LXR uboot/drivers/input/keyboard-uclass.c

   1/*
   2 * Copyright (c) 2015 Google, Inc
   3 *
   4 * SPDX-License-Identifier:     GPL-2.0+
   5 */
   6
   7#include <common.h>
   8#include <dm.h>
   9#include <keyboard.h>
  10
  11static int keyboard_start(struct stdio_dev *sdev)
  12{
  13        struct udevice *dev = sdev->priv;
  14        struct keyboard_ops *ops = keyboard_get_ops(dev);
  15
  16        if (ops->start)
  17                return ops->start(dev);
  18
  19        return 0;
  20}
  21
  22static int keyboard_stop(struct stdio_dev *sdev)
  23{
  24        struct udevice *dev = sdev->priv;
  25        struct keyboard_ops *ops = keyboard_get_ops(dev);
  26
  27        if (ops->stop)
  28                return ops->stop(dev);
  29
  30        return 0;
  31}
  32
  33static int keyboard_tstc(struct stdio_dev *sdev)
  34{
  35        struct udevice *dev = sdev->priv;
  36        struct keyboard_priv *priv = dev_get_uclass_priv(dev);
  37        struct keyboard_ops *ops = keyboard_get_ops(dev);
  38
  39        /* Just get input to do this for us if we can */
  40        if (priv->input.dev)
  41                return input_tstc(&priv->input);
  42        else if (ops->tstc)
  43                return ops->tstc(dev);
  44
  45        return -ENOSYS;
  46}
  47
  48static int keyboard_getc(struct stdio_dev *sdev)
  49{
  50        struct udevice *dev = sdev->priv;
  51        struct keyboard_priv *priv = dev_get_uclass_priv(dev);
  52        struct keyboard_ops *ops = keyboard_get_ops(dev);
  53
  54        /* Just get input to do this for us if we can */
  55        if (priv->input.dev)
  56                return input_getc(&priv->input);
  57        else if (ops->getc)
  58                return ops->getc(dev);
  59
  60        return -ENOSYS;
  61}
  62
  63static int keyboard_pre_probe(struct udevice *dev)
  64{
  65        struct keyboard_priv *priv = dev_get_uclass_priv(dev);
  66        struct stdio_dev *sdev = &priv->sdev;
  67        int ret;
  68
  69        strlcpy(sdev->name, dev->name, sizeof(sdev->name));
  70        sdev->flags = DEV_FLAGS_INPUT;
  71        sdev->getc = keyboard_getc;
  72        sdev->tstc = keyboard_tstc;
  73        sdev->start = keyboard_start;
  74        sdev->stop = keyboard_stop;
  75        sdev->priv = dev;
  76        ret = input_init(&priv->input, 0);
  77        if (ret) {
  78                debug("%s: Cannot set up input, ret=%d - please add DEBUG to drivers/input/input.c to figure out the cause\n",
  79                      __func__, ret);
  80                return ret;
  81        }
  82
  83        return 0;
  84}
  85
  86UCLASS_DRIVER(keyboard) = {
  87        .id             = UCLASS_KEYBOARD,
  88        .name           = "keyboard",
  89        .pre_probe      = keyboard_pre_probe,
  90        .per_device_auto_alloc_size = sizeof(struct keyboard_priv),
  91};
  92