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273 theseven 1 
//
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//
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//    Copyright 2010 TheSeven
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//
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//
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//    This file is part of emBIOS.
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//
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//    emBIOS is free software: you can redistribute it and/or
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//    modify it under the terms of the GNU General Public License as
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//    published by the Free Software Foundation, either version 2 of the
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//    License, or (at your option) any later version.
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//
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//    emBIOS is distributed in the hope that it will be useful,
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//    but WITHOUT ANY WARRANTY; without even the implied warranty of
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//    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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//    See the GNU General Public License for more details.
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//
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//    You should have received a copy of the GNU General Public License along
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//    with emBIOS.  If not, see <http://www.gnu.org/licenses/>.
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//
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//
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#include "global.h"
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#include "thread.h"
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#include "s5l8702.h"
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#include "util.h"
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278 theseven 30 
static struct dma_lli lcd_lli[(LCD_WIDTH * LCD_HEIGHT - 1) / 0xfff]
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    IDATA_ATTR __attribute__((aligned(16)));
273 theseven 32 
 
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static uint16_t lcd_color IDATA_ATTR;
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void lcd_init()
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{
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}
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int lcd_get_width()
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{
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    return LCD_WIDTH;
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}
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int lcd_get_height()
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{
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    return LCD_HEIGHT;
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}
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int lcd_get_bytes_per_pixel()
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{
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    return LCD_BYTESPERPIXEL;
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}
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static void lcd_send_cmd(uint16_t cmd)
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{
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    while (LCDSTATUS & 0x10);
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    LCDWCMD = cmd;
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}
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static void lcd_send_data(uint16_t data)
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{
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    while (LCDSTATUS & 0x10);
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    LCDWDATA = data;
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}
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static uint32_t lcd_detect()
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{
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    return (PDAT6 & 0x30) >> 4;
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}
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bool displaylcd_busy()
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{
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    return DMAC0C0CONFIG & 1;
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}
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bool displaylcd_safe()
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{
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    return !(DMAC0C0CONFIG & 1);
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}
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void displaylcd_sync()
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{
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    while (displaylcd_busy()) sleep(100);
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}
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void displaylcd(unsigned int startx, unsigned int endx,
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                unsigned int starty, unsigned int endy, void* data, int color)
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{
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    displaylcd_sync();
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    if (lcd_detect() == 3)
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    {
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        lcd_send_cmd(0x210);
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        lcd_send_data(startx);
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        lcd_send_cmd(0x211);
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        lcd_send_data(endx);
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        lcd_send_cmd(0x212);
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        lcd_send_data(starty);
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        lcd_send_cmd(0x213);
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        lcd_send_data(endy);
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        lcd_send_cmd(0x200);
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        lcd_send_data(startx);
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        lcd_send_cmd(0x201);
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        lcd_send_data(starty);
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        lcd_send_cmd(0x202);
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    }
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    else
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    {
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        lcd_send_cmd(0x2a);
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        lcd_send_data(startx >> 8);
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        lcd_send_data(startx & 0xff);
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        lcd_send_data(endx >> 8);
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        lcd_send_data(endx & 0xff);
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        lcd_send_cmd(0x2b);
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        lcd_send_data(starty >> 8);
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        lcd_send_data(starty & 0xff);
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        lcd_send_data(endy >> 8);
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        lcd_send_data(endy & 0xff);
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        lcd_send_cmd(0x2c);
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    }
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    int pixels = (endx - startx + 1) * (endy - starty + 1);
278 theseven 122 
    if (pixels <= 0) return;
273 theseven 123 
    int i;
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    bool solid = (int)data == -1;
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    if (solid) lcd_color = color;
278 theseven 126 
    for (i = -1; i < (int)ARRAYLEN(lcd_lli) && pixels > 0; i++, pixels -= 0xfff)
273 theseven 127 
    {
278 theseven 128 
        bool last = i + 1 >= ARRAYLEN(lcd_lli) || pixels <= 0xfff;
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        struct dma_lli* lli = i < 0 ? (struct dma_lli*)((int)&DMAC0C0LLI) : &lcd_lli[i];
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        lli->srcaddr = solid ? &lcd_color : data;
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        lli->dstaddr = (void*)((int)&LCDWDATA);
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        lli->nextlli = last ? NULL : &lcd_lli[i + 1];
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        lli->control = 0x70240000 | (last ? pixels : 0xfff)
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                     | (last ? 0x80000000 : 0) | (solid ? 0 : 0x4000000);
273 theseven 135 
        data = (void*)(((uint32_t)data) + 0x1ffe);
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    }
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    clean_dcache();
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    DMAC0C0CONFIG = 0x88c1;
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}
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309 theseven 141 
void lcd_shutdown()
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{
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    displaylcd_sync();
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    // TODO: Shut down properly
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}
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273 theseven 147 
void INT_DMAC0C0()
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{
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    DMAC0INTTCCLR = 1;
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    lcdconsole_callback();
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}
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int lcd_translate_color(uint8_t alpha, uint8_t red, uint8_t green, uint8_t blue)
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    ICODE_ATTR __attribute__((naked, noinline));
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int lcd_translate_color(uint8_t alpha, uint8_t red, uint8_t green, uint8_t blue)
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{
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    asm volatile(
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        "cmp r0, #0xff             \n\t"
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        "moveq r0, #-1             \n\t"
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        "moveq pc, lr              \n\t"
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        "cmp r0, #0                \n\t"
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        "movne r0, #0xff000000     \n\t"
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        "orrne r0, r0, #0xff0000   \n\t"
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        "mov r2, r2,lsr#2          \n\t"
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        "orr r0, r0, r3,lsr#3      \n\t"
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        "mov r1, r1,lsr#3          \n\t"
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        "orr r0, r0, r2,lsl#5      \n\t"
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        "orr r0, r0, r1,lsl#11     \n\t"
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        "mov pc, lr                \n\t"
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    );
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}