Subversion Repositories freemyipod

//

//

//    Copyright 2010 TheSeven

//

//

//    This file is part of emBIOS.

//

//    emBIOS 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.

//

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

//

//

#include "global.h"

#include "thread.h"

#include "s5l8720.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;

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;

}

static void lcd_send_cmd(uint16_t cmd)

{

    while (LCDSTATUS & 0x10);

    LCDWCMD = cmd;

}

static void lcd_send_data(uint16_t data)

{

    while (LCDSTATUS & 0x10);

    LCDWDATA = data;

}

void lcd_shutdown()

{

}

bool displaylcd_busy()

{

    return DMAC0C0CONFIG & 1;

}

bool displaylcd_safe()

{

    return !(DMAC0C0CONFIG & 1);

}

void displaylcd_sync()

{

    while (displaylcd_busy()) sleep(100);

}

void displaylcd(unsigned int startx, unsigned int endx,

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

{

    displaylcd_sync();

    lcd_send_cmd(0x2a);

    lcd_send_data(((startx & 0x7f00) << 1) | (startx & 0xff));

    lcd_send_data(((endx & 0x7f00) << 1) | (endx & 0xff));

    lcd_send_cmd(0x2b);

    lcd_send_data(((starty & 0x7f00) << 1) | (starty & 0xff));

    lcd_send_data(((endy & 0x7f00) << 1) | (endy & 0xff));

    lcd_send_cmd(0x2c);

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

    int i;

    bool solid = (int)data == -1;

    if (solid) lcd_color = color;

    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)&DMAC0C0LLI) : &lcd_lli[i];

        lli->srcaddr = solid ? &lcd_color : 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();

    DMAC0C0CONFIG = 0x88c1;

}

void INT_DMAC0C0()

{

    DMAC0INTTCCLR = 1;

    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"

    );

}