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 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
  51 extern struct macio_dev *macio_dev_get(struct macio_dev *dev);
  52 extern void macio_dev_put(struct macio_dev *dev);
  53
  54 /*
  55  * Accessors to resources & interrupts and other device
  56  * fields
  57  */
  58
  59 static inline int macio_resource_count(struct macio_dev *dev)
  60 {
  61         return dev->n_resources;
  62 }
  63
  64 static inline unsigned long macio_resource_start(struct macio_dev *dev, int resource_no)
  65 {
  66         return dev->resource[resource_no].start;
  67 }
  68
  69 static inline unsigned long macio_resource_end(struct macio_dev *dev, int resource_no)
  70 {
  71         return dev->resource[resource_no].end;
  72 }
  73
  74 static 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
  82 extern int macio_enable_devres(struct macio_dev *dev);
  83
  84 extern int macio_request_resource(struct macio_dev *dev, int resource_no, const char *name);
  85 extern void macio_release_resource(struct macio_dev *dev, int resource_no);
  86 extern int macio_request_resources(struct macio_dev *dev, const char *name);
  87 extern void macio_release_resources(struct macio_dev *dev);
  88
  89 static inline int macio_irq_count(struct macio_dev *dev)
  90 {
  91         return dev->n_interrupts;
  92 }
  93
  94 static inline int macio_irq(struct macio_dev *dev, int irq_no)
  95 {
  96         return dev->interrupt[irq_no].start;
  97 }
  98
  99 static inline void macio_set_drvdata(struct macio_dev *dev, void *data)
 100 {
 101         dev_set_drvdata(&dev->ofdev.dev, data);
 102 }
 103
 104 static inline void* macio_get_drvdata(struct macio_dev *dev)
 105 {
 106         return dev_get_drvdata(&dev->ofdev.dev);
 107 }
 108
 109 static 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
 115 static 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  */
 124 struct 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
 140 extern int macio_register_driver(struct macio_driver *);
 141 extern void macio_unregister_driver(struct macio_driver *);
 142
 143 #endif /* __KERNEL__ */
 144 #endif /* __MACIO_ASIC_H__ */