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/* $Id: weitek.c,v 1.15 1997/07/22 06:14:11 davem Exp $
* weitek.c: Tadpole P9100/P9000 console driver
*
* Copyright (C) 1996 David Redman (djhr@tadpole.co.uk)
*/
#include <linux/kd.h>
#include <linux/tty.h>
#include <linux/malloc.h>
#include <linux/proc_fs.h>
#include <asm/openprom.h>
#include <asm/sbus.h>
#include <asm/io.h>
#include <asm/fbio.h>
#include <asm/pgtable.h>
/* These must be included after asm/fbio.h */
#include <linux/vt_kern.h>
#include <linux/selection.h>
#include <linux/console_struct.h>
#include "fb.h"
#include "cg_common.h"
/*
* mmap info
*/
#define WEITEK_VRAM_OFFSET 0
#define WEITEK_VRAM_SIZE (2*1024*1024) /* maximum */
#define WEITEK_GX_REG_OFFSET WEITEK_VRAM_SIZE
#define WEITEK_GX_REG_SIZE 8192
#define WEITEK_VID_REG_OFFSET (WEITEK_GX_REG_OFFSET+WEITEK_GX_REG_SIZE)
#define WEITEK_VID_REG_SIZE 0x1000
#define CONTROL_OFFSET 0
#define RAMDAC_OFFSET (CONTROL_OFFSET+0x200)
#if 0
static int
weitek_mmap(struct inode *inode, struct file *file, struct vm_area_struct *vma,
long base, fbinfo_t *fb)
{
unsigned int size, page, r, map_size;
unsigned long map_offset = 0;
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 |= FB_MMAP_VM_FLAGS;
/* Each page, see which map applies */
for (page = 0; page < size; ){
switch (vma->vm_offset+page){
case WEITEK_VRAM_OFFSET:
map_size = size-page;
map_offset = get_phys ((unsigned long) fb->base);
if (map_size > fb->type.fb_size)
map_size = fb->type.fb_size;
break;
case WEITEK_GX_REG_OFFSET:
map_size = size-page;
map_offset = get_phys ((unsigned long) fb->base);
if (map_size > fb->type.fb_size)
map_size = fb->type.fb_size;
break;
default:
map_size = 0;
break;
}
if (!map_size){
page += PAGE_SIZE;
continue;
}
if (page + map_size > size)
map_size = size - page;
r = io_remap_page_range (vma->vm_start+page,
map_offset,
map_size, vma->vm_page_prot,
fb->space);
if (r)
return -EAGAIN;
page += map_size;
}
vma->vm_dentry = dget(file->f_dentry);
return 0;
}
#endif
#if 0
static void
weitek_loadcmap (void *fbinfo, int index, int count)
{
printk("weitek_cmap: unimplemented!\n");
}
#endif
__initfunc(void weitek_setup(fbinfo_t *fb, int slot, u32 addr, int io))
{
printk ("weitek%d at 0x%8.8x\n", slot, addr);
/* Fill in parameters we left out */
fb->type.fb_type = FBTYPE_NOTSUN1;
fb->type.fb_cmsize = 256;
fb->mmap = 0; /* weitek_mmap; */
fb->loadcmap = 0; /* unimplemented */
fb->ioctl = 0; /* no special ioctls */
fb->reset = 0; /* no special reset */
/* Map the card registers */
if (!fb->base){
prom_printf ("Missing mapping routine and no address found\n");
}
}
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