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
16static 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
36static 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
43static 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
90static const struct sound_ops samsung_sound_ops = {
91	.setup	= samsung_sound_setup,
92	.play	= samsung_sound_play,
93};
94
95static 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
103U_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