Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1 | #include <linux/configfs.h> |
| 2 | #include <linux/module.h> |
| 3 | #include <linux/slab.h> |
| 4 | #include <linux/device.h> |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 5 | #include <linux/nls.h> |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 6 | #include <linux/usb/composite.h> |
| 7 | #include <linux/usb/gadget_configfs.h> |
Rashika Kheria | 0009e99 | 2013-12-19 15:37:37 +0530 | [diff] [blame] | 8 | #include "configfs.h" |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 9 | #include "u_f.h" |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 10 | #include "u_os_desc.h" |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 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 | |
Li Jun | 41ce84c | 2015-07-09 15:18:48 +0800 | [diff] [blame] | 44 | static const struct usb_descriptor_header *otg_desc[2]; |
| 45 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 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; |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 51 | struct config_group os_desc_group; |
| 52 | struct config_group *default_groups[5]; |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 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 | |
| 59 | const char *udc_name; |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 60 | struct usb_composite_driver composite; |
| 61 | struct usb_composite_dev cdev; |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 62 | bool use_os_desc; |
| 63 | char b_vendor_code; |
| 64 | char qw_sign[OS_STRING_QW_SIGN_LEN]; |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 65 | }; |
| 66 | |
| 67 | struct config_usb_cfg { |
| 68 | struct config_group group; |
| 69 | struct config_group strings_group; |
| 70 | struct config_group *default_groups[2]; |
| 71 | struct list_head string_list; |
| 72 | struct usb_configuration c; |
| 73 | struct list_head func_list; |
| 74 | struct usb_gadget_strings *gstrings[MAX_USB_STRING_LANGS + 1]; |
| 75 | }; |
| 76 | |
| 77 | struct gadget_strings { |
| 78 | struct usb_gadget_strings stringtab_dev; |
| 79 | struct usb_string strings[USB_GADGET_FIRST_AVAIL_IDX]; |
| 80 | char *manufacturer; |
| 81 | char *product; |
| 82 | char *serialnumber; |
| 83 | |
| 84 | struct config_group group; |
| 85 | struct list_head list; |
| 86 | }; |
| 87 | |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 88 | struct os_desc { |
| 89 | struct config_group group; |
| 90 | }; |
| 91 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 92 | struct gadget_config_name { |
| 93 | struct usb_gadget_strings stringtab_dev; |
| 94 | struct usb_string strings; |
| 95 | char *configuration; |
| 96 | |
| 97 | struct config_group group; |
| 98 | struct list_head list; |
| 99 | }; |
| 100 | |
| 101 | static int usb_string_copy(const char *s, char **s_copy) |
| 102 | { |
| 103 | int ret; |
| 104 | char *str; |
| 105 | char *copy = *s_copy; |
| 106 | ret = strlen(s); |
| 107 | if (ret > 126) |
| 108 | return -EOVERFLOW; |
| 109 | |
| 110 | str = kstrdup(s, GFP_KERNEL); |
| 111 | if (!str) |
| 112 | return -ENOMEM; |
| 113 | if (str[ret - 1] == '\n') |
| 114 | str[ret - 1] = '\0'; |
| 115 | kfree(copy); |
| 116 | *s_copy = str; |
| 117 | return 0; |
| 118 | } |
| 119 | |
| 120 | CONFIGFS_ATTR_STRUCT(gadget_info); |
| 121 | CONFIGFS_ATTR_STRUCT(config_usb_cfg); |
| 122 | |
| 123 | #define GI_DEVICE_DESC_ITEM_ATTR(name) \ |
| 124 | static struct gadget_info_attribute gadget_cdev_desc_##name = \ |
| 125 | __CONFIGFS_ATTR(name, S_IRUGO | S_IWUSR, \ |
| 126 | gadget_dev_desc_##name##_show, \ |
| 127 | gadget_dev_desc_##name##_store) |
| 128 | |
| 129 | #define GI_DEVICE_DESC_SIMPLE_R_u8(__name) \ |
| 130 | static ssize_t gadget_dev_desc_##__name##_show(struct gadget_info *gi, \ |
| 131 | char *page) \ |
| 132 | { \ |
| 133 | return sprintf(page, "0x%02x\n", gi->cdev.desc.__name); \ |
| 134 | } |
| 135 | |
| 136 | #define GI_DEVICE_DESC_SIMPLE_R_u16(__name) \ |
| 137 | static ssize_t gadget_dev_desc_##__name##_show(struct gadget_info *gi, \ |
| 138 | char *page) \ |
| 139 | { \ |
| 140 | return sprintf(page, "0x%04x\n", le16_to_cpup(&gi->cdev.desc.__name)); \ |
| 141 | } |
| 142 | |
| 143 | |
| 144 | #define GI_DEVICE_DESC_SIMPLE_W_u8(_name) \ |
| 145 | static ssize_t gadget_dev_desc_##_name##_store(struct gadget_info *gi, \ |
| 146 | const char *page, size_t len) \ |
| 147 | { \ |
| 148 | u8 val; \ |
| 149 | int ret; \ |
| 150 | ret = kstrtou8(page, 0, &val); \ |
| 151 | if (ret) \ |
| 152 | return ret; \ |
| 153 | gi->cdev.desc._name = val; \ |
| 154 | return len; \ |
| 155 | } |
| 156 | |
| 157 | #define GI_DEVICE_DESC_SIMPLE_W_u16(_name) \ |
| 158 | static ssize_t gadget_dev_desc_##_name##_store(struct gadget_info *gi, \ |
| 159 | const char *page, size_t len) \ |
| 160 | { \ |
| 161 | u16 val; \ |
| 162 | int ret; \ |
| 163 | ret = kstrtou16(page, 0, &val); \ |
| 164 | if (ret) \ |
| 165 | return ret; \ |
| 166 | gi->cdev.desc._name = cpu_to_le16p(&val); \ |
| 167 | return len; \ |
| 168 | } |
| 169 | |
| 170 | #define GI_DEVICE_DESC_SIMPLE_RW(_name, _type) \ |
| 171 | GI_DEVICE_DESC_SIMPLE_R_##_type(_name) \ |
| 172 | GI_DEVICE_DESC_SIMPLE_W_##_type(_name) |
| 173 | |
| 174 | GI_DEVICE_DESC_SIMPLE_R_u16(bcdUSB); |
| 175 | GI_DEVICE_DESC_SIMPLE_RW(bDeviceClass, u8); |
| 176 | GI_DEVICE_DESC_SIMPLE_RW(bDeviceSubClass, u8); |
| 177 | GI_DEVICE_DESC_SIMPLE_RW(bDeviceProtocol, u8); |
| 178 | GI_DEVICE_DESC_SIMPLE_RW(bMaxPacketSize0, u8); |
| 179 | GI_DEVICE_DESC_SIMPLE_RW(idVendor, u16); |
| 180 | GI_DEVICE_DESC_SIMPLE_RW(idProduct, u16); |
| 181 | GI_DEVICE_DESC_SIMPLE_R_u16(bcdDevice); |
| 182 | |
| 183 | static ssize_t is_valid_bcd(u16 bcd_val) |
| 184 | { |
| 185 | if ((bcd_val & 0xf) > 9) |
| 186 | return -EINVAL; |
| 187 | if (((bcd_val >> 4) & 0xf) > 9) |
| 188 | return -EINVAL; |
| 189 | if (((bcd_val >> 8) & 0xf) > 9) |
| 190 | return -EINVAL; |
| 191 | if (((bcd_val >> 12) & 0xf) > 9) |
| 192 | return -EINVAL; |
| 193 | return 0; |
| 194 | } |
| 195 | |
| 196 | static ssize_t gadget_dev_desc_bcdDevice_store(struct gadget_info *gi, |
| 197 | const char *page, size_t len) |
| 198 | { |
| 199 | u16 bcdDevice; |
| 200 | int ret; |
| 201 | |
| 202 | ret = kstrtou16(page, 0, &bcdDevice); |
| 203 | if (ret) |
| 204 | return ret; |
| 205 | ret = is_valid_bcd(bcdDevice); |
| 206 | if (ret) |
| 207 | return ret; |
| 208 | |
| 209 | gi->cdev.desc.bcdDevice = cpu_to_le16(bcdDevice); |
| 210 | return len; |
| 211 | } |
| 212 | |
| 213 | static ssize_t gadget_dev_desc_bcdUSB_store(struct gadget_info *gi, |
| 214 | const char *page, size_t len) |
| 215 | { |
| 216 | u16 bcdUSB; |
| 217 | int ret; |
| 218 | |
| 219 | ret = kstrtou16(page, 0, &bcdUSB); |
| 220 | if (ret) |
| 221 | return ret; |
| 222 | ret = is_valid_bcd(bcdUSB); |
| 223 | if (ret) |
| 224 | return ret; |
| 225 | |
| 226 | gi->cdev.desc.bcdUSB = cpu_to_le16(bcdUSB); |
| 227 | return len; |
| 228 | } |
| 229 | |
| 230 | static ssize_t gadget_dev_desc_UDC_show(struct gadget_info *gi, char *page) |
| 231 | { |
| 232 | return sprintf(page, "%s\n", gi->udc_name ?: ""); |
| 233 | } |
| 234 | |
| 235 | static int unregister_gadget(struct gadget_info *gi) |
| 236 | { |
| 237 | int ret; |
| 238 | |
| 239 | if (!gi->udc_name) |
| 240 | return -ENODEV; |
| 241 | |
| 242 | ret = usb_gadget_unregister_driver(&gi->composite.gadget_driver); |
| 243 | if (ret) |
| 244 | return ret; |
| 245 | kfree(gi->udc_name); |
| 246 | gi->udc_name = NULL; |
| 247 | return 0; |
| 248 | } |
| 249 | |
| 250 | static ssize_t gadget_dev_desc_UDC_store(struct gadget_info *gi, |
| 251 | const char *page, size_t len) |
| 252 | { |
| 253 | char *name; |
| 254 | int ret; |
| 255 | |
| 256 | name = kstrdup(page, GFP_KERNEL); |
| 257 | if (!name) |
| 258 | return -ENOMEM; |
| 259 | if (name[len - 1] == '\n') |
| 260 | name[len - 1] = '\0'; |
| 261 | |
| 262 | mutex_lock(&gi->lock); |
| 263 | |
| 264 | if (!strlen(name)) { |
| 265 | ret = unregister_gadget(gi); |
| 266 | if (ret) |
| 267 | goto err; |
| 268 | } else { |
| 269 | if (gi->udc_name) { |
| 270 | ret = -EBUSY; |
| 271 | goto err; |
| 272 | } |
Felipe Balbi | 02e8c96 | 2014-10-17 18:57:06 -0500 | [diff] [blame] | 273 | ret = usb_udc_attach_driver(name, &gi->composite.gadget_driver); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 274 | if (ret) |
| 275 | goto err; |
| 276 | gi->udc_name = name; |
| 277 | } |
| 278 | mutex_unlock(&gi->lock); |
| 279 | return len; |
| 280 | err: |
| 281 | kfree(name); |
| 282 | mutex_unlock(&gi->lock); |
| 283 | return ret; |
| 284 | } |
| 285 | |
| 286 | GI_DEVICE_DESC_ITEM_ATTR(bDeviceClass); |
| 287 | GI_DEVICE_DESC_ITEM_ATTR(bDeviceSubClass); |
| 288 | GI_DEVICE_DESC_ITEM_ATTR(bDeviceProtocol); |
| 289 | GI_DEVICE_DESC_ITEM_ATTR(bMaxPacketSize0); |
| 290 | GI_DEVICE_DESC_ITEM_ATTR(idVendor); |
| 291 | GI_DEVICE_DESC_ITEM_ATTR(idProduct); |
| 292 | GI_DEVICE_DESC_ITEM_ATTR(bcdDevice); |
| 293 | GI_DEVICE_DESC_ITEM_ATTR(bcdUSB); |
| 294 | GI_DEVICE_DESC_ITEM_ATTR(UDC); |
| 295 | |
| 296 | static struct configfs_attribute *gadget_root_attrs[] = { |
| 297 | &gadget_cdev_desc_bDeviceClass.attr, |
| 298 | &gadget_cdev_desc_bDeviceSubClass.attr, |
| 299 | &gadget_cdev_desc_bDeviceProtocol.attr, |
| 300 | &gadget_cdev_desc_bMaxPacketSize0.attr, |
| 301 | &gadget_cdev_desc_idVendor.attr, |
| 302 | &gadget_cdev_desc_idProduct.attr, |
| 303 | &gadget_cdev_desc_bcdDevice.attr, |
| 304 | &gadget_cdev_desc_bcdUSB.attr, |
| 305 | &gadget_cdev_desc_UDC.attr, |
| 306 | NULL, |
| 307 | }; |
| 308 | |
| 309 | static inline struct gadget_info *to_gadget_info(struct config_item *item) |
| 310 | { |
| 311 | return container_of(to_config_group(item), struct gadget_info, group); |
| 312 | } |
| 313 | |
| 314 | static inline struct gadget_strings *to_gadget_strings(struct config_item *item) |
| 315 | { |
| 316 | return container_of(to_config_group(item), struct gadget_strings, |
| 317 | group); |
| 318 | } |
| 319 | |
| 320 | static inline struct gadget_config_name *to_gadget_config_name( |
| 321 | struct config_item *item) |
| 322 | { |
| 323 | return container_of(to_config_group(item), struct gadget_config_name, |
| 324 | group); |
| 325 | } |
| 326 | |
| 327 | static inline struct config_usb_cfg *to_config_usb_cfg(struct config_item *item) |
| 328 | { |
| 329 | return container_of(to_config_group(item), struct config_usb_cfg, |
| 330 | group); |
| 331 | } |
| 332 | |
| 333 | static inline struct usb_function_instance *to_usb_function_instance( |
| 334 | struct config_item *item) |
| 335 | { |
| 336 | return container_of(to_config_group(item), |
| 337 | struct usb_function_instance, group); |
| 338 | } |
| 339 | |
| 340 | static void gadget_info_attr_release(struct config_item *item) |
| 341 | { |
| 342 | struct gadget_info *gi = to_gadget_info(item); |
| 343 | |
| 344 | WARN_ON(!list_empty(&gi->cdev.configs)); |
| 345 | WARN_ON(!list_empty(&gi->string_list)); |
| 346 | WARN_ON(!list_empty(&gi->available_func)); |
| 347 | kfree(gi->composite.gadget_driver.function); |
| 348 | kfree(gi); |
| 349 | } |
| 350 | |
| 351 | CONFIGFS_ATTR_OPS(gadget_info); |
| 352 | |
| 353 | static struct configfs_item_operations gadget_root_item_ops = { |
| 354 | .release = gadget_info_attr_release, |
| 355 | .show_attribute = gadget_info_attr_show, |
| 356 | .store_attribute = gadget_info_attr_store, |
| 357 | }; |
| 358 | |
| 359 | static void gadget_config_attr_release(struct config_item *item) |
| 360 | { |
| 361 | struct config_usb_cfg *cfg = to_config_usb_cfg(item); |
| 362 | |
| 363 | WARN_ON(!list_empty(&cfg->c.functions)); |
| 364 | list_del(&cfg->c.list); |
| 365 | kfree(cfg->c.label); |
| 366 | kfree(cfg); |
| 367 | } |
| 368 | |
| 369 | static int config_usb_cfg_link( |
| 370 | struct config_item *usb_cfg_ci, |
| 371 | struct config_item *usb_func_ci) |
| 372 | { |
| 373 | struct config_usb_cfg *cfg = to_config_usb_cfg(usb_cfg_ci); |
| 374 | struct usb_composite_dev *cdev = cfg->c.cdev; |
| 375 | struct gadget_info *gi = container_of(cdev, struct gadget_info, cdev); |
| 376 | |
| 377 | struct config_group *group = to_config_group(usb_func_ci); |
| 378 | struct usb_function_instance *fi = container_of(group, |
| 379 | struct usb_function_instance, group); |
| 380 | struct usb_function_instance *a_fi; |
| 381 | struct usb_function *f; |
| 382 | int ret; |
| 383 | |
| 384 | mutex_lock(&gi->lock); |
| 385 | /* |
| 386 | * Make sure this function is from within our _this_ gadget and not |
| 387 | * from another gadget or a random directory. |
| 388 | * Also a function instance can only be linked once. |
| 389 | */ |
| 390 | list_for_each_entry(a_fi, &gi->available_func, cfs_list) { |
| 391 | if (a_fi == fi) |
| 392 | break; |
| 393 | } |
| 394 | if (a_fi != fi) { |
| 395 | ret = -EINVAL; |
| 396 | goto out; |
| 397 | } |
| 398 | |
| 399 | list_for_each_entry(f, &cfg->func_list, list) { |
| 400 | if (f->fi == fi) { |
| 401 | ret = -EEXIST; |
| 402 | goto out; |
| 403 | } |
| 404 | } |
| 405 | |
| 406 | f = usb_get_function(fi); |
| 407 | if (IS_ERR(f)) { |
| 408 | ret = PTR_ERR(f); |
| 409 | goto out; |
| 410 | } |
| 411 | |
| 412 | /* stash the function until we bind it to the gadget */ |
| 413 | list_add_tail(&f->list, &cfg->func_list); |
| 414 | ret = 0; |
| 415 | out: |
| 416 | mutex_unlock(&gi->lock); |
| 417 | return ret; |
| 418 | } |
| 419 | |
| 420 | static int config_usb_cfg_unlink( |
| 421 | struct config_item *usb_cfg_ci, |
| 422 | struct config_item *usb_func_ci) |
| 423 | { |
| 424 | struct config_usb_cfg *cfg = to_config_usb_cfg(usb_cfg_ci); |
| 425 | struct usb_composite_dev *cdev = cfg->c.cdev; |
| 426 | struct gadget_info *gi = container_of(cdev, struct gadget_info, cdev); |
| 427 | |
| 428 | struct config_group *group = to_config_group(usb_func_ci); |
| 429 | struct usb_function_instance *fi = container_of(group, |
| 430 | struct usb_function_instance, group); |
| 431 | struct usb_function *f; |
| 432 | |
| 433 | /* |
| 434 | * ideally I would like to forbid to unlink functions while a gadget is |
| 435 | * bound to an UDC. Since this isn't possible at the moment, we simply |
| 436 | * force an unbind, the function is available here and then we can |
| 437 | * remove the function. |
| 438 | */ |
| 439 | mutex_lock(&gi->lock); |
| 440 | if (gi->udc_name) |
| 441 | unregister_gadget(gi); |
| 442 | WARN_ON(gi->udc_name); |
| 443 | |
| 444 | list_for_each_entry(f, &cfg->func_list, list) { |
| 445 | if (f->fi == fi) { |
| 446 | list_del(&f->list); |
| 447 | usb_put_function(f); |
| 448 | mutex_unlock(&gi->lock); |
| 449 | return 0; |
| 450 | } |
| 451 | } |
| 452 | mutex_unlock(&gi->lock); |
David Rientjes | 75bfe23 | 2013-04-07 14:11:47 -0700 | [diff] [blame] | 453 | WARN(1, "Unable to locate function to unbind\n"); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 454 | return 0; |
| 455 | } |
| 456 | |
| 457 | CONFIGFS_ATTR_OPS(config_usb_cfg); |
| 458 | |
| 459 | static struct configfs_item_operations gadget_config_item_ops = { |
| 460 | .release = gadget_config_attr_release, |
| 461 | .show_attribute = config_usb_cfg_attr_show, |
| 462 | .store_attribute = config_usb_cfg_attr_store, |
| 463 | .allow_link = config_usb_cfg_link, |
| 464 | .drop_link = config_usb_cfg_unlink, |
| 465 | }; |
| 466 | |
| 467 | |
| 468 | static ssize_t gadget_config_desc_MaxPower_show(struct config_usb_cfg *cfg, |
| 469 | char *page) |
| 470 | { |
| 471 | return sprintf(page, "%u\n", cfg->c.MaxPower); |
| 472 | } |
| 473 | |
| 474 | static ssize_t gadget_config_desc_MaxPower_store(struct config_usb_cfg *cfg, |
| 475 | const char *page, size_t len) |
| 476 | { |
| 477 | u16 val; |
| 478 | int ret; |
| 479 | ret = kstrtou16(page, 0, &val); |
| 480 | if (ret) |
| 481 | return ret; |
| 482 | if (DIV_ROUND_UP(val, 8) > 0xff) |
| 483 | return -ERANGE; |
| 484 | cfg->c.MaxPower = val; |
| 485 | return len; |
| 486 | } |
| 487 | |
| 488 | static ssize_t gadget_config_desc_bmAttributes_show(struct config_usb_cfg *cfg, |
| 489 | char *page) |
| 490 | { |
| 491 | return sprintf(page, "0x%02x\n", cfg->c.bmAttributes); |
| 492 | } |
| 493 | |
| 494 | static ssize_t gadget_config_desc_bmAttributes_store(struct config_usb_cfg *cfg, |
| 495 | const char *page, size_t len) |
| 496 | { |
| 497 | u8 val; |
| 498 | int ret; |
| 499 | ret = kstrtou8(page, 0, &val); |
| 500 | if (ret) |
| 501 | return ret; |
| 502 | if (!(val & USB_CONFIG_ATT_ONE)) |
| 503 | return -EINVAL; |
| 504 | if (val & ~(USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER | |
| 505 | USB_CONFIG_ATT_WAKEUP)) |
| 506 | return -EINVAL; |
| 507 | cfg->c.bmAttributes = val; |
| 508 | return len; |
| 509 | } |
| 510 | |
| 511 | #define CFG_CONFIG_DESC_ITEM_ATTR(name) \ |
| 512 | static struct config_usb_cfg_attribute gadget_usb_cfg_##name = \ |
| 513 | __CONFIGFS_ATTR(name, S_IRUGO | S_IWUSR, \ |
| 514 | gadget_config_desc_##name##_show, \ |
| 515 | gadget_config_desc_##name##_store) |
| 516 | |
| 517 | CFG_CONFIG_DESC_ITEM_ATTR(MaxPower); |
| 518 | CFG_CONFIG_DESC_ITEM_ATTR(bmAttributes); |
| 519 | |
| 520 | static struct configfs_attribute *gadget_config_attrs[] = { |
| 521 | &gadget_usb_cfg_MaxPower.attr, |
| 522 | &gadget_usb_cfg_bmAttributes.attr, |
| 523 | NULL, |
| 524 | }; |
| 525 | |
| 526 | static struct config_item_type gadget_config_type = { |
| 527 | .ct_item_ops = &gadget_config_item_ops, |
| 528 | .ct_attrs = gadget_config_attrs, |
| 529 | .ct_owner = THIS_MODULE, |
| 530 | }; |
| 531 | |
| 532 | static struct config_item_type gadget_root_type = { |
| 533 | .ct_item_ops = &gadget_root_item_ops, |
| 534 | .ct_attrs = gadget_root_attrs, |
| 535 | .ct_owner = THIS_MODULE, |
| 536 | }; |
| 537 | |
| 538 | static void composite_init_dev(struct usb_composite_dev *cdev) |
| 539 | { |
| 540 | spin_lock_init(&cdev->lock); |
| 541 | INIT_LIST_HEAD(&cdev->configs); |
| 542 | INIT_LIST_HEAD(&cdev->gstrings); |
| 543 | } |
| 544 | |
| 545 | static struct config_group *function_make( |
| 546 | struct config_group *group, |
| 547 | const char *name) |
| 548 | { |
| 549 | struct gadget_info *gi; |
| 550 | struct usb_function_instance *fi; |
| 551 | char buf[MAX_NAME_LEN]; |
| 552 | char *func_name; |
| 553 | char *instance_name; |
| 554 | int ret; |
| 555 | |
| 556 | ret = snprintf(buf, MAX_NAME_LEN, "%s", name); |
| 557 | if (ret >= MAX_NAME_LEN) |
| 558 | return ERR_PTR(-ENAMETOOLONG); |
| 559 | |
| 560 | func_name = buf; |
| 561 | instance_name = strchr(func_name, '.'); |
| 562 | if (!instance_name) { |
| 563 | pr_err("Unable to locate . in FUNC.INSTANCE\n"); |
| 564 | return ERR_PTR(-EINVAL); |
| 565 | } |
| 566 | *instance_name = '\0'; |
| 567 | instance_name++; |
| 568 | |
| 569 | fi = usb_get_function_instance(func_name); |
| 570 | if (IS_ERR(fi)) |
Duan Jiong | a346941 | 2013-09-26 15:55:25 +0800 | [diff] [blame] | 571 | return ERR_CAST(fi); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 572 | |
Nicolas Iooss | 3958b79 | 2015-07-17 16:23:45 -0700 | [diff] [blame] | 573 | ret = config_item_set_name(&fi->group.cg_item, "%s", name); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 574 | if (ret) { |
| 575 | usb_put_function_instance(fi); |
| 576 | return ERR_PTR(ret); |
| 577 | } |
Andrzej Pietrasiewicz | 1933861 | 2013-12-03 15:15:21 +0100 | [diff] [blame] | 578 | if (fi->set_inst_name) { |
| 579 | ret = fi->set_inst_name(fi, instance_name); |
| 580 | if (ret) { |
| 581 | usb_put_function_instance(fi); |
| 582 | return ERR_PTR(ret); |
| 583 | } |
| 584 | } |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 585 | |
| 586 | gi = container_of(group, struct gadget_info, functions_group); |
| 587 | |
| 588 | mutex_lock(&gi->lock); |
| 589 | list_add_tail(&fi->cfs_list, &gi->available_func); |
| 590 | mutex_unlock(&gi->lock); |
| 591 | return &fi->group; |
| 592 | } |
| 593 | |
| 594 | static void function_drop( |
| 595 | struct config_group *group, |
| 596 | struct config_item *item) |
| 597 | { |
| 598 | struct usb_function_instance *fi = to_usb_function_instance(item); |
| 599 | struct gadget_info *gi; |
| 600 | |
| 601 | gi = container_of(group, struct gadget_info, functions_group); |
| 602 | |
| 603 | mutex_lock(&gi->lock); |
| 604 | list_del(&fi->cfs_list); |
| 605 | mutex_unlock(&gi->lock); |
| 606 | config_item_put(item); |
| 607 | } |
| 608 | |
| 609 | static struct configfs_group_operations functions_ops = { |
| 610 | .make_group = &function_make, |
| 611 | .drop_item = &function_drop, |
| 612 | }; |
| 613 | |
| 614 | static struct config_item_type functions_type = { |
| 615 | .ct_group_ops = &functions_ops, |
| 616 | .ct_owner = THIS_MODULE, |
| 617 | }; |
| 618 | |
| 619 | CONFIGFS_ATTR_STRUCT(gadget_config_name); |
| 620 | GS_STRINGS_RW(gadget_config_name, configuration); |
| 621 | |
| 622 | static struct configfs_attribute *gadget_config_name_langid_attrs[] = { |
| 623 | &gadget_config_name_configuration.attr, |
| 624 | NULL, |
| 625 | }; |
| 626 | |
| 627 | static void gadget_config_name_attr_release(struct config_item *item) |
| 628 | { |
| 629 | struct gadget_config_name *cn = to_gadget_config_name(item); |
| 630 | |
| 631 | kfree(cn->configuration); |
| 632 | |
| 633 | list_del(&cn->list); |
| 634 | kfree(cn); |
| 635 | } |
| 636 | |
| 637 | USB_CONFIG_STRING_RW_OPS(gadget_config_name); |
| 638 | USB_CONFIG_STRINGS_LANG(gadget_config_name, config_usb_cfg); |
| 639 | |
| 640 | static struct config_group *config_desc_make( |
| 641 | struct config_group *group, |
| 642 | const char *name) |
| 643 | { |
| 644 | struct gadget_info *gi; |
| 645 | struct config_usb_cfg *cfg; |
| 646 | char buf[MAX_NAME_LEN]; |
| 647 | char *num_str; |
| 648 | u8 num; |
| 649 | int ret; |
| 650 | |
| 651 | gi = container_of(group, struct gadget_info, configs_group); |
| 652 | ret = snprintf(buf, MAX_NAME_LEN, "%s", name); |
| 653 | if (ret >= MAX_NAME_LEN) |
| 654 | return ERR_PTR(-ENAMETOOLONG); |
| 655 | |
| 656 | num_str = strchr(buf, '.'); |
| 657 | if (!num_str) { |
| 658 | pr_err("Unable to locate . in name.bConfigurationValue\n"); |
| 659 | return ERR_PTR(-EINVAL); |
| 660 | } |
| 661 | |
| 662 | *num_str = '\0'; |
| 663 | num_str++; |
| 664 | |
| 665 | if (!strlen(buf)) |
| 666 | return ERR_PTR(-EINVAL); |
| 667 | |
| 668 | ret = kstrtou8(num_str, 0, &num); |
| 669 | if (ret) |
| 670 | return ERR_PTR(ret); |
| 671 | |
| 672 | cfg = kzalloc(sizeof(*cfg), GFP_KERNEL); |
| 673 | if (!cfg) |
| 674 | return ERR_PTR(-ENOMEM); |
| 675 | cfg->c.label = kstrdup(buf, GFP_KERNEL); |
| 676 | if (!cfg->c.label) { |
| 677 | ret = -ENOMEM; |
| 678 | goto err; |
| 679 | } |
| 680 | cfg->c.bConfigurationValue = num; |
| 681 | cfg->c.MaxPower = CONFIG_USB_GADGET_VBUS_DRAW; |
| 682 | cfg->c.bmAttributes = USB_CONFIG_ATT_ONE; |
| 683 | INIT_LIST_HEAD(&cfg->string_list); |
| 684 | INIT_LIST_HEAD(&cfg->func_list); |
| 685 | |
| 686 | cfg->group.default_groups = cfg->default_groups; |
| 687 | cfg->default_groups[0] = &cfg->strings_group; |
| 688 | |
| 689 | config_group_init_type_name(&cfg->group, name, |
| 690 | &gadget_config_type); |
| 691 | config_group_init_type_name(&cfg->strings_group, "strings", |
| 692 | &gadget_config_name_strings_type); |
| 693 | |
| 694 | ret = usb_add_config_only(&gi->cdev, &cfg->c); |
| 695 | if (ret) |
| 696 | goto err; |
| 697 | |
| 698 | return &cfg->group; |
| 699 | err: |
| 700 | kfree(cfg->c.label); |
| 701 | kfree(cfg); |
| 702 | return ERR_PTR(ret); |
| 703 | } |
| 704 | |
| 705 | static void config_desc_drop( |
| 706 | struct config_group *group, |
| 707 | struct config_item *item) |
| 708 | { |
| 709 | config_item_put(item); |
| 710 | } |
| 711 | |
| 712 | static struct configfs_group_operations config_desc_ops = { |
| 713 | .make_group = &config_desc_make, |
| 714 | .drop_item = &config_desc_drop, |
| 715 | }; |
| 716 | |
| 717 | static struct config_item_type config_desc_type = { |
| 718 | .ct_group_ops = &config_desc_ops, |
| 719 | .ct_owner = THIS_MODULE, |
| 720 | }; |
| 721 | |
| 722 | CONFIGFS_ATTR_STRUCT(gadget_strings); |
| 723 | GS_STRINGS_RW(gadget_strings, manufacturer); |
| 724 | GS_STRINGS_RW(gadget_strings, product); |
| 725 | GS_STRINGS_RW(gadget_strings, serialnumber); |
| 726 | |
| 727 | static struct configfs_attribute *gadget_strings_langid_attrs[] = { |
| 728 | &gadget_strings_manufacturer.attr, |
| 729 | &gadget_strings_product.attr, |
| 730 | &gadget_strings_serialnumber.attr, |
| 731 | NULL, |
| 732 | }; |
| 733 | |
| 734 | static void gadget_strings_attr_release(struct config_item *item) |
| 735 | { |
| 736 | struct gadget_strings *gs = to_gadget_strings(item); |
| 737 | |
| 738 | kfree(gs->manufacturer); |
| 739 | kfree(gs->product); |
| 740 | kfree(gs->serialnumber); |
| 741 | |
| 742 | list_del(&gs->list); |
| 743 | kfree(gs); |
| 744 | } |
| 745 | |
| 746 | USB_CONFIG_STRING_RW_OPS(gadget_strings); |
| 747 | USB_CONFIG_STRINGS_LANG(gadget_strings, gadget_info); |
| 748 | |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 749 | static inline struct os_desc *to_os_desc(struct config_item *item) |
| 750 | { |
| 751 | return container_of(to_config_group(item), struct os_desc, group); |
| 752 | } |
| 753 | |
| 754 | CONFIGFS_ATTR_STRUCT(os_desc); |
| 755 | CONFIGFS_ATTR_OPS(os_desc); |
| 756 | |
| 757 | static ssize_t os_desc_use_show(struct os_desc *os_desc, char *page) |
| 758 | { |
| 759 | struct gadget_info *gi; |
| 760 | |
| 761 | gi = to_gadget_info(os_desc->group.cg_item.ci_parent); |
| 762 | |
| 763 | return sprintf(page, "%d", gi->use_os_desc); |
| 764 | } |
| 765 | |
| 766 | static ssize_t os_desc_use_store(struct os_desc *os_desc, const char *page, |
| 767 | size_t len) |
| 768 | { |
| 769 | struct gadget_info *gi; |
| 770 | int ret; |
| 771 | bool use; |
| 772 | |
| 773 | gi = to_gadget_info(os_desc->group.cg_item.ci_parent); |
| 774 | |
| 775 | mutex_lock(&gi->lock); |
| 776 | ret = strtobool(page, &use); |
| 777 | if (!ret) { |
| 778 | gi->use_os_desc = use; |
| 779 | ret = len; |
| 780 | } |
| 781 | mutex_unlock(&gi->lock); |
| 782 | |
| 783 | return ret; |
| 784 | } |
| 785 | |
| 786 | static struct os_desc_attribute os_desc_use = |
| 787 | __CONFIGFS_ATTR(use, S_IRUGO | S_IWUSR, |
| 788 | os_desc_use_show, |
| 789 | os_desc_use_store); |
| 790 | |
| 791 | static ssize_t os_desc_b_vendor_code_show(struct os_desc *os_desc, char *page) |
| 792 | { |
| 793 | struct gadget_info *gi; |
| 794 | |
| 795 | gi = to_gadget_info(os_desc->group.cg_item.ci_parent); |
| 796 | |
| 797 | return sprintf(page, "%d", gi->b_vendor_code); |
| 798 | } |
| 799 | |
| 800 | static ssize_t os_desc_b_vendor_code_store(struct os_desc *os_desc, |
| 801 | const char *page, size_t len) |
| 802 | { |
| 803 | struct gadget_info *gi; |
| 804 | int ret; |
| 805 | u8 b_vendor_code; |
| 806 | |
| 807 | gi = to_gadget_info(os_desc->group.cg_item.ci_parent); |
| 808 | |
| 809 | mutex_lock(&gi->lock); |
| 810 | ret = kstrtou8(page, 0, &b_vendor_code); |
| 811 | if (!ret) { |
| 812 | gi->b_vendor_code = b_vendor_code; |
| 813 | ret = len; |
| 814 | } |
| 815 | mutex_unlock(&gi->lock); |
| 816 | |
| 817 | return ret; |
| 818 | } |
| 819 | |
| 820 | static struct os_desc_attribute os_desc_b_vendor_code = |
| 821 | __CONFIGFS_ATTR(b_vendor_code, S_IRUGO | S_IWUSR, |
| 822 | os_desc_b_vendor_code_show, |
| 823 | os_desc_b_vendor_code_store); |
| 824 | |
| 825 | static ssize_t os_desc_qw_sign_show(struct os_desc *os_desc, char *page) |
| 826 | { |
| 827 | struct gadget_info *gi; |
| 828 | |
| 829 | gi = to_gadget_info(os_desc->group.cg_item.ci_parent); |
| 830 | |
| 831 | memcpy(page, gi->qw_sign, OS_STRING_QW_SIGN_LEN); |
| 832 | |
| 833 | return OS_STRING_QW_SIGN_LEN; |
| 834 | } |
| 835 | |
| 836 | static ssize_t os_desc_qw_sign_store(struct os_desc *os_desc, const char *page, |
| 837 | size_t len) |
| 838 | { |
| 839 | struct gadget_info *gi; |
| 840 | int res, l; |
| 841 | |
| 842 | gi = to_gadget_info(os_desc->group.cg_item.ci_parent); |
| 843 | l = min((int)len, OS_STRING_QW_SIGN_LEN >> 1); |
| 844 | if (page[l - 1] == '\n') |
| 845 | --l; |
| 846 | |
| 847 | mutex_lock(&gi->lock); |
| 848 | res = utf8s_to_utf16s(page, l, |
| 849 | UTF16_LITTLE_ENDIAN, (wchar_t *) gi->qw_sign, |
| 850 | OS_STRING_QW_SIGN_LEN); |
| 851 | if (res > 0) |
| 852 | res = len; |
| 853 | mutex_unlock(&gi->lock); |
| 854 | |
| 855 | return res; |
| 856 | } |
| 857 | |
| 858 | static struct os_desc_attribute os_desc_qw_sign = |
| 859 | __CONFIGFS_ATTR(qw_sign, S_IRUGO | S_IWUSR, |
| 860 | os_desc_qw_sign_show, |
| 861 | os_desc_qw_sign_store); |
| 862 | |
| 863 | static struct configfs_attribute *os_desc_attrs[] = { |
| 864 | &os_desc_use.attr, |
| 865 | &os_desc_b_vendor_code.attr, |
| 866 | &os_desc_qw_sign.attr, |
| 867 | NULL, |
| 868 | }; |
| 869 | |
| 870 | static void os_desc_attr_release(struct config_item *item) |
| 871 | { |
| 872 | struct os_desc *os_desc = to_os_desc(item); |
| 873 | kfree(os_desc); |
| 874 | } |
| 875 | |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 876 | static int os_desc_link(struct config_item *os_desc_ci, |
| 877 | struct config_item *usb_cfg_ci) |
| 878 | { |
| 879 | struct gadget_info *gi = container_of(to_config_group(os_desc_ci), |
| 880 | struct gadget_info, os_desc_group); |
| 881 | struct usb_composite_dev *cdev = &gi->cdev; |
| 882 | struct config_usb_cfg *c_target = |
| 883 | container_of(to_config_group(usb_cfg_ci), |
| 884 | struct config_usb_cfg, group); |
| 885 | struct usb_configuration *c; |
| 886 | int ret; |
| 887 | |
| 888 | mutex_lock(&gi->lock); |
| 889 | list_for_each_entry(c, &cdev->configs, list) { |
| 890 | if (c == &c_target->c) |
| 891 | break; |
| 892 | } |
| 893 | if (c != &c_target->c) { |
| 894 | ret = -EINVAL; |
| 895 | goto out; |
| 896 | } |
| 897 | |
| 898 | if (cdev->os_desc_config) { |
| 899 | ret = -EBUSY; |
| 900 | goto out; |
| 901 | } |
| 902 | |
| 903 | cdev->os_desc_config = &c_target->c; |
| 904 | ret = 0; |
| 905 | |
| 906 | out: |
| 907 | mutex_unlock(&gi->lock); |
| 908 | return ret; |
| 909 | } |
| 910 | |
| 911 | static int os_desc_unlink(struct config_item *os_desc_ci, |
| 912 | struct config_item *usb_cfg_ci) |
| 913 | { |
| 914 | struct gadget_info *gi = container_of(to_config_group(os_desc_ci), |
| 915 | struct gadget_info, os_desc_group); |
| 916 | struct usb_composite_dev *cdev = &gi->cdev; |
| 917 | |
| 918 | mutex_lock(&gi->lock); |
| 919 | if (gi->udc_name) |
| 920 | unregister_gadget(gi); |
| 921 | cdev->os_desc_config = NULL; |
| 922 | WARN_ON(gi->udc_name); |
| 923 | mutex_unlock(&gi->lock); |
| 924 | return 0; |
| 925 | } |
| 926 | |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 927 | static struct configfs_item_operations os_desc_ops = { |
| 928 | .release = os_desc_attr_release, |
| 929 | .show_attribute = os_desc_attr_show, |
| 930 | .store_attribute = os_desc_attr_store, |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 931 | .allow_link = os_desc_link, |
| 932 | .drop_link = os_desc_unlink, |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 933 | }; |
| 934 | |
| 935 | static struct config_item_type os_desc_type = { |
| 936 | .ct_item_ops = &os_desc_ops, |
| 937 | .ct_attrs = os_desc_attrs, |
| 938 | .ct_owner = THIS_MODULE, |
| 939 | }; |
| 940 | |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 941 | CONFIGFS_ATTR_STRUCT(usb_os_desc); |
| 942 | CONFIGFS_ATTR_OPS(usb_os_desc); |
| 943 | |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 944 | |
| 945 | static inline struct usb_os_desc_ext_prop |
| 946 | *to_usb_os_desc_ext_prop(struct config_item *item) |
| 947 | { |
| 948 | return container_of(item, struct usb_os_desc_ext_prop, item); |
| 949 | } |
| 950 | |
| 951 | CONFIGFS_ATTR_STRUCT(usb_os_desc_ext_prop); |
| 952 | CONFIGFS_ATTR_OPS(usb_os_desc_ext_prop); |
| 953 | |
| 954 | static ssize_t ext_prop_type_show(struct usb_os_desc_ext_prop *ext_prop, |
| 955 | char *page) |
| 956 | { |
| 957 | return sprintf(page, "%d", ext_prop->type); |
| 958 | } |
| 959 | |
| 960 | static ssize_t ext_prop_type_store(struct usb_os_desc_ext_prop *ext_prop, |
| 961 | const char *page, size_t len) |
| 962 | { |
| 963 | struct usb_os_desc *desc = to_usb_os_desc(ext_prop->item.ci_parent); |
| 964 | u8 type; |
| 965 | int ret; |
| 966 | |
| 967 | if (desc->opts_mutex) |
| 968 | mutex_lock(desc->opts_mutex); |
| 969 | ret = kstrtou8(page, 0, &type); |
| 970 | if (ret) |
| 971 | goto end; |
| 972 | if (type < USB_EXT_PROP_UNICODE || type > USB_EXT_PROP_UNICODE_MULTI) { |
| 973 | ret = -EINVAL; |
| 974 | goto end; |
| 975 | } |
| 976 | |
| 977 | if ((ext_prop->type == USB_EXT_PROP_BINARY || |
| 978 | ext_prop->type == USB_EXT_PROP_LE32 || |
| 979 | ext_prop->type == USB_EXT_PROP_BE32) && |
| 980 | (type == USB_EXT_PROP_UNICODE || |
| 981 | type == USB_EXT_PROP_UNICODE_ENV || |
| 982 | type == USB_EXT_PROP_UNICODE_LINK)) |
| 983 | ext_prop->data_len <<= 1; |
| 984 | else if ((ext_prop->type == USB_EXT_PROP_UNICODE || |
| 985 | ext_prop->type == USB_EXT_PROP_UNICODE_ENV || |
| 986 | ext_prop->type == USB_EXT_PROP_UNICODE_LINK) && |
| 987 | (type == USB_EXT_PROP_BINARY || |
| 988 | type == USB_EXT_PROP_LE32 || |
| 989 | type == USB_EXT_PROP_BE32)) |
| 990 | ext_prop->data_len >>= 1; |
| 991 | ext_prop->type = type; |
| 992 | ret = len; |
| 993 | |
| 994 | end: |
| 995 | if (desc->opts_mutex) |
| 996 | mutex_unlock(desc->opts_mutex); |
| 997 | return ret; |
| 998 | } |
| 999 | |
| 1000 | static ssize_t ext_prop_data_show(struct usb_os_desc_ext_prop *ext_prop, |
| 1001 | char *page) |
| 1002 | { |
| 1003 | int len = ext_prop->data_len; |
| 1004 | |
| 1005 | if (ext_prop->type == USB_EXT_PROP_UNICODE || |
| 1006 | ext_prop->type == USB_EXT_PROP_UNICODE_ENV || |
| 1007 | ext_prop->type == USB_EXT_PROP_UNICODE_LINK) |
| 1008 | len >>= 1; |
| 1009 | memcpy(page, ext_prop->data, len); |
| 1010 | |
| 1011 | return len; |
| 1012 | } |
| 1013 | |
| 1014 | static ssize_t ext_prop_data_store(struct usb_os_desc_ext_prop *ext_prop, |
| 1015 | const char *page, size_t len) |
| 1016 | { |
| 1017 | struct usb_os_desc *desc = to_usb_os_desc(ext_prop->item.ci_parent); |
| 1018 | char *new_data; |
| 1019 | size_t ret_len = len; |
| 1020 | |
| 1021 | if (page[len - 1] == '\n' || page[len - 1] == '\0') |
| 1022 | --len; |
Benoit Taine | 58b949e | 2014-05-26 17:21:20 +0200 | [diff] [blame] | 1023 | new_data = kmemdup(page, len, GFP_KERNEL); |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 1024 | if (!new_data) |
| 1025 | return -ENOMEM; |
| 1026 | |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 1027 | if (desc->opts_mutex) |
| 1028 | mutex_lock(desc->opts_mutex); |
| 1029 | kfree(ext_prop->data); |
| 1030 | ext_prop->data = new_data; |
| 1031 | desc->ext_prop_len -= ext_prop->data_len; |
| 1032 | ext_prop->data_len = len; |
| 1033 | desc->ext_prop_len += ext_prop->data_len; |
| 1034 | if (ext_prop->type == USB_EXT_PROP_UNICODE || |
| 1035 | ext_prop->type == USB_EXT_PROP_UNICODE_ENV || |
| 1036 | ext_prop->type == USB_EXT_PROP_UNICODE_LINK) { |
| 1037 | desc->ext_prop_len -= ext_prop->data_len; |
| 1038 | ext_prop->data_len <<= 1; |
| 1039 | ext_prop->data_len += 2; |
| 1040 | desc->ext_prop_len += ext_prop->data_len; |
| 1041 | } |
| 1042 | if (desc->opts_mutex) |
| 1043 | mutex_unlock(desc->opts_mutex); |
| 1044 | return ret_len; |
| 1045 | } |
| 1046 | |
| 1047 | static struct usb_os_desc_ext_prop_attribute ext_prop_type = |
| 1048 | __CONFIGFS_ATTR(type, S_IRUGO | S_IWUSR, |
| 1049 | ext_prop_type_show, ext_prop_type_store); |
| 1050 | |
| 1051 | static struct usb_os_desc_ext_prop_attribute ext_prop_data = |
| 1052 | __CONFIGFS_ATTR(data, S_IRUGO | S_IWUSR, |
| 1053 | ext_prop_data_show, ext_prop_data_store); |
| 1054 | |
| 1055 | static struct configfs_attribute *ext_prop_attrs[] = { |
| 1056 | &ext_prop_type.attr, |
| 1057 | &ext_prop_data.attr, |
| 1058 | NULL, |
| 1059 | }; |
| 1060 | |
| 1061 | static void usb_os_desc_ext_prop_release(struct config_item *item) |
| 1062 | { |
| 1063 | struct usb_os_desc_ext_prop *ext_prop = to_usb_os_desc_ext_prop(item); |
| 1064 | |
| 1065 | kfree(ext_prop); /* frees a whole chunk */ |
| 1066 | } |
| 1067 | |
| 1068 | static struct configfs_item_operations ext_prop_ops = { |
| 1069 | .release = usb_os_desc_ext_prop_release, |
| 1070 | .show_attribute = usb_os_desc_ext_prop_attr_show, |
| 1071 | .store_attribute = usb_os_desc_ext_prop_attr_store, |
| 1072 | }; |
| 1073 | |
| 1074 | static struct config_item *ext_prop_make( |
| 1075 | struct config_group *group, |
| 1076 | const char *name) |
| 1077 | { |
| 1078 | struct usb_os_desc_ext_prop *ext_prop; |
| 1079 | struct config_item_type *ext_prop_type; |
| 1080 | struct usb_os_desc *desc; |
| 1081 | char *vlabuf; |
| 1082 | |
| 1083 | vla_group(data_chunk); |
| 1084 | vla_item(data_chunk, struct usb_os_desc_ext_prop, ext_prop, 1); |
| 1085 | vla_item(data_chunk, struct config_item_type, ext_prop_type, 1); |
| 1086 | |
| 1087 | vlabuf = kzalloc(vla_group_size(data_chunk), GFP_KERNEL); |
| 1088 | if (!vlabuf) |
| 1089 | return ERR_PTR(-ENOMEM); |
| 1090 | |
| 1091 | ext_prop = vla_ptr(vlabuf, data_chunk, ext_prop); |
| 1092 | ext_prop_type = vla_ptr(vlabuf, data_chunk, ext_prop_type); |
| 1093 | |
| 1094 | desc = container_of(group, struct usb_os_desc, group); |
| 1095 | ext_prop_type->ct_item_ops = &ext_prop_ops; |
| 1096 | ext_prop_type->ct_attrs = ext_prop_attrs; |
| 1097 | ext_prop_type->ct_owner = desc->owner; |
| 1098 | |
| 1099 | config_item_init_type_name(&ext_prop->item, name, ext_prop_type); |
| 1100 | |
| 1101 | ext_prop->name = kstrdup(name, GFP_KERNEL); |
| 1102 | if (!ext_prop->name) { |
| 1103 | kfree(vlabuf); |
| 1104 | return ERR_PTR(-ENOMEM); |
| 1105 | } |
| 1106 | desc->ext_prop_len += 14; |
| 1107 | ext_prop->name_len = 2 * strlen(ext_prop->name) + 2; |
| 1108 | if (desc->opts_mutex) |
| 1109 | mutex_lock(desc->opts_mutex); |
| 1110 | desc->ext_prop_len += ext_prop->name_len; |
| 1111 | list_add_tail(&ext_prop->entry, &desc->ext_prop); |
| 1112 | ++desc->ext_prop_count; |
| 1113 | if (desc->opts_mutex) |
| 1114 | mutex_unlock(desc->opts_mutex); |
| 1115 | |
| 1116 | return &ext_prop->item; |
| 1117 | } |
| 1118 | |
| 1119 | static void ext_prop_drop(struct config_group *group, struct config_item *item) |
| 1120 | { |
| 1121 | struct usb_os_desc_ext_prop *ext_prop = to_usb_os_desc_ext_prop(item); |
| 1122 | struct usb_os_desc *desc = to_usb_os_desc(&group->cg_item); |
| 1123 | |
| 1124 | if (desc->opts_mutex) |
| 1125 | mutex_lock(desc->opts_mutex); |
| 1126 | list_del(&ext_prop->entry); |
| 1127 | --desc->ext_prop_count; |
| 1128 | kfree(ext_prop->name); |
| 1129 | desc->ext_prop_len -= (ext_prop->name_len + ext_prop->data_len + 14); |
| 1130 | if (desc->opts_mutex) |
| 1131 | mutex_unlock(desc->opts_mutex); |
| 1132 | config_item_put(item); |
| 1133 | } |
| 1134 | |
| 1135 | static struct configfs_group_operations interf_grp_ops = { |
| 1136 | .make_item = &ext_prop_make, |
| 1137 | .drop_item = &ext_prop_drop, |
| 1138 | }; |
| 1139 | |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1140 | static struct configfs_item_operations interf_item_ops = { |
| 1141 | .show_attribute = usb_os_desc_attr_show, |
| 1142 | .store_attribute = usb_os_desc_attr_store, |
| 1143 | }; |
| 1144 | |
Andrzej Pietrasiewicz | fe00b13 | 2014-06-18 14:24:48 +0200 | [diff] [blame] | 1145 | static ssize_t interf_grp_compatible_id_show(struct usb_os_desc *desc, |
| 1146 | char *page) |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1147 | { |
| 1148 | memcpy(page, desc->ext_compat_id, 8); |
| 1149 | return 8; |
| 1150 | } |
| 1151 | |
Andrzej Pietrasiewicz | fe00b13 | 2014-06-18 14:24:48 +0200 | [diff] [blame] | 1152 | static ssize_t interf_grp_compatible_id_store(struct usb_os_desc *desc, |
| 1153 | const char *page, size_t len) |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1154 | { |
| 1155 | int l; |
| 1156 | |
| 1157 | l = min_t(int, 8, len); |
| 1158 | if (page[l - 1] == '\n') |
| 1159 | --l; |
| 1160 | if (desc->opts_mutex) |
| 1161 | mutex_lock(desc->opts_mutex); |
| 1162 | memcpy(desc->ext_compat_id, page, l); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1163 | |
| 1164 | if (desc->opts_mutex) |
| 1165 | mutex_unlock(desc->opts_mutex); |
| 1166 | |
| 1167 | return len; |
| 1168 | } |
| 1169 | |
Andrzej Pietrasiewicz | fe00b13 | 2014-06-18 14:24:48 +0200 | [diff] [blame] | 1170 | static struct usb_os_desc_attribute interf_grp_attr_compatible_id = |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1171 | __CONFIGFS_ATTR(compatible_id, S_IRUGO | S_IWUSR, |
Andrzej Pietrasiewicz | fe00b13 | 2014-06-18 14:24:48 +0200 | [diff] [blame] | 1172 | interf_grp_compatible_id_show, |
| 1173 | interf_grp_compatible_id_store); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1174 | |
Andrzej Pietrasiewicz | fe00b13 | 2014-06-18 14:24:48 +0200 | [diff] [blame] | 1175 | static ssize_t interf_grp_sub_compatible_id_show(struct usb_os_desc *desc, |
| 1176 | char *page) |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1177 | { |
| 1178 | memcpy(page, desc->ext_compat_id + 8, 8); |
| 1179 | return 8; |
| 1180 | } |
| 1181 | |
Andrzej Pietrasiewicz | fe00b13 | 2014-06-18 14:24:48 +0200 | [diff] [blame] | 1182 | static ssize_t interf_grp_sub_compatible_id_store(struct usb_os_desc *desc, |
| 1183 | const char *page, size_t len) |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1184 | { |
| 1185 | int l; |
| 1186 | |
| 1187 | l = min_t(int, 8, len); |
| 1188 | if (page[l - 1] == '\n') |
| 1189 | --l; |
| 1190 | if (desc->opts_mutex) |
| 1191 | mutex_lock(desc->opts_mutex); |
| 1192 | memcpy(desc->ext_compat_id + 8, page, l); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1193 | |
| 1194 | if (desc->opts_mutex) |
| 1195 | mutex_unlock(desc->opts_mutex); |
| 1196 | |
| 1197 | return len; |
| 1198 | } |
| 1199 | |
Andrzej Pietrasiewicz | fe00b13 | 2014-06-18 14:24:48 +0200 | [diff] [blame] | 1200 | static struct usb_os_desc_attribute interf_grp_attr_sub_compatible_id = |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1201 | __CONFIGFS_ATTR(sub_compatible_id, S_IRUGO | S_IWUSR, |
Andrzej Pietrasiewicz | fe00b13 | 2014-06-18 14:24:48 +0200 | [diff] [blame] | 1202 | interf_grp_sub_compatible_id_show, |
| 1203 | interf_grp_sub_compatible_id_store); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1204 | |
| 1205 | static struct configfs_attribute *interf_grp_attrs[] = { |
Andrzej Pietrasiewicz | fe00b13 | 2014-06-18 14:24:48 +0200 | [diff] [blame] | 1206 | &interf_grp_attr_compatible_id.attr, |
| 1207 | &interf_grp_attr_sub_compatible_id.attr, |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1208 | NULL |
| 1209 | }; |
| 1210 | |
| 1211 | int usb_os_desc_prepare_interf_dir(struct config_group *parent, |
| 1212 | int n_interf, |
| 1213 | struct usb_os_desc **desc, |
Andrzej Pietrasiewicz | 14574b5 | 2014-06-18 14:24:49 +0200 | [diff] [blame] | 1214 | char **names, |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1215 | struct module *owner) |
| 1216 | { |
| 1217 | struct config_group **f_default_groups, *os_desc_group, |
| 1218 | **interface_groups; |
| 1219 | struct config_item_type *os_desc_type, *interface_type; |
| 1220 | |
| 1221 | vla_group(data_chunk); |
| 1222 | vla_item(data_chunk, struct config_group *, f_default_groups, 2); |
| 1223 | vla_item(data_chunk, struct config_group, os_desc_group, 1); |
| 1224 | vla_item(data_chunk, struct config_group *, interface_groups, |
| 1225 | n_interf + 1); |
| 1226 | vla_item(data_chunk, struct config_item_type, os_desc_type, 1); |
| 1227 | vla_item(data_chunk, struct config_item_type, interface_type, 1); |
| 1228 | |
| 1229 | char *vlabuf = kzalloc(vla_group_size(data_chunk), GFP_KERNEL); |
| 1230 | if (!vlabuf) |
| 1231 | return -ENOMEM; |
| 1232 | |
| 1233 | f_default_groups = vla_ptr(vlabuf, data_chunk, f_default_groups); |
| 1234 | os_desc_group = vla_ptr(vlabuf, data_chunk, os_desc_group); |
| 1235 | os_desc_type = vla_ptr(vlabuf, data_chunk, os_desc_type); |
| 1236 | interface_groups = vla_ptr(vlabuf, data_chunk, interface_groups); |
| 1237 | interface_type = vla_ptr(vlabuf, data_chunk, interface_type); |
| 1238 | |
| 1239 | parent->default_groups = f_default_groups; |
| 1240 | os_desc_type->ct_owner = owner; |
| 1241 | config_group_init_type_name(os_desc_group, "os_desc", os_desc_type); |
| 1242 | f_default_groups[0] = os_desc_group; |
| 1243 | |
| 1244 | os_desc_group->default_groups = interface_groups; |
| 1245 | interface_type->ct_item_ops = &interf_item_ops; |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 1246 | interface_type->ct_group_ops = &interf_grp_ops; |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1247 | interface_type->ct_attrs = interf_grp_attrs; |
| 1248 | interface_type->ct_owner = owner; |
| 1249 | |
| 1250 | while (n_interf--) { |
| 1251 | struct usb_os_desc *d; |
| 1252 | |
| 1253 | d = desc[n_interf]; |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 1254 | d->owner = owner; |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1255 | config_group_init_type_name(&d->group, "", interface_type); |
Andrzej Pietrasiewicz | 14574b5 | 2014-06-18 14:24:49 +0200 | [diff] [blame] | 1256 | config_item_set_name(&d->group.cg_item, "interface.%s", |
| 1257 | names[n_interf]); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1258 | interface_groups[n_interf] = &d->group; |
| 1259 | } |
| 1260 | |
| 1261 | return 0; |
| 1262 | } |
| 1263 | EXPORT_SYMBOL(usb_os_desc_prepare_interf_dir); |
| 1264 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1265 | static int configfs_do_nothing(struct usb_composite_dev *cdev) |
| 1266 | { |
David Rientjes | 75bfe23 | 2013-04-07 14:11:47 -0700 | [diff] [blame] | 1267 | WARN_ON(1); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1268 | return -EINVAL; |
| 1269 | } |
| 1270 | |
| 1271 | int composite_dev_prepare(struct usb_composite_driver *composite, |
| 1272 | struct usb_composite_dev *dev); |
| 1273 | |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1274 | int composite_os_desc_req_prepare(struct usb_composite_dev *cdev, |
| 1275 | struct usb_ep *ep0); |
| 1276 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1277 | static void purge_configs_funcs(struct gadget_info *gi) |
| 1278 | { |
| 1279 | struct usb_configuration *c; |
| 1280 | |
| 1281 | list_for_each_entry(c, &gi->cdev.configs, list) { |
| 1282 | struct usb_function *f, *tmp; |
| 1283 | struct config_usb_cfg *cfg; |
| 1284 | |
| 1285 | cfg = container_of(c, struct config_usb_cfg, c); |
| 1286 | |
| 1287 | list_for_each_entry_safe(f, tmp, &c->functions, list) { |
| 1288 | |
| 1289 | list_move_tail(&f->list, &cfg->func_list); |
| 1290 | if (f->unbind) { |
| 1291 | dev_err(&gi->cdev.gadget->dev, "unbind function" |
| 1292 | " '%s'/%p\n", f->name, f); |
| 1293 | f->unbind(c, f); |
| 1294 | } |
| 1295 | } |
| 1296 | c->next_interface_id = 0; |
Krzysztof Opasiak | 903124f | 2015-03-20 15:48:56 +0100 | [diff] [blame] | 1297 | memset(c->interface, 0, sizeof(c->interface)); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1298 | c->superspeed = 0; |
| 1299 | c->highspeed = 0; |
| 1300 | c->fullspeed = 0; |
| 1301 | } |
| 1302 | } |
| 1303 | |
| 1304 | static int configfs_composite_bind(struct usb_gadget *gadget, |
| 1305 | struct usb_gadget_driver *gdriver) |
| 1306 | { |
| 1307 | struct usb_composite_driver *composite = to_cdriver(gdriver); |
| 1308 | struct gadget_info *gi = container_of(composite, |
| 1309 | struct gadget_info, composite); |
| 1310 | struct usb_composite_dev *cdev = &gi->cdev; |
| 1311 | struct usb_configuration *c; |
| 1312 | struct usb_string *s; |
| 1313 | unsigned i; |
| 1314 | int ret; |
| 1315 | |
| 1316 | /* the gi->lock is hold by the caller */ |
| 1317 | cdev->gadget = gadget; |
| 1318 | set_gadget_data(gadget, cdev); |
| 1319 | ret = composite_dev_prepare(composite, cdev); |
| 1320 | if (ret) |
| 1321 | return ret; |
| 1322 | /* and now the gadget bind */ |
| 1323 | ret = -EINVAL; |
| 1324 | |
| 1325 | if (list_empty(&gi->cdev.configs)) { |
Peter Chen | 4d9f872 | 2014-05-05 07:39:34 +0800 | [diff] [blame] | 1326 | pr_err("Need at least one configuration in %s.\n", |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1327 | gi->composite.name); |
| 1328 | goto err_comp_cleanup; |
| 1329 | } |
| 1330 | |
| 1331 | |
| 1332 | list_for_each_entry(c, &gi->cdev.configs, list) { |
| 1333 | struct config_usb_cfg *cfg; |
| 1334 | |
| 1335 | cfg = container_of(c, struct config_usb_cfg, c); |
| 1336 | if (list_empty(&cfg->func_list)) { |
Peter Chen | 4d9f872 | 2014-05-05 07:39:34 +0800 | [diff] [blame] | 1337 | pr_err("Config %s/%d of %s needs at least one function.\n", |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1338 | c->label, c->bConfigurationValue, |
| 1339 | gi->composite.name); |
| 1340 | goto err_comp_cleanup; |
| 1341 | } |
| 1342 | } |
| 1343 | |
| 1344 | /* init all strings */ |
| 1345 | if (!list_empty(&gi->string_list)) { |
| 1346 | struct gadget_strings *gs; |
| 1347 | |
| 1348 | i = 0; |
| 1349 | list_for_each_entry(gs, &gi->string_list, list) { |
| 1350 | |
| 1351 | gi->gstrings[i] = &gs->stringtab_dev; |
| 1352 | gs->stringtab_dev.strings = gs->strings; |
| 1353 | gs->strings[USB_GADGET_MANUFACTURER_IDX].s = |
| 1354 | gs->manufacturer; |
| 1355 | gs->strings[USB_GADGET_PRODUCT_IDX].s = gs->product; |
| 1356 | gs->strings[USB_GADGET_SERIAL_IDX].s = gs->serialnumber; |
| 1357 | i++; |
| 1358 | } |
| 1359 | gi->gstrings[i] = NULL; |
| 1360 | s = usb_gstrings_attach(&gi->cdev, gi->gstrings, |
| 1361 | USB_GADGET_FIRST_AVAIL_IDX); |
Wei Yongjun | fea7707 | 2013-05-07 19:50:31 +0800 | [diff] [blame] | 1362 | if (IS_ERR(s)) { |
| 1363 | ret = PTR_ERR(s); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1364 | goto err_comp_cleanup; |
Wei Yongjun | fea7707 | 2013-05-07 19:50:31 +0800 | [diff] [blame] | 1365 | } |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1366 | |
| 1367 | gi->cdev.desc.iManufacturer = s[USB_GADGET_MANUFACTURER_IDX].id; |
| 1368 | gi->cdev.desc.iProduct = s[USB_GADGET_PRODUCT_IDX].id; |
| 1369 | gi->cdev.desc.iSerialNumber = s[USB_GADGET_SERIAL_IDX].id; |
| 1370 | } |
| 1371 | |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 1372 | if (gi->use_os_desc) { |
| 1373 | cdev->use_os_string = true; |
| 1374 | cdev->b_vendor_code = gi->b_vendor_code; |
| 1375 | memcpy(cdev->qw_sign, gi->qw_sign, OS_STRING_QW_SIGN_LEN); |
| 1376 | } |
| 1377 | |
Li Jun | 41ce84c | 2015-07-09 15:18:48 +0800 | [diff] [blame] | 1378 | if (gadget_is_otg(gadget) && !otg_desc[0]) { |
| 1379 | struct usb_descriptor_header *usb_desc; |
| 1380 | |
| 1381 | usb_desc = usb_otg_descriptor_alloc(gadget); |
| 1382 | if (!usb_desc) { |
| 1383 | ret = -ENOMEM; |
| 1384 | goto err_comp_cleanup; |
| 1385 | } |
| 1386 | usb_otg_descriptor_init(gadget, usb_desc); |
| 1387 | otg_desc[0] = usb_desc; |
| 1388 | otg_desc[1] = NULL; |
| 1389 | } |
| 1390 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1391 | /* Go through all configs, attach all functions */ |
| 1392 | list_for_each_entry(c, &gi->cdev.configs, list) { |
| 1393 | struct config_usb_cfg *cfg; |
| 1394 | struct usb_function *f; |
| 1395 | struct usb_function *tmp; |
| 1396 | struct gadget_config_name *cn; |
| 1397 | |
Li Jun | 41ce84c | 2015-07-09 15:18:48 +0800 | [diff] [blame] | 1398 | if (gadget_is_otg(gadget)) |
| 1399 | c->descriptors = otg_desc; |
| 1400 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1401 | cfg = container_of(c, struct config_usb_cfg, c); |
| 1402 | if (!list_empty(&cfg->string_list)) { |
| 1403 | i = 0; |
| 1404 | list_for_each_entry(cn, &cfg->string_list, list) { |
| 1405 | cfg->gstrings[i] = &cn->stringtab_dev; |
| 1406 | cn->stringtab_dev.strings = &cn->strings; |
| 1407 | cn->strings.s = cn->configuration; |
| 1408 | i++; |
| 1409 | } |
| 1410 | cfg->gstrings[i] = NULL; |
| 1411 | s = usb_gstrings_attach(&gi->cdev, cfg->gstrings, 1); |
Wei Yongjun | fea7707 | 2013-05-07 19:50:31 +0800 | [diff] [blame] | 1412 | if (IS_ERR(s)) { |
| 1413 | ret = PTR_ERR(s); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1414 | goto err_comp_cleanup; |
Wei Yongjun | fea7707 | 2013-05-07 19:50:31 +0800 | [diff] [blame] | 1415 | } |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1416 | c->iConfiguration = s[0].id; |
| 1417 | } |
| 1418 | |
| 1419 | list_for_each_entry_safe(f, tmp, &cfg->func_list, list) { |
| 1420 | list_del(&f->list); |
| 1421 | ret = usb_add_function(c, f); |
Andrzej Pietrasiewicz | 5a68e9b | 2013-08-08 09:43:28 +0200 | [diff] [blame] | 1422 | if (ret) { |
| 1423 | list_add(&f->list, &cfg->func_list); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1424 | goto err_purge_funcs; |
Andrzej Pietrasiewicz | 5a68e9b | 2013-08-08 09:43:28 +0200 | [diff] [blame] | 1425 | } |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1426 | } |
| 1427 | usb_ep_autoconfig_reset(cdev->gadget); |
| 1428 | } |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1429 | if (cdev->use_os_string) { |
| 1430 | ret = composite_os_desc_req_prepare(cdev, gadget->ep0); |
| 1431 | if (ret) |
| 1432 | goto err_purge_funcs; |
| 1433 | } |
| 1434 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1435 | usb_ep_autoconfig_reset(cdev->gadget); |
| 1436 | return 0; |
| 1437 | |
| 1438 | err_purge_funcs: |
| 1439 | purge_configs_funcs(gi); |
| 1440 | err_comp_cleanup: |
| 1441 | composite_dev_cleanup(cdev); |
| 1442 | return ret; |
| 1443 | } |
| 1444 | |
| 1445 | static void configfs_composite_unbind(struct usb_gadget *gadget) |
| 1446 | { |
| 1447 | struct usb_composite_dev *cdev; |
| 1448 | struct gadget_info *gi; |
| 1449 | |
| 1450 | /* the gi->lock is hold by the caller */ |
| 1451 | |
| 1452 | cdev = get_gadget_data(gadget); |
| 1453 | gi = container_of(cdev, struct gadget_info, cdev); |
| 1454 | |
Li Jun | 41ce84c | 2015-07-09 15:18:48 +0800 | [diff] [blame] | 1455 | kfree(otg_desc[0]); |
| 1456 | otg_desc[0] = NULL; |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1457 | purge_configs_funcs(gi); |
| 1458 | composite_dev_cleanup(cdev); |
| 1459 | usb_ep_autoconfig_reset(cdev->gadget); |
| 1460 | cdev->gadget = NULL; |
| 1461 | set_gadget_data(gadget, NULL); |
| 1462 | } |
| 1463 | |
| 1464 | static const struct usb_gadget_driver configfs_driver_template = { |
| 1465 | .bind = configfs_composite_bind, |
| 1466 | .unbind = configfs_composite_unbind, |
| 1467 | |
| 1468 | .setup = composite_setup, |
Peter Chen | 02f751b | 2014-09-09 08:56:50 +0800 | [diff] [blame] | 1469 | .reset = composite_disconnect, |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1470 | .disconnect = composite_disconnect, |
| 1471 | |
Andrzej Pietrasiewicz | 3a57187 | 2014-10-08 12:03:36 +0200 | [diff] [blame] | 1472 | .suspend = composite_suspend, |
| 1473 | .resume = composite_resume, |
| 1474 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1475 | .max_speed = USB_SPEED_SUPER, |
| 1476 | .driver = { |
| 1477 | .owner = THIS_MODULE, |
| 1478 | .name = "configfs-gadget", |
| 1479 | }, |
| 1480 | }; |
| 1481 | |
| 1482 | static struct config_group *gadgets_make( |
| 1483 | struct config_group *group, |
| 1484 | const char *name) |
| 1485 | { |
| 1486 | struct gadget_info *gi; |
| 1487 | |
| 1488 | gi = kzalloc(sizeof(*gi), GFP_KERNEL); |
| 1489 | if (!gi) |
| 1490 | return ERR_PTR(-ENOMEM); |
| 1491 | |
| 1492 | gi->group.default_groups = gi->default_groups; |
| 1493 | gi->group.default_groups[0] = &gi->functions_group; |
| 1494 | gi->group.default_groups[1] = &gi->configs_group; |
| 1495 | gi->group.default_groups[2] = &gi->strings_group; |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 1496 | gi->group.default_groups[3] = &gi->os_desc_group; |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1497 | |
| 1498 | config_group_init_type_name(&gi->functions_group, "functions", |
| 1499 | &functions_type); |
| 1500 | config_group_init_type_name(&gi->configs_group, "configs", |
| 1501 | &config_desc_type); |
| 1502 | config_group_init_type_name(&gi->strings_group, "strings", |
| 1503 | &gadget_strings_strings_type); |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 1504 | config_group_init_type_name(&gi->os_desc_group, "os_desc", |
| 1505 | &os_desc_type); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1506 | |
| 1507 | gi->composite.bind = configfs_do_nothing; |
| 1508 | gi->composite.unbind = configfs_do_nothing; |
| 1509 | gi->composite.suspend = NULL; |
| 1510 | gi->composite.resume = NULL; |
| 1511 | gi->composite.max_speed = USB_SPEED_SUPER; |
| 1512 | |
| 1513 | mutex_init(&gi->lock); |
| 1514 | INIT_LIST_HEAD(&gi->string_list); |
| 1515 | INIT_LIST_HEAD(&gi->available_func); |
| 1516 | |
| 1517 | composite_init_dev(&gi->cdev); |
| 1518 | gi->cdev.desc.bLength = USB_DT_DEVICE_SIZE; |
| 1519 | gi->cdev.desc.bDescriptorType = USB_DT_DEVICE; |
| 1520 | gi->cdev.desc.bcdDevice = cpu_to_le16(get_default_bcdDevice()); |
| 1521 | |
| 1522 | gi->composite.gadget_driver = configfs_driver_template; |
| 1523 | |
| 1524 | gi->composite.gadget_driver.function = kstrdup(name, GFP_KERNEL); |
| 1525 | gi->composite.name = gi->composite.gadget_driver.function; |
| 1526 | |
| 1527 | if (!gi->composite.gadget_driver.function) |
| 1528 | goto err; |
| 1529 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1530 | config_group_init_type_name(&gi->group, name, |
| 1531 | &gadget_root_type); |
| 1532 | return &gi->group; |
| 1533 | err: |
| 1534 | kfree(gi); |
| 1535 | return ERR_PTR(-ENOMEM); |
| 1536 | } |
| 1537 | |
| 1538 | static void gadgets_drop(struct config_group *group, struct config_item *item) |
| 1539 | { |
| 1540 | config_item_put(item); |
| 1541 | } |
| 1542 | |
| 1543 | static struct configfs_group_operations gadgets_ops = { |
| 1544 | .make_group = &gadgets_make, |
| 1545 | .drop_item = &gadgets_drop, |
| 1546 | }; |
| 1547 | |
| 1548 | static struct config_item_type gadgets_type = { |
| 1549 | .ct_group_ops = &gadgets_ops, |
| 1550 | .ct_owner = THIS_MODULE, |
| 1551 | }; |
| 1552 | |
| 1553 | static struct configfs_subsystem gadget_subsys = { |
| 1554 | .su_group = { |
| 1555 | .cg_item = { |
| 1556 | .ci_namebuf = "usb_gadget", |
| 1557 | .ci_type = &gadgets_type, |
| 1558 | }, |
| 1559 | }, |
| 1560 | .su_mutex = __MUTEX_INITIALIZER(gadget_subsys.su_mutex), |
| 1561 | }; |
| 1562 | |
Andrzej Pietrasiewicz | 092a4bd | 2013-09-26 14:38:15 +0200 | [diff] [blame] | 1563 | void unregister_gadget_item(struct config_item *item) |
| 1564 | { |
| 1565 | struct gadget_info *gi = to_gadget_info(item); |
| 1566 | |
| 1567 | unregister_gadget(gi); |
| 1568 | } |
Felipe Balbi | 0700faa | 2014-04-01 13:19:32 -0500 | [diff] [blame] | 1569 | EXPORT_SYMBOL_GPL(unregister_gadget_item); |
Andrzej Pietrasiewicz | 092a4bd | 2013-09-26 14:38:15 +0200 | [diff] [blame] | 1570 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1571 | static int __init gadget_cfs_init(void) |
| 1572 | { |
| 1573 | int ret; |
| 1574 | |
| 1575 | config_group_init(&gadget_subsys.su_group); |
| 1576 | |
| 1577 | ret = configfs_register_subsystem(&gadget_subsys); |
| 1578 | return ret; |
| 1579 | } |
| 1580 | module_init(gadget_cfs_init); |
| 1581 | |
| 1582 | static void __exit gadget_cfs_exit(void) |
| 1583 | { |
| 1584 | configfs_unregister_subsystem(&gadget_subsys); |
| 1585 | } |
| 1586 | module_exit(gadget_cfs_exit); |