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 * See Documentation/usb/usb-serial.rst for more information on using this 10 * driver 11 * 12 */ 13 14 #include <linux/kernel.h> 15 #include <linux/errno.h> 16 #include <linux/slab.h> 17 #include <linux/tty.h> 18 #include <linux/tty_driver.h> 19 #include <linux/tty_flip.h> 20 #include <linux/module.h> 21 #include <linux/moduleparam.h> 22 #include <linux/spinlock.h> 23 #include <linux/uaccess.h> 24 #include <linux/usb.h> 25 #include <linux/usb/serial.h> 26 #include <linux/usb/cdc.h> 27 #include "visor.h" 28 29 /* 30 * Version Information 31 */ 32 #define DRIVER_AUTHOR "Greg Kroah-Hartman <greg@kroah.com>" 33 #define DRIVER_DESC "USB HandSpring Visor / Palm OS driver" 34 35 /* function prototypes for a handspring visor */ 36 static int visor_open(struct tty_struct *tty, struct usb_serial_port *port); 37 static void visor_close(struct usb_serial_port *port); 38 static int visor_probe(struct usb_serial *serial, 39 const struct usb_device_id *id); 40 static int visor_calc_num_ports(struct usb_serial *serial, 41 struct usb_serial_endpoints *epds); 42 static int clie_5_calc_num_ports(struct usb_serial *serial, 43 struct usb_serial_endpoints *epds); 44 static void visor_read_int_callback(struct urb *urb); 45 static int clie_3_5_startup(struct usb_serial *serial); 46 static int palm_os_3_probe(struct usb_serial *serial, 47 const struct usb_device_id *id); 48 static int palm_os_4_probe(struct usb_serial *serial, 49 const struct usb_device_id *id); 50 51 static const struct usb_device_id id_table[] = { 52 { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_VISOR_ID), 53 .driver_info = (kernel_ulong_t)&palm_os_3_probe }, 54 { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_TREO_ID), 55 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 56 { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_TREO600_ID), 57 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 58 { USB_DEVICE(GSPDA_VENDOR_ID, GSPDA_XPLORE_M68_ID), 59 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 60 { USB_DEVICE(PALM_VENDOR_ID, PALM_M500_ID), 61 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 62 { USB_DEVICE(PALM_VENDOR_ID, PALM_M505_ID), 63 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 64 { USB_DEVICE(PALM_VENDOR_ID, PALM_M515_ID), 65 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 66 { USB_DEVICE(PALM_VENDOR_ID, PALM_I705_ID), 67 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 68 { USB_DEVICE(PALM_VENDOR_ID, PALM_M100_ID), 69 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 70 { USB_DEVICE(PALM_VENDOR_ID, PALM_M125_ID), 71 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 72 { USB_DEVICE(PALM_VENDOR_ID, PALM_M130_ID), 73 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 74 { USB_DEVICE(PALM_VENDOR_ID, PALM_TUNGSTEN_T_ID), 75 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 76 { USB_DEVICE(PALM_VENDOR_ID, PALM_TREO_650), 77 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 78 { USB_DEVICE(PALM_VENDOR_ID, PALM_TUNGSTEN_Z_ID), 79 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 80 { USB_DEVICE(PALM_VENDOR_ID, PALM_ZIRE_ID), 81 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 82 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_4_0_ID), 83 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 84 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_S360_ID), 85 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 86 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_4_1_ID), 87 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 88 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_NX60_ID), 89 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 90 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_NZ90V_ID), 91 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 92 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_TJ25_ID), 93 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 94 { USB_DEVICE(ACER_VENDOR_ID, ACER_S10_ID), 95 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 96 { USB_DEVICE_INTERFACE_CLASS(SAMSUNG_VENDOR_ID, SAMSUNG_SCH_I330_ID, 0xff), 97 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 98 { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_SPH_I500_ID), 99 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 100 { USB_DEVICE(TAPWAVE_VENDOR_ID, TAPWAVE_ZODIAC_ID), 101 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 102 { USB_DEVICE(GARMIN_VENDOR_ID, GARMIN_IQUE_3600_ID), 103 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 104 { USB_DEVICE(ACEECA_VENDOR_ID, ACEECA_MEZ1000_ID), 105 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 106 { USB_DEVICE(KYOCERA_VENDOR_ID, KYOCERA_7135_ID), 107 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 108 { USB_DEVICE(FOSSIL_VENDOR_ID, FOSSIL_ABACUS_ID), 109 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 110 { } /* Terminating entry */ 111 }; 112 113 static const struct usb_device_id clie_id_5_table[] = { 114 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_UX50_ID), 115 .driver_info = (kernel_ulong_t)&palm_os_4_probe }, 116 { } /* Terminating entry */ 117 }; 118 119 static const struct usb_device_id clie_id_3_5_table[] = { 120 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_3_5_ID) }, 121 { } /* Terminating entry */ 122 }; 123 124 static const struct usb_device_id id_table_combined[] = { 125 { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_VISOR_ID) }, 126 { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_TREO_ID) }, 127 { USB_DEVICE(HANDSPRING_VENDOR_ID, HANDSPRING_TREO600_ID) }, 128 { USB_DEVICE(GSPDA_VENDOR_ID, GSPDA_XPLORE_M68_ID) }, 129 { USB_DEVICE(PALM_VENDOR_ID, PALM_M500_ID) }, 130 { USB_DEVICE(PALM_VENDOR_ID, PALM_M505_ID) }, 131 { USB_DEVICE(PALM_VENDOR_ID, PALM_M515_ID) }, 132 { USB_DEVICE(PALM_VENDOR_ID, PALM_I705_ID) }, 133 { USB_DEVICE(PALM_VENDOR_ID, PALM_M100_ID) }, 134 { USB_DEVICE(PALM_VENDOR_ID, PALM_M125_ID) }, 135 { USB_DEVICE(PALM_VENDOR_ID, PALM_M130_ID) }, 136 { USB_DEVICE(PALM_VENDOR_ID, PALM_TUNGSTEN_T_ID) }, 137 { USB_DEVICE(PALM_VENDOR_ID, PALM_TREO_650) }, 138 { USB_DEVICE(PALM_VENDOR_ID, PALM_TUNGSTEN_Z_ID) }, 139 { USB_DEVICE(PALM_VENDOR_ID, PALM_ZIRE_ID) }, 140 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_3_5_ID) }, 141 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_4_0_ID) }, 142 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_S360_ID) }, 143 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_4_1_ID) }, 144 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_NX60_ID) }, 145 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_NZ90V_ID) }, 146 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_UX50_ID) }, 147 { USB_DEVICE(SONY_VENDOR_ID, SONY_CLIE_TJ25_ID) }, 148 { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_SCH_I330_ID) }, 149 { USB_DEVICE(SAMSUNG_VENDOR_ID, SAMSUNG_SPH_I500_ID) }, 150 { USB_DEVICE(TAPWAVE_VENDOR_ID, TAPWAVE_ZODIAC_ID) }, 151 { USB_DEVICE(GARMIN_VENDOR_ID, GARMIN_IQUE_3600_ID) }, 152 { USB_DEVICE(ACEECA_VENDOR_ID, ACEECA_MEZ1000_ID) }, 153 { USB_DEVICE(KYOCERA_VENDOR_ID, KYOCERA_7135_ID) }, 154 { USB_DEVICE(FOSSIL_VENDOR_ID, FOSSIL_ABACUS_ID) }, 155 { } /* Terminating entry */ 156 }; 157 158 MODULE_DEVICE_TABLE(usb, id_table_combined); 159 160 /* All of the device info needed for the Handspring Visor, 161 and Palm 4.0 devices */ 162 static struct usb_serial_driver handspring_device = { 163 .driver = { 164 .name = "visor", 165 }, 166 .description = "Handspring Visor / Palm OS", 167 .id_table = id_table, 168 .num_ports = 2, 169 .bulk_out_size = 256, 170 .open = visor_open, 171 .close = visor_close, 172 .throttle = usb_serial_generic_throttle, 173 .unthrottle = usb_serial_generic_unthrottle, 174 .probe = visor_probe, 175 .calc_num_ports = visor_calc_num_ports, 176 .read_int_callback = visor_read_int_callback, 177 }; 178 179 /* All of the device info needed for the Clie UX50, TH55 Palm 5.0 devices */ 180 static struct usb_serial_driver clie_5_device = { 181 .driver = { 182 .name = "clie_5", 183 }, 184 .description = "Sony Clie 5.0", 185 .id_table = clie_id_5_table, 186 .num_ports = 2, 187 .num_bulk_out = 2, 188 .bulk_out_size = 256, 189 .open = visor_open, 190 .close = visor_close, 191 .throttle = usb_serial_generic_throttle, 192 .unthrottle = usb_serial_generic_unthrottle, 193 .probe = visor_probe, 194 .calc_num_ports = clie_5_calc_num_ports, 195 .read_int_callback = visor_read_int_callback, 196 }; 197 198 /* device info for the Sony Clie OS version 3.5 */ 199 static struct usb_serial_driver clie_3_5_device = { 200 .driver = { 201 .name = "clie_3.5", 202 }, 203 .description = "Sony Clie 3.5", 204 .id_table = clie_id_3_5_table, 205 .num_ports = 1, 206 .bulk_out_size = 256, 207 .open = visor_open, 208 .close = visor_close, 209 .throttle = usb_serial_generic_throttle, 210 .unthrottle = usb_serial_generic_unthrottle, 211 .attach = clie_3_5_startup, 212 }; 213 214 static struct usb_serial_driver * const serial_drivers[] = { 215 &handspring_device, &clie_5_device, &clie_3_5_device, NULL 216 }; 217 218 /****************************************************************************** 219 * Handspring Visor specific driver functions 220 ******************************************************************************/ 221 static int visor_open(struct tty_struct *tty, struct usb_serial_port *port) 222 { 223 int result = 0; 224 225 if (!port->read_urb) { 226 /* this is needed for some brain dead Sony devices */ 227 dev_err(&port->dev, "Device lied about number of ports, please use a lower one.\n"); 228 return -ENODEV; 229 } 230 231 /* Start reading from the device */ 232 result = usb_serial_generic_open(tty, port); 233 if (result) 234 goto exit; 235 236 if (port->interrupt_in_urb) { 237 dev_dbg(&port->dev, "adding interrupt input for treo\n"); 238 result = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); 239 if (result) 240 dev_err(&port->dev, 241 "%s - failed submitting interrupt urb, error %d\n", 242 __func__, result); 243 } 244 exit: 245 return result; 246 } 247 248 249 static void visor_close(struct usb_serial_port *port) 250 { 251 unsigned char *transfer_buffer; 252 253 usb_serial_generic_close(port); 254 usb_kill_urb(port->interrupt_in_urb); 255 256 transfer_buffer = kmalloc(0x12, GFP_KERNEL); 257 if (!transfer_buffer) 258 return; 259 usb_control_msg(port->serial->dev, 260 usb_rcvctrlpipe(port->serial->dev, 0), 261 VISOR_CLOSE_NOTIFICATION, 0xc2, 262 0x0000, 0x0000, 263 transfer_buffer, 0x12, 300); 264 kfree(transfer_buffer); 265 } 266 267 static void visor_read_int_callback(struct urb *urb) 268 { 269 struct usb_serial_port *port = urb->context; 270 int status = urb->status; 271 int result; 272 273 switch (status) { 274 case 0: 275 /* success */ 276 break; 277 case -ECONNRESET: 278 case -ENOENT: 279 case -ESHUTDOWN: 280 /* this urb is terminated, clean up */ 281 dev_dbg(&port->dev, "%s - urb shutting down with status: %d\n", 282 __func__, status); 283 return; 284 default: 285 dev_dbg(&port->dev, "%s - nonzero urb status received: %d\n", 286 __func__, status); 287 goto exit; 288 } 289 290 /* 291 * This information is still unknown what it can be used for. 292 * If anyone has an idea, please let the author know... 293 * 294 * Rumor has it this endpoint is used to notify when data 295 * is ready to be read from the bulk ones. 296 */ 297 usb_serial_debug_data(&port->dev, __func__, urb->actual_length, 298 urb->transfer_buffer); 299 300 exit: 301 result = usb_submit_urb(urb, GFP_ATOMIC); 302 if (result) 303 dev_err(&urb->dev->dev, 304 "%s - Error %d submitting interrupt urb\n", 305 __func__, result); 306 } 307 308 static int palm_os_3_probe(struct usb_serial *serial, 309 const struct usb_device_id *id) 310 { 311 struct device *dev = &serial->dev->dev; 312 struct visor_connection_info *connection_info; 313 unsigned char *transfer_buffer; 314 char *string; 315 int retval = 0; 316 int i; 317 int num_ports = 0; 318 319 transfer_buffer = kmalloc(sizeof(*connection_info), GFP_KERNEL); 320 if (!transfer_buffer) 321 return -ENOMEM; 322 323 /* send a get connection info request */ 324 retval = usb_control_msg(serial->dev, 325 usb_rcvctrlpipe(serial->dev, 0), 326 VISOR_GET_CONNECTION_INFORMATION, 327 0xc2, 0x0000, 0x0000, transfer_buffer, 328 sizeof(*connection_info), 300); 329 if (retval < 0) { 330 dev_err(dev, "%s - error %d getting connection information\n", 331 __func__, retval); 332 goto exit; 333 } 334 335 if (retval != sizeof(*connection_info)) { 336 dev_err(dev, "Invalid connection information received from device\n"); 337 retval = -ENODEV; 338 goto exit; 339 } 340 341 connection_info = (struct visor_connection_info *)transfer_buffer; 342 343 num_ports = le16_to_cpu(connection_info->num_ports); 344 345 /* Handle devices that report invalid stuff here. */ 346 if (num_ports == 0 || num_ports > 2) { 347 dev_warn(dev, "%s: No valid connect info available\n", 348 serial->type->description); 349 num_ports = 2; 350 } 351 352 for (i = 0; i < num_ports; ++i) { 353 switch (connection_info->connections[i].port_function_id) { 354 case VISOR_FUNCTION_GENERIC: 355 string = "Generic"; 356 break; 357 case VISOR_FUNCTION_DEBUGGER: 358 string = "Debugger"; 359 break; 360 case VISOR_FUNCTION_HOTSYNC: 361 string = "HotSync"; 362 break; 363 case VISOR_FUNCTION_CONSOLE: 364 string = "Console"; 365 break; 366 case VISOR_FUNCTION_REMOTE_FILE_SYS: 367 string = "Remote File System"; 368 break; 369 default: 370 string = "unknown"; 371 break; 372 } 373 dev_info(dev, "%s: port %d, is for %s use\n", 374 serial->type->description, 375 connection_info->connections[i].port, string); 376 } 377 dev_info(dev, "%s: Number of ports: %d\n", serial->type->description, 378 num_ports); 379 380 /* 381 * save off our num_ports info so that we can use it in the 382 * calc_num_ports callback 383 */ 384 usb_set_serial_data(serial, (void *)(long)num_ports); 385 386 /* ask for the number of bytes available, but ignore the 387 response as it is broken */ 388 retval = usb_control_msg(serial->dev, 389 usb_rcvctrlpipe(serial->dev, 0), 390 VISOR_REQUEST_BYTES_AVAILABLE, 391 0xc2, 0x0000, 0x0005, transfer_buffer, 392 0x02, 300); 393 if (retval < 0) 394 dev_err(dev, "%s - error %d getting bytes available request\n", 395 __func__, retval); 396 retval = 0; 397 398 exit: 399 kfree(transfer_buffer); 400 401 return retval; 402 } 403 404 static int palm_os_4_probe(struct usb_serial *serial, 405 const struct usb_device_id *id) 406 { 407 struct device *dev = &serial->dev->dev; 408 struct palm_ext_connection_info *connection_info; 409 unsigned char *transfer_buffer; 410 int retval; 411 412 transfer_buffer = kmalloc(sizeof(*connection_info), GFP_KERNEL); 413 if (!transfer_buffer) 414 return -ENOMEM; 415 416 retval = usb_control_msg(serial->dev, 417 usb_rcvctrlpipe(serial->dev, 0), 418 PALM_GET_EXT_CONNECTION_INFORMATION, 419 0xc2, 0x0000, 0x0000, transfer_buffer, 420 sizeof(*connection_info), 300); 421 if (retval < 0) 422 dev_err(dev, "%s - error %d getting connection info\n", 423 __func__, retval); 424 else 425 usb_serial_debug_data(dev, __func__, retval, transfer_buffer); 426 427 kfree(transfer_buffer); 428 return 0; 429 } 430 431 432 static int visor_probe(struct usb_serial *serial, 433 const struct usb_device_id *id) 434 { 435 int retval = 0; 436 int (*startup)(struct usb_serial *serial, 437 const struct usb_device_id *id); 438 439 /* 440 * some Samsung Android phones in modem mode have the same ID 441 * as SPH-I500, but they are ACM devices, so dont bind to them 442 */ 443 if (id->idVendor == SAMSUNG_VENDOR_ID && 444 id->idProduct == SAMSUNG_SPH_I500_ID && 445 serial->dev->descriptor.bDeviceClass == USB_CLASS_COMM && 446 serial->dev->descriptor.bDeviceSubClass == 447 USB_CDC_SUBCLASS_ACM) 448 return -ENODEV; 449 450 if (serial->dev->actconfig->desc.bConfigurationValue != 1) { 451 dev_err(&serial->dev->dev, "active config #%d != 1 ??\n", 452 serial->dev->actconfig->desc.bConfigurationValue); 453 return -ENODEV; 454 } 455 456 if (id->driver_info) { 457 startup = (void *)id->driver_info; 458 retval = startup(serial, id); 459 } 460 461 return retval; 462 } 463 464 static int visor_calc_num_ports(struct usb_serial *serial, 465 struct usb_serial_endpoints *epds) 466 { 467 unsigned int vid = le16_to_cpu(serial->dev->descriptor.idVendor); 468 int num_ports = (int)(long)(usb_get_serial_data(serial)); 469 470 if (num_ports) 471 usb_set_serial_data(serial, NULL); 472 473 /* 474 * Only swap the bulk endpoints for the Handspring devices with 475 * interrupt in endpoints, which for now are the Treo devices. 476 */ 477 if (!(vid == HANDSPRING_VENDOR_ID || vid == KYOCERA_VENDOR_ID) || 478 epds->num_interrupt_in == 0) 479 goto out; 480 481 if (epds->num_bulk_in < 2 || epds->num_interrupt_in < 2) { 482 dev_err(&serial->interface->dev, "missing endpoints\n"); 483 return -ENODEV; 484 } 485 486 /* 487 * It appears that Treos and Kyoceras want to use the 488 * 1st bulk in endpoint to communicate with the 2nd bulk out endpoint, 489 * so let's swap the 1st and 2nd bulk in and interrupt endpoints. 490 * Note that swapping the bulk out endpoints would break lots of 491 * apps that want to communicate on the second port. 492 */ 493 swap(epds->bulk_in[0], epds->bulk_in[1]); 494 swap(epds->interrupt_in[0], epds->interrupt_in[1]); 495 out: 496 return num_ports; 497 } 498 499 static int clie_5_calc_num_ports(struct usb_serial *serial, 500 struct usb_serial_endpoints *epds) 501 { 502 /* 503 * TH55 registers 2 ports. 504 * Communication in from the UX50/TH55 uses the first bulk-in 505 * endpoint, while communication out to the UX50/TH55 uses the second 506 * bulk-out endpoint. 507 */ 508 509 /* 510 * FIXME: Should we swap the descriptors instead of using the same 511 * bulk-out endpoint for both ports? 512 */ 513 epds->bulk_out[0] = epds->bulk_out[1]; 514 515 return serial->type->num_ports; 516 } 517 518 static int clie_3_5_startup(struct usb_serial *serial) 519 { 520 struct device *dev = &serial->dev->dev; 521 int result; 522 u8 *data; 523 524 data = kmalloc(1, GFP_KERNEL); 525 if (!data) 526 return -ENOMEM; 527 528 /* 529 * Note that PEG-300 series devices expect the following two calls. 530 */ 531 532 /* get the config number */ 533 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 534 USB_REQ_GET_CONFIGURATION, USB_DIR_IN, 535 0, 0, data, 1, 3000); 536 if (result < 0) { 537 dev_err(dev, "%s: get config number failed: %d\n", 538 __func__, result); 539 goto out; 540 } 541 if (result != 1) { 542 dev_err(dev, "%s: get config number bad return length: %d\n", 543 __func__, result); 544 result = -EIO; 545 goto out; 546 } 547 548 /* get the interface number */ 549 result = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 550 USB_REQ_GET_INTERFACE, 551 USB_DIR_IN | USB_RECIP_INTERFACE, 552 0, 0, data, 1, 3000); 553 if (result < 0) { 554 dev_err(dev, "%s: get interface number failed: %d\n", 555 __func__, result); 556 goto out; 557 } 558 if (result != 1) { 559 dev_err(dev, 560 "%s: get interface number bad return length: %d\n", 561 __func__, result); 562 result = -EIO; 563 goto out; 564 } 565 566 result = 0; 567 out: 568 kfree(data); 569 570 return result; 571 } 572 573 module_usb_serial_driver(serial_drivers, id_table_combined); 574 575 MODULE_AUTHOR(DRIVER_AUTHOR); 576 MODULE_DESCRIPTION(DRIVER_DESC); 577 MODULE_LICENSE("GPL v2"); 578