1 // SPDX-License-Identifier: GPL-2.0 2 /* 3 * USB HandSpring Visor, Palm m50x, and Sony Clie driver 4 * (supports all of the Palm OS USB devices) 5 * 6 * Copyright (C) 1999 - 2004 7 * Greg Kroah-Hartman (greg@kroah.com) 8 * 9 * This program is free software; you can redistribute it and/or 10 * modify it under the terms of the GNU General Public License version 11 * 2 as published by the Free Software Foundation. 12 * 13 * See Documentation/usb/usb-serial.txt for more information on using this 14 * driver 15 * 16 */ 17 18 #include <linux/kernel.h> 19 #include <linux/errno.h> 20 #include <linux/slab.h> 21 #include <linux/tty.h> 22 #include <linux/tty_driver.h> 23 #include <linux/tty_flip.h> 24 #include <linux/module.h> 25 #include <linux/moduleparam.h> 26 #include <linux/spinlock.h> 27 #include <linux/uaccess.h> 28 #include <linux/usb.h> 29 #include <linux/usb/serial.h> 30 #include <linux/usb/cdc.h> 31 #include "visor.h" 32 33 /* 34 * Version Information 35 */ 36 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>" 37 #define DRIVER_DESC "USB HandSpring Visor / Palm OS driver" 38 39 /* function prototypes for a handspring visor */ 40 static int visor_open(struct tty_struct *tty, struct usb_serial_port *port); 41 static void visor_close(struct usb_serial_port *port); 42 static int visor_probe(struct usb_serial *serial, 43 const struct usb_device_id *id); 44 static int visor_calc_num_ports(struct usb_serial *serial, 45 struct usb_serial_endpoints *epds); 46 static int clie_5_calc_num_ports(struct usb_serial *serial, 47 struct usb_serial_endpoints *epds); 48 static void visor_read_int_callback(struct urb *urb); 49 static int clie_3_5_startup(struct usb_serial *serial); 50 static int palm_os_3_probe(struct usb_serial *serial, 51 const struct usb_device_id *id); 52 static int palm_os_4_probe(struct usb_serial *serial, 53 const struct usb_device_id *id); 54 55 static const struct usb_device_id id_table[] = { 56 { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_VISOR_ID), 57 .driver_info = (kernel_ulong_t)&palm_os_3_probe }, 58 { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_TREO_ID), 59 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 60 { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_TREO600_ID), 61 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 62 { USB_DEVICE(GSPDA_VENDOR_ID, GSPDA_XPLORE_M68_ID), 63 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 64 { USB_DEVICE(PALM_VENDOR_ID, PALM_M500_ID), 65 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 66 { USB_DEVICE(PALM_VENDOR_ID, PALM_M505_ID), 67 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 68 { USB_DEVICE(PALM_VENDOR_ID, PALM_M515_ID), 69 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 70 { USB_DEVICE(PALM_VENDOR_ID, PALM_I705_ID), 71 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 72 { USB_DEVICE(PALM_VENDOR_ID, PALM_M100_ID), 73 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 74 { USB_DEVICE(PALM_VENDOR_ID, PALM_M125_ID), 75 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 76 { USB_DEVICE(PALM_VENDOR_ID, PALM_M130_ID), 77 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 78 { USB_DEVICE(PALM_VENDOR_ID, PALM_TUNGSTEN_T_ID), 79 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 80 { USB_DEVICE(PALM_VENDOR_ID, PALM_TREO_650), 81 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 82 { USB_DEVICE(PALM_VENDOR_ID, PALM_TUNGSTEN_Z_ID), 83 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 84 { USB_DEVICE(PALM_VENDOR_ID, PALM_ZIRE_ID), 85 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 86 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_4_0_ID), 87 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 88 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_S360_ID), 89 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 90 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_4_1_ID), 91 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 92 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_NX60_ID), 93 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 94 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_NZ90V_ID), 95 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 96 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_TJ25_ID), 97 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 98 { USB_DEVICE(ACER_VENDOR_ID, ACER_S10_ID), 99 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 100 { USB_DEVICE_INTERFACE_CLASS(SAMSUNG_VENDOR_ID, SAMSUNG_SCH_I330_ID, 0xff), 101 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 102 { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_SPH_I500_ID), 103 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 104 { USB_DEVICE(TAPWAVE_VENDOR_ID, TAPWAVE_ZODIAC_ID), 105 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 106 { USB_DEVICE(GARMIN_VENDOR_ID, GARMIN_IQUE_3600_ID), 107 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 108 { USB_DEVICE(ACEECA_VENDOR_ID, ACEECA_MEZ1000_ID), 109 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 110 { USB_DEVICE(KYOCERA_VENDOR_ID, KYOCERA_7135_ID), 111 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 112 { USB_DEVICE(FOSSIL_VENDOR_ID, FOSSIL_ABACUS_ID), 113 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 114 { } /* Terminating entry */ 115 }; 116 117 static const struct usb_device_id clie_id_5_table[] = { 118 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_UX50_ID), 119 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 120 { } /* Terminating entry */ 121 }; 122 123 static const struct usb_device_id clie_id_3_5_table[] = { 124 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_3_5_ID) }, 125 { } /* Terminating entry */ 126 }; 127 128 static const struct usb_device_id id_table_combined[] = { 129 { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_VISOR_ID) }, 130 { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_TREO_ID) }, 131 { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_TREO600_ID) }, 132 { USB_DEVICE(GSPDA_VENDOR_ID, GSPDA_XPLORE_M68_ID) }, 133 { USB_DEVICE(PALM_VENDOR_ID, PALM_M500_ID) }, 134 { USB_DEVICE(PALM_VENDOR_ID, PALM_M505_ID) }, 135 { USB_DEVICE(PALM_VENDOR_ID, PALM_M515_ID) }, 136 { USB_DEVICE(PALM_VENDOR_ID, PALM_I705_ID) }, 137 { USB_DEVICE(PALM_VENDOR_ID, PALM_M100_ID) }, 138 { USB_DEVICE(PALM_VENDOR_ID, PALM_M125_ID) }, 139 { USB_DEVICE(PALM_VENDOR_ID, PALM_M130_ID) }, 140 { USB_DEVICE(PALM_VENDOR_ID, PALM_TUNGSTEN_T_ID) }, 141 { USB_DEVICE(PALM_VENDOR_ID, PALM_TREO_650) }, 142 { USB_DEVICE(PALM_VENDOR_ID, PALM_TUNGSTEN_Z_ID) }, 143 { USB_DEVICE(PALM_VENDOR_ID, PALM_ZIRE_ID) }, 144 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_3_5_ID) }, 145 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_4_0_ID) }, 146 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_S360_ID) }, 147 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_4_1_ID) }, 148 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_NX60_ID) }, 149 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_NZ90V_ID) }, 150 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_UX50_ID) }, 151 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_TJ25_ID) }, 152 { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_SCH_I330_ID) }, 153 { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_SPH_I500_ID) }, 154 { USB_DEVICE(TAPWAVE_VENDOR_ID, TAPWAVE_ZODIAC_ID) }, 155 { USB_DEVICE(GARMIN_VENDOR_ID, GARMIN_IQUE_3600_ID) }, 156 { USB_DEVICE(ACEECA_VENDOR_ID, ACEECA_MEZ1000_ID) }, 157 { USB_DEVICE(KYOCERA_VENDOR_ID, KYOCERA_7135_ID) }, 158 { USB_DEVICE(FOSSIL_VENDOR_ID, FOSSIL_ABACUS_ID) }, 159 { } /* Terminating entry */ 160 }; 161 162 MODULE_DEVICE_TABLE(usb, id_table_combined); 163 164 /* All of the device info needed for the Handspring Visor, 165 and Palm 4.0 devices */ 166 static struct usb_serial_driver handspring_device = { 167 .driver = { 168 .owner = THIS_MODULE, 169 .name = "visor", 170 }, 171 .description = "Handspring Visor / Palm OS", 172 .id_table = id_table, 173 .num_ports = 2, 174 .bulk_out_size = 256, 175 .open = visor_open, 176 .close = visor_close, 177 .throttle = usb_serial_generic_throttle, 178 .unthrottle = usb_serial_generic_unthrottle, 179 .probe = visor_probe, 180 .calc_num_ports = visor_calc_num_ports, 181 .read_int_callback = visor_read_int_callback, 182 }; 183 184 /* All of the device info needed for the Clie UX50, TH55 Palm 5.0 devices */ 185 static struct usb_serial_driver clie_5_device = { 186 .driver = { 187 .owner = THIS_MODULE, 188 .name = "clie_5", 189 }, 190 .description = "Sony Clie 5.0", 191 .id_table = clie_id_5_table, 192 .num_ports = 2, 193 .num_bulk_out = 2, 194 .bulk_out_size = 256, 195 .open = visor_open, 196 .close = visor_close, 197 .throttle = usb_serial_generic_throttle, 198 .unthrottle = usb_serial_generic_unthrottle, 199 .probe = visor_probe, 200 .calc_num_ports = clie_5_calc_num_ports, 201 .read_int_callback = visor_read_int_callback, 202 }; 203 204 /* device info for the Sony Clie OS version 3.5 */ 205 static struct usb_serial_driver clie_3_5_device = { 206 .driver = { 207 .owner = THIS_MODULE, 208 .name = "clie_3.5", 209 }, 210 .description = "Sony Clie 3.5", 211 .id_table = clie_id_3_5_table, 212 .num_ports = 1, 213 .bulk_out_size = 256, 214 .open = visor_open, 215 .close = visor_close, 216 .throttle = usb_serial_generic_throttle, 217 .unthrottle = usb_serial_generic_unthrottle, 218 .attach = clie_3_5_startup, 219 }; 220 221 static struct usb_serial_driver * const serial_drivers[] = { 222 &handspring_device, &clie_5_device, &clie_3_5_device, NULL 223 }; 224 225 /****************************************************************************** 226 * Handspring Visor specific driver functions 227 ******************************************************************************/ 228 static int visor_open(struct tty_struct *tty, struct usb_serial_port *port) 229 { 230 int result = 0; 231 232 if (!port->read_urb) { 233 /* this is needed for some brain dead Sony devices */ 234 dev_err(&port->dev, "Device lied about number of ports, please use a lower one.\n"); 235 return -ENODEV; 236 } 237 238 /* Start reading from the device */ 239 result = usb_serial_generic_open(tty, port); 240 if (result) 241 goto exit; 242 243 if (port->interrupt_in_urb) { 244 dev_dbg(&port->dev, "adding interrupt input for treo\n"); 245 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); 246 if (result) 247 dev_err(&port->dev, 248 "%s - failed submitting interrupt urb, error %d\n", 249 __func__, result); 250 } 251 exit: 252 return result; 253 } 254 255 256 static void visor_close(struct usb_serial_port *port) 257 { 258 unsigned char *transfer_buffer; 259 260 usb_serial_generic_close(port); 261 usb_kill_urb(port->interrupt_in_urb); 262 263 transfer_buffer = kmalloc(0x12, GFP_KERNEL); 264 if (!transfer_buffer) 265 return; 266 usb_control_msg(port->serial->dev, 267 usb_rcvctrlpipe(port->serial->dev, 0), 268 VISOR_CLOSE_NOTIFICATION, 0xc2, 269 0x0000, 0x0000, 270 transfer_buffer, 0x12, 300); 271 kfree(transfer_buffer); 272 } 273 274 static void visor_read_int_callback(struct urb *urb) 275 { 276 struct usb_serial_port *port = urb->context; 277 int status = urb->status; 278 int result; 279 280 switch (status) { 281 case 0: 282 /* success */ 283 break; 284 case -ECONNRESET: 285 case -ENOENT: 286 case -ESHUTDOWN: 287 /* this urb is terminated, clean up */ 288 dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n", 289 __func__, status); 290 return; 291 default: 292 dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n", 293 __func__, status); 294 goto exit; 295 } 296 297 /* 298 * This information is still unknown what it can be used for. 299 * If anyone has an idea, please let the author know... 300 * 301 * Rumor has it this endpoint is used to notify when data 302 * is ready to be read from the bulk ones. 303 */ 304 usb_serial_debug_data(&port->dev, __func__, urb->actual_length, 305 urb->transfer_buffer); 306 307 exit: 308 result = usb_submit_urb(urb, GFP_ATOMIC); 309 if (result) 310 dev_err(&urb->dev->dev, 311 "%s - Error %d submitting interrupt urb\n", 312 __func__, result); 313 } 314 315 static int palm_os_3_probe(struct usb_serial *serial, 316 const struct usb_device_id *id) 317 { 318 struct device *dev = &serial->dev->dev; 319 struct visor_connection_info *connection_info; 320 unsigned char *transfer_buffer; 321 char *string; 322 int retval = 0; 323 int i; 324 int num_ports = 0; 325 326 transfer_buffer = kmalloc(sizeof(*connection_info), GFP_KERNEL); 327 if (!transfer_buffer) 328 return -ENOMEM; 329 330 /* send a get connection info request */ 331 retval = usb_control_msg(serial->dev, 332 usb_rcvctrlpipe(serial->dev, 0), 333 VISOR_GET_CONNECTION_INFORMATION, 334 0xc2, 0x0000, 0x0000, transfer_buffer, 335 sizeof(*connection_info), 300); 336 if (retval < 0) { 337 dev_err(dev, "%s - error %d getting connection information\n", 338 __func__, retval); 339 goto exit; 340 } 341 342 if (retval == sizeof(*connection_info)) { 343 connection_info = (struct visor_connection_info *) 344 transfer_buffer; 345 346 num_ports = le16_to_cpu(connection_info->num_ports); 347 for (i = 0; i < num_ports; ++i) { 348 switch ( 349 connection_info->connections[i].port_function_id) { 350 case VISOR_FUNCTION_GENERIC: 351 string = "Generic"; 352 break; 353 case VISOR_FUNCTION_DEBUGGER: 354 string = "Debugger"; 355 break; 356 case VISOR_FUNCTION_HOTSYNC: 357 string = "HotSync"; 358 break; 359 case VISOR_FUNCTION_CONSOLE: 360 string = "Console"; 361 break; 362 case VISOR_FUNCTION_REMOTE_FILE_SYS: 363 string = "Remote File System"; 364 break; 365 default: 366 string = "unknown"; 367 break; 368 } 369 dev_info(dev, "%s: port %d, is for %s use\n", 370 serial->type->description, 371 connection_info->connections[i].port, string); 372 } 373 } 374 /* 375 * Handle devices that report invalid stuff here. 376 */ 377 if (num_ports == 0 || num_ports > 2) { 378 dev_warn(dev, "%s: No valid connect info available\n", 379 serial->type->description); 380 num_ports = 2; 381 } 382 383 dev_info(dev, "%s: Number of ports: %d\n", serial->type->description, 384 num_ports); 385 386 /* 387 * save off our num_ports info so that we can use it in the 388 * calc_num_ports callback 389 */ 390 usb_set_serial_data(serial, (void *)(long)num_ports); 391 392 /* ask for the number of bytes available, but ignore the 393 response as it is broken */ 394 retval = usb_control_msg(serial->dev, 395 usb_rcvctrlpipe(serial->dev, 0), 396 VISOR_REQUEST_BYTES_AVAILABLE, 397 0xc2, 0x0000, 0x0005, transfer_buffer, 398 0x02, 300); 399 if (retval < 0) 400 dev_err(dev, "%s - error %d getting bytes available request\n", 401 __func__, retval); 402 retval = 0; 403 404 exit: 405 kfree(transfer_buffer); 406 407 return retval; 408 } 409 410 static int palm_os_4_probe(struct usb_serial *serial, 411 const struct usb_device_id *id) 412 { 413 struct device *dev = &serial->dev->dev; 414 struct palm_ext_connection_info *connection_info; 415 unsigned char *transfer_buffer; 416 int retval; 417 418 transfer_buffer = kmalloc(sizeof(*connection_info), GFP_KERNEL); 419 if (!transfer_buffer) 420 return -ENOMEM; 421 422 retval = usb_control_msg(serial->dev, 423 usb_rcvctrlpipe(serial->dev, 0), 424 PALM_GET_EXT_CONNECTION_INFORMATION, 425 0xc2, 0x0000, 0x0000, transfer_buffer, 426 sizeof(*connection_info), 300); 427 if (retval < 0) 428 dev_err(dev, "%s - error %d getting connection info\n", 429 __func__, retval); 430 else 431 usb_serial_debug_data(dev, __func__, retval, transfer_buffer); 432 433 kfree(transfer_buffer); 434 return 0; 435 } 436 437 438 static int visor_probe(struct usb_serial *serial, 439 const struct usb_device_id *id) 440 { 441 int retval = 0; 442 int (*startup)(struct usb_serial *serial, 443 const struct usb_device_id *id); 444 445 /* 446 * some Samsung Android phones in modem mode have the same ID 447 * as SPH-I500, but they are ACM devices, so dont bind to them 448 */ 449 if (id->idVendor == SAMSUNG_VENDOR_ID && 450 id->idProduct == SAMSUNG_SPH_I500_ID && 451 serial->dev->descriptor.bDeviceClass == USB_CLASS_COMM && 452 serial->dev->descriptor.bDeviceSubClass == 453 USB_CDC_SUBCLASS_ACM) 454 return -ENODEV; 455 456 if (serial->dev->actconfig->desc.bConfigurationValue != 1) { 457 dev_err(&serial->dev->dev, "active config #%d != 1 ??\n", 458 serial->dev->actconfig->desc.bConfigurationValue); 459 return -ENODEV; 460 } 461 462 if (id->driver_info) { 463 startup = (void *)id->driver_info; 464 retval = startup(serial, id); 465 } 466 467 return retval; 468 } 469 470 static int visor_calc_num_ports(struct usb_serial *serial, 471 struct usb_serial_endpoints *epds) 472 { 473 unsigned int vid = le16_to_cpu(serial->dev->descriptor.idVendor); 474 int num_ports = (int)(long)(usb_get_serial_data(serial)); 475 476 if (num_ports) 477 usb_set_serial_data(serial, NULL); 478 479 /* 480 * Only swap the bulk endpoints for the Handspring devices with 481 * interrupt in endpoints, which for now are the Treo devices. 482 */ 483 if (!(vid == HANDSPRING_VENDOR_ID || vid == KYOCERA_VENDOR_ID) || 484 epds->num_interrupt_in == 0) 485 goto out; 486 487 if (epds->num_bulk_in < 2 || epds->num_interrupt_in < 2) { 488 dev_err(&serial->interface->dev, "missing endpoints\n"); 489 return -ENODEV; 490 } 491 492 /* 493 * It appears that Treos and Kyoceras want to use the 494 * 1st bulk in endpoint to communicate with the 2nd bulk out endpoint, 495 * so let's swap the 1st and 2nd bulk in and interrupt endpoints. 496 * Note that swapping the bulk out endpoints would break lots of 497 * apps that want to communicate on the second port. 498 */ 499 swap(epds->bulk_in[0], epds->bulk_in[1]); 500 swap(epds->interrupt_in[0], epds->interrupt_in[1]); 501 out: 502 return num_ports; 503 } 504 505 static int clie_5_calc_num_ports(struct usb_serial *serial, 506 struct usb_serial_endpoints *epds) 507 { 508 /* 509 * TH55 registers 2 ports. 510 * Communication in from the UX50/TH55 uses the first bulk-in 511 * endpoint, while communication out to the UX50/TH55 uses the second 512 * bulk-out endpoint. 513 */ 514 515 /* 516 * FIXME: Should we swap the descriptors instead of using the same 517 * bulk-out endpoint for both ports? 518 */ 519 epds->bulk_out[0] = epds->bulk_out[1]; 520 521 return serial->type->num_ports; 522 } 523 524 static int clie_3_5_startup(struct usb_serial *serial) 525 { 526 struct device *dev = &serial->dev->dev; 527 int result; 528 u8 *data; 529 530 data = kmalloc(1, GFP_KERNEL); 531 if (!data) 532 return -ENOMEM; 533 534 /* 535 * Note that PEG-300 series devices expect the following two calls. 536 */ 537 538 /* get the config number */ 539 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 540 USB_REQ_GET_CONFIGURATION, USB_DIR_IN, 541 0, 0, data, 1, 3000); 542 if (result < 0) { 543 dev_err(dev, "%s: get config number failed: %d\n", 544 __func__, result); 545 goto out; 546 } 547 if (result != 1) { 548 dev_err(dev, "%s: get config number bad return length: %d\n", 549 __func__, result); 550 result = -EIO; 551 goto out; 552 } 553 554 /* get the interface number */ 555 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 556 USB_REQ_GET_INTERFACE, 557 USB_DIR_IN | USB_RECIP_INTERFACE, 558 0, 0, data, 1, 3000); 559 if (result < 0) { 560 dev_err(dev, "%s: get interface number failed: %d\n", 561 __func__, result); 562 goto out; 563 } 564 if (result != 1) { 565 dev_err(dev, 566 "%s: get interface number bad return length: %d\n", 567 __func__, result); 568 result = -EIO; 569 goto out; 570 } 571 572 result = 0; 573 out: 574 kfree(data); 575 576 return result; 577 } 578 579 module_usb_serial_driver(serial_drivers, id_table_combined); 580 581 MODULE_AUTHOR(DRIVER_AUTHOR); 582 MODULE_DESCRIPTION(DRIVER_DESC); 583 MODULE_LICENSE("GPL"); 584