Felipe Balbi | 3086775 | 2008-08-18 17:39:30 -0700 | [diff] [blame] | 1 | /* |
| 2 | * f_obex.c -- USB CDC OBEX function driver |
| 3 | * |
| 4 | * Copyright (C) 2008 Nokia Corporation |
| 5 | * Contact: Felipe Balbi <felipe.balbi@nokia.com> |
| 6 | * |
| 7 | * Based on f_acm.c by Al Borchers and David Brownell. |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2 of the License, or |
| 12 | * (at your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, |
| 15 | * but WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | * GNU General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License |
| 20 | * along with this program; if not, write to the Free Software |
| 21 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
| 22 | */ |
| 23 | |
| 24 | /* #define VERBOSE_DEBUG */ |
| 25 | |
Tejun Heo | 5a0e3ad | 2010-03-24 17:04:11 +0900 | [diff] [blame] | 26 | #include <linux/slab.h> |
Felipe Balbi | 3086775 | 2008-08-18 17:39:30 -0700 | [diff] [blame] | 27 | #include <linux/kernel.h> |
Felipe Balbi | 3086775 | 2008-08-18 17:39:30 -0700 | [diff] [blame] | 28 | #include <linux/device.h> |
| 29 | |
| 30 | #include "u_serial.h" |
| 31 | #include "gadget_chips.h" |
| 32 | |
| 33 | |
| 34 | /* |
| 35 | * This CDC OBEX function support just packages a TTY-ish byte stream. |
| 36 | * A user mode server will put it into "raw" mode and handle all the |
| 37 | * relevant protocol details ... this is just a kernel passthrough. |
David Brownell | 2121427 | 2008-08-18 17:45:25 -0700 | [diff] [blame] | 38 | * When possible, we prevent gadget enumeration until that server is |
| 39 | * ready to handle the commands. |
Felipe Balbi | 3086775 | 2008-08-18 17:39:30 -0700 | [diff] [blame] | 40 | */ |
| 41 | |
Felipe Balbi | 3086775 | 2008-08-18 17:39:30 -0700 | [diff] [blame] | 42 | struct f_obex { |
| 43 | struct gserial port; |
| 44 | u8 ctrl_id; |
| 45 | u8 data_id; |
| 46 | u8 port_num; |
David Brownell | 2121427 | 2008-08-18 17:45:25 -0700 | [diff] [blame] | 47 | u8 can_activate; |
Felipe Balbi | 3086775 | 2008-08-18 17:39:30 -0700 | [diff] [blame] | 48 | }; |
| 49 | |
| 50 | static inline struct f_obex *func_to_obex(struct usb_function *f) |
| 51 | { |
| 52 | return container_of(f, struct f_obex, port.func); |
| 53 | } |
| 54 | |
David Brownell | 2121427 | 2008-08-18 17:45:25 -0700 | [diff] [blame] | 55 | static inline struct f_obex *port_to_obex(struct gserial *p) |
| 56 | { |
| 57 | return container_of(p, struct f_obex, port); |
| 58 | } |
| 59 | |
Felipe Balbi | 3086775 | 2008-08-18 17:39:30 -0700 | [diff] [blame] | 60 | /*-------------------------------------------------------------------------*/ |
| 61 | |
| 62 | #define OBEX_CTRL_IDX 0 |
| 63 | #define OBEX_DATA_IDX 1 |
| 64 | |
| 65 | static struct usb_string obex_string_defs[] = { |
| 66 | [OBEX_CTRL_IDX].s = "CDC Object Exchange (OBEX)", |
| 67 | [OBEX_DATA_IDX].s = "CDC OBEX Data", |
| 68 | { }, /* end of list */ |
| 69 | }; |
| 70 | |
| 71 | static struct usb_gadget_strings obex_string_table = { |
| 72 | .language = 0x0409, /* en-US */ |
| 73 | .strings = obex_string_defs, |
| 74 | }; |
| 75 | |
| 76 | static struct usb_gadget_strings *obex_strings[] = { |
| 77 | &obex_string_table, |
| 78 | NULL, |
| 79 | }; |
| 80 | |
| 81 | /*-------------------------------------------------------------------------*/ |
| 82 | |
| 83 | static struct usb_interface_descriptor obex_control_intf __initdata = { |
| 84 | .bLength = sizeof(obex_control_intf), |
| 85 | .bDescriptorType = USB_DT_INTERFACE, |
| 86 | .bInterfaceNumber = 0, |
| 87 | |
| 88 | .bAlternateSetting = 0, |
| 89 | .bNumEndpoints = 0, |
| 90 | .bInterfaceClass = USB_CLASS_COMM, |
| 91 | .bInterfaceSubClass = USB_CDC_SUBCLASS_OBEX, |
| 92 | }; |
| 93 | |
| 94 | static struct usb_interface_descriptor obex_data_nop_intf __initdata = { |
| 95 | .bLength = sizeof(obex_data_nop_intf), |
| 96 | .bDescriptorType = USB_DT_INTERFACE, |
| 97 | .bInterfaceNumber = 1, |
| 98 | |
| 99 | .bAlternateSetting = 0, |
| 100 | .bNumEndpoints = 0, |
| 101 | .bInterfaceClass = USB_CLASS_CDC_DATA, |
| 102 | }; |
| 103 | |
| 104 | static struct usb_interface_descriptor obex_data_intf __initdata = { |
| 105 | .bLength = sizeof(obex_data_intf), |
| 106 | .bDescriptorType = USB_DT_INTERFACE, |
| 107 | .bInterfaceNumber = 2, |
| 108 | |
| 109 | .bAlternateSetting = 1, |
| 110 | .bNumEndpoints = 2, |
| 111 | .bInterfaceClass = USB_CLASS_CDC_DATA, |
| 112 | }; |
| 113 | |
| 114 | static struct usb_cdc_header_desc obex_cdc_header_desc __initdata = { |
| 115 | .bLength = sizeof(obex_cdc_header_desc), |
| 116 | .bDescriptorType = USB_DT_CS_INTERFACE, |
| 117 | .bDescriptorSubType = USB_CDC_HEADER_TYPE, |
Harvey Harrison | 551509d | 2009-02-11 14:11:36 -0800 | [diff] [blame] | 118 | .bcdCDC = cpu_to_le16(0x0120), |
Felipe Balbi | 3086775 | 2008-08-18 17:39:30 -0700 | [diff] [blame] | 119 | }; |
| 120 | |
| 121 | static struct usb_cdc_union_desc obex_cdc_union_desc __initdata = { |
| 122 | .bLength = sizeof(obex_cdc_union_desc), |
| 123 | .bDescriptorType = USB_DT_CS_INTERFACE, |
| 124 | .bDescriptorSubType = USB_CDC_UNION_TYPE, |
| 125 | .bMasterInterface0 = 1, |
| 126 | .bSlaveInterface0 = 2, |
| 127 | }; |
| 128 | |
| 129 | static struct usb_cdc_obex_desc obex_desc __initdata = { |
| 130 | .bLength = sizeof(obex_desc), |
| 131 | .bDescriptorType = USB_DT_CS_INTERFACE, |
| 132 | .bDescriptorSubType = USB_CDC_OBEX_TYPE, |
Harvey Harrison | 551509d | 2009-02-11 14:11:36 -0800 | [diff] [blame] | 133 | .bcdVersion = cpu_to_le16(0x0100), |
Felipe Balbi | 3086775 | 2008-08-18 17:39:30 -0700 | [diff] [blame] | 134 | }; |
| 135 | |
| 136 | /* High-Speed Support */ |
| 137 | |
| 138 | static struct usb_endpoint_descriptor obex_hs_ep_out_desc __initdata = { |
| 139 | .bLength = USB_DT_ENDPOINT_SIZE, |
| 140 | .bDescriptorType = USB_DT_ENDPOINT, |
| 141 | |
| 142 | .bEndpointAddress = USB_DIR_OUT, |
| 143 | .bmAttributes = USB_ENDPOINT_XFER_BULK, |
Harvey Harrison | 551509d | 2009-02-11 14:11:36 -0800 | [diff] [blame] | 144 | .wMaxPacketSize = cpu_to_le16(512), |
Felipe Balbi | 3086775 | 2008-08-18 17:39:30 -0700 | [diff] [blame] | 145 | }; |
| 146 | |
| 147 | static struct usb_endpoint_descriptor obex_hs_ep_in_desc __initdata = { |
| 148 | .bLength = USB_DT_ENDPOINT_SIZE, |
| 149 | .bDescriptorType = USB_DT_ENDPOINT, |
| 150 | |
| 151 | .bEndpointAddress = USB_DIR_IN, |
| 152 | .bmAttributes = USB_ENDPOINT_XFER_BULK, |
Harvey Harrison | 551509d | 2009-02-11 14:11:36 -0800 | [diff] [blame] | 153 | .wMaxPacketSize = cpu_to_le16(512), |
Felipe Balbi | 3086775 | 2008-08-18 17:39:30 -0700 | [diff] [blame] | 154 | }; |
| 155 | |
| 156 | static struct usb_descriptor_header *hs_function[] __initdata = { |
| 157 | (struct usb_descriptor_header *) &obex_control_intf, |
| 158 | (struct usb_descriptor_header *) &obex_cdc_header_desc, |
| 159 | (struct usb_descriptor_header *) &obex_desc, |
| 160 | (struct usb_descriptor_header *) &obex_cdc_union_desc, |
| 161 | |
| 162 | (struct usb_descriptor_header *) &obex_data_nop_intf, |
| 163 | (struct usb_descriptor_header *) &obex_data_intf, |
| 164 | (struct usb_descriptor_header *) &obex_hs_ep_in_desc, |
| 165 | (struct usb_descriptor_header *) &obex_hs_ep_out_desc, |
| 166 | NULL, |
| 167 | }; |
| 168 | |
| 169 | /* Full-Speed Support */ |
| 170 | |
| 171 | static struct usb_endpoint_descriptor obex_fs_ep_in_desc __initdata = { |
| 172 | .bLength = USB_DT_ENDPOINT_SIZE, |
| 173 | .bDescriptorType = USB_DT_ENDPOINT, |
| 174 | |
| 175 | .bEndpointAddress = USB_DIR_IN, |
| 176 | .bmAttributes = USB_ENDPOINT_XFER_BULK, |
| 177 | }; |
| 178 | |
| 179 | static struct usb_endpoint_descriptor obex_fs_ep_out_desc __initdata = { |
| 180 | .bLength = USB_DT_ENDPOINT_SIZE, |
| 181 | .bDescriptorType = USB_DT_ENDPOINT, |
| 182 | |
| 183 | .bEndpointAddress = USB_DIR_OUT, |
| 184 | .bmAttributes = USB_ENDPOINT_XFER_BULK, |
| 185 | }; |
| 186 | |
| 187 | static struct usb_descriptor_header *fs_function[] __initdata = { |
| 188 | (struct usb_descriptor_header *) &obex_control_intf, |
| 189 | (struct usb_descriptor_header *) &obex_cdc_header_desc, |
| 190 | (struct usb_descriptor_header *) &obex_desc, |
| 191 | (struct usb_descriptor_header *) &obex_cdc_union_desc, |
| 192 | |
| 193 | (struct usb_descriptor_header *) &obex_data_nop_intf, |
| 194 | (struct usb_descriptor_header *) &obex_data_intf, |
| 195 | (struct usb_descriptor_header *) &obex_fs_ep_in_desc, |
| 196 | (struct usb_descriptor_header *) &obex_fs_ep_out_desc, |
| 197 | NULL, |
| 198 | }; |
| 199 | |
| 200 | /*-------------------------------------------------------------------------*/ |
| 201 | |
| 202 | static int obex_set_alt(struct usb_function *f, unsigned intf, unsigned alt) |
| 203 | { |
| 204 | struct f_obex *obex = func_to_obex(f); |
| 205 | struct usb_composite_dev *cdev = f->config->cdev; |
| 206 | |
| 207 | if (intf == obex->ctrl_id) { |
| 208 | if (alt != 0) |
| 209 | goto fail; |
| 210 | /* NOP */ |
| 211 | DBG(cdev, "reset obex ttyGS%d control\n", obex->port_num); |
| 212 | |
| 213 | } else if (intf == obex->data_id) { |
| 214 | if (alt > 1) |
| 215 | goto fail; |
| 216 | |
| 217 | if (obex->port.in->driver_data) { |
| 218 | DBG(cdev, "reset obex ttyGS%d\n", obex->port_num); |
| 219 | gserial_disconnect(&obex->port); |
| 220 | } |
| 221 | |
Tatyana Brokhman | ea2a1df | 2011-06-28 16:33:50 +0300 | [diff] [blame^] | 222 | if (!obex->port.in->desc || !obex->port.out->desc) { |
Felipe Balbi | 3086775 | 2008-08-18 17:39:30 -0700 | [diff] [blame] | 223 | DBG(cdev, "init obex ttyGS%d\n", obex->port_num); |
Tatyana Brokhman | ea2a1df | 2011-06-28 16:33:50 +0300 | [diff] [blame^] | 224 | if (config_ep_by_speed(cdev->gadget, f, |
| 225 | obex->port.in) || |
| 226 | config_ep_by_speed(cdev->gadget, f, |
| 227 | obex->port.out)) { |
| 228 | obex->port.out->desc = NULL; |
| 229 | obex->port.in->desc = NULL; |
| 230 | goto fail; |
| 231 | } |
Felipe Balbi | 3086775 | 2008-08-18 17:39:30 -0700 | [diff] [blame] | 232 | } |
| 233 | |
| 234 | if (alt == 1) { |
| 235 | DBG(cdev, "activate obex ttyGS%d\n", obex->port_num); |
| 236 | gserial_connect(&obex->port, obex->port_num); |
| 237 | } |
| 238 | |
| 239 | } else |
| 240 | goto fail; |
| 241 | |
| 242 | return 0; |
| 243 | |
| 244 | fail: |
| 245 | return -EINVAL; |
| 246 | } |
| 247 | |
| 248 | static int obex_get_alt(struct usb_function *f, unsigned intf) |
| 249 | { |
| 250 | struct f_obex *obex = func_to_obex(f); |
| 251 | |
| 252 | if (intf == obex->ctrl_id) |
| 253 | return 0; |
| 254 | |
| 255 | return obex->port.in->driver_data ? 1 : 0; |
| 256 | } |
| 257 | |
| 258 | static void obex_disable(struct usb_function *f) |
| 259 | { |
| 260 | struct f_obex *obex = func_to_obex(f); |
| 261 | struct usb_composite_dev *cdev = f->config->cdev; |
| 262 | |
| 263 | DBG(cdev, "obex ttyGS%d disable\n", obex->port_num); |
| 264 | gserial_disconnect(&obex->port); |
| 265 | } |
| 266 | |
| 267 | /*-------------------------------------------------------------------------*/ |
| 268 | |
David Brownell | 2121427 | 2008-08-18 17:45:25 -0700 | [diff] [blame] | 269 | static void obex_connect(struct gserial *g) |
| 270 | { |
| 271 | struct f_obex *obex = port_to_obex(g); |
| 272 | struct usb_composite_dev *cdev = g->func.config->cdev; |
| 273 | int status; |
| 274 | |
| 275 | if (!obex->can_activate) |
| 276 | return; |
| 277 | |
| 278 | status = usb_function_activate(&g->func); |
| 279 | if (status) |
| 280 | DBG(cdev, "obex ttyGS%d function activate --> %d\n", |
| 281 | obex->port_num, status); |
| 282 | } |
| 283 | |
| 284 | static void obex_disconnect(struct gserial *g) |
| 285 | { |
| 286 | struct f_obex *obex = port_to_obex(g); |
| 287 | struct usb_composite_dev *cdev = g->func.config->cdev; |
| 288 | int status; |
| 289 | |
| 290 | if (!obex->can_activate) |
| 291 | return; |
| 292 | |
| 293 | status = usb_function_deactivate(&g->func); |
| 294 | if (status) |
| 295 | DBG(cdev, "obex ttyGS%d function deactivate --> %d\n", |
| 296 | obex->port_num, status); |
| 297 | } |
| 298 | |
| 299 | /*-------------------------------------------------------------------------*/ |
| 300 | |
Felipe Balbi | 3086775 | 2008-08-18 17:39:30 -0700 | [diff] [blame] | 301 | static int __init |
| 302 | obex_bind(struct usb_configuration *c, struct usb_function *f) |
| 303 | { |
| 304 | struct usb_composite_dev *cdev = c->cdev; |
| 305 | struct f_obex *obex = func_to_obex(f); |
| 306 | int status; |
| 307 | struct usb_ep *ep; |
| 308 | |
| 309 | /* allocate instance-specific interface IDs, and patch descriptors */ |
| 310 | |
| 311 | status = usb_interface_id(c, f); |
| 312 | if (status < 0) |
| 313 | goto fail; |
| 314 | obex->ctrl_id = status; |
| 315 | |
| 316 | obex_control_intf.bInterfaceNumber = status; |
| 317 | obex_cdc_union_desc.bMasterInterface0 = status; |
| 318 | |
| 319 | status = usb_interface_id(c, f); |
| 320 | if (status < 0) |
| 321 | goto fail; |
| 322 | obex->data_id = status; |
| 323 | |
| 324 | obex_data_nop_intf.bInterfaceNumber = status; |
| 325 | obex_data_intf.bInterfaceNumber = status; |
| 326 | obex_cdc_union_desc.bSlaveInterface0 = status; |
| 327 | |
| 328 | /* allocate instance-specific endpoints */ |
| 329 | |
| 330 | ep = usb_ep_autoconfig(cdev->gadget, &obex_fs_ep_in_desc); |
| 331 | if (!ep) |
| 332 | goto fail; |
| 333 | obex->port.in = ep; |
| 334 | ep->driver_data = cdev; /* claim */ |
| 335 | |
| 336 | ep = usb_ep_autoconfig(cdev->gadget, &obex_fs_ep_out_desc); |
| 337 | if (!ep) |
| 338 | goto fail; |
| 339 | obex->port.out = ep; |
| 340 | ep->driver_data = cdev; /* claim */ |
| 341 | |
| 342 | /* copy descriptors, and track endpoint copies */ |
| 343 | f->descriptors = usb_copy_descriptors(fs_function); |
| 344 | |
Felipe Balbi | 3086775 | 2008-08-18 17:39:30 -0700 | [diff] [blame] | 345 | /* support all relevant hardware speeds... we expect that when |
| 346 | * hardware is dual speed, all bulk-capable endpoints work at |
| 347 | * both speeds |
| 348 | */ |
| 349 | if (gadget_is_dualspeed(c->cdev->gadget)) { |
| 350 | |
| 351 | obex_hs_ep_in_desc.bEndpointAddress = |
| 352 | obex_fs_ep_in_desc.bEndpointAddress; |
| 353 | obex_hs_ep_out_desc.bEndpointAddress = |
| 354 | obex_fs_ep_out_desc.bEndpointAddress; |
| 355 | |
| 356 | /* copy descriptors, and track endpoint copies */ |
| 357 | f->hs_descriptors = usb_copy_descriptors(hs_function); |
Felipe Balbi | 3086775 | 2008-08-18 17:39:30 -0700 | [diff] [blame] | 358 | } |
| 359 | |
David Brownell | 2121427 | 2008-08-18 17:45:25 -0700 | [diff] [blame] | 360 | /* Avoid letting this gadget enumerate until the userspace |
| 361 | * OBEX server is active. |
| 362 | */ |
| 363 | status = usb_function_deactivate(f); |
| 364 | if (status < 0) |
| 365 | WARNING(cdev, "obex ttyGS%d: can't prevent enumeration, %d\n", |
| 366 | obex->port_num, status); |
| 367 | else |
| 368 | obex->can_activate = true; |
| 369 | |
| 370 | |
Felipe Balbi | 3086775 | 2008-08-18 17:39:30 -0700 | [diff] [blame] | 371 | DBG(cdev, "obex ttyGS%d: %s speed IN/%s OUT/%s\n", |
| 372 | obex->port_num, |
| 373 | gadget_is_dualspeed(c->cdev->gadget) ? "dual" : "full", |
| 374 | obex->port.in->name, obex->port.out->name); |
| 375 | |
| 376 | return 0; |
| 377 | |
| 378 | fail: |
| 379 | /* we might as well release our claims on endpoints */ |
| 380 | if (obex->port.out) |
| 381 | obex->port.out->driver_data = NULL; |
| 382 | if (obex->port.in) |
| 383 | obex->port.in->driver_data = NULL; |
| 384 | |
| 385 | ERROR(cdev, "%s/%p: can't bind, err %d\n", f->name, f, status); |
| 386 | |
| 387 | return status; |
| 388 | } |
| 389 | |
| 390 | static void |
| 391 | obex_unbind(struct usb_configuration *c, struct usb_function *f) |
| 392 | { |
| 393 | if (gadget_is_dualspeed(c->cdev->gadget)) |
| 394 | usb_free_descriptors(f->hs_descriptors); |
| 395 | usb_free_descriptors(f->descriptors); |
| 396 | kfree(func_to_obex(f)); |
| 397 | } |
| 398 | |
| 399 | /* Some controllers can't support CDC OBEX ... */ |
| 400 | static inline bool can_support_obex(struct usb_configuration *c) |
| 401 | { |
| 402 | /* Since the first interface is a NOP, we can ignore the |
| 403 | * issue of multi-interface support on most controllers. |
| 404 | * |
| 405 | * Altsettings are mandatory, however... |
| 406 | */ |
| 407 | if (!gadget_supports_altsettings(c->cdev->gadget)) |
| 408 | return false; |
| 409 | |
| 410 | /* everything else is *probably* fine ... */ |
| 411 | return true; |
| 412 | } |
| 413 | |
| 414 | /** |
| 415 | * obex_bind_config - add a CDC OBEX function to a configuration |
| 416 | * @c: the configuration to support the CDC OBEX instance |
| 417 | * @port_num: /dev/ttyGS* port this interface will use |
| 418 | * Context: single threaded during gadget setup |
| 419 | * |
| 420 | * Returns zero on success, else negative errno. |
| 421 | * |
| 422 | * Caller must have called @gserial_setup() with enough ports to |
| 423 | * handle all the ones it binds. Caller is also responsible |
| 424 | * for calling @gserial_cleanup() before module unload. |
| 425 | */ |
| 426 | int __init obex_bind_config(struct usb_configuration *c, u8 port_num) |
| 427 | { |
| 428 | struct f_obex *obex; |
| 429 | int status; |
| 430 | |
| 431 | if (!can_support_obex(c)) |
| 432 | return -EINVAL; |
| 433 | |
| 434 | /* maybe allocate device-global string IDs, and patch descriptors */ |
| 435 | if (obex_string_defs[OBEX_CTRL_IDX].id == 0) { |
| 436 | status = usb_string_id(c->cdev); |
| 437 | if (status < 0) |
| 438 | return status; |
| 439 | obex_string_defs[OBEX_CTRL_IDX].id = status; |
| 440 | |
| 441 | obex_control_intf.iInterface = status; |
| 442 | |
| 443 | status = usb_string_id(c->cdev); |
| 444 | if (status < 0) |
| 445 | return status; |
| 446 | obex_string_defs[OBEX_DATA_IDX].id = status; |
| 447 | |
| 448 | obex_data_nop_intf.iInterface = |
| 449 | obex_data_intf.iInterface = status; |
| 450 | } |
| 451 | |
| 452 | /* allocate and initialize one new instance */ |
| 453 | obex = kzalloc(sizeof *obex, GFP_KERNEL); |
| 454 | if (!obex) |
| 455 | return -ENOMEM; |
| 456 | |
| 457 | obex->port_num = port_num; |
| 458 | |
David Brownell | 2121427 | 2008-08-18 17:45:25 -0700 | [diff] [blame] | 459 | obex->port.connect = obex_connect; |
| 460 | obex->port.disconnect = obex_disconnect; |
| 461 | |
Felipe Balbi | 3086775 | 2008-08-18 17:39:30 -0700 | [diff] [blame] | 462 | obex->port.func.name = "obex"; |
| 463 | obex->port.func.strings = obex_strings; |
| 464 | /* descriptors are per-instance copies */ |
| 465 | obex->port.func.bind = obex_bind; |
| 466 | obex->port.func.unbind = obex_unbind; |
| 467 | obex->port.func.set_alt = obex_set_alt; |
| 468 | obex->port.func.get_alt = obex_get_alt; |
| 469 | obex->port.func.disable = obex_disable; |
| 470 | |
| 471 | status = usb_add_function(c, &obex->port.func); |
| 472 | if (status) |
| 473 | kfree(obex); |
| 474 | |
| 475 | return status; |
| 476 | } |
| 477 | |
| 478 | MODULE_AUTHOR("Felipe Balbi"); |
| 479 | MODULE_LICENSE("GPL"); |