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gerrit.devboardsforandroid.linaro.org / platform / external / u-boot / e2932310a58a3d2b2303024385401218078d5dc5 / . / drivers / sound / samsung_sound.c
blob: 1d711c8732201a94254a77917f89cf50f2ebd96c [file] [log] [blame]
Simon Glassd6cadd52018-12-10 10:37:39 -0700[diff] [blame]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
14static int samsung_sound_setup(struct udevice *dev)
15{
16 struct sound_uc_priv *uc_priv = dev_get_uclass_priv(dev);
17 struct i2s_uc_priv *i2c_priv = dev_get_uclass_priv(uc_priv->i2s);
18 int ret;
19
20 if (uc_priv->setup_done)
21 return -EALREADY;
22 ret = audio_codec_set_params(uc_priv->codec, i2c_priv->id,
23 i2c_priv->samplingrate,
24 i2c_priv->samplingrate * i2c_priv->rfs,
25 i2c_priv->bitspersample,
26 i2c_priv->channels);
27 if (ret)
28 return ret;
29 uc_priv->setup_done = true;
30
31 return 0;
32}
33
34static int samsung_sound_play(struct udevice *dev, void *data, uint data_size)
35{
36 struct sound_uc_priv *uc_priv = dev_get_uclass_priv(dev);
37
38 return i2s_tx_data(uc_priv->i2s, data, data_size);
39}
40
41static int samsung_sound_probe(struct udevice *dev)
42{
43 struct sound_uc_priv *uc_priv = dev_get_uclass_priv(dev);
44 struct ofnode_phandle_args args;
45 struct gpio_desc en_gpio;
46 ofnode node;
47 int ret;
48
49 ret = gpio_request_by_name(dev, "codec-enable-gpio", 0, &en_gpio,
50 GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE);
51
52 /* Turn on the GPIO which connects to the codec's "enable" line. */
53 if (!ret)
54 gpio_set_pull(gpio_get_number(&en_gpio), S5P_GPIO_PULL_NONE);
55
56 ret = uclass_get_device_by_phandle(UCLASS_AUDIO_CODEC, dev,
57 "samsung,audio-codec",
58 &uc_priv->codec);
59 if (ret) {
60 debug("Failed to probe audio codec\n");
61 return ret;
62 }
63 node = ofnode_find_subnode(dev_ofnode(dev), "cpu");
64 if (!ofnode_valid(node)) {
65 debug("Failed to find /cpu subnode\n");
66 return -EINVAL;
67 }
68 ret = ofnode_parse_phandle_with_args(node, "sound-dai",
69 "#sound-dai-cells", 0, 0, &args);
70 if (ret) {
71 debug("Cannot find phandle: %d\n", ret);
72 return ret;
73 }
74 ret = uclass_get_device_by_ofnode(UCLASS_I2S, args.node, &uc_priv->i2s);
75 if (ret) {
76 debug("Cannot find i2s: %d\n", ret);
77 return ret;
78 }
79 debug("Probed sound '%s' with codec '%s' and i2s '%s'\n", dev->name,
80 uc_priv->codec->name, uc_priv->i2s->name);
81
82 return 0;
83}
84
85static const struct sound_ops samsung_sound_ops = {
86 .setup = samsung_sound_setup,
87 .play = samsung_sound_play,
88};
89
90static const struct udevice_id samsung_sound_ids[] = {
91 { .compatible = "google,snow-audio-max98095" },
Simon Glass93a98a62018-12-10 10:37:44 -0700[diff] [blame]92 { .compatible = "google,spring-audio-max98095" },
93 { .compatible = "samsung,smdk5420-audio-wm8994" },
94 { .compatible = "google,peach-audio-max98090" },
Simon Glassd6cadd52018-12-10 10:37:39 -0700[diff] [blame]95 { }
96};
97
98U_BOOT_DRIVER(samsung_sound) = {
99 .name = "samsung_sound",
100 .id = UCLASS_SOUND,
101 .of_match = samsung_sound_ids,
102 .probe = samsung_sound_probe,
103 .ops = &samsung_sound_ops,
104};