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/config.h>
70 #include <linux/kernel.h>
71 #include <linux/errno.h>
72 #include <linux/init.h>
73 #include <linux/slab.h>
74 #include <linux/tty.h>
75 #include <linux/tty_driver.h>
76 #include <linux/tty_flip.h>
77 #include <linux/module.h>
78 #include <linux/spinlock.h>
79 #include <linux/workqueue.h>
80 #include <asm/uaccess.h>
81 #include <linux/usb.h>
85 struct ezusb_hex_record {
91 /* make a simple define to handle if we are compiling keyspan_pda or xircom support */
92 #if defined(CONFIG_USB_SERIAL_KEYSPAN_PDA) || defined(CONFIG_USB_SERIAL_KEYSPAN_PDA_MODULE)
97 #if defined(CONFIG_USB_SERIAL_XIRCOM) || defined(CONFIG_USB_SERIAL_XIRCOM_MODULE)
104 #include "keyspan_pda_fw.h"
108 #include "xircom_pgs_fw.h"
111 #include "usb-serial.h"
114 * Version Information
116 #define DRIVER_VERSION "v1.1"
117 #define DRIVER_AUTHOR "Brian Warner <warner@lothar.com>"
118 #define DRIVER_DESC "USB Keyspan PDA Converter driver"
120 struct keyspan_pda_private {
123 struct work_struct wakeup_work;
124 struct work_struct unthrottle_work;
128 #define KEYSPAN_VENDOR_ID 0x06cd
129 #define KEYSPAN_PDA_FAKE_ID 0x0103
130 #define KEYSPAN_PDA_ID 0x0104 /* no clue */
132 /* For Xircom PGSDB9 and older Entregra version of the same device */
133 #define XIRCOM_VENDOR_ID 0x085a
134 #define XIRCOM_FAKE_ID 0x8027
135 #define ENTREGRA_VENDOR_ID 0x1645
136 #define ENTREGRA_FAKE_ID 0x8093
138 static struct usb_device_id id_table_combined [] = {
140 { USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_FAKE_ID) },
143 { USB_DEVICE(XIRCOM_VENDOR_ID, XIRCOM_FAKE_ID) },
144 { USB_DEVICE(ENTREGRA_VENDOR_ID, ENTREGRA_FAKE_ID) },
146 { USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_ID) },
147 { } /* Terminating entry */
150 MODULE_DEVICE_TABLE (usb, id_table_combined);
152 static struct usb_driver keyspan_pda_driver = {
153 .owner = THIS_MODULE,
154 .name = "keyspan_pda",
155 .probe = usb_serial_probe,
156 .disconnect = usb_serial_disconnect,
157 .id_table = id_table_combined,
160 static struct usb_device_id id_table_std [] = {
161 { USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_ID) },
162 { } /* Terminating entry */
166 static struct usb_device_id id_table_fake [] = {
167 { USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_FAKE_ID) },
168 { } /* Terminating entry */
173 static struct usb_device_id id_table_fake_xircom [] = {
174 { USB_DEVICE(XIRCOM_VENDOR_ID, XIRCOM_FAKE_ID) },
175 { USB_DEVICE(ENTREGRA_VENDOR_ID, ENTREGRA_FAKE_ID) },
180 static void keyspan_pda_wakeup_write( struct usb_serial_port *port )
183 struct tty_struct *tty = port->tty;
185 /* wake up port processes */
186 wake_up_interruptible( &port->write_wait );
188 /* wake up line discipline */
192 static void keyspan_pda_request_unthrottle( struct usb_serial *serial )
196 dbg(" request_unthrottle");
197 /* ask the device to tell us when the tx buffer becomes
198 sufficiently empty */
199 result = usb_control_msg(serial->dev,
200 usb_sndctrlpipe(serial->dev, 0),
201 7, /* request_unthrottle */
202 USB_TYPE_VENDOR | USB_RECIP_INTERFACE
204 16, /* value: threshold */
210 dbg("%s - error %d from usb_control_msg",
211 __FUNCTION__, result);
215 static void keyspan_pda_rx_interrupt (struct urb *urb, struct pt_regs *regs)
217 struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
218 struct tty_struct *tty = port->tty;
219 unsigned char *data = urb->transfer_buffer;
222 struct keyspan_pda_private *priv;
223 priv = usb_get_serial_port_data(port);
225 switch (urb->status) {
232 /* this urb is terminated, clean up */
233 dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
236 dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status);
240 /* see if the message is data or a status interrupt */
243 /* rest of message is rx data */
244 if (urb->actual_length) {
245 for (i = 1; i < urb->actual_length ; ++i) {
246 tty_insert_flip_char(tty, data[i], 0);
248 tty_flip_buffer_push(tty);
252 /* status interrupt */
253 dbg(" rx int, d1=%d, d2=%d", data[1], data[2]);
255 case 1: /* modemline change */
257 case 2: /* tx unthrottle interrupt */
258 priv->tx_throttled = 0;
259 /* queue up a wakeup at scheduler time */
260 schedule_work(&priv->wakeup_work);
271 status = usb_submit_urb (urb, GFP_ATOMIC);
273 err ("%s - usb_submit_urb failed with result %d",
274 __FUNCTION__, status);
278 static void keyspan_pda_rx_throttle (struct usb_serial_port *port)
280 /* stop receiving characters. We just turn off the URB request, and
281 let chars pile up in the device. If we're doing hardware
282 flowcontrol, the device will signal the other end when its buffer
283 fills up. If we're doing XON/XOFF, this would be a good time to
284 send an XOFF, although it might make sense to foist that off
285 upon the device too. */
287 dbg("keyspan_pda_rx_throttle port %d", port->number);
288 usb_kill_urb(port->interrupt_in_urb);
292 static void keyspan_pda_rx_unthrottle (struct usb_serial_port *port)
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_ATOMIC))
298 dbg(" usb_submit_urb(read urb) failed");
303 static int keyspan_pda_setbaud (struct usb_serial *serial, int baud)
309 case 110: bindex = 0; break;
310 case 300: bindex = 1; break;
311 case 1200: bindex = 2; break;
312 case 2400: bindex = 3; break;
313 case 4800: bindex = 4; break;
314 case 9600: bindex = 5; break;
315 case 19200: bindex = 6; break;
316 case 38400: bindex = 7; break;
317 case 57600: bindex = 8; break;
318 case 115200: bindex = 9; break;
319 default: return -EINVAL;
322 /* rather than figure out how to sleep while waiting for this
323 to complete, I just use the "legacy" API. */
324 rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
327 | USB_RECIP_INTERFACE
328 | USB_DIR_OUT, /* type */
338 static void keyspan_pda_break_ctl (struct usb_serial_port *port, int break_state)
340 struct usb_serial *serial = port->serial;
344 if (break_state == -1)
345 value = 1; /* start break */
347 value = 0; /* clear break */
348 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
350 USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_OUT,
351 value, 0, NULL, 0, 2000);
353 dbg("%s - error %d from usb_control_msg",
354 __FUNCTION__, result);
355 /* there is something funky about this.. the TCSBRK that 'cu' performs
356 ought to translate into a break_ctl(-1),break_ctl(0) pair HZ/4
357 seconds apart, but it feels like the break sent isn't as long as it
362 static void keyspan_pda_set_termios (struct usb_serial_port *port,
363 struct termios *old_termios)
365 struct usb_serial *serial = port->serial;
366 unsigned int cflag = port->tty->termios->c_cflag;
368 /* cflag specifies lots of stuff: number of stop bits, parity, number
369 of data bits, baud. What can the device actually handle?:
370 CSTOPB (1 stop bit or 2)
373 There is minimal hw support for parity (a PSW bit seems to hold the
374 parity of whatever is in the accumulator). The UART either deals
375 with 10 bits (start, 8 data, stop) or 11 bits (start, 8 data,
376 1 special, stop). So, with firmware changes, we could do:
378 8N2: 11 bit, extra bit always (mark?)
379 8[EOMS]1: 11 bit, extra bit is parity
380 7[EOMS]1: 10 bit, b0/b7 is parity
381 7[EOMS]2: 11 bit, b0/b7 is parity, extra bit always (mark?)
383 HW flow control is dictated by the tty->termios->c_cflags & CRTSCTS
386 For now, just do baud. */
388 switch (cflag & CBAUD) {
389 /* we could support more values here, just need to calculate
390 the necessary divisors in the firmware. <asm/termbits.h>
391 has the Bnnn constants. */
392 case B110: keyspan_pda_setbaud(serial, 110); break;
393 case B300: keyspan_pda_setbaud(serial, 300); break;
394 case B1200: keyspan_pda_setbaud(serial, 1200); break;
395 case B2400: keyspan_pda_setbaud(serial, 2400); break;
396 case B4800: keyspan_pda_setbaud(serial, 4800); break;
397 case B9600: keyspan_pda_setbaud(serial, 9600); break;
398 case B19200: keyspan_pda_setbaud(serial, 19200); break;
399 case B38400: keyspan_pda_setbaud(serial, 38400); break;
400 case B57600: keyspan_pda_setbaud(serial, 57600); break;
401 case B115200: keyspan_pda_setbaud(serial, 115200); break;
402 default: dbg("can't handle requested baud rate"); break;
407 /* modem control pins: DTR and RTS are outputs and can be controlled.
408 DCD, RI, DSR, CTS are inputs and can be read. All outputs can also be
409 read. The byte passed is: DTR(b7) DCD RI DSR CTS RTS(b2) unused unused */
411 static int keyspan_pda_get_modem_info(struct usb_serial *serial,
412 unsigned char *value)
416 rc = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
418 USB_TYPE_VENDOR|USB_RECIP_INTERFACE|USB_DIR_IN,
419 0, 0, &data, 1, 2000);
426 static int keyspan_pda_set_modem_info(struct usb_serial *serial,
430 rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
432 USB_TYPE_VENDOR|USB_RECIP_INTERFACE|USB_DIR_OUT,
433 value, 0, NULL, 0, 2000);
437 static int keyspan_pda_tiocmget(struct usb_serial_port *port, struct file *file)
439 struct usb_serial *serial = port->serial;
441 unsigned char status;
444 rc = keyspan_pda_get_modem_info(serial, &status);
448 ((status & (1<<7)) ? TIOCM_DTR : 0) |
449 ((status & (1<<6)) ? TIOCM_CAR : 0) |
450 ((status & (1<<5)) ? TIOCM_RNG : 0) |
451 ((status & (1<<4)) ? TIOCM_DSR : 0) |
452 ((status & (1<<3)) ? TIOCM_CTS : 0) |
453 ((status & (1<<2)) ? TIOCM_RTS : 0);
457 static int keyspan_pda_tiocmset(struct usb_serial_port *port, struct file *file,
458 unsigned int set, unsigned int clear)
460 struct usb_serial *serial = port->serial;
462 unsigned char status;
464 rc = keyspan_pda_get_modem_info(serial, &status);
473 if (clear & TIOCM_RTS)
475 if (clear & TIOCM_DTR)
477 rc = keyspan_pda_set_modem_info(serial, status);
481 static int keyspan_pda_ioctl(struct usb_serial_port *port, struct file *file,
482 unsigned int cmd, unsigned long arg)
486 /* wait for any of the 4 modem inputs (DCD,RI,DSR,CTS)*/
489 /* return count of modemline transitions */
496 static int keyspan_pda_write(struct usb_serial_port *port,
497 const unsigned char *buf, int count)
499 struct usb_serial *serial = port->serial;
500 int request_unthrottle = 0;
502 struct keyspan_pda_private *priv;
504 priv = usb_get_serial_port_data(port);
505 /* guess how much room is left in the device's ring buffer, and if we
506 want to send more than that, check first, updating our notion of
507 what is left. If our write will result in no room left, ask the
508 device to give us an interrupt when the room available rises above
509 a threshold, and hold off all writers (eventually, those using
510 select() or poll() too) until we receive that unthrottle interrupt.
511 Block if we can't write anything at all, otherwise write as much as
513 dbg("keyspan_pda_write(%d)",count);
515 dbg(" write request of 0 bytes");
519 /* we might block because of:
520 the TX urb is in-flight (wait until it completes)
521 the device is full (wait until it says there is room)
523 if (port->write_urb->status == -EINPROGRESS || priv->tx_throttled ) {
527 /* At this point the URB is in our control, nobody else can submit it
528 again (the only sudden transition was the one from EINPROGRESS to
529 finished). Also, the tx process is not throttled. So we are
532 count = (count > port->bulk_out_size) ? port->bulk_out_size : count;
534 /* Check if we might overrun the Tx buffer. If so, ask the
535 device how much room it really has. This is done only on
536 scheduler time, since usb_control_msg() sleeps. */
537 if (count > priv->tx_room && !in_interrupt()) {
539 rc = usb_control_msg(serial->dev,
540 usb_rcvctrlpipe(serial->dev, 0),
542 USB_TYPE_VENDOR | USB_RECIP_INTERFACE
544 0, /* value: 0 means "remaining room" */
550 dbg(" roomquery failed");
554 dbg(" roomquery returned 0 bytes");
555 rc = -EIO; /* device didn't return any data */
558 dbg(" roomquery says %d", room);
559 priv->tx_room = room;
561 if (count > priv->tx_room) {
562 /* we're about to completely fill the Tx buffer, so
563 we'll be throttled afterwards. */
564 count = priv->tx_room;
565 request_unthrottle = 1;
569 /* now transfer data */
570 memcpy (port->write_urb->transfer_buffer, buf, count);
571 /* send the data out the bulk port */
572 port->write_urb->transfer_buffer_length = count;
574 priv->tx_room -= count;
576 port->write_urb->dev = port->serial->dev;
577 rc = usb_submit_urb(port->write_urb, GFP_ATOMIC);
579 dbg(" usb_submit_urb(write bulk) failed");
584 /* There wasn't any room left, so we are throttled until
585 the buffer empties a bit */
586 request_unthrottle = 1;
589 if (request_unthrottle) {
590 priv->tx_throttled = 1; /* block writers */
591 schedule_work(&priv->unthrottle_work);
600 static void keyspan_pda_write_bulk_callback (struct urb *urb, struct pt_regs *regs)
602 struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
603 struct keyspan_pda_private *priv;
605 priv = usb_get_serial_port_data(port);
607 /* queue up a wakeup at scheduler time */
608 schedule_work(&priv->wakeup_work);
612 static int keyspan_pda_write_room (struct usb_serial_port *port)
614 struct keyspan_pda_private *priv;
616 priv = usb_get_serial_port_data(port);
618 /* used by n_tty.c for processing of tabs and such. Giving it our
619 conservative guess is probably good enough, but needs testing by
620 running a console through the device. */
622 return (priv->tx_room);
626 static int keyspan_pda_chars_in_buffer (struct usb_serial_port *port)
628 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. */
634 if( port->write_urb->status == -EINPROGRESS || priv->tx_throttled )
640 static int keyspan_pda_open (struct usb_serial_port *port, struct file *filp)
642 struct usb_serial *serial = port->serial;
645 struct keyspan_pda_private *priv;
647 /* find out how much room is in the Tx ring */
648 rc = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
650 USB_TYPE_VENDOR | USB_RECIP_INTERFACE
658 dbg("%s - roomquery failed", __FUNCTION__);
662 dbg("%s - roomquery returned 0 bytes", __FUNCTION__);
666 priv = usb_get_serial_port_data(port);
667 priv->tx_room = room;
668 priv->tx_throttled = room ? 0 : 1;
670 /* the normal serial device seems to always turn on DTR and RTS here,
672 if (port->tty->termios->c_cflag & CBAUD)
673 keyspan_pda_set_modem_info(serial, (1<<7) | (1<<2) );
675 keyspan_pda_set_modem_info(serial, 0);
677 /*Start reading from the device*/
678 port->interrupt_in_urb->dev = serial->dev;
679 rc = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
681 dbg("%s - usb_submit_urb(read int) failed", __FUNCTION__);
690 static void keyspan_pda_close(struct usb_serial_port *port, struct file *filp)
692 struct usb_serial *serial = port->serial;
695 /* the normal serial device seems to always shut off DTR and RTS now */
696 if (port->tty->termios->c_cflag & HUPCL)
697 keyspan_pda_set_modem_info(serial, 0);
699 /* shutdown our bulk reads and writes */
700 usb_kill_urb(port->write_urb);
701 usb_kill_urb(port->interrupt_in_urb);
706 /* download the firmware to a "fake" device (pre-renumeration) */
707 static int keyspan_pda_fake_startup (struct usb_serial *serial)
710 const struct ezusb_hex_record *record = NULL;
712 /* download the firmware here ... */
713 response = ezusb_set_reset(serial, 1);
716 if (le16_to_cpu(serial->dev->descriptor.idVendor) == KEYSPAN_VENDOR_ID)
717 record = &keyspan_pda_firmware[0];
720 if ((le16_to_cpu(serial->dev->descriptor.idVendor) == XIRCOM_VENDOR_ID) ||
721 (le16_to_cpu(serial->dev->descriptor.idVendor) == ENTREGRA_VENDOR_ID))
722 record = &xircom_pgs_firmware[0];
724 if (record == NULL) {
725 err("%s: unknown vendor, aborting.", __FUNCTION__);
729 while(record->address != 0xffff) {
730 response = ezusb_writememory(serial, record->address,
731 (unsigned char *)record->data,
732 record->data_size, 0xa0);
734 err("ezusb_writememory failed for Keyspan PDA "
735 "firmware (%d %04X %p %d)",
737 record->address, record->data, record->data_size);
742 /* bring device out of reset. Renumeration will occur in a moment
743 and the new device will bind to the real driver */
744 response = ezusb_set_reset(serial, 0);
746 /* we want this device to fail to have a driver assigned to it. */
750 static int keyspan_pda_startup (struct usb_serial *serial)
753 struct keyspan_pda_private *priv;
755 /* allocate the private data structures for all ports. Well, for all
758 priv = kmalloc(sizeof(struct keyspan_pda_private), GFP_KERNEL);
760 return (1); /* error */
761 usb_set_serial_port_data(serial->port[0], priv);
762 init_waitqueue_head(&serial->port[0]->write_wait);
763 INIT_WORK(&priv->wakeup_work, (void *)keyspan_pda_wakeup_write,
764 (void *)(serial->port[0]));
765 INIT_WORK(&priv->unthrottle_work,
766 (void *)keyspan_pda_request_unthrottle,
771 static void keyspan_pda_shutdown (struct usb_serial *serial)
773 dbg("%s", __FUNCTION__);
775 kfree(usb_get_serial_port_data(serial->port[0]));
779 static struct usb_serial_device_type keyspan_pda_fake_device = {
780 .owner = THIS_MODULE,
781 .name = "Keyspan PDA - (prerenumeration)",
782 .short_name = "keyspan_pda_pre",
783 .id_table = id_table_fake,
784 .num_interrupt_in = NUM_DONT_CARE,
785 .num_bulk_in = NUM_DONT_CARE,
786 .num_bulk_out = NUM_DONT_CARE,
788 .attach = keyspan_pda_fake_startup,
793 static struct usb_serial_device_type xircom_pgs_fake_device = {
794 .owner = THIS_MODULE,
795 .name = "Xircom / Entregra PGS - (prerenumeration)",
796 .short_name = "xircom_no_firm",
797 .id_table = id_table_fake_xircom,
798 .num_interrupt_in = NUM_DONT_CARE,
799 .num_bulk_in = NUM_DONT_CARE,
800 .num_bulk_out = NUM_DONT_CARE,
802 .attach = keyspan_pda_fake_startup,
806 static struct usb_serial_device_type keyspan_pda_device = {
807 .owner = THIS_MODULE,
808 .name = "Keyspan PDA",
809 .short_name = "keyspan_pda",
810 .id_table = id_table_std,
811 .num_interrupt_in = 1,
815 .open = keyspan_pda_open,
816 .close = keyspan_pda_close,
817 .write = keyspan_pda_write,
818 .write_room = keyspan_pda_write_room,
819 .write_bulk_callback = keyspan_pda_write_bulk_callback,
820 .read_int_callback = keyspan_pda_rx_interrupt,
821 .chars_in_buffer = keyspan_pda_chars_in_buffer,
822 .throttle = keyspan_pda_rx_throttle,
823 .unthrottle = keyspan_pda_rx_unthrottle,
824 .ioctl = keyspan_pda_ioctl,
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");