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> |
| 16 | #include "u_fs.h" |
| 17 | |
| 18 | #ifdef CONFIG_USB_CONFIGFS_F_ACC |
| 19 | extern int acc_ctrlrequest(struct usb_composite_dev *cdev, |
| 20 | const struct usb_ctrlrequest *ctrl); |
| 21 | void acc_disconnect(void); |
| 22 | #endif |
| 23 | static struct class *android_class; |
| 24 | #endif |
| 25 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 26 | int check_user_usb_string(const char *name, |
| 27 | struct usb_gadget_strings *stringtab_dev) |
| 28 | { |
| 29 | unsigned primary_lang; |
| 30 | unsigned sub_lang; |
| 31 | u16 num; |
| 32 | int ret; |
| 33 | |
| 34 | ret = kstrtou16(name, 0, &num); |
| 35 | if (ret) |
| 36 | return ret; |
| 37 | |
| 38 | primary_lang = num & 0x3ff; |
| 39 | sub_lang = num >> 10; |
| 40 | |
| 41 | /* simple sanity check for valid langid */ |
| 42 | switch (primary_lang) { |
| 43 | case 0: |
| 44 | case 0x62 ... 0xfe: |
| 45 | case 0x100 ... 0x3ff: |
| 46 | return -EINVAL; |
| 47 | } |
| 48 | if (!sub_lang) |
| 49 | return -EINVAL; |
| 50 | |
| 51 | stringtab_dev->language = num; |
| 52 | return 0; |
| 53 | } |
| 54 | |
| 55 | #define MAX_NAME_LEN 40 |
| 56 | #define MAX_USB_STRING_LANGS 2 |
| 57 | |
Li Jun | 41ce84c | 2015-07-09 15:18:48 +0800 | [diff] [blame] | 58 | static const struct usb_descriptor_header *otg_desc[2]; |
| 59 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 60 | struct gadget_info { |
| 61 | struct config_group group; |
| 62 | struct config_group functions_group; |
| 63 | struct config_group configs_group; |
| 64 | struct config_group strings_group; |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 65 | struct config_group os_desc_group; |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 66 | |
| 67 | struct mutex lock; |
| 68 | struct usb_gadget_strings *gstrings[MAX_USB_STRING_LANGS + 1]; |
| 69 | struct list_head string_list; |
| 70 | struct list_head available_func; |
| 71 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 72 | struct usb_composite_driver composite; |
| 73 | struct usb_composite_dev cdev; |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 74 | bool use_os_desc; |
| 75 | char b_vendor_code; |
| 76 | char qw_sign[OS_STRING_QW_SIGN_LEN]; |
Badhri Jagan Sridharan | 2187738 | 2014-12-15 10:44:47 -0800 | [diff] [blame^] | 77 | #ifdef CONFIG_USB_CONFIGFS_UEVENT |
| 78 | bool connected; |
| 79 | bool sw_connected; |
| 80 | struct work_struct work; |
| 81 | struct device *dev; |
| 82 | #endif |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 83 | }; |
| 84 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 85 | static inline struct gadget_info *to_gadget_info(struct config_item *item) |
| 86 | { |
| 87 | return container_of(to_config_group(item), struct gadget_info, group); |
| 88 | } |
| 89 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 90 | struct config_usb_cfg { |
| 91 | struct config_group group; |
| 92 | struct config_group strings_group; |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 93 | struct list_head string_list; |
| 94 | struct usb_configuration c; |
| 95 | struct list_head func_list; |
| 96 | struct usb_gadget_strings *gstrings[MAX_USB_STRING_LANGS + 1]; |
| 97 | }; |
| 98 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 99 | static inline struct config_usb_cfg *to_config_usb_cfg(struct config_item *item) |
| 100 | { |
| 101 | return container_of(to_config_group(item), struct config_usb_cfg, |
| 102 | group); |
| 103 | } |
| 104 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 105 | struct gadget_strings { |
| 106 | struct usb_gadget_strings stringtab_dev; |
| 107 | struct usb_string strings[USB_GADGET_FIRST_AVAIL_IDX]; |
| 108 | char *manufacturer; |
| 109 | char *product; |
| 110 | char *serialnumber; |
| 111 | |
| 112 | struct config_group group; |
| 113 | struct list_head list; |
| 114 | }; |
| 115 | |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 116 | struct os_desc { |
| 117 | struct config_group group; |
| 118 | }; |
| 119 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 120 | struct gadget_config_name { |
| 121 | struct usb_gadget_strings stringtab_dev; |
| 122 | struct usb_string strings; |
| 123 | char *configuration; |
| 124 | |
| 125 | struct config_group group; |
| 126 | struct list_head list; |
| 127 | }; |
| 128 | |
| 129 | static int usb_string_copy(const char *s, char **s_copy) |
| 130 | { |
| 131 | int ret; |
| 132 | char *str; |
| 133 | char *copy = *s_copy; |
| 134 | ret = strlen(s); |
| 135 | if (ret > 126) |
| 136 | return -EOVERFLOW; |
| 137 | |
| 138 | str = kstrdup(s, GFP_KERNEL); |
| 139 | if (!str) |
| 140 | return -ENOMEM; |
| 141 | if (str[ret - 1] == '\n') |
| 142 | str[ret - 1] = '\0'; |
| 143 | kfree(copy); |
| 144 | *s_copy = str; |
| 145 | return 0; |
| 146 | } |
| 147 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 148 | #define GI_DEVICE_DESC_SIMPLE_R_u8(__name) \ |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 149 | 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] | 150 | char *page) \ |
| 151 | { \ |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 152 | return sprintf(page, "0x%02x\n", \ |
| 153 | to_gadget_info(item)->cdev.desc.__name); \ |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 154 | } |
| 155 | |
| 156 | #define GI_DEVICE_DESC_SIMPLE_R_u16(__name) \ |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 157 | 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] | 158 | char *page) \ |
| 159 | { \ |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 160 | return sprintf(page, "0x%04x\n", \ |
| 161 | le16_to_cpup(&to_gadget_info(item)->cdev.desc.__name)); \ |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 162 | } |
| 163 | |
| 164 | |
| 165 | #define GI_DEVICE_DESC_SIMPLE_W_u8(_name) \ |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 166 | 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] | 167 | const char *page, size_t len) \ |
| 168 | { \ |
| 169 | u8 val; \ |
| 170 | int ret; \ |
| 171 | ret = kstrtou8(page, 0, &val); \ |
| 172 | if (ret) \ |
| 173 | return ret; \ |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 174 | to_gadget_info(item)->cdev.desc._name = val; \ |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 175 | return len; \ |
| 176 | } |
| 177 | |
| 178 | #define GI_DEVICE_DESC_SIMPLE_W_u16(_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 | u16 val; \ |
| 183 | int ret; \ |
| 184 | ret = kstrtou16(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 = cpu_to_le16p(&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_RW(_name, _type) \ |
| 192 | GI_DEVICE_DESC_SIMPLE_R_##_type(_name) \ |
| 193 | GI_DEVICE_DESC_SIMPLE_W_##_type(_name) |
| 194 | |
| 195 | GI_DEVICE_DESC_SIMPLE_R_u16(bcdUSB); |
| 196 | GI_DEVICE_DESC_SIMPLE_RW(bDeviceClass, u8); |
| 197 | GI_DEVICE_DESC_SIMPLE_RW(bDeviceSubClass, u8); |
| 198 | GI_DEVICE_DESC_SIMPLE_RW(bDeviceProtocol, u8); |
| 199 | GI_DEVICE_DESC_SIMPLE_RW(bMaxPacketSize0, u8); |
| 200 | GI_DEVICE_DESC_SIMPLE_RW(idVendor, u16); |
| 201 | GI_DEVICE_DESC_SIMPLE_RW(idProduct, u16); |
| 202 | GI_DEVICE_DESC_SIMPLE_R_u16(bcdDevice); |
| 203 | |
| 204 | static ssize_t is_valid_bcd(u16 bcd_val) |
| 205 | { |
| 206 | if ((bcd_val & 0xf) > 9) |
| 207 | return -EINVAL; |
| 208 | if (((bcd_val >> 4) & 0xf) > 9) |
| 209 | return -EINVAL; |
| 210 | if (((bcd_val >> 8) & 0xf) > 9) |
| 211 | return -EINVAL; |
| 212 | if (((bcd_val >> 12) & 0xf) > 9) |
| 213 | return -EINVAL; |
| 214 | return 0; |
| 215 | } |
| 216 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 217 | 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] | 218 | const char *page, size_t len) |
| 219 | { |
| 220 | u16 bcdDevice; |
| 221 | int ret; |
| 222 | |
| 223 | ret = kstrtou16(page, 0, &bcdDevice); |
| 224 | if (ret) |
| 225 | return ret; |
| 226 | ret = is_valid_bcd(bcdDevice); |
| 227 | if (ret) |
| 228 | return ret; |
| 229 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 230 | to_gadget_info(item)->cdev.desc.bcdDevice = cpu_to_le16(bcdDevice); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 231 | return len; |
| 232 | } |
| 233 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 234 | 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] | 235 | const char *page, size_t len) |
| 236 | { |
| 237 | u16 bcdUSB; |
| 238 | int ret; |
| 239 | |
| 240 | ret = kstrtou16(page, 0, &bcdUSB); |
| 241 | if (ret) |
| 242 | return ret; |
| 243 | ret = is_valid_bcd(bcdUSB); |
| 244 | if (ret) |
| 245 | return ret; |
| 246 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 247 | to_gadget_info(item)->cdev.desc.bcdUSB = cpu_to_le16(bcdUSB); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 248 | return len; |
| 249 | } |
| 250 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 251 | 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] | 252 | { |
Ruslan Bilovol | afdaadc | 2015-11-23 09:56:36 +0100 | [diff] [blame] | 253 | char *udc_name = to_gadget_info(item)->composite.gadget_driver.udc_name; |
| 254 | |
| 255 | return sprintf(page, "%s\n", udc_name ?: ""); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 256 | } |
| 257 | |
| 258 | static int unregister_gadget(struct gadget_info *gi) |
| 259 | { |
| 260 | int ret; |
| 261 | |
Ruslan Bilovol | afdaadc | 2015-11-23 09:56:36 +0100 | [diff] [blame] | 262 | if (!gi->composite.gadget_driver.udc_name) |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 263 | return -ENODEV; |
| 264 | |
| 265 | ret = usb_gadget_unregister_driver(&gi->composite.gadget_driver); |
| 266 | if (ret) |
| 267 | return ret; |
Ruslan Bilovol | afdaadc | 2015-11-23 09:56:36 +0100 | [diff] [blame] | 268 | kfree(gi->composite.gadget_driver.udc_name); |
| 269 | gi->composite.gadget_driver.udc_name = NULL; |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 270 | return 0; |
| 271 | } |
| 272 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 273 | 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] | 274 | const char *page, size_t len) |
| 275 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 276 | struct gadget_info *gi = to_gadget_info(item); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 277 | char *name; |
| 278 | int ret; |
| 279 | |
| 280 | name = kstrdup(page, GFP_KERNEL); |
| 281 | if (!name) |
| 282 | return -ENOMEM; |
| 283 | if (name[len - 1] == '\n') |
| 284 | name[len - 1] = '\0'; |
| 285 | |
| 286 | mutex_lock(&gi->lock); |
| 287 | |
Badhri Jagan Sridharan | 2187738 | 2014-12-15 10:44:47 -0800 | [diff] [blame^] | 288 | if (!strlen(name) || strcmp(name, "none") == 0) { |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 289 | ret = unregister_gadget(gi); |
| 290 | if (ret) |
| 291 | goto err; |
| 292 | } else { |
Ruslan Bilovol | afdaadc | 2015-11-23 09:56:36 +0100 | [diff] [blame] | 293 | if (gi->composite.gadget_driver.udc_name) { |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 294 | ret = -EBUSY; |
| 295 | goto err; |
| 296 | } |
Ruslan Bilovol | afdaadc | 2015-11-23 09:56:36 +0100 | [diff] [blame] | 297 | gi->composite.gadget_driver.udc_name = name; |
| 298 | ret = usb_gadget_probe_driver(&gi->composite.gadget_driver); |
| 299 | if (ret) { |
| 300 | gi->composite.gadget_driver.udc_name = NULL; |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 301 | goto err; |
Ruslan Bilovol | afdaadc | 2015-11-23 09:56:36 +0100 | [diff] [blame] | 302 | } |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 303 | } |
| 304 | mutex_unlock(&gi->lock); |
| 305 | return len; |
| 306 | err: |
| 307 | kfree(name); |
| 308 | mutex_unlock(&gi->lock); |
| 309 | return ret; |
| 310 | } |
| 311 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 312 | CONFIGFS_ATTR(gadget_dev_desc_, bDeviceClass); |
| 313 | CONFIGFS_ATTR(gadget_dev_desc_, bDeviceSubClass); |
| 314 | CONFIGFS_ATTR(gadget_dev_desc_, bDeviceProtocol); |
| 315 | CONFIGFS_ATTR(gadget_dev_desc_, bMaxPacketSize0); |
| 316 | CONFIGFS_ATTR(gadget_dev_desc_, idVendor); |
| 317 | CONFIGFS_ATTR(gadget_dev_desc_, idProduct); |
| 318 | CONFIGFS_ATTR(gadget_dev_desc_, bcdDevice); |
| 319 | CONFIGFS_ATTR(gadget_dev_desc_, bcdUSB); |
| 320 | CONFIGFS_ATTR(gadget_dev_desc_, UDC); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 321 | |
| 322 | static struct configfs_attribute *gadget_root_attrs[] = { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 323 | &gadget_dev_desc_attr_bDeviceClass, |
| 324 | &gadget_dev_desc_attr_bDeviceSubClass, |
| 325 | &gadget_dev_desc_attr_bDeviceProtocol, |
| 326 | &gadget_dev_desc_attr_bMaxPacketSize0, |
| 327 | &gadget_dev_desc_attr_idVendor, |
| 328 | &gadget_dev_desc_attr_idProduct, |
| 329 | &gadget_dev_desc_attr_bcdDevice, |
| 330 | &gadget_dev_desc_attr_bcdUSB, |
| 331 | &gadget_dev_desc_attr_UDC, |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 332 | NULL, |
| 333 | }; |
| 334 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 335 | static inline struct gadget_strings *to_gadget_strings(struct config_item *item) |
| 336 | { |
| 337 | return container_of(to_config_group(item), struct gadget_strings, |
| 338 | group); |
| 339 | } |
| 340 | |
| 341 | static inline struct gadget_config_name *to_gadget_config_name( |
| 342 | struct config_item *item) |
| 343 | { |
| 344 | return container_of(to_config_group(item), struct gadget_config_name, |
| 345 | group); |
| 346 | } |
| 347 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 348 | static inline struct usb_function_instance *to_usb_function_instance( |
| 349 | struct config_item *item) |
| 350 | { |
| 351 | return container_of(to_config_group(item), |
| 352 | struct usb_function_instance, group); |
| 353 | } |
| 354 | |
| 355 | static void gadget_info_attr_release(struct config_item *item) |
| 356 | { |
| 357 | struct gadget_info *gi = to_gadget_info(item); |
| 358 | |
| 359 | WARN_ON(!list_empty(&gi->cdev.configs)); |
| 360 | WARN_ON(!list_empty(&gi->string_list)); |
| 361 | WARN_ON(!list_empty(&gi->available_func)); |
| 362 | kfree(gi->composite.gadget_driver.function); |
| 363 | kfree(gi); |
| 364 | } |
| 365 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 366 | static struct configfs_item_operations gadget_root_item_ops = { |
| 367 | .release = gadget_info_attr_release, |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 368 | }; |
| 369 | |
| 370 | static void gadget_config_attr_release(struct config_item *item) |
| 371 | { |
| 372 | struct config_usb_cfg *cfg = to_config_usb_cfg(item); |
| 373 | |
| 374 | WARN_ON(!list_empty(&cfg->c.functions)); |
| 375 | list_del(&cfg->c.list); |
| 376 | kfree(cfg->c.label); |
| 377 | kfree(cfg); |
| 378 | } |
| 379 | |
| 380 | static int config_usb_cfg_link( |
| 381 | struct config_item *usb_cfg_ci, |
| 382 | struct config_item *usb_func_ci) |
| 383 | { |
| 384 | struct config_usb_cfg *cfg = to_config_usb_cfg(usb_cfg_ci); |
| 385 | struct usb_composite_dev *cdev = cfg->c.cdev; |
| 386 | struct gadget_info *gi = container_of(cdev, struct gadget_info, cdev); |
| 387 | |
| 388 | struct config_group *group = to_config_group(usb_func_ci); |
| 389 | struct usb_function_instance *fi = container_of(group, |
| 390 | struct usb_function_instance, group); |
| 391 | struct usb_function_instance *a_fi; |
| 392 | struct usb_function *f; |
| 393 | int ret; |
| 394 | |
| 395 | mutex_lock(&gi->lock); |
| 396 | /* |
| 397 | * Make sure this function is from within our _this_ gadget and not |
| 398 | * from another gadget or a random directory. |
| 399 | * Also a function instance can only be linked once. |
| 400 | */ |
| 401 | list_for_each_entry(a_fi, &gi->available_func, cfs_list) { |
| 402 | if (a_fi == fi) |
| 403 | break; |
| 404 | } |
| 405 | if (a_fi != fi) { |
| 406 | ret = -EINVAL; |
| 407 | goto out; |
| 408 | } |
| 409 | |
| 410 | list_for_each_entry(f, &cfg->func_list, list) { |
| 411 | if (f->fi == fi) { |
| 412 | ret = -EEXIST; |
| 413 | goto out; |
| 414 | } |
| 415 | } |
| 416 | |
| 417 | f = usb_get_function(fi); |
| 418 | if (IS_ERR(f)) { |
| 419 | ret = PTR_ERR(f); |
| 420 | goto out; |
| 421 | } |
| 422 | |
| 423 | /* stash the function until we bind it to the gadget */ |
| 424 | list_add_tail(&f->list, &cfg->func_list); |
| 425 | ret = 0; |
| 426 | out: |
| 427 | mutex_unlock(&gi->lock); |
| 428 | return ret; |
| 429 | } |
| 430 | |
| 431 | static int config_usb_cfg_unlink( |
| 432 | struct config_item *usb_cfg_ci, |
| 433 | struct config_item *usb_func_ci) |
| 434 | { |
| 435 | struct config_usb_cfg *cfg = to_config_usb_cfg(usb_cfg_ci); |
| 436 | struct usb_composite_dev *cdev = cfg->c.cdev; |
| 437 | struct gadget_info *gi = container_of(cdev, struct gadget_info, cdev); |
| 438 | |
| 439 | struct config_group *group = to_config_group(usb_func_ci); |
| 440 | struct usb_function_instance *fi = container_of(group, |
| 441 | struct usb_function_instance, group); |
| 442 | struct usb_function *f; |
| 443 | |
| 444 | /* |
| 445 | * ideally I would like to forbid to unlink functions while a gadget is |
| 446 | * bound to an UDC. Since this isn't possible at the moment, we simply |
| 447 | * force an unbind, the function is available here and then we can |
| 448 | * remove the function. |
| 449 | */ |
| 450 | mutex_lock(&gi->lock); |
Ruslan Bilovol | afdaadc | 2015-11-23 09:56:36 +0100 | [diff] [blame] | 451 | if (gi->composite.gadget_driver.udc_name) |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 452 | unregister_gadget(gi); |
Ruslan Bilovol | afdaadc | 2015-11-23 09:56:36 +0100 | [diff] [blame] | 453 | WARN_ON(gi->composite.gadget_driver.udc_name); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 454 | |
| 455 | list_for_each_entry(f, &cfg->func_list, list) { |
| 456 | if (f->fi == fi) { |
| 457 | list_del(&f->list); |
| 458 | usb_put_function(f); |
| 459 | mutex_unlock(&gi->lock); |
| 460 | return 0; |
| 461 | } |
| 462 | } |
| 463 | mutex_unlock(&gi->lock); |
David Rientjes | 75bfe23 | 2013-04-07 14:11:47 -0700 | [diff] [blame] | 464 | WARN(1, "Unable to locate function to unbind\n"); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 465 | return 0; |
| 466 | } |
| 467 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 468 | static struct configfs_item_operations gadget_config_item_ops = { |
| 469 | .release = gadget_config_attr_release, |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 470 | .allow_link = config_usb_cfg_link, |
| 471 | .drop_link = config_usb_cfg_unlink, |
| 472 | }; |
| 473 | |
| 474 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 475 | 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] | 476 | char *page) |
| 477 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 478 | 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] | 479 | } |
| 480 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 481 | 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] | 482 | const char *page, size_t len) |
| 483 | { |
| 484 | u16 val; |
| 485 | int ret; |
| 486 | ret = kstrtou16(page, 0, &val); |
| 487 | if (ret) |
| 488 | return ret; |
| 489 | if (DIV_ROUND_UP(val, 8) > 0xff) |
| 490 | return -ERANGE; |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 491 | to_config_usb_cfg(item)->c.MaxPower = val; |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 492 | return len; |
| 493 | } |
| 494 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 495 | 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] | 496 | char *page) |
| 497 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 498 | return sprintf(page, "0x%02x\n", |
| 499 | to_config_usb_cfg(item)->c.bmAttributes); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 500 | } |
| 501 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 502 | 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] | 503 | const char *page, size_t len) |
| 504 | { |
| 505 | u8 val; |
| 506 | int ret; |
| 507 | ret = kstrtou8(page, 0, &val); |
| 508 | if (ret) |
| 509 | return ret; |
| 510 | if (!(val & USB_CONFIG_ATT_ONE)) |
| 511 | return -EINVAL; |
| 512 | if (val & ~(USB_CONFIG_ATT_ONE | USB_CONFIG_ATT_SELFPOWER | |
| 513 | USB_CONFIG_ATT_WAKEUP)) |
| 514 | return -EINVAL; |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 515 | to_config_usb_cfg(item)->c.bmAttributes = val; |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 516 | return len; |
| 517 | } |
| 518 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 519 | CONFIGFS_ATTR(gadget_config_desc_, MaxPower); |
| 520 | CONFIGFS_ATTR(gadget_config_desc_, bmAttributes); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 521 | |
| 522 | static struct configfs_attribute *gadget_config_attrs[] = { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 523 | &gadget_config_desc_attr_MaxPower, |
| 524 | &gadget_config_desc_attr_bmAttributes, |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 525 | NULL, |
| 526 | }; |
| 527 | |
| 528 | static struct config_item_type gadget_config_type = { |
| 529 | .ct_item_ops = &gadget_config_item_ops, |
| 530 | .ct_attrs = gadget_config_attrs, |
| 531 | .ct_owner = THIS_MODULE, |
| 532 | }; |
| 533 | |
| 534 | static struct config_item_type gadget_root_type = { |
| 535 | .ct_item_ops = &gadget_root_item_ops, |
| 536 | .ct_attrs = gadget_root_attrs, |
| 537 | .ct_owner = THIS_MODULE, |
| 538 | }; |
| 539 | |
| 540 | static void composite_init_dev(struct usb_composite_dev *cdev) |
| 541 | { |
| 542 | spin_lock_init(&cdev->lock); |
| 543 | INIT_LIST_HEAD(&cdev->configs); |
| 544 | INIT_LIST_HEAD(&cdev->gstrings); |
| 545 | } |
| 546 | |
| 547 | static struct config_group *function_make( |
| 548 | struct config_group *group, |
| 549 | const char *name) |
| 550 | { |
| 551 | struct gadget_info *gi; |
| 552 | struct usb_function_instance *fi; |
| 553 | char buf[MAX_NAME_LEN]; |
| 554 | char *func_name; |
| 555 | char *instance_name; |
| 556 | int ret; |
| 557 | |
| 558 | ret = snprintf(buf, MAX_NAME_LEN, "%s", name); |
| 559 | if (ret >= MAX_NAME_LEN) |
| 560 | return ERR_PTR(-ENAMETOOLONG); |
| 561 | |
| 562 | func_name = buf; |
| 563 | instance_name = strchr(func_name, '.'); |
| 564 | if (!instance_name) { |
| 565 | pr_err("Unable to locate . in FUNC.INSTANCE\n"); |
| 566 | return ERR_PTR(-EINVAL); |
| 567 | } |
| 568 | *instance_name = '\0'; |
| 569 | instance_name++; |
| 570 | |
| 571 | fi = usb_get_function_instance(func_name); |
| 572 | if (IS_ERR(fi)) |
Duan Jiong | a346941 | 2013-09-26 15:55:25 +0800 | [diff] [blame] | 573 | return ERR_CAST(fi); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 574 | |
Nicolas Iooss | 3958b79 | 2015-07-17 16:23:45 -0700 | [diff] [blame] | 575 | ret = config_item_set_name(&fi->group.cg_item, "%s", name); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 576 | if (ret) { |
| 577 | usb_put_function_instance(fi); |
| 578 | return ERR_PTR(ret); |
| 579 | } |
Andrzej Pietrasiewicz | 1933861 | 2013-12-03 15:15:21 +0100 | [diff] [blame] | 580 | if (fi->set_inst_name) { |
| 581 | ret = fi->set_inst_name(fi, instance_name); |
| 582 | if (ret) { |
| 583 | usb_put_function_instance(fi); |
| 584 | return ERR_PTR(ret); |
| 585 | } |
| 586 | } |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 587 | |
| 588 | gi = container_of(group, struct gadget_info, functions_group); |
| 589 | |
| 590 | mutex_lock(&gi->lock); |
| 591 | list_add_tail(&fi->cfs_list, &gi->available_func); |
| 592 | mutex_unlock(&gi->lock); |
| 593 | return &fi->group; |
| 594 | } |
| 595 | |
| 596 | static void function_drop( |
| 597 | struct config_group *group, |
| 598 | struct config_item *item) |
| 599 | { |
| 600 | struct usb_function_instance *fi = to_usb_function_instance(item); |
| 601 | struct gadget_info *gi; |
| 602 | |
| 603 | gi = container_of(group, struct gadget_info, functions_group); |
| 604 | |
| 605 | mutex_lock(&gi->lock); |
| 606 | list_del(&fi->cfs_list); |
| 607 | mutex_unlock(&gi->lock); |
| 608 | config_item_put(item); |
| 609 | } |
| 610 | |
| 611 | static struct configfs_group_operations functions_ops = { |
| 612 | .make_group = &function_make, |
| 613 | .drop_item = &function_drop, |
| 614 | }; |
| 615 | |
| 616 | static struct config_item_type functions_type = { |
| 617 | .ct_group_ops = &functions_ops, |
| 618 | .ct_owner = THIS_MODULE, |
| 619 | }; |
| 620 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 621 | GS_STRINGS_RW(gadget_config_name, configuration); |
| 622 | |
| 623 | static struct configfs_attribute *gadget_config_name_langid_attrs[] = { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 624 | &gadget_config_name_attr_configuration, |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 625 | NULL, |
| 626 | }; |
| 627 | |
| 628 | static void gadget_config_name_attr_release(struct config_item *item) |
| 629 | { |
| 630 | struct gadget_config_name *cn = to_gadget_config_name(item); |
| 631 | |
| 632 | kfree(cn->configuration); |
| 633 | |
| 634 | list_del(&cn->list); |
| 635 | kfree(cn); |
| 636 | } |
| 637 | |
| 638 | USB_CONFIG_STRING_RW_OPS(gadget_config_name); |
| 639 | USB_CONFIG_STRINGS_LANG(gadget_config_name, config_usb_cfg); |
| 640 | |
| 641 | static struct config_group *config_desc_make( |
| 642 | struct config_group *group, |
| 643 | const char *name) |
| 644 | { |
| 645 | struct gadget_info *gi; |
| 646 | struct config_usb_cfg *cfg; |
| 647 | char buf[MAX_NAME_LEN]; |
| 648 | char *num_str; |
| 649 | u8 num; |
| 650 | int ret; |
| 651 | |
| 652 | gi = container_of(group, struct gadget_info, configs_group); |
| 653 | ret = snprintf(buf, MAX_NAME_LEN, "%s", name); |
| 654 | if (ret >= MAX_NAME_LEN) |
| 655 | return ERR_PTR(-ENAMETOOLONG); |
| 656 | |
| 657 | num_str = strchr(buf, '.'); |
| 658 | if (!num_str) { |
| 659 | pr_err("Unable to locate . in name.bConfigurationValue\n"); |
| 660 | return ERR_PTR(-EINVAL); |
| 661 | } |
| 662 | |
| 663 | *num_str = '\0'; |
| 664 | num_str++; |
| 665 | |
| 666 | if (!strlen(buf)) |
| 667 | return ERR_PTR(-EINVAL); |
| 668 | |
| 669 | ret = kstrtou8(num_str, 0, &num); |
| 670 | if (ret) |
| 671 | return ERR_PTR(ret); |
| 672 | |
| 673 | cfg = kzalloc(sizeof(*cfg), GFP_KERNEL); |
| 674 | if (!cfg) |
| 675 | return ERR_PTR(-ENOMEM); |
| 676 | cfg->c.label = kstrdup(buf, GFP_KERNEL); |
| 677 | if (!cfg->c.label) { |
| 678 | ret = -ENOMEM; |
| 679 | goto err; |
| 680 | } |
| 681 | cfg->c.bConfigurationValue = num; |
| 682 | cfg->c.MaxPower = CONFIG_USB_GADGET_VBUS_DRAW; |
| 683 | cfg->c.bmAttributes = USB_CONFIG_ATT_ONE; |
| 684 | INIT_LIST_HEAD(&cfg->string_list); |
| 685 | INIT_LIST_HEAD(&cfg->func_list); |
| 686 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 687 | config_group_init_type_name(&cfg->group, name, |
| 688 | &gadget_config_type); |
Christoph Hellwig | 1ae1602 | 2016-02-26 11:02:14 +0100 | [diff] [blame] | 689 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 690 | config_group_init_type_name(&cfg->strings_group, "strings", |
| 691 | &gadget_config_name_strings_type); |
Christoph Hellwig | 1ae1602 | 2016-02-26 11:02:14 +0100 | [diff] [blame] | 692 | configfs_add_default_group(&cfg->strings_group, &cfg->group); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 693 | |
| 694 | ret = usb_add_config_only(&gi->cdev, &cfg->c); |
| 695 | if (ret) |
| 696 | goto err; |
| 697 | |
| 698 | return &cfg->group; |
| 699 | err: |
| 700 | kfree(cfg->c.label); |
| 701 | kfree(cfg); |
| 702 | return ERR_PTR(ret); |
| 703 | } |
| 704 | |
| 705 | static void config_desc_drop( |
| 706 | struct config_group *group, |
| 707 | struct config_item *item) |
| 708 | { |
| 709 | config_item_put(item); |
| 710 | } |
| 711 | |
| 712 | static struct configfs_group_operations config_desc_ops = { |
| 713 | .make_group = &config_desc_make, |
| 714 | .drop_item = &config_desc_drop, |
| 715 | }; |
| 716 | |
| 717 | static struct config_item_type config_desc_type = { |
| 718 | .ct_group_ops = &config_desc_ops, |
| 719 | .ct_owner = THIS_MODULE, |
| 720 | }; |
| 721 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 722 | GS_STRINGS_RW(gadget_strings, manufacturer); |
| 723 | GS_STRINGS_RW(gadget_strings, product); |
| 724 | GS_STRINGS_RW(gadget_strings, serialnumber); |
| 725 | |
| 726 | static struct configfs_attribute *gadget_strings_langid_attrs[] = { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 727 | &gadget_strings_attr_manufacturer, |
| 728 | &gadget_strings_attr_product, |
| 729 | &gadget_strings_attr_serialnumber, |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 730 | NULL, |
| 731 | }; |
| 732 | |
| 733 | static void gadget_strings_attr_release(struct config_item *item) |
| 734 | { |
| 735 | struct gadget_strings *gs = to_gadget_strings(item); |
| 736 | |
| 737 | kfree(gs->manufacturer); |
| 738 | kfree(gs->product); |
| 739 | kfree(gs->serialnumber); |
| 740 | |
| 741 | list_del(&gs->list); |
| 742 | kfree(gs); |
| 743 | } |
| 744 | |
| 745 | USB_CONFIG_STRING_RW_OPS(gadget_strings); |
| 746 | USB_CONFIG_STRINGS_LANG(gadget_strings, gadget_info); |
| 747 | |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 748 | static inline struct os_desc *to_os_desc(struct config_item *item) |
| 749 | { |
| 750 | return container_of(to_config_group(item), struct os_desc, group); |
| 751 | } |
| 752 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 753 | static inline struct gadget_info *os_desc_item_to_gadget_info( |
| 754 | struct config_item *item) |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 755 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 756 | 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] | 757 | } |
| 758 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 759 | static ssize_t os_desc_use_show(struct config_item *item, char *page) |
| 760 | { |
| 761 | return sprintf(page, "%d", |
| 762 | os_desc_item_to_gadget_info(item)->use_os_desc); |
| 763 | } |
| 764 | |
| 765 | 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] | 766 | size_t len) |
| 767 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 768 | struct gadget_info *gi = os_desc_item_to_gadget_info(item); |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 769 | int ret; |
| 770 | bool use; |
| 771 | |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 772 | mutex_lock(&gi->lock); |
| 773 | ret = strtobool(page, &use); |
| 774 | if (!ret) { |
| 775 | gi->use_os_desc = use; |
| 776 | ret = len; |
| 777 | } |
| 778 | mutex_unlock(&gi->lock); |
| 779 | |
| 780 | return ret; |
| 781 | } |
| 782 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 783 | 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] | 784 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 785 | return sprintf(page, "%d", |
| 786 | os_desc_item_to_gadget_info(item)->b_vendor_code); |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 787 | } |
| 788 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 789 | 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] | 790 | const char *page, size_t len) |
| 791 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 792 | struct gadget_info *gi = os_desc_item_to_gadget_info(item); |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 793 | int ret; |
| 794 | u8 b_vendor_code; |
| 795 | |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 796 | mutex_lock(&gi->lock); |
| 797 | ret = kstrtou8(page, 0, &b_vendor_code); |
| 798 | if (!ret) { |
| 799 | gi->b_vendor_code = b_vendor_code; |
| 800 | ret = len; |
| 801 | } |
| 802 | mutex_unlock(&gi->lock); |
| 803 | |
| 804 | return ret; |
| 805 | } |
| 806 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 807 | 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] | 808 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 809 | struct gadget_info *gi = os_desc_item_to_gadget_info(item); |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 810 | |
| 811 | memcpy(page, gi->qw_sign, OS_STRING_QW_SIGN_LEN); |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 812 | return OS_STRING_QW_SIGN_LEN; |
| 813 | } |
| 814 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 815 | 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] | 816 | size_t len) |
| 817 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 818 | struct gadget_info *gi = os_desc_item_to_gadget_info(item); |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 819 | int res, l; |
| 820 | |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 821 | l = min((int)len, OS_STRING_QW_SIGN_LEN >> 1); |
| 822 | if (page[l - 1] == '\n') |
| 823 | --l; |
| 824 | |
| 825 | mutex_lock(&gi->lock); |
| 826 | res = utf8s_to_utf16s(page, l, |
| 827 | UTF16_LITTLE_ENDIAN, (wchar_t *) gi->qw_sign, |
| 828 | OS_STRING_QW_SIGN_LEN); |
| 829 | if (res > 0) |
| 830 | res = len; |
| 831 | mutex_unlock(&gi->lock); |
| 832 | |
| 833 | return res; |
| 834 | } |
| 835 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 836 | CONFIGFS_ATTR(os_desc_, use); |
| 837 | CONFIGFS_ATTR(os_desc_, b_vendor_code); |
| 838 | CONFIGFS_ATTR(os_desc_, qw_sign); |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 839 | |
| 840 | static struct configfs_attribute *os_desc_attrs[] = { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 841 | &os_desc_attr_use, |
| 842 | &os_desc_attr_b_vendor_code, |
| 843 | &os_desc_attr_qw_sign, |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 844 | NULL, |
| 845 | }; |
| 846 | |
| 847 | static void os_desc_attr_release(struct config_item *item) |
| 848 | { |
| 849 | struct os_desc *os_desc = to_os_desc(item); |
| 850 | kfree(os_desc); |
| 851 | } |
| 852 | |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 853 | static int os_desc_link(struct config_item *os_desc_ci, |
| 854 | struct config_item *usb_cfg_ci) |
| 855 | { |
| 856 | struct gadget_info *gi = container_of(to_config_group(os_desc_ci), |
| 857 | struct gadget_info, os_desc_group); |
| 858 | struct usb_composite_dev *cdev = &gi->cdev; |
| 859 | struct config_usb_cfg *c_target = |
| 860 | container_of(to_config_group(usb_cfg_ci), |
| 861 | struct config_usb_cfg, group); |
| 862 | struct usb_configuration *c; |
| 863 | int ret; |
| 864 | |
| 865 | mutex_lock(&gi->lock); |
| 866 | list_for_each_entry(c, &cdev->configs, list) { |
| 867 | if (c == &c_target->c) |
| 868 | break; |
| 869 | } |
| 870 | if (c != &c_target->c) { |
| 871 | ret = -EINVAL; |
| 872 | goto out; |
| 873 | } |
| 874 | |
| 875 | if (cdev->os_desc_config) { |
| 876 | ret = -EBUSY; |
| 877 | goto out; |
| 878 | } |
| 879 | |
| 880 | cdev->os_desc_config = &c_target->c; |
| 881 | ret = 0; |
| 882 | |
| 883 | out: |
| 884 | mutex_unlock(&gi->lock); |
| 885 | return ret; |
| 886 | } |
| 887 | |
| 888 | static int os_desc_unlink(struct config_item *os_desc_ci, |
| 889 | struct config_item *usb_cfg_ci) |
| 890 | { |
| 891 | struct gadget_info *gi = container_of(to_config_group(os_desc_ci), |
| 892 | struct gadget_info, os_desc_group); |
| 893 | struct usb_composite_dev *cdev = &gi->cdev; |
| 894 | |
| 895 | mutex_lock(&gi->lock); |
Ruslan Bilovol | afdaadc | 2015-11-23 09:56:36 +0100 | [diff] [blame] | 896 | if (gi->composite.gadget_driver.udc_name) |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 897 | unregister_gadget(gi); |
| 898 | cdev->os_desc_config = NULL; |
Ruslan Bilovol | afdaadc | 2015-11-23 09:56:36 +0100 | [diff] [blame] | 899 | WARN_ON(gi->composite.gadget_driver.udc_name); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 900 | mutex_unlock(&gi->lock); |
| 901 | return 0; |
| 902 | } |
| 903 | |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 904 | static struct configfs_item_operations os_desc_ops = { |
| 905 | .release = os_desc_attr_release, |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 906 | .allow_link = os_desc_link, |
| 907 | .drop_link = os_desc_unlink, |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 908 | }; |
| 909 | |
| 910 | static struct config_item_type os_desc_type = { |
| 911 | .ct_item_ops = &os_desc_ops, |
| 912 | .ct_attrs = os_desc_attrs, |
| 913 | .ct_owner = THIS_MODULE, |
| 914 | }; |
| 915 | |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 916 | static inline struct usb_os_desc_ext_prop |
| 917 | *to_usb_os_desc_ext_prop(struct config_item *item) |
| 918 | { |
| 919 | return container_of(item, struct usb_os_desc_ext_prop, item); |
| 920 | } |
| 921 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 922 | 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] | 923 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 924 | return sprintf(page, "%d", to_usb_os_desc_ext_prop(item)->type); |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 925 | } |
| 926 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 927 | static ssize_t ext_prop_type_store(struct config_item *item, |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 928 | const char *page, size_t len) |
| 929 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 930 | 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] | 931 | struct usb_os_desc *desc = to_usb_os_desc(ext_prop->item.ci_parent); |
| 932 | u8 type; |
| 933 | int ret; |
| 934 | |
| 935 | if (desc->opts_mutex) |
| 936 | mutex_lock(desc->opts_mutex); |
| 937 | ret = kstrtou8(page, 0, &type); |
| 938 | if (ret) |
| 939 | goto end; |
| 940 | if (type < USB_EXT_PROP_UNICODE || type > USB_EXT_PROP_UNICODE_MULTI) { |
| 941 | ret = -EINVAL; |
| 942 | goto end; |
| 943 | } |
| 944 | |
| 945 | if ((ext_prop->type == USB_EXT_PROP_BINARY || |
| 946 | ext_prop->type == USB_EXT_PROP_LE32 || |
| 947 | ext_prop->type == USB_EXT_PROP_BE32) && |
| 948 | (type == USB_EXT_PROP_UNICODE || |
| 949 | type == USB_EXT_PROP_UNICODE_ENV || |
| 950 | type == USB_EXT_PROP_UNICODE_LINK)) |
| 951 | ext_prop->data_len <<= 1; |
| 952 | else if ((ext_prop->type == USB_EXT_PROP_UNICODE || |
| 953 | ext_prop->type == USB_EXT_PROP_UNICODE_ENV || |
| 954 | ext_prop->type == USB_EXT_PROP_UNICODE_LINK) && |
| 955 | (type == USB_EXT_PROP_BINARY || |
| 956 | type == USB_EXT_PROP_LE32 || |
| 957 | type == USB_EXT_PROP_BE32)) |
| 958 | ext_prop->data_len >>= 1; |
| 959 | ext_prop->type = type; |
| 960 | ret = len; |
| 961 | |
| 962 | end: |
| 963 | if (desc->opts_mutex) |
| 964 | mutex_unlock(desc->opts_mutex); |
| 965 | return ret; |
| 966 | } |
| 967 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 968 | 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] | 969 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 970 | 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] | 971 | int len = ext_prop->data_len; |
| 972 | |
| 973 | if (ext_prop->type == USB_EXT_PROP_UNICODE || |
| 974 | ext_prop->type == USB_EXT_PROP_UNICODE_ENV || |
| 975 | ext_prop->type == USB_EXT_PROP_UNICODE_LINK) |
| 976 | len >>= 1; |
| 977 | memcpy(page, ext_prop->data, len); |
| 978 | |
| 979 | return len; |
| 980 | } |
| 981 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 982 | static ssize_t ext_prop_data_store(struct config_item *item, |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 983 | const char *page, size_t len) |
| 984 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 985 | 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] | 986 | struct usb_os_desc *desc = to_usb_os_desc(ext_prop->item.ci_parent); |
| 987 | char *new_data; |
| 988 | size_t ret_len = len; |
| 989 | |
| 990 | if (page[len - 1] == '\n' || page[len - 1] == '\0') |
| 991 | --len; |
Benoit Taine | 58b949e | 2014-05-26 17:21:20 +0200 | [diff] [blame] | 992 | new_data = kmemdup(page, len, GFP_KERNEL); |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 993 | if (!new_data) |
| 994 | return -ENOMEM; |
| 995 | |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 996 | if (desc->opts_mutex) |
| 997 | mutex_lock(desc->opts_mutex); |
| 998 | kfree(ext_prop->data); |
| 999 | ext_prop->data = new_data; |
| 1000 | desc->ext_prop_len -= ext_prop->data_len; |
| 1001 | ext_prop->data_len = len; |
| 1002 | desc->ext_prop_len += ext_prop->data_len; |
| 1003 | if (ext_prop->type == USB_EXT_PROP_UNICODE || |
| 1004 | ext_prop->type == USB_EXT_PROP_UNICODE_ENV || |
| 1005 | ext_prop->type == USB_EXT_PROP_UNICODE_LINK) { |
| 1006 | desc->ext_prop_len -= ext_prop->data_len; |
| 1007 | ext_prop->data_len <<= 1; |
| 1008 | ext_prop->data_len += 2; |
| 1009 | desc->ext_prop_len += ext_prop->data_len; |
| 1010 | } |
| 1011 | if (desc->opts_mutex) |
| 1012 | mutex_unlock(desc->opts_mutex); |
| 1013 | return ret_len; |
| 1014 | } |
| 1015 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 1016 | CONFIGFS_ATTR(ext_prop_, type); |
| 1017 | CONFIGFS_ATTR(ext_prop_, data); |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 1018 | |
| 1019 | static struct configfs_attribute *ext_prop_attrs[] = { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 1020 | &ext_prop_attr_type, |
| 1021 | &ext_prop_attr_data, |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 1022 | NULL, |
| 1023 | }; |
| 1024 | |
| 1025 | static void usb_os_desc_ext_prop_release(struct config_item *item) |
| 1026 | { |
| 1027 | struct usb_os_desc_ext_prop *ext_prop = to_usb_os_desc_ext_prop(item); |
| 1028 | |
| 1029 | kfree(ext_prop); /* frees a whole chunk */ |
| 1030 | } |
| 1031 | |
| 1032 | static struct configfs_item_operations ext_prop_ops = { |
| 1033 | .release = usb_os_desc_ext_prop_release, |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 1034 | }; |
| 1035 | |
| 1036 | static struct config_item *ext_prop_make( |
| 1037 | struct config_group *group, |
| 1038 | const char *name) |
| 1039 | { |
| 1040 | struct usb_os_desc_ext_prop *ext_prop; |
| 1041 | struct config_item_type *ext_prop_type; |
| 1042 | struct usb_os_desc *desc; |
| 1043 | char *vlabuf; |
| 1044 | |
| 1045 | vla_group(data_chunk); |
| 1046 | vla_item(data_chunk, struct usb_os_desc_ext_prop, ext_prop, 1); |
| 1047 | vla_item(data_chunk, struct config_item_type, ext_prop_type, 1); |
| 1048 | |
| 1049 | vlabuf = kzalloc(vla_group_size(data_chunk), GFP_KERNEL); |
| 1050 | if (!vlabuf) |
| 1051 | return ERR_PTR(-ENOMEM); |
| 1052 | |
| 1053 | ext_prop = vla_ptr(vlabuf, data_chunk, ext_prop); |
| 1054 | ext_prop_type = vla_ptr(vlabuf, data_chunk, ext_prop_type); |
| 1055 | |
| 1056 | desc = container_of(group, struct usb_os_desc, group); |
| 1057 | ext_prop_type->ct_item_ops = &ext_prop_ops; |
| 1058 | ext_prop_type->ct_attrs = ext_prop_attrs; |
| 1059 | ext_prop_type->ct_owner = desc->owner; |
| 1060 | |
| 1061 | config_item_init_type_name(&ext_prop->item, name, ext_prop_type); |
| 1062 | |
| 1063 | ext_prop->name = kstrdup(name, GFP_KERNEL); |
| 1064 | if (!ext_prop->name) { |
| 1065 | kfree(vlabuf); |
| 1066 | return ERR_PTR(-ENOMEM); |
| 1067 | } |
| 1068 | desc->ext_prop_len += 14; |
| 1069 | ext_prop->name_len = 2 * strlen(ext_prop->name) + 2; |
| 1070 | if (desc->opts_mutex) |
| 1071 | mutex_lock(desc->opts_mutex); |
| 1072 | desc->ext_prop_len += ext_prop->name_len; |
| 1073 | list_add_tail(&ext_prop->entry, &desc->ext_prop); |
| 1074 | ++desc->ext_prop_count; |
| 1075 | if (desc->opts_mutex) |
| 1076 | mutex_unlock(desc->opts_mutex); |
| 1077 | |
| 1078 | return &ext_prop->item; |
| 1079 | } |
| 1080 | |
| 1081 | static void ext_prop_drop(struct config_group *group, struct config_item *item) |
| 1082 | { |
| 1083 | struct usb_os_desc_ext_prop *ext_prop = to_usb_os_desc_ext_prop(item); |
| 1084 | struct usb_os_desc *desc = to_usb_os_desc(&group->cg_item); |
| 1085 | |
| 1086 | if (desc->opts_mutex) |
| 1087 | mutex_lock(desc->opts_mutex); |
| 1088 | list_del(&ext_prop->entry); |
| 1089 | --desc->ext_prop_count; |
| 1090 | kfree(ext_prop->name); |
| 1091 | desc->ext_prop_len -= (ext_prop->name_len + ext_prop->data_len + 14); |
| 1092 | if (desc->opts_mutex) |
| 1093 | mutex_unlock(desc->opts_mutex); |
| 1094 | config_item_put(item); |
| 1095 | } |
| 1096 | |
| 1097 | static struct configfs_group_operations interf_grp_ops = { |
| 1098 | .make_item = &ext_prop_make, |
| 1099 | .drop_item = &ext_prop_drop, |
| 1100 | }; |
| 1101 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 1102 | static ssize_t interf_grp_compatible_id_show(struct config_item *item, |
Andrzej Pietrasiewicz | fe00b13 | 2014-06-18 14:24:48 +0200 | [diff] [blame] | 1103 | char *page) |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1104 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 1105 | memcpy(page, to_usb_os_desc(item)->ext_compat_id, 8); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1106 | return 8; |
| 1107 | } |
| 1108 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 1109 | static ssize_t interf_grp_compatible_id_store(struct config_item *item, |
Andrzej Pietrasiewicz | fe00b13 | 2014-06-18 14:24:48 +0200 | [diff] [blame] | 1110 | const char *page, size_t len) |
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 | struct usb_os_desc *desc = to_usb_os_desc(item); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1113 | int l; |
| 1114 | |
| 1115 | l = min_t(int, 8, len); |
| 1116 | if (page[l - 1] == '\n') |
| 1117 | --l; |
| 1118 | if (desc->opts_mutex) |
| 1119 | mutex_lock(desc->opts_mutex); |
| 1120 | memcpy(desc->ext_compat_id, page, l); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1121 | |
| 1122 | if (desc->opts_mutex) |
| 1123 | mutex_unlock(desc->opts_mutex); |
| 1124 | |
| 1125 | return len; |
| 1126 | } |
| 1127 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 1128 | 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] | 1129 | char *page) |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1130 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 1131 | memcpy(page, to_usb_os_desc(item)->ext_compat_id + 8, 8); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1132 | return 8; |
| 1133 | } |
| 1134 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 1135 | 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] | 1136 | const char *page, size_t len) |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1137 | { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 1138 | struct usb_os_desc *desc = to_usb_os_desc(item); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1139 | int l; |
| 1140 | |
| 1141 | l = min_t(int, 8, len); |
| 1142 | if (page[l - 1] == '\n') |
| 1143 | --l; |
| 1144 | if (desc->opts_mutex) |
| 1145 | mutex_lock(desc->opts_mutex); |
| 1146 | memcpy(desc->ext_compat_id + 8, page, l); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1147 | |
| 1148 | if (desc->opts_mutex) |
| 1149 | mutex_unlock(desc->opts_mutex); |
| 1150 | |
| 1151 | return len; |
| 1152 | } |
| 1153 | |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 1154 | CONFIGFS_ATTR(interf_grp_, compatible_id); |
| 1155 | CONFIGFS_ATTR(interf_grp_, sub_compatible_id); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1156 | |
| 1157 | static struct configfs_attribute *interf_grp_attrs[] = { |
Christoph Hellwig | 45b6a73 | 2015-10-03 15:32:38 +0200 | [diff] [blame] | 1158 | &interf_grp_attr_compatible_id, |
| 1159 | &interf_grp_attr_sub_compatible_id, |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1160 | NULL |
| 1161 | }; |
| 1162 | |
| 1163 | int usb_os_desc_prepare_interf_dir(struct config_group *parent, |
| 1164 | int n_interf, |
| 1165 | struct usb_os_desc **desc, |
Andrzej Pietrasiewicz | 14574b5 | 2014-06-18 14:24:49 +0200 | [diff] [blame] | 1166 | char **names, |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1167 | struct module *owner) |
| 1168 | { |
Christoph Hellwig | 1ae1602 | 2016-02-26 11:02:14 +0100 | [diff] [blame] | 1169 | struct config_group *os_desc_group; |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1170 | struct config_item_type *os_desc_type, *interface_type; |
| 1171 | |
| 1172 | vla_group(data_chunk); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1173 | vla_item(data_chunk, struct config_group, os_desc_group, 1); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1174 | vla_item(data_chunk, struct config_item_type, os_desc_type, 1); |
| 1175 | vla_item(data_chunk, struct config_item_type, interface_type, 1); |
| 1176 | |
| 1177 | char *vlabuf = kzalloc(vla_group_size(data_chunk), GFP_KERNEL); |
| 1178 | if (!vlabuf) |
| 1179 | return -ENOMEM; |
| 1180 | |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1181 | os_desc_group = vla_ptr(vlabuf, data_chunk, os_desc_group); |
| 1182 | os_desc_type = vla_ptr(vlabuf, data_chunk, os_desc_type); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1183 | interface_type = vla_ptr(vlabuf, data_chunk, interface_type); |
| 1184 | |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1185 | os_desc_type->ct_owner = owner; |
| 1186 | 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] | 1187 | configfs_add_default_group(os_desc_group, parent); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1188 | |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 1189 | interface_type->ct_group_ops = &interf_grp_ops; |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1190 | interface_type->ct_attrs = interf_grp_attrs; |
| 1191 | interface_type->ct_owner = owner; |
| 1192 | |
| 1193 | while (n_interf--) { |
| 1194 | struct usb_os_desc *d; |
| 1195 | |
| 1196 | d = desc[n_interf]; |
Andrzej Pietrasiewicz | 7419485 | 2014-05-08 14:06:28 +0200 | [diff] [blame] | 1197 | d->owner = owner; |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1198 | config_group_init_type_name(&d->group, "", interface_type); |
Andrzej Pietrasiewicz | 14574b5 | 2014-06-18 14:24:49 +0200 | [diff] [blame] | 1199 | config_item_set_name(&d->group.cg_item, "interface.%s", |
| 1200 | names[n_interf]); |
Christoph Hellwig | 1ae1602 | 2016-02-26 11:02:14 +0100 | [diff] [blame] | 1201 | configfs_add_default_group(&d->group, os_desc_group); |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1202 | } |
| 1203 | |
| 1204 | return 0; |
| 1205 | } |
| 1206 | EXPORT_SYMBOL(usb_os_desc_prepare_interf_dir); |
| 1207 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1208 | static int configfs_do_nothing(struct usb_composite_dev *cdev) |
| 1209 | { |
David Rientjes | 75bfe23 | 2013-04-07 14:11:47 -0700 | [diff] [blame] | 1210 | WARN_ON(1); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1211 | return -EINVAL; |
| 1212 | } |
| 1213 | |
| 1214 | int composite_dev_prepare(struct usb_composite_driver *composite, |
| 1215 | struct usb_composite_dev *dev); |
| 1216 | |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1217 | int composite_os_desc_req_prepare(struct usb_composite_dev *cdev, |
| 1218 | struct usb_ep *ep0); |
| 1219 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1220 | static void purge_configs_funcs(struct gadget_info *gi) |
| 1221 | { |
| 1222 | struct usb_configuration *c; |
| 1223 | |
| 1224 | list_for_each_entry(c, &gi->cdev.configs, list) { |
| 1225 | struct usb_function *f, *tmp; |
| 1226 | struct config_usb_cfg *cfg; |
| 1227 | |
| 1228 | cfg = container_of(c, struct config_usb_cfg, c); |
| 1229 | |
| 1230 | list_for_each_entry_safe(f, tmp, &c->functions, list) { |
| 1231 | |
| 1232 | list_move_tail(&f->list, &cfg->func_list); |
| 1233 | if (f->unbind) { |
Romain Izard | da7b895 | 2016-08-29 12:22:29 +0300 | [diff] [blame] | 1234 | dev_dbg(&gi->cdev.gadget->dev, |
Romain Izard | a08f5db | 2016-07-26 18:21:46 +0200 | [diff] [blame] | 1235 | "unbind function '%s'/%p\n", |
| 1236 | f->name, f); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1237 | f->unbind(c, f); |
| 1238 | } |
| 1239 | } |
| 1240 | c->next_interface_id = 0; |
Krzysztof Opasiak | 903124f | 2015-03-20 15:48:56 +0100 | [diff] [blame] | 1241 | memset(c->interface, 0, sizeof(c->interface)); |
John Youn | 554eead | 2016-02-05 17:06:35 -0800 | [diff] [blame] | 1242 | c->superspeed_plus = 0; |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1243 | c->superspeed = 0; |
| 1244 | c->highspeed = 0; |
| 1245 | c->fullspeed = 0; |
| 1246 | } |
| 1247 | } |
| 1248 | |
| 1249 | static int configfs_composite_bind(struct usb_gadget *gadget, |
| 1250 | struct usb_gadget_driver *gdriver) |
| 1251 | { |
| 1252 | struct usb_composite_driver *composite = to_cdriver(gdriver); |
| 1253 | struct gadget_info *gi = container_of(composite, |
| 1254 | struct gadget_info, composite); |
| 1255 | struct usb_composite_dev *cdev = &gi->cdev; |
| 1256 | struct usb_configuration *c; |
| 1257 | struct usb_string *s; |
| 1258 | unsigned i; |
| 1259 | int ret; |
| 1260 | |
| 1261 | /* the gi->lock is hold by the caller */ |
| 1262 | cdev->gadget = gadget; |
| 1263 | set_gadget_data(gadget, cdev); |
| 1264 | ret = composite_dev_prepare(composite, cdev); |
| 1265 | if (ret) |
| 1266 | return ret; |
| 1267 | /* and now the gadget bind */ |
| 1268 | ret = -EINVAL; |
| 1269 | |
| 1270 | if (list_empty(&gi->cdev.configs)) { |
Peter Chen | 4d9f872 | 2014-05-05 07:39:34 +0800 | [diff] [blame] | 1271 | pr_err("Need at least one configuration in %s.\n", |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1272 | gi->composite.name); |
| 1273 | goto err_comp_cleanup; |
| 1274 | } |
| 1275 | |
| 1276 | |
| 1277 | list_for_each_entry(c, &gi->cdev.configs, list) { |
| 1278 | struct config_usb_cfg *cfg; |
| 1279 | |
| 1280 | cfg = container_of(c, struct config_usb_cfg, c); |
| 1281 | if (list_empty(&cfg->func_list)) { |
Peter Chen | 4d9f872 | 2014-05-05 07:39:34 +0800 | [diff] [blame] | 1282 | 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] | 1283 | c->label, c->bConfigurationValue, |
| 1284 | gi->composite.name); |
| 1285 | goto err_comp_cleanup; |
| 1286 | } |
| 1287 | } |
| 1288 | |
| 1289 | /* init all strings */ |
| 1290 | if (!list_empty(&gi->string_list)) { |
| 1291 | struct gadget_strings *gs; |
| 1292 | |
| 1293 | i = 0; |
| 1294 | list_for_each_entry(gs, &gi->string_list, list) { |
| 1295 | |
| 1296 | gi->gstrings[i] = &gs->stringtab_dev; |
| 1297 | gs->stringtab_dev.strings = gs->strings; |
| 1298 | gs->strings[USB_GADGET_MANUFACTURER_IDX].s = |
| 1299 | gs->manufacturer; |
| 1300 | gs->strings[USB_GADGET_PRODUCT_IDX].s = gs->product; |
| 1301 | gs->strings[USB_GADGET_SERIAL_IDX].s = gs->serialnumber; |
| 1302 | i++; |
| 1303 | } |
| 1304 | gi->gstrings[i] = NULL; |
| 1305 | s = usb_gstrings_attach(&gi->cdev, gi->gstrings, |
| 1306 | USB_GADGET_FIRST_AVAIL_IDX); |
Wei Yongjun | fea7707 | 2013-05-07 19:50:31 +0800 | [diff] [blame] | 1307 | if (IS_ERR(s)) { |
| 1308 | ret = PTR_ERR(s); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1309 | goto err_comp_cleanup; |
Wei Yongjun | fea7707 | 2013-05-07 19:50:31 +0800 | [diff] [blame] | 1310 | } |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1311 | |
| 1312 | gi->cdev.desc.iManufacturer = s[USB_GADGET_MANUFACTURER_IDX].id; |
| 1313 | gi->cdev.desc.iProduct = s[USB_GADGET_PRODUCT_IDX].id; |
| 1314 | gi->cdev.desc.iSerialNumber = s[USB_GADGET_SERIAL_IDX].id; |
| 1315 | } |
| 1316 | |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 1317 | if (gi->use_os_desc) { |
| 1318 | cdev->use_os_string = true; |
| 1319 | cdev->b_vendor_code = gi->b_vendor_code; |
| 1320 | memcpy(cdev->qw_sign, gi->qw_sign, OS_STRING_QW_SIGN_LEN); |
| 1321 | } |
| 1322 | |
Li Jun | 41ce84c | 2015-07-09 15:18:48 +0800 | [diff] [blame] | 1323 | if (gadget_is_otg(gadget) && !otg_desc[0]) { |
| 1324 | struct usb_descriptor_header *usb_desc; |
| 1325 | |
| 1326 | usb_desc = usb_otg_descriptor_alloc(gadget); |
| 1327 | if (!usb_desc) { |
| 1328 | ret = -ENOMEM; |
| 1329 | goto err_comp_cleanup; |
| 1330 | } |
| 1331 | usb_otg_descriptor_init(gadget, usb_desc); |
| 1332 | otg_desc[0] = usb_desc; |
| 1333 | otg_desc[1] = NULL; |
| 1334 | } |
| 1335 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1336 | /* Go through all configs, attach all functions */ |
| 1337 | list_for_each_entry(c, &gi->cdev.configs, list) { |
| 1338 | struct config_usb_cfg *cfg; |
| 1339 | struct usb_function *f; |
| 1340 | struct usb_function *tmp; |
| 1341 | struct gadget_config_name *cn; |
| 1342 | |
Li Jun | 41ce84c | 2015-07-09 15:18:48 +0800 | [diff] [blame] | 1343 | if (gadget_is_otg(gadget)) |
| 1344 | c->descriptors = otg_desc; |
| 1345 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1346 | cfg = container_of(c, struct config_usb_cfg, c); |
| 1347 | if (!list_empty(&cfg->string_list)) { |
| 1348 | i = 0; |
| 1349 | list_for_each_entry(cn, &cfg->string_list, list) { |
| 1350 | cfg->gstrings[i] = &cn->stringtab_dev; |
| 1351 | cn->stringtab_dev.strings = &cn->strings; |
| 1352 | cn->strings.s = cn->configuration; |
| 1353 | i++; |
| 1354 | } |
| 1355 | cfg->gstrings[i] = NULL; |
| 1356 | s = usb_gstrings_attach(&gi->cdev, cfg->gstrings, 1); |
Wei Yongjun | fea7707 | 2013-05-07 19:50:31 +0800 | [diff] [blame] | 1357 | if (IS_ERR(s)) { |
| 1358 | ret = PTR_ERR(s); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1359 | goto err_comp_cleanup; |
Wei Yongjun | fea7707 | 2013-05-07 19:50:31 +0800 | [diff] [blame] | 1360 | } |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1361 | c->iConfiguration = s[0].id; |
| 1362 | } |
| 1363 | |
| 1364 | list_for_each_entry_safe(f, tmp, &cfg->func_list, list) { |
| 1365 | list_del(&f->list); |
| 1366 | ret = usb_add_function(c, f); |
Andrzej Pietrasiewicz | 5a68e9b | 2013-08-08 09:43:28 +0200 | [diff] [blame] | 1367 | if (ret) { |
| 1368 | list_add(&f->list, &cfg->func_list); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1369 | goto err_purge_funcs; |
Andrzej Pietrasiewicz | 5a68e9b | 2013-08-08 09:43:28 +0200 | [diff] [blame] | 1370 | } |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1371 | } |
| 1372 | usb_ep_autoconfig_reset(cdev->gadget); |
| 1373 | } |
Andrzej Pietrasiewicz | da42431 | 2014-05-08 14:06:26 +0200 | [diff] [blame] | 1374 | if (cdev->use_os_string) { |
| 1375 | ret = composite_os_desc_req_prepare(cdev, gadget->ep0); |
| 1376 | if (ret) |
| 1377 | goto err_purge_funcs; |
| 1378 | } |
| 1379 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1380 | usb_ep_autoconfig_reset(cdev->gadget); |
| 1381 | return 0; |
| 1382 | |
| 1383 | err_purge_funcs: |
| 1384 | purge_configs_funcs(gi); |
| 1385 | err_comp_cleanup: |
| 1386 | composite_dev_cleanup(cdev); |
| 1387 | return ret; |
| 1388 | } |
| 1389 | |
Badhri Jagan Sridharan | 2187738 | 2014-12-15 10:44:47 -0800 | [diff] [blame^] | 1390 | #ifdef CONFIG_USB_CONFIGFS_UEVENT |
| 1391 | static void android_work(struct work_struct *data) |
| 1392 | { |
| 1393 | struct gadget_info *gi = container_of(data, struct gadget_info, work); |
| 1394 | struct usb_composite_dev *cdev = &gi->cdev; |
| 1395 | char *disconnected[2] = { "USB_STATE=DISCONNECTED", NULL }; |
| 1396 | char *connected[2] = { "USB_STATE=CONNECTED", NULL }; |
| 1397 | char *configured[2] = { "USB_STATE=CONFIGURED", NULL }; |
| 1398 | /* 0-connected 1-configured 2-disconnected*/ |
| 1399 | bool status[3] = { false, false, false }; |
| 1400 | unsigned long flags; |
| 1401 | bool uevent_sent = false; |
| 1402 | |
| 1403 | spin_lock_irqsave(&cdev->lock, flags); |
| 1404 | if (cdev->config) |
| 1405 | status[1] = true; |
| 1406 | |
| 1407 | if (gi->connected != gi->sw_connected) { |
| 1408 | if (gi->connected) |
| 1409 | status[0] = true; |
| 1410 | else |
| 1411 | status[2] = true; |
| 1412 | gi->sw_connected = gi->connected; |
| 1413 | } |
| 1414 | spin_unlock_irqrestore(&cdev->lock, flags); |
| 1415 | |
| 1416 | if (status[0]) { |
| 1417 | kobject_uevent_env(&gi->dev->kobj, KOBJ_CHANGE, connected); |
| 1418 | pr_info("%s: sent uevent %s\n", __func__, connected[0]); |
| 1419 | uevent_sent = true; |
| 1420 | } |
| 1421 | |
| 1422 | if (status[1]) { |
| 1423 | kobject_uevent_env(&gi->dev->kobj, KOBJ_CHANGE, configured); |
| 1424 | pr_info("%s: sent uevent %s\n", __func__, configured[0]); |
| 1425 | uevent_sent = true; |
| 1426 | } |
| 1427 | |
| 1428 | if (status[2]) { |
| 1429 | kobject_uevent_env(&gi->dev->kobj, KOBJ_CHANGE, disconnected); |
| 1430 | pr_info("%s: sent uevent %s\n", __func__, disconnected[0]); |
| 1431 | uevent_sent = true; |
| 1432 | } |
| 1433 | |
| 1434 | if (!uevent_sent) { |
| 1435 | pr_info("%s: did not send uevent (%d %d %p)\n", __func__, |
| 1436 | gi->connected, gi->sw_connected, cdev->config); |
| 1437 | } |
| 1438 | } |
| 1439 | #endif |
| 1440 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1441 | static void configfs_composite_unbind(struct usb_gadget *gadget) |
| 1442 | { |
| 1443 | struct usb_composite_dev *cdev; |
| 1444 | struct gadget_info *gi; |
| 1445 | |
| 1446 | /* the gi->lock is hold by the caller */ |
| 1447 | |
| 1448 | cdev = get_gadget_data(gadget); |
| 1449 | gi = container_of(cdev, struct gadget_info, cdev); |
| 1450 | |
Li Jun | 41ce84c | 2015-07-09 15:18:48 +0800 | [diff] [blame] | 1451 | kfree(otg_desc[0]); |
| 1452 | otg_desc[0] = NULL; |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1453 | purge_configs_funcs(gi); |
| 1454 | composite_dev_cleanup(cdev); |
| 1455 | usb_ep_autoconfig_reset(cdev->gadget); |
| 1456 | cdev->gadget = NULL; |
| 1457 | set_gadget_data(gadget, NULL); |
| 1458 | } |
| 1459 | |
Badhri Jagan Sridharan | 2187738 | 2014-12-15 10:44:47 -0800 | [diff] [blame^] | 1460 | #ifdef CONFIG_USB_CONFIGFS_UEVENT |
| 1461 | static int android_setup(struct usb_gadget *gadget, |
| 1462 | const struct usb_ctrlrequest *c) |
| 1463 | { |
| 1464 | struct usb_composite_dev *cdev = get_gadget_data(gadget); |
| 1465 | unsigned long flags; |
| 1466 | struct gadget_info *gi = container_of(cdev, struct gadget_info, cdev); |
| 1467 | int value = -EOPNOTSUPP; |
| 1468 | struct usb_function_instance *fi; |
| 1469 | |
| 1470 | spin_lock_irqsave(&cdev->lock, flags); |
| 1471 | if (!gi->connected) { |
| 1472 | gi->connected = 1; |
| 1473 | schedule_work(&gi->work); |
| 1474 | } |
| 1475 | spin_unlock_irqrestore(&cdev->lock, flags); |
| 1476 | list_for_each_entry(fi, &gi->available_func, cfs_list) { |
| 1477 | if (fi != NULL && fi->f != NULL && fi->f->setup != NULL) { |
| 1478 | value = fi->f->setup(fi->f, c); |
| 1479 | if (value >= 0) |
| 1480 | break; |
| 1481 | } |
| 1482 | } |
| 1483 | |
| 1484 | #ifdef CONFIG_USB_CONFIGFS_F_ACC |
| 1485 | if (value < 0) |
| 1486 | value = acc_ctrlrequest(cdev, c); |
| 1487 | #endif |
| 1488 | |
| 1489 | if (value < 0) |
| 1490 | value = composite_setup(gadget, c); |
| 1491 | |
| 1492 | spin_lock_irqsave(&cdev->lock, flags); |
| 1493 | if (c->bRequest == USB_REQ_SET_CONFIGURATION && |
| 1494 | cdev->config) { |
| 1495 | schedule_work(&gi->work); |
| 1496 | } |
| 1497 | spin_unlock_irqrestore(&cdev->lock, flags); |
| 1498 | |
| 1499 | return value; |
| 1500 | } |
| 1501 | |
| 1502 | static void android_disconnect(struct usb_gadget *gadget) |
| 1503 | { |
| 1504 | struct usb_composite_dev *cdev = get_gadget_data(gadget); |
| 1505 | struct gadget_info *gi = container_of(cdev, struct gadget_info, cdev); |
| 1506 | |
| 1507 | /* accessory HID support can be active while the |
| 1508 | accessory function is not actually enabled, |
| 1509 | so we need to inform it when we are disconnected. |
| 1510 | */ |
| 1511 | |
| 1512 | #ifdef CONFIG_USB_CONFIGFS_F_ACC |
| 1513 | acc_disconnect(); |
| 1514 | #endif |
| 1515 | gi->connected = 0; |
| 1516 | schedule_work(&gi->work); |
| 1517 | composite_disconnect(gadget); |
| 1518 | } |
| 1519 | #endif |
| 1520 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1521 | static const struct usb_gadget_driver configfs_driver_template = { |
| 1522 | .bind = configfs_composite_bind, |
| 1523 | .unbind = configfs_composite_unbind, |
Badhri Jagan Sridharan | 2187738 | 2014-12-15 10:44:47 -0800 | [diff] [blame^] | 1524 | #ifdef CONFIG_USB_CONFIGFS_UEVENT |
| 1525 | .setup = android_setup, |
| 1526 | .disconnect = android_disconnect, |
| 1527 | #else |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1528 | .setup = composite_setup, |
Peter Chen | 02f751b | 2014-09-09 08:56:50 +0800 | [diff] [blame] | 1529 | .reset = composite_disconnect, |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1530 | .disconnect = composite_disconnect, |
Badhri Jagan Sridharan | 2187738 | 2014-12-15 10:44:47 -0800 | [diff] [blame^] | 1531 | #endif |
Andrzej Pietrasiewicz | 3a57187 | 2014-10-08 12:03:36 +0200 | [diff] [blame] | 1532 | .suspend = composite_suspend, |
| 1533 | .resume = composite_resume, |
| 1534 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1535 | .max_speed = USB_SPEED_SUPER, |
| 1536 | .driver = { |
| 1537 | .owner = THIS_MODULE, |
| 1538 | .name = "configfs-gadget", |
| 1539 | }, |
Krzysztof Opasiak | f1bddbb | 2016-05-05 10:46:05 +0200 | [diff] [blame] | 1540 | .match_existing_only = 1, |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1541 | }; |
| 1542 | |
| 1543 | static struct config_group *gadgets_make( |
| 1544 | struct config_group *group, |
| 1545 | const char *name) |
| 1546 | { |
| 1547 | struct gadget_info *gi; |
| 1548 | |
| 1549 | gi = kzalloc(sizeof(*gi), GFP_KERNEL); |
| 1550 | if (!gi) |
| 1551 | return ERR_PTR(-ENOMEM); |
| 1552 | |
Christoph Hellwig | 1ae1602 | 2016-02-26 11:02:14 +0100 | [diff] [blame] | 1553 | config_group_init_type_name(&gi->group, name, &gadget_root_type); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1554 | |
| 1555 | config_group_init_type_name(&gi->functions_group, "functions", |
| 1556 | &functions_type); |
Christoph Hellwig | 1ae1602 | 2016-02-26 11:02:14 +0100 | [diff] [blame] | 1557 | configfs_add_default_group(&gi->functions_group, &gi->group); |
| 1558 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1559 | config_group_init_type_name(&gi->configs_group, "configs", |
| 1560 | &config_desc_type); |
Christoph Hellwig | 1ae1602 | 2016-02-26 11:02:14 +0100 | [diff] [blame] | 1561 | configfs_add_default_group(&gi->configs_group, &gi->group); |
| 1562 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1563 | config_group_init_type_name(&gi->strings_group, "strings", |
| 1564 | &gadget_strings_strings_type); |
Christoph Hellwig | 1ae1602 | 2016-02-26 11:02:14 +0100 | [diff] [blame] | 1565 | configfs_add_default_group(&gi->strings_group, &gi->group); |
| 1566 | |
Andrzej Pietrasiewicz | 87213d3 | 2014-05-08 14:06:25 +0200 | [diff] [blame] | 1567 | config_group_init_type_name(&gi->os_desc_group, "os_desc", |
| 1568 | &os_desc_type); |
Christoph Hellwig | 1ae1602 | 2016-02-26 11:02:14 +0100 | [diff] [blame] | 1569 | configfs_add_default_group(&gi->os_desc_group, &gi->group); |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1570 | |
| 1571 | gi->composite.bind = configfs_do_nothing; |
| 1572 | gi->composite.unbind = configfs_do_nothing; |
| 1573 | gi->composite.suspend = NULL; |
| 1574 | gi->composite.resume = NULL; |
| 1575 | gi->composite.max_speed = USB_SPEED_SUPER; |
| 1576 | |
| 1577 | mutex_init(&gi->lock); |
| 1578 | INIT_LIST_HEAD(&gi->string_list); |
| 1579 | INIT_LIST_HEAD(&gi->available_func); |
| 1580 | |
| 1581 | composite_init_dev(&gi->cdev); |
| 1582 | gi->cdev.desc.bLength = USB_DT_DEVICE_SIZE; |
| 1583 | gi->cdev.desc.bDescriptorType = USB_DT_DEVICE; |
| 1584 | gi->cdev.desc.bcdDevice = cpu_to_le16(get_default_bcdDevice()); |
| 1585 | |
| 1586 | gi->composite.gadget_driver = configfs_driver_template; |
| 1587 | |
| 1588 | gi->composite.gadget_driver.function = kstrdup(name, GFP_KERNEL); |
| 1589 | gi->composite.name = gi->composite.gadget_driver.function; |
| 1590 | |
Badhri Jagan Sridharan | 2187738 | 2014-12-15 10:44:47 -0800 | [diff] [blame^] | 1591 | #ifdef CONFIG_USB_CONFIGFS_UEVENT |
| 1592 | INIT_WORK(&gi->work, android_work); |
| 1593 | gi->dev = device_create(android_class, NULL, |
| 1594 | MKDEV(0, 0), NULL, "android0"); |
| 1595 | #endif |
| 1596 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1597 | if (!gi->composite.gadget_driver.function) |
| 1598 | goto err; |
| 1599 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1600 | return &gi->group; |
| 1601 | err: |
| 1602 | kfree(gi); |
| 1603 | return ERR_PTR(-ENOMEM); |
| 1604 | } |
| 1605 | |
| 1606 | static void gadgets_drop(struct config_group *group, struct config_item *item) |
| 1607 | { |
| 1608 | config_item_put(item); |
| 1609 | } |
| 1610 | |
| 1611 | static struct configfs_group_operations gadgets_ops = { |
| 1612 | .make_group = &gadgets_make, |
| 1613 | .drop_item = &gadgets_drop, |
| 1614 | }; |
| 1615 | |
| 1616 | static struct config_item_type gadgets_type = { |
| 1617 | .ct_group_ops = &gadgets_ops, |
| 1618 | .ct_owner = THIS_MODULE, |
| 1619 | }; |
| 1620 | |
| 1621 | static struct configfs_subsystem gadget_subsys = { |
| 1622 | .su_group = { |
| 1623 | .cg_item = { |
| 1624 | .ci_namebuf = "usb_gadget", |
| 1625 | .ci_type = &gadgets_type, |
| 1626 | }, |
| 1627 | }, |
| 1628 | .su_mutex = __MUTEX_INITIALIZER(gadget_subsys.su_mutex), |
| 1629 | }; |
| 1630 | |
Andrzej Pietrasiewicz | 092a4bd | 2013-09-26 14:38:15 +0200 | [diff] [blame] | 1631 | void unregister_gadget_item(struct config_item *item) |
| 1632 | { |
| 1633 | struct gadget_info *gi = to_gadget_info(item); |
| 1634 | |
Winter Wang | cee51c3 | 2016-07-27 10:03:19 +0800 | [diff] [blame] | 1635 | mutex_lock(&gi->lock); |
Andrzej Pietrasiewicz | 092a4bd | 2013-09-26 14:38:15 +0200 | [diff] [blame] | 1636 | unregister_gadget(gi); |
Winter Wang | cee51c3 | 2016-07-27 10:03:19 +0800 | [diff] [blame] | 1637 | mutex_unlock(&gi->lock); |
Andrzej Pietrasiewicz | 092a4bd | 2013-09-26 14:38:15 +0200 | [diff] [blame] | 1638 | } |
Felipe Balbi | 0700faa | 2014-04-01 13:19:32 -0500 | [diff] [blame] | 1639 | EXPORT_SYMBOL_GPL(unregister_gadget_item); |
Andrzej Pietrasiewicz | 092a4bd | 2013-09-26 14:38:15 +0200 | [diff] [blame] | 1640 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1641 | static int __init gadget_cfs_init(void) |
| 1642 | { |
| 1643 | int ret; |
| 1644 | |
| 1645 | config_group_init(&gadget_subsys.su_group); |
| 1646 | |
| 1647 | ret = configfs_register_subsystem(&gadget_subsys); |
Badhri Jagan Sridharan | 2187738 | 2014-12-15 10:44:47 -0800 | [diff] [blame^] | 1648 | |
| 1649 | #ifdef CONFIG_USB_CONFIGFS_UEVENT |
| 1650 | android_class = class_create(THIS_MODULE, "android_usb"); |
| 1651 | if (IS_ERR(android_class)) |
| 1652 | return PTR_ERR(android_class); |
| 1653 | #endif |
| 1654 | |
Sebastian Andrzej Siewior | 88af8bb | 2012-12-23 21:10:24 +0100 | [diff] [blame] | 1655 | return ret; |
| 1656 | } |
| 1657 | module_init(gadget_cfs_init); |
| 1658 | |
| 1659 | static void __exit gadget_cfs_exit(void) |
| 1660 | { |
| 1661 | configfs_unregister_subsystem(&gadget_subsys); |
| 1662 | } |
| 1663 | module_exit(gadget_cfs_exit); |