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/config.h> 68 #include <linux/kernel.h> 69 #include <linux/errno.h> 70 #include <linux/init.h> 71 #include <linux/slab.h> 72 #include <linux/tty.h> 73 #include <linux/tty_driver.h> 74 #include <linux/tty_flip.h> 75 #include <linux/module.h> 76 #include <linux/spinlock.h> 77 #include <asm/uaccess.h> 78 #include <linux/usb.h> 79 #include "usb-serial.h" 80 #include "mct_u232.h" 81 82 /* 83 * Version Information 84 */ 85 #define DRIVER_VERSION "z2.0" /* Linux in-kernel version */ 86 #define DRIVER_AUTHOR "Wolfgang Grandegger <wolfgang@ces.ch>" 87 #define DRIVER_DESC "Magic Control Technology USB-RS232 converter driver" 88 89 static int debug; 90 91 /* 92 * Function prototypes 93 */ 94 static int mct_u232_startup (struct usb_serial *serial); 95 static void mct_u232_shutdown (struct usb_serial *serial); 96 static int mct_u232_open (struct usb_serial_port *port, 97 struct file *filp); 98 static void mct_u232_close (struct usb_serial_port *port, 99 struct file *filp); 100 static void mct_u232_read_int_callback (struct urb *urb, struct pt_regs *regs); 101 static void mct_u232_set_termios (struct usb_serial_port *port, 102 struct termios * old); 103 static int mct_u232_ioctl (struct usb_serial_port *port, 104 struct file * file, 105 unsigned int cmd, 106 unsigned long arg); 107 static void mct_u232_break_ctl (struct usb_serial_port *port, 108 int break_state ); 109 static int mct_u232_tiocmget (struct usb_serial_port *port, 110 struct file *file); 111 static int mct_u232_tiocmset (struct usb_serial_port *port, 112 struct file *file, unsigned int set, 113 unsigned int clear); 114 /* 115 * All of the device info needed for the MCT USB-RS232 converter. 116 */ 117 static struct usb_device_id id_table_combined [] = { 118 { USB_DEVICE(MCT_U232_VID, MCT_U232_PID) }, 119 { USB_DEVICE(MCT_U232_VID, MCT_U232_SITECOM_PID) }, 120 { USB_DEVICE(MCT_U232_VID, MCT_U232_DU_H3SP_PID) }, 121 { USB_DEVICE(MCT_U232_BELKIN_F5U109_VID, MCT_U232_BELKIN_F5U109_PID) }, 122 { } /* Terminating entry */ 123 }; 124 125 MODULE_DEVICE_TABLE (usb, id_table_combined); 126 127 static struct usb_driver mct_u232_driver = { 128 .name = "mct_u232", 129 .probe = usb_serial_probe, 130 .disconnect = usb_serial_disconnect, 131 .id_table = id_table_combined, 132 .no_dynamic_id = 1, 133 }; 134 135 static struct usb_serial_driver mct_u232_device = { 136 .driver = { 137 .owner = THIS_MODULE, 138 .name = "mct_u232", 139 }, 140 .description = "MCT U232", 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 if (port->read_urb) { 363 /* No unlinking, it wasn't submitted yet. */ 364 usb_free_urb(port->read_urb); 365 } 366 port->read_urb = rport->interrupt_in_urb; 367 rport->interrupt_in_urb = NULL; 368 port->read_urb->context = port; 369 370 return (0); 371 } /* mct_u232_startup */ 372 373 374 static void mct_u232_shutdown (struct usb_serial *serial) 375 { 376 struct mct_u232_private *priv; 377 int i; 378 379 dbg("%s", __FUNCTION__); 380 381 for (i=0; i < serial->num_ports; ++i) { 382 /* My special items, the standard routines free my urbs */ 383 priv = usb_get_serial_port_data(serial->port[i]); 384 if (priv) { 385 usb_set_serial_port_data(serial->port[i], NULL); 386 kfree(priv); 387 } 388 } 389 } /* mct_u232_shutdown */ 390 391 static int mct_u232_open (struct usb_serial_port *port, struct file *filp) 392 { 393 struct usb_serial *serial = port->serial; 394 struct mct_u232_private *priv = usb_get_serial_port_data(port); 395 int retval = 0; 396 unsigned int control_state; 397 unsigned long flags; 398 unsigned char last_lcr; 399 unsigned char last_msr; 400 401 dbg("%s port %d", __FUNCTION__, port->number); 402 403 /* Compensate for a hardware bug: although the Sitecom U232-P25 404 * device reports a maximum output packet size of 32 bytes, 405 * it seems to be able to accept only 16 bytes (and that's what 406 * SniffUSB says too...) 407 */ 408 if (le16_to_cpu(serial->dev->descriptor.idProduct) == MCT_U232_SITECOM_PID) 409 port->bulk_out_size = 16; 410 411 /* Do a defined restart: the normal serial device seems to 412 * always turn on DTR and RTS here, so do the same. I'm not 413 * sure if this is really necessary. But it should not harm 414 * either. 415 */ 416 spin_lock_irqsave(&priv->lock, flags); 417 if (port->tty->termios->c_cflag & CBAUD) 418 priv->control_state = TIOCM_DTR | TIOCM_RTS; 419 else 420 priv->control_state = 0; 421 422 priv->last_lcr = (MCT_U232_DATA_BITS_8 | 423 MCT_U232_PARITY_NONE | 424 MCT_U232_STOP_BITS_1); 425 control_state = priv->control_state; 426 last_lcr = priv->last_lcr; 427 spin_unlock_irqrestore(&priv->lock, flags); 428 mct_u232_set_modem_ctrl(serial, control_state); 429 mct_u232_set_line_ctrl(serial, last_lcr); 430 431 /* Read modem status and update control state */ 432 mct_u232_get_modem_stat(serial, &last_msr); 433 spin_lock_irqsave(&priv->lock, flags); 434 priv->last_msr = last_msr; 435 mct_u232_msr_to_state(&priv->control_state, priv->last_msr); 436 spin_unlock_irqrestore(&priv->lock, flags); 437 438 port->read_urb->dev = port->serial->dev; 439 retval = usb_submit_urb(port->read_urb, GFP_KERNEL); 440 if (retval) { 441 err("usb_submit_urb(read bulk) failed pipe 0x%x err %d", 442 port->read_urb->pipe, retval); 443 goto exit; 444 } 445 446 port->interrupt_in_urb->dev = port->serial->dev; 447 retval = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL); 448 if (retval) 449 err(" usb_submit_urb(read int) failed pipe 0x%x err %d", 450 port->interrupt_in_urb->pipe, retval); 451 452 exit: 453 return 0; 454 } /* mct_u232_open */ 455 456 457 static void mct_u232_close (struct usb_serial_port *port, struct file *filp) 458 { 459 dbg("%s port %d", __FUNCTION__, port->number); 460 461 if (port->serial->dev) { 462 /* shutdown our urbs */ 463 usb_kill_urb(port->write_urb); 464 usb_kill_urb(port->read_urb); 465 usb_kill_urb(port->interrupt_in_urb); 466 } 467 } /* mct_u232_close */ 468 469 470 static void mct_u232_read_int_callback (struct urb *urb, struct pt_regs *regs) 471 { 472 struct usb_serial_port *port = (struct usb_serial_port *)urb->context; 473 struct mct_u232_private *priv = usb_get_serial_port_data(port); 474 struct usb_serial *serial = port->serial; 475 struct tty_struct *tty; 476 unsigned char *data = urb->transfer_buffer; 477 int status; 478 unsigned long flags; 479 480 switch (urb->status) { 481 case 0: 482 /* success */ 483 break; 484 case -ECONNRESET: 485 case -ENOENT: 486 case -ESHUTDOWN: 487 /* this urb is terminated, clean up */ 488 dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status); 489 return; 490 default: 491 dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status); 492 goto exit; 493 } 494 495 if (!serial) { 496 dbg("%s - bad serial pointer, exiting", __FUNCTION__); 497 return; 498 } 499 500 dbg("%s - port %d", __FUNCTION__, port->number); 501 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data); 502 503 /* 504 * Work-a-round: handle the 'usual' bulk-in pipe here 505 */ 506 if (urb->transfer_buffer_length > 2) { 507 int i; 508 tty = port->tty; 509 if (urb->actual_length) { 510 for (i = 0; i < urb->actual_length ; ++i) { 511 tty_insert_flip_char(tty, data[i], 0); 512 } 513 tty_flip_buffer_push(tty); 514 } 515 goto exit; 516 } 517 518 /* 519 * The interrupt-in pipe signals exceptional conditions (modem line 520 * signal changes and errors). data[0] holds MSR, data[1] holds LSR. 521 */ 522 spin_lock_irqsave(&priv->lock, flags); 523 priv->last_msr = data[MCT_U232_MSR_INDEX]; 524 525 /* Record Control Line states */ 526 mct_u232_msr_to_state(&priv->control_state, priv->last_msr); 527 528 #if 0 529 /* Not yet handled. See belin_sa.c for further information */ 530 /* Now to report any errors */ 531 priv->last_lsr = data[MCT_U232_LSR_INDEX]; 532 /* 533 * fill in the flip buffer here, but I do not know the relation 534 * to the current/next receive buffer or characters. I need 535 * to look in to this before committing any code. 536 */ 537 if (priv->last_lsr & MCT_U232_LSR_ERR) { 538 tty = port->tty; 539 /* Overrun Error */ 540 if (priv->last_lsr & MCT_U232_LSR_OE) { 541 } 542 /* Parity Error */ 543 if (priv->last_lsr & MCT_U232_LSR_PE) { 544 } 545 /* Framing Error */ 546 if (priv->last_lsr & MCT_U232_LSR_FE) { 547 } 548 /* Break Indicator */ 549 if (priv->last_lsr & MCT_U232_LSR_BI) { 550 } 551 } 552 #endif 553 spin_unlock_irqrestore(&priv->lock, flags); 554 exit: 555 status = usb_submit_urb (urb, GFP_ATOMIC); 556 if (status) 557 err ("%s - usb_submit_urb failed with result %d", 558 __FUNCTION__, status); 559 } /* mct_u232_read_int_callback */ 560 561 static void mct_u232_set_termios (struct usb_serial_port *port, 562 struct termios *old_termios) 563 { 564 struct usb_serial *serial = port->serial; 565 struct mct_u232_private *priv = usb_get_serial_port_data(port); 566 unsigned int iflag = port->tty->termios->c_iflag; 567 unsigned int cflag = port->tty->termios->c_cflag; 568 unsigned int old_cflag = old_termios->c_cflag; 569 unsigned long flags; 570 unsigned int control_state, new_state; 571 unsigned char last_lcr; 572 573 /* get a local copy of the current port settings */ 574 spin_lock_irqsave(&priv->lock, flags); 575 control_state = priv->control_state; 576 spin_unlock_irqrestore(&priv->lock, flags); 577 last_lcr = 0; 578 579 /* 580 * Update baud rate. 581 * Do not attempt to cache old rates and skip settings, 582 * disconnects screw such tricks up completely. 583 * Premature optimization is the root of all evil. 584 */ 585 586 /* reassert DTR and (maybe) RTS on transition from B0 */ 587 if ((old_cflag & CBAUD) == B0) { 588 dbg("%s: baud was B0", __FUNCTION__); 589 control_state |= TIOCM_DTR; 590 /* don't set RTS if using hardware flow control */ 591 if (!(old_cflag & CRTSCTS)) { 592 control_state |= TIOCM_RTS; 593 } 594 mct_u232_set_modem_ctrl(serial, control_state); 595 } 596 597 mct_u232_set_baud_rate(serial, cflag & CBAUD); 598 599 if ((cflag & CBAUD) == B0 ) { 600 dbg("%s: baud is B0", __FUNCTION__); 601 /* Drop RTS and DTR */ 602 control_state &= ~(TIOCM_DTR | TIOCM_RTS); 603 mct_u232_set_modem_ctrl(serial, control_state); 604 } 605 606 /* 607 * Update line control register (LCR) 608 */ 609 610 /* set the parity */ 611 if (cflag & PARENB) 612 last_lcr |= (cflag & PARODD) ? 613 MCT_U232_PARITY_ODD : MCT_U232_PARITY_EVEN; 614 else 615 last_lcr |= MCT_U232_PARITY_NONE; 616 617 /* set the number of data bits */ 618 switch (cflag & CSIZE) { 619 case CS5: 620 last_lcr |= MCT_U232_DATA_BITS_5; break; 621 case CS6: 622 last_lcr |= MCT_U232_DATA_BITS_6; break; 623 case CS7: 624 last_lcr |= MCT_U232_DATA_BITS_7; break; 625 case CS8: 626 last_lcr |= MCT_U232_DATA_BITS_8; break; 627 default: 628 err("CSIZE was not CS5-CS8, using default of 8"); 629 last_lcr |= MCT_U232_DATA_BITS_8; 630 break; 631 } 632 633 /* set the number of stop bits */ 634 last_lcr |= (cflag & CSTOPB) ? 635 MCT_U232_STOP_BITS_2 : MCT_U232_STOP_BITS_1; 636 637 mct_u232_set_line_ctrl(serial, last_lcr); 638 639 /* 640 * Set flow control: well, I do not really now how to handle DTR/RTS. 641 * Just do what we have seen with SniffUSB on Win98. 642 */ 643 /* Drop DTR/RTS if no flow control otherwise assert */ 644 new_state = control_state; 645 if ((iflag & IXOFF) || (iflag & IXON) || (cflag & CRTSCTS)) 646 new_state |= TIOCM_DTR | TIOCM_RTS; 647 else 648 new_state &= ~(TIOCM_DTR | TIOCM_RTS); 649 if (new_state != control_state) { 650 mct_u232_set_modem_ctrl(serial, new_state); 651 control_state = new_state; 652 } 653 654 /* save off the modified port settings */ 655 spin_lock_irqsave(&priv->lock, flags); 656 priv->control_state = control_state; 657 priv->last_lcr = last_lcr; 658 spin_unlock_irqrestore(&priv->lock, flags); 659 } /* mct_u232_set_termios */ 660 661 static void mct_u232_break_ctl( struct usb_serial_port *port, int break_state ) 662 { 663 struct usb_serial *serial = port->serial; 664 struct mct_u232_private *priv = usb_get_serial_port_data(port); 665 unsigned char lcr; 666 unsigned long flags; 667 668 dbg("%sstate=%d", __FUNCTION__, break_state); 669 670 spin_lock_irqsave(&priv->lock, flags); 671 lcr = priv->last_lcr; 672 spin_unlock_irqrestore(&priv->lock, flags); 673 674 if (break_state) 675 lcr |= MCT_U232_SET_BREAK; 676 677 mct_u232_set_line_ctrl(serial, lcr); 678 } /* mct_u232_break_ctl */ 679 680 681 static int mct_u232_tiocmget (struct usb_serial_port *port, struct file *file) 682 { 683 struct mct_u232_private *priv = usb_get_serial_port_data(port); 684 unsigned int control_state; 685 unsigned long flags; 686 687 dbg("%s", __FUNCTION__); 688 689 spin_lock_irqsave(&priv->lock, flags); 690 control_state = priv->control_state; 691 spin_unlock_irqrestore(&priv->lock, flags); 692 693 return control_state; 694 } 695 696 static int mct_u232_tiocmset (struct usb_serial_port *port, struct file *file, 697 unsigned int set, unsigned int clear) 698 { 699 struct usb_serial *serial = port->serial; 700 struct mct_u232_private *priv = usb_get_serial_port_data(port); 701 unsigned int control_state; 702 unsigned long flags; 703 704 dbg("%s", __FUNCTION__); 705 706 spin_lock_irqsave(&priv->lock, flags); 707 control_state = priv->control_state; 708 709 if (set & TIOCM_RTS) 710 control_state |= TIOCM_RTS; 711 if (set & TIOCM_DTR) 712 control_state |= TIOCM_DTR; 713 if (clear & TIOCM_RTS) 714 control_state &= ~TIOCM_RTS; 715 if (clear & TIOCM_DTR) 716 control_state &= ~TIOCM_DTR; 717 718 priv->control_state = control_state; 719 spin_unlock_irqrestore(&priv->lock, flags); 720 return mct_u232_set_modem_ctrl(serial, control_state); 721 } 722 723 static int mct_u232_ioctl (struct usb_serial_port *port, struct file * file, 724 unsigned int cmd, unsigned long arg) 725 { 726 dbg("%scmd=0x%x", __FUNCTION__, cmd); 727 728 /* Based on code from acm.c and others */ 729 switch (cmd) { 730 case TIOCMIWAIT: 731 /* wait for any of the 4 modem inputs (DCD,RI,DSR,CTS)*/ 732 /* TODO */ 733 return( 0 ); 734 735 case TIOCGICOUNT: 736 /* return count of modemline transitions */ 737 /* TODO */ 738 return 0; 739 740 default: 741 dbg("%s: arg not supported - 0x%04x", __FUNCTION__,cmd); 742 return(-ENOIOCTLCMD); 743 break; 744 } 745 return 0; 746 } /* mct_u232_ioctl */ 747 748 749 static int __init mct_u232_init (void) 750 { 751 int retval; 752 retval = usb_serial_register(&mct_u232_device); 753 if (retval) 754 goto failed_usb_serial_register; 755 retval = usb_register(&mct_u232_driver); 756 if (retval) 757 goto failed_usb_register; 758 info(DRIVER_DESC " " DRIVER_VERSION); 759 return 0; 760 failed_usb_register: 761 usb_serial_deregister(&mct_u232_device); 762 failed_usb_serial_register: 763 return retval; 764 } 765 766 767 static void __exit mct_u232_exit (void) 768 { 769 usb_deregister (&mct_u232_driver); 770 usb_serial_deregister (&mct_u232_device); 771 } 772 773 774 module_init (mct_u232_init); 775 module_exit(mct_u232_exit); 776 777 MODULE_AUTHOR( DRIVER_AUTHOR ); 778 MODULE_DESCRIPTION( DRIVER_DESC ); 779 MODULE_LICENSE("GPL"); 780 781 module_param(debug, bool, S_IRUGO | S_IWUSR); 782 MODULE_PARM_DESC(debug, "Debug enabled or not"); 783