irq.c

   1 /*
   2         ppcskel - a Free Software replacement for the Nintendo/BroadOn IOS.
   3         IRQ support
   4
   5 Copyright (C) 2008, 2009        Hector Martin "marcan" <marcan@marcansoft.com>
   6 Copyright (C) 2008, 2009        Sven Peter <svenpeter@gmail.com>
   7 Copyright (C) 2009                      Andre Heider "dhewg" <dhewg@wiibrew.org>
   8
   9 # This code is licensed to you under the terms of the GNU GPL, version 2;
  10 # see file COPYING or http://www.gnu.org/licenses/old-licenses/gpl-2.0.txt
  11 */
  12
  13 #include "irq.h"
  14 #include "hollywood.h"
  15 #include "ipc.h"
  16 #include "bootmii_ppc.h"
  17 //debug only
  18 #include "printf.h"
  19
  20 void irq_initialize(void)
  21 {
  22         // enable hollywood-pic for ppc
  23         write32(HW_PPCIRQMASK, 0);
  24         write32(HW_PPCIRQFLAG, 0xffffffff);
  25
  26         // enable RESET and PIC (#14) interrupts on processor interface
  27         write32(BW_PI_IRQMASK, 0);
  28         write32(BW_PI_IRQFLAG, 0xffffffff);
  29
  30         //??? -- needed?!
  31         /*
  32         write32(HW_PPCIRQMASK+0x04, 0);
  33         write32(HW_PPCIRQMASK+0x20, 0);
  34         */
  35
  36         _CPU_ISR_Enable()
  37 }
  38
  39 void irq_shutdown(void)
  40 {
  41         write32(HW_PPCIRQMASK, 0);
  42         write32(HW_PPCIRQFLAG, 0xffffffff);
  43         (void) irq_kill();
  44 }
  45
  46 void irq_handler(void)
  47 {
  48         u32 enabled = read32(BW_PI_IRQMASK);
  49         u32 flags = read32(BW_PI_IRQFLAG);
  50         printf("flags1: 0x%08X\n", flags);
  51
  52         flags = flags & enabled;
  53
  54         if (flags & (1<<1)) { //RESET
  55                 write32(BW_PI_IRQFLAG, 1<<BW_PI_IRQ_RESET);
  56                 printf("IRQ RESET\n");
  57         }
  58         if (flags & (1<<14)) { //HW-PIC IRQ
  59                 u32 hw_enabled = read32(HW_PPCIRQMASK);
  60                 u32 hw_flags = read32(HW_PPCIRQFLAG);
  61
  62                 printf("In IRQ handler: 0x%08x 0x%08x 0x%08x\n", hw_enabled, hw_flags, hw_flags & hw_enabled);
  63
  64                 hw_flags = hw_flags & hw_enabled;
  65
  66                 if(hw_flags & IRQF_TIMER) {
  67                         // done by mini already?
  68                         /*
  69                            if (_alarm_frequency) {
  70                         // currently we use the alarm timer only for lame usbgecko polling
  71                         gecko_timer();
  72                         write32(HW_ALARM, read32(HW_TIMER) + _alarm_frequency);
  73                         }
  74                         */
  75                         write32(HW_PPCIRQFLAG, IRQF_TIMER);
  76                 }
  77                 if(hw_flags & IRQF_NAND) {
  78                         //              printf("IRQ: NAND\n");
  79                         // hmmm... should be done by mini?
  80                         write32(NAND_CMD, 0x7fffffff); // shut it up
  81                         write32(HW_PPCIRQFLAG, IRQF_NAND);
  82                         //nand_irq();
  83                 }
  84                 if(hw_flags & IRQF_GPIO1B) {
  85                         //              printf("IRQ: GPIO1B\n");
  86                         // hmmm... should be done by mini?
  87                         write32(HW_GPIO1BINTFLAG, 0xFFFFFF); // shut it up
  88                         write32(HW_PPCIRQFLAG, IRQF_GPIO1B);
  89                 }
  90                 if(hw_flags & IRQF_GPIO1) {
  91                         //              printf("IRQ: GPIO1\n");
  92                         // hmmm... should be done by mini?
  93                         write32(HW_GPIO1INTFLAG, 0xFFFFFF); // shut it up
  94                         write32(HW_PPCIRQFLAG, IRQF_GPIO1);
  95                 }
  96                 if(hw_flags & IRQF_RESET) {
  97                         //              printf("IRQ: RESET\n");
  98                         write32(HW_PPCIRQFLAG, IRQF_RESET);
  99                 }
 100                 if(hw_flags & IRQF_IPC) {
 101                         //printf("IRQ: IPC\n");
 102                         //not necessary here?
 103                         //ipc_irq();
 104                         write32(HW_PPCIRQFLAG, IRQF_IPC);
 105                 }
 106                 if(hw_flags & IRQF_AES) {
 107                         //              printf("IRQ: AES\n");
 108                         write32(HW_PPCIRQFLAG, IRQF_AES);
 109                 }
 110                 if (hw_flags & IRQF_SDHC) {
 111                         //              printf("IRQ: SDHC\n");
 112                         write32(HW_PPCIRQFLAG, IRQF_SDHC);
 113                         //sdhc_irq();
 114                 }
 115                 if (hw_flags & IRQF_OHCI0) {
 116                         printf("IRQ: OHCI0\n");
 117                         write32(HW_PPCIRQFLAG, IRQF_OHCI0);
 118                         //TODO: ohci0_irq();
 119                 }
 120                 if (hw_flags & IRQF_OHCI1) {
 121                         printf("IRQ: OHCI1\n");
 122                         write32(HW_PPCIRQFLAG, IRQF_OHCI1);
 123                         //TODO: ohci1_irq();
 124                 }
 125
 126                 hw_flags &= ~IRQF_ALL;
 127                 if(hw_flags) {
 128                         printf("IRQ: unknown 0x%08x\n", hw_flags);
 129                         write32(HW_PPCIRQFLAG, hw_flags);
 130                 }
 131                 write32(BW_PI_IRQFLAG, 1<<BW_PI_IRQ_HW);
 132                 u32 flags2 = read32(BW_PI_IRQFLAG);
 133                 printf("flags2: 0x%08X\n", flags2);
 134         }
 135
 136 //      flags &=
 137 }
 138
 139 void irq_bw_enable(u32 irq)
 140 {
 141         set32(BW_PI_IRQMASK, 1<<irq);
 142 }
 143
 144 void irq_bw_disable(u32 irq) {
 145         clear32(BW_PI_IRQMASK, 1<<irq);
 146 }
 147
 148 void irq_hw_enable(u32 irq)
 149 {
 150         set32(HW_PPCIRQMASK, 1<<irq);
 151 }
 152
 153 void irq_hw_disable(u32 irq)
 154 {
 155         clear32(HW_PPCIRQMASK, 1<<irq);
 156 }
 157
 158 u32 irq_kill() {
 159         u32 cookie;
 160         _CPU_ISR_Disable(cookie);
 161         return cookie;
 162 }
 163
 164 void irq_restore(u32 cookie) {
 165         _CPU_ISR_Restore(cookie);
 166 }
 167