1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright (c) 2015 Google, Inc 4 */ 5 6 #include <common.h> 7 #include <dm.h> 8 #include <keyboard.h> 9 10 static int keyboard_start(struct stdio_dev *sdev) 11 { 12 struct udevice *dev = sdev->priv; 13 struct keyboard_ops *ops = keyboard_get_ops(dev); 14 15 if (ops->start) 16 return ops->start(dev); 17 18 return 0; 19 } 20 21 static int keyboard_stop(struct stdio_dev *sdev) 22 { 23 struct udevice *dev = sdev->priv; 24 struct keyboard_ops *ops = keyboard_get_ops(dev); 25 26 if (ops->stop) 27 return ops->stop(dev); 28 29 return 0; 30 } 31 32 static int keyboard_tstc(struct stdio_dev *sdev) 33 { 34 struct udevice *dev = sdev->priv; 35 struct keyboard_priv *priv = dev_get_uclass_priv(dev); 36 struct keyboard_ops *ops = keyboard_get_ops(dev); 37 38 /* Just get input to do this for us if we can */ 39 if (priv->input.dev) 40 return input_tstc(&priv->input); 41 else if (ops->tstc) 42 return ops->tstc(dev); 43 44 return -ENOSYS; 45 } 46 47 static int keyboard_getc(struct stdio_dev *sdev) 48 { 49 struct udevice *dev = sdev->priv; 50 struct keyboard_priv *priv = dev_get_uclass_priv(dev); 51 struct keyboard_ops *ops = keyboard_get_ops(dev); 52 53 /* Just get input to do this for us if we can */ 54 if (priv->input.dev) 55 return input_getc(&priv->input); 56 else if (ops->getc) 57 return ops->getc(dev); 58 59 return -ENOSYS; 60 } 61 62 static int keyboard_pre_probe(struct udevice *dev) 63 { 64 struct keyboard_priv *priv = dev_get_uclass_priv(dev); 65 struct stdio_dev *sdev = &priv->sdev; 66 int ret; 67 68 strlcpy(sdev->name, dev->name, sizeof(sdev->name)); 69 sdev->flags = DEV_FLAGS_INPUT; 70 sdev->getc = keyboard_getc; 71 sdev->tstc = keyboard_tstc; 72 sdev->start = keyboard_start; 73 sdev->stop = keyboard_stop; 74 sdev->priv = dev; 75 ret = input_init(&priv->input, 0); 76 if (ret) { 77 debug("%s: Cannot set up input, ret=%d - please add DEBUG to drivers/input/input.c to figure out the cause\n", 78 __func__, ret); 79 return ret; 80 } 81 82 return 0; 83 } 84 85 UCLASS_DRIVER(keyboard) = { 86 .id = UCLASS_KEYBOARD, 87 .name = "keyboard", 88 .pre_probe = keyboard_pre_probe, 89 .per_device_auto_alloc_size = sizeof(struct keyboard_priv), 90 }; 91