aboutsummaryrefslogtreecommitdiffstats
path: root/grub-core/video/sm712.c
blob: 60f2c9089af6897633d68ee9ea3172af410440b5 (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
/*
 *  GRUB  --  GRand Unified Bootloader
 *  Copyright (C) 2005,2006,2007,2008,2009,2010  Free Software Foundation, Inc.
 *
 *  GRUB is free software: you can redistribute it and/or modify
 *  it under the terms of the GNU General Public License as published by
 *  the Free Software Foundation, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  GRUB is distributed in the hope that it will be useful,
 *  but WITHOUT ANY WARRANTY; without even the implied warranty of
 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 *  GNU General Public License for more details.
 *
 *  You should have received a copy of the GNU General Public License
 *  along with GRUB.  If not, see <http://www.gnu.org/licenses/>.
 */

#define grub_video_render_target grub_video_fbrender_target

#include <grub/err.h>
#include <grub/types.h>
#include <grub/dl.h>
#include <grub/misc.h>
#include <grub/mm.h>
#include <grub/video.h>
#include <grub/video_fb.h>
#include <grub/pci.h>
#include <grub/vga.h>

#include "sm712_init.c"

#define GRUB_SM712_TOTAL_MEMORY_SPACE  0x700400
#define GRUB_SM712_REG_BASE 0x700000
#define GRUB_SM712_PCIID 0x0712126f

enum
  {
    GRUB_SM712_SR_TV_CONTROL = 0x65,
    GRUB_SM712_SR_RAM_LUT = 0x66,
    GRUB_SM712_SR_CLOCK_CONTROL1 = 0x68,
    GRUB_SM712_SR_CLOCK_CONTROL2 = 0x69,
    GRUB_SM712_SR_VCLK_NUM = 0x6c,
    GRUB_SM712_SR_VCLK_DENOM = 0x6d,
    GRUB_SM712_SR_VCLK2_NUM = 0x6e,
    GRUB_SM712_SR_VCLK2_DENOM = 0x6f,
    GRUB_SM712_SR_POPUP_ICON_LOW = 0x80,
    GRUB_SM712_SR_POPUP_ICON_HIGH = 0x81,
    GRUB_SM712_SR_POPUP_ICON_CTRL = 0x82,
    GRUB_SM712_SR_POPUP_ICON_COLOR1 = 0x84,
    GRUB_SM712_SR_POPUP_ICON_COLOR2 = 0x85,
    GRUB_SM712_SR_POPUP_ICON_COLOR3 = 0x86,

    GRUB_SM712_SR_HW_CURSOR_UPPER_LEFT_X_LOW = 0x88,
    GRUB_SM712_SR_HW_CURSOR_UPPER_LEFT_X_HIGH = 0x89,
    GRUB_SM712_SR_HW_CURSOR_UPPER_LEFT_Y_LOW = 0x8a,
    GRUB_SM712_SR_HW_CURSOR_UPPER_LEFT_Y_HIGH = 0x8b,
    GRUB_SM712_SR_HW_CURSOR_FG_COLOR = 0x8c,
    GRUB_SM712_SR_HW_CURSOR_BG_COLOR = 0x8d,

    GRUB_SM712_SR_POPUP_ICON_X_LOW = 0x90,
    GRUB_SM712_SR_POPUP_ICON_X_HIGH = 0x91,
    GRUB_SM712_SR_POPUP_ICON_Y_LOW = 0x92,
    GRUB_SM712_SR_POPUP_ICON_Y_HIGH = 0x93,
    GRUB_SM712_SR_PANEL_HW_VIDEO_CONTROL = 0xa0,
    GRUB_SM712_SR_PANEL_HW_VIDEO_COLOR_KEY_LOW = 0xa1,
    GRUB_SM712_SR_PANEL_HW_VIDEO_COLOR_KEY_HIGH = 0xa2,
    GRUB_SM712_SR_PANEL_HW_VIDEO_COLOR_KEY_MASK_LOW = 0xa3,
    GRUB_SM712_SR_PANEL_HW_VIDEO_COLOR_KEY_MASK_HIGH = 0xa4,
    GRUB_SM712_SR_PANEL_HW_VIDEO_RED_CONSTANT = 0xa5,
    GRUB_SM712_SR_PANEL_HW_VIDEO_GREEN_CONSTANT = 0xa6,
    GRUB_SM712_SR_PANEL_HW_VIDEO_BLUE_CONSTANT = 0xa7,
    GRUB_SM712_SR_PANEL_HW_VIDEO_TOP_BOUNDARY = 0xa8,
    GRUB_SM712_SR_PANEL_HW_VIDEO_LEFT_BOUNDARY = 0xa9,
    GRUB_SM712_SR_PANEL_HW_VIDEO_BOTTOM_BOUNDARY = 0xaa,
    GRUB_SM712_SR_PANEL_HW_VIDEO_RIGHT_BOUNDARY = 0xab,
    GRUB_SM712_SR_PANEL_HW_VIDEO_TOP_LEFT_OVERFLOW_BOUNDARY = 0xac,
    GRUB_SM712_SR_PANEL_HW_VIDEO_BOTTOM_RIGHT_OVERFLOW_BOUNDARY = 0xad,
    GRUB_SM712_SR_PANEL_HW_VIDEO_VERTICAL_STRETCH_FACTOR = 0xae,
    GRUB_SM712_SR_PANEL_HW_VIDEO_HORIZONTAL_STRETCH_FACTOR = 0xaf,
  };
enum
  {
    GRUB_SM712_SR_TV_CRT_SRAM = 0x00,
    GRUB_SM712_SR_TV_LCD_SRAM = 0x08
  };
enum
  {
    GRUB_SM712_SR_TV_ALT_CLOCK = 0x00,
    GRUB_SM712_SR_TV_FREE_RUN_CLOCK = 0x04
  };
enum
  {
    GRUB_SM712_SR_TV_CLOCK_CKIN_NTSC = 0x00,
    GRUB_SM712_SR_TV_CLOCK_REFCLK_PAL = 0x04
  };
enum
  {
    GRUB_SM712_SR_TV_HSYNC = 0x00,
    GRUB_SM712_SR_TV_COMPOSITE_HSYNC = 0x01
  };
enum
  {
    GRUB_SM712_SR_RAM_LUT_NORMAL = 0,
    GRUB_SM712_SR_RAM_LUT_LCD_RAM_OFF = 0x80,
    GRUB_SM712_SR_RAM_LUT_CRT_RAM_OFF = 0x40,
    GRUB_SM712_SR_RAM_LUT_LCD_RAM_NO_WRITE = 0x20,
    GRUB_SM712_SR_RAM_LUT_CRT_RAM_NO_WRITE = 0x10,
    GRUB_SM712_SR_RAM_LUT_CRT_8BIT = 0x08,
    GRUB_SM712_SR_RAM_LUT_CRT_GAMMA = 0x04
  };

enum
  {
    GRUB_SM712_SR_CLOCK_CONTROL1_VCLK_FROM_CCR = 0x40,
    GRUB_SM712_SR_CLOCK_CONTROL1_8DOT_CLOCK = 0x10,
  };

enum
  {
    GRUB_SM712_SR_CLOCK_CONTROL2_PROGRAM_VCLOCK = 0x03
  };

#define GRUB_SM712_SR_POPUP_ICON_HIGH_MASK 0x7
#define GRUB_SM712_SR_POPUP_ICON_HIGH_HW_CURSOR_EN 0x80
  enum
  {
    GRUB_SM712_SR_POPUP_ICON_CTRL_DISABLED = 0,
    GRUB_SM712_SR_POPUP_ICON_CTRL_ZOOM_ENABLED = 0x40,
    GRUB_SM712_SR_POPUP_ICON_CTRL_ENABLED = 0x80
  };
#define RGB332_BLACK 0
#define RGB332_WHITE 0xff

  enum
  {
    GRUB_SM712_CR_OVERFLOW_INTERLACE = 0x30,
    GRUB_SM712_CR_INTERLACE_RETRACE = 0x31,
    GRUB_SM712_CR_TV_VDISPLAY_START = 0x32,
    GRUB_SM712_CR_TV_VDISPLAY_END_HIGH = 0x33,
    GRUB_SM712_CR_TV_VDISPLAY_END_LOW = 0x34,
    GRUB_SM712_CR_DDA_CONTROL_LOW = 0x35,
    GRUB_SM712_CR_DDA_CONTROL_HIGH = 0x36,
    GRUB_SM712_CR_TV_EQUALIZER = 0x38,
    GRUB_SM712_CR_TV_SERRATION = 0x39,
    GRUB_SM712_CR_HSYNC_CTRL = 0x3a,
    GRUB_SM712_CR_DEBUG = 0x3c,
    GRUB_SM712_CR_SHADOW_VGA_HTOTAL = 0x40,
    GRUB_SM712_CR_SHADOW_VGA_HBLANK_START = 0x41,
    GRUB_SM712_CR_SHADOW_VGA_HBLANK_END = 0x42,
    GRUB_SM712_CR_SHADOW_VGA_HRETRACE_START = 0x43,
    GRUB_SM712_CR_SHADOW_VGA_HRETRACE_END = 0x44,
    GRUB_SM712_CR_SHADOW_VGA_VERTICAL_TOTAL = 0x45,
    GRUB_SM712_CR_SHADOW_VGA_VBLANK_START = 0x46,
    GRUB_SM712_CR_SHADOW_VGA_VBLANK_END = 0x47,
    GRUB_SM712_CR_SHADOW_VGA_VRETRACE_START = 0x48,
    GRUB_SM712_CR_SHADOW_VGA_VRETRACE_END = 0x49,    
    GRUB_SM712_CR_SHADOW_VGA_OVERFLOW = 0x4a,
    GRUB_SM712_CR_SHADOW_VGA_CELL_HEIGHT = 0x4b,
    GRUB_SM712_CR_SHADOW_VGA_HDISPLAY_END = 0x4c,
    GRUB_SM712_CR_SHADOW_VGA_VDISPLAY_END = 0x4d,
    GRUB_SM712_CR_DDA_LOOKUP_REG3_START = 0x90,
    GRUB_SM712_CR_DDA_LOOKUP_REG2_START = 0x91,
    GRUB_SM712_CR_DDA_LOOKUP_REG1_START = 0xa0,
    GRUB_SM712_CR_VCENTERING_OFFSET = 0xa6,
    GRUB_SM712_CR_HCENTERING_OFFSET = 0xa7,
  };

#define GRUB_SM712_CR_DEBUG_NONE 0

#define SM712_DDA_REG3_COMPARE_SHIFT 2
#define SM712_DDA_REG3_COMPARE_MASK  0xfc
#define SM712_DDA_REG3_DDA_SHIFT 8
#define SM712_DDA_REG3_DDA_MASK  0x3
#define SM712_DDA_REG2_DDA_MASK  0xff
#define SM712_DDA_REG2_VCENTER_MASK 0x3f

static struct
{
  grub_uint8_t compare;
  grub_uint16_t dda;
  grub_uint8_t vcentering;
} dda_lookups[] = {
  { 21, 469,  2},
  { 23, 477,  2},
  { 33, 535,  2},
  { 35, 682, 21},
  { 34, 675,  2},
  { 55, 683,  6},
};

static struct
{
  struct grub_video_mode_info mode_info;
  struct grub_video_render_target *render_target;

  grub_uint8_t *ptr;
  int mapped;
  grub_uint32_t base;
  grub_pci_device_t dev;
} framebuffer;

#ifndef TEST
static grub_err_t
grub_video_sm712_video_init (void)
{
  /* Reset frame buffer.  */
  grub_memset (&framebuffer, 0, sizeof(framebuffer));

  return grub_video_fb_init ();
}

static grub_err_t
grub_video_sm712_video_fini (void)
{
  if (framebuffer.mapped)
    grub_pci_device_unmap_range (framebuffer.dev, framebuffer.ptr,
				 GRUB_SM712_TOTAL_MEMORY_SPACE);

  return grub_video_fb_fini ();
}
#endif

static inline void
grub_sm712_write_reg (grub_uint8_t val, grub_uint16_t addr)
{
#ifdef TEST
  printf ("  {1, 0x%x, 0x%x},\n", addr, val);
#else
   *(volatile grub_uint8_t *) (framebuffer.ptr + GRUB_SM712_REG_BASE
			       + addr) = val;
#endif
}

static inline grub_uint8_t
grub_sm712_read_reg (grub_uint16_t addr)
{
#ifdef TEST
  printf ("  {-1, 0x%x, 0x5},\n", addr);
#else
  return *(volatile grub_uint8_t *) (framebuffer.ptr + GRUB_SM712_REG_BASE
				     + addr);
#endif
}

static inline grub_uint8_t
grub_sm712_sr_read (grub_uint8_t addr)
{
  grub_sm712_write_reg (addr, GRUB_VGA_IO_SR_INDEX);
  return grub_sm712_read_reg (GRUB_VGA_IO_SR_DATA);
}

static inline void
grub_sm712_sr_write (grub_uint8_t val, grub_uint8_t addr)
{
  grub_sm712_write_reg (addr, GRUB_VGA_IO_SR_INDEX);
  grub_sm712_write_reg (val, GRUB_VGA_IO_SR_DATA);
}

static inline void
grub_sm712_gr_write (grub_uint8_t val, grub_uint8_t addr)
{
  grub_sm712_write_reg (addr, GRUB_VGA_IO_GR_INDEX);
  grub_sm712_write_reg (val, GRUB_VGA_IO_GR_DATA);
}

static inline void
grub_sm712_cr_write (grub_uint8_t val, grub_uint8_t addr)
{
  grub_sm712_write_reg (addr, GRUB_VGA_IO_CR_INDEX);
  grub_sm712_write_reg (val, GRUB_VGA_IO_CR_DATA);
}

static inline void
grub_sm712_write_arx (grub_uint8_t val, grub_uint8_t addr)
{
  grub_sm712_read_reg (GRUB_VGA_IO_INPUT_STATUS1_REGISTER);
  grub_sm712_write_reg (addr, GRUB_VGA_IO_ARX);
  grub_sm712_read_reg (GRUB_VGA_IO_ARX_READ);
  grub_sm712_write_reg (val, GRUB_VGA_IO_ARX);
}

static inline void
grub_sm712_cr_shadow_write (grub_uint8_t val, grub_uint8_t addr)
{
  grub_uint8_t mapping[] =
    {
      [GRUB_VGA_CR_HTOTAL] = GRUB_SM712_CR_SHADOW_VGA_HTOTAL,
      [GRUB_VGA_CR_HORIZ_END] = 0xff,
      [GRUB_VGA_CR_HBLANK_START] = GRUB_SM712_CR_SHADOW_VGA_HBLANK_START,
      [GRUB_VGA_CR_HBLANK_END] = GRUB_SM712_CR_SHADOW_VGA_HBLANK_END,
      [GRUB_VGA_CR_HORIZ_SYNC_PULSE_START] = GRUB_SM712_CR_SHADOW_VGA_HRETRACE_START,
      [GRUB_VGA_CR_HORIZ_SYNC_PULSE_END] = GRUB_SM712_CR_SHADOW_VGA_HRETRACE_END,
      [GRUB_VGA_CR_VERT_TOTAL] = GRUB_SM712_CR_SHADOW_VGA_VERTICAL_TOTAL,
      [GRUB_VGA_CR_OVERFLOW] = GRUB_SM712_CR_SHADOW_VGA_OVERFLOW,
      [GRUB_VGA_CR_BYTE_PANNING] = 0xff,
      [GRUB_VGA_CR_CELL_HEIGHT] = GRUB_SM712_CR_SHADOW_VGA_CELL_HEIGHT,
      [GRUB_VGA_CR_CURSOR_START] = 0xff,
      [GRUB_VGA_CR_CURSOR_END] = 0xff,
      [GRUB_VGA_CR_START_ADDR_HIGH_REGISTER] = 0xff,
      [GRUB_VGA_CR_START_ADDR_LOW_REGISTER] = 0xff,
      [GRUB_VGA_CR_CURSOR_ADDR_HIGH] = 0xff,
      [GRUB_VGA_CR_CURSOR_ADDR_LOW] = 0xff,
      [GRUB_VGA_CR_VSYNC_START] = GRUB_SM712_CR_SHADOW_VGA_VRETRACE_START,
      [GRUB_VGA_CR_VSYNC_END] = GRUB_SM712_CR_SHADOW_VGA_VRETRACE_END,
      [GRUB_VGA_CR_VDISPLAY_END] = GRUB_SM712_CR_SHADOW_VGA_VDISPLAY_END,
      [GRUB_VGA_CR_PITCH] = GRUB_SM712_CR_SHADOW_VGA_HDISPLAY_END,
      [GRUB_VGA_CR_UNDERLINE_LOCATION] = 0xff,

      [GRUB_VGA_CR_VERTICAL_BLANK_START] = GRUB_SM712_CR_SHADOW_VGA_VBLANK_START,
      [GRUB_VGA_CR_VERTICAL_BLANK_END] = GRUB_SM712_CR_SHADOW_VGA_VBLANK_END,
      [GRUB_VGA_CR_MODE] = 0xff,
      [GRUB_VGA_CR_LINE_COMPARE] = 0xff
    };
  if (addr >= ARRAY_SIZE (mapping) || mapping[addr] == 0xff)
    return;
  grub_sm712_cr_write (val, mapping[addr]);
}

static inline void
grub_sm712_write_dda_lookup (int idx, grub_uint8_t compare, grub_uint16_t dda,
			     grub_uint8_t vcentering)
{
  grub_sm712_cr_write (((compare << SM712_DDA_REG3_COMPARE_SHIFT)
			& SM712_DDA_REG3_COMPARE_MASK)
		       | ((dda >> SM712_DDA_REG3_DDA_SHIFT)
			  & SM712_DDA_REG3_DDA_MASK),
		       GRUB_SM712_CR_DDA_LOOKUP_REG3_START + 2 * idx);
  grub_sm712_cr_write (dda & SM712_DDA_REG2_DDA_MASK,
		       GRUB_SM712_CR_DDA_LOOKUP_REG2_START + 2 * idx);
  grub_sm712_cr_write (vcentering & SM712_DDA_REG2_VCENTER_MASK,
		       GRUB_SM712_CR_DDA_LOOKUP_REG1_START + idx);
}

static grub_err_t
grub_video_sm712_setup (unsigned int width, unsigned int height,
			unsigned int mode_type, unsigned int mode_mask __attribute__ ((unused)))
{
  int depth;
  grub_err_t err;
  int found = 0;
  unsigned i;

#ifndef TEST
  auto int NESTED_FUNC_ATTR find_card (grub_pci_device_t dev, grub_pci_id_t pciid __attribute__ ((unused)));
  int NESTED_FUNC_ATTR find_card (grub_pci_device_t dev, grub_pci_id_t pciid __attribute__ ((unused)))
    {
      grub_pci_address_t addr;
      grub_uint32_t class;

      addr = grub_pci_make_address (dev, GRUB_PCI_REG_CLASS);
      class = grub_pci_read (addr);

      if (((class >> 16) & 0xffff) != GRUB_PCI_CLASS_SUBCLASS_VGA
	  || pciid != GRUB_SM712_PCIID)
	return 0;
      
      found = 1;

      addr = grub_pci_make_address (dev, GRUB_PCI_REG_ADDRESS_REG0);
      framebuffer.base = grub_pci_read (addr);
      framebuffer.dev = dev;

      return 1;
    }

  /* Decode depth from mode_type.  If it is zero, then autodetect.  */
  depth = (mode_type & GRUB_VIDEO_MODE_TYPE_DEPTH_MASK)
          >> GRUB_VIDEO_MODE_TYPE_DEPTH_POS;

  if ((width != 1024 && width != 0) || (height != 600 && height != 0)
      || (depth != 16 && depth != 0))
    return grub_error (GRUB_ERR_NOT_IMPLEMENTED_YET,
		       "Only 1024x600x16 is supported");

  grub_pci_iterate (find_card);
  if (!found)
    return grub_error (GRUB_ERR_IO, "Couldn't find graphics card");
#endif
  /* Fill mode info details.  */
  framebuffer.mode_info.width = 1024;
  framebuffer.mode_info.height = 600;
  framebuffer.mode_info.mode_type = GRUB_VIDEO_MODE_TYPE_RGB;
  framebuffer.mode_info.bpp = 16;
  framebuffer.mode_info.bytes_per_pixel = 2;
  framebuffer.mode_info.pitch = 1024 * 2;
  framebuffer.mode_info.number_of_colors = 256;
  framebuffer.mode_info.red_mask_size = 5;
  framebuffer.mode_info.red_field_pos = 11;
  framebuffer.mode_info.green_mask_size = 6;
  framebuffer.mode_info.green_field_pos = 5;
  framebuffer.mode_info.blue_mask_size = 5;
  framebuffer.mode_info.blue_field_pos = 0;
  framebuffer.mode_info.reserved_mask_size = 0;
  framebuffer.mode_info.reserved_field_pos = 0;
#ifndef TEST
  framebuffer.mode_info.blit_format
    = grub_video_get_blit_format (&framebuffer.mode_info);
#endif

#ifndef TEST
  if (found && framebuffer.base == 0)
    {
      grub_pci_address_t addr;
      /* FIXME: choose address dynamically if needed.   */
      framebuffer.base = 0x04000000;

      addr = grub_pci_make_address (framebuffer.dev, GRUB_PCI_REG_ADDRESS_REG0);
      grub_pci_write (addr, framebuffer.base);

      /* Set latency.  */
      addr = grub_pci_make_address (framebuffer.dev, GRUB_PCI_REG_CACHELINE);
      grub_pci_write (addr, 0x8);

      /* Enable address spaces.  */
      addr = grub_pci_make_address (framebuffer.dev, GRUB_PCI_REG_COMMAND);
      grub_pci_write (addr, 0x7);
    }
#endif

  /* We can safely discard volatile attribute.  */
#ifndef TEST
  framebuffer.ptr
    = (void *) grub_pci_device_map_range (framebuffer.dev,
					  framebuffer.base,
					  GRUB_SM712_TOTAL_MEMORY_SPACE);
#endif
  framebuffer.mapped = 1;

  /* Initialise SM712.  */
#ifndef TEST
  /* FIXME */
  grub_vga_sr_write (0x11, 0x18);
#endif

#ifndef TEST
  /* Prevent garbage from appearing on the screen.  */
  grub_memset (framebuffer.ptr, 0, 
	       framebuffer.mode_info.height * framebuffer.mode_info.pitch);
#endif

  /* FIXME */
  grub_sm712_sr_write (0, 0x21);
  grub_sm712_sr_write (0x7a, 0x62);
  grub_sm712_sr_write (0x16, 0x6a);
  grub_sm712_sr_write (0x2, 0x6b);
  grub_sm712_write_reg (0, GRUB_VGA_IO_PIXEL_MASK);
  grub_sm712_sr_write (GRUB_VGA_SR_RESET_ASYNC, GRUB_VGA_SR_RESET);
  grub_sm712_write_reg (GRUB_VGA_IO_MISC_NEGATIVE_VERT_POLARITY 
			| GRUB_VGA_IO_MISC_NEGATIVE_HORIZ_POLARITY
			| GRUB_VGA_IO_MISC_UPPER_64K
			| GRUB_VGA_IO_MISC_EXTERNAL_CLOCK_0
			| GRUB_VGA_IO_MISC_ENABLE_VRAM_ACCESS
			| GRUB_VGA_IO_MISC_COLOR, GRUB_VGA_IO_MISC_WRITE);
  grub_sm712_sr_write (GRUB_VGA_SR_RESET_ASYNC | GRUB_VGA_SR_RESET_SYNC,
		       GRUB_VGA_SR_RESET);
  grub_sm712_sr_write (GRUB_VGA_SR_CLOCKING_MODE_8_DOT_CLOCK,
		       GRUB_VGA_SR_CLOCKING_MODE);
  grub_sm712_sr_write (GRUB_VGA_ALL_PLANES, GRUB_VGA_SR_MAP_MASK_REGISTER);
  grub_sm712_sr_write (0, GRUB_VGA_SR_CHAR_MAP_SELECT);
  grub_sm712_sr_write (GRUB_VGA_SR_MEMORY_MODE_CHAIN4
		       | GRUB_VGA_SR_MEMORY_MODE_SEQUENTIAL_ADDRESSING
		       | GRUB_VGA_SR_MEMORY_MODE_EXTERNAL_VIDEO_MEMORY,
		       GRUB_VGA_SR_MEMORY_MODE);

  for (i = 0; i < ARRAY_SIZE (sm712_sr_seq1); i++)
    grub_sm712_sr_write (sm712_sr_seq1[i], 0x10 + i);

  for (i = 0; i < ARRAY_SIZE (sm712_sr_seq2); i++)
    grub_sm712_sr_write (sm712_sr_seq2[i], 0x30 + i);

  /* Undocumented.  */
  grub_sm712_sr_write (0x1a, 0x63);
  /* Undocumented.  */
  grub_sm712_sr_write (0x1a, 0x64);

  grub_sm712_sr_write (GRUB_SM712_SR_TV_CRT_SRAM | GRUB_SM712_SR_TV_ALT_CLOCK
		       | GRUB_SM712_SR_TV_CLOCK_CKIN_NTSC
		       | GRUB_SM712_SR_TV_HSYNC,
		       GRUB_SM712_SR_TV_CONTROL);

  grub_sm712_sr_write (GRUB_SM712_SR_RAM_LUT_NORMAL, GRUB_SM712_SR_RAM_LUT);

  /* Undocumented.  */
  grub_sm712_sr_write (0x00, 0x67);

  grub_sm712_sr_write (GRUB_SM712_SR_CLOCK_CONTROL1_VCLK_FROM_CCR
		       | GRUB_SM712_SR_CLOCK_CONTROL1_8DOT_CLOCK,
		       GRUB_SM712_SR_CLOCK_CONTROL1);
  grub_sm712_sr_write (GRUB_SM712_SR_CLOCK_CONTROL2_PROGRAM_VCLOCK,
		       GRUB_SM712_SR_CLOCK_CONTROL2);

  grub_sm712_sr_write (82, GRUB_SM712_SR_VCLK_NUM);
  grub_sm712_sr_write (137, GRUB_SM712_SR_VCLK_DENOM);

  grub_sm712_sr_write (9, GRUB_SM712_SR_VCLK2_NUM);
  grub_sm712_sr_write (2, GRUB_SM712_SR_VCLK2_DENOM);
  /* FIXME */
  grub_sm712_sr_write (0x04, 0x70);
  /* FIXME */
  grub_sm712_sr_write (0x45, 0x71);
  /* Undocumented */
  grub_sm712_sr_write (0x30, 0x72);
  /* Undocumented */
  grub_sm712_sr_write (0x30, 0x73);
  /* Undocumented */
  grub_sm712_sr_write (0x40, 0x74);
  /* Undocumented */
  grub_sm712_sr_write (0x20, 0x75);

  grub_sm712_sr_write (0xff, GRUB_SM712_SR_POPUP_ICON_LOW);
  grub_sm712_sr_write (GRUB_SM712_SR_POPUP_ICON_HIGH_MASK,
		       GRUB_SM712_SR_POPUP_ICON_HIGH);
  grub_sm712_sr_write (GRUB_SM712_SR_POPUP_ICON_CTRL_DISABLED,
		       GRUB_SM712_SR_POPUP_ICON_CTRL);
  /* Undocumented */
  grub_sm712_sr_write (0x0, 0x83);

  grub_sm712_sr_write (8, GRUB_SM712_SR_POPUP_ICON_COLOR1);
  grub_sm712_sr_write (0, GRUB_SM712_SR_POPUP_ICON_COLOR2);
  grub_sm712_sr_write (0x42, GRUB_SM712_SR_POPUP_ICON_COLOR3);

  /* Undocumented */
  grub_sm712_sr_write (0x3a, 0x87);

  /* Why theese coordinates?  */
  grub_sm712_sr_write (0x59, GRUB_SM712_SR_HW_CURSOR_UPPER_LEFT_X_LOW);
  grub_sm712_sr_write (0x02, GRUB_SM712_SR_HW_CURSOR_UPPER_LEFT_X_HIGH);
  grub_sm712_sr_write (0x44, GRUB_SM712_SR_HW_CURSOR_UPPER_LEFT_Y_LOW);
  grub_sm712_sr_write (0x02, GRUB_SM712_SR_HW_CURSOR_UPPER_LEFT_Y_HIGH);

  grub_sm712_sr_write (RGB332_BLACK, GRUB_SM712_SR_HW_CURSOR_FG_COLOR);
  grub_sm712_sr_write (RGB332_WHITE, GRUB_SM712_SR_HW_CURSOR_BG_COLOR);

  /* Undocumented */
  grub_sm712_sr_write (0x3a, 0x8e);
  grub_sm712_sr_write (0x3a, 0x8f);

  grub_sm712_sr_write (0, GRUB_SM712_SR_POPUP_ICON_X_LOW);
  grub_sm712_sr_write (0, GRUB_SM712_SR_POPUP_ICON_X_HIGH);
  grub_sm712_sr_write (0, GRUB_SM712_SR_POPUP_ICON_Y_LOW);
  grub_sm712_sr_write (0, GRUB_SM712_SR_POPUP_ICON_Y_HIGH);

  grub_sm712_sr_write (0, GRUB_SM712_SR_PANEL_HW_VIDEO_CONTROL);
  grub_sm712_sr_write (0x10, GRUB_SM712_SR_PANEL_HW_VIDEO_COLOR_KEY_LOW);
  grub_sm712_sr_write (0x08, GRUB_SM712_SR_PANEL_HW_VIDEO_COLOR_KEY_HIGH);
  grub_sm712_sr_write (0x00, GRUB_SM712_SR_PANEL_HW_VIDEO_COLOR_KEY_MASK_LOW);
  grub_sm712_sr_write (0x02, GRUB_SM712_SR_PANEL_HW_VIDEO_COLOR_KEY_MASK_HIGH);
  grub_sm712_sr_write (0xed, GRUB_SM712_SR_PANEL_HW_VIDEO_RED_CONSTANT);
  grub_sm712_sr_write (0xed, GRUB_SM712_SR_PANEL_HW_VIDEO_GREEN_CONSTANT);
  grub_sm712_sr_write (0xed, GRUB_SM712_SR_PANEL_HW_VIDEO_BLUE_CONSTANT);

  grub_sm712_sr_write (0x7b, GRUB_SM712_SR_PANEL_HW_VIDEO_TOP_BOUNDARY);
  grub_sm712_sr_write (0xfb, GRUB_SM712_SR_PANEL_HW_VIDEO_LEFT_BOUNDARY);
  grub_sm712_sr_write (0xff, GRUB_SM712_SR_PANEL_HW_VIDEO_BOTTOM_BOUNDARY);
  grub_sm712_sr_write (0xff, GRUB_SM712_SR_PANEL_HW_VIDEO_RIGHT_BOUNDARY);
  /* Doesn't match documentation?  */
  grub_sm712_sr_write (0x97, GRUB_SM712_SR_PANEL_HW_VIDEO_TOP_LEFT_OVERFLOW_BOUNDARY);
  grub_sm712_sr_write (0xef, GRUB_SM712_SR_PANEL_HW_VIDEO_BOTTOM_RIGHT_OVERFLOW_BOUNDARY);

  grub_sm712_sr_write (0xbf, GRUB_SM712_SR_PANEL_HW_VIDEO_VERTICAL_STRETCH_FACTOR);
  grub_sm712_sr_write (0xdf, GRUB_SM712_SR_PANEL_HW_VIDEO_HORIZONTAL_STRETCH_FACTOR);

  grub_sm712_gr_write (GRUB_VGA_NO_PLANES, GRUB_VGA_GR_SET_RESET_PLANE);
  grub_sm712_gr_write (GRUB_VGA_NO_PLANES, GRUB_VGA_GR_SET_RESET_PLANE_ENABLE);
  grub_sm712_gr_write (GRUB_VGA_NO_PLANES, GRUB_VGA_GR_COLOR_COMPARE);
  grub_sm712_gr_write (GRUB_VGA_GR_DATA_ROTATE_NOP, GRUB_VGA_GR_DATA_ROTATE);
  grub_sm712_gr_write (GRUB_VGA_NO_PLANES, GRUB_VGA_GR_READ_MAP_REGISTER);
  grub_sm712_gr_write (GRUB_VGA_GR_MODE_256_COLOR, GRUB_VGA_GR_MODE);
  grub_sm712_gr_write (GRUB_VGA_GR_GR6_MMAP_A0
		       | GRUB_VGA_GR_GR6_GRAPHICS_MODE, GRUB_VGA_GR_GR6);
  grub_sm712_gr_write (GRUB_VGA_ALL_PLANES, GRUB_VGA_GR_COLOR_COMPARE_DISABLE);
  grub_sm712_gr_write (0xff, GRUB_VGA_GR_BITMASK);

  /* Write palette mapping.  */
  for (i = 0; i < 16; i++)
    grub_sm712_write_arx (i, i);

  grub_sm712_write_arx (GRUB_VGA_ARX_MODE_ENABLE_256COLOR
			| GRUB_VGA_ARX_MODE_GRAPHICS, GRUB_VGA_ARX_MODE);
  grub_sm712_write_arx (0, GRUB_VGA_ARX_OVERSCAN);
  grub_sm712_write_arx (GRUB_VGA_ALL_PLANES, GRUB_VGA_ARX_COLOR_PLANE_ENABLE);
  grub_sm712_write_arx (0, GRUB_VGA_ARX_HORIZONTAL_PANNING);
  grub_sm712_write_arx (0, GRUB_VGA_ARX_COLOR_SELECT);

  /* FIXME: compute this generically.  */
  {
    struct grub_video_hw_config config =
      {
	.vertical_total = 806,
	.vertical_blank_start = 0x300,
	.vertical_blank_end = 0,
	.vertical_sync_start = 0x303,
	.vertical_sync_end = 0x9,
	.line_compare = 0x3ff,
	.vdisplay_end = 0x300,
	.pitch = 0x80,
	.horizontal_total = 164,
	.horizontal_end = 128,
	.horizontal_blank_start = 128,
	.horizontal_blank_end = 0,
	.horizontal_sync_pulse_start = 133,
	.horizontal_sync_pulse_end = 22
      };
    grub_vga_set_geometry (&config, grub_sm712_cr_write);
    config.horizontal_sync_pulse_start = 134;
    config.horizontal_sync_pulse_end = 21;
    config.vertical_sync_start = 0x301;
    config.vertical_sync_end = 0x0;
    config.line_compare = 0x0ff;
    config.vdisplay_end = 0x258;
    config.pitch = 0x7f;
    grub_vga_set_geometry (&config, grub_sm712_cr_shadow_write);
  }

  grub_sm712_cr_write (GRUB_VGA_CR_BYTE_PANNING_NORMAL,
		       GRUB_VGA_CR_BYTE_PANNING);
  grub_sm712_cr_write (0, GRUB_VGA_CR_CURSOR_START);
  grub_sm712_cr_write (0, GRUB_VGA_CR_CURSOR_END);
  grub_sm712_cr_write (0, GRUB_VGA_CR_START_ADDR_HIGH_REGISTER);
  grub_sm712_cr_write (0, GRUB_VGA_CR_START_ADDR_LOW_REGISTER);
  grub_sm712_cr_write (0, GRUB_VGA_CR_CURSOR_ADDR_HIGH);
  grub_sm712_cr_write (0, GRUB_VGA_CR_CURSOR_ADDR_LOW);
  grub_sm712_cr_write (GRUB_VGA_CR_UNDERLINE_LOCATION_DWORD_MODE,
		       GRUB_VGA_CR_UNDERLINE_LOCATION);
  grub_sm712_cr_write (GRUB_VGA_CR_MODE_ADDRESS_WRAP
		       | GRUB_VGA_CR_MODE_BYTE_MODE
		       | GRUB_VGA_CR_MODE_TIMING_ENABLE
		       | GRUB_VGA_CR_MODE_NO_CGA
		       | GRUB_VGA_CR_MODE_NO_HERCULES,
		       GRUB_VGA_CR_MODE);

  grub_sm712_cr_write (0, GRUB_SM712_CR_OVERFLOW_INTERLACE);
  grub_sm712_cr_write (0, GRUB_SM712_CR_INTERLACE_RETRACE);
  grub_sm712_cr_write (0, GRUB_SM712_CR_TV_VDISPLAY_START);
  grub_sm712_cr_write (0, GRUB_SM712_CR_TV_VDISPLAY_END_HIGH);
  grub_sm712_cr_write (0, GRUB_SM712_CR_TV_VDISPLAY_END_LOW);
  grub_sm712_cr_write (0x80, GRUB_SM712_CR_DDA_CONTROL_LOW);
  grub_sm712_cr_write (0x02, GRUB_SM712_CR_DDA_CONTROL_HIGH);

  /* Undocumented */
  grub_sm712_cr_write (0x20, 0x37);

  grub_sm712_cr_write (0, GRUB_SM712_CR_TV_EQUALIZER);
  grub_sm712_cr_write (0, GRUB_SM712_CR_TV_SERRATION);
  grub_sm712_cr_write (0, GRUB_SM712_CR_HSYNC_CTRL);

  /* Undocumented */
  grub_sm712_cr_write (0x40, 0x3b);

  grub_sm712_cr_write (GRUB_SM712_CR_DEBUG_NONE, GRUB_SM712_CR_DEBUG);

  /* Undocumented */
  grub_sm712_cr_write (0xff, 0x3d);
  grub_sm712_cr_write (0x46, 0x3e);
  grub_sm712_cr_write (0x91, 0x3f);

  for (i = 0; i < ARRAY_SIZE (dda_lookups); i++)
    grub_sm712_write_dda_lookup (i, dda_lookups[i].compare, dda_lookups[i].dda,
				 dda_lookups[i].vcentering);
  
  /* Undocumented  */
  grub_sm712_cr_write (0, 0x9c);
  grub_sm712_cr_write (0, 0x9d);
  grub_sm712_cr_write (0, 0x9e);
  grub_sm712_cr_write (0, 0x9f);

  grub_sm712_cr_write (0, GRUB_SM712_CR_VCENTERING_OFFSET);
  grub_sm712_cr_write (0, GRUB_SM712_CR_HCENTERING_OFFSET);

  grub_sm712_write_reg (GRUB_VGA_IO_MISC_NEGATIVE_HORIZ_POLARITY
			| GRUB_VGA_IO_MISC_UPPER_64K
			| GRUB_VGA_IO_MISC_28MHZ
			| GRUB_VGA_IO_MISC_ENABLE_VRAM_ACCESS
			| GRUB_VGA_IO_MISC_COLOR,
			GRUB_VGA_IO_MISC_WRITE);

#ifndef TEST
  /* Undocumented? */
  *(volatile grub_uint32_t *) ((char *) framebuffer.ptr + 0x40c00c) = 0;
  *(volatile grub_uint32_t *) ((char *) framebuffer.ptr + 0x40c040) = 0;
  *(volatile grub_uint32_t *) ((char *) framebuffer.ptr + 0x40c000) = 0x20000;
  *(volatile grub_uint32_t *) ((char *) framebuffer.ptr + 0x40c010) = 0x1020100;
#endif

  (void) grub_sm712_sr_read (0x16);

#ifndef TEST
  err = grub_video_fb_create_render_target_from_pointer (&framebuffer
							 .render_target,
							 &framebuffer.mode_info,
							 framebuffer.ptr);

  if (err)
    return err;

  err = grub_video_fb_set_active_render_target (framebuffer.render_target);
  
  if (err)
    return err;

  /* Copy default palette to initialize emulated palette.  */
  err = grub_video_fb_set_palette (0, GRUB_VIDEO_FBSTD_NUMCOLORS,
				   grub_video_fbstd_colors);
#endif
  return err;
}

#ifndef TEST

static grub_err_t
grub_video_sm712_swap_buffers (void)
{
  /* TODO: Implement buffer swapping.  */
  return GRUB_ERR_NONE;
}

static grub_err_t
grub_video_sm712_set_active_render_target (struct grub_video_render_target *target)
{
  if (target == GRUB_VIDEO_RENDER_TARGET_DISPLAY)
      target = framebuffer.render_target;

  return grub_video_fb_set_active_render_target (target);
}

static grub_err_t
grub_video_sm712_get_info_and_fini (struct grub_video_mode_info *mode_info,
				    void **framebuf)
{
  grub_memcpy (mode_info, &(framebuffer.mode_info), sizeof (*mode_info));
  *framebuf = (char *) framebuffer.ptr;

  grub_video_fb_fini ();

  return GRUB_ERR_NONE;
}

static struct grub_video_adapter grub_video_sm712_adapter =
  {
    .name = "SM712 Video Driver",
    .id = GRUB_VIDEO_DRIVER_SM712,

    .prio = GRUB_VIDEO_ADAPTER_PRIO_NATIVE,

    .init = grub_video_sm712_video_init,
    .fini = grub_video_sm712_video_fini,
    .setup = grub_video_sm712_setup,
    .get_info = grub_video_fb_get_info,
    .get_info_and_fini = grub_video_sm712_get_info_and_fini,
    .set_palette = grub_video_fb_set_palette,
    .get_palette = grub_video_fb_get_palette,
    .set_viewport = grub_video_fb_set_viewport,
    .get_viewport = grub_video_fb_get_viewport,
    .map_color = grub_video_fb_map_color,
    .map_rgb = grub_video_fb_map_rgb,
    .map_rgba = grub_video_fb_map_rgba,
    .unmap_color = grub_video_fb_unmap_color,
    .fill_rect = grub_video_fb_fill_rect,
    .blit_bitmap = grub_video_fb_blit_bitmap,
    .blit_render_target = grub_video_fb_blit_render_target,
    .scroll = grub_video_fb_scroll,
    .swap_buffers = grub_video_sm712_swap_buffers,
    .create_render_target = grub_video_fb_create_render_target,
    .delete_render_target = grub_video_fb_delete_render_target,
    .set_active_render_target = grub_video_sm712_set_active_render_target,
    .get_active_render_target = grub_video_fb_get_active_render_target,

    .next = 0
  };

GRUB_MOD_INIT(video_sm712)
{
  grub_video_register (&grub_video_sm712_adapter);
}

GRUB_MOD_FINI(video_sm712)
{
  grub_video_unregister (&grub_video_sm712_adapter);
}
#else
int
main ()
{
  grub_video_sm712_setup (1024, 600, 0, 0);
}
#endif