misc_sandbox.c
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// SPDX-License-Identifier: GPL-2.0+
/*
* (C) Copyright 2018
* Mario Six, Guntermann & Drunck GmbH, mario.six@gdsys.cc
*/
#include <common.h>
#include <dm.h>
#include <misc.h>
struct misc_sandbox_priv {
u8 mem[128];
ulong last_ioctl;
bool enabled;
};
int misc_sandbox_read(struct udevice *dev, int offset, void *buf, int size)
{
struct misc_sandbox_priv *priv = dev_get_priv(dev);
memcpy(buf, priv->mem + offset, size);
return size;
}
int misc_sandbox_write(struct udevice *dev, int offset, const void *buf,
int size)
{
struct misc_sandbox_priv *priv = dev_get_priv(dev);
memcpy(priv->mem + offset, buf, size);
return size;
}
int misc_sandbox_ioctl(struct udevice *dev, unsigned long request, void *buf)
{
struct misc_sandbox_priv *priv = dev_get_priv(dev);
priv->last_ioctl = request;
return 0;
}
int misc_sandbox_call(struct udevice *dev, int msgid, void *tx_msg,
int tx_size, void *rx_msg, int rx_size)
{
struct misc_sandbox_priv *priv = dev_get_priv(dev);
if (msgid == 0) {
int num = *(int *)tx_msg;
switch (num) {
case 0:
strncpy(rx_msg, "Zero", rx_size);
break;
case 1:
strncpy(rx_msg, "One", rx_size);
break;
case 2:
strncpy(rx_msg, "Two", rx_size);
break;
default:
return -EINVAL;
}
}
if (msgid == 1) {
int num = *(int *)tx_msg;
switch (num) {
case 0:
strncpy(rx_msg, "Forty", rx_size);
break;
case 1:
strncpy(rx_msg, "Forty-one", rx_size);
break;
case 2:
strncpy(rx_msg, "Forty-two", rx_size);
break;
default:
return -EINVAL;
}
}
if (msgid == 2)
memcpy(rx_msg, &priv->last_ioctl, sizeof(priv->last_ioctl));
if (msgid == 3)
memcpy(rx_msg, &priv->enabled, sizeof(priv->enabled));
return 0;
}
int misc_sandbox_set_enabled(struct udevice *dev, bool val)
{
struct misc_sandbox_priv *priv = dev_get_priv(dev);
priv->enabled = !priv->enabled;
return 0;
}
static const struct misc_ops misc_sandbox_ops = {
.read = misc_sandbox_read,
.write = misc_sandbox_write,
.ioctl = misc_sandbox_ioctl,
.call = misc_sandbox_call,
.set_enabled = misc_sandbox_set_enabled,
};
int misc_sandbox_probe(struct udevice *dev)
{
struct misc_sandbox_priv *priv = dev_get_priv(dev);
priv->enabled = true;
return 0;
}
static const struct udevice_id misc_sandbox_ids[] = {
{ .compatible = "sandbox,misc_sandbox" },
{ }
};
U_BOOT_DRIVER(misc_sandbox) = {
.name = "misc_sandbox",
.id = UCLASS_MISC,
.ops = &misc_sandbox_ops,
.of_match = misc_sandbox_ids,
.probe = misc_sandbox_probe,
.priv_auto_alloc_size = sizeof(struct misc_sandbox_priv),
};