1 /* 2 * USB HandSpring Visor, Palm m50x, and Sony Clie driver 3 * (supports all of the Palm OS USB devices) 4 * 5 * Copyright (C) 1999 - 2004 6 * Greg Kroah-Hartman (greg@kroah.com) 7 * 8 * This program is free software; you can redistribute it and/or 9 * modify it under the terms of the GNU General Public License version 10 * 2 as published by the Free Software Foundation. 11 * 12 * See Documentation/usb/usb-serial.txt for more information on using this 13 * driver 14 * 15 */ 16 17 #include <linux/kernel.h> 18 #include <linux/errno.h> 19 #include <linux/slab.h> 20 #include <linux/tty.h> 21 #include <linux/tty_driver.h> 22 #include <linux/tty_flip.h> 23 #include <linux/module.h> 24 #include <linux/moduleparam.h> 25 #include <linux/spinlock.h> 26 #include <linux/uaccess.h> 27 #include <linux/usb.h> 28 #include <linux/usb/serial.h> 29 #include <linux/usb/cdc.h> 30 #include "visor.h" 31 32 /* 33 * Version Information 34 */ 35 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>" 36 #define DRIVER_DESC "USB HandSpring Visor / Palm OS driver" 37 38 /* function prototypes for a handspring visor */ 39 static int visor_open(struct tty_struct *tty, struct usb_serial_port *port); 40 static void visor_close(struct usb_serial_port *port); 41 static int visor_probe(struct usb_serial *serial, 42 const struct usb_device_id *id); 43 static int visor_calc_num_ports(struct usb_serial *serial, 44 struct usb_serial_endpoints *epds); 45 static int clie_5_calc_num_ports(struct usb_serial *serial, 46 struct usb_serial_endpoints *epds); 47 static void visor_read_int_callback(struct urb *urb); 48 static int clie_3_5_startup(struct usb_serial *serial); 49 static int palm_os_3_probe(struct usb_serial *serial, 50 const struct usb_device_id *id); 51 static int palm_os_4_probe(struct usb_serial *serial, 52 const struct usb_device_id *id); 53 54 static const struct usb_device_id id_table[] = { 55 { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_VISOR_ID), 56 .driver_info = (kernel_ulong_t)&palm_os_3_probe }, 57 { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_TREO_ID), 58 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 59 { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_TREO600_ID), 60 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 61 { USB_DEVICE(GSPDA_VENDOR_ID, GSPDA_XPLORE_M68_ID), 62 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 63 { USB_DEVICE(PALM_VENDOR_ID, PALM_M500_ID), 64 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 65 { USB_DEVICE(PALM_VENDOR_ID, PALM_M505_ID), 66 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 67 { USB_DEVICE(PALM_VENDOR_ID, PALM_M515_ID), 68 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 69 { USB_DEVICE(PALM_VENDOR_ID, PALM_I705_ID), 70 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 71 { USB_DEVICE(PALM_VENDOR_ID, PALM_M100_ID), 72 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 73 { USB_DEVICE(PALM_VENDOR_ID, PALM_M125_ID), 74 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 75 { USB_DEVICE(PALM_VENDOR_ID, PALM_M130_ID), 76 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 77 { USB_DEVICE(PALM_VENDOR_ID, PALM_TUNGSTEN_T_ID), 78 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 79 { USB_DEVICE(PALM_VENDOR_ID, PALM_TREO_650), 80 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 81 { USB_DEVICE(PALM_VENDOR_ID, PALM_TUNGSTEN_Z_ID), 82 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 83 { USB_DEVICE(PALM_VENDOR_ID, PALM_ZIRE_ID), 84 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 85 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_4_0_ID), 86 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 87 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_S360_ID), 88 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 89 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_4_1_ID), 90 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 91 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_NX60_ID), 92 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 93 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_NZ90V_ID), 94 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 95 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_TJ25_ID), 96 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 97 { USB_DEVICE(ACER_VENDOR_ID, ACER_S10_ID), 98 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 99 { USB_DEVICE_INTERFACE_CLASS(SAMSUNG_VENDOR_ID, SAMSUNG_SCH_I330_ID, 0xff), 100 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 101 { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_SPH_I500_ID), 102 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 103 { USB_DEVICE(TAPWAVE_VENDOR_ID, TAPWAVE_ZODIAC_ID), 104 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 105 { USB_DEVICE(GARMIN_VENDOR_ID, GARMIN_IQUE_3600_ID), 106 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 107 { USB_DEVICE(ACEECA_VENDOR_ID, ACEECA_MEZ1000_ID), 108 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 109 { USB_DEVICE(KYOCERA_VENDOR_ID, KYOCERA_7135_ID), 110 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 111 { USB_DEVICE(FOSSIL_VENDOR_ID, FOSSIL_ABACUS_ID), 112 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 113 { } /* Terminating entry */ 114 }; 115 116 static const struct usb_device_id clie_id_5_table[] = { 117 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_UX50_ID), 118 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 119 { } /* Terminating entry */ 120 }; 121 122 static const struct usb_device_id clie_id_3_5_table[] = { 123 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_3_5_ID) }, 124 { } /* Terminating entry */ 125 }; 126 127 static const struct usb_device_id id_table_combined[] = { 128 { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_VISOR_ID) }, 129 { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_TREO_ID) }, 130 { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_TREO600_ID) }, 131 { USB_DEVICE(GSPDA_VENDOR_ID, GSPDA_XPLORE_M68_ID) }, 132 { USB_DEVICE(PALM_VENDOR_ID, PALM_M500_ID) }, 133 { USB_DEVICE(PALM_VENDOR_ID, PALM_M505_ID) }, 134 { USB_DEVICE(PALM_VENDOR_ID, PALM_M515_ID) }, 135 { USB_DEVICE(PALM_VENDOR_ID, PALM_I705_ID) }, 136 { USB_DEVICE(PALM_VENDOR_ID, PALM_M100_ID) }, 137 { USB_DEVICE(PALM_VENDOR_ID, PALM_M125_ID) }, 138 { USB_DEVICE(PALM_VENDOR_ID, PALM_M130_ID) }, 139 { USB_DEVICE(PALM_VENDOR_ID, PALM_TUNGSTEN_T_ID) }, 140 { USB_DEVICE(PALM_VENDOR_ID, PALM_TREO_650) }, 141 { USB_DEVICE(PALM_VENDOR_ID, PALM_TUNGSTEN_Z_ID) }, 142 { USB_DEVICE(PALM_VENDOR_ID, PALM_ZIRE_ID) }, 143 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_3_5_ID) }, 144 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_4_0_ID) }, 145 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_S360_ID) }, 146 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_4_1_ID) }, 147 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_NX60_ID) }, 148 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_NZ90V_ID) }, 149 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_UX50_ID) }, 150 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_TJ25_ID) }, 151 { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_SCH_I330_ID) }, 152 { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_SPH_I500_ID) }, 153 { USB_DEVICE(TAPWAVE_VENDOR_ID, TAPWAVE_ZODIAC_ID) }, 154 { USB_DEVICE(GARMIN_VENDOR_ID, GARMIN_IQUE_3600_ID) }, 155 { USB_DEVICE(ACEECA_VENDOR_ID, ACEECA_MEZ1000_ID) }, 156 { USB_DEVICE(KYOCERA_VENDOR_ID, KYOCERA_7135_ID) }, 157 { USB_DEVICE(FOSSIL_VENDOR_ID, FOSSIL_ABACUS_ID) }, 158 { } /* Terminating entry */ 159 }; 160 161 MODULE_DEVICE_TABLE(usb, id_table_combined); 162 163 /* All of the device info needed for the Handspring Visor, 164 and Palm 4.0 devices */ 165 static struct usb_serial_driver handspring_device = { 166 .driver = { 167 .owner = THIS_MODULE, 168 .name = "visor", 169 }, 170 .description = "Handspring Visor / Palm OS", 171 .id_table = id_table, 172 .num_ports = 2, 173 .bulk_out_size = 256, 174 .open = visor_open, 175 .close = visor_close, 176 .throttle = usb_serial_generic_throttle, 177 .unthrottle = usb_serial_generic_unthrottle, 178 .probe = visor_probe, 179 .calc_num_ports = visor_calc_num_ports, 180 .read_int_callback = visor_read_int_callback, 181 }; 182 183 /* All of the device info needed for the Clie UX50, TH55 Palm 5.0 devices */ 184 static struct usb_serial_driver clie_5_device = { 185 .driver = { 186 .owner = THIS_MODULE, 187 .name = "clie_5", 188 }, 189 .description = "Sony Clie 5.0", 190 .id_table = clie_id_5_table, 191 .num_ports = 2, 192 .num_bulk_out = 2, 193 .bulk_out_size = 256, 194 .open = visor_open, 195 .close = visor_close, 196 .throttle = usb_serial_generic_throttle, 197 .unthrottle = usb_serial_generic_unthrottle, 198 .probe = visor_probe, 199 .calc_num_ports = clie_5_calc_num_ports, 200 .read_int_callback = visor_read_int_callback, 201 }; 202 203 /* device info for the Sony Clie OS version 3.5 */ 204 static struct usb_serial_driver clie_3_5_device = { 205 .driver = { 206 .owner = THIS_MODULE, 207 .name = "clie_3.5", 208 }, 209 .description = "Sony Clie 3.5", 210 .id_table = clie_id_3_5_table, 211 .num_ports = 1, 212 .bulk_out_size = 256, 213 .open = visor_open, 214 .close = visor_close, 215 .throttle = usb_serial_generic_throttle, 216 .unthrottle = usb_serial_generic_unthrottle, 217 .attach = clie_3_5_startup, 218 }; 219 220 static struct usb_serial_driver * const serial_drivers[] = { 221 &handspring_device, &clie_5_device, &clie_3_5_device, NULL 222 }; 223 224 /****************************************************************************** 225 * Handspring Visor specific driver functions 226 ******************************************************************************/ 227 static int visor_open(struct tty_struct *tty, struct usb_serial_port *port) 228 { 229 int result = 0; 230 231 if (!port->read_urb) { 232 /* this is needed for some brain dead Sony devices */ 233 dev_err(&port->dev, "Device lied about number of ports, please use a lower one.\n"); 234 return -ENODEV; 235 } 236 237 /* Start reading from the device */ 238 result = usb_serial_generic_open(tty, port); 239 if (result) 240 goto exit; 241 242 if (port->interrupt_in_urb) { 243 dev_dbg(&port->dev, "adding interrupt input for treo\n"); 244 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); 245 if (result) 246 dev_err(&port->dev, 247 "%s - failed submitting interrupt urb, error %d\n", 248 __func__, result); 249 } 250 exit: 251 return result; 252 } 253 254 255 static void visor_close(struct usb_serial_port *port) 256 { 257 unsigned char *transfer_buffer; 258 259 usb_serial_generic_close(port); 260 usb_kill_urb(port->interrupt_in_urb); 261 262 transfer_buffer = kmalloc(0x12, GFP_KERNEL); 263 if (!transfer_buffer) 264 return; 265 usb_control_msg(port->serial->dev, 266 usb_rcvctrlpipe(port->serial->dev, 0), 267 VISOR_CLOSE_NOTIFICATION, 0xc2, 268 0x0000, 0x0000, 269 transfer_buffer, 0x12, 300); 270 kfree(transfer_buffer); 271 } 272 273 static void visor_read_int_callback(struct urb *urb) 274 { 275 struct usb_serial_port *port = urb->context; 276 int status = urb->status; 277 int result; 278 279 switch (status) { 280 case 0: 281 /* success */ 282 break; 283 case -ECONNRESET: 284 case -ENOENT: 285 case -ESHUTDOWN: 286 /* this urb is terminated, clean up */ 287 dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n", 288 __func__, status); 289 return; 290 default: 291 dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n", 292 __func__, status); 293 goto exit; 294 } 295 296 /* 297 * This information is still unknown what it can be used for. 298 * If anyone has an idea, please let the author know... 299 * 300 * Rumor has it this endpoint is used to notify when data 301 * is ready to be read from the bulk ones. 302 */ 303 usb_serial_debug_data(&port->dev, __func__, urb->actual_length, 304 urb->transfer_buffer); 305 306 exit: 307 result = usb_submit_urb(urb, GFP_ATOMIC); 308 if (result) 309 dev_err(&urb->dev->dev, 310 "%s - Error %d submitting interrupt urb\n", 311 __func__, result); 312 } 313 314 static int palm_os_3_probe(struct usb_serial *serial, 315 const struct usb_device_id *id) 316 { 317 struct device *dev = &serial->dev->dev; 318 struct visor_connection_info *connection_info; 319 unsigned char *transfer_buffer; 320 char *string; 321 int retval = 0; 322 int i; 323 int num_ports = 0; 324 325 transfer_buffer = kmalloc(sizeof(*connection_info), GFP_KERNEL); 326 if (!transfer_buffer) 327 return -ENOMEM; 328 329 /* send a get connection info request */ 330 retval = usb_control_msg(serial->dev, 331 usb_rcvctrlpipe(serial->dev, 0), 332 VISOR_GET_CONNECTION_INFORMATION, 333 0xc2, 0x0000, 0x0000, transfer_buffer, 334 sizeof(*connection_info), 300); 335 if (retval < 0) { 336 dev_err(dev, "%s - error %d getting connection information\n", 337 __func__, retval); 338 goto exit; 339 } 340 341 if (retval == sizeof(*connection_info)) { 342 connection_info = (struct visor_connection_info *) 343 transfer_buffer; 344 345 num_ports = le16_to_cpu(connection_info->num_ports); 346 for (i = 0; i < num_ports; ++i) { 347 switch ( 348 connection_info->connections[i].port_function_id) { 349 case VISOR_FUNCTION_GENERIC: 350 string = "Generic"; 351 break; 352 case VISOR_FUNCTION_DEBUGGER: 353 string = "Debugger"; 354 break; 355 case VISOR_FUNCTION_HOTSYNC: 356 string = "HotSync"; 357 break; 358 case VISOR_FUNCTION_CONSOLE: 359 string = "Console"; 360 break; 361 case VISOR_FUNCTION_REMOTE_FILE_SYS: 362 string = "Remote File System"; 363 break; 364 default: 365 string = "unknown"; 366 break; 367 } 368 dev_info(dev, "%s: port %d, is for %s use\n", 369 serial->type->description, 370 connection_info->connections[i].port, string); 371 } 372 } 373 /* 374 * Handle devices that report invalid stuff here. 375 */ 376 if (num_ports == 0 || num_ports > 2) { 377 dev_warn(dev, "%s: No valid connect info available\n", 378 serial->type->description); 379 num_ports = 2; 380 } 381 382 dev_info(dev, "%s: Number of ports: %d\n", serial->type->description, 383 num_ports); 384 385 /* 386 * save off our num_ports info so that we can use it in the 387 * calc_num_ports callback 388 */ 389 usb_set_serial_data(serial, (void *)(long)num_ports); 390 391 /* ask for the number of bytes available, but ignore the 392 response as it is broken */ 393 retval = usb_control_msg(serial->dev, 394 usb_rcvctrlpipe(serial->dev, 0), 395 VISOR_REQUEST_BYTES_AVAILABLE, 396 0xc2, 0x0000, 0x0005, transfer_buffer, 397 0x02, 300); 398 if (retval < 0) 399 dev_err(dev, "%s - error %d getting bytes available request\n", 400 __func__, retval); 401 retval = 0; 402 403 exit: 404 kfree(transfer_buffer); 405 406 return retval; 407 } 408 409 static int palm_os_4_probe(struct usb_serial *serial, 410 const struct usb_device_id *id) 411 { 412 struct device *dev = &serial->dev->dev; 413 struct palm_ext_connection_info *connection_info; 414 unsigned char *transfer_buffer; 415 int retval; 416 417 transfer_buffer = kmalloc(sizeof(*connection_info), GFP_KERNEL); 418 if (!transfer_buffer) 419 return -ENOMEM; 420 421 retval = usb_control_msg(serial->dev, 422 usb_rcvctrlpipe(serial->dev, 0), 423 PALM_GET_EXT_CONNECTION_INFORMATION, 424 0xc2, 0x0000, 0x0000, transfer_buffer, 425 sizeof(*connection_info), 300); 426 if (retval < 0) 427 dev_err(dev, "%s - error %d getting connection info\n", 428 __func__, retval); 429 else 430 usb_serial_debug_data(dev, __func__, retval, transfer_buffer); 431 432 kfree(transfer_buffer); 433 return 0; 434 } 435 436 437 static int visor_probe(struct usb_serial *serial, 438 const struct usb_device_id *id) 439 { 440 int retval = 0; 441 int (*startup)(struct usb_serial *serial, 442 const struct usb_device_id *id); 443 444 /* 445 * some Samsung Android phones in modem mode have the same ID 446 * as SPH-I500, but they are ACM devices, so dont bind to them 447 */ 448 if (id->idVendor == SAMSUNG_VENDOR_ID && 449 id->idProduct == SAMSUNG_SPH_I500_ID && 450 serial->dev->descriptor.bDeviceClass == USB_CLASS_COMM && 451 serial->dev->descriptor.bDeviceSubClass == 452 USB_CDC_SUBCLASS_ACM) 453 return -ENODEV; 454 455 if (serial->dev->actconfig->desc.bConfigurationValue != 1) { 456 dev_err(&serial->dev->dev, "active config #%d != 1 ??\n", 457 serial->dev->actconfig->desc.bConfigurationValue); 458 return -ENODEV; 459 } 460 461 if (id->driver_info) { 462 startup = (void *)id->driver_info; 463 retval = startup(serial, id); 464 } 465 466 return retval; 467 } 468 469 static int visor_calc_num_ports(struct usb_serial *serial, 470 struct usb_serial_endpoints *epds) 471 { 472 unsigned int vid = le16_to_cpu(serial->dev->descriptor.idVendor); 473 int num_ports = (int)(long)(usb_get_serial_data(serial)); 474 475 if (num_ports) 476 usb_set_serial_data(serial, NULL); 477 478 /* 479 * Only swap the bulk endpoints for the Handspring devices with 480 * interrupt in endpoints, which for now are the Treo devices. 481 */ 482 if (!(vid == HANDSPRING_VENDOR_ID || vid == KYOCERA_VENDOR_ID) || 483 epds->num_interrupt_in == 0) 484 goto out; 485 486 if (epds->num_bulk_in < 2 || epds->num_interrupt_in < 2) { 487 dev_err(&serial->interface->dev, "missing endpoints\n"); 488 return -ENODEV; 489 } 490 491 /* 492 * It appears that Treos and Kyoceras want to use the 493 * 1st bulk in endpoint to communicate with the 2nd bulk out endpoint, 494 * so let's swap the 1st and 2nd bulk in and interrupt endpoints. 495 * Note that swapping the bulk out endpoints would break lots of 496 * apps that want to communicate on the second port. 497 */ 498 swap(epds->bulk_in[0], epds->bulk_in[1]); 499 swap(epds->interrupt_in[0], epds->interrupt_in[1]); 500 out: 501 return num_ports; 502 } 503 504 static int clie_5_calc_num_ports(struct usb_serial *serial, 505 struct usb_serial_endpoints *epds) 506 { 507 /* 508 * TH55 registers 2 ports. 509 * Communication in from the UX50/TH55 uses the first bulk-in 510 * endpoint, while communication out to the UX50/TH55 uses the second 511 * bulk-out endpoint. 512 */ 513 514 /* 515 * FIXME: Should we swap the descriptors instead of using the same 516 * bulk-out endpoint for both ports? 517 */ 518 epds->bulk_out[0] = epds->bulk_out[1]; 519 520 return serial->type->num_ports; 521 } 522 523 static int clie_3_5_startup(struct usb_serial *serial) 524 { 525 struct device *dev = &serial->dev->dev; 526 int result; 527 u8 *data; 528 529 data = kmalloc(1, GFP_KERNEL); 530 if (!data) 531 return -ENOMEM; 532 533 /* 534 * Note that PEG-300 series devices expect the following two calls. 535 */ 536 537 /* get the config number */ 538 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 539 USB_REQ_GET_CONFIGURATION, USB_DIR_IN, 540 0, 0, data, 1, 3000); 541 if (result < 0) { 542 dev_err(dev, "%s: get config number failed: %d\n", 543 __func__, result); 544 goto out; 545 } 546 if (result != 1) { 547 dev_err(dev, "%s: get config number bad return length: %d\n", 548 __func__, result); 549 result = -EIO; 550 goto out; 551 } 552 553 /* get the interface number */ 554 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 555 USB_REQ_GET_INTERFACE, 556 USB_DIR_IN | USB_RECIP_INTERFACE, 557 0, 0, data, 1, 3000); 558 if (result < 0) { 559 dev_err(dev, "%s: get interface number failed: %d\n", 560 __func__, result); 561 goto out; 562 } 563 if (result != 1) { 564 dev_err(dev, 565 "%s: get interface number bad return length: %d\n", 566 __func__, result); 567 result = -EIO; 568 goto out; 569 } 570 571 result = 0; 572 out: 573 kfree(data); 574 575 return result; 576 } 577 578 module_usb_serial_driver(serial_drivers, id_table_combined); 579 580 MODULE_AUTHOR(DRIVER_AUTHOR); 581 MODULE_DESCRIPTION(DRIVER_DESC); 582 MODULE_LICENSE("GPL"); 583