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
|
/*
* Copyright 2004-2007 Freescale Semiconductor, Inc. All Rights Reserved.
*/
/*
* The code contained herein is licensed under the GNU General Public
* License. You may obtain a copy of the GNU General Public License
* Version 2 or later at the following locations:
*
* http://www.opensource.org/licenses/gpl-license.html
* http://www.gnu.org/copyleft/gpl.html
*/
/*!
* @defgroup Framebuffer_MX27 Framebuffer Driver for MX27.
*/
/*!
* @file mx2fb.c
*
* @brief Frame buffer driver for MX27 ADS.
*
* @ingroup Framebuffer_MX27
*/
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/slab.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/dma-mapping.h>
#include <linux/platform_device.h>
#include <linux/interrupt.h>
#include <linux/clk.h>
#include <asm/uaccess.h>
#include <asm/arch/mxcfb.h>
#include "mx2fb.h"
#define MX2FB_TYPE_BG 0
#define MX2FB_TYPE_GW 1
extern void gpio_lcdc_active(void);
extern void gpio_lcdc_inactive(void);
extern void board_power_lcd(int on);
static char *fb_mode = 0;
static int fb_enabled = 0;
static unsigned long default_bpp = 16;
static unsigned char brightness = 255;
static ATOMIC_NOTIFIER_HEAD(mx2fb_notifier_list);
static struct clk *lcdc_clk;
/*!
* @brief Structure containing the MX2 specific framebuffer information.
*/
struct mx2fb_info {
int type;
char *id;
int registered;
int blank;
unsigned long pseudo_palette[16];
};
/* Framebuffer APIs */
static int mx2fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info);
static int mx2fb_set_par(struct fb_info *info);
static int mx2fb_setcolreg(unsigned regno, unsigned red, unsigned green,
unsigned blue, unsigned transp,
struct fb_info *info);
static int mx2fb_pan_display(struct fb_var_screeninfo *var,
struct fb_info *info);
static int mx2fb_blank(int blank_mode, struct fb_info *info);
static int mx2fb_ioctl(struct fb_info *info, unsigned int cmd,
unsigned long arg);
/* Driver entries */
int __init mx2fb_init(void);
void __exit mx2fb_exit(void);
#ifndef MODULE
static int __init mx2fb_setup(char *);
#endif
/* Internal functions */
static int __init _init_fbinfo(struct fb_info *info,
struct platform_device *pdev);
static int __init _install_fb(struct fb_info *info,
struct platform_device *pdev);
static void __exit _uninstall_fb(struct fb_info *info);
static int _map_video_memory(struct fb_info *info);
static void _unmap_video_memory(struct fb_info *info);
static void _set_fix(struct fb_info *info);
static void _enable_lcdc(struct fb_info *info);
static void _disable_lcdc(struct fb_info *info);
static void _enable_graphic_window(struct fb_info *info);
static void _disable_graphic_window(struct fb_info *info);
static void _update_lcdc(struct fb_info *info);
static void _set_brightness(unsigned char level);
static void _request_irq(void);
static void _free_irq(void);
#ifdef CONFIG_PM
static int mx2fb_suspend(struct platform_device *pdev, pm_message_t state);
static int mx2fb_resume(struct platform_device *pdev);
#else
#define mx2fb_suspend 0
#define mx2fb_resume 0
#endif
static int mx2fb_probe(struct platform_device *pdev);
#ifdef CONFIG_FB_MXC_TVOUT
#include <linux/video_encoder.h>
/*
* FIXME: VGA mode is not defined by video_encoder.h
* while FS453 supports VGA output.
*/
#ifndef VIDEO_ENCODER_VGA
#define VIDEO_ENCODER_VGA 32
#endif
#define MODE_PAL "TV-PAL"
#define MODE_NTSC "TV-NTSC"
#define MODE_VGA "TV-VGA"
extern int fs453_ioctl(unsigned int cmd, void *arg);
#endif
struct mx2fb_info mx2fbi_bg = {
.type = MX2FB_TYPE_BG,
.id = "DISP0 BG",
.registered = 0,
};
static struct mx2fb_info mx2fbi_gw = {
.type = MX2FB_TYPE_GW,
.id = "DISP0 FG",
.registered = 0,
};
/*! Current graphic window information */
static struct fb_gwinfo g_gwinfo = {
.enabled = 0,
.alpha_value = 255,
.ck_enabled = 0,
.ck_red = 0,
.ck_green = 0,
.ck_blue = 0,
.xpos = 0,
.ypos = 0,
};
/*!
* @brief Framebuffer information structures.
* There are up to 3 framebuffers: background, TVout, and graphic window.
* If graphic window is configured, it must be the last framebuffer.
*/
static struct fb_info mx2fb_info[] = {
{.par = &mx2fbi_bg},
{.par = &mx2fbi_gw},
};
/*!
* @brief This structure contains pointers to the power management
* callback functions.
*/
static struct platform_driver mx2fb_driver = {
.driver = {
.name = "mxc_sdc_fb",
.owner = THIS_MODULE,
.bus = &platform_bus_type,
},
.probe = mx2fb_probe,
.suspend = mx2fb_suspend,
.resume = mx2fb_resume,
};
/*!
* @brief Framebuffer file operations
*/
static struct fb_ops mx2fb_ops = {
.owner = THIS_MODULE,
.fb_check_var = mx2fb_check_var,
.fb_set_par = mx2fb_set_par,
.fb_setcolreg = mx2fb_setcolreg,
.fb_blank = mx2fb_blank,
.fb_pan_display = mx2fb_pan_display,
.fb_fillrect = cfb_fillrect,
.fb_copyarea = cfb_copyarea,
.fb_imageblit = cfb_imageblit,
//.fb_cursor = soft_cursor,
.fb_ioctl = mx2fb_ioctl,
};
/*!
* @brief Validates a var passed in.
*
* @param var Frame buffer variable screen structure
* @param info Frame buffer structure that represents a single frame buffer
*
* @return Negative errno on error, or zero on success.
*
* Checks to see if the hardware supports the state requested by var passed
* in. This function does not alter the hardware state! If the var passed in
* is slightly off by what the hardware can support then we alter the var
* PASSED in to what we can do. If the hardware doesn't support mode change
* a -EINVAL will be returned by the upper layers.
*
*/
static int mx2fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
{
unsigned long htotal, vtotal;
if (var->xres_virtual < var->xres)
var->xres_virtual = var->xres;
if (var->yres_virtual < var->yres)
var->yres_virtual = var->yres;
if (var->xoffset < 0)
var->xoffset = 0;
if (var->yoffset < 0)
var->yoffset = 0;
if (var->xoffset + info->var.xres > info->var.xres_virtual)
var->xoffset = info->var.xres_virtual - info->var.xres;
if (var->yoffset + info->var.yres > info->var.yres_virtual)
var->yoffset = info->var.yres_virtual - info->var.yres;
if ((var->bits_per_pixel != 32) && (var->bits_per_pixel != 24) &&
(var->bits_per_pixel != 16)) {
var->bits_per_pixel = default_bpp;
}
switch (var->bits_per_pixel) {
case 16:
var->red.length = 5;
var->red.offset = 11;
var->red.msb_right = 0;
var->green.length = 6;
var->green.offset = 5;
var->green.msb_right = 0;
var->blue.length = 5;
var->blue.offset = 0;
var->blue.msb_right = 0;
var->transp.length = 0;
var->transp.offset = 0;
var->transp.msb_right = 0;
break;
case 24:
var->red.length = 8;
var->red.offset = 16;
var->red.msb_right = 0;
var->green.length = 8;
var->green.offset = 8;
var->green.msb_right = 0;
var->blue.length = 8;
var->blue.offset = 0;
var->blue.msb_right = 0;
var->transp.length = 0;
var->transp.offset = 0;
var->transp.msb_right = 0;
break;
case 32:
var->red.length = 8;
var->red.offset = 16;
var->red.msb_right = 0;
var->green.length = 8;
var->green.offset = 8;
var->green.msb_right = 0;
var->blue.length = 8;
var->blue.offset = 0;
var->blue.msb_right = 0;
var->transp.length = 8;
var->transp.offset = 24;
var->transp.msb_right = 0;
break;
}
if (var->pixclock < 1000) {
htotal = var->xres + var->right_margin + var->hsync_len +
var->left_margin;
vtotal = var->yres + var->lower_margin + var->vsync_len +
var->upper_margin;
var->pixclock = (vtotal * htotal * 6UL) / 100UL;
var->pixclock = KHZ2PICOS(var->pixclock);
dev_dbg(info->device,
"pixclock set for 60Hz refresh = %u ps\n",
var->pixclock);
}
var->height = -1;
var->width = -1;
var->grayscale = 0;
/* Copy nonstd field to/from sync for fbset usage */
var->sync |= var->nonstd;
var->nonstd |= var->sync;
return 0;
}
/*!
* @brief Alters the hardware state.
*
* @param info Frame buffer structure that represents a single frame buffer
*
* @return Zero on success others on failure
*
* Using the fb_var_screeninfo in fb_info we set the resolution of this
* particular framebuffer. This function alters the fb_fix_screeninfo stored
* in fb_info. It doesn't not alter var in fb_info since we are using that
* data. This means we depend on the data in var inside fb_info to be
* supported by the hardware. mx2fb_check_var is always called before
* mx2fb_set_par to ensure this.
*/
static int mx2fb_set_par(struct fb_info *info)
{
unsigned long len;
struct mx2fb_info *mx2fbi = (struct mx2fb_info *)info->par;
_set_fix(info);
len = info->var.yres_virtual * info->fix.line_length;
if (len > info->fix.smem_len) {
if (info->fix.smem_start)
_unmap_video_memory(info);
/* Memory allocation for framebuffer */
if (_map_video_memory(info)) {
dev_err(info->device, "Unable to allocate fb memory\n");
return -ENOMEM;
}
}
_update_lcdc(info);
if (info->fbops->fb_blank)
info->fbops->fb_blank(mx2fbi->blank, info);
return 0;
}
/*!
* @brief Sets a color register.
*
* @param regno Which register in the CLUT we are programming
* @param red The red value which can be up to 16 bits wide
* @param green The green value which can be up to 16 bits wide
* @param blue The blue value which can be up to 16 bits wide.
* @param transp If supported the alpha value which can be up to
* 16 bits wide.
* @param info Frame buffer info structure
*
* @return Negative errno on error, or zero on success.
*
* Set a single color register. The values supplied have a 16 bit magnitude
* which needs to be scaled in this function for the hardware. Things to take
* into consideration are how many color registers, if any, are supported with
* the current color visual. With truecolor mode no color palettes are
* supported. Here a psuedo palette is created which we store the value in
* pseudo_palette in struct fb_info. For pseudocolor mode we have a limited
* color palette.
*/
static int mx2fb_setcolreg(unsigned regno, unsigned red, unsigned green,
unsigned blue, unsigned transp, struct fb_info *info)
{
int ret = 1;
/*
* If greyscale is true, then we convert the RGB value
* to greyscale no matter what visual we are using.
*/
if (info->var.grayscale)
red = green = blue = (19595 * red + 38470 * green +
7471 * blue) >> 16;
switch (info->fix.visual) {
case FB_VISUAL_TRUECOLOR:
/*
* 16-bit True Colour. We encode the RGB value
* according to the RGB bitfield information.
*/
if (regno < 16) {
u32 *pal = info->pseudo_palette;
u32 v;
#define CNVT_TOHW(val,width) ((((val)<<(width))+0x7FFF-(val))>>16)
red = CNVT_TOHW(red, info->var.red.length);
green = CNVT_TOHW(green, info->var.green.length);
blue = CNVT_TOHW(blue, info->var.blue.length);
transp = CNVT_TOHW(transp, info->var.transp.length);
#undef CNVT_TOHW
v = (red << info->var.red.offset) |
(green << info->var.green.offset) |
(blue << info->var.blue.offset) |
(transp << info->var.transp.offset);
pal[regno] = v;
ret = 0;
}
break;
case FB_VISUAL_STATIC_PSEUDOCOLOR:
case FB_VISUAL_PSEUDOCOLOR:
break;
}
return ret;
}
/*!
* @brief Pans the display.
*
* @param var Frame buffer variable screen structure
* @param info Frame buffer structure that represents a single frame buffer
*
* @return Negative errno on error, or zero on success.
*
* Pan (or wrap, depending on the `vmode' field) the display using the
* 'xoffset' and 'yoffset' fields of the 'var' structure. If the values
* don't fit, return -EINVAL.
*/
static int mx2fb_pan_display(struct fb_var_screeninfo *var,
struct fb_info *info)
{
if ((info->var.xoffset == var->xoffset) &&
(info->var.yoffset == var->yoffset)) {
return 0; /* No change, do nothing */
}
if (var->xoffset < 0 || var->yoffset < 0
|| var->xoffset + info->var.xres > info->var.xres_virtual
|| var->yoffset + info->var.yres > info->var.yres_virtual)
return -EINVAL;
info->var.xoffset = var->xoffset;
info->var.yoffset = var->yoffset;
_update_lcdc(info);
if (var->vmode & FB_VMODE_YWRAP) {
info->var.vmode |= FB_VMODE_YWRAP;
} else {
info->var.vmode &= ~FB_VMODE_YWRAP;
}
return 0;
}
/*!
* @brief Blanks the display.
*
* @param blank_mode The blank mode we want.
* @param info Frame buffer structure that represents a single frame buffer
*
* @return Negative errno on error, or zero on success.
*
* Blank the screen if blank_mode != 0, else unblank. Return 0 if blanking
* succeeded, != 0 if un-/blanking failed.
* blank_mode == 2: suspend vsync
* blank_mode == 3: suspend hsync
* blank_mode == 4: powerdown
*/
static int mx2fb_blank(int blank_mode, struct fb_info *info)
{
struct mx2fb_info *mx2fbi = (struct mx2fb_info *)info->par;
dev_dbg(info->device, "blank mode = %d\n", blank_mode);
mx2fbi->blank = blank_mode;
switch (blank_mode) {
case FB_BLANK_POWERDOWN:
case FB_BLANK_VSYNC_SUSPEND:
case FB_BLANK_HSYNC_SUSPEND:
case FB_BLANK_NORMAL:
_disable_lcdc(info);
break;
case FB_BLANK_UNBLANK:
_enable_lcdc(info);
break;
}
return 0;
}
/*!
* @brief Ioctl function to support customized ioctl operations.
*
* @param info Framebuffer structure that represents a single frame buffer
* @param cmd The command number
* @param arg Argument which depends on cmd
*
* @return Negative errno on error, or zero on success.
*/
static int mx2fb_ioctl(struct fb_info *info, unsigned int cmd,
unsigned long arg)
{
struct mx2fb_info *mx2fbi = (struct mx2fb_info *)info->par;
struct mx2fb_gbl_alpha ga;
struct mx2fb_color_key ck;
unsigned char level;
switch (cmd) {
case MX2FB_SET_GBL_ALPHA:
if (mx2fbi->type != MX2FB_TYPE_GW)
return -ENODEV;
if (!arg)
return -EINVAL;
/* set graphic window information */
if (copy_from_user((void *)&ga, (void *)arg, sizeof(ga)))
return -EFAULT;
g_gwinfo.alpha_value = ga.alpha;
if (g_gwinfo.enabled)
_enable_graphic_window(info);
else
_disable_graphic_window(info);
break;
case MX2FB_SET_CLR_KEY:
if (mx2fbi->type != MX2FB_TYPE_GW)
return -ENODEV;
if (!arg)
return -EINVAL;
/* set graphic window information */
if (copy_from_user((void *)&ck, (void *)arg, sizeof(ck)))
return -EFAULT;
g_gwinfo.ck_enabled = ck.enable;
g_gwinfo.ck_red = (ck.color_key & 0x003F0000) >> 16;
g_gwinfo.ck_green = (ck.color_key & 0x00003F00) >> 8;
g_gwinfo.ck_blue = ck.color_key & 0x0000003F;
if (g_gwinfo.enabled)
_enable_graphic_window(info);
else
_disable_graphic_window(info);
break;
case MX2FB_SET_BRIGHTNESS:
if (copy_from_user((void *)&level, (void *)arg, sizeof(level)))
return -EFAULT;
brightness = level;
_set_brightness(level);
break;
case FBIOGET_GWINFO:
if (mx2fbi->type != MX2FB_TYPE_GW)
return -ENODEV;
if (!arg)
return -EINVAL;
/* get graphic window information */
if (copy_to_user((void *)arg, (void *)&g_gwinfo,
sizeof(g_gwinfo)))
return -EFAULT;
break;
case FBIOPUT_GWINFO:
if (mx2fbi->type != MX2FB_TYPE_GW)
return -ENODEV;
if (!arg)
return -EINVAL;
/* set graphic window information */
if (copy_from_user((void *)&g_gwinfo, (void *)arg,
sizeof(g_gwinfo)))
return -EFAULT;
if (g_gwinfo.enabled)
_enable_graphic_window(info);
else
_disable_graphic_window(info);
break;
#ifdef CONFIG_FB_MXC_TVOUT
case ENCODER_GET_CAPABILITIES:{
int ret;
struct video_encoder_capability cap;
if (mx2fbi->type != MX2FB_TYPE_BG)
return -ENODEV;
ret = fs453_ioctl(cmd, &cap);
if (ret)
return ret;
if (copy_to_user((void *)arg, &cap, sizeof(cap)))
return -EFAULT;
break;
}
case ENCODER_SET_NORM:{
int ret;
unsigned long mode;
char *smode;
struct fb_var_screeninfo var;
if (mx2fbi->type != MX2FB_TYPE_BG)
return -ENODEV;
if (copy_from_user(&mode, (void *)arg, sizeof(mode)))
return -EFAULT;
if ((ret = fs453_ioctl(cmd, &mode)))
return ret;
if (mode == VIDEO_ENCODER_PAL)
smode = MODE_PAL;
else if (mode == VIDEO_ENCODER_NTSC)
smode = MODE_NTSC;
else
smode = MODE_VGA;
var = info->var;
var.nonstd = 0;
ret = fb_find_mode(&var, info, smode, mxcfb_modedb,
mxcfb_modedb_sz, NULL, default_bpp);
if ((ret != 1) && (ret != 2)) /* specified mode not found */
return -ENODEV;
info->var = var;
fb_mode = smode;
return mx2fb_set_par(info);
}
case ENCODER_SET_INPUT:
case ENCODER_SET_OUTPUT:
case ENCODER_ENABLE_OUTPUT:{
unsigned long varg;
if (mx2fbi->type != MX2FB_TYPE_BG)
return -ENODEV;
if (copy_from_user(&varg, (void *)arg, sizeof(varg)))
return -EFAULT;
return fs453_ioctl(cmd, &varg);
}
#endif
default:
dev_dbg(info->device, "Unknown ioctl command (0x%08X)\n", cmd);
return -EINVAL;
}
return 0;
}
/*!
* @brief Set fixed framebuffer parameters based on variable settings.
*
* @param info framebuffer information pointer
* @return Negative errno on error, or zero on success.
*/
static void _set_fix(struct fb_info *info)
{
struct fb_fix_screeninfo *fix = &info->fix;
struct fb_var_screeninfo *var = &info->var;
struct mx2fb_info *mx2fbi = (struct mx2fb_info *)info->par;
strncpy(fix->id, mx2fbi->id, strlen(mx2fbi->id));
fix->line_length = var->xres_virtual * var->bits_per_pixel / 8;
fix->type = FB_TYPE_PACKED_PIXELS;
fix->accel = FB_ACCEL_NONE;
fix->visual = FB_VISUAL_TRUECOLOR;
fix->xpanstep = 1;
fix->ypanstep = 1;
}
/*!
* @brief Initialize framebuffer information structure.
*
* @param info framebuffer information pointer
* @param pdev pointer to struct device
* @return Negative errno on error, or zero on success.
*/
static int __init _init_fbinfo(struct fb_info *info,
struct platform_device *pdev)
{
struct mx2fb_info *mx2fbi = (struct mx2fb_info *)info->par;
info->device = &pdev->dev;
info->var.activate = FB_ACTIVATE_NOW;
info->fbops = &mx2fb_ops;
info->flags = FBINFO_FLAG_DEFAULT;
info->pseudo_palette = &mx2fbi->pseudo_palette;
/* Allocate colormap */
fb_alloc_cmap(&info->cmap, 16, 0);
return 0;
}
/*!
* @brief Install framebuffer into the system.
*
* @param info framebuffer information pointer
* @param pdev pointer to struct device
* @return Negative errno on error, or zero on success.
*/
static int __init _install_fb(struct fb_info *info,
struct platform_device *pdev)
{
struct mx2fb_info *mx2fbi = (struct mx2fb_info *)info->par;
if (_init_fbinfo(info, pdev))
return -EINVAL;
if (fb_mode == 0)
fb_mode = pdev->dev.platform_data;
if (!fb_find_mode(&info->var, info, fb_mode, mxcfb_modedb,
mxcfb_modedb_sz, NULL, default_bpp)) {
fb_dealloc_cmap(&info->cmap);
return -EBUSY;
}
/* Default Y virtual size is 2x panel size */
/* info->var.yres_virtual = info->var.yres << 1; */
if (mx2fbi->type == MX2FB_TYPE_GW)
mx2fbi->blank = FB_BLANK_NORMAL;
else
mx2fbi->blank = FB_BLANK_UNBLANK;
if (mx2fb_set_par(info)) {
fb_dealloc_cmap(&info->cmap);
return -EINVAL;
}
if (register_framebuffer(info) < 0) {
_unmap_video_memory(info);
fb_dealloc_cmap(&info->cmap);
return -EINVAL;
}
mx2fbi->registered = 1;
dev_info(info->device, "fb%d: %s fb device registered successfully.\n",
info->node, info->fix.id);
return 0;
}
/*!
* @brief Uninstall framebuffer from the system.
*
* @param info framebuffer information pointer
*/
static void __exit _uninstall_fb(struct fb_info *info)
{
struct mx2fb_info *mx2fbi = (struct mx2fb_info *)info->par;
if (!mx2fbi->registered)
return;
unregister_framebuffer(info);
_unmap_video_memory(info);
if (&info->cmap)
fb_dealloc_cmap(&info->cmap);
mx2fbi->registered = 0;
}
/*!
* @brief Allocate memory for framebuffer.
*
* @param info framebuffer information pointer
* @return Negative errno on error, or zero on success.
*/
static int _map_video_memory(struct fb_info *info)
{
info->fix.smem_len = info->fix.line_length * info->var.yres_virtual;
info->screen_base = dma_alloc_coherent(0,
info->fix.smem_len,
(dma_addr_t *) & info->fix.
smem_start,
GFP_DMA | GFP_KERNEL);
if (info->screen_base == 0) {
dev_err(info->device, "Unable to allocate fb memory\n");
return -EBUSY;
}
dev_dbg(info->device, "Allocated fb @ paddr=0x%08lX, size=%d.\n",
info->fix.smem_start, info->fix.smem_len);
info->screen_size = info->fix.smem_len;
/* Clear the screen */
memset((char *)info->screen_base, 0, info->fix.smem_len);
return 0;
}
/*!
* @brief Release memory for framebuffer.
* @param info framebuffer information pointer
*/
static void _unmap_video_memory(struct fb_info *info)
{
dma_free_coherent(0, info->fix.smem_len, info->screen_base,
(dma_addr_t) info->fix.smem_start);
info->screen_base = 0;
info->fix.smem_start = 0;
info->fix.smem_len = 0;
}
/*!
* @brief Enable LCD controller.
* @param info framebuffer information pointer
*/
static void _enable_lcdc(struct fb_info *info)
{
static int first_enable = 1;
struct mx2fb_info *mx2fbi = (struct mx2fb_info *)info->par;
/*
* Graphic window can only be enabled while the HCLK to the LCDC
* is disabled. Once enabled it can subsequently be disabled and
* enabled without turning off the HCLK.
* The graphic window is enabled and then disabled here. So next
* time to enable graphic window the HCLK to LCDC does not need
* to be disabled, and the flicker (due to disabling of HCLK to
* LCDC) is avoided.
*/
if (first_enable) {
_enable_graphic_window(info);
_disable_graphic_window(info);
first_enable = 0;
}
if (mx2fbi->type == MX2FB_TYPE_GW)
_enable_graphic_window(info);
else if (!fb_enabled) {
clk_enable(lcdc_clk);
gpio_lcdc_active();
board_power_lcd(1);
_set_brightness(brightness);
fb_enabled++;
#ifdef CONFIG_FB_MXC_TVOUT
if (fb_mode) {
unsigned long mode = 0;
if (strcmp(fb_mode, MODE_VGA) == 0)
mode = VIDEO_ENCODER_VGA;
else if (strcmp(fb_mode, MODE_NTSC) == 0)
mode = VIDEO_ENCODER_NTSC;
else if (strcmp(fb_mode, MODE_PAL) == 0)
mode = VIDEO_ENCODER_PAL;
if (mode)
fs453_ioctl(ENCODER_SET_NORM, &mode);
}
#endif
}
}
/*!
* @brief Disable LCD controller.
* @param info framebuffer information pointer
*/
static void _disable_lcdc(struct fb_info *info)
{
struct mx2fb_info *mx2fbi = (struct mx2fb_info *)info->par;
if (mx2fbi->type == MX2FB_TYPE_GW)
_disable_graphic_window(info);
else {
if (fb_enabled) {
gpio_lcdc_inactive();
board_power_lcd(0);
_set_brightness(0);
clk_disable(lcdc_clk);
fb_enabled = 0;
}
#ifdef CONFIG_FB_MXC_TVOUT
if (fb_mode) {
int enable = 0;
if ((strcmp(fb_mode, MODE_VGA) == 0)
|| (strcmp(fb_mode, MODE_NTSC) == 0)
|| (strcmp(fb_mode, MODE_PAL) == 0))
fs453_ioctl(ENCODER_ENABLE_OUTPUT, &enable);
}
#endif
}
}
/*!
* @brief Enable graphic window.
* @param info framebuffer information pointer
*/
static void _enable_graphic_window(struct fb_info *info)
{
struct fb_var_screeninfo *var = &info->var;
g_gwinfo.enabled = 1;
g_gwinfo.base = (var->yoffset * var->xres_virtual + var->xoffset);
g_gwinfo.base *= (var->bits_per_pixel) / 8;
g_gwinfo.base += info->fix.smem_start;
g_gwinfo.xres = var->xres;
g_gwinfo.yres = var->yres;
g_gwinfo.xres_virtual = var->xres_virtual;
mx2_gw_set(&g_gwinfo);
}
/*!
* @brief Disable graphic window.
* @param info framebuffer information pointer
*/
static void _disable_graphic_window(struct fb_info *info)
{
unsigned long i = 0;
g_gwinfo.enabled = 0;
/*
* Set alpha value to zero and reduce gw size, otherwise the graphic
* window will not be able to be enabled again.
*/
__raw_writel(__raw_readl(LCDC_REG(LCDC_LGWCR)) & 0x00FFFFFF,
LCDC_REG(LCDC_LGWCR));
__raw_writel(((16 >> 4) << 20) + 16, LCDC_REG(LCDC_LGWSR));
while (i < 1000)
i++;
/* Now disable graphic window */
__raw_writel(__raw_readl(LCDC_REG(LCDC_LGWCR)) & ~0x00400000,
LCDC_REG(LCDC_LGWCR));
dev_dbg(info->device, "Graphic window disabled.\n");
}
/*!
* @brief Setup graphic window properties.
* @param gwinfo graphic window information pointer
*/
void mx2_gw_set(struct fb_gwinfo *gwinfo)
{
int width, height, xpos, ypos;
int width_bg, height_bg;
unsigned long lgwcr = 0x00400000; /* Graphic window control register */
if (!gwinfo->enabled) {
_disable_graphic_window(0);
return;
}
/* Graphic window start address register */
__raw_writel(gwinfo->base, LCDC_REG(LCDC_LGWSAR));
/*
* The graphic window width, height, x position and y position
* must be synced up width the background window, otherwise there
* may be flickering.
*/
width_bg = (__raw_readl(LCDC_REG(LCDC_LSR)) & 0x03F00000) >> 16;
height_bg = __raw_readl(LCDC_REG(LCDC_LSR)) & 0x000003FF;
width = (gwinfo->xres > width_bg) ? width_bg : gwinfo->xres;
height = (gwinfo->yres > height_bg) ? height_bg : gwinfo->yres;
xpos = gwinfo->xpos;
ypos = gwinfo->ypos;
if (xpos + width > width_bg)
xpos = width_bg - width;
if (ypos + height > height_bg)
ypos = height_bg - height;
/* Graphic window size register */
__raw_writel(((width >> 4) << 20) + height, LCDC_REG(LCDC_LGWSR));
/* Graphic window virtual page width register */
__raw_writel(gwinfo->xres_virtual >> 1, LCDC_REG(LCDC_LGWVPWR));
/* Graphic window position register */
__raw_writel(((xpos & 0x000003FF) << 16) | (ypos & 0x000003FF),
LCDC_REG(LCDC_LGWPR));
/* Graphic window panning offset register */
__raw_writel(0, LCDC_REG(LCDC_LGWPOR));
/* Graphic window DMA control register */
if (cpu_is_mx27_rev(CHIP_REV_2_0) > 0)
__raw_writel(0x00040060, LCDC_REG(LCDC_LGWDCR));
else
__raw_writel(0x00020010, LCDC_REG(LCDC_LGWDCR));
/* Graphic window control register */
lgwcr |= (gwinfo->alpha_value & 0x000000FF) << 24;
lgwcr |= gwinfo->ck_enabled ? 0x00800000 : 0;
lgwcr |= gwinfo->vs_reversed ? 0x00200000 : 0;
/*
* Color keying value
* Todo: assume always use RGB565
*/
lgwcr |= (gwinfo->ck_red & 0x0000003F) << 12;
lgwcr |= (gwinfo->ck_green & 0x0000003F) << 6;
lgwcr |= gwinfo->ck_blue & 0x0000003F;
__raw_writel(lgwcr, LCDC_REG(LCDC_LGWCR));
pr_debug("Graphic window enabled.\n");
}
/*!
* @brief Update LCDC registers
* @param info framebuffer information pointer
*/
static void _update_lcdc(struct fb_info *info)
{
unsigned long base;
unsigned long perclk3, pcd, pcr;
struct fb_var_screeninfo *var = &info->var;
struct mx2fb_info *mx2fbi = (struct mx2fb_info *)info->par;
if (mx2fbi->type == MX2FB_TYPE_GW) {
_enable_graphic_window(info);
return;
}
base = (var->yoffset * var->xres_virtual + var->xoffset);
base *= (var->bits_per_pixel) / 8;
base += info->fix.smem_start;
/* Screen start address register */
__raw_writel(base, LCDC_REG(LCDC_LSSAR));
/* Size register */
dev_dbg(info->device, "xres = %d, yres = %d\n",
info->var.xres, info->var.yres);
__raw_writel(((info->var.xres >> 4) << 20) + info->var.yres,
LCDC_REG(LCDC_LSR));
/* Virtual page width register */
__raw_writel(info->var.xres_virtual >> 1, LCDC_REG(LCDC_LVPWR));
/* To setup LCDC pixel clock */
perclk3 = clk_round_rate(lcdc_clk, 134000000);
if (clk_set_rate(lcdc_clk, perclk3)) {
printk(KERN_INFO "mx2fb: Unable to set clock to %lu\n",
perclk3);
perclk3 = clk_get_rate(lcdc_clk);
}
/* Calculate pixel clock divider, and round to the nearest integer */
pcd = (perclk3 * 8 / (PICOS2KHZ(var->pixclock) * 1000UL) + 4) / 8;
if (--pcd > 0x3F)
pcd = 0x3F;
/* Panel configuration register */
pcr = 0xFA008B80 | pcd;
pcr |= (var->sync & FB_SYNC_CLK_INVERT) ? 0x01000000 : 0;
pcr |= (var->sync & FB_SYNC_SHARP_MODE) ? 0x00000040 : 0;
pcr |= (var->sync & FB_SYNC_OE_ACT_HIGH) ? 0 : 0x00100000;
pcr |= (var->sync & FB_SYNC_FLM_ACT_LOW) ? 0x00800000 : 0;
pcr |= (var->sync & FB_SYNC_LP_ACT_LOW) ? 0x00400000 : 0;
pcr |= (var->sync & FB_SYNC_CLK_POS_EDGE) ? 0x00200000 : 0;
__raw_writel(pcr, LCDC_REG(LCDC_LPCR));
/* Horizontal and vertical configuration register */
__raw_writel(((var->hsync_len - 1) << 26)
+ ((var->right_margin - 1) << 8)
+ (var->left_margin - 3), LCDC_REG(LCDC_LHCR));
__raw_writel((var->vsync_len << 26)
+ (var->lower_margin << 8)
+ var->upper_margin, LCDC_REG(LCDC_LVCR));
/* Sharp configuration register */
__raw_writel(0x00120300, LCDC_REG(LCDC_LSCR));
/* Refresh mode control reigster */
__raw_writel(0x00000000, LCDC_REG(LCDC_LRMCR));
/* DMA control register */
if (cpu_is_mx27_rev(CHIP_REV_2_0) > 0)
__raw_writel(0x00040060, LCDC_REG(LCDC_LDCR));
else
__raw_writel(0x00020010, LCDC_REG(LCDC_LDCR));
/* PWM contrast control register */
_set_brightness(brightness);
}
/*!
* @brief Set LCD brightness
* @param level brightness level
*/
static void _set_brightness(unsigned char level)
{
/* Set LCDC PWM contract control register */
__raw_writel(0x00A90300 | level, LCDC_REG(LCDC_LPCCR));
}
/*
* @brief LCDC interrupt handler
*/
static irqreturn_t mx2fb_isr(int irq, void *dev_id)
{
struct fb_event event;
unsigned long status = __raw_readl(LCDC_REG(LCDC_LISR));
if (status & MX2FB_INT_EOF) {
event.info = &mx2fb_info[0];
atomic_notifier_call_chain(&mx2fb_notifier_list,
FB_EVENT_MXC_EOF, &event);
}
if (status & MX2FB_INT_GW_EOF) {
event.info = &mx2fb_info[1];
atomic_notifier_call_chain(&mx2fb_notifier_list,
FB_EVENT_MXC_EOF, &event);
}
return IRQ_HANDLED;
}
/*!
* @brief Config and request LCDC interrupt
*/
static void _request_irq(void)
{
unsigned long status;
unsigned long flags;
/* Read to clear the status */
status = __raw_readl(LCDC_REG(LCDC_LISR));
if (request_irq(INT_LCDC, mx2fb_isr, 0, "LCDC", 0))
pr_info("Request LCDC IRQ failed.\n");
else {
spin_lock_irqsave(&mx2fb_notifier_list.lock, flags);
/* Enable interrupt in case client has registered */
if (mx2fb_notifier_list.head != NULL) {
unsigned long status;
unsigned long ints = MX2FB_INT_EOF;
ints |= MX2FB_INT_GW_EOF;
/* Read to clear the status */
status = __raw_readl(LCDC_REG(LCDC_LISR));
/* Configure interrupt condition for EOF */
__raw_writel(0x0, LCDC_REG(LCDC_LICR));
/* Enable EOF and graphic window EOF interrupt */
__raw_writel(ints, LCDC_REG(LCDC_LIER));
}
spin_unlock_irqrestore(&mx2fb_notifier_list.lock, flags);
}
}
/*!
* @brief Free LCDC interrupt handler
*/
static void _free_irq(void)
{
/* Disable all LCDC interrupt */
__raw_writel(0x0, LCDC_REG(LCDC_LIER));
free_irq(INT_LCDC, 0);
}
/*!
* @brief Register a client notifier
* @param nb notifier block to callback on events
*/
int mx2fb_register_client(struct notifier_block *nb)
{
unsigned long flags;
int ret;
ret = atomic_notifier_chain_register(&mx2fb_notifier_list, nb);
spin_lock_irqsave(&mx2fb_notifier_list.lock, flags);
/* Enable interrupt in case client has registered */
if (mx2fb_notifier_list.head != NULL) {
unsigned long status;
unsigned long ints = MX2FB_INT_EOF;
ints |= MX2FB_INT_GW_EOF;
/* Read to clear the status */
status = __raw_readl(LCDC_REG(LCDC_LISR));
/* Configure interrupt condition for EOF */
__raw_writel(0x0, LCDC_REG(LCDC_LICR));
/* Enable EOF and graphic window EOF interrupt */
__raw_writel(ints, LCDC_REG(LCDC_LIER));
}
spin_unlock_irqrestore(&mx2fb_notifier_list.lock, flags);
return ret;
}
/*!
* @brief Unregister a client notifier
* @param nb notifier block to callback on events
*/
int mx2fb_unregister_client(struct notifier_block *nb)
{
unsigned long flags;
int ret;
ret = atomic_notifier_chain_unregister(&mx2fb_notifier_list, nb);
spin_lock_irqsave(&mx2fb_notifier_list.lock, flags);
/* Mask interrupt in case no client registered */
if (mx2fb_notifier_list.head == NULL)
__raw_writel(0x0, LCDC_REG(LCDC_LIER));
spin_unlock_irqrestore(&mx2fb_notifier_list.lock, flags);
return ret;
}
#ifdef CONFIG_PM
/*
* Power management hooks. Note that we won't be called from IRQ context,
* unlike the blank functions above, so we may sleep.
*/
/*!
* @brief Suspends the framebuffer and blanks the screen.
* Power management support
*/
static int mx2fb_suspend(struct platform_device *pdev, pm_message_t state)
{
_disable_lcdc(&mx2fb_info[0]);
return 0;
}
/*!
* @brief Resumes the framebuffer and unblanks the screen.
* Power management support
*/
static int mx2fb_resume(struct platform_device *pdev)
{
_enable_lcdc(&mx2fb_info[0]);
return 0;
}
#endif /* CONFIG_PM */
/*!
* @brief Probe routine for the framebuffer driver. It is called during the
* driver binding process.
*
* @return Appropriate error code to the kernel common code
*/
static int mx2fb_probe(struct platform_device *pdev)
{
int ret, i;
lcdc_clk = clk_get(&pdev->dev, "lcdc_clk");
for (i = 0; i < sizeof(mx2fb_info) / sizeof(struct fb_info); i++) {
if ((ret = _install_fb(&mx2fb_info[i], pdev))) {
dev_err(&pdev->dev,
"Failed to register framebuffer %d\n", i);
return ret;
}
}
_request_irq();
return 0;
}
/*!
* @brief Initialization
*/
int __init mx2fb_init(void)
{
/*
* For kernel boot options (in 'video=xxxfb:<options>' format)
*/
#ifndef MODULE
{
char *option;
if (fb_get_options("mxcfb", &option))
return -ENODEV;
mx2fb_setup(option);
}
#endif
return platform_driver_register(&mx2fb_driver);
}
/*!
* @brief Cleanup
*/
void __exit mx2fb_exit(void)
{
int i;
_free_irq();
for (i = sizeof(mx2fb_info) / sizeof(struct fb_info); i > 0; i--)
_uninstall_fb(&mx2fb_info[i - 1]);
platform_driver_unregister(&mx2fb_driver);
}
#ifndef MODULE
/*!
* @brief Setup
* Parse user specified options
* Example: video=mxcfb:240x320,bpp=16,Sharp-QVGA
*/
static int __init mx2fb_setup(char *options)
{
char *opt;
if (!options || !*options)
return 0;
while ((opt = strsep(&options, ",")) != NULL) {
if (!*opt)
continue;
if (!strncmp(opt, "bpp=", 4))
default_bpp = simple_strtoul(opt + 4, NULL, 0);
else
fb_mode = opt;
}
return 0;
}
#endif
/* Modularization */
module_init(mx2fb_init);
module_exit(mx2fb_exit);
EXPORT_SYMBOL(mx2_gw_set);
EXPORT_SYMBOL(mx2fb_register_client);
EXPORT_SYMBOL(mx2fb_unregister_client);
MODULE_AUTHOR("Freescale Semiconductor, Inc.");
MODULE_DESCRIPTION("MX2 framebuffer driver");
MODULE_LICENSE("GPL");
|