1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright 2018 Google, LLC
4 * Written by Simon Glass <sjg@chromium.org>
5 */
6
7 #include <common.h>
8 #include <audio_codec.h>
9 #include <dm.h>
10 #include <i2s.h>
11 #include <log.h>
12 #include <sound.h>
13 #include <asm/gpio.h>
14 #include <asm/arch/power.h>
15
samsung_sound_setup(struct udevice * dev)16 static int samsung_sound_setup(struct udevice *dev)
17 {
18 struct sound_uc_priv *uc_priv = dev_get_uclass_priv(dev);
19 struct i2s_uc_priv *i2c_priv = dev_get_uclass_priv(uc_priv->i2s);
20 int ret;
21
22 if (uc_priv->setup_done)
23 return -EALREADY;
24 ret = audio_codec_set_params(uc_priv->codec, i2c_priv->id,
25 i2c_priv->samplingrate,
26 i2c_priv->samplingrate * i2c_priv->rfs,
27 i2c_priv->bitspersample,
28 i2c_priv->channels);
29 if (ret)
30 return ret;
31 uc_priv->setup_done = true;
32
33 return 0;
34 }
35
samsung_sound_play(struct udevice * dev,void * data,uint data_size)36 static int samsung_sound_play(struct udevice *dev, void *data, uint data_size)
37 {
38 struct sound_uc_priv *uc_priv = dev_get_uclass_priv(dev);
39
40 return i2s_tx_data(uc_priv->i2s, data, data_size);
41 }
42
samsung_sound_probe(struct udevice * dev)43 static int samsung_sound_probe(struct udevice *dev)
44 {
45 struct sound_uc_priv *uc_priv = dev_get_uclass_priv(dev);
46 struct ofnode_phandle_args args;
47 struct gpio_desc en_gpio;
48 ofnode node;
49 int ret;
50
51 ret = gpio_request_by_name(dev, "codec-enable-gpio", 0, &en_gpio,
52 GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE);
53
54 /* Turn on the GPIO which connects to the codec's "enable" line. */
55 if (!ret)
56 gpio_set_pull(gpio_get_number(&en_gpio), S5P_GPIO_PULL_NONE);
57
58 ret = uclass_get_device_by_phandle(UCLASS_AUDIO_CODEC, dev,
59 "samsung,audio-codec",
60 &uc_priv->codec);
61 if (ret) {
62 debug("Failed to probe audio codec\n");
63 return ret;
64 }
65 node = ofnode_find_subnode(dev_ofnode(dev), "cpu");
66 if (!ofnode_valid(node)) {
67 debug("Failed to find /cpu subnode\n");
68 return -EINVAL;
69 }
70 ret = ofnode_parse_phandle_with_args(node, "sound-dai",
71 "#sound-dai-cells", 0, 0, &args);
72 if (ret) {
73 debug("Cannot find phandle: %d\n", ret);
74 return ret;
75 }
76 ret = uclass_get_device_by_ofnode(UCLASS_I2S, args.node, &uc_priv->i2s);
77 if (ret) {
78 debug("Cannot find i2s: %d\n", ret);
79 return ret;
80 }
81 debug("Probed sound '%s' with codec '%s' and i2s '%s'\n", dev->name,
82 uc_priv->codec->name, uc_priv->i2s->name);
83
84 /* Enable codec clock */
85 set_xclkout();
86
87 return 0;
88 }
89
90 static const struct sound_ops samsung_sound_ops = {
91 .setup = samsung_sound_setup,
92 .play = samsung_sound_play,
93 };
94
95 static const struct udevice_id samsung_sound_ids[] = {
96 { .compatible = "google,snow-audio-max98095" },
97 { .compatible = "google,spring-audio-max98088" },
98 { .compatible = "samsung,smdk5420-audio-wm8994" },
99 { .compatible = "google,peach-audio-max98090" },
100 { }
101 };
102
103 U_BOOT_DRIVER(samsung_sound) = {
104 .name = "samsung_sound",
105 .id = UCLASS_SOUND,
106 .of_match = samsung_sound_ids,
107 .probe = samsung_sound_probe,
108 .ops = &samsung_sound_ops,
109 };
110