret;
wm8940 = kzalloc(sizeof(struct wm8940_priv), GFP_KERNEL);
if (wm8940 == NULL)
return -ENOMEM;
i2c_set_clientdata(i2c, wm8940);
wm8940->control_data = i2c;
ret = snd_soc_register_codec(&i2c->dev,
&soc_codec_dev_wm8940, &wm8940_dai, 1);
if (ret < 0)
kfree(wm8940);
return ret;
}
static __devexit int wm8940_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 wm8940_i2c_id[] = {
{ "wm8940", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, wm8940_i2c_id);
static struct i2c_driver wm8940_i2c_driver = {
.driver = {
.name = "wm8940-codec",
.owner = THIS_MODULE,
},
.probe = wm8940_i2c_probe,
.remove = __devexit_p(wm8940_i2c_remove),
.id_table = wm8940_i2c_id,
};
#endif
static int __init wm8940_modinit(void)
{
int ret = 0;
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
ret = i2c_add_driver(&wm8940_i2c_driver);
if (ret != 0) {
printk(KERN_ERR "Failed to register wm8940 I2C driver: %d\n",
ret);
}
#endif
return ret;
}
module_init(wm8940_modinit);
static void __exit wm8940_exit(void)
{
#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
i2c_del_driver(&wm8940_i2c_driver);
#endif
}
module_exit(wm8940_exit);
MODULE_DESCRIPTION("ASoC WM8940 driver");
MODULE_AUTHOR("Jonathan Cameron");
MODULE_LICENSE("GPL");
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