1 /* 2 * composite.h -- framework for usb gadgets which are composite devices 3 * 4 * Copyright (C) 2006-2008 David Brownell 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is distributed in the hope that it will be useful, 12 * but WITHOUT ANY WARRANTY; without even the implied warranty of 13 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 14 * GNU General Public License for more details. 15 * 16 * You should have received a copy of the GNU General Public License 17 * along with this program; if not, write to the Free Software 18 * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA 19 */ 20 21 #ifndef __LINUX_USB_COMPOSITE_H 22 #define __LINUX_USB_COMPOSITE_H 23 24 /* 25 * This framework is an optional layer on top of the USB Gadget interface, 26 * making it easier to build (a) Composite devices, supporting multiple 27 * functions within any single configuration, and (b) Multi-configuration 28 * devices, also supporting multiple functions but without necessarily 29 * having more than one function per configuration. 30 * 31 * Example: a device with a single configuration supporting both network 32 * link and mass storage functions is a composite device. Those functions 33 * might alternatively be packaged in individual configurations, but in 34 * the composite model the host can use both functions at the same time. 35 */ 36 37 #include <linux/bcd.h> 38 #include <linux/version.h> 39 #include <linux/usb/ch9.h> 40 #include <linux/usb/gadget.h> 41 #include <linux/log2.h> 42 #include <linux/configfs.h> 43 44 /* 45 * USB function drivers should return USB_GADGET_DELAYED_STATUS if they 46 * wish to delay the data/status stages of the control transfer till they 47 * are ready. The control transfer will then be kept from completing till 48 * all the function drivers that requested for USB_GADGET_DELAYED_STAUS 49 * invoke usb_composite_setup_continue(). 50 */ 51 #define USB_GADGET_DELAYED_STATUS 0x7fff /* Impossibly large value */ 52 53 /* big enough to hold our biggest descriptor */ 54 #define USB_COMP_EP0_BUFSIZ 1024 55 56 #define USB_MS_TO_HS_INTERVAL(x) (ilog2((x * 1000 / 125)) + 1) 57 struct usb_configuration; 58 59 /** 60 * struct usb_os_desc_ext_prop - describes one "Extended Property" 61 * @entry: used to keep a list of extended properties 62 * @type: Extended Property type 63 * @name_len: Extended Property unicode name length, including terminating '\0' 64 * @name: Extended Property name 65 * @data_len: Length of Extended Property blob (for unicode store double len) 66 * @data: Extended Property blob 67 * @item: Represents this Extended Property in configfs 68 */ 69 struct usb_os_desc_ext_prop { 70 struct list_head entry; 71 u8 type; 72 int name_len; 73 char *name; 74 int data_len; 75 char *data; 76 struct config_item item; 77 }; 78 79 /** 80 * struct usb_os_desc - describes OS descriptors associated with one interface 81 * @ext_compat_id: 16 bytes of "Compatible ID" and "Subcompatible ID" 82 * @ext_prop: Extended Properties list 83 * @ext_prop_len: Total length of Extended Properties blobs 84 * @ext_prop_count: Number of Extended Properties 85 * @opts_mutex: Optional mutex protecting config data of a usb_function_instance 86 * @group: Represents OS descriptors associated with an interface in configfs 87 * @owner: Module associated with this OS descriptor 88 */ 89 struct usb_os_desc { 90 char *ext_compat_id; 91 struct list_head ext_prop; 92 int ext_prop_len; 93 int ext_prop_count; 94 struct mutex *opts_mutex; 95 struct config_group group; 96 struct module *owner; 97 }; 98 99 /** 100 * struct usb_os_desc_table - describes OS descriptors associated with one 101 * interface of a usb_function 102 * @if_id: Interface id 103 * @os_desc: "Extended Compatibility ID" and "Extended Properties" of the 104 * interface 105 * 106 * Each interface can have at most one "Extended Compatibility ID" and a 107 * number of "Extended Properties". 108 */ 109 struct usb_os_desc_table { 110 int if_id; 111 struct usb_os_desc *os_desc; 112 }; 113 114 /** 115 * struct usb_function - describes one function of a configuration 116 * @name: For diagnostics, identifies the function. 117 * @strings: tables of strings, keyed by identifiers assigned during bind() 118 * and by language IDs provided in control requests 119 * @fs_descriptors: Table of full (or low) speed descriptors, using interface and 120 * string identifiers assigned during @bind(). If this pointer is null, 121 * the function will not be available at full speed (or at low speed). 122 * @hs_descriptors: Table of high speed descriptors, using interface and 123 * string identifiers assigned during @bind(). If this pointer is null, 124 * the function will not be available at high speed. 125 * @ss_descriptors: Table of super speed descriptors, using interface and 126 * string identifiers assigned during @bind(). If this 127 * pointer is null after initiation, the function will not 128 * be available at super speed. 129 * @config: assigned when @usb_add_function() is called; this is the 130 * configuration with which this function is associated. 131 * @os_desc_table: Table of (interface id, os descriptors) pairs. The function 132 * can expose more than one interface. If an interface is a member of 133 * an IAD, only the first interface of IAD has its entry in the table. 134 * @os_desc_n: Number of entries in os_desc_table 135 * @bind: Before the gadget can register, all of its functions bind() to the 136 * available resources including string and interface identifiers used 137 * in interface or class descriptors; endpoints; I/O buffers; and so on. 138 * @unbind: Reverses @bind; called as a side effect of unregistering the 139 * driver which added this function. 140 * @free_func: free the struct usb_function. 141 * @mod: (internal) points to the module that created this structure. 142 * @set_alt: (REQUIRED) Reconfigures altsettings; function drivers may 143 * initialize usb_ep.driver data at this time (when it is used). 144 * Note that setting an interface to its current altsetting resets 145 * interface state, and that all interfaces have a disabled state. 146 * @get_alt: Returns the active altsetting. If this is not provided, 147 * then only altsetting zero is supported. 148 * @disable: (REQUIRED) Indicates the function should be disabled. Reasons 149 * include host resetting or reconfiguring the gadget, and disconnection. 150 * @setup: Used for interface-specific control requests. 151 * @suspend: Notifies functions when the host stops sending USB traffic. 152 * @resume: Notifies functions when the host restarts USB traffic. 153 * @get_status: Returns function status as a reply to 154 * GetStatus() request when the recipient is Interface. 155 * @func_suspend: callback to be called when 156 * SetFeature(FUNCTION_SUSPEND) is reseived 157 * 158 * A single USB function uses one or more interfaces, and should in most 159 * cases support operation at both full and high speeds. Each function is 160 * associated by @usb_add_function() with a one configuration; that function 161 * causes @bind() to be called so resources can be allocated as part of 162 * setting up a gadget driver. Those resources include endpoints, which 163 * should be allocated using @usb_ep_autoconfig(). 164 * 165 * To support dual speed operation, a function driver provides descriptors 166 * for both high and full speed operation. Except in rare cases that don't 167 * involve bulk endpoints, each speed needs different endpoint descriptors. 168 * 169 * Function drivers choose their own strategies for managing instance data. 170 * The simplest strategy just declares it "static', which means the function 171 * can only be activated once. If the function needs to be exposed in more 172 * than one configuration at a given speed, it needs to support multiple 173 * usb_function structures (one for each configuration). 174 * 175 * A more complex strategy might encapsulate a @usb_function structure inside 176 * a driver-specific instance structure to allows multiple activations. An 177 * example of multiple activations might be a CDC ACM function that supports 178 * two or more distinct instances within the same configuration, providing 179 * several independent logical data links to a USB host. 180 */ 181 182 struct usb_function { 183 const char *name; 184 struct usb_gadget_strings **strings; 185 struct usb_descriptor_header **fs_descriptors; 186 struct usb_descriptor_header **hs_descriptors; 187 struct usb_descriptor_header **ss_descriptors; 188 189 struct usb_configuration *config; 190 191 struct usb_os_desc_table *os_desc_table; 192 unsigned os_desc_n; 193 194 /* REVISIT: bind() functions can be marked __init, which 195 * makes trouble for section mismatch analysis. See if 196 * we can't restructure things to avoid mismatching. 197 * Related: unbind() may kfree() but bind() won't... 198 */ 199 200 /* configuration management: bind/unbind */ 201 int (*bind)(struct usb_configuration *, 202 struct usb_function *); 203 void (*unbind)(struct usb_configuration *, 204 struct usb_function *); 205 void (*free_func)(struct usb_function *f); 206 struct module *mod; 207 208 /* runtime state management */ 209 int (*set_alt)(struct usb_function *, 210 unsigned interface, unsigned alt); 211 int (*get_alt)(struct usb_function *, 212 unsigned interface); 213 void (*disable)(struct usb_function *); 214 int (*setup)(struct usb_function *, 215 const struct usb_ctrlrequest *); 216 void (*suspend)(struct usb_function *); 217 void (*resume)(struct usb_function *); 218 219 /* USB 3.0 additions */ 220 int (*get_status)(struct usb_function *); 221 int (*func_suspend)(struct usb_function *, 222 u8 suspend_opt); 223 /* private: */ 224 /* internals */ 225 struct list_head list; 226 DECLARE_BITMAP(endpoints, 32); 227 const struct usb_function_instance *fi; 228 }; 229 230 int usb_add_function(struct usb_configuration *, struct usb_function *); 231 232 int usb_function_deactivate(struct usb_function *); 233 int usb_function_activate(struct usb_function *); 234 235 int usb_interface_id(struct usb_configuration *, struct usb_function *); 236 237 int config_ep_by_speed(struct usb_gadget *g, struct usb_function *f, 238 struct usb_ep *_ep); 239 240 #define MAX_CONFIG_INTERFACES 16 /* arbitrary; max 255 */ 241 242 /** 243 * struct usb_configuration - represents one gadget configuration 244 * @label: For diagnostics, describes the configuration. 245 * @strings: Tables of strings, keyed by identifiers assigned during @bind() 246 * and by language IDs provided in control requests. 247 * @descriptors: Table of descriptors preceding all function descriptors. 248 * Examples include OTG and vendor-specific descriptors. 249 * @unbind: Reverses @bind; called as a side effect of unregistering the 250 * driver which added this configuration. 251 * @setup: Used to delegate control requests that aren't handled by standard 252 * device infrastructure or directed at a specific interface. 253 * @bConfigurationValue: Copied into configuration descriptor. 254 * @iConfiguration: Copied into configuration descriptor. 255 * @bmAttributes: Copied into configuration descriptor. 256 * @MaxPower: Power consumtion in mA. Used to compute bMaxPower in the 257 * configuration descriptor after considering the bus speed. 258 * @cdev: assigned by @usb_add_config() before calling @bind(); this is 259 * the device associated with this configuration. 260 * 261 * Configurations are building blocks for gadget drivers structured around 262 * function drivers. Simple USB gadgets require only one function and one 263 * configuration, and handle dual-speed hardware by always providing the same 264 * functionality. Slightly more complex gadgets may have more than one 265 * single-function configuration at a given speed; or have configurations 266 * that only work at one speed. 267 * 268 * Composite devices are, by definition, ones with configurations which 269 * include more than one function. 270 * 271 * The lifecycle of a usb_configuration includes allocation, initialization 272 * of the fields described above, and calling @usb_add_config() to set up 273 * internal data and bind it to a specific device. The configuration's 274 * @bind() method is then used to initialize all the functions and then 275 * call @usb_add_function() for them. 276 * 277 * Those functions would normally be independent of each other, but that's 278 * not mandatory. CDC WMC devices are an example where functions often 279 * depend on other functions, with some functions subsidiary to others. 280 * Such interdependency may be managed in any way, so long as all of the 281 * descriptors complete by the time the composite driver returns from 282 * its bind() routine. 283 */ 284 struct usb_configuration { 285 const char *label; 286 struct usb_gadget_strings **strings; 287 const struct usb_descriptor_header **descriptors; 288 289 /* REVISIT: bind() functions can be marked __init, which 290 * makes trouble for section mismatch analysis. See if 291 * we can't restructure things to avoid mismatching... 292 */ 293 294 /* configuration management: unbind/setup */ 295 void (*unbind)(struct usb_configuration *); 296 int (*setup)(struct usb_configuration *, 297 const struct usb_ctrlrequest *); 298 299 /* fields in the config descriptor */ 300 u8 bConfigurationValue; 301 u8 iConfiguration; 302 u8 bmAttributes; 303 u16 MaxPower; 304 305 struct usb_composite_dev *cdev; 306 307 /* private: */ 308 /* internals */ 309 struct list_head list; 310 struct list_head functions; 311 u8 next_interface_id; 312 unsigned superspeed:1; 313 unsigned highspeed:1; 314 unsigned fullspeed:1; 315 struct usb_function *interface[MAX_CONFIG_INTERFACES]; 316 }; 317 318 int usb_add_config(struct usb_composite_dev *, 319 struct usb_configuration *, 320 int (*)(struct usb_configuration *)); 321 322 void usb_remove_config(struct usb_composite_dev *, 323 struct usb_configuration *); 324 325 /* predefined index for usb_composite_driver */ 326 enum { 327 USB_GADGET_MANUFACTURER_IDX = 0, 328 USB_GADGET_PRODUCT_IDX, 329 USB_GADGET_SERIAL_IDX, 330 USB_GADGET_FIRST_AVAIL_IDX, 331 }; 332 333 /** 334 * struct usb_composite_driver - groups configurations into a gadget 335 * @name: For diagnostics, identifies the driver. 336 * @dev: Template descriptor for the device, including default device 337 * identifiers. 338 * @strings: tables of strings, keyed by identifiers assigned during @bind 339 * and language IDs provided in control requests. Note: The first entries 340 * are predefined. The first entry that may be used is 341 * USB_GADGET_FIRST_AVAIL_IDX 342 * @max_speed: Highest speed the driver supports. 343 * @needs_serial: set to 1 if the gadget needs userspace to provide 344 * a serial number. If one is not provided, warning will be printed. 345 * @bind: (REQUIRED) Used to allocate resources that are shared across the 346 * whole device, such as string IDs, and add its configurations using 347 * @usb_add_config(). This may fail by returning a negative errno 348 * value; it should return zero on successful initialization. 349 * @unbind: Reverses @bind; called as a side effect of unregistering 350 * this driver. 351 * @disconnect: optional driver disconnect method 352 * @suspend: Notifies when the host stops sending USB traffic, 353 * after function notifications 354 * @resume: Notifies configuration when the host restarts USB traffic, 355 * before function notifications 356 * @gadget_driver: Gadget driver controlling this driver 357 * 358 * Devices default to reporting self powered operation. Devices which rely 359 * on bus powered operation should report this in their @bind method. 360 * 361 * Before returning from @bind, various fields in the template descriptor 362 * may be overridden. These include the idVendor/idProduct/bcdDevice values 363 * normally to bind the appropriate host side driver, and the three strings 364 * (iManufacturer, iProduct, iSerialNumber) normally used to provide user 365 * meaningful device identifiers. (The strings will not be defined unless 366 * they are defined in @dev and @strings.) The correct ep0 maxpacket size 367 * is also reported, as defined by the underlying controller driver. 368 */ 369 struct usb_composite_driver { 370 const char *name; 371 const struct usb_device_descriptor *dev; 372 struct usb_gadget_strings **strings; 373 enum usb_device_speed max_speed; 374 unsigned needs_serial:1; 375 376 int (*bind)(struct usb_composite_dev *cdev); 377 int (*unbind)(struct usb_composite_dev *); 378 379 void (*disconnect)(struct usb_composite_dev *); 380 381 /* global suspend hooks */ 382 void (*suspend)(struct usb_composite_dev *); 383 void (*resume)(struct usb_composite_dev *); 384 struct usb_gadget_driver gadget_driver; 385 }; 386 387 extern int usb_composite_probe(struct usb_composite_driver *driver); 388 extern void usb_composite_unregister(struct usb_composite_driver *driver); 389 390 /** 391 * module_usb_composite_driver() - Helper macro for registering a USB gadget 392 * composite driver 393 * @__usb_composite_driver: usb_composite_driver struct 394 * 395 * Helper macro for USB gadget composite drivers which do not do anything 396 * special in module init/exit. This eliminates a lot of boilerplate. Each 397 * module may only use this macro once, and calling it replaces module_init() 398 * and module_exit() 399 */ 400 #define module_usb_composite_driver(__usb_composite_driver) \ 401 module_driver(__usb_composite_driver, usb_composite_probe, \ 402 usb_composite_unregister) 403 404 extern void usb_composite_setup_continue(struct usb_composite_dev *cdev); 405 extern int composite_dev_prepare(struct usb_composite_driver *composite, 406 struct usb_composite_dev *cdev); 407 extern int composite_os_desc_req_prepare(struct usb_composite_dev *cdev, 408 struct usb_ep *ep0); 409 void composite_dev_cleanup(struct usb_composite_dev *cdev); 410 411 static inline struct usb_composite_driver *to_cdriver( 412 struct usb_gadget_driver *gdrv) 413 { 414 return container_of(gdrv, struct usb_composite_driver, gadget_driver); 415 } 416 417 #define OS_STRING_QW_SIGN_LEN 14 418 #define OS_STRING_IDX 0xEE 419 420 /** 421 * struct usb_composite_device - represents one composite usb gadget 422 * @gadget: read-only, abstracts the gadget's usb peripheral controller 423 * @req: used for control responses; buffer is pre-allocated 424 * @os_desc_req: used for OS descriptors responses; buffer is pre-allocated 425 * @config: the currently active configuration 426 * @qw_sign: qwSignature part of the OS string 427 * @b_vendor_code: bMS_VendorCode part of the OS string 428 * @use_os_string: false by default, interested gadgets set it 429 * @os_desc_config: the configuration to be used with OS descriptors 430 * @setup_pending: true when setup request is queued but not completed 431 * @os_desc_pending: true when os_desc request is queued but not completed 432 * 433 * One of these devices is allocated and initialized before the 434 * associated device driver's bind() is called. 435 * 436 * OPEN ISSUE: it appears that some WUSB devices will need to be 437 * built by combining a normal (wired) gadget with a wireless one. 438 * This revision of the gadget framework should probably try to make 439 * sure doing that won't hurt too much. 440 * 441 * One notion for how to handle Wireless USB devices involves: 442 * (a) a second gadget here, discovery mechanism TBD, but likely 443 * needing separate "register/unregister WUSB gadget" calls; 444 * (b) updates to usb_gadget to include flags "is it wireless", 445 * "is it wired", plus (presumably in a wrapper structure) 446 * bandgroup and PHY info; 447 * (c) presumably a wireless_ep wrapping a usb_ep, and reporting 448 * wireless-specific parameters like maxburst and maxsequence; 449 * (d) configurations that are specific to wireless links; 450 * (e) function drivers that understand wireless configs and will 451 * support wireless for (additional) function instances; 452 * (f) a function to support association setup (like CBAF), not 453 * necessarily requiring a wireless adapter; 454 * (g) composite device setup that can create one or more wireless 455 * configs, including appropriate association setup support; 456 * (h) more, TBD. 457 */ 458 struct usb_composite_dev { 459 struct usb_gadget *gadget; 460 struct usb_request *req; 461 struct usb_request *os_desc_req; 462 463 struct usb_configuration *config; 464 465 /* OS String is a custom (yet popular) extension to the USB standard. */ 466 u8 qw_sign[OS_STRING_QW_SIGN_LEN]; 467 u8 b_vendor_code; 468 struct usb_configuration *os_desc_config; 469 unsigned int use_os_string:1; 470 471 /* private: */ 472 /* internals */ 473 unsigned int suspended:1; 474 struct usb_device_descriptor desc; 475 struct list_head configs; 476 struct list_head gstrings; 477 struct usb_composite_driver *driver; 478 u8 next_string_id; 479 char *def_manufacturer; 480 481 /* the gadget driver won't enable the data pullup 482 * while the deactivation count is nonzero. 483 */ 484 unsigned deactivations; 485 486 /* the composite driver won't complete the control transfer's 487 * data/status stages till delayed_status is zero. 488 */ 489 int delayed_status; 490 491 /* protects deactivations and delayed_status counts*/ 492 spinlock_t lock; 493 494 unsigned setup_pending:1; 495 unsigned os_desc_pending:1; 496 }; 497 498 extern int usb_string_id(struct usb_composite_dev *c); 499 extern int usb_string_ids_tab(struct usb_composite_dev *c, 500 struct usb_string *str); 501 extern struct usb_string *usb_gstrings_attach(struct usb_composite_dev *cdev, 502 struct usb_gadget_strings **sp, unsigned n_strings); 503 504 extern int usb_string_ids_n(struct usb_composite_dev *c, unsigned n); 505 506 extern void composite_disconnect(struct usb_gadget *gadget); 507 extern int composite_setup(struct usb_gadget *gadget, 508 const struct usb_ctrlrequest *ctrl); 509 extern void composite_suspend(struct usb_gadget *gadget); 510 extern void composite_resume(struct usb_gadget *gadget); 511 512 /* 513 * Some systems will need runtime overrides for the product identifiers 514 * published in the device descriptor, either numbers or strings or both. 515 * String parameters are in UTF-8 (superset of ASCII's 7 bit characters). 516 */ 517 struct usb_composite_overwrite { 518 u16 idVendor; 519 u16 idProduct; 520 u16 bcdDevice; 521 char *serial_number; 522 char *manufacturer; 523 char *product; 524 }; 525 #define USB_GADGET_COMPOSITE_OPTIONS() \ 526 static struct usb_composite_overwrite coverwrite; \ 527 \ 528 module_param_named(idVendor, coverwrite.idVendor, ushort, S_IRUGO); \ 529 MODULE_PARM_DESC(idVendor, "USB Vendor ID"); \ 530 \ 531 module_param_named(idProduct, coverwrite.idProduct, ushort, S_IRUGO); \ 532 MODULE_PARM_DESC(idProduct, "USB Product ID"); \ 533 \ 534 module_param_named(bcdDevice, coverwrite.bcdDevice, ushort, S_IRUGO); \ 535 MODULE_PARM_DESC(bcdDevice, "USB Device version (BCD)"); \ 536 \ 537 module_param_named(iSerialNumber, coverwrite.serial_number, charp, \ 538 S_IRUGO); \ 539 MODULE_PARM_DESC(iSerialNumber, "SerialNumber string"); \ 540 \ 541 module_param_named(iManufacturer, coverwrite.manufacturer, charp, \ 542 S_IRUGO); \ 543 MODULE_PARM_DESC(iManufacturer, "USB Manufacturer string"); \ 544 \ 545 module_param_named(iProduct, coverwrite.product, charp, S_IRUGO); \ 546 MODULE_PARM_DESC(iProduct, "USB Product string") 547 548 void usb_composite_overwrite_options(struct usb_composite_dev *cdev, 549 struct usb_composite_overwrite *covr); 550 551 static inline u16 get_default_bcdDevice(void) 552 { 553 u16 bcdDevice; 554 555 bcdDevice = bin2bcd((LINUX_VERSION_CODE >> 16 & 0xff)) << 8; 556 bcdDevice |= bin2bcd((LINUX_VERSION_CODE >> 8 & 0xff)); 557 return bcdDevice; 558 } 559 560 struct usb_function_driver { 561 const char *name; 562 struct module *mod; 563 struct list_head list; 564 struct usb_function_instance *(*alloc_inst)(void); 565 struct usb_function *(*alloc_func)(struct usb_function_instance *inst); 566 }; 567 568 struct usb_function_instance { 569 struct config_group group; 570 struct list_head cfs_list; 571 struct usb_function_driver *fd; 572 int (*set_inst_name)(struct usb_function_instance *inst, 573 const char *name); 574 void (*free_func_inst)(struct usb_function_instance *inst); 575 }; 576 577 void usb_function_unregister(struct usb_function_driver *f); 578 int usb_function_register(struct usb_function_driver *newf); 579 void usb_put_function_instance(struct usb_function_instance *fi); 580 void usb_put_function(struct usb_function *f); 581 struct usb_function_instance *usb_get_function_instance(const char *name); 582 struct usb_function *usb_get_function(struct usb_function_instance *fi); 583 584 struct usb_configuration *usb_get_config(struct usb_composite_dev *cdev, 585 int val); 586 int usb_add_config_only(struct usb_composite_dev *cdev, 587 struct usb_configuration *config); 588 void usb_remove_function(struct usb_configuration *c, struct usb_function *f); 589 590 #define DECLARE_USB_FUNCTION(_name, _inst_alloc, _func_alloc) \ 591 static struct usb_function_driver _name ## usb_func = { \ 592 .name = __stringify(_name), \ 593 .mod = THIS_MODULE, \ 594 .alloc_inst = _inst_alloc, \ 595 .alloc_func = _func_alloc, \ 596 }; \ 597 MODULE_ALIAS("usbfunc:"__stringify(_name)); 598 599 #define DECLARE_USB_FUNCTION_INIT(_name, _inst_alloc, _func_alloc) \ 600 DECLARE_USB_FUNCTION(_name, _inst_alloc, _func_alloc) \ 601 static int __init _name ## mod_init(void) \ 602 { \ 603 return usb_function_register(&_name ## usb_func); \ 604 } \ 605 static void __exit _name ## mod_exit(void) \ 606 { \ 607 usb_function_unregister(&_name ## usb_func); \ 608 } \ 609 module_init(_name ## mod_init); \ 610 module_exit(_name ## mod_exit) 611 612 /* messaging utils */ 613 #define DBG(d, fmt, args...) \ 614 dev_dbg(&(d)->gadget->dev , fmt , ## args) 615 #define VDBG(d, fmt, args...) \ 616 dev_vdbg(&(d)->gadget->dev , fmt , ## args) 617 #define ERROR(d, fmt, args...) \ 618 dev_err(&(d)->gadget->dev , fmt , ## args) 619 #define WARNING(d, fmt, args...) \ 620 dev_warn(&(d)->gadget->dev , fmt , ## args) 621 #define INFO(d, fmt, args...) \ 622 dev_info(&(d)->gadget->dev , fmt , ## args) 623 624 #endif /* __LINUX_USB_COMPOSITE_H */ 625