1 /* 2 * KLSI KL5KUSB105 chip RS232 converter driver 3 * 4 * Copyright (C) 2010 Johan Hovold <jhovold@gmail.com> 5 * Copyright (C) 2001 Utz-Uwe Haus <haus@uuhaus.de> 6 * 7 * This program is free software; you can redistribute it and/or modify 8 * it under the terms of the GNU General Public License as published by 9 * the Free Software Foundation; either version 2 of the License, or 10 * (at your option) any later version. 11 * 12 * All information about the device was acquired using SniffUSB ans snoopUSB 13 * on Windows98. 14 * It was written out of frustration with the PalmConnect USB Serial adapter 15 * sold by Palm Inc. 16 * Neither Palm, nor their contractor (MCCI) or their supplier (KLSI) provided 17 * information that was not already available. 18 * 19 * It seems that KLSI bought some silicon-design information from ScanLogic, 20 * whose SL11R processor is at the core of the KL5KUSB chipset from KLSI. 21 * KLSI has firmware available for their devices; it is probable that the 22 * firmware differs from that used by KLSI in their products. If you have an 23 * original KLSI device and can provide some information on it, I would be 24 * most interested in adding support for it here. If you have any information 25 * on the protocol used (or find errors in my reverse-engineered stuff), please 26 * let me know. 27 * 28 * The code was only tested with a PalmConnect USB adapter; if you 29 * are adventurous, try it with any KLSI-based device and let me know how it 30 * breaks so that I can fix it! 31 */ 32 33 /* TODO: 34 * check modem line signals 35 * implement handshaking or decide that we do not support it 36 */ 37 38 #include <linux/kernel.h> 39 #include <linux/errno.h> 40 #include <linux/init.h> 41 #include <linux/slab.h> 42 #include <linux/tty.h> 43 #include <linux/tty_driver.h> 44 #include <linux/tty_flip.h> 45 #include <linux/module.h> 46 #include <linux/uaccess.h> 47 #include <asm/unaligned.h> 48 #include <linux/usb.h> 49 #include <linux/usb/serial.h> 50 #include "kl5kusb105.h" 51 52 static bool debug; 53 54 /* 55 * Version Information 56 */ 57 #define DRIVER_VERSION "v0.4" 58 #define DRIVER_AUTHOR "Utz-Uwe Haus <haus@uuhaus.de>, Johan Hovold <jhovold@gmail.com>" 59 #define DRIVER_DESC "KLSI KL5KUSB105 chipset USB->Serial Converter driver" 60 61 62 /* 63 * Function prototypes 64 */ 65 static int klsi_105_startup(struct usb_serial *serial); 66 static void klsi_105_release(struct usb_serial *serial); 67 static int klsi_105_open(struct tty_struct *tty, struct usb_serial_port *port); 68 static void klsi_105_close(struct usb_serial_port *port); 69 static void klsi_105_set_termios(struct tty_struct *tty, 70 struct usb_serial_port *port, struct ktermios *old); 71 static int klsi_105_tiocmget(struct tty_struct *tty); 72 static int klsi_105_tiocmset(struct tty_struct *tty, 73 unsigned int set, unsigned int clear); 74 static void klsi_105_process_read_urb(struct urb *urb); 75 static int klsi_105_prepare_write_buffer(struct usb_serial_port *port, 76 void *dest, size_t size); 77 78 /* 79 * All of the device info needed for the KLSI converters. 80 */ 81 static const struct usb_device_id id_table[] = { 82 { USB_DEVICE(PALMCONNECT_VID, PALMCONNECT_PID) }, 83 { USB_DEVICE(KLSI_VID, KLSI_KL5KUSB105D_PID) }, 84 { } /* Terminating entry */ 85 }; 86 87 MODULE_DEVICE_TABLE(usb, id_table); 88 89 static struct usb_driver kl5kusb105d_driver = { 90 .name = "kl5kusb105d", 91 .id_table = id_table, 92 }; 93 94 static struct usb_serial_driver kl5kusb105d_device = { 95 .driver = { 96 .owner = THIS_MODULE, 97 .name = "kl5kusb105d", 98 }, 99 .description = "KL5KUSB105D / PalmConnect", 100 .id_table = id_table, 101 .num_ports = 1, 102 .bulk_out_size = 64, 103 .open = klsi_105_open, 104 .close = klsi_105_close, 105 .set_termios = klsi_105_set_termios, 106 /*.break_ctl = klsi_105_break_ctl,*/ 107 .tiocmget = klsi_105_tiocmget, 108 .tiocmset = klsi_105_tiocmset, 109 .attach = klsi_105_startup, 110 .release = klsi_105_release, 111 .throttle = usb_serial_generic_throttle, 112 .unthrottle = usb_serial_generic_unthrottle, 113 .process_read_urb = klsi_105_process_read_urb, 114 .prepare_write_buffer = klsi_105_prepare_write_buffer, 115 }; 116 117 static struct usb_serial_driver * const serial_drivers[] = { 118 &kl5kusb105d_device, NULL 119 }; 120 121 struct klsi_105_port_settings { 122 __u8 pktlen; /* always 5, it seems */ 123 __u8 baudrate; 124 __u8 databits; 125 __u8 unknown1; 126 __u8 unknown2; 127 } __attribute__ ((packed)); 128 129 struct klsi_105_private { 130 struct klsi_105_port_settings cfg; 131 struct ktermios termios; 132 unsigned long line_state; /* modem line settings */ 133 spinlock_t lock; 134 }; 135 136 137 /* 138 * Handle vendor specific USB requests 139 */ 140 141 142 #define KLSI_TIMEOUT 5000 /* default urb timeout */ 143 144 static int klsi_105_chg_port_settings(struct usb_serial_port *port, 145 struct klsi_105_port_settings *settings) 146 { 147 int rc; 148 149 rc = usb_control_msg(port->serial->dev, 150 usb_sndctrlpipe(port->serial->dev, 0), 151 KL5KUSB105A_SIO_SET_DATA, 152 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_INTERFACE, 153 0, /* value */ 154 0, /* index */ 155 settings, 156 sizeof(struct klsi_105_port_settings), 157 KLSI_TIMEOUT); 158 if (rc < 0) 159 dev_err(&port->dev, 160 "Change port settings failed (error = %d)\n", rc); 161 dev_info(&port->serial->dev->dev, 162 "%d byte block, baudrate %x, databits %d, u1 %d, u2 %d\n", 163 settings->pktlen, settings->baudrate, settings->databits, 164 settings->unknown1, settings->unknown2); 165 return rc; 166 } 167 168 /* translate a 16-bit status value from the device to linux's TIO bits */ 169 static unsigned long klsi_105_status2linestate(const __u16 status) 170 { 171 unsigned long res = 0; 172 173 res = ((status & KL5KUSB105A_DSR) ? TIOCM_DSR : 0) 174 | ((status & KL5KUSB105A_CTS) ? TIOCM_CTS : 0) 175 ; 176 177 return res; 178 } 179 180 /* 181 * Read line control via vendor command and return result through 182 * *line_state_p 183 */ 184 /* It seems that the status buffer has always only 2 bytes length */ 185 #define KLSI_STATUSBUF_LEN 2 186 static int klsi_105_get_line_state(struct usb_serial_port *port, 187 unsigned long *line_state_p) 188 { 189 int rc; 190 u8 *status_buf; 191 __u16 status; 192 193 dev_info(&port->serial->dev->dev, "sending SIO Poll request\n"); 194 195 status_buf = kmalloc(KLSI_STATUSBUF_LEN, GFP_KERNEL); 196 if (!status_buf) { 197 dev_err(&port->dev, "%s - out of memory for status buffer.\n", 198 __func__); 199 return -ENOMEM; 200 } 201 status_buf[0] = 0xff; 202 status_buf[1] = 0xff; 203 rc = usb_control_msg(port->serial->dev, 204 usb_rcvctrlpipe(port->serial->dev, 0), 205 KL5KUSB105A_SIO_POLL, 206 USB_TYPE_VENDOR | USB_DIR_IN, 207 0, /* value */ 208 0, /* index */ 209 status_buf, KLSI_STATUSBUF_LEN, 210 10000 211 ); 212 if (rc < 0) 213 dev_err(&port->dev, "Reading line status failed (error = %d)\n", 214 rc); 215 else { 216 status = get_unaligned_le16(status_buf); 217 218 dev_info(&port->serial->dev->dev, "read status %x %x", 219 status_buf[0], status_buf[1]); 220 221 *line_state_p = klsi_105_status2linestate(status); 222 } 223 224 kfree(status_buf); 225 return rc; 226 } 227 228 229 /* 230 * Driver's tty interface functions 231 */ 232 233 static int klsi_105_startup(struct usb_serial *serial) 234 { 235 struct klsi_105_private *priv; 236 int i; 237 238 /* check if we support the product id (see keyspan.c) 239 * FIXME 240 */ 241 242 /* allocate the private data structure */ 243 for (i = 0; i < serial->num_ports; i++) { 244 priv = kmalloc(sizeof(struct klsi_105_private), 245 GFP_KERNEL); 246 if (!priv) { 247 dbg("%skmalloc for klsi_105_private failed.", __func__); 248 i--; 249 goto err_cleanup; 250 } 251 /* set initial values for control structures */ 252 priv->cfg.pktlen = 5; 253 priv->cfg.baudrate = kl5kusb105a_sio_b9600; 254 priv->cfg.databits = kl5kusb105a_dtb_8; 255 priv->cfg.unknown1 = 0; 256 priv->cfg.unknown2 = 1; 257 258 priv->line_state = 0; 259 260 usb_set_serial_port_data(serial->port[i], priv); 261 262 spin_lock_init(&priv->lock); 263 264 /* priv->termios is left uninitialized until port opening */ 265 init_waitqueue_head(&serial->port[i]->write_wait); 266 } 267 268 return 0; 269 270 err_cleanup: 271 for (; i >= 0; i--) { 272 priv = usb_get_serial_port_data(serial->port[i]); 273 kfree(priv); 274 usb_set_serial_port_data(serial->port[i], NULL); 275 } 276 return -ENOMEM; 277 } 278 279 static void klsi_105_release(struct usb_serial *serial) 280 { 281 int i; 282 283 for (i = 0; i < serial->num_ports; ++i) 284 kfree(usb_get_serial_port_data(serial->port[i])); 285 } 286 287 static int klsi_105_open(struct tty_struct *tty, struct usb_serial_port *port) 288 { 289 struct klsi_105_private *priv = usb_get_serial_port_data(port); 290 int retval = 0; 291 int rc; 292 int i; 293 unsigned long line_state; 294 struct klsi_105_port_settings *cfg; 295 unsigned long flags; 296 297 /* Do a defined restart: 298 * Set up sane default baud rate and send the 'READ_ON' 299 * vendor command. 300 * FIXME: set modem line control (how?) 301 * Then read the modem line control and store values in 302 * priv->line_state. 303 */ 304 cfg = kmalloc(sizeof(*cfg), GFP_KERNEL); 305 if (!cfg) { 306 dev_err(&port->dev, "%s - out of memory for config buffer.\n", 307 __func__); 308 return -ENOMEM; 309 } 310 cfg->pktlen = 5; 311 cfg->baudrate = kl5kusb105a_sio_b9600; 312 cfg->databits = kl5kusb105a_dtb_8; 313 cfg->unknown1 = 0; 314 cfg->unknown2 = 1; 315 klsi_105_chg_port_settings(port, cfg); 316 317 /* set up termios structure */ 318 spin_lock_irqsave(&priv->lock, flags); 319 priv->termios.c_iflag = tty->termios->c_iflag; 320 priv->termios.c_oflag = tty->termios->c_oflag; 321 priv->termios.c_cflag = tty->termios->c_cflag; 322 priv->termios.c_lflag = tty->termios->c_lflag; 323 for (i = 0; i < NCCS; i++) 324 priv->termios.c_cc[i] = tty->termios->c_cc[i]; 325 priv->cfg.pktlen = cfg->pktlen; 326 priv->cfg.baudrate = cfg->baudrate; 327 priv->cfg.databits = cfg->databits; 328 priv->cfg.unknown1 = cfg->unknown1; 329 priv->cfg.unknown2 = cfg->unknown2; 330 spin_unlock_irqrestore(&priv->lock, flags); 331 332 /* READ_ON and urb submission */ 333 rc = usb_serial_generic_open(tty, port); 334 if (rc) { 335 retval = rc; 336 goto exit; 337 } 338 339 rc = usb_control_msg(port->serial->dev, 340 usb_sndctrlpipe(port->serial->dev, 0), 341 KL5KUSB105A_SIO_CONFIGURE, 342 USB_TYPE_VENDOR|USB_DIR_OUT|USB_RECIP_INTERFACE, 343 KL5KUSB105A_SIO_CONFIGURE_READ_ON, 344 0, /* index */ 345 NULL, 346 0, 347 KLSI_TIMEOUT); 348 if (rc < 0) { 349 dev_err(&port->dev, "Enabling read failed (error = %d)\n", rc); 350 retval = rc; 351 } else 352 dbg("%s - enabled reading", __func__); 353 354 rc = klsi_105_get_line_state(port, &line_state); 355 if (rc >= 0) { 356 spin_lock_irqsave(&priv->lock, flags); 357 priv->line_state = line_state; 358 spin_unlock_irqrestore(&priv->lock, flags); 359 dbg("%s - read line state 0x%lx", __func__, line_state); 360 retval = 0; 361 } else 362 retval = rc; 363 364 exit: 365 kfree(cfg); 366 return retval; 367 } 368 369 static void klsi_105_close(struct usb_serial_port *port) 370 { 371 int rc; 372 373 mutex_lock(&port->serial->disc_mutex); 374 if (!port->serial->disconnected) { 375 /* send READ_OFF */ 376 rc = usb_control_msg(port->serial->dev, 377 usb_sndctrlpipe(port->serial->dev, 0), 378 KL5KUSB105A_SIO_CONFIGURE, 379 USB_TYPE_VENDOR | USB_DIR_OUT, 380 KL5KUSB105A_SIO_CONFIGURE_READ_OFF, 381 0, /* index */ 382 NULL, 0, 383 KLSI_TIMEOUT); 384 if (rc < 0) 385 dev_err(&port->dev, 386 "Disabling read failed (error = %d)\n", rc); 387 } 388 mutex_unlock(&port->serial->disc_mutex); 389 390 /* shutdown our bulk reads and writes */ 391 usb_serial_generic_close(port); 392 393 /* wgg - do I need this? I think so. */ 394 usb_kill_urb(port->interrupt_in_urb); 395 } 396 397 /* We need to write a complete 64-byte data block and encode the 398 * number actually sent in the first double-byte, LSB-order. That 399 * leaves at most 62 bytes of payload. 400 */ 401 #define KLSI_HDR_LEN 2 402 static int klsi_105_prepare_write_buffer(struct usb_serial_port *port, 403 void *dest, size_t size) 404 { 405 unsigned char *buf = dest; 406 int count; 407 408 count = kfifo_out_locked(&port->write_fifo, buf + KLSI_HDR_LEN, size, 409 &port->lock); 410 put_unaligned_le16(count, buf); 411 412 return count + KLSI_HDR_LEN; 413 } 414 415 /* The data received is preceded by a length double-byte in LSB-first order. 416 */ 417 static void klsi_105_process_read_urb(struct urb *urb) 418 { 419 struct usb_serial_port *port = urb->context; 420 unsigned char *data = urb->transfer_buffer; 421 struct tty_struct *tty; 422 unsigned len; 423 424 /* empty urbs seem to happen, we ignore them */ 425 if (!urb->actual_length) 426 return; 427 428 if (urb->actual_length <= KLSI_HDR_LEN) { 429 dbg("%s - malformed packet", __func__); 430 return; 431 } 432 433 tty = tty_port_tty_get(&port->port); 434 if (!tty) 435 return; 436 437 len = get_unaligned_le16(data); 438 if (len > urb->actual_length - KLSI_HDR_LEN) { 439 dbg("%s - packet length mismatch", __func__); 440 len = urb->actual_length - KLSI_HDR_LEN; 441 } 442 443 tty_insert_flip_string(tty, data + KLSI_HDR_LEN, len); 444 tty_flip_buffer_push(tty); 445 tty_kref_put(tty); 446 } 447 448 static void klsi_105_set_termios(struct tty_struct *tty, 449 struct usb_serial_port *port, 450 struct ktermios *old_termios) 451 { 452 struct klsi_105_private *priv = usb_get_serial_port_data(port); 453 unsigned int iflag = tty->termios->c_iflag; 454 unsigned int old_iflag = old_termios->c_iflag; 455 unsigned int cflag = tty->termios->c_cflag; 456 unsigned int old_cflag = old_termios->c_cflag; 457 struct klsi_105_port_settings *cfg; 458 unsigned long flags; 459 speed_t baud; 460 461 cfg = kmalloc(sizeof(*cfg), GFP_KERNEL); 462 if (!cfg) { 463 dev_err(&port->dev, "%s - out of memory for config buffer.\n", 464 __func__); 465 return; 466 } 467 468 /* lock while we are modifying the settings */ 469 spin_lock_irqsave(&priv->lock, flags); 470 471 /* 472 * Update baud rate 473 */ 474 baud = tty_get_baud_rate(tty); 475 476 if ((cflag & CBAUD) != (old_cflag & CBAUD)) { 477 /* reassert DTR and (maybe) RTS on transition from B0 */ 478 if ((old_cflag & CBAUD) == B0) { 479 dbg("%s: baud was B0", __func__); 480 #if 0 481 priv->control_state |= TIOCM_DTR; 482 /* don't set RTS if using hardware flow control */ 483 if (!(old_cflag & CRTSCTS)) 484 priv->control_state |= TIOCM_RTS; 485 mct_u232_set_modem_ctrl(serial, priv->control_state); 486 #endif 487 } 488 } 489 switch (baud) { 490 case 0: /* handled below */ 491 break; 492 case 1200: 493 priv->cfg.baudrate = kl5kusb105a_sio_b1200; 494 break; 495 case 2400: 496 priv->cfg.baudrate = kl5kusb105a_sio_b2400; 497 break; 498 case 4800: 499 priv->cfg.baudrate = kl5kusb105a_sio_b4800; 500 break; 501 case 9600: 502 priv->cfg.baudrate = kl5kusb105a_sio_b9600; 503 break; 504 case 19200: 505 priv->cfg.baudrate = kl5kusb105a_sio_b19200; 506 break; 507 case 38400: 508 priv->cfg.baudrate = kl5kusb105a_sio_b38400; 509 break; 510 case 57600: 511 priv->cfg.baudrate = kl5kusb105a_sio_b57600; 512 break; 513 case 115200: 514 priv->cfg.baudrate = kl5kusb105a_sio_b115200; 515 break; 516 default: 517 dbg("KLSI USB->Serial converter:" 518 " unsupported baudrate request, using default of 9600"); 519 priv->cfg.baudrate = kl5kusb105a_sio_b9600; 520 baud = 9600; 521 break; 522 } 523 if ((cflag & CBAUD) == B0) { 524 dbg("%s: baud is B0", __func__); 525 /* Drop RTS and DTR */ 526 /* maybe this should be simulated by sending read 527 * disable and read enable messages? 528 */ 529 ; 530 #if 0 531 priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS); 532 mct_u232_set_modem_ctrl(serial, priv->control_state); 533 #endif 534 } 535 tty_encode_baud_rate(tty, baud, baud); 536 537 if ((cflag & CSIZE) != (old_cflag & CSIZE)) { 538 /* set the number of data bits */ 539 switch (cflag & CSIZE) { 540 case CS5: 541 dbg("%s - 5 bits/byte not supported", __func__); 542 spin_unlock_irqrestore(&priv->lock, flags); 543 goto err; 544 case CS6: 545 dbg("%s - 6 bits/byte not supported", __func__); 546 spin_unlock_irqrestore(&priv->lock, flags); 547 goto err; 548 case CS7: 549 priv->cfg.databits = kl5kusb105a_dtb_7; 550 break; 551 case CS8: 552 priv->cfg.databits = kl5kusb105a_dtb_8; 553 break; 554 default: 555 dev_err(&port->dev, 556 "CSIZE was not CS5-CS8, using default of 8\n"); 557 priv->cfg.databits = kl5kusb105a_dtb_8; 558 break; 559 } 560 } 561 562 /* 563 * Update line control register (LCR) 564 */ 565 if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD)) 566 || (cflag & CSTOPB) != (old_cflag & CSTOPB)) { 567 /* Not currently supported */ 568 tty->termios->c_cflag &= ~(PARENB|PARODD|CSTOPB); 569 #if 0 570 priv->last_lcr = 0; 571 572 /* set the parity */ 573 if (cflag & PARENB) 574 priv->last_lcr |= (cflag & PARODD) ? 575 MCT_U232_PARITY_ODD : MCT_U232_PARITY_EVEN; 576 else 577 priv->last_lcr |= MCT_U232_PARITY_NONE; 578 579 /* set the number of stop bits */ 580 priv->last_lcr |= (cflag & CSTOPB) ? 581 MCT_U232_STOP_BITS_2 : MCT_U232_STOP_BITS_1; 582 583 mct_u232_set_line_ctrl(serial, priv->last_lcr); 584 #endif 585 ; 586 } 587 /* 588 * Set flow control: well, I do not really now how to handle DTR/RTS. 589 * Just do what we have seen with SniffUSB on Win98. 590 */ 591 if ((iflag & IXOFF) != (old_iflag & IXOFF) 592 || (iflag & IXON) != (old_iflag & IXON) 593 || (cflag & CRTSCTS) != (old_cflag & CRTSCTS)) { 594 /* Not currently supported */ 595 tty->termios->c_cflag &= ~CRTSCTS; 596 /* Drop DTR/RTS if no flow control otherwise assert */ 597 #if 0 598 if ((iflag & IXOFF) || (iflag & IXON) || (cflag & CRTSCTS)) 599 priv->control_state |= TIOCM_DTR | TIOCM_RTS; 600 else 601 priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS); 602 mct_u232_set_modem_ctrl(serial, priv->control_state); 603 #endif 604 ; 605 } 606 memcpy(cfg, &priv->cfg, sizeof(*cfg)); 607 spin_unlock_irqrestore(&priv->lock, flags); 608 609 /* now commit changes to device */ 610 klsi_105_chg_port_settings(port, cfg); 611 err: 612 kfree(cfg); 613 } 614 615 #if 0 616 static void mct_u232_break_ctl(struct tty_struct *tty, int break_state) 617 { 618 struct usb_serial_port *port = tty->driver_data; 619 struct usb_serial *serial = port->serial; 620 struct mct_u232_private *priv = 621 (struct mct_u232_private *)port->private; 622 unsigned char lcr = priv->last_lcr; 623 624 dbg("%sstate=%d", __func__, break_state); 625 626 /* LOCKING */ 627 if (break_state) 628 lcr |= MCT_U232_SET_BREAK; 629 630 mct_u232_set_line_ctrl(serial, lcr); 631 } 632 #endif 633 634 static int klsi_105_tiocmget(struct tty_struct *tty) 635 { 636 struct usb_serial_port *port = tty->driver_data; 637 struct klsi_105_private *priv = usb_get_serial_port_data(port); 638 unsigned long flags; 639 int rc; 640 unsigned long line_state; 641 642 rc = klsi_105_get_line_state(port, &line_state); 643 if (rc < 0) { 644 dev_err(&port->dev, 645 "Reading line control failed (error = %d)\n", rc); 646 /* better return value? EAGAIN? */ 647 return rc; 648 } 649 650 spin_lock_irqsave(&priv->lock, flags); 651 priv->line_state = line_state; 652 spin_unlock_irqrestore(&priv->lock, flags); 653 dbg("%s - read line state 0x%lx", __func__, line_state); 654 return (int)line_state; 655 } 656 657 static int klsi_105_tiocmset(struct tty_struct *tty, 658 unsigned int set, unsigned int clear) 659 { 660 int retval = -EINVAL; 661 662 /* if this ever gets implemented, it should be done something like this: 663 struct usb_serial *serial = port->serial; 664 struct klsi_105_private *priv = usb_get_serial_port_data(port); 665 unsigned long flags; 666 int control; 667 668 spin_lock_irqsave (&priv->lock, flags); 669 if (set & TIOCM_RTS) 670 priv->control_state |= TIOCM_RTS; 671 if (set & TIOCM_DTR) 672 priv->control_state |= TIOCM_DTR; 673 if (clear & TIOCM_RTS) 674 priv->control_state &= ~TIOCM_RTS; 675 if (clear & TIOCM_DTR) 676 priv->control_state &= ~TIOCM_DTR; 677 control = priv->control_state; 678 spin_unlock_irqrestore (&priv->lock, flags); 679 retval = mct_u232_set_modem_ctrl(serial, control); 680 */ 681 return retval; 682 } 683 684 module_usb_serial_driver(kl5kusb105d_driver, serial_drivers); 685 686 MODULE_AUTHOR(DRIVER_AUTHOR); 687 MODULE_DESCRIPTION(DRIVER_DESC); 688 MODULE_LICENSE("GPL"); 689 690 module_param(debug, bool, S_IRUGO | S_IWUSR); 691 MODULE_PARM_DESC(debug, "enable extensive debugging messages"); 692