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