Archipelago » qemu

/*

 * QEMU JAZZ LED emulator.

 *

 * Copyright (c) 2007-2012 Herve Poussineau

 *

 * 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 "qemu-common.h"

#include "console.h"

#include "pixel_ops.h"

#include "trace.h"

#include "sysbus.h"

typedef enum {

    REDRAW_NONE = 0, REDRAW_SEGMENTS = 1, REDRAW_BACKGROUND = 2,

} screen_state_t;

typedef struct LedState {

    SysBusDevice busdev;

    MemoryRegion iomem;

    uint8_t segments;

    DisplayState *ds;

    screen_state_t state;

} LedState;

static uint64_t jazz_led_read(void *opaque, hwaddr addr,

                              unsigned int size)

{

    LedState *s = opaque;

    uint8_t val;

    val = s->segments;

    trace_jazz_led_read(addr, val);

    return val;

}

static void jazz_led_write(void *opaque, hwaddr addr,

                           uint64_t val, unsigned int size)

{

    LedState *s = opaque;

    uint8_t new_val = val & 0xff;

    trace_jazz_led_write(addr, new_val);

    s->segments = new_val;

    s->state |= REDRAW_SEGMENTS;

}

static const MemoryRegionOps led_ops = {

    .read = jazz_led_read,

    .write = jazz_led_write,

    .endianness = DEVICE_NATIVE_ENDIAN,

    .impl.min_access_size = 1,

    .impl.max_access_size = 1,

};

/***********************************************************/

/* jazz_led display */

static void draw_horizontal_line(DisplayState *ds, int posy, int posx1, int posx2, uint32_t color)

{

    uint8_t *d;

    int x, bpp;

    bpp = (ds_get_bits_per_pixel(ds) + 7) >> 3;

    d = ds_get_data(ds) + ds_get_linesize(ds) * posy + bpp * posx1;

    switch(bpp) {

        case 1:

            for (x = posx1; x <= posx2; x++) {

                *((uint8_t *)d) = color;

                d++;

            }

            break;

        case 2:

            for (x = posx1; x <= posx2; x++) {

                *((uint16_t *)d) = color;

                d += 2;

            }

            break;

        case 4:

            for (x = posx1; x <= posx2; x++) {

                *((uint32_t *)d) = color;

                d += 4;

            }

            break;

    }

}

static void draw_vertical_line(DisplayState *ds, int posx, int posy1, int posy2, uint32_t color)

{

    uint8_t *d;

    int y, bpp;

    bpp = (ds_get_bits_per_pixel(ds) + 7) >> 3;

    d = ds_get_data(ds) + ds_get_linesize(ds) * posy1 + bpp * posx;

    switch(bpp) {

        case 1:

            for (y = posy1; y <= posy2; y++) {

                *((uint8_t *)d) = color;

                d += ds_get_linesize(ds);

            }

            break;

        case 2:

            for (y = posy1; y <= posy2; y++) {

                *((uint16_t *)d) = color;

                d += ds_get_linesize(ds);

            }

            break;

        case 4:

            for (y = posy1; y <= posy2; y++) {

                *((uint32_t *)d) = color;

                d += ds_get_linesize(ds);

            }

            break;

    }

}

static void jazz_led_update_display(void *opaque)

{

    LedState *s = opaque;

    DisplayState *ds = s->ds;

    uint8_t *d1;

    uint32_t color_segment, color_led;

    int y, bpp;

    if (s->state & REDRAW_BACKGROUND) {

        /* clear screen */

        bpp = (ds_get_bits_per_pixel(ds) + 7) >> 3;

        d1 = ds_get_data(ds);

        for (y = 0; y < ds_get_height(ds); y++) {

            memset(d1, 0x00, ds_get_width(ds) * bpp);

            d1 += ds_get_linesize(ds);

        }

    }

    if (s->state & REDRAW_SEGMENTS) {

        /* set colors according to bpp */

        switch (ds_get_bits_per_pixel(ds)) {

            case 8:

                color_segment = rgb_to_pixel8(0xaa, 0xaa, 0xaa);

                color_led = rgb_to_pixel8(0x00, 0xff, 0x00);

                break;

            case 15:

                color_segment = rgb_to_pixel15(0xaa, 0xaa, 0xaa);

                color_led = rgb_to_pixel15(0x00, 0xff, 0x00);

                break;

            case 16:

                color_segment = rgb_to_pixel16(0xaa, 0xaa, 0xaa);

                color_led = rgb_to_pixel16(0x00, 0xff, 0x00);

            case 24:

                color_segment = rgb_to_pixel24(0xaa, 0xaa, 0xaa);

                color_led = rgb_to_pixel24(0x00, 0xff, 0x00);

                break;

            case 32:

                color_segment = rgb_to_pixel32(0xaa, 0xaa, 0xaa);

                color_led = rgb_to_pixel32(0x00, 0xff, 0x00);

                break;

            default:

                return;

        }

        /* display segments */

        draw_horizontal_line(ds, 40, 10, 40, (s->segments & 0x02) ? color_segment : 0);

        draw_vertical_line(ds, 10, 10, 40, (s->segments & 0x04) ? color_segment : 0);

        draw_vertical_line(ds, 10, 40, 70, (s->segments & 0x08) ? color_segment : 0);

        draw_horizontal_line(ds, 70, 10, 40, (s->segments & 0x10) ? color_segment : 0);

        draw_vertical_line(ds, 40, 40, 70, (s->segments & 0x20) ? color_segment : 0);

        draw_vertical_line(ds, 40, 10, 40, (s->segments & 0x40) ? color_segment : 0);

        draw_horizontal_line(ds, 10, 10, 40, (s->segments & 0x80) ? color_segment : 0);

        /* display led */

        if (!(s->segments & 0x01))

            color_led = 0; /* black */

        draw_horizontal_line(ds, 68, 50, 50, color_led);

        draw_horizontal_line(ds, 69, 49, 51, color_led);

        draw_horizontal_line(ds, 70, 48, 52, color_led);

        draw_horizontal_line(ds, 71, 49, 51, color_led);

        draw_horizontal_line(ds, 72, 50, 50, color_led);

    }

    s->state = REDRAW_NONE;

    dpy_gfx_update(ds, 0, 0, ds_get_width(ds), ds_get_height(ds));

}

static void jazz_led_invalidate_display(void *opaque)

{

    LedState *s = opaque;

    s->state |= REDRAW_SEGMENTS | REDRAW_BACKGROUND;

}

static void jazz_led_text_update(void *opaque, console_ch_t *chardata)

{

    LedState *s = opaque;

    char buf[2];

    dpy_text_cursor(s->ds, -1, -1);

    qemu_console_resize(s->ds, 2, 1);

    /* TODO: draw the segments */

    snprintf(buf, 2, "%02hhx\n", s->segments);

    console_write_ch(chardata++, 0x00200100 | buf[0]);

    console_write_ch(chardata++, 0x00200100 | buf[1]);

    dpy_text_update(s->ds, 0, 0, 2, 1);

}

static int jazz_led_post_load(void *opaque, int version_id)

{

    /* force refresh */

    jazz_led_invalidate_display(opaque);

    return 0;

}

static const VMStateDescription vmstate_jazz_led = {

    .name = "jazz-led",

    .version_id = 0,

    .minimum_version_id = 0,

    .minimum_version_id_old = 0,

    .post_load = jazz_led_post_load,

    .fields = (VMStateField[]) {

        VMSTATE_UINT8(segments, LedState),

        VMSTATE_END_OF_LIST()

    }

};

static int jazz_led_init(SysBusDevice *dev)

{

    LedState *s = FROM_SYSBUS(LedState, dev);

    memory_region_init_io(&s->iomem, &led_ops, s, "led", 1);

    sysbus_init_mmio(dev, &s->iomem);

    s->ds = graphic_console_init(jazz_led_update_display,

                                 jazz_led_invalidate_display,

                                 NULL,

                                 jazz_led_text_update, s);

    return 0;

}

static void jazz_led_reset(DeviceState *d)

{

    LedState *s = DO_UPCAST(LedState, busdev.qdev, d);

    s->segments = 0;

    s->state = REDRAW_SEGMENTS | REDRAW_BACKGROUND;

    qemu_console_resize(s->ds, 60, 80);

}

static void jazz_led_class_init(ObjectClass *klass, void *data)

{

    DeviceClass *dc = DEVICE_CLASS(klass);

    SysBusDeviceClass *k = SYS_BUS_DEVICE_CLASS(klass);

    k->init = jazz_led_init;

    dc->desc = "Jazz LED display",

    dc->vmsd = &vmstate_jazz_led;

    dc->reset = jazz_led_reset;

}

static TypeInfo jazz_led_info = {

    .name          = "jazz-led",

    .parent        = TYPE_SYS_BUS_DEVICE,

    .instance_size = sizeof(LedState),

    .class_init    = jazz_led_class_init,

};

static void jazz_led_register(void)

{

    type_register_static(&jazz_led_info);

}

type_init(jazz_led_register);