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macio.h

#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__ */

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