Eric Lee / smarc-uboot

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drivers/input/keyboard-uclass.c 1.99 KB
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83d290c56   Tom Rini   SPDX: Convert all... 
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  // SPDX-License-Identifier: GPL-2.0+
e84421d8f   Simon Glass   dm: input: Create... 
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  /*
   * Copyright (c) 2015 Google, Inc
e84421d8f   Simon Glass   dm: input: Create... 
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   */
  
  #include <common.h>
  #include <dm.h>
  #include <keyboard.h>
  
  static int keyboard_start(struct stdio_dev *sdev)
  {
  	struct udevice *dev = sdev->priv;
  	struct keyboard_ops *ops = keyboard_get_ops(dev);
  
  	if (ops->start)
  		return ops->start(dev);
  
  	return 0;
  }
  
  static int keyboard_stop(struct stdio_dev *sdev)
  {
  	struct udevice *dev = sdev->priv;
  	struct keyboard_ops *ops = keyboard_get_ops(dev);
  
  	if (ops->stop)
  		return ops->stop(dev);
  
  	return 0;
  }
  
  static int keyboard_tstc(struct stdio_dev *sdev)
  {
  	struct udevice *dev = sdev->priv;
  	struct keyboard_priv *priv = dev_get_uclass_priv(dev);
  	struct keyboard_ops *ops = keyboard_get_ops(dev);
  
  	/* Just get input to do this for us if we can */
  	if (priv->input.dev)
  		return input_tstc(&priv->input);
  	else if (ops->tstc)
  		return ops->tstc(dev);
  
  	return -ENOSYS;
  }
  
  static int keyboard_getc(struct stdio_dev *sdev)
  {
  	struct udevice *dev = sdev->priv;
  	struct keyboard_priv *priv = dev_get_uclass_priv(dev);
  	struct keyboard_ops *ops = keyboard_get_ops(dev);
  
  	/* Just get input to do this for us if we can */
  	if (priv->input.dev)
  		return input_getc(&priv->input);
  	else if (ops->getc)
  		return ops->getc(dev);
  
  	return -ENOSYS;
  }
  
  static int keyboard_pre_probe(struct udevice *dev)
  {
  	struct keyboard_priv *priv = dev_get_uclass_priv(dev);
  	struct stdio_dev *sdev = &priv->sdev;
  	int ret;
  
  	strlcpy(sdev->name, dev->name, sizeof(sdev->name));
  	sdev->flags = DEV_FLAGS_INPUT;
  	sdev->getc = keyboard_getc;
  	sdev->tstc = keyboard_tstc;
  	sdev->start = keyboard_start;
  	sdev->stop = keyboard_stop;
  	sdev->priv = dev;
  	ret = input_init(&priv->input, 0);
  	if (ret) {
  		debug("%s: Cannot set up input, ret=%d - please add DEBUG to drivers/input/input.c to figure out the cause
  ",
  		      __func__, ret);
  		return ret;
  	}
  
  	return 0;
  }
  
  UCLASS_DRIVER(keyboard) = {
  	.id		= UCLASS_KEYBOARD,
  	.name		= "keyboard",
  	.pre_probe	= keyboard_pre_probe,
  	.per_device_auto_alloc_size = sizeof(struct keyboard_priv),
  };