summaryrefslogtreecommitdiff
path: root/sys/dev/usb/udl.c
blob: 35ee1fdab9915256b278f635484012ed643e8d23 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
1090
1091
1092
1093
1094
1095
1096
1097
1098
1099
1100
1101
1102
1103
1104
1105
1106
1107
1108
1109
1110
1111
1112
1113
1114
1115
1116
1117
1118
1119
1120
1121
1122
1123
1124
1125
1126
1127
1128
1129
1130
1131
1132
1133
1134
1135
1136
1137
1138
1139
1140
1141
1142
1143
1144
1145
1146
1147
1148
1149
1150
1151
1152
1153
1154
1155
1156
1157
1158
1159
1160
1161
1162
1163
1164
1165
1166
1167
1168
1169
1170
1171
1172
1173
1174
1175
1176
1177
1178
1179
1180
1181
1182
1183
1184
1185
1186
1187
1188
1189
1190
1191
1192
1193
1194
1195
1196
1197
1198
1199
1200
1201
1202
1203
1204
1205
1206
1207
1208
1209
1210
1211
1212
1213
1214
1215
1216
1217
1218
1219
1220
1221
1222
1223
1224
1225
1226
1227
1228
1229
1230
1231
1232
1233
1234
1235
1236
1237
1238
1239
1240
1241
1242
1243
1244
1245
1246
1247
1248
1249
1250
1251
1252
1253
1254
1255
1256
1257
1258
1259
1260
1261
1262
1263
1264
1265
1266
1267
1268
1269
1270
1271
1272
1273
1274
1275
1276
1277
1278
1279
1280
1281
1282
1283
1284
1285
1286
1287
1288
1289
1290
1291
1292
1293
1294
1295
1296
1297
1298
1299
1300
1301
1302
1303
1304
1305
1306
1307
1308
1309
1310
1311
1312
1313
1314
1315
1316
1317
1318
1319
1320
1321
1322
1323
1324
1325
1326
1327
1328
1329
1330
1331
1332
1333
1334
1335
1336
1337
1338
1339
1340
1341
1342
1343
1344
1345
1346
1347
1348
1349
1350
1351
1352
1353
1354
1355
1356
1357
1358
1359
1360
1361
1362
1363
1364
1365
1366
1367
1368
1369
1370
1371
1372
1373
1374
1375
1376
1377
1378
1379
1380
1381
1382
1383
1384
1385
1386
1387
1388
1389
1390
1391
1392
1393
1394
1395
/*	$OpenBSD: udl.c,v 1.21 2009/08/02 10:38:34 miod Exp $ */

/*
 * Copyright (c) 2009 Marcus Glocker <mglocker@openbsd.org>
 *
 * Permission to use, copy, modify, and distribute this software for any
 * purpose with or without fee is hereby granted, provided that the above
 * copyright notice and this permission notice appear in all copies.
 *
 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
 */

/*
 * Driver for the ``DisplayLink DL-120 / DL-160'' graphic chips based
 * on the reversed engineered specifications of Florian Echtler
 * <floe@butterbrot.org>:
 *
 * 	http://floe.butterbrot.org/displaylink/doku.php
 *
 * This driver has been inspired by the cfxga(4) driver because we have
 * to deal with similar challenges, like no direct access to the video
 * memory.
 */

#include <sys/param.h>
#include <sys/device.h>
#include <sys/malloc.h>
#include <uvm/uvm.h>

#include <machine/bus.h>

#include <dev/usb/usb.h>
#include <dev/usb/usbdi.h>
#include <dev/usb/usbdi_util.h>
#include <dev/usb/usbdevs.h>

#include <dev/wscons/wsconsio.h>
#include <dev/wscons/wsdisplayvar.h>
#include <dev/rasops/rasops.h>

#include <dev/usb/udl.h>

/*
 * Defines.
 */
#if 0
#define UDL_DEBUG
#endif
#ifdef UDL_DEBUG
int udl_debug = 1;
#define DPRINTF(l, x...) do { if ((l) <= udl_debug) printf(x); } while (0)
#else
#define DPRINTF(l, x...)
#endif

#define DN(sc)		((sc)->sc_dev.dv_xname)
#define FUNC		__func__

/*
 * Prototypes.
 */
int		udl_match(struct device *, void *, void *);
void		udl_attach(struct device *, struct device *, void *);
int		udl_detach(struct device *, int);
int		udl_activate(struct device *, enum devact);

int		udl_ioctl(void *, u_long, caddr_t, int, struct proc *);
paddr_t		udl_mmap(void *, off_t, int);
int		udl_alloc_screen(void *, const struct wsscreen_descr *,
		    void **, int *, int *, long *);
void		udl_free_screen(void *, void *);
int		udl_show_screen(void *, void *, int,
		    void (*)(void *, int, int), void *);
void		udl_burner(void *, u_int, u_int);

void		udl_copycols(void *, int, int, int, int);
void		udl_copyrows(void *, int, int, int);
void		udl_erasecols(void *, int, int, int, long);
void		udl_eraserows(void *, int, int, long);
void		udl_putchar(void *, int, int, u_int, long);
void		udl_do_cursor(struct rasops_info *);

usbd_status	udl_ctrl_msg(struct udl_softc *, uint8_t, uint8_t,
		    uint16_t, uint16_t, uint8_t *, size_t);
usbd_status	udl_poll(struct udl_softc *, uint32_t *);
usbd_status	udl_read_1(struct udl_softc *, uint16_t, uint8_t *);
usbd_status	udl_write_1(struct udl_softc *, uint16_t, uint8_t);
usbd_status	udl_read_edid(struct udl_softc *, uint8_t *);
usbd_status	udl_set_enc_key(struct udl_softc *, uint8_t *, uint8_t);
usbd_status	udl_set_decomp_table(struct udl_softc *, uint8_t *, uint16_t);

usbd_status	udl_cmd_alloc_xfer(struct udl_softc *);
void		udl_cmd_free_xfer(struct udl_softc *);
int		udl_cmd_alloc_buf(struct udl_softc *);
void		udl_cmd_free_buf(struct udl_softc *);
void		udl_cmd_insert_int_1(struct udl_softc *, uint8_t);
void		udl_cmd_insert_int_2(struct udl_softc *, uint16_t);
void		udl_cmd_insert_int_3(struct udl_softc *, uint32_t);
void		udl_cmd_insert_int_4(struct udl_softc *, uint32_t);
void		udl_cmd_insert_buf(struct udl_softc *, uint8_t *, uint32_t);
void		udl_cmd_insert_check(struct udl_cmd_buf *, int);
void		udl_cmd_write_reg_1(struct udl_softc *, uint8_t, uint8_t);
void		udl_cmd_write_reg_3(struct udl_softc *, uint8_t, uint32_t);
usbd_status	udl_cmd_send(struct udl_softc *);
usbd_status	udl_cmd_send_async(struct udl_softc *);
void		udl_cmd_send_async_cb(usbd_xfer_handle, usbd_private_handle,
		    usbd_status);

usbd_status	udl_init_chip(struct udl_softc *);
void		udl_init_fb_offsets(struct udl_softc *, uint32_t, uint32_t,
		    uint32_t, uint32_t);
usbd_status	udl_init_resolution(struct udl_softc *, uint8_t *, uint8_t);
void		udl_fb_off_write(struct udl_softc *, uint16_t, uint32_t,
		    uint16_t);
void		udl_fb_line_write(struct udl_softc *, uint16_t, uint32_t,
		    uint32_t, uint32_t);
void		udl_fb_block_write(struct udl_softc *, uint16_t, uint32_t,
		    uint32_t, uint32_t, uint32_t);
void		udl_fb_buf_write(struct udl_softc *, uint8_t *, uint32_t,
		    uint32_t, uint16_t);
void		udl_fb_off_copy(struct udl_softc *, uint32_t, uint32_t,
		    uint16_t);
void		udl_fb_line_copy(struct udl_softc *, uint32_t, uint32_t,
		    uint32_t, uint32_t, uint32_t);
void		udl_fb_block_copy(struct udl_softc *, uint32_t, uint32_t,
		    uint32_t, uint32_t, uint32_t, uint32_t);
void		udl_draw_char(struct udl_softc *, uint16_t, uint16_t, u_int,
		    uint32_t, uint32_t);
#ifdef UDL_DEBUG
void		udl_hexdump(void *, int, int);
usbd_status	udl_init_test(struct udl_softc *);
#endif

/*
 * Driver glue.
 */
struct cfdriver udl_cd = {
	NULL, "udl", DV_DULL
};

const struct cfattach udl_ca = {
	sizeof(struct udl_softc),
	udl_match,
	udl_attach,
	udl_detach,
	udl_activate
};

/*
 * wsdisplay glue.
 */
struct wsscreen_descr udl_stdscreen = {
	"std",			/* name */
	0, 0,			/* ncols, nrows */
	NULL,			/* textops */
	0, 0,			/* fontwidth, fontheight */
	WSSCREEN_WSCOLORS	/* capabilities */
};

const struct wsscreen_descr *udl_scrlist[] = {
	&udl_stdscreen
};

struct wsscreen_list udl_screenlist = {
	sizeof(udl_scrlist) / sizeof(struct wsscreen_descr *), udl_scrlist
};

struct wsdisplay_accessops udl_accessops = {
	udl_ioctl,
	udl_mmap,
	udl_alloc_screen,
	udl_free_screen,
	udl_show_screen,
	NULL,
	NULL,
	NULL,
	udl_burner
};

/*
 * Matching devices.
 */
static const struct usb_devno udl_devs[] = {
	{ USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_LCD4300U },
	{ USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_LCD8000U },
	{ USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_VCUD60 },
	{ USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_DLDVI },
	{ USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_VGA10 },
	{ USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_WSDVI },
	{ USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_EC008 },
	{ USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_HPDOCK },
	{ USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_M01061 },
	{ USB_VENDOR_DISPLAYLINK, USB_PRODUCT_DISPLAYLINK_SWDVI }
};

int
udl_match(struct device *parent, void *match, void *aux)
{
	struct usb_attach_arg *uaa = aux;

	if (uaa->iface != NULL)
		return (UMATCH_NONE);

	if (usb_lookup(udl_devs, uaa->vendor, uaa->product) != NULL)
		return (UMATCH_VENDOR_PRODUCT);

	return (UMATCH_NONE);
}

void
udl_attach(struct device *parent, struct device *self, void *aux)
{
	struct udl_softc *sc = (struct udl_softc *)self;
	struct usb_attach_arg *uaa = aux;
	struct wsemuldisplaydev_attach_args aa;
	usbd_status error;
	int err;

	sc->sc_udev = uaa->device;

	/*
	 * Set device configuration descriptor number.
	 */
	error = usbd_set_config_no(sc->sc_udev, 1, 0);
	if (error != USBD_NORMAL_COMPLETION)
		return;

	/*
	 * Create device handle to interface descriptor.
	 */
	error = usbd_device2interface_handle(sc->sc_udev, 0, &sc->sc_iface);
	if (error != USBD_NORMAL_COMPLETION)
		return;

	/*
	 * Allocate bulk command xfer.
	 */
	error = udl_cmd_alloc_xfer(sc);
	if (error != USBD_NORMAL_COMPLETION)
		return;

	/*
	 * Allocate command buffer.
	 */
	err = udl_cmd_alloc_buf(sc);
	if (err != 0)
		return;

	/*
	 * Open bulk TX pipe.
	 */
	error = usbd_open_pipe(sc->sc_iface, 0x01, USBD_EXCLUSIVE_USE,
	    &sc->sc_tx_pipeh);
	if (error != USBD_NORMAL_COMPLETION)
		return;

	/*
	 * Initialize chip.
	 */
	error = udl_init_chip(sc);
	if (error != USBD_NORMAL_COMPLETION)
		return;

	/*
	 * Initialize resolution.
	 */
	sc->sc_width = 800;	/* XXX shouldn't we do this somewhere else? */
	sc->sc_height = 600;
	sc->sc_depth = 16;

	error = udl_init_resolution(sc, udl_reg_vals_800,
	    sizeof(udl_reg_vals_800));
	if (error != USBD_NORMAL_COMPLETION)
		return;

	/*
	 * Attach wsdisplay.
	 */
	aa.console = 0;
	aa.scrdata = &udl_screenlist;
	aa.accessops = &udl_accessops;
	aa.accesscookie = sc;
	aa.defaultscreens = 0;

	sc->sc_wsdisplay = config_found(self, &aa, wsemuldisplaydevprint);

	usbd_add_drv_event(USB_EVENT_DRIVER_ATTACH, sc->sc_udev, &sc->sc_dev);
}

int
udl_detach(struct device *self, int flags)
{
	struct udl_softc *sc = (struct udl_softc *)self;

	/*
	 * Close bulk TX pipe.
	 */
	if (sc->sc_tx_pipeh != NULL) {
		usbd_abort_pipe(sc->sc_tx_pipeh);
		usbd_close_pipe(sc->sc_tx_pipeh);
	}

	/*
	 * Free command buffer.
	 */
	udl_cmd_free_buf(sc);

	/*
	 * Free command xfer.
	 */
	udl_cmd_free_xfer(sc);

	/*
	 * Detach wsdisplay.
	 */
	if (sc->sc_wsdisplay != NULL)
		config_detach(sc->sc_wsdisplay, DETACH_FORCE);

	usbd_add_drv_event(USB_EVENT_DRIVER_DETACH, sc->sc_udev, &sc->sc_dev);

	return (0);
}

int
udl_activate(struct device *self, enum devact act)
{
	switch (act) {
	case DVACT_ACTIVATE:
		break;
	case DVACT_DEACTIVATE:
		break;
	}

	return (0);
}

/* ---------- */

int
udl_ioctl(void *v, u_long cmd, caddr_t data, int flag, struct proc *p)
{
	struct udl_softc *sc;

	sc = v;

	DPRINTF(1, "%s: %s: ('%c', %d, %d)\n",
	    DN(sc), FUNC, IOCGROUP(cmd), cmd & 0xff, IOCPARM_LEN(cmd));

	/* TODO */
	switch (cmd) {
	case WSDISPLAYIO_GTYPE:
		*(u_int *)data = WSDISPLAY_TYPE_DL;
		break;
	default:
		return (-1);
	}

	return (0);
}

paddr_t
udl_mmap(void *v, off_t off, int prot)
{
	struct udl_softc *sc;

	sc = v;

	DPRINTF(1, "%s: %s\n", DN(sc), FUNC);

	return (-1);
}

int
udl_alloc_screen(void *v, const struct wsscreen_descr *type,
    void **cookiep, int *curxp, int *curyp, long *attrp)
{
	struct udl_softc *sc = v;
	struct wsdisplay_font *font;

	DPRINTF(1, "%s: %s\n", DN(sc), FUNC);

	if (sc->sc_nscreens > 0)
		return (ENOMEM);

	/*
	 * Initialize rasops.
	 */
	sc->sc_ri.ri_depth = sc->sc_depth;
	sc->sc_ri.ri_bits = NULL;
	sc->sc_ri.ri_width = sc->sc_width;
	sc->sc_ri.ri_height = sc->sc_height;
	sc->sc_ri.ri_stride = sc->sc_width * sc->sc_height / 8;
	sc->sc_ri.ri_hw = (void *)sc;
	sc->sc_ri.ri_flg = 0;

	/* swap B and R at 16 bpp */
	if (sc->sc_depth == 16) {
		sc->sc_ri.ri_rnum = 5;
		sc->sc_ri.ri_rpos = 11;
		sc->sc_ri.ri_gnum = 6;
		sc->sc_ri.ri_gpos = 5;
		sc->sc_ri.ri_bnum = 5;
		sc->sc_ri.ri_bpos = 0;
	}

	rasops_init(&sc->sc_ri, 100, 100);

	sc->sc_ri.ri_ops.copycols = udl_copycols;
	sc->sc_ri.ri_ops.copyrows = udl_copyrows;
	sc->sc_ri.ri_ops.erasecols = udl_erasecols;
	sc->sc_ri.ri_ops.eraserows = udl_eraserows;
	sc->sc_ri.ri_ops.putchar = udl_putchar;
	sc->sc_ri.ri_do_cursor = udl_do_cursor;

	sc->sc_ri.ri_ops.alloc_attr(&sc->sc_ri, 0, 0, 0, attrp);

	udl_stdscreen.nrows = sc->sc_ri.ri_rows;
	udl_stdscreen.ncols = sc->sc_ri.ri_cols;
	udl_stdscreen.textops = &sc->sc_ri.ri_ops;
	udl_stdscreen.fontwidth = sc->sc_ri.ri_font->fontwidth;
	udl_stdscreen.fontheight = sc->sc_ri.ri_font->fontheight;
	udl_stdscreen.capabilities = sc->sc_ri.ri_caps;

	*cookiep = &sc->sc_ri;
	*curxp = 0;
	*curyp = 0;

	sc->sc_nscreens++;

	font = sc->sc_ri.ri_font;
	DPRINTF(1, "%s: %s: using font %s (%dx%d)\n",
	    DN(sc), FUNC, font->name, sc->sc_ri.ri_cols, sc->sc_ri.ri_rows);

	return (0);
}

void
udl_free_screen(void *v, void *cookie)
{
	struct udl_softc *sc;

	sc = v;

	DPRINTF(1, "%s: %s\n", DN(sc), FUNC);
}

int
udl_show_screen(void *v, void *cookie, int waitok,
    void (*cb)(void *, int, int), void *cbarg)
{
	struct udl_softc *sc;

	sc = v;

	DPRINTF(1, "%s: %s\n", DN(sc), FUNC);

	return (0);
}

void
udl_burner(void *v, u_int on, u_int flags)
{
	struct udl_softc *sc;

	sc = v;

	DPRINTF(1, "%s: %s: screen %s\n", DN(sc), FUNC, on ? "ON" : "OFF");

	if (on)
		udl_cmd_write_reg_1(sc, UDL_REG_SCREEN, UDL_REG_SCREEN_ON);
	else
		udl_cmd_write_reg_1(sc, UDL_REG_SCREEN, UDL_REG_SCREEN_OFF);

	udl_cmd_write_reg_1(sc, UDL_REG_SYNC, 0xff);

	(void)udl_cmd_send_async(sc);
}

/* ---------- */

void
udl_copycols(void *cookie, int row, int src, int dst, int num)
{
	struct rasops_info *ri = cookie;
	struct udl_softc *sc;
	int sx, sy, dx, dy, cx, cy;

	sc = ri->ri_hw;

	DPRINTF(2, "%s: %s: row=%d, src=%d, dst=%d, num=%d\n",
	    DN(sc), FUNC, row, src, dst, num);

	sx = src * ri->ri_font->fontwidth;
	sy = row * ri->ri_font->fontheight;
	dx = dst * ri->ri_font->fontwidth;
	dy = row * ri->ri_font->fontheight;
	cx = num * ri->ri_font->fontwidth;
	cy = ri->ri_font->fontheight;

	udl_fb_block_copy(sc, sx, sy, dx, dy, cx, cy);

	(void)udl_cmd_send_async(sc);
}

void
udl_copyrows(void *cookie, int src, int dst, int num)
{
	struct rasops_info *ri = cookie;
	struct udl_softc *sc;
	int sy, dy, cx, cy;

	sc = ri->ri_hw;

	DPRINTF(2, "%s: %s: src=%d, dst=%d, num=%d\n",
	    DN(sc), FUNC, src, dst, num);

	sy = src * sc->sc_ri.ri_font->fontheight;
	dy = dst * sc->sc_ri.ri_font->fontheight;
	cx = sc->sc_ri.ri_emuwidth;
	cy = num * sc->sc_ri.ri_font->fontheight;

	/* copy row block to off-screen first to fix overlay-copy problem */
	udl_fb_block_copy(sc, 0, sy, 0, sc->sc_ri.ri_emuheight, cx, cy);

	/* copy row block back from off-screen now */
	udl_fb_block_copy(sc, 0, sc->sc_ri.ri_emuheight, 0, dy, cx, cy);

	(void)udl_cmd_send_async(sc);
}

void
udl_erasecols(void *cookie, int row, int col, int num, long attr)
{
	struct rasops_info *ri = cookie;
	struct udl_softc *sc = ri->ri_hw;
	uint16_t bgc;
	int fg, bg;
	int x, y, cx, cy;

	sc = ri->ri_hw;

	DPRINTF(2, "%s: %s: row=%d, col=%d, num=%d\n",
	    DN(sc), FUNC, row, col, num);

	sc->sc_ri.ri_ops.unpack_attr(cookie, attr, &fg, &bg, NULL);
	bgc = (uint16_t)sc->sc_ri.ri_devcmap[bg];

	x = col * sc->sc_ri.ri_font->fontwidth;
	y = row * sc->sc_ri.ri_font->fontheight;
	cx = num * sc->sc_ri.ri_font->fontwidth;
	cy = sc->sc_ri.ri_font->fontheight;

	udl_fb_block_write(sc, bgc, x, y, cx, cy);

	(void)udl_cmd_send_async(sc);
}

void
udl_eraserows(void *cookie, int row, int num, long attr)
{
	struct rasops_info *ri = cookie;
	struct udl_softc *sc;
	uint16_t bgc;
	int fg, bg;
	int x, y, cx, cy;

	sc = ri->ri_hw;

	DPRINTF(2, "%s: %s: row=%d, num=%d\n", DN(sc), FUNC, row, num);

	sc->sc_ri.ri_ops.unpack_attr(cookie, attr, &fg, &bg, NULL);
	bgc = (uint16_t)sc->sc_ri.ri_devcmap[bg];

	x = 0;
	y = row * sc->sc_ri.ri_font->fontheight;
	cx = sc->sc_ri.ri_emuwidth;
	cy = num * sc->sc_ri.ri_font->fontheight;

	udl_fb_block_write(sc, bgc, x, y, cx, cy);

	(void)udl_cmd_send_async(sc);
}

void
udl_putchar(void *cookie, int row, int col, u_int uc, long attr)
{
	struct rasops_info *ri = cookie;
	struct udl_softc *sc = ri->ri_hw;
	uint16_t fgc, bgc;
	uint32_t x, y, fg, bg;

	DPRINTF(2, "%s: %s\n", DN(sc), FUNC);

	sc->sc_ri.ri_ops.unpack_attr(cookie, attr, &fg, &bg, NULL);
	fgc = (uint16_t)sc->sc_ri.ri_devcmap[fg];
	bgc = (uint16_t)sc->sc_ri.ri_devcmap[bg];

	x = col * ri->ri_font->fontwidth;
	y = row * ri->ri_font->fontheight;

	if (uc == ' ') {
		/*
		 * Writting a block for the space character instead rendering
		 * it from font bits is more slim.
		 */
		udl_fb_block_write(sc, bgc, x, y,
		    ri->ri_font->fontwidth, ri->ri_font->fontheight);
	} else {
		/* render a character from font bits */
		udl_draw_char(sc, fgc, bgc, uc, x, y);
	}

	/*
	 * We don't call udl_cmd_send_async() here, since sending each
	 * character by itself gets the performance down bad.  Instead the
	 * character will be buffered until another rasops function flush
	 * the buffer.
	 */
}

void
udl_do_cursor(struct rasops_info *ri)
{
	struct udl_softc *sc = ri->ri_hw;
	uint32_t x, y;

	/*
	 * XXX
	 * We can't draw a transparent cursor yet because the chip
	 * doesn't offer an XOR command nor a read command for screen
	 * regions.  Maybe this gets fixed once when wscons(4) is able
	 * to remember the on-screen characters.
	 */

	DPRINTF(2, "%s: %s: ccol=%d, crow=%d\n",
	    DN(sc), FUNC, ri->ri_ccol, ri->ri_crow);

	x = ri->ri_ccol * ri->ri_font->fontwidth;
	y = ri->ri_crow * ri->ri_font->fontheight;

	if (sc->sc_cursor_on == 0) {
		/* safe the last character block to off-screen */
		udl_fb_block_copy(sc, x, y, 0, sc->sc_ri.ri_emuheight,
		    ri->ri_font->fontwidth, ri->ri_font->fontheight);

		/* draw cursor */
		udl_fb_block_write(sc, 0xffff, x, y,
		    ri->ri_font->fontwidth, ri->ri_font->fontheight);

		sc->sc_cursor_on = 1;
	} else {
		/* restore the last safed character from off-screen */
		udl_fb_block_copy(sc, 0, sc->sc_ri.ri_emuheight, x, y,
		    ri->ri_font->fontwidth, ri->ri_font->fontheight);

		sc->sc_cursor_on = 0;
	}

	(void)udl_cmd_send_async(sc);
}

/* ---------- */

usbd_status
udl_ctrl_msg(struct udl_softc *sc, uint8_t rt, uint8_t r,
    uint16_t index, uint16_t value, uint8_t *buf, size_t len)
{
	usb_device_request_t req;
	usbd_status error;

	req.bmRequestType = rt;
	req.bRequest = r;
	USETW(req.wIndex, index);
	USETW(req.wValue, value);
	USETW(req.wLength, len);

	error = usbd_do_request(sc->sc_udev, &req, buf);
	if (error != USBD_NORMAL_COMPLETION) {
		printf("%s: %s: %s!\n", DN(sc), FUNC, usbd_errstr(error));
		return (error);
	}

	return (USBD_NORMAL_COMPLETION);
}

usbd_status
udl_poll(struct udl_softc *sc, uint32_t *buf)
{
	uint8_t lbuf[4];
	usbd_status error;

	error = udl_ctrl_msg(sc, UT_READ_VENDOR_DEVICE,
	    UDL_CTRL_CMD_POLL, 0x0000, 0x0000, lbuf, 4);
	if (error != USBD_NORMAL_COMPLETION) {
		printf("%s: %s: %s!\n", DN(sc), FUNC, usbd_errstr(error));
		return (error);
	}
	*buf = *(uint32_t *)lbuf;

	return (USBD_NORMAL_COMPLETION);
}

usbd_status
udl_read_1(struct udl_softc *sc, uint16_t addr, uint8_t *buf)
{
	uint8_t lbuf[1];
	usbd_status error;

	error = udl_ctrl_msg(sc, UT_READ_VENDOR_DEVICE,
	    UDL_CTRL_CMD_READ_1, addr, 0x0000, lbuf, 1);
	if (error != USBD_NORMAL_COMPLETION) {
		printf("%s: %s: %s!\n", DN(sc), FUNC, usbd_errstr(error));
		return (error);
	}
	*buf = *(uint8_t *)lbuf;

	return (USBD_NORMAL_COMPLETION);
}

usbd_status
udl_write_1(struct udl_softc *sc, uint16_t addr, uint8_t buf)
{
	usbd_status error;

	error = udl_ctrl_msg(sc, UT_WRITE_VENDOR_DEVICE,
	    UDL_CTRL_CMD_WRITE_1, addr, 0x0000, &buf, 1);
	if (error != USBD_NORMAL_COMPLETION) {
		printf("%s: %s: %s!\n", DN(sc), FUNC, usbd_errstr(error));
		return (error);
	}

	return (USBD_NORMAL_COMPLETION);
}

usbd_status
udl_read_edid(struct udl_softc *sc, uint8_t *buf)
{
	uint8_t lbuf[64];
	uint16_t offset;
	usbd_status error;

	offset = 0;

	error = udl_ctrl_msg(sc, UT_READ_VENDOR_DEVICE,
	    UDL_CTRL_CMD_READ_EDID, 0x00a1, (offset << 8), lbuf, 64);
	if (error != USBD_NORMAL_COMPLETION)
		goto fail;
	bcopy(lbuf + 1, buf + offset, 63);
	offset += 63;

	error = udl_ctrl_msg(sc, UT_READ_VENDOR_DEVICE,
	    UDL_CTRL_CMD_READ_EDID, 0x00a1, (offset << 8), lbuf, 64);
	if (error != USBD_NORMAL_COMPLETION)
		goto fail;
	bcopy(lbuf + 1, buf + offset, 63);
	offset += 63;

	error = udl_ctrl_msg(sc, UT_READ_VENDOR_DEVICE,
	    UDL_CTRL_CMD_READ_EDID, 0x00a1, (offset << 8), lbuf, 3);
	if (error != USBD_NORMAL_COMPLETION)
		goto fail;
	bcopy(lbuf + 1, buf + offset, 2);

	return (USBD_NORMAL_COMPLETION);
fail:
	printf("%s: %s: %s!\n", DN(sc), FUNC, usbd_errstr(error));
	return (error);
}

usbd_status
udl_set_enc_key(struct udl_softc *sc, uint8_t *buf, uint8_t len)
{
	usbd_status error;

	error = udl_ctrl_msg(sc, UT_WRITE_VENDOR_DEVICE,
	    UDL_CTRL_CMD_SET_KEY, 0x0000, 0x0000, buf, len);
	if (error != USBD_NORMAL_COMPLETION) {
		printf("%s: %s: %s!\n", DN(sc), FUNC, usbd_errstr(error));
		return (error);
	}
	
	return (USBD_NORMAL_COMPLETION);
}

usbd_status
udl_set_decomp_table(struct udl_softc *sc, uint8_t *buf, uint16_t len)
{
	int err;

	udl_cmd_insert_int_1(sc, UDL_BULK_SOC);
	udl_cmd_insert_int_1(sc, UDL_BULK_CMD_DECOMP);
	udl_cmd_insert_int_4(sc, 0x263871cd);	/* magic number */
	udl_cmd_insert_int_4(sc, 0x00000200);	/* 512 byte chunks */
	udl_cmd_insert_buf(sc, buf, len);

	err = udl_cmd_send(sc);
	if (err != 0)
		return (USBD_INVAL);

	return (USBD_NORMAL_COMPLETION);
}

/* ---------- */

usbd_status
udl_cmd_alloc_xfer(struct udl_softc *sc)
{
	int i;

	for (i = 0; i < UDL_CMD_XFER_COUNT; i++) {
		struct udl_cmd_xfer *cx = &sc->sc_cmd_xfer[i];

		cx->sc = sc;

		cx->xfer = usbd_alloc_xfer(sc->sc_udev);
		if (cx->xfer == NULL) {
			printf("%s: %s: can't allocate xfer handle!\n",
			    DN(sc), FUNC);
			return (USBD_NOMEM);
		}

		cx->buf = usbd_alloc_buffer(cx->xfer, UDL_CMD_MAX_XFER_SIZE);
		if (cx->buf == NULL) {
			printf("%s: %s: can't allocate xfer buffer!\n",
			    DN(sc), FUNC);
			return (USBD_NOMEM);
		}
	}

	return (USBD_NORMAL_COMPLETION);
}

void
udl_cmd_free_xfer(struct udl_softc *sc)
{
	int i;

	for (i = 0; i < UDL_CMD_XFER_COUNT; i++) {
		struct udl_cmd_xfer *cx = &sc->sc_cmd_xfer[i];

		if (cx->xfer != NULL) {
			usbd_free_xfer(cx->xfer);
			cx->xfer = NULL;
		}
	}
}

int
udl_cmd_alloc_buf(struct udl_softc *sc)
{
	struct udl_cmd_buf *cb = &sc->sc_cmd_buf;

	cb->buf = malloc(UDL_CMD_MAX_XFER_SIZE, M_DEVBUF, 0);
	if (cb->buf == NULL) {
		printf("%s: %s: can't allocate buffer!\n",
		    DN(sc), FUNC);
		return (ENOMEM);
	}
	cb->off = 0;

	return (0);
}

void
udl_cmd_free_buf(struct udl_softc *sc)
{
	struct udl_cmd_buf *cb = &sc->sc_cmd_buf;

	free(cb->buf, M_DEVBUF);
	cb->off = 0;
}

void
udl_cmd_insert_int_1(struct udl_softc *sc, uint8_t value)
{
	struct udl_cmd_buf *cb = &sc->sc_cmd_buf;

	udl_cmd_insert_check(cb, 1);

	cb->buf[cb->off] = value;

	cb->off += 1;
}

void
udl_cmd_insert_int_2(struct udl_softc *sc, uint16_t value)
{
	uint16_t lvalue;
	struct udl_cmd_buf *cb = &sc->sc_cmd_buf;

	udl_cmd_insert_check(cb, 2);

	lvalue = htobe16(value);
	bcopy(&lvalue, cb->buf + cb->off, 2);

	cb->off += 2;
}

void
udl_cmd_insert_int_3(struct udl_softc *sc, uint32_t value)
{
	uint32_t lvalue;
	struct udl_cmd_buf *cb = &sc->sc_cmd_buf;

	udl_cmd_insert_check(cb, 3);
#if BYTE_ORDER == BIG_ENDIAN
	lvalue = htobe32(value) << 8;
#else
	lvalue = htobe32(value) >> 8;
#endif
	bcopy(&lvalue, cb->buf + cb->off, 3);

	cb->off += 3;
}

void
udl_cmd_insert_int_4(struct udl_softc *sc, uint32_t value)
{
	uint32_t lvalue;
	struct udl_cmd_buf *cb = &sc->sc_cmd_buf;

	udl_cmd_insert_check(cb, 4);

	lvalue = htobe32(value);
	bcopy(&lvalue, cb->buf + cb->off, 4);

	cb->off += 4;
}

void
udl_cmd_insert_buf(struct udl_softc *sc, uint8_t *buf, uint32_t len)
{
	struct udl_cmd_buf *cb = &sc->sc_cmd_buf;

	udl_cmd_insert_check(cb, len);

	bcopy(buf, cb->buf + cb->off, len);

	cb->off += len;
}

void
udl_cmd_insert_check(struct udl_cmd_buf *cb, int len)
{
	int total;

	total = cb->off + len;

	if (total >=  UDL_CMD_MAX_XFER_SIZE) {
		/* XXX */
		panic("udl_cmd_insert_check: command buffer is full");
	}
}

void
udl_cmd_write_reg_1(struct udl_softc *sc, uint8_t reg, uint8_t val)
{
	udl_cmd_insert_int_1(sc, UDL_BULK_SOC);
	udl_cmd_insert_int_1(sc, UDL_BULK_CMD_REG_WRITE_1);
	udl_cmd_insert_int_1(sc, reg);
	udl_cmd_insert_int_1(sc, val);
}

void
udl_cmd_write_reg_3(struct udl_softc *sc, uint8_t reg, uint32_t val)
{
	udl_cmd_write_reg_1(sc, reg + 0, (val >> 16) & 0xff);
	udl_cmd_write_reg_1(sc, reg + 1, (val >> 8) & 0xff);
	udl_cmd_write_reg_1(sc, reg + 2, (val >> 0) & 0xff);
}

usbd_status
udl_cmd_send(struct udl_softc *sc)
{
	struct udl_cmd_buf *cb = &sc->sc_cmd_buf;
	struct udl_cmd_xfer *cx = &sc->sc_cmd_xfer[0];
	int len;
	usbd_status error;

	/* mark end of command stack */
	udl_cmd_insert_int_1(sc, UDL_BULK_SOC);
	udl_cmd_insert_int_1(sc, UDL_BULK_CMD_EOC);

	bcopy(cb->buf, cx->buf, cb->off);

	len = cb->off;
	error = usbd_bulk_transfer(cx->xfer, sc->sc_tx_pipeh,
	    USBD_NO_COPY | USBD_SHORT_XFER_OK, 1000, cx->buf, &len,
	    "udl_bulk_xmit");
	if (error != USBD_NORMAL_COMPLETION) {
		printf("%s: %s: %s!\n", DN(sc), FUNC, usbd_errstr(error));
		/* we clear our buffer now to avoid growing out of bounds */
		goto fail;
	}
	DPRINTF(1, "%s: %s: sent %d of %d bytes\n",
	    DN(sc), FUNC, len, cb->off);
fail:
	cb->off = 0;

	return (error);
}

usbd_status
udl_cmd_send_async(struct udl_softc *sc)
{
	struct udl_cmd_buf *cb = &sc->sc_cmd_buf;
	struct udl_cmd_xfer *cx;
	usbd_status error;
	int i, s;

	/* if the ring buffer is full, wait until it's flushed completely */
	if (sc->sc_cmd_xfer_cnt == UDL_CMD_XFER_COUNT) {
		DPRINTF(2, "%s: %s: ring buffer full, wait until flushed\n",
		    DN(sc), FUNC);
		/*
		 * XXX
		 * Yes, this is ugly.  But since we can't tsleep() here, I
		 * have no better idea how we can delay rasops so it doesn't
		 * blow up our command buffer.
		 */
		while (sc->sc_cmd_xfer_cnt > 0)
			delay(100);
	}

	s = splusb();	/* no callbacks please until accounting is done */

	/* find a free ring buffer */
	for (i = 0; i < UDL_CMD_XFER_COUNT; i++) {
		if (sc->sc_cmd_xfer[i].busy == 0)
			break;
	}
	if (i == UDL_CMD_XFER_COUNT) {
		/* XXX this shouldn't happen */
		panic("udl_cmd_send_async: buffer full");
	}
	cx = &sc->sc_cmd_xfer[i];

	/* mark end of command stack */
	udl_cmd_insert_int_1(sc, UDL_BULK_SOC);
	udl_cmd_insert_int_1(sc, UDL_BULK_CMD_EOC);

	/* copy command buffer to xfer buffer */
	bcopy(cb->buf, cx->buf, cb->off);

	/* do xfer */
	usbd_setup_xfer(cx->xfer, sc->sc_tx_pipeh, cx, cx->buf, cb->off,
	     USBD_NO_COPY, 1000, udl_cmd_send_async_cb);
	error = usbd_transfer(cx->xfer);
	if (error != 0 && error != USBD_IN_PROGRESS) {
		printf("%s: %s: %s!\n", DN(sc), FUNC, usbd_errstr(error));
		return (error);
	}
	DPRINTF(2, "%s: %s: sending %d bytes from buffer no. %d\n",
	    DN(sc), FUNC, cb->off, i);

	/* free command buffer, lock xfer buffer */
	cb->off = 0;
	cx->busy = 1;
	sc->sc_cmd_xfer_cnt++;

	splx(s);

	return (USBD_NORMAL_COMPLETION);
}

void
udl_cmd_send_async_cb(usbd_xfer_handle xfer, usbd_private_handle priv,
    usbd_status status)
{
	struct udl_cmd_xfer *cx = priv;
	struct udl_softc *sc = cx->sc;
	int len;

	if (status != USBD_NORMAL_COMPLETION) {
		printf("%s: %s: %s!\n", DN(sc), FUNC, usbd_errstr(status));

		if (status == USBD_NOT_STARTED || status == USBD_CANCELLED)
			return;
		if (status == USBD_STALLED)
			usbd_clear_endpoint_stall_async(sc->sc_tx_pipeh);
		goto skip;
	}
	usbd_get_xfer_status(xfer, NULL, NULL, &len, NULL);

	DPRINTF(2, "%s: %s: sent %d bytes\n", DN(sc), FUNC, len);
skip:
	/* free xfer buffer */
	cx->busy = 0;
	sc->sc_cmd_xfer_cnt--;
}

/* ---------- */

usbd_status
udl_init_chip(struct udl_softc *sc)
{
	uint8_t ui8;
	uint32_t ui32;
	int8_t edid[128];
	usbd_status error;

	error = udl_poll(sc, &ui32);
	if (error != USBD_NORMAL_COMPLETION)
		return (error);
	DPRINTF(1, "%s: %s: poll=0x%08x\n", DN(sc), FUNC, ui32);

	error = udl_read_1(sc, 0xc484, &ui8);
	if (error != USBD_NORMAL_COMPLETION)
		return (error);
	DPRINTF(1, "%s: %s: read 0x%02x from 0xc484\n", DN(sc), FUNC, ui8);

	error = udl_write_1(sc, 0xc41f, 0x01);
	if (error != USBD_NORMAL_COMPLETION)
		return (error);
	DPRINTF(1, "%s: %s: write 0x01 to 0xc41f\n", DN(sc), FUNC);

	error = udl_read_edid(sc, edid);
	if (error != USBD_NORMAL_COMPLETION)
		return (error);
	DPRINTF(1, "%s: %s: read EDID=\n", DN(sc), FUNC);
#ifdef UDL_DEBUG
	udl_hexdump(edid, sizeof(edid), 0);
#endif
	error = udl_set_enc_key(sc, udl_null_key_1, sizeof(udl_null_key_1));
	if (error != USBD_NORMAL_COMPLETION)
		return (error);
	DPRINTF(1, "%s: %s: set encryption key\n", DN(sc), FUNC);

	error = udl_write_1(sc, 0xc40b, 0x00);
	if (error != USBD_NORMAL_COMPLETION)
		return (error);
	DPRINTF(1, "%s: %s: write 0x00 to 0xc40b\n", DN(sc), FUNC, ui8);

	error = udl_set_decomp_table(sc, udl_decomp_table,
	    sizeof(udl_decomp_table));
	if (error != USBD_NORMAL_COMPLETION)
		return (error);
	DPRINTF(1, "%s: %s: set decompression table\n", DN(sc), FUNC);

	return (USBD_NORMAL_COMPLETION);
}

void
udl_init_fb_offsets(struct udl_softc *sc, uint32_t start16, uint32_t stride16,
    uint32_t start8, uint32_t stride8)
{
	udl_cmd_write_reg_1(sc, UDL_REG_SYNC, 0x00);
	udl_cmd_write_reg_3(sc, UDL_REG_ADDR_START16, start16);
	udl_cmd_write_reg_3(sc, UDL_REG_ADDR_STRIDE16, stride16);
	udl_cmd_write_reg_3(sc, UDL_REG_ADDR_START8, start8);
	udl_cmd_write_reg_3(sc, UDL_REG_ADDR_STRIDE8, stride8);
	udl_cmd_write_reg_1(sc, UDL_REG_SYNC, 0xff);
}

usbd_status
udl_init_resolution(struct udl_softc *sc, uint8_t *buf, uint8_t len)
{
	int i;
	usbd_status error;

	/* write resolution values and set video memory offsets */
	udl_cmd_write_reg_1(sc, UDL_REG_SYNC, 0x00);
	for (i = 0; i < len; i++)
		udl_cmd_write_reg_1(sc, i, buf[i]);
	udl_cmd_write_reg_1(sc, UDL_REG_SYNC, 0xff);

	udl_init_fb_offsets(sc, 0x000000, 0x000a00, 0x555555, 0x000500);
	error = udl_cmd_send(sc);
	if (error != USBD_NORMAL_COMPLETION)
		return (error);

	/* clear screen */
	udl_fb_block_write(sc, 0x0000, 0, 0, sc->sc_width, sc->sc_height);
	error = udl_cmd_send(sc);
	if (error != USBD_NORMAL_COMPLETION)
		return (error);

	/* show framebuffer content */
	udl_cmd_write_reg_1(sc, UDL_REG_SCREEN, UDL_REG_SCREEN_ON);
	udl_cmd_write_reg_1(sc, UDL_REG_SYNC, 0xff);
	error = udl_cmd_send(sc);
	if (error != USBD_NORMAL_COMPLETION)
		return (error);

	return (USBD_NORMAL_COMPLETION);
}

void
udl_fb_off_write(struct udl_softc *sc, uint16_t rgb16, uint32_t off,
    uint16_t width)
{
	uint8_t buf[UDL_CMD_MAX_DATA_SIZE];
	uint16_t lwidth, lrgb16;
	uint32_t loff;
	int i;

	loff = off * 2;
	lwidth = width * 2;

	udl_cmd_insert_int_1(sc, UDL_BULK_SOC);
	udl_cmd_insert_int_1(sc, UDL_BULK_CMD_FB_WRITE | UDL_BULK_CMD_FB_WORD);
	udl_cmd_insert_int_3(sc, loff);
	udl_cmd_insert_int_1(sc, width >= UDL_CMD_MAX_PIXEL_COUNT ? 0 : width);

	for (i = 0; i < lwidth; i += 2) {
		lrgb16 = htobe16(rgb16);
		bcopy(&lrgb16, buf + i, 2);
	}

	udl_cmd_insert_buf(sc, buf, lwidth);
}

void
udl_fb_line_write(struct udl_softc *sc, uint16_t rgb16, uint32_t x,
    uint32_t y, uint32_t width)
{
	uint32_t off, block;

	off = (y * sc->sc_width) + x;

	while (width) {
		if (width > UDL_CMD_MAX_PIXEL_COUNT)	
			block = UDL_CMD_MAX_PIXEL_COUNT;
		else
			block = width;

		udl_fb_off_write(sc, rgb16, off, block);

		off += block;
		width -= block;
	}
}

void
udl_fb_block_write(struct udl_softc *sc, uint16_t rgb16, uint32_t x,
    uint32_t y, uint32_t width, uint32_t height)
{
	uint32_t i;

	for (i = 0; i < height; i++)
		udl_fb_line_write(sc, rgb16, x, y + i, width);
}

void
udl_fb_buf_write(struct udl_softc *sc, uint8_t *buf, uint32_t x,
    uint32_t y, uint16_t width)
{
	uint16_t lwidth;
	uint32_t off;

	off = ((y * sc->sc_width) + x) * 2;
	lwidth = width * 2;

	udl_cmd_insert_int_1(sc, UDL_BULK_SOC);
	udl_cmd_insert_int_1(sc, UDL_BULK_CMD_FB_WRITE | UDL_BULK_CMD_FB_WORD);
	udl_cmd_insert_int_3(sc, off);
	udl_cmd_insert_int_1(sc, width >= UDL_CMD_MAX_PIXEL_COUNT ? 0 : width);

	udl_cmd_insert_buf(sc, buf, lwidth);
}

void
udl_fb_off_copy(struct udl_softc *sc, uint32_t src_off, uint32_t dst_off,
    uint16_t width)
{
	uint32_t ldst_off, lsrc_off;

	ldst_off = dst_off * 2;
	lsrc_off = src_off * 2;

	udl_cmd_insert_int_1(sc, UDL_BULK_SOC);
	udl_cmd_insert_int_1(sc, UDL_BULK_CMD_FB_COPY | UDL_BULK_CMD_FB_WORD);
	udl_cmd_insert_int_3(sc, ldst_off);
	udl_cmd_insert_int_1(sc, width >= UDL_CMD_MAX_PIXEL_COUNT ? 0 : width);
	udl_cmd_insert_int_3(sc, lsrc_off);
}

void
udl_fb_line_copy(struct udl_softc *sc, uint32_t src_x, uint32_t src_y,
    uint32_t dst_x, uint32_t dst_y, uint32_t width)
{
	uint32_t src_off, dst_off, block;

	src_off = (src_y * sc->sc_width) + src_x;
	dst_off = (dst_y * sc->sc_width) + dst_x;

	while (width) {
		if (width > UDL_CMD_MAX_PIXEL_COUNT)
			block = UDL_CMD_MAX_PIXEL_COUNT;
		else
			block = width;

		udl_fb_off_copy(sc, src_off, dst_off, block);

		src_off += block;
		dst_off += block;
		width -= block;
	}
}

void
udl_fb_block_copy(struct udl_softc *sc, uint32_t src_x, uint32_t src_y,
    uint32_t dst_x, uint32_t dst_y, uint32_t width, uint32_t height)
{
	int i;

	for (i = 0; i < height; i++)
		udl_fb_line_copy(sc, src_x, src_y + i, dst_x, dst_y + i, width);
}

void
udl_draw_char(struct udl_softc *sc, uint16_t fg, uint16_t bg, u_int uc,
    uint32_t x, uint32_t y)
{
	int i, j, ly;
	uint8_t *fontchar, fontbits, luc;
	uint8_t buf[UDL_CMD_MAX_DATA_SIZE];
	uint16_t *line, lrgb16;
	struct wsdisplay_font *font = sc->sc_ri.ri_font;

	fontchar = (uint8_t *)(font->data + (uc - font->firstchar) *
	    sc->sc_ri.ri_fontscale);

	ly = y;
	for (i = 0; i < font->fontheight; i++) {
		fontbits = *fontchar;
		line = (uint16_t *)buf;

		for (j = (font->fontwidth - 1); j != -1; j--) {
			luc = 1 << j;
			if (fontbits & luc)
				lrgb16 = htobe16(fg);
			else
				lrgb16 = htobe16(bg);
			bcopy(&lrgb16, line, 2);
			line++;
		}
		udl_fb_buf_write(sc, buf, x, ly, font->fontwidth);
		ly++;

		fontchar += font->stride;
	}
}

/* ---------- */
#ifdef UDL_DEBUG
void
udl_hexdump(void *buf, int len, int quiet)
{
	int i;

	for (i = 0; i < len; i++) {
		if (quiet == 0) {
			if (i % 16 == 0)
				printf("%s%5i:", i ? "\n" : "", i);
			if (i % 4 == 0)
				printf(" ");
		}
		printf("%02x", (int)*((u_char *)buf + i));
	}
	printf("\n");
}

usbd_status
udl_init_test(struct udl_softc *sc)
{
	int i, j, parts, loops;
	uint16_t color;
	uint16_t rgb24[3] = { 0xf800, 0x07e0, 0x001f };

	loops = (sc->sc_width * sc->sc_height) / UDL_CMD_MAX_PIXEL_COUNT;
	parts = loops / 3;
	color = rgb24[0];

	j = 1;
	for (i = 0; i < loops; i++) {
		if (i == parts) {
			color = rgb24[j];
			parts += parts;
			j++;
		}
		udl_fb_off_write(sc, color, i * UDL_CMD_MAX_PIXEL_COUNT,
		    UDL_CMD_MAX_PIXEL_COUNT);
	}
	(void)udl_cmd_send(sc);

	return (USBD_NORMAL_COMPLETION);
}
#endif