/*

 * QEMU JAZZ LED emulator.

 *

 * Copyright (c) 2007 Hervé 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 "hw.h"

#include "mips.h"

#include "console.h"

#include "pixel_ops.h"

//#define DEBUG_LED

typedef enum {

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

} screen_state_t;

typedef struct LedState {

    uint8_t segments;

    DisplayState *ds;

    QEMUConsole *console;

    screen_state_t state;

} LedState;

static uint32_t led_readb(void *opaque, target_phys_addr_t addr)

{

    LedState *s = opaque;

    uint32_t val;

    switch (addr) {

        case 0:

            val = s->segments;

            break;

        default:

#ifdef DEBUG_LED

            printf("jazz led: invalid read [0x%x]\n", relative_addr);

#endif

            val = 0;

    }

    return val;

}

static uint32_t led_readw(void *opaque, target_phys_addr_t addr)

{

    uint32_t v;

#ifdef TARGET_WORDS_BIGENDIAN

    v = led_readb(opaque, addr) << 8;

    v |= led_readb(opaque, addr + 1);

#else

    v = led_readb(opaque, addr);

    v |= led_readb(opaque, addr + 1) << 8;

#endif

    return v;

}

static uint32_t led_readl(void *opaque, target_phys_addr_t addr)

{

    uint32_t v;

#ifdef TARGET_WORDS_BIGENDIAN

    v = led_readb(opaque, addr) << 24;

    v |= led_readb(opaque, addr + 1) << 16;

    v |= led_readb(opaque, addr + 2) << 8;

    v |= led_readb(opaque, addr + 3);

#else

    v = led_readb(opaque, addr);

    v |= led_readb(opaque, addr + 1) << 8;

    v |= led_readb(opaque, addr + 2) << 16;

    v |= led_readb(opaque, addr + 3) << 24;

#endif

    return v;

}

static void led_writeb(void *opaque, target_phys_addr_t addr, uint32_t val)

{

    LedState *s = opaque;

    switch (addr) {

        case 0:

            s->segments = val;

            s->state |= REDRAW_SEGMENTS;

            break;

        default:

#ifdef DEBUG_LED

            printf("jazz led: invalid write of 0x%02x at [0x%x]\n", val, relative_addr);

#endif

            break;

    }

}

static void led_writew(void *opaque, target_phys_addr_t addr, uint32_t val)

{

#ifdef TARGET_WORDS_BIGENDIAN

    led_writeb(opaque, addr, (val >> 8) & 0xff);

    led_writeb(opaque, addr + 1, val & 0xff);

#else

    led_writeb(opaque, addr, val & 0xff);

    led_writeb(opaque, addr + 1, (val >> 8) & 0xff);

#endif

}

static void led_writel(void *opaque, target_phys_addr_t addr, uint32_t val)

{

#ifdef TARGET_WORDS_BIGENDIAN

    led_writeb(opaque, addr, (val >> 24) & 0xff);

    led_writeb(opaque, addr + 1, (val >> 16) & 0xff);

    led_writeb(opaque, addr + 2, (val >> 8) & 0xff);

    led_writeb(opaque, addr + 3, val & 0xff);

#else

    led_writeb(opaque, addr, val & 0xff);

    led_writeb(opaque, addr + 1, (val >> 8) & 0xff);

    led_writeb(opaque, addr + 2, (val >> 16) & 0xff);

    led_writeb(opaque, addr + 3, (val >> 24) & 0xff);

#endif

}

static CPUReadMemoryFunc *led_read[3] = {

    led_readb,

    led_readw,

    led_readl,

};

static CPUWriteMemoryFunc *led_write[3] = {

    led_writeb,

    led_writew,

    led_writel,

};

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

/* 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_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_screen_dump(void *opaque, const char *filename)

{

    printf("jazz_led_screen_dump() not implemented\n");

}

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

{

    LedState *s = opaque;

    char buf[2];

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

    qemu_console_resize(s->console, 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_update(s->ds, 0, 0, 2, 1);

}

void jazz_led_init(DisplayState *ds, target_phys_addr_t base)

{

    LedState *s;

    int io;

    s = qemu_mallocz(sizeof(LedState));

    if (!s)

        return;

    s->ds = ds;

    s->state = REDRAW_SEGMENTS | REDRAW_BACKGROUND;

    io = cpu_register_io_memory(0, led_read, led_write, s);

    cpu_register_physical_memory(base, 1, io);

    s->console = graphic_console_init(ds, jazz_led_update_display,

                                     jazz_led_invalidate_display,

                                     jazz_led_screen_dump,

                                     jazz_led_text_update, s);

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

}