vts/mga/tools.c

/*
 * Copyright (c) 2006, 2015, Oracle and/or its affiliates. All rights reserved.
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
 * DEALINGS IN THE SOFTWARE.
 */

#include "libvtsSUNWmga.h"  /* Common VTS library definitions */

hrtime_t mga_loop_time = (hrtime_t) 10 * NANOSEC;    /* time to busy wait */

#if !defined(_BIG_ENDIAN)
int mga_big_endian = 0;
#else /* defined(_BIG_ENDIAN) */
int mga_big_endian = 1;
#endif /* defined(_BIG_ENDIAN) */

int
mga_map_mem(
    register return_packet *const rp,
    register int const test)
{
    if (mga_get_pci_info() != 0) {
        gfx_vts_set_message(rp, 1, test, "get pci info failed");
        return (-1);
    }

    if (mga_map_fb() != 0) {
        gfx_vts_set_message(rp, 1, test, "map framebuffer failed");
        return (-1);
    }

    if (mga_map_control() != 0) {
        gfx_vts_set_message(rp, 1, test, "map control failed");
        return (-1);
    }

    if (mga_map_iload() != 0) {
        gfx_vts_set_message(rp, 1, test, "map iload failed");
        return (-1);
    }

    return (0);
}

int
mga_get_pci_info(
    void)
{
    struct gfx_pci_cfg pciconfig;

    if (ioctl(mga_info.mga_fd, GFX_IOCTL_GET_PCI_CONFIG,
        &pciconfig) != 0)
        return (-1);

    mga_info.mga_vendor = pciconfig.VendorID;
    mga_info.mga_device = pciconfig.DeviceID;

    mga_info.mga_fb_addr = pciconfig.bar[0] & PCI_BASE_M_ADDR_M;
    mga_info.mga_fb_size = MGASIZE_FB;

    mga_info.mga_control_addr = pciconfig.bar[1] & PCI_BASE_M_ADDR_M;
    mga_info.mga_control_size = MGASIZE_CONTROL;

    mga_info.mga_iload_addr = pciconfig.bar[2] & PCI_BASE_M_ADDR_M;
    mga_info.mga_iload_size = MGASIZE_ILOAD;

    if (gfx_vts_debug_mask & VTS_DEBUG) {
        printf("mga_vendor = 0x%04x, mga_device = 0x%04x\n",
            mga_info.mga_vendor, mga_info.mga_device);
        printf("fb_addr = 0x%08llx, mga_fb_size = 0x%08lx\n",
            (unsigned long long) mga_info.mga_fb_addr,
            (unsigned long) mga_info.mga_fb_size);
        printf("control_addr = 0x%08llx, mga_control_size = 0x%08lx\n",
            (unsigned long long) mga_info.mga_control_addr,
            (unsigned long) mga_info.mga_control_size);
        printf("iload_addr = 0x%08llx, mga_iload_size = 0x%08lx\n",
            (unsigned long long) mga_info.mga_iload_addr,
            (unsigned long) mga_info.mga_iload_size);
    }

    return (0);
}

int
mga_map_fb(
    void)
{
    if (mga_info.mga_fb_ptr == NULL) {
        register void *ptr;

        ptr = mmap(NULL, mga_info.mga_fb_size,
            PROT_READ | PROT_WRITE, MAP_SHARED,
            mga_info.mga_fd, mga_info.mga_fb_addr);

        if (ptr == MAP_FAILED)
            return (-1);

        mga_info.mga_fb_ptr = (char *) ptr;
    }

    if (gfx_vts_debug_mask & VTS_DEBUG)
        printf("mga_fb_ptr = 0x%llx\n",
            (unsigned long long) mga_info.mga_fb_ptr);

    return (0);
}

int
mga_map_control(
    void)
{
    if (mga_info.mga_control_ptr == NULL) {
        register void *ptr;

        ptr = mmap(NULL, mga_info.mga_control_size,
            PROT_READ | PROT_WRITE, MAP_SHARED,
            mga_info.mga_fd, mga_info.mga_control_addr);

        if (ptr == MAP_FAILED)
            return (-1);

        mga_info.mga_control_ptr = (mga_t volatile *) ptr;
    }

    if (gfx_vts_debug_mask & VTS_DEBUG)
        printf("mga_control_ptr = 0x%llx\n",
            (unsigned long long) mga_info.mga_control_ptr);

    return (0);
}

int
mga_map_iload(
    void)
{
    if (mga_info.mga_iload_ptr == NULL) {
        register void *ptr;

        ptr = mmap(NULL, mga_info.mga_iload_size,
            PROT_READ | PROT_WRITE, MAP_SHARED,
            mga_info.mga_fd, mga_info.mga_iload_addr);

        if (ptr == MAP_FAILED)
            return (-1);

        mga_info.mga_iload_ptr = (char volatile *) ptr;
    }

    if (gfx_vts_debug_mask & VTS_DEBUG)
        printf("mga_iload_ptr = 0x%llx\n",
            (unsigned long long) mga_info.mga_iload_ptr);

    return (0);
}

int
mga_init_info(
    register return_packet *const rp,
    register int const test)
{
    register mga_t volatile *mgaptr;

    if (mga_get_fb_size() == 0) {
        gfx_vts_set_message(rp, 1, test, "get fb size failed");
        return (-1);
    }

    if (mga_get_screen_size() == 0) {
        gfx_vts_set_message(rp, 1, test, "get resolution failed");
        return (-1);
    }

    mgaptr = mga_info.mga_control_ptr;
    mga_info.mga_opmode = mga_get_uint32(&mgaptr->mga_opmode);

    return (0);
}

#define MGA_FB_STEP (16 * 1024)

size_t
mga_get_fb_size(
    void)
{
    register uint32_t volatile *fbptr;
    register size_t offset;
    register uint32_t word;

    for (offset = 0, fbptr = (uint32_t volatile *) mga_info.mga_fb_ptr;
        offset < mga_info.mga_fb_size;
        offset += MGA_FB_STEP, fbptr += MGA_FB_STEP / sizeof (uint32_t)) {
        word = *fbptr;
        *fbptr = ~word;
        if (*fbptr != ~word) {
            *fbptr = word;
            break;
        }
        *fbptr = word;
        if (*fbptr != word)
            break;
    }

    mga_info.mga_fb_real_size = offset;

    if (gfx_vts_debug_mask & VTS_DEBUG)
        printf("mga_fb_real_size = %lu\n", (unsigned long) offset);

    return (offset);
}


int
mga_get_screen_size(
    void)
{
    register mga_t volatile *const mgaptr = mga_info.mga_control_ptr;
    register uint8_t save_crtc_index;
    register uint8_t save_crtcext_index;
    register uint8_t save_palwtadd;
    register uint8_t save_gctl_index;
    register uint8_t miscout;
    register uint8_t horiz_total;
    register uint8_t horiz_display_end;
    register uint8_t vert_total;
    register uint8_t vert_display_end;
    register uint8_t overflow;
    register uint8_t offset;
    register uint8_t addr_gen_ext;
    register uint8_t hor_counter_ext;
    register uint8_t vert_counter_ext;
    register uint8_t xmulctrl;
    register uint8_t misc;
    register uint8_t graphic_mode;
    register uint8_t miscellaneous;
    register uint32_t freq;
    register uint8_t m;
    register uint8_t n;
    register uint8_t p;
    register uint_t mode;
    register uint_t width;
    register uint_t height;
    register uint_t depth;
    register uint_t pixelsize;
    register uint_t pclk;
    register uint_t htotal;
    register uint_t vtotal;
    register uint_t hz;
    register uint_t pitch;

    /* Get the miscellaneous output register */

    miscout = mgaptr->mga_miscout_read;

    /* Save the crtc index. */

    save_crtc_index = mgaptr->mga_crtc_index;

    /* Get the horizontal total */

    mgaptr->mga_crtc_index = MGA_CRTC_HORIZ_TOTAL;
    horiz_total = mgaptr->mga_crtc_data;

    /* Get the horizontal display end. */

    mgaptr->mga_crtc_index = MGA_CRTC_HORIZ_DISPLAY_END;
    horiz_display_end = mgaptr->mga_crtc_data;

    /* Get the vertical total */

    mgaptr->mga_crtc_index = MGA_CRTC_VERT_TOTAL;
    vert_total = mgaptr->mga_crtc_data;

    /* Get the vertical display end. */

    mgaptr->mga_crtc_index = MGA_CRTC_VERT_DISPLAY_END;
    vert_display_end = mgaptr->mga_crtc_data;

    /* Get the overflow */

    mgaptr->mga_crtc_index = MGA_CRTC_OVERFLOW;
    overflow = mgaptr->mga_crtc_data;

    /* Get the offset */

    mgaptr->mga_crtc_index = MGA_CRTC_OFFSET;
    offset = mgaptr->mga_crtc_data;

    /* Restore the crtc index. */

    mgaptr->mga_crtc_index = save_crtc_index;

    /* Save the crtcext index. */

    save_crtcext_index = mgaptr->mga_crtcext_index;

    /* Get the address generator extensions */

    mgaptr->mga_crtcext_index = MGA_CRTCEXT_ADDR_GEN_EXT;
    addr_gen_ext = mgaptr->mga_crtcext_data;

    /* Get the horizontal counter extensions */

    mgaptr->mga_crtcext_index = MGA_CRTCEXT_HOR_COUNT_EXT;
    hor_counter_ext = mgaptr->mga_crtcext_data;

    /* Get the vertical counter extensions */

    mgaptr->mga_crtcext_index = MGA_CRTCEXT_VERT_COUNT_EXT;
    vert_counter_ext = mgaptr->mga_crtcext_data;

    /* Get the miscellaneous register */

    mgaptr->mga_crtcext_index = MGA_CRTCEXT_MISC;
    misc = mgaptr->mga_crtcext_data;

    /* Restore the crtcext index. */

    mgaptr->mga_crtcext_index = save_crtcext_index;

    /* Save the dac index. */

    save_palwtadd = mgaptr->mga_palwtadd;

    /* Get the multiplex control. */

    mgaptr->mga_palwtadd = MGA_XDATA_XMULCTRL;
    xmulctrl = mgaptr->mga_x_datareg;

    /* Get the appropriate clock values */

    switch (miscout & MGA_MISCOUT_CLKSEL_MASK) {
        case MGA_MISCOUT_CLKSEL_25MHZ:  /* 0x00 */
        freq = MGA_XPIXPLLPA_REFCLK;

        /* Get pixpllam register */

        mgaptr->mga_palwtadd = MGA_XDATA_XPIXPLLAM;
        m = mgaptr->mga_x_datareg;

        /* Get pixpllan register */

        mgaptr->mga_palwtadd = MGA_XDATA_XPIXPLLAN;
        n = mgaptr->mga_x_datareg;

        /* Get pixpllap register */

        mgaptr->mga_palwtadd = MGA_XDATA_XPIXPLLAP;
        p = mgaptr->mga_x_datareg;
        break;

        case MGA_MISCOUT_CLKSEL_28MHZ:  /* 0x04 */
        freq = MGA_XPIXPLLPB_REFCLK;

        /* Get pixpllbm register */

        mgaptr->mga_palwtadd = MGA_XDATA_XPIXPLLBM;
        m = mgaptr->mga_x_datareg;

        /* Get pixpllbn register */

        mgaptr->mga_palwtadd = MGA_XDATA_XPIXPLLBN;
        n = mgaptr->mga_x_datareg;

        /* Get pixpllbp register */

        mgaptr->mga_palwtadd = MGA_XDATA_XPIXPLLBP;
        p = mgaptr->mga_x_datareg;
        break;

        case MGA_MISCOUT_CLKSEL_MGAPIXEL0:  /* 0x08 */
        case MGA_MISCOUT_CLKSEL_MGAPIXEL1:  /* 0x0c */
        freq = MGA_XPIXPLLPC_REFCLK_G200E;

        /* Get pixpllcm register */

        mgaptr->mga_palwtadd = MGA_XDATA_XPIXPLLCM;
        m = mgaptr->mga_x_datareg;

        /* Get pixpllcn register */

        mgaptr->mga_palwtadd = MGA_XDATA_XPIXPLLCN;
        n = mgaptr->mga_x_datareg;

        /* Get pixpllcp register */

        mgaptr->mga_palwtadd = MGA_XDATA_XPIXPLLCP;
        p = mgaptr->mga_x_datareg;
        break;
        }

    /* Restore the dac index. */

    mgaptr->mga_palwtadd = save_palwtadd;

    /* Save the gctl index. */

    save_gctl_index = mgaptr->mga_gctl_index;

    /* Get the graphic mode register. */

    mgaptr->mga_gctl_index = MGA_GCTL_GRAPHIC_MODE;
    graphic_mode = mgaptr->mga_gctl_data;

    /* Get the miscellaneous register */

    mgaptr->mga_gctl_index = MGA_GCTL_MISCELLANEOUS;
    miscellaneous = mgaptr->mga_gctl_data;

    /* Restore the gctl index. */

    mgaptr->mga_gctl_index = save_gctl_index;

    /* Compute the width. */

    width = ((uint_t) horiz_display_end + 1) * 8;

    /* Compute the height. */

    height = (uint_t) vert_display_end;
    height |= (((uint_t) overflow >>
        MGA_CRTC_OVERFLOW_VDISPEND8_SHIFT) & 1) << 8;
    height |= (((uint_t) overflow >>
        MGA_CRTC_OVERFLOW_VDISPEND9_SHIFT) & 1) << 9;
    height |= (((uint_t) vert_counter_ext >>
        MGA_CRTCEXT_VCOUNT_VDISPEND10_SHIFT) & 1) << 10;
    height++;

    if (addr_gen_ext & MGA_CRTCEXT_ADDR_GEN_INTERLACE)
        height *= 2;

    if (!(misc & MGA_CRTCEXT_MISC_MGAMODE)) {
        if (!(miscellaneous & MGA_GCTL_MISC_GCGRMODE)) {
            mode = VIS_TEXT;
            depth = 4;
            width /= 8;
            height /= 16;
            pixelsize = 2;

        } else {
            mode = VIS_PIXEL;
            if (!(graphic_mode & MGA_GCTL_GRMODE_MODE256))
                depth = 4;
            else
                depth = 8;
            pixelsize = 1;
        }

    } else {
        mode = VIS_PIXEL;

        /* Compute the depth. */

        switch (xmulctrl & MGA_XMULCTRL_DEPTH_MASK) {
            case MGA_XMULCTRL_DEPTH_8BPP:       /* 0x00 */
            depth = 8;
            pixelsize = 1;
            break;

            case MGA_XMULCTRL_DEPTH_15BPP_1BPP_OVERLAY: /* 0x01 */
            depth = 15;
            pixelsize = 2;
            break;

            case MGA_XMULCTRL_DEPTH_16BPP:      /* 0x02 */
            depth = 16;
            pixelsize = 2;
            break;

            case MGA_XMULCTRL_DEPTH_24BPP:      /* 0x03 */
            depth = 24;
            pixelsize = 3;
            break;

            case MGA_XMULCTRL_DEPTH_32BPP_8BPP_OVERLAY: /* 0x04 */
            case MGA_XMULCTRL_DEPTH_32BPP_8BPP_UNUSED:  /* 0x07 */
            depth = 32;
            pixelsize = 4;
            break;

            default:
            return (0);
        }
    }

    pclk = (unsigned long long) freq *
        (unsigned long long) (n + 1) /
        (unsigned long long) ((m & MGA_XPIXPLLM_MASK) + 1) /
        (unsigned long long) ((p & MGA_XPIXPLLP_PIXPLLP_MASK) + 1);

    htotal = ((horiz_total |
        ((hor_counter_ext & MGA_CRTCEXT_HCOUNT_HTOTAL8) << 8)) + 5) * 8;

    vtotal = (vert_total |
        ((overflow & MGA_CRTC_OVERFLOW_VTOTAL8) << 8) |
        (((overflow >> MGA_CRTC_OVERFLOW_VTOTAL9_SHIFT) & 1) << 9) |
        ((vert_counter_ext & MGA_CRTCEXT_VCOUNT_VTOTAL10_11) << 10)) + 2;

    hz = (pclk + (htotal * vtotal / 2)) / (htotal * vtotal);

    pitch = ((((addr_gen_ext & MGA_CRTCEXT_ADDR_GEN_OFFSET8_9) >>
        MGA_CRTCEXT_ADDR_GEN_OFFSET8_9_SHIFT) << 8) + offset) * 8 * 2;

    mga_info.mga_mode = mode;
    mga_info.mga_width = width;
    mga_info.mga_height = height;
    mga_info.mga_depth = depth;
    mga_info.mga_hz = hz;
    mga_info.mga_pixelsize = pixelsize;
    mga_info.mga_linesize = pitch;

    return (1);
}


int
mga_mgamode(
    void)
{
    register mga_t volatile *const mgaptr = mga_info.mga_control_ptr;
    register uint8_t crtcext_index;
    register uint8_t misc;

    /* Save the crtcext index. */

    crtcext_index = mgaptr->mga_crtcext_index;

    /* Get the miscellaneous register */

    mgaptr->mga_crtcext_index = MGA_CRTCEXT_MISC;
    misc = mgaptr->mga_crtcext_data;

    /* Restore the crtcext index. */

    mgaptr->mga_crtcext_index = crtcext_index;

    if (!(misc & MGA_CRTCEXT_MISC_MGAMODE))
        return (0);
    else
        return (1);
}

int
mga_init_graphics(
    void)
{
    register mga_t volatile *const mgaptr = mga_info.mga_control_ptr;
    register uint32_t maccess;
    register uint32_t opmode = MGA_OPMODE_DIRDATASIZ_8BPP;
    static short endian = 1;

    if (!mga_wait_fifo(11))
        return (0);

    switch (mga_info.mga_depth) {
        case 8:
        maccess = MGA_MACCESS_PWIDTH_PW8;
        break;

        case 15:
        case 16:
        maccess = MGA_MACCESS_PWIDTH_PW16;
        if (!*(char const *)&endian)    /* big endian */
            opmode = MGA_OPMODE_DIRDATASIZ_16BPP;
        break;

        case 24:
        maccess = MGA_MACCESS_PWIDTH_PW24;
        break;

        case 32:
        maccess = MGA_MACCESS_PWIDTH_PW32;
        if (!*(char const *)&endian)    /* big endian */
            opmode = MGA_OPMODE_DIRDATASIZ_32BPP;
        break;
        }

    mga_put_uint32(&mgaptr->mga_maccess, maccess);
    mga_put_uint32(&mgaptr->mga_opmode, opmode);
    mga_put_uint32(&mgaptr->mga_pitch, mga_info.mga_linesize /
        mga_info.mga_pixelsize);
    mga_put_uint32(&mgaptr->mga_dstorg, 0);
    mga_put_uint32(&mgaptr->mga_ydstorg, 0);
    mga_put_uint32(&mgaptr->mga_cxbndry, (mga_info.mga_width - 1) << 16);
    mga_put_uint32(&mgaptr->mga_ytop, 0);
    mga_put_uint32(&mgaptr->mga_ybot, (mga_info.mga_height - 1) *
        mga_info.mga_linesize);
    mga_put_uint32(&mgaptr->mga_plnwt, 0xffffffff);
    mga_put_uint32(&mgaptr->mga_fcol, 0);
    mga_put_uint32(&mgaptr->mga_bcol, 0xffffffff);

    return (1);
}


void
mga_save_palet(
    void)
{
    register mga_t volatile *const mgaptr = mga_info.mga_control_ptr;
    register uint_t coloron;
    register uint8_t const save_palrdadd = mgaptr->mga_palrdadd;

    mgaptr->mga_palrdadd = 0;

    for (coloron = 0; coloron < 256; coloron++) {
        mga_info.mga_red[coloron] = mgaptr->mga_paldata;
        mga_info.mga_green[coloron] = mgaptr->mga_paldata;
        mga_info.mga_blue[coloron] = mgaptr->mga_paldata;
    }

    mgaptr->mga_palrdadd = save_palrdadd;
}


int
mga_set_palet(
    void)
{
    register mga_t volatile *const mgaptr = mga_info.mga_control_ptr;
    register uint_t coloron;
    register uint8_t save_palwtadd;
    uchar_t new_red[256];
    uchar_t new_green[256];
    uchar_t new_blue[256];

    switch (mga_info.mga_depth) {
        case 8: /* 3, 3, 2 */
        for (coloron = 0; coloron < 256; coloron++) {
            new_red[coloron] =
                (uint8_t)(((coloron >> 5) & 0x7) * 255 / 7);
            new_green[coloron] =
                (uint8_t)(((coloron >> 2) & 0x7) * 255 / 7);
            new_blue[coloron] =
                (uint8_t)((coloron & 0x3) * 255 / 3);
        }
        break;

        case 15:    /* 5, 5, 5 */
        for (coloron = 0; coloron < 256; coloron++) {
            new_red[coloron] =
                (uint8_t)((coloron & 0x1f) * 255 / 31);
            new_green[coloron] =
                (uint8_t)((coloron & 0x1f) * 255 / 31);
            new_blue[coloron] =
                (uint8_t)((coloron & 0x1f) * 255 / 31);
        }
        break;

        case 16:    /* 5, 6, 5 */
        for (coloron = 0; coloron < 256; coloron++) {
            new_red[coloron] =
                (uint8_t)((coloron & 0x1f) * 255 / 31);
            new_green[coloron] =
                (uint8_t)((coloron & 0x3f) * 255 / 63);
            new_blue[coloron] =
                (uint8_t)((coloron & 0x1f) * 255 / 31);
        }
        break;

        default:    /* 8, 8, 8 */
        for (coloron = 0; coloron < 256; coloron++) {
            new_red[coloron] = (uint8_t) coloron;
            new_green[coloron] = (uint8_t) coloron;
            new_blue[coloron] = (uint8_t) coloron;
        }
        break;
    }

    /* Don't set the palet if it matches what we will set. */

    for (coloron = 0; coloron < 256; coloron++) {
        if ((mga_info.mga_red[coloron] != new_red[coloron]) ||
            (mga_info.mga_green[coloron] != new_green[coloron]) ||
            (mga_info.mga_blue[coloron] != new_blue[coloron]))
            break;
    }

    if (coloron == 256)
        return (0);

    mga_info.mga_palet_changed = 1;
    save_palwtadd = mgaptr->mga_palwtadd;

    mgaptr->mga_palwtadd = 0;

    for (coloron = 0; coloron < 256; coloron++) {
        mgaptr->mga_paldata = new_red[coloron];
        mgaptr->mga_paldata = new_green[coloron];
        mgaptr->mga_paldata = new_blue[coloron];
    }

    mgaptr->mga_palwtadd = save_palwtadd;
    return (1);
}


int
mga_restore_palet(
    void)
{
    register mga_t volatile *const mgaptr = mga_info.mga_control_ptr;
    register uint_t coloron;
    register uint8_t save_palwtadd;

    if (!mga_info.mga_palet_changed)
        return (0);

    save_palwtadd = mgaptr->mga_palwtadd;

    mgaptr->mga_palwtadd = 0;

    for (coloron = 0; coloron < 256; coloron++) {
        mgaptr->mga_paldata = mga_info.mga_red[coloron];
        mgaptr->mga_paldata = mga_info.mga_green[coloron];
        mgaptr->mga_paldata = mga_info.mga_blue[coloron];
    }

    mgaptr->mga_palwtadd = save_palwtadd;

    mga_info.mga_palet_changed = 0;
    return (1);
}


uint_t
mga_color(
    register uint_t const red,
    register uint_t const green,
    register uint_t const blue)
{
    register uint_t value;

    switch (mga_info.mga_depth) {
        case 8: /* 3, 3, 2 */
        value = ((red >> 5) & 0x7) << 5;
        value |= ((green >> 5) & 0x7) << 2;
        value |= (blue >> 6) & 0x3;
        break;

        case 15:    /* 5, 5, 5 */
        value = ((red >> 3) & 0x1f) << 10;
        value |= ((green >> 3) & 0x1f) << 5;
        value |= (blue >> 3) & 0x1f;
        break;

        case 16:    /* 5, 6, 5 */
        value = ((red >> 3) & 0x1f) << 11;
        value |= ((green >> 2) & 0x3f) << 5;
        value |= (blue >> 3) & 0x1f;
        break;

        default:    /* 8, 8, 8 */
        value = (red & 0xff) << 16;
        value |= (green & 0xff) << 8;
        value |= blue & 0xff;
        break;
    }

    return (value);
}

void
mga_finish_graphics(
    void)
{
    register mga_t volatile *const mgaptr = mga_info.mga_control_ptr;

    mga_put_uint32(&mgaptr->mga_opmode, mga_info.mga_opmode);
}


int
mga_fill_solid_rect(
    register int const x1,
    register int const y1,
    register int const x2,
    register int const y2,
    register uint_t const fg)
{
    register mga_t volatile *const mgaptr = mga_info.mga_control_ptr;

    if (!mga_wait_fifo(5))
        return (0);

    mga_put_uint32(&mgaptr->mga_fcol, fg);
    mga_put_uint32(&mgaptr->mga_plnwt, 0xffffffff);
    mga_put_uint32(&mgaptr->mga_dwgctl,
        MGA_DWGCTL_BOP_COPY | MGA_DWGCTL_SHFTZERO |
        MGA_DWGCTL_SGNZERO | MGA_DWGCTL_ARZERO |
        MGA_DWGCTL_SOLID | MGA_DWGCTL_ZMODE_NOZCMP |
        MGA_DWGCTL_ATYPE_RPL | MGA_DWGCTL_OPCOD_TRAP);
    mga_put_uint32(&mgaptr->mga_fxbndry,
        (x2 << 16) | (x1 & 0xffff));
    mga_put_uint32(&mgaptr->mga_draw_ydstlen,
        (y1 << 16) | ((y2 - y1) & 0xffff));

    return (1);
}


int
mga_fill_pattern_rect(
    register int const x1,
    register int const y1,
    register int const x2,
    register int const y2,
    register uint_t const bg,
    register uint_t const fg,
    register uint64_t const pat)
{
    register mga_t volatile *const mgaptr = mga_info.mga_control_ptr;
    register int const width = x2 - x1;
    register int const height = y2 - y1;
    register int x;
    register int y;
    register uint32_t value;
    register uint32_t iloadon = 0;
    register uint32_t volatile *iloadptr =
        (uint32_t volatile *) mga_info.mga_iload_ptr;
    register int status;

    if (!mga_wait_fifo(11))
        return (0);

    mga_put_uint32(&mgaptr->mga_opmode, MGA_OPMODE_DIRDATASIZ_8BPP |
        MGA_OPMODE_DMADATASIZ_8BPP | MGA_OPMODE_DMAMOD_BLIT);
    mga_put_uint32(&mgaptr->mga_plnwt, 0xffffffff);
    mga_put_uint32(&mgaptr->mga_shift, 0);
    mga_put_uint32(&mgaptr->mga_bcol, bg);
    mga_put_uint32(&mgaptr->mga_fcol, fg);
    mga_put_uint32(&mgaptr->mga_dwgctl,
        MGA_DWGCTL_BLTMOD_BMONOLEF | MGA_DWGCTL_BOP_COPY |
        MGA_DWGCTL_SHFTZERO | MGA_DWGCTL_SGNZERO |
        MGA_DWGCTL_ZMODE_NOZCMP | MGA_DWGCTL_LINEAR |
        MGA_DWGCTL_ATYPE_RSTR | MGA_DWGCTL_OPCOD_ILOAD);
    mga_put_uint32(&mgaptr->mga_ar0, ((width + 31) / 32 * 32) *
        height - 1);
    mga_put_uint32(&mgaptr->mga_ar3, 0);
    mga_put_uint32(&mgaptr->mga_ar5, (width + 31) / 32);
    mga_put_uint32(&mgaptr->mga_fxbndry,
        ((x2 - 1) << 16) | (x1 & 0xffff));
    mga_put_uint32(&mgaptr->mga_draw_ydstlen,
        (y1 << 16) | (height & 0xffff));

    for (y = 0; y < height; y++) {
        value = 0;

        for (x = 0; x < width; x++) {
            value |= ((pat >> (((y + y1) & 7) * 8 +
                ((x + x1) & 7))) & 1) << (x & 0x1f);

            if ((x & 0x1f) == 0x1f || x == width - 1) {
                mga_put_uint32(iloadptr, value);

                iloadon += sizeof (uint32_t);
                if (iloadon < mga_info.mga_iload_size)
                    iloadptr++;
                else {
                    iloadon = 0;
                    iloadptr = (uint32_t volatile *)
                        mga_info.mga_iload_ptr;
                }
                value = 0;
            }
        }
    }

    status = mga_wait_idle();
    return (status);
}


int
mga_draw_solid_line(
    register int const x1,
    register int const y1,
    register int const x2,
    register int const y2,
    register uint_t const fg)
{
    register mga_t volatile *const mgaptr = mga_info.mga_control_ptr;

    if (!mga_wait_fifo(5))
        return (0);

    mga_put_uint32(&mgaptr->mga_fcol, fg);
    mga_put_uint32(&mgaptr->mga_plnwt, 0xffffffff);
    mga_put_uint32(&mgaptr->mga_dwgctl,
        MGA_DWGCTL_BOP_COPY | MGA_DWGCTL_SOLID |
        MGA_DWGCTL_ZMODE_NOZCMP | MGA_DWGCTL_ATYPE_RPL |
        MGA_DWGCTL_OPCOD_AUTOLINE_CLOSE);
    mga_put_uint32(&mgaptr->mga_xystrt, x1 | (y1 << 16));
    mga_put_uint32(&mgaptr->mga_draw_xyend, x2 | (y2 << 16));

    return (1);
}


int
mga_wait_fifo(
    register int const fifocount)
{
    register mga_t volatile *const mgaptr = mga_info.mga_control_ptr;
    register uint32_t fifostatus;
    register hrtime_t starttime;
    register hrtime_t curtime;
    register hrtime_t endtime;
    register ulong_t count = 0;

    starttime = gethrtime();
    endtime = starttime + mga_loop_time;

    do {
        count++;
        fifostatus = mga_get_uint32(&mgaptr->mga_fifostatus);
        if ((fifostatus & MGA_FIFOSTATUS_FIFOCOUNT_MASK) >= fifocount)
            break;
        curtime = gethrtime();
    } while (curtime < endtime);

    if ((fifostatus & MGA_FIFOSTATUS_FIFOCOUNT_MASK) < fifocount) {
        count++;
        fifostatus = mga_get_uint32(&mgaptr->mga_fifostatus);
    }

    if ((fifostatus & MGA_FIFOSTATUS_FIFOCOUNT_MASK) < fifocount)
        return (0);

    return (1);
}


int
mga_wait_idle(
    void)
{
    register mga_t volatile *const mgaptr = mga_info.mga_control_ptr;
    register uint32_t fifostatus;
    register hrtime_t starttime;
    register hrtime_t curtime;
    register hrtime_t endtime;
    register ulong_t count = 0;

    starttime = gethrtime();
    endtime = starttime + mga_loop_time;

    do {
        count++;
        fifostatus = mga_get_uint32(&mgaptr->mga_fifostatus);
        if (fifostatus & MGA_FIFOSTATUS_BEMPTY)
            break;
        curtime = gethrtime();
    } while (curtime < endtime);

    if (!(fifostatus & MGA_FIFOSTATUS_BEMPTY)) {
        count++;
        fifostatus = mga_get_uint32(&mgaptr->mga_fifostatus);
    }

    if (!(fifostatus & MGA_FIFOSTATUS_BEMPTY))
        return (0);

    return (1);
}


int
mga_unmap_mem(
    register return_packet *const rp,
    register int const test)
{
    if (mga_unmap_fb() != 0) {
        gfx_vts_set_message(rp, 1, test, "unmap framebuffer failed");
        return (-1);
    }

    if (mga_unmap_control() != 0) {
        gfx_vts_set_message(rp, 1, test, "unmap control failed");
        return (-1);
    }

    if (mga_unmap_iload() != 0) {
        gfx_vts_set_message(rp, 1, test, "unmap iload failed");
        return (-1);
    }

    return (0);
}

int
mga_unmap_fb(
    void)
{
    register int status;

    if (mga_info.mga_fb_ptr == NULL)
        return (0);

    status = munmap((char *) mga_info.mga_fb_ptr, mga_info.mga_fb_size);
    mga_info.mga_fb_ptr = NULL;

    return (status);
}


int
mga_unmap_control(
    void)
{
    register int status;

    if (mga_info.mga_control_ptr == NULL)
        return (0);

    status = munmap((char *) mga_info.mga_control_ptr,
        mga_info.mga_control_size);
    mga_info.mga_control_ptr = NULL;

    return (status);
}


int
mga_unmap_iload(
    void)
{
    register int status;

    if (mga_info.mga_iload_ptr == NULL)
        return (0);

    status = munmap((char *) mga_info.mga_iload_ptr,
        mga_info.mga_iload_size);
    mga_info.mga_iload_ptr = NULL;

    return (status);
}

uint32_t
mga_get_uint32(
    register uint32_t volatile const *const uint32ptr)
{
    register uint32_t value = *uint32ptr;

    if (!mga_big_endian)
        return (value);

    else
        return (((value & 0xff) << 24) |
            ((value & 0xff00) << 8) |
            ((value & 0xff0000) >> 8) |
            ((value & 0xff000000) >> 24));
}

void
mga_put_uint32(
    register uint32_t volatile *const uint32ptr,
    register uint32_t const value)
{
    register uint32_t newvalue;

    if (!mga_big_endian)
        newvalue = value;
    else
        newvalue = ((value & 0xff) << 24) |
            ((value & 0xff00) << 8) |
            ((value & 0xff0000) >> 8) |
            ((value & 0xff000000) >> 24);

    *uint32ptr = newvalue;
}