moxa.c

moxa多串口卡linux下的驱动源码

#else
		retval = -EAGAIN;
#endif
		break;
	    }
		if (!(ch->asyncflags & ASYNC_CALLOUT_ACTIVE) &&
		    !(ch->asyncflags & ASYNC_CLOSING) && (do_clocal ||
						MoxaPortDCDON(ch->port)))
			break;

		if (signal_pending(current)) {
			retval = -ERESTARTSYS;
			break;
		}
	    schedule();
	}
	current->state = TASK_RUNNING;
	remove_wait_queue(&ch->open_wait, &wait);
	if (!tty_hung_up_p(filp))
	    ch->count++;
	ch->blocked_open--;
#ifdef SERIAL_DEBUG_OPEN
	printk("block_til_ready after blocking: ttys%d, count = %d\n",
	       ch->line, ch->count);
#endif
	if (retval)
		return (retval);
	ch->asyncflags |= ASYNC_NORMAL_ACTIVE;
	return (0);
}

static void setup_empty_event(struct tty_struct *tty)
{
	struct moxa_str *ch = tty->driver_data;
	unsigned long flags;

	save_flags(flags);
	cli();
	ch->statusflags |= EMPTYWAIT;
	moxaEmptyTimer_on[ch->port] = 0;
	del_timer(&moxaEmptyTimer[ch->port]);
	moxaEmptyTimer[ch->port].expires = jiffies + HZ;
	moxaEmptyTimer_on[ch->port] = 1;
	add_timer(&moxaEmptyTimer[ch->port]);
	restore_flags(flags);
}

static void check_xmit_empty(unsigned long data)
{
	struct moxa_str *ch;

	ch = (struct moxa_str *) data;
	moxaEmptyTimer_on[ch->port] = 0;
	del_timer(&moxaEmptyTimer[ch->port]);
	if (ch->tty && (ch->statusflags & EMPTYWAIT)) {
		if (MoxaPortTxQueue(ch->port) == 0) {
			ch->statusflags &= ~EMPTYWAIT;
			if ((ch->tty->flags & (1 << TTY_DO_WRITE_WAKEUP)) &&
			    ch->tty->ldisc.write_wakeup)
				(ch->tty->ldisc.write_wakeup) (ch->tty);
			wake_up_interruptible(&ch->tty->write_wait);
			return;
	    	}
	    moxaEmptyTimer[ch->port].expires = jiffies + HZ;
	    moxaEmptyTimer_on[ch->port] = 1;
	    add_timer(&moxaEmptyTimer[ch->port]);
	} else
	    ch->statusflags &= ~EMPTYWAIT;
}

static void shut_down(struct moxa_str *ch)
{
	struct tty_struct *tp;

	if (!(ch->asyncflags & ASYNC_INITIALIZED))
	    return;

	tp = ch->tty;

	MoxaPortDisable(ch->port);

	/*
	 * If we're a modem control device and HUPCL is on, drop RTS & DTR.
	 */
	if (tp->termios->c_cflag & HUPCL)
	    MoxaPortLineCtrl(ch->port, 0, 0);

	ch->asyncflags &= ~ASYNC_INITIALIZED;
}

static void receive_data(struct moxa_str *ch)
{
	struct tty_struct *tp;
	struct termios *ts;
	int i, count, rc, space;
	unsigned char *charptr, *flagptr;
	unsigned long flags;

	ts = 0;
	tp = ch->tty;
	if (tp)
	    ts = tp->termios;
	/**************************************************
	if ( !tp || !ts || !(ts->c_cflag & CREAD) ) {
	*****************************************************/
	if (!tp || !ts) {
		MoxaPortFlushData2(ch->port, 0);
		return;
	}
	space = TTY_FLIPBUF_SIZE - tp->flip.count;
	if (space <= 0)
		return;
	charptr = tp->flip.char_buf_ptr;
	flagptr = tp->flip.flag_buf_ptr;
	rc = tp->flip.count;
	save_flags(flags);
	cli();
	count = MoxaPortReadData(ch->port, charptr, space);
	restore_flags(flags);
	for (i = 0; i < count; i++)
	    *flagptr++ = 0;
	charptr += count;
	rc += count;
	tp->flip.count = rc;
	tp->flip.char_buf_ptr = charptr;
	tp->flip.flag_buf_ptr = flagptr;
	tty_schedule_flip(ch->tty);
}

#define Magic_code	0x404

/*
 *    System Configuration
 */
/*
 *    for C218 BIOS initialization
 */
#define C218_ConfBase	0x800
#define C218_status	(C218_ConfBase + 0)	/* BIOS running status    */
#define C218_diag	(C218_ConfBase + 2)	/* diagnostic status      */
#define C218_key	(C218_ConfBase + 4)	/* WORD (0x218 for C218) */
#define C218DLoad_len	(C218_ConfBase + 6)	/* WORD           */
#define C218check_sum	(C218_ConfBase + 8)	/* BYTE           */
#define C218chksum_ok	(C218_ConfBase + 0x0a)	/* BYTE (1:ok)            */

#define C218_LoadBuf	0x0F00
#define C218_KeyCode	0x218
#define CP204J_KeyCode	0x204

/*
 *    for C320 BIOS initialization
 */
#define C320_ConfBase	0x800
#define C320_LoadBuf	0x0f00
#define STS_init	0x05	/* for C320_status        */

#define C320_status	C320_ConfBase + 0	/* BIOS running status    */
#define C320_diag	C320_ConfBase + 2	/* diagnostic status      */
#define C320_key	C320_ConfBase + 4	/* WORD (0320H for C320) */
#define C320DLoad_len	C320_ConfBase + 6	/* WORD           */
#define C320check_sum	C320_ConfBase + 8	/* WORD           */
#define C320chksum_ok	C320_ConfBase + 0x0a	/* WORD (1:ok)            */
#define C320bapi_len	C320_ConfBase + 0x0c	/* WORD             */

#define C320_KeyCode	0x320

#define FixPage_addr	0x0000	/* starting addr of static page  */
#define DynPage_addr	0x2000	/* starting addr of dynamic page */
#define Control_reg	0x1ff0	/* select page and reset control */
#define HW_reset	0x80

/*
 *    Function Codes
 */
#define FC_EnableCH	2
#define FC_DisableCH	3
#define FC_SetMode	5
#define FC_LineControl	7
#define FC_FlushQueue	10
#define FC_SendBreak	11
#define FC_StopBreak	12
#define FC_SendXon	16
#define FC_SetLineIrq	20
#define FC_SetFlowCtl	21
#define FC_SetXonXoff	25
#define FC_ExtIQueue	27
#define FC_ExtOQueue	28
#define FC_ClrLineIrq	29
#define FC_SetBaud	36
#define FC_SetDataMode  41
#define FC_SetXonState	52
#define FC_SetXoffState	53
#define FC_SetRxFIFOTrig 54
#define FC_SetTxFIFOCnt 55
#define FC_UnixRate	56
#define FC_UnixResetTimer 57

#define	RxFIFOTrig1	0
#define	RxFIFOTrig4	1
#define	RxFIFOTrig8	2
#define	RxFIFOTrig14	3

/*
 *    Dual-Ported RAM
 */
#define DRAM_global	0
#define INT_data	(DRAM_global + 0)
#define Config_base	(DRAM_global + 0x108)

#define IRQindex	(INT_data + 0)
#define IRQpending	(INT_data + 4)
#define IRQtable	(INT_data + 8)

/*
 *    Interrupt Status
 */
#define IntrRx		0x01	/* receiver data O.K.             */
#define IntrTx		0x02	/* transmit buffer empty  */
#define IntrFunc	0x04	/* function complete              */
#define IntrBreak	0x08	/* received break         */
#define IntrLine	0x10	/* line status change
				   for transmitter                */
#define IntrIntr	0x20	/* received INTR code             */
#define IntrQuit	0x40	/* received QUIT code             */
#define IntrEOF 	0x80	/* received EOF code              */

#define IntrRxTrigger 	0x100	/* rx data count reach tigger value */
#define IntrTxTrigger 	0x200	/* tx data count below trigger value */

#define Magic_no	(Config_base + 0)
#define Card_model_no	(Config_base + 2)
#define Module_cnt	(Config_base + 8)
#define Module_no	(Config_base + 10)
#define Disable_IRQ	(Config_base + 20)
#define TMS320_PORT1	(Config_base + 22)
#define TMS320_PORT2	(Config_base + 24)
#define TMS320_CLOCK	(Config_base + 26)

/*
 *    DATA BUFFER in DRAM
 */
#define Extern_table	0x400	/* Base address of the external table
				   (24 words *    64) total 3K bytes
				   (24 words * 128) total 6K bytes */
#define Extern_size	0x60	/* 96 bytes                       */
#define RXrptr		0x00	/* read pointer for RX buffer     */
#define RXwptr		0x02	/* write pointer for RX buffer    */
#define TXrptr		0x04	/* read pointer for TX buffer     */
#define TXwptr		0x06	/* write pointer for TX buffer    */
#define HostStat	0x08	/* IRQ flag and general flag      */
#define FlagStat	0x0A
#define FlowControl	0x0C	/* B7 B6 B5 B4 B3 B2 B1 B0              */
					/*  x  x  x  x  |  |  |  |            */
					/*              |  |  |  + CTS flow   */
					/*              |  |  +--- RTS flow   */
					/*              |  +------ TX Xon/Xoff */
					/*              +--------- RX Xon/Xoff */
#define Break_cnt	0x0E	/* received break count   */
#define RX_mask 	0x12
#define TX_mask 	0x14
#define Ofs_rxb 	0x16
#define Ofs_txb 	0x18
#define Page_rxb	0x1A
#define Page_txb	0x1C
#define EndPage_rxb	0x1E
#define EndPage_txb	0x20
#define Data_error	0x22
#define RxTrigger	0x28
#define TxTrigger	0x2a


#define FuncCode	0x40
#define FuncArg 	0x42
#define FuncArg1	0x44

#define C218rx_size	0x2000	/* 8K bytes */
#define C218tx_size	0x8000	/* 32K bytes */

#define C218rx_mask	(C218rx_size - 1)
#define C218tx_mask	(C218tx_size - 1)

#define C320p8rx_size	0x2000
#define C320p8tx_size	0x8000
#define C320p8rx_mask	(C320p8rx_size - 1)
#define C320p8tx_mask	(C320p8tx_size - 1)

#define C320p16rx_size	0x2000
#define C320p16tx_size	0x4000
#define C320p16rx_mask	(C320p16rx_size - 1)
#define C320p16tx_mask	(C320p16tx_size - 1)

#define C320p24rx_size	0x2000
#define C320p24tx_size	0x2000
#define C320p24rx_mask	(C320p24rx_size - 1)
#define C320p24tx_mask	(C320p24tx_size - 1)

#define C320p32rx_size	0x1000
#define C320p32tx_size	0x1000
#define C320p32rx_mask	(C320p32rx_size - 1)
#define C320p32tx_mask	(C320p32tx_size - 1)

#define Page_size	0x2000
#define Page_mask	(Page_size - 1)
#define C218rx_spage	3
#define C218tx_spage	4
#define C218rx_pageno	1
#define C218tx_pageno	4
#define C218buf_pageno	5

#define C320p8rx_spage	3
#define C320p8tx_spage	4
#define C320p8rx_pgno	1
#define C320p8tx_pgno	4
#define C320p8buf_pgno	5

#define C320p16rx_spage 3
#define C320p16tx_spage 4
#define C320p16rx_pgno	1
#define C320p16tx_pgno	2
#define C320p16buf_pgno 3

#define C320p24rx_spage 3
#define C320p24tx_spage 4
#define C320p24rx_pgno	1
#define C320p24tx_pgno	1
#define C320p24buf_pgno 2

#define C320p32rx_spage 3
#define C320p32tx_ofs	C320p32rx_size
#define C320p32tx_spage 3
#define C320p32buf_pgno 1

/*
 *    Host Status
 */
#define WakeupRx	0x01
#define WakeupTx	0x02
#define WakeupBreak	0x08
#define WakeupLine	0x10
#define WakeupIntr	0x20
#define WakeupQuit	0x40
#define WakeupEOF	0x80	/* used in VTIME control */
#define WakeupRxTrigger	0x100
#define WakeupTxTrigger	0x200
/*
 *    Flag status
 */
#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
#define MX_PARMARK	0xA0	
#define MX_PARSPACE	0x20

#define LowWater	128

/*
 *    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 moxafunc2(unsigned long, int, ushort);
static void wait_finish(unsigned long);
static void wait_finish2(unsigned long);
static void low_water_check(unsigned long);
static int moxaloadbios(int, unsigned char *, int);
static int moxafindcard(int);
static int moxaload320b(int, unsigned char *, int);
static int moxaloadcode(int, unsigned char *, 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)