moxa.c

Linux Kernel 2.6.9 for OMAP1710

 */
#define Rx_over		0x01
#define Xoff_state	0x02
#define Tx_flowOff	0x04
#define Tx_enable	0x08
#define CTS_state	0x10
#define DSR_state	0x20
#define DCD_state	0x80
/*
 *    FlowControl
 */
#define CTS_FlowCtl	1
#define RTS_FlowCtl	2
#define Tx_FlowCtl	4
#define Rx_FlowCtl	8
#define IXM_IXANY	0x10

#define LowWater	128

#define DTR_ON		1
#define RTS_ON		2
#define CTS_ON		1
#define DSR_ON		2
#define DCD_ON		8

/* mode definition */
#define	MX_CS8		0x03
#define	MX_CS7		0x02
#define	MX_CS6		0x01
#define	MX_CS5		0x00

#define	MX_STOP1	0x00
#define	MX_STOP15	0x04
#define	MX_STOP2	0x08

#define	MX_PARNONE	0x00
#define	MX_PAREVEN	0x40
#define	MX_PARODD	0xC0

/*
 *    Query
 */
#define QueryPort	MAX_PORTS



struct mon_str {
	int tick;
	int rxcnt[MAX_PORTS];
	int txcnt[MAX_PORTS];
};
typedef struct mon_str mon_st;

#define 	DCD_changed	0x01
#define 	DCD_oldstate	0x80

static unsigned char moxaBuff[10240];
static unsigned long moxaIntNdx[MAX_BOARDS];
static unsigned long moxaIntPend[MAX_BOARDS];
static unsigned long moxaIntTable[MAX_BOARDS];
static char moxaChkPort[MAX_PORTS];
static char moxaLineCtrl[MAX_PORTS];
static unsigned long moxaTableAddr[MAX_PORTS];
static long moxaCurBaud[MAX_PORTS];
static char moxaDCDState[MAX_PORTS];
static char moxaLowChkFlag[MAX_PORTS];
static int moxaLowWaterChk;
static int moxaCard;
static mon_st moxaLog;
static int moxaFuncTout;
static ushort moxaBreakCnt[MAX_PORTS];

static void moxadelay(int);
static void moxafunc(unsigned long, int, ushort);
static void wait_finish(unsigned long);
static void low_water_check(unsigned long);
static int moxaloadbios(int, unsigned char __user *, int);
static int moxafindcard(int);
static int moxaload320b(int, unsigned char __user *, int);
static int moxaloadcode(int, unsigned char __user *, int);
static int moxaloadc218(int, unsigned long, int);
static int moxaloadc320(int, unsigned long, int, int *);

/*****************************************************************************
 *	Driver level functions: 					     *
 *	1. MoxaDriverInit(void);					     *
 *	2. MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port);   *
 *	3. MoxaDriverPoll(void);					     *
 *****************************************************************************/
void MoxaDriverInit(void)
{
	int i;

	moxaFuncTout = HZ / 2;	/* 500 mini-seconds */
	moxaCard = 0;
	moxaLog.tick = 0;
	moxaLowWaterChk = 0;
	for (i = 0; i < MAX_PORTS; i++) {
		moxaChkPort[i] = 0;
		moxaLowChkFlag[i] = 0;
		moxaLineCtrl[i] = 0;
		moxaLog.rxcnt[i] = 0;
		moxaLog.txcnt[i] = 0;
	}
}

#define	MOXA		0x400
#define MOXA_GET_IQUEUE 	(MOXA + 1)	/* get input buffered count */
#define MOXA_GET_OQUEUE 	(MOXA + 2)	/* get output buffered count */
#define MOXA_INIT_DRIVER	(MOXA + 6)	/* moxaCard=0 */
#define MOXA_LOAD_BIOS		(MOXA + 9)	/* download BIOS */
#define MOXA_FIND_BOARD		(MOXA + 10)	/* Check if MOXA card exist? */
#define MOXA_LOAD_C320B		(MOXA + 11)	/* download 320B firmware */
#define MOXA_LOAD_CODE		(MOXA + 12)	/* download firmware */
#define MOXA_GETDATACOUNT       (MOXA + 23)
#define MOXA_GET_IOQUEUE	(MOXA + 27)
#define MOXA_FLUSH_QUEUE	(MOXA + 28)
#define MOXA_GET_CONF		(MOXA + 35)	/* configuration */
#define MOXA_GET_MAJOR          (MOXA + 63)
#define MOXA_GET_CUMAJOR        (MOXA + 64)
#define MOXA_GETMSTATUS         (MOXA + 65)


struct moxaq_str {
	int inq;
	int outq;
};

struct dl_str {
	char __user *buf;
	int len;
	int cardno;
};

static struct moxaq_str temp_queue[MAX_PORTS];
static struct dl_str dltmp;

void MoxaPortFlushData(int port, int mode)
{
	unsigned long ofsAddr;
	if ((mode < 0) || (mode > 2))
		return;
	ofsAddr = moxaTableAddr[port];
	moxafunc(ofsAddr, FC_FlushQueue, mode);
	if (mode != 1) {
		moxaLowChkFlag[port] = 0;
		low_water_check(ofsAddr);
	}
}

int MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port)
{
	int i;
	int status;
	int MoxaPortTxQueue(int), MoxaPortRxQueue(int);
	void __user *argp = (void __user *)arg;

	if (port == QueryPort) {
		if ((cmd != MOXA_GET_CONF) && (cmd != MOXA_INIT_DRIVER) &&
		    (cmd != MOXA_LOAD_BIOS) && (cmd != MOXA_FIND_BOARD) && (cmd != MOXA_LOAD_C320B) &&
		 (cmd != MOXA_LOAD_CODE) && (cmd != MOXA_GETDATACOUNT) &&
		  (cmd != MOXA_GET_IOQUEUE) && (cmd != MOXA_GET_MAJOR) &&
		    (cmd != MOXA_GET_CUMAJOR) && (cmd != MOXA_GETMSTATUS))
			return (-EINVAL);
	}
	switch (cmd) {
	case MOXA_GET_CONF:
		if(copy_to_user(argp, &moxa_boards, MAX_BOARDS * sizeof(moxa_board_conf)))
			return -EFAULT;
		return (0);
	case MOXA_INIT_DRIVER:
		if ((int) arg == 0x404)
			MoxaDriverInit();
		return (0);
	case MOXA_GETDATACOUNT:
		moxaLog.tick = jiffies;
		if(copy_to_user(argp, &moxaLog, sizeof(mon_st)))
			return -EFAULT;
		return (0);
	case MOXA_FLUSH_QUEUE:
		MoxaPortFlushData(port, arg);
		return (0);
	case MOXA_GET_IOQUEUE:
		for (i = 0; i < MAX_PORTS; i++) {
			if (moxaChkPort[i]) {
				temp_queue[i].inq = MoxaPortRxQueue(i);
				temp_queue[i].outq = MoxaPortTxQueue(i);
			}
		}
		if(copy_to_user(argp, temp_queue, sizeof(struct moxaq_str) * MAX_PORTS))
			return -EFAULT;
		return (0);
	case MOXA_GET_OQUEUE:
		i = MoxaPortTxQueue(port);
		return put_user(i, (unsigned long __user *)argp);
	case MOXA_GET_IQUEUE:
		i = MoxaPortRxQueue(port);
		return put_user(i, (unsigned long __user *)argp);
	case MOXA_GET_MAJOR:
		if(copy_to_user(argp, &ttymajor, sizeof(int)))
			return -EFAULT;
		return 0;
	case MOXA_GET_CUMAJOR:
		i = 0;
		if(copy_to_user(argp, &i, sizeof(int)))
			return -EFAULT;
		return 0;
	case MOXA_GETMSTATUS:
		for (i = 0; i < MAX_PORTS; i++) {
			GMStatus[i].ri = 0;
			GMStatus[i].dcd = 0;
			GMStatus[i].dsr = 0;
			GMStatus[i].cts = 0;
			if (!moxaChkPort[i]) {
				continue;
			} else {
				status = MoxaPortLineStatus(moxaChannels[i].port);
				if (status & 1)
					GMStatus[i].cts = 1;
				if (status & 2)
					GMStatus[i].dsr = 1;
				if (status & 4)
					GMStatus[i].dcd = 1;
			}

			if (!moxaChannels[i].tty || !moxaChannels[i].tty->termios)
				GMStatus[i].cflag = moxaChannels[i].cflag;
			else
				GMStatus[i].cflag = moxaChannels[i].tty->termios->c_cflag;
		}
		if(copy_to_user(argp, GMStatus, sizeof(struct mxser_mstatus) * MAX_PORTS))
			return -EFAULT;
		return 0;
	default:
		return (-ENOIOCTLCMD);
	case MOXA_LOAD_BIOS:
	case MOXA_FIND_BOARD:
	case MOXA_LOAD_C320B:
	case MOXA_LOAD_CODE:
		break;
	}

	if(copy_from_user(&dltmp, argp, sizeof(struct dl_str)))
		return -EFAULT;
	if(dltmp.cardno < 0 || dltmp.cardno >= MAX_BOARDS)
		return -EINVAL;

	switch(cmd)
	{
	case MOXA_LOAD_BIOS:
		i = moxaloadbios(dltmp.cardno, dltmp.buf, dltmp.len);
		return (i);
	case MOXA_FIND_BOARD:
		return moxafindcard(dltmp.cardno);
	case MOXA_LOAD_C320B:
		moxaload320b(dltmp.cardno, dltmp.buf, dltmp.len);
	default: /* to keep gcc happy */
		return (0);
	case MOXA_LOAD_CODE:
		i = moxaloadcode(dltmp.cardno, dltmp.buf, dltmp.len);
		if (i == -1)
			return (-EFAULT);
		return (i);

	}
}

int MoxaDriverPoll(void)
{
	register ushort temp;
	register int card;
	unsigned long ip, ofsAddr;
	int port, p, ports;

	if (moxaCard == 0)
		return (-1);
	for (card = 0; card < MAX_BOARDS; card++) {
		if ((ports = moxa_boards[card].numPorts) == 0)
			continue;
		if (readb(moxaIntPend[card]) == 0xff) {
			ip = moxaIntTable[card] + readb(moxaIntNdx[card]);
			p = card * MAX_PORTS_PER_BOARD;
			ports <<= 1;
			for (port = 0; port < ports; port += 2, p++) {
				if ((temp = readw(ip + port)) != 0) {
					writew(0, ip + port);
					ofsAddr = moxaTableAddr[p];
					if (temp & IntrTx)
						writew(readw(ofsAddr + HostStat) & ~WakeupTx, ofsAddr + HostStat);
					if (temp & IntrBreak) {
						moxaBreakCnt[p]++;
					}
					if (temp & IntrLine) {
						if (readb(ofsAddr + FlagStat) & DCD_state) {
							if ((moxaDCDState[p] & DCD_oldstate) == 0)
								moxaDCDState[p] = (DCD_oldstate |
										   DCD_changed);
						} else {
							if (moxaDCDState[p] & DCD_oldstate)
								moxaDCDState[p] = DCD_changed;
						}
					}
				}
			}
			writeb(0, moxaIntPend[card]);
		}
		if (moxaLowWaterChk) {
			p = card * MAX_PORTS_PER_BOARD;
			for (port = 0; port < ports; port++, p++) {
				if (moxaLowChkFlag[p]) {
					moxaLowChkFlag[p] = 0;
					ofsAddr = moxaTableAddr[p];
					low_water_check(ofsAddr);
				}
			}
		}
	}
	moxaLowWaterChk = 0;
	return (0);
}

/*****************************************************************************
 *	Card level function:						     *
 *	1. MoxaPortsOfCard(int cardno); 				     *
 *****************************************************************************/
int MoxaPortsOfCard(int cardno)
{

	if (moxa_boards[cardno].boardType == 0)
		return (0);
	return (moxa_boards[cardno].numPorts);
}

/*****************************************************************************
 *	Port level functions:						     *
 *	1.  MoxaPortIsValid(int port);					     *
 *	2.  MoxaPortEnable(int port);					     *
 *	3.  MoxaPortDisable(int port);					     *
 *	4.  MoxaPortGetMaxBaud(int port);				     *
 *	5.  MoxaPortGetCurBaud(int port);				     *
 *	6.  MoxaPortSetBaud(int port, long baud);			     *
 *	7.  MoxaPortSetMode(int port, int databit, int stopbit, int parity); *
 *	8.  MoxaPortSetTermio(int port, unsigned char *termio); 	     *
 *	9.  MoxaPortGetLineOut(int port, int *dtrState, int *rtsState);      *
 *	10. MoxaPortLineCtrl(int port, int dtrState, int rtsState);	     *
 *	11. MoxaPortFlowCtrl(int port, int rts, int cts, int rx, int tx,int xany);    *
 *	12. MoxaPortLineStatus(int port);				     *
 *	13. MoxaPortDCDChange(int port);				     *
 *	14. MoxaPortDCDON(int port);					     *
 *	15. MoxaPortFlushData(int port, int mode);	                     *
 *	16. MoxaPortWriteData(int port, unsigned char * buffer, int length); *
 *	17. MoxaPortReadData(int port, unsigned char * buffer, int length);  *
 *	18. MoxaPortTxBufSize(int port);				     *
 *	19. MoxaPortRxBufSize(int port);				     *
 *	20. MoxaPortTxQueue(int port);					     *
 *	21. MoxaPortTxFree(int port);					     *
 *	22. MoxaPortRxQueue(int port);					     *
 *	23. MoxaPortRxFree(int port);					     *
 *	24. MoxaPortTxDisable(int port);				     *
 *	25. MoxaPortTxEnable(int port); 				     *
 *	26. MoxaPortGetBrkCnt(int port);				     *
 *	27. MoxaPortResetBrkCnt(int port);				     *
 *	28. MoxaPortSetXonXoff(int port, int xonValue, int xoffValue);	     *
 *	29. MoxaPortIsTxHold(int port); 				     *
 *	30. MoxaPortSendBreak(int port, int ticks);			     *
 *****************************************************************************/
/*
 *    Moxa Port Number Description:
 *
 *      MOXA serial driver supports up to 4 MOXA-C218/C320 boards. And,
 *      the port number using in MOXA driver functions will be 0 to 31 for
 *      first MOXA board, 32 to 63 for second, 64 to 95 for third and 96
 *      to 127 for fourth. For example, if you setup three MOXA boards,
 *      first board is C218, second board is C320-16 and third board is
 *      C320-32. The port number of first board (C218 - 8 ports) is from
 *      0 to 7. The port number of second board (C320 - 16 ports) is form
 *      32 to 47. The port number of third board (C320 - 32 ports) is from
 *      64 to 95. And those port numbers form 8 to 31, 48 to 63 and 96 to
 *      127 will be invalid.
 *
 *
 *      Moxa Functions Description:
 *
 *      Function 1:     Driver initialization routine, this routine must be
 *                      called when initialized driver.
 *      Syntax:
 *      void MoxaDriverInit();
 *
 *
 *      Function 2:     Moxa driver private IOCTL command processing.
 *      Syntax:
 *      int  MoxaDriverIoctl(unsigned int cmd, unsigned long arg, int port);
 *
 *           unsigned int cmd   : IOCTL command
 *           unsigned long arg  : IOCTL argument
 *           int port           : port number (0 - 127)
 *
 *           return:    0  (OK)
 *                      -EINVAL
 *                      -ENOIOCTLCMD
 *
 *
 *      Function 3:     Moxa driver polling process routine.
 *      Syntax:
 *      int  MoxaDriverPoll(void);
 *
 *           return:    0       ; polling O.K.
 *                      -1      : no any Moxa card.             
 *
 *
 *      Function 4:     Get the ports of this card.
 *      Syntax:
 *      int  MoxaPortsOfCard(int cardno);
 *
 *           int cardno         : card number (0 - 3)
 *
 *           return:    0       : this card is invalid
 *                      8/16/24/32
 *
 *
 *      Function 5:     Check this port is valid or invalid
 *      Syntax:
 *      int  MoxaPortIsValid(int port);
 *           int port           : port number (0 - 127, ref port description)
 *
 *           return:    0       : this port is invalid
 *                      1       : this port is valid
 *
 *
 *      Function 6:     Enable this port to start Tx/Rx data.
 *      Syntax:
 *      void MoxaPortEnable(int port);
 *           int port           : port number (0 - 127)
 *
 *
 *      Function 7:     Disable this port
 *      Syntax:
 *      void MoxaPortDisable(int port);
 *           int port           : port number (0 - 127)
 *
 *
 *      Function 8:     Get the maximun available baud rate of this port.
 *      Syntax:
 *      long MoxaPortGetMaxBaud(int port);
 *           int port           : port number (0 - 127)
 *
 *           return:    0       : this port is invalid
 *                      38400/57600/115200 bps
 *
 *
 *      Function 9:     Get the current baud rate of this port.
 *      Syntax:
 *      long MoxaPortGetCurBaud(int port);
 *           int port           : port number (0 - 127)
 *
 *           return:    0       : this port is invalid
 *                      50 - 115200 bps
 *
 *
 *      Function 10:    Setting baud rate of this port.
 *      Syntax:
 *      long MoxaPortSetBaud(int port, long baud);
 *           int port           : port number (0 - 127)
 *           long baud          : baud rate (50 - 115200)
 *
 *           return:    0       : this port is invalid or baud < 50
 *                      50 - 115200 : the real baud rate set to the port, if
 *                                    the argument baud is large than maximun
 *                                    available baud rate, the real setting
 *                                    baud rate will be the maximun baud rate.
 *
 *
 *      Function 11:    Setting the data-bits/stop-bits/parity of this port
 *      Syntax:
 *      int  MoxaPortSetMode(int port, int databits, int stopbits, int parity);
 *           int port           : port number (0 - 127)
 *           int databits       : data bits (8/7/6/5)
 *           int stopbits       : stop bits (2/1/0, 0 show 1.5 stop bits)
 int parity     : parity (0:None,1:Odd,2:Even,3:Mark,4:Space)
 *
 *           return:    -1      : invalid parameter