/* sysSerial.c - ARM Integrator board serial device initialization *//* Copyright 1999-2000 ARM Limited *//* Copyright 1999-2000 Wind River Systems, Inc. */#include "copyright_wrs.h"/*modification history--------------------*//*SEE ALSO:.I "ARM Integrator AP User Guide (ARM DUI 0098).".I "UART (PL010) Technical Reference Manual (ARM DDI 0139)."*//* device initialization structure */typedef struct{    UINT32	vector;    UART_S *baseAdrs;    UINT32	intLevel;	UINT32	clkdiv;} SYS_AT91_CHAN_PARAS;/* Local data structures */LOCAL SYS_AT91_CHAN_PARAS devParas[] ={	{ INT_VEC_UART0, (UART_S *)UART0_BASE_ADDR, INT_LVL_UART0, 1 },	{ INT_VEC_UART1, (UART_S *)UART1_BASE_ADDR, INT_LVL_UART1, 1 },	{ INT_VEC_UART2, (UART_S *)UART2_BASE_ADDR, INT_LVL_UART2, 1 },	{ INT_VEC_UART3, (UART_S *)UART3_BASE_ADDR, INT_LVL_UART3, 1 },};LOCAL AT91_DBGU_CHAN at91DBGUChan;LOCAL AT91_CHAN at91UartChan[ N_SIO_CHANNELS ];/* * Array of pointers to all serial channels configured in system. * See sioChanGet(). It is this array that maps channel pointers * to standard device names.  The first entry will become "/tyCo/0", * the second "/tyCo/1", and so forth. */SIO_CHAN *sysSioChans [] ={	&at91UartChan[1].sio, /* /tyCo/2 */
	&at91DBGUChan.sio,	  /* /tyCo/1 */	&at91UartChan[0].sio, /* /tyCo/0 */
    &at91UartChan[2].sio, /* /tyCo/3 */    &at91UartChan[3].sio, /* /tyCo/4 */};/* forward declarations *//******************************************************************************** sysSerialHwInit - initialize the BSP serial devices to a quiescent state** This routine initializes the BSP serial device descriptors and puts the* devices in a quiesent state.  It is called from sysHwInit() with* interrupts locked.** RETURNS: N/A** SEE ALSO: sysHwInit()*/void sysSerialHwInit (void){    int i;	at91DBGUChan.regs = (DBGU_S*)DBGU_BASE_ADDR;	at91DBGUChan.baudRate = CONSOLE_BAUD_RATE;	AT91DBGUDevInit( &at91DBGUChan );	    for (i = 0; i < N_SIO_CHANNELS; i++)	{		at91UartChan[i].regs = devParas[i].baseAdrs;		at91UartChan[i].baudRate = CONSOLE_BAUD_RATE;		at91UartChan[i].clkdiv = devParas[i].clkdiv;		/* recave and send always use same interrupt*/		at91UartChan[i].level = devParas[i].intLevel;				/*		 * Initialise driver functions, getTxChar, putRcvChar and channelMode		 * and initialise UART		 */		AT91UartDevInit (&at91UartChan[i]);	}}/******************************************************************************** sysSerialHwInit2 - connect BSP serial device interrupts** This routine connects the BSP serial device interrupts.  It is called from* sysHwInit2().  Serial device interrupts could not be connected in* sysSerialHwInit() because the kernel memory allocator was not initialized* at that point, and intConnect() may call malloc().** RETURNS: N/A** SEE ALSO: sysHwInit2()*/void sysSerialHwInit2 (void){    int i;	AT91DBGUDevInit2( &at91DBGUChan );    for (i = 0; i < N_SIO_CHANNELS; i++)	{	/*	 * Connect and enable the interrupt.	 * We would like to check the return value from this and log a message	 * if it failed. However, logLib has not been initialised yet, so we	 * cannot log a message, so there's little point in checking it.	 * URAT still in quiet state	 */		(void) intConnect ( INUM_TO_IVEC(devParas[i].vector),				   AT91UartInt, (UINT32) &at91UartChan[i] );				intEnable (devParas[i].intLevel);		AT91UartDevInit2( &at91UartChan[i] );	}}/******************************************************************************** sysSerialChanGet - get the SIO_CHAN device associated with a serial channel** This routine returns a pointer to the SIO_CHAN device associated with* a specified serial channel.  It is called by usrRoot() to obtain* pointers when creating the system serial devices '/tyCo/x'.  It is also* used by the WDB agent to locate its serial channel.** RETURNS: A pointer to the SIO_CHAN structure for the channel, or ERROR* if the channel is invalid.*/SIO_CHAN * sysSerialChanGet    (    int channel         /* serial channel */    ){    if (channel < 0 || channel >= (int)(NELEMENTS(sysSioChans)))		return (SIO_CHAN *)ERROR;    return sysSioChans[channel];}/******************************************************************************** sysSerialReset - reset the sio devices to a quiet state** Reset all devices to prevent them from generating interrupts.** This is called from sysToMonitor to shutdown the system gracefully before* transferring to the boot ROMs.** RETURNS: N/A.*/void sysSerialReset (void){    int i;		at91DBGUChan.regs ->DBGU_IDR = 0xFFFFFFFF;	at91DBGUChan.regs ->DBGU_CR = UART_CR_RESET_RECV | UART_CR_RESET_TRAN | UART_CR_RX_DIS | UART_CR_TX_DIS;    for (i = 0; i < N_SIO_CHANNELS ; i++)	{		/* disable serial interrupts */		intDisable (devParas[i].intLevel);		/*		 *	disable all interrupt source first		 */		at91UartChan[i].regs->US_IDR = 0xFFFFFFFF;		/*		 *	set all channel to quiet state.		 */		at91UartChan[i].regs->US_CR = UART_CR_RESET_RECV | UART_CR_RESET_TRAN | UART_CR_RX_DIS | UART_CR_TX_DIS;		at91UartChan[i].regs->US_MR = UART_MR_CHAR_8BIT | UART_MR_STOP_1BIT | UART_MR_PARITY_NONE					| UART_MR_CLK_USE_MCKDIV| UART_MR_TEST_NORMAL_MODE| UART_MR_UART_MODE_NORMAL;	}}