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//

//

//    Copyright 2010 TheSeven

//

//

//    This file is part of emCORE.

//

//    emCORE is free software: you can redistribute it and/or

//    modify it under the terms of the GNU General Public License as

//    published by the Free Software Foundation, either version 2 of the

//    License, or (at your option) any later version.

//

//    emCORE is distributed in the hope that it will be useful,

//    but WITHOUT ANY WARRANTY; without even the implied warranty of

//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

//    See the GNU General Public License for more details.

//

//    You should have received a copy of the GNU General Public License along

//    with emCORE.  If not, see <http://www.gnu.org/licenses/>.

//

//

#include "global.h"

#include "thread.h"

#include "s5l8702.h"

#include "util.h"

static struct dma_lli lcd_lli[(LCD_WIDTH * LCD_HEIGHT - 1) / 0xfff]

    IDATA_ATTR __attribute__((aligned(16)));

static uint16_t lcd_color IDATA_ATTR;

static struct mutex lcd_mutex;

void lcd_init()

{

}

int lcd_get_width()

{

    return LCD_WIDTH;

}

int lcd_get_height()

{

    return LCD_HEIGHT;

}

int lcd_get_bytes_per_pixel()

{

    return LCD_BYTESPERPIXEL;

}

int lcd_get_format()

{

    return LCD_FORMAT;

}

static void lcd_send_cmd(uint16_t cmd) ICODE_ATTR __attribute__((noinline));

static void lcd_send_cmd(uint16_t cmd)

{

    while (LCDSTATUS & 0x10);

    LCDWCMD = cmd;

}

static void lcd_send_data(uint16_t data) ICODE_ATTR __attribute__((noinline));

static void lcd_send_data(uint16_t data)

{

    while (LCDSTATUS & 0x10);

    LCDWDATA = (data & 0xff) | ((data & 0x7f00) << 1);

}

static uint32_t lcd_detect() ICODE_ATTR;

static uint32_t lcd_detect()

{

    return (PDAT6 & 0x30) >> 4;

}

bool displaylcd_busy() ICODE_ATTR;

bool displaylcd_busy()

{

    return DMAC0C4CONFIG & 1;

}

bool displaylcd_safe()

{

    return !(DMAC0C4CONFIG & 1);

}

void displaylcd_sync() ICODE_ATTR;

void displaylcd_sync()

{

    mutex_lock(&lcd_mutex, TIMEOUT_BLOCK);

    while (displaylcd_busy()) sleep(100);

    mutex_unlock(&lcd_mutex);

}

void displaylcd_setup(unsigned int startx, unsigned int endx,

                      unsigned int starty, unsigned int endy) ICODE_ATTR;

void displaylcd_setup(unsigned int startx, unsigned int endx,

                      unsigned int starty, unsigned int endy)

{

    mutex_lock(&lcd_mutex, TIMEOUT_BLOCK);

    displaylcd_sync();

    if (lcd_detect() & 2)

    {

        lcd_send_cmd(0x210);

        lcd_send_data(startx);

        lcd_send_cmd(0x211);

        lcd_send_data(endx);

        lcd_send_cmd(0x212);

        lcd_send_data(starty);

        lcd_send_cmd(0x213);

        lcd_send_data(endy);

        lcd_send_cmd(0x200);

        lcd_send_data(startx);

        lcd_send_cmd(0x201);

        lcd_send_data(starty);

        lcd_send_cmd(0x202);

    }

    else

    {

        lcd_send_cmd(0x2a);

        lcd_send_data(startx >> 8);

        lcd_send_data(startx & 0xff);

        lcd_send_data(endx >> 8);

        lcd_send_data(endx & 0xff);

        lcd_send_cmd(0x2b);

        lcd_send_data(starty >> 8);

        lcd_send_data(starty & 0xff);

        lcd_send_data(endy >> 8);

        lcd_send_data(endy & 0xff);

        lcd_send_cmd(0x2c);

    }

}

static void displaylcd_dma(void* data, int pixels, bool solid) ICODE_ATTR;

static void displaylcd_dma(void* data, int pixels, bool solid)

{

    int i;

    for (i = -1; i < (int)ARRAYLEN(lcd_lli) && pixels > 0; i++, pixels -= 0xfff)

    {

        bool last = i + 1 >= ARRAYLEN(lcd_lli) || pixels <= 0xfff;

        struct dma_lli* lli = i < 0 ? (struct dma_lli*)((int)&DMAC0C4LLI) : &lcd_lli[i];

        lli->srcaddr = data;

        lli->dstaddr = (void*)((int)&LCDWDATA);

        lli->nextlli = last ? NULL : &lcd_lli[i + 1];

        lli->control = 0x70240000 | (last ? pixels : 0xfff)

                     | (last ? 0x80000000 : 0) | (solid ? 0 : 0x4000000);

        data = (void*)(((uint32_t)data) + 0x1ffe);

    }

    clean_dcache();

    DMAC0C4CONFIG = 0x88c1;

}

void displaylcd_native(unsigned int startx, unsigned int endx,

                       unsigned int starty, unsigned int endy, void* data)

{

    int pixels = (endx - startx + 1) * (endy - starty + 1);

    if (pixels <= 0) return;

    displaylcd_setup(startx, endx, starty, endy);

    displaylcd_dma(data, pixels, false);

    mutex_unlock(&lcd_mutex);

}

void filllcd_native(unsigned int startx, unsigned int endx,

                    unsigned int starty, unsigned int endy, int color)

{

    int pixels = (endx - startx + 1) * (endy - starty + 1);

    if (pixels <= 0) return;

    displaylcd_setup(startx, endx, starty, endy);

    lcd_color = color;

    displaylcd_dma(&lcd_color, pixels, true);

    mutex_unlock(&lcd_mutex);

}

void displaylcd_dither(unsigned int x, unsigned int y, unsigned int width,

                       unsigned int height, void* data, unsigned int datax,

                       unsigned int datay, unsigned int stride, bool solid) ICODE_ATTR;

void displaylcd_dither(unsigned int x, unsigned int y, unsigned int width,

                       unsigned int height, void* data, unsigned int datax,

                       unsigned int datay, unsigned int stride, bool solid)

{

    int pixels = width * height;

    if (pixels <= 0) return;

    displaylcd_setup(x, x + width - 1, y, y + height - 1);

    int corrsize = width * 3;

    signed char* corr = (signed char*)malloc(corrsize);

    if (!corr)

    {

        mutex_unlock(&lcd_mutex);

        return;

    }

    memset(corr, 0, corrsize);

    unsigned char* in = (unsigned char*)data + (stride * datay + datax) * 3;

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

    {

        int i;

        signed char* corrptr = corr;

        signed char lastcorr[3] = {0};

        for (x = 0; x < width; x++)

        {

            unsigned int pixel = 0;

            signed char* lastcorrptr = lastcorr;

            int orig = *in++ + *corrptr + *lastcorrptr;

            orig = MAX(0, MIN(255, orig));

            unsigned int real = orig >> 3;

            pixel |= real << 11;

            int err = orig - ((real << 3) | (real >> 2));

            *corrptr++ = (*lastcorrptr >> 1) + err >> 2;

            *lastcorrptr++ = err >> 1;

            orig = *in++ + *corrptr + *lastcorrptr;

            orig = MAX(0, MIN(255, orig));

            real = orig >> 2;

            pixel |= real << 5;

            err = orig - ((real << 2) | (real >> 4));

            *corrptr++ = (*lastcorrptr >> 1) + err >> 2;

            *lastcorrptr++ = err >> 1;

            orig = *in++ + *corrptr + *lastcorrptr;

            orig = MAX(0, MIN(255, orig));

            real = orig >> 3;

            pixel |= real;

            err = orig - ((real << 3) | (real >> 2));

            *corrptr++ = (*lastcorrptr >> 1) + err >> 2;

            *lastcorrptr++ = err >> 1;

            while (LCDSTATUS & 0x10);

            LCDWDATA = pixel;

            if (solid) in -= 3;

        }

        if (solid) in += stride * 3;

        else in += (stride - width) * 3;

    }

    free(corr);

    mutex_unlock(&lcd_mutex);

}

void displaylcd(unsigned int x, unsigned int y, unsigned int width, unsigned int height,

                void* data, unsigned int datax, unsigned int datay, unsigned int stride)

{

    displaylcd_dither(x, y, width, height, data, datax, datay, stride, false);

}

void filllcd(unsigned int x, unsigned int y, unsigned int width, unsigned int height, int color)

{

    if (width * height <= 0) return;

    mutex_lock(&lcd_mutex, TIMEOUT_BLOCK);

    lcd_color = color;

    displaylcd_dither(x, y, width, height, &lcd_color, 0, 0, 0, true);

    mutex_unlock(&lcd_mutex);

}

void lcd_shutdown()

{

    displaylcd_sync();

    uint32_t type = lcd_detect();

    if (type & 2)

    {

        lcd_send_cmd(0x7);

        lcd_send_data(0x172);

        lcd_send_cmd(0x30);

        lcd_send_data(0x3ff);

        sleep(90000);

        lcd_send_cmd(0x7);

        lcd_send_data(0x120);

        lcd_send_cmd(0x30);

        lcd_send_data(0x0);

        lcd_send_cmd(0x100);

        lcd_send_data(0x780);

        lcd_send_cmd(0x7);

        lcd_send_data(0x0);

        lcd_send_cmd(0x101);

        lcd_send_data(0x260);

        lcd_send_cmd(0x102);

        lcd_send_data(0xa9);

        sleep(30000);

        lcd_send_cmd(0x100);

        lcd_send_data(0x700);

        lcd_send_cmd(0x100);

        lcd_send_data(0x704);

    }

    else if (type == 1)

    {

        lcd_send_cmd(0x28);

        lcd_send_cmd(0x10);

        sleep(100000);

    }

    else

    {

        lcd_send_cmd(0x28);

        sleep(50000);

        lcd_send_cmd(0x10);

        sleep(50000);

    }

}

void INT_DMAC0C4()

{

    DMAC0INTTCCLR = 0x10;

    lcdconsole_callback();

}

int lcd_translate_color(uint8_t alpha, uint8_t red, uint8_t green, uint8_t blue)

    ICODE_ATTR __attribute__((naked, noinline));

int lcd_translate_color(uint8_t alpha, uint8_t red, uint8_t green, uint8_t blue)

{

    asm volatile(

        "cmp r0, #0xff             \n\t"

        "moveq r0, #-1             \n\t"

        "moveq pc, lr              \n\t"

        "cmp r0, #0                \n\t"

        "movne r0, #0xff000000     \n\t"

        "orrne r0, r0, #0xff0000   \n\t"

        "mov r2, r2,lsr#2          \n\t"

        "orr r0, r0, r3,lsr#3      \n\t"

        "mov r1, r1,lsr#3          \n\t"

        "orr r0, r0, r2,lsl#5      \n\t"

        "orr r0, r0, r1,lsl#11     \n\t"

        "mov pc, lr                \n\t"

    );

}