first commit

1 files changed, 93 insertions, 0 deletions

diff --git a/include/linux/of_irq.h b/include/linux/of_irq.h
new file mode 100644
index 000000000..535cecf1e
--- /dev/null
+++ b/include/linux/of_irq.h
@@ -0,0 +1,93 @@
+#ifndef __OF_IRQ_H
+#define __OF_IRQ_H
+
+#if defined(CONFIG_OF)
+struct of_irq;
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <linux/irq.h>
+#include <linux/irqdomain.h>
+#include <linux/ioport.h>
+#include <linux/of.h>
+
+/*
+ * irq_of_parse_and_map() is used by all OF enabled platforms; but SPARC
+ * implements it differently.  However, the prototype is the same for all,
+ * so declare it here regardless of the CONFIG_OF_IRQ setting.
+ */
+extern unsigned int irq_of_parse_and_map(struct device_node *node, int index);
+
+#if defined(CONFIG_OF_IRQ)
+/**
+ * of_irq - container for device_node/irq_specifier pair for an irq controller
+ * @controller: pointer to interrupt controller device tree node
+ * @size: size of interrupt specifier
+ * @specifier: array of cells @size long specifing the specific interrupt
+ *
+ * This structure is returned when an interrupt is mapped. The controller
+ * field needs to be put() after use
+ */
+#define OF_MAX_IRQ_SPEC		4 /* We handle specifiers of at most 4 cells */
+struct of_irq {
+	struct device_node *controller; /* Interrupt controller node */
+	u32 size; /* Specifier size */
+	u32 specifier[OF_MAX_IRQ_SPEC]; /* Specifier copy */
+};
+
+typedef int (*of_irq_init_cb_t)(struct device_node *, struct device_node *);
+
+/*
+ * Workarounds only applied to 32bit powermac machines
+ */
+#define OF_IMAP_OLDWORLD_MAC	0x00000001
+#define OF_IMAP_NO_PHANDLE	0x00000002
+
+#if defined(CONFIG_PPC32) && defined(CONFIG_PPC_PMAC)
+extern unsigned int of_irq_workarounds;
+extern struct device_node *of_irq_dflt_pic;
+extern int of_irq_map_oldworld(struct device_node *device, int index,
+			       struct of_irq *out_irq);
+#else /* CONFIG_PPC32 && CONFIG_PPC_PMAC */
+#define of_irq_workarounds (0)
+#define of_irq_dflt_pic (NULL)
+static inline int of_irq_map_oldworld(struct device_node *device, int index,
+				      struct of_irq *out_irq)
+{
+	return -EINVAL;
+}
+#endif /* CONFIG_PPC32 && CONFIG_PPC_PMAC */
+
+
+extern int of_irq_map_raw(struct device_node *parent, const __be32 *intspec,
+			  u32 ointsize, const __be32 *addr,
+			  struct of_irq *out_irq);
+extern int of_irq_map_one(struct device_node *device, int index,
+			  struct of_irq *out_irq);
+extern unsigned int irq_create_of_mapping(struct device_node *controller,
+					  const u32 *intspec,
+					  unsigned int intsize);
+extern int of_irq_to_resource(struct device_node *dev, int index,
+			      struct resource *r);
+extern int of_irq_count(struct device_node *dev);
+extern int of_irq_to_resource_table(struct device_node *dev,
+		struct resource *res, int nr_irqs);
+extern struct device_node *of_irq_find_parent(struct device_node *child);
+
+extern void of_irq_init(const struct of_device_id *matches);
+
+#endif /* CONFIG_OF_IRQ */
+
+#else /* !CONFIG_OF */
+static inline unsigned int irq_of_parse_and_map(struct device_node *dev,
+						int index)
+{
+	return 0;
+}
+
+static inline void *of_irq_find_parent(struct device_node *child)
+{
+	return NULL;
+}
+#endif /* !CONFIG_OF */
+
+#endif /* __OF_IRQ_H */