mirror of
https://github.com/AsahiLinux/u-boot
synced 2024-12-05 02:51:00 +00:00
3be9bcb048
Also add a 'drv' parameter to filter the children to remove/unbind. Exporting those functions is a preparatory work for the addition of the bind/unbind commands. Signed-off-by: Jean-Jacques Hiblot <jjhiblot@ti.com>
216 lines
4 KiB
C
216 lines
4 KiB
C
// SPDX-License-Identifier: GPL-2.0+
|
|
/*
|
|
* Device manager
|
|
*
|
|
* Copyright (c) 2014 Google, Inc
|
|
*
|
|
* (C) Copyright 2012
|
|
* Pavel Herrmann <morpheus.ibis@gmail.com>
|
|
*/
|
|
|
|
#include <common.h>
|
|
#include <errno.h>
|
|
#include <malloc.h>
|
|
#include <dm/device.h>
|
|
#include <dm/device-internal.h>
|
|
#include <dm/uclass.h>
|
|
#include <dm/uclass-internal.h>
|
|
#include <dm/util.h>
|
|
|
|
int device_chld_unbind(struct udevice *dev, struct driver *drv)
|
|
{
|
|
struct udevice *pos, *n;
|
|
int ret, saved_ret = 0;
|
|
|
|
assert(dev);
|
|
|
|
list_for_each_entry_safe(pos, n, &dev->child_head, sibling_node) {
|
|
if (drv && (pos->driver != drv))
|
|
continue;
|
|
|
|
ret = device_unbind(pos);
|
|
if (ret && !saved_ret)
|
|
saved_ret = ret;
|
|
}
|
|
|
|
return saved_ret;
|
|
}
|
|
|
|
int device_chld_remove(struct udevice *dev, struct driver *drv,
|
|
uint flags)
|
|
{
|
|
struct udevice *pos, *n;
|
|
int ret;
|
|
|
|
assert(dev);
|
|
|
|
list_for_each_entry_safe(pos, n, &dev->child_head, sibling_node) {
|
|
if (drv && (pos->driver != drv))
|
|
continue;
|
|
|
|
ret = device_remove(pos, flags);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
int device_unbind(struct udevice *dev)
|
|
{
|
|
const struct driver *drv;
|
|
int ret;
|
|
|
|
if (!dev)
|
|
return -EINVAL;
|
|
|
|
if (dev->flags & DM_FLAG_ACTIVATED)
|
|
return -EINVAL;
|
|
|
|
if (!(dev->flags & DM_FLAG_BOUND))
|
|
return -EINVAL;
|
|
|
|
drv = dev->driver;
|
|
assert(drv);
|
|
|
|
if (drv->unbind) {
|
|
ret = drv->unbind(dev);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
|
|
ret = device_chld_unbind(dev, NULL);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (dev->flags & DM_FLAG_ALLOC_PDATA) {
|
|
free(dev->platdata);
|
|
dev->platdata = NULL;
|
|
}
|
|
if (dev->flags & DM_FLAG_ALLOC_UCLASS_PDATA) {
|
|
free(dev->uclass_platdata);
|
|
dev->uclass_platdata = NULL;
|
|
}
|
|
if (dev->flags & DM_FLAG_ALLOC_PARENT_PDATA) {
|
|
free(dev->parent_platdata);
|
|
dev->parent_platdata = NULL;
|
|
}
|
|
ret = uclass_unbind_device(dev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (dev->parent)
|
|
list_del(&dev->sibling_node);
|
|
|
|
devres_release_all(dev);
|
|
|
|
if (dev->flags & DM_FLAG_NAME_ALLOCED)
|
|
free((char *)dev->name);
|
|
free(dev);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* device_free() - Free memory buffers allocated by a device
|
|
* @dev: Device that is to be started
|
|
*/
|
|
void device_free(struct udevice *dev)
|
|
{
|
|
int size;
|
|
|
|
if (dev->driver->priv_auto_alloc_size) {
|
|
free(dev->priv);
|
|
dev->priv = NULL;
|
|
}
|
|
size = dev->uclass->uc_drv->per_device_auto_alloc_size;
|
|
if (size) {
|
|
free(dev->uclass_priv);
|
|
dev->uclass_priv = NULL;
|
|
}
|
|
if (dev->parent) {
|
|
size = dev->parent->driver->per_child_auto_alloc_size;
|
|
if (!size) {
|
|
size = dev->parent->uclass->uc_drv->
|
|
per_child_auto_alloc_size;
|
|
}
|
|
if (size) {
|
|
free(dev->parent_priv);
|
|
dev->parent_priv = NULL;
|
|
}
|
|
}
|
|
|
|
devres_release_probe(dev);
|
|
}
|
|
|
|
static bool flags_remove(uint flags, uint drv_flags)
|
|
{
|
|
if ((flags & DM_REMOVE_NORMAL) ||
|
|
(flags & (drv_flags & (DM_FLAG_ACTIVE_DMA | DM_FLAG_OS_PREPARE))))
|
|
return true;
|
|
|
|
return false;
|
|
}
|
|
|
|
int device_remove(struct udevice *dev, uint flags)
|
|
{
|
|
const struct driver *drv;
|
|
int ret;
|
|
|
|
if (!dev)
|
|
return -EINVAL;
|
|
|
|
if (!(dev->flags & DM_FLAG_ACTIVATED))
|
|
return 0;
|
|
|
|
drv = dev->driver;
|
|
assert(drv);
|
|
|
|
ret = uclass_pre_remove_device(dev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
ret = device_chld_remove(dev, NULL, flags);
|
|
if (ret)
|
|
goto err;
|
|
|
|
/*
|
|
* Remove the device if called with the "normal" remove flag set,
|
|
* or if the remove flag matches any of the drivers remove flags
|
|
*/
|
|
if (drv->remove && flags_remove(flags, drv->flags)) {
|
|
ret = drv->remove(dev);
|
|
if (ret)
|
|
goto err_remove;
|
|
}
|
|
|
|
if (dev->parent && dev->parent->driver->child_post_remove) {
|
|
ret = dev->parent->driver->child_post_remove(dev);
|
|
if (ret) {
|
|
dm_warn("%s: Device '%s' failed child_post_remove()",
|
|
__func__, dev->name);
|
|
}
|
|
}
|
|
|
|
if (flags_remove(flags, drv->flags)) {
|
|
device_free(dev);
|
|
|
|
dev->seq = -1;
|
|
dev->flags &= ~DM_FLAG_ACTIVATED;
|
|
}
|
|
|
|
return ret;
|
|
|
|
err_remove:
|
|
/* We can't put the children back */
|
|
dm_warn("%s: Device '%s' failed to remove, but children are gone\n",
|
|
__func__, dev->name);
|
|
err:
|
|
ret = uclass_post_probe_device(dev);
|
|
if (ret) {
|
|
dm_warn("%s: Device '%s' failed to post_probe on error path\n",
|
|
__func__, dev->name);
|
|
}
|
|
|
|
return ret;
|
|
}
|