// SPDX-License-Identifier: GPL-2.0+
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/*
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* Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
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* All rights reserved.
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*
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* File: srom.c
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*
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* Purpose:Implement functions to access eeprom
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*
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* Author: Jerry Chen
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*
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* Date: Jan 29, 2003
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*
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* Functions:
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* SROMbyReadEmbedded - Embedded read eeprom via MAC
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* SROMbWriteEmbedded - Embedded write eeprom via MAC
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* SROMvRegBitsOn - Set Bits On in eeprom
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* SROMvRegBitsOff - Clear Bits Off in eeprom
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* SROMbIsRegBitsOn - Test if Bits On in eeprom
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* SROMbIsRegBitsOff - Test if Bits Off in eeprom
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* SROMvReadAllContents - Read all contents in eeprom
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* SROMvWriteAllContents - Write all contents in eeprom
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* SROMvReadEtherAddress - Read Ethernet Address in eeprom
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* SROMvWriteEtherAddress - Write Ethernet Address in eeprom
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* SROMvReadSubSysVenId - Read Sub_VID and Sub_SysId in eeprom
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* SROMbAutoLoad - Auto Load eeprom to MAC register
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*
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* Revision History:
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*
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*/
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#include "upc.h"
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#include "tmacro.h"
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#include "mac.h"
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#include "srom.h"
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/*--------------------- Static Definitions -------------------------*/
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/*--------------------- Static Classes ----------------------------*/
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/*--------------------- Static Variables --------------------------*/
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/*--------------------- Static Functions --------------------------*/
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/*--------------------- Export Variables --------------------------*/
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/*--------------------- Export Functions --------------------------*/
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/*
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* Description: Read a byte from EEPROM, by MAC I2C
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*
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* Parameters:
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* In:
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* iobase - I/O base address
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* byContntOffset - address of EEPROM
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* Out:
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* none
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*
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* Return Value: data read
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*
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*/
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unsigned char SROMbyReadEmbedded(void __iomem *iobase,
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unsigned char byContntOffset)
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{
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unsigned short wDelay, wNoACK;
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unsigned char byWait;
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unsigned char byData;
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unsigned char byOrg;
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byData = 0xFF;
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VNSvInPortB(iobase + MAC_REG_I2MCFG, &byOrg);
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/* turn off hardware retry for getting NACK */
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VNSvOutPortB(iobase + MAC_REG_I2MCFG, (byOrg & (~I2MCFG_NORETRY)));
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for (wNoACK = 0; wNoACK < W_MAX_I2CRETRY; wNoACK++) {
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VNSvOutPortB(iobase + MAC_REG_I2MTGID, EEP_I2C_DEV_ID);
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VNSvOutPortB(iobase + MAC_REG_I2MTGAD, byContntOffset);
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/* issue read command */
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VNSvOutPortB(iobase + MAC_REG_I2MCSR, I2MCSR_EEMR);
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/* wait DONE be set */
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for (wDelay = 0; wDelay < W_MAX_TIMEOUT; wDelay++) {
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VNSvInPortB(iobase + MAC_REG_I2MCSR, &byWait);
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if (byWait & (I2MCSR_DONE | I2MCSR_NACK))
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break;
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PCAvDelayByIO(CB_DELAY_LOOP_WAIT);
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}
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if ((wDelay < W_MAX_TIMEOUT) &&
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(!(byWait & I2MCSR_NACK))) {
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break;
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}
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}
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VNSvInPortB(iobase + MAC_REG_I2MDIPT, &byData);
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VNSvOutPortB(iobase + MAC_REG_I2MCFG, byOrg);
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return byData;
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}
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/*
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* Description: Read all contents of eeprom to buffer
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*
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* Parameters:
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* In:
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* iobase - I/O base address
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* Out:
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* pbyEepromRegs - EEPROM content Buffer
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*
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* Return Value: none
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*
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*/
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void SROMvReadAllContents(void __iomem *iobase, unsigned char *pbyEepromRegs)
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{
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int ii;
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/* ii = Rom Address */
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for (ii = 0; ii < EEP_MAX_CONTEXT_SIZE; ii++) {
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*pbyEepromRegs = SROMbyReadEmbedded(iobase,
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(unsigned char)ii);
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pbyEepromRegs++;
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}
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}
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/*
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* Description: Read Ethernet Address from eeprom to buffer
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*
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* Parameters:
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* In:
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* iobase - I/O base address
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* Out:
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* pbyEtherAddress - Ethernet Address buffer
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*
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* Return Value: none
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*
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*/
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void SROMvReadEtherAddress(void __iomem *iobase,
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unsigned char *pbyEtherAddress)
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{
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unsigned char ii;
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/* ii = Rom Address */
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for (ii = 0; ii < ETH_ALEN; ii++) {
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*pbyEtherAddress = SROMbyReadEmbedded(iobase, ii);
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pbyEtherAddress++;
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}
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}
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