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// SPDX-License-Identifier: GPL-2.0+
/*
* Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
* All rights reserved.
*
* Purpose:Implement functions to access eeprom
*
* Author: Jerry Chen
*
* Date: Jan 29, 2003
*
* Functions:
* SROMbyReadEmbedded - Embedded read eeprom via MAC
* SROMbWriteEmbedded - Embedded write eeprom via MAC
* SROMvRegBitsOn - Set Bits On in eeprom
* SROMvRegBitsOff - Clear Bits Off in eeprom
* SROMbIsRegBitsOn - Test if Bits On in eeprom
* SROMbIsRegBitsOff - Test if Bits Off in eeprom
* SROMvReadAllContents - Read all contents in eeprom
* SROMvWriteAllContents - Write all contents in eeprom
* SROMvReadEtherAddress - Read Ethernet Address in eeprom
* SROMvWriteEtherAddress - Write Ethernet Address in eeprom
* SROMvReadSubSysVenId - Read Sub_VID and Sub_SysId in eeprom
* SROMbAutoLoad - Auto Load eeprom to MAC register
*
* Revision History:
*
*/
#include "device.h"
#include "mac.h"
#include "srom.h"
/*--------------------- Static Definitions -------------------------*/
/*--------------------- Static Classes ----------------------------*/
/*--------------------- Static Variables --------------------------*/
/*--------------------- Static Functions --------------------------*/
/*--------------------- Export Variables --------------------------*/
/*--------------------- Export Functions --------------------------*/
/*
* Description: Read a byte from EEPROM, by MAC I2C
*
* Parameters:
* In:
* iobase - I/O base address
* byContntOffset - address of EEPROM
* Out:
* none
*
* Return Value: data read
*
*/
unsigned char SROMbyReadEmbedded(void __iomem *iobase,
unsigned char byContntOffset)
{
unsigned short wDelay, wNoACK;
unsigned char byWait;
unsigned char byData;
unsigned char byOrg;
byData = 0xFF;
byOrg = ioread8(iobase + MAC_REG_I2MCFG);
/* turn off hardware retry for getting NACK */
iowrite8(byOrg & (~I2MCFG_NORETRY), iobase + MAC_REG_I2MCFG);
for (wNoACK = 0; wNoACK < W_MAX_I2CRETRY; wNoACK++) {
iowrite8(EEP_I2C_DEV_ID, iobase + MAC_REG_I2MTGID);
iowrite8(byContntOffset, iobase + MAC_REG_I2MTGAD);
/* issue read command */
iowrite8(I2MCSR_EEMR, iobase + MAC_REG_I2MCSR);
/* wait DONE be set */
for (wDelay = 0; wDelay < W_MAX_TIMEOUT; wDelay++) {
byWait = ioread8(iobase + MAC_REG_I2MCSR);
if (byWait & (I2MCSR_DONE | I2MCSR_NACK))
break;
udelay(CB_DELAY_LOOP_WAIT);
}
if ((wDelay < W_MAX_TIMEOUT) &&
(!(byWait & I2MCSR_NACK))) {
break;
}
}
byData = ioread8(iobase + MAC_REG_I2MDIPT);
iowrite8(byOrg, iobase + MAC_REG_I2MCFG);
return byData;
}
/*
* Description: Read all contents of eeprom to buffer
*
* Parameters:
* In:
* iobase - I/O base address
* Out:
* pbyEepromRegs - EEPROM content Buffer
*
* Return Value: none
*
*/
void SROMvReadAllContents(void __iomem *iobase, unsigned char *pbyEepromRegs)
{
int ii;
/* ii = Rom Address */
for (ii = 0; ii < EEP_MAX_CONTEXT_SIZE; ii++) {
*pbyEepromRegs = SROMbyReadEmbedded(iobase,
(unsigned char)ii);
pbyEepromRegs++;
}
}
/*
* Description: Read Ethernet Address from eeprom to buffer
*
* Parameters:
* In:
* iobase - I/O base address
* Out:
* pbyEtherAddress - Ethernet Address buffer
*
* Return Value: none
*
*/
void SROMvReadEtherAddress(void __iomem *iobase,
unsigned char *pbyEtherAddress)
{
unsigned char ii;
/* ii = Rom Address */
for (ii = 0; ii < ETH_ALEN; ii++) {
*pbyEtherAddress = SROMbyReadEmbedded(iobase, ii);
pbyEtherAddress++;
}
}
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