Commit | Line | Data |
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5fd54ace | 1 | // SPDX-License-Identifier: GPL-2.0 |
88af8bbe SAS |
2 | #include <linux/configfs.h> |
3 | #include <linux/module.h> | |
4 | #include <linux/slab.h> | |
5 | #include <linux/device.h> | |
87213d38 | 6 | #include <linux/nls.h> |
88af8bbe SAS |
7 | #include <linux/usb/composite.h> |
8 | #include <linux/usb/gadget_configfs.h> | |
0009e99a | 9 | #include "configfs.h" |
da424314 | 10 | #include "u_f.h" |
7419485f | 11 | #include "u_os_desc.h" |
88af8bbe SAS |
12 | |
13 | int check_user_usb_string(const char *name, | |
14 | struct usb_gadget_strings *stringtab_dev) | |
15 | { | |
16 | unsigned primary_lang; | |
17 | unsigned sub_lang; | |
18 | u16 num; | |
19 | int ret; | |
20 | ||
21 | ret = kstrtou16(name, 0, &num); | |
22 | if (ret) | |
23 | return ret; | |
24 | ||
25 | primary_lang = num & 0x3ff; | |
26 | sub_lang = num >> 10; | |
27 | ||
28 | /* simple sanity check for valid langid */ | |
29 | switch (primary_lang) { | |
30 | case 0: | |
31 | case 0x62 ... 0xfe: | |
32 | case 0x100 ... 0x3ff: | |
33 | return -EINVAL; | |
34 | } | |
35 | if (!sub_lang) | |
36 | return -EINVAL; | |
37 | ||
38 | stringtab_dev->language = num; | |
39 | return 0; | |
40 | } | |
41 | ||
42 | #define MAX_NAME_LEN 40 | |
43 | #define MAX_USB_STRING_LANGS 2 | |
44 | ||
41ce84c8 LJ |
45 | static const struct usb_descriptor_header *otg_desc[2]; |
46 | ||
88af8bbe SAS |
47 | struct gadget_info { |
48 | struct config_group group; | |
49 | struct config_group functions_group; | |
50 | struct config_group configs_group; | |
51 | struct config_group strings_group; | |
87213d38 | 52 | struct config_group os_desc_group; |
88af8bbe SAS |
53 | |
54 | struct mutex lock; | |
55 | struct usb_gadget_strings *gstrings[MAX_USB_STRING_LANGS + 1]; | |
56 | struct list_head string_list; | |
57 | struct list_head available_func; | |
58 | ||
88af8bbe SAS |
59 | struct usb_composite_driver composite; |
60 | struct usb_composite_dev cdev; | |
87213d38 AP |
61 | bool use_os_desc; |
62 | char b_vendor_code; | |
63 | char qw_sign[OS_STRING_QW_SIGN_LEN]; | |
1a1c851b PC |
64 | spinlock_t spinlock; |
65 | bool unbind; | |
88af8bbe SAS |
66 | }; |
67 | ||
45b6a73f CH |
68 | static inline struct gadget_info *to_gadget_info(struct config_item *item) |
69 | { | |
70 | return container_of(to_config_group(item), struct gadget_info, group); | |
71 | } | |
72 | ||
88af8bbe SAS |
73 | struct config_usb_cfg { |
74 | struct config_group group; | |
75 | struct config_group strings_group; | |
88af8bbe SAS |
76 | struct list_head string_list; |
77 | struct usb_configuration c; | |
78 | struct list_head func_list; | |
79 | struct usb_gadget_strings *gstrings[MAX_USB_STRING_LANGS + 1]; | |
80 | }; | |
81 | ||
45b6a73f CH |
82 | static inline struct config_usb_cfg *to_config_usb_cfg(struct config_item *item) |
83 | { | |
84 | return container_of(to_config_group(item), struct config_usb_cfg, | |
85 | group); | |
86 | } | |
87 | ||
88af8bbe SAS |
88 | struct gadget_strings { |
89 | struct usb_gadget_strings stringtab_dev; | |
90 | struct usb_string strings[USB_GADGET_FIRST_AVAIL_IDX]; | |
91 | char *manufacturer; | |
92 | char *product; | |
93 | char *serialnumber; | |
94 | ||
95 | struct config_group group; | |
96 | struct list_head list; | |
97 | }; | |
98 | ||
87213d38 AP |
99 | struct os_desc { |
100 | struct config_group group; | |
101 | }; | |
102 | ||
88af8bbe SAS |
103 | struct gadget_config_name { |
104 | struct usb_gadget_strings stringtab_dev; | |
105 | struct usb_string strings; | |
106 | char *configuration; | |
107 | ||
108 | struct config_group group; | |
109 | struct list_head list; | |
110 | }; | |
111 | ||
112 | static int usb_string_copy(const char *s, char **s_copy) | |
113 | { | |
114 | int ret; | |
115 | char *str; | |
116 | char *copy = *s_copy; | |
117 | ret = strlen(s); | |
118 | if (ret > 126) | |
119 | return -EOVERFLOW; | |
120 | ||
121 | str = kstrdup(s, GFP_KERNEL); | |
122 | if (!str) | |
123 | return -ENOMEM; | |
124 | if (str[ret - 1] == '\n') | |
125 | str[ret - 1] = '\0'; | |
126 | kfree(copy); | |
127 | *s_copy = str; | |
128 | return 0; | |
129 | } | |
130 | ||
88af8bbe | 131 | #define GI_DEVICE_DESC_SIMPLE_R_u8(__name) \ |
45b6a73f | 132 | static ssize_t gadget_dev_desc_##__name##_show(struct config_item *item, \ |
88af8bbe SAS |
133 | char *page) \ |
134 | { \ | |
45b6a73f CH |
135 | return sprintf(page, "0x%02x\n", \ |
136 | to_gadget_info(item)->cdev.desc.__name); \ | |
88af8bbe SAS |
137 | } |
138 | ||
139 | #define GI_DEVICE_DESC_SIMPLE_R_u16(__name) \ | |
45b6a73f | 140 | static ssize_t gadget_dev_desc_##__name##_show(struct config_item *item, \ |
88af8bbe SAS |
141 | char *page) \ |
142 | { \ | |
45b6a73f CH |
143 | return sprintf(page, "0x%04x\n", \ |
144 | le16_to_cpup(&to_gadget_info(item)->cdev.desc.__name)); \ | |
88af8bbe SAS |
145 | } |
146 | ||
147 | ||
148 | #define GI_DEVICE_DESC_SIMPLE_W_u8(_name) \ | |
45b6a73f | 149 | static ssize_t gadget_dev_desc_##_name##_store(struct config_item *item, \ |
88af8bbe SAS |
150 | const char *page, size_t len) \ |
151 | { \ | |
152 | u8 val; \ | |
153 | int ret; \ | |
154 | ret = kstrtou8(page, 0, &val); \ | |
155 | if (ret) \ | |
156 | return ret; \ | |
45b6a73f | 157 | to_gadget_info(item)->cdev.desc._name = val; \ |
88af8bbe SAS |
158 | return len; \ |
159 | } | |
160 | ||
161 | #define GI_DEVICE_DESC_SIMPLE_W_u16(_name) \ | |
45b6a73f | 162 | static ssize_t gadget_dev_desc_##_name##_store(struct config_item *item, \ |
88af8bbe SAS |
163 | const char *page, size_t len) \ |
164 | { \ | |
165 | u16 val; \ | |
166 | int ret; \ | |
167 | ret = kstrtou16(page, 0, &val); \ | |
168 | if (ret) \ | |
169 | return ret; \ | |
45b6a73f | 170 | to_gadget_info(item)->cdev.desc._name = cpu_to_le16p(&val); \ |
88af8bbe SAS |
171 | return len; \ |
172 | } | |
173 | ||
174 | #define GI_DEVICE_DESC_SIMPLE_RW(_name, _type) \ | |
175 | GI_DEVICE_DESC_SIMPLE_R_##_type(_name) \ | |
176 | GI_DEVICE_DESC_SIMPLE_W_##_type(_name) | |
177 | ||
178 | GI_DEVICE_DESC_SIMPLE_R_u16(bcdUSB); | |
179 | GI_DEVICE_DESC_SIMPLE_RW(bDeviceClass, u8); | |
180 | GI_DEVICE_DESC_SIMPLE_RW(bDeviceSubClass, u8); | |
181 | GI_DEVICE_DESC_SIMPLE_RW(bDeviceProtocol, u8); | |
182 | GI_DEVICE_DESC_SIMPLE_RW(bMaxPacketSize0, u8); | |
183 | GI_DEVICE_DESC_SIMPLE_RW(idVendor, u16); | |
184 | GI_DEVICE_DESC_SIMPLE_RW(idProduct, u16); | |
185 | GI_DEVICE_DESC_SIMPLE_R_u16(bcdDevice); | |
186 | ||
187 | static ssize_t is_valid_bcd(u16 bcd_val) | |
188 | { | |
189 | if ((bcd_val & 0xf) > 9) | |
190 | return -EINVAL; | |
191 | if (((bcd_val >> 4) & 0xf) > 9) | |
192 | return -EINVAL; | |
193 | if (((bcd_val >> 8) & 0xf) > 9) | |
194 | return -EINVAL; | |
195 | if (((bcd_val >> 12) & 0xf) > 9) | |
196 | return -EINVAL; | |
197 | return 0; | |
198 | } | |
199 | ||
45b6a73f | 200 | static ssize_t gadget_dev_desc_bcdDevice_store(struct config_item *item, |
88af8bbe SAS |
201 | const char *page, size_t len) |
202 | { | |
203 | u16 bcdDevice; | |
204 | int ret; | |
205 | ||
206 | ret = kstrtou16(page, 0, &bcdDevice); | |
207 | if (ret) | |
208 | return ret; | |
209 | ret = is_valid_bcd(bcdDevice); | |
210 | if (ret) | |
211 | return ret; | |
212 | ||
45b6a73f | 213 | to_gadget_info(item)->cdev.desc.bcdDevice = cpu_to_le16(bcdDevice); |
88af8bbe SAS |
214 | return len; |
215 | } | |
216 | ||
45b6a73f | 217 | static ssize_t gadget_dev_desc_bcdUSB_store(struct config_item *item, |
88af8bbe SAS |
218 | const char *page, size_t len) |
219 | { | |
220 | u16 bcdUSB; | |
221 | int ret; | |
222 | ||
223 | ret = kstrtou16(page, 0, &bcdUSB); | |
224 | if (ret) | |
225 | return ret; | |
226 | ret = is_valid_bcd(bcdUSB); | |
227 | if (ret) | |
228 | return ret; | |
229 | ||
45b6a73f | 230 | to_gadget_info(item)->cdev.desc.bcdUSB = cpu_to_le16(bcdUSB); |
88af8bbe SAS |
231 | return len; |
232 | } | |
233 | ||
45b6a73f | 234 | static ssize_t gadget_dev_desc_UDC_show(struct config_item *item, char *page) |
88af8bbe | 235 | { |
afdaadc3 RB |
236 | char *udc_name = to_gadget_info(item)->composite.gadget_driver.udc_name; |
237 | ||
238 | return sprintf(page, "%s\n", udc_name ?: ""); | |
88af8bbe SAS |
239 | } |
240 | ||
241 | static int unregister_gadget(struct gadget_info *gi) | |
242 | { | |
243 | int ret; | |
244 | ||
afdaadc3 | 245 | if (!gi->composite.gadget_driver.udc_name) |
88af8bbe SAS |
246 | return -ENODEV; |
247 | ||
248 | ret = usb_gadget_unregister_driver(&gi->composite.gadget_driver); | |
249 | if (ret) | |
250 | return ret; | |
afdaadc3 RB |
251 | kfree(gi->composite.gadget_driver.udc_name); |
252 | gi->composite.gadget_driver.udc_name = NULL; | |
88af8bbe SAS |
253 | return 0; |
254 | } | |
255 | ||
45b6a73f | 256 | static ssize_t gadget_dev_desc_UDC_store(struct config_item *item, |
88af8bbe SAS |
257 | const char *page, size_t len) |
258 | { | |
45b6a73f | 259 | struct gadget_info *gi = to_gadget_info(item); |
88af8bbe SAS |
260 | char *name; |
261 | int ret; | |
262 | ||
263 | name = kstrdup(page, GFP_KERNEL); | |
264 | if (!name) | |
265 | return -ENOMEM; | |
266 | if (name[len - 1] == '\n') | |
267 | name[len - 1] = '\0'; | |
268 | ||
269 | mutex_lock(&gi->lock); | |
270 | ||
271 | if (!strlen(name)) { | |
272 | ret = unregister_gadget(gi); | |
273 | if (ret) | |
274 | goto err; | |
38355b2a | 275 | kfree(name); |
88af8bbe | 276 | } else { |
afdaadc3 | 277 | if (gi->composite.gadget_driver.udc_name) { |
88af8bbe SAS |
278 | ret = -EBUSY; |
279 | goto err; | |
280 | } | |
afdaadc3 RB |
281 | gi->composite.gadget_driver.udc_name = name; |
282 | ret = usb_gadget_probe_driver(&gi->composite.gadget_driver); | |
283 | if (ret) { | |
284 | gi->composite.gadget_driver.udc_name = NULL; | |
88af8bbe | 285 | goto err; |
afdaadc3 | 286 | } |
88af8bbe SAS |
287 | } |
288 | mutex_unlock(&gi->lock); | |
289 | return len; | |
290 | err: | |
291 | kfree(name); | |
292 | mutex_unlock(&gi->lock); | |
293 | return ret; | |
294 | } | |
295 | ||
45b6a73f CH |
296 | CONFIGFS_ATTR(gadget_dev_desc_, bDeviceClass); |
297 | CONFIGFS_ATTR(gadget_dev_desc_, bDeviceSubClass); | |
298 | CONFIGFS_ATTR(gadget_dev_desc_, bDeviceProtocol); | |
299 | CONFIGFS_ATTR(gadget_dev_desc_, bMaxPacketSize0); | |
300 | CONFIGFS_ATTR(gadget_dev_desc_, idVendor); | |
301 | CONFIGFS_ATTR(gadget_dev_desc_, idProduct); | |
302 | CONFIGFS_ATTR(gadget_dev_desc_, bcdDevice); | |
303 | CONFIGFS_ATTR(gadget_dev_desc_, bcdUSB); | |
304 | CONFIGFS_ATTR(gadget_dev_desc_, UDC); | |
88af8bbe SAS |
305 | |
306 | static struct configfs_attribute *gadget_root_attrs[] = { | |
45b6a73f CH |
307 | &gadget_dev_desc_attr_bDeviceClass, |
308 | &gadget_dev_desc_attr_bDeviceSubClass, | |
309 | &gadget_dev_desc_attr_bDeviceProtocol, | |
310 | &gadget_dev_desc_attr_bMaxPacketSize0, | |
311 | &gadget_dev_desc_attr_idVendor, | |
312 | &gadget_dev_desc_attr_idProduct, | |
313 | &gadget_dev_desc_attr_bcdDevice, | |
314 | &gadget_dev_desc_attr_bcdUSB, | |
315 | &gadget_dev_desc_attr_UDC, | |
88af8bbe SAS |
316 | NULL, |
317 | }; | |
318 | ||
88af8bbe SAS |
319 | static inline struct gadget_strings *to_gadget_strings(struct config_item *item) |
320 | { | |
321 | return container_of(to_config_group(item), struct gadget_strings, | |
322 | group); | |
323 | } | |
324 | ||
325 | static inline struct gadget_config_name *to_gadget_config_name( | |
326 | struct config_item *item) | |
327 | { | |
328 | return container_of(to_config_group(item), struct gadget_config_name, | |
329 | group); | |
330 | } | |
331 | ||
88af8bbe SAS |
332 | static inline struct usb_function_instance *to_usb_function_instance( |
333 | struct config_item *item) | |
334 | { | |
335 | return container_of(to_config_group(item), | |
336 | struct usb_function_instance, group); | |
337 | } | |
338 | ||
339 | static void gadget_info_attr_release(struct config_item *item) | |
340 | { | |
341 | struct gadget_info *gi = to_gadget_info(item); | |
342 | ||
343 | WARN_ON(!list_empty(&gi->cdev.configs)); | |
344 | WARN_ON(!list_empty(&gi->string_list)); | |
345 | WARN_ON(!list_empty(&gi->available_func)); | |
346 | kfree(gi->composite.gadget_driver.function); | |
347 | kfree(gi); | |
348 | } | |
349 | ||
88af8bbe SAS |
350 | static struct configfs_item_operations gadget_root_item_ops = { |
351 | .release = gadget_info_attr_release, | |
88af8bbe SAS |
352 | }; |
353 | ||
354 | static void gadget_config_attr_release(struct config_item *item) | |
355 | { | |
356 | struct config_usb_cfg *cfg = to_config_usb_cfg(item); | |
357 | ||
358 | WARN_ON(!list_empty(&cfg->c.functions)); | |
359 | list_del(&cfg->c.list); | |
360 | kfree(cfg->c.label); | |
361 | kfree(cfg); | |
362 | } | |
363 | ||
364 | static int config_usb_cfg_link( | |
365 | struct config_item *usb_cfg_ci, | |
366 | struct config_item *usb_func_ci) | |
367 | { | |
368 | struct config_usb_cfg *cfg = to_config_usb_cfg(usb_cfg_ci); | |
369 | struct usb_composite_dev *cdev = cfg->c.cdev; | |
370 | struct gadget_info *gi = container_of(cdev, struct gadget_info, cdev); | |
371 | ||
372 | struct config_group *group = to_config_group(usb_func_ci); | |
373 | struct usb_function_instance *fi = container_of(group, | |
374 | struct usb_function_instance, group); | |
375 | struct usb_function_instance *a_fi; | |
376 | struct usb_function *f; | |
377 | int ret; | |
378 | ||
379 | mutex_lock(&gi->lock); | |
380 | /* | |
381 | * Make sure this function is from within our _this_ gadget and not | |
382 | * from another gadget or a random directory. | |
383 | * Also a function instance can only be linked once. | |
384 | */ | |
385 | list_for_each_entry(a_fi, &gi->available_func, cfs_list) { | |
386 | if (a_fi == fi) | |
387 | break; | |
388 | } | |
389 | if (a_fi != fi) { | |
390 | ret = -EINVAL; | |
391 | goto out; | |
392 | } | |
393 | ||
394 | list_for_each_entry(f, &cfg->func_list, list) { | |
395 | if (f->fi == fi) { | |
396 | ret = -EEXIST; | |
397 | goto out; | |
398 | } | |
399 | } | |
400 | ||
401 | f = usb_get_function(fi); | |
402 | if (IS_ERR(f)) { | |
403 | ret = PTR_ERR(f); | |
404 | goto out; | |
405 | } | |
406 | ||
407 | /* stash the function until we bind it to the gadget */ | |
408 | list_add_tail(&f->list, &cfg->func_list); | |
409 | ret = 0; | |
410 | out: | |
411 | mutex_unlock(&gi->lock); | |
412 | return ret; | |
413 | } | |
414 | ||
e16769d4 | 415 | static void config_usb_cfg_unlink( |
88af8bbe SAS |
416 | struct config_item *usb_cfg_ci, |
417 | struct config_item *usb_func_ci) | |
418 | { | |
419 | struct config_usb_cfg *cfg = to_config_usb_cfg(usb_cfg_ci); | |
420 | struct usb_composite_dev *cdev = cfg->c.cdev; | |
421 | struct gadget_info *gi = container_of(cdev, struct gadget_info, cdev); | |
422 | ||
423 | struct config_group *group = to_config_group(usb_func_ci); | |
424 | struct usb_function_instance *fi = container_of(group, | |
425 | struct usb_function_instance, group); | |
426 | struct usb_function *f; | |
427 | ||
428 | /* | |
429 | * ideally I would like to forbid to unlink functions while a gadget is | |
430 | * bound to an UDC. Since this isn't possible at the moment, we simply | |
431 | * force an unbind, the function is available here and then we can | |
432 | * remove the function. | |
433 | */ | |
434 | mutex_lock(&gi->lock); | |
afdaadc3 | 435 | if (gi->composite.gadget_driver.udc_name) |
88af8bbe | 436 | unregister_gadget(gi); |
afdaadc3 | 437 | WARN_ON(gi->composite.gadget_driver.udc_name); |
88af8bbe SAS |
438 | |
439 | list_for_each_entry(f, &cfg->func_list, list) { | |
440 | if (f->fi == fi) { | |
441 | list_del(&f->list); | |
442 | usb_put_function(f); | |
443 | mutex_unlock(&gi->lock); | |
e16769d4 | 444 | return; |
88af8bbe SAS |
445 | } |
446 | } | |
447 | mutex_unlock(&gi->lock); | |
75bfe23a | 448 | WARN(1, "Unable to locate function to unbind\n"); |
88af8bbe SAS |
449 | } |
450 | ||
88af8bbe SAS |
451 | static struct configfs_item_operations gadget_config_item_ops = { |
452 | .release = gadget_config_attr_release, | |
88af8bbe SAS |
453 | .allow_link = config_usb_cfg_link, |
454 | .drop_link = config_usb_cfg_unlink, | |
455 | }; | |
456 | ||
457 | ||
45b6a73f | 458 | static ssize_t gadget_config_desc_MaxPower_show(struct config_item *item, |
88af8bbe SAS |
459 | char *page) |
460 | { | |
45b6a73f | 461 | return sprintf(page, "%u\n", to_config_usb_cfg(item)->c.MaxPower); |
88af8bbe SAS |
462 | } |
463 | ||
45b6a73f | 464 | static ssize_t gadget_config_desc_MaxPower_store(struct config_item *item, |
88af8bbe SAS |
465 | const char *page, size_t len) |
466 | { | |
467 | u16 val; | |
468 | int ret; | |
469 | ret = kstrtou16(page, 0, &val); | |
470 | if (ret) | |
471 | return ret; | |
472 | if (DIV_ROUND_UP(val, 8) > 0xff) | |
473 | return -ERANGE; | |
45b6a73f | 474 | to_config_usb_cfg(item)->c.MaxPower = val; |
88af8bbe SAS |
475 | return len; |
476 | } | |
477 | ||
45b6a73f | 478 | static ssize_t gadget_config_desc_bmAttributes_show(struct config_item *item, |
88af8bbe SAS |
479 | char *page) |
480 | { | |
45b6a73f CH |
481 | return sprintf(page, "0x%02x\n", |
482 | to_config_usb_cfg(item)->c.bmAttributes); | |
88af8bbe SAS |
483 | } |
484 | ||
45b6a73f | 485 | static ssize_t gadget_config_desc_bmAttributes_store(struct config_item *item, |
88af8bbe SAS |
486 | const char *page, size_t len) |
487 | { | |
488 | u8 val; | |
489 | int ret; | |
490 | ret = kstrtou8(page, 0, &val); | |
491 | if (ret) | |
492 | return ret; | |
493 | if (!(val & USB_CONFIG_ATT_ONE)) | |
494 | return -EINVAL; | |
495 | if (val & ~(USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER | | |
496 | USB_CONFIG_ATT_WAKEUP)) | |
497 | return -EINVAL; | |
45b6a73f | 498 | to_config_usb_cfg(item)->c.bmAttributes = val; |
88af8bbe SAS |
499 | return len; |
500 | } | |
501 | ||
45b6a73f CH |
502 | CONFIGFS_ATTR(gadget_config_desc_, MaxPower); |
503 | CONFIGFS_ATTR(gadget_config_desc_, bmAttributes); | |
88af8bbe SAS |
504 | |
505 | static struct configfs_attribute *gadget_config_attrs[] = { | |
45b6a73f CH |
506 | &gadget_config_desc_attr_MaxPower, |
507 | &gadget_config_desc_attr_bmAttributes, | |
88af8bbe SAS |
508 | NULL, |
509 | }; | |
510 | ||
4ad01412 | 511 | static const struct config_item_type gadget_config_type = { |
88af8bbe SAS |
512 | .ct_item_ops = &gadget_config_item_ops, |
513 | .ct_attrs = gadget_config_attrs, | |
514 | .ct_owner = THIS_MODULE, | |
515 | }; | |
516 | ||
4ad01412 | 517 | static const struct config_item_type gadget_root_type = { |
88af8bbe SAS |
518 | .ct_item_ops = &gadget_root_item_ops, |
519 | .ct_attrs = gadget_root_attrs, | |
520 | .ct_owner = THIS_MODULE, | |
521 | }; | |
522 | ||
523 | static void composite_init_dev(struct usb_composite_dev *cdev) | |
524 | { | |
525 | spin_lock_init(&cdev->lock); | |
526 | INIT_LIST_HEAD(&cdev->configs); | |
527 | INIT_LIST_HEAD(&cdev->gstrings); | |
528 | } | |
529 | ||
530 | static struct config_group *function_make( | |
531 | struct config_group *group, | |
532 | const char *name) | |
533 | { | |
534 | struct gadget_info *gi; | |
535 | struct usb_function_instance *fi; | |
536 | char buf[MAX_NAME_LEN]; | |
537 | char *func_name; | |
538 | char *instance_name; | |
539 | int ret; | |
540 | ||
541 | ret = snprintf(buf, MAX_NAME_LEN, "%s", name); | |
542 | if (ret >= MAX_NAME_LEN) | |
543 | return ERR_PTR(-ENAMETOOLONG); | |
544 | ||
545 | func_name = buf; | |
546 | instance_name = strchr(func_name, '.'); | |
547 | if (!instance_name) { | |
548 | pr_err("Unable to locate . in FUNC.INSTANCE\n"); | |
549 | return ERR_PTR(-EINVAL); | |
550 | } | |
551 | *instance_name = '\0'; | |
552 | instance_name++; | |
553 | ||
554 | fi = usb_get_function_instance(func_name); | |
555 | if (IS_ERR(fi)) | |
a3469411 | 556 | return ERR_CAST(fi); |
88af8bbe | 557 | |
3958b792 | 558 | ret = config_item_set_name(&fi->group.cg_item, "%s", name); |
88af8bbe SAS |
559 | if (ret) { |
560 | usb_put_function_instance(fi); | |
561 | return ERR_PTR(ret); | |
562 | } | |
1933861d AP |
563 | if (fi->set_inst_name) { |
564 | ret = fi->set_inst_name(fi, instance_name); | |
565 | if (ret) { | |
566 | usb_put_function_instance(fi); | |
567 | return ERR_PTR(ret); | |
568 | } | |
569 | } | |
88af8bbe SAS |
570 | |
571 | gi = container_of(group, struct gadget_info, functions_group); | |
572 | ||
573 | mutex_lock(&gi->lock); | |
574 | list_add_tail(&fi->cfs_list, &gi->available_func); | |
575 | mutex_unlock(&gi->lock); | |
576 | return &fi->group; | |
577 | } | |
578 | ||
579 | static void function_drop( | |
580 | struct config_group *group, | |
581 | struct config_item *item) | |
582 | { | |
583 | struct usb_function_instance *fi = to_usb_function_instance(item); | |
584 | struct gadget_info *gi; | |
585 | ||
586 | gi = container_of(group, struct gadget_info, functions_group); | |
587 | ||
588 | mutex_lock(&gi->lock); | |
589 | list_del(&fi->cfs_list); | |
590 | mutex_unlock(&gi->lock); | |
591 | config_item_put(item); | |
592 | } | |
593 | ||
594 | static struct configfs_group_operations functions_ops = { | |
595 | .make_group = &function_make, | |
596 | .drop_item = &function_drop, | |
597 | }; | |
598 | ||
4ad01412 | 599 | static const struct config_item_type functions_type = { |
88af8bbe SAS |
600 | .ct_group_ops = &functions_ops, |
601 | .ct_owner = THIS_MODULE, | |
602 | }; | |
603 | ||
88af8bbe SAS |
604 | GS_STRINGS_RW(gadget_config_name, configuration); |
605 | ||
606 | static struct configfs_attribute *gadget_config_name_langid_attrs[] = { | |
45b6a73f | 607 | &gadget_config_name_attr_configuration, |
88af8bbe SAS |
608 | NULL, |
609 | }; | |
610 | ||
611 | static void gadget_config_name_attr_release(struct config_item *item) | |
612 | { | |
613 | struct gadget_config_name *cn = to_gadget_config_name(item); | |
614 | ||
615 | kfree(cn->configuration); | |
616 | ||
617 | list_del(&cn->list); | |
618 | kfree(cn); | |
619 | } | |
620 | ||
621 | USB_CONFIG_STRING_RW_OPS(gadget_config_name); | |
622 | USB_CONFIG_STRINGS_LANG(gadget_config_name, config_usb_cfg); | |
623 | ||
624 | static struct config_group *config_desc_make( | |
625 | struct config_group *group, | |
626 | const char *name) | |
627 | { | |
628 | struct gadget_info *gi; | |
629 | struct config_usb_cfg *cfg; | |
630 | char buf[MAX_NAME_LEN]; | |
631 | char *num_str; | |
632 | u8 num; | |
633 | int ret; | |
634 | ||
635 | gi = container_of(group, struct gadget_info, configs_group); | |
636 | ret = snprintf(buf, MAX_NAME_LEN, "%s", name); | |
637 | if (ret >= MAX_NAME_LEN) | |
638 | return ERR_PTR(-ENAMETOOLONG); | |
639 | ||
640 | num_str = strchr(buf, '.'); | |
641 | if (!num_str) { | |
642 | pr_err("Unable to locate . in name.bConfigurationValue\n"); | |
643 | return ERR_PTR(-EINVAL); | |
644 | } | |
645 | ||
646 | *num_str = '\0'; | |
647 | num_str++; | |
648 | ||
649 | if (!strlen(buf)) | |
650 | return ERR_PTR(-EINVAL); | |
651 | ||
652 | ret = kstrtou8(num_str, 0, &num); | |
653 | if (ret) | |
654 | return ERR_PTR(ret); | |
655 | ||
656 | cfg = kzalloc(sizeof(*cfg), GFP_KERNEL); | |
657 | if (!cfg) | |
658 | return ERR_PTR(-ENOMEM); | |
659 | cfg->c.label = kstrdup(buf, GFP_KERNEL); | |
660 | if (!cfg->c.label) { | |
661 | ret = -ENOMEM; | |
662 | goto err; | |
663 | } | |
664 | cfg->c.bConfigurationValue = num; | |
665 | cfg->c.MaxPower = CONFIG_USB_GADGET_VBUS_DRAW; | |
666 | cfg->c.bmAttributes = USB_CONFIG_ATT_ONE; | |
667 | INIT_LIST_HEAD(&cfg->string_list); | |
668 | INIT_LIST_HEAD(&cfg->func_list); | |
669 | ||
88af8bbe SAS |
670 | config_group_init_type_name(&cfg->group, name, |
671 | &gadget_config_type); | |
1ae1602d | 672 | |
88af8bbe SAS |
673 | config_group_init_type_name(&cfg->strings_group, "strings", |
674 | &gadget_config_name_strings_type); | |
1ae1602d | 675 | configfs_add_default_group(&cfg->strings_group, &cfg->group); |
88af8bbe SAS |
676 | |
677 | ret = usb_add_config_only(&gi->cdev, &cfg->c); | |
678 | if (ret) | |
679 | goto err; | |
680 | ||
681 | return &cfg->group; | |
682 | err: | |
683 | kfree(cfg->c.label); | |
684 | kfree(cfg); | |
685 | return ERR_PTR(ret); | |
686 | } | |
687 | ||
688 | static void config_desc_drop( | |
689 | struct config_group *group, | |
690 | struct config_item *item) | |
691 | { | |
692 | config_item_put(item); | |
693 | } | |
694 | ||
695 | static struct configfs_group_operations config_desc_ops = { | |
696 | .make_group = &config_desc_make, | |
697 | .drop_item = &config_desc_drop, | |
698 | }; | |
699 | ||
4ad01412 | 700 | static const struct config_item_type config_desc_type = { |
88af8bbe SAS |
701 | .ct_group_ops = &config_desc_ops, |
702 | .ct_owner = THIS_MODULE, | |
703 | }; | |
704 | ||
88af8bbe SAS |
705 | GS_STRINGS_RW(gadget_strings, manufacturer); |
706 | GS_STRINGS_RW(gadget_strings, product); | |
707 | GS_STRINGS_RW(gadget_strings, serialnumber); | |
708 | ||
709 | static struct configfs_attribute *gadget_strings_langid_attrs[] = { | |
45b6a73f CH |
710 | &gadget_strings_attr_manufacturer, |
711 | &gadget_strings_attr_product, | |
712 | &gadget_strings_attr_serialnumber, | |
88af8bbe SAS |
713 | NULL, |
714 | }; | |
715 | ||
716 | static void gadget_strings_attr_release(struct config_item *item) | |
717 | { | |
718 | struct gadget_strings *gs = to_gadget_strings(item); | |
719 | ||
720 | kfree(gs->manufacturer); | |
721 | kfree(gs->product); | |
722 | kfree(gs->serialnumber); | |
723 | ||
724 | list_del(&gs->list); | |
725 | kfree(gs); | |
726 | } | |
727 | ||
728 | USB_CONFIG_STRING_RW_OPS(gadget_strings); | |
729 | USB_CONFIG_STRINGS_LANG(gadget_strings, gadget_info); | |
730 | ||
87213d38 AP |
731 | static inline struct os_desc *to_os_desc(struct config_item *item) |
732 | { | |
733 | return container_of(to_config_group(item), struct os_desc, group); | |
734 | } | |
735 | ||
45b6a73f CH |
736 | static inline struct gadget_info *os_desc_item_to_gadget_info( |
737 | struct config_item *item) | |
87213d38 | 738 | { |
45b6a73f CH |
739 | return to_gadget_info(to_os_desc(item)->group.cg_item.ci_parent); |
740 | } | |
87213d38 | 741 | |
45b6a73f CH |
742 | static ssize_t os_desc_use_show(struct config_item *item, char *page) |
743 | { | |
e800e8cb | 744 | return sprintf(page, "%d\n", |
45b6a73f | 745 | os_desc_item_to_gadget_info(item)->use_os_desc); |
87213d38 AP |
746 | } |
747 | ||
45b6a73f | 748 | static ssize_t os_desc_use_store(struct config_item *item, const char *page, |
87213d38 AP |
749 | size_t len) |
750 | { | |
45b6a73f | 751 | struct gadget_info *gi = os_desc_item_to_gadget_info(item); |
87213d38 AP |
752 | int ret; |
753 | bool use; | |
754 | ||
87213d38 AP |
755 | mutex_lock(&gi->lock); |
756 | ret = strtobool(page, &use); | |
757 | if (!ret) { | |
758 | gi->use_os_desc = use; | |
759 | ret = len; | |
760 | } | |
761 | mutex_unlock(&gi->lock); | |
762 | ||
763 | return ret; | |
764 | } | |
765 | ||
45b6a73f | 766 | static ssize_t os_desc_b_vendor_code_show(struct config_item *item, char *page) |
87213d38 | 767 | { |
e800e8cb | 768 | return sprintf(page, "0x%02x\n", |
45b6a73f | 769 | os_desc_item_to_gadget_info(item)->b_vendor_code); |
87213d38 AP |
770 | } |
771 | ||
45b6a73f | 772 | static ssize_t os_desc_b_vendor_code_store(struct config_item *item, |
87213d38 AP |
773 | const char *page, size_t len) |
774 | { | |
45b6a73f | 775 | struct gadget_info *gi = os_desc_item_to_gadget_info(item); |
87213d38 AP |
776 | int ret; |
777 | u8 b_vendor_code; | |
778 | ||
87213d38 AP |
779 | mutex_lock(&gi->lock); |
780 | ret = kstrtou8(page, 0, &b_vendor_code); | |
781 | if (!ret) { | |
782 | gi->b_vendor_code = b_vendor_code; | |
783 | ret = len; | |
784 | } | |
785 | mutex_unlock(&gi->lock); | |
786 | ||
787 | return ret; | |
788 | } | |
789 | ||
45b6a73f | 790 | static ssize_t os_desc_qw_sign_show(struct config_item *item, char *page) |
87213d38 | 791 | { |
45b6a73f | 792 | struct gadget_info *gi = os_desc_item_to_gadget_info(item); |
76180d71 | 793 | int res; |
87213d38 | 794 | |
76180d71 SA |
795 | res = utf16s_to_utf8s((wchar_t *) gi->qw_sign, OS_STRING_QW_SIGN_LEN, |
796 | UTF16_LITTLE_ENDIAN, page, PAGE_SIZE - 1); | |
797 | page[res++] = '\n'; | |
798 | ||
799 | return res; | |
87213d38 AP |
800 | } |
801 | ||
45b6a73f | 802 | static ssize_t os_desc_qw_sign_store(struct config_item *item, const char *page, |
87213d38 AP |
803 | size_t len) |
804 | { | |
45b6a73f | 805 | struct gadget_info *gi = os_desc_item_to_gadget_info(item); |
87213d38 AP |
806 | int res, l; |
807 | ||
87213d38 AP |
808 | l = min((int)len, OS_STRING_QW_SIGN_LEN >> 1); |
809 | if (page[l - 1] == '\n') | |
810 | --l; | |
811 | ||
812 | mutex_lock(&gi->lock); | |
813 | res = utf8s_to_utf16s(page, l, | |
814 | UTF16_LITTLE_ENDIAN, (wchar_t *) gi->qw_sign, | |
815 | OS_STRING_QW_SIGN_LEN); | |
816 | if (res > 0) | |
817 | res = len; | |
818 | mutex_unlock(&gi->lock); | |
819 | ||
820 | return res; | |
821 | } | |
822 | ||
45b6a73f CH |
823 | CONFIGFS_ATTR(os_desc_, use); |
824 | CONFIGFS_ATTR(os_desc_, b_vendor_code); | |
825 | CONFIGFS_ATTR(os_desc_, qw_sign); | |
87213d38 AP |
826 | |
827 | static struct configfs_attribute *os_desc_attrs[] = { | |
45b6a73f CH |
828 | &os_desc_attr_use, |
829 | &os_desc_attr_b_vendor_code, | |
830 | &os_desc_attr_qw_sign, | |
87213d38 AP |
831 | NULL, |
832 | }; | |
833 | ||
834 | static void os_desc_attr_release(struct config_item *item) | |
835 | { | |
836 | struct os_desc *os_desc = to_os_desc(item); | |
837 | kfree(os_desc); | |
838 | } | |
839 | ||
da424314 AP |
840 | static int os_desc_link(struct config_item *os_desc_ci, |
841 | struct config_item *usb_cfg_ci) | |
842 | { | |
843 | struct gadget_info *gi = container_of(to_config_group(os_desc_ci), | |
844 | struct gadget_info, os_desc_group); | |
845 | struct usb_composite_dev *cdev = &gi->cdev; | |
846 | struct config_usb_cfg *c_target = | |
847 | container_of(to_config_group(usb_cfg_ci), | |
848 | struct config_usb_cfg, group); | |
849 | struct usb_configuration *c; | |
850 | int ret; | |
851 | ||
852 | mutex_lock(&gi->lock); | |
853 | list_for_each_entry(c, &cdev->configs, list) { | |
854 | if (c == &c_target->c) | |
855 | break; | |
856 | } | |
857 | if (c != &c_target->c) { | |
858 | ret = -EINVAL; | |
859 | goto out; | |
860 | } | |
861 | ||
862 | if (cdev->os_desc_config) { | |
863 | ret = -EBUSY; | |
864 | goto out; | |
865 | } | |
866 | ||
867 | cdev->os_desc_config = &c_target->c; | |
868 | ret = 0; | |
869 | ||
870 | out: | |
871 | mutex_unlock(&gi->lock); | |
872 | return ret; | |
873 | } | |
874 | ||
e16769d4 | 875 | static void os_desc_unlink(struct config_item *os_desc_ci, |
da424314 AP |
876 | struct config_item *usb_cfg_ci) |
877 | { | |
878 | struct gadget_info *gi = container_of(to_config_group(os_desc_ci), | |
879 | struct gadget_info, os_desc_group); | |
880 | struct usb_composite_dev *cdev = &gi->cdev; | |
881 | ||
882 | mutex_lock(&gi->lock); | |
afdaadc3 | 883 | if (gi->composite.gadget_driver.udc_name) |
da424314 AP |
884 | unregister_gadget(gi); |
885 | cdev->os_desc_config = NULL; | |
afdaadc3 | 886 | WARN_ON(gi->composite.gadget_driver.udc_name); |
da424314 | 887 | mutex_unlock(&gi->lock); |
da424314 AP |
888 | } |
889 | ||
87213d38 AP |
890 | static struct configfs_item_operations os_desc_ops = { |
891 | .release = os_desc_attr_release, | |
da424314 AP |
892 | .allow_link = os_desc_link, |
893 | .drop_link = os_desc_unlink, | |
87213d38 AP |
894 | }; |
895 | ||
896 | static struct config_item_type os_desc_type = { | |
897 | .ct_item_ops = &os_desc_ops, | |
898 | .ct_attrs = os_desc_attrs, | |
899 | .ct_owner = THIS_MODULE, | |
900 | }; | |
901 | ||
7419485f AP |
902 | static inline struct usb_os_desc_ext_prop |
903 | *to_usb_os_desc_ext_prop(struct config_item *item) | |
904 | { | |
905 | return container_of(item, struct usb_os_desc_ext_prop, item); | |
906 | } | |
907 | ||
45b6a73f | 908 | static ssize_t ext_prop_type_show(struct config_item *item, char *page) |
7419485f | 909 | { |
e800e8cb | 910 | return sprintf(page, "%d\n", to_usb_os_desc_ext_prop(item)->type); |
7419485f AP |
911 | } |
912 | ||
45b6a73f | 913 | static ssize_t ext_prop_type_store(struct config_item *item, |
7419485f AP |
914 | const char *page, size_t len) |
915 | { | |
45b6a73f | 916 | struct usb_os_desc_ext_prop *ext_prop = to_usb_os_desc_ext_prop(item); |
7419485f AP |
917 | struct usb_os_desc *desc = to_usb_os_desc(ext_prop->item.ci_parent); |
918 | u8 type; | |
919 | int ret; | |
920 | ||
921 | if (desc->opts_mutex) | |
922 | mutex_lock(desc->opts_mutex); | |
923 | ret = kstrtou8(page, 0, &type); | |
924 | if (ret) | |
925 | goto end; | |
926 | if (type < USB_EXT_PROP_UNICODE || type > USB_EXT_PROP_UNICODE_MULTI) { | |
927 | ret = -EINVAL; | |
928 | goto end; | |
929 | } | |
930 | ||
931 | if ((ext_prop->type == USB_EXT_PROP_BINARY || | |
932 | ext_prop->type == USB_EXT_PROP_LE32 || | |
933 | ext_prop->type == USB_EXT_PROP_BE32) && | |
934 | (type == USB_EXT_PROP_UNICODE || | |
935 | type == USB_EXT_PROP_UNICODE_ENV || | |
936 | type == USB_EXT_PROP_UNICODE_LINK)) | |
937 | ext_prop->data_len <<= 1; | |
938 | else if ((ext_prop->type == USB_EXT_PROP_UNICODE || | |
939 | ext_prop->type == USB_EXT_PROP_UNICODE_ENV || | |
940 | ext_prop->type == USB_EXT_PROP_UNICODE_LINK) && | |
941 | (type == USB_EXT_PROP_BINARY || | |
942 | type == USB_EXT_PROP_LE32 || | |
943 | type == USB_EXT_PROP_BE32)) | |
944 | ext_prop->data_len >>= 1; | |
945 | ext_prop->type = type; | |
946 | ret = len; | |
947 | ||
948 | end: | |
949 | if (desc->opts_mutex) | |
950 | mutex_unlock(desc->opts_mutex); | |
951 | return ret; | |
952 | } | |
953 | ||
45b6a73f | 954 | static ssize_t ext_prop_data_show(struct config_item *item, char *page) |
7419485f | 955 | { |
45b6a73f | 956 | struct usb_os_desc_ext_prop *ext_prop = to_usb_os_desc_ext_prop(item); |
7419485f AP |
957 | int len = ext_prop->data_len; |
958 | ||
959 | if (ext_prop->type == USB_EXT_PROP_UNICODE || | |
960 | ext_prop->type == USB_EXT_PROP_UNICODE_ENV || | |
961 | ext_prop->type == USB_EXT_PROP_UNICODE_LINK) | |
962 | len >>= 1; | |
963 | memcpy(page, ext_prop->data, len); | |
964 | ||
965 | return len; | |
966 | } | |
967 | ||
45b6a73f | 968 | static ssize_t ext_prop_data_store(struct config_item *item, |
7419485f AP |
969 | const char *page, size_t len) |
970 | { | |
45b6a73f | 971 | struct usb_os_desc_ext_prop *ext_prop = to_usb_os_desc_ext_prop(item); |
7419485f AP |
972 | struct usb_os_desc *desc = to_usb_os_desc(ext_prop->item.ci_parent); |
973 | char *new_data; | |
974 | size_t ret_len = len; | |
975 | ||
976 | if (page[len - 1] == '\n' || page[len - 1] == '\0') | |
977 | --len; | |
58b949e0 | 978 | new_data = kmemdup(page, len, GFP_KERNEL); |
7419485f AP |
979 | if (!new_data) |
980 | return -ENOMEM; | |
981 | ||
7419485f AP |
982 | if (desc->opts_mutex) |
983 | mutex_lock(desc->opts_mutex); | |
984 | kfree(ext_prop->data); | |
985 | ext_prop->data = new_data; | |
986 | desc->ext_prop_len -= ext_prop->data_len; | |
987 | ext_prop->data_len = len; | |
988 | desc->ext_prop_len += ext_prop->data_len; | |
989 | if (ext_prop->type == USB_EXT_PROP_UNICODE || | |
990 | ext_prop->type == USB_EXT_PROP_UNICODE_ENV || | |
991 | ext_prop->type == USB_EXT_PROP_UNICODE_LINK) { | |
992 | desc->ext_prop_len -= ext_prop->data_len; | |
993 | ext_prop->data_len <<= 1; | |
994 | ext_prop->data_len += 2; | |
995 | desc->ext_prop_len += ext_prop->data_len; | |
996 | } | |
997 | if (desc->opts_mutex) | |
998 | mutex_unlock(desc->opts_mutex); | |
999 | return ret_len; | |
1000 | } | |
1001 | ||
45b6a73f CH |
1002 | CONFIGFS_ATTR(ext_prop_, type); |
1003 | CONFIGFS_ATTR(ext_prop_, data); | |
7419485f AP |
1004 | |
1005 | static struct configfs_attribute *ext_prop_attrs[] = { | |
45b6a73f CH |
1006 | &ext_prop_attr_type, |
1007 | &ext_prop_attr_data, | |
7419485f AP |
1008 | NULL, |
1009 | }; | |
1010 | ||
1011 | static void usb_os_desc_ext_prop_release(struct config_item *item) | |
1012 | { | |
1013 | struct usb_os_desc_ext_prop *ext_prop = to_usb_os_desc_ext_prop(item); | |
1014 | ||
1015 | kfree(ext_prop); /* frees a whole chunk */ | |
1016 | } | |
1017 | ||
1018 | static struct configfs_item_operations ext_prop_ops = { | |
1019 | .release = usb_os_desc_ext_prop_release, | |
7419485f AP |
1020 | }; |
1021 | ||
1022 | static struct config_item *ext_prop_make( | |
1023 | struct config_group *group, | |
1024 | const char *name) | |
1025 | { | |
1026 | struct usb_os_desc_ext_prop *ext_prop; | |
1027 | struct config_item_type *ext_prop_type; | |
1028 | struct usb_os_desc *desc; | |
1029 | char *vlabuf; | |
1030 | ||
1031 | vla_group(data_chunk); | |
1032 | vla_item(data_chunk, struct usb_os_desc_ext_prop, ext_prop, 1); | |
1033 | vla_item(data_chunk, struct config_item_type, ext_prop_type, 1); | |
1034 | ||
1035 | vlabuf = kzalloc(vla_group_size(data_chunk), GFP_KERNEL); | |
1036 | if (!vlabuf) | |
1037 | return ERR_PTR(-ENOMEM); | |
1038 | ||
1039 | ext_prop = vla_ptr(vlabuf, data_chunk, ext_prop); | |
1040 | ext_prop_type = vla_ptr(vlabuf, data_chunk, ext_prop_type); | |
1041 | ||
1042 | desc = container_of(group, struct usb_os_desc, group); | |
1043 | ext_prop_type->ct_item_ops = &ext_prop_ops; | |
1044 | ext_prop_type->ct_attrs = ext_prop_attrs; | |
1045 | ext_prop_type->ct_owner = desc->owner; | |
1046 | ||
1047 | config_item_init_type_name(&ext_prop->item, name, ext_prop_type); | |
1048 | ||
1049 | ext_prop->name = kstrdup(name, GFP_KERNEL); | |
1050 | if (!ext_prop->name) { | |
1051 | kfree(vlabuf); | |
1052 | return ERR_PTR(-ENOMEM); | |
1053 | } | |
1054 | desc->ext_prop_len += 14; | |
1055 | ext_prop->name_len = 2 * strlen(ext_prop->name) + 2; | |
1056 | if (desc->opts_mutex) | |
1057 | mutex_lock(desc->opts_mutex); | |
1058 | desc->ext_prop_len += ext_prop->name_len; | |
1059 | list_add_tail(&ext_prop->entry, &desc->ext_prop); | |
1060 | ++desc->ext_prop_count; | |
1061 | if (desc->opts_mutex) | |
1062 | mutex_unlock(desc->opts_mutex); | |
1063 | ||
1064 | return &ext_prop->item; | |
1065 | } | |
1066 | ||
1067 | static void ext_prop_drop(struct config_group *group, struct config_item *item) | |
1068 | { | |
1069 | struct usb_os_desc_ext_prop *ext_prop = to_usb_os_desc_ext_prop(item); | |
1070 | struct usb_os_desc *desc = to_usb_os_desc(&group->cg_item); | |
1071 | ||
1072 | if (desc->opts_mutex) | |
1073 | mutex_lock(desc->opts_mutex); | |
1074 | list_del(&ext_prop->entry); | |
1075 | --desc->ext_prop_count; | |
1076 | kfree(ext_prop->name); | |
1077 | desc->ext_prop_len -= (ext_prop->name_len + ext_prop->data_len + 14); | |
1078 | if (desc->opts_mutex) | |
1079 | mutex_unlock(desc->opts_mutex); | |
1080 | config_item_put(item); | |
1081 | } | |
1082 | ||
1083 | static struct configfs_group_operations interf_grp_ops = { | |
1084 | .make_item = &ext_prop_make, | |
1085 | .drop_item = &ext_prop_drop, | |
1086 | }; | |
1087 | ||
45b6a73f | 1088 | static ssize_t interf_grp_compatible_id_show(struct config_item *item, |
fe00b138 | 1089 | char *page) |
da424314 | 1090 | { |
45b6a73f | 1091 | memcpy(page, to_usb_os_desc(item)->ext_compat_id, 8); |
da424314 AP |
1092 | return 8; |
1093 | } | |
1094 | ||
45b6a73f | 1095 | static ssize_t interf_grp_compatible_id_store(struct config_item *item, |
fe00b138 | 1096 | const char *page, size_t len) |
da424314 | 1097 | { |
45b6a73f | 1098 | struct usb_os_desc *desc = to_usb_os_desc(item); |
da424314 AP |
1099 | int l; |
1100 | ||
1101 | l = min_t(int, 8, len); | |
1102 | if (page[l - 1] == '\n') | |
1103 | --l; | |
1104 | if (desc->opts_mutex) | |
1105 | mutex_lock(desc->opts_mutex); | |
1106 | memcpy(desc->ext_compat_id, page, l); | |
da424314 AP |
1107 | |
1108 | if (desc->opts_mutex) | |
1109 | mutex_unlock(desc->opts_mutex); | |
1110 | ||
1111 | return len; | |
1112 | } | |
1113 | ||
45b6a73f | 1114 | static ssize_t interf_grp_sub_compatible_id_show(struct config_item *item, |
fe00b138 | 1115 | char *page) |
da424314 | 1116 | { |
45b6a73f | 1117 | memcpy(page, to_usb_os_desc(item)->ext_compat_id + 8, 8); |
da424314 AP |
1118 | return 8; |
1119 | } | |
1120 | ||
45b6a73f | 1121 | static ssize_t interf_grp_sub_compatible_id_store(struct config_item *item, |
fe00b138 | 1122 | const char *page, size_t len) |
da424314 | 1123 | { |
45b6a73f | 1124 | struct usb_os_desc *desc = to_usb_os_desc(item); |
da424314 AP |
1125 | int l; |
1126 | ||
1127 | l = min_t(int, 8, len); | |
1128 | if (page[l - 1] == '\n') | |
1129 | --l; | |
1130 | if (desc->opts_mutex) | |
1131 | mutex_lock(desc->opts_mutex); | |
1132 | memcpy(desc->ext_compat_id + 8, page, l); | |
da424314 AP |
1133 | |
1134 | if (desc->opts_mutex) | |
1135 | mutex_unlock(desc->opts_mutex); | |
1136 | ||
1137 | return len; | |
1138 | } | |
1139 | ||
45b6a73f CH |
1140 | CONFIGFS_ATTR(interf_grp_, compatible_id); |
1141 | CONFIGFS_ATTR(interf_grp_, sub_compatible_id); | |
da424314 AP |
1142 | |
1143 | static struct configfs_attribute *interf_grp_attrs[] = { | |
45b6a73f CH |
1144 | &interf_grp_attr_compatible_id, |
1145 | &interf_grp_attr_sub_compatible_id, | |
da424314 AP |
1146 | NULL |
1147 | }; | |
1148 | ||
ff74745e AG |
1149 | struct config_group *usb_os_desc_prepare_interf_dir( |
1150 | struct config_group *parent, | |
1151 | int n_interf, | |
1152 | struct usb_os_desc **desc, | |
1153 | char **names, | |
1154 | struct module *owner) | |
da424314 | 1155 | { |
1ae1602d | 1156 | struct config_group *os_desc_group; |
da424314 AP |
1157 | struct config_item_type *os_desc_type, *interface_type; |
1158 | ||
1159 | vla_group(data_chunk); | |
da424314 | 1160 | vla_item(data_chunk, struct config_group, os_desc_group, 1); |
da424314 AP |
1161 | vla_item(data_chunk, struct config_item_type, os_desc_type, 1); |
1162 | vla_item(data_chunk, struct config_item_type, interface_type, 1); | |
1163 | ||
1164 | char *vlabuf = kzalloc(vla_group_size(data_chunk), GFP_KERNEL); | |
1165 | if (!vlabuf) | |
ff74745e | 1166 | return ERR_PTR(-ENOMEM); |
da424314 | 1167 | |
da424314 AP |
1168 | os_desc_group = vla_ptr(vlabuf, data_chunk, os_desc_group); |
1169 | os_desc_type = vla_ptr(vlabuf, data_chunk, os_desc_type); | |
da424314 AP |
1170 | interface_type = vla_ptr(vlabuf, data_chunk, interface_type); |
1171 | ||
da424314 AP |
1172 | os_desc_type->ct_owner = owner; |
1173 | config_group_init_type_name(os_desc_group, "os_desc", os_desc_type); | |
1ae1602d | 1174 | configfs_add_default_group(os_desc_group, parent); |
da424314 | 1175 | |
7419485f | 1176 | interface_type->ct_group_ops = &interf_grp_ops; |
da424314 AP |
1177 | interface_type->ct_attrs = interf_grp_attrs; |
1178 | interface_type->ct_owner = owner; | |
1179 | ||
1180 | while (n_interf--) { | |
1181 | struct usb_os_desc *d; | |
1182 | ||
1183 | d = desc[n_interf]; | |
7419485f | 1184 | d->owner = owner; |
da424314 | 1185 | config_group_init_type_name(&d->group, "", interface_type); |
14574b54 AP |
1186 | config_item_set_name(&d->group.cg_item, "interface.%s", |
1187 | names[n_interf]); | |
1ae1602d | 1188 | configfs_add_default_group(&d->group, os_desc_group); |
da424314 AP |
1189 | } |
1190 | ||
ff74745e | 1191 | return os_desc_group; |
da424314 AP |
1192 | } |
1193 | EXPORT_SYMBOL(usb_os_desc_prepare_interf_dir); | |
1194 | ||
88af8bbe SAS |
1195 | static int configfs_do_nothing(struct usb_composite_dev *cdev) |
1196 | { | |
75bfe23a | 1197 | WARN_ON(1); |
88af8bbe SAS |
1198 | return -EINVAL; |
1199 | } | |
1200 | ||
1201 | int composite_dev_prepare(struct usb_composite_driver *composite, | |
1202 | struct usb_composite_dev *dev); | |
1203 | ||
da424314 AP |
1204 | int composite_os_desc_req_prepare(struct usb_composite_dev *cdev, |
1205 | struct usb_ep *ep0); | |
1206 | ||
88af8bbe SAS |
1207 | static void purge_configs_funcs(struct gadget_info *gi) |
1208 | { | |
1209 | struct usb_configuration *c; | |
1210 | ||
1211 | list_for_each_entry(c, &gi->cdev.configs, list) { | |
1212 | struct usb_function *f, *tmp; | |
1213 | struct config_usb_cfg *cfg; | |
1214 | ||
1215 | cfg = container_of(c, struct config_usb_cfg, c); | |
1216 | ||
1217 | list_for_each_entry_safe(f, tmp, &c->functions, list) { | |
1218 | ||
1219 | list_move_tail(&f->list, &cfg->func_list); | |
1220 | if (f->unbind) { | |
da7b895d | 1221 | dev_dbg(&gi->cdev.gadget->dev, |
ad22a666 PS |
1222 | "unbind function '%s'/%p\n", |
1223 | f->name, f); | |
88af8bbe SAS |
1224 | f->unbind(c, f); |
1225 | } | |
1226 | } | |
1227 | c->next_interface_id = 0; | |
903124fe | 1228 | memset(c->interface, 0, sizeof(c->interface)); |
554eead5 | 1229 | c->superspeed_plus = 0; |
88af8bbe SAS |
1230 | c->superspeed = 0; |
1231 | c->highspeed = 0; | |
1232 | c->fullspeed = 0; | |
1233 | } | |
1234 | } | |
1235 | ||
1236 | static int configfs_composite_bind(struct usb_gadget *gadget, | |
1237 | struct usb_gadget_driver *gdriver) | |
1238 | { | |
1239 | struct usb_composite_driver *composite = to_cdriver(gdriver); | |
1240 | struct gadget_info *gi = container_of(composite, | |
1241 | struct gadget_info, composite); | |
1242 | struct usb_composite_dev *cdev = &gi->cdev; | |
1243 | struct usb_configuration *c; | |
1244 | struct usb_string *s; | |
1245 | unsigned i; | |
1246 | int ret; | |
1247 | ||
1248 | /* the gi->lock is hold by the caller */ | |
1a1c851b | 1249 | gi->unbind = 0; |
88af8bbe SAS |
1250 | cdev->gadget = gadget; |
1251 | set_gadget_data(gadget, cdev); | |
1252 | ret = composite_dev_prepare(composite, cdev); | |
1253 | if (ret) | |
1254 | return ret; | |
1255 | /* and now the gadget bind */ | |
1256 | ret = -EINVAL; | |
1257 | ||
1258 | if (list_empty(&gi->cdev.configs)) { | |
4d9f872c | 1259 | pr_err("Need at least one configuration in %s.\n", |
88af8bbe SAS |
1260 | gi->composite.name); |
1261 | goto err_comp_cleanup; | |
1262 | } | |
1263 | ||
1264 | ||
1265 | list_for_each_entry(c, &gi->cdev.configs, list) { | |
1266 | struct config_usb_cfg *cfg; | |
1267 | ||
1268 | cfg = container_of(c, struct config_usb_cfg, c); | |
1269 | if (list_empty(&cfg->func_list)) { | |
4d9f872c | 1270 | pr_err("Config %s/%d of %s needs at least one function.\n", |
88af8bbe SAS |
1271 | c->label, c->bConfigurationValue, |
1272 | gi->composite.name); | |
1273 | goto err_comp_cleanup; | |
1274 | } | |
1275 | } | |
1276 | ||
1277 | /* init all strings */ | |
1278 | if (!list_empty(&gi->string_list)) { | |
1279 | struct gadget_strings *gs; | |
1280 | ||
1281 | i = 0; | |
1282 | list_for_each_entry(gs, &gi->string_list, list) { | |
1283 | ||
1284 | gi->gstrings[i] = &gs->stringtab_dev; | |
1285 | gs->stringtab_dev.strings = gs->strings; | |
1286 | gs->strings[USB_GADGET_MANUFACTURER_IDX].s = | |
1287 | gs->manufacturer; | |
1288 | gs->strings[USB_GADGET_PRODUCT_IDX].s = gs->product; | |
1289 | gs->strings[USB_GADGET_SERIAL_IDX].s = gs->serialnumber; | |
1290 | i++; | |
1291 | } | |
1292 | gi->gstrings[i] = NULL; | |
1293 | s = usb_gstrings_attach(&gi->cdev, gi->gstrings, | |
1294 | USB_GADGET_FIRST_AVAIL_IDX); | |
fea77077 WY |
1295 | if (IS_ERR(s)) { |
1296 | ret = PTR_ERR(s); | |
88af8bbe | 1297 | goto err_comp_cleanup; |
fea77077 | 1298 | } |
88af8bbe SAS |
1299 | |
1300 | gi->cdev.desc.iManufacturer = s[USB_GADGET_MANUFACTURER_IDX].id; | |
1301 | gi->cdev.desc.iProduct = s[USB_GADGET_PRODUCT_IDX].id; | |
1302 | gi->cdev.desc.iSerialNumber = s[USB_GADGET_SERIAL_IDX].id; | |
1303 | } | |
1304 | ||
87213d38 AP |
1305 | if (gi->use_os_desc) { |
1306 | cdev->use_os_string = true; | |
1307 | cdev->b_vendor_code = gi->b_vendor_code; | |
1308 | memcpy(cdev->qw_sign, gi->qw_sign, OS_STRING_QW_SIGN_LEN); | |
1309 | } | |
1310 | ||
41ce84c8 LJ |
1311 | if (gadget_is_otg(gadget) && !otg_desc[0]) { |
1312 | struct usb_descriptor_header *usb_desc; | |
1313 | ||
1314 | usb_desc = usb_otg_descriptor_alloc(gadget); | |
1315 | if (!usb_desc) { | |
1316 | ret = -ENOMEM; | |
1317 | goto err_comp_cleanup; | |
1318 | } | |
1319 | usb_otg_descriptor_init(gadget, usb_desc); | |
1320 | otg_desc[0] = usb_desc; | |
1321 | otg_desc[1] = NULL; | |
1322 | } | |
1323 | ||
88af8bbe SAS |
1324 | /* Go through all configs, attach all functions */ |
1325 | list_for_each_entry(c, &gi->cdev.configs, list) { | |
1326 | struct config_usb_cfg *cfg; | |
1327 | struct usb_function *f; | |
1328 | struct usb_function *tmp; | |
1329 | struct gadget_config_name *cn; | |
1330 | ||
41ce84c8 LJ |
1331 | if (gadget_is_otg(gadget)) |
1332 | c->descriptors = otg_desc; | |
1333 | ||
88af8bbe SAS |
1334 | cfg = container_of(c, struct config_usb_cfg, c); |
1335 | if (!list_empty(&cfg->string_list)) { | |
1336 | i = 0; | |
1337 | list_for_each_entry(cn, &cfg->string_list, list) { | |
1338 | cfg->gstrings[i] = &cn->stringtab_dev; | |
1339 | cn->stringtab_dev.strings = &cn->strings; | |
1340 | cn->strings.s = cn->configuration; | |
1341 | i++; | |
1342 | } | |
1343 | cfg->gstrings[i] = NULL; | |
1344 | s = usb_gstrings_attach(&gi->cdev, cfg->gstrings, 1); | |
fea77077 WY |
1345 | if (IS_ERR(s)) { |
1346 | ret = PTR_ERR(s); | |
88af8bbe | 1347 | goto err_comp_cleanup; |
fea77077 | 1348 | } |
88af8bbe SAS |
1349 | c->iConfiguration = s[0].id; |
1350 | } | |
1351 | ||
1352 | list_for_each_entry_safe(f, tmp, &cfg->func_list, list) { | |
1353 | list_del(&f->list); | |
1354 | ret = usb_add_function(c, f); | |
5a68e9b5 AP |
1355 | if (ret) { |
1356 | list_add(&f->list, &cfg->func_list); | |
88af8bbe | 1357 | goto err_purge_funcs; |
5a68e9b5 | 1358 | } |
88af8bbe SAS |
1359 | } |
1360 | usb_ep_autoconfig_reset(cdev->gadget); | |
1361 | } | |
da424314 AP |
1362 | if (cdev->use_os_string) { |
1363 | ret = composite_os_desc_req_prepare(cdev, gadget->ep0); | |
1364 | if (ret) | |
1365 | goto err_purge_funcs; | |
1366 | } | |
1367 | ||
88af8bbe SAS |
1368 | usb_ep_autoconfig_reset(cdev->gadget); |
1369 | return 0; | |
1370 | ||
1371 | err_purge_funcs: | |
1372 | purge_configs_funcs(gi); | |
1373 | err_comp_cleanup: | |
1374 | composite_dev_cleanup(cdev); | |
1375 | return ret; | |
1376 | } | |
1377 | ||
1378 | static void configfs_composite_unbind(struct usb_gadget *gadget) | |
1379 | { | |
1380 | struct usb_composite_dev *cdev; | |
1381 | struct gadget_info *gi; | |
1a1c851b | 1382 | unsigned long flags; |
88af8bbe SAS |
1383 | |
1384 | /* the gi->lock is hold by the caller */ | |
1385 | ||
1386 | cdev = get_gadget_data(gadget); | |
1387 | gi = container_of(cdev, struct gadget_info, cdev); | |
1a1c851b PC |
1388 | spin_lock_irqsave(&gi->spinlock, flags); |
1389 | gi->unbind = 1; | |
1390 | spin_unlock_irqrestore(&gi->spinlock, flags); | |
88af8bbe | 1391 | |
41ce84c8 LJ |
1392 | kfree(otg_desc[0]); |
1393 | otg_desc[0] = NULL; | |
88af8bbe SAS |
1394 | purge_configs_funcs(gi); |
1395 | composite_dev_cleanup(cdev); | |
1396 | usb_ep_autoconfig_reset(cdev->gadget); | |
1a1c851b | 1397 | spin_lock_irqsave(&gi->spinlock, flags); |
88af8bbe SAS |
1398 | cdev->gadget = NULL; |
1399 | set_gadget_data(gadget, NULL); | |
1a1c851b PC |
1400 | spin_unlock_irqrestore(&gi->spinlock, flags); |
1401 | } | |
1402 | ||
1403 | static int configfs_composite_setup(struct usb_gadget *gadget, | |
1404 | const struct usb_ctrlrequest *ctrl) | |
1405 | { | |
1406 | struct usb_composite_dev *cdev; | |
1407 | struct gadget_info *gi; | |
1408 | unsigned long flags; | |
1409 | int ret; | |
1410 | ||
1411 | cdev = get_gadget_data(gadget); | |
1412 | if (!cdev) | |
1413 | return 0; | |
1414 | ||
1415 | gi = container_of(cdev, struct gadget_info, cdev); | |
1416 | spin_lock_irqsave(&gi->spinlock, flags); | |
1417 | cdev = get_gadget_data(gadget); | |
1418 | if (!cdev || gi->unbind) { | |
1419 | spin_unlock_irqrestore(&gi->spinlock, flags); | |
1420 | return 0; | |
1421 | } | |
1422 | ||
1423 | ret = composite_setup(gadget, ctrl); | |
1424 | spin_unlock_irqrestore(&gi->spinlock, flags); | |
1425 | return ret; | |
1426 | } | |
1427 | ||
1428 | static void configfs_composite_disconnect(struct usb_gadget *gadget) | |
1429 | { | |
1430 | struct usb_composite_dev *cdev; | |
1431 | struct gadget_info *gi; | |
1432 | unsigned long flags; | |
1433 | ||
1434 | cdev = get_gadget_data(gadget); | |
1435 | if (!cdev) | |
1436 | return; | |
1437 | ||
1438 | gi = container_of(cdev, struct gadget_info, cdev); | |
1439 | spin_lock_irqsave(&gi->spinlock, flags); | |
1440 | cdev = get_gadget_data(gadget); | |
1441 | if (!cdev || gi->unbind) { | |
1442 | spin_unlock_irqrestore(&gi->spinlock, flags); | |
1443 | return; | |
1444 | } | |
1445 | ||
1446 | composite_disconnect(gadget); | |
1447 | spin_unlock_irqrestore(&gi->spinlock, flags); | |
1448 | } | |
1449 | ||
1450 | static void configfs_composite_suspend(struct usb_gadget *gadget) | |
1451 | { | |
1452 | struct usb_composite_dev *cdev; | |
1453 | struct gadget_info *gi; | |
1454 | unsigned long flags; | |
1455 | ||
1456 | cdev = get_gadget_data(gadget); | |
1457 | if (!cdev) | |
1458 | return; | |
1459 | ||
1460 | gi = container_of(cdev, struct gadget_info, cdev); | |
1461 | spin_lock_irqsave(&gi->spinlock, flags); | |
1462 | cdev = get_gadget_data(gadget); | |
1463 | if (!cdev || gi->unbind) { | |
1464 | spin_unlock_irqrestore(&gi->spinlock, flags); | |
1465 | return; | |
1466 | } | |
1467 | ||
1468 | composite_suspend(gadget); | |
1469 | spin_unlock_irqrestore(&gi->spinlock, flags); | |
1470 | } | |
1471 | ||
1472 | static void configfs_composite_resume(struct usb_gadget *gadget) | |
1473 | { | |
1474 | struct usb_composite_dev *cdev; | |
1475 | struct gadget_info *gi; | |
1476 | unsigned long flags; | |
1477 | ||
1478 | cdev = get_gadget_data(gadget); | |
1479 | if (!cdev) | |
1480 | return; | |
1481 | ||
1482 | gi = container_of(cdev, struct gadget_info, cdev); | |
1483 | spin_lock_irqsave(&gi->spinlock, flags); | |
1484 | cdev = get_gadget_data(gadget); | |
1485 | if (!cdev || gi->unbind) { | |
1486 | spin_unlock_irqrestore(&gi->spinlock, flags); | |
1487 | return; | |
1488 | } | |
1489 | ||
1490 | composite_resume(gadget); | |
1491 | spin_unlock_irqrestore(&gi->spinlock, flags); | |
88af8bbe SAS |
1492 | } |
1493 | ||
1494 | static const struct usb_gadget_driver configfs_driver_template = { | |
1495 | .bind = configfs_composite_bind, | |
1496 | .unbind = configfs_composite_unbind, | |
1497 | ||
1a1c851b PC |
1498 | .setup = configfs_composite_setup, |
1499 | .reset = configfs_composite_disconnect, | |
1500 | .disconnect = configfs_composite_disconnect, | |
88af8bbe | 1501 | |
1a1c851b PC |
1502 | .suspend = configfs_composite_suspend, |
1503 | .resume = configfs_composite_resume, | |
3a571870 | 1504 | |
88af8bbe SAS |
1505 | .max_speed = USB_SPEED_SUPER, |
1506 | .driver = { | |
1507 | .owner = THIS_MODULE, | |
1508 | .name = "configfs-gadget", | |
1509 | }, | |
f1bddbb3 | 1510 | .match_existing_only = 1, |
88af8bbe SAS |
1511 | }; |
1512 | ||
1513 | static struct config_group *gadgets_make( | |
1514 | struct config_group *group, | |
1515 | const char *name) | |
1516 | { | |
1517 | struct gadget_info *gi; | |
1518 | ||
1519 | gi = kzalloc(sizeof(*gi), GFP_KERNEL); | |
1520 | if (!gi) | |
1521 | return ERR_PTR(-ENOMEM); | |
1522 | ||
1ae1602d | 1523 | config_group_init_type_name(&gi->group, name, &gadget_root_type); |
88af8bbe SAS |
1524 | |
1525 | config_group_init_type_name(&gi->functions_group, "functions", | |
1526 | &functions_type); | |
1ae1602d CH |
1527 | configfs_add_default_group(&gi->functions_group, &gi->group); |
1528 | ||
88af8bbe SAS |
1529 | config_group_init_type_name(&gi->configs_group, "configs", |
1530 | &config_desc_type); | |
1ae1602d CH |
1531 | configfs_add_default_group(&gi->configs_group, &gi->group); |
1532 | ||
88af8bbe SAS |
1533 | config_group_init_type_name(&gi->strings_group, "strings", |
1534 | &gadget_strings_strings_type); | |
1ae1602d CH |
1535 | configfs_add_default_group(&gi->strings_group, &gi->group); |
1536 | ||
87213d38 AP |
1537 | config_group_init_type_name(&gi->os_desc_group, "os_desc", |
1538 | &os_desc_type); | |
1ae1602d | 1539 | configfs_add_default_group(&gi->os_desc_group, &gi->group); |
88af8bbe SAS |
1540 | |
1541 | gi->composite.bind = configfs_do_nothing; | |
1542 | gi->composite.unbind = configfs_do_nothing; | |
1543 | gi->composite.suspend = NULL; | |
1544 | gi->composite.resume = NULL; | |
1545 | gi->composite.max_speed = USB_SPEED_SUPER; | |
1546 | ||
093edc2b | 1547 | spin_lock_init(&gi->spinlock); |
88af8bbe SAS |
1548 | mutex_init(&gi->lock); |
1549 | INIT_LIST_HEAD(&gi->string_list); | |
1550 | INIT_LIST_HEAD(&gi->available_func); | |
1551 | ||
1552 | composite_init_dev(&gi->cdev); | |
1553 | gi->cdev.desc.bLength = USB_DT_DEVICE_SIZE; | |
1554 | gi->cdev.desc.bDescriptorType = USB_DT_DEVICE; | |
1555 | gi->cdev.desc.bcdDevice = cpu_to_le16(get_default_bcdDevice()); | |
1556 | ||
1557 | gi->composite.gadget_driver = configfs_driver_template; | |
1558 | ||
1559 | gi->composite.gadget_driver.function = kstrdup(name, GFP_KERNEL); | |
1560 | gi->composite.name = gi->composite.gadget_driver.function; | |
1561 | ||
1562 | if (!gi->composite.gadget_driver.function) | |
1563 | goto err; | |
1564 | ||
88af8bbe SAS |
1565 | return &gi->group; |
1566 | err: | |
1567 | kfree(gi); | |
1568 | return ERR_PTR(-ENOMEM); | |
1569 | } | |
1570 | ||
1571 | static void gadgets_drop(struct config_group *group, struct config_item *item) | |
1572 | { | |
1573 | config_item_put(item); | |
1574 | } | |
1575 | ||
1576 | static struct configfs_group_operations gadgets_ops = { | |
1577 | .make_group = &gadgets_make, | |
1578 | .drop_item = &gadgets_drop, | |
1579 | }; | |
1580 | ||
4ad01412 | 1581 | static const struct config_item_type gadgets_type = { |
88af8bbe SAS |
1582 | .ct_group_ops = &gadgets_ops, |
1583 | .ct_owner = THIS_MODULE, | |
1584 | }; | |
1585 | ||
1586 | static struct configfs_subsystem gadget_subsys = { | |
1587 | .su_group = { | |
1588 | .cg_item = { | |
1589 | .ci_namebuf = "usb_gadget", | |
1590 | .ci_type = &gadgets_type, | |
1591 | }, | |
1592 | }, | |
1593 | .su_mutex = __MUTEX_INITIALIZER(gadget_subsys.su_mutex), | |
1594 | }; | |
1595 | ||
092a4bd0 AP |
1596 | void unregister_gadget_item(struct config_item *item) |
1597 | { | |
1598 | struct gadget_info *gi = to_gadget_info(item); | |
1599 | ||
cee51c33 | 1600 | mutex_lock(&gi->lock); |
092a4bd0 | 1601 | unregister_gadget(gi); |
cee51c33 | 1602 | mutex_unlock(&gi->lock); |
092a4bd0 | 1603 | } |
0700faaf | 1604 | EXPORT_SYMBOL_GPL(unregister_gadget_item); |
092a4bd0 | 1605 | |
88af8bbe SAS |
1606 | static int __init gadget_cfs_init(void) |
1607 | { | |
1608 | int ret; | |
1609 | ||
1610 | config_group_init(&gadget_subsys.su_group); | |
1611 | ||
1612 | ret = configfs_register_subsystem(&gadget_subsys); | |
1613 | return ret; | |
1614 | } | |
1615 | module_init(gadget_cfs_init); | |
1616 | ||
1617 | static void __exit gadget_cfs_exit(void) | |
1618 | { | |
1619 | configfs_unregister_subsystem(&gadget_subsys); | |
1620 | } | |
1621 | module_exit(gadget_cfs_exit); |