LXR linux/arch/powerpc/include/asm/macio.h

   1#ifndef __MACIO_ASIC_H__
   2#define __MACIO_ASIC_H__
   3#ifdef __KERNEL__
   4
   5#include <linux/of_device.h>
   6
   7extern struct bus_type macio_bus_type;
   8
   9/* MacIO device driver is defined later */
  10struct macio_driver;
  11struct macio_chip;
  12
  13#define MACIO_DEV_COUNT_RESOURCES       8
  14#define MACIO_DEV_COUNT_IRQS            8
  15
  16/*
  17 * the macio_bus structure is used to describe a "virtual" bus
  18 * within a MacIO ASIC. It's typically provided by a macio_pci_asic
  19 * PCI device, but could be provided differently as well (nubus
  20 * machines using a fake OF tree).
  21 *
  22 * The pdev field can be NULL on non-PCI machines
  23 */
  24struct macio_bus
  25{
  26        struct macio_chip       *chip;          /* macio_chip (private use) */
  27        int                     index;          /* macio chip index in system */
  28#ifdef CONFIG_PCI
  29        struct pci_dev          *pdev;          /* PCI device hosting this bus */
  30#endif
  31};
  32
  33/*
  34 * the macio_dev structure is used to describe a device
  35 * within an Apple MacIO ASIC.
  36 */
  37struct macio_dev
  38{
  39        struct macio_bus        *bus;           /* macio bus this device is on */
  40        struct macio_dev        *media_bay;     /* Device is part of a media bay */
  41        struct of_device        ofdev;
  42        int                     n_resources;
  43        struct resource         resource[MACIO_DEV_COUNT_RESOURCES];
  44        int                     n_interrupts;
  45        struct resource         interrupt[MACIO_DEV_COUNT_IRQS];
  46};
  47#define to_macio_device(d) container_of(d, struct macio_dev, ofdev.dev)
  48#define of_to_macio_device(d) container_of(d, struct macio_dev, ofdev)
  49
  50extern struct macio_dev *macio_dev_get(struct macio_dev *dev);
  51extern void macio_dev_put(struct macio_dev *dev);
  52
  53/*
  54 * Accessors to resources & interrupts and other device
  55 * fields
  56 */
  57
  58static inline int macio_resource_count(struct macio_dev *dev)
  59{
  60        return dev->n_resources;
  61}
  62
  63static inline unsigned long macio_resource_start(struct macio_dev *dev, int resource_no)
  64{
  65        return dev->resource[resource_no].start;
  66}
  67
  68static inline unsigned long macio_resource_end(struct macio_dev *dev, int resource_no)
  69{
  70        return dev->resource[resource_no].end;
  71}
  72
  73static inline unsigned long macio_resource_len(struct macio_dev *dev, int resource_no)
  74{
  75        struct resource *res = &dev->resource[resource_no];
  76        if (res->start == 0 || res->end == 0 || res->end < res->start)
  77                return 0;
  78        return res->end - res->start + 1;
  79}
  80
  81extern int macio_request_resource(struct macio_dev *dev, int resource_no, const char *name);
  82extern void macio_release_resource(struct macio_dev *dev, int resource_no);
  83extern int macio_request_resources(struct macio_dev *dev, const char *name);
  84extern void macio_release_resources(struct macio_dev *dev);
  85
  86static inline int macio_irq_count(struct macio_dev *dev)
  87{
  88        return dev->n_interrupts;
  89}
  90
  91static inline int macio_irq(struct macio_dev *dev, int irq_no)
  92{
  93        return dev->interrupt[irq_no].start;
  94}
  95
  96static inline void macio_set_drvdata(struct macio_dev *dev, void *data)
  97{
  98        dev_set_drvdata(&dev->ofdev.dev, data);
  99}
 100
 101static inline void* macio_get_drvdata(struct macio_dev *dev)
 102{
 103        return dev_get_drvdata(&dev->ofdev.dev);
 104}
 105
 106static inline struct device_node *macio_get_of_node(struct macio_dev *mdev)
 107{
 108        return mdev->ofdev.node;
 109}
 110
 111#ifdef CONFIG_PCI
 112static inline struct pci_dev *macio_get_pci_dev(struct macio_dev *mdev)
 113{
 114        return mdev->bus->pdev;
 115}
 116#endif
 117
 118/*
 119 * A driver for a mac-io chip based device
 120 */
 121struct macio_driver
 122{
 123        char                    *name;
 124        struct of_device_id     *match_table;
 125        struct module           *owner;
 126
 127        int     (*probe)(struct macio_dev* dev, const struct of_device_id *match);
 128        int     (*remove)(struct macio_dev* dev);
 129
 130        int     (*suspend)(struct macio_dev* dev, pm_message_t state);
 131        int     (*resume)(struct macio_dev* dev);
 132        int     (*shutdown)(struct macio_dev* dev);
 133
 134        struct device_driver    driver;
 135};
 136#define to_macio_driver(drv) container_of(drv,struct macio_driver, driver)
 137
 138extern int macio_register_driver(struct macio_driver *);
 139extern void macio_unregister_driver(struct macio_driver *);
 140
 141#endif /* __KERNEL__ */
 142#endif /* __MACIO_ASIC_H__ */
 143