1 /*$_FOR_ROCKCHIP_RBOX_$*/
2 /*$_rbox_$_modify_$_huangzhibao for spdif output*/
5 * smdk_spdif.c -- S/PDIF audio for SMDK
7 * Copyright 2010 Samsung Electronics Co. Ltd.
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License as
11 * published by the Free Software Foundation; either version 2 of the
12 * License, or (at your option) any later version.
16 #include <linux/module.h>
17 #include <linux/device.h>
19 #include <linux/of_gpio.h>
20 #include <linux/clk.h>
21 #include <sound/core.h>
22 #include <sound/pcm.h>
23 #include <sound/soc.h>
24 #include <sound/soc-dapm.h>
26 #include "card_info.h"
31 #define RK_SPDIF_DBG(x...) printk(KERN_INFO "rk_hdmi_spdif:"x)
33 #define RK_SPDIF_DBG(x...) do { } while (0)
37 static int set_audio_clock_rate(unsigned long pll_rate,
38 unsigned long audio_rate)
40 struct clk *hclk_spdif, *sclk_spdif;
42 #if defined (CONFIG_ARCH_RK30) || (CONFIG_ARCH_RK3188)
43 hclk_spdif = clk_get(NULL, "hclk_spdif");
44 if (IS_ERR(hclk_spdif)) {
45 printk(KERN_ERR "spdif:failed to get hclk_spdif\n");
49 clk_set_rate(hclk_spdif, pll_rate);
53 sclk_spdif = clk_get(NULL, "spdif");
54 if (IS_ERR(sclk_spdif)) {
55 printk(KERN_ERR "spdif:failed to get sclk_spdif\n");
59 clk_set_rate(sclk_spdif, audio_rate);
65 static int rk_hw_params(struct snd_pcm_substream *substream,
66 struct snd_pcm_hw_params *params)
68 struct snd_soc_pcm_runtime *rtd = substream->private_data;
69 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
70 struct snd_soc_dai *codec_dai = rtd->codec_dai;
71 unsigned long pll_out, rclk_rate, dai_fmt = rtd->dai_link->dai_fmt;
74 RK_SPDIF_DBG("spdif:Entered %s\n", __func__);
78 /* set codec DAI configuration */
79 ret = snd_soc_dai_set_fmt(codec_dai, dai_fmt);
81 printk("%s():failed to set the format for codec side\n", __func__);
85 /* set cpu DAI configuration */
86 ret = snd_soc_dai_set_fmt(cpu_dai, dai_fmt);
88 printk("%s():failed to set the format for cpu side\n", __func__);
92 switch (params_rate(params)) {
106 printk("rk_spdif: params not support\n");
111 rclk_rate = params_rate(params) * ratio;
113 /* Set audio source clock rates */
114 ret = set_audio_clock_rate(pll_out, rclk_rate);
118 /* Set S/PDIF uses internal source clock */
119 //ret = snd_soc_dai_set_sysclk(cpu_dai, SND_SOC_SPDIF_INT_MCLK,
120 //rclk_rate, SND_SOC_CLOCK_IN);
127 static struct snd_soc_ops rk_spdif_ops = {
128 .hw_params = rk_hw_params,
131 static struct snd_soc_dai_link rk_dai = {
133 .stream_name = "SPDIF PCM Playback",
134 .cpu_dai_name = "rockchip-spdif",
135 .codec_dai_name = "rk-hdmi-spdif-hifi",
136 .codec_name = "hdmi-spdif",
137 .ops = &rk_spdif_ops,
140 static struct snd_soc_card rockchip_hdmi_spdif_snd_card = {
141 .name = "RK-HDMI-SPDIF",
146 static int rockchip_hdmi_spdif_audio_probe(struct platform_device *pdev)
149 struct snd_soc_card *card = &rockchip_hdmi_spdif_snd_card;
151 card->dev = &pdev->dev;
153 ret = rockchip_of_get_sound_card_info(card);
155 printk("%s() get sound card info failed:%d\n", __FUNCTION__, ret);
159 ret = snd_soc_register_card(card);
162 printk("%s() register card failed:%d\n", __FUNCTION__, ret);
167 static int rockchip_hdmi_spdif_audio_remove(struct platform_device *pdev)
169 struct snd_soc_card *card = platform_get_drvdata(pdev);
171 snd_soc_unregister_card(card);
177 static const struct of_device_id rockchip_hdmi_spdif_of_match[] = {
178 { .compatible = "rockchip-hdmi-spdif"},
181 MODULE_DEVICE_TABLE(of, rockchip_hdmi_spdif_of_match);
182 #endif /* CONFIG_OF */
184 static struct platform_driver rockchip_hdmi_spdif_audio_driver = {
186 .name = "rockchip-hdmi-spdif",
187 .owner = THIS_MODULE,
188 .of_match_table = of_match_ptr(rockchip_hdmi_spdif_of_match),
190 .probe = rockchip_hdmi_spdif_audio_probe,
191 .remove = rockchip_hdmi_spdif_audio_remove,
194 module_platform_driver(rockchip_hdmi_spdif_audio_driver);
196 MODULE_AUTHOR("hzb, <hzb@rock-chips.com>");
197 MODULE_DESCRIPTION("ALSA SoC RK+S/PDIF");
198 MODULE_LICENSE("GPL");