1 /* 2 * MCT (Magic Control Technology Corp.) USB RS232 Converter Driver 3 * 4 * Copyright (C) 2000 Wolfgang Grandegger (wolfgang@ces.ch) 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 * 11 * This program is largely derived from the Belkin USB Serial Adapter Driver 12 * (see belkin_sa.[ch]). All of the information about the device was acquired 13 * by using SniffUSB on Windows98. For technical details see mct_u232.h. 14 * 15 * William G. Greathouse and Greg Kroah-Hartman provided great help on how to 16 * do the reverse engineering and how to write a USB serial device driver. 17 * 18 * TO BE DONE, TO BE CHECKED: 19 * DTR/RTS signal handling may be incomplete or incorrect. I have mainly 20 * implemented what I have seen with SniffUSB or found in belkin_sa.c. 21 * For further TODOs check also belkin_sa.c. 22 * 23 * TEST STATUS: 24 * Basic tests have been performed with minicom/zmodem transfers and 25 * modem dialing under Linux 2.4.0-test10 (for me it works fine). 26 * 27 * 04-Nov-2003 Bill Marr <marr at flex dot com> 28 * - Mimic Windows driver by sending 2 USB 'device request' messages 29 * following normal 'baud rate change' message. This allows data to be 30 * transmitted to RS-232 devices which don't assert the 'CTS' signal. 31 * 32 * 10-Nov-2001 Wolfgang Grandegger 33 * - Fixed an endianess problem with the baudrate selection for PowerPC. 34 * 35 * 06-Dec-2001 Martin Hamilton <martinh@gnu.org> 36 * Added support for the Belkin F5U109 DB9 adaptor 37 * 38 * 30-May-2001 Greg Kroah-Hartman 39 * switched from using spinlock to a semaphore, which fixes lots of problems. 40 * 41 * 04-May-2001 Stelian Pop 42 * - Set the maximum bulk output size for Sitecom U232-P25 model to 16 bytes 43 * instead of the device reported 32 (using 32 bytes causes many data 44 * loss, Windows driver uses 16 too). 45 * 46 * 02-May-2001 Stelian Pop 47 * - Fixed the baud calculation for Sitecom U232-P25 model 48 * 49 * 08-Apr-2001 gb 50 * - Identify version on module load. 51 * 52 * 06-Jan-2001 Cornel Ciocirlan 53 * - Added support for Sitecom U232-P25 model (Product Id 0x0230) 54 * - Added support for D-Link DU-H3SP USB BAY (Product Id 0x0200) 55 * 56 * 29-Nov-2000 Greg Kroah-Hartman 57 * - Added device id table to fit with 2.4.0-test11 structure. 58 * - took out DEAL_WITH_TWO_INT_IN_ENDPOINTS #define as it's not needed 59 * (lots of things will change if/when the usb-serial core changes to 60 * handle these issues. 61 * 62 * 27-Nov-2000 Wolfgang Grandegger 63 * A version for kernel 2.4.0-test10 released to the Linux community 64 * (via linux-usb-devel). 65 */ 66 67 #include <linux/kernel.h> 68 #include <linux/errno.h> 69 #include <linux/init.h> 70 #include <linux/slab.h> 71 #include <linux/tty.h> 72 #include <linux/tty_driver.h> 73 #include <linux/tty_flip.h> 74 #include <linux/module.h> 75 #include <linux/spinlock.h> 76 #include <asm/uaccess.h> 77 #include <linux/usb.h> 78 #include <linux/usb/serial.h> 79 #include "mct_u232.h" 80 81 /* 82 * Version Information 83 */ 84 #define DRIVER_VERSION "z2.0" /* Linux in-kernel version */ 85 #define DRIVER_AUTHOR "Wolfgang Grandegger <wolfgang@ces.ch>" 86 #define DRIVER_DESC "Magic Control Technology USB-RS232 converter driver" 87 88 static int debug; 89 90 /* 91 * Function prototypes 92 */ 93 static int mct_u232_startup (struct usb_serial *serial); 94 static void mct_u232_shutdown (struct usb_serial *serial); 95 static int mct_u232_open (struct usb_serial_port *port, 96 struct file *filp); 97 static void mct_u232_close (struct usb_serial_port *port, 98 struct file *filp); 99 static void mct_u232_read_int_callback (struct urb *urb); 100 static void mct_u232_set_termios (struct usb_serial_port *port, 101 struct ktermios * old); 102 static int mct_u232_ioctl (struct usb_serial_port *port, 103 struct file * file, 104 unsigned int cmd, 105 unsigned long arg); 106 static void mct_u232_break_ctl (struct usb_serial_port *port, 107 int break_state ); 108 static int mct_u232_tiocmget (struct usb_serial_port *port, 109 struct file *file); 110 static int mct_u232_tiocmset (struct usb_serial_port *port, 111 struct file *file, unsigned int set, 112 unsigned int clear); 113 /* 114 * All of the device info needed for the MCT USB-RS232 converter. 115 */ 116 static struct usb_device_id id_table_combined [] = { 117 { USB_DEVICE(MCT_U232_VID, MCT_U232_PID) }, 118 { USB_DEVICE(MCT_U232_VID, MCT_U232_SITECOM_PID) }, 119 { USB_DEVICE(MCT_U232_VID, MCT_U232_DU_H3SP_PID) }, 120 { USB_DEVICE(MCT_U232_BELKIN_F5U109_VID, MCT_U232_BELKIN_F5U109_PID) }, 121 { } /* Terminating entry */ 122 }; 123 124 MODULE_DEVICE_TABLE (usb, id_table_combined); 125 126 static struct usb_driver mct_u232_driver = { 127 .name = "mct_u232", 128 .probe = usb_serial_probe, 129 .disconnect = usb_serial_disconnect, 130 .id_table = id_table_combined, 131 .no_dynamic_id = 1, 132 }; 133 134 static struct usb_serial_driver mct_u232_device = { 135 .driver = { 136 .owner = THIS_MODULE, 137 .name = "mct_u232", 138 }, 139 .description = "MCT U232", 140 .usb_driver = &mct_u232_driver, 141 .id_table = id_table_combined, 142 .num_interrupt_in = 2, 143 .num_bulk_in = 0, 144 .num_bulk_out = 1, 145 .num_ports = 1, 146 .open = mct_u232_open, 147 .close = mct_u232_close, 148 .read_int_callback = mct_u232_read_int_callback, 149 .ioctl = mct_u232_ioctl, 150 .set_termios = mct_u232_set_termios, 151 .break_ctl = mct_u232_break_ctl, 152 .tiocmget = mct_u232_tiocmget, 153 .tiocmset = mct_u232_tiocmset, 154 .attach = mct_u232_startup, 155 .shutdown = mct_u232_shutdown, 156 }; 157 158 159 struct mct_u232_private { 160 spinlock_t lock; 161 unsigned int control_state; /* Modem Line Setting (TIOCM) */ 162 unsigned char last_lcr; /* Line Control Register */ 163 unsigned char last_lsr; /* Line Status Register */ 164 unsigned char last_msr; /* Modem Status Register */ 165 }; 166 167 /* 168 * Handle vendor specific USB requests 169 */ 170 171 #define WDR_TIMEOUT 5000 /* default urb timeout */ 172 173 /* 174 * Later day 2.6.0-test kernels have new baud rates like B230400 which 175 * we do not know how to support. We ignore them for the moment. 176 * XXX Rate-limit the error message, it's user triggerable. 177 */ 178 static int mct_u232_calculate_baud_rate(struct usb_serial *serial, int value) 179 { 180 if (le16_to_cpu(serial->dev->descriptor.idProduct) == MCT_U232_SITECOM_PID 181 || le16_to_cpu(serial->dev->descriptor.idProduct) == MCT_U232_BELKIN_F5U109_PID) { 182 switch (value) { 183 case B300: return 0x01; 184 case B600: return 0x02; /* this one not tested */ 185 case B1200: return 0x03; 186 case B2400: return 0x04; 187 case B4800: return 0x06; 188 case B9600: return 0x08; 189 case B19200: return 0x09; 190 case B38400: return 0x0a; 191 case B57600: return 0x0b; 192 case B115200: return 0x0c; 193 default: 194 err("MCT USB-RS232: unsupported baudrate request 0x%x," 195 " using default of B9600", value); 196 return 0x08; 197 } 198 } else { 199 switch (value) { 200 case B300: value = 300; break; 201 case B600: value = 600; break; 202 case B1200: value = 1200; break; 203 case B2400: value = 2400; break; 204 case B4800: value = 4800; break; 205 case B9600: value = 9600; break; 206 case B19200: value = 19200; break; 207 case B38400: value = 38400; break; 208 case B57600: value = 57600; break; 209 case B115200: value = 115200; break; 210 default: 211 err("MCT USB-RS232: unsupported baudrate request 0x%x," 212 " using default of B9600", value); 213 value = 9600; 214 } 215 return 115200/value; 216 } 217 } 218 219 static int mct_u232_set_baud_rate(struct usb_serial *serial, int value) 220 { 221 __le32 divisor; 222 int rc; 223 unsigned char zero_byte = 0; 224 225 divisor = cpu_to_le32(mct_u232_calculate_baud_rate(serial, value)); 226 227 rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 228 MCT_U232_SET_BAUD_RATE_REQUEST, 229 MCT_U232_SET_REQUEST_TYPE, 230 0, 0, &divisor, MCT_U232_SET_BAUD_RATE_SIZE, 231 WDR_TIMEOUT); 232 if (rc < 0) 233 err("Set BAUD RATE %d failed (error = %d)", value, rc); 234 dbg("set_baud_rate: value: 0x%x, divisor: 0x%x", value, divisor); 235 236 /* Mimic the MCT-supplied Windows driver (version 1.21P.0104), which 237 always sends two extra USB 'device request' messages after the 238 'baud rate change' message. The actual functionality of the 239 request codes in these messages is not fully understood but these 240 particular codes are never seen in any operation besides a baud 241 rate change. Both of these messages send a single byte of data 242 whose value is always zero. The second of these two extra messages 243 is required in order for data to be properly written to an RS-232 244 device which does not assert the 'CTS' signal. */ 245 246 rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 247 MCT_U232_SET_UNKNOWN1_REQUEST, 248 MCT_U232_SET_REQUEST_TYPE, 249 0, 0, &zero_byte, MCT_U232_SET_UNKNOWN1_SIZE, 250 WDR_TIMEOUT); 251 if (rc < 0) 252 err("Sending USB device request code %d failed (error = %d)", 253 MCT_U232_SET_UNKNOWN1_REQUEST, rc); 254 255 rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 256 MCT_U232_SET_UNKNOWN2_REQUEST, 257 MCT_U232_SET_REQUEST_TYPE, 258 0, 0, &zero_byte, MCT_U232_SET_UNKNOWN2_SIZE, 259 WDR_TIMEOUT); 260 if (rc < 0) 261 err("Sending USB device request code %d failed (error = %d)", 262 MCT_U232_SET_UNKNOWN2_REQUEST, rc); 263 264 return rc; 265 } /* mct_u232_set_baud_rate */ 266 267 static int mct_u232_set_line_ctrl(struct usb_serial *serial, unsigned char lcr) 268 { 269 int rc; 270 rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 271 MCT_U232_SET_LINE_CTRL_REQUEST, 272 MCT_U232_SET_REQUEST_TYPE, 273 0, 0, &lcr, MCT_U232_SET_LINE_CTRL_SIZE, 274 WDR_TIMEOUT); 275 if (rc < 0) 276 err("Set LINE CTRL 0x%x failed (error = %d)", lcr, rc); 277 dbg("set_line_ctrl: 0x%x", lcr); 278 return rc; 279 } /* mct_u232_set_line_ctrl */ 280 281 static int mct_u232_set_modem_ctrl(struct usb_serial *serial, 282 unsigned int control_state) 283 { 284 int rc; 285 unsigned char mcr = MCT_U232_MCR_NONE; 286 287 if (control_state & TIOCM_DTR) 288 mcr |= MCT_U232_MCR_DTR; 289 if (control_state & TIOCM_RTS) 290 mcr |= MCT_U232_MCR_RTS; 291 292 rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0), 293 MCT_U232_SET_MODEM_CTRL_REQUEST, 294 MCT_U232_SET_REQUEST_TYPE, 295 0, 0, &mcr, MCT_U232_SET_MODEM_CTRL_SIZE, 296 WDR_TIMEOUT); 297 if (rc < 0) 298 err("Set MODEM CTRL 0x%x failed (error = %d)", mcr, rc); 299 dbg("set_modem_ctrl: state=0x%x ==> mcr=0x%x", control_state, mcr); 300 301 return rc; 302 } /* mct_u232_set_modem_ctrl */ 303 304 static int mct_u232_get_modem_stat(struct usb_serial *serial, unsigned char *msr) 305 { 306 int rc; 307 rc = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0), 308 MCT_U232_GET_MODEM_STAT_REQUEST, 309 MCT_U232_GET_REQUEST_TYPE, 310 0, 0, msr, MCT_U232_GET_MODEM_STAT_SIZE, 311 WDR_TIMEOUT); 312 if (rc < 0) { 313 err("Get MODEM STATus failed (error = %d)", rc); 314 *msr = 0; 315 } 316 dbg("get_modem_stat: 0x%x", *msr); 317 return rc; 318 } /* mct_u232_get_modem_stat */ 319 320 static void mct_u232_msr_to_state(unsigned int *control_state, unsigned char msr) 321 { 322 /* Translate Control Line states */ 323 if (msr & MCT_U232_MSR_DSR) 324 *control_state |= TIOCM_DSR; 325 else 326 *control_state &= ~TIOCM_DSR; 327 if (msr & MCT_U232_MSR_CTS) 328 *control_state |= TIOCM_CTS; 329 else 330 *control_state &= ~TIOCM_CTS; 331 if (msr & MCT_U232_MSR_RI) 332 *control_state |= TIOCM_RI; 333 else 334 *control_state &= ~TIOCM_RI; 335 if (msr & MCT_U232_MSR_CD) 336 *control_state |= TIOCM_CD; 337 else 338 *control_state &= ~TIOCM_CD; 339 dbg("msr_to_state: msr=0x%x ==> state=0x%x", msr, *control_state); 340 } /* mct_u232_msr_to_state */ 341 342 /* 343 * Driver's tty interface functions 344 */ 345 346 static int mct_u232_startup (struct usb_serial *serial) 347 { 348 struct mct_u232_private *priv; 349 struct usb_serial_port *port, *rport; 350 351 priv = kzalloc(sizeof(struct mct_u232_private), GFP_KERNEL); 352 if (!priv) 353 return -ENOMEM; 354 spin_lock_init(&priv->lock); 355 usb_set_serial_port_data(serial->port[0], priv); 356 357 init_waitqueue_head(&serial->port[0]->write_wait); 358 359 /* Puh, that's dirty */ 360 port = serial->port[0]; 361 rport = serial->port[1]; 362 /* No unlinking, it wasn't submitted yet. */ 363 usb_free_urb(port->read_urb); 364 port->read_urb = rport->interrupt_in_urb; 365 rport->interrupt_in_urb = NULL; 366 port->read_urb->context = port; 367 368 return (0); 369 } /* mct_u232_startup */ 370 371 372 static void mct_u232_shutdown (struct usb_serial *serial) 373 { 374 struct mct_u232_private *priv; 375 int i; 376 377 dbg("%s", __FUNCTION__); 378 379 for (i=0; i < serial->num_ports; ++i) { 380 /* My special items, the standard routines free my urbs */ 381 priv = usb_get_serial_port_data(serial->port[i]); 382 if (priv) { 383 usb_set_serial_port_data(serial->port[i], NULL); 384 kfree(priv); 385 } 386 } 387 } /* mct_u232_shutdown */ 388 389 static int mct_u232_open (struct usb_serial_port *port, struct file *filp) 390 { 391 struct usb_serial *serial = port->serial; 392 struct mct_u232_private *priv = usb_get_serial_port_data(port); 393 int retval = 0; 394 unsigned int control_state; 395 unsigned long flags; 396 unsigned char last_lcr; 397 unsigned char last_msr; 398 399 dbg("%s port %d", __FUNCTION__, port->number); 400 401 /* Compensate for a hardware bug: although the Sitecom U232-P25 402 * device reports a maximum output packet size of 32 bytes, 403 * it seems to be able to accept only 16 bytes (and that's what 404 * SniffUSB says too...) 405 */ 406 if (le16_to_cpu(serial->dev->descriptor.idProduct) == MCT_U232_SITECOM_PID) 407 port->bulk_out_size = 16; 408 409 /* Do a defined restart: the normal serial device seems to 410 * always turn on DTR and RTS here, so do the same. I'm not 411 * sure if this is really necessary. But it should not harm 412 * either. 413 */ 414 spin_lock_irqsave(&priv->lock, flags); 415 if (port->tty->termios->c_cflag & CBAUD) 416 priv->control_state = TIOCM_DTR | TIOCM_RTS; 417 else 418 priv->control_state = 0; 419 420 priv->last_lcr = (MCT_U232_DATA_BITS_8 | 421 MCT_U232_PARITY_NONE | 422 MCT_U232_STOP_BITS_1); 423 control_state = priv->control_state; 424 last_lcr = priv->last_lcr; 425 spin_unlock_irqrestore(&priv->lock, flags); 426 mct_u232_set_modem_ctrl(serial, control_state); 427 mct_u232_set_line_ctrl(serial, last_lcr); 428 429 /* Read modem status and update control state */ 430 mct_u232_get_modem_stat(serial, &last_msr); 431 spin_lock_irqsave(&priv->lock, flags); 432 priv->last_msr = last_msr; 433 mct_u232_msr_to_state(&priv->control_state, priv->last_msr); 434 spin_unlock_irqrestore(&priv->lock, flags); 435 436 port->read_urb->dev = port->serial->dev; 437 retval = usb_submit_urb(port->read_urb, GFP_KERNEL); 438 if (retval) { 439 err("usb_submit_urb(read bulk) failed pipe 0x%x err %d", 440 port->read_urb->pipe, retval); 441 goto error; 442 } 443 444 port->interrupt_in_urb->dev = port->serial->dev; 445 retval = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); 446 if (retval) { 447 usb_kill_urb(port->read_urb); 448 err(" usb_submit_urb(read int) failed pipe 0x%x err %d", 449 port->interrupt_in_urb->pipe, retval); 450 goto error; 451 } 452 return 0; 453 454 error: 455 return retval; 456 } /* mct_u232_open */ 457 458 459 static void mct_u232_close (struct usb_serial_port *port, struct file *filp) 460 { 461 dbg("%s port %d", __FUNCTION__, port->number); 462 463 if (port->serial->dev) { 464 /* shutdown our urbs */ 465 usb_kill_urb(port->write_urb); 466 usb_kill_urb(port->read_urb); 467 usb_kill_urb(port->interrupt_in_urb); 468 } 469 } /* mct_u232_close */ 470 471 472 static void mct_u232_read_int_callback (struct urb *urb) 473 { 474 struct usb_serial_port *port = (struct usb_serial_port *)urb->context; 475 struct mct_u232_private *priv = usb_get_serial_port_data(port); 476 struct usb_serial *serial = port->serial; 477 struct tty_struct *tty; 478 unsigned char *data = urb->transfer_buffer; 479 int status; 480 unsigned long flags; 481 482 switch (urb->status) { 483 case 0: 484 /* success */ 485 break; 486 case -ECONNRESET: 487 case -ENOENT: 488 case -ESHUTDOWN: 489 /* this urb is terminated, clean up */ 490 dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status); 491 return; 492 default: 493 dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status); 494 goto exit; 495 } 496 497 if (!serial) { 498 dbg("%s - bad serial pointer, exiting", __FUNCTION__); 499 return; 500 } 501 502 dbg("%s - port %d", __FUNCTION__, port->number); 503 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data); 504 505 /* 506 * Work-a-round: handle the 'usual' bulk-in pipe here 507 */ 508 if (urb->transfer_buffer_length > 2) { 509 int i; 510 tty = port->tty; 511 if (urb->actual_length) { 512 for (i = 0; i < urb->actual_length ; ++i) { 513 tty_insert_flip_char(tty, data[i], 0); 514 } 515 tty_flip_buffer_push(tty); 516 } 517 goto exit; 518 } 519 520 /* 521 * The interrupt-in pipe signals exceptional conditions (modem line 522 * signal changes and errors). data[0] holds MSR, data[1] holds LSR. 523 */ 524 spin_lock_irqsave(&priv->lock, flags); 525 priv->last_msr = data[MCT_U232_MSR_INDEX]; 526 527 /* Record Control Line states */ 528 mct_u232_msr_to_state(&priv->control_state, priv->last_msr); 529 530 #if 0 531 /* Not yet handled. See belin_sa.c for further information */ 532 /* Now to report any errors */ 533 priv->last_lsr = data[MCT_U232_LSR_INDEX]; 534 /* 535 * fill in the flip buffer here, but I do not know the relation 536 * to the current/next receive buffer or characters. I need 537 * to look in to this before committing any code. 538 */ 539 if (priv->last_lsr & MCT_U232_LSR_ERR) { 540 tty = port->tty; 541 /* Overrun Error */ 542 if (priv->last_lsr & MCT_U232_LSR_OE) { 543 } 544 /* Parity Error */ 545 if (priv->last_lsr & MCT_U232_LSR_PE) { 546 } 547 /* Framing Error */ 548 if (priv->last_lsr & MCT_U232_LSR_FE) { 549 } 550 /* Break Indicator */ 551 if (priv->last_lsr & MCT_U232_LSR_BI) { 552 } 553 } 554 #endif 555 spin_unlock_irqrestore(&priv->lock, flags); 556 exit: 557 status = usb_submit_urb (urb, GFP_ATOMIC); 558 if (status) 559 err ("%s - usb_submit_urb failed with result %d", 560 __FUNCTION__, status); 561 } /* mct_u232_read_int_callback */ 562 563 static void mct_u232_set_termios (struct usb_serial_port *port, 564 struct ktermios *old_termios) 565 { 566 struct usb_serial *serial = port->serial; 567 struct mct_u232_private *priv = usb_get_serial_port_data(port); 568 unsigned int iflag = port->tty->termios->c_iflag; 569 unsigned int cflag = port->tty->termios->c_cflag; 570 unsigned int old_cflag = old_termios->c_cflag; 571 unsigned long flags; 572 unsigned int control_state, new_state; 573 unsigned char last_lcr; 574 575 /* get a local copy of the current port settings */ 576 spin_lock_irqsave(&priv->lock, flags); 577 control_state = priv->control_state; 578 spin_unlock_irqrestore(&priv->lock, flags); 579 last_lcr = 0; 580 581 /* 582 * Update baud rate. 583 * Do not attempt to cache old rates and skip settings, 584 * disconnects screw such tricks up completely. 585 * Premature optimization is the root of all evil. 586 */ 587 588 /* reassert DTR and (maybe) RTS on transition from B0 */ 589 if ((old_cflag & CBAUD) == B0) { 590 dbg("%s: baud was B0", __FUNCTION__); 591 control_state |= TIOCM_DTR; 592 /* don't set RTS if using hardware flow control */ 593 if (!(old_cflag & CRTSCTS)) { 594 control_state |= TIOCM_RTS; 595 } 596 mct_u232_set_modem_ctrl(serial, control_state); 597 } 598 599 mct_u232_set_baud_rate(serial, cflag & CBAUD); 600 601 if ((cflag & CBAUD) == B0 ) { 602 dbg("%s: baud is B0", __FUNCTION__); 603 /* Drop RTS and DTR */ 604 control_state &= ~(TIOCM_DTR | TIOCM_RTS); 605 mct_u232_set_modem_ctrl(serial, control_state); 606 } 607 608 /* 609 * Update line control register (LCR) 610 */ 611 612 /* set the parity */ 613 if (cflag & PARENB) 614 last_lcr |= (cflag & PARODD) ? 615 MCT_U232_PARITY_ODD : MCT_U232_PARITY_EVEN; 616 else 617 last_lcr |= MCT_U232_PARITY_NONE; 618 619 /* set the number of data bits */ 620 switch (cflag & CSIZE) { 621 case CS5: 622 last_lcr |= MCT_U232_DATA_BITS_5; break; 623 case CS6: 624 last_lcr |= MCT_U232_DATA_BITS_6; break; 625 case CS7: 626 last_lcr |= MCT_U232_DATA_BITS_7; break; 627 case CS8: 628 last_lcr |= MCT_U232_DATA_BITS_8; break; 629 default: 630 err("CSIZE was not CS5-CS8, using default of 8"); 631 last_lcr |= MCT_U232_DATA_BITS_8; 632 break; 633 } 634 635 /* set the number of stop bits */ 636 last_lcr |= (cflag & CSTOPB) ? 637 MCT_U232_STOP_BITS_2 : MCT_U232_STOP_BITS_1; 638 639 mct_u232_set_line_ctrl(serial, last_lcr); 640 641 /* 642 * Set flow control: well, I do not really now how to handle DTR/RTS. 643 * Just do what we have seen with SniffUSB on Win98. 644 */ 645 /* Drop DTR/RTS if no flow control otherwise assert */ 646 new_state = control_state; 647 if ((iflag & IXOFF) || (iflag & IXON) || (cflag & CRTSCTS)) 648 new_state |= TIOCM_DTR | TIOCM_RTS; 649 else 650 new_state &= ~(TIOCM_DTR | TIOCM_RTS); 651 if (new_state != control_state) { 652 mct_u232_set_modem_ctrl(serial, new_state); 653 control_state = new_state; 654 } 655 656 /* save off the modified port settings */ 657 spin_lock_irqsave(&priv->lock, flags); 658 priv->control_state = control_state; 659 priv->last_lcr = last_lcr; 660 spin_unlock_irqrestore(&priv->lock, flags); 661 } /* mct_u232_set_termios */ 662 663 static void mct_u232_break_ctl( struct usb_serial_port *port, int break_state ) 664 { 665 struct usb_serial *serial = port->serial; 666 struct mct_u232_private *priv = usb_get_serial_port_data(port); 667 unsigned char lcr; 668 unsigned long flags; 669 670 dbg("%sstate=%d", __FUNCTION__, break_state); 671 672 spin_lock_irqsave(&priv->lock, flags); 673 lcr = priv->last_lcr; 674 spin_unlock_irqrestore(&priv->lock, flags); 675 676 if (break_state) 677 lcr |= MCT_U232_SET_BREAK; 678 679 mct_u232_set_line_ctrl(serial, lcr); 680 } /* mct_u232_break_ctl */ 681 682 683 static int mct_u232_tiocmget (struct usb_serial_port *port, struct file *file) 684 { 685 struct mct_u232_private *priv = usb_get_serial_port_data(port); 686 unsigned int control_state; 687 unsigned long flags; 688 689 dbg("%s", __FUNCTION__); 690 691 spin_lock_irqsave(&priv->lock, flags); 692 control_state = priv->control_state; 693 spin_unlock_irqrestore(&priv->lock, flags); 694 695 return control_state; 696 } 697 698 static int mct_u232_tiocmset (struct usb_serial_port *port, struct file *file, 699 unsigned int set, unsigned int clear) 700 { 701 struct usb_serial *serial = port->serial; 702 struct mct_u232_private *priv = usb_get_serial_port_data(port); 703 unsigned int control_state; 704 unsigned long flags; 705 706 dbg("%s", __FUNCTION__); 707 708 spin_lock_irqsave(&priv->lock, flags); 709 control_state = priv->control_state; 710 711 if (set & TIOCM_RTS) 712 control_state |= TIOCM_RTS; 713 if (set & TIOCM_DTR) 714 control_state |= TIOCM_DTR; 715 if (clear & TIOCM_RTS) 716 control_state &= ~TIOCM_RTS; 717 if (clear & TIOCM_DTR) 718 control_state &= ~TIOCM_DTR; 719 720 priv->control_state = control_state; 721 spin_unlock_irqrestore(&priv->lock, flags); 722 return mct_u232_set_modem_ctrl(serial, control_state); 723 } 724 725 static int mct_u232_ioctl (struct usb_serial_port *port, struct file * file, 726 unsigned int cmd, unsigned long arg) 727 { 728 dbg("%scmd=0x%x", __FUNCTION__, cmd); 729 730 /* Based on code from acm.c and others */ 731 switch (cmd) { 732 case TIOCMIWAIT: 733 /* wait for any of the 4 modem inputs (DCD,RI,DSR,CTS)*/ 734 /* TODO */ 735 return( 0 ); 736 737 case TIOCGICOUNT: 738 /* return count of modemline transitions */ 739 /* TODO */ 740 return 0; 741 742 default: 743 dbg("%s: arg not supported - 0x%04x", __FUNCTION__,cmd); 744 return(-ENOIOCTLCMD); 745 break; 746 } 747 return 0; 748 } /* mct_u232_ioctl */ 749 750 751 static int __init mct_u232_init (void) 752 { 753 int retval; 754 retval = usb_serial_register(&mct_u232_device); 755 if (retval) 756 goto failed_usb_serial_register; 757 retval = usb_register(&mct_u232_driver); 758 if (retval) 759 goto failed_usb_register; 760 info(DRIVER_DESC " " DRIVER_VERSION); 761 return 0; 762 failed_usb_register: 763 usb_serial_deregister(&mct_u232_device); 764 failed_usb_serial_register: 765 return retval; 766 } 767 768 769 static void __exit mct_u232_exit (void) 770 { 771 usb_deregister (&mct_u232_driver); 772 usb_serial_deregister (&mct_u232_device); 773 } 774 775 776 module_init (mct_u232_init); 777 module_exit(mct_u232_exit); 778 779 MODULE_AUTHOR( DRIVER_AUTHOR ); 780 MODULE_DESCRIPTION( DRIVER_DESC ); 781 MODULE_LICENSE("GPL"); 782 783 module_param(debug, bool, S_IRUGO | S_IWUSR); 784 MODULE_PARM_DESC(debug, "Debug enabled or not"); 785