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 #include <asm/arch/power.h> 14 15 static int samsung_sound_setup(struct udevice *dev) 16 { 17 struct sound_uc_priv *uc_priv = dev_get_uclass_priv(dev); 18 struct i2s_uc_priv *i2c_priv = dev_get_uclass_priv(uc_priv->i2s); 19 int ret; 20 21 if (uc_priv->setup_done) 22 return -EALREADY; 23 ret = audio_codec_set_params(uc_priv->codec, i2c_priv->id, 24 i2c_priv->samplingrate, 25 i2c_priv->samplingrate * i2c_priv->rfs, 26 i2c_priv->bitspersample, 27 i2c_priv->channels); 28 if (ret) 29 return ret; 30 uc_priv->setup_done = true; 31 32 return 0; 33 } 34 35 static int samsung_sound_play(struct udevice *dev, void *data, uint data_size) 36 { 37 struct sound_uc_priv *uc_priv = dev_get_uclass_priv(dev); 38 39 return i2s_tx_data(uc_priv->i2s, data, data_size); 40 } 41 42 static int samsung_sound_probe(struct udevice *dev) 43 { 44 struct sound_uc_priv *uc_priv = dev_get_uclass_priv(dev); 45 struct ofnode_phandle_args args; 46 struct gpio_desc en_gpio; 47 ofnode node; 48 int ret; 49 50 ret = gpio_request_by_name(dev, "codec-enable-gpio", 0, &en_gpio, 51 GPIOD_IS_OUT | GPIOD_IS_OUT_ACTIVE); 52 53 /* Turn on the GPIO which connects to the codec's "enable" line. */ 54 if (!ret) 55 gpio_set_pull(gpio_get_number(&en_gpio), S5P_GPIO_PULL_NONE); 56 57 ret = uclass_get_device_by_phandle(UCLASS_AUDIO_CODEC, dev, 58 "samsung,audio-codec", 59 &uc_priv->codec); 60 if (ret) { 61 debug("Failed to probe audio codec\n"); 62 return ret; 63 } 64 node = ofnode_find_subnode(dev_ofnode(dev), "cpu"); 65 if (!ofnode_valid(node)) { 66 debug("Failed to find /cpu subnode\n"); 67 return -EINVAL; 68 } 69 ret = ofnode_parse_phandle_with_args(node, "sound-dai", 70 "#sound-dai-cells", 0, 0, &args); 71 if (ret) { 72 debug("Cannot find phandle: %d\n", ret); 73 return ret; 74 } 75 ret = uclass_get_device_by_ofnode(UCLASS_I2S, args.node, &uc_priv->i2s); 76 if (ret) { 77 debug("Cannot find i2s: %d\n", ret); 78 return ret; 79 } 80 debug("Probed sound '%s' with codec '%s' and i2s '%s'\n", dev->name, 81 uc_priv->codec->name, uc_priv->i2s->name); 82 83 /* Enable codec clock */ 84 set_xclkout(); 85 86 return 0; 87 } 88 89 static const struct sound_ops samsung_sound_ops = { 90 .setup = samsung_sound_setup, 91 .play = samsung_sound_play, 92 }; 93 94 static const struct udevice_id samsung_sound_ids[] = { 95 { .compatible = "google,snow-audio-max98095" }, 96 { .compatible = "google,spring-audio-max98088" }, 97 { .compatible = "samsung,smdk5420-audio-wm8994" }, 98 { .compatible = "google,peach-audio-max98090" }, 99 { } 100 }; 101 102 U_BOOT_DRIVER(samsung_sound) = { 103 .name = "samsung_sound", 104 .id = UCLASS_SOUND, 105 .of_match = samsung_sound_ids, 106 .probe = samsung_sound_probe, 107 .ops = &samsung_sound_ops, 108 }; 109