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) 57struct 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 */ 69struct 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 */ 89struct 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 */ 109struct 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 * @req_match: Tests if a given class request can be handled by this function. 152 * @suspend: Notifies functions when the host stops sending USB traffic. 153 * @resume: Notifies functions when the host restarts USB traffic. 154 * @get_status: Returns function status as a reply to 155 * GetStatus() request when the recipient is Interface. 156 * @func_suspend: callback to be called when 157 * SetFeature(FUNCTION_SUSPEND) is reseived 158 * 159 * A single USB function uses one or more interfaces, and should in most 160 * cases support operation at both full and high speeds. Each function is 161 * associated by @usb_add_function() with a one configuration; that function 162 * causes @bind() to be called so resources can be allocated as part of 163 * setting up a gadget driver. Those resources include endpoints, which 164 * should be allocated using @usb_ep_autoconfig(). 165 * 166 * To support dual speed operation, a function driver provides descriptors 167 * for both high and full speed operation. Except in rare cases that don't 168 * involve bulk endpoints, each speed needs different endpoint descriptors. 169 * 170 * Function drivers choose their own strategies for managing instance data. 171 * The simplest strategy just declares it "static', which means the function 172 * can only be activated once. If the function needs to be exposed in more 173 * than one configuration at a given speed, it needs to support multiple 174 * usb_function structures (one for each configuration). 175 * 176 * A more complex strategy might encapsulate a @usb_function structure inside 177 * a driver-specific instance structure to allows multiple activations. An 178 * example of multiple activations might be a CDC ACM function that supports 179 * two or more distinct instances within the same configuration, providing 180 * several independent logical data links to a USB host. 181 */ 182 183struct usb_function { 184 const char *name; 185 struct usb_gadget_strings **strings; 186 struct usb_descriptor_header **fs_descriptors; 187 struct usb_descriptor_header **hs_descriptors; 188 struct usb_descriptor_header **ss_descriptors; 189 190 struct usb_configuration *config; 191 192 struct usb_os_desc_table *os_desc_table; 193 unsigned os_desc_n; 194 195 /* REVISIT: bind() functions can be marked __init, which 196 * makes trouble for section mismatch analysis. See if 197 * we can't restructure things to avoid mismatching. 198 * Related: unbind() may kfree() but bind() won't... 199 */ 200 201 /* configuration management: bind/unbind */ 202 int (*bind)(struct usb_configuration *, 203 struct usb_function *); 204 void (*unbind)(struct usb_configuration *, 205 struct usb_function *); 206 void (*free_func)(struct usb_function *f); 207 struct module *mod; 208 209 /* runtime state management */ 210 int (*set_alt)(struct usb_function *, 211 unsigned interface, unsigned alt); 212 int (*get_alt)(struct usb_function *, 213 unsigned interface); 214 void (*disable)(struct usb_function *); 215 int (*setup)(struct usb_function *, 216 const struct usb_ctrlrequest *); 217 bool (*req_match)(struct usb_function *, 218 const struct usb_ctrlrequest *); 219 void (*suspend)(struct usb_function *); 220 void (*resume)(struct usb_function *); 221 222 /* USB 3.0 additions */ 223 int (*get_status)(struct usb_function *); 224 int (*func_suspend)(struct usb_function *, 225 u8 suspend_opt); 226 /* private: */ 227 /* internals */ 228 struct list_head list; 229 DECLARE_BITMAP(endpoints, 32); 230 const struct usb_function_instance *fi; 231 232 unsigned int bind_deactivated:1; 233}; 234 235int usb_add_function(struct usb_configuration *, struct usb_function *); 236 237int usb_function_deactivate(struct usb_function *); 238int usb_function_activate(struct usb_function *); 239 240int usb_interface_id(struct usb_configuration *, struct usb_function *); 241 242int config_ep_by_speed(struct usb_gadget *g, struct usb_function *f, 243 struct usb_ep *_ep); 244 245#define MAX_CONFIG_INTERFACES 16 /* arbitrary; max 255 */ 246 247/** 248 * struct usb_configuration - represents one gadget configuration 249 * @label: For diagnostics, describes the configuration. 250 * @strings: Tables of strings, keyed by identifiers assigned during @bind() 251 * and by language IDs provided in control requests. 252 * @descriptors: Table of descriptors preceding all function descriptors. 253 * Examples include OTG and vendor-specific descriptors. 254 * @unbind: Reverses @bind; called as a side effect of unregistering the 255 * driver which added this configuration. 256 * @setup: Used to delegate control requests that aren't handled by standard 257 * device infrastructure or directed at a specific interface. 258 * @bConfigurationValue: Copied into configuration descriptor. 259 * @iConfiguration: Copied into configuration descriptor. 260 * @bmAttributes: Copied into configuration descriptor. 261 * @MaxPower: Power consumtion in mA. Used to compute bMaxPower in the 262 * configuration descriptor after considering the bus speed. 263 * @cdev: assigned by @usb_add_config() before calling @bind(); this is 264 * the device associated with this configuration. 265 * 266 * Configurations are building blocks for gadget drivers structured around 267 * function drivers. Simple USB gadgets require only one function and one 268 * configuration, and handle dual-speed hardware by always providing the same 269 * functionality. Slightly more complex gadgets may have more than one 270 * single-function configuration at a given speed; or have configurations 271 * that only work at one speed. 272 * 273 * Composite devices are, by definition, ones with configurations which 274 * include more than one function. 275 * 276 * The lifecycle of a usb_configuration includes allocation, initialization 277 * of the fields described above, and calling @usb_add_config() to set up 278 * internal data and bind it to a specific device. The configuration's 279 * @bind() method is then used to initialize all the functions and then 280 * call @usb_add_function() for them. 281 * 282 * Those functions would normally be independent of each other, but that's 283 * not mandatory. CDC WMC devices are an example where functions often 284 * depend on other functions, with some functions subsidiary to others. 285 * Such interdependency may be managed in any way, so long as all of the 286 * descriptors complete by the time the composite driver returns from 287 * its bind() routine. 288 */ 289struct usb_configuration { 290 const char *label; 291 struct usb_gadget_strings **strings; 292 const struct usb_descriptor_header **descriptors; 293 294 /* REVISIT: bind() functions can be marked __init, which 295 * makes trouble for section mismatch analysis. See if 296 * we can't restructure things to avoid mismatching... 297 */ 298 299 /* configuration management: unbind/setup */ 300 void (*unbind)(struct usb_configuration *); 301 int (*setup)(struct usb_configuration *, 302 const struct usb_ctrlrequest *); 303 304 /* fields in the config descriptor */ 305 u8 bConfigurationValue; 306 u8 iConfiguration; 307 u8 bmAttributes; 308 u16 MaxPower; 309 310 struct usb_composite_dev *cdev; 311 312 /* private: */ 313 /* internals */ 314 struct list_head list; 315 struct list_head functions; 316 u8 next_interface_id; 317 unsigned superspeed:1; 318 unsigned highspeed:1; 319 unsigned fullspeed:1; 320 struct usb_function *interface[MAX_CONFIG_INTERFACES]; 321}; 322 323int usb_add_config(struct usb_composite_dev *, 324 struct usb_configuration *, 325 int (*)(struct usb_configuration *)); 326 327void usb_remove_config(struct usb_composite_dev *, 328 struct usb_configuration *); 329 330/* predefined index for usb_composite_driver */ 331enum { 332 USB_GADGET_MANUFACTURER_IDX = 0, 333 USB_GADGET_PRODUCT_IDX, 334 USB_GADGET_SERIAL_IDX, 335 USB_GADGET_FIRST_AVAIL_IDX, 336}; 337 338/** 339 * struct usb_composite_driver - groups configurations into a gadget 340 * @name: For diagnostics, identifies the driver. 341 * @dev: Template descriptor for the device, including default device 342 * identifiers. 343 * @strings: tables of strings, keyed by identifiers assigned during @bind 344 * and language IDs provided in control requests. Note: The first entries 345 * are predefined. The first entry that may be used is 346 * USB_GADGET_FIRST_AVAIL_IDX 347 * @max_speed: Highest speed the driver supports. 348 * @needs_serial: set to 1 if the gadget needs userspace to provide 349 * a serial number. If one is not provided, warning will be printed. 350 * @bind: (REQUIRED) Used to allocate resources that are shared across the 351 * whole device, such as string IDs, and add its configurations using 352 * @usb_add_config(). This may fail by returning a negative errno 353 * value; it should return zero on successful initialization. 354 * @unbind: Reverses @bind; called as a side effect of unregistering 355 * this driver. 356 * @disconnect: optional driver disconnect method 357 * @suspend: Notifies when the host stops sending USB traffic, 358 * after function notifications 359 * @resume: Notifies configuration when the host restarts USB traffic, 360 * before function notifications 361 * @gadget_driver: Gadget driver controlling this driver 362 * 363 * Devices default to reporting self powered operation. Devices which rely 364 * on bus powered operation should report this in their @bind method. 365 * 366 * Before returning from @bind, various fields in the template descriptor 367 * may be overridden. These include the idVendor/idProduct/bcdDevice values 368 * normally to bind the appropriate host side driver, and the three strings 369 * (iManufacturer, iProduct, iSerialNumber) normally used to provide user 370 * meaningful device identifiers. (The strings will not be defined unless 371 * they are defined in @dev and @strings.) The correct ep0 maxpacket size 372 * is also reported, as defined by the underlying controller driver. 373 */ 374struct usb_composite_driver { 375 const char *name; 376 const struct usb_device_descriptor *dev; 377 struct usb_gadget_strings **strings; 378 enum usb_device_speed max_speed; 379 unsigned needs_serial:1; 380 381 int (*bind)(struct usb_composite_dev *cdev); 382 int (*unbind)(struct usb_composite_dev *); 383 384 void (*disconnect)(struct usb_composite_dev *); 385 386 /* global suspend hooks */ 387 void (*suspend)(struct usb_composite_dev *); 388 void (*resume)(struct usb_composite_dev *); 389 struct usb_gadget_driver gadget_driver; 390}; 391 392extern int usb_composite_probe(struct usb_composite_driver *driver); 393extern void usb_composite_unregister(struct usb_composite_driver *driver); 394 395/** 396 * module_usb_composite_driver() - Helper macro for registering a USB gadget 397 * composite driver 398 * @__usb_composite_driver: usb_composite_driver struct 399 * 400 * Helper macro for USB gadget composite drivers which do not do anything 401 * special in module init/exit. This eliminates a lot of boilerplate. Each 402 * module may only use this macro once, and calling it replaces module_init() 403 * and module_exit() 404 */ 405#define module_usb_composite_driver(__usb_composite_driver) \ 406 module_driver(__usb_composite_driver, usb_composite_probe, \ 407 usb_composite_unregister) 408 409extern void usb_composite_setup_continue(struct usb_composite_dev *cdev); 410extern int composite_dev_prepare(struct usb_composite_driver *composite, 411 struct usb_composite_dev *cdev); 412extern int composite_os_desc_req_prepare(struct usb_composite_dev *cdev, 413 struct usb_ep *ep0); 414void composite_dev_cleanup(struct usb_composite_dev *cdev); 415 416static inline struct usb_composite_driver *to_cdriver( 417 struct usb_gadget_driver *gdrv) 418{ 419 return container_of(gdrv, struct usb_composite_driver, gadget_driver); 420} 421 422#define OS_STRING_QW_SIGN_LEN 14 423#define OS_STRING_IDX 0xEE 424 425/** 426 * struct usb_composite_device - represents one composite usb gadget 427 * @gadget: read-only, abstracts the gadget's usb peripheral controller 428 * @req: used for control responses; buffer is pre-allocated 429 * @os_desc_req: used for OS descriptors responses; buffer is pre-allocated 430 * @config: the currently active configuration 431 * @qw_sign: qwSignature part of the OS string 432 * @b_vendor_code: bMS_VendorCode part of the OS string 433 * @use_os_string: false by default, interested gadgets set it 434 * @os_desc_config: the configuration to be used with OS descriptors 435 * @setup_pending: true when setup request is queued but not completed 436 * @os_desc_pending: true when os_desc request is queued but not completed 437 * 438 * One of these devices is allocated and initialized before the 439 * associated device driver's bind() is called. 440 * 441 * OPEN ISSUE: it appears that some WUSB devices will need to be 442 * built by combining a normal (wired) gadget with a wireless one. 443 * This revision of the gadget framework should probably try to make 444 * sure doing that won't hurt too much. 445 * 446 * One notion for how to handle Wireless USB devices involves: 447 * (a) a second gadget here, discovery mechanism TBD, but likely 448 * needing separate "register/unregister WUSB gadget" calls; 449 * (b) updates to usb_gadget to include flags "is it wireless", 450 * "is it wired", plus (presumably in a wrapper structure) 451 * bandgroup and PHY info; 452 * (c) presumably a wireless_ep wrapping a usb_ep, and reporting 453 * wireless-specific parameters like maxburst and maxsequence; 454 * (d) configurations that are specific to wireless links; 455 * (e) function drivers that understand wireless configs and will 456 * support wireless for (additional) function instances; 457 * (f) a function to support association setup (like CBAF), not 458 * necessarily requiring a wireless adapter; 459 * (g) composite device setup that can create one or more wireless 460 * configs, including appropriate association setup support; 461 * (h) more, TBD. 462 */ 463struct usb_composite_dev { 464 struct usb_gadget *gadget; 465 struct usb_request *req; 466 struct usb_request *os_desc_req; 467 468 struct usb_configuration *config; 469 470 /* OS String is a custom (yet popular) extension to the USB standard. */ 471 u8 qw_sign[OS_STRING_QW_SIGN_LEN]; 472 u8 b_vendor_code; 473 struct usb_configuration *os_desc_config; 474 unsigned int use_os_string:1; 475 476 /* private: */ 477 /* internals */ 478 unsigned int suspended:1; 479 struct usb_device_descriptor desc; 480 struct list_head configs; 481 struct list_head gstrings; 482 struct usb_composite_driver *driver; 483 u8 next_string_id; 484 char *def_manufacturer; 485 486 /* the gadget driver won't enable the data pullup 487 * while the deactivation count is nonzero. 488 */ 489 unsigned deactivations; 490 491 /* the composite driver won't complete the control transfer's 492 * data/status stages till delayed_status is zero. 493 */ 494 int delayed_status; 495 496 /* protects deactivations and delayed_status counts*/ 497 spinlock_t lock; 498 499 unsigned setup_pending:1; 500 unsigned os_desc_pending:1; 501}; 502 503extern int usb_string_id(struct usb_composite_dev *c); 504extern int usb_string_ids_tab(struct usb_composite_dev *c, 505 struct usb_string *str); 506extern struct usb_string *usb_gstrings_attach(struct usb_composite_dev *cdev, 507 struct usb_gadget_strings **sp, unsigned n_strings); 508 509extern int usb_string_ids_n(struct usb_composite_dev *c, unsigned n); 510 511extern void composite_disconnect(struct usb_gadget *gadget); 512extern int composite_setup(struct usb_gadget *gadget, 513 const struct usb_ctrlrequest *ctrl); 514extern void composite_suspend(struct usb_gadget *gadget); 515extern void composite_resume(struct usb_gadget *gadget); 516 517/* 518 * Some systems will need runtime overrides for the product identifiers 519 * published in the device descriptor, either numbers or strings or both. 520 * String parameters are in UTF-8 (superset of ASCII's 7 bit characters). 521 */ 522struct usb_composite_overwrite { 523 u16 idVendor; 524 u16 idProduct; 525 u16 bcdDevice; 526 char *serial_number; 527 char *manufacturer; 528 char *product; 529}; 530#define USB_GADGET_COMPOSITE_OPTIONS() \ 531 static struct usb_composite_overwrite coverwrite; \ 532 \ 533 module_param_named(idVendor, coverwrite.idVendor, ushort, S_IRUGO); \ 534 MODULE_PARM_DESC(idVendor, "USB Vendor ID"); \ 535 \ 536 module_param_named(idProduct, coverwrite.idProduct, ushort, S_IRUGO); \ 537 MODULE_PARM_DESC(idProduct, "USB Product ID"); \ 538 \ 539 module_param_named(bcdDevice, coverwrite.bcdDevice, ushort, S_IRUGO); \ 540 MODULE_PARM_DESC(bcdDevice, "USB Device version (BCD)"); \ 541 \ 542 module_param_named(iSerialNumber, coverwrite.serial_number, charp, \ 543 S_IRUGO); \ 544 MODULE_PARM_DESC(iSerialNumber, "SerialNumber string"); \ 545 \ 546 module_param_named(iManufacturer, coverwrite.manufacturer, charp, \ 547 S_IRUGO); \ 548 MODULE_PARM_DESC(iManufacturer, "USB Manufacturer string"); \ 549 \ 550 module_param_named(iProduct, coverwrite.product, charp, S_IRUGO); \ 551 MODULE_PARM_DESC(iProduct, "USB Product string") 552 553void usb_composite_overwrite_options(struct usb_composite_dev *cdev, 554 struct usb_composite_overwrite *covr); 555 556static inline u16 get_default_bcdDevice(void) 557{ 558 u16 bcdDevice; 559 560 bcdDevice = bin2bcd((LINUX_VERSION_CODE >> 16 & 0xff)) << 8; 561 bcdDevice |= bin2bcd((LINUX_VERSION_CODE >> 8 & 0xff)); 562 return bcdDevice; 563} 564 565struct usb_function_driver { 566 const char *name; 567 struct module *mod; 568 struct list_head list; 569 struct usb_function_instance *(*alloc_inst)(void); 570 struct usb_function *(*alloc_func)(struct usb_function_instance *inst); 571}; 572 573struct usb_function_instance { 574 struct config_group group; 575 struct list_head cfs_list; 576 struct usb_function_driver *fd; 577 int (*set_inst_name)(struct usb_function_instance *inst, 578 const char *name); 579 void (*free_func_inst)(struct usb_function_instance *inst); 580}; 581 582void usb_function_unregister(struct usb_function_driver *f); 583int usb_function_register(struct usb_function_driver *newf); 584void usb_put_function_instance(struct usb_function_instance *fi); 585void usb_put_function(struct usb_function *f); 586struct usb_function_instance *usb_get_function_instance(const char *name); 587struct usb_function *usb_get_function(struct usb_function_instance *fi); 588 589struct usb_configuration *usb_get_config(struct usb_composite_dev *cdev, 590 int val); 591int usb_add_config_only(struct usb_composite_dev *cdev, 592 struct usb_configuration *config); 593void usb_remove_function(struct usb_configuration *c, struct usb_function *f); 594 595#define DECLARE_USB_FUNCTION(_name, _inst_alloc, _func_alloc) \ 596 static struct usb_function_driver _name ## usb_func = { \ 597 .name = __stringify(_name), \ 598 .mod = THIS_MODULE, \ 599 .alloc_inst = _inst_alloc, \ 600 .alloc_func = _func_alloc, \ 601 }; \ 602 MODULE_ALIAS("usbfunc:"__stringify(_name)); 603 604#define DECLARE_USB_FUNCTION_INIT(_name, _inst_alloc, _func_alloc) \ 605 DECLARE_USB_FUNCTION(_name, _inst_alloc, _func_alloc) \ 606 static int __init _name ## mod_init(void) \ 607 { \ 608 return usb_function_register(&_name ## usb_func); \ 609 } \ 610 static void __exit _name ## mod_exit(void) \ 611 { \ 612 usb_function_unregister(&_name ## usb_func); \ 613 } \ 614 module_init(_name ## mod_init); \ 615 module_exit(_name ## mod_exit) 616 617/* messaging utils */ 618#define DBG(d, fmt, args...) \ 619 dev_dbg(&(d)->gadget->dev , fmt , ## args) 620#define VDBG(d, fmt, args...) \ 621 dev_vdbg(&(d)->gadget->dev , fmt , ## args) 622#define ERROR(d, fmt, args...) \ 623 dev_err(&(d)->gadget->dev , fmt , ## args) 624#define WARNING(d, fmt, args...) \ 625 dev_warn(&(d)->gadget->dev , fmt , ## args) 626#define INFO(d, fmt, args...) \ 627 dev_info(&(d)->gadget->dev , fmt , ## args) 628 629#endif /* __LINUX_USB_COMPOSITE_H */ 630