/*
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* Rockchip machine ASoC driver for Rockchip built-in HDMI and external codec IC
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* which use the same i2s interface
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*
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* Copyright (C) 2017 Fuzhou Rockchip Electronics Co., Ltd
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*
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* Authors: Zhangjun <showy.zhang@rock-chips.com>,
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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*/
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#include <linux/module.h>
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#include <linux/platform_device.h>
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#include <linux/slab.h>
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#include <sound/core.h>
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#include <sound/pcm.h>
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#include <sound/pcm_params.h>
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#include <sound/soc.h>
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#include <sound/soc-dapm.h>
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#include "rockchip_i2s.h"
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#define DRV_NAME "rk-hdmi-analog-sound"
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#define MAX_CODECS 2
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static int rk_hdmi_analog_hw_params(struct snd_pcm_substream *substream,
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struct snd_pcm_hw_params *params)
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{
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int ret = 0;
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struct snd_soc_pcm_runtime *rtd = substream->private_data;
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struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
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struct snd_soc_dai **codec_dais = rtd->codec_dais;
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int mclk;
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unsigned int i;
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switch (params_rate(params)) {
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case 8000:
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case 16000:
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case 24000:
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case 32000:
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case 48000:
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case 64000:
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case 96000:
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mclk = 12288000;
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break;
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case 11025:
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case 22050:
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case 44100:
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case 88200:
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mclk = 11289600;
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break;
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case 176400:
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mclk = 11289600 * 2;
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break;
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case 192000:
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mclk = 12288000 * 2;
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break;
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default:
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return -EINVAL;
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}
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ret = snd_soc_dai_set_sysclk(cpu_dai, 0, mclk,
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SND_SOC_CLOCK_OUT);
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if (ret && ret != -ENOTSUPP) {
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dev_err(cpu_dai->dev, "Can't set cpu clock %d\n", ret);
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return ret;
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}
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for (i = 0; i < rtd->num_codecs; i++) {
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struct snd_soc_dai *codec_dai = codec_dais[i];
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ret = snd_soc_dai_set_sysclk(codec_dai, 0, mclk,
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SND_SOC_CLOCK_IN);
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if (ret && ret != -ENOTSUPP) {
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dev_err(codec_dai->dev,
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"Can't set codec clock %d\n", ret);
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return ret;
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}
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}
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return 0;
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}
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static struct snd_soc_ops rk_ops = {
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.hw_params = rk_hdmi_analog_hw_params,
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};
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static struct snd_soc_dai_link rk_dailink = {
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.name = "HDMI-ANALOG",
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.stream_name = "HDMI-ANALOG",
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.ops = &rk_ops,
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.dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
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SND_SOC_DAIFMT_CBS_CFS,
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};
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static struct snd_soc_card snd_soc_card_rk = {
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.name = "rk-hdmi-analog-snd",
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.dai_link = &rk_dailink,
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.num_links = 1,
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.num_aux_devs = 0,
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};
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static int rk_hdmi_analog_probe(struct platform_device *pdev)
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{
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struct snd_soc_card *card = &snd_soc_card_rk;
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struct device_node *np = pdev->dev.of_node;
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struct snd_soc_dai_link *link = card->dai_link;
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struct snd_soc_dai_link_component *codecs;
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struct of_phandle_args args;
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struct device_node *node;
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int count;
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int ret = 0, i = 0, idx = 0;
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snd_soc_of_parse_card_name(card, "rockchip,model");
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card->dev = &pdev->dev;
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count = of_count_phandle_with_args(np, "rockchip,codec", NULL);
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if (count < 0 || count > MAX_CODECS)
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return -EINVAL;
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/* refine codecs, remove unavailable node */
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for (i = 0; i < count; i++) {
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node = of_parse_phandle(np, "rockchip,codec", i);
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if (!node)
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return -ENODEV;
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if (of_device_is_available(node))
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idx++;
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}
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if (!idx)
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return -ENODEV;
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codecs = devm_kcalloc(&pdev->dev, idx,
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sizeof(*codecs), GFP_KERNEL);
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link->codecs = codecs;
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link->num_codecs = idx;
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idx = 0;
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for (i = 0; i < count; i++) {
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node = of_parse_phandle(np, "rockchip,codec", i);
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if (!node)
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return -ENODEV;
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if (!of_device_is_available(node))
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continue;
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ret = of_parse_phandle_with_fixed_args(np, "rockchip,codec",
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0, i, &args);
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if (ret)
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return ret;
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codecs[idx].of_node = node;
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ret = snd_soc_get_dai_name(&args, &codecs[idx].dai_name);
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if (ret)
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return ret;
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idx++;
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}
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link->cpu_of_node = of_parse_phandle(np, "rockchip,cpu", 0);
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if (!link->cpu_of_node)
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return -ENODEV;
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link->platform_of_node = link->cpu_of_node;
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ret = snd_soc_of_parse_audio_simple_widgets(card, "rockchip,widgets");
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if (ret) {
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dev_err(&pdev->dev,
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"Unable to parse 'rockchip,widget' property\n");
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}
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ret = snd_soc_of_parse_audio_routing(card, "rockchip,routing");
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if (ret) {
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dev_err(&pdev->dev,
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"Unable to parse 'rockchip,routing' property\n");
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}
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ret = devm_snd_soc_register_card(&pdev->dev, card);
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if (ret == -EPROBE_DEFER)
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return -EPROBE_DEFER;
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if (ret) {
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dev_err(&pdev->dev, "card register failed %d\n", ret);
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return ret;
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}
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platform_set_drvdata(pdev, card);
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return ret;
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}
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static const struct of_device_id rockchip_sound_of_match[] = {
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{ .compatible = "rockchip,rk3368-hdmi-analog", },
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{},
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};
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MODULE_DEVICE_TABLE(of, rockchip_sound_of_match);
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static struct platform_driver rockchip_sound_driver = {
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.probe = rk_hdmi_analog_probe,
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.driver = {
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.name = DRV_NAME,
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.pm = &snd_soc_pm_ops,
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.of_match_table = rockchip_sound_of_match,
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},
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};
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module_platform_driver(rockchip_sound_driver);
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MODULE_AUTHOR("Zhangjun <showy.zhang@rock-chips.com>");
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MODULE_DESCRIPTION("Rockchip Built-in HDMI and Codec IC machine ASoC driver");
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MODULE_LICENSE("GPL v2");
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MODULE_ALIAS("platform:" DRV_NAME);
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