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> | |
174cd4b1 | 52 | #include <linux/sched/signal.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> | |
298b992f | 60 | #include <linux/usb/ch9.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) | |
298b992f KO |
83 | /* The following ioctls were added for http://hpoj.sourceforge.net: |
84 | * Get two-int array: | |
85 | * [0]=current protocol | |
86 | * (1=USB_CLASS_PRINTER/1/1, 2=USB_CLASS_PRINTER/1/2, | |
87 | * 3=USB_CLASS_PRINTER/1/3), | |
88 | * [1]=supported protocol mask (mask&(1<<n)!=0 means | |
89 | * USB_CLASS_PRINTER/1/n supported): | |
90 | */ | |
1da177e4 | 91 | #define LPIOC_GET_PROTOCOLS(len) _IOC(_IOC_READ, 'P', IOCNR_GET_PROTOCOLS, len) |
298b992f KO |
92 | /* |
93 | * Set protocol | |
94 | * (arg: 1=USB_CLASS_PRINTER/1/1, 2=USB_CLASS_PRINTER/1/2, | |
95 | * 3=USB_CLASS_PRINTER/1/3): | |
96 | */ | |
1da177e4 LT |
97 | #define LPIOC_SET_PROTOCOL _IOC(_IOC_WRITE, 'P', IOCNR_SET_PROTOCOL, 0) |
98 | /* Set channel number (HP Vendor-specific command): */ | |
99 | #define LPIOC_HP_SET_CHANNEL _IOC(_IOC_WRITE, 'P', IOCNR_HP_SET_CHANNEL, 0) | |
100 | /* Get two-int array: [0]=bus number, [1]=device address: */ | |
101 | #define LPIOC_GET_BUS_ADDRESS(len) _IOC(_IOC_READ, 'P', IOCNR_GET_BUS_ADDRESS, len) | |
102 | /* Get two-int array: [0]=vendor ID, [1]=product ID: */ | |
103 | #define LPIOC_GET_VID_PID(len) _IOC(_IOC_READ, 'P', IOCNR_GET_VID_PID, len) | |
104 | /* Perform class specific soft reset */ | |
105 | #define LPIOC_SOFT_RESET _IOC(_IOC_NONE, 'P', IOCNR_SOFT_RESET, 0); | |
106 | ||
107 | /* | |
108 | * A DEVICE_ID string may include the printer's serial number. | |
109 | * It should end with a semi-colon (';'). | |
110 | * An example from an HP 970C DeskJet printer is (this is one long string, | |
111 | * with the serial number changed): | |
112 | 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: ; | |
113 | */ | |
114 | ||
115 | /* | |
116 | * USB Printer Requests | |
117 | */ | |
118 | ||
119 | #define USBLP_REQ_GET_ID 0x00 | |
120 | #define USBLP_REQ_GET_STATUS 0x01 | |
121 | #define USBLP_REQ_RESET 0x02 | |
122 | #define USBLP_REQ_HP_CHANNEL_CHANGE_REQUEST 0x00 /* HP Vendor-specific */ | |
123 | ||
124 | #define USBLP_MINORS 16 | |
125 | #define USBLP_MINOR_BASE 0 | |
126 | ||
283face8 | 127 | #define USBLP_CTL_TIMEOUT 5000 /* 5 seconds */ |
1da177e4 LT |
128 | |
129 | #define USBLP_FIRST_PROTOCOL 1 | |
130 | #define USBLP_LAST_PROTOCOL 3 | |
131 | #define USBLP_MAX_PROTOCOLS (USBLP_LAST_PROTOCOL+1) | |
132 | ||
133 | /* | |
134 | * some arbitrary status buffer size; | |
135 | * need a status buffer that is allocated via kmalloc(), not on stack | |
136 | */ | |
137 | #define STATUS_BUF_SIZE 8 | |
138 | ||
317c67b8 PZ |
139 | /* |
140 | * Locks down the locking order: | |
141 | * ->wmut locks wstatus. | |
142 | * ->mut locks the whole usblp, except [rw]complete, and thus, by indirection, | |
143 | * [rw]status. We only touch status when we know the side idle. | |
144 | * ->lock locks what interrupt accesses. | |
145 | */ | |
1da177e4 | 146 | struct usblp { |
916de027 | 147 | struct usb_device *dev; /* USB device */ |
317c67b8 PZ |
148 | struct mutex wmut; |
149 | struct mutex mut; | |
150 | spinlock_t lock; /* locks rcomplete, wcomplete */ | |
1da177e4 LT |
151 | char *readbuf; /* read transfer_buffer */ |
152 | char *statusbuf; /* status transfer_buffer */ | |
317c67b8 PZ |
153 | struct usb_anchor urbs; |
154 | wait_queue_head_t rwait, wwait; | |
1da177e4 LT |
155 | int readcount; /* Counter for reads */ |
156 | int ifnum; /* Interface number */ | |
157 | struct usb_interface *intf; /* The interface */ | |
298b992f KO |
158 | /* |
159 | * Alternate-setting numbers and endpoints for each protocol | |
160 | * (USB_CLASS_PRINTER/1/{index=1,2,3}) that the device supports: | |
161 | */ | |
1da177e4 LT |
162 | struct { |
163 | int alt_setting; | |
164 | struct usb_endpoint_descriptor *epwrite; | |
165 | struct usb_endpoint_descriptor *epread; | |
166 | } protocol[USBLP_MAX_PROTOCOLS]; | |
167 | int current_protocol; | |
168 | int minor; /* minor number of device */ | |
317c67b8 PZ |
169 | int wcomplete, rcomplete; |
170 | int wstatus; /* bytes written or error */ | |
171 | int rstatus; /* bytes ready or error */ | |
1da177e4 | 172 | unsigned int quirks; /* quirks flags */ |
7f477358 | 173 | unsigned int flags; /* mode flags */ |
1da177e4 LT |
174 | unsigned char used; /* True if open */ |
175 | unsigned char present; /* True if not disconnected */ | |
176 | unsigned char bidir; /* interface is bidirectional */ | |
7f477358 | 177 | unsigned char no_paper; /* Paper Out happened */ |
1da177e4 LT |
178 | unsigned char *device_id_string; /* IEEE 1284 DEVICE ID string (ptr) */ |
179 | /* first 2 bytes are (big-endian) length */ | |
180 | }; | |
181 | ||
182 | #ifdef DEBUG | |
916de027 NK |
183 | static void usblp_dump(struct usblp *usblp) |
184 | { | |
4f306309 | 185 | struct device *dev = &usblp->intf->dev; |
1da177e4 LT |
186 | int p; |
187 | ||
4f306309 GKH |
188 | dev_dbg(dev, "usblp=0x%p\n", usblp); |
189 | dev_dbg(dev, "dev=0x%p\n", usblp->dev); | |
190 | dev_dbg(dev, "present=%d\n", usblp->present); | |
191 | dev_dbg(dev, "readbuf=0x%p\n", usblp->readbuf); | |
192 | dev_dbg(dev, "readcount=%d\n", usblp->readcount); | |
193 | dev_dbg(dev, "ifnum=%d\n", usblp->ifnum); | |
194 | for (p = USBLP_FIRST_PROTOCOL; p <= USBLP_LAST_PROTOCOL; p++) { | |
195 | dev_dbg(dev, "protocol[%d].alt_setting=%d\n", p, | |
196 | usblp->protocol[p].alt_setting); | |
197 | dev_dbg(dev, "protocol[%d].epwrite=%p\n", p, | |
198 | usblp->protocol[p].epwrite); | |
199 | dev_dbg(dev, "protocol[%d].epread=%p\n", p, | |
200 | usblp->protocol[p].epread); | |
201 | } | |
202 | dev_dbg(dev, "current_protocol=%d\n", usblp->current_protocol); | |
203 | dev_dbg(dev, "minor=%d\n", usblp->minor); | |
204 | dev_dbg(dev, "wstatus=%d\n", usblp->wstatus); | |
205 | dev_dbg(dev, "rstatus=%d\n", usblp->rstatus); | |
206 | dev_dbg(dev, "quirks=%d\n", usblp->quirks); | |
207 | dev_dbg(dev, "used=%d\n", usblp->used); | |
208 | dev_dbg(dev, "bidir=%d\n", usblp->bidir); | |
209 | dev_dbg(dev, "device_id_string=\"%s\"\n", | |
1da177e4 LT |
210 | usblp->device_id_string ? |
211 | usblp->device_id_string + 2 : | |
212 | (unsigned char *)"(null)"); | |
213 | } | |
214 | #endif | |
215 | ||
216 | /* Quirks: various printer quirks are handled by this table & its flags. */ | |
217 | ||
218 | struct quirk_printer_struct { | |
219 | __u16 vendorId; | |
220 | __u16 productId; | |
221 | unsigned int quirks; | |
222 | }; | |
223 | ||
224 | #define USBLP_QUIRK_BIDIR 0x1 /* reports bidir but requires unidirectional mode (no INs/reads) */ | |
225 | #define USBLP_QUIRK_USB_INIT 0x2 /* needs vendor USB init string */ | |
5ec71db5 | 226 | #define USBLP_QUIRK_BAD_CLASS 0x4 /* descriptor uses vendor-specific Class or SubClass */ |
1da177e4 | 227 | |
4c4c9432 | 228 | static const struct quirk_printer_struct quirk_printers[] = { |
1da177e4 LT |
229 | { 0x03f0, 0x0004, USBLP_QUIRK_BIDIR }, /* HP DeskJet 895C */ |
230 | { 0x03f0, 0x0104, USBLP_QUIRK_BIDIR }, /* HP DeskJet 880C */ | |
231 | { 0x03f0, 0x0204, USBLP_QUIRK_BIDIR }, /* HP DeskJet 815C */ | |
232 | { 0x03f0, 0x0304, USBLP_QUIRK_BIDIR }, /* HP DeskJet 810C/812C */ | |
233 | { 0x03f0, 0x0404, USBLP_QUIRK_BIDIR }, /* HP DeskJet 830C */ | |
234 | { 0x03f0, 0x0504, USBLP_QUIRK_BIDIR }, /* HP DeskJet 885C */ | |
916de027 NK |
235 | { 0x03f0, 0x0604, USBLP_QUIRK_BIDIR }, /* HP DeskJet 840C */ |
236 | { 0x03f0, 0x0804, USBLP_QUIRK_BIDIR }, /* HP DeskJet 816C */ | |
1da177e4 LT |
237 | { 0x03f0, 0x1104, USBLP_QUIRK_BIDIR }, /* HP Deskjet 959C */ |
238 | { 0x0409, 0xefbe, USBLP_QUIRK_BIDIR }, /* NEC Picty900 (HP OEM) */ | |
239 | { 0x0409, 0xbef4, USBLP_QUIRK_BIDIR }, /* NEC Picty760 (HP OEM) */ | |
240 | { 0x0409, 0xf0be, USBLP_QUIRK_BIDIR }, /* NEC Picty920 (HP OEM) */ | |
241 | { 0x0409, 0xf1be, USBLP_QUIRK_BIDIR }, /* NEC Picty800 (HP OEM) */ | |
4f45d038 | 242 | { 0x0482, 0x0010, USBLP_QUIRK_BIDIR }, /* Kyocera Mita FS 820, by zut <kernel@zut.de> */ |
06a743bf | 243 | { 0x04f9, 0x000d, USBLP_QUIRK_BIDIR }, /* Brother Industries, Ltd HL-1440 Laser Printer */ |
5ec71db5 | 244 | { 0x04b8, 0x0202, USBLP_QUIRK_BAD_CLASS }, /* Seiko Epson Receipt Printer M129C */ |
1da177e4 LT |
245 | { 0, 0 } |
246 | }; | |
247 | ||
317c67b8 PZ |
248 | static int usblp_wwait(struct usblp *usblp, int nonblock); |
249 | static int usblp_wtest(struct usblp *usblp, int nonblock); | |
250 | static int usblp_rwait_and_lock(struct usblp *usblp, int nonblock); | |
251 | static int usblp_rtest(struct usblp *usblp, int nonblock); | |
252 | static int usblp_submit_read(struct usblp *usblp); | |
1da177e4 LT |
253 | static int usblp_select_alts(struct usblp *usblp); |
254 | static int usblp_set_protocol(struct usblp *usblp, int protocol); | |
255 | static int usblp_cache_device_id_string(struct usblp *usblp); | |
256 | ||
257 | /* forward reference to make our lives easier */ | |
258 | static struct usb_driver usblp_driver; | |
4186ecf8 | 259 | static DEFINE_MUTEX(usblp_mutex); /* locks the existence of usblp's */ |
1da177e4 LT |
260 | |
261 | /* | |
262 | * Functions for usblp control messages. | |
263 | */ | |
264 | ||
265 | static int usblp_ctrl_msg(struct usblp *usblp, int request, int type, int dir, int recip, int value, void *buf, int len) | |
266 | { | |
267 | int retval; | |
268 | int index = usblp->ifnum; | |
269 | ||
270 | /* High byte has the interface index. | |
271 | Low byte has the alternate setting. | |
272 | */ | |
916de027 NK |
273 | if ((request == USBLP_REQ_GET_ID) && (type == USB_TYPE_CLASS)) |
274 | index = (usblp->ifnum<<8)|usblp->protocol[usblp->current_protocol].alt_setting; | |
1da177e4 LT |
275 | |
276 | retval = usb_control_msg(usblp->dev, | |
277 | dir ? usb_rcvctrlpipe(usblp->dev, 0) : usb_sndctrlpipe(usblp->dev, 0), | |
283face8 | 278 | request, type | dir | recip, value, index, buf, len, USBLP_CTL_TIMEOUT); |
4f306309 GKH |
279 | dev_dbg(&usblp->intf->dev, |
280 | "usblp_control_msg: rq: 0x%02x dir: %d recip: %d value: %d idx: %d len: %#x result: %d\n", | |
1da177e4 LT |
281 | request, !!dir, recip, value, index, len, retval); |
282 | return retval < 0 ? retval : 0; | |
283 | } | |
284 | ||
285 | #define usblp_read_status(usblp, status)\ | |
286 | usblp_ctrl_msg(usblp, USBLP_REQ_GET_STATUS, USB_TYPE_CLASS, USB_DIR_IN, USB_RECIP_INTERFACE, 0, status, 1) | |
287 | #define usblp_get_id(usblp, config, id, maxlen)\ | |
288 | usblp_ctrl_msg(usblp, USBLP_REQ_GET_ID, USB_TYPE_CLASS, USB_DIR_IN, USB_RECIP_INTERFACE, config, id, maxlen) | |
289 | #define usblp_reset(usblp)\ | |
290 | usblp_ctrl_msg(usblp, USBLP_REQ_RESET, USB_TYPE_CLASS, USB_DIR_OUT, USB_RECIP_OTHER, 0, NULL, 0) | |
291 | ||
292 | #define usblp_hp_channel_change_request(usblp, channel, buffer) \ | |
293 | usblp_ctrl_msg(usblp, USBLP_REQ_HP_CHANNEL_CHANGE_REQUEST, USB_TYPE_VENDOR, USB_DIR_IN, USB_RECIP_INTERFACE, channel, buffer, 1) | |
294 | ||
295 | /* | |
296 | * See the description for usblp_select_alts() below for the usage | |
297 | * explanation. Look into your /proc/bus/usb/devices and dmesg in | |
298 | * case of any trouble. | |
299 | */ | |
300 | static int proto_bias = -1; | |
301 | ||
302 | /* | |
303 | * URB callback. | |
304 | */ | |
305 | ||
7d12e780 | 306 | static void usblp_bulk_read(struct urb *urb) |
1da177e4 LT |
307 | { |
308 | struct usblp *usblp = urb->context; | |
18ac3016 | 309 | int status = urb->status; |
1da177e4 | 310 | |
317c67b8 | 311 | if (usblp->present && usblp->used) { |
18ac3016 | 312 | if (status) |
317c67b8 PZ |
313 | printk(KERN_WARNING "usblp%d: " |
314 | "nonzero read bulk status received: %d\n", | |
18ac3016 | 315 | usblp->minor, status); |
317c67b8 PZ |
316 | } |
317 | spin_lock(&usblp->lock); | |
18ac3016 GKH |
318 | if (status < 0) |
319 | usblp->rstatus = status; | |
317c67b8 PZ |
320 | else |
321 | usblp->rstatus = urb->actual_length; | |
1da177e4 | 322 | usblp->rcomplete = 1; |
317c67b8 PZ |
323 | wake_up(&usblp->rwait); |
324 | spin_unlock(&usblp->lock); | |
325 | ||
326 | usb_free_urb(urb); | |
1da177e4 LT |
327 | } |
328 | ||
7d12e780 | 329 | static void usblp_bulk_write(struct urb *urb) |
1da177e4 LT |
330 | { |
331 | struct usblp *usblp = urb->context; | |
18ac3016 | 332 | int status = urb->status; |
1da177e4 | 333 | |
317c67b8 | 334 | if (usblp->present && usblp->used) { |
18ac3016 | 335 | if (status) |
317c67b8 PZ |
336 | printk(KERN_WARNING "usblp%d: " |
337 | "nonzero write bulk status received: %d\n", | |
18ac3016 | 338 | usblp->minor, status); |
317c67b8 PZ |
339 | } |
340 | spin_lock(&usblp->lock); | |
18ac3016 GKH |
341 | if (status < 0) |
342 | usblp->wstatus = status; | |
317c67b8 PZ |
343 | else |
344 | usblp->wstatus = urb->actual_length; | |
7f477358 | 345 | usblp->no_paper = 0; |
1da177e4 | 346 | usblp->wcomplete = 1; |
317c67b8 PZ |
347 | wake_up(&usblp->wwait); |
348 | spin_unlock(&usblp->lock); | |
349 | ||
317c67b8 | 350 | usb_free_urb(urb); |
1da177e4 LT |
351 | } |
352 | ||
353 | /* | |
354 | * Get and print printer errors. | |
355 | */ | |
356 | ||
4c4c9432 | 357 | static const char *usblp_messages[] = { "ok", "out of paper", "off-line", "on fire" }; |
1da177e4 LT |
358 | |
359 | static int usblp_check_status(struct usblp *usblp, int err) | |
360 | { | |
361 | unsigned char status, newerr = 0; | |
362 | int error; | |
363 | ||
fc401e69 PZ |
364 | mutex_lock(&usblp->mut); |
365 | if ((error = usblp_read_status(usblp, usblp->statusbuf)) < 0) { | |
366 | mutex_unlock(&usblp->mut); | |
305e7be5 | 367 | printk_ratelimited(KERN_ERR |
317c67b8 | 368 | "usblp%d: error %d reading printer status\n", |
0bc8e009 | 369 | usblp->minor, error); |
1da177e4 LT |
370 | return 0; |
371 | } | |
1da177e4 | 372 | status = *usblp->statusbuf; |
fc401e69 | 373 | mutex_unlock(&usblp->mut); |
1da177e4 LT |
374 | |
375 | if (~status & LP_PERRORP) | |
376 | newerr = 3; | |
377 | if (status & LP_POUTPA) | |
378 | newerr = 1; | |
379 | if (~status & LP_PSELECD) | |
380 | newerr = 2; | |
381 | ||
317c67b8 PZ |
382 | if (newerr != err) { |
383 | printk(KERN_INFO "usblp%d: %s\n", | |
384 | usblp->minor, usblp_messages[newerr]); | |
385 | } | |
1da177e4 LT |
386 | |
387 | return newerr; | |
388 | } | |
389 | ||
916de027 | 390 | static int handle_bidir(struct usblp *usblp) |
516077c1 | 391 | { |
3a90f818 | 392 | if (usblp->bidir && usblp->used) { |
317c67b8 | 393 | if (usblp_submit_read(usblp) < 0) |
516077c1 | 394 | return -EIO; |
516077c1 | 395 | } |
516077c1 ON |
396 | return 0; |
397 | } | |
398 | ||
1da177e4 LT |
399 | /* |
400 | * File op functions. | |
401 | */ | |
402 | ||
403 | static int usblp_open(struct inode *inode, struct file *file) | |
404 | { | |
405 | int minor = iminor(inode); | |
406 | struct usblp *usblp; | |
407 | struct usb_interface *intf; | |
408 | int retval; | |
409 | ||
410 | if (minor < 0) | |
411 | return -ENODEV; | |
412 | ||
916de027 | 413 | mutex_lock(&usblp_mutex); |
1da177e4 LT |
414 | |
415 | retval = -ENODEV; | |
416 | intf = usb_find_interface(&usblp_driver, minor); | |
916de027 | 417 | if (!intf) |
1da177e4 | 418 | goto out; |
916de027 | 419 | usblp = usb_get_intfdata(intf); |
1da177e4 LT |
420 | if (!usblp || !usblp->dev || !usblp->present) |
421 | goto out; | |
422 | ||
423 | retval = -EBUSY; | |
424 | if (usblp->used) | |
425 | goto out; | |
426 | ||
427 | /* | |
7f477358 PZ |
428 | * We do not implement LP_ABORTOPEN/LPABORTOPEN for two reasons: |
429 | * - We do not want persistent state which close(2) does not clear | |
430 | * - It is not used anyway, according to CUPS people | |
1da177e4 | 431 | */ |
1da177e4 | 432 | |
d0532184 ON |
433 | retval = usb_autopm_get_interface(intf); |
434 | if (retval < 0) | |
435 | goto out; | |
1da177e4 LT |
436 | usblp->used = 1; |
437 | file->private_data = usblp; | |
438 | ||
1da177e4 | 439 | usblp->wcomplete = 1; /* we begin writeable */ |
317c67b8 | 440 | usblp->wstatus = 0; |
1da177e4 LT |
441 | usblp->rcomplete = 0; |
442 | ||
516077c1 | 443 | if (handle_bidir(usblp) < 0) { |
19028690 | 444 | usb_autopm_put_interface(intf); |
97cb95d1 | 445 | usblp->used = 0; |
516077c1 ON |
446 | file->private_data = NULL; |
447 | retval = -EIO; | |
1da177e4 LT |
448 | } |
449 | out: | |
916de027 | 450 | mutex_unlock(&usblp_mutex); |
1da177e4 LT |
451 | return retval; |
452 | } | |
453 | ||
916de027 | 454 | static void usblp_cleanup(struct usblp *usblp) |
1da177e4 | 455 | { |
317c67b8 | 456 | printk(KERN_INFO "usblp%d: removed\n", usblp->minor); |
1da177e4 | 457 | |
317c67b8 | 458 | kfree(usblp->readbuf); |
916de027 NK |
459 | kfree(usblp->device_id_string); |
460 | kfree(usblp->statusbuf); | |
461 | kfree(usblp); | |
1da177e4 LT |
462 | } |
463 | ||
464 | static void usblp_unlink_urbs(struct usblp *usblp) | |
465 | { | |
317c67b8 | 466 | usb_kill_anchored_urbs(&usblp->urbs); |
1da177e4 LT |
467 | } |
468 | ||
469 | static int usblp_release(struct inode *inode, struct file *file) | |
470 | { | |
471 | struct usblp *usblp = file->private_data; | |
472 | ||
7f477358 PZ |
473 | usblp->flags &= ~LP_ABORT; |
474 | ||
916de027 | 475 | mutex_lock(&usblp_mutex); |
1da177e4 LT |
476 | usblp->used = 0; |
477 | if (usblp->present) { | |
478 | usblp_unlink_urbs(usblp); | |
d0532184 | 479 | usb_autopm_put_interface(usblp->intf); |
916de027 NK |
480 | } else /* finish cleanup from disconnect */ |
481 | usblp_cleanup(usblp); | |
482 | mutex_unlock(&usblp_mutex); | |
1da177e4 LT |
483 | return 0; |
484 | } | |
485 | ||
486 | /* No kernel lock - fine */ | |
487 | static unsigned int usblp_poll(struct file *file, struct poll_table_struct *wait) | |
488 | { | |
317c67b8 PZ |
489 | int ret; |
490 | unsigned long flags; | |
491 | ||
1da177e4 | 492 | struct usblp *usblp = file->private_data; |
317c67b8 PZ |
493 | /* Should we check file->f_mode & FMODE_WRITE before poll_wait()? */ |
494 | poll_wait(file, &usblp->rwait, wait); | |
495 | poll_wait(file, &usblp->wwait, wait); | |
496 | spin_lock_irqsave(&usblp->lock, flags); | |
283face8 PZ |
497 | ret = ((usblp->bidir && usblp->rcomplete) ? POLLIN | POLLRDNORM : 0) | |
498 | ((usblp->no_paper || usblp->wcomplete) ? POLLOUT | POLLWRNORM : 0); | |
317c67b8 PZ |
499 | spin_unlock_irqrestore(&usblp->lock, flags); |
500 | return ret; | |
1da177e4 LT |
501 | } |
502 | ||
318e479e | 503 | static long usblp_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
1da177e4 LT |
504 | { |
505 | struct usblp *usblp = file->private_data; | |
506 | int length, err, i; | |
507 | unsigned char newChannel; | |
508 | int status; | |
509 | int twoints[2]; | |
510 | int retval = 0; | |
511 | ||
916de027 | 512 | mutex_lock(&usblp->mut); |
1da177e4 LT |
513 | if (!usblp->present) { |
514 | retval = -ENODEV; | |
515 | goto done; | |
516 | } | |
517 | ||
4f306309 GKH |
518 | dev_dbg(&usblp->intf->dev, |
519 | "usblp_ioctl: cmd=0x%x (%c nr=%d len=%d dir=%d)\n", cmd, | |
520 | _IOC_TYPE(cmd), _IOC_NR(cmd), _IOC_SIZE(cmd), _IOC_DIR(cmd)); | |
1da177e4 LT |
521 | |
522 | if (_IOC_TYPE(cmd) == 'P') /* new-style ioctl number */ | |
523 | ||
524 | switch (_IOC_NR(cmd)) { | |
525 | ||
916de027 NK |
526 | case IOCNR_GET_DEVICE_ID: /* get the DEVICE_ID string */ |
527 | if (_IOC_DIR(cmd) != _IOC_READ) { | |
528 | retval = -EINVAL; | |
529 | goto done; | |
530 | } | |
1da177e4 | 531 | |
916de027 NK |
532 | length = usblp_cache_device_id_string(usblp); |
533 | if (length < 0) { | |
534 | retval = length; | |
535 | goto done; | |
536 | } | |
537 | if (length > _IOC_SIZE(cmd)) | |
538 | length = _IOC_SIZE(cmd); /* truncate */ | |
539 | ||
540 | if (copy_to_user((void __user *) arg, | |
541 | usblp->device_id_string, | |
542 | (unsigned long) length)) { | |
543 | retval = -EFAULT; | |
544 | goto done; | |
545 | } | |
1da177e4 | 546 | |
916de027 | 547 | break; |
1da177e4 | 548 | |
916de027 NK |
549 | case IOCNR_GET_PROTOCOLS: |
550 | if (_IOC_DIR(cmd) != _IOC_READ || | |
551 | _IOC_SIZE(cmd) < sizeof(twoints)) { | |
552 | retval = -EINVAL; | |
553 | goto done; | |
554 | } | |
1da177e4 | 555 | |
916de027 NK |
556 | twoints[0] = usblp->current_protocol; |
557 | twoints[1] = 0; | |
558 | for (i = USBLP_FIRST_PROTOCOL; | |
559 | i <= USBLP_LAST_PROTOCOL; i++) { | |
560 | if (usblp->protocol[i].alt_setting >= 0) | |
561 | twoints[1] |= (1<<i); | |
562 | } | |
1da177e4 | 563 | |
916de027 NK |
564 | if (copy_to_user((void __user *)arg, |
565 | (unsigned char *)twoints, | |
566 | sizeof(twoints))) { | |
567 | retval = -EFAULT; | |
568 | goto done; | |
569 | } | |
1da177e4 | 570 | |
916de027 | 571 | break; |
1da177e4 | 572 | |
916de027 NK |
573 | case IOCNR_SET_PROTOCOL: |
574 | if (_IOC_DIR(cmd) != _IOC_WRITE) { | |
575 | retval = -EINVAL; | |
576 | goto done; | |
577 | } | |
1da177e4 LT |
578 | |
579 | #ifdef DEBUG | |
916de027 NK |
580 | if (arg == -10) { |
581 | usblp_dump(usblp); | |
582 | break; | |
583 | } | |
1da177e4 LT |
584 | #endif |
585 | ||
916de027 NK |
586 | usblp_unlink_urbs(usblp); |
587 | retval = usblp_set_protocol(usblp, arg); | |
588 | if (retval < 0) { | |
589 | usblp_set_protocol(usblp, | |
590 | usblp->current_protocol); | |
591 | } | |
592 | break; | |
1da177e4 | 593 | |
916de027 NK |
594 | case IOCNR_HP_SET_CHANNEL: |
595 | if (_IOC_DIR(cmd) != _IOC_WRITE || | |
596 | le16_to_cpu(usblp->dev->descriptor.idVendor) != 0x03F0 || | |
597 | usblp->quirks & USBLP_QUIRK_BIDIR) { | |
598 | retval = -EINVAL; | |
599 | goto done; | |
600 | } | |
1da177e4 | 601 | |
916de027 NK |
602 | err = usblp_hp_channel_change_request(usblp, |
603 | arg, &newChannel); | |
604 | if (err < 0) { | |
605 | dev_err(&usblp->dev->dev, | |
606 | "usblp%d: error = %d setting " | |
607 | "HP channel\n", | |
608 | usblp->minor, err); | |
609 | retval = -EIO; | |
610 | goto done; | |
611 | } | |
1da177e4 | 612 | |
4f306309 GKH |
613 | dev_dbg(&usblp->intf->dev, |
614 | "usblp%d requested/got HP channel %ld/%d\n", | |
916de027 NK |
615 | usblp->minor, arg, newChannel); |
616 | break; | |
1da177e4 | 617 | |
916de027 NK |
618 | case IOCNR_GET_BUS_ADDRESS: |
619 | if (_IOC_DIR(cmd) != _IOC_READ || | |
620 | _IOC_SIZE(cmd) < sizeof(twoints)) { | |
621 | retval = -EINVAL; | |
622 | goto done; | |
623 | } | |
1da177e4 | 624 | |
916de027 NK |
625 | twoints[0] = usblp->dev->bus->busnum; |
626 | twoints[1] = usblp->dev->devnum; | |
627 | if (copy_to_user((void __user *)arg, | |
628 | (unsigned char *)twoints, | |
629 | sizeof(twoints))) { | |
630 | retval = -EFAULT; | |
631 | goto done; | |
632 | } | |
1da177e4 | 633 | |
4f306309 GKH |
634 | dev_dbg(&usblp->intf->dev, |
635 | "usblp%d is bus=%d, device=%d\n", | |
916de027 NK |
636 | usblp->minor, twoints[0], twoints[1]); |
637 | break; | |
1da177e4 | 638 | |
916de027 NK |
639 | case IOCNR_GET_VID_PID: |
640 | if (_IOC_DIR(cmd) != _IOC_READ || | |
641 | _IOC_SIZE(cmd) < sizeof(twoints)) { | |
642 | retval = -EINVAL; | |
643 | goto done; | |
644 | } | |
1da177e4 | 645 | |
916de027 NK |
646 | twoints[0] = le16_to_cpu(usblp->dev->descriptor.idVendor); |
647 | twoints[1] = le16_to_cpu(usblp->dev->descriptor.idProduct); | |
648 | if (copy_to_user((void __user *)arg, | |
649 | (unsigned char *)twoints, | |
650 | sizeof(twoints))) { | |
651 | retval = -EFAULT; | |
652 | goto done; | |
653 | } | |
1da177e4 | 654 | |
4f306309 GKH |
655 | dev_dbg(&usblp->intf->dev, |
656 | "usblp%d is VID=0x%4.4X, PID=0x%4.4X\n", | |
916de027 NK |
657 | usblp->minor, twoints[0], twoints[1]); |
658 | break; | |
1da177e4 | 659 | |
916de027 NK |
660 | case IOCNR_SOFT_RESET: |
661 | if (_IOC_DIR(cmd) != _IOC_NONE) { | |
662 | retval = -EINVAL; | |
663 | goto done; | |
664 | } | |
665 | retval = usblp_reset(usblp); | |
666 | break; | |
667 | default: | |
668 | retval = -ENOTTY; | |
1da177e4 LT |
669 | } |
670 | else /* old-style ioctl value */ | |
671 | switch (cmd) { | |
672 | ||
916de027 | 673 | case LPGETSTATUS: |
2fcdbdfd GKH |
674 | retval = usblp_read_status(usblp, usblp->statusbuf); |
675 | if (retval) { | |
305e7be5 | 676 | printk_ratelimited(KERN_ERR "usblp%d:" |
916de027 NK |
677 | "failed reading printer status (%d)\n", |
678 | usblp->minor, retval); | |
679 | retval = -EIO; | |
680 | goto done; | |
681 | } | |
682 | status = *usblp->statusbuf; | |
683 | if (copy_to_user((void __user *)arg, &status, sizeof(int))) | |
684 | retval = -EFAULT; | |
685 | break; | |
1da177e4 | 686 | |
916de027 NK |
687 | case LPABORT: |
688 | if (arg) | |
689 | usblp->flags |= LP_ABORT; | |
690 | else | |
691 | usblp->flags &= ~LP_ABORT; | |
692 | break; | |
7f477358 | 693 | |
916de027 NK |
694 | default: |
695 | retval = -ENOTTY; | |
1da177e4 LT |
696 | } |
697 | ||
698 | done: | |
916de027 | 699 | mutex_unlock(&usblp->mut); |
1da177e4 LT |
700 | return retval; |
701 | } | |
702 | ||
42cb967f PZ |
703 | static struct urb *usblp_new_writeurb(struct usblp *usblp, int transfer_length) |
704 | { | |
705 | struct urb *urb; | |
706 | char *writebuf; | |
707 | ||
2fcdbdfd GKH |
708 | writebuf = kmalloc(transfer_length, GFP_KERNEL); |
709 | if (writebuf == NULL) | |
42cb967f | 710 | return NULL; |
2fcdbdfd GKH |
711 | urb = usb_alloc_urb(0, GFP_KERNEL); |
712 | if (urb == NULL) { | |
42cb967f PZ |
713 | kfree(writebuf); |
714 | return NULL; | |
715 | } | |
716 | ||
717 | usb_fill_bulk_urb(urb, usblp->dev, | |
718 | usb_sndbulkpipe(usblp->dev, | |
719 | usblp->protocol[usblp->current_protocol].epwrite->bEndpointAddress), | |
720 | writebuf, transfer_length, usblp_bulk_write, usblp); | |
721 | urb->transfer_flags |= URB_FREE_BUFFER; | |
722 | ||
723 | return urb; | |
724 | } | |
725 | ||
1da177e4 LT |
726 | static ssize_t usblp_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos) |
727 | { | |
1da177e4 | 728 | struct usblp *usblp = file->private_data; |
317c67b8 PZ |
729 | struct urb *writeurb; |
730 | int rv; | |
731 | int transfer_length; | |
732 | ssize_t writecount = 0; | |
733 | ||
734 | if (mutex_lock_interruptible(&usblp->wmut)) { | |
735 | rv = -EINTR; | |
736 | goto raise_biglock; | |
737 | } | |
738 | if ((rv = usblp_wwait(usblp, !!(file->f_flags & O_NONBLOCK))) < 0) | |
739 | goto raise_wait; | |
1da177e4 LT |
740 | |
741 | while (writecount < count) { | |
317c67b8 PZ |
742 | /* |
743 | * Step 1: Submit next block. | |
1da177e4 | 744 | */ |
317c67b8 | 745 | if ((transfer_length = count - writecount) > USBLP_BUF_SIZE) |
1da177e4 LT |
746 | transfer_length = USBLP_BUF_SIZE; |
747 | ||
317c67b8 | 748 | rv = -ENOMEM; |
2fcdbdfd GKH |
749 | writeurb = usblp_new_writeurb(usblp, transfer_length); |
750 | if (writeurb == NULL) | |
317c67b8 | 751 | goto raise_urb; |
317c67b8 PZ |
752 | usb_anchor_urb(writeurb, &usblp->urbs); |
753 | ||
42cb967f | 754 | if (copy_from_user(writeurb->transfer_buffer, |
1da177e4 | 755 | buffer + writecount, transfer_length)) { |
317c67b8 PZ |
756 | rv = -EFAULT; |
757 | goto raise_badaddr; | |
1da177e4 LT |
758 | } |
759 | ||
317c67b8 | 760 | spin_lock_irq(&usblp->lock); |
1da177e4 | 761 | usblp->wcomplete = 0; |
317c67b8 PZ |
762 | spin_unlock_irq(&usblp->lock); |
763 | if ((rv = usb_submit_urb(writeurb, GFP_KERNEL)) < 0) { | |
764 | usblp->wstatus = 0; | |
765 | spin_lock_irq(&usblp->lock); | |
7f477358 | 766 | usblp->no_paper = 0; |
6c8df79f | 767 | usblp->wcomplete = 1; |
317c67b8 PZ |
768 | wake_up(&usblp->wwait); |
769 | spin_unlock_irq(&usblp->lock); | |
770 | if (rv != -ENOMEM) | |
771 | rv = -EIO; | |
772 | goto raise_submit; | |
773 | } | |
774 | ||
775 | /* | |
776 | * Step 2: Wait for transfer to end, collect results. | |
777 | */ | |
778 | rv = usblp_wwait(usblp, !!(file->f_flags&O_NONBLOCK)); | |
779 | if (rv < 0) { | |
10e48522 PZ |
780 | if (rv == -EAGAIN) { |
781 | /* Presume that it's going to complete well. */ | |
782 | writecount += transfer_length; | |
783 | } | |
7f477358 PZ |
784 | if (rv == -ENOSPC) { |
785 | spin_lock_irq(&usblp->lock); | |
786 | usblp->no_paper = 1; /* Mark for poll(2) */ | |
787 | spin_unlock_irq(&usblp->lock); | |
788 | writecount += transfer_length; | |
789 | } | |
10e48522 | 790 | /* Leave URB dangling, to be cleaned on close. */ |
317c67b8 | 791 | goto collect_error; |
1da177e4 | 792 | } |
317c67b8 PZ |
793 | |
794 | if (usblp->wstatus < 0) { | |
317c67b8 PZ |
795 | rv = -EIO; |
796 | goto collect_error; | |
797 | } | |
798 | /* | |
799 | * This is critical: it must be our URB, not other writer's. | |
800 | * The wmut exists mainly to cover us here. | |
801 | */ | |
802 | writecount += usblp->wstatus; | |
1da177e4 LT |
803 | } |
804 | ||
317c67b8 PZ |
805 | mutex_unlock(&usblp->wmut); |
806 | return writecount; | |
807 | ||
808 | raise_submit: | |
809 | raise_badaddr: | |
810 | usb_unanchor_urb(writeurb); | |
811 | usb_free_urb(writeurb); | |
812 | raise_urb: | |
317c67b8 PZ |
813 | raise_wait: |
814 | collect_error: /* Out of raise sequence */ | |
815 | mutex_unlock(&usblp->wmut); | |
816 | raise_biglock: | |
817 | return writecount ? writecount : rv; | |
1da177e4 LT |
818 | } |
819 | ||
317c67b8 PZ |
820 | /* |
821 | * Notice that we fail to restart in a few cases: on EFAULT, on restart | |
822 | * error, etc. This is the historical behaviour. In all such cases we return | |
823 | * EIO, and applications loop in order to get the new read going. | |
824 | */ | |
825 | static ssize_t usblp_read(struct file *file, char __user *buffer, size_t len, loff_t *ppos) | |
1da177e4 LT |
826 | { |
827 | struct usblp *usblp = file->private_data; | |
317c67b8 PZ |
828 | ssize_t count; |
829 | ssize_t avail; | |
830 | int rv; | |
1da177e4 LT |
831 | |
832 | if (!usblp->bidir) | |
833 | return -EINVAL; | |
834 | ||
317c67b8 PZ |
835 | rv = usblp_rwait_and_lock(usblp, !!(file->f_flags & O_NONBLOCK)); |
836 | if (rv < 0) | |
837 | return rv; | |
838 | ||
839 | if ((avail = usblp->rstatus) < 0) { | |
840 | printk(KERN_ERR "usblp%d: error %d reading from printer\n", | |
841 | usblp->minor, (int)avail); | |
842 | usblp_submit_read(usblp); | |
843 | count = -EIO; | |
1da177e4 LT |
844 | goto done; |
845 | } | |
846 | ||
317c67b8 PZ |
847 | count = len < avail - usblp->readcount ? len : avail - usblp->readcount; |
848 | if (count != 0 && | |
849 | copy_to_user(buffer, usblp->readbuf + usblp->readcount, count)) { | |
850 | count = -EFAULT; | |
851 | goto done; | |
852 | } | |
1da177e4 | 853 | |
317c67b8 PZ |
854 | if ((usblp->readcount += count) == avail) { |
855 | if (usblp_submit_read(usblp) < 0) { | |
856 | /* We don't want to leak USB return codes into errno. */ | |
857 | if (count == 0) | |
858 | count = -EIO; | |
8e695cdb | 859 | goto done; |
1da177e4 | 860 | } |
1da177e4 LT |
861 | } |
862 | ||
317c67b8 | 863 | done: |
916de027 | 864 | mutex_unlock(&usblp->mut); |
317c67b8 PZ |
865 | return count; |
866 | } | |
867 | ||
868 | /* | |
869 | * Wait for the write path to come idle. | |
870 | * This is called under the ->wmut, so the idle path stays idle. | |
871 | * | |
872 | * Our write path has a peculiar property: it does not buffer like a tty, | |
873 | * but waits for the write to succeed. This allows our ->release to bug out | |
874 | * without waiting for writes to drain. But it obviously does not work | |
875 | * when O_NONBLOCK is set. So, applications setting O_NONBLOCK must use | |
876 | * select(2) or poll(2) to wait for the buffer to drain before closing. | |
877 | * Alternatively, set blocking mode with fcntl and issue a zero-size write. | |
317c67b8 PZ |
878 | */ |
879 | static int usblp_wwait(struct usblp *usblp, int nonblock) | |
880 | { | |
881 | DECLARE_WAITQUEUE(waita, current); | |
882 | int rc; | |
7f477358 | 883 | int err = 0; |
317c67b8 PZ |
884 | |
885 | add_wait_queue(&usblp->wwait, &waita); | |
886 | for (;;) { | |
887 | if (mutex_lock_interruptible(&usblp->mut)) { | |
888 | rc = -EINTR; | |
889 | break; | |
890 | } | |
19cd80a2 | 891 | set_current_state(TASK_INTERRUPTIBLE); |
7f477358 | 892 | rc = usblp_wtest(usblp, nonblock); |
317c67b8 | 893 | mutex_unlock(&usblp->mut); |
7f477358 | 894 | if (rc <= 0) |
317c67b8 | 895 | break; |
7f477358 | 896 | |
dd44be6b PZ |
897 | if (schedule_timeout(msecs_to_jiffies(1500)) == 0) { |
898 | if (usblp->flags & LP_ABORT) { | |
7f477358 PZ |
899 | err = usblp_check_status(usblp, err); |
900 | if (err == 1) { /* Paper out */ | |
901 | rc = -ENOSPC; | |
902 | break; | |
903 | } | |
dd44be6b PZ |
904 | } else { |
905 | /* Prod the printer, Gentoo#251237. */ | |
906 | mutex_lock(&usblp->mut); | |
907 | usblp_read_status(usblp, usblp->statusbuf); | |
908 | mutex_unlock(&usblp->mut); | |
7f477358 | 909 | } |
7f477358 | 910 | } |
1da177e4 | 911 | } |
317c67b8 PZ |
912 | set_current_state(TASK_RUNNING); |
913 | remove_wait_queue(&usblp->wwait, &waita); | |
914 | return rc; | |
915 | } | |
1da177e4 | 916 | |
317c67b8 PZ |
917 | static int usblp_wtest(struct usblp *usblp, int nonblock) |
918 | { | |
919 | unsigned long flags; | |
920 | ||
921 | if (!usblp->present) | |
922 | return -ENODEV; | |
923 | if (signal_pending(current)) | |
924 | return -EINTR; | |
925 | spin_lock_irqsave(&usblp->lock, flags); | |
926 | if (usblp->wcomplete) { | |
927 | spin_unlock_irqrestore(&usblp->lock, flags); | |
928 | return 0; | |
516077c1 | 929 | } |
317c67b8 | 930 | spin_unlock_irqrestore(&usblp->lock, flags); |
317c67b8 PZ |
931 | if (nonblock) |
932 | return -EAGAIN; | |
933 | return 1; | |
934 | } | |
516077c1 | 935 | |
317c67b8 PZ |
936 | /* |
937 | * Wait for read bytes to become available. This probably should have been | |
938 | * called usblp_r_lock_and_wait(), because we lock first. But it's a traditional | |
939 | * name for functions which lock and return. | |
940 | * | |
941 | * We do not use wait_event_interruptible because it makes locking iffy. | |
942 | */ | |
943 | static int usblp_rwait_and_lock(struct usblp *usblp, int nonblock) | |
944 | { | |
945 | DECLARE_WAITQUEUE(waita, current); | |
946 | int rc; | |
947 | ||
948 | add_wait_queue(&usblp->rwait, &waita); | |
949 | for (;;) { | |
950 | if (mutex_lock_interruptible(&usblp->mut)) { | |
951 | rc = -EINTR; | |
952 | break; | |
953 | } | |
954 | set_current_state(TASK_INTERRUPTIBLE); | |
955 | if ((rc = usblp_rtest(usblp, nonblock)) < 0) { | |
956 | mutex_unlock(&usblp->mut); | |
957 | break; | |
958 | } | |
959 | if (rc == 0) /* Keep it locked */ | |
960 | break; | |
961 | mutex_unlock(&usblp->mut); | |
962 | schedule(); | |
1da177e4 | 963 | } |
317c67b8 PZ |
964 | set_current_state(TASK_RUNNING); |
965 | remove_wait_queue(&usblp->rwait, &waita); | |
966 | return rc; | |
967 | } | |
1da177e4 | 968 | |
317c67b8 PZ |
969 | static int usblp_rtest(struct usblp *usblp, int nonblock) |
970 | { | |
971 | unsigned long flags; | |
1da177e4 | 972 | |
317c67b8 PZ |
973 | if (!usblp->present) |
974 | return -ENODEV; | |
975 | if (signal_pending(current)) | |
976 | return -EINTR; | |
977 | spin_lock_irqsave(&usblp->lock, flags); | |
978 | if (usblp->rcomplete) { | |
979 | spin_unlock_irqrestore(&usblp->lock, flags); | |
980 | return 0; | |
1da177e4 | 981 | } |
317c67b8 | 982 | spin_unlock_irqrestore(&usblp->lock, flags); |
317c67b8 PZ |
983 | if (nonblock) |
984 | return -EAGAIN; | |
985 | return 1; | |
986 | } | |
1da177e4 | 987 | |
317c67b8 PZ |
988 | /* |
989 | * Please check ->bidir and other such things outside for now. | |
990 | */ | |
991 | static int usblp_submit_read(struct usblp *usblp) | |
992 | { | |
993 | struct urb *urb; | |
994 | unsigned long flags; | |
995 | int rc; | |
996 | ||
997 | rc = -ENOMEM; | |
2fcdbdfd GKH |
998 | urb = usb_alloc_urb(0, GFP_KERNEL); |
999 | if (urb == NULL) | |
317c67b8 PZ |
1000 | goto raise_urb; |
1001 | ||
1002 | usb_fill_bulk_urb(urb, usblp->dev, | |
1003 | usb_rcvbulkpipe(usblp->dev, | |
1004 | usblp->protocol[usblp->current_protocol].epread->bEndpointAddress), | |
1005 | usblp->readbuf, USBLP_BUF_SIZE_IN, | |
1006 | usblp_bulk_read, usblp); | |
1007 | usb_anchor_urb(urb, &usblp->urbs); | |
1008 | ||
1009 | spin_lock_irqsave(&usblp->lock, flags); | |
1010 | usblp->readcount = 0; /* XXX Why here? */ | |
1011 | usblp->rcomplete = 0; | |
1012 | spin_unlock_irqrestore(&usblp->lock, flags); | |
1013 | if ((rc = usb_submit_urb(urb, GFP_KERNEL)) < 0) { | |
4f306309 | 1014 | dev_dbg(&usblp->intf->dev, "error submitting urb (%d)\n", rc); |
317c67b8 PZ |
1015 | spin_lock_irqsave(&usblp->lock, flags); |
1016 | usblp->rstatus = rc; | |
1017 | usblp->rcomplete = 1; | |
1018 | spin_unlock_irqrestore(&usblp->lock, flags); | |
1019 | goto raise_submit; | |
1da177e4 LT |
1020 | } |
1021 | ||
317c67b8 PZ |
1022 | return 0; |
1023 | ||
1024 | raise_submit: | |
1025 | usb_unanchor_urb(urb); | |
1026 | usb_free_urb(urb); | |
1027 | raise_urb: | |
1028 | return rc; | |
1da177e4 LT |
1029 | } |
1030 | ||
1031 | /* | |
1032 | * Checks for printers that have quirks, such as requiring unidirectional | |
1033 | * communication but reporting bidirectional; currently some HP printers | |
1034 | * have this flaw (HP 810, 880, 895, etc.), or needing an init string | |
1035 | * sent at each open (like some Epsons). | |
1036 | * Returns 1 if found, 0 if not found. | |
1037 | * | |
1038 | * HP recommended that we use the bidirectional interface but | |
1039 | * don't attempt any bulk IN transfers from the IN endpoint. | |
1040 | * Here's some more detail on the problem: | |
1041 | * The problem is not that it isn't bidirectional though. The problem | |
1042 | * is that if you request a device ID, or status information, while | |
1043 | * the buffers are full, the return data will end up in the print data | |
1044 | * buffer. For example if you make sure you never request the device ID | |
1045 | * while you are sending print data, and you don't try to query the | |
1046 | * printer status every couple of milliseconds, you will probably be OK. | |
1047 | */ | |
916de027 | 1048 | static unsigned int usblp_quirks(__u16 vendor, __u16 product) |
1da177e4 LT |
1049 | { |
1050 | int i; | |
1051 | ||
1052 | for (i = 0; quirk_printers[i].vendorId; i++) { | |
1053 | if (vendor == quirk_printers[i].vendorId && | |
1054 | product == quirk_printers[i].productId) | |
1055 | return quirk_printers[i].quirks; | |
916de027 | 1056 | } |
1da177e4 LT |
1057 | return 0; |
1058 | } | |
1059 | ||
066202dd | 1060 | static const struct file_operations usblp_fops = { |
1da177e4 LT |
1061 | .owner = THIS_MODULE, |
1062 | .read = usblp_read, | |
1063 | .write = usblp_write, | |
1064 | .poll = usblp_poll, | |
318e479e PZ |
1065 | .unlocked_ioctl = usblp_ioctl, |
1066 | .compat_ioctl = usblp_ioctl, | |
1da177e4 LT |
1067 | .open = usblp_open, |
1068 | .release = usblp_release, | |
6038f373 | 1069 | .llseek = noop_llseek, |
1da177e4 LT |
1070 | }; |
1071 | ||
2c9ede55 | 1072 | static char *usblp_devnode(struct device *dev, umode_t *mode) |
f7a386c5 KS |
1073 | { |
1074 | return kasprintf(GFP_KERNEL, "usb/%s", dev_name(dev)); | |
1075 | } | |
1076 | ||
1da177e4 | 1077 | static struct usb_class_driver usblp_class = { |
d6e5bcf4 | 1078 | .name = "lp%d", |
e454cea2 | 1079 | .devnode = usblp_devnode, |
1da177e4 | 1080 | .fops = &usblp_fops, |
1da177e4 LT |
1081 | .minor_base = USBLP_MINOR_BASE, |
1082 | }; | |
1083 | ||
a9714c84 DW |
1084 | static ssize_t usblp_show_ieee1284_id(struct device *dev, struct device_attribute *attr, char *buf) |
1085 | { | |
1086 | struct usb_interface *intf = to_usb_interface(dev); | |
916de027 | 1087 | struct usblp *usblp = usb_get_intfdata(intf); |
a9714c84 DW |
1088 | |
1089 | if (usblp->device_id_string[0] == 0 && | |
1090 | usblp->device_id_string[1] == 0) | |
1091 | return 0; | |
1092 | ||
1093 | return sprintf(buf, "%s", usblp->device_id_string+2); | |
1094 | } | |
1095 | ||
1096 | static DEVICE_ATTR(ieee1284_id, S_IRUGO, usblp_show_ieee1284_id, NULL); | |
1097 | ||
1da177e4 LT |
1098 | static int usblp_probe(struct usb_interface *intf, |
1099 | const struct usb_device_id *id) | |
1100 | { | |
916de027 | 1101 | struct usb_device *dev = interface_to_usbdev(intf); |
49b707b9 | 1102 | struct usblp *usblp; |
1da177e4 LT |
1103 | int protocol; |
1104 | int retval; | |
1105 | ||
1106 | /* Malloc and start initializing usblp structure so we can use it | |
1107 | * directly. */ | |
49b707b9 JL |
1108 | usblp = kzalloc(sizeof(struct usblp), GFP_KERNEL); |
1109 | if (!usblp) { | |
317c67b8 | 1110 | retval = -ENOMEM; |
49b707b9 | 1111 | goto abort_ret; |
1da177e4 | 1112 | } |
1da177e4 | 1113 | usblp->dev = dev; |
317c67b8 | 1114 | mutex_init(&usblp->wmut); |
916de027 | 1115 | mutex_init(&usblp->mut); |
317c67b8 PZ |
1116 | spin_lock_init(&usblp->lock); |
1117 | init_waitqueue_head(&usblp->rwait); | |
1118 | init_waitqueue_head(&usblp->wwait); | |
1119 | init_usb_anchor(&usblp->urbs); | |
1da177e4 LT |
1120 | usblp->ifnum = intf->cur_altsetting->desc.bInterfaceNumber; |
1121 | usblp->intf = intf; | |
1122 | ||
1da177e4 LT |
1123 | /* Malloc device ID string buffer to the largest expected length, |
1124 | * since we can re-query it on an ioctl and a dynamic string | |
1125 | * could change in length. */ | |
1126 | if (!(usblp->device_id_string = kmalloc(USBLP_DEVICE_ID_SIZE, GFP_KERNEL))) { | |
317c67b8 | 1127 | retval = -ENOMEM; |
1da177e4 LT |
1128 | goto abort; |
1129 | } | |
1130 | ||
317c67b8 PZ |
1131 | /* |
1132 | * Allocate read buffer. We somewhat wastefully | |
1da177e4 | 1133 | * malloc both regardless of bidirectionality, because the |
317c67b8 PZ |
1134 | * alternate setting can be changed later via an ioctl. |
1135 | */ | |
1136 | if (!(usblp->readbuf = kmalloc(USBLP_BUF_SIZE_IN, GFP_KERNEL))) { | |
1137 | retval = -ENOMEM; | |
1da177e4 LT |
1138 | goto abort; |
1139 | } | |
1140 | ||
1141 | /* Allocate buffer for printer status */ | |
1142 | usblp->statusbuf = kmalloc(STATUS_BUF_SIZE, GFP_KERNEL); | |
1143 | if (!usblp->statusbuf) { | |
317c67b8 | 1144 | retval = -ENOMEM; |
1da177e4 LT |
1145 | goto abort; |
1146 | } | |
1147 | ||
1148 | /* Lookup quirks for this printer. */ | |
1149 | usblp->quirks = usblp_quirks( | |
1150 | le16_to_cpu(dev->descriptor.idVendor), | |
1151 | le16_to_cpu(dev->descriptor.idProduct)); | |
1152 | ||
1153 | /* Analyze and pick initial alternate settings and endpoints. */ | |
1154 | protocol = usblp_select_alts(usblp); | |
1155 | if (protocol < 0) { | |
4f306309 GKH |
1156 | dev_dbg(&intf->dev, |
1157 | "incompatible printer-class device 0x%4.4X/0x%4.4X\n", | |
1da177e4 LT |
1158 | le16_to_cpu(dev->descriptor.idVendor), |
1159 | le16_to_cpu(dev->descriptor.idProduct)); | |
317c67b8 | 1160 | retval = -ENODEV; |
1da177e4 LT |
1161 | goto abort; |
1162 | } | |
1163 | ||
1164 | /* Setup the selected alternate setting and endpoints. */ | |
317c67b8 PZ |
1165 | if (usblp_set_protocol(usblp, protocol) < 0) { |
1166 | retval = -ENODEV; /* ->probe isn't ->ioctl */ | |
1da177e4 | 1167 | goto abort; |
317c67b8 | 1168 | } |
1da177e4 LT |
1169 | |
1170 | /* Retrieve and store the device ID string. */ | |
1171 | usblp_cache_device_id_string(usblp); | |
96cede53 GKH |
1172 | retval = device_create_file(&intf->dev, &dev_attr_ieee1284_id); |
1173 | if (retval) | |
1174 | goto abort_intfdata; | |
1da177e4 LT |
1175 | |
1176 | #ifdef DEBUG | |
1177 | usblp_check_status(usblp, 0); | |
1178 | #endif | |
1179 | ||
916de027 | 1180 | usb_set_intfdata(intf, usblp); |
1da177e4 LT |
1181 | |
1182 | usblp->present = 1; | |
1183 | ||
1184 | retval = usb_register_dev(intf, &usblp_class); | |
1185 | if (retval) { | |
4f306309 GKH |
1186 | dev_err(&intf->dev, |
1187 | "usblp: Not able to get a minor (base %u, slice default): %d\n", | |
1188 | USBLP_MINOR_BASE, retval); | |
1da177e4 LT |
1189 | goto abort_intfdata; |
1190 | } | |
1191 | usblp->minor = intf->minor; | |
4f306309 GKH |
1192 | dev_info(&intf->dev, |
1193 | "usblp%d: USB %sdirectional printer dev %d if %d alt %d proto %d vid 0x%4.4X pid 0x%4.4X\n", | |
a9714c84 DW |
1194 | usblp->minor, usblp->bidir ? "Bi" : "Uni", dev->devnum, |
1195 | usblp->ifnum, | |
1196 | usblp->protocol[usblp->current_protocol].alt_setting, | |
1197 | usblp->current_protocol, | |
1198 | le16_to_cpu(usblp->dev->descriptor.idVendor), | |
1199 | le16_to_cpu(usblp->dev->descriptor.idProduct)); | |
1da177e4 LT |
1200 | |
1201 | return 0; | |
1202 | ||
1203 | abort_intfdata: | |
916de027 | 1204 | usb_set_intfdata(intf, NULL); |
a9714c84 | 1205 | device_remove_file(&intf->dev, &dev_attr_ieee1284_id); |
1da177e4 | 1206 | abort: |
49b707b9 JL |
1207 | kfree(usblp->readbuf); |
1208 | kfree(usblp->statusbuf); | |
1209 | kfree(usblp->device_id_string); | |
1210 | kfree(usblp); | |
1211 | abort_ret: | |
317c67b8 | 1212 | return retval; |
1da177e4 LT |
1213 | } |
1214 | ||
1215 | /* | |
1216 | * We are a "new" style driver with usb_device_id table, | |
1217 | * but our requirements are too intricate for simple match to handle. | |
1218 | * | |
1219 | * The "proto_bias" option may be used to specify the preferred protocol | |
298b992f KO |
1220 | * for all USB printers (1=USB_CLASS_PRINTER/1/1, 2=USB_CLASS_PRINTER/1/2, |
1221 | * 3=USB_CLASS_PRINTER/1/3). If the device supports the preferred protocol, | |
1222 | * then we bind to it. | |
1da177e4 | 1223 | * |
298b992f KO |
1224 | * The best interface for us is USB_CLASS_PRINTER/1/2, because it |
1225 | * is compatible with a stream of characters. If we find it, we bind to it. | |
1da177e4 LT |
1226 | * |
1227 | * Note that the people from hpoj.sourceforge.net need to be able to | |
298b992f KO |
1228 | * bind to USB_CLASS_PRINTER/1/3 (MLC/1284.4), so we provide them ioctls |
1229 | * for this purpose. | |
1da177e4 | 1230 | * |
298b992f KO |
1231 | * Failing USB_CLASS_PRINTER/1/2, we look for USB_CLASS_PRINTER/1/3, |
1232 | * even though it's probably not stream-compatible, because this matches | |
1233 | * the behaviour of the old code. | |
1da177e4 | 1234 | * |
298b992f KO |
1235 | * If nothing else, we bind to USB_CLASS_PRINTER/1/1 |
1236 | * - the unidirectional interface. | |
1da177e4 LT |
1237 | */ |
1238 | static int usblp_select_alts(struct usblp *usblp) | |
1239 | { | |
1240 | struct usb_interface *if_alt; | |
1241 | struct usb_host_interface *ifd; | |
1242 | struct usb_endpoint_descriptor *epd, *epwrite, *epread; | |
1243 | int p, i, e; | |
1244 | ||
1245 | if_alt = usblp->intf; | |
1246 | ||
1247 | for (p = 0; p < USBLP_MAX_PROTOCOLS; p++) | |
1248 | usblp->protocol[p].alt_setting = -1; | |
1249 | ||
1250 | /* Find out what we have. */ | |
1251 | for (i = 0; i < if_alt->num_altsetting; i++) { | |
1252 | ifd = &if_alt->altsetting[i]; | |
1253 | ||
298b992f KO |
1254 | if (ifd->desc.bInterfaceClass != USB_CLASS_PRINTER || |
1255 | ifd->desc.bInterfaceSubClass != 1) | |
5ec71db5 AS |
1256 | if (!(usblp->quirks & USBLP_QUIRK_BAD_CLASS)) |
1257 | continue; | |
1da177e4 LT |
1258 | |
1259 | if (ifd->desc.bInterfaceProtocol < USBLP_FIRST_PROTOCOL || | |
1260 | ifd->desc.bInterfaceProtocol > USBLP_LAST_PROTOCOL) | |
1261 | continue; | |
1262 | ||
1263 | /* Look for bulk OUT and IN endpoints. */ | |
1264 | epwrite = epread = NULL; | |
1265 | for (e = 0; e < ifd->desc.bNumEndpoints; e++) { | |
1266 | epd = &ifd->endpoint[e].desc; | |
1267 | ||
5bc66d53 | 1268 | if (usb_endpoint_is_bulk_out(epd)) |
1da177e4 LT |
1269 | if (!epwrite) |
1270 | epwrite = epd; | |
1271 | ||
5bc66d53 | 1272 | if (usb_endpoint_is_bulk_in(epd)) |
1da177e4 LT |
1273 | if (!epread) |
1274 | epread = epd; | |
1da177e4 LT |
1275 | } |
1276 | ||
1277 | /* Ignore buggy hardware without the right endpoints. */ | |
1278 | if (!epwrite || (ifd->desc.bInterfaceProtocol > 1 && !epread)) | |
1279 | continue; | |
1280 | ||
298b992f KO |
1281 | /* |
1282 | * Turn off reads for USB_CLASS_PRINTER/1/1 (unidirectional) | |
1283 | * interfaces and buggy bidirectional printers. | |
1284 | */ | |
1da177e4 LT |
1285 | if (ifd->desc.bInterfaceProtocol == 1) { |
1286 | epread = NULL; | |
1287 | } else if (usblp->quirks & USBLP_QUIRK_BIDIR) { | |
317c67b8 PZ |
1288 | printk(KERN_INFO "usblp%d: Disabling reads from " |
1289 | "problematic bidirectional printer\n", | |
1290 | usblp->minor); | |
1da177e4 LT |
1291 | epread = NULL; |
1292 | } | |
1293 | ||
1294 | usblp->protocol[ifd->desc.bInterfaceProtocol].alt_setting = | |
1295 | ifd->desc.bAlternateSetting; | |
1296 | usblp->protocol[ifd->desc.bInterfaceProtocol].epwrite = epwrite; | |
1297 | usblp->protocol[ifd->desc.bInterfaceProtocol].epread = epread; | |
1298 | } | |
1299 | ||
1300 | /* If our requested protocol is supported, then use it. */ | |
1301 | if (proto_bias >= USBLP_FIRST_PROTOCOL && | |
1302 | proto_bias <= USBLP_LAST_PROTOCOL && | |
1303 | usblp->protocol[proto_bias].alt_setting != -1) | |
1304 | return proto_bias; | |
1305 | ||
1306 | /* Ordering is important here. */ | |
1307 | if (usblp->protocol[2].alt_setting != -1) | |
1308 | return 2; | |
1309 | if (usblp->protocol[1].alt_setting != -1) | |
1310 | return 1; | |
1311 | if (usblp->protocol[3].alt_setting != -1) | |
1312 | return 3; | |
1313 | ||
1314 | /* If nothing is available, then don't bind to this device. */ | |
1315 | return -1; | |
1316 | } | |
1317 | ||
1318 | static int usblp_set_protocol(struct usblp *usblp, int protocol) | |
1319 | { | |
1320 | int r, alts; | |
1321 | ||
1322 | if (protocol < USBLP_FIRST_PROTOCOL || protocol > USBLP_LAST_PROTOCOL) | |
1323 | return -EINVAL; | |
1324 | ||
1325 | alts = usblp->protocol[protocol].alt_setting; | |
1326 | if (alts < 0) | |
1327 | return -EINVAL; | |
1328 | r = usb_set_interface(usblp->dev, usblp->ifnum, alts); | |
1329 | if (r < 0) { | |
317c67b8 | 1330 | printk(KERN_ERR "usblp: can't set desired altsetting %d on interface %d\n", |
1da177e4 LT |
1331 | alts, usblp->ifnum); |
1332 | return r; | |
1333 | } | |
1334 | ||
1da177e4 | 1335 | usblp->bidir = (usblp->protocol[protocol].epread != NULL); |
1da177e4 | 1336 | usblp->current_protocol = protocol; |
4f306309 GKH |
1337 | dev_dbg(&usblp->intf->dev, "usblp%d set protocol %d\n", |
1338 | usblp->minor, protocol); | |
1da177e4 LT |
1339 | return 0; |
1340 | } | |
1341 | ||
1342 | /* Retrieves and caches device ID string. | |
1343 | * Returns length, including length bytes but not null terminator. | |
1344 | * On error, returns a negative errno value. */ | |
1345 | static int usblp_cache_device_id_string(struct usblp *usblp) | |
1346 | { | |
1347 | int err, length; | |
1348 | ||
1349 | err = usblp_get_id(usblp, 0, usblp->device_id_string, USBLP_DEVICE_ID_SIZE - 1); | |
1350 | if (err < 0) { | |
4f306309 GKH |
1351 | dev_dbg(&usblp->intf->dev, |
1352 | "usblp%d: error = %d reading IEEE-1284 Device ID string\n", | |
1da177e4 LT |
1353 | usblp->minor, err); |
1354 | usblp->device_id_string[0] = usblp->device_id_string[1] = '\0'; | |
1355 | return -EIO; | |
1356 | } | |
1357 | ||
1358 | /* First two bytes are length in big-endian. | |
1359 | * They count themselves, and we copy them into | |
1360 | * the user's buffer. */ | |
1361 | length = be16_to_cpu(*((__be16 *)usblp->device_id_string)); | |
1362 | if (length < 2) | |
1363 | length = 2; | |
1364 | else if (length >= USBLP_DEVICE_ID_SIZE) | |
1365 | length = USBLP_DEVICE_ID_SIZE - 1; | |
1366 | usblp->device_id_string[length] = '\0'; | |
1367 | ||
4f306309 | 1368 | dev_dbg(&usblp->intf->dev, "usblp%d Device ID string [len=%d]=\"%s\"\n", |
1da177e4 LT |
1369 | usblp->minor, length, &usblp->device_id_string[2]); |
1370 | ||
1371 | return length; | |
1372 | } | |
1373 | ||
1374 | static void usblp_disconnect(struct usb_interface *intf) | |
1375 | { | |
916de027 | 1376 | struct usblp *usblp = usb_get_intfdata(intf); |
1da177e4 LT |
1377 | |
1378 | usb_deregister_dev(intf, &usblp_class); | |
1379 | ||
1380 | if (!usblp || !usblp->dev) { | |
9908a32e | 1381 | dev_err(&intf->dev, "bogus disconnect\n"); |
916de027 | 1382 | BUG(); |
1da177e4 LT |
1383 | } |
1384 | ||
a9714c84 DW |
1385 | device_remove_file(&intf->dev, &dev_attr_ieee1284_id); |
1386 | ||
916de027 NK |
1387 | mutex_lock(&usblp_mutex); |
1388 | mutex_lock(&usblp->mut); | |
1da177e4 | 1389 | usblp->present = 0; |
317c67b8 PZ |
1390 | wake_up(&usblp->wwait); |
1391 | wake_up(&usblp->rwait); | |
916de027 | 1392 | usb_set_intfdata(intf, NULL); |
1da177e4 LT |
1393 | |
1394 | usblp_unlink_urbs(usblp); | |
916de027 | 1395 | mutex_unlock(&usblp->mut); |
1da177e4 LT |
1396 | |
1397 | if (!usblp->used) | |
916de027 NK |
1398 | usblp_cleanup(usblp); |
1399 | mutex_unlock(&usblp_mutex); | |
1da177e4 LT |
1400 | } |
1401 | ||
3a90f818 | 1402 | static int usblp_suspend(struct usb_interface *intf, pm_message_t message) |
516077c1 | 1403 | { |
916de027 | 1404 | struct usblp *usblp = usb_get_intfdata(intf); |
516077c1 | 1405 | |
516077c1 | 1406 | usblp_unlink_urbs(usblp); |
317c67b8 PZ |
1407 | #if 0 /* XXX Do we want this? What if someone is reading, should we fail? */ |
1408 | /* not strictly necessary, but just in case */ | |
1409 | wake_up(&usblp->wwait); | |
1410 | wake_up(&usblp->rwait); | |
1411 | #endif | |
516077c1 ON |
1412 | |
1413 | return 0; | |
1414 | } | |
1415 | ||
3a90f818 | 1416 | static int usblp_resume(struct usb_interface *intf) |
516077c1 | 1417 | { |
916de027 | 1418 | struct usblp *usblp = usb_get_intfdata(intf); |
516077c1 ON |
1419 | int r; |
1420 | ||
916de027 | 1421 | r = handle_bidir(usblp); |
516077c1 | 1422 | |
516077c1 ON |
1423 | return r; |
1424 | } | |
1425 | ||
6ef4852b | 1426 | static const struct usb_device_id usblp_ids[] = { |
298b992f KO |
1427 | { USB_DEVICE_INFO(USB_CLASS_PRINTER, 1, 1) }, |
1428 | { USB_DEVICE_INFO(USB_CLASS_PRINTER, 1, 2) }, | |
1429 | { USB_DEVICE_INFO(USB_CLASS_PRINTER, 1, 3) }, | |
1430 | { USB_INTERFACE_INFO(USB_CLASS_PRINTER, 1, 1) }, | |
1431 | { USB_INTERFACE_INFO(USB_CLASS_PRINTER, 1, 2) }, | |
1432 | { USB_INTERFACE_INFO(USB_CLASS_PRINTER, 1, 3) }, | |
5ec71db5 | 1433 | { USB_DEVICE(0x04b8, 0x0202) }, /* Seiko Epson Receipt Printer M129C */ |
1da177e4 LT |
1434 | { } /* Terminating entry */ |
1435 | }; | |
1436 | ||
916de027 | 1437 | MODULE_DEVICE_TABLE(usb, usblp_ids); |
1da177e4 LT |
1438 | |
1439 | static struct usb_driver usblp_driver = { | |
1da177e4 LT |
1440 | .name = "usblp", |
1441 | .probe = usblp_probe, | |
1442 | .disconnect = usblp_disconnect, | |
516077c1 ON |
1443 | .suspend = usblp_suspend, |
1444 | .resume = usblp_resume, | |
1da177e4 | 1445 | .id_table = usblp_ids, |
d0532184 | 1446 | .supports_autosuspend = 1, |
1da177e4 LT |
1447 | }; |
1448 | ||
65db4305 | 1449 | module_usb_driver(usblp_driver); |
1da177e4 | 1450 | |
916de027 NK |
1451 | MODULE_AUTHOR(DRIVER_AUTHOR); |
1452 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1da177e4 LT |
1453 | module_param(proto_bias, int, S_IRUGO | S_IWUSR); |
1454 | MODULE_PARM_DESC(proto_bias, "Favourite protocol number"); | |
1455 | MODULE_LICENSE("GPL"); |