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/*
* raumfeld_audio.c -- SoC audio for Raumfeld audio devices
*
* Copyright (c) 2009 Daniel Mack <daniel@caiaq.de>
*
* based on code from:
*
* Wolfson Microelectronics PLC.
* Openedhand Ltd.
* Liam Girdwood <lrg@slimlogic.co.uk>
* Richard Purdie <richard@openedhand.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/module.h>
#include <linux/i2c.h>
#include <linux/delay.h>
#include <linux/gpio.h>
#include <sound/pcm.h>
#include <sound/soc.h>
#include <asm/mach-types.h>
#include "pxa-ssp.h"
#define GPIO_SPDIF_RESET (38)
#define GPIO_MCLK_RESET (111)
#define GPIO_CODEC_RESET (120)
static struct i2c_client *max9486_client;
static struct i2c_board_info max9486_hwmon_info = {
I2C_BOARD_INFO("max9485", 0x63),
};
#define MAX9485_MCLK_FREQ_112896 0x22
#define MAX9485_MCLK_FREQ_122880 0x23
#define MAX9485_MCLK_FREQ_225792 0x32
#define MAX9485_MCLK_FREQ_245760 0x33
static void set_max9485_clk(char clk)
{
i2c_master_send(max9486_client, &clk, 1);
}
static void raumfeld_enable_audio(bool en)
{
if (en) {
gpio_set_value(GPIO_MCLK_RESET, 1);
/* wait some time to let the clocks become stable */
msleep(100);
gpio_set_value(GPIO_SPDIF_RESET, 1);
gpio_set_value(GPIO_CODEC_RESET, 1);
} else {
gpio_set_value(GPIO_MCLK_RESET, 0);
gpio_set_value(GPIO_SPDIF_RESET, 0);
gpio_set_value(GPIO_CODEC_RESET, 0);
}
}
/* CS4270 */
static int raumfeld_cs4270_startup(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *codec_dai = rtd->codec_dai;
/* set freq to 0 to enable all possible codec sample rates */
return snd_soc_dai_set_sysclk(codec_dai, 0, 0, 0);
}
static void raumfeld_cs4270_shutdown(struct snd_pcm_substream *substream)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *codec_dai = rtd->codec_dai;
/* set freq to 0 to enable all possible codec sample rates */
snd_soc_dai_set_sysclk(codec_dai, 0, 0, 0);
}
static int raumfeld_cs4270_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *codec_dai = rtd->codec_dai;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
unsigned int fmt, clk = 0;
int ret = 0;
switch (params_rate(params)) {
case 44100:
set_max9485_clk(MAX9485_MCLK_FREQ_112896);
clk = 11289600;
break;
case 48000:
set_max9485_clk(MAX9485_MCLK_FREQ_122880);
clk = 12288000;
break;
case 88200:
set_max9485_clk(MAX9485_MCLK_FREQ_225792);
clk = 22579200;
break;
case 96000:
set_max9485_clk(MAX9485_MCLK_FREQ_245760);
clk = 24576000;
break;
default:
return -EINVAL;
}
fmt = SND_SOC_DAIFMT_I2S |
SND_SOC_DAIFMT_NB_NF |
SND_SOC_DAIFMT_CBS_CFS;
/* setup the CODEC DAI */
ret = snd_soc_dai_set_fmt(codec_dai, fmt);
if (ret < 0)
return ret;
ret = snd_soc_dai_set_sysclk(codec_dai, 0, clk, 0);
if (ret < 0)
return ret;
/* setup the CPU DAI */
ret = snd_soc_dai_set_pll(cpu_dai, 0, 0, 0, clk);
if (ret < 0)
return ret;
ret = snd_soc_dai_set_fmt(cpu_dai, fmt);
if (ret < 0)
return ret;
ret = snd_soc_dai_set_clkdiv(cpu_dai, PXA_SSP_DIV_SCR, 4);
if (ret < 0)
return ret;
ret = snd_soc_dai_set_sysclk(cpu_dai, PXA_SSP_CLK_EXT, clk, 1);
if (ret < 0)
return ret;
return 0;
}
static struct snd_soc_ops raumfeld_cs4270_ops = {
.startup = raumfeld_cs4270_startup,
.shutdown = raumfeld_cs4270_shutdown,
.hw_params = raumfeld_cs4270_hw_params,
};
static int raumfeld_line_suspend(struct platform_device *pdev, pm_message_t state)
{
raumfeld_enable_audio(false);
return 0;
}
static int raumfeld_line_resume(struct platform_device *pdev)
{
raumfeld_enable_audio(true);
return 0;
}
/* AK4104 */
static int raumfeld_ak4104_hw_params(struct snd_pcm_substream *substream,
struct snd_pcm_hw_params *params)
{
struct snd_soc_pcm_runtime *rtd = substream->private_data;
struct snd_soc_dai *codec_dai = rtd->codec_dai;
struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
int fmt, ret = 0, clk = 0;
switch (params_rate(params)) {
case 44100:
set_max9485_clk(MAX9485_MCLK_FREQ_112896);
clk = 11289600;
break;
case 48000:
set_max9485_clk(MAX9485_MCLK_FREQ_122880);
clk = 12288000;
break;
case 88200:
set_max9485_clk(MAX9485_MCLK_FREQ_225792);
clk = 22579200;
break;
case 96000:
set_max9485_clk(MAX9485_MCLK_FREQ_245760);
clk = 24576000;
break;
default:
return -EINVAL;
}
fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF;
/* setup the CODEC DAI */
ret = snd_soc_dai_set_fmt(codec_dai, fmt | SND_SOC_DAIFMT_CBS_CFS);
if (ret < 0)
return ret;
/* setup the CPU DAI */
ret = snd_soc_dai_set_pll(cpu_dai, 0, 0, 0, clk);
if (ret < 0)
return ret;
ret = snd_soc_dai_set_fmt(cpu_dai, fmt | SND_SOC_DAIFMT_CBS_CFS);
if (ret < 0)
return ret;
ret = snd_soc_dai_set_clkdiv(cpu_dai, PXA_SSP_DIV_SCR, 4);
if (ret < 0)
return ret;
ret = snd_soc_dai_set_sysclk(cpu_dai, PXA_SSP_CLK_EXT, clk, 1);
if (ret < 0)
return ret;
return 0;
}
static struct snd_soc_ops raumfeld_ak4104_ops = {
.hw_params = raumfeld_ak4104_hw_params,
};
static struct snd_soc_dai_link raumfeld_dai[] = {
{
.name = "ak4104",
.stream_name = "Playback",
.cpu_dai_name = "pxa-ssp-dai.1",
.codec_dai_name = "ak4104-hifi",
.platform_name = "pxa-pcm-audio",
.ops = &raumfeld_ak4104_ops,
.codec_name = "ak4104-codec.0",
},
{
.name = "CS4270",
.stream_name = "CS4270",
.cpu_dai_name = "pxa-ssp-dai.0",
.platform_name = "pxa-pcm-audio",
.codec_dai_name = "cs4270-hifi",
.codec_name = "cs4270-codec.0-0048",
.ops = &raumfeld_cs4270_ops,
},};
static struct snd_soc_card snd_soc_raumfeld = {
.name = "Raumfeld",
.dai_link = raumfeld_dai,
.suspend_post = raumfeld_line_suspend,
.resume_pre = raumfeld_line_resume,
.num_links = ARRAY_SIZE(raumfeld_dai),
};
static struct platform_device *raumfeld_audio_device;
static int __init raumfeld_audio_init(void)
{
int ret;
if (!machine_is_raumfeld_speaker() &&
!machine_is_raumfeld_connector())
return 0;
max9486_client = i2c_new_device(i2c_get_adapter(0),
&max9486_hwmon_info);
if (!max9486_client)
return -ENOMEM;
set_max9485_clk(MAX9485_MCLK_FREQ_122880);
/* Register LINE and SPDIF */
raumfeld_audio_device = platform_device_alloc("soc-audio", 0);
if (!raumfeld_audio_device)
return -ENOMEM;
platform_set_drvdata(raumfeld_audio_device,
&snd_soc_raumfeld);
ret = platform_device_add(raumfeld_audio_device);
/* no S/PDIF on Speakers */
if (machine_is_raumfeld_speaker())
return ret;
raumfeld_enable_audio(true);
return ret;
}
static void __exit raumfeld_audio_exit(void)
{
raumfeld_enable_audio(false);
platform_device_unregister(raumfeld_audio_device);
i2c_unregister_device(max9486_client);
gpio_free(GPIO_MCLK_RESET);
gpio_free(GPIO_CODEC_RESET);
gpio_free(GPIO_SPDIF_RESET);
}
module_init(raumfeld_audio_init);
module_exit(raumfeld_audio_exit);
/* Module information */
MODULE_AUTHOR("Daniel Mack <daniel@caiaq.de>");
MODULE_DESCRIPTION("Raumfeld audio SoC");
MODULE_LICENSE("GPL");
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