70  * [0]=current protocol
73  * [1]=supported protocol mask (mask&(1<<n)!=0 means
82 #define LPIOC_SET_PROTOCOL _IOC(_IOC_WRITE, 'P', IOCNR_SET_PROTOCOL, 0)
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: */
87 /* Get two-int array: [0]=vendor ID, [1]=product ID: */
90 #define LPIOC_SOFT_RESET _IOC(_IOC_NONE, 'P', IOCNR_SOFT_RESET, 0);
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 */
110 #define USBLP_MINOR_BASE	0
173 	dev_dbg(dev, "usblp=0x%p\n", usblp);  in usblp_dump()
174 	dev_dbg(dev, "dev=0x%p\n", usblp->dev);  in usblp_dump()
176 	dev_dbg(dev, "readbuf=0x%p\n", usblp->readbuf);  in usblp_dump()
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 */
211 #define USBLP_QUIRK_BAD_CLASS	0x4	/* descriptor uses vendor-specific Class or SubClass */
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 */
220 	{ 0x03f0, 0x0604, USBLP_QUIRK_BIDIR }, /* HP DeskJet 840C */
221 	{ 0x03f0, 0x0804, USBLP_QUIRK_BIDIR }, /* HP DeskJet 816C */
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) */
227 	{ 0x0482, 0x0010, USBLP_QUIRK_BIDIR }, /* Kyocera Mita FS 820, by zut <kernel@zut.de> */
228 	{ 0x04f9, 0x000d, USBLP_QUIRK_BIDIR }, /* Brother Industries, Ltd HL-1440 Laser Printer */
229 	{ 0x04b8, 0x0202, USBLP_QUIRK_BAD_CLASS }, /* Seiko Epson Receipt Printer M129C */
230 	{ 0, 0 }
262 		dir ? usb_rcvctrlpipe(usblp->dev, 0) : usb_sndctrlpipe(usblp->dev, 0),  in usblp_ctrl_msg()
265 		"usblp_control_msg: rq: 0x%02x dir: %d recip: %d value: %d idx: %d len: %#x result: %d\n",  in usblp_ctrl_msg()
267 	return retval < 0 ? retval : 0;  in usblp_ctrl_msg()
271 …usblp_ctrl_msg(usblp, USBLP_REQ_GET_STATUS, USB_TYPE_CLASS, USB_DIR_IN, USB_RECIP_INTERFACE, 0, st…
275 	usblp_ctrl_msg(usblp, USBLP_REQ_RESET, USB_TYPE_CLASS, USB_DIR_OUT, USB_RECIP_OTHER, 0, NULL, 0)
289 	if (ret == 0)  in usblp_hp_channel_change_request()
290 		*new_channel = buf[0];  in usblp_hp_channel_change_request()
321 	if (status < 0)  in usblp_bulk_read()
345 	if (status < 0)  in usblp_bulk_write()
349 	usblp->no_paper = 0;  in usblp_bulk_write()
365 	unsigned char status, newerr = 0;  in usblp_check_status()
369 	if ((error = usblp_read_status(usblp, usblp->statusbuf)) < 0) {  in usblp_check_status()
374 		return 0;  in usblp_check_status()
397 		if (usblp_submit_read(usblp) < 0)  in handle_bidir()
400 	return 0;  in handle_bidir()
414 	if (minor < 0)  in usblp_open()
438 	if (retval < 0)  in usblp_open()
444 	usblp->wstatus = 0;  in usblp_open()
445 	usblp->rcomplete = 0;  in usblp_open()
447 	if (handle_bidir(usblp) < 0) {  in usblp_open()
449 		usblp->used = 0;  in usblp_open()
481 	usblp->used = 0;  in usblp_release()
491 	return 0;  in usblp_release()
498 	__poll_t ret = 0;  in usblp_poll()
526 	int retval = 0;  in usblp_ioctl()
535 		"usblp_ioctl: cmd=0x%x (%c nr=%d len=%d dir=%d)\n", cmd,  in usblp_ioctl()
549 			if (length < 0) {  in usblp_ioctl()
572 			twoints[0] = usblp->current_protocol;  in usblp_ioctl()
573 			twoints[1] = 0;  in usblp_ioctl()
576 				if (usblp->protocol[i].alt_setting >= 0)  in usblp_ioctl()
604 			if (retval < 0) {  in usblp_ioctl()
612 			    le16_to_cpu(usblp->dev->descriptor.idVendor) != 0x03F0 ||  in usblp_ioctl()
620 			if (err < 0) {  in usblp_ioctl()
641 			twoints[0] = usblp->dev->bus->busnum;  in usblp_ioctl()
652 				usblp->minor, twoints[0], twoints[1]);  in usblp_ioctl()
662 			twoints[0] = le16_to_cpu(usblp->dev->descriptor.idVendor);  in usblp_ioctl()
672 				"usblp%d is VID=0x%4.4X, PID=0x%4.4X\n",  in usblp_ioctl()
673 				usblp->minor, twoints[0], twoints[1]);  in usblp_ioctl()
727 	urb = usb_alloc_urb(0, GFP_KERNEL);  in usblp_new_writeurb()
748 	ssize_t writecount = 0;  in usblp_write()
754 	if ((rv = usblp_wwait(usblp, !!(file->f_flags & O_NONBLOCK))) < 0)  in usblp_write()
777 		usblp->wcomplete = 0;  in usblp_write()
779 		if ((rv = usb_submit_urb(writeurb, GFP_KERNEL)) < 0) {  in usblp_write()
780 			usblp->wstatus = 0;  in usblp_write()
782 			usblp->no_paper = 0;  in usblp_write()
795 		if (rv < 0) {  in usblp_write()
810 		if (usblp->wstatus < 0) {  in usblp_write()
852 	if (rv < 0)  in usblp_read()
860 	if ((avail = usblp->rstatus) < 0) {  in usblp_read()
869 	if (count != 0 &&  in usblp_read()
876 		if (usblp_submit_read(usblp) < 0) {  in usblp_read()
878 			if (count == 0)  in usblp_read()
904 	int err = 0;  in usblp_wwait()
915 		if (rc <= 0)  in usblp_wwait()
918 		if (schedule_timeout(msecs_to_jiffies(1500)) == 0) {  in usblp_wwait()
949 		return 0;  in usblp_wtest()
976 		if ((rc = usblp_rtest(usblp, nonblock)) < 0) {  in usblp_rwait_and_lock()
980 		if (rc == 0)	/* Keep it locked */  in usblp_rwait_and_lock()
1001 		return 0;  in usblp_rtest()
1019 	urb = usb_alloc_urb(0, GFP_KERNEL);  in usblp_submit_read()
1031 	usblp->readcount = 0; /* XXX Why here? */  in usblp_submit_read()
1032 	usblp->rcomplete = 0;  in usblp_submit_read()
1034 	if ((rc = usb_submit_urb(urb, GFP_KERNEL)) < 0) {  in usblp_submit_read()
1043 	return 0;  in usblp_submit_read()
1057  * Returns 1 if found, 0 if not found.
1073 	for (i = 0; quirk_printers[i].vendorId; i++) {  in usblp_quirks()
1078 	return 0;  in usblp_quirks()
1110 	if (usblp->device_id_string[0] == 0 &&  in ieee1284_id_show()
1111 	    usblp->device_id_string[1] == 0)  in ieee1284_id_show()
1112 		return 0;  in ieee1284_id_show()
1182 	if (protocol < 0) {  in usblp_probe()
1184 			"incompatible printer-class device 0x%4.4X/0x%4.4X\n",  in usblp_probe()
1192 	if (usblp_set_protocol(usblp, protocol) < 0) {  in usblp_probe()
1201 	usblp_check_status(usblp, 0);  in usblp_probe()
1217 		"usblp%d: USB %sdirectional printer dev %d if %d alt %d proto %d vid 0x%4.4X pid 0x%4.4X\n",  in usblp_probe()
1225 	return 0;  in usblp_probe()
1272 	for (p = 0; p < USBLP_MAX_PROTOCOLS; p++)  in usblp_select_alts()
1276 	for (i = 0; i < if_alt->num_altsetting; i++) {  in usblp_select_alts()
1343 		if (alts < 0)  in usblp_set_protocol()
1346 		if (r < 0) {  in usblp_set_protocol()
1357 	return 0;  in usblp_set_protocol()
1367 	err = usblp_get_id(usblp, 0, usblp->device_id_string, USBLP_DEVICE_ID_SIZE - 1);  in usblp_cache_device_id_string()
1368 	if (err < 0) {  in usblp_cache_device_id_string()
1372 		usblp->device_id_string[0] = usblp->device_id_string[1] = '\0';  in usblp_cache_device_id_string()
1384 	usblp->device_id_string[length] = '\0';  in usblp_cache_device_id_string()
1405 	usblp->present = 0;  in usblp_disconnect()
1425 #if 0 /* XXX Do we want this? What if someone is reading, should we fail? */  in usblp_suspend()
1431 	return 0;  in usblp_suspend()
1451 	{ USB_DEVICE(0x04b8, 0x0202) },	/* Seiko Epson Receipt Printer M129C */