#include "u.h"
#include "../port/lib.h"
#include "mem.h"
#include "dat.h"
#include "fns.h"
#include "io.h"


enum
{
	 /* superio configuration registers */
	SioFER =	0x0,		/* function enable register */
	SioFAR =	0x1,		/* function address register */
	SioPTR =	0x2,		/* power and test egister */
	SioFCR =	0x3,		/* function control register */
	SioPCR =	0x4,		/* printer control register */
	SioKRR =	0x5,		/* keyboard and RTC control register */
	SioPMC =	0x6,		/* power mgmt control register */
	SioTUP =	0x7,		/* tape uart and parallel register */
	SioSID =	0x8,		/* SuperIO ID register */
	SioASC =	0x9,		/* Advanced SIO Config register */
	SioCS0CF0 =	0xA,		/* Chip select 0 config register 0 */
	SioCS0CF1 =	0xB,		/* Chip select 0 config register 1 */
	SioCS1CF0 =	0xC,		/* Chip select 1 config register 0 */
	SioCS1CF1 = 	0xD,		/* Chip select 1 config register 1 */

	 /* FER bits */
	PPTEnable = 	1<<0,
	EnableUART1 = 	1<<1,
	EnableUART2 = 	1<<2,
	FDCEnable = 	1<<3,
	FDC4 =	 	1<<4,
	FDC2ndAddr = 	1<<5,
	IDEEnable = 	1<<6,
	IDE2ndAddr = 	1<<7,

	 /* FAR bits */
	PPTAddr =	3<<0,
	UART1Addr = 	3<<2,
	UART2Addr =	3<<4,
	SelectCom3n4 = 	3<<6,

	 /* PTR bits */
	PWDN = 		1<<0,
	ClkPWDN = 	1<<1,
	PWDNSelect = 	1<<2,
	IRQSelect = 	1<<3,
	UART1Test = 	1<<4,
	UART2Test = 	1<<5,
	LockConfig = 	1<<6,
	XtndPPTSelect =	1<<7,

	 /* FCR bits */
	MediaSense =	1<<0,
	DatRateSelect =	1<<0,
	IDENTSelect = 	1<<1,
	PPTFloat = 	1<<3,
	LogicalDrvXcg =	1<<4,	/* logical drive exchange */
	EnaZeroWait = 	1<<5,	/* zero wait state enable *.

	 /* PCR bits */
	EPPEnable =	1<<0,
	EPPVersionSel =	1<<1,
	ECPEnable = 	1<<2,
	ECPClkFreeze = 	1<<3,
	PPTIntPolar = 	1<<5,
	PPTIntIOCtl = 	1<<6,
	RTCRamMask =	1<<7,

	 /* KRR bits */
	KBCEnable =	1<<0,
	KBCSpeedCtl = 	1<<1,
	EnaProgAccess =	1<<2,
	RTCEnable = 	1<<3,
	RTCClkTst = 	1<<4,
	RAMSEL = 	1<<5,
	EnaChipSelect =	1<<6,
	KBCClkSource =	1<<7,

	 /* PMC bits */
	IDETriStCtl =	1<<0,
	FDCTriStCtl = 	1<<1,
	UARTTriStCtl = 	1<<2,
	SelectiveLock =	1<<5,
	PPTriStEna = 	1<<6,

	 /* TUP bits */
	EPPToutIntEna =	1<<2,

	 /* SID bits are just data values */

	 /* ASC bits */
	IRQ5Select = 	1<<0,
	DRATE0Select =	1<<0,
	DRV2Select = 	1<<1,
	DR23Select = 	1<<1,
	EnhancedTDR = 	1<<2,
	ECPCnfgABit3 = 	1<<5,
	SystemOpMode0 =	1<<6,
	SystemOpMode1 =	1<<7,

	 /* CS0CF0 bits are LA0-LA7 */
	 /* CS1CF0 bits are LA0-LA7 */
	 /* CSxCF1 bits (x=0,1) */
	HA8 =		1<<0,
	HA9 = 		1<<1,
	HA10 = 		1<<2,
	EnaCSWr = 	1<<4,
	EnaCSRd =	1<<5,
	CSAdrDcode =	1<<6,	/* enable full addr decode */
	CSSelectPin =	1<<7,	/* CS/CS0 and SYSCLK/CS1 select pin */
};

typedef struct SuperIO SuperIO;

struct SuperIO
{
	ulong va;
	uchar *index;	/* superio index register */
	uchar *data;	/* superio data register */

	uchar *mkctl;	/* superio mouse/kbd control register */
	uchar *mkdata;	/* superio mouse/kbd data register */
};


static SuperIO sio;

static void printstatus(uchar status);

void
superioinit(ulong va, uchar *sindex, uchar *sdata, uchar *mkctl, uchar *mkdata)
{
	sio.va = va;

	sio.index = sindex;
	sio.data = sdata;

	sio.mkctl = mkctl;
	sio.mkdata = mkdata;
}


ulong
superiova(void)
{
	return sio.va;
}

enum
{
	OBF =		1<<0,
	IBF =		1<<1,
	SysFlag =	1<<2,
	LastWrWasCmd = 	1<<3,
	KbdEnabled =	1<<4,
	FromMouse = 	1<<5,
	Timeout = 	1<<6,
	ParityError = 	1<<7
};

uchar
superio_readctl(void)
{
	return *sio.mkctl;
}

uchar
superio_readdata(void)
{
	return *sio.mkdata;
}

void
superio_writectl(uchar val)
{
	*sio.mkctl = val;
}

void
superio_writedata(uchar val)
{
	*sio.mkdata = val;
}


static  void
printstatus(uchar status)
{
	print("0x%2.2ux = <",status);
	if(status & OBF) print("OBF|");
	if(status & IBF) print("IBF|");
	if(status & SysFlag) print("SysFlag|"); 
	if(status & LastWrWasCmd) print("LastWrWasCmd|");
	if(status & KbdEnabled) print("KbdEnabled|"); 
	if(status & FromMouse) print("FromMouse|");
	if(status & Timeout) print("Timeout|"); 
	if(status & ParityError) print("ParityErr|"); 
	print(">");
}

void
testit()
{
	uchar status;
	uchar val;

	for(;;) {
		status = *sio.mkctl;
		if(status&OBF) {
			printstatus(status);
			val = *sio.mkdata;
			print(", data = 0x%2.2ux\n",val);
		}
	}
}