kernel/drivers/usb/serial/keyspan_pda.c

   1 /*
   2  * USB Keyspan PDA / Xircom / Entrega Converter driver
   3  *
   4  * Copyright (C) 1999 - 2001 Greg Kroah-Hartman <greg@kroah.com>
   5  * Copyright (C) 1999, 2000 Brian Warner        <warner@lothar.com>
   6  * Copyright (C) 2000 Al Borchers               <borchers@steinerpoint.com>
   7  *
   8  *      This program is free software; you can redistribute it and/or modify
   9  *      it under the terms of the GNU General Public License as published by
  10  *      the Free Software Foundation; either version 2 of the License, or
  11  *      (at your option) any later version.
  12  *
  13  * See Documentation/usb/usb-serial.txt for more information on using this
  14  * driver
  15  */
  16
  17
  18 #include <linux/kernel.h>
  19 #include <linux/errno.h>
  20 #include <linux/slab.h>
  21 #include <linux/tty.h>
  22 #include <linux/tty_driver.h>
  23 #include <linux/tty_flip.h>
  24 #include <linux/module.h>
  25 #include <linux/spinlock.h>
  26 #include <linux/workqueue.h>
  27 #include <linux/uaccess.h>
  28 #include <linux/usb.h>
  29 #include <linux/usb/serial.h>
  30 #include <linux/usb/ezusb.h>
  31
  32 /* make a simple define to handle if we are compiling keyspan_pda or xircom support */
  33 #if defined(CONFIG_USB_SERIAL_KEYSPAN_PDA) || defined(CONFIG_USB_SERIAL_KEYSPAN_PDA_MODULE)
  34         #define KEYSPAN
  35 #else
  36         #undef KEYSPAN
  37 #endif
  38 #if defined(CONFIG_USB_SERIAL_XIRCOM) || defined(CONFIG_USB_SERIAL_XIRCOM_MODULE)
  39         #define XIRCOM
  40 #else
  41         #undef XIRCOM
  42 #endif
  43
  44 #define DRIVER_AUTHOR "Brian Warner <warner@lothar.com>"
  45 #define DRIVER_DESC "USB Keyspan PDA Converter driver"
  46
  47 struct keyspan_pda_private {
  48         int                     tx_room;
  49         int                     tx_throttled;
  50         struct work_struct                      wakeup_work;
  51         struct work_struct                      unthrottle_work;
  52         struct usb_serial       *serial;
  53         struct usb_serial_port  *port;
  54 };
  55
  56
  57 #define KEYSPAN_VENDOR_ID               0x06cd
  58 #define KEYSPAN_PDA_FAKE_ID             0x0103
  59 #define KEYSPAN_PDA_ID                  0x0104 /* no clue */
  60
  61 /* For Xircom PGSDB9 and older Entrega version of the same device */
  62 #define XIRCOM_VENDOR_ID                0x085a
  63 #define XIRCOM_FAKE_ID                  0x8027
  64 #define XIRCOM_FAKE_ID_2                0x8025 /* "PGMFHUB" serial */
  65 #define ENTREGA_VENDOR_ID               0x1645
  66 #define ENTREGA_FAKE_ID                 0x8093
  67
  68 static const struct usb_device_id id_table_combined[] = {
  69 #ifdef KEYSPAN
  70         { USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_FAKE_ID) },
  71 #endif
  72 #ifdef XIRCOM
  73         { USB_DEVICE(XIRCOM_VENDOR_ID, XIRCOM_FAKE_ID) },
  74         { USB_DEVICE(XIRCOM_VENDOR_ID, XIRCOM_FAKE_ID_2) },
  75         { USB_DEVICE(ENTREGA_VENDOR_ID, ENTREGA_FAKE_ID) },
  76 #endif
  77         { USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_ID) },
  78         { }                                             /* Terminating entry */
  79 };
  80
  81 MODULE_DEVICE_TABLE(usb, id_table_combined);
  82
  83 static const struct usb_device_id id_table_std[] = {
  84         { USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_ID) },
  85         { }                                             /* Terminating entry */
  86 };
  87
  88 #ifdef KEYSPAN
  89 static const struct usb_device_id id_table_fake[] = {
  90         { USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_FAKE_ID) },
  91         { }                                             /* Terminating entry */
  92 };
  93 #endif
  94
  95 #ifdef XIRCOM
  96 static const struct usb_device_id id_table_fake_xircom[] = {
  97         { USB_DEVICE(XIRCOM_VENDOR_ID, XIRCOM_FAKE_ID) },
  98         { USB_DEVICE(XIRCOM_VENDOR_ID, XIRCOM_FAKE_ID_2) },
  99         { USB_DEVICE(ENTREGA_VENDOR_ID, ENTREGA_FAKE_ID) },
 100         { }
 101 };
 102 #endif
 103
 104 static void keyspan_pda_wakeup_write(struct work_struct *work)
 105 {
 106         struct keyspan_pda_private *priv =
 107                 container_of(work, struct keyspan_pda_private, wakeup_work);
 108         struct usb_serial_port *port = priv->port;
 109
 110         tty_port_tty_wakeup(&port->port);
 111 }
 112
 113 static void keyspan_pda_request_unthrottle(struct work_struct *work)
 114 {
 115         struct keyspan_pda_private *priv =
 116                 container_of(work, struct keyspan_pda_private, unthrottle_work);
 117         struct usb_serial *serial = priv->serial;
 118         int result;
 119
 120         /* ask the device to tell us when the tx buffer becomes
 121            sufficiently empty */
 122         result = usb_control_msg(serial->dev,
 123                                  usb_sndctrlpipe(serial->dev, 0),
 124                                  7, /* request_unthrottle */
 125                                  USB_TYPE_VENDOR | USB_RECIP_INTERFACE
 126                                  | USB_DIR_OUT,
 127                                  16, /* value: threshold */
 128                                  0, /* index */
 129                                  NULL,
 130                                  0,
 131                                  2000);
 132         if (result < 0)
 133                 dev_dbg(&serial->dev->dev, "%s - error %d from usb_control_msg\n",
 134                         __func__, result);
 135 }
 136
 137
 138 static void keyspan_pda_rx_interrupt(struct urb *urb)
 139 {
 140         struct usb_serial_port *port = urb->context;
 141         unsigned char *data = urb->transfer_buffer;
 142         int retval;
 143         int status = urb->status;
 144         struct keyspan_pda_private *priv;
 145         priv = usb_get_serial_port_data(port);
 146
 147         switch (status) {
 148         case 0:
 149                 /* success */
 150                 break;
 151         case -ECONNRESET:
 152         case -ENOENT:
 153         case -ESHUTDOWN:
 154                 /* this urb is terminated, clean up */
 155                 dev_dbg(&urb->dev->dev, "%s - urb shutting down with status: %d\n", __func__, status);
 156                 return;
 157         default:
 158                 dev_dbg(&urb->dev->dev, "%s - nonzero urb status received: %d\n", __func__, status);
 159                 goto exit;
 160         }
 161
 162         /* see if the message is data or a status interrupt */
 163         switch (data[0]) {
 164         case 0:
 165                  /* rest of message is rx data */
 166                 if (urb->actual_length) {
 167                         tty_insert_flip_string(&port->port, data + 1,
 168                                                 urb->actual_length - 1);
 169                         tty_flip_buffer_push(&port->port);
 170                 }
 171                 break;
 172         case 1:
 173                 /* status interrupt */
 174                 dev_dbg(&port->dev, "rx int, d1=%d, d2=%d\n", data[1], data[2]);
 175                 switch (data[1]) {
 176                 case 1: /* modemline change */
 177                         break;
 178                 case 2: /* tx unthrottle interrupt */
 179                         priv->tx_throttled = 0;
 180                         /* queue up a wakeup at scheduler time */
 181                         schedule_work(&priv->wakeup_work);
 182                         break;
 183                 default:
 184                         break;
 185                 }
 186                 break;
 187         default:
 188                 break;
 189         }
 190
 191 exit:
 192         retval = usb_submit_urb(urb, GFP_ATOMIC);
 193         if (retval)
 194                 dev_err(&port->dev,
 195                         "%s - usb_submit_urb failed with result %d\n",
 196                         __func__, retval);
 197 }
 198
 199
 200 static void keyspan_pda_rx_throttle(struct tty_struct *tty)
 201 {
 202         /* stop receiving characters. We just turn off the URB request, and
 203            let chars pile up in the device. If we're doing hardware
 204            flowcontrol, the device will signal the other end when its buffer
 205            fills up. If we're doing XON/XOFF, this would be a good time to
 206            send an XOFF, although it might make sense to foist that off
 207            upon the device too. */
 208         struct usb_serial_port *port = tty->driver_data;
 209
 210         usb_kill_urb(port->interrupt_in_urb);
 211 }
 212
 213
 214 static void keyspan_pda_rx_unthrottle(struct tty_struct *tty)
 215 {
 216         struct usb_serial_port *port = tty->driver_data;
 217         /* just restart the receive interrupt URB */
 218
 219         if (usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL))
 220                 dev_dbg(&port->dev, "usb_submit_urb(read urb) failed\n");
 221 }
 222
 223
 224 static speed_t keyspan_pda_setbaud(struct usb_serial *serial, speed_t baud)
 225 {
 226         int rc;
 227         int bindex;
 228
 229         switch (baud) {
 230         case 110:
 231                 bindex = 0;
 232                 break;
 233         case 300:
 234                 bindex = 1;
 235                 break;
 236         case 1200:
 237                 bindex = 2;
 238                 break;
 239         case 2400:
 240                 bindex = 3;
 241                 break;
 242         case 4800:
 243                 bindex = 4;
 244                 break;
 245         case 9600:
 246                 bindex = 5;
 247                 break;
 248         case 19200:
 249                 bindex = 6;
 250                 break;
 251         case 38400:
 252                 bindex = 7;
 253                 break;
 254         case 57600:
 255                 bindex = 8;
 256                 break;
 257         case 115200:
 258                 bindex = 9;
 259                 break;
 260         default:
 261                 bindex = 5;     /* Default to 9600 */
 262                 baud = 9600;
 263         }
 264
 265         /* rather than figure out how to sleep while waiting for this
 266            to complete, I just use the "legacy" API. */
 267         rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
 268                              0, /* set baud */
 269                              USB_TYPE_VENDOR
 270                              | USB_RECIP_INTERFACE
 271                              | USB_DIR_OUT, /* type */
 272                              bindex, /* value */
 273                              0, /* index */
 274                              NULL, /* &data */
 275                              0, /* size */
 276                              2000); /* timeout */
 277         if (rc < 0)
 278                 return 0;
 279         return baud;
 280 }
 281
 282
 283 static void keyspan_pda_break_ctl(struct tty_struct *tty, int break_state)
 284 {
 285         struct usb_serial_port *port = tty->driver_data;
 286         struct usb_serial *serial = port->serial;
 287         int value;
 288         int result;
 289
 290         if (break_state == -1)
 291                 value = 1; /* start break */
 292         else
 293                 value = 0; /* clear break */
 294         result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
 295                         4, /* set break */
 296                         USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_OUT,
 297                         value, 0, NULL, 0, 2000);
 298         if (result < 0)
 299                 dev_dbg(&port->dev, "%s - error %d from usb_control_msg\n",
 300                         __func__, result);
 301         /* there is something funky about this.. the TCSBRK that 'cu' performs
 302            ought to translate into a break_ctl(-1),break_ctl(0) pair HZ/4
 303            seconds apart, but it feels like the break sent isn't as long as it
 304            is on /dev/ttyS0 */
 305 }
 306
 307
 308 static void keyspan_pda_set_termios(struct tty_struct *tty,
 309                 struct usb_serial_port *port, struct ktermios *old_termios)
 310 {
 311         struct usb_serial *serial = port->serial;
 312         speed_t speed;
 313
 314         /* cflag specifies lots of stuff: number of stop bits, parity, number
 315            of data bits, baud. What can the device actually handle?:
 316            CSTOPB (1 stop bit or 2)
 317            PARENB (parity)
 318            CSIZE (5bit .. 8bit)
 319            There is minimal hw support for parity (a PSW bit seems to hold the
 320            parity of whatever is in the accumulator). The UART either deals
 321            with 10 bits (start, 8 data, stop) or 11 bits (start, 8 data,
 322            1 special, stop). So, with firmware changes, we could do:
 323            8N1: 10 bit
 324            8N2: 11 bit, extra bit always (mark?)
 325            8[EOMS]1: 11 bit, extra bit is parity
 326            7[EOMS]1: 10 bit, b0/b7 is parity
 327            7[EOMS]2: 11 bit, b0/b7 is parity, extra bit always (mark?)
 328
 329            HW flow control is dictated by the tty->termios.c_cflags & CRTSCTS
 330            bit.
 331
 332            For now, just do baud. */
 333
 334         speed = tty_get_baud_rate(tty);
 335         speed = keyspan_pda_setbaud(serial, speed);
 336
 337         if (speed == 0) {
 338                 dev_dbg(&port->dev, "can't handle requested baud rate\n");
 339                 /* It hasn't changed so.. */
 340                 speed = tty_termios_baud_rate(old_termios);
 341         }
 342         /* Only speed can change so copy the old h/w parameters
 343            then encode the new speed */
 344         tty_termios_copy_hw(&tty->termios, old_termios);
 345         tty_encode_baud_rate(tty, speed, speed);
 346 }
 347
 348
 349 /* modem control pins: DTR and RTS are outputs and can be controlled.
 350    DCD, RI, DSR, CTS are inputs and can be read. All outputs can also be
 351    read. The byte passed is: DTR(b7) DCD RI DSR CTS RTS(b2) unused unused */
 352
 353 static int keyspan_pda_get_modem_info(struct usb_serial *serial,
 354                                       unsigned char *value)
 355 {
 356         int rc;
 357         u8 *data;
 358
 359         data = kmalloc(1, GFP_KERNEL);
 360         if (!data)
 361                 return -ENOMEM;
 362
 363         rc = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
 364                              3, /* get pins */
 365                              USB_TYPE_VENDOR|USB_RECIP_INTERFACE|USB_DIR_IN,
 366                              0, 0, data, 1, 2000);
 367         if (rc >= 0)
 368                 *value = *data;
 369
 370         kfree(data);
 371         return rc;
 372 }
 373
 374
 375 static int keyspan_pda_set_modem_info(struct usb_serial *serial,
 376                                       unsigned char value)
 377 {
 378         int rc;
 379         rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
 380                              3, /* set pins */
 381                              USB_TYPE_VENDOR|USB_RECIP_INTERFACE|USB_DIR_OUT,
 382                              value, 0, NULL, 0, 2000);
 383         return rc;
 384 }
 385
 386 static int keyspan_pda_tiocmget(struct tty_struct *tty)
 387 {
 388         struct usb_serial_port *port = tty->driver_data;
 389         struct usb_serial *serial = port->serial;
 390         int rc;
 391         unsigned char status;
 392         int value;
 393
 394         rc = keyspan_pda_get_modem_info(serial, &status);
 395         if (rc < 0)
 396                 return rc;
 397         value =
 398                 ((status & (1<<7)) ? TIOCM_DTR : 0) |
 399                 ((status & (1<<6)) ? TIOCM_CAR : 0) |
 400                 ((status & (1<<5)) ? TIOCM_RNG : 0) |
 401                 ((status & (1<<4)) ? TIOCM_DSR : 0) |
 402                 ((status & (1<<3)) ? TIOCM_CTS : 0) |
 403                 ((status & (1<<2)) ? TIOCM_RTS : 0);
 404         return value;
 405 }
 406
 407 static int keyspan_pda_tiocmset(struct tty_struct *tty,
 408                                 unsigned int set, unsigned int clear)
 409 {
 410         struct usb_serial_port *port = tty->driver_data;
 411         struct usb_serial *serial = port->serial;
 412         int rc;
 413         unsigned char status;
 414
 415         rc = keyspan_pda_get_modem_info(serial, &status);
 416         if (rc < 0)
 417                 return rc;
 418
 419         if (set & TIOCM_RTS)
 420                 status |= (1<<2);
 421         if (set & TIOCM_DTR)
 422                 status |= (1<<7);
 423
 424         if (clear & TIOCM_RTS)
 425                 status &= ~(1<<2);
 426         if (clear & TIOCM_DTR)
 427                 status &= ~(1<<7);
 428         rc = keyspan_pda_set_modem_info(serial, status);
 429         return rc;
 430 }
 431
 432 static int keyspan_pda_write(struct tty_struct *tty,
 433         struct usb_serial_port *port, const unsigned char *buf, int count)
 434 {
 435         struct usb_serial *serial = port->serial;
 436         int request_unthrottle = 0;
 437         int rc = 0;
 438         struct keyspan_pda_private *priv;
 439
 440         priv = usb_get_serial_port_data(port);
 441         /* guess how much room is left in the device's ring buffer, and if we
 442            want to send more than that, check first, updating our notion of
 443            what is left. If our write will result in no room left, ask the
 444            device to give us an interrupt when the room available rises above
 445            a threshold, and hold off all writers (eventually, those using
 446            select() or poll() too) until we receive that unthrottle interrupt.
 447            Block if we can't write anything at all, otherwise write as much as
 448            we can. */
 449         if (count == 0) {
 450                 dev_dbg(&port->dev, "write request of 0 bytes\n");
 451                 return 0;
 452         }
 453
 454         /* we might block because of:
 455            the TX urb is in-flight (wait until it completes)
 456            the device is full (wait until it says there is room)
 457         */
 458         spin_lock_bh(&port->lock);
 459         if (!test_bit(0, &port->write_urbs_free) || priv->tx_throttled) {
 460                 spin_unlock_bh(&port->lock);
 461                 return 0;
 462         }
 463         clear_bit(0, &port->write_urbs_free);
 464         spin_unlock_bh(&port->lock);
 465
 466         /* At this point the URB is in our control, nobody else can submit it
 467            again (the only sudden transition was the one from EINPROGRESS to
 468            finished).  Also, the tx process is not throttled. So we are
 469            ready to write. */
 470
 471         count = (count > port->bulk_out_size) ? port->bulk_out_size : count;
 472
 473         /* Check if we might overrun the Tx buffer.   If so, ask the
 474            device how much room it really has.  This is done only on
 475            scheduler time, since usb_control_msg() sleeps. */
 476         if (count > priv->tx_room && !in_interrupt()) {
 477                 u8 *room;
 478
 479                 room = kmalloc(1, GFP_KERNEL);
 480                 if (!room) {
 481                         rc = -ENOMEM;
 482                         goto exit;
 483                 }
 484
 485                 rc = usb_control_msg(serial->dev,
 486                                      usb_rcvctrlpipe(serial->dev, 0),
 487                                      6, /* write_room */
 488                                      USB_TYPE_VENDOR | USB_RECIP_INTERFACE
 489                                      | USB_DIR_IN,
 490                                      0, /* value: 0 means "remaining room" */
 491                                      0, /* index */
 492                                      room,
 493                                      1,
 494                                      2000);
 495                 if (rc > 0) {
 496                         dev_dbg(&port->dev, "roomquery says %d\n", *room);
 497                         priv->tx_room = *room;
 498                 }
 499                 kfree(room);
 500                 if (rc < 0) {
 501                         dev_dbg(&port->dev, "roomquery failed\n");
 502                         goto exit;
 503                 }
 504                 if (rc == 0) {
 505                         dev_dbg(&port->dev, "roomquery returned 0 bytes\n");
 506                         rc = -EIO; /* device didn't return any data */
 507                         goto exit;
 508                 }
 509         }
 510         if (count > priv->tx_room) {
 511                 /* we're about to completely fill the Tx buffer, so
 512                    we'll be throttled afterwards. */
 513                 count = priv->tx_room;
 514                 request_unthrottle = 1;
 515         }
 516
 517         if (count) {
 518                 /* now transfer data */
 519                 memcpy(port->write_urb->transfer_buffer, buf, count);
 520                 /* send the data out the bulk port */
 521                 port->write_urb->transfer_buffer_length = count;
 522
 523                 priv->tx_room -= count;
 524
 525                 rc = usb_submit_urb(port->write_urb, GFP_ATOMIC);
 526                 if (rc) {
 527                         dev_dbg(&port->dev, "usb_submit_urb(write bulk) failed\n");
 528                         goto exit;
 529                 }
 530         } else {
 531                 /* There wasn't any room left, so we are throttled until
 532                    the buffer empties a bit */
 533                 request_unthrottle = 1;
 534         }
 535
 536         if (request_unthrottle) {
 537                 priv->tx_throttled = 1; /* block writers */
 538                 schedule_work(&priv->unthrottle_work);
 539         }
 540
 541         rc = count;
 542 exit:
 543         if (rc < 0)
 544                 set_bit(0, &port->write_urbs_free);
 545         return rc;
 546 }
 547
 548
 549 static void keyspan_pda_write_bulk_callback(struct urb *urb)
 550 {
 551         struct usb_serial_port *port = urb->context;
 552         struct keyspan_pda_private *priv;
 553
 554         set_bit(0, &port->write_urbs_free);
 555         priv = usb_get_serial_port_data(port);
 556
 557         /* queue up a wakeup at scheduler time */
 558         schedule_work(&priv->wakeup_work);
 559 }
 560
 561
 562 static int keyspan_pda_write_room(struct tty_struct *tty)
 563 {
 564         struct usb_serial_port *port = tty->driver_data;
 565         struct keyspan_pda_private *priv;
 566         priv = usb_get_serial_port_data(port);
 567         /* used by n_tty.c for processing of tabs and such. Giving it our
 568            conservative guess is probably good enough, but needs testing by
 569            running a console through the device. */
 570         return priv->tx_room;
 571 }
 572
 573
 574 static int keyspan_pda_chars_in_buffer(struct tty_struct *tty)
 575 {
 576         struct usb_serial_port *port = tty->driver_data;
 577         struct keyspan_pda_private *priv;
 578         unsigned long flags;
 579         int ret = 0;
 580
 581         priv = usb_get_serial_port_data(port);
 582
 583         /* when throttled, return at least WAKEUP_CHARS to tell select() (via
 584            n_tty.c:normal_poll() ) that we're not writeable. */
 585
 586         spin_lock_irqsave(&port->lock, flags);
 587         if (!test_bit(0, &port->write_urbs_free) || priv->tx_throttled)
 588                 ret = 256;
 589         spin_unlock_irqrestore(&port->lock, flags);
 590         return ret;
 591 }
 592
 593
 594 static void keyspan_pda_dtr_rts(struct usb_serial_port *port, int on)
 595 {
 596         struct usb_serial *serial = port->serial;
 597
 598         if (on)
 599                 keyspan_pda_set_modem_info(serial, (1 << 7) | (1 << 2));
 600         else
 601                 keyspan_pda_set_modem_info(serial, 0);
 602 }
 603
 604
 605 static int keyspan_pda_open(struct tty_struct *tty,
 606                                         struct usb_serial_port *port)
 607 {
 608         struct usb_serial *serial = port->serial;
 609         u8 *room;
 610         int rc = 0;
 611         struct keyspan_pda_private *priv;
 612
 613         /* find out how much room is in the Tx ring */
 614         room = kmalloc(1, GFP_KERNEL);
 615         if (!room)
 616                 return -ENOMEM;
 617
 618         rc = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
 619                              6, /* write_room */
 620                              USB_TYPE_VENDOR | USB_RECIP_INTERFACE
 621                              | USB_DIR_IN,
 622                              0, /* value */
 623                              0, /* index */
 624                              room,
 625                              1,
 626                              2000);
 627         if (rc < 0) {
 628                 dev_dbg(&port->dev, "%s - roomquery failed\n", __func__);
 629                 goto error;
 630         }
 631         if (rc == 0) {
 632                 dev_dbg(&port->dev, "%s - roomquery returned 0 bytes\n", __func__);
 633                 rc = -EIO;
 634                 goto error;
 635         }
 636         priv = usb_get_serial_port_data(port);
 637         priv->tx_room = *room;
 638         priv->tx_throttled = *room ? 0 : 1;
 639
 640         /*Start reading from the device*/
 641         rc = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
 642         if (rc) {
 643                 dev_dbg(&port->dev, "%s - usb_submit_urb(read int) failed\n", __func__);
 644                 goto error;
 645         }
 646 error:
 647         kfree(room);
 648         return rc;
 649 }
 650 static void keyspan_pda_close(struct usb_serial_port *port)
 651 {
 652         usb_kill_urb(port->write_urb);
 653         usb_kill_urb(port->interrupt_in_urb);
 654 }
 655
 656
 657 /* download the firmware to a "fake" device (pre-renumeration) */
 658 static int keyspan_pda_fake_startup(struct usb_serial *serial)
 659 {
 660         int response;
 661         const char *fw_name;
 662
 663         /* download the firmware here ... */
 664         response = ezusb_fx1_set_reset(serial->dev, 1);
 665
 666         if (0) { ; }
 667 #ifdef KEYSPAN
 668         else if (le16_to_cpu(serial->dev->descriptor.idVendor) == KEYSPAN_VENDOR_ID)
 669                 fw_name = "keyspan_pda/keyspan_pda.fw";
 670 #endif
 671 #ifdef XIRCOM
 672         else if ((le16_to_cpu(serial->dev->descriptor.idVendor) == XIRCOM_VENDOR_ID) ||
 673                  (le16_to_cpu(serial->dev->descriptor.idVendor) == ENTREGA_VENDOR_ID))
 674                 fw_name = "keyspan_pda/xircom_pgs.fw";
 675 #endif
 676         else {
 677                 dev_err(&serial->dev->dev, "%s: unknown vendor, aborting.\n",
 678                         __func__);
 679                 return -ENODEV;
 680         }
 681
 682         if (ezusb_fx1_ihex_firmware_download(serial->dev, fw_name) < 0) {
 683                 dev_err(&serial->dev->dev, "failed to load firmware \"%s\"\n",
 684                         fw_name);
 685                 return -ENOENT;
 686         }
 687
 688         /* after downloading firmware Renumeration will occur in a
 689           moment and the new device will bind to the real driver */
 690
 691         /* we want this device to fail to have a driver assigned to it. */
 692         return 1;
 693 }
 694
 695 #ifdef KEYSPAN
 696 MODULE_FIRMWARE("keyspan_pda/keyspan_pda.fw");
 697 #endif
 698 #ifdef XIRCOM
 699 MODULE_FIRMWARE("keyspan_pda/xircom_pgs.fw");
 700 #endif
 701
 702 static int keyspan_pda_port_probe(struct usb_serial_port *port)
 703 {
 704
 705         struct keyspan_pda_private *priv;
 706
 707         priv = kmalloc(sizeof(struct keyspan_pda_private), GFP_KERNEL);
 708         if (!priv)
 709                 return -ENOMEM;
 710
 711         INIT_WORK(&priv->wakeup_work, keyspan_pda_wakeup_write);
 712         INIT_WORK(&priv->unthrottle_work, keyspan_pda_request_unthrottle);
 713         priv->serial = port->serial;
 714         priv->port = port;
 715
 716         usb_set_serial_port_data(port, priv);
 717
 718         return 0;
 719 }
 720
 721 static int keyspan_pda_port_remove(struct usb_serial_port *port)
 722 {
 723         struct keyspan_pda_private *priv;
 724
 725         priv = usb_get_serial_port_data(port);
 726         kfree(priv);
 727
 728         return 0;
 729 }
 730
 731 #ifdef KEYSPAN
 732 static struct usb_serial_driver keyspan_pda_fake_device = {
 733         .driver = {
 734                 .owner =        THIS_MODULE,
 735                 .name =         "keyspan_pda_pre",
 736         },
 737         .description =          "Keyspan PDA - (prerenumeration)",
 738         .id_table =             id_table_fake,
 739         .num_ports =            1,
 740         .attach =               keyspan_pda_fake_startup,
 741 };
 742 #endif
 743
 744 #ifdef XIRCOM
 745 static struct usb_serial_driver xircom_pgs_fake_device = {
 746         .driver = {
 747                 .owner =        THIS_MODULE,
 748                 .name =         "xircom_no_firm",
 749         },
 750         .description =          "Xircom / Entrega PGS - (prerenumeration)",
 751         .id_table =             id_table_fake_xircom,
 752         .num_ports =            1,
 753         .attach =               keyspan_pda_fake_startup,
 754 };
 755 #endif
 756
 757 static struct usb_serial_driver keyspan_pda_device = {
 758         .driver = {
 759                 .owner =        THIS_MODULE,
 760                 .name =         "keyspan_pda",
 761         },
 762         .description =          "Keyspan PDA",
 763         .id_table =             id_table_std,
 764         .num_ports =            1,
 765         .dtr_rts =              keyspan_pda_dtr_rts,
 766         .open =                 keyspan_pda_open,
 767         .close =                keyspan_pda_close,
 768         .write =                keyspan_pda_write,
 769         .write_room =           keyspan_pda_write_room,
 770         .write_bulk_callback =  keyspan_pda_write_bulk_callback,
 771         .read_int_callback =    keyspan_pda_rx_interrupt,
 772         .chars_in_buffer =      keyspan_pda_chars_in_buffer,
 773         .throttle =             keyspan_pda_rx_throttle,
 774         .unthrottle =           keyspan_pda_rx_unthrottle,
 775         .set_termios =          keyspan_pda_set_termios,
 776         .break_ctl =            keyspan_pda_break_ctl,
 777         .tiocmget =             keyspan_pda_tiocmget,
 778         .tiocmset =             keyspan_pda_tiocmset,
 779         .port_probe =           keyspan_pda_port_probe,
 780         .port_remove =          keyspan_pda_port_remove,
 781 };
 782
 783 static struct usb_serial_driver * const serial_drivers[] = {
 784         &keyspan_pda_device,
 785 #ifdef KEYSPAN
 786         &keyspan_pda_fake_device,
 787 #endif
 788 #ifdef XIRCOM
 789         &xircom_pgs_fake_device,
 790 #endif
 791         NULL
 792 };
 793
 794 module_usb_serial_driver(serial_drivers, id_table_combined);
 795
 796 MODULE_AUTHOR(DRIVER_AUTHOR);
 797 MODULE_DESCRIPTION(DRIVER_DESC);
 798 MODULE_LICENSE("GPL");