2 * USB Keyspan PDA / Xircom / Entrega Converter driver
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>
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.
13 * See Documentation/usb/usb-serial.txt for more information on using this
17 * cleaned up the Xircom support. Added ids for Entregra device which is
18 * the same as the Xircom device. Enabled the code to be compiled for
19 * either Xircom or Keyspan devices.
21 * (08/11/2001) Cristian M. Craciunescu
22 * support for Xircom PGSDB9
25 * switched from using spinlock to a semaphore, which fixes lots of
29 * Identify version on module load.
31 * (11/01/2000) Adam J. Richter
32 * usb_device_id table support
35 * Fixed bug with urb->dev not being set properly, now that the usb
39 * Added locks for SMP safeness.
40 * Fixed MOD_INC and MOD_DEC logic and the ability to open a port more
43 * (07/20/2000) borchers
44 * - keyspan_pda_write no longer sleeps if it is called on interrupt time;
45 * PPP and the line discipline with stty echo on can call write on
46 * interrupt time and this would cause an oops if write slept
47 * - if keyspan_pda_write is in an interrupt, it will not call
48 * usb_control_msg (which sleeps) to query the room in the device
49 * buffer, it simply uses the current room value it has
50 * - if the urb is busy or if it is throttled keyspan_pda_write just
51 * returns 0, rather than sleeping to wait for this to change; the
52 * write_chan code in n_tty.c will sleep if needed before calling
53 * keyspan_pda_write again
54 * - if the device needs to be unthrottled, write now queues up the
55 * call to usb_control_msg (which sleeps) to unthrottle the device
56 * - the wakeups from keyspan_pda_write_bulk_callback are queued rather
57 * than done directly from the callback to avoid the race in write_chan
58 * - keyspan_pda_chars_in_buffer also indicates its buffer is full if the
59 * urb status is -EINPROGRESS, meaning it cannot write at the moment
62 * Added module_init and module_exit functions to handle the fact that this
63 * driver is a loadable module now.
66 * Split driver up into device specific pieces.
71 #include <linux/kernel.h>
72 #include <linux/errno.h>
73 #include <linux/init.h>
74 #include <linux/slab.h>
75 #include <linux/tty.h>
76 #include <linux/tty_driver.h>
77 #include <linux/tty_flip.h>
78 #include <linux/module.h>
79 #include <linux/spinlock.h>
80 #include <linux/workqueue.h>
81 #include <linux/firmware.h>
82 #include <linux/ihex.h>
83 #include <linux/uaccess.h>
84 #include <linux/usb.h>
85 #include <linux/usb/serial.h>
89 /* make a simple define to handle if we are compiling keyspan_pda or xircom support */
90 #if defined(CONFIG_USB_SERIAL_KEYSPAN_PDA) || defined(CONFIG_USB_SERIAL_KEYSPAN_PDA_MODULE)
95 #if defined(CONFIG_USB_SERIAL_XIRCOM) || defined(CONFIG_USB_SERIAL_XIRCOM_MODULE)
102 * Version Information
104 #define DRIVER_VERSION "v1.1"
105 #define DRIVER_AUTHOR "Brian Warner <warner@lothar.com>"
106 #define DRIVER_DESC "USB Keyspan PDA Converter driver"
108 struct keyspan_pda_private {
111 struct work_struct wakeup_work;
112 struct work_struct unthrottle_work;
113 struct usb_serial *serial;
114 struct usb_serial_port *port;
118 #define KEYSPAN_VENDOR_ID 0x06cd
119 #define KEYSPAN_PDA_FAKE_ID 0x0103
120 #define KEYSPAN_PDA_ID 0x0104 /* no clue */
122 /* For Xircom PGSDB9 and older Entrega version of the same device */
123 #define XIRCOM_VENDOR_ID 0x085a
124 #define XIRCOM_FAKE_ID 0x8027
125 #define XIRCOM_FAKE_ID_2 0x8025 /* "PGMFHUB" serial */
126 #define ENTREGA_VENDOR_ID 0x1645
127 #define ENTREGA_FAKE_ID 0x8093
129 static const struct usb_device_id id_table_combined[] = {
131 { USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_FAKE_ID) },
134 { USB_DEVICE(XIRCOM_VENDOR_ID, XIRCOM_FAKE_ID) },
135 { USB_DEVICE(XIRCOM_VENDOR_ID, XIRCOM_FAKE_ID_2) },
136 { USB_DEVICE(ENTREGA_VENDOR_ID, ENTREGA_FAKE_ID) },
138 { USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_ID) },
139 { } /* Terminating entry */
142 MODULE_DEVICE_TABLE(usb, id_table_combined);
144 static struct usb_driver keyspan_pda_driver = {
145 .name = "keyspan_pda",
146 .probe = usb_serial_probe,
147 .disconnect = usb_serial_disconnect,
148 .id_table = id_table_combined,
152 static const struct usb_device_id id_table_std[] = {
153 { USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_ID) },
154 { } /* Terminating entry */
158 static const struct usb_device_id id_table_fake[] = {
159 { USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_FAKE_ID) },
160 { } /* Terminating entry */
165 static const struct usb_device_id id_table_fake_xircom[] = {
166 { USB_DEVICE(XIRCOM_VENDOR_ID, XIRCOM_FAKE_ID) },
167 { USB_DEVICE(XIRCOM_VENDOR_ID, XIRCOM_FAKE_ID_2) },
168 { USB_DEVICE(ENTREGA_VENDOR_ID, ENTREGA_FAKE_ID) },
173 static void keyspan_pda_wakeup_write(struct work_struct *work)
175 struct keyspan_pda_private *priv =
176 container_of(work, struct keyspan_pda_private, wakeup_work);
177 struct usb_serial_port *port = priv->port;
178 struct tty_struct *tty = tty_port_tty_get(&port->port);
184 static void keyspan_pda_request_unthrottle(struct work_struct *work)
186 struct keyspan_pda_private *priv =
187 container_of(work, struct keyspan_pda_private, unthrottle_work);
188 struct usb_serial *serial = priv->serial;
191 dbg(" request_unthrottle");
192 /* ask the device to tell us when the tx buffer becomes
193 sufficiently empty */
194 result = usb_control_msg(serial->dev,
195 usb_sndctrlpipe(serial->dev, 0),
196 7, /* request_unthrottle */
197 USB_TYPE_VENDOR | USB_RECIP_INTERFACE
199 16, /* value: threshold */
205 dbg("%s - error %d from usb_control_msg",
210 static void keyspan_pda_rx_interrupt(struct urb *urb)
212 struct usb_serial_port *port = urb->context;
213 struct tty_struct *tty;
214 unsigned char *data = urb->transfer_buffer;
216 int status = urb->status;
217 struct keyspan_pda_private *priv;
218 priv = usb_get_serial_port_data(port);
227 /* this urb is terminated, clean up */
228 dbg("%s - urb shutting down with status: %d",
232 dbg("%s - nonzero urb status received: %d",
237 /* see if the message is data or a status interrupt */
240 tty = tty_port_tty_get(&port->port);
241 /* rest of message is rx data */
242 if (tty && urb->actual_length) {
243 tty_insert_flip_string(tty, data + 1,
244 urb->actual_length - 1);
245 tty_flip_buffer_push(tty);
250 /* status interrupt */
251 dbg(" rx int, d1=%d, d2=%d", data[1], data[2]);
253 case 1: /* modemline change */
255 case 2: /* tx unthrottle interrupt */
256 priv->tx_throttled = 0;
257 /* queue up a wakeup at scheduler time */
258 schedule_work(&priv->wakeup_work);
269 retval = usb_submit_urb(urb, GFP_ATOMIC);
272 "%s - usb_submit_urb failed with result %d",
277 static void keyspan_pda_rx_throttle(struct tty_struct *tty)
279 /* stop receiving characters. We just turn off the URB request, and
280 let chars pile up in the device. If we're doing hardware
281 flowcontrol, the device will signal the other end when its buffer
282 fills up. If we're doing XON/XOFF, this would be a good time to
283 send an XOFF, although it might make sense to foist that off
284 upon the device too. */
285 struct usb_serial_port *port = tty->driver_data;
286 dbg("keyspan_pda_rx_throttle port %d", port->number);
287 usb_kill_urb(port->interrupt_in_urb);
291 static void keyspan_pda_rx_unthrottle(struct tty_struct *tty)
293 struct usb_serial_port *port = tty->driver_data;
294 /* just restart the receive interrupt URB */
295 dbg("keyspan_pda_rx_unthrottle port %d", port->number);
296 port->interrupt_in_urb->dev = port->serial->dev;
297 if (usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL))
298 dbg(" usb_submit_urb(read urb) failed");
302 static speed_t keyspan_pda_setbaud(struct usb_serial *serial, speed_t baud)
339 bindex = 5; /* Default to 9600 */
343 /* rather than figure out how to sleep while waiting for this
344 to complete, I just use the "legacy" API. */
345 rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
348 | USB_RECIP_INTERFACE
349 | USB_DIR_OUT, /* type */
361 static void keyspan_pda_break_ctl(struct tty_struct *tty, int break_state)
363 struct usb_serial_port *port = tty->driver_data;
364 struct usb_serial *serial = port->serial;
368 if (break_state == -1)
369 value = 1; /* start break */
371 value = 0; /* clear break */
372 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
374 USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_OUT,
375 value, 0, NULL, 0, 2000);
377 dbg("%s - error %d from usb_control_msg",
379 /* there is something funky about this.. the TCSBRK that 'cu' performs
380 ought to translate into a break_ctl(-1),break_ctl(0) pair HZ/4
381 seconds apart, but it feels like the break sent isn't as long as it
386 static void keyspan_pda_set_termios(struct tty_struct *tty,
387 struct usb_serial_port *port, struct ktermios *old_termios)
389 struct usb_serial *serial = port->serial;
392 /* cflag specifies lots of stuff: number of stop bits, parity, number
393 of data bits, baud. What can the device actually handle?:
394 CSTOPB (1 stop bit or 2)
397 There is minimal hw support for parity (a PSW bit seems to hold the
398 parity of whatever is in the accumulator). The UART either deals
399 with 10 bits (start, 8 data, stop) or 11 bits (start, 8 data,
400 1 special, stop). So, with firmware changes, we could do:
402 8N2: 11 bit, extra bit always (mark?)
403 8[EOMS]1: 11 bit, extra bit is parity
404 7[EOMS]1: 10 bit, b0/b7 is parity
405 7[EOMS]2: 11 bit, b0/b7 is parity, extra bit always (mark?)
407 HW flow control is dictated by the tty->termios->c_cflags & CRTSCTS
410 For now, just do baud. */
412 speed = tty_get_baud_rate(tty);
413 speed = keyspan_pda_setbaud(serial, speed);
416 dbg("can't handle requested baud rate");
417 /* It hasn't changed so.. */
418 speed = tty_termios_baud_rate(old_termios);
420 /* Only speed can change so copy the old h/w parameters
421 then encode the new speed */
422 tty_termios_copy_hw(tty->termios, old_termios);
423 tty_encode_baud_rate(tty, speed, speed);
427 /* modem control pins: DTR and RTS are outputs and can be controlled.
428 DCD, RI, DSR, CTS are inputs and can be read. All outputs can also be
429 read. The byte passed is: DTR(b7) DCD RI DSR CTS RTS(b2) unused unused */
431 static int keyspan_pda_get_modem_info(struct usb_serial *serial,
432 unsigned char *value)
437 data = kmalloc(1, GFP_KERNEL);
441 rc = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
443 USB_TYPE_VENDOR|USB_RECIP_INTERFACE|USB_DIR_IN,
444 0, 0, data, 1, 2000);
453 static int keyspan_pda_set_modem_info(struct usb_serial *serial,
457 rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
459 USB_TYPE_VENDOR|USB_RECIP_INTERFACE|USB_DIR_OUT,
460 value, 0, NULL, 0, 2000);
464 static int keyspan_pda_tiocmget(struct tty_struct *tty)
466 struct usb_serial_port *port = tty->driver_data;
467 struct usb_serial *serial = port->serial;
469 unsigned char status;
472 rc = keyspan_pda_get_modem_info(serial, &status);
476 ((status & (1<<7)) ? TIOCM_DTR : 0) |
477 ((status & (1<<6)) ? TIOCM_CAR : 0) |
478 ((status & (1<<5)) ? TIOCM_RNG : 0) |
479 ((status & (1<<4)) ? TIOCM_DSR : 0) |
480 ((status & (1<<3)) ? TIOCM_CTS : 0) |
481 ((status & (1<<2)) ? TIOCM_RTS : 0);
485 static int keyspan_pda_tiocmset(struct tty_struct *tty,
486 unsigned int set, unsigned int clear)
488 struct usb_serial_port *port = tty->driver_data;
489 struct usb_serial *serial = port->serial;
491 unsigned char status;
493 rc = keyspan_pda_get_modem_info(serial, &status);
502 if (clear & TIOCM_RTS)
504 if (clear & TIOCM_DTR)
506 rc = keyspan_pda_set_modem_info(serial, status);
510 static int keyspan_pda_write(struct tty_struct *tty,
511 struct usb_serial_port *port, const unsigned char *buf, int count)
513 struct usb_serial *serial = port->serial;
514 int request_unthrottle = 0;
516 struct keyspan_pda_private *priv;
518 priv = usb_get_serial_port_data(port);
519 /* guess how much room is left in the device's ring buffer, and if we
520 want to send more than that, check first, updating our notion of
521 what is left. If our write will result in no room left, ask the
522 device to give us an interrupt when the room available rises above
523 a threshold, and hold off all writers (eventually, those using
524 select() or poll() too) until we receive that unthrottle interrupt.
525 Block if we can't write anything at all, otherwise write as much as
527 dbg("keyspan_pda_write(%d)", count);
529 dbg(" write request of 0 bytes");
533 /* we might block because of:
534 the TX urb is in-flight (wait until it completes)
535 the device is full (wait until it says there is room)
537 spin_lock_bh(&port->lock);
538 if (port->write_urb_busy || priv->tx_throttled) {
539 spin_unlock_bh(&port->lock);
542 port->write_urb_busy = 1;
543 spin_unlock_bh(&port->lock);
545 /* At this point the URB is in our control, nobody else can submit it
546 again (the only sudden transition was the one from EINPROGRESS to
547 finished). Also, the tx process is not throttled. So we are
550 count = (count > port->bulk_out_size) ? port->bulk_out_size : count;
552 /* Check if we might overrun the Tx buffer. If so, ask the
553 device how much room it really has. This is done only on
554 scheduler time, since usb_control_msg() sleeps. */
555 if (count > priv->tx_room && !in_interrupt()) {
558 room = kmalloc(1, GFP_KERNEL);
564 rc = usb_control_msg(serial->dev,
565 usb_rcvctrlpipe(serial->dev, 0),
567 USB_TYPE_VENDOR | USB_RECIP_INTERFACE
569 0, /* value: 0 means "remaining room" */
575 dbg(" roomquery says %d", *room);
576 priv->tx_room = *room;
580 dbg(" roomquery failed");
584 dbg(" roomquery returned 0 bytes");
585 rc = -EIO; /* device didn't return any data */
589 if (count > priv->tx_room) {
590 /* we're about to completely fill the Tx buffer, so
591 we'll be throttled afterwards. */
592 count = priv->tx_room;
593 request_unthrottle = 1;
597 /* now transfer data */
598 memcpy(port->write_urb->transfer_buffer, buf, count);
599 /* send the data out the bulk port */
600 port->write_urb->transfer_buffer_length = count;
602 priv->tx_room -= count;
604 port->write_urb->dev = port->serial->dev;
605 rc = usb_submit_urb(port->write_urb, GFP_ATOMIC);
607 dbg(" usb_submit_urb(write bulk) failed");
611 /* There wasn't any room left, so we are throttled until
612 the buffer empties a bit */
613 request_unthrottle = 1;
616 if (request_unthrottle) {
617 priv->tx_throttled = 1; /* block writers */
618 schedule_work(&priv->unthrottle_work);
624 port->write_urb_busy = 0;
629 static void keyspan_pda_write_bulk_callback(struct urb *urb)
631 struct usb_serial_port *port = urb->context;
632 struct keyspan_pda_private *priv;
634 port->write_urb_busy = 0;
635 priv = usb_get_serial_port_data(port);
637 /* queue up a wakeup at scheduler time */
638 schedule_work(&priv->wakeup_work);
642 static int keyspan_pda_write_room(struct tty_struct *tty)
644 struct usb_serial_port *port = tty->driver_data;
645 struct keyspan_pda_private *priv;
646 priv = usb_get_serial_port_data(port);
647 /* used by n_tty.c for processing of tabs and such. Giving it our
648 conservative guess is probably good enough, but needs testing by
649 running a console through the device. */
650 return priv->tx_room;
654 static int keyspan_pda_chars_in_buffer(struct tty_struct *tty)
656 struct usb_serial_port *port = tty->driver_data;
657 struct keyspan_pda_private *priv;
661 priv = usb_get_serial_port_data(port);
663 /* when throttled, return at least WAKEUP_CHARS to tell select() (via
664 n_tty.c:normal_poll() ) that we're not writeable. */
666 spin_lock_irqsave(&port->lock, flags);
667 if (port->write_urb_busy || priv->tx_throttled)
669 spin_unlock_irqrestore(&port->lock, flags);
674 static void keyspan_pda_dtr_rts(struct usb_serial_port *port, int on)
676 struct usb_serial *serial = port->serial;
680 keyspan_pda_set_modem_info(serial, (1<<7) | (1<< 2));
682 keyspan_pda_set_modem_info(serial, 0);
687 static int keyspan_pda_open(struct tty_struct *tty,
688 struct usb_serial_port *port)
690 struct usb_serial *serial = port->serial;
693 struct keyspan_pda_private *priv;
695 /* find out how much room is in the Tx ring */
696 room = kmalloc(1, GFP_KERNEL);
700 rc = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
702 USB_TYPE_VENDOR | USB_RECIP_INTERFACE
710 dbg("%s - roomquery failed", __func__);
714 dbg("%s - roomquery returned 0 bytes", __func__);
718 priv = usb_get_serial_port_data(port);
719 priv->tx_room = *room;
720 priv->tx_throttled = *room ? 0 : 1;
722 /*Start reading from the device*/
723 port->interrupt_in_urb->dev = serial->dev;
724 rc = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
726 dbg("%s - usb_submit_urb(read int) failed", __func__);
733 static void keyspan_pda_close(struct usb_serial_port *port)
735 struct usb_serial *serial = port->serial;
738 /* shutdown our bulk reads and writes */
739 usb_kill_urb(port->write_urb);
740 usb_kill_urb(port->interrupt_in_urb);
745 /* download the firmware to a "fake" device (pre-renumeration) */
746 static int keyspan_pda_fake_startup(struct usb_serial *serial)
750 const struct ihex_binrec *record;
751 const struct firmware *fw;
753 /* download the firmware here ... */
754 response = ezusb_set_reset(serial, 1);
758 else if (le16_to_cpu(serial->dev->descriptor.idVendor) == KEYSPAN_VENDOR_ID)
759 fw_name = "keyspan_pda/keyspan_pda.fw";
762 else if ((le16_to_cpu(serial->dev->descriptor.idVendor) == XIRCOM_VENDOR_ID) ||
763 (le16_to_cpu(serial->dev->descriptor.idVendor) == ENTREGA_VENDOR_ID))
764 fw_name = "keyspan_pda/xircom_pgs.fw";
767 dev_err(&serial->dev->dev, "%s: unknown vendor, aborting.\n",
771 if (request_ihex_firmware(&fw, fw_name, &serial->dev->dev)) {
772 dev_err(&serial->dev->dev, "failed to load firmware \"%s\"\n",
776 record = (const struct ihex_binrec *)fw->data;
779 response = ezusb_writememory(serial, be32_to_cpu(record->addr),
780 (unsigned char *)record->data,
781 be16_to_cpu(record->len), 0xa0);
783 dev_err(&serial->dev->dev, "ezusb_writememory failed "
784 "for Keyspan PDA firmware (%d %04X %p %d)\n",
785 response, be32_to_cpu(record->addr),
786 record->data, be16_to_cpu(record->len));
789 record = ihex_next_binrec(record);
791 release_firmware(fw);
792 /* bring device out of reset. Renumeration will occur in a moment
793 and the new device will bind to the real driver */
794 response = ezusb_set_reset(serial, 0);
796 /* we want this device to fail to have a driver assigned to it. */
801 MODULE_FIRMWARE("keyspan_pda/keyspan_pda.fw");
804 MODULE_FIRMWARE("keyspan_pda/xircom_pgs.fw");
807 static int keyspan_pda_startup(struct usb_serial *serial)
810 struct keyspan_pda_private *priv;
812 /* allocate the private data structures for all ports. Well, for all
815 priv = kmalloc(sizeof(struct keyspan_pda_private), GFP_KERNEL);
817 return 1; /* error */
818 usb_set_serial_port_data(serial->port[0], priv);
819 init_waitqueue_head(&serial->port[0]->write_wait);
820 INIT_WORK(&priv->wakeup_work, keyspan_pda_wakeup_write);
821 INIT_WORK(&priv->unthrottle_work, keyspan_pda_request_unthrottle);
822 priv->serial = serial;
823 priv->port = serial->port[0];
827 static void keyspan_pda_release(struct usb_serial *serial)
831 kfree(usb_get_serial_port_data(serial->port[0]));
835 static struct usb_serial_driver keyspan_pda_fake_device = {
837 .owner = THIS_MODULE,
838 .name = "keyspan_pda_pre",
840 .description = "Keyspan PDA - (prerenumeration)",
841 .usb_driver = &keyspan_pda_driver,
842 .id_table = id_table_fake,
844 .attach = keyspan_pda_fake_startup,
849 static struct usb_serial_driver xircom_pgs_fake_device = {
851 .owner = THIS_MODULE,
852 .name = "xircom_no_firm",
854 .description = "Xircom / Entrega PGS - (prerenumeration)",
855 .usb_driver = &keyspan_pda_driver,
856 .id_table = id_table_fake_xircom,
858 .attach = keyspan_pda_fake_startup,
862 static struct usb_serial_driver keyspan_pda_device = {
864 .owner = THIS_MODULE,
865 .name = "keyspan_pda",
867 .description = "Keyspan PDA",
868 .usb_driver = &keyspan_pda_driver,
869 .id_table = id_table_std,
871 .dtr_rts = keyspan_pda_dtr_rts,
872 .open = keyspan_pda_open,
873 .close = keyspan_pda_close,
874 .write = keyspan_pda_write,
875 .write_room = keyspan_pda_write_room,
876 .write_bulk_callback = keyspan_pda_write_bulk_callback,
877 .read_int_callback = keyspan_pda_rx_interrupt,
878 .chars_in_buffer = keyspan_pda_chars_in_buffer,
879 .throttle = keyspan_pda_rx_throttle,
880 .unthrottle = keyspan_pda_rx_unthrottle,
881 .set_termios = keyspan_pda_set_termios,
882 .break_ctl = keyspan_pda_break_ctl,
883 .tiocmget = keyspan_pda_tiocmget,
884 .tiocmset = keyspan_pda_tiocmset,
885 .attach = keyspan_pda_startup,
886 .release = keyspan_pda_release,
890 static int __init keyspan_pda_init(void)
893 retval = usb_serial_register(&keyspan_pda_device);
895 goto failed_pda_register;
897 retval = usb_serial_register(&keyspan_pda_fake_device);
899 goto failed_pda_fake_register;
902 retval = usb_serial_register(&xircom_pgs_fake_device);
904 goto failed_xircom_register;
906 retval = usb_register(&keyspan_pda_driver);
908 goto failed_usb_register;
909 printk(KERN_INFO KBUILD_MODNAME ": " DRIVER_VERSION ":"
914 usb_serial_deregister(&xircom_pgs_fake_device);
915 failed_xircom_register:
918 usb_serial_deregister(&keyspan_pda_fake_device);
921 failed_pda_fake_register:
923 usb_serial_deregister(&keyspan_pda_device);
929 static void __exit keyspan_pda_exit(void)
931 usb_deregister(&keyspan_pda_driver);
932 usb_serial_deregister(&keyspan_pda_device);
934 usb_serial_deregister(&keyspan_pda_fake_device);
937 usb_serial_deregister(&xircom_pgs_fake_device);
942 module_init(keyspan_pda_init);
943 module_exit(keyspan_pda_exit);
945 MODULE_AUTHOR(DRIVER_AUTHOR);
946 MODULE_DESCRIPTION(DRIVER_DESC);
947 MODULE_LICENSE("GPL");
949 module_param(debug, bool, S_IRUGO | S_IWUSR);
950 MODULE_PARM_DESC(debug, "Debug enabled or not");