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root/sound/soc/codecs/ad1980.c

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DEFINITIONS

This source file includes following definitions.
  1. ad1980_add_controls
  2. ac97_read
  3. ac97_write
  4. ad1980_reset
  5. ad1980_soc_probe
  6. ad1980_soc_remove

/*
 * ad1980.c  --  ALSA Soc AD1980 codec support
 *
 * Copyright:   Analog Device Inc.
 * Author:      Roy Huang <roy.huang@analog.com>
 *              Cliff Cai <cliff.cai@analog.com>
 *
 *  This program is free software; you can redistribute  it and/or modify it
 *  under  the terms of  the GNU General  Public License as published by the
 *  Free Software Foundation;  either version 2 of the  License, or (at your
 *  option) any later version.
 */

#include <linux/init.h>
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/device.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/ac97_codec.h>
#include <sound/initval.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>

#include "ad1980.h"

static unsigned int ac97_read(struct snd_soc_codec *codec,
        unsigned int reg);
static int ac97_write(struct snd_soc_codec *codec,
        unsigned int reg, unsigned int val);

/*
 * AD1980 register cache
 */
static const u16 ad1980_reg[] = {
        0x0090, 0x8000, 0x8000, 0x8000, /* 0 - 6  */
        0x0000, 0x0000, 0x8008, 0x8008, /* 8 - e  */
        0x8808, 0x8808, 0x0000, 0x8808, /* 10 - 16 */
        0x8808, 0x0000, 0x8000, 0x0000, /* 18 - 1e */
        0x0000, 0x0000, 0x0000, 0x0000, /* 20 - 26 */
        0x03c7, 0x0000, 0xbb80, 0xbb80, /* 28 - 2e */
        0xbb80, 0xbb80, 0x0000, 0x8080, /* 30 - 36 */
        0x8080, 0x2000, 0x0000, 0x0000, /* 38 - 3e */
        0x0000, 0x0000, 0x0000, 0x0000, /* reserved */
        0x0000, 0x0000, 0x0000, 0x0000, /* reserved */
        0x0000, 0x0000, 0x0000, 0x0000, /* reserved */
        0x0000, 0x0000, 0x0000, 0x0000, /* reserved */
        0x8080, 0x0000, 0x0000, 0x0000, /* 60 - 66 */
        0x0000, 0x0000, 0x0000, 0x0000, /* reserved */
        0x0000, 0x0000, 0x1001, 0x0000, /* 70 - 76 */
        0x0000, 0x0000, 0x4144, 0x5370  /* 78 - 7e */
};

static const char *ad1980_rec_sel[] = {"Mic", "CD", "NC", "AUX", "Line",
                "Stereo Mix", "Mono Mix", "Phone"};

static const struct soc_enum ad1980_cap_src =
        SOC_ENUM_DOUBLE(AC97_REC_SEL, 8, 0, 7, ad1980_rec_sel);

static const struct snd_kcontrol_new ad1980_snd_ac97_controls[] = {
SOC_DOUBLE("Master Playback Volume", AC97_MASTER, 8, 0, 31, 1),
SOC_SINGLE("Master Playback Switch", AC97_MASTER, 15, 1, 1),

SOC_DOUBLE("Headphone Playback Volume", AC97_HEADPHONE, 8, 0, 31, 1),
SOC_SINGLE("Headphone Playback Switch", AC97_HEADPHONE, 15, 1, 1),

SOC_DOUBLE("PCM Playback Volume", AC97_PCM, 8, 0, 31, 1),
SOC_SINGLE("PCM Playback Switch", AC97_PCM, 15, 1, 1),

SOC_DOUBLE("PCM Capture Volume", AC97_REC_GAIN, 8, 0, 31, 0),
SOC_SINGLE("PCM Capture Switch", AC97_REC_GAIN, 15, 1, 1),

SOC_SINGLE("Mono Playback Volume", AC97_MASTER_MONO, 0, 31, 1),
SOC_SINGLE("Mono Playback Switch", AC97_MASTER_MONO, 15, 1, 1),

SOC_SINGLE("Phone Capture Volume", AC97_PHONE, 0, 31, 1),
SOC_SINGLE("Phone Capture Switch", AC97_PHONE, 15, 1, 1),

SOC_SINGLE("Mic Volume", AC97_MIC, 0, 31, 1),
SOC_SINGLE("Mic Switch", AC97_MIC, 15, 1, 1),

SOC_SINGLE("Stereo Mic Switch", AC97_AD_MISC, 6, 1, 0),
SOC_DOUBLE("Line HP Swap Switch", AC97_AD_MISC, 10, 5, 1, 0),

SOC_DOUBLE("Surround Playback Volume", AC97_SURROUND_MASTER, 8, 0, 31, 1),
SOC_DOUBLE("Surround Playback Switch", AC97_SURROUND_MASTER, 15, 7, 1, 1),

SOC_ENUM("Capture Source", ad1980_cap_src),

SOC_SINGLE("Mic Boost Switch", AC97_MIC, 6, 1, 0),
};

/* add non dapm controls */
static int ad1980_add_controls(struct snd_soc_codec *codec)
{
        int err, i;

        for (i = 0; i < ARRAY_SIZE(ad1980_snd_ac97_controls); i++) {
                err = snd_ctl_add(codec->card, snd_soc_cnew(
                                &ad1980_snd_ac97_controls[i], codec, NULL));
                if (err < 0)
                        return err;
        }
        return 0;
}

static unsigned int ac97_read(struct snd_soc_codec *codec,
        unsigned int reg)
{
        u16 *cache = codec->reg_cache;

        switch (reg) {
        case AC97_RESET:
        case AC97_INT_PAGING:
        case AC97_POWERDOWN:
        case AC97_EXTENDED_STATUS:
        case AC97_VENDOR_ID1:
        case AC97_VENDOR_ID2:
                return soc_ac97_ops.read(codec->ac97, reg);
        default:
                reg = reg >> 1;

                if (reg >= (ARRAY_SIZE(ad1980_reg)))
                        return -EINVAL;

                return cache[reg];
        }
}

static int ac97_write(struct snd_soc_codec *codec, unsigned int reg,
        unsigned int val)
{
        u16 *cache = codec->reg_cache;

        soc_ac97_ops.write(codec->ac97, reg, val);
        reg = reg >> 1;
        if (reg < (ARRAY_SIZE(ad1980_reg)))
                cache[reg] = val;

        return 0;
}

struct snd_soc_dai ad1980_dai = {
        .name = "AC97",
        .playback = {
                .stream_name = "Playback",
                .channels_min = 2,
                .channels_max = 2,
                .rates = SNDRV_PCM_RATE_48000,
                .formats = SNDRV_PCM_FMTBIT_S16_LE, },
        .capture = {
                .stream_name = "Capture",
                .channels_min = 2,
                .channels_max = 2,
                .rates = SNDRV_PCM_RATE_48000,
                .formats = SNDRV_PCM_FMTBIT_S16_LE, },
};
EXPORT_SYMBOL_GPL(ad1980_dai);

static int ad1980_reset(struct snd_soc_codec *codec, int try_warm)
{
        u16 retry_cnt = 0;

retry:
        if (try_warm && soc_ac97_ops.warm_reset) {
                soc_ac97_ops.warm_reset(codec->ac97);
                if (ac97_read(codec, AC97_RESET) == 0x0090)
                        return 1;
        }

        soc_ac97_ops.reset(codec->ac97);
        /* Set bit 16slot in register 74h, then every slot will has only 16
         * bits. This command is sent out in 20bit mode, in which case the
         * first nibble of data is eaten by the addr. (Tag is always 16 bit)*/
        ac97_write(codec, AC97_AD_SERIAL_CFG, 0x9900);

        if (ac97_read(codec, AC97_RESET)  != 0x0090)
                goto err;
        return 0;

err:
        while (retry_cnt++ < 10)
                goto retry;

        printk(KERN_ERR "AD1980 AC97 reset failed\n");
        return -EIO;
}

static int ad1980_soc_probe(struct platform_device *pdev)
{
        struct snd_soc_device *socdev = platform_get_drvdata(pdev);
        struct snd_soc_codec *codec;
        int ret = 0;
        u16 vendor_id2;

        printk(KERN_INFO "AD1980 SoC Audio Codec\n");

        socdev->codec = kzalloc(sizeof(struct snd_soc_codec), GFP_KERNEL);
        if (socdev->codec == NULL)
                return -ENOMEM;
        codec = socdev->codec;
        mutex_init(&codec->mutex);

        codec->reg_cache =
                kzalloc(sizeof(u16) * ARRAY_SIZE(ad1980_reg), GFP_KERNEL);
        if (codec->reg_cache == NULL) {
                ret = -ENOMEM;
                goto cache_err;
        }
        memcpy(codec->reg_cache, ad1980_reg, sizeof(u16) * \
                        ARRAY_SIZE(ad1980_reg));
        codec->reg_cache_size = sizeof(u16) * ARRAY_SIZE(ad1980_reg);
        codec->reg_cache_step = 2;
        codec->name = "AD1980";
        codec->owner = THIS_MODULE;
        codec->dai = &ad1980_dai;
        codec->num_dai = 1;
        codec->write = ac97_write;
        codec->read = ac97_read;
        INIT_LIST_HEAD(&codec->dapm_widgets);
        INIT_LIST_HEAD(&codec->dapm_paths);

        ret = snd_soc_new_ac97_codec(codec, &soc_ac97_ops, 0);
        if (ret < 0) {
                printk(KERN_ERR "ad1980: failed to register AC97 codec\n");
                goto codec_err;
        }

        /* register pcms */
        ret = snd_soc_new_pcms(socdev, SNDRV_DEFAULT_IDX1, SNDRV_DEFAULT_STR1);
        if (ret < 0)
                goto pcm_err;


        ret = ad1980_reset(codec, 0);
        if (ret < 0) {
                printk(KERN_ERR "AC97 link error\n");
                goto reset_err;
        }

        /* Read out vendor ID to make sure it is ad1980 */
        if (ac97_read(codec, AC97_VENDOR_ID1) != 0x4144)
                goto reset_err;

        vendor_id2 = ac97_read(codec, AC97_VENDOR_ID2);

        if (vendor_id2 != 0x5370) {
                if (vendor_id2 != 0x5374)
                        goto reset_err;
                else
                        printk(KERN_WARNING "ad1980: "
                                "Found AD1981 - only 2/2 IN/OUT Channels "
                                "supported\n");
        }

        ac97_write(codec, AC97_MASTER, 0x0000); /* unmute line out volume */
        ac97_write(codec, AC97_PCM, 0x0000);    /* unmute PCM out volume */
        ac97_write(codec, AC97_REC_GAIN, 0x0000);/* unmute record volume */

        ad1980_add_controls(codec);
        ret = snd_soc_register_card(socdev);
        if (ret < 0) {
                printk(KERN_ERR "ad1980: failed to register card\n");
                goto reset_err;
        }

        return 0;

reset_err:
        snd_soc_free_pcms(socdev);

pcm_err:
        snd_soc_free_ac97_codec(codec);

codec_err:
        kfree(codec->reg_cache);

cache_err:
        kfree(socdev->codec);
        socdev->codec = NULL;
        return ret;
}

static int ad1980_soc_remove(struct platform_device *pdev)
{
        struct snd_soc_device *socdev = platform_get_drvdata(pdev);
        struct snd_soc_codec *codec = socdev->codec;

        if (codec == NULL)
                return 0;

        snd_soc_dapm_free(socdev);
        snd_soc_free_pcms(socdev);
        snd_soc_free_ac97_codec(codec);
        kfree(codec->reg_cache);
        kfree(codec);
        return 0;
}

struct snd_soc_codec_device soc_codec_dev_ad1980 = {
        .probe =        ad1980_soc_probe,
        .remove =       ad1980_soc_remove,
};
EXPORT_SYMBOL_GPL(soc_codec_dev_ad1980);

MODULE_DESCRIPTION("ASoC ad1980 driver");
MODULE_AUTHOR("Roy Huang, Cliff Cai");
MODULE_LICENSE("GPL");

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