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/*
* crespo_wm8994.c
*
* Copyright (C) 2010, Samsung Elect. Ltd. -
*
* 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/platform_device.h>
#include <linux/clk.h>
#include <sound/core.h>
#include <sound/pcm.h>
#include <sound/pcm_params.h>
#include <sound/soc.h>
#include <sound/soc-dapm.h>
#include <mach/regs-clock.h>
#include <plat/regs-iis.h>
#include "../codecs/wm8994.h"
#include "s3c-dma.h"
#include "s5pc1xx-i2s.h"
//#include "s3c-i2s-v2.h"
#include <linux/io.h>
#define I2S_NUM 0
#define SRC_CLK 66738000
/* #define CONFIG_SND_DEBUG */
#ifdef CONFIG_SND_DEBUG
#define debug_msg(x...) printk(x)
#else
#define debug_msg(x...)
#endif
/* BLC(bits-per-channel) --> BFS(bit clock shud be >= FS*(Bit-per-channel)*2)*/
/* BFS --> RFS(must be a multiple of BFS) */
/* RFS & SRC_CLK --> Prescalar Value(SRC_CLK / RFS_VAL / fs - 1) */
int smdkc110_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 *cpu_dai = rtd->cpu_dai;
struct snd_soc_dai *codec_dai = rtd->codec_dai;
int bfs, rfs, ret;
u32 ap_codec_clk;
#ifndef CONFIG_SND_S5P_WM8994_MASTER
struct clk *clk_out, *clk_epll;
int psr;
#endif
debug_msg("%s\n", __func__);
/* Choose BFS and RFS values combination that is supported by
* both the WM8994 codec as well as the S5P AP
*
*/
switch (params_format(params)) {
case SNDRV_PCM_FORMAT_S8:
/* Can take any RFS value for AP */
bfs = 16;
rfs = 256;
break;
case SNDRV_PCM_FORMAT_S16_LE:
/* Can take any RFS value for AP */
bfs = 32;
rfs = 256;
break;
case SNDRV_PCM_FORMAT_S20_3LE:
case SNDRV_PCM_FORMAT_S24_LE:
bfs = 48;
rfs = 512;
break;
/* Impossible, as the AP doesn't support 64fs or more BFS */
case SNDRV_PCM_FORMAT_S32_LE:
default:
return -EINVAL;
}
#ifdef CONFIG_SND_S5P_WM8994_MASTER
/* Set the Codec DAI configuration */
ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
if (ret < 0) {
printk(KERN_ERR "smdkc110_wm8994_hw_params :\
Codec DAI configuration error!\n");
return ret;
}
/* Set the AP DAI configuration */
ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBM_CFM);
if (ret < 0) {
printk(KERN_ERR
"smdkc110_wm8994_hw_params :\
AP DAI configuration error!\n");
return ret;
}
/* Select the AP Sysclk */
ret = snd_soc_dai_set_sysclk(cpu_dai, S3C64XX_CDCLKSRC_EXT,
params_rate(params), SND_SOC_CLOCK_IN);
if (ret < 0) {
printk(KERN_ERR
"smdkc110_wm8994_hw_params :\
AP sys clock INT setting error!\n");
return ret;
}
ret = snd_soc_dai_set_sysclk(cpu_dai, S3C64XX_CLKSRC_I2SEXT,
params_rate(params), SND_SOC_CLOCK_IN);
if (ret < 0) {
printk(KERN_ERR
"smdkc110_wm8994_hw_params :\
AP sys clock I2SEXT setting error!\n");
return ret;
}
switch (params_rate(params)) {
case 8000:
ap_codec_clk = 4096000;
break;
case 11025:
ap_codec_clk = 2822400;
break;
case 12000:
ap_codec_clk = 6144000;
break;
case 16000:
ap_codec_clk = 4096000;
break;
case 22050:
ap_codec_clk = 6144000;
break;
case 24000:
ap_codec_clk = 6144000;
break;
case 32000:
ap_codec_clk = 8192000;
break;
case 44100:
ap_codec_clk = 11289600;
break;
case 48000:
ap_codec_clk = 12288000;
break;
default:
ap_codec_clk = 11289600;
break;
}
ret = snd_soc_dai_set_sysclk(codec_dai, WM8994_SYSCLK_FLL,
ap_codec_clk, 0);
if (ret < 0)
return ret;
#else
ret = snd_soc_dai_set_fmt(codec_dai, SND_SOC_DAIFMT_I2S |
SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
if (ret < 0)
return ret;
ret = snd_soc_dai_set_fmt(cpu_dai, SND_SOC_DAIFMT_I2S |
SND_SOC_DAIFMT_NB_NF | SND_SOC_DAIFMT_CBS_CFS);
if (ret < 0)
return ret;
ret = snd_soc_dai_set_sysclk(cpu_dai, S3C64XX_CLKSRC_CDCLK,
params_rate(params), SND_SOC_CLOCK_OUT);
if (ret < 0)
return ret;
#ifdef USE_CLKAUDIO
ret = snd_soc_dai_set_sysclk(cpu_dai, S3C_CLKSRC_CLKAUDIO,
params_rate(params), SND_SOC_CLOCK_OUT);
if (ret < 0) {
printk(KERN_ERR
"smdkc110_wm8994_hw_params : \
AP sys clock setting error!\n");
return ret;
}
#endif
clk_out = clk_get(NULL, "clk_out");
if (IS_ERR(clk_out)) {
printk(KERN_ERR
"failed to get CLK_OUT\n");
return -EBUSY;
}
clk_epll = clk_get(NULL, "fout_epll");
if (IS_ERR(clk_epll)) {
printk(KERN_ERR
"failed to get fout_epll\n");
clk_put(clk_out);
return -EBUSY;
}
if (clk_set_parent(clk_out, clk_epll)) {
printk(KERN_ERR
"failed to set CLK_EPLL as parent of CLK_OUT\n");
clk_put(clk_out);
clk_put(clk_epll);
return -EBUSY;
}
switch (params_rate(params)) {
case 8000:
case 16000:
case 32000:
case 48000:
case 64000:
case 96000:
clk_set_rate(clk_out, 12288000);
ap_codec_clk = SRC_CLK/4;
break;
case 11025:
case 22050:
case 44100:
case 88200:
default:
clk_set_rate(clk_out, 11289600);
ap_codec_clk = SRC_CLK/6;
break;
}
ret = snd_soc_dai_set_sysclk(codec_dai, WM8994_SYSCLK_MCLK,
ap_codec_clk, 0);
if (ret < 0) {
printk(KERN_ERR
"smdkc110_wm8994_hw_params : \
Codec sys clock setting error!\n");
return ret;
}
/* Calculate Prescalare/PLL values for supported Rates */
psr = SRC_CLK / rfs / params_rate(params);
ret = SRC_CLK / rfs - psr * params_rate(params);
/* round off */
if (ret >= params_rate(params)/2)
psr += 1;
psr -= 1;
printk(KERN_INFO
"SRC_CLK=%d PSR=%d RFS=%d BFS=%d\n", SRC_CLK, psr, rfs, bfs);
/* Set the AP Prescalar/Pll */
ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C_I2SV2_DIV_PRESCALER, psr);
if (ret < 0) {
printk(KERN_ERR
"smdkc110_wm8994_hw_params :\
AP prescalar setting error!\n");
return ret;
}
/* Set the AP RFS */
ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C_I2SV2_DIV_RCLK, rfs);
if (ret < 0) {
printk(KERN_ERR
"smdkc110_wm8994_hw_params : AP RFS setting error!\n");
return ret;
}
/* Set the AP BFS */
ret = snd_soc_dai_set_clkdiv(cpu_dai, S3C_I2SV2_DIV_BCLK, bfs);
if (ret < 0) {
printk(KERN_ERR
"smdkc110_wm8994_hw_params : AP BCLK setting error!\n");
return ret;
}
clk_put(clk_epll);
clk_put(clk_out);
#endif
return 0;
}
/* machine stream operations */
static struct snd_soc_ops smdkc110_ops = {
.hw_params = smdkc110_hw_params,
};
/* digital audio interface glue - connects codec <--> CPU */
static struct snd_soc_dai_link smdkc1xx_dai = {
.name = "herring",
.stream_name = "WM8994 HiFi Playback",
.cpu_dai_name = "samsung-i2s.0",
.codec_dai_name = "WM8994 PAIFRX",
.platform_name = "samsung-audio",
.codec_name = "wm8994-samsung-codec.4-001a",
.ops = &smdkc110_ops,
};
static struct snd_soc_card smdkc100 = {
.name = "smdkc110",
.dai_link = &smdkc1xx_dai,
.num_links = 1,
};
#if 0
static struct wm8994_setup_data smdkc110_wm8994_setup = {
/*
The I2C address of the WM89940 is 0x34. To the I2C driver
the address is a 7-bit number hence the right shift .
*/
.i2c_address = 0x34,
.i2c_bus = 4,
};
/* audio subsystem */
static struct snd_soc_device smdkc1xx_snd_devdata = {
.card = &smdkc100,
.codec_dev = &soc_codec_dev_wm8994,
.codec_data = &smdkc110_wm8994_setup,
};
#endif
static struct platform_device *smdkc1xx_snd_device;
static int __init smdkc110_audio_init(void)
{
int ret;
debug_msg("%s\n", __func__);
smdkc1xx_snd_device = platform_device_alloc("soc-audio", 0);
if (!smdkc1xx_snd_device)
return -ENOMEM;
platform_set_drvdata(smdkc1xx_snd_device, &smdkc100);
ret = platform_device_add(smdkc1xx_snd_device);
if (ret)
platform_device_put(smdkc1xx_snd_device);
return ret;
}
static void __exit smdkc110_audio_exit(void)
{
debug_msg("%s\n", __func__);
platform_device_unregister(smdkc1xx_snd_device);
}
module_init(smdkc110_audio_init);
module_exit(smdkc110_audio_exit);
/* Module information */
MODULE_DESCRIPTION("ALSA SoC SMDKC110 WM8994");
MODULE_LICENSE("GPL");
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