Commit | Line | Data |
---|---|---|
1da177e4 | 1 | /* |
317c67b8 | 2 | * usblp.c |
1da177e4 LT |
3 | * |
4 | * Copyright (c) 1999 Michael Gee <michael@linuxspecific.com> | |
a2531293 | 5 | * Copyright (c) 1999 Pavel Machek <pavel@ucw.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); | |
997ea58e | 30 | * use usb_alloc_coherent() for read buf & write buf; |
283face8 | 31 | * none - Maintained in Linux kernel after v0.13 |
1da177e4 LT |
32 | */ |
33 | ||
34 | /* | |
35 | * This program is free software; you can redistribute it and/or modify | |
36 | * it under the terms of the GNU General Public License as published by | |
37 | * the Free Software Foundation; either version 2 of the License, or | |
38 | * (at your option) any later version. | |
39 | * | |
40 | * This program is distributed in the hope that it will be useful, | |
41 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
42 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
43 | * GNU General Public License for more details. | |
44 | * | |
45 | * You should have received a copy of the GNU General Public License | |
46 | * along with this program; if not, write to the Free Software | |
47 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA | |
48 | */ | |
49 | ||
50 | #include <linux/module.h> | |
51 | #include <linux/kernel.h> | |
52 | #include <linux/sched.h> | |
1da177e4 LT |
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> | |
305e7be5 | 61 | #include <linux/ratelimit.h> |
1da177e4 LT |
62 | |
63 | /* | |
64 | * Version Information | |
65 | */ | |
1da177e4 LT |
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 | |
317c67b8 | 70 | #define USBLP_BUF_SIZE_IN 1024 |
1da177e4 LT |
71 | #define USBLP_DEVICE_ID_SIZE 1024 |
72 | ||
73 | /* ioctls: */ | |
1da177e4 LT |
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 | ||
283face8 | 119 | #define USBLP_CTL_TIMEOUT 5000 /* 5 seconds */ |
1da177e4 LT |
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 | ||
317c67b8 PZ |
131 | /* |
132 | * Locks down the locking order: | |
133 | * ->wmut locks wstatus. | |
134 | * ->mut locks the whole usblp, except [rw]complete, and thus, by indirection, | |
135 | * [rw]status. We only touch status when we know the side idle. | |
136 | * ->lock locks what interrupt accesses. | |
137 | */ | |
1da177e4 | 138 | struct usblp { |
916de027 | 139 | struct usb_device *dev; /* USB device */ |
317c67b8 PZ |
140 | struct mutex wmut; |
141 | struct mutex mut; | |
142 | spinlock_t lock; /* locks rcomplete, wcomplete */ | |
1da177e4 LT |
143 | char *readbuf; /* read transfer_buffer */ |
144 | char *statusbuf; /* status transfer_buffer */ | |
317c67b8 PZ |
145 | struct usb_anchor urbs; |
146 | wait_queue_head_t rwait, wwait; | |
1da177e4 LT |
147 | int readcount; /* Counter for reads */ |
148 | int ifnum; /* Interface number */ | |
149 | struct usb_interface *intf; /* The interface */ | |
150 | /* Alternate-setting numbers and endpoints for each protocol | |
151 | * (7/1/{index=1,2,3}) that the device supports: */ | |
152 | struct { | |
153 | int alt_setting; | |
154 | struct usb_endpoint_descriptor *epwrite; | |
155 | struct usb_endpoint_descriptor *epread; | |
156 | } protocol[USBLP_MAX_PROTOCOLS]; | |
157 | int current_protocol; | |
158 | int minor; /* minor number of device */ | |
317c67b8 PZ |
159 | int wcomplete, rcomplete; |
160 | int wstatus; /* bytes written or error */ | |
161 | int rstatus; /* bytes ready or error */ | |
1da177e4 | 162 | unsigned int quirks; /* quirks flags */ |
7f477358 | 163 | unsigned int flags; /* mode flags */ |
1da177e4 LT |
164 | unsigned char used; /* True if open */ |
165 | unsigned char present; /* True if not disconnected */ | |
166 | unsigned char bidir; /* interface is bidirectional */ | |
7f477358 | 167 | unsigned char no_paper; /* Paper Out happened */ |
1da177e4 LT |
168 | unsigned char *device_id_string; /* IEEE 1284 DEVICE ID string (ptr) */ |
169 | /* first 2 bytes are (big-endian) length */ | |
170 | }; | |
171 | ||
172 | #ifdef DEBUG | |
916de027 NK |
173 | static void usblp_dump(struct usblp *usblp) |
174 | { | |
1da177e4 LT |
175 | int p; |
176 | ||
177 | dbg("usblp=0x%p", usblp); | |
178 | dbg("dev=0x%p", usblp->dev); | |
179 | dbg("present=%d", usblp->present); | |
180 | dbg("readbuf=0x%p", usblp->readbuf); | |
1da177e4 LT |
181 | dbg("readcount=%d", usblp->readcount); |
182 | dbg("ifnum=%d", usblp->ifnum); | |
183 | for (p = USBLP_FIRST_PROTOCOL; p <= USBLP_LAST_PROTOCOL; p++) { | |
184 | dbg("protocol[%d].alt_setting=%d", p, usblp->protocol[p].alt_setting); | |
185 | dbg("protocol[%d].epwrite=%p", p, usblp->protocol[p].epwrite); | |
186 | dbg("protocol[%d].epread=%p", p, usblp->protocol[p].epread); | |
187 | } | |
188 | dbg("current_protocol=%d", usblp->current_protocol); | |
189 | dbg("minor=%d", usblp->minor); | |
317c67b8 PZ |
190 | dbg("wstatus=%d", usblp->wstatus); |
191 | dbg("rstatus=%d", usblp->rstatus); | |
1da177e4 LT |
192 | dbg("quirks=%d", usblp->quirks); |
193 | dbg("used=%d", usblp->used); | |
194 | dbg("bidir=%d", usblp->bidir); | |
195 | dbg("device_id_string=\"%s\"", | |
196 | usblp->device_id_string ? | |
197 | usblp->device_id_string + 2 : | |
198 | (unsigned char *)"(null)"); | |
199 | } | |
200 | #endif | |
201 | ||
202 | /* Quirks: various printer quirks are handled by this table & its flags. */ | |
203 | ||
204 | struct quirk_printer_struct { | |
205 | __u16 vendorId; | |
206 | __u16 productId; | |
207 | unsigned int quirks; | |
208 | }; | |
209 | ||
210 | #define USBLP_QUIRK_BIDIR 0x1 /* reports bidir but requires unidirectional mode (no INs/reads) */ | |
211 | #define USBLP_QUIRK_USB_INIT 0x2 /* needs vendor USB init string */ | |
5ec71db5 | 212 | #define USBLP_QUIRK_BAD_CLASS 0x4 /* descriptor uses vendor-specific Class or SubClass */ |
1da177e4 | 213 | |
4c4c9432 | 214 | static const struct quirk_printer_struct quirk_printers[] = { |
1da177e4 LT |
215 | { 0x03f0, 0x0004, USBLP_QUIRK_BIDIR }, /* HP DeskJet 895C */ |
216 | { 0x03f0, 0x0104, USBLP_QUIRK_BIDIR }, /* HP DeskJet 880C */ | |
217 | { 0x03f0, 0x0204, USBLP_QUIRK_BIDIR }, /* HP DeskJet 815C */ | |
218 | { 0x03f0, 0x0304, USBLP_QUIRK_BIDIR }, /* HP DeskJet 810C/812C */ | |
219 | { 0x03f0, 0x0404, USBLP_QUIRK_BIDIR }, /* HP DeskJet 830C */ | |
220 | { 0x03f0, 0x0504, USBLP_QUIRK_BIDIR }, /* HP DeskJet 885C */ | |
916de027 NK |
221 | { 0x03f0, 0x0604, USBLP_QUIRK_BIDIR }, /* HP DeskJet 840C */ |
222 | { 0x03f0, 0x0804, USBLP_QUIRK_BIDIR }, /* HP DeskJet 816C */ | |
1da177e4 LT |
223 | { 0x03f0, 0x1104, USBLP_QUIRK_BIDIR }, /* HP Deskjet 959C */ |
224 | { 0x0409, 0xefbe, USBLP_QUIRK_BIDIR }, /* NEC Picty900 (HP OEM) */ | |
225 | { 0x0409, 0xbef4, USBLP_QUIRK_BIDIR }, /* NEC Picty760 (HP OEM) */ | |
226 | { 0x0409, 0xf0be, USBLP_QUIRK_BIDIR }, /* NEC Picty920 (HP OEM) */ | |
227 | { 0x0409, 0xf1be, USBLP_QUIRK_BIDIR }, /* NEC Picty800 (HP OEM) */ | |
4f45d038 | 228 | { 0x0482, 0x0010, USBLP_QUIRK_BIDIR }, /* Kyocera Mita FS 820, by zut <kernel@zut.de> */ |
06a743bf | 229 | { 0x04f9, 0x000d, USBLP_QUIRK_BIDIR }, /* Brother Industries, Ltd HL-1440 Laser Printer */ |
5ec71db5 | 230 | { 0x04b8, 0x0202, USBLP_QUIRK_BAD_CLASS }, /* Seiko Epson Receipt Printer M129C */ |
1da177e4 LT |
231 | { 0, 0 } |
232 | }; | |
233 | ||
317c67b8 PZ |
234 | static int usblp_wwait(struct usblp *usblp, int nonblock); |
235 | static int usblp_wtest(struct usblp *usblp, int nonblock); | |
236 | static int usblp_rwait_and_lock(struct usblp *usblp, int nonblock); | |
237 | static int usblp_rtest(struct usblp *usblp, int nonblock); | |
238 | static int usblp_submit_read(struct usblp *usblp); | |
1da177e4 LT |
239 | static int usblp_select_alts(struct usblp *usblp); |
240 | static int usblp_set_protocol(struct usblp *usblp, int protocol); | |
241 | static int usblp_cache_device_id_string(struct usblp *usblp); | |
242 | ||
243 | /* forward reference to make our lives easier */ | |
244 | static struct usb_driver usblp_driver; | |
4186ecf8 | 245 | static DEFINE_MUTEX(usblp_mutex); /* locks the existence of usblp's */ |
1da177e4 LT |
246 | |
247 | /* | |
248 | * Functions for usblp control messages. | |
249 | */ | |
250 | ||
251 | static int usblp_ctrl_msg(struct usblp *usblp, int request, int type, int dir, int recip, int value, void *buf, int len) | |
252 | { | |
253 | int retval; | |
254 | int index = usblp->ifnum; | |
255 | ||
256 | /* High byte has the interface index. | |
257 | Low byte has the alternate setting. | |
258 | */ | |
916de027 NK |
259 | if ((request == USBLP_REQ_GET_ID) && (type == USB_TYPE_CLASS)) |
260 | index = (usblp->ifnum<<8)|usblp->protocol[usblp->current_protocol].alt_setting; | |
1da177e4 LT |
261 | |
262 | retval = usb_control_msg(usblp->dev, | |
263 | dir ? usb_rcvctrlpipe(usblp->dev, 0) : usb_sndctrlpipe(usblp->dev, 0), | |
283face8 | 264 | request, type | dir | recip, value, index, buf, len, USBLP_CTL_TIMEOUT); |
1da177e4 LT |
265 | dbg("usblp_control_msg: rq: 0x%02x dir: %d recip: %d value: %d idx: %d len: %#x result: %d", |
266 | request, !!dir, recip, value, index, len, retval); | |
267 | return retval < 0 ? retval : 0; | |
268 | } | |
269 | ||
270 | #define usblp_read_status(usblp, status)\ | |
271 | usblp_ctrl_msg(usblp, USBLP_REQ_GET_STATUS, USB_TYPE_CLASS, USB_DIR_IN, USB_RECIP_INTERFACE, 0, status, 1) | |
272 | #define usblp_get_id(usblp, config, id, maxlen)\ | |
273 | usblp_ctrl_msg(usblp, USBLP_REQ_GET_ID, USB_TYPE_CLASS, USB_DIR_IN, USB_RECIP_INTERFACE, config, id, maxlen) | |
274 | #define usblp_reset(usblp)\ | |
275 | usblp_ctrl_msg(usblp, USBLP_REQ_RESET, USB_TYPE_CLASS, USB_DIR_OUT, USB_RECIP_OTHER, 0, NULL, 0) | |
276 | ||
277 | #define usblp_hp_channel_change_request(usblp, channel, buffer) \ | |
278 | usblp_ctrl_msg(usblp, USBLP_REQ_HP_CHANNEL_CHANGE_REQUEST, USB_TYPE_VENDOR, USB_DIR_IN, USB_RECIP_INTERFACE, channel, buffer, 1) | |
279 | ||
280 | /* | |
281 | * See the description for usblp_select_alts() below for the usage | |
282 | * explanation. Look into your /proc/bus/usb/devices and dmesg in | |
283 | * case of any trouble. | |
284 | */ | |
285 | static int proto_bias = -1; | |
286 | ||
287 | /* | |
288 | * URB callback. | |
289 | */ | |
290 | ||
7d12e780 | 291 | static void usblp_bulk_read(struct urb *urb) |
1da177e4 LT |
292 | { |
293 | struct usblp *usblp = urb->context; | |
18ac3016 | 294 | int status = urb->status; |
1da177e4 | 295 | |
317c67b8 | 296 | if (usblp->present && usblp->used) { |
18ac3016 | 297 | if (status) |
317c67b8 PZ |
298 | printk(KERN_WARNING "usblp%d: " |
299 | "nonzero read bulk status received: %d\n", | |
18ac3016 | 300 | usblp->minor, status); |
317c67b8 PZ |
301 | } |
302 | spin_lock(&usblp->lock); | |
18ac3016 GKH |
303 | if (status < 0) |
304 | usblp->rstatus = status; | |
317c67b8 PZ |
305 | else |
306 | usblp->rstatus = urb->actual_length; | |
1da177e4 | 307 | usblp->rcomplete = 1; |
317c67b8 PZ |
308 | wake_up(&usblp->rwait); |
309 | spin_unlock(&usblp->lock); | |
310 | ||
311 | usb_free_urb(urb); | |
1da177e4 LT |
312 | } |
313 | ||
7d12e780 | 314 | static void usblp_bulk_write(struct urb *urb) |
1da177e4 LT |
315 | { |
316 | struct usblp *usblp = urb->context; | |
18ac3016 | 317 | int status = urb->status; |
1da177e4 | 318 | |
317c67b8 | 319 | if (usblp->present && usblp->used) { |
18ac3016 | 320 | if (status) |
317c67b8 PZ |
321 | printk(KERN_WARNING "usblp%d: " |
322 | "nonzero write bulk status received: %d\n", | |
18ac3016 | 323 | usblp->minor, status); |
317c67b8 PZ |
324 | } |
325 | spin_lock(&usblp->lock); | |
18ac3016 GKH |
326 | if (status < 0) |
327 | usblp->wstatus = status; | |
317c67b8 PZ |
328 | else |
329 | usblp->wstatus = urb->actual_length; | |
7f477358 | 330 | usblp->no_paper = 0; |
1da177e4 | 331 | usblp->wcomplete = 1; |
317c67b8 PZ |
332 | wake_up(&usblp->wwait); |
333 | spin_unlock(&usblp->lock); | |
334 | ||
317c67b8 | 335 | usb_free_urb(urb); |
1da177e4 LT |
336 | } |
337 | ||
338 | /* | |
339 | * Get and print printer errors. | |
340 | */ | |
341 | ||
4c4c9432 | 342 | static const char *usblp_messages[] = { "ok", "out of paper", "off-line", "on fire" }; |
1da177e4 LT |
343 | |
344 | static int usblp_check_status(struct usblp *usblp, int err) | |
345 | { | |
346 | unsigned char status, newerr = 0; | |
347 | int error; | |
348 | ||
fc401e69 PZ |
349 | mutex_lock(&usblp->mut); |
350 | if ((error = usblp_read_status(usblp, usblp->statusbuf)) < 0) { | |
351 | mutex_unlock(&usblp->mut); | |
305e7be5 | 352 | printk_ratelimited(KERN_ERR |
317c67b8 | 353 | "usblp%d: error %d reading printer status\n", |
0bc8e009 | 354 | usblp->minor, error); |
1da177e4 LT |
355 | return 0; |
356 | } | |
1da177e4 | 357 | status = *usblp->statusbuf; |
fc401e69 | 358 | mutex_unlock(&usblp->mut); |
1da177e4 LT |
359 | |
360 | if (~status & LP_PERRORP) | |
361 | newerr = 3; | |
362 | if (status & LP_POUTPA) | |
363 | newerr = 1; | |
364 | if (~status & LP_PSELECD) | |
365 | newerr = 2; | |
366 | ||
317c67b8 PZ |
367 | if (newerr != err) { |
368 | printk(KERN_INFO "usblp%d: %s\n", | |
369 | usblp->minor, usblp_messages[newerr]); | |
370 | } | |
1da177e4 LT |
371 | |
372 | return newerr; | |
373 | } | |
374 | ||
916de027 | 375 | static int handle_bidir(struct usblp *usblp) |
516077c1 | 376 | { |
3a90f818 | 377 | if (usblp->bidir && usblp->used) { |
317c67b8 | 378 | if (usblp_submit_read(usblp) < 0) |
516077c1 | 379 | return -EIO; |
516077c1 | 380 | } |
516077c1 ON |
381 | return 0; |
382 | } | |
383 | ||
1da177e4 LT |
384 | /* |
385 | * File op functions. | |
386 | */ | |
387 | ||
388 | static int usblp_open(struct inode *inode, struct file *file) | |
389 | { | |
390 | int minor = iminor(inode); | |
391 | struct usblp *usblp; | |
392 | struct usb_interface *intf; | |
393 | int retval; | |
394 | ||
395 | if (minor < 0) | |
396 | return -ENODEV; | |
397 | ||
916de027 | 398 | mutex_lock(&usblp_mutex); |
1da177e4 LT |
399 | |
400 | retval = -ENODEV; | |
401 | intf = usb_find_interface(&usblp_driver, minor); | |
916de027 | 402 | if (!intf) |
1da177e4 | 403 | goto out; |
916de027 | 404 | usblp = usb_get_intfdata(intf); |
1da177e4 LT |
405 | if (!usblp || !usblp->dev || !usblp->present) |
406 | goto out; | |
407 | ||
408 | retval = -EBUSY; | |
409 | if (usblp->used) | |
410 | goto out; | |
411 | ||
412 | /* | |
7f477358 PZ |
413 | * We do not implement LP_ABORTOPEN/LPABORTOPEN for two reasons: |
414 | * - We do not want persistent state which close(2) does not clear | |
415 | * - It is not used anyway, according to CUPS people | |
1da177e4 | 416 | */ |
1da177e4 | 417 | |
d0532184 ON |
418 | retval = usb_autopm_get_interface(intf); |
419 | if (retval < 0) | |
420 | goto out; | |
1da177e4 LT |
421 | usblp->used = 1; |
422 | file->private_data = usblp; | |
423 | ||
1da177e4 | 424 | usblp->wcomplete = 1; /* we begin writeable */ |
317c67b8 | 425 | usblp->wstatus = 0; |
1da177e4 LT |
426 | usblp->rcomplete = 0; |
427 | ||
516077c1 | 428 | if (handle_bidir(usblp) < 0) { |
19028690 | 429 | usb_autopm_put_interface(intf); |
97cb95d1 | 430 | usblp->used = 0; |
516077c1 ON |
431 | file->private_data = NULL; |
432 | retval = -EIO; | |
1da177e4 LT |
433 | } |
434 | out: | |
916de027 | 435 | mutex_unlock(&usblp_mutex); |
1da177e4 LT |
436 | return retval; |
437 | } | |
438 | ||
916de027 | 439 | static void usblp_cleanup(struct usblp *usblp) |
1da177e4 | 440 | { |
317c67b8 | 441 | printk(KERN_INFO "usblp%d: removed\n", usblp->minor); |
1da177e4 | 442 | |
317c67b8 | 443 | kfree(usblp->readbuf); |
916de027 NK |
444 | kfree(usblp->device_id_string); |
445 | kfree(usblp->statusbuf); | |
446 | kfree(usblp); | |
1da177e4 LT |
447 | } |
448 | ||
449 | static void usblp_unlink_urbs(struct usblp *usblp) | |
450 | { | |
317c67b8 | 451 | usb_kill_anchored_urbs(&usblp->urbs); |
1da177e4 LT |
452 | } |
453 | ||
454 | static int usblp_release(struct inode *inode, struct file *file) | |
455 | { | |
456 | struct usblp *usblp = file->private_data; | |
457 | ||
7f477358 PZ |
458 | usblp->flags &= ~LP_ABORT; |
459 | ||
916de027 | 460 | mutex_lock(&usblp_mutex); |
1da177e4 LT |
461 | usblp->used = 0; |
462 | if (usblp->present) { | |
463 | usblp_unlink_urbs(usblp); | |
d0532184 | 464 | usb_autopm_put_interface(usblp->intf); |
916de027 NK |
465 | } else /* finish cleanup from disconnect */ |
466 | usblp_cleanup(usblp); | |
467 | mutex_unlock(&usblp_mutex); | |
1da177e4 LT |
468 | return 0; |
469 | } | |
470 | ||
471 | /* No kernel lock - fine */ | |
472 | static unsigned int usblp_poll(struct file *file, struct poll_table_struct *wait) | |
473 | { | |
317c67b8 PZ |
474 | int ret; |
475 | unsigned long flags; | |
476 | ||
1da177e4 | 477 | struct usblp *usblp = file->private_data; |
317c67b8 PZ |
478 | /* Should we check file->f_mode & FMODE_WRITE before poll_wait()? */ |
479 | poll_wait(file, &usblp->rwait, wait); | |
480 | poll_wait(file, &usblp->wwait, wait); | |
481 | spin_lock_irqsave(&usblp->lock, flags); | |
283face8 PZ |
482 | ret = ((usblp->bidir && usblp->rcomplete) ? POLLIN | POLLRDNORM : 0) | |
483 | ((usblp->no_paper || usblp->wcomplete) ? POLLOUT | POLLWRNORM : 0); | |
317c67b8 PZ |
484 | spin_unlock_irqrestore(&usblp->lock, flags); |
485 | return ret; | |
1da177e4 LT |
486 | } |
487 | ||
318e479e | 488 | static long usblp_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
1da177e4 LT |
489 | { |
490 | struct usblp *usblp = file->private_data; | |
491 | int length, err, i; | |
492 | unsigned char newChannel; | |
493 | int status; | |
494 | int twoints[2]; | |
495 | int retval = 0; | |
496 | ||
916de027 | 497 | mutex_lock(&usblp->mut); |
1da177e4 LT |
498 | if (!usblp->present) { |
499 | retval = -ENODEV; | |
500 | goto done; | |
501 | } | |
502 | ||
503 | dbg("usblp_ioctl: cmd=0x%x (%c nr=%d len=%d dir=%d)", cmd, _IOC_TYPE(cmd), | |
916de027 | 504 | _IOC_NR(cmd), _IOC_SIZE(cmd), _IOC_DIR(cmd)); |
1da177e4 LT |
505 | |
506 | if (_IOC_TYPE(cmd) == 'P') /* new-style ioctl number */ | |
507 | ||
508 | switch (_IOC_NR(cmd)) { | |
509 | ||
916de027 NK |
510 | case IOCNR_GET_DEVICE_ID: /* get the DEVICE_ID string */ |
511 | if (_IOC_DIR(cmd) != _IOC_READ) { | |
512 | retval = -EINVAL; | |
513 | goto done; | |
514 | } | |
1da177e4 | 515 | |
916de027 NK |
516 | length = usblp_cache_device_id_string(usblp); |
517 | if (length < 0) { | |
518 | retval = length; | |
519 | goto done; | |
520 | } | |
521 | if (length > _IOC_SIZE(cmd)) | |
522 | length = _IOC_SIZE(cmd); /* truncate */ | |
523 | ||
524 | if (copy_to_user((void __user *) arg, | |
525 | usblp->device_id_string, | |
526 | (unsigned long) length)) { | |
527 | retval = -EFAULT; | |
528 | goto done; | |
529 | } | |
1da177e4 | 530 | |
916de027 | 531 | break; |
1da177e4 | 532 | |
916de027 NK |
533 | case IOCNR_GET_PROTOCOLS: |
534 | if (_IOC_DIR(cmd) != _IOC_READ || | |
535 | _IOC_SIZE(cmd) < sizeof(twoints)) { | |
536 | retval = -EINVAL; | |
537 | goto done; | |
538 | } | |
1da177e4 | 539 | |
916de027 NK |
540 | twoints[0] = usblp->current_protocol; |
541 | twoints[1] = 0; | |
542 | for (i = USBLP_FIRST_PROTOCOL; | |
543 | i <= USBLP_LAST_PROTOCOL; i++) { | |
544 | if (usblp->protocol[i].alt_setting >= 0) | |
545 | twoints[1] |= (1<<i); | |
546 | } | |
1da177e4 | 547 | |
916de027 NK |
548 | if (copy_to_user((void __user *)arg, |
549 | (unsigned char *)twoints, | |
550 | sizeof(twoints))) { | |
551 | retval = -EFAULT; | |
552 | goto done; | |
553 | } | |
1da177e4 | 554 | |
916de027 | 555 | break; |
1da177e4 | 556 | |
916de027 NK |
557 | case IOCNR_SET_PROTOCOL: |
558 | if (_IOC_DIR(cmd) != _IOC_WRITE) { | |
559 | retval = -EINVAL; | |
560 | goto done; | |
561 | } | |
1da177e4 LT |
562 | |
563 | #ifdef DEBUG | |
916de027 NK |
564 | if (arg == -10) { |
565 | usblp_dump(usblp); | |
566 | break; | |
567 | } | |
1da177e4 LT |
568 | #endif |
569 | ||
916de027 NK |
570 | usblp_unlink_urbs(usblp); |
571 | retval = usblp_set_protocol(usblp, arg); | |
572 | if (retval < 0) { | |
573 | usblp_set_protocol(usblp, | |
574 | usblp->current_protocol); | |
575 | } | |
576 | break; | |
1da177e4 | 577 | |
916de027 NK |
578 | case IOCNR_HP_SET_CHANNEL: |
579 | if (_IOC_DIR(cmd) != _IOC_WRITE || | |
580 | le16_to_cpu(usblp->dev->descriptor.idVendor) != 0x03F0 || | |
581 | usblp->quirks & USBLP_QUIRK_BIDIR) { | |
582 | retval = -EINVAL; | |
583 | goto done; | |
584 | } | |
1da177e4 | 585 | |
916de027 NK |
586 | err = usblp_hp_channel_change_request(usblp, |
587 | arg, &newChannel); | |
588 | if (err < 0) { | |
589 | dev_err(&usblp->dev->dev, | |
590 | "usblp%d: error = %d setting " | |
591 | "HP channel\n", | |
592 | usblp->minor, err); | |
593 | retval = -EIO; | |
594 | goto done; | |
595 | } | |
1da177e4 | 596 | |
916de027 NK |
597 | dbg("usblp%d requested/got HP channel %ld/%d", |
598 | usblp->minor, arg, newChannel); | |
599 | break; | |
1da177e4 | 600 | |
916de027 NK |
601 | case IOCNR_GET_BUS_ADDRESS: |
602 | if (_IOC_DIR(cmd) != _IOC_READ || | |
603 | _IOC_SIZE(cmd) < sizeof(twoints)) { | |
604 | retval = -EINVAL; | |
605 | goto done; | |
606 | } | |
1da177e4 | 607 | |
916de027 NK |
608 | twoints[0] = usblp->dev->bus->busnum; |
609 | twoints[1] = usblp->dev->devnum; | |
610 | if (copy_to_user((void __user *)arg, | |
611 | (unsigned char *)twoints, | |
612 | sizeof(twoints))) { | |
613 | retval = -EFAULT; | |
614 | goto done; | |
615 | } | |
1da177e4 | 616 | |
916de027 NK |
617 | dbg("usblp%d is bus=%d, device=%d", |
618 | usblp->minor, twoints[0], twoints[1]); | |
619 | break; | |
1da177e4 | 620 | |
916de027 NK |
621 | case IOCNR_GET_VID_PID: |
622 | if (_IOC_DIR(cmd) != _IOC_READ || | |
623 | _IOC_SIZE(cmd) < sizeof(twoints)) { | |
624 | retval = -EINVAL; | |
625 | goto done; | |
626 | } | |
1da177e4 | 627 | |
916de027 NK |
628 | twoints[0] = le16_to_cpu(usblp->dev->descriptor.idVendor); |
629 | twoints[1] = le16_to_cpu(usblp->dev->descriptor.idProduct); | |
630 | if (copy_to_user((void __user *)arg, | |
631 | (unsigned char *)twoints, | |
632 | sizeof(twoints))) { | |
633 | retval = -EFAULT; | |
634 | goto done; | |
635 | } | |
1da177e4 | 636 | |
916de027 NK |
637 | dbg("usblp%d is VID=0x%4.4X, PID=0x%4.4X", |
638 | usblp->minor, twoints[0], twoints[1]); | |
639 | break; | |
1da177e4 | 640 | |
916de027 NK |
641 | case IOCNR_SOFT_RESET: |
642 | if (_IOC_DIR(cmd) != _IOC_NONE) { | |
643 | retval = -EINVAL; | |
644 | goto done; | |
645 | } | |
646 | retval = usblp_reset(usblp); | |
647 | break; | |
648 | default: | |
649 | retval = -ENOTTY; | |
1da177e4 LT |
650 | } |
651 | else /* old-style ioctl value */ | |
652 | switch (cmd) { | |
653 | ||
916de027 NK |
654 | case LPGETSTATUS: |
655 | if ((retval = usblp_read_status(usblp, usblp->statusbuf))) { | |
305e7be5 | 656 | printk_ratelimited(KERN_ERR "usblp%d:" |
916de027 NK |
657 | "failed reading printer status (%d)\n", |
658 | usblp->minor, retval); | |
659 | retval = -EIO; | |
660 | goto done; | |
661 | } | |
662 | status = *usblp->statusbuf; | |
663 | if (copy_to_user((void __user *)arg, &status, sizeof(int))) | |
664 | retval = -EFAULT; | |
665 | break; | |
1da177e4 | 666 | |
916de027 NK |
667 | case LPABORT: |
668 | if (arg) | |
669 | usblp->flags |= LP_ABORT; | |
670 | else | |
671 | usblp->flags &= ~LP_ABORT; | |
672 | break; | |
7f477358 | 673 | |
916de027 NK |
674 | default: |
675 | retval = -ENOTTY; | |
1da177e4 LT |
676 | } |
677 | ||
678 | done: | |
916de027 | 679 | mutex_unlock(&usblp->mut); |
1da177e4 LT |
680 | return retval; |
681 | } | |
682 | ||
42cb967f PZ |
683 | static struct urb *usblp_new_writeurb(struct usblp *usblp, int transfer_length) |
684 | { | |
685 | struct urb *urb; | |
686 | char *writebuf; | |
687 | ||
688 | if ((writebuf = kmalloc(transfer_length, GFP_KERNEL)) == NULL) | |
689 | return NULL; | |
690 | if ((urb = usb_alloc_urb(0, GFP_KERNEL)) == NULL) { | |
691 | kfree(writebuf); | |
692 | return NULL; | |
693 | } | |
694 | ||
695 | usb_fill_bulk_urb(urb, usblp->dev, | |
696 | usb_sndbulkpipe(usblp->dev, | |
697 | usblp->protocol[usblp->current_protocol].epwrite->bEndpointAddress), | |
698 | writebuf, transfer_length, usblp_bulk_write, usblp); | |
699 | urb->transfer_flags |= URB_FREE_BUFFER; | |
700 | ||
701 | return urb; | |
702 | } | |
703 | ||
1da177e4 LT |
704 | static ssize_t usblp_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos) |
705 | { | |
1da177e4 | 706 | struct usblp *usblp = file->private_data; |
317c67b8 PZ |
707 | struct urb *writeurb; |
708 | int rv; | |
709 | int transfer_length; | |
710 | ssize_t writecount = 0; | |
711 | ||
712 | if (mutex_lock_interruptible(&usblp->wmut)) { | |
713 | rv = -EINTR; | |
714 | goto raise_biglock; | |
715 | } | |
716 | if ((rv = usblp_wwait(usblp, !!(file->f_flags & O_NONBLOCK))) < 0) | |
717 | goto raise_wait; | |
1da177e4 LT |
718 | |
719 | while (writecount < count) { | |
317c67b8 PZ |
720 | /* |
721 | * Step 1: Submit next block. | |
1da177e4 | 722 | */ |
317c67b8 | 723 | if ((transfer_length = count - writecount) > USBLP_BUF_SIZE) |
1da177e4 LT |
724 | transfer_length = USBLP_BUF_SIZE; |
725 | ||
317c67b8 | 726 | rv = -ENOMEM; |
42cb967f | 727 | if ((writeurb = usblp_new_writeurb(usblp, transfer_length)) == NULL) |
317c67b8 | 728 | goto raise_urb; |
317c67b8 PZ |
729 | usb_anchor_urb(writeurb, &usblp->urbs); |
730 | ||
42cb967f | 731 | if (copy_from_user(writeurb->transfer_buffer, |
1da177e4 | 732 | buffer + writecount, transfer_length)) { |
317c67b8 PZ |
733 | rv = -EFAULT; |
734 | goto raise_badaddr; | |
1da177e4 LT |
735 | } |
736 | ||
317c67b8 | 737 | spin_lock_irq(&usblp->lock); |
1da177e4 | 738 | usblp->wcomplete = 0; |
317c67b8 PZ |
739 | spin_unlock_irq(&usblp->lock); |
740 | if ((rv = usb_submit_urb(writeurb, GFP_KERNEL)) < 0) { | |
741 | usblp->wstatus = 0; | |
742 | spin_lock_irq(&usblp->lock); | |
7f477358 | 743 | usblp->no_paper = 0; |
6c8df79f | 744 | usblp->wcomplete = 1; |
317c67b8 PZ |
745 | wake_up(&usblp->wwait); |
746 | spin_unlock_irq(&usblp->lock); | |
747 | if (rv != -ENOMEM) | |
748 | rv = -EIO; | |
749 | goto raise_submit; | |
750 | } | |
751 | ||
752 | /* | |
753 | * Step 2: Wait for transfer to end, collect results. | |
754 | */ | |
755 | rv = usblp_wwait(usblp, !!(file->f_flags&O_NONBLOCK)); | |
756 | if (rv < 0) { | |
10e48522 PZ |
757 | if (rv == -EAGAIN) { |
758 | /* Presume that it's going to complete well. */ | |
759 | writecount += transfer_length; | |
760 | } | |
7f477358 PZ |
761 | if (rv == -ENOSPC) { |
762 | spin_lock_irq(&usblp->lock); | |
763 | usblp->no_paper = 1; /* Mark for poll(2) */ | |
764 | spin_unlock_irq(&usblp->lock); | |
765 | writecount += transfer_length; | |
766 | } | |
10e48522 | 767 | /* Leave URB dangling, to be cleaned on close. */ |
317c67b8 | 768 | goto collect_error; |
1da177e4 | 769 | } |
317c67b8 PZ |
770 | |
771 | if (usblp->wstatus < 0) { | |
317c67b8 PZ |
772 | rv = -EIO; |
773 | goto collect_error; | |
774 | } | |
775 | /* | |
776 | * This is critical: it must be our URB, not other writer's. | |
777 | * The wmut exists mainly to cover us here. | |
778 | */ | |
779 | writecount += usblp->wstatus; | |
1da177e4 LT |
780 | } |
781 | ||
317c67b8 PZ |
782 | mutex_unlock(&usblp->wmut); |
783 | return writecount; | |
784 | ||
785 | raise_submit: | |
786 | raise_badaddr: | |
787 | usb_unanchor_urb(writeurb); | |
788 | usb_free_urb(writeurb); | |
789 | raise_urb: | |
317c67b8 PZ |
790 | raise_wait: |
791 | collect_error: /* Out of raise sequence */ | |
792 | mutex_unlock(&usblp->wmut); | |
793 | raise_biglock: | |
794 | return writecount ? writecount : rv; | |
1da177e4 LT |
795 | } |
796 | ||
317c67b8 PZ |
797 | /* |
798 | * Notice that we fail to restart in a few cases: on EFAULT, on restart | |
799 | * error, etc. This is the historical behaviour. In all such cases we return | |
800 | * EIO, and applications loop in order to get the new read going. | |
801 | */ | |
802 | static ssize_t usblp_read(struct file *file, char __user *buffer, size_t len, loff_t *ppos) | |
1da177e4 LT |
803 | { |
804 | struct usblp *usblp = file->private_data; | |
317c67b8 PZ |
805 | ssize_t count; |
806 | ssize_t avail; | |
807 | int rv; | |
1da177e4 LT |
808 | |
809 | if (!usblp->bidir) | |
810 | return -EINVAL; | |
811 | ||
317c67b8 PZ |
812 | rv = usblp_rwait_and_lock(usblp, !!(file->f_flags & O_NONBLOCK)); |
813 | if (rv < 0) | |
814 | return rv; | |
815 | ||
816 | if ((avail = usblp->rstatus) < 0) { | |
817 | printk(KERN_ERR "usblp%d: error %d reading from printer\n", | |
818 | usblp->minor, (int)avail); | |
819 | usblp_submit_read(usblp); | |
820 | count = -EIO; | |
1da177e4 LT |
821 | goto done; |
822 | } | |
823 | ||
317c67b8 PZ |
824 | count = len < avail - usblp->readcount ? len : avail - usblp->readcount; |
825 | if (count != 0 && | |
826 | copy_to_user(buffer, usblp->readbuf + usblp->readcount, count)) { | |
827 | count = -EFAULT; | |
828 | goto done; | |
829 | } | |
1da177e4 | 830 | |
317c67b8 PZ |
831 | if ((usblp->readcount += count) == avail) { |
832 | if (usblp_submit_read(usblp) < 0) { | |
833 | /* We don't want to leak USB return codes into errno. */ | |
834 | if (count == 0) | |
835 | count = -EIO; | |
8e695cdb | 836 | goto done; |
1da177e4 | 837 | } |
1da177e4 LT |
838 | } |
839 | ||
317c67b8 | 840 | done: |
916de027 | 841 | mutex_unlock(&usblp->mut); |
317c67b8 PZ |
842 | return count; |
843 | } | |
844 | ||
845 | /* | |
846 | * Wait for the write path to come idle. | |
847 | * This is called under the ->wmut, so the idle path stays idle. | |
848 | * | |
849 | * Our write path has a peculiar property: it does not buffer like a tty, | |
850 | * but waits for the write to succeed. This allows our ->release to bug out | |
851 | * without waiting for writes to drain. But it obviously does not work | |
852 | * when O_NONBLOCK is set. So, applications setting O_NONBLOCK must use | |
853 | * select(2) or poll(2) to wait for the buffer to drain before closing. | |
854 | * Alternatively, set blocking mode with fcntl and issue a zero-size write. | |
317c67b8 PZ |
855 | */ |
856 | static int usblp_wwait(struct usblp *usblp, int nonblock) | |
857 | { | |
858 | DECLARE_WAITQUEUE(waita, current); | |
859 | int rc; | |
7f477358 | 860 | int err = 0; |
317c67b8 PZ |
861 | |
862 | add_wait_queue(&usblp->wwait, &waita); | |
863 | for (;;) { | |
7f477358 | 864 | set_current_state(TASK_INTERRUPTIBLE); |
317c67b8 PZ |
865 | if (mutex_lock_interruptible(&usblp->mut)) { |
866 | rc = -EINTR; | |
867 | break; | |
868 | } | |
7f477358 | 869 | rc = usblp_wtest(usblp, nonblock); |
317c67b8 | 870 | mutex_unlock(&usblp->mut); |
7f477358 | 871 | if (rc <= 0) |
317c67b8 | 872 | break; |
7f477358 | 873 | |
dd44be6b PZ |
874 | if (schedule_timeout(msecs_to_jiffies(1500)) == 0) { |
875 | if (usblp->flags & LP_ABORT) { | |
7f477358 PZ |
876 | err = usblp_check_status(usblp, err); |
877 | if (err == 1) { /* Paper out */ | |
878 | rc = -ENOSPC; | |
879 | break; | |
880 | } | |
dd44be6b PZ |
881 | } else { |
882 | /* Prod the printer, Gentoo#251237. */ | |
883 | mutex_lock(&usblp->mut); | |
884 | usblp_read_status(usblp, usblp->statusbuf); | |
885 | mutex_unlock(&usblp->mut); | |
7f477358 | 886 | } |
7f477358 | 887 | } |
1da177e4 | 888 | } |
317c67b8 PZ |
889 | set_current_state(TASK_RUNNING); |
890 | remove_wait_queue(&usblp->wwait, &waita); | |
891 | return rc; | |
892 | } | |
1da177e4 | 893 | |
317c67b8 PZ |
894 | static int usblp_wtest(struct usblp *usblp, int nonblock) |
895 | { | |
896 | unsigned long flags; | |
897 | ||
898 | if (!usblp->present) | |
899 | return -ENODEV; | |
900 | if (signal_pending(current)) | |
901 | return -EINTR; | |
902 | spin_lock_irqsave(&usblp->lock, flags); | |
903 | if (usblp->wcomplete) { | |
904 | spin_unlock_irqrestore(&usblp->lock, flags); | |
905 | return 0; | |
516077c1 | 906 | } |
317c67b8 | 907 | spin_unlock_irqrestore(&usblp->lock, flags); |
317c67b8 PZ |
908 | if (nonblock) |
909 | return -EAGAIN; | |
910 | return 1; | |
911 | } | |
516077c1 | 912 | |
317c67b8 PZ |
913 | /* |
914 | * Wait for read bytes to become available. This probably should have been | |
915 | * called usblp_r_lock_and_wait(), because we lock first. But it's a traditional | |
916 | * name for functions which lock and return. | |
917 | * | |
918 | * We do not use wait_event_interruptible because it makes locking iffy. | |
919 | */ | |
920 | static int usblp_rwait_and_lock(struct usblp *usblp, int nonblock) | |
921 | { | |
922 | DECLARE_WAITQUEUE(waita, current); | |
923 | int rc; | |
924 | ||
925 | add_wait_queue(&usblp->rwait, &waita); | |
926 | for (;;) { | |
927 | if (mutex_lock_interruptible(&usblp->mut)) { | |
928 | rc = -EINTR; | |
929 | break; | |
930 | } | |
931 | set_current_state(TASK_INTERRUPTIBLE); | |
932 | if ((rc = usblp_rtest(usblp, nonblock)) < 0) { | |
933 | mutex_unlock(&usblp->mut); | |
934 | break; | |
935 | } | |
936 | if (rc == 0) /* Keep it locked */ | |
937 | break; | |
938 | mutex_unlock(&usblp->mut); | |
939 | schedule(); | |
1da177e4 | 940 | } |
317c67b8 PZ |
941 | set_current_state(TASK_RUNNING); |
942 | remove_wait_queue(&usblp->rwait, &waita); | |
943 | return rc; | |
944 | } | |
1da177e4 | 945 | |
317c67b8 PZ |
946 | static int usblp_rtest(struct usblp *usblp, int nonblock) |
947 | { | |
948 | unsigned long flags; | |
1da177e4 | 949 | |
317c67b8 PZ |
950 | if (!usblp->present) |
951 | return -ENODEV; | |
952 | if (signal_pending(current)) | |
953 | return -EINTR; | |
954 | spin_lock_irqsave(&usblp->lock, flags); | |
955 | if (usblp->rcomplete) { | |
956 | spin_unlock_irqrestore(&usblp->lock, flags); | |
957 | return 0; | |
1da177e4 | 958 | } |
317c67b8 | 959 | spin_unlock_irqrestore(&usblp->lock, flags); |
317c67b8 PZ |
960 | if (nonblock) |
961 | return -EAGAIN; | |
962 | return 1; | |
963 | } | |
1da177e4 | 964 | |
317c67b8 PZ |
965 | /* |
966 | * Please check ->bidir and other such things outside for now. | |
967 | */ | |
968 | static int usblp_submit_read(struct usblp *usblp) | |
969 | { | |
970 | struct urb *urb; | |
971 | unsigned long flags; | |
972 | int rc; | |
973 | ||
974 | rc = -ENOMEM; | |
975 | if ((urb = usb_alloc_urb(0, GFP_KERNEL)) == NULL) | |
976 | goto raise_urb; | |
977 | ||
978 | usb_fill_bulk_urb(urb, usblp->dev, | |
979 | usb_rcvbulkpipe(usblp->dev, | |
980 | usblp->protocol[usblp->current_protocol].epread->bEndpointAddress), | |
981 | usblp->readbuf, USBLP_BUF_SIZE_IN, | |
982 | usblp_bulk_read, usblp); | |
983 | usb_anchor_urb(urb, &usblp->urbs); | |
984 | ||
985 | spin_lock_irqsave(&usblp->lock, flags); | |
986 | usblp->readcount = 0; /* XXX Why here? */ | |
987 | usblp->rcomplete = 0; | |
988 | spin_unlock_irqrestore(&usblp->lock, flags); | |
989 | if ((rc = usb_submit_urb(urb, GFP_KERNEL)) < 0) { | |
990 | dbg("error submitting urb (%d)", rc); | |
991 | spin_lock_irqsave(&usblp->lock, flags); | |
992 | usblp->rstatus = rc; | |
993 | usblp->rcomplete = 1; | |
994 | spin_unlock_irqrestore(&usblp->lock, flags); | |
995 | goto raise_submit; | |
1da177e4 LT |
996 | } |
997 | ||
317c67b8 PZ |
998 | return 0; |
999 | ||
1000 | raise_submit: | |
1001 | usb_unanchor_urb(urb); | |
1002 | usb_free_urb(urb); | |
1003 | raise_urb: | |
1004 | return rc; | |
1da177e4 LT |
1005 | } |
1006 | ||
1007 | /* | |
1008 | * Checks for printers that have quirks, such as requiring unidirectional | |
1009 | * communication but reporting bidirectional; currently some HP printers | |
1010 | * have this flaw (HP 810, 880, 895, etc.), or needing an init string | |
1011 | * sent at each open (like some Epsons). | |
1012 | * Returns 1 if found, 0 if not found. | |
1013 | * | |
1014 | * HP recommended that we use the bidirectional interface but | |
1015 | * don't attempt any bulk IN transfers from the IN endpoint. | |
1016 | * Here's some more detail on the problem: | |
1017 | * The problem is not that it isn't bidirectional though. The problem | |
1018 | * is that if you request a device ID, or status information, while | |
1019 | * the buffers are full, the return data will end up in the print data | |
1020 | * buffer. For example if you make sure you never request the device ID | |
1021 | * while you are sending print data, and you don't try to query the | |
1022 | * printer status every couple of milliseconds, you will probably be OK. | |
1023 | */ | |
916de027 | 1024 | static unsigned int usblp_quirks(__u16 vendor, __u16 product) |
1da177e4 LT |
1025 | { |
1026 | int i; | |
1027 | ||
1028 | for (i = 0; quirk_printers[i].vendorId; i++) { | |
1029 | if (vendor == quirk_printers[i].vendorId && | |
1030 | product == quirk_printers[i].productId) | |
1031 | return quirk_printers[i].quirks; | |
916de027 | 1032 | } |
1da177e4 LT |
1033 | return 0; |
1034 | } | |
1035 | ||
066202dd | 1036 | static const struct file_operations usblp_fops = { |
1da177e4 LT |
1037 | .owner = THIS_MODULE, |
1038 | .read = usblp_read, | |
1039 | .write = usblp_write, | |
1040 | .poll = usblp_poll, | |
318e479e PZ |
1041 | .unlocked_ioctl = usblp_ioctl, |
1042 | .compat_ioctl = usblp_ioctl, | |
1da177e4 LT |
1043 | .open = usblp_open, |
1044 | .release = usblp_release, | |
6038f373 | 1045 | .llseek = noop_llseek, |
1da177e4 LT |
1046 | }; |
1047 | ||
2c9ede55 | 1048 | static char *usblp_devnode(struct device *dev, umode_t *mode) |
f7a386c5 KS |
1049 | { |
1050 | return kasprintf(GFP_KERNEL, "usb/%s", dev_name(dev)); | |
1051 | } | |
1052 | ||
1da177e4 | 1053 | static struct usb_class_driver usblp_class = { |
d6e5bcf4 | 1054 | .name = "lp%d", |
e454cea2 | 1055 | .devnode = usblp_devnode, |
1da177e4 | 1056 | .fops = &usblp_fops, |
1da177e4 LT |
1057 | .minor_base = USBLP_MINOR_BASE, |
1058 | }; | |
1059 | ||
a9714c84 DW |
1060 | static ssize_t usblp_show_ieee1284_id(struct device *dev, struct device_attribute *attr, char *buf) |
1061 | { | |
1062 | struct usb_interface *intf = to_usb_interface(dev); | |
916de027 | 1063 | struct usblp *usblp = usb_get_intfdata(intf); |
a9714c84 DW |
1064 | |
1065 | if (usblp->device_id_string[0] == 0 && | |
1066 | usblp->device_id_string[1] == 0) | |
1067 | return 0; | |
1068 | ||
1069 | return sprintf(buf, "%s", usblp->device_id_string+2); | |
1070 | } | |
1071 | ||
1072 | static DEVICE_ATTR(ieee1284_id, S_IRUGO, usblp_show_ieee1284_id, NULL); | |
1073 | ||
1da177e4 LT |
1074 | static int usblp_probe(struct usb_interface *intf, |
1075 | const struct usb_device_id *id) | |
1076 | { | |
916de027 | 1077 | struct usb_device *dev = interface_to_usbdev(intf); |
49b707b9 | 1078 | struct usblp *usblp; |
1da177e4 LT |
1079 | int protocol; |
1080 | int retval; | |
1081 | ||
1082 | /* Malloc and start initializing usblp structure so we can use it | |
1083 | * directly. */ | |
49b707b9 JL |
1084 | usblp = kzalloc(sizeof(struct usblp), GFP_KERNEL); |
1085 | if (!usblp) { | |
317c67b8 | 1086 | retval = -ENOMEM; |
49b707b9 | 1087 | goto abort_ret; |
1da177e4 | 1088 | } |
1da177e4 | 1089 | usblp->dev = dev; |
317c67b8 | 1090 | mutex_init(&usblp->wmut); |
916de027 | 1091 | mutex_init(&usblp->mut); |
317c67b8 PZ |
1092 | spin_lock_init(&usblp->lock); |
1093 | init_waitqueue_head(&usblp->rwait); | |
1094 | init_waitqueue_head(&usblp->wwait); | |
1095 | init_usb_anchor(&usblp->urbs); | |
1da177e4 LT |
1096 | usblp->ifnum = intf->cur_altsetting->desc.bInterfaceNumber; |
1097 | usblp->intf = intf; | |
1098 | ||
1da177e4 LT |
1099 | /* Malloc device ID string buffer to the largest expected length, |
1100 | * since we can re-query it on an ioctl and a dynamic string | |
1101 | * could change in length. */ | |
1102 | if (!(usblp->device_id_string = kmalloc(USBLP_DEVICE_ID_SIZE, GFP_KERNEL))) { | |
317c67b8 | 1103 | retval = -ENOMEM; |
1da177e4 LT |
1104 | goto abort; |
1105 | } | |
1106 | ||
317c67b8 PZ |
1107 | /* |
1108 | * Allocate read buffer. We somewhat wastefully | |
1da177e4 | 1109 | * malloc both regardless of bidirectionality, because the |
317c67b8 PZ |
1110 | * alternate setting can be changed later via an ioctl. |
1111 | */ | |
1112 | if (!(usblp->readbuf = kmalloc(USBLP_BUF_SIZE_IN, GFP_KERNEL))) { | |
1113 | retval = -ENOMEM; | |
1da177e4 LT |
1114 | goto abort; |
1115 | } | |
1116 | ||
1117 | /* Allocate buffer for printer status */ | |
1118 | usblp->statusbuf = kmalloc(STATUS_BUF_SIZE, GFP_KERNEL); | |
1119 | if (!usblp->statusbuf) { | |
317c67b8 | 1120 | retval = -ENOMEM; |
1da177e4 LT |
1121 | goto abort; |
1122 | } | |
1123 | ||
1124 | /* Lookup quirks for this printer. */ | |
1125 | usblp->quirks = usblp_quirks( | |
1126 | le16_to_cpu(dev->descriptor.idVendor), | |
1127 | le16_to_cpu(dev->descriptor.idProduct)); | |
1128 | ||
1129 | /* Analyze and pick initial alternate settings and endpoints. */ | |
1130 | protocol = usblp_select_alts(usblp); | |
1131 | if (protocol < 0) { | |
1132 | dbg("incompatible printer-class device 0x%4.4X/0x%4.4X", | |
1133 | le16_to_cpu(dev->descriptor.idVendor), | |
1134 | le16_to_cpu(dev->descriptor.idProduct)); | |
317c67b8 | 1135 | retval = -ENODEV; |
1da177e4 LT |
1136 | goto abort; |
1137 | } | |
1138 | ||
1139 | /* Setup the selected alternate setting and endpoints. */ | |
317c67b8 PZ |
1140 | if (usblp_set_protocol(usblp, protocol) < 0) { |
1141 | retval = -ENODEV; /* ->probe isn't ->ioctl */ | |
1da177e4 | 1142 | goto abort; |
317c67b8 | 1143 | } |
1da177e4 LT |
1144 | |
1145 | /* Retrieve and store the device ID string. */ | |
1146 | usblp_cache_device_id_string(usblp); | |
96cede53 GKH |
1147 | retval = device_create_file(&intf->dev, &dev_attr_ieee1284_id); |
1148 | if (retval) | |
1149 | goto abort_intfdata; | |
1da177e4 LT |
1150 | |
1151 | #ifdef DEBUG | |
1152 | usblp_check_status(usblp, 0); | |
1153 | #endif | |
1154 | ||
916de027 | 1155 | usb_set_intfdata(intf, usblp); |
1da177e4 LT |
1156 | |
1157 | usblp->present = 1; | |
1158 | ||
1159 | retval = usb_register_dev(intf, &usblp_class); | |
1160 | if (retval) { | |
317c67b8 PZ |
1161 | printk(KERN_ERR "usblp: Not able to get a minor" |
1162 | " (base %u, slice default): %d\n", | |
1163 | USBLP_MINOR_BASE, retval); | |
1da177e4 LT |
1164 | goto abort_intfdata; |
1165 | } | |
1166 | usblp->minor = intf->minor; | |
317c67b8 PZ |
1167 | printk(KERN_INFO "usblp%d: USB %sdirectional printer dev %d " |
1168 | "if %d alt %d proto %d vid 0x%4.4X pid 0x%4.4X\n", | |
a9714c84 DW |
1169 | usblp->minor, usblp->bidir ? "Bi" : "Uni", dev->devnum, |
1170 | usblp->ifnum, | |
1171 | usblp->protocol[usblp->current_protocol].alt_setting, | |
1172 | usblp->current_protocol, | |
1173 | le16_to_cpu(usblp->dev->descriptor.idVendor), | |
1174 | le16_to_cpu(usblp->dev->descriptor.idProduct)); | |
1da177e4 LT |
1175 | |
1176 | return 0; | |
1177 | ||
1178 | abort_intfdata: | |
916de027 | 1179 | usb_set_intfdata(intf, NULL); |
a9714c84 | 1180 | device_remove_file(&intf->dev, &dev_attr_ieee1284_id); |
1da177e4 | 1181 | abort: |
49b707b9 JL |
1182 | kfree(usblp->readbuf); |
1183 | kfree(usblp->statusbuf); | |
1184 | kfree(usblp->device_id_string); | |
1185 | kfree(usblp); | |
1186 | abort_ret: | |
317c67b8 | 1187 | return retval; |
1da177e4 LT |
1188 | } |
1189 | ||
1190 | /* | |
1191 | * We are a "new" style driver with usb_device_id table, | |
1192 | * but our requirements are too intricate for simple match to handle. | |
1193 | * | |
1194 | * The "proto_bias" option may be used to specify the preferred protocol | |
1195 | * for all USB printers (1=7/1/1, 2=7/1/2, 3=7/1/3). If the device | |
1196 | * supports the preferred protocol, then we bind to it. | |
1197 | * | |
1198 | * The best interface for us is 7/1/2, because it is compatible | |
1199 | * with a stream of characters. If we find it, we bind to it. | |
1200 | * | |
1201 | * Note that the people from hpoj.sourceforge.net need to be able to | |
1202 | * bind to 7/1/3 (MLC/1284.4), so we provide them ioctls for this purpose. | |
1203 | * | |
1204 | * Failing 7/1/2, we look for 7/1/3, even though it's probably not | |
1205 | * stream-compatible, because this matches the behaviour of the old code. | |
1206 | * | |
1207 | * If nothing else, we bind to 7/1/1 - the unidirectional interface. | |
1208 | */ | |
1209 | static int usblp_select_alts(struct usblp *usblp) | |
1210 | { | |
1211 | struct usb_interface *if_alt; | |
1212 | struct usb_host_interface *ifd; | |
1213 | struct usb_endpoint_descriptor *epd, *epwrite, *epread; | |
1214 | int p, i, e; | |
1215 | ||
1216 | if_alt = usblp->intf; | |
1217 | ||
1218 | for (p = 0; p < USBLP_MAX_PROTOCOLS; p++) | |
1219 | usblp->protocol[p].alt_setting = -1; | |
1220 | ||
1221 | /* Find out what we have. */ | |
1222 | for (i = 0; i < if_alt->num_altsetting; i++) { | |
1223 | ifd = &if_alt->altsetting[i]; | |
1224 | ||
1225 | if (ifd->desc.bInterfaceClass != 7 || ifd->desc.bInterfaceSubClass != 1) | |
5ec71db5 AS |
1226 | if (!(usblp->quirks & USBLP_QUIRK_BAD_CLASS)) |
1227 | continue; | |
1da177e4 LT |
1228 | |
1229 | if (ifd->desc.bInterfaceProtocol < USBLP_FIRST_PROTOCOL || | |
1230 | ifd->desc.bInterfaceProtocol > USBLP_LAST_PROTOCOL) | |
1231 | continue; | |
1232 | ||
1233 | /* Look for bulk OUT and IN endpoints. */ | |
1234 | epwrite = epread = NULL; | |
1235 | for (e = 0; e < ifd->desc.bNumEndpoints; e++) { | |
1236 | epd = &ifd->endpoint[e].desc; | |
1237 | ||
5bc66d53 | 1238 | if (usb_endpoint_is_bulk_out(epd)) |
1da177e4 LT |
1239 | if (!epwrite) |
1240 | epwrite = epd; | |
1241 | ||
5bc66d53 | 1242 | if (usb_endpoint_is_bulk_in(epd)) |
1da177e4 LT |
1243 | if (!epread) |
1244 | epread = epd; | |
1da177e4 LT |
1245 | } |
1246 | ||
1247 | /* Ignore buggy hardware without the right endpoints. */ | |
1248 | if (!epwrite || (ifd->desc.bInterfaceProtocol > 1 && !epread)) | |
1249 | continue; | |
1250 | ||
1251 | /* Turn off reads for 7/1/1 (unidirectional) interfaces | |
1252 | * and buggy bidirectional printers. */ | |
1253 | if (ifd->desc.bInterfaceProtocol == 1) { | |
1254 | epread = NULL; | |
1255 | } else if (usblp->quirks & USBLP_QUIRK_BIDIR) { | |
317c67b8 PZ |
1256 | printk(KERN_INFO "usblp%d: Disabling reads from " |
1257 | "problematic bidirectional printer\n", | |
1258 | usblp->minor); | |
1da177e4 LT |
1259 | epread = NULL; |
1260 | } | |
1261 | ||
1262 | usblp->protocol[ifd->desc.bInterfaceProtocol].alt_setting = | |
1263 | ifd->desc.bAlternateSetting; | |
1264 | usblp->protocol[ifd->desc.bInterfaceProtocol].epwrite = epwrite; | |
1265 | usblp->protocol[ifd->desc.bInterfaceProtocol].epread = epread; | |
1266 | } | |
1267 | ||
1268 | /* If our requested protocol is supported, then use it. */ | |
1269 | if (proto_bias >= USBLP_FIRST_PROTOCOL && | |
1270 | proto_bias <= USBLP_LAST_PROTOCOL && | |
1271 | usblp->protocol[proto_bias].alt_setting != -1) | |
1272 | return proto_bias; | |
1273 | ||
1274 | /* Ordering is important here. */ | |
1275 | if (usblp->protocol[2].alt_setting != -1) | |
1276 | return 2; | |
1277 | if (usblp->protocol[1].alt_setting != -1) | |
1278 | return 1; | |
1279 | if (usblp->protocol[3].alt_setting != -1) | |
1280 | return 3; | |
1281 | ||
1282 | /* If nothing is available, then don't bind to this device. */ | |
1283 | return -1; | |
1284 | } | |
1285 | ||
1286 | static int usblp_set_protocol(struct usblp *usblp, int protocol) | |
1287 | { | |
1288 | int r, alts; | |
1289 | ||
1290 | if (protocol < USBLP_FIRST_PROTOCOL || protocol > USBLP_LAST_PROTOCOL) | |
1291 | return -EINVAL; | |
1292 | ||
1293 | alts = usblp->protocol[protocol].alt_setting; | |
1294 | if (alts < 0) | |
1295 | return -EINVAL; | |
1296 | r = usb_set_interface(usblp->dev, usblp->ifnum, alts); | |
1297 | if (r < 0) { | |
317c67b8 | 1298 | printk(KERN_ERR "usblp: can't set desired altsetting %d on interface %d\n", |
1da177e4 LT |
1299 | alts, usblp->ifnum); |
1300 | return r; | |
1301 | } | |
1302 | ||
1da177e4 | 1303 | usblp->bidir = (usblp->protocol[protocol].epread != NULL); |
1da177e4 LT |
1304 | usblp->current_protocol = protocol; |
1305 | dbg("usblp%d set protocol %d", usblp->minor, protocol); | |
1306 | return 0; | |
1307 | } | |
1308 | ||
1309 | /* Retrieves and caches device ID string. | |
1310 | * Returns length, including length bytes but not null terminator. | |
1311 | * On error, returns a negative errno value. */ | |
1312 | static int usblp_cache_device_id_string(struct usblp *usblp) | |
1313 | { | |
1314 | int err, length; | |
1315 | ||
1316 | err = usblp_get_id(usblp, 0, usblp->device_id_string, USBLP_DEVICE_ID_SIZE - 1); | |
1317 | if (err < 0) { | |
1318 | dbg("usblp%d: error = %d reading IEEE-1284 Device ID string", | |
1319 | usblp->minor, err); | |
1320 | usblp->device_id_string[0] = usblp->device_id_string[1] = '\0'; | |
1321 | return -EIO; | |
1322 | } | |
1323 | ||
1324 | /* First two bytes are length in big-endian. | |
1325 | * They count themselves, and we copy them into | |
1326 | * the user's buffer. */ | |
1327 | length = be16_to_cpu(*((__be16 *)usblp->device_id_string)); | |
1328 | if (length < 2) | |
1329 | length = 2; | |
1330 | else if (length >= USBLP_DEVICE_ID_SIZE) | |
1331 | length = USBLP_DEVICE_ID_SIZE - 1; | |
1332 | usblp->device_id_string[length] = '\0'; | |
1333 | ||
1334 | dbg("usblp%d Device ID string [len=%d]=\"%s\"", | |
1335 | usblp->minor, length, &usblp->device_id_string[2]); | |
1336 | ||
1337 | return length; | |
1338 | } | |
1339 | ||
1340 | static void usblp_disconnect(struct usb_interface *intf) | |
1341 | { | |
916de027 | 1342 | struct usblp *usblp = usb_get_intfdata(intf); |
1da177e4 LT |
1343 | |
1344 | usb_deregister_dev(intf, &usblp_class); | |
1345 | ||
1346 | if (!usblp || !usblp->dev) { | |
9908a32e | 1347 | dev_err(&intf->dev, "bogus disconnect\n"); |
916de027 | 1348 | BUG(); |
1da177e4 LT |
1349 | } |
1350 | ||
a9714c84 DW |
1351 | device_remove_file(&intf->dev, &dev_attr_ieee1284_id); |
1352 | ||
916de027 NK |
1353 | mutex_lock(&usblp_mutex); |
1354 | mutex_lock(&usblp->mut); | |
1da177e4 | 1355 | usblp->present = 0; |
317c67b8 PZ |
1356 | wake_up(&usblp->wwait); |
1357 | wake_up(&usblp->rwait); | |
916de027 | 1358 | usb_set_intfdata(intf, NULL); |
1da177e4 LT |
1359 | |
1360 | usblp_unlink_urbs(usblp); | |
916de027 | 1361 | mutex_unlock(&usblp->mut); |
1da177e4 LT |
1362 | |
1363 | if (!usblp->used) | |
916de027 NK |
1364 | usblp_cleanup(usblp); |
1365 | mutex_unlock(&usblp_mutex); | |
1da177e4 LT |
1366 | } |
1367 | ||
3a90f818 | 1368 | static int usblp_suspend(struct usb_interface *intf, pm_message_t message) |
516077c1 | 1369 | { |
916de027 | 1370 | struct usblp *usblp = usb_get_intfdata(intf); |
516077c1 | 1371 | |
516077c1 | 1372 | usblp_unlink_urbs(usblp); |
317c67b8 PZ |
1373 | #if 0 /* XXX Do we want this? What if someone is reading, should we fail? */ |
1374 | /* not strictly necessary, but just in case */ | |
1375 | wake_up(&usblp->wwait); | |
1376 | wake_up(&usblp->rwait); | |
1377 | #endif | |
516077c1 ON |
1378 | |
1379 | return 0; | |
1380 | } | |
1381 | ||
3a90f818 | 1382 | static int usblp_resume(struct usb_interface *intf) |
516077c1 | 1383 | { |
916de027 | 1384 | struct usblp *usblp = usb_get_intfdata(intf); |
516077c1 ON |
1385 | int r; |
1386 | ||
916de027 | 1387 | r = handle_bidir(usblp); |
516077c1 | 1388 | |
516077c1 ON |
1389 | return r; |
1390 | } | |
1391 | ||
6ef4852b | 1392 | static const struct usb_device_id usblp_ids[] = { |
1da177e4 LT |
1393 | { USB_DEVICE_INFO(7, 1, 1) }, |
1394 | { USB_DEVICE_INFO(7, 1, 2) }, | |
1395 | { USB_DEVICE_INFO(7, 1, 3) }, | |
1396 | { USB_INTERFACE_INFO(7, 1, 1) }, | |
1397 | { USB_INTERFACE_INFO(7, 1, 2) }, | |
1398 | { USB_INTERFACE_INFO(7, 1, 3) }, | |
5ec71db5 | 1399 | { USB_DEVICE(0x04b8, 0x0202) }, /* Seiko Epson Receipt Printer M129C */ |
1da177e4 LT |
1400 | { } /* Terminating entry */ |
1401 | }; | |
1402 | ||
916de027 | 1403 | MODULE_DEVICE_TABLE(usb, usblp_ids); |
1da177e4 LT |
1404 | |
1405 | static struct usb_driver usblp_driver = { | |
1da177e4 LT |
1406 | .name = "usblp", |
1407 | .probe = usblp_probe, | |
1408 | .disconnect = usblp_disconnect, | |
516077c1 ON |
1409 | .suspend = usblp_suspend, |
1410 | .resume = usblp_resume, | |
1da177e4 | 1411 | .id_table = usblp_ids, |
d0532184 | 1412 | .supports_autosuspend = 1, |
1da177e4 LT |
1413 | }; |
1414 | ||
1415 | static int __init usblp_init(void) | |
1416 | { | |
317c67b8 | 1417 | return usb_register(&usblp_driver); |
1da177e4 LT |
1418 | } |
1419 | ||
1420 | static void __exit usblp_exit(void) | |
1421 | { | |
1422 | usb_deregister(&usblp_driver); | |
1423 | } | |
1424 | ||
1425 | module_init(usblp_init); | |
1426 | module_exit(usblp_exit); | |
1427 | ||
916de027 NK |
1428 | MODULE_AUTHOR(DRIVER_AUTHOR); |
1429 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1da177e4 LT |
1430 | module_param(proto_bias, int, S_IRUGO | S_IWUSR); |
1431 | MODULE_PARM_DESC(proto_bias, "Favourite protocol number"); | |
1432 | MODULE_LICENSE("GPL"); |