1/* 2 * KLSI KL5KUSB105 chip RS232 converter driver 3 * 4 * Copyright (C) 2001 Utz-Uwe Haus <haus@uuhaus.de> 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 * All information about the device was acquired using SniffUSB ans snoopUSB 12 * on Windows98. 13 * It was written out of frustration with the PalmConnect USB Serial adapter 14 * sold by Palm Inc. 15 * Neither Palm, nor their contractor (MCCI) or their supplier (KLSI) provided 16 * information that was not already available. 17 * 18 * It seems that KLSI bought some silicon-design information from ScanLogic, 19 * whose SL11R processor is at the core of the KL5KUSB chipset from KLSI. 20 * KLSI has firmware available for their devices; it is probable that the 21 * firmware differs from that used by KLSI in their products. If you have an 22 * original KLSI device and can provide some information on it, I would be 23 * most interested in adding support for it here. If you have any information 24 * on the protocol used (or find errors in my reverse-engineered stuff), please 25 * let me know. 26 * 27 * The code was only tested with a PalmConnect USB adapter; if you 28 * are adventurous, try it with any KLSI-based device and let me know how it 29 * breaks so that I can fix it! 30 */ 31 32/* TODO: 33 * check modem line signals 34 * implement handshaking or decide that we do not support it 35 */ 36 37/* History: 38 * 0.3a - implemented pools of write URBs 39 * 0.3 - alpha version for public testing 40 * 0.2 - TIOCMGET works, so autopilot(1) can be used! 41 * 0.1 - can be used to to pilot-xfer -p /dev/ttyUSB0 -l 42 * 43 * The driver skeleton is mainly based on mct_u232.c and various other 44 * pieces of code shamelessly copied from the drivers/usb/serial/ directory. 45 */ 46 47 48#include <linux/kernel.h> 49#include <linux/errno.h> 50#include <linux/init.h> 51#include <linux/slab.h> 52#include <linux/tty.h> 53#include <linux/tty_driver.h> 54#include <linux/tty_flip.h> 55#include <linux/module.h> 56#include <asm/uaccess.h> 57#include <linux/usb.h> 58#include <linux/usb/serial.h> 59#include "kl5kusb105.h" 60 61static int debug; 62 63/* 64 * Version Information 65 */ 66#define DRIVER_VERSION "v0.3a" 67#define DRIVER_AUTHOR "Utz-Uwe Haus <haus@uuhaus.de>" 68#define DRIVER_DESC "KLSI KL5KUSB105 chipset USB->Serial Converter driver" 69 70 71/* 72 * Function prototypes 73 */ 74static int klsi_105_startup (struct usb_serial *serial); 75static void klsi_105_shutdown (struct usb_serial *serial); 76static int klsi_105_open (struct usb_serial_port *port, 77 struct file *filp); 78static void klsi_105_close (struct usb_serial_port *port, 79 struct file *filp); 80static int klsi_105_write (struct usb_serial_port *port, 81 const unsigned char *buf, 82 int count); 83static void klsi_105_write_bulk_callback (struct urb *urb); 84static int klsi_105_chars_in_buffer (struct usb_serial_port *port); 85static int klsi_105_write_room (struct usb_serial_port *port); 86 87static void klsi_105_read_bulk_callback (struct urb *urb); 88static void klsi_105_set_termios (struct usb_serial_port *port, 89 struct ktermios *old); 90static void klsi_105_throttle (struct usb_serial_port *port); 91static void klsi_105_unthrottle (struct usb_serial_port *port); 92/* 93static void klsi_105_break_ctl (struct usb_serial_port *port, 94 int break_state ); 95 */ 96static int klsi_105_tiocmget (struct usb_serial_port *port, 97 struct file *file); 98static int klsi_105_tiocmset (struct usb_serial_port *port, 99 struct file *file, unsigned int set, 100 unsigned int clear); 101 102/* 103 * All of the device info needed for the KLSI converters. 104 */ 105static struct usb_device_id id_table [] = { 106 { USB_DEVICE(PALMCONNECT_VID, PALMCONNECT_PID) }, 107 { USB_DEVICE(KLSI_VID, KLSI_KL5KUSB105D_PID) }, 108 { } /* Terminating entry */ 109}; 110 111MODULE_DEVICE_TABLE (usb, id_table); 112 113static struct usb_driver kl5kusb105d_driver = { 114 .name = "kl5kusb105d", 115 .probe = usb_serial_probe, 116 .disconnect = usb_serial_disconnect, 117 .id_table = id_table, 118 .no_dynamic_id = 1, 119}; 120 121static struct usb_serial_driver kl5kusb105d_device = { 122 .driver = { 123 .owner = THIS_MODULE, 124 .name = "kl5kusb105d", 125 }, 126 .description = "KL5KUSB105D / PalmConnect", 127 .usb_driver = &kl5kusb105d_driver, 128 .id_table = id_table, 129 .num_interrupt_in = 1, 130 .num_bulk_in = 1, 131 .num_bulk_out = 1, 132 .num_ports = 1, 133 .open = klsi_105_open, 134 .close = klsi_105_close, 135 .write = klsi_105_write, 136 .write_bulk_callback = klsi_105_write_bulk_callback, 137 .chars_in_buffer = klsi_105_chars_in_buffer, 138 .write_room = klsi_105_write_room, 139 .read_bulk_callback =klsi_105_read_bulk_callback, 140 .set_termios = klsi_105_set_termios, 141 /*.break_ctl = klsi_105_break_ctl,*/ 142 .tiocmget = klsi_105_tiocmget, 143 .tiocmset = klsi_105_tiocmset, 144 .attach = klsi_105_startup, 145 .shutdown = klsi_105_shutdown, 146 .throttle = klsi_105_throttle, 147 .unthrottle = klsi_105_unthrottle, 148}; 149 150struct klsi_105_port_settings { 151 __u8 pktlen; /* always 5, it seems */ 152 __u8 baudrate; 153 __u8 databits; 154 __u8 unknown1; 155 __u8 unknown2; 156} __attribute__ ((packed)); 157 158/* we implement a pool of NUM_URBS urbs per usb_serial */ 159#define NUM_URBS 1 160#define URB_TRANSFER_BUFFER_SIZE 64 161struct klsi_105_private { 162 struct klsi_105_port_settings cfg; 163 struct ktermios termios; 164 unsigned long line_state; /* modem line settings */ 165 /* write pool */ 166 struct urb * write_urb_pool[NUM_URBS]; 167 spinlock_t lock; 168 unsigned long bytes_in; 169 unsigned long bytes_out; 170}; 171 172 173/* 174 * Handle vendor specific USB requests 175 */ 176 177 178#define KLSI_TIMEOUT 5000 /* default urb timeout */ 179 180static int klsi_105_chg_port_settings(struct usb_serial_port *port, 181 struct klsi_105_port_settings *settings) 182{ 183 int rc; 184 185 rc = usb_control_msg(port->serial->dev, 186 usb_sndctrlpipe(port->serial->dev, 0), 187 KL5KUSB105A_SIO_SET_DATA, 188 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_INTERFACE, 189 0, /* value */ 190 0, /* index */ 191 settings, 192 sizeof(struct klsi_105_port_settings), 193 KLSI_TIMEOUT); 194 if (rc < 0) 195 err("Change port settings failed (error = %d)", rc); 196 info("%s - %d byte block, baudrate %x, databits %d, u1 %d, u2 %d", 197 __FUNCTION__, 198 settings->pktlen, 199 settings->baudrate, settings->databits, 200 settings->unknown1, settings->unknown2); 201 return rc; 202} /* klsi_105_chg_port_settings */ 203 204/* translate a 16-bit status value from the device to linux's TIO bits */ 205static unsigned long klsi_105_status2linestate(const __u16 status) 206{ 207 unsigned long res = 0; 208 209 res = ((status & KL5KUSB105A_DSR) ? TIOCM_DSR : 0) 210 | ((status & KL5KUSB105A_CTS) ? TIOCM_CTS : 0) 211 ; 212 213 return res; 214} 215/* 216 * Read line control via vendor command and return result through 217 * *line_state_p 218 */ 219/* It seems that the status buffer has always only 2 bytes length */ 220#define KLSI_STATUSBUF_LEN 2 221static int klsi_105_get_line_state(struct usb_serial_port *port, 222 unsigned long *line_state_p) 223{ 224 int rc; 225 __u8 status_buf[KLSI_STATUSBUF_LEN] = { -1,-1}; 226 __u16 status; 227 228 info("%s - sending SIO Poll request", __FUNCTION__); 229 rc = usb_control_msg(port->serial->dev, 230 usb_rcvctrlpipe(port->serial->dev, 0), 231 KL5KUSB105A_SIO_POLL, 232 USB_TYPE_VENDOR | USB_DIR_IN, 233 0, /* value */ 234 0, /* index */ 235 status_buf, KLSI_STATUSBUF_LEN, 236 10000 237 ); 238 if (rc < 0) 239 err("Reading line status failed (error = %d)", rc); 240 else { 241 status = le16_to_cpu(*(u16 *)status_buf); 242 243 info("%s - read status %x %x", __FUNCTION__, 244 status_buf[0], status_buf[1]); 245 246 *line_state_p = klsi_105_status2linestate(status); 247 } 248 249 return rc; 250} 251 252 253/* 254 * Driver's tty interface functions 255 */ 256 257static int klsi_105_startup (struct usb_serial *serial) 258{ 259 struct klsi_105_private *priv; 260 int i, j; 261 262 263 /* allocate the private data structure */ 264 for (i=0; i<serial->num_ports; i++) { 265 priv = kmalloc(sizeof(struct klsi_105_private), 266 GFP_KERNEL); 267 if (!priv) { 268 dbg("%skmalloc for klsi_105_private failed.", __FUNCTION__); 269 i--; 270 goto err_cleanup; 271 } 272 /* set initial values for control structures */ 273 priv->cfg.pktlen = 5; 274 priv->cfg.baudrate = kl5kusb105a_sio_b9600; 275 priv->cfg.databits = kl5kusb105a_dtb_8; 276 priv->cfg.unknown1 = 0; 277 priv->cfg.unknown2 = 1; 278 279 priv->line_state = 0; 280 281 priv->bytes_in = 0; 282 priv->bytes_out = 0; 283 usb_set_serial_port_data(serial->port[i], priv); 284 285 spin_lock_init (&priv->lock); 286 for (j=0; j<NUM_URBS; j++) { 287 struct urb* urb = usb_alloc_urb(0, GFP_KERNEL); 288 289 priv->write_urb_pool[j] = urb; 290 if (urb == NULL) { 291 err("No more urbs???"); 292 goto err_cleanup; 293 } 294 295 urb->transfer_buffer = kmalloc (URB_TRANSFER_BUFFER_SIZE, 296 GFP_KERNEL); 297 if (!urb->transfer_buffer) { 298 err("%s - out of memory for urb buffers.", __FUNCTION__); 299 goto err_cleanup; 300 } 301 } 302 303 /* priv->termios is left uninitalized until port opening */ 304 init_waitqueue_head(&serial->port[i]->write_wait); 305 } 306 307 return 0; 308 309err_cleanup: 310 for (; i >= 0; i--) { 311 priv = usb_get_serial_port_data(serial->port[i]); 312 for (j=0; j < NUM_URBS; j++) { 313 if (priv->write_urb_pool[j]) { 314 kfree(priv->write_urb_pool[j]->transfer_buffer); 315 usb_free_urb(priv->write_urb_pool[j]); 316 } 317 } 318 usb_set_serial_port_data(serial->port[i], NULL); 319 } 320 return -ENOMEM; 321} /* klsi_105_startup */ 322 323 324static void klsi_105_shutdown (struct usb_serial *serial) 325{ 326 int i; 327 328 dbg("%s", __FUNCTION__); 329 330 /* stop reads and writes on all ports */ 331 for (i=0; i < serial->num_ports; ++i) { 332 struct klsi_105_private *priv = usb_get_serial_port_data(serial->port[i]); 333 unsigned long flags; 334 335 if (priv) { 336 /* kill our write urb pool */ 337 int j; 338 struct urb **write_urbs = priv->write_urb_pool; 339 spin_lock_irqsave(&priv->lock,flags); 340 341 for (j = 0; j < NUM_URBS; j++) { 342 if (write_urbs[j]) { 343 /* usb_kill_urb(write_urbs[j]); */ 344 kfree(write_urbs[j]->transfer_buffer); 345 usb_free_urb (write_urbs[j]); 346 } 347 } 348 349 spin_unlock_irqrestore (&priv->lock, flags); 350 351 kfree(priv); 352 usb_set_serial_port_data(serial->port[i], NULL); 353 } 354 } 355} /* klsi_105_shutdown */ 356 357static int klsi_105_open (struct usb_serial_port *port, struct file *filp) 358{ 359 struct klsi_105_private *priv = usb_get_serial_port_data(port); 360 int retval = 0; 361 int rc; 362 int i; 363 unsigned long line_state; 364 struct klsi_105_port_settings cfg; 365 unsigned long flags; 366 367 dbg("%s port %d", __FUNCTION__, port->number); 368 369 /* force low_latency on so that our tty_push actually forces 370 * the data through 371 * port->tty->low_latency = 1; */ 372 373 cfg.pktlen = 5; 374 cfg.baudrate = kl5kusb105a_sio_b9600; 375 cfg.databits = kl5kusb105a_dtb_8; 376 cfg.unknown1 = 0; 377 cfg.unknown2 = 1; 378 klsi_105_chg_port_settings(port, &cfg); 379 380 /* set up termios structure */ 381 spin_lock_irqsave (&priv->lock, flags); 382 priv->termios.c_iflag = port->tty->termios->c_iflag; 383 priv->termios.c_oflag = port->tty->termios->c_oflag; 384 priv->termios.c_cflag = port->tty->termios->c_cflag; 385 priv->termios.c_lflag = port->tty->termios->c_lflag; 386 for (i=0; i<NCCS; i++) 387 priv->termios.c_cc[i] = port->tty->termios->c_cc[i]; 388 priv->cfg.pktlen = cfg.pktlen; 389 priv->cfg.baudrate = cfg.baudrate; 390 priv->cfg.databits = cfg.databits; 391 priv->cfg.unknown1 = cfg.unknown1; 392 priv->cfg.unknown2 = cfg.unknown2; 393 spin_unlock_irqrestore (&priv->lock, flags); 394 395 /* READ_ON and urb submission */ 396 usb_fill_bulk_urb(port->read_urb, port->serial->dev, 397 usb_rcvbulkpipe(port->serial->dev, 398 port->bulk_in_endpointAddress), 399 port->read_urb->transfer_buffer, 400 port->read_urb->transfer_buffer_length, 401 klsi_105_read_bulk_callback, 402 port); 403 404 rc = usb_submit_urb(port->read_urb, GFP_KERNEL); 405 if (rc) { 406 err("%s - failed submitting read urb, error %d", __FUNCTION__, rc); 407 retval = rc; 408 goto exit; 409 } 410 411 rc = usb_control_msg(port->serial->dev, 412 usb_sndctrlpipe(port->serial->dev,0), 413 KL5KUSB105A_SIO_CONFIGURE, 414 USB_TYPE_VENDOR|USB_DIR_OUT|USB_RECIP_INTERFACE, 415 KL5KUSB105A_SIO_CONFIGURE_READ_ON, 416 0, /* index */ 417 NULL, 418 0, 419 KLSI_TIMEOUT); 420 if (rc < 0) { 421 err("Enabling read failed (error = %d)", rc); 422 retval = rc; 423 } else 424 dbg("%s - enabled reading", __FUNCTION__); 425 426 rc = klsi_105_get_line_state(port, &line_state); 427 if (rc >= 0) { 428 spin_lock_irqsave (&priv->lock, flags); 429 priv->line_state = line_state; 430 spin_unlock_irqrestore (&priv->lock, flags); 431 dbg("%s - read line state 0x%lx", __FUNCTION__, line_state); 432 retval = 0; 433 } else 434 retval = rc; 435 436exit: 437 return retval; 438} /* klsi_105_open */ 439 440 441static void klsi_105_close (struct usb_serial_port *port, struct file *filp) 442{ 443 struct klsi_105_private *priv = usb_get_serial_port_data(port); 444 int rc; 445 446 dbg("%s port %d", __FUNCTION__, port->number); 447 448 /* send READ_OFF */ 449 rc = usb_control_msg (port->serial->dev, 450 usb_sndctrlpipe(port->serial->dev, 0), 451 KL5KUSB105A_SIO_CONFIGURE, 452 USB_TYPE_VENDOR | USB_DIR_OUT, 453 KL5KUSB105A_SIO_CONFIGURE_READ_OFF, 454 0, /* index */ 455 NULL, 0, 456 KLSI_TIMEOUT); 457 if (rc < 0) 458 err("Disabling read failed (error = %d)", rc); 459 460 /* shutdown our bulk reads and writes */ 461 usb_kill_urb(port->write_urb); 462 usb_kill_urb(port->read_urb); 463 /* unlink our write pool */ 464 /* wgg - do I need this? I think so. */ 465 usb_kill_urb(port->interrupt_in_urb); 466 info("kl5kusb105 port stats: %ld bytes in, %ld bytes out", priv->bytes_in, priv->bytes_out); 467} /* klsi_105_close */ 468 469 470/* We need to write a complete 64-byte data block and encode the 471 * number actually sent in the first double-byte, LSB-order. That 472 * leaves at most 62 bytes of payload. 473 */ 474#define KLSI_105_DATA_OFFSET 2 /* in the bulk urb data block */ 475 476 477static int klsi_105_write (struct usb_serial_port *port, 478 const unsigned char *buf, int count) 479{ 480 struct klsi_105_private *priv = usb_get_serial_port_data(port); 481 int result, size; 482 int bytes_sent=0; 483 484 dbg("%s - port %d", __FUNCTION__, port->number); 485 486 while (count > 0) { 487 /* try to find a free urb (write 0 bytes if none) */ 488 struct urb *urb = NULL; 489 unsigned long flags; 490 int i; 491 /* since the pool is per-port we might not need the spin lock !? */ 492 spin_lock_irqsave (&priv->lock, flags); 493 for (i=0; i<NUM_URBS; i++) { 494 if (priv->write_urb_pool[i]->status != -EINPROGRESS) { 495 urb = priv->write_urb_pool[i]; 496 dbg("%s - using pool URB %d", __FUNCTION__, i); 497 break; 498 } 499 } 500 spin_unlock_irqrestore (&priv->lock, flags); 501 502 if (urb==NULL) { 503 dbg("%s - no more free urbs", __FUNCTION__); 504 goto exit; 505 } 506 507 if (urb->transfer_buffer == NULL) { 508 urb->transfer_buffer = kmalloc (URB_TRANSFER_BUFFER_SIZE, GFP_ATOMIC); 509 if (urb->transfer_buffer == NULL) { 510 err("%s - no more kernel memory...", __FUNCTION__); 511 goto exit; 512 } 513 } 514 515 size = min (count, port->bulk_out_size - KLSI_105_DATA_OFFSET); 516 size = min (size, URB_TRANSFER_BUFFER_SIZE - KLSI_105_DATA_OFFSET); 517 518 memcpy (urb->transfer_buffer + KLSI_105_DATA_OFFSET, buf, size); 519 520 /* write payload size into transfer buffer */ 521 ((__u8 *)urb->transfer_buffer)[0] = (__u8) (size & 0xFF); 522 ((__u8 *)urb->transfer_buffer)[1] = (__u8) ((size & 0xFF00)>>8); 523 524 /* set up our urb */ 525 usb_fill_bulk_urb(urb, port->serial->dev, 526 usb_sndbulkpipe(port->serial->dev, 527 port->bulk_out_endpointAddress), 528 urb->transfer_buffer, 529 URB_TRANSFER_BUFFER_SIZE, 530 klsi_105_write_bulk_callback, 531 port); 532 533 /* send the data out the bulk port */ 534 result = usb_submit_urb(urb, GFP_ATOMIC); 535 if (result) { 536 err("%s - failed submitting write urb, error %d", __FUNCTION__, result); 537 goto exit; 538 } 539 buf += size; 540 bytes_sent += size; 541 count -= size; 542 } 543exit: 544 /* lockless, but it's for debug info only... */ 545 priv->bytes_out+=bytes_sent; 546 547 return bytes_sent; /* that's how much we wrote */ 548} /* klsi_105_write */ 549 550static void klsi_105_write_bulk_callback ( struct urb *urb) 551{ 552 struct usb_serial_port *port = (struct usb_serial_port *)urb->context; 553 554 dbg("%s - port %d", __FUNCTION__, port->number); 555 556 if (urb->status) { 557 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, 558 urb->status); 559 return; 560 } 561 562 usb_serial_port_softint(port); 563} /* klsi_105_write_bulk_completion_callback */ 564 565 566/* return number of characters currently in the writing process */ 567static int klsi_105_chars_in_buffer (struct usb_serial_port *port) 568{ 569 int chars = 0; 570 int i; 571 unsigned long flags; 572 struct klsi_105_private *priv = usb_get_serial_port_data(port); 573 574 spin_lock_irqsave (&priv->lock, flags); 575 576 for (i = 0; i < NUM_URBS; ++i) { 577 if (priv->write_urb_pool[i]->status == -EINPROGRESS) { 578 chars += URB_TRANSFER_BUFFER_SIZE; 579 } 580 } 581 582 spin_unlock_irqrestore (&priv->lock, flags); 583 584 dbg("%s - returns %d", __FUNCTION__, chars); 585 return (chars); 586} 587 588static int klsi_105_write_room (struct usb_serial_port *port) 589{ 590 unsigned long flags; 591 int i; 592 int room = 0; 593 struct klsi_105_private *priv = usb_get_serial_port_data(port); 594 595 spin_lock_irqsave (&priv->lock, flags); 596 for (i = 0; i < NUM_URBS; ++i) { 597 if (priv->write_urb_pool[i]->status != -EINPROGRESS) { 598 room += URB_TRANSFER_BUFFER_SIZE; 599 } 600 } 601 602 spin_unlock_irqrestore (&priv->lock, flags); 603 604 dbg("%s - returns %d", __FUNCTION__, room); 605 return (room); 606} 607 608 609 610static void klsi_105_read_bulk_callback (struct urb *urb) 611{ 612 struct usb_serial_port *port = (struct usb_serial_port *)urb->context; 613 struct klsi_105_private *priv = usb_get_serial_port_data(port); 614 struct tty_struct *tty; 615 unsigned char *data = urb->transfer_buffer; 616 int rc; 617 618 dbg("%s - port %d", __FUNCTION__, port->number); 619 620 /* The urb might have been killed. */ 621 if (urb->status) { 622 dbg("%s - nonzero read bulk status received: %d", __FUNCTION__, 623 urb->status); 624 return; 625 } 626 627 /* The data received is again preceded by a length double-byte in LSB- 628 * first order (see klsi_105_write() ) 629 */ 630 if (urb->actual_length == 0) { 631 /* empty urbs seem to happen, we ignore them */ 632 /* dbg("%s - emtpy URB", __FUNCTION__); */ 633 ; 634 } else if (urb->actual_length <= 2) { 635 dbg("%s - size %d URB not understood", __FUNCTION__, 636 urb->actual_length); 637 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, 638 urb->actual_length, data); 639 } else { 640 int bytes_sent = ((__u8 *) data)[0] + 641 ((unsigned int) ((__u8 *) data)[1] << 8); 642 tty = port->tty; 643 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, 644 urb->actual_length, data); 645 646 if (bytes_sent + 2 > urb->actual_length) { 647 dbg("%s - trying to read more data than available" 648 " (%d vs. %d)", __FUNCTION__, 649 bytes_sent+2, urb->actual_length); 650 /* cap at implied limit */ 651 bytes_sent = urb->actual_length - 2; 652 } 653 654 tty_buffer_request_room(tty, bytes_sent); 655 tty_insert_flip_string(tty, data + 2, bytes_sent); 656 tty_flip_buffer_push(tty); 657 658 /* again lockless, but debug info only */ 659 priv->bytes_in += bytes_sent; 660 } 661 /* Continue trying to always read */ 662 usb_fill_bulk_urb(port->read_urb, port->serial->dev, 663 usb_rcvbulkpipe(port->serial->dev, 664 port->bulk_in_endpointAddress), 665 port->read_urb->transfer_buffer, 666 port->read_urb->transfer_buffer_length, 667 klsi_105_read_bulk_callback, 668 port); 669 rc = usb_submit_urb(port->read_urb, GFP_ATOMIC); 670 if (rc) 671 err("%s - failed resubmitting read urb, error %d", __FUNCTION__, rc); 672} /* klsi_105_read_bulk_callback */ 673 674 675static void klsi_105_set_termios (struct usb_serial_port *port, 676 struct ktermios *old_termios) 677{ 678 struct klsi_105_private *priv = usb_get_serial_port_data(port); 679 unsigned int iflag = port->tty->termios->c_iflag; 680 unsigned int old_iflag = old_termios->c_iflag; 681 unsigned int cflag = port->tty->termios->c_cflag; 682 unsigned int old_cflag = old_termios->c_cflag; 683 struct klsi_105_port_settings cfg; 684 unsigned long flags; 685 686 /* lock while we are modifying the settings */ 687 spin_lock_irqsave (&priv->lock, flags); 688 689 /* 690 * Update baud rate 691 */ 692 if( (cflag & CBAUD) != (old_cflag & CBAUD) ) { 693 /* reassert DTR and (maybe) RTS on transition from B0 */ 694 if( (old_cflag & CBAUD) == B0 ) { 695 dbg("%s: baud was B0", __FUNCTION__); 696 } 697 698 switch(cflag & CBAUD) { 699 case B0: /* handled below */ 700 break; 701 case B1200: priv->cfg.baudrate = kl5kusb105a_sio_b1200; 702 break; 703 case B2400: priv->cfg.baudrate = kl5kusb105a_sio_b2400; 704 break; 705 case B4800: priv->cfg.baudrate = kl5kusb105a_sio_b4800; 706 break; 707 case B9600: priv->cfg.baudrate = kl5kusb105a_sio_b9600; 708 break; 709 case B19200: priv->cfg.baudrate = kl5kusb105a_sio_b19200; 710 break; 711 case B38400: priv->cfg.baudrate = kl5kusb105a_sio_b38400; 712 break; 713 case B57600: priv->cfg.baudrate = kl5kusb105a_sio_b57600; 714 break; 715 case B115200: priv->cfg.baudrate = kl5kusb105a_sio_b115200; 716 break; 717 default: 718 err("KLSI USB->Serial converter:" 719 " unsupported baudrate request, using default" 720 " of 9600"); 721 priv->cfg.baudrate = kl5kusb105a_sio_b9600; 722 break; 723 } 724 if ((cflag & CBAUD) == B0 ) { 725 dbg("%s: baud is B0", __FUNCTION__); 726 /* Drop RTS and DTR */ 727 /* maybe this should be simulated by sending read 728 * disable and read enable messages? 729 */ 730 ; 731 } 732 } 733 734 if ((cflag & CSIZE) != (old_cflag & CSIZE)) { 735 /* set the number of data bits */ 736 switch (cflag & CSIZE) { 737 case CS5: 738 dbg("%s - 5 bits/byte not supported", __FUNCTION__); 739 spin_unlock_irqrestore (&priv->lock, flags); 740 return ; 741 case CS6: 742 dbg("%s - 6 bits/byte not supported", __FUNCTION__); 743 spin_unlock_irqrestore (&priv->lock, flags); 744 return ; 745 case CS7: 746 priv->cfg.databits = kl5kusb105a_dtb_7; 747 break; 748 case CS8: 749 priv->cfg.databits = kl5kusb105a_dtb_8; 750 break; 751 default: 752 err("CSIZE was not CS5-CS8, using default of 8"); 753 priv->cfg.databits = kl5kusb105a_dtb_8; 754 break; 755 } 756 } 757 758 /* 759 * Update line control register (LCR) 760 */ 761 if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD)) 762 || (cflag & CSTOPB) != (old_cflag & CSTOPB) ) { 763 764 ; 765 } 766 767 /* 768 * Set flow control: well, I do not really now how to handle DTR/RTS. 769 * Just do what we have seen with SniffUSB on Win98. 770 */ 771 if( (iflag & IXOFF) != (old_iflag & IXOFF) 772 || (iflag & IXON) != (old_iflag & IXON) 773 || (cflag & CRTSCTS) != (old_cflag & CRTSCTS) ) { 774 775 /* Drop DTR/RTS if no flow control otherwise assert */ 776 ; 777 } 778 memcpy (&cfg, &priv->cfg, sizeof(cfg)); 779 spin_unlock_irqrestore (&priv->lock, flags); 780 781 /* now commit changes to device */ 782 klsi_105_chg_port_settings(port, &cfg); 783} /* klsi_105_set_termios */ 784 785 786 787static int klsi_105_tiocmget (struct usb_serial_port *port, struct file *file) 788{ 789 struct klsi_105_private *priv = usb_get_serial_port_data(port); 790 unsigned long flags; 791 int rc; 792 unsigned long line_state; 793 dbg("%s - request, just guessing", __FUNCTION__); 794 795 rc = klsi_105_get_line_state(port, &line_state); 796 if (rc < 0) { 797 err("Reading line control failed (error = %d)", rc); 798 /* better return value? EAGAIN? */ 799 return rc; 800 } 801 802 spin_lock_irqsave (&priv->lock, flags); 803 priv->line_state = line_state; 804 spin_unlock_irqrestore (&priv->lock, flags); 805 dbg("%s - read line state 0x%lx", __FUNCTION__, line_state); 806 return (int)line_state; 807} 808 809static int klsi_105_tiocmset (struct usb_serial_port *port, struct file *file, 810 unsigned int set, unsigned int clear) 811{ 812 int retval = -EINVAL; 813 814 dbg("%s", __FUNCTION__); 815 816/* if this ever gets implemented, it should be done something like this: 817 struct usb_serial *serial = port->serial; 818 struct klsi_105_private *priv = usb_get_serial_port_data(port); 819 unsigned long flags; 820 int control; 821 822 spin_lock_irqsave (&priv->lock, flags); 823 if (set & TIOCM_RTS) 824 priv->control_state |= TIOCM_RTS; 825 if (set & TIOCM_DTR) 826 priv->control_state |= TIOCM_DTR; 827 if (clear & TIOCM_RTS) 828 priv->control_state &= ~TIOCM_RTS; 829 if (clear & TIOCM_DTR) 830 priv->control_state &= ~TIOCM_DTR; 831 control = priv->control_state; 832 spin_unlock_irqrestore (&priv->lock, flags); 833 retval = mct_u232_set_modem_ctrl(serial, control); 834*/ 835 return retval; 836} 837 838static void klsi_105_throttle (struct usb_serial_port *port) 839{ 840 dbg("%s - port %d", __FUNCTION__, port->number); 841 usb_kill_urb(port->read_urb); 842} 843 844static void klsi_105_unthrottle (struct usb_serial_port *port) 845{ 846 int result; 847 848 dbg("%s - port %d", __FUNCTION__, port->number); 849 850 port->read_urb->dev = port->serial->dev; 851 result = usb_submit_urb(port->read_urb, GFP_ATOMIC); 852 if (result) 853 err("%s - failed submitting read urb, error %d", __FUNCTION__, 854 result); 855} 856 857 858 859static int __init klsi_105_init (void) 860{ 861 int retval; 862 retval = usb_serial_register(&kl5kusb105d_device); 863 if (retval) 864 goto failed_usb_serial_register; 865 retval = usb_register(&kl5kusb105d_driver); 866 if (retval) 867 goto failed_usb_register; 868 869 info(DRIVER_DESC " " DRIVER_VERSION); 870 return 0; 871failed_usb_register: 872 usb_serial_deregister(&kl5kusb105d_device); 873failed_usb_serial_register: 874 return retval; 875} 876 877 878static void __exit klsi_105_exit (void) 879{ 880 usb_deregister (&kl5kusb105d_driver); 881 usb_serial_deregister (&kl5kusb105d_device); 882} 883 884 885module_init (klsi_105_init); 886module_exit (klsi_105_exit); 887 888MODULE_AUTHOR( DRIVER_AUTHOR ); 889MODULE_DESCRIPTION( DRIVER_DESC ); 890MODULE_LICENSE("GPL"); 891 892 893module_param(debug, bool, S_IRUGO | S_IWUSR); 894MODULE_PARM_DESC(debug, "enable extensive debugging messages"); 895 896/* vim: set sts=8 ts=8 sw=8: */ 897