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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 | ||
15753588 KK |
263 | if (strlen(page) < len) |
264 | return -EOVERFLOW; | |
265 | ||
88af8bbe SAS |
266 | name = kstrdup(page, GFP_KERNEL); |
267 | if (!name) | |
268 | return -ENOMEM; | |
269 | if (name[len - 1] == '\n') | |
270 | name[len - 1] = '\0'; | |
271 | ||
272 | mutex_lock(&gi->lock); | |
273 | ||
274 | if (!strlen(name)) { | |
275 | ret = unregister_gadget(gi); | |
276 | if (ret) | |
277 | goto err; | |
38355b2a | 278 | kfree(name); |
88af8bbe | 279 | } else { |
afdaadc3 | 280 | if (gi->composite.gadget_driver.udc_name) { |
88af8bbe SAS |
281 | ret = -EBUSY; |
282 | goto err; | |
283 | } | |
afdaadc3 RB |
284 | gi->composite.gadget_driver.udc_name = name; |
285 | ret = usb_gadget_probe_driver(&gi->composite.gadget_driver); | |
286 | if (ret) { | |
287 | gi->composite.gadget_driver.udc_name = NULL; | |
88af8bbe | 288 | goto err; |
afdaadc3 | 289 | } |
88af8bbe SAS |
290 | } |
291 | mutex_unlock(&gi->lock); | |
292 | return len; | |
293 | err: | |
294 | kfree(name); | |
295 | mutex_unlock(&gi->lock); | |
296 | return ret; | |
297 | } | |
298 | ||
a0249703 TN |
299 | static ssize_t gadget_dev_desc_max_speed_show(struct config_item *item, |
300 | char *page) | |
301 | { | |
302 | enum usb_device_speed speed = to_gadget_info(item)->composite.max_speed; | |
303 | ||
304 | return sprintf(page, "%s\n", usb_speed_string(speed)); | |
305 | } | |
306 | ||
307 | static ssize_t gadget_dev_desc_max_speed_store(struct config_item *item, | |
308 | const char *page, size_t len) | |
309 | { | |
310 | struct gadget_info *gi = to_gadget_info(item); | |
311 | ||
312 | mutex_lock(&gi->lock); | |
313 | ||
314 | /* Prevent changing of max_speed after the driver is binded */ | |
315 | if (gi->composite.gadget_driver.udc_name) | |
316 | goto err; | |
317 | ||
318 | if (strncmp(page, "super-speed-plus", 16) == 0) | |
319 | gi->composite.max_speed = USB_SPEED_SUPER_PLUS; | |
320 | else if (strncmp(page, "super-speed", 11) == 0) | |
321 | gi->composite.max_speed = USB_SPEED_SUPER; | |
322 | else if (strncmp(page, "high-speed", 10) == 0) | |
323 | gi->composite.max_speed = USB_SPEED_HIGH; | |
324 | else if (strncmp(page, "full-speed", 10) == 0) | |
325 | gi->composite.max_speed = USB_SPEED_FULL; | |
326 | else if (strncmp(page, "low-speed", 9) == 0) | |
327 | gi->composite.max_speed = USB_SPEED_LOW; | |
328 | else | |
329 | goto err; | |
330 | ||
331 | gi->composite.gadget_driver.max_speed = gi->composite.max_speed; | |
332 | ||
333 | mutex_unlock(&gi->lock); | |
334 | return len; | |
335 | err: | |
336 | mutex_unlock(&gi->lock); | |
337 | return -EINVAL; | |
338 | } | |
339 | ||
45b6a73f CH |
340 | CONFIGFS_ATTR(gadget_dev_desc_, bDeviceClass); |
341 | CONFIGFS_ATTR(gadget_dev_desc_, bDeviceSubClass); | |
342 | CONFIGFS_ATTR(gadget_dev_desc_, bDeviceProtocol); | |
343 | CONFIGFS_ATTR(gadget_dev_desc_, bMaxPacketSize0); | |
344 | CONFIGFS_ATTR(gadget_dev_desc_, idVendor); | |
345 | CONFIGFS_ATTR(gadget_dev_desc_, idProduct); | |
346 | CONFIGFS_ATTR(gadget_dev_desc_, bcdDevice); | |
347 | CONFIGFS_ATTR(gadget_dev_desc_, bcdUSB); | |
348 | CONFIGFS_ATTR(gadget_dev_desc_, UDC); | |
a0249703 | 349 | CONFIGFS_ATTR(gadget_dev_desc_, max_speed); |
88af8bbe SAS |
350 | |
351 | static struct configfs_attribute *gadget_root_attrs[] = { | |
45b6a73f CH |
352 | &gadget_dev_desc_attr_bDeviceClass, |
353 | &gadget_dev_desc_attr_bDeviceSubClass, | |
354 | &gadget_dev_desc_attr_bDeviceProtocol, | |
355 | &gadget_dev_desc_attr_bMaxPacketSize0, | |
356 | &gadget_dev_desc_attr_idVendor, | |
357 | &gadget_dev_desc_attr_idProduct, | |
358 | &gadget_dev_desc_attr_bcdDevice, | |
359 | &gadget_dev_desc_attr_bcdUSB, | |
360 | &gadget_dev_desc_attr_UDC, | |
a0249703 | 361 | &gadget_dev_desc_attr_max_speed, |
88af8bbe SAS |
362 | NULL, |
363 | }; | |
364 | ||
88af8bbe SAS |
365 | static inline struct gadget_strings *to_gadget_strings(struct config_item *item) |
366 | { | |
367 | return container_of(to_config_group(item), struct gadget_strings, | |
368 | group); | |
369 | } | |
370 | ||
371 | static inline struct gadget_config_name *to_gadget_config_name( | |
372 | struct config_item *item) | |
373 | { | |
374 | return container_of(to_config_group(item), struct gadget_config_name, | |
375 | group); | |
376 | } | |
377 | ||
88af8bbe SAS |
378 | static inline struct usb_function_instance *to_usb_function_instance( |
379 | struct config_item *item) | |
380 | { | |
381 | return container_of(to_config_group(item), | |
382 | struct usb_function_instance, group); | |
383 | } | |
384 | ||
385 | static void gadget_info_attr_release(struct config_item *item) | |
386 | { | |
387 | struct gadget_info *gi = to_gadget_info(item); | |
388 | ||
389 | WARN_ON(!list_empty(&gi->cdev.configs)); | |
390 | WARN_ON(!list_empty(&gi->string_list)); | |
391 | WARN_ON(!list_empty(&gi->available_func)); | |
392 | kfree(gi->composite.gadget_driver.function); | |
393 | kfree(gi); | |
394 | } | |
395 | ||
88af8bbe SAS |
396 | static struct configfs_item_operations gadget_root_item_ops = { |
397 | .release = gadget_info_attr_release, | |
88af8bbe SAS |
398 | }; |
399 | ||
400 | static void gadget_config_attr_release(struct config_item *item) | |
401 | { | |
402 | struct config_usb_cfg *cfg = to_config_usb_cfg(item); | |
403 | ||
404 | WARN_ON(!list_empty(&cfg->c.functions)); | |
405 | list_del(&cfg->c.list); | |
406 | kfree(cfg->c.label); | |
407 | kfree(cfg); | |
408 | } | |
409 | ||
410 | static int config_usb_cfg_link( | |
411 | struct config_item *usb_cfg_ci, | |
412 | struct config_item *usb_func_ci) | |
413 | { | |
414 | struct config_usb_cfg *cfg = to_config_usb_cfg(usb_cfg_ci); | |
415 | struct usb_composite_dev *cdev = cfg->c.cdev; | |
416 | struct gadget_info *gi = container_of(cdev, struct gadget_info, cdev); | |
417 | ||
418 | struct config_group *group = to_config_group(usb_func_ci); | |
419 | struct usb_function_instance *fi = container_of(group, | |
420 | struct usb_function_instance, group); | |
421 | struct usb_function_instance *a_fi; | |
422 | struct usb_function *f; | |
423 | int ret; | |
424 | ||
425 | mutex_lock(&gi->lock); | |
426 | /* | |
427 | * Make sure this function is from within our _this_ gadget and not | |
428 | * from another gadget or a random directory. | |
429 | * Also a function instance can only be linked once. | |
430 | */ | |
431 | list_for_each_entry(a_fi, &gi->available_func, cfs_list) { | |
432 | if (a_fi == fi) | |
433 | break; | |
434 | } | |
435 | if (a_fi != fi) { | |
436 | ret = -EINVAL; | |
437 | goto out; | |
438 | } | |
439 | ||
440 | list_for_each_entry(f, &cfg->func_list, list) { | |
441 | if (f->fi == fi) { | |
442 | ret = -EEXIST; | |
443 | goto out; | |
444 | } | |
445 | } | |
446 | ||
447 | f = usb_get_function(fi); | |
448 | if (IS_ERR(f)) { | |
449 | ret = PTR_ERR(f); | |
450 | goto out; | |
451 | } | |
452 | ||
453 | /* stash the function until we bind it to the gadget */ | |
454 | list_add_tail(&f->list, &cfg->func_list); | |
455 | ret = 0; | |
456 | out: | |
457 | mutex_unlock(&gi->lock); | |
458 | return ret; | |
459 | } | |
460 | ||
e16769d4 | 461 | static void config_usb_cfg_unlink( |
88af8bbe SAS |
462 | struct config_item *usb_cfg_ci, |
463 | struct config_item *usb_func_ci) | |
464 | { | |
465 | struct config_usb_cfg *cfg = to_config_usb_cfg(usb_cfg_ci); | |
466 | struct usb_composite_dev *cdev = cfg->c.cdev; | |
467 | struct gadget_info *gi = container_of(cdev, struct gadget_info, cdev); | |
468 | ||
469 | struct config_group *group = to_config_group(usb_func_ci); | |
470 | struct usb_function_instance *fi = container_of(group, | |
471 | struct usb_function_instance, group); | |
472 | struct usb_function *f; | |
473 | ||
474 | /* | |
475 | * ideally I would like to forbid to unlink functions while a gadget is | |
476 | * bound to an UDC. Since this isn't possible at the moment, we simply | |
477 | * force an unbind, the function is available here and then we can | |
478 | * remove the function. | |
479 | */ | |
480 | mutex_lock(&gi->lock); | |
afdaadc3 | 481 | if (gi->composite.gadget_driver.udc_name) |
88af8bbe | 482 | unregister_gadget(gi); |
afdaadc3 | 483 | WARN_ON(gi->composite.gadget_driver.udc_name); |
88af8bbe SAS |
484 | |
485 | list_for_each_entry(f, &cfg->func_list, list) { | |
486 | if (f->fi == fi) { | |
487 | list_del(&f->list); | |
488 | usb_put_function(f); | |
489 | mutex_unlock(&gi->lock); | |
e16769d4 | 490 | return; |
88af8bbe SAS |
491 | } |
492 | } | |
493 | mutex_unlock(&gi->lock); | |
75bfe23a | 494 | WARN(1, "Unable to locate function to unbind\n"); |
88af8bbe SAS |
495 | } |
496 | ||
88af8bbe SAS |
497 | static struct configfs_item_operations gadget_config_item_ops = { |
498 | .release = gadget_config_attr_release, | |
88af8bbe SAS |
499 | .allow_link = config_usb_cfg_link, |
500 | .drop_link = config_usb_cfg_unlink, | |
501 | }; | |
502 | ||
503 | ||
45b6a73f | 504 | static ssize_t gadget_config_desc_MaxPower_show(struct config_item *item, |
88af8bbe SAS |
505 | char *page) |
506 | { | |
45b6a73f | 507 | return sprintf(page, "%u\n", to_config_usb_cfg(item)->c.MaxPower); |
88af8bbe SAS |
508 | } |
509 | ||
45b6a73f | 510 | static ssize_t gadget_config_desc_MaxPower_store(struct config_item *item, |
88af8bbe SAS |
511 | const char *page, size_t len) |
512 | { | |
513 | u16 val; | |
514 | int ret; | |
515 | ret = kstrtou16(page, 0, &val); | |
516 | if (ret) | |
517 | return ret; | |
518 | if (DIV_ROUND_UP(val, 8) > 0xff) | |
519 | return -ERANGE; | |
45b6a73f | 520 | to_config_usb_cfg(item)->c.MaxPower = val; |
88af8bbe SAS |
521 | return len; |
522 | } | |
523 | ||
45b6a73f | 524 | static ssize_t gadget_config_desc_bmAttributes_show(struct config_item *item, |
88af8bbe SAS |
525 | char *page) |
526 | { | |
45b6a73f CH |
527 | return sprintf(page, "0x%02x\n", |
528 | to_config_usb_cfg(item)->c.bmAttributes); | |
88af8bbe SAS |
529 | } |
530 | ||
45b6a73f | 531 | static ssize_t gadget_config_desc_bmAttributes_store(struct config_item *item, |
88af8bbe SAS |
532 | const char *page, size_t len) |
533 | { | |
534 | u8 val; | |
535 | int ret; | |
536 | ret = kstrtou8(page, 0, &val); | |
537 | if (ret) | |
538 | return ret; | |
539 | if (!(val & USB_CONFIG_ATT_ONE)) | |
540 | return -EINVAL; | |
541 | if (val & ~(USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER | | |
542 | USB_CONFIG_ATT_WAKEUP)) | |
543 | return -EINVAL; | |
45b6a73f | 544 | to_config_usb_cfg(item)->c.bmAttributes = val; |
88af8bbe SAS |
545 | return len; |
546 | } | |
547 | ||
45b6a73f CH |
548 | CONFIGFS_ATTR(gadget_config_desc_, MaxPower); |
549 | CONFIGFS_ATTR(gadget_config_desc_, bmAttributes); | |
88af8bbe SAS |
550 | |
551 | static struct configfs_attribute *gadget_config_attrs[] = { | |
45b6a73f CH |
552 | &gadget_config_desc_attr_MaxPower, |
553 | &gadget_config_desc_attr_bmAttributes, | |
88af8bbe SAS |
554 | NULL, |
555 | }; | |
556 | ||
4ad01412 | 557 | static const struct config_item_type gadget_config_type = { |
88af8bbe SAS |
558 | .ct_item_ops = &gadget_config_item_ops, |
559 | .ct_attrs = gadget_config_attrs, | |
560 | .ct_owner = THIS_MODULE, | |
561 | }; | |
562 | ||
4ad01412 | 563 | static const struct config_item_type gadget_root_type = { |
88af8bbe SAS |
564 | .ct_item_ops = &gadget_root_item_ops, |
565 | .ct_attrs = gadget_root_attrs, | |
566 | .ct_owner = THIS_MODULE, | |
567 | }; | |
568 | ||
569 | static void composite_init_dev(struct usb_composite_dev *cdev) | |
570 | { | |
571 | spin_lock_init(&cdev->lock); | |
572 | INIT_LIST_HEAD(&cdev->configs); | |
573 | INIT_LIST_HEAD(&cdev->gstrings); | |
574 | } | |
575 | ||
576 | static struct config_group *function_make( | |
577 | struct config_group *group, | |
578 | const char *name) | |
579 | { | |
580 | struct gadget_info *gi; | |
581 | struct usb_function_instance *fi; | |
582 | char buf[MAX_NAME_LEN]; | |
583 | char *func_name; | |
584 | char *instance_name; | |
585 | int ret; | |
586 | ||
587 | ret = snprintf(buf, MAX_NAME_LEN, "%s", name); | |
588 | if (ret >= MAX_NAME_LEN) | |
589 | return ERR_PTR(-ENAMETOOLONG); | |
590 | ||
591 | func_name = buf; | |
592 | instance_name = strchr(func_name, '.'); | |
593 | if (!instance_name) { | |
594 | pr_err("Unable to locate . in FUNC.INSTANCE\n"); | |
595 | return ERR_PTR(-EINVAL); | |
596 | } | |
597 | *instance_name = '\0'; | |
598 | instance_name++; | |
599 | ||
600 | fi = usb_get_function_instance(func_name); | |
601 | if (IS_ERR(fi)) | |
a3469411 | 602 | return ERR_CAST(fi); |
88af8bbe | 603 | |
3958b792 | 604 | ret = config_item_set_name(&fi->group.cg_item, "%s", name); |
88af8bbe SAS |
605 | if (ret) { |
606 | usb_put_function_instance(fi); | |
607 | return ERR_PTR(ret); | |
608 | } | |
1933861d AP |
609 | if (fi->set_inst_name) { |
610 | ret = fi->set_inst_name(fi, instance_name); | |
611 | if (ret) { | |
612 | usb_put_function_instance(fi); | |
613 | return ERR_PTR(ret); | |
614 | } | |
615 | } | |
88af8bbe SAS |
616 | |
617 | gi = container_of(group, struct gadget_info, functions_group); | |
618 | ||
619 | mutex_lock(&gi->lock); | |
620 | list_add_tail(&fi->cfs_list, &gi->available_func); | |
621 | mutex_unlock(&gi->lock); | |
622 | return &fi->group; | |
623 | } | |
624 | ||
625 | static void function_drop( | |
626 | struct config_group *group, | |
627 | struct config_item *item) | |
628 | { | |
629 | struct usb_function_instance *fi = to_usb_function_instance(item); | |
630 | struct gadget_info *gi; | |
631 | ||
632 | gi = container_of(group, struct gadget_info, functions_group); | |
633 | ||
634 | mutex_lock(&gi->lock); | |
635 | list_del(&fi->cfs_list); | |
636 | mutex_unlock(&gi->lock); | |
637 | config_item_put(item); | |
638 | } | |
639 | ||
640 | static struct configfs_group_operations functions_ops = { | |
641 | .make_group = &function_make, | |
642 | .drop_item = &function_drop, | |
643 | }; | |
644 | ||
4ad01412 | 645 | static const struct config_item_type functions_type = { |
88af8bbe SAS |
646 | .ct_group_ops = &functions_ops, |
647 | .ct_owner = THIS_MODULE, | |
648 | }; | |
649 | ||
88af8bbe SAS |
650 | GS_STRINGS_RW(gadget_config_name, configuration); |
651 | ||
652 | static struct configfs_attribute *gadget_config_name_langid_attrs[] = { | |
45b6a73f | 653 | &gadget_config_name_attr_configuration, |
88af8bbe SAS |
654 | NULL, |
655 | }; | |
656 | ||
657 | static void gadget_config_name_attr_release(struct config_item *item) | |
658 | { | |
659 | struct gadget_config_name *cn = to_gadget_config_name(item); | |
660 | ||
661 | kfree(cn->configuration); | |
662 | ||
663 | list_del(&cn->list); | |
664 | kfree(cn); | |
665 | } | |
666 | ||
667 | USB_CONFIG_STRING_RW_OPS(gadget_config_name); | |
668 | USB_CONFIG_STRINGS_LANG(gadget_config_name, config_usb_cfg); | |
669 | ||
670 | static struct config_group *config_desc_make( | |
671 | struct config_group *group, | |
672 | const char *name) | |
673 | { | |
674 | struct gadget_info *gi; | |
675 | struct config_usb_cfg *cfg; | |
676 | char buf[MAX_NAME_LEN]; | |
677 | char *num_str; | |
678 | u8 num; | |
679 | int ret; | |
680 | ||
681 | gi = container_of(group, struct gadget_info, configs_group); | |
682 | ret = snprintf(buf, MAX_NAME_LEN, "%s", name); | |
683 | if (ret >= MAX_NAME_LEN) | |
684 | return ERR_PTR(-ENAMETOOLONG); | |
685 | ||
686 | num_str = strchr(buf, '.'); | |
687 | if (!num_str) { | |
688 | pr_err("Unable to locate . in name.bConfigurationValue\n"); | |
689 | return ERR_PTR(-EINVAL); | |
690 | } | |
691 | ||
692 | *num_str = '\0'; | |
693 | num_str++; | |
694 | ||
695 | if (!strlen(buf)) | |
696 | return ERR_PTR(-EINVAL); | |
697 | ||
698 | ret = kstrtou8(num_str, 0, &num); | |
699 | if (ret) | |
700 | return ERR_PTR(ret); | |
701 | ||
702 | cfg = kzalloc(sizeof(*cfg), GFP_KERNEL); | |
703 | if (!cfg) | |
704 | return ERR_PTR(-ENOMEM); | |
705 | cfg->c.label = kstrdup(buf, GFP_KERNEL); | |
706 | if (!cfg->c.label) { | |
707 | ret = -ENOMEM; | |
708 | goto err; | |
709 | } | |
710 | cfg->c.bConfigurationValue = num; | |
711 | cfg->c.MaxPower = CONFIG_USB_GADGET_VBUS_DRAW; | |
712 | cfg->c.bmAttributes = USB_CONFIG_ATT_ONE; | |
713 | INIT_LIST_HEAD(&cfg->string_list); | |
714 | INIT_LIST_HEAD(&cfg->func_list); | |
715 | ||
88af8bbe SAS |
716 | config_group_init_type_name(&cfg->group, name, |
717 | &gadget_config_type); | |
1ae1602d | 718 | |
88af8bbe SAS |
719 | config_group_init_type_name(&cfg->strings_group, "strings", |
720 | &gadget_config_name_strings_type); | |
1ae1602d | 721 | configfs_add_default_group(&cfg->strings_group, &cfg->group); |
88af8bbe SAS |
722 | |
723 | ret = usb_add_config_only(&gi->cdev, &cfg->c); | |
724 | if (ret) | |
725 | goto err; | |
726 | ||
727 | return &cfg->group; | |
728 | err: | |
729 | kfree(cfg->c.label); | |
730 | kfree(cfg); | |
731 | return ERR_PTR(ret); | |
732 | } | |
733 | ||
734 | static void config_desc_drop( | |
735 | struct config_group *group, | |
736 | struct config_item *item) | |
737 | { | |
738 | config_item_put(item); | |
739 | } | |
740 | ||
741 | static struct configfs_group_operations config_desc_ops = { | |
742 | .make_group = &config_desc_make, | |
743 | .drop_item = &config_desc_drop, | |
744 | }; | |
745 | ||
4ad01412 | 746 | static const struct config_item_type config_desc_type = { |
88af8bbe SAS |
747 | .ct_group_ops = &config_desc_ops, |
748 | .ct_owner = THIS_MODULE, | |
749 | }; | |
750 | ||
88af8bbe SAS |
751 | GS_STRINGS_RW(gadget_strings, manufacturer); |
752 | GS_STRINGS_RW(gadget_strings, product); | |
753 | GS_STRINGS_RW(gadget_strings, serialnumber); | |
754 | ||
755 | static struct configfs_attribute *gadget_strings_langid_attrs[] = { | |
45b6a73f CH |
756 | &gadget_strings_attr_manufacturer, |
757 | &gadget_strings_attr_product, | |
758 | &gadget_strings_attr_serialnumber, | |
88af8bbe SAS |
759 | NULL, |
760 | }; | |
761 | ||
762 | static void gadget_strings_attr_release(struct config_item *item) | |
763 | { | |
764 | struct gadget_strings *gs = to_gadget_strings(item); | |
765 | ||
766 | kfree(gs->manufacturer); | |
767 | kfree(gs->product); | |
768 | kfree(gs->serialnumber); | |
769 | ||
770 | list_del(&gs->list); | |
771 | kfree(gs); | |
772 | } | |
773 | ||
774 | USB_CONFIG_STRING_RW_OPS(gadget_strings); | |
775 | USB_CONFIG_STRINGS_LANG(gadget_strings, gadget_info); | |
776 | ||
87213d38 AP |
777 | static inline struct os_desc *to_os_desc(struct config_item *item) |
778 | { | |
779 | return container_of(to_config_group(item), struct os_desc, group); | |
780 | } | |
781 | ||
45b6a73f CH |
782 | static inline struct gadget_info *os_desc_item_to_gadget_info( |
783 | struct config_item *item) | |
87213d38 | 784 | { |
45b6a73f CH |
785 | return to_gadget_info(to_os_desc(item)->group.cg_item.ci_parent); |
786 | } | |
87213d38 | 787 | |
45b6a73f CH |
788 | static ssize_t os_desc_use_show(struct config_item *item, char *page) |
789 | { | |
e800e8cb | 790 | return sprintf(page, "%d\n", |
45b6a73f | 791 | os_desc_item_to_gadget_info(item)->use_os_desc); |
87213d38 AP |
792 | } |
793 | ||
45b6a73f | 794 | static ssize_t os_desc_use_store(struct config_item *item, const char *page, |
87213d38 AP |
795 | size_t len) |
796 | { | |
45b6a73f | 797 | struct gadget_info *gi = os_desc_item_to_gadget_info(item); |
87213d38 AP |
798 | int ret; |
799 | bool use; | |
800 | ||
87213d38 AP |
801 | mutex_lock(&gi->lock); |
802 | ret = strtobool(page, &use); | |
803 | if (!ret) { | |
804 | gi->use_os_desc = use; | |
805 | ret = len; | |
806 | } | |
807 | mutex_unlock(&gi->lock); | |
808 | ||
809 | return ret; | |
810 | } | |
811 | ||
45b6a73f | 812 | static ssize_t os_desc_b_vendor_code_show(struct config_item *item, char *page) |
87213d38 | 813 | { |
e800e8cb | 814 | return sprintf(page, "0x%02x\n", |
45b6a73f | 815 | os_desc_item_to_gadget_info(item)->b_vendor_code); |
87213d38 AP |
816 | } |
817 | ||
45b6a73f | 818 | static ssize_t os_desc_b_vendor_code_store(struct config_item *item, |
87213d38 AP |
819 | const char *page, size_t len) |
820 | { | |
45b6a73f | 821 | struct gadget_info *gi = os_desc_item_to_gadget_info(item); |
87213d38 AP |
822 | int ret; |
823 | u8 b_vendor_code; | |
824 | ||
87213d38 AP |
825 | mutex_lock(&gi->lock); |
826 | ret = kstrtou8(page, 0, &b_vendor_code); | |
827 | if (!ret) { | |
828 | gi->b_vendor_code = b_vendor_code; | |
829 | ret = len; | |
830 | } | |
831 | mutex_unlock(&gi->lock); | |
832 | ||
833 | return ret; | |
834 | } | |
835 | ||
45b6a73f | 836 | static ssize_t os_desc_qw_sign_show(struct config_item *item, char *page) |
87213d38 | 837 | { |
45b6a73f | 838 | struct gadget_info *gi = os_desc_item_to_gadget_info(item); |
76180d71 | 839 | int res; |
87213d38 | 840 | |
76180d71 SA |
841 | res = utf16s_to_utf8s((wchar_t *) gi->qw_sign, OS_STRING_QW_SIGN_LEN, |
842 | UTF16_LITTLE_ENDIAN, page, PAGE_SIZE - 1); | |
843 | page[res++] = '\n'; | |
844 | ||
845 | return res; | |
87213d38 AP |
846 | } |
847 | ||
45b6a73f | 848 | static ssize_t os_desc_qw_sign_store(struct config_item *item, const char *page, |
87213d38 AP |
849 | size_t len) |
850 | { | |
45b6a73f | 851 | struct gadget_info *gi = os_desc_item_to_gadget_info(item); |
87213d38 AP |
852 | int res, l; |
853 | ||
87213d38 AP |
854 | l = min((int)len, OS_STRING_QW_SIGN_LEN >> 1); |
855 | if (page[l - 1] == '\n') | |
856 | --l; | |
857 | ||
858 | mutex_lock(&gi->lock); | |
859 | res = utf8s_to_utf16s(page, l, | |
860 | UTF16_LITTLE_ENDIAN, (wchar_t *) gi->qw_sign, | |
861 | OS_STRING_QW_SIGN_LEN); | |
862 | if (res > 0) | |
863 | res = len; | |
864 | mutex_unlock(&gi->lock); | |
865 | ||
866 | return res; | |
867 | } | |
868 | ||
45b6a73f CH |
869 | CONFIGFS_ATTR(os_desc_, use); |
870 | CONFIGFS_ATTR(os_desc_, b_vendor_code); | |
871 | CONFIGFS_ATTR(os_desc_, qw_sign); | |
87213d38 AP |
872 | |
873 | static struct configfs_attribute *os_desc_attrs[] = { | |
45b6a73f CH |
874 | &os_desc_attr_use, |
875 | &os_desc_attr_b_vendor_code, | |
876 | &os_desc_attr_qw_sign, | |
87213d38 AP |
877 | NULL, |
878 | }; | |
879 | ||
880 | static void os_desc_attr_release(struct config_item *item) | |
881 | { | |
882 | struct os_desc *os_desc = to_os_desc(item); | |
883 | kfree(os_desc); | |
884 | } | |
885 | ||
da424314 AP |
886 | static int os_desc_link(struct config_item *os_desc_ci, |
887 | struct config_item *usb_cfg_ci) | |
888 | { | |
889 | struct gadget_info *gi = container_of(to_config_group(os_desc_ci), | |
890 | struct gadget_info, os_desc_group); | |
891 | struct usb_composite_dev *cdev = &gi->cdev; | |
892 | struct config_usb_cfg *c_target = | |
893 | container_of(to_config_group(usb_cfg_ci), | |
894 | struct config_usb_cfg, group); | |
895 | struct usb_configuration *c; | |
896 | int ret; | |
897 | ||
898 | mutex_lock(&gi->lock); | |
899 | list_for_each_entry(c, &cdev->configs, list) { | |
900 | if (c == &c_target->c) | |
901 | break; | |
902 | } | |
903 | if (c != &c_target->c) { | |
904 | ret = -EINVAL; | |
905 | goto out; | |
906 | } | |
907 | ||
908 | if (cdev->os_desc_config) { | |
909 | ret = -EBUSY; | |
910 | goto out; | |
911 | } | |
912 | ||
913 | cdev->os_desc_config = &c_target->c; | |
914 | ret = 0; | |
915 | ||
916 | out: | |
917 | mutex_unlock(&gi->lock); | |
918 | return ret; | |
919 | } | |
920 | ||
e16769d4 | 921 | static void os_desc_unlink(struct config_item *os_desc_ci, |
da424314 AP |
922 | struct config_item *usb_cfg_ci) |
923 | { | |
924 | struct gadget_info *gi = container_of(to_config_group(os_desc_ci), | |
925 | struct gadget_info, os_desc_group); | |
926 | struct usb_composite_dev *cdev = &gi->cdev; | |
927 | ||
928 | mutex_lock(&gi->lock); | |
afdaadc3 | 929 | if (gi->composite.gadget_driver.udc_name) |
da424314 AP |
930 | unregister_gadget(gi); |
931 | cdev->os_desc_config = NULL; | |
afdaadc3 | 932 | WARN_ON(gi->composite.gadget_driver.udc_name); |
da424314 | 933 | mutex_unlock(&gi->lock); |
da424314 AP |
934 | } |
935 | ||
87213d38 AP |
936 | static struct configfs_item_operations os_desc_ops = { |
937 | .release = os_desc_attr_release, | |
da424314 AP |
938 | .allow_link = os_desc_link, |
939 | .drop_link = os_desc_unlink, | |
87213d38 AP |
940 | }; |
941 | ||
942 | static struct config_item_type os_desc_type = { | |
943 | .ct_item_ops = &os_desc_ops, | |
944 | .ct_attrs = os_desc_attrs, | |
945 | .ct_owner = THIS_MODULE, | |
946 | }; | |
947 | ||
7419485f AP |
948 | static inline struct usb_os_desc_ext_prop |
949 | *to_usb_os_desc_ext_prop(struct config_item *item) | |
950 | { | |
951 | return container_of(item, struct usb_os_desc_ext_prop, item); | |
952 | } | |
953 | ||
45b6a73f | 954 | static ssize_t ext_prop_type_show(struct config_item *item, char *page) |
7419485f | 955 | { |
e800e8cb | 956 | return sprintf(page, "%d\n", to_usb_os_desc_ext_prop(item)->type); |
7419485f AP |
957 | } |
958 | ||
45b6a73f | 959 | static ssize_t ext_prop_type_store(struct config_item *item, |
7419485f AP |
960 | const char *page, size_t len) |
961 | { | |
45b6a73f | 962 | struct usb_os_desc_ext_prop *ext_prop = to_usb_os_desc_ext_prop(item); |
7419485f AP |
963 | struct usb_os_desc *desc = to_usb_os_desc(ext_prop->item.ci_parent); |
964 | u8 type; | |
965 | int ret; | |
966 | ||
967 | if (desc->opts_mutex) | |
968 | mutex_lock(desc->opts_mutex); | |
969 | ret = kstrtou8(page, 0, &type); | |
970 | if (ret) | |
971 | goto end; | |
972 | if (type < USB_EXT_PROP_UNICODE || type > USB_EXT_PROP_UNICODE_MULTI) { | |
973 | ret = -EINVAL; | |
974 | goto end; | |
975 | } | |
976 | ||
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; | |
992 | ret = len; | |
993 | ||
994 | end: | |
995 | if (desc->opts_mutex) | |
996 | mutex_unlock(desc->opts_mutex); | |
997 | return ret; | |
998 | } | |
999 | ||
45b6a73f | 1000 | static ssize_t ext_prop_data_show(struct config_item *item, char *page) |
7419485f | 1001 | { |
45b6a73f | 1002 | struct usb_os_desc_ext_prop *ext_prop = to_usb_os_desc_ext_prop(item); |
7419485f AP |
1003 | int len = ext_prop->data_len; |
1004 | ||
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) | |
1008 | len >>= 1; | |
1009 | memcpy(page, ext_prop->data, len); | |
1010 | ||
1011 | return len; | |
1012 | } | |
1013 | ||
45b6a73f | 1014 | static ssize_t ext_prop_data_store(struct config_item *item, |
7419485f AP |
1015 | const char *page, size_t len) |
1016 | { | |
45b6a73f | 1017 | struct usb_os_desc_ext_prop *ext_prop = to_usb_os_desc_ext_prop(item); |
7419485f AP |
1018 | struct usb_os_desc *desc = to_usb_os_desc(ext_prop->item.ci_parent); |
1019 | char *new_data; | |
1020 | size_t ret_len = len; | |
1021 | ||
1022 | if (page[len - 1] == '\n' || page[len - 1] == '\0') | |
1023 | --len; | |
58b949e0 | 1024 | new_data = kmemdup(page, len, GFP_KERNEL); |
7419485f AP |
1025 | if (!new_data) |
1026 | return -ENOMEM; | |
1027 | ||
7419485f AP |
1028 | if (desc->opts_mutex) |
1029 | mutex_lock(desc->opts_mutex); | |
1030 | kfree(ext_prop->data); | |
1031 | ext_prop->data = new_data; | |
1032 | desc->ext_prop_len -= ext_prop->data_len; | |
1033 | ext_prop->data_len = len; | |
1034 | desc->ext_prop_len += ext_prop->data_len; | |
1035 | if (ext_prop->type == USB_EXT_PROP_UNICODE || | |
1036 | ext_prop->type == USB_EXT_PROP_UNICODE_ENV || | |
1037 | ext_prop->type == USB_EXT_PROP_UNICODE_LINK) { | |
1038 | desc->ext_prop_len -= ext_prop->data_len; | |
1039 | ext_prop->data_len <<= 1; | |
1040 | ext_prop->data_len += 2; | |
1041 | desc->ext_prop_len += ext_prop->data_len; | |
1042 | } | |
1043 | if (desc->opts_mutex) | |
1044 | mutex_unlock(desc->opts_mutex); | |
1045 | return ret_len; | |
1046 | } | |
1047 | ||
45b6a73f CH |
1048 | CONFIGFS_ATTR(ext_prop_, type); |
1049 | CONFIGFS_ATTR(ext_prop_, data); | |
7419485f AP |
1050 | |
1051 | static struct configfs_attribute *ext_prop_attrs[] = { | |
45b6a73f CH |
1052 | &ext_prop_attr_type, |
1053 | &ext_prop_attr_data, | |
7419485f AP |
1054 | NULL, |
1055 | }; | |
1056 | ||
1057 | static void usb_os_desc_ext_prop_release(struct config_item *item) | |
1058 | { | |
1059 | struct usb_os_desc_ext_prop *ext_prop = to_usb_os_desc_ext_prop(item); | |
1060 | ||
1061 | kfree(ext_prop); /* frees a whole chunk */ | |
1062 | } | |
1063 | ||
1064 | static struct configfs_item_operations ext_prop_ops = { | |
1065 | .release = usb_os_desc_ext_prop_release, | |
7419485f AP |
1066 | }; |
1067 | ||
1068 | static struct config_item *ext_prop_make( | |
1069 | struct config_group *group, | |
1070 | const char *name) | |
1071 | { | |
1072 | struct usb_os_desc_ext_prop *ext_prop; | |
1073 | struct config_item_type *ext_prop_type; | |
1074 | struct usb_os_desc *desc; | |
1075 | char *vlabuf; | |
1076 | ||
1077 | vla_group(data_chunk); | |
1078 | vla_item(data_chunk, struct usb_os_desc_ext_prop, ext_prop, 1); | |
1079 | vla_item(data_chunk, struct config_item_type, ext_prop_type, 1); | |
1080 | ||
1081 | vlabuf = kzalloc(vla_group_size(data_chunk), GFP_KERNEL); | |
1082 | if (!vlabuf) | |
1083 | return ERR_PTR(-ENOMEM); | |
1084 | ||
1085 | ext_prop = vla_ptr(vlabuf, data_chunk, ext_prop); | |
1086 | ext_prop_type = vla_ptr(vlabuf, data_chunk, ext_prop_type); | |
1087 | ||
1088 | desc = container_of(group, struct usb_os_desc, group); | |
1089 | ext_prop_type->ct_item_ops = &ext_prop_ops; | |
1090 | ext_prop_type->ct_attrs = ext_prop_attrs; | |
1091 | ext_prop_type->ct_owner = desc->owner; | |
1092 | ||
1093 | config_item_init_type_name(&ext_prop->item, name, ext_prop_type); | |
1094 | ||
1095 | ext_prop->name = kstrdup(name, GFP_KERNEL); | |
1096 | if (!ext_prop->name) { | |
1097 | kfree(vlabuf); | |
1098 | return ERR_PTR(-ENOMEM); | |
1099 | } | |
1100 | desc->ext_prop_len += 14; | |
1101 | ext_prop->name_len = 2 * strlen(ext_prop->name) + 2; | |
1102 | if (desc->opts_mutex) | |
1103 | mutex_lock(desc->opts_mutex); | |
1104 | desc->ext_prop_len += ext_prop->name_len; | |
1105 | list_add_tail(&ext_prop->entry, &desc->ext_prop); | |
1106 | ++desc->ext_prop_count; | |
1107 | if (desc->opts_mutex) | |
1108 | mutex_unlock(desc->opts_mutex); | |
1109 | ||
1110 | return &ext_prop->item; | |
1111 | } | |
1112 | ||
1113 | static void ext_prop_drop(struct config_group *group, struct config_item *item) | |
1114 | { | |
1115 | struct usb_os_desc_ext_prop *ext_prop = to_usb_os_desc_ext_prop(item); | |
1116 | struct usb_os_desc *desc = to_usb_os_desc(&group->cg_item); | |
1117 | ||
1118 | if (desc->opts_mutex) | |
1119 | mutex_lock(desc->opts_mutex); | |
1120 | list_del(&ext_prop->entry); | |
1121 | --desc->ext_prop_count; | |
1122 | kfree(ext_prop->name); | |
1123 | desc->ext_prop_len -= (ext_prop->name_len + ext_prop->data_len + 14); | |
1124 | if (desc->opts_mutex) | |
1125 | mutex_unlock(desc->opts_mutex); | |
1126 | config_item_put(item); | |
1127 | } | |
1128 | ||
1129 | static struct configfs_group_operations interf_grp_ops = { | |
1130 | .make_item = &ext_prop_make, | |
1131 | .drop_item = &ext_prop_drop, | |
1132 | }; | |
1133 | ||
45b6a73f | 1134 | static ssize_t interf_grp_compatible_id_show(struct config_item *item, |
fe00b138 | 1135 | char *page) |
da424314 | 1136 | { |
45b6a73f | 1137 | memcpy(page, to_usb_os_desc(item)->ext_compat_id, 8); |
da424314 AP |
1138 | return 8; |
1139 | } | |
1140 | ||
45b6a73f | 1141 | static ssize_t interf_grp_compatible_id_store(struct config_item *item, |
fe00b138 | 1142 | const char *page, size_t len) |
da424314 | 1143 | { |
45b6a73f | 1144 | struct usb_os_desc *desc = to_usb_os_desc(item); |
da424314 AP |
1145 | int l; |
1146 | ||
1147 | l = min_t(int, 8, len); | |
1148 | if (page[l - 1] == '\n') | |
1149 | --l; | |
1150 | if (desc->opts_mutex) | |
1151 | mutex_lock(desc->opts_mutex); | |
1152 | memcpy(desc->ext_compat_id, page, l); | |
da424314 AP |
1153 | |
1154 | if (desc->opts_mutex) | |
1155 | mutex_unlock(desc->opts_mutex); | |
1156 | ||
1157 | return len; | |
1158 | } | |
1159 | ||
45b6a73f | 1160 | static ssize_t interf_grp_sub_compatible_id_show(struct config_item *item, |
fe00b138 | 1161 | char *page) |
da424314 | 1162 | { |
45b6a73f | 1163 | memcpy(page, to_usb_os_desc(item)->ext_compat_id + 8, 8); |
da424314 AP |
1164 | return 8; |
1165 | } | |
1166 | ||
45b6a73f | 1167 | static ssize_t interf_grp_sub_compatible_id_store(struct config_item *item, |
fe00b138 | 1168 | const char *page, size_t len) |
da424314 | 1169 | { |
45b6a73f | 1170 | struct usb_os_desc *desc = to_usb_os_desc(item); |
da424314 AP |
1171 | int l; |
1172 | ||
1173 | l = min_t(int, 8, len); | |
1174 | if (page[l - 1] == '\n') | |
1175 | --l; | |
1176 | if (desc->opts_mutex) | |
1177 | mutex_lock(desc->opts_mutex); | |
1178 | memcpy(desc->ext_compat_id + 8, page, l); | |
da424314 AP |
1179 | |
1180 | if (desc->opts_mutex) | |
1181 | mutex_unlock(desc->opts_mutex); | |
1182 | ||
1183 | return len; | |
1184 | } | |
1185 | ||
45b6a73f CH |
1186 | CONFIGFS_ATTR(interf_grp_, compatible_id); |
1187 | CONFIGFS_ATTR(interf_grp_, sub_compatible_id); | |
da424314 AP |
1188 | |
1189 | static struct configfs_attribute *interf_grp_attrs[] = { | |
45b6a73f CH |
1190 | &interf_grp_attr_compatible_id, |
1191 | &interf_grp_attr_sub_compatible_id, | |
da424314 AP |
1192 | NULL |
1193 | }; | |
1194 | ||
ff74745e AG |
1195 | struct config_group *usb_os_desc_prepare_interf_dir( |
1196 | struct config_group *parent, | |
1197 | int n_interf, | |
1198 | struct usb_os_desc **desc, | |
1199 | char **names, | |
1200 | struct module *owner) | |
da424314 | 1201 | { |
1ae1602d | 1202 | struct config_group *os_desc_group; |
da424314 AP |
1203 | struct config_item_type *os_desc_type, *interface_type; |
1204 | ||
1205 | vla_group(data_chunk); | |
da424314 | 1206 | vla_item(data_chunk, struct config_group, os_desc_group, 1); |
da424314 AP |
1207 | vla_item(data_chunk, struct config_item_type, os_desc_type, 1); |
1208 | vla_item(data_chunk, struct config_item_type, interface_type, 1); | |
1209 | ||
1210 | char *vlabuf = kzalloc(vla_group_size(data_chunk), GFP_KERNEL); | |
1211 | if (!vlabuf) | |
ff74745e | 1212 | return ERR_PTR(-ENOMEM); |
da424314 | 1213 | |
da424314 AP |
1214 | os_desc_group = vla_ptr(vlabuf, data_chunk, os_desc_group); |
1215 | os_desc_type = vla_ptr(vlabuf, data_chunk, os_desc_type); | |
da424314 AP |
1216 | interface_type = vla_ptr(vlabuf, data_chunk, interface_type); |
1217 | ||
da424314 AP |
1218 | os_desc_type->ct_owner = owner; |
1219 | config_group_init_type_name(os_desc_group, "os_desc", os_desc_type); | |
1ae1602d | 1220 | configfs_add_default_group(os_desc_group, parent); |
da424314 | 1221 | |
7419485f | 1222 | interface_type->ct_group_ops = &interf_grp_ops; |
da424314 AP |
1223 | interface_type->ct_attrs = interf_grp_attrs; |
1224 | interface_type->ct_owner = owner; | |
1225 | ||
1226 | while (n_interf--) { | |
1227 | struct usb_os_desc *d; | |
1228 | ||
1229 | d = desc[n_interf]; | |
7419485f | 1230 | d->owner = owner; |
da424314 | 1231 | config_group_init_type_name(&d->group, "", interface_type); |
14574b54 AP |
1232 | config_item_set_name(&d->group.cg_item, "interface.%s", |
1233 | names[n_interf]); | |
1ae1602d | 1234 | configfs_add_default_group(&d->group, os_desc_group); |
da424314 AP |
1235 | } |
1236 | ||
ff74745e | 1237 | return os_desc_group; |
da424314 AP |
1238 | } |
1239 | EXPORT_SYMBOL(usb_os_desc_prepare_interf_dir); | |
1240 | ||
88af8bbe SAS |
1241 | static int configfs_do_nothing(struct usb_composite_dev *cdev) |
1242 | { | |
75bfe23a | 1243 | WARN_ON(1); |
88af8bbe SAS |
1244 | return -EINVAL; |
1245 | } | |
1246 | ||
1247 | int composite_dev_prepare(struct usb_composite_driver *composite, | |
1248 | struct usb_composite_dev *dev); | |
1249 | ||
da424314 AP |
1250 | int composite_os_desc_req_prepare(struct usb_composite_dev *cdev, |
1251 | struct usb_ep *ep0); | |
1252 | ||
88af8bbe SAS |
1253 | static void purge_configs_funcs(struct gadget_info *gi) |
1254 | { | |
1255 | struct usb_configuration *c; | |
1256 | ||
1257 | list_for_each_entry(c, &gi->cdev.configs, list) { | |
1258 | struct usb_function *f, *tmp; | |
1259 | struct config_usb_cfg *cfg; | |
1260 | ||
1261 | cfg = container_of(c, struct config_usb_cfg, c); | |
1262 | ||
1263 | list_for_each_entry_safe(f, tmp, &c->functions, list) { | |
1264 | ||
1265 | list_move_tail(&f->list, &cfg->func_list); | |
1266 | if (f->unbind) { | |
da7b895d | 1267 | dev_dbg(&gi->cdev.gadget->dev, |
ad22a666 PS |
1268 | "unbind function '%s'/%p\n", |
1269 | f->name, f); | |
88af8bbe SAS |
1270 | f->unbind(c, f); |
1271 | } | |
1272 | } | |
1273 | c->next_interface_id = 0; | |
903124fe | 1274 | memset(c->interface, 0, sizeof(c->interface)); |
554eead5 | 1275 | c->superspeed_plus = 0; |
88af8bbe SAS |
1276 | c->superspeed = 0; |
1277 | c->highspeed = 0; | |
1278 | c->fullspeed = 0; | |
1279 | } | |
1280 | } | |
1281 | ||
1282 | static int configfs_composite_bind(struct usb_gadget *gadget, | |
1283 | struct usb_gadget_driver *gdriver) | |
1284 | { | |
1285 | struct usb_composite_driver *composite = to_cdriver(gdriver); | |
1286 | struct gadget_info *gi = container_of(composite, | |
1287 | struct gadget_info, composite); | |
1288 | struct usb_composite_dev *cdev = &gi->cdev; | |
1289 | struct usb_configuration *c; | |
1290 | struct usb_string *s; | |
1291 | unsigned i; | |
1292 | int ret; | |
1293 | ||
1294 | /* the gi->lock is hold by the caller */ | |
1a1c851b | 1295 | gi->unbind = 0; |
88af8bbe SAS |
1296 | cdev->gadget = gadget; |
1297 | set_gadget_data(gadget, cdev); | |
1298 | ret = composite_dev_prepare(composite, cdev); | |
1299 | if (ret) | |
1300 | return ret; | |
1301 | /* and now the gadget bind */ | |
1302 | ret = -EINVAL; | |
1303 | ||
1304 | if (list_empty(&gi->cdev.configs)) { | |
4d9f872c | 1305 | pr_err("Need at least one configuration in %s.\n", |
88af8bbe SAS |
1306 | gi->composite.name); |
1307 | goto err_comp_cleanup; | |
1308 | } | |
1309 | ||
1310 | ||
1311 | list_for_each_entry(c, &gi->cdev.configs, list) { | |
1312 | struct config_usb_cfg *cfg; | |
1313 | ||
1314 | cfg = container_of(c, struct config_usb_cfg, c); | |
1315 | if (list_empty(&cfg->func_list)) { | |
4d9f872c | 1316 | pr_err("Config %s/%d of %s needs at least one function.\n", |
88af8bbe SAS |
1317 | c->label, c->bConfigurationValue, |
1318 | gi->composite.name); | |
1319 | goto err_comp_cleanup; | |
1320 | } | |
1321 | } | |
1322 | ||
1323 | /* init all strings */ | |
1324 | if (!list_empty(&gi->string_list)) { | |
1325 | struct gadget_strings *gs; | |
1326 | ||
1327 | i = 0; | |
1328 | list_for_each_entry(gs, &gi->string_list, list) { | |
1329 | ||
1330 | gi->gstrings[i] = &gs->stringtab_dev; | |
1331 | gs->stringtab_dev.strings = gs->strings; | |
1332 | gs->strings[USB_GADGET_MANUFACTURER_IDX].s = | |
1333 | gs->manufacturer; | |
1334 | gs->strings[USB_GADGET_PRODUCT_IDX].s = gs->product; | |
1335 | gs->strings[USB_GADGET_SERIAL_IDX].s = gs->serialnumber; | |
1336 | i++; | |
1337 | } | |
1338 | gi->gstrings[i] = NULL; | |
1339 | s = usb_gstrings_attach(&gi->cdev, gi->gstrings, | |
1340 | USB_GADGET_FIRST_AVAIL_IDX); | |
fea77077 WY |
1341 | if (IS_ERR(s)) { |
1342 | ret = PTR_ERR(s); | |
88af8bbe | 1343 | goto err_comp_cleanup; |
fea77077 | 1344 | } |
88af8bbe SAS |
1345 | |
1346 | gi->cdev.desc.iManufacturer = s[USB_GADGET_MANUFACTURER_IDX].id; | |
1347 | gi->cdev.desc.iProduct = s[USB_GADGET_PRODUCT_IDX].id; | |
1348 | gi->cdev.desc.iSerialNumber = s[USB_GADGET_SERIAL_IDX].id; | |
1349 | } | |
1350 | ||
87213d38 AP |
1351 | if (gi->use_os_desc) { |
1352 | cdev->use_os_string = true; | |
1353 | cdev->b_vendor_code = gi->b_vendor_code; | |
1354 | memcpy(cdev->qw_sign, gi->qw_sign, OS_STRING_QW_SIGN_LEN); | |
1355 | } | |
1356 | ||
41ce84c8 LJ |
1357 | if (gadget_is_otg(gadget) && !otg_desc[0]) { |
1358 | struct usb_descriptor_header *usb_desc; | |
1359 | ||
1360 | usb_desc = usb_otg_descriptor_alloc(gadget); | |
1361 | if (!usb_desc) { | |
1362 | ret = -ENOMEM; | |
1363 | goto err_comp_cleanup; | |
1364 | } | |
1365 | usb_otg_descriptor_init(gadget, usb_desc); | |
1366 | otg_desc[0] = usb_desc; | |
1367 | otg_desc[1] = NULL; | |
1368 | } | |
1369 | ||
88af8bbe SAS |
1370 | /* Go through all configs, attach all functions */ |
1371 | list_for_each_entry(c, &gi->cdev.configs, list) { | |
1372 | struct config_usb_cfg *cfg; | |
1373 | struct usb_function *f; | |
1374 | struct usb_function *tmp; | |
1375 | struct gadget_config_name *cn; | |
1376 | ||
41ce84c8 LJ |
1377 | if (gadget_is_otg(gadget)) |
1378 | c->descriptors = otg_desc; | |
1379 | ||
88af8bbe SAS |
1380 | cfg = container_of(c, struct config_usb_cfg, c); |
1381 | if (!list_empty(&cfg->string_list)) { | |
1382 | i = 0; | |
1383 | list_for_each_entry(cn, &cfg->string_list, list) { | |
1384 | cfg->gstrings[i] = &cn->stringtab_dev; | |
1385 | cn->stringtab_dev.strings = &cn->strings; | |
1386 | cn->strings.s = cn->configuration; | |
1387 | i++; | |
1388 | } | |
1389 | cfg->gstrings[i] = NULL; | |
1390 | s = usb_gstrings_attach(&gi->cdev, cfg->gstrings, 1); | |
fea77077 WY |
1391 | if (IS_ERR(s)) { |
1392 | ret = PTR_ERR(s); | |
88af8bbe | 1393 | goto err_comp_cleanup; |
fea77077 | 1394 | } |
88af8bbe SAS |
1395 | c->iConfiguration = s[0].id; |
1396 | } | |
1397 | ||
1398 | list_for_each_entry_safe(f, tmp, &cfg->func_list, list) { | |
1399 | list_del(&f->list); | |
1400 | ret = usb_add_function(c, f); | |
5a68e9b5 AP |
1401 | if (ret) { |
1402 | list_add(&f->list, &cfg->func_list); | |
88af8bbe | 1403 | goto err_purge_funcs; |
5a68e9b5 | 1404 | } |
88af8bbe SAS |
1405 | } |
1406 | usb_ep_autoconfig_reset(cdev->gadget); | |
1407 | } | |
da424314 AP |
1408 | if (cdev->use_os_string) { |
1409 | ret = composite_os_desc_req_prepare(cdev, gadget->ep0); | |
1410 | if (ret) | |
1411 | goto err_purge_funcs; | |
1412 | } | |
1413 | ||
88af8bbe SAS |
1414 | usb_ep_autoconfig_reset(cdev->gadget); |
1415 | return 0; | |
1416 | ||
1417 | err_purge_funcs: | |
1418 | purge_configs_funcs(gi); | |
1419 | err_comp_cleanup: | |
1420 | composite_dev_cleanup(cdev); | |
1421 | return ret; | |
1422 | } | |
1423 | ||
1424 | static void configfs_composite_unbind(struct usb_gadget *gadget) | |
1425 | { | |
1426 | struct usb_composite_dev *cdev; | |
1427 | struct gadget_info *gi; | |
1a1c851b | 1428 | unsigned long flags; |
88af8bbe SAS |
1429 | |
1430 | /* the gi->lock is hold by the caller */ | |
1431 | ||
1432 | cdev = get_gadget_data(gadget); | |
1433 | gi = container_of(cdev, struct gadget_info, cdev); | |
1a1c851b PC |
1434 | spin_lock_irqsave(&gi->spinlock, flags); |
1435 | gi->unbind = 1; | |
1436 | spin_unlock_irqrestore(&gi->spinlock, flags); | |
88af8bbe | 1437 | |
41ce84c8 LJ |
1438 | kfree(otg_desc[0]); |
1439 | otg_desc[0] = NULL; | |
88af8bbe SAS |
1440 | purge_configs_funcs(gi); |
1441 | composite_dev_cleanup(cdev); | |
1442 | usb_ep_autoconfig_reset(cdev->gadget); | |
1a1c851b | 1443 | spin_lock_irqsave(&gi->spinlock, flags); |
88af8bbe SAS |
1444 | cdev->gadget = NULL; |
1445 | set_gadget_data(gadget, NULL); | |
1a1c851b PC |
1446 | spin_unlock_irqrestore(&gi->spinlock, flags); |
1447 | } | |
1448 | ||
1449 | static int configfs_composite_setup(struct usb_gadget *gadget, | |
1450 | const struct usb_ctrlrequest *ctrl) | |
1451 | { | |
1452 | struct usb_composite_dev *cdev; | |
1453 | struct gadget_info *gi; | |
1454 | unsigned long flags; | |
1455 | int ret; | |
1456 | ||
1457 | cdev = get_gadget_data(gadget); | |
1458 | if (!cdev) | |
1459 | return 0; | |
1460 | ||
1461 | gi = container_of(cdev, struct gadget_info, cdev); | |
1462 | spin_lock_irqsave(&gi->spinlock, flags); | |
1463 | cdev = get_gadget_data(gadget); | |
1464 | if (!cdev || gi->unbind) { | |
1465 | spin_unlock_irqrestore(&gi->spinlock, flags); | |
1466 | return 0; | |
1467 | } | |
1468 | ||
1469 | ret = composite_setup(gadget, ctrl); | |
1470 | spin_unlock_irqrestore(&gi->spinlock, flags); | |
1471 | return ret; | |
1472 | } | |
1473 | ||
1474 | static void configfs_composite_disconnect(struct usb_gadget *gadget) | |
1475 | { | |
1476 | struct usb_composite_dev *cdev; | |
1477 | struct gadget_info *gi; | |
1478 | unsigned long flags; | |
1479 | ||
1480 | cdev = get_gadget_data(gadget); | |
1481 | if (!cdev) | |
1482 | return; | |
1483 | ||
1484 | gi = container_of(cdev, struct gadget_info, cdev); | |
1485 | spin_lock_irqsave(&gi->spinlock, flags); | |
1486 | cdev = get_gadget_data(gadget); | |
1487 | if (!cdev || gi->unbind) { | |
1488 | spin_unlock_irqrestore(&gi->spinlock, flags); | |
1489 | return; | |
1490 | } | |
1491 | ||
1492 | composite_disconnect(gadget); | |
1493 | spin_unlock_irqrestore(&gi->spinlock, flags); | |
1494 | } | |
1495 | ||
1496 | static void configfs_composite_suspend(struct usb_gadget *gadget) | |
1497 | { | |
1498 | struct usb_composite_dev *cdev; | |
1499 | struct gadget_info *gi; | |
1500 | unsigned long flags; | |
1501 | ||
1502 | cdev = get_gadget_data(gadget); | |
1503 | if (!cdev) | |
1504 | return; | |
1505 | ||
1506 | gi = container_of(cdev, struct gadget_info, cdev); | |
1507 | spin_lock_irqsave(&gi->spinlock, flags); | |
1508 | cdev = get_gadget_data(gadget); | |
1509 | if (!cdev || gi->unbind) { | |
1510 | spin_unlock_irqrestore(&gi->spinlock, flags); | |
1511 | return; | |
1512 | } | |
1513 | ||
1514 | composite_suspend(gadget); | |
1515 | spin_unlock_irqrestore(&gi->spinlock, flags); | |
1516 | } | |
1517 | ||
1518 | static void configfs_composite_resume(struct usb_gadget *gadget) | |
1519 | { | |
1520 | struct usb_composite_dev *cdev; | |
1521 | struct gadget_info *gi; | |
1522 | unsigned long flags; | |
1523 | ||
1524 | cdev = get_gadget_data(gadget); | |
1525 | if (!cdev) | |
1526 | return; | |
1527 | ||
1528 | gi = container_of(cdev, struct gadget_info, cdev); | |
1529 | spin_lock_irqsave(&gi->spinlock, flags); | |
1530 | cdev = get_gadget_data(gadget); | |
1531 | if (!cdev || gi->unbind) { | |
1532 | spin_unlock_irqrestore(&gi->spinlock, flags); | |
1533 | return; | |
1534 | } | |
1535 | ||
1536 | composite_resume(gadget); | |
1537 | spin_unlock_irqrestore(&gi->spinlock, flags); | |
88af8bbe SAS |
1538 | } |
1539 | ||
1540 | static const struct usb_gadget_driver configfs_driver_template = { | |
1541 | .bind = configfs_composite_bind, | |
1542 | .unbind = configfs_composite_unbind, | |
1543 | ||
1a1c851b PC |
1544 | .setup = configfs_composite_setup, |
1545 | .reset = configfs_composite_disconnect, | |
1546 | .disconnect = configfs_composite_disconnect, | |
88af8bbe | 1547 | |
1a1c851b PC |
1548 | .suspend = configfs_composite_suspend, |
1549 | .resume = configfs_composite_resume, | |
3a571870 | 1550 | |
88af8bbe SAS |
1551 | .max_speed = USB_SPEED_SUPER, |
1552 | .driver = { | |
1553 | .owner = THIS_MODULE, | |
1554 | .name = "configfs-gadget", | |
1555 | }, | |
f1bddbb3 | 1556 | .match_existing_only = 1, |
88af8bbe SAS |
1557 | }; |
1558 | ||
1559 | static struct config_group *gadgets_make( | |
1560 | struct config_group *group, | |
1561 | const char *name) | |
1562 | { | |
1563 | struct gadget_info *gi; | |
1564 | ||
1565 | gi = kzalloc(sizeof(*gi), GFP_KERNEL); | |
1566 | if (!gi) | |
1567 | return ERR_PTR(-ENOMEM); | |
1568 | ||
1ae1602d | 1569 | config_group_init_type_name(&gi->group, name, &gadget_root_type); |
88af8bbe SAS |
1570 | |
1571 | config_group_init_type_name(&gi->functions_group, "functions", | |
1572 | &functions_type); | |
1ae1602d CH |
1573 | configfs_add_default_group(&gi->functions_group, &gi->group); |
1574 | ||
88af8bbe SAS |
1575 | config_group_init_type_name(&gi->configs_group, "configs", |
1576 | &config_desc_type); | |
1ae1602d CH |
1577 | configfs_add_default_group(&gi->configs_group, &gi->group); |
1578 | ||
88af8bbe SAS |
1579 | config_group_init_type_name(&gi->strings_group, "strings", |
1580 | &gadget_strings_strings_type); | |
1ae1602d CH |
1581 | configfs_add_default_group(&gi->strings_group, &gi->group); |
1582 | ||
87213d38 AP |
1583 | config_group_init_type_name(&gi->os_desc_group, "os_desc", |
1584 | &os_desc_type); | |
1ae1602d | 1585 | configfs_add_default_group(&gi->os_desc_group, &gi->group); |
88af8bbe SAS |
1586 | |
1587 | gi->composite.bind = configfs_do_nothing; | |
1588 | gi->composite.unbind = configfs_do_nothing; | |
1589 | gi->composite.suspend = NULL; | |
1590 | gi->composite.resume = NULL; | |
1591 | gi->composite.max_speed = USB_SPEED_SUPER; | |
1592 | ||
093edc2b | 1593 | spin_lock_init(&gi->spinlock); |
88af8bbe SAS |
1594 | mutex_init(&gi->lock); |
1595 | INIT_LIST_HEAD(&gi->string_list); | |
1596 | INIT_LIST_HEAD(&gi->available_func); | |
1597 | ||
1598 | composite_init_dev(&gi->cdev); | |
1599 | gi->cdev.desc.bLength = USB_DT_DEVICE_SIZE; | |
1600 | gi->cdev.desc.bDescriptorType = USB_DT_DEVICE; | |
1601 | gi->cdev.desc.bcdDevice = cpu_to_le16(get_default_bcdDevice()); | |
1602 | ||
1603 | gi->composite.gadget_driver = configfs_driver_template; | |
1604 | ||
1605 | gi->composite.gadget_driver.function = kstrdup(name, GFP_KERNEL); | |
1606 | gi->composite.name = gi->composite.gadget_driver.function; | |
1607 | ||
1608 | if (!gi->composite.gadget_driver.function) | |
1609 | goto err; | |
1610 | ||
88af8bbe SAS |
1611 | return &gi->group; |
1612 | err: | |
1613 | kfree(gi); | |
1614 | return ERR_PTR(-ENOMEM); | |
1615 | } | |
1616 | ||
1617 | static void gadgets_drop(struct config_group *group, struct config_item *item) | |
1618 | { | |
1619 | config_item_put(item); | |
1620 | } | |
1621 | ||
1622 | static struct configfs_group_operations gadgets_ops = { | |
1623 | .make_group = &gadgets_make, | |
1624 | .drop_item = &gadgets_drop, | |
1625 | }; | |
1626 | ||
4ad01412 | 1627 | static const struct config_item_type gadgets_type = { |
88af8bbe SAS |
1628 | .ct_group_ops = &gadgets_ops, |
1629 | .ct_owner = THIS_MODULE, | |
1630 | }; | |
1631 | ||
1632 | static struct configfs_subsystem gadget_subsys = { | |
1633 | .su_group = { | |
1634 | .cg_item = { | |
1635 | .ci_namebuf = "usb_gadget", | |
1636 | .ci_type = &gadgets_type, | |
1637 | }, | |
1638 | }, | |
1639 | .su_mutex = __MUTEX_INITIALIZER(gadget_subsys.su_mutex), | |
1640 | }; | |
1641 | ||
092a4bd0 AP |
1642 | void unregister_gadget_item(struct config_item *item) |
1643 | { | |
1644 | struct gadget_info *gi = to_gadget_info(item); | |
1645 | ||
cee51c33 | 1646 | mutex_lock(&gi->lock); |
092a4bd0 | 1647 | unregister_gadget(gi); |
cee51c33 | 1648 | mutex_unlock(&gi->lock); |
092a4bd0 | 1649 | } |
0700faaf | 1650 | EXPORT_SYMBOL_GPL(unregister_gadget_item); |
092a4bd0 | 1651 | |
88af8bbe SAS |
1652 | static int __init gadget_cfs_init(void) |
1653 | { | |
1654 | int ret; | |
1655 | ||
1656 | config_group_init(&gadget_subsys.su_group); | |
1657 | ||
1658 | ret = configfs_register_subsystem(&gadget_subsys); | |
1659 | return ret; | |
1660 | } | |
1661 | module_init(gadget_cfs_init); | |
1662 | ||
1663 | static void __exit gadget_cfs_exit(void) | |
1664 | { | |
1665 | configfs_unregister_subsystem(&gadget_subsys); | |
1666 | } | |
1667 | module_exit(gadget_cfs_exit); |