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88af8bbe SAS |
1 | #include <linux/configfs.h> |
2 | #include <linux/module.h> | |
3 | #include <linux/slab.h> | |
4 | #include <linux/device.h> | |
87213d38 | 5 | #include <linux/nls.h> |
88af8bbe SAS |
6 | #include <linux/usb/composite.h> |
7 | #include <linux/usb/gadget_configfs.h> | |
0009e99a | 8 | #include "configfs.h" |
da424314 | 9 | #include "u_f.h" |
7419485f | 10 | #include "u_os_desc.h" |
88af8bbe SAS |
11 | |
12 | int check_user_usb_string(const char *name, | |
13 | struct usb_gadget_strings *stringtab_dev) | |
14 | { | |
15 | unsigned primary_lang; | |
16 | unsigned sub_lang; | |
17 | u16 num; | |
18 | int ret; | |
19 | ||
20 | ret = kstrtou16(name, 0, &num); | |
21 | if (ret) | |
22 | return ret; | |
23 | ||
24 | primary_lang = num & 0x3ff; | |
25 | sub_lang = num >> 10; | |
26 | ||
27 | /* simple sanity check for valid langid */ | |
28 | switch (primary_lang) { | |
29 | case 0: | |
30 | case 0x62 ... 0xfe: | |
31 | case 0x100 ... 0x3ff: | |
32 | return -EINVAL; | |
33 | } | |
34 | if (!sub_lang) | |
35 | return -EINVAL; | |
36 | ||
37 | stringtab_dev->language = num; | |
38 | return 0; | |
39 | } | |
40 | ||
41 | #define MAX_NAME_LEN 40 | |
42 | #define MAX_USB_STRING_LANGS 2 | |
43 | ||
44 | struct gadget_info { | |
45 | struct config_group group; | |
46 | struct config_group functions_group; | |
47 | struct config_group configs_group; | |
48 | struct config_group strings_group; | |
87213d38 AP |
49 | struct config_group os_desc_group; |
50 | struct config_group *default_groups[5]; | |
88af8bbe SAS |
51 | |
52 | struct mutex lock; | |
53 | struct usb_gadget_strings *gstrings[MAX_USB_STRING_LANGS + 1]; | |
54 | struct list_head string_list; | |
55 | struct list_head available_func; | |
56 | ||
57 | const char *udc_name; | |
58 | #ifdef CONFIG_USB_OTG | |
59 | struct usb_otg_descriptor otg; | |
60 | #endif | |
61 | struct usb_composite_driver composite; | |
62 | struct usb_composite_dev cdev; | |
87213d38 AP |
63 | bool use_os_desc; |
64 | char b_vendor_code; | |
65 | char qw_sign[OS_STRING_QW_SIGN_LEN]; | |
88af8bbe SAS |
66 | }; |
67 | ||
68 | struct config_usb_cfg { | |
69 | struct config_group group; | |
70 | struct config_group strings_group; | |
71 | struct config_group *default_groups[2]; | |
72 | struct list_head string_list; | |
73 | struct usb_configuration c; | |
74 | struct list_head func_list; | |
75 | struct usb_gadget_strings *gstrings[MAX_USB_STRING_LANGS + 1]; | |
76 | }; | |
77 | ||
78 | struct gadget_strings { | |
79 | struct usb_gadget_strings stringtab_dev; | |
80 | struct usb_string strings[USB_GADGET_FIRST_AVAIL_IDX]; | |
81 | char *manufacturer; | |
82 | char *product; | |
83 | char *serialnumber; | |
84 | ||
85 | struct config_group group; | |
86 | struct list_head list; | |
87 | }; | |
88 | ||
87213d38 AP |
89 | struct os_desc { |
90 | struct config_group group; | |
91 | }; | |
92 | ||
88af8bbe SAS |
93 | struct gadget_config_name { |
94 | struct usb_gadget_strings stringtab_dev; | |
95 | struct usb_string strings; | |
96 | char *configuration; | |
97 | ||
98 | struct config_group group; | |
99 | struct list_head list; | |
100 | }; | |
101 | ||
102 | static int usb_string_copy(const char *s, char **s_copy) | |
103 | { | |
104 | int ret; | |
105 | char *str; | |
106 | char *copy = *s_copy; | |
107 | ret = strlen(s); | |
108 | if (ret > 126) | |
109 | return -EOVERFLOW; | |
110 | ||
111 | str = kstrdup(s, GFP_KERNEL); | |
112 | if (!str) | |
113 | return -ENOMEM; | |
114 | if (str[ret - 1] == '\n') | |
115 | str[ret - 1] = '\0'; | |
116 | kfree(copy); | |
117 | *s_copy = str; | |
118 | return 0; | |
119 | } | |
120 | ||
121 | CONFIGFS_ATTR_STRUCT(gadget_info); | |
122 | CONFIGFS_ATTR_STRUCT(config_usb_cfg); | |
123 | ||
124 | #define GI_DEVICE_DESC_ITEM_ATTR(name) \ | |
125 | static struct gadget_info_attribute gadget_cdev_desc_##name = \ | |
126 | __CONFIGFS_ATTR(name, S_IRUGO | S_IWUSR, \ | |
127 | gadget_dev_desc_##name##_show, \ | |
128 | gadget_dev_desc_##name##_store) | |
129 | ||
130 | #define GI_DEVICE_DESC_SIMPLE_R_u8(__name) \ | |
131 | static ssize_t gadget_dev_desc_##__name##_show(struct gadget_info *gi, \ | |
132 | char *page) \ | |
133 | { \ | |
134 | return sprintf(page, "0x%02x\n", gi->cdev.desc.__name); \ | |
135 | } | |
136 | ||
137 | #define GI_DEVICE_DESC_SIMPLE_R_u16(__name) \ | |
138 | static ssize_t gadget_dev_desc_##__name##_show(struct gadget_info *gi, \ | |
139 | char *page) \ | |
140 | { \ | |
141 | return sprintf(page, "0x%04x\n", le16_to_cpup(&gi->cdev.desc.__name)); \ | |
142 | } | |
143 | ||
144 | ||
145 | #define GI_DEVICE_DESC_SIMPLE_W_u8(_name) \ | |
146 | static ssize_t gadget_dev_desc_##_name##_store(struct gadget_info *gi, \ | |
147 | const char *page, size_t len) \ | |
148 | { \ | |
149 | u8 val; \ | |
150 | int ret; \ | |
151 | ret = kstrtou8(page, 0, &val); \ | |
152 | if (ret) \ | |
153 | return ret; \ | |
154 | gi->cdev.desc._name = val; \ | |
155 | return len; \ | |
156 | } | |
157 | ||
158 | #define GI_DEVICE_DESC_SIMPLE_W_u16(_name) \ | |
159 | static ssize_t gadget_dev_desc_##_name##_store(struct gadget_info *gi, \ | |
160 | const char *page, size_t len) \ | |
161 | { \ | |
162 | u16 val; \ | |
163 | int ret; \ | |
164 | ret = kstrtou16(page, 0, &val); \ | |
165 | if (ret) \ | |
166 | return ret; \ | |
167 | gi->cdev.desc._name = cpu_to_le16p(&val); \ | |
168 | return len; \ | |
169 | } | |
170 | ||
171 | #define GI_DEVICE_DESC_SIMPLE_RW(_name, _type) \ | |
172 | GI_DEVICE_DESC_SIMPLE_R_##_type(_name) \ | |
173 | GI_DEVICE_DESC_SIMPLE_W_##_type(_name) | |
174 | ||
175 | GI_DEVICE_DESC_SIMPLE_R_u16(bcdUSB); | |
176 | GI_DEVICE_DESC_SIMPLE_RW(bDeviceClass, u8); | |
177 | GI_DEVICE_DESC_SIMPLE_RW(bDeviceSubClass, u8); | |
178 | GI_DEVICE_DESC_SIMPLE_RW(bDeviceProtocol, u8); | |
179 | GI_DEVICE_DESC_SIMPLE_RW(bMaxPacketSize0, u8); | |
180 | GI_DEVICE_DESC_SIMPLE_RW(idVendor, u16); | |
181 | GI_DEVICE_DESC_SIMPLE_RW(idProduct, u16); | |
182 | GI_DEVICE_DESC_SIMPLE_R_u16(bcdDevice); | |
183 | ||
184 | static ssize_t is_valid_bcd(u16 bcd_val) | |
185 | { | |
186 | if ((bcd_val & 0xf) > 9) | |
187 | return -EINVAL; | |
188 | if (((bcd_val >> 4) & 0xf) > 9) | |
189 | return -EINVAL; | |
190 | if (((bcd_val >> 8) & 0xf) > 9) | |
191 | return -EINVAL; | |
192 | if (((bcd_val >> 12) & 0xf) > 9) | |
193 | return -EINVAL; | |
194 | return 0; | |
195 | } | |
196 | ||
197 | static ssize_t gadget_dev_desc_bcdDevice_store(struct gadget_info *gi, | |
198 | const char *page, size_t len) | |
199 | { | |
200 | u16 bcdDevice; | |
201 | int ret; | |
202 | ||
203 | ret = kstrtou16(page, 0, &bcdDevice); | |
204 | if (ret) | |
205 | return ret; | |
206 | ret = is_valid_bcd(bcdDevice); | |
207 | if (ret) | |
208 | return ret; | |
209 | ||
210 | gi->cdev.desc.bcdDevice = cpu_to_le16(bcdDevice); | |
211 | return len; | |
212 | } | |
213 | ||
214 | static ssize_t gadget_dev_desc_bcdUSB_store(struct gadget_info *gi, | |
215 | const char *page, size_t len) | |
216 | { | |
217 | u16 bcdUSB; | |
218 | int ret; | |
219 | ||
220 | ret = kstrtou16(page, 0, &bcdUSB); | |
221 | if (ret) | |
222 | return ret; | |
223 | ret = is_valid_bcd(bcdUSB); | |
224 | if (ret) | |
225 | return ret; | |
226 | ||
227 | gi->cdev.desc.bcdUSB = cpu_to_le16(bcdUSB); | |
228 | return len; | |
229 | } | |
230 | ||
231 | static ssize_t gadget_dev_desc_UDC_show(struct gadget_info *gi, char *page) | |
232 | { | |
233 | return sprintf(page, "%s\n", gi->udc_name ?: ""); | |
234 | } | |
235 | ||
236 | static int unregister_gadget(struct gadget_info *gi) | |
237 | { | |
238 | int ret; | |
239 | ||
240 | if (!gi->udc_name) | |
241 | return -ENODEV; | |
242 | ||
243 | ret = usb_gadget_unregister_driver(&gi->composite.gadget_driver); | |
244 | if (ret) | |
245 | return ret; | |
246 | kfree(gi->udc_name); | |
247 | gi->udc_name = NULL; | |
248 | return 0; | |
249 | } | |
250 | ||
251 | static ssize_t gadget_dev_desc_UDC_store(struct gadget_info *gi, | |
252 | const char *page, size_t len) | |
253 | { | |
254 | char *name; | |
255 | int ret; | |
256 | ||
257 | name = kstrdup(page, GFP_KERNEL); | |
258 | if (!name) | |
259 | return -ENOMEM; | |
260 | if (name[len - 1] == '\n') | |
261 | name[len - 1] = '\0'; | |
262 | ||
263 | mutex_lock(&gi->lock); | |
264 | ||
265 | if (!strlen(name)) { | |
266 | ret = unregister_gadget(gi); | |
267 | if (ret) | |
268 | goto err; | |
269 | } else { | |
270 | if (gi->udc_name) { | |
271 | ret = -EBUSY; | |
272 | goto err; | |
273 | } | |
274 | ret = udc_attach_driver(name, &gi->composite.gadget_driver); | |
275 | if (ret) | |
276 | goto err; | |
277 | gi->udc_name = name; | |
278 | } | |
279 | mutex_unlock(&gi->lock); | |
280 | return len; | |
281 | err: | |
282 | kfree(name); | |
283 | mutex_unlock(&gi->lock); | |
284 | return ret; | |
285 | } | |
286 | ||
287 | GI_DEVICE_DESC_ITEM_ATTR(bDeviceClass); | |
288 | GI_DEVICE_DESC_ITEM_ATTR(bDeviceSubClass); | |
289 | GI_DEVICE_DESC_ITEM_ATTR(bDeviceProtocol); | |
290 | GI_DEVICE_DESC_ITEM_ATTR(bMaxPacketSize0); | |
291 | GI_DEVICE_DESC_ITEM_ATTR(idVendor); | |
292 | GI_DEVICE_DESC_ITEM_ATTR(idProduct); | |
293 | GI_DEVICE_DESC_ITEM_ATTR(bcdDevice); | |
294 | GI_DEVICE_DESC_ITEM_ATTR(bcdUSB); | |
295 | GI_DEVICE_DESC_ITEM_ATTR(UDC); | |
296 | ||
297 | static struct configfs_attribute *gadget_root_attrs[] = { | |
298 | &gadget_cdev_desc_bDeviceClass.attr, | |
299 | &gadget_cdev_desc_bDeviceSubClass.attr, | |
300 | &gadget_cdev_desc_bDeviceProtocol.attr, | |
301 | &gadget_cdev_desc_bMaxPacketSize0.attr, | |
302 | &gadget_cdev_desc_idVendor.attr, | |
303 | &gadget_cdev_desc_idProduct.attr, | |
304 | &gadget_cdev_desc_bcdDevice.attr, | |
305 | &gadget_cdev_desc_bcdUSB.attr, | |
306 | &gadget_cdev_desc_UDC.attr, | |
307 | NULL, | |
308 | }; | |
309 | ||
310 | static inline struct gadget_info *to_gadget_info(struct config_item *item) | |
311 | { | |
312 | return container_of(to_config_group(item), struct gadget_info, group); | |
313 | } | |
314 | ||
315 | static inline struct gadget_strings *to_gadget_strings(struct config_item *item) | |
316 | { | |
317 | return container_of(to_config_group(item), struct gadget_strings, | |
318 | group); | |
319 | } | |
320 | ||
321 | static inline struct gadget_config_name *to_gadget_config_name( | |
322 | struct config_item *item) | |
323 | { | |
324 | return container_of(to_config_group(item), struct gadget_config_name, | |
325 | group); | |
326 | } | |
327 | ||
328 | static inline struct config_usb_cfg *to_config_usb_cfg(struct config_item *item) | |
329 | { | |
330 | return container_of(to_config_group(item), struct config_usb_cfg, | |
331 | group); | |
332 | } | |
333 | ||
334 | static inline struct usb_function_instance *to_usb_function_instance( | |
335 | struct config_item *item) | |
336 | { | |
337 | return container_of(to_config_group(item), | |
338 | struct usb_function_instance, group); | |
339 | } | |
340 | ||
341 | static void gadget_info_attr_release(struct config_item *item) | |
342 | { | |
343 | struct gadget_info *gi = to_gadget_info(item); | |
344 | ||
345 | WARN_ON(!list_empty(&gi->cdev.configs)); | |
346 | WARN_ON(!list_empty(&gi->string_list)); | |
347 | WARN_ON(!list_empty(&gi->available_func)); | |
348 | kfree(gi->composite.gadget_driver.function); | |
349 | kfree(gi); | |
350 | } | |
351 | ||
352 | CONFIGFS_ATTR_OPS(gadget_info); | |
353 | ||
354 | static struct configfs_item_operations gadget_root_item_ops = { | |
355 | .release = gadget_info_attr_release, | |
356 | .show_attribute = gadget_info_attr_show, | |
357 | .store_attribute = gadget_info_attr_store, | |
358 | }; | |
359 | ||
360 | static void gadget_config_attr_release(struct config_item *item) | |
361 | { | |
362 | struct config_usb_cfg *cfg = to_config_usb_cfg(item); | |
363 | ||
364 | WARN_ON(!list_empty(&cfg->c.functions)); | |
365 | list_del(&cfg->c.list); | |
366 | kfree(cfg->c.label); | |
367 | kfree(cfg); | |
368 | } | |
369 | ||
370 | static int config_usb_cfg_link( | |
371 | struct config_item *usb_cfg_ci, | |
372 | struct config_item *usb_func_ci) | |
373 | { | |
374 | struct config_usb_cfg *cfg = to_config_usb_cfg(usb_cfg_ci); | |
375 | struct usb_composite_dev *cdev = cfg->c.cdev; | |
376 | struct gadget_info *gi = container_of(cdev, struct gadget_info, cdev); | |
377 | ||
378 | struct config_group *group = to_config_group(usb_func_ci); | |
379 | struct usb_function_instance *fi = container_of(group, | |
380 | struct usb_function_instance, group); | |
381 | struct usb_function_instance *a_fi; | |
382 | struct usb_function *f; | |
383 | int ret; | |
384 | ||
385 | mutex_lock(&gi->lock); | |
386 | /* | |
387 | * Make sure this function is from within our _this_ gadget and not | |
388 | * from another gadget or a random directory. | |
389 | * Also a function instance can only be linked once. | |
390 | */ | |
391 | list_for_each_entry(a_fi, &gi->available_func, cfs_list) { | |
392 | if (a_fi == fi) | |
393 | break; | |
394 | } | |
395 | if (a_fi != fi) { | |
396 | ret = -EINVAL; | |
397 | goto out; | |
398 | } | |
399 | ||
400 | list_for_each_entry(f, &cfg->func_list, list) { | |
401 | if (f->fi == fi) { | |
402 | ret = -EEXIST; | |
403 | goto out; | |
404 | } | |
405 | } | |
406 | ||
407 | f = usb_get_function(fi); | |
408 | if (IS_ERR(f)) { | |
409 | ret = PTR_ERR(f); | |
410 | goto out; | |
411 | } | |
412 | ||
413 | /* stash the function until we bind it to the gadget */ | |
414 | list_add_tail(&f->list, &cfg->func_list); | |
415 | ret = 0; | |
416 | out: | |
417 | mutex_unlock(&gi->lock); | |
418 | return ret; | |
419 | } | |
420 | ||
421 | static int config_usb_cfg_unlink( | |
422 | struct config_item *usb_cfg_ci, | |
423 | struct config_item *usb_func_ci) | |
424 | { | |
425 | struct config_usb_cfg *cfg = to_config_usb_cfg(usb_cfg_ci); | |
426 | struct usb_composite_dev *cdev = cfg->c.cdev; | |
427 | struct gadget_info *gi = container_of(cdev, struct gadget_info, cdev); | |
428 | ||
429 | struct config_group *group = to_config_group(usb_func_ci); | |
430 | struct usb_function_instance *fi = container_of(group, | |
431 | struct usb_function_instance, group); | |
432 | struct usb_function *f; | |
433 | ||
434 | /* | |
435 | * ideally I would like to forbid to unlink functions while a gadget is | |
436 | * bound to an UDC. Since this isn't possible at the moment, we simply | |
437 | * force an unbind, the function is available here and then we can | |
438 | * remove the function. | |
439 | */ | |
440 | mutex_lock(&gi->lock); | |
441 | if (gi->udc_name) | |
442 | unregister_gadget(gi); | |
443 | WARN_ON(gi->udc_name); | |
444 | ||
445 | list_for_each_entry(f, &cfg->func_list, list) { | |
446 | if (f->fi == fi) { | |
447 | list_del(&f->list); | |
448 | usb_put_function(f); | |
449 | mutex_unlock(&gi->lock); | |
450 | return 0; | |
451 | } | |
452 | } | |
453 | mutex_unlock(&gi->lock); | |
75bfe23a | 454 | WARN(1, "Unable to locate function to unbind\n"); |
88af8bbe SAS |
455 | return 0; |
456 | } | |
457 | ||
458 | CONFIGFS_ATTR_OPS(config_usb_cfg); | |
459 | ||
460 | static struct configfs_item_operations gadget_config_item_ops = { | |
461 | .release = gadget_config_attr_release, | |
462 | .show_attribute = config_usb_cfg_attr_show, | |
463 | .store_attribute = config_usb_cfg_attr_store, | |
464 | .allow_link = config_usb_cfg_link, | |
465 | .drop_link = config_usb_cfg_unlink, | |
466 | }; | |
467 | ||
468 | ||
469 | static ssize_t gadget_config_desc_MaxPower_show(struct config_usb_cfg *cfg, | |
470 | char *page) | |
471 | { | |
472 | return sprintf(page, "%u\n", cfg->c.MaxPower); | |
473 | } | |
474 | ||
475 | static ssize_t gadget_config_desc_MaxPower_store(struct config_usb_cfg *cfg, | |
476 | const char *page, size_t len) | |
477 | { | |
478 | u16 val; | |
479 | int ret; | |
480 | ret = kstrtou16(page, 0, &val); | |
481 | if (ret) | |
482 | return ret; | |
483 | if (DIV_ROUND_UP(val, 8) > 0xff) | |
484 | return -ERANGE; | |
485 | cfg->c.MaxPower = val; | |
486 | return len; | |
487 | } | |
488 | ||
489 | static ssize_t gadget_config_desc_bmAttributes_show(struct config_usb_cfg *cfg, | |
490 | char *page) | |
491 | { | |
492 | return sprintf(page, "0x%02x\n", cfg->c.bmAttributes); | |
493 | } | |
494 | ||
495 | static ssize_t gadget_config_desc_bmAttributes_store(struct config_usb_cfg *cfg, | |
496 | const char *page, size_t len) | |
497 | { | |
498 | u8 val; | |
499 | int ret; | |
500 | ret = kstrtou8(page, 0, &val); | |
501 | if (ret) | |
502 | return ret; | |
503 | if (!(val & USB_CONFIG_ATT_ONE)) | |
504 | return -EINVAL; | |
505 | if (val & ~(USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER | | |
506 | USB_CONFIG_ATT_WAKEUP)) | |
507 | return -EINVAL; | |
508 | cfg->c.bmAttributes = val; | |
509 | return len; | |
510 | } | |
511 | ||
512 | #define CFG_CONFIG_DESC_ITEM_ATTR(name) \ | |
513 | static struct config_usb_cfg_attribute gadget_usb_cfg_##name = \ | |
514 | __CONFIGFS_ATTR(name, S_IRUGO | S_IWUSR, \ | |
515 | gadget_config_desc_##name##_show, \ | |
516 | gadget_config_desc_##name##_store) | |
517 | ||
518 | CFG_CONFIG_DESC_ITEM_ATTR(MaxPower); | |
519 | CFG_CONFIG_DESC_ITEM_ATTR(bmAttributes); | |
520 | ||
521 | static struct configfs_attribute *gadget_config_attrs[] = { | |
522 | &gadget_usb_cfg_MaxPower.attr, | |
523 | &gadget_usb_cfg_bmAttributes.attr, | |
524 | NULL, | |
525 | }; | |
526 | ||
527 | static struct config_item_type gadget_config_type = { | |
528 | .ct_item_ops = &gadget_config_item_ops, | |
529 | .ct_attrs = gadget_config_attrs, | |
530 | .ct_owner = THIS_MODULE, | |
531 | }; | |
532 | ||
533 | static struct config_item_type gadget_root_type = { | |
534 | .ct_item_ops = &gadget_root_item_ops, | |
535 | .ct_attrs = gadget_root_attrs, | |
536 | .ct_owner = THIS_MODULE, | |
537 | }; | |
538 | ||
539 | static void composite_init_dev(struct usb_composite_dev *cdev) | |
540 | { | |
541 | spin_lock_init(&cdev->lock); | |
542 | INIT_LIST_HEAD(&cdev->configs); | |
543 | INIT_LIST_HEAD(&cdev->gstrings); | |
544 | } | |
545 | ||
546 | static struct config_group *function_make( | |
547 | struct config_group *group, | |
548 | const char *name) | |
549 | { | |
550 | struct gadget_info *gi; | |
551 | struct usb_function_instance *fi; | |
552 | char buf[MAX_NAME_LEN]; | |
553 | char *func_name; | |
554 | char *instance_name; | |
555 | int ret; | |
556 | ||
557 | ret = snprintf(buf, MAX_NAME_LEN, "%s", name); | |
558 | if (ret >= MAX_NAME_LEN) | |
559 | return ERR_PTR(-ENAMETOOLONG); | |
560 | ||
561 | func_name = buf; | |
562 | instance_name = strchr(func_name, '.'); | |
563 | if (!instance_name) { | |
564 | pr_err("Unable to locate . in FUNC.INSTANCE\n"); | |
565 | return ERR_PTR(-EINVAL); | |
566 | } | |
567 | *instance_name = '\0'; | |
568 | instance_name++; | |
569 | ||
570 | fi = usb_get_function_instance(func_name); | |
571 | if (IS_ERR(fi)) | |
a3469411 | 572 | return ERR_CAST(fi); |
88af8bbe SAS |
573 | |
574 | ret = config_item_set_name(&fi->group.cg_item, name); | |
575 | if (ret) { | |
576 | usb_put_function_instance(fi); | |
577 | return ERR_PTR(ret); | |
578 | } | |
1933861d AP |
579 | if (fi->set_inst_name) { |
580 | ret = fi->set_inst_name(fi, instance_name); | |
581 | if (ret) { | |
582 | usb_put_function_instance(fi); | |
583 | return ERR_PTR(ret); | |
584 | } | |
585 | } | |
88af8bbe SAS |
586 | |
587 | gi = container_of(group, struct gadget_info, functions_group); | |
588 | ||
589 | mutex_lock(&gi->lock); | |
590 | list_add_tail(&fi->cfs_list, &gi->available_func); | |
591 | mutex_unlock(&gi->lock); | |
592 | return &fi->group; | |
593 | } | |
594 | ||
595 | static void function_drop( | |
596 | struct config_group *group, | |
597 | struct config_item *item) | |
598 | { | |
599 | struct usb_function_instance *fi = to_usb_function_instance(item); | |
600 | struct gadget_info *gi; | |
601 | ||
602 | gi = container_of(group, struct gadget_info, functions_group); | |
603 | ||
604 | mutex_lock(&gi->lock); | |
605 | list_del(&fi->cfs_list); | |
606 | mutex_unlock(&gi->lock); | |
607 | config_item_put(item); | |
608 | } | |
609 | ||
610 | static struct configfs_group_operations functions_ops = { | |
611 | .make_group = &function_make, | |
612 | .drop_item = &function_drop, | |
613 | }; | |
614 | ||
615 | static struct config_item_type functions_type = { | |
616 | .ct_group_ops = &functions_ops, | |
617 | .ct_owner = THIS_MODULE, | |
618 | }; | |
619 | ||
620 | CONFIGFS_ATTR_STRUCT(gadget_config_name); | |
621 | GS_STRINGS_RW(gadget_config_name, configuration); | |
622 | ||
623 | static struct configfs_attribute *gadget_config_name_langid_attrs[] = { | |
624 | &gadget_config_name_configuration.attr, | |
625 | NULL, | |
626 | }; | |
627 | ||
628 | static void gadget_config_name_attr_release(struct config_item *item) | |
629 | { | |
630 | struct gadget_config_name *cn = to_gadget_config_name(item); | |
631 | ||
632 | kfree(cn->configuration); | |
633 | ||
634 | list_del(&cn->list); | |
635 | kfree(cn); | |
636 | } | |
637 | ||
638 | USB_CONFIG_STRING_RW_OPS(gadget_config_name); | |
639 | USB_CONFIG_STRINGS_LANG(gadget_config_name, config_usb_cfg); | |
640 | ||
641 | static struct config_group *config_desc_make( | |
642 | struct config_group *group, | |
643 | const char *name) | |
644 | { | |
645 | struct gadget_info *gi; | |
646 | struct config_usb_cfg *cfg; | |
647 | char buf[MAX_NAME_LEN]; | |
648 | char *num_str; | |
649 | u8 num; | |
650 | int ret; | |
651 | ||
652 | gi = container_of(group, struct gadget_info, configs_group); | |
653 | ret = snprintf(buf, MAX_NAME_LEN, "%s", name); | |
654 | if (ret >= MAX_NAME_LEN) | |
655 | return ERR_PTR(-ENAMETOOLONG); | |
656 | ||
657 | num_str = strchr(buf, '.'); | |
658 | if (!num_str) { | |
659 | pr_err("Unable to locate . in name.bConfigurationValue\n"); | |
660 | return ERR_PTR(-EINVAL); | |
661 | } | |
662 | ||
663 | *num_str = '\0'; | |
664 | num_str++; | |
665 | ||
666 | if (!strlen(buf)) | |
667 | return ERR_PTR(-EINVAL); | |
668 | ||
669 | ret = kstrtou8(num_str, 0, &num); | |
670 | if (ret) | |
671 | return ERR_PTR(ret); | |
672 | ||
673 | cfg = kzalloc(sizeof(*cfg), GFP_KERNEL); | |
674 | if (!cfg) | |
675 | return ERR_PTR(-ENOMEM); | |
676 | cfg->c.label = kstrdup(buf, GFP_KERNEL); | |
677 | if (!cfg->c.label) { | |
678 | ret = -ENOMEM; | |
679 | goto err; | |
680 | } | |
681 | cfg->c.bConfigurationValue = num; | |
682 | cfg->c.MaxPower = CONFIG_USB_GADGET_VBUS_DRAW; | |
683 | cfg->c.bmAttributes = USB_CONFIG_ATT_ONE; | |
684 | INIT_LIST_HEAD(&cfg->string_list); | |
685 | INIT_LIST_HEAD(&cfg->func_list); | |
686 | ||
687 | cfg->group.default_groups = cfg->default_groups; | |
688 | cfg->default_groups[0] = &cfg->strings_group; | |
689 | ||
690 | config_group_init_type_name(&cfg->group, name, | |
691 | &gadget_config_type); | |
692 | config_group_init_type_name(&cfg->strings_group, "strings", | |
693 | &gadget_config_name_strings_type); | |
694 | ||
695 | ret = usb_add_config_only(&gi->cdev, &cfg->c); | |
696 | if (ret) | |
697 | goto err; | |
698 | ||
699 | return &cfg->group; | |
700 | err: | |
701 | kfree(cfg->c.label); | |
702 | kfree(cfg); | |
703 | return ERR_PTR(ret); | |
704 | } | |
705 | ||
706 | static void config_desc_drop( | |
707 | struct config_group *group, | |
708 | struct config_item *item) | |
709 | { | |
710 | config_item_put(item); | |
711 | } | |
712 | ||
713 | static struct configfs_group_operations config_desc_ops = { | |
714 | .make_group = &config_desc_make, | |
715 | .drop_item = &config_desc_drop, | |
716 | }; | |
717 | ||
718 | static struct config_item_type config_desc_type = { | |
719 | .ct_group_ops = &config_desc_ops, | |
720 | .ct_owner = THIS_MODULE, | |
721 | }; | |
722 | ||
723 | CONFIGFS_ATTR_STRUCT(gadget_strings); | |
724 | GS_STRINGS_RW(gadget_strings, manufacturer); | |
725 | GS_STRINGS_RW(gadget_strings, product); | |
726 | GS_STRINGS_RW(gadget_strings, serialnumber); | |
727 | ||
728 | static struct configfs_attribute *gadget_strings_langid_attrs[] = { | |
729 | &gadget_strings_manufacturer.attr, | |
730 | &gadget_strings_product.attr, | |
731 | &gadget_strings_serialnumber.attr, | |
732 | NULL, | |
733 | }; | |
734 | ||
735 | static void gadget_strings_attr_release(struct config_item *item) | |
736 | { | |
737 | struct gadget_strings *gs = to_gadget_strings(item); | |
738 | ||
739 | kfree(gs->manufacturer); | |
740 | kfree(gs->product); | |
741 | kfree(gs->serialnumber); | |
742 | ||
743 | list_del(&gs->list); | |
744 | kfree(gs); | |
745 | } | |
746 | ||
747 | USB_CONFIG_STRING_RW_OPS(gadget_strings); | |
748 | USB_CONFIG_STRINGS_LANG(gadget_strings, gadget_info); | |
749 | ||
87213d38 AP |
750 | static inline struct os_desc *to_os_desc(struct config_item *item) |
751 | { | |
752 | return container_of(to_config_group(item), struct os_desc, group); | |
753 | } | |
754 | ||
755 | CONFIGFS_ATTR_STRUCT(os_desc); | |
756 | CONFIGFS_ATTR_OPS(os_desc); | |
757 | ||
758 | static ssize_t os_desc_use_show(struct os_desc *os_desc, char *page) | |
759 | { | |
760 | struct gadget_info *gi; | |
761 | ||
762 | gi = to_gadget_info(os_desc->group.cg_item.ci_parent); | |
763 | ||
764 | return sprintf(page, "%d", gi->use_os_desc); | |
765 | } | |
766 | ||
767 | static ssize_t os_desc_use_store(struct os_desc *os_desc, const char *page, | |
768 | size_t len) | |
769 | { | |
770 | struct gadget_info *gi; | |
771 | int ret; | |
772 | bool use; | |
773 | ||
774 | gi = to_gadget_info(os_desc->group.cg_item.ci_parent); | |
775 | ||
776 | mutex_lock(&gi->lock); | |
777 | ret = strtobool(page, &use); | |
778 | if (!ret) { | |
779 | gi->use_os_desc = use; | |
780 | ret = len; | |
781 | } | |
782 | mutex_unlock(&gi->lock); | |
783 | ||
784 | return ret; | |
785 | } | |
786 | ||
787 | static struct os_desc_attribute os_desc_use = | |
788 | __CONFIGFS_ATTR(use, S_IRUGO | S_IWUSR, | |
789 | os_desc_use_show, | |
790 | os_desc_use_store); | |
791 | ||
792 | static ssize_t os_desc_b_vendor_code_show(struct os_desc *os_desc, char *page) | |
793 | { | |
794 | struct gadget_info *gi; | |
795 | ||
796 | gi = to_gadget_info(os_desc->group.cg_item.ci_parent); | |
797 | ||
798 | return sprintf(page, "%d", gi->b_vendor_code); | |
799 | } | |
800 | ||
801 | static ssize_t os_desc_b_vendor_code_store(struct os_desc *os_desc, | |
802 | const char *page, size_t len) | |
803 | { | |
804 | struct gadget_info *gi; | |
805 | int ret; | |
806 | u8 b_vendor_code; | |
807 | ||
808 | gi = to_gadget_info(os_desc->group.cg_item.ci_parent); | |
809 | ||
810 | mutex_lock(&gi->lock); | |
811 | ret = kstrtou8(page, 0, &b_vendor_code); | |
812 | if (!ret) { | |
813 | gi->b_vendor_code = b_vendor_code; | |
814 | ret = len; | |
815 | } | |
816 | mutex_unlock(&gi->lock); | |
817 | ||
818 | return ret; | |
819 | } | |
820 | ||
821 | static struct os_desc_attribute os_desc_b_vendor_code = | |
822 | __CONFIGFS_ATTR(b_vendor_code, S_IRUGO | S_IWUSR, | |
823 | os_desc_b_vendor_code_show, | |
824 | os_desc_b_vendor_code_store); | |
825 | ||
826 | static ssize_t os_desc_qw_sign_show(struct os_desc *os_desc, char *page) | |
827 | { | |
828 | struct gadget_info *gi; | |
829 | ||
830 | gi = to_gadget_info(os_desc->group.cg_item.ci_parent); | |
831 | ||
832 | memcpy(page, gi->qw_sign, OS_STRING_QW_SIGN_LEN); | |
833 | ||
834 | return OS_STRING_QW_SIGN_LEN; | |
835 | } | |
836 | ||
837 | static ssize_t os_desc_qw_sign_store(struct os_desc *os_desc, const char *page, | |
838 | size_t len) | |
839 | { | |
840 | struct gadget_info *gi; | |
841 | int res, l; | |
842 | ||
843 | gi = to_gadget_info(os_desc->group.cg_item.ci_parent); | |
844 | l = min((int)len, OS_STRING_QW_SIGN_LEN >> 1); | |
845 | if (page[l - 1] == '\n') | |
846 | --l; | |
847 | ||
848 | mutex_lock(&gi->lock); | |
849 | res = utf8s_to_utf16s(page, l, | |
850 | UTF16_LITTLE_ENDIAN, (wchar_t *) gi->qw_sign, | |
851 | OS_STRING_QW_SIGN_LEN); | |
852 | if (res > 0) | |
853 | res = len; | |
854 | mutex_unlock(&gi->lock); | |
855 | ||
856 | return res; | |
857 | } | |
858 | ||
859 | static struct os_desc_attribute os_desc_qw_sign = | |
860 | __CONFIGFS_ATTR(qw_sign, S_IRUGO | S_IWUSR, | |
861 | os_desc_qw_sign_show, | |
862 | os_desc_qw_sign_store); | |
863 | ||
864 | static struct configfs_attribute *os_desc_attrs[] = { | |
865 | &os_desc_use.attr, | |
866 | &os_desc_b_vendor_code.attr, | |
867 | &os_desc_qw_sign.attr, | |
868 | NULL, | |
869 | }; | |
870 | ||
871 | static void os_desc_attr_release(struct config_item *item) | |
872 | { | |
873 | struct os_desc *os_desc = to_os_desc(item); | |
874 | kfree(os_desc); | |
875 | } | |
876 | ||
da424314 AP |
877 | static int os_desc_link(struct config_item *os_desc_ci, |
878 | struct config_item *usb_cfg_ci) | |
879 | { | |
880 | struct gadget_info *gi = container_of(to_config_group(os_desc_ci), | |
881 | struct gadget_info, os_desc_group); | |
882 | struct usb_composite_dev *cdev = &gi->cdev; | |
883 | struct config_usb_cfg *c_target = | |
884 | container_of(to_config_group(usb_cfg_ci), | |
885 | struct config_usb_cfg, group); | |
886 | struct usb_configuration *c; | |
887 | int ret; | |
888 | ||
889 | mutex_lock(&gi->lock); | |
890 | list_for_each_entry(c, &cdev->configs, list) { | |
891 | if (c == &c_target->c) | |
892 | break; | |
893 | } | |
894 | if (c != &c_target->c) { | |
895 | ret = -EINVAL; | |
896 | goto out; | |
897 | } | |
898 | ||
899 | if (cdev->os_desc_config) { | |
900 | ret = -EBUSY; | |
901 | goto out; | |
902 | } | |
903 | ||
904 | cdev->os_desc_config = &c_target->c; | |
905 | ret = 0; | |
906 | ||
907 | out: | |
908 | mutex_unlock(&gi->lock); | |
909 | return ret; | |
910 | } | |
911 | ||
912 | static int os_desc_unlink(struct config_item *os_desc_ci, | |
913 | struct config_item *usb_cfg_ci) | |
914 | { | |
915 | struct gadget_info *gi = container_of(to_config_group(os_desc_ci), | |
916 | struct gadget_info, os_desc_group); | |
917 | struct usb_composite_dev *cdev = &gi->cdev; | |
918 | ||
919 | mutex_lock(&gi->lock); | |
920 | if (gi->udc_name) | |
921 | unregister_gadget(gi); | |
922 | cdev->os_desc_config = NULL; | |
923 | WARN_ON(gi->udc_name); | |
924 | mutex_unlock(&gi->lock); | |
925 | return 0; | |
926 | } | |
927 | ||
87213d38 AP |
928 | static struct configfs_item_operations os_desc_ops = { |
929 | .release = os_desc_attr_release, | |
930 | .show_attribute = os_desc_attr_show, | |
931 | .store_attribute = os_desc_attr_store, | |
da424314 AP |
932 | .allow_link = os_desc_link, |
933 | .drop_link = os_desc_unlink, | |
87213d38 AP |
934 | }; |
935 | ||
936 | static struct config_item_type os_desc_type = { | |
937 | .ct_item_ops = &os_desc_ops, | |
938 | .ct_attrs = os_desc_attrs, | |
939 | .ct_owner = THIS_MODULE, | |
940 | }; | |
941 | ||
da424314 AP |
942 | CONFIGFS_ATTR_STRUCT(usb_os_desc); |
943 | CONFIGFS_ATTR_OPS(usb_os_desc); | |
944 | ||
7419485f AP |
945 | |
946 | static inline struct usb_os_desc_ext_prop | |
947 | *to_usb_os_desc_ext_prop(struct config_item *item) | |
948 | { | |
949 | return container_of(item, struct usb_os_desc_ext_prop, item); | |
950 | } | |
951 | ||
952 | CONFIGFS_ATTR_STRUCT(usb_os_desc_ext_prop); | |
953 | CONFIGFS_ATTR_OPS(usb_os_desc_ext_prop); | |
954 | ||
955 | static ssize_t ext_prop_type_show(struct usb_os_desc_ext_prop *ext_prop, | |
956 | char *page) | |
957 | { | |
958 | return sprintf(page, "%d", ext_prop->type); | |
959 | } | |
960 | ||
961 | static ssize_t ext_prop_type_store(struct usb_os_desc_ext_prop *ext_prop, | |
962 | const char *page, size_t len) | |
963 | { | |
964 | struct usb_os_desc *desc = to_usb_os_desc(ext_prop->item.ci_parent); | |
965 | u8 type; | |
966 | int ret; | |
967 | ||
968 | if (desc->opts_mutex) | |
969 | mutex_lock(desc->opts_mutex); | |
970 | ret = kstrtou8(page, 0, &type); | |
971 | if (ret) | |
972 | goto end; | |
973 | if (type < USB_EXT_PROP_UNICODE || type > USB_EXT_PROP_UNICODE_MULTI) { | |
974 | ret = -EINVAL; | |
975 | goto end; | |
976 | } | |
977 | ||
978 | if ((ext_prop->type == USB_EXT_PROP_BINARY || | |
979 | ext_prop->type == USB_EXT_PROP_LE32 || | |
980 | ext_prop->type == USB_EXT_PROP_BE32) && | |
981 | (type == USB_EXT_PROP_UNICODE || | |
982 | type == USB_EXT_PROP_UNICODE_ENV || | |
983 | type == USB_EXT_PROP_UNICODE_LINK)) | |
984 | ext_prop->data_len <<= 1; | |
985 | else if ((ext_prop->type == USB_EXT_PROP_UNICODE || | |
986 | ext_prop->type == USB_EXT_PROP_UNICODE_ENV || | |
987 | ext_prop->type == USB_EXT_PROP_UNICODE_LINK) && | |
988 | (type == USB_EXT_PROP_BINARY || | |
989 | type == USB_EXT_PROP_LE32 || | |
990 | type == USB_EXT_PROP_BE32)) | |
991 | ext_prop->data_len >>= 1; | |
992 | ext_prop->type = type; | |
993 | ret = len; | |
994 | ||
995 | end: | |
996 | if (desc->opts_mutex) | |
997 | mutex_unlock(desc->opts_mutex); | |
998 | return ret; | |
999 | } | |
1000 | ||
1001 | static ssize_t ext_prop_data_show(struct usb_os_desc_ext_prop *ext_prop, | |
1002 | char *page) | |
1003 | { | |
1004 | int len = ext_prop->data_len; | |
1005 | ||
1006 | if (ext_prop->type == USB_EXT_PROP_UNICODE || | |
1007 | ext_prop->type == USB_EXT_PROP_UNICODE_ENV || | |
1008 | ext_prop->type == USB_EXT_PROP_UNICODE_LINK) | |
1009 | len >>= 1; | |
1010 | memcpy(page, ext_prop->data, len); | |
1011 | ||
1012 | return len; | |
1013 | } | |
1014 | ||
1015 | static ssize_t ext_prop_data_store(struct usb_os_desc_ext_prop *ext_prop, | |
1016 | const char *page, size_t len) | |
1017 | { | |
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; | |
1024 | new_data = kzalloc(len, GFP_KERNEL); | |
1025 | if (!new_data) | |
1026 | return -ENOMEM; | |
1027 | ||
1028 | memcpy(new_data, page, len); | |
1029 | ||
1030 | if (desc->opts_mutex) | |
1031 | mutex_lock(desc->opts_mutex); | |
1032 | kfree(ext_prop->data); | |
1033 | ext_prop->data = new_data; | |
1034 | desc->ext_prop_len -= ext_prop->data_len; | |
1035 | ext_prop->data_len = len; | |
1036 | desc->ext_prop_len += ext_prop->data_len; | |
1037 | if (ext_prop->type == USB_EXT_PROP_UNICODE || | |
1038 | ext_prop->type == USB_EXT_PROP_UNICODE_ENV || | |
1039 | ext_prop->type == USB_EXT_PROP_UNICODE_LINK) { | |
1040 | desc->ext_prop_len -= ext_prop->data_len; | |
1041 | ext_prop->data_len <<= 1; | |
1042 | ext_prop->data_len += 2; | |
1043 | desc->ext_prop_len += ext_prop->data_len; | |
1044 | } | |
1045 | if (desc->opts_mutex) | |
1046 | mutex_unlock(desc->opts_mutex); | |
1047 | return ret_len; | |
1048 | } | |
1049 | ||
1050 | static struct usb_os_desc_ext_prop_attribute ext_prop_type = | |
1051 | __CONFIGFS_ATTR(type, S_IRUGO | S_IWUSR, | |
1052 | ext_prop_type_show, ext_prop_type_store); | |
1053 | ||
1054 | static struct usb_os_desc_ext_prop_attribute ext_prop_data = | |
1055 | __CONFIGFS_ATTR(data, S_IRUGO | S_IWUSR, | |
1056 | ext_prop_data_show, ext_prop_data_store); | |
1057 | ||
1058 | static struct configfs_attribute *ext_prop_attrs[] = { | |
1059 | &ext_prop_type.attr, | |
1060 | &ext_prop_data.attr, | |
1061 | NULL, | |
1062 | }; | |
1063 | ||
1064 | static void usb_os_desc_ext_prop_release(struct config_item *item) | |
1065 | { | |
1066 | struct usb_os_desc_ext_prop *ext_prop = to_usb_os_desc_ext_prop(item); | |
1067 | ||
1068 | kfree(ext_prop); /* frees a whole chunk */ | |
1069 | } | |
1070 | ||
1071 | static struct configfs_item_operations ext_prop_ops = { | |
1072 | .release = usb_os_desc_ext_prop_release, | |
1073 | .show_attribute = usb_os_desc_ext_prop_attr_show, | |
1074 | .store_attribute = usb_os_desc_ext_prop_attr_store, | |
1075 | }; | |
1076 | ||
1077 | static struct config_item *ext_prop_make( | |
1078 | struct config_group *group, | |
1079 | const char *name) | |
1080 | { | |
1081 | struct usb_os_desc_ext_prop *ext_prop; | |
1082 | struct config_item_type *ext_prop_type; | |
1083 | struct usb_os_desc *desc; | |
1084 | char *vlabuf; | |
1085 | ||
1086 | vla_group(data_chunk); | |
1087 | vla_item(data_chunk, struct usb_os_desc_ext_prop, ext_prop, 1); | |
1088 | vla_item(data_chunk, struct config_item_type, ext_prop_type, 1); | |
1089 | ||
1090 | vlabuf = kzalloc(vla_group_size(data_chunk), GFP_KERNEL); | |
1091 | if (!vlabuf) | |
1092 | return ERR_PTR(-ENOMEM); | |
1093 | ||
1094 | ext_prop = vla_ptr(vlabuf, data_chunk, ext_prop); | |
1095 | ext_prop_type = vla_ptr(vlabuf, data_chunk, ext_prop_type); | |
1096 | ||
1097 | desc = container_of(group, struct usb_os_desc, group); | |
1098 | ext_prop_type->ct_item_ops = &ext_prop_ops; | |
1099 | ext_prop_type->ct_attrs = ext_prop_attrs; | |
1100 | ext_prop_type->ct_owner = desc->owner; | |
1101 | ||
1102 | config_item_init_type_name(&ext_prop->item, name, ext_prop_type); | |
1103 | ||
1104 | ext_prop->name = kstrdup(name, GFP_KERNEL); | |
1105 | if (!ext_prop->name) { | |
1106 | kfree(vlabuf); | |
1107 | return ERR_PTR(-ENOMEM); | |
1108 | } | |
1109 | desc->ext_prop_len += 14; | |
1110 | ext_prop->name_len = 2 * strlen(ext_prop->name) + 2; | |
1111 | if (desc->opts_mutex) | |
1112 | mutex_lock(desc->opts_mutex); | |
1113 | desc->ext_prop_len += ext_prop->name_len; | |
1114 | list_add_tail(&ext_prop->entry, &desc->ext_prop); | |
1115 | ++desc->ext_prop_count; | |
1116 | if (desc->opts_mutex) | |
1117 | mutex_unlock(desc->opts_mutex); | |
1118 | ||
1119 | return &ext_prop->item; | |
1120 | } | |
1121 | ||
1122 | static void ext_prop_drop(struct config_group *group, struct config_item *item) | |
1123 | { | |
1124 | struct usb_os_desc_ext_prop *ext_prop = to_usb_os_desc_ext_prop(item); | |
1125 | struct usb_os_desc *desc = to_usb_os_desc(&group->cg_item); | |
1126 | ||
1127 | if (desc->opts_mutex) | |
1128 | mutex_lock(desc->opts_mutex); | |
1129 | list_del(&ext_prop->entry); | |
1130 | --desc->ext_prop_count; | |
1131 | kfree(ext_prop->name); | |
1132 | desc->ext_prop_len -= (ext_prop->name_len + ext_prop->data_len + 14); | |
1133 | if (desc->opts_mutex) | |
1134 | mutex_unlock(desc->opts_mutex); | |
1135 | config_item_put(item); | |
1136 | } | |
1137 | ||
1138 | static struct configfs_group_operations interf_grp_ops = { | |
1139 | .make_item = &ext_prop_make, | |
1140 | .drop_item = &ext_prop_drop, | |
1141 | }; | |
1142 | ||
da424314 AP |
1143 | static struct configfs_item_operations interf_item_ops = { |
1144 | .show_attribute = usb_os_desc_attr_show, | |
1145 | .store_attribute = usb_os_desc_attr_store, | |
1146 | }; | |
1147 | ||
1148 | static ssize_t rndis_grp_compatible_id_show(struct usb_os_desc *desc, | |
1149 | char *page) | |
1150 | { | |
1151 | memcpy(page, desc->ext_compat_id, 8); | |
1152 | return 8; | |
1153 | } | |
1154 | ||
1155 | static ssize_t rndis_grp_compatible_id_store(struct usb_os_desc *desc, | |
1156 | const char *page, size_t len) | |
1157 | { | |
1158 | int l; | |
1159 | ||
1160 | l = min_t(int, 8, len); | |
1161 | if (page[l - 1] == '\n') | |
1162 | --l; | |
1163 | if (desc->opts_mutex) | |
1164 | mutex_lock(desc->opts_mutex); | |
1165 | memcpy(desc->ext_compat_id, page, l); | |
1166 | desc->ext_compat_id[l] = '\0'; | |
1167 | ||
1168 | if (desc->opts_mutex) | |
1169 | mutex_unlock(desc->opts_mutex); | |
1170 | ||
1171 | return len; | |
1172 | } | |
1173 | ||
1174 | static struct usb_os_desc_attribute rndis_grp_attr_compatible_id = | |
1175 | __CONFIGFS_ATTR(compatible_id, S_IRUGO | S_IWUSR, | |
1176 | rndis_grp_compatible_id_show, | |
1177 | rndis_grp_compatible_id_store); | |
1178 | ||
1179 | static ssize_t rndis_grp_sub_compatible_id_show(struct usb_os_desc *desc, | |
1180 | char *page) | |
1181 | { | |
1182 | memcpy(page, desc->ext_compat_id + 8, 8); | |
1183 | return 8; | |
1184 | } | |
1185 | ||
1186 | static ssize_t rndis_grp_sub_compatible_id_store(struct usb_os_desc *desc, | |
1187 | const char *page, size_t len) | |
1188 | { | |
1189 | int l; | |
1190 | ||
1191 | l = min_t(int, 8, len); | |
1192 | if (page[l - 1] == '\n') | |
1193 | --l; | |
1194 | if (desc->opts_mutex) | |
1195 | mutex_lock(desc->opts_mutex); | |
1196 | memcpy(desc->ext_compat_id + 8, page, l); | |
1197 | desc->ext_compat_id[l + 8] = '\0'; | |
1198 | ||
1199 | if (desc->opts_mutex) | |
1200 | mutex_unlock(desc->opts_mutex); | |
1201 | ||
1202 | return len; | |
1203 | } | |
1204 | ||
1205 | static struct usb_os_desc_attribute rndis_grp_attr_sub_compatible_id = | |
1206 | __CONFIGFS_ATTR(sub_compatible_id, S_IRUGO | S_IWUSR, | |
1207 | rndis_grp_sub_compatible_id_show, | |
1208 | rndis_grp_sub_compatible_id_store); | |
1209 | ||
1210 | static struct configfs_attribute *interf_grp_attrs[] = { | |
1211 | &rndis_grp_attr_compatible_id.attr, | |
1212 | &rndis_grp_attr_sub_compatible_id.attr, | |
1213 | NULL | |
1214 | }; | |
1215 | ||
1216 | int usb_os_desc_prepare_interf_dir(struct config_group *parent, | |
1217 | int n_interf, | |
1218 | struct usb_os_desc **desc, | |
1219 | struct module *owner) | |
1220 | { | |
1221 | struct config_group **f_default_groups, *os_desc_group, | |
1222 | **interface_groups; | |
1223 | struct config_item_type *os_desc_type, *interface_type; | |
1224 | ||
1225 | vla_group(data_chunk); | |
1226 | vla_item(data_chunk, struct config_group *, f_default_groups, 2); | |
1227 | vla_item(data_chunk, struct config_group, os_desc_group, 1); | |
1228 | vla_item(data_chunk, struct config_group *, interface_groups, | |
1229 | n_interf + 1); | |
1230 | vla_item(data_chunk, struct config_item_type, os_desc_type, 1); | |
1231 | vla_item(data_chunk, struct config_item_type, interface_type, 1); | |
1232 | ||
1233 | char *vlabuf = kzalloc(vla_group_size(data_chunk), GFP_KERNEL); | |
1234 | if (!vlabuf) | |
1235 | return -ENOMEM; | |
1236 | ||
1237 | f_default_groups = vla_ptr(vlabuf, data_chunk, f_default_groups); | |
1238 | os_desc_group = vla_ptr(vlabuf, data_chunk, os_desc_group); | |
1239 | os_desc_type = vla_ptr(vlabuf, data_chunk, os_desc_type); | |
1240 | interface_groups = vla_ptr(vlabuf, data_chunk, interface_groups); | |
1241 | interface_type = vla_ptr(vlabuf, data_chunk, interface_type); | |
1242 | ||
1243 | parent->default_groups = f_default_groups; | |
1244 | os_desc_type->ct_owner = owner; | |
1245 | config_group_init_type_name(os_desc_group, "os_desc", os_desc_type); | |
1246 | f_default_groups[0] = os_desc_group; | |
1247 | ||
1248 | os_desc_group->default_groups = interface_groups; | |
1249 | interface_type->ct_item_ops = &interf_item_ops; | |
7419485f | 1250 | interface_type->ct_group_ops = &interf_grp_ops; |
da424314 AP |
1251 | interface_type->ct_attrs = interf_grp_attrs; |
1252 | interface_type->ct_owner = owner; | |
1253 | ||
1254 | while (n_interf--) { | |
1255 | struct usb_os_desc *d; | |
1256 | ||
1257 | d = desc[n_interf]; | |
7419485f | 1258 | d->owner = owner; |
da424314 AP |
1259 | config_group_init_type_name(&d->group, "", interface_type); |
1260 | config_item_set_name(&d->group.cg_item, "interface.%d", | |
1261 | n_interf); | |
1262 | interface_groups[n_interf] = &d->group; | |
1263 | } | |
1264 | ||
1265 | return 0; | |
1266 | } | |
1267 | EXPORT_SYMBOL(usb_os_desc_prepare_interf_dir); | |
1268 | ||
88af8bbe SAS |
1269 | static int configfs_do_nothing(struct usb_composite_dev *cdev) |
1270 | { | |
75bfe23a | 1271 | WARN_ON(1); |
88af8bbe SAS |
1272 | return -EINVAL; |
1273 | } | |
1274 | ||
1275 | int composite_dev_prepare(struct usb_composite_driver *composite, | |
1276 | struct usb_composite_dev *dev); | |
1277 | ||
da424314 AP |
1278 | int composite_os_desc_req_prepare(struct usb_composite_dev *cdev, |
1279 | struct usb_ep *ep0); | |
1280 | ||
88af8bbe SAS |
1281 | static void purge_configs_funcs(struct gadget_info *gi) |
1282 | { | |
1283 | struct usb_configuration *c; | |
1284 | ||
1285 | list_for_each_entry(c, &gi->cdev.configs, list) { | |
1286 | struct usb_function *f, *tmp; | |
1287 | struct config_usb_cfg *cfg; | |
1288 | ||
1289 | cfg = container_of(c, struct config_usb_cfg, c); | |
1290 | ||
1291 | list_for_each_entry_safe(f, tmp, &c->functions, list) { | |
1292 | ||
1293 | list_move_tail(&f->list, &cfg->func_list); | |
1294 | if (f->unbind) { | |
1295 | dev_err(&gi->cdev.gadget->dev, "unbind function" | |
1296 | " '%s'/%p\n", f->name, f); | |
1297 | f->unbind(c, f); | |
1298 | } | |
1299 | } | |
1300 | c->next_interface_id = 0; | |
1301 | c->superspeed = 0; | |
1302 | c->highspeed = 0; | |
1303 | c->fullspeed = 0; | |
1304 | } | |
1305 | } | |
1306 | ||
1307 | static int configfs_composite_bind(struct usb_gadget *gadget, | |
1308 | struct usb_gadget_driver *gdriver) | |
1309 | { | |
1310 | struct usb_composite_driver *composite = to_cdriver(gdriver); | |
1311 | struct gadget_info *gi = container_of(composite, | |
1312 | struct gadget_info, composite); | |
1313 | struct usb_composite_dev *cdev = &gi->cdev; | |
1314 | struct usb_configuration *c; | |
1315 | struct usb_string *s; | |
1316 | unsigned i; | |
1317 | int ret; | |
1318 | ||
1319 | /* the gi->lock is hold by the caller */ | |
1320 | cdev->gadget = gadget; | |
1321 | set_gadget_data(gadget, cdev); | |
1322 | ret = composite_dev_prepare(composite, cdev); | |
1323 | if (ret) | |
1324 | return ret; | |
1325 | /* and now the gadget bind */ | |
1326 | ret = -EINVAL; | |
1327 | ||
1328 | if (list_empty(&gi->cdev.configs)) { | |
4d9f872c | 1329 | pr_err("Need at least one configuration in %s.\n", |
88af8bbe SAS |
1330 | gi->composite.name); |
1331 | goto err_comp_cleanup; | |
1332 | } | |
1333 | ||
1334 | ||
1335 | list_for_each_entry(c, &gi->cdev.configs, list) { | |
1336 | struct config_usb_cfg *cfg; | |
1337 | ||
1338 | cfg = container_of(c, struct config_usb_cfg, c); | |
1339 | if (list_empty(&cfg->func_list)) { | |
4d9f872c | 1340 | pr_err("Config %s/%d of %s needs at least one function.\n", |
88af8bbe SAS |
1341 | c->label, c->bConfigurationValue, |
1342 | gi->composite.name); | |
1343 | goto err_comp_cleanup; | |
1344 | } | |
1345 | } | |
1346 | ||
1347 | /* init all strings */ | |
1348 | if (!list_empty(&gi->string_list)) { | |
1349 | struct gadget_strings *gs; | |
1350 | ||
1351 | i = 0; | |
1352 | list_for_each_entry(gs, &gi->string_list, list) { | |
1353 | ||
1354 | gi->gstrings[i] = &gs->stringtab_dev; | |
1355 | gs->stringtab_dev.strings = gs->strings; | |
1356 | gs->strings[USB_GADGET_MANUFACTURER_IDX].s = | |
1357 | gs->manufacturer; | |
1358 | gs->strings[USB_GADGET_PRODUCT_IDX].s = gs->product; | |
1359 | gs->strings[USB_GADGET_SERIAL_IDX].s = gs->serialnumber; | |
1360 | i++; | |
1361 | } | |
1362 | gi->gstrings[i] = NULL; | |
1363 | s = usb_gstrings_attach(&gi->cdev, gi->gstrings, | |
1364 | USB_GADGET_FIRST_AVAIL_IDX); | |
fea77077 WY |
1365 | if (IS_ERR(s)) { |
1366 | ret = PTR_ERR(s); | |
88af8bbe | 1367 | goto err_comp_cleanup; |
fea77077 | 1368 | } |
88af8bbe SAS |
1369 | |
1370 | gi->cdev.desc.iManufacturer = s[USB_GADGET_MANUFACTURER_IDX].id; | |
1371 | gi->cdev.desc.iProduct = s[USB_GADGET_PRODUCT_IDX].id; | |
1372 | gi->cdev.desc.iSerialNumber = s[USB_GADGET_SERIAL_IDX].id; | |
1373 | } | |
1374 | ||
87213d38 AP |
1375 | if (gi->use_os_desc) { |
1376 | cdev->use_os_string = true; | |
1377 | cdev->b_vendor_code = gi->b_vendor_code; | |
1378 | memcpy(cdev->qw_sign, gi->qw_sign, OS_STRING_QW_SIGN_LEN); | |
1379 | } | |
1380 | ||
88af8bbe SAS |
1381 | /* Go through all configs, attach all functions */ |
1382 | list_for_each_entry(c, &gi->cdev.configs, list) { | |
1383 | struct config_usb_cfg *cfg; | |
1384 | struct usb_function *f; | |
1385 | struct usb_function *tmp; | |
1386 | struct gadget_config_name *cn; | |
1387 | ||
1388 | cfg = container_of(c, struct config_usb_cfg, c); | |
1389 | if (!list_empty(&cfg->string_list)) { | |
1390 | i = 0; | |
1391 | list_for_each_entry(cn, &cfg->string_list, list) { | |
1392 | cfg->gstrings[i] = &cn->stringtab_dev; | |
1393 | cn->stringtab_dev.strings = &cn->strings; | |
1394 | cn->strings.s = cn->configuration; | |
1395 | i++; | |
1396 | } | |
1397 | cfg->gstrings[i] = NULL; | |
1398 | s = usb_gstrings_attach(&gi->cdev, cfg->gstrings, 1); | |
fea77077 WY |
1399 | if (IS_ERR(s)) { |
1400 | ret = PTR_ERR(s); | |
88af8bbe | 1401 | goto err_comp_cleanup; |
fea77077 | 1402 | } |
88af8bbe SAS |
1403 | c->iConfiguration = s[0].id; |
1404 | } | |
1405 | ||
1406 | list_for_each_entry_safe(f, tmp, &cfg->func_list, list) { | |
1407 | list_del(&f->list); | |
1408 | ret = usb_add_function(c, f); | |
5a68e9b5 AP |
1409 | if (ret) { |
1410 | list_add(&f->list, &cfg->func_list); | |
88af8bbe | 1411 | goto err_purge_funcs; |
5a68e9b5 | 1412 | } |
88af8bbe SAS |
1413 | } |
1414 | usb_ep_autoconfig_reset(cdev->gadget); | |
1415 | } | |
da424314 AP |
1416 | if (cdev->use_os_string) { |
1417 | ret = composite_os_desc_req_prepare(cdev, gadget->ep0); | |
1418 | if (ret) | |
1419 | goto err_purge_funcs; | |
1420 | } | |
1421 | ||
88af8bbe SAS |
1422 | usb_ep_autoconfig_reset(cdev->gadget); |
1423 | return 0; | |
1424 | ||
1425 | err_purge_funcs: | |
1426 | purge_configs_funcs(gi); | |
1427 | err_comp_cleanup: | |
1428 | composite_dev_cleanup(cdev); | |
1429 | return ret; | |
1430 | } | |
1431 | ||
1432 | static void configfs_composite_unbind(struct usb_gadget *gadget) | |
1433 | { | |
1434 | struct usb_composite_dev *cdev; | |
1435 | struct gadget_info *gi; | |
1436 | ||
1437 | /* the gi->lock is hold by the caller */ | |
1438 | ||
1439 | cdev = get_gadget_data(gadget); | |
1440 | gi = container_of(cdev, struct gadget_info, cdev); | |
1441 | ||
1442 | purge_configs_funcs(gi); | |
1443 | composite_dev_cleanup(cdev); | |
1444 | usb_ep_autoconfig_reset(cdev->gadget); | |
1445 | cdev->gadget = NULL; | |
1446 | set_gadget_data(gadget, NULL); | |
1447 | } | |
1448 | ||
1449 | static const struct usb_gadget_driver configfs_driver_template = { | |
1450 | .bind = configfs_composite_bind, | |
1451 | .unbind = configfs_composite_unbind, | |
1452 | ||
1453 | .setup = composite_setup, | |
1454 | .disconnect = composite_disconnect, | |
1455 | ||
1456 | .max_speed = USB_SPEED_SUPER, | |
1457 | .driver = { | |
1458 | .owner = THIS_MODULE, | |
1459 | .name = "configfs-gadget", | |
1460 | }, | |
1461 | }; | |
1462 | ||
1463 | static struct config_group *gadgets_make( | |
1464 | struct config_group *group, | |
1465 | const char *name) | |
1466 | { | |
1467 | struct gadget_info *gi; | |
1468 | ||
1469 | gi = kzalloc(sizeof(*gi), GFP_KERNEL); | |
1470 | if (!gi) | |
1471 | return ERR_PTR(-ENOMEM); | |
1472 | ||
1473 | gi->group.default_groups = gi->default_groups; | |
1474 | gi->group.default_groups[0] = &gi->functions_group; | |
1475 | gi->group.default_groups[1] = &gi->configs_group; | |
1476 | gi->group.default_groups[2] = &gi->strings_group; | |
87213d38 | 1477 | gi->group.default_groups[3] = &gi->os_desc_group; |
88af8bbe SAS |
1478 | |
1479 | config_group_init_type_name(&gi->functions_group, "functions", | |
1480 | &functions_type); | |
1481 | config_group_init_type_name(&gi->configs_group, "configs", | |
1482 | &config_desc_type); | |
1483 | config_group_init_type_name(&gi->strings_group, "strings", | |
1484 | &gadget_strings_strings_type); | |
87213d38 AP |
1485 | config_group_init_type_name(&gi->os_desc_group, "os_desc", |
1486 | &os_desc_type); | |
88af8bbe SAS |
1487 | |
1488 | gi->composite.bind = configfs_do_nothing; | |
1489 | gi->composite.unbind = configfs_do_nothing; | |
1490 | gi->composite.suspend = NULL; | |
1491 | gi->composite.resume = NULL; | |
1492 | gi->composite.max_speed = USB_SPEED_SUPER; | |
1493 | ||
1494 | mutex_init(&gi->lock); | |
1495 | INIT_LIST_HEAD(&gi->string_list); | |
1496 | INIT_LIST_HEAD(&gi->available_func); | |
1497 | ||
1498 | composite_init_dev(&gi->cdev); | |
1499 | gi->cdev.desc.bLength = USB_DT_DEVICE_SIZE; | |
1500 | gi->cdev.desc.bDescriptorType = USB_DT_DEVICE; | |
1501 | gi->cdev.desc.bcdDevice = cpu_to_le16(get_default_bcdDevice()); | |
1502 | ||
1503 | gi->composite.gadget_driver = configfs_driver_template; | |
1504 | ||
1505 | gi->composite.gadget_driver.function = kstrdup(name, GFP_KERNEL); | |
1506 | gi->composite.name = gi->composite.gadget_driver.function; | |
1507 | ||
1508 | if (!gi->composite.gadget_driver.function) | |
1509 | goto err; | |
1510 | ||
1511 | #ifdef CONFIG_USB_OTG | |
1512 | gi->otg.bLength = sizeof(struct usb_otg_descriptor); | |
1513 | gi->otg.bDescriptorType = USB_DT_OTG; | |
1514 | gi->otg.bmAttributes = USB_OTG_SRP | USB_OTG_HNP; | |
1515 | #endif | |
1516 | ||
1517 | config_group_init_type_name(&gi->group, name, | |
1518 | &gadget_root_type); | |
1519 | return &gi->group; | |
1520 | err: | |
1521 | kfree(gi); | |
1522 | return ERR_PTR(-ENOMEM); | |
1523 | } | |
1524 | ||
1525 | static void gadgets_drop(struct config_group *group, struct config_item *item) | |
1526 | { | |
1527 | config_item_put(item); | |
1528 | } | |
1529 | ||
1530 | static struct configfs_group_operations gadgets_ops = { | |
1531 | .make_group = &gadgets_make, | |
1532 | .drop_item = &gadgets_drop, | |
1533 | }; | |
1534 | ||
1535 | static struct config_item_type gadgets_type = { | |
1536 | .ct_group_ops = &gadgets_ops, | |
1537 | .ct_owner = THIS_MODULE, | |
1538 | }; | |
1539 | ||
1540 | static struct configfs_subsystem gadget_subsys = { | |
1541 | .su_group = { | |
1542 | .cg_item = { | |
1543 | .ci_namebuf = "usb_gadget", | |
1544 | .ci_type = &gadgets_type, | |
1545 | }, | |
1546 | }, | |
1547 | .su_mutex = __MUTEX_INITIALIZER(gadget_subsys.su_mutex), | |
1548 | }; | |
1549 | ||
092a4bd0 AP |
1550 | void unregister_gadget_item(struct config_item *item) |
1551 | { | |
1552 | struct gadget_info *gi = to_gadget_info(item); | |
1553 | ||
1554 | unregister_gadget(gi); | |
1555 | } | |
0700faaf | 1556 | EXPORT_SYMBOL_GPL(unregister_gadget_item); |
092a4bd0 | 1557 | |
88af8bbe SAS |
1558 | static int __init gadget_cfs_init(void) |
1559 | { | |
1560 | int ret; | |
1561 | ||
1562 | config_group_init(&gadget_subsys.su_group); | |
1563 | ||
1564 | ret = configfs_register_subsystem(&gadget_subsys); | |
1565 | return ret; | |
1566 | } | |
1567 | module_init(gadget_cfs_init); | |
1568 | ||
1569 | static void __exit gadget_cfs_exit(void) | |
1570 | { | |
1571 | configfs_unregister_subsystem(&gadget_subsys); | |
1572 | } | |
1573 | module_exit(gadget_cfs_exit); |