forked from torvalds/linux
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathpvr2fb.c
1142 lines (958 loc) · 31 KB
/
pvr2fb.c
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
/* drivers/video/pvr2fb.c
*
* Frame buffer and fbcon support for the NEC PowerVR2 found within the Sega
* Dreamcast.
*
* Copyright (c) 2001 M. R. Brown <[email protected]>
* Copyright (c) 2001, 2002, 2003, 2004, 2005 Paul Mundt <[email protected]>
*
* This file is part of the LinuxDC project (linuxdc.sourceforge.net).
*
*/
/*
* This driver is mostly based on the excellent amifb and vfb sources. It uses
* an odd scheme for converting hardware values to/from framebuffer values,
* here are some hacked-up formulas:
*
* The Dreamcast has screen offsets from each side of its four borders and
* the start offsets of the display window. I used these values to calculate
* 'pseudo' values (think of them as placeholders) for the fb video mode, so
* that when it came time to convert these values back into their hardware
* values, I could just add mode- specific offsets to get the correct mode
* settings:
*
* left_margin = diwstart_h - borderstart_h;
* right_margin = borderstop_h - (diwstart_h + xres);
* upper_margin = diwstart_v - borderstart_v;
* lower_margin = borderstop_v - (diwstart_h + yres);
*
* hsync_len = borderstart_h + (hsync_total - borderstop_h);
* vsync_len = borderstart_v + (vsync_total - borderstop_v);
*
* Then, when it's time to convert back to hardware settings, the only
* constants are the borderstart_* offsets, all other values are derived from
* the fb video mode:
*
* // PAL
* borderstart_h = 116;
* borderstart_v = 44;
* ...
* borderstop_h = borderstart_h + hsync_total - hsync_len;
* ...
* diwstart_v = borderstart_v - upper_margin;
*
* However, in the current implementation, the borderstart values haven't had
* the benefit of being fully researched, so some modes may be broken.
*/
#undef DEBUG
#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/slab.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/fb.h>
#include <linux/init.h>
#include <linux/pci.h>
#ifdef CONFIG_SH_DREAMCAST
#include <asm/machvec.h>
#include <asm/mach/sysasic.h>
#endif
#ifdef CONFIG_SH_DMA
#include <linux/pagemap.h>
#include <asm/mach/dma.h>
#include <asm/dma.h>
#endif
#ifdef CONFIG_SH_STORE_QUEUES
#include <asm/uaccess.h>
#include <asm/cpu/sq.h>
#endif
#ifndef PCI_DEVICE_ID_NEC_NEON250
# define PCI_DEVICE_ID_NEC_NEON250 0x0067
#endif
/* 2D video registers */
#define DISP_BASE par->mmio_base
#define DISP_BRDRCOLR (DISP_BASE + 0x40)
#define DISP_DIWMODE (DISP_BASE + 0x44)
#define DISP_DIWADDRL (DISP_BASE + 0x50)
#define DISP_DIWADDRS (DISP_BASE + 0x54)
#define DISP_DIWSIZE (DISP_BASE + 0x5c)
#define DISP_SYNCCONF (DISP_BASE + 0xd0)
#define DISP_BRDRHORZ (DISP_BASE + 0xd4)
#define DISP_SYNCSIZE (DISP_BASE + 0xd8)
#define DISP_BRDRVERT (DISP_BASE + 0xdc)
#define DISP_DIWCONF (DISP_BASE + 0xe8)
#define DISP_DIWHSTRT (DISP_BASE + 0xec)
#define DISP_DIWVSTRT (DISP_BASE + 0xf0)
/* Pixel clocks, one for TV output, doubled for VGA output */
#define TV_CLK 74239
#define VGA_CLK 37119
/* This is for 60Hz - the VTOTAL is doubled for interlaced modes */
#define PAL_HTOTAL 863
#define PAL_VTOTAL 312
#define NTSC_HTOTAL 857
#define NTSC_VTOTAL 262
/* Supported cable types */
enum { CT_VGA, CT_NONE, CT_RGB, CT_COMPOSITE };
/* Supported video output types */
enum { VO_PAL, VO_NTSC, VO_VGA };
/* Supported palette types */
enum { PAL_ARGB1555, PAL_RGB565, PAL_ARGB4444, PAL_ARGB8888 };
struct pvr2_params { unsigned int val; char *name; };
static struct pvr2_params cables[] __initdata = {
{ CT_VGA, "VGA" }, { CT_RGB, "RGB" }, { CT_COMPOSITE, "COMPOSITE" },
};
static struct pvr2_params outputs[] __initdata = {
{ VO_PAL, "PAL" }, { VO_NTSC, "NTSC" }, { VO_VGA, "VGA" },
};
/*
* This describes the current video mode
*/
static struct pvr2fb_par {
unsigned int hsync_total; /* Clocks/line */
unsigned int vsync_total; /* Lines/field */
unsigned int borderstart_h;
unsigned int borderstop_h;
unsigned int borderstart_v;
unsigned int borderstop_v;
unsigned int diwstart_h; /* Horizontal offset of the display field */
unsigned int diwstart_v; /* Vertical offset of the display field, for
interlaced modes, this is the long field */
unsigned long disp_start; /* Address of image within VRAM */
unsigned char is_interlaced; /* Is the display interlaced? */
unsigned char is_doublescan; /* Are scanlines output twice? (doublescan) */
unsigned char is_lowres; /* Is horizontal pixel-doubling enabled? */
unsigned long mmio_base; /* MMIO base */
} *currentpar;
static struct fb_info *fb_info;
static struct fb_fix_screeninfo pvr2_fix __initdata = {
.id = "NEC PowerVR2",
.type = FB_TYPE_PACKED_PIXELS,
.visual = FB_VISUAL_TRUECOLOR,
.ypanstep = 1,
.ywrapstep = 1,
.accel = FB_ACCEL_NONE,
};
static struct fb_var_screeninfo pvr2_var __initdata = {
.xres = 640,
.yres = 480,
.xres_virtual = 640,
.yres_virtual = 480,
.bits_per_pixel =16,
.red = { 11, 5, 0 },
.green = { 5, 6, 0 },
.blue = { 0, 5, 0 },
.activate = FB_ACTIVATE_NOW,
.height = -1,
.width = -1,
.vmode = FB_VMODE_NONINTERLACED,
};
static int cable_type = CT_VGA;
static int video_output = VO_VGA;
static int nopan = 0;
static int nowrap = 1;
/*
* We do all updating, blanking, etc. during the vertical retrace period
*/
static unsigned int do_vmode_full = 0; /* Change the video mode */
static unsigned int do_vmode_pan = 0; /* Update the video mode */
static short do_blank = 0; /* (Un)Blank the screen */
static unsigned int is_blanked = 0; /* Is the screen blanked? */
#ifdef CONFIG_SH_STORE_QUEUES
static unsigned long pvr2fb_map;
#endif
#ifdef CONFIG_SH_DMA
static unsigned int shdma = PVR2_CASCADE_CHAN;
static unsigned int pvr2dma = ONCHIP_NR_DMA_CHANNELS;
#endif
/* Interface used by the world */
int pvr2fb_setup(char*);
static int pvr2fb_setcolreg(unsigned int regno, unsigned int red, unsigned int green, unsigned int blue,
unsigned int transp, struct fb_info *info);
static int pvr2fb_blank(int blank, struct fb_info *info);
static unsigned long get_line_length(int xres_virtual, int bpp);
static void set_color_bitfields(struct fb_var_screeninfo *var);
static int pvr2fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info);
static int pvr2fb_set_par(struct fb_info *info);
static void pvr2_update_display(struct fb_info *info);
static void pvr2_init_display(struct fb_info *info);
static void pvr2_do_blank(void);
static irqreturn_t pvr2fb_interrupt(int irq, void *dev_id);
static int pvr2_init_cable(void);
static int pvr2_get_param(const struct pvr2_params *p, const char *s,
int val, int size);
#ifdef CONFIG_SH_DMA
static ssize_t pvr2fb_write(struct file *file, const char *buf,
size_t count, loff_t *ppos);
#endif
static struct fb_ops pvr2fb_ops = {
.owner = THIS_MODULE,
.fb_setcolreg = pvr2fb_setcolreg,
.fb_blank = pvr2fb_blank,
.fb_check_var = pvr2fb_check_var,
.fb_set_par = pvr2fb_set_par,
#ifdef CONFIG_SH_DMA
.fb_write = pvr2fb_write,
#endif
.fb_fillrect = cfb_fillrect,
.fb_copyarea = cfb_copyarea,
.fb_imageblit = cfb_imageblit,
};
static struct fb_videomode pvr2_modedb[] __initdata = {
/*
* Broadcast video modes (PAL and NTSC). I'm unfamiliar with
* PAL-M and PAL-N, but from what I've read both modes parallel PAL and
* NTSC, so it shouldn't be a problem (I hope).
*/
{
/* 640x480 @ 60Hz interlaced (NTSC) */
"ntsc_640x480i", 60, 640, 480, TV_CLK, 38, 33, 0, 18, 146, 26,
FB_SYNC_BROADCAST, FB_VMODE_INTERLACED | FB_VMODE_YWRAP
}, {
/* 640x240 @ 60Hz (NTSC) */
/* XXX: Broken! Don't use... */
"ntsc_640x240", 60, 640, 240, TV_CLK, 38, 33, 0, 0, 146, 22,
FB_SYNC_BROADCAST, FB_VMODE_YWRAP
}, {
/* 640x480 @ 60hz (VGA) */
"vga_640x480", 60, 640, 480, VGA_CLK, 38, 33, 0, 18, 146, 26,
0, FB_VMODE_YWRAP
},
};
#define NUM_TOTAL_MODES ARRAY_SIZE(pvr2_modedb)
#define DEFMODE_NTSC 0
#define DEFMODE_PAL 0
#define DEFMODE_VGA 2
static int defmode = DEFMODE_NTSC;
static char *mode_option __initdata = NULL;
static inline void pvr2fb_set_pal_type(unsigned int type)
{
struct pvr2fb_par *par = (struct pvr2fb_par *)fb_info->par;
fb_writel(type, par->mmio_base + 0x108);
}
static inline void pvr2fb_set_pal_entry(struct pvr2fb_par *par,
unsigned int regno,
unsigned int val)
{
fb_writel(val, par->mmio_base + 0x1000 + (4 * regno));
}
static int pvr2fb_blank(int blank, struct fb_info *info)
{
do_blank = blank ? blank : -1;
return 0;
}
static inline unsigned long get_line_length(int xres_virtual, int bpp)
{
return (unsigned long)((((xres_virtual*bpp)+31)&~31) >> 3);
}
static void set_color_bitfields(struct fb_var_screeninfo *var)
{
switch (var->bits_per_pixel) {
case 16: /* RGB 565 */
pvr2fb_set_pal_type(PAL_RGB565);
var->red.offset = 11; var->red.length = 5;
var->green.offset = 5; var->green.length = 6;
var->blue.offset = 0; var->blue.length = 5;
var->transp.offset = 0; var->transp.length = 0;
break;
case 24: /* RGB 888 */
var->red.offset = 16; var->red.length = 8;
var->green.offset = 8; var->green.length = 8;
var->blue.offset = 0; var->blue.length = 8;
var->transp.offset = 0; var->transp.length = 0;
break;
case 32: /* ARGB 8888 */
pvr2fb_set_pal_type(PAL_ARGB8888);
var->red.offset = 16; var->red.length = 8;
var->green.offset = 8; var->green.length = 8;
var->blue.offset = 0; var->blue.length = 8;
var->transp.offset = 24; var->transp.length = 8;
break;
}
}
static int pvr2fb_setcolreg(unsigned int regno, unsigned int red,
unsigned int green, unsigned int blue,
unsigned int transp, struct fb_info *info)
{
struct pvr2fb_par *par = (struct pvr2fb_par *)info->par;
unsigned int tmp;
if (regno > info->cmap.len)
return 1;
/*
* We only support the hardware palette for 16 and 32bpp. It's also
* expected that the palette format has been set by the time we get
* here, so we don't waste time setting it again.
*/
switch (info->var.bits_per_pixel) {
case 16: /* RGB 565 */
tmp = (red & 0xf800) |
((green & 0xfc00) >> 5) |
((blue & 0xf800) >> 11);
pvr2fb_set_pal_entry(par, regno, tmp);
((u16*)(info->pseudo_palette))[regno] = tmp;
break;
case 24: /* RGB 888 */
red >>= 8; green >>= 8; blue >>= 8;
((u32*)(info->pseudo_palette))[regno] = (red << 16) | (green << 8) | blue;
break;
case 32: /* ARGB 8888 */
red >>= 8; green >>= 8; blue >>= 8;
tmp = (transp << 24) | (red << 16) | (green << 8) | blue;
pvr2fb_set_pal_entry(par, regno, tmp);
((u32*)(info->pseudo_palette))[regno] = tmp;
break;
default:
pr_debug("Invalid bit depth %d?!?\n", info->var.bits_per_pixel);
return 1;
}
return 0;
}
static int pvr2fb_set_par(struct fb_info *info)
{
struct pvr2fb_par *par = (struct pvr2fb_par *)info->par;
struct fb_var_screeninfo *var = &info->var;
unsigned long line_length;
unsigned int vtotal;
/*
* XXX: It's possible that a user could use a VGA box, change the cable
* type in hardware (i.e. switch from VGA<->composite), then change
* modes (i.e. switching to another VT). If that happens we should
* automagically change the output format to cope, but currently I
* don't have a VGA box to make sure this works properly.
*/
cable_type = pvr2_init_cable();
if (cable_type == CT_VGA && video_output != VO_VGA)
video_output = VO_VGA;
var->vmode &= FB_VMODE_MASK;
if (var->vmode & FB_VMODE_INTERLACED && video_output != VO_VGA)
par->is_interlaced = 1;
/*
* XXX: Need to be more creative with this (i.e. allow doublecan for
* PAL/NTSC output).
*/
if (var->vmode & FB_VMODE_DOUBLE && video_output == VO_VGA)
par->is_doublescan = 1;
par->hsync_total = var->left_margin + var->xres + var->right_margin +
var->hsync_len;
par->vsync_total = var->upper_margin + var->yres + var->lower_margin +
var->vsync_len;
if (var->sync & FB_SYNC_BROADCAST) {
vtotal = par->vsync_total;
if (par->is_interlaced)
vtotal /= 2;
if (vtotal > (PAL_VTOTAL + NTSC_VTOTAL)/2) {
/* XXX: Check for start values here... */
/* XXX: Check hardware for PAL-compatibility */
par->borderstart_h = 116;
par->borderstart_v = 44;
} else {
/* NTSC video output */
par->borderstart_h = 126;
par->borderstart_v = 18;
}
} else {
/* VGA mode */
/* XXX: What else needs to be checked? */
/*
* XXX: We have a little freedom in VGA modes, what ranges
* should be here (i.e. hsync/vsync totals, etc.)?
*/
par->borderstart_h = 126;
par->borderstart_v = 40;
}
/* Calculate the remainding offsets */
par->diwstart_h = par->borderstart_h + var->left_margin;
par->diwstart_v = par->borderstart_v + var->upper_margin;
par->borderstop_h = par->diwstart_h + var->xres +
var->right_margin;
par->borderstop_v = par->diwstart_v + var->yres +
var->lower_margin;
if (!par->is_interlaced)
par->borderstop_v /= 2;
if (info->var.xres < 640)
par->is_lowres = 1;
line_length = get_line_length(var->xres_virtual, var->bits_per_pixel);
par->disp_start = info->fix.smem_start + (line_length * var->yoffset) * line_length;
info->fix.line_length = line_length;
return 0;
}
static int pvr2fb_check_var(struct fb_var_screeninfo *var, struct fb_info *info)
{
struct pvr2fb_par *par = (struct pvr2fb_par *)info->par;
unsigned int vtotal, hsync_total;
unsigned long line_length;
if (var->pixclock != TV_CLK && var->pixclock != VGA_CLK) {
pr_debug("Invalid pixclock value %d\n", var->pixclock);
return -EINVAL;
}
if (var->xres < 320)
var->xres = 320;
if (var->yres < 240)
var->yres = 240;
if (var->xres_virtual < var->xres)
var->xres_virtual = var->xres;
if (var->yres_virtual < var->yres)
var->yres_virtual = var->yres;
if (var->bits_per_pixel <= 16)
var->bits_per_pixel = 16;
else if (var->bits_per_pixel <= 24)
var->bits_per_pixel = 24;
else if (var->bits_per_pixel <= 32)
var->bits_per_pixel = 32;
set_color_bitfields(var);
if (var->vmode & FB_VMODE_YWRAP) {
if (var->xoffset || var->yoffset < 0 ||
var->yoffset >= var->yres_virtual) {
var->xoffset = var->yoffset = 0;
} else {
if (var->xoffset > var->xres_virtual - var->xres ||
var->yoffset > var->yres_virtual - var->yres ||
var->xoffset < 0 || var->yoffset < 0)
var->xoffset = var->yoffset = 0;
}
} else {
var->xoffset = var->yoffset = 0;
}
/*
* XXX: Need to be more creative with this (i.e. allow doublecan for
* PAL/NTSC output).
*/
if (var->yres < 480 && video_output == VO_VGA)
var->vmode |= FB_VMODE_DOUBLE;
if (video_output != VO_VGA) {
var->sync |= FB_SYNC_BROADCAST;
var->vmode |= FB_VMODE_INTERLACED;
} else {
var->sync &= ~FB_SYNC_BROADCAST;
var->vmode &= ~FB_VMODE_INTERLACED;
var->vmode |= pvr2_var.vmode;
}
if ((var->activate & FB_ACTIVATE_MASK) != FB_ACTIVATE_TEST) {
var->right_margin = par->borderstop_h -
(par->diwstart_h + var->xres);
var->left_margin = par->diwstart_h - par->borderstart_h;
var->hsync_len = par->borderstart_h +
(par->hsync_total - par->borderstop_h);
var->upper_margin = par->diwstart_v - par->borderstart_v;
var->lower_margin = par->borderstop_v -
(par->diwstart_v + var->yres);
var->vsync_len = par->borderstop_v +
(par->vsync_total - par->borderstop_v);
}
hsync_total = var->left_margin + var->xres + var->right_margin +
var->hsync_len;
vtotal = var->upper_margin + var->yres + var->lower_margin +
var->vsync_len;
if (var->sync & FB_SYNC_BROADCAST) {
if (var->vmode & FB_VMODE_INTERLACED)
vtotal /= 2;
if (vtotal > (PAL_VTOTAL + NTSC_VTOTAL)/2) {
/* PAL video output */
/* XXX: Should be using a range here ... ? */
if (hsync_total != PAL_HTOTAL) {
pr_debug("invalid hsync total for PAL\n");
return -EINVAL;
}
} else {
/* NTSC video output */
if (hsync_total != NTSC_HTOTAL) {
pr_debug("invalid hsync total for NTSC\n");
return -EINVAL;
}
}
}
/* Check memory sizes */
line_length = get_line_length(var->xres_virtual, var->bits_per_pixel);
if (line_length * var->yres_virtual > info->fix.smem_len)
return -ENOMEM;
return 0;
}
static void pvr2_update_display(struct fb_info *info)
{
struct pvr2fb_par *par = (struct pvr2fb_par *) info->par;
struct fb_var_screeninfo *var = &info->var;
/* Update the start address of the display image */
fb_writel(par->disp_start, DISP_DIWADDRL);
fb_writel(par->disp_start +
get_line_length(var->xoffset+var->xres, var->bits_per_pixel),
DISP_DIWADDRS);
}
/*
* Initialize the video mode. Currently, the 16bpp and 24bpp modes aren't
* very stable. It's probably due to the fact that a lot of the 2D video
* registers are still undocumented.
*/
static void pvr2_init_display(struct fb_info *info)
{
struct pvr2fb_par *par = (struct pvr2fb_par *) info->par;
struct fb_var_screeninfo *var = &info->var;
unsigned int diw_height, diw_width, diw_modulo = 1;
unsigned int bytesperpixel = var->bits_per_pixel >> 3;
/* hsync and vsync totals */
fb_writel((par->vsync_total << 16) | par->hsync_total, DISP_SYNCSIZE);
/* column height, modulo, row width */
/* since we're "panning" within vram, we need to offset things based
* on the offset from the virtual x start to our real gfx. */
if (video_output != VO_VGA && par->is_interlaced)
diw_modulo += info->fix.line_length / 4;
diw_height = (par->is_interlaced ? var->yres / 2 : var->yres);
diw_width = get_line_length(var->xres, var->bits_per_pixel) / 4;
fb_writel((diw_modulo << 20) | (--diw_height << 10) | --diw_width,
DISP_DIWSIZE);
/* display address, long and short fields */
fb_writel(par->disp_start, DISP_DIWADDRL);
fb_writel(par->disp_start +
get_line_length(var->xoffset+var->xres, var->bits_per_pixel),
DISP_DIWADDRS);
/* border horizontal, border vertical, border color */
fb_writel((par->borderstart_h << 16) | par->borderstop_h, DISP_BRDRHORZ);
fb_writel((par->borderstart_v << 16) | par->borderstop_v, DISP_BRDRVERT);
fb_writel(0, DISP_BRDRCOLR);
/* display window start position */
fb_writel(par->diwstart_h, DISP_DIWHSTRT);
fb_writel((par->diwstart_v << 16) | par->diwstart_v, DISP_DIWVSTRT);
/* misc. settings */
fb_writel((0x16 << 16) | par->is_lowres, DISP_DIWCONF);
/* clock doubler (for VGA), scan doubler, display enable */
fb_writel(((video_output == VO_VGA) << 23) |
(par->is_doublescan << 1) | 1, DISP_DIWMODE);
/* bits per pixel */
fb_writel(fb_readl(DISP_DIWMODE) | (--bytesperpixel << 2), DISP_DIWMODE);
/* video enable, color sync, interlace,
* hsync and vsync polarity (currently unused) */
fb_writel(0x100 | ((par->is_interlaced /*|4*/) << 4), DISP_SYNCCONF);
}
/* Simulate blanking by making the border cover the entire screen */
#define BLANK_BIT (1<<3)
static void pvr2_do_blank(void)
{
struct pvr2fb_par *par = currentpar;
unsigned long diwconf;
diwconf = fb_readl(DISP_DIWCONF);
if (do_blank > 0)
fb_writel(diwconf | BLANK_BIT, DISP_DIWCONF);
else
fb_writel(diwconf & ~BLANK_BIT, DISP_DIWCONF);
is_blanked = do_blank > 0 ? do_blank : 0;
}
static irqreturn_t pvr2fb_interrupt(int irq, void *dev_id)
{
struct fb_info *info = dev_id;
if (do_vmode_pan || do_vmode_full)
pvr2_update_display(info);
if (do_vmode_full)
pvr2_init_display(info);
if (do_vmode_pan)
do_vmode_pan = 0;
if (do_vmode_full)
do_vmode_full = 0;
if (do_blank) {
pvr2_do_blank();
do_blank = 0;
}
return IRQ_HANDLED;
}
/*
* Determine the cable type and initialize the cable output format. Don't do
* anything if the cable type has been overidden (via "cable:XX").
*/
#define PCTRA 0xff80002c
#define PDTRA 0xff800030
#define VOUTC 0xa0702c00
static int pvr2_init_cable(void)
{
if (cable_type < 0) {
fb_writel((fb_readl(PCTRA) & 0xfff0ffff) | 0x000a0000,
PCTRA);
cable_type = (fb_readw(PDTRA) >> 8) & 3;
}
/* Now select the output format (either composite or other) */
/* XXX: Save the previous val first, as this reg is also AICA
related */
if (cable_type == CT_COMPOSITE)
fb_writel(3 << 8, VOUTC);
else
fb_writel(0, VOUTC);
return cable_type;
}
#ifdef CONFIG_SH_DMA
static ssize_t pvr2fb_write(struct file *file, const char *buf,
size_t count, loff_t *ppos)
{
unsigned long dst, start, end, len;
unsigned int nr_pages;
struct page **pages;
int ret, i;
nr_pages = (count + PAGE_SIZE - 1) >> PAGE_SHIFT;
pages = kmalloc(nr_pages * sizeof(struct page *), GFP_KERNEL);
if (!pages)
return -ENOMEM;
down_read(¤t->mm->mmap_sem);
ret = get_user_pages(current, current->mm, (unsigned long)buf,
nr_pages, WRITE, 0, pages, NULL);
up_read(¤t->mm->mmap_sem);
if (ret < nr_pages) {
nr_pages = ret;
ret = -EINVAL;
goto out_unmap;
}
dma_configure_channel(shdma, 0x12c1);
dst = (unsigned long)fb_info->screen_base + *ppos;
start = (unsigned long)page_address(pages[0]);
end = (unsigned long)page_address(pages[nr_pages]);
len = nr_pages << PAGE_SHIFT;
/* Half-assed contig check */
if (start + len == end) {
/* As we do this in one shot, it's either all or nothing.. */
if ((*ppos + len) > fb_info->fix.smem_len) {
ret = -ENOSPC;
goto out_unmap;
}
dma_write(shdma, start, 0, len);
dma_write(pvr2dma, 0, dst, len);
dma_wait_for_completion(pvr2dma);
goto out;
}
/* Not contiguous, writeout per-page instead.. */
for (i = 0; i < nr_pages; i++, dst += PAGE_SIZE) {
if ((*ppos + (i << PAGE_SHIFT)) > fb_info->fix.smem_len) {
ret = -ENOSPC;
goto out_unmap;
}
dma_write_page(shdma, (unsigned long)page_address(pages[i]), 0);
dma_write_page(pvr2dma, 0, dst);
dma_wait_for_completion(pvr2dma);
}
out:
*ppos += count;
ret = count;
out_unmap:
for (i = 0; i < nr_pages; i++)
page_cache_release(pages[i]);
kfree(pages);
return ret;
}
#endif /* CONFIG_SH_DMA */
/**
* pvr2fb_common_init
*
* Common init code for the PVR2 chips.
*
* This mostly takes care of the common aspects of the fb setup and
* registration. It's expected that the board-specific init code has
* already setup pvr2_fix with something meaningful at this point.
*
* Device info reporting is also done here, as well as picking a sane
* default from the modedb. For board-specific modelines, simply define
* a per-board modedb.
*
* Also worth noting is that the cable and video output types are likely
* always going to be VGA for the PCI-based PVR2 boards, but we leave this
* in for flexibility anyways. Who knows, maybe someone has tv-out on a
* PCI-based version of these things ;-)
*/
static int __init pvr2fb_common_init(void)
{
struct pvr2fb_par *par = currentpar;
unsigned long modememused, rev;
fb_info->screen_base = ioremap_nocache(pvr2_fix.smem_start,
pvr2_fix.smem_len);
if (!fb_info->screen_base) {
printk(KERN_ERR "pvr2fb: Failed to remap smem space\n");
goto out_err;
}
par->mmio_base = (unsigned long)ioremap_nocache(pvr2_fix.mmio_start,
pvr2_fix.mmio_len);
if (!par->mmio_base) {
printk(KERN_ERR "pvr2fb: Failed to remap mmio space\n");
goto out_err;
}
fb_memset(fb_info->screen_base, 0, pvr2_fix.smem_len);
pvr2_fix.ypanstep = nopan ? 0 : 1;
pvr2_fix.ywrapstep = nowrap ? 0 : 1;
fb_info->fbops = &pvr2fb_ops;
fb_info->fix = pvr2_fix;
fb_info->par = currentpar;
fb_info->pseudo_palette = (void *)(fb_info->par + 1);
fb_info->flags = FBINFO_DEFAULT | FBINFO_HWACCEL_YPAN;
if (video_output == VO_VGA)
defmode = DEFMODE_VGA;
if (!mode_option)
mode_option = "640x480@60";
if (!fb_find_mode(&fb_info->var, fb_info, mode_option, pvr2_modedb,
NUM_TOTAL_MODES, &pvr2_modedb[defmode], 16))
fb_info->var = pvr2_var;
fb_alloc_cmap(&fb_info->cmap, 256, 0);
if (register_framebuffer(fb_info) < 0)
goto out_err;
modememused = get_line_length(fb_info->var.xres_virtual,
fb_info->var.bits_per_pixel);
modememused *= fb_info->var.yres_virtual;
rev = fb_readl(par->mmio_base + 0x04);
printk("fb%d: %s (rev %ld.%ld) frame buffer device, using %ldk/%ldk of video memory\n",
fb_info->node, fb_info->fix.id, (rev >> 4) & 0x0f, rev & 0x0f,
modememused >> 10, (unsigned long)(fb_info->fix.smem_len >> 10));
printk("fb%d: Mode %dx%d-%d pitch = %ld cable: %s video output: %s\n",
fb_info->node, fb_info->var.xres, fb_info->var.yres,
fb_info->var.bits_per_pixel,
get_line_length(fb_info->var.xres, fb_info->var.bits_per_pixel),
(char *)pvr2_get_param(cables, NULL, cable_type, 3),
(char *)pvr2_get_param(outputs, NULL, video_output, 3));
#ifdef CONFIG_SH_STORE_QUEUES
printk(KERN_NOTICE "fb%d: registering with SQ API\n", fb_info->node);
pvr2fb_map = sq_remap(fb_info->fix.smem_start, fb_info->fix.smem_len,
fb_info->fix.id, pgprot_val(PAGE_SHARED));
printk(KERN_NOTICE "fb%d: Mapped video memory to SQ addr 0x%lx\n",
fb_info->node, pvr2fb_map);
#endif
return 0;
out_err:
if (fb_info->screen_base)
iounmap(fb_info->screen_base);
if (par->mmio_base)
iounmap((void *)par->mmio_base);
return -ENXIO;
}
#ifdef CONFIG_SH_DREAMCAST
static int __init pvr2fb_dc_init(void)
{
if (!mach_is_dreamcast())
return -ENXIO;
/* Make a guess at the monitor based on the attached cable */
if (pvr2_init_cable() == CT_VGA) {
fb_info->monspecs.hfmin = 30000;
fb_info->monspecs.hfmax = 70000;
fb_info->monspecs.vfmin = 60;
fb_info->monspecs.vfmax = 60;
} else {
/* Not VGA, using a TV (taken from acornfb) */
fb_info->monspecs.hfmin = 15469;
fb_info->monspecs.hfmax = 15781;
fb_info->monspecs.vfmin = 49;
fb_info->monspecs.vfmax = 51;
}
/*
* XXX: This needs to pull default video output via BIOS or other means
*/
if (video_output < 0) {
if (cable_type == CT_VGA) {
video_output = VO_VGA;
} else {
video_output = VO_NTSC;
}
}
/*
* Nothing exciting about the DC PVR2 .. only a measly 8MiB.
*/
pvr2_fix.smem_start = 0xa5000000; /* RAM starts here */
pvr2_fix.smem_len = 8 << 20;
pvr2_fix.mmio_start = 0xa05f8000; /* registers start here */
pvr2_fix.mmio_len = 0x2000;
if (request_irq(HW_EVENT_VSYNC, pvr2fb_interrupt, 0,
"pvr2 VBL handler", fb_info)) {
return -EBUSY;
}
#ifdef CONFIG_SH_DMA
if (request_dma(pvr2dma, "pvr2") != 0) {
free_irq(HW_EVENT_VSYNC, 0);
return -EBUSY;
}
#endif
return pvr2fb_common_init();
}
static void pvr2fb_dc_exit(void)
{
if (fb_info->screen_base) {
iounmap(fb_info->screen_base);
fb_info->screen_base = NULL;
}
if (currentpar->mmio_base) {
iounmap((void *)currentpar->mmio_base);
currentpar->mmio_base = 0;
}
free_irq(HW_EVENT_VSYNC, 0);
#ifdef CONFIG_SH_DMA
free_dma(pvr2dma);
#endif
}
#endif /* CONFIG_SH_DREAMCAST */
#ifdef CONFIG_PCI
static int __devinit pvr2fb_pci_probe(struct pci_dev *pdev,
const struct pci_device_id *ent)
{
int ret;
ret = pci_enable_device(pdev);
if (ret) {
printk(KERN_ERR "pvr2fb: PCI enable failed\n");
return ret;
}
ret = pci_request_regions(pdev, "pvr2fb");
if (ret) {
printk(KERN_ERR "pvr2fb: PCI request regions failed\n");
return ret;
}
/*
* Slightly more exciting than the DC PVR2 .. 16MiB!
*/
pvr2_fix.smem_start = pci_resource_start(pdev, 0);
pvr2_fix.smem_len = pci_resource_len(pdev, 0);
pvr2_fix.mmio_start = pci_resource_start(pdev, 1);
pvr2_fix.mmio_len = pci_resource_len(pdev, 1);
fb_info->device = &pdev->dev;
return pvr2fb_common_init();
}
static void __devexit pvr2fb_pci_remove(struct pci_dev *pdev)
{
if (fb_info->screen_base) {
iounmap(fb_info->screen_base);
fb_info->screen_base = NULL;
}
if (currentpar->mmio_base) {
iounmap((void *)currentpar->mmio_base);
currentpar->mmio_base = 0;
}
pci_release_regions(pdev);
}
static struct pci_device_id pvr2fb_pci_tbl[] __devinitdata = {
{ PCI_VENDOR_ID_NEC, PCI_DEVICE_ID_NEC_NEON250,
PCI_ANY_ID, PCI_ANY_ID, 0, 0, 0 },
{ 0, },
};
MODULE_DEVICE_TABLE(pci, pvr2fb_pci_tbl);
static struct pci_driver pvr2fb_pci_driver = {
.name = "pvr2fb",
.id_table = pvr2fb_pci_tbl,
.probe = pvr2fb_pci_probe,
.remove = __devexit_p(pvr2fb_pci_remove),
};
static int __init pvr2fb_pci_init(void)
{
return pci_register_driver(&pvr2fb_pci_driver);
}
static void pvr2fb_pci_exit(void)
{
pci_unregister_driver(&pvr2fb_pci_driver);
}
#endif /* CONFIG_PCI */
static int __init pvr2_get_param(const struct pvr2_params *p, const char *s,
int val, int size)
{
int i;