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 52static 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 */ 65static int klsi_105_startup(struct usb_serial *serial); 66static void klsi_105_release(struct usb_serial *serial); 67static int klsi_105_open(struct tty_struct *tty, struct usb_serial_port *port); 68static void klsi_105_close(struct usb_serial_port *port); 69static void klsi_105_set_termios(struct tty_struct *tty, 70 struct usb_serial_port *port, struct ktermios *old); 71static int klsi_105_tiocmget(struct tty_struct *tty); 72static int klsi_105_tiocmset(struct tty_struct *tty, 73 unsigned int set, unsigned int clear); 74static void klsi_105_process_read_urb(struct urb *urb); 75static 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 */ 81static 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 87MODULE_DEVICE_TABLE(usb, id_table); 88 89static struct usb_driver kl5kusb105d_driver = { 90 .name = "kl5kusb105d", 91 .probe = usb_serial_probe, 92 .disconnect = usb_serial_disconnect, 93 .id_table = id_table, 94}; 95 96static struct usb_serial_driver kl5kusb105d_device = { 97 .driver = { 98 .owner = THIS_MODULE, 99 .name = "kl5kusb105d", 100 }, 101 .description = "KL5KUSB105D / PalmConnect", 102 .id_table = id_table, 103 .num_ports = 1, 104 .bulk_out_size = 64, 105 .open = klsi_105_open, 106 .close = klsi_105_close, 107 .set_termios = klsi_105_set_termios, 108 /*.break_ctl = klsi_105_break_ctl,*/ 109 .tiocmget = klsi_105_tiocmget, 110 .tiocmset = klsi_105_tiocmset, 111 .attach = klsi_105_startup, 112 .release = klsi_105_release, 113 .throttle = usb_serial_generic_throttle, 114 .unthrottle = usb_serial_generic_unthrottle, 115 .process_read_urb = klsi_105_process_read_urb, 116 .prepare_write_buffer = klsi_105_prepare_write_buffer, 117}; 118 119static struct usb_serial_driver * const serial_drivers[] = { 120 &kl5kusb105d_device, NULL 121}; 122 123struct klsi_105_port_settings { 124 __u8 pktlen; /* always 5, it seems */ 125 __u8 baudrate; 126 __u8 databits; 127 __u8 unknown1; 128 __u8 unknown2; 129} __attribute__ ((packed)); 130 131struct klsi_105_private { 132 struct klsi_105_port_settings cfg; 133 struct ktermios termios; 134 unsigned long line_state; /* modem line settings */ 135 spinlock_t lock; 136}; 137 138 139/* 140 * Handle vendor specific USB requests 141 */ 142 143 144#define KLSI_TIMEOUT 5000 /* default urb timeout */ 145 146static int klsi_105_chg_port_settings(struct usb_serial_port *port, 147 struct klsi_105_port_settings *settings) 148{ 149 int rc; 150 151 rc = usb_control_msg(port->serial->dev, 152 usb_sndctrlpipe(port->serial->dev, 0), 153 KL5KUSB105A_SIO_SET_DATA, 154 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_INTERFACE, 155 0, /* value */ 156 0, /* index */ 157 settings, 158 sizeof(struct klsi_105_port_settings), 159 KLSI_TIMEOUT); 160 if (rc < 0) 161 dev_err(&port->dev, 162 "Change port settings failed (error = %d)\n", rc); 163 dev_info(&port->serial->dev->dev, 164 "%d byte block, baudrate %x, databits %d, u1 %d, u2 %d\n", 165 settings->pktlen, settings->baudrate, settings->databits, 166 settings->unknown1, settings->unknown2); 167 return rc; 168} 169 170/* translate a 16-bit status value from the device to linux's TIO bits */ 171static unsigned long klsi_105_status2linestate(const __u16 status) 172{ 173 unsigned long res = 0; 174 175 res = ((status & KL5KUSB105A_DSR) ? TIOCM_DSR : 0) 176 | ((status & KL5KUSB105A_CTS) ? TIOCM_CTS : 0) 177 ; 178 179 return res; 180} 181 182/* 183 * Read line control via vendor command and return result through 184 * *line_state_p 185 */ 186/* It seems that the status buffer has always only 2 bytes length */ 187#define KLSI_STATUSBUF_LEN 2 188static int klsi_105_get_line_state(struct usb_serial_port *port, 189 unsigned long *line_state_p) 190{ 191 int rc; 192 u8 *status_buf; 193 __u16 status; 194 195 dev_info(&port->serial->dev->dev, "sending SIO Poll request\n"); 196 197 status_buf = kmalloc(KLSI_STATUSBUF_LEN, GFP_KERNEL); 198 if (!status_buf) { 199 dev_err(&port->dev, "%s - out of memory for status buffer.\n", 200 __func__); 201 return -ENOMEM; 202 } 203 status_buf[0] = 0xff; 204 status_buf[1] = 0xff; 205 rc = usb_control_msg(port->serial->dev, 206 usb_rcvctrlpipe(port->serial->dev, 0), 207 KL5KUSB105A_SIO_POLL, 208 USB_TYPE_VENDOR | USB_DIR_IN, 209 0, /* value */ 210 0, /* index */ 211 status_buf, KLSI_STATUSBUF_LEN, 212 10000 213 ); 214 if (rc < 0) 215 dev_err(&port->dev, "Reading line status failed (error = %d)\n", 216 rc); 217 else { 218 status = get_unaligned_le16(status_buf); 219 220 dev_info(&port->serial->dev->dev, "read status %x %x", 221 status_buf[0], status_buf[1]); 222 223 *line_state_p = klsi_105_status2linestate(status); 224 } 225 226 kfree(status_buf); 227 return rc; 228} 229 230 231/* 232 * Driver's tty interface functions 233 */ 234 235static int klsi_105_startup(struct usb_serial *serial) 236{ 237 struct klsi_105_private *priv; 238 int i; 239 240 /* check if we support the product id (see keyspan.c) 241 * FIXME 242 */ 243 244 /* allocate the private data structure */ 245 for (i = 0; i < serial->num_ports; i++) { 246 priv = kmalloc(sizeof(struct klsi_105_private), 247 GFP_KERNEL); 248 if (!priv) { 249 dbg("%skmalloc for klsi_105_private failed.", __func__); 250 i--; 251 goto err_cleanup; 252 } 253 /* set initial values for control structures */ 254 priv->cfg.pktlen = 5; 255 priv->cfg.baudrate = kl5kusb105a_sio_b9600; 256 priv->cfg.databits = kl5kusb105a_dtb_8; 257 priv->cfg.unknown1 = 0; 258 priv->cfg.unknown2 = 1; 259 260 priv->line_state = 0; 261 262 usb_set_serial_port_data(serial->port[i], priv); 263 264 spin_lock_init(&priv->lock); 265 266 /* priv->termios is left uninitialized until port opening */ 267 init_waitqueue_head(&serial->port[i]->write_wait); 268 } 269 270 return 0; 271 272err_cleanup: 273 for (; i >= 0; i--) { 274 priv = usb_get_serial_port_data(serial->port[i]); 275 kfree(priv); 276 usb_set_serial_port_data(serial->port[i], NULL); 277 } 278 return -ENOMEM; 279} 280 281static void klsi_105_release(struct usb_serial *serial) 282{ 283 int i; 284 285 dbg("%s", __func__); 286 287 for (i = 0; i < serial->num_ports; ++i) 288 kfree(usb_get_serial_port_data(serial->port[i])); 289} 290 291static int klsi_105_open(struct tty_struct *tty, struct usb_serial_port *port) 292{ 293 struct klsi_105_private *priv = usb_get_serial_port_data(port); 294 int retval = 0; 295 int rc; 296 int i; 297 unsigned long line_state; 298 struct klsi_105_port_settings *cfg; 299 unsigned long flags; 300 301 dbg("%s port %d", __func__, port->number); 302 303 /* Do a defined restart: 304 * Set up sane default baud rate and send the 'READ_ON' 305 * vendor command. 306 * FIXME: set modem line control (how?) 307 * Then read the modem line control and store values in 308 * priv->line_state. 309 */ 310 cfg = kmalloc(sizeof(*cfg), GFP_KERNEL); 311 if (!cfg) { 312 dev_err(&port->dev, "%s - out of memory for config buffer.\n", 313 __func__); 314 return -ENOMEM; 315 } 316 cfg->pktlen = 5; 317 cfg->baudrate = kl5kusb105a_sio_b9600; 318 cfg->databits = kl5kusb105a_dtb_8; 319 cfg->unknown1 = 0; 320 cfg->unknown2 = 1; 321 klsi_105_chg_port_settings(port, cfg); 322 323 /* set up termios structure */ 324 spin_lock_irqsave(&priv->lock, flags); 325 priv->termios.c_iflag = tty->termios->c_iflag; 326 priv->termios.c_oflag = tty->termios->c_oflag; 327 priv->termios.c_cflag = tty->termios->c_cflag; 328 priv->termios.c_lflag = tty->termios->c_lflag; 329 for (i = 0; i < NCCS; i++) 330 priv->termios.c_cc[i] = tty->termios->c_cc[i]; 331 priv->cfg.pktlen = cfg->pktlen; 332 priv->cfg.baudrate = cfg->baudrate; 333 priv->cfg.databits = cfg->databits; 334 priv->cfg.unknown1 = cfg->unknown1; 335 priv->cfg.unknown2 = cfg->unknown2; 336 spin_unlock_irqrestore(&priv->lock, flags); 337 338 /* READ_ON and urb submission */ 339 rc = usb_serial_generic_open(tty, port); 340 if (rc) { 341 retval = rc; 342 goto exit; 343 } 344 345 rc = usb_control_msg(port->serial->dev, 346 usb_sndctrlpipe(port->serial->dev, 0), 347 KL5KUSB105A_SIO_CONFIGURE, 348 USB_TYPE_VENDOR|USB_DIR_OUT|USB_RECIP_INTERFACE, 349 KL5KUSB105A_SIO_CONFIGURE_READ_ON, 350 0, /* index */ 351 NULL, 352 0, 353 KLSI_TIMEOUT); 354 if (rc < 0) { 355 dev_err(&port->dev, "Enabling read failed (error = %d)\n", rc); 356 retval = rc; 357 } else 358 dbg("%s - enabled reading", __func__); 359 360 rc = klsi_105_get_line_state(port, &line_state); 361 if (rc >= 0) { 362 spin_lock_irqsave(&priv->lock, flags); 363 priv->line_state = line_state; 364 spin_unlock_irqrestore(&priv->lock, flags); 365 dbg("%s - read line state 0x%lx", __func__, line_state); 366 retval = 0; 367 } else 368 retval = rc; 369 370exit: 371 kfree(cfg); 372 return retval; 373} 374 375static void klsi_105_close(struct usb_serial_port *port) 376{ 377 int rc; 378 379 dbg("%s port %d", __func__, port->number); 380 381 mutex_lock(&port->serial->disc_mutex); 382 if (!port->serial->disconnected) { 383 /* send READ_OFF */ 384 rc = usb_control_msg(port->serial->dev, 385 usb_sndctrlpipe(port->serial->dev, 0), 386 KL5KUSB105A_SIO_CONFIGURE, 387 USB_TYPE_VENDOR | USB_DIR_OUT, 388 KL5KUSB105A_SIO_CONFIGURE_READ_OFF, 389 0, /* index */ 390 NULL, 0, 391 KLSI_TIMEOUT); 392 if (rc < 0) 393 dev_err(&port->dev, 394 "Disabling read failed (error = %d)\n", rc); 395 } 396 mutex_unlock(&port->serial->disc_mutex); 397 398 /* shutdown our bulk reads and writes */ 399 usb_serial_generic_close(port); 400 401 /* wgg - do I need this? I think so. */ 402 usb_kill_urb(port->interrupt_in_urb); 403} 404 405/* We need to write a complete 64-byte data block and encode the 406 * number actually sent in the first double-byte, LSB-order. That 407 * leaves at most 62 bytes of payload. 408 */ 409#define KLSI_HDR_LEN 2 410static int klsi_105_prepare_write_buffer(struct usb_serial_port *port, 411 void *dest, size_t size) 412{ 413 unsigned char *buf = dest; 414 int count; 415 416 count = kfifo_out_locked(&port->write_fifo, buf + KLSI_HDR_LEN, size, 417 &port->lock); 418 put_unaligned_le16(count, buf); 419 420 return count + KLSI_HDR_LEN; 421} 422 423/* The data received is preceded by a length double-byte in LSB-first order. 424 */ 425static void klsi_105_process_read_urb(struct urb *urb) 426{ 427 struct usb_serial_port *port = urb->context; 428 unsigned char *data = urb->transfer_buffer; 429 struct tty_struct *tty; 430 unsigned len; 431 432 /* empty urbs seem to happen, we ignore them */ 433 if (!urb->actual_length) 434 return; 435 436 if (urb->actual_length <= KLSI_HDR_LEN) { 437 dbg("%s - malformed packet", __func__); 438 return; 439 } 440 441 tty = tty_port_tty_get(&port->port); 442 if (!tty) 443 return; 444 445 len = get_unaligned_le16(data); 446 if (len > urb->actual_length - KLSI_HDR_LEN) { 447 dbg("%s - packet length mismatch", __func__); 448 len = urb->actual_length - KLSI_HDR_LEN; 449 } 450 451 tty_insert_flip_string(tty, data + KLSI_HDR_LEN, len); 452 tty_flip_buffer_push(tty); 453 tty_kref_put(tty); 454} 455 456static void klsi_105_set_termios(struct tty_struct *tty, 457 struct usb_serial_port *port, 458 struct ktermios *old_termios) 459{ 460 struct klsi_105_private *priv = usb_get_serial_port_data(port); 461 unsigned int iflag = tty->termios->c_iflag; 462 unsigned int old_iflag = old_termios->c_iflag; 463 unsigned int cflag = tty->termios->c_cflag; 464 unsigned int old_cflag = old_termios->c_cflag; 465 struct klsi_105_port_settings *cfg; 466 unsigned long flags; 467 speed_t baud; 468 469 cfg = kmalloc(sizeof(*cfg), GFP_KERNEL); 470 if (!cfg) { 471 dev_err(&port->dev, "%s - out of memory for config buffer.\n", 472 __func__); 473 return; 474 } 475 476 /* lock while we are modifying the settings */ 477 spin_lock_irqsave(&priv->lock, flags); 478 479 /* 480 * Update baud rate 481 */ 482 baud = tty_get_baud_rate(tty); 483 484 if ((cflag & CBAUD) != (old_cflag & CBAUD)) { 485 /* reassert DTR and (maybe) RTS on transition from B0 */ 486 if ((old_cflag & CBAUD) == B0) { 487 dbg("%s: baud was B0", __func__); 488#if 0 489 priv->control_state |= TIOCM_DTR; 490 /* don't set RTS if using hardware flow control */ 491 if (!(old_cflag & CRTSCTS)) 492 priv->control_state |= TIOCM_RTS; 493 mct_u232_set_modem_ctrl(serial, priv->control_state); 494#endif 495 } 496 } 497 switch (baud) { 498 case 0: /* handled below */ 499 break; 500 case 1200: 501 priv->cfg.baudrate = kl5kusb105a_sio_b1200; 502 break; 503 case 2400: 504 priv->cfg.baudrate = kl5kusb105a_sio_b2400; 505 break; 506 case 4800: 507 priv->cfg.baudrate = kl5kusb105a_sio_b4800; 508 break; 509 case 9600: 510 priv->cfg.baudrate = kl5kusb105a_sio_b9600; 511 break; 512 case 19200: 513 priv->cfg.baudrate = kl5kusb105a_sio_b19200; 514 break; 515 case 38400: 516 priv->cfg.baudrate = kl5kusb105a_sio_b38400; 517 break; 518 case 57600: 519 priv->cfg.baudrate = kl5kusb105a_sio_b57600; 520 break; 521 case 115200: 522 priv->cfg.baudrate = kl5kusb105a_sio_b115200; 523 break; 524 default: 525 dbg("KLSI USB->Serial converter:" 526 " unsupported baudrate request, using default of 9600"); 527 priv->cfg.baudrate = kl5kusb105a_sio_b9600; 528 baud = 9600; 529 break; 530 } 531 if ((cflag & CBAUD) == B0) { 532 dbg("%s: baud is B0", __func__); 533 /* Drop RTS and DTR */ 534 /* maybe this should be simulated by sending read 535 * disable and read enable messages? 536 */ 537 ; 538#if 0 539 priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS); 540 mct_u232_set_modem_ctrl(serial, priv->control_state); 541#endif 542 } 543 tty_encode_baud_rate(tty, baud, baud); 544 545 if ((cflag & CSIZE) != (old_cflag & CSIZE)) { 546 /* set the number of data bits */ 547 switch (cflag & CSIZE) { 548 case CS5: 549 dbg("%s - 5 bits/byte not supported", __func__); 550 spin_unlock_irqrestore(&priv->lock, flags); 551 goto err; 552 case CS6: 553 dbg("%s - 6 bits/byte not supported", __func__); 554 spin_unlock_irqrestore(&priv->lock, flags); 555 goto err; 556 case CS7: 557 priv->cfg.databits = kl5kusb105a_dtb_7; 558 break; 559 case CS8: 560 priv->cfg.databits = kl5kusb105a_dtb_8; 561 break; 562 default: 563 dev_err(&port->dev, 564 "CSIZE was not CS5-CS8, using default of 8\n"); 565 priv->cfg.databits = kl5kusb105a_dtb_8; 566 break; 567 } 568 } 569 570 /* 571 * Update line control register (LCR) 572 */ 573 if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD)) 574 || (cflag & CSTOPB) != (old_cflag & CSTOPB)) { 575 /* Not currently supported */ 576 tty->termios->c_cflag &= ~(PARENB|PARODD|CSTOPB); 577#if 0 578 priv->last_lcr = 0; 579 580 /* set the parity */ 581 if (cflag & PARENB) 582 priv->last_lcr |= (cflag & PARODD) ? 583 MCT_U232_PARITY_ODD : MCT_U232_PARITY_EVEN; 584 else 585 priv->last_lcr |= MCT_U232_PARITY_NONE; 586 587 /* set the number of stop bits */ 588 priv->last_lcr |= (cflag & CSTOPB) ? 589 MCT_U232_STOP_BITS_2 : MCT_U232_STOP_BITS_1; 590 591 mct_u232_set_line_ctrl(serial, priv->last_lcr); 592#endif 593 ; 594 } 595 /* 596 * Set flow control: well, I do not really now how to handle DTR/RTS. 597 * Just do what we have seen with SniffUSB on Win98. 598 */ 599 if ((iflag & IXOFF) != (old_iflag & IXOFF) 600 || (iflag & IXON) != (old_iflag & IXON) 601 || (cflag & CRTSCTS) != (old_cflag & CRTSCTS)) { 602 /* Not currently supported */ 603 tty->termios->c_cflag &= ~CRTSCTS; 604 /* Drop DTR/RTS if no flow control otherwise assert */ 605#if 0 606 if ((iflag & IXOFF) || (iflag & IXON) || (cflag & CRTSCTS)) 607 priv->control_state |= TIOCM_DTR | TIOCM_RTS; 608 else 609 priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS); 610 mct_u232_set_modem_ctrl(serial, priv->control_state); 611#endif 612 ; 613 } 614 memcpy(cfg, &priv->cfg, sizeof(*cfg)); 615 spin_unlock_irqrestore(&priv->lock, flags); 616 617 /* now commit changes to device */ 618 klsi_105_chg_port_settings(port, cfg); 619err: 620 kfree(cfg); 621} 622 623#if 0 624static void mct_u232_break_ctl(struct tty_struct *tty, int break_state) 625{ 626 struct usb_serial_port *port = tty->driver_data; 627 struct usb_serial *serial = port->serial; 628 struct mct_u232_private *priv = 629 (struct mct_u232_private *)port->private; 630 unsigned char lcr = priv->last_lcr; 631 632 dbg("%sstate=%d", __func__, break_state); 633 634 /* LOCKING */ 635 if (break_state) 636 lcr |= MCT_U232_SET_BREAK; 637 638 mct_u232_set_line_ctrl(serial, lcr); 639} 640#endif 641 642static int klsi_105_tiocmget(struct tty_struct *tty) 643{ 644 struct usb_serial_port *port = tty->driver_data; 645 struct klsi_105_private *priv = usb_get_serial_port_data(port); 646 unsigned long flags; 647 int rc; 648 unsigned long line_state; 649 dbg("%s - request, just guessing", __func__); 650 651 rc = klsi_105_get_line_state(port, &line_state); 652 if (rc < 0) { 653 dev_err(&port->dev, 654 "Reading line control failed (error = %d)\n", rc); 655 /* better return value? EAGAIN? */ 656 return rc; 657 } 658 659 spin_lock_irqsave(&priv->lock, flags); 660 priv->line_state = line_state; 661 spin_unlock_irqrestore(&priv->lock, flags); 662 dbg("%s - read line state 0x%lx", __func__, line_state); 663 return (int)line_state; 664} 665 666static int klsi_105_tiocmset(struct tty_struct *tty, 667 unsigned int set, unsigned int clear) 668{ 669 int retval = -EINVAL; 670 671 dbg("%s", __func__); 672 673/* if this ever gets implemented, it should be done something like this: 674 struct usb_serial *serial = port->serial; 675 struct klsi_105_private *priv = usb_get_serial_port_data(port); 676 unsigned long flags; 677 int control; 678 679 spin_lock_irqsave (&priv->lock, flags); 680 if (set & TIOCM_RTS) 681 priv->control_state |= TIOCM_RTS; 682 if (set & TIOCM_DTR) 683 priv->control_state |= TIOCM_DTR; 684 if (clear & TIOCM_RTS) 685 priv->control_state &= ~TIOCM_RTS; 686 if (clear & TIOCM_DTR) 687 priv->control_state &= ~TIOCM_DTR; 688 control = priv->control_state; 689 spin_unlock_irqrestore (&priv->lock, flags); 690 retval = mct_u232_set_modem_ctrl(serial, control); 691*/ 692 return retval; 693} 694 695module_usb_serial_driver(kl5kusb105d_driver, serial_drivers); 696 697MODULE_AUTHOR(DRIVER_AUTHOR); 698MODULE_DESCRIPTION(DRIVER_DESC); 699MODULE_LICENSE("GPL"); 700 701module_param(debug, bool, S_IRUGO | S_IWUSR); 702MODULE_PARM_DESC(debug, "enable extensive debugging messages"); 703