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/*******************************************************************************
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*******************************************************************************/
#include "mvCommon.h"
#include "mvOs.h"
#include "ctrlEnv/mvCtrlEnvSpec.h"
#include "mvUart.h"
/* static variables */
static volatile MV_UART_PORT * uartBase[MV_UART_MAX_CHAN]=
{
mvUartBase(0),
mvUartBase(1),
#ifdef MV88F78X60
mvUartBase(2),
mvUartBase(3)
#endif
};
/*******************************************************************************
* mvUartInit - Init a uart port.
*
* DESCRIPTION:
* This routine Initialize one of the uarts ports (channels).
* It initialize the baudrate, stop bit,parity bit etc.
*
* INPUT:
* port - uart port number.
* baudDivisor - baud divisior to use for the uart port.
*
* OUTPUT:
* None.
*
* RETURN:
* None.
*
*******************************************************************************/
MV_VOID mvUartInit(MV_U32 port, MV_U32 baudDivisor, MV_UART_PORT *base)
{
volatile MV_UART_PORT *pUartPort;
#if defined(MV_UART_OVER_PEX_WA) || defined(MV_UART_OVER_PCI_WA)
uartBase[port] = pUartPort = (volatile MV_UART_PORT *)(base);
return;
#else
uartBase[port] = pUartPort = (volatile MV_UART_PORT *)base;
pUartPort->ier = 0x00;
pUartPort->lcr = LCR_DIVL_EN; /* Access baud rate */
pUartPort->dll = baudDivisor & 0xff; /* 9600 baud */
pUartPort->dlm = (baudDivisor >> 8) & 0xff;
pUartPort->lcr = LCR_8N1; /* 8 data, 1 stop, no parity */
/* Clear & enable FIFOs */
pUartPort->fcr = FCR_FIFO_EN | FCR_RXSR | FCR_TXSR;
return;
#endif
}
#ifdef MV78XX0
#define UART_EXTERNAL_CONTROL_REG 0x10700
/*******************************************************************************
* mvUartDmaInit - Init a uart port in DMA mode.
*
* DESCRIPTION:
* This routine Initialize one of the uart ports (channels) to use DMA mode
* for transmission. It initialize the baudrate, stop bit,parity bit etc.
* It also initializes IDMA channel 0 for UART transmission.
* Once DMA based UART is configured IDMA channel 0 must not be used elsewhere.
*
* INPUT:
* port - uart port number.
* baudDivisor - baud divisior to use for the uart port.
* idmaWinNum - The IDMA BAR to use for UART transfer (must be 1-3)
* srcBurstSize - the IDMA source burst size (8,16,32,64,128)
*
* OUTPUT:
* None.
*
* RETURN:
* None.
*
*******************************************************************************/
MV_VOID mvUartDmaInit(MV_U32 port, MV_U32 baudDivisor, MV_UART_PORT *base, MV_U32 idmaWinNum, MV_U32 srcBurstSize)
{
volatile MV_UART_PORT *pUartPort;
MV_U32 srcBurstLim;
/*set the UART channel to use the IDMA */
MV_REG_BIT_SET(UART_EXTERNAL_CONTROL_REG, BIT0 | (BIT8 << port));
uartBase[port] = pUartPort = (volatile MV_UART_PORT *)base;
mvUartInit(port, baudDivisor, base);
pUartPort->mcr = MCR_AFCE; /* Enable Auto flow control */
/* Set IDMA BAR target to UART */
MV_REG_BIT_RESET(IDMA_BASE_ADDR_REG(idmaWinNum), 0xffff);
MV_REG_BIT_SET(IDMA_BASE_ADDR_REG(idmaWinNum), 0x0101); /*Set BAR to UART */
/* Set IDMA0 channel to UART mode */
switch (srcBurstSize) {
case 8:
srcBurstLim = ICCLR_SRC_BURST_LIM_8BYTE;
break;
case 16:
srcBurstLim = ICCLR_SRC_BURST_LIM_16BYTE;
break;
case 32:
srcBurstLim = ICCLR_SRC_BURST_LIM_32BYTE;
break;
case 64:
srcBurstLim = ICCLR_SRC_BURST_LIM_64BYTE;
break;
case 128:
srcBurstLim = ICCLR_SRC_BURST_LIM_128BYTE;
break;
default:
mvOsPrintf("mvUartDmaInit:ERR. Illegal source burst limit, \
setting to 128B default\n");
srcBurstLim = ICCLR_SRC_BURST_LIM_128BYTE;
break;
}
mvDmaCtrlLowSet(0, 0x18220 | srcBurstLim); /*channel control low according FS */
mvDmaOverrideSet(0, idmaWinNum, DMA_DST_ADDR);
return;
}
/*******************************************************************************
* mvUartDmaTransmit - Transmit a buffer over the UART using the IDMA.
*
* DESCRIPTION:
* This routine transmits a buffer over the UART port using IDMA0.
*
* INPUT:
* port - uart port number.
* byteCount - The total number of bytes to be transferred to the UART.
* srcAddr - The source address of the buffer to be transferred.
*
* OUTPUT:
* None.
*
* RETURN:
* MV_OK.
*
*******************************************************************************/
MV_STATUS mvUartDmaTransmit(MV_U32 port, MV_U32 byteCount, MV_U32 srcAddr)
{
MV_U32 dstAddr, tmp;
/* Verify IDMA 0 is not busy */
if (mvDmaStateGet(port) != MV_IDLE) {
mvOsPrintf("mvUartDmaTransmit: ERR. IDMA 0 busy.\n");
return MV_ERROR;
}
/* Verify byte count is legal, and choose either 64K mode or 16M mode */
if (byteCount >= 0x1000000) {
mvOsPrintf("mvUartDmaTransmit: ERR. Illegal Byte count.\n");
return MV_ERROR;
} else if (byteCount >= 0x10000) {
byteCount |= BIT31;
MV_REG_BIT_SET(IDMA_CTRL_LOW_REG(0), BIT31);
} else
MV_REG_BIT_RESET(IDMA_CTRL_LOW_REG(0), BIT31);
/* Calculate UART destination address from assigned BAR */
tmp = MV_REG_READ(IDMA_CTRL_LOW_REG(0));
tmp = (tmp >> 23) & 0x3; /* Extract the destination override window number */
/* Check that destination BAR is configured and calculate destination address */
if ((MV_REG_READ(IDMA_BASE_ADDR_REG(tmp)) & 0xffff) != 0x0101) {
mvOsPrintf("mvUartDmaTransmit: ERR. IDMA UART BAR isn't configured.\n");
return MV_ERROR;
} else
dstAddr = (MV_REG_READ(IDMA_BASE_ADDR_REG(tmp)) & 0xffff0000) | (port << 8);
/* Start transfer */
if (mvDmaTransfer(0, srcAddr, dstAddr, byteCount, 0x0) == MV_OK)
return MV_OK;
else
return MV_ERROR;
}
#endif /* MV78XX0 */
/*******************************************************************************
* mvUartPutc - Send char to the uart port.
*
* DESCRIPTION:
* This routine puts one charachetr on one of the uart ports.
*
* INPUT:
* port - uart port number.
* c - character.
*
* OUTPUT:
* None.
*
* RETURN:
* None.
*
*******************************************************************************/
MV_VOID mvUartPutc(MV_U32 port, MV_U8 c)
{
volatile MV_UART_PORT *pUartPort = uartBase[port];
while ((pUartPort->lsr & LSR_THRE) == 0)
;
pUartPort->thr = c;
return;
}
/*******************************************************************************
* mvUartGetc - Get char from uart port.
*
* DESCRIPTION:
* This routine gets one charachetr from one of the uart ports.
*
* INPUT:
* port - uart port number.
*
* OUTPUT:
* None.
*
* RETURN:
* carachter from the uart port.
*
*******************************************************************************/
MV_U8 mvUartGetc(MV_U32 port)
{
volatile MV_UART_PORT *pUartPort = uartBase[port];
while ((pUartPort->lsr & LSR_DR) == 0)
;
return (pUartPort->rbr);
}
/*******************************************************************************
* mvUartTstc - test for char in uart port.
*
* DESCRIPTION:
* This routine heck if a charachter is ready to be read from one of the
* the uart ports.
*
* INPUT:
* port - uart port number.
*
* OUTPUT:
* None.
*
* RETURN:
* None.
*
*******************************************************************************/
MV_BOOL mvUartTstc(MV_U32 port)
{
volatile MV_UART_PORT *pUartPort = uartBase[port];
return ((pUartPort->lsr & LSR_DR) != 0);
}