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/*
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 * USB keyboard/mouse constants
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 */
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typedef struct Chain Chain;
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typedef struct HidInterface HidInterface;
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typedef struct HidRepTempl HidRepTempl;
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enum {
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	Stack = 32 * 1024,
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	/* HID class subclass protocol ids */
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	PtrCSP		= 0x020103,	/* mouse.boot.hid */
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	KbdCSP		= 0x010103,	/* keyboard.boot.hid */
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	/* Requests */
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	Getproto	= 0x03,
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	Setidle		= 0x0a,
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	Setproto	= 0x0b,
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	/* protocols for SET_PROTO request */
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	Bootproto	= 0,
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	Reportproto	= 1,
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};
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enum {
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	/* keyboard modifier bits */
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	Mlctrl		= 0,
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	Mlshift		= 1,
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	Mlalt		= 2,
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	Mlgui		= 3,
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	Mrctrl		= 4,
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	Mrshift		= 5,
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	Mralt		= 6,
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	Mrgui		= 7,
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	/* masks for byte[0] */
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	Mctrl		= 1<<Mlctrl | 1<<Mrctrl,
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	Mshift		= 1<<Mlshift | 1<<Mrshift,
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	Malt		= 1<<Mlalt | 1<<Mralt,
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	Mcompose	= 1<<Mlalt,
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	Maltgr		= 1<<Mralt,
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	Mgui		= 1<<Mlgui | 1<<Mrgui,
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	MaxAcc = 3,			/* max. ptr acceleration */
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	PtrMask= 0xf,			/* 4 buttons: should allow for more. */
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};
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/*
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 * Plan 9 keyboard driver constants.
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 */
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enum {
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	/* Scan codes (see kbd.c) */
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	SCesc1		= 0xe0,		/* first of a 2-character sequence */
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	SCesc2		= 0xe1,
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	SClshift	= 0x2a,
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	SCrshift	= 0x36,
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	SCctrl		= 0x1d,
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	SCcompose	= 0x38,
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	Keyup		= 0x80,		/* flag bit */
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	Keymask		= 0x7f,		/* regular scan code bits */
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};
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int kbmain(Dev *d, int argc, char*argv[]);
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enum{
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	MaxChLen	= 64,	/* bytes */
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};
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struct Chain {
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	int	b;			/* offset start in bits, (first full) */
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	int	e;			/* offset end in bits (first empty) */
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	uchar	buf[MaxChLen];
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};
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#define MSK(nbits)		((1UL << (nbits)) - 1)
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#define IsCut(bbits, ebits)	(((ebits)/8 - (bbits)/8) > 0)
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enum {
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	KindPad = 0,
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	KindButtons,
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	KindX,
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	KindY,
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	KindWheel,
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	MaxVals	= 16,
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	MaxIfc	= 8,
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};
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struct HidInterface {
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	ulong	v[MaxVals];	/* one ulong per val should be enough */
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	uchar	kind[MaxVals];
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	int	nbits;
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	int	count;
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};
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struct HidRepTempl{
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	int	id;				/* id which may not be present */
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	uint	sz;				/* in bytes */
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	int	nifcs;
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	HidInterface ifcs[MaxIfc];
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};
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enum {
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	/* report types */
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	HidReportApp	= 0x01,
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	HidTypeUsgPg	= 0x05,
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	HidPgButts	= 0x09,
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	HidTypeRepSz	= 0x75,
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	HidTypeCnt	= 0x95,
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	HidCollection	= 0xa1,
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	HidTypeUsg	= 0x09,
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	HidPtr		= 0x01,
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	HidX		= 0x30,
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	HidY		= 0x31,
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	HidZ		= 0x32,
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	HidWheel	= 0x38,
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	HidInput	= 0x81,
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	HidReportId	= 0x85,
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	HidReportIdPtr	= 0x01,
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	HidEnd		= 0xc0,
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};
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void	dumpreport(HidRepTempl *templ);
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int	hidifcval(HidRepTempl *templ, int kind, int n);
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int	parsereport(HidRepTempl *templ, Chain *rep);
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int	parsereportdesc(HidRepTempl *temp, uchar *repdesc, int repsz);