112 lines
3.9 KiB
C
112 lines
3.9 KiB
C
#ifndef DRIVER_H
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#define DRIVER_H
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#define MAX_DRIVER_NAME 16
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#define DEVICE_TYPE_UNKNOWN 0
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#define DEVICE_TYPE_ETHER 1
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#define DEVICE_TYPE_CONSOLE 2
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#define DEVICE_TYPE_DRAM 3
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#define DEVICE_TYPE_BLOCK 4
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#define DEVICE_TYPE_FS 5
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#define MAX_DEVICE_TYPE 5
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#include <param.h>
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struct device_d {
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char name[MAX_DRIVER_NAME]; /* The name of this device. Used to match
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* to the corresponding driver.
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*/
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char id[MAX_DRIVER_NAME];
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unsigned long size;
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/* For devices which are directly mapped into memory, i.e. NOR Flash or
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* SDRAM.
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*/
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unsigned long map_base;
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void *platform_data; /* board specific information about this device */
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void *priv; /* data private to the driver */
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void *type_data; /* In case this device is a specific device, this pointer
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* points to the type specific device, i.e. eth_device
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*/
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struct driver_d *driver; /* The driver for this device */
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struct device_d *next;
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unsigned long type;
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struct param_d *param;
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};
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struct driver_d {
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char name[MAX_DRIVER_NAME]; /* The name of this driver. Used to match to
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* the corresponding device.
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*/
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struct driver_d *next;
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int (*probe) (struct device_d *);
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int (*remove)(struct device_d *);
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ssize_t (*read) (struct device_d*, void* buf, size_t count, ulong offset, ulong flags);
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ssize_t (*write) (struct device_d*, const void* buf, size_t count, ulong offset, ulong flags);
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ssize_t (*erase) (struct device_d*, size_t count, unsigned long offset);
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void (*info) (struct device_d *);
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void (*shortinfo) (struct device_d *);
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unsigned long type;
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void *type_data; /* In case this driver is of a specific type, i.e. a filesystem
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* driver, this pointer points to the corresponding data struct
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*/
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};
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#define RW_SIZE(x) (x)
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#define RW_SIZE_MASK 0x7
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/* Register/unregister devices and drivers. Since we don't have modules
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* we do not need a driver_unregister function.
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*/
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int register_driver(struct driver_d *);
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int register_device(struct device_d *);
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void unregister_device(struct device_d *);
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/* Iterate through the devices of a given type. if last is NULL, the
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* first device of this type is returned. Put this pointer in as
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* 'last' to get the next device. This functions returns NULL if no
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* more devices are found.
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*/
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struct device_d *get_device_by_type(ulong type, struct device_d *last);
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struct device_d *get_device_by_id(const char *id);
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struct device_d *get_first_device(void);
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/* Find a free device id from the given template. This is archieved by
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* appending a number to the template. Dynamically created devices should
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* use this function rather than filling the id field themselves.
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*/
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int get_free_deviceid(char *id, char *id_template);
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struct device_d *device_from_spec_str(const char *str, char **endp);
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char *deviceid_from_spec_str(const char *str, char **endp);
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/* Find a driver with the given name. Currently the filesystem implementation
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* uses this to get the driver from the name the user specifies with the
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* mount command
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*/
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struct driver_d *get_driver_by_name(const char *name);
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ssize_t dev_read(struct device_d *dev, void *buf, size_t count, ulong offset, ulong flags);
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ssize_t dev_write(struct device_d *dev, const void *buf, size_t count, ulong offset, ulong flags);
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ssize_t dev_erase(struct device_d *dev, size_t count, unsigned long offset);
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/* These are used by drivers which work with direct memory accesses */
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ssize_t mem_read(struct device_d *dev, void *buf, size_t count, ulong offset, ulong flags);
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ssize_t mem_write(struct device_d *dev, const void *buf, size_t count, ulong offset, ulong flags);
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/* Use this if you have nothing to do in your drivers probe function */
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int dummy_probe(struct device_d *);
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#endif /* DRIVER_H */
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