mini/irq.c
2009-05-15 05:35:17 -07:00

124 lines
2.7 KiB
C

/*
mini - a Free Software replacement for the Nintendo/BroadOn IOS.
IRQ support
Copyright (C) 2008, 2009 Hector Martin "marcan" <marcan@marcansoft.com>
Copyright (C) 2008, 2009 Sven Peter <svenpeter@gmail.com>
Copyright (C) 2009 Andre Heider "dhewg" <dhewg@wiibrew.org>
# This code is licensed to you under the terms of the GNU GPL, version 2;
# see file COPYING or http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt
*/
#include "irq.h"
#include "hollywood.h"
#include "gecko.h"
#include "utils.h"
#include "ipc.h"
#include "crypto.h"
#include "nand.h"
#include "sdhcvar.h"
static u32 _alarm_frequency = 0;
void irq_setup_stack(void);
void irq_initialize(void)
{
irq_setup_stack();
write32(HW_ARMIRQMASK, 0);
write32(HW_ARMIRQFLAG, 0xffffffff);
irq_restore(CPSR_FIQDIS);
//???
write32(HW_ARMIRQMASK+0x04, 0);
write32(HW_ARMIRQMASK+0x20, 0);
write32(HW_ALARM, 0);
}
void irq_shutdown(void)
{
write32(HW_ARMIRQMASK, 0);
write32(HW_ARMIRQFLAG, 0xffffffff);
irq_kill();
}
void irq_handler(void)
{
u32 enabled = read32(HW_ARMIRQMASK);
u32 flags = read32(HW_ARMIRQFLAG);
//gecko_printf("In IRQ handler: 0x%08x 0x%08x 0x%08x\n", enabled, flags, flags & enabled);
flags = flags & enabled;
if(flags & IRQF_TIMER) {
if (_alarm_frequency) {
// currently we use the alarm timer only for lame usbgecko polling
gecko_timer();
write32(HW_ALARM, read32(HW_TIMER) + _alarm_frequency);
}
write32(HW_ARMIRQFLAG, IRQF_TIMER);
}
if(flags & IRQF_NAND) {
// gecko_printf("IRQ: NAND\n");
write32(NAND_CMD, 0x7fffffff); // shut it up
write32(HW_ARMIRQFLAG, IRQF_NAND);
nand_irq();
}
if(flags & IRQF_GPIO1B) {
// gecko_printf("IRQ: GPIO1B\n");
write32(HW_GPIO1BINTFLAG, 0xFFFFFF); // shut it up
write32(HW_ARMIRQFLAG, IRQF_GPIO1B);
}
if(flags & IRQF_GPIO1) {
// gecko_printf("IRQ: GPIO1\n");
write32(HW_GPIO1INTFLAG, 0xFFFFFF); // shut it up
write32(HW_ARMIRQFLAG, IRQF_GPIO1);
}
if(flags & IRQF_RESET) {
// gecko_printf("IRQ: RESET\n");
write32(HW_ARMIRQFLAG, IRQF_RESET);
}
if(flags & IRQF_IPC) {
//gecko_printf("IRQ: IPC\n");
ipc_irq();
write32(HW_ARMIRQFLAG, IRQF_IPC);
}
if(flags & IRQF_AES) {
// gecko_printf("IRQ: AES\n");
write32(HW_ARMIRQFLAG, IRQF_AES);
}
if (flags & IRQF_SDHC) {
// gecko_printf("IRQ: SDHC\n");
write32(HW_ARMIRQFLAG, IRQF_SDHC);
sdhc_irq();
}
flags &= ~IRQF_ALL;
if(flags) {
gecko_printf("IRQ: unknown 0x%08x\n", flags);
write32(HW_ARMIRQFLAG, flags);
}
}
void irq_enable(u32 irq)
{
set32(HW_ARMIRQMASK, 1<<irq);
}
void irq_disable(u32 irq)
{
clear32(HW_ARMIRQMASK, 1<<irq);
}
void irq_set_alarm(u32 ms, u8 enable)
{
_alarm_frequency = IRQ_ALARM_MS2REG(ms);
if (enable)
write32(HW_ALARM, read32(HW_TIMER) + _alarm_frequency);
}