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