1 /*
2 * Rockchip machine ASoC driver for boards using CDN DP
3 *
4 * Copyright (c) 2016, ROCKCHIP CORPORATION. All rights reserved.
5 *
6 * This program is free software; you can redistribute it and/or modify it
7 * under the terms and conditions of the GNU General Public License,
8 * version 2, as published by the Free Software Foundation.
9 *
10 * This program is distributed in the hope it will be useful, but WITHOUT
11 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
12 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
13 * more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program. If not, see <http://www.gnu.org/licenses/>.
17 */
18
19 #include <linux/module.h>
20 #include <linux/input.h>
21 #include <sound/jack.h>
22 #include <sound/hdmi-codec.h>
23 #include <sound/soc.h>
24
25 #define DRV_NAME "rockchip-cdndp-sound"
26
rockchip_sound_cdndp_hw_params(struct snd_pcm_substream * substream,struct snd_pcm_hw_params * params)27 static int rockchip_sound_cdndp_hw_params(struct snd_pcm_substream *substream,
28 struct snd_pcm_hw_params *params)
29 {
30 struct snd_soc_pcm_runtime *rtd = substream->private_data;
31 struct snd_soc_dai *cpu_dai = rtd->cpu_dai;
32 int mclk, ret;
33
34 /* in bypass mode, the mclk has to be one of the frequencies below */
35 switch (params_rate(params)) {
36 case 8000:
37 case 16000:
38 case 24000:
39 case 32000:
40 case 48000:
41 case 64000:
42 case 96000:
43 mclk = 12288000;
44 break;
45 case 11025:
46 case 22050:
47 case 44100:
48 case 88200:
49 mclk = 11289600;
50 break;
51 case 176400:
52 mclk = 11289600 * 2;
53 break;
54 case 192000:
55 mclk = 12288000 * 2;
56 break;
57 default:
58 return -EINVAL;
59 }
60
61 ret = snd_soc_dai_set_sysclk(cpu_dai, 0, mclk,
62 SND_SOC_CLOCK_OUT);
63 if (ret && ret != -ENOTSUPP) {
64 dev_err(cpu_dai->dev, "Can't set cpu clock %d\n", ret);
65 return ret;
66 }
67
68 return 0;
69 }
70
71 static struct snd_soc_jack cdn_dp_card_jack;
72
rockchip_sound_cdndp_init(struct snd_soc_pcm_runtime * runtime)73 static int rockchip_sound_cdndp_init(struct snd_soc_pcm_runtime *runtime)
74 {
75 struct snd_soc_card *card = runtime->card;
76 struct snd_soc_codec *codec = runtime->codec;
77 int ret;
78
79 /* enable jack detection */
80 ret = snd_soc_card_jack_new(card, "DP Jack", SND_JACK_LINEOUT,
81 &cdn_dp_card_jack, NULL, 0);
82 if (ret) {
83 dev_err(card->dev, "Can't create DP Jack %d\n", ret);
84 return ret;
85 }
86
87 return hdmi_codec_set_jack_detect(codec, &cdn_dp_card_jack);
88 }
89
90 static struct snd_soc_ops rockchip_sound_cdndp_ops = {
91 .hw_params = rockchip_sound_cdndp_hw_params,
92 };
93
94 static struct snd_soc_dai_link cdndp_dailink = {
95 .name = "DP",
96 .stream_name = "DP PCM",
97 .codec_dai_name = "spdif-hifi",
98 .init = rockchip_sound_cdndp_init,
99 .ops = &rockchip_sound_cdndp_ops,
100 .dai_fmt = SND_SOC_DAIFMT_I2S | SND_SOC_DAIFMT_NB_NF |
101 SND_SOC_DAIFMT_CBS_CFS,
102 };
103
104 static struct snd_soc_card rockchip_sound_card = {
105 .name = "rockchip-cdndp-sound",
106 .owner = THIS_MODULE,
107 .dai_link = &cdndp_dailink,
108 .num_links = 1,
109 };
110
rockchip_sound_probe(struct platform_device * pdev)111 static int rockchip_sound_probe(struct platform_device *pdev)
112 {
113 struct snd_soc_card *card = &rockchip_sound_card;
114 struct device_node *cpu_node;
115 int ret;
116
117 cpu_node = of_parse_phandle(pdev->dev.of_node, "rockchip,cpu", 0);
118 if (!cpu_node) {
119 dev_err(&pdev->dev, "Property 'rockchip,cpu' missing or invalid\n");
120 return -EINVAL;
121 }
122
123 cdndp_dailink.platform_of_node = cpu_node;
124 cdndp_dailink.cpu_of_node = cpu_node;
125
126 cdndp_dailink.codec_of_node = of_parse_phandle(pdev->dev.of_node,
127 "rockchip,codec", 0);
128 if (!cdndp_dailink.codec_of_node) {
129 dev_err(&pdev->dev, "Property 'rockchip,codec' invalid\n");
130 return -EINVAL;
131 }
132
133 card->dev = &pdev->dev;
134 platform_set_drvdata(pdev, card);
135
136 ret = devm_snd_soc_register_card(&pdev->dev, card);
137 if (ret)
138 dev_err(&pdev->dev, "%s snd_soc_register_card fail %d\n",
139 __func__, ret);
140
141 return ret;
142 }
143
144 static const struct of_device_id rockchip_sound_of_match[] = {
145 { .compatible = "rockchip,cdndp-sound", },
146 {},
147 };
148
149 static struct platform_driver rockchip_sound_driver = {
150 .probe = rockchip_sound_probe,
151 .driver = {
152 .name = DRV_NAME,
153 .of_match_table = rockchip_sound_of_match,
154 #ifdef CONFIG_PM
155 .pm = &snd_soc_pm_ops,
156 #endif
157 },
158 };
159
160 module_platform_driver(rockchip_sound_driver);
161
162 MODULE_AUTHOR("Chris Zhong <zyw@rock-chips.com>");
163 MODULE_DESCRIPTION("Rockchip CDN DP Machine Driver");
164 MODULE_LICENSE("GPL v2");
165 MODULE_ALIAS("platform:" DRV_NAME);
166 MODULE_DEVICE_TABLE(of, rockchip_sound_of_match);
167