298 lines
9.0 KiB
C
298 lines
9.0 KiB
C
/*
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* This file is part of Luma3DS
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* Copyright (C) 2016 Aurora Wright, TuxSH
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*
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* This program is free software: you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation, either version 3 of the License, or
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* (at your option) any later version.
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*
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* This program 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. See the
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* 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
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*
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* Additional Terms 7.b of GPLv3 applies to this file: Requiring preservation of specified
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* reasonable legal notices or author attributions in that material or in the Appropriate Legal
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* Notices displayed by works containing it.
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*/
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/*
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* Screen init code by dark_samus, bil1s, Normmatt, delebile and others
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* Screen deinit code by tiniVi
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*/
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/*
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* About cache coherency:
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*
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* Flushing the data cache for all memory regions read from/written to by both processors is mandatory on the ARM9 processor.
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* Thus, we make sure there'll be a cache miss on the ARM9 next time it's read.
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* Otherwise the ARM9 won't see the changes made and things will break.
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*
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* On the ARM11, in the environment we're in, the MMU isn't enabled and nothing is cached.
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*/
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#include "screen.h"
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#include "config.h"
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#include "memory.h"
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#include "cache.h"
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#include "i2c.h"
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#include "utils.h"
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vu32 *arm11Entry = (vu32 *)BRAHMA_ARM11_ENTRY;
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static const u32 brightness[4] = {0x5F, 0x4C, 0x39, 0x26};
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void __attribute__((naked)) arm11Stub(void)
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{
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//Wait for the entry to be set
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while(*arm11Entry == ARM11_STUB_ADDRESS);
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//Jump to it
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((void (*)())*arm11Entry)();
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}
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static void invokeArm11Function(void (*func)())
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{
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static bool hasCopiedStub = false;
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if(!hasCopiedStub)
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{
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memcpy((void *)ARM11_STUB_ADDRESS, arm11Stub, 0x30);
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hasCopiedStub = true;
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}
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*arm11Entry = (u32)func;
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while(*arm11Entry);
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*arm11Entry = ARM11_STUB_ADDRESS;
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}
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void deinitScreens(void)
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{
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void __attribute__((naked)) ARM11(void)
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{
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//Disable interrupts
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__asm(".word 0xF10C01C0");
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//Shutdown LCDs
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*(vu32 *)0x10202A44 = 0;
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*(vu32 *)0x10202244 = 0;
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*(vu32 *)0x10202014 = 0;
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WAIT_FOR_ARM9();
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}
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if(ARESCREENSINITED) invokeArm11Function(ARM11);
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}
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void updateBrightness(u32 brightnessIndex)
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{
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static u32 brightnessLevel;
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brightnessLevel = brightness[brightnessIndex];
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void __attribute__((naked)) ARM11(void)
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{
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//Disable interrupts
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__asm(".word 0xF10C01C0");
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//Change brightness
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*(vu32 *)0x10202240 = brightnessLevel;
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*(vu32 *)0x10202A40 = brightnessLevel;
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WAIT_FOR_ARM9();
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}
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flushDCacheRange(&brightnessLevel, 4);
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invokeArm11Function(ARM11);
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}
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void swapFramebuffers(bool isAlternate)
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{
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static u32 isAlternateTmp;
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isAlternateTmp = isAlternate ? 1 : 0;
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void __attribute__((naked)) ARM11(void)
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{
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//Disable interrupts
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__asm(".word 0xF10C01C0");
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*(vu32 *)0x10400478 = (*(vu32 *)0x10400478 & 0xFFFFFFFE) | isAlternateTmp;
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*(vu32 *)0x10400578 = (*(vu32 *)0x10400478 & 0xFFFFFFFE) | isAlternateTmp;
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WAIT_FOR_ARM9();
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}
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flushDCacheRange(&isAlternateTmp, 4);
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invokeArm11Function(ARM11);
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}
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void clearScreens(bool isAlternate)
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{
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static volatile struct fb *fbTmp;
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fbTmp = isAlternate ? &fbs[1] : &fbs[0];
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void __attribute__((naked)) ARM11(void)
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{
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//Disable interrupts
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__asm(".word 0xF10C01C0");
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//Setting up two simultaneous memory fills using the GPU
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vu32 *REGs_PSC0 = (vu32 *)0x10400010,
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*REGs_PSC1 = (vu32 *)0x10400020;
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REGs_PSC0[0] = (u32)fbTmp->top_left >> 3; //Start address
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REGs_PSC0[1] = (u32)(fbTmp->top_left + SCREEN_TOP_FBSIZE) >> 3; //End address
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REGs_PSC0[2] = 0; //Fill value
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REGs_PSC0[3] = (2 << 8) | 1; //32-bit pattern; start
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REGs_PSC1[0] = (u32)fbTmp->bottom >> 3; //Start address
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REGs_PSC1[1] = (u32)(fbTmp->bottom + SCREEN_BOTTOM_FBSIZE) >> 3; //End address
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REGs_PSC1[2] = 0; //Fill value
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REGs_PSC1[3] = (2 << 8) | 1; //32-bit pattern; start
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while(!((REGs_PSC0[3] & 2) && (REGs_PSC1[3] & 2)));
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WAIT_FOR_ARM9();
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}
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flushDCacheRange((void *)fbTmp, sizeof(struct fb));
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flushDCacheRange(&fbTmp, 4);
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invokeArm11Function(ARM11);
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}
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void initScreens(void)
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{
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void __attribute__((naked)) initSequence(void)
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{
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//Disable interrupts
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__asm(".word 0xF10C01C0");
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u32 brightnessLevel = brightness[MULTICONFIG(BRIGHTNESS)];
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*(vu32 *)0x10141200 = 0x1007F;
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*(vu32 *)0x10202014 = 0x00000001;
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*(vu32 *)0x1020200C &= 0xFFFEFFFE;
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*(vu32 *)0x10202240 = brightnessLevel;
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*(vu32 *)0x10202A40 = brightnessLevel;
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*(vu32 *)0x10202244 = 0x1023E;
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*(vu32 *)0x10202A44 = 0x1023E;
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//Top screen
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*(vu32 *)0x10400400 = 0x000001c2;
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*(vu32 *)0x10400404 = 0x000000d1;
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*(vu32 *)0x10400408 = 0x000001c1;
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*(vu32 *)0x1040040c = 0x000001c1;
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*(vu32 *)0x10400410 = 0x00000000;
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*(vu32 *)0x10400414 = 0x000000cf;
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*(vu32 *)0x10400418 = 0x000000d1;
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*(vu32 *)0x1040041c = 0x01c501c1;
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*(vu32 *)0x10400420 = 0x00010000;
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*(vu32 *)0x10400424 = 0x0000019d;
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*(vu32 *)0x10400428 = 0x00000002;
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*(vu32 *)0x1040042c = 0x00000192;
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*(vu32 *)0x10400430 = 0x00000192;
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*(vu32 *)0x10400434 = 0x00000192;
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*(vu32 *)0x10400438 = 0x00000001;
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*(vu32 *)0x1040043c = 0x00000002;
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*(vu32 *)0x10400440 = 0x01960192;
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*(vu32 *)0x10400444 = 0x00000000;
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*(vu32 *)0x10400448 = 0x00000000;
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*(vu32 *)0x1040045C = 0x00f00190;
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*(vu32 *)0x10400460 = 0x01c100d1;
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*(vu32 *)0x10400464 = 0x01920002;
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*(vu32 *)0x10400468 = 0x18300000;
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*(vu32 *)0x10400470 = 0x80341;
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*(vu32 *)0x10400474 = 0x00010501;
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*(vu32 *)0x10400478 = 0;
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*(vu32 *)0x10400490 = 0x000002D0;
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*(vu32 *)0x1040049C = 0x00000000;
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//Disco register
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for(u32 i = 0; i < 256; i++)
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*(vu32 *)0x10400484 = 0x10101 * i;
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//Bottom screen
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*(vu32 *)0x10400500 = 0x000001c2;
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*(vu32 *)0x10400504 = 0x000000d1;
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*(vu32 *)0x10400508 = 0x000001c1;
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*(vu32 *)0x1040050c = 0x000001c1;
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*(vu32 *)0x10400510 = 0x000000cd;
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*(vu32 *)0x10400514 = 0x000000cf;
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*(vu32 *)0x10400518 = 0x000000d1;
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*(vu32 *)0x1040051c = 0x01c501c1;
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*(vu32 *)0x10400520 = 0x00010000;
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*(vu32 *)0x10400524 = 0x0000019d;
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*(vu32 *)0x10400528 = 0x00000052;
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*(vu32 *)0x1040052c = 0x00000192;
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*(vu32 *)0x10400530 = 0x00000192;
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*(vu32 *)0x10400534 = 0x0000004f;
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*(vu32 *)0x10400538 = 0x00000050;
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*(vu32 *)0x1040053c = 0x00000052;
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*(vu32 *)0x10400540 = 0x01980194;
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*(vu32 *)0x10400544 = 0x00000000;
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*(vu32 *)0x10400548 = 0x00000011;
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*(vu32 *)0x1040055C = 0x00f00140;
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*(vu32 *)0x10400560 = 0x01c100d1;
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*(vu32 *)0x10400564 = 0x01920052;
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*(vu32 *)0x10400568 = 0x18300000 + 0x46500;
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*(vu32 *)0x10400570 = 0x80301;
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*(vu32 *)0x10400574 = 0x00010501;
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*(vu32 *)0x10400578 = 0;
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*(vu32 *)0x10400590 = 0x000002D0;
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*(vu32 *)0x1040059C = 0x00000000;
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//Disco register
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for(u32 i = 0; i < 256; i++)
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*(vu32 *)0x10400584 = 0x10101 * i;
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WAIT_FOR_ARM9();
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}
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//Set CakeBrah framebuffers
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void __attribute__((naked)) setupFramebuffers(void)
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{
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//Disable interrupts
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__asm(".word 0xF10C01C0");
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fbs[0].top_left = (u8 *)0x18300000;
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fbs[1].top_left = (u8 *)0x18400000;
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fbs[0].top_right = (u8 *)0x18300000;
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fbs[1].top_right = (u8 *)0x18400000;
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fbs[0].bottom = (u8 *)0x18346500;
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fbs[1].bottom = (u8 *)0x18446500;
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*(vu32 *)0x10400468 = (u32)fbs[0].top_left;
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*(vu32 *)0x1040046c = (u32)fbs[1].top_left;
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*(vu32 *)0x10400494 = (u32)fbs[0].top_right;
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*(vu32 *)0x10400498 = (u32)fbs[1].top_right;
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*(vu32 *)0x10400568 = (u32)fbs[0].bottom;
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*(vu32 *)0x1040056c = (u32)fbs[1].bottom;
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WAIT_FOR_ARM9();
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}
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static bool needToSetup = true;
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if(needToSetup)
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{
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if(!ARESCREENSINITED)
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{
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flushDCacheRange(&configData, sizeof(CfgData));
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invokeArm11Function(initSequence);
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//Turn on backlight
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i2cWriteRegister(I2C_DEV_MCU, 0x22, 0x2A);
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wait(true, 3ULL);
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}
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else updateBrightness(MULTICONFIG(BRIGHTNESS));
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flushDCacheRange((void *)fbs, 2 * sizeof(struct fb));
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invokeArm11Function(setupFramebuffers);
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needToSetup = false;
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}
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clearScreens(false);
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swapFramebuffers(false);
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} |