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 mutex mut
; /* 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 sleeping
; /* interface is suspended */
158 unsigned char *device_id_string
; /* IEEE 1284 DEVICE ID string (ptr) */
159 /* first 2 bytes are (big-endian) length */
163 static void usblp_dump(struct usblp
*usblp
) {
166 dbg("usblp=0x%p", usblp
);
167 dbg("dev=0x%p", usblp
->dev
);
168 dbg("present=%d", usblp
->present
);
169 dbg("readbuf=0x%p", usblp
->readbuf
);
170 dbg("writebuf=0x%p", usblp
->writebuf
);
171 dbg("readurb=0x%p", usblp
->readurb
);
172 dbg("writeurb=0x%p", usblp
->writeurb
);
173 dbg("readcount=%d", usblp
->readcount
);
174 dbg("ifnum=%d", usblp
->ifnum
);
175 for (p
= USBLP_FIRST_PROTOCOL
; p
<= USBLP_LAST_PROTOCOL
; p
++) {
176 dbg("protocol[%d].alt_setting=%d", p
, usblp
->protocol
[p
].alt_setting
);
177 dbg("protocol[%d].epwrite=%p", p
, usblp
->protocol
[p
].epwrite
);
178 dbg("protocol[%d].epread=%p", p
, usblp
->protocol
[p
].epread
);
180 dbg("current_protocol=%d", usblp
->current_protocol
);
181 dbg("minor=%d", usblp
->minor
);
182 dbg("wcomplete=%d", usblp
->wcomplete
);
183 dbg("rcomplete=%d", usblp
->rcomplete
);
184 dbg("quirks=%d", usblp
->quirks
);
185 dbg("used=%d", usblp
->used
);
186 dbg("bidir=%d", usblp
->bidir
);
187 dbg("sleeping=%d", usblp
->sleeping
);
188 dbg("device_id_string=\"%s\"",
189 usblp
->device_id_string
?
190 usblp
->device_id_string
+ 2 :
191 (unsigned char *)"(null)");
195 /* Quirks: various printer quirks are handled by this table & its flags. */
197 struct quirk_printer_struct
{
203 #define USBLP_QUIRK_BIDIR 0x1 /* reports bidir but requires unidirectional mode (no INs/reads) */
204 #define USBLP_QUIRK_USB_INIT 0x2 /* needs vendor USB init string */
206 static const struct quirk_printer_struct quirk_printers
[] = {
207 { 0x03f0, 0x0004, USBLP_QUIRK_BIDIR
}, /* HP DeskJet 895C */
208 { 0x03f0, 0x0104, USBLP_QUIRK_BIDIR
}, /* HP DeskJet 880C */
209 { 0x03f0, 0x0204, USBLP_QUIRK_BIDIR
}, /* HP DeskJet 815C */
210 { 0x03f0, 0x0304, USBLP_QUIRK_BIDIR
}, /* HP DeskJet 810C/812C */
211 { 0x03f0, 0x0404, USBLP_QUIRK_BIDIR
}, /* HP DeskJet 830C */
212 { 0x03f0, 0x0504, USBLP_QUIRK_BIDIR
}, /* HP DeskJet 885C */
213 { 0x03f0, 0x0604, USBLP_QUIRK_BIDIR
}, /* HP DeskJet 840C */
214 { 0x03f0, 0x0804, USBLP_QUIRK_BIDIR
}, /* HP DeskJet 816C */
215 { 0x03f0, 0x1104, USBLP_QUIRK_BIDIR
}, /* HP Deskjet 959C */
216 { 0x0409, 0xefbe, USBLP_QUIRK_BIDIR
}, /* NEC Picty900 (HP OEM) */
217 { 0x0409, 0xbef4, USBLP_QUIRK_BIDIR
}, /* NEC Picty760 (HP OEM) */
218 { 0x0409, 0xf0be, USBLP_QUIRK_BIDIR
}, /* NEC Picty920 (HP OEM) */
219 { 0x0409, 0xf1be, USBLP_QUIRK_BIDIR
}, /* NEC Picty800 (HP OEM) */
220 { 0x0482, 0x0010, USBLP_QUIRK_BIDIR
}, /* Kyocera Mita FS 820, by zut <kernel@zut.de> */
224 static int usblp_select_alts(struct usblp
*usblp
);
225 static int usblp_set_protocol(struct usblp
*usblp
, int protocol
);
226 static int usblp_cache_device_id_string(struct usblp
*usblp
);
228 /* forward reference to make our lives easier */
229 static struct usb_driver usblp_driver
;
230 static DEFINE_MUTEX(usblp_mutex
); /* locks the existence of usblp's */
233 * Functions for usblp control messages.
236 static int usblp_ctrl_msg(struct usblp
*usblp
, int request
, int type
, int dir
, int recip
, int value
, void *buf
, int len
)
239 int index
= usblp
->ifnum
;
241 /* High byte has the interface index.
242 Low byte has the alternate setting.
244 if ((request
== USBLP_REQ_GET_ID
) && (type
== USB_TYPE_CLASS
)) {
245 index
= (usblp
->ifnum
<<8)|usblp
->protocol
[usblp
->current_protocol
].alt_setting
;
248 retval
= usb_control_msg(usblp
->dev
,
249 dir
? usb_rcvctrlpipe(usblp
->dev
, 0) : usb_sndctrlpipe(usblp
->dev
, 0),
250 request
, type
| dir
| recip
, value
, index
, buf
, len
, USBLP_WRITE_TIMEOUT
);
251 dbg("usblp_control_msg: rq: 0x%02x dir: %d recip: %d value: %d idx: %d len: %#x result: %d",
252 request
, !!dir
, recip
, value
, index
, len
, retval
);
253 return retval
< 0 ? retval
: 0;
256 #define usblp_read_status(usblp, status)\
257 usblp_ctrl_msg(usblp, USBLP_REQ_GET_STATUS, USB_TYPE_CLASS, USB_DIR_IN, USB_RECIP_INTERFACE, 0, status, 1)
258 #define usblp_get_id(usblp, config, id, maxlen)\
259 usblp_ctrl_msg(usblp, USBLP_REQ_GET_ID, USB_TYPE_CLASS, USB_DIR_IN, USB_RECIP_INTERFACE, config, id, maxlen)
260 #define usblp_reset(usblp)\
261 usblp_ctrl_msg(usblp, USBLP_REQ_RESET, USB_TYPE_CLASS, USB_DIR_OUT, USB_RECIP_OTHER, 0, NULL, 0)
263 #define usblp_hp_channel_change_request(usblp, channel, buffer) \
264 usblp_ctrl_msg(usblp, USBLP_REQ_HP_CHANNEL_CHANGE_REQUEST, USB_TYPE_VENDOR, USB_DIR_IN, USB_RECIP_INTERFACE, channel, buffer, 1)
267 * See the description for usblp_select_alts() below for the usage
268 * explanation. Look into your /proc/bus/usb/devices and dmesg in
269 * case of any trouble.
271 static int proto_bias
= -1;
277 static void usblp_bulk_read(struct urb
*urb
)
279 struct usblp
*usblp
= urb
->context
;
281 if (unlikely(!usblp
|| !usblp
->dev
|| !usblp
->used
))
284 if (unlikely(!usblp
->present
))
286 if (unlikely(urb
->status
))
287 warn("usblp%d: nonzero read/write bulk status received: %d",
288 usblp
->minor
, urb
->status
);
289 usblp
->rcomplete
= 1;
291 wake_up_interruptible(&usblp
->wait
);
294 static void usblp_bulk_write(struct urb
*urb
)
296 struct usblp
*usblp
= urb
->context
;
298 if (unlikely(!usblp
|| !usblp
->dev
|| !usblp
->used
))
300 if (unlikely(!usblp
->present
))
302 if (unlikely(urb
->status
))
303 warn("usblp%d: nonzero read/write bulk status received: %d",
304 usblp
->minor
, urb
->status
);
305 usblp
->wcomplete
= 1;
307 wake_up_interruptible(&usblp
->wait
);
311 * Get and print printer errors.
314 static const char *usblp_messages
[] = { "ok", "out of paper", "off-line", "on fire" };
316 static int usblp_check_status(struct usblp
*usblp
, int err
)
318 unsigned char status
, newerr
= 0;
321 error
= usblp_read_status (usblp
, usblp
->statusbuf
);
323 if (printk_ratelimit())
324 err("usblp%d: error %d reading printer status",
325 usblp
->minor
, error
);
329 status
= *usblp
->statusbuf
;
331 if (~status
& LP_PERRORP
)
333 if (status
& LP_POUTPA
)
335 if (~status
& LP_PSELECD
)
339 info("usblp%d: %s", usblp
->minor
, usblp_messages
[newerr
]);
344 static int handle_bidir (struct usblp
*usblp
)
346 if (usblp
->bidir
&& usblp
->used
&& !usblp
->sleeping
) {
347 usblp
->readcount
= 0;
348 usblp
->readurb
->dev
= usblp
->dev
;
349 if (usb_submit_urb(usblp
->readurb
, GFP_KERNEL
) < 0) {
362 static int usblp_open(struct inode
*inode
, struct file
*file
)
364 int minor
= iminor(inode
);
366 struct usb_interface
*intf
;
372 mutex_lock (&usblp_mutex
);
375 intf
= usb_find_interface(&usblp_driver
, minor
);
379 usblp
= usb_get_intfdata (intf
);
380 if (!usblp
|| !usblp
->dev
|| !usblp
->present
)
388 * TODO: need to implement LP_ABORTOPEN + O_NONBLOCK as in drivers/char/lp.c ???
389 * This is #if 0-ed because we *don't* want to fail an open
390 * just because the printer is off-line.
393 if ((retval
= usblp_check_status(usblp
, 0))) {
394 retval
= retval
> 1 ? -EIO
: -ENOSPC
;
401 retval
= usb_autopm_get_interface(intf
);
405 file
->private_data
= usblp
;
407 usblp
->writeurb
->transfer_buffer_length
= 0;
408 usblp
->wcomplete
= 1; /* we begin writeable */
409 usblp
->rcomplete
= 0;
410 usblp
->writeurb
->status
= 0;
411 usblp
->readurb
->status
= 0;
413 if (handle_bidir(usblp
) < 0) {
414 file
->private_data
= NULL
;
418 mutex_unlock (&usblp_mutex
);
422 static void usblp_cleanup (struct usblp
*usblp
)
424 info("usblp%d: removed", usblp
->minor
);
426 kfree (usblp
->device_id_string
);
427 kfree (usblp
->statusbuf
);
428 usb_free_urb(usblp
->writeurb
);
429 usb_free_urb(usblp
->readurb
);
433 static void usblp_unlink_urbs(struct usblp
*usblp
)
435 usb_kill_urb(usblp
->writeurb
);
437 usb_kill_urb(usblp
->readurb
);
440 static int usblp_release(struct inode
*inode
, struct file
*file
)
442 struct usblp
*usblp
= file
->private_data
;
444 mutex_lock (&usblp_mutex
);
446 if (usblp
->present
) {
447 usblp_unlink_urbs(usblp
);
448 usb_autopm_put_interface(usblp
->intf
);
449 } else /* finish cleanup from disconnect */
450 usblp_cleanup (usblp
);
451 mutex_unlock (&usblp_mutex
);
455 /* No kernel lock - fine */
456 static unsigned int usblp_poll(struct file
*file
, struct poll_table_struct
*wait
)
458 struct usblp
*usblp
= file
->private_data
;
459 poll_wait(file
, &usblp
->wait
, wait
);
460 return ((!usblp
->bidir
|| !usblp
->rcomplete
) ? 0 : POLLIN
| POLLRDNORM
)
461 | (!usblp
->wcomplete
? 0 : POLLOUT
| POLLWRNORM
);
464 static long usblp_ioctl(struct file
*file
, unsigned int cmd
, unsigned long arg
)
466 struct usblp
*usblp
= file
->private_data
;
468 unsigned char newChannel
;
473 mutex_lock (&usblp
->mut
);
474 if (!usblp
->present
) {
479 if (usblp
->sleeping
) {
484 dbg("usblp_ioctl: cmd=0x%x (%c nr=%d len=%d dir=%d)", cmd
, _IOC_TYPE(cmd
),
485 _IOC_NR(cmd
), _IOC_SIZE(cmd
), _IOC_DIR(cmd
) );
487 if (_IOC_TYPE(cmd
) == 'P') /* new-style ioctl number */
489 switch (_IOC_NR(cmd
)) {
491 case IOCNR_GET_DEVICE_ID
: /* get the DEVICE_ID string */
492 if (_IOC_DIR(cmd
) != _IOC_READ
) {
497 length
= usblp_cache_device_id_string(usblp
);
502 if (length
> _IOC_SIZE(cmd
))
503 length
= _IOC_SIZE(cmd
); /* truncate */
505 if (copy_to_user((void __user
*) arg
,
506 usblp
->device_id_string
,
507 (unsigned long) length
)) {
514 case IOCNR_GET_PROTOCOLS
:
515 if (_IOC_DIR(cmd
) != _IOC_READ
||
516 _IOC_SIZE(cmd
) < sizeof(twoints
)) {
521 twoints
[0] = usblp
->current_protocol
;
523 for (i
= USBLP_FIRST_PROTOCOL
;
524 i
<= USBLP_LAST_PROTOCOL
; i
++) {
525 if (usblp
->protocol
[i
].alt_setting
>= 0)
526 twoints
[1] |= (1<<i
);
529 if (copy_to_user((void __user
*)arg
,
530 (unsigned char *)twoints
,
538 case IOCNR_SET_PROTOCOL
:
539 if (_IOC_DIR(cmd
) != _IOC_WRITE
) {
551 usblp_unlink_urbs(usblp
);
552 retval
= usblp_set_protocol(usblp
, arg
);
554 usblp_set_protocol(usblp
,
555 usblp
->current_protocol
);
559 case IOCNR_HP_SET_CHANNEL
:
560 if (_IOC_DIR(cmd
) != _IOC_WRITE
||
561 le16_to_cpu(usblp
->dev
->descriptor
.idVendor
) != 0x03F0 ||
562 usblp
->quirks
& USBLP_QUIRK_BIDIR
) {
567 err
= usblp_hp_channel_change_request(usblp
,
570 err("usblp%d: error = %d setting "
577 dbg("usblp%d requested/got HP channel %ld/%d",
578 usblp
->minor
, arg
, newChannel
);
581 case IOCNR_GET_BUS_ADDRESS
:
582 if (_IOC_DIR(cmd
) != _IOC_READ
||
583 _IOC_SIZE(cmd
) < sizeof(twoints
)) {
588 twoints
[0] = usblp
->dev
->bus
->busnum
;
589 twoints
[1] = usblp
->dev
->devnum
;
590 if (copy_to_user((void __user
*)arg
,
591 (unsigned char *)twoints
,
597 dbg("usblp%d is bus=%d, device=%d",
598 usblp
->minor
, twoints
[0], twoints
[1]);
601 case IOCNR_GET_VID_PID
:
602 if (_IOC_DIR(cmd
) != _IOC_READ
||
603 _IOC_SIZE(cmd
) < sizeof(twoints
)) {
608 twoints
[0] = le16_to_cpu(usblp
->dev
->descriptor
.idVendor
);
609 twoints
[1] = le16_to_cpu(usblp
->dev
->descriptor
.idProduct
);
610 if (copy_to_user((void __user
*)arg
,
611 (unsigned char *)twoints
,
617 dbg("usblp%d is VID=0x%4.4X, PID=0x%4.4X",
618 usblp
->minor
, twoints
[0], twoints
[1]);
621 case IOCNR_SOFT_RESET
:
622 if (_IOC_DIR(cmd
) != _IOC_NONE
) {
626 retval
= usblp_reset(usblp
);
631 else /* old-style ioctl value */
635 if (usblp_read_status(usblp
, usblp
->statusbuf
)) {
636 if (printk_ratelimit())
637 err("usblp%d: failed reading printer status",
642 status
= *usblp
->statusbuf
;
643 if (copy_to_user ((void __user
*)arg
, &status
, sizeof(int)))
652 mutex_unlock (&usblp
->mut
);
656 static ssize_t
usblp_write(struct file
*file
, const char __user
*buffer
, size_t count
, loff_t
*ppos
)
658 struct usblp
*usblp
= file
->private_data
;
659 int timeout
, intr
, rv
, err
= 0, transfer_length
= 0;
660 size_t writecount
= 0;
662 while (writecount
< count
) {
663 if (!usblp
->wcomplete
) {
665 if (file
->f_flags
& O_NONBLOCK
) {
666 writecount
+= transfer_length
;
667 return writecount
? writecount
: -EAGAIN
;
670 timeout
= USBLP_WRITE_TIMEOUT
;
672 rv
= wait_event_interruptible_timeout(usblp
->wait
, usblp
->wcomplete
|| !usblp
->present
, timeout
);
674 return writecount
? writecount
: -EINTR
;
676 intr
= mutex_lock_interruptible (&usblp
->mut
);
678 return writecount
? writecount
: -EINTR
;
679 if (!usblp
->present
) {
680 mutex_unlock (&usblp
->mut
);
684 if (usblp
->sleeping
) {
685 mutex_unlock (&usblp
->mut
);
686 return writecount
? writecount
: -ENODEV
;
689 if (usblp
->writeurb
->status
!= 0) {
690 if (usblp
->quirks
& USBLP_QUIRK_BIDIR
) {
691 if (!usblp
->wcomplete
)
692 err("usblp%d: error %d writing to printer",
693 usblp
->minor
, usblp
->writeurb
->status
);
694 err
= usblp
->writeurb
->status
;
696 err
= usblp_check_status(usblp
, err
);
697 mutex_unlock (&usblp
->mut
);
699 /* if the fault was due to disconnect, let khubd's
700 * call to usblp_disconnect() grab usblp->mut ...
706 /* We must increment writecount here, and not at the
707 * end of the loop. Otherwise, the final loop iteration may
708 * be skipped, leading to incomplete printer output.
710 writecount
+= transfer_length
;
711 if (writecount
== count
) {
712 mutex_unlock(&usblp
->mut
);
716 transfer_length
=(count
- writecount
);
717 if (transfer_length
> USBLP_BUF_SIZE
)
718 transfer_length
= USBLP_BUF_SIZE
;
720 usblp
->writeurb
->transfer_buffer_length
= transfer_length
;
722 if (copy_from_user(usblp
->writeurb
->transfer_buffer
,
723 buffer
+ writecount
, transfer_length
)) {
724 mutex_unlock(&usblp
->mut
);
725 return writecount
? writecount
: -EFAULT
;
728 usblp
->writeurb
->dev
= usblp
->dev
;
729 usblp
->wcomplete
= 0;
730 err
= usb_submit_urb(usblp
->writeurb
, GFP_KERNEL
);
732 usblp
->wcomplete
= 1;
736 count
= writecount
? writecount
: -ENOMEM
;
737 mutex_unlock (&usblp
->mut
);
740 mutex_unlock (&usblp
->mut
);
746 static ssize_t
usblp_read(struct file
*file
, char __user
*buffer
, size_t count
, loff_t
*ppos
)
748 struct usblp
*usblp
= file
->private_data
;
754 intr
= mutex_lock_interruptible (&usblp
->mut
);
757 if (!usblp
->present
) {
762 if (!usblp
->rcomplete
) {
765 if (file
->f_flags
& O_NONBLOCK
) {
769 mutex_unlock(&usblp
->mut
);
770 rv
= wait_event_interruptible(usblp
->wait
, usblp
->rcomplete
|| !usblp
->present
);
771 mutex_lock(&usblp
->mut
);
778 if (!usblp
->present
) {
783 if (usblp
->sleeping
) {
788 if (usblp
->readurb
->status
) {
789 err("usblp%d: error %d reading from printer",
790 usblp
->minor
, usblp
->readurb
->status
);
791 usblp
->readurb
->dev
= usblp
->dev
;
792 usblp
->readcount
= 0;
793 usblp
->rcomplete
= 0;
794 if (usb_submit_urb(usblp
->readurb
, GFP_KERNEL
) < 0)
795 dbg("error submitting urb");
800 count
= count
< usblp
->readurb
->actual_length
- usblp
->readcount
?
801 count
: usblp
->readurb
->actual_length
- usblp
->readcount
;
803 if (copy_to_user(buffer
, usblp
->readurb
->transfer_buffer
+ usblp
->readcount
, count
)) {
808 if ((usblp
->readcount
+= count
) == usblp
->readurb
->actual_length
) {
809 usblp
->readcount
= 0;
810 usblp
->readurb
->dev
= usblp
->dev
;
811 usblp
->rcomplete
= 0;
812 if (usb_submit_urb(usblp
->readurb
, GFP_KERNEL
)) {
819 mutex_unlock (&usblp
->mut
);
824 * Checks for printers that have quirks, such as requiring unidirectional
825 * communication but reporting bidirectional; currently some HP printers
826 * have this flaw (HP 810, 880, 895, etc.), or needing an init string
827 * sent at each open (like some Epsons).
828 * Returns 1 if found, 0 if not found.
830 * HP recommended that we use the bidirectional interface but
831 * don't attempt any bulk IN transfers from the IN endpoint.
832 * Here's some more detail on the problem:
833 * The problem is not that it isn't bidirectional though. The problem
834 * is that if you request a device ID, or status information, while
835 * the buffers are full, the return data will end up in the print data
836 * buffer. For example if you make sure you never request the device ID
837 * while you are sending print data, and you don't try to query the
838 * printer status every couple of milliseconds, you will probably be OK.
840 static unsigned int usblp_quirks (__u16 vendor
, __u16 product
)
844 for (i
= 0; quirk_printers
[i
].vendorId
; i
++) {
845 if (vendor
== quirk_printers
[i
].vendorId
&&
846 product
== quirk_printers
[i
].productId
)
847 return quirk_printers
[i
].quirks
;
852 static const struct file_operations usblp_fops
= {
853 .owner
= THIS_MODULE
,
855 .write
= usblp_write
,
857 .unlocked_ioctl
= usblp_ioctl
,
858 .compat_ioctl
= usblp_ioctl
,
860 .release
= usblp_release
,
863 static struct usb_class_driver usblp_class
= {
866 .minor_base
= USBLP_MINOR_BASE
,
869 static ssize_t
usblp_show_ieee1284_id(struct device
*dev
, struct device_attribute
*attr
, char *buf
)
871 struct usb_interface
*intf
= to_usb_interface(dev
);
872 struct usblp
*usblp
= usb_get_intfdata (intf
);
874 if (usblp
->device_id_string
[0] == 0 &&
875 usblp
->device_id_string
[1] == 0)
878 return sprintf(buf
, "%s", usblp
->device_id_string
+2);
881 static DEVICE_ATTR(ieee1284_id
, S_IRUGO
, usblp_show_ieee1284_id
, NULL
);
883 static int usblp_probe(struct usb_interface
*intf
,
884 const struct usb_device_id
*id
)
886 struct usb_device
*dev
= interface_to_usbdev (intf
);
887 struct usblp
*usblp
= NULL
;
891 /* Malloc and start initializing usblp structure so we can use it
893 if (!(usblp
= kzalloc(sizeof(struct usblp
), GFP_KERNEL
))) {
894 err("out of memory for usblp");
898 mutex_init (&usblp
->mut
);
899 init_waitqueue_head(&usblp
->wait
);
900 usblp
->ifnum
= intf
->cur_altsetting
->desc
.bInterfaceNumber
;
903 usblp
->writeurb
= usb_alloc_urb(0, GFP_KERNEL
);
904 if (!usblp
->writeurb
) {
905 err("out of memory");
908 usblp
->readurb
= usb_alloc_urb(0, GFP_KERNEL
);
909 if (!usblp
->readurb
) {
910 err("out of memory");
914 /* Malloc device ID string buffer to the largest expected length,
915 * since we can re-query it on an ioctl and a dynamic string
916 * could change in length. */
917 if (!(usblp
->device_id_string
= kmalloc(USBLP_DEVICE_ID_SIZE
, GFP_KERNEL
))) {
918 err("out of memory for device_id_string");
922 usblp
->writebuf
= usblp
->readbuf
= NULL
;
923 usblp
->writeurb
->transfer_flags
= URB_NO_TRANSFER_DMA_MAP
;
924 usblp
->readurb
->transfer_flags
= URB_NO_TRANSFER_DMA_MAP
;
925 /* Malloc write & read buffers. We somewhat wastefully
926 * malloc both regardless of bidirectionality, because the
927 * alternate setting can be changed later via an ioctl. */
928 if (!(usblp
->writebuf
= usb_buffer_alloc(dev
, USBLP_BUF_SIZE
,
929 GFP_KERNEL
, &usblp
->writeurb
->transfer_dma
))) {
930 err("out of memory for write buf");
933 if (!(usblp
->readbuf
= usb_buffer_alloc(dev
, USBLP_BUF_SIZE
,
934 GFP_KERNEL
, &usblp
->readurb
->transfer_dma
))) {
935 err("out of memory for read buf");
939 /* Allocate buffer for printer status */
940 usblp
->statusbuf
= kmalloc(STATUS_BUF_SIZE
, GFP_KERNEL
);
941 if (!usblp
->statusbuf
) {
942 err("out of memory for statusbuf");
946 /* Lookup quirks for this printer. */
947 usblp
->quirks
= usblp_quirks(
948 le16_to_cpu(dev
->descriptor
.idVendor
),
949 le16_to_cpu(dev
->descriptor
.idProduct
));
951 /* Analyze and pick initial alternate settings and endpoints. */
952 protocol
= usblp_select_alts(usblp
);
954 dbg("incompatible printer-class device 0x%4.4X/0x%4.4X",
955 le16_to_cpu(dev
->descriptor
.idVendor
),
956 le16_to_cpu(dev
->descriptor
.idProduct
));
960 /* Setup the selected alternate setting and endpoints. */
961 if (usblp_set_protocol(usblp
, protocol
) < 0)
964 /* Retrieve and store the device ID string. */
965 usblp_cache_device_id_string(usblp
);
966 retval
= device_create_file(&intf
->dev
, &dev_attr_ieee1284_id
);
971 usblp_check_status(usblp
, 0);
974 usb_set_intfdata (intf
, usblp
);
978 retval
= usb_register_dev(intf
, &usblp_class
);
980 err("Not able to get a minor for this device.");
983 usblp
->minor
= intf
->minor
;
984 info("usblp%d: USB %sdirectional printer dev %d "
985 "if %d alt %d proto %d vid 0x%4.4X pid 0x%4.4X",
986 usblp
->minor
, usblp
->bidir
? "Bi" : "Uni", dev
->devnum
,
988 usblp
->protocol
[usblp
->current_protocol
].alt_setting
,
989 usblp
->current_protocol
,
990 le16_to_cpu(usblp
->dev
->descriptor
.idVendor
),
991 le16_to_cpu(usblp
->dev
->descriptor
.idProduct
));
996 usb_set_intfdata (intf
, NULL
);
997 device_remove_file(&intf
->dev
, &dev_attr_ieee1284_id
);
1000 if (usblp
->writebuf
)
1001 usb_buffer_free (usblp
->dev
, USBLP_BUF_SIZE
,
1002 usblp
->writebuf
, usblp
->writeurb
->transfer_dma
);
1004 usb_buffer_free (usblp
->dev
, USBLP_BUF_SIZE
,
1005 usblp
->readbuf
, usblp
->writeurb
->transfer_dma
);
1006 kfree(usblp
->statusbuf
);
1007 kfree(usblp
->device_id_string
);
1008 usb_free_urb(usblp
->writeurb
);
1009 usb_free_urb(usblp
->readurb
);
1016 * We are a "new" style driver with usb_device_id table,
1017 * but our requirements are too intricate for simple match to handle.
1019 * The "proto_bias" option may be used to specify the preferred protocol
1020 * for all USB printers (1=7/1/1, 2=7/1/2, 3=7/1/3). If the device
1021 * supports the preferred protocol, then we bind to it.
1023 * The best interface for us is 7/1/2, because it is compatible
1024 * with a stream of characters. If we find it, we bind to it.
1026 * Note that the people from hpoj.sourceforge.net need to be able to
1027 * bind to 7/1/3 (MLC/1284.4), so we provide them ioctls for this purpose.
1029 * Failing 7/1/2, we look for 7/1/3, even though it's probably not
1030 * stream-compatible, because this matches the behaviour of the old code.
1032 * If nothing else, we bind to 7/1/1 - the unidirectional interface.
1034 static int usblp_select_alts(struct usblp
*usblp
)
1036 struct usb_interface
*if_alt
;
1037 struct usb_host_interface
*ifd
;
1038 struct usb_endpoint_descriptor
*epd
, *epwrite
, *epread
;
1041 if_alt
= usblp
->intf
;
1043 for (p
= 0; p
< USBLP_MAX_PROTOCOLS
; p
++)
1044 usblp
->protocol
[p
].alt_setting
= -1;
1046 /* Find out what we have. */
1047 for (i
= 0; i
< if_alt
->num_altsetting
; i
++) {
1048 ifd
= &if_alt
->altsetting
[i
];
1050 if (ifd
->desc
.bInterfaceClass
!= 7 || ifd
->desc
.bInterfaceSubClass
!= 1)
1053 if (ifd
->desc
.bInterfaceProtocol
< USBLP_FIRST_PROTOCOL
||
1054 ifd
->desc
.bInterfaceProtocol
> USBLP_LAST_PROTOCOL
)
1057 /* Look for bulk OUT and IN endpoints. */
1058 epwrite
= epread
= NULL
;
1059 for (e
= 0; e
< ifd
->desc
.bNumEndpoints
; e
++) {
1060 epd
= &ifd
->endpoint
[e
].desc
;
1062 if (usb_endpoint_is_bulk_out(epd
))
1066 if (usb_endpoint_is_bulk_in(epd
))
1071 /* Ignore buggy hardware without the right endpoints. */
1072 if (!epwrite
|| (ifd
->desc
.bInterfaceProtocol
> 1 && !epread
))
1075 /* Turn off reads for 7/1/1 (unidirectional) interfaces
1076 * and buggy bidirectional printers. */
1077 if (ifd
->desc
.bInterfaceProtocol
== 1) {
1079 } else if (usblp
->quirks
& USBLP_QUIRK_BIDIR
) {
1080 info("Disabling reads from problem bidirectional "
1081 "printer on usblp%d", usblp
->minor
);
1085 usblp
->protocol
[ifd
->desc
.bInterfaceProtocol
].alt_setting
=
1086 ifd
->desc
.bAlternateSetting
;
1087 usblp
->protocol
[ifd
->desc
.bInterfaceProtocol
].epwrite
= epwrite
;
1088 usblp
->protocol
[ifd
->desc
.bInterfaceProtocol
].epread
= epread
;
1091 /* If our requested protocol is supported, then use it. */
1092 if (proto_bias
>= USBLP_FIRST_PROTOCOL
&&
1093 proto_bias
<= USBLP_LAST_PROTOCOL
&&
1094 usblp
->protocol
[proto_bias
].alt_setting
!= -1)
1097 /* Ordering is important here. */
1098 if (usblp
->protocol
[2].alt_setting
!= -1)
1100 if (usblp
->protocol
[1].alt_setting
!= -1)
1102 if (usblp
->protocol
[3].alt_setting
!= -1)
1105 /* If nothing is available, then don't bind to this device. */
1109 static int usblp_set_protocol(struct usblp
*usblp
, int protocol
)
1113 if (protocol
< USBLP_FIRST_PROTOCOL
|| protocol
> USBLP_LAST_PROTOCOL
)
1116 alts
= usblp
->protocol
[protocol
].alt_setting
;
1119 r
= usb_set_interface(usblp
->dev
, usblp
->ifnum
, alts
);
1121 err("can't set desired altsetting %d on interface %d",
1122 alts
, usblp
->ifnum
);
1126 usb_fill_bulk_urb(usblp
->writeurb
, usblp
->dev
,
1127 usb_sndbulkpipe(usblp
->dev
,
1128 usblp
->protocol
[protocol
].epwrite
->bEndpointAddress
),
1130 usblp_bulk_write
, usblp
);
1132 usblp
->bidir
= (usblp
->protocol
[protocol
].epread
!= NULL
);
1134 usb_fill_bulk_urb(usblp
->readurb
, usblp
->dev
,
1135 usb_rcvbulkpipe(usblp
->dev
,
1136 usblp
->protocol
[protocol
].epread
->bEndpointAddress
),
1137 usblp
->readbuf
, USBLP_BUF_SIZE
,
1138 usblp_bulk_read
, usblp
);
1140 usblp
->current_protocol
= protocol
;
1141 dbg("usblp%d set protocol %d", usblp
->minor
, protocol
);
1145 /* Retrieves and caches device ID string.
1146 * Returns length, including length bytes but not null terminator.
1147 * On error, returns a negative errno value. */
1148 static int usblp_cache_device_id_string(struct usblp
*usblp
)
1152 err
= usblp_get_id(usblp
, 0, usblp
->device_id_string
, USBLP_DEVICE_ID_SIZE
- 1);
1154 dbg("usblp%d: error = %d reading IEEE-1284 Device ID string",
1156 usblp
->device_id_string
[0] = usblp
->device_id_string
[1] = '\0';
1160 /* First two bytes are length in big-endian.
1161 * They count themselves, and we copy them into
1162 * the user's buffer. */
1163 length
= be16_to_cpu(*((__be16
*)usblp
->device_id_string
));
1166 else if (length
>= USBLP_DEVICE_ID_SIZE
)
1167 length
= USBLP_DEVICE_ID_SIZE
- 1;
1168 usblp
->device_id_string
[length
] = '\0';
1170 dbg("usblp%d Device ID string [len=%d]=\"%s\"",
1171 usblp
->minor
, length
, &usblp
->device_id_string
[2]);
1176 static void usblp_disconnect(struct usb_interface
*intf
)
1178 struct usblp
*usblp
= usb_get_intfdata (intf
);
1180 usb_deregister_dev(intf
, &usblp_class
);
1182 if (!usblp
|| !usblp
->dev
) {
1183 err("bogus disconnect");
1187 device_remove_file(&intf
->dev
, &dev_attr_ieee1284_id
);
1189 mutex_lock (&usblp_mutex
);
1190 mutex_lock (&usblp
->mut
);
1192 usb_set_intfdata (intf
, NULL
);
1194 usblp_unlink_urbs(usblp
);
1195 usb_buffer_free (usblp
->dev
, USBLP_BUF_SIZE
,
1196 usblp
->writebuf
, usblp
->writeurb
->transfer_dma
);
1197 usb_buffer_free (usblp
->dev
, USBLP_BUF_SIZE
,
1198 usblp
->readbuf
, usblp
->readurb
->transfer_dma
);
1199 mutex_unlock (&usblp
->mut
);
1202 usblp_cleanup (usblp
);
1203 mutex_unlock (&usblp_mutex
);
1206 static int usblp_suspend (struct usb_interface
*intf
, pm_message_t message
)
1208 struct usblp
*usblp
= usb_get_intfdata (intf
);
1210 /* we take no more IO */
1211 usblp
->sleeping
= 1;
1212 usblp_unlink_urbs(usblp
);
1217 static int usblp_resume (struct usb_interface
*intf
)
1219 struct usblp
*usblp
= usb_get_intfdata (intf
);
1222 usblp
->sleeping
= 0;
1223 r
= handle_bidir (usblp
);
1228 static struct usb_device_id usblp_ids
[] = {
1229 { USB_DEVICE_INFO(7, 1, 1) },
1230 { USB_DEVICE_INFO(7, 1, 2) },
1231 { USB_DEVICE_INFO(7, 1, 3) },
1232 { USB_INTERFACE_INFO(7, 1, 1) },
1233 { USB_INTERFACE_INFO(7, 1, 2) },
1234 { USB_INTERFACE_INFO(7, 1, 3) },
1235 { } /* Terminating entry */
1238 MODULE_DEVICE_TABLE (usb
, usblp_ids
);
1240 static struct usb_driver usblp_driver
= {
1242 .probe
= usblp_probe
,
1243 .disconnect
= usblp_disconnect
,
1244 .suspend
= usblp_suspend
,
1245 .resume
= usblp_resume
,
1246 .id_table
= usblp_ids
,
1247 .supports_autosuspend
= 1,
1250 static int __init
usblp_init(void)
1253 retval
= usb_register(&usblp_driver
);
1255 info(DRIVER_VERSION
": " DRIVER_DESC
);
1260 static void __exit
usblp_exit(void)
1262 usb_deregister(&usblp_driver
);
1265 module_init(usblp_init
);
1266 module_exit(usblp_exit
);
1268 MODULE_AUTHOR( DRIVER_AUTHOR
);
1269 MODULE_DESCRIPTION( DRIVER_DESC
);
1270 module_param(proto_bias
, int, S_IRUGO
| S_IWUSR
);
1271 MODULE_PARM_DESC(proto_bias
, "Favourite protocol number");
1272 MODULE_LICENSE("GPL");