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android_kernel_samsung_msm8976/sound/soc/codecs/wm8993.c
Liam Girdwood 022658beab ASoC: core: Add support for DAI and machine kcontrols. 
Currently ASoC can only add kcontrols using codec and platform component device
handles. It's also desirable to add kcontrols for DAIs (i.e. McBSP) and for
SoC card machine drivers too. This allows the kcontrol to have a direct handle to
the parent ASoC component DAI/SoC Card/Platform/Codec device and hence easily
get it's private data.

This change makes snd_soc_add_controls() static and wraps it in the folowing
calls (card and dai are new) :-

snd_soc_add_card_controls()
snd_soc_add_codec_controls()
snd_soc_add_dai_controls()
snd_soc_add_platform_controls()

This patch also does a lot of small mechanical changes in individual codec drivers
to replace snd_soc_add_controls() with snd_soc_add_codec_controls().

It also updates the McBSP DAI driver to use snd_soc_add_dai_controls().

Finally, it updates the existing machine drivers that register controls to either :-

1) Use snd_soc_add_card_controls() where no direct codec control is required.
2) Use snd_soc_add_codec_controls() where there is direct codec control.

In the case of 1) above we also update the machine drivers to get the correct
component data pointers from the kcontrol (rather than getting the machine pointer
via the codec pointer).

Signed-off-by: Liam Girdwood <lrg@ti.com>
Signed-off-by: Mark Brown <broonie@opensource.wolfsonmicro.com>
2012-02-04 12:40:11 +00:00

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/*
* wm8993.c -- WM8993 ALSA SoC audio driver
*
* Copyright 2009, 2010 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/regmap.h>
#include <linux/regulator/consumer.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/tlv.h>
#include <sound/soc.h>
#include <sound/initval.h>
#include <sound/wm8993.h>
#include "wm8993.h"
#include "wm_hubs.h"
#define WM8993_NUM_SUPPLIES 6
static const char *wm8993_supply_names[WM8993_NUM_SUPPLIES] = {
"DCVDD",
"DBVDD",
"AVDD1",
"AVDD2",
"CPVDD",
"SPKVDD",
};
static struct reg_default wm8993_reg_defaults[] = {
{ 1, 0x0000 }, /* R1 - Power Management (1) */
{ 2, 0x6000 }, /* R2 - Power Management (2) */
{ 3, 0x0000 }, /* R3 - Power Management (3) */
{ 4, 0x4050 }, /* R4 - Audio Interface (1) */
{ 5, 0x4000 }, /* R5 - Audio Interface (2) */
{ 6, 0x01C8 }, /* R6 - Clocking 1 */
{ 7, 0x0000 }, /* R7 - Clocking 2 */
{ 8, 0x0000 }, /* R8 - Audio Interface (3) */
{ 9, 0x0040 }, /* R9 - Audio Interface (4) */
{ 10, 0x0004 }, /* R10 - DAC CTRL */
{ 11, 0x00C0 }, /* R11 - Left DAC Digital Volume */
{ 12, 0x00C0 }, /* R12 - Right DAC Digital Volume */
{ 13, 0x0000 }, /* R13 - Digital Side Tone */
{ 14, 0x0300 }, /* R14 - ADC CTRL */
{ 15, 0x00C0 }, /* R15 - Left ADC Digital Volume */
{ 16, 0x00C0 }, /* R16 - Right ADC Digital Volume */
{ 18, 0x0000 }, /* R18 - GPIO CTRL 1 */
{ 19, 0x0010 }, /* R19 - GPIO1 */
{ 20, 0x0000 }, /* R20 - IRQ_DEBOUNCE */
{ 21, 0x8000 }, /* R22 - GPIOCTRL 2 */
{ 22, 0x0800 }, /* R23 - GPIO_POL */
{ 24, 0x008B }, /* R24 - Left Line Input 1&2 Volume */
{ 25, 0x008B }, /* R25 - Left Line Input 3&4 Volume */
{ 26, 0x008B }, /* R26 - Right Line Input 1&2 Volume */
{ 27, 0x008B }, /* R27 - Right Line Input 3&4 Volume */
{ 28, 0x006D }, /* R28 - Left Output Volume */
{ 29, 0x006D }, /* R29 - Right Output Volume */
{ 30, 0x0066 }, /* R30 - Line Outputs Volume */
{ 31, 0x0020 }, /* R31 - HPOUT2 Volume */
{ 32, 0x0079 }, /* R32 - Left OPGA Volume */
{ 33, 0x0079 }, /* R33 - Right OPGA Volume */
{ 34, 0x0003 }, /* R34 - SPKMIXL Attenuation */
{ 35, 0x0003 }, /* R35 - SPKMIXR Attenuation */
{ 36, 0x0011 }, /* R36 - SPKOUT Mixers */
{ 37, 0x0100 }, /* R37 - SPKOUT Boost */
{ 38, 0x0079 }, /* R38 - Speaker Volume Left */
{ 39, 0x0079 }, /* R39 - Speaker Volume Right */
{ 40, 0x0000 }, /* R40 - Input Mixer2 */
{ 41, 0x0000 }, /* R41 - Input Mixer3 */
{ 42, 0x0000 }, /* R42 - Input Mixer4 */
{ 43, 0x0000 }, /* R43 - Input Mixer5 */
{ 44, 0x0000 }, /* R44 - Input Mixer6 */
{ 45, 0x0000 }, /* R45 - Output Mixer1 */
{ 46, 0x0000 }, /* R46 - Output Mixer2 */
{ 47, 0x0000 }, /* R47 - Output Mixer3 */
{ 48, 0x0000 }, /* R48 - Output Mixer4 */
{ 49, 0x0000 }, /* R49 - Output Mixer5 */
{ 50, 0x0000 }, /* R50 - Output Mixer6 */
{ 51, 0x0000 }, /* R51 - HPOUT2 Mixer */
{ 52, 0x0000 }, /* R52 - Line Mixer1 */
{ 53, 0x0000 }, /* R53 - Line Mixer2 */
{ 54, 0x0000 }, /* R54 - Speaker Mixer */
{ 55, 0x0000 }, /* R55 - Additional Control */
{ 56, 0x0000 }, /* R56 - AntiPOP1 */
{ 57, 0x0000 }, /* R57 - AntiPOP2 */
{ 58, 0x0000 }, /* R58 - MICBIAS */
{ 60, 0x0000 }, /* R60 - FLL Control 1 */
{ 61, 0x0000 }, /* R61 - FLL Control 2 */
{ 62, 0x0000 }, /* R62 - FLL Control 3 */
{ 63, 0x2EE0 }, /* R63 - FLL Control 4 */
{ 64, 0x0002 }, /* R64 - FLL Control 5 */
{ 65, 0x2287 }, /* R65 - Clocking 3 */
{ 66, 0x025F }, /* R66 - Clocking 4 */
{ 67, 0x0000 }, /* R67 - MW Slave Control */
{ 69, 0x0002 }, /* R69 - Bus Control 1 */
{ 70, 0x0000 }, /* R70 - Write Sequencer 0 */
{ 71, 0x0000 }, /* R71 - Write Sequencer 1 */
{ 72, 0x0000 }, /* R72 - Write Sequencer 2 */
{ 73, 0x0000 }, /* R73 - Write Sequencer 3 */
{ 74, 0x0000 }, /* R74 - Write Sequencer 4 */
{ 75, 0x0000 }, /* R75 - Write Sequencer 5 */
{ 76, 0x1F25 }, /* R76 - Charge Pump 1 */
{ 81, 0x0000 }, /* R81 - Class W 0 */
{ 85, 0x054A }, /* R85 - DC Servo 1 */
{ 87, 0x0000 }, /* R87 - DC Servo 3 */
{ 96, 0x0100 }, /* R96 - Analogue HP 0 */
{ 98, 0x0000 }, /* R98 - EQ1 */
{ 99, 0x000C }, /* R99 - EQ2 */
{ 100, 0x000C }, /* R100 - EQ3 */
{ 101, 0x000C }, /* R101 - EQ4 */
{ 102, 0x000C }, /* R102 - EQ5 */
{ 103, 0x000C }, /* R103 - EQ6 */
{ 104, 0x0FCA }, /* R104 - EQ7 */
{ 105, 0x0400 }, /* R105 - EQ8 */
{ 106, 0x00D8 }, /* R106 - EQ9 */
{ 107, 0x1EB5 }, /* R107 - EQ10 */
{ 108, 0xF145 }, /* R108 - EQ11 */
{ 109, 0x0B75 }, /* R109 - EQ12 */
{ 110, 0x01C5 }, /* R110 - EQ13 */
{ 111, 0x1C58 }, /* R111 - EQ14 */
{ 112, 0xF373 }, /* R112 - EQ15 */
{ 113, 0x0A54 }, /* R113 - EQ16 */
{ 114, 0x0558 }, /* R114 - EQ17 */
{ 115, 0x168E }, /* R115 - EQ18 */
{ 116, 0xF829 }, /* R116 - EQ19 */
{ 117, 0x07AD }, /* R117 - EQ20 */
{ 118, 0x1103 }, /* R118 - EQ21 */
{ 119, 0x0564 }, /* R119 - EQ22 */
{ 120, 0x0559 }, /* R120 - EQ23 */
{ 121, 0x4000 }, /* R121 - EQ24 */
{ 122, 0x0000 }, /* R122 - Digital Pulls */
{ 123, 0x0F08 }, /* R123 - DRC Control 1 */
{ 124, 0x0000 }, /* R124 - DRC Control 2 */
{ 125, 0x0080 }, /* R125 - DRC Control 3 */
{ 126, 0x0000 }, /* R126 - DRC Control 4 */
};
static struct {
int ratio;
int clk_sys_rate;
} clk_sys_rates[] = {
{ 64, 0 },
{ 128, 1 },
{ 192, 2 },
{ 256, 3 },
{ 384, 4 },
{ 512, 5 },
{ 768, 6 },
{ 1024, 7 },
{ 1408, 8 },
{ 1536, 9 },
};
static struct {
int rate;
int sample_rate;
} sample_rates[] = {
{ 8000, 0 },
{ 11025, 1 },
{ 12000, 1 },
{ 16000, 2 },
{ 22050, 3 },
{ 24000, 3 },
{ 32000, 4 },
{ 44100, 5 },
{ 48000, 5 },
};
static struct {
int div; /* *10 due to .5s */
int bclk_div;
} bclk_divs[] = {
{ 10, 0 },
{ 15, 1 },
{ 20, 2 },
{ 30, 3 },
{ 40, 4 },
{ 55, 5 },
{ 60, 6 },
{ 80, 7 },
{ 110, 8 },
{ 120, 9 },
{ 160, 10 },
{ 220, 11 },
{ 240, 12 },
{ 320, 13 },
{ 440, 14 },
{ 480, 15 },
};
struct wm8993_priv {
struct wm_hubs_data hubs_data;
struct device *dev;
struct regmap *regmap;
struct regulator_bulk_data supplies[WM8993_NUM_SUPPLIES];
struct wm8993_platform_data pdata;
struct completion fll_lock;
int master;
int sysclk_source;
int tdm_slots;
int tdm_width;
unsigned int mclk_rate;
unsigned int sysclk_rate;
unsigned int fs;
unsigned int bclk;
int class_w_users;
unsigned int fll_fref;
unsigned int fll_fout;
int fll_src;
};
static bool wm8993_volatile(struct device *dev, unsigned int reg)
{
switch (reg) {
case WM8993_SOFTWARE_RESET:
case WM8993_GPIO_CTRL_1:
case WM8993_DC_SERVO_0:
case WM8993_DC_SERVO_READBACK_0:
case WM8993_DC_SERVO_READBACK_1:
case WM8993_DC_SERVO_READBACK_2:
return true;
default:
return false;
}
}
static bool wm8993_readable(struct device *dev, unsigned int reg)
{
switch (reg) {
case WM8993_SOFTWARE_RESET:
case WM8993_POWER_MANAGEMENT_1:
case WM8993_POWER_MANAGEMENT_2:
case WM8993_POWER_MANAGEMENT_3:
case WM8993_AUDIO_INTERFACE_1:
case WM8993_AUDIO_INTERFACE_2:
case WM8993_CLOCKING_1:
case WM8993_CLOCKING_2:
case WM8993_AUDIO_INTERFACE_3:
case WM8993_AUDIO_INTERFACE_4:
case WM8993_DAC_CTRL:
case WM8993_LEFT_DAC_DIGITAL_VOLUME:
case WM8993_RIGHT_DAC_DIGITAL_VOLUME:
case WM8993_DIGITAL_SIDE_TONE:
case WM8993_ADC_CTRL:
case WM8993_LEFT_ADC_DIGITAL_VOLUME:
case WM8993_RIGHT_ADC_DIGITAL_VOLUME:
case WM8993_GPIO_CTRL_1:
case WM8993_GPIO1:
case WM8993_IRQ_DEBOUNCE:
case WM8993_GPIOCTRL_2:
case WM8993_GPIO_POL:
case WM8993_LEFT_LINE_INPUT_1_2_VOLUME:
case WM8993_LEFT_LINE_INPUT_3_4_VOLUME:
case WM8993_RIGHT_LINE_INPUT_1_2_VOLUME:
case WM8993_RIGHT_LINE_INPUT_3_4_VOLUME:
case WM8993_LEFT_OUTPUT_VOLUME:
case WM8993_RIGHT_OUTPUT_VOLUME:
case WM8993_LINE_OUTPUTS_VOLUME:
case WM8993_HPOUT2_VOLUME:
case WM8993_LEFT_OPGA_VOLUME:
case WM8993_RIGHT_OPGA_VOLUME:
case WM8993_SPKMIXL_ATTENUATION:
case WM8993_SPKMIXR_ATTENUATION:
case WM8993_SPKOUT_MIXERS:
case WM8993_SPKOUT_BOOST:
case WM8993_SPEAKER_VOLUME_LEFT:
case WM8993_SPEAKER_VOLUME_RIGHT:
case WM8993_INPUT_MIXER2:
case WM8993_INPUT_MIXER3:
case WM8993_INPUT_MIXER4:
case WM8993_INPUT_MIXER5:
case WM8993_INPUT_MIXER6:
case WM8993_OUTPUT_MIXER1:
case WM8993_OUTPUT_MIXER2:
case WM8993_OUTPUT_MIXER3:
case WM8993_OUTPUT_MIXER4:
case WM8993_OUTPUT_MIXER5:
case WM8993_OUTPUT_MIXER6:
case WM8993_HPOUT2_MIXER:
case WM8993_LINE_MIXER1:
case WM8993_LINE_MIXER2:
case WM8993_SPEAKER_MIXER:
case WM8993_ADDITIONAL_CONTROL:
case WM8993_ANTIPOP1:
case WM8993_ANTIPOP2:
case WM8993_MICBIAS:
case WM8993_FLL_CONTROL_1:
case WM8993_FLL_CONTROL_2:
case WM8993_FLL_CONTROL_3:
case WM8993_FLL_CONTROL_4:
case WM8993_FLL_CONTROL_5:
case WM8993_CLOCKING_3:
case WM8993_CLOCKING_4:
case WM8993_MW_SLAVE_CONTROL:
case WM8993_BUS_CONTROL_1:
case WM8993_WRITE_SEQUENCER_0:
case WM8993_WRITE_SEQUENCER_1:
case WM8993_WRITE_SEQUENCER_2:
case WM8993_WRITE_SEQUENCER_3:
case WM8993_WRITE_SEQUENCER_4:
case WM8993_WRITE_SEQUENCER_5:
case WM8993_CHARGE_PUMP_1:
case WM8993_CLASS_W_0:
case WM8993_DC_SERVO_0:
case WM8993_DC_SERVO_1:
case WM8993_DC_SERVO_3:
case WM8993_DC_SERVO_READBACK_0:
case WM8993_DC_SERVO_READBACK_1:
case WM8993_DC_SERVO_READBACK_2:
case WM8993_ANALOGUE_HP_0:
case WM8993_EQ1:
case WM8993_EQ2:
case WM8993_EQ3:
case WM8993_EQ4:
case WM8993_EQ5:
case WM8993_EQ6:
case WM8993_EQ7:
case WM8993_EQ8:
case WM8993_EQ9:
case WM8993_EQ10:
case WM8993_EQ11:
case WM8993_EQ12:
case WM8993_EQ13:
case WM8993_EQ14:
case WM8993_EQ15:
case WM8993_EQ16:
case WM8993_EQ17:
case WM8993_EQ18:
case WM8993_EQ19:
case WM8993_EQ20:
case WM8993_EQ21:
case WM8993_EQ22:
case WM8993_EQ23:
case WM8993_EQ24:
case WM8993_DIGITAL_PULLS:
case WM8993_DRC_CONTROL_1:
case WM8993_DRC_CONTROL_2:
case WM8993_DRC_CONTROL_3:
case WM8993_DRC_CONTROL_4:
return true;
default:
return false;
}
}
struct _fll_div {
u16 fll_fratio;
u16 fll_outdiv;
u16 fll_clk_ref_div;
u16 n;
u16 k;
};
/* The size in bits of the FLL divide multiplied by 10
* to allow rounding later */
#define FIXED_FLL_SIZE ((1 << 16) * 10)
static struct {
unsigned int min;
unsigned int max;
u16 fll_fratio;
int ratio;
} fll_fratios[] = {
{ 0, 64000, 4, 16 },
{ 64000, 128000, 3, 8 },
{ 128000, 256000, 2, 4 },
{ 256000, 1000000, 1, 2 },
{ 1000000, 13500000, 0, 1 },
};
static int fll_factors(struct _fll_div *fll_div, unsigned int Fref,
unsigned int Fout)
{
u64 Kpart;
unsigned int K, Ndiv, Nmod, target;
unsigned int div;
int i;
/* Fref must be <=13.5MHz */
div = 1;
fll_div->fll_clk_ref_div = 0;
while ((Fref / div) > 13500000) {
div *= 2;
fll_div->fll_clk_ref_div++;
if (div > 8) {
pr_err("Can't scale %dMHz input down to <=13.5MHz\n",
Fref);
return -EINVAL;
}
}
pr_debug("Fref=%u Fout=%u\n", Fref, Fout);
/* Apply the division for our remaining calculations */
Fref /= div;
/* Fvco should be 90-100MHz; don't check the upper bound */
div = 0;
target = Fout * 2;
while (target < 90000000) {
div++;
target *= 2;
if (div > 7) {
pr_err("Unable to find FLL_OUTDIV for Fout=%uHz\n",
Fout);
return -EINVAL;
}
}
fll_div->fll_outdiv = div;
pr_debug("Fvco=%dHz\n", target);
/* Find an appropriate FLL_FRATIO and factor it out of the target */
for (i = 0; i < ARRAY_SIZE(fll_fratios); i++) {
if (fll_fratios[i].min <= Fref && Fref <= fll_fratios[i].max) {
fll_div->fll_fratio = fll_fratios[i].fll_fratio;
target /= fll_fratios[i].ratio;
break;
}
}
if (i == ARRAY_SIZE(fll_fratios)) {
pr_err("Unable to find FLL_FRATIO for Fref=%uHz\n", Fref);
return -EINVAL;
}
/* Now, calculate N.K */
Ndiv = target / Fref;
fll_div->n = Ndiv;
Nmod = target % Fref;
pr_debug("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 */
fll_div->k = K / 10;
pr_debug("N=%x K=%x FLL_FRATIO=%x FLL_OUTDIV=%x FLL_CLK_REF_DIV=%x\n",
fll_div->n, fll_div->k,
fll_div->fll_fratio, fll_div->fll_outdiv,
fll_div->fll_clk_ref_div);
return 0;
}
static int _wm8993_set_fll(struct snd_soc_codec *codec, int fll_id, int source,
unsigned int Fref, unsigned int Fout)
{
struct wm8993_priv *wm8993 = snd_soc_codec_get_drvdata(codec);
struct i2c_client *i2c = to_i2c_client(codec->dev);
u16 reg1, reg4, reg5;
struct _fll_div fll_div;
unsigned int timeout;
int ret;
/* Any change? */
if (Fref == wm8993->fll_fref && Fout == wm8993->fll_fout)
return 0;
/* Disable the FLL */
if (Fout == 0) {
dev_dbg(codec->dev, "FLL disabled\n");
wm8993->fll_fref = 0;
wm8993->fll_fout = 0;
reg1 = snd_soc_read(codec, WM8993_FLL_CONTROL_1);
reg1 &= ~WM8993_FLL_ENA;
snd_soc_write(codec, WM8993_FLL_CONTROL_1, reg1);
return 0;
}
ret = fll_factors(&fll_div, Fref, Fout);
if (ret != 0)
return ret;
reg5 = snd_soc_read(codec, WM8993_FLL_CONTROL_5);
reg5 &= ~WM8993_FLL_CLK_SRC_MASK;
switch (fll_id) {
case WM8993_FLL_MCLK:
break;
case WM8993_FLL_LRCLK:
reg5 |= 1;
break;
case WM8993_FLL_BCLK:
reg5 |= 2;
break;
default:
dev_err(codec->dev, "Unknown FLL ID %d\n", fll_id);
return -EINVAL;
}
/* Any FLL configuration change requires that the FLL be
* disabled first. */
reg1 = snd_soc_read(codec, WM8993_FLL_CONTROL_1);
reg1 &= ~WM8993_FLL_ENA;
snd_soc_write(codec, WM8993_FLL_CONTROL_1, reg1);
/* Apply the configuration */
if (fll_div.k)
reg1 |= WM8993_FLL_FRAC_MASK;
else
reg1 &= ~WM8993_FLL_FRAC_MASK;
snd_soc_write(codec, WM8993_FLL_CONTROL_1, reg1);
snd_soc_write(codec, WM8993_FLL_CONTROL_2,
(fll_div.fll_outdiv << WM8993_FLL_OUTDIV_SHIFT) |
(fll_div.fll_fratio << WM8993_FLL_FRATIO_SHIFT));
snd_soc_write(codec, WM8993_FLL_CONTROL_3, fll_div.k);
reg4 = snd_soc_read(codec, WM8993_FLL_CONTROL_4);
reg4 &= ~WM8993_FLL_N_MASK;
reg4 |= fll_div.n << WM8993_FLL_N_SHIFT;
snd_soc_write(codec, WM8993_FLL_CONTROL_4, reg4);
reg5 &= ~WM8993_FLL_CLK_REF_DIV_MASK;
reg5 |= fll_div.fll_clk_ref_div << WM8993_FLL_CLK_REF_DIV_SHIFT;
snd_soc_write(codec, WM8993_FLL_CONTROL_5, reg5);
/* If we've got an interrupt wired up make sure we get it */
if (i2c->irq)
timeout = msecs_to_jiffies(20);
else if (Fref < 1000000)
timeout = msecs_to_jiffies(3);
else
timeout = msecs_to_jiffies(1);
try_wait_for_completion(&wm8993->fll_lock);
/* Enable the FLL */
snd_soc_write(codec, WM8993_FLL_CONTROL_1, reg1 | WM8993_FLL_ENA);
timeout = wait_for_completion_timeout(&wm8993->fll_lock, timeout);
if (i2c->irq && !timeout)
dev_warn(codec->dev, "Timed out waiting for FLL\n");
dev_dbg(codec->dev, "FLL enabled at %dHz->%dHz\n", Fref, Fout);
wm8993->fll_fref = Fref;
wm8993->fll_fout = Fout;
wm8993->fll_src = source;
return 0;
}
static int wm8993_set_fll(struct snd_soc_dai *dai, int fll_id, int source,
unsigned int Fref, unsigned int Fout)
{
return _wm8993_set_fll(dai->codec, fll_id, source, Fref, Fout);
}
static int configure_clock(struct snd_soc_codec *codec)
{
struct wm8993_priv *wm8993 = snd_soc_codec_get_drvdata(codec);
unsigned int reg;
/* This should be done on init() for bypass paths */
switch (wm8993->sysclk_source) {
case WM8993_SYSCLK_MCLK:
dev_dbg(codec->dev, "Using %dHz MCLK\n", wm8993->mclk_rate);
reg = snd_soc_read(codec, WM8993_CLOCKING_2);
reg &= ~(WM8993_MCLK_DIV | WM8993_SYSCLK_SRC);
if (wm8993->mclk_rate > 13500000) {
reg |= WM8993_MCLK_DIV;
wm8993->sysclk_rate = wm8993->mclk_rate / 2;
} else {
reg &= ~WM8993_MCLK_DIV;
wm8993->sysclk_rate = wm8993->mclk_rate;
}
snd_soc_write(codec, WM8993_CLOCKING_2, reg);
break;
case WM8993_SYSCLK_FLL:
dev_dbg(codec->dev, "Using %dHz FLL clock\n",
wm8993->fll_fout);
reg = snd_soc_read(codec, WM8993_CLOCKING_2);
reg |= WM8993_SYSCLK_SRC;
if (wm8993->fll_fout > 13500000) {
reg |= WM8993_MCLK_DIV;
wm8993->sysclk_rate = wm8993->fll_fout / 2;
} else {
reg &= ~WM8993_MCLK_DIV;
wm8993->sysclk_rate = wm8993->fll_fout;
}
snd_soc_write(codec, WM8993_CLOCKING_2, reg);
break;
default:
dev_err(codec->dev, "System clock not configured\n");
return -EINVAL;
}
dev_dbg(codec->dev, "CLK_SYS is %dHz\n", wm8993->sysclk_rate);
return 0;
}
static const DECLARE_TLV_DB_SCALE(sidetone_tlv, -3600, 300, 0);
static const DECLARE_TLV_DB_SCALE(drc_comp_threash, -4500, 75, 0);
static const DECLARE_TLV_DB_SCALE(drc_comp_amp, -2250, 75, 0);
static const DECLARE_TLV_DB_SCALE(drc_min_tlv, -1800, 600, 0);
static const unsigned int drc_max_tlv[] = {
TLV_DB_RANGE_HEAD(2),
0, 2, TLV_DB_SCALE_ITEM(1200, 600, 0),
3, 3, TLV_DB_SCALE_ITEM(3600, 0, 0),
};
static const DECLARE_TLV_DB_SCALE(drc_qr_tlv, 1200, 600, 0);
static const DECLARE_TLV_DB_SCALE(drc_startup_tlv, -1800, 300, 0);
static const DECLARE_TLV_DB_SCALE(eq_tlv, -1200, 100, 0);
static const DECLARE_TLV_DB_SCALE(digital_tlv, -7200, 75, 1);
static const DECLARE_TLV_DB_SCALE(dac_boost_tlv, 0, 600, 0);
static const char *dac_deemph_text[] = {
"None",
"32kHz",
"44.1kHz",
"48kHz",
};
static const struct soc_enum dac_deemph =
SOC_ENUM_SINGLE(WM8993_DAC_CTRL, 4, 4, dac_deemph_text);
static const char *adc_hpf_text[] = {
"Hi-Fi",
"Voice 1",
"Voice 2",
"Voice 3",
};
static const struct soc_enum adc_hpf =
SOC_ENUM_SINGLE(WM8993_ADC_CTRL, 5, 4, adc_hpf_text);
static const char *drc_path_text[] = {
"ADC",
"DAC"
};
static const struct soc_enum drc_path =
SOC_ENUM_SINGLE(WM8993_DRC_CONTROL_1, 14, 2, drc_path_text);
static const char *drc_r0_text[] = {
"1",
"1/2",
"1/4",
"1/8",
"1/16",
"0",
};
static const struct soc_enum drc_r0 =
SOC_ENUM_SINGLE(WM8993_DRC_CONTROL_3, 8, 6, drc_r0_text);
static const char *drc_r1_text[] = {
"1",
"1/2",
"1/4",
"1/8",
"0",
};
static const struct soc_enum drc_r1 =
SOC_ENUM_SINGLE(WM8993_DRC_CONTROL_4, 13, 5, drc_r1_text);
static const char *drc_attack_text[] = {
"Reserved",
"181us",
"363us",
"726us",
"1.45ms",
"2.9ms",
"5.8ms",
"11.6ms",
"23.2ms",
"46.4ms",
"92.8ms",
"185.6ms",
};
static const struct soc_enum drc_attack =
SOC_ENUM_SINGLE(WM8993_DRC_CONTROL_2, 12, 12, drc_attack_text);
static const char *drc_decay_text[] = {
"186ms",
"372ms",
"743ms",
"1.49s",
"2.97ms",
"5.94ms",
"11.89ms",
"23.78ms",
"47.56ms",
};
static const struct soc_enum drc_decay =
SOC_ENUM_SINGLE(WM8993_DRC_CONTROL_2, 8, 9, drc_decay_text);
static const char *drc_ff_text[] = {
"5 samples",
"9 samples",
};
static const struct soc_enum drc_ff =
SOC_ENUM_SINGLE(WM8993_DRC_CONTROL_3, 7, 2, drc_ff_text);
static const char *drc_qr_rate_text[] = {
"0.725ms",
"1.45ms",
"5.8ms",
};
static const struct soc_enum drc_qr_rate =
SOC_ENUM_SINGLE(WM8993_DRC_CONTROL_3, 0, 3, drc_qr_rate_text);
static const char *drc_smooth_text[] = {
"Low",
"Medium",
"High",
};
static const struct soc_enum drc_smooth =
SOC_ENUM_SINGLE(WM8993_DRC_CONTROL_1, 4, 3, drc_smooth_text);
static const struct snd_kcontrol_new wm8993_snd_controls[] = {
SOC_DOUBLE_TLV("Digital Sidetone Volume", WM8993_DIGITAL_SIDE_TONE,
5, 9, 12, 0, sidetone_tlv),
SOC_SINGLE("DRC Switch", WM8993_DRC_CONTROL_1, 15, 1, 0),
SOC_ENUM("DRC Path", drc_path),
SOC_SINGLE_TLV("DRC Compressor Threshold Volume", WM8993_DRC_CONTROL_2,
2, 60, 1, drc_comp_threash),
SOC_SINGLE_TLV("DRC Compressor Amplitude Volume", WM8993_DRC_CONTROL_3,
11, 30, 1, drc_comp_amp),
SOC_ENUM("DRC R0", drc_r0),
SOC_ENUM("DRC R1", drc_r1),
SOC_SINGLE_TLV("DRC Minimum Volume", WM8993_DRC_CONTROL_1, 2, 3, 1,
drc_min_tlv),
SOC_SINGLE_TLV("DRC Maximum Volume", WM8993_DRC_CONTROL_1, 0, 3, 0,
drc_max_tlv),
SOC_ENUM("DRC Attack Rate", drc_attack),
SOC_ENUM("DRC Decay Rate", drc_decay),
SOC_ENUM("DRC FF Delay", drc_ff),
SOC_SINGLE("DRC Anti-clip Switch", WM8993_DRC_CONTROL_1, 9, 1, 0),
SOC_SINGLE("DRC Quick Release Switch", WM8993_DRC_CONTROL_1, 10, 1, 0),
SOC_SINGLE_TLV("DRC Quick Release Volume", WM8993_DRC_CONTROL_3, 2, 3, 0,
drc_qr_tlv),
SOC_ENUM("DRC Quick Release Rate", drc_qr_rate),
SOC_SINGLE("DRC Smoothing Switch", WM8993_DRC_CONTROL_1, 11, 1, 0),
SOC_SINGLE("DRC Smoothing Hysteresis Switch", WM8993_DRC_CONTROL_1, 8, 1, 0),
SOC_ENUM("DRC Smoothing Hysteresis Threshold", drc_smooth),
SOC_SINGLE_TLV("DRC Startup Volume", WM8993_DRC_CONTROL_4, 8, 18, 0,
drc_startup_tlv),
SOC_SINGLE("EQ Switch", WM8993_EQ1, 0, 1, 0),
SOC_DOUBLE_R_TLV("Capture Volume", WM8993_LEFT_ADC_DIGITAL_VOLUME,
WM8993_RIGHT_ADC_DIGITAL_VOLUME, 1, 96, 0, digital_tlv),
SOC_SINGLE("ADC High Pass Filter Switch", WM8993_ADC_CTRL, 8, 1, 0),
SOC_ENUM("ADC High Pass Filter Mode", adc_hpf),
SOC_DOUBLE_R_TLV("Playback Volume", WM8993_LEFT_DAC_DIGITAL_VOLUME,
WM8993_RIGHT_DAC_DIGITAL_VOLUME, 1, 96, 0, digital_tlv),
SOC_SINGLE_TLV("Playback Boost Volume", WM8993_AUDIO_INTERFACE_2, 10, 3, 0,
dac_boost_tlv),
SOC_ENUM("DAC Deemphasis", dac_deemph),
SOC_SINGLE_TLV("SPKL DAC Volume", WM8993_SPKMIXL_ATTENUATION,
2, 1, 1, wm_hubs_spkmix_tlv),
SOC_SINGLE_TLV("SPKR DAC Volume", WM8993_SPKMIXR_ATTENUATION,
2, 1, 1, wm_hubs_spkmix_tlv),
};
static const struct snd_kcontrol_new wm8993_eq_controls[] = {
SOC_SINGLE_TLV("EQ1 Volume", WM8993_EQ2, 0, 24, 0, eq_tlv),
SOC_SINGLE_TLV("EQ2 Volume", WM8993_EQ3, 0, 24, 0, eq_tlv),
SOC_SINGLE_TLV("EQ3 Volume", WM8993_EQ4, 0, 24, 0, eq_tlv),
SOC_SINGLE_TLV("EQ4 Volume", WM8993_EQ5, 0, 24, 0, eq_tlv),
SOC_SINGLE_TLV("EQ5 Volume", WM8993_EQ6, 0, 24, 0, eq_tlv),
};
static int clk_sys_event(struct snd_soc_dapm_widget *w,
struct snd_kcontrol *kcontrol, int event)
{
struct snd_soc_codec *codec = w->codec;
switch (event) {
case SND_SOC_DAPM_PRE_PMU:
return configure_clock(codec);
case SND_SOC_DAPM_POST_PMD:
break;
}
return 0;
}
/*
* When used with DAC outputs only the WM8993 charge pump supports
* operation in class W mode, providing very low power consumption
* when used with digital sources. Enable and disable this mode
* automatically depending on the mixer configuration.
*
* Currently the only supported paths are the direct DAC->headphone
* paths (which provide minimum power consumption anyway).
*/
static int class_w_put(struct snd_kcontrol *kcontrol,
struct snd_ctl_elem_value *ucontrol)
{
struct snd_soc_dapm_widget_list *wlist = snd_kcontrol_chip(kcontrol);
struct snd_soc_dapm_widget *widget = wlist->widgets[0];
struct snd_soc_codec *codec = widget->codec;
struct wm8993_priv *wm8993 = snd_soc_codec_get_drvdata(codec);
int ret;
/* Turn it off if we're using the main output mixer */
if (ucontrol->value.integer.value[0] == 0) {
if (wm8993->class_w_users == 0) {
dev_dbg(codec->dev, "Disabling Class W\n");
snd_soc_update_bits(codec, WM8993_CLASS_W_0,
WM8993_CP_DYN_FREQ |
WM8993_CP_DYN_V,
0);
}
wm8993->class_w_users++;
wm8993->hubs_data.class_w = true;
}
/* Implement the change */
ret = snd_soc_dapm_put_enum_double(kcontrol, ucontrol);
/* Enable it if we're using the direct DAC path */
if (ucontrol->value.integer.value[0] == 1) {
if (wm8993->class_w_users == 1) {
dev_dbg(codec->dev, "Enabling Class W\n");
snd_soc_update_bits(codec, WM8993_CLASS_W_0,
WM8993_CP_DYN_FREQ |
WM8993_CP_DYN_V,
WM8993_CP_DYN_FREQ |
WM8993_CP_DYN_V);
}
wm8993->class_w_users--;
wm8993->hubs_data.class_w = false;
}
dev_dbg(codec->dev, "Indirect DAC use count now %d\n",
wm8993->class_w_users);
return ret;
}
#define SOC_DAPM_ENUM_W(xname, xenum) \
{ .iface = SNDRV_CTL_ELEM_IFACE_MIXER, .name = xname, \
.info = snd_soc_info_enum_double, \
.get = snd_soc_dapm_get_enum_double, \
.put = class_w_put, \
.private_value = (unsigned long)&xenum }
static const char *hp_mux_text[] = {
"Mixer",
"DAC",
};
static const struct soc_enum hpl_enum =
SOC_ENUM_SINGLE(WM8993_OUTPUT_MIXER1, 8, 2, hp_mux_text);
static const struct snd_kcontrol_new hpl_mux =
SOC_DAPM_ENUM_W("Left Headphone Mux", hpl_enum);
static const struct soc_enum hpr_enum =
SOC_ENUM_SINGLE(WM8993_OUTPUT_MIXER2, 8, 2, hp_mux_text);
static const struct snd_kcontrol_new hpr_mux =
SOC_DAPM_ENUM_W("Right Headphone Mux", hpr_enum);
static const struct snd_kcontrol_new left_speaker_mixer[] = {
SOC_DAPM_SINGLE("Input Switch", WM8993_SPEAKER_MIXER, 7, 1, 0),
SOC_DAPM_SINGLE("IN1LP Switch", WM8993_SPEAKER_MIXER, 5, 1, 0),
SOC_DAPM_SINGLE("Output Switch", WM8993_SPEAKER_MIXER, 3, 1, 0),
SOC_DAPM_SINGLE("DAC Switch", WM8993_SPEAKER_MIXER, 6, 1, 0),
};
static const struct snd_kcontrol_new right_speaker_mixer[] = {
SOC_DAPM_SINGLE("Input Switch", WM8993_SPEAKER_MIXER, 6, 1, 0),
SOC_DAPM_SINGLE("IN1RP Switch", WM8993_SPEAKER_MIXER, 4, 1, 0),
SOC_DAPM_SINGLE("Output Switch", WM8993_SPEAKER_MIXER, 2, 1, 0),
SOC_DAPM_SINGLE("DAC Switch", WM8993_SPEAKER_MIXER, 0, 1, 0),
};
static const char *aif_text[] = {
"Left", "Right"
};
static const struct soc_enum aifoutl_enum =
SOC_ENUM_SINGLE(WM8993_AUDIO_INTERFACE_1, 15, 2, aif_text);
static const struct snd_kcontrol_new aifoutl_mux =
SOC_DAPM_ENUM("AIFOUTL Mux", aifoutl_enum);
static const struct soc_enum aifoutr_enum =
SOC_ENUM_SINGLE(WM8993_AUDIO_INTERFACE_1, 14, 2, aif_text);
static const struct snd_kcontrol_new aifoutr_mux =
SOC_DAPM_ENUM("AIFOUTR Mux", aifoutr_enum);
static const struct soc_enum aifinl_enum =
SOC_ENUM_SINGLE(WM8993_AUDIO_INTERFACE_2, 15, 2, aif_text);
static const struct snd_kcontrol_new aifinl_mux =
SOC_DAPM_ENUM("AIFINL Mux", aifinl_enum);
static const struct soc_enum aifinr_enum =
SOC_ENUM_SINGLE(WM8993_AUDIO_INTERFACE_2, 14, 2, aif_text);
static const struct snd_kcontrol_new aifinr_mux =
SOC_DAPM_ENUM("AIFINR Mux", aifinr_enum);
static const char *sidetone_text[] = {
"None", "Left", "Right"
};
static const struct soc_enum sidetonel_enum =
SOC_ENUM_SINGLE(WM8993_DIGITAL_SIDE_TONE, 2, 3, sidetone_text);
static const struct snd_kcontrol_new sidetonel_mux =
SOC_DAPM_ENUM("Left Sidetone", sidetonel_enum);
static const struct soc_enum sidetoner_enum =
SOC_ENUM_SINGLE(WM8993_DIGITAL_SIDE_TONE, 0, 3, sidetone_text);
static const struct snd_kcontrol_new sidetoner_mux =
SOC_DAPM_ENUM("Right Sidetone", sidetoner_enum);
static const struct snd_soc_dapm_widget wm8993_dapm_widgets[] = {
SND_SOC_DAPM_SUPPLY("CLK_SYS", WM8993_BUS_CONTROL_1, 1, 0, clk_sys_event,
SND_SOC_DAPM_PRE_PMU | SND_SOC_DAPM_POST_PMD),
SND_SOC_DAPM_SUPPLY("TOCLK", WM8993_CLOCKING_1, 14, 0, NULL, 0),
SND_SOC_DAPM_SUPPLY("CLK_DSP", WM8993_CLOCKING_3, 0, 0, NULL, 0),
SND_SOC_DAPM_SUPPLY("VMID", SND_SOC_NOPM, 0, 0, NULL, 0),
SND_SOC_DAPM_ADC("ADCL", NULL, WM8993_POWER_MANAGEMENT_2, 1, 0),
SND_SOC_DAPM_ADC("ADCR", NULL, WM8993_POWER_MANAGEMENT_2, 0, 0),
SND_SOC_DAPM_MUX("AIFOUTL Mux", SND_SOC_NOPM, 0, 0, &aifoutl_mux),
SND_SOC_DAPM_MUX("AIFOUTR Mux", SND_SOC_NOPM, 0, 0, &aifoutr_mux),
SND_SOC_DAPM_AIF_OUT("AIFOUTL", "Capture", 0, SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_AIF_OUT("AIFOUTR", "Capture", 1, SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_AIF_IN("AIFINL", "Playback", 0, SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_AIF_IN("AIFINR", "Playback", 1, SND_SOC_NOPM, 0, 0),
SND_SOC_DAPM_MUX("DACL Mux", SND_SOC_NOPM, 0, 0, &aifinl_mux),
SND_SOC_DAPM_MUX("DACR Mux", SND_SOC_NOPM, 0, 0, &aifinr_mux),
SND_SOC_DAPM_MUX("DACL Sidetone", SND_SOC_NOPM, 0, 0, &sidetonel_mux),
SND_SOC_DAPM_MUX("DACR Sidetone", SND_SOC_NOPM, 0, 0, &sidetoner_mux),
SND_SOC_DAPM_DAC("DACL", NULL, WM8993_POWER_MANAGEMENT_3, 1, 0),
SND_SOC_DAPM_DAC("DACR", NULL, WM8993_POWER_MANAGEMENT_3, 0, 0),
SND_SOC_DAPM_MUX("Left Headphone Mux", SND_SOC_NOPM, 0, 0, &hpl_mux),
SND_SOC_DAPM_MUX("Right Headphone Mux", SND_SOC_NOPM, 0, 0, &hpr_mux),
SND_SOC_DAPM_MIXER("SPKL", WM8993_POWER_MANAGEMENT_3, 8, 0,
left_speaker_mixer, ARRAY_SIZE(left_speaker_mixer)),
SND_SOC_DAPM_MIXER("SPKR", WM8993_POWER_MANAGEMENT_3, 9, 0,
right_speaker_mixer, ARRAY_SIZE(right_speaker_mixer)),
SND_SOC_DAPM_PGA("Direct Voice", SND_SOC_NOPM, 0, 0, NULL, 0),
};
static const struct snd_soc_dapm_route routes[] = {
{ "MICBIAS1", NULL, "VMID" },
{ "MICBIAS2", NULL, "VMID" },
{ "ADCL", NULL, "CLK_SYS" },
{ "ADCL", NULL, "CLK_DSP" },
{ "ADCR", NULL, "CLK_SYS" },
{ "ADCR", NULL, "CLK_DSP" },
{ "AIFOUTL Mux", "Left", "ADCL" },
{ "AIFOUTL Mux", "Right", "ADCR" },
{ "AIFOUTR Mux", "Left", "ADCL" },
{ "AIFOUTR Mux", "Right", "ADCR" },
{ "AIFOUTL", NULL, "AIFOUTL Mux" },
{ "AIFOUTR", NULL, "AIFOUTR Mux" },
{ "DACL Mux", "Left", "AIFINL" },
{ "DACL Mux", "Right", "AIFINR" },
{ "DACR Mux", "Left", "AIFINL" },
{ "DACR Mux", "Right", "AIFINR" },
{ "DACL Sidetone", "Left", "ADCL" },
{ "DACL Sidetone", "Right", "ADCR" },
{ "DACR Sidetone", "Left", "ADCL" },
{ "DACR Sidetone", "Right", "ADCR" },
{ "DACL", NULL, "CLK_SYS" },
{ "DACL", NULL, "CLK_DSP" },
{ "DACL", NULL, "DACL Mux" },
{ "DACL", NULL, "DACL Sidetone" },
{ "DACR", NULL, "CLK_SYS" },
{ "DACR", NULL, "CLK_DSP" },
{ "DACR", NULL, "DACR Mux" },
{ "DACR", NULL, "DACR Sidetone" },
{ "Left Output Mixer", "DAC Switch", "DACL" },
{ "Right Output Mixer", "DAC Switch", "DACR" },
{ "Left Output PGA", NULL, "CLK_SYS" },
{ "Right Output PGA", NULL, "CLK_SYS" },
{ "SPKL", "DAC Switch", "DACL" },
{ "SPKL", NULL, "CLK_SYS" },
{ "SPKR", "DAC Switch", "DACR" },
{ "SPKR", NULL, "CLK_SYS" },
{ "Left Headphone Mux", "DAC", "DACL" },
{ "Right Headphone Mux", "DAC", "DACR" },
};
static int wm8993_set_bias_level(struct snd_soc_codec *codec,
enum snd_soc_bias_level level)
{
struct wm8993_priv *wm8993 = snd_soc_codec_get_drvdata(codec);
int ret;
switch (level) {
case SND_SOC_BIAS_ON:
case SND_SOC_BIAS_PREPARE:
/* VMID=2*40k */
snd_soc_update_bits(codec, WM8993_POWER_MANAGEMENT_1,
WM8993_VMID_SEL_MASK, 0x2);
snd_soc_update_bits(codec, WM8993_POWER_MANAGEMENT_2,
WM8993_TSHUT_ENA, WM8993_TSHUT_ENA);
break;
case SND_SOC_BIAS_STANDBY:
if (codec->dapm.bias_level == SND_SOC_BIAS_OFF) {
ret = regulator_bulk_enable(ARRAY_SIZE(wm8993->supplies),
wm8993->supplies);
if (ret != 0)
return ret;
regcache_cache_only(wm8993->regmap, false);
regcache_sync(wm8993->regmap);
/* Bring up VMID with fast soft start */
snd_soc_update_bits(codec, WM8993_ANTIPOP2,
WM8993_STARTUP_BIAS_ENA |
WM8993_VMID_BUF_ENA |
WM8993_VMID_RAMP_MASK |
WM8993_BIAS_SRC,
WM8993_STARTUP_BIAS_ENA |
WM8993_VMID_BUF_ENA |
WM8993_VMID_RAMP_MASK |
WM8993_BIAS_SRC);
/* If either line output is single ended we
* need the VMID buffer */
if (!wm8993->pdata.lineout1_diff ||
!wm8993->pdata.lineout2_diff)
snd_soc_update_bits(codec, WM8993_ANTIPOP1,
WM8993_LINEOUT_VMID_BUF_ENA,
WM8993_LINEOUT_VMID_BUF_ENA);
/* VMID=2*40k */
snd_soc_update_bits(codec, WM8993_POWER_MANAGEMENT_1,
WM8993_VMID_SEL_MASK |
WM8993_BIAS_ENA,
WM8993_BIAS_ENA | 0x2);
msleep(32);
/* Switch to normal bias */
snd_soc_update_bits(codec, WM8993_ANTIPOP2,
WM8993_BIAS_SRC |
WM8993_STARTUP_BIAS_ENA, 0);
}
/* VMID=2*240k */
snd_soc_update_bits(codec, WM8993_POWER_MANAGEMENT_1,
WM8993_VMID_SEL_MASK, 0x4);
snd_soc_update_bits(codec, WM8993_POWER_MANAGEMENT_2,
WM8993_TSHUT_ENA, 0);
break;
case SND_SOC_BIAS_OFF:
snd_soc_update_bits(codec, WM8993_ANTIPOP1,
WM8993_LINEOUT_VMID_BUF_ENA, 0);
snd_soc_update_bits(codec, WM8993_POWER_MANAGEMENT_1,
WM8993_VMID_SEL_MASK | WM8993_BIAS_ENA,
0);
snd_soc_update_bits(codec, WM8993_ANTIPOP2,
WM8993_STARTUP_BIAS_ENA |
WM8993_VMID_BUF_ENA |
WM8993_VMID_RAMP_MASK |
WM8993_BIAS_SRC, 0);
regcache_cache_only(wm8993->regmap, true);
regcache_mark_dirty(wm8993->regmap);
regulator_bulk_disable(ARRAY_SIZE(wm8993->supplies),
wm8993->supplies);
break;
}
codec->dapm.bias_level = level;
return 0;
}
static int wm8993_set_sysclk(struct snd_soc_dai *codec_dai,
int clk_id, unsigned int freq, int dir)
{
struct snd_soc_codec *codec = codec_dai->codec;
struct wm8993_priv *wm8993 = snd_soc_codec_get_drvdata(codec);
switch (clk_id) {
case WM8993_SYSCLK_MCLK:
wm8993->mclk_rate = freq;
case WM8993_SYSCLK_FLL:
wm8993->sysclk_source = clk_id;
break;
default:
return -EINVAL;
}
return 0;
}
static int wm8993_set_dai_fmt(struct snd_soc_dai *dai,
unsigned int fmt)
{
struct snd_soc_codec *codec = dai->codec;
struct wm8993_priv *wm8993 = snd_soc_codec_get_drvdata(codec);
unsigned int aif1 = snd_soc_read(codec, WM8993_AUDIO_INTERFACE_1);
unsigned int aif4 = snd_soc_read(codec, WM8993_AUDIO_INTERFACE_4);
aif1 &= ~(WM8993_BCLK_DIR | WM8993_AIF_BCLK_INV |
WM8993_AIF_LRCLK_INV | WM8993_AIF_FMT_MASK);
aif4 &= ~WM8993_LRCLK_DIR;
switch (fmt & SND_SOC_DAIFMT_MASTER_MASK) {
case SND_SOC_DAIFMT_CBS_CFS:
wm8993->master = 0;
break;
case SND_SOC_DAIFMT_CBS_CFM:
aif4 |= WM8993_LRCLK_DIR;
wm8993->master = 1;
break;
case SND_SOC_DAIFMT_CBM_CFS:
aif1 |= WM8993_BCLK_DIR;
wm8993->master = 1;
break;
case SND_SOC_DAIFMT_CBM_CFM:
aif1 |= WM8993_BCLK_DIR;
aif4 |= WM8993_LRCLK_DIR;
wm8993->master = 1;
break;
default:
return -EINVAL;
}
switch (fmt & SND_SOC_DAIFMT_FORMAT_MASK) {
case SND_SOC_DAIFMT_DSP_B:
aif1 |= WM8993_AIF_LRCLK_INV;
case SND_SOC_DAIFMT_DSP_A:
aif1 |= 0x18;
break;
case SND_SOC_DAIFMT_I2S:
aif1 |= 0x10;
break;
case SND_SOC_DAIFMT_RIGHT_J:
break;
case SND_SOC_DAIFMT_LEFT_J:
aif1 |= 0x8;
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:
aif1 |= WM8993_AIF_BCLK_INV;
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:
aif1 |= WM8993_AIF_BCLK_INV | WM8993_AIF_LRCLK_INV;
break;
case SND_SOC_DAIFMT_IB_NF:
aif1 |= WM8993_AIF_BCLK_INV;
break;
case SND_SOC_DAIFMT_NB_IF:
aif1 |= WM8993_AIF_LRCLK_INV;
break;
default:
return -EINVAL;
}
break;
default:
return -EINVAL;
}
snd_soc_write(codec, WM8993_AUDIO_INTERFACE_1, aif1);
snd_soc_write(codec, WM8993_AUDIO_INTERFACE_4, aif4);
return 0;
}
static int wm8993_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 wm8993_priv *wm8993 = snd_soc_codec_get_drvdata(codec);
int ret, i, best, best_val, cur_val;
unsigned int clocking1, clocking3, aif1, aif4;
clocking1 = snd_soc_read(codec, WM8993_CLOCKING_1);
clocking1 &= ~WM8993_BCLK_DIV_MASK;
clocking3 = snd_soc_read(codec, WM8993_CLOCKING_3);
clocking3 &= ~(WM8993_CLK_SYS_RATE_MASK | WM8993_SAMPLE_RATE_MASK);
aif1 = snd_soc_read(codec, WM8993_AUDIO_INTERFACE_1);
aif1 &= ~WM8993_AIF_WL_MASK;
aif4 = snd_soc_read(codec, WM8993_AUDIO_INTERFACE_4);
aif4 &= ~WM8993_LRCLK_RATE_MASK;
/* What BCLK do we need? */
wm8993->fs = params_rate(params);
wm8993->bclk = 2 * wm8993->fs;
if (wm8993->tdm_slots) {
dev_dbg(codec->dev, "Configuring for %d %d bit TDM slots\n",
wm8993->tdm_slots, wm8993->tdm_width);
wm8993->bclk *= wm8993->tdm_width * wm8993->tdm_slots;
} else {
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S16_LE:
wm8993->bclk *= 16;
break;
case SNDRV_PCM_FORMAT_S20_3LE:
wm8993->bclk *= 20;
aif1 |= 0x8;
break;
case SNDRV_PCM_FORMAT_S24_LE:
wm8993->bclk *= 24;
aif1 |= 0x10;
break;
case SNDRV_PCM_FORMAT_S32_LE:
wm8993->bclk *= 32;
aif1 |= 0x18;
break;
default:
return -EINVAL;
}
}
dev_dbg(codec->dev, "Target BCLK is %dHz\n", wm8993->bclk);
ret = configure_clock(codec);
if (ret != 0)
return ret;
/* Select nearest CLK_SYS_RATE */
best = 0;
best_val = abs((wm8993->sysclk_rate / clk_sys_rates[0].ratio)
- wm8993->fs);
for (i = 1; i < ARRAY_SIZE(clk_sys_rates); i++) {
cur_val = abs((wm8993->sysclk_rate /
clk_sys_rates[i].ratio) - wm8993->fs);
if (cur_val < best_val) {
best = i;
best_val = cur_val;
}
}
dev_dbg(codec->dev, "Selected CLK_SYS_RATIO of %d\n",
clk_sys_rates[best].ratio);
clocking3 |= (clk_sys_rates[best].clk_sys_rate
<< WM8993_CLK_SYS_RATE_SHIFT);
/* SAMPLE_RATE */
best = 0;
best_val = abs(wm8993->fs - sample_rates[0].rate);
for (i = 1; i < ARRAY_SIZE(sample_rates); i++) {
/* Closest match */
cur_val = abs(wm8993->fs - sample_rates[i].rate);
if (cur_val < best_val) {
best = i;
best_val = cur_val;
}
}
dev_dbg(codec->dev, "Selected SAMPLE_RATE of %dHz\n",
sample_rates[best].rate);
clocking3 |= (sample_rates[best].sample_rate
<< WM8993_SAMPLE_RATE_SHIFT);
/* BCLK_DIV */
best = 0;
best_val = INT_MAX;
for (i = 0; i < ARRAY_SIZE(bclk_divs); i++) {
cur_val = ((wm8993->sysclk_rate * 10) / bclk_divs[i].div)
- wm8993->bclk;
if (cur_val < 0) /* Table is sorted */
break;
if (cur_val < best_val) {
best = i;
best_val = cur_val;
}
}
wm8993->bclk = (wm8993->sysclk_rate * 10) / bclk_divs[best].div;
dev_dbg(codec->dev, "Selected BCLK_DIV of %d for %dHz BCLK\n",
bclk_divs[best].div, wm8993->bclk);
clocking1 |= bclk_divs[best].bclk_div << WM8993_BCLK_DIV_SHIFT;
/* LRCLK is a simple fraction of BCLK */
dev_dbg(codec->dev, "LRCLK_RATE is %d\n", wm8993->bclk / wm8993->fs);
aif4 |= wm8993->bclk / wm8993->fs;
snd_soc_write(codec, WM8993_CLOCKING_1, clocking1);
snd_soc_write(codec, WM8993_CLOCKING_3, clocking3);
snd_soc_write(codec, WM8993_AUDIO_INTERFACE_1, aif1);
snd_soc_write(codec, WM8993_AUDIO_INTERFACE_4, aif4);
/* ReTune Mobile? */
if (wm8993->pdata.num_retune_configs) {
u16 eq1 = snd_soc_read(codec, WM8993_EQ1);
struct wm8993_retune_mobile_setting *s;
best = 0;
best_val = abs(wm8993->pdata.retune_configs[0].rate
- wm8993->fs);
for (i = 0; i < wm8993->pdata.num_retune_configs; i++) {
cur_val = abs(wm8993->pdata.retune_configs[i].rate
- wm8993->fs);
if (cur_val < best_val) {
best_val = cur_val;
best = i;
}
}
s = &wm8993->pdata.retune_configs[best];
dev_dbg(codec->dev, "ReTune Mobile %s tuned for %dHz\n",
s->name, s->rate);
/* Disable EQ while we reconfigure */
snd_soc_update_bits(codec, WM8993_EQ1, WM8993_EQ_ENA, 0);
for (i = 1; i < ARRAY_SIZE(s->config); i++)
snd_soc_write(codec, WM8993_EQ1 + i, s->config[i]);
snd_soc_update_bits(codec, WM8993_EQ1, WM8993_EQ_ENA, eq1);
}
return 0;
}
static int wm8993_digital_mute(struct snd_soc_dai *codec_dai, int mute)
{
struct snd_soc_codec *codec = codec_dai->codec;
unsigned int reg;
reg = snd_soc_read(codec, WM8993_DAC_CTRL);
if (mute)
reg |= WM8993_DAC_MUTE;
else
reg &= ~WM8993_DAC_MUTE;
snd_soc_write(codec, WM8993_DAC_CTRL, reg);
return 0;
}
static int wm8993_set_tdm_slot(struct snd_soc_dai *dai, unsigned int tx_mask,
unsigned int rx_mask, int slots, int slot_width)
{
struct snd_soc_codec *codec = dai->codec;
struct wm8993_priv *wm8993 = snd_soc_codec_get_drvdata(codec);
int aif1 = 0;
int aif2 = 0;
/* Don't need to validate anything if we're turning off TDM */
if (slots == 0) {
wm8993->tdm_slots = 0;
goto out;
}
/* Note that we allow configurations we can't handle ourselves -
* for example, we can generate clocks for slots 2 and up even if
* we can't use those slots ourselves.
*/
aif1 |= WM8993_AIFADC_TDM;
aif2 |= WM8993_AIFDAC_TDM;
switch (rx_mask) {
case 3:
break;
case 0xc:
aif1 |= WM8993_AIFADC_TDM_CHAN;
break;
default:
return -EINVAL;
}
switch (tx_mask) {
case 3:
break;
case 0xc:
aif2 |= WM8993_AIFDAC_TDM_CHAN;
break;
default:
return -EINVAL;
}
out:
wm8993->tdm_width = slot_width;
wm8993->tdm_slots = slots / 2;
snd_soc_update_bits(codec, WM8993_AUDIO_INTERFACE_1,
WM8993_AIFADC_TDM | WM8993_AIFADC_TDM_CHAN, aif1);
snd_soc_update_bits(codec, WM8993_AUDIO_INTERFACE_2,
WM8993_AIFDAC_TDM | WM8993_AIFDAC_TDM_CHAN, aif2);
return 0;
}
static irqreturn_t wm8993_irq(int irq, void *data)
{
struct wm8993_priv *wm8993 = data;
int mask, val, ret;
ret = regmap_read(wm8993->regmap, WM8993_GPIO_CTRL_1, &val);
if (ret != 0) {
dev_err(wm8993->dev, "Failed to read interrupt status: %d\n",
ret);
return IRQ_NONE;
}
ret = regmap_read(wm8993->regmap, WM8993_GPIOCTRL_2, &mask);
if (ret != 0) {
dev_err(wm8993->dev, "Failed to read interrupt mask: %d\n",
ret);
return IRQ_NONE;
}
/* The IRQ pin status is visible in the register too */
val &= ~(mask | WM8993_IRQ);
if (!val)
return IRQ_NONE;
if (val & WM8993_TEMPOK_EINT)
dev_crit(wm8993->dev, "Thermal warning\n");
if (val & WM8993_FLL_LOCK_EINT) {
dev_dbg(wm8993->dev, "FLL locked\n");
complete(&wm8993->fll_lock);
}
ret = regmap_write(wm8993->regmap, WM8993_GPIO_CTRL_1, val);
if (ret != 0)
dev_err(wm8993->dev, "Failed to ack interrupt: %d\n", ret);
return IRQ_HANDLED;
}
static const struct snd_soc_dai_ops wm8993_ops = {
.set_sysclk = wm8993_set_sysclk,
.set_fmt = wm8993_set_dai_fmt,
.hw_params = wm8993_hw_params,
.digital_mute = wm8993_digital_mute,
.set_pll = wm8993_set_fll,
.set_tdm_slot = wm8993_set_tdm_slot,
};
#define WM8993_RATES SNDRV_PCM_RATE_8000_48000
#define WM8993_FORMATS (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_driver wm8993_dai = {
.name = "wm8993-hifi",
.playback = {
.stream_name = "Playback",
.channels_min = 1,
.channels_max = 2,
.rates = WM8993_RATES,
.formats = WM8993_FORMATS,
.sig_bits = 24,
},
.capture = {
.stream_name = "Capture",
.channels_min = 1,
.channels_max = 2,
.rates = WM8993_RATES,
.formats = WM8993_FORMATS,
.sig_bits = 24,
},
.ops = &wm8993_ops,
.symmetric_rates = 1,
};
static int wm8993_probe(struct snd_soc_codec *codec)
{
struct wm8993_priv *wm8993 = snd_soc_codec_get_drvdata(codec);
struct snd_soc_dapm_context *dapm = &codec->dapm;
int ret;
wm8993->hubs_data.hp_startup_mode = 1;
wm8993->hubs_data.dcs_codes_l = -2;
wm8993->hubs_data.dcs_codes_r = -2;
wm8993->hubs_data.series_startup = 1;
codec->control_data = wm8993->regmap;
ret = snd_soc_codec_set_cache_io(codec, 8, 16, SND_SOC_REGMAP);
if (ret != 0) {
dev_err(codec->dev, "Failed to set cache I/O: %d\n", ret);
return ret;
}
/* By default we're using the output mixers */
wm8993->class_w_users = 2;
/* Latch volume update bits and default ZC on */
snd_soc_update_bits(codec, WM8993_RIGHT_DAC_DIGITAL_VOLUME,
WM8993_DAC_VU, WM8993_DAC_VU);
snd_soc_update_bits(codec, WM8993_RIGHT_ADC_DIGITAL_VOLUME,
WM8993_ADC_VU, WM8993_ADC_VU);
/* Manualy manage the HPOUT sequencing for independent stereo
* control. */
snd_soc_update_bits(codec, WM8993_ANALOGUE_HP_0,
WM8993_HPOUT1_AUTO_PU, 0);
/* Use automatic clock configuration */
snd_soc_update_bits(codec, WM8993_CLOCKING_4, WM8993_SR_MODE, 0);
wm_hubs_handle_analogue_pdata(codec, wm8993->pdata.lineout1_diff,
wm8993->pdata.lineout2_diff,
wm8993->pdata.lineout1fb,
wm8993->pdata.lineout2fb,
wm8993->pdata.jd_scthr,
wm8993->pdata.jd_thr,
wm8993->pdata.micbias1_lvl,
wm8993->pdata.micbias2_lvl);
ret = wm8993_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
if (ret != 0)
return ret;
snd_soc_add_codec_controls(codec, wm8993_snd_controls,
ARRAY_SIZE(wm8993_snd_controls));
if (wm8993->pdata.num_retune_configs != 0) {
dev_dbg(codec->dev, "Using ReTune Mobile\n");
} else {
dev_dbg(codec->dev, "No ReTune Mobile, using normal EQ\n");
snd_soc_add_codec_controls(codec, wm8993_eq_controls,
ARRAY_SIZE(wm8993_eq_controls));
}
snd_soc_dapm_new_controls(dapm, wm8993_dapm_widgets,
ARRAY_SIZE(wm8993_dapm_widgets));
wm_hubs_add_analogue_controls(codec);
snd_soc_dapm_add_routes(dapm, routes, ARRAY_SIZE(routes));
wm_hubs_add_analogue_routes(codec, wm8993->pdata.lineout1_diff,
wm8993->pdata.lineout2_diff);
/* If the line outputs are differential then we aren't presenting
* VMID as an output and can disable it.
*/
if (wm8993->pdata.lineout1_diff && wm8993->pdata.lineout2_diff)
codec->dapm.idle_bias_off = 1;
return 0;
}
static int wm8993_remove(struct snd_soc_codec *codec)
{
struct wm8993_priv *wm8993 = snd_soc_codec_get_drvdata(codec);
wm8993_set_bias_level(codec, SND_SOC_BIAS_OFF);
regulator_bulk_free(ARRAY_SIZE(wm8993->supplies), wm8993->supplies);
return 0;
}
#ifdef CONFIG_PM
static int wm8993_suspend(struct snd_soc_codec *codec)
{
struct wm8993_priv *wm8993 = snd_soc_codec_get_drvdata(codec);
int fll_fout = wm8993->fll_fout;
int fll_fref = wm8993->fll_fref;
int ret;
/* Stop the FLL in an orderly fashion */
ret = _wm8993_set_fll(codec, 0, 0, 0, 0);
if (ret != 0) {
dev_err(codec->dev, "Failed to stop FLL\n");
return ret;
}
wm8993->fll_fout = fll_fout;
wm8993->fll_fref = fll_fref;
wm8993_set_bias_level(codec, SND_SOC_BIAS_OFF);
return 0;
}
static int wm8993_resume(struct snd_soc_codec *codec)
{
struct wm8993_priv *wm8993 = snd_soc_codec_get_drvdata(codec);
int ret;
wm8993_set_bias_level(codec, SND_SOC_BIAS_STANDBY);
/* Restart the FLL? */
if (wm8993->fll_fout) {
int fll_fout = wm8993->fll_fout;
int fll_fref = wm8993->fll_fref;
wm8993->fll_fref = 0;
wm8993->fll_fout = 0;
ret = _wm8993_set_fll(codec, 0, wm8993->fll_src,
fll_fref, fll_fout);
if (ret != 0)
dev_err(codec->dev, "Failed to restart FLL\n");
}
return 0;
}
#else
#define wm8993_suspend NULL
#define wm8993_resume NULL
#endif
/* Tune DC servo configuration */
static struct reg_default wm8993_regmap_patch[] = {
{ 0x44, 3 },
{ 0x56, 3 },
{ 0x44, 0 },
};
static const struct regmap_config wm8993_regmap = {
.reg_bits = 8,
.val_bits = 16,
.max_register = WM8993_MAX_REGISTER,
.volatile_reg = wm8993_volatile,
.readable_reg = wm8993_readable,
.cache_type = REGCACHE_RBTREE,
.reg_defaults = wm8993_reg_defaults,
.num_reg_defaults = ARRAY_SIZE(wm8993_reg_defaults),
};
static struct snd_soc_codec_driver soc_codec_dev_wm8993 = {
.probe = wm8993_probe,
.remove = wm8993_remove,
.suspend = wm8993_suspend,
.resume = wm8993_resume,
.set_bias_level = wm8993_set_bias_level,
};
static __devinit int wm8993_i2c_probe(struct i2c_client *i2c,
const struct i2c_device_id *id)
{
struct wm8993_priv *wm8993;
unsigned int reg;
int ret, i;
wm8993 = devm_kzalloc(&i2c->dev, sizeof(struct wm8993_priv),
GFP_KERNEL);
if (wm8993 == NULL)
return -ENOMEM;
wm8993->dev = &i2c->dev;
init_completion(&wm8993->fll_lock);
wm8993->regmap = regmap_init_i2c(i2c, &wm8993_regmap);
if (IS_ERR(wm8993->regmap)) {
ret = PTR_ERR(wm8993->regmap);
dev_err(&i2c->dev, "Failed to allocate regmap: %d\n", ret);
return ret;
}
i2c_set_clientdata(i2c, wm8993);
for (i = 0; i < ARRAY_SIZE(wm8993->supplies); i++)
wm8993->supplies[i].supply = wm8993_supply_names[i];
ret = regulator_bulk_get(&i2c->dev, ARRAY_SIZE(wm8993->supplies),
wm8993->supplies);
if (ret != 0) {
dev_err(&i2c->dev, "Failed to request supplies: %d\n", ret);
goto err;
}
ret = regulator_bulk_enable(ARRAY_SIZE(wm8993->supplies),
wm8993->supplies);
if (ret != 0) {
dev_err(&i2c->dev, "Failed to enable supplies: %d\n", ret);
goto err_get;
}
ret = regmap_read(wm8993->regmap, WM8993_SOFTWARE_RESET, &reg);
if (ret != 0) {
dev_err(&i2c->dev, "Failed to read chip ID: %d\n", ret);
goto err_enable;
}
if (reg != 0x8993) {
dev_err(&i2c->dev, "Invalid ID register value %x\n", reg);
ret = -EINVAL;
goto err_enable;
}
ret = regmap_write(wm8993->regmap, WM8993_SOFTWARE_RESET, 0xffff);
if (ret != 0)
goto err_enable;
ret = regmap_register_patch(wm8993->regmap, wm8993_regmap_patch,
ARRAY_SIZE(wm8993_regmap_patch));
if (ret != 0)
dev_warn(wm8993->dev, "Failed to apply regmap patch: %d\n",
ret);
if (i2c->irq) {
/* Put GPIO1 into interrupt mode (only GPIO1 can output IRQ) */
ret = regmap_update_bits(wm8993->regmap, WM8993_GPIO1,
WM8993_GPIO1_PD |
WM8993_GPIO1_SEL_MASK, 7);
if (ret != 0)
goto err_enable;
ret = request_threaded_irq(i2c->irq, NULL, wm8993_irq,
IRQF_TRIGGER_HIGH | IRQF_ONESHOT,
"wm8993", wm8993);
if (ret != 0)
goto err_enable;
}
regulator_bulk_disable(ARRAY_SIZE(wm8993->supplies), wm8993->supplies);
regcache_cache_only(wm8993->regmap, true);
ret = snd_soc_register_codec(&i2c->dev,
&soc_codec_dev_wm8993, &wm8993_dai, 1);
if (ret != 0) {
dev_err(&i2c->dev, "Failed to register CODEC: %d\n", ret);
goto err_irq;
}
return 0;
err_irq:
if (i2c->irq)
free_irq(i2c->irq, wm8993);
err_enable:
regulator_bulk_disable(ARRAY_SIZE(wm8993->supplies), wm8993->supplies);
err_get:
regulator_bulk_free(ARRAY_SIZE(wm8993->supplies), wm8993->supplies);
err:
regmap_exit(wm8993->regmap);
return ret;
}
static __devexit int wm8993_i2c_remove(struct i2c_client *i2c)
{
struct wm8993_priv *wm8993 = i2c_get_clientdata(i2c);
snd_soc_unregister_codec(&i2c->dev);
if (i2c->irq)
free_irq(i2c->irq, wm8993);
regmap_exit(wm8993->regmap);
regulator_bulk_disable(ARRAY_SIZE(wm8993->supplies), wm8993->supplies);
regulator_bulk_free(ARRAY_SIZE(wm8993->supplies), wm8993->supplies);
return 0;
}
static const struct i2c_device_id wm8993_i2c_id[] = {
{ "wm8993", 0 },
{ }
};
MODULE_DEVICE_TABLE(i2c, wm8993_i2c_id);
static struct i2c_driver wm8993_i2c_driver = {
.driver = {
.name = "wm8993",
.owner = THIS_MODULE,
},
.probe = wm8993_i2c_probe,
.remove = __devexit_p(wm8993_i2c_remove),
.id_table = wm8993_i2c_id,
};
static int __init wm8993_modinit(void)
{
int ret = 0;
ret = i2c_add_driver(&wm8993_i2c_driver);
if (ret != 0) {
pr_err("WM8993: Unable to register I2C driver: %d\n",
ret);
}
return ret;
}
module_init(wm8993_modinit);
static void __exit wm8993_exit(void)
{
i2c_del_driver(&wm8993_i2c_driver);
}
module_exit(wm8993_exit);
MODULE_DESCRIPTION("ASoC WM8993 driver");
MODULE_AUTHOR("Mark Brown <broonie@opensource.wolfsonmicro.com>");
MODULE_LICENSE("GPL");
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