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kernel-ark/sound/soc/codecs/wm8940.c
Tejun Heo 5a0e3ad6af include cleanup: Update gfp.h and slab.h includes to prepare for breaking implicit slab.h inclusion from percpu.h 
percpu.h is included by sched.h and module.h and thus ends up being
included when building most .c files.  percpu.h includes slab.h which
in turn includes gfp.h making everything defined by the two files
universally available and complicating inclusion dependencies.

percpu.h -> slab.h dependency is about to be removed.  Prepare for
this change by updating users of gfp and slab facilities include those
headers directly instead of assuming availability.  As this conversion
needs to touch large number of source files, the following script is
used as the basis of conversion.

  http://userweb.kernel.org/~tj/misc/slabh-sweep.py

The script does the followings.

* Scan files for gfp and slab usages and update includes such that
  only the necessary includes are there.  ie. if only gfp is used,
  gfp.h, if slab is used, slab.h.

* When the script inserts a new include, it looks at the include
  blocks and try to put the new include such that its order conforms
  to its surrounding.  It's put in the include block which contains
  core kernel includes, in the same order that the rest are ordered -
  alphabetical, Christmas tree, rev-Xmas-tree or at the end if there
  doesn't seem to be any matching order.

* If the script can't find a place to put a new include (mostly
  because the file doesn't have fitting include block), it prints out
  an error message indicating which .h file needs to be added to the
  file.

The conversion was done in the following steps.

1. The initial automatic conversion of all .c files updated slightly
   over 4000 files, deleting around 700 includes and adding ~480 gfp.h
   and ~3000 slab.h inclusions.  The script emitted errors for ~400
   files.

2. Each error was manually checked.  Some didn't need the inclusion,
   some needed manual addition while adding it to implementation .h or
   embedding .c file was more appropriate for others.  This step added
   inclusions to around 150 files.

3. The script was run again and the output was compared to the edits
   from #2 to make sure no file was left behind.

4. Several build tests were done and a couple of problems were fixed.
   e.g. lib/decompress_*.c used malloc/free() wrappers around slab
   APIs requiring slab.h to be added manually.

5. The script was run on all .h files but without automatically
   editing them as sprinkling gfp.h and slab.h inclusions around .h
   files could easily lead to inclusion dependency hell.  Most gfp.h
   inclusion directives were ignored as stuff from gfp.h was usually
   wildly available and often used in preprocessor macros.  Each
   slab.h inclusion directive was examined and added manually as
   necessary.

6. percpu.h was updated not to include slab.h.

7. Build test were done on the following configurations and failures
   were fixed.  CONFIG_GCOV_KERNEL was turned off for all tests (as my
   distributed build env didn't work with gcov compiles) and a few
   more options had to be turned off depending on archs to make things
   build (like ipr on powerpc/64 which failed due to missing writeq).

   * x86 and x86_64 UP and SMP allmodconfig and a custom test config.
   * powerpc and powerpc64 SMP allmodconfig
   * sparc and sparc64 SMP allmodconfig
   * ia64 SMP allmodconfig
   * s390 SMP allmodconfig
   * alpha SMP allmodconfig
   * um on x86_64 SMP allmodconfig

8. percpu.h modifications were reverted so that it could be applied as
   a separate patch and serve as bisection point.

Given the fact that I had only a couple of failures from tests on step
6, I'm fairly confident about the coverage of this conversion patch.
If there is a breakage, it's likely to be something in one of the arch
headers which should be easily discoverable easily on most builds of
the specific arch.

Signed-off-by: Tejun Heo <tj@kernel.org>
Guess-its-ok-by: Christoph Lameter <cl@linux-foundation.org>
Cc: Ingo Molnar <mingo@redhat.com>
Cc: Lee Schermerhorn <Lee.Schermerhorn@hp.com>
2010-03-30 22:02:32 +09:00

911 lines
24 KiB
C
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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];
struct snd_soc_codec codec;
};
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_device *socdev = rtd->socdev;
struct snd_soc_codec *codec = socdev->card->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 = codec->private_data;
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,
};
struct snd_soc_dai wm8940_dai = {
.name = "WM8940",
.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,
};
EXPORT_SYMBOL_GPL(wm8940_dai);
static int wm8940_suspend(struct platform_device *pdev, pm_message_t state)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
struct snd_soc_codec *codec = socdev->card->codec;
return wm8940_set_bias_level(codec, SND_SOC_BIAS_OFF);
}
static int wm8940_resume(struct platform_device *pdev)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
struct snd_soc_codec *codec = socdev->card->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;
ret = wm8940_set_bias_level(codec, codec->suspend_bias_level);
error_ret:
return ret;
}
static struct snd_soc_codec *wm8940_codec;
static int wm8940_probe(struct platform_device *pdev)
{
struct snd_soc_device *socdev = platform_get_drvdata(pdev);
struct snd_soc_codec *codec;
int ret = 0;
if (wm8940_codec == NULL) {
dev_err(&pdev->dev, "Codec device not registered\n");
return -ENODEV;
}
socdev->card->codec = wm8940_codec;
codec = wm8940_codec;
mutex_init(&codec->mutex);
/* 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;
}
ret = snd_soc_add_controls(codec, wm8940_snd_controls,
ARRAY_SIZE(wm8940_snd_controls));
if (ret)
goto error_free_pcms;
ret = wm8940_add_widgets(codec);
if (ret)
goto error_free_pcms;
return ret;
error_free_pcms:
snd_soc_free_pcms(socdev);
snd_soc_dapm_free(socdev);
pcm_err:
return ret;
}
static int wm8940_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_wm8940 = {
.probe = wm8940_probe,
.remove = wm8940_remove,
.suspend = wm8940_suspend,
.resume = wm8940_resume,
};
EXPORT_SYMBOL_GPL(soc_codec_dev_wm8940);
static int wm8940_register(struct wm8940_priv *wm8940,
enum snd_soc_control_type control)
{
struct wm8940_setup_data *pdata = wm8940->codec.dev->platform_data;
struct snd_soc_codec *codec = &wm8940->codec;
int ret;
u16 reg;
if (wm8940_codec) {
dev_err(codec->dev, "Another WM8940 is registered\n");
return -EINVAL;
}
INIT_LIST_HEAD(&codec->dapm_widgets);
INIT_LIST_HEAD(&codec->dapm_paths);
codec->private_data = wm8940;
codec->name = "WM8940";
codec->owner = THIS_MODULE;
codec->bias_level = SND_SOC_BIAS_OFF;
codec->set_bias_level = wm8940_set_bias_level;
codec->dai = &wm8940_dai;
codec->num_dai = 1;
codec->reg_cache_size = ARRAY_SIZE(wm8940_reg_defaults);
codec->reg_cache = &wm8940->reg_cache;
ret = snd_soc_codec_set_cache_io(codec, 8, 16, control);
if (ret < 0) {
dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
return ret;
}
memcpy(codec->reg_cache, wm8940_reg_defaults,
sizeof(wm8940_reg_defaults));
ret = wm8940_reset(codec);
if (ret < 0) {
dev_err(codec->dev, "Failed to issue reset\n");
return ret;
}
wm8940_dai.dev = codec->dev;
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;
}
wm8940_codec = codec;
ret = snd_soc_register_codec(codec);
if (ret) {
dev_err(codec->dev, "Failed to register codec: %d\n", ret);
return ret;
}
ret = snd_soc_register_dai(&wm8940_dai);
if (ret) {
dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
snd_soc_unregister_codec(codec);
return ret;
}
return 0;
}
static void wm8940_unregister(struct wm8940_priv *wm8940)
{
wm8940_set_bias_level(&wm8940->codec, SND_SOC_BIAS_OFF);
snd_soc_unregister_dai(&wm8940_dai);
snd_soc_unregister_codec(&wm8940->codec);
kfree(wm8940);
wm8940_codec = NULL;
}
static int wm8940_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct wm8940_priv *wm8940;
struct snd_soc_codec *codec;
wm8940 = kzalloc(sizeof *wm8940, GFP_KERNEL);
if (wm8940 == NULL)
return -ENOMEM;
codec = &wm8940->codec;
codec->hw_write = (hw_write_t)i2c_master_send;
i2c_set_clientdata(i2c, wm8940);
codec->control_data = i2c;
codec->dev = &i2c->dev;
return wm8940_register(wm8940, SND_SOC_I2C);
}
static int __devexit wm8940_i2c_remove(struct i2c_client *client)
{
struct wm8940_priv *wm8940 = i2c_get_clientdata(client);
wm8940_unregister(wm8940);
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 I2C Codec",
.owner = THIS_MODULE,
},
.probe = wm8940_i2c_probe,
.remove = __devexit_p(wm8940_i2c_remove),
.id_table = wm8940_i2c_id,
};
static int __init wm8940_modinit(void)
{
int ret;
ret = i2c_add_driver(&wm8940_i2c_driver);
if (ret)
printk(KERN_ERR "Failed to register WM8940 I2C driver: %d\n",
ret);
return ret;
}
module_init(wm8940_modinit);
static void __exit wm8940_exit(void)
{
i2c_del_driver(&wm8940_i2c_driver);
}
module_exit(wm8940_exit);
MODULE_DESCRIPTION("ASoC WM8940 driver");
MODULE_AUTHOR("Jonathan Cameron");
MODULE_LICENSE("GPL");
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