1 // SPDX-License-Identifier: GPL-2.0+ 2 /* 3 * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc. 4 * All rights reserved. 5 * 6 * File: srom.c 7 * 8 * Purpose:Implement functions to access eeprom 9 * 10 * Author: Jerry Chen 11 * 12 * Date: Jan 29, 2003 13 * 14 * Functions: 15 * SROMbyReadEmbedded - Embedded read eeprom via MAC 16 * SROMbWriteEmbedded - Embedded write eeprom via MAC 17 * SROMvRegBitsOn - Set Bits On in eeprom 18 * SROMvRegBitsOff - Clear Bits Off in eeprom 19 * SROMbIsRegBitsOn - Test if Bits On in eeprom 20 * SROMbIsRegBitsOff - Test if Bits Off in eeprom 21 * SROMvReadAllContents - Read all contents in eeprom 22 * SROMvWriteAllContents - Write all contents in eeprom 23 * SROMvReadEtherAddress - Read Ethernet Address in eeprom 24 * SROMvWriteEtherAddress - Write Ethernet Address in eeprom 25 * SROMvReadSubSysVenId - Read Sub_VID and Sub_SysId in eeprom 26 * SROMbAutoLoad - Auto Load eeprom to MAC register 27 * 28 * Revision History: 29 * 30 */ 31 32 #include "upc.h" 33 #include "tmacro.h" 34 #include "mac.h" 35 #include "srom.h" 36 37 /*--------------------- Static Definitions -------------------------*/ 38 39 /*--------------------- Static Classes ----------------------------*/ 40 41 /*--------------------- Static Variables --------------------------*/ 42 43 /*--------------------- Static Functions --------------------------*/ 44 45 /*--------------------- Export Variables --------------------------*/ 46 47 /*--------------------- Export Functions --------------------------*/ 48 49 /* 50 * Description: Read a byte from EEPROM, by MAC I2C 51 * 52 * Parameters: 53 * In: 54 * iobase - I/O base address 55 * byContntOffset - address of EEPROM 56 * Out: 57 * none 58 * 59 * Return Value: data read 60 * 61 */ 62 unsigned char SROMbyReadEmbedded(void __iomem *iobase, 63 unsigned char byContntOffset) 64 { 65 unsigned short wDelay, wNoACK; 66 unsigned char byWait; 67 unsigned char byData; 68 unsigned char byOrg; 69 70 byData = 0xFF; 71 VNSvInPortB(iobase + MAC_REG_I2MCFG, &byOrg); 72 /* turn off hardware retry for getting NACK */ 73 VNSvOutPortB(iobase + MAC_REG_I2MCFG, (byOrg & (~I2MCFG_NORETRY))); 74 for (wNoACK = 0; wNoACK < W_MAX_I2CRETRY; wNoACK++) { 75 VNSvOutPortB(iobase + MAC_REG_I2MTGID, EEP_I2C_DEV_ID); 76 VNSvOutPortB(iobase + MAC_REG_I2MTGAD, byContntOffset); 77 78 /* issue read command */ 79 VNSvOutPortB(iobase + MAC_REG_I2MCSR, I2MCSR_EEMR); 80 /* wait DONE be set */ 81 for (wDelay = 0; wDelay < W_MAX_TIMEOUT; wDelay++) { 82 VNSvInPortB(iobase + MAC_REG_I2MCSR, &byWait); 83 if (byWait & (I2MCSR_DONE | I2MCSR_NACK)) 84 break; 85 PCAvDelayByIO(CB_DELAY_LOOP_WAIT); 86 } 87 if ((wDelay < W_MAX_TIMEOUT) && 88 (!(byWait & I2MCSR_NACK))) { 89 break; 90 } 91 } 92 VNSvInPortB(iobase + MAC_REG_I2MDIPT, &byData); 93 VNSvOutPortB(iobase + MAC_REG_I2MCFG, byOrg); 94 return byData; 95 } 96 97 /* 98 * Description: Read all contents of eeprom to buffer 99 * 100 * Parameters: 101 * In: 102 * iobase - I/O base address 103 * Out: 104 * pbyEepromRegs - EEPROM content Buffer 105 * 106 * Return Value: none 107 * 108 */ 109 void SROMvReadAllContents(void __iomem *iobase, unsigned char *pbyEepromRegs) 110 { 111 int ii; 112 113 /* ii = Rom Address */ 114 for (ii = 0; ii < EEP_MAX_CONTEXT_SIZE; ii++) { 115 *pbyEepromRegs = SROMbyReadEmbedded(iobase, 116 (unsigned char)ii); 117 pbyEepromRegs++; 118 } 119 } 120 121 /* 122 * Description: Read Ethernet Address from eeprom to buffer 123 * 124 * Parameters: 125 * In: 126 * iobase - I/O base address 127 * Out: 128 * pbyEtherAddress - Ethernet Address buffer 129 * 130 * Return Value: none 131 * 132 */ 133 void SROMvReadEtherAddress(void __iomem *iobase, 134 unsigned char *pbyEtherAddress) 135 { 136 unsigned char ii; 137 138 /* ii = Rom Address */ 139 for (ii = 0; ii < ETH_ALEN; ii++) { 140 *pbyEtherAddress = SROMbyReadEmbedded(iobase, ii); 141 pbyEtherAddress++; 142 } 143 } 144