/* SPDX-License-Identifier: GPL-2.0-or-later *//* * controlfb_hw.h: Constants of all sorts for controlfb * * Copyright (C) 1998 Daniel Jacobowitz <dan@debian.org> * * Based on an awful lot of code, including: * * control.c: Console support for PowerMac "control" display adaptor. * Copyright (C) 1996 Paul Mackerras. * * The so far unpublished platinumfb.c * Copyright (C) 1998 Jon Howell */ /* * Structure of the registers for the RADACAL colormap device. */struct cmap_regs {	unsigned char addr;	/* index for both cmap and misc registers */	char pad1[15];	unsigned char crsr;	/* cursor palette */	char pad2[15];	unsigned char dat;	/* RADACAL misc register data */	char pad3[15];	unsigned char lut;	/* cmap data */	char pad4[15];}; /* * Structure of the registers for the "control" display adaptor. */#define PAD(x)	char x[12] struct preg {			/* padded register */	unsigned r;	char pad[12];}; struct control_regs {	struct preg vcount;	/* vertical counter */	/* Vertical parameters are in units of 1/2 scan line */	struct preg vswin;	/* between vsblank and vssync */	struct preg vsblank;	/* vert start blank */	struct preg veblank;	/* vert end blank (display start) */	struct preg vewin;	/* between vesync and veblank */	struct preg vesync;	/* vert end sync */	struct preg vssync;	/* vert start sync */	struct preg vperiod;	/* vert period */	struct preg piped;	/* pipe delay hardware cursor */	/* Horizontal params are in units of 2 pixels */	struct preg hperiod;	/* horiz period - 2 */	struct preg hsblank;	/* horiz start blank */	struct preg heblank;	/* horiz end blank */	struct preg hesync;	/* horiz end sync */	struct preg hssync;	/* horiz start sync */	struct preg heq;	/* half horiz sync len */	struct preg hlfln;	/* half horiz period */	struct preg hserr;	/* horiz period - horiz sync len */	struct preg cnttst;	struct preg ctrl;	/* display control */	struct preg start_addr;	/* start address: 5 lsbs zero */	struct preg pitch;	/* addrs diff between scan lines */	struct preg mon_sense;	/* monitor sense bits */	struct preg vram_attr;	/* enable vram banks */	struct preg mode;	struct preg rfrcnt;	/* refresh count */	struct preg intr_ena;	/* interrupt enable */	struct preg intr_stat;	/* interrupt status */	struct preg res[5];}; struct control_regints {	/* Vertical parameters are in units of 1/2 scan line */	unsigned vswin;	/* between vsblank and vssync */	unsigned vsblank;	/* vert start blank */	unsigned veblank;	/* vert end blank (display start) */	unsigned vewin;	/* between vesync and veblank */	unsigned vesync;	/* vert end sync */	unsigned vssync;	/* vert start sync */	unsigned vperiod;	/* vert period */	unsigned piped;		/* pipe delay hardware cursor */	/* Horizontal params are in units of 2 pixels */	/* Except, apparently, for hres > 1024 (or == 1280?) */	unsigned hperiod;	/* horiz period - 2 */	unsigned hsblank;	/* horiz start blank */	unsigned heblank;	/* horiz end blank */	unsigned hesync;	/* horiz end sync */	unsigned hssync;	/* horiz start sync */	unsigned heq;		/* half horiz sync len */	unsigned hlfln;		/* half horiz period */	unsigned hserr;		/* horiz period - horiz sync len */};	/* * Dot clock rate is * 3.9064MHz * 2**clock_params[2] * clock_params[1] / clock_params[0]. */struct control_regvals {	unsigned regs[16];		/* for vswin .. hserr */	unsigned char mode;	unsigned char radacal_ctrl;	unsigned char clock_params[3];}; #define CTRLFB_OFF 16	/* position of pixel 0 in frame buffer */  /* * Best cmode supported by control */struct max_cmodes {	int m[2];	/* 0: 2MB vram, 1: 4MB vram */}; /* * Video modes supported by macmodes.c */static struct max_cmodes control_mac_modes[] = {	{{-1,-1}},	/* 512x384, 60Hz interlaced (NTSC) */	{{-1,-1}},	/* 512x384, 60Hz */	{{-1,-1}},	/* 640x480, 50Hz interlaced (PAL) */	{{-1,-1}},	/* 640x480, 60Hz interlaced (NTSC) */	{{ 2, 2}},	/* 640x480, 60Hz (VGA) */	{{ 2, 2}},	/* 640x480, 67Hz */	{{-1,-1}},	/* 640x870, 75Hz (portrait) */	{{-1,-1}},	/* 768x576, 50Hz (PAL full frame) */	{{ 2, 2}},	/* 800x600, 56Hz */	{{ 2, 2}},	/* 800x600, 60Hz */	{{ 2, 2}},	/* 800x600, 72Hz */	{{ 2, 2}},	/* 800x600, 75Hz */	{{ 1, 2}},	/* 832x624, 75Hz */	{{ 1, 2}},	/* 1024x768, 60Hz */	{{ 1, 2}},	/* 1024x768, 70Hz (or 72Hz?) */	{{ 1, 2}},	/* 1024x768, 75Hz (VESA) */	{{ 1, 2}},	/* 1024x768, 75Hz */	{{ 1, 2}},	/* 1152x870, 75Hz */	{{ 0, 1}},	/* 1280x960, 75Hz */	{{ 0, 1}},	/* 1280x1024, 75Hz */	{{ 1, 2}},	/* 1152x768, 60Hz */	{{ 0, 1}},	/* 1600x1024, 60Hz */};