diff options
Diffstat (limited to 'sound/soc/codecs/ak4642.c')
| -rw-r--r-- | sound/soc/codecs/ak4642.c | 502 |
1 files changed, 502 insertions, 0 deletions
diff --git a/sound/soc/codecs/ak4642.c b/sound/soc/codecs/ak4642.c new file mode 100644 index 00000000000..e057c7b578d --- /dev/null +++ b/sound/soc/codecs/ak4642.c @@ -0,0 +1,502 @@ +/* + * ak4642.c -- AK4642/AK4643 ALSA Soc Audio driver + * + * Copyright (C) 2009 Renesas Solutions Corp. + * Kuninori Morimoto <morimoto.kuninori@renesas.com> + * + * Based on wm8731.c by Richard Purdie + * Based on ak4535.c by Richard Purdie + * Based on wm8753.c by Liam Girdwood + * + * 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. + */ + +/* ** CAUTION ** + * + * This is very simple driver. + * It can use headphone output / stereo input only + * + * AK4642 is not tested. + * AK4643 is tested. + */ + +#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/platform_device.h> +#include <sound/core.h> +#include <sound/pcm.h> +#include <sound/pcm_params.h> +#include <sound/soc.h> +#include <sound/soc-dapm.h> +#include <sound/initval.h> + +#include "ak4642.h" + +#define AK4642_VERSION "0.0.1" + +#define PW_MGMT1 0x00 +#define PW_MGMT2 0x01 +#define SG_SL1 0x02 +#define SG_SL2 0x03 +#define MD_CTL1 0x04 +#define MD_CTL2 0x05 +#define TIMER 0x06 +#define ALC_CTL1 0x07 +#define ALC_CTL2 0x08 +#define L_IVC 0x09 +#define L_DVC 0x0a +#define ALC_CTL3 0x0b +#define R_IVC 0x0c +#define R_DVC 0x0d +#define MD_CTL3 0x0e +#define MD_CTL4 0x0f +#define PW_MGMT3 0x10 +#define DF_S 0x11 +#define FIL3_0 0x12 +#define FIL3_1 0x13 +#define FIL3_2 0x14 +#define FIL3_3 0x15 +#define EQ_0 0x16 +#define EQ_1 0x17 +#define EQ_2 0x18 +#define EQ_3 0x19 +#define EQ_4 0x1a +#define EQ_5 0x1b +#define FIL1_0 0x1c +#define FIL1_1 0x1d +#define FIL1_2 0x1e +#define FIL1_3 0x1f +#define PW_MGMT4 0x20 +#define MD_CTL5 0x21 +#define LO_MS 0x22 +#define HP_MS 0x23 +#define SPK_MS 0x24 + +#define AK4642_CACHEREGNUM 0x25 + +struct snd_soc_codec_device soc_codec_dev_ak4642; + +/* codec private data */ +struct ak4642_priv { + struct snd_soc_codec codec; + unsigned int sysclk; +}; + +static struct snd_soc_codec *ak4642_codec; + +/* + * ak4642 register cache + */ +static const u16 ak4642_reg[AK4642_CACHEREGNUM] = { + 0x0000, 0x0000, 0x0001, 0x0000, + 0x0002, 0x0000, 0x0000, 0x0000, + 0x00e1, 0x00e1, 0x0018, 0x0000, + 0x00e1, 0x0018, 0x0011, 0x0008, + 0x0000, 0x0000, 0x0000, 0x0000, + 0x0000, 0x0000, 0x0000, 0x0000, + 0x0000, 0x0000, 0x0000, 0x0000, + 0x0000, 0x0000, 0x0000, 0x0000, + 0x0000, 0x0000, 0x0000, 0x0000, + 0x0000, +}; + +/* + * read ak4642 register cache + */ +static inline unsigned int ak4642_read_reg_cache(struct snd_soc_codec *codec, + unsigned int reg) +{ + u16 *cache = codec->reg_cache; + if (reg >= AK4642_CACHEREGNUM) + return -1; + return cache[reg]; +} + +/* + * write ak4642 register cache + */ +static inline void ak4642_write_reg_cache(struct snd_soc_codec *codec, + u16 reg, unsigned int value) +{ + u16 *cache = codec->reg_cache; + if (reg >= AK4642_CACHEREGNUM) + return; + + cache[reg] = value; +} + +/* + * write to the AK4642 register space + */ +static int ak4642_write(struct snd_soc_codec *codec, unsigned int reg, + unsigned int value) +{ + u8 data[2]; + + /* data is + * D15..D8 AK4642 register offset + * D7...D0 register data + */ + data[0] = reg & 0xff; + data[1] = value & 0xff; + + if (codec->hw_write(codec->control_data, data, 2) == 2) { + ak4642_write_reg_cache(codec, reg, value); + return 0; + } else + return -EIO; +} + +static int ak4642_sync(struct snd_soc_codec *codec) +{ + u16 *cache = codec->reg_cache; + int i, r = 0; + + for (i = 0; i < AK4642_CACHEREGNUM; i++) + r |= ak4642_write(codec, i, cache[i]); + + return r; +}; + +static int ak4642_dai_startup(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + int is_play = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; + struct snd_soc_codec *codec = dai->codec; + + if (is_play) { + /* + * start headphone output + * + * PLL, Master Mode + * Audio I/F Format :MSB justified (ADC & DAC) + * Sampling Frequency: 44.1kHz + * Digital Volume: −8dB + * Bass Boost Level : Middle + * + * This operation came from example code of + * "ASAHI KASEI AK4642" (japanese) manual p97. + * + * Example code use 0x39, 0x79 value for 0x01 address, + * But we need MCKO (0x02) bit now + */ + ak4642_write(codec, 0x05, 0x27); + ak4642_write(codec, 0x0f, 0x09); + ak4642_write(codec, 0x0e, 0x19); + ak4642_write(codec, 0x09, 0x91); + ak4642_write(codec, 0x0c, 0x91); + ak4642_write(codec, 0x0a, 0x28); + ak4642_write(codec, 0x0d, 0x28); + ak4642_write(codec, 0x00, 0x64); + ak4642_write(codec, 0x01, 0x3b); /* + MCKO bit */ + ak4642_write(codec, 0x01, 0x7b); /* + MCKO bit */ + } else { + /* + * start stereo input + * + * PLL Master Mode + * Audio I/F Format:MSB justified (ADC & DAC) + * Sampling Frequency:44.1kHz + * Pre MIC AMP:+20dB + * MIC Power On + * ALC setting:Refer to Table 35 + * ALC bit=“1” + * + * This operation came from example code of + * "ASAHI KASEI AK4642" (japanese) manual p94. + */ + ak4642_write(codec, 0x05, 0x27); + ak4642_write(codec, 0x02, 0x05); + ak4642_write(codec, 0x06, 0x3c); + ak4642_write(codec, 0x08, 0xe1); + ak4642_write(codec, 0x0b, 0x00); + ak4642_write(codec, 0x07, 0x21); + ak4642_write(codec, 0x00, 0x41); + ak4642_write(codec, 0x10, 0x01); + } + + return 0; +} + +static void ak4642_dai_shutdown(struct snd_pcm_substream *substream, + struct snd_soc_dai *dai) +{ + int is_play = substream->stream == SNDRV_PCM_STREAM_PLAYBACK; + struct snd_soc_codec *codec = dai->codec; + + if (is_play) { + /* stop headphone output */ + ak4642_write(codec, 0x01, 0x3b); + ak4642_write(codec, 0x01, 0x0b); + ak4642_write(codec, 0x00, 0x40); + ak4642_write(codec, 0x0e, 0x11); + ak4642_write(codec, 0x0f, 0x08); + } else { + /* stop stereo input */ + ak4642_write(codec, 0x00, 0x40); + ak4642_write(codec, 0x10, 0x00); + ak4642_write(codec, 0x07, 0x01); + } +} + +static int ak4642_dai_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 ak4642_priv *ak4642 = codec->private_data; + + ak4642->sysclk = freq; + return 0; +} + +static struct snd_soc_dai_ops ak4642_dai_ops = { + .startup = ak4642_dai_startup, + .shutdown = ak4642_dai_shutdown, + .set_sysclk = ak4642_dai_set_sysclk, +}; + +struct snd_soc_dai ak4642_dai = { + .name = "AK4642", + .playback = { + .stream_name = "Playback", + .channels_min = 1, + .channels_max = 2, + .rates = SNDRV_PCM_RATE_8000_48000, + .formats = SNDRV_PCM_FMTBIT_S16_LE }, + .capture = { + .stream_name = "Capture", + .channels_min = 1, + .channels_max = 2, + .rates = SNDRV_PCM_RATE_8000_48000, + .formats = SNDRV_PCM_FMTBIT_S16_LE }, + .ops = &ak4642_dai_ops, +}; +EXPORT_SYMBOL_GPL(ak4642_dai); + +static int ak4642_resume(struct platform_device *pdev) +{ + struct snd_soc_device *socdev = platform_get_drvdata(pdev); + struct snd_soc_codec *codec = socdev->card->codec; + + ak4642_sync(codec); + return 0; +} + +/* + * initialise the AK4642 driver + * register the mixer and dsp interfaces with the kernel + */ +static int ak4642_init(struct ak4642_priv *ak4642) +{ + struct snd_soc_codec *codec = &ak4642->codec; + int ret = 0; + + if (ak4642_codec) { + dev_err(codec->dev, "Another ak4642 is registered\n"); + return -EINVAL; + } + + mutex_init(&codec->mutex); + INIT_LIST_HEAD(&codec->dapm_widgets); + INIT_LIST_HEAD(&codec->dapm_paths); + + codec->private_data = ak4642; + codec->name = "AK4642"; + codec->owner = THIS_MODULE; + codec->read = ak4642_read_reg_cache; + codec->write = ak4642_write; + codec->dai = &ak4642_dai; + codec->num_dai = 1; + codec->hw_write = (hw_write_t)i2c_master_send; + codec->reg_cache_size = ARRAY_SIZE(ak4642_reg); + codec->reg_cache = kmemdup(ak4642_reg, + sizeof(ak4642_reg), GFP_KERNEL); + + if (!codec->reg_cache) + return -ENOMEM; + + ak4642_dai.dev = codec->dev; + ak4642_codec = codec; + + ret = snd_soc_register_codec(codec); + if (ret) { + dev_err(codec->dev, "Failed to register codec: %d\n", ret); + goto reg_cache_err; + } + + ret = snd_soc_register_dai(&ak4642_dai); + if (ret) { + dev_err(codec->dev, "Failed to register DAI: %d\n", ret); + snd_soc_unregister_codec(codec); + goto reg_cache_err; + } + + /* + * clock setting + * + * Audio I/F Format: MSB justified (ADC & DAC) + * BICK frequency at Master Mode: 64fs + * Input Master Clock Select at PLL Mode: 11.2896MHz + * MCKO: Enable + * Sampling Frequency: 44.1kHz + * + * This operation came from example code of + * "ASAHI KASEI AK4642" (japanese) manual p89. + * + * please fix-me + */ + ak4642_write(codec, 0x01, 0x08); + ak4642_write(codec, 0x04, 0x4a); + ak4642_write(codec, 0x05, 0x27); + ak4642_write(codec, 0x00, 0x40); + ak4642_write(codec, 0x01, 0x0b); + + return ret; + +reg_cache_err: + kfree(codec->reg_cache); + codec->reg_cache = NULL; + + return ret; +} + +#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) +static int ak4642_i2c_probe(struct i2c_client *i2c, + const struct i2c_device_id *id) +{ + struct ak4642_priv *ak4642; + struct snd_soc_codec *codec; + int ret; + + ak4642 = kzalloc(sizeof(struct ak4642_priv), GFP_KERNEL); + if (!ak4642) + return -ENOMEM; + + codec = &ak4642->codec; + codec->dev = &i2c->dev; + + i2c_set_clientdata(i2c, ak4642); + codec->control_data = i2c; + + ret = ak4642_init(ak4642); + if (ret < 0) + printk(KERN_ERR "failed to initialise AK4642\n"); + + return ret; +} + +static int ak4642_i2c_remove(struct i2c_client *client) +{ + struct ak4642_priv *ak4642 = i2c_get_clientdata(client); + + snd_soc_unregister_dai(&ak4642_dai); + snd_soc_unregister_codec(&ak4642->codec); + kfree(ak4642->codec.reg_cache); + kfree(ak4642); + ak4642_codec = NULL; + + return 0; +} + +static const struct i2c_device_id ak4642_i2c_id[] = { + { "ak4642", 0 }, + { "ak4643", 0 }, + { } +}; +MODULE_DEVICE_TABLE(i2c, ak4642_i2c_id); + +static struct i2c_driver ak4642_i2c_driver = { + .driver = { + .name = "AK4642 I2C Codec", + .owner = THIS_MODULE, + }, + .probe = ak4642_i2c_probe, + .remove = ak4642_i2c_remove, + .id_table = ak4642_i2c_id, +}; + +#endif + +static int ak4642_probe(struct platform_device *pdev) +{ + struct snd_soc_device *socdev = platform_get_drvdata(pdev); + int ret; + + if (!ak4642_codec) { + dev_err(&pdev->dev, "Codec device not registered\n"); + return -ENODEV; + } + + socdev->card->codec = ak4642_codec; + + /* register pcms */ + ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1); + if (ret < 0) { + printk(KERN_ERR "ak4642: failed to create pcms\n"); + goto pcm_err; + } + + ret = snd_soc_init_card(socdev); + if (ret < 0) { + printk(KERN_ERR "ak4642: failed to register card\n"); + goto card_err; + } + + dev_info(&pdev->dev, "AK4642 Audio Codec %s", AK4642_VERSION); + return ret; + +card_err: + snd_soc_free_pcms(socdev); + snd_soc_dapm_free(socdev); +pcm_err: + return ret; + +} + +/* power down chip */ +static int ak4642_remove(struct platform_device *pdev) +{ + struct snd_soc_device *socdev = platform_get_drvdata(pdev); + + snd_soc_free_pcms(socdev); + snd_soc_dapm_free(socdev); + + return 0; +} + +struct snd_soc_codec_device soc_codec_dev_ak4642 = { + .probe = ak4642_probe, + .remove = ak4642_remove, + .resume = ak4642_resume, +}; +EXPORT_SYMBOL_GPL(soc_codec_dev_ak4642); + +static int __init ak4642_modinit(void) +{ + int ret; +#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) + ret = i2c_add_driver(&ak4642_i2c_driver); +#endif + return ret; + +} +module_init(ak4642_modinit); + +static void __exit ak4642_exit(void) +{ +#if defined(CONFIG_I2C) || defined(CONFIG_I2C_MODULE) + i2c_del_driver(&ak4642_i2c_driver); +#endif + +} +module_exit(ak4642_exit); + +MODULE_DESCRIPTION("Soc AK4642 driver"); +MODULE_AUTHOR("Kuninori Morimoto <morimoto.kuninori@renesas.com>"); +MODULE_LICENSE("GPL"); |