LXR linux/sound/soc/codecs/cq93vc.c

   1/*
   2 * ALSA SoC CQ0093 Voice Codec Driver for DaVinci platforms
   3 *
   4 * Copyright (C) 2010 Texas Instruments, Inc
   5 *
   6 * Author: Miguel Aguilar <miguel.aguilar@ridgerun.com>
   7 *
   8 * This program is free software; you can redistribute it and/or modify
   9 * it under the terms of the GNU General Public License as published by
  10 * the Free Software Foundation; either version 2 of the License, or
  11 * (at your option) any later version.
  12 *
  13 * This program is distributed in the hope that it will be useful,
  14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
  15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  16 * GNU General Public License for more details.
  17 *
  18 * You should have received a copy of the GNU General Public License
  19 * along with this program; if not, write to the Free Software
  20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
  21 */
  22#include <linux/module.h>
  23#include <linux/moduleparam.h>
  24#include <linux/init.h>
  25#include <linux/io.h>
  26#include <linux/delay.h>
  27#include <linux/pm.h>
  28#include <linux/platform_device.h>
  29#include <linux/device.h>
  30#include <linux/slab.h>
  31#include <linux/clk.h>
  32#include <linux/mfd/davinci_voicecodec.h>
  33#include <linux/spi/spi.h>
  34
  35#include <sound/core.h>
  36#include <sound/pcm.h>
  37#include <sound/pcm_params.h>
  38#include <sound/soc.h>
  39#include <sound/initval.h>
  40
  41static const struct snd_kcontrol_new cq93vc_snd_controls[] = {
  42        SOC_SINGLE("PGA Capture Volume", DAVINCI_VC_REG05, 0, 0x03, 0),
  43        SOC_SINGLE("Mono DAC Playback Volume", DAVINCI_VC_REG09, 0, 0x3f, 0),
  44};
  45
  46static int cq93vc_mute(struct snd_soc_dai *dai, int mute)
  47{
  48        struct snd_soc_codec *codec = dai->codec;
  49        u8 reg;
  50
  51        if (mute)
  52                reg = DAVINCI_VC_REG09_MUTE;
  53        else
  54                reg = 0;
  55
  56        snd_soc_update_bits(codec, DAVINCI_VC_REG09, DAVINCI_VC_REG09_MUTE,
  57                            reg);
  58
  59        return 0;
  60}
  61
  62static int cq93vc_set_dai_sysclk(struct snd_soc_dai *codec_dai,
  63                                 int clk_id, unsigned int freq, int dir)
  64{
  65        switch (freq) {
  66        case 22579200:
  67        case 27000000:
  68        case 33868800:
  69                return 0;
  70        }
  71
  72        return -EINVAL;
  73}
  74
  75static int cq93vc_set_bias_level(struct snd_soc_codec *codec,
  76                                enum snd_soc_bias_level level)
  77{
  78        switch (level) {
  79        case SND_SOC_BIAS_ON:
  80                snd_soc_write(codec, DAVINCI_VC_REG12,
  81                             DAVINCI_VC_REG12_POWER_ALL_ON);
  82                break;
  83        case SND_SOC_BIAS_PREPARE:
  84                break;
  85        case SND_SOC_BIAS_STANDBY:
  86                snd_soc_write(codec, DAVINCI_VC_REG12,
  87                             DAVINCI_VC_REG12_POWER_ALL_OFF);
  88                break;
  89        case SND_SOC_BIAS_OFF:
  90                /* force all power off */
  91                snd_soc_write(codec, DAVINCI_VC_REG12,
  92                             DAVINCI_VC_REG12_POWER_ALL_OFF);
  93                break;
  94        }
  95
  96        return 0;
  97}
  98
  99#define CQ93VC_RATES    (SNDRV_PCM_RATE_8000 | SNDRV_PCM_RATE_16000)
 100#define CQ93VC_FORMATS  (SNDRV_PCM_FMTBIT_U8 | SNDRV_PCM_FMTBIT_S16_LE)
 101
 102static const struct snd_soc_dai_ops cq93vc_dai_ops = {
 103        .digital_mute   = cq93vc_mute,
 104        .set_sysclk     = cq93vc_set_dai_sysclk,
 105};
 106
 107static struct snd_soc_dai_driver cq93vc_dai = {
 108        .name = "cq93vc-hifi",
 109        .playback = {
 110                .stream_name = "Playback",
 111                .channels_min = 1,
 112                .channels_max = 2,
 113                .rates = CQ93VC_RATES,
 114                .formats = CQ93VC_FORMATS,},
 115        .capture = {
 116                .stream_name = "Capture",
 117                .channels_min = 1,
 118                .channels_max = 2,
 119                .rates = CQ93VC_RATES,
 120                .formats = CQ93VC_FORMATS,},
 121        .ops = &cq93vc_dai_ops,
 122};
 123
 124static struct regmap *cq93vc_get_regmap(struct device *dev)
 125{
 126        struct davinci_vc *davinci_vc = dev->platform_data;
 127
 128        return davinci_vc->regmap;
 129}
 130
 131static struct snd_soc_codec_driver soc_codec_dev_cq93vc = {
 132        .set_bias_level = cq93vc_set_bias_level,
 133        .get_regmap = cq93vc_get_regmap,
 134        .controls = cq93vc_snd_controls,
 135        .num_controls = ARRAY_SIZE(cq93vc_snd_controls),
 136};
 137
 138static int cq93vc_platform_probe(struct platform_device *pdev)
 139{
 140        return snd_soc_register_codec(&pdev->dev,
 141                        &soc_codec_dev_cq93vc, &cq93vc_dai, 1);
 142}
 143
 144static int cq93vc_platform_remove(struct platform_device *pdev)
 145{
 146        snd_soc_unregister_codec(&pdev->dev);
 147        return 0;
 148}
 149
 150static struct platform_driver cq93vc_codec_driver = {
 151        .driver = {
 152                        .name = "cq93vc-codec",
 153        },
 154
 155        .probe = cq93vc_platform_probe,
 156        .remove = cq93vc_platform_remove,
 157};
 158
 159module_platform_driver(cq93vc_codec_driver);
 160
 161MODULE_DESCRIPTION("Texas Instruments DaVinci ASoC CQ0093 Voice Codec Driver");
 162MODULE_AUTHOR("Miguel Aguilar");
 163MODULE_LICENSE("GPL");
 164