Commit | Line | Data |
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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 | ||
41ce84c8 LJ |
44 | static const struct usb_descriptor_header *otg_desc[2]; |
45 | ||
88af8bbe SAS |
46 | struct gadget_info { |
47 | struct config_group group; | |
48 | struct config_group functions_group; | |
49 | struct config_group configs_group; | |
50 | struct config_group strings_group; | |
87213d38 | 51 | struct config_group os_desc_group; |
88af8bbe SAS |
52 | |
53 | struct mutex lock; | |
54 | struct usb_gadget_strings *gstrings[MAX_USB_STRING_LANGS + 1]; | |
55 | struct list_head string_list; | |
56 | struct list_head available_func; | |
57 | ||
88af8bbe SAS |
58 | struct usb_composite_driver composite; |
59 | struct usb_composite_dev cdev; | |
87213d38 AP |
60 | bool use_os_desc; |
61 | char b_vendor_code; | |
62 | char qw_sign[OS_STRING_QW_SIGN_LEN]; | |
88af8bbe SAS |
63 | }; |
64 | ||
45b6a73f CH |
65 | static inline struct gadget_info *to_gadget_info(struct config_item *item) |
66 | { | |
67 | return container_of(to_config_group(item), struct gadget_info, group); | |
68 | } | |
69 | ||
88af8bbe SAS |
70 | struct config_usb_cfg { |
71 | struct config_group group; | |
72 | struct config_group strings_group; | |
88af8bbe SAS |
73 | struct list_head string_list; |
74 | struct usb_configuration c; | |
75 | struct list_head func_list; | |
76 | struct usb_gadget_strings *gstrings[MAX_USB_STRING_LANGS + 1]; | |
77 | }; | |
78 | ||
45b6a73f CH |
79 | static inline struct config_usb_cfg *to_config_usb_cfg(struct config_item *item) |
80 | { | |
81 | return container_of(to_config_group(item), struct config_usb_cfg, | |
82 | group); | |
83 | } | |
84 | ||
88af8bbe SAS |
85 | struct gadget_strings { |
86 | struct usb_gadget_strings stringtab_dev; | |
87 | struct usb_string strings[USB_GADGET_FIRST_AVAIL_IDX]; | |
88 | char *manufacturer; | |
89 | char *product; | |
90 | char *serialnumber; | |
91 | ||
92 | struct config_group group; | |
93 | struct list_head list; | |
94 | }; | |
95 | ||
87213d38 AP |
96 | struct os_desc { |
97 | struct config_group group; | |
98 | }; | |
99 | ||
88af8bbe SAS |
100 | struct gadget_config_name { |
101 | struct usb_gadget_strings stringtab_dev; | |
102 | struct usb_string strings; | |
103 | char *configuration; | |
104 | ||
105 | struct config_group group; | |
106 | struct list_head list; | |
107 | }; | |
108 | ||
109 | static int usb_string_copy(const char *s, char **s_copy) | |
110 | { | |
111 | int ret; | |
112 | char *str; | |
113 | char *copy = *s_copy; | |
114 | ret = strlen(s); | |
115 | if (ret > 126) | |
116 | return -EOVERFLOW; | |
117 | ||
118 | str = kstrdup(s, GFP_KERNEL); | |
119 | if (!str) | |
120 | return -ENOMEM; | |
121 | if (str[ret - 1] == '\n') | |
122 | str[ret - 1] = '\0'; | |
123 | kfree(copy); | |
124 | *s_copy = str; | |
125 | return 0; | |
126 | } | |
127 | ||
88af8bbe | 128 | #define GI_DEVICE_DESC_SIMPLE_R_u8(__name) \ |
45b6a73f | 129 | static ssize_t gadget_dev_desc_##__name##_show(struct config_item *item, \ |
88af8bbe SAS |
130 | char *page) \ |
131 | { \ | |
45b6a73f CH |
132 | return sprintf(page, "0x%02x\n", \ |
133 | to_gadget_info(item)->cdev.desc.__name); \ | |
88af8bbe SAS |
134 | } |
135 | ||
136 | #define GI_DEVICE_DESC_SIMPLE_R_u16(__name) \ | |
45b6a73f | 137 | static ssize_t gadget_dev_desc_##__name##_show(struct config_item *item, \ |
88af8bbe SAS |
138 | char *page) \ |
139 | { \ | |
45b6a73f CH |
140 | return sprintf(page, "0x%04x\n", \ |
141 | le16_to_cpup(&to_gadget_info(item)->cdev.desc.__name)); \ | |
88af8bbe SAS |
142 | } |
143 | ||
144 | ||
145 | #define GI_DEVICE_DESC_SIMPLE_W_u8(_name) \ | |
45b6a73f | 146 | static ssize_t gadget_dev_desc_##_name##_store(struct config_item *item, \ |
88af8bbe SAS |
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; \ | |
45b6a73f | 154 | to_gadget_info(item)->cdev.desc._name = val; \ |
88af8bbe SAS |
155 | return len; \ |
156 | } | |
157 | ||
158 | #define GI_DEVICE_DESC_SIMPLE_W_u16(_name) \ | |
45b6a73f | 159 | static ssize_t gadget_dev_desc_##_name##_store(struct config_item *item, \ |
88af8bbe SAS |
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; \ | |
45b6a73f | 167 | to_gadget_info(item)->cdev.desc._name = cpu_to_le16p(&val); \ |
88af8bbe SAS |
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 | ||
45b6a73f | 197 | static ssize_t gadget_dev_desc_bcdDevice_store(struct config_item *item, |
88af8bbe SAS |
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 | ||
45b6a73f | 210 | to_gadget_info(item)->cdev.desc.bcdDevice = cpu_to_le16(bcdDevice); |
88af8bbe SAS |
211 | return len; |
212 | } | |
213 | ||
45b6a73f | 214 | static ssize_t gadget_dev_desc_bcdUSB_store(struct config_item *item, |
88af8bbe SAS |
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 | ||
45b6a73f | 227 | to_gadget_info(item)->cdev.desc.bcdUSB = cpu_to_le16(bcdUSB); |
88af8bbe SAS |
228 | return len; |
229 | } | |
230 | ||
45b6a73f | 231 | static ssize_t gadget_dev_desc_UDC_show(struct config_item *item, char *page) |
88af8bbe | 232 | { |
afdaadc3 RB |
233 | char *udc_name = to_gadget_info(item)->composite.gadget_driver.udc_name; |
234 | ||
235 | return sprintf(page, "%s\n", udc_name ?: ""); | |
88af8bbe SAS |
236 | } |
237 | ||
238 | static int unregister_gadget(struct gadget_info *gi) | |
239 | { | |
240 | int ret; | |
241 | ||
afdaadc3 | 242 | if (!gi->composite.gadget_driver.udc_name) |
88af8bbe SAS |
243 | return -ENODEV; |
244 | ||
245 | ret = usb_gadget_unregister_driver(&gi->composite.gadget_driver); | |
246 | if (ret) | |
247 | return ret; | |
afdaadc3 RB |
248 | kfree(gi->composite.gadget_driver.udc_name); |
249 | gi->composite.gadget_driver.udc_name = NULL; | |
88af8bbe SAS |
250 | return 0; |
251 | } | |
252 | ||
45b6a73f | 253 | static ssize_t gadget_dev_desc_UDC_store(struct config_item *item, |
88af8bbe SAS |
254 | const char *page, size_t len) |
255 | { | |
45b6a73f | 256 | struct gadget_info *gi = to_gadget_info(item); |
88af8bbe SAS |
257 | char *name; |
258 | int ret; | |
259 | ||
260 | name = kstrdup(page, GFP_KERNEL); | |
261 | if (!name) | |
262 | return -ENOMEM; | |
263 | if (name[len - 1] == '\n') | |
264 | name[len - 1] = '\0'; | |
265 | ||
266 | mutex_lock(&gi->lock); | |
267 | ||
268 | if (!strlen(name)) { | |
269 | ret = unregister_gadget(gi); | |
270 | if (ret) | |
271 | goto err; | |
272 | } else { | |
afdaadc3 | 273 | if (gi->composite.gadget_driver.udc_name) { |
88af8bbe SAS |
274 | ret = -EBUSY; |
275 | goto err; | |
276 | } | |
afdaadc3 RB |
277 | gi->composite.gadget_driver.udc_name = name; |
278 | ret = usb_gadget_probe_driver(&gi->composite.gadget_driver); | |
279 | if (ret) { | |
280 | gi->composite.gadget_driver.udc_name = NULL; | |
88af8bbe | 281 | goto err; |
afdaadc3 | 282 | } |
88af8bbe SAS |
283 | } |
284 | mutex_unlock(&gi->lock); | |
285 | return len; | |
286 | err: | |
287 | kfree(name); | |
288 | mutex_unlock(&gi->lock); | |
289 | return ret; | |
290 | } | |
291 | ||
45b6a73f CH |
292 | CONFIGFS_ATTR(gadget_dev_desc_, bDeviceClass); |
293 | CONFIGFS_ATTR(gadget_dev_desc_, bDeviceSubClass); | |
294 | CONFIGFS_ATTR(gadget_dev_desc_, bDeviceProtocol); | |
295 | CONFIGFS_ATTR(gadget_dev_desc_, bMaxPacketSize0); | |
296 | CONFIGFS_ATTR(gadget_dev_desc_, idVendor); | |
297 | CONFIGFS_ATTR(gadget_dev_desc_, idProduct); | |
298 | CONFIGFS_ATTR(gadget_dev_desc_, bcdDevice); | |
299 | CONFIGFS_ATTR(gadget_dev_desc_, bcdUSB); | |
300 | CONFIGFS_ATTR(gadget_dev_desc_, UDC); | |
88af8bbe SAS |
301 | |
302 | static struct configfs_attribute *gadget_root_attrs[] = { | |
45b6a73f CH |
303 | &gadget_dev_desc_attr_bDeviceClass, |
304 | &gadget_dev_desc_attr_bDeviceSubClass, | |
305 | &gadget_dev_desc_attr_bDeviceProtocol, | |
306 | &gadget_dev_desc_attr_bMaxPacketSize0, | |
307 | &gadget_dev_desc_attr_idVendor, | |
308 | &gadget_dev_desc_attr_idProduct, | |
309 | &gadget_dev_desc_attr_bcdDevice, | |
310 | &gadget_dev_desc_attr_bcdUSB, | |
311 | &gadget_dev_desc_attr_UDC, | |
88af8bbe SAS |
312 | NULL, |
313 | }; | |
314 | ||
88af8bbe SAS |
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 | ||
88af8bbe SAS |
328 | static inline struct usb_function_instance *to_usb_function_instance( |
329 | struct config_item *item) | |
330 | { | |
331 | return container_of(to_config_group(item), | |
332 | struct usb_function_instance, group); | |
333 | } | |
334 | ||
335 | static void gadget_info_attr_release(struct config_item *item) | |
336 | { | |
337 | struct gadget_info *gi = to_gadget_info(item); | |
338 | ||
339 | WARN_ON(!list_empty(&gi->cdev.configs)); | |
340 | WARN_ON(!list_empty(&gi->string_list)); | |
341 | WARN_ON(!list_empty(&gi->available_func)); | |
342 | kfree(gi->composite.gadget_driver.function); | |
343 | kfree(gi); | |
344 | } | |
345 | ||
88af8bbe SAS |
346 | static struct configfs_item_operations gadget_root_item_ops = { |
347 | .release = gadget_info_attr_release, | |
88af8bbe SAS |
348 | }; |
349 | ||
350 | static void gadget_config_attr_release(struct config_item *item) | |
351 | { | |
352 | struct config_usb_cfg *cfg = to_config_usb_cfg(item); | |
353 | ||
354 | WARN_ON(!list_empty(&cfg->c.functions)); | |
355 | list_del(&cfg->c.list); | |
356 | kfree(cfg->c.label); | |
357 | kfree(cfg); | |
358 | } | |
359 | ||
360 | static int config_usb_cfg_link( | |
361 | struct config_item *usb_cfg_ci, | |
362 | struct config_item *usb_func_ci) | |
363 | { | |
364 | struct config_usb_cfg *cfg = to_config_usb_cfg(usb_cfg_ci); | |
365 | struct usb_composite_dev *cdev = cfg->c.cdev; | |
366 | struct gadget_info *gi = container_of(cdev, struct gadget_info, cdev); | |
367 | ||
368 | struct config_group *group = to_config_group(usb_func_ci); | |
369 | struct usb_function_instance *fi = container_of(group, | |
370 | struct usb_function_instance, group); | |
371 | struct usb_function_instance *a_fi; | |
372 | struct usb_function *f; | |
373 | int ret; | |
374 | ||
375 | mutex_lock(&gi->lock); | |
376 | /* | |
377 | * Make sure this function is from within our _this_ gadget and not | |
378 | * from another gadget or a random directory. | |
379 | * Also a function instance can only be linked once. | |
380 | */ | |
381 | list_for_each_entry(a_fi, &gi->available_func, cfs_list) { | |
382 | if (a_fi == fi) | |
383 | break; | |
384 | } | |
385 | if (a_fi != fi) { | |
386 | ret = -EINVAL; | |
387 | goto out; | |
388 | } | |
389 | ||
390 | list_for_each_entry(f, &cfg->func_list, list) { | |
391 | if (f->fi == fi) { | |
392 | ret = -EEXIST; | |
393 | goto out; | |
394 | } | |
395 | } | |
396 | ||
397 | f = usb_get_function(fi); | |
398 | if (IS_ERR(f)) { | |
399 | ret = PTR_ERR(f); | |
400 | goto out; | |
401 | } | |
402 | ||
403 | /* stash the function until we bind it to the gadget */ | |
404 | list_add_tail(&f->list, &cfg->func_list); | |
405 | ret = 0; | |
406 | out: | |
407 | mutex_unlock(&gi->lock); | |
408 | return ret; | |
409 | } | |
410 | ||
411 | static int config_usb_cfg_unlink( | |
412 | struct config_item *usb_cfg_ci, | |
413 | struct config_item *usb_func_ci) | |
414 | { | |
415 | struct config_usb_cfg *cfg = to_config_usb_cfg(usb_cfg_ci); | |
416 | struct usb_composite_dev *cdev = cfg->c.cdev; | |
417 | struct gadget_info *gi = container_of(cdev, struct gadget_info, cdev); | |
418 | ||
419 | struct config_group *group = to_config_group(usb_func_ci); | |
420 | struct usb_function_instance *fi = container_of(group, | |
421 | struct usb_function_instance, group); | |
422 | struct usb_function *f; | |
423 | ||
424 | /* | |
425 | * ideally I would like to forbid to unlink functions while a gadget is | |
426 | * bound to an UDC. Since this isn't possible at the moment, we simply | |
427 | * force an unbind, the function is available here and then we can | |
428 | * remove the function. | |
429 | */ | |
430 | mutex_lock(&gi->lock); | |
afdaadc3 | 431 | if (gi->composite.gadget_driver.udc_name) |
88af8bbe | 432 | unregister_gadget(gi); |
afdaadc3 | 433 | WARN_ON(gi->composite.gadget_driver.udc_name); |
88af8bbe SAS |
434 | |
435 | list_for_each_entry(f, &cfg->func_list, list) { | |
436 | if (f->fi == fi) { | |
437 | list_del(&f->list); | |
438 | usb_put_function(f); | |
439 | mutex_unlock(&gi->lock); | |
440 | return 0; | |
441 | } | |
442 | } | |
443 | mutex_unlock(&gi->lock); | |
75bfe23a | 444 | WARN(1, "Unable to locate function to unbind\n"); |
88af8bbe SAS |
445 | return 0; |
446 | } | |
447 | ||
88af8bbe SAS |
448 | static struct configfs_item_operations gadget_config_item_ops = { |
449 | .release = gadget_config_attr_release, | |
88af8bbe SAS |
450 | .allow_link = config_usb_cfg_link, |
451 | .drop_link = config_usb_cfg_unlink, | |
452 | }; | |
453 | ||
454 | ||
45b6a73f | 455 | static ssize_t gadget_config_desc_MaxPower_show(struct config_item *item, |
88af8bbe SAS |
456 | char *page) |
457 | { | |
45b6a73f | 458 | return sprintf(page, "%u\n", to_config_usb_cfg(item)->c.MaxPower); |
88af8bbe SAS |
459 | } |
460 | ||
45b6a73f | 461 | static ssize_t gadget_config_desc_MaxPower_store(struct config_item *item, |
88af8bbe SAS |
462 | const char *page, size_t len) |
463 | { | |
464 | u16 val; | |
465 | int ret; | |
466 | ret = kstrtou16(page, 0, &val); | |
467 | if (ret) | |
468 | return ret; | |
469 | if (DIV_ROUND_UP(val, 8) > 0xff) | |
470 | return -ERANGE; | |
45b6a73f | 471 | to_config_usb_cfg(item)->c.MaxPower = val; |
88af8bbe SAS |
472 | return len; |
473 | } | |
474 | ||
45b6a73f | 475 | static ssize_t gadget_config_desc_bmAttributes_show(struct config_item *item, |
88af8bbe SAS |
476 | char *page) |
477 | { | |
45b6a73f CH |
478 | return sprintf(page, "0x%02x\n", |
479 | to_config_usb_cfg(item)->c.bmAttributes); | |
88af8bbe SAS |
480 | } |
481 | ||
45b6a73f | 482 | static ssize_t gadget_config_desc_bmAttributes_store(struct config_item *item, |
88af8bbe SAS |
483 | const char *page, size_t len) |
484 | { | |
485 | u8 val; | |
486 | int ret; | |
487 | ret = kstrtou8(page, 0, &val); | |
488 | if (ret) | |
489 | return ret; | |
490 | if (!(val & USB_CONFIG_ATT_ONE)) | |
491 | return -EINVAL; | |
492 | if (val & ~(USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER | | |
493 | USB_CONFIG_ATT_WAKEUP)) | |
494 | return -EINVAL; | |
45b6a73f | 495 | to_config_usb_cfg(item)->c.bmAttributes = val; |
88af8bbe SAS |
496 | return len; |
497 | } | |
498 | ||
45b6a73f CH |
499 | CONFIGFS_ATTR(gadget_config_desc_, MaxPower); |
500 | CONFIGFS_ATTR(gadget_config_desc_, bmAttributes); | |
88af8bbe SAS |
501 | |
502 | static struct configfs_attribute *gadget_config_attrs[] = { | |
45b6a73f CH |
503 | &gadget_config_desc_attr_MaxPower, |
504 | &gadget_config_desc_attr_bmAttributes, | |
88af8bbe SAS |
505 | NULL, |
506 | }; | |
507 | ||
508 | static struct config_item_type gadget_config_type = { | |
509 | .ct_item_ops = &gadget_config_item_ops, | |
510 | .ct_attrs = gadget_config_attrs, | |
511 | .ct_owner = THIS_MODULE, | |
512 | }; | |
513 | ||
514 | static struct config_item_type gadget_root_type = { | |
515 | .ct_item_ops = &gadget_root_item_ops, | |
516 | .ct_attrs = gadget_root_attrs, | |
517 | .ct_owner = THIS_MODULE, | |
518 | }; | |
519 | ||
520 | static void composite_init_dev(struct usb_composite_dev *cdev) | |
521 | { | |
522 | spin_lock_init(&cdev->lock); | |
523 | INIT_LIST_HEAD(&cdev->configs); | |
524 | INIT_LIST_HEAD(&cdev->gstrings); | |
525 | } | |
526 | ||
527 | static struct config_group *function_make( | |
528 | struct config_group *group, | |
529 | const char *name) | |
530 | { | |
531 | struct gadget_info *gi; | |
532 | struct usb_function_instance *fi; | |
533 | char buf[MAX_NAME_LEN]; | |
534 | char *func_name; | |
535 | char *instance_name; | |
536 | int ret; | |
537 | ||
538 | ret = snprintf(buf, MAX_NAME_LEN, "%s", name); | |
539 | if (ret >= MAX_NAME_LEN) | |
540 | return ERR_PTR(-ENAMETOOLONG); | |
541 | ||
542 | func_name = buf; | |
543 | instance_name = strchr(func_name, '.'); | |
544 | if (!instance_name) { | |
545 | pr_err("Unable to locate . in FUNC.INSTANCE\n"); | |
546 | return ERR_PTR(-EINVAL); | |
547 | } | |
548 | *instance_name = '\0'; | |
549 | instance_name++; | |
550 | ||
551 | fi = usb_get_function_instance(func_name); | |
552 | if (IS_ERR(fi)) | |
a3469411 | 553 | return ERR_CAST(fi); |
88af8bbe | 554 | |
3958b792 | 555 | ret = config_item_set_name(&fi->group.cg_item, "%s", name); |
88af8bbe SAS |
556 | if (ret) { |
557 | usb_put_function_instance(fi); | |
558 | return ERR_PTR(ret); | |
559 | } | |
1933861d AP |
560 | if (fi->set_inst_name) { |
561 | ret = fi->set_inst_name(fi, instance_name); | |
562 | if (ret) { | |
563 | usb_put_function_instance(fi); | |
564 | return ERR_PTR(ret); | |
565 | } | |
566 | } | |
88af8bbe SAS |
567 | |
568 | gi = container_of(group, struct gadget_info, functions_group); | |
569 | ||
570 | mutex_lock(&gi->lock); | |
571 | list_add_tail(&fi->cfs_list, &gi->available_func); | |
572 | mutex_unlock(&gi->lock); | |
573 | return &fi->group; | |
574 | } | |
575 | ||
576 | static void function_drop( | |
577 | struct config_group *group, | |
578 | struct config_item *item) | |
579 | { | |
580 | struct usb_function_instance *fi = to_usb_function_instance(item); | |
581 | struct gadget_info *gi; | |
582 | ||
583 | gi = container_of(group, struct gadget_info, functions_group); | |
584 | ||
585 | mutex_lock(&gi->lock); | |
586 | list_del(&fi->cfs_list); | |
587 | mutex_unlock(&gi->lock); | |
588 | config_item_put(item); | |
589 | } | |
590 | ||
591 | static struct configfs_group_operations functions_ops = { | |
592 | .make_group = &function_make, | |
593 | .drop_item = &function_drop, | |
594 | }; | |
595 | ||
596 | static struct config_item_type functions_type = { | |
597 | .ct_group_ops = &functions_ops, | |
598 | .ct_owner = THIS_MODULE, | |
599 | }; | |
600 | ||
88af8bbe SAS |
601 | GS_STRINGS_RW(gadget_config_name, configuration); |
602 | ||
603 | static struct configfs_attribute *gadget_config_name_langid_attrs[] = { | |
45b6a73f | 604 | &gadget_config_name_attr_configuration, |
88af8bbe SAS |
605 | NULL, |
606 | }; | |
607 | ||
608 | static void gadget_config_name_attr_release(struct config_item *item) | |
609 | { | |
610 | struct gadget_config_name *cn = to_gadget_config_name(item); | |
611 | ||
612 | kfree(cn->configuration); | |
613 | ||
614 | list_del(&cn->list); | |
615 | kfree(cn); | |
616 | } | |
617 | ||
618 | USB_CONFIG_STRING_RW_OPS(gadget_config_name); | |
619 | USB_CONFIG_STRINGS_LANG(gadget_config_name, config_usb_cfg); | |
620 | ||
621 | static struct config_group *config_desc_make( | |
622 | struct config_group *group, | |
623 | const char *name) | |
624 | { | |
625 | struct gadget_info *gi; | |
626 | struct config_usb_cfg *cfg; | |
627 | char buf[MAX_NAME_LEN]; | |
628 | char *num_str; | |
629 | u8 num; | |
630 | int ret; | |
631 | ||
632 | gi = container_of(group, struct gadget_info, configs_group); | |
633 | ret = snprintf(buf, MAX_NAME_LEN, "%s", name); | |
634 | if (ret >= MAX_NAME_LEN) | |
635 | return ERR_PTR(-ENAMETOOLONG); | |
636 | ||
637 | num_str = strchr(buf, '.'); | |
638 | if (!num_str) { | |
639 | pr_err("Unable to locate . in name.bConfigurationValue\n"); | |
640 | return ERR_PTR(-EINVAL); | |
641 | } | |
642 | ||
643 | *num_str = '\0'; | |
644 | num_str++; | |
645 | ||
646 | if (!strlen(buf)) | |
647 | return ERR_PTR(-EINVAL); | |
648 | ||
649 | ret = kstrtou8(num_str, 0, &num); | |
650 | if (ret) | |
651 | return ERR_PTR(ret); | |
652 | ||
653 | cfg = kzalloc(sizeof(*cfg), GFP_KERNEL); | |
654 | if (!cfg) | |
655 | return ERR_PTR(-ENOMEM); | |
656 | cfg->c.label = kstrdup(buf, GFP_KERNEL); | |
657 | if (!cfg->c.label) { | |
658 | ret = -ENOMEM; | |
659 | goto err; | |
660 | } | |
661 | cfg->c.bConfigurationValue = num; | |
662 | cfg->c.MaxPower = CONFIG_USB_GADGET_VBUS_DRAW; | |
663 | cfg->c.bmAttributes = USB_CONFIG_ATT_ONE; | |
664 | INIT_LIST_HEAD(&cfg->string_list); | |
665 | INIT_LIST_HEAD(&cfg->func_list); | |
666 | ||
88af8bbe SAS |
667 | config_group_init_type_name(&cfg->group, name, |
668 | &gadget_config_type); | |
1ae1602d | 669 | |
88af8bbe SAS |
670 | config_group_init_type_name(&cfg->strings_group, "strings", |
671 | &gadget_config_name_strings_type); | |
1ae1602d | 672 | configfs_add_default_group(&cfg->strings_group, &cfg->group); |
88af8bbe SAS |
673 | |
674 | ret = usb_add_config_only(&gi->cdev, &cfg->c); | |
675 | if (ret) | |
676 | goto err; | |
677 | ||
678 | return &cfg->group; | |
679 | err: | |
680 | kfree(cfg->c.label); | |
681 | kfree(cfg); | |
682 | return ERR_PTR(ret); | |
683 | } | |
684 | ||
685 | static void config_desc_drop( | |
686 | struct config_group *group, | |
687 | struct config_item *item) | |
688 | { | |
689 | config_item_put(item); | |
690 | } | |
691 | ||
692 | static struct configfs_group_operations config_desc_ops = { | |
693 | .make_group = &config_desc_make, | |
694 | .drop_item = &config_desc_drop, | |
695 | }; | |
696 | ||
697 | static struct config_item_type config_desc_type = { | |
698 | .ct_group_ops = &config_desc_ops, | |
699 | .ct_owner = THIS_MODULE, | |
700 | }; | |
701 | ||
88af8bbe SAS |
702 | GS_STRINGS_RW(gadget_strings, manufacturer); |
703 | GS_STRINGS_RW(gadget_strings, product); | |
704 | GS_STRINGS_RW(gadget_strings, serialnumber); | |
705 | ||
706 | static struct configfs_attribute *gadget_strings_langid_attrs[] = { | |
45b6a73f CH |
707 | &gadget_strings_attr_manufacturer, |
708 | &gadget_strings_attr_product, | |
709 | &gadget_strings_attr_serialnumber, | |
88af8bbe SAS |
710 | NULL, |
711 | }; | |
712 | ||
713 | static void gadget_strings_attr_release(struct config_item *item) | |
714 | { | |
715 | struct gadget_strings *gs = to_gadget_strings(item); | |
716 | ||
717 | kfree(gs->manufacturer); | |
718 | kfree(gs->product); | |
719 | kfree(gs->serialnumber); | |
720 | ||
721 | list_del(&gs->list); | |
722 | kfree(gs); | |
723 | } | |
724 | ||
725 | USB_CONFIG_STRING_RW_OPS(gadget_strings); | |
726 | USB_CONFIG_STRINGS_LANG(gadget_strings, gadget_info); | |
727 | ||
87213d38 AP |
728 | static inline struct os_desc *to_os_desc(struct config_item *item) |
729 | { | |
730 | return container_of(to_config_group(item), struct os_desc, group); | |
731 | } | |
732 | ||
45b6a73f CH |
733 | static inline struct gadget_info *os_desc_item_to_gadget_info( |
734 | struct config_item *item) | |
87213d38 | 735 | { |
45b6a73f CH |
736 | return to_gadget_info(to_os_desc(item)->group.cg_item.ci_parent); |
737 | } | |
87213d38 | 738 | |
45b6a73f CH |
739 | static ssize_t os_desc_use_show(struct config_item *item, char *page) |
740 | { | |
741 | return sprintf(page, "%d", | |
742 | os_desc_item_to_gadget_info(item)->use_os_desc); | |
87213d38 AP |
743 | } |
744 | ||
45b6a73f | 745 | static ssize_t os_desc_use_store(struct config_item *item, const char *page, |
87213d38 AP |
746 | size_t len) |
747 | { | |
45b6a73f | 748 | struct gadget_info *gi = os_desc_item_to_gadget_info(item); |
87213d38 AP |
749 | int ret; |
750 | bool use; | |
751 | ||
87213d38 AP |
752 | mutex_lock(&gi->lock); |
753 | ret = strtobool(page, &use); | |
754 | if (!ret) { | |
755 | gi->use_os_desc = use; | |
756 | ret = len; | |
757 | } | |
758 | mutex_unlock(&gi->lock); | |
759 | ||
760 | return ret; | |
761 | } | |
762 | ||
45b6a73f | 763 | static ssize_t os_desc_b_vendor_code_show(struct config_item *item, char *page) |
87213d38 | 764 | { |
45b6a73f CH |
765 | return sprintf(page, "%d", |
766 | os_desc_item_to_gadget_info(item)->b_vendor_code); | |
87213d38 AP |
767 | } |
768 | ||
45b6a73f | 769 | static ssize_t os_desc_b_vendor_code_store(struct config_item *item, |
87213d38 AP |
770 | const char *page, size_t len) |
771 | { | |
45b6a73f | 772 | struct gadget_info *gi = os_desc_item_to_gadget_info(item); |
87213d38 AP |
773 | int ret; |
774 | u8 b_vendor_code; | |
775 | ||
87213d38 AP |
776 | mutex_lock(&gi->lock); |
777 | ret = kstrtou8(page, 0, &b_vendor_code); | |
778 | if (!ret) { | |
779 | gi->b_vendor_code = b_vendor_code; | |
780 | ret = len; | |
781 | } | |
782 | mutex_unlock(&gi->lock); | |
783 | ||
784 | return ret; | |
785 | } | |
786 | ||
45b6a73f | 787 | static ssize_t os_desc_qw_sign_show(struct config_item *item, char *page) |
87213d38 | 788 | { |
45b6a73f | 789 | struct gadget_info *gi = os_desc_item_to_gadget_info(item); |
87213d38 AP |
790 | |
791 | memcpy(page, gi->qw_sign, OS_STRING_QW_SIGN_LEN); | |
87213d38 AP |
792 | return OS_STRING_QW_SIGN_LEN; |
793 | } | |
794 | ||
45b6a73f | 795 | static ssize_t os_desc_qw_sign_store(struct config_item *item, const char *page, |
87213d38 AP |
796 | size_t len) |
797 | { | |
45b6a73f | 798 | struct gadget_info *gi = os_desc_item_to_gadget_info(item); |
87213d38 AP |
799 | int res, l; |
800 | ||
87213d38 AP |
801 | l = min((int)len, OS_STRING_QW_SIGN_LEN >> 1); |
802 | if (page[l - 1] == '\n') | |
803 | --l; | |
804 | ||
805 | mutex_lock(&gi->lock); | |
806 | res = utf8s_to_utf16s(page, l, | |
807 | UTF16_LITTLE_ENDIAN, (wchar_t *) gi->qw_sign, | |
808 | OS_STRING_QW_SIGN_LEN); | |
809 | if (res > 0) | |
810 | res = len; | |
811 | mutex_unlock(&gi->lock); | |
812 | ||
813 | return res; | |
814 | } | |
815 | ||
45b6a73f CH |
816 | CONFIGFS_ATTR(os_desc_, use); |
817 | CONFIGFS_ATTR(os_desc_, b_vendor_code); | |
818 | CONFIGFS_ATTR(os_desc_, qw_sign); | |
87213d38 AP |
819 | |
820 | static struct configfs_attribute *os_desc_attrs[] = { | |
45b6a73f CH |
821 | &os_desc_attr_use, |
822 | &os_desc_attr_b_vendor_code, | |
823 | &os_desc_attr_qw_sign, | |
87213d38 AP |
824 | NULL, |
825 | }; | |
826 | ||
827 | static void os_desc_attr_release(struct config_item *item) | |
828 | { | |
829 | struct os_desc *os_desc = to_os_desc(item); | |
830 | kfree(os_desc); | |
831 | } | |
832 | ||
da424314 AP |
833 | static int os_desc_link(struct config_item *os_desc_ci, |
834 | struct config_item *usb_cfg_ci) | |
835 | { | |
836 | struct gadget_info *gi = container_of(to_config_group(os_desc_ci), | |
837 | struct gadget_info, os_desc_group); | |
838 | struct usb_composite_dev *cdev = &gi->cdev; | |
839 | struct config_usb_cfg *c_target = | |
840 | container_of(to_config_group(usb_cfg_ci), | |
841 | struct config_usb_cfg, group); | |
842 | struct usb_configuration *c; | |
843 | int ret; | |
844 | ||
845 | mutex_lock(&gi->lock); | |
846 | list_for_each_entry(c, &cdev->configs, list) { | |
847 | if (c == &c_target->c) | |
848 | break; | |
849 | } | |
850 | if (c != &c_target->c) { | |
851 | ret = -EINVAL; | |
852 | goto out; | |
853 | } | |
854 | ||
855 | if (cdev->os_desc_config) { | |
856 | ret = -EBUSY; | |
857 | goto out; | |
858 | } | |
859 | ||
860 | cdev->os_desc_config = &c_target->c; | |
861 | ret = 0; | |
862 | ||
863 | out: | |
864 | mutex_unlock(&gi->lock); | |
865 | return ret; | |
866 | } | |
867 | ||
868 | static int os_desc_unlink(struct config_item *os_desc_ci, | |
869 | struct config_item *usb_cfg_ci) | |
870 | { | |
871 | struct gadget_info *gi = container_of(to_config_group(os_desc_ci), | |
872 | struct gadget_info, os_desc_group); | |
873 | struct usb_composite_dev *cdev = &gi->cdev; | |
874 | ||
875 | mutex_lock(&gi->lock); | |
afdaadc3 | 876 | if (gi->composite.gadget_driver.udc_name) |
da424314 AP |
877 | unregister_gadget(gi); |
878 | cdev->os_desc_config = NULL; | |
afdaadc3 | 879 | WARN_ON(gi->composite.gadget_driver.udc_name); |
da424314 AP |
880 | mutex_unlock(&gi->lock); |
881 | return 0; | |
882 | } | |
883 | ||
87213d38 AP |
884 | static struct configfs_item_operations os_desc_ops = { |
885 | .release = os_desc_attr_release, | |
da424314 AP |
886 | .allow_link = os_desc_link, |
887 | .drop_link = os_desc_unlink, | |
87213d38 AP |
888 | }; |
889 | ||
890 | static struct config_item_type os_desc_type = { | |
891 | .ct_item_ops = &os_desc_ops, | |
892 | .ct_attrs = os_desc_attrs, | |
893 | .ct_owner = THIS_MODULE, | |
894 | }; | |
895 | ||
7419485f AP |
896 | static inline struct usb_os_desc_ext_prop |
897 | *to_usb_os_desc_ext_prop(struct config_item *item) | |
898 | { | |
899 | return container_of(item, struct usb_os_desc_ext_prop, item); | |
900 | } | |
901 | ||
45b6a73f | 902 | static ssize_t ext_prop_type_show(struct config_item *item, char *page) |
7419485f | 903 | { |
45b6a73f | 904 | return sprintf(page, "%d", to_usb_os_desc_ext_prop(item)->type); |
7419485f AP |
905 | } |
906 | ||
45b6a73f | 907 | static ssize_t ext_prop_type_store(struct config_item *item, |
7419485f AP |
908 | const char *page, size_t len) |
909 | { | |
45b6a73f | 910 | struct usb_os_desc_ext_prop *ext_prop = to_usb_os_desc_ext_prop(item); |
7419485f AP |
911 | struct usb_os_desc *desc = to_usb_os_desc(ext_prop->item.ci_parent); |
912 | u8 type; | |
913 | int ret; | |
914 | ||
915 | if (desc->opts_mutex) | |
916 | mutex_lock(desc->opts_mutex); | |
917 | ret = kstrtou8(page, 0, &type); | |
918 | if (ret) | |
919 | goto end; | |
920 | if (type < USB_EXT_PROP_UNICODE || type > USB_EXT_PROP_UNICODE_MULTI) { | |
921 | ret = -EINVAL; | |
922 | goto end; | |
923 | } | |
924 | ||
925 | if ((ext_prop->type == USB_EXT_PROP_BINARY || | |
926 | ext_prop->type == USB_EXT_PROP_LE32 || | |
927 | ext_prop->type == USB_EXT_PROP_BE32) && | |
928 | (type == USB_EXT_PROP_UNICODE || | |
929 | type == USB_EXT_PROP_UNICODE_ENV || | |
930 | type == USB_EXT_PROP_UNICODE_LINK)) | |
931 | ext_prop->data_len <<= 1; | |
932 | else if ((ext_prop->type == USB_EXT_PROP_UNICODE || | |
933 | ext_prop->type == USB_EXT_PROP_UNICODE_ENV || | |
934 | ext_prop->type == USB_EXT_PROP_UNICODE_LINK) && | |
935 | (type == USB_EXT_PROP_BINARY || | |
936 | type == USB_EXT_PROP_LE32 || | |
937 | type == USB_EXT_PROP_BE32)) | |
938 | ext_prop->data_len >>= 1; | |
939 | ext_prop->type = type; | |
940 | ret = len; | |
941 | ||
942 | end: | |
943 | if (desc->opts_mutex) | |
944 | mutex_unlock(desc->opts_mutex); | |
945 | return ret; | |
946 | } | |
947 | ||
45b6a73f | 948 | static ssize_t ext_prop_data_show(struct config_item *item, char *page) |
7419485f | 949 | { |
45b6a73f | 950 | struct usb_os_desc_ext_prop *ext_prop = to_usb_os_desc_ext_prop(item); |
7419485f AP |
951 | int len = ext_prop->data_len; |
952 | ||
953 | if (ext_prop->type == USB_EXT_PROP_UNICODE || | |
954 | ext_prop->type == USB_EXT_PROP_UNICODE_ENV || | |
955 | ext_prop->type == USB_EXT_PROP_UNICODE_LINK) | |
956 | len >>= 1; | |
957 | memcpy(page, ext_prop->data, len); | |
958 | ||
959 | return len; | |
960 | } | |
961 | ||
45b6a73f | 962 | static ssize_t ext_prop_data_store(struct config_item *item, |
7419485f AP |
963 | const char *page, size_t len) |
964 | { | |
45b6a73f | 965 | struct usb_os_desc_ext_prop *ext_prop = to_usb_os_desc_ext_prop(item); |
7419485f AP |
966 | struct usb_os_desc *desc = to_usb_os_desc(ext_prop->item.ci_parent); |
967 | char *new_data; | |
968 | size_t ret_len = len; | |
969 | ||
970 | if (page[len - 1] == '\n' || page[len - 1] == '\0') | |
971 | --len; | |
58b949e0 | 972 | new_data = kmemdup(page, len, GFP_KERNEL); |
7419485f AP |
973 | if (!new_data) |
974 | return -ENOMEM; | |
975 | ||
7419485f AP |
976 | if (desc->opts_mutex) |
977 | mutex_lock(desc->opts_mutex); | |
978 | kfree(ext_prop->data); | |
979 | ext_prop->data = new_data; | |
980 | desc->ext_prop_len -= ext_prop->data_len; | |
981 | ext_prop->data_len = len; | |
982 | desc->ext_prop_len += ext_prop->data_len; | |
983 | if (ext_prop->type == USB_EXT_PROP_UNICODE || | |
984 | ext_prop->type == USB_EXT_PROP_UNICODE_ENV || | |
985 | ext_prop->type == USB_EXT_PROP_UNICODE_LINK) { | |
986 | desc->ext_prop_len -= ext_prop->data_len; | |
987 | ext_prop->data_len <<= 1; | |
988 | ext_prop->data_len += 2; | |
989 | desc->ext_prop_len += ext_prop->data_len; | |
990 | } | |
991 | if (desc->opts_mutex) | |
992 | mutex_unlock(desc->opts_mutex); | |
993 | return ret_len; | |
994 | } | |
995 | ||
45b6a73f CH |
996 | CONFIGFS_ATTR(ext_prop_, type); |
997 | CONFIGFS_ATTR(ext_prop_, data); | |
7419485f AP |
998 | |
999 | static struct configfs_attribute *ext_prop_attrs[] = { | |
45b6a73f CH |
1000 | &ext_prop_attr_type, |
1001 | &ext_prop_attr_data, | |
7419485f AP |
1002 | NULL, |
1003 | }; | |
1004 | ||
1005 | static void usb_os_desc_ext_prop_release(struct config_item *item) | |
1006 | { | |
1007 | struct usb_os_desc_ext_prop *ext_prop = to_usb_os_desc_ext_prop(item); | |
1008 | ||
1009 | kfree(ext_prop); /* frees a whole chunk */ | |
1010 | } | |
1011 | ||
1012 | static struct configfs_item_operations ext_prop_ops = { | |
1013 | .release = usb_os_desc_ext_prop_release, | |
7419485f AP |
1014 | }; |
1015 | ||
1016 | static struct config_item *ext_prop_make( | |
1017 | struct config_group *group, | |
1018 | const char *name) | |
1019 | { | |
1020 | struct usb_os_desc_ext_prop *ext_prop; | |
1021 | struct config_item_type *ext_prop_type; | |
1022 | struct usb_os_desc *desc; | |
1023 | char *vlabuf; | |
1024 | ||
1025 | vla_group(data_chunk); | |
1026 | vla_item(data_chunk, struct usb_os_desc_ext_prop, ext_prop, 1); | |
1027 | vla_item(data_chunk, struct config_item_type, ext_prop_type, 1); | |
1028 | ||
1029 | vlabuf = kzalloc(vla_group_size(data_chunk), GFP_KERNEL); | |
1030 | if (!vlabuf) | |
1031 | return ERR_PTR(-ENOMEM); | |
1032 | ||
1033 | ext_prop = vla_ptr(vlabuf, data_chunk, ext_prop); | |
1034 | ext_prop_type = vla_ptr(vlabuf, data_chunk, ext_prop_type); | |
1035 | ||
1036 | desc = container_of(group, struct usb_os_desc, group); | |
1037 | ext_prop_type->ct_item_ops = &ext_prop_ops; | |
1038 | ext_prop_type->ct_attrs = ext_prop_attrs; | |
1039 | ext_prop_type->ct_owner = desc->owner; | |
1040 | ||
1041 | config_item_init_type_name(&ext_prop->item, name, ext_prop_type); | |
1042 | ||
1043 | ext_prop->name = kstrdup(name, GFP_KERNEL); | |
1044 | if (!ext_prop->name) { | |
1045 | kfree(vlabuf); | |
1046 | return ERR_PTR(-ENOMEM); | |
1047 | } | |
1048 | desc->ext_prop_len += 14; | |
1049 | ext_prop->name_len = 2 * strlen(ext_prop->name) + 2; | |
1050 | if (desc->opts_mutex) | |
1051 | mutex_lock(desc->opts_mutex); | |
1052 | desc->ext_prop_len += ext_prop->name_len; | |
1053 | list_add_tail(&ext_prop->entry, &desc->ext_prop); | |
1054 | ++desc->ext_prop_count; | |
1055 | if (desc->opts_mutex) | |
1056 | mutex_unlock(desc->opts_mutex); | |
1057 | ||
1058 | return &ext_prop->item; | |
1059 | } | |
1060 | ||
1061 | static void ext_prop_drop(struct config_group *group, struct config_item *item) | |
1062 | { | |
1063 | struct usb_os_desc_ext_prop *ext_prop = to_usb_os_desc_ext_prop(item); | |
1064 | struct usb_os_desc *desc = to_usb_os_desc(&group->cg_item); | |
1065 | ||
1066 | if (desc->opts_mutex) | |
1067 | mutex_lock(desc->opts_mutex); | |
1068 | list_del(&ext_prop->entry); | |
1069 | --desc->ext_prop_count; | |
1070 | kfree(ext_prop->name); | |
1071 | desc->ext_prop_len -= (ext_prop->name_len + ext_prop->data_len + 14); | |
1072 | if (desc->opts_mutex) | |
1073 | mutex_unlock(desc->opts_mutex); | |
1074 | config_item_put(item); | |
1075 | } | |
1076 | ||
1077 | static struct configfs_group_operations interf_grp_ops = { | |
1078 | .make_item = &ext_prop_make, | |
1079 | .drop_item = &ext_prop_drop, | |
1080 | }; | |
1081 | ||
45b6a73f | 1082 | static ssize_t interf_grp_compatible_id_show(struct config_item *item, |
fe00b138 | 1083 | char *page) |
da424314 | 1084 | { |
45b6a73f | 1085 | memcpy(page, to_usb_os_desc(item)->ext_compat_id, 8); |
da424314 AP |
1086 | return 8; |
1087 | } | |
1088 | ||
45b6a73f | 1089 | static ssize_t interf_grp_compatible_id_store(struct config_item *item, |
fe00b138 | 1090 | const char *page, size_t len) |
da424314 | 1091 | { |
45b6a73f | 1092 | struct usb_os_desc *desc = to_usb_os_desc(item); |
da424314 AP |
1093 | int l; |
1094 | ||
1095 | l = min_t(int, 8, len); | |
1096 | if (page[l - 1] == '\n') | |
1097 | --l; | |
1098 | if (desc->opts_mutex) | |
1099 | mutex_lock(desc->opts_mutex); | |
1100 | memcpy(desc->ext_compat_id, page, l); | |
da424314 AP |
1101 | |
1102 | if (desc->opts_mutex) | |
1103 | mutex_unlock(desc->opts_mutex); | |
1104 | ||
1105 | return len; | |
1106 | } | |
1107 | ||
45b6a73f | 1108 | static ssize_t interf_grp_sub_compatible_id_show(struct config_item *item, |
fe00b138 | 1109 | char *page) |
da424314 | 1110 | { |
45b6a73f | 1111 | memcpy(page, to_usb_os_desc(item)->ext_compat_id + 8, 8); |
da424314 AP |
1112 | return 8; |
1113 | } | |
1114 | ||
45b6a73f | 1115 | static ssize_t interf_grp_sub_compatible_id_store(struct config_item *item, |
fe00b138 | 1116 | const char *page, size_t len) |
da424314 | 1117 | { |
45b6a73f | 1118 | struct usb_os_desc *desc = to_usb_os_desc(item); |
da424314 AP |
1119 | int l; |
1120 | ||
1121 | l = min_t(int, 8, len); | |
1122 | if (page[l - 1] == '\n') | |
1123 | --l; | |
1124 | if (desc->opts_mutex) | |
1125 | mutex_lock(desc->opts_mutex); | |
1126 | memcpy(desc->ext_compat_id + 8, page, l); | |
da424314 AP |
1127 | |
1128 | if (desc->opts_mutex) | |
1129 | mutex_unlock(desc->opts_mutex); | |
1130 | ||
1131 | return len; | |
1132 | } | |
1133 | ||
45b6a73f CH |
1134 | CONFIGFS_ATTR(interf_grp_, compatible_id); |
1135 | CONFIGFS_ATTR(interf_grp_, sub_compatible_id); | |
da424314 AP |
1136 | |
1137 | static struct configfs_attribute *interf_grp_attrs[] = { | |
45b6a73f CH |
1138 | &interf_grp_attr_compatible_id, |
1139 | &interf_grp_attr_sub_compatible_id, | |
da424314 AP |
1140 | NULL |
1141 | }; | |
1142 | ||
1143 | int usb_os_desc_prepare_interf_dir(struct config_group *parent, | |
1144 | int n_interf, | |
1145 | struct usb_os_desc **desc, | |
14574b54 | 1146 | char **names, |
da424314 AP |
1147 | struct module *owner) |
1148 | { | |
1ae1602d | 1149 | struct config_group *os_desc_group; |
da424314 AP |
1150 | struct config_item_type *os_desc_type, *interface_type; |
1151 | ||
1152 | vla_group(data_chunk); | |
da424314 | 1153 | vla_item(data_chunk, struct config_group, os_desc_group, 1); |
da424314 AP |
1154 | vla_item(data_chunk, struct config_item_type, os_desc_type, 1); |
1155 | vla_item(data_chunk, struct config_item_type, interface_type, 1); | |
1156 | ||
1157 | char *vlabuf = kzalloc(vla_group_size(data_chunk), GFP_KERNEL); | |
1158 | if (!vlabuf) | |
1159 | return -ENOMEM; | |
1160 | ||
da424314 AP |
1161 | os_desc_group = vla_ptr(vlabuf, data_chunk, os_desc_group); |
1162 | os_desc_type = vla_ptr(vlabuf, data_chunk, os_desc_type); | |
da424314 AP |
1163 | interface_type = vla_ptr(vlabuf, data_chunk, interface_type); |
1164 | ||
da424314 AP |
1165 | os_desc_type->ct_owner = owner; |
1166 | config_group_init_type_name(os_desc_group, "os_desc", os_desc_type); | |
1ae1602d | 1167 | configfs_add_default_group(os_desc_group, parent); |
da424314 | 1168 | |
7419485f | 1169 | interface_type->ct_group_ops = &interf_grp_ops; |
da424314 AP |
1170 | interface_type->ct_attrs = interf_grp_attrs; |
1171 | interface_type->ct_owner = owner; | |
1172 | ||
1173 | while (n_interf--) { | |
1174 | struct usb_os_desc *d; | |
1175 | ||
1176 | d = desc[n_interf]; | |
7419485f | 1177 | d->owner = owner; |
da424314 | 1178 | config_group_init_type_name(&d->group, "", interface_type); |
14574b54 AP |
1179 | config_item_set_name(&d->group.cg_item, "interface.%s", |
1180 | names[n_interf]); | |
1ae1602d | 1181 | configfs_add_default_group(&d->group, os_desc_group); |
da424314 AP |
1182 | } |
1183 | ||
1184 | return 0; | |
1185 | } | |
1186 | EXPORT_SYMBOL(usb_os_desc_prepare_interf_dir); | |
1187 | ||
88af8bbe SAS |
1188 | static int configfs_do_nothing(struct usb_composite_dev *cdev) |
1189 | { | |
75bfe23a | 1190 | WARN_ON(1); |
88af8bbe SAS |
1191 | return -EINVAL; |
1192 | } | |
1193 | ||
1194 | int composite_dev_prepare(struct usb_composite_driver *composite, | |
1195 | struct usb_composite_dev *dev); | |
1196 | ||
da424314 AP |
1197 | int composite_os_desc_req_prepare(struct usb_composite_dev *cdev, |
1198 | struct usb_ep *ep0); | |
1199 | ||
88af8bbe SAS |
1200 | static void purge_configs_funcs(struct gadget_info *gi) |
1201 | { | |
1202 | struct usb_configuration *c; | |
1203 | ||
1204 | list_for_each_entry(c, &gi->cdev.configs, list) { | |
1205 | struct usb_function *f, *tmp; | |
1206 | struct config_usb_cfg *cfg; | |
1207 | ||
1208 | cfg = container_of(c, struct config_usb_cfg, c); | |
1209 | ||
1210 | list_for_each_entry_safe(f, tmp, &c->functions, list) { | |
1211 | ||
1212 | list_move_tail(&f->list, &cfg->func_list); | |
1213 | if (f->unbind) { | |
1214 | dev_err(&gi->cdev.gadget->dev, "unbind function" | |
1215 | " '%s'/%p\n", f->name, f); | |
1216 | f->unbind(c, f); | |
1217 | } | |
1218 | } | |
1219 | c->next_interface_id = 0; | |
903124fe | 1220 | memset(c->interface, 0, sizeof(c->interface)); |
554eead5 | 1221 | c->superspeed_plus = 0; |
88af8bbe SAS |
1222 | c->superspeed = 0; |
1223 | c->highspeed = 0; | |
1224 | c->fullspeed = 0; | |
1225 | } | |
1226 | } | |
1227 | ||
1228 | static int configfs_composite_bind(struct usb_gadget *gadget, | |
1229 | struct usb_gadget_driver *gdriver) | |
1230 | { | |
1231 | struct usb_composite_driver *composite = to_cdriver(gdriver); | |
1232 | struct gadget_info *gi = container_of(composite, | |
1233 | struct gadget_info, composite); | |
1234 | struct usb_composite_dev *cdev = &gi->cdev; | |
1235 | struct usb_configuration *c; | |
1236 | struct usb_string *s; | |
1237 | unsigned i; | |
1238 | int ret; | |
1239 | ||
1240 | /* the gi->lock is hold by the caller */ | |
1241 | cdev->gadget = gadget; | |
1242 | set_gadget_data(gadget, cdev); | |
1243 | ret = composite_dev_prepare(composite, cdev); | |
1244 | if (ret) | |
1245 | return ret; | |
1246 | /* and now the gadget bind */ | |
1247 | ret = -EINVAL; | |
1248 | ||
1249 | if (list_empty(&gi->cdev.configs)) { | |
4d9f872c | 1250 | pr_err("Need at least one configuration in %s.\n", |
88af8bbe SAS |
1251 | gi->composite.name); |
1252 | goto err_comp_cleanup; | |
1253 | } | |
1254 | ||
1255 | ||
1256 | list_for_each_entry(c, &gi->cdev.configs, list) { | |
1257 | struct config_usb_cfg *cfg; | |
1258 | ||
1259 | cfg = container_of(c, struct config_usb_cfg, c); | |
1260 | if (list_empty(&cfg->func_list)) { | |
4d9f872c | 1261 | pr_err("Config %s/%d of %s needs at least one function.\n", |
88af8bbe SAS |
1262 | c->label, c->bConfigurationValue, |
1263 | gi->composite.name); | |
1264 | goto err_comp_cleanup; | |
1265 | } | |
1266 | } | |
1267 | ||
1268 | /* init all strings */ | |
1269 | if (!list_empty(&gi->string_list)) { | |
1270 | struct gadget_strings *gs; | |
1271 | ||
1272 | i = 0; | |
1273 | list_for_each_entry(gs, &gi->string_list, list) { | |
1274 | ||
1275 | gi->gstrings[i] = &gs->stringtab_dev; | |
1276 | gs->stringtab_dev.strings = gs->strings; | |
1277 | gs->strings[USB_GADGET_MANUFACTURER_IDX].s = | |
1278 | gs->manufacturer; | |
1279 | gs->strings[USB_GADGET_PRODUCT_IDX].s = gs->product; | |
1280 | gs->strings[USB_GADGET_SERIAL_IDX].s = gs->serialnumber; | |
1281 | i++; | |
1282 | } | |
1283 | gi->gstrings[i] = NULL; | |
1284 | s = usb_gstrings_attach(&gi->cdev, gi->gstrings, | |
1285 | USB_GADGET_FIRST_AVAIL_IDX); | |
fea77077 WY |
1286 | if (IS_ERR(s)) { |
1287 | ret = PTR_ERR(s); | |
88af8bbe | 1288 | goto err_comp_cleanup; |
fea77077 | 1289 | } |
88af8bbe SAS |
1290 | |
1291 | gi->cdev.desc.iManufacturer = s[USB_GADGET_MANUFACTURER_IDX].id; | |
1292 | gi->cdev.desc.iProduct = s[USB_GADGET_PRODUCT_IDX].id; | |
1293 | gi->cdev.desc.iSerialNumber = s[USB_GADGET_SERIAL_IDX].id; | |
1294 | } | |
1295 | ||
87213d38 AP |
1296 | if (gi->use_os_desc) { |
1297 | cdev->use_os_string = true; | |
1298 | cdev->b_vendor_code = gi->b_vendor_code; | |
1299 | memcpy(cdev->qw_sign, gi->qw_sign, OS_STRING_QW_SIGN_LEN); | |
1300 | } | |
1301 | ||
41ce84c8 LJ |
1302 | if (gadget_is_otg(gadget) && !otg_desc[0]) { |
1303 | struct usb_descriptor_header *usb_desc; | |
1304 | ||
1305 | usb_desc = usb_otg_descriptor_alloc(gadget); | |
1306 | if (!usb_desc) { | |
1307 | ret = -ENOMEM; | |
1308 | goto err_comp_cleanup; | |
1309 | } | |
1310 | usb_otg_descriptor_init(gadget, usb_desc); | |
1311 | otg_desc[0] = usb_desc; | |
1312 | otg_desc[1] = NULL; | |
1313 | } | |
1314 | ||
88af8bbe SAS |
1315 | /* Go through all configs, attach all functions */ |
1316 | list_for_each_entry(c, &gi->cdev.configs, list) { | |
1317 | struct config_usb_cfg *cfg; | |
1318 | struct usb_function *f; | |
1319 | struct usb_function *tmp; | |
1320 | struct gadget_config_name *cn; | |
1321 | ||
41ce84c8 LJ |
1322 | if (gadget_is_otg(gadget)) |
1323 | c->descriptors = otg_desc; | |
1324 | ||
88af8bbe SAS |
1325 | cfg = container_of(c, struct config_usb_cfg, c); |
1326 | if (!list_empty(&cfg->string_list)) { | |
1327 | i = 0; | |
1328 | list_for_each_entry(cn, &cfg->string_list, list) { | |
1329 | cfg->gstrings[i] = &cn->stringtab_dev; | |
1330 | cn->stringtab_dev.strings = &cn->strings; | |
1331 | cn->strings.s = cn->configuration; | |
1332 | i++; | |
1333 | } | |
1334 | cfg->gstrings[i] = NULL; | |
1335 | s = usb_gstrings_attach(&gi->cdev, cfg->gstrings, 1); | |
fea77077 WY |
1336 | if (IS_ERR(s)) { |
1337 | ret = PTR_ERR(s); | |
88af8bbe | 1338 | goto err_comp_cleanup; |
fea77077 | 1339 | } |
88af8bbe SAS |
1340 | c->iConfiguration = s[0].id; |
1341 | } | |
1342 | ||
1343 | list_for_each_entry_safe(f, tmp, &cfg->func_list, list) { | |
1344 | list_del(&f->list); | |
1345 | ret = usb_add_function(c, f); | |
5a68e9b5 AP |
1346 | if (ret) { |
1347 | list_add(&f->list, &cfg->func_list); | |
88af8bbe | 1348 | goto err_purge_funcs; |
5a68e9b5 | 1349 | } |
88af8bbe SAS |
1350 | } |
1351 | usb_ep_autoconfig_reset(cdev->gadget); | |
1352 | } | |
da424314 AP |
1353 | if (cdev->use_os_string) { |
1354 | ret = composite_os_desc_req_prepare(cdev, gadget->ep0); | |
1355 | if (ret) | |
1356 | goto err_purge_funcs; | |
1357 | } | |
1358 | ||
88af8bbe SAS |
1359 | usb_ep_autoconfig_reset(cdev->gadget); |
1360 | return 0; | |
1361 | ||
1362 | err_purge_funcs: | |
1363 | purge_configs_funcs(gi); | |
1364 | err_comp_cleanup: | |
1365 | composite_dev_cleanup(cdev); | |
1366 | return ret; | |
1367 | } | |
1368 | ||
1369 | static void configfs_composite_unbind(struct usb_gadget *gadget) | |
1370 | { | |
1371 | struct usb_composite_dev *cdev; | |
1372 | struct gadget_info *gi; | |
1373 | ||
1374 | /* the gi->lock is hold by the caller */ | |
1375 | ||
1376 | cdev = get_gadget_data(gadget); | |
1377 | gi = container_of(cdev, struct gadget_info, cdev); | |
1378 | ||
41ce84c8 LJ |
1379 | kfree(otg_desc[0]); |
1380 | otg_desc[0] = NULL; | |
88af8bbe SAS |
1381 | purge_configs_funcs(gi); |
1382 | composite_dev_cleanup(cdev); | |
1383 | usb_ep_autoconfig_reset(cdev->gadget); | |
1384 | cdev->gadget = NULL; | |
1385 | set_gadget_data(gadget, NULL); | |
1386 | } | |
1387 | ||
1388 | static const struct usb_gadget_driver configfs_driver_template = { | |
1389 | .bind = configfs_composite_bind, | |
1390 | .unbind = configfs_composite_unbind, | |
1391 | ||
1392 | .setup = composite_setup, | |
02f751b4 | 1393 | .reset = composite_disconnect, |
88af8bbe SAS |
1394 | .disconnect = composite_disconnect, |
1395 | ||
3a571870 AP |
1396 | .suspend = composite_suspend, |
1397 | .resume = composite_resume, | |
1398 | ||
88af8bbe SAS |
1399 | .max_speed = USB_SPEED_SUPER, |
1400 | .driver = { | |
1401 | .owner = THIS_MODULE, | |
1402 | .name = "configfs-gadget", | |
1403 | }, | |
f1bddbb3 | 1404 | .match_existing_only = 1, |
88af8bbe SAS |
1405 | }; |
1406 | ||
1407 | static struct config_group *gadgets_make( | |
1408 | struct config_group *group, | |
1409 | const char *name) | |
1410 | { | |
1411 | struct gadget_info *gi; | |
1412 | ||
1413 | gi = kzalloc(sizeof(*gi), GFP_KERNEL); | |
1414 | if (!gi) | |
1415 | return ERR_PTR(-ENOMEM); | |
1416 | ||
1ae1602d | 1417 | config_group_init_type_name(&gi->group, name, &gadget_root_type); |
88af8bbe SAS |
1418 | |
1419 | config_group_init_type_name(&gi->functions_group, "functions", | |
1420 | &functions_type); | |
1ae1602d CH |
1421 | configfs_add_default_group(&gi->functions_group, &gi->group); |
1422 | ||
88af8bbe SAS |
1423 | config_group_init_type_name(&gi->configs_group, "configs", |
1424 | &config_desc_type); | |
1ae1602d CH |
1425 | configfs_add_default_group(&gi->configs_group, &gi->group); |
1426 | ||
88af8bbe SAS |
1427 | config_group_init_type_name(&gi->strings_group, "strings", |
1428 | &gadget_strings_strings_type); | |
1ae1602d CH |
1429 | configfs_add_default_group(&gi->strings_group, &gi->group); |
1430 | ||
87213d38 AP |
1431 | config_group_init_type_name(&gi->os_desc_group, "os_desc", |
1432 | &os_desc_type); | |
1ae1602d | 1433 | configfs_add_default_group(&gi->os_desc_group, &gi->group); |
88af8bbe SAS |
1434 | |
1435 | gi->composite.bind = configfs_do_nothing; | |
1436 | gi->composite.unbind = configfs_do_nothing; | |
1437 | gi->composite.suspend = NULL; | |
1438 | gi->composite.resume = NULL; | |
1439 | gi->composite.max_speed = USB_SPEED_SUPER; | |
1440 | ||
1441 | mutex_init(&gi->lock); | |
1442 | INIT_LIST_HEAD(&gi->string_list); | |
1443 | INIT_LIST_HEAD(&gi->available_func); | |
1444 | ||
1445 | composite_init_dev(&gi->cdev); | |
1446 | gi->cdev.desc.bLength = USB_DT_DEVICE_SIZE; | |
1447 | gi->cdev.desc.bDescriptorType = USB_DT_DEVICE; | |
1448 | gi->cdev.desc.bcdDevice = cpu_to_le16(get_default_bcdDevice()); | |
1449 | ||
1450 | gi->composite.gadget_driver = configfs_driver_template; | |
1451 | ||
1452 | gi->composite.gadget_driver.function = kstrdup(name, GFP_KERNEL); | |
1453 | gi->composite.name = gi->composite.gadget_driver.function; | |
1454 | ||
1455 | if (!gi->composite.gadget_driver.function) | |
1456 | goto err; | |
1457 | ||
88af8bbe SAS |
1458 | return &gi->group; |
1459 | err: | |
1460 | kfree(gi); | |
1461 | return ERR_PTR(-ENOMEM); | |
1462 | } | |
1463 | ||
1464 | static void gadgets_drop(struct config_group *group, struct config_item *item) | |
1465 | { | |
1466 | config_item_put(item); | |
1467 | } | |
1468 | ||
1469 | static struct configfs_group_operations gadgets_ops = { | |
1470 | .make_group = &gadgets_make, | |
1471 | .drop_item = &gadgets_drop, | |
1472 | }; | |
1473 | ||
1474 | static struct config_item_type gadgets_type = { | |
1475 | .ct_group_ops = &gadgets_ops, | |
1476 | .ct_owner = THIS_MODULE, | |
1477 | }; | |
1478 | ||
1479 | static struct configfs_subsystem gadget_subsys = { | |
1480 | .su_group = { | |
1481 | .cg_item = { | |
1482 | .ci_namebuf = "usb_gadget", | |
1483 | .ci_type = &gadgets_type, | |
1484 | }, | |
1485 | }, | |
1486 | .su_mutex = __MUTEX_INITIALIZER(gadget_subsys.su_mutex), | |
1487 | }; | |
1488 | ||
092a4bd0 AP |
1489 | void unregister_gadget_item(struct config_item *item) |
1490 | { | |
1491 | struct gadget_info *gi = to_gadget_info(item); | |
1492 | ||
cee51c33 | 1493 | mutex_lock(&gi->lock); |
092a4bd0 | 1494 | unregister_gadget(gi); |
cee51c33 | 1495 | mutex_unlock(&gi->lock); |
092a4bd0 | 1496 | } |
0700faaf | 1497 | EXPORT_SYMBOL_GPL(unregister_gadget_item); |
092a4bd0 | 1498 | |
88af8bbe SAS |
1499 | static int __init gadget_cfs_init(void) |
1500 | { | |
1501 | int ret; | |
1502 | ||
1503 | config_group_init(&gadget_subsys.su_group); | |
1504 | ||
1505 | ret = configfs_register_subsystem(&gadget_subsys); | |
1506 | return ret; | |
1507 | } | |
1508 | module_init(gadget_cfs_init); | |
1509 | ||
1510 | static void __exit gadget_cfs_exit(void) | |
1511 | { | |
1512 | configfs_unregister_subsystem(&gadget_subsys); | |
1513 | } | |
1514 | module_exit(gadget_cfs_exit); |