Archipelago » qemu

/*

 * Syborg Framebuffer

 *

 * Copyright (c) 2009 CodeSourcery

 *

 * 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 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 "sysbus.h"

#include "console.h"

#include "syborg.h"

#include "framebuffer.h"

//#define DEBUG_SYBORG_FB

#ifdef DEBUG_SYBORG_FB

#define DPRINTF(fmt, ...) \

do { printf("syborg_fb: " fmt , ## __VA_ARGS__); } while (0)

#define BADF(fmt, ...) \

do { fprintf(stderr, "syborg_fb: error: " fmt , ## __VA_ARGS__); \

    exit(1);} while (0)

#else

#define DPRINTF(fmt, ...) do {} while(0)

#define BADF(fmt, ...) \

do { fprintf(stderr, "syborg_fb: error: " fmt , ## __VA_ARGS__);} while (0)

#endif

enum {

    FB_ID               = 0,

    FB_BASE             = 1,

    FB_HEIGHT           = 2,

    FB_WIDTH            = 3,

    FB_ORIENTATION      = 4,

    FB_BLANK            = 5,

    FB_INT_MASK         = 6,

    FB_INTERRUPT_CAUSE  = 7,

    FB_BPP              = 8,

    FB_COLOR_ORDER      = 9,

    FB_BYTE_ORDER       = 10,

    FB_PIXEL_ORDER      = 11,

    FB_ROW_PITCH        = 12,

    FB_ENABLED          = 13,

    FB_PALETTE_START    = 0x400 >> 2,

    FB_PALETTE_END   = FB_PALETTE_START+256-1,

};

#define FB_INT_VSYNC            (1U << 0)

#define FB_INT_BASE_UPDATE_DONE (1U << 1)

typedef struct {

    SysBusDevice busdev;

    MemoryRegion iomem;

    DisplayState *ds;

    /*QEMUConsole *console;*/

    uint32_t need_update : 1;

    uint32_t need_int : 1;

    uint32_t enabled : 1;

    uint32_t int_status;

    uint32_t int_enable;

    qemu_irq irq;

    uint32_t base;

    uint32_t pitch;

    uint32_t rows;

    uint32_t cols;

    int blank;

    int bpp;

    int rgb; /* 0 = BGR, 1 = RGB */

    int endian; /* 0 = Little, 1 = Big */

    uint32_t raw_palette[256];

    uint32_t palette[256];

} SyborgFBState;

enum {

    BPP_SRC_1,

    BPP_SRC_2,

    BPP_SRC_4,

    BPP_SRC_8,

    BPP_SRC_16,

    BPP_SRC_32,

    /* TODO: Implement these.  */

    BPP_SRC_15 = -1,

    BPP_SRC_24 = -2

};

#include "pixel_ops.h"

#define BITS 8

#include "pl110_template.h"

#define BITS 15

#include "pl110_template.h"

#define BITS 16

#include "pl110_template.h"

#define BITS 24

#include "pl110_template.h"

#define BITS 32

#include "pl110_template.h"

/* Update interrupts.  */

static void syborg_fb_update(SyborgFBState *s)

{

    if ((s->int_status & s->int_enable) != 0) {

        DPRINTF("Raise IRQ\n");

        qemu_irq_raise(s->irq);

    } else {

        DPRINTF("Lower IRQ\n");

        qemu_irq_lower(s->irq);

    }

}

static int syborg_fb_enabled(const SyborgFBState *s)

{

    return s->enabled;

}

static void syborg_fb_update_palette(SyborgFBState *s)

{

    int n, i;

    uint32_t raw;

    unsigned int r, g, b;

    switch (s->bpp) {

    case BPP_SRC_1: n = 2; break;

    case BPP_SRC_2: n = 4; break;

    case BPP_SRC_4: n = 16; break;

    case BPP_SRC_8: n = 256; break;

    default: return;

    }

    for (i = 0; i < n; i++) {

        raw = s->raw_palette[i];

        r = (raw >> 16) & 0xff;

        g = (raw >> 8) & 0xff;

        b = raw & 0xff;

        switch (ds_get_bits_per_pixel(s->ds)) {

        case 8:

            s->palette[i] = rgb_to_pixel8(r, g, b);

            break;

        case 15:

            s->palette[i] = rgb_to_pixel15(r, g, b);

            break;

        case 16:

            s->palette[i] = rgb_to_pixel16(r, g, b);

            break;

        case 24:

        case 32:

            s->palette[i] = rgb_to_pixel32(r, g, b);

            break;

        default:

            abort();

        }

    }

}

static void syborg_fb_update_display(void *opaque)

{

    SyborgFBState *s = (SyborgFBState *)opaque;

    drawfn* fntable;

    drawfn fn;

    int dest_width;

    int src_width;

    int bpp_offset;

    int first;

    int last;

    if (!syborg_fb_enabled(s))

        return;

    switch (ds_get_bits_per_pixel(s->ds)) {

    case 0:

        return;

    case 8:

        fntable = pl110_draw_fn_8;

        dest_width = 1;

        break;

    case 15:

        fntable = pl110_draw_fn_15;

        dest_width = 2;

        break;

    case 16:

        fntable = pl110_draw_fn_16;

        dest_width = 2;

        break;

    case 24:

        fntable = pl110_draw_fn_24;

        dest_width = 3;

        break;

    case 32:

        fntable = pl110_draw_fn_32;

        dest_width = 4;

        break;

    default:

        fprintf(stderr, "syborg_fb: Bad color depth\n");

        exit(1);

    }

    if (s->need_int) {

        s->int_status |= FB_INT_BASE_UPDATE_DONE;

        syborg_fb_update(s);

        s->need_int = 0;

    }

    if (s->rgb) {

        bpp_offset = 24;

    } else {

        bpp_offset = 0;

    }

    if (s->endian) {

        bpp_offset += 8;

    }

    /* Our bpp constants mostly match the PL110/PL111 but

     * not for the 16 bit case

     */

    switch (s->bpp) {

    case BPP_SRC_16:

        bpp_offset += 6;

        break;

    default:

        bpp_offset += s->bpp;

    }

    fn = fntable[bpp_offset];

    if (s->pitch) {

        src_width = s->pitch;

    } else {

        src_width = s->cols;

        switch (s->bpp) {

        case BPP_SRC_1:

            src_width >>= 3;

            break;

        case BPP_SRC_2:

            src_width >>= 2;

            break;

        case BPP_SRC_4:

            src_width >>= 1;

            break;

        case BPP_SRC_8:

            break;

        case BPP_SRC_15:

        case BPP_SRC_16:

            src_width <<= 1;

            break;

        case BPP_SRC_24:

            src_width *= 3;

            break;

        case BPP_SRC_32:

            src_width <<= 2;

            break;

        }

    }

    dest_width *= s->cols;

    first = 0;

    /* TODO: Implement blanking.  */

    if (!s->blank) {

        if (s->need_update && s->bpp <= BPP_SRC_8) {

            syborg_fb_update_palette(s);

        }

        framebuffer_update_display(s->ds,

                                   s->base, s->cols, s->rows,

                                   src_width, dest_width, 0,

                                   s->need_update,

                                   fn, s->palette,

                                   &first, &last);

        if (first >= 0) {

            dpy_update(s->ds, 0, first, s->cols, last - first + 1);

        }

        s->int_status |= FB_INT_VSYNC;

        syborg_fb_update(s);

    }

    s->need_update = 0;

}

static void syborg_fb_invalidate_display(void * opaque)

{

    SyborgFBState *s = (SyborgFBState *)opaque;

    s->need_update = 1;

}

static uint64_t syborg_fb_read(void *opaque, target_phys_addr_t offset,

                               unsigned size)

{

    SyborgFBState *s = opaque;

    DPRINTF("read reg %d\n", (int)offset);

    offset &= 0xfff;

    switch (offset >> 2) {

    case FB_ID:

        return SYBORG_ID_FRAMEBUFFER;

    case FB_BASE:

        return s->base;

    case FB_HEIGHT:

        return s->rows;

    case FB_WIDTH:

        return s->cols;

    case FB_ORIENTATION:

        return 0;

    case FB_BLANK:

        return s->blank;

    case FB_INT_MASK:

        return s->int_enable;

    case FB_INTERRUPT_CAUSE:

        return s->int_status;

    case FB_BPP:

        switch (s->bpp) {

        case BPP_SRC_1: return 1;

        case BPP_SRC_2: return 2;

        case BPP_SRC_4: return 4;

        case BPP_SRC_8: return 8;

        case BPP_SRC_15: return 15;

        case BPP_SRC_16: return 16;

        case BPP_SRC_24: return 24;

        case BPP_SRC_32: return 32;

        default: return 0;

        }

    case FB_COLOR_ORDER:

        return s->rgb;

    case FB_BYTE_ORDER:

        return s->endian;

    case FB_PIXEL_ORDER:

        return 0;

    case FB_ROW_PITCH:

        return s->pitch;

    case FB_ENABLED:

        return s->enabled;

    default:

        if ((offset >> 2) >= FB_PALETTE_START

            && (offset >> 2) <= FB_PALETTE_END) {

            return s->raw_palette[(offset >> 2) - FB_PALETTE_START];

        } else {

            cpu_abort (cpu_single_env, "syborg_fb_read: Bad offset %x\n",

                         (int)offset);

        }

        return 0;

    }

}

static void syborg_fb_write(void *opaque, target_phys_addr_t offset,

                            uint64_t val, unsigned size)

{

    SyborgFBState *s = opaque;

    DPRINTF("write reg %d = %d\n", (int)offset, val);

    s->need_update = 1;

    offset &= 0xfff;

    switch (offset >> 2) {

    case FB_BASE:

        s->base = val;

        s->need_int = 1;

        s->need_update = 1;

        syborg_fb_update(s);

        break;

    case FB_HEIGHT:

        s->rows = val;

        break;

    case FB_WIDTH:

        s->cols = val;

        break;

    case FB_ORIENTATION:

        /* TODO: Implement rotation.  */

        break;

    case FB_BLANK:

        s->blank = val & 1;

        break;

    case FB_INT_MASK:

        s->int_enable = val;

        syborg_fb_update(s);

        break;

    case FB_INTERRUPT_CAUSE:

        s->int_status &= ~val;

        syborg_fb_update(s);

        break;

    case FB_BPP:

        switch (val) {

        case 1: val = BPP_SRC_1; break;

        case 2: val = BPP_SRC_2; break;

        case 4: val = BPP_SRC_4; break;

        case 8: val = BPP_SRC_8; break;

        /* case 15: val = BPP_SRC_15; break; */

        case 16: val = BPP_SRC_16; break;

        /* case 24: val = BPP_SRC_24; break; */

        case 32: val = BPP_SRC_32; break;

        default: val = s->bpp; break;

        }

        s->bpp = val;

        break;

    case FB_COLOR_ORDER:

        s->rgb = (val != 0);

        break;

    case FB_BYTE_ORDER:

        s->endian = (val != 0);

        break;

    case FB_PIXEL_ORDER:

        /* TODO: Implement this.  */

        break;

    case FB_ROW_PITCH:

        s->pitch = val;

        break;

    case FB_ENABLED:

        s->enabled = val;

        break;

    default:

        if ((offset >> 2) >= FB_PALETTE_START

            && (offset >> 2) <= FB_PALETTE_END) {

            s->raw_palette[(offset >> 2) - FB_PALETTE_START] = val;

        } else {

            cpu_abort (cpu_single_env, "syborg_fb_write: Bad offset %x\n",

                      (int)offset);

        }

        break;

    }

}

static const MemoryRegionOps syborg_fb_ops = {

    .read = syborg_fb_read,

    .write = syborg_fb_write,

    .endianness = DEVICE_NATIVE_ENDIAN,

};

static void syborg_fb_save(QEMUFile *f, void *opaque)

{

    SyborgFBState *s = opaque;

    int i;

    qemu_put_be32(f, s->need_int);

    qemu_put_be32(f, s->int_status);

    qemu_put_be32(f, s->int_enable);

    qemu_put_be32(f, s->enabled);

    qemu_put_be32(f, s->base);

    qemu_put_be32(f, s->pitch);

    qemu_put_be32(f, s->rows);

    qemu_put_be32(f, s->cols);

    qemu_put_be32(f, s->bpp);

    qemu_put_be32(f, s->rgb);

    for (i = 0; i < 256; i++) {

        qemu_put_be32(f, s->raw_palette[i]);

    }

}

static int syborg_fb_load(QEMUFile *f, void *opaque, int version_id)

{

    SyborgFBState *s = opaque;

    int i;

    if (version_id != 1)

        return -EINVAL;

    s->need_int = qemu_get_be32(f);

    s->int_status = qemu_get_be32(f);

    s->int_enable = qemu_get_be32(f);

    s->enabled = qemu_get_be32(f);

    s->base = qemu_get_be32(f);

    s->pitch = qemu_get_be32(f);

    s->rows = qemu_get_be32(f);

    s->cols = qemu_get_be32(f);

    s->bpp = qemu_get_be32(f);

    s->rgb = qemu_get_be32(f);

    for (i = 0; i < 256; i++) {

        s->raw_palette[i] = qemu_get_be32(f);

    }

    s->need_update = 1;

    return 0;

}

static int syborg_fb_init(SysBusDevice *dev)

{

    SyborgFBState *s = FROM_SYSBUS(SyborgFBState, dev);

    sysbus_init_irq(dev, &s->irq);

    memory_region_init_io(&s->iomem, &syborg_fb_ops, s,

                          "framebuffer", 0x1000);

    sysbus_init_mmio_region(dev, &s->iomem);

    s->ds = graphic_console_init(syborg_fb_update_display,

                                 syborg_fb_invalidate_display,

                                 NULL, NULL, s);

    if (s->cols != 0 && s->rows != 0) {

        qemu_console_resize(s->ds, s->cols, s->rows);

    }

    if (!s->cols)

        s->cols = ds_get_width(s->ds);

    if (!s->rows)

        s->rows = ds_get_height(s->ds);

    register_savevm(&dev->qdev, "syborg_framebuffer", -1, 1,

                    syborg_fb_save, syborg_fb_load, s);

    return 0;

}

static SysBusDeviceInfo syborg_fb_info = {

    .init = syborg_fb_init,

    .qdev.name  = "syborg,framebuffer",

    .qdev.size  = sizeof(SyborgFBState),

    .qdev.props = (Property[]) {

        DEFINE_PROP_UINT32("width",  SyborgFBState, cols, 0),

        DEFINE_PROP_UINT32("height", SyborgFBState, rows, 0),

        DEFINE_PROP_END_OF_LIST(),

    }

};

static void syborg_fb_register_devices(void)

{

    sysbus_register_withprop(&syborg_fb_info);

}

device_init(syborg_fb_register_devices)