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> | |
1da177e4 LT |
55 | #include <linux/slab.h> |
56 | #include <linux/lp.h> | |
4186ecf8 | 57 | #include <linux/mutex.h> |
1da177e4 LT |
58 | #undef DEBUG |
59 | #include <linux/usb.h> | |
305e7be5 | 60 | #include <linux/ratelimit.h> |
1da177e4 LT |
61 | |
62 | /* | |
63 | * Version Information | |
64 | */ | |
1da177e4 LT |
65 | #define DRIVER_AUTHOR "Michael Gee, Pavel Machek, Vojtech Pavlik, Randy Dunlap, Pete Zaitcev, David Paschal" |
66 | #define DRIVER_DESC "USB Printer Device Class driver" | |
67 | ||
68 | #define USBLP_BUF_SIZE 8192 | |
317c67b8 | 69 | #define USBLP_BUF_SIZE_IN 1024 |
1da177e4 LT |
70 | #define USBLP_DEVICE_ID_SIZE 1024 |
71 | ||
72 | /* ioctls: */ | |
1da177e4 LT |
73 | #define IOCNR_GET_DEVICE_ID 1 |
74 | #define IOCNR_GET_PROTOCOLS 2 | |
75 | #define IOCNR_SET_PROTOCOL 3 | |
76 | #define IOCNR_HP_SET_CHANNEL 4 | |
77 | #define IOCNR_GET_BUS_ADDRESS 5 | |
78 | #define IOCNR_GET_VID_PID 6 | |
79 | #define IOCNR_SOFT_RESET 7 | |
80 | /* Get device_id string: */ | |
81 | #define LPIOC_GET_DEVICE_ID(len) _IOC(_IOC_READ, 'P', IOCNR_GET_DEVICE_ID, len) | |
82 | /* The following ioctls were added for http://hpoj.sourceforge.net: */ | |
83 | /* Get two-int array: | |
84 | * [0]=current protocol (1=7/1/1, 2=7/1/2, 3=7/1/3), | |
85 | * [1]=supported protocol mask (mask&(1<<n)!=0 means 7/1/n supported): */ | |
86 | #define LPIOC_GET_PROTOCOLS(len) _IOC(_IOC_READ, 'P', IOCNR_GET_PROTOCOLS, len) | |
87 | /* Set protocol (arg: 1=7/1/1, 2=7/1/2, 3=7/1/3): */ | |
88 | #define LPIOC_SET_PROTOCOL _IOC(_IOC_WRITE, 'P', IOCNR_SET_PROTOCOL, 0) | |
89 | /* Set channel number (HP Vendor-specific command): */ | |
90 | #define LPIOC_HP_SET_CHANNEL _IOC(_IOC_WRITE, 'P', IOCNR_HP_SET_CHANNEL, 0) | |
91 | /* Get two-int array: [0]=bus number, [1]=device address: */ | |
92 | #define LPIOC_GET_BUS_ADDRESS(len) _IOC(_IOC_READ, 'P', IOCNR_GET_BUS_ADDRESS, len) | |
93 | /* Get two-int array: [0]=vendor ID, [1]=product ID: */ | |
94 | #define LPIOC_GET_VID_PID(len) _IOC(_IOC_READ, 'P', IOCNR_GET_VID_PID, len) | |
95 | /* Perform class specific soft reset */ | |
96 | #define LPIOC_SOFT_RESET _IOC(_IOC_NONE, 'P', IOCNR_SOFT_RESET, 0); | |
97 | ||
98 | /* | |
99 | * A DEVICE_ID string may include the printer's serial number. | |
100 | * It should end with a semi-colon (';'). | |
101 | * An example from an HP 970C DeskJet printer is (this is one long string, | |
102 | * with the serial number changed): | |
103 | MFG:HEWLETT-PACKARD;MDL:DESKJET 970C;CMD:MLC,PCL,PML;CLASS:PRINTER;DESCRIPTION:Hewlett-Packard DeskJet 970C;SERN:US970CSEPROF;VSTATUS:$HB0$NC0,ff,DN,IDLE,CUT,K1,C0,DP,NR,KP000,CP027;VP:0800,FL,B0;VJ: ; | |
104 | */ | |
105 | ||
106 | /* | |
107 | * USB Printer Requests | |
108 | */ | |
109 | ||
110 | #define USBLP_REQ_GET_ID 0x00 | |
111 | #define USBLP_REQ_GET_STATUS 0x01 | |
112 | #define USBLP_REQ_RESET 0x02 | |
113 | #define USBLP_REQ_HP_CHANNEL_CHANGE_REQUEST 0x00 /* HP Vendor-specific */ | |
114 | ||
115 | #define USBLP_MINORS 16 | |
116 | #define USBLP_MINOR_BASE 0 | |
117 | ||
283face8 | 118 | #define USBLP_CTL_TIMEOUT 5000 /* 5 seconds */ |
1da177e4 LT |
119 | |
120 | #define USBLP_FIRST_PROTOCOL 1 | |
121 | #define USBLP_LAST_PROTOCOL 3 | |
122 | #define USBLP_MAX_PROTOCOLS (USBLP_LAST_PROTOCOL+1) | |
123 | ||
124 | /* | |
125 | * some arbitrary status buffer size; | |
126 | * need a status buffer that is allocated via kmalloc(), not on stack | |
127 | */ | |
128 | #define STATUS_BUF_SIZE 8 | |
129 | ||
317c67b8 PZ |
130 | /* |
131 | * Locks down the locking order: | |
132 | * ->wmut locks wstatus. | |
133 | * ->mut locks the whole usblp, except [rw]complete, and thus, by indirection, | |
134 | * [rw]status. We only touch status when we know the side idle. | |
135 | * ->lock locks what interrupt accesses. | |
136 | */ | |
1da177e4 | 137 | struct usblp { |
916de027 | 138 | struct usb_device *dev; /* USB device */ |
317c67b8 PZ |
139 | struct mutex wmut; |
140 | struct mutex mut; | |
141 | spinlock_t lock; /* locks rcomplete, wcomplete */ | |
1da177e4 LT |
142 | char *readbuf; /* read transfer_buffer */ |
143 | char *statusbuf; /* status transfer_buffer */ | |
317c67b8 PZ |
144 | struct usb_anchor urbs; |
145 | wait_queue_head_t rwait, wwait; | |
1da177e4 LT |
146 | int readcount; /* Counter for reads */ |
147 | int ifnum; /* Interface number */ | |
148 | struct usb_interface *intf; /* The interface */ | |
149 | /* Alternate-setting numbers and endpoints for each protocol | |
150 | * (7/1/{index=1,2,3}) that the device supports: */ | |
151 | struct { | |
152 | int alt_setting; | |
153 | struct usb_endpoint_descriptor *epwrite; | |
154 | struct usb_endpoint_descriptor *epread; | |
155 | } protocol[USBLP_MAX_PROTOCOLS]; | |
156 | int current_protocol; | |
157 | int minor; /* minor number of device */ | |
317c67b8 PZ |
158 | int wcomplete, rcomplete; |
159 | int wstatus; /* bytes written or error */ | |
160 | int rstatus; /* bytes ready or error */ | |
1da177e4 | 161 | unsigned int quirks; /* quirks flags */ |
7f477358 | 162 | unsigned int flags; /* mode flags */ |
1da177e4 LT |
163 | unsigned char used; /* True if open */ |
164 | unsigned char present; /* True if not disconnected */ | |
165 | unsigned char bidir; /* interface is bidirectional */ | |
7f477358 | 166 | unsigned char no_paper; /* Paper Out happened */ |
1da177e4 LT |
167 | unsigned char *device_id_string; /* IEEE 1284 DEVICE ID string (ptr) */ |
168 | /* first 2 bytes are (big-endian) length */ | |
169 | }; | |
170 | ||
171 | #ifdef DEBUG | |
916de027 NK |
172 | static void usblp_dump(struct usblp *usblp) |
173 | { | |
4f306309 | 174 | struct device *dev = &usblp->intf->dev; |
1da177e4 LT |
175 | int p; |
176 | ||
4f306309 GKH |
177 | dev_dbg(dev, "usblp=0x%p\n", usblp); |
178 | dev_dbg(dev, "dev=0x%p\n", usblp->dev); | |
179 | dev_dbg(dev, "present=%d\n", usblp->present); | |
180 | dev_dbg(dev, "readbuf=0x%p\n", usblp->readbuf); | |
181 | dev_dbg(dev, "readcount=%d\n", usblp->readcount); | |
182 | dev_dbg(dev, "ifnum=%d\n", usblp->ifnum); | |
183 | for (p = USBLP_FIRST_PROTOCOL; p <= USBLP_LAST_PROTOCOL; p++) { | |
184 | dev_dbg(dev, "protocol[%d].alt_setting=%d\n", p, | |
185 | usblp->protocol[p].alt_setting); | |
186 | dev_dbg(dev, "protocol[%d].epwrite=%p\n", p, | |
187 | usblp->protocol[p].epwrite); | |
188 | dev_dbg(dev, "protocol[%d].epread=%p\n", p, | |
189 | usblp->protocol[p].epread); | |
190 | } | |
191 | dev_dbg(dev, "current_protocol=%d\n", usblp->current_protocol); | |
192 | dev_dbg(dev, "minor=%d\n", usblp->minor); | |
193 | dev_dbg(dev, "wstatus=%d\n", usblp->wstatus); | |
194 | dev_dbg(dev, "rstatus=%d\n", usblp->rstatus); | |
195 | dev_dbg(dev, "quirks=%d\n", usblp->quirks); | |
196 | dev_dbg(dev, "used=%d\n", usblp->used); | |
197 | dev_dbg(dev, "bidir=%d\n", usblp->bidir); | |
198 | dev_dbg(dev, "device_id_string=\"%s\"\n", | |
1da177e4 LT |
199 | usblp->device_id_string ? |
200 | usblp->device_id_string + 2 : | |
201 | (unsigned char *)"(null)"); | |
202 | } | |
203 | #endif | |
204 | ||
205 | /* Quirks: various printer quirks are handled by this table & its flags. */ | |
206 | ||
207 | struct quirk_printer_struct { | |
208 | __u16 vendorId; | |
209 | __u16 productId; | |
210 | unsigned int quirks; | |
211 | }; | |
212 | ||
213 | #define USBLP_QUIRK_BIDIR 0x1 /* reports bidir but requires unidirectional mode (no INs/reads) */ | |
214 | #define USBLP_QUIRK_USB_INIT 0x2 /* needs vendor USB init string */ | |
5ec71db5 | 215 | #define USBLP_QUIRK_BAD_CLASS 0x4 /* descriptor uses vendor-specific Class or SubClass */ |
1da177e4 | 216 | |
4c4c9432 | 217 | static const struct quirk_printer_struct quirk_printers[] = { |
1da177e4 LT |
218 | { 0x03f0, 0x0004, USBLP_QUIRK_BIDIR }, /* HP DeskJet 895C */ |
219 | { 0x03f0, 0x0104, USBLP_QUIRK_BIDIR }, /* HP DeskJet 880C */ | |
220 | { 0x03f0, 0x0204, USBLP_QUIRK_BIDIR }, /* HP DeskJet 815C */ | |
221 | { 0x03f0, 0x0304, USBLP_QUIRK_BIDIR }, /* HP DeskJet 810C/812C */ | |
222 | { 0x03f0, 0x0404, USBLP_QUIRK_BIDIR }, /* HP DeskJet 830C */ | |
223 | { 0x03f0, 0x0504, USBLP_QUIRK_BIDIR }, /* HP DeskJet 885C */ | |
916de027 NK |
224 | { 0x03f0, 0x0604, USBLP_QUIRK_BIDIR }, /* HP DeskJet 840C */ |
225 | { 0x03f0, 0x0804, USBLP_QUIRK_BIDIR }, /* HP DeskJet 816C */ | |
1da177e4 LT |
226 | { 0x03f0, 0x1104, USBLP_QUIRK_BIDIR }, /* HP Deskjet 959C */ |
227 | { 0x0409, 0xefbe, USBLP_QUIRK_BIDIR }, /* NEC Picty900 (HP OEM) */ | |
228 | { 0x0409, 0xbef4, USBLP_QUIRK_BIDIR }, /* NEC Picty760 (HP OEM) */ | |
229 | { 0x0409, 0xf0be, USBLP_QUIRK_BIDIR }, /* NEC Picty920 (HP OEM) */ | |
230 | { 0x0409, 0xf1be, USBLP_QUIRK_BIDIR }, /* NEC Picty800 (HP OEM) */ | |
4f45d038 | 231 | { 0x0482, 0x0010, USBLP_QUIRK_BIDIR }, /* Kyocera Mita FS 820, by zut <kernel@zut.de> */ |
06a743bf | 232 | { 0x04f9, 0x000d, USBLP_QUIRK_BIDIR }, /* Brother Industries, Ltd HL-1440 Laser Printer */ |
5ec71db5 | 233 | { 0x04b8, 0x0202, USBLP_QUIRK_BAD_CLASS }, /* Seiko Epson Receipt Printer M129C */ |
1da177e4 LT |
234 | { 0, 0 } |
235 | }; | |
236 | ||
317c67b8 PZ |
237 | static int usblp_wwait(struct usblp *usblp, int nonblock); |
238 | static int usblp_wtest(struct usblp *usblp, int nonblock); | |
239 | static int usblp_rwait_and_lock(struct usblp *usblp, int nonblock); | |
240 | static int usblp_rtest(struct usblp *usblp, int nonblock); | |
241 | static int usblp_submit_read(struct usblp *usblp); | |
1da177e4 LT |
242 | static int usblp_select_alts(struct usblp *usblp); |
243 | static int usblp_set_protocol(struct usblp *usblp, int protocol); | |
244 | static int usblp_cache_device_id_string(struct usblp *usblp); | |
245 | ||
246 | /* forward reference to make our lives easier */ | |
247 | static struct usb_driver usblp_driver; | |
4186ecf8 | 248 | static DEFINE_MUTEX(usblp_mutex); /* locks the existence of usblp's */ |
1da177e4 LT |
249 | |
250 | /* | |
251 | * Functions for usblp control messages. | |
252 | */ | |
253 | ||
254 | static int usblp_ctrl_msg(struct usblp *usblp, int request, int type, int dir, int recip, int value, void *buf, int len) | |
255 | { | |
256 | int retval; | |
257 | int index = usblp->ifnum; | |
258 | ||
259 | /* High byte has the interface index. | |
260 | Low byte has the alternate setting. | |
261 | */ | |
916de027 NK |
262 | if ((request == USBLP_REQ_GET_ID) && (type == USB_TYPE_CLASS)) |
263 | index = (usblp->ifnum<<8)|usblp->protocol[usblp->current_protocol].alt_setting; | |
1da177e4 LT |
264 | |
265 | retval = usb_control_msg(usblp->dev, | |
266 | dir ? usb_rcvctrlpipe(usblp->dev, 0) : usb_sndctrlpipe(usblp->dev, 0), | |
283face8 | 267 | request, type | dir | recip, value, index, buf, len, USBLP_CTL_TIMEOUT); |
4f306309 GKH |
268 | dev_dbg(&usblp->intf->dev, |
269 | "usblp_control_msg: rq: 0x%02x dir: %d recip: %d value: %d idx: %d len: %#x result: %d\n", | |
1da177e4 LT |
270 | request, !!dir, recip, value, index, len, retval); |
271 | return retval < 0 ? retval : 0; | |
272 | } | |
273 | ||
274 | #define usblp_read_status(usblp, status)\ | |
275 | usblp_ctrl_msg(usblp, USBLP_REQ_GET_STATUS, USB_TYPE_CLASS, USB_DIR_IN, USB_RECIP_INTERFACE, 0, status, 1) | |
276 | #define usblp_get_id(usblp, config, id, maxlen)\ | |
277 | usblp_ctrl_msg(usblp, USBLP_REQ_GET_ID, USB_TYPE_CLASS, USB_DIR_IN, USB_RECIP_INTERFACE, config, id, maxlen) | |
278 | #define usblp_reset(usblp)\ | |
279 | usblp_ctrl_msg(usblp, USBLP_REQ_RESET, USB_TYPE_CLASS, USB_DIR_OUT, USB_RECIP_OTHER, 0, NULL, 0) | |
280 | ||
281 | #define usblp_hp_channel_change_request(usblp, channel, buffer) \ | |
282 | usblp_ctrl_msg(usblp, USBLP_REQ_HP_CHANNEL_CHANGE_REQUEST, USB_TYPE_VENDOR, USB_DIR_IN, USB_RECIP_INTERFACE, channel, buffer, 1) | |
283 | ||
284 | /* | |
285 | * See the description for usblp_select_alts() below for the usage | |
286 | * explanation. Look into your /proc/bus/usb/devices and dmesg in | |
287 | * case of any trouble. | |
288 | */ | |
289 | static int proto_bias = -1; | |
290 | ||
291 | /* | |
292 | * URB callback. | |
293 | */ | |
294 | ||
7d12e780 | 295 | static void usblp_bulk_read(struct urb *urb) |
1da177e4 LT |
296 | { |
297 | struct usblp *usblp = urb->context; | |
18ac3016 | 298 | int status = urb->status; |
1da177e4 | 299 | |
317c67b8 | 300 | if (usblp->present && usblp->used) { |
18ac3016 | 301 | if (status) |
317c67b8 PZ |
302 | printk(KERN_WARNING "usblp%d: " |
303 | "nonzero read bulk status received: %d\n", | |
18ac3016 | 304 | usblp->minor, status); |
317c67b8 PZ |
305 | } |
306 | spin_lock(&usblp->lock); | |
18ac3016 GKH |
307 | if (status < 0) |
308 | usblp->rstatus = status; | |
317c67b8 PZ |
309 | else |
310 | usblp->rstatus = urb->actual_length; | |
1da177e4 | 311 | usblp->rcomplete = 1; |
317c67b8 PZ |
312 | wake_up(&usblp->rwait); |
313 | spin_unlock(&usblp->lock); | |
314 | ||
315 | usb_free_urb(urb); | |
1da177e4 LT |
316 | } |
317 | ||
7d12e780 | 318 | static void usblp_bulk_write(struct urb *urb) |
1da177e4 LT |
319 | { |
320 | struct usblp *usblp = urb->context; | |
18ac3016 | 321 | int status = urb->status; |
1da177e4 | 322 | |
317c67b8 | 323 | if (usblp->present && usblp->used) { |
18ac3016 | 324 | if (status) |
317c67b8 PZ |
325 | printk(KERN_WARNING "usblp%d: " |
326 | "nonzero write bulk status received: %d\n", | |
18ac3016 | 327 | usblp->minor, status); |
317c67b8 PZ |
328 | } |
329 | spin_lock(&usblp->lock); | |
18ac3016 GKH |
330 | if (status < 0) |
331 | usblp->wstatus = status; | |
317c67b8 PZ |
332 | else |
333 | usblp->wstatus = urb->actual_length; | |
7f477358 | 334 | usblp->no_paper = 0; |
1da177e4 | 335 | usblp->wcomplete = 1; |
317c67b8 PZ |
336 | wake_up(&usblp->wwait); |
337 | spin_unlock(&usblp->lock); | |
338 | ||
317c67b8 | 339 | usb_free_urb(urb); |
1da177e4 LT |
340 | } |
341 | ||
342 | /* | |
343 | * Get and print printer errors. | |
344 | */ | |
345 | ||
4c4c9432 | 346 | static const char *usblp_messages[] = { "ok", "out of paper", "off-line", "on fire" }; |
1da177e4 LT |
347 | |
348 | static int usblp_check_status(struct usblp *usblp, int err) | |
349 | { | |
350 | unsigned char status, newerr = 0; | |
351 | int error; | |
352 | ||
fc401e69 PZ |
353 | mutex_lock(&usblp->mut); |
354 | if ((error = usblp_read_status(usblp, usblp->statusbuf)) < 0) { | |
355 | mutex_unlock(&usblp->mut); | |
305e7be5 | 356 | printk_ratelimited(KERN_ERR |
317c67b8 | 357 | "usblp%d: error %d reading printer status\n", |
0bc8e009 | 358 | usblp->minor, error); |
1da177e4 LT |
359 | return 0; |
360 | } | |
1da177e4 | 361 | status = *usblp->statusbuf; |
fc401e69 | 362 | mutex_unlock(&usblp->mut); |
1da177e4 LT |
363 | |
364 | if (~status & LP_PERRORP) | |
365 | newerr = 3; | |
366 | if (status & LP_POUTPA) | |
367 | newerr = 1; | |
368 | if (~status & LP_PSELECD) | |
369 | newerr = 2; | |
370 | ||
317c67b8 PZ |
371 | if (newerr != err) { |
372 | printk(KERN_INFO "usblp%d: %s\n", | |
373 | usblp->minor, usblp_messages[newerr]); | |
374 | } | |
1da177e4 LT |
375 | |
376 | return newerr; | |
377 | } | |
378 | ||
916de027 | 379 | static int handle_bidir(struct usblp *usblp) |
516077c1 | 380 | { |
3a90f818 | 381 | if (usblp->bidir && usblp->used) { |
317c67b8 | 382 | if (usblp_submit_read(usblp) < 0) |
516077c1 | 383 | return -EIO; |
516077c1 | 384 | } |
516077c1 ON |
385 | return 0; |
386 | } | |
387 | ||
1da177e4 LT |
388 | /* |
389 | * File op functions. | |
390 | */ | |
391 | ||
392 | static int usblp_open(struct inode *inode, struct file *file) | |
393 | { | |
394 | int minor = iminor(inode); | |
395 | struct usblp *usblp; | |
396 | struct usb_interface *intf; | |
397 | int retval; | |
398 | ||
399 | if (minor < 0) | |
400 | return -ENODEV; | |
401 | ||
916de027 | 402 | mutex_lock(&usblp_mutex); |
1da177e4 LT |
403 | |
404 | retval = -ENODEV; | |
405 | intf = usb_find_interface(&usblp_driver, minor); | |
916de027 | 406 | if (!intf) |
1da177e4 | 407 | goto out; |
916de027 | 408 | usblp = usb_get_intfdata(intf); |
1da177e4 LT |
409 | if (!usblp || !usblp->dev || !usblp->present) |
410 | goto out; | |
411 | ||
412 | retval = -EBUSY; | |
413 | if (usblp->used) | |
414 | goto out; | |
415 | ||
416 | /* | |
7f477358 PZ |
417 | * We do not implement LP_ABORTOPEN/LPABORTOPEN for two reasons: |
418 | * - We do not want persistent state which close(2) does not clear | |
419 | * - It is not used anyway, according to CUPS people | |
1da177e4 | 420 | */ |
1da177e4 | 421 | |
d0532184 ON |
422 | retval = usb_autopm_get_interface(intf); |
423 | if (retval < 0) | |
424 | goto out; | |
1da177e4 LT |
425 | usblp->used = 1; |
426 | file->private_data = usblp; | |
427 | ||
1da177e4 | 428 | usblp->wcomplete = 1; /* we begin writeable */ |
317c67b8 | 429 | usblp->wstatus = 0; |
1da177e4 LT |
430 | usblp->rcomplete = 0; |
431 | ||
516077c1 | 432 | if (handle_bidir(usblp) < 0) { |
19028690 | 433 | usb_autopm_put_interface(intf); |
97cb95d1 | 434 | usblp->used = 0; |
516077c1 ON |
435 | file->private_data = NULL; |
436 | retval = -EIO; | |
1da177e4 LT |
437 | } |
438 | out: | |
916de027 | 439 | mutex_unlock(&usblp_mutex); |
1da177e4 LT |
440 | return retval; |
441 | } | |
442 | ||
916de027 | 443 | static void usblp_cleanup(struct usblp *usblp) |
1da177e4 | 444 | { |
317c67b8 | 445 | printk(KERN_INFO "usblp%d: removed\n", usblp->minor); |
1da177e4 | 446 | |
317c67b8 | 447 | kfree(usblp->readbuf); |
916de027 NK |
448 | kfree(usblp->device_id_string); |
449 | kfree(usblp->statusbuf); | |
450 | kfree(usblp); | |
1da177e4 LT |
451 | } |
452 | ||
453 | static void usblp_unlink_urbs(struct usblp *usblp) | |
454 | { | |
317c67b8 | 455 | usb_kill_anchored_urbs(&usblp->urbs); |
1da177e4 LT |
456 | } |
457 | ||
458 | static int usblp_release(struct inode *inode, struct file *file) | |
459 | { | |
460 | struct usblp *usblp = file->private_data; | |
461 | ||
7f477358 PZ |
462 | usblp->flags &= ~LP_ABORT; |
463 | ||
916de027 | 464 | mutex_lock(&usblp_mutex); |
1da177e4 LT |
465 | usblp->used = 0; |
466 | if (usblp->present) { | |
467 | usblp_unlink_urbs(usblp); | |
d0532184 | 468 | usb_autopm_put_interface(usblp->intf); |
916de027 NK |
469 | } else /* finish cleanup from disconnect */ |
470 | usblp_cleanup(usblp); | |
471 | mutex_unlock(&usblp_mutex); | |
1da177e4 LT |
472 | return 0; |
473 | } | |
474 | ||
475 | /* No kernel lock - fine */ | |
476 | static unsigned int usblp_poll(struct file *file, struct poll_table_struct *wait) | |
477 | { | |
317c67b8 PZ |
478 | int ret; |
479 | unsigned long flags; | |
480 | ||
1da177e4 | 481 | struct usblp *usblp = file->private_data; |
317c67b8 PZ |
482 | /* Should we check file->f_mode & FMODE_WRITE before poll_wait()? */ |
483 | poll_wait(file, &usblp->rwait, wait); | |
484 | poll_wait(file, &usblp->wwait, wait); | |
485 | spin_lock_irqsave(&usblp->lock, flags); | |
283face8 PZ |
486 | ret = ((usblp->bidir && usblp->rcomplete) ? POLLIN | POLLRDNORM : 0) | |
487 | ((usblp->no_paper || usblp->wcomplete) ? POLLOUT | POLLWRNORM : 0); | |
317c67b8 PZ |
488 | spin_unlock_irqrestore(&usblp->lock, flags); |
489 | return ret; | |
1da177e4 LT |
490 | } |
491 | ||
318e479e | 492 | static long usblp_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
1da177e4 LT |
493 | { |
494 | struct usblp *usblp = file->private_data; | |
495 | int length, err, i; | |
496 | unsigned char newChannel; | |
497 | int status; | |
498 | int twoints[2]; | |
499 | int retval = 0; | |
500 | ||
916de027 | 501 | mutex_lock(&usblp->mut); |
1da177e4 LT |
502 | if (!usblp->present) { |
503 | retval = -ENODEV; | |
504 | goto done; | |
505 | } | |
506 | ||
4f306309 GKH |
507 | dev_dbg(&usblp->intf->dev, |
508 | "usblp_ioctl: cmd=0x%x (%c nr=%d len=%d dir=%d)\n", cmd, | |
509 | _IOC_TYPE(cmd), _IOC_NR(cmd), _IOC_SIZE(cmd), _IOC_DIR(cmd)); | |
1da177e4 LT |
510 | |
511 | if (_IOC_TYPE(cmd) == 'P') /* new-style ioctl number */ | |
512 | ||
513 | switch (_IOC_NR(cmd)) { | |
514 | ||
916de027 NK |
515 | case IOCNR_GET_DEVICE_ID: /* get the DEVICE_ID string */ |
516 | if (_IOC_DIR(cmd) != _IOC_READ) { | |
517 | retval = -EINVAL; | |
518 | goto done; | |
519 | } | |
1da177e4 | 520 | |
916de027 NK |
521 | length = usblp_cache_device_id_string(usblp); |
522 | if (length < 0) { | |
523 | retval = length; | |
524 | goto done; | |
525 | } | |
526 | if (length > _IOC_SIZE(cmd)) | |
527 | length = _IOC_SIZE(cmd); /* truncate */ | |
528 | ||
529 | if (copy_to_user((void __user *) arg, | |
530 | usblp->device_id_string, | |
531 | (unsigned long) length)) { | |
532 | retval = -EFAULT; | |
533 | goto done; | |
534 | } | |
1da177e4 | 535 | |
916de027 | 536 | break; |
1da177e4 | 537 | |
916de027 NK |
538 | case IOCNR_GET_PROTOCOLS: |
539 | if (_IOC_DIR(cmd) != _IOC_READ || | |
540 | _IOC_SIZE(cmd) < sizeof(twoints)) { | |
541 | retval = -EINVAL; | |
542 | goto done; | |
543 | } | |
1da177e4 | 544 | |
916de027 NK |
545 | twoints[0] = usblp->current_protocol; |
546 | twoints[1] = 0; | |
547 | for (i = USBLP_FIRST_PROTOCOL; | |
548 | i <= USBLP_LAST_PROTOCOL; i++) { | |
549 | if (usblp->protocol[i].alt_setting >= 0) | |
550 | twoints[1] |= (1<<i); | |
551 | } | |
1da177e4 | 552 | |
916de027 NK |
553 | if (copy_to_user((void __user *)arg, |
554 | (unsigned char *)twoints, | |
555 | sizeof(twoints))) { | |
556 | retval = -EFAULT; | |
557 | goto done; | |
558 | } | |
1da177e4 | 559 | |
916de027 | 560 | break; |
1da177e4 | 561 | |
916de027 NK |
562 | case IOCNR_SET_PROTOCOL: |
563 | if (_IOC_DIR(cmd) != _IOC_WRITE) { | |
564 | retval = -EINVAL; | |
565 | goto done; | |
566 | } | |
1da177e4 LT |
567 | |
568 | #ifdef DEBUG | |
916de027 NK |
569 | if (arg == -10) { |
570 | usblp_dump(usblp); | |
571 | break; | |
572 | } | |
1da177e4 LT |
573 | #endif |
574 | ||
916de027 NK |
575 | usblp_unlink_urbs(usblp); |
576 | retval = usblp_set_protocol(usblp, arg); | |
577 | if (retval < 0) { | |
578 | usblp_set_protocol(usblp, | |
579 | usblp->current_protocol); | |
580 | } | |
581 | break; | |
1da177e4 | 582 | |
916de027 NK |
583 | case IOCNR_HP_SET_CHANNEL: |
584 | if (_IOC_DIR(cmd) != _IOC_WRITE || | |
585 | le16_to_cpu(usblp->dev->descriptor.idVendor) != 0x03F0 || | |
586 | usblp->quirks & USBLP_QUIRK_BIDIR) { | |
587 | retval = -EINVAL; | |
588 | goto done; | |
589 | } | |
1da177e4 | 590 | |
916de027 NK |
591 | err = usblp_hp_channel_change_request(usblp, |
592 | arg, &newChannel); | |
593 | if (err < 0) { | |
594 | dev_err(&usblp->dev->dev, | |
595 | "usblp%d: error = %d setting " | |
596 | "HP channel\n", | |
597 | usblp->minor, err); | |
598 | retval = -EIO; | |
599 | goto done; | |
600 | } | |
1da177e4 | 601 | |
4f306309 GKH |
602 | dev_dbg(&usblp->intf->dev, |
603 | "usblp%d requested/got HP channel %ld/%d\n", | |
916de027 NK |
604 | usblp->minor, arg, newChannel); |
605 | break; | |
1da177e4 | 606 | |
916de027 NK |
607 | case IOCNR_GET_BUS_ADDRESS: |
608 | if (_IOC_DIR(cmd) != _IOC_READ || | |
609 | _IOC_SIZE(cmd) < sizeof(twoints)) { | |
610 | retval = -EINVAL; | |
611 | goto done; | |
612 | } | |
1da177e4 | 613 | |
916de027 NK |
614 | twoints[0] = usblp->dev->bus->busnum; |
615 | twoints[1] = usblp->dev->devnum; | |
616 | if (copy_to_user((void __user *)arg, | |
617 | (unsigned char *)twoints, | |
618 | sizeof(twoints))) { | |
619 | retval = -EFAULT; | |
620 | goto done; | |
621 | } | |
1da177e4 | 622 | |
4f306309 GKH |
623 | dev_dbg(&usblp->intf->dev, |
624 | "usblp%d is bus=%d, device=%d\n", | |
916de027 NK |
625 | usblp->minor, twoints[0], twoints[1]); |
626 | break; | |
1da177e4 | 627 | |
916de027 NK |
628 | case IOCNR_GET_VID_PID: |
629 | if (_IOC_DIR(cmd) != _IOC_READ || | |
630 | _IOC_SIZE(cmd) < sizeof(twoints)) { | |
631 | retval = -EINVAL; | |
632 | goto done; | |
633 | } | |
1da177e4 | 634 | |
916de027 NK |
635 | twoints[0] = le16_to_cpu(usblp->dev->descriptor.idVendor); |
636 | twoints[1] = le16_to_cpu(usblp->dev->descriptor.idProduct); | |
637 | if (copy_to_user((void __user *)arg, | |
638 | (unsigned char *)twoints, | |
639 | sizeof(twoints))) { | |
640 | retval = -EFAULT; | |
641 | goto done; | |
642 | } | |
1da177e4 | 643 | |
4f306309 GKH |
644 | dev_dbg(&usblp->intf->dev, |
645 | "usblp%d is VID=0x%4.4X, PID=0x%4.4X\n", | |
916de027 NK |
646 | usblp->minor, twoints[0], twoints[1]); |
647 | break; | |
1da177e4 | 648 | |
916de027 NK |
649 | case IOCNR_SOFT_RESET: |
650 | if (_IOC_DIR(cmd) != _IOC_NONE) { | |
651 | retval = -EINVAL; | |
652 | goto done; | |
653 | } | |
654 | retval = usblp_reset(usblp); | |
655 | break; | |
656 | default: | |
657 | retval = -ENOTTY; | |
1da177e4 LT |
658 | } |
659 | else /* old-style ioctl value */ | |
660 | switch (cmd) { | |
661 | ||
916de027 | 662 | case LPGETSTATUS: |
2fcdbdfd GKH |
663 | retval = usblp_read_status(usblp, usblp->statusbuf); |
664 | if (retval) { | |
305e7be5 | 665 | printk_ratelimited(KERN_ERR "usblp%d:" |
916de027 NK |
666 | "failed reading printer status (%d)\n", |
667 | usblp->minor, retval); | |
668 | retval = -EIO; | |
669 | goto done; | |
670 | } | |
671 | status = *usblp->statusbuf; | |
672 | if (copy_to_user((void __user *)arg, &status, sizeof(int))) | |
673 | retval = -EFAULT; | |
674 | break; | |
1da177e4 | 675 | |
916de027 NK |
676 | case LPABORT: |
677 | if (arg) | |
678 | usblp->flags |= LP_ABORT; | |
679 | else | |
680 | usblp->flags &= ~LP_ABORT; | |
681 | break; | |
7f477358 | 682 | |
916de027 NK |
683 | default: |
684 | retval = -ENOTTY; | |
1da177e4 LT |
685 | } |
686 | ||
687 | done: | |
916de027 | 688 | mutex_unlock(&usblp->mut); |
1da177e4 LT |
689 | return retval; |
690 | } | |
691 | ||
42cb967f PZ |
692 | static struct urb *usblp_new_writeurb(struct usblp *usblp, int transfer_length) |
693 | { | |
694 | struct urb *urb; | |
695 | char *writebuf; | |
696 | ||
2fcdbdfd GKH |
697 | writebuf = kmalloc(transfer_length, GFP_KERNEL); |
698 | if (writebuf == NULL) | |
42cb967f | 699 | return NULL; |
2fcdbdfd GKH |
700 | urb = usb_alloc_urb(0, GFP_KERNEL); |
701 | if (urb == NULL) { | |
42cb967f PZ |
702 | kfree(writebuf); |
703 | return NULL; | |
704 | } | |
705 | ||
706 | usb_fill_bulk_urb(urb, usblp->dev, | |
707 | usb_sndbulkpipe(usblp->dev, | |
708 | usblp->protocol[usblp->current_protocol].epwrite->bEndpointAddress), | |
709 | writebuf, transfer_length, usblp_bulk_write, usblp); | |
710 | urb->transfer_flags |= URB_FREE_BUFFER; | |
711 | ||
712 | return urb; | |
713 | } | |
714 | ||
1da177e4 LT |
715 | static ssize_t usblp_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos) |
716 | { | |
1da177e4 | 717 | struct usblp *usblp = file->private_data; |
317c67b8 PZ |
718 | struct urb *writeurb; |
719 | int rv; | |
720 | int transfer_length; | |
721 | ssize_t writecount = 0; | |
722 | ||
723 | if (mutex_lock_interruptible(&usblp->wmut)) { | |
724 | rv = -EINTR; | |
725 | goto raise_biglock; | |
726 | } | |
727 | if ((rv = usblp_wwait(usblp, !!(file->f_flags & O_NONBLOCK))) < 0) | |
728 | goto raise_wait; | |
1da177e4 LT |
729 | |
730 | while (writecount < count) { | |
317c67b8 PZ |
731 | /* |
732 | * Step 1: Submit next block. | |
1da177e4 | 733 | */ |
317c67b8 | 734 | if ((transfer_length = count - writecount) > USBLP_BUF_SIZE) |
1da177e4 LT |
735 | transfer_length = USBLP_BUF_SIZE; |
736 | ||
317c67b8 | 737 | rv = -ENOMEM; |
2fcdbdfd GKH |
738 | writeurb = usblp_new_writeurb(usblp, transfer_length); |
739 | if (writeurb == NULL) | |
317c67b8 | 740 | goto raise_urb; |
317c67b8 PZ |
741 | usb_anchor_urb(writeurb, &usblp->urbs); |
742 | ||
42cb967f | 743 | if (copy_from_user(writeurb->transfer_buffer, |
1da177e4 | 744 | buffer + writecount, transfer_length)) { |
317c67b8 PZ |
745 | rv = -EFAULT; |
746 | goto raise_badaddr; | |
1da177e4 LT |
747 | } |
748 | ||
317c67b8 | 749 | spin_lock_irq(&usblp->lock); |
1da177e4 | 750 | usblp->wcomplete = 0; |
317c67b8 PZ |
751 | spin_unlock_irq(&usblp->lock); |
752 | if ((rv = usb_submit_urb(writeurb, GFP_KERNEL)) < 0) { | |
753 | usblp->wstatus = 0; | |
754 | spin_lock_irq(&usblp->lock); | |
7f477358 | 755 | usblp->no_paper = 0; |
6c8df79f | 756 | usblp->wcomplete = 1; |
317c67b8 PZ |
757 | wake_up(&usblp->wwait); |
758 | spin_unlock_irq(&usblp->lock); | |
759 | if (rv != -ENOMEM) | |
760 | rv = -EIO; | |
761 | goto raise_submit; | |
762 | } | |
763 | ||
764 | /* | |
765 | * Step 2: Wait for transfer to end, collect results. | |
766 | */ | |
767 | rv = usblp_wwait(usblp, !!(file->f_flags&O_NONBLOCK)); | |
768 | if (rv < 0) { | |
10e48522 PZ |
769 | if (rv == -EAGAIN) { |
770 | /* Presume that it's going to complete well. */ | |
771 | writecount += transfer_length; | |
772 | } | |
7f477358 PZ |
773 | if (rv == -ENOSPC) { |
774 | spin_lock_irq(&usblp->lock); | |
775 | usblp->no_paper = 1; /* Mark for poll(2) */ | |
776 | spin_unlock_irq(&usblp->lock); | |
777 | writecount += transfer_length; | |
778 | } | |
10e48522 | 779 | /* Leave URB dangling, to be cleaned on close. */ |
317c67b8 | 780 | goto collect_error; |
1da177e4 | 781 | } |
317c67b8 PZ |
782 | |
783 | if (usblp->wstatus < 0) { | |
317c67b8 PZ |
784 | rv = -EIO; |
785 | goto collect_error; | |
786 | } | |
787 | /* | |
788 | * This is critical: it must be our URB, not other writer's. | |
789 | * The wmut exists mainly to cover us here. | |
790 | */ | |
791 | writecount += usblp->wstatus; | |
1da177e4 LT |
792 | } |
793 | ||
317c67b8 PZ |
794 | mutex_unlock(&usblp->wmut); |
795 | return writecount; | |
796 | ||
797 | raise_submit: | |
798 | raise_badaddr: | |
799 | usb_unanchor_urb(writeurb); | |
800 | usb_free_urb(writeurb); | |
801 | raise_urb: | |
317c67b8 PZ |
802 | raise_wait: |
803 | collect_error: /* Out of raise sequence */ | |
804 | mutex_unlock(&usblp->wmut); | |
805 | raise_biglock: | |
806 | return writecount ? writecount : rv; | |
1da177e4 LT |
807 | } |
808 | ||
317c67b8 PZ |
809 | /* |
810 | * Notice that we fail to restart in a few cases: on EFAULT, on restart | |
811 | * error, etc. This is the historical behaviour. In all such cases we return | |
812 | * EIO, and applications loop in order to get the new read going. | |
813 | */ | |
814 | static ssize_t usblp_read(struct file *file, char __user *buffer, size_t len, loff_t *ppos) | |
1da177e4 LT |
815 | { |
816 | struct usblp *usblp = file->private_data; | |
317c67b8 PZ |
817 | ssize_t count; |
818 | ssize_t avail; | |
819 | int rv; | |
1da177e4 LT |
820 | |
821 | if (!usblp->bidir) | |
822 | return -EINVAL; | |
823 | ||
317c67b8 PZ |
824 | rv = usblp_rwait_and_lock(usblp, !!(file->f_flags & O_NONBLOCK)); |
825 | if (rv < 0) | |
826 | return rv; | |
827 | ||
828 | if ((avail = usblp->rstatus) < 0) { | |
829 | printk(KERN_ERR "usblp%d: error %d reading from printer\n", | |
830 | usblp->minor, (int)avail); | |
831 | usblp_submit_read(usblp); | |
832 | count = -EIO; | |
1da177e4 LT |
833 | goto done; |
834 | } | |
835 | ||
317c67b8 PZ |
836 | count = len < avail - usblp->readcount ? len : avail - usblp->readcount; |
837 | if (count != 0 && | |
838 | copy_to_user(buffer, usblp->readbuf + usblp->readcount, count)) { | |
839 | count = -EFAULT; | |
840 | goto done; | |
841 | } | |
1da177e4 | 842 | |
317c67b8 PZ |
843 | if ((usblp->readcount += count) == avail) { |
844 | if (usblp_submit_read(usblp) < 0) { | |
845 | /* We don't want to leak USB return codes into errno. */ | |
846 | if (count == 0) | |
847 | count = -EIO; | |
8e695cdb | 848 | goto done; |
1da177e4 | 849 | } |
1da177e4 LT |
850 | } |
851 | ||
317c67b8 | 852 | done: |
916de027 | 853 | mutex_unlock(&usblp->mut); |
317c67b8 PZ |
854 | return count; |
855 | } | |
856 | ||
857 | /* | |
858 | * Wait for the write path to come idle. | |
859 | * This is called under the ->wmut, so the idle path stays idle. | |
860 | * | |
861 | * Our write path has a peculiar property: it does not buffer like a tty, | |
862 | * but waits for the write to succeed. This allows our ->release to bug out | |
863 | * without waiting for writes to drain. But it obviously does not work | |
864 | * when O_NONBLOCK is set. So, applications setting O_NONBLOCK must use | |
865 | * select(2) or poll(2) to wait for the buffer to drain before closing. | |
866 | * Alternatively, set blocking mode with fcntl and issue a zero-size write. | |
317c67b8 PZ |
867 | */ |
868 | static int usblp_wwait(struct usblp *usblp, int nonblock) | |
869 | { | |
870 | DECLARE_WAITQUEUE(waita, current); | |
871 | int rc; | |
7f477358 | 872 | int err = 0; |
317c67b8 PZ |
873 | |
874 | add_wait_queue(&usblp->wwait, &waita); | |
875 | for (;;) { | |
7f477358 | 876 | set_current_state(TASK_INTERRUPTIBLE); |
317c67b8 PZ |
877 | if (mutex_lock_interruptible(&usblp->mut)) { |
878 | rc = -EINTR; | |
879 | break; | |
880 | } | |
7f477358 | 881 | rc = usblp_wtest(usblp, nonblock); |
317c67b8 | 882 | mutex_unlock(&usblp->mut); |
7f477358 | 883 | if (rc <= 0) |
317c67b8 | 884 | break; |
7f477358 | 885 | |
dd44be6b PZ |
886 | if (schedule_timeout(msecs_to_jiffies(1500)) == 0) { |
887 | if (usblp->flags & LP_ABORT) { | |
7f477358 PZ |
888 | err = usblp_check_status(usblp, err); |
889 | if (err == 1) { /* Paper out */ | |
890 | rc = -ENOSPC; | |
891 | break; | |
892 | } | |
dd44be6b PZ |
893 | } else { |
894 | /* Prod the printer, Gentoo#251237. */ | |
895 | mutex_lock(&usblp->mut); | |
896 | usblp_read_status(usblp, usblp->statusbuf); | |
897 | mutex_unlock(&usblp->mut); | |
7f477358 | 898 | } |
7f477358 | 899 | } |
1da177e4 | 900 | } |
317c67b8 PZ |
901 | set_current_state(TASK_RUNNING); |
902 | remove_wait_queue(&usblp->wwait, &waita); | |
903 | return rc; | |
904 | } | |
1da177e4 | 905 | |
317c67b8 PZ |
906 | static int usblp_wtest(struct usblp *usblp, int nonblock) |
907 | { | |
908 | unsigned long flags; | |
909 | ||
910 | if (!usblp->present) | |
911 | return -ENODEV; | |
912 | if (signal_pending(current)) | |
913 | return -EINTR; | |
914 | spin_lock_irqsave(&usblp->lock, flags); | |
915 | if (usblp->wcomplete) { | |
916 | spin_unlock_irqrestore(&usblp->lock, flags); | |
917 | return 0; | |
516077c1 | 918 | } |
317c67b8 | 919 | spin_unlock_irqrestore(&usblp->lock, flags); |
317c67b8 PZ |
920 | if (nonblock) |
921 | return -EAGAIN; | |
922 | return 1; | |
923 | } | |
516077c1 | 924 | |
317c67b8 PZ |
925 | /* |
926 | * Wait for read bytes to become available. This probably should have been | |
927 | * called usblp_r_lock_and_wait(), because we lock first. But it's a traditional | |
928 | * name for functions which lock and return. | |
929 | * | |
930 | * We do not use wait_event_interruptible because it makes locking iffy. | |
931 | */ | |
932 | static int usblp_rwait_and_lock(struct usblp *usblp, int nonblock) | |
933 | { | |
934 | DECLARE_WAITQUEUE(waita, current); | |
935 | int rc; | |
936 | ||
937 | add_wait_queue(&usblp->rwait, &waita); | |
938 | for (;;) { | |
939 | if (mutex_lock_interruptible(&usblp->mut)) { | |
940 | rc = -EINTR; | |
941 | break; | |
942 | } | |
943 | set_current_state(TASK_INTERRUPTIBLE); | |
944 | if ((rc = usblp_rtest(usblp, nonblock)) < 0) { | |
945 | mutex_unlock(&usblp->mut); | |
946 | break; | |
947 | } | |
948 | if (rc == 0) /* Keep it locked */ | |
949 | break; | |
950 | mutex_unlock(&usblp->mut); | |
951 | schedule(); | |
1da177e4 | 952 | } |
317c67b8 PZ |
953 | set_current_state(TASK_RUNNING); |
954 | remove_wait_queue(&usblp->rwait, &waita); | |
955 | return rc; | |
956 | } | |
1da177e4 | 957 | |
317c67b8 PZ |
958 | static int usblp_rtest(struct usblp *usblp, int nonblock) |
959 | { | |
960 | unsigned long flags; | |
1da177e4 | 961 | |
317c67b8 PZ |
962 | if (!usblp->present) |
963 | return -ENODEV; | |
964 | if (signal_pending(current)) | |
965 | return -EINTR; | |
966 | spin_lock_irqsave(&usblp->lock, flags); | |
967 | if (usblp->rcomplete) { | |
968 | spin_unlock_irqrestore(&usblp->lock, flags); | |
969 | return 0; | |
1da177e4 | 970 | } |
317c67b8 | 971 | spin_unlock_irqrestore(&usblp->lock, flags); |
317c67b8 PZ |
972 | if (nonblock) |
973 | return -EAGAIN; | |
974 | return 1; | |
975 | } | |
1da177e4 | 976 | |
317c67b8 PZ |
977 | /* |
978 | * Please check ->bidir and other such things outside for now. | |
979 | */ | |
980 | static int usblp_submit_read(struct usblp *usblp) | |
981 | { | |
982 | struct urb *urb; | |
983 | unsigned long flags; | |
984 | int rc; | |
985 | ||
986 | rc = -ENOMEM; | |
2fcdbdfd GKH |
987 | urb = usb_alloc_urb(0, GFP_KERNEL); |
988 | if (urb == NULL) | |
317c67b8 PZ |
989 | goto raise_urb; |
990 | ||
991 | usb_fill_bulk_urb(urb, usblp->dev, | |
992 | usb_rcvbulkpipe(usblp->dev, | |
993 | usblp->protocol[usblp->current_protocol].epread->bEndpointAddress), | |
994 | usblp->readbuf, USBLP_BUF_SIZE_IN, | |
995 | usblp_bulk_read, usblp); | |
996 | usb_anchor_urb(urb, &usblp->urbs); | |
997 | ||
998 | spin_lock_irqsave(&usblp->lock, flags); | |
999 | usblp->readcount = 0; /* XXX Why here? */ | |
1000 | usblp->rcomplete = 0; | |
1001 | spin_unlock_irqrestore(&usblp->lock, flags); | |
1002 | if ((rc = usb_submit_urb(urb, GFP_KERNEL)) < 0) { | |
4f306309 | 1003 | dev_dbg(&usblp->intf->dev, "error submitting urb (%d)\n", rc); |
317c67b8 PZ |
1004 | spin_lock_irqsave(&usblp->lock, flags); |
1005 | usblp->rstatus = rc; | |
1006 | usblp->rcomplete = 1; | |
1007 | spin_unlock_irqrestore(&usblp->lock, flags); | |
1008 | goto raise_submit; | |
1da177e4 LT |
1009 | } |
1010 | ||
317c67b8 PZ |
1011 | return 0; |
1012 | ||
1013 | raise_submit: | |
1014 | usb_unanchor_urb(urb); | |
1015 | usb_free_urb(urb); | |
1016 | raise_urb: | |
1017 | return rc; | |
1da177e4 LT |
1018 | } |
1019 | ||
1020 | /* | |
1021 | * Checks for printers that have quirks, such as requiring unidirectional | |
1022 | * communication but reporting bidirectional; currently some HP printers | |
1023 | * have this flaw (HP 810, 880, 895, etc.), or needing an init string | |
1024 | * sent at each open (like some Epsons). | |
1025 | * Returns 1 if found, 0 if not found. | |
1026 | * | |
1027 | * HP recommended that we use the bidirectional interface but | |
1028 | * don't attempt any bulk IN transfers from the IN endpoint. | |
1029 | * Here's some more detail on the problem: | |
1030 | * The problem is not that it isn't bidirectional though. The problem | |
1031 | * is that if you request a device ID, or status information, while | |
1032 | * the buffers are full, the return data will end up in the print data | |
1033 | * buffer. For example if you make sure you never request the device ID | |
1034 | * while you are sending print data, and you don't try to query the | |
1035 | * printer status every couple of milliseconds, you will probably be OK. | |
1036 | */ | |
916de027 | 1037 | static unsigned int usblp_quirks(__u16 vendor, __u16 product) |
1da177e4 LT |
1038 | { |
1039 | int i; | |
1040 | ||
1041 | for (i = 0; quirk_printers[i].vendorId; i++) { | |
1042 | if (vendor == quirk_printers[i].vendorId && | |
1043 | product == quirk_printers[i].productId) | |
1044 | return quirk_printers[i].quirks; | |
916de027 | 1045 | } |
1da177e4 LT |
1046 | return 0; |
1047 | } | |
1048 | ||
066202dd | 1049 | static const struct file_operations usblp_fops = { |
1da177e4 LT |
1050 | .owner = THIS_MODULE, |
1051 | .read = usblp_read, | |
1052 | .write = usblp_write, | |
1053 | .poll = usblp_poll, | |
318e479e PZ |
1054 | .unlocked_ioctl = usblp_ioctl, |
1055 | .compat_ioctl = usblp_ioctl, | |
1da177e4 LT |
1056 | .open = usblp_open, |
1057 | .release = usblp_release, | |
6038f373 | 1058 | .llseek = noop_llseek, |
1da177e4 LT |
1059 | }; |
1060 | ||
2c9ede55 | 1061 | static char *usblp_devnode(struct device *dev, umode_t *mode) |
f7a386c5 KS |
1062 | { |
1063 | return kasprintf(GFP_KERNEL, "usb/%s", dev_name(dev)); | |
1064 | } | |
1065 | ||
1da177e4 | 1066 | static struct usb_class_driver usblp_class = { |
d6e5bcf4 | 1067 | .name = "lp%d", |
e454cea2 | 1068 | .devnode = usblp_devnode, |
1da177e4 | 1069 | .fops = &usblp_fops, |
1da177e4 LT |
1070 | .minor_base = USBLP_MINOR_BASE, |
1071 | }; | |
1072 | ||
a9714c84 DW |
1073 | static ssize_t usblp_show_ieee1284_id(struct device *dev, struct device_attribute *attr, char *buf) |
1074 | { | |
1075 | struct usb_interface *intf = to_usb_interface(dev); | |
916de027 | 1076 | struct usblp *usblp = usb_get_intfdata(intf); |
a9714c84 DW |
1077 | |
1078 | if (usblp->device_id_string[0] == 0 && | |
1079 | usblp->device_id_string[1] == 0) | |
1080 | return 0; | |
1081 | ||
1082 | return sprintf(buf, "%s", usblp->device_id_string+2); | |
1083 | } | |
1084 | ||
1085 | static DEVICE_ATTR(ieee1284_id, S_IRUGO, usblp_show_ieee1284_id, NULL); | |
1086 | ||
1da177e4 LT |
1087 | static int usblp_probe(struct usb_interface *intf, |
1088 | const struct usb_device_id *id) | |
1089 | { | |
916de027 | 1090 | struct usb_device *dev = interface_to_usbdev(intf); |
49b707b9 | 1091 | struct usblp *usblp; |
1da177e4 LT |
1092 | int protocol; |
1093 | int retval; | |
1094 | ||
1095 | /* Malloc and start initializing usblp structure so we can use it | |
1096 | * directly. */ | |
49b707b9 JL |
1097 | usblp = kzalloc(sizeof(struct usblp), GFP_KERNEL); |
1098 | if (!usblp) { | |
317c67b8 | 1099 | retval = -ENOMEM; |
49b707b9 | 1100 | goto abort_ret; |
1da177e4 | 1101 | } |
1da177e4 | 1102 | usblp->dev = dev; |
317c67b8 | 1103 | mutex_init(&usblp->wmut); |
916de027 | 1104 | mutex_init(&usblp->mut); |
317c67b8 PZ |
1105 | spin_lock_init(&usblp->lock); |
1106 | init_waitqueue_head(&usblp->rwait); | |
1107 | init_waitqueue_head(&usblp->wwait); | |
1108 | init_usb_anchor(&usblp->urbs); | |
1da177e4 LT |
1109 | usblp->ifnum = intf->cur_altsetting->desc.bInterfaceNumber; |
1110 | usblp->intf = intf; | |
1111 | ||
1da177e4 LT |
1112 | /* Malloc device ID string buffer to the largest expected length, |
1113 | * since we can re-query it on an ioctl and a dynamic string | |
1114 | * could change in length. */ | |
1115 | if (!(usblp->device_id_string = kmalloc(USBLP_DEVICE_ID_SIZE, GFP_KERNEL))) { | |
317c67b8 | 1116 | retval = -ENOMEM; |
1da177e4 LT |
1117 | goto abort; |
1118 | } | |
1119 | ||
317c67b8 PZ |
1120 | /* |
1121 | * Allocate read buffer. We somewhat wastefully | |
1da177e4 | 1122 | * malloc both regardless of bidirectionality, because the |
317c67b8 PZ |
1123 | * alternate setting can be changed later via an ioctl. |
1124 | */ | |
1125 | if (!(usblp->readbuf = kmalloc(USBLP_BUF_SIZE_IN, GFP_KERNEL))) { | |
1126 | retval = -ENOMEM; | |
1da177e4 LT |
1127 | goto abort; |
1128 | } | |
1129 | ||
1130 | /* Allocate buffer for printer status */ | |
1131 | usblp->statusbuf = kmalloc(STATUS_BUF_SIZE, GFP_KERNEL); | |
1132 | if (!usblp->statusbuf) { | |
317c67b8 | 1133 | retval = -ENOMEM; |
1da177e4 LT |
1134 | goto abort; |
1135 | } | |
1136 | ||
1137 | /* Lookup quirks for this printer. */ | |
1138 | usblp->quirks = usblp_quirks( | |
1139 | le16_to_cpu(dev->descriptor.idVendor), | |
1140 | le16_to_cpu(dev->descriptor.idProduct)); | |
1141 | ||
1142 | /* Analyze and pick initial alternate settings and endpoints. */ | |
1143 | protocol = usblp_select_alts(usblp); | |
1144 | if (protocol < 0) { | |
4f306309 GKH |
1145 | dev_dbg(&intf->dev, |
1146 | "incompatible printer-class device 0x%4.4X/0x%4.4X\n", | |
1da177e4 LT |
1147 | le16_to_cpu(dev->descriptor.idVendor), |
1148 | le16_to_cpu(dev->descriptor.idProduct)); | |
317c67b8 | 1149 | retval = -ENODEV; |
1da177e4 LT |
1150 | goto abort; |
1151 | } | |
1152 | ||
1153 | /* Setup the selected alternate setting and endpoints. */ | |
317c67b8 PZ |
1154 | if (usblp_set_protocol(usblp, protocol) < 0) { |
1155 | retval = -ENODEV; /* ->probe isn't ->ioctl */ | |
1da177e4 | 1156 | goto abort; |
317c67b8 | 1157 | } |
1da177e4 LT |
1158 | |
1159 | /* Retrieve and store the device ID string. */ | |
1160 | usblp_cache_device_id_string(usblp); | |
96cede53 GKH |
1161 | retval = device_create_file(&intf->dev, &dev_attr_ieee1284_id); |
1162 | if (retval) | |
1163 | goto abort_intfdata; | |
1da177e4 LT |
1164 | |
1165 | #ifdef DEBUG | |
1166 | usblp_check_status(usblp, 0); | |
1167 | #endif | |
1168 | ||
916de027 | 1169 | usb_set_intfdata(intf, usblp); |
1da177e4 LT |
1170 | |
1171 | usblp->present = 1; | |
1172 | ||
1173 | retval = usb_register_dev(intf, &usblp_class); | |
1174 | if (retval) { | |
4f306309 GKH |
1175 | dev_err(&intf->dev, |
1176 | "usblp: Not able to get a minor (base %u, slice default): %d\n", | |
1177 | USBLP_MINOR_BASE, retval); | |
1da177e4 LT |
1178 | goto abort_intfdata; |
1179 | } | |
1180 | usblp->minor = intf->minor; | |
4f306309 GKH |
1181 | dev_info(&intf->dev, |
1182 | "usblp%d: USB %sdirectional printer dev %d if %d alt %d proto %d vid 0x%4.4X pid 0x%4.4X\n", | |
a9714c84 DW |
1183 | usblp->minor, usblp->bidir ? "Bi" : "Uni", dev->devnum, |
1184 | usblp->ifnum, | |
1185 | usblp->protocol[usblp->current_protocol].alt_setting, | |
1186 | usblp->current_protocol, | |
1187 | le16_to_cpu(usblp->dev->descriptor.idVendor), | |
1188 | le16_to_cpu(usblp->dev->descriptor.idProduct)); | |
1da177e4 LT |
1189 | |
1190 | return 0; | |
1191 | ||
1192 | abort_intfdata: | |
916de027 | 1193 | usb_set_intfdata(intf, NULL); |
a9714c84 | 1194 | device_remove_file(&intf->dev, &dev_attr_ieee1284_id); |
1da177e4 | 1195 | abort: |
49b707b9 JL |
1196 | kfree(usblp->readbuf); |
1197 | kfree(usblp->statusbuf); | |
1198 | kfree(usblp->device_id_string); | |
1199 | kfree(usblp); | |
1200 | abort_ret: | |
317c67b8 | 1201 | return retval; |
1da177e4 LT |
1202 | } |
1203 | ||
1204 | /* | |
1205 | * We are a "new" style driver with usb_device_id table, | |
1206 | * but our requirements are too intricate for simple match to handle. | |
1207 | * | |
1208 | * The "proto_bias" option may be used to specify the preferred protocol | |
1209 | * for all USB printers (1=7/1/1, 2=7/1/2, 3=7/1/3). If the device | |
1210 | * supports the preferred protocol, then we bind to it. | |
1211 | * | |
1212 | * The best interface for us is 7/1/2, because it is compatible | |
1213 | * with a stream of characters. If we find it, we bind to it. | |
1214 | * | |
1215 | * Note that the people from hpoj.sourceforge.net need to be able to | |
1216 | * bind to 7/1/3 (MLC/1284.4), so we provide them ioctls for this purpose. | |
1217 | * | |
1218 | * Failing 7/1/2, we look for 7/1/3, even though it's probably not | |
1219 | * stream-compatible, because this matches the behaviour of the old code. | |
1220 | * | |
1221 | * If nothing else, we bind to 7/1/1 - the unidirectional interface. | |
1222 | */ | |
1223 | static int usblp_select_alts(struct usblp *usblp) | |
1224 | { | |
1225 | struct usb_interface *if_alt; | |
1226 | struct usb_host_interface *ifd; | |
1227 | struct usb_endpoint_descriptor *epd, *epwrite, *epread; | |
1228 | int p, i, e; | |
1229 | ||
1230 | if_alt = usblp->intf; | |
1231 | ||
1232 | for (p = 0; p < USBLP_MAX_PROTOCOLS; p++) | |
1233 | usblp->protocol[p].alt_setting = -1; | |
1234 | ||
1235 | /* Find out what we have. */ | |
1236 | for (i = 0; i < if_alt->num_altsetting; i++) { | |
1237 | ifd = &if_alt->altsetting[i]; | |
1238 | ||
1239 | if (ifd->desc.bInterfaceClass != 7 || ifd->desc.bInterfaceSubClass != 1) | |
5ec71db5 AS |
1240 | if (!(usblp->quirks & USBLP_QUIRK_BAD_CLASS)) |
1241 | continue; | |
1da177e4 LT |
1242 | |
1243 | if (ifd->desc.bInterfaceProtocol < USBLP_FIRST_PROTOCOL || | |
1244 | ifd->desc.bInterfaceProtocol > USBLP_LAST_PROTOCOL) | |
1245 | continue; | |
1246 | ||
1247 | /* Look for bulk OUT and IN endpoints. */ | |
1248 | epwrite = epread = NULL; | |
1249 | for (e = 0; e < ifd->desc.bNumEndpoints; e++) { | |
1250 | epd = &ifd->endpoint[e].desc; | |
1251 | ||
5bc66d53 | 1252 | if (usb_endpoint_is_bulk_out(epd)) |
1da177e4 LT |
1253 | if (!epwrite) |
1254 | epwrite = epd; | |
1255 | ||
5bc66d53 | 1256 | if (usb_endpoint_is_bulk_in(epd)) |
1da177e4 LT |
1257 | if (!epread) |
1258 | epread = epd; | |
1da177e4 LT |
1259 | } |
1260 | ||
1261 | /* Ignore buggy hardware without the right endpoints. */ | |
1262 | if (!epwrite || (ifd->desc.bInterfaceProtocol > 1 && !epread)) | |
1263 | continue; | |
1264 | ||
1265 | /* Turn off reads for 7/1/1 (unidirectional) interfaces | |
1266 | * and buggy bidirectional printers. */ | |
1267 | if (ifd->desc.bInterfaceProtocol == 1) { | |
1268 | epread = NULL; | |
1269 | } else if (usblp->quirks & USBLP_QUIRK_BIDIR) { | |
317c67b8 PZ |
1270 | printk(KERN_INFO "usblp%d: Disabling reads from " |
1271 | "problematic bidirectional printer\n", | |
1272 | usblp->minor); | |
1da177e4 LT |
1273 | epread = NULL; |
1274 | } | |
1275 | ||
1276 | usblp->protocol[ifd->desc.bInterfaceProtocol].alt_setting = | |
1277 | ifd->desc.bAlternateSetting; | |
1278 | usblp->protocol[ifd->desc.bInterfaceProtocol].epwrite = epwrite; | |
1279 | usblp->protocol[ifd->desc.bInterfaceProtocol].epread = epread; | |
1280 | } | |
1281 | ||
1282 | /* If our requested protocol is supported, then use it. */ | |
1283 | if (proto_bias >= USBLP_FIRST_PROTOCOL && | |
1284 | proto_bias <= USBLP_LAST_PROTOCOL && | |
1285 | usblp->protocol[proto_bias].alt_setting != -1) | |
1286 | return proto_bias; | |
1287 | ||
1288 | /* Ordering is important here. */ | |
1289 | if (usblp->protocol[2].alt_setting != -1) | |
1290 | return 2; | |
1291 | if (usblp->protocol[1].alt_setting != -1) | |
1292 | return 1; | |
1293 | if (usblp->protocol[3].alt_setting != -1) | |
1294 | return 3; | |
1295 | ||
1296 | /* If nothing is available, then don't bind to this device. */ | |
1297 | return -1; | |
1298 | } | |
1299 | ||
1300 | static int usblp_set_protocol(struct usblp *usblp, int protocol) | |
1301 | { | |
1302 | int r, alts; | |
1303 | ||
1304 | if (protocol < USBLP_FIRST_PROTOCOL || protocol > USBLP_LAST_PROTOCOL) | |
1305 | return -EINVAL; | |
1306 | ||
1307 | alts = usblp->protocol[protocol].alt_setting; | |
1308 | if (alts < 0) | |
1309 | return -EINVAL; | |
1310 | r = usb_set_interface(usblp->dev, usblp->ifnum, alts); | |
1311 | if (r < 0) { | |
317c67b8 | 1312 | printk(KERN_ERR "usblp: can't set desired altsetting %d on interface %d\n", |
1da177e4 LT |
1313 | alts, usblp->ifnum); |
1314 | return r; | |
1315 | } | |
1316 | ||
1da177e4 | 1317 | usblp->bidir = (usblp->protocol[protocol].epread != NULL); |
1da177e4 | 1318 | usblp->current_protocol = protocol; |
4f306309 GKH |
1319 | dev_dbg(&usblp->intf->dev, "usblp%d set protocol %d\n", |
1320 | usblp->minor, protocol); | |
1da177e4 LT |
1321 | return 0; |
1322 | } | |
1323 | ||
1324 | /* Retrieves and caches device ID string. | |
1325 | * Returns length, including length bytes but not null terminator. | |
1326 | * On error, returns a negative errno value. */ | |
1327 | static int usblp_cache_device_id_string(struct usblp *usblp) | |
1328 | { | |
1329 | int err, length; | |
1330 | ||
1331 | err = usblp_get_id(usblp, 0, usblp->device_id_string, USBLP_DEVICE_ID_SIZE - 1); | |
1332 | if (err < 0) { | |
4f306309 GKH |
1333 | dev_dbg(&usblp->intf->dev, |
1334 | "usblp%d: error = %d reading IEEE-1284 Device ID string\n", | |
1da177e4 LT |
1335 | usblp->minor, err); |
1336 | usblp->device_id_string[0] = usblp->device_id_string[1] = '\0'; | |
1337 | return -EIO; | |
1338 | } | |
1339 | ||
1340 | /* First two bytes are length in big-endian. | |
1341 | * They count themselves, and we copy them into | |
1342 | * the user's buffer. */ | |
1343 | length = be16_to_cpu(*((__be16 *)usblp->device_id_string)); | |
1344 | if (length < 2) | |
1345 | length = 2; | |
1346 | else if (length >= USBLP_DEVICE_ID_SIZE) | |
1347 | length = USBLP_DEVICE_ID_SIZE - 1; | |
1348 | usblp->device_id_string[length] = '\0'; | |
1349 | ||
4f306309 | 1350 | dev_dbg(&usblp->intf->dev, "usblp%d Device ID string [len=%d]=\"%s\"\n", |
1da177e4 LT |
1351 | usblp->minor, length, &usblp->device_id_string[2]); |
1352 | ||
1353 | return length; | |
1354 | } | |
1355 | ||
1356 | static void usblp_disconnect(struct usb_interface *intf) | |
1357 | { | |
916de027 | 1358 | struct usblp *usblp = usb_get_intfdata(intf); |
1da177e4 LT |
1359 | |
1360 | usb_deregister_dev(intf, &usblp_class); | |
1361 | ||
1362 | if (!usblp || !usblp->dev) { | |
9908a32e | 1363 | dev_err(&intf->dev, "bogus disconnect\n"); |
916de027 | 1364 | BUG(); |
1da177e4 LT |
1365 | } |
1366 | ||
a9714c84 DW |
1367 | device_remove_file(&intf->dev, &dev_attr_ieee1284_id); |
1368 | ||
916de027 NK |
1369 | mutex_lock(&usblp_mutex); |
1370 | mutex_lock(&usblp->mut); | |
1da177e4 | 1371 | usblp->present = 0; |
317c67b8 PZ |
1372 | wake_up(&usblp->wwait); |
1373 | wake_up(&usblp->rwait); | |
916de027 | 1374 | usb_set_intfdata(intf, NULL); |
1da177e4 LT |
1375 | |
1376 | usblp_unlink_urbs(usblp); | |
916de027 | 1377 | mutex_unlock(&usblp->mut); |
1da177e4 LT |
1378 | |
1379 | if (!usblp->used) | |
916de027 NK |
1380 | usblp_cleanup(usblp); |
1381 | mutex_unlock(&usblp_mutex); | |
1da177e4 LT |
1382 | } |
1383 | ||
3a90f818 | 1384 | static int usblp_suspend(struct usb_interface *intf, pm_message_t message) |
516077c1 | 1385 | { |
916de027 | 1386 | struct usblp *usblp = usb_get_intfdata(intf); |
516077c1 | 1387 | |
516077c1 | 1388 | usblp_unlink_urbs(usblp); |
317c67b8 PZ |
1389 | #if 0 /* XXX Do we want this? What if someone is reading, should we fail? */ |
1390 | /* not strictly necessary, but just in case */ | |
1391 | wake_up(&usblp->wwait); | |
1392 | wake_up(&usblp->rwait); | |
1393 | #endif | |
516077c1 ON |
1394 | |
1395 | return 0; | |
1396 | } | |
1397 | ||
3a90f818 | 1398 | static int usblp_resume(struct usb_interface *intf) |
516077c1 | 1399 | { |
916de027 | 1400 | struct usblp *usblp = usb_get_intfdata(intf); |
516077c1 ON |
1401 | int r; |
1402 | ||
916de027 | 1403 | r = handle_bidir(usblp); |
516077c1 | 1404 | |
516077c1 ON |
1405 | return r; |
1406 | } | |
1407 | ||
6ef4852b | 1408 | static const struct usb_device_id usblp_ids[] = { |
1da177e4 LT |
1409 | { USB_DEVICE_INFO(7, 1, 1) }, |
1410 | { USB_DEVICE_INFO(7, 1, 2) }, | |
1411 | { USB_DEVICE_INFO(7, 1, 3) }, | |
1412 | { USB_INTERFACE_INFO(7, 1, 1) }, | |
1413 | { USB_INTERFACE_INFO(7, 1, 2) }, | |
1414 | { USB_INTERFACE_INFO(7, 1, 3) }, | |
5ec71db5 | 1415 | { USB_DEVICE(0x04b8, 0x0202) }, /* Seiko Epson Receipt Printer M129C */ |
1da177e4 LT |
1416 | { } /* Terminating entry */ |
1417 | }; | |
1418 | ||
916de027 | 1419 | MODULE_DEVICE_TABLE(usb, usblp_ids); |
1da177e4 LT |
1420 | |
1421 | static struct usb_driver usblp_driver = { | |
1da177e4 LT |
1422 | .name = "usblp", |
1423 | .probe = usblp_probe, | |
1424 | .disconnect = usblp_disconnect, | |
516077c1 ON |
1425 | .suspend = usblp_suspend, |
1426 | .resume = usblp_resume, | |
1da177e4 | 1427 | .id_table = usblp_ids, |
d0532184 | 1428 | .supports_autosuspend = 1, |
1da177e4 LT |
1429 | }; |
1430 | ||
65db4305 | 1431 | module_usb_driver(usblp_driver); |
1da177e4 | 1432 | |
916de027 NK |
1433 | MODULE_AUTHOR(DRIVER_AUTHOR); |
1434 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1da177e4 LT |
1435 | module_param(proto_bias, int, S_IRUGO | S_IWUSR); |
1436 | MODULE_PARM_DESC(proto_bias, "Favourite protocol number"); | |
1437 | MODULE_LICENSE("GPL"); |