Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * usblp.c Version 0.13 | |
3 | * | |
4 | * Copyright (c) 1999 Michael Gee <michael@linuxspecific.com> | |
5 | * Copyright (c) 1999 Pavel Machek <pavel@suse.cz> | |
f4b09ebc | 6 | * Copyright (c) 2000 Randy Dunlap <rdunlap@xenotime.net> |
1da177e4 LT |
7 | * Copyright (c) 2000 Vojtech Pavlik <vojtech@suse.cz> |
8 | # Copyright (c) 2001 Pete Zaitcev <zaitcev@redhat.com> | |
9 | # Copyright (c) 2001 David Paschal <paschal@rcsis.com> | |
8e695cdb | 10 | * Copyright (c) 2006 Oliver Neukum <oliver@neukum.name> |
1da177e4 LT |
11 | * |
12 | * USB Printer Device Class driver for USB printers and printer cables | |
13 | * | |
14 | * Sponsored by SuSE | |
15 | * | |
16 | * ChangeLog: | |
17 | * v0.1 - thorough cleaning, URBification, almost a rewrite | |
18 | * v0.2 - some more cleanups | |
19 | * v0.3 - cleaner again, waitqueue fixes | |
20 | * v0.4 - fixes in unidirectional mode | |
21 | * v0.5 - add DEVICE_ID string support | |
22 | * v0.6 - never time out | |
23 | * v0.7 - fixed bulk-IN read and poll (David Paschal) | |
24 | * v0.8 - add devfs support | |
25 | * v0.9 - fix unplug-while-open paths | |
26 | * v0.10- remove sleep_on, fix error on oom (oliver@neukum.org) | |
27 | * v0.11 - add proto_bias option (Pete Zaitcev) | |
28 | * v0.12 - add hpoj.sourceforge.net ioctls (David Paschal) | |
29 | * v0.13 - alloc space for statusbuf (<status> not on stack); | |
30 | * use usb_buffer_alloc() for read buf & write buf; | |
31 | */ | |
32 | ||
33 | /* | |
34 | * This program is free software; you can redistribute it and/or modify | |
35 | * it under the terms of the GNU General Public License as published by | |
36 | * the Free Software Foundation; either version 2 of the License, or | |
37 | * (at your option) any later version. | |
38 | * | |
39 | * This program is distributed in the hope that it will be useful, | |
40 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
41 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
42 | * GNU General Public License for more details. | |
43 | * | |
44 | * You should have received a copy of the GNU General Public License | |
45 | * along with this program; if not, write to the Free Software | |
46 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
47 | */ | |
48 | ||
49 | #include <linux/module.h> | |
50 | #include <linux/kernel.h> | |
51 | #include <linux/sched.h> | |
52 | #include <linux/smp_lock.h> | |
53 | #include <linux/signal.h> | |
54 | #include <linux/poll.h> | |
55 | #include <linux/init.h> | |
56 | #include <linux/slab.h> | |
57 | #include <linux/lp.h> | |
58 | #undef DEBUG | |
59 | #include <linux/usb.h> | |
60 | ||
61 | /* | |
62 | * Version Information | |
63 | */ | |
64 | #define DRIVER_VERSION "v0.13" | |
65 | #define DRIVER_AUTHOR "Michael Gee, Pavel Machek, Vojtech Pavlik, Randy Dunlap, Pete Zaitcev, David Paschal" | |
66 | #define DRIVER_DESC "USB Printer Device Class driver" | |
67 | ||
68 | #define USBLP_BUF_SIZE 8192 | |
69 | #define USBLP_DEVICE_ID_SIZE 1024 | |
70 | ||
71 | /* ioctls: */ | |
72 | #define LPGETSTATUS 0x060b /* same as in drivers/char/lp.c */ | |
73 | #define IOCNR_GET_DEVICE_ID 1 | |
74 | #define IOCNR_GET_PROTOCOLS 2 | |
75 | #define IOCNR_SET_PROTOCOL 3 | |
76 | #define IOCNR_HP_SET_CHANNEL 4 | |
77 | #define IOCNR_GET_BUS_ADDRESS 5 | |
78 | #define IOCNR_GET_VID_PID 6 | |
79 | #define IOCNR_SOFT_RESET 7 | |
80 | /* Get device_id string: */ | |
81 | #define LPIOC_GET_DEVICE_ID(len) _IOC(_IOC_READ, 'P', IOCNR_GET_DEVICE_ID, len) | |
82 | /* The following ioctls were added for http://hpoj.sourceforge.net: */ | |
83 | /* Get two-int array: | |
84 | * [0]=current protocol (1=7/1/1, 2=7/1/2, 3=7/1/3), | |
85 | * [1]=supported protocol mask (mask&(1<<n)!=0 means 7/1/n supported): */ | |
86 | #define LPIOC_GET_PROTOCOLS(len) _IOC(_IOC_READ, 'P', IOCNR_GET_PROTOCOLS, len) | |
87 | /* Set protocol (arg: 1=7/1/1, 2=7/1/2, 3=7/1/3): */ | |
88 | #define LPIOC_SET_PROTOCOL _IOC(_IOC_WRITE, 'P', IOCNR_SET_PROTOCOL, 0) | |
89 | /* Set channel number (HP Vendor-specific command): */ | |
90 | #define LPIOC_HP_SET_CHANNEL _IOC(_IOC_WRITE, 'P', IOCNR_HP_SET_CHANNEL, 0) | |
91 | /* Get two-int array: [0]=bus number, [1]=device address: */ | |
92 | #define LPIOC_GET_BUS_ADDRESS(len) _IOC(_IOC_READ, 'P', IOCNR_GET_BUS_ADDRESS, len) | |
93 | /* Get two-int array: [0]=vendor ID, [1]=product ID: */ | |
94 | #define LPIOC_GET_VID_PID(len) _IOC(_IOC_READ, 'P', IOCNR_GET_VID_PID, len) | |
95 | /* Perform class specific soft reset */ | |
96 | #define LPIOC_SOFT_RESET _IOC(_IOC_NONE, 'P', IOCNR_SOFT_RESET, 0); | |
97 | ||
98 | /* | |
99 | * A DEVICE_ID string may include the printer's serial number. | |
100 | * It should end with a semi-colon (';'). | |
101 | * An example from an HP 970C DeskJet printer is (this is one long string, | |
102 | * with the serial number changed): | |
103 | 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: ; | |
104 | */ | |
105 | ||
106 | /* | |
107 | * USB Printer Requests | |
108 | */ | |
109 | ||
110 | #define USBLP_REQ_GET_ID 0x00 | |
111 | #define USBLP_REQ_GET_STATUS 0x01 | |
112 | #define USBLP_REQ_RESET 0x02 | |
113 | #define USBLP_REQ_HP_CHANNEL_CHANGE_REQUEST 0x00 /* HP Vendor-specific */ | |
114 | ||
115 | #define USBLP_MINORS 16 | |
116 | #define USBLP_MINOR_BASE 0 | |
117 | ||
118 | #define USBLP_WRITE_TIMEOUT (5000) /* 5 seconds */ | |
119 | ||
120 | #define USBLP_FIRST_PROTOCOL 1 | |
121 | #define USBLP_LAST_PROTOCOL 3 | |
122 | #define USBLP_MAX_PROTOCOLS (USBLP_LAST_PROTOCOL+1) | |
123 | ||
124 | /* | |
125 | * some arbitrary status buffer size; | |
126 | * need a status buffer that is allocated via kmalloc(), not on stack | |
127 | */ | |
128 | #define STATUS_BUF_SIZE 8 | |
129 | ||
130 | struct usblp { | |
131 | struct usb_device *dev; /* USB device */ | |
132 | struct semaphore sem; /* locks this struct, especially "dev" */ | |
133 | char *writebuf; /* write transfer_buffer */ | |
134 | char *readbuf; /* read transfer_buffer */ | |
135 | char *statusbuf; /* status transfer_buffer */ | |
136 | struct urb *readurb, *writeurb; /* The urbs */ | |
137 | wait_queue_head_t wait; /* Zzzzz ... */ | |
138 | int readcount; /* Counter for reads */ | |
139 | int ifnum; /* Interface number */ | |
140 | struct usb_interface *intf; /* The interface */ | |
141 | /* Alternate-setting numbers and endpoints for each protocol | |
142 | * (7/1/{index=1,2,3}) that the device supports: */ | |
143 | struct { | |
144 | int alt_setting; | |
145 | struct usb_endpoint_descriptor *epwrite; | |
146 | struct usb_endpoint_descriptor *epread; | |
147 | } protocol[USBLP_MAX_PROTOCOLS]; | |
148 | int current_protocol; | |
149 | int minor; /* minor number of device */ | |
150 | int wcomplete; /* writing is completed */ | |
151 | int rcomplete; /* reading is completed */ | |
152 | unsigned int quirks; /* quirks flags */ | |
153 | unsigned char used; /* True if open */ | |
154 | unsigned char present; /* True if not disconnected */ | |
155 | unsigned char bidir; /* interface is bidirectional */ | |
156 | unsigned char *device_id_string; /* IEEE 1284 DEVICE ID string (ptr) */ | |
157 | /* first 2 bytes are (big-endian) length */ | |
158 | }; | |
159 | ||
160 | #ifdef DEBUG | |
161 | static void usblp_dump(struct usblp *usblp) { | |
162 | int p; | |
163 | ||
164 | dbg("usblp=0x%p", usblp); | |
165 | dbg("dev=0x%p", usblp->dev); | |
166 | dbg("present=%d", usblp->present); | |
167 | dbg("readbuf=0x%p", usblp->readbuf); | |
168 | dbg("writebuf=0x%p", usblp->writebuf); | |
169 | dbg("readurb=0x%p", usblp->readurb); | |
170 | dbg("writeurb=0x%p", usblp->writeurb); | |
171 | dbg("readcount=%d", usblp->readcount); | |
172 | dbg("ifnum=%d", usblp->ifnum); | |
173 | for (p = USBLP_FIRST_PROTOCOL; p <= USBLP_LAST_PROTOCOL; p++) { | |
174 | dbg("protocol[%d].alt_setting=%d", p, usblp->protocol[p].alt_setting); | |
175 | dbg("protocol[%d].epwrite=%p", p, usblp->protocol[p].epwrite); | |
176 | dbg("protocol[%d].epread=%p", p, usblp->protocol[p].epread); | |
177 | } | |
178 | dbg("current_protocol=%d", usblp->current_protocol); | |
179 | dbg("minor=%d", usblp->minor); | |
180 | dbg("wcomplete=%d", usblp->wcomplete); | |
181 | dbg("rcomplete=%d", usblp->rcomplete); | |
182 | dbg("quirks=%d", usblp->quirks); | |
183 | dbg("used=%d", usblp->used); | |
184 | dbg("bidir=%d", usblp->bidir); | |
185 | dbg("device_id_string=\"%s\"", | |
186 | usblp->device_id_string ? | |
187 | usblp->device_id_string + 2 : | |
188 | (unsigned char *)"(null)"); | |
189 | } | |
190 | #endif | |
191 | ||
192 | /* Quirks: various printer quirks are handled by this table & its flags. */ | |
193 | ||
194 | struct quirk_printer_struct { | |
195 | __u16 vendorId; | |
196 | __u16 productId; | |
197 | unsigned int quirks; | |
198 | }; | |
199 | ||
200 | #define USBLP_QUIRK_BIDIR 0x1 /* reports bidir but requires unidirectional mode (no INs/reads) */ | |
201 | #define USBLP_QUIRK_USB_INIT 0x2 /* needs vendor USB init string */ | |
202 | ||
4c4c9432 | 203 | static const struct quirk_printer_struct quirk_printers[] = { |
1da177e4 LT |
204 | { 0x03f0, 0x0004, USBLP_QUIRK_BIDIR }, /* HP DeskJet 895C */ |
205 | { 0x03f0, 0x0104, USBLP_QUIRK_BIDIR }, /* HP DeskJet 880C */ | |
206 | { 0x03f0, 0x0204, USBLP_QUIRK_BIDIR }, /* HP DeskJet 815C */ | |
207 | { 0x03f0, 0x0304, USBLP_QUIRK_BIDIR }, /* HP DeskJet 810C/812C */ | |
208 | { 0x03f0, 0x0404, USBLP_QUIRK_BIDIR }, /* HP DeskJet 830C */ | |
209 | { 0x03f0, 0x0504, USBLP_QUIRK_BIDIR }, /* HP DeskJet 885C */ | |
210 | { 0x03f0, 0x0604, USBLP_QUIRK_BIDIR }, /* HP DeskJet 840C */ | |
211 | { 0x03f0, 0x0804, USBLP_QUIRK_BIDIR }, /* HP DeskJet 816C */ | |
212 | { 0x03f0, 0x1104, USBLP_QUIRK_BIDIR }, /* HP Deskjet 959C */ | |
213 | { 0x0409, 0xefbe, USBLP_QUIRK_BIDIR }, /* NEC Picty900 (HP OEM) */ | |
214 | { 0x0409, 0xbef4, USBLP_QUIRK_BIDIR }, /* NEC Picty760 (HP OEM) */ | |
215 | { 0x0409, 0xf0be, USBLP_QUIRK_BIDIR }, /* NEC Picty920 (HP OEM) */ | |
216 | { 0x0409, 0xf1be, USBLP_QUIRK_BIDIR }, /* NEC Picty800 (HP OEM) */ | |
217 | { 0, 0 } | |
218 | }; | |
219 | ||
220 | static int usblp_select_alts(struct usblp *usblp); | |
221 | static int usblp_set_protocol(struct usblp *usblp, int protocol); | |
222 | static int usblp_cache_device_id_string(struct usblp *usblp); | |
223 | ||
224 | /* forward reference to make our lives easier */ | |
225 | static struct usb_driver usblp_driver; | |
226 | static DECLARE_MUTEX(usblp_sem); /* locks the existence of usblp's */ | |
227 | ||
228 | /* | |
229 | * Functions for usblp control messages. | |
230 | */ | |
231 | ||
232 | static int usblp_ctrl_msg(struct usblp *usblp, int request, int type, int dir, int recip, int value, void *buf, int len) | |
233 | { | |
234 | int retval; | |
235 | int index = usblp->ifnum; | |
236 | ||
237 | /* High byte has the interface index. | |
238 | Low byte has the alternate setting. | |
239 | */ | |
240 | if ((request == USBLP_REQ_GET_ID) && (type == USB_TYPE_CLASS)) { | |
241 | index = (usblp->ifnum<<8)|usblp->protocol[usblp->current_protocol].alt_setting; | |
242 | } | |
243 | ||
244 | retval = usb_control_msg(usblp->dev, | |
245 | dir ? usb_rcvctrlpipe(usblp->dev, 0) : usb_sndctrlpipe(usblp->dev, 0), | |
246 | request, type | dir | recip, value, index, buf, len, USBLP_WRITE_TIMEOUT); | |
247 | dbg("usblp_control_msg: rq: 0x%02x dir: %d recip: %d value: %d idx: %d len: %#x result: %d", | |
248 | request, !!dir, recip, value, index, len, retval); | |
249 | return retval < 0 ? retval : 0; | |
250 | } | |
251 | ||
252 | #define usblp_read_status(usblp, status)\ | |
253 | usblp_ctrl_msg(usblp, USBLP_REQ_GET_STATUS, USB_TYPE_CLASS, USB_DIR_IN, USB_RECIP_INTERFACE, 0, status, 1) | |
254 | #define usblp_get_id(usblp, config, id, maxlen)\ | |
255 | usblp_ctrl_msg(usblp, USBLP_REQ_GET_ID, USB_TYPE_CLASS, USB_DIR_IN, USB_RECIP_INTERFACE, config, id, maxlen) | |
256 | #define usblp_reset(usblp)\ | |
257 | usblp_ctrl_msg(usblp, USBLP_REQ_RESET, USB_TYPE_CLASS, USB_DIR_OUT, USB_RECIP_OTHER, 0, NULL, 0) | |
258 | ||
259 | #define usblp_hp_channel_change_request(usblp, channel, buffer) \ | |
260 | usblp_ctrl_msg(usblp, USBLP_REQ_HP_CHANNEL_CHANGE_REQUEST, USB_TYPE_VENDOR, USB_DIR_IN, USB_RECIP_INTERFACE, channel, buffer, 1) | |
261 | ||
262 | /* | |
263 | * See the description for usblp_select_alts() below for the usage | |
264 | * explanation. Look into your /proc/bus/usb/devices and dmesg in | |
265 | * case of any trouble. | |
266 | */ | |
267 | static int proto_bias = -1; | |
268 | ||
269 | /* | |
270 | * URB callback. | |
271 | */ | |
272 | ||
273 | static void usblp_bulk_read(struct urb *urb, struct pt_regs *regs) | |
274 | { | |
275 | struct usblp *usblp = urb->context; | |
276 | ||
8e695cdb | 277 | if (unlikely(!usblp || !usblp->dev || !usblp->used)) |
1da177e4 LT |
278 | return; |
279 | ||
8e695cdb ON |
280 | if (unlikely(!usblp->present)) |
281 | goto unplug; | |
1da177e4 LT |
282 | if (unlikely(urb->status)) |
283 | warn("usblp%d: nonzero read/write bulk status received: %d", | |
284 | usblp->minor, urb->status); | |
285 | usblp->rcomplete = 1; | |
8e695cdb | 286 | unplug: |
1da177e4 LT |
287 | wake_up_interruptible(&usblp->wait); |
288 | } | |
289 | ||
290 | static void usblp_bulk_write(struct urb *urb, struct pt_regs *regs) | |
291 | { | |
292 | struct usblp *usblp = urb->context; | |
293 | ||
8e695cdb | 294 | if (unlikely(!usblp || !usblp->dev || !usblp->used)) |
1da177e4 | 295 | return; |
8e695cdb ON |
296 | if (unlikely(!usblp->present)) |
297 | goto unplug; | |
1da177e4 LT |
298 | if (unlikely(urb->status)) |
299 | warn("usblp%d: nonzero read/write bulk status received: %d", | |
300 | usblp->minor, urb->status); | |
301 | usblp->wcomplete = 1; | |
8e695cdb | 302 | unplug: |
1da177e4 LT |
303 | wake_up_interruptible(&usblp->wait); |
304 | } | |
305 | ||
306 | /* | |
307 | * Get and print printer errors. | |
308 | */ | |
309 | ||
4c4c9432 | 310 | static const char *usblp_messages[] = { "ok", "out of paper", "off-line", "on fire" }; |
1da177e4 LT |
311 | |
312 | static int usblp_check_status(struct usblp *usblp, int err) | |
313 | { | |
314 | unsigned char status, newerr = 0; | |
315 | int error; | |
316 | ||
317 | error = usblp_read_status (usblp, usblp->statusbuf); | |
318 | if (error < 0) { | |
0bc8e009 RD |
319 | if (printk_ratelimit()) |
320 | err("usblp%d: error %d reading printer status", | |
321 | usblp->minor, error); | |
1da177e4 LT |
322 | return 0; |
323 | } | |
324 | ||
325 | status = *usblp->statusbuf; | |
326 | ||
327 | if (~status & LP_PERRORP) | |
328 | newerr = 3; | |
329 | if (status & LP_POUTPA) | |
330 | newerr = 1; | |
331 | if (~status & LP_PSELECD) | |
332 | newerr = 2; | |
333 | ||
334 | if (newerr != err) | |
335 | info("usblp%d: %s", usblp->minor, usblp_messages[newerr]); | |
336 | ||
337 | return newerr; | |
338 | } | |
339 | ||
340 | /* | |
341 | * File op functions. | |
342 | */ | |
343 | ||
344 | static int usblp_open(struct inode *inode, struct file *file) | |
345 | { | |
346 | int minor = iminor(inode); | |
347 | struct usblp *usblp; | |
348 | struct usb_interface *intf; | |
349 | int retval; | |
350 | ||
351 | if (minor < 0) | |
352 | return -ENODEV; | |
353 | ||
354 | down (&usblp_sem); | |
355 | ||
356 | retval = -ENODEV; | |
357 | intf = usb_find_interface(&usblp_driver, minor); | |
358 | if (!intf) { | |
359 | goto out; | |
360 | } | |
361 | usblp = usb_get_intfdata (intf); | |
362 | if (!usblp || !usblp->dev || !usblp->present) | |
363 | goto out; | |
364 | ||
365 | retval = -EBUSY; | |
366 | if (usblp->used) | |
367 | goto out; | |
368 | ||
369 | /* | |
370 | * TODO: need to implement LP_ABORTOPEN + O_NONBLOCK as in drivers/char/lp.c ??? | |
371 | * This is #if 0-ed because we *don't* want to fail an open | |
372 | * just because the printer is off-line. | |
373 | */ | |
374 | #if 0 | |
375 | if ((retval = usblp_check_status(usblp, 0))) { | |
376 | retval = retval > 1 ? -EIO : -ENOSPC; | |
377 | goto out; | |
378 | } | |
379 | #else | |
380 | retval = 0; | |
381 | #endif | |
382 | ||
383 | usblp->used = 1; | |
384 | file->private_data = usblp; | |
385 | ||
386 | usblp->writeurb->transfer_buffer_length = 0; | |
387 | usblp->wcomplete = 1; /* we begin writeable */ | |
388 | usblp->rcomplete = 0; | |
2c45b6fe AO |
389 | usblp->writeurb->status = 0; |
390 | usblp->readurb->status = 0; | |
1da177e4 LT |
391 | |
392 | if (usblp->bidir) { | |
393 | usblp->readcount = 0; | |
394 | usblp->readurb->dev = usblp->dev; | |
395 | if (usb_submit_urb(usblp->readurb, GFP_KERNEL) < 0) { | |
396 | retval = -EIO; | |
397 | usblp->used = 0; | |
398 | file->private_data = NULL; | |
399 | } | |
400 | } | |
401 | out: | |
402 | up (&usblp_sem); | |
403 | return retval; | |
404 | } | |
405 | ||
406 | static void usblp_cleanup (struct usblp *usblp) | |
407 | { | |
408 | info("usblp%d: removed", usblp->minor); | |
409 | ||
410 | kfree (usblp->device_id_string); | |
411 | kfree (usblp->statusbuf); | |
412 | usb_free_urb(usblp->writeurb); | |
413 | usb_free_urb(usblp->readurb); | |
414 | kfree (usblp); | |
415 | } | |
416 | ||
417 | static void usblp_unlink_urbs(struct usblp *usblp) | |
418 | { | |
419 | usb_kill_urb(usblp->writeurb); | |
420 | if (usblp->bidir) | |
421 | usb_kill_urb(usblp->readurb); | |
422 | } | |
423 | ||
424 | static int usblp_release(struct inode *inode, struct file *file) | |
425 | { | |
426 | struct usblp *usblp = file->private_data; | |
427 | ||
428 | down (&usblp_sem); | |
429 | usblp->used = 0; | |
430 | if (usblp->present) { | |
431 | usblp_unlink_urbs(usblp); | |
432 | } else /* finish cleanup from disconnect */ | |
433 | usblp_cleanup (usblp); | |
434 | up (&usblp_sem); | |
435 | return 0; | |
436 | } | |
437 | ||
438 | /* No kernel lock - fine */ | |
439 | static unsigned int usblp_poll(struct file *file, struct poll_table_struct *wait) | |
440 | { | |
441 | struct usblp *usblp = file->private_data; | |
442 | poll_wait(file, &usblp->wait, wait); | |
443 | return ((!usblp->bidir || !usblp->rcomplete) ? 0 : POLLIN | POLLRDNORM) | |
444 | | (!usblp->wcomplete ? 0 : POLLOUT | POLLWRNORM); | |
445 | } | |
446 | ||
318e479e | 447 | static long usblp_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
1da177e4 LT |
448 | { |
449 | struct usblp *usblp = file->private_data; | |
450 | int length, err, i; | |
451 | unsigned char newChannel; | |
452 | int status; | |
453 | int twoints[2]; | |
454 | int retval = 0; | |
455 | ||
456 | down (&usblp->sem); | |
457 | if (!usblp->present) { | |
458 | retval = -ENODEV; | |
459 | goto done; | |
460 | } | |
461 | ||
462 | dbg("usblp_ioctl: cmd=0x%x (%c nr=%d len=%d dir=%d)", cmd, _IOC_TYPE(cmd), | |
463 | _IOC_NR(cmd), _IOC_SIZE(cmd), _IOC_DIR(cmd) ); | |
464 | ||
465 | if (_IOC_TYPE(cmd) == 'P') /* new-style ioctl number */ | |
466 | ||
467 | switch (_IOC_NR(cmd)) { | |
468 | ||
469 | case IOCNR_GET_DEVICE_ID: /* get the DEVICE_ID string */ | |
470 | if (_IOC_DIR(cmd) != _IOC_READ) { | |
471 | retval = -EINVAL; | |
472 | goto done; | |
473 | } | |
474 | ||
475 | length = usblp_cache_device_id_string(usblp); | |
476 | if (length < 0) { | |
477 | retval = length; | |
478 | goto done; | |
479 | } | |
480 | if (length > _IOC_SIZE(cmd)) | |
481 | length = _IOC_SIZE(cmd); /* truncate */ | |
482 | ||
483 | if (copy_to_user((void __user *) arg, | |
484 | usblp->device_id_string, | |
485 | (unsigned long) length)) { | |
486 | retval = -EFAULT; | |
487 | goto done; | |
488 | } | |
489 | ||
490 | break; | |
491 | ||
492 | case IOCNR_GET_PROTOCOLS: | |
493 | if (_IOC_DIR(cmd) != _IOC_READ || | |
494 | _IOC_SIZE(cmd) < sizeof(twoints)) { | |
495 | retval = -EINVAL; | |
496 | goto done; | |
497 | } | |
498 | ||
499 | twoints[0] = usblp->current_protocol; | |
500 | twoints[1] = 0; | |
501 | for (i = USBLP_FIRST_PROTOCOL; | |
502 | i <= USBLP_LAST_PROTOCOL; i++) { | |
503 | if (usblp->protocol[i].alt_setting >= 0) | |
504 | twoints[1] |= (1<<i); | |
505 | } | |
506 | ||
507 | if (copy_to_user((void __user *)arg, | |
508 | (unsigned char *)twoints, | |
509 | sizeof(twoints))) { | |
510 | retval = -EFAULT; | |
511 | goto done; | |
512 | } | |
513 | ||
514 | break; | |
515 | ||
516 | case IOCNR_SET_PROTOCOL: | |
517 | if (_IOC_DIR(cmd) != _IOC_WRITE) { | |
518 | retval = -EINVAL; | |
519 | goto done; | |
520 | } | |
521 | ||
522 | #ifdef DEBUG | |
523 | if (arg == -10) { | |
524 | usblp_dump(usblp); | |
525 | break; | |
526 | } | |
527 | #endif | |
528 | ||
529 | usblp_unlink_urbs(usblp); | |
530 | retval = usblp_set_protocol(usblp, arg); | |
531 | if (retval < 0) { | |
532 | usblp_set_protocol(usblp, | |
533 | usblp->current_protocol); | |
534 | } | |
535 | break; | |
536 | ||
537 | case IOCNR_HP_SET_CHANNEL: | |
538 | if (_IOC_DIR(cmd) != _IOC_WRITE || | |
539 | le16_to_cpu(usblp->dev->descriptor.idVendor) != 0x03F0 || | |
540 | usblp->quirks & USBLP_QUIRK_BIDIR) { | |
541 | retval = -EINVAL; | |
542 | goto done; | |
543 | } | |
544 | ||
545 | err = usblp_hp_channel_change_request(usblp, | |
546 | arg, &newChannel); | |
547 | if (err < 0) { | |
548 | err("usblp%d: error = %d setting " | |
549 | "HP channel", | |
550 | usblp->minor, err); | |
551 | retval = -EIO; | |
552 | goto done; | |
553 | } | |
554 | ||
555 | dbg("usblp%d requested/got HP channel %ld/%d", | |
556 | usblp->minor, arg, newChannel); | |
557 | break; | |
558 | ||
559 | case IOCNR_GET_BUS_ADDRESS: | |
560 | if (_IOC_DIR(cmd) != _IOC_READ || | |
561 | _IOC_SIZE(cmd) < sizeof(twoints)) { | |
562 | retval = -EINVAL; | |
563 | goto done; | |
564 | } | |
565 | ||
566 | twoints[0] = usblp->dev->bus->busnum; | |
567 | twoints[1] = usblp->dev->devnum; | |
568 | if (copy_to_user((void __user *)arg, | |
569 | (unsigned char *)twoints, | |
570 | sizeof(twoints))) { | |
571 | retval = -EFAULT; | |
572 | goto done; | |
573 | } | |
574 | ||
575 | dbg("usblp%d is bus=%d, device=%d", | |
576 | usblp->minor, twoints[0], twoints[1]); | |
577 | break; | |
578 | ||
579 | case IOCNR_GET_VID_PID: | |
580 | if (_IOC_DIR(cmd) != _IOC_READ || | |
581 | _IOC_SIZE(cmd) < sizeof(twoints)) { | |
582 | retval = -EINVAL; | |
583 | goto done; | |
584 | } | |
585 | ||
586 | twoints[0] = le16_to_cpu(usblp->dev->descriptor.idVendor); | |
587 | twoints[1] = le16_to_cpu(usblp->dev->descriptor.idProduct); | |
588 | if (copy_to_user((void __user *)arg, | |
589 | (unsigned char *)twoints, | |
590 | sizeof(twoints))) { | |
591 | retval = -EFAULT; | |
592 | goto done; | |
593 | } | |
594 | ||
595 | dbg("usblp%d is VID=0x%4.4X, PID=0x%4.4X", | |
596 | usblp->minor, twoints[0], twoints[1]); | |
597 | break; | |
598 | ||
599 | case IOCNR_SOFT_RESET: | |
600 | if (_IOC_DIR(cmd) != _IOC_NONE) { | |
601 | retval = -EINVAL; | |
602 | goto done; | |
603 | } | |
604 | retval = usblp_reset(usblp); | |
605 | break; | |
606 | default: | |
607 | retval = -ENOTTY; | |
608 | } | |
609 | else /* old-style ioctl value */ | |
610 | switch (cmd) { | |
611 | ||
612 | case LPGETSTATUS: | |
613 | if (usblp_read_status(usblp, usblp->statusbuf)) { | |
0bc8e009 RD |
614 | if (printk_ratelimit()) |
615 | err("usblp%d: failed reading printer status", | |
616 | usblp->minor); | |
1da177e4 LT |
617 | retval = -EIO; |
618 | goto done; | |
619 | } | |
620 | status = *usblp->statusbuf; | |
621 | if (copy_to_user ((void __user *)arg, &status, sizeof(int))) | |
622 | retval = -EFAULT; | |
623 | break; | |
624 | ||
625 | default: | |
626 | retval = -ENOTTY; | |
627 | } | |
628 | ||
629 | done: | |
630 | up (&usblp->sem); | |
631 | return retval; | |
632 | } | |
633 | ||
634 | static ssize_t usblp_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos) | |
635 | { | |
1da177e4 | 636 | struct usblp *usblp = file->private_data; |
8e695cdb | 637 | int timeout, rv, err = 0, transfer_length = 0; |
1da177e4 LT |
638 | size_t writecount = 0; |
639 | ||
640 | while (writecount < count) { | |
641 | if (!usblp->wcomplete) { | |
642 | barrier(); | |
643 | if (file->f_flags & O_NONBLOCK) { | |
644 | writecount += transfer_length; | |
645 | return writecount ? writecount : -EAGAIN; | |
646 | } | |
647 | ||
648 | timeout = USBLP_WRITE_TIMEOUT; | |
1da177e4 | 649 | |
8e695cdb ON |
650 | rv = wait_event_interruptible_timeout(usblp->wait, usblp->wcomplete || !usblp->present , timeout); |
651 | if (rv < 0) | |
652 | return writecount ? writecount : -EINTR; | |
1da177e4 | 653 | } |
1da177e4 LT |
654 | down (&usblp->sem); |
655 | if (!usblp->present) { | |
656 | up (&usblp->sem); | |
657 | return -ENODEV; | |
658 | } | |
659 | ||
660 | if (usblp->writeurb->status != 0) { | |
661 | if (usblp->quirks & USBLP_QUIRK_BIDIR) { | |
662 | if (!usblp->wcomplete) | |
663 | err("usblp%d: error %d writing to printer", | |
664 | usblp->minor, usblp->writeurb->status); | |
665 | err = usblp->writeurb->status; | |
666 | } else | |
667 | err = usblp_check_status(usblp, err); | |
668 | up (&usblp->sem); | |
669 | ||
670 | /* if the fault was due to disconnect, let khubd's | |
671 | * call to usblp_disconnect() grab usblp->sem ... | |
672 | */ | |
673 | schedule (); | |
674 | continue; | |
675 | } | |
676 | ||
677 | /* We must increment writecount here, and not at the | |
678 | * end of the loop. Otherwise, the final loop iteration may | |
679 | * be skipped, leading to incomplete printer output. | |
680 | */ | |
681 | writecount += transfer_length; | |
682 | if (writecount == count) { | |
683 | up(&usblp->sem); | |
684 | break; | |
685 | } | |
686 | ||
687 | transfer_length=(count - writecount); | |
688 | if (transfer_length > USBLP_BUF_SIZE) | |
689 | transfer_length = USBLP_BUF_SIZE; | |
690 | ||
691 | usblp->writeurb->transfer_buffer_length = transfer_length; | |
692 | ||
693 | if (copy_from_user(usblp->writeurb->transfer_buffer, | |
694 | buffer + writecount, transfer_length)) { | |
695 | up(&usblp->sem); | |
696 | return writecount ? writecount : -EFAULT; | |
697 | } | |
698 | ||
699 | usblp->writeurb->dev = usblp->dev; | |
700 | usblp->wcomplete = 0; | |
701 | err = usb_submit_urb(usblp->writeurb, GFP_KERNEL); | |
702 | if (err) { | |
703 | if (err != -ENOMEM) | |
704 | count = -EIO; | |
705 | else | |
706 | count = writecount ? writecount : -ENOMEM; | |
707 | up (&usblp->sem); | |
708 | break; | |
709 | } | |
710 | up (&usblp->sem); | |
711 | } | |
712 | ||
713 | return count; | |
714 | } | |
715 | ||
716 | static ssize_t usblp_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos) | |
717 | { | |
718 | struct usblp *usblp = file->private_data; | |
8e695cdb | 719 | int rv; |
1da177e4 LT |
720 | |
721 | if (!usblp->bidir) | |
722 | return -EINVAL; | |
723 | ||
724 | down (&usblp->sem); | |
725 | if (!usblp->present) { | |
726 | count = -ENODEV; | |
727 | goto done; | |
728 | } | |
729 | ||
730 | if (!usblp->rcomplete) { | |
731 | barrier(); | |
732 | ||
733 | if (file->f_flags & O_NONBLOCK) { | |
734 | count = -EAGAIN; | |
735 | goto done; | |
736 | } | |
8e695cdb ON |
737 | up(&usblp->sem); |
738 | rv = wait_event_interruptible(usblp->wait, usblp->rcomplete || !usblp->present); | |
739 | down(&usblp->sem); | |
740 | if (rv < 0) { | |
741 | count = -EINTR; | |
742 | goto done; | |
1da177e4 | 743 | } |
1da177e4 LT |
744 | } |
745 | ||
746 | if (!usblp->present) { | |
747 | count = -ENODEV; | |
748 | goto done; | |
749 | } | |
750 | ||
751 | if (usblp->readurb->status) { | |
752 | err("usblp%d: error %d reading from printer", | |
753 | usblp->minor, usblp->readurb->status); | |
754 | usblp->readurb->dev = usblp->dev; | |
755 | usblp->readcount = 0; | |
756 | usblp->rcomplete = 0; | |
757 | if (usb_submit_urb(usblp->readurb, GFP_KERNEL) < 0) | |
758 | dbg("error submitting urb"); | |
759 | count = -EIO; | |
760 | goto done; | |
761 | } | |
762 | ||
763 | count = count < usblp->readurb->actual_length - usblp->readcount ? | |
764 | count : usblp->readurb->actual_length - usblp->readcount; | |
765 | ||
766 | if (copy_to_user(buffer, usblp->readurb->transfer_buffer + usblp->readcount, count)) { | |
767 | count = -EFAULT; | |
768 | goto done; | |
769 | } | |
770 | ||
771 | if ((usblp->readcount += count) == usblp->readurb->actual_length) { | |
772 | usblp->readcount = 0; | |
773 | usblp->readurb->dev = usblp->dev; | |
774 | usblp->rcomplete = 0; | |
775 | if (usb_submit_urb(usblp->readurb, GFP_KERNEL)) { | |
776 | count = -EIO; | |
777 | goto done; | |
778 | } | |
779 | } | |
780 | ||
781 | done: | |
782 | up (&usblp->sem); | |
783 | return count; | |
784 | } | |
785 | ||
786 | /* | |
787 | * Checks for printers that have quirks, such as requiring unidirectional | |
788 | * communication but reporting bidirectional; currently some HP printers | |
789 | * have this flaw (HP 810, 880, 895, etc.), or needing an init string | |
790 | * sent at each open (like some Epsons). | |
791 | * Returns 1 if found, 0 if not found. | |
792 | * | |
793 | * HP recommended that we use the bidirectional interface but | |
794 | * don't attempt any bulk IN transfers from the IN endpoint. | |
795 | * Here's some more detail on the problem: | |
796 | * The problem is not that it isn't bidirectional though. The problem | |
797 | * is that if you request a device ID, or status information, while | |
798 | * the buffers are full, the return data will end up in the print data | |
799 | * buffer. For example if you make sure you never request the device ID | |
800 | * while you are sending print data, and you don't try to query the | |
801 | * printer status every couple of milliseconds, you will probably be OK. | |
802 | */ | |
803 | static unsigned int usblp_quirks (__u16 vendor, __u16 product) | |
804 | { | |
805 | int i; | |
806 | ||
807 | for (i = 0; quirk_printers[i].vendorId; i++) { | |
808 | if (vendor == quirk_printers[i].vendorId && | |
809 | product == quirk_printers[i].productId) | |
810 | return quirk_printers[i].quirks; | |
811 | } | |
812 | return 0; | |
813 | } | |
814 | ||
815 | static struct file_operations usblp_fops = { | |
816 | .owner = THIS_MODULE, | |
817 | .read = usblp_read, | |
818 | .write = usblp_write, | |
819 | .poll = usblp_poll, | |
318e479e PZ |
820 | .unlocked_ioctl = usblp_ioctl, |
821 | .compat_ioctl = usblp_ioctl, | |
1da177e4 LT |
822 | .open = usblp_open, |
823 | .release = usblp_release, | |
824 | }; | |
825 | ||
826 | static struct usb_class_driver usblp_class = { | |
d6e5bcf4 | 827 | .name = "lp%d", |
1da177e4 | 828 | .fops = &usblp_fops, |
1da177e4 LT |
829 | .minor_base = USBLP_MINOR_BASE, |
830 | }; | |
831 | ||
a9714c84 DW |
832 | static ssize_t usblp_show_ieee1284_id(struct device *dev, struct device_attribute *attr, char *buf) |
833 | { | |
834 | struct usb_interface *intf = to_usb_interface(dev); | |
835 | struct usblp *usblp = usb_get_intfdata (intf); | |
836 | ||
837 | if (usblp->device_id_string[0] == 0 && | |
838 | usblp->device_id_string[1] == 0) | |
839 | return 0; | |
840 | ||
841 | return sprintf(buf, "%s", usblp->device_id_string+2); | |
842 | } | |
843 | ||
844 | static DEVICE_ATTR(ieee1284_id, S_IRUGO, usblp_show_ieee1284_id, NULL); | |
845 | ||
1da177e4 LT |
846 | static int usblp_probe(struct usb_interface *intf, |
847 | const struct usb_device_id *id) | |
848 | { | |
849 | struct usb_device *dev = interface_to_usbdev (intf); | |
850 | struct usblp *usblp = NULL; | |
851 | int protocol; | |
852 | int retval; | |
853 | ||
854 | /* Malloc and start initializing usblp structure so we can use it | |
855 | * directly. */ | |
8e695cdb | 856 | if (!(usblp = kzalloc(sizeof(struct usblp), GFP_KERNEL))) { |
1da177e4 LT |
857 | err("out of memory for usblp"); |
858 | goto abort; | |
859 | } | |
1da177e4 LT |
860 | usblp->dev = dev; |
861 | init_MUTEX (&usblp->sem); | |
862 | init_waitqueue_head(&usblp->wait); | |
863 | usblp->ifnum = intf->cur_altsetting->desc.bInterfaceNumber; | |
864 | usblp->intf = intf; | |
865 | ||
866 | usblp->writeurb = usb_alloc_urb(0, GFP_KERNEL); | |
867 | if (!usblp->writeurb) { | |
868 | err("out of memory"); | |
869 | goto abort; | |
870 | } | |
871 | usblp->readurb = usb_alloc_urb(0, GFP_KERNEL); | |
872 | if (!usblp->readurb) { | |
873 | err("out of memory"); | |
874 | goto abort; | |
875 | } | |
876 | ||
877 | /* Malloc device ID string buffer to the largest expected length, | |
878 | * since we can re-query it on an ioctl and a dynamic string | |
879 | * could change in length. */ | |
880 | if (!(usblp->device_id_string = kmalloc(USBLP_DEVICE_ID_SIZE, GFP_KERNEL))) { | |
881 | err("out of memory for device_id_string"); | |
882 | goto abort; | |
883 | } | |
884 | ||
885 | usblp->writebuf = usblp->readbuf = NULL; | |
886 | usblp->writeurb->transfer_flags = URB_NO_TRANSFER_DMA_MAP; | |
887 | usblp->readurb->transfer_flags = URB_NO_TRANSFER_DMA_MAP; | |
888 | /* Malloc write & read buffers. We somewhat wastefully | |
889 | * malloc both regardless of bidirectionality, because the | |
890 | * alternate setting can be changed later via an ioctl. */ | |
891 | if (!(usblp->writebuf = usb_buffer_alloc(dev, USBLP_BUF_SIZE, | |
892 | GFP_KERNEL, &usblp->writeurb->transfer_dma))) { | |
893 | err("out of memory for write buf"); | |
894 | goto abort; | |
895 | } | |
896 | if (!(usblp->readbuf = usb_buffer_alloc(dev, USBLP_BUF_SIZE, | |
897 | GFP_KERNEL, &usblp->readurb->transfer_dma))) { | |
898 | err("out of memory for read buf"); | |
899 | goto abort; | |
900 | } | |
901 | ||
902 | /* Allocate buffer for printer status */ | |
903 | usblp->statusbuf = kmalloc(STATUS_BUF_SIZE, GFP_KERNEL); | |
904 | if (!usblp->statusbuf) { | |
905 | err("out of memory for statusbuf"); | |
906 | goto abort; | |
907 | } | |
908 | ||
909 | /* Lookup quirks for this printer. */ | |
910 | usblp->quirks = usblp_quirks( | |
911 | le16_to_cpu(dev->descriptor.idVendor), | |
912 | le16_to_cpu(dev->descriptor.idProduct)); | |
913 | ||
914 | /* Analyze and pick initial alternate settings and endpoints. */ | |
915 | protocol = usblp_select_alts(usblp); | |
916 | if (protocol < 0) { | |
917 | dbg("incompatible printer-class device 0x%4.4X/0x%4.4X", | |
918 | le16_to_cpu(dev->descriptor.idVendor), | |
919 | le16_to_cpu(dev->descriptor.idProduct)); | |
920 | goto abort; | |
921 | } | |
922 | ||
923 | /* Setup the selected alternate setting and endpoints. */ | |
924 | if (usblp_set_protocol(usblp, protocol) < 0) | |
925 | goto abort; | |
926 | ||
927 | /* Retrieve and store the device ID string. */ | |
928 | usblp_cache_device_id_string(usblp); | |
a9714c84 | 929 | device_create_file(&intf->dev, &dev_attr_ieee1284_id); |
1da177e4 LT |
930 | |
931 | #ifdef DEBUG | |
932 | usblp_check_status(usblp, 0); | |
933 | #endif | |
934 | ||
1da177e4 LT |
935 | usb_set_intfdata (intf, usblp); |
936 | ||
937 | usblp->present = 1; | |
938 | ||
939 | retval = usb_register_dev(intf, &usblp_class); | |
940 | if (retval) { | |
941 | err("Not able to get a minor for this device."); | |
942 | goto abort_intfdata; | |
943 | } | |
944 | usblp->minor = intf->minor; | |
a9714c84 DW |
945 | info("usblp%d: USB %sdirectional printer dev %d " |
946 | "if %d alt %d proto %d vid 0x%4.4X pid 0x%4.4X", | |
947 | usblp->minor, usblp->bidir ? "Bi" : "Uni", dev->devnum, | |
948 | usblp->ifnum, | |
949 | usblp->protocol[usblp->current_protocol].alt_setting, | |
950 | usblp->current_protocol, | |
951 | le16_to_cpu(usblp->dev->descriptor.idVendor), | |
952 | le16_to_cpu(usblp->dev->descriptor.idProduct)); | |
1da177e4 LT |
953 | |
954 | return 0; | |
955 | ||
956 | abort_intfdata: | |
957 | usb_set_intfdata (intf, NULL); | |
a9714c84 | 958 | device_remove_file(&intf->dev, &dev_attr_ieee1284_id); |
1da177e4 LT |
959 | abort: |
960 | if (usblp) { | |
961 | if (usblp->writebuf) | |
962 | usb_buffer_free (usblp->dev, USBLP_BUF_SIZE, | |
963 | usblp->writebuf, usblp->writeurb->transfer_dma); | |
964 | if (usblp->readbuf) | |
965 | usb_buffer_free (usblp->dev, USBLP_BUF_SIZE, | |
966 | usblp->readbuf, usblp->writeurb->transfer_dma); | |
967 | kfree(usblp->statusbuf); | |
968 | kfree(usblp->device_id_string); | |
969 | usb_free_urb(usblp->writeurb); | |
970 | usb_free_urb(usblp->readurb); | |
971 | kfree(usblp); | |
972 | } | |
973 | return -EIO; | |
974 | } | |
975 | ||
976 | /* | |
977 | * We are a "new" style driver with usb_device_id table, | |
978 | * but our requirements are too intricate for simple match to handle. | |
979 | * | |
980 | * The "proto_bias" option may be used to specify the preferred protocol | |
981 | * for all USB printers (1=7/1/1, 2=7/1/2, 3=7/1/3). If the device | |
982 | * supports the preferred protocol, then we bind to it. | |
983 | * | |
984 | * The best interface for us is 7/1/2, because it is compatible | |
985 | * with a stream of characters. If we find it, we bind to it. | |
986 | * | |
987 | * Note that the people from hpoj.sourceforge.net need to be able to | |
988 | * bind to 7/1/3 (MLC/1284.4), so we provide them ioctls for this purpose. | |
989 | * | |
990 | * Failing 7/1/2, we look for 7/1/3, even though it's probably not | |
991 | * stream-compatible, because this matches the behaviour of the old code. | |
992 | * | |
993 | * If nothing else, we bind to 7/1/1 - the unidirectional interface. | |
994 | */ | |
995 | static int usblp_select_alts(struct usblp *usblp) | |
996 | { | |
997 | struct usb_interface *if_alt; | |
998 | struct usb_host_interface *ifd; | |
999 | struct usb_endpoint_descriptor *epd, *epwrite, *epread; | |
1000 | int p, i, e; | |
1001 | ||
1002 | if_alt = usblp->intf; | |
1003 | ||
1004 | for (p = 0; p < USBLP_MAX_PROTOCOLS; p++) | |
1005 | usblp->protocol[p].alt_setting = -1; | |
1006 | ||
1007 | /* Find out what we have. */ | |
1008 | for (i = 0; i < if_alt->num_altsetting; i++) { | |
1009 | ifd = &if_alt->altsetting[i]; | |
1010 | ||
1011 | if (ifd->desc.bInterfaceClass != 7 || ifd->desc.bInterfaceSubClass != 1) | |
1012 | continue; | |
1013 | ||
1014 | if (ifd->desc.bInterfaceProtocol < USBLP_FIRST_PROTOCOL || | |
1015 | ifd->desc.bInterfaceProtocol > USBLP_LAST_PROTOCOL) | |
1016 | continue; | |
1017 | ||
1018 | /* Look for bulk OUT and IN endpoints. */ | |
1019 | epwrite = epread = NULL; | |
1020 | for (e = 0; e < ifd->desc.bNumEndpoints; e++) { | |
1021 | epd = &ifd->endpoint[e].desc; | |
1022 | ||
1023 | if ((epd->bmAttributes&USB_ENDPOINT_XFERTYPE_MASK)!= | |
1024 | USB_ENDPOINT_XFER_BULK) | |
1025 | continue; | |
1026 | ||
1027 | if (!(epd->bEndpointAddress & USB_ENDPOINT_DIR_MASK)) { | |
1028 | if (!epwrite) | |
1029 | epwrite = epd; | |
1030 | ||
1031 | } else { | |
1032 | if (!epread) | |
1033 | epread = epd; | |
1034 | } | |
1035 | } | |
1036 | ||
1037 | /* Ignore buggy hardware without the right endpoints. */ | |
1038 | if (!epwrite || (ifd->desc.bInterfaceProtocol > 1 && !epread)) | |
1039 | continue; | |
1040 | ||
1041 | /* Turn off reads for 7/1/1 (unidirectional) interfaces | |
1042 | * and buggy bidirectional printers. */ | |
1043 | if (ifd->desc.bInterfaceProtocol == 1) { | |
1044 | epread = NULL; | |
1045 | } else if (usblp->quirks & USBLP_QUIRK_BIDIR) { | |
1046 | info("Disabling reads from problem bidirectional " | |
1047 | "printer on usblp%d", usblp->minor); | |
1048 | epread = NULL; | |
1049 | } | |
1050 | ||
1051 | usblp->protocol[ifd->desc.bInterfaceProtocol].alt_setting = | |
1052 | ifd->desc.bAlternateSetting; | |
1053 | usblp->protocol[ifd->desc.bInterfaceProtocol].epwrite = epwrite; | |
1054 | usblp->protocol[ifd->desc.bInterfaceProtocol].epread = epread; | |
1055 | } | |
1056 | ||
1057 | /* If our requested protocol is supported, then use it. */ | |
1058 | if (proto_bias >= USBLP_FIRST_PROTOCOL && | |
1059 | proto_bias <= USBLP_LAST_PROTOCOL && | |
1060 | usblp->protocol[proto_bias].alt_setting != -1) | |
1061 | return proto_bias; | |
1062 | ||
1063 | /* Ordering is important here. */ | |
1064 | if (usblp->protocol[2].alt_setting != -1) | |
1065 | return 2; | |
1066 | if (usblp->protocol[1].alt_setting != -1) | |
1067 | return 1; | |
1068 | if (usblp->protocol[3].alt_setting != -1) | |
1069 | return 3; | |
1070 | ||
1071 | /* If nothing is available, then don't bind to this device. */ | |
1072 | return -1; | |
1073 | } | |
1074 | ||
1075 | static int usblp_set_protocol(struct usblp *usblp, int protocol) | |
1076 | { | |
1077 | int r, alts; | |
1078 | ||
1079 | if (protocol < USBLP_FIRST_PROTOCOL || protocol > USBLP_LAST_PROTOCOL) | |
1080 | return -EINVAL; | |
1081 | ||
1082 | alts = usblp->protocol[protocol].alt_setting; | |
1083 | if (alts < 0) | |
1084 | return -EINVAL; | |
1085 | r = usb_set_interface(usblp->dev, usblp->ifnum, alts); | |
1086 | if (r < 0) { | |
1087 | err("can't set desired altsetting %d on interface %d", | |
1088 | alts, usblp->ifnum); | |
1089 | return r; | |
1090 | } | |
1091 | ||
1092 | usb_fill_bulk_urb(usblp->writeurb, usblp->dev, | |
1093 | usb_sndbulkpipe(usblp->dev, | |
1094 | usblp->protocol[protocol].epwrite->bEndpointAddress), | |
1095 | usblp->writebuf, 0, | |
1096 | usblp_bulk_write, usblp); | |
1097 | ||
1098 | usblp->bidir = (usblp->protocol[protocol].epread != NULL); | |
1099 | if (usblp->bidir) | |
1100 | usb_fill_bulk_urb(usblp->readurb, usblp->dev, | |
1101 | usb_rcvbulkpipe(usblp->dev, | |
1102 | usblp->protocol[protocol].epread->bEndpointAddress), | |
1103 | usblp->readbuf, USBLP_BUF_SIZE, | |
1104 | usblp_bulk_read, usblp); | |
1105 | ||
1106 | usblp->current_protocol = protocol; | |
1107 | dbg("usblp%d set protocol %d", usblp->minor, protocol); | |
1108 | return 0; | |
1109 | } | |
1110 | ||
1111 | /* Retrieves and caches device ID string. | |
1112 | * Returns length, including length bytes but not null terminator. | |
1113 | * On error, returns a negative errno value. */ | |
1114 | static int usblp_cache_device_id_string(struct usblp *usblp) | |
1115 | { | |
1116 | int err, length; | |
1117 | ||
1118 | err = usblp_get_id(usblp, 0, usblp->device_id_string, USBLP_DEVICE_ID_SIZE - 1); | |
1119 | if (err < 0) { | |
1120 | dbg("usblp%d: error = %d reading IEEE-1284 Device ID string", | |
1121 | usblp->minor, err); | |
1122 | usblp->device_id_string[0] = usblp->device_id_string[1] = '\0'; | |
1123 | return -EIO; | |
1124 | } | |
1125 | ||
1126 | /* First two bytes are length in big-endian. | |
1127 | * They count themselves, and we copy them into | |
1128 | * the user's buffer. */ | |
1129 | length = be16_to_cpu(*((__be16 *)usblp->device_id_string)); | |
1130 | if (length < 2) | |
1131 | length = 2; | |
1132 | else if (length >= USBLP_DEVICE_ID_SIZE) | |
1133 | length = USBLP_DEVICE_ID_SIZE - 1; | |
1134 | usblp->device_id_string[length] = '\0'; | |
1135 | ||
1136 | dbg("usblp%d Device ID string [len=%d]=\"%s\"", | |
1137 | usblp->minor, length, &usblp->device_id_string[2]); | |
1138 | ||
1139 | return length; | |
1140 | } | |
1141 | ||
1142 | static void usblp_disconnect(struct usb_interface *intf) | |
1143 | { | |
1144 | struct usblp *usblp = usb_get_intfdata (intf); | |
1145 | ||
1146 | usb_deregister_dev(intf, &usblp_class); | |
1147 | ||
1148 | if (!usblp || !usblp->dev) { | |
1149 | err("bogus disconnect"); | |
1150 | BUG (); | |
1151 | } | |
1152 | ||
a9714c84 DW |
1153 | device_remove_file(&intf->dev, &dev_attr_ieee1284_id); |
1154 | ||
1da177e4 LT |
1155 | down (&usblp_sem); |
1156 | down (&usblp->sem); | |
1157 | usblp->present = 0; | |
1158 | usb_set_intfdata (intf, NULL); | |
1159 | ||
1160 | usblp_unlink_urbs(usblp); | |
1161 | usb_buffer_free (usblp->dev, USBLP_BUF_SIZE, | |
1162 | usblp->writebuf, usblp->writeurb->transfer_dma); | |
1163 | usb_buffer_free (usblp->dev, USBLP_BUF_SIZE, | |
1164 | usblp->readbuf, usblp->readurb->transfer_dma); | |
1165 | up (&usblp->sem); | |
1166 | ||
1167 | if (!usblp->used) | |
1168 | usblp_cleanup (usblp); | |
1169 | up (&usblp_sem); | |
1170 | } | |
1171 | ||
1172 | static struct usb_device_id usblp_ids [] = { | |
1173 | { USB_DEVICE_INFO(7, 1, 1) }, | |
1174 | { USB_DEVICE_INFO(7, 1, 2) }, | |
1175 | { USB_DEVICE_INFO(7, 1, 3) }, | |
1176 | { USB_INTERFACE_INFO(7, 1, 1) }, | |
1177 | { USB_INTERFACE_INFO(7, 1, 2) }, | |
1178 | { USB_INTERFACE_INFO(7, 1, 3) }, | |
1179 | { } /* Terminating entry */ | |
1180 | }; | |
1181 | ||
1182 | MODULE_DEVICE_TABLE (usb, usblp_ids); | |
1183 | ||
1184 | static struct usb_driver usblp_driver = { | |
1da177e4 LT |
1185 | .name = "usblp", |
1186 | .probe = usblp_probe, | |
1187 | .disconnect = usblp_disconnect, | |
1188 | .id_table = usblp_ids, | |
1189 | }; | |
1190 | ||
1191 | static int __init usblp_init(void) | |
1192 | { | |
1193 | int retval; | |
1194 | retval = usb_register(&usblp_driver); | |
8e695cdb ON |
1195 | if (!retval) |
1196 | info(DRIVER_VERSION ": " DRIVER_DESC); | |
1197 | ||
1da177e4 LT |
1198 | return retval; |
1199 | } | |
1200 | ||
1201 | static void __exit usblp_exit(void) | |
1202 | { | |
1203 | usb_deregister(&usblp_driver); | |
1204 | } | |
1205 | ||
1206 | module_init(usblp_init); | |
1207 | module_exit(usblp_exit); | |
1208 | ||
1209 | MODULE_AUTHOR( DRIVER_AUTHOR ); | |
1210 | MODULE_DESCRIPTION( DRIVER_DESC ); | |
1211 | module_param(proto_bias, int, S_IRUGO | S_IWUSR); | |
1212 | MODULE_PARM_DESC(proto_bias, "Favourite protocol number"); | |
1213 | MODULE_LICENSE("GPL"); |