include/asm-ppc/macio.h

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