/*
|
* Copyright (C) 2010 Thomas Chou <thomas@wytron.com.tw>
|
*
|
* SPDX-License-Identifier: GPL-2.0+
|
*/
|
|
#include <common.h>
|
#include <dm.h>
|
#include <errno.h>
|
#include <misc.h>
|
|
/*
|
* Implement a miscellaneous uclass for those do not fit other more
|
* general classes. A set of generic read, write and ioctl methods may
|
* be used to access the device.
|
*/
|
|
int misc_read(struct udevice *dev, int offset, void *buf, int size)
|
{
|
const struct misc_ops *ops = device_get_ops(dev);
|
|
if (!ops->read)
|
return -ENOSYS;
|
|
return ops->read(dev, offset, buf, size);
|
}
|
|
int misc_write(struct udevice *dev, int offset, void *buf, int size)
|
{
|
const struct misc_ops *ops = device_get_ops(dev);
|
|
if (!ops->write)
|
return -ENOSYS;
|
|
return ops->write(dev, offset, buf, size);
|
}
|
|
int misc_ioctl(struct udevice *dev, unsigned long request, void *buf)
|
{
|
const struct misc_ops *ops = device_get_ops(dev);
|
|
if (!ops->ioctl)
|
return -ENOSYS;
|
|
return ops->ioctl(dev, request, buf);
|
}
|
|
int misc_call(struct udevice *dev, int msgid, void *tx_msg, int tx_size,
|
void *rx_msg, int rx_size)
|
{
|
const struct misc_ops *ops = device_get_ops(dev);
|
|
if (!ops->call)
|
return -ENOSYS;
|
|
return ops->call(dev, msgid, tx_msg, tx_size, rx_msg, rx_size);
|
}
|
|
struct udevice *misc_get_device_by_capability(u32 capability)
|
{
|
const struct misc_ops *ops;
|
struct udevice *dev;
|
struct uclass *uc;
|
int ret;
|
u32 cap;
|
|
ret = uclass_get(UCLASS_MISC, &uc);
|
if (ret)
|
return NULL;
|
|
for (uclass_first_device(UCLASS_MISC, &dev);
|
dev;
|
uclass_next_device(&dev)) {
|
ops = device_get_ops(dev);
|
if (!ops || !ops->ioctl)
|
continue;
|
|
ret = ops->ioctl(dev, IOCTL_REQ_CAPABILITY, &cap);
|
if (!ret && ((cap & capability) == capability))
|
return dev;
|
}
|
|
return NULL;
|
}
|
|
UCLASS_DRIVER(misc) = {
|
.id = UCLASS_MISC,
|
.name = "misc",
|
};
|
