/*
   * valkyriefb.h: Constants of all sorts for valkyriefb
   *
   *  Created 8 August 1998 by 
   *  Martin Costabel <costabel@wanadoo.fr> and Kevin Schoedel
   *
   * Vmode-switching changes and vmode 15/17 modifications created 29 August
   * 1998 by Barry K. Nathan <barryn@pobox.com>.
   * 
   * vmode 10 changed by Steven Borley <sjb@salix.demon.co.uk>, 14 mai 2000
   *
   * Ported to 68k Macintosh by David Huggins-Daines <dhd@debian.org>
   *
   * This program is free software; you can redistribute it and/or
   * modify it under the terms of the GNU General Public License
   * as published by the Free Software Foundation; either version
   * 2 of the License, or (at your option) any later version.
   *
   * Based directly on:
   *
   *  controlfb.h: Constants of all sorts for controlfb
   *  Copyright (C) 1998 Daniel Jacobowitz <dan@debian.org>
   *
   *  pmc-valkyrie.h: Console support for PowerMac "control" display adaptor.
   *  Copyright (C) 1997 Paul Mackerras.
   *
   *  pmc-valkyrie.c: Console support for PowerMac "control" display adaptor.
   *  Copyright (C) 1997 Paul Mackerras.
   *
   * and indirectly from:
   *
   *  pmc-control.h: Console support for PowerMac "control" display adaptor.
   *  Copyright (C) 1997 Paul Mackerras.
   *
   *  pmc-control.c: Console support for PowerMac "control" display adaptor.
   *  Copyright (C) 1996 Paul Mackerras.
   *
   *  platinumfb.c: Console support for PowerMac "platinum" display adaptor.
   *  Copyright (C) 1998 Jon Howell
   */
  
  #ifdef CONFIG_MAC
  /* Valkyrie registers are word-aligned on m68k */
  #define VALKYRIE_REG_PADSIZE	3
  #else
  #define VALKYRIE_REG_PADSIZE	7
  #endif
  
  /*
   * Structure of the registers for the Valkyrie colormap registers.
   */
  struct cmap_regs {
  	unsigned char addr;
  	char pad1[VALKYRIE_REG_PADSIZE];
  	unsigned char lut;
  };
  
  /*
   * Structure of the registers for the "valkyrie" display adaptor.
   */
  
  struct vpreg {			/* padded register */
  	unsigned char r;
  	char pad[VALKYRIE_REG_PADSIZE];
  };
  
  
  struct valkyrie_regs {
  	struct vpreg mode;
  	struct vpreg depth;
  	struct vpreg status;
  	struct vpreg reg3;
  	struct vpreg intr;
  	struct vpreg reg5;
  	struct vpreg intr_enb;
  	struct vpreg msense;
  };
  
  /*
   * Register initialization tables for the valkyrie display.
   *
   * Dot clock rate is
   * 3.9064MHz * 2**clock_params[2] * clock_params[1] / clock_params[0].
   */
  struct valkyrie_regvals {
  	unsigned char mode;
  	unsigned char clock_params[3];
  	int	pitch[2];		/* bytes/line, indexed by color_mode */
  	int	hres;
  	int	vres;
  };
  
  #ifndef CONFIG_MAC
  /* Register values for 1024x768, 75Hz mode (17) */
  /* I'm not sure which mode this is (16 or 17), so I'm defining it as 17,
   * since the equivalent mode in controlfb (which I adapted this from) is
   * also 17. Just because MacOS can't do this on Valkyrie doesn't mean we
   * can't! :)
   *
   * I was going to use 12, 31, 3, which I found by myself, but instead I'm
   * using 11, 28, 3 like controlfb, for consistency's sake.
   */
  
  static struct valkyrie_regvals valkyrie_reg_init_17 = {
      15, 
      { 11, 28, 3 },  /* pixel clock = 79.55MHz for V=74.50Hz */
      { 1024, 0 },
  	1024, 768
  };
  
  /* Register values for 1024x768, 72Hz mode (15) */
  /* This used to be 12, 30, 3 for pixel clock = 78.12MHz for V=72.12Hz, but
   * that didn't match MacOS in the same video mode on this chip, and it also
   * caused the 15" Apple Studio Display to not work in this mode. While this
   * mode still doesn't match MacOS exactly (as far as I can tell), it's a lot
   * closer now, and it works with the Apple Studio Display.
   *
   * Yes, even though MacOS calls it "72Hz", in reality it's about 70Hz.
   */
  static struct valkyrie_regvals valkyrie_reg_init_15 = {
      15,
      { 12, 29, 3 },  /* pixel clock = 75.52MHz for V=69.71Hz? */
  		    /* I interpolated the V=69.71 from the vmode 14 and old 15
  		     * numbers. Is this result correct?
  		     */
      { 1024, 0 },
  	1024, 768
  };
  
  /* Register values for 1024x768, 60Hz mode (14) */
  static struct valkyrie_regvals valkyrie_reg_init_14 = {
      14,
      { 15, 31, 3 },  /* pixel clock = 64.58MHz for V=59.62Hz */
      { 1024, 0 },
  	1024, 768
  };
  #endif /* !defined CONFIG_MAC */
  
  /* Register values for 832x624, 75Hz mode (13) */
  static struct valkyrie_regvals valkyrie_reg_init_13 = {
      9,
      { 23, 42, 3 },  /* pixel clock = 57.07MHz for V=74.27Hz */
      { 832, 0 },
  	832, 624
  };
  
  /* Register values for 800x600, 72Hz mode (11) */
  static struct valkyrie_regvals valkyrie_reg_init_11 = {
      13,
      { 17, 27, 3 },  /* pixel clock = 49.63MHz for V=71.66Hz */
      { 800, 0 },
  	800, 600
  };
  
  /* Register values for 800x600, 60Hz mode (10) */
  static struct valkyrie_regvals valkyrie_reg_init_10 = {
      12,
      { 25, 32, 3 },  /* pixel clock = 40.0015MHz,
                       used to be 20,53,2, pixel clock 41.41MHz for V=59.78Hz */
      { 800, 1600 },
  	800, 600
  };
  
  /* Register values for 640x480, 67Hz mode (6) */
  static struct valkyrie_regvals valkyrie_reg_init_6 = {
      6,
      { 14, 27, 2 },  /* pixel clock = 30.13MHz for V=66.43Hz */
      { 640, 1280 },
  	640, 480
  };
  
  /* Register values for 640x480, 60Hz mode (5) */
  static struct valkyrie_regvals valkyrie_reg_init_5 = {
      11,
      { 23, 37, 2 },  /* pixel clock = 25.14MHz for V=59.85Hz */
      { 640, 1280 },
  	640, 480
  };
  
  static struct valkyrie_regvals *valkyrie_reg_init[VMODE_MAX] = {
  	NULL,
  	NULL,
  	NULL,
  	NULL,
  	&valkyrie_reg_init_5,
  	&valkyrie_reg_init_6,
  	NULL,
  	NULL,
  	NULL,
  	&valkyrie_reg_init_10,
  	&valkyrie_reg_init_11,
  	NULL,
  	&valkyrie_reg_init_13,
  #ifndef CONFIG_MAC
  	&valkyrie_reg_init_14,
  	&valkyrie_reg_init_15,
  	NULL,
  	&valkyrie_reg_init_17,
  #endif
  };