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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> | |
6 | * Copyright (c) 2000 Randy Dunlap <rddunlap@osdl.org> | |
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 | * | |
11 | * USB Printer Device Class driver for USB printers and printer cables | |
12 | * | |
13 | * Sponsored by SuSE | |
14 | * | |
15 | * ChangeLog: | |
16 | * v0.1 - thorough cleaning, URBification, almost a rewrite | |
17 | * v0.2 - some more cleanups | |
18 | * v0.3 - cleaner again, waitqueue fixes | |
19 | * v0.4 - fixes in unidirectional mode | |
20 | * v0.5 - add DEVICE_ID string support | |
21 | * v0.6 - never time out | |
22 | * v0.7 - fixed bulk-IN read and poll (David Paschal) | |
23 | * v0.8 - add devfs support | |
24 | * v0.9 - fix unplug-while-open paths | |
25 | * v0.10- remove sleep_on, fix error on oom (oliver@neukum.org) | |
26 | * v0.11 - add proto_bias option (Pete Zaitcev) | |
27 | * v0.12 - add hpoj.sourceforge.net ioctls (David Paschal) | |
28 | * v0.13 - alloc space for statusbuf (<status> not on stack); | |
29 | * use usb_buffer_alloc() for read buf & write buf; | |
30 | */ | |
31 | ||
32 | /* | |
33 | * This program is free software; you can redistribute it and/or modify | |
34 | * it under the terms of the GNU General Public License as published by | |
35 | * the Free Software Foundation; either version 2 of the License, or | |
36 | * (at your option) any later version. | |
37 | * | |
38 | * This program is distributed in the hope that it will be useful, | |
39 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
40 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
41 | * GNU General Public License for more details. | |
42 | * | |
43 | * You should have received a copy of the GNU General Public License | |
44 | * along with this program; if not, write to the Free Software | |
45 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
46 | */ | |
47 | ||
48 | #include <linux/module.h> | |
49 | #include <linux/kernel.h> | |
50 | #include <linux/sched.h> | |
51 | #include <linux/smp_lock.h> | |
52 | #include <linux/signal.h> | |
53 | #include <linux/poll.h> | |
54 | #include <linux/init.h> | |
55 | #include <linux/slab.h> | |
56 | #include <linux/lp.h> | |
57 | #undef DEBUG | |
58 | #include <linux/usb.h> | |
59 | ||
60 | /* | |
61 | * Version Information | |
62 | */ | |
63 | #define DRIVER_VERSION "v0.13" | |
64 | #define DRIVER_AUTHOR "Michael Gee, Pavel Machek, Vojtech Pavlik, Randy Dunlap, Pete Zaitcev, David Paschal" | |
65 | #define DRIVER_DESC "USB Printer Device Class driver" | |
66 | ||
67 | #define USBLP_BUF_SIZE 8192 | |
68 | #define USBLP_DEVICE_ID_SIZE 1024 | |
69 | ||
70 | /* ioctls: */ | |
71 | #define LPGETSTATUS 0x060b /* same as in drivers/char/lp.c */ | |
72 | #define IOCNR_GET_DEVICE_ID 1 | |
73 | #define IOCNR_GET_PROTOCOLS 2 | |
74 | #define IOCNR_SET_PROTOCOL 3 | |
75 | #define IOCNR_HP_SET_CHANNEL 4 | |
76 | #define IOCNR_GET_BUS_ADDRESS 5 | |
77 | #define IOCNR_GET_VID_PID 6 | |
78 | #define IOCNR_SOFT_RESET 7 | |
79 | /* Get device_id string: */ | |
80 | #define LPIOC_GET_DEVICE_ID(len) _IOC(_IOC_READ, 'P', IOCNR_GET_DEVICE_ID, len) | |
81 | /* The following ioctls were added for http://hpoj.sourceforge.net: */ | |
82 | /* Get two-int array: | |
83 | * [0]=current protocol (1=7/1/1, 2=7/1/2, 3=7/1/3), | |
84 | * [1]=supported protocol mask (mask&(1<<n)!=0 means 7/1/n supported): */ | |
85 | #define LPIOC_GET_PROTOCOLS(len) _IOC(_IOC_READ, 'P', IOCNR_GET_PROTOCOLS, len) | |
86 | /* Set protocol (arg: 1=7/1/1, 2=7/1/2, 3=7/1/3): */ | |
87 | #define LPIOC_SET_PROTOCOL _IOC(_IOC_WRITE, 'P', IOCNR_SET_PROTOCOL, 0) | |
88 | /* Set channel number (HP Vendor-specific command): */ | |
89 | #define LPIOC_HP_SET_CHANNEL _IOC(_IOC_WRITE, 'P', IOCNR_HP_SET_CHANNEL, 0) | |
90 | /* Get two-int array: [0]=bus number, [1]=device address: */ | |
91 | #define LPIOC_GET_BUS_ADDRESS(len) _IOC(_IOC_READ, 'P', IOCNR_GET_BUS_ADDRESS, len) | |
92 | /* Get two-int array: [0]=vendor ID, [1]=product ID: */ | |
93 | #define LPIOC_GET_VID_PID(len) _IOC(_IOC_READ, 'P', IOCNR_GET_VID_PID, len) | |
94 | /* Perform class specific soft reset */ | |
95 | #define LPIOC_SOFT_RESET _IOC(_IOC_NONE, 'P', IOCNR_SOFT_RESET, 0); | |
96 | ||
97 | /* | |
98 | * A DEVICE_ID string may include the printer's serial number. | |
99 | * It should end with a semi-colon (';'). | |
100 | * An example from an HP 970C DeskJet printer is (this is one long string, | |
101 | * with the serial number changed): | |
102 | 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: ; | |
103 | */ | |
104 | ||
105 | /* | |
106 | * USB Printer Requests | |
107 | */ | |
108 | ||
109 | #define USBLP_REQ_GET_ID 0x00 | |
110 | #define USBLP_REQ_GET_STATUS 0x01 | |
111 | #define USBLP_REQ_RESET 0x02 | |
112 | #define USBLP_REQ_HP_CHANNEL_CHANGE_REQUEST 0x00 /* HP Vendor-specific */ | |
113 | ||
114 | #define USBLP_MINORS 16 | |
115 | #define USBLP_MINOR_BASE 0 | |
116 | ||
117 | #define USBLP_WRITE_TIMEOUT (5000) /* 5 seconds */ | |
118 | ||
119 | #define USBLP_FIRST_PROTOCOL 1 | |
120 | #define USBLP_LAST_PROTOCOL 3 | |
121 | #define USBLP_MAX_PROTOCOLS (USBLP_LAST_PROTOCOL+1) | |
122 | ||
123 | /* | |
124 | * some arbitrary status buffer size; | |
125 | * need a status buffer that is allocated via kmalloc(), not on stack | |
126 | */ | |
127 | #define STATUS_BUF_SIZE 8 | |
128 | ||
129 | struct usblp { | |
130 | struct usb_device *dev; /* USB device */ | |
131 | struct semaphore sem; /* locks this struct, especially "dev" */ | |
132 | char *writebuf; /* write transfer_buffer */ | |
133 | char *readbuf; /* read transfer_buffer */ | |
134 | char *statusbuf; /* status transfer_buffer */ | |
135 | struct urb *readurb, *writeurb; /* The urbs */ | |
136 | wait_queue_head_t wait; /* Zzzzz ... */ | |
137 | int readcount; /* Counter for reads */ | |
138 | int ifnum; /* Interface number */ | |
139 | struct usb_interface *intf; /* The interface */ | |
140 | /* Alternate-setting numbers and endpoints for each protocol | |
141 | * (7/1/{index=1,2,3}) that the device supports: */ | |
142 | struct { | |
143 | int alt_setting; | |
144 | struct usb_endpoint_descriptor *epwrite; | |
145 | struct usb_endpoint_descriptor *epread; | |
146 | } protocol[USBLP_MAX_PROTOCOLS]; | |
147 | int current_protocol; | |
148 | int minor; /* minor number of device */ | |
149 | int wcomplete; /* writing is completed */ | |
150 | int rcomplete; /* reading is completed */ | |
151 | unsigned int quirks; /* quirks flags */ | |
152 | unsigned char used; /* True if open */ | |
153 | unsigned char present; /* True if not disconnected */ | |
154 | unsigned char bidir; /* interface is bidirectional */ | |
155 | unsigned char *device_id_string; /* IEEE 1284 DEVICE ID string (ptr) */ | |
156 | /* first 2 bytes are (big-endian) length */ | |
157 | }; | |
158 | ||
159 | #ifdef DEBUG | |
160 | static void usblp_dump(struct usblp *usblp) { | |
161 | int p; | |
162 | ||
163 | dbg("usblp=0x%p", usblp); | |
164 | dbg("dev=0x%p", usblp->dev); | |
165 | dbg("present=%d", usblp->present); | |
166 | dbg("readbuf=0x%p", usblp->readbuf); | |
167 | dbg("writebuf=0x%p", usblp->writebuf); | |
168 | dbg("readurb=0x%p", usblp->readurb); | |
169 | dbg("writeurb=0x%p", usblp->writeurb); | |
170 | dbg("readcount=%d", usblp->readcount); | |
171 | dbg("ifnum=%d", usblp->ifnum); | |
172 | for (p = USBLP_FIRST_PROTOCOL; p <= USBLP_LAST_PROTOCOL; p++) { | |
173 | dbg("protocol[%d].alt_setting=%d", p, usblp->protocol[p].alt_setting); | |
174 | dbg("protocol[%d].epwrite=%p", p, usblp->protocol[p].epwrite); | |
175 | dbg("protocol[%d].epread=%p", p, usblp->protocol[p].epread); | |
176 | } | |
177 | dbg("current_protocol=%d", usblp->current_protocol); | |
178 | dbg("minor=%d", usblp->minor); | |
179 | dbg("wcomplete=%d", usblp->wcomplete); | |
180 | dbg("rcomplete=%d", usblp->rcomplete); | |
181 | dbg("quirks=%d", usblp->quirks); | |
182 | dbg("used=%d", usblp->used); | |
183 | dbg("bidir=%d", usblp->bidir); | |
184 | dbg("device_id_string=\"%s\"", | |
185 | usblp->device_id_string ? | |
186 | usblp->device_id_string + 2 : | |
187 | (unsigned char *)"(null)"); | |
188 | } | |
189 | #endif | |
190 | ||
191 | /* Quirks: various printer quirks are handled by this table & its flags. */ | |
192 | ||
193 | struct quirk_printer_struct { | |
194 | __u16 vendorId; | |
195 | __u16 productId; | |
196 | unsigned int quirks; | |
197 | }; | |
198 | ||
199 | #define USBLP_QUIRK_BIDIR 0x1 /* reports bidir but requires unidirectional mode (no INs/reads) */ | |
200 | #define USBLP_QUIRK_USB_INIT 0x2 /* needs vendor USB init string */ | |
201 | ||
202 | static struct quirk_printer_struct quirk_printers[] = { | |
203 | { 0x03f0, 0x0004, USBLP_QUIRK_BIDIR }, /* HP DeskJet 895C */ | |
204 | { 0x03f0, 0x0104, USBLP_QUIRK_BIDIR }, /* HP DeskJet 880C */ | |
205 | { 0x03f0, 0x0204, USBLP_QUIRK_BIDIR }, /* HP DeskJet 815C */ | |
206 | { 0x03f0, 0x0304, USBLP_QUIRK_BIDIR }, /* HP DeskJet 810C/812C */ | |
207 | { 0x03f0, 0x0404, USBLP_QUIRK_BIDIR }, /* HP DeskJet 830C */ | |
208 | { 0x03f0, 0x0504, USBLP_QUIRK_BIDIR }, /* HP DeskJet 885C */ | |
209 | { 0x03f0, 0x0604, USBLP_QUIRK_BIDIR }, /* HP DeskJet 840C */ | |
210 | { 0x03f0, 0x0804, USBLP_QUIRK_BIDIR }, /* HP DeskJet 816C */ | |
211 | { 0x03f0, 0x1104, USBLP_QUIRK_BIDIR }, /* HP Deskjet 959C */ | |
212 | { 0x0409, 0xefbe, USBLP_QUIRK_BIDIR }, /* NEC Picty900 (HP OEM) */ | |
213 | { 0x0409, 0xbef4, USBLP_QUIRK_BIDIR }, /* NEC Picty760 (HP OEM) */ | |
214 | { 0x0409, 0xf0be, USBLP_QUIRK_BIDIR }, /* NEC Picty920 (HP OEM) */ | |
215 | { 0x0409, 0xf1be, USBLP_QUIRK_BIDIR }, /* NEC Picty800 (HP OEM) */ | |
216 | { 0, 0 } | |
217 | }; | |
218 | ||
219 | static int usblp_select_alts(struct usblp *usblp); | |
220 | static int usblp_set_protocol(struct usblp *usblp, int protocol); | |
221 | static int usblp_cache_device_id_string(struct usblp *usblp); | |
222 | ||
223 | /* forward reference to make our lives easier */ | |
224 | static struct usb_driver usblp_driver; | |
225 | static DECLARE_MUTEX(usblp_sem); /* locks the existence of usblp's */ | |
226 | ||
227 | /* | |
228 | * Functions for usblp control messages. | |
229 | */ | |
230 | ||
231 | static int usblp_ctrl_msg(struct usblp *usblp, int request, int type, int dir, int recip, int value, void *buf, int len) | |
232 | { | |
233 | int retval; | |
234 | int index = usblp->ifnum; | |
235 | ||
236 | /* High byte has the interface index. | |
237 | Low byte has the alternate setting. | |
238 | */ | |
239 | if ((request == USBLP_REQ_GET_ID) && (type == USB_TYPE_CLASS)) { | |
240 | index = (usblp->ifnum<<8)|usblp->protocol[usblp->current_protocol].alt_setting; | |
241 | } | |
242 | ||
243 | retval = usb_control_msg(usblp->dev, | |
244 | dir ? usb_rcvctrlpipe(usblp->dev, 0) : usb_sndctrlpipe(usblp->dev, 0), | |
245 | request, type | dir | recip, value, index, buf, len, USBLP_WRITE_TIMEOUT); | |
246 | dbg("usblp_control_msg: rq: 0x%02x dir: %d recip: %d value: %d idx: %d len: %#x result: %d", | |
247 | request, !!dir, recip, value, index, len, retval); | |
248 | return retval < 0 ? retval : 0; | |
249 | } | |
250 | ||
251 | #define usblp_read_status(usblp, status)\ | |
252 | usblp_ctrl_msg(usblp, USBLP_REQ_GET_STATUS, USB_TYPE_CLASS, USB_DIR_IN, USB_RECIP_INTERFACE, 0, status, 1) | |
253 | #define usblp_get_id(usblp, config, id, maxlen)\ | |
254 | usblp_ctrl_msg(usblp, USBLP_REQ_GET_ID, USB_TYPE_CLASS, USB_DIR_IN, USB_RECIP_INTERFACE, config, id, maxlen) | |
255 | #define usblp_reset(usblp)\ | |
256 | usblp_ctrl_msg(usblp, USBLP_REQ_RESET, USB_TYPE_CLASS, USB_DIR_OUT, USB_RECIP_OTHER, 0, NULL, 0) | |
257 | ||
258 | #define usblp_hp_channel_change_request(usblp, channel, buffer) \ | |
259 | usblp_ctrl_msg(usblp, USBLP_REQ_HP_CHANNEL_CHANGE_REQUEST, USB_TYPE_VENDOR, USB_DIR_IN, USB_RECIP_INTERFACE, channel, buffer, 1) | |
260 | ||
261 | /* | |
262 | * See the description for usblp_select_alts() below for the usage | |
263 | * explanation. Look into your /proc/bus/usb/devices and dmesg in | |
264 | * case of any trouble. | |
265 | */ | |
266 | static int proto_bias = -1; | |
267 | ||
268 | /* | |
269 | * URB callback. | |
270 | */ | |
271 | ||
272 | static void usblp_bulk_read(struct urb *urb, struct pt_regs *regs) | |
273 | { | |
274 | struct usblp *usblp = urb->context; | |
275 | ||
276 | if (!usblp || !usblp->dev || !usblp->used || !usblp->present) | |
277 | return; | |
278 | ||
279 | if (unlikely(urb->status)) | |
280 | warn("usblp%d: nonzero read/write bulk status received: %d", | |
281 | usblp->minor, urb->status); | |
282 | usblp->rcomplete = 1; | |
283 | wake_up_interruptible(&usblp->wait); | |
284 | } | |
285 | ||
286 | static void usblp_bulk_write(struct urb *urb, struct pt_regs *regs) | |
287 | { | |
288 | struct usblp *usblp = urb->context; | |
289 | ||
290 | if (!usblp || !usblp->dev || !usblp->used || !usblp->present) | |
291 | return; | |
292 | ||
293 | if (unlikely(urb->status)) | |
294 | warn("usblp%d: nonzero read/write bulk status received: %d", | |
295 | usblp->minor, urb->status); | |
296 | usblp->wcomplete = 1; | |
297 | wake_up_interruptible(&usblp->wait); | |
298 | } | |
299 | ||
300 | /* | |
301 | * Get and print printer errors. | |
302 | */ | |
303 | ||
304 | static char *usblp_messages[] = { "ok", "out of paper", "off-line", "on fire" }; | |
305 | ||
306 | static int usblp_check_status(struct usblp *usblp, int err) | |
307 | { | |
308 | unsigned char status, newerr = 0; | |
309 | int error; | |
310 | ||
311 | error = usblp_read_status (usblp, usblp->statusbuf); | |
312 | if (error < 0) { | |
0bc8e009 RD |
313 | if (printk_ratelimit()) |
314 | err("usblp%d: error %d reading printer status", | |
315 | usblp->minor, error); | |
1da177e4 LT |
316 | return 0; |
317 | } | |
318 | ||
319 | status = *usblp->statusbuf; | |
320 | ||
321 | if (~status & LP_PERRORP) | |
322 | newerr = 3; | |
323 | if (status & LP_POUTPA) | |
324 | newerr = 1; | |
325 | if (~status & LP_PSELECD) | |
326 | newerr = 2; | |
327 | ||
328 | if (newerr != err) | |
329 | info("usblp%d: %s", usblp->minor, usblp_messages[newerr]); | |
330 | ||
331 | return newerr; | |
332 | } | |
333 | ||
334 | /* | |
335 | * File op functions. | |
336 | */ | |
337 | ||
338 | static int usblp_open(struct inode *inode, struct file *file) | |
339 | { | |
340 | int minor = iminor(inode); | |
341 | struct usblp *usblp; | |
342 | struct usb_interface *intf; | |
343 | int retval; | |
344 | ||
345 | if (minor < 0) | |
346 | return -ENODEV; | |
347 | ||
348 | down (&usblp_sem); | |
349 | ||
350 | retval = -ENODEV; | |
351 | intf = usb_find_interface(&usblp_driver, minor); | |
352 | if (!intf) { | |
353 | goto out; | |
354 | } | |
355 | usblp = usb_get_intfdata (intf); | |
356 | if (!usblp || !usblp->dev || !usblp->present) | |
357 | goto out; | |
358 | ||
359 | retval = -EBUSY; | |
360 | if (usblp->used) | |
361 | goto out; | |
362 | ||
363 | /* | |
364 | * TODO: need to implement LP_ABORTOPEN + O_NONBLOCK as in drivers/char/lp.c ??? | |
365 | * This is #if 0-ed because we *don't* want to fail an open | |
366 | * just because the printer is off-line. | |
367 | */ | |
368 | #if 0 | |
369 | if ((retval = usblp_check_status(usblp, 0))) { | |
370 | retval = retval > 1 ? -EIO : -ENOSPC; | |
371 | goto out; | |
372 | } | |
373 | #else | |
374 | retval = 0; | |
375 | #endif | |
376 | ||
377 | usblp->used = 1; | |
378 | file->private_data = usblp; | |
379 | ||
380 | usblp->writeurb->transfer_buffer_length = 0; | |
381 | usblp->wcomplete = 1; /* we begin writeable */ | |
382 | usblp->rcomplete = 0; | |
2c45b6fe AO |
383 | usblp->writeurb->status = 0; |
384 | usblp->readurb->status = 0; | |
1da177e4 LT |
385 | |
386 | if (usblp->bidir) { | |
387 | usblp->readcount = 0; | |
388 | usblp->readurb->dev = usblp->dev; | |
389 | if (usb_submit_urb(usblp->readurb, GFP_KERNEL) < 0) { | |
390 | retval = -EIO; | |
391 | usblp->used = 0; | |
392 | file->private_data = NULL; | |
393 | } | |
394 | } | |
395 | out: | |
396 | up (&usblp_sem); | |
397 | return retval; | |
398 | } | |
399 | ||
400 | static void usblp_cleanup (struct usblp *usblp) | |
401 | { | |
402 | info("usblp%d: removed", usblp->minor); | |
403 | ||
404 | kfree (usblp->device_id_string); | |
405 | kfree (usblp->statusbuf); | |
406 | usb_free_urb(usblp->writeurb); | |
407 | usb_free_urb(usblp->readurb); | |
408 | kfree (usblp); | |
409 | } | |
410 | ||
411 | static void usblp_unlink_urbs(struct usblp *usblp) | |
412 | { | |
413 | usb_kill_urb(usblp->writeurb); | |
414 | if (usblp->bidir) | |
415 | usb_kill_urb(usblp->readurb); | |
416 | } | |
417 | ||
418 | static int usblp_release(struct inode *inode, struct file *file) | |
419 | { | |
420 | struct usblp *usblp = file->private_data; | |
421 | ||
422 | down (&usblp_sem); | |
423 | usblp->used = 0; | |
424 | if (usblp->present) { | |
425 | usblp_unlink_urbs(usblp); | |
426 | } else /* finish cleanup from disconnect */ | |
427 | usblp_cleanup (usblp); | |
428 | up (&usblp_sem); | |
429 | return 0; | |
430 | } | |
431 | ||
432 | /* No kernel lock - fine */ | |
433 | static unsigned int usblp_poll(struct file *file, struct poll_table_struct *wait) | |
434 | { | |
435 | struct usblp *usblp = file->private_data; | |
436 | poll_wait(file, &usblp->wait, wait); | |
437 | return ((!usblp->bidir || !usblp->rcomplete) ? 0 : POLLIN | POLLRDNORM) | |
438 | | (!usblp->wcomplete ? 0 : POLLOUT | POLLWRNORM); | |
439 | } | |
440 | ||
441 | static int usblp_ioctl(struct inode *inode, struct file *file, unsigned int cmd, unsigned long arg) | |
442 | { | |
443 | struct usblp *usblp = file->private_data; | |
444 | int length, err, i; | |
445 | unsigned char newChannel; | |
446 | int status; | |
447 | int twoints[2]; | |
448 | int retval = 0; | |
449 | ||
450 | down (&usblp->sem); | |
451 | if (!usblp->present) { | |
452 | retval = -ENODEV; | |
453 | goto done; | |
454 | } | |
455 | ||
456 | dbg("usblp_ioctl: cmd=0x%x (%c nr=%d len=%d dir=%d)", cmd, _IOC_TYPE(cmd), | |
457 | _IOC_NR(cmd), _IOC_SIZE(cmd), _IOC_DIR(cmd) ); | |
458 | ||
459 | if (_IOC_TYPE(cmd) == 'P') /* new-style ioctl number */ | |
460 | ||
461 | switch (_IOC_NR(cmd)) { | |
462 | ||
463 | case IOCNR_GET_DEVICE_ID: /* get the DEVICE_ID string */ | |
464 | if (_IOC_DIR(cmd) != _IOC_READ) { | |
465 | retval = -EINVAL; | |
466 | goto done; | |
467 | } | |
468 | ||
469 | length = usblp_cache_device_id_string(usblp); | |
470 | if (length < 0) { | |
471 | retval = length; | |
472 | goto done; | |
473 | } | |
474 | if (length > _IOC_SIZE(cmd)) | |
475 | length = _IOC_SIZE(cmd); /* truncate */ | |
476 | ||
477 | if (copy_to_user((void __user *) arg, | |
478 | usblp->device_id_string, | |
479 | (unsigned long) length)) { | |
480 | retval = -EFAULT; | |
481 | goto done; | |
482 | } | |
483 | ||
484 | break; | |
485 | ||
486 | case IOCNR_GET_PROTOCOLS: | |
487 | if (_IOC_DIR(cmd) != _IOC_READ || | |
488 | _IOC_SIZE(cmd) < sizeof(twoints)) { | |
489 | retval = -EINVAL; | |
490 | goto done; | |
491 | } | |
492 | ||
493 | twoints[0] = usblp->current_protocol; | |
494 | twoints[1] = 0; | |
495 | for (i = USBLP_FIRST_PROTOCOL; | |
496 | i <= USBLP_LAST_PROTOCOL; i++) { | |
497 | if (usblp->protocol[i].alt_setting >= 0) | |
498 | twoints[1] |= (1<<i); | |
499 | } | |
500 | ||
501 | if (copy_to_user((void __user *)arg, | |
502 | (unsigned char *)twoints, | |
503 | sizeof(twoints))) { | |
504 | retval = -EFAULT; | |
505 | goto done; | |
506 | } | |
507 | ||
508 | break; | |
509 | ||
510 | case IOCNR_SET_PROTOCOL: | |
511 | if (_IOC_DIR(cmd) != _IOC_WRITE) { | |
512 | retval = -EINVAL; | |
513 | goto done; | |
514 | } | |
515 | ||
516 | #ifdef DEBUG | |
517 | if (arg == -10) { | |
518 | usblp_dump(usblp); | |
519 | break; | |
520 | } | |
521 | #endif | |
522 | ||
523 | usblp_unlink_urbs(usblp); | |
524 | retval = usblp_set_protocol(usblp, arg); | |
525 | if (retval < 0) { | |
526 | usblp_set_protocol(usblp, | |
527 | usblp->current_protocol); | |
528 | } | |
529 | break; | |
530 | ||
531 | case IOCNR_HP_SET_CHANNEL: | |
532 | if (_IOC_DIR(cmd) != _IOC_WRITE || | |
533 | le16_to_cpu(usblp->dev->descriptor.idVendor) != 0x03F0 || | |
534 | usblp->quirks & USBLP_QUIRK_BIDIR) { | |
535 | retval = -EINVAL; | |
536 | goto done; | |
537 | } | |
538 | ||
539 | err = usblp_hp_channel_change_request(usblp, | |
540 | arg, &newChannel); | |
541 | if (err < 0) { | |
542 | err("usblp%d: error = %d setting " | |
543 | "HP channel", | |
544 | usblp->minor, err); | |
545 | retval = -EIO; | |
546 | goto done; | |
547 | } | |
548 | ||
549 | dbg("usblp%d requested/got HP channel %ld/%d", | |
550 | usblp->minor, arg, newChannel); | |
551 | break; | |
552 | ||
553 | case IOCNR_GET_BUS_ADDRESS: | |
554 | if (_IOC_DIR(cmd) != _IOC_READ || | |
555 | _IOC_SIZE(cmd) < sizeof(twoints)) { | |
556 | retval = -EINVAL; | |
557 | goto done; | |
558 | } | |
559 | ||
560 | twoints[0] = usblp->dev->bus->busnum; | |
561 | twoints[1] = usblp->dev->devnum; | |
562 | if (copy_to_user((void __user *)arg, | |
563 | (unsigned char *)twoints, | |
564 | sizeof(twoints))) { | |
565 | retval = -EFAULT; | |
566 | goto done; | |
567 | } | |
568 | ||
569 | dbg("usblp%d is bus=%d, device=%d", | |
570 | usblp->minor, twoints[0], twoints[1]); | |
571 | break; | |
572 | ||
573 | case IOCNR_GET_VID_PID: | |
574 | if (_IOC_DIR(cmd) != _IOC_READ || | |
575 | _IOC_SIZE(cmd) < sizeof(twoints)) { | |
576 | retval = -EINVAL; | |
577 | goto done; | |
578 | } | |
579 | ||
580 | twoints[0] = le16_to_cpu(usblp->dev->descriptor.idVendor); | |
581 | twoints[1] = le16_to_cpu(usblp->dev->descriptor.idProduct); | |
582 | if (copy_to_user((void __user *)arg, | |
583 | (unsigned char *)twoints, | |
584 | sizeof(twoints))) { | |
585 | retval = -EFAULT; | |
586 | goto done; | |
587 | } | |
588 | ||
589 | dbg("usblp%d is VID=0x%4.4X, PID=0x%4.4X", | |
590 | usblp->minor, twoints[0], twoints[1]); | |
591 | break; | |
592 | ||
593 | case IOCNR_SOFT_RESET: | |
594 | if (_IOC_DIR(cmd) != _IOC_NONE) { | |
595 | retval = -EINVAL; | |
596 | goto done; | |
597 | } | |
598 | retval = usblp_reset(usblp); | |
599 | break; | |
600 | default: | |
601 | retval = -ENOTTY; | |
602 | } | |
603 | else /* old-style ioctl value */ | |
604 | switch (cmd) { | |
605 | ||
606 | case LPGETSTATUS: | |
607 | if (usblp_read_status(usblp, usblp->statusbuf)) { | |
0bc8e009 RD |
608 | if (printk_ratelimit()) |
609 | err("usblp%d: failed reading printer status", | |
610 | usblp->minor); | |
1da177e4 LT |
611 | retval = -EIO; |
612 | goto done; | |
613 | } | |
614 | status = *usblp->statusbuf; | |
615 | if (copy_to_user ((void __user *)arg, &status, sizeof(int))) | |
616 | retval = -EFAULT; | |
617 | break; | |
618 | ||
619 | default: | |
620 | retval = -ENOTTY; | |
621 | } | |
622 | ||
623 | done: | |
624 | up (&usblp->sem); | |
625 | return retval; | |
626 | } | |
627 | ||
628 | static ssize_t usblp_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos) | |
629 | { | |
630 | DECLARE_WAITQUEUE(wait, current); | |
631 | struct usblp *usblp = file->private_data; | |
632 | int timeout, err = 0, transfer_length = 0; | |
633 | size_t writecount = 0; | |
634 | ||
635 | while (writecount < count) { | |
636 | if (!usblp->wcomplete) { | |
637 | barrier(); | |
638 | if (file->f_flags & O_NONBLOCK) { | |
639 | writecount += transfer_length; | |
640 | return writecount ? writecount : -EAGAIN; | |
641 | } | |
642 | ||
643 | timeout = USBLP_WRITE_TIMEOUT; | |
644 | add_wait_queue(&usblp->wait, &wait); | |
645 | while ( 1==1 ) { | |
646 | ||
647 | if (signal_pending(current)) { | |
648 | remove_wait_queue(&usblp->wait, &wait); | |
649 | return writecount ? writecount : -EINTR; | |
650 | } | |
651 | set_current_state(TASK_INTERRUPTIBLE); | |
652 | if (timeout && !usblp->wcomplete) { | |
653 | timeout = schedule_timeout(timeout); | |
654 | } else { | |
655 | set_current_state(TASK_RUNNING); | |
656 | break; | |
657 | } | |
658 | } | |
659 | remove_wait_queue(&usblp->wait, &wait); | |
660 | } | |
661 | ||
662 | down (&usblp->sem); | |
663 | if (!usblp->present) { | |
664 | up (&usblp->sem); | |
665 | return -ENODEV; | |
666 | } | |
667 | ||
668 | if (usblp->writeurb->status != 0) { | |
669 | if (usblp->quirks & USBLP_QUIRK_BIDIR) { | |
670 | if (!usblp->wcomplete) | |
671 | err("usblp%d: error %d writing to printer", | |
672 | usblp->minor, usblp->writeurb->status); | |
673 | err = usblp->writeurb->status; | |
674 | } else | |
675 | err = usblp_check_status(usblp, err); | |
676 | up (&usblp->sem); | |
677 | ||
678 | /* if the fault was due to disconnect, let khubd's | |
679 | * call to usblp_disconnect() grab usblp->sem ... | |
680 | */ | |
681 | schedule (); | |
682 | continue; | |
683 | } | |
684 | ||
685 | /* We must increment writecount here, and not at the | |
686 | * end of the loop. Otherwise, the final loop iteration may | |
687 | * be skipped, leading to incomplete printer output. | |
688 | */ | |
689 | writecount += transfer_length; | |
690 | if (writecount == count) { | |
691 | up(&usblp->sem); | |
692 | break; | |
693 | } | |
694 | ||
695 | transfer_length=(count - writecount); | |
696 | if (transfer_length > USBLP_BUF_SIZE) | |
697 | transfer_length = USBLP_BUF_SIZE; | |
698 | ||
699 | usblp->writeurb->transfer_buffer_length = transfer_length; | |
700 | ||
701 | if (copy_from_user(usblp->writeurb->transfer_buffer, | |
702 | buffer + writecount, transfer_length)) { | |
703 | up(&usblp->sem); | |
704 | return writecount ? writecount : -EFAULT; | |
705 | } | |
706 | ||
707 | usblp->writeurb->dev = usblp->dev; | |
708 | usblp->wcomplete = 0; | |
709 | err = usb_submit_urb(usblp->writeurb, GFP_KERNEL); | |
710 | if (err) { | |
711 | if (err != -ENOMEM) | |
712 | count = -EIO; | |
713 | else | |
714 | count = writecount ? writecount : -ENOMEM; | |
715 | up (&usblp->sem); | |
716 | break; | |
717 | } | |
718 | up (&usblp->sem); | |
719 | } | |
720 | ||
721 | return count; | |
722 | } | |
723 | ||
724 | static ssize_t usblp_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos) | |
725 | { | |
726 | struct usblp *usblp = file->private_data; | |
727 | DECLARE_WAITQUEUE(wait, current); | |
728 | ||
729 | if (!usblp->bidir) | |
730 | return -EINVAL; | |
731 | ||
732 | down (&usblp->sem); | |
733 | if (!usblp->present) { | |
734 | count = -ENODEV; | |
735 | goto done; | |
736 | } | |
737 | ||
738 | if (!usblp->rcomplete) { | |
739 | barrier(); | |
740 | ||
741 | if (file->f_flags & O_NONBLOCK) { | |
742 | count = -EAGAIN; | |
743 | goto done; | |
744 | } | |
745 | ||
746 | add_wait_queue(&usblp->wait, &wait); | |
747 | while (1==1) { | |
748 | if (signal_pending(current)) { | |
749 | count = -EINTR; | |
750 | remove_wait_queue(&usblp->wait, &wait); | |
751 | goto done; | |
752 | } | |
753 | up (&usblp->sem); | |
754 | set_current_state(TASK_INTERRUPTIBLE); | |
755 | if (!usblp->rcomplete) { | |
756 | schedule(); | |
757 | } else { | |
758 | set_current_state(TASK_RUNNING); | |
01205a0e | 759 | down(&usblp->sem); |
1da177e4 LT |
760 | break; |
761 | } | |
762 | down (&usblp->sem); | |
763 | } | |
764 | remove_wait_queue(&usblp->wait, &wait); | |
765 | } | |
766 | ||
767 | if (!usblp->present) { | |
768 | count = -ENODEV; | |
769 | goto done; | |
770 | } | |
771 | ||
772 | if (usblp->readurb->status) { | |
773 | err("usblp%d: error %d reading from printer", | |
774 | usblp->minor, usblp->readurb->status); | |
775 | usblp->readurb->dev = usblp->dev; | |
776 | usblp->readcount = 0; | |
777 | usblp->rcomplete = 0; | |
778 | if (usb_submit_urb(usblp->readurb, GFP_KERNEL) < 0) | |
779 | dbg("error submitting urb"); | |
780 | count = -EIO; | |
781 | goto done; | |
782 | } | |
783 | ||
784 | count = count < usblp->readurb->actual_length - usblp->readcount ? | |
785 | count : usblp->readurb->actual_length - usblp->readcount; | |
786 | ||
787 | if (copy_to_user(buffer, usblp->readurb->transfer_buffer + usblp->readcount, count)) { | |
788 | count = -EFAULT; | |
789 | goto done; | |
790 | } | |
791 | ||
792 | if ((usblp->readcount += count) == usblp->readurb->actual_length) { | |
793 | usblp->readcount = 0; | |
794 | usblp->readurb->dev = usblp->dev; | |
795 | usblp->rcomplete = 0; | |
796 | if (usb_submit_urb(usblp->readurb, GFP_KERNEL)) { | |
797 | count = -EIO; | |
798 | goto done; | |
799 | } | |
800 | } | |
801 | ||
802 | done: | |
803 | up (&usblp->sem); | |
804 | return count; | |
805 | } | |
806 | ||
807 | /* | |
808 | * Checks for printers that have quirks, such as requiring unidirectional | |
809 | * communication but reporting bidirectional; currently some HP printers | |
810 | * have this flaw (HP 810, 880, 895, etc.), or needing an init string | |
811 | * sent at each open (like some Epsons). | |
812 | * Returns 1 if found, 0 if not found. | |
813 | * | |
814 | * HP recommended that we use the bidirectional interface but | |
815 | * don't attempt any bulk IN transfers from the IN endpoint. | |
816 | * Here's some more detail on the problem: | |
817 | * The problem is not that it isn't bidirectional though. The problem | |
818 | * is that if you request a device ID, or status information, while | |
819 | * the buffers are full, the return data will end up in the print data | |
820 | * buffer. For example if you make sure you never request the device ID | |
821 | * while you are sending print data, and you don't try to query the | |
822 | * printer status every couple of milliseconds, you will probably be OK. | |
823 | */ | |
824 | static unsigned int usblp_quirks (__u16 vendor, __u16 product) | |
825 | { | |
826 | int i; | |
827 | ||
828 | for (i = 0; quirk_printers[i].vendorId; i++) { | |
829 | if (vendor == quirk_printers[i].vendorId && | |
830 | product == quirk_printers[i].productId) | |
831 | return quirk_printers[i].quirks; | |
832 | } | |
833 | return 0; | |
834 | } | |
835 | ||
836 | static struct file_operations usblp_fops = { | |
837 | .owner = THIS_MODULE, | |
838 | .read = usblp_read, | |
839 | .write = usblp_write, | |
840 | .poll = usblp_poll, | |
841 | .ioctl = usblp_ioctl, | |
842 | .open = usblp_open, | |
843 | .release = usblp_release, | |
844 | }; | |
845 | ||
846 | static struct usb_class_driver usblp_class = { | |
847 | .name = "usb/lp%d", | |
848 | .fops = &usblp_fops, | |
849 | .mode = S_IFCHR | S_IRUSR | S_IWUSR | S_IRGRP | S_IWGRP, | |
850 | .minor_base = USBLP_MINOR_BASE, | |
851 | }; | |
852 | ||
853 | static int usblp_probe(struct usb_interface *intf, | |
854 | const struct usb_device_id *id) | |
855 | { | |
856 | struct usb_device *dev = interface_to_usbdev (intf); | |
857 | struct usblp *usblp = NULL; | |
858 | int protocol; | |
859 | int retval; | |
860 | ||
861 | /* Malloc and start initializing usblp structure so we can use it | |
862 | * directly. */ | |
863 | if (!(usblp = kmalloc(sizeof(struct usblp), GFP_KERNEL))) { | |
864 | err("out of memory for usblp"); | |
865 | goto abort; | |
866 | } | |
867 | memset(usblp, 0, sizeof(struct usblp)); | |
868 | usblp->dev = dev; | |
869 | init_MUTEX (&usblp->sem); | |
870 | init_waitqueue_head(&usblp->wait); | |
871 | usblp->ifnum = intf->cur_altsetting->desc.bInterfaceNumber; | |
872 | usblp->intf = intf; | |
873 | ||
874 | usblp->writeurb = usb_alloc_urb(0, GFP_KERNEL); | |
875 | if (!usblp->writeurb) { | |
876 | err("out of memory"); | |
877 | goto abort; | |
878 | } | |
879 | usblp->readurb = usb_alloc_urb(0, GFP_KERNEL); | |
880 | if (!usblp->readurb) { | |
881 | err("out of memory"); | |
882 | goto abort; | |
883 | } | |
884 | ||
885 | /* Malloc device ID string buffer to the largest expected length, | |
886 | * since we can re-query it on an ioctl and a dynamic string | |
887 | * could change in length. */ | |
888 | if (!(usblp->device_id_string = kmalloc(USBLP_DEVICE_ID_SIZE, GFP_KERNEL))) { | |
889 | err("out of memory for device_id_string"); | |
890 | goto abort; | |
891 | } | |
892 | ||
893 | usblp->writebuf = usblp->readbuf = NULL; | |
894 | usblp->writeurb->transfer_flags = URB_NO_TRANSFER_DMA_MAP; | |
895 | usblp->readurb->transfer_flags = URB_NO_TRANSFER_DMA_MAP; | |
896 | /* Malloc write & read buffers. We somewhat wastefully | |
897 | * malloc both regardless of bidirectionality, because the | |
898 | * alternate setting can be changed later via an ioctl. */ | |
899 | if (!(usblp->writebuf = usb_buffer_alloc(dev, USBLP_BUF_SIZE, | |
900 | GFP_KERNEL, &usblp->writeurb->transfer_dma))) { | |
901 | err("out of memory for write buf"); | |
902 | goto abort; | |
903 | } | |
904 | if (!(usblp->readbuf = usb_buffer_alloc(dev, USBLP_BUF_SIZE, | |
905 | GFP_KERNEL, &usblp->readurb->transfer_dma))) { | |
906 | err("out of memory for read buf"); | |
907 | goto abort; | |
908 | } | |
909 | ||
910 | /* Allocate buffer for printer status */ | |
911 | usblp->statusbuf = kmalloc(STATUS_BUF_SIZE, GFP_KERNEL); | |
912 | if (!usblp->statusbuf) { | |
913 | err("out of memory for statusbuf"); | |
914 | goto abort; | |
915 | } | |
916 | ||
917 | /* Lookup quirks for this printer. */ | |
918 | usblp->quirks = usblp_quirks( | |
919 | le16_to_cpu(dev->descriptor.idVendor), | |
920 | le16_to_cpu(dev->descriptor.idProduct)); | |
921 | ||
922 | /* Analyze and pick initial alternate settings and endpoints. */ | |
923 | protocol = usblp_select_alts(usblp); | |
924 | if (protocol < 0) { | |
925 | dbg("incompatible printer-class device 0x%4.4X/0x%4.4X", | |
926 | le16_to_cpu(dev->descriptor.idVendor), | |
927 | le16_to_cpu(dev->descriptor.idProduct)); | |
928 | goto abort; | |
929 | } | |
930 | ||
931 | /* Setup the selected alternate setting and endpoints. */ | |
932 | if (usblp_set_protocol(usblp, protocol) < 0) | |
933 | goto abort; | |
934 | ||
935 | /* Retrieve and store the device ID string. */ | |
936 | usblp_cache_device_id_string(usblp); | |
937 | ||
938 | #ifdef DEBUG | |
939 | usblp_check_status(usblp, 0); | |
940 | #endif | |
941 | ||
942 | info("usblp%d: USB %sdirectional printer dev %d " | |
943 | "if %d alt %d proto %d vid 0x%4.4X pid 0x%4.4X", | |
944 | usblp->minor, usblp->bidir ? "Bi" : "Uni", dev->devnum, | |
945 | usblp->ifnum, | |
946 | usblp->protocol[usblp->current_protocol].alt_setting, | |
947 | usblp->current_protocol, | |
948 | le16_to_cpu(usblp->dev->descriptor.idVendor), | |
949 | le16_to_cpu(usblp->dev->descriptor.idProduct)); | |
950 | ||
951 | usb_set_intfdata (intf, usblp); | |
952 | ||
953 | usblp->present = 1; | |
954 | ||
955 | retval = usb_register_dev(intf, &usblp_class); | |
956 | if (retval) { | |
957 | err("Not able to get a minor for this device."); | |
958 | goto abort_intfdata; | |
959 | } | |
960 | usblp->minor = intf->minor; | |
961 | ||
962 | return 0; | |
963 | ||
964 | abort_intfdata: | |
965 | usb_set_intfdata (intf, NULL); | |
966 | abort: | |
967 | if (usblp) { | |
968 | if (usblp->writebuf) | |
969 | usb_buffer_free (usblp->dev, USBLP_BUF_SIZE, | |
970 | usblp->writebuf, usblp->writeurb->transfer_dma); | |
971 | if (usblp->readbuf) | |
972 | usb_buffer_free (usblp->dev, USBLP_BUF_SIZE, | |
973 | usblp->readbuf, usblp->writeurb->transfer_dma); | |
974 | kfree(usblp->statusbuf); | |
975 | kfree(usblp->device_id_string); | |
976 | usb_free_urb(usblp->writeurb); | |
977 | usb_free_urb(usblp->readurb); | |
978 | kfree(usblp); | |
979 | } | |
980 | return -EIO; | |
981 | } | |
982 | ||
983 | /* | |
984 | * We are a "new" style driver with usb_device_id table, | |
985 | * but our requirements are too intricate for simple match to handle. | |
986 | * | |
987 | * The "proto_bias" option may be used to specify the preferred protocol | |
988 | * for all USB printers (1=7/1/1, 2=7/1/2, 3=7/1/3). If the device | |
989 | * supports the preferred protocol, then we bind to it. | |
990 | * | |
991 | * The best interface for us is 7/1/2, because it is compatible | |
992 | * with a stream of characters. If we find it, we bind to it. | |
993 | * | |
994 | * Note that the people from hpoj.sourceforge.net need to be able to | |
995 | * bind to 7/1/3 (MLC/1284.4), so we provide them ioctls for this purpose. | |
996 | * | |
997 | * Failing 7/1/2, we look for 7/1/3, even though it's probably not | |
998 | * stream-compatible, because this matches the behaviour of the old code. | |
999 | * | |
1000 | * If nothing else, we bind to 7/1/1 - the unidirectional interface. | |
1001 | */ | |
1002 | static int usblp_select_alts(struct usblp *usblp) | |
1003 | { | |
1004 | struct usb_interface *if_alt; | |
1005 | struct usb_host_interface *ifd; | |
1006 | struct usb_endpoint_descriptor *epd, *epwrite, *epread; | |
1007 | int p, i, e; | |
1008 | ||
1009 | if_alt = usblp->intf; | |
1010 | ||
1011 | for (p = 0; p < USBLP_MAX_PROTOCOLS; p++) | |
1012 | usblp->protocol[p].alt_setting = -1; | |
1013 | ||
1014 | /* Find out what we have. */ | |
1015 | for (i = 0; i < if_alt->num_altsetting; i++) { | |
1016 | ifd = &if_alt->altsetting[i]; | |
1017 | ||
1018 | if (ifd->desc.bInterfaceClass != 7 || ifd->desc.bInterfaceSubClass != 1) | |
1019 | continue; | |
1020 | ||
1021 | if (ifd->desc.bInterfaceProtocol < USBLP_FIRST_PROTOCOL || | |
1022 | ifd->desc.bInterfaceProtocol > USBLP_LAST_PROTOCOL) | |
1023 | continue; | |
1024 | ||
1025 | /* Look for bulk OUT and IN endpoints. */ | |
1026 | epwrite = epread = NULL; | |
1027 | for (e = 0; e < ifd->desc.bNumEndpoints; e++) { | |
1028 | epd = &ifd->endpoint[e].desc; | |
1029 | ||
1030 | if ((epd->bmAttributes&USB_ENDPOINT_XFERTYPE_MASK)!= | |
1031 | USB_ENDPOINT_XFER_BULK) | |
1032 | continue; | |
1033 | ||
1034 | if (!(epd->bEndpointAddress & USB_ENDPOINT_DIR_MASK)) { | |
1035 | if (!epwrite) | |
1036 | epwrite = epd; | |
1037 | ||
1038 | } else { | |
1039 | if (!epread) | |
1040 | epread = epd; | |
1041 | } | |
1042 | } | |
1043 | ||
1044 | /* Ignore buggy hardware without the right endpoints. */ | |
1045 | if (!epwrite || (ifd->desc.bInterfaceProtocol > 1 && !epread)) | |
1046 | continue; | |
1047 | ||
1048 | /* Turn off reads for 7/1/1 (unidirectional) interfaces | |
1049 | * and buggy bidirectional printers. */ | |
1050 | if (ifd->desc.bInterfaceProtocol == 1) { | |
1051 | epread = NULL; | |
1052 | } else if (usblp->quirks & USBLP_QUIRK_BIDIR) { | |
1053 | info("Disabling reads from problem bidirectional " | |
1054 | "printer on usblp%d", usblp->minor); | |
1055 | epread = NULL; | |
1056 | } | |
1057 | ||
1058 | usblp->protocol[ifd->desc.bInterfaceProtocol].alt_setting = | |
1059 | ifd->desc.bAlternateSetting; | |
1060 | usblp->protocol[ifd->desc.bInterfaceProtocol].epwrite = epwrite; | |
1061 | usblp->protocol[ifd->desc.bInterfaceProtocol].epread = epread; | |
1062 | } | |
1063 | ||
1064 | /* If our requested protocol is supported, then use it. */ | |
1065 | if (proto_bias >= USBLP_FIRST_PROTOCOL && | |
1066 | proto_bias <= USBLP_LAST_PROTOCOL && | |
1067 | usblp->protocol[proto_bias].alt_setting != -1) | |
1068 | return proto_bias; | |
1069 | ||
1070 | /* Ordering is important here. */ | |
1071 | if (usblp->protocol[2].alt_setting != -1) | |
1072 | return 2; | |
1073 | if (usblp->protocol[1].alt_setting != -1) | |
1074 | return 1; | |
1075 | if (usblp->protocol[3].alt_setting != -1) | |
1076 | return 3; | |
1077 | ||
1078 | /* If nothing is available, then don't bind to this device. */ | |
1079 | return -1; | |
1080 | } | |
1081 | ||
1082 | static int usblp_set_protocol(struct usblp *usblp, int protocol) | |
1083 | { | |
1084 | int r, alts; | |
1085 | ||
1086 | if (protocol < USBLP_FIRST_PROTOCOL || protocol > USBLP_LAST_PROTOCOL) | |
1087 | return -EINVAL; | |
1088 | ||
1089 | alts = usblp->protocol[protocol].alt_setting; | |
1090 | if (alts < 0) | |
1091 | return -EINVAL; | |
1092 | r = usb_set_interface(usblp->dev, usblp->ifnum, alts); | |
1093 | if (r < 0) { | |
1094 | err("can't set desired altsetting %d on interface %d", | |
1095 | alts, usblp->ifnum); | |
1096 | return r; | |
1097 | } | |
1098 | ||
1099 | usb_fill_bulk_urb(usblp->writeurb, usblp->dev, | |
1100 | usb_sndbulkpipe(usblp->dev, | |
1101 | usblp->protocol[protocol].epwrite->bEndpointAddress), | |
1102 | usblp->writebuf, 0, | |
1103 | usblp_bulk_write, usblp); | |
1104 | ||
1105 | usblp->bidir = (usblp->protocol[protocol].epread != NULL); | |
1106 | if (usblp->bidir) | |
1107 | usb_fill_bulk_urb(usblp->readurb, usblp->dev, | |
1108 | usb_rcvbulkpipe(usblp->dev, | |
1109 | usblp->protocol[protocol].epread->bEndpointAddress), | |
1110 | usblp->readbuf, USBLP_BUF_SIZE, | |
1111 | usblp_bulk_read, usblp); | |
1112 | ||
1113 | usblp->current_protocol = protocol; | |
1114 | dbg("usblp%d set protocol %d", usblp->minor, protocol); | |
1115 | return 0; | |
1116 | } | |
1117 | ||
1118 | /* Retrieves and caches device ID string. | |
1119 | * Returns length, including length bytes but not null terminator. | |
1120 | * On error, returns a negative errno value. */ | |
1121 | static int usblp_cache_device_id_string(struct usblp *usblp) | |
1122 | { | |
1123 | int err, length; | |
1124 | ||
1125 | err = usblp_get_id(usblp, 0, usblp->device_id_string, USBLP_DEVICE_ID_SIZE - 1); | |
1126 | if (err < 0) { | |
1127 | dbg("usblp%d: error = %d reading IEEE-1284 Device ID string", | |
1128 | usblp->minor, err); | |
1129 | usblp->device_id_string[0] = usblp->device_id_string[1] = '\0'; | |
1130 | return -EIO; | |
1131 | } | |
1132 | ||
1133 | /* First two bytes are length in big-endian. | |
1134 | * They count themselves, and we copy them into | |
1135 | * the user's buffer. */ | |
1136 | length = be16_to_cpu(*((__be16 *)usblp->device_id_string)); | |
1137 | if (length < 2) | |
1138 | length = 2; | |
1139 | else if (length >= USBLP_DEVICE_ID_SIZE) | |
1140 | length = USBLP_DEVICE_ID_SIZE - 1; | |
1141 | usblp->device_id_string[length] = '\0'; | |
1142 | ||
1143 | dbg("usblp%d Device ID string [len=%d]=\"%s\"", | |
1144 | usblp->minor, length, &usblp->device_id_string[2]); | |
1145 | ||
1146 | return length; | |
1147 | } | |
1148 | ||
1149 | static void usblp_disconnect(struct usb_interface *intf) | |
1150 | { | |
1151 | struct usblp *usblp = usb_get_intfdata (intf); | |
1152 | ||
1153 | usb_deregister_dev(intf, &usblp_class); | |
1154 | ||
1155 | if (!usblp || !usblp->dev) { | |
1156 | err("bogus disconnect"); | |
1157 | BUG (); | |
1158 | } | |
1159 | ||
1160 | down (&usblp_sem); | |
1161 | down (&usblp->sem); | |
1162 | usblp->present = 0; | |
1163 | usb_set_intfdata (intf, NULL); | |
1164 | ||
1165 | usblp_unlink_urbs(usblp); | |
1166 | usb_buffer_free (usblp->dev, USBLP_BUF_SIZE, | |
1167 | usblp->writebuf, usblp->writeurb->transfer_dma); | |
1168 | usb_buffer_free (usblp->dev, USBLP_BUF_SIZE, | |
1169 | usblp->readbuf, usblp->readurb->transfer_dma); | |
1170 | up (&usblp->sem); | |
1171 | ||
1172 | if (!usblp->used) | |
1173 | usblp_cleanup (usblp); | |
1174 | up (&usblp_sem); | |
1175 | } | |
1176 | ||
1177 | static struct usb_device_id usblp_ids [] = { | |
1178 | { USB_DEVICE_INFO(7, 1, 1) }, | |
1179 | { USB_DEVICE_INFO(7, 1, 2) }, | |
1180 | { USB_DEVICE_INFO(7, 1, 3) }, | |
1181 | { USB_INTERFACE_INFO(7, 1, 1) }, | |
1182 | { USB_INTERFACE_INFO(7, 1, 2) }, | |
1183 | { USB_INTERFACE_INFO(7, 1, 3) }, | |
1184 | { } /* Terminating entry */ | |
1185 | }; | |
1186 | ||
1187 | MODULE_DEVICE_TABLE (usb, usblp_ids); | |
1188 | ||
1189 | static struct usb_driver usblp_driver = { | |
1190 | .owner = THIS_MODULE, | |
1191 | .name = "usblp", | |
1192 | .probe = usblp_probe, | |
1193 | .disconnect = usblp_disconnect, | |
1194 | .id_table = usblp_ids, | |
1195 | }; | |
1196 | ||
1197 | static int __init usblp_init(void) | |
1198 | { | |
1199 | int retval; | |
1200 | retval = usb_register(&usblp_driver); | |
1201 | if (retval) | |
1202 | goto out; | |
1203 | info(DRIVER_VERSION ": " DRIVER_DESC); | |
1204 | out: | |
1205 | return retval; | |
1206 | } | |
1207 | ||
1208 | static void __exit usblp_exit(void) | |
1209 | { | |
1210 | usb_deregister(&usblp_driver); | |
1211 | } | |
1212 | ||
1213 | module_init(usblp_init); | |
1214 | module_exit(usblp_exit); | |
1215 | ||
1216 | MODULE_AUTHOR( DRIVER_AUTHOR ); | |
1217 | MODULE_DESCRIPTION( DRIVER_DESC ); | |
1218 | module_param(proto_bias, int, S_IRUGO | S_IWUSR); | |
1219 | MODULE_PARM_DESC(proto_bias, "Favourite protocol number"); | |
1220 | MODULE_LICENSE("GPL"); |