1 files changed, 90 insertions, 3 deletions

diff --git a/arch/sh/kernel/cpu/irq/intc.c b/arch/sh/kernel/cpu/irq/intc.c
index 84806b2027f8..da5dae787888 100644
--- a/arch/sh/kernel/cpu/irq/intc.c
+++ b/arch/sh/kernel/cpu/irq/intc.c
@@ -1,7 +1,7 @@
 /*
  * Shared interrupt handling code for IPR and INTC2 types of IRQs.
  *
- * Copyright (C) 2007 Magnus Damm
+ * Copyright (C) 2007, 2008 Magnus Damm
  *
  * Based on intc2.c and ipr.c
  *
@@ -62,6 +62,9 @@ struct intc_desc_int {
 #endif
 
 static unsigned int intc_prio_level[NR_IRQS]; /* for now */
+#ifdef CONFIG_CPU_SH3
+static unsigned long ack_handle[NR_IRQS];
+#endif
 
 static inline struct intc_desc_int *get_intc_desc(unsigned int irq)
 {
@@ -98,17 +101,26 @@ static void write_32(unsigned long addr, unsigned long h, unsigned long data)
 
 static void modify_8(unsigned long addr, unsigned long h, unsigned long data)
 {
+        unsigned long flags;
+        local_irq_save(flags);
         ctrl_outb(set_field(ctrl_inb(addr), data, h), addr);
+        local_irq_restore(flags);
 }
 
 static void modify_16(unsigned long addr, unsigned long h, unsigned long data)
 {
+        unsigned long flags;
+        local_irq_save(flags);
         ctrl_outw(set_field(ctrl_inw(addr), data, h), addr);
+        local_irq_restore(flags);
 }
 
 static void modify_32(unsigned long addr, unsigned long h, unsigned long data)
 {
+        unsigned long flags;
+        local_irq_save(flags);
         ctrl_outl(set_field(ctrl_inl(addr), data, h), addr);
+        local_irq_restore(flags);
 }
 
 enum {  REG_FN_ERR = 0, REG_FN_WRITE_BASE = 1, REG_FN_MODIFY_BASE = 5 };
@@ -219,6 +231,25 @@ static void intc_disable(unsigned int irq)
         }
 }
 
+#ifdef CONFIG_CPU_SH3
+static void intc_mask_ack(unsigned int irq)
+{
+        struct intc_desc_int *d = get_intc_desc(irq);
+        unsigned long handle = ack_handle[irq];
+        unsigned long addr;
+
+        intc_disable(irq);
+
+        /* read register and write zero only to the assocaited bit */
+
+        if (handle) {
+                addr = INTC_REG(d, _INTC_ADDR_D(handle), 0);
+                ctrl_inb(addr);
+                ctrl_outb(0x3f ^ set_field(0, 1, handle), addr);
+        }
+}
+#endif
+
 static struct intc_handle_int *intc_find_irq(struct intc_handle_int *hp,
                                              unsigned int nr_hp,
                                              unsigned int irq)
@@ -280,7 +311,12 @@ static unsigned char intc_irq_sense_table[IRQ_TYPE_SENSE_MASK + 1] = {
         [IRQ_TYPE_EDGE_FALLING] = VALID(0),
         [IRQ_TYPE_EDGE_RISING] = VALID(1),
         [IRQ_TYPE_LEVEL_LOW] = VALID(2),
+        /* SH7706, SH7707 and SH7709 do not support high level triggered */
+#if !defined(CONFIG_CPU_SUBTYPE_SH7706) && \
+    !defined(CONFIG_CPU_SUBTYPE_SH7707) && \
+    !defined(CONFIG_CPU_SUBTYPE_SH7709)
         [IRQ_TYPE_LEVEL_HIGH] = VALID(3),
+#endif
 };
 
 static int intc_set_sense(unsigned int irq, unsigned int type)
@@ -430,6 +466,40 @@ static unsigned int __init intc_prio_data(struct intc_desc *desc,
         return 0;
 }
 
+#ifdef CONFIG_CPU_SH3
+static unsigned int __init intc_ack_data(struct intc_desc *desc,
+                                          struct intc_desc_int *d,
+                                          intc_enum enum_id)
+{
+        struct intc_mask_reg *mr = desc->ack_regs;
+        unsigned int i, j, fn, mode;
+        unsigned long reg_e, reg_d;
+
+        for (i = 0; mr && enum_id && i < desc->nr_ack_regs; i++) {
+                mr = desc->ack_regs + i;
+
+                for (j = 0; j < ARRAY_SIZE(mr->enum_ids); j++) {
+                        if (mr->enum_ids[j] != enum_id)
+                                continue;
+
+                        fn = REG_FN_MODIFY_BASE;
+                        mode = MODE_ENABLE_REG;
+                        reg_e = mr->set_reg;
+                        reg_d = mr->set_reg;
+
+                        fn += (mr->reg_width >> 3) - 1;
+                        return _INTC_MK(fn, mode,
+                                        intc_get_reg(d, reg_e),
+                                        intc_get_reg(d, reg_d),
+                                        1,
+                                        (mr->reg_width - 1) - j);
+                }
+        }
+
+        return 0;
+}
+#endif
+
 static unsigned int __init intc_sense_data(struct intc_desc *desc,
                                            struct intc_desc_int *d,
                                            intc_enum enum_id)
@@ -530,6 +600,11 @@ static void __init intc_register_irq(struct intc_desc *desc,
 
         /* irq should be disabled by default */
         d->chip.mask(irq);
+
+#ifdef CONFIG_CPU_SH3
+        if (desc->ack_regs)
+                ack_handle[irq] = intc_ack_data(desc, d, enum_id);
+#endif
 }
 
 static unsigned int __init save_reg(struct intc_desc_int *d,
@@ -560,6 +635,9 @@ void __init register_intc_controller(struct intc_desc *desc)
         d->nr_reg += desc->prio_regs ? desc->nr_prio_regs * 2 : 0;
         d->nr_reg += desc->sense_regs ? desc->nr_sense_regs : 0;
 
+#ifdef CONFIG_CPU_SH3
+        d->nr_reg += desc->ack_regs ? desc->nr_ack_regs : 0;
+#endif
         d->reg = alloc_bootmem(d->nr_reg * sizeof(*d->reg));
 #ifdef CONFIG_SMP
         d->smp = alloc_bootmem(d->nr_reg * sizeof(*d->smp));
@@ -592,14 +670,23 @@ void __init register_intc_controller(struct intc_desc *desc)
                 }
         }
 
-        BUG_ON(k > 256); /* _INTC_ADDR_E() and _INTC_ADDR_D() are 8 bits */
-
         d->chip.name = desc->name;
         d->chip.mask = intc_disable;
         d->chip.unmask = intc_enable;
         d->chip.mask_ack = intc_disable;
         d->chip.set_type = intc_set_sense;
 
+#ifdef CONFIG_CPU_SH3
+        if (desc->ack_regs) {
+                for (i = 0; i < desc->nr_ack_regs; i++)
+                        k += save_reg(d, k, desc->ack_regs[i].set_reg, 0);
+
+                d->chip.mask_ack = intc_mask_ack;
+        }
+#endif
+
+        BUG_ON(k > 256); /* _INTC_ADDR_E() and _INTC_ADDR_D() are 8 bits */
+
         for (i = 0; i < desc->nr_vectors; i++) {
                 struct intc_vect *vect = desc->vectors + i;