Data structures

The project is under development and new structure will be added and/or older structures will be modified. As of now, following structure are defined in the parallel_interface.h header file :

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struct pi_device_id

struct pi_device_id {
    char name[PI_NAME_SIZE];
    kernel_ulong_t driver_data;
};

• pi_device_id Structure to be used in a device-driver to supply the device id used to match a device.

  @name The name of the device that needs to be matched with the driver. @driver_data The device specific data that will be needed by the device driver once its matched

| Definition |

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struct pi_bus_host

 struct pi_bus_host {
     struct device dev;
 };

• pi_bus_host The structure to be used for bus host device.

  @dev The device member of the structure.

| Definition |

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struct pi_device

 struct pi_device {
    struct pi_bus_host *pibushost;
    char modalias[PI_MODALIAS_LENGTH];
    struct device dev;
 };

• pi_device The structure to be used for a client device on the pi bus.

  @pibushost The bus host device to which the client device is connected. @modalias The modalias value associated with the device node. @dev The member device of the pi_device structure.

| Definition |

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struct pi_driver

struct pi_driver {
    const struct pi_device_id *id_table;
    struct device_driver driver;
    int (*probe)(struct pi_device *dev);
    void (*remove)(struct pi_device *dev);
    void (*callback)(struct pi_device *, void *, int, void *, u32);
};

 pi_driver     The structure to be used by the device-driver to register
 	           itself as a device driver onto the pi-bus.
 
 @id_table     The table containing ids of the device supported by the device
               driver.
 @driver       The device_driver member of the pi_driver structure.
 @probe        The device driver probe method.
 @remove       The device driver remove method.
 @callback     The device driver callback method that will be called when
               there is some data from the device for the driver.

| Definition |