[PATCH] powerpc: fix trigger handling in the new irq code
[linux-2.6.git] / arch / powerpc / kernel / pci_32.c
index 8474355..09b1e1b 100644 (file)
@@ -2,7 +2,6 @@
  * Common pmac/prep/chrp pci routines. -- Cort
  */
 
-#include <linux/config.h>
 #include <linux/kernel.h>
 #include <linux/pci.h>
 #include <linux/delay.h>
@@ -12,6 +11,7 @@
 #include <linux/sched.h>
 #include <linux/errno.h>
 #include <linux/bootmem.h>
+#include <linux/irq.h>
 
 #include <asm/processor.h>
 #include <asm/io.h>
@@ -19,7 +19,6 @@
 #include <asm/sections.h>
 #include <asm/pci-bridge.h>
 #include <asm/byteorder.h>
-#include <asm/irq.h>
 #include <asm/uaccess.h>
 #include <asm/machdep.h>
 
@@ -1405,6 +1404,65 @@ pcibios_update_irq(struct pci_dev *dev, int irq)
        /* XXX FIXME - update OF device tree node interrupt property */
 }
 
+#ifdef CONFIG_PPC_MERGE
+/* XXX This is a copy of the ppc64 version. This is temporary until we start
+ * merging the 2 PCI layers
+ */
+/*
+ * Reads the interrupt pin to determine if interrupt is use by card.
+ * If the interrupt is used, then gets the interrupt line from the
+ * openfirmware and sets it in the pci_dev and pci_config line.
+ */
+int pci_read_irq_line(struct pci_dev *pci_dev)
+{
+       struct of_irq oirq;
+       unsigned int virq;
+
+       DBG("Try to map irq for %s...\n", pci_name(pci_dev));
+
+       /* Try to get a mapping from the device-tree */
+       if (of_irq_map_pci(pci_dev, &oirq)) {
+               u8 line, pin;
+
+               /* If that fails, lets fallback to what is in the config
+                * space and map that through the default controller. We
+                * also set the type to level low since that's what PCI
+                * interrupts are. If your platform does differently, then
+                * either provide a proper interrupt tree or don't use this
+                * function.
+                */
+               if (pci_read_config_byte(pci_dev, PCI_INTERRUPT_PIN, &pin))
+                       return -1;
+               if (pin == 0)
+                       return -1;
+               if (pci_read_config_byte(pci_dev, PCI_INTERRUPT_LINE, &line) ||
+                   line == 0xff) {
+                       return -1;
+               }
+               DBG(" -> no map ! Using irq line %d from PCI config\n", line);
+
+               virq = irq_create_mapping(NULL, line);
+               if (virq != NO_IRQ)
+                       set_irq_type(virq, IRQ_TYPE_LEVEL_LOW);
+       } else {
+               DBG(" -> got one, spec %d cells (0x%08x...) on %s\n",
+                   oirq.size, oirq.specifier[0], oirq.controller->full_name);
+
+               virq = irq_create_of_mapping(oirq.controller, oirq.specifier,
+                                            oirq.size);
+       }
+       if(virq == NO_IRQ) {
+               DBG(" -> failed to map !\n");
+               return -1;
+       }
+       pci_dev->irq = virq;
+       pci_write_config_byte(pci_dev, PCI_INTERRUPT_LINE, virq);
+
+       return 0;
+}
+EXPORT_SYMBOL(pci_read_irq_line);
+#endif /* CONFIG_PPC_MERGE */
+
 int pcibios_enable_device(struct pci_dev *dev, int mask)
 {
        u16 cmd, old_cmd;