hid.h

Axis 221 camera embedded programing interface

#define HID_QUIRK_POWERBOOK_ISO_KEYBOARD        0x00008000
#define HID_QUIRK_BAD_RELATIVE_KEYS		0x00010000

/*
 * This is the global environment of the parser. This information is
 * persistent for main-items. The global environment can be saved and
 * restored with PUSH/POP statements.
 */

struct hid_global {
	unsigned usage_page;
	__s32    logical_minimum;
	__s32    logical_maximum;
	__s32    physical_minimum;
	__s32    physical_maximum;
	__s32    unit_exponent;
	unsigned unit;
	unsigned report_id;
	unsigned report_size;
	unsigned report_count;
};

/*
 * This is the local environment. It is persistent up the next main-item.
 */

#define HID_MAX_DESCRIPTOR_SIZE		4096
#define HID_MAX_USAGES			1024
#define HID_DEFAULT_NUM_COLLECTIONS	16

struct hid_local {
	unsigned usage[HID_MAX_USAGES]; /* usage array */
	unsigned collection_index[HID_MAX_USAGES]; /* collection index array */
	unsigned usage_index;
	unsigned usage_minimum;
	unsigned delimiter_depth;
	unsigned delimiter_branch;
};

/*
 * This is the collection stack. We climb up the stack to determine
 * application and function of each field.
 */

struct hid_collection {
	unsigned type;
	unsigned usage;
	unsigned level;
};

struct hid_usage {
	unsigned  hid;			/* hid usage code */
	unsigned  collection_index;	/* index into collection array */
	/* hidinput data */
	__u16     code;			/* input driver code */
	__u8      type;			/* input driver type */
	__s8	  hat_min;		/* hat switch fun */
	__s8	  hat_max;		/* ditto */
	__s8	  hat_dir;		/* ditto */
};

struct hid_input;

struct hid_field {
	unsigned  physical;		/* physical usage for this field */
	unsigned  logical;		/* logical usage for this field */
	unsigned  application;		/* application usage for this field */
	struct hid_usage *usage;	/* usage table for this function */
	unsigned  maxusage;		/* maximum usage index */
	unsigned  flags;		/* main-item flags (i.e. volatile,array,constant) */
	unsigned  report_offset;	/* bit offset in the report */
	unsigned  report_size;		/* size of this field in the report */
	unsigned  report_count;		/* number of this field in the report */
	unsigned  report_type;		/* (input,output,feature) */
	__s32    *value;		/* last known value(s) */
	__s32     logical_minimum;
	__s32     logical_maximum;
	__s32     physical_minimum;
	__s32     physical_maximum;
	__s32     unit_exponent;
	unsigned  unit;
	struct hid_report *report;	/* associated report */
	unsigned index;			/* index into report->field[] */
	/* hidinput data */
	struct hid_input *hidinput;	/* associated input structure */
	__u16 dpad;			/* dpad input code */
};

#define HID_MAX_FIELDS 64

struct hid_report {
	struct list_head list;
	unsigned id;					/* id of this report */
	unsigned type;					/* report type */
	struct hid_field *field[HID_MAX_FIELDS];	/* fields of the report */
	unsigned maxfield;				/* maximum valid field index */
	unsigned size;					/* size of the report (bits) */
	struct hid_device *device;			/* associated device */
};

struct hid_report_enum {
	unsigned numbered;
	struct list_head report_list;
	struct hid_report *report_id_hash[256];
};

#define HID_REPORT_TYPES 3

#define HID_MIN_BUFFER_SIZE	64		/* make sure there is at least a packet size of space */
#define HID_MAX_BUFFER_SIZE	4096		/* 4kb */
#define HID_CONTROL_FIFO_SIZE	256		/* to init devices with >100 reports */
#define HID_OUTPUT_FIFO_SIZE	64

struct hid_control_fifo {
	unsigned char dir;
	struct hid_report *report;
};

#define HID_CLAIMED_INPUT	1
#define HID_CLAIMED_HIDDEV	2

#define HID_CTRL_RUNNING	1
#define HID_OUT_RUNNING		2
#define HID_IN_RUNNING		3
#define HID_RESET_PENDING	4
#define HID_SUSPENDED		5
#define HID_CLEAR_HALT		6

struct hid_input {
	struct list_head list;
	struct hid_report *report;
	struct input_dev *input;
};

struct hid_device {							/* device report descriptor */
	 __u8 *rdesc;
	unsigned rsize;
	struct hid_collection *collection;				/* List of HID collections */
	unsigned collection_size;					/* Number of allocated hid_collections */
	unsigned maxcollection;						/* Number of parsed collections */
	unsigned maxapplication;					/* Number of applications */
	unsigned short bus;                                             /* BUS ID */
	unsigned short vendor;                                          /* Vendor ID */
	unsigned short product;                                         /* Product ID */
	unsigned version;						/* HID version */
	unsigned country;						/* HID country */
	struct hid_report_enum report_enum[HID_REPORT_TYPES];

	struct device *dev;						/* device */

	unsigned claimed;						/* Claimed by hidinput, hiddev? */
	unsigned quirks;						/* Various quirks the device can pull on us */

	struct list_head inputs;					/* The list of inputs */
	void *hiddev;							/* The hiddev structure */
	int minor;							/* Hiddev minor number */

	wait_queue_head_t wait;						/* For sleeping */

	int open;							/* is the device open by anyone? */
	char name[128];							/* Device name */
	char phys[64];							/* Device physical location */
	char uniq[64];							/* Device unique identifier (serial #) */

	void *driver_data;

	/* device-specific function pointers */
	int (*hidinput_input_event) (struct input_dev *, unsigned int, unsigned int, int);
	int (*hidinput_open) (struct input_dev *);
	void (*hidinput_close) (struct input_dev *);

	/* hiddev event handler */
	void (*hiddev_hid_event) (struct hid_device *, struct hid_field *field,
				  struct hid_usage *, __s32);
	void (*hiddev_report_event) (struct hid_device *, struct hid_report *);
#ifdef CONFIG_USB_HIDINPUT_POWERBOOK
	unsigned long pb_pressed_fn[NBITS(KEY_MAX)];
	unsigned long pb_pressed_numlock[NBITS(KEY_MAX)];
#endif
};

#define HID_GLOBAL_STACK_SIZE 4
#define HID_COLLECTION_STACK_SIZE 4

struct hid_parser {
	struct hid_global     global;
	struct hid_global     global_stack[HID_GLOBAL_STACK_SIZE];
	unsigned              global_stack_ptr;
	struct hid_local      local;
	unsigned              collection_stack[HID_COLLECTION_STACK_SIZE];
	unsigned              collection_stack_ptr;
	struct hid_device    *device;
};

struct hid_class_descriptor {
	__u8  bDescriptorType;
	__u16 wDescriptorLength;
} __attribute__ ((packed));

struct hid_descriptor {
	__u8  bLength;
	__u8  bDescriptorType;
	__u16 bcdHID;
	__u8  bCountryCode;
	__u8  bNumDescriptors;

	struct hid_class_descriptor desc[1];
} __attribute__ ((packed));

#ifdef DEBUG
#include "hid-debug.h"
#else
#define hid_dump_input(a,b)	do { } while (0)
#define hid_dump_device(c)	do { } while (0)
#define hid_dump_field(a,b)	do { } while (0)
#define resolv_usage(a)		do { } while (0)
#define resolv_event(a,b)	do { } while (0)
#endif

/* Applications from HID Usage Tables 4/8/99 Version 1.1 */
/* We ignore a few input applications that are not widely used */
#define IS_INPUT_APPLICATION(a) (((a >= 0x00010000) && (a <= 0x00010008)) || (a == 0x00010080) || (a == 0x000c0001))

/* HID core API */
extern void hidinput_hid_event(struct hid_device *, struct hid_field *, struct hid_usage *, __s32);
extern void hidinput_report_event(struct hid_device *hid, struct hid_report *report);
extern int hidinput_connect(struct hid_device *);
extern void hidinput_disconnect(struct hid_device *);

int hid_set_field(struct hid_field *, unsigned, __s32);
int hid_input_report(struct hid_device *, int type, u8 *, int, int);
int hidinput_find_field(struct hid_device *hid, unsigned int type, unsigned int code, struct hid_field **field);
void hid_input_field(struct hid_device *hid, struct hid_field *field, __u8 *data, int interrupt);
void hid_output_report(struct hid_report *report, __u8 *data);
void hid_free_device(struct hid_device *device);
struct hid_device *hid_parse_report(__u8 *start, unsigned size);

#ifdef CONFIG_HID_FF
int hid_ff_init(struct hid_device *hid);

int hid_lgff_init(struct hid_device *hid);
int hid_tmff_init(struct hid_device *hid);
int hid_zpff_init(struct hid_device *hid);
#ifdef CONFIG_HID_PID
int hid_pidff_init(struct hid_device *hid);
#else
static inline int hid_pidff_init(struct hid_device *hid) { return -ENODEV; }
#endif

#else
static inline int hid_ff_init(struct hid_device *hid) { return -1; }
#endif
#ifdef DEBUG
#define dbg(format, arg...) printk(KERN_DEBUG "%s: " format "\n" , \
		__FILE__ , ## arg)
#else
#define dbg(format, arg...) do {} while (0)
#endif

#define err(format, arg...) printk(KERN_ERR "%s: " format "\n" , \
		__FILE__ , ## arg)
#endif