diff options
Diffstat (limited to 'ANDROID_3.4.5/sound/soc/samsung/smdk_spdif.c')
| -rw-r--r-- | ANDROID_3.4.5/sound/soc/samsung/smdk_spdif.c | 223 |
1 files changed, 0 insertions, 223 deletions
diff --git a/ANDROID_3.4.5/sound/soc/samsung/smdk_spdif.c b/ANDROID_3.4.5/sound/soc/samsung/smdk_spdif.c deleted file mode 100644 index beaa9c15..00000000 --- a/ANDROID_3.4.5/sound/soc/samsung/smdk_spdif.c +++ /dev/null @@ -1,223 +0,0 @@ -/* - * smdk_spdif.c -- S/PDIF audio for SMDK - * - * Copyright 2010 Samsung Electronics Co. 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/clk.h> -#include <linux/module.h> - -#include <sound/soc.h> - -#include "spdif.h" - -/* Audio clock settings are belonged to board specific part. Every - * board can set audio source clock setting which is matched with H/W - * like this function-'set_audio_clock_heirachy'. - */ -static int set_audio_clock_heirachy(struct platform_device *pdev) -{ - struct clk *fout_epll, *mout_epll, *sclk_audio0, *sclk_spdif; - int ret = 0; - - fout_epll = clk_get(NULL, "fout_epll"); - if (IS_ERR(fout_epll)) { - printk(KERN_WARNING "%s: Cannot find fout_epll.\n", - __func__); - return -EINVAL; - } - - mout_epll = clk_get(NULL, "mout_epll"); - if (IS_ERR(mout_epll)) { - printk(KERN_WARNING "%s: Cannot find mout_epll.\n", - __func__); - ret = -EINVAL; - goto out1; - } - - sclk_audio0 = clk_get(&pdev->dev, "sclk_audio"); - if (IS_ERR(sclk_audio0)) { - printk(KERN_WARNING "%s: Cannot find sclk_audio.\n", - __func__); - ret = -EINVAL; - goto out2; - } - - sclk_spdif = clk_get(NULL, "sclk_spdif"); - if (IS_ERR(sclk_spdif)) { - printk(KERN_WARNING "%s: Cannot find sclk_spdif.\n", - __func__); - ret = -EINVAL; - goto out3; - } - - /* Set audio clock hierarchy for S/PDIF */ - clk_set_parent(mout_epll, fout_epll); - clk_set_parent(sclk_audio0, mout_epll); - clk_set_parent(sclk_spdif, sclk_audio0); - - clk_put(sclk_spdif); -out3: - clk_put(sclk_audio0); -out2: - clk_put(mout_epll); -out1: - clk_put(fout_epll); - - return ret; -} - -/* We should haved to set clock directly on this part because of clock - * scheme of Samsudng SoCs did not support to set rates from abstrct - * clock of it's hierarchy. - */ -static int set_audio_clock_rate(unsigned long epll_rate, - unsigned long audio_rate) -{ - struct clk *fout_epll, *sclk_spdif; - - fout_epll = clk_get(NULL, "fout_epll"); - if (IS_ERR(fout_epll)) { - printk(KERN_ERR "%s: failed to get fout_epll\n", __func__); - return -ENOENT; - } - - clk_set_rate(fout_epll, epll_rate); - clk_put(fout_epll); - - sclk_spdif = clk_get(NULL, "sclk_spdif"); - if (IS_ERR(sclk_spdif)) { - printk(KERN_ERR "%s: failed to get sclk_spdif\n", __func__); - return -ENOENT; - } - - clk_set_rate(sclk_spdif, audio_rate); - clk_put(sclk_spdif); - - return 0; -} - -static int smdk_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; - unsigned long pll_out, rclk_rate; - int ret, ratio; - - switch (params_rate(params)) { - case 44100: - pll_out = 45158400; - break; - case 32000: - case 48000: - case 96000: - pll_out = 49152000; - break; - default: - return -EINVAL; - } - - /* Setting ratio to 512fs helps to use S/PDIF with HDMI without - * modify S/PDIF ASoC machine driver. - */ - ratio = 512; - rclk_rate = params_rate(params) * ratio; - - /* Set audio source clock rates */ - ret = set_audio_clock_rate(pll_out, rclk_rate); - if (ret < 0) - return ret; - - /* Set S/PDIF uses internal source clock */ - ret = snd_soc_dai_set_sysclk(cpu_dai, SND_SOC_SPDIF_INT_MCLK, - rclk_rate, SND_SOC_CLOCK_IN); - if (ret < 0) - return ret; - - return ret; -} - -static struct snd_soc_ops smdk_spdif_ops = { - .hw_params = smdk_hw_params, -}; - -static struct snd_soc_dai_link smdk_dai = { - .name = "S/PDIF", - .stream_name = "S/PDIF PCM Playback", - .platform_name = "samsung-audio", - .cpu_dai_name = "samsung-spdif", - .codec_dai_name = "dit-hifi", - .codec_name = "spdif-dit", - .ops = &smdk_spdif_ops, -}; - -static struct snd_soc_card smdk = { - .name = "SMDK-S/PDIF", - .owner = THIS_MODULE, - .dai_link = &smdk_dai, - .num_links = 1, -}; - -static struct platform_device *smdk_snd_spdif_dit_device; -static struct platform_device *smdk_snd_spdif_device; - -static int __init smdk_init(void) -{ - int ret; - - smdk_snd_spdif_dit_device = platform_device_alloc("spdif-dit", -1); - if (!smdk_snd_spdif_dit_device) - return -ENOMEM; - - ret = platform_device_add(smdk_snd_spdif_dit_device); - if (ret) - goto err1; - - smdk_snd_spdif_device = platform_device_alloc("soc-audio", -1); - if (!smdk_snd_spdif_device) { - ret = -ENOMEM; - goto err2; - } - - platform_set_drvdata(smdk_snd_spdif_device, &smdk); - - ret = platform_device_add(smdk_snd_spdif_device); - if (ret) - goto err3; - - /* Set audio clock hierarchy manually */ - ret = set_audio_clock_heirachy(smdk_snd_spdif_device); - if (ret) - goto err4; - - return 0; -err4: - platform_device_del(smdk_snd_spdif_device); -err3: - platform_device_put(smdk_snd_spdif_device); -err2: - platform_device_del(smdk_snd_spdif_dit_device); -err1: - platform_device_put(smdk_snd_spdif_dit_device); - return ret; -} - -static void __exit smdk_exit(void) -{ - platform_device_unregister(smdk_snd_spdif_device); - platform_device_unregister(smdk_snd_spdif_dit_device); -} - -module_init(smdk_init); -module_exit(smdk_exit); - -MODULE_AUTHOR("Seungwhan Youn, <sw.youn@samsung.com>"); -MODULE_DESCRIPTION("ALSA SoC SMDK+S/PDIF"); -MODULE_LICENSE("GPL"); |