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 <asm/uaccess.h>
80 #include <linux/usb.h>
81 #include <linux/usb/serial.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"
112 * Version Information
114 #define DRIVER_VERSION "v1.1"
115 #define DRIVER_AUTHOR "Brian Warner <warner@lothar.com>"
116 #define DRIVER_DESC "USB Keyspan PDA Converter driver"
118 struct keyspan_pda_private {
121 struct work_struct wakeup_work;
122 struct work_struct unthrottle_work;
126 #define KEYSPAN_VENDOR_ID 0x06cd
127 #define KEYSPAN_PDA_FAKE_ID 0x0103
128 #define KEYSPAN_PDA_ID 0x0104 /* no clue */
130 /* For Xircom PGSDB9 and older Entregra version of the same device */
131 #define XIRCOM_VENDOR_ID 0x085a
132 #define XIRCOM_FAKE_ID 0x8027
133 #define ENTREGRA_VENDOR_ID 0x1645
134 #define ENTREGRA_FAKE_ID 0x8093
136 static struct usb_device_id id_table_combined [] = {
138 { USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_FAKE_ID) },
141 { USB_DEVICE(XIRCOM_VENDOR_ID, XIRCOM_FAKE_ID) },
142 { USB_DEVICE(ENTREGRA_VENDOR_ID, ENTREGRA_FAKE_ID) },
144 { USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_ID) },
145 { } /* Terminating entry */
148 MODULE_DEVICE_TABLE (usb, id_table_combined);
150 static struct usb_driver keyspan_pda_driver = {
151 .name = "keyspan_pda",
152 .probe = usb_serial_probe,
153 .disconnect = usb_serial_disconnect,
154 .id_table = id_table_combined,
158 static struct usb_device_id id_table_std [] = {
159 { USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_ID) },
160 { } /* Terminating entry */
164 static struct usb_device_id id_table_fake [] = {
165 { USB_DEVICE(KEYSPAN_VENDOR_ID, KEYSPAN_PDA_FAKE_ID) },
166 { } /* Terminating entry */
171 static struct usb_device_id id_table_fake_xircom [] = {
172 { USB_DEVICE(XIRCOM_VENDOR_ID, XIRCOM_FAKE_ID) },
173 { USB_DEVICE(ENTREGRA_VENDOR_ID, ENTREGRA_FAKE_ID) },
178 static void keyspan_pda_wakeup_write( struct usb_serial_port *port )
181 struct tty_struct *tty = port->tty;
183 /* wake up port processes */
184 wake_up_interruptible( &port->write_wait );
186 /* wake up line discipline */
190 static void keyspan_pda_request_unthrottle( struct usb_serial *serial )
194 dbg(" request_unthrottle");
195 /* ask the device to tell us when the tx buffer becomes
196 sufficiently empty */
197 result = usb_control_msg(serial->dev,
198 usb_sndctrlpipe(serial->dev, 0),
199 7, /* request_unthrottle */
200 USB_TYPE_VENDOR | USB_RECIP_INTERFACE
202 16, /* value: threshold */
208 dbg("%s - error %d from usb_control_msg",
209 __FUNCTION__, result);
213 static void keyspan_pda_rx_interrupt (struct urb *urb, struct pt_regs *regs)
215 struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
216 struct tty_struct *tty = port->tty;
217 unsigned char *data = urb->transfer_buffer;
220 struct keyspan_pda_private *priv;
221 priv = usb_get_serial_port_data(port);
223 switch (urb->status) {
230 /* this urb is terminated, clean up */
231 dbg("%s - urb shutting down with status: %d", __FUNCTION__, urb->status);
234 dbg("%s - nonzero urb status received: %d", __FUNCTION__, urb->status);
238 /* see if the message is data or a status interrupt */
241 /* rest of message is rx data */
242 if (urb->actual_length) {
243 for (i = 1; i < urb->actual_length ; ++i) {
244 tty_insert_flip_char(tty, data[i], 0);
246 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 status = usb_submit_urb (urb, GFP_ATOMIC);
271 err ("%s - usb_submit_urb failed with result %d",
272 __FUNCTION__, status);
276 static void keyspan_pda_rx_throttle (struct usb_serial_port *port)
278 /* stop receiving characters. We just turn off the URB request, and
279 let chars pile up in the device. If we're doing hardware
280 flowcontrol, the device will signal the other end when its buffer
281 fills up. If we're doing XON/XOFF, this would be a good time to
282 send an XOFF, although it might make sense to foist that off
283 upon the device too. */
285 dbg("keyspan_pda_rx_throttle port %d", port->number);
286 usb_kill_urb(port->interrupt_in_urb);
290 static void keyspan_pda_rx_unthrottle (struct usb_serial_port *port)
292 /* just restart the receive interrupt URB */
293 dbg("keyspan_pda_rx_unthrottle port %d", port->number);
294 port->interrupt_in_urb->dev = port->serial->dev;
295 if (usb_submit_urb(port->interrupt_in_urb, GFP_ATOMIC))
296 dbg(" usb_submit_urb(read urb) failed");
301 static int keyspan_pda_setbaud (struct usb_serial *serial, int baud)
307 case 110: bindex = 0; break;
308 case 300: bindex = 1; break;
309 case 1200: bindex = 2; break;
310 case 2400: bindex = 3; break;
311 case 4800: bindex = 4; break;
312 case 9600: bindex = 5; break;
313 case 19200: bindex = 6; break;
314 case 38400: bindex = 7; break;
315 case 57600: bindex = 8; break;
316 case 115200: bindex = 9; break;
317 default: return -EINVAL;
320 /* rather than figure out how to sleep while waiting for this
321 to complete, I just use the "legacy" API. */
322 rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
325 | USB_RECIP_INTERFACE
326 | USB_DIR_OUT, /* type */
336 static void keyspan_pda_break_ctl (struct usb_serial_port *port, int break_state)
338 struct usb_serial *serial = port->serial;
342 if (break_state == -1)
343 value = 1; /* start break */
345 value = 0; /* clear break */
346 result = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
348 USB_TYPE_VENDOR | USB_RECIP_INTERFACE | USB_DIR_OUT,
349 value, 0, NULL, 0, 2000);
351 dbg("%s - error %d from usb_control_msg",
352 __FUNCTION__, result);
353 /* there is something funky about this.. the TCSBRK that 'cu' performs
354 ought to translate into a break_ctl(-1),break_ctl(0) pair HZ/4
355 seconds apart, but it feels like the break sent isn't as long as it
360 static void keyspan_pda_set_termios (struct usb_serial_port *port,
361 struct termios *old_termios)
363 struct usb_serial *serial = port->serial;
364 unsigned int cflag = port->tty->termios->c_cflag;
366 /* cflag specifies lots of stuff: number of stop bits, parity, number
367 of data bits, baud. What can the device actually handle?:
368 CSTOPB (1 stop bit or 2)
371 There is minimal hw support for parity (a PSW bit seems to hold the
372 parity of whatever is in the accumulator). The UART either deals
373 with 10 bits (start, 8 data, stop) or 11 bits (start, 8 data,
374 1 special, stop). So, with firmware changes, we could do:
376 8N2: 11 bit, extra bit always (mark?)
377 8[EOMS]1: 11 bit, extra bit is parity
378 7[EOMS]1: 10 bit, b0/b7 is parity
379 7[EOMS]2: 11 bit, b0/b7 is parity, extra bit always (mark?)
381 HW flow control is dictated by the tty->termios->c_cflags & CRTSCTS
384 For now, just do baud. */
386 switch (cflag & CBAUD) {
387 /* we could support more values here, just need to calculate
388 the necessary divisors in the firmware. <asm/termbits.h>
389 has the Bnnn constants. */
390 case B110: keyspan_pda_setbaud(serial, 110); break;
391 case B300: keyspan_pda_setbaud(serial, 300); break;
392 case B1200: keyspan_pda_setbaud(serial, 1200); break;
393 case B2400: keyspan_pda_setbaud(serial, 2400); break;
394 case B4800: keyspan_pda_setbaud(serial, 4800); break;
395 case B9600: keyspan_pda_setbaud(serial, 9600); break;
396 case B19200: keyspan_pda_setbaud(serial, 19200); break;
397 case B38400: keyspan_pda_setbaud(serial, 38400); break;
398 case B57600: keyspan_pda_setbaud(serial, 57600); break;
399 case B115200: keyspan_pda_setbaud(serial, 115200); break;
400 default: dbg("can't handle requested baud rate"); break;
405 /* modem control pins: DTR and RTS are outputs and can be controlled.
406 DCD, RI, DSR, CTS are inputs and can be read. All outputs can also be
407 read. The byte passed is: DTR(b7) DCD RI DSR CTS RTS(b2) unused unused */
409 static int keyspan_pda_get_modem_info(struct usb_serial *serial,
410 unsigned char *value)
414 rc = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
416 USB_TYPE_VENDOR|USB_RECIP_INTERFACE|USB_DIR_IN,
417 0, 0, &data, 1, 2000);
424 static int keyspan_pda_set_modem_info(struct usb_serial *serial,
428 rc = usb_control_msg(serial->dev, usb_sndctrlpipe(serial->dev, 0),
430 USB_TYPE_VENDOR|USB_RECIP_INTERFACE|USB_DIR_OUT,
431 value, 0, NULL, 0, 2000);
435 static int keyspan_pda_tiocmget(struct usb_serial_port *port, struct file *file)
437 struct usb_serial *serial = port->serial;
439 unsigned char status;
442 rc = keyspan_pda_get_modem_info(serial, &status);
446 ((status & (1<<7)) ? TIOCM_DTR : 0) |
447 ((status & (1<<6)) ? TIOCM_CAR : 0) |
448 ((status & (1<<5)) ? TIOCM_RNG : 0) |
449 ((status & (1<<4)) ? TIOCM_DSR : 0) |
450 ((status & (1<<3)) ? TIOCM_CTS : 0) |
451 ((status & (1<<2)) ? TIOCM_RTS : 0);
455 static int keyspan_pda_tiocmset(struct usb_serial_port *port, struct file *file,
456 unsigned int set, unsigned int clear)
458 struct usb_serial *serial = port->serial;
460 unsigned char status;
462 rc = keyspan_pda_get_modem_info(serial, &status);
471 if (clear & TIOCM_RTS)
473 if (clear & TIOCM_DTR)
475 rc = keyspan_pda_set_modem_info(serial, status);
479 static int keyspan_pda_ioctl(struct usb_serial_port *port, struct file *file,
480 unsigned int cmd, unsigned long arg)
484 /* wait for any of the 4 modem inputs (DCD,RI,DSR,CTS)*/
487 /* return count of modemline transitions */
494 static int keyspan_pda_write(struct usb_serial_port *port,
495 const unsigned char *buf, int count)
497 struct usb_serial *serial = port->serial;
498 int request_unthrottle = 0;
500 struct keyspan_pda_private *priv;
502 priv = usb_get_serial_port_data(port);
503 /* guess how much room is left in the device's ring buffer, and if we
504 want to send more than that, check first, updating our notion of
505 what is left. If our write will result in no room left, ask the
506 device to give us an interrupt when the room available rises above
507 a threshold, and hold off all writers (eventually, those using
508 select() or poll() too) until we receive that unthrottle interrupt.
509 Block if we can't write anything at all, otherwise write as much as
511 dbg("keyspan_pda_write(%d)",count);
513 dbg(" write request of 0 bytes");
517 /* we might block because of:
518 the TX urb is in-flight (wait until it completes)
519 the device is full (wait until it says there is room)
521 spin_lock(&port->lock);
522 if (port->write_urb_busy || priv->tx_throttled) {
523 spin_unlock(&port->lock);
526 port->write_urb_busy = 1;
527 spin_unlock(&port->lock);
529 /* At this point the URB is in our control, nobody else can submit it
530 again (the only sudden transition was the one from EINPROGRESS to
531 finished). Also, the tx process is not throttled. So we are
534 count = (count > port->bulk_out_size) ? port->bulk_out_size : count;
536 /* Check if we might overrun the Tx buffer. If so, ask the
537 device how much room it really has. This is done only on
538 scheduler time, since usb_control_msg() sleeps. */
539 if (count > priv->tx_room && !in_interrupt()) {
541 rc = usb_control_msg(serial->dev,
542 usb_rcvctrlpipe(serial->dev, 0),
544 USB_TYPE_VENDOR | USB_RECIP_INTERFACE
546 0, /* value: 0 means "remaining room" */
552 dbg(" roomquery failed");
556 dbg(" roomquery returned 0 bytes");
557 rc = -EIO; /* device didn't return any data */
560 dbg(" roomquery says %d", room);
561 priv->tx_room = room;
563 if (count > priv->tx_room) {
564 /* we're about to completely fill the Tx buffer, so
565 we'll be throttled afterwards. */
566 count = priv->tx_room;
567 request_unthrottle = 1;
571 /* now transfer data */
572 memcpy (port->write_urb->transfer_buffer, buf, count);
573 /* send the data out the bulk port */
574 port->write_urb->transfer_buffer_length = count;
576 priv->tx_room -= count;
578 port->write_urb->dev = port->serial->dev;
579 rc = usb_submit_urb(port->write_urb, GFP_ATOMIC);
581 dbg(" usb_submit_urb(write bulk) failed");
586 /* There wasn't any room left, so we are throttled until
587 the buffer empties a bit */
588 request_unthrottle = 1;
591 if (request_unthrottle) {
592 priv->tx_throttled = 1; /* block writers */
593 schedule_work(&priv->unthrottle_work);
599 port->write_urb_busy = 0;
604 static void keyspan_pda_write_bulk_callback (struct urb *urb, struct pt_regs *regs)
606 struct usb_serial_port *port = (struct usb_serial_port *)urb->context;
607 struct keyspan_pda_private *priv;
609 port->write_urb_busy = 0;
610 priv = usb_get_serial_port_data(port);
612 /* queue up a wakeup at scheduler time */
613 schedule_work(&priv->wakeup_work);
617 static int keyspan_pda_write_room (struct usb_serial_port *port)
619 struct keyspan_pda_private *priv;
621 priv = usb_get_serial_port_data(port);
623 /* used by n_tty.c for processing of tabs and such. Giving it our
624 conservative guess is probably good enough, but needs testing by
625 running a console through the device. */
627 return (priv->tx_room);
631 static int keyspan_pda_chars_in_buffer (struct usb_serial_port *port)
633 struct keyspan_pda_private *priv;
635 priv = usb_get_serial_port_data(port);
637 /* when throttled, return at least WAKEUP_CHARS to tell select() (via
638 n_tty.c:normal_poll() ) that we're not writeable. */
639 if (port->write_urb_busy || priv->tx_throttled)
645 static int keyspan_pda_open (struct usb_serial_port *port, struct file *filp)
647 struct usb_serial *serial = port->serial;
650 struct keyspan_pda_private *priv;
652 /* find out how much room is in the Tx ring */
653 rc = usb_control_msg(serial->dev, usb_rcvctrlpipe(serial->dev, 0),
655 USB_TYPE_VENDOR | USB_RECIP_INTERFACE
663 dbg("%s - roomquery failed", __FUNCTION__);
667 dbg("%s - roomquery returned 0 bytes", __FUNCTION__);
671 priv = usb_get_serial_port_data(port);
672 priv->tx_room = room;
673 priv->tx_throttled = room ? 0 : 1;
675 /* the normal serial device seems to always turn on DTR and RTS here,
677 if (port->tty->termios->c_cflag & CBAUD)
678 keyspan_pda_set_modem_info(serial, (1<<7) | (1<<2) );
680 keyspan_pda_set_modem_info(serial, 0);
682 /*Start reading from the device*/
683 port->interrupt_in_urb->dev = serial->dev;
684 rc = usb_submit_urb(port->interrupt_in_urb, GFP_KERNEL);
686 dbg("%s - usb_submit_urb(read int) failed", __FUNCTION__);
695 static void keyspan_pda_close(struct usb_serial_port *port, struct file *filp)
697 struct usb_serial *serial = port->serial;
700 /* the normal serial device seems to always shut off DTR and RTS now */
701 if (port->tty->termios->c_cflag & HUPCL)
702 keyspan_pda_set_modem_info(serial, 0);
704 /* shutdown our bulk reads and writes */
705 usb_kill_urb(port->write_urb);
706 usb_kill_urb(port->interrupt_in_urb);
711 /* download the firmware to a "fake" device (pre-renumeration) */
712 static int keyspan_pda_fake_startup (struct usb_serial *serial)
715 const struct ezusb_hex_record *record = NULL;
717 /* download the firmware here ... */
718 response = ezusb_set_reset(serial, 1);
721 if (le16_to_cpu(serial->dev->descriptor.idVendor) == KEYSPAN_VENDOR_ID)
722 record = &keyspan_pda_firmware[0];
725 if ((le16_to_cpu(serial->dev->descriptor.idVendor) == XIRCOM_VENDOR_ID) ||
726 (le16_to_cpu(serial->dev->descriptor.idVendor) == ENTREGRA_VENDOR_ID))
727 record = &xircom_pgs_firmware[0];
729 if (record == NULL) {
730 err("%s: unknown vendor, aborting.", __FUNCTION__);
734 while(record->address != 0xffff) {
735 response = ezusb_writememory(serial, record->address,
736 (unsigned char *)record->data,
737 record->data_size, 0xa0);
739 err("ezusb_writememory failed for Keyspan PDA "
740 "firmware (%d %04X %p %d)",
742 record->address, record->data, record->data_size);
747 /* bring device out of reset. Renumeration will occur in a moment
748 and the new device will bind to the real driver */
749 response = ezusb_set_reset(serial, 0);
751 /* we want this device to fail to have a driver assigned to it. */
755 static int keyspan_pda_startup (struct usb_serial *serial)
758 struct keyspan_pda_private *priv;
760 /* allocate the private data structures for all ports. Well, for all
763 priv = kmalloc(sizeof(struct keyspan_pda_private), GFP_KERNEL);
765 return (1); /* error */
766 usb_set_serial_port_data(serial->port[0], priv);
767 init_waitqueue_head(&serial->port[0]->write_wait);
768 INIT_WORK(&priv->wakeup_work, (void *)keyspan_pda_wakeup_write,
769 (void *)(serial->port[0]));
770 INIT_WORK(&priv->unthrottle_work,
771 (void *)keyspan_pda_request_unthrottle,
776 static void keyspan_pda_shutdown (struct usb_serial *serial)
778 dbg("%s", __FUNCTION__);
780 kfree(usb_get_serial_port_data(serial->port[0]));
784 static struct usb_serial_driver keyspan_pda_fake_device = {
786 .owner = THIS_MODULE,
787 .name = "keyspan_pda_pre",
789 .description = "Keyspan PDA - (prerenumeration)",
790 .id_table = id_table_fake,
791 .num_interrupt_in = NUM_DONT_CARE,
792 .num_bulk_in = NUM_DONT_CARE,
793 .num_bulk_out = NUM_DONT_CARE,
795 .attach = keyspan_pda_fake_startup,
800 static struct usb_serial_driver xircom_pgs_fake_device = {
802 .owner = THIS_MODULE,
803 .name = "xircom_no_firm",
805 .description = "Xircom / Entregra PGS - (prerenumeration)",
806 .id_table = id_table_fake_xircom,
807 .num_interrupt_in = NUM_DONT_CARE,
808 .num_bulk_in = NUM_DONT_CARE,
809 .num_bulk_out = NUM_DONT_CARE,
811 .attach = keyspan_pda_fake_startup,
815 static struct usb_serial_driver keyspan_pda_device = {
817 .owner = THIS_MODULE,
818 .name = "keyspan_pda",
820 .description = "Keyspan PDA",
821 .id_table = id_table_std,
822 .num_interrupt_in = 1,
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");