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 { .compatible = "google,spring-audio-max98095" }, 93 { .compatible = "samsung,smdk5420-audio-wm8994" }, 94 { .compatible = "google,peach-audio-max98090" }, 95 { } 96 }; 97 98 U_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 }; 105