2 * USB Keyspan PDA / Xircom / Entregra 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 driver
16 * cleaned up the Xircom support. Added ids for Entregra device which is
17 * the same as the Xircom device. Enabled the code to be compiled for
18 * either Xircom or Keyspan devices.
20 * (08/11/2001) Cristian M. Craciunescu
21 * support for Xircom PGSDB9
24 * switched from using spinlock to a semaphore, which fixes lots of problems.
27 * Identify version on module load.
29 * (11/01/2000) Adam J. Richter
30 * usb_device_id table support
33 * Fixed bug with urb->dev not being set properly, now that the usb
37 * Added locks for SMP safeness.
38 * Fixed MOD_INC and MOD_DEC logic and the ability to open a port more
41 * (07/20/2000) borchers
42 * - keyspan_pda_write no longer sleeps if it is called on interrupt time;
43 * PPP and the line discipline with stty echo on can call write on
44 * interrupt time and this would cause an oops if write slept
45 * - if keyspan_pda_write is in an interrupt, it will not call
46 * usb_control_msg (which sleeps) to query the room in the device
47 * buffer, it simply uses the current room value it has
48 * - if the urb is busy or if it is throttled keyspan_pda_write just
49 * returns 0, rather than sleeping to wait for this to change; the
50 * write_chan code in n_tty.c will sleep if needed before calling
51 * keyspan_pda_write again
52 * - if the device needs to be unthrottled, write now queues up the
53 * call to usb_control_msg (which sleeps) to unthrottle the device
54 * - the wakeups from keyspan_pda_write_bulk_callback are queued rather
55 * than done directly from the callback to avoid the race in write_chan
56 * - keyspan_pda_chars_in_buffer also indicates its buffer is full if the
57 * urb status is -EINPROGRESS, meaning it cannot write at the moment
60 * Added module_init and module_exit functions to handle the fact that this
61 * driver is a loadable module now.
64 * Split driver up into device specific pieces.
69 #include <linux/kernel.h>
70 #include <linux/errno.h>
71 #include <linux/init.h>
72 #include <linux/slab.h>
73 #include <linux/tty.h>
74 #include <linux/tty_driver.h>
75 #include <linux/tty_flip.h>
76 #include <linux/module.h>
77 #include <linux/spinlock.h>
78 #include <linux/workqueue.h>
79 #include <linux/firmware.h>
80 #include <linux/ihex.h>
81 #include <asm/uaccess.h>
82 #include <linux/usb.h>
83 #include <linux/usb/serial.h>
87 /* make a simple define to handle if we are compiling keyspan_pda or xircom support */
88 #if defined(CONFIG_USB_SERIAL_KEYSPAN_PDA) || defined(CONFIG_USB_SERIAL_KEYSPAN_PDA_MODULE)
93 #if defined(CONFIG_USB_SERIAL_XIRCOM) || defined(CONFIG_USB_SERIAL_XIRCOM_MODULE)
100 * Version Information
102 #define DRIVER_VERSION "v1.1"
103 #define DRIVER_AUTHOR "Brian Warner <warner@lothar.com>"
104 #define DRIVER_DESC "USB Keyspan PDA Converter driver"
106 struct keyspan_pda_private {
109 struct work_struct wakeup_work;
110 struct work_struct unthrottle_work;
111 struct usb_serial *serial;
112 struct usb_serial_port *port;
116 #define KEYSPAN_VENDOR_ID 0x06cd
117 #define KEYSPAN_PDA_FAKE_ID 0x0103
118 #define KEYSPAN_PDA_ID 0x0104 /* no clue */
120 /* For Xircom PGSDB9 and older Entregra version of the same device */
121 #define XIRCOM_VENDOR_ID 0x085a
122 #define XIRCOM_FAKE_ID 0x8027
123 #define ENTREGRA_VENDOR_ID 0x1645
124 #define ENTREGRA_FAKE_ID 0x8093
126 static struct usb_device_id id_table_combined [] = {
128 { USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_FAKE_ID) },
131 { USB_DEVICE(XIRCOM_VENDOR_ID, XIRCOM_FAKE_ID) },
132 { USB_DEVICE(ENTREGRA_VENDOR_ID, ENTREGRA_FAKE_ID) },
134 { USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_ID) },
135 { } /* Terminating entry */
138 MODULE_DEVICE_TABLE (usb, id_table_combined);
140 static struct usb_driver keyspan_pda_driver = {
141 .name = "keyspan_pda",
142 .probe = usb_serial_probe,
143 .disconnect = usb_serial_disconnect,
144 .id_table = id_table_combined,
148 static struct usb_device_id id_table_std [] = {
149 { USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_ID) },
150 { } /* Terminating entry */
154 static struct usb_device_id id_table_fake [] = {
155 { USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_FAKE_ID) },
156 { } /* Terminating entry */
161 static struct usb_device_id id_table_fake_xircom [] = {
162 { USB_DEVICE(XIRCOM_VENDOR_ID, XIRCOM_FAKE_ID) },
163 { USB_DEVICE(ENTREGRA_VENDOR_ID, ENTREGRA_FAKE_ID) },
168 static void keyspan_pda_wakeup_write(struct work_struct *work)
170 struct keyspan_pda_private *priv =
171 container_of(work, struct keyspan_pda_private, wakeup_work);
172 struct usb_serial_port *port = priv->port;
174 tty_wakeup(port->port.tty);
177 static void keyspan_pda_request_unthrottle(struct work_struct *work)
179 struct keyspan_pda_private *priv =
180 container_of(work, struct keyspan_pda_private, unthrottle_work);
181 struct usb_serial *serial = priv->serial;
184 dbg(" request_unthrottle");
185 /* ask the device to tell us when the tx buffer becomes
186 sufficiently empty */
187 result = usb_control_msg(serial->dev,
188 usb_sndctrlpipe(serial->dev, 0),
189 7, /* request_unthrottle */
190 USB_TYPE_VENDOR | USB_RECIP_INTERFACE
192 16, /* value: threshold */
198 dbg("%s - error %d from usb_control_msg",
203 static void keyspan_pda_rx_interrupt (struct urb *urb)
205 struct usb_serial_port *port = urb->context;
206 struct tty_struct *tty = port->port.tty;
207 unsigned char *data = urb->transfer_buffer;
210 int status = urb->status;
211 struct keyspan_pda_private *priv;
212 priv = usb_get_serial_port_data(port);
221 /* this urb is terminated, clean up */
222 dbg("%s - urb shutting down with status: %d",
226 dbg("%s - nonzero urb status received: %d",
231 /* see if the message is data or a status interrupt */
234 /* rest of message is rx data */
235 if (urb->actual_length) {
236 for (i = 1; i < urb->actual_length ; ++i) {
237 tty_insert_flip_char(tty, data[i], 0);
239 tty_flip_buffer_push(tty);
243 /* status interrupt */
244 dbg(" rx int, d1=%d, d2=%d", data[1], data[2]);
246 case 1: /* modemline change */
248 case 2: /* tx unthrottle interrupt */
249 priv->tx_throttled = 0;
250 /* queue up a wakeup at scheduler time */
251 schedule_work(&priv->wakeup_work);
262 retval = usb_submit_urb (urb, GFP_ATOMIC);
264 err ("%s - usb_submit_urb failed with result %d",
269 static void keyspan_pda_rx_throttle(struct tty_struct *tty)
271 /* stop receiving characters. We just turn off the URB request, and
272 let chars pile up in the device. If we're doing hardware
273 flowcontrol, the device will signal the other end when its buffer
274 fills up. If we're doing XON/XOFF, this would be a good time to
275 send an XOFF, although it might make sense to foist that off
276 upon the device too. */
277 struct usb_serial_port *port = tty->driver_data;
278 dbg("keyspan_pda_rx_throttle port %d", port->number);
279 usb_kill_urb(port->interrupt_in_urb);
283 static void keyspan_pda_rx_unthrottle(struct tty_struct *tty)
285 struct usb_serial_port *port = tty->driver_data;
286 /* just restart the receive interrupt URB */
287 dbg("keyspan_pda_rx_unthrottle port %d", port->number);
288 port->interrupt_in_urb->dev = port->serial->dev;
289 if (usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC))
290 dbg(" usb_submit_urb(read urb) failed");
295 static speed_t keyspan_pda_setbaud (struct usb_serial *serial, speed_t baud)
301 case 110: bindex = 0; break;
302 case 300: bindex = 1; break;
303 case 1200: bindex = 2; break;
304 case 2400: bindex = 3; break;
305 case 4800: bindex = 4; break;
306 case 9600: bindex = 5; break;
307 case 19200: bindex = 6; break;
308 case 38400: bindex = 7; break;
309 case 57600: bindex = 8; break;
310 case 115200: bindex = 9; break;
312 bindex = 5; /* Default to 9600 */
316 /* rather than figure out how to sleep while waiting for this
317 to complete, I just use the "legacy" API. */
318 rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
321 | USB_RECIP_INTERFACE
322 | USB_DIR_OUT, /* type */
334 static void keyspan_pda_break_ctl(struct tty_struct *tty, int break_state)
336 struct usb_serial_port *port = tty->driver_data;
337 struct usb_serial *serial = port->serial;
341 if (break_state == -1)
342 value = 1; /* start break */
344 value = 0; /* clear break */
345 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
347 USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_OUT,
348 value, 0, NULL, 0, 2000);
350 dbg("%s - error %d from usb_control_msg",
352 /* there is something funky about this.. the TCSBRK that 'cu' performs
353 ought to translate into a break_ctl(-1),break_ctl(0) pair HZ/4
354 seconds apart, but it feels like the break sent isn't as long as it
359 static void keyspan_pda_set_termios(struct tty_struct *tty,
360 struct usb_serial_port *port, struct ktermios *old_termios)
362 struct usb_serial *serial = port->serial;
365 /* cflag specifies lots of stuff: number of stop bits, parity, number
366 of data bits, baud. What can the device actually handle?:
367 CSTOPB (1 stop bit or 2)
370 There is minimal hw support for parity (a PSW bit seems to hold the
371 parity of whatever is in the accumulator). The UART either deals
372 with 10 bits (start, 8 data, stop) or 11 bits (start, 8 data,
373 1 special, stop). So, with firmware changes, we could do:
375 8N2: 11 bit, extra bit always (mark?)
376 8[EOMS]1: 11 bit, extra bit is parity
377 7[EOMS]1: 10 bit, b0/b7 is parity
378 7[EOMS]2: 11 bit, b0/b7 is parity, extra bit always (mark?)
380 HW flow control is dictated by the tty->termios->c_cflags & CRTSCTS
383 For now, just do baud. */
385 speed = tty_get_baud_rate(tty);
386 speed = keyspan_pda_setbaud(serial, speed);
389 dbg("can't handle requested baud rate");
390 /* It hasn't changed so.. */
391 speed = tty_termios_baud_rate(old_termios);
393 /* Only speed can change so copy the old h/w parameters
394 then encode the new speed */
395 tty_termios_copy_hw(tty->termios, old_termios);
396 tty_encode_baud_rate(tty, speed, speed);
400 /* modem control pins: DTR and RTS are outputs and can be controlled.
401 DCD, RI, DSR, CTS are inputs and can be read. All outputs can also be
402 read. The byte passed is: DTR(b7) DCD RI DSR CTS RTS(b2) unused unused */
404 static int keyspan_pda_get_modem_info(struct usb_serial *serial,
405 unsigned char *value)
409 rc = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
411 USB_TYPE_VENDOR|USB_RECIP_INTERFACE|USB_DIR_IN,
412 0, 0, &data, 1, 2000);
419 static int keyspan_pda_set_modem_info(struct usb_serial *serial,
423 rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
425 USB_TYPE_VENDOR|USB_RECIP_INTERFACE|USB_DIR_OUT,
426 value, 0, NULL, 0, 2000);
430 static int keyspan_pda_tiocmget(struct tty_struct *tty, struct file *file)
432 struct usb_serial_port *port = tty->driver_data;
433 struct usb_serial *serial = port->serial;
435 unsigned char status;
438 rc = keyspan_pda_get_modem_info(serial, &status);
442 ((status & (1<<7)) ? TIOCM_DTR : 0) |
443 ((status & (1<<6)) ? TIOCM_CAR : 0) |
444 ((status & (1<<5)) ? TIOCM_RNG : 0) |
445 ((status & (1<<4)) ? TIOCM_DSR : 0) |
446 ((status & (1<<3)) ? TIOCM_CTS : 0) |
447 ((status & (1<<2)) ? TIOCM_RTS : 0);
451 static int keyspan_pda_tiocmset(struct tty_struct *tty, struct file *file,
452 unsigned int set, unsigned int clear)
454 struct usb_serial_port *port = tty->driver_data;
455 struct usb_serial *serial = port->serial;
457 unsigned char status;
459 rc = keyspan_pda_get_modem_info(serial, &status);
468 if (clear & TIOCM_RTS)
470 if (clear & TIOCM_DTR)
472 rc = keyspan_pda_set_modem_info(serial, status);
476 static int keyspan_pda_write(struct tty_struct *tty,
477 struct usb_serial_port *port, const unsigned char *buf, int count)
479 struct usb_serial *serial = port->serial;
480 int request_unthrottle = 0;
482 struct keyspan_pda_private *priv;
484 priv = usb_get_serial_port_data(port);
485 /* guess how much room is left in the device's ring buffer, and if we
486 want to send more than that, check first, updating our notion of
487 what is left. If our write will result in no room left, ask the
488 device to give us an interrupt when the room available rises above
489 a threshold, and hold off all writers (eventually, those using
490 select() or poll() too) until we receive that unthrottle interrupt.
491 Block if we can't write anything at all, otherwise write as much as
493 dbg("keyspan_pda_write(%d)",count);
495 dbg(" write request of 0 bytes");
499 /* we might block because of:
500 the TX urb is in-flight (wait until it completes)
501 the device is full (wait until it says there is room)
503 spin_lock_bh(&port->lock);
504 if (port->write_urb_busy || priv->tx_throttled) {
505 spin_unlock_bh(&port->lock);
508 port->write_urb_busy = 1;
509 spin_unlock_bh(&port->lock);
511 /* At this point the URB is in our control, nobody else can submit it
512 again (the only sudden transition was the one from EINPROGRESS to
513 finished). Also, the tx process is not throttled. So we are
516 count = (count > port->bulk_out_size) ? port->bulk_out_size : count;
518 /* Check if we might overrun the Tx buffer. If so, ask the
519 device how much room it really has. This is done only on
520 scheduler time, since usb_control_msg() sleeps. */
521 if (count > priv->tx_room && !in_interrupt()) {
523 rc = usb_control_msg(serial->dev,
524 usb_rcvctrlpipe(serial->dev, 0),
526 USB_TYPE_VENDOR | USB_RECIP_INTERFACE
528 0, /* value: 0 means "remaining room" */
534 dbg(" roomquery failed");
538 dbg(" roomquery returned 0 bytes");
539 rc = -EIO; /* device didn't return any data */
542 dbg(" roomquery says %d", room);
543 priv->tx_room = room;
545 if (count > priv->tx_room) {
546 /* we're about to completely fill the Tx buffer, so
547 we'll be throttled afterwards. */
548 count = priv->tx_room;
549 request_unthrottle = 1;
553 /* now transfer data */
554 memcpy (port->write_urb->transfer_buffer, buf, count);
555 /* send the data out the bulk port */
556 port->write_urb->transfer_buffer_length = count;
558 priv->tx_room -= count;
560 port->write_urb->dev = port->serial->dev;
561 rc = usb_submit_urb(port->write_urb, GFP_ATOMIC);
563 dbg(" usb_submit_urb(write bulk) failed");
568 /* There wasn't any room left, so we are throttled until
569 the buffer empties a bit */
570 request_unthrottle = 1;
573 if (request_unthrottle) {
574 priv->tx_throttled = 1; /* block writers */
575 schedule_work(&priv->unthrottle_work);
581 port->write_urb_busy = 0;
586 static void keyspan_pda_write_bulk_callback (struct urb *urb)
588 struct usb_serial_port *port = urb->context;
589 struct keyspan_pda_private *priv;
591 port->write_urb_busy = 0;
592 priv = usb_get_serial_port_data(port);
594 /* queue up a wakeup at scheduler time */
595 schedule_work(&priv->wakeup_work);
599 static int keyspan_pda_write_room(struct tty_struct *tty)
601 struct usb_serial_port *port = tty->driver_data;
602 struct keyspan_pda_private *priv;
603 priv = usb_get_serial_port_data(port);
604 /* used by n_tty.c for processing of tabs and such. Giving it our
605 conservative guess is probably good enough, but needs testing by
606 running a console through the device. */
607 return (priv->tx_room);
611 static int keyspan_pda_chars_in_buffer(struct tty_struct *tty)
613 struct usb_serial_port *port = tty->driver_data;
614 struct keyspan_pda_private *priv;
618 priv = usb_get_serial_port_data(port);
620 /* when throttled, return at least WAKEUP_CHARS to tell select() (via
621 n_tty.c:normal_poll() ) that we're not writeable. */
623 spin_lock_irqsave(&port->lock, flags);
624 if (port->write_urb_busy || priv->tx_throttled)
626 spin_unlock_irqrestore(&port->lock, flags);
631 static int keyspan_pda_open(struct tty_struct *tty,
632 struct usb_serial_port *port, struct file *filp)
634 struct usb_serial *serial = port->serial;
637 struct keyspan_pda_private *priv;
639 /* find out how much room is in the Tx ring */
640 rc = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
642 USB_TYPE_VENDOR | USB_RECIP_INTERFACE
650 dbg("%s - roomquery failed", __func__);
654 dbg("%s - roomquery returned 0 bytes", __func__);
658 priv = usb_get_serial_port_data(port);
659 priv->tx_room = room;
660 priv->tx_throttled = room ? 0 : 1;
662 /* the normal serial device seems to always turn on DTR and RTS here,
664 if (tty && (tty->termios->c_cflag & CBAUD))
665 keyspan_pda_set_modem_info(serial, (1<<7) | (1<<2) );
667 keyspan_pda_set_modem_info(serial, 0);
669 /*Start reading from the device*/
670 port->interrupt_in_urb->dev = serial->dev;
671 rc = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
673 dbg("%s - usb_submit_urb(read int) failed", __func__);
682 static void keyspan_pda_close(struct tty_struct *tty,
683 struct usb_serial_port *port, struct file *filp)
685 struct usb_serial *serial = port->serial;
688 /* the normal serial device seems to always shut off DTR and RTS now */
689 if (tty->termios->c_cflag & HUPCL)
690 keyspan_pda_set_modem_info(serial, 0);
692 /* shutdown our bulk reads and writes */
693 usb_kill_urb(port->write_urb);
694 usb_kill_urb(port->interrupt_in_urb);
699 /* download the firmware to a "fake" device (pre-renumeration) */
700 static int keyspan_pda_fake_startup (struct usb_serial *serial)
704 const struct ihex_binrec *record;
705 const struct firmware *fw;
707 /* download the firmware here ... */
708 response = ezusb_set_reset(serial, 1);
712 else if (le16_to_cpu(serial->dev->descriptor.idVendor) == KEYSPAN_VENDOR_ID)
713 fw_name = "keyspan_pda/keyspan_pda.fw";
716 else if ((le16_to_cpu(serial->dev->descriptor.idVendor) == XIRCOM_VENDOR_ID) ||
717 (le16_to_cpu(serial->dev->descriptor.idVendor) == ENTREGRA_VENDOR_ID))
718 fw_name = "keyspan_pda/xircom_pgs.fw";
721 err("%s: unknown vendor, aborting.", __func__);
724 if (request_ihex_firmware(&fw, fw_name, &serial->dev->dev)) {
725 err("failed to load firmware \"%s\"\n", fw_name);
728 record = (const struct ihex_binrec *)fw->data;
731 response = ezusb_writememory(serial, be32_to_cpu(record->addr),
732 (unsigned char *)record->data,
733 be16_to_cpu(record->len), 0xa0);
735 err("ezusb_writememory failed for Keyspan PDA "
736 "firmware (%d %04X %p %d)",
737 response, be32_to_cpu(record->addr),
738 record->data, be16_to_cpu(record->len));
741 record = ihex_next_binrec(record);
743 release_firmware(fw);
744 /* bring device out of reset. Renumeration will occur in a moment
745 and the new device will bind to the real driver */
746 response = ezusb_set_reset(serial, 0);
748 /* we want this device to fail to have a driver assigned to it. */
752 static int keyspan_pda_startup (struct usb_serial *serial)
755 struct keyspan_pda_private *priv;
757 /* allocate the private data structures for all ports. Well, for all
760 priv = kmalloc(sizeof(struct keyspan_pda_private), GFP_KERNEL);
762 return (1); /* error */
763 usb_set_serial_port_data(serial->port[0], priv);
764 init_waitqueue_head(&serial->port[0]->write_wait);
765 INIT_WORK(&priv->wakeup_work, keyspan_pda_wakeup_write);
766 INIT_WORK(&priv->unthrottle_work, keyspan_pda_request_unthrottle);
767 priv->serial = serial;
768 priv->port = serial->port[0];
772 static void keyspan_pda_shutdown (struct usb_serial *serial)
776 kfree(usb_get_serial_port_data(serial->port[0]));
780 static struct usb_serial_driver keyspan_pda_fake_device = {
782 .owner = THIS_MODULE,
783 .name = "keyspan_pda_pre",
785 .description = "Keyspan PDA - (prerenumeration)",
786 .usb_driver = &keyspan_pda_driver,
787 .id_table = id_table_fake,
789 .attach = keyspan_pda_fake_startup,
794 static struct usb_serial_driver xircom_pgs_fake_device = {
796 .owner = THIS_MODULE,
797 .name = "xircom_no_firm",
799 .description = "Xircom / Entregra PGS - (prerenumeration)",
800 .usb_driver = &keyspan_pda_driver,
801 .id_table = id_table_fake_xircom,
803 .attach = keyspan_pda_fake_startup,
807 static struct usb_serial_driver keyspan_pda_device = {
809 .owner = THIS_MODULE,
810 .name = "keyspan_pda",
812 .description = "Keyspan PDA",
813 .usb_driver = &keyspan_pda_driver,
814 .id_table = id_table_std,
816 .open = keyspan_pda_open,
817 .close = keyspan_pda_close,
818 .write = keyspan_pda_write,
819 .write_room = keyspan_pda_write_room,
820 .write_bulk_callback = keyspan_pda_write_bulk_callback,
821 .read_int_callback = keyspan_pda_rx_interrupt,
822 .chars_in_buffer = keyspan_pda_chars_in_buffer,
823 .throttle = keyspan_pda_rx_throttle,
824 .unthrottle = keyspan_pda_rx_unthrottle,
825 .set_termios = keyspan_pda_set_termios,
826 .break_ctl = keyspan_pda_break_ctl,
827 .tiocmget = keyspan_pda_tiocmget,
828 .tiocmset = keyspan_pda_tiocmset,
829 .attach = keyspan_pda_startup,
830 .shutdown = keyspan_pda_shutdown,
834 static int __init keyspan_pda_init (void)
837 retval = usb_serial_register(&keyspan_pda_device);
839 goto failed_pda_register;
841 retval = usb_serial_register(&keyspan_pda_fake_device);
843 goto failed_pda_fake_register;
846 retval = usb_serial_register(&xircom_pgs_fake_device);
848 goto failed_xircom_register;
850 retval = usb_register(&keyspan_pda_driver);
852 goto failed_usb_register;
853 info(DRIVER_DESC " " DRIVER_VERSION);
857 usb_serial_deregister(&xircom_pgs_fake_device);
858 failed_xircom_register:
861 usb_serial_deregister(&keyspan_pda_fake_device);
864 failed_pda_fake_register:
866 usb_serial_deregister(&keyspan_pda_device);
872 static void __exit keyspan_pda_exit (void)
874 usb_deregister (&keyspan_pda_driver);
875 usb_serial_deregister (&keyspan_pda_device);
877 usb_serial_deregister (&keyspan_pda_fake_device);
880 usb_serial_deregister (&xircom_pgs_fake_device);
885 module_init(keyspan_pda_init);
886 module_exit(keyspan_pda_exit);
888 MODULE_AUTHOR( DRIVER_AUTHOR );
889 MODULE_DESCRIPTION( DRIVER_DESC );
890 MODULE_LICENSE("GPL");
892 module_param(debug, bool, S_IRUGO | S_IWUSR);
893 MODULE_PARM_DESC(debug, "Debug enabled or not");