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

   1// SPDX-License-Identifier: GPL-2.0+
   2/*
   3 * Copyright (c) 2015 Google, Inc
   4 */
   5
   6#define LOG_CATEGORY UCLASS_KEYBOARD
   7
   8#include <common.h>
   9#include <dm.h>
  10#include <keyboard.h>
  11#include <log.h>
  12
  13static int keyboard_start(struct stdio_dev *sdev)
  14{
  15        struct udevice *dev = sdev->priv;
  16        struct keyboard_ops *ops = keyboard_get_ops(dev);
  17
  18        if (ops->start)
  19                return ops->start(dev);
  20
  21        return 0;
  22}
  23
  24static int keyboard_stop(struct stdio_dev *sdev)
  25{
  26        struct udevice *dev = sdev->priv;
  27        struct keyboard_ops *ops = keyboard_get_ops(dev);
  28
  29        if (ops->stop)
  30                return ops->stop(dev);
  31
  32        return 0;
  33}
  34
  35static int keyboard_tstc(struct stdio_dev *sdev)
  36{
  37        struct udevice *dev = sdev->priv;
  38        struct keyboard_priv *priv = dev_get_uclass_priv(dev);
  39        struct keyboard_ops *ops = keyboard_get_ops(dev);
  40
  41        /* Just get input to do this for us if we can */
  42        if (priv->input.dev)
  43                return input_tstc(&priv->input);
  44        else if (ops->tstc)
  45                return ops->tstc(dev);
  46
  47        return -ENOSYS;
  48}
  49
  50static int keyboard_getc(struct stdio_dev *sdev)
  51{
  52        struct udevice *dev = sdev->priv;
  53        struct keyboard_priv *priv = dev_get_uclass_priv(dev);
  54        struct keyboard_ops *ops = keyboard_get_ops(dev);
  55
  56        /* Just get input to do this for us if we can */
  57        if (priv->input.dev)
  58                return input_getc(&priv->input);
  59        else if (ops->getc)
  60                return ops->getc(dev);
  61
  62        return -ENOSYS;
  63}
  64
  65static int keyboard_pre_probe(struct udevice *dev)
  66{
  67        struct keyboard_priv *priv = dev_get_uclass_priv(dev);
  68        struct stdio_dev *sdev = &priv->sdev;
  69        int ret;
  70
  71        strlcpy(sdev->name, dev->name, sizeof(sdev->name));
  72        sdev->flags = DEV_FLAGS_INPUT;
  73        sdev->getc = keyboard_getc;
  74        sdev->tstc = keyboard_tstc;
  75        sdev->start = keyboard_start;
  76        sdev->stop = keyboard_stop;
  77        sdev->priv = dev;
  78        ret = input_init(&priv->input, 0);
  79        if (ret) {
  80                debug("%s: Cannot set up input, ret=%d - please add DEBUG to drivers/input/input.c to figure out the cause\n",
  81                      __func__, ret);
  82                return ret;
  83        }
  84
  85        return 0;
  86}
  87
  88UCLASS_DRIVER(keyboard) = {
  89        .id             = UCLASS_KEYBOARD,
  90        .name           = "keyboard",
  91        .pre_probe      = keyboard_pre_probe,
  92        .per_device_auto        = sizeof(struct keyboard_priv),
  93};
  94