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/config.h> 49 #include <linux/kernel.h> 50 #include <linux/errno.h> 51 #include <linux/init.h> 52 #include <linux/slab.h> 53 #include <linux/tty.h> 54 #include <linux/tty_driver.h> 55 #include <linux/tty_flip.h> 56 #include <linux/module.h> 57 #include <asm/uaccess.h> 58 #include <linux/usb.h> 59 #include "usb-serial.h" 60 #include "kl5kusb105.h" 61 62 static int debug; 63 64 /* 65 * Version Information 66 */ 67 #define DRIVER_VERSION "v0.3a" 68 #define DRIVER_AUTHOR "Utz-Uwe Haus <haus@uuhaus.de>" 69 #define DRIVER_DESC "KLSI KL5KUSB105 chipset USB->Serial Converter driver" 70 71 72 /* 73 * Function prototypes 74 */ 75 static int klsi_105_startup (struct usb_serial *serial); 76 static void klsi_105_shutdown (struct usb_serial *serial); 77 static int klsi_105_open (struct usb_serial_port *port, 78 struct file *filp); 79 static void klsi_105_close (struct usb_serial_port *port, 80 struct file *filp); 81 static int klsi_105_write (struct usb_serial_port *port, 82 const unsigned char *buf, 83 int count); 84 static void klsi_105_write_bulk_callback (struct urb *urb, struct pt_regs *regs); 85 static int klsi_105_chars_in_buffer (struct usb_serial_port *port); 86 static int klsi_105_write_room (struct usb_serial_port *port); 87 88 static void klsi_105_read_bulk_callback (struct urb *urb, struct pt_regs *regs); 89 static void klsi_105_set_termios (struct usb_serial_port *port, 90 struct termios * old); 91 static int klsi_105_ioctl (struct usb_serial_port *port, 92 struct file * file, 93 unsigned int cmd, 94 unsigned long arg); 95 static void klsi_105_throttle (struct usb_serial_port *port); 96 static void klsi_105_unthrottle (struct usb_serial_port *port); 97 /* 98 static void klsi_105_break_ctl (struct usb_serial_port *port, 99 int break_state ); 100 */ 101 static int klsi_105_tiocmget (struct usb_serial_port *port, 102 struct file *file); 103 static int klsi_105_tiocmset (struct usb_serial_port *port, 104 struct file *file, unsigned int set, 105 unsigned int clear); 106 107 /* 108 * All of the device info needed for the KLSI converters. 109 */ 110 static struct usb_device_id id_table [] = { 111 { USB_DEVICE(PALMCONNECT_VID, PALMCONNECT_PID) }, 112 { USB_DEVICE(KLSI_VID, KLSI_KL5KUSB105D_PID) }, 113 { } /* Terminating entry */ 114 }; 115 116 MODULE_DEVICE_TABLE (usb, id_table); 117 118 static struct usb_driver kl5kusb105d_driver = { 119 .name = "kl5kusb105d", 120 .probe = usb_serial_probe, 121 .disconnect = usb_serial_disconnect, 122 .id_table = id_table, 123 .no_dynamic_id = 1, 124 }; 125 126 static struct usb_serial_driver kl5kusb105d_device = { 127 .driver = { 128 .owner = THIS_MODULE, 129 .name = "kl5kusb105d", 130 }, 131 .description = "KL5KUSB105D / PalmConnect", 132 .id_table = id_table, 133 .num_interrupt_in = 1, 134 .num_bulk_in = 1, 135 .num_bulk_out = 1, 136 .num_ports = 1, 137 .open = klsi_105_open, 138 .close = klsi_105_close, 139 .write = klsi_105_write, 140 .write_bulk_callback = klsi_105_write_bulk_callback, 141 .chars_in_buffer = klsi_105_chars_in_buffer, 142 .write_room = klsi_105_write_room, 143 .read_bulk_callback =klsi_105_read_bulk_callback, 144 .ioctl = klsi_105_ioctl, 145 .set_termios = klsi_105_set_termios, 146 /*.break_ctl = klsi_105_break_ctl,*/ 147 .tiocmget = klsi_105_tiocmget, 148 .tiocmset = klsi_105_tiocmset, 149 .attach = klsi_105_startup, 150 .shutdown = klsi_105_shutdown, 151 .throttle = klsi_105_throttle, 152 .unthrottle = klsi_105_unthrottle, 153 }; 154 155 struct klsi_105_port_settings { 156 __u8 pktlen; /* always 5, it seems */ 157 __u8 baudrate; 158 __u8 databits; 159 __u8 unknown1; 160 __u8 unknown2; 161 } __attribute__ ((packed)); 162 163 /* we implement a pool of NUM_URBS urbs per usb_serial */ 164 #define NUM_URBS 1 165 #define URB_TRANSFER_BUFFER_SIZE 64 166 struct klsi_105_private { 167 struct klsi_105_port_settings cfg; 168 struct termios termios; 169 unsigned long line_state; /* modem line settings */ 170 /* write pool */ 171 struct urb * write_urb_pool[NUM_URBS]; 172 spinlock_t lock; 173 unsigned long bytes_in; 174 unsigned long bytes_out; 175 }; 176 177 178 /* 179 * Handle vendor specific USB requests 180 */ 181 182 183 #define KLSI_TIMEOUT 5000 /* default urb timeout */ 184 185 static int klsi_105_chg_port_settings(struct usb_serial_port *port, 186 struct klsi_105_port_settings *settings) 187 { 188 int rc; 189 190 rc = usb_control_msg(port->serial->dev, 191 usb_sndctrlpipe(port->serial->dev, 0), 192 KL5KUSB105A_SIO_SET_DATA, 193 USB_TYPE_VENDOR | USB_DIR_OUT | USB_RECIP_INTERFACE, 194 0, /* value */ 195 0, /* index */ 196 settings, 197 sizeof(struct klsi_105_port_settings), 198 KLSI_TIMEOUT); 199 if (rc < 0) 200 err("Change port settings failed (error = %d)", rc); 201 info("%s - %d byte block, baudrate %x, databits %d, u1 %d, u2 %d", 202 __FUNCTION__, 203 settings->pktlen, 204 settings->baudrate, settings->databits, 205 settings->unknown1, settings->unknown2); 206 return rc; 207 } /* klsi_105_chg_port_settings */ 208 209 /* translate a 16-bit status value from the device to linux's TIO bits */ 210 static unsigned long klsi_105_status2linestate(const __u16 status) 211 { 212 unsigned long res = 0; 213 214 res = ((status & KL5KUSB105A_DSR) ? TIOCM_DSR : 0) 215 | ((status & KL5KUSB105A_CTS) ? TIOCM_CTS : 0) 216 ; 217 218 return res; 219 } 220 /* 221 * Read line control via vendor command and return result through 222 * *line_state_p 223 */ 224 /* It seems that the status buffer has always only 2 bytes length */ 225 #define KLSI_STATUSBUF_LEN 2 226 static int klsi_105_get_line_state(struct usb_serial_port *port, 227 unsigned long *line_state_p) 228 { 229 int rc; 230 __u8 status_buf[KLSI_STATUSBUF_LEN] = { -1,-1}; 231 __u16 status; 232 233 info("%s - sending SIO Poll request", __FUNCTION__); 234 rc = usb_control_msg(port->serial->dev, 235 usb_rcvctrlpipe(port->serial->dev, 0), 236 KL5KUSB105A_SIO_POLL, 237 USB_TYPE_VENDOR | USB_DIR_IN, 238 0, /* value */ 239 0, /* index */ 240 status_buf, KLSI_STATUSBUF_LEN, 241 10000 242 ); 243 if (rc < 0) 244 err("Reading line status failed (error = %d)", rc); 245 else { 246 status = status_buf[0] + (status_buf[1]<<8); 247 248 info("%s - read status %x %x", __FUNCTION__, 249 status_buf[0], status_buf[1]); 250 251 *line_state_p = klsi_105_status2linestate(status); 252 } 253 254 return rc; 255 } 256 257 258 /* 259 * Driver's tty interface functions 260 */ 261 262 static int klsi_105_startup (struct usb_serial *serial) 263 { 264 struct klsi_105_private *priv; 265 int i; 266 267 /* check if we support the product id (see keyspan.c) 268 * FIXME 269 */ 270 271 /* allocate the private data structure */ 272 for (i=0; i<serial->num_ports; i++) { 273 int j; 274 priv = kmalloc(sizeof(struct klsi_105_private), 275 GFP_KERNEL); 276 if (!priv) { 277 dbg("%skmalloc for klsi_105_private failed.", __FUNCTION__); 278 return -ENOMEM; 279 } 280 /* set initial values for control structures */ 281 priv->cfg.pktlen = 5; 282 priv->cfg.baudrate = kl5kusb105a_sio_b9600; 283 priv->cfg.databits = kl5kusb105a_dtb_8; 284 priv->cfg.unknown1 = 0; 285 priv->cfg.unknown2 = 1; 286 287 priv->line_state = 0; 288 289 priv->bytes_in = 0; 290 priv->bytes_out = 0; 291 usb_set_serial_port_data(serial->port[i], priv); 292 293 spin_lock_init (&priv->lock); 294 for (j=0; j<NUM_URBS; j++) { 295 struct urb* urb = usb_alloc_urb(0, GFP_KERNEL); 296 297 priv->write_urb_pool[j] = urb; 298 if (urb == NULL) { 299 err("No more urbs???"); 300 continue; 301 } 302 303 urb->transfer_buffer = NULL; 304 urb->transfer_buffer = kmalloc (URB_TRANSFER_BUFFER_SIZE, 305 GFP_KERNEL); 306 if (!urb->transfer_buffer) { 307 err("%s - out of memory for urb buffers.", __FUNCTION__); 308 continue; 309 } 310 } 311 312 /* priv->termios is left uninitalized until port opening */ 313 init_waitqueue_head(&serial->port[i]->write_wait); 314 } 315 316 return (0); 317 } /* klsi_105_startup */ 318 319 320 static void klsi_105_shutdown (struct usb_serial *serial) 321 { 322 int i; 323 324 dbg("%s", __FUNCTION__); 325 326 /* stop reads and writes on all ports */ 327 for (i=0; i < serial->num_ports; ++i) { 328 struct klsi_105_private *priv = usb_get_serial_port_data(serial->port[i]); 329 unsigned long flags; 330 331 if (priv) { 332 /* kill our write urb pool */ 333 int j; 334 struct urb **write_urbs = priv->write_urb_pool; 335 spin_lock_irqsave(&priv->lock,flags); 336 337 for (j = 0; j < NUM_URBS; j++) { 338 if (write_urbs[j]) { 339 /* FIXME - uncomment the following 340 * usb_kill_urb call when the host 341 * controllers get fixed to set 342 * urb->dev = NULL after the urb is 343 * finished. Otherwise this call 344 * oopses. */ 345 /* usb_kill_urb(write_urbs[j]); */ 346 kfree(write_urbs[j]->transfer_buffer); 347 usb_free_urb (write_urbs[j]); 348 } 349 } 350 351 spin_unlock_irqrestore (&priv->lock, flags); 352 353 kfree(priv); 354 usb_set_serial_port_data(serial->port[i], NULL); 355 } 356 } 357 } /* klsi_105_shutdown */ 358 359 static int klsi_105_open (struct usb_serial_port *port, struct file *filp) 360 { 361 struct klsi_105_private *priv = usb_get_serial_port_data(port); 362 int retval = 0; 363 int rc; 364 int i; 365 unsigned long line_state; 366 struct klsi_105_port_settings cfg; 367 unsigned long flags; 368 369 dbg("%s port %d", __FUNCTION__, port->number); 370 371 /* force low_latency on so that our tty_push actually forces 372 * the data through 373 * port->tty->low_latency = 1; */ 374 375 /* Do a defined restart: 376 * Set up sane default baud rate and send the 'READ_ON' 377 * vendor command. 378 * FIXME: set modem line control (how?) 379 * Then read the modem line control and store values in 380 * priv->line_state. 381 */ 382 cfg.pktlen = 5; 383 cfg.baudrate = kl5kusb105a_sio_b9600; 384 cfg.databits = kl5kusb105a_dtb_8; 385 cfg.unknown1 = 0; 386 cfg.unknown2 = 1; 387 klsi_105_chg_port_settings(port, &cfg); 388 389 /* set up termios structure */ 390 spin_lock_irqsave (&priv->lock, flags); 391 priv->termios.c_iflag = port->tty->termios->c_iflag; 392 priv->termios.c_oflag = port->tty->termios->c_oflag; 393 priv->termios.c_cflag = port->tty->termios->c_cflag; 394 priv->termios.c_lflag = port->tty->termios->c_lflag; 395 for (i=0; i<NCCS; i++) 396 priv->termios.c_cc[i] = port->tty->termios->c_cc[i]; 397 priv->cfg.pktlen = cfg.pktlen; 398 priv->cfg.baudrate = cfg.baudrate; 399 priv->cfg.databits = cfg.databits; 400 priv->cfg.unknown1 = cfg.unknown1; 401 priv->cfg.unknown2 = cfg.unknown2; 402 spin_unlock_irqrestore (&priv->lock, flags); 403 404 /* READ_ON and urb submission */ 405 usb_fill_bulk_urb(port->read_urb, port->serial->dev, 406 usb_rcvbulkpipe(port->serial->dev, 407 port->bulk_in_endpointAddress), 408 port->read_urb->transfer_buffer, 409 port->read_urb->transfer_buffer_length, 410 klsi_105_read_bulk_callback, 411 port); 412 413 rc = usb_submit_urb(port->read_urb, GFP_KERNEL); 414 if (rc) { 415 err("%s - failed submitting read urb, error %d", __FUNCTION__, rc); 416 retval = rc; 417 goto exit; 418 } 419 420 rc = usb_control_msg(port->serial->dev, 421 usb_sndctrlpipe(port->serial->dev,0), 422 KL5KUSB105A_SIO_CONFIGURE, 423 USB_TYPE_VENDOR|USB_DIR_OUT|USB_RECIP_INTERFACE, 424 KL5KUSB105A_SIO_CONFIGURE_READ_ON, 425 0, /* index */ 426 NULL, 427 0, 428 KLSI_TIMEOUT); 429 if (rc < 0) { 430 err("Enabling read failed (error = %d)", rc); 431 retval = rc; 432 } else 433 dbg("%s - enabled reading", __FUNCTION__); 434 435 rc = klsi_105_get_line_state(port, &line_state); 436 if (rc >= 0) { 437 spin_lock_irqsave (&priv->lock, flags); 438 priv->line_state = line_state; 439 spin_unlock_irqrestore (&priv->lock, flags); 440 dbg("%s - read line state 0x%lx", __FUNCTION__, line_state); 441 retval = 0; 442 } else 443 retval = rc; 444 445 exit: 446 return retval; 447 } /* klsi_105_open */ 448 449 450 static void klsi_105_close (struct usb_serial_port *port, struct file *filp) 451 { 452 struct klsi_105_private *priv = usb_get_serial_port_data(port); 453 int rc; 454 455 dbg("%s port %d", __FUNCTION__, port->number); 456 457 /* send READ_OFF */ 458 rc = usb_control_msg (port->serial->dev, 459 usb_sndctrlpipe(port->serial->dev, 0), 460 KL5KUSB105A_SIO_CONFIGURE, 461 USB_TYPE_VENDOR | USB_DIR_OUT, 462 KL5KUSB105A_SIO_CONFIGURE_READ_OFF, 463 0, /* index */ 464 NULL, 0, 465 KLSI_TIMEOUT); 466 if (rc < 0) 467 err("Disabling read failed (error = %d)", rc); 468 469 /* shutdown our bulk reads and writes */ 470 usb_kill_urb(port->write_urb); 471 usb_kill_urb(port->read_urb); 472 /* unlink our write pool */ 473 /* FIXME */ 474 /* wgg - do I need this? I think so. */ 475 usb_kill_urb(port->interrupt_in_urb); 476 info("kl5kusb105 port stats: %ld bytes in, %ld bytes out", priv->bytes_in, priv->bytes_out); 477 } /* klsi_105_close */ 478 479 480 /* We need to write a complete 64-byte data block and encode the 481 * number actually sent in the first double-byte, LSB-order. That 482 * leaves at most 62 bytes of payload. 483 */ 484 #define KLSI_105_DATA_OFFSET 2 /* in the bulk urb data block */ 485 486 487 static int klsi_105_write (struct usb_serial_port *port, 488 const unsigned char *buf, int count) 489 { 490 struct klsi_105_private *priv = usb_get_serial_port_data(port); 491 int result, size; 492 int bytes_sent=0; 493 494 dbg("%s - port %d", __FUNCTION__, port->number); 495 496 while (count > 0) { 497 /* try to find a free urb (write 0 bytes if none) */ 498 struct urb *urb = NULL; 499 unsigned long flags; 500 int i; 501 /* since the pool is per-port we might not need the spin lock !? */ 502 spin_lock_irqsave (&priv->lock, flags); 503 for (i=0; i<NUM_URBS; i++) { 504 if (priv->write_urb_pool[i]->status != -EINPROGRESS) { 505 urb = priv->write_urb_pool[i]; 506 dbg("%s - using pool URB %d", __FUNCTION__, i); 507 break; 508 } 509 } 510 spin_unlock_irqrestore (&priv->lock, flags); 511 512 if (urb==NULL) { 513 dbg("%s - no more free urbs", __FUNCTION__); 514 goto exit; 515 } 516 517 if (urb->transfer_buffer == NULL) { 518 urb->transfer_buffer = kmalloc (URB_TRANSFER_BUFFER_SIZE, GFP_ATOMIC); 519 if (urb->transfer_buffer == NULL) { 520 err("%s - no more kernel memory...", __FUNCTION__); 521 goto exit; 522 } 523 } 524 525 size = min (count, port->bulk_out_size - KLSI_105_DATA_OFFSET); 526 size = min (size, URB_TRANSFER_BUFFER_SIZE - KLSI_105_DATA_OFFSET); 527 528 memcpy (urb->transfer_buffer + KLSI_105_DATA_OFFSET, buf, size); 529 530 /* write payload size into transfer buffer */ 531 ((__u8 *)urb->transfer_buffer)[0] = (__u8) (size & 0xFF); 532 ((__u8 *)urb->transfer_buffer)[1] = (__u8) ((size & 0xFF00)>>8); 533 534 /* set up our urb */ 535 usb_fill_bulk_urb(urb, port->serial->dev, 536 usb_sndbulkpipe(port->serial->dev, 537 port->bulk_out_endpointAddress), 538 urb->transfer_buffer, 539 URB_TRANSFER_BUFFER_SIZE, 540 klsi_105_write_bulk_callback, 541 port); 542 543 /* send the data out the bulk port */ 544 result = usb_submit_urb(urb, GFP_ATOMIC); 545 if (result) { 546 err("%s - failed submitting write urb, error %d", __FUNCTION__, result); 547 goto exit; 548 } 549 buf += size; 550 bytes_sent += size; 551 count -= size; 552 } 553 exit: 554 /* lockless, but it's for debug info only... */ 555 priv->bytes_out+=bytes_sent; 556 557 return bytes_sent; /* that's how much we wrote */ 558 } /* klsi_105_write */ 559 560 static void klsi_105_write_bulk_callback ( struct urb *urb, struct pt_regs *regs) 561 { 562 struct usb_serial_port *port = (struct usb_serial_port *)urb->context; 563 564 dbg("%s - port %d", __FUNCTION__, port->number); 565 566 if (urb->status) { 567 dbg("%s - nonzero write bulk status received: %d", __FUNCTION__, 568 urb->status); 569 return; 570 } 571 572 usb_serial_port_softint(port); 573 } /* klsi_105_write_bulk_completion_callback */ 574 575 576 /* return number of characters currently in the writing process */ 577 static int klsi_105_chars_in_buffer (struct usb_serial_port *port) 578 { 579 int chars = 0; 580 int i; 581 unsigned long flags; 582 struct klsi_105_private *priv = usb_get_serial_port_data(port); 583 584 spin_lock_irqsave (&priv->lock, flags); 585 586 for (i = 0; i < NUM_URBS; ++i) { 587 if (priv->write_urb_pool[i]->status == -EINPROGRESS) { 588 chars += URB_TRANSFER_BUFFER_SIZE; 589 } 590 } 591 592 spin_unlock_irqrestore (&priv->lock, flags); 593 594 dbg("%s - returns %d", __FUNCTION__, chars); 595 return (chars); 596 } 597 598 static int klsi_105_write_room (struct usb_serial_port *port) 599 { 600 unsigned long flags; 601 int i; 602 int room = 0; 603 struct klsi_105_private *priv = usb_get_serial_port_data(port); 604 605 spin_lock_irqsave (&priv->lock, flags); 606 for (i = 0; i < NUM_URBS; ++i) { 607 if (priv->write_urb_pool[i]->status != -EINPROGRESS) { 608 room += URB_TRANSFER_BUFFER_SIZE; 609 } 610 } 611 612 spin_unlock_irqrestore (&priv->lock, flags); 613 614 dbg("%s - returns %d", __FUNCTION__, room); 615 return (room); 616 } 617 618 619 620 static void klsi_105_read_bulk_callback (struct urb *urb, struct pt_regs *regs) 621 { 622 struct usb_serial_port *port = (struct usb_serial_port *)urb->context; 623 struct klsi_105_private *priv = usb_get_serial_port_data(port); 624 struct tty_struct *tty; 625 unsigned char *data = urb->transfer_buffer; 626 int rc; 627 628 dbg("%s - port %d", __FUNCTION__, port->number); 629 630 /* The urb might have been killed. */ 631 if (urb->status) { 632 dbg("%s - nonzero read bulk status received: %d", __FUNCTION__, 633 urb->status); 634 return; 635 } 636 637 /* The data received is again preceded by a length double-byte in LSB- 638 * first order (see klsi_105_write() ) 639 */ 640 if (urb->actual_length == 0) { 641 /* empty urbs seem to happen, we ignore them */ 642 /* dbg("%s - emtpy URB", __FUNCTION__); */ 643 ; 644 } else if (urb->actual_length <= 2) { 645 dbg("%s - size %d URB not understood", __FUNCTION__, 646 urb->actual_length); 647 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, 648 urb->actual_length, data); 649 } else { 650 int bytes_sent = ((__u8 *) data)[0] + 651 ((unsigned int) ((__u8 *) data)[1] << 8); 652 tty = port->tty; 653 /* we should immediately resubmit the URB, before attempting 654 * to pass the data on to the tty layer. But that needs locking 655 * against re-entry an then mixed-up data because of 656 * intermixed tty_flip_buffer_push()s 657 * FIXME 658 */ 659 usb_serial_debug_data(debug, &port->dev, __FUNCTION__, 660 urb->actual_length, data); 661 662 if (bytes_sent + 2 > urb->actual_length) { 663 dbg("%s - trying to read more data than available" 664 " (%d vs. %d)", __FUNCTION__, 665 bytes_sent+2, urb->actual_length); 666 /* cap at implied limit */ 667 bytes_sent = urb->actual_length - 2; 668 } 669 670 tty_buffer_request_room(tty, bytes_sent); 671 tty_insert_flip_string(tty, data + 2, bytes_sent); 672 tty_flip_buffer_push(tty); 673 674 /* again lockless, but debug info only */ 675 priv->bytes_in += bytes_sent; 676 } 677 /* Continue trying to always read */ 678 usb_fill_bulk_urb(port->read_urb, port->serial->dev, 679 usb_rcvbulkpipe(port->serial->dev, 680 port->bulk_in_endpointAddress), 681 port->read_urb->transfer_buffer, 682 port->read_urb->transfer_buffer_length, 683 klsi_105_read_bulk_callback, 684 port); 685 rc = usb_submit_urb(port->read_urb, GFP_ATOMIC); 686 if (rc) 687 err("%s - failed resubmitting read urb, error %d", __FUNCTION__, rc); 688 } /* klsi_105_read_bulk_callback */ 689 690 691 static void klsi_105_set_termios (struct usb_serial_port *port, 692 struct termios *old_termios) 693 { 694 struct klsi_105_private *priv = usb_get_serial_port_data(port); 695 unsigned int iflag = port->tty->termios->c_iflag; 696 unsigned int old_iflag = old_termios->c_iflag; 697 unsigned int cflag = port->tty->termios->c_cflag; 698 unsigned int old_cflag = old_termios->c_cflag; 699 struct klsi_105_port_settings cfg; 700 unsigned long flags; 701 702 /* lock while we are modifying the settings */ 703 spin_lock_irqsave (&priv->lock, flags); 704 705 /* 706 * Update baud rate 707 */ 708 if( (cflag & CBAUD) != (old_cflag & CBAUD) ) { 709 /* reassert DTR and (maybe) RTS on transition from B0 */ 710 if( (old_cflag & CBAUD) == B0 ) { 711 dbg("%s: baud was B0", __FUNCTION__); 712 #if 0 713 priv->control_state |= TIOCM_DTR; 714 /* don't set RTS if using hardware flow control */ 715 if (!(old_cflag & CRTSCTS)) { 716 priv->control_state |= TIOCM_RTS; 717 } 718 mct_u232_set_modem_ctrl(serial, priv->control_state); 719 #endif 720 } 721 722 switch(cflag & CBAUD) { 723 case B0: /* handled below */ 724 break; 725 case B1200: priv->cfg.baudrate = kl5kusb105a_sio_b1200; 726 break; 727 case B2400: priv->cfg.baudrate = kl5kusb105a_sio_b2400; 728 break; 729 case B4800: priv->cfg.baudrate = kl5kusb105a_sio_b4800; 730 break; 731 case B9600: priv->cfg.baudrate = kl5kusb105a_sio_b9600; 732 break; 733 case B19200: priv->cfg.baudrate = kl5kusb105a_sio_b19200; 734 break; 735 case B38400: priv->cfg.baudrate = kl5kusb105a_sio_b38400; 736 break; 737 case B57600: priv->cfg.baudrate = kl5kusb105a_sio_b57600; 738 break; 739 case B115200: priv->cfg.baudrate = kl5kusb105a_sio_b115200; 740 break; 741 default: 742 err("KLSI USB->Serial converter:" 743 " unsupported baudrate request, using default" 744 " of 9600"); 745 priv->cfg.baudrate = kl5kusb105a_sio_b9600; 746 break; 747 } 748 if ((cflag & CBAUD) == B0 ) { 749 dbg("%s: baud is B0", __FUNCTION__); 750 /* Drop RTS and DTR */ 751 /* maybe this should be simulated by sending read 752 * disable and read enable messages? 753 */ 754 ; 755 #if 0 756 priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS); 757 mct_u232_set_modem_ctrl(serial, priv->control_state); 758 #endif 759 } 760 } 761 762 if ((cflag & CSIZE) != (old_cflag & CSIZE)) { 763 /* set the number of data bits */ 764 switch (cflag & CSIZE) { 765 case CS5: 766 dbg("%s - 5 bits/byte not supported", __FUNCTION__); 767 spin_unlock_irqrestore (&priv->lock, flags); 768 return ; 769 case CS6: 770 dbg("%s - 6 bits/byte not supported", __FUNCTION__); 771 spin_unlock_irqrestore (&priv->lock, flags); 772 return ; 773 case CS7: 774 priv->cfg.databits = kl5kusb105a_dtb_7; 775 break; 776 case CS8: 777 priv->cfg.databits = kl5kusb105a_dtb_8; 778 break; 779 default: 780 err("CSIZE was not CS5-CS8, using default of 8"); 781 priv->cfg.databits = kl5kusb105a_dtb_8; 782 break; 783 } 784 } 785 786 /* 787 * Update line control register (LCR) 788 */ 789 if ((cflag & (PARENB|PARODD)) != (old_cflag & (PARENB|PARODD)) 790 || (cflag & CSTOPB) != (old_cflag & CSTOPB) ) { 791 792 #if 0 793 priv->last_lcr = 0; 794 795 /* set the parity */ 796 if (cflag & PARENB) 797 priv->last_lcr |= (cflag & PARODD) ? 798 MCT_U232_PARITY_ODD : MCT_U232_PARITY_EVEN; 799 else 800 priv->last_lcr |= MCT_U232_PARITY_NONE; 801 802 /* set the number of stop bits */ 803 priv->last_lcr |= (cflag & CSTOPB) ? 804 MCT_U232_STOP_BITS_2 : MCT_U232_STOP_BITS_1; 805 806 mct_u232_set_line_ctrl(serial, priv->last_lcr); 807 #endif 808 ; 809 } 810 811 /* 812 * Set flow control: well, I do not really now how to handle DTR/RTS. 813 * Just do what we have seen with SniffUSB on Win98. 814 */ 815 if( (iflag & IXOFF) != (old_iflag & IXOFF) 816 || (iflag & IXON) != (old_iflag & IXON) 817 || (cflag & CRTSCTS) != (old_cflag & CRTSCTS) ) { 818 819 /* Drop DTR/RTS if no flow control otherwise assert */ 820 #if 0 821 if ((iflag & IXOFF) || (iflag & IXON) || (cflag & CRTSCTS) ) 822 priv->control_state |= TIOCM_DTR | TIOCM_RTS; 823 else 824 priv->control_state &= ~(TIOCM_DTR | TIOCM_RTS); 825 mct_u232_set_modem_ctrl(serial, priv->control_state); 826 #endif 827 ; 828 } 829 memcpy (&cfg, &priv->cfg, sizeof(cfg)); 830 spin_unlock_irqrestore (&priv->lock, flags); 831 832 /* now commit changes to device */ 833 klsi_105_chg_port_settings(port, &cfg); 834 } /* klsi_105_set_termios */ 835 836 837 #if 0 838 static void mct_u232_break_ctl( struct usb_serial_port *port, int break_state ) 839 { 840 struct usb_serial *serial = port->serial; 841 struct mct_u232_private *priv = (struct mct_u232_private *)port->private; 842 unsigned char lcr = priv->last_lcr; 843 844 dbg("%sstate=%d", __FUNCTION__, break_state); 845 846 if (break_state) 847 lcr |= MCT_U232_SET_BREAK; 848 849 mct_u232_set_line_ctrl(serial, lcr); 850 } /* mct_u232_break_ctl */ 851 #endif 852 853 static int klsi_105_tiocmget (struct usb_serial_port *port, struct file *file) 854 { 855 struct klsi_105_private *priv = usb_get_serial_port_data(port); 856 unsigned long flags; 857 int rc; 858 unsigned long line_state; 859 dbg("%s - request, just guessing", __FUNCTION__); 860 861 rc = klsi_105_get_line_state(port, &line_state); 862 if (rc < 0) { 863 err("Reading line control failed (error = %d)", rc); 864 /* better return value? EAGAIN? */ 865 return rc; 866 } 867 868 spin_lock_irqsave (&priv->lock, flags); 869 priv->line_state = line_state; 870 spin_unlock_irqrestore (&priv->lock, flags); 871 dbg("%s - read line state 0x%lx", __FUNCTION__, line_state); 872 return (int)line_state; 873 } 874 875 static int klsi_105_tiocmset (struct usb_serial_port *port, struct file *file, 876 unsigned int set, unsigned int clear) 877 { 878 int retval = -EINVAL; 879 880 dbg("%s", __FUNCTION__); 881 882 /* if this ever gets implemented, it should be done something like this: 883 struct usb_serial *serial = port->serial; 884 struct klsi_105_private *priv = usb_get_serial_port_data(port); 885 unsigned long flags; 886 int control; 887 888 spin_lock_irqsave (&priv->lock, flags); 889 if (set & TIOCM_RTS) 890 priv->control_state |= TIOCM_RTS; 891 if (set & TIOCM_DTR) 892 priv->control_state |= TIOCM_DTR; 893 if (clear & TIOCM_RTS) 894 priv->control_state &= ~TIOCM_RTS; 895 if (clear & TIOCM_DTR) 896 priv->control_state &= ~TIOCM_DTR; 897 control = priv->control_state; 898 spin_unlock_irqrestore (&priv->lock, flags); 899 retval = mct_u232_set_modem_ctrl(serial, control); 900 */ 901 return retval; 902 } 903 904 static int klsi_105_ioctl (struct usb_serial_port *port, struct file * file, 905 unsigned int cmd, unsigned long arg) 906 { 907 struct klsi_105_private *priv = usb_get_serial_port_data(port); 908 void __user *user_arg = (void __user *)arg; 909 910 dbg("%scmd=0x%x", __FUNCTION__, cmd); 911 912 /* Based on code from acm.c and others */ 913 switch (cmd) { 914 case TIOCMIWAIT: 915 /* wait for any of the 4 modem inputs (DCD,RI,DSR,CTS)*/ 916 /* TODO */ 917 dbg("%s - TIOCMIWAIT not handled", __FUNCTION__); 918 return -ENOIOCTLCMD; 919 case TIOCGICOUNT: 920 /* return count of modemline transitions */ 921 /* TODO */ 922 dbg("%s - TIOCGICOUNT not handled", __FUNCTION__); 923 return -ENOIOCTLCMD; 924 case TCGETS: 925 /* return current info to caller */ 926 dbg("%s - TCGETS data faked/incomplete", __FUNCTION__); 927 928 if (!access_ok(VERIFY_WRITE, user_arg, sizeof(struct termios))) 929 return -EFAULT; 930 931 if (kernel_termios_to_user_termios((struct termios __user *)arg, 932 &priv->termios)) 933 return -EFAULT; 934 return 0; 935 case TCSETS: 936 /* set port termios to the one given by the user */ 937 dbg("%s - TCSETS not handled", __FUNCTION__); 938 939 if (!access_ok(VERIFY_READ, user_arg, sizeof(struct termios))) 940 return -EFAULT; 941 942 if (user_termios_to_kernel_termios(&priv->termios, 943 (struct termios __user *)arg)) 944 return -EFAULT; 945 klsi_105_set_termios(port, &priv->termios); 946 return 0; 947 case TCSETSW: { 948 /* set port termios and try to wait for completion of last 949 * write operation */ 950 /* We guess here. If there are not too many write urbs 951 * outstanding, we lie. */ 952 /* what is the right way to wait here? schedule() ? */ 953 /* 954 while (klsi_105_chars_in_buffer(port) > (NUM_URBS / 4 ) * URB_TRANSFER_BUFFER_SIZE) 955 schedule(); 956 */ 957 return -ENOIOCTLCMD; 958 } 959 default: 960 dbg("%s: arg not supported - 0x%04x", __FUNCTION__,cmd); 961 return(-ENOIOCTLCMD); 962 break; 963 } 964 return 0; 965 } /* klsi_105_ioctl */ 966 967 static void klsi_105_throttle (struct usb_serial_port *port) 968 { 969 dbg("%s - port %d", __FUNCTION__, port->number); 970 usb_kill_urb(port->read_urb); 971 } 972 973 static void klsi_105_unthrottle (struct usb_serial_port *port) 974 { 975 int result; 976 977 dbg("%s - port %d", __FUNCTION__, port->number); 978 979 port->read_urb->dev = port->serial->dev; 980 result = usb_submit_urb(port->read_urb, GFP_ATOMIC); 981 if (result) 982 err("%s - failed submitting read urb, error %d", __FUNCTION__, 983 result); 984 } 985 986 987 988 static int __init klsi_105_init (void) 989 { 990 int retval; 991 retval = usb_serial_register(&kl5kusb105d_device); 992 if (retval) 993 goto failed_usb_serial_register; 994 retval = usb_register(&kl5kusb105d_driver); 995 if (retval) 996 goto failed_usb_register; 997 998 info(DRIVER_DESC " " DRIVER_VERSION); 999 return 0; 1000 failed_usb_register: 1001 usb_serial_deregister(&kl5kusb105d_device); 1002 failed_usb_serial_register: 1003 return retval; 1004 } 1005 1006 1007 static void __exit klsi_105_exit (void) 1008 { 1009 usb_deregister (&kl5kusb105d_driver); 1010 usb_serial_deregister (&kl5kusb105d_device); 1011 } 1012 1013 1014 module_init (klsi_105_init); 1015 module_exit (klsi_105_exit); 1016 1017 MODULE_AUTHOR( DRIVER_AUTHOR ); 1018 MODULE_DESCRIPTION( DRIVER_DESC ); 1019 MODULE_LICENSE("GPL"); 1020 1021 1022 module_param(debug, bool, S_IRUGO | S_IWUSR); 1023 MODULE_PARM_DESC(debug, "enable extensive debugging messages"); 1024 1025 /* vim: set sts=8 ts=8 sw=8: */ 1026