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