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 platform_device  ofdev;
  42        struct device_dma_parameters dma_parms; /* ide needs that */
  43        int                     n_resources;
  44        struct resource         resource[MACIO_DEV_COUNT_RESOURCES];
  45        int                     n_interrupts;
  46        struct resource         interrupt[MACIO_DEV_COUNT_IRQS];
  47};
  48#define to_macio_device(d) container_of(d, struct macio_dev, ofdev.dev)
  49#define of_to_macio_device(d) container_of(d, struct macio_dev, ofdev)
  50
  51extern struct macio_dev *macio_dev_get(struct macio_dev *dev);
  52extern void macio_dev_put(struct macio_dev *dev);
  53
  54/*
  55 * Accessors to resources & interrupts and other device
  56 * fields
  57 */
  58
  59static inline int macio_resource_count(struct macio_dev *dev)
  60{
  61        return dev->n_resources;
  62}
  63
  64static inline unsigned long macio_resource_start(struct macio_dev *dev, int resource_no)
  65{
  66        return dev->resource[resource_no].start;
  67}
  68
  69static inline unsigned long macio_resource_end(struct macio_dev *dev, int resource_no)
  70{
  71        return dev->resource[resource_no].end;
  72}
  73
  74static inline unsigned long macio_resource_len(struct macio_dev *dev, int resource_no)
  75{
  76        struct resource *res = &dev->resource[resource_no];
  77        if (res->start == 0 || res->end == 0 || res->end < res->start)
  78                return 0;
  79        return resource_size(res);
  80}
  81
  82extern int macio_enable_devres(struct macio_dev *dev);
  83
  84extern int macio_request_resource(struct macio_dev *dev, int resource_no, const char *name);
  85extern void macio_release_resource(struct macio_dev *dev, int resource_no);
  86extern int macio_request_resources(struct macio_dev *dev, const char *name);
  87extern void macio_release_resources(struct macio_dev *dev);
  88
  89static inline int macio_irq_count(struct macio_dev *dev)
  90{
  91        return dev->n_interrupts;
  92}
  93
  94static inline int macio_irq(struct macio_dev *dev, int irq_no)
  95{
  96        return dev->interrupt[irq_no].start;
  97}
  98
  99static inline void macio_set_drvdata(struct macio_dev *dev, void *data)
 100{
 101        dev_set_drvdata(&dev->ofdev.dev, data);
 102}
 103
 104static inline void* macio_get_drvdata(struct macio_dev *dev)
 105{
 106        return dev_get_drvdata(&dev->ofdev.dev);
 107}
 108
 109static inline struct device_node *macio_get_of_node(struct macio_dev *mdev)
 110{
 111        return mdev->ofdev.dev.of_node;
 112}
 113
 114#ifdef CONFIG_PCI
 115static inline struct pci_dev *macio_get_pci_dev(struct macio_dev *mdev)
 116{
 117        return mdev->bus->pdev;
 118}
 119#endif
 120
 121/*
 122 * A driver for a mac-io chip based device
 123 */
 124struct macio_driver
 125{
 126        int     (*probe)(struct macio_dev* dev, const struct of_device_id *match);
 127        int     (*remove)(struct macio_dev* dev);
 128
 129        int     (*suspend)(struct macio_dev* dev, pm_message_t state);
 130        int     (*resume)(struct macio_dev* dev);
 131        int     (*shutdown)(struct macio_dev* dev);
 132
 133#ifdef CONFIG_PMAC_MEDIABAY
 134        void    (*mediabay_event)(struct macio_dev* dev, int mb_state);
 135#endif
 136        struct device_driver    driver;
 137};
 138#define to_macio_driver(drv) container_of(drv,struct macio_driver, driver)
 139
 140extern int macio_register_driver(struct macio_driver *);
 141extern void macio_unregister_driver(struct macio_driver *);
 142
 143#endif /* __KERNEL__ */
 144#endif /* __MACIO_ASIC_H__ */
 145