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 | |
Badhri Jagan Sridharan | 2187738 | 2014-12-15 10:44:47 -0800 | [diff] [blame] | 12 | #ifdef CONFIG_USB_CONFIGFS_UEVENT |
| 13 | #include <linux/platform_device.h> |
| 14 | #include <linux/kdev_t.h> |
| 15 | #include <linux/usb/ch9.h> |
Badhri Jagan Sridharan | 2187738 | 2014-12-15 10:44:47 -0800 | [diff] [blame] | 16 | |
| 17 | #ifdef CONFIG_USB_CONFIGFS_F_ACC |
| 18 | extern int acc_ctrlrequest(struct usb_composite_dev *cdev, |
| 19 | const struct usb_ctrlrequest *ctrl); |
| 20 | void acc_disconnect(void); |
| 21 | #endif |
| 22 | static struct class *android_class; |
Badhri Jagan Sridharan | d6b2d77 | 2015-03-27 14:15:19 -0700 | [diff] [blame] | 23 | static struct device *android_device; |
| 24 | static int index; |
| 25 | |
| 26 | struct device *create_function_device(char *name) |
| 27 | { |
| 28 | if (android_device && !IS_ERR(android_device)) |
| 29 | return device_create(android_class, android_device, |
| 30 | MKDEV(0, index++), NULL, name); |
| 31 | else |
| 32 | return ERR_PTR(-EINVAL); |
| 33 | } |
| 34 | EXPORT_SYMBOL_GPL(create_function_device); |
Badhri Jagan Sridharan | 2187738 | 2014-12-15 10:44:47 -0800 | [diff] [blame] | 35 | #endif |
| 36 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 37 | int check_user_usb_string(const char *name, |
| 38 | struct usb_gadget_strings *stringtab_dev) |
| 39 | { |
| 40 | unsigned primary_lang; |
| 41 | unsigned sub_lang; |
| 42 | u16 num; |
| 43 | int ret; |
| 44 | |
| 45 | ret = kstrtou16(name, 0, &num); |
| 46 | if (ret) |
| 47 | return ret; |
| 48 | |
| 49 | primary_lang = num & 0x3ff; |
| 50 | sub_lang = num >> 10; |
| 51 | |
| 52 | /* simple sanity check for valid langid */ |
| 53 | switch (primary_lang) { |
| 54 | case 0: |
| 55 | case 0x62 ... 0xfe: |
| 56 | case 0x100 ... 0x3ff: |
| 57 | return -EINVAL; |
| 58 | } |
| 59 | if (!sub_lang) |
| 60 | return -EINVAL; |
| 61 | |
| 62 | stringtab_dev->language = num; |
| 63 | return 0; |
| 64 | } |
| 65 | |
| 66 | #define MAX_NAME_LEN 40 |
| 67 | #define MAX_USB_STRING_LANGS 2 |
| 68 | |
Li Jun | 41ce84c | 2015-07-09 15:18:48 +0800 | [diff] [blame] | 69 | static const struct usb_descriptor_header *otg_desc[2]; |
| 70 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 71 | struct gadget_info { |
| 72 | struct config_group group; |
| 73 | struct config_group functions_group; |
| 74 | struct config_group configs_group; |
| 75 | struct config_group strings_group; |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 76 | struct config_group os_desc_group; |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 77 | |
| 78 | struct mutex lock; |
| 79 | struct usb_gadget_strings *gstrings[MAX_USB_STRING_LANGS + 1]; |
| 80 | struct list_head string_list; |
| 81 | struct list_head available_func; |
| 82 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 83 | struct usb_composite_driver composite; |
| 84 | struct usb_composite_dev cdev; |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 85 | bool use_os_desc; |
| 86 | char b_vendor_code; |
| 87 | char qw_sign[OS_STRING_QW_SIGN_LEN]; |
Peter Chen | aa919ef | 2019-08-26 15:10:55 -0400 | [diff] [blame] | 88 | spinlock_t spinlock; |
| 89 | bool unbind; |
Badhri Jagan Sridharan | 2187738 | 2014-12-15 10:44:47 -0800 | [diff] [blame] | 90 | #ifdef CONFIG_USB_CONFIGFS_UEVENT |
| 91 | bool connected; |
| 92 | bool sw_connected; |
| 93 | struct work_struct work; |
| 94 | struct device *dev; |
| 95 | #endif |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 96 | }; |
| 97 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 98 | static inline struct gadget_info *to_gadget_info(struct config_item *item) |
| 99 | { |
| 100 | return container_of(to_config_group(item), struct gadget_info, group); |
| 101 | } |
| 102 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 103 | struct config_usb_cfg { |
| 104 | struct config_group group; |
| 105 | struct config_group strings_group; |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 106 | struct list_head string_list; |
| 107 | struct usb_configuration c; |
| 108 | struct list_head func_list; |
| 109 | struct usb_gadget_strings *gstrings[MAX_USB_STRING_LANGS + 1]; |
| 110 | }; |
| 111 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 112 | static inline struct config_usb_cfg *to_config_usb_cfg(struct config_item *item) |
| 113 | { |
| 114 | return container_of(to_config_group(item), struct config_usb_cfg, |
| 115 | group); |
| 116 | } |
| 117 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 118 | struct gadget_strings { |
| 119 | struct usb_gadget_strings stringtab_dev; |
| 120 | struct usb_string strings[USB_GADGET_FIRST_AVAIL_IDX]; |
| 121 | char *manufacturer; |
| 122 | char *product; |
| 123 | char *serialnumber; |
| 124 | |
| 125 | struct config_group group; |
| 126 | struct list_head list; |
| 127 | }; |
| 128 | |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 129 | struct os_desc { |
| 130 | struct config_group group; |
| 131 | }; |
| 132 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 133 | struct gadget_config_name { |
| 134 | struct usb_gadget_strings stringtab_dev; |
| 135 | struct usb_string strings; |
| 136 | char *configuration; |
| 137 | |
| 138 | struct config_group group; |
| 139 | struct list_head list; |
| 140 | }; |
| 141 | |
| 142 | static int usb_string_copy(const char *s, char **s_copy) |
| 143 | { |
| 144 | int ret; |
| 145 | char *str; |
| 146 | char *copy = *s_copy; |
| 147 | ret = strlen(s); |
| 148 | if (ret > 126) |
| 149 | return -EOVERFLOW; |
| 150 | |
| 151 | str = kstrdup(s, GFP_KERNEL); |
| 152 | if (!str) |
| 153 | return -ENOMEM; |
| 154 | if (str[ret - 1] == '\n') |
| 155 | str[ret - 1] = '\0'; |
| 156 | kfree(copy); |
| 157 | *s_copy = str; |
| 158 | return 0; |
| 159 | } |
| 160 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 161 | #define GI_DEVICE_DESC_SIMPLE_R_u8(__name) \ |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 162 | 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] | 163 | char *page) \ |
| 164 | { \ |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 165 | return sprintf(page, "0x%02x\n", \ |
| 166 | to_gadget_info(item)->cdev.desc.__name); \ |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 167 | } |
| 168 | |
| 169 | #define GI_DEVICE_DESC_SIMPLE_R_u16(__name) \ |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 170 | 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] | 171 | char *page) \ |
| 172 | { \ |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 173 | return sprintf(page, "0x%04x\n", \ |
| 174 | le16_to_cpup(&to_gadget_info(item)->cdev.desc.__name)); \ |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 175 | } |
| 176 | |
| 177 | |
| 178 | #define GI_DEVICE_DESC_SIMPLE_W_u8(_name) \ |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 179 | 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] | 180 | const char *page, size_t len) \ |
| 181 | { \ |
| 182 | u8 val; \ |
| 183 | int ret; \ |
| 184 | ret = kstrtou8(page, 0, &val); \ |
| 185 | if (ret) \ |
| 186 | return ret; \ |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 187 | to_gadget_info(item)->cdev.desc._name = val; \ |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 188 | return len; \ |
| 189 | } |
| 190 | |
| 191 | #define GI_DEVICE_DESC_SIMPLE_W_u16(_name) \ |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 192 | 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] | 193 | const char *page, size_t len) \ |
| 194 | { \ |
| 195 | u16 val; \ |
| 196 | int ret; \ |
| 197 | ret = kstrtou16(page, 0, &val); \ |
| 198 | if (ret) \ |
| 199 | return ret; \ |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 200 | to_gadget_info(item)->cdev.desc._name = cpu_to_le16p(&val); \ |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 201 | return len; \ |
| 202 | } |
| 203 | |
| 204 | #define GI_DEVICE_DESC_SIMPLE_RW(_name, _type) \ |
| 205 | GI_DEVICE_DESC_SIMPLE_R_##_type(_name) \ |
| 206 | GI_DEVICE_DESC_SIMPLE_W_##_type(_name) |
| 207 | |
| 208 | GI_DEVICE_DESC_SIMPLE_R_u16(bcdUSB); |
| 209 | GI_DEVICE_DESC_SIMPLE_RW(bDeviceClass, u8); |
| 210 | GI_DEVICE_DESC_SIMPLE_RW(bDeviceSubClass, u8); |
| 211 | GI_DEVICE_DESC_SIMPLE_RW(bDeviceProtocol, u8); |
| 212 | GI_DEVICE_DESC_SIMPLE_RW(bMaxPacketSize0, u8); |
| 213 | GI_DEVICE_DESC_SIMPLE_RW(idVendor, u16); |
| 214 | GI_DEVICE_DESC_SIMPLE_RW(idProduct, u16); |
| 215 | GI_DEVICE_DESC_SIMPLE_R_u16(bcdDevice); |
| 216 | |
| 217 | static ssize_t is_valid_bcd(u16 bcd_val) |
| 218 | { |
| 219 | if ((bcd_val & 0xf) > 9) |
| 220 | return -EINVAL; |
| 221 | if (((bcd_val >> 4) & 0xf) > 9) |
| 222 | return -EINVAL; |
| 223 | if (((bcd_val >> 8) & 0xf) > 9) |
| 224 | return -EINVAL; |
| 225 | if (((bcd_val >> 12) & 0xf) > 9) |
| 226 | return -EINVAL; |
| 227 | return 0; |
| 228 | } |
| 229 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 230 | 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] | 231 | const char *page, size_t len) |
| 232 | { |
| 233 | u16 bcdDevice; |
| 234 | int ret; |
| 235 | |
| 236 | ret = kstrtou16(page, 0, &bcdDevice); |
| 237 | if (ret) |
| 238 | return ret; |
| 239 | ret = is_valid_bcd(bcdDevice); |
| 240 | if (ret) |
| 241 | return ret; |
| 242 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 243 | to_gadget_info(item)->cdev.desc.bcdDevice = cpu_to_le16(bcdDevice); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 244 | return len; |
| 245 | } |
| 246 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 247 | 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] | 248 | const char *page, size_t len) |
| 249 | { |
| 250 | u16 bcdUSB; |
| 251 | int ret; |
| 252 | |
| 253 | ret = kstrtou16(page, 0, &bcdUSB); |
| 254 | if (ret) |
| 255 | return ret; |
| 256 | ret = is_valid_bcd(bcdUSB); |
| 257 | if (ret) |
| 258 | return ret; |
| 259 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 260 | to_gadget_info(item)->cdev.desc.bcdUSB = cpu_to_le16(bcdUSB); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 261 | return len; |
| 262 | } |
| 263 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 264 | 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] | 265 | { |
Ruslan Bilovol | afdaadc | 2015-11-23 09:56:36 +0100 | [diff] [blame] | 266 | char *udc_name = to_gadget_info(item)->composite.gadget_driver.udc_name; |
| 267 | |
| 268 | return sprintf(page, "%s\n", udc_name ?: ""); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 269 | } |
| 270 | |
| 271 | static int unregister_gadget(struct gadget_info *gi) |
| 272 | { |
| 273 | int ret; |
| 274 | |
Ruslan Bilovol | afdaadc | 2015-11-23 09:56:36 +0100 | [diff] [blame] | 275 | if (!gi->composite.gadget_driver.udc_name) |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 276 | return -ENODEV; |
| 277 | |
| 278 | ret = usb_gadget_unregister_driver(&gi->composite.gadget_driver); |
| 279 | if (ret) |
| 280 | return ret; |
Ruslan Bilovol | afdaadc | 2015-11-23 09:56:36 +0100 | [diff] [blame] | 281 | kfree(gi->composite.gadget_driver.udc_name); |
| 282 | gi->composite.gadget_driver.udc_name = NULL; |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 283 | return 0; |
| 284 | } |
| 285 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 286 | 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] | 287 | const char *page, size_t len) |
| 288 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 289 | struct gadget_info *gi = to_gadget_info(item); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 290 | char *name; |
| 291 | int ret; |
| 292 | |
| 293 | name = kstrdup(page, GFP_KERNEL); |
| 294 | if (!name) |
| 295 | return -ENOMEM; |
| 296 | if (name[len - 1] == '\n') |
| 297 | name[len - 1] = '\0'; |
| 298 | |
| 299 | mutex_lock(&gi->lock); |
| 300 | |
Badhri Jagan Sridharan | 2187738 | 2014-12-15 10:44:47 -0800 | [diff] [blame] | 301 | if (!strlen(name) || strcmp(name, "none") == 0) { |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 302 | ret = unregister_gadget(gi); |
| 303 | if (ret) |
| 304 | goto err; |
John Keeping | 59682e7 | 2017-02-28 10:55:30 +0000 | [diff] [blame] | 305 | kfree(name); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 306 | } else { |
Ruslan Bilovol | afdaadc | 2015-11-23 09:56:36 +0100 | [diff] [blame] | 307 | if (gi->composite.gadget_driver.udc_name) { |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 308 | ret = -EBUSY; |
| 309 | goto err; |
| 310 | } |
Ruslan Bilovol | afdaadc | 2015-11-23 09:56:36 +0100 | [diff] [blame] | 311 | gi->composite.gadget_driver.udc_name = name; |
| 312 | ret = usb_gadget_probe_driver(&gi->composite.gadget_driver); |
| 313 | if (ret) { |
| 314 | gi->composite.gadget_driver.udc_name = NULL; |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 315 | goto err; |
Ruslan Bilovol | afdaadc | 2015-11-23 09:56:36 +0100 | [diff] [blame] | 316 | } |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 317 | } |
| 318 | mutex_unlock(&gi->lock); |
| 319 | return len; |
| 320 | err: |
| 321 | kfree(name); |
| 322 | mutex_unlock(&gi->lock); |
| 323 | return ret; |
| 324 | } |
| 325 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 326 | CONFIGFS_ATTR(gadget_dev_desc_, bDeviceClass); |
| 327 | CONFIGFS_ATTR(gadget_dev_desc_, bDeviceSubClass); |
| 328 | CONFIGFS_ATTR(gadget_dev_desc_, bDeviceProtocol); |
| 329 | CONFIGFS_ATTR(gadget_dev_desc_, bMaxPacketSize0); |
| 330 | CONFIGFS_ATTR(gadget_dev_desc_, idVendor); |
| 331 | CONFIGFS_ATTR(gadget_dev_desc_, idProduct); |
| 332 | CONFIGFS_ATTR(gadget_dev_desc_, bcdDevice); |
| 333 | CONFIGFS_ATTR(gadget_dev_desc_, bcdUSB); |
| 334 | CONFIGFS_ATTR(gadget_dev_desc_, UDC); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 335 | |
| 336 | static struct configfs_attribute *gadget_root_attrs[] = { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 337 | &gadget_dev_desc_attr_bDeviceClass, |
| 338 | &gadget_dev_desc_attr_bDeviceSubClass, |
| 339 | &gadget_dev_desc_attr_bDeviceProtocol, |
| 340 | &gadget_dev_desc_attr_bMaxPacketSize0, |
| 341 | &gadget_dev_desc_attr_idVendor, |
| 342 | &gadget_dev_desc_attr_idProduct, |
| 343 | &gadget_dev_desc_attr_bcdDevice, |
| 344 | &gadget_dev_desc_attr_bcdUSB, |
| 345 | &gadget_dev_desc_attr_UDC, |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 346 | NULL, |
| 347 | }; |
| 348 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 349 | static inline struct gadget_strings *to_gadget_strings(struct config_item *item) |
| 350 | { |
| 351 | return container_of(to_config_group(item), struct gadget_strings, |
| 352 | group); |
| 353 | } |
| 354 | |
| 355 | static inline struct gadget_config_name *to_gadget_config_name( |
| 356 | struct config_item *item) |
| 357 | { |
| 358 | return container_of(to_config_group(item), struct gadget_config_name, |
| 359 | group); |
| 360 | } |
| 361 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 362 | static inline struct usb_function_instance *to_usb_function_instance( |
| 363 | struct config_item *item) |
| 364 | { |
| 365 | return container_of(to_config_group(item), |
| 366 | struct usb_function_instance, group); |
| 367 | } |
| 368 | |
| 369 | static void gadget_info_attr_release(struct config_item *item) |
| 370 | { |
| 371 | struct gadget_info *gi = to_gadget_info(item); |
| 372 | |
| 373 | WARN_ON(!list_empty(&gi->cdev.configs)); |
| 374 | WARN_ON(!list_empty(&gi->string_list)); |
| 375 | WARN_ON(!list_empty(&gi->available_func)); |
| 376 | kfree(gi->composite.gadget_driver.function); |
| 377 | kfree(gi); |
| 378 | } |
| 379 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 380 | static struct configfs_item_operations gadget_root_item_ops = { |
| 381 | .release = gadget_info_attr_release, |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 382 | }; |
| 383 | |
| 384 | static void gadget_config_attr_release(struct config_item *item) |
| 385 | { |
| 386 | struct config_usb_cfg *cfg = to_config_usb_cfg(item); |
| 387 | |
| 388 | WARN_ON(!list_empty(&cfg->c.functions)); |
| 389 | list_del(&cfg->c.list); |
| 390 | kfree(cfg->c.label); |
| 391 | kfree(cfg); |
| 392 | } |
| 393 | |
| 394 | static int config_usb_cfg_link( |
| 395 | struct config_item *usb_cfg_ci, |
| 396 | struct config_item *usb_func_ci) |
| 397 | { |
| 398 | struct config_usb_cfg *cfg = to_config_usb_cfg(usb_cfg_ci); |
| 399 | struct usb_composite_dev *cdev = cfg->c.cdev; |
| 400 | struct gadget_info *gi = container_of(cdev, struct gadget_info, cdev); |
| 401 | |
| 402 | struct config_group *group = to_config_group(usb_func_ci); |
| 403 | struct usb_function_instance *fi = container_of(group, |
| 404 | struct usb_function_instance, group); |
| 405 | struct usb_function_instance *a_fi; |
| 406 | struct usb_function *f; |
| 407 | int ret; |
| 408 | |
| 409 | mutex_lock(&gi->lock); |
| 410 | /* |
| 411 | * Make sure this function is from within our _this_ gadget and not |
| 412 | * from another gadget or a random directory. |
| 413 | * Also a function instance can only be linked once. |
| 414 | */ |
| 415 | list_for_each_entry(a_fi, &gi->available_func, cfs_list) { |
| 416 | if (a_fi == fi) |
| 417 | break; |
| 418 | } |
| 419 | if (a_fi != fi) { |
| 420 | ret = -EINVAL; |
| 421 | goto out; |
| 422 | } |
| 423 | |
| 424 | list_for_each_entry(f, &cfg->func_list, list) { |
| 425 | if (f->fi == fi) { |
| 426 | ret = -EEXIST; |
| 427 | goto out; |
| 428 | } |
| 429 | } |
| 430 | |
| 431 | f = usb_get_function(fi); |
| 432 | if (IS_ERR(f)) { |
| 433 | ret = PTR_ERR(f); |
| 434 | goto out; |
| 435 | } |
| 436 | |
| 437 | /* stash the function until we bind it to the gadget */ |
| 438 | list_add_tail(&f->list, &cfg->func_list); |
| 439 | ret = 0; |
| 440 | out: |
| 441 | mutex_unlock(&gi->lock); |
| 442 | return ret; |
| 443 | } |
| 444 | |
| 445 | static int config_usb_cfg_unlink( |
| 446 | struct config_item *usb_cfg_ci, |
| 447 | struct config_item *usb_func_ci) |
| 448 | { |
| 449 | struct config_usb_cfg *cfg = to_config_usb_cfg(usb_cfg_ci); |
| 450 | struct usb_composite_dev *cdev = cfg->c.cdev; |
| 451 | struct gadget_info *gi = container_of(cdev, struct gadget_info, cdev); |
| 452 | |
| 453 | struct config_group *group = to_config_group(usb_func_ci); |
| 454 | struct usb_function_instance *fi = container_of(group, |
| 455 | struct usb_function_instance, group); |
| 456 | struct usb_function *f; |
| 457 | |
| 458 | /* |
| 459 | * ideally I would like to forbid to unlink functions while a gadget is |
| 460 | * bound to an UDC. Since this isn't possible at the moment, we simply |
| 461 | * force an unbind, the function is available here and then we can |
| 462 | * remove the function. |
| 463 | */ |
| 464 | mutex_lock(&gi->lock); |
Ruslan Bilovol | afdaadc | 2015-11-23 09:56:36 +0100 | [diff] [blame] | 465 | if (gi->composite.gadget_driver.udc_name) |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 466 | unregister_gadget(gi); |
Ruslan Bilovol | afdaadc | 2015-11-23 09:56:36 +0100 | [diff] [blame] | 467 | WARN_ON(gi->composite.gadget_driver.udc_name); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 468 | |
| 469 | list_for_each_entry(f, &cfg->func_list, list) { |
| 470 | if (f->fi == fi) { |
| 471 | list_del(&f->list); |
| 472 | usb_put_function(f); |
| 473 | mutex_unlock(&gi->lock); |
| 474 | return 0; |
| 475 | } |
| 476 | } |
| 477 | mutex_unlock(&gi->lock); |
David Rientjes | 75bfe23 | 2013-04-07 14:11:47 -0700 | [diff] [blame] | 478 | WARN(1, "Unable to locate function to unbind\n"); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 479 | return 0; |
| 480 | } |
| 481 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 482 | static struct configfs_item_operations gadget_config_item_ops = { |
| 483 | .release = gadget_config_attr_release, |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 484 | .allow_link = config_usb_cfg_link, |
| 485 | .drop_link = config_usb_cfg_unlink, |
| 486 | }; |
| 487 | |
| 488 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 489 | 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] | 490 | char *page) |
| 491 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 492 | 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] | 493 | } |
| 494 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 495 | 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] | 496 | const char *page, size_t len) |
| 497 | { |
| 498 | u16 val; |
| 499 | int ret; |
| 500 | ret = kstrtou16(page, 0, &val); |
| 501 | if (ret) |
| 502 | return ret; |
| 503 | if (DIV_ROUND_UP(val, 8) > 0xff) |
| 504 | return -ERANGE; |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 505 | to_config_usb_cfg(item)->c.MaxPower = val; |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 506 | return len; |
| 507 | } |
| 508 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 509 | 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] | 510 | char *page) |
| 511 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 512 | return sprintf(page, "0x%02x\n", |
| 513 | to_config_usb_cfg(item)->c.bmAttributes); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 514 | } |
| 515 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 516 | 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] | 517 | const char *page, size_t len) |
| 518 | { |
| 519 | u8 val; |
| 520 | int ret; |
| 521 | ret = kstrtou8(page, 0, &val); |
| 522 | if (ret) |
| 523 | return ret; |
| 524 | if (!(val & USB_CONFIG_ATT_ONE)) |
| 525 | return -EINVAL; |
| 526 | if (val & ~(USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER | |
| 527 | USB_CONFIG_ATT_WAKEUP)) |
| 528 | return -EINVAL; |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 529 | to_config_usb_cfg(item)->c.bmAttributes = val; |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 530 | return len; |
| 531 | } |
| 532 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 533 | CONFIGFS_ATTR(gadget_config_desc_, MaxPower); |
| 534 | CONFIGFS_ATTR(gadget_config_desc_, bmAttributes); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 535 | |
| 536 | static struct configfs_attribute *gadget_config_attrs[] = { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 537 | &gadget_config_desc_attr_MaxPower, |
| 538 | &gadget_config_desc_attr_bmAttributes, |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 539 | NULL, |
| 540 | }; |
| 541 | |
| 542 | static struct config_item_type gadget_config_type = { |
| 543 | .ct_item_ops = &gadget_config_item_ops, |
| 544 | .ct_attrs = gadget_config_attrs, |
| 545 | .ct_owner = THIS_MODULE, |
| 546 | }; |
| 547 | |
| 548 | static struct config_item_type gadget_root_type = { |
| 549 | .ct_item_ops = &gadget_root_item_ops, |
| 550 | .ct_attrs = gadget_root_attrs, |
| 551 | .ct_owner = THIS_MODULE, |
| 552 | }; |
| 553 | |
| 554 | static void composite_init_dev(struct usb_composite_dev *cdev) |
| 555 | { |
| 556 | spin_lock_init(&cdev->lock); |
| 557 | INIT_LIST_HEAD(&cdev->configs); |
| 558 | INIT_LIST_HEAD(&cdev->gstrings); |
| 559 | } |
| 560 | |
| 561 | static struct config_group *function_make( |
| 562 | struct config_group *group, |
| 563 | const char *name) |
| 564 | { |
| 565 | struct gadget_info *gi; |
| 566 | struct usb_function_instance *fi; |
| 567 | char buf[MAX_NAME_LEN]; |
| 568 | char *func_name; |
| 569 | char *instance_name; |
| 570 | int ret; |
| 571 | |
| 572 | ret = snprintf(buf, MAX_NAME_LEN, "%s", name); |
| 573 | if (ret >= MAX_NAME_LEN) |
| 574 | return ERR_PTR(-ENAMETOOLONG); |
| 575 | |
| 576 | func_name = buf; |
| 577 | instance_name = strchr(func_name, '.'); |
| 578 | if (!instance_name) { |
| 579 | pr_err("Unable to locate . in FUNC.INSTANCE\n"); |
| 580 | return ERR_PTR(-EINVAL); |
| 581 | } |
| 582 | *instance_name = '\0'; |
| 583 | instance_name++; |
| 584 | |
| 585 | fi = usb_get_function_instance(func_name); |
| 586 | if (IS_ERR(fi)) |
Duan Jiong | a346941 | 2013-09-26 15:55:25 +0800 | [diff] [blame] | 587 | return ERR_CAST(fi); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 588 | |
Nicolas Iooss | 3958b79 | 2015-07-17 16:23:45 -0700 | [diff] [blame] | 589 | ret = config_item_set_name(&fi->group.cg_item, "%s", name); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 590 | if (ret) { |
| 591 | usb_put_function_instance(fi); |
| 592 | return ERR_PTR(ret); |
| 593 | } |
Andrzej Pietrasiewicz | 1933861 | 2013-12-03 15:15:21 +0100 | [diff] [blame] | 594 | if (fi->set_inst_name) { |
| 595 | ret = fi->set_inst_name(fi, instance_name); |
| 596 | if (ret) { |
| 597 | usb_put_function_instance(fi); |
| 598 | return ERR_PTR(ret); |
| 599 | } |
| 600 | } |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 601 | |
| 602 | gi = container_of(group, struct gadget_info, functions_group); |
| 603 | |
| 604 | mutex_lock(&gi->lock); |
| 605 | list_add_tail(&fi->cfs_list, &gi->available_func); |
| 606 | mutex_unlock(&gi->lock); |
| 607 | return &fi->group; |
| 608 | } |
| 609 | |
| 610 | static void function_drop( |
| 611 | struct config_group *group, |
| 612 | struct config_item *item) |
| 613 | { |
| 614 | struct usb_function_instance *fi = to_usb_function_instance(item); |
| 615 | struct gadget_info *gi; |
| 616 | |
| 617 | gi = container_of(group, struct gadget_info, functions_group); |
| 618 | |
| 619 | mutex_lock(&gi->lock); |
| 620 | list_del(&fi->cfs_list); |
| 621 | mutex_unlock(&gi->lock); |
| 622 | config_item_put(item); |
| 623 | } |
| 624 | |
| 625 | static struct configfs_group_operations functions_ops = { |
| 626 | .make_group = &function_make, |
| 627 | .drop_item = &function_drop, |
| 628 | }; |
| 629 | |
| 630 | static struct config_item_type functions_type = { |
| 631 | .ct_group_ops = &functions_ops, |
| 632 | .ct_owner = THIS_MODULE, |
| 633 | }; |
| 634 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 635 | GS_STRINGS_RW(gadget_config_name, configuration); |
| 636 | |
| 637 | static struct configfs_attribute *gadget_config_name_langid_attrs[] = { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 638 | &gadget_config_name_attr_configuration, |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 639 | NULL, |
| 640 | }; |
| 641 | |
| 642 | static void gadget_config_name_attr_release(struct config_item *item) |
| 643 | { |
| 644 | struct gadget_config_name *cn = to_gadget_config_name(item); |
| 645 | |
| 646 | kfree(cn->configuration); |
| 647 | |
| 648 | list_del(&cn->list); |
| 649 | kfree(cn); |
| 650 | } |
| 651 | |
| 652 | USB_CONFIG_STRING_RW_OPS(gadget_config_name); |
| 653 | USB_CONFIG_STRINGS_LANG(gadget_config_name, config_usb_cfg); |
| 654 | |
| 655 | static struct config_group *config_desc_make( |
| 656 | struct config_group *group, |
| 657 | const char *name) |
| 658 | { |
| 659 | struct gadget_info *gi; |
| 660 | struct config_usb_cfg *cfg; |
| 661 | char buf[MAX_NAME_LEN]; |
| 662 | char *num_str; |
| 663 | u8 num; |
| 664 | int ret; |
| 665 | |
| 666 | gi = container_of(group, struct gadget_info, configs_group); |
| 667 | ret = snprintf(buf, MAX_NAME_LEN, "%s", name); |
| 668 | if (ret >= MAX_NAME_LEN) |
| 669 | return ERR_PTR(-ENAMETOOLONG); |
| 670 | |
| 671 | num_str = strchr(buf, '.'); |
| 672 | if (!num_str) { |
| 673 | pr_err("Unable to locate . in name.bConfigurationValue\n"); |
| 674 | return ERR_PTR(-EINVAL); |
| 675 | } |
| 676 | |
| 677 | *num_str = '\0'; |
| 678 | num_str++; |
| 679 | |
| 680 | if (!strlen(buf)) |
| 681 | return ERR_PTR(-EINVAL); |
| 682 | |
| 683 | ret = kstrtou8(num_str, 0, &num); |
| 684 | if (ret) |
| 685 | return ERR_PTR(ret); |
| 686 | |
| 687 | cfg = kzalloc(sizeof(*cfg), GFP_KERNEL); |
| 688 | if (!cfg) |
| 689 | return ERR_PTR(-ENOMEM); |
| 690 | cfg->c.label = kstrdup(buf, GFP_KERNEL); |
| 691 | if (!cfg->c.label) { |
| 692 | ret = -ENOMEM; |
| 693 | goto err; |
| 694 | } |
| 695 | cfg->c.bConfigurationValue = num; |
| 696 | cfg->c.MaxPower = CONFIG_USB_GADGET_VBUS_DRAW; |
| 697 | cfg->c.bmAttributes = USB_CONFIG_ATT_ONE; |
| 698 | INIT_LIST_HEAD(&cfg->string_list); |
| 699 | INIT_LIST_HEAD(&cfg->func_list); |
| 700 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 701 | config_group_init_type_name(&cfg->group, name, |
| 702 | &gadget_config_type); |
Christoph Hellwig | 1ae1602 | 2016-02-26 11:02:14 +0100 | [diff] [blame] | 703 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 704 | config_group_init_type_name(&cfg->strings_group, "strings", |
| 705 | &gadget_config_name_strings_type); |
Christoph Hellwig | 1ae1602 | 2016-02-26 11:02:14 +0100 | [diff] [blame] | 706 | configfs_add_default_group(&cfg->strings_group, &cfg->group); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 707 | |
| 708 | ret = usb_add_config_only(&gi->cdev, &cfg->c); |
| 709 | if (ret) |
| 710 | goto err; |
| 711 | |
| 712 | return &cfg->group; |
| 713 | err: |
| 714 | kfree(cfg->c.label); |
| 715 | kfree(cfg); |
| 716 | return ERR_PTR(ret); |
| 717 | } |
| 718 | |
| 719 | static void config_desc_drop( |
| 720 | struct config_group *group, |
| 721 | struct config_item *item) |
| 722 | { |
| 723 | config_item_put(item); |
| 724 | } |
| 725 | |
| 726 | static struct configfs_group_operations config_desc_ops = { |
| 727 | .make_group = &config_desc_make, |
| 728 | .drop_item = &config_desc_drop, |
| 729 | }; |
| 730 | |
| 731 | static struct config_item_type config_desc_type = { |
| 732 | .ct_group_ops = &config_desc_ops, |
| 733 | .ct_owner = THIS_MODULE, |
| 734 | }; |
| 735 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 736 | GS_STRINGS_RW(gadget_strings, manufacturer); |
| 737 | GS_STRINGS_RW(gadget_strings, product); |
| 738 | GS_STRINGS_RW(gadget_strings, serialnumber); |
| 739 | |
| 740 | static struct configfs_attribute *gadget_strings_langid_attrs[] = { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 741 | &gadget_strings_attr_manufacturer, |
| 742 | &gadget_strings_attr_product, |
| 743 | &gadget_strings_attr_serialnumber, |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 744 | NULL, |
| 745 | }; |
| 746 | |
| 747 | static void gadget_strings_attr_release(struct config_item *item) |
| 748 | { |
| 749 | struct gadget_strings *gs = to_gadget_strings(item); |
| 750 | |
| 751 | kfree(gs->manufacturer); |
| 752 | kfree(gs->product); |
| 753 | kfree(gs->serialnumber); |
| 754 | |
| 755 | list_del(&gs->list); |
| 756 | kfree(gs); |
| 757 | } |
| 758 | |
| 759 | USB_CONFIG_STRING_RW_OPS(gadget_strings); |
| 760 | USB_CONFIG_STRINGS_LANG(gadget_strings, gadget_info); |
| 761 | |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 762 | static inline struct os_desc *to_os_desc(struct config_item *item) |
| 763 | { |
| 764 | return container_of(to_config_group(item), struct os_desc, group); |
| 765 | } |
| 766 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 767 | static inline struct gadget_info *os_desc_item_to_gadget_info( |
| 768 | struct config_item *item) |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 769 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 770 | 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] | 771 | } |
| 772 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 773 | static ssize_t os_desc_use_show(struct config_item *item, char *page) |
| 774 | { |
| 775 | return sprintf(page, "%d", |
| 776 | os_desc_item_to_gadget_info(item)->use_os_desc); |
| 777 | } |
| 778 | |
| 779 | 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] | 780 | size_t len) |
| 781 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 782 | struct gadget_info *gi = os_desc_item_to_gadget_info(item); |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 783 | int ret; |
| 784 | bool use; |
| 785 | |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 786 | mutex_lock(&gi->lock); |
| 787 | ret = strtobool(page, &use); |
| 788 | if (!ret) { |
| 789 | gi->use_os_desc = use; |
| 790 | ret = len; |
| 791 | } |
| 792 | mutex_unlock(&gi->lock); |
| 793 | |
| 794 | return ret; |
| 795 | } |
| 796 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 797 | 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] | 798 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 799 | return sprintf(page, "%d", |
| 800 | os_desc_item_to_gadget_info(item)->b_vendor_code); |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 801 | } |
| 802 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 803 | 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] | 804 | const char *page, size_t len) |
| 805 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 806 | struct gadget_info *gi = os_desc_item_to_gadget_info(item); |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 807 | int ret; |
| 808 | u8 b_vendor_code; |
| 809 | |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 810 | mutex_lock(&gi->lock); |
| 811 | ret = kstrtou8(page, 0, &b_vendor_code); |
| 812 | if (!ret) { |
| 813 | gi->b_vendor_code = b_vendor_code; |
| 814 | ret = len; |
| 815 | } |
| 816 | mutex_unlock(&gi->lock); |
| 817 | |
| 818 | return ret; |
| 819 | } |
| 820 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 821 | 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] | 822 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 823 | struct gadget_info *gi = os_desc_item_to_gadget_info(item); |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 824 | |
| 825 | memcpy(page, gi->qw_sign, OS_STRING_QW_SIGN_LEN); |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 826 | return OS_STRING_QW_SIGN_LEN; |
| 827 | } |
| 828 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 829 | 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] | 830 | size_t len) |
| 831 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 832 | struct gadget_info *gi = os_desc_item_to_gadget_info(item); |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 833 | int res, l; |
| 834 | |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 835 | l = min((int)len, OS_STRING_QW_SIGN_LEN >> 1); |
| 836 | if (page[l - 1] == '\n') |
| 837 | --l; |
| 838 | |
| 839 | mutex_lock(&gi->lock); |
| 840 | res = utf8s_to_utf16s(page, l, |
| 841 | UTF16_LITTLE_ENDIAN, (wchar_t *) gi->qw_sign, |
| 842 | OS_STRING_QW_SIGN_LEN); |
| 843 | if (res > 0) |
| 844 | res = len; |
| 845 | mutex_unlock(&gi->lock); |
| 846 | |
| 847 | return res; |
| 848 | } |
| 849 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 850 | CONFIGFS_ATTR(os_desc_, use); |
| 851 | CONFIGFS_ATTR(os_desc_, b_vendor_code); |
| 852 | CONFIGFS_ATTR(os_desc_, qw_sign); |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 853 | |
| 854 | static struct configfs_attribute *os_desc_attrs[] = { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 855 | &os_desc_attr_use, |
| 856 | &os_desc_attr_b_vendor_code, |
| 857 | &os_desc_attr_qw_sign, |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 858 | NULL, |
| 859 | }; |
| 860 | |
| 861 | static void os_desc_attr_release(struct config_item *item) |
| 862 | { |
| 863 | struct os_desc *os_desc = to_os_desc(item); |
| 864 | kfree(os_desc); |
| 865 | } |
| 866 | |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 867 | static int os_desc_link(struct config_item *os_desc_ci, |
| 868 | struct config_item *usb_cfg_ci) |
| 869 | { |
| 870 | struct gadget_info *gi = container_of(to_config_group(os_desc_ci), |
| 871 | struct gadget_info, os_desc_group); |
| 872 | struct usb_composite_dev *cdev = &gi->cdev; |
| 873 | struct config_usb_cfg *c_target = |
| 874 | container_of(to_config_group(usb_cfg_ci), |
| 875 | struct config_usb_cfg, group); |
| 876 | struct usb_configuration *c; |
| 877 | int ret; |
| 878 | |
| 879 | mutex_lock(&gi->lock); |
| 880 | list_for_each_entry(c, &cdev->configs, list) { |
| 881 | if (c == &c_target->c) |
| 882 | break; |
| 883 | } |
| 884 | if (c != &c_target->c) { |
| 885 | ret = -EINVAL; |
| 886 | goto out; |
| 887 | } |
| 888 | |
| 889 | if (cdev->os_desc_config) { |
| 890 | ret = -EBUSY; |
| 891 | goto out; |
| 892 | } |
| 893 | |
| 894 | cdev->os_desc_config = &c_target->c; |
| 895 | ret = 0; |
| 896 | |
| 897 | out: |
| 898 | mutex_unlock(&gi->lock); |
| 899 | return ret; |
| 900 | } |
| 901 | |
| 902 | static int os_desc_unlink(struct config_item *os_desc_ci, |
| 903 | struct config_item *usb_cfg_ci) |
| 904 | { |
| 905 | struct gadget_info *gi = container_of(to_config_group(os_desc_ci), |
| 906 | struct gadget_info, os_desc_group); |
| 907 | struct usb_composite_dev *cdev = &gi->cdev; |
| 908 | |
| 909 | mutex_lock(&gi->lock); |
Ruslan Bilovol | afdaadc | 2015-11-23 09:56:36 +0100 | [diff] [blame] | 910 | if (gi->composite.gadget_driver.udc_name) |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 911 | unregister_gadget(gi); |
| 912 | cdev->os_desc_config = NULL; |
Ruslan Bilovol | afdaadc | 2015-11-23 09:56:36 +0100 | [diff] [blame] | 913 | WARN_ON(gi->composite.gadget_driver.udc_name); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 914 | mutex_unlock(&gi->lock); |
| 915 | return 0; |
| 916 | } |
| 917 | |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 918 | static struct configfs_item_operations os_desc_ops = { |
| 919 | .release = os_desc_attr_release, |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 920 | .allow_link = os_desc_link, |
| 921 | .drop_link = os_desc_unlink, |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 922 | }; |
| 923 | |
| 924 | static struct config_item_type os_desc_type = { |
| 925 | .ct_item_ops = &os_desc_ops, |
| 926 | .ct_attrs = os_desc_attrs, |
| 927 | .ct_owner = THIS_MODULE, |
| 928 | }; |
| 929 | |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 930 | static inline struct usb_os_desc_ext_prop |
| 931 | *to_usb_os_desc_ext_prop(struct config_item *item) |
| 932 | { |
| 933 | return container_of(item, struct usb_os_desc_ext_prop, item); |
| 934 | } |
| 935 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 936 | 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] | 937 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 938 | return sprintf(page, "%d", to_usb_os_desc_ext_prop(item)->type); |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 939 | } |
| 940 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 941 | static ssize_t ext_prop_type_store(struct config_item *item, |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 942 | const char *page, size_t len) |
| 943 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 944 | 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] | 945 | struct usb_os_desc *desc = to_usb_os_desc(ext_prop->item.ci_parent); |
| 946 | u8 type; |
| 947 | int ret; |
| 948 | |
| 949 | if (desc->opts_mutex) |
| 950 | mutex_lock(desc->opts_mutex); |
| 951 | ret = kstrtou8(page, 0, &type); |
| 952 | if (ret) |
| 953 | goto end; |
| 954 | if (type < USB_EXT_PROP_UNICODE || type > USB_EXT_PROP_UNICODE_MULTI) { |
| 955 | ret = -EINVAL; |
| 956 | goto end; |
| 957 | } |
| 958 | |
| 959 | if ((ext_prop->type == USB_EXT_PROP_BINARY || |
| 960 | ext_prop->type == USB_EXT_PROP_LE32 || |
| 961 | ext_prop->type == USB_EXT_PROP_BE32) && |
| 962 | (type == USB_EXT_PROP_UNICODE || |
| 963 | type == USB_EXT_PROP_UNICODE_ENV || |
| 964 | type == USB_EXT_PROP_UNICODE_LINK)) |
| 965 | ext_prop->data_len <<= 1; |
| 966 | else if ((ext_prop->type == USB_EXT_PROP_UNICODE || |
| 967 | ext_prop->type == USB_EXT_PROP_UNICODE_ENV || |
| 968 | ext_prop->type == USB_EXT_PROP_UNICODE_LINK) && |
| 969 | (type == USB_EXT_PROP_BINARY || |
| 970 | type == USB_EXT_PROP_LE32 || |
| 971 | type == USB_EXT_PROP_BE32)) |
| 972 | ext_prop->data_len >>= 1; |
| 973 | ext_prop->type = type; |
| 974 | ret = len; |
| 975 | |
| 976 | end: |
| 977 | if (desc->opts_mutex) |
| 978 | mutex_unlock(desc->opts_mutex); |
| 979 | return ret; |
| 980 | } |
| 981 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 982 | 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] | 983 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 984 | 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] | 985 | int len = ext_prop->data_len; |
| 986 | |
| 987 | if (ext_prop->type == USB_EXT_PROP_UNICODE || |
| 988 | ext_prop->type == USB_EXT_PROP_UNICODE_ENV || |
| 989 | ext_prop->type == USB_EXT_PROP_UNICODE_LINK) |
| 990 | len >>= 1; |
| 991 | memcpy(page, ext_prop->data, len); |
| 992 | |
| 993 | return len; |
| 994 | } |
| 995 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 996 | static ssize_t ext_prop_data_store(struct config_item *item, |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 997 | const char *page, size_t len) |
| 998 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 999 | 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] | 1000 | struct usb_os_desc *desc = to_usb_os_desc(ext_prop->item.ci_parent); |
| 1001 | char *new_data; |
| 1002 | size_t ret_len = len; |
| 1003 | |
| 1004 | if (page[len - 1] == '\n' || page[len - 1] == '\0') |
| 1005 | --len; |
Benoit Taine | 58b949e | 2014-05-26 17:21:20 +0200 | [diff] [blame] | 1006 | new_data = kmemdup(page, len, GFP_KERNEL); |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 1007 | if (!new_data) |
| 1008 | return -ENOMEM; |
| 1009 | |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 1010 | if (desc->opts_mutex) |
| 1011 | mutex_lock(desc->opts_mutex); |
| 1012 | kfree(ext_prop->data); |
| 1013 | ext_prop->data = new_data; |
| 1014 | desc->ext_prop_len -= ext_prop->data_len; |
| 1015 | ext_prop->data_len = len; |
| 1016 | desc->ext_prop_len += ext_prop->data_len; |
| 1017 | if (ext_prop->type == USB_EXT_PROP_UNICODE || |
| 1018 | ext_prop->type == USB_EXT_PROP_UNICODE_ENV || |
| 1019 | ext_prop->type == USB_EXT_PROP_UNICODE_LINK) { |
| 1020 | desc->ext_prop_len -= ext_prop->data_len; |
| 1021 | ext_prop->data_len <<= 1; |
| 1022 | ext_prop->data_len += 2; |
| 1023 | desc->ext_prop_len += ext_prop->data_len; |
| 1024 | } |
| 1025 | if (desc->opts_mutex) |
| 1026 | mutex_unlock(desc->opts_mutex); |
| 1027 | return ret_len; |
| 1028 | } |
| 1029 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 1030 | CONFIGFS_ATTR(ext_prop_, type); |
| 1031 | CONFIGFS_ATTR(ext_prop_, data); |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 1032 | |
| 1033 | static struct configfs_attribute *ext_prop_attrs[] = { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 1034 | &ext_prop_attr_type, |
| 1035 | &ext_prop_attr_data, |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 1036 | NULL, |
| 1037 | }; |
| 1038 | |
| 1039 | static void usb_os_desc_ext_prop_release(struct config_item *item) |
| 1040 | { |
| 1041 | struct usb_os_desc_ext_prop *ext_prop = to_usb_os_desc_ext_prop(item); |
| 1042 | |
| 1043 | kfree(ext_prop); /* frees a whole chunk */ |
| 1044 | } |
| 1045 | |
| 1046 | static struct configfs_item_operations ext_prop_ops = { |
| 1047 | .release = usb_os_desc_ext_prop_release, |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 1048 | }; |
| 1049 | |
| 1050 | static struct config_item *ext_prop_make( |
| 1051 | struct config_group *group, |
| 1052 | const char *name) |
| 1053 | { |
| 1054 | struct usb_os_desc_ext_prop *ext_prop; |
| 1055 | struct config_item_type *ext_prop_type; |
| 1056 | struct usb_os_desc *desc; |
| 1057 | char *vlabuf; |
| 1058 | |
| 1059 | vla_group(data_chunk); |
| 1060 | vla_item(data_chunk, struct usb_os_desc_ext_prop, ext_prop, 1); |
| 1061 | vla_item(data_chunk, struct config_item_type, ext_prop_type, 1); |
| 1062 | |
| 1063 | vlabuf = kzalloc(vla_group_size(data_chunk), GFP_KERNEL); |
| 1064 | if (!vlabuf) |
| 1065 | return ERR_PTR(-ENOMEM); |
| 1066 | |
| 1067 | ext_prop = vla_ptr(vlabuf, data_chunk, ext_prop); |
| 1068 | ext_prop_type = vla_ptr(vlabuf, data_chunk, ext_prop_type); |
| 1069 | |
| 1070 | desc = container_of(group, struct usb_os_desc, group); |
| 1071 | ext_prop_type->ct_item_ops = &ext_prop_ops; |
| 1072 | ext_prop_type->ct_attrs = ext_prop_attrs; |
| 1073 | ext_prop_type->ct_owner = desc->owner; |
| 1074 | |
| 1075 | config_item_init_type_name(&ext_prop->item, name, ext_prop_type); |
| 1076 | |
| 1077 | ext_prop->name = kstrdup(name, GFP_KERNEL); |
| 1078 | if (!ext_prop->name) { |
| 1079 | kfree(vlabuf); |
| 1080 | return ERR_PTR(-ENOMEM); |
| 1081 | } |
| 1082 | desc->ext_prop_len += 14; |
| 1083 | ext_prop->name_len = 2 * strlen(ext_prop->name) + 2; |
| 1084 | if (desc->opts_mutex) |
| 1085 | mutex_lock(desc->opts_mutex); |
| 1086 | desc->ext_prop_len += ext_prop->name_len; |
| 1087 | list_add_tail(&ext_prop->entry, &desc->ext_prop); |
| 1088 | ++desc->ext_prop_count; |
| 1089 | if (desc->opts_mutex) |
| 1090 | mutex_unlock(desc->opts_mutex); |
| 1091 | |
| 1092 | return &ext_prop->item; |
| 1093 | } |
| 1094 | |
| 1095 | static void ext_prop_drop(struct config_group *group, struct config_item *item) |
| 1096 | { |
| 1097 | struct usb_os_desc_ext_prop *ext_prop = to_usb_os_desc_ext_prop(item); |
| 1098 | struct usb_os_desc *desc = to_usb_os_desc(&group->cg_item); |
| 1099 | |
| 1100 | if (desc->opts_mutex) |
| 1101 | mutex_lock(desc->opts_mutex); |
| 1102 | list_del(&ext_prop->entry); |
| 1103 | --desc->ext_prop_count; |
| 1104 | kfree(ext_prop->name); |
| 1105 | desc->ext_prop_len -= (ext_prop->name_len + ext_prop->data_len + 14); |
| 1106 | if (desc->opts_mutex) |
| 1107 | mutex_unlock(desc->opts_mutex); |
| 1108 | config_item_put(item); |
| 1109 | } |
| 1110 | |
| 1111 | static struct configfs_group_operations interf_grp_ops = { |
| 1112 | .make_item = &ext_prop_make, |
| 1113 | .drop_item = &ext_prop_drop, |
| 1114 | }; |
| 1115 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 1116 | static ssize_t interf_grp_compatible_id_show(struct config_item *item, |
Andrzej Pietrasiewicz | fe00b13 | 2014-06-18 14:24:48 +0200 | [diff] [blame] | 1117 | char *page) |
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 | memcpy(page, to_usb_os_desc(item)->ext_compat_id, 8); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1120 | return 8; |
| 1121 | } |
| 1122 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 1123 | static ssize_t interf_grp_compatible_id_store(struct config_item *item, |
Andrzej Pietrasiewicz | fe00b13 | 2014-06-18 14:24:48 +0200 | [diff] [blame] | 1124 | const char *page, size_t len) |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1125 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 1126 | struct usb_os_desc *desc = to_usb_os_desc(item); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1127 | int l; |
| 1128 | |
| 1129 | l = min_t(int, 8, len); |
| 1130 | if (page[l - 1] == '\n') |
| 1131 | --l; |
| 1132 | if (desc->opts_mutex) |
| 1133 | mutex_lock(desc->opts_mutex); |
| 1134 | memcpy(desc->ext_compat_id, page, l); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1135 | |
| 1136 | if (desc->opts_mutex) |
| 1137 | mutex_unlock(desc->opts_mutex); |
| 1138 | |
| 1139 | return len; |
| 1140 | } |
| 1141 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 1142 | 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] | 1143 | char *page) |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1144 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 1145 | memcpy(page, to_usb_os_desc(item)->ext_compat_id + 8, 8); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1146 | return 8; |
| 1147 | } |
| 1148 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 1149 | 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] | 1150 | const char *page, size_t len) |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1151 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 1152 | struct usb_os_desc *desc = to_usb_os_desc(item); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1153 | int l; |
| 1154 | |
| 1155 | l = min_t(int, 8, len); |
| 1156 | if (page[l - 1] == '\n') |
| 1157 | --l; |
| 1158 | if (desc->opts_mutex) |
| 1159 | mutex_lock(desc->opts_mutex); |
| 1160 | memcpy(desc->ext_compat_id + 8, page, l); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1161 | |
| 1162 | if (desc->opts_mutex) |
| 1163 | mutex_unlock(desc->opts_mutex); |
| 1164 | |
| 1165 | return len; |
| 1166 | } |
| 1167 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 1168 | CONFIGFS_ATTR(interf_grp_, compatible_id); |
| 1169 | CONFIGFS_ATTR(interf_grp_, sub_compatible_id); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1170 | |
| 1171 | static struct configfs_attribute *interf_grp_attrs[] = { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 1172 | &interf_grp_attr_compatible_id, |
| 1173 | &interf_grp_attr_sub_compatible_id, |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1174 | NULL |
| 1175 | }; |
| 1176 | |
Andrew Gabbasov | 3c57f9d | 2017-09-30 08:54:52 -0700 | [diff] [blame] | 1177 | struct config_group *usb_os_desc_prepare_interf_dir( |
| 1178 | struct config_group *parent, |
| 1179 | int n_interf, |
| 1180 | struct usb_os_desc **desc, |
| 1181 | char **names, |
| 1182 | struct module *owner) |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1183 | { |
Christoph Hellwig | 1ae1602 | 2016-02-26 11:02:14 +0100 | [diff] [blame] | 1184 | struct config_group *os_desc_group; |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1185 | struct config_item_type *os_desc_type, *interface_type; |
| 1186 | |
| 1187 | vla_group(data_chunk); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1188 | vla_item(data_chunk, struct config_group, os_desc_group, 1); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1189 | vla_item(data_chunk, struct config_item_type, os_desc_type, 1); |
| 1190 | vla_item(data_chunk, struct config_item_type, interface_type, 1); |
| 1191 | |
| 1192 | char *vlabuf = kzalloc(vla_group_size(data_chunk), GFP_KERNEL); |
| 1193 | if (!vlabuf) |
Andrew Gabbasov | 3c57f9d | 2017-09-30 08:54:52 -0700 | [diff] [blame] | 1194 | return ERR_PTR(-ENOMEM); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1195 | |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1196 | os_desc_group = vla_ptr(vlabuf, data_chunk, os_desc_group); |
| 1197 | os_desc_type = vla_ptr(vlabuf, data_chunk, os_desc_type); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1198 | interface_type = vla_ptr(vlabuf, data_chunk, interface_type); |
| 1199 | |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1200 | os_desc_type->ct_owner = owner; |
| 1201 | 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] | 1202 | configfs_add_default_group(os_desc_group, parent); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1203 | |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 1204 | interface_type->ct_group_ops = &interf_grp_ops; |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1205 | interface_type->ct_attrs = interf_grp_attrs; |
| 1206 | interface_type->ct_owner = owner; |
| 1207 | |
| 1208 | while (n_interf--) { |
| 1209 | struct usb_os_desc *d; |
| 1210 | |
| 1211 | d = desc[n_interf]; |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 1212 | d->owner = owner; |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1213 | config_group_init_type_name(&d->group, "", interface_type); |
Andrzej Pietrasiewicz | 14574b5 | 2014-06-18 14:24:49 +0200 | [diff] [blame] | 1214 | config_item_set_name(&d->group.cg_item, "interface.%s", |
| 1215 | names[n_interf]); |
Christoph Hellwig | 1ae1602 | 2016-02-26 11:02:14 +0100 | [diff] [blame] | 1216 | configfs_add_default_group(&d->group, os_desc_group); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1217 | } |
| 1218 | |
Andrew Gabbasov | 3c57f9d | 2017-09-30 08:54:52 -0700 | [diff] [blame] | 1219 | return os_desc_group; |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1220 | } |
| 1221 | EXPORT_SYMBOL(usb_os_desc_prepare_interf_dir); |
| 1222 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1223 | static int configfs_do_nothing(struct usb_composite_dev *cdev) |
| 1224 | { |
David Rientjes | 75bfe23 | 2013-04-07 14:11:47 -0700 | [diff] [blame] | 1225 | WARN_ON(1); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1226 | return -EINVAL; |
| 1227 | } |
| 1228 | |
| 1229 | int composite_dev_prepare(struct usb_composite_driver *composite, |
| 1230 | struct usb_composite_dev *dev); |
| 1231 | |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1232 | int composite_os_desc_req_prepare(struct usb_composite_dev *cdev, |
| 1233 | struct usb_ep *ep0); |
| 1234 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1235 | static void purge_configs_funcs(struct gadget_info *gi) |
| 1236 | { |
| 1237 | struct usb_configuration *c; |
| 1238 | |
| 1239 | list_for_each_entry(c, &gi->cdev.configs, list) { |
| 1240 | struct usb_function *f, *tmp; |
| 1241 | struct config_usb_cfg *cfg; |
| 1242 | |
| 1243 | cfg = container_of(c, struct config_usb_cfg, c); |
| 1244 | |
| 1245 | list_for_each_entry_safe(f, tmp, &c->functions, list) { |
| 1246 | |
| 1247 | list_move_tail(&f->list, &cfg->func_list); |
| 1248 | if (f->unbind) { |
Romain Izard | da7b895 | 2016-08-29 12:22:29 +0300 | [diff] [blame] | 1249 | dev_dbg(&gi->cdev.gadget->dev, |
Romain Izard | a08f5db | 2016-07-26 18:21:46 +0200 | [diff] [blame] | 1250 | "unbind function '%s'/%p\n", |
| 1251 | f->name, f); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1252 | f->unbind(c, f); |
| 1253 | } |
| 1254 | } |
| 1255 | c->next_interface_id = 0; |
Krzysztof Opasiak | 903124f | 2015-03-20 15:48:56 +0100 | [diff] [blame] | 1256 | memset(c->interface, 0, sizeof(c->interface)); |
John Youn | 554eead | 2016-02-05 17:06:35 -0800 | [diff] [blame] | 1257 | c->superspeed_plus = 0; |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1258 | c->superspeed = 0; |
| 1259 | c->highspeed = 0; |
| 1260 | c->fullspeed = 0; |
| 1261 | } |
| 1262 | } |
| 1263 | |
| 1264 | static int configfs_composite_bind(struct usb_gadget *gadget, |
| 1265 | struct usb_gadget_driver *gdriver) |
| 1266 | { |
| 1267 | struct usb_composite_driver *composite = to_cdriver(gdriver); |
| 1268 | struct gadget_info *gi = container_of(composite, |
| 1269 | struct gadget_info, composite); |
| 1270 | struct usb_composite_dev *cdev = &gi->cdev; |
| 1271 | struct usb_configuration *c; |
| 1272 | struct usb_string *s; |
| 1273 | unsigned i; |
| 1274 | int ret; |
| 1275 | |
| 1276 | /* the gi->lock is hold by the caller */ |
Peter Chen | aa919ef | 2019-08-26 15:10:55 -0400 | [diff] [blame] | 1277 | gi->unbind = 0; |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1278 | cdev->gadget = gadget; |
| 1279 | set_gadget_data(gadget, cdev); |
| 1280 | ret = composite_dev_prepare(composite, cdev); |
| 1281 | if (ret) |
| 1282 | return ret; |
| 1283 | /* and now the gadget bind */ |
| 1284 | ret = -EINVAL; |
| 1285 | |
| 1286 | if (list_empty(&gi->cdev.configs)) { |
Peter Chen | 4d9f872 | 2014-05-05 07:39:34 +0800 | [diff] [blame] | 1287 | pr_err("Need at least one configuration in %s.\n", |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1288 | gi->composite.name); |
| 1289 | goto err_comp_cleanup; |
| 1290 | } |
| 1291 | |
| 1292 | |
| 1293 | list_for_each_entry(c, &gi->cdev.configs, list) { |
| 1294 | struct config_usb_cfg *cfg; |
| 1295 | |
| 1296 | cfg = container_of(c, struct config_usb_cfg, c); |
| 1297 | if (list_empty(&cfg->func_list)) { |
Peter Chen | 4d9f872 | 2014-05-05 07:39:34 +0800 | [diff] [blame] | 1298 | 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] | 1299 | c->label, c->bConfigurationValue, |
| 1300 | gi->composite.name); |
| 1301 | goto err_comp_cleanup; |
| 1302 | } |
| 1303 | } |
| 1304 | |
| 1305 | /* init all strings */ |
| 1306 | if (!list_empty(&gi->string_list)) { |
| 1307 | struct gadget_strings *gs; |
| 1308 | |
| 1309 | i = 0; |
| 1310 | list_for_each_entry(gs, &gi->string_list, list) { |
| 1311 | |
| 1312 | gi->gstrings[i] = &gs->stringtab_dev; |
| 1313 | gs->stringtab_dev.strings = gs->strings; |
| 1314 | gs->strings[USB_GADGET_MANUFACTURER_IDX].s = |
| 1315 | gs->manufacturer; |
| 1316 | gs->strings[USB_GADGET_PRODUCT_IDX].s = gs->product; |
| 1317 | gs->strings[USB_GADGET_SERIAL_IDX].s = gs->serialnumber; |
| 1318 | i++; |
| 1319 | } |
| 1320 | gi->gstrings[i] = NULL; |
| 1321 | s = usb_gstrings_attach(&gi->cdev, gi->gstrings, |
| 1322 | USB_GADGET_FIRST_AVAIL_IDX); |
Wei Yongjun | fea7707 | 2013-05-07 19:50:31 +0800 | [diff] [blame] | 1323 | if (IS_ERR(s)) { |
| 1324 | ret = PTR_ERR(s); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1325 | goto err_comp_cleanup; |
Wei Yongjun | fea7707 | 2013-05-07 19:50:31 +0800 | [diff] [blame] | 1326 | } |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1327 | |
| 1328 | gi->cdev.desc.iManufacturer = s[USB_GADGET_MANUFACTURER_IDX].id; |
| 1329 | gi->cdev.desc.iProduct = s[USB_GADGET_PRODUCT_IDX].id; |
| 1330 | gi->cdev.desc.iSerialNumber = s[USB_GADGET_SERIAL_IDX].id; |
| 1331 | } |
| 1332 | |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 1333 | if (gi->use_os_desc) { |
| 1334 | cdev->use_os_string = true; |
| 1335 | cdev->b_vendor_code = gi->b_vendor_code; |
| 1336 | memcpy(cdev->qw_sign, gi->qw_sign, OS_STRING_QW_SIGN_LEN); |
| 1337 | } |
| 1338 | |
Li Jun | 41ce84c | 2015-07-09 15:18:48 +0800 | [diff] [blame] | 1339 | if (gadget_is_otg(gadget) && !otg_desc[0]) { |
| 1340 | struct usb_descriptor_header *usb_desc; |
| 1341 | |
| 1342 | usb_desc = usb_otg_descriptor_alloc(gadget); |
| 1343 | if (!usb_desc) { |
| 1344 | ret = -ENOMEM; |
| 1345 | goto err_comp_cleanup; |
| 1346 | } |
| 1347 | usb_otg_descriptor_init(gadget, usb_desc); |
| 1348 | otg_desc[0] = usb_desc; |
| 1349 | otg_desc[1] = NULL; |
| 1350 | } |
| 1351 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1352 | /* Go through all configs, attach all functions */ |
| 1353 | list_for_each_entry(c, &gi->cdev.configs, list) { |
| 1354 | struct config_usb_cfg *cfg; |
| 1355 | struct usb_function *f; |
| 1356 | struct usb_function *tmp; |
| 1357 | struct gadget_config_name *cn; |
| 1358 | |
Li Jun | 41ce84c | 2015-07-09 15:18:48 +0800 | [diff] [blame] | 1359 | if (gadget_is_otg(gadget)) |
| 1360 | c->descriptors = otg_desc; |
| 1361 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1362 | cfg = container_of(c, struct config_usb_cfg, c); |
| 1363 | if (!list_empty(&cfg->string_list)) { |
| 1364 | i = 0; |
| 1365 | list_for_each_entry(cn, &cfg->string_list, list) { |
| 1366 | cfg->gstrings[i] = &cn->stringtab_dev; |
| 1367 | cn->stringtab_dev.strings = &cn->strings; |
| 1368 | cn->strings.s = cn->configuration; |
| 1369 | i++; |
| 1370 | } |
| 1371 | cfg->gstrings[i] = NULL; |
| 1372 | s = usb_gstrings_attach(&gi->cdev, cfg->gstrings, 1); |
Wei Yongjun | fea7707 | 2013-05-07 19:50:31 +0800 | [diff] [blame] | 1373 | if (IS_ERR(s)) { |
| 1374 | ret = PTR_ERR(s); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1375 | goto err_comp_cleanup; |
Wei Yongjun | fea7707 | 2013-05-07 19:50:31 +0800 | [diff] [blame] | 1376 | } |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1377 | c->iConfiguration = s[0].id; |
| 1378 | } |
| 1379 | |
| 1380 | list_for_each_entry_safe(f, tmp, &cfg->func_list, list) { |
| 1381 | list_del(&f->list); |
| 1382 | ret = usb_add_function(c, f); |
Andrzej Pietrasiewicz | 5a68e9b | 2013-08-08 09:43:28 +0200 | [diff] [blame] | 1383 | if (ret) { |
| 1384 | list_add(&f->list, &cfg->func_list); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1385 | goto err_purge_funcs; |
Andrzej Pietrasiewicz | 5a68e9b | 2013-08-08 09:43:28 +0200 | [diff] [blame] | 1386 | } |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1387 | } |
| 1388 | usb_ep_autoconfig_reset(cdev->gadget); |
| 1389 | } |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1390 | if (cdev->use_os_string) { |
| 1391 | ret = composite_os_desc_req_prepare(cdev, gadget->ep0); |
| 1392 | if (ret) |
| 1393 | goto err_purge_funcs; |
| 1394 | } |
| 1395 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1396 | usb_ep_autoconfig_reset(cdev->gadget); |
| 1397 | return 0; |
| 1398 | |
| 1399 | err_purge_funcs: |
| 1400 | purge_configs_funcs(gi); |
| 1401 | err_comp_cleanup: |
| 1402 | composite_dev_cleanup(cdev); |
| 1403 | return ret; |
| 1404 | } |
| 1405 | |
Badhri Jagan Sridharan | 2187738 | 2014-12-15 10:44:47 -0800 | [diff] [blame] | 1406 | #ifdef CONFIG_USB_CONFIGFS_UEVENT |
| 1407 | static void android_work(struct work_struct *data) |
| 1408 | { |
| 1409 | struct gadget_info *gi = container_of(data, struct gadget_info, work); |
| 1410 | struct usb_composite_dev *cdev = &gi->cdev; |
| 1411 | char *disconnected[2] = { "USB_STATE=DISCONNECTED", NULL }; |
| 1412 | char *connected[2] = { "USB_STATE=CONNECTED", NULL }; |
| 1413 | char *configured[2] = { "USB_STATE=CONFIGURED", NULL }; |
| 1414 | /* 0-connected 1-configured 2-disconnected*/ |
| 1415 | bool status[3] = { false, false, false }; |
| 1416 | unsigned long flags; |
| 1417 | bool uevent_sent = false; |
| 1418 | |
| 1419 | spin_lock_irqsave(&cdev->lock, flags); |
| 1420 | if (cdev->config) |
| 1421 | status[1] = true; |
| 1422 | |
| 1423 | if (gi->connected != gi->sw_connected) { |
| 1424 | if (gi->connected) |
| 1425 | status[0] = true; |
| 1426 | else |
| 1427 | status[2] = true; |
| 1428 | gi->sw_connected = gi->connected; |
| 1429 | } |
| 1430 | spin_unlock_irqrestore(&cdev->lock, flags); |
| 1431 | |
| 1432 | if (status[0]) { |
Badhri Jagan Sridharan | d6b2d77 | 2015-03-27 14:15:19 -0700 | [diff] [blame] | 1433 | kobject_uevent_env(&android_device->kobj, |
| 1434 | KOBJ_CHANGE, connected); |
Badhri Jagan Sridharan | 2187738 | 2014-12-15 10:44:47 -0800 | [diff] [blame] | 1435 | pr_info("%s: sent uevent %s\n", __func__, connected[0]); |
| 1436 | uevent_sent = true; |
| 1437 | } |
| 1438 | |
| 1439 | if (status[1]) { |
Badhri Jagan Sridharan | d6b2d77 | 2015-03-27 14:15:19 -0700 | [diff] [blame] | 1440 | kobject_uevent_env(&android_device->kobj, |
| 1441 | KOBJ_CHANGE, configured); |
Badhri Jagan Sridharan | 2187738 | 2014-12-15 10:44:47 -0800 | [diff] [blame] | 1442 | pr_info("%s: sent uevent %s\n", __func__, configured[0]); |
| 1443 | uevent_sent = true; |
| 1444 | } |
| 1445 | |
| 1446 | if (status[2]) { |
Badhri Jagan Sridharan | d6b2d77 | 2015-03-27 14:15:19 -0700 | [diff] [blame] | 1447 | kobject_uevent_env(&android_device->kobj, |
| 1448 | KOBJ_CHANGE, disconnected); |
Badhri Jagan Sridharan | 2187738 | 2014-12-15 10:44:47 -0800 | [diff] [blame] | 1449 | pr_info("%s: sent uevent %s\n", __func__, disconnected[0]); |
| 1450 | uevent_sent = true; |
| 1451 | } |
| 1452 | |
| 1453 | if (!uevent_sent) { |
| 1454 | pr_info("%s: did not send uevent (%d %d %p)\n", __func__, |
| 1455 | gi->connected, gi->sw_connected, cdev->config); |
| 1456 | } |
| 1457 | } |
| 1458 | #endif |
| 1459 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1460 | static void configfs_composite_unbind(struct usb_gadget *gadget) |
| 1461 | { |
| 1462 | struct usb_composite_dev *cdev; |
| 1463 | struct gadget_info *gi; |
Peter Chen | aa919ef | 2019-08-26 15:10:55 -0400 | [diff] [blame] | 1464 | unsigned long flags; |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1465 | |
| 1466 | /* the gi->lock is hold by the caller */ |
| 1467 | |
| 1468 | cdev = get_gadget_data(gadget); |
| 1469 | gi = container_of(cdev, struct gadget_info, cdev); |
Peter Chen | aa919ef | 2019-08-26 15:10:55 -0400 | [diff] [blame] | 1470 | spin_lock_irqsave(&gi->spinlock, flags); |
| 1471 | gi->unbind = 1; |
| 1472 | spin_unlock_irqrestore(&gi->spinlock, flags); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1473 | |
Li Jun | 41ce84c | 2015-07-09 15:18:48 +0800 | [diff] [blame] | 1474 | kfree(otg_desc[0]); |
| 1475 | otg_desc[0] = NULL; |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1476 | purge_configs_funcs(gi); |
| 1477 | composite_dev_cleanup(cdev); |
| 1478 | usb_ep_autoconfig_reset(cdev->gadget); |
Peter Chen | aa919ef | 2019-08-26 15:10:55 -0400 | [diff] [blame] | 1479 | spin_lock_irqsave(&gi->spinlock, flags); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1480 | cdev->gadget = NULL; |
| 1481 | set_gadget_data(gadget, NULL); |
Peter Chen | aa919ef | 2019-08-26 15:10:55 -0400 | [diff] [blame] | 1482 | spin_unlock_irqrestore(&gi->spinlock, flags); |
| 1483 | } |
| 1484 | |
| 1485 | static int configfs_composite_setup(struct usb_gadget *gadget, |
| 1486 | const struct usb_ctrlrequest *ctrl) |
| 1487 | { |
| 1488 | struct usb_composite_dev *cdev; |
| 1489 | struct gadget_info *gi; |
| 1490 | unsigned long flags; |
| 1491 | int ret; |
| 1492 | |
| 1493 | cdev = get_gadget_data(gadget); |
| 1494 | if (!cdev) |
| 1495 | return 0; |
| 1496 | |
| 1497 | gi = container_of(cdev, struct gadget_info, cdev); |
| 1498 | spin_lock_irqsave(&gi->spinlock, flags); |
| 1499 | cdev = get_gadget_data(gadget); |
| 1500 | if (!cdev || gi->unbind) { |
| 1501 | spin_unlock_irqrestore(&gi->spinlock, flags); |
| 1502 | return 0; |
| 1503 | } |
| 1504 | |
| 1505 | ret = composite_setup(gadget, ctrl); |
| 1506 | spin_unlock_irqrestore(&gi->spinlock, flags); |
| 1507 | return ret; |
| 1508 | } |
| 1509 | |
| 1510 | static void configfs_composite_disconnect(struct usb_gadget *gadget) |
| 1511 | { |
| 1512 | struct usb_composite_dev *cdev; |
| 1513 | struct gadget_info *gi; |
| 1514 | unsigned long flags; |
| 1515 | |
| 1516 | cdev = get_gadget_data(gadget); |
| 1517 | if (!cdev) |
| 1518 | return; |
| 1519 | |
| 1520 | gi = container_of(cdev, struct gadget_info, cdev); |
| 1521 | spin_lock_irqsave(&gi->spinlock, flags); |
| 1522 | cdev = get_gadget_data(gadget); |
| 1523 | if (!cdev || gi->unbind) { |
| 1524 | spin_unlock_irqrestore(&gi->spinlock, flags); |
| 1525 | return; |
| 1526 | } |
| 1527 | |
| 1528 | composite_disconnect(gadget); |
| 1529 | spin_unlock_irqrestore(&gi->spinlock, flags); |
| 1530 | } |
| 1531 | |
| 1532 | static void configfs_composite_suspend(struct usb_gadget *gadget) |
| 1533 | { |
| 1534 | struct usb_composite_dev *cdev; |
| 1535 | struct gadget_info *gi; |
| 1536 | unsigned long flags; |
| 1537 | |
| 1538 | cdev = get_gadget_data(gadget); |
| 1539 | if (!cdev) |
| 1540 | return; |
| 1541 | |
| 1542 | gi = container_of(cdev, struct gadget_info, cdev); |
| 1543 | spin_lock_irqsave(&gi->spinlock, flags); |
| 1544 | cdev = get_gadget_data(gadget); |
| 1545 | if (!cdev || gi->unbind) { |
| 1546 | spin_unlock_irqrestore(&gi->spinlock, flags); |
| 1547 | return; |
| 1548 | } |
| 1549 | |
| 1550 | composite_suspend(gadget); |
| 1551 | spin_unlock_irqrestore(&gi->spinlock, flags); |
| 1552 | } |
| 1553 | |
| 1554 | static void configfs_composite_resume(struct usb_gadget *gadget) |
| 1555 | { |
| 1556 | struct usb_composite_dev *cdev; |
| 1557 | struct gadget_info *gi; |
| 1558 | unsigned long flags; |
| 1559 | |
| 1560 | cdev = get_gadget_data(gadget); |
| 1561 | if (!cdev) |
| 1562 | return; |
| 1563 | |
| 1564 | gi = container_of(cdev, struct gadget_info, cdev); |
| 1565 | spin_lock_irqsave(&gi->spinlock, flags); |
| 1566 | cdev = get_gadget_data(gadget); |
| 1567 | if (!cdev || gi->unbind) { |
| 1568 | spin_unlock_irqrestore(&gi->spinlock, flags); |
| 1569 | return; |
| 1570 | } |
| 1571 | |
| 1572 | composite_resume(gadget); |
| 1573 | spin_unlock_irqrestore(&gi->spinlock, flags); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1574 | } |
| 1575 | |
Badhri Jagan Sridharan | 2187738 | 2014-12-15 10:44:47 -0800 | [diff] [blame] | 1576 | #ifdef CONFIG_USB_CONFIGFS_UEVENT |
| 1577 | static int android_setup(struct usb_gadget *gadget, |
| 1578 | const struct usb_ctrlrequest *c) |
| 1579 | { |
| 1580 | struct usb_composite_dev *cdev = get_gadget_data(gadget); |
| 1581 | unsigned long flags; |
| 1582 | struct gadget_info *gi = container_of(cdev, struct gadget_info, cdev); |
| 1583 | int value = -EOPNOTSUPP; |
| 1584 | struct usb_function_instance *fi; |
| 1585 | |
| 1586 | spin_lock_irqsave(&cdev->lock, flags); |
| 1587 | if (!gi->connected) { |
| 1588 | gi->connected = 1; |
| 1589 | schedule_work(&gi->work); |
| 1590 | } |
| 1591 | spin_unlock_irqrestore(&cdev->lock, flags); |
| 1592 | list_for_each_entry(fi, &gi->available_func, cfs_list) { |
| 1593 | if (fi != NULL && fi->f != NULL && fi->f->setup != NULL) { |
| 1594 | value = fi->f->setup(fi->f, c); |
| 1595 | if (value >= 0) |
| 1596 | break; |
| 1597 | } |
| 1598 | } |
| 1599 | |
| 1600 | #ifdef CONFIG_USB_CONFIGFS_F_ACC |
| 1601 | if (value < 0) |
| 1602 | value = acc_ctrlrequest(cdev, c); |
| 1603 | #endif |
| 1604 | |
| 1605 | if (value < 0) |
| 1606 | value = composite_setup(gadget, c); |
| 1607 | |
| 1608 | spin_lock_irqsave(&cdev->lock, flags); |
| 1609 | if (c->bRequest == USB_REQ_SET_CONFIGURATION && |
| 1610 | cdev->config) { |
| 1611 | schedule_work(&gi->work); |
| 1612 | } |
| 1613 | spin_unlock_irqrestore(&cdev->lock, flags); |
| 1614 | |
| 1615 | return value; |
| 1616 | } |
| 1617 | |
| 1618 | static void android_disconnect(struct usb_gadget *gadget) |
| 1619 | { |
| 1620 | struct usb_composite_dev *cdev = get_gadget_data(gadget); |
| 1621 | struct gadget_info *gi = container_of(cdev, struct gadget_info, cdev); |
| 1622 | |
Danilo Krummrich | 6e05535 | 2017-08-14 12:45:38 +0200 | [diff] [blame] | 1623 | /* FIXME: There's a race between usb_gadget_udc_stop() which is likely |
| 1624 | * to set the gadget driver to NULL in the udc driver and this drivers |
| 1625 | * gadget disconnect fn which likely checks for the gadget driver to |
| 1626 | * be a null ptr. It happens that unbind (doing set_gadget_data(NULL)) |
| 1627 | * is called before the gadget driver is set to NULL and the udc driver |
| 1628 | * calls disconnect fn which results in cdev being a null ptr. |
| 1629 | */ |
| 1630 | if (cdev == NULL) { |
| 1631 | WARN(1, "%s: gadget driver already disconnected\n", __func__); |
| 1632 | return; |
| 1633 | } |
| 1634 | |
Badhri Jagan Sridharan | 2187738 | 2014-12-15 10:44:47 -0800 | [diff] [blame] | 1635 | /* accessory HID support can be active while the |
| 1636 | accessory function is not actually enabled, |
| 1637 | so we need to inform it when we are disconnected. |
| 1638 | */ |
| 1639 | |
| 1640 | #ifdef CONFIG_USB_CONFIGFS_F_ACC |
| 1641 | acc_disconnect(); |
| 1642 | #endif |
| 1643 | gi->connected = 0; |
| 1644 | schedule_work(&gi->work); |
| 1645 | composite_disconnect(gadget); |
| 1646 | } |
| 1647 | #endif |
| 1648 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1649 | static const struct usb_gadget_driver configfs_driver_template = { |
| 1650 | .bind = configfs_composite_bind, |
| 1651 | .unbind = configfs_composite_unbind, |
Badhri Jagan Sridharan | 2187738 | 2014-12-15 10:44:47 -0800 | [diff] [blame] | 1652 | #ifdef CONFIG_USB_CONFIGFS_UEVENT |
| 1653 | .setup = android_setup, |
Amit Pundir | 9214c89 | 2015-10-06 20:53:27 +0530 | [diff] [blame] | 1654 | .reset = android_disconnect, |
Badhri Jagan Sridharan | 2187738 | 2014-12-15 10:44:47 -0800 | [diff] [blame] | 1655 | .disconnect = android_disconnect, |
| 1656 | #else |
Peter Chen | aa919ef | 2019-08-26 15:10:55 -0400 | [diff] [blame] | 1657 | .setup = configfs_composite_setup, |
| 1658 | .reset = configfs_composite_disconnect, |
| 1659 | .disconnect = configfs_composite_disconnect, |
Badhri Jagan Sridharan | 2187738 | 2014-12-15 10:44:47 -0800 | [diff] [blame] | 1660 | #endif |
Peter Chen | aa919ef | 2019-08-26 15:10:55 -0400 | [diff] [blame] | 1661 | .suspend = configfs_composite_suspend, |
| 1662 | .resume = configfs_composite_resume, |
Andrzej Pietrasiewicz | 3a57187 | 2014-10-08 12:03:36 +0200 | [diff] [blame] | 1663 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1664 | .max_speed = USB_SPEED_SUPER, |
| 1665 | .driver = { |
| 1666 | .owner = THIS_MODULE, |
| 1667 | .name = "configfs-gadget", |
| 1668 | }, |
Krzysztof Opasiak | f1bddbb | 2016-05-05 10:46:05 +0200 | [diff] [blame] | 1669 | .match_existing_only = 1, |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1670 | }; |
| 1671 | |
Badhri Jagan Sridharan | 9150ea1 | 2015-07-14 15:46:11 -0700 | [diff] [blame] | 1672 | #ifdef CONFIG_USB_CONFIGFS_UEVENT |
| 1673 | static ssize_t state_show(struct device *pdev, struct device_attribute *attr, |
| 1674 | char *buf) |
| 1675 | { |
| 1676 | struct gadget_info *dev = dev_get_drvdata(pdev); |
| 1677 | struct usb_composite_dev *cdev; |
| 1678 | char *state = "DISCONNECTED"; |
| 1679 | unsigned long flags; |
| 1680 | |
| 1681 | if (!dev) |
| 1682 | goto out; |
| 1683 | |
| 1684 | cdev = &dev->cdev; |
| 1685 | |
| 1686 | if (!cdev) |
| 1687 | goto out; |
| 1688 | |
| 1689 | spin_lock_irqsave(&cdev->lock, flags); |
| 1690 | if (cdev->config) |
| 1691 | state = "CONFIGURED"; |
| 1692 | else if (dev->connected) |
| 1693 | state = "CONNECTED"; |
| 1694 | spin_unlock_irqrestore(&cdev->lock, flags); |
| 1695 | out: |
| 1696 | return sprintf(buf, "%s\n", state); |
| 1697 | } |
| 1698 | |
| 1699 | static DEVICE_ATTR(state, S_IRUGO, state_show, NULL); |
| 1700 | |
| 1701 | static struct device_attribute *android_usb_attributes[] = { |
| 1702 | &dev_attr_state, |
| 1703 | NULL |
| 1704 | }; |
Badhri Jagan Sridharan | 560f013 | 2015-08-09 15:12:50 -0700 | [diff] [blame] | 1705 | |
| 1706 | static int android_device_create(struct gadget_info *gi) |
| 1707 | { |
| 1708 | struct device_attribute **attrs; |
| 1709 | struct device_attribute *attr; |
| 1710 | |
| 1711 | INIT_WORK(&gi->work, android_work); |
| 1712 | android_device = device_create(android_class, NULL, |
| 1713 | MKDEV(0, 0), NULL, "android0"); |
| 1714 | if (IS_ERR(android_device)) |
| 1715 | return PTR_ERR(android_device); |
| 1716 | |
| 1717 | dev_set_drvdata(android_device, gi); |
| 1718 | |
| 1719 | attrs = android_usb_attributes; |
| 1720 | while ((attr = *attrs++)) { |
| 1721 | int err; |
| 1722 | |
| 1723 | err = device_create_file(android_device, attr); |
| 1724 | if (err) { |
| 1725 | device_destroy(android_device->class, |
| 1726 | android_device->devt); |
| 1727 | return err; |
| 1728 | } |
| 1729 | } |
| 1730 | |
| 1731 | return 0; |
| 1732 | } |
| 1733 | |
| 1734 | static void android_device_destroy(void) |
| 1735 | { |
| 1736 | struct device_attribute **attrs; |
| 1737 | struct device_attribute *attr; |
| 1738 | |
| 1739 | attrs = android_usb_attributes; |
| 1740 | while ((attr = *attrs++)) |
| 1741 | device_remove_file(android_device, attr); |
| 1742 | device_destroy(android_device->class, android_device->devt); |
| 1743 | } |
| 1744 | #else |
| 1745 | static inline int android_device_create(struct gadget_info *gi) |
| 1746 | { |
| 1747 | return 0; |
| 1748 | } |
| 1749 | |
| 1750 | static inline void android_device_destroy(void) |
| 1751 | { |
| 1752 | } |
Badhri Jagan Sridharan | 9150ea1 | 2015-07-14 15:46:11 -0700 | [diff] [blame] | 1753 | #endif |
| 1754 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1755 | static struct config_group *gadgets_make( |
| 1756 | struct config_group *group, |
| 1757 | const char *name) |
| 1758 | { |
| 1759 | struct gadget_info *gi; |
| 1760 | |
| 1761 | gi = kzalloc(sizeof(*gi), GFP_KERNEL); |
| 1762 | if (!gi) |
| 1763 | return ERR_PTR(-ENOMEM); |
| 1764 | |
Christoph Hellwig | 1ae1602 | 2016-02-26 11:02:14 +0100 | [diff] [blame] | 1765 | config_group_init_type_name(&gi->group, name, &gadget_root_type); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1766 | |
| 1767 | config_group_init_type_name(&gi->functions_group, "functions", |
| 1768 | &functions_type); |
Christoph Hellwig | 1ae1602 | 2016-02-26 11:02:14 +0100 | [diff] [blame] | 1769 | configfs_add_default_group(&gi->functions_group, &gi->group); |
| 1770 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1771 | config_group_init_type_name(&gi->configs_group, "configs", |
| 1772 | &config_desc_type); |
Christoph Hellwig | 1ae1602 | 2016-02-26 11:02:14 +0100 | [diff] [blame] | 1773 | configfs_add_default_group(&gi->configs_group, &gi->group); |
| 1774 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1775 | config_group_init_type_name(&gi->strings_group, "strings", |
| 1776 | &gadget_strings_strings_type); |
Christoph Hellwig | 1ae1602 | 2016-02-26 11:02:14 +0100 | [diff] [blame] | 1777 | configfs_add_default_group(&gi->strings_group, &gi->group); |
| 1778 | |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 1779 | config_group_init_type_name(&gi->os_desc_group, "os_desc", |
| 1780 | &os_desc_type); |
Christoph Hellwig | 1ae1602 | 2016-02-26 11:02:14 +0100 | [diff] [blame] | 1781 | configfs_add_default_group(&gi->os_desc_group, &gi->group); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1782 | |
| 1783 | gi->composite.bind = configfs_do_nothing; |
| 1784 | gi->composite.unbind = configfs_do_nothing; |
| 1785 | gi->composite.suspend = NULL; |
| 1786 | gi->composite.resume = NULL; |
| 1787 | gi->composite.max_speed = USB_SPEED_SUPER; |
| 1788 | |
Wei Yongjun | be17a73 | 2019-10-30 03:40:46 +0000 | [diff] [blame] | 1789 | spin_lock_init(&gi->spinlock); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1790 | mutex_init(&gi->lock); |
| 1791 | INIT_LIST_HEAD(&gi->string_list); |
| 1792 | INIT_LIST_HEAD(&gi->available_func); |
| 1793 | |
| 1794 | composite_init_dev(&gi->cdev); |
| 1795 | gi->cdev.desc.bLength = USB_DT_DEVICE_SIZE; |
| 1796 | gi->cdev.desc.bDescriptorType = USB_DT_DEVICE; |
| 1797 | gi->cdev.desc.bcdDevice = cpu_to_le16(get_default_bcdDevice()); |
| 1798 | |
| 1799 | gi->composite.gadget_driver = configfs_driver_template; |
| 1800 | |
| 1801 | gi->composite.gadget_driver.function = kstrdup(name, GFP_KERNEL); |
| 1802 | gi->composite.name = gi->composite.gadget_driver.function; |
| 1803 | |
Badhri Jagan Sridharan | 560f013 | 2015-08-09 15:12:50 -0700 | [diff] [blame] | 1804 | if (!gi->composite.gadget_driver.function) |
Badhri Jagan Sridharan | d6b2d77 | 2015-03-27 14:15:19 -0700 | [diff] [blame] | 1805 | goto err; |
Badhri Jagan Sridharan | 9150ea1 | 2015-07-14 15:46:11 -0700 | [diff] [blame] | 1806 | |
Badhri Jagan Sridharan | 560f013 | 2015-08-09 15:12:50 -0700 | [diff] [blame] | 1807 | if (android_device_create(gi) < 0) |
| 1808 | goto err; |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1809 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1810 | return &gi->group; |
Badhri Jagan Sridharan | 9150ea1 | 2015-07-14 15:46:11 -0700 | [diff] [blame] | 1811 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1812 | err: |
| 1813 | kfree(gi); |
| 1814 | return ERR_PTR(-ENOMEM); |
| 1815 | } |
| 1816 | |
| 1817 | static void gadgets_drop(struct config_group *group, struct config_item *item) |
| 1818 | { |
| 1819 | config_item_put(item); |
Badhri Jagan Sridharan | 560f013 | 2015-08-09 15:12:50 -0700 | [diff] [blame] | 1820 | android_device_destroy(); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1821 | } |
| 1822 | |
| 1823 | static struct configfs_group_operations gadgets_ops = { |
| 1824 | .make_group = &gadgets_make, |
| 1825 | .drop_item = &gadgets_drop, |
| 1826 | }; |
| 1827 | |
| 1828 | static struct config_item_type gadgets_type = { |
| 1829 | .ct_group_ops = &gadgets_ops, |
| 1830 | .ct_owner = THIS_MODULE, |
| 1831 | }; |
| 1832 | |
| 1833 | static struct configfs_subsystem gadget_subsys = { |
| 1834 | .su_group = { |
| 1835 | .cg_item = { |
| 1836 | .ci_namebuf = "usb_gadget", |
| 1837 | .ci_type = &gadgets_type, |
| 1838 | }, |
| 1839 | }, |
| 1840 | .su_mutex = __MUTEX_INITIALIZER(gadget_subsys.su_mutex), |
| 1841 | }; |
| 1842 | |
Andrzej Pietrasiewicz | 092a4bd | 2013-09-26 14:38:15 +0200 | [diff] [blame] | 1843 | void unregister_gadget_item(struct config_item *item) |
| 1844 | { |
| 1845 | struct gadget_info *gi = to_gadget_info(item); |
| 1846 | |
Winter Wang | cee51c3 | 2016-07-27 10:03:19 +0800 | [diff] [blame] | 1847 | mutex_lock(&gi->lock); |
Andrzej Pietrasiewicz | 092a4bd | 2013-09-26 14:38:15 +0200 | [diff] [blame] | 1848 | unregister_gadget(gi); |
Winter Wang | cee51c3 | 2016-07-27 10:03:19 +0800 | [diff] [blame] | 1849 | mutex_unlock(&gi->lock); |
Andrzej Pietrasiewicz | 092a4bd | 2013-09-26 14:38:15 +0200 | [diff] [blame] | 1850 | } |
Felipe Balbi | 0700faa | 2014-04-01 13:19:32 -0500 | [diff] [blame] | 1851 | EXPORT_SYMBOL_GPL(unregister_gadget_item); |
Andrzej Pietrasiewicz | 092a4bd | 2013-09-26 14:38:15 +0200 | [diff] [blame] | 1852 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1853 | static int __init gadget_cfs_init(void) |
| 1854 | { |
| 1855 | int ret; |
| 1856 | |
| 1857 | config_group_init(&gadget_subsys.su_group); |
| 1858 | |
| 1859 | ret = configfs_register_subsystem(&gadget_subsys); |
Badhri Jagan Sridharan | 2187738 | 2014-12-15 10:44:47 -0800 | [diff] [blame] | 1860 | |
| 1861 | #ifdef CONFIG_USB_CONFIGFS_UEVENT |
| 1862 | android_class = class_create(THIS_MODULE, "android_usb"); |
| 1863 | if (IS_ERR(android_class)) |
| 1864 | return PTR_ERR(android_class); |
| 1865 | #endif |
| 1866 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1867 | return ret; |
| 1868 | } |
| 1869 | module_init(gadget_cfs_init); |
| 1870 | |
| 1871 | static void __exit gadget_cfs_exit(void) |
| 1872 | { |
| 1873 | configfs_unregister_subsystem(&gadget_subsys); |
Badhri Jagan Sridharan | d6b2d77 | 2015-03-27 14:15:19 -0700 | [diff] [blame] | 1874 | #ifdef CONFIG_USB_CONFIGFS_UEVENT |
| 1875 | if (!IS_ERR(android_class)) |
| 1876 | class_destroy(android_class); |
| 1877 | #endif |
| 1878 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1879 | } |
| 1880 | module_exit(gadget_cfs_exit); |