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> | |
4186ecf8 | 58 | #include <linux/mutex.h> |
1da177e4 LT |
59 | #undef DEBUG |
60 | #include <linux/usb.h> | |
61 | ||
62 | /* | |
63 | * Version Information | |
64 | */ | |
65 | #define DRIVER_VERSION "v0.13" | |
66 | #define DRIVER_AUTHOR "Michael Gee, Pavel Machek, Vojtech Pavlik, Randy Dunlap, Pete Zaitcev, David Paschal" | |
67 | #define DRIVER_DESC "USB Printer Device Class driver" | |
68 | ||
69 | #define USBLP_BUF_SIZE 8192 | |
70 | #define USBLP_DEVICE_ID_SIZE 1024 | |
71 | ||
72 | /* ioctls: */ | |
73 | #define LPGETSTATUS 0x060b /* same as in drivers/char/lp.c */ | |
74 | #define IOCNR_GET_DEVICE_ID 1 | |
75 | #define IOCNR_GET_PROTOCOLS 2 | |
76 | #define IOCNR_SET_PROTOCOL 3 | |
77 | #define IOCNR_HP_SET_CHANNEL 4 | |
78 | #define IOCNR_GET_BUS_ADDRESS 5 | |
79 | #define IOCNR_GET_VID_PID 6 | |
80 | #define IOCNR_SOFT_RESET 7 | |
81 | /* Get device_id string: */ | |
82 | #define LPIOC_GET_DEVICE_ID(len) _IOC(_IOC_READ, 'P', IOCNR_GET_DEVICE_ID, len) | |
83 | /* The following ioctls were added for http://hpoj.sourceforge.net: */ | |
84 | /* Get two-int array: | |
85 | * [0]=current protocol (1=7/1/1, 2=7/1/2, 3=7/1/3), | |
86 | * [1]=supported protocol mask (mask&(1<<n)!=0 means 7/1/n supported): */ | |
87 | #define LPIOC_GET_PROTOCOLS(len) _IOC(_IOC_READ, 'P', IOCNR_GET_PROTOCOLS, len) | |
88 | /* Set protocol (arg: 1=7/1/1, 2=7/1/2, 3=7/1/3): */ | |
89 | #define LPIOC_SET_PROTOCOL _IOC(_IOC_WRITE, 'P', IOCNR_SET_PROTOCOL, 0) | |
90 | /* Set channel number (HP Vendor-specific command): */ | |
91 | #define LPIOC_HP_SET_CHANNEL _IOC(_IOC_WRITE, 'P', IOCNR_HP_SET_CHANNEL, 0) | |
92 | /* Get two-int array: [0]=bus number, [1]=device address: */ | |
93 | #define LPIOC_GET_BUS_ADDRESS(len) _IOC(_IOC_READ, 'P', IOCNR_GET_BUS_ADDRESS, len) | |
94 | /* Get two-int array: [0]=vendor ID, [1]=product ID: */ | |
95 | #define LPIOC_GET_VID_PID(len) _IOC(_IOC_READ, 'P', IOCNR_GET_VID_PID, len) | |
96 | /* Perform class specific soft reset */ | |
97 | #define LPIOC_SOFT_RESET _IOC(_IOC_NONE, 'P', IOCNR_SOFT_RESET, 0); | |
98 | ||
99 | /* | |
100 | * A DEVICE_ID string may include the printer's serial number. | |
101 | * It should end with a semi-colon (';'). | |
102 | * An example from an HP 970C DeskJet printer is (this is one long string, | |
103 | * with the serial number changed): | |
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: ; | |
105 | */ | |
106 | ||
107 | /* | |
108 | * USB Printer Requests | |
109 | */ | |
110 | ||
111 | #define USBLP_REQ_GET_ID 0x00 | |
112 | #define USBLP_REQ_GET_STATUS 0x01 | |
113 | #define USBLP_REQ_RESET 0x02 | |
114 | #define USBLP_REQ_HP_CHANNEL_CHANGE_REQUEST 0x00 /* HP Vendor-specific */ | |
115 | ||
116 | #define USBLP_MINORS 16 | |
117 | #define USBLP_MINOR_BASE 0 | |
118 | ||
119 | #define USBLP_WRITE_TIMEOUT (5000) /* 5 seconds */ | |
120 | ||
121 | #define USBLP_FIRST_PROTOCOL 1 | |
122 | #define USBLP_LAST_PROTOCOL 3 | |
123 | #define USBLP_MAX_PROTOCOLS (USBLP_LAST_PROTOCOL+1) | |
124 | ||
125 | /* | |
126 | * some arbitrary status buffer size; | |
127 | * need a status buffer that is allocated via kmalloc(), not on stack | |
128 | */ | |
129 | #define STATUS_BUF_SIZE 8 | |
130 | ||
131 | struct usblp { | |
132 | struct usb_device *dev; /* USB device */ | |
133 | struct semaphore sem; /* locks this struct, especially "dev" */ | |
134 | char *writebuf; /* write transfer_buffer */ | |
135 | char *readbuf; /* read transfer_buffer */ | |
136 | char *statusbuf; /* status transfer_buffer */ | |
137 | struct urb *readurb, *writeurb; /* The urbs */ | |
138 | wait_queue_head_t wait; /* Zzzzz ... */ | |
139 | int readcount; /* Counter for reads */ | |
140 | int ifnum; /* Interface number */ | |
141 | struct usb_interface *intf; /* The interface */ | |
142 | /* Alternate-setting numbers and endpoints for each protocol | |
143 | * (7/1/{index=1,2,3}) that the device supports: */ | |
144 | struct { | |
145 | int alt_setting; | |
146 | struct usb_endpoint_descriptor *epwrite; | |
147 | struct usb_endpoint_descriptor *epread; | |
148 | } protocol[USBLP_MAX_PROTOCOLS]; | |
149 | int current_protocol; | |
150 | int minor; /* minor number of device */ | |
151 | int wcomplete; /* writing is completed */ | |
152 | int rcomplete; /* reading is completed */ | |
153 | unsigned int quirks; /* quirks flags */ | |
154 | unsigned char used; /* True if open */ | |
155 | unsigned char present; /* True if not disconnected */ | |
156 | unsigned char bidir; /* interface is bidirectional */ | |
157 | unsigned char *device_id_string; /* IEEE 1284 DEVICE ID string (ptr) */ | |
158 | /* first 2 bytes are (big-endian) length */ | |
159 | }; | |
160 | ||
161 | #ifdef DEBUG | |
162 | static void usblp_dump(struct usblp *usblp) { | |
163 | int p; | |
164 | ||
165 | dbg("usblp=0x%p", usblp); | |
166 | dbg("dev=0x%p", usblp->dev); | |
167 | dbg("present=%d", usblp->present); | |
168 | dbg("readbuf=0x%p", usblp->readbuf); | |
169 | dbg("writebuf=0x%p", usblp->writebuf); | |
170 | dbg("readurb=0x%p", usblp->readurb); | |
171 | dbg("writeurb=0x%p", usblp->writeurb); | |
172 | dbg("readcount=%d", usblp->readcount); | |
173 | dbg("ifnum=%d", usblp->ifnum); | |
174 | for (p = USBLP_FIRST_PROTOCOL; p <= USBLP_LAST_PROTOCOL; p++) { | |
175 | dbg("protocol[%d].alt_setting=%d", p, usblp->protocol[p].alt_setting); | |
176 | dbg("protocol[%d].epwrite=%p", p, usblp->protocol[p].epwrite); | |
177 | dbg("protocol[%d].epread=%p", p, usblp->protocol[p].epread); | |
178 | } | |
179 | dbg("current_protocol=%d", usblp->current_protocol); | |
180 | dbg("minor=%d", usblp->minor); | |
181 | dbg("wcomplete=%d", usblp->wcomplete); | |
182 | dbg("rcomplete=%d", usblp->rcomplete); | |
183 | dbg("quirks=%d", usblp->quirks); | |
184 | dbg("used=%d", usblp->used); | |
185 | dbg("bidir=%d", usblp->bidir); | |
186 | dbg("device_id_string=\"%s\"", | |
187 | usblp->device_id_string ? | |
188 | usblp->device_id_string + 2 : | |
189 | (unsigned char *)"(null)"); | |
190 | } | |
191 | #endif | |
192 | ||
193 | /* Quirks: various printer quirks are handled by this table & its flags. */ | |
194 | ||
195 | struct quirk_printer_struct { | |
196 | __u16 vendorId; | |
197 | __u16 productId; | |
198 | unsigned int quirks; | |
199 | }; | |
200 | ||
201 | #define USBLP_QUIRK_BIDIR 0x1 /* reports bidir but requires unidirectional mode (no INs/reads) */ | |
202 | #define USBLP_QUIRK_USB_INIT 0x2 /* needs vendor USB init string */ | |
203 | ||
4c4c9432 | 204 | static const struct quirk_printer_struct quirk_printers[] = { |
1da177e4 LT |
205 | { 0x03f0, 0x0004, USBLP_QUIRK_BIDIR }, /* HP DeskJet 895C */ |
206 | { 0x03f0, 0x0104, USBLP_QUIRK_BIDIR }, /* HP DeskJet 880C */ | |
207 | { 0x03f0, 0x0204, USBLP_QUIRK_BIDIR }, /* HP DeskJet 815C */ | |
208 | { 0x03f0, 0x0304, USBLP_QUIRK_BIDIR }, /* HP DeskJet 810C/812C */ | |
209 | { 0x03f0, 0x0404, USBLP_QUIRK_BIDIR }, /* HP DeskJet 830C */ | |
210 | { 0x03f0, 0x0504, USBLP_QUIRK_BIDIR }, /* HP DeskJet 885C */ | |
211 | { 0x03f0, 0x0604, USBLP_QUIRK_BIDIR }, /* HP DeskJet 840C */ | |
212 | { 0x03f0, 0x0804, USBLP_QUIRK_BIDIR }, /* HP DeskJet 816C */ | |
213 | { 0x03f0, 0x1104, USBLP_QUIRK_BIDIR }, /* HP Deskjet 959C */ | |
214 | { 0x0409, 0xefbe, USBLP_QUIRK_BIDIR }, /* NEC Picty900 (HP OEM) */ | |
215 | { 0x0409, 0xbef4, USBLP_QUIRK_BIDIR }, /* NEC Picty760 (HP OEM) */ | |
216 | { 0x0409, 0xf0be, USBLP_QUIRK_BIDIR }, /* NEC Picty920 (HP OEM) */ | |
217 | { 0x0409, 0xf1be, USBLP_QUIRK_BIDIR }, /* NEC Picty800 (HP OEM) */ | |
218 | { 0, 0 } | |
219 | }; | |
220 | ||
221 | static int usblp_select_alts(struct usblp *usblp); | |
222 | static int usblp_set_protocol(struct usblp *usblp, int protocol); | |
223 | static int usblp_cache_device_id_string(struct usblp *usblp); | |
224 | ||
225 | /* forward reference to make our lives easier */ | |
226 | static struct usb_driver usblp_driver; | |
4186ecf8 | 227 | static DEFINE_MUTEX(usblp_mutex); /* locks the existence of usblp's */ |
1da177e4 LT |
228 | |
229 | /* | |
230 | * Functions for usblp control messages. | |
231 | */ | |
232 | ||
233 | static int usblp_ctrl_msg(struct usblp *usblp, int request, int type, int dir, int recip, int value, void *buf, int len) | |
234 | { | |
235 | int retval; | |
236 | int index = usblp->ifnum; | |
237 | ||
238 | /* High byte has the interface index. | |
239 | Low byte has the alternate setting. | |
240 | */ | |
241 | if ((request == USBLP_REQ_GET_ID) && (type == USB_TYPE_CLASS)) { | |
242 | index = (usblp->ifnum<<8)|usblp->protocol[usblp->current_protocol].alt_setting; | |
243 | } | |
244 | ||
245 | retval = usb_control_msg(usblp->dev, | |
246 | dir ? usb_rcvctrlpipe(usblp->dev, 0) : usb_sndctrlpipe(usblp->dev, 0), | |
247 | request, type | dir | recip, value, index, buf, len, USBLP_WRITE_TIMEOUT); | |
248 | dbg("usblp_control_msg: rq: 0x%02x dir: %d recip: %d value: %d idx: %d len: %#x result: %d", | |
249 | request, !!dir, recip, value, index, len, retval); | |
250 | return retval < 0 ? retval : 0; | |
251 | } | |
252 | ||
253 | #define usblp_read_status(usblp, status)\ | |
254 | usblp_ctrl_msg(usblp, USBLP_REQ_GET_STATUS, USB_TYPE_CLASS, USB_DIR_IN, USB_RECIP_INTERFACE, 0, status, 1) | |
255 | #define usblp_get_id(usblp, config, id, maxlen)\ | |
256 | usblp_ctrl_msg(usblp, USBLP_REQ_GET_ID, USB_TYPE_CLASS, USB_DIR_IN, USB_RECIP_INTERFACE, config, id, maxlen) | |
257 | #define usblp_reset(usblp)\ | |
258 | usblp_ctrl_msg(usblp, USBLP_REQ_RESET, USB_TYPE_CLASS, USB_DIR_OUT, USB_RECIP_OTHER, 0, NULL, 0) | |
259 | ||
260 | #define usblp_hp_channel_change_request(usblp, channel, buffer) \ | |
261 | usblp_ctrl_msg(usblp, USBLP_REQ_HP_CHANNEL_CHANGE_REQUEST, USB_TYPE_VENDOR, USB_DIR_IN, USB_RECIP_INTERFACE, channel, buffer, 1) | |
262 | ||
263 | /* | |
264 | * See the description for usblp_select_alts() below for the usage | |
265 | * explanation. Look into your /proc/bus/usb/devices and dmesg in | |
266 | * case of any trouble. | |
267 | */ | |
268 | static int proto_bias = -1; | |
269 | ||
270 | /* | |
271 | * URB callback. | |
272 | */ | |
273 | ||
274 | static void usblp_bulk_read(struct urb *urb, struct pt_regs *regs) | |
275 | { | |
276 | struct usblp *usblp = urb->context; | |
277 | ||
8e695cdb | 278 | if (unlikely(!usblp || !usblp->dev || !usblp->used)) |
1da177e4 LT |
279 | return; |
280 | ||
8e695cdb ON |
281 | if (unlikely(!usblp->present)) |
282 | goto unplug; | |
1da177e4 LT |
283 | if (unlikely(urb->status)) |
284 | warn("usblp%d: nonzero read/write bulk status received: %d", | |
285 | usblp->minor, urb->status); | |
286 | usblp->rcomplete = 1; | |
8e695cdb | 287 | unplug: |
1da177e4 LT |
288 | wake_up_interruptible(&usblp->wait); |
289 | } | |
290 | ||
291 | static void usblp_bulk_write(struct urb *urb, struct pt_regs *regs) | |
292 | { | |
293 | struct usblp *usblp = urb->context; | |
294 | ||
8e695cdb | 295 | if (unlikely(!usblp || !usblp->dev || !usblp->used)) |
1da177e4 | 296 | return; |
8e695cdb ON |
297 | if (unlikely(!usblp->present)) |
298 | goto unplug; | |
1da177e4 LT |
299 | if (unlikely(urb->status)) |
300 | warn("usblp%d: nonzero read/write bulk status received: %d", | |
301 | usblp->minor, urb->status); | |
302 | usblp->wcomplete = 1; | |
8e695cdb | 303 | unplug: |
1da177e4 LT |
304 | wake_up_interruptible(&usblp->wait); |
305 | } | |
306 | ||
307 | /* | |
308 | * Get and print printer errors. | |
309 | */ | |
310 | ||
4c4c9432 | 311 | static const char *usblp_messages[] = { "ok", "out of paper", "off-line", "on fire" }; |
1da177e4 LT |
312 | |
313 | static int usblp_check_status(struct usblp *usblp, int err) | |
314 | { | |
315 | unsigned char status, newerr = 0; | |
316 | int error; | |
317 | ||
318 | error = usblp_read_status (usblp, usblp->statusbuf); | |
319 | if (error < 0) { | |
0bc8e009 RD |
320 | if (printk_ratelimit()) |
321 | err("usblp%d: error %d reading printer status", | |
322 | usblp->minor, error); | |
1da177e4 LT |
323 | return 0; |
324 | } | |
325 | ||
326 | status = *usblp->statusbuf; | |
327 | ||
328 | if (~status & LP_PERRORP) | |
329 | newerr = 3; | |
330 | if (status & LP_POUTPA) | |
331 | newerr = 1; | |
332 | if (~status & LP_PSELECD) | |
333 | newerr = 2; | |
334 | ||
335 | if (newerr != err) | |
336 | info("usblp%d: %s", usblp->minor, usblp_messages[newerr]); | |
337 | ||
338 | return newerr; | |
339 | } | |
340 | ||
341 | /* | |
342 | * File op functions. | |
343 | */ | |
344 | ||
345 | static int usblp_open(struct inode *inode, struct file *file) | |
346 | { | |
347 | int minor = iminor(inode); | |
348 | struct usblp *usblp; | |
349 | struct usb_interface *intf; | |
350 | int retval; | |
351 | ||
352 | if (minor < 0) | |
353 | return -ENODEV; | |
354 | ||
4186ecf8 | 355 | mutex_lock (&usblp_mutex); |
1da177e4 LT |
356 | |
357 | retval = -ENODEV; | |
358 | intf = usb_find_interface(&usblp_driver, minor); | |
359 | if (!intf) { | |
360 | goto out; | |
361 | } | |
362 | usblp = usb_get_intfdata (intf); | |
363 | if (!usblp || !usblp->dev || !usblp->present) | |
364 | goto out; | |
365 | ||
366 | retval = -EBUSY; | |
367 | if (usblp->used) | |
368 | goto out; | |
369 | ||
370 | /* | |
371 | * TODO: need to implement LP_ABORTOPEN + O_NONBLOCK as in drivers/char/lp.c ??? | |
372 | * This is #if 0-ed because we *don't* want to fail an open | |
373 | * just because the printer is off-line. | |
374 | */ | |
375 | #if 0 | |
376 | if ((retval = usblp_check_status(usblp, 0))) { | |
377 | retval = retval > 1 ? -EIO : -ENOSPC; | |
378 | goto out; | |
379 | } | |
380 | #else | |
381 | retval = 0; | |
382 | #endif | |
383 | ||
384 | usblp->used = 1; | |
385 | file->private_data = usblp; | |
386 | ||
387 | usblp->writeurb->transfer_buffer_length = 0; | |
388 | usblp->wcomplete = 1; /* we begin writeable */ | |
389 | usblp->rcomplete = 0; | |
2c45b6fe AO |
390 | usblp->writeurb->status = 0; |
391 | usblp->readurb->status = 0; | |
1da177e4 LT |
392 | |
393 | if (usblp->bidir) { | |
394 | usblp->readcount = 0; | |
395 | usblp->readurb->dev = usblp->dev; | |
396 | if (usb_submit_urb(usblp->readurb, GFP_KERNEL) < 0) { | |
397 | retval = -EIO; | |
398 | usblp->used = 0; | |
399 | file->private_data = NULL; | |
400 | } | |
401 | } | |
402 | out: | |
4186ecf8 | 403 | mutex_unlock (&usblp_mutex); |
1da177e4 LT |
404 | return retval; |
405 | } | |
406 | ||
407 | static void usblp_cleanup (struct usblp *usblp) | |
408 | { | |
409 | info("usblp%d: removed", usblp->minor); | |
410 | ||
411 | kfree (usblp->device_id_string); | |
412 | kfree (usblp->statusbuf); | |
413 | usb_free_urb(usblp->writeurb); | |
414 | usb_free_urb(usblp->readurb); | |
415 | kfree (usblp); | |
416 | } | |
417 | ||
418 | static void usblp_unlink_urbs(struct usblp *usblp) | |
419 | { | |
420 | usb_kill_urb(usblp->writeurb); | |
421 | if (usblp->bidir) | |
422 | usb_kill_urb(usblp->readurb); | |
423 | } | |
424 | ||
425 | static int usblp_release(struct inode *inode, struct file *file) | |
426 | { | |
427 | struct usblp *usblp = file->private_data; | |
428 | ||
4186ecf8 | 429 | mutex_lock (&usblp_mutex); |
1da177e4 LT |
430 | usblp->used = 0; |
431 | if (usblp->present) { | |
432 | usblp_unlink_urbs(usblp); | |
433 | } else /* finish cleanup from disconnect */ | |
434 | usblp_cleanup (usblp); | |
4186ecf8 | 435 | mutex_unlock (&usblp_mutex); |
1da177e4 LT |
436 | return 0; |
437 | } | |
438 | ||
439 | /* No kernel lock - fine */ | |
440 | static unsigned int usblp_poll(struct file *file, struct poll_table_struct *wait) | |
441 | { | |
442 | struct usblp *usblp = file->private_data; | |
443 | poll_wait(file, &usblp->wait, wait); | |
444 | return ((!usblp->bidir || !usblp->rcomplete) ? 0 : POLLIN | POLLRDNORM) | |
445 | | (!usblp->wcomplete ? 0 : POLLOUT | POLLWRNORM); | |
446 | } | |
447 | ||
318e479e | 448 | static long usblp_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
1da177e4 LT |
449 | { |
450 | struct usblp *usblp = file->private_data; | |
451 | int length, err, i; | |
452 | unsigned char newChannel; | |
453 | int status; | |
454 | int twoints[2]; | |
455 | int retval = 0; | |
456 | ||
457 | down (&usblp->sem); | |
458 | if (!usblp->present) { | |
459 | retval = -ENODEV; | |
460 | goto done; | |
461 | } | |
462 | ||
463 | dbg("usblp_ioctl: cmd=0x%x (%c nr=%d len=%d dir=%d)", cmd, _IOC_TYPE(cmd), | |
464 | _IOC_NR(cmd), _IOC_SIZE(cmd), _IOC_DIR(cmd) ); | |
465 | ||
466 | if (_IOC_TYPE(cmd) == 'P') /* new-style ioctl number */ | |
467 | ||
468 | switch (_IOC_NR(cmd)) { | |
469 | ||
470 | case IOCNR_GET_DEVICE_ID: /* get the DEVICE_ID string */ | |
471 | if (_IOC_DIR(cmd) != _IOC_READ) { | |
472 | retval = -EINVAL; | |
473 | goto done; | |
474 | } | |
475 | ||
476 | length = usblp_cache_device_id_string(usblp); | |
477 | if (length < 0) { | |
478 | retval = length; | |
479 | goto done; | |
480 | } | |
481 | if (length > _IOC_SIZE(cmd)) | |
482 | length = _IOC_SIZE(cmd); /* truncate */ | |
483 | ||
484 | if (copy_to_user((void __user *) arg, | |
485 | usblp->device_id_string, | |
486 | (unsigned long) length)) { | |
487 | retval = -EFAULT; | |
488 | goto done; | |
489 | } | |
490 | ||
491 | break; | |
492 | ||
493 | case IOCNR_GET_PROTOCOLS: | |
494 | if (_IOC_DIR(cmd) != _IOC_READ || | |
495 | _IOC_SIZE(cmd) < sizeof(twoints)) { | |
496 | retval = -EINVAL; | |
497 | goto done; | |
498 | } | |
499 | ||
500 | twoints[0] = usblp->current_protocol; | |
501 | twoints[1] = 0; | |
502 | for (i = USBLP_FIRST_PROTOCOL; | |
503 | i <= USBLP_LAST_PROTOCOL; i++) { | |
504 | if (usblp->protocol[i].alt_setting >= 0) | |
505 | twoints[1] |= (1<<i); | |
506 | } | |
507 | ||
508 | if (copy_to_user((void __user *)arg, | |
509 | (unsigned char *)twoints, | |
510 | sizeof(twoints))) { | |
511 | retval = -EFAULT; | |
512 | goto done; | |
513 | } | |
514 | ||
515 | break; | |
516 | ||
517 | case IOCNR_SET_PROTOCOL: | |
518 | if (_IOC_DIR(cmd) != _IOC_WRITE) { | |
519 | retval = -EINVAL; | |
520 | goto done; | |
521 | } | |
522 | ||
523 | #ifdef DEBUG | |
524 | if (arg == -10) { | |
525 | usblp_dump(usblp); | |
526 | break; | |
527 | } | |
528 | #endif | |
529 | ||
530 | usblp_unlink_urbs(usblp); | |
531 | retval = usblp_set_protocol(usblp, arg); | |
532 | if (retval < 0) { | |
533 | usblp_set_protocol(usblp, | |
534 | usblp->current_protocol); | |
535 | } | |
536 | break; | |
537 | ||
538 | case IOCNR_HP_SET_CHANNEL: | |
539 | if (_IOC_DIR(cmd) != _IOC_WRITE || | |
540 | le16_to_cpu(usblp->dev->descriptor.idVendor) != 0x03F0 || | |
541 | usblp->quirks & USBLP_QUIRK_BIDIR) { | |
542 | retval = -EINVAL; | |
543 | goto done; | |
544 | } | |
545 | ||
546 | err = usblp_hp_channel_change_request(usblp, | |
547 | arg, &newChannel); | |
548 | if (err < 0) { | |
549 | err("usblp%d: error = %d setting " | |
550 | "HP channel", | |
551 | usblp->minor, err); | |
552 | retval = -EIO; | |
553 | goto done; | |
554 | } | |
555 | ||
556 | dbg("usblp%d requested/got HP channel %ld/%d", | |
557 | usblp->minor, arg, newChannel); | |
558 | break; | |
559 | ||
560 | case IOCNR_GET_BUS_ADDRESS: | |
561 | if (_IOC_DIR(cmd) != _IOC_READ || | |
562 | _IOC_SIZE(cmd) < sizeof(twoints)) { | |
563 | retval = -EINVAL; | |
564 | goto done; | |
565 | } | |
566 | ||
567 | twoints[0] = usblp->dev->bus->busnum; | |
568 | twoints[1] = usblp->dev->devnum; | |
569 | if (copy_to_user((void __user *)arg, | |
570 | (unsigned char *)twoints, | |
571 | sizeof(twoints))) { | |
572 | retval = -EFAULT; | |
573 | goto done; | |
574 | } | |
575 | ||
576 | dbg("usblp%d is bus=%d, device=%d", | |
577 | usblp->minor, twoints[0], twoints[1]); | |
578 | break; | |
579 | ||
580 | case IOCNR_GET_VID_PID: | |
581 | if (_IOC_DIR(cmd) != _IOC_READ || | |
582 | _IOC_SIZE(cmd) < sizeof(twoints)) { | |
583 | retval = -EINVAL; | |
584 | goto done; | |
585 | } | |
586 | ||
587 | twoints[0] = le16_to_cpu(usblp->dev->descriptor.idVendor); | |
588 | twoints[1] = le16_to_cpu(usblp->dev->descriptor.idProduct); | |
589 | if (copy_to_user((void __user *)arg, | |
590 | (unsigned char *)twoints, | |
591 | sizeof(twoints))) { | |
592 | retval = -EFAULT; | |
593 | goto done; | |
594 | } | |
595 | ||
596 | dbg("usblp%d is VID=0x%4.4X, PID=0x%4.4X", | |
597 | usblp->minor, twoints[0], twoints[1]); | |
598 | break; | |
599 | ||
600 | case IOCNR_SOFT_RESET: | |
601 | if (_IOC_DIR(cmd) != _IOC_NONE) { | |
602 | retval = -EINVAL; | |
603 | goto done; | |
604 | } | |
605 | retval = usblp_reset(usblp); | |
606 | break; | |
607 | default: | |
608 | retval = -ENOTTY; | |
609 | } | |
610 | else /* old-style ioctl value */ | |
611 | switch (cmd) { | |
612 | ||
613 | case LPGETSTATUS: | |
614 | if (usblp_read_status(usblp, usblp->statusbuf)) { | |
0bc8e009 RD |
615 | if (printk_ratelimit()) |
616 | err("usblp%d: failed reading printer status", | |
617 | usblp->minor); | |
1da177e4 LT |
618 | retval = -EIO; |
619 | goto done; | |
620 | } | |
621 | status = *usblp->statusbuf; | |
622 | if (copy_to_user ((void __user *)arg, &status, sizeof(int))) | |
623 | retval = -EFAULT; | |
624 | break; | |
625 | ||
626 | default: | |
627 | retval = -ENOTTY; | |
628 | } | |
629 | ||
630 | done: | |
631 | up (&usblp->sem); | |
632 | return retval; | |
633 | } | |
634 | ||
635 | static ssize_t usblp_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos) | |
636 | { | |
1da177e4 | 637 | struct usblp *usblp = file->private_data; |
8e695cdb | 638 | int timeout, rv, err = 0, transfer_length = 0; |
1da177e4 LT |
639 | size_t writecount = 0; |
640 | ||
641 | while (writecount < count) { | |
642 | if (!usblp->wcomplete) { | |
643 | barrier(); | |
644 | if (file->f_flags & O_NONBLOCK) { | |
645 | writecount += transfer_length; | |
646 | return writecount ? writecount : -EAGAIN; | |
647 | } | |
648 | ||
649 | timeout = USBLP_WRITE_TIMEOUT; | |
1da177e4 | 650 | |
8e695cdb ON |
651 | rv = wait_event_interruptible_timeout(usblp->wait, usblp->wcomplete || !usblp->present , timeout); |
652 | if (rv < 0) | |
653 | return writecount ? writecount : -EINTR; | |
1da177e4 | 654 | } |
1da177e4 LT |
655 | down (&usblp->sem); |
656 | if (!usblp->present) { | |
657 | up (&usblp->sem); | |
658 | return -ENODEV; | |
659 | } | |
660 | ||
661 | if (usblp->writeurb->status != 0) { | |
662 | if (usblp->quirks & USBLP_QUIRK_BIDIR) { | |
663 | if (!usblp->wcomplete) | |
664 | err("usblp%d: error %d writing to printer", | |
665 | usblp->minor, usblp->writeurb->status); | |
666 | err = usblp->writeurb->status; | |
667 | } else | |
668 | err = usblp_check_status(usblp, err); | |
669 | up (&usblp->sem); | |
670 | ||
671 | /* if the fault was due to disconnect, let khubd's | |
672 | * call to usblp_disconnect() grab usblp->sem ... | |
673 | */ | |
674 | schedule (); | |
675 | continue; | |
676 | } | |
677 | ||
678 | /* We must increment writecount here, and not at the | |
679 | * end of the loop. Otherwise, the final loop iteration may | |
680 | * be skipped, leading to incomplete printer output. | |
681 | */ | |
682 | writecount += transfer_length; | |
683 | if (writecount == count) { | |
684 | up(&usblp->sem); | |
685 | break; | |
686 | } | |
687 | ||
688 | transfer_length=(count - writecount); | |
689 | if (transfer_length > USBLP_BUF_SIZE) | |
690 | transfer_length = USBLP_BUF_SIZE; | |
691 | ||
692 | usblp->writeurb->transfer_buffer_length = transfer_length; | |
693 | ||
694 | if (copy_from_user(usblp->writeurb->transfer_buffer, | |
695 | buffer + writecount, transfer_length)) { | |
696 | up(&usblp->sem); | |
697 | return writecount ? writecount : -EFAULT; | |
698 | } | |
699 | ||
700 | usblp->writeurb->dev = usblp->dev; | |
701 | usblp->wcomplete = 0; | |
702 | err = usb_submit_urb(usblp->writeurb, GFP_KERNEL); | |
703 | if (err) { | |
704 | if (err != -ENOMEM) | |
705 | count = -EIO; | |
706 | else | |
707 | count = writecount ? writecount : -ENOMEM; | |
708 | up (&usblp->sem); | |
709 | break; | |
710 | } | |
711 | up (&usblp->sem); | |
712 | } | |
713 | ||
714 | return count; | |
715 | } | |
716 | ||
717 | static ssize_t usblp_read(struct file *file, char __user *buffer, size_t count, loff_t *ppos) | |
718 | { | |
719 | struct usblp *usblp = file->private_data; | |
8e695cdb | 720 | int rv; |
1da177e4 LT |
721 | |
722 | if (!usblp->bidir) | |
723 | return -EINVAL; | |
724 | ||
725 | down (&usblp->sem); | |
726 | if (!usblp->present) { | |
727 | count = -ENODEV; | |
728 | goto done; | |
729 | } | |
730 | ||
731 | if (!usblp->rcomplete) { | |
732 | barrier(); | |
733 | ||
734 | if (file->f_flags & O_NONBLOCK) { | |
735 | count = -EAGAIN; | |
736 | goto done; | |
737 | } | |
8e695cdb ON |
738 | up(&usblp->sem); |
739 | rv = wait_event_interruptible(usblp->wait, usblp->rcomplete || !usblp->present); | |
740 | down(&usblp->sem); | |
741 | if (rv < 0) { | |
742 | count = -EINTR; | |
743 | goto done; | |
1da177e4 | 744 | } |
1da177e4 LT |
745 | } |
746 | ||
747 | if (!usblp->present) { | |
748 | count = -ENODEV; | |
749 | goto done; | |
750 | } | |
751 | ||
752 | if (usblp->readurb->status) { | |
753 | err("usblp%d: error %d reading from printer", | |
754 | usblp->minor, usblp->readurb->status); | |
755 | usblp->readurb->dev = usblp->dev; | |
756 | usblp->readcount = 0; | |
757 | usblp->rcomplete = 0; | |
758 | if (usb_submit_urb(usblp->readurb, GFP_KERNEL) < 0) | |
759 | dbg("error submitting urb"); | |
760 | count = -EIO; | |
761 | goto done; | |
762 | } | |
763 | ||
764 | count = count < usblp->readurb->actual_length - usblp->readcount ? | |
765 | count : usblp->readurb->actual_length - usblp->readcount; | |
766 | ||
767 | if (copy_to_user(buffer, usblp->readurb->transfer_buffer + usblp->readcount, count)) { | |
768 | count = -EFAULT; | |
769 | goto done; | |
770 | } | |
771 | ||
772 | if ((usblp->readcount += count) == usblp->readurb->actual_length) { | |
773 | usblp->readcount = 0; | |
774 | usblp->readurb->dev = usblp->dev; | |
775 | usblp->rcomplete = 0; | |
776 | if (usb_submit_urb(usblp->readurb, GFP_KERNEL)) { | |
777 | count = -EIO; | |
778 | goto done; | |
779 | } | |
780 | } | |
781 | ||
782 | done: | |
783 | up (&usblp->sem); | |
784 | return count; | |
785 | } | |
786 | ||
787 | /* | |
788 | * Checks for printers that have quirks, such as requiring unidirectional | |
789 | * communication but reporting bidirectional; currently some HP printers | |
790 | * have this flaw (HP 810, 880, 895, etc.), or needing an init string | |
791 | * sent at each open (like some Epsons). | |
792 | * Returns 1 if found, 0 if not found. | |
793 | * | |
794 | * HP recommended that we use the bidirectional interface but | |
795 | * don't attempt any bulk IN transfers from the IN endpoint. | |
796 | * Here's some more detail on the problem: | |
797 | * The problem is not that it isn't bidirectional though. The problem | |
798 | * is that if you request a device ID, or status information, while | |
799 | * the buffers are full, the return data will end up in the print data | |
800 | * buffer. For example if you make sure you never request the device ID | |
801 | * while you are sending print data, and you don't try to query the | |
802 | * printer status every couple of milliseconds, you will probably be OK. | |
803 | */ | |
804 | static unsigned int usblp_quirks (__u16 vendor, __u16 product) | |
805 | { | |
806 | int i; | |
807 | ||
808 | for (i = 0; quirk_printers[i].vendorId; i++) { | |
809 | if (vendor == quirk_printers[i].vendorId && | |
810 | product == quirk_printers[i].productId) | |
811 | return quirk_printers[i].quirks; | |
812 | } | |
813 | return 0; | |
814 | } | |
815 | ||
066202dd | 816 | static const struct file_operations usblp_fops = { |
1da177e4 LT |
817 | .owner = THIS_MODULE, |
818 | .read = usblp_read, | |
819 | .write = usblp_write, | |
820 | .poll = usblp_poll, | |
318e479e PZ |
821 | .unlocked_ioctl = usblp_ioctl, |
822 | .compat_ioctl = usblp_ioctl, | |
1da177e4 LT |
823 | .open = usblp_open, |
824 | .release = usblp_release, | |
825 | }; | |
826 | ||
827 | static struct usb_class_driver usblp_class = { | |
d6e5bcf4 | 828 | .name = "lp%d", |
1da177e4 | 829 | .fops = &usblp_fops, |
1da177e4 LT |
830 | .minor_base = USBLP_MINOR_BASE, |
831 | }; | |
832 | ||
a9714c84 DW |
833 | static ssize_t usblp_show_ieee1284_id(struct device *dev, struct device_attribute *attr, char *buf) |
834 | { | |
835 | struct usb_interface *intf = to_usb_interface(dev); | |
836 | struct usblp *usblp = usb_get_intfdata (intf); | |
837 | ||
838 | if (usblp->device_id_string[0] == 0 && | |
839 | usblp->device_id_string[1] == 0) | |
840 | return 0; | |
841 | ||
842 | return sprintf(buf, "%s", usblp->device_id_string+2); | |
843 | } | |
844 | ||
845 | static DEVICE_ATTR(ieee1284_id, S_IRUGO, usblp_show_ieee1284_id, NULL); | |
846 | ||
1da177e4 LT |
847 | static int usblp_probe(struct usb_interface *intf, |
848 | const struct usb_device_id *id) | |
849 | { | |
850 | struct usb_device *dev = interface_to_usbdev (intf); | |
851 | struct usblp *usblp = NULL; | |
852 | int protocol; | |
853 | int retval; | |
854 | ||
855 | /* Malloc and start initializing usblp structure so we can use it | |
856 | * directly. */ | |
8e695cdb | 857 | if (!(usblp = kzalloc(sizeof(struct usblp), GFP_KERNEL))) { |
1da177e4 LT |
858 | err("out of memory for usblp"); |
859 | goto abort; | |
860 | } | |
1da177e4 LT |
861 | usblp->dev = dev; |
862 | init_MUTEX (&usblp->sem); | |
863 | init_waitqueue_head(&usblp->wait); | |
864 | usblp->ifnum = intf->cur_altsetting->desc.bInterfaceNumber; | |
865 | usblp->intf = intf; | |
866 | ||
867 | usblp->writeurb = usb_alloc_urb(0, GFP_KERNEL); | |
868 | if (!usblp->writeurb) { | |
869 | err("out of memory"); | |
870 | goto abort; | |
871 | } | |
872 | usblp->readurb = usb_alloc_urb(0, GFP_KERNEL); | |
873 | if (!usblp->readurb) { | |
874 | err("out of memory"); | |
875 | goto abort; | |
876 | } | |
877 | ||
878 | /* Malloc device ID string buffer to the largest expected length, | |
879 | * since we can re-query it on an ioctl and a dynamic string | |
880 | * could change in length. */ | |
881 | if (!(usblp->device_id_string = kmalloc(USBLP_DEVICE_ID_SIZE, GFP_KERNEL))) { | |
882 | err("out of memory for device_id_string"); | |
883 | goto abort; | |
884 | } | |
885 | ||
886 | usblp->writebuf = usblp->readbuf = NULL; | |
887 | usblp->writeurb->transfer_flags = URB_NO_TRANSFER_DMA_MAP; | |
888 | usblp->readurb->transfer_flags = URB_NO_TRANSFER_DMA_MAP; | |
889 | /* Malloc write & read buffers. We somewhat wastefully | |
890 | * malloc both regardless of bidirectionality, because the | |
891 | * alternate setting can be changed later via an ioctl. */ | |
892 | if (!(usblp->writebuf = usb_buffer_alloc(dev, USBLP_BUF_SIZE, | |
893 | GFP_KERNEL, &usblp->writeurb->transfer_dma))) { | |
894 | err("out of memory for write buf"); | |
895 | goto abort; | |
896 | } | |
897 | if (!(usblp->readbuf = usb_buffer_alloc(dev, USBLP_BUF_SIZE, | |
898 | GFP_KERNEL, &usblp->readurb->transfer_dma))) { | |
899 | err("out of memory for read buf"); | |
900 | goto abort; | |
901 | } | |
902 | ||
903 | /* Allocate buffer for printer status */ | |
904 | usblp->statusbuf = kmalloc(STATUS_BUF_SIZE, GFP_KERNEL); | |
905 | if (!usblp->statusbuf) { | |
906 | err("out of memory for statusbuf"); | |
907 | goto abort; | |
908 | } | |
909 | ||
910 | /* Lookup quirks for this printer. */ | |
911 | usblp->quirks = usblp_quirks( | |
912 | le16_to_cpu(dev->descriptor.idVendor), | |
913 | le16_to_cpu(dev->descriptor.idProduct)); | |
914 | ||
915 | /* Analyze and pick initial alternate settings and endpoints. */ | |
916 | protocol = usblp_select_alts(usblp); | |
917 | if (protocol < 0) { | |
918 | dbg("incompatible printer-class device 0x%4.4X/0x%4.4X", | |
919 | le16_to_cpu(dev->descriptor.idVendor), | |
920 | le16_to_cpu(dev->descriptor.idProduct)); | |
921 | goto abort; | |
922 | } | |
923 | ||
924 | /* Setup the selected alternate setting and endpoints. */ | |
925 | if (usblp_set_protocol(usblp, protocol) < 0) | |
926 | goto abort; | |
927 | ||
928 | /* Retrieve and store the device ID string. */ | |
929 | usblp_cache_device_id_string(usblp); | |
a9714c84 | 930 | device_create_file(&intf->dev, &dev_attr_ieee1284_id); |
1da177e4 LT |
931 | |
932 | #ifdef DEBUG | |
933 | usblp_check_status(usblp, 0); | |
934 | #endif | |
935 | ||
1da177e4 LT |
936 | usb_set_intfdata (intf, usblp); |
937 | ||
938 | usblp->present = 1; | |
939 | ||
940 | retval = usb_register_dev(intf, &usblp_class); | |
941 | if (retval) { | |
942 | err("Not able to get a minor for this device."); | |
943 | goto abort_intfdata; | |
944 | } | |
945 | usblp->minor = intf->minor; | |
a9714c84 DW |
946 | info("usblp%d: USB %sdirectional printer dev %d " |
947 | "if %d alt %d proto %d vid 0x%4.4X pid 0x%4.4X", | |
948 | usblp->minor, usblp->bidir ? "Bi" : "Uni", dev->devnum, | |
949 | usblp->ifnum, | |
950 | usblp->protocol[usblp->current_protocol].alt_setting, | |
951 | usblp->current_protocol, | |
952 | le16_to_cpu(usblp->dev->descriptor.idVendor), | |
953 | le16_to_cpu(usblp->dev->descriptor.idProduct)); | |
1da177e4 LT |
954 | |
955 | return 0; | |
956 | ||
957 | abort_intfdata: | |
958 | usb_set_intfdata (intf, NULL); | |
a9714c84 | 959 | device_remove_file(&intf->dev, &dev_attr_ieee1284_id); |
1da177e4 LT |
960 | abort: |
961 | if (usblp) { | |
962 | if (usblp->writebuf) | |
963 | usb_buffer_free (usblp->dev, USBLP_BUF_SIZE, | |
964 | usblp->writebuf, usblp->writeurb->transfer_dma); | |
965 | if (usblp->readbuf) | |
966 | usb_buffer_free (usblp->dev, USBLP_BUF_SIZE, | |
967 | usblp->readbuf, usblp->writeurb->transfer_dma); | |
968 | kfree(usblp->statusbuf); | |
969 | kfree(usblp->device_id_string); | |
970 | usb_free_urb(usblp->writeurb); | |
971 | usb_free_urb(usblp->readurb); | |
972 | kfree(usblp); | |
973 | } | |
974 | return -EIO; | |
975 | } | |
976 | ||
977 | /* | |
978 | * We are a "new" style driver with usb_device_id table, | |
979 | * but our requirements are too intricate for simple match to handle. | |
980 | * | |
981 | * The "proto_bias" option may be used to specify the preferred protocol | |
982 | * for all USB printers (1=7/1/1, 2=7/1/2, 3=7/1/3). If the device | |
983 | * supports the preferred protocol, then we bind to it. | |
984 | * | |
985 | * The best interface for us is 7/1/2, because it is compatible | |
986 | * with a stream of characters. If we find it, we bind to it. | |
987 | * | |
988 | * Note that the people from hpoj.sourceforge.net need to be able to | |
989 | * bind to 7/1/3 (MLC/1284.4), so we provide them ioctls for this purpose. | |
990 | * | |
991 | * Failing 7/1/2, we look for 7/1/3, even though it's probably not | |
992 | * stream-compatible, because this matches the behaviour of the old code. | |
993 | * | |
994 | * If nothing else, we bind to 7/1/1 - the unidirectional interface. | |
995 | */ | |
996 | static int usblp_select_alts(struct usblp *usblp) | |
997 | { | |
998 | struct usb_interface *if_alt; | |
999 | struct usb_host_interface *ifd; | |
1000 | struct usb_endpoint_descriptor *epd, *epwrite, *epread; | |
1001 | int p, i, e; | |
1002 | ||
1003 | if_alt = usblp->intf; | |
1004 | ||
1005 | for (p = 0; p < USBLP_MAX_PROTOCOLS; p++) | |
1006 | usblp->protocol[p].alt_setting = -1; | |
1007 | ||
1008 | /* Find out what we have. */ | |
1009 | for (i = 0; i < if_alt->num_altsetting; i++) { | |
1010 | ifd = &if_alt->altsetting[i]; | |
1011 | ||
1012 | if (ifd->desc.bInterfaceClass != 7 || ifd->desc.bInterfaceSubClass != 1) | |
1013 | continue; | |
1014 | ||
1015 | if (ifd->desc.bInterfaceProtocol < USBLP_FIRST_PROTOCOL || | |
1016 | ifd->desc.bInterfaceProtocol > USBLP_LAST_PROTOCOL) | |
1017 | continue; | |
1018 | ||
1019 | /* Look for bulk OUT and IN endpoints. */ | |
1020 | epwrite = epread = NULL; | |
1021 | for (e = 0; e < ifd->desc.bNumEndpoints; e++) { | |
1022 | epd = &ifd->endpoint[e].desc; | |
1023 | ||
1024 | if ((epd->bmAttributes&USB_ENDPOINT_XFERTYPE_MASK)!= | |
1025 | USB_ENDPOINT_XFER_BULK) | |
1026 | continue; | |
1027 | ||
1028 | if (!(epd->bEndpointAddress & USB_ENDPOINT_DIR_MASK)) { | |
1029 | if (!epwrite) | |
1030 | epwrite = epd; | |
1031 | ||
1032 | } else { | |
1033 | if (!epread) | |
1034 | epread = epd; | |
1035 | } | |
1036 | } | |
1037 | ||
1038 | /* Ignore buggy hardware without the right endpoints. */ | |
1039 | if (!epwrite || (ifd->desc.bInterfaceProtocol > 1 && !epread)) | |
1040 | continue; | |
1041 | ||
1042 | /* Turn off reads for 7/1/1 (unidirectional) interfaces | |
1043 | * and buggy bidirectional printers. */ | |
1044 | if (ifd->desc.bInterfaceProtocol == 1) { | |
1045 | epread = NULL; | |
1046 | } else if (usblp->quirks & USBLP_QUIRK_BIDIR) { | |
1047 | info("Disabling reads from problem bidirectional " | |
1048 | "printer on usblp%d", usblp->minor); | |
1049 | epread = NULL; | |
1050 | } | |
1051 | ||
1052 | usblp->protocol[ifd->desc.bInterfaceProtocol].alt_setting = | |
1053 | ifd->desc.bAlternateSetting; | |
1054 | usblp->protocol[ifd->desc.bInterfaceProtocol].epwrite = epwrite; | |
1055 | usblp->protocol[ifd->desc.bInterfaceProtocol].epread = epread; | |
1056 | } | |
1057 | ||
1058 | /* If our requested protocol is supported, then use it. */ | |
1059 | if (proto_bias >= USBLP_FIRST_PROTOCOL && | |
1060 | proto_bias <= USBLP_LAST_PROTOCOL && | |
1061 | usblp->protocol[proto_bias].alt_setting != -1) | |
1062 | return proto_bias; | |
1063 | ||
1064 | /* Ordering is important here. */ | |
1065 | if (usblp->protocol[2].alt_setting != -1) | |
1066 | return 2; | |
1067 | if (usblp->protocol[1].alt_setting != -1) | |
1068 | return 1; | |
1069 | if (usblp->protocol[3].alt_setting != -1) | |
1070 | return 3; | |
1071 | ||
1072 | /* If nothing is available, then don't bind to this device. */ | |
1073 | return -1; | |
1074 | } | |
1075 | ||
1076 | static int usblp_set_protocol(struct usblp *usblp, int protocol) | |
1077 | { | |
1078 | int r, alts; | |
1079 | ||
1080 | if (protocol < USBLP_FIRST_PROTOCOL || protocol > USBLP_LAST_PROTOCOL) | |
1081 | return -EINVAL; | |
1082 | ||
1083 | alts = usblp->protocol[protocol].alt_setting; | |
1084 | if (alts < 0) | |
1085 | return -EINVAL; | |
1086 | r = usb_set_interface(usblp->dev, usblp->ifnum, alts); | |
1087 | if (r < 0) { | |
1088 | err("can't set desired altsetting %d on interface %d", | |
1089 | alts, usblp->ifnum); | |
1090 | return r; | |
1091 | } | |
1092 | ||
1093 | usb_fill_bulk_urb(usblp->writeurb, usblp->dev, | |
1094 | usb_sndbulkpipe(usblp->dev, | |
1095 | usblp->protocol[protocol].epwrite->bEndpointAddress), | |
1096 | usblp->writebuf, 0, | |
1097 | usblp_bulk_write, usblp); | |
1098 | ||
1099 | usblp->bidir = (usblp->protocol[protocol].epread != NULL); | |
1100 | if (usblp->bidir) | |
1101 | usb_fill_bulk_urb(usblp->readurb, usblp->dev, | |
1102 | usb_rcvbulkpipe(usblp->dev, | |
1103 | usblp->protocol[protocol].epread->bEndpointAddress), | |
1104 | usblp->readbuf, USBLP_BUF_SIZE, | |
1105 | usblp_bulk_read, usblp); | |
1106 | ||
1107 | usblp->current_protocol = protocol; | |
1108 | dbg("usblp%d set protocol %d", usblp->minor, protocol); | |
1109 | return 0; | |
1110 | } | |
1111 | ||
1112 | /* Retrieves and caches device ID string. | |
1113 | * Returns length, including length bytes but not null terminator. | |
1114 | * On error, returns a negative errno value. */ | |
1115 | static int usblp_cache_device_id_string(struct usblp *usblp) | |
1116 | { | |
1117 | int err, length; | |
1118 | ||
1119 | err = usblp_get_id(usblp, 0, usblp->device_id_string, USBLP_DEVICE_ID_SIZE - 1); | |
1120 | if (err < 0) { | |
1121 | dbg("usblp%d: error = %d reading IEEE-1284 Device ID string", | |
1122 | usblp->minor, err); | |
1123 | usblp->device_id_string[0] = usblp->device_id_string[1] = '\0'; | |
1124 | return -EIO; | |
1125 | } | |
1126 | ||
1127 | /* First two bytes are length in big-endian. | |
1128 | * They count themselves, and we copy them into | |
1129 | * the user's buffer. */ | |
1130 | length = be16_to_cpu(*((__be16 *)usblp->device_id_string)); | |
1131 | if (length < 2) | |
1132 | length = 2; | |
1133 | else if (length >= USBLP_DEVICE_ID_SIZE) | |
1134 | length = USBLP_DEVICE_ID_SIZE - 1; | |
1135 | usblp->device_id_string[length] = '\0'; | |
1136 | ||
1137 | dbg("usblp%d Device ID string [len=%d]=\"%s\"", | |
1138 | usblp->minor, length, &usblp->device_id_string[2]); | |
1139 | ||
1140 | return length; | |
1141 | } | |
1142 | ||
1143 | static void usblp_disconnect(struct usb_interface *intf) | |
1144 | { | |
1145 | struct usblp *usblp = usb_get_intfdata (intf); | |
1146 | ||
1147 | usb_deregister_dev(intf, &usblp_class); | |
1148 | ||
1149 | if (!usblp || !usblp->dev) { | |
1150 | err("bogus disconnect"); | |
1151 | BUG (); | |
1152 | } | |
1153 | ||
a9714c84 DW |
1154 | device_remove_file(&intf->dev, &dev_attr_ieee1284_id); |
1155 | ||
4186ecf8 | 1156 | mutex_lock (&usblp_mutex); |
1da177e4 LT |
1157 | down (&usblp->sem); |
1158 | usblp->present = 0; | |
1159 | usb_set_intfdata (intf, NULL); | |
1160 | ||
1161 | usblp_unlink_urbs(usblp); | |
1162 | usb_buffer_free (usblp->dev, USBLP_BUF_SIZE, | |
1163 | usblp->writebuf, usblp->writeurb->transfer_dma); | |
1164 | usb_buffer_free (usblp->dev, USBLP_BUF_SIZE, | |
1165 | usblp->readbuf, usblp->readurb->transfer_dma); | |
1166 | up (&usblp->sem); | |
1167 | ||
1168 | if (!usblp->used) | |
1169 | usblp_cleanup (usblp); | |
4186ecf8 | 1170 | mutex_unlock (&usblp_mutex); |
1da177e4 LT |
1171 | } |
1172 | ||
1173 | static struct usb_device_id usblp_ids [] = { | |
1174 | { USB_DEVICE_INFO(7, 1, 1) }, | |
1175 | { USB_DEVICE_INFO(7, 1, 2) }, | |
1176 | { USB_DEVICE_INFO(7, 1, 3) }, | |
1177 | { USB_INTERFACE_INFO(7, 1, 1) }, | |
1178 | { USB_INTERFACE_INFO(7, 1, 2) }, | |
1179 | { USB_INTERFACE_INFO(7, 1, 3) }, | |
1180 | { } /* Terminating entry */ | |
1181 | }; | |
1182 | ||
1183 | MODULE_DEVICE_TABLE (usb, usblp_ids); | |
1184 | ||
1185 | static struct usb_driver usblp_driver = { | |
1da177e4 LT |
1186 | .name = "usblp", |
1187 | .probe = usblp_probe, | |
1188 | .disconnect = usblp_disconnect, | |
1189 | .id_table = usblp_ids, | |
1190 | }; | |
1191 | ||
1192 | static int __init usblp_init(void) | |
1193 | { | |
1194 | int retval; | |
1195 | retval = usb_register(&usblp_driver); | |
8e695cdb ON |
1196 | if (!retval) |
1197 | info(DRIVER_VERSION ": " DRIVER_DESC); | |
1198 | ||
1da177e4 LT |
1199 | return retval; |
1200 | } | |
1201 | ||
1202 | static void __exit usblp_exit(void) | |
1203 | { | |
1204 | usb_deregister(&usblp_driver); | |
1205 | } | |
1206 | ||
1207 | module_init(usblp_init); | |
1208 | module_exit(usblp_exit); | |
1209 | ||
1210 | MODULE_AUTHOR( DRIVER_AUTHOR ); | |
1211 | MODULE_DESCRIPTION( DRIVER_DESC ); | |
1212 | module_param(proto_bias, int, S_IRUGO | S_IWUSR); | |
1213 | MODULE_PARM_DESC(proto_bias, "Favourite protocol number"); | |
1214 | MODULE_LICENSE("GPL"); |