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/* $Id: bwtwofb.c,v 1.11 1999/11/19 09:56:54 davem Exp $
* bwtwofb.c: BWtwo frame buffer driver
*
* Copyright (C) 1998 Jakub Jelinek (jj@ultra.linux.cz)
* Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx)
* Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be)
* Copyright (C) 1998 Pavel Machek (pavel@ucw.cz)
*/
#include <linux/config.h>
#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>
#ifndef __sparc_v9__
#include <asm/sun4paddr.h>
#endif
#include <video/fbcon-mfb.h>
/* OBio addresses for the bwtwo registers */
#define BWTWO_REGISTER_OFFSET 0x400000
struct bw2_regs {
struct bt_regs bt;
volatile u8 control;
volatile u8 status;
volatile u8 cursor_start;
volatile u8 cursor_end;
volatile u8 h_blank_start;
volatile u8 h_blank_end;
volatile u8 h_sync_start;
volatile u8 h_sync_end;
volatile u8 comp_sync_end;
volatile u8 v_blank_start_high;
volatile u8 v_blank_start_low;
volatile u8 v_blank_end;
volatile u8 v_sync_start;
volatile u8 v_sync_end;
volatile u8 xfer_holdoff_start;
volatile u8 xfer_holdoff_end;
};
/* Status Register Constants */
#define BWTWO_SR_RES_MASK 0x70
#define BWTWO_SR_1600_1280 0x50
#define BWTWO_SR_1152_900_76_A 0x40
#define BWTWO_SR_1152_900_76_B 0x60
#define BWTWO_SR_ID_MASK 0x0f
#define BWTWO_SR_ID_MONO 0x02
#define BWTWO_SR_ID_MONO_ECL 0x03
#define BWTWO_SR_ID_MSYNC 0x04
#define BWTWO_SR_ID_NOCONN 0x0a
/* Control Register Constants */
#define BWTWO_CTL_ENABLE_INTS 0x80
#define BWTWO_CTL_ENABLE_VIDEO 0x40
#define BWTWO_CTL_ENABLE_TIMING 0x20
#define BWTWO_CTL_ENABLE_CURCMP 0x10
#define BWTWO_CTL_XTAL_MASK 0x0C
#define BWTWO_CTL_DIVISOR_MASK 0x03
/* Status Register Constants */
#define BWTWO_STAT_PENDING_INT 0x80
#define BWTWO_STAT_MSENSE_MASK 0x70
#define BWTWO_STAT_ID_MASK 0x0f
static struct sbus_mmap_map bw2_mmap_map[] = {
{ 0, 0, SBUS_MMAP_FBSIZE(1) },
{ 0, 0, 0 }
};
static void bw2_blank (struct fb_info_sbusfb *fb)
{
unsigned long flags;
u8 tmp;
spin_lock_irqsave(&fb->lock, flags);
tmp = sbus_readb(&fb->s.bw2.regs->control);
tmp &= ~BWTWO_CTL_ENABLE_VIDEO;
sbus_writeb(tmp, &fb->s.bw2.regs->control);
spin_unlock_irqrestore(&fb->lock, flags);
}
static void bw2_unblank (struct fb_info_sbusfb *fb)
{
unsigned long flags;
u8 tmp;
spin_lock_irqsave(&fb->lock, flags);
tmp = sbus_readb(&fb->s.bw2.regs->control);
tmp |= BWTWO_CTL_ENABLE_VIDEO;
sbus_writeb(tmp, &fb->s.bw2.regs->control);
spin_unlock_irqrestore(&fb->lock, flags);
}
static void bw2_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) >> 3);
}
static u8 bw2regs_1600[] __initdata = {
0x14, 0x8b, 0x15, 0x28, 0x16, 0x03, 0x17, 0x13,
0x18, 0x7b, 0x19, 0x05, 0x1a, 0x34, 0x1b, 0x2e,
0x1c, 0x00, 0x1d, 0x0a, 0x1e, 0xff, 0x1f, 0x01,
0x10, 0x21, 0
};
static u8 bw2regs_ecl[] __initdata = {
0x14, 0x65, 0x15, 0x1e, 0x16, 0x04, 0x17, 0x0c,
0x18, 0x5e, 0x19, 0x03, 0x1a, 0xa7, 0x1b, 0x23,
0x1c, 0x00, 0x1d, 0x08, 0x1e, 0xff, 0x1f, 0x01,
0x10, 0x20, 0
};
static u8 bw2regs_analog[] __initdata = {
0x14, 0xbb, 0x15, 0x2b, 0x16, 0x03, 0x17, 0x13,
0x18, 0xb0, 0x19, 0x03, 0x1a, 0xa6, 0x1b, 0x22,
0x1c, 0x01, 0x1d, 0x05, 0x1e, 0xff, 0x1f, 0x01,
0x10, 0x20, 0
};
static u8 bw2regs_76hz[] __initdata = {
0x14, 0xb7, 0x15, 0x27, 0x16, 0x03, 0x17, 0x0f,
0x18, 0xae, 0x19, 0x03, 0x1a, 0xae, 0x1b, 0x2a,
0x1c, 0x01, 0x1d, 0x09, 0x1e, 0xff, 0x1f, 0x01,
0x10, 0x24, 0
};
static u8 bw2regs_66hz[] __initdata = {
0x14, 0xbb, 0x15, 0x2b, 0x16, 0x04, 0x17, 0x14,
0x18, 0xae, 0x19, 0x03, 0x1a, 0xa8, 0x1b, 0x24,
0x1c, 0x01, 0x1d, 0x05, 0x1e, 0xff, 0x1f, 0x01,
0x10, 0x20, 0
};
static char idstring[60] __initdata = { 0 };
char __init *bwtwofb_init(struct fb_info_sbusfb *fb)
{
struct fb_fix_screeninfo *fix = &fb->fix;
struct display *disp = &fb->disp;
struct fbtype *type = &fb->type;
#ifdef CONFIG_SUN4
unsigned long phys = sun4_bwtwo_physaddr;
struct resource res;
#else
unsigned long phys = fb->sbdp->reg_addrs[0].phys_addr;
#endif
struct resource *resp;
unsigned int vaddr;
#ifndef FBCON_HAS_MFB
return NULL;
#endif
#ifdef CONFIG_SUN4
res.start = phys;
res.end = res.start + BWTWO_REGISTER_OFFSET + sizeof(struct bw2_regs) - 1;
res.flags = IORESOURE_IO | (fb->iospace & 0xff);
resp = &res;
#else
resp = &fb->sbdp->resource[0];
#endif
if (!fb->s.bw2.regs) {
fb->s.bw2.regs = (struct bw2_regs *)
sbus_ioremap(resp, BWTWO_REGISTER_OFFSET,
sizeof(struct bw2_regs), "bw2 regs");
if ((!ARCH_SUN4) && (!prom_getbool(fb->prom_node, "width"))) {
/* Ugh, broken PROM didn't initialize us.
* Let's deal with this ourselves.
*/
u8 status, mon;
u8 *p;
int sizechange = 0;
status = sbus_readb(&fb->s.bw2.regs->status);
mon = status & BWTWO_SR_RES_MASK;
switch (status & BWTWO_SR_ID_MASK) {
case BWTWO_SR_ID_MONO_ECL:
if (mon == BWTWO_SR_1600_1280) {
p = bw2regs_1600;
fb->type.fb_width = 1600;
fb->type.fb_height = 1280;
sizechange = 1;
} else
p = bw2regs_ecl;
break;
case BWTWO_SR_ID_MONO:
p = bw2regs_analog;
break;
case BWTWO_SR_ID_MSYNC:
if (mon == BWTWO_SR_1152_900_76_A ||
mon == BWTWO_SR_1152_900_76_B)
p = bw2regs_76hz;
else
p = bw2regs_66hz;
break;
case BWTWO_SR_ID_NOCONN:
return NULL;
default:
prom_printf("bw2: can't handle SR %02x\n",
status);
prom_halt();
return NULL; /* fool gcc. */
}
for ( ; *p; p += 2) {
u8 *regp = &((u8 *)fb->s.bw2.regs)[p[0]];
sbus_writeb(p[1], regp);
}
}
}
strcpy(fb->info.modename, "BWtwo");
strcpy(fix->id, "BWtwo");
fix->line_length = fb->var.xres_virtual >> 3;
fix->accel = FB_ACCEL_SUN_BWTWO;
disp->scrollmode = SCROLL_YREDRAW;
disp->inverse = 1;
if (!disp->screen_base) {
disp->screen_base = (char *)
sbus_ioremap(resp, 0, type->fb_size, "bw2 ram");
}
disp->screen_base += fix->line_length * fb->y_margin + (fb->x_margin >> 3);
fb->dispsw = fbcon_mfb;
fix->visual = FB_VISUAL_MONO01;
#ifndef CONFIG_SUN4
fb->blank = bw2_blank;
fb->unblank = bw2_unblank;
prom_getproperty(fb->sbdp->prom_node, "address",
(char *)&vaddr, sizeof(vaddr));
fb->physbase = __get_phys((unsigned long)vaddr);
#endif
fb->margins = bw2_margins;
fb->mmap_map = bw2_mmap_map;
#ifdef __sparc_v9__
sprintf(idstring, "bwtwo at %016lx", phys);
#else
sprintf(idstring, "bwtwo at %x.%08lx", fb->iospace, phys);
#endif
return idstring;
}
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