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]; | |
88af8bbe SAS |
64 | }; |
65 | ||
45b6a73f CH |
66 | static inline struct gadget_info *to_gadget_info(struct config_item *item) |
67 | { | |
68 | return container_of(to_config_group(item), struct gadget_info, group); | |
69 | } | |
70 | ||
88af8bbe SAS |
71 | struct config_usb_cfg { |
72 | struct config_group group; | |
73 | struct config_group strings_group; | |
88af8bbe SAS |
74 | struct list_head string_list; |
75 | struct usb_configuration c; | |
76 | struct list_head func_list; | |
77 | struct usb_gadget_strings *gstrings[MAX_USB_STRING_LANGS + 1]; | |
78 | }; | |
79 | ||
45b6a73f CH |
80 | static inline struct config_usb_cfg *to_config_usb_cfg(struct config_item *item) |
81 | { | |
82 | return container_of(to_config_group(item), struct config_usb_cfg, | |
83 | group); | |
84 | } | |
85 | ||
88af8bbe SAS |
86 | struct gadget_strings { |
87 | struct usb_gadget_strings stringtab_dev; | |
88 | struct usb_string strings[USB_GADGET_FIRST_AVAIL_IDX]; | |
89 | char *manufacturer; | |
90 | char *product; | |
91 | char *serialnumber; | |
92 | ||
93 | struct config_group group; | |
94 | struct list_head list; | |
95 | }; | |
96 | ||
87213d38 AP |
97 | struct os_desc { |
98 | struct config_group group; | |
99 | }; | |
100 | ||
88af8bbe SAS |
101 | struct gadget_config_name { |
102 | struct usb_gadget_strings stringtab_dev; | |
103 | struct usb_string strings; | |
104 | char *configuration; | |
105 | ||
106 | struct config_group group; | |
107 | struct list_head list; | |
108 | }; | |
109 | ||
110 | static int usb_string_copy(const char *s, char **s_copy) | |
111 | { | |
112 | int ret; | |
113 | char *str; | |
114 | char *copy = *s_copy; | |
115 | ret = strlen(s); | |
116 | if (ret > 126) | |
117 | return -EOVERFLOW; | |
118 | ||
119 | str = kstrdup(s, GFP_KERNEL); | |
120 | if (!str) | |
121 | return -ENOMEM; | |
122 | if (str[ret - 1] == '\n') | |
123 | str[ret - 1] = '\0'; | |
124 | kfree(copy); | |
125 | *s_copy = str; | |
126 | return 0; | |
127 | } | |
128 | ||
88af8bbe | 129 | #define GI_DEVICE_DESC_SIMPLE_R_u8(__name) \ |
45b6a73f | 130 | static ssize_t gadget_dev_desc_##__name##_show(struct config_item *item, \ |
88af8bbe SAS |
131 | char *page) \ |
132 | { \ | |
45b6a73f CH |
133 | return sprintf(page, "0x%02x\n", \ |
134 | to_gadget_info(item)->cdev.desc.__name); \ | |
88af8bbe SAS |
135 | } |
136 | ||
137 | #define GI_DEVICE_DESC_SIMPLE_R_u16(__name) \ | |
45b6a73f | 138 | static ssize_t gadget_dev_desc_##__name##_show(struct config_item *item, \ |
88af8bbe SAS |
139 | char *page) \ |
140 | { \ | |
45b6a73f CH |
141 | return sprintf(page, "0x%04x\n", \ |
142 | le16_to_cpup(&to_gadget_info(item)->cdev.desc.__name)); \ | |
88af8bbe SAS |
143 | } |
144 | ||
145 | ||
146 | #define GI_DEVICE_DESC_SIMPLE_W_u8(_name) \ | |
45b6a73f | 147 | static ssize_t gadget_dev_desc_##_name##_store(struct config_item *item, \ |
88af8bbe SAS |
148 | const char *page, size_t len) \ |
149 | { \ | |
150 | u8 val; \ | |
151 | int ret; \ | |
152 | ret = kstrtou8(page, 0, &val); \ | |
153 | if (ret) \ | |
154 | return ret; \ | |
45b6a73f | 155 | to_gadget_info(item)->cdev.desc._name = val; \ |
88af8bbe SAS |
156 | return len; \ |
157 | } | |
158 | ||
159 | #define GI_DEVICE_DESC_SIMPLE_W_u16(_name) \ | |
45b6a73f | 160 | static ssize_t gadget_dev_desc_##_name##_store(struct config_item *item, \ |
88af8bbe SAS |
161 | const char *page, size_t len) \ |
162 | { \ | |
163 | u16 val; \ | |
164 | int ret; \ | |
165 | ret = kstrtou16(page, 0, &val); \ | |
166 | if (ret) \ | |
167 | return ret; \ | |
45b6a73f | 168 | to_gadget_info(item)->cdev.desc._name = cpu_to_le16p(&val); \ |
88af8bbe SAS |
169 | return len; \ |
170 | } | |
171 | ||
172 | #define GI_DEVICE_DESC_SIMPLE_RW(_name, _type) \ | |
173 | GI_DEVICE_DESC_SIMPLE_R_##_type(_name) \ | |
174 | GI_DEVICE_DESC_SIMPLE_W_##_type(_name) | |
175 | ||
176 | GI_DEVICE_DESC_SIMPLE_R_u16(bcdUSB); | |
177 | GI_DEVICE_DESC_SIMPLE_RW(bDeviceClass, u8); | |
178 | GI_DEVICE_DESC_SIMPLE_RW(bDeviceSubClass, u8); | |
179 | GI_DEVICE_DESC_SIMPLE_RW(bDeviceProtocol, u8); | |
180 | GI_DEVICE_DESC_SIMPLE_RW(bMaxPacketSize0, u8); | |
181 | GI_DEVICE_DESC_SIMPLE_RW(idVendor, u16); | |
182 | GI_DEVICE_DESC_SIMPLE_RW(idProduct, u16); | |
183 | GI_DEVICE_DESC_SIMPLE_R_u16(bcdDevice); | |
184 | ||
185 | static ssize_t is_valid_bcd(u16 bcd_val) | |
186 | { | |
187 | if ((bcd_val & 0xf) > 9) | |
188 | return -EINVAL; | |
189 | if (((bcd_val >> 4) & 0xf) > 9) | |
190 | return -EINVAL; | |
191 | if (((bcd_val >> 8) & 0xf) > 9) | |
192 | return -EINVAL; | |
193 | if (((bcd_val >> 12) & 0xf) > 9) | |
194 | return -EINVAL; | |
195 | return 0; | |
196 | } | |
197 | ||
45b6a73f | 198 | static ssize_t gadget_dev_desc_bcdDevice_store(struct config_item *item, |
88af8bbe SAS |
199 | const char *page, size_t len) |
200 | { | |
201 | u16 bcdDevice; | |
202 | int ret; | |
203 | ||
204 | ret = kstrtou16(page, 0, &bcdDevice); | |
205 | if (ret) | |
206 | return ret; | |
207 | ret = is_valid_bcd(bcdDevice); | |
208 | if (ret) | |
209 | return ret; | |
210 | ||
45b6a73f | 211 | to_gadget_info(item)->cdev.desc.bcdDevice = cpu_to_le16(bcdDevice); |
88af8bbe SAS |
212 | return len; |
213 | } | |
214 | ||
45b6a73f | 215 | static ssize_t gadget_dev_desc_bcdUSB_store(struct config_item *item, |
88af8bbe SAS |
216 | const char *page, size_t len) |
217 | { | |
218 | u16 bcdUSB; | |
219 | int ret; | |
220 | ||
221 | ret = kstrtou16(page, 0, &bcdUSB); | |
222 | if (ret) | |
223 | return ret; | |
224 | ret = is_valid_bcd(bcdUSB); | |
225 | if (ret) | |
226 | return ret; | |
227 | ||
45b6a73f | 228 | to_gadget_info(item)->cdev.desc.bcdUSB = cpu_to_le16(bcdUSB); |
88af8bbe SAS |
229 | return len; |
230 | } | |
231 | ||
45b6a73f | 232 | static ssize_t gadget_dev_desc_UDC_show(struct config_item *item, char *page) |
88af8bbe | 233 | { |
afdaadc3 RB |
234 | char *udc_name = to_gadget_info(item)->composite.gadget_driver.udc_name; |
235 | ||
236 | return sprintf(page, "%s\n", udc_name ?: ""); | |
88af8bbe SAS |
237 | } |
238 | ||
239 | static int unregister_gadget(struct gadget_info *gi) | |
240 | { | |
241 | int ret; | |
242 | ||
afdaadc3 | 243 | if (!gi->composite.gadget_driver.udc_name) |
88af8bbe SAS |
244 | return -ENODEV; |
245 | ||
246 | ret = usb_gadget_unregister_driver(&gi->composite.gadget_driver); | |
247 | if (ret) | |
248 | return ret; | |
afdaadc3 RB |
249 | kfree(gi->composite.gadget_driver.udc_name); |
250 | gi->composite.gadget_driver.udc_name = NULL; | |
88af8bbe SAS |
251 | return 0; |
252 | } | |
253 | ||
45b6a73f | 254 | static ssize_t gadget_dev_desc_UDC_store(struct config_item *item, |
88af8bbe SAS |
255 | const char *page, size_t len) |
256 | { | |
45b6a73f | 257 | struct gadget_info *gi = to_gadget_info(item); |
88af8bbe SAS |
258 | char *name; |
259 | int ret; | |
260 | ||
261 | name = kstrdup(page, GFP_KERNEL); | |
262 | if (!name) | |
263 | return -ENOMEM; | |
264 | if (name[len - 1] == '\n') | |
265 | name[len - 1] = '\0'; | |
266 | ||
267 | mutex_lock(&gi->lock); | |
268 | ||
269 | if (!strlen(name)) { | |
270 | ret = unregister_gadget(gi); | |
271 | if (ret) | |
272 | goto err; | |
38355b2a | 273 | kfree(name); |
88af8bbe | 274 | } else { |
afdaadc3 | 275 | if (gi->composite.gadget_driver.udc_name) { |
88af8bbe SAS |
276 | ret = -EBUSY; |
277 | goto err; | |
278 | } | |
afdaadc3 RB |
279 | gi->composite.gadget_driver.udc_name = name; |
280 | ret = usb_gadget_probe_driver(&gi->composite.gadget_driver); | |
281 | if (ret) { | |
282 | gi->composite.gadget_driver.udc_name = NULL; | |
88af8bbe | 283 | goto err; |
afdaadc3 | 284 | } |
88af8bbe SAS |
285 | } |
286 | mutex_unlock(&gi->lock); | |
287 | return len; | |
288 | err: | |
289 | kfree(name); | |
290 | mutex_unlock(&gi->lock); | |
291 | return ret; | |
292 | } | |
293 | ||
45b6a73f CH |
294 | CONFIGFS_ATTR(gadget_dev_desc_, bDeviceClass); |
295 | CONFIGFS_ATTR(gadget_dev_desc_, bDeviceSubClass); | |
296 | CONFIGFS_ATTR(gadget_dev_desc_, bDeviceProtocol); | |
297 | CONFIGFS_ATTR(gadget_dev_desc_, bMaxPacketSize0); | |
298 | CONFIGFS_ATTR(gadget_dev_desc_, idVendor); | |
299 | CONFIGFS_ATTR(gadget_dev_desc_, idProduct); | |
300 | CONFIGFS_ATTR(gadget_dev_desc_, bcdDevice); | |
301 | CONFIGFS_ATTR(gadget_dev_desc_, bcdUSB); | |
302 | CONFIGFS_ATTR(gadget_dev_desc_, UDC); | |
88af8bbe SAS |
303 | |
304 | static struct configfs_attribute *gadget_root_attrs[] = { | |
45b6a73f CH |
305 | &gadget_dev_desc_attr_bDeviceClass, |
306 | &gadget_dev_desc_attr_bDeviceSubClass, | |
307 | &gadget_dev_desc_attr_bDeviceProtocol, | |
308 | &gadget_dev_desc_attr_bMaxPacketSize0, | |
309 | &gadget_dev_desc_attr_idVendor, | |
310 | &gadget_dev_desc_attr_idProduct, | |
311 | &gadget_dev_desc_attr_bcdDevice, | |
312 | &gadget_dev_desc_attr_bcdUSB, | |
313 | &gadget_dev_desc_attr_UDC, | |
88af8bbe SAS |
314 | NULL, |
315 | }; | |
316 | ||
88af8bbe SAS |
317 | static inline struct gadget_strings *to_gadget_strings(struct config_item *item) |
318 | { | |
319 | return container_of(to_config_group(item), struct gadget_strings, | |
320 | group); | |
321 | } | |
322 | ||
323 | static inline struct gadget_config_name *to_gadget_config_name( | |
324 | struct config_item *item) | |
325 | { | |
326 | return container_of(to_config_group(item), struct gadget_config_name, | |
327 | group); | |
328 | } | |
329 | ||
88af8bbe SAS |
330 | static inline struct usb_function_instance *to_usb_function_instance( |
331 | struct config_item *item) | |
332 | { | |
333 | return container_of(to_config_group(item), | |
334 | struct usb_function_instance, group); | |
335 | } | |
336 | ||
337 | static void gadget_info_attr_release(struct config_item *item) | |
338 | { | |
339 | struct gadget_info *gi = to_gadget_info(item); | |
340 | ||
341 | WARN_ON(!list_empty(&gi->cdev.configs)); | |
342 | WARN_ON(!list_empty(&gi->string_list)); | |
343 | WARN_ON(!list_empty(&gi->available_func)); | |
344 | kfree(gi->composite.gadget_driver.function); | |
345 | kfree(gi); | |
346 | } | |
347 | ||
88af8bbe SAS |
348 | static struct configfs_item_operations gadget_root_item_ops = { |
349 | .release = gadget_info_attr_release, | |
88af8bbe SAS |
350 | }; |
351 | ||
352 | static void gadget_config_attr_release(struct config_item *item) | |
353 | { | |
354 | struct config_usb_cfg *cfg = to_config_usb_cfg(item); | |
355 | ||
356 | WARN_ON(!list_empty(&cfg->c.functions)); | |
357 | list_del(&cfg->c.list); | |
358 | kfree(cfg->c.label); | |
359 | kfree(cfg); | |
360 | } | |
361 | ||
362 | static int config_usb_cfg_link( | |
363 | struct config_item *usb_cfg_ci, | |
364 | struct config_item *usb_func_ci) | |
365 | { | |
366 | struct config_usb_cfg *cfg = to_config_usb_cfg(usb_cfg_ci); | |
367 | struct usb_composite_dev *cdev = cfg->c.cdev; | |
368 | struct gadget_info *gi = container_of(cdev, struct gadget_info, cdev); | |
369 | ||
370 | struct config_group *group = to_config_group(usb_func_ci); | |
371 | struct usb_function_instance *fi = container_of(group, | |
372 | struct usb_function_instance, group); | |
373 | struct usb_function_instance *a_fi; | |
374 | struct usb_function *f; | |
375 | int ret; | |
376 | ||
377 | mutex_lock(&gi->lock); | |
378 | /* | |
379 | * Make sure this function is from within our _this_ gadget and not | |
380 | * from another gadget or a random directory. | |
381 | * Also a function instance can only be linked once. | |
382 | */ | |
383 | list_for_each_entry(a_fi, &gi->available_func, cfs_list) { | |
384 | if (a_fi == fi) | |
385 | break; | |
386 | } | |
387 | if (a_fi != fi) { | |
388 | ret = -EINVAL; | |
389 | goto out; | |
390 | } | |
391 | ||
392 | list_for_each_entry(f, &cfg->func_list, list) { | |
393 | if (f->fi == fi) { | |
394 | ret = -EEXIST; | |
395 | goto out; | |
396 | } | |
397 | } | |
398 | ||
399 | f = usb_get_function(fi); | |
400 | if (IS_ERR(f)) { | |
401 | ret = PTR_ERR(f); | |
402 | goto out; | |
403 | } | |
404 | ||
405 | /* stash the function until we bind it to the gadget */ | |
406 | list_add_tail(&f->list, &cfg->func_list); | |
407 | ret = 0; | |
408 | out: | |
409 | mutex_unlock(&gi->lock); | |
410 | return ret; | |
411 | } | |
412 | ||
e16769d4 | 413 | static void config_usb_cfg_unlink( |
88af8bbe SAS |
414 | struct config_item *usb_cfg_ci, |
415 | struct config_item *usb_func_ci) | |
416 | { | |
417 | struct config_usb_cfg *cfg = to_config_usb_cfg(usb_cfg_ci); | |
418 | struct usb_composite_dev *cdev = cfg->c.cdev; | |
419 | struct gadget_info *gi = container_of(cdev, struct gadget_info, cdev); | |
420 | ||
421 | struct config_group *group = to_config_group(usb_func_ci); | |
422 | struct usb_function_instance *fi = container_of(group, | |
423 | struct usb_function_instance, group); | |
424 | struct usb_function *f; | |
425 | ||
426 | /* | |
427 | * ideally I would like to forbid to unlink functions while a gadget is | |
428 | * bound to an UDC. Since this isn't possible at the moment, we simply | |
429 | * force an unbind, the function is available here and then we can | |
430 | * remove the function. | |
431 | */ | |
432 | mutex_lock(&gi->lock); | |
afdaadc3 | 433 | if (gi->composite.gadget_driver.udc_name) |
88af8bbe | 434 | unregister_gadget(gi); |
afdaadc3 | 435 | WARN_ON(gi->composite.gadget_driver.udc_name); |
88af8bbe SAS |
436 | |
437 | list_for_each_entry(f, &cfg->func_list, list) { | |
438 | if (f->fi == fi) { | |
439 | list_del(&f->list); | |
440 | usb_put_function(f); | |
441 | mutex_unlock(&gi->lock); | |
e16769d4 | 442 | return; |
88af8bbe SAS |
443 | } |
444 | } | |
445 | mutex_unlock(&gi->lock); | |
75bfe23a | 446 | WARN(1, "Unable to locate function to unbind\n"); |
88af8bbe SAS |
447 | } |
448 | ||
88af8bbe SAS |
449 | static struct configfs_item_operations gadget_config_item_ops = { |
450 | .release = gadget_config_attr_release, | |
88af8bbe SAS |
451 | .allow_link = config_usb_cfg_link, |
452 | .drop_link = config_usb_cfg_unlink, | |
453 | }; | |
454 | ||
455 | ||
45b6a73f | 456 | static ssize_t gadget_config_desc_MaxPower_show(struct config_item *item, |
88af8bbe SAS |
457 | char *page) |
458 | { | |
45b6a73f | 459 | return sprintf(page, "%u\n", to_config_usb_cfg(item)->c.MaxPower); |
88af8bbe SAS |
460 | } |
461 | ||
45b6a73f | 462 | static ssize_t gadget_config_desc_MaxPower_store(struct config_item *item, |
88af8bbe SAS |
463 | const char *page, size_t len) |
464 | { | |
465 | u16 val; | |
466 | int ret; | |
467 | ret = kstrtou16(page, 0, &val); | |
468 | if (ret) | |
469 | return ret; | |
470 | if (DIV_ROUND_UP(val, 8) > 0xff) | |
471 | return -ERANGE; | |
45b6a73f | 472 | to_config_usb_cfg(item)->c.MaxPower = val; |
88af8bbe SAS |
473 | return len; |
474 | } | |
475 | ||
45b6a73f | 476 | static ssize_t gadget_config_desc_bmAttributes_show(struct config_item *item, |
88af8bbe SAS |
477 | char *page) |
478 | { | |
45b6a73f CH |
479 | return sprintf(page, "0x%02x\n", |
480 | to_config_usb_cfg(item)->c.bmAttributes); | |
88af8bbe SAS |
481 | } |
482 | ||
45b6a73f | 483 | static ssize_t gadget_config_desc_bmAttributes_store(struct config_item *item, |
88af8bbe SAS |
484 | const char *page, size_t len) |
485 | { | |
486 | u8 val; | |
487 | int ret; | |
488 | ret = kstrtou8(page, 0, &val); | |
489 | if (ret) | |
490 | return ret; | |
491 | if (!(val & USB_CONFIG_ATT_ONE)) | |
492 | return -EINVAL; | |
493 | if (val & ~(USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER | | |
494 | USB_CONFIG_ATT_WAKEUP)) | |
495 | return -EINVAL; | |
45b6a73f | 496 | to_config_usb_cfg(item)->c.bmAttributes = val; |
88af8bbe SAS |
497 | return len; |
498 | } | |
499 | ||
45b6a73f CH |
500 | CONFIGFS_ATTR(gadget_config_desc_, MaxPower); |
501 | CONFIGFS_ATTR(gadget_config_desc_, bmAttributes); | |
88af8bbe SAS |
502 | |
503 | static struct configfs_attribute *gadget_config_attrs[] = { | |
45b6a73f CH |
504 | &gadget_config_desc_attr_MaxPower, |
505 | &gadget_config_desc_attr_bmAttributes, | |
88af8bbe SAS |
506 | NULL, |
507 | }; | |
508 | ||
4ad01412 | 509 | static const struct config_item_type gadget_config_type = { |
88af8bbe SAS |
510 | .ct_item_ops = &gadget_config_item_ops, |
511 | .ct_attrs = gadget_config_attrs, | |
512 | .ct_owner = THIS_MODULE, | |
513 | }; | |
514 | ||
4ad01412 | 515 | static const struct config_item_type gadget_root_type = { |
88af8bbe SAS |
516 | .ct_item_ops = &gadget_root_item_ops, |
517 | .ct_attrs = gadget_root_attrs, | |
518 | .ct_owner = THIS_MODULE, | |
519 | }; | |
520 | ||
521 | static void composite_init_dev(struct usb_composite_dev *cdev) | |
522 | { | |
523 | spin_lock_init(&cdev->lock); | |
524 | INIT_LIST_HEAD(&cdev->configs); | |
525 | INIT_LIST_HEAD(&cdev->gstrings); | |
526 | } | |
527 | ||
528 | static struct config_group *function_make( | |
529 | struct config_group *group, | |
530 | const char *name) | |
531 | { | |
532 | struct gadget_info *gi; | |
533 | struct usb_function_instance *fi; | |
534 | char buf[MAX_NAME_LEN]; | |
535 | char *func_name; | |
536 | char *instance_name; | |
537 | int ret; | |
538 | ||
539 | ret = snprintf(buf, MAX_NAME_LEN, "%s", name); | |
540 | if (ret >= MAX_NAME_LEN) | |
541 | return ERR_PTR(-ENAMETOOLONG); | |
542 | ||
543 | func_name = buf; | |
544 | instance_name = strchr(func_name, '.'); | |
545 | if (!instance_name) { | |
546 | pr_err("Unable to locate . in FUNC.INSTANCE\n"); | |
547 | return ERR_PTR(-EINVAL); | |
548 | } | |
549 | *instance_name = '\0'; | |
550 | instance_name++; | |
551 | ||
552 | fi = usb_get_function_instance(func_name); | |
553 | if (IS_ERR(fi)) | |
a3469411 | 554 | return ERR_CAST(fi); |
88af8bbe | 555 | |
3958b792 | 556 | ret = config_item_set_name(&fi->group.cg_item, "%s", name); |
88af8bbe SAS |
557 | if (ret) { |
558 | usb_put_function_instance(fi); | |
559 | return ERR_PTR(ret); | |
560 | } | |
1933861d AP |
561 | if (fi->set_inst_name) { |
562 | ret = fi->set_inst_name(fi, instance_name); | |
563 | if (ret) { | |
564 | usb_put_function_instance(fi); | |
565 | return ERR_PTR(ret); | |
566 | } | |
567 | } | |
88af8bbe SAS |
568 | |
569 | gi = container_of(group, struct gadget_info, functions_group); | |
570 | ||
571 | mutex_lock(&gi->lock); | |
572 | list_add_tail(&fi->cfs_list, &gi->available_func); | |
573 | mutex_unlock(&gi->lock); | |
574 | return &fi->group; | |
575 | } | |
576 | ||
577 | static void function_drop( | |
578 | struct config_group *group, | |
579 | struct config_item *item) | |
580 | { | |
581 | struct usb_function_instance *fi = to_usb_function_instance(item); | |
582 | struct gadget_info *gi; | |
583 | ||
584 | gi = container_of(group, struct gadget_info, functions_group); | |
585 | ||
586 | mutex_lock(&gi->lock); | |
587 | list_del(&fi->cfs_list); | |
588 | mutex_unlock(&gi->lock); | |
589 | config_item_put(item); | |
590 | } | |
591 | ||
592 | static struct configfs_group_operations functions_ops = { | |
593 | .make_group = &function_make, | |
594 | .drop_item = &function_drop, | |
595 | }; | |
596 | ||
4ad01412 | 597 | static const struct config_item_type functions_type = { |
88af8bbe SAS |
598 | .ct_group_ops = &functions_ops, |
599 | .ct_owner = THIS_MODULE, | |
600 | }; | |
601 | ||
88af8bbe SAS |
602 | GS_STRINGS_RW(gadget_config_name, configuration); |
603 | ||
604 | static struct configfs_attribute *gadget_config_name_langid_attrs[] = { | |
45b6a73f | 605 | &gadget_config_name_attr_configuration, |
88af8bbe SAS |
606 | NULL, |
607 | }; | |
608 | ||
609 | static void gadget_config_name_attr_release(struct config_item *item) | |
610 | { | |
611 | struct gadget_config_name *cn = to_gadget_config_name(item); | |
612 | ||
613 | kfree(cn->configuration); | |
614 | ||
615 | list_del(&cn->list); | |
616 | kfree(cn); | |
617 | } | |
618 | ||
619 | USB_CONFIG_STRING_RW_OPS(gadget_config_name); | |
620 | USB_CONFIG_STRINGS_LANG(gadget_config_name, config_usb_cfg); | |
621 | ||
622 | static struct config_group *config_desc_make( | |
623 | struct config_group *group, | |
624 | const char *name) | |
625 | { | |
626 | struct gadget_info *gi; | |
627 | struct config_usb_cfg *cfg; | |
628 | char buf[MAX_NAME_LEN]; | |
629 | char *num_str; | |
630 | u8 num; | |
631 | int ret; | |
632 | ||
633 | gi = container_of(group, struct gadget_info, configs_group); | |
634 | ret = snprintf(buf, MAX_NAME_LEN, "%s", name); | |
635 | if (ret >= MAX_NAME_LEN) | |
636 | return ERR_PTR(-ENAMETOOLONG); | |
637 | ||
638 | num_str = strchr(buf, '.'); | |
639 | if (!num_str) { | |
640 | pr_err("Unable to locate . in name.bConfigurationValue\n"); | |
641 | return ERR_PTR(-EINVAL); | |
642 | } | |
643 | ||
644 | *num_str = '\0'; | |
645 | num_str++; | |
646 | ||
647 | if (!strlen(buf)) | |
648 | return ERR_PTR(-EINVAL); | |
649 | ||
650 | ret = kstrtou8(num_str, 0, &num); | |
651 | if (ret) | |
652 | return ERR_PTR(ret); | |
653 | ||
654 | cfg = kzalloc(sizeof(*cfg), GFP_KERNEL); | |
655 | if (!cfg) | |
656 | return ERR_PTR(-ENOMEM); | |
657 | cfg->c.label = kstrdup(buf, GFP_KERNEL); | |
658 | if (!cfg->c.label) { | |
659 | ret = -ENOMEM; | |
660 | goto err; | |
661 | } | |
662 | cfg->c.bConfigurationValue = num; | |
663 | cfg->c.MaxPower = CONFIG_USB_GADGET_VBUS_DRAW; | |
664 | cfg->c.bmAttributes = USB_CONFIG_ATT_ONE; | |
665 | INIT_LIST_HEAD(&cfg->string_list); | |
666 | INIT_LIST_HEAD(&cfg->func_list); | |
667 | ||
88af8bbe SAS |
668 | config_group_init_type_name(&cfg->group, name, |
669 | &gadget_config_type); | |
1ae1602d | 670 | |
88af8bbe SAS |
671 | config_group_init_type_name(&cfg->strings_group, "strings", |
672 | &gadget_config_name_strings_type); | |
1ae1602d | 673 | configfs_add_default_group(&cfg->strings_group, &cfg->group); |
88af8bbe SAS |
674 | |
675 | ret = usb_add_config_only(&gi->cdev, &cfg->c); | |
676 | if (ret) | |
677 | goto err; | |
678 | ||
679 | return &cfg->group; | |
680 | err: | |
681 | kfree(cfg->c.label); | |
682 | kfree(cfg); | |
683 | return ERR_PTR(ret); | |
684 | } | |
685 | ||
686 | static void config_desc_drop( | |
687 | struct config_group *group, | |
688 | struct config_item *item) | |
689 | { | |
690 | config_item_put(item); | |
691 | } | |
692 | ||
693 | static struct configfs_group_operations config_desc_ops = { | |
694 | .make_group = &config_desc_make, | |
695 | .drop_item = &config_desc_drop, | |
696 | }; | |
697 | ||
4ad01412 | 698 | static const struct config_item_type config_desc_type = { |
88af8bbe SAS |
699 | .ct_group_ops = &config_desc_ops, |
700 | .ct_owner = THIS_MODULE, | |
701 | }; | |
702 | ||
88af8bbe SAS |
703 | GS_STRINGS_RW(gadget_strings, manufacturer); |
704 | GS_STRINGS_RW(gadget_strings, product); | |
705 | GS_STRINGS_RW(gadget_strings, serialnumber); | |
706 | ||
707 | static struct configfs_attribute *gadget_strings_langid_attrs[] = { | |
45b6a73f CH |
708 | &gadget_strings_attr_manufacturer, |
709 | &gadget_strings_attr_product, | |
710 | &gadget_strings_attr_serialnumber, | |
88af8bbe SAS |
711 | NULL, |
712 | }; | |
713 | ||
714 | static void gadget_strings_attr_release(struct config_item *item) | |
715 | { | |
716 | struct gadget_strings *gs = to_gadget_strings(item); | |
717 | ||
718 | kfree(gs->manufacturer); | |
719 | kfree(gs->product); | |
720 | kfree(gs->serialnumber); | |
721 | ||
722 | list_del(&gs->list); | |
723 | kfree(gs); | |
724 | } | |
725 | ||
726 | USB_CONFIG_STRING_RW_OPS(gadget_strings); | |
727 | USB_CONFIG_STRINGS_LANG(gadget_strings, gadget_info); | |
728 | ||
87213d38 AP |
729 | static inline struct os_desc *to_os_desc(struct config_item *item) |
730 | { | |
731 | return container_of(to_config_group(item), struct os_desc, group); | |
732 | } | |
733 | ||
45b6a73f CH |
734 | static inline struct gadget_info *os_desc_item_to_gadget_info( |
735 | struct config_item *item) | |
87213d38 | 736 | { |
45b6a73f CH |
737 | return to_gadget_info(to_os_desc(item)->group.cg_item.ci_parent); |
738 | } | |
87213d38 | 739 | |
45b6a73f CH |
740 | static ssize_t os_desc_use_show(struct config_item *item, char *page) |
741 | { | |
e800e8cb | 742 | return sprintf(page, "%d\n", |
45b6a73f | 743 | os_desc_item_to_gadget_info(item)->use_os_desc); |
87213d38 AP |
744 | } |
745 | ||
45b6a73f | 746 | static ssize_t os_desc_use_store(struct config_item *item, const char *page, |
87213d38 AP |
747 | size_t len) |
748 | { | |
45b6a73f | 749 | struct gadget_info *gi = os_desc_item_to_gadget_info(item); |
87213d38 AP |
750 | int ret; |
751 | bool use; | |
752 | ||
87213d38 AP |
753 | mutex_lock(&gi->lock); |
754 | ret = strtobool(page, &use); | |
755 | if (!ret) { | |
756 | gi->use_os_desc = use; | |
757 | ret = len; | |
758 | } | |
759 | mutex_unlock(&gi->lock); | |
760 | ||
761 | return ret; | |
762 | } | |
763 | ||
45b6a73f | 764 | static ssize_t os_desc_b_vendor_code_show(struct config_item *item, char *page) |
87213d38 | 765 | { |
e800e8cb | 766 | return sprintf(page, "0x%02x\n", |
45b6a73f | 767 | os_desc_item_to_gadget_info(item)->b_vendor_code); |
87213d38 AP |
768 | } |
769 | ||
45b6a73f | 770 | static ssize_t os_desc_b_vendor_code_store(struct config_item *item, |
87213d38 AP |
771 | const char *page, size_t len) |
772 | { | |
45b6a73f | 773 | struct gadget_info *gi = os_desc_item_to_gadget_info(item); |
87213d38 AP |
774 | int ret; |
775 | u8 b_vendor_code; | |
776 | ||
87213d38 AP |
777 | mutex_lock(&gi->lock); |
778 | ret = kstrtou8(page, 0, &b_vendor_code); | |
779 | if (!ret) { | |
780 | gi->b_vendor_code = b_vendor_code; | |
781 | ret = len; | |
782 | } | |
783 | mutex_unlock(&gi->lock); | |
784 | ||
785 | return ret; | |
786 | } | |
787 | ||
45b6a73f | 788 | static ssize_t os_desc_qw_sign_show(struct config_item *item, char *page) |
87213d38 | 789 | { |
45b6a73f | 790 | struct gadget_info *gi = os_desc_item_to_gadget_info(item); |
76180d71 | 791 | int res; |
87213d38 | 792 | |
76180d71 SA |
793 | res = utf16s_to_utf8s((wchar_t *) gi->qw_sign, OS_STRING_QW_SIGN_LEN, |
794 | UTF16_LITTLE_ENDIAN, page, PAGE_SIZE - 1); | |
795 | page[res++] = '\n'; | |
796 | ||
797 | return res; | |
87213d38 AP |
798 | } |
799 | ||
45b6a73f | 800 | static ssize_t os_desc_qw_sign_store(struct config_item *item, const char *page, |
87213d38 AP |
801 | size_t len) |
802 | { | |
45b6a73f | 803 | struct gadget_info *gi = os_desc_item_to_gadget_info(item); |
87213d38 AP |
804 | int res, l; |
805 | ||
87213d38 AP |
806 | l = min((int)len, OS_STRING_QW_SIGN_LEN >> 1); |
807 | if (page[l - 1] == '\n') | |
808 | --l; | |
809 | ||
810 | mutex_lock(&gi->lock); | |
811 | res = utf8s_to_utf16s(page, l, | |
812 | UTF16_LITTLE_ENDIAN, (wchar_t *) gi->qw_sign, | |
813 | OS_STRING_QW_SIGN_LEN); | |
814 | if (res > 0) | |
815 | res = len; | |
816 | mutex_unlock(&gi->lock); | |
817 | ||
818 | return res; | |
819 | } | |
820 | ||
45b6a73f CH |
821 | CONFIGFS_ATTR(os_desc_, use); |
822 | CONFIGFS_ATTR(os_desc_, b_vendor_code); | |
823 | CONFIGFS_ATTR(os_desc_, qw_sign); | |
87213d38 AP |
824 | |
825 | static struct configfs_attribute *os_desc_attrs[] = { | |
45b6a73f CH |
826 | &os_desc_attr_use, |
827 | &os_desc_attr_b_vendor_code, | |
828 | &os_desc_attr_qw_sign, | |
87213d38 AP |
829 | NULL, |
830 | }; | |
831 | ||
832 | static void os_desc_attr_release(struct config_item *item) | |
833 | { | |
834 | struct os_desc *os_desc = to_os_desc(item); | |
835 | kfree(os_desc); | |
836 | } | |
837 | ||
da424314 AP |
838 | static int os_desc_link(struct config_item *os_desc_ci, |
839 | struct config_item *usb_cfg_ci) | |
840 | { | |
841 | struct gadget_info *gi = container_of(to_config_group(os_desc_ci), | |
842 | struct gadget_info, os_desc_group); | |
843 | struct usb_composite_dev *cdev = &gi->cdev; | |
844 | struct config_usb_cfg *c_target = | |
845 | container_of(to_config_group(usb_cfg_ci), | |
846 | struct config_usb_cfg, group); | |
847 | struct usb_configuration *c; | |
848 | int ret; | |
849 | ||
850 | mutex_lock(&gi->lock); | |
851 | list_for_each_entry(c, &cdev->configs, list) { | |
852 | if (c == &c_target->c) | |
853 | break; | |
854 | } | |
855 | if (c != &c_target->c) { | |
856 | ret = -EINVAL; | |
857 | goto out; | |
858 | } | |
859 | ||
860 | if (cdev->os_desc_config) { | |
861 | ret = -EBUSY; | |
862 | goto out; | |
863 | } | |
864 | ||
865 | cdev->os_desc_config = &c_target->c; | |
866 | ret = 0; | |
867 | ||
868 | out: | |
869 | mutex_unlock(&gi->lock); | |
870 | return ret; | |
871 | } | |
872 | ||
e16769d4 | 873 | static void os_desc_unlink(struct config_item *os_desc_ci, |
da424314 AP |
874 | struct config_item *usb_cfg_ci) |
875 | { | |
876 | struct gadget_info *gi = container_of(to_config_group(os_desc_ci), | |
877 | struct gadget_info, os_desc_group); | |
878 | struct usb_composite_dev *cdev = &gi->cdev; | |
879 | ||
880 | mutex_lock(&gi->lock); | |
afdaadc3 | 881 | if (gi->composite.gadget_driver.udc_name) |
da424314 AP |
882 | unregister_gadget(gi); |
883 | cdev->os_desc_config = NULL; | |
afdaadc3 | 884 | WARN_ON(gi->composite.gadget_driver.udc_name); |
da424314 | 885 | mutex_unlock(&gi->lock); |
da424314 AP |
886 | } |
887 | ||
87213d38 AP |
888 | static struct configfs_item_operations os_desc_ops = { |
889 | .release = os_desc_attr_release, | |
da424314 AP |
890 | .allow_link = os_desc_link, |
891 | .drop_link = os_desc_unlink, | |
87213d38 AP |
892 | }; |
893 | ||
894 | static struct config_item_type os_desc_type = { | |
895 | .ct_item_ops = &os_desc_ops, | |
896 | .ct_attrs = os_desc_attrs, | |
897 | .ct_owner = THIS_MODULE, | |
898 | }; | |
899 | ||
7419485f AP |
900 | static inline struct usb_os_desc_ext_prop |
901 | *to_usb_os_desc_ext_prop(struct config_item *item) | |
902 | { | |
903 | return container_of(item, struct usb_os_desc_ext_prop, item); | |
904 | } | |
905 | ||
45b6a73f | 906 | static ssize_t ext_prop_type_show(struct config_item *item, char *page) |
7419485f | 907 | { |
e800e8cb | 908 | return sprintf(page, "%d\n", to_usb_os_desc_ext_prop(item)->type); |
7419485f AP |
909 | } |
910 | ||
45b6a73f | 911 | static ssize_t ext_prop_type_store(struct config_item *item, |
7419485f AP |
912 | const char *page, size_t len) |
913 | { | |
45b6a73f | 914 | struct usb_os_desc_ext_prop *ext_prop = to_usb_os_desc_ext_prop(item); |
7419485f AP |
915 | struct usb_os_desc *desc = to_usb_os_desc(ext_prop->item.ci_parent); |
916 | u8 type; | |
917 | int ret; | |
918 | ||
919 | if (desc->opts_mutex) | |
920 | mutex_lock(desc->opts_mutex); | |
921 | ret = kstrtou8(page, 0, &type); | |
922 | if (ret) | |
923 | goto end; | |
924 | if (type < USB_EXT_PROP_UNICODE || type > USB_EXT_PROP_UNICODE_MULTI) { | |
925 | ret = -EINVAL; | |
926 | goto end; | |
927 | } | |
928 | ||
929 | if ((ext_prop->type == USB_EXT_PROP_BINARY || | |
930 | ext_prop->type == USB_EXT_PROP_LE32 || | |
931 | ext_prop->type == USB_EXT_PROP_BE32) && | |
932 | (type == USB_EXT_PROP_UNICODE || | |
933 | type == USB_EXT_PROP_UNICODE_ENV || | |
934 | type == USB_EXT_PROP_UNICODE_LINK)) | |
935 | ext_prop->data_len <<= 1; | |
936 | else if ((ext_prop->type == USB_EXT_PROP_UNICODE || | |
937 | ext_prop->type == USB_EXT_PROP_UNICODE_ENV || | |
938 | ext_prop->type == USB_EXT_PROP_UNICODE_LINK) && | |
939 | (type == USB_EXT_PROP_BINARY || | |
940 | type == USB_EXT_PROP_LE32 || | |
941 | type == USB_EXT_PROP_BE32)) | |
942 | ext_prop->data_len >>= 1; | |
943 | ext_prop->type = type; | |
944 | ret = len; | |
945 | ||
946 | end: | |
947 | if (desc->opts_mutex) | |
948 | mutex_unlock(desc->opts_mutex); | |
949 | return ret; | |
950 | } | |
951 | ||
45b6a73f | 952 | static ssize_t ext_prop_data_show(struct config_item *item, char *page) |
7419485f | 953 | { |
45b6a73f | 954 | struct usb_os_desc_ext_prop *ext_prop = to_usb_os_desc_ext_prop(item); |
7419485f AP |
955 | int len = ext_prop->data_len; |
956 | ||
957 | if (ext_prop->type == USB_EXT_PROP_UNICODE || | |
958 | ext_prop->type == USB_EXT_PROP_UNICODE_ENV || | |
959 | ext_prop->type == USB_EXT_PROP_UNICODE_LINK) | |
960 | len >>= 1; | |
961 | memcpy(page, ext_prop->data, len); | |
962 | ||
963 | return len; | |
964 | } | |
965 | ||
45b6a73f | 966 | static ssize_t ext_prop_data_store(struct config_item *item, |
7419485f AP |
967 | const char *page, size_t len) |
968 | { | |
45b6a73f | 969 | struct usb_os_desc_ext_prop *ext_prop = to_usb_os_desc_ext_prop(item); |
7419485f AP |
970 | struct usb_os_desc *desc = to_usb_os_desc(ext_prop->item.ci_parent); |
971 | char *new_data; | |
972 | size_t ret_len = len; | |
973 | ||
974 | if (page[len - 1] == '\n' || page[len - 1] == '\0') | |
975 | --len; | |
58b949e0 | 976 | new_data = kmemdup(page, len, GFP_KERNEL); |
7419485f AP |
977 | if (!new_data) |
978 | return -ENOMEM; | |
979 | ||
7419485f AP |
980 | if (desc->opts_mutex) |
981 | mutex_lock(desc->opts_mutex); | |
982 | kfree(ext_prop->data); | |
983 | ext_prop->data = new_data; | |
984 | desc->ext_prop_len -= ext_prop->data_len; | |
985 | ext_prop->data_len = len; | |
986 | desc->ext_prop_len += ext_prop->data_len; | |
987 | if (ext_prop->type == USB_EXT_PROP_UNICODE || | |
988 | ext_prop->type == USB_EXT_PROP_UNICODE_ENV || | |
989 | ext_prop->type == USB_EXT_PROP_UNICODE_LINK) { | |
990 | desc->ext_prop_len -= ext_prop->data_len; | |
991 | ext_prop->data_len <<= 1; | |
992 | ext_prop->data_len += 2; | |
993 | desc->ext_prop_len += ext_prop->data_len; | |
994 | } | |
995 | if (desc->opts_mutex) | |
996 | mutex_unlock(desc->opts_mutex); | |
997 | return ret_len; | |
998 | } | |
999 | ||
45b6a73f CH |
1000 | CONFIGFS_ATTR(ext_prop_, type); |
1001 | CONFIGFS_ATTR(ext_prop_, data); | |
7419485f AP |
1002 | |
1003 | static struct configfs_attribute *ext_prop_attrs[] = { | |
45b6a73f CH |
1004 | &ext_prop_attr_type, |
1005 | &ext_prop_attr_data, | |
7419485f AP |
1006 | NULL, |
1007 | }; | |
1008 | ||
1009 | static void usb_os_desc_ext_prop_release(struct config_item *item) | |
1010 | { | |
1011 | struct usb_os_desc_ext_prop *ext_prop = to_usb_os_desc_ext_prop(item); | |
1012 | ||
1013 | kfree(ext_prop); /* frees a whole chunk */ | |
1014 | } | |
1015 | ||
1016 | static struct configfs_item_operations ext_prop_ops = { | |
1017 | .release = usb_os_desc_ext_prop_release, | |
7419485f AP |
1018 | }; |
1019 | ||
1020 | static struct config_item *ext_prop_make( | |
1021 | struct config_group *group, | |
1022 | const char *name) | |
1023 | { | |
1024 | struct usb_os_desc_ext_prop *ext_prop; | |
1025 | struct config_item_type *ext_prop_type; | |
1026 | struct usb_os_desc *desc; | |
1027 | char *vlabuf; | |
1028 | ||
1029 | vla_group(data_chunk); | |
1030 | vla_item(data_chunk, struct usb_os_desc_ext_prop, ext_prop, 1); | |
1031 | vla_item(data_chunk, struct config_item_type, ext_prop_type, 1); | |
1032 | ||
1033 | vlabuf = kzalloc(vla_group_size(data_chunk), GFP_KERNEL); | |
1034 | if (!vlabuf) | |
1035 | return ERR_PTR(-ENOMEM); | |
1036 | ||
1037 | ext_prop = vla_ptr(vlabuf, data_chunk, ext_prop); | |
1038 | ext_prop_type = vla_ptr(vlabuf, data_chunk, ext_prop_type); | |
1039 | ||
1040 | desc = container_of(group, struct usb_os_desc, group); | |
1041 | ext_prop_type->ct_item_ops = &ext_prop_ops; | |
1042 | ext_prop_type->ct_attrs = ext_prop_attrs; | |
1043 | ext_prop_type->ct_owner = desc->owner; | |
1044 | ||
1045 | config_item_init_type_name(&ext_prop->item, name, ext_prop_type); | |
1046 | ||
1047 | ext_prop->name = kstrdup(name, GFP_KERNEL); | |
1048 | if (!ext_prop->name) { | |
1049 | kfree(vlabuf); | |
1050 | return ERR_PTR(-ENOMEM); | |
1051 | } | |
1052 | desc->ext_prop_len += 14; | |
1053 | ext_prop->name_len = 2 * strlen(ext_prop->name) + 2; | |
1054 | if (desc->opts_mutex) | |
1055 | mutex_lock(desc->opts_mutex); | |
1056 | desc->ext_prop_len += ext_prop->name_len; | |
1057 | list_add_tail(&ext_prop->entry, &desc->ext_prop); | |
1058 | ++desc->ext_prop_count; | |
1059 | if (desc->opts_mutex) | |
1060 | mutex_unlock(desc->opts_mutex); | |
1061 | ||
1062 | return &ext_prop->item; | |
1063 | } | |
1064 | ||
1065 | static void ext_prop_drop(struct config_group *group, struct config_item *item) | |
1066 | { | |
1067 | struct usb_os_desc_ext_prop *ext_prop = to_usb_os_desc_ext_prop(item); | |
1068 | struct usb_os_desc *desc = to_usb_os_desc(&group->cg_item); | |
1069 | ||
1070 | if (desc->opts_mutex) | |
1071 | mutex_lock(desc->opts_mutex); | |
1072 | list_del(&ext_prop->entry); | |
1073 | --desc->ext_prop_count; | |
1074 | kfree(ext_prop->name); | |
1075 | desc->ext_prop_len -= (ext_prop->name_len + ext_prop->data_len + 14); | |
1076 | if (desc->opts_mutex) | |
1077 | mutex_unlock(desc->opts_mutex); | |
1078 | config_item_put(item); | |
1079 | } | |
1080 | ||
1081 | static struct configfs_group_operations interf_grp_ops = { | |
1082 | .make_item = &ext_prop_make, | |
1083 | .drop_item = &ext_prop_drop, | |
1084 | }; | |
1085 | ||
45b6a73f | 1086 | static ssize_t interf_grp_compatible_id_show(struct config_item *item, |
fe00b138 | 1087 | char *page) |
da424314 | 1088 | { |
45b6a73f | 1089 | memcpy(page, to_usb_os_desc(item)->ext_compat_id, 8); |
da424314 AP |
1090 | return 8; |
1091 | } | |
1092 | ||
45b6a73f | 1093 | static ssize_t interf_grp_compatible_id_store(struct config_item *item, |
fe00b138 | 1094 | const char *page, size_t len) |
da424314 | 1095 | { |
45b6a73f | 1096 | struct usb_os_desc *desc = to_usb_os_desc(item); |
da424314 AP |
1097 | int l; |
1098 | ||
1099 | l = min_t(int, 8, len); | |
1100 | if (page[l - 1] == '\n') | |
1101 | --l; | |
1102 | if (desc->opts_mutex) | |
1103 | mutex_lock(desc->opts_mutex); | |
1104 | memcpy(desc->ext_compat_id, page, l); | |
da424314 AP |
1105 | |
1106 | if (desc->opts_mutex) | |
1107 | mutex_unlock(desc->opts_mutex); | |
1108 | ||
1109 | return len; | |
1110 | } | |
1111 | ||
45b6a73f | 1112 | static ssize_t interf_grp_sub_compatible_id_show(struct config_item *item, |
fe00b138 | 1113 | char *page) |
da424314 | 1114 | { |
45b6a73f | 1115 | memcpy(page, to_usb_os_desc(item)->ext_compat_id + 8, 8); |
da424314 AP |
1116 | return 8; |
1117 | } | |
1118 | ||
45b6a73f | 1119 | static ssize_t interf_grp_sub_compatible_id_store(struct config_item *item, |
fe00b138 | 1120 | const char *page, size_t len) |
da424314 | 1121 | { |
45b6a73f | 1122 | struct usb_os_desc *desc = to_usb_os_desc(item); |
da424314 AP |
1123 | int l; |
1124 | ||
1125 | l = min_t(int, 8, len); | |
1126 | if (page[l - 1] == '\n') | |
1127 | --l; | |
1128 | if (desc->opts_mutex) | |
1129 | mutex_lock(desc->opts_mutex); | |
1130 | memcpy(desc->ext_compat_id + 8, page, l); | |
da424314 AP |
1131 | |
1132 | if (desc->opts_mutex) | |
1133 | mutex_unlock(desc->opts_mutex); | |
1134 | ||
1135 | return len; | |
1136 | } | |
1137 | ||
45b6a73f CH |
1138 | CONFIGFS_ATTR(interf_grp_, compatible_id); |
1139 | CONFIGFS_ATTR(interf_grp_, sub_compatible_id); | |
da424314 AP |
1140 | |
1141 | static struct configfs_attribute *interf_grp_attrs[] = { | |
45b6a73f CH |
1142 | &interf_grp_attr_compatible_id, |
1143 | &interf_grp_attr_sub_compatible_id, | |
da424314 AP |
1144 | NULL |
1145 | }; | |
1146 | ||
ff74745e AG |
1147 | struct config_group *usb_os_desc_prepare_interf_dir( |
1148 | struct config_group *parent, | |
1149 | int n_interf, | |
1150 | struct usb_os_desc **desc, | |
1151 | char **names, | |
1152 | struct module *owner) | |
da424314 | 1153 | { |
1ae1602d | 1154 | struct config_group *os_desc_group; |
da424314 AP |
1155 | struct config_item_type *os_desc_type, *interface_type; |
1156 | ||
1157 | vla_group(data_chunk); | |
da424314 | 1158 | vla_item(data_chunk, struct config_group, os_desc_group, 1); |
da424314 AP |
1159 | vla_item(data_chunk, struct config_item_type, os_desc_type, 1); |
1160 | vla_item(data_chunk, struct config_item_type, interface_type, 1); | |
1161 | ||
1162 | char *vlabuf = kzalloc(vla_group_size(data_chunk), GFP_KERNEL); | |
1163 | if (!vlabuf) | |
ff74745e | 1164 | return ERR_PTR(-ENOMEM); |
da424314 | 1165 | |
da424314 AP |
1166 | os_desc_group = vla_ptr(vlabuf, data_chunk, os_desc_group); |
1167 | os_desc_type = vla_ptr(vlabuf, data_chunk, os_desc_type); | |
da424314 AP |
1168 | interface_type = vla_ptr(vlabuf, data_chunk, interface_type); |
1169 | ||
da424314 AP |
1170 | os_desc_type->ct_owner = owner; |
1171 | config_group_init_type_name(os_desc_group, "os_desc", os_desc_type); | |
1ae1602d | 1172 | configfs_add_default_group(os_desc_group, parent); |
da424314 | 1173 | |
7419485f | 1174 | interface_type->ct_group_ops = &interf_grp_ops; |
da424314 AP |
1175 | interface_type->ct_attrs = interf_grp_attrs; |
1176 | interface_type->ct_owner = owner; | |
1177 | ||
1178 | while (n_interf--) { | |
1179 | struct usb_os_desc *d; | |
1180 | ||
1181 | d = desc[n_interf]; | |
7419485f | 1182 | d->owner = owner; |
da424314 | 1183 | config_group_init_type_name(&d->group, "", interface_type); |
14574b54 AP |
1184 | config_item_set_name(&d->group.cg_item, "interface.%s", |
1185 | names[n_interf]); | |
1ae1602d | 1186 | configfs_add_default_group(&d->group, os_desc_group); |
da424314 AP |
1187 | } |
1188 | ||
ff74745e | 1189 | return os_desc_group; |
da424314 AP |
1190 | } |
1191 | EXPORT_SYMBOL(usb_os_desc_prepare_interf_dir); | |
1192 | ||
88af8bbe SAS |
1193 | static int configfs_do_nothing(struct usb_composite_dev *cdev) |
1194 | { | |
75bfe23a | 1195 | WARN_ON(1); |
88af8bbe SAS |
1196 | return -EINVAL; |
1197 | } | |
1198 | ||
1199 | int composite_dev_prepare(struct usb_composite_driver *composite, | |
1200 | struct usb_composite_dev *dev); | |
1201 | ||
da424314 AP |
1202 | int composite_os_desc_req_prepare(struct usb_composite_dev *cdev, |
1203 | struct usb_ep *ep0); | |
1204 | ||
88af8bbe SAS |
1205 | static void purge_configs_funcs(struct gadget_info *gi) |
1206 | { | |
1207 | struct usb_configuration *c; | |
1208 | ||
1209 | list_for_each_entry(c, &gi->cdev.configs, list) { | |
1210 | struct usb_function *f, *tmp; | |
1211 | struct config_usb_cfg *cfg; | |
1212 | ||
1213 | cfg = container_of(c, struct config_usb_cfg, c); | |
1214 | ||
1215 | list_for_each_entry_safe(f, tmp, &c->functions, list) { | |
1216 | ||
1217 | list_move_tail(&f->list, &cfg->func_list); | |
1218 | if (f->unbind) { | |
da7b895d | 1219 | dev_dbg(&gi->cdev.gadget->dev, |
a08f5dbf RI |
1220 | "unbind function '%s'/%p\n", |
1221 | f->name, f); | |
88af8bbe SAS |
1222 | f->unbind(c, f); |
1223 | } | |
1224 | } | |
1225 | c->next_interface_id = 0; | |
903124fe | 1226 | memset(c->interface, 0, sizeof(c->interface)); |
554eead5 | 1227 | c->superspeed_plus = 0; |
88af8bbe SAS |
1228 | c->superspeed = 0; |
1229 | c->highspeed = 0; | |
1230 | c->fullspeed = 0; | |
1231 | } | |
1232 | } | |
1233 | ||
1234 | static int configfs_composite_bind(struct usb_gadget *gadget, | |
1235 | struct usb_gadget_driver *gdriver) | |
1236 | { | |
1237 | struct usb_composite_driver *composite = to_cdriver(gdriver); | |
1238 | struct gadget_info *gi = container_of(composite, | |
1239 | struct gadget_info, composite); | |
1240 | struct usb_composite_dev *cdev = &gi->cdev; | |
1241 | struct usb_configuration *c; | |
1242 | struct usb_string *s; | |
1243 | unsigned i; | |
1244 | int ret; | |
1245 | ||
1246 | /* the gi->lock is hold by the caller */ | |
1247 | cdev->gadget = gadget; | |
1248 | set_gadget_data(gadget, cdev); | |
1249 | ret = composite_dev_prepare(composite, cdev); | |
1250 | if (ret) | |
1251 | return ret; | |
1252 | /* and now the gadget bind */ | |
1253 | ret = -EINVAL; | |
1254 | ||
1255 | if (list_empty(&gi->cdev.configs)) { | |
4d9f872c | 1256 | pr_err("Need at least one configuration in %s.\n", |
88af8bbe SAS |
1257 | gi->composite.name); |
1258 | goto err_comp_cleanup; | |
1259 | } | |
1260 | ||
1261 | ||
1262 | list_for_each_entry(c, &gi->cdev.configs, list) { | |
1263 | struct config_usb_cfg *cfg; | |
1264 | ||
1265 | cfg = container_of(c, struct config_usb_cfg, c); | |
1266 | if (list_empty(&cfg->func_list)) { | |
4d9f872c | 1267 | pr_err("Config %s/%d of %s needs at least one function.\n", |
88af8bbe SAS |
1268 | c->label, c->bConfigurationValue, |
1269 | gi->composite.name); | |
1270 | goto err_comp_cleanup; | |
1271 | } | |
1272 | } | |
1273 | ||
1274 | /* init all strings */ | |
1275 | if (!list_empty(&gi->string_list)) { | |
1276 | struct gadget_strings *gs; | |
1277 | ||
1278 | i = 0; | |
1279 | list_for_each_entry(gs, &gi->string_list, list) { | |
1280 | ||
1281 | gi->gstrings[i] = &gs->stringtab_dev; | |
1282 | gs->stringtab_dev.strings = gs->strings; | |
1283 | gs->strings[USB_GADGET_MANUFACTURER_IDX].s = | |
1284 | gs->manufacturer; | |
1285 | gs->strings[USB_GADGET_PRODUCT_IDX].s = gs->product; | |
1286 | gs->strings[USB_GADGET_SERIAL_IDX].s = gs->serialnumber; | |
1287 | i++; | |
1288 | } | |
1289 | gi->gstrings[i] = NULL; | |
1290 | s = usb_gstrings_attach(&gi->cdev, gi->gstrings, | |
1291 | USB_GADGET_FIRST_AVAIL_IDX); | |
fea77077 WY |
1292 | if (IS_ERR(s)) { |
1293 | ret = PTR_ERR(s); | |
88af8bbe | 1294 | goto err_comp_cleanup; |
fea77077 | 1295 | } |
88af8bbe SAS |
1296 | |
1297 | gi->cdev.desc.iManufacturer = s[USB_GADGET_MANUFACTURER_IDX].id; | |
1298 | gi->cdev.desc.iProduct = s[USB_GADGET_PRODUCT_IDX].id; | |
1299 | gi->cdev.desc.iSerialNumber = s[USB_GADGET_SERIAL_IDX].id; | |
1300 | } | |
1301 | ||
87213d38 AP |
1302 | if (gi->use_os_desc) { |
1303 | cdev->use_os_string = true; | |
1304 | cdev->b_vendor_code = gi->b_vendor_code; | |
1305 | memcpy(cdev->qw_sign, gi->qw_sign, OS_STRING_QW_SIGN_LEN); | |
1306 | } | |
1307 | ||
41ce84c8 LJ |
1308 | if (gadget_is_otg(gadget) && !otg_desc[0]) { |
1309 | struct usb_descriptor_header *usb_desc; | |
1310 | ||
1311 | usb_desc = usb_otg_descriptor_alloc(gadget); | |
1312 | if (!usb_desc) { | |
1313 | ret = -ENOMEM; | |
1314 | goto err_comp_cleanup; | |
1315 | } | |
1316 | usb_otg_descriptor_init(gadget, usb_desc); | |
1317 | otg_desc[0] = usb_desc; | |
1318 | otg_desc[1] = NULL; | |
1319 | } | |
1320 | ||
88af8bbe SAS |
1321 | /* Go through all configs, attach all functions */ |
1322 | list_for_each_entry(c, &gi->cdev.configs, list) { | |
1323 | struct config_usb_cfg *cfg; | |
1324 | struct usb_function *f; | |
1325 | struct usb_function *tmp; | |
1326 | struct gadget_config_name *cn; | |
1327 | ||
41ce84c8 LJ |
1328 | if (gadget_is_otg(gadget)) |
1329 | c->descriptors = otg_desc; | |
1330 | ||
88af8bbe SAS |
1331 | cfg = container_of(c, struct config_usb_cfg, c); |
1332 | if (!list_empty(&cfg->string_list)) { | |
1333 | i = 0; | |
1334 | list_for_each_entry(cn, &cfg->string_list, list) { | |
1335 | cfg->gstrings[i] = &cn->stringtab_dev; | |
1336 | cn->stringtab_dev.strings = &cn->strings; | |
1337 | cn->strings.s = cn->configuration; | |
1338 | i++; | |
1339 | } | |
1340 | cfg->gstrings[i] = NULL; | |
1341 | s = usb_gstrings_attach(&gi->cdev, cfg->gstrings, 1); | |
fea77077 WY |
1342 | if (IS_ERR(s)) { |
1343 | ret = PTR_ERR(s); | |
88af8bbe | 1344 | goto err_comp_cleanup; |
fea77077 | 1345 | } |
88af8bbe SAS |
1346 | c->iConfiguration = s[0].id; |
1347 | } | |
1348 | ||
1349 | list_for_each_entry_safe(f, tmp, &cfg->func_list, list) { | |
1350 | list_del(&f->list); | |
1351 | ret = usb_add_function(c, f); | |
5a68e9b5 AP |
1352 | if (ret) { |
1353 | list_add(&f->list, &cfg->func_list); | |
88af8bbe | 1354 | goto err_purge_funcs; |
5a68e9b5 | 1355 | } |
88af8bbe SAS |
1356 | } |
1357 | usb_ep_autoconfig_reset(cdev->gadget); | |
1358 | } | |
da424314 AP |
1359 | if (cdev->use_os_string) { |
1360 | ret = composite_os_desc_req_prepare(cdev, gadget->ep0); | |
1361 | if (ret) | |
1362 | goto err_purge_funcs; | |
1363 | } | |
1364 | ||
88af8bbe SAS |
1365 | usb_ep_autoconfig_reset(cdev->gadget); |
1366 | return 0; | |
1367 | ||
1368 | err_purge_funcs: | |
1369 | purge_configs_funcs(gi); | |
1370 | err_comp_cleanup: | |
1371 | composite_dev_cleanup(cdev); | |
1372 | return ret; | |
1373 | } | |
1374 | ||
1375 | static void configfs_composite_unbind(struct usb_gadget *gadget) | |
1376 | { | |
1377 | struct usb_composite_dev *cdev; | |
1378 | struct gadget_info *gi; | |
1379 | ||
1380 | /* the gi->lock is hold by the caller */ | |
1381 | ||
1382 | cdev = get_gadget_data(gadget); | |
1383 | gi = container_of(cdev, struct gadget_info, cdev); | |
1384 | ||
41ce84c8 LJ |
1385 | kfree(otg_desc[0]); |
1386 | otg_desc[0] = NULL; | |
88af8bbe SAS |
1387 | purge_configs_funcs(gi); |
1388 | composite_dev_cleanup(cdev); | |
1389 | usb_ep_autoconfig_reset(cdev->gadget); | |
1390 | cdev->gadget = NULL; | |
1391 | set_gadget_data(gadget, NULL); | |
1392 | } | |
1393 | ||
1394 | static const struct usb_gadget_driver configfs_driver_template = { | |
1395 | .bind = configfs_composite_bind, | |
1396 | .unbind = configfs_composite_unbind, | |
1397 | ||
1398 | .setup = composite_setup, | |
02f751b4 | 1399 | .reset = composite_disconnect, |
88af8bbe SAS |
1400 | .disconnect = composite_disconnect, |
1401 | ||
3a571870 AP |
1402 | .suspend = composite_suspend, |
1403 | .resume = composite_resume, | |
1404 | ||
88af8bbe SAS |
1405 | .max_speed = USB_SPEED_SUPER, |
1406 | .driver = { | |
1407 | .owner = THIS_MODULE, | |
1408 | .name = "configfs-gadget", | |
1409 | }, | |
f1bddbb3 | 1410 | .match_existing_only = 1, |
88af8bbe SAS |
1411 | }; |
1412 | ||
1413 | static struct config_group *gadgets_make( | |
1414 | struct config_group *group, | |
1415 | const char *name) | |
1416 | { | |
1417 | struct gadget_info *gi; | |
1418 | ||
1419 | gi = kzalloc(sizeof(*gi), GFP_KERNEL); | |
1420 | if (!gi) | |
1421 | return ERR_PTR(-ENOMEM); | |
1422 | ||
1ae1602d | 1423 | config_group_init_type_name(&gi->group, name, &gadget_root_type); |
88af8bbe SAS |
1424 | |
1425 | config_group_init_type_name(&gi->functions_group, "functions", | |
1426 | &functions_type); | |
1ae1602d CH |
1427 | configfs_add_default_group(&gi->functions_group, &gi->group); |
1428 | ||
88af8bbe SAS |
1429 | config_group_init_type_name(&gi->configs_group, "configs", |
1430 | &config_desc_type); | |
1ae1602d CH |
1431 | configfs_add_default_group(&gi->configs_group, &gi->group); |
1432 | ||
88af8bbe SAS |
1433 | config_group_init_type_name(&gi->strings_group, "strings", |
1434 | &gadget_strings_strings_type); | |
1ae1602d CH |
1435 | configfs_add_default_group(&gi->strings_group, &gi->group); |
1436 | ||
87213d38 AP |
1437 | config_group_init_type_name(&gi->os_desc_group, "os_desc", |
1438 | &os_desc_type); | |
1ae1602d | 1439 | configfs_add_default_group(&gi->os_desc_group, &gi->group); |
88af8bbe SAS |
1440 | |
1441 | gi->composite.bind = configfs_do_nothing; | |
1442 | gi->composite.unbind = configfs_do_nothing; | |
1443 | gi->composite.suspend = NULL; | |
1444 | gi->composite.resume = NULL; | |
1445 | gi->composite.max_speed = USB_SPEED_SUPER; | |
1446 | ||
1447 | mutex_init(&gi->lock); | |
1448 | INIT_LIST_HEAD(&gi->string_list); | |
1449 | INIT_LIST_HEAD(&gi->available_func); | |
1450 | ||
1451 | composite_init_dev(&gi->cdev); | |
1452 | gi->cdev.desc.bLength = USB_DT_DEVICE_SIZE; | |
1453 | gi->cdev.desc.bDescriptorType = USB_DT_DEVICE; | |
1454 | gi->cdev.desc.bcdDevice = cpu_to_le16(get_default_bcdDevice()); | |
1455 | ||
1456 | gi->composite.gadget_driver = configfs_driver_template; | |
1457 | ||
1458 | gi->composite.gadget_driver.function = kstrdup(name, GFP_KERNEL); | |
1459 | gi->composite.name = gi->composite.gadget_driver.function; | |
1460 | ||
1461 | if (!gi->composite.gadget_driver.function) | |
1462 | goto err; | |
1463 | ||
88af8bbe SAS |
1464 | return &gi->group; |
1465 | err: | |
1466 | kfree(gi); | |
1467 | return ERR_PTR(-ENOMEM); | |
1468 | } | |
1469 | ||
1470 | static void gadgets_drop(struct config_group *group, struct config_item *item) | |
1471 | { | |
1472 | config_item_put(item); | |
1473 | } | |
1474 | ||
1475 | static struct configfs_group_operations gadgets_ops = { | |
1476 | .make_group = &gadgets_make, | |
1477 | .drop_item = &gadgets_drop, | |
1478 | }; | |
1479 | ||
4ad01412 | 1480 | static const struct config_item_type gadgets_type = { |
88af8bbe SAS |
1481 | .ct_group_ops = &gadgets_ops, |
1482 | .ct_owner = THIS_MODULE, | |
1483 | }; | |
1484 | ||
1485 | static struct configfs_subsystem gadget_subsys = { | |
1486 | .su_group = { | |
1487 | .cg_item = { | |
1488 | .ci_namebuf = "usb_gadget", | |
1489 | .ci_type = &gadgets_type, | |
1490 | }, | |
1491 | }, | |
1492 | .su_mutex = __MUTEX_INITIALIZER(gadget_subsys.su_mutex), | |
1493 | }; | |
1494 | ||
092a4bd0 AP |
1495 | void unregister_gadget_item(struct config_item *item) |
1496 | { | |
1497 | struct gadget_info *gi = to_gadget_info(item); | |
1498 | ||
cee51c33 | 1499 | mutex_lock(&gi->lock); |
092a4bd0 | 1500 | unregister_gadget(gi); |
cee51c33 | 1501 | mutex_unlock(&gi->lock); |
092a4bd0 | 1502 | } |
0700faaf | 1503 | EXPORT_SYMBOL_GPL(unregister_gadget_item); |
092a4bd0 | 1504 | |
88af8bbe SAS |
1505 | static int __init gadget_cfs_init(void) |
1506 | { | |
1507 | int ret; | |
1508 | ||
1509 | config_group_init(&gadget_subsys.su_group); | |
1510 | ||
1511 | ret = configfs_register_subsystem(&gadget_subsys); | |
1512 | return ret; | |
1513 | } | |
1514 | module_init(gadget_cfs_init); | |
1515 | ||
1516 | static void __exit gadget_cfs_exit(void) | |
1517 | { | |
1518 | configfs_unregister_subsystem(&gadget_subsys); | |
1519 | } | |
1520 | module_exit(gadget_cfs_exit); |