/*
* wm8955.c -- WM8955 ALSA SoC Audio driver
*
* Copyright 2009 Wolfson Microelectronics plc
*
* Author: Mark Brown <broonie@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/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 <sound/wm8955.h>
#include "wm8955.h"
#define WM8955_NUM_SUPPLIES 4
static const char *wm8955_supply_names[WM8955_NUM_SUPPLIES] = {
"DCVDD",
"DBVDD",
"HPVDD",
"AVDD",
};
/* codec private data */
struct wm8955_priv {
enum snd_soc_control_type control_type;
unsigned int mclk_rate;
int deemph;
int fs;
struct regulator_bulk_data supplies[WM8955_NUM_SUPPLIES];
};
static const u16 wm8955_reg[WM8955_MAX_REGISTER + 1] = {
0x0000, /* R0 */
0x0000, /* R1 */
0x0079, /* R2 - LOUT1 volume */
0x0079, /* R3 - ROUT1 volume */
0x0000, /* R4 */
0x0008, /* R5 - DAC Control */
0x0000, /* R6 */
0x000A, /* R7 - Audio Interface */
0x0000, /* R8 - Sample Rate */
0x0000, /* R9 */
0x00FF, /* R10 - Left DAC volume */
0x00FF, /* R11 - Right DAC volume */
0x000F, /* R12 - Bass control */
0x000F, /* R13 - Treble control */
0x0000, /* R14 */
0x0000, /* R15 - Reset */
0x0000, /* R16 */
0x0000, /* R17 */
0x0000, /* R18 */
0x0000, /* R19 */
0x0000, /* R20 */
0x0000, /* R21 */
0x0000, /* R22 */
0x00C1, /* R23 - Additional control (1) */
0x0000, /* R24 - Additional control (2) */
0x0000, /* R25 - Power Management (1) */
0x0000, /* R26 - Power Management (2) */
0x0000, /* R27 - Additional Control (3) */
0x0000, /* R28 */
0x0000, /* R29 */
0x0000, /* R30 */
0x0000, /* R31 */
0x0000, /* R32 */
0x0000, /* R33 */
0x0050, /* R34 - Left out Mix (1) */
0x0050, /* R35 - Left out Mix (2) */
0x0050, /* R36 - Right out Mix (1) */
0x0050, /* R37 - Right Out Mix (2) */
0x0050, /* R38 - Mono out Mix (1) */
0x0050, /* R39 - Mono out Mix (2) */
0x0079, /* R40 - LOUT2 volume */
0x0079, /* R41 - ROUT2 volume */
0x0079, /* R42 - MONOOUT volume */
0x0000, /* R43 - Clocking / PLL */
0x0103, /* R44 - PLL Control 1 */
0x0024, /* R45 - PLL Control 2 */
0x01BA, /* R46 - PLL Control 3 */
0x0000, /* R47 */
0x0000, /* R48 */
0x0000, /* R49 */
0x0000, /* R50 */
0x0000, /* R51 */
0x0000, /* R52 */
0x0000, /* R53 */
0x0000, /* R54 */
0x0000, /* R55 */
0x0000, /* R56 */
0x0000, /* R57 */
0x0000, /* R58 */
0x0000, /* R59 - PLL Control 4 */
};
static int wm8955_reset(struct snd_soc_codec *codec)
{
return snd_soc_write(codec, WM8955_RESET, 0);
}
struct pll_factors {
int n;
int k;
int outdiv;
};
/* The size in bits of the FLL divide multiplied by 10
* to allow rounding later */
#define FIXED_FLL_SIZE ((1 << 22) * 10)
static int wm8995_pll_factors(struct device *dev,
int Fref, int Fout, struct pll_factors *pll)
{
u64 Kpart;
unsigned int K, Ndiv, Nmod, target;
dev_dbg(dev, "Fref=%u Fout=%u\n", Fref, Fout);
/* The oscilator should run at should be 90-100MHz, and
* there's a divide by 4 plus an optional divide by 2 in the
* output path to generate the system clock. The clock table
* is sortd so we should always generate a suitable target. */
target = Fout * 4;
if (target < 90000000) {
pll->outdiv = 1;
target *= 2;
} else {
pll->outdiv = 0;
}
WARN_ON(target < 90000000 || target > 100000000);
dev_dbg(dev, "Fvco=%dHz\n", target);
/* Now, calculate N.K */
Ndiv = target / Fref;
pll->n = Ndiv;
Nmod = target % Fref;
dev_dbg(dev, "Nmod=%d\n", Nmod);
/* Calculate fractional part - scale up so we can round. */
Kpart = FIXED_FLL_SIZE * (long long)Nmod;
do_div(Kpart, Fref);
K = Kpart & 0xFFFFFFFF;
if ((K % 10) >= 5)
K += 5;
/* Move down to proper range now rounding is done */
pll->k = K / 10;
dev_dbg(dev, "N=%x K=%x OUTDIV=%x\n", pll->n, pll->k, pll->outdiv);
return 0;
}
/* Lookup table specifying SRATE (table 25 in datasheet); some of the
* output frequencies have been rounded to the standard frequencies
* they are intended to match where the error is slight. */
static struct {
int mclk;
int fs;
int usb;
int sr;
} clock_cfgs[] = {
{ 18432000, 8000, 0, 3, },
{ 18432000, 12000, 0, 9, },
{ 18432000, 16000, 0, 11, },
{ 18432000, 24000, 0, 29, },
{ 18432000, 32000, 0, 13, },
{ 18432000, 48000, 0, 1, },
{ 18432000, 96000, 0, 15, },
{ 16934400, 8018, 0, 19, },
{ 16934400, 11025, 0, 25, },
{ 16934400, 22050, 0, 27, },
{ 16934400, 44100, 0, 17, },
{ 16934400, 88200, 0, 31, },
{ 12000000, 8000, 1, 2, },
{ 12000000, 11025, 1, 25, },
{ 12000000, 12000, 1, 8, },
{ 12000000, 16000, 1, 10, },
{ 12000000, 22050, 1, 27, },
{ 12000000, 24000, 1, 28, },
{ 12000000, 32000, 1, 12, },
{ 12000000, 44100, 1, 17, },
{ 12000000, 48000, 1, 0, },
{ 12000000, 88200, 1, 31, },
{ 12000000, 96000, 1, 14, },
{ 12288000, 8000, 0, 2, },
{ 12288000, 12000, 0, 8, },
{ 12288000, 16000, 0, 10, },
{ 12288000, 24000, 0, 28, },
{ 12288000, 32000, 0, 12, },
{ 12288000, 48000, 0, 0, },
{ 12288000, 96000, 0, 14, },
{ 12289600, 8018, 0, 18, },
{ 12289600, 11025, 0, 24, },
{ 12289600, 22050, 0, 26, },
{ 11289600, 44100, 0, 16, },
{ 11289600, 88200, 0, 31, },
};
static int wm8955_configure_clocking(struct snd_soc_codec *codec)
{
struct wm8955_priv *wm8955 = snd_soc_codec_get_drvdata(codec);
int i, ret, val;
int clocking = 0;
int srate = 0;
int sr = -1;
struct pll_factors pll;
/* If we're not running a sample rate currently just pick one */
if (wm8955->fs == 0)
wm8955->fs = 8000;
/* Can we generate an exact output? */
for (i = 0; i < ARRAY_SIZE(clock_cfgs); i++) {
if (wm8955->fs != clock_cfgs[i].fs)
continue;
sr = i;
if (wm8955->mclk_rate == clock_cfgs[i].mclk)
break;
}
/* We should never get here with an unsupported sample rate */
if (sr == -1) {
dev_err(codec->dev, "Sample rate %dHz unsupported\n",
wm8955->fs);
WARN_ON(sr == -1);
return -EINVAL;
}
if (i == ARRAY_SIZE(clock_cfgs)) {
/* If we can't generate the right clock from MCLK then
* we should configure the PLL to supply us with an
* appropriate clock.
*/
clocking |= WM8955_MCLKSEL;
/* Use the last divider configuration we saw for the
* sample rate. */
ret = wm8995_pll_factors(codec->dev, wm8955->mclk_rate,
clock_cfgs[sr].mclk, &pll);
if (ret != 0) {
dev_err(codec->dev,
"Unable to generate %dHz from %dHz MCLK\n",
wm8955->fs, wm8955->mclk_rate);
return -EINVAL;
}
snd_soc_update_bits(codec, WM8955_PLL_CONTROL_1,
WM8955_N_MASK | WM8955_K_21_18_MASK,
(pll.n << WM8955_N_SHIFT) |
pll.k >> 18);
snd_soc_update_bits(codec, WM8955_PLL_CONTROL_2,
WM8955_K_17_9_MASK,
(pll.k >> 9) & WM8955_K_17_9_MASK);
snd_soc_update_bits(codec, WM8955_PLL_CONTROL_2,
WM8955_K_8_0_MASK,
pll.k & WM8955_K_8_0_MASK);
if (pll.k)
snd_soc_update_bits(codec, WM8955_PLL_CONTROL_4,
WM8955_KEN, WM8955_KEN);
else
snd_soc_update_bits(codec, WM8955_PLL_CONTROL_4,
WM8955_KEN, 0);
if (pll.outdiv)
val = WM8955_PLL_RB | WM8955_PLLOUTDIV2;
else
val = WM8955_PLL_RB;
/* Now start the PLL running */
snd_soc_update_bits(codec, WM8955_CLOCKING_PLL,
WM8955_PLL_RB | WM8955_PLLOUTDIV2, val);
snd_soc_update_bits(codec, WM8955_CLOCKING_PLL,
WM8955_PLLEN, WM8955_PLLEN);
}
srate = clock_cfgs[sr].usb | (clock_cfgs[sr].sr << WM8955_SR_SHIFT);
snd_soc_update_bits(codec, WM8955_SAMPLE_RATE,
WM8955_USB | WM8955_SR_MASK, srate);
snd_soc_update_bits(codec, WM8955_CLOCKING_PLL,
WM8955_MCLKSEL, clocking);
return 0;
}
static int wm8955_sysclk(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kcontrol, int event)
{
struct snd_soc_codec *codec = w->codec;
int ret = 0;
/* Always disable the clocks - if we're doing reconfiguration this
* avoids misclocking.
*/
snd_soc_update_bits(codec, WM8955_POWER_MANAGEMENT_1,
WM8955_DIGENB, 0);
snd_soc_update_bits(codec, WM8955_CLOCKING_PLL,
WM8955_PLL_RB | WM8955_PLLEN, 0);
switch (event) {
case SND_SOC_DAPM_POST_PMD:
break;
case SND_SOC_DAPM_PRE_PMU:
ret = wm8955_configure_clocking(codec);
break;
default:
ret = -EINVAL;
break;
}
return ret;
}
static int deemph_settings[] = { 0, 32000, 44100, 48000 };
static int wm8955_set_deemph(struct snd_soc_codec *codec)
{
struct wm8955_priv *wm8955 = snd_soc_codec_get_drvdata(codec);
int val, i, best;
/* If we're using deemphasis select the nearest available sample
* rate.
*/
if (wm8955->deemph) {
best = 1;
for (i = 2; i < ARRAY_SIZE(deemph_settings); i++) {
if (abs(deemph_settings[i] - wm8955->fs) <
abs(deemph_settings[best] - wm8955->fs))
best = i;
}
val = best << WM8955_DEEMPH_SHIFT;
} else {
val = 0;
}
dev_dbg(codec->dev, "Set deemphasis %d\n", val);
return snd_soc_update_bits(codec, WM8955_DAC_CONTROL,
WM8955_DEEMPH_MASK, val);
}
static int wm8955_get_deemph(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
struct wm8955_priv *wm8955 = snd_soc_codec_get_drvdata(codec);
ucontrol->value.enumerated.item[0] = wm8955->deemph;
return 0;
}
static int wm8955_put_deemph(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_codec *codec = snd_kcontrol_chip(kcontrol);
struct wm8955_priv *wm8955 = snd_soc_codec_get_drvdata(codec);
int deemph = ucontrol->value.enumerated.item[0];
if (deemph > 1)
return -EINVAL;
wm8955->deemph = deemph;
return wm8955_set_deemph(codec);
}
static const char *bass_mode_text[] = {
"Linear", "Adaptive",
};
static const struct soc_enum bass_mode =
SOC_ENUM_SINGLE(WM8955_BASS_CONTROL, 7, 2, bass_mode_text);
static const char *bass_cutoff_text[] = {
"Low", "High"
};
static const struct soc_enum bass_cutoff =
SOC_ENUM_SINGLE(WM8955_BASS_CONTROL, 6, 2, bass_cutoff_text);
static const char *treble_cutoff_text[] = {
"High", "Low"
};
static const struct soc_enum treble_cutoff =
SOC_ENUM_SINGLE(WM8955_TREBLE_CONTROL, 6, 2, treble_cutoff_text);
static const DECLARE_TLV_DB_SCALE(digital_tlv, -12750, 50, 1);
static const DECLARE_TLV_DB_SCALE(atten_tlv, -600, 600, 0);
static const DECLARE_TLV_DB_SCALE(bypass_tlv, -1500, 300, 0);
static const DECLARE_TLV_DB_SCALE(mono_tlv, -2100, 300, 0);
static const DECLARE_TLV_DB_SCALE(out_tlv, -12100, 100, 1);
static const DECLARE_TLV_DB_SCALE(treble_tlv, -1200, 150, 1);
static const struct snd_kcontrol_new wm8955_snd_controls[] = {
SOC_DOUBLE_R_TLV("Digital Playback Volume", WM8955_LEFT_DAC_VOLUME,
WM8955_RIGHT_DAC_VOLUME, 0, 255, 0, digital_tlv),
SOC_SINGLE_TLV("Playback Attenuation Volume", WM8955_DAC_CONTROL, 7, 1, 1,
atten_tlv),
SOC_SINGLE_BOOL_EXT("DAC Deemphasis Switch", 0,
wm8955_get_deemph, wm8955_put_deemph),
SOC_ENUM("Bass Mode", bass_mode),
SOC_ENUM("Bass Cutoff", bass_cutoff),
SOC_SINGLE("Bass Volume", WM8955_BASS_CONTROL, 0, 15, 1),
SOC_ENUM("Treble Cutoff", treble_cutoff),
SOC_SINGLE_TLV("Treble Volume", WM8955_TREBLE_CONTROL, 0, 14, 1, treble_tlv),
SOC_SINGLE_TLV("Left Bypass Volume", WM8955_LEFT_OUT_MIX_1, 4, 7, 1,
bypass_tlv),
SOC_SINGLE_TLV("Left Mono Volume", WM8955_LEFT_OUT_MIX_2, 4, 7, 1,
bypass_tlv),
SOC_SINGLE_TLV("Right Mono Volume", WM8955_RIGHT_OUT_MIX_1, 4, 7, 1,
bypass_tlv),
SOC_SINGLE_TLV("Right Bypass Volume", WM8955_RIGHT_OUT_MIX_2, 4, 7, 1,
bypass_tlv),
/* Not a stereo pair so they line up with the DAPM switches */
SOC_SINGLE_TLV("Mono Left Bypass Volume", WM8955_MONO_OUT_MIX_1, 4, 7, 1,
mono_tlv),
SOC_SINGLE_TLV("Mono Right Bypass Volume", WM8955_MONO_OUT_MIX_2, 4, 7, 1,
mono_tlv),
SOC_DOUBLE_R_TLV("Headphone Volume", WM8955_LOUT1_VOLUME,
WM8955_ROUT1_VOLUME, 0, 127, 0, out_tlv),
SOC_DOUBLE_R("Headphone ZC Switch", WM8955_LOUT1_VOLUME,
WM8955_ROUT1_VOLUME, 7, 1, 0),
SOC_DOUBLE_R_TLV("Speaker Volume", WM8955_LOUT2_VOLUME,
WM8955_ROUT2_VOLUME, 0, 127, 0, out_tlv),
SOC_DOUBLE_R("Speaker ZC Switch", WM8955_LOUT2_VOLUME,
WM8955_ROUT2_VOLUME, 7, 1, 0),
SOC_SINGLE_TLV("Mono Volume", WM8955_MONOOUT_VOLUME, 0, 127, 0, out_tlv),
SOC_SINGLE("Mono ZC Switch", WM8955_MONOOUT_VOLUME, 7, 1, 0),
};
static const struct snd_kcontrol_new lmixer[] = {
SOC_DAPM_SINGLE("Playback Switch", WM8955_LEFT_OUT_MIX_1, 8, 1, 0),
SOC_DAPM_SINGLE("Bypass Switch", WM8955_LEFT_OUT_MIX_1, 7, 1, 0),
SOC_DAPM_SINGLE("Right Playback Switch", WM8955_LEFT_OUT_MIX_2, 8, 1, 0),
SOC_DAPM_SINGLE("Mono Switch", WM8955_LEFT_OUT_MIX_2, 7, 1, 0),
};
static const struct snd_kcontrol_new rmixer[] = {
SOC_DAPM_SINGLE("Left Playback Switch", WM8955_RIGHT_OUT_MIX_1, 8, 1, 0),
SOC_DAPM_SINGLE("Mono Switch", WM8955_RIGHT_OUT_MIX_1, 7, 1, 0),
SOC_DAPM_SINGLE("Playback Switch", WM8955_RIGHT_OUT_MIX_2, 8, 1, 0),
SOC_DAPM_SINGLE("Bypass Switch", WM8955_RIGHT_OUT_MIX_2, 7, 1, 0),
};
static const struct snd_kcontrol_new mmixer[] = {
SOC_DAPM_SINGLE("Left Playback Switch", WM8955_MONO_OUT_MIX_1, 8, 1, 0),
SOC_DAPM_SINGLE("Left Bypass Switch", WM8955_MONO_OUT_MIX_1, 7, 1, 0),
SOC_DAPM_SINGLE("Right Playback Switch", WM8955_MONO_OUT_MIX_2, 8, 1, 0),
SOC_DAPM_SINGLE("Right Bypass Switch", WM8955_MONO_OUT_MIX_2, 7, 1, 0),
};
static const struct snd_soc_dapm_widget wm8955_dapm_widgets[] = {
SND_SOC_DAPM_INPUT("MONOIN-"),
SND_SOC_DAPM_INPUT("MONOIN+"),
SND_SOC_DAPM_INPUT("LINEINR"),
SND_SOC_DAPM_INPUT("LINEINL"),
SND_SOC_DAPM_PGA("Mono Input", SND_SOC_NOPM, 0, 0, NULL, 0),
SND_SOC_DAPM_SUPPLY("SYSCLK", WM8955_POWER_MANAGEMENT_1, 0, 1, wm8955_sysclk,
SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
SND_SOC_DAPM_SUPPLY("TSDEN", WM8955_ADDITIONAL_CONTROL_1, 8, 0, NULL, 0),
SND_SOC_DAPM_DAC("DACL", "Playback", WM8955_POWER_MANAGEMENT_2, 8, 0),
SND_SOC_DAPM_DAC("DACR", "Playback", WM8955_POWER_MANAGEMENT_2, 7, 0),
SND_SOC_DAPM_PGA("LOUT1 PGA", WM8955_POWER_MANAGEMENT_2, 6, 0, NULL, 0),
SND_SOC_DAPM_PGA("ROUT1 PGA", WM8955_POWER_MANAGEMENT_2, 5, 0, NULL, 0),
SND_SOC_DAPM_PGA("LOUT2 PGA", WM8955_POWER_MANAGEMENT_2, 4, 0, NULL, 0),
SND_SOC_DAPM_PGA("ROUT2 PGA", WM8955_POWER_MANAGEMENT_2, 3, 0, NULL, 0),
SND_SOC_DAPM_PGA("MOUT PGA", WM8955_POWER_MANAGEMENT_2, 2, 0, NULL, 0),
SND_SOC_DAPM_PGA("OUT3 PGA", WM8955_POWER_MANAGEMENT_2, 1, 0, NULL, 0),
/* The names are chosen to make the control names nice */
SND_SOC_DAPM_MIXER("Left", SND_SOC_NOPM, 0, 0,
lmixer, ARRAY_SIZE(lmixer)),
SND_SOC_DAPM_MIXER("Right", SND_SOC_NOPM, 0, 0,
rmixer, ARRAY_SIZE(rmixer)),
SND_SOC_DAPM_MIXER("Mono", SND_SOC_NOPM, 0, 0,
mmixer, ARRAY_SIZE(mmixer)),
SND_SOC_DAPM_OUTPUT("LOUT1"),
SND_SOC_DAPM_OUTPUT("ROUT1"),
SND_SOC_DAPM_OUTPUT("LOUT2"),
SND_SOC_DAPM_OUTPUT("ROUT2"),
SND_SOC_DAPM_OUTPUT("MONOOUT"),
SND_SOC_DAPM_OUTPUT("OUT3"),
};
static const struct snd_soc_dapm_route wm8955_intercon[] = {
{ "DACL", NULL, "SYSCLK" },
{ "DACR", NULL, "SYSCLK" },
{ "Mono Input", NULL, "MONOIN-" },
{ "Mono Input", NULL, "MONOIN+" },
{ "Left", "Playback Switch", "DACL" },
{ "Left", "Right Playback Switch", "DACR" },
{ "Left", "Bypass Switch", "LINEINL" },
{ "Left", "Mono Switch", "Mono Input" },
{ "Right", "Playback Switch", "DACR" },
{ "Right", "Left Playback Switch", "DACL" },
{ "Right", "Bypass Switch", "LINEINR" },
{ "Right", "Mono Switch", "Mono Input" },
{ "Mono", "Left Playback Switch", "DACL" },
{ "Mono", "Right Playback Switch", "DACR" },
{ "Mono", "Left Bypass Switch", "LINEINL" },
{ "Mono", "Right Bypass Switch", "LINEINR" },
{ "LOUT1 PGA", NULL, "Left" },
{ "LOUT1", NULL, "TSDEN" },
{ "LOUT1", NULL, "LOUT1 PGA" },
{ "ROUT1 PGA", NULL, "Right" },
{ "ROUT1", NULL, "TSDEN" },
{ "ROUT1", NULL, "ROUT1 PGA" },
{ "LOUT2 PGA", NULL, "Left" },
{ "LOUT2", NULL, "TSDEN" },
{ "LOUT2", NULL, "LOUT2 PGA" },
{ "ROUT2 PGA", NULL, "Right" },
{ "ROUT2", NULL, "TSDEN" },
{ "ROUT2", NULL, "ROUT2 PGA" },
{ "MOUT PGA", NULL, "Mono" },
{ "MONOOUT", NULL, "MOUT PGA" },
/* OUT3 not currently implemented */
{ "OUT3", NULL, "OUT3 PGA" },
};
static int wm8955_add_widgets(struct snd_soc_codec *codec)
{
struct snd_soc_dapm_context *dapm = &codec->dapm;
snd_soc_add_controls(codec, wm8955_snd_controls,
ARRAY_SIZE(wm8955_snd_controls));
snd_soc_dapm_new_controls(dapm, wm8955_dapm_widgets,
ARRAY_SIZE(wm8955_dapm_widgets));
snd_soc_dapm_add_routes(dapm, wm8955_intercon,
ARRAY_SIZE(wm8955_intercon));
return 0;
}
static int wm8955_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params,
struct snd_soc_dai *dai)
{
struct snd_soc_codec *codec = dai->codec;
struct wm8955_priv *wm8955 = snd_soc_codec_get_drvdata(codec);
int ret;
int wl;
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S16_LE:
wl = 0;
break;
case SNDRV_PCM_FORMAT_S20_3LE:
wl = 0x4;
break;
case SNDRV_PCM_FORMAT_S24_LE:
wl = 0x8;
break;
case SNDRV_PCM_FORMAT_S32_LE:
wl = 0xc;
break;
default:
return -EINVAL;
}
snd_soc_update_bits(codec, WM8955_AUDIO_INTERFACE,
WM8955_WL_MASK, wl);
wm8955->fs = params_rate(params);
wm8955_set_deemph(codec);
/* If the chip is clocked then disable the clocks and force a
* reconfiguration, otherwise DAPM will power up the
* clocks for us later. */
ret = snd_soc_read(codec, WM8955_POWER_MANAGEMENT_1);
if (ret < 0)
return ret;
if (ret & WM8955_DIGENB) {
snd_soc_update_bits(codec, WM8955_POWER_MANAGEMENT_1,
WM8955_DIGENB, 0);
snd_soc_update_bits(codec, WM8955_CLOCKING_PLL,
WM8955_PLL_RB | WM8955_PLLEN, 0);
wm8955_configure_clocking(codec);
}
return 0;
}
static int wm8955_set_sysclk(struct snd_soc_dai *dai, int clk_id,
unsigned int freq, int dir)
{
struct snd_soc_codec *codec = dai->codec;
struct wm8955_priv *priv = snd_soc_codec_get_drvdata(codec);
int div;
switch (clk_id) {
case WM8955_CLK_MCLK:
if (freq > 15000000) {
priv->mclk_rate = freq /= 2;
div = WM8955_MCLKDIV2;
} else {
priv->mclk_rate = freq;
div = 0;
}
snd_soc_update_bits(codec, WM8955_SAMPLE_RATE,
WM8955_MCLKDIV2, div);
break;
default:
return -EINVAL;
}
dev_dbg(dai->dev, "Clock source is %d at %uHz\n", clk_id, freq);
return 0;
}
static int wm8955_set_fmt(struct snd_soc_dai *dai, unsigned int fmt)
{
struct snd_soc_codec *codec = dai->codec;
u16 aif = 0;
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBS_CFS:
break;
case SND_SOC_DAIFMT_CBM_CFM:
aif |= WM8955_MS;
break;
default:
return -EINVAL;
}
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_DSP_B:
aif |= WM8955_LRP;
case SND_SOC_DAIFMT_DSP_A:
aif |= 0x3;
break;
case SND_SOC_DAIFMT_I2S:
aif |= 0x2;
break;
case SND_SOC_DAIFMT_RIGHT_J:
break;
case SND_SOC_DAIFMT_LEFT_J:
aif |= 0x1;
break;
default:
return -EINVAL;
}
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_DSP_A:
case SND_SOC_DAIFMT_DSP_B:
/* frame inversion not valid for DSP modes */
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_NB_NF:
break;
case SND_SOC_DAIFMT_IB_NF:
aif |= WM8955_BCLKINV;
break;
default:
return -EINVAL;
}
break;
case SND_SOC_DAIFMT_I2S:
case SND_SOC_DAIFMT_RIGHT_J:
case SND_SOC_DAIFMT_LEFT_J:
switch (fmt & SND_SOC_DAIFMT_INV_MASK) {
case SND_SOC_DAIFMT_NB_NF:
break;
case SND_SOC_DAIFMT_IB_IF:
aif |= WM8955_BCLKINV | WM8955_LRP;
break;
case SND_SOC_DAIFMT_IB_NF:
aif |= WM8955_BCLKINV;
break;
case SND_SOC_DAIFMT_NB_IF:
aif |= WM8955_LRP;
break;
default:
return -EINVAL;
}
break;
default:
return -EINVAL;
}
snd_soc_update_bits(codec, WM8955_AUDIO_INTERFACE,
WM8955_MS | WM8955_FORMAT_MASK | WM8955_BCLKINV |
WM8955_LRP, aif);
return 0;
}
static int wm8955_digital_mute(struct snd_soc_dai *codec_dai, int mute)
{
struct snd_soc_codec *codec = codec_dai->codec;
int val;
if (mute)
val = WM8955_DACMU;
else
val = 0;
snd_soc_update_bits(codec, WM8955_DAC_CONTROL, WM8955_DACMU, val);
return 0;
}
static int wm8955_set_bias_level(struct snd_soc_codec *codec,
enum snd_soc_bias_level level)
{
struct wm8955_priv *wm8955 = snd_soc_codec_get_drvdata(codec);
u16 *reg_cache = codec->reg_cache;
int ret, i;
switch (level) {
case SND_SOC_BIAS_ON:
break;
case SND_SOC_BIAS_PREPARE:
/* VMID resistance 2*50k */
snd_soc_update_bits(codec, WM8955_POWER_MANAGEMENT_1,
WM8955_VMIDSEL_MASK,
0x1 << WM8955_VMIDSEL_SHIFT);
/* Default bias current */
snd_soc_update_bits(codec, WM8955_ADDITIONAL_CONTROL_1,
WM8955_VSEL_MASK,
0x2 << WM8955_VSEL_SHIFT);
break;
case SND_SOC_BIAS_STANDBY:
if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
ret = regulator_bulk_enable(ARRAY_SIZE(wm8955->supplies),
wm8955->supplies);
if (ret != 0) {
dev_err(codec->dev,
"Failed to enable supplies: %d\n",
ret);
return ret;
}
snd_soc_cache_sync(codec);
/* Enable VREF and VMID */
snd_soc_update_bits(codec, WM8955_POWER_MANAGEMENT_1,
WM8955_VREF |
WM8955_VMIDSEL_MASK,
WM8955_VREF |
0x3 << WM8955_VREF_SHIFT);
/* Let VMID ramp */
msleep(500);
/* High resistance VROI to maintain outputs */
snd_soc_update_bits(codec,
WM8955_ADDITIONAL_CONTROL_3,
WM8955_VROI, WM8955_VROI);
}
/* Maintain VMID with 2*250k */
snd_soc_update_bits(codec, WM8955_POWER_MANAGEMENT_1,
WM8955_VMIDSEL_MASK,
0x2 << WM8955_VMIDSEL_SHIFT);
/* Minimum bias current */
snd_soc_update_bits(codec, WM8955_ADDITIONAL_CONTROL_1,
WM8955_VSEL_MASK, 0);
break;
case SND_SOC_BIAS_OFF:
/* Low resistance VROI to help discharge */
snd_soc_update_bits(codec,
WM8955_ADDITIONAL_CONTROL_3,
WM8955_VROI, 0);
/* Turn off VMID and VREF */
snd_soc_update_bits(codec, WM8955_POWER_MANAGEMENT_1,
WM8955_VREF |
WM8955_VMIDSEL_MASK, 0);
regulator_bulk_disable(ARRAY_SIZE(wm8955->supplies),
wm8955->supplies);
break;
}
codec->dapm.bias_level = level;
return 0;
}
#define WM8955_RATES SNDRV_PCM_RATE_8000_96000
#define WM8955_FORMATS (SNDRV_PCM_FMTBIT_S16_LE | SNDRV_PCM_FMTBIT_S20_3LE |\
SNDRV_PCM_FMTBIT_S24_LE | SNDRV_PCM_FMTBIT_S32_LE)
static const struct snd_soc_dai_ops wm8955_dai_ops = {
.set_sysclk = wm8955_set_sysclk,
.set_fmt = wm8955_set_fmt,
.hw_params = wm8955_hw_params,
.digital_mute = wm8955_digital_mute,
};
static struct snd_soc_dai_driver wm8955_dai = {
.name = "wm8955-hifi",
.playback = {
.stream_name = "Playback",
.channels_min = 2,
.channels_max = 2,
.rates = WM8955_RATES,
.formats = WM8955_FORMATS,
},
.ops = &wm8955_dai_ops,
};
#ifdef CONFIG_PM
static int wm8955_suspend(struct snd_soc_codec *codec)
{
wm8955_set_bias_level(codec, SND_SOC_BIAS_OFF);
return 0;
}
static int wm8955_resume(struct snd_soc_codec *codec)
{
wm8955_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
return 0;
}
#else
#define wm8955_suspend NULL
#define wm8955_resume NULL
#endif
static int wm8955_probe(struct snd_soc_codec *codec)
{
struct wm8955_priv *wm8955 = snd_soc_codec_get_drvdata(codec);
struct wm8955_pdata *pdata = dev_get_platdata(codec->dev);
u16 *reg_cache = codec->reg_cache;
int ret, i;
ret = snd_soc_codec_set_cache_io(codec, 7, 9, wm8955->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(wm8955->supplies); i++)
wm8955->supplies[i].supply = wm8955_supply_names[i];
ret = regulator_bulk_get(codec->dev, ARRAY_SIZE(wm8955->supplies),
wm8955->supplies);
if (ret != 0) {
dev_err(codec->dev, "Failed to request supplies: %d\n", ret);
return ret;
}
ret = regulator_bulk_enable(ARRAY_SIZE(wm8955->supplies),
wm8955->supplies);
if (ret != 0) {
dev_err(codec->dev, "Failed to enable supplies: %d\n", ret);
goto err_get;
}
ret = wm8955_reset(codec);
if (ret < 0) {
dev_err(codec->dev, "Failed to issue reset: %d\n", ret);
goto err_enable;
}
/* Change some default settings - latch VU and enable ZC */
snd_soc_update_bits(codec, WM8955_LEFT_DAC_VOLUME,
WM8955_LDVU, WM8955_LDVU);
snd_soc_update_bits(codec, WM8955_RIGHT_DAC_VOLUME,
WM8955_RDVU, WM8955_RDVU);
snd_soc_update_bits(codec, WM8955_LOUT1_VOLUME,
WM8955_LO1VU | WM8955_LO1ZC,
WM8955_LO1VU | WM8955_LO1ZC);
snd_soc_update_bits(codec, WM8955_ROUT1_VOLUME,
WM8955_RO1VU | WM8955_RO1ZC,
WM8955_RO1VU | WM8955_RO1ZC);
snd_soc_update_bits(codec, WM8955_LOUT2_VOLUME,
WM8955_LO2VU | WM8955_LO2ZC,
WM8955_LO2VU | WM8955_LO2ZC);
snd_soc_update_bits(codec, WM8955_ROUT2_VOLUME,
WM8955_RO2VU | WM8955_RO2ZC,
WM8955_RO2VU | WM8955_RO2ZC);
snd_soc_update_bits(codec, WM8955_MONOOUT_VOLUME,
WM8955_MOZC, WM8955_MOZC);
/* Also enable adaptive bass boost by default */
snd_soc_update_bits(codec, WM8955_BASS_CONTROL, WM8955_BB, WM8955_BB);
/* Set platform data values */
if (pdata) {
if (pdata->out2_speaker)
reg_cache[WM8955_ADDITIONAL_CONTROL_2]
|= WM8955_ROUT2INV;
if (pdata->monoin_diff)
reg_cache[WM8955_MONO_OUT_MIX_1]
|= WM8955_DMEN;
}
wm8955_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
/* Bias level configuration will have done an extra enable */
regulator_bulk_disable(ARRAY_SIZE(wm8955->supplies), wm8955->supplies);
wm8955_add_widgets(codec);
return 0;
err_enable:
regulator_bulk_disable(ARRAY_SIZE(wm8955->supplies), wm8955->supplies);
err_get:
regulator_bulk_free(ARRAY_SIZE(wm8955->supplies), wm8955->supplies);
return ret;
}
static int wm8955_remove(struct snd_soc_codec *codec)
{
struct wm8955_priv *wm8955 = snd_soc_codec_get_drvdata(codec);
wm8955_set_bias_level(codec, SND_SOC_BIAS_OFF);
regulator_bulk_free(ARRAY_SIZE(wm8955->supplies), wm8955->supplies);
return 0;
}
static struct snd_soc_codec_driver soc_codec_dev_wm8955 = {
.probe = wm8955_probe,
.remove = wm8955_remove,
.suspend = wm8955_suspend,
.resume = wm8955_resume,
.set_bias_level = wm8955_set_bias_level,
.reg_cache_size = ARRAY_SIZE(wm8955_reg),
.reg_word_size = sizeof(u16),
.reg_cache_default = wm8955_reg,
};
static __devinit int wm8955_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct wm8955_priv *wm8955;
int ret;
wm8955 = devm_kzalloc(&i2c->dev, sizeof(struct wm8955_priv),
GFP_KERNEL);
if (wm8955 == NULL)
return -ENOMEM;
i2c_set_clientdata(i2c, wm8955);
wm8955->control_type = SND_SOC_I2C;
ret = snd_soc_register_codec(&i2c->dev,
&soc_codec_dev_wm8955, &wm8955_dai, 1);
return ret;
}
static __devexit int wm8955_i2c_remove(struct i2c_client *client)
{
snd_soc_unregister_codec(&client->dev);
return 0;
}
static const struct i2c_device_id wm8955_i2c_id[] = {
{ "wm8955", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, wm8955_i2c_id);
static struct i2c_driver wm8955_i2c_driver = {
.driver = {
.name = "wm8955",
.owner = THIS_MODULE,
},
.probe = wm8955_i2c_probe,
.remove = __devexit_p(wm8955_i2c_remove),
.id_table = wm8955_i2c_id,
};
static int __init wm8955_modinit(void)
{
int ret = 0;
ret = i2c_add_driver(&wm8955_i2c_driver);
if (ret != 0) {
printk(KERN_ERR "Failed to register WM8955 I2C driver: %d\n",
ret);
}
return ret;
}
module_init(wm8955_modinit);
static void __exit wm8955_exit(void)
{
i2c_del_driver(&wm8955_i2c_driver);
}
module_exit(wm8955_exit);
MODULE_DESCRIPTION("ASoC WM8955 driver");
MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
MODULE_LICENSE("GPL");
