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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 2018 JJ Hiblot <jjhiblot@ti.com>
*/
#include <command.h>
#include <dm.h>
#include <dm/device-internal.h>
#include <dm/lists.h>
#include <dm/root.h>
#include <dm/uclass-internal.h>
static int bind_by_class_index(const char *uclass, int index,
const char *drv_name)
{
static enum uclass_id uclass_id;
struct udevice *dev;
struct udevice *parent;
int ret;
struct driver *drv;
drv = lists_driver_lookup_name(drv_name);
if (!drv) {
printf("Cannot find driver '%s'\n", drv_name);
return -ENOENT;
}
uclass_id = uclass_get_by_name(uclass);
if (uclass_id == UCLASS_INVALID) {
printf("%s is not a valid uclass\n", uclass);
return -EINVAL;
}
ret = uclass_find_device(uclass_id, index, &parent);
if (!parent || ret) {
printf("Cannot find device %d of class %s\n", index, uclass);
return ret;
}
ret = device_bind_with_driver_data(parent, drv, drv->name, 0,
ofnode_null(), &dev);
if (!dev || ret) {
printf("Unable to bind. err:%d\n", ret);
return ret;
}
return 0;
}
static int find_dev(const char *uclass, int index, struct udevice **devp)
{
static enum uclass_id uclass_id;
int rc;
uclass_id = uclass_get_by_name(uclass);
if (uclass_id == UCLASS_INVALID) {
printf("%s is not a valid uclass\n", uclass);
return -EINVAL;
}
rc = uclass_find_device(uclass_id, index, devp);
if (!*devp || rc) {
printf("Cannot find device %d of class %s\n", index, uclass);
return rc;
}
return 0;
}
static int unbind_by_class_index(const char *uclass, int index)
{
int ret;
struct udevice *dev;
ret = find_dev(uclass, index, &dev);
if (ret)
return ret;
ret = device_remove(dev, DM_REMOVE_NORMAL);
if (ret) {
printf("Unable to remove. err:%d\n", ret);
return ret;
}
ret = device_unbind(dev);
if (ret) {
printf("Unable to unbind. err:%d\n", ret);
return ret;
}
return 0;
}
static int unbind_child_by_class_index(const char *uclass, int index,
const char *drv_name)
{
struct udevice *parent;
int ret;
struct driver *drv;
drv = lists_driver_lookup_name(drv_name);
if (!drv) {
printf("Cannot find driver '%s'\n", drv_name);
return -ENOENT;
}
ret = find_dev(uclass, index, &parent);
if (ret)
return ret;
ret = device_chld_remove(parent, drv, DM_REMOVE_NORMAL);
if (ret)
printf("Unable to remove all. err:%d\n", ret);
ret = device_chld_unbind(parent, drv);
if (ret)
printf("Unable to unbind all. err:%d\n", ret);
return ret;
}
static int bind_by_node_path(const char *path, const char *drv_name)
{
struct udevice *dev;
struct udevice *parent = NULL;
int ret;
ofnode ofnode;
struct driver *drv;
drv = lists_driver_lookup_name(drv_name);
if (!drv) {
printf("%s is not a valid driver name\n", drv_name);
return -ENOENT;
}
ofnode = ofnode_path(path);
if (!ofnode_valid(ofnode)) {
printf("%s is not a valid node path\n", path);
return -EINVAL;
}
while (ofnode_valid(ofnode)) {
if (!device_find_global_by_ofnode(ofnode, &parent))
break;
ofnode = ofnode_get_parent(ofnode);
}
if (!parent) {
printf("Cannot find a parent device for node path %s\n", path);
return -ENODEV;
}
ofnode = ofnode_path(path);
ret = lists_bind_fdt(parent, ofnode, &dev, drv, false);
if (!dev || ret) {
printf("Unable to bind. err:%d\n", ret);
return ret;
}
return 0;
}
static int unbind_by_node_path(const char *path)
{
struct udevice *dev;
int ret;
ofnode ofnode;
ofnode = ofnode_path(path);
if (!ofnode_valid(ofnode)) {
printf("%s is not a valid node path\n", path);
return -EINVAL;
}
ret = device_find_global_by_ofnode(ofnode, &dev);
if (!dev || ret) {
printf("Cannot find a device with path %s\n", path);
return -ENODEV;
}
ret = device_remove(dev, DM_REMOVE_NORMAL);
if (ret) {
printf("Unable to remove. err:%d\n", ret);
return ret;
}
ret = device_unbind(dev);
if (ret) {
printf("Unable to unbind. err:%d\n", ret);
return ret;
}
return 0;
}
static int do_bind_unbind(struct cmd_tbl *cmdtp, int flag, int argc,
char *const argv[])
{
int ret = 0;
bool bind;
bool by_node;
if (argc < 2)
return CMD_RET_USAGE;
bind = (argv[0][0] == 'b');
by_node = (argv[1][0] == '/');
if (by_node && bind) {
if (argc != 3)
return CMD_RET_USAGE;
ret = bind_by_node_path(argv[1], argv[2]);
} else if (by_node && !bind) {
if (argc != 2)
return CMD_RET_USAGE;
ret = unbind_by_node_path(argv[1]);
} else if (!by_node && bind) {
int index = (argc > 2) ? dectoul(argv[2], NULL) : 0;
if (argc != 4)
return CMD_RET_USAGE;
ret = bind_by_class_index(argv[1], index, argv[3]);
} else if (!by_node && !bind) {
int index = (argc > 2) ? dectoul(argv[2], NULL) : 0;
if (argc == 3)
ret = unbind_by_class_index(argv[1], index);
else if (argc == 4)
ret = unbind_child_by_class_index(argv[1], index,
argv[3]);
else
return CMD_RET_USAGE;
}
if (ret)
return CMD_RET_FAILURE;
else
return CMD_RET_SUCCESS;
}
U_BOOT_CMD(
bind, 4, 0, do_bind_unbind,
"Bind a device to a driver",
"<node path> <driver>\n"
"bind <class> <index> <driver>\n"
"Use 'dm tree' to list all devices registered in the driver model,\n"
"their path, class, index and current driver.\n"
);
U_BOOT_CMD(
unbind, 4, 0, do_bind_unbind,
"Unbind a device from a driver",
"<node path>\n"
"unbind <class> <index>\n"
"unbind <class> <index> <driver>\n"
"Use 'dm tree' to list all devices registered in the driver model,\n"
"their path, class, index and current driver.\n"
);
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