drivers/video/p9100fb.c

   1 /* $id: p9100fb.c,v 1.4 1999/08/18 10:55:01 shadow Exp $
   2  * p9100fb.c: P9100 frame buffer driver
   3  *
   4  * Copyright 1999 Derrick J Brashear (shadow@dementia.org)
   5  */
   6
   7 #include <linux/module.h>
   8 #include <linux/sched.h>
   9 #include <linux/kernel.h>
  10 #include <linux/errno.h>
  11 #include <linux/string.h>
  12 #include <linux/mm.h>
  13 #include <linux/tty.h>
  14 #include <linux/malloc.h>
  15 #include <linux/vmalloc.h>
  16 #include <linux/delay.h>
  17 #include <linux/interrupt.h>
  18 #include <linux/fb.h>
  19 #include <linux/init.h>
  20 #include <linux/selection.h>
  21
  22 #include <video/sbusfb.h>
  23 #include <asm/io.h>
  24
  25 #include <video/fbcon-cfb8.h>
  26
  27 #include "p9100.h"
  28
  29 static struct sbus_mmap_map p9100_mmap_map[] = {
  30 #if 0 /* For now, play we're a dumb color fb */
  31   { P9100_CTL_OFF, 0x38000000, 0x2000 },
  32   { P9100_CMD_OFF, 0x38002000, 0x2000 },
  33   { P9100_FB_OFF, 0x38800000, 0x200000 },
  34   { CG3_MMAP_OFFSET, 0x38800000, SBUS_MMAP_FBSIZE(1) },
  35 #else
  36   { CG3_MMAP_OFFSET, 0x0, SBUS_MMAP_FBSIZE(1) },
  37 #endif
  38   { 0, 0, 0 }
  39 };
  40
  41 #define _READCTL(member, out) \
  42 { \
  43   struct p9100_ctrl *actual; \
  44   actual = (struct p9100_ctrl *)fb->s.p9100.ctrl; \
  45   out = sbus_readl(&actual-> ## member ); \
  46 }
  47
  48 #define READCTL(member, out) \
  49 { \
  50   struct p9100_ctrl *enab, *actual; \
  51   actual = (struct p9100_ctrl *)fb->s.p9100.ctrl; \
  52   enab = (struct p9100_ctrl *)fb->s.p9100.fbmem; \
  53   out = sbus_readl(&enab-> ## member ); \
  54   out = sbus_readl(&actual-> ## member ); \
  55 }
  56
  57 #define WRITECTL(member, val) \
  58 { \
  59   u32 __writetmp; \
  60   struct p9100_ctrl *enab, *actual; \
  61   actual = (struct p9100_ctrl *)fb->s.p9100.ctrl; \
  62   enab = (struct p9100_ctrl *)fb->s.p9100.fbmem; \
  63   __writetmp = sbus_readl(&enab-> ## member ); \
  64   sbus_writel(val, &actual-> ## member ); \
  65 }
  66
  67 static void p9100_loadcmap (struct fb_info_sbusfb *fb, struct display *p, int index, int count)
  68 {
  69         unsigned long flags;
  70         u32 tmp;
  71         int i;
  72
  73         spin_lock_irqsave(&fb->lock, flags);
  74
  75         _READCTL(pwrup_cfg, tmp);
  76         WRITECTL(ramdac_cmap_wridx, (index << 16));
  77
  78         for (i = index; count--; i++){
  79                 _READCTL(pwrup_cfg, tmp);
  80                 WRITECTL(ramdac_palette_data, (fb->color_map CM(i,0) << 16));
  81                 _READCTL(pwrup_cfg, tmp);
  82                 WRITECTL(ramdac_palette_data, (fb->color_map CM(i,1) << 16));
  83                 _READCTL(pwrup_cfg, tmp);
  84                 WRITECTL(ramdac_palette_data, (fb->color_map CM(i,2) << 16));
  85         }
  86
  87         spin_unlock_irqrestore(&fb->lock, flags);
  88 }
  89
  90 static void p9100_blank (struct fb_info_sbusfb *fb)
  91 {
  92         unsigned long flags;
  93         u32 val;
  94
  95         spin_lock_irqsave(&fb->lock, flags);
  96         READCTL(vid_screenpaint_timectl1, val);
  97         val &= ~ SCREENPAINT_TIMECTL1_ENABLE_VIDEO;
  98         WRITECTL(vid_screenpaint_timectl1, val);
  99         spin_unlock_irqrestore(&fb->lock, flags);
 100 }
 101
 102 static void p9100_unblank (struct fb_info_sbusfb *fb)
 103 {
 104         unsigned long flags;
 105         u32 val;
 106
 107         spin_lock_irqsave(&fb->lock, flags);
 108         READCTL(vid_screenpaint_timectl1, val);
 109         val |= SCREENPAINT_TIMECTL1_ENABLE_VIDEO;
 110         WRITECTL(vid_screenpaint_timectl1, val);
 111         spin_unlock_irqrestore(&fb->lock, flags);
 112 }
 113
 114 static void p9100_margins (struct fb_info_sbusfb *fb, struct display *p, int x_margin, int y_margin)
 115 {
 116   p->screen_base += (y_margin - fb->y_margin) * p->line_length +
 117     (x_margin - fb->x_margin);
 118 }
 119
 120 static char idstring[60] __initdata = { 0 };
 121
 122 char * __init p9100fb_init(struct fb_info_sbusfb *fb)
 123 {
 124         struct fb_fix_screeninfo *fix = &fb->fix;
 125         struct display *disp = &fb->disp;
 126         struct fbtype *type = &fb->type;
 127         struct sbus_dev *sdev = fb->sbdp;
 128         unsigned long phys = sdev->reg_addrs[2].phys_addr;
 129         int tmp;
 130
 131 #ifndef FBCON_HAS_CFB8
 132         return NULL;
 133 #endif
 134
 135         /* Control regs: fb->sbdp->reg_addrs[0].phys_addr
 136          * Command regs: fb->sbdp->reg_addrs[1].phys_addr
 137          * Frame buffer: fb->sbdp->reg_addrs[2].phys_addr
 138          */
 139
 140         if (!fb->s.p9100.ctrl) {
 141                 fb->s.p9100.ctrl = (struct p9100_ctrl *)
 142                         sbus_ioremap(&sdev->resource[0], 0,
 143                                      sdev->reg_addrs[0].reg_size, "p9100 ctrl");
 144         }
 145
 146         strcpy(fb->info.modename, "p9100");
 147         strcpy(fix->id, "p9100");
 148         fix->accel = FB_ACCEL_SUN_CGTHREE;
 149         fix->line_length = fb->var.xres_virtual;
 150
 151         disp->scrollmode = SCROLL_YREDRAW;
 152         if (!disp->screen_base)
 153                 disp->screen_base = (char *)
 154                         sbus_ioremap(&sdev->resource[2], 0,
 155                                      type->fb_size, "p9100 ram");
 156         fb->s.p9100.fbmem = (volatile u32 *)disp->screen_base;
 157         disp->screen_base += fix->line_length * fb->y_margin + fb->x_margin;
 158
 159         READCTL(sys_config, tmp);
 160         switch ((tmp >> SYS_CONFIG_PIXELSIZE_SHIFT) & 7) {
 161         case 7:
 162           type->fb_depth = 24;
 163           break;
 164         case 5:
 165           type->fb_depth = 32;
 166           break;
 167         case 3:
 168           type->fb_depth = 16;
 169           break;
 170         case 2:
 171           type->fb_depth = 8;
 172           break;
 173         default:
 174           printk("p9100: screen depth unknown: 0x%x", tmp);
 175           return NULL;
 176         }
 177
 178         fb->dispsw = fbcon_cfb8;
 179
 180         fb->margins = p9100_margins;
 181         fb->loadcmap = p9100_loadcmap;
 182         fb->blank = p9100_blank;
 183         fb->unblank = p9100_unblank;
 184
 185         fb->physbase = phys;
 186         fb->mmap_map = p9100_mmap_map;
 187
 188         sprintf(idstring, "%s at 0x%x", "p9100",
 189                 (unsigned int)disp->screen_base);
 190
 191         return idstring;
 192 }
 193