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 61 static 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 */ 74 static int klsi_105_startup (struct usb_serial *serial); 75 static void klsi_105_shutdown (struct usb_serial *serial); 76 static int klsi_105_open (struct usb_serial_port *port, 77 struct file *filp); 78 static void klsi_105_close (struct usb_serial_port *port, 79 struct file *filp); 80 static int klsi_105_write (struct usb_serial_port *port, 81 const unsigned char *buf, 82 int count); 83 static void klsi_105_write_bulk_callback (struct urb *urb); 84 static int klsi_105_chars_in_buffer (struct usb_serial_port *port); 85 static int klsi_105_write_room (struct usb_serial_port *port); 86 87 static void klsi_105_read_bulk_callback (struct urb *urb); 88 static void klsi_105_set_termios (struct usb_serial_port *port, 89 struct ktermios *old); 90 static void klsi_105_throttle (struct usb_serial_port *port); 91 static void klsi_105_unthrottle (struct usb_serial_port *port); 92 /* 93 static void klsi_105_break_ctl (struct usb_serial_port *port, 94 int break_state ); 95 */ 96 static int klsi_105_tiocmget (struct usb_serial_port *port, 97 struct file *file); 98 static 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 */ 105 static 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 }; 110 111 MODULE_DEVICE_TABLE (usb, id_table); 112 113 static 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 }; 120 121 static 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 }; 149 150 struct 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 64 161 struct 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 */ 179 180 static 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 */ 205 static 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 2 221 static 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 = status_buf[0] + (status_buf[1]<<8); 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 */ 256 257 static int klsi_105_startup (struct usb_serial *serial) 258 { 259 struct klsi_105_private *priv; 260 int i; 261 262 /* check if we support the product id (see keyspan.c) 263 * FIXME 264 */ 265 266 /* allocate the private data structure */ 267 for (i=0; i<serial->num_ports; i++) { 268 int j; 269 priv = kmalloc(sizeof(struct klsi_105_private), 270 GFP_KERNEL); 271 if (!priv) { 272 dbg("%skmalloc for klsi_105_private failed.", __FUNCTION__); 273 return -ENOMEM; 274 } 275 /* set initial values for control structures */ 276 priv->cfg.pktlen = 5; 277 priv->cfg.baudrate = kl5kusb105a_sio_b9600; 278 priv->cfg.databits = kl5kusb105a_dtb_8; 279 priv->cfg.unknown1 = 0; 280 priv->cfg.unknown2 = 1; 281 282 priv->line_state = 0; 283 284 priv->bytes_in = 0; 285 priv->bytes_out = 0; 286 usb_set_serial_port_data(serial->port[i], priv); 287 288 spin_lock_init (&priv->lock); 289 for (j=0; j<NUM_URBS; j++) { 290 struct urb* urb = usb_alloc_urb(0, GFP_KERNEL); 291 292 priv->write_urb_pool[j] = urb; 293 if (urb == NULL) { 294 err("No more urbs???"); 295 continue; 296 } 297 298 urb->transfer_buffer = NULL; 299 urb->transfer_buffer = kmalloc (URB_TRANSFER_BUFFER_SIZE, 300 GFP_KERNEL); 301 if (!urb->transfer_buffer) { 302 err("%s - out of memory for urb buffers.", __FUNCTION__); 303 continue; 304 } 305 } 306 307 /* priv->termios is left uninitalized until port opening */ 308 init_waitqueue_head(&serial->port[i]->write_wait); 309 } 310 311 return (0); 312 } /* klsi_105_startup */ 313 314 315 static void klsi_105_shutdown (struct usb_serial *serial) 316 { 317 int i; 318 319 dbg("%s", __FUNCTION__); 320 321 /* stop reads and writes on all ports */ 322 for (i=0; i < serial->num_ports; ++i) { 323 struct klsi_105_private *priv = usb_get_serial_port_data(serial->port[i]); 324 unsigned long flags; 325 326 if (priv) { 327 /* kill our write urb pool */ 328 int j; 329 struct urb **write_urbs = priv->write_urb_pool; 330 spin_lock_irqsave(&priv->lock,flags); 331 332 for (j = 0; j < NUM_URBS; j++) { 333 if (write_urbs[j]) { 334 /* FIXME - uncomment the following 335 * usb_kill_urb call when the host 336 * controllers get fixed to set 337 * urb->dev = NULL after the urb is 338 * finished. Otherwise this call 339 * oopses. */ 340 /* usb_kill_urb(write_urbs[j]); */ 341 kfree(write_urbs[j]->transfer_buffer); 342 usb_free_urb (write_urbs[j]); 343 } 344 } 345 346 spin_unlock_irqrestore (&priv->lock, flags); 347 348 kfree(priv); 349 usb_set_serial_port_data(serial->port[i], NULL); 350 } 351 } 352 } /* klsi_105_shutdown */ 353 354 static int klsi_105_open (struct usb_serial_port *port, struct file *filp) 355 { 356 struct klsi_105_private *priv = usb_get_serial_port_data(port); 357 int retval = 0; 358 int rc; 359 int i; 360 unsigned long line_state; 361 struct klsi_105_port_settings cfg; 362 unsigned long flags; 363 364 dbg("%s port %d", __FUNCTION__, port->number); 365 366 /* force low_latency on so that our tty_push actually forces 367 * the data through 368 * port->tty->low_latency = 1; */ 369 370 /* Do a defined restart: 371 * Set up sane default baud rate and send the 'READ_ON' 372 * vendor command. 373 * FIXME: set modem line control (how?) 374 * Then read the modem line control and store values in 375 * priv->line_state. 376 */ 377 cfg.pktlen = 5; 378 cfg.baudrate = kl5kusb105a_sio_b9600; 379 cfg.databits = kl5kusb105a_dtb_8; 380 cfg.unknown1 = 0; 381 cfg.unknown2 = 1; 382 klsi_105_chg_port_settings(port, &cfg); 383 384 /* set up termios structure */ 385 spin_lock_irqsave (&priv->lock, flags); 386 priv->termios.c_iflag = port->tty->termios->c_iflag; 387 priv->termios.c_oflag = port->tty->termios->c_oflag; 388 priv->termios.c_cflag = port->tty->termios->c_cflag; 389 priv->termios.c_lflag = port->tty->termios->c_lflag; 390 for (i=0; i<NCCS; i++) 391 priv->termios.c_cc[i] = port->tty->termios->c_cc[i]; 392 priv->cfg.pktlen = cfg.pktlen; 393 priv->cfg.baudrate = cfg.baudrate; 394 priv->cfg.databits = cfg.databits; 395 priv->cfg.unknown1 = cfg.unknown1; 396 priv->cfg.unknown2 = cfg.unknown2; 397 spin_unlock_irqrestore (&priv->lock, flags); 398 399 /* READ_ON and urb submission */ 400 usb_fill_bulk_urb(port->read_urb, port->serial->dev, 401 usb_rcvbulkpipe(port->serial->dev, 402 port->bulk_in_endpointAddress), 403 port->read_urb->transfer_buffer, 404 port->read_urb->transfer_buffer_length, 405 klsi_105_read_bulk_callback, 406 port); 407 408 rc = usb_submit_urb(port->read_urb, GFP_KERNEL); 409 if (rc) { 410 err("%s - failed submitting read urb, error %d", __FUNCTION__, rc); 411 retval = rc; 412 goto exit; 413 } 414 415 rc = usb_control_msg(port->serial->dev, 416 usb_sndctrlpipe(port->serial->dev,0), 417 KL5KUSB105A_SIO_CONFIGURE, 418 USB_TYPE_VENDOR|USB_DIR_OUT|USB_RECIP_INTERFACE, 419 KL5KUSB105A_SIO_CONFIGURE_READ_ON, 420 0, /* index */ 421 NULL, 422 0, 423 KLSI_TIMEOUT); 424 if (rc < 0) { 425 err("Enabling read failed (error = %d)", rc); 426 retval = rc; 427 } else 428 dbg("%s - enabled reading", __FUNCTION__); 429 430 rc = klsi_105_get_line_state(port, &line_state); 431 if (rc >= 0) { 432 spin_lock_irqsave (&priv->lock, flags); 433 priv->line_state = line_state; 434 spin_unlock_irqrestore (&priv->lock, flags); 435 dbg("%s - read line state 0x%lx", __FUNCTION__, line_state); 436 retval = 0; 437 } else 438 retval = rc; 439 440 exit: 441 return retval; 442 } /* klsi_105_open */ 443 444 445 static void klsi_105_close (struct usb_serial_port *port, struct file *filp) 446 { 447 struct klsi_105_private *priv = usb_get_serial_port_data(port); 448 int rc; 449 450 dbg("%s port %d", __FUNCTION__, port->number); 451 452 /* send READ_OFF */ 453 rc = usb_control_msg (port->serial->dev, 454 usb_sndctrlpipe(port->serial->dev, 0), 455 KL5KUSB105A_SIO_CONFIGURE, 456 USB_TYPE_VENDOR | USB_DIR_OUT, 457 KL5KUSB105A_SIO_CONFIGURE_READ_OFF, 458 0, /* index */ 459 NULL, 0, 460 KLSI_TIMEOUT); 461 if (rc < 0) 462 err("Disabling read failed (error = %d)", rc); 463 464 /* shutdown our bulk reads and writes */ 465 usb_kill_urb(port->write_urb); 466 usb_kill_urb(port->read_urb); 467 /* unlink our write pool */ 468 /* FIXME */ 469 /* wgg - do I need this? I think so. */ 470 usb_kill_urb(port->interrupt_in_urb); 471 info("kl5kusb105 port stats: %ld bytes in, %ld bytes out", priv->bytes_in, priv->bytes_out); 472 } /* klsi_105_close */ 473 474 475 /* We need to write a complete 64-byte data block and encode the 476 * number actually sent in the first double-byte, LSB-order. That 477 * leaves at most 62 bytes of payload. 478 */ 479 #define KLSI_105_DATA_OFFSET 2 /* in the bulk urb data block */ 480 481 482 static int klsi_105_write (struct usb_serial_port *port, 483 const unsigned char *buf, int count) 484 { 485 struct klsi_105_private *priv = usb_get_serial_port_data(port); 486 int result, size; 487 int bytes_sent=0; 488 489 dbg("%s - port %d", __FUNCTION__, port->number); 490 491 while (count > 0) { 492 /* try to find a free urb (write 0 bytes if none) */ 493 struct urb *urb = NULL; 494 unsigned long flags; 495 int i; 496 /* since the pool is per-port we might not need the spin lock !? */ 497 spin_lock_irqsave (&priv->lock, flags); 498 for (i=0; i<NUM_URBS; i++) { 499 if (priv->write_urb_pool[i]->status != -EINPROGRESS) { 500 urb = priv->write_urb_pool[i]; 501 dbg("%s - using pool URB %d", __FUNCTION__, i); 502 break; 503 } 504 } 505 spin_unlock_irqrestore (&priv->lock, flags); 506 507 if (urb==NULL) { 508 dbg("%s - no more free urbs", __FUNCTION__); 509 goto exit; 510 } 511 512 if (urb->transfer_buffer == NULL) { 513 urb->transfer_buffer = kmalloc (URB_TRANSFER_BUFFER_SIZE, GFP_ATOMIC); 514 if (urb->transfer_buffer == NULL) { 515 err("%s - no more kernel memory...", __FUNCTION__); 516 goto exit; 517 } 518 } 519 520 size = min (count, port->bulk_out_size - KLSI_105_DATA_OFFSET); 521 size = min (size, URB_TRANSFER_BUFFER_SIZE - KLSI_105_DATA_OFFSET); 522 523 memcpy (urb->transfer_buffer + KLSI_105_DATA_OFFSET, buf, size); 524 525 /* write payload size into transfer buffer */ 526 ((__u8 *)urb->transfer_buffer)[0] = (__u8) (size & 0xFF); 527 ((__u8 *)urb->transfer_buffer)[1] = (__u8) ((size & 0xFF00)>>8); 528 529 /* set up our urb */ 530 usb_fill_bulk_urb(urb, port->serial->dev, 531 usb_sndbulkpipe(port->serial->dev, 532 port->bulk_out_endpointAddress), 533 urb->transfer_buffer, 534 URB_TRANSFER_BUFFER_SIZE, 535 klsi_105_write_bulk_callback, 536 port); 537 538 /* send the data out the bulk port */ 539 result = usb_submit_urb(urb, GFP_ATOMIC); 540 if (result) { 541 err("%s - failed submitting write urb, error %d", __FUNCTION__, result); 542 goto exit; 543 } 544 buf += size; 545 bytes_sent += size; 546 count -= size; 547 } 548 exit: 549 /* lockless, but it's for debug info only... */ 550 priv->bytes_out+=bytes_sent; 551 552 return bytes_sent; /* that's how much we wrote */ 553 } /* klsi_105_write */ 554 555 static void klsi_105_write_bulk_callback ( struct urb *urb) 556 { 557 struct usb_serial_port *port = (struct usb_serial_port *)urb->context; 558 559 dbg("%s - port %d", __FUNCTION__, port->number); 560 561 if (urb->status) { 562 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, 563 urb->status); 564 return; 565 } 566 567 usb_serial_port_softint(port); 568 } /* klsi_105_write_bulk_completion_callback */ 569 570 571 /* return number of characters currently in the writing process */ 572 static int klsi_105_chars_in_buffer (struct usb_serial_port *port) 573 { 574 int chars = 0; 575 int i; 576 unsigned long flags; 577 struct klsi_105_private *priv = usb_get_serial_port_data(port); 578 579 spin_lock_irqsave (&priv->lock, flags); 580 581 for (i = 0; i < NUM_URBS; ++i) { 582 if (priv->write_urb_pool[i]->status == -EINPROGRESS) { 583 chars += URB_TRANSFER_BUFFER_SIZE; 584 } 585 } 586 587 spin_unlock_irqrestore (&priv->lock, flags); 588 589 dbg("%s - returns %d", __FUNCTION__, chars); 590 return (chars); 591 } 592 593 static int klsi_105_write_room (struct usb_serial_port *port) 594 { 595 unsigned long flags; 596 int i; 597 int room = 0; 598 struct klsi_105_private *priv = usb_get_serial_port_data(port); 599 600 spin_lock_irqsave (&priv->lock, flags); 601 for (i = 0; i < NUM_URBS; ++i) { 602 if (priv->write_urb_pool[i]->status != -EINPROGRESS) { 603 room += URB_TRANSFER_BUFFER_SIZE; 604 } 605 } 606 607 spin_unlock_irqrestore (&priv->lock, flags); 608 609 dbg("%s - returns %d", __FUNCTION__, room); 610 return (room); 611 } 612 613 614 615 static void klsi_105_read_bulk_callback (struct urb *urb) 616 { 617 struct usb_serial_port *port = (struct usb_serial_port *)urb->context; 618 struct klsi_105_private *priv = usb_get_serial_port_data(port); 619 struct tty_struct *tty; 620 unsigned char *data = urb->transfer_buffer; 621 int rc; 622 623 dbg("%s - port %d", __FUNCTION__, port->number); 624 625 /* The urb might have been killed. */ 626 if (urb->status) { 627 dbg("%s - nonzero read bulk status received: %d", __FUNCTION__, 628 urb->status); 629 return; 630 } 631 632 /* The data received is again preceded by a length double-byte in LSB- 633 * first order (see klsi_105_write() ) 634 */ 635 if (urb->actual_length == 0) { 636 /* empty urbs seem to happen, we ignore them */ 637 /* dbg("%s - emtpy URB", __FUNCTION__); */ 638 ; 639 } else if (urb->actual_length <= 2) { 640 dbg("%s - size %d URB not understood", __FUNCTION__, 641 urb->actual_length); 642 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, 643 urb->actual_length, data); 644 } else { 645 int bytes_sent = ((__u8 *) data)[0] + 646 ((unsigned int) ((__u8 *) data)[1] << 8); 647 tty = port->tty; 648 /* we should immediately resubmit the URB, before attempting 649 * to pass the data on to the tty layer. But that needs locking 650 * against re-entry an then mixed-up data because of 651 * intermixed tty_flip_buffer_push()s 652 * FIXME 653 */ 654 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, 655 urb->actual_length, data); 656 657 if (bytes_sent + 2 > urb->actual_length) { 658 dbg("%s - trying to read more data than available" 659 " (%d vs. %d)", __FUNCTION__, 660 bytes_sent+2, urb->actual_length); 661 /* cap at implied limit */ 662 bytes_sent = urb->actual_length - 2; 663 } 664 665 tty_buffer_request_room(tty, bytes_sent); 666 tty_insert_flip_string(tty, data + 2, bytes_sent); 667 tty_flip_buffer_push(tty); 668 669 /* again lockless, but debug info only */ 670 priv->bytes_in += bytes_sent; 671 } 672 /* Continue trying to always read */ 673 usb_fill_bulk_urb(port->read_urb, port->serial->dev, 674 usb_rcvbulkpipe(port->serial->dev, 675 port->bulk_in_endpointAddress), 676 port->read_urb->transfer_buffer, 677 port->read_urb->transfer_buffer_length, 678 klsi_105_read_bulk_callback, 679 port); 680 rc = usb_submit_urb(port->read_urb, GFP_ATOMIC); 681 if (rc) 682 err("%s - failed resubmitting read urb, error %d", __FUNCTION__, rc); 683 } /* klsi_105_read_bulk_callback */ 684 685 686 static void klsi_105_set_termios (struct usb_serial_port *port, 687 struct ktermios *old_termios) 688 { 689 struct klsi_105_private *priv = usb_get_serial_port_data(port); 690 unsigned int iflag = port->tty->termios->c_iflag; 691 unsigned int old_iflag = old_termios->c_iflag; 692 unsigned int cflag = port->tty->termios->c_cflag; 693 unsigned int old_cflag = old_termios->c_cflag; 694 struct klsi_105_port_settings cfg; 695 unsigned long flags; 696 697 /* lock while we are modifying the settings */ 698 spin_lock_irqsave (&priv->lock, flags); 699 700 /* 701 * Update baud rate 702 */ 703 if( (cflag & CBAUD) != (old_cflag & CBAUD) ) { 704 /* reassert DTR and (maybe) RTS on transition from B0 */ 705 if( (old_cflag & CBAUD) == B0 ) { 706 dbg("%s: baud was B0", __FUNCTION__); 707 #if 0 708 priv->control_state |= TIOCM_DTR; 709 /* don't set RTS if using hardware flow control */ 710 if (!(old_cflag & CRTSCTS)) { 711 priv->control_state |= TIOCM_RTS; 712 } 713 mct_u232_set_modem_ctrl(serial, priv->control_state); 714 #endif 715 } 716 717 switch(cflag & CBAUD) { 718 case B0: /* handled below */ 719 break; 720 case B1200: priv->cfg.baudrate = kl5kusb105a_sio_b1200; 721 break; 722 case B2400: priv->cfg.baudrate = kl5kusb105a_sio_b2400; 723 break; 724 case B4800: priv->cfg.baudrate = kl5kusb105a_sio_b4800; 725 break; 726 case B9600: priv->cfg.baudrate = kl5kusb105a_sio_b9600; 727 break; 728 case B19200: priv->cfg.baudrate = kl5kusb105a_sio_b19200; 729 break; 730 case B38400: priv->cfg.baudrate = kl5kusb105a_sio_b38400; 731 break; 732 case B57600: priv->cfg.baudrate = kl5kusb105a_sio_b57600; 733 break; 734 case B115200: priv->cfg.baudrate = kl5kusb105a_sio_b115200; 735 break; 736 default: 737 err("KLSI USB->Serial converter:" 738 " unsupported baudrate request, using default" 739 " of 9600"); 740 priv->cfg.baudrate = kl5kusb105a_sio_b9600; 741 break; 742 } 743 if ((cflag & CBAUD) == B0 ) { 744 dbg("%s: baud is B0", __FUNCTION__); 745 /* Drop RTS and DTR */ 746 /* maybe this should be simulated by sending read 747 * disable and read enable messages? 748 */ 749 ; 750 #if 0 751 priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS); 752 mct_u232_set_modem_ctrl(serial, priv->control_state); 753 #endif 754 } 755 } 756 757 if ((cflag & CSIZE) != (old_cflag & CSIZE)) { 758 /* set the number of data bits */ 759 switch (cflag & CSIZE) { 760 case CS5: 761 dbg("%s - 5 bits/byte not supported", __FUNCTION__); 762 spin_unlock_irqrestore (&priv->lock, flags); 763 return ; 764 case CS6: 765 dbg("%s - 6 bits/byte not supported", __FUNCTION__); 766 spin_unlock_irqrestore (&priv->lock, flags); 767 return ; 768 case CS7: 769 priv->cfg.databits = kl5kusb105a_dtb_7; 770 break; 771 case CS8: 772 priv->cfg.databits = kl5kusb105a_dtb_8; 773 break; 774 default: 775 err("CSIZE was not CS5-CS8, using default of 8"); 776 priv->cfg.databits = kl5kusb105a_dtb_8; 777 break; 778 } 779 } 780 781 /* 782 * Update line control register (LCR) 783 */ 784 if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD)) 785 || (cflag & CSTOPB) != (old_cflag & CSTOPB) ) { 786 787 #if 0 788 priv->last_lcr = 0; 789 790 /* set the parity */ 791 if (cflag & PARENB) 792 priv->last_lcr |= (cflag & PARODD) ? 793 MCT_U232_PARITY_ODD : MCT_U232_PARITY_EVEN; 794 else 795 priv->last_lcr |= MCT_U232_PARITY_NONE; 796 797 /* set the number of stop bits */ 798 priv->last_lcr |= (cflag & CSTOPB) ? 799 MCT_U232_STOP_BITS_2 : MCT_U232_STOP_BITS_1; 800 801 mct_u232_set_line_ctrl(serial, priv->last_lcr); 802 #endif 803 ; 804 } 805 806 /* 807 * Set flow control: well, I do not really now how to handle DTR/RTS. 808 * Just do what we have seen with SniffUSB on Win98. 809 */ 810 if( (iflag & IXOFF) != (old_iflag & IXOFF) 811 || (iflag & IXON) != (old_iflag & IXON) 812 || (cflag & CRTSCTS) != (old_cflag & CRTSCTS) ) { 813 814 /* Drop DTR/RTS if no flow control otherwise assert */ 815 #if 0 816 if ((iflag & IXOFF) || (iflag & IXON) || (cflag & CRTSCTS) ) 817 priv->control_state |= TIOCM_DTR | TIOCM_RTS; 818 else 819 priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS); 820 mct_u232_set_modem_ctrl(serial, priv->control_state); 821 #endif 822 ; 823 } 824 memcpy (&cfg, &priv->cfg, sizeof(cfg)); 825 spin_unlock_irqrestore (&priv->lock, flags); 826 827 /* now commit changes to device */ 828 klsi_105_chg_port_settings(port, &cfg); 829 } /* klsi_105_set_termios */ 830 831 832 #if 0 833 static void mct_u232_break_ctl( struct usb_serial_port *port, int break_state ) 834 { 835 struct usb_serial *serial = port->serial; 836 struct mct_u232_private *priv = (struct mct_u232_private *)port->private; 837 unsigned char lcr = priv->last_lcr; 838 839 dbg("%sstate=%d", __FUNCTION__, break_state); 840 841 if (break_state) 842 lcr |= MCT_U232_SET_BREAK; 843 844 mct_u232_set_line_ctrl(serial, lcr); 845 } /* mct_u232_break_ctl */ 846 #endif 847 848 static int klsi_105_tiocmget (struct usb_serial_port *port, struct file *file) 849 { 850 struct klsi_105_private *priv = usb_get_serial_port_data(port); 851 unsigned long flags; 852 int rc; 853 unsigned long line_state; 854 dbg("%s - request, just guessing", __FUNCTION__); 855 856 rc = klsi_105_get_line_state(port, &line_state); 857 if (rc < 0) { 858 err("Reading line control failed (error = %d)", rc); 859 /* better return value? EAGAIN? */ 860 return rc; 861 } 862 863 spin_lock_irqsave (&priv->lock, flags); 864 priv->line_state = line_state; 865 spin_unlock_irqrestore (&priv->lock, flags); 866 dbg("%s - read line state 0x%lx", __FUNCTION__, line_state); 867 return (int)line_state; 868 } 869 870 static int klsi_105_tiocmset (struct usb_serial_port *port, struct file *file, 871 unsigned int set, unsigned int clear) 872 { 873 int retval = -EINVAL; 874 875 dbg("%s", __FUNCTION__); 876 877 /* if this ever gets implemented, it should be done something like this: 878 struct usb_serial *serial = port->serial; 879 struct klsi_105_private *priv = usb_get_serial_port_data(port); 880 unsigned long flags; 881 int control; 882 883 spin_lock_irqsave (&priv->lock, flags); 884 if (set & TIOCM_RTS) 885 priv->control_state |= TIOCM_RTS; 886 if (set & TIOCM_DTR) 887 priv->control_state |= TIOCM_DTR; 888 if (clear & TIOCM_RTS) 889 priv->control_state &= ~TIOCM_RTS; 890 if (clear & TIOCM_DTR) 891 priv->control_state &= ~TIOCM_DTR; 892 control = priv->control_state; 893 spin_unlock_irqrestore (&priv->lock, flags); 894 retval = mct_u232_set_modem_ctrl(serial, control); 895 */ 896 return retval; 897 } 898 899 static void klsi_105_throttle (struct usb_serial_port *port) 900 { 901 dbg("%s - port %d", __FUNCTION__, port->number); 902 usb_kill_urb(port->read_urb); 903 } 904 905 static void klsi_105_unthrottle (struct usb_serial_port *port) 906 { 907 int result; 908 909 dbg("%s - port %d", __FUNCTION__, port->number); 910 911 port->read_urb->dev = port->serial->dev; 912 result = usb_submit_urb(port->read_urb, GFP_ATOMIC); 913 if (result) 914 err("%s - failed submitting read urb, error %d", __FUNCTION__, 915 result); 916 } 917 918 919 920 static int __init klsi_105_init (void) 921 { 922 int retval; 923 retval = usb_serial_register(&kl5kusb105d_device); 924 if (retval) 925 goto failed_usb_serial_register; 926 retval = usb_register(&kl5kusb105d_driver); 927 if (retval) 928 goto failed_usb_register; 929 930 info(DRIVER_DESC " " DRIVER_VERSION); 931 return 0; 932 failed_usb_register: 933 usb_serial_deregister(&kl5kusb105d_device); 934 failed_usb_serial_register: 935 return retval; 936 } 937 938 939 static void __exit klsi_105_exit (void) 940 { 941 usb_deregister (&kl5kusb105d_driver); 942 usb_serial_deregister (&kl5kusb105d_device); 943 } 944 945 946 module_init (klsi_105_init); 947 module_exit (klsi_105_exit); 948 949 MODULE_AUTHOR( DRIVER_AUTHOR ); 950 MODULE_DESCRIPTION( DRIVER_DESC ); 951 MODULE_LICENSE("GPL"); 952 953 954 module_param(debug, bool, S_IRUGO | S_IWUSR); 955 MODULE_PARM_DESC(debug, "enable extensive debugging messages"); 956 957 /* vim: set sts=8 ts=8 sw=8: */ 958