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
   7 extern struct bus_type macio_bus_type;
   8
   9 /* MacIO device driver is defined later */
  10 struct macio_driver;
  11 struct 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  */
  24 struct 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  */
  37 struct 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
  50 extern struct macio_dev *macio_dev_get(struct macio_dev *dev);
  51 extern void macio_dev_put(struct macio_dev *dev);
  52
  53 /*
  54  * Accessors to resources & interrupts and other device
  55  * fields
  56  */
  57
  58 static inline int macio_resource_count(struct macio_dev *dev)
  59 {
  60         return dev->n_resources;
  61 }
  62
  63 static inline unsigned long macio_resource_start(struct macio_dev *dev, int resource_no)
  64 {
  65         return dev->resource[resource_no].start;
  66 }
  67
  68 static inline unsigned long macio_resource_end(struct macio_dev *dev, int resource_no)
  69 {
  70         return dev->resource[resource_no].end;
  71 }
  72
  73 static 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
  81 extern int macio_request_resource(struct macio_dev *dev, int resource_no, const char *name);
  82 extern void macio_release_resource(struct macio_dev *dev, int resource_no);
  83 extern int macio_request_resources(struct macio_dev *dev, const char *name);
  84 extern void macio_release_resources(struct macio_dev *dev);
  85
  86 static inline int macio_irq_count(struct macio_dev *dev)
  87 {
  88         return dev->n_interrupts;
  89 }
  90
  91 static inline int macio_irq(struct macio_dev *dev, int irq_no)
  92 {
  93         return dev->interrupt[irq_no].start;
  94 }
  95
  96 static inline void macio_set_drvdata(struct macio_dev *dev, void *data)
  97 {
  98         dev_set_drvdata(&dev->ofdev.dev, data);
  99 }
 100
 101 static inline void* macio_get_drvdata(struct macio_dev *dev)
 102 {
 103         return dev_get_drvdata(&dev->ofdev.dev);
 104 }
 105
 106 static inline struct device_node *macio_get_of_node(struct macio_dev *mdev)
 107 {
 108         return mdev->ofdev.node;
 109 }
 110
 111 #ifdef CONFIG_PCI
 112 static 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  */
 121 struct 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
 138 extern int macio_register_driver(struct macio_driver *);
 139 extern void macio_unregister_driver(struct macio_driver *);
 140
 141 #endif /* __KERNEL__ */
 142 #endif /* __MACIO_ASIC_H__ */