[MIPS] IP32: Enable PCI bridges
[linux-2.6.git] / arch / mips / jazz / irq.c
index b309b1bcf2e87926117e1de16ea2b835107b96c2..015cf4bb51ddb4ab3fd92928e460df07d9509aff 100644 (file)
@@ -15,8 +15,6 @@
 #include <asm/io.h>
 #include <asm/jazz.h>
 
-extern asmlinkage void jazz_handle_int(void);
-
 static DEFINE_SPINLOCK(r4030_lock);
 
 static void enable_r4030_irq(unsigned int irq)
@@ -30,14 +28,6 @@ static void enable_r4030_irq(unsigned int irq)
        spin_unlock_irqrestore(&r4030_lock, flags);
 }
 
-static unsigned int startup_r4030_irq(unsigned int irq)
-{
-       enable_r4030_irq(irq);
-       return 0; /* never anything pending */
-}
-
-#define shutdown_r4030_irq     disable_r4030_irq
-
 void disable_r4030_irq(unsigned int irq)
 {
        unsigned int mask = ~(1 << (irq - JAZZ_PARALLEL_IRQ));
@@ -49,34 +39,20 @@ void disable_r4030_irq(unsigned int irq)
        spin_unlock_irqrestore(&r4030_lock, flags);
 }
 
-#define mask_and_ack_r4030_irq disable_r4030_irq
-
-static void end_r4030_irq(unsigned int irq)
-{
-       if (!(irq_desc[irq].status & (IRQ_DISABLED|IRQ_INPROGRESS)))
-               enable_r4030_irq(irq);
-}
-
-static struct hw_interrupt_type r4030_irq_type = {
-       .typename = "R4030",
-       .startup = startup_r4030_irq,
-       .shutdown = shutdown_r4030_irq,
-       .enable = enable_r4030_irq,
-       .disable = disable_r4030_irq,
-       .ack = mask_and_ack_r4030_irq,
-       .end = end_r4030_irq,
+static struct irq_chip r4030_irq_type = {
+       .name = "R4030",
+       .ack = disable_r4030_irq,
+       .mask = disable_r4030_irq,
+       .mask_ack = disable_r4030_irq,
+       .unmask = enable_r4030_irq,
 };
 
 void __init init_r4030_ints(void)
 {
        int i;
 
-       for (i = JAZZ_PARALLEL_IRQ; i <= JAZZ_TIMER_IRQ; i++) {
-               irq_desc[i].status     = IRQ_DISABLED;
-               irq_desc[i].action     = 0;
-               irq_desc[i].depth      = 1;
-               irq_desc[i].handler    = &r4030_irq_type;
-       }
+       for (i = JAZZ_PARALLEL_IRQ; i <= JAZZ_TIMER_IRQ; i++)
+               set_irq_chip_and_handler(i, &r4030_irq_type, handle_level_irq);
 
        r4030_write_reg16(JAZZ_IO_IRQ_ENABLE, 0);
        r4030_read_reg16(JAZZ_IO_IRQ_SOURCE);           /* clear pending IRQs */
@@ -90,10 +66,82 @@ void __init init_r4030_ints(void)
  */
 void __init arch_init_irq(void)
 {
-       set_except_vector(0, jazz_handle_int);
-
        init_i8259_irqs();                      /* Integrated i8259  */
        init_r4030_ints();
 
        change_c0_status(ST0_IM, IE_IRQ4 | IE_IRQ3 | IE_IRQ2 | IE_IRQ1);
 }
+
+static void loc_call(unsigned int irq, unsigned int mask)
+{
+       r4030_write_reg16(JAZZ_IO_IRQ_ENABLE,
+                         r4030_read_reg16(JAZZ_IO_IRQ_ENABLE) & mask);
+       do_IRQ(irq);
+       r4030_write_reg16(JAZZ_IO_IRQ_ENABLE,
+                         r4030_read_reg16(JAZZ_IO_IRQ_ENABLE) | mask);
+}
+
+static void ll_local_dev(void)
+{
+       switch (r4030_read_reg32(JAZZ_IO_IRQ_SOURCE)) {
+       case 0:
+               panic("Unimplemented loc_no_irq handler");
+               break;
+       case 4:
+               loc_call(JAZZ_PARALLEL_IRQ, JAZZ_IE_PARALLEL);
+               break;
+       case 8:
+               loc_call(JAZZ_PARALLEL_IRQ, JAZZ_IE_FLOPPY);
+               break;
+       case 12:
+               panic("Unimplemented loc_sound handler");
+               break;
+       case 16:
+               panic("Unimplemented loc_video handler");
+               break;
+       case 20:
+               loc_call(JAZZ_ETHERNET_IRQ, JAZZ_IE_ETHERNET);
+               break;
+       case 24:
+               loc_call(JAZZ_SCSI_IRQ, JAZZ_IE_SCSI);
+               break;
+       case 28:
+               loc_call(JAZZ_KEYBOARD_IRQ, JAZZ_IE_KEYBOARD);
+               break;
+       case 32:
+               loc_call(JAZZ_MOUSE_IRQ, JAZZ_IE_MOUSE);
+               break;
+       case 36:
+               loc_call(JAZZ_SERIAL1_IRQ, JAZZ_IE_SERIAL1);
+               break;
+       case 40:
+               loc_call(JAZZ_SERIAL2_IRQ, JAZZ_IE_SERIAL2);
+               break;
+       }
+}
+
+asmlinkage void plat_irq_dispatch(void)
+{
+       unsigned int pending = read_c0_cause() & read_c0_status();
+
+       if (pending & IE_IRQ5)
+               write_c0_compare(0);
+       else if (pending & IE_IRQ4) {
+               r4030_read_reg32(JAZZ_TIMER_REGISTER);
+               do_IRQ(JAZZ_TIMER_IRQ);
+       } else if (pending & IE_IRQ3)
+               panic("Unimplemented ISA NMI handler");
+       else if (pending & IE_IRQ2)
+               do_IRQ(r4030_read_reg32(JAZZ_EISA_IRQ_ACK));
+       else if (pending & IE_IRQ1) {
+               ll_local_dev();
+       } else if (unlikely(pending & IE_IRQ0))
+               panic("Unimplemented local_dma handler");
+       else if (pending & IE_SW1) {
+               clear_c0_cause(IE_SW1);
+               panic("Unimplemented sw1 handler");
+       } else if (pending & IE_SW0) {
+               clear_c0_cause(IE_SW0);
+               panic("Unimplemented sw0 handler");
+       }
+}