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/*

 * sierra.c:

 *

 * RAMDAC definition for basic Sierra, SC15025 and SC1148x.

 */

#include <stdlib.h>

#include <stdio.h>

#include "libvga.h"

#include "timing.h"

#include "vgaregs.h"

#include "driver.h"             /* for __svgalib_driver_report */

#include "ramdac.h"

/*

 * RAMDAC definition for basic Sierra-type DAC

 * that can do 32K (5-5-5) color mode (16bpp) with doubled VCLK.

 * A value of 0x80 is written to the Hidden DAC register for this mode.

 */

#ifdef INCLUDE_SIERRA_DAC_TEST

static int Sierra_32K_probe(void)

{

    /* Should return 1 for any Sierra-type DAC. */

    return 0;

}

#else

#define Sierra_32K_probe 0

#endif

#ifdef INCLUDE_SIERRA_DAC

static void Sierra_32K_init(void)

{

    /* Should probe the exact DAC type. */

    if (__svgalib_driver_report)

        cprintf("svgalib: Using Sierra 32K DAC.\n");

}

static int Sierra_32K_map_clock(int bpp, int pixelclock)

{

    if (bpp == 16)

        return pixelclock * 2;

    return pixelclock;

}

static int Sierra_32K_map_horizontal_crtc(int bpp, int pixelclock, int htiming)

{

    if (bpp == 16)

        return htiming * 2;

    return htiming;

}

#endif

#if defined(INCLUDE_SIERRA_DAC) || defined(INCLUDE_ICW_DAC) || \

    defined(INCLUDE_ATT20C490_DAC) || defined(INCLUDE_ATT20C498_DAC)

void __svgalib_Sierra_32K_savestate(unsigned char *regs)

{

    _ramdac_dactocomm();

    regs[0] = inb(PEL_MSK);

}

void __svgalib_Sierra_32K_restorestate(const unsigned char *regs)

{

    _ramdac_dactocomm();

    outb(PEL_MSK, regs[0]);

}

#endif

#ifdef INCLUDE_SIERRA_DAC

static void Sierra_32K_initializestate(unsigned char *regs, int bpp, int colormode,

                                       int pixelclock)

{

    regs[0] = 0;

    if (colormode == RGB16_555)

        regs[0] = 0x80;

}

static void Sierra_32K_qualify_cardspecs(CardSpecs * cardspecs, int dacspeed)

{

    dacspeed = __svgalib_setDacSpeed(dacspeed, 80000);

    cardspecs->maxPixelClock4bpp = dacspeed;

    cardspecs->maxPixelClock8bpp = dacspeed;

    cardspecs->maxPixelClock16bpp = dacspeed / 2;

    cardspecs->maxPixelClock24bpp = 0;

    cardspecs->maxPixelClock32bpp = 0;

    cardspecs->mapClock = Sierra_32K_map_clock;

    cardspecs->mapHorizontalCrtc = Sierra_32K_map_horizontal_crtc;

    cardspecs->flags |= NO_RGB16_565;

}

DacMethods __svgalib_Sierra_32K_methods =

{

    SIERRA_32K,

    "Sierra 32K colors VGA DAC",

    0,

    Sierra_32K_probe,

    Sierra_32K_init,

    Sierra_32K_qualify_cardspecs,

    __svgalib_Sierra_32K_savestate,

    __svgalib_Sierra_32K_restorestate,

    Sierra_32K_initializestate,

    1                           /* State size. */

};

#endif

/*

 * RAMDAC definition for Sierra 15025/26

 */

#ifdef INCLUDE_SC15025_DAC_TEST

static unsigned char SC15025_Rev;

static int SC15025_probe(void)

{

    unsigned char c, id[4];

    int i, flag = 0;

    _ramdac_dactocomm();

    c = inb(PEL_MSK);

    _ramdac_setcomm(c | 0x10);

    for (i = 0; i < 4; i++) {

        outb(PEL_IR, 0x9 + i);

        id[i] = inb(PEL_IW);

    }

    _ramdac_setcomm(c);

    _ramdac_dactopel();

    if (id[0] == 'S' &&         /* Sierra */

        ((id[1] << 8) | id[2]) == 15025) {      /* unique for the SC 15025/26 */

        flag = 1;

        SC15025_Rev = id[3];

    }

    return flag;

}

#else

#define SC15025_probe 0

#define SC15025_Rev ' '

#endif

#ifdef INCLUDE_SC15025_DAC

static void SC15025_init(void)

{

    if (__svgalib_driver_report)

        cprintf("svgalib: Using Sierra 15025/26%c truecolor DAC.\n", SC15025_Rev);

}

static void SC15025_initializestate(unsigned char *regs, int bpp, int colormode,

                                    int pixelclock)

{

    regs[0] = 0;

    regs[1] = 0;

    regs[2] = 0;

    if (colormode == RGB16_555) {

        regs[0] = 0x80;

        regs[1] = 1;

    } else if (colormode == RGB16_565) {

        regs[0] = 0xC0;

        regs[1] = 1;

    } else if (colormode == RGB32_888_B) {

        regs[0] = 0x40;

        regs[1] = 1;

        regs[2] = 1;

    }

    /* ARI: FIXME: regs[1] should be 1 for CLUT8_8 */

    /*      also: OR 8 to regs[0] to enable gamma correction */

}

static void SC15025_savestate(unsigned char *regs)

{

    _ramdac_dactocomm();

    regs[0] = inb(PEL_MSK);

    _ramdac_setcomm(regs[0] | 0x10);

    _ramdac_dactocomm();

    outb(PEL_IR, 8);

    regs[1] = inb(PEL_IW);      /* Aux control */

    outb(PEL_IR, 16);

    regs[2] = inb(PEL_IW);      /* Pixel Repack */

    _ramdac_setcomm(regs[0]);

}

static void SC15025_restorestate(const unsigned char *regs)

{

    unsigned char c;

    _ramdac_dactocomm();

    c = inb(PEL_MSK);

    _ramdac_setcomm(c | 0x10);

    _ramdac_dactocomm();

    outb(PEL_IR, 8);

    outb(PEL_IW, regs[1]);      /* Aux control */

    outb(PEL_IR, 16);

    outb(PEL_IW, regs[2]);      /* Pixel Repack */

    _ramdac_setcomm(c);

    _ramdac_setcomm(regs[0]);

}

static int SC15025_map_clock(int bpp, int pixelclock)

{

    if (bpp == 32)

        return pixelclock * 2;

    return pixelclock;

}

static int SC15025_map_horizontal_crtc(int bpp, int pixelclock, int htiming)

{

    if (bpp == 16)

        return htiming * 2;

    if (bpp == 32)

        return htiming * 4;

    return htiming;

}

static void SC15025_qualify_cardspecs(CardSpecs * cardspecs, int dacspeed)

{

    dacspeed = __svgalib_setDacSpeed(dacspeed, 110000);

    cardspecs->maxPixelClock4bpp = dacspeed;

    cardspecs->maxPixelClock8bpp = dacspeed;

    cardspecs->maxPixelClock16bpp = dacspeed / 2;

    cardspecs->maxPixelClock24bpp = 0;

    cardspecs->maxPixelClock32bpp = dacspeed / 3;

    cardspecs->mapClock = SC15025_map_clock;

    cardspecs->mapHorizontalCrtc = SC15025_map_horizontal_crtc;

}

DacMethods __svgalib_SC15025_methods =

{

    SIERRA_15025,

    "Sierra SC15025/6 DAC",

    0,

    SC15025_probe,

    SC15025_init,

    SC15025_qualify_cardspecs,

    SC15025_savestate,

    SC15025_restorestate,

    SC15025_initializestate,

    3                           /* State size. */

};

#endif

/*

 * RAMDAC definition for Sierra 1148x Series.

 * 11482, 83, and 84 (Mark 2) can do 32K (5-5-5) color mode (16bpp).

 * 11485, 87, and 89 (Mark 3) additionally can do 64K (5-6-5) color mode,

 * but are not autodetected since they cannot be distinguished from Mark 2.

 * 11486 really is a Sierra 32K dac, and should have been set by user.

 *

 * Note that these dacs are different from 'Sierra 32K', since they can be

 * detected as such, while there are clones that work compatible to the

 * Sierra dacs, but cannot be autodetected. To avoid such dacs to fail

 * the type 'Sierra 32K' still refers to them, while this new type

 * 'SC1148x Series' refers to original Sierra dacs.

 *

 * ATTENTION: THIS TEST MUST BE LAST IN CHAIN, SINCE MANY BETTER DACS

 * IMPLEMENT 32K MODES COMPATIBLE TO THIS ONE AND WOULD BE DETECTED AS

 * SIERRA!

 *

 */

#ifdef INCLUDE_SC1148X_DAC_TEST

static int SC1148X_probe(void)

{

    unsigned char oc, op, tmp, tmp2;

    int flag = 0;

    _ramdac_dactopel();

    tmp = inb(PEL_MSK);

    do {

        tmp2 = tmp;

        tmp = inb(PEL_MSK);

    } while (tmp2 != tmp);

    inb(PEL_IW);

    inb(PEL_MSK);

    inb(PEL_MSK);

    inb(PEL_MSK);

    for (tmp2 = 9; tmp != 0x8E && tmp2 > 0; tmp2--)

        tmp = inb(PEL_MSK);

    if (tmp != 0x8E) {

        _ramdac_dactocomm();

        oc = inb(PEL_MSK);

        _ramdac_dactopel();

        op = inb(PEL_MSK);

        tmp = oc ^ 0xFF;

        outb(PEL_MSK, tmp);

        _ramdac_dactocomm();

        tmp2 = inb(PEL_MSK);

        if (tmp2 != tmp) {

            tmp = _ramdac_setcomm(tmp = oc ^ 0x60);

            if ((tmp & 0xe0) == (tmp2 & 0xe0)) {

                tmp = inb(PEL_MSK);

                _ramdac_dactopel();

                if (tmp != inb(PEL_MSK))

                    flag = 1; /* Sierra Mark 2 or 3 */

            } else {

                /* We have a Sierra SC11486 */

#ifdef INCLUDE_SIERRA_DAC

                flag = 1;

                /* We do some ugly trickery here to patch SC1148X Series

                    descriptor with values from Sierra 32K descriptor, since

                    this is what whe really have detected! */

                __svgalib_SC1148X_methods.id = SIERRA_32K;

                __svgalib_SC1148X_methods.name = __svgalib_Sierra_32K_methods.name;

                __svgalib_SC1148X_methods.initialize = __svgalib_Sierra_32K_methods.initialize;

                __svgalib_SC1148X_methods.qualifyCardSpecs = __svgalib_Sierra_32K_methods.qualifyCardSpecs ;

                __svgalib_SC1148X_methods.initializeState = __svgalib_Sierra_32K_methods.initializeState ;

#endif

            }

            _ramdac_dactocomm();

            outb(PEL_MSK, oc);

        }

        _ramdac_dactopel();

        outb(PEL_MSK, op);

    } else {

        _ramdac_dactopel();

        /* Diamond SS2410 */

    }

    return flag;

}

#else

#define SC1148x_probe 0

#endif

#ifdef INCLUDE_SC1148X_DAC

static void SC1148X_init(void)

{

    if (__svgalib_driver_report)

        cprintf("svgalib: Using Sierra 1148x series 32K DAC.\n");

}

static void SC1148X_initializestate(unsigned char *regs, int bpp, int colormode,

                                       int pixelclock)

{

    regs[0] = 0;

    if (colormode == RGB16_555)

        regs[0] = 0xA0;

    /* Mark 3 (not autodetected) */

    else if (colormode == RGB16_565)

        regs[0] = 0xE0;

}

static void SC1148X_qualify_cardspecs(CardSpecs * cardspecs, int dacspeed)

{

    dacspeed = __svgalib_setDacSpeed(dacspeed, 110000);

    cardspecs->maxPixelClock4bpp = dacspeed;

    cardspecs->maxPixelClock8bpp = dacspeed;

    cardspecs->maxPixelClock16bpp = dacspeed / 2;

    cardspecs->maxPixelClock24bpp = 0;

    cardspecs->maxPixelClock32bpp = 0;

    cardspecs->mapClock = Sierra_32K_map_clock;

    cardspecs->mapHorizontalCrtc = Sierra_32K_map_horizontal_crtc;

    cardspecs->flags |= NO_RGB16_565;   /* Mark 3 (11485,87, and higher) can */

}

DacMethods __svgalib_SC1148X_methods =

{

    SIERRA_1148X,

    "Sierra SC1148x series 32K colors VGA DAC",

    0,

    SC1148X_probe,

    SC1148X_init,

    SC1148X_qualify_cardspecs,

    __svgalib_Sierra_32K_savestate,

    __svgalib_Sierra_32K_restorestate,

    SC1148X_initializestate,

    1                           /* State size. */

};

#endif