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->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->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 usb_serial_port *port)
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. */
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 usb_serial_port *port)
285 /* just restart the receive interrupt URB */
286 dbg("keyspan_pda_rx_unthrottle port %d", port->number);
287 port->interrupt_in_urb->dev = port->serial->dev;
288 if (usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC))
289 dbg(" usb_submit_urb(read urb) failed");
294 static speed_t keyspan_pda_setbaud (struct usb_serial *serial, speed_t baud)
300 case 110: bindex = 0; break;
301 case 300: bindex = 1; break;
302 case 1200: bindex = 2; break;
303 case 2400: bindex = 3; break;
304 case 4800: bindex = 4; break;
305 case 9600: bindex = 5; break;
306 case 19200: bindex = 6; break;
307 case 38400: bindex = 7; break;
308 case 57600: bindex = 8; break;
309 case 115200: bindex = 9; break;
311 bindex = 5; /* Default to 9600 */
315 /* rather than figure out how to sleep while waiting for this
316 to complete, I just use the "legacy" API. */
317 rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
320 | USB_RECIP_INTERFACE
321 | USB_DIR_OUT, /* type */
333 static void keyspan_pda_break_ctl (struct usb_serial_port *port, int break_state)
335 struct usb_serial *serial = port->serial;
339 if (break_state == -1)
340 value = 1; /* start break */
342 value = 0; /* clear break */
343 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
345 USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_OUT,
346 value, 0, NULL, 0, 2000);
348 dbg("%s - error %d from usb_control_msg",
350 /* there is something funky about this.. the TCSBRK that 'cu' performs
351 ought to translate into a break_ctl(-1),break_ctl(0) pair HZ/4
352 seconds apart, but it feels like the break sent isn't as long as it
357 static void keyspan_pda_set_termios (struct usb_serial_port *port,
358 struct ktermios *old_termios)
360 struct usb_serial *serial = port->serial;
363 /* cflag specifies lots of stuff: number of stop bits, parity, number
364 of data bits, baud. What can the device actually handle?:
365 CSTOPB (1 stop bit or 2)
368 There is minimal hw support for parity (a PSW bit seems to hold the
369 parity of whatever is in the accumulator). The UART either deals
370 with 10 bits (start, 8 data, stop) or 11 bits (start, 8 data,
371 1 special, stop). So, with firmware changes, we could do:
373 8N2: 11 bit, extra bit always (mark?)
374 8[EOMS]1: 11 bit, extra bit is parity
375 7[EOMS]1: 10 bit, b0/b7 is parity
376 7[EOMS]2: 11 bit, b0/b7 is parity, extra bit always (mark?)
378 HW flow control is dictated by the tty->termios->c_cflags & CRTSCTS
381 For now, just do baud. */
383 speed = tty_get_baud_rate(port->tty);
384 speed = keyspan_pda_setbaud(serial, speed);
387 dbg("can't handle requested baud rate");
388 /* It hasn't changed so.. */
389 speed = tty_termios_baud_rate(old_termios);
391 /* Only speed can change so copy the old h/w parameters
392 then encode the new speed */
393 tty_termios_copy_hw(port->tty->termios, old_termios);
394 tty_encode_baud_rate(port->tty, speed, speed);
398 /* modem control pins: DTR and RTS are outputs and can be controlled.
399 DCD, RI, DSR, CTS are inputs and can be read. All outputs can also be
400 read. The byte passed is: DTR(b7) DCD RI DSR CTS RTS(b2) unused unused */
402 static int keyspan_pda_get_modem_info(struct usb_serial *serial,
403 unsigned char *value)
407 rc = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
409 USB_TYPE_VENDOR|USB_RECIP_INTERFACE|USB_DIR_IN,
410 0, 0, &data, 1, 2000);
417 static int keyspan_pda_set_modem_info(struct usb_serial *serial,
421 rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
423 USB_TYPE_VENDOR|USB_RECIP_INTERFACE|USB_DIR_OUT,
424 value, 0, NULL, 0, 2000);
428 static int keyspan_pda_tiocmget(struct usb_serial_port *port, struct file *file)
430 struct usb_serial *serial = port->serial;
432 unsigned char status;
435 rc = keyspan_pda_get_modem_info(serial, &status);
439 ((status & (1<<7)) ? TIOCM_DTR : 0) |
440 ((status & (1<<6)) ? TIOCM_CAR : 0) |
441 ((status & (1<<5)) ? TIOCM_RNG : 0) |
442 ((status & (1<<4)) ? TIOCM_DSR : 0) |
443 ((status & (1<<3)) ? TIOCM_CTS : 0) |
444 ((status & (1<<2)) ? TIOCM_RTS : 0);
448 static int keyspan_pda_tiocmset(struct usb_serial_port *port, struct file *file,
449 unsigned int set, unsigned int clear)
451 struct usb_serial *serial = port->serial;
453 unsigned char status;
455 rc = keyspan_pda_get_modem_info(serial, &status);
464 if (clear & TIOCM_RTS)
466 if (clear & TIOCM_DTR)
468 rc = keyspan_pda_set_modem_info(serial, status);
472 static int keyspan_pda_ioctl(struct usb_serial_port *port, struct file *file,
473 unsigned int cmd, unsigned long arg)
477 /* wait for any of the 4 modem inputs (DCD,RI,DSR,CTS)*/
480 /* return count of modemline transitions */
487 static int keyspan_pda_write(struct usb_serial_port *port,
488 const unsigned char *buf, int count)
490 struct usb_serial *serial = port->serial;
491 int request_unthrottle = 0;
493 struct keyspan_pda_private *priv;
495 priv = usb_get_serial_port_data(port);
496 /* guess how much room is left in the device's ring buffer, and if we
497 want to send more than that, check first, updating our notion of
498 what is left. If our write will result in no room left, ask the
499 device to give us an interrupt when the room available rises above
500 a threshold, and hold off all writers (eventually, those using
501 select() or poll() too) until we receive that unthrottle interrupt.
502 Block if we can't write anything at all, otherwise write as much as
504 dbg("keyspan_pda_write(%d)",count);
506 dbg(" write request of 0 bytes");
510 /* we might block because of:
511 the TX urb is in-flight (wait until it completes)
512 the device is full (wait until it says there is room)
514 spin_lock_bh(&port->lock);
515 if (port->write_urb_busy || priv->tx_throttled) {
516 spin_unlock_bh(&port->lock);
519 port->write_urb_busy = 1;
520 spin_unlock_bh(&port->lock);
522 /* At this point the URB is in our control, nobody else can submit it
523 again (the only sudden transition was the one from EINPROGRESS to
524 finished). Also, the tx process is not throttled. So we are
527 count = (count > port->bulk_out_size) ? port->bulk_out_size : count;
529 /* Check if we might overrun the Tx buffer. If so, ask the
530 device how much room it really has. This is done only on
531 scheduler time, since usb_control_msg() sleeps. */
532 if (count > priv->tx_room && !in_interrupt()) {
534 rc = usb_control_msg(serial->dev,
535 usb_rcvctrlpipe(serial->dev, 0),
537 USB_TYPE_VENDOR | USB_RECIP_INTERFACE
539 0, /* value: 0 means "remaining room" */
545 dbg(" roomquery failed");
549 dbg(" roomquery returned 0 bytes");
550 rc = -EIO; /* device didn't return any data */
553 dbg(" roomquery says %d", room);
554 priv->tx_room = room;
556 if (count > priv->tx_room) {
557 /* we're about to completely fill the Tx buffer, so
558 we'll be throttled afterwards. */
559 count = priv->tx_room;
560 request_unthrottle = 1;
564 /* now transfer data */
565 memcpy (port->write_urb->transfer_buffer, buf, count);
566 /* send the data out the bulk port */
567 port->write_urb->transfer_buffer_length = count;
569 priv->tx_room -= count;
571 port->write_urb->dev = port->serial->dev;
572 rc = usb_submit_urb(port->write_urb, GFP_ATOMIC);
574 dbg(" usb_submit_urb(write bulk) failed");
579 /* There wasn't any room left, so we are throttled until
580 the buffer empties a bit */
581 request_unthrottle = 1;
584 if (request_unthrottle) {
585 priv->tx_throttled = 1; /* block writers */
586 schedule_work(&priv->unthrottle_work);
592 port->write_urb_busy = 0;
597 static void keyspan_pda_write_bulk_callback (struct urb *urb)
599 struct usb_serial_port *port = urb->context;
600 struct keyspan_pda_private *priv;
602 port->write_urb_busy = 0;
603 priv = usb_get_serial_port_data(port);
605 /* queue up a wakeup at scheduler time */
606 schedule_work(&priv->wakeup_work);
610 static int keyspan_pda_write_room (struct usb_serial_port *port)
612 struct keyspan_pda_private *priv;
614 priv = usb_get_serial_port_data(port);
616 /* used by n_tty.c for processing of tabs and such. Giving it our
617 conservative guess is probably good enough, but needs testing by
618 running a console through the device. */
620 return (priv->tx_room);
624 static int keyspan_pda_chars_in_buffer (struct usb_serial_port *port)
626 struct keyspan_pda_private *priv;
630 priv = usb_get_serial_port_data(port);
632 /* when throttled, return at least WAKEUP_CHARS to tell select() (via
633 n_tty.c:normal_poll() ) that we're not writeable. */
635 spin_lock_irqsave(&port->lock, flags);
636 if (port->write_urb_busy || priv->tx_throttled)
638 spin_unlock_irqrestore(&port->lock, flags);
643 static int keyspan_pda_open (struct usb_serial_port *port, struct file *filp)
645 struct usb_serial *serial = port->serial;
648 struct keyspan_pda_private *priv;
650 /* find out how much room is in the Tx ring */
651 rc = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
653 USB_TYPE_VENDOR | USB_RECIP_INTERFACE
661 dbg("%s - roomquery failed", __func__);
665 dbg("%s - roomquery returned 0 bytes", __func__);
669 priv = usb_get_serial_port_data(port);
670 priv->tx_room = room;
671 priv->tx_throttled = room ? 0 : 1;
673 /* the normal serial device seems to always turn on DTR and RTS here,
675 if (port->tty->termios->c_cflag & CBAUD)
676 keyspan_pda_set_modem_info(serial, (1<<7) | (1<<2) );
678 keyspan_pda_set_modem_info(serial, 0);
680 /*Start reading from the device*/
681 port->interrupt_in_urb->dev = serial->dev;
682 rc = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
684 dbg("%s - usb_submit_urb(read int) failed", __func__);
693 static void keyspan_pda_close(struct usb_serial_port *port, struct file *filp)
695 struct usb_serial *serial = port->serial;
698 /* the normal serial device seems to always shut off DTR and RTS now */
699 if (port->tty->termios->c_cflag & HUPCL)
700 keyspan_pda_set_modem_info(serial, 0);
702 /* shutdown our bulk reads and writes */
703 usb_kill_urb(port->write_urb);
704 usb_kill_urb(port->interrupt_in_urb);
709 /* download the firmware to a "fake" device (pre-renumeration) */
710 static int keyspan_pda_fake_startup (struct usb_serial *serial)
714 const struct ihex_binrec *record;
715 const struct firmware *fw;
717 /* download the firmware here ... */
718 response = ezusb_set_reset(serial, 1);
722 else if (le16_to_cpu(serial->dev->descriptor.idVendor) == KEYSPAN_VENDOR_ID)
723 fw_name = "keyspan_pda/keyspan_pda.fw";
726 else if ((le16_to_cpu(serial->dev->descriptor.idVendor) == XIRCOM_VENDOR_ID) ||
727 (le16_to_cpu(serial->dev->descriptor.idVendor) == ENTREGRA_VENDOR_ID))
728 fw_name = "keyspan_pda/xircom_pgs.fw";
731 err("%s: unknown vendor, aborting.", __func__);
734 if (request_ihex_firmware(&fw, fw_name, &serial->dev->dev)) {
735 err("failed to load firmware \"%s\"\n", fw_name);
738 record = (const struct ihex_binrec *)fw->data;
741 response = ezusb_writememory(serial, be32_to_cpu(record->addr),
742 (unsigned char *)record->data,
743 be16_to_cpu(record->len), 0xa0);
745 err("ezusb_writememory failed for Keyspan PDA "
746 "firmware (%d %04X %p %d)",
747 response, be32_to_cpu(record->addr),
748 record->data, be16_to_cpu(record->len));
751 record = ihex_next_binrec(record);
753 release_firmware(fw);
754 /* bring device out of reset. Renumeration will occur in a moment
755 and the new device will bind to the real driver */
756 response = ezusb_set_reset(serial, 0);
758 /* we want this device to fail to have a driver assigned to it. */
762 static int keyspan_pda_startup (struct usb_serial *serial)
765 struct keyspan_pda_private *priv;
767 /* allocate the private data structures for all ports. Well, for all
770 priv = kmalloc(sizeof(struct keyspan_pda_private), GFP_KERNEL);
772 return (1); /* error */
773 usb_set_serial_port_data(serial->port[0], priv);
774 init_waitqueue_head(&serial->port[0]->write_wait);
775 INIT_WORK(&priv->wakeup_work, keyspan_pda_wakeup_write);
776 INIT_WORK(&priv->unthrottle_work, keyspan_pda_request_unthrottle);
777 priv->serial = serial;
778 priv->port = serial->port[0];
782 static void keyspan_pda_shutdown (struct usb_serial *serial)
786 kfree(usb_get_serial_port_data(serial->port[0]));
790 static struct usb_serial_driver keyspan_pda_fake_device = {
792 .owner = THIS_MODULE,
793 .name = "keyspan_pda_pre",
795 .description = "Keyspan PDA - (prerenumeration)",
796 .usb_driver = &keyspan_pda_driver,
797 .id_table = id_table_fake,
799 .attach = keyspan_pda_fake_startup,
804 static struct usb_serial_driver xircom_pgs_fake_device = {
806 .owner = THIS_MODULE,
807 .name = "xircom_no_firm",
809 .description = "Xircom / Entregra PGS - (prerenumeration)",
810 .usb_driver = &keyspan_pda_driver,
811 .id_table = id_table_fake_xircom,
813 .attach = keyspan_pda_fake_startup,
817 static struct usb_serial_driver keyspan_pda_device = {
819 .owner = THIS_MODULE,
820 .name = "keyspan_pda",
822 .description = "Keyspan PDA",
823 .usb_driver = &keyspan_pda_driver,
824 .id_table = id_table_std,
826 .open = keyspan_pda_open,
827 .close = keyspan_pda_close,
828 .write = keyspan_pda_write,
829 .write_room = keyspan_pda_write_room,
830 .write_bulk_callback = keyspan_pda_write_bulk_callback,
831 .read_int_callback = keyspan_pda_rx_interrupt,
832 .chars_in_buffer = keyspan_pda_chars_in_buffer,
833 .throttle = keyspan_pda_rx_throttle,
834 .unthrottle = keyspan_pda_rx_unthrottle,
835 .ioctl = keyspan_pda_ioctl,
836 .set_termios = keyspan_pda_set_termios,
837 .break_ctl = keyspan_pda_break_ctl,
838 .tiocmget = keyspan_pda_tiocmget,
839 .tiocmset = keyspan_pda_tiocmset,
840 .attach = keyspan_pda_startup,
841 .shutdown = keyspan_pda_shutdown,
845 static int __init keyspan_pda_init (void)
848 retval = usb_serial_register(&keyspan_pda_device);
850 goto failed_pda_register;
852 retval = usb_serial_register(&keyspan_pda_fake_device);
854 goto failed_pda_fake_register;
857 retval = usb_serial_register(&xircom_pgs_fake_device);
859 goto failed_xircom_register;
861 retval = usb_register(&keyspan_pda_driver);
863 goto failed_usb_register;
864 info(DRIVER_DESC " " DRIVER_VERSION);
868 usb_serial_deregister(&xircom_pgs_fake_device);
869 failed_xircom_register:
872 usb_serial_deregister(&keyspan_pda_fake_device);
875 failed_pda_fake_register:
877 usb_serial_deregister(&keyspan_pda_device);
883 static void __exit keyspan_pda_exit (void)
885 usb_deregister (&keyspan_pda_driver);
886 usb_serial_deregister (&keyspan_pda_device);
888 usb_serial_deregister (&keyspan_pda_fake_device);
891 usb_serial_deregister (&xircom_pgs_fake_device);
896 module_init(keyspan_pda_init);
897 module_exit(keyspan_pda_exit);
899 MODULE_AUTHOR( DRIVER_AUTHOR );
900 MODULE_DESCRIPTION( DRIVER_DESC );
901 MODULE_LICENSE("GPL");
903 module_param(debug, bool, S_IRUGO | S_IWUSR);
904 MODULE_PARM_DESC(debug, "Debug enabled or not");