1 files changed, 13 insertions, 67 deletions

diff --git a/arch/powerpc/platforms/powermac/pic.c b/arch/powerpc/platforms/powermac/pic.c
index 901bfbddc3dd..7761aabfc293 100644
--- a/arch/powerpc/platforms/powermac/pic.c
+++ b/arch/powerpc/platforms/powermac/pic.c
@@ -52,13 +52,8 @@ struct device_node *of_irq_dflt_pic;
 /* Default addresses */
 static volatile struct pmac_irq_hw __iomem *pmac_irq_hw[4];
 
-#define GC_LEVEL_MASK           0x3ff00000
-#define OHARE_LEVEL_MASK        0x1ff00000
-#define HEATHROW_LEVEL_MASK     0x1ff00000
-
 static int max_irqs;
 static int max_real_irqs;
-static u32 level_mask[4];
 
 static DEFINE_RAW_SPINLOCK(pmac_pic_lock);
 
@@ -217,8 +212,7 @@ static irqreturn_t gatwick_action(int cpl, void *dev_id)
         for (irq = max_irqs; (irq -= 32) >= max_real_irqs; ) {
                 int i = irq >> 5;
                 bits = in_le32(&pmac_irq_hw[i]->event) | ppc_lost_interrupts[i];
-                /* We must read level interrupts from the level register */
-                bits |= (in_le32(&pmac_irq_hw[i]->level) & level_mask[i]);
+                bits |= in_le32(&pmac_irq_hw[i]->level);
                 bits &= ppc_cached_irq_mask[i];
                 if (bits == 0)
                         continue;
@@ -248,8 +242,7 @@ static unsigned int pmac_pic_get_irq(void)
         for (irq = max_real_irqs; (irq -= 32) >= 0; ) {
                 int i = irq >> 5;
                 bits = in_le32(&pmac_irq_hw[i]->event) | ppc_lost_interrupts[i];
-                /* We must read level interrupts from the level register */
-                bits |= (in_le32(&pmac_irq_hw[i]->level) & level_mask[i]);
+                bits |= in_le32(&pmac_irq_hw[i]->level);
                 bits &= ppc_cached_irq_mask[i];
                 if (bits == 0)
                         continue;
@@ -284,19 +277,14 @@ static int pmac_pic_host_match(struct irq_host *h, struct device_node *node)
 static int pmac_pic_host_map(struct irq_host *h, unsigned int virq,
                              irq_hw_number_t hw)
 {
-        int level;
-
         if (hw >= max_irqs)
                 return -EINVAL;
 
         /* Mark level interrupts, set delayed disable for edge ones and set
          * handlers
          */
-        level = !!(level_mask[hw >> 5] & (1UL << (hw & 0x1f)));
-        if (level)
-                irq_set_status_flags(virq, IRQ_LEVEL);
-        irq_set_chip_and_handler(virq, &pmac_pic,
-                                 level ? handle_level_irq : handle_edge_irq);
+        irq_set_status_flags(virq, IRQ_LEVEL);
+        irq_set_chip_and_handler(virq, &pmac_pic, handle_level_irq);
         return 0;
 }
 
@@ -334,21 +322,14 @@ static void __init pmac_pic_probe_oldstyle(void)
 
         if ((master = of_find_node_by_name(NULL, "gc")) != NULL) {
                 max_irqs = max_real_irqs = 32;
-                level_mask[0] = GC_LEVEL_MASK;
         } else if ((master = of_find_node_by_name(NULL, "ohare")) != NULL) {
                 max_irqs = max_real_irqs = 32;
-                level_mask[0] = OHARE_LEVEL_MASK;
-
                 /* We might have a second cascaded ohare */
                 slave = of_find_node_by_name(NULL, "pci106b,7");
-                if (slave) {
+                if (slave)
                         max_irqs = 64;
-                        level_mask[1] = OHARE_LEVEL_MASK;
-                }
         } else if ((master = of_find_node_by_name(NULL, "mac-io")) != NULL) {
                 max_irqs = max_real_irqs = 64;
-                level_mask[0] = HEATHROW_LEVEL_MASK;
-                level_mask[1] = 0;
 
                 /* We might have a second cascaded heathrow */
                 slave = of_find_node_by_name(master, "mac-io");
@@ -363,11 +344,8 @@ static void __init pmac_pic_probe_oldstyle(void)
                 }
 
                 /* We found a slave */
-                if (slave) {
+                if (slave)
                         max_irqs = 128;
-                        level_mask[2] = HEATHROW_LEVEL_MASK;
-                        level_mask[3] = 0;
-                }
         }
         BUG_ON(master == NULL);
 
@@ -464,18 +442,6 @@ int of_irq_map_oldworld(struct device_node *device, int index,
 }
 #endif /* CONFIG_PPC32 */
 
-static void pmac_u3_cascade(unsigned int irq, struct irq_desc *desc)
-{
-        struct irq_chip *chip = irq_desc_get_chip(desc);
-        struct mpic *mpic = irq_desc_get_handler_data(desc);
-        unsigned int cascade_irq = mpic_get_one_irq(mpic);
-
-        if (cascade_irq != NO_IRQ)
-                generic_handle_irq(cascade_irq);
-
-        chip->irq_eoi(&desc->irq_data);
-}
-
 static void __init pmac_pic_setup_mpic_nmi(struct mpic *mpic)
 {
 #if defined(CONFIG_XMON) && defined(CONFIG_PPC32)
@@ -498,14 +464,8 @@ static struct mpic * __init pmac_setup_one_mpic(struct device_node *np,
                                                 int master)
 {
         const char *name = master ? " MPIC 1   " : " MPIC 2   ";
-        struct resource r;
         struct mpic *mpic;
-        unsigned int flags = master ? MPIC_PRIMARY : 0;
-        int rc;
-
-        rc = of_address_to_resource(np, 0, &r);
-        if (rc)
-                return NULL;
+        unsigned int flags = master ? 0 : MPIC_SECONDARY;
 
         pmac_call_feature(PMAC_FTR_ENABLE_MPIC, np, 0, 0);
 
@@ -519,7 +479,7 @@ static struct mpic * __init pmac_setup_one_mpic(struct device_node *np,
         if (master && (flags & MPIC_BIG_ENDIAN))
                 flags |= MPIC_U3_HT_IRQS;
 
-        mpic = mpic_alloc(np, r.start, flags, 0, 0, name);
+        mpic = mpic_alloc(np, 0, flags, 0, 0, name);
         if (mpic == NULL)
                 return NULL;
 
@@ -532,7 +492,6 @@ static int __init pmac_pic_probe_mpic(void)
 {
         struct mpic *mpic1, *mpic2;
         struct device_node *np, *master = NULL, *slave = NULL;
-        unsigned int cascade;
 
         /* We can have up to 2 MPICs cascaded */
         for (np = NULL; (np = of_find_node_by_type(np, "open-pic"))
@@ -568,27 +527,14 @@ static int __init pmac_pic_probe_mpic(void)
 
         of_node_put(master);
 
-        /* No slave, let's go out */
-        if (slave == NULL)
-                return 0;
-
-        /* Get/Map slave interrupt */
-        cascade = irq_of_parse_and_map(slave, 0);
-        if (cascade == NO_IRQ) {
-                printk(KERN_ERR "Failed to map cascade IRQ\n");
-                return 0;
-        }
-
-        mpic2 = pmac_setup_one_mpic(slave, 0);
-        if (mpic2 == NULL) {
-                printk(KERN_ERR "Failed to setup slave MPIC\n");
+        /* Set up a cascaded controller, if present */
+        if (slave) {
+                mpic2 = pmac_setup_one_mpic(slave, 0);
+                if (mpic2 == NULL)
+                        printk(KERN_ERR "Failed to setup slave MPIC\n");
                 of_node_put(slave);
-                return 0;
         }
-        irq_set_handler_data(cascade, mpic2);
-        irq_set_chained_handler(cascade, pmac_u3_cascade);
 
-        of_node_put(slave);
         return 0;
 }