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; |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 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 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 58 | struct usb_composite_driver composite; |
| 59 | struct usb_composite_dev cdev; |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 60 | bool use_os_desc; |
| 61 | char b_vendor_code; |
| 62 | char qw_sign[OS_STRING_QW_SIGN_LEN]; |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 63 | }; |
| 64 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 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 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 70 | struct config_usb_cfg { |
| 71 | struct config_group group; |
| 72 | struct config_group strings_group; |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 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 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 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 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 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 | |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 96 | struct os_desc { |
| 97 | struct config_group group; |
| 98 | }; |
| 99 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 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 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 128 | #define GI_DEVICE_DESC_SIMPLE_R_u8(__name) \ |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 129 | static ssize_t gadget_dev_desc_##__name##_show(struct config_item *item, \ |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 130 | char *page) \ |
| 131 | { \ |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 132 | return sprintf(page, "0x%02x\n", \ |
| 133 | to_gadget_info(item)->cdev.desc.__name); \ |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 134 | } |
| 135 | |
| 136 | #define GI_DEVICE_DESC_SIMPLE_R_u16(__name) \ |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 137 | static ssize_t gadget_dev_desc_##__name##_show(struct config_item *item, \ |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 138 | char *page) \ |
| 139 | { \ |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 140 | return sprintf(page, "0x%04x\n", \ |
| 141 | le16_to_cpup(&to_gadget_info(item)->cdev.desc.__name)); \ |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 142 | } |
| 143 | |
| 144 | |
| 145 | #define GI_DEVICE_DESC_SIMPLE_W_u8(_name) \ |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 146 | static ssize_t gadget_dev_desc_##_name##_store(struct config_item *item, \ |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 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; \ |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 154 | to_gadget_info(item)->cdev.desc._name = val; \ |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 155 | return len; \ |
| 156 | } |
| 157 | |
| 158 | #define GI_DEVICE_DESC_SIMPLE_W_u16(_name) \ |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 159 | static ssize_t gadget_dev_desc_##_name##_store(struct config_item *item, \ |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 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; \ |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 167 | to_gadget_info(item)->cdev.desc._name = cpu_to_le16p(&val); \ |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 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 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 197 | static ssize_t gadget_dev_desc_bcdDevice_store(struct config_item *item, |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 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 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 210 | to_gadget_info(item)->cdev.desc.bcdDevice = cpu_to_le16(bcdDevice); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 211 | return len; |
| 212 | } |
| 213 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 214 | static ssize_t gadget_dev_desc_bcdUSB_store(struct config_item *item, |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 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 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 227 | to_gadget_info(item)->cdev.desc.bcdUSB = cpu_to_le16(bcdUSB); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 228 | return len; |
| 229 | } |
| 230 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 231 | static ssize_t gadget_dev_desc_UDC_show(struct config_item *item, char *page) |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 232 | { |
Ruslan Bilovol | afdaadc | 2015-11-23 09:56:36 +0100 | [diff] [blame] | 233 | char *udc_name = to_gadget_info(item)->composite.gadget_driver.udc_name; |
| 234 | |
| 235 | return sprintf(page, "%s\n", udc_name ?: ""); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 236 | } |
| 237 | |
| 238 | static int unregister_gadget(struct gadget_info *gi) |
| 239 | { |
| 240 | int ret; |
| 241 | |
Ruslan Bilovol | afdaadc | 2015-11-23 09:56:36 +0100 | [diff] [blame] | 242 | if (!gi->composite.gadget_driver.udc_name) |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 243 | return -ENODEV; |
| 244 | |
| 245 | ret = usb_gadget_unregister_driver(&gi->composite.gadget_driver); |
| 246 | if (ret) |
| 247 | return ret; |
Ruslan Bilovol | afdaadc | 2015-11-23 09:56:36 +0100 | [diff] [blame] | 248 | kfree(gi->composite.gadget_driver.udc_name); |
| 249 | gi->composite.gadget_driver.udc_name = NULL; |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 250 | return 0; |
| 251 | } |
| 252 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 253 | static ssize_t gadget_dev_desc_UDC_store(struct config_item *item, |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 254 | const char *page, size_t len) |
| 255 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 256 | struct gadget_info *gi = to_gadget_info(item); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 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; |
John Keeping | 59682e7 | 2017-02-28 10:55:30 +0000 | [diff] [blame] | 272 | kfree(name); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 273 | } else { |
Ruslan Bilovol | afdaadc | 2015-11-23 09:56:36 +0100 | [diff] [blame] | 274 | if (gi->composite.gadget_driver.udc_name) { |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 275 | ret = -EBUSY; |
| 276 | goto err; |
| 277 | } |
Ruslan Bilovol | afdaadc | 2015-11-23 09:56:36 +0100 | [diff] [blame] | 278 | gi->composite.gadget_driver.udc_name = name; |
| 279 | ret = usb_gadget_probe_driver(&gi->composite.gadget_driver); |
| 280 | if (ret) { |
| 281 | gi->composite.gadget_driver.udc_name = NULL; |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 282 | goto err; |
Ruslan Bilovol | afdaadc | 2015-11-23 09:56:36 +0100 | [diff] [blame] | 283 | } |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 284 | } |
| 285 | mutex_unlock(&gi->lock); |
| 286 | return len; |
| 287 | err: |
| 288 | kfree(name); |
| 289 | mutex_unlock(&gi->lock); |
| 290 | return ret; |
| 291 | } |
| 292 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 293 | CONFIGFS_ATTR(gadget_dev_desc_, bDeviceClass); |
| 294 | CONFIGFS_ATTR(gadget_dev_desc_, bDeviceSubClass); |
| 295 | CONFIGFS_ATTR(gadget_dev_desc_, bDeviceProtocol); |
| 296 | CONFIGFS_ATTR(gadget_dev_desc_, bMaxPacketSize0); |
| 297 | CONFIGFS_ATTR(gadget_dev_desc_, idVendor); |
| 298 | CONFIGFS_ATTR(gadget_dev_desc_, idProduct); |
| 299 | CONFIGFS_ATTR(gadget_dev_desc_, bcdDevice); |
| 300 | CONFIGFS_ATTR(gadget_dev_desc_, bcdUSB); |
| 301 | CONFIGFS_ATTR(gadget_dev_desc_, UDC); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 302 | |
| 303 | static struct configfs_attribute *gadget_root_attrs[] = { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 304 | &gadget_dev_desc_attr_bDeviceClass, |
| 305 | &gadget_dev_desc_attr_bDeviceSubClass, |
| 306 | &gadget_dev_desc_attr_bDeviceProtocol, |
| 307 | &gadget_dev_desc_attr_bMaxPacketSize0, |
| 308 | &gadget_dev_desc_attr_idVendor, |
| 309 | &gadget_dev_desc_attr_idProduct, |
| 310 | &gadget_dev_desc_attr_bcdDevice, |
| 311 | &gadget_dev_desc_attr_bcdUSB, |
| 312 | &gadget_dev_desc_attr_UDC, |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 313 | NULL, |
| 314 | }; |
| 315 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 316 | static inline struct gadget_strings *to_gadget_strings(struct config_item *item) |
| 317 | { |
| 318 | return container_of(to_config_group(item), struct gadget_strings, |
| 319 | group); |
| 320 | } |
| 321 | |
| 322 | static inline struct gadget_config_name *to_gadget_config_name( |
| 323 | struct config_item *item) |
| 324 | { |
| 325 | return container_of(to_config_group(item), struct gadget_config_name, |
| 326 | group); |
| 327 | } |
| 328 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 329 | static inline struct usb_function_instance *to_usb_function_instance( |
| 330 | struct config_item *item) |
| 331 | { |
| 332 | return container_of(to_config_group(item), |
| 333 | struct usb_function_instance, group); |
| 334 | } |
| 335 | |
| 336 | static void gadget_info_attr_release(struct config_item *item) |
| 337 | { |
| 338 | struct gadget_info *gi = to_gadget_info(item); |
| 339 | |
| 340 | WARN_ON(!list_empty(&gi->cdev.configs)); |
| 341 | WARN_ON(!list_empty(&gi->string_list)); |
| 342 | WARN_ON(!list_empty(&gi->available_func)); |
| 343 | kfree(gi->composite.gadget_driver.function); |
| 344 | kfree(gi); |
| 345 | } |
| 346 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 347 | static struct configfs_item_operations gadget_root_item_ops = { |
| 348 | .release = gadget_info_attr_release, |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 349 | }; |
| 350 | |
| 351 | static void gadget_config_attr_release(struct config_item *item) |
| 352 | { |
| 353 | struct config_usb_cfg *cfg = to_config_usb_cfg(item); |
| 354 | |
| 355 | WARN_ON(!list_empty(&cfg->c.functions)); |
| 356 | list_del(&cfg->c.list); |
| 357 | kfree(cfg->c.label); |
| 358 | kfree(cfg); |
| 359 | } |
| 360 | |
| 361 | static int config_usb_cfg_link( |
| 362 | struct config_item *usb_cfg_ci, |
| 363 | struct config_item *usb_func_ci) |
| 364 | { |
| 365 | struct config_usb_cfg *cfg = to_config_usb_cfg(usb_cfg_ci); |
| 366 | struct usb_composite_dev *cdev = cfg->c.cdev; |
| 367 | struct gadget_info *gi = container_of(cdev, struct gadget_info, cdev); |
| 368 | |
| 369 | struct config_group *group = to_config_group(usb_func_ci); |
| 370 | struct usb_function_instance *fi = container_of(group, |
| 371 | struct usb_function_instance, group); |
| 372 | struct usb_function_instance *a_fi; |
| 373 | struct usb_function *f; |
| 374 | int ret; |
| 375 | |
| 376 | mutex_lock(&gi->lock); |
| 377 | /* |
| 378 | * Make sure this function is from within our _this_ gadget and not |
| 379 | * from another gadget or a random directory. |
| 380 | * Also a function instance can only be linked once. |
| 381 | */ |
| 382 | list_for_each_entry(a_fi, &gi->available_func, cfs_list) { |
| 383 | if (a_fi == fi) |
| 384 | break; |
| 385 | } |
| 386 | if (a_fi != fi) { |
| 387 | ret = -EINVAL; |
| 388 | goto out; |
| 389 | } |
| 390 | |
| 391 | list_for_each_entry(f, &cfg->func_list, list) { |
| 392 | if (f->fi == fi) { |
| 393 | ret = -EEXIST; |
| 394 | goto out; |
| 395 | } |
| 396 | } |
| 397 | |
| 398 | f = usb_get_function(fi); |
| 399 | if (IS_ERR(f)) { |
| 400 | ret = PTR_ERR(f); |
| 401 | goto out; |
| 402 | } |
| 403 | |
| 404 | /* stash the function until we bind it to the gadget */ |
| 405 | list_add_tail(&f->list, &cfg->func_list); |
| 406 | ret = 0; |
| 407 | out: |
| 408 | mutex_unlock(&gi->lock); |
| 409 | return ret; |
| 410 | } |
| 411 | |
| 412 | static int config_usb_cfg_unlink( |
| 413 | struct config_item *usb_cfg_ci, |
| 414 | struct config_item *usb_func_ci) |
| 415 | { |
| 416 | struct config_usb_cfg *cfg = to_config_usb_cfg(usb_cfg_ci); |
| 417 | struct usb_composite_dev *cdev = cfg->c.cdev; |
| 418 | struct gadget_info *gi = container_of(cdev, struct gadget_info, cdev); |
| 419 | |
| 420 | struct config_group *group = to_config_group(usb_func_ci); |
| 421 | struct usb_function_instance *fi = container_of(group, |
| 422 | struct usb_function_instance, group); |
| 423 | struct usb_function *f; |
| 424 | |
| 425 | /* |
| 426 | * ideally I would like to forbid to unlink functions while a gadget is |
| 427 | * bound to an UDC. Since this isn't possible at the moment, we simply |
| 428 | * force an unbind, the function is available here and then we can |
| 429 | * remove the function. |
| 430 | */ |
| 431 | mutex_lock(&gi->lock); |
Ruslan Bilovol | afdaadc | 2015-11-23 09:56:36 +0100 | [diff] [blame] | 432 | if (gi->composite.gadget_driver.udc_name) |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 433 | unregister_gadget(gi); |
Ruslan Bilovol | afdaadc | 2015-11-23 09:56:36 +0100 | [diff] [blame] | 434 | WARN_ON(gi->composite.gadget_driver.udc_name); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 435 | |
| 436 | list_for_each_entry(f, &cfg->func_list, list) { |
| 437 | if (f->fi == fi) { |
| 438 | list_del(&f->list); |
| 439 | usb_put_function(f); |
| 440 | mutex_unlock(&gi->lock); |
| 441 | return 0; |
| 442 | } |
| 443 | } |
| 444 | mutex_unlock(&gi->lock); |
David Rientjes | 75bfe23 | 2013-04-07 14:11:47 -0700 | [diff] [blame] | 445 | WARN(1, "Unable to locate function to unbind\n"); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 446 | return 0; |
| 447 | } |
| 448 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 449 | static struct configfs_item_operations gadget_config_item_ops = { |
| 450 | .release = gadget_config_attr_release, |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 451 | .allow_link = config_usb_cfg_link, |
| 452 | .drop_link = config_usb_cfg_unlink, |
| 453 | }; |
| 454 | |
| 455 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 456 | static ssize_t gadget_config_desc_MaxPower_show(struct config_item *item, |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 457 | char *page) |
| 458 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 459 | return sprintf(page, "%u\n", to_config_usb_cfg(item)->c.MaxPower); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 460 | } |
| 461 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 462 | static ssize_t gadget_config_desc_MaxPower_store(struct config_item *item, |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 463 | const char *page, size_t len) |
| 464 | { |
| 465 | u16 val; |
| 466 | int ret; |
| 467 | ret = kstrtou16(page, 0, &val); |
| 468 | if (ret) |
| 469 | return ret; |
| 470 | if (DIV_ROUND_UP(val, 8) > 0xff) |
| 471 | return -ERANGE; |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 472 | to_config_usb_cfg(item)->c.MaxPower = val; |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 473 | return len; |
| 474 | } |
| 475 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 476 | static ssize_t gadget_config_desc_bmAttributes_show(struct config_item *item, |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 477 | char *page) |
| 478 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 479 | return sprintf(page, "0x%02x\n", |
| 480 | to_config_usb_cfg(item)->c.bmAttributes); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 481 | } |
| 482 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 483 | static ssize_t gadget_config_desc_bmAttributes_store(struct config_item *item, |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 484 | const char *page, size_t len) |
| 485 | { |
| 486 | u8 val; |
| 487 | int ret; |
| 488 | ret = kstrtou8(page, 0, &val); |
| 489 | if (ret) |
| 490 | return ret; |
| 491 | if (!(val & USB_CONFIG_ATT_ONE)) |
| 492 | return -EINVAL; |
| 493 | if (val & ~(USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER | |
| 494 | USB_CONFIG_ATT_WAKEUP)) |
| 495 | return -EINVAL; |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 496 | to_config_usb_cfg(item)->c.bmAttributes = val; |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 497 | return len; |
| 498 | } |
| 499 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 500 | CONFIGFS_ATTR(gadget_config_desc_, MaxPower); |
| 501 | CONFIGFS_ATTR(gadget_config_desc_, bmAttributes); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 502 | |
| 503 | static struct configfs_attribute *gadget_config_attrs[] = { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 504 | &gadget_config_desc_attr_MaxPower, |
| 505 | &gadget_config_desc_attr_bmAttributes, |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 506 | NULL, |
| 507 | }; |
| 508 | |
| 509 | static struct config_item_type gadget_config_type = { |
| 510 | .ct_item_ops = &gadget_config_item_ops, |
| 511 | .ct_attrs = gadget_config_attrs, |
| 512 | .ct_owner = THIS_MODULE, |
| 513 | }; |
| 514 | |
| 515 | static struct config_item_type gadget_root_type = { |
| 516 | .ct_item_ops = &gadget_root_item_ops, |
| 517 | .ct_attrs = gadget_root_attrs, |
| 518 | .ct_owner = THIS_MODULE, |
| 519 | }; |
| 520 | |
| 521 | static void composite_init_dev(struct usb_composite_dev *cdev) |
| 522 | { |
| 523 | spin_lock_init(&cdev->lock); |
| 524 | INIT_LIST_HEAD(&cdev->configs); |
| 525 | INIT_LIST_HEAD(&cdev->gstrings); |
| 526 | } |
| 527 | |
| 528 | static struct config_group *function_make( |
| 529 | struct config_group *group, |
| 530 | const char *name) |
| 531 | { |
| 532 | struct gadget_info *gi; |
| 533 | struct usb_function_instance *fi; |
| 534 | char buf[MAX_NAME_LEN]; |
| 535 | char *func_name; |
| 536 | char *instance_name; |
| 537 | int ret; |
| 538 | |
| 539 | ret = snprintf(buf, MAX_NAME_LEN, "%s", name); |
| 540 | if (ret >= MAX_NAME_LEN) |
| 541 | return ERR_PTR(-ENAMETOOLONG); |
| 542 | |
| 543 | func_name = buf; |
| 544 | instance_name = strchr(func_name, '.'); |
| 545 | if (!instance_name) { |
| 546 | pr_err("Unable to locate . in FUNC.INSTANCE\n"); |
| 547 | return ERR_PTR(-EINVAL); |
| 548 | } |
| 549 | *instance_name = '\0'; |
| 550 | instance_name++; |
| 551 | |
| 552 | fi = usb_get_function_instance(func_name); |
| 553 | if (IS_ERR(fi)) |
Duan Jiong | a346941 | 2013-09-26 15:55:25 +0800 | [diff] [blame] | 554 | return ERR_CAST(fi); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 555 | |
Nicolas Iooss | 3958b79 | 2015-07-17 16:23:45 -0700 | [diff] [blame] | 556 | ret = config_item_set_name(&fi->group.cg_item, "%s", name); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 557 | if (ret) { |
| 558 | usb_put_function_instance(fi); |
| 559 | return ERR_PTR(ret); |
| 560 | } |
Andrzej Pietrasiewicz | 1933861 | 2013-12-03 15:15:21 +0100 | [diff] [blame] | 561 | if (fi->set_inst_name) { |
| 562 | ret = fi->set_inst_name(fi, instance_name); |
| 563 | if (ret) { |
| 564 | usb_put_function_instance(fi); |
| 565 | return ERR_PTR(ret); |
| 566 | } |
| 567 | } |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 568 | |
| 569 | gi = container_of(group, struct gadget_info, functions_group); |
| 570 | |
| 571 | mutex_lock(&gi->lock); |
| 572 | list_add_tail(&fi->cfs_list, &gi->available_func); |
| 573 | mutex_unlock(&gi->lock); |
| 574 | return &fi->group; |
| 575 | } |
| 576 | |
| 577 | static void function_drop( |
| 578 | struct config_group *group, |
| 579 | struct config_item *item) |
| 580 | { |
| 581 | struct usb_function_instance *fi = to_usb_function_instance(item); |
| 582 | struct gadget_info *gi; |
| 583 | |
| 584 | gi = container_of(group, struct gadget_info, functions_group); |
| 585 | |
| 586 | mutex_lock(&gi->lock); |
| 587 | list_del(&fi->cfs_list); |
| 588 | mutex_unlock(&gi->lock); |
| 589 | config_item_put(item); |
| 590 | } |
| 591 | |
| 592 | static struct configfs_group_operations functions_ops = { |
| 593 | .make_group = &function_make, |
| 594 | .drop_item = &function_drop, |
| 595 | }; |
| 596 | |
| 597 | static struct config_item_type functions_type = { |
| 598 | .ct_group_ops = &functions_ops, |
| 599 | .ct_owner = THIS_MODULE, |
| 600 | }; |
| 601 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 602 | GS_STRINGS_RW(gadget_config_name, configuration); |
| 603 | |
| 604 | static struct configfs_attribute *gadget_config_name_langid_attrs[] = { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 605 | &gadget_config_name_attr_configuration, |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 606 | NULL, |
| 607 | }; |
| 608 | |
| 609 | static void gadget_config_name_attr_release(struct config_item *item) |
| 610 | { |
| 611 | struct gadget_config_name *cn = to_gadget_config_name(item); |
| 612 | |
| 613 | kfree(cn->configuration); |
| 614 | |
| 615 | list_del(&cn->list); |
| 616 | kfree(cn); |
| 617 | } |
| 618 | |
| 619 | USB_CONFIG_STRING_RW_OPS(gadget_config_name); |
| 620 | USB_CONFIG_STRINGS_LANG(gadget_config_name, config_usb_cfg); |
| 621 | |
| 622 | static struct config_group *config_desc_make( |
| 623 | struct config_group *group, |
| 624 | const char *name) |
| 625 | { |
| 626 | struct gadget_info *gi; |
| 627 | struct config_usb_cfg *cfg; |
| 628 | char buf[MAX_NAME_LEN]; |
| 629 | char *num_str; |
| 630 | u8 num; |
| 631 | int ret; |
| 632 | |
| 633 | gi = container_of(group, struct gadget_info, configs_group); |
| 634 | ret = snprintf(buf, MAX_NAME_LEN, "%s", name); |
| 635 | if (ret >= MAX_NAME_LEN) |
| 636 | return ERR_PTR(-ENAMETOOLONG); |
| 637 | |
| 638 | num_str = strchr(buf, '.'); |
| 639 | if (!num_str) { |
| 640 | pr_err("Unable to locate . in name.bConfigurationValue\n"); |
| 641 | return ERR_PTR(-EINVAL); |
| 642 | } |
| 643 | |
| 644 | *num_str = '\0'; |
| 645 | num_str++; |
| 646 | |
| 647 | if (!strlen(buf)) |
| 648 | return ERR_PTR(-EINVAL); |
| 649 | |
| 650 | ret = kstrtou8(num_str, 0, &num); |
| 651 | if (ret) |
| 652 | return ERR_PTR(ret); |
| 653 | |
| 654 | cfg = kzalloc(sizeof(*cfg), GFP_KERNEL); |
| 655 | if (!cfg) |
| 656 | return ERR_PTR(-ENOMEM); |
| 657 | cfg->c.label = kstrdup(buf, GFP_KERNEL); |
| 658 | if (!cfg->c.label) { |
| 659 | ret = -ENOMEM; |
| 660 | goto err; |
| 661 | } |
| 662 | cfg->c.bConfigurationValue = num; |
| 663 | cfg->c.MaxPower = CONFIG_USB_GADGET_VBUS_DRAW; |
| 664 | cfg->c.bmAttributes = USB_CONFIG_ATT_ONE; |
| 665 | INIT_LIST_HEAD(&cfg->string_list); |
| 666 | INIT_LIST_HEAD(&cfg->func_list); |
| 667 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 668 | config_group_init_type_name(&cfg->group, name, |
| 669 | &gadget_config_type); |
Christoph Hellwig | 1ae1602 | 2016-02-26 11:02:14 +0100 | [diff] [blame] | 670 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 671 | config_group_init_type_name(&cfg->strings_group, "strings", |
| 672 | &gadget_config_name_strings_type); |
Christoph Hellwig | 1ae1602 | 2016-02-26 11:02:14 +0100 | [diff] [blame] | 673 | configfs_add_default_group(&cfg->strings_group, &cfg->group); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 674 | |
| 675 | ret = usb_add_config_only(&gi->cdev, &cfg->c); |
| 676 | if (ret) |
| 677 | goto err; |
| 678 | |
| 679 | return &cfg->group; |
| 680 | err: |
| 681 | kfree(cfg->c.label); |
| 682 | kfree(cfg); |
| 683 | return ERR_PTR(ret); |
| 684 | } |
| 685 | |
| 686 | static void config_desc_drop( |
| 687 | struct config_group *group, |
| 688 | struct config_item *item) |
| 689 | { |
| 690 | config_item_put(item); |
| 691 | } |
| 692 | |
| 693 | static struct configfs_group_operations config_desc_ops = { |
| 694 | .make_group = &config_desc_make, |
| 695 | .drop_item = &config_desc_drop, |
| 696 | }; |
| 697 | |
| 698 | static struct config_item_type config_desc_type = { |
| 699 | .ct_group_ops = &config_desc_ops, |
| 700 | .ct_owner = THIS_MODULE, |
| 701 | }; |
| 702 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 703 | GS_STRINGS_RW(gadget_strings, manufacturer); |
| 704 | GS_STRINGS_RW(gadget_strings, product); |
| 705 | GS_STRINGS_RW(gadget_strings, serialnumber); |
| 706 | |
| 707 | static struct configfs_attribute *gadget_strings_langid_attrs[] = { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 708 | &gadget_strings_attr_manufacturer, |
| 709 | &gadget_strings_attr_product, |
| 710 | &gadget_strings_attr_serialnumber, |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 711 | NULL, |
| 712 | }; |
| 713 | |
| 714 | static void gadget_strings_attr_release(struct config_item *item) |
| 715 | { |
| 716 | struct gadget_strings *gs = to_gadget_strings(item); |
| 717 | |
| 718 | kfree(gs->manufacturer); |
| 719 | kfree(gs->product); |
| 720 | kfree(gs->serialnumber); |
| 721 | |
| 722 | list_del(&gs->list); |
| 723 | kfree(gs); |
| 724 | } |
| 725 | |
| 726 | USB_CONFIG_STRING_RW_OPS(gadget_strings); |
| 727 | USB_CONFIG_STRINGS_LANG(gadget_strings, gadget_info); |
| 728 | |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 729 | static inline struct os_desc *to_os_desc(struct config_item *item) |
| 730 | { |
| 731 | return container_of(to_config_group(item), struct os_desc, group); |
| 732 | } |
| 733 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 734 | static inline struct gadget_info *os_desc_item_to_gadget_info( |
| 735 | struct config_item *item) |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 736 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 737 | return to_gadget_info(to_os_desc(item)->group.cg_item.ci_parent); |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 738 | } |
| 739 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 740 | static ssize_t os_desc_use_show(struct config_item *item, char *page) |
| 741 | { |
| 742 | return sprintf(page, "%d", |
| 743 | os_desc_item_to_gadget_info(item)->use_os_desc); |
| 744 | } |
| 745 | |
| 746 | static ssize_t os_desc_use_store(struct config_item *item, const char *page, |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 747 | size_t len) |
| 748 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 749 | struct gadget_info *gi = os_desc_item_to_gadget_info(item); |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 750 | int ret; |
| 751 | bool use; |
| 752 | |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 753 | mutex_lock(&gi->lock); |
| 754 | ret = strtobool(page, &use); |
| 755 | if (!ret) { |
| 756 | gi->use_os_desc = use; |
| 757 | ret = len; |
| 758 | } |
| 759 | mutex_unlock(&gi->lock); |
| 760 | |
| 761 | return ret; |
| 762 | } |
| 763 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 764 | static ssize_t os_desc_b_vendor_code_show(struct config_item *item, char *page) |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 765 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 766 | return sprintf(page, "%d", |
| 767 | os_desc_item_to_gadget_info(item)->b_vendor_code); |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 768 | } |
| 769 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 770 | static ssize_t os_desc_b_vendor_code_store(struct config_item *item, |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 771 | const char *page, size_t len) |
| 772 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 773 | struct gadget_info *gi = os_desc_item_to_gadget_info(item); |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 774 | int ret; |
| 775 | u8 b_vendor_code; |
| 776 | |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 777 | mutex_lock(&gi->lock); |
| 778 | ret = kstrtou8(page, 0, &b_vendor_code); |
| 779 | if (!ret) { |
| 780 | gi->b_vendor_code = b_vendor_code; |
| 781 | ret = len; |
| 782 | } |
| 783 | mutex_unlock(&gi->lock); |
| 784 | |
| 785 | return ret; |
| 786 | } |
| 787 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 788 | static ssize_t os_desc_qw_sign_show(struct config_item *item, char *page) |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 789 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 790 | struct gadget_info *gi = os_desc_item_to_gadget_info(item); |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 791 | |
| 792 | memcpy(page, gi->qw_sign, OS_STRING_QW_SIGN_LEN); |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 793 | return OS_STRING_QW_SIGN_LEN; |
| 794 | } |
| 795 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 796 | static ssize_t os_desc_qw_sign_store(struct config_item *item, const char *page, |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 797 | size_t len) |
| 798 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 799 | struct gadget_info *gi = os_desc_item_to_gadget_info(item); |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 800 | int res, l; |
| 801 | |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 802 | l = min((int)len, OS_STRING_QW_SIGN_LEN >> 1); |
| 803 | if (page[l - 1] == '\n') |
| 804 | --l; |
| 805 | |
| 806 | mutex_lock(&gi->lock); |
| 807 | res = utf8s_to_utf16s(page, l, |
| 808 | UTF16_LITTLE_ENDIAN, (wchar_t *) gi->qw_sign, |
| 809 | OS_STRING_QW_SIGN_LEN); |
| 810 | if (res > 0) |
| 811 | res = len; |
| 812 | mutex_unlock(&gi->lock); |
| 813 | |
| 814 | return res; |
| 815 | } |
| 816 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 817 | CONFIGFS_ATTR(os_desc_, use); |
| 818 | CONFIGFS_ATTR(os_desc_, b_vendor_code); |
| 819 | CONFIGFS_ATTR(os_desc_, qw_sign); |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 820 | |
| 821 | static struct configfs_attribute *os_desc_attrs[] = { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 822 | &os_desc_attr_use, |
| 823 | &os_desc_attr_b_vendor_code, |
| 824 | &os_desc_attr_qw_sign, |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 825 | NULL, |
| 826 | }; |
| 827 | |
| 828 | static void os_desc_attr_release(struct config_item *item) |
| 829 | { |
| 830 | struct os_desc *os_desc = to_os_desc(item); |
| 831 | kfree(os_desc); |
| 832 | } |
| 833 | |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 834 | static int os_desc_link(struct config_item *os_desc_ci, |
| 835 | struct config_item *usb_cfg_ci) |
| 836 | { |
| 837 | struct gadget_info *gi = container_of(to_config_group(os_desc_ci), |
| 838 | struct gadget_info, os_desc_group); |
| 839 | struct usb_composite_dev *cdev = &gi->cdev; |
| 840 | struct config_usb_cfg *c_target = |
| 841 | container_of(to_config_group(usb_cfg_ci), |
| 842 | struct config_usb_cfg, group); |
| 843 | struct usb_configuration *c; |
| 844 | int ret; |
| 845 | |
| 846 | mutex_lock(&gi->lock); |
| 847 | list_for_each_entry(c, &cdev->configs, list) { |
| 848 | if (c == &c_target->c) |
| 849 | break; |
| 850 | } |
| 851 | if (c != &c_target->c) { |
| 852 | ret = -EINVAL; |
| 853 | goto out; |
| 854 | } |
| 855 | |
| 856 | if (cdev->os_desc_config) { |
| 857 | ret = -EBUSY; |
| 858 | goto out; |
| 859 | } |
| 860 | |
| 861 | cdev->os_desc_config = &c_target->c; |
| 862 | ret = 0; |
| 863 | |
| 864 | out: |
| 865 | mutex_unlock(&gi->lock); |
| 866 | return ret; |
| 867 | } |
| 868 | |
| 869 | static int os_desc_unlink(struct config_item *os_desc_ci, |
| 870 | struct config_item *usb_cfg_ci) |
| 871 | { |
| 872 | struct gadget_info *gi = container_of(to_config_group(os_desc_ci), |
| 873 | struct gadget_info, os_desc_group); |
| 874 | struct usb_composite_dev *cdev = &gi->cdev; |
| 875 | |
| 876 | mutex_lock(&gi->lock); |
Ruslan Bilovol | afdaadc | 2015-11-23 09:56:36 +0100 | [diff] [blame] | 877 | if (gi->composite.gadget_driver.udc_name) |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 878 | unregister_gadget(gi); |
| 879 | cdev->os_desc_config = NULL; |
Ruslan Bilovol | afdaadc | 2015-11-23 09:56:36 +0100 | [diff] [blame] | 880 | WARN_ON(gi->composite.gadget_driver.udc_name); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 881 | mutex_unlock(&gi->lock); |
| 882 | return 0; |
| 883 | } |
| 884 | |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 885 | static struct configfs_item_operations os_desc_ops = { |
| 886 | .release = os_desc_attr_release, |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 887 | .allow_link = os_desc_link, |
| 888 | .drop_link = os_desc_unlink, |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 889 | }; |
| 890 | |
| 891 | static struct config_item_type os_desc_type = { |
| 892 | .ct_item_ops = &os_desc_ops, |
| 893 | .ct_attrs = os_desc_attrs, |
| 894 | .ct_owner = THIS_MODULE, |
| 895 | }; |
| 896 | |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 897 | static inline struct usb_os_desc_ext_prop |
| 898 | *to_usb_os_desc_ext_prop(struct config_item *item) |
| 899 | { |
| 900 | return container_of(item, struct usb_os_desc_ext_prop, item); |
| 901 | } |
| 902 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 903 | static ssize_t ext_prop_type_show(struct config_item *item, char *page) |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 904 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 905 | return sprintf(page, "%d", to_usb_os_desc_ext_prop(item)->type); |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 906 | } |
| 907 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 908 | static ssize_t ext_prop_type_store(struct config_item *item, |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 909 | const char *page, size_t len) |
| 910 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 911 | struct usb_os_desc_ext_prop *ext_prop = to_usb_os_desc_ext_prop(item); |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 912 | struct usb_os_desc *desc = to_usb_os_desc(ext_prop->item.ci_parent); |
| 913 | u8 type; |
| 914 | int ret; |
| 915 | |
| 916 | if (desc->opts_mutex) |
| 917 | mutex_lock(desc->opts_mutex); |
| 918 | ret = kstrtou8(page, 0, &type); |
| 919 | if (ret) |
| 920 | goto end; |
| 921 | if (type < USB_EXT_PROP_UNICODE || type > USB_EXT_PROP_UNICODE_MULTI) { |
| 922 | ret = -EINVAL; |
| 923 | goto end; |
| 924 | } |
| 925 | |
| 926 | if ((ext_prop->type == USB_EXT_PROP_BINARY || |
| 927 | ext_prop->type == USB_EXT_PROP_LE32 || |
| 928 | ext_prop->type == USB_EXT_PROP_BE32) && |
| 929 | (type == USB_EXT_PROP_UNICODE || |
| 930 | type == USB_EXT_PROP_UNICODE_ENV || |
| 931 | type == USB_EXT_PROP_UNICODE_LINK)) |
| 932 | ext_prop->data_len <<= 1; |
| 933 | else if ((ext_prop->type == USB_EXT_PROP_UNICODE || |
| 934 | ext_prop->type == USB_EXT_PROP_UNICODE_ENV || |
| 935 | ext_prop->type == USB_EXT_PROP_UNICODE_LINK) && |
| 936 | (type == USB_EXT_PROP_BINARY || |
| 937 | type == USB_EXT_PROP_LE32 || |
| 938 | type == USB_EXT_PROP_BE32)) |
| 939 | ext_prop->data_len >>= 1; |
| 940 | ext_prop->type = type; |
| 941 | ret = len; |
| 942 | |
| 943 | end: |
| 944 | if (desc->opts_mutex) |
| 945 | mutex_unlock(desc->opts_mutex); |
| 946 | return ret; |
| 947 | } |
| 948 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 949 | static ssize_t ext_prop_data_show(struct config_item *item, char *page) |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 950 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 951 | struct usb_os_desc_ext_prop *ext_prop = to_usb_os_desc_ext_prop(item); |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 952 | int len = ext_prop->data_len; |
| 953 | |
| 954 | if (ext_prop->type == USB_EXT_PROP_UNICODE || |
| 955 | ext_prop->type == USB_EXT_PROP_UNICODE_ENV || |
| 956 | ext_prop->type == USB_EXT_PROP_UNICODE_LINK) |
| 957 | len >>= 1; |
| 958 | memcpy(page, ext_prop->data, len); |
| 959 | |
| 960 | return len; |
| 961 | } |
| 962 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 963 | static ssize_t ext_prop_data_store(struct config_item *item, |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 964 | const char *page, size_t len) |
| 965 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 966 | struct usb_os_desc_ext_prop *ext_prop = to_usb_os_desc_ext_prop(item); |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 967 | struct usb_os_desc *desc = to_usb_os_desc(ext_prop->item.ci_parent); |
| 968 | char *new_data; |
| 969 | size_t ret_len = len; |
| 970 | |
| 971 | if (page[len - 1] == '\n' || page[len - 1] == '\0') |
| 972 | --len; |
Benoit Taine | 58b949e | 2014-05-26 17:21:20 +0200 | [diff] [blame] | 973 | new_data = kmemdup(page, len, GFP_KERNEL); |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 974 | if (!new_data) |
| 975 | return -ENOMEM; |
| 976 | |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 977 | if (desc->opts_mutex) |
| 978 | mutex_lock(desc->opts_mutex); |
| 979 | kfree(ext_prop->data); |
| 980 | ext_prop->data = new_data; |
| 981 | desc->ext_prop_len -= ext_prop->data_len; |
| 982 | ext_prop->data_len = len; |
| 983 | desc->ext_prop_len += ext_prop->data_len; |
| 984 | 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 | desc->ext_prop_len -= ext_prop->data_len; |
| 988 | ext_prop->data_len <<= 1; |
| 989 | ext_prop->data_len += 2; |
| 990 | desc->ext_prop_len += ext_prop->data_len; |
| 991 | } |
| 992 | if (desc->opts_mutex) |
| 993 | mutex_unlock(desc->opts_mutex); |
| 994 | return ret_len; |
| 995 | } |
| 996 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 997 | CONFIGFS_ATTR(ext_prop_, type); |
| 998 | CONFIGFS_ATTR(ext_prop_, data); |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 999 | |
| 1000 | static struct configfs_attribute *ext_prop_attrs[] = { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 1001 | &ext_prop_attr_type, |
| 1002 | &ext_prop_attr_data, |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 1003 | NULL, |
| 1004 | }; |
| 1005 | |
| 1006 | static void usb_os_desc_ext_prop_release(struct config_item *item) |
| 1007 | { |
| 1008 | struct usb_os_desc_ext_prop *ext_prop = to_usb_os_desc_ext_prop(item); |
| 1009 | |
| 1010 | kfree(ext_prop); /* frees a whole chunk */ |
| 1011 | } |
| 1012 | |
| 1013 | static struct configfs_item_operations ext_prop_ops = { |
| 1014 | .release = usb_os_desc_ext_prop_release, |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 1015 | }; |
| 1016 | |
| 1017 | static struct config_item *ext_prop_make( |
| 1018 | struct config_group *group, |
| 1019 | const char *name) |
| 1020 | { |
| 1021 | struct usb_os_desc_ext_prop *ext_prop; |
| 1022 | struct config_item_type *ext_prop_type; |
| 1023 | struct usb_os_desc *desc; |
| 1024 | char *vlabuf; |
| 1025 | |
| 1026 | vla_group(data_chunk); |
| 1027 | vla_item(data_chunk, struct usb_os_desc_ext_prop, ext_prop, 1); |
| 1028 | vla_item(data_chunk, struct config_item_type, ext_prop_type, 1); |
| 1029 | |
| 1030 | vlabuf = kzalloc(vla_group_size(data_chunk), GFP_KERNEL); |
| 1031 | if (!vlabuf) |
| 1032 | return ERR_PTR(-ENOMEM); |
| 1033 | |
| 1034 | ext_prop = vla_ptr(vlabuf, data_chunk, ext_prop); |
| 1035 | ext_prop_type = vla_ptr(vlabuf, data_chunk, ext_prop_type); |
| 1036 | |
| 1037 | desc = container_of(group, struct usb_os_desc, group); |
| 1038 | ext_prop_type->ct_item_ops = &ext_prop_ops; |
| 1039 | ext_prop_type->ct_attrs = ext_prop_attrs; |
| 1040 | ext_prop_type->ct_owner = desc->owner; |
| 1041 | |
| 1042 | config_item_init_type_name(&ext_prop->item, name, ext_prop_type); |
| 1043 | |
| 1044 | ext_prop->name = kstrdup(name, GFP_KERNEL); |
| 1045 | if (!ext_prop->name) { |
| 1046 | kfree(vlabuf); |
| 1047 | return ERR_PTR(-ENOMEM); |
| 1048 | } |
| 1049 | desc->ext_prop_len += 14; |
| 1050 | ext_prop->name_len = 2 * strlen(ext_prop->name) + 2; |
| 1051 | if (desc->opts_mutex) |
| 1052 | mutex_lock(desc->opts_mutex); |
| 1053 | desc->ext_prop_len += ext_prop->name_len; |
| 1054 | list_add_tail(&ext_prop->entry, &desc->ext_prop); |
| 1055 | ++desc->ext_prop_count; |
| 1056 | if (desc->opts_mutex) |
| 1057 | mutex_unlock(desc->opts_mutex); |
| 1058 | |
| 1059 | return &ext_prop->item; |
| 1060 | } |
| 1061 | |
| 1062 | static void ext_prop_drop(struct config_group *group, struct config_item *item) |
| 1063 | { |
| 1064 | struct usb_os_desc_ext_prop *ext_prop = to_usb_os_desc_ext_prop(item); |
| 1065 | struct usb_os_desc *desc = to_usb_os_desc(&group->cg_item); |
| 1066 | |
| 1067 | if (desc->opts_mutex) |
| 1068 | mutex_lock(desc->opts_mutex); |
| 1069 | list_del(&ext_prop->entry); |
| 1070 | --desc->ext_prop_count; |
| 1071 | kfree(ext_prop->name); |
| 1072 | desc->ext_prop_len -= (ext_prop->name_len + ext_prop->data_len + 14); |
| 1073 | if (desc->opts_mutex) |
| 1074 | mutex_unlock(desc->opts_mutex); |
| 1075 | config_item_put(item); |
| 1076 | } |
| 1077 | |
| 1078 | static struct configfs_group_operations interf_grp_ops = { |
| 1079 | .make_item = &ext_prop_make, |
| 1080 | .drop_item = &ext_prop_drop, |
| 1081 | }; |
| 1082 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 1083 | static ssize_t interf_grp_compatible_id_show(struct config_item *item, |
Andrzej Pietrasiewicz | fe00b13 | 2014-06-18 14:24:48 +0200 | [diff] [blame] | 1084 | char *page) |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1085 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 1086 | memcpy(page, to_usb_os_desc(item)->ext_compat_id, 8); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1087 | return 8; |
| 1088 | } |
| 1089 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 1090 | static ssize_t interf_grp_compatible_id_store(struct config_item *item, |
Andrzej Pietrasiewicz | fe00b13 | 2014-06-18 14:24:48 +0200 | [diff] [blame] | 1091 | const char *page, size_t len) |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1092 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 1093 | struct usb_os_desc *desc = to_usb_os_desc(item); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1094 | int l; |
| 1095 | |
| 1096 | l = min_t(int, 8, len); |
| 1097 | if (page[l - 1] == '\n') |
| 1098 | --l; |
| 1099 | if (desc->opts_mutex) |
| 1100 | mutex_lock(desc->opts_mutex); |
| 1101 | memcpy(desc->ext_compat_id, page, l); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1102 | |
| 1103 | if (desc->opts_mutex) |
| 1104 | mutex_unlock(desc->opts_mutex); |
| 1105 | |
| 1106 | return len; |
| 1107 | } |
| 1108 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 1109 | static ssize_t interf_grp_sub_compatible_id_show(struct config_item *item, |
Andrzej Pietrasiewicz | fe00b13 | 2014-06-18 14:24:48 +0200 | [diff] [blame] | 1110 | char *page) |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1111 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 1112 | memcpy(page, to_usb_os_desc(item)->ext_compat_id + 8, 8); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1113 | return 8; |
| 1114 | } |
| 1115 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 1116 | static ssize_t interf_grp_sub_compatible_id_store(struct config_item *item, |
Andrzej Pietrasiewicz | fe00b13 | 2014-06-18 14:24:48 +0200 | [diff] [blame] | 1117 | const char *page, size_t len) |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1118 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 1119 | struct usb_os_desc *desc = to_usb_os_desc(item); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1120 | int l; |
| 1121 | |
| 1122 | l = min_t(int, 8, len); |
| 1123 | if (page[l - 1] == '\n') |
| 1124 | --l; |
| 1125 | if (desc->opts_mutex) |
| 1126 | mutex_lock(desc->opts_mutex); |
| 1127 | memcpy(desc->ext_compat_id + 8, page, l); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1128 | |
| 1129 | if (desc->opts_mutex) |
| 1130 | mutex_unlock(desc->opts_mutex); |
| 1131 | |
| 1132 | return len; |
| 1133 | } |
| 1134 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 1135 | CONFIGFS_ATTR(interf_grp_, compatible_id); |
| 1136 | CONFIGFS_ATTR(interf_grp_, sub_compatible_id); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1137 | |
| 1138 | static struct configfs_attribute *interf_grp_attrs[] = { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 1139 | &interf_grp_attr_compatible_id, |
| 1140 | &interf_grp_attr_sub_compatible_id, |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1141 | NULL |
| 1142 | }; |
| 1143 | |
Andrew Gabbasov | 3c57f9d | 2017-09-30 08:54:52 -0700 | [diff] [blame] | 1144 | struct config_group *usb_os_desc_prepare_interf_dir( |
| 1145 | struct config_group *parent, |
| 1146 | int n_interf, |
| 1147 | struct usb_os_desc **desc, |
| 1148 | char **names, |
| 1149 | struct module *owner) |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1150 | { |
Christoph Hellwig | 1ae1602 | 2016-02-26 11:02:14 +0100 | [diff] [blame] | 1151 | struct config_group *os_desc_group; |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1152 | struct config_item_type *os_desc_type, *interface_type; |
| 1153 | |
| 1154 | vla_group(data_chunk); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1155 | vla_item(data_chunk, struct config_group, os_desc_group, 1); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1156 | vla_item(data_chunk, struct config_item_type, os_desc_type, 1); |
| 1157 | vla_item(data_chunk, struct config_item_type, interface_type, 1); |
| 1158 | |
| 1159 | char *vlabuf = kzalloc(vla_group_size(data_chunk), GFP_KERNEL); |
| 1160 | if (!vlabuf) |
Andrew Gabbasov | 3c57f9d | 2017-09-30 08:54:52 -0700 | [diff] [blame] | 1161 | return ERR_PTR(-ENOMEM); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1162 | |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1163 | os_desc_group = vla_ptr(vlabuf, data_chunk, os_desc_group); |
| 1164 | os_desc_type = vla_ptr(vlabuf, data_chunk, os_desc_type); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1165 | interface_type = vla_ptr(vlabuf, data_chunk, interface_type); |
| 1166 | |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1167 | os_desc_type->ct_owner = owner; |
| 1168 | config_group_init_type_name(os_desc_group, "os_desc", os_desc_type); |
Christoph Hellwig | 1ae1602 | 2016-02-26 11:02:14 +0100 | [diff] [blame] | 1169 | configfs_add_default_group(os_desc_group, parent); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1170 | |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 1171 | interface_type->ct_group_ops = &interf_grp_ops; |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1172 | interface_type->ct_attrs = interf_grp_attrs; |
| 1173 | interface_type->ct_owner = owner; |
| 1174 | |
| 1175 | while (n_interf--) { |
| 1176 | struct usb_os_desc *d; |
| 1177 | |
| 1178 | d = desc[n_interf]; |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 1179 | d->owner = owner; |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1180 | config_group_init_type_name(&d->group, "", interface_type); |
Andrzej Pietrasiewicz | 14574b5 | 2014-06-18 14:24:49 +0200 | [diff] [blame] | 1181 | config_item_set_name(&d->group.cg_item, "interface.%s", |
| 1182 | names[n_interf]); |
Christoph Hellwig | 1ae1602 | 2016-02-26 11:02:14 +0100 | [diff] [blame] | 1183 | configfs_add_default_group(&d->group, os_desc_group); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1184 | } |
| 1185 | |
Andrew Gabbasov | 3c57f9d | 2017-09-30 08:54:52 -0700 | [diff] [blame] | 1186 | return os_desc_group; |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1187 | } |
| 1188 | EXPORT_SYMBOL(usb_os_desc_prepare_interf_dir); |
| 1189 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1190 | static int configfs_do_nothing(struct usb_composite_dev *cdev) |
| 1191 | { |
David Rientjes | 75bfe23 | 2013-04-07 14:11:47 -0700 | [diff] [blame] | 1192 | WARN_ON(1); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1193 | return -EINVAL; |
| 1194 | } |
| 1195 | |
| 1196 | int composite_dev_prepare(struct usb_composite_driver *composite, |
| 1197 | struct usb_composite_dev *dev); |
| 1198 | |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1199 | int composite_os_desc_req_prepare(struct usb_composite_dev *cdev, |
| 1200 | struct usb_ep *ep0); |
| 1201 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1202 | static void purge_configs_funcs(struct gadget_info *gi) |
| 1203 | { |
| 1204 | struct usb_configuration *c; |
| 1205 | |
| 1206 | list_for_each_entry(c, &gi->cdev.configs, list) { |
| 1207 | struct usb_function *f, *tmp; |
| 1208 | struct config_usb_cfg *cfg; |
| 1209 | |
| 1210 | cfg = container_of(c, struct config_usb_cfg, c); |
| 1211 | |
| 1212 | list_for_each_entry_safe(f, tmp, &c->functions, list) { |
| 1213 | |
| 1214 | list_move_tail(&f->list, &cfg->func_list); |
| 1215 | if (f->unbind) { |
Romain Izard | da7b895 | 2016-08-29 12:22:29 +0300 | [diff] [blame] | 1216 | dev_dbg(&gi->cdev.gadget->dev, |
Romain Izard | a08f5db | 2016-07-26 18:21:46 +0200 | [diff] [blame] | 1217 | "unbind function '%s'/%p\n", |
| 1218 | f->name, f); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1219 | f->unbind(c, f); |
| 1220 | } |
| 1221 | } |
| 1222 | c->next_interface_id = 0; |
Krzysztof Opasiak | 903124f | 2015-03-20 15:48:56 +0100 | [diff] [blame] | 1223 | memset(c->interface, 0, sizeof(c->interface)); |
John Youn | 554eead | 2016-02-05 17:06:35 -0800 | [diff] [blame] | 1224 | c->superspeed_plus = 0; |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1225 | c->superspeed = 0; |
| 1226 | c->highspeed = 0; |
| 1227 | c->fullspeed = 0; |
| 1228 | } |
| 1229 | } |
| 1230 | |
| 1231 | static int configfs_composite_bind(struct usb_gadget *gadget, |
| 1232 | struct usb_gadget_driver *gdriver) |
| 1233 | { |
| 1234 | struct usb_composite_driver *composite = to_cdriver(gdriver); |
| 1235 | struct gadget_info *gi = container_of(composite, |
| 1236 | struct gadget_info, composite); |
| 1237 | struct usb_composite_dev *cdev = &gi->cdev; |
| 1238 | struct usb_configuration *c; |
| 1239 | struct usb_string *s; |
| 1240 | unsigned i; |
| 1241 | int ret; |
| 1242 | |
| 1243 | /* the gi->lock is hold by the caller */ |
| 1244 | cdev->gadget = gadget; |
| 1245 | set_gadget_data(gadget, cdev); |
| 1246 | ret = composite_dev_prepare(composite, cdev); |
| 1247 | if (ret) |
| 1248 | return ret; |
| 1249 | /* and now the gadget bind */ |
| 1250 | ret = -EINVAL; |
| 1251 | |
| 1252 | if (list_empty(&gi->cdev.configs)) { |
Peter Chen | 4d9f872 | 2014-05-05 07:39:34 +0800 | [diff] [blame] | 1253 | pr_err("Need at least one configuration in %s.\n", |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1254 | gi->composite.name); |
| 1255 | goto err_comp_cleanup; |
| 1256 | } |
| 1257 | |
| 1258 | |
| 1259 | list_for_each_entry(c, &gi->cdev.configs, list) { |
| 1260 | struct config_usb_cfg *cfg; |
| 1261 | |
| 1262 | cfg = container_of(c, struct config_usb_cfg, c); |
| 1263 | if (list_empty(&cfg->func_list)) { |
Peter Chen | 4d9f872 | 2014-05-05 07:39:34 +0800 | [diff] [blame] | 1264 | 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] | 1265 | c->label, c->bConfigurationValue, |
| 1266 | gi->composite.name); |
| 1267 | goto err_comp_cleanup; |
| 1268 | } |
| 1269 | } |
| 1270 | |
| 1271 | /* init all strings */ |
| 1272 | if (!list_empty(&gi->string_list)) { |
| 1273 | struct gadget_strings *gs; |
| 1274 | |
| 1275 | i = 0; |
| 1276 | list_for_each_entry(gs, &gi->string_list, list) { |
| 1277 | |
| 1278 | gi->gstrings[i] = &gs->stringtab_dev; |
| 1279 | gs->stringtab_dev.strings = gs->strings; |
| 1280 | gs->strings[USB_GADGET_MANUFACTURER_IDX].s = |
| 1281 | gs->manufacturer; |
| 1282 | gs->strings[USB_GADGET_PRODUCT_IDX].s = gs->product; |
| 1283 | gs->strings[USB_GADGET_SERIAL_IDX].s = gs->serialnumber; |
| 1284 | i++; |
| 1285 | } |
| 1286 | gi->gstrings[i] = NULL; |
| 1287 | s = usb_gstrings_attach(&gi->cdev, gi->gstrings, |
| 1288 | USB_GADGET_FIRST_AVAIL_IDX); |
Wei Yongjun | fea7707 | 2013-05-07 19:50:31 +0800 | [diff] [blame] | 1289 | if (IS_ERR(s)) { |
| 1290 | ret = PTR_ERR(s); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1291 | goto err_comp_cleanup; |
Wei Yongjun | fea7707 | 2013-05-07 19:50:31 +0800 | [diff] [blame] | 1292 | } |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1293 | |
| 1294 | gi->cdev.desc.iManufacturer = s[USB_GADGET_MANUFACTURER_IDX].id; |
| 1295 | gi->cdev.desc.iProduct = s[USB_GADGET_PRODUCT_IDX].id; |
| 1296 | gi->cdev.desc.iSerialNumber = s[USB_GADGET_SERIAL_IDX].id; |
| 1297 | } |
| 1298 | |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 1299 | if (gi->use_os_desc) { |
| 1300 | cdev->use_os_string = true; |
| 1301 | cdev->b_vendor_code = gi->b_vendor_code; |
| 1302 | memcpy(cdev->qw_sign, gi->qw_sign, OS_STRING_QW_SIGN_LEN); |
| 1303 | } |
| 1304 | |
Li Jun | 41ce84c | 2015-07-09 15:18:48 +0800 | [diff] [blame] | 1305 | if (gadget_is_otg(gadget) && !otg_desc[0]) { |
| 1306 | struct usb_descriptor_header *usb_desc; |
| 1307 | |
| 1308 | usb_desc = usb_otg_descriptor_alloc(gadget); |
| 1309 | if (!usb_desc) { |
| 1310 | ret = -ENOMEM; |
| 1311 | goto err_comp_cleanup; |
| 1312 | } |
| 1313 | usb_otg_descriptor_init(gadget, usb_desc); |
| 1314 | otg_desc[0] = usb_desc; |
| 1315 | otg_desc[1] = NULL; |
| 1316 | } |
| 1317 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1318 | /* Go through all configs, attach all functions */ |
| 1319 | list_for_each_entry(c, &gi->cdev.configs, list) { |
| 1320 | struct config_usb_cfg *cfg; |
| 1321 | struct usb_function *f; |
| 1322 | struct usb_function *tmp; |
| 1323 | struct gadget_config_name *cn; |
| 1324 | |
Li Jun | 41ce84c | 2015-07-09 15:18:48 +0800 | [diff] [blame] | 1325 | if (gadget_is_otg(gadget)) |
| 1326 | c->descriptors = otg_desc; |
| 1327 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1328 | cfg = container_of(c, struct config_usb_cfg, c); |
| 1329 | if (!list_empty(&cfg->string_list)) { |
| 1330 | i = 0; |
| 1331 | list_for_each_entry(cn, &cfg->string_list, list) { |
| 1332 | cfg->gstrings[i] = &cn->stringtab_dev; |
| 1333 | cn->stringtab_dev.strings = &cn->strings; |
| 1334 | cn->strings.s = cn->configuration; |
| 1335 | i++; |
| 1336 | } |
| 1337 | cfg->gstrings[i] = NULL; |
| 1338 | s = usb_gstrings_attach(&gi->cdev, cfg->gstrings, 1); |
Wei Yongjun | fea7707 | 2013-05-07 19:50:31 +0800 | [diff] [blame] | 1339 | if (IS_ERR(s)) { |
| 1340 | ret = PTR_ERR(s); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1341 | goto err_comp_cleanup; |
Wei Yongjun | fea7707 | 2013-05-07 19:50:31 +0800 | [diff] [blame] | 1342 | } |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1343 | c->iConfiguration = s[0].id; |
| 1344 | } |
| 1345 | |
| 1346 | list_for_each_entry_safe(f, tmp, &cfg->func_list, list) { |
| 1347 | list_del(&f->list); |
| 1348 | ret = usb_add_function(c, f); |
Andrzej Pietrasiewicz | 5a68e9b | 2013-08-08 09:43:28 +0200 | [diff] [blame] | 1349 | if (ret) { |
| 1350 | list_add(&f->list, &cfg->func_list); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1351 | goto err_purge_funcs; |
Andrzej Pietrasiewicz | 5a68e9b | 2013-08-08 09:43:28 +0200 | [diff] [blame] | 1352 | } |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1353 | } |
| 1354 | usb_ep_autoconfig_reset(cdev->gadget); |
| 1355 | } |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1356 | if (cdev->use_os_string) { |
| 1357 | ret = composite_os_desc_req_prepare(cdev, gadget->ep0); |
| 1358 | if (ret) |
| 1359 | goto err_purge_funcs; |
| 1360 | } |
| 1361 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1362 | usb_ep_autoconfig_reset(cdev->gadget); |
| 1363 | return 0; |
| 1364 | |
| 1365 | err_purge_funcs: |
| 1366 | purge_configs_funcs(gi); |
| 1367 | err_comp_cleanup: |
| 1368 | composite_dev_cleanup(cdev); |
| 1369 | return ret; |
| 1370 | } |
| 1371 | |
| 1372 | static void configfs_composite_unbind(struct usb_gadget *gadget) |
| 1373 | { |
| 1374 | struct usb_composite_dev *cdev; |
| 1375 | struct gadget_info *gi; |
| 1376 | |
| 1377 | /* the gi->lock is hold by the caller */ |
| 1378 | |
| 1379 | cdev = get_gadget_data(gadget); |
| 1380 | gi = container_of(cdev, struct gadget_info, cdev); |
| 1381 | |
Li Jun | 41ce84c | 2015-07-09 15:18:48 +0800 | [diff] [blame] | 1382 | kfree(otg_desc[0]); |
| 1383 | otg_desc[0] = NULL; |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1384 | purge_configs_funcs(gi); |
| 1385 | composite_dev_cleanup(cdev); |
| 1386 | usb_ep_autoconfig_reset(cdev->gadget); |
| 1387 | cdev->gadget = NULL; |
| 1388 | set_gadget_data(gadget, NULL); |
| 1389 | } |
| 1390 | |
| 1391 | static const struct usb_gadget_driver configfs_driver_template = { |
| 1392 | .bind = configfs_composite_bind, |
| 1393 | .unbind = configfs_composite_unbind, |
| 1394 | |
| 1395 | .setup = composite_setup, |
Peter Chen | 02f751b | 2014-09-09 08:56:50 +0800 | [diff] [blame] | 1396 | .reset = composite_disconnect, |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1397 | .disconnect = composite_disconnect, |
| 1398 | |
Andrzej Pietrasiewicz | 3a57187 | 2014-10-08 12:03:36 +0200 | [diff] [blame] | 1399 | .suspend = composite_suspend, |
| 1400 | .resume = composite_resume, |
| 1401 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1402 | .max_speed = USB_SPEED_SUPER, |
| 1403 | .driver = { |
| 1404 | .owner = THIS_MODULE, |
| 1405 | .name = "configfs-gadget", |
| 1406 | }, |
Krzysztof Opasiak | f1bddbb | 2016-05-05 10:46:05 +0200 | [diff] [blame] | 1407 | .match_existing_only = 1, |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1408 | }; |
| 1409 | |
| 1410 | static struct config_group *gadgets_make( |
| 1411 | struct config_group *group, |
| 1412 | const char *name) |
| 1413 | { |
| 1414 | struct gadget_info *gi; |
| 1415 | |
| 1416 | gi = kzalloc(sizeof(*gi), GFP_KERNEL); |
| 1417 | if (!gi) |
| 1418 | return ERR_PTR(-ENOMEM); |
| 1419 | |
Christoph Hellwig | 1ae1602 | 2016-02-26 11:02:14 +0100 | [diff] [blame] | 1420 | config_group_init_type_name(&gi->group, name, &gadget_root_type); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1421 | |
| 1422 | config_group_init_type_name(&gi->functions_group, "functions", |
| 1423 | &functions_type); |
Christoph Hellwig | 1ae1602 | 2016-02-26 11:02:14 +0100 | [diff] [blame] | 1424 | configfs_add_default_group(&gi->functions_group, &gi->group); |
| 1425 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1426 | config_group_init_type_name(&gi->configs_group, "configs", |
| 1427 | &config_desc_type); |
Christoph Hellwig | 1ae1602 | 2016-02-26 11:02:14 +0100 | [diff] [blame] | 1428 | configfs_add_default_group(&gi->configs_group, &gi->group); |
| 1429 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1430 | config_group_init_type_name(&gi->strings_group, "strings", |
| 1431 | &gadget_strings_strings_type); |
Christoph Hellwig | 1ae1602 | 2016-02-26 11:02:14 +0100 | [diff] [blame] | 1432 | configfs_add_default_group(&gi->strings_group, &gi->group); |
| 1433 | |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 1434 | config_group_init_type_name(&gi->os_desc_group, "os_desc", |
| 1435 | &os_desc_type); |
Christoph Hellwig | 1ae1602 | 2016-02-26 11:02:14 +0100 | [diff] [blame] | 1436 | configfs_add_default_group(&gi->os_desc_group, &gi->group); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1437 | |
| 1438 | gi->composite.bind = configfs_do_nothing; |
| 1439 | gi->composite.unbind = configfs_do_nothing; |
| 1440 | gi->composite.suspend = NULL; |
| 1441 | gi->composite.resume = NULL; |
| 1442 | gi->composite.max_speed = USB_SPEED_SUPER; |
| 1443 | |
| 1444 | mutex_init(&gi->lock); |
| 1445 | INIT_LIST_HEAD(&gi->string_list); |
| 1446 | INIT_LIST_HEAD(&gi->available_func); |
| 1447 | |
| 1448 | composite_init_dev(&gi->cdev); |
| 1449 | gi->cdev.desc.bLength = USB_DT_DEVICE_SIZE; |
| 1450 | gi->cdev.desc.bDescriptorType = USB_DT_DEVICE; |
| 1451 | gi->cdev.desc.bcdDevice = cpu_to_le16(get_default_bcdDevice()); |
| 1452 | |
| 1453 | gi->composite.gadget_driver = configfs_driver_template; |
| 1454 | |
| 1455 | gi->composite.gadget_driver.function = kstrdup(name, GFP_KERNEL); |
| 1456 | gi->composite.name = gi->composite.gadget_driver.function; |
| 1457 | |
| 1458 | if (!gi->composite.gadget_driver.function) |
| 1459 | goto err; |
| 1460 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1461 | return &gi->group; |
| 1462 | err: |
| 1463 | kfree(gi); |
| 1464 | return ERR_PTR(-ENOMEM); |
| 1465 | } |
| 1466 | |
| 1467 | static void gadgets_drop(struct config_group *group, struct config_item *item) |
| 1468 | { |
| 1469 | config_item_put(item); |
| 1470 | } |
| 1471 | |
| 1472 | static struct configfs_group_operations gadgets_ops = { |
| 1473 | .make_group = &gadgets_make, |
| 1474 | .drop_item = &gadgets_drop, |
| 1475 | }; |
| 1476 | |
| 1477 | static struct config_item_type gadgets_type = { |
| 1478 | .ct_group_ops = &gadgets_ops, |
| 1479 | .ct_owner = THIS_MODULE, |
| 1480 | }; |
| 1481 | |
| 1482 | static struct configfs_subsystem gadget_subsys = { |
| 1483 | .su_group = { |
| 1484 | .cg_item = { |
| 1485 | .ci_namebuf = "usb_gadget", |
| 1486 | .ci_type = &gadgets_type, |
| 1487 | }, |
| 1488 | }, |
| 1489 | .su_mutex = __MUTEX_INITIALIZER(gadget_subsys.su_mutex), |
| 1490 | }; |
| 1491 | |
Andrzej Pietrasiewicz | 092a4bd | 2013-09-26 14:38:15 +0200 | [diff] [blame] | 1492 | void unregister_gadget_item(struct config_item *item) |
| 1493 | { |
| 1494 | struct gadget_info *gi = to_gadget_info(item); |
| 1495 | |
Winter Wang | cee51c3 | 2016-07-27 10:03:19 +0800 | [diff] [blame] | 1496 | mutex_lock(&gi->lock); |
Andrzej Pietrasiewicz | 092a4bd | 2013-09-26 14:38:15 +0200 | [diff] [blame] | 1497 | unregister_gadget(gi); |
Winter Wang | cee51c3 | 2016-07-27 10:03:19 +0800 | [diff] [blame] | 1498 | mutex_unlock(&gi->lock); |
Andrzej Pietrasiewicz | 092a4bd | 2013-09-26 14:38:15 +0200 | [diff] [blame] | 1499 | } |
Felipe Balbi | 0700faa | 2014-04-01 13:19:32 -0500 | [diff] [blame] | 1500 | EXPORT_SYMBOL_GPL(unregister_gadget_item); |
Andrzej Pietrasiewicz | 092a4bd | 2013-09-26 14:38:15 +0200 | [diff] [blame] | 1501 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1502 | static int __init gadget_cfs_init(void) |
| 1503 | { |
| 1504 | int ret; |
| 1505 | |
| 1506 | config_group_init(&gadget_subsys.su_group); |
| 1507 | |
| 1508 | ret = configfs_register_subsystem(&gadget_subsys); |
| 1509 | return ret; |
| 1510 | } |
| 1511 | module_init(gadget_cfs_init); |
| 1512 | |
| 1513 | static void __exit gadget_cfs_exit(void) |
| 1514 | { |
| 1515 | configfs_unregister_subsystem(&gadget_subsys); |
| 1516 | } |
| 1517 | module_exit(gadget_cfs_exit); |