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-rw-r--r--chips/bt459.c384
1 files changed, 0 insertions, 384 deletions
diff --git a/chips/bt459.c b/chips/bt459.c
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--- a/chips/bt459.c
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@@ -1,384 +0,0 @@
-/*
- * Mach Operating System
- * Copyright (c) 1991,1990,1989 Carnegie Mellon University
- * All Rights Reserved.
- *
- * Permission to use, copy, modify and distribute this software and its
- * documentation is hereby granted, provided that both the copyright
- * notice and this permission notice appear in all copies of the
- * software, derivative works or modified versions, and any portions
- * thereof, and that both notices appear in supporting documentation.
- *
- * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
- * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
- * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
- *
- * Carnegie Mellon requests users of this software to return to
- *
- * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU
- * School of Computer Science
- * Carnegie Mellon University
- * Pittsburgh PA 15213-3890
- *
- * any improvements or extensions that they make and grant Carnegie Mellon
- * the rights to redistribute these changes.
- */
-/*
- * File: bt459.c
- * Author: Alessandro Forin, Carnegie Mellon University
- * Date: 9/90
- *
- * Routines for the bt459 RAMDAC
- */
-
-#include <platforms.h>
-
-#include <chips/bt459.h>
-#include <chips/screen.h>
-
-#ifdef DECSTATION
-
-typedef struct {
- volatile unsigned char addr_lo;
- char pad0[3];
- volatile unsigned char addr_hi;
- char pad1[3];
- volatile unsigned char addr_reg;
- char pad2[3];
- volatile unsigned char addr_cmap;
- char pad3[3];
-} bt459_ds_padded_regmap_t;
-#define bt459_padded_regmap_t bt459_ds_padded_regmap_t
-
-#define mb() /* no write/read reordering problems */
-
-#endif /* DECSTATION */
-
-#ifdef FLAMINGO
-
-/* Sparse space ! */
-typedef struct {
- volatile unsigned int addr_lo;
- int pad0;
- volatile unsigned int addr_hi;
- int pad1;
- volatile unsigned int addr_reg;
- int pad2;
- volatile unsigned int addr_cmap;
- int pad3;
-} bt459_fl_padded_regmap_t;
-#define bt459_padded_regmap_t bt459_fl_padded_regmap_t
-
-#define mb() wbflush()
-
-#endif /* FLAMINGO */
-
-
-#ifndef bt459_padded_regmap_t
-typedef bt459_regmap_t bt459_padded_regmap_t;
-#define wbflush()
-#endif
-
-/*
- * Generic register access
- */
-#define bt459_select_reg_macro(r,n) \
- (r)->addr_lo = (n); mb(); \
- (r)->addr_hi = (n) >> 8; \
- wbflush();
-
-void
-bt459_select_reg(
- bt459_padded_regmap_t *regs,
- int regno)
-{
- bt459_select_reg_macro( regs, regno);
-}
-
-void
-bt459_write_reg(
- bt459_padded_regmap_t *regs,
- int regno,
- unsigned char val)
-{
- bt459_select_reg_macro( regs, regno );
- regs->addr_reg = val;
- wbflush();
-}
-
-unsigned char
-bt459_read_reg(
- bt459_padded_regmap_t *regs,
- int regno)
-{
- bt459_select_reg_macro( regs, regno );
- return regs->addr_reg;
-}
-
-
-/*
- * Color map
- */
-bt459_load_colormap_entry(
- bt459_padded_regmap_t *regs,
- int entry,
- color_map_t *map)
-{
- bt459_select_reg(regs, entry & 0xff);
-
- regs->addr_cmap = map->red;
- wbflush();
- regs->addr_cmap = map->green;
- wbflush();
- regs->addr_cmap = map->blue;
- wbflush();
-}
-
-bt459_init_colormap(
- bt459_padded_regmap_t *regs)
-{
- register int i;
-
- bt459_select_reg(regs, 0);
- regs->addr_cmap = 0;
- wbflush();
- regs->addr_cmap = 0;
- wbflush();
- regs->addr_cmap = 0;
- wbflush();
-
- regs->addr_cmap = 0xff;
- wbflush();
- regs->addr_cmap = 0xff;
- wbflush();
- regs->addr_cmap = 0xff;
- wbflush();
-
- bt459_select_reg(regs, 255);
- regs->addr_cmap = 0xff;
- wbflush();
- regs->addr_cmap = 0xff;
- wbflush();
- regs->addr_cmap = 0xff;
- wbflush();
-
-}
-
-#if 1/*debug*/
-bt459_print_colormap(
- bt459_padded_regmap_t *regs)
-{
- register int i;
-
- for (i = 0; i < 256; i++) {
- register unsigned char red, green, blue;
-
- bt459_select_reg(regs, i);
- red = regs->addr_cmap; wbflush();
- green = regs->addr_cmap; wbflush();
- blue = regs->addr_cmap; wbflush();
- printf("%x->[x%x x%x x%x]\n", i,
- red, green, blue);
-
- }
-}
-#endif
-
-/*
- * Video on/off
- *
- * It is unfortunate that X11 goes backward with white@0
- * and black@1. So we must stash away the zero-th entry
- * and fix it while screen is off. Also must remember
- * it, sigh.
- */
-struct vstate {
- bt459_padded_regmap_t *regs;
- unsigned short off;
-};
-
-bt459_video_off(
- struct vstate *vstate,
- user_info_t *up)
-{
- register bt459_padded_regmap_t *regs = vstate->regs;
- unsigned char *save;
-
- if (vstate->off)
- return;
-
- /* Yes, this is awful */
- save = (unsigned char *)up->dev_dep_2.gx.colormap;
-
- bt459_select_reg(regs, 0);
- *save++ = regs->addr_cmap;
- *save++ = regs->addr_cmap;
- *save++ = regs->addr_cmap;
-
- bt459_select_reg(regs, 0);
- regs->addr_cmap = 0;
- wbflush();
- regs->addr_cmap = 0;
- wbflush();
- regs->addr_cmap = 0;
- wbflush();
-
- bt459_write_reg( regs, BT459_REG_PRM, 0);
- bt459_write_reg( regs, BT459_REG_CCR, 0);
-
- vstate->off = 1;
-}
-
-bt459_video_on(
- struct vstate *vstate,
- user_info_t *up)
-{
- register bt459_padded_regmap_t *regs = vstate->regs;
- unsigned char *save;
-
- if (!vstate->off)
- return;
-
- /* Like I said.. */
- save = (unsigned char *)up->dev_dep_2.gx.colormap;
-
- bt459_select_reg(regs, 0);
- regs->addr_cmap = *save++;
- wbflush();
- regs->addr_cmap = *save++;
- wbflush();
- regs->addr_cmap = *save++;
- wbflush();
-
- bt459_write_reg( regs, BT459_REG_PRM, 0xff);
- bt459_write_reg( regs, BT459_REG_CCR, 0xc0);
-
- vstate->off = 0;
-}
-
-/*
- * Cursor
- */
-bt459_pos_cursor(
- bt459_padded_regmap_t *regs,
- register int x,
- register int y)
-{
-#define lo(v) ((v)&0xff)
-#define hi(v) (((v)&0xf00)>>8)
- bt459_write_reg( regs, BT459_REG_CXLO, lo(x + 219));
- bt459_write_reg( regs, BT459_REG_CXHI, hi(x + 219));
- bt459_write_reg( regs, BT459_REG_CYLO, lo(y + 34));
- bt459_write_reg( regs, BT459_REG_CYHI, hi(y + 34));
-}
-
-
-bt459_cursor_color(
- bt459_padded_regmap_t *regs,
- color_map_t *color)
-{
- register int i;
-
- bt459_select_reg_macro( regs, BT459_REG_CCOLOR_2);
- for (i = 0; i < 2; i++) {
- regs->addr_reg = color->red;
- wbflush();
- regs->addr_reg = color->green;
- wbflush();
- regs->addr_reg = color->blue;
- wbflush();
- color++;
- }
-}
-
-bt459_cursor_sprite(
- bt459_padded_regmap_t *regs,
- unsigned char *cursor)
-{
- register int i, j;
-
- /*
- * As per specs, must run a check to see if we
- * had contention. If so, re-write the cursor.
- */
- for (i = 0, j = 0; j < 2; j++) {
- /* loop once to write */
- for ( ; i < 1024; i++)
- bt459_write_reg( regs, BT459_REG_CRAM_BASE+i, cursor[i]);
-
- /* loop to check, if fail write again */
- for (i = 0; i < 1024; i++)
- if (bt459_read_reg( regs, BT459_REG_CRAM_BASE+i) != cursor[i])
- break;
- if (i == 1024)
- break;/* all is well now */
- }
-}
-
-/*
- * Initialization
- */
-bt459_init(
- bt459_padded_regmap_t *regs,
- volatile char *reset,
- int mux)
-{
- if (bt459_read_reg(regs, BT459_REG_ID) != 0x4a)
- panic("bt459");
-
- if (mux == 4) {
- /* use 4:1 input mux */
- bt459_write_reg( regs, BT459_REG_CMD0, 0x40);
- } else if (mux == 5) {
- /* use 5:1 input mux */
- bt459_write_reg( regs, BT459_REG_CMD0, 0xc0);
- } /* else donno */
-
- *reset = 0; /* force chip reset */
-
- /* no zooming, no panning */
- bt459_write_reg( regs, BT459_REG_CMD1, 0x00);
-
- /* signature test, X-windows cursor, no overlays, SYNC* PLL,
- normal RAM select, 7.5 IRE pedestal, do sync */
- bt459_write_reg( regs, BT459_REG_CMD2, 0xc2);
-
- /* get all pixel bits */
- bt459_write_reg( regs, BT459_REG_PRM, 0xff);
-
- /* no blinking */
- bt459_write_reg( regs, BT459_REG_PBM, 0x00);
-
- /* no overlay */
- bt459_write_reg( regs, BT459_REG_ORM, 0x00);
-
- /* no overlay blink */
- bt459_write_reg( regs, BT459_REG_OBM, 0x00);
-
- /* no interleave, no underlay */
- bt459_write_reg( regs, BT459_REG_ILV, 0x00);
-
- /* normal operation, no signature analysis */
- bt459_write_reg( regs, BT459_REG_TEST, 0x00);
-
- /* no blinking, 1bit cross hair, XOR reg&crosshair,
- no crosshair on either plane 0 or 1,
- regular cursor on both planes */
- bt459_write_reg( regs, BT459_REG_CCR, 0xc0);
-
- /* home cursor */
- bt459_write_reg( regs, BT459_REG_CXLO, 0x00);
- bt459_write_reg( regs, BT459_REG_CXHI, 0x00);
- bt459_write_reg( regs, BT459_REG_CYLO, 0x00);
- bt459_write_reg( regs, BT459_REG_CYHI, 0x00);
-
- /* no crosshair window */
- bt459_write_reg( regs, BT459_REG_WXLO, 0x00);
- bt459_write_reg( regs, BT459_REG_WXHI, 0x00);
- bt459_write_reg( regs, BT459_REG_WYLO, 0x00);
- bt459_write_reg( regs, BT459_REG_WYHI, 0x00);
- bt459_write_reg( regs, BT459_REG_WWLO, 0x00);
- bt459_write_reg( regs, BT459_REG_WWHI, 0x00);
- bt459_write_reg( regs, BT459_REG_WHLO, 0x00);
- bt459_write_reg( regs, BT459_REG_WHHI, 0x00);
-}
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