1 #include <linux/configfs.h>
2 #include <linux/module.h>
3 #include <linux/slab.h>
4 #include <linux/device.h>
6 #include <linux/usb/composite.h>
7 #include <linux/usb/gadget_configfs.h>
10 #include "u_os_desc.h"
12 int check_user_usb_string(const char *name
,
13 struct usb_gadget_strings
*stringtab_dev
)
15 unsigned primary_lang
;
20 ret
= kstrtou16(name
, 0, &num
);
24 primary_lang
= num
& 0x3ff;
27 /* simple sanity check for valid langid */
28 switch (primary_lang
) {
37 stringtab_dev
->language
= num
;
41 #define MAX_NAME_LEN 40
42 #define MAX_USB_STRING_LANGS 2
44 static const struct usb_descriptor_header
*otg_desc
[2];
47 struct config_group group
;
48 struct config_group functions_group
;
49 struct config_group configs_group
;
50 struct config_group strings_group
;
51 struct config_group os_desc_group
;
52 struct config_group
*default_groups
[5];
55 struct usb_gadget_strings
*gstrings
[MAX_USB_STRING_LANGS
+ 1];
56 struct list_head string_list
;
57 struct list_head available_func
;
60 struct usb_composite_driver composite
;
61 struct usb_composite_dev cdev
;
64 char qw_sign
[OS_STRING_QW_SIGN_LEN
];
67 struct config_usb_cfg
{
68 struct config_group group
;
69 struct config_group strings_group
;
70 struct config_group
*default_groups
[2];
71 struct list_head string_list
;
72 struct usb_configuration c
;
73 struct list_head func_list
;
74 struct usb_gadget_strings
*gstrings
[MAX_USB_STRING_LANGS
+ 1];
77 struct gadget_strings
{
78 struct usb_gadget_strings stringtab_dev
;
79 struct usb_string strings
[USB_GADGET_FIRST_AVAIL_IDX
];
84 struct config_group group
;
85 struct list_head list
;
89 struct config_group group
;
92 struct gadget_config_name
{
93 struct usb_gadget_strings stringtab_dev
;
94 struct usb_string strings
;
97 struct config_group group
;
98 struct list_head list
;
101 static int usb_string_copy(const char *s
, char **s_copy
)
105 char *copy
= *s_copy
;
110 str
= kstrdup(s
, GFP_KERNEL
);
113 if (str
[ret
- 1] == '\n')
120 CONFIGFS_ATTR_STRUCT(gadget_info
);
121 CONFIGFS_ATTR_STRUCT(config_usb_cfg
);
123 #define GI_DEVICE_DESC_ITEM_ATTR(name) \
124 static struct gadget_info_attribute gadget_cdev_desc_##name = \
125 __CONFIGFS_ATTR(name, S_IRUGO | S_IWUSR, \
126 gadget_dev_desc_##name##_show, \
127 gadget_dev_desc_##name##_store)
129 #define GI_DEVICE_DESC_SIMPLE_R_u8(__name) \
130 static ssize_t gadget_dev_desc_##__name##_show(struct gadget_info *gi, \
133 return sprintf(page, "0x%02x\n", gi->cdev.desc.__name); \
136 #define GI_DEVICE_DESC_SIMPLE_R_u16(__name) \
137 static ssize_t gadget_dev_desc_##__name##_show(struct gadget_info *gi, \
140 return sprintf(page, "0x%04x\n", le16_to_cpup(&gi->cdev.desc.__name)); \
144 #define GI_DEVICE_DESC_SIMPLE_W_u8(_name) \
145 static ssize_t gadget_dev_desc_##_name##_store(struct gadget_info *gi, \
146 const char *page, size_t len) \
150 ret = kstrtou8(page, 0, &val); \
153 gi->cdev.desc._name = val; \
157 #define GI_DEVICE_DESC_SIMPLE_W_u16(_name) \
158 static ssize_t gadget_dev_desc_##_name##_store(struct gadget_info *gi, \
159 const char *page, size_t len) \
163 ret = kstrtou16(page, 0, &val); \
166 gi->cdev.desc._name = cpu_to_le16p(&val); \
170 #define GI_DEVICE_DESC_SIMPLE_RW(_name, _type) \
171 GI_DEVICE_DESC_SIMPLE_R_##_type(_name) \
172 GI_DEVICE_DESC_SIMPLE_W_##_type(_name)
174 GI_DEVICE_DESC_SIMPLE_R_u16(bcdUSB
);
175 GI_DEVICE_DESC_SIMPLE_RW(bDeviceClass
, u8
);
176 GI_DEVICE_DESC_SIMPLE_RW(bDeviceSubClass
, u8
);
177 GI_DEVICE_DESC_SIMPLE_RW(bDeviceProtocol
, u8
);
178 GI_DEVICE_DESC_SIMPLE_RW(bMaxPacketSize0
, u8
);
179 GI_DEVICE_DESC_SIMPLE_RW(idVendor
, u16
);
180 GI_DEVICE_DESC_SIMPLE_RW(idProduct
, u16
);
181 GI_DEVICE_DESC_SIMPLE_R_u16(bcdDevice
);
183 static ssize_t
is_valid_bcd(u16 bcd_val
)
185 if ((bcd_val
& 0xf) > 9)
187 if (((bcd_val
>> 4) & 0xf) > 9)
189 if (((bcd_val
>> 8) & 0xf) > 9)
191 if (((bcd_val
>> 12) & 0xf) > 9)
196 static ssize_t
gadget_dev_desc_bcdDevice_store(struct gadget_info
*gi
,
197 const char *page
, size_t len
)
202 ret
= kstrtou16(page
, 0, &bcdDevice
);
205 ret
= is_valid_bcd(bcdDevice
);
209 gi
->cdev
.desc
.bcdDevice
= cpu_to_le16(bcdDevice
);
213 static ssize_t
gadget_dev_desc_bcdUSB_store(struct gadget_info
*gi
,
214 const char *page
, size_t len
)
219 ret
= kstrtou16(page
, 0, &bcdUSB
);
222 ret
= is_valid_bcd(bcdUSB
);
226 gi
->cdev
.desc
.bcdUSB
= cpu_to_le16(bcdUSB
);
230 static ssize_t
gadget_dev_desc_UDC_show(struct gadget_info
*gi
, char *page
)
232 return sprintf(page
, "%s\n", gi
->udc_name
?: "");
235 static int unregister_gadget(struct gadget_info
*gi
)
242 ret
= usb_gadget_unregister_driver(&gi
->composite
.gadget_driver
);
250 static ssize_t
gadget_dev_desc_UDC_store(struct gadget_info
*gi
,
251 const char *page
, size_t len
)
256 name
= kstrdup(page
, GFP_KERNEL
);
259 if (name
[len
- 1] == '\n')
260 name
[len
- 1] = '\0';
262 mutex_lock(&gi
->lock
);
265 ret
= unregister_gadget(gi
);
273 ret
= usb_udc_attach_driver(name
, &gi
->composite
.gadget_driver
);
278 mutex_unlock(&gi
->lock
);
282 mutex_unlock(&gi
->lock
);
286 GI_DEVICE_DESC_ITEM_ATTR(bDeviceClass
);
287 GI_DEVICE_DESC_ITEM_ATTR(bDeviceSubClass
);
288 GI_DEVICE_DESC_ITEM_ATTR(bDeviceProtocol
);
289 GI_DEVICE_DESC_ITEM_ATTR(bMaxPacketSize0
);
290 GI_DEVICE_DESC_ITEM_ATTR(idVendor
);
291 GI_DEVICE_DESC_ITEM_ATTR(idProduct
);
292 GI_DEVICE_DESC_ITEM_ATTR(bcdDevice
);
293 GI_DEVICE_DESC_ITEM_ATTR(bcdUSB
);
294 GI_DEVICE_DESC_ITEM_ATTR(UDC
);
296 static struct configfs_attribute
*gadget_root_attrs
[] = {
297 &gadget_cdev_desc_bDeviceClass
.attr
,
298 &gadget_cdev_desc_bDeviceSubClass
.attr
,
299 &gadget_cdev_desc_bDeviceProtocol
.attr
,
300 &gadget_cdev_desc_bMaxPacketSize0
.attr
,
301 &gadget_cdev_desc_idVendor
.attr
,
302 &gadget_cdev_desc_idProduct
.attr
,
303 &gadget_cdev_desc_bcdDevice
.attr
,
304 &gadget_cdev_desc_bcdUSB
.attr
,
305 &gadget_cdev_desc_UDC
.attr
,
309 static inline struct gadget_info
*to_gadget_info(struct config_item
*item
)
311 return container_of(to_config_group(item
), struct gadget_info
, group
);
314 static inline struct gadget_strings
*to_gadget_strings(struct config_item
*item
)
316 return container_of(to_config_group(item
), struct gadget_strings
,
320 static inline struct gadget_config_name
*to_gadget_config_name(
321 struct config_item
*item
)
323 return container_of(to_config_group(item
), struct gadget_config_name
,
327 static inline struct config_usb_cfg
*to_config_usb_cfg(struct config_item
*item
)
329 return container_of(to_config_group(item
), struct config_usb_cfg
,
333 static inline struct usb_function_instance
*to_usb_function_instance(
334 struct config_item
*item
)
336 return container_of(to_config_group(item
),
337 struct usb_function_instance
, group
);
340 static void gadget_info_attr_release(struct config_item
*item
)
342 struct gadget_info
*gi
= to_gadget_info(item
);
344 WARN_ON(!list_empty(&gi
->cdev
.configs
));
345 WARN_ON(!list_empty(&gi
->string_list
));
346 WARN_ON(!list_empty(&gi
->available_func
));
347 kfree(gi
->composite
.gadget_driver
.function
);
351 CONFIGFS_ATTR_OPS(gadget_info
);
353 static struct configfs_item_operations gadget_root_item_ops
= {
354 .release
= gadget_info_attr_release
,
355 .show_attribute
= gadget_info_attr_show
,
356 .store_attribute
= gadget_info_attr_store
,
359 static void gadget_config_attr_release(struct config_item
*item
)
361 struct config_usb_cfg
*cfg
= to_config_usb_cfg(item
);
363 WARN_ON(!list_empty(&cfg
->c
.functions
));
364 list_del(&cfg
->c
.list
);
369 static int config_usb_cfg_link(
370 struct config_item
*usb_cfg_ci
,
371 struct config_item
*usb_func_ci
)
373 struct config_usb_cfg
*cfg
= to_config_usb_cfg(usb_cfg_ci
);
374 struct usb_composite_dev
*cdev
= cfg
->c
.cdev
;
375 struct gadget_info
*gi
= container_of(cdev
, struct gadget_info
, cdev
);
377 struct config_group
*group
= to_config_group(usb_func_ci
);
378 struct usb_function_instance
*fi
= container_of(group
,
379 struct usb_function_instance
, group
);
380 struct usb_function_instance
*a_fi
;
381 struct usb_function
*f
;
384 mutex_lock(&gi
->lock
);
386 * Make sure this function is from within our _this_ gadget and not
387 * from another gadget or a random directory.
388 * Also a function instance can only be linked once.
390 list_for_each_entry(a_fi
, &gi
->available_func
, cfs_list
) {
399 list_for_each_entry(f
, &cfg
->func_list
, list
) {
406 f
= usb_get_function(fi
);
412 /* stash the function until we bind it to the gadget */
413 list_add_tail(&f
->list
, &cfg
->func_list
);
416 mutex_unlock(&gi
->lock
);
420 static int config_usb_cfg_unlink(
421 struct config_item
*usb_cfg_ci
,
422 struct config_item
*usb_func_ci
)
424 struct config_usb_cfg
*cfg
= to_config_usb_cfg(usb_cfg_ci
);
425 struct usb_composite_dev
*cdev
= cfg
->c
.cdev
;
426 struct gadget_info
*gi
= container_of(cdev
, struct gadget_info
, cdev
);
428 struct config_group
*group
= to_config_group(usb_func_ci
);
429 struct usb_function_instance
*fi
= container_of(group
,
430 struct usb_function_instance
, group
);
431 struct usb_function
*f
;
434 * ideally I would like to forbid to unlink functions while a gadget is
435 * bound to an UDC. Since this isn't possible at the moment, we simply
436 * force an unbind, the function is available here and then we can
437 * remove the function.
439 mutex_lock(&gi
->lock
);
441 unregister_gadget(gi
);
442 WARN_ON(gi
->udc_name
);
444 list_for_each_entry(f
, &cfg
->func_list
, list
) {
448 mutex_unlock(&gi
->lock
);
452 mutex_unlock(&gi
->lock
);
453 WARN(1, "Unable to locate function to unbind\n");
457 CONFIGFS_ATTR_OPS(config_usb_cfg
);
459 static struct configfs_item_operations gadget_config_item_ops
= {
460 .release
= gadget_config_attr_release
,
461 .show_attribute
= config_usb_cfg_attr_show
,
462 .store_attribute
= config_usb_cfg_attr_store
,
463 .allow_link
= config_usb_cfg_link
,
464 .drop_link
= config_usb_cfg_unlink
,
468 static ssize_t
gadget_config_desc_MaxPower_show(struct config_usb_cfg
*cfg
,
471 return sprintf(page
, "%u\n", cfg
->c
.MaxPower
);
474 static ssize_t
gadget_config_desc_MaxPower_store(struct config_usb_cfg
*cfg
,
475 const char *page
, size_t len
)
479 ret
= kstrtou16(page
, 0, &val
);
482 if (DIV_ROUND_UP(val
, 8) > 0xff)
484 cfg
->c
.MaxPower
= val
;
488 static ssize_t
gadget_config_desc_bmAttributes_show(struct config_usb_cfg
*cfg
,
491 return sprintf(page
, "0x%02x\n", cfg
->c
.bmAttributes
);
494 static ssize_t
gadget_config_desc_bmAttributes_store(struct config_usb_cfg
*cfg
,
495 const char *page
, size_t len
)
499 ret
= kstrtou8(page
, 0, &val
);
502 if (!(val
& USB_CONFIG_ATT_ONE
))
504 if (val
& ~(USB_CONFIG_ATT_ONE
| USB_CONFIG_ATT_SELFPOWER
|
505 USB_CONFIG_ATT_WAKEUP
))
507 cfg
->c
.bmAttributes
= val
;
511 #define CFG_CONFIG_DESC_ITEM_ATTR(name) \
512 static struct config_usb_cfg_attribute gadget_usb_cfg_##name = \
513 __CONFIGFS_ATTR(name, S_IRUGO | S_IWUSR, \
514 gadget_config_desc_##name##_show, \
515 gadget_config_desc_##name##_store)
517 CFG_CONFIG_DESC_ITEM_ATTR(MaxPower
);
518 CFG_CONFIG_DESC_ITEM_ATTR(bmAttributes
);
520 static struct configfs_attribute
*gadget_config_attrs
[] = {
521 &gadget_usb_cfg_MaxPower
.attr
,
522 &gadget_usb_cfg_bmAttributes
.attr
,
526 static struct config_item_type gadget_config_type
= {
527 .ct_item_ops
= &gadget_config_item_ops
,
528 .ct_attrs
= gadget_config_attrs
,
529 .ct_owner
= THIS_MODULE
,
532 static struct config_item_type gadget_root_type
= {
533 .ct_item_ops
= &gadget_root_item_ops
,
534 .ct_attrs
= gadget_root_attrs
,
535 .ct_owner
= THIS_MODULE
,
538 static void composite_init_dev(struct usb_composite_dev
*cdev
)
540 spin_lock_init(&cdev
->lock
);
541 INIT_LIST_HEAD(&cdev
->configs
);
542 INIT_LIST_HEAD(&cdev
->gstrings
);
545 static struct config_group
*function_make(
546 struct config_group
*group
,
549 struct gadget_info
*gi
;
550 struct usb_function_instance
*fi
;
551 char buf
[MAX_NAME_LEN
];
556 ret
= snprintf(buf
, MAX_NAME_LEN
, "%s", name
);
557 if (ret
>= MAX_NAME_LEN
)
558 return ERR_PTR(-ENAMETOOLONG
);
561 instance_name
= strchr(func_name
, '.');
562 if (!instance_name
) {
563 pr_err("Unable to locate . in FUNC.INSTANCE\n");
564 return ERR_PTR(-EINVAL
);
566 *instance_name
= '\0';
569 fi
= usb_get_function_instance(func_name
);
573 ret
= config_item_set_name(&fi
->group
.cg_item
, "%s", name
);
575 usb_put_function_instance(fi
);
578 if (fi
->set_inst_name
) {
579 ret
= fi
->set_inst_name(fi
, instance_name
);
581 usb_put_function_instance(fi
);
586 gi
= container_of(group
, struct gadget_info
, functions_group
);
588 mutex_lock(&gi
->lock
);
589 list_add_tail(&fi
->cfs_list
, &gi
->available_func
);
590 mutex_unlock(&gi
->lock
);
594 static void function_drop(
595 struct config_group
*group
,
596 struct config_item
*item
)
598 struct usb_function_instance
*fi
= to_usb_function_instance(item
);
599 struct gadget_info
*gi
;
601 gi
= container_of(group
, struct gadget_info
, functions_group
);
603 mutex_lock(&gi
->lock
);
604 list_del(&fi
->cfs_list
);
605 mutex_unlock(&gi
->lock
);
606 config_item_put(item
);
609 static struct configfs_group_operations functions_ops
= {
610 .make_group
= &function_make
,
611 .drop_item
= &function_drop
,
614 static struct config_item_type functions_type
= {
615 .ct_group_ops
= &functions_ops
,
616 .ct_owner
= THIS_MODULE
,
619 CONFIGFS_ATTR_STRUCT(gadget_config_name
);
620 GS_STRINGS_RW(gadget_config_name
, configuration
);
622 static struct configfs_attribute
*gadget_config_name_langid_attrs
[] = {
623 &gadget_config_name_configuration
.attr
,
627 static void gadget_config_name_attr_release(struct config_item
*item
)
629 struct gadget_config_name
*cn
= to_gadget_config_name(item
);
631 kfree(cn
->configuration
);
637 USB_CONFIG_STRING_RW_OPS(gadget_config_name
);
638 USB_CONFIG_STRINGS_LANG(gadget_config_name
, config_usb_cfg
);
640 static struct config_group
*config_desc_make(
641 struct config_group
*group
,
644 struct gadget_info
*gi
;
645 struct config_usb_cfg
*cfg
;
646 char buf
[MAX_NAME_LEN
];
651 gi
= container_of(group
, struct gadget_info
, configs_group
);
652 ret
= snprintf(buf
, MAX_NAME_LEN
, "%s", name
);
653 if (ret
>= MAX_NAME_LEN
)
654 return ERR_PTR(-ENAMETOOLONG
);
656 num_str
= strchr(buf
, '.');
658 pr_err("Unable to locate . in name.bConfigurationValue\n");
659 return ERR_PTR(-EINVAL
);
666 return ERR_PTR(-EINVAL
);
668 ret
= kstrtou8(num_str
, 0, &num
);
672 cfg
= kzalloc(sizeof(*cfg
), GFP_KERNEL
);
674 return ERR_PTR(-ENOMEM
);
675 cfg
->c
.label
= kstrdup(buf
, GFP_KERNEL
);
680 cfg
->c
.bConfigurationValue
= num
;
681 cfg
->c
.MaxPower
= CONFIG_USB_GADGET_VBUS_DRAW
;
682 cfg
->c
.bmAttributes
= USB_CONFIG_ATT_ONE
;
683 INIT_LIST_HEAD(&cfg
->string_list
);
684 INIT_LIST_HEAD(&cfg
->func_list
);
686 cfg
->group
.default_groups
= cfg
->default_groups
;
687 cfg
->default_groups
[0] = &cfg
->strings_group
;
689 config_group_init_type_name(&cfg
->group
, name
,
690 &gadget_config_type
);
691 config_group_init_type_name(&cfg
->strings_group
, "strings",
692 &gadget_config_name_strings_type
);
694 ret
= usb_add_config_only(&gi
->cdev
, &cfg
->c
);
705 static void config_desc_drop(
706 struct config_group
*group
,
707 struct config_item
*item
)
709 config_item_put(item
);
712 static struct configfs_group_operations config_desc_ops
= {
713 .make_group
= &config_desc_make
,
714 .drop_item
= &config_desc_drop
,
717 static struct config_item_type config_desc_type
= {
718 .ct_group_ops
= &config_desc_ops
,
719 .ct_owner
= THIS_MODULE
,
722 CONFIGFS_ATTR_STRUCT(gadget_strings
);
723 GS_STRINGS_RW(gadget_strings
, manufacturer
);
724 GS_STRINGS_RW(gadget_strings
, product
);
725 GS_STRINGS_RW(gadget_strings
, serialnumber
);
727 static struct configfs_attribute
*gadget_strings_langid_attrs
[] = {
728 &gadget_strings_manufacturer
.attr
,
729 &gadget_strings_product
.attr
,
730 &gadget_strings_serialnumber
.attr
,
734 static void gadget_strings_attr_release(struct config_item
*item
)
736 struct gadget_strings
*gs
= to_gadget_strings(item
);
738 kfree(gs
->manufacturer
);
740 kfree(gs
->serialnumber
);
746 USB_CONFIG_STRING_RW_OPS(gadget_strings
);
747 USB_CONFIG_STRINGS_LANG(gadget_strings
, gadget_info
);
749 static inline struct os_desc
*to_os_desc(struct config_item
*item
)
751 return container_of(to_config_group(item
), struct os_desc
, group
);
754 CONFIGFS_ATTR_STRUCT(os_desc
);
755 CONFIGFS_ATTR_OPS(os_desc
);
757 static ssize_t
os_desc_use_show(struct os_desc
*os_desc
, char *page
)
759 struct gadget_info
*gi
;
761 gi
= to_gadget_info(os_desc
->group
.cg_item
.ci_parent
);
763 return sprintf(page
, "%d", gi
->use_os_desc
);
766 static ssize_t
os_desc_use_store(struct os_desc
*os_desc
, const char *page
,
769 struct gadget_info
*gi
;
773 gi
= to_gadget_info(os_desc
->group
.cg_item
.ci_parent
);
775 mutex_lock(&gi
->lock
);
776 ret
= strtobool(page
, &use
);
778 gi
->use_os_desc
= use
;
781 mutex_unlock(&gi
->lock
);
786 static struct os_desc_attribute os_desc_use
=
787 __CONFIGFS_ATTR(use
, S_IRUGO
| S_IWUSR
,
791 static ssize_t
os_desc_b_vendor_code_show(struct os_desc
*os_desc
, char *page
)
793 struct gadget_info
*gi
;
795 gi
= to_gadget_info(os_desc
->group
.cg_item
.ci_parent
);
797 return sprintf(page
, "%d", gi
->b_vendor_code
);
800 static ssize_t
os_desc_b_vendor_code_store(struct os_desc
*os_desc
,
801 const char *page
, size_t len
)
803 struct gadget_info
*gi
;
807 gi
= to_gadget_info(os_desc
->group
.cg_item
.ci_parent
);
809 mutex_lock(&gi
->lock
);
810 ret
= kstrtou8(page
, 0, &b_vendor_code
);
812 gi
->b_vendor_code
= b_vendor_code
;
815 mutex_unlock(&gi
->lock
);
820 static struct os_desc_attribute os_desc_b_vendor_code
=
821 __CONFIGFS_ATTR(b_vendor_code
, S_IRUGO
| S_IWUSR
,
822 os_desc_b_vendor_code_show
,
823 os_desc_b_vendor_code_store
);
825 static ssize_t
os_desc_qw_sign_show(struct os_desc
*os_desc
, char *page
)
827 struct gadget_info
*gi
;
829 gi
= to_gadget_info(os_desc
->group
.cg_item
.ci_parent
);
831 memcpy(page
, gi
->qw_sign
, OS_STRING_QW_SIGN_LEN
);
833 return OS_STRING_QW_SIGN_LEN
;
836 static ssize_t
os_desc_qw_sign_store(struct os_desc
*os_desc
, const char *page
,
839 struct gadget_info
*gi
;
842 gi
= to_gadget_info(os_desc
->group
.cg_item
.ci_parent
);
843 l
= min((int)len
, OS_STRING_QW_SIGN_LEN
>> 1);
844 if (page
[l
- 1] == '\n')
847 mutex_lock(&gi
->lock
);
848 res
= utf8s_to_utf16s(page
, l
,
849 UTF16_LITTLE_ENDIAN
, (wchar_t *) gi
->qw_sign
,
850 OS_STRING_QW_SIGN_LEN
);
853 mutex_unlock(&gi
->lock
);
858 static struct os_desc_attribute os_desc_qw_sign
=
859 __CONFIGFS_ATTR(qw_sign
, S_IRUGO
| S_IWUSR
,
860 os_desc_qw_sign_show
,
861 os_desc_qw_sign_store
);
863 static struct configfs_attribute
*os_desc_attrs
[] = {
865 &os_desc_b_vendor_code
.attr
,
866 &os_desc_qw_sign
.attr
,
870 static void os_desc_attr_release(struct config_item
*item
)
872 struct os_desc
*os_desc
= to_os_desc(item
);
876 static int os_desc_link(struct config_item
*os_desc_ci
,
877 struct config_item
*usb_cfg_ci
)
879 struct gadget_info
*gi
= container_of(to_config_group(os_desc_ci
),
880 struct gadget_info
, os_desc_group
);
881 struct usb_composite_dev
*cdev
= &gi
->cdev
;
882 struct config_usb_cfg
*c_target
=
883 container_of(to_config_group(usb_cfg_ci
),
884 struct config_usb_cfg
, group
);
885 struct usb_configuration
*c
;
888 mutex_lock(&gi
->lock
);
889 list_for_each_entry(c
, &cdev
->configs
, list
) {
890 if (c
== &c_target
->c
)
893 if (c
!= &c_target
->c
) {
898 if (cdev
->os_desc_config
) {
903 cdev
->os_desc_config
= &c_target
->c
;
907 mutex_unlock(&gi
->lock
);
911 static int os_desc_unlink(struct config_item
*os_desc_ci
,
912 struct config_item
*usb_cfg_ci
)
914 struct gadget_info
*gi
= container_of(to_config_group(os_desc_ci
),
915 struct gadget_info
, os_desc_group
);
916 struct usb_composite_dev
*cdev
= &gi
->cdev
;
918 mutex_lock(&gi
->lock
);
920 unregister_gadget(gi
);
921 cdev
->os_desc_config
= NULL
;
922 WARN_ON(gi
->udc_name
);
923 mutex_unlock(&gi
->lock
);
927 static struct configfs_item_operations os_desc_ops
= {
928 .release
= os_desc_attr_release
,
929 .show_attribute
= os_desc_attr_show
,
930 .store_attribute
= os_desc_attr_store
,
931 .allow_link
= os_desc_link
,
932 .drop_link
= os_desc_unlink
,
935 static struct config_item_type os_desc_type
= {
936 .ct_item_ops
= &os_desc_ops
,
937 .ct_attrs
= os_desc_attrs
,
938 .ct_owner
= THIS_MODULE
,
941 CONFIGFS_ATTR_STRUCT(usb_os_desc
);
942 CONFIGFS_ATTR_OPS(usb_os_desc
);
945 static inline struct usb_os_desc_ext_prop
946 *to_usb_os_desc_ext_prop(struct config_item
*item
)
948 return container_of(item
, struct usb_os_desc_ext_prop
, item
);
951 CONFIGFS_ATTR_STRUCT(usb_os_desc_ext_prop
);
952 CONFIGFS_ATTR_OPS(usb_os_desc_ext_prop
);
954 static ssize_t
ext_prop_type_show(struct usb_os_desc_ext_prop
*ext_prop
,
957 return sprintf(page
, "%d", ext_prop
->type
);
960 static ssize_t
ext_prop_type_store(struct usb_os_desc_ext_prop
*ext_prop
,
961 const char *page
, size_t len
)
963 struct usb_os_desc
*desc
= to_usb_os_desc(ext_prop
->item
.ci_parent
);
967 if (desc
->opts_mutex
)
968 mutex_lock(desc
->opts_mutex
);
969 ret
= kstrtou8(page
, 0, &type
);
972 if (type
< USB_EXT_PROP_UNICODE
|| type
> USB_EXT_PROP_UNICODE_MULTI
) {
977 if ((ext_prop
->type
== USB_EXT_PROP_BINARY
||
978 ext_prop
->type
== USB_EXT_PROP_LE32
||
979 ext_prop
->type
== USB_EXT_PROP_BE32
) &&
980 (type
== USB_EXT_PROP_UNICODE
||
981 type
== USB_EXT_PROP_UNICODE_ENV
||
982 type
== USB_EXT_PROP_UNICODE_LINK
))
983 ext_prop
->data_len
<<= 1;
984 else if ((ext_prop
->type
== USB_EXT_PROP_UNICODE
||
985 ext_prop
->type
== USB_EXT_PROP_UNICODE_ENV
||
986 ext_prop
->type
== USB_EXT_PROP_UNICODE_LINK
) &&
987 (type
== USB_EXT_PROP_BINARY
||
988 type
== USB_EXT_PROP_LE32
||
989 type
== USB_EXT_PROP_BE32
))
990 ext_prop
->data_len
>>= 1;
991 ext_prop
->type
= type
;
995 if (desc
->opts_mutex
)
996 mutex_unlock(desc
->opts_mutex
);
1000 static ssize_t
ext_prop_data_show(struct usb_os_desc_ext_prop
*ext_prop
,
1003 int len
= ext_prop
->data_len
;
1005 if (ext_prop
->type
== USB_EXT_PROP_UNICODE
||
1006 ext_prop
->type
== USB_EXT_PROP_UNICODE_ENV
||
1007 ext_prop
->type
== USB_EXT_PROP_UNICODE_LINK
)
1009 memcpy(page
, ext_prop
->data
, len
);
1014 static ssize_t
ext_prop_data_store(struct usb_os_desc_ext_prop
*ext_prop
,
1015 const char *page
, size_t len
)
1017 struct usb_os_desc
*desc
= to_usb_os_desc(ext_prop
->item
.ci_parent
);
1019 size_t ret_len
= len
;
1021 if (page
[len
- 1] == '\n' || page
[len
- 1] == '\0')
1023 new_data
= kmemdup(page
, len
, GFP_KERNEL
);
1027 if (desc
->opts_mutex
)
1028 mutex_lock(desc
->opts_mutex
);
1029 kfree(ext_prop
->data
);
1030 ext_prop
->data
= new_data
;
1031 desc
->ext_prop_len
-= ext_prop
->data_len
;
1032 ext_prop
->data_len
= len
;
1033 desc
->ext_prop_len
+= ext_prop
->data_len
;
1034 if (ext_prop
->type
== USB_EXT_PROP_UNICODE
||
1035 ext_prop
->type
== USB_EXT_PROP_UNICODE_ENV
||
1036 ext_prop
->type
== USB_EXT_PROP_UNICODE_LINK
) {
1037 desc
->ext_prop_len
-= ext_prop
->data_len
;
1038 ext_prop
->data_len
<<= 1;
1039 ext_prop
->data_len
+= 2;
1040 desc
->ext_prop_len
+= ext_prop
->data_len
;
1042 if (desc
->opts_mutex
)
1043 mutex_unlock(desc
->opts_mutex
);
1047 static struct usb_os_desc_ext_prop_attribute ext_prop_type
=
1048 __CONFIGFS_ATTR(type
, S_IRUGO
| S_IWUSR
,
1049 ext_prop_type_show
, ext_prop_type_store
);
1051 static struct usb_os_desc_ext_prop_attribute ext_prop_data
=
1052 __CONFIGFS_ATTR(data
, S_IRUGO
| S_IWUSR
,
1053 ext_prop_data_show
, ext_prop_data_store
);
1055 static struct configfs_attribute
*ext_prop_attrs
[] = {
1056 &ext_prop_type
.attr
,
1057 &ext_prop_data
.attr
,
1061 static void usb_os_desc_ext_prop_release(struct config_item
*item
)
1063 struct usb_os_desc_ext_prop
*ext_prop
= to_usb_os_desc_ext_prop(item
);
1065 kfree(ext_prop
); /* frees a whole chunk */
1068 static struct configfs_item_operations ext_prop_ops
= {
1069 .release
= usb_os_desc_ext_prop_release
,
1070 .show_attribute
= usb_os_desc_ext_prop_attr_show
,
1071 .store_attribute
= usb_os_desc_ext_prop_attr_store
,
1074 static struct config_item
*ext_prop_make(
1075 struct config_group
*group
,
1078 struct usb_os_desc_ext_prop
*ext_prop
;
1079 struct config_item_type
*ext_prop_type
;
1080 struct usb_os_desc
*desc
;
1083 vla_group(data_chunk
);
1084 vla_item(data_chunk
, struct usb_os_desc_ext_prop
, ext_prop
, 1);
1085 vla_item(data_chunk
, struct config_item_type
, ext_prop_type
, 1);
1087 vlabuf
= kzalloc(vla_group_size(data_chunk
), GFP_KERNEL
);
1089 return ERR_PTR(-ENOMEM
);
1091 ext_prop
= vla_ptr(vlabuf
, data_chunk
, ext_prop
);
1092 ext_prop_type
= vla_ptr(vlabuf
, data_chunk
, ext_prop_type
);
1094 desc
= container_of(group
, struct usb_os_desc
, group
);
1095 ext_prop_type
->ct_item_ops
= &ext_prop_ops
;
1096 ext_prop_type
->ct_attrs
= ext_prop_attrs
;
1097 ext_prop_type
->ct_owner
= desc
->owner
;
1099 config_item_init_type_name(&ext_prop
->item
, name
, ext_prop_type
);
1101 ext_prop
->name
= kstrdup(name
, GFP_KERNEL
);
1102 if (!ext_prop
->name
) {
1104 return ERR_PTR(-ENOMEM
);
1106 desc
->ext_prop_len
+= 14;
1107 ext_prop
->name_len
= 2 * strlen(ext_prop
->name
) + 2;
1108 if (desc
->opts_mutex
)
1109 mutex_lock(desc
->opts_mutex
);
1110 desc
->ext_prop_len
+= ext_prop
->name_len
;
1111 list_add_tail(&ext_prop
->entry
, &desc
->ext_prop
);
1112 ++desc
->ext_prop_count
;
1113 if (desc
->opts_mutex
)
1114 mutex_unlock(desc
->opts_mutex
);
1116 return &ext_prop
->item
;
1119 static void ext_prop_drop(struct config_group
*group
, struct config_item
*item
)
1121 struct usb_os_desc_ext_prop
*ext_prop
= to_usb_os_desc_ext_prop(item
);
1122 struct usb_os_desc
*desc
= to_usb_os_desc(&group
->cg_item
);
1124 if (desc
->opts_mutex
)
1125 mutex_lock(desc
->opts_mutex
);
1126 list_del(&ext_prop
->entry
);
1127 --desc
->ext_prop_count
;
1128 kfree(ext_prop
->name
);
1129 desc
->ext_prop_len
-= (ext_prop
->name_len
+ ext_prop
->data_len
+ 14);
1130 if (desc
->opts_mutex
)
1131 mutex_unlock(desc
->opts_mutex
);
1132 config_item_put(item
);
1135 static struct configfs_group_operations interf_grp_ops
= {
1136 .make_item
= &ext_prop_make
,
1137 .drop_item
= &ext_prop_drop
,
1140 static struct configfs_item_operations interf_item_ops
= {
1141 .show_attribute
= usb_os_desc_attr_show
,
1142 .store_attribute
= usb_os_desc_attr_store
,
1145 static ssize_t
interf_grp_compatible_id_show(struct usb_os_desc
*desc
,
1148 memcpy(page
, desc
->ext_compat_id
, 8);
1152 static ssize_t
interf_grp_compatible_id_store(struct usb_os_desc
*desc
,
1153 const char *page
, size_t len
)
1157 l
= min_t(int, 8, len
);
1158 if (page
[l
- 1] == '\n')
1160 if (desc
->opts_mutex
)
1161 mutex_lock(desc
->opts_mutex
);
1162 memcpy(desc
->ext_compat_id
, page
, l
);
1164 if (desc
->opts_mutex
)
1165 mutex_unlock(desc
->opts_mutex
);
1170 static struct usb_os_desc_attribute interf_grp_attr_compatible_id
=
1171 __CONFIGFS_ATTR(compatible_id
, S_IRUGO
| S_IWUSR
,
1172 interf_grp_compatible_id_show
,
1173 interf_grp_compatible_id_store
);
1175 static ssize_t
interf_grp_sub_compatible_id_show(struct usb_os_desc
*desc
,
1178 memcpy(page
, desc
->ext_compat_id
+ 8, 8);
1182 static ssize_t
interf_grp_sub_compatible_id_store(struct usb_os_desc
*desc
,
1183 const char *page
, size_t len
)
1187 l
= min_t(int, 8, len
);
1188 if (page
[l
- 1] == '\n')
1190 if (desc
->opts_mutex
)
1191 mutex_lock(desc
->opts_mutex
);
1192 memcpy(desc
->ext_compat_id
+ 8, page
, l
);
1194 if (desc
->opts_mutex
)
1195 mutex_unlock(desc
->opts_mutex
);
1200 static struct usb_os_desc_attribute interf_grp_attr_sub_compatible_id
=
1201 __CONFIGFS_ATTR(sub_compatible_id
, S_IRUGO
| S_IWUSR
,
1202 interf_grp_sub_compatible_id_show
,
1203 interf_grp_sub_compatible_id_store
);
1205 static struct configfs_attribute
*interf_grp_attrs
[] = {
1206 &interf_grp_attr_compatible_id
.attr
,
1207 &interf_grp_attr_sub_compatible_id
.attr
,
1211 int usb_os_desc_prepare_interf_dir(struct config_group
*parent
,
1213 struct usb_os_desc
**desc
,
1215 struct module
*owner
)
1217 struct config_group
**f_default_groups
, *os_desc_group
,
1219 struct config_item_type
*os_desc_type
, *interface_type
;
1221 vla_group(data_chunk
);
1222 vla_item(data_chunk
, struct config_group
*, f_default_groups
, 2);
1223 vla_item(data_chunk
, struct config_group
, os_desc_group
, 1);
1224 vla_item(data_chunk
, struct config_group
*, interface_groups
,
1226 vla_item(data_chunk
, struct config_item_type
, os_desc_type
, 1);
1227 vla_item(data_chunk
, struct config_item_type
, interface_type
, 1);
1229 char *vlabuf
= kzalloc(vla_group_size(data_chunk
), GFP_KERNEL
);
1233 f_default_groups
= vla_ptr(vlabuf
, data_chunk
, f_default_groups
);
1234 os_desc_group
= vla_ptr(vlabuf
, data_chunk
, os_desc_group
);
1235 os_desc_type
= vla_ptr(vlabuf
, data_chunk
, os_desc_type
);
1236 interface_groups
= vla_ptr(vlabuf
, data_chunk
, interface_groups
);
1237 interface_type
= vla_ptr(vlabuf
, data_chunk
, interface_type
);
1239 parent
->default_groups
= f_default_groups
;
1240 os_desc_type
->ct_owner
= owner
;
1241 config_group_init_type_name(os_desc_group
, "os_desc", os_desc_type
);
1242 f_default_groups
[0] = os_desc_group
;
1244 os_desc_group
->default_groups
= interface_groups
;
1245 interface_type
->ct_item_ops
= &interf_item_ops
;
1246 interface_type
->ct_group_ops
= &interf_grp_ops
;
1247 interface_type
->ct_attrs
= interf_grp_attrs
;
1248 interface_type
->ct_owner
= owner
;
1250 while (n_interf
--) {
1251 struct usb_os_desc
*d
;
1255 config_group_init_type_name(&d
->group
, "", interface_type
);
1256 config_item_set_name(&d
->group
.cg_item
, "interface.%s",
1258 interface_groups
[n_interf
] = &d
->group
;
1263 EXPORT_SYMBOL(usb_os_desc_prepare_interf_dir
);
1265 static int configfs_do_nothing(struct usb_composite_dev
*cdev
)
1271 int composite_dev_prepare(struct usb_composite_driver
*composite
,
1272 struct usb_composite_dev
*dev
);
1274 int composite_os_desc_req_prepare(struct usb_composite_dev
*cdev
,
1275 struct usb_ep
*ep0
);
1277 static void purge_configs_funcs(struct gadget_info
*gi
)
1279 struct usb_configuration
*c
;
1281 list_for_each_entry(c
, &gi
->cdev
.configs
, list
) {
1282 struct usb_function
*f
, *tmp
;
1283 struct config_usb_cfg
*cfg
;
1285 cfg
= container_of(c
, struct config_usb_cfg
, c
);
1287 list_for_each_entry_safe(f
, tmp
, &c
->functions
, list
) {
1289 list_move_tail(&f
->list
, &cfg
->func_list
);
1291 dev_err(&gi
->cdev
.gadget
->dev
, "unbind function"
1292 " '%s'/%p\n", f
->name
, f
);
1296 c
->next_interface_id
= 0;
1297 memset(c
->interface
, 0, sizeof(c
->interface
));
1304 static int configfs_composite_bind(struct usb_gadget
*gadget
,
1305 struct usb_gadget_driver
*gdriver
)
1307 struct usb_composite_driver
*composite
= to_cdriver(gdriver
);
1308 struct gadget_info
*gi
= container_of(composite
,
1309 struct gadget_info
, composite
);
1310 struct usb_composite_dev
*cdev
= &gi
->cdev
;
1311 struct usb_configuration
*c
;
1312 struct usb_string
*s
;
1316 /* the gi->lock is hold by the caller */
1317 cdev
->gadget
= gadget
;
1318 set_gadget_data(gadget
, cdev
);
1319 ret
= composite_dev_prepare(composite
, cdev
);
1322 /* and now the gadget bind */
1325 if (list_empty(&gi
->cdev
.configs
)) {
1326 pr_err("Need at least one configuration in %s.\n",
1327 gi
->composite
.name
);
1328 goto err_comp_cleanup
;
1332 list_for_each_entry(c
, &gi
->cdev
.configs
, list
) {
1333 struct config_usb_cfg
*cfg
;
1335 cfg
= container_of(c
, struct config_usb_cfg
, c
);
1336 if (list_empty(&cfg
->func_list
)) {
1337 pr_err("Config %s/%d of %s needs at least one function.\n",
1338 c
->label
, c
->bConfigurationValue
,
1339 gi
->composite
.name
);
1340 goto err_comp_cleanup
;
1344 /* init all strings */
1345 if (!list_empty(&gi
->string_list
)) {
1346 struct gadget_strings
*gs
;
1349 list_for_each_entry(gs
, &gi
->string_list
, list
) {
1351 gi
->gstrings
[i
] = &gs
->stringtab_dev
;
1352 gs
->stringtab_dev
.strings
= gs
->strings
;
1353 gs
->strings
[USB_GADGET_MANUFACTURER_IDX
].s
=
1355 gs
->strings
[USB_GADGET_PRODUCT_IDX
].s
= gs
->product
;
1356 gs
->strings
[USB_GADGET_SERIAL_IDX
].s
= gs
->serialnumber
;
1359 gi
->gstrings
[i
] = NULL
;
1360 s
= usb_gstrings_attach(&gi
->cdev
, gi
->gstrings
,
1361 USB_GADGET_FIRST_AVAIL_IDX
);
1364 goto err_comp_cleanup
;
1367 gi
->cdev
.desc
.iManufacturer
= s
[USB_GADGET_MANUFACTURER_IDX
].id
;
1368 gi
->cdev
.desc
.iProduct
= s
[USB_GADGET_PRODUCT_IDX
].id
;
1369 gi
->cdev
.desc
.iSerialNumber
= s
[USB_GADGET_SERIAL_IDX
].id
;
1372 if (gi
->use_os_desc
) {
1373 cdev
->use_os_string
= true;
1374 cdev
->b_vendor_code
= gi
->b_vendor_code
;
1375 memcpy(cdev
->qw_sign
, gi
->qw_sign
, OS_STRING_QW_SIGN_LEN
);
1378 if (gadget_is_otg(gadget
) && !otg_desc
[0]) {
1379 struct usb_descriptor_header
*usb_desc
;
1381 usb_desc
= usb_otg_descriptor_alloc(gadget
);
1384 goto err_comp_cleanup
;
1386 usb_otg_descriptor_init(gadget
, usb_desc
);
1387 otg_desc
[0] = usb_desc
;
1391 /* Go through all configs, attach all functions */
1392 list_for_each_entry(c
, &gi
->cdev
.configs
, list
) {
1393 struct config_usb_cfg
*cfg
;
1394 struct usb_function
*f
;
1395 struct usb_function
*tmp
;
1396 struct gadget_config_name
*cn
;
1398 if (gadget_is_otg(gadget
))
1399 c
->descriptors
= otg_desc
;
1401 cfg
= container_of(c
, struct config_usb_cfg
, c
);
1402 if (!list_empty(&cfg
->string_list
)) {
1404 list_for_each_entry(cn
, &cfg
->string_list
, list
) {
1405 cfg
->gstrings
[i
] = &cn
->stringtab_dev
;
1406 cn
->stringtab_dev
.strings
= &cn
->strings
;
1407 cn
->strings
.s
= cn
->configuration
;
1410 cfg
->gstrings
[i
] = NULL
;
1411 s
= usb_gstrings_attach(&gi
->cdev
, cfg
->gstrings
, 1);
1414 goto err_comp_cleanup
;
1416 c
->iConfiguration
= s
[0].id
;
1419 list_for_each_entry_safe(f
, tmp
, &cfg
->func_list
, list
) {
1421 ret
= usb_add_function(c
, f
);
1423 list_add(&f
->list
, &cfg
->func_list
);
1424 goto err_purge_funcs
;
1427 usb_ep_autoconfig_reset(cdev
->gadget
);
1429 if (cdev
->use_os_string
) {
1430 ret
= composite_os_desc_req_prepare(cdev
, gadget
->ep0
);
1432 goto err_purge_funcs
;
1435 usb_ep_autoconfig_reset(cdev
->gadget
);
1439 purge_configs_funcs(gi
);
1441 composite_dev_cleanup(cdev
);
1445 static void configfs_composite_unbind(struct usb_gadget
*gadget
)
1447 struct usb_composite_dev
*cdev
;
1448 struct gadget_info
*gi
;
1450 /* the gi->lock is hold by the caller */
1452 cdev
= get_gadget_data(gadget
);
1453 gi
= container_of(cdev
, struct gadget_info
, cdev
);
1457 purge_configs_funcs(gi
);
1458 composite_dev_cleanup(cdev
);
1459 usb_ep_autoconfig_reset(cdev
->gadget
);
1460 cdev
->gadget
= NULL
;
1461 set_gadget_data(gadget
, NULL
);
1464 static const struct usb_gadget_driver configfs_driver_template
= {
1465 .bind
= configfs_composite_bind
,
1466 .unbind
= configfs_composite_unbind
,
1468 .setup
= composite_setup
,
1469 .reset
= composite_disconnect
,
1470 .disconnect
= composite_disconnect
,
1472 .suspend
= composite_suspend
,
1473 .resume
= composite_resume
,
1475 .max_speed
= USB_SPEED_SUPER
,
1477 .owner
= THIS_MODULE
,
1478 .name
= "configfs-gadget",
1482 static struct config_group
*gadgets_make(
1483 struct config_group
*group
,
1486 struct gadget_info
*gi
;
1488 gi
= kzalloc(sizeof(*gi
), GFP_KERNEL
);
1490 return ERR_PTR(-ENOMEM
);
1492 gi
->group
.default_groups
= gi
->default_groups
;
1493 gi
->group
.default_groups
[0] = &gi
->functions_group
;
1494 gi
->group
.default_groups
[1] = &gi
->configs_group
;
1495 gi
->group
.default_groups
[2] = &gi
->strings_group
;
1496 gi
->group
.default_groups
[3] = &gi
->os_desc_group
;
1498 config_group_init_type_name(&gi
->functions_group
, "functions",
1500 config_group_init_type_name(&gi
->configs_group
, "configs",
1502 config_group_init_type_name(&gi
->strings_group
, "strings",
1503 &gadget_strings_strings_type
);
1504 config_group_init_type_name(&gi
->os_desc_group
, "os_desc",
1507 gi
->composite
.bind
= configfs_do_nothing
;
1508 gi
->composite
.unbind
= configfs_do_nothing
;
1509 gi
->composite
.suspend
= NULL
;
1510 gi
->composite
.resume
= NULL
;
1511 gi
->composite
.max_speed
= USB_SPEED_SUPER
;
1513 mutex_init(&gi
->lock
);
1514 INIT_LIST_HEAD(&gi
->string_list
);
1515 INIT_LIST_HEAD(&gi
->available_func
);
1517 composite_init_dev(&gi
->cdev
);
1518 gi
->cdev
.desc
.bLength
= USB_DT_DEVICE_SIZE
;
1519 gi
->cdev
.desc
.bDescriptorType
= USB_DT_DEVICE
;
1520 gi
->cdev
.desc
.bcdDevice
= cpu_to_le16(get_default_bcdDevice());
1522 gi
->composite
.gadget_driver
= configfs_driver_template
;
1524 gi
->composite
.gadget_driver
.function
= kstrdup(name
, GFP_KERNEL
);
1525 gi
->composite
.name
= gi
->composite
.gadget_driver
.function
;
1527 if (!gi
->composite
.gadget_driver
.function
)
1530 config_group_init_type_name(&gi
->group
, name
,
1535 return ERR_PTR(-ENOMEM
);
1538 static void gadgets_drop(struct config_group
*group
, struct config_item
*item
)
1540 config_item_put(item
);
1543 static struct configfs_group_operations gadgets_ops
= {
1544 .make_group
= &gadgets_make
,
1545 .drop_item
= &gadgets_drop
,
1548 static struct config_item_type gadgets_type
= {
1549 .ct_group_ops
= &gadgets_ops
,
1550 .ct_owner
= THIS_MODULE
,
1553 static struct configfs_subsystem gadget_subsys
= {
1556 .ci_namebuf
= "usb_gadget",
1557 .ci_type
= &gadgets_type
,
1560 .su_mutex
= __MUTEX_INITIALIZER(gadget_subsys
.su_mutex
),
1563 void unregister_gadget_item(struct config_item
*item
)
1565 struct gadget_info
*gi
= to_gadget_info(item
);
1567 unregister_gadget(gi
);
1569 EXPORT_SYMBOL_GPL(unregister_gadget_item
);
1571 static int __init
gadget_cfs_init(void)
1575 config_group_init(&gadget_subsys
.su_group
);
1577 ret
= configfs_register_subsystem(&gadget_subsys
);
1580 module_init(gadget_cfs_init
);
1582 static void __exit
gadget_cfs_exit(void)
1584 configfs_unregister_subsystem(&gadget_subsys
);
1586 module_exit(gadget_cfs_exit
);