sparc32: introduce build_device_irq

[pandora-kernel.git] / arch / sparc / kernel / sun4d_irq.c

diff --git a/arch/sparc/kernel/sun4d_irq.c b/arch/sparc/kernel/sun4d_irq.c
index fc1c22f..77b4a89 100644 (file)
--- a/arch/sparc/kernel/sun4d_irq.c
+++ b/arch/sparc/kernel/sun4d_irq.c
@@ -440,6 +440,56 @@ static void __init sun4d_load_profile_irqs(void)
        }
 }
 
+unsigned int sun4d_build_device_irq(struct platform_device *op,
+                                    unsigned int real_irq)
+{
+       static int pil_to_sbus[] = {
+               0, 0, 1, 2, 0, 3, 0, 4, 0, 5, 0, 6, 0, 7, 0, 0,
+       };
+       struct device_node *dp = op->dev.of_node;
+       struct device_node *io_unit, *sbi = dp->parent;
+       const struct linux_prom_registers *regs;
+       int board, slot;
+       int sbusl;
+
+       while (sbi) {
+               if (!strcmp(sbi->name, "sbi"))
+                       break;
+
+               sbi = sbi->parent;
+       }
+       if (!sbi)
+               goto err_out;
+
+       regs = of_get_property(dp, "reg", NULL);
+       if (!regs)
+               goto err_out;
+
+       slot = regs->which_io;
+
+       /*
+        *  If SBI's parent is not io-unit or the io-unit lacks
+        * a "board#" property, something is very wrong.
+        */
+       if (!sbi->parent || strcmp(sbi->parent->name, "io-unit")) {
+               printk("%s: Error, parent is not io-unit.\n", sbi->full_name);
+               goto err_out;
+       }
+       io_unit = sbi->parent;
+       board = of_getintprop_default(io_unit, "board#", -1);
+       if (board == -1) {
+               printk("%s: Error, lacks board# property.\n", io_unit->full_name);
+               goto err_out;
+       }
+
+       sbusl = pil_to_sbus[real_irq];
+       if (sbusl)
+               return (((board + 1) << 5) + (sbusl << 2) + slot);
+
+err_out:
+       return real_irq;
+}
+
 static void __init sun4d_fixup_trap_table(void)
 {
 #ifdef CONFIG_SMP
@@ -559,6 +609,7 @@ void __init sun4d_init_IRQ(void)
        BTFIXUPSET_CALL(load_profile_irq, sun4d_load_profile_irq, BTFIXUPCALL_NORM);
 
        sparc_irq_config.init_timers = sun4d_init_timers;
+       sparc_irq_config.build_device_irq = sun4d_build_device_irq;
 
 #ifdef CONFIG_SMP
        BTFIXUPSET_CALL(set_cpu_int, sun4d_set_cpu_int, BTFIXUPCALL_NORM);