mirror of https://github.com/Qortal/Brooklyn
You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
102 lines
2.9 KiB
102 lines
2.9 KiB
/* SPDX-License-Identifier: GPL-2.0 */ |
|
#ifndef __GADGET_CONFIGFS__ |
|
#define __GADGET_CONFIGFS__ |
|
|
|
#include <linux/configfs.h> |
|
|
|
int check_user_usb_string(const char *name, |
|
struct usb_gadget_strings *stringtab_dev); |
|
|
|
#define GS_STRINGS_W(__struct, __name) \ |
|
static ssize_t __struct##_##__name##_store(struct config_item *item, \ |
|
const char *page, size_t len) \ |
|
{ \ |
|
struct __struct *gs = to_##__struct(item); \ |
|
int ret; \ |
|
\ |
|
ret = usb_string_copy(page, &gs->__name); \ |
|
if (ret) \ |
|
return ret; \ |
|
return len; \ |
|
} |
|
|
|
#define GS_STRINGS_R(__struct, __name) \ |
|
static ssize_t __struct##_##__name##_show(struct config_item *item, char *page) \ |
|
{ \ |
|
struct __struct *gs = to_##__struct(item); \ |
|
return sprintf(page, "%s\n", gs->__name ?: ""); \ |
|
} |
|
|
|
#define GS_STRINGS_RW(struct_name, _name) \ |
|
GS_STRINGS_R(struct_name, _name) \ |
|
GS_STRINGS_W(struct_name, _name) \ |
|
CONFIGFS_ATTR(struct_name##_, _name) |
|
|
|
#define USB_CONFIG_STRING_RW_OPS(struct_in) \ |
|
static struct configfs_item_operations struct_in##_langid_item_ops = { \ |
|
.release = struct_in##_attr_release, \ |
|
}; \ |
|
\ |
|
static struct config_item_type struct_in##_langid_type = { \ |
|
.ct_item_ops = &struct_in##_langid_item_ops, \ |
|
.ct_attrs = struct_in##_langid_attrs, \ |
|
.ct_owner = THIS_MODULE, \ |
|
} |
|
|
|
#define USB_CONFIG_STRINGS_LANG(struct_in, struct_member) \ |
|
static struct config_group *struct_in##_strings_make( \ |
|
struct config_group *group, \ |
|
const char *name) \ |
|
{ \ |
|
struct struct_member *gi; \ |
|
struct struct_in *gs; \ |
|
struct struct_in *new; \ |
|
int langs = 0; \ |
|
int ret; \ |
|
\ |
|
new = kzalloc(sizeof(*new), GFP_KERNEL); \ |
|
if (!new) \ |
|
return ERR_PTR(-ENOMEM); \ |
|
\ |
|
ret = check_user_usb_string(name, &new->stringtab_dev); \ |
|
if (ret) \ |
|
goto err; \ |
|
config_group_init_type_name(&new->group, name, \ |
|
&struct_in##_langid_type); \ |
|
\ |
|
gi = container_of(group, struct struct_member, strings_group); \ |
|
ret = -EEXIST; \ |
|
list_for_each_entry(gs, &gi->string_list, list) { \ |
|
if (gs->stringtab_dev.language == new->stringtab_dev.language) \ |
|
goto err; \ |
|
langs++; \ |
|
} \ |
|
ret = -EOVERFLOW; \ |
|
if (langs >= MAX_USB_STRING_LANGS) \ |
|
goto err; \ |
|
\ |
|
list_add_tail(&new->list, &gi->string_list); \ |
|
return &new->group; \ |
|
err: \ |
|
kfree(new); \ |
|
return ERR_PTR(ret); \ |
|
} \ |
|
\ |
|
static void struct_in##_strings_drop( \ |
|
struct config_group *group, \ |
|
struct config_item *item) \ |
|
{ \ |
|
config_item_put(item); \ |
|
} \ |
|
\ |
|
static struct configfs_group_operations struct_in##_strings_ops = { \ |
|
.make_group = &struct_in##_strings_make, \ |
|
.drop_item = &struct_in##_strings_drop, \ |
|
}; \ |
|
\ |
|
static struct config_item_type struct_in##_strings_type = { \ |
|
.ct_group_ops = &struct_in##_strings_ops, \ |
|
.ct_owner = THIS_MODULE, \ |
|
} |
|
|
|
#endif
|
|
|