333 lines
11 KiB
C
333 lines
11 KiB
C
/*******************************************************************************
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Copyright (C) Marvell International Ltd. and its affiliates
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This software file (the "File") is owned and distributed by Marvell
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International Ltd. and/or its affiliates ("Marvell") under the following
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alternative licensing terms. Once you have made an election to distribute the
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File under one of the following license alternatives, please (i) delete this
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introductory statement regarding license alternatives, (ii) delete the two
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license alternatives that you have not elected to use and (iii) preserve the
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Marvell copyright notice above.
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********************************************************************************
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Marvell Commercial License Option
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If you received this File from Marvell and you have entered into a commercial
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license agreement (a "Commercial License") with Marvell, the File is licensed
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to you under the terms of the applicable Commercial License.
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********************************************************************************
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Marvell GPL License Option
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If you received this File from Marvell, you may opt to use, redistribute and/or
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modify this File in accordance with the terms and conditions of the General
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Public License Version 2, June 1991 (the "GPL License"), a copy of which is
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available along with the File in the license.txt file or by writing to the Free
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Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 or
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on the worldwide web at http://www.gnu.org/licenses/gpl.txt.
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THE FILE IS DISTRIBUTED AS-IS, WITHOUT WARRANTY OF ANY KIND, AND THE IMPLIED
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WARRANTIES OF MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE ARE EXPRESSLY
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DISCLAIMED. The GPL License provides additional details about this warranty
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disclaimer.
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********************************************************************************
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Marvell BSD License Option
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If you received this File from Marvell, you may opt to use, redistribute and/or
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modify this File under the following licensing terms.
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Redistribution and use in source and binary forms, with or without modification,
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are permitted provided that the following conditions are met:
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* Redistributions of source code must retain the above copyright notice,
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this list of conditions and the following disclaimer.
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* Redistributions in binary form must reproduce the above copyright
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notice, this list of conditions and the following disclaimer in the
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documentation and/or other materials provided with the distribution.
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* Neither the name of Marvell nor the names of its contributors may be
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used to endorse or promote products derived from this software without
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specific prior written permission.
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THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" AND
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ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR
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ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
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(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
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LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
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ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*******************************************************************************/
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#include "mvUart.h"
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#include "mvBoardEnvLib.h"
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#include "gpp/mvGpp.h"
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/* static variables */
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static volatile MV_UART_PORT* uartBase[MV_UART_MAX_CHAN];
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static int uart_off;
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/*******************************************************************************
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* mvUartInit - Init a uart port.
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*
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* DESCRIPTION:
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* This routine Initialize one of the uarts ports (channels).
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* It initialize the baudrate, stop bit,parity bit etc.
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*
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* INPUT:
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* port - uart port number.
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* baudDivisor - baud divisior to use for the uart port.
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*
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* OUTPUT:
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* None.
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*
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* RETURN:
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* None.
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*
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*******************************************************************************/
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MV_VOID mvUartInit(MV_U32 port, MV_U32 baudDivisor, MV_UART_PORT* base)
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{
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volatile MV_UART_PORT *pUartPort;
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#if defined(MV_UART_OVER_PEX_WA) || defined(MV_UART_OVER_PCI_WA)
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uartBase[port] = pUartPort = (volatile MV_UART_PORT *)(base);
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return;
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#else
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uartBase[port] = pUartPort = (volatile MV_UART_PORT *)base;
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pUartPort->ier = 0x00;
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pUartPort->lcr = LCR_DIVL_EN; /* Access baud rate */
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pUartPort->dll = baudDivisor & 0xff; /* 9600 baud */
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pUartPort->dlm = (baudDivisor >> 8) & 0xff;
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pUartPort->lcr = LCR_8N1; /* 8 data, 1 stop, no parity */
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/* Clear & enable FIFOs */
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pUartPort->fcr = FCR_FIFO_EN | FCR_RXSR | FCR_TXSR;
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return;
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#endif
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}
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#ifdef MV78XX0
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#define UART_EXTERNAL_CONTROL_REG 0x10700
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/*******************************************************************************
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* mvUartDmaInit - Init a uart port in DMA mode.
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*
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* DESCRIPTION:
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* This routine Initialize one of the uart ports (channels) to use DMA mode
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* for transmission. It initialize the baudrate, stop bit,parity bit etc.
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* It also initializes IDMA channel 0 for UART transmission.
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* Once DMA based UART is configured IDMA channel 0 must not be used elsewhere.
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*
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* INPUT:
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* port - uart port number.
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* baudDivisor - baud divisior to use for the uart port.
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* idmaWinNum - The IDMA BAR to use for UART transfer (must be 1-3)
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* srcBurstSize - the IDMA source burst size (8,16,32,64,128)
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*
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* OUTPUT:
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* None.
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*
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* RETURN:
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* None.
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*
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*******************************************************************************/
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MV_VOID mvUartDmaInit(MV_U32 port, MV_U32 baudDivisor, MV_UART_PORT* base,
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MV_U32 idmaWinNum, MV_U32 srcBurstSize)
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{
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volatile MV_UART_PORT *pUartPort;
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MV_U32 srcBurstLim;
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/*set the UART channel to use the IDMA*/
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MV_REG_BIT_SET(UART_EXTERNAL_CONTROL_REG, BIT0 | (BIT8 << port));
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uartBase[port] = pUartPort = (volatile MV_UART_PORT *)base;
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mvUartInit(port, baudDivisor, base);
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pUartPort->mcr = MCR_AFCE; /* Enable Auto flow control */
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/* Set IDMA BAR target to UART*/
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MV_REG_BIT_RESET(IDMA_BASE_ADDR_REG(idmaWinNum), 0xffff);
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MV_REG_BIT_SET(IDMA_BASE_ADDR_REG(idmaWinNum), 0x0101); /*Set BAR to UART*/
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/* Set IDMA0 channel to UART mode*/
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switch (srcBurstSize)
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{
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case 8:
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srcBurstLim = ICCLR_SRC_BURST_LIM_8BYTE;
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break;
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case 16:
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srcBurstLim = ICCLR_SRC_BURST_LIM_16BYTE;
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break;
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case 32:
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srcBurstLim = ICCLR_SRC_BURST_LIM_32BYTE;
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break;
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case 64:
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srcBurstLim = ICCLR_SRC_BURST_LIM_64BYTE;
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break;
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case 128:
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srcBurstLim = ICCLR_SRC_BURST_LIM_128BYTE;
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break;
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default:
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mvOsPrintf("mvUartDmaInit:ERR. Illegal source burst limit, \
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setting to 128B default\n");
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srcBurstLim = ICCLR_SRC_BURST_LIM_128BYTE;
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break;
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}
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mvDmaCtrlLowSet(0, 0x18220 | srcBurstLim); /*channel control low according FS*/
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mvDmaOverrideSet(0, idmaWinNum, DMA_DST_ADDR);
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return;
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}
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/*******************************************************************************
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* mvUartDmaTransmit - Transmit a buffer over the UART using the IDMA.
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*
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* DESCRIPTION:
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* This routine transmits a buffer over the UART port using IDMA0.
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*
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* INPUT:
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* port - uart port number.
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* byteCount - The total number of bytes to be transferred to the UART.
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* srcAddr - The source address of the buffer to be transferred.
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*
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* OUTPUT:
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* None.
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*
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* RETURN:
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* MV_OK.
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*
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*******************************************************************************/
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MV_STATUS mvUartDmaTransmit(MV_U32 port, MV_U32 byteCount, MV_U32 srcAddr)
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{
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MV_U32 dstAddr, tmp;
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/* Verify IDMA 0 is not busy */
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if(mvDmaStateGet(port) != MV_IDLE)
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{
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mvOsPrintf("mvUartDmaTransmit: ERR. IDMA 0 busy.\n");
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return MV_ERROR;
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}
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/* Verify byte count is legal, and choose either 64K mode or 16M mode */
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if(byteCount >= 0x1000000)
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{
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mvOsPrintf("mvUartDmaTransmit: ERR. Illegal Byte count.\n");
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return MV_ERROR;
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}
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else if (byteCount >= 0x10000)
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{
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byteCount |= BIT31;
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MV_REG_BIT_SET(IDMA_CTRL_LOW_REG(0), BIT31);
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}
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else
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MV_REG_BIT_RESET(IDMA_CTRL_LOW_REG(0), BIT31);
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/* Calculate UART destination address from assigned BAR*/
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tmp = MV_REG_READ(IDMA_CTRL_LOW_REG(0));
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tmp = (tmp >> 23) & 0x3; /* Extract the destination override window number*/
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/* Check that destination BAR is configured and calculate destination address*/
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if((MV_REG_READ(IDMA_BASE_ADDR_REG(tmp)) & 0xffff) != 0x0101)
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{
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mvOsPrintf("mvUartDmaTransmit: ERR. IDMA UART BAR isn't configured.\n");
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return MV_ERROR;
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}
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else
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dstAddr = (MV_REG_READ(IDMA_BASE_ADDR_REG(tmp)) & 0xffff0000) | (port << 8);
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/* Start transfer */
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if(mvDmaTransfer(0, srcAddr, dstAddr, byteCount, 0x0) == MV_OK)
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return MV_OK;
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else
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return MV_ERROR;
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}
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#endif // MV78XX0
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/*******************************************************************************
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* mvUartPutc - Send char to the uart port.
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*
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* DESCRIPTION:
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* This routine puts one charachetr on one of the uart ports.
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*
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* INPUT:
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* port - uart port number.
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* c - character.
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*
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* OUTPUT:
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* None.
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*
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* RETURN:
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* None.
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*
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*******************************************************************************/
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MV_VOID mvUartPutc(MV_U32 port, MV_U8 c)
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{
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volatile MV_UART_PORT *pUartPort = uartBase[port];
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#if defined(CONFIG_BUFFALO_PLATFORM)
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if (uart_off && port == 0)
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return;
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#endif
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while ((pUartPort->lsr & LSR_THRE) == 0) ;
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pUartPort->thr = c;
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return;
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}
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/*******************************************************************************
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* mvUartGetc - Get char from uart port.
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*
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* DESCRIPTION:
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* This routine gets one charachetr from one of the uart ports.
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*
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* INPUT:
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* port - uart port number.
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*
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* OUTPUT:
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* None.
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*
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* RETURN:
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* carachter from the uart port.
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*
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*******************************************************************************/
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MV_U8 mvUartGetc(MV_U32 port)
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{
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volatile MV_UART_PORT *pUartPort = uartBase[port];
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#if defined(CONFIG_BUFFALO_PLATFORM)
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if (uart_off && port == 0)
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return 0;
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#endif
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while ((pUartPort->lsr & LSR_DR) == 0) ;
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return (pUartPort->rbr);
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}
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/*******************************************************************************
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* mvUartTstc - test for char in uart port.
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*
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* DESCRIPTION:
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* This routine heck if a charachter is ready to be read from one of the
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* the uart ports.
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*
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* INPUT:
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* port - uart port number.
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*
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* OUTPUT:
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* None.
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*
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* RETURN:
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* None.
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*
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*******************************************************************************/
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MV_BOOL mvUartTstc(MV_U32 port)
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{
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volatile MV_UART_PORT *pUartPort = uartBase[port];
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return ((pUartPort->lsr & LSR_DR) != 0);
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}
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