| Simon Glass | d6cadd5 | 2018-12-10 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 | |
| 14 | static 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 | |
| 34 | static 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 | |
| 41 | static 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 | |
| 85 | static const struct sound_ops samsung_sound_ops = { |
| 86 | .setup = samsung_sound_setup, |
| 87 | .play = samsung_sound_play, |
| 88 | }; |
| 89 | |
| 90 | static const struct udevice_id samsung_sound_ids[] = { |
| 91 | { .compatible = "google,snow-audio-max98095" }, |
| 92 | { } |
| 93 | }; |
| 94 | |
| 95 | U_BOOT_DRIVER(samsung_sound) = { |
| 96 | .name = "samsung_sound", |
| 97 | .id = UCLASS_SOUND, |
| 98 | .of_match = samsung_sound_ids, |
| 99 | .probe = samsung_sound_probe, |
| 100 | .ops = &samsung_sound_ops, |
| 101 | }; |