diff options
Diffstat (limited to 'sound/soc/samsung/herring-wm8994.c')
| -rw-r--r-- | sound/soc/samsung/herring-wm8994.c | 358 |
1 files changed, 358 insertions, 0 deletions
diff --git a/sound/soc/samsung/herring-wm8994.c b/sound/soc/samsung/herring-wm8994.c new file mode 100644 index 0000000..5f9dfe2 --- /dev/null +++ b/sound/soc/samsung/herring-wm8994.c @@ -0,0 +1,358 @@ +/* + * 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"); |