usblp.c (3a37471551cd3b287ce7f02ed25bcf8ec37a191d) usblp.c (21470e32ca7f976bf131aa3c7b54019d07f7d821)
1/*
2 * usblp.c
3 *
4 * Copyright (c) 1999 Michael Gee <michael@linuxspecific.com>
5 * Copyright (c) 1999 Pavel Machek <pavel@ucw.cz>
6 * Copyright (c) 2000 Randy Dunlap <rdunlap@xenotime.net>
7 * Copyright (c) 2000 Vojtech Pavlik <vojtech@suse.cz>
8 # Copyright (c) 2001 Pete Zaitcev <zaitcev@redhat.com>

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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
1/*
2 * usblp.c
3 *
4 * Copyright (c) 1999 Michael Gee <michael@linuxspecific.com>
5 * Copyright (c) 1999 Pavel Machek <pavel@ucw.cz>
6 * Copyright (c) 2000 Randy Dunlap <rdunlap@xenotime.net>
7 * Copyright (c) 2000 Vojtech Pavlik <vojtech@suse.cz>
8 # Copyright (c) 2001 Pete Zaitcev <zaitcev@redhat.com>

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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
297 * explanation. Look into your /sys/kernel/debug/usb/devices and dmesg in
298 * case of any trouble.
299 */
300static int proto_bias = -1;
301
302/*
303 * URB callback.
304 */
305

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1234 *
1235 * If nothing else, we bind to USB_CLASS_PRINTER/1/1
1236 * - the unidirectional interface.
1237 */
1238static int usblp_select_alts(struct usblp *usblp)
1239{
1240 struct usb_interface *if_alt;
1241 struct usb_host_interface *ifd;
298 * case of any trouble.
299 */
300static int proto_bias = -1;
301
302/*
303 * URB callback.
304 */
305

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1234 *
1235 * If nothing else, we bind to USB_CLASS_PRINTER/1/1
1236 * - the unidirectional interface.
1237 */
1238static 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;
1242 struct usb_endpoint_descriptor *epwrite, *epread;
1243 int p, i;
1244 int res;
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
1254 if (ifd->desc.bInterfaceClass != USB_CLASS_PRINTER ||
1255 ifd->desc.bInterfaceSubClass != 1)
1256 if (!(usblp->quirks & USBLP_QUIRK_BAD_CLASS))
1257 continue;
1258
1259 if (ifd->desc.bInterfaceProtocol < USBLP_FIRST_PROTOCOL ||
1260 ifd->desc.bInterfaceProtocol > USBLP_LAST_PROTOCOL)
1261 continue;
1262
1245
1246 if_alt = usblp->intf;
1247
1248 for (p = 0; p < USBLP_MAX_PROTOCOLS; p++)
1249 usblp->protocol[p].alt_setting = -1;
1250
1251 /* Find out what we have. */
1252 for (i = 0; i < if_alt->num_altsetting; i++) {
1253 ifd = &if_alt->altsetting[i];
1254
1255 if (ifd->desc.bInterfaceClass != USB_CLASS_PRINTER ||
1256 ifd->desc.bInterfaceSubClass != 1)
1257 if (!(usblp->quirks & USBLP_QUIRK_BAD_CLASS))
1258 continue;
1259
1260 if (ifd->desc.bInterfaceProtocol < USBLP_FIRST_PROTOCOL ||
1261 ifd->desc.bInterfaceProtocol > USBLP_LAST_PROTOCOL)
1262 continue;
1263
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
1268 if (usb_endpoint_is_bulk_out(epd))
1269 if (!epwrite)
1270 epwrite = epd;
1271
1272 if (usb_endpoint_is_bulk_in(epd))
1273 if (!epread)
1274 epread = epd;
1264 /* Look for the expected bulk endpoints. */
1265 if (ifd->desc.bInterfaceProtocol > 1) {
1266 res = usb_find_common_endpoints(ifd,
1267 &epread, &epwrite, NULL, NULL);
1268 } else {
1269 epread = NULL;
1270 res = usb_find_bulk_out_endpoint(ifd, &epwrite);
1275 }
1276
1277 /* Ignore buggy hardware without the right endpoints. */
1271 }
1272
1273 /* Ignore buggy hardware without the right endpoints. */
1278 if (!epwrite || (ifd->desc.bInterfaceProtocol > 1 && !epread))
1274 if (res)
1279 continue;
1280
1275 continue;
1276
1281 /*
1282 * Turn off reads for USB_CLASS_PRINTER/1/1 (unidirectional)
1283 * interfaces and buggy bidirectional printers.
1284 */
1285 if (ifd->desc.bInterfaceProtocol == 1) {
1286 epread = NULL;
1287 } else if (usblp->quirks & USBLP_QUIRK_BIDIR) {
1277 /* Turn off reads for buggy bidirectional printers. */
1278 if (usblp->quirks & USBLP_QUIRK_BIDIR) {
1288 printk(KERN_INFO "usblp%d: Disabling reads from "
1289 "problematic bidirectional printer\n",
1290 usblp->minor);
1291 epread = NULL;
1292 }
1293
1294 usblp->protocol[ifd->desc.bInterfaceProtocol].alt_setting =
1295 ifd->desc.bAlternateSetting;

--- 160 unchanged lines hidden --- 		1279 printk(KERN_INFO "usblp%d: Disabling reads from "
1280 "problematic bidirectional printer\n",
1281 usblp->minor);
1282 epread = NULL;
1283 }
1284
1285 usblp->protocol[ifd->desc.bInterfaceProtocol].alt_setting =
1286 ifd->desc.bAlternateSetting;

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