1 // SPDX-License-Identifier: GPL-2.0+
2 /*
3 * Copyright 2018 Google, LLC
4 * Written by Simon Glass <sjg@chromium.org>
5 */
6
7 #define LOG_CATEGORY UCLASS_I2S
8
9 #include <common.h>
10 #include <audio_codec.h>
11 #include <dm.h>
12 #include <i2s.h>
13 #include <log.h>
14 #include <misc.h>
15 #include <sound.h>
16 #include <asm/gpio.h>
17 #include "tegra_i2s_priv.h"
18
tegra_sound_setup(struct udevice * dev)19 static int tegra_sound_setup(struct udevice *dev)
20 {
21 struct sound_uc_priv *uc_priv = dev_get_uclass_priv(dev);
22 struct i2s_uc_priv *i2c_priv = dev_get_uclass_priv(uc_priv->i2s);
23 int ret;
24
25 if (uc_priv->setup_done)
26 return -EALREADY;
27 ret = audio_codec_set_params(uc_priv->codec, i2c_priv->id,
28 i2c_priv->samplingrate,
29 i2c_priv->samplingrate * i2c_priv->rfs,
30 i2c_priv->bitspersample,
31 i2c_priv->channels);
32 if (ret)
33 return ret;
34 uc_priv->setup_done = true;
35
36 return 0;
37 }
38
tegra_sound_play(struct udevice * dev,void * data,uint data_size)39 static int tegra_sound_play(struct udevice *dev, void *data, uint data_size)
40 {
41 struct sound_uc_priv *uc_priv = dev_get_uclass_priv(dev);
42
43 return i2s_tx_data(uc_priv->i2s, data, data_size);
44 }
45
tegra_sound_probe(struct udevice * dev)46 static int tegra_sound_probe(struct udevice *dev)
47 {
48 struct sound_uc_priv *uc_priv = dev_get_uclass_priv(dev);
49 struct gpio_desc en_gpio;
50 struct udevice *ahub;
51 int ret;
52
53 ret = gpio_request_by_name(dev, "codec-enable-gpio", 0, &en_gpio,
54 GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE);
55
56 ret = uclass_get_device_by_phandle(UCLASS_AUDIO_CODEC, dev,
57 "nvidia,audio-codec",
58 &uc_priv->codec);
59 if (ret) {
60 log_debug("Failed to probe audio codec\n");
61 return ret;
62 }
63 ret = uclass_get_device_by_phandle(UCLASS_I2S, dev,
64 "nvidia,i2s-controller",
65 &uc_priv->i2s);
66 if (ret) {
67 log_debug("Cannot find i2s: %d\n", ret);
68 return ret;
69 }
70
71 /* Set up the audio hub, telling it the currect i2s to use */
72 ahub = dev_get_parent(uc_priv->i2s);
73 ret = misc_ioctl(ahub, AHUB_MISCOP_SET_I2S, &uc_priv->i2s);
74 if (ret) {
75 log_debug("Cannot set i2c: %d\n", ret);
76 return ret;
77 }
78
79 log_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
85 static const struct sound_ops tegra_sound_ops = {
86 .setup = tegra_sound_setup,
87 .play = tegra_sound_play,
88 };
89
90 static const struct udevice_id tegra_sound_ids[] = {
91 { .compatible = "nvidia,tegra-audio-max98090-nyan-big" },
92 { }
93 };
94
95 U_BOOT_DRIVER(tegra_sound) = {
96 .name = "tegra_sound",
97 .id = UCLASS_SOUND,
98 .of_match = tegra_sound_ids,
99 .probe = tegra_sound_probe,
100 .ops = &tegra_sound_ops,
101 };
102