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Commit | Line | Data |
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5fd54ace | 1 | // SPDX-License-Identifier: GPL-2.0+ |
1da177e4 | 2 | /* |
317c67b8 | 3 | * usblp.c |
1da177e4 LT |
4 | * |
5 | * Copyright (c) 1999 Michael Gee <michael@linuxspecific.com> | |
a2531293 | 6 | * Copyright (c) 1999 Pavel Machek <pavel@ucw.cz> |
f4b09ebc | 7 | * Copyright (c) 2000 Randy Dunlap <rdunlap@xenotime.net> |
1da177e4 LT |
8 | * Copyright (c) 2000 Vojtech Pavlik <vojtech@suse.cz> |
9 | # Copyright (c) 2001 Pete Zaitcev <zaitcev@redhat.com> | |
10 | # Copyright (c) 2001 David Paschal <paschal@rcsis.com> | |
8e695cdb | 11 | * Copyright (c) 2006 Oliver Neukum <oliver@neukum.name> |
1da177e4 LT |
12 | * |
13 | * USB Printer Device Class driver for USB printers and printer cables | |
14 | * | |
15 | * Sponsored by SuSE | |
16 | * | |
17 | * ChangeLog: | |
18 | * v0.1 - thorough cleaning, URBification, almost a rewrite | |
19 | * v0.2 - some more cleanups | |
20 | * v0.3 - cleaner again, waitqueue fixes | |
21 | * v0.4 - fixes in unidirectional mode | |
22 | * v0.5 - add DEVICE_ID string support | |
23 | * v0.6 - never time out | |
24 | * v0.7 - fixed bulk-IN read and poll (David Paschal) | |
25 | * v0.8 - add devfs support | |
26 | * v0.9 - fix unplug-while-open paths | |
27 | * v0.10- remove sleep_on, fix error on oom (oliver@neukum.org) | |
28 | * v0.11 - add proto_bias option (Pete Zaitcev) | |
29 | * v0.12 - add hpoj.sourceforge.net ioctls (David Paschal) | |
30 | * v0.13 - alloc space for statusbuf (<status> not on stack); | |
997ea58e | 31 | * use usb_alloc_coherent() for read buf & write buf; |
283face8 | 32 | * none - Maintained in Linux kernel after v0.13 |
1da177e4 LT |
33 | */ |
34 | ||
1da177e4 LT |
35 | #include <linux/module.h> |
36 | #include <linux/kernel.h> | |
174cd4b1 | 37 | #include <linux/sched/signal.h> |
1da177e4 LT |
38 | #include <linux/signal.h> |
39 | #include <linux/poll.h> | |
1da177e4 LT |
40 | #include <linux/slab.h> |
41 | #include <linux/lp.h> | |
4186ecf8 | 42 | #include <linux/mutex.h> |
1da177e4 LT |
43 | #undef DEBUG |
44 | #include <linux/usb.h> | |
298b992f | 45 | #include <linux/usb/ch9.h> |
305e7be5 | 46 | #include <linux/ratelimit.h> |
1da177e4 LT |
47 | |
48 | /* | |
49 | * Version Information | |
50 | */ | |
1da177e4 LT |
51 | #define DRIVER_AUTHOR "Michael Gee, Pavel Machek, Vojtech Pavlik, Randy Dunlap, Pete Zaitcev, David Paschal" |
52 | #define DRIVER_DESC "USB Printer Device Class driver" | |
53 | ||
54 | #define USBLP_BUF_SIZE 8192 | |
317c67b8 | 55 | #define USBLP_BUF_SIZE_IN 1024 |
1da177e4 LT |
56 | #define USBLP_DEVICE_ID_SIZE 1024 |
57 | ||
58 | /* ioctls: */ | |
1da177e4 LT |
59 | #define IOCNR_GET_DEVICE_ID 1 |
60 | #define IOCNR_GET_PROTOCOLS 2 | |
61 | #define IOCNR_SET_PROTOCOL 3 | |
62 | #define IOCNR_HP_SET_CHANNEL 4 | |
63 | #define IOCNR_GET_BUS_ADDRESS 5 | |
64 | #define IOCNR_GET_VID_PID 6 | |
65 | #define IOCNR_SOFT_RESET 7 | |
66 | /* Get device_id string: */ | |
67 | #define LPIOC_GET_DEVICE_ID(len) _IOC(_IOC_READ, 'P', IOCNR_GET_DEVICE_ID, len) | |
298b992f KO |
68 | /* The following ioctls were added for http://hpoj.sourceforge.net: |
69 | * Get two-int array: | |
70 | * [0]=current protocol | |
71 | * (1=USB_CLASS_PRINTER/1/1, 2=USB_CLASS_PRINTER/1/2, | |
72 | * 3=USB_CLASS_PRINTER/1/3), | |
73 | * [1]=supported protocol mask (mask&(1<<n)!=0 means | |
74 | * USB_CLASS_PRINTER/1/n supported): | |
75 | */ | |
1da177e4 | 76 | #define LPIOC_GET_PROTOCOLS(len) _IOC(_IOC_READ, 'P', IOCNR_GET_PROTOCOLS, len) |
298b992f KO |
77 | /* |
78 | * Set protocol | |
79 | * (arg: 1=USB_CLASS_PRINTER/1/1, 2=USB_CLASS_PRINTER/1/2, | |
80 | * 3=USB_CLASS_PRINTER/1/3): | |
81 | */ | |
1da177e4 LT |
82 | #define LPIOC_SET_PROTOCOL _IOC(_IOC_WRITE, 'P', IOCNR_SET_PROTOCOL, 0) |
83 | /* Set channel number (HP Vendor-specific command): */ | |
84 | #define LPIOC_HP_SET_CHANNEL _IOC(_IOC_WRITE, 'P', IOCNR_HP_SET_CHANNEL, 0) | |
85 | /* Get two-int array: [0]=bus number, [1]=device address: */ | |
86 | #define LPIOC_GET_BUS_ADDRESS(len) _IOC(_IOC_READ, 'P', IOCNR_GET_BUS_ADDRESS, len) | |
87 | /* Get two-int array: [0]=vendor ID, [1]=product ID: */ | |
88 | #define LPIOC_GET_VID_PID(len) _IOC(_IOC_READ, 'P', IOCNR_GET_VID_PID, len) | |
89 | /* Perform class specific soft reset */ | |
90 | #define LPIOC_SOFT_RESET _IOC(_IOC_NONE, 'P', IOCNR_SOFT_RESET, 0); | |
91 | ||
92 | /* | |
93 | * A DEVICE_ID string may include the printer's serial number. | |
94 | * It should end with a semi-colon (';'). | |
95 | * An example from an HP 970C DeskJet printer is (this is one long string, | |
96 | * with the serial number changed): | |
97 | 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: ; | |
98 | */ | |
99 | ||
100 | /* | |
101 | * USB Printer Requests | |
102 | */ | |
103 | ||
104 | #define USBLP_REQ_GET_ID 0x00 | |
105 | #define USBLP_REQ_GET_STATUS 0x01 | |
106 | #define USBLP_REQ_RESET 0x02 | |
107 | #define USBLP_REQ_HP_CHANNEL_CHANGE_REQUEST 0x00 /* HP Vendor-specific */ | |
108 | ||
109 | #define USBLP_MINORS 16 | |
110 | #define USBLP_MINOR_BASE 0 | |
111 | ||
283face8 | 112 | #define USBLP_CTL_TIMEOUT 5000 /* 5 seconds */ |
1da177e4 LT |
113 | |
114 | #define USBLP_FIRST_PROTOCOL 1 | |
115 | #define USBLP_LAST_PROTOCOL 3 | |
116 | #define USBLP_MAX_PROTOCOLS (USBLP_LAST_PROTOCOL+1) | |
117 | ||
118 | /* | |
119 | * some arbitrary status buffer size; | |
120 | * need a status buffer that is allocated via kmalloc(), not on stack | |
121 | */ | |
122 | #define STATUS_BUF_SIZE 8 | |
123 | ||
317c67b8 PZ |
124 | /* |
125 | * Locks down the locking order: | |
126 | * ->wmut locks wstatus. | |
127 | * ->mut locks the whole usblp, except [rw]complete, and thus, by indirection, | |
128 | * [rw]status. We only touch status when we know the side idle. | |
129 | * ->lock locks what interrupt accesses. | |
130 | */ | |
1da177e4 | 131 | struct usblp { |
916de027 | 132 | struct usb_device *dev; /* USB device */ |
317c67b8 PZ |
133 | struct mutex wmut; |
134 | struct mutex mut; | |
135 | spinlock_t lock; /* locks rcomplete, wcomplete */ | |
1da177e4 LT |
136 | char *readbuf; /* read transfer_buffer */ |
137 | char *statusbuf; /* status transfer_buffer */ | |
317c67b8 PZ |
138 | struct usb_anchor urbs; |
139 | wait_queue_head_t rwait, wwait; | |
1da177e4 LT |
140 | int readcount; /* Counter for reads */ |
141 | int ifnum; /* Interface number */ | |
142 | struct usb_interface *intf; /* The interface */ | |
298b992f KO |
143 | /* |
144 | * Alternate-setting numbers and endpoints for each protocol | |
145 | * (USB_CLASS_PRINTER/1/{index=1,2,3}) that the device supports: | |
146 | */ | |
1da177e4 LT |
147 | struct { |
148 | int alt_setting; | |
149 | struct usb_endpoint_descriptor *epwrite; | |
150 | struct usb_endpoint_descriptor *epread; | |
151 | } protocol[USBLP_MAX_PROTOCOLS]; | |
152 | int current_protocol; | |
153 | int minor; /* minor number of device */ | |
317c67b8 PZ |
154 | int wcomplete, rcomplete; |
155 | int wstatus; /* bytes written or error */ | |
156 | int rstatus; /* bytes ready or error */ | |
1da177e4 | 157 | unsigned int quirks; /* quirks flags */ |
7f477358 | 158 | unsigned int flags; /* mode flags */ |
1da177e4 LT |
159 | unsigned char used; /* True if open */ |
160 | unsigned char present; /* True if not disconnected */ | |
161 | unsigned char bidir; /* interface is bidirectional */ | |
7f477358 | 162 | unsigned char no_paper; /* Paper Out happened */ |
1da177e4 LT |
163 | unsigned char *device_id_string; /* IEEE 1284 DEVICE ID string (ptr) */ |
164 | /* first 2 bytes are (big-endian) length */ | |
165 | }; | |
166 | ||
167 | #ifdef DEBUG | |
916de027 NK |
168 | static void usblp_dump(struct usblp *usblp) |
169 | { | |
4f306309 | 170 | struct device *dev = &usblp->intf->dev; |
1da177e4 LT |
171 | int p; |
172 | ||
4f306309 GKH |
173 | dev_dbg(dev, "usblp=0x%p\n", usblp); |
174 | dev_dbg(dev, "dev=0x%p\n", usblp->dev); | |
175 | dev_dbg(dev, "present=%d\n", usblp->present); | |
176 | dev_dbg(dev, "readbuf=0x%p\n", usblp->readbuf); | |
177 | dev_dbg(dev, "readcount=%d\n", usblp->readcount); | |
178 | dev_dbg(dev, "ifnum=%d\n", usblp->ifnum); | |
179 | for (p = USBLP_FIRST_PROTOCOL; p <= USBLP_LAST_PROTOCOL; p++) { | |
180 | dev_dbg(dev, "protocol[%d].alt_setting=%d\n", p, | |
181 | usblp->protocol[p].alt_setting); | |
182 | dev_dbg(dev, "protocol[%d].epwrite=%p\n", p, | |
183 | usblp->protocol[p].epwrite); | |
184 | dev_dbg(dev, "protocol[%d].epread=%p\n", p, | |
185 | usblp->protocol[p].epread); | |
186 | } | |
187 | dev_dbg(dev, "current_protocol=%d\n", usblp->current_protocol); | |
188 | dev_dbg(dev, "minor=%d\n", usblp->minor); | |
189 | dev_dbg(dev, "wstatus=%d\n", usblp->wstatus); | |
190 | dev_dbg(dev, "rstatus=%d\n", usblp->rstatus); | |
191 | dev_dbg(dev, "quirks=%d\n", usblp->quirks); | |
192 | dev_dbg(dev, "used=%d\n", usblp->used); | |
193 | dev_dbg(dev, "bidir=%d\n", usblp->bidir); | |
194 | dev_dbg(dev, "device_id_string=\"%s\"\n", | |
1da177e4 LT |
195 | usblp->device_id_string ? |
196 | usblp->device_id_string + 2 : | |
197 | (unsigned char *)"(null)"); | |
198 | } | |
199 | #endif | |
200 | ||
201 | /* Quirks: various printer quirks are handled by this table & its flags. */ | |
202 | ||
203 | struct quirk_printer_struct { | |
204 | __u16 vendorId; | |
205 | __u16 productId; | |
206 | unsigned int quirks; | |
207 | }; | |
208 | ||
209 | #define USBLP_QUIRK_BIDIR 0x1 /* reports bidir but requires unidirectional mode (no INs/reads) */ | |
210 | #define USBLP_QUIRK_USB_INIT 0x2 /* needs vendor USB init string */ | |
5ec71db5 | 211 | #define USBLP_QUIRK_BAD_CLASS 0x4 /* descriptor uses vendor-specific Class or SubClass */ |
1da177e4 | 212 | |
4c4c9432 | 213 | static const struct quirk_printer_struct quirk_printers[] = { |
1da177e4 LT |
214 | { 0x03f0, 0x0004, USBLP_QUIRK_BIDIR }, /* HP DeskJet 895C */ |
215 | { 0x03f0, 0x0104, USBLP_QUIRK_BIDIR }, /* HP DeskJet 880C */ | |
216 | { 0x03f0, 0x0204, USBLP_QUIRK_BIDIR }, /* HP DeskJet 815C */ | |
217 | { 0x03f0, 0x0304, USBLP_QUIRK_BIDIR }, /* HP DeskJet 810C/812C */ | |
218 | { 0x03f0, 0x0404, USBLP_QUIRK_BIDIR }, /* HP DeskJet 830C */ | |
219 | { 0x03f0, 0x0504, USBLP_QUIRK_BIDIR }, /* HP DeskJet 885C */ | |
916de027 NK |
220 | { 0x03f0, 0x0604, USBLP_QUIRK_BIDIR }, /* HP DeskJet 840C */ |
221 | { 0x03f0, 0x0804, USBLP_QUIRK_BIDIR }, /* HP DeskJet 816C */ | |
1da177e4 LT |
222 | { 0x03f0, 0x1104, USBLP_QUIRK_BIDIR }, /* HP Deskjet 959C */ |
223 | { 0x0409, 0xefbe, USBLP_QUIRK_BIDIR }, /* NEC Picty900 (HP OEM) */ | |
224 | { 0x0409, 0xbef4, USBLP_QUIRK_BIDIR }, /* NEC Picty760 (HP OEM) */ | |
225 | { 0x0409, 0xf0be, USBLP_QUIRK_BIDIR }, /* NEC Picty920 (HP OEM) */ | |
226 | { 0x0409, 0xf1be, USBLP_QUIRK_BIDIR }, /* NEC Picty800 (HP OEM) */ | |
4f45d038 | 227 | { 0x0482, 0x0010, USBLP_QUIRK_BIDIR }, /* Kyocera Mita FS 820, by zut <kernel@zut.de> */ |
06a743bf | 228 | { 0x04f9, 0x000d, USBLP_QUIRK_BIDIR }, /* Brother Industries, Ltd HL-1440 Laser Printer */ |
5ec71db5 | 229 | { 0x04b8, 0x0202, USBLP_QUIRK_BAD_CLASS }, /* Seiko Epson Receipt Printer M129C */ |
1da177e4 LT |
230 | { 0, 0 } |
231 | }; | |
232 | ||
317c67b8 PZ |
233 | static int usblp_wwait(struct usblp *usblp, int nonblock); |
234 | static int usblp_wtest(struct usblp *usblp, int nonblock); | |
235 | static int usblp_rwait_and_lock(struct usblp *usblp, int nonblock); | |
236 | static int usblp_rtest(struct usblp *usblp, int nonblock); | |
237 | static int usblp_submit_read(struct usblp *usblp); | |
1da177e4 LT |
238 | static int usblp_select_alts(struct usblp *usblp); |
239 | static int usblp_set_protocol(struct usblp *usblp, int protocol); | |
240 | static int usblp_cache_device_id_string(struct usblp *usblp); | |
241 | ||
242 | /* forward reference to make our lives easier */ | |
243 | static struct usb_driver usblp_driver; | |
4186ecf8 | 244 | static DEFINE_MUTEX(usblp_mutex); /* locks the existence of usblp's */ |
1da177e4 LT |
245 | |
246 | /* | |
247 | * Functions for usblp control messages. | |
248 | */ | |
249 | ||
250 | static int usblp_ctrl_msg(struct usblp *usblp, int request, int type, int dir, int recip, int value, void *buf, int len) | |
251 | { | |
252 | int retval; | |
253 | int index = usblp->ifnum; | |
254 | ||
255 | /* High byte has the interface index. | |
256 | Low byte has the alternate setting. | |
257 | */ | |
916de027 NK |
258 | if ((request == USBLP_REQ_GET_ID) && (type == USB_TYPE_CLASS)) |
259 | index = (usblp->ifnum<<8)|usblp->protocol[usblp->current_protocol].alt_setting; | |
1da177e4 LT |
260 | |
261 | retval = usb_control_msg(usblp->dev, | |
262 | dir ? usb_rcvctrlpipe(usblp->dev, 0) : usb_sndctrlpipe(usblp->dev, 0), | |
283face8 | 263 | request, type | dir | recip, value, index, buf, len, USBLP_CTL_TIMEOUT); |
4f306309 GKH |
264 | dev_dbg(&usblp->intf->dev, |
265 | "usblp_control_msg: rq: 0x%02x dir: %d recip: %d value: %d idx: %d len: %#x result: %d\n", | |
1da177e4 LT |
266 | request, !!dir, recip, value, index, len, retval); |
267 | return retval < 0 ? retval : 0; | |
268 | } | |
269 | ||
270 | #define usblp_read_status(usblp, status)\ | |
271 | usblp_ctrl_msg(usblp, USBLP_REQ_GET_STATUS, USB_TYPE_CLASS, USB_DIR_IN, USB_RECIP_INTERFACE, 0, status, 1) | |
272 | #define usblp_get_id(usblp, config, id, maxlen)\ | |
273 | usblp_ctrl_msg(usblp, USBLP_REQ_GET_ID, USB_TYPE_CLASS, USB_DIR_IN, USB_RECIP_INTERFACE, config, id, maxlen) | |
274 | #define usblp_reset(usblp)\ | |
275 | usblp_ctrl_msg(usblp, USBLP_REQ_RESET, USB_TYPE_CLASS, USB_DIR_OUT, USB_RECIP_OTHER, 0, NULL, 0) | |
276 | ||
277 | #define usblp_hp_channel_change_request(usblp, channel, buffer) \ | |
278 | usblp_ctrl_msg(usblp, USBLP_REQ_HP_CHANNEL_CHANGE_REQUEST, USB_TYPE_VENDOR, USB_DIR_IN, USB_RECIP_INTERFACE, channel, buffer, 1) | |
279 | ||
280 | /* | |
281 | * See the description for usblp_select_alts() below for the usage | |
21470e32 | 282 | * explanation. Look into your /sys/kernel/debug/usb/devices and dmesg in |
1da177e4 LT |
283 | * case of any trouble. |
284 | */ | |
285 | static int proto_bias = -1; | |
286 | ||
287 | /* | |
288 | * URB callback. | |
289 | */ | |
290 | ||
7d12e780 | 291 | static void usblp_bulk_read(struct urb *urb) |
1da177e4 LT |
292 | { |
293 | struct usblp *usblp = urb->context; | |
18ac3016 | 294 | int status = urb->status; |
1da177e4 | 295 | |
317c67b8 | 296 | if (usblp->present && usblp->used) { |
18ac3016 | 297 | if (status) |
317c67b8 PZ |
298 | printk(KERN_WARNING "usblp%d: " |
299 | "nonzero read bulk status received: %d\n", | |
18ac3016 | 300 | usblp->minor, status); |
317c67b8 PZ |
301 | } |
302 | spin_lock(&usblp->lock); | |
18ac3016 GKH |
303 | if (status < 0) |
304 | usblp->rstatus = status; | |
317c67b8 PZ |
305 | else |
306 | usblp->rstatus = urb->actual_length; | |
1da177e4 | 307 | usblp->rcomplete = 1; |
317c67b8 PZ |
308 | wake_up(&usblp->rwait); |
309 | spin_unlock(&usblp->lock); | |
310 | ||
311 | usb_free_urb(urb); | |
1da177e4 LT |
312 | } |
313 | ||
7d12e780 | 314 | static void usblp_bulk_write(struct urb *urb) |
1da177e4 LT |
315 | { |
316 | struct usblp *usblp = urb->context; | |
18ac3016 | 317 | int status = urb->status; |
1da177e4 | 318 | |
317c67b8 | 319 | if (usblp->present && usblp->used) { |
18ac3016 | 320 | if (status) |
317c67b8 PZ |
321 | printk(KERN_WARNING "usblp%d: " |
322 | "nonzero write bulk status received: %d\n", | |
18ac3016 | 323 | usblp->minor, status); |
317c67b8 PZ |
324 | } |
325 | spin_lock(&usblp->lock); | |
18ac3016 GKH |
326 | if (status < 0) |
327 | usblp->wstatus = status; | |
317c67b8 PZ |
328 | else |
329 | usblp->wstatus = urb->actual_length; | |
7f477358 | 330 | usblp->no_paper = 0; |
1da177e4 | 331 | usblp->wcomplete = 1; |
317c67b8 PZ |
332 | wake_up(&usblp->wwait); |
333 | spin_unlock(&usblp->lock); | |
334 | ||
317c67b8 | 335 | usb_free_urb(urb); |
1da177e4 LT |
336 | } |
337 | ||
338 | /* | |
339 | * Get and print printer errors. | |
340 | */ | |
341 | ||
4c4c9432 | 342 | static const char *usblp_messages[] = { "ok", "out of paper", "off-line", "on fire" }; |
1da177e4 LT |
343 | |
344 | static int usblp_check_status(struct usblp *usblp, int err) | |
345 | { | |
346 | unsigned char status, newerr = 0; | |
347 | int error; | |
348 | ||
fc401e69 PZ |
349 | mutex_lock(&usblp->mut); |
350 | if ((error = usblp_read_status(usblp, usblp->statusbuf)) < 0) { | |
351 | mutex_unlock(&usblp->mut); | |
305e7be5 | 352 | printk_ratelimited(KERN_ERR |
317c67b8 | 353 | "usblp%d: error %d reading printer status\n", |
0bc8e009 | 354 | usblp->minor, error); |
1da177e4 LT |
355 | return 0; |
356 | } | |
1da177e4 | 357 | status = *usblp->statusbuf; |
fc401e69 | 358 | mutex_unlock(&usblp->mut); |
1da177e4 LT |
359 | |
360 | if (~status & LP_PERRORP) | |
361 | newerr = 3; | |
362 | if (status & LP_POUTPA) | |
363 | newerr = 1; | |
364 | if (~status & LP_PSELECD) | |
365 | newerr = 2; | |
366 | ||
317c67b8 PZ |
367 | if (newerr != err) { |
368 | printk(KERN_INFO "usblp%d: %s\n", | |
369 | usblp->minor, usblp_messages[newerr]); | |
370 | } | |
1da177e4 LT |
371 | |
372 | return newerr; | |
373 | } | |
374 | ||
916de027 | 375 | static int handle_bidir(struct usblp *usblp) |
516077c1 | 376 | { |
3a90f818 | 377 | if (usblp->bidir && usblp->used) { |
317c67b8 | 378 | if (usblp_submit_read(usblp) < 0) |
516077c1 | 379 | return -EIO; |
516077c1 | 380 | } |
516077c1 ON |
381 | return 0; |
382 | } | |
383 | ||
1da177e4 LT |
384 | /* |
385 | * File op functions. | |
386 | */ | |
387 | ||
388 | static int usblp_open(struct inode *inode, struct file *file) | |
389 | { | |
390 | int minor = iminor(inode); | |
391 | struct usblp *usblp; | |
392 | struct usb_interface *intf; | |
393 | int retval; | |
394 | ||
395 | if (minor < 0) | |
396 | return -ENODEV; | |
397 | ||
916de027 | 398 | mutex_lock(&usblp_mutex); |
1da177e4 LT |
399 | |
400 | retval = -ENODEV; | |
401 | intf = usb_find_interface(&usblp_driver, minor); | |
916de027 | 402 | if (!intf) |
1da177e4 | 403 | goto out; |
916de027 | 404 | usblp = usb_get_intfdata(intf); |
1da177e4 LT |
405 | if (!usblp || !usblp->dev || !usblp->present) |
406 | goto out; | |
407 | ||
408 | retval = -EBUSY; | |
409 | if (usblp->used) | |
410 | goto out; | |
411 | ||
412 | /* | |
7f477358 PZ |
413 | * We do not implement LP_ABORTOPEN/LPABORTOPEN for two reasons: |
414 | * - We do not want persistent state which close(2) does not clear | |
415 | * - It is not used anyway, according to CUPS people | |
1da177e4 | 416 | */ |
1da177e4 | 417 | |
d0532184 ON |
418 | retval = usb_autopm_get_interface(intf); |
419 | if (retval < 0) | |
420 | goto out; | |
1da177e4 LT |
421 | usblp->used = 1; |
422 | file->private_data = usblp; | |
423 | ||
1da177e4 | 424 | usblp->wcomplete = 1; /* we begin writeable */ |
317c67b8 | 425 | usblp->wstatus = 0; |
1da177e4 LT |
426 | usblp->rcomplete = 0; |
427 | ||
516077c1 | 428 | if (handle_bidir(usblp) < 0) { |
19028690 | 429 | usb_autopm_put_interface(intf); |
97cb95d1 | 430 | usblp->used = 0; |
516077c1 ON |
431 | file->private_data = NULL; |
432 | retval = -EIO; | |
1da177e4 LT |
433 | } |
434 | out: | |
916de027 | 435 | mutex_unlock(&usblp_mutex); |
1da177e4 LT |
436 | return retval; |
437 | } | |
438 | ||
916de027 | 439 | static void usblp_cleanup(struct usblp *usblp) |
1da177e4 | 440 | { |
317c67b8 | 441 | printk(KERN_INFO "usblp%d: removed\n", usblp->minor); |
1da177e4 | 442 | |
317c67b8 | 443 | kfree(usblp->readbuf); |
916de027 NK |
444 | kfree(usblp->device_id_string); |
445 | kfree(usblp->statusbuf); | |
446 | kfree(usblp); | |
1da177e4 LT |
447 | } |
448 | ||
449 | static void usblp_unlink_urbs(struct usblp *usblp) | |
450 | { | |
317c67b8 | 451 | usb_kill_anchored_urbs(&usblp->urbs); |
1da177e4 LT |
452 | } |
453 | ||
454 | static int usblp_release(struct inode *inode, struct file *file) | |
455 | { | |
456 | struct usblp *usblp = file->private_data; | |
457 | ||
7f477358 PZ |
458 | usblp->flags &= ~LP_ABORT; |
459 | ||
916de027 | 460 | mutex_lock(&usblp_mutex); |
1da177e4 | 461 | usblp->used = 0; |
da052e09 | 462 | if (usblp->present) |
1da177e4 | 463 | usblp_unlink_urbs(usblp); |
da052e09 JH |
464 | |
465 | usb_autopm_put_interface(usblp->intf); | |
466 | ||
467 | if (!usblp->present) /* finish cleanup from disconnect */ | |
916de027 NK |
468 | usblp_cleanup(usblp); |
469 | mutex_unlock(&usblp_mutex); | |
1da177e4 LT |
470 | return 0; |
471 | } | |
472 | ||
473 | /* No kernel lock - fine */ | |
474 | static unsigned int usblp_poll(struct file *file, struct poll_table_struct *wait) | |
475 | { | |
317c67b8 PZ |
476 | int ret; |
477 | unsigned long flags; | |
478 | ||
1da177e4 | 479 | struct usblp *usblp = file->private_data; |
317c67b8 PZ |
480 | /* Should we check file->f_mode & FMODE_WRITE before poll_wait()? */ |
481 | poll_wait(file, &usblp->rwait, wait); | |
482 | poll_wait(file, &usblp->wwait, wait); | |
483 | spin_lock_irqsave(&usblp->lock, flags); | |
283face8 PZ |
484 | ret = ((usblp->bidir && usblp->rcomplete) ? POLLIN | POLLRDNORM : 0) | |
485 | ((usblp->no_paper || usblp->wcomplete) ? POLLOUT | POLLWRNORM : 0); | |
317c67b8 PZ |
486 | spin_unlock_irqrestore(&usblp->lock, flags); |
487 | return ret; | |
1da177e4 LT |
488 | } |
489 | ||
318e479e | 490 | static long usblp_ioctl(struct file *file, unsigned int cmd, unsigned long arg) |
1da177e4 LT |
491 | { |
492 | struct usblp *usblp = file->private_data; | |
493 | int length, err, i; | |
494 | unsigned char newChannel; | |
495 | int status; | |
496 | int twoints[2]; | |
497 | int retval = 0; | |
498 | ||
916de027 | 499 | mutex_lock(&usblp->mut); |
1da177e4 LT |
500 | if (!usblp->present) { |
501 | retval = -ENODEV; | |
502 | goto done; | |
503 | } | |
504 | ||
4f306309 GKH |
505 | dev_dbg(&usblp->intf->dev, |
506 | "usblp_ioctl: cmd=0x%x (%c nr=%d len=%d dir=%d)\n", cmd, | |
507 | _IOC_TYPE(cmd), _IOC_NR(cmd), _IOC_SIZE(cmd), _IOC_DIR(cmd)); | |
1da177e4 LT |
508 | |
509 | if (_IOC_TYPE(cmd) == 'P') /* new-style ioctl number */ | |
510 | ||
511 | switch (_IOC_NR(cmd)) { | |
512 | ||
916de027 NK |
513 | case IOCNR_GET_DEVICE_ID: /* get the DEVICE_ID string */ |
514 | if (_IOC_DIR(cmd) != _IOC_READ) { | |
515 | retval = -EINVAL; | |
516 | goto done; | |
517 | } | |
1da177e4 | 518 | |
916de027 NK |
519 | length = usblp_cache_device_id_string(usblp); |
520 | if (length < 0) { | |
521 | retval = length; | |
522 | goto done; | |
523 | } | |
524 | if (length > _IOC_SIZE(cmd)) | |
525 | length = _IOC_SIZE(cmd); /* truncate */ | |
526 | ||
527 | if (copy_to_user((void __user *) arg, | |
528 | usblp->device_id_string, | |
529 | (unsigned long) length)) { | |
530 | retval = -EFAULT; | |
531 | goto done; | |
532 | } | |
1da177e4 | 533 | |
916de027 | 534 | break; |
1da177e4 | 535 | |
916de027 NK |
536 | case IOCNR_GET_PROTOCOLS: |
537 | if (_IOC_DIR(cmd) != _IOC_READ || | |
538 | _IOC_SIZE(cmd) < sizeof(twoints)) { | |
539 | retval = -EINVAL; | |
540 | goto done; | |
541 | } | |
1da177e4 | 542 | |
916de027 NK |
543 | twoints[0] = usblp->current_protocol; |
544 | twoints[1] = 0; | |
545 | for (i = USBLP_FIRST_PROTOCOL; | |
546 | i <= USBLP_LAST_PROTOCOL; i++) { | |
547 | if (usblp->protocol[i].alt_setting >= 0) | |
548 | twoints[1] |= (1<<i); | |
549 | } | |
1da177e4 | 550 | |
916de027 NK |
551 | if (copy_to_user((void __user *)arg, |
552 | (unsigned char *)twoints, | |
553 | sizeof(twoints))) { | |
554 | retval = -EFAULT; | |
555 | goto done; | |
556 | } | |
1da177e4 | 557 | |
916de027 | 558 | break; |
1da177e4 | 559 | |
916de027 NK |
560 | case IOCNR_SET_PROTOCOL: |
561 | if (_IOC_DIR(cmd) != _IOC_WRITE) { | |
562 | retval = -EINVAL; | |
563 | goto done; | |
564 | } | |
1da177e4 LT |
565 | |
566 | #ifdef DEBUG | |
916de027 NK |
567 | if (arg == -10) { |
568 | usblp_dump(usblp); | |
569 | break; | |
570 | } | |
1da177e4 LT |
571 | #endif |
572 | ||
916de027 NK |
573 | usblp_unlink_urbs(usblp); |
574 | retval = usblp_set_protocol(usblp, arg); | |
575 | if (retval < 0) { | |
576 | usblp_set_protocol(usblp, | |
577 | usblp->current_protocol); | |
578 | } | |
579 | break; | |
1da177e4 | 580 | |
916de027 NK |
581 | case IOCNR_HP_SET_CHANNEL: |
582 | if (_IOC_DIR(cmd) != _IOC_WRITE || | |
583 | le16_to_cpu(usblp->dev->descriptor.idVendor) != 0x03F0 || | |
584 | usblp->quirks & USBLP_QUIRK_BIDIR) { | |
585 | retval = -EINVAL; | |
586 | goto done; | |
587 | } | |
1da177e4 | 588 | |
916de027 NK |
589 | err = usblp_hp_channel_change_request(usblp, |
590 | arg, &newChannel); | |
591 | if (err < 0) { | |
592 | dev_err(&usblp->dev->dev, | |
593 | "usblp%d: error = %d setting " | |
594 | "HP channel\n", | |
595 | usblp->minor, err); | |
596 | retval = -EIO; | |
597 | goto done; | |
598 | } | |
1da177e4 | 599 | |
4f306309 GKH |
600 | dev_dbg(&usblp->intf->dev, |
601 | "usblp%d requested/got HP channel %ld/%d\n", | |
916de027 NK |
602 | usblp->minor, arg, newChannel); |
603 | break; | |
1da177e4 | 604 | |
916de027 NK |
605 | case IOCNR_GET_BUS_ADDRESS: |
606 | if (_IOC_DIR(cmd) != _IOC_READ || | |
607 | _IOC_SIZE(cmd) < sizeof(twoints)) { | |
608 | retval = -EINVAL; | |
609 | goto done; | |
610 | } | |
1da177e4 | 611 | |
916de027 NK |
612 | twoints[0] = usblp->dev->bus->busnum; |
613 | twoints[1] = usblp->dev->devnum; | |
614 | if (copy_to_user((void __user *)arg, | |
615 | (unsigned char *)twoints, | |
616 | sizeof(twoints))) { | |
617 | retval = -EFAULT; | |
618 | goto done; | |
619 | } | |
1da177e4 | 620 | |
4f306309 GKH |
621 | dev_dbg(&usblp->intf->dev, |
622 | "usblp%d is bus=%d, device=%d\n", | |
916de027 NK |
623 | usblp->minor, twoints[0], twoints[1]); |
624 | break; | |
1da177e4 | 625 | |
916de027 NK |
626 | case IOCNR_GET_VID_PID: |
627 | if (_IOC_DIR(cmd) != _IOC_READ || | |
628 | _IOC_SIZE(cmd) < sizeof(twoints)) { | |
629 | retval = -EINVAL; | |
630 | goto done; | |
631 | } | |
1da177e4 | 632 | |
916de027 NK |
633 | twoints[0] = le16_to_cpu(usblp->dev->descriptor.idVendor); |
634 | twoints[1] = le16_to_cpu(usblp->dev->descriptor.idProduct); | |
635 | if (copy_to_user((void __user *)arg, | |
636 | (unsigned char *)twoints, | |
637 | sizeof(twoints))) { | |
638 | retval = -EFAULT; | |
639 | goto done; | |
640 | } | |
1da177e4 | 641 | |
4f306309 GKH |
642 | dev_dbg(&usblp->intf->dev, |
643 | "usblp%d is VID=0x%4.4X, PID=0x%4.4X\n", | |
916de027 NK |
644 | usblp->minor, twoints[0], twoints[1]); |
645 | break; | |
1da177e4 | 646 | |
916de027 NK |
647 | case IOCNR_SOFT_RESET: |
648 | if (_IOC_DIR(cmd) != _IOC_NONE) { | |
649 | retval = -EINVAL; | |
650 | goto done; | |
651 | } | |
652 | retval = usblp_reset(usblp); | |
653 | break; | |
654 | default: | |
655 | retval = -ENOTTY; | |
1da177e4 LT |
656 | } |
657 | else /* old-style ioctl value */ | |
658 | switch (cmd) { | |
659 | ||
916de027 | 660 | case LPGETSTATUS: |
2fcdbdfd GKH |
661 | retval = usblp_read_status(usblp, usblp->statusbuf); |
662 | if (retval) { | |
305e7be5 | 663 | printk_ratelimited(KERN_ERR "usblp%d:" |
916de027 NK |
664 | "failed reading printer status (%d)\n", |
665 | usblp->minor, retval); | |
666 | retval = -EIO; | |
667 | goto done; | |
668 | } | |
669 | status = *usblp->statusbuf; | |
670 | if (copy_to_user((void __user *)arg, &status, sizeof(int))) | |
671 | retval = -EFAULT; | |
672 | break; | |
1da177e4 | 673 | |
916de027 NK |
674 | case LPABORT: |
675 | if (arg) | |
676 | usblp->flags |= LP_ABORT; | |
677 | else | |
678 | usblp->flags &= ~LP_ABORT; | |
679 | break; | |
7f477358 | 680 | |
916de027 NK |
681 | default: |
682 | retval = -ENOTTY; | |
1da177e4 LT |
683 | } |
684 | ||
685 | done: | |
916de027 | 686 | mutex_unlock(&usblp->mut); |
1da177e4 LT |
687 | return retval; |
688 | } | |
689 | ||
42cb967f PZ |
690 | static struct urb *usblp_new_writeurb(struct usblp *usblp, int transfer_length) |
691 | { | |
692 | struct urb *urb; | |
693 | char *writebuf; | |
694 | ||
2fcdbdfd GKH |
695 | writebuf = kmalloc(transfer_length, GFP_KERNEL); |
696 | if (writebuf == NULL) | |
42cb967f | 697 | return NULL; |
2fcdbdfd GKH |
698 | urb = usb_alloc_urb(0, GFP_KERNEL); |
699 | if (urb == NULL) { | |
42cb967f PZ |
700 | kfree(writebuf); |
701 | return NULL; | |
702 | } | |
703 | ||
704 | usb_fill_bulk_urb(urb, usblp->dev, | |
705 | usb_sndbulkpipe(usblp->dev, | |
706 | usblp->protocol[usblp->current_protocol].epwrite->bEndpointAddress), | |
707 | writebuf, transfer_length, usblp_bulk_write, usblp); | |
708 | urb->transfer_flags |= URB_FREE_BUFFER; | |
709 | ||
710 | return urb; | |
711 | } | |
712 | ||
1da177e4 LT |
713 | static ssize_t usblp_write(struct file *file, const char __user *buffer, size_t count, loff_t *ppos) |
714 | { | |
1da177e4 | 715 | struct usblp *usblp = file->private_data; |
317c67b8 PZ |
716 | struct urb *writeurb; |
717 | int rv; | |
718 | int transfer_length; | |
719 | ssize_t writecount = 0; | |
720 | ||
721 | if (mutex_lock_interruptible(&usblp->wmut)) { | |
722 | rv = -EINTR; | |
723 | goto raise_biglock; | |
724 | } | |
725 | if ((rv = usblp_wwait(usblp, !!(file->f_flags & O_NONBLOCK))) < 0) | |
726 | goto raise_wait; | |
1da177e4 LT |
727 | |
728 | while (writecount < count) { | |
317c67b8 PZ |
729 | /* |
730 | * Step 1: Submit next block. | |
1da177e4 | 731 | */ |
317c67b8 | 732 | if ((transfer_length = count - writecount) > USBLP_BUF_SIZE) |
1da177e4 LT |
733 | transfer_length = USBLP_BUF_SIZE; |
734 | ||
317c67b8 | 735 | rv = -ENOMEM; |
2fcdbdfd GKH |
736 | writeurb = usblp_new_writeurb(usblp, transfer_length); |
737 | if (writeurb == NULL) | |
317c67b8 | 738 | goto raise_urb; |
317c67b8 PZ |
739 | usb_anchor_urb(writeurb, &usblp->urbs); |
740 | ||
42cb967f | 741 | if (copy_from_user(writeurb->transfer_buffer, |
1da177e4 | 742 | buffer + writecount, transfer_length)) { |
317c67b8 PZ |
743 | rv = -EFAULT; |
744 | goto raise_badaddr; | |
1da177e4 LT |
745 | } |
746 | ||
317c67b8 | 747 | spin_lock_irq(&usblp->lock); |
1da177e4 | 748 | usblp->wcomplete = 0; |
317c67b8 PZ |
749 | spin_unlock_irq(&usblp->lock); |
750 | if ((rv = usb_submit_urb(writeurb, GFP_KERNEL)) < 0) { | |
751 | usblp->wstatus = 0; | |
752 | spin_lock_irq(&usblp->lock); | |
7f477358 | 753 | usblp->no_paper = 0; |
6c8df79f | 754 | usblp->wcomplete = 1; |
317c67b8 PZ |
755 | wake_up(&usblp->wwait); |
756 | spin_unlock_irq(&usblp->lock); | |
757 | if (rv != -ENOMEM) | |
758 | rv = -EIO; | |
759 | goto raise_submit; | |
760 | } | |
761 | ||
762 | /* | |
763 | * Step 2: Wait for transfer to end, collect results. | |
764 | */ | |
765 | rv = usblp_wwait(usblp, !!(file->f_flags&O_NONBLOCK)); | |
766 | if (rv < 0) { | |
10e48522 PZ |
767 | if (rv == -EAGAIN) { |
768 | /* Presume that it's going to complete well. */ | |
769 | writecount += transfer_length; | |
770 | } | |
7f477358 PZ |
771 | if (rv == -ENOSPC) { |
772 | spin_lock_irq(&usblp->lock); | |
773 | usblp->no_paper = 1; /* Mark for poll(2) */ | |
774 | spin_unlock_irq(&usblp->lock); | |
775 | writecount += transfer_length; | |
776 | } | |
10e48522 | 777 | /* Leave URB dangling, to be cleaned on close. */ |
317c67b8 | 778 | goto collect_error; |
1da177e4 | 779 | } |
317c67b8 PZ |
780 | |
781 | if (usblp->wstatus < 0) { | |
317c67b8 PZ |
782 | rv = -EIO; |
783 | goto collect_error; | |
784 | } | |
785 | /* | |
786 | * This is critical: it must be our URB, not other writer's. | |
787 | * The wmut exists mainly to cover us here. | |
788 | */ | |
789 | writecount += usblp->wstatus; | |
1da177e4 LT |
790 | } |
791 | ||
317c67b8 PZ |
792 | mutex_unlock(&usblp->wmut); |
793 | return writecount; | |
794 | ||
795 | raise_submit: | |
796 | raise_badaddr: | |
797 | usb_unanchor_urb(writeurb); | |
798 | usb_free_urb(writeurb); | |
799 | raise_urb: | |
317c67b8 PZ |
800 | raise_wait: |
801 | collect_error: /* Out of raise sequence */ | |
802 | mutex_unlock(&usblp->wmut); | |
803 | raise_biglock: | |
804 | return writecount ? writecount : rv; | |
1da177e4 LT |
805 | } |
806 | ||
317c67b8 PZ |
807 | /* |
808 | * Notice that we fail to restart in a few cases: on EFAULT, on restart | |
809 | * error, etc. This is the historical behaviour. In all such cases we return | |
810 | * EIO, and applications loop in order to get the new read going. | |
811 | */ | |
812 | static ssize_t usblp_read(struct file *file, char __user *buffer, size_t len, loff_t *ppos) | |
1da177e4 LT |
813 | { |
814 | struct usblp *usblp = file->private_data; | |
317c67b8 PZ |
815 | ssize_t count; |
816 | ssize_t avail; | |
817 | int rv; | |
1da177e4 LT |
818 | |
819 | if (!usblp->bidir) | |
820 | return -EINVAL; | |
821 | ||
317c67b8 PZ |
822 | rv = usblp_rwait_and_lock(usblp, !!(file->f_flags & O_NONBLOCK)); |
823 | if (rv < 0) | |
824 | return rv; | |
825 | ||
826 | if ((avail = usblp->rstatus) < 0) { | |
827 | printk(KERN_ERR "usblp%d: error %d reading from printer\n", | |
828 | usblp->minor, (int)avail); | |
829 | usblp_submit_read(usblp); | |
830 | count = -EIO; | |
1da177e4 LT |
831 | goto done; |
832 | } | |
833 | ||
317c67b8 PZ |
834 | count = len < avail - usblp->readcount ? len : avail - usblp->readcount; |
835 | if (count != 0 && | |
836 | copy_to_user(buffer, usblp->readbuf + usblp->readcount, count)) { | |
837 | count = -EFAULT; | |
838 | goto done; | |
839 | } | |
1da177e4 | 840 | |
317c67b8 PZ |
841 | if ((usblp->readcount += count) == avail) { |
842 | if (usblp_submit_read(usblp) < 0) { | |
843 | /* We don't want to leak USB return codes into errno. */ | |
844 | if (count == 0) | |
845 | count = -EIO; | |
8e695cdb | 846 | goto done; |
1da177e4 | 847 | } |
1da177e4 LT |
848 | } |
849 | ||
317c67b8 | 850 | done: |
916de027 | 851 | mutex_unlock(&usblp->mut); |
317c67b8 PZ |
852 | return count; |
853 | } | |
854 | ||
855 | /* | |
856 | * Wait for the write path to come idle. | |
857 | * This is called under the ->wmut, so the idle path stays idle. | |
858 | * | |
859 | * Our write path has a peculiar property: it does not buffer like a tty, | |
860 | * but waits for the write to succeed. This allows our ->release to bug out | |
861 | * without waiting for writes to drain. But it obviously does not work | |
862 | * when O_NONBLOCK is set. So, applications setting O_NONBLOCK must use | |
863 | * select(2) or poll(2) to wait for the buffer to drain before closing. | |
864 | * Alternatively, set blocking mode with fcntl and issue a zero-size write. | |
317c67b8 PZ |
865 | */ |
866 | static int usblp_wwait(struct usblp *usblp, int nonblock) | |
867 | { | |
868 | DECLARE_WAITQUEUE(waita, current); | |
869 | int rc; | |
7f477358 | 870 | int err = 0; |
317c67b8 PZ |
871 | |
872 | add_wait_queue(&usblp->wwait, &waita); | |
873 | for (;;) { | |
874 | if (mutex_lock_interruptible(&usblp->mut)) { | |
875 | rc = -EINTR; | |
876 | break; | |
877 | } | |
19cd80a2 | 878 | set_current_state(TASK_INTERRUPTIBLE); |
7f477358 | 879 | rc = usblp_wtest(usblp, nonblock); |
317c67b8 | 880 | mutex_unlock(&usblp->mut); |
7f477358 | 881 | if (rc <= 0) |
317c67b8 | 882 | break; |
7f477358 | 883 | |
dd44be6b PZ |
884 | if (schedule_timeout(msecs_to_jiffies(1500)) == 0) { |
885 | if (usblp->flags & LP_ABORT) { | |
7f477358 PZ |
886 | err = usblp_check_status(usblp, err); |
887 | if (err == 1) { /* Paper out */ | |
888 | rc = -ENOSPC; | |
889 | break; | |
890 | } | |
dd44be6b PZ |
891 | } else { |
892 | /* Prod the printer, Gentoo#251237. */ | |
893 | mutex_lock(&usblp->mut); | |
894 | usblp_read_status(usblp, usblp->statusbuf); | |
895 | mutex_unlock(&usblp->mut); | |
7f477358 | 896 | } |
7f477358 | 897 | } |
1da177e4 | 898 | } |
317c67b8 PZ |
899 | set_current_state(TASK_RUNNING); |
900 | remove_wait_queue(&usblp->wwait, &waita); | |
901 | return rc; | |
902 | } | |
1da177e4 | 903 | |
317c67b8 PZ |
904 | static int usblp_wtest(struct usblp *usblp, int nonblock) |
905 | { | |
906 | unsigned long flags; | |
907 | ||
908 | if (!usblp->present) | |
909 | return -ENODEV; | |
910 | if (signal_pending(current)) | |
911 | return -EINTR; | |
912 | spin_lock_irqsave(&usblp->lock, flags); | |
913 | if (usblp->wcomplete) { | |
914 | spin_unlock_irqrestore(&usblp->lock, flags); | |
915 | return 0; | |
516077c1 | 916 | } |
317c67b8 | 917 | spin_unlock_irqrestore(&usblp->lock, flags); |
317c67b8 PZ |
918 | if (nonblock) |
919 | return -EAGAIN; | |
920 | return 1; | |
921 | } | |
516077c1 | 922 | |
317c67b8 PZ |
923 | /* |
924 | * Wait for read bytes to become available. This probably should have been | |
925 | * called usblp_r_lock_and_wait(), because we lock first. But it's a traditional | |
926 | * name for functions which lock and return. | |
927 | * | |
928 | * We do not use wait_event_interruptible because it makes locking iffy. | |
929 | */ | |
930 | static int usblp_rwait_and_lock(struct usblp *usblp, int nonblock) | |
931 | { | |
932 | DECLARE_WAITQUEUE(waita, current); | |
933 | int rc; | |
934 | ||
935 | add_wait_queue(&usblp->rwait, &waita); | |
936 | for (;;) { | |
937 | if (mutex_lock_interruptible(&usblp->mut)) { | |
938 | rc = -EINTR; | |
939 | break; | |
940 | } | |
941 | set_current_state(TASK_INTERRUPTIBLE); | |
942 | if ((rc = usblp_rtest(usblp, nonblock)) < 0) { | |
943 | mutex_unlock(&usblp->mut); | |
944 | break; | |
945 | } | |
946 | if (rc == 0) /* Keep it locked */ | |
947 | break; | |
948 | mutex_unlock(&usblp->mut); | |
949 | schedule(); | |
1da177e4 | 950 | } |
317c67b8 PZ |
951 | set_current_state(TASK_RUNNING); |
952 | remove_wait_queue(&usblp->rwait, &waita); | |
953 | return rc; | |
954 | } | |
1da177e4 | 955 | |
317c67b8 PZ |
956 | static int usblp_rtest(struct usblp *usblp, int nonblock) |
957 | { | |
958 | unsigned long flags; | |
1da177e4 | 959 | |
317c67b8 PZ |
960 | if (!usblp->present) |
961 | return -ENODEV; | |
962 | if (signal_pending(current)) | |
963 | return -EINTR; | |
964 | spin_lock_irqsave(&usblp->lock, flags); | |
965 | if (usblp->rcomplete) { | |
966 | spin_unlock_irqrestore(&usblp->lock, flags); | |
967 | return 0; | |
1da177e4 | 968 | } |
317c67b8 | 969 | spin_unlock_irqrestore(&usblp->lock, flags); |
317c67b8 PZ |
970 | if (nonblock) |
971 | return -EAGAIN; | |
972 | return 1; | |
973 | } | |
1da177e4 | 974 | |
317c67b8 PZ |
975 | /* |
976 | * Please check ->bidir and other such things outside for now. | |
977 | */ | |
978 | static int usblp_submit_read(struct usblp *usblp) | |
979 | { | |
980 | struct urb *urb; | |
981 | unsigned long flags; | |
982 | int rc; | |
983 | ||
984 | rc = -ENOMEM; | |
2fcdbdfd GKH |
985 | urb = usb_alloc_urb(0, GFP_KERNEL); |
986 | if (urb == NULL) | |
317c67b8 PZ |
987 | goto raise_urb; |
988 | ||
989 | usb_fill_bulk_urb(urb, usblp->dev, | |
990 | usb_rcvbulkpipe(usblp->dev, | |
991 | usblp->protocol[usblp->current_protocol].epread->bEndpointAddress), | |
992 | usblp->readbuf, USBLP_BUF_SIZE_IN, | |
993 | usblp_bulk_read, usblp); | |
994 | usb_anchor_urb(urb, &usblp->urbs); | |
995 | ||
996 | spin_lock_irqsave(&usblp->lock, flags); | |
997 | usblp->readcount = 0; /* XXX Why here? */ | |
998 | usblp->rcomplete = 0; | |
999 | spin_unlock_irqrestore(&usblp->lock, flags); | |
1000 | if ((rc = usb_submit_urb(urb, GFP_KERNEL)) < 0) { | |
4f306309 | 1001 | dev_dbg(&usblp->intf->dev, "error submitting urb (%d)\n", rc); |
317c67b8 PZ |
1002 | spin_lock_irqsave(&usblp->lock, flags); |
1003 | usblp->rstatus = rc; | |
1004 | usblp->rcomplete = 1; | |
1005 | spin_unlock_irqrestore(&usblp->lock, flags); | |
1006 | goto raise_submit; | |
1da177e4 LT |
1007 | } |
1008 | ||
317c67b8 PZ |
1009 | return 0; |
1010 | ||
1011 | raise_submit: | |
1012 | usb_unanchor_urb(urb); | |
1013 | usb_free_urb(urb); | |
1014 | raise_urb: | |
1015 | return rc; | |
1da177e4 LT |
1016 | } |
1017 | ||
1018 | /* | |
1019 | * Checks for printers that have quirks, such as requiring unidirectional | |
1020 | * communication but reporting bidirectional; currently some HP printers | |
1021 | * have this flaw (HP 810, 880, 895, etc.), or needing an init string | |
1022 | * sent at each open (like some Epsons). | |
1023 | * Returns 1 if found, 0 if not found. | |
1024 | * | |
1025 | * HP recommended that we use the bidirectional interface but | |
1026 | * don't attempt any bulk IN transfers from the IN endpoint. | |
1027 | * Here's some more detail on the problem: | |
1028 | * The problem is not that it isn't bidirectional though. The problem | |
1029 | * is that if you request a device ID, or status information, while | |
1030 | * the buffers are full, the return data will end up in the print data | |
1031 | * buffer. For example if you make sure you never request the device ID | |
1032 | * while you are sending print data, and you don't try to query the | |
1033 | * printer status every couple of milliseconds, you will probably be OK. | |
1034 | */ | |
916de027 | 1035 | static unsigned int usblp_quirks(__u16 vendor, __u16 product) |
1da177e4 LT |
1036 | { |
1037 | int i; | |
1038 | ||
1039 | for (i = 0; quirk_printers[i].vendorId; i++) { | |
1040 | if (vendor == quirk_printers[i].vendorId && | |
1041 | product == quirk_printers[i].productId) | |
1042 | return quirk_printers[i].quirks; | |
916de027 | 1043 | } |
1da177e4 LT |
1044 | return 0; |
1045 | } | |
1046 | ||
066202dd | 1047 | static const struct file_operations usblp_fops = { |
1da177e4 LT |
1048 | .owner = THIS_MODULE, |
1049 | .read = usblp_read, | |
1050 | .write = usblp_write, | |
1051 | .poll = usblp_poll, | |
318e479e PZ |
1052 | .unlocked_ioctl = usblp_ioctl, |
1053 | .compat_ioctl = usblp_ioctl, | |
1da177e4 LT |
1054 | .open = usblp_open, |
1055 | .release = usblp_release, | |
6038f373 | 1056 | .llseek = noop_llseek, |
1da177e4 LT |
1057 | }; |
1058 | ||
2c9ede55 | 1059 | static char *usblp_devnode(struct device *dev, umode_t *mode) |
f7a386c5 KS |
1060 | { |
1061 | return kasprintf(GFP_KERNEL, "usb/%s", dev_name(dev)); | |
1062 | } | |
1063 | ||
1da177e4 | 1064 | static struct usb_class_driver usblp_class = { |
d6e5bcf4 | 1065 | .name = "lp%d", |
e454cea2 | 1066 | .devnode = usblp_devnode, |
1da177e4 | 1067 | .fops = &usblp_fops, |
1da177e4 LT |
1068 | .minor_base = USBLP_MINOR_BASE, |
1069 | }; | |
1070 | ||
a9714c84 DW |
1071 | static ssize_t usblp_show_ieee1284_id(struct device *dev, struct device_attribute *attr, char *buf) |
1072 | { | |
1073 | struct usb_interface *intf = to_usb_interface(dev); | |
916de027 | 1074 | struct usblp *usblp = usb_get_intfdata(intf); |
a9714c84 DW |
1075 | |
1076 | if (usblp->device_id_string[0] == 0 && | |
1077 | usblp->device_id_string[1] == 0) | |
1078 | return 0; | |
1079 | ||
1080 | return sprintf(buf, "%s", usblp->device_id_string+2); | |
1081 | } | |
1082 | ||
1083 | static DEVICE_ATTR(ieee1284_id, S_IRUGO, usblp_show_ieee1284_id, NULL); | |
1084 | ||
1da177e4 LT |
1085 | static int usblp_probe(struct usb_interface *intf, |
1086 | const struct usb_device_id *id) | |
1087 | { | |
916de027 | 1088 | struct usb_device *dev = interface_to_usbdev(intf); |
49b707b9 | 1089 | struct usblp *usblp; |
1da177e4 LT |
1090 | int protocol; |
1091 | int retval; | |
1092 | ||
1093 | /* Malloc and start initializing usblp structure so we can use it | |
1094 | * directly. */ | |
49b707b9 JL |
1095 | usblp = kzalloc(sizeof(struct usblp), GFP_KERNEL); |
1096 | if (!usblp) { | |
317c67b8 | 1097 | retval = -ENOMEM; |
49b707b9 | 1098 | goto abort_ret; |
1da177e4 | 1099 | } |
1da177e4 | 1100 | usblp->dev = dev; |
317c67b8 | 1101 | mutex_init(&usblp->wmut); |
916de027 | 1102 | mutex_init(&usblp->mut); |
317c67b8 PZ |
1103 | spin_lock_init(&usblp->lock); |
1104 | init_waitqueue_head(&usblp->rwait); | |
1105 | init_waitqueue_head(&usblp->wwait); | |
1106 | init_usb_anchor(&usblp->urbs); | |
1da177e4 LT |
1107 | usblp->ifnum = intf->cur_altsetting->desc.bInterfaceNumber; |
1108 | usblp->intf = intf; | |
1109 | ||
1da177e4 LT |
1110 | /* Malloc device ID string buffer to the largest expected length, |
1111 | * since we can re-query it on an ioctl and a dynamic string | |
1112 | * could change in length. */ | |
1113 | if (!(usblp->device_id_string = kmalloc(USBLP_DEVICE_ID_SIZE, GFP_KERNEL))) { | |
317c67b8 | 1114 | retval = -ENOMEM; |
1da177e4 LT |
1115 | goto abort; |
1116 | } | |
1117 | ||
317c67b8 PZ |
1118 | /* |
1119 | * Allocate read buffer. We somewhat wastefully | |
1da177e4 | 1120 | * malloc both regardless of bidirectionality, because the |
317c67b8 PZ |
1121 | * alternate setting can be changed later via an ioctl. |
1122 | */ | |
1123 | if (!(usblp->readbuf = kmalloc(USBLP_BUF_SIZE_IN, GFP_KERNEL))) { | |
1124 | retval = -ENOMEM; | |
1da177e4 LT |
1125 | goto abort; |
1126 | } | |
1127 | ||
1128 | /* Allocate buffer for printer status */ | |
1129 | usblp->statusbuf = kmalloc(STATUS_BUF_SIZE, GFP_KERNEL); | |
1130 | if (!usblp->statusbuf) { | |
317c67b8 | 1131 | retval = -ENOMEM; |
1da177e4 LT |
1132 | goto abort; |
1133 | } | |
1134 | ||
1135 | /* Lookup quirks for this printer. */ | |
1136 | usblp->quirks = usblp_quirks( | |
1137 | le16_to_cpu(dev->descriptor.idVendor), | |
1138 | le16_to_cpu(dev->descriptor.idProduct)); | |
1139 | ||
1140 | /* Analyze and pick initial alternate settings and endpoints. */ | |
1141 | protocol = usblp_select_alts(usblp); | |
1142 | if (protocol < 0) { | |
4f306309 GKH |
1143 | dev_dbg(&intf->dev, |
1144 | "incompatible printer-class device 0x%4.4X/0x%4.4X\n", | |
1da177e4 LT |
1145 | le16_to_cpu(dev->descriptor.idVendor), |
1146 | le16_to_cpu(dev->descriptor.idProduct)); | |
317c67b8 | 1147 | retval = -ENODEV; |
1da177e4 LT |
1148 | goto abort; |
1149 | } | |
1150 | ||
1151 | /* Setup the selected alternate setting and endpoints. */ | |
317c67b8 PZ |
1152 | if (usblp_set_protocol(usblp, protocol) < 0) { |
1153 | retval = -ENODEV; /* ->probe isn't ->ioctl */ | |
1da177e4 | 1154 | goto abort; |
317c67b8 | 1155 | } |
1da177e4 LT |
1156 | |
1157 | /* Retrieve and store the device ID string. */ | |
1158 | usblp_cache_device_id_string(usblp); | |
96cede53 GKH |
1159 | retval = device_create_file(&intf->dev, &dev_attr_ieee1284_id); |
1160 | if (retval) | |
1161 | goto abort_intfdata; | |
1da177e4 LT |
1162 | |
1163 | #ifdef DEBUG | |
1164 | usblp_check_status(usblp, 0); | |
1165 | #endif | |
1166 | ||
916de027 | 1167 | usb_set_intfdata(intf, usblp); |
1da177e4 LT |
1168 | |
1169 | usblp->present = 1; | |
1170 | ||
1171 | retval = usb_register_dev(intf, &usblp_class); | |
1172 | if (retval) { | |
4f306309 GKH |
1173 | dev_err(&intf->dev, |
1174 | "usblp: Not able to get a minor (base %u, slice default): %d\n", | |
1175 | USBLP_MINOR_BASE, retval); | |
1da177e4 LT |
1176 | goto abort_intfdata; |
1177 | } | |
1178 | usblp->minor = intf->minor; | |
4f306309 GKH |
1179 | dev_info(&intf->dev, |
1180 | "usblp%d: USB %sdirectional printer dev %d if %d alt %d proto %d vid 0x%4.4X pid 0x%4.4X\n", | |
a9714c84 DW |
1181 | usblp->minor, usblp->bidir ? "Bi" : "Uni", dev->devnum, |
1182 | usblp->ifnum, | |
1183 | usblp->protocol[usblp->current_protocol].alt_setting, | |
1184 | usblp->current_protocol, | |
1185 | le16_to_cpu(usblp->dev->descriptor.idVendor), | |
1186 | le16_to_cpu(usblp->dev->descriptor.idProduct)); | |
1da177e4 LT |
1187 | |
1188 | return 0; | |
1189 | ||
1190 | abort_intfdata: | |
916de027 | 1191 | usb_set_intfdata(intf, NULL); |
a9714c84 | 1192 | device_remove_file(&intf->dev, &dev_attr_ieee1284_id); |
1da177e4 | 1193 | abort: |
49b707b9 JL |
1194 | kfree(usblp->readbuf); |
1195 | kfree(usblp->statusbuf); | |
1196 | kfree(usblp->device_id_string); | |
1197 | kfree(usblp); | |
1198 | abort_ret: | |
317c67b8 | 1199 | return retval; |
1da177e4 LT |
1200 | } |
1201 | ||
1202 | /* | |
1203 | * We are a "new" style driver with usb_device_id table, | |
1204 | * but our requirements are too intricate for simple match to handle. | |
1205 | * | |
1206 | * The "proto_bias" option may be used to specify the preferred protocol | |
298b992f KO |
1207 | * for all USB printers (1=USB_CLASS_PRINTER/1/1, 2=USB_CLASS_PRINTER/1/2, |
1208 | * 3=USB_CLASS_PRINTER/1/3). If the device supports the preferred protocol, | |
1209 | * then we bind to it. | |
1da177e4 | 1210 | * |
298b992f KO |
1211 | * The best interface for us is USB_CLASS_PRINTER/1/2, because it |
1212 | * is compatible with a stream of characters. If we find it, we bind to it. | |
1da177e4 LT |
1213 | * |
1214 | * Note that the people from hpoj.sourceforge.net need to be able to | |
298b992f KO |
1215 | * bind to USB_CLASS_PRINTER/1/3 (MLC/1284.4), so we provide them ioctls |
1216 | * for this purpose. | |
1da177e4 | 1217 | * |
298b992f KO |
1218 | * Failing USB_CLASS_PRINTER/1/2, we look for USB_CLASS_PRINTER/1/3, |
1219 | * even though it's probably not stream-compatible, because this matches | |
1220 | * the behaviour of the old code. | |
1da177e4 | 1221 | * |
298b992f KO |
1222 | * If nothing else, we bind to USB_CLASS_PRINTER/1/1 |
1223 | * - the unidirectional interface. | |
1da177e4 LT |
1224 | */ |
1225 | static int usblp_select_alts(struct usblp *usblp) | |
1226 | { | |
1227 | struct usb_interface *if_alt; | |
1228 | struct usb_host_interface *ifd; | |
5370860a JH |
1229 | struct usb_endpoint_descriptor *epwrite, *epread; |
1230 | int p, i; | |
1231 | int res; | |
1da177e4 LT |
1232 | |
1233 | if_alt = usblp->intf; | |
1234 | ||
1235 | for (p = 0; p < USBLP_MAX_PROTOCOLS; p++) | |
1236 | usblp->protocol[p].alt_setting = -1; | |
1237 | ||
1238 | /* Find out what we have. */ | |
1239 | for (i = 0; i < if_alt->num_altsetting; i++) { | |
1240 | ifd = &if_alt->altsetting[i]; | |
1241 | ||
298b992f KO |
1242 | if (ifd->desc.bInterfaceClass != USB_CLASS_PRINTER || |
1243 | ifd->desc.bInterfaceSubClass != 1) | |
5ec71db5 AS |
1244 | if (!(usblp->quirks & USBLP_QUIRK_BAD_CLASS)) |
1245 | continue; | |
1da177e4 LT |
1246 | |
1247 | if (ifd->desc.bInterfaceProtocol < USBLP_FIRST_PROTOCOL || | |
1248 | ifd->desc.bInterfaceProtocol > USBLP_LAST_PROTOCOL) | |
1249 | continue; | |
1250 | ||
5370860a JH |
1251 | /* Look for the expected bulk endpoints. */ |
1252 | if (ifd->desc.bInterfaceProtocol > 1) { | |
1253 | res = usb_find_common_endpoints(ifd, | |
1254 | &epread, &epwrite, NULL, NULL); | |
1255 | } else { | |
1256 | epread = NULL; | |
1257 | res = usb_find_bulk_out_endpoint(ifd, &epwrite); | |
1da177e4 LT |
1258 | } |
1259 | ||
1260 | /* Ignore buggy hardware without the right endpoints. */ | |
5370860a | 1261 | if (res) |
1da177e4 LT |
1262 | continue; |
1263 | ||
5370860a JH |
1264 | /* Turn off reads for buggy bidirectional printers. */ |
1265 | if (usblp->quirks & USBLP_QUIRK_BIDIR) { | |
317c67b8 PZ |
1266 | printk(KERN_INFO "usblp%d: Disabling reads from " |
1267 | "problematic bidirectional printer\n", | |
1268 | usblp->minor); | |
1da177e4 LT |
1269 | epread = NULL; |
1270 | } | |
1271 | ||
1272 | usblp->protocol[ifd->desc.bInterfaceProtocol].alt_setting = | |
1273 | ifd->desc.bAlternateSetting; | |
1274 | usblp->protocol[ifd->desc.bInterfaceProtocol].epwrite = epwrite; | |
1275 | usblp->protocol[ifd->desc.bInterfaceProtocol].epread = epread; | |
1276 | } | |
1277 | ||
1278 | /* If our requested protocol is supported, then use it. */ | |
1279 | if (proto_bias >= USBLP_FIRST_PROTOCOL && | |
1280 | proto_bias <= USBLP_LAST_PROTOCOL && | |
1281 | usblp->protocol[proto_bias].alt_setting != -1) | |
1282 | return proto_bias; | |
1283 | ||
1284 | /* Ordering is important here. */ | |
1285 | if (usblp->protocol[2].alt_setting != -1) | |
1286 | return 2; | |
1287 | if (usblp->protocol[1].alt_setting != -1) | |
1288 | return 1; | |
1289 | if (usblp->protocol[3].alt_setting != -1) | |
1290 | return 3; | |
1291 | ||
1292 | /* If nothing is available, then don't bind to this device. */ | |
1293 | return -1; | |
1294 | } | |
1295 | ||
1296 | static int usblp_set_protocol(struct usblp *usblp, int protocol) | |
1297 | { | |
1298 | int r, alts; | |
1299 | ||
1300 | if (protocol < USBLP_FIRST_PROTOCOL || protocol > USBLP_LAST_PROTOCOL) | |
1301 | return -EINVAL; | |
1302 | ||
1303 | alts = usblp->protocol[protocol].alt_setting; | |
1304 | if (alts < 0) | |
1305 | return -EINVAL; | |
1306 | r = usb_set_interface(usblp->dev, usblp->ifnum, alts); | |
1307 | if (r < 0) { | |
317c67b8 | 1308 | printk(KERN_ERR "usblp: can't set desired altsetting %d on interface %d\n", |
1da177e4 LT |
1309 | alts, usblp->ifnum); |
1310 | return r; | |
1311 | } | |
1312 | ||
1da177e4 | 1313 | usblp->bidir = (usblp->protocol[protocol].epread != NULL); |
1da177e4 | 1314 | usblp->current_protocol = protocol; |
4f306309 GKH |
1315 | dev_dbg(&usblp->intf->dev, "usblp%d set protocol %d\n", |
1316 | usblp->minor, protocol); | |
1da177e4 LT |
1317 | return 0; |
1318 | } | |
1319 | ||
1320 | /* Retrieves and caches device ID string. | |
1321 | * Returns length, including length bytes but not null terminator. | |
1322 | * On error, returns a negative errno value. */ | |
1323 | static int usblp_cache_device_id_string(struct usblp *usblp) | |
1324 | { | |
1325 | int err, length; | |
1326 | ||
1327 | err = usblp_get_id(usblp, 0, usblp->device_id_string, USBLP_DEVICE_ID_SIZE - 1); | |
1328 | if (err < 0) { | |
4f306309 GKH |
1329 | dev_dbg(&usblp->intf->dev, |
1330 | "usblp%d: error = %d reading IEEE-1284 Device ID string\n", | |
1da177e4 LT |
1331 | usblp->minor, err); |
1332 | usblp->device_id_string[0] = usblp->device_id_string[1] = '\0'; | |
1333 | return -EIO; | |
1334 | } | |
1335 | ||
1336 | /* First two bytes are length in big-endian. | |
1337 | * They count themselves, and we copy them into | |
1338 | * the user's buffer. */ | |
1339 | length = be16_to_cpu(*((__be16 *)usblp->device_id_string)); | |
1340 | if (length < 2) | |
1341 | length = 2; | |
1342 | else if (length >= USBLP_DEVICE_ID_SIZE) | |
1343 | length = USBLP_DEVICE_ID_SIZE - 1; | |
1344 | usblp->device_id_string[length] = '\0'; | |
1345 | ||
4f306309 | 1346 | dev_dbg(&usblp->intf->dev, "usblp%d Device ID string [len=%d]=\"%s\"\n", |
1da177e4 LT |
1347 | usblp->minor, length, &usblp->device_id_string[2]); |
1348 | ||
1349 | return length; | |
1350 | } | |
1351 | ||
1352 | static void usblp_disconnect(struct usb_interface *intf) | |
1353 | { | |
916de027 | 1354 | struct usblp *usblp = usb_get_intfdata(intf); |
1da177e4 LT |
1355 | |
1356 | usb_deregister_dev(intf, &usblp_class); | |
1357 | ||
1358 | if (!usblp || !usblp->dev) { | |
9908a32e | 1359 | dev_err(&intf->dev, "bogus disconnect\n"); |
916de027 | 1360 | BUG(); |
1da177e4 LT |
1361 | } |
1362 | ||
a9714c84 DW |
1363 | device_remove_file(&intf->dev, &dev_attr_ieee1284_id); |
1364 | ||
916de027 NK |
1365 | mutex_lock(&usblp_mutex); |
1366 | mutex_lock(&usblp->mut); | |
1da177e4 | 1367 | usblp->present = 0; |
317c67b8 PZ |
1368 | wake_up(&usblp->wwait); |
1369 | wake_up(&usblp->rwait); | |
916de027 | 1370 | usb_set_intfdata(intf, NULL); |
1da177e4 LT |
1371 | |
1372 | usblp_unlink_urbs(usblp); | |
916de027 | 1373 | mutex_unlock(&usblp->mut); |
1da177e4 LT |
1374 | |
1375 | if (!usblp->used) | |
916de027 NK |
1376 | usblp_cleanup(usblp); |
1377 | mutex_unlock(&usblp_mutex); | |
1da177e4 LT |
1378 | } |
1379 | ||
3a90f818 | 1380 | static int usblp_suspend(struct usb_interface *intf, pm_message_t message) |
516077c1 | 1381 | { |
916de027 | 1382 | struct usblp *usblp = usb_get_intfdata(intf); |
516077c1 | 1383 | |
516077c1 | 1384 | usblp_unlink_urbs(usblp); |
317c67b8 PZ |
1385 | #if 0 /* XXX Do we want this? What if someone is reading, should we fail? */ |
1386 | /* not strictly necessary, but just in case */ | |
1387 | wake_up(&usblp->wwait); | |
1388 | wake_up(&usblp->rwait); | |
1389 | #endif | |
516077c1 ON |
1390 | |
1391 | return 0; | |
1392 | } | |
1393 | ||
3a90f818 | 1394 | static int usblp_resume(struct usb_interface *intf) |
516077c1 | 1395 | { |
916de027 | 1396 | struct usblp *usblp = usb_get_intfdata(intf); |
516077c1 ON |
1397 | int r; |
1398 | ||
916de027 | 1399 | r = handle_bidir(usblp); |
516077c1 | 1400 | |
516077c1 ON |
1401 | return r; |
1402 | } | |
1403 | ||
6ef4852b | 1404 | static const struct usb_device_id usblp_ids[] = { |
298b992f KO |
1405 | { USB_DEVICE_INFO(USB_CLASS_PRINTER, 1, 1) }, |
1406 | { USB_DEVICE_INFO(USB_CLASS_PRINTER, 1, 2) }, | |
1407 | { USB_DEVICE_INFO(USB_CLASS_PRINTER, 1, 3) }, | |
1408 | { USB_INTERFACE_INFO(USB_CLASS_PRINTER, 1, 1) }, | |
1409 | { USB_INTERFACE_INFO(USB_CLASS_PRINTER, 1, 2) }, | |
1410 | { USB_INTERFACE_INFO(USB_CLASS_PRINTER, 1, 3) }, | |
5ec71db5 | 1411 | { USB_DEVICE(0x04b8, 0x0202) }, /* Seiko Epson Receipt Printer M129C */ |
1da177e4 LT |
1412 | { } /* Terminating entry */ |
1413 | }; | |
1414 | ||
916de027 | 1415 | MODULE_DEVICE_TABLE(usb, usblp_ids); |
1da177e4 LT |
1416 | |
1417 | static struct usb_driver usblp_driver = { | |
1da177e4 LT |
1418 | .name = "usblp", |
1419 | .probe = usblp_probe, | |
1420 | .disconnect = usblp_disconnect, | |
516077c1 ON |
1421 | .suspend = usblp_suspend, |
1422 | .resume = usblp_resume, | |
1da177e4 | 1423 | .id_table = usblp_ids, |
d0532184 | 1424 | .supports_autosuspend = 1, |
1da177e4 LT |
1425 | }; |
1426 | ||
65db4305 | 1427 | module_usb_driver(usblp_driver); |
1da177e4 | 1428 | |
916de027 NK |
1429 | MODULE_AUTHOR(DRIVER_AUTHOR); |
1430 | MODULE_DESCRIPTION(DRIVER_DESC); | |
1da177e4 LT |
1431 | module_param(proto_bias, int, S_IRUGO | S_IWUSR); |
1432 | MODULE_PARM_DESC(proto_bias, "Favourite protocol number"); | |
1433 | MODULE_LICENSE("GPL"); |