494 lines
11 KiB
C
494 lines
11 KiB
C
/*
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* ak4642.c -- AK4642/AK4643 ALSA Soc Audio driver
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*
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* Copyright (C) 2009 Renesas Solutions Corp.
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* Kuninori Morimoto <morimoto.kuninori@renesas.com>
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*
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* Based on wm8731.c by Richard Purdie
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* Based on ak4535.c by Richard Purdie
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* Based on wm8753.c by Liam Girdwood
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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/* ** CAUTION **
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*
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* This is very simple driver.
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* It can use headphone output / stereo input only
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*
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* AK4642 is not tested.
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* AK4643 is tested.
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*/
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#include <linux/module.h>
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#include <linux/moduleparam.h>
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#include <linux/init.h>
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#include <linux/delay.h>
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#include <linux/pm.h>
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#include <linux/i2c.h>
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#include <linux/platform_device.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/soc.h>
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#include <sound/soc-dapm.h>
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#include <sound/initval.h>
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#include "ak4642.h"
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#define AK4642_VERSION "0.0.1"
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#define PW_MGMT1 0x00
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#define PW_MGMT2 0x01
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#define SG_SL1 0x02
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#define SG_SL2 0x03
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#define MD_CTL1 0x04
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#define MD_CTL2 0x05
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#define TIMER 0x06
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#define ALC_CTL1 0x07
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#define ALC_CTL2 0x08
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#define L_IVC 0x09
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#define L_DVC 0x0a
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#define ALC_CTL3 0x0b
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#define R_IVC 0x0c
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#define R_DVC 0x0d
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#define MD_CTL3 0x0e
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#define MD_CTL4 0x0f
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#define PW_MGMT3 0x10
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#define DF_S 0x11
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#define FIL3_0 0x12
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#define FIL3_1 0x13
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#define FIL3_2 0x14
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#define FIL3_3 0x15
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#define EQ_0 0x16
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#define EQ_1 0x17
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#define EQ_2 0x18
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#define EQ_3 0x19
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#define EQ_4 0x1a
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#define EQ_5 0x1b
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#define FIL1_0 0x1c
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#define FIL1_1 0x1d
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#define FIL1_2 0x1e
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#define FIL1_3 0x1f
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#define PW_MGMT4 0x20
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#define MD_CTL5 0x21
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#define LO_MS 0x22
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#define HP_MS 0x23
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#define SPK_MS 0x24
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#define AK4642_CACHEREGNUM 0x25
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struct snd_soc_codec_device soc_codec_dev_ak4642;
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/* codec private data */
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struct ak4642_priv {
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struct snd_soc_codec codec;
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unsigned int sysclk;
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};
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static struct snd_soc_codec *ak4642_codec;
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/*
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* ak4642 register cache
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*/
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static const u16 ak4642_reg[AK4642_CACHEREGNUM] = {
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0x0000, 0x0000, 0x0001, 0x0000,
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0x0002, 0x0000, 0x0000, 0x0000,
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0x00e1, 0x00e1, 0x0018, 0x0000,
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0x00e1, 0x0018, 0x0011, 0x0008,
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0x0000, 0x0000, 0x0000, 0x0000,
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0x0000, 0x0000, 0x0000, 0x0000,
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0x0000, 0x0000, 0x0000, 0x0000,
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0x0000, 0x0000, 0x0000, 0x0000,
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0x0000, 0x0000, 0x0000, 0x0000,
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0x0000,
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};
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/*
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* read ak4642 register cache
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*/
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static inline unsigned int ak4642_read_reg_cache(struct snd_soc_codec *codec,
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unsigned int reg)
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{
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u16 *cache = codec->reg_cache;
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if (reg >= AK4642_CACHEREGNUM)
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return -1;
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return cache[reg];
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}
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/*
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* write ak4642 register cache
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*/
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static inline void ak4642_write_reg_cache(struct snd_soc_codec *codec,
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u16 reg, unsigned int value)
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{
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u16 *cache = codec->reg_cache;
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if (reg >= AK4642_CACHEREGNUM)
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return;
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cache[reg] = value;
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}
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/*
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* write to the AK4642 register space
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*/
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static int ak4642_write(struct snd_soc_codec *codec, unsigned int reg,
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unsigned int value)
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{
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u8 data[2];
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/* data is
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* D15..D8 AK4642 register offset
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* D7...D0 register data
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*/
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data[0] = reg & 0xff;
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data[1] = value & 0xff;
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if (codec->hw_write(codec->control_data, data, 2) == 2) {
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ak4642_write_reg_cache(codec, reg, value);
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return 0;
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} else
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return -EIO;
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}
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static int ak4642_sync(struct snd_soc_codec *codec)
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{
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u16 *cache = codec->reg_cache;
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int i, r = 0;
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for (i = 0; i < AK4642_CACHEREGNUM; i++)
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r |= ak4642_write(codec, i, cache[i]);
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return r;
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};
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static int ak4642_dai_startup(struct snd_pcm_substream *substream,
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struct snd_soc_dai *dai)
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{
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int is_play = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
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struct snd_soc_codec *codec = dai->codec;
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if (is_play) {
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/*
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* start headphone output
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*
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* PLL, Master Mode
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* Audio I/F Format :MSB justified (ADC & DAC)
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* Sampling Frequency: 44.1kHz
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* Digital Volume: −8dB
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* Bass Boost Level : Middle
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*
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* This operation came from example code of
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* "ASAHI KASEI AK4642" (japanese) manual p97.
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*
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* Example code use 0x39, 0x79 value for 0x01 address,
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* But we need MCKO (0x02) bit now
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*/
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ak4642_write(codec, 0x05, 0x27);
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ak4642_write(codec, 0x0f, 0x09);
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ak4642_write(codec, 0x0e, 0x19);
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ak4642_write(codec, 0x09, 0x91);
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ak4642_write(codec, 0x0c, 0x91);
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ak4642_write(codec, 0x0a, 0x28);
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ak4642_write(codec, 0x0d, 0x28);
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ak4642_write(codec, 0x00, 0x64);
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ak4642_write(codec, 0x01, 0x3b); /* + MCKO bit */
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ak4642_write(codec, 0x01, 0x7b); /* + MCKO bit */
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} else {
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/*
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* start stereo input
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*
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* PLL Master Mode
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* Audio I/F Format:MSB justified (ADC & DAC)
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* Sampling Frequency:44.1kHz
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* Pre MIC AMP:+20dB
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* MIC Power On
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* ALC setting:Refer to Table 35
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* ALC bit=“1”
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*
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* This operation came from example code of
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* "ASAHI KASEI AK4642" (japanese) manual p94.
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*/
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ak4642_write(codec, 0x05, 0x27);
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ak4642_write(codec, 0x02, 0x05);
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ak4642_write(codec, 0x06, 0x3c);
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ak4642_write(codec, 0x08, 0xe1);
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ak4642_write(codec, 0x0b, 0x00);
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ak4642_write(codec, 0x07, 0x21);
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ak4642_write(codec, 0x00, 0x41);
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ak4642_write(codec, 0x10, 0x01);
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}
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return 0;
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}
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static void ak4642_dai_shutdown(struct snd_pcm_substream *substream,
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struct snd_soc_dai *dai)
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{
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int is_play = substream->stream == SNDRV_PCM_STREAM_PLAYBACK;
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struct snd_soc_codec *codec = dai->codec;
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if (is_play) {
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/* stop headphone output */
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ak4642_write(codec, 0x01, 0x3b);
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ak4642_write(codec, 0x01, 0x0b);
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ak4642_write(codec, 0x00, 0x40);
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ak4642_write(codec, 0x0e, 0x11);
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ak4642_write(codec, 0x0f, 0x08);
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} else {
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/* stop stereo input */
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ak4642_write(codec, 0x00, 0x40);
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ak4642_write(codec, 0x10, 0x00);
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ak4642_write(codec, 0x07, 0x01);
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}
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}
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static int ak4642_dai_set_sysclk(struct snd_soc_dai *codec_dai,
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int clk_id, unsigned int freq, int dir)
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{
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struct snd_soc_codec *codec = codec_dai->codec;
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struct ak4642_priv *ak4642 = codec->private_data;
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ak4642->sysclk = freq;
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return 0;
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}
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static struct snd_soc_dai_ops ak4642_dai_ops = {
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.startup = ak4642_dai_startup,
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.shutdown = ak4642_dai_shutdown,
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.set_sysclk = ak4642_dai_set_sysclk,
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};
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struct snd_soc_dai ak4642_dai = {
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.name = "AK4642",
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.playback = {
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.stream_name = "Playback",
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.channels_min = 1,
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.channels_max = 2,
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.rates = SNDRV_PCM_RATE_8000_48000,
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.formats = SNDRV_PCM_FMTBIT_S16_LE },
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.capture = {
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.stream_name = "Capture",
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.channels_min = 1,
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.channels_max = 2,
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.rates = SNDRV_PCM_RATE_8000_48000,
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.formats = SNDRV_PCM_FMTBIT_S16_LE },
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.ops = &ak4642_dai_ops,
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};
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EXPORT_SYMBOL_GPL(ak4642_dai);
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static int ak4642_resume(struct platform_device *pdev)
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{
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struct snd_soc_device *socdev = platform_get_drvdata(pdev);
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struct snd_soc_codec *codec = socdev->card->codec;
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ak4642_sync(codec);
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return 0;
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}
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/*
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* initialise the AK4642 driver
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* register the mixer and dsp interfaces with the kernel
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*/
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static int ak4642_init(struct ak4642_priv *ak4642)
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{
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struct snd_soc_codec *codec = &ak4642->codec;
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int ret = 0;
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if (ak4642_codec) {
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dev_err(codec->dev, "Another ak4642 is registered\n");
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return -EINVAL;
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}
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mutex_init(&codec->mutex);
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INIT_LIST_HEAD(&codec->dapm_widgets);
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INIT_LIST_HEAD(&codec->dapm_paths);
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codec->private_data = ak4642;
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codec->name = "AK4642";
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codec->owner = THIS_MODULE;
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codec->read = ak4642_read_reg_cache;
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codec->write = ak4642_write;
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codec->dai = &ak4642_dai;
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codec->num_dai = 1;
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codec->hw_write = (hw_write_t)i2c_master_send;
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codec->reg_cache_size = ARRAY_SIZE(ak4642_reg);
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codec->reg_cache = kmemdup(ak4642_reg,
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sizeof(ak4642_reg), GFP_KERNEL);
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if (!codec->reg_cache)
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return -ENOMEM;
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ak4642_dai.dev = codec->dev;
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ak4642_codec = codec;
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ret = snd_soc_register_codec(codec);
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if (ret) {
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dev_err(codec->dev, "Failed to register codec: %d\n", ret);
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goto reg_cache_err;
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}
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ret = snd_soc_register_dai(&ak4642_dai);
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if (ret) {
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dev_err(codec->dev, "Failed to register DAI: %d\n", ret);
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snd_soc_unregister_codec(codec);
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goto reg_cache_err;
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}
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/*
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* clock setting
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*
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* Audio I/F Format: MSB justified (ADC & DAC)
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* BICK frequency at Master Mode: 64fs
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* Input Master Clock Select at PLL Mode: 11.2896MHz
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* MCKO: Enable
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* Sampling Frequency: 44.1kHz
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*
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* This operation came from example code of
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* "ASAHI KASEI AK4642" (japanese) manual p89.
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*
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* please fix-me
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*/
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ak4642_write(codec, 0x01, 0x08);
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ak4642_write(codec, 0x04, 0x4a);
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ak4642_write(codec, 0x05, 0x27);
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ak4642_write(codec, 0x00, 0x40);
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ak4642_write(codec, 0x01, 0x0b);
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return ret;
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reg_cache_err:
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kfree(codec->reg_cache);
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codec->reg_cache = NULL;
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return ret;
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}
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#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
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static int ak4642_i2c_probe(struct i2c_client *i2c,
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const struct i2c_device_id *id)
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{
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struct ak4642_priv *ak4642;
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struct snd_soc_codec *codec;
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int ret;
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ak4642 = kzalloc(sizeof(struct ak4642_priv), GFP_KERNEL);
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if (!ak4642)
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return -ENOMEM;
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codec = &ak4642->codec;
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codec->dev = &i2c->dev;
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i2c_set_clientdata(i2c, ak4642);
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codec->control_data = i2c;
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ret = ak4642_init(ak4642);
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if (ret < 0)
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printk(KERN_ERR "failed to initialise AK4642\n");
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return ret;
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}
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static int ak4642_i2c_remove(struct i2c_client *client)
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{
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struct ak4642_priv *ak4642 = i2c_get_clientdata(client);
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snd_soc_unregister_dai(&ak4642_dai);
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snd_soc_unregister_codec(&ak4642->codec);
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kfree(ak4642->codec.reg_cache);
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kfree(ak4642);
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ak4642_codec = NULL;
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return 0;
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}
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static const struct i2c_device_id ak4642_i2c_id[] = {
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{ "ak4642", 0 },
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{ "ak4643", 0 },
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{ }
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};
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MODULE_DEVICE_TABLE(i2c, ak4642_i2c_id);
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static struct i2c_driver ak4642_i2c_driver = {
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.driver = {
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.name = "AK4642 I2C Codec",
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.owner = THIS_MODULE,
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},
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.probe = ak4642_i2c_probe,
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.remove = ak4642_i2c_remove,
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.id_table = ak4642_i2c_id,
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};
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#endif
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static int ak4642_probe(struct platform_device *pdev)
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{
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struct snd_soc_device *socdev = platform_get_drvdata(pdev);
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int ret;
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if (!ak4642_codec) {
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dev_err(&pdev->dev, "Codec device not registered\n");
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return -ENODEV;
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}
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socdev->card->codec = ak4642_codec;
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/* register pcms */
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ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
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if (ret < 0) {
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printk(KERN_ERR "ak4642: failed to create pcms\n");
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goto pcm_err;
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}
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dev_info(&pdev->dev, "AK4642 Audio Codec %s", AK4642_VERSION);
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return ret;
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pcm_err:
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return ret;
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}
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/* power down chip */
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static int ak4642_remove(struct platform_device *pdev)
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{
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struct snd_soc_device *socdev = platform_get_drvdata(pdev);
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snd_soc_free_pcms(socdev);
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snd_soc_dapm_free(socdev);
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return 0;
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}
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struct snd_soc_codec_device soc_codec_dev_ak4642 = {
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.probe = ak4642_probe,
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.remove = ak4642_remove,
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.resume = ak4642_resume,
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};
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EXPORT_SYMBOL_GPL(soc_codec_dev_ak4642);
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static int __init ak4642_modinit(void)
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{
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int ret;
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#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
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ret = i2c_add_driver(&ak4642_i2c_driver);
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#endif
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return ret;
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}
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module_init(ak4642_modinit);
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static void __exit ak4642_exit(void)
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{
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#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE)
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i2c_del_driver(&ak4642_i2c_driver);
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#endif
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}
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module_exit(ak4642_exit);
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MODULE_DESCRIPTION("Soc AK4642 driver");
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MODULE_AUTHOR("Kuninori Morimoto <morimoto.kuninori@renesas.com>");
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MODULE_LICENSE("GPL");
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