4 * Copyright (c) 1999 Michael Gee <michael@linuxspecific.com>
5 * Copyright (c) 1999 Pavel Machek <pavel@suse.cz>
6 * Copyright (c) 2000 Randy Dunlap <rdunlap@xenotime.net>
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>
10 * Copyright (c) 2006 Oliver Neukum <oliver@neukum.name>
12 * USB Printer Device Class driver for USB printers and printer cables
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;
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.
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.
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
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>
58 #include <linux/mutex.h>
60 #include <linux/usb.h>
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"
69 #define USBLP_BUF_SIZE 8192
70 #define USBLP_DEVICE_ID_SIZE 1024
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: */
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);
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):
104 MFG: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: ;
108 * USB Printer Requests
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 */
116 #define USBLP_MINORS 16
117 #define USBLP_MINOR_BASE 0
119 #define USBLP_WRITE_TIMEOUT (5000) /* 5 seconds */
121 #define USBLP_FIRST_PROTOCOL 1
122 #define USBLP_LAST_PROTOCOL 3
123 #define USBLP_MAX_PROTOCOLS (USBLP_LAST_PROTOCOL+1)
126 * some arbitrary status buffer size;
127 * need a status buffer that is allocated via kmalloc(), not on stack
129 #define STATUS_BUF_SIZE 8
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: */
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 */
162 static void usblp_dump(struct usblp
*usblp
) {
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
);
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)");
193 /* Quirks: various printer quirks are handled by this table & its flags. */
195 struct quirk_printer_struct
{
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 */
204 static const struct quirk_printer_struct quirk_printers
[] = {
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) */
221 static int usblp_select_alts(struct usblp
*usblp
);
222 static int usblp_set_protocol(struct usblp
*usblp
, int protocol
);
223 static int usblp_cache_device_id_string(struct usblp
*usblp
);
225 /* forward reference to make our lives easier */
226 static struct usb_driver usblp_driver
;
227 static DEFINE_MUTEX(usblp_mutex
); /* locks the existence of usblp's */
230 * Functions for usblp control messages.
233 static int usblp_ctrl_msg(struct usblp
*usblp
, int request
, int type
, int dir
, int recip
, int value
, void *buf
, int len
)
236 int index
= usblp
->ifnum
;
238 /* High byte has the interface index.
239 Low byte has the alternate setting.
241 if ((request
== USBLP_REQ_GET_ID
) && (type
== USB_TYPE_CLASS
)) {
242 index
= (usblp
->ifnum
<<8)|usblp
->protocol
[usblp
->current_protocol
].alt_setting
;
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;
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)
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)
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.
268 static int proto_bias
= -1;
274 static void usblp_bulk_read(struct urb
*urb
)
276 struct usblp
*usblp
= urb
->context
;
278 if (unlikely(!usblp
|| !usblp
->dev
|| !usblp
->used
))
281 if (unlikely(!usblp
->present
))
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;
288 wake_up_interruptible(&usblp
->wait
);
291 static void usblp_bulk_write(struct urb
*urb
)
293 struct usblp
*usblp
= urb
->context
;
295 if (unlikely(!usblp
|| !usblp
->dev
|| !usblp
->used
))
297 if (unlikely(!usblp
->present
))
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;
304 wake_up_interruptible(&usblp
->wait
);
308 * Get and print printer errors.
311 static const char *usblp_messages
[] = { "ok", "out of paper", "off-line", "on fire" };
313 static int usblp_check_status(struct usblp
*usblp
, int err
)
315 unsigned char status
, newerr
= 0;
318 error
= usblp_read_status (usblp
, usblp
->statusbuf
);
320 if (printk_ratelimit())
321 err("usblp%d: error %d reading printer status",
322 usblp
->minor
, error
);
326 status
= *usblp
->statusbuf
;
328 if (~status
& LP_PERRORP
)
330 if (status
& LP_POUTPA
)
332 if (~status
& LP_PSELECD
)
336 info("usblp%d: %s", usblp
->minor
, usblp_messages
[newerr
]);
345 static int usblp_open(struct inode
*inode
, struct file
*file
)
347 int minor
= iminor(inode
);
349 struct usb_interface
*intf
;
355 mutex_lock (&usblp_mutex
);
358 intf
= usb_find_interface(&usblp_driver
, minor
);
362 usblp
= usb_get_intfdata (intf
);
363 if (!usblp
|| !usblp
->dev
|| !usblp
->present
)
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.
376 if ((retval
= usblp_check_status(usblp
, 0))) {
377 retval
= retval
> 1 ? -EIO
: -ENOSPC
;
385 file
->private_data
= usblp
;
387 usblp
->writeurb
->transfer_buffer_length
= 0;
388 usblp
->wcomplete
= 1; /* we begin writeable */
389 usblp
->rcomplete
= 0;
390 usblp
->writeurb
->status
= 0;
391 usblp
->readurb
->status
= 0;
394 usblp
->readcount
= 0;
395 usblp
->readurb
->dev
= usblp
->dev
;
396 if (usb_submit_urb(usblp
->readurb
, GFP_KERNEL
) < 0) {
399 file
->private_data
= NULL
;
403 mutex_unlock (&usblp_mutex
);
407 static void usblp_cleanup (struct usblp
*usblp
)
409 info("usblp%d: removed", usblp
->minor
);
411 kfree (usblp
->device_id_string
);
412 kfree (usblp
->statusbuf
);
413 usb_free_urb(usblp
->writeurb
);
414 usb_free_urb(usblp
->readurb
);
418 static void usblp_unlink_urbs(struct usblp
*usblp
)
420 usb_kill_urb(usblp
->writeurb
);
422 usb_kill_urb(usblp
->readurb
);
425 static int usblp_release(struct inode
*inode
, struct file
*file
)
427 struct usblp
*usblp
= file
->private_data
;
429 mutex_lock (&usblp_mutex
);
431 if (usblp
->present
) {
432 usblp_unlink_urbs(usblp
);
433 } else /* finish cleanup from disconnect */
434 usblp_cleanup (usblp
);
435 mutex_unlock (&usblp_mutex
);
439 /* No kernel lock - fine */
440 static unsigned int usblp_poll(struct file
*file
, struct poll_table_struct
*wait
)
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
);
448 static long usblp_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
)
450 struct usblp
*usblp
= file
->private_data
;
452 unsigned char newChannel
;
458 if (!usblp
->present
) {
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
) );
466 if (_IOC_TYPE(cmd
) == 'P') /* new-style ioctl number */
468 switch (_IOC_NR(cmd
)) {
470 case IOCNR_GET_DEVICE_ID
: /* get the DEVICE_ID string */
471 if (_IOC_DIR(cmd
) != _IOC_READ
) {
476 length
= usblp_cache_device_id_string(usblp
);
481 if (length
> _IOC_SIZE(cmd
))
482 length
= _IOC_SIZE(cmd
); /* truncate */
484 if (copy_to_user((void __user
*) arg
,
485 usblp
->device_id_string
,
486 (unsigned long) length
)) {
493 case IOCNR_GET_PROTOCOLS
:
494 if (_IOC_DIR(cmd
) != _IOC_READ
||
495 _IOC_SIZE(cmd
) < sizeof(twoints
)) {
500 twoints
[0] = usblp
->current_protocol
;
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
);
508 if (copy_to_user((void __user
*)arg
,
509 (unsigned char *)twoints
,
517 case IOCNR_SET_PROTOCOL
:
518 if (_IOC_DIR(cmd
) != _IOC_WRITE
) {
530 usblp_unlink_urbs(usblp
);
531 retval
= usblp_set_protocol(usblp
, arg
);
533 usblp_set_protocol(usblp
,
534 usblp
->current_protocol
);
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
) {
546 err
= usblp_hp_channel_change_request(usblp
,
549 err("usblp%d: error = %d setting "
556 dbg("usblp%d requested/got HP channel %ld/%d",
557 usblp
->minor
, arg
, newChannel
);
560 case IOCNR_GET_BUS_ADDRESS
:
561 if (_IOC_DIR(cmd
) != _IOC_READ
||
562 _IOC_SIZE(cmd
) < sizeof(twoints
)) {
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
,
576 dbg("usblp%d is bus=%d, device=%d",
577 usblp
->minor
, twoints
[0], twoints
[1]);
580 case IOCNR_GET_VID_PID
:
581 if (_IOC_DIR(cmd
) != _IOC_READ
||
582 _IOC_SIZE(cmd
) < sizeof(twoints
)) {
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
,
596 dbg("usblp%d is VID=0x%4.4X, PID=0x%4.4X",
597 usblp
->minor
, twoints
[0], twoints
[1]);
600 case IOCNR_SOFT_RESET
:
601 if (_IOC_DIR(cmd
) != _IOC_NONE
) {
605 retval
= usblp_reset(usblp
);
610 else /* old-style ioctl value */
614 if (usblp_read_status(usblp
, usblp
->statusbuf
)) {
615 if (printk_ratelimit())
616 err("usblp%d: failed reading printer status",
621 status
= *usblp
->statusbuf
;
622 if (copy_to_user ((void __user
*)arg
, &status
, sizeof(int)))
635 static ssize_t
usblp_write(struct file
*file
, const char __user
*buffer
, size_t count
, loff_t
*ppos
)
637 struct usblp
*usblp
= file
->private_data
;
638 int timeout
, rv
, err
= 0, transfer_length
= 0;
639 size_t writecount
= 0;
641 while (writecount
< count
) {
642 if (!usblp
->wcomplete
) {
644 if (file
->f_flags
& O_NONBLOCK
) {
645 writecount
+= transfer_length
;
646 return writecount
? writecount
: -EAGAIN
;
649 timeout
= USBLP_WRITE_TIMEOUT
;
651 rv
= wait_event_interruptible_timeout(usblp
->wait
, usblp
->wcomplete
|| !usblp
->present
, timeout
);
653 return writecount
? writecount
: -EINTR
;
656 if (!usblp
->present
) {
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
;
668 err
= usblp_check_status(usblp
, err
);
671 /* if the fault was due to disconnect, let khubd's
672 * call to usblp_disconnect() grab usblp->sem ...
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.
682 writecount
+= transfer_length
;
683 if (writecount
== count
) {
688 transfer_length
=(count
- writecount
);
689 if (transfer_length
> USBLP_BUF_SIZE
)
690 transfer_length
= USBLP_BUF_SIZE
;
692 usblp
->writeurb
->transfer_buffer_length
= transfer_length
;
694 if (copy_from_user(usblp
->writeurb
->transfer_buffer
,
695 buffer
+ writecount
, transfer_length
)) {
697 return writecount
? writecount
: -EFAULT
;
700 usblp
->writeurb
->dev
= usblp
->dev
;
701 usblp
->wcomplete
= 0;
702 err
= usb_submit_urb(usblp
->writeurb
, GFP_KERNEL
);
707 count
= writecount
? writecount
: -ENOMEM
;
717 static ssize_t
usblp_read(struct file
*file
, char __user
*buffer
, size_t count
, loff_t
*ppos
)
719 struct usblp
*usblp
= file
->private_data
;
726 if (!usblp
->present
) {
731 if (!usblp
->rcomplete
) {
734 if (file
->f_flags
& O_NONBLOCK
) {
739 rv
= wait_event_interruptible(usblp
->wait
, usblp
->rcomplete
|| !usblp
->present
);
747 if (!usblp
->present
) {
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");
764 count
= count
< usblp
->readurb
->actual_length
- usblp
->readcount
?
765 count
: usblp
->readurb
->actual_length
- usblp
->readcount
;
767 if (copy_to_user(buffer
, usblp
->readurb
->transfer_buffer
+ usblp
->readcount
, count
)) {
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
)) {
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.
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.
804 static unsigned int usblp_quirks (__u16 vendor
, __u16 product
)
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
;
816 static const struct file_operations usblp_fops
= {
817 .owner
= THIS_MODULE
,
819 .write
= usblp_write
,
821 .unlocked_ioctl
= usblp_ioctl
,
822 .compat_ioctl
= usblp_ioctl
,
824 .release
= usblp_release
,
827 static struct usb_class_driver usblp_class
= {
830 .minor_base
= USBLP_MINOR_BASE
,
833 static ssize_t
usblp_show_ieee1284_id(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
835 struct usb_interface
*intf
= to_usb_interface(dev
);
836 struct usblp
*usblp
= usb_get_intfdata (intf
);
838 if (usblp
->device_id_string
[0] == 0 &&
839 usblp
->device_id_string
[1] == 0)
842 return sprintf(buf
, "%s", usblp
->device_id_string
+2);
845 static DEVICE_ATTR(ieee1284_id
, S_IRUGO
, usblp_show_ieee1284_id
, NULL
);
847 static int usblp_probe(struct usb_interface
*intf
,
848 const struct usb_device_id
*id
)
850 struct usb_device
*dev
= interface_to_usbdev (intf
);
851 struct usblp
*usblp
= NULL
;
855 /* Malloc and start initializing usblp structure so we can use it
857 if (!(usblp
= kzalloc(sizeof(struct usblp
), GFP_KERNEL
))) {
858 err("out of memory for usblp");
862 init_MUTEX (&usblp
->sem
);
863 init_waitqueue_head(&usblp
->wait
);
864 usblp
->ifnum
= intf
->cur_altsetting
->desc
.bInterfaceNumber
;
867 usblp
->writeurb
= usb_alloc_urb(0, GFP_KERNEL
);
868 if (!usblp
->writeurb
) {
869 err("out of memory");
872 usblp
->readurb
= usb_alloc_urb(0, GFP_KERNEL
);
873 if (!usblp
->readurb
) {
874 err("out of memory");
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");
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");
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");
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");
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
));
915 /* Analyze and pick initial alternate settings and endpoints. */
916 protocol
= usblp_select_alts(usblp
);
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
));
924 /* Setup the selected alternate setting and endpoints. */
925 if (usblp_set_protocol(usblp
, protocol
) < 0)
928 /* Retrieve and store the device ID string. */
929 usblp_cache_device_id_string(usblp
);
930 retval
= device_create_file(&intf
->dev
, &dev_attr_ieee1284_id
);
935 usblp_check_status(usblp
, 0);
938 usb_set_intfdata (intf
, usblp
);
942 retval
= usb_register_dev(intf
, &usblp_class
);
944 err("Not able to get a minor for this device.");
947 usblp
->minor
= intf
->minor
;
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
,
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
));
960 usb_set_intfdata (intf
, NULL
);
961 device_remove_file(&intf
->dev
, &dev_attr_ieee1284_id
);
965 usb_buffer_free (usblp
->dev
, USBLP_BUF_SIZE
,
966 usblp
->writebuf
, usblp
->writeurb
->transfer_dma
);
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
);
980 * We are a "new" style driver with usb_device_id table,
981 * but our requirements are too intricate for simple match to handle.
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.
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.
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.
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.
996 * If nothing else, we bind to 7/1/1 - the unidirectional interface.
998 static int usblp_select_alts(struct usblp
*usblp
)
1000 struct usb_interface
*if_alt
;
1001 struct usb_host_interface
*ifd
;
1002 struct usb_endpoint_descriptor
*epd
, *epwrite
, *epread
;
1005 if_alt
= usblp
->intf
;
1007 for (p
= 0; p
< USBLP_MAX_PROTOCOLS
; p
++)
1008 usblp
->protocol
[p
].alt_setting
= -1;
1010 /* Find out what we have. */
1011 for (i
= 0; i
< if_alt
->num_altsetting
; i
++) {
1012 ifd
= &if_alt
->altsetting
[i
];
1014 if (ifd
->desc
.bInterfaceClass
!= 7 || ifd
->desc
.bInterfaceSubClass
!= 1)
1017 if (ifd
->desc
.bInterfaceProtocol
< USBLP_FIRST_PROTOCOL
||
1018 ifd
->desc
.bInterfaceProtocol
> USBLP_LAST_PROTOCOL
)
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
;
1026 if (usb_endpoint_is_bulk_out(epd
))
1030 if (usb_endpoint_is_bulk_in(epd
))
1035 /* Ignore buggy hardware without the right endpoints. */
1036 if (!epwrite
|| (ifd
->desc
.bInterfaceProtocol
> 1 && !epread
))
1039 /* Turn off reads for 7/1/1 (unidirectional) interfaces
1040 * and buggy bidirectional printers. */
1041 if (ifd
->desc
.bInterfaceProtocol
== 1) {
1043 } else if (usblp
->quirks
& USBLP_QUIRK_BIDIR
) {
1044 info("Disabling reads from problem bidirectional "
1045 "printer on usblp%d", usblp
->minor
);
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
;
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)
1061 /* Ordering is important here. */
1062 if (usblp
->protocol
[2].alt_setting
!= -1)
1064 if (usblp
->protocol
[1].alt_setting
!= -1)
1066 if (usblp
->protocol
[3].alt_setting
!= -1)
1069 /* If nothing is available, then don't bind to this device. */
1073 static int usblp_set_protocol(struct usblp
*usblp
, int protocol
)
1077 if (protocol
< USBLP_FIRST_PROTOCOL
|| protocol
> USBLP_LAST_PROTOCOL
)
1080 alts
= usblp
->protocol
[protocol
].alt_setting
;
1083 r
= usb_set_interface(usblp
->dev
, usblp
->ifnum
, alts
);
1085 err("can't set desired altsetting %d on interface %d",
1086 alts
, usblp
->ifnum
);
1090 usb_fill_bulk_urb(usblp
->writeurb
, usblp
->dev
,
1091 usb_sndbulkpipe(usblp
->dev
,
1092 usblp
->protocol
[protocol
].epwrite
->bEndpointAddress
),
1094 usblp_bulk_write
, usblp
);
1096 usblp
->bidir
= (usblp
->protocol
[protocol
].epread
!= NULL
);
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
);
1104 usblp
->current_protocol
= protocol
;
1105 dbg("usblp%d set protocol %d", usblp
->minor
, protocol
);
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. */
1112 static int usblp_cache_device_id_string(struct usblp
*usblp
)
1116 err
= usblp_get_id(usblp
, 0, usblp
->device_id_string
, USBLP_DEVICE_ID_SIZE
- 1);
1118 dbg("usblp%d: error = %d reading IEEE-1284 Device ID string",
1120 usblp
->device_id_string
[0] = usblp
->device_id_string
[1] = '\0';
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
));
1130 else if (length
>= USBLP_DEVICE_ID_SIZE
)
1131 length
= USBLP_DEVICE_ID_SIZE
- 1;
1132 usblp
->device_id_string
[length
] = '\0';
1134 dbg("usblp%d Device ID string [len=%d]=\"%s\"",
1135 usblp
->minor
, length
, &usblp
->device_id_string
[2]);
1140 static void usblp_disconnect(struct usb_interface
*intf
)
1142 struct usblp
*usblp
= usb_get_intfdata (intf
);
1144 usb_deregister_dev(intf
, &usblp_class
);
1146 if (!usblp
|| !usblp
->dev
) {
1147 err("bogus disconnect");
1151 device_remove_file(&intf
->dev
, &dev_attr_ieee1284_id
);
1153 mutex_lock (&usblp_mutex
);
1156 usb_set_intfdata (intf
, NULL
);
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
);
1166 usblp_cleanup (usblp
);
1167 mutex_unlock (&usblp_mutex
);
1170 static 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 */
1180 MODULE_DEVICE_TABLE (usb
, usblp_ids
);
1182 static struct usb_driver usblp_driver
= {
1184 .probe
= usblp_probe
,
1185 .disconnect
= usblp_disconnect
,
1186 .id_table
= usblp_ids
,
1189 static int __init
usblp_init(void)
1192 retval
= usb_register(&usblp_driver
);
1194 info(DRIVER_VERSION
": " DRIVER_DESC
);
1199 static void __exit
usblp_exit(void)
1201 usb_deregister(&usblp_driver
);
1204 module_init(usblp_init
);
1205 module_exit(usblp_exit
);
1207 MODULE_AUTHOR( DRIVER_AUTHOR
);
1208 MODULE_DESCRIPTION( DRIVER_DESC
);
1209 module_param(proto_bias
, int, S_IRUGO
| S_IWUSR
);
1210 MODULE_PARM_DESC(proto_bias
, "Favourite protocol number");
1211 MODULE_LICENSE("GPL");