]> bbs.cooldavid.org Git - net-next-2.6.git/blame - drivers/usb/class/usblp.c
git://bbs.cooldavid.org / net-next-2.6.git / blame
? search:
summary | shortlog | log | commit | commitdiff | tree
blob | blame (incremental) | history | HEAD
IRQ: Maintain regs pointer globally rather than passing to IRQ handlers
[net-next-2.6.git] / drivers / usb / class / usblp.c
CommitLineData
1da177e4
LT		 1/*
2 * usblp.c Version 0.13
3 *
4 * Copyright (c) 1999 Michael Gee <michael@linuxspecific.com>
5 * Copyright (c) 1999 Pavel Machek <pavel@suse.cz>
f4b09ebc 6 * Copyright (c) 2000 Randy Dunlap <rdunlap@xenotime.net>
1da177e4
LT		 7 * Copyright (c) 2000 Vojtech Pavlik <vojtech@suse.cz>
8 # Copyright (c) 2001 Pete Zaitcev <zaitcev@redhat.com>
9 # Copyright (c) 2001 David Paschal <paschal@rcsis.com>
8e695cdb 10 * Copyright (c) 2006 Oliver Neukum <oliver@neukum.name>
1da177e4
LT		 11 *
12 * USB Printer Device Class driver for USB printers and printer cables
13 *
14 * Sponsored by SuSE
15 *
16 * ChangeLog:
17 * v0.1 - thorough cleaning, URBification, almost a rewrite
18 * v0.2 - some more cleanups
19 * v0.3 - cleaner again, waitqueue fixes
20 * v0.4 - fixes in unidirectional mode
21 * v0.5 - add DEVICE_ID string support
22 * v0.6 - never time out
23 * v0.7 - fixed bulk-IN read and poll (David Paschal)
24 * v0.8 - add devfs support
25 * v0.9 - fix unplug-while-open paths
26 * v0.10- remove sleep_on, fix error on oom (oliver@neukum.org)
27 * v0.11 - add proto_bias option (Pete Zaitcev)
28 * v0.12 - add hpoj.sourceforge.net ioctls (David Paschal)
29 * v0.13 - alloc space for statusbuf (<status> not on stack);
30 * use usb_buffer_alloc() for read buf & write buf;
31 */
32
33/*
34 * This program is free software; you can redistribute it and/or modify
35 * it under the terms of the GNU General Public License as published by
36 * the Free Software Foundation; either version 2 of the License, or
37 * (at your option) any later version.
38 *
39 * This program is distributed in the hope that it will be useful,
40 * but WITHOUT ANY WARRANTY; without even the implied warranty of
41 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
42 * GNU General Public License for more details.
43 *
44 * You should have received a copy of the GNU General Public License
45 * along with this program; if not, write to the Free Software
46 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
47 */
48
49#include <linux/module.h>
50#include <linux/kernel.h>
51#include <linux/sched.h>
52#include <linux/smp_lock.h>
53#include <linux/signal.h>
54#include <linux/poll.h>
55#include <linux/init.h>
56#include <linux/slab.h>
57#include <linux/lp.h>
4186ecf8 58#include <linux/mutex.h>
1da177e4
LT		 59#undef DEBUG
60#include <linux/usb.h>
61
62/*
63 * Version Information
64 */
65#define DRIVER_VERSION "v0.13"
66#define DRIVER_AUTHOR "Michael Gee, Pavel Machek, Vojtech Pavlik, Randy Dunlap, Pete Zaitcev, David Paschal"
67#define DRIVER_DESC "USB Printer Device Class driver"
68
69#define USBLP_BUF_SIZE 8192
70#define USBLP_DEVICE_ID_SIZE 1024
71
72/* ioctls: */
73#define LPGETSTATUS 0x060b /* same as in drivers/char/lp.c */
74#define IOCNR_GET_DEVICE_ID 1
75#define IOCNR_GET_PROTOCOLS 2
76#define IOCNR_SET_PROTOCOL 3
77#define IOCNR_HP_SET_CHANNEL 4
78#define IOCNR_GET_BUS_ADDRESS 5
79#define IOCNR_GET_VID_PID 6
80#define IOCNR_SOFT_RESET 7
81/* Get device_id string: */
82#define LPIOC_GET_DEVICE_ID(len) _IOC(_IOC_READ, 'P', IOCNR_GET_DEVICE_ID, len)
83/* The following ioctls were added for http://hpoj.sourceforge.net: */
84/* Get two-int array:
85 * [0]=current protocol (1=7/1/1, 2=7/1/2, 3=7/1/3),
86 * [1]=supported protocol mask (mask&(1<<n)!=0 means 7/1/n supported): */
87#define LPIOC_GET_PROTOCOLS(len) _IOC(_IOC_READ, 'P', IOCNR_GET_PROTOCOLS, len)
88/* Set protocol (arg: 1=7/1/1, 2=7/1/2, 3=7/1/3): */
89#define LPIOC_SET_PROTOCOL _IOC(_IOC_WRITE, 'P', IOCNR_SET_PROTOCOL, 0)
90/* Set channel number (HP Vendor-specific command): */
91#define LPIOC_HP_SET_CHANNEL _IOC(_IOC_WRITE, 'P', IOCNR_HP_SET_CHANNEL, 0)
92/* Get two-int array: [0]=bus number, [1]=device address: */
93#define LPIOC_GET_BUS_ADDRESS(len) _IOC(_IOC_READ, 'P', IOCNR_GET_BUS_ADDRESS, len)
94/* Get two-int array: [0]=vendor ID, [1]=product ID: */
95#define LPIOC_GET_VID_PID(len) _IOC(_IOC_READ, 'P', IOCNR_GET_VID_PID, len)
96/* Perform class specific soft reset */
97#define LPIOC_SOFT_RESET _IOC(_IOC_NONE, 'P', IOCNR_SOFT_RESET, 0);
98
99/*
100 * A DEVICE_ID string may include the printer's serial number.
101 * It should end with a semi-colon (';').
102 * An example from an HP 970C DeskJet printer is (this is one long string,
103 * with the serial number changed):
104MFG:HEWLETT-PACKARD;MDL:DESKJET 970C;CMD:MLC,PCL,PML;CLASS:PRINTER;DESCRIPTION:Hewlett-Packard DeskJet 970C;SERN:US970CSEPROF;VSTATUS:$HB0$NC0,ff,DN,IDLE,CUT,K1,C0,DP,NR,KP000,CP027;VP:0800,FL,B0;VJ: ;
105 */
106
107/*
108 * USB Printer Requests
109 */
110
111#define USBLP_REQ_GET_ID 0x00
112#define USBLP_REQ_GET_STATUS 0x01
113#define USBLP_REQ_RESET 0x02
114#define USBLP_REQ_HP_CHANNEL_CHANGE_REQUEST 0x00 /* HP Vendor-specific */
115
116#define USBLP_MINORS 16
117#define USBLP_MINOR_BASE 0
118
119#define USBLP_WRITE_TIMEOUT (5000) /* 5 seconds */
120
121#define USBLP_FIRST_PROTOCOL 1
122#define USBLP_LAST_PROTOCOL 3
123#define USBLP_MAX_PROTOCOLS (USBLP_LAST_PROTOCOL+1)
124
125/*
126 * some arbitrary status buffer size;
127 * need a status buffer that is allocated via kmalloc(), not on stack
128 */
129#define STATUS_BUF_SIZE 8
130
131struct usblp {
132 struct usb_device *dev; /* USB device */
133 struct semaphore sem; /* locks this struct, especially "dev" */
134 char *writebuf; /* write transfer_buffer */
135 char *readbuf; /* read transfer_buffer */
136 char *statusbuf; /* status transfer_buffer */
137 struct urb *readurb, *writeurb; /* The urbs */
138 wait_queue_head_t wait; /* Zzzzz ... */
139 int readcount; /* Counter for reads */
140 int ifnum; /* Interface number */
141 struct usb_interface *intf; /* The interface */
142 /* Alternate-setting numbers and endpoints for each protocol
143 * (7/1/{index=1,2,3}) that the device supports: */
144 struct {
145 int alt_setting;
146 struct usb_endpoint_descriptor *epwrite;
147 struct usb_endpoint_descriptor *epread;
148 } protocol[USBLP_MAX_PROTOCOLS];
149 int current_protocol;
150 int minor; /* minor number of device */
151 int wcomplete; /* writing is completed */
152 int rcomplete; /* reading is completed */
153 unsigned int quirks; /* quirks flags */
154 unsigned char used; /* True if open */
155 unsigned char present; /* True if not disconnected */
156 unsigned char bidir; /* interface is bidirectional */
157 unsigned char *device_id_string; /* IEEE 1284 DEVICE ID string (ptr) */
158 /* first 2 bytes are (big-endian) length */
159};
160
161#ifdef DEBUG
162static void usblp_dump(struct usblp *usblp) {
163 int p;
164
165 dbg("usblp=0x%p", usblp);
166 dbg("dev=0x%p", usblp->dev);
167 dbg("present=%d", usblp->present);
168 dbg("readbuf=0x%p", usblp->readbuf);
169 dbg("writebuf=0x%p", usblp->writebuf);
170 dbg("readurb=0x%p", usblp->readurb);
171 dbg("writeurb=0x%p", usblp->writeurb);
172 dbg("readcount=%d", usblp->readcount);
173 dbg("ifnum=%d", usblp->ifnum);
174 for (p = USBLP_FIRST_PROTOCOL; p <= USBLP_LAST_PROTOCOL; p++) {
175 dbg("protocol[%d].alt_setting=%d", p, usblp->protocol[p].alt_setting);
176 dbg("protocol[%d].epwrite=%p", p, usblp->protocol[p].epwrite);
177 dbg("protocol[%d].epread=%p", p, usblp->protocol[p].epread);
178 }
179 dbg("current_protocol=%d", usblp->current_protocol);
180 dbg("minor=%d", usblp->minor);
181 dbg("wcomplete=%d", usblp->wcomplete);
182 dbg("rcomplete=%d", usblp->rcomplete);
183 dbg("quirks=%d", usblp->quirks);
184 dbg("used=%d", usblp->used);
185 dbg("bidir=%d", usblp->bidir);
186 dbg("device_id_string=\"%s\"",
187 usblp->device_id_string ?
188 usblp->device_id_string + 2 :
189 (unsigned char *)"(null)");
190}
191#endif
192
193/* Quirks: various printer quirks are handled by this table & its flags. */
194
195struct quirk_printer_struct {
196 __u16 vendorId;
197 __u16 productId;
198 unsigned int quirks;
199};
200
201#define USBLP_QUIRK_BIDIR 0x1 /* reports bidir but requires unidirectional mode (no INs/reads) */
202#define USBLP_QUIRK_USB_INIT 0x2 /* needs vendor USB init string */
203
4c4c9432 204static const struct quirk_printer_struct quirk_printers[] = {
1da177e4
LT		 205 { 0x03f0, 0x0004, USBLP_QUIRK_BIDIR }, /* HP DeskJet 895C */
206 { 0x03f0, 0x0104, USBLP_QUIRK_BIDIR }, /* HP DeskJet 880C */
207 { 0x03f0, 0x0204, USBLP_QUIRK_BIDIR }, /* HP DeskJet 815C */
208 { 0x03f0, 0x0304, USBLP_QUIRK_BIDIR }, /* HP DeskJet 810C/812C */
209 { 0x03f0, 0x0404, USBLP_QUIRK_BIDIR }, /* HP DeskJet 830C */
210 { 0x03f0, 0x0504, USBLP_QUIRK_BIDIR }, /* HP DeskJet 885C */
211 { 0x03f0, 0x0604, USBLP_QUIRK_BIDIR }, /* HP DeskJet 840C */
212 { 0x03f0, 0x0804, USBLP_QUIRK_BIDIR }, /* HP DeskJet 816C */
213 { 0x03f0, 0x1104, USBLP_QUIRK_BIDIR }, /* HP Deskjet 959C */
214 { 0x0409, 0xefbe, USBLP_QUIRK_BIDIR }, /* NEC Picty900 (HP OEM) */
215 { 0x0409, 0xbef4, USBLP_QUIRK_BIDIR }, /* NEC Picty760 (HP OEM) */
216 { 0x0409, 0xf0be, USBLP_QUIRK_BIDIR }, /* NEC Picty920 (HP OEM) */
217 { 0x0409, 0xf1be, USBLP_QUIRK_BIDIR }, /* NEC Picty800 (HP OEM) */
218 { 0, 0 }
219};
220
221static int usblp_select_alts(struct usblp *usblp);
222static int usblp_set_protocol(struct usblp *usblp, int protocol);
223static int usblp_cache_device_id_string(struct usblp *usblp);
224
225/* forward reference to make our lives easier */
226static struct usb_driver usblp_driver;
4186ecf8 227static DEFINE_MUTEX(usblp_mutex); /* locks the existence of usblp's */
1da177e4
LT		 228
229/*
230 * Functions for usblp control messages.
231 */
232
233static int usblp_ctrl_msg(struct usblp *usblp, int request, int type, int dir, int recip, int value, void *buf, int len)
234{
235 int retval;
236 int index = usblp->ifnum;
237
238 /* High byte has the interface index.
239 Low byte has the alternate setting.
240 */
241 if ((request == USBLP_REQ_GET_ID) && (type == USB_TYPE_CLASS)) {
242 index = (usblp->ifnum<<8)|usblp->protocol[usblp->current_protocol].alt_setting;
243 }
244
245 retval = usb_control_msg(usblp->dev,
246 dir ? usb_rcvctrlpipe(usblp->dev, 0) : usb_sndctrlpipe(usblp->dev, 0),
247 request, type | dir | recip, value, index, buf, len, USBLP_WRITE_TIMEOUT);
248 dbg("usblp_control_msg: rq: 0x%02x dir: %d recip: %d value: %d idx: %d len: %#x result: %d",
249 request, !!dir, recip, value, index, len, retval);
250 return retval < 0 ? retval : 0;
251}
252
253#define usblp_read_status(usblp, status)\
254 usblp_ctrl_msg(usblp, USBLP_REQ_GET_STATUS, USB_TYPE_CLASS, USB_DIR_IN, USB_RECIP_INTERFACE, 0, status, 1)
255#define usblp_get_id(usblp, config, id, maxlen)\
256 usblp_ctrl_msg(usblp, USBLP_REQ_GET_ID, USB_TYPE_CLASS, USB_DIR_IN, USB_RECIP_INTERFACE, config, id, maxlen)
257#define usblp_reset(usblp)\
258 usblp_ctrl_msg(usblp, USBLP_REQ_RESET, USB_TYPE_CLASS, USB_DIR_OUT, USB_RECIP_OTHER, 0, NULL, 0)
259
260#define usblp_hp_channel_change_request(usblp, channel, buffer) \
261 usblp_ctrl_msg(usblp, USBLP_REQ_HP_CHANNEL_CHANGE_REQUEST, USB_TYPE_VENDOR, USB_DIR_IN, USB_RECIP_INTERFACE, channel, buffer, 1)
262
263/*
264 * See the description for usblp_select_alts() below for the usage
265 * explanation. Look into your /proc/bus/usb/devices and dmesg in
266 * case of any trouble.
267 */
268static int proto_bias = -1;
269
270/*
271 * URB callback.
272 */
273
7d12e780 274static void usblp_bulk_read(struct urb *urb)
1da177e4
LT		 275{
276 struct usblp *usblp = urb->context;
277
8e695cdb 278 if (unlikely(!usblp || !usblp->dev || !usblp->used))
1da177e4
LT		 279 return;
280
8e695cdb
ON		 281 if (unlikely(!usblp->present))
282 goto unplug;
1da177e4
LT		 283 if (unlikely(urb->status))
284 warn("usblp%d: nonzero read/write bulk status received: %d",
285 usblp->minor, urb->status);
286 usblp->rcomplete = 1;
8e695cdb 287unplug:
1da177e4
LT		 288 wake_up_interruptible(&usblp->wait);
289}
290
7d12e780 291static void usblp_bulk_write(struct urb *urb)
1da177e4
LT		 292{
293 struct usblp *usblp = urb->context;
294
8e695cdb 295 if (unlikely(!usblp || !usblp->dev || !usblp->used))
1da177e4 296 return;
8e695cdb
ON		 297 if (unlikely(!usblp->present))
298 goto unplug;
1da177e4
LT		 299 if (unlikely(urb->status))
300 warn("usblp%d: nonzero read/write bulk status received: %d",
301 usblp->minor, urb->status);
302 usblp->wcomplete = 1;
8e695cdb 303unplug:
1da177e4
LT		 304 wake_up_interruptible(&usblp->wait);
305}
306
307/*
308 * Get and print printer errors.
309 */
310
4c4c9432 311static const char *usblp_messages[] = { "ok", "out of paper", "off-line", "on fire" };
1da177e4
LT		 312
313static int usblp_check_status(struct usblp *usblp, int err)
314{
315 unsigned char status, newerr = 0;
316 int error;
317
318 error = usblp_read_status (usblp, usblp->statusbuf);
319 if (error < 0) {
0bc8e009
RD		 320 if (printk_ratelimit())
321 err("usblp%d: error %d reading printer status",
322 usblp->minor, error);
1da177e4
LT		 323 return 0;
324 }
325
326 status = *usblp->statusbuf;
327
328 if (~status & LP_PERRORP)
329 newerr = 3;
330 if (status & LP_POUTPA)
331 newerr = 1;
332 if (~status & LP_PSELECD)
333 newerr = 2;
334
335 if (newerr != err)
336 info("usblp%d: %s", usblp->minor, usblp_messages[newerr]);
337
338 return newerr;
339}
340
341/*
342 * File op functions.
343 */
344
345static int usblp_open(struct inode *inode, struct file *file)
346{
347 int minor = iminor(inode);
348 struct usblp *usblp;
349 struct usb_interface *intf;
350 int retval;
351
352 if (minor < 0)
353 return -ENODEV;
354
4186ecf8 355 mutex_lock (&usblp_mutex);
1da177e4
LT		 356
357 retval = -ENODEV;
358 intf = usb_find_interface(&usblp_driver, minor);
359 if (!intf) {
360 goto out;
361 }
362 usblp = usb_get_intfdata (intf);
363 if (!usblp || !usblp->dev || !usblp->present)
364 goto out;
365
366 retval = -EBUSY;
367 if (usblp->used)
368 goto out;
369
370 /*
371 * TODO: need to implement LP_ABORTOPEN + O_NONBLOCK as in drivers/char/lp.c ???
372 * This is #if 0-ed because we *don't* want to fail an open
373 * just because the printer is off-line.
374 */
375#if 0
376 if ((retval = usblp_check_status(usblp, 0))) {
377 retval = retval > 1 ? -EIO : -ENOSPC;
378 goto out;
379 }
380#else
381 retval = 0;
382#endif
383
384 usblp->used = 1;
385 file->private_data = usblp;
386
387 usblp->writeurb->transfer_buffer_length = 0;
388 usblp->wcomplete = 1; /* we begin writeable */
389 usblp->rcomplete = 0;
2c45b6fe
AO		 390 usblp->writeurb->status = 0;
391 usblp->readurb->status = 0;
1da177e4
LT		 392
393 if (usblp->bidir) {
394 usblp->readcount = 0;
395 usblp->readurb->dev = usblp->dev;
396 if (usb_submit_urb(usblp->readurb, GFP_KERNEL) < 0) {
397 retval = -EIO;
398 usblp->used = 0;
399 file->private_data = NULL;
400 }
401 }
402out:
4186ecf8 403 mutex_unlock (&usblp_mutex);
1da177e4
LT		 404 return retval;
405}
406
407static void usblp_cleanup (struct usblp *usblp)
408{
409 info("usblp%d: removed", usblp->minor);
410
411 kfree (usblp->device_id_string);
412 kfree (usblp->statusbuf);
413 usb_free_urb(usblp->writeurb);
414 usb_free_urb(usblp->readurb);
415 kfree (usblp);
416}
417
418static void usblp_unlink_urbs(struct usblp *usblp)
419{
420 usb_kill_urb(usblp->writeurb);
421 if (usblp->bidir)
422 usb_kill_urb(usblp->readurb);
423}
424
425static int usblp_release(struct inode *inode, struct file *file)
426{
427 struct usblp *usblp = file->private_data;
428
4186ecf8 429 mutex_lock (&usblp_mutex);
1da177e4
LT		 430 usblp->used = 0;
431 if (usblp->present) {
432 usblp_unlink_urbs(usblp);
433 } else /* finish cleanup from disconnect */
434 usblp_cleanup (usblp);
4186ecf8 435 mutex_unlock (&usblp_mutex);
1da177e4
LT		 436 return 0;
437}
438
439/* No kernel lock - fine */
440static unsigned int usblp_poll(struct file *file, struct poll_table_struct *wait)
441{
442 struct usblp *usblp = file->private_data;
443 poll_wait(file, &usblp->wait, wait);
444 return ((!usblp->bidir || !usblp->rcomplete) ? 0 : POLLIN | POLLRDNORM)
445 | (!usblp->wcomplete ? 0 : POLLOUT | POLLWRNORM);
446}
447
318e479e 448static long usblp_ioctl(struct file *file, unsigned int cmd, unsigned long arg)
1da177e4
LT		 449{
450 struct usblp *usblp = file->private_data;
451 int length, err, i;
452 unsigned char newChannel;
453 int status;
454 int twoints[2];
455 int retval = 0;
456
457 down (&usblp->sem);
458 if (!usblp->present) {
459 retval = -ENODEV;
460 goto done;
461 }
462
463 dbg("usblp_ioctl: cmd=0x%x (%c nr=%d len=%d dir=%d)", cmd, _IOC_TYPE(cmd),
464 _IOC_NR(cmd), _IOC_SIZE(cmd), _IOC_DIR(cmd) );
465
466 if (_IOC_TYPE(cmd) == 'P') /* new-style ioctl number */
467
468 switch (_IOC_NR(cmd)) {
469
470 case IOCNR_GET_DEVICE_ID: /* get the DEVICE_ID string */
471 if (_IOC_DIR(cmd) != _IOC_READ) {
472 retval = -EINVAL;
473 goto done;
474 }
475
476 length = usblp_cache_device_id_string(usblp);
477 if (length < 0) {
478 retval = length;
479 goto done;
480 }
481 if (length > _IOC_SIZE(cmd))
482 length = _IOC_SIZE(cmd); /* truncate */
483
484 if (copy_to_user((void __user *) arg,
485 usblp->device_id_string,
486 (unsigned long) length)) {
487 retval = -EFAULT;
488 goto done;
489 }
490
491 break;
492
493 case IOCNR_GET_PROTOCOLS:
494 if (_IOC_DIR(cmd) != _IOC_READ ||
495 _IOC_SIZE(cmd) < sizeof(twoints)) {
496 retval = -EINVAL;
497 goto done;
498 }
499
500 twoints[0] = usblp->current_protocol;
501 twoints[1] = 0;
502 for (i = USBLP_FIRST_PROTOCOL;
503 i <= USBLP_LAST_PROTOCOL; i++) {
504 if (usblp->protocol[i].alt_setting >= 0)
505 twoints[1] |= (1<<i);
506 }
507
508 if (copy_to_user((void __user *)arg,
509 (unsigned char *)twoints,
510 sizeof(twoints))) {
511 retval = -EFAULT;
512 goto done;
513 }
514
515 break;
516
517 case IOCNR_SET_PROTOCOL:
518 if (_IOC_DIR(cmd) != _IOC_WRITE) {
519 retval = -EINVAL;
520 goto done;
521 }
522
523#ifdef DEBUG
524 if (arg == -10) {
525 usblp_dump(usblp);
526 break;
527 }
528#endif
529
530 usblp_unlink_urbs(usblp);
531 retval = usblp_set_protocol(usblp, arg);
532 if (retval < 0) {
533 usblp_set_protocol(usblp,
534 usblp->current_protocol);
535 }
536 break;
537
538 case IOCNR_HP_SET_CHANNEL:
539 if (_IOC_DIR(cmd) != _IOC_WRITE ||
540 le16_to_cpu(usblp->dev->descriptor.idVendor) != 0x03F0 ||
541 usblp->quirks & USBLP_QUIRK_BIDIR) {
542 retval = -EINVAL;
543 goto done;
544 }
545
546 err = usblp_hp_channel_change_request(usblp,
547 arg, &newChannel);
548 if (err < 0) {
549 err("usblp%d: error = %d setting "
550 "HP channel",
551 usblp->minor, err);
552 retval = -EIO;
553 goto done;
554 }
555
556 dbg("usblp%d requested/got HP channel %ld/%d",
557 usblp->minor, arg, newChannel);
558 break;
559
560 case IOCNR_GET_BUS_ADDRESS:
561 if (_IOC_DIR(cmd) != _IOC_READ ||
562 _IOC_SIZE(cmd) < sizeof(twoints)) {
563 retval = -EINVAL;
564 goto done;
565 }
566
567 twoints[0] = usblp->dev->bus->busnum;
568 twoints[1] = usblp->dev->devnum;
569 if (copy_to_user((void __user *)arg,
570 (unsigned char *)twoints,
571 sizeof(twoints))) {
572 retval = -EFAULT;
573 goto done;
574 }
575
576 dbg("usblp%d is bus=%d, device=%d",
577 usblp->minor, twoints[0], twoints[1]);
578 break;
579
580 case IOCNR_GET_VID_PID:
581 if (_IOC_DIR(cmd) != _IOC_READ ||
582 _IOC_SIZE(cmd) < sizeof(twoints)) {
583 retval = -EINVAL;
584 goto done;
585 }
586
587 twoints[0] = le16_to_cpu(usblp->dev->descriptor.idVendor);
588 twoints[1] = le16_to_cpu(usblp->dev->descriptor.idProduct);
589 if (copy_to_user((void __user *)arg,
590 (unsigned char *)twoints,
591 sizeof(twoints))) {
592 retval = -EFAULT;
593 goto done;
594 }
595
596 dbg("usblp%d is VID=0x%4.4X, PID=0x%4.4X",
597 usblp->minor, twoints[0], twoints[1]);
598 break;
599
600 case IOCNR_SOFT_RESET:
601 if (_IOC_DIR(cmd) != _IOC_NONE) {
602 retval = -EINVAL;
603 goto done;
604 }
605 retval = usblp_reset(usblp);
606 break;
607 default:
608 retval = -ENOTTY;
609 }
610 else /* old-style ioctl value */
611 switch (cmd) {
612
613 case LPGETSTATUS:
614 if (usblp_read_status(usblp, usblp->statusbuf)) {
0bc8e009
RD		 615 if (printk_ratelimit())
616 err("usblp%d: failed reading printer status",
617 usblp->minor);
1da177e4
LT		 618 retval = -EIO;
619 goto done;
620 }
621 status = *usblp->statusbuf;
622 if (copy_to_user ((void __user *)arg, &status, sizeof(int)))
623 retval = -EFAULT;
624 break;
625
626 default:
627 retval = -ENOTTY;
628 }
629
630done:
631 up (&usblp->sem);
632 return retval;
633}
634
635static ssize_t usblp_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos)
636{
1da177e4 637 struct usblp *usblp = file->private_data;
8e695cdb 638 int timeout, rv, err = 0, transfer_length = 0;
1da177e4
LT		 639 size_t writecount = 0;
640
641 while (writecount < count) {
642 if (!usblp->wcomplete) {
643 barrier();
644 if (file->f_flags & O_NONBLOCK) {
645 writecount += transfer_length;
646 return writecount ? writecount : -EAGAIN;
647 }
648
649 timeout = USBLP_WRITE_TIMEOUT;
1da177e4 650
8e695cdb
ON		 651 rv = wait_event_interruptible_timeout(usblp->wait, usblp->wcomplete || !usblp->present , timeout);
652 if (rv < 0)
653 return writecount ? writecount : -EINTR;
1da177e4 654 }
1da177e4
LT		 655 down (&usblp->sem);
656 if (!usblp->present) {
657 up (&usblp->sem);
658 return -ENODEV;
659 }
660
661 if (usblp->writeurb->status != 0) {
662 if (usblp->quirks & USBLP_QUIRK_BIDIR) {
663 if (!usblp->wcomplete)
664 err("usblp%d: error %d writing to printer",
665 usblp->minor, usblp->writeurb->status);
666 err = usblp->writeurb->status;
667 } else
668 err = usblp_check_status(usblp, err);
669 up (&usblp->sem);
670
671 /* if the fault was due to disconnect, let khubd's
672 * call to usblp_disconnect() grab usblp->sem ...
673 */
674 schedule ();
675 continue;
676 }
677
678 /* We must increment writecount here, and not at the
679 * end of the loop. Otherwise, the final loop iteration may
680 * be skipped, leading to incomplete printer output.
681 */
682 writecount += transfer_length;
683 if (writecount == count) {
684 up(&usblp->sem);
685 break;
686 }
687
688 transfer_length=(count - writecount);
689 if (transfer_length > USBLP_BUF_SIZE)
690 transfer_length = USBLP_BUF_SIZE;
691
692 usblp->writeurb->transfer_buffer_length = transfer_length;
693
694 if (copy_from_user(usblp->writeurb->transfer_buffer,
695 buffer + writecount, transfer_length)) {
696 up(&usblp->sem);
697 return writecount ? writecount : -EFAULT;
698 }
699
700 usblp->writeurb->dev = usblp->dev;
701 usblp->wcomplete = 0;
702 err = usb_submit_urb(usblp->writeurb, GFP_KERNEL);
703 if (err) {
704 if (err != -ENOMEM)
705 count = -EIO;
706 else
707 count = writecount ? writecount : -ENOMEM;
708 up (&usblp->sem);
709 break;
710 }
711 up (&usblp->sem);
712 }
713
714 return count;
715}
716
717static ssize_t usblp_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos)
718{
719 struct usblp *usblp = file->private_data;
8e695cdb 720 int rv;
1da177e4
LT		 721
722 if (!usblp->bidir)
723 return -EINVAL;
724
725 down (&usblp->sem);
726 if (!usblp->present) {
727 count = -ENODEV;
728 goto done;
729 }
730
731 if (!usblp->rcomplete) {
732 barrier();
733
734 if (file->f_flags & O_NONBLOCK) {
735 count = -EAGAIN;
736 goto done;
737 }
8e695cdb
ON		 738 up(&usblp->sem);
739 rv = wait_event_interruptible(usblp->wait, usblp->rcomplete || !usblp->present);
740 down(&usblp->sem);
741 if (rv < 0) {
742 count = -EINTR;
743 goto done;
1da177e4 744 }
1da177e4
LT		 745 }
746
747 if (!usblp->present) {
748 count = -ENODEV;
749 goto done;
750 }
751
752 if (usblp->readurb->status) {
753 err("usblp%d: error %d reading from printer",
754 usblp->minor, usblp->readurb->status);
755 usblp->readurb->dev = usblp->dev;
756 usblp->readcount = 0;
757 usblp->rcomplete = 0;
758 if (usb_submit_urb(usblp->readurb, GFP_KERNEL) < 0)
759 dbg("error submitting urb");
760 count = -EIO;
761 goto done;
762 }
763
764 count = count < usblp->readurb->actual_length - usblp->readcount ?
765 count : usblp->readurb->actual_length - usblp->readcount;
766
767 if (copy_to_user(buffer, usblp->readurb->transfer_buffer + usblp->readcount, count)) {
768 count = -EFAULT;
769 goto done;
770 }
771
772 if ((usblp->readcount += count) == usblp->readurb->actual_length) {
773 usblp->readcount = 0;
774 usblp->readurb->dev = usblp->dev;
775 usblp->rcomplete = 0;
776 if (usb_submit_urb(usblp->readurb, GFP_KERNEL)) {
777 count = -EIO;
778 goto done;
779 }
780 }
781
782done:
783 up (&usblp->sem);
784 return count;
785}
786
787/*
788 * Checks for printers that have quirks, such as requiring unidirectional
789 * communication but reporting bidirectional; currently some HP printers
790 * have this flaw (HP 810, 880, 895, etc.), or needing an init string
791 * sent at each open (like some Epsons).
792 * Returns 1 if found, 0 if not found.
793 *
794 * HP recommended that we use the bidirectional interface but
795 * don't attempt any bulk IN transfers from the IN endpoint.
796 * Here's some more detail on the problem:
797 * The problem is not that it isn't bidirectional though. The problem
798 * is that if you request a device ID, or status information, while
799 * the buffers are full, the return data will end up in the print data
800 * buffer. For example if you make sure you never request the device ID
801 * while you are sending print data, and you don't try to query the
802 * printer status every couple of milliseconds, you will probably be OK.
803 */
804static unsigned int usblp_quirks (__u16 vendor, __u16 product)
805{
806 int i;
807
808 for (i = 0; quirk_printers[i].vendorId; i++) {
809 if (vendor == quirk_printers[i].vendorId &&
810 product == quirk_printers[i].productId)
811 return quirk_printers[i].quirks;
812 }
813 return 0;
814}
815
066202dd 816static const struct file_operations usblp_fops = {
1da177e4
LT		 817 .owner = THIS_MODULE,
818 .read = usblp_read,
819 .write = usblp_write,
820 .poll = usblp_poll,
318e479e
PZ		 821 .unlocked_ioctl = usblp_ioctl,
822 .compat_ioctl = usblp_ioctl,
1da177e4
LT		 823 .open = usblp_open,
824 .release = usblp_release,
825};
826
827static struct usb_class_driver usblp_class = {
d6e5bcf4 828 .name = "lp%d",
1da177e4 829 .fops = &usblp_fops,
1da177e4
LT		 830 .minor_base = USBLP_MINOR_BASE,
831};
832
a9714c84
DW		 833static ssize_t usblp_show_ieee1284_id(struct device *dev, struct device_attribute *attr, char *buf)
834{
835 struct usb_interface *intf = to_usb_interface(dev);
836 struct usblp *usblp = usb_get_intfdata (intf);
837
838 if (usblp->device_id_string[0] == 0 &&
839 usblp->device_id_string[1] == 0)
840 return 0;
841
842 return sprintf(buf, "%s", usblp->device_id_string+2);
843}
844
845static DEVICE_ATTR(ieee1284_id, S_IRUGO, usblp_show_ieee1284_id, NULL);
846
1da177e4
LT		 847static int usblp_probe(struct usb_interface *intf,
848 const struct usb_device_id *id)
849{
850 struct usb_device *dev = interface_to_usbdev (intf);
851 struct usblp *usblp = NULL;
852 int protocol;
853 int retval;
854
855 /* Malloc and start initializing usblp structure so we can use it
856 * directly. */
8e695cdb 857 if (!(usblp = kzalloc(sizeof(struct usblp), GFP_KERNEL))) {
1da177e4
LT		 858 err("out of memory for usblp");
859 goto abort;
860 }
1da177e4
LT		 861 usblp->dev = dev;
862 init_MUTEX (&usblp->sem);
863 init_waitqueue_head(&usblp->wait);
864 usblp->ifnum = intf->cur_altsetting->desc.bInterfaceNumber;
865 usblp->intf = intf;
866
867 usblp->writeurb = usb_alloc_urb(0, GFP_KERNEL);
868 if (!usblp->writeurb) {
869 err("out of memory");
870 goto abort;
871 }
872 usblp->readurb = usb_alloc_urb(0, GFP_KERNEL);
873 if (!usblp->readurb) {
874 err("out of memory");
875 goto abort;
876 }
877
878 /* Malloc device ID string buffer to the largest expected length,
879 * since we can re-query it on an ioctl and a dynamic string
880 * could change in length. */
881 if (!(usblp->device_id_string = kmalloc(USBLP_DEVICE_ID_SIZE, GFP_KERNEL))) {
882 err("out of memory for device_id_string");
883 goto abort;
884 }
885
886 usblp->writebuf = usblp->readbuf = NULL;
887 usblp->writeurb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
888 usblp->readurb->transfer_flags = URB_NO_TRANSFER_DMA_MAP;
889 /* Malloc write & read buffers. We somewhat wastefully
890 * malloc both regardless of bidirectionality, because the
891 * alternate setting can be changed later via an ioctl. */
892 if (!(usblp->writebuf = usb_buffer_alloc(dev, USBLP_BUF_SIZE,
893 GFP_KERNEL, &usblp->writeurb->transfer_dma))) {
894 err("out of memory for write buf");
895 goto abort;
896 }
897 if (!(usblp->readbuf = usb_buffer_alloc(dev, USBLP_BUF_SIZE,
898 GFP_KERNEL, &usblp->readurb->transfer_dma))) {
899 err("out of memory for read buf");
900 goto abort;
901 }
902
903 /* Allocate buffer for printer status */
904 usblp->statusbuf = kmalloc(STATUS_BUF_SIZE, GFP_KERNEL);
905 if (!usblp->statusbuf) {
906 err("out of memory for statusbuf");
907 goto abort;
908 }
909
910 /* Lookup quirks for this printer. */
911 usblp->quirks = usblp_quirks(
912 le16_to_cpu(dev->descriptor.idVendor),
913 le16_to_cpu(dev->descriptor.idProduct));
914
915 /* Analyze and pick initial alternate settings and endpoints. */
916 protocol = usblp_select_alts(usblp);
917 if (protocol < 0) {
918 dbg("incompatible printer-class device 0x%4.4X/0x%4.4X",
919 le16_to_cpu(dev->descriptor.idVendor),
920 le16_to_cpu(dev->descriptor.idProduct));
921 goto abort;
922 }
923
924 /* Setup the selected alternate setting and endpoints. */
925 if (usblp_set_protocol(usblp, protocol) < 0)
926 goto abort;
927
928 /* Retrieve and store the device ID string. */
929 usblp_cache_device_id_string(usblp);
96cede53
GKH		 930 retval = device_create_file(&intf->dev, &dev_attr_ieee1284_id);
931 if (retval)
932 goto abort_intfdata;
1da177e4
LT		 933
934#ifdef DEBUG
935 usblp_check_status(usblp, 0);
936#endif
937
1da177e4
LT		 938 usb_set_intfdata (intf, usblp);
939
940 usblp->present = 1;
941
942 retval = usb_register_dev(intf, &usblp_class);
943 if (retval) {
944 err("Not able to get a minor for this device.");
945 goto abort_intfdata;
946 }
947 usblp->minor = intf->minor;
a9714c84
DW		 948 info("usblp%d: USB %sdirectional printer dev %d "
949 "if %d alt %d proto %d vid 0x%4.4X pid 0x%4.4X",
950 usblp->minor, usblp->bidir ? "Bi" : "Uni", dev->devnum,
951 usblp->ifnum,
952 usblp->protocol[usblp->current_protocol].alt_setting,
953 usblp->current_protocol,
954 le16_to_cpu(usblp->dev->descriptor.idVendor),
955 le16_to_cpu(usblp->dev->descriptor.idProduct));
1da177e4
LT		 956
957 return 0;
958
959abort_intfdata:
960 usb_set_intfdata (intf, NULL);
a9714c84 961 device_remove_file(&intf->dev, &dev_attr_ieee1284_id);
1da177e4
LT		 962abort:
963 if (usblp) {
964 if (usblp->writebuf)
965 usb_buffer_free (usblp->dev, USBLP_BUF_SIZE,
966 usblp->writebuf, usblp->writeurb->transfer_dma);
967 if (usblp->readbuf)
968 usb_buffer_free (usblp->dev, USBLP_BUF_SIZE,
969 usblp->readbuf, usblp->writeurb->transfer_dma);
970 kfree(usblp->statusbuf);
971 kfree(usblp->device_id_string);
972 usb_free_urb(usblp->writeurb);
973 usb_free_urb(usblp->readurb);
974 kfree(usblp);
975 }
976 return -EIO;
977}
978
979/*
980 * We are a "new" style driver with usb_device_id table,
981 * but our requirements are too intricate for simple match to handle.
982 *
983 * The "proto_bias" option may be used to specify the preferred protocol
984 * for all USB printers (1=7/1/1, 2=7/1/2, 3=7/1/3). If the device
985 * supports the preferred protocol, then we bind to it.
986 *
987 * The best interface for us is 7/1/2, because it is compatible
988 * with a stream of characters. If we find it, we bind to it.
989 *
990 * Note that the people from hpoj.sourceforge.net need to be able to
991 * bind to 7/1/3 (MLC/1284.4), so we provide them ioctls for this purpose.
992 *
993 * Failing 7/1/2, we look for 7/1/3, even though it's probably not
994 * stream-compatible, because this matches the behaviour of the old code.
995 *
996 * If nothing else, we bind to 7/1/1 - the unidirectional interface.
997 */
998static int usblp_select_alts(struct usblp *usblp)
999{
1000 struct usb_interface *if_alt;
1001 struct usb_host_interface *ifd;
1002 struct usb_endpoint_descriptor *epd, *epwrite, *epread;
1003 int p, i, e;
1004
1005 if_alt = usblp->intf;
1006
1007 for (p = 0; p < USBLP_MAX_PROTOCOLS; p++)
1008 usblp->protocol[p].alt_setting = -1;
1009
1010 /* Find out what we have. */
1011 for (i = 0; i < if_alt->num_altsetting; i++) {
1012 ifd = &if_alt->altsetting[i];
1013
1014 if (ifd->desc.bInterfaceClass != 7 || ifd->desc.bInterfaceSubClass != 1)
1015 continue;
1016
1017 if (ifd->desc.bInterfaceProtocol < USBLP_FIRST_PROTOCOL ||
1018 ifd->desc.bInterfaceProtocol > USBLP_LAST_PROTOCOL)
1019 continue;
1020
1021 /* Look for bulk OUT and IN endpoints. */
1022 epwrite = epread = NULL;
1023 for (e = 0; e < ifd->desc.bNumEndpoints; e++) {
1024 epd = &ifd->endpoint[e].desc;
1025
5bc66d53 1026 if (usb_endpoint_is_bulk_out(epd))
1da177e4
LT		 1027 if (!epwrite)
1028 epwrite = epd;
1029
5bc66d53 1030 if (usb_endpoint_is_bulk_in(epd))
1da177e4
LT		 1031 if (!epread)
1032 epread = epd;
1da177e4
LT		 1033 }
1034
1035 /* Ignore buggy hardware without the right endpoints. */
1036 if (!epwrite || (ifd->desc.bInterfaceProtocol > 1 && !epread))
1037 continue;
1038
1039 /* Turn off reads for 7/1/1 (unidirectional) interfaces
1040 * and buggy bidirectional printers. */
1041 if (ifd->desc.bInterfaceProtocol == 1) {
1042 epread = NULL;
1043 } else if (usblp->quirks & USBLP_QUIRK_BIDIR) {
1044 info("Disabling reads from problem bidirectional "
1045 "printer on usblp%d", usblp->minor);
1046 epread = NULL;
1047 }
1048
1049 usblp->protocol[ifd->desc.bInterfaceProtocol].alt_setting =
1050 ifd->desc.bAlternateSetting;
1051 usblp->protocol[ifd->desc.bInterfaceProtocol].epwrite = epwrite;
1052 usblp->protocol[ifd->desc.bInterfaceProtocol].epread = epread;
1053 }
1054
1055 /* If our requested protocol is supported, then use it. */
1056 if (proto_bias >= USBLP_FIRST_PROTOCOL &&
1057 proto_bias <= USBLP_LAST_PROTOCOL &&
1058 usblp->protocol[proto_bias].alt_setting != -1)
1059 return proto_bias;
1060
1061 /* Ordering is important here. */
1062 if (usblp->protocol[2].alt_setting != -1)
1063 return 2;
1064 if (usblp->protocol[1].alt_setting != -1)
1065 return 1;
1066 if (usblp->protocol[3].alt_setting != -1)
1067 return 3;
1068
1069 /* If nothing is available, then don't bind to this device. */
1070 return -1;
1071}
1072
1073static int usblp_set_protocol(struct usblp *usblp, int protocol)
1074{
1075 int r, alts;
1076
1077 if (protocol < USBLP_FIRST_PROTOCOL || protocol > USBLP_LAST_PROTOCOL)
1078 return -EINVAL;
1079
1080 alts = usblp->protocol[protocol].alt_setting;
1081 if (alts < 0)
1082 return -EINVAL;
1083 r = usb_set_interface(usblp->dev, usblp->ifnum, alts);
1084 if (r < 0) {
1085 err("can't set desired altsetting %d on interface %d",
1086 alts, usblp->ifnum);
1087 return r;
1088 }
1089
1090 usb_fill_bulk_urb(usblp->writeurb, usblp->dev,
1091 usb_sndbulkpipe(usblp->dev,
1092 usblp->protocol[protocol].epwrite->bEndpointAddress),
1093 usblp->writebuf, 0,
1094 usblp_bulk_write, usblp);
1095
1096 usblp->bidir = (usblp->protocol[protocol].epread != NULL);
1097 if (usblp->bidir)
1098 usb_fill_bulk_urb(usblp->readurb, usblp->dev,
1099 usb_rcvbulkpipe(usblp->dev,
1100 usblp->protocol[protocol].epread->bEndpointAddress),
1101 usblp->readbuf, USBLP_BUF_SIZE,
1102 usblp_bulk_read, usblp);
1103
1104 usblp->current_protocol = protocol;
1105 dbg("usblp%d set protocol %d", usblp->minor, protocol);
1106 return 0;
1107}
1108
1109/* Retrieves and caches device ID string.
1110 * Returns length, including length bytes but not null terminator.
1111 * On error, returns a negative errno value. */
1112static int usblp_cache_device_id_string(struct usblp *usblp)
1113{
1114 int err, length;
1115
1116 err = usblp_get_id(usblp, 0, usblp->device_id_string, USBLP_DEVICE_ID_SIZE - 1);
1117 if (err < 0) {
1118 dbg("usblp%d: error = %d reading IEEE-1284 Device ID string",
1119 usblp->minor, err);
1120 usblp->device_id_string[0] = usblp->device_id_string[1] = '\0';
1121 return -EIO;
1122 }
1123
1124 /* First two bytes are length in big-endian.
1125 * They count themselves, and we copy them into
1126 * the user's buffer. */
1127 length = be16_to_cpu(*((__be16 *)usblp->device_id_string));
1128 if (length < 2)
1129 length = 2;
1130 else if (length >= USBLP_DEVICE_ID_SIZE)
1131 length = USBLP_DEVICE_ID_SIZE - 1;
1132 usblp->device_id_string[length] = '\0';
1133
1134 dbg("usblp%d Device ID string [len=%d]=\"%s\"",
1135 usblp->minor, length, &usblp->device_id_string[2]);
1136
1137 return length;
1138}
1139
1140static void usblp_disconnect(struct usb_interface *intf)
1141{
1142 struct usblp *usblp = usb_get_intfdata (intf);
1143
1144 usb_deregister_dev(intf, &usblp_class);
1145
1146 if (!usblp || !usblp->dev) {
1147 err("bogus disconnect");
1148 BUG ();
1149 }
1150
a9714c84
DW		 1151 device_remove_file(&intf->dev, &dev_attr_ieee1284_id);
1152
4186ecf8 1153 mutex_lock (&usblp_mutex);
1da177e4
LT		 1154 down (&usblp->sem);
1155 usblp->present = 0;
1156 usb_set_intfdata (intf, NULL);
1157
1158 usblp_unlink_urbs(usblp);
1159 usb_buffer_free (usblp->dev, USBLP_BUF_SIZE,
1160 usblp->writebuf, usblp->writeurb->transfer_dma);
1161 usb_buffer_free (usblp->dev, USBLP_BUF_SIZE,
1162 usblp->readbuf, usblp->readurb->transfer_dma);
1163 up (&usblp->sem);
1164
1165 if (!usblp->used)
1166 usblp_cleanup (usblp);
4186ecf8 1167 mutex_unlock (&usblp_mutex);
1da177e4
LT		 1168}
1169
1170static struct usb_device_id usblp_ids [] = {
1171 { USB_DEVICE_INFO(7, 1, 1) },
1172 { USB_DEVICE_INFO(7, 1, 2) },
1173 { USB_DEVICE_INFO(7, 1, 3) },
1174 { USB_INTERFACE_INFO(7, 1, 1) },
1175 { USB_INTERFACE_INFO(7, 1, 2) },
1176 { USB_INTERFACE_INFO(7, 1, 3) },
1177 { } /* Terminating entry */
1178};
1179
1180MODULE_DEVICE_TABLE (usb, usblp_ids);
1181
1182static struct usb_driver usblp_driver = {
1da177e4
LT		 1183 .name = "usblp",
1184 .probe = usblp_probe,
1185 .disconnect = usblp_disconnect,
1186 .id_table = usblp_ids,
1187};
1188
1189static int __init usblp_init(void)
1190{
1191 int retval;
1192 retval = usb_register(&usblp_driver);
8e695cdb
ON		 1193 if (!retval)
1194 info(DRIVER_VERSION ": " DRIVER_DESC);
1195
1da177e4
LT		 1196 return retval;
1197}
1198
1199static void __exit usblp_exit(void)
1200{
1201 usb_deregister(&usblp_driver);
1202}
1203
1204module_init(usblp_init);
1205module_exit(usblp_exit);
1206
1207MODULE_AUTHOR( DRIVER_AUTHOR );
1208MODULE_DESCRIPTION( DRIVER_DESC );
1209module_param(proto_bias, int, S_IRUGO | S_IWUSR);
1210MODULE_PARM_DESC(proto_bias, "Favourite protocol number");
1211MODULE_LICENSE("GPL");
Clone of davem's net-next-2.6 tree