1 files changed, 142 insertions, 0 deletions

diff --git a/arch/powerpc/include/asm/macio.h b/arch/powerpc/include/asm/macio.h
new file mode 100644
index 000000000000..079c06eae446
--- /dev/null
+++ b/arch/powerpc/include/asm/macio.h
@@ -0,0 +1,142 @@
+#ifndef __MACIO_ASIC_H__
+#define __MACIO_ASIC_H__
+#ifdef __KERNEL__
+
+#include <linux/of_device.h>
+
+extern struct bus_type macio_bus_type;
+
+/* MacIO device driver is defined later */
+struct macio_driver;
+struct macio_chip;
+
+#define MACIO_DEV_COUNT_RESOURCES       8
+#define MACIO_DEV_COUNT_IRQS            8
+
+/*
+ * the macio_bus structure is used to describe a "virtual" bus
+ * within a MacIO ASIC. It's typically provided by a macio_pci_asic
+ * PCI device, but could be provided differently as well (nubus
+ * machines using a fake OF tree).
+ *
+ * The pdev field can be NULL on non-PCI machines
+ */
+struct macio_bus
+{
+        struct macio_chip       *chip;          /* macio_chip (private use) */
+        int                     index;          /* macio chip index in system */
+#ifdef CONFIG_PCI
+        struct pci_dev          *pdev;          /* PCI device hosting this bus */
+#endif
+};
+
+/*
+ * the macio_dev structure is used to describe a device
+ * within an Apple MacIO ASIC.
+ */
+struct macio_dev
+{
+        struct macio_bus        *bus;           /* macio bus this device is on */
+        struct macio_dev        *media_bay;     /* Device is part of a media bay */
+        struct of_device        ofdev;
+        int                     n_resources;
+        struct resource         resource[MACIO_DEV_COUNT_RESOURCES];
+        int                     n_interrupts;
+        struct resource         interrupt[MACIO_DEV_COUNT_IRQS];
+};
+#define to_macio_device(d) container_of(d, struct macio_dev, ofdev.dev)
+#define of_to_macio_device(d) container_of(d, struct macio_dev, ofdev)
+
+extern struct macio_dev *macio_dev_get(struct macio_dev *dev);
+extern void macio_dev_put(struct macio_dev *dev);
+
+/*
+ * Accessors to resources & interrupts and other device
+ * fields
+ */
+
+static inline int macio_resource_count(struct macio_dev *dev)
+{
+        return dev->n_resources;
+}
+
+static inline unsigned long macio_resource_start(struct macio_dev *dev, int resource_no)
+{
+        return dev->resource[resource_no].start;
+}
+
+static inline unsigned long macio_resource_end(struct macio_dev *dev, int resource_no)
+{
+        return dev->resource[resource_no].end;
+}
+
+static inline unsigned long macio_resource_len(struct macio_dev *dev, int resource_no)
+{
+        struct resource *res = &dev->resource[resource_no];
+        if (res->start == 0 || res->end == 0 || res->end < res->start)
+                return 0;
+        return res->end - res->start + 1;
+}
+
+extern int macio_request_resource(struct macio_dev *dev, int resource_no, const char *name);
+extern void macio_release_resource(struct macio_dev *dev, int resource_no);
+extern int macio_request_resources(struct macio_dev *dev, const char *name);
+extern void macio_release_resources(struct macio_dev *dev);
+
+static inline int macio_irq_count(struct macio_dev *dev)
+{
+        return dev->n_interrupts;
+}
+
+static inline int macio_irq(struct macio_dev *dev, int irq_no)
+{
+        return dev->interrupt[irq_no].start;
+}
+
+static inline void macio_set_drvdata(struct macio_dev *dev, void *data)
+{
+        dev_set_drvdata(&dev->ofdev.dev, data);
+}
+
+static inline void* macio_get_drvdata(struct macio_dev *dev)
+{
+        return dev_get_drvdata(&dev->ofdev.dev);
+}
+
+static inline struct device_node *macio_get_of_node(struct macio_dev *mdev)
+{
+        return mdev->ofdev.node;
+}
+
+#ifdef CONFIG_PCI
+static inline struct pci_dev *macio_get_pci_dev(struct macio_dev *mdev)
+{
+        return mdev->bus->pdev;
+}
+#endif
+
+/*
+ * A driver for a mac-io chip based device
+ */
+struct macio_driver
+{
+        char                    *name;
+        struct of_device_id     *match_table;
+        struct module           *owner;
+
+        int     (*probe)(struct macio_dev* dev, const struct of_device_id *match);
+        int     (*remove)(struct macio_dev* dev);
+
+        int     (*suspend)(struct macio_dev* dev, pm_message_t state);
+        int     (*resume)(struct macio_dev* dev);
+        int     (*shutdown)(struct macio_dev* dev);
+
+        struct device_driver    driver;
+};
+#define to_macio_driver(drv) container_of(drv,struct macio_driver, driver)
+
+extern int macio_register_driver(struct macio_driver *);
+extern void macio_unregister_driver(struct macio_driver *);
+
+#endif /* __KERNEL__ */
+#endif /* __MACIO_ASIC_H__ */