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 exit; 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 err(" usb_submit_urb(read int) failed pipe 0x%x err %d", 448 port->interrupt_in_urb->pipe, retval); 449 450 exit: 451 return 0; 452 } /* mct_u232_open */ 453 454 455 static void mct_u232_close (struct usb_serial_port *port, struct file *filp) 456 { 457 dbg("%s port %d", __FUNCTION__, port->number); 458 459 if (port->serial->dev) { 460 /* shutdown our urbs */ 461 usb_kill_urb(port->write_urb); 462 usb_kill_urb(port->read_urb); 463 usb_kill_urb(port->interrupt_in_urb); 464 } 465 } /* mct_u232_close */ 466 467 468 static void mct_u232_read_int_callback (struct urb *urb) 469 { 470 struct usb_serial_port *port = (struct usb_serial_port *)urb->context; 471 struct mct_u232_private *priv = usb_get_serial_port_data(port); 472 struct usb_serial *serial = port->serial; 473 struct tty_struct *tty; 474 unsigned char *data = urb->transfer_buffer; 475 int status; 476 unsigned long flags; 477 478 switch (urb->status) { 479 case 0: 480 /* success */ 481 break; 482 case -ECONNRESET: 483 case -ENOENT: 484 case -ESHUTDOWN: 485 /* this urb is terminated, clean up */ 486 dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status); 487 return; 488 default: 489 dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status); 490 goto exit; 491 } 492 493 if (!serial) { 494 dbg("%s - bad serial pointer, exiting", __FUNCTION__); 495 return; 496 } 497 498 dbg("%s - port %d", __FUNCTION__, port->number); 499 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, urb->actual_length, data); 500 501 /* 502 * Work-a-round: handle the 'usual' bulk-in pipe here 503 */ 504 if (urb->transfer_buffer_length > 2) { 505 int i; 506 tty = port->tty; 507 if (urb->actual_length) { 508 for (i = 0; i < urb->actual_length ; ++i) { 509 tty_insert_flip_char(tty, data[i], 0); 510 } 511 tty_flip_buffer_push(tty); 512 } 513 goto exit; 514 } 515 516 /* 517 * The interrupt-in pipe signals exceptional conditions (modem line 518 * signal changes and errors). data[0] holds MSR, data[1] holds LSR. 519 */ 520 spin_lock_irqsave(&priv->lock, flags); 521 priv->last_msr = data[MCT_U232_MSR_INDEX]; 522 523 /* Record Control Line states */ 524 mct_u232_msr_to_state(&priv->control_state, priv->last_msr); 525 526 #if 0 527 /* Not yet handled. See belin_sa.c for further information */ 528 /* Now to report any errors */ 529 priv->last_lsr = data[MCT_U232_LSR_INDEX]; 530 /* 531 * fill in the flip buffer here, but I do not know the relation 532 * to the current/next receive buffer or characters. I need 533 * to look in to this before committing any code. 534 */ 535 if (priv->last_lsr & MCT_U232_LSR_ERR) { 536 tty = port->tty; 537 /* Overrun Error */ 538 if (priv->last_lsr & MCT_U232_LSR_OE) { 539 } 540 /* Parity Error */ 541 if (priv->last_lsr & MCT_U232_LSR_PE) { 542 } 543 /* Framing Error */ 544 if (priv->last_lsr & MCT_U232_LSR_FE) { 545 } 546 /* Break Indicator */ 547 if (priv->last_lsr & MCT_U232_LSR_BI) { 548 } 549 } 550 #endif 551 spin_unlock_irqrestore(&priv->lock, flags); 552 exit: 553 status = usb_submit_urb (urb, GFP_ATOMIC); 554 if (status) 555 err ("%s - usb_submit_urb failed with result %d", 556 __FUNCTION__, status); 557 } /* mct_u232_read_int_callback */ 558 559 static void mct_u232_set_termios (struct usb_serial_port *port, 560 struct ktermios *old_termios) 561 { 562 struct usb_serial *serial = port->serial; 563 struct mct_u232_private *priv = usb_get_serial_port_data(port); 564 unsigned int iflag = port->tty->termios->c_iflag; 565 unsigned int cflag = port->tty->termios->c_cflag; 566 unsigned int old_cflag = old_termios->c_cflag; 567 unsigned long flags; 568 unsigned int control_state, new_state; 569 unsigned char last_lcr; 570 571 /* get a local copy of the current port settings */ 572 spin_lock_irqsave(&priv->lock, flags); 573 control_state = priv->control_state; 574 spin_unlock_irqrestore(&priv->lock, flags); 575 last_lcr = 0; 576 577 /* 578 * Update baud rate. 579 * Do not attempt to cache old rates and skip settings, 580 * disconnects screw such tricks up completely. 581 * Premature optimization is the root of all evil. 582 */ 583 584 /* reassert DTR and (maybe) RTS on transition from B0 */ 585 if ((old_cflag & CBAUD) == B0) { 586 dbg("%s: baud was B0", __FUNCTION__); 587 control_state |= TIOCM_DTR; 588 /* don't set RTS if using hardware flow control */ 589 if (!(old_cflag & CRTSCTS)) { 590 control_state |= TIOCM_RTS; 591 } 592 mct_u232_set_modem_ctrl(serial, control_state); 593 } 594 595 mct_u232_set_baud_rate(serial, cflag & CBAUD); 596 597 if ((cflag & CBAUD) == B0 ) { 598 dbg("%s: baud is B0", __FUNCTION__); 599 /* Drop RTS and DTR */ 600 control_state &= ~(TIOCM_DTR | TIOCM_RTS); 601 mct_u232_set_modem_ctrl(serial, control_state); 602 } 603 604 /* 605 * Update line control register (LCR) 606 */ 607 608 /* set the parity */ 609 if (cflag & PARENB) 610 last_lcr |= (cflag & PARODD) ? 611 MCT_U232_PARITY_ODD : MCT_U232_PARITY_EVEN; 612 else 613 last_lcr |= MCT_U232_PARITY_NONE; 614 615 /* set the number of data bits */ 616 switch (cflag & CSIZE) { 617 case CS5: 618 last_lcr |= MCT_U232_DATA_BITS_5; break; 619 case CS6: 620 last_lcr |= MCT_U232_DATA_BITS_6; break; 621 case CS7: 622 last_lcr |= MCT_U232_DATA_BITS_7; break; 623 case CS8: 624 last_lcr |= MCT_U232_DATA_BITS_8; break; 625 default: 626 err("CSIZE was not CS5-CS8, using default of 8"); 627 last_lcr |= MCT_U232_DATA_BITS_8; 628 break; 629 } 630 631 /* set the number of stop bits */ 632 last_lcr |= (cflag & CSTOPB) ? 633 MCT_U232_STOP_BITS_2 : MCT_U232_STOP_BITS_1; 634 635 mct_u232_set_line_ctrl(serial, last_lcr); 636 637 /* 638 * Set flow control: well, I do not really now how to handle DTR/RTS. 639 * Just do what we have seen with SniffUSB on Win98. 640 */ 641 /* Drop DTR/RTS if no flow control otherwise assert */ 642 new_state = control_state; 643 if ((iflag & IXOFF) || (iflag & IXON) || (cflag & CRTSCTS)) 644 new_state |= TIOCM_DTR | TIOCM_RTS; 645 else 646 new_state &= ~(TIOCM_DTR | TIOCM_RTS); 647 if (new_state != control_state) { 648 mct_u232_set_modem_ctrl(serial, new_state); 649 control_state = new_state; 650 } 651 652 /* save off the modified port settings */ 653 spin_lock_irqsave(&priv->lock, flags); 654 priv->control_state = control_state; 655 priv->last_lcr = last_lcr; 656 spin_unlock_irqrestore(&priv->lock, flags); 657 } /* mct_u232_set_termios */ 658 659 static void mct_u232_break_ctl( struct usb_serial_port *port, int break_state ) 660 { 661 struct usb_serial *serial = port->serial; 662 struct mct_u232_private *priv = usb_get_serial_port_data(port); 663 unsigned char lcr; 664 unsigned long flags; 665 666 dbg("%sstate=%d", __FUNCTION__, break_state); 667 668 spin_lock_irqsave(&priv->lock, flags); 669 lcr = priv->last_lcr; 670 spin_unlock_irqrestore(&priv->lock, flags); 671 672 if (break_state) 673 lcr |= MCT_U232_SET_BREAK; 674 675 mct_u232_set_line_ctrl(serial, lcr); 676 } /* mct_u232_break_ctl */ 677 678 679 static int mct_u232_tiocmget (struct usb_serial_port *port, struct file *file) 680 { 681 struct mct_u232_private *priv = usb_get_serial_port_data(port); 682 unsigned int control_state; 683 unsigned long flags; 684 685 dbg("%s", __FUNCTION__); 686 687 spin_lock_irqsave(&priv->lock, flags); 688 control_state = priv->control_state; 689 spin_unlock_irqrestore(&priv->lock, flags); 690 691 return control_state; 692 } 693 694 static int mct_u232_tiocmset (struct usb_serial_port *port, struct file *file, 695 unsigned int set, unsigned int clear) 696 { 697 struct usb_serial *serial = port->serial; 698 struct mct_u232_private *priv = usb_get_serial_port_data(port); 699 unsigned int control_state; 700 unsigned long flags; 701 702 dbg("%s", __FUNCTION__); 703 704 spin_lock_irqsave(&priv->lock, flags); 705 control_state = priv->control_state; 706 707 if (set & TIOCM_RTS) 708 control_state |= TIOCM_RTS; 709 if (set & TIOCM_DTR) 710 control_state |= TIOCM_DTR; 711 if (clear & TIOCM_RTS) 712 control_state &= ~TIOCM_RTS; 713 if (clear & TIOCM_DTR) 714 control_state &= ~TIOCM_DTR; 715 716 priv->control_state = control_state; 717 spin_unlock_irqrestore(&priv->lock, flags); 718 return mct_u232_set_modem_ctrl(serial, control_state); 719 } 720 721 static int mct_u232_ioctl (struct usb_serial_port *port, struct file * file, 722 unsigned int cmd, unsigned long arg) 723 { 724 dbg("%scmd=0x%x", __FUNCTION__, cmd); 725 726 /* Based on code from acm.c and others */ 727 switch (cmd) { 728 case TIOCMIWAIT: 729 /* wait for any of the 4 modem inputs (DCD,RI,DSR,CTS)*/ 730 /* TODO */ 731 return( 0 ); 732 733 case TIOCGICOUNT: 734 /* return count of modemline transitions */ 735 /* TODO */ 736 return 0; 737 738 default: 739 dbg("%s: arg not supported - 0x%04x", __FUNCTION__,cmd); 740 return(-ENOIOCTLCMD); 741 break; 742 } 743 return 0; 744 } /* mct_u232_ioctl */ 745 746 747 static int __init mct_u232_init (void) 748 { 749 int retval; 750 retval = usb_serial_register(&mct_u232_device); 751 if (retval) 752 goto failed_usb_serial_register; 753 retval = usb_register(&mct_u232_driver); 754 if (retval) 755 goto failed_usb_register; 756 info(DRIVER_DESC " " DRIVER_VERSION); 757 return 0; 758 failed_usb_register: 759 usb_serial_deregister(&mct_u232_device); 760 failed_usb_serial_register: 761 return retval; 762 } 763 764 765 static void __exit mct_u232_exit (void) 766 { 767 usb_deregister (&mct_u232_driver); 768 usb_serial_deregister (&mct_u232_device); 769 } 770 771 772 module_init (mct_u232_init); 773 module_exit(mct_u232_exit); 774 775 MODULE_AUTHOR( DRIVER_AUTHOR ); 776 MODULE_DESCRIPTION( DRIVER_DESC ); 777 MODULE_LICENSE("GPL"); 778 779 module_param(debug, bool, S_IRUGO | S_IWUSR); 780 MODULE_PARM_DESC(debug, "Debug enabled or not"); 781