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/* $Id: bwtwo.c,v 1.16 1997/06/04 08:27:26 davem Exp $
* bwtwo.c: bwtwo console driver
*
* Copyright (C) 1996 Miguel de Icaza (miguel@nuclecu.unam.mx)
* Copyright (C) 1997 Eddie C. Dost (ecd@skynet.be)
*/
#include <linux/kd.h>
#include <linux/tty.h>
#include <linux/malloc.h>
#include <linux/proc_fs.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"
/* OBio addresses for the bwtwo registers */
#define BWTWO_REGISTER_OFFSET 0x400000
struct bwtwo_regs {
__volatile__ 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
/* 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 int
bwtwo_mmap (struct inode *inode, struct file *file, struct vm_area_struct *vma,
long base, fbinfo_t *fb)
{
uint size, map_offset, r;
int map_size;
map_size = 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;
/* This routine should also map the register if asked for,
* but we don't do that yet.
*/
map_offset = get_phys ((unsigned long) fb->base);
r = io_remap_page_range (vma->vm_start, map_offset, map_size,
vma->vm_page_prot, fb->space);
if (r) return -EAGAIN;
vma->vm_inode = inode;
atomic_inc(&inode->i_count);
return 0;
}
static void
bwtwo_blank (fbinfo_t *fb)
{
fb->info.bwtwo.regs->control &= ~BWTWO_CTL_ENABLE_VIDEO;
}
static void
bwtwo_unblank (fbinfo_t *fb)
{
fb->info.bwtwo.regs->control |= BWTWO_CTL_ENABLE_VIDEO;
}
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
};
__initfunc(void bwtwo_setup (fbinfo_t *fb, int slot, u32 bwtwo, int bw2_io,
struct linux_sbus_device *sbdp))
{
printk ("bwtwo%d at 0x%8.8x\n", slot, bwtwo);
fb->type.fb_cmsize = 0;
fb->mmap = bwtwo_mmap;
fb->loadcmap = 0;
fb->ioctl = 0;
fb->reset = 0;
fb->blank = bwtwo_blank;
fb->unblank = bwtwo_unblank;
fb->info.bwtwo.regs =
sparc_alloc_io (bwtwo + BWTWO_REGISTER_OFFSET,
0, sizeof (struct bwtwo_regs),
"bwtwo_regs", bw2_io, 0);
if (!prom_getbool(sbdp->prom_node, "width")) {
/* Ugh, broken PROM didn't initialize us.
* Let's deal with this ourselves.
*/
u8 status, mon;
u8 *p;
status = fb->info.bwtwo.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;
} 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;
default:
prom_printf("bwtwo: can't handle SR %02x\n",
status);
prom_halt();
return; /* fool gcc. */
}
for ( ; *p; p += 2)
((u8 *)fb->info.bwtwo.regs)[p[0]] = p[1];
}
if(!fb->base)
fb->base = (unsigned long) sparc_alloc_io(bwtwo, 0,
((fb->type.fb_depth*fb->type.fb_height*fb->type.fb_width)/8),
"bwtwo_fbase", bw2_io, 0);
if (slot && sun_prom_console_id != slot)
bwtwo_blank (fb);
}
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