drivers/net/wireless/iwlwifi/iwl-bus.h

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  63 #ifndef __iwl_bus_h__
  64 #define __iwl_bus_h__
  65
  66 /*This file includes the declaration that are exported from the bus layer */
  67
  68 #include <linux/types.h>
  69 #include <linux/spinlock.h>
  70
  71 struct iwl_shared;
  72 struct iwl_bus;
  73
  74 /**
  75  * struct iwl_bus_ops - bus specific operations
  76  * @get_pm_support: must returns true if the bus can go to sleep
  77  * @apm_config: will be called during the config of the APM configuration
  78  * @set_drv_data: set the shared data pointer to the bus layer
  79  * @get_hw_id: prints the hw_id in the provided buffer
  80  * @write8: write a byte to register at offset ofs
  81  * @write32: write a dword to register at offset ofs
  82  * @wread32: read a dword at register at offset ofs
  83  */
  84 struct iwl_bus_ops {
  85         bool (*get_pm_support)(struct iwl_bus *bus);
  86         void (*apm_config)(struct iwl_bus *bus);
  87         void (*set_drv_data)(struct iwl_bus *bus, struct iwl_shared *shrd);
  88         void (*get_hw_id)(struct iwl_bus *bus, char buf[], int buf_len);
  89         void (*write8)(struct iwl_bus *bus, u32 ofs, u8 val);
  90         void (*write32)(struct iwl_bus *bus, u32 ofs, u32 val);
  91         u32 (*read32)(struct iwl_bus *bus, u32 ofs);
  92 };
  93
  94 /**
  95  * struct iwl_bus - bus common data
  96  * @dev - pointer to struct device * that represent the device
  97  * @ops - pointer to iwl_bus_ops
  98  * @shrd - pointer to iwl_shared which holds shared data from the upper layer
  99  * @irq - the irq number for the device
 100  * @reg_lock - protect hw register access
 101  */
 102 struct iwl_bus {
 103         /* Common data to all buses */
 104         struct device *dev;
 105         const struct iwl_bus_ops *ops;
 106         struct iwl_shared *shrd;
 107
 108         unsigned int irq;
 109         spinlock_t reg_lock;
 110
 111         /* pointer to bus specific struct */
 112         /*Ensure that this pointer will always be aligned to sizeof pointer */
 113         char bus_specific[0] __attribute__((__aligned__(sizeof(void *))));
 114 };
 115
 116 static inline bool bus_get_pm_support(struct iwl_bus *bus)
 117 {
 118         return bus->ops->get_pm_support(bus);
 119 }
 120
 121 static inline void bus_apm_config(struct iwl_bus *bus)
 122 {
 123         bus->ops->apm_config(bus);
 124 }
 125
 126 static inline void bus_set_drv_data(struct iwl_bus *bus,
 127                                 struct iwl_shared *shrd)
 128 {
 129         bus->ops->set_drv_data(bus, shrd);
 130 }
 131
 132 static inline void bus_get_hw_id(struct iwl_bus *bus, char buf[], int buf_len)
 133 {
 134         bus->ops->get_hw_id(bus, buf, buf_len);
 135 }
 136
 137 static inline void bus_write8(struct iwl_bus *bus, u32 ofs, u8 val)
 138 {
 139         bus->ops->write8(bus, ofs, val);
 140 }
 141
 142 static inline void bus_write32(struct iwl_bus *bus, u32 ofs, u32 val)
 143 {
 144         bus->ops->write32(bus, ofs, val);
 145 }
 146
 147 static inline u32 bus_read32(struct iwl_bus *bus, u32 ofs)
 148 {
 149         return bus->ops->read32(bus, ofs);
 150 }
 151
 152 int __must_check iwl_pci_register_driver(void);
 153 void iwl_pci_unregister_driver(void);
 154
 155 #endif /* __iwl_bus_h__ */