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/* $id: p9100fb.c,v 1.4 1999/08/18 10:55:01 shadow Exp $
* p9100fb.c: P9100 frame buffer driver
*
* Copyright 1999 Derrick J Brashear (shadow@dementia.org)
*/
#include <linux/module.h>
#include <linux/sched.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/init.h>
#include <linux/selection.h>
#include <video/sbusfb.h>
#include <asm/io.h>
#include <video/fbcon-cfb8.h>
#include "p9100.h"
static struct sbus_mmap_map p9100_mmap_map[] = {
#if 0 /* For now, play we're a dumb color fb */
{ P9100_CTL_OFF, 0x38000000, 0x2000 },
{ P9100_CMD_OFF, 0x38002000, 0x2000 },
{ P9100_FB_OFF, 0x38800000, 0x200000 },
{ CG3_MMAP_OFFSET, 0x38800000, SBUS_MMAP_FBSIZE(1) },
#else
{ CG3_MMAP_OFFSET, 0x0, SBUS_MMAP_FBSIZE(1) },
#endif
{ 0, 0, 0 }
};
#define _READCTL(member, out) \
{ \
struct p9100_ctrl *actual; \
actual = (struct p9100_ctrl *)fb->s.p9100.ctrl; \
out = sbus_readl(&actual-> ## member ); \
}
#define READCTL(member, out) \
{ \
struct p9100_ctrl *enab, *actual; \
actual = (struct p9100_ctrl *)fb->s.p9100.ctrl; \
enab = (struct p9100_ctrl *)fb->s.p9100.fbmem; \
out = sbus_readl(&enab-> ## member ); \
out = sbus_readl(&actual-> ## member ); \
}
#define WRITECTL(member, val) \
{ \
u32 __writetmp; \
struct p9100_ctrl *enab, *actual; \
actual = (struct p9100_ctrl *)fb->s.p9100.ctrl; \
enab = (struct p9100_ctrl *)fb->s.p9100.fbmem; \
__writetmp = sbus_readl(&enab-> ## member ); \
sbus_writel(val, &actual-> ## member ); \
}
static void p9100_loadcmap (struct fb_info_sbusfb *fb, struct display *p, int index, int count)
{
unsigned long flags;
u32 tmp;
int i;
spin_lock_irqsave(&fb->lock, flags);
_READCTL(pwrup_cfg, tmp);
WRITECTL(ramdac_cmap_wridx, (index << 16));
for (i = index; count--; i++){
_READCTL(pwrup_cfg, tmp);
WRITECTL(ramdac_palette_data, (fb->color_map CM(i,0) << 16));
_READCTL(pwrup_cfg, tmp);
WRITECTL(ramdac_palette_data, (fb->color_map CM(i,1) << 16));
_READCTL(pwrup_cfg, tmp);
WRITECTL(ramdac_palette_data, (fb->color_map CM(i,2) << 16));
}
spin_unlock_irqrestore(&fb->lock, flags);
}
static void p9100_blank (struct fb_info_sbusfb *fb)
{
unsigned long flags;
u32 val;
spin_lock_irqsave(&fb->lock, flags);
READCTL(vid_screenpaint_timectl1, val);
val &= ~ SCREENPAINT_TIMECTL1_ENABLE_VIDEO;
WRITECTL(vid_screenpaint_timectl1, val);
spin_unlock_irqrestore(&fb->lock, flags);
}
static void p9100_unblank (struct fb_info_sbusfb *fb)
{
unsigned long flags;
u32 val;
spin_lock_irqsave(&fb->lock, flags);
READCTL(vid_screenpaint_timectl1, val);
val |= SCREENPAINT_TIMECTL1_ENABLE_VIDEO;
WRITECTL(vid_screenpaint_timectl1, val);
spin_unlock_irqrestore(&fb->lock, flags);
}
static void p9100_margins (struct fb_info_sbusfb *fb, struct display *p, int x_margin, int y_margin)
{
p->screen_base += (y_margin - fb->y_margin) * p->line_length +
(x_margin - fb->x_margin);
}
static char idstring[60] __initdata = { 0 };
char * __init p9100fb_init(struct fb_info_sbusfb *fb)
{
struct fb_fix_screeninfo *fix = &fb->fix;
struct display *disp = &fb->disp;
struct fbtype *type = &fb->type;
struct sbus_dev *sdev = fb->sbdp;
unsigned long phys = sdev->reg_addrs[2].phys_addr;
int tmp;
#ifndef FBCON_HAS_CFB8
return NULL;
#endif
/* Control regs: fb->sbdp->reg_addrs[0].phys_addr
* Command regs: fb->sbdp->reg_addrs[1].phys_addr
* Frame buffer: fb->sbdp->reg_addrs[2].phys_addr
*/
if (!fb->s.p9100.ctrl) {
fb->s.p9100.ctrl = (struct p9100_ctrl *)
sbus_ioremap(&sdev->resource[0], 0,
sdev->reg_addrs[0].reg_size, "p9100 ctrl");
}
strcpy(fb->info.modename, "p9100");
strcpy(fix->id, "p9100");
fix->accel = FB_ACCEL_SUN_CGTHREE;
fix->line_length = fb->var.xres_virtual;
disp->scrollmode = SCROLL_YREDRAW;
if (!disp->screen_base)
disp->screen_base = (char *)
sbus_ioremap(&sdev->resource[2], 0,
type->fb_size, "p9100 ram");
fb->s.p9100.fbmem = (volatile u32 *)disp->screen_base;
disp->screen_base += fix->line_length * fb->y_margin + fb->x_margin;
READCTL(sys_config, tmp);
switch ((tmp >> SYS_CONFIG_PIXELSIZE_SHIFT) & 7) {
case 7:
type->fb_depth = 24;
break;
case 5:
type->fb_depth = 32;
break;
case 3:
type->fb_depth = 16;
break;
case 2:
type->fb_depth = 8;
break;
default:
printk("p9100: screen depth unknown: 0x%x", tmp);
return NULL;
}
fb->dispsw = fbcon_cfb8;
fb->margins = p9100_margins;
fb->loadcmap = p9100_loadcmap;
fb->blank = p9100_blank;
fb->unblank = p9100_unblank;
fb->physbase = phys;
fb->mmap_map = p9100_mmap_map;
sprintf(idstring, "%s at 0x%x", "p9100",
(unsigned int)disp->screen_base);
return idstring;
}
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