Linux preempt-rt

Check our new training course

Real-Time Linux with PREEMPT_RT

Check our new training course
with Creative Commons CC-BY-SA
lecture and lab materials

Bootlin logo

Elixir Cross Referencer

  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
/*
 *  linux/drivers/video/igafb.c -- Frame buffer device for IGA 1682
 *
 *      Copyright (C) 1998  Vladimir Roganov and Gleb Raiko
 *
 *  This driver is partly based on the Frame buffer device for ATI Mach64
 *  and partially on VESA-related code.
 *
 *      Copyright (C) 1997-1998  Geert Uytterhoeven
 *      Copyright (C) 1998  Bernd Harries
 *      Copyright (C) 1998  Eddie C. Dost  (ecd@skynet.be)
 *
 *  This file is subject to the terms and conditions of the GNU General Public
 *  License. See the file COPYING in the main directory of this archive for
 *  more details.
 */

/******************************************************************************

  TODO:
       Despite of IGA Card has advanced graphic acceleration, 
       initial version is almost dummy and does not support it.
       Support for video modes and acceleration must be added
       together with accelerated X-Windows driver implementation.

                                                (Anyone to help with this?)

       Most important thing at this moment is that we have working
       JavaEngine1  console & X  with new console interface.
       
******************************************************************************/

#include <linux/module.h>
#include <linux/kernel.h>
#include <linux/errno.h>
#include <linux/string.h>
#include <linux/mm.h>
#include <linux/tty.h>
#include <linux/malloc.h>
#include <linux/vmalloc.h>
#include <linux/delay.h>
#include <linux/interrupt.h>
#include <linux/fb.h>
#include <linux/selection.h>
#include <linux/console.h>
#include <linux/init.h>
#include <linux/pci.h>
#include <linux/nvram.h>
#include <linux/kd.h>
#include <linux/vt_kern.h>

#include <asm/io.h>

#ifdef __sparc__
#include <asm/pbm.h>
#include <asm/pcic.h>
#endif

#include <video/fbcon.h>
#include <video/fbcon-cfb8.h>
#include <video/fbcon-cfb16.h>
#include <video/fbcon-cfb24.h>
#include <video/fbcon-cfb32.h>

#include "iga.h"

static char igafb_name[16] = "IGA 1682";
static char fontname[40] __initdata = { 0 };

struct pci_mmap_map {
    unsigned long voff;
    unsigned long poff;
    unsigned long size;
    unsigned long prot_flag;
    unsigned long prot_mask;
};

struct fb_info_iga {
    struct fb_info fb_info;
    unsigned long frame_buffer_phys;
    unsigned long frame_buffer;
    unsigned long io_base_phys;
    unsigned long io_base;
    u32 total_vram;
    struct pci_mmap_map *mmap_map;
    struct { u_short blue, green, red, pad; } palette[256];
    int video_cmap_len;
    int currcon;
    struct display disp;
    struct display_switch dispsw; 
    union {
#ifdef FBCON_HAS_CFB16
	    u16 cfb16[16];  
#endif
#ifdef FBCON_HAS_CFB24
	    u32 cfb24[16];
#endif
#ifdef FBCON_HAS_CFB32
	    u32 cfb32[16];
#endif
    } fbcon_cmap;
#ifdef __sparc__
    u8 open;
    u8 mmaped;
    int vtconsole;
    int consolecnt;
#endif
};

struct fb_var_screeninfo default_var = {
    /* 640x480, 60 Hz, Non-Interlaced (25.175 MHz dotclock) */
    640, 480, 640, 480, 0, 0, 8, 0,
    {0, 8, 0}, {0, 8, 0}, {0, 8, 0}, {0, 0, 0},
    0, 0, -1, -1, 0, 39722, 48, 16, 33, 10, 96, 2,
    0, FB_VMODE_NONINTERLACED
};

#ifdef __sparc__
struct fb_var_screeninfo default_var_1024x768 __initdata = {
    /* 1024x768, 75 Hz, Non-Interlaced (78.75 MHz dotclock) */
    1024, 768, 1024, 768, 0, 0, 8, 0,
    {0, 8, 0}, {0, 8, 0}, {0, 8, 0}, {0, 0, 0},
    0, 0, -1, -1, 0, 12699, 176, 16, 28, 1, 96, 3,
    FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
};

struct fb_var_screeninfo default_var_1152x900 __initdata = {
    /* 1152x900, 76 Hz, Non-Interlaced (110.0 MHz dotclock) */
    1152, 900, 1152, 900, 0, 0, 8, 0,
    {0, 8, 0}, {0, 8, 0}, {0, 8, 0}, {0, 0, 0},
    0, 0, -1, -1, 0, 9091, 234, 24, 34, 3, 100, 3,
    FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
};

struct fb_var_screeninfo default_var_1280x1024 __initdata = {
    /* 1280x1024, 75 Hz, Non-Interlaced (135.00 MHz dotclock) */
    1280, 1024, 1280, 1024, 0, 0, 8, 0,
    {0, 8, 0}, {0, 8, 0}, {0, 8, 0}, {0, 0, 0},
    0, 0, -1, -1, 0, 7408, 248, 16, 38, 1, 144, 3,
    FB_SYNC_HOR_HIGH_ACT|FB_SYNC_VERT_HIGH_ACT, FB_VMODE_NONINTERLACED
};

/*
 *   Memory-mapped I/O functions for Sparc PCI
 */ 
static inline unsigned char pci_inb (struct fb_info_iga *info, 
				     unsigned int reg) 
{
	return *(volatile unsigned char*)(info->io_base + reg);
}
static inline void pci_outb (struct fb_info_iga *info, unsigned char c,
			     unsigned int reg) 
{
	*(volatile unsigned char*)(info->io_base + reg) = c;
}
static inline unsigned int iga_inb(struct fb_info_iga *info,
				   unsigned int reg, unsigned int idx )
{
        pci_outb(info, idx, reg);
        return pci_inb(info, reg + 1);
}
static inline void iga_outb(struct fb_info_iga *info, unsigned char val,
			    unsigned int reg, unsigned int idx )
{
        pci_outb(info, idx, reg);
        pci_outb(info, val, reg+1);
}

#endif /* __sparc__ */

/*
 *  Very important functionality for the JavaEngine1 computer:
 *  make screen border black (usign special IGA registers) 
 */
static void iga_blank_border(struct fb_info_iga *info)
{
        int i;

        for (i=0; i < 3; i++) 
                iga_outb(info, 0, IGA_EXT_CNTRL, IGA_IDX_OVERSCAN_COLOR + i);
}


/*
 *  Frame buffer device API
 */

/*
 * Open/Release the frame buffer device
 */

static int igafb_open(struct fb_info *info, int user)
{
        /*
         * Nothing, only a usage count for the moment
         */
        MOD_INC_USE_COUNT;
        return(0);
}

static int igafb_release(struct fb_info *info, int user)
{
        MOD_DEC_USE_COUNT;
        return(0);
}

static int igafb_update_var(int con, struct fb_info *info)
{
        return 0;
}

static int igafb_get_fix(struct fb_fix_screeninfo *fix, int con,
                         struct fb_info *info)
{
        struct fb_info_iga *fb = (struct fb_info_iga*)info;

        memset(fix, 0, sizeof(struct fb_fix_screeninfo));
        strcpy(fix->id, igafb_name);

        fix->smem_start = (char *)fb->frame_buffer;
        fix->smem_len = fb->total_vram;
        fix->xpanstep = 0;
        fix->ypanstep = 0;
        fix->ywrapstep = 0;

	fix->type = FB_TYPE_PACKED_PIXELS;
	fix->type_aux = 0;
	fix->line_length = default_var.xres * (default_var.bits_per_pixel/8);
	fix->visual = default_var.bits_per_pixel <= 8 ? FB_VISUAL_PSEUDOCOLOR
		                                      : FB_VISUAL_DIRECTCOLOR;
        return 0;
}

static int igafb_get_var(struct fb_var_screeninfo *var, int con,
                         struct fb_info *info)
{
        if(con == -1)
                memcpy(var, &default_var, sizeof(struct fb_var_screeninfo));
        else
                *var = fb_display[con].var;
        return 0;
}

static int igafb_set_var(struct fb_var_screeninfo *var, int con,
                         struct fb_info *info)
{
        memcpy(var, &default_var, sizeof(struct fb_var_screeninfo));
        return 0;
}

#ifdef __sparc__
static int igafb_mmap(struct fb_info *info, struct file *file,
		      struct vm_area_struct *vma)
{
	struct fb_info_iga *fb = (struct fb_info_iga *)info;
	unsigned int size, page, map_size = 0;
	unsigned long map_offset = 0;
	int i;

	if (!fb->mmap_map)
		return -ENXIO;

	size = vma->vm_end - vma->vm_start;
	if (vma->vm_offset & ~PAGE_MASK)
		return -ENXIO;

	/* To stop the swapper from even considering these pages. */
	vma->vm_flags |= (VM_SHM | VM_LOCKED);

	/* Each page, see which map applies */
	for (page = 0; page < size; ) {
		map_size = 0;
		for (i = 0; fb->mmap_map[i].size; i++) {
			unsigned long start = fb->mmap_map[i].voff;
			unsigned long end = start + fb->mmap_map[i].size;
			unsigned long offset = vma->vm_offset + page;

			if (start > offset)
				continue;
			if (offset >= end)
				continue;

			map_size = fb->mmap_map[i].size - (offset - start);
			map_offset = fb->mmap_map[i].poff + (offset - start);
			break;
		}
		if (!map_size) {
			page += PAGE_SIZE;
			continue;
		}
		if (page + map_size > size)
			map_size = size - page;

		pgprot_val(vma->vm_page_prot) &= ~(fb->mmap_map[i].prot_mask);
		pgprot_val(vma->vm_page_prot) |= fb->mmap_map[i].prot_flag;

		if (remap_page_range(vma->vm_start + page, map_offset,
				     map_size, vma->vm_page_prot))
			return -EAGAIN;

		page += map_size;
	}

	if (!map_size)
		return -EINVAL;

	vma->vm_flags |= VM_IO;

	if (!fb->mmaped) {
		int lastconsole = 0;

		if (info->display_fg)
			lastconsole = info->display_fg->vc_num;
		fb->mmaped = 1;
		if (fb->consolecnt && fb_display[lastconsole].fb_info ==info) {
			fb->vtconsole = lastconsole;
			vt_cons[lastconsole]->vc_mode = KD_GRAPHICS;
		}
	}
	return 0;
}
#endif /* __sparc__ */


static int iga_getcolreg(unsigned regno, unsigned *red, unsigned *green,
                          unsigned *blue, unsigned *transp,
                          struct fb_info *fb_info)
{
        /*
         *  Read a single color register and split it into colors/transparent.
         *  Return != 0 for invalid regno.
         */
	struct fb_info_iga *info = (struct fb_info_iga*) fb_info;

        if (regno >= info->video_cmap_len)
                return 1;

	*red    = info->palette[regno].red;
	*green  = info->palette[regno].green;
	*blue   = info->palette[regno].blue;
	*transp = 0;
	return 0;
}

static int iga_setcolreg(unsigned regno, unsigned red, unsigned green,
                          unsigned blue, unsigned transp,
                          struct fb_info *fb_info)
{
        /*
         *  Set a single color register. The values supplied are
         *  already rounded down to the hardware's capabilities
         *  (according to the entries in the `var' structure). Return
         *  != 0 for invalid regno.
         */
        
	struct fb_info_iga *info = (struct fb_info_iga*) fb_info;

        if (regno >= info->video_cmap_len)
                return 1;

        info->palette[regno].red   = red;
        info->palette[regno].green = green;
        info->palette[regno].blue  = blue;
        
	pci_outb(info, regno, DAC_W_INDEX);
	pci_outb(info, red,   DAC_DATA);
	pci_outb(info, green, DAC_DATA);
	pci_outb(info, blue,  DAC_DATA);

	if (regno << 16)
		switch (default_var.bits_per_pixel) {
#ifdef FBCON_HAS_CFB16
		case 16:
			info->fbcon_cmap.cfb16[regno] = 
				(regno << 10) | (regno << 5) | regno;
			break;
#endif
#ifdef FBCON_HAS_CFB24
		case 24:
			info->fbcon_cmap.cfb24[regno] = 
				(regno << 16) | (regno << 8) | regno;
		break;
#endif
#ifdef FBCON_HAS_CFB32
		case 32:
			i = (regno << 8) | regno;
			info->fbcon_cmap.cfb32[regno] = (i << 16) | i;
			break;
#endif
		}
	return 0;
}

static void do_install_cmap(int con, struct fb_info *fb_info)
{
	struct fb_info_iga *info = (struct fb_info_iga*) fb_info;

        if (con != info->currcon)
                return;
        if (fb_display[con].cmap.len)
                fb_set_cmap(&fb_display[con].cmap, 1,
                            iga_setcolreg, &info->fb_info);
        else
                fb_set_cmap(fb_default_cmap(info->video_cmap_len), 1, 
			    iga_setcolreg, &info->fb_info);
}

static int igafb_get_cmap(struct fb_cmap *cmap, int kspc, int con,
                           struct fb_info *fb_info)
{
	struct fb_info_iga *info = (struct fb_info_iga*) fb_info;
	
        if (con == info->currcon) /* current console? */
                return fb_get_cmap(cmap, kspc, iga_getcolreg, &info->fb_info);
        else if (fb_display[con].cmap.len) /* non default colormap? */
                fb_copy_cmap(&fb_display[con].cmap, cmap, kspc ? 0 : 2);
        else
                fb_copy_cmap(fb_default_cmap(info->video_cmap_len),
                     cmap, kspc ? 0 : 2);
        return 0;
}

static int igafb_set_cmap(struct fb_cmap *cmap, int kspc, int con,
	                  struct fb_info *info)
{
        int err;
	struct fb_info_iga *fb = (struct fb_info_iga*) info;

        if (!fb_display[con].cmap.len) {        /* no colormap allocated? */
                err = fb_alloc_cmap(&fb_display[con].cmap,
				    fb->video_cmap_len,0);
                if (err)
                        return err;
        }
        if (con == fb->currcon)                     /* current console? */
                return fb_set_cmap(cmap, kspc, iga_setcolreg, info);
        else
                fb_copy_cmap(cmap, &fb_display[con].cmap, kspc ? 0 : 1);
        return 0;
}

static int igafb_pan_display(struct fb_var_screeninfo *var, int con,
                             struct fb_info *info)
{
        /* no panning */
        return -EINVAL;
}

static int igafb_ioctl(struct inode *inode, struct file *file, u_int cmd,
		       u_long arg, int con, struct fb_info *info)
{
	return -EINVAL;
}

/*
 * Framebuffer option structure
 */
static struct fb_ops igafb_ops = {
    igafb_open, 
    igafb_release, 
    igafb_get_fix, 
    igafb_get_var, 
    igafb_set_var,
    igafb_get_cmap, 
    igafb_set_cmap, 
    igafb_pan_display, 
    igafb_ioctl,
#ifdef __sparc__
    igafb_mmap
#else
    NULL
#endif
};

static void igafb_set_disp(int con, struct fb_info_iga *info)
{
        struct fb_fix_screeninfo fix;
        struct display *display;
        struct display_switch *sw;
        
        if (con >= 0)
                display = &fb_display[con];
        else 
                display = &info->disp;        /* used during initialization */

        igafb_get_fix(&fix, con, &info->fb_info);

        memset(display, 0, sizeof(struct display));
        display->screen_base = (char*)info->frame_buffer;
        display->visual = fix.visual;
        display->type = fix.type;
        display->type_aux = fix.type_aux;
        display->ypanstep = fix.ypanstep;
        display->ywrapstep = fix.ywrapstep;
        display->line_length = fix.line_length;
        display->next_line = fix.line_length;
        display->can_soft_blank = 0; 
        display->inverse = 0;
        igafb_get_var(&display->var, -1, &info->fb_info);

        switch (default_var.bits_per_pixel) {
#ifdef FBCON_HAS_CFB8
        case 8:
                sw = &fbcon_cfb8;
                break;
#endif
#ifdef FBCON_HAS_CFB16
        case 15:
        case 16:
                sw = &fbcon_cfb16;
		display->dispsw_data = fbcon_cmap.cfb16;
                break;
#endif
#ifdef FBCON_HAS_CFB24
	case 24:
		sw = &fbcon_cfb24;
		display->dispsw_data = fbcon_cmap.cfb24;
		break;
#endif
#ifdef FBCON_HAS_CFB32
        case 32:
                sw = &fbcon_cfb32;
		display->dispsw_data = fbcon_cmap.cfb32;
                break;
#endif
        default:
                return;
        }
        memcpy(&info->dispsw, sw, sizeof(*sw));
        display->dispsw = &info->dispsw;

	display->scrollmode = SCROLL_YREDRAW;
	info->dispsw.bmove = fbcon_redraw_bmove;
}

static int igafb_switch(int con, struct fb_info *fb_info)
{
	struct fb_info_iga *info = (struct fb_info_iga*) fb_info;
	
        /* Do we have to save the colormap? */
        if (fb_display[info->currcon].cmap.len)
                fb_get_cmap(&fb_display[info->currcon].cmap, 1,
                            iga_getcolreg, fb_info);
        
        info->currcon = con;
        /* Install new colormap */
        do_install_cmap(con, fb_info);
	igafb_update_var(con, fb_info);
        return 1;
}



/* 0 unblank, 1 blank, 2 no vsync, 3 no hsync, 4 off */

static void igafb_blank(int blank, struct fb_info *info)
{
        /* Not supported */
}


__initfunc(static int iga_init(struct fb_info_iga *info))
{
        char vramsz = iga_inb(info, IGA_EXT_CNTRL, IGA_IDX_EXT_BUS_CNTL) 
		                                         & MEM_SIZE_ALIAS;
        switch (vramsz) {
        case MEM_SIZE_1M:
                info->total_vram = 0x100000;
                break;
        case MEM_SIZE_2M:
                info->total_vram = 0x200000;
                break;
        case MEM_SIZE_4M:
        case MEM_SIZE_RESERVED:
                info->total_vram = 0x400000;
                break;
        }

        if (default_var.bits_per_pixel > 8) {
                info->video_cmap_len = 16;
        } else {
		int i, j;
                for(i = 0; i < 16; i++) {
                        j = color_table[i];
                        info->palette[i].red   = default_red[j];
                        info->palette[i].green = default_grn[j];
                        info->palette[i].blue  = default_blu[j];
                }
                info->video_cmap_len = 256;
        }

	strcpy(info->fb_info.modename, igafb_name);
	info->fb_info.node = -1;
	info->fb_info.fbops = &igafb_ops;
	info->fb_info.disp = &info->disp;
	strcpy(info->fb_info.fontname, fontname);
	info->fb_info.changevar = NULL;
	info->fb_info.switch_con = &igafb_switch;
	info->fb_info.updatevar = &igafb_update_var;
	info->fb_info.blank = &igafb_blank;
	info->fb_info.flags=FBINFO_FLAG_DEFAULT;

	{
		int j, k;
		for (j = 0; j < 16; j++) {
			k = color_table[j];
			info->palette[j].red = default_red[k];
			info->palette[j].green = default_grn[k];
			info->palette[j].blue = default_blu[k];
		}
	}

	igafb_set_disp(-1, info);

	if (register_framebuffer(&info->fb_info) < 0)
		return 0;

	printk("fb%d: %s frame buffer device at 0x%08lx [%dMB VRAM]\n",
	       GET_FB_IDX(info->fb_info.node), igafb_name, 
	       info->frame_buffer_phys, info->total_vram >> 20);

	iga_blank_border(info); 
	return 1;
}	


__initfunc(void igafb_init(void))
{
        struct pci_dev *pdev;
        struct fb_info_iga *info;
        unsigned long addr;
        extern int con_is_present(void);
	int iga2000 = 0;

        /* Do not attach when we have a serial console. */
        if (!con_is_present())
                return;

        pdev = pci_find_device(PCI_VENDOR_ID_INTERG, 
                               PCI_DEVICE_ID_INTERG_1682, 0);
	if (pdev == NULL) {
        	pdev = pci_find_device(PCI_VENDOR_ID_INTERG, 
                               0x2000, 0);
        	if(pdev == NULL)
        	        return;
		iga2000 = 1;
	}

        info = kmalloc(sizeof(struct fb_info_iga), GFP_ATOMIC);
        if (!info) {
                printk("igafb_init: can't alloc fb_info_iga\n");
                return;
        }
        memset(info, 0, sizeof(struct fb_info_iga));

	info->frame_buffer = pdev->base_address[0];
	if (!info->frame_buffer) {
		kfree(info);
		return;
	}

        pcibios_read_config_dword(0, pdev->devfn,
                                  PCI_BASE_ADDRESS_0, 
                                  (unsigned int*)&addr);
	if (!addr)
		return;
	info->frame_buffer_phys = addr & PCI_BASE_ADDRESS_MEM_MASK;

#ifdef __sparc__

	info->io_base_phys = info->frame_buffer_phys;

	/*
	 * The right test would be to look if there is a base I/O address.
	 * But it appears that IGA 1682 reuses _memory_ address as a base
	 * for I/O accesses.
	 */
	if (iga2000) {
		info->io_base = (int) sparc_alloc_io(info->frame_buffer_phys |
		    0x00800000, NULL, 0x1000, "iga", 0, 0);
	} else {
		/* Obtain virtual address and correct physical by PCIC shift */
		info->io_base = pcic_alloc_io(&info->io_base_phys);
	}
	if (!info->io_base) {
                kfree(info);
		return;
	}

	/*
	 * Figure mmap addresses from PCI config space.
	 * We need two regions: for video memory and for I/O ports.
	 * Later one can add region for video coprocessor registers.
	 * However, mmap routine loops until size != 0, so we put
	 * one additional region with size == 0. 
	 */

	info->mmap_map = kmalloc(4 * sizeof(*info->mmap_map), GFP_ATOMIC);
	if (!info->mmap_map) {
                printk("igafb_init: can't alloc mmap_map\n");
		/* XXX Here we left I/O allocated */
                kfree(info);
		return;
	}

	memset(info->mmap_map, 0, 4 * sizeof(*info->mmap_map));

	/*
	 * Set default vmode and cmode from PROM properties.
	 */
	{
                struct pcidev_cookie *cookie = pdev->sysdata;
                int node = cookie->prom_node;
                int width = prom_getintdefault(node, "width", 1024);
                int height = prom_getintdefault(node, "height", 768);
                int depth = prom_getintdefault(node, "depth", 8);
                switch (width) {
                    case 1024:
                        if (height == 768)
                            default_var = default_var_1024x768;
                        break;
                    case 1152:
                        if (height == 900)
                            default_var = default_var_1152x900;
                        break;
                    case 1280:
                        if (height == 1024)
                            default_var = default_var_1280x1024;
                        break;
                    default:
                        break;
                }

                switch (depth) {
                    case 8:
                        default_var.bits_per_pixel = 8;
                        break;
                    case 16:
                        default_var.bits_per_pixel = 16;
                        break;
                    case 24:
                        default_var.bits_per_pixel = 24;
                        break;
                    case 32:
                        default_var.bits_per_pixel = 32;
                        break;
                    default:
                        break;
                }
            }

#endif
        if (!iga_init(info)) {
		if (info->mmap_map)
			kfree(info->mmap_map);
		kfree(info);
        }

#ifdef __sparc__
	    /*
	     * Add /dev/fb mmap values.
	     */
	    
	    /* First region is for video memory */
	    info->mmap_map[0].voff = 0x0;  
	    info->mmap_map[0].poff = info->frame_buffer_phys & PAGE_MASK;
	    info->mmap_map[0].size = info->total_vram   & PAGE_MASK;
	    info->mmap_map[0].prot_mask = SRMMU_CACHE;
	    info->mmap_map[0].prot_flag = SRMMU_WRITE;

	    /* Second region is for I/O ports */
	    info->mmap_map[1].voff = info->frame_buffer_phys & PAGE_MASK;
	    info->mmap_map[1].poff = info->io_base_phys & PAGE_MASK;
	    info->mmap_map[1].size = PAGE_SIZE * 2; /* X wants 2 pages */
	    info->mmap_map[1].prot_mask = SRMMU_CACHE;
	    info->mmap_map[1].prot_flag = SRMMU_WRITE;
#endif /* __sparc__ */
}

__initfunc(void igafb_setup(char *options, int *ints))
{
    char *this_opt;

    if (!options || !*options)
        return;

    for (this_opt = strtok(options, ","); this_opt;
         this_opt = strtok(NULL, ",")) {
        if (!strncmp(this_opt, "font:", 5)) {
                char *p;
                int i;

                p = this_opt + 5;
                for (i = 0; i < sizeof(fontname) - 1; i++)
                        if (!*p || *p == ' ' || *p == ',')
                                break;
                memcpy(fontname, this_opt + 5, i);
                fontname[i] = 0;
        }
    }
}