1 /*
2 * Copyright (c) 1996, 2003 VIA Networking Technologies, Inc.
3 * All rights reserved.
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License along
16 * with this program; if not, write to the Free Software Foundation, Inc.,
17 * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
18 *
19 * File: srom.c
20 *
21 * Purpose:Implement functions to access eeprom
22 *
23 * Author: Jerry Chen
24 *
25 * Date: Jan 29, 2003
26 *
27 * Functions:
28 * SROMbyReadEmbedded - Embedded read eeprom via MAC
29 * SROMbWriteEmbedded - Embedded write eeprom via MAC
30 * SROMvRegBitsOn - Set Bits On in eeprom
31 * SROMvRegBitsOff - Clear Bits Off in eeprom
32 * SROMbIsRegBitsOn - Test if Bits On in eeprom
33 * SROMbIsRegBitsOff - Test if Bits Off in eeprom
34 * SROMvReadAllContents - Read all contents in eeprom
35 * SROMvWriteAllContents - Write all contents in eeprom
36 * SROMvReadEtherAddress - Read Ethernet Address in eeprom
37 * SROMvWriteEtherAddress - Write Ethernet Address in eeprom
38 * SROMvReadSubSysVenId - Read Sub_VID and Sub_SysId in eeprom
39 * SROMbAutoLoad - Auto Load eeprom to MAC register
40 *
41 * Revision History:
42 *
43 */
44
45 #include "upc.h"
46 #include "tmacro.h"
47 #include "mac.h"
48 #include "srom.h"
49
50 /*--------------------- Static Definitions -------------------------*/
51
52 /*--------------------- Static Classes ----------------------------*/
53
54 /*--------------------- Static Variables --------------------------*/
55
56 /*--------------------- Static Functions --------------------------*/
57
58 /*--------------------- Export Variables --------------------------*/
59
60 /*--------------------- Export Functions --------------------------*/
61
62 /*
63 * Description: Read a byte from EEPROM, by MAC I2C
64 *
65 * Parameters:
66 * In:
67 * dwIoBase - I/O base address
68 * byContntOffset - address of EEPROM
69 * Out:
70 * none
71 *
72 * Return Value: data read
73 *
74 */
SROMbyReadEmbedded(void __iomem * dwIoBase,unsigned char byContntOffset)75 unsigned char SROMbyReadEmbedded(void __iomem *dwIoBase, unsigned char byContntOffset)
76 {
77 unsigned short wDelay, wNoACK;
78 unsigned char byWait;
79 unsigned char byData;
80 unsigned char byOrg;
81
82 byData = 0xFF;
83 VNSvInPortB(dwIoBase + MAC_REG_I2MCFG, &byOrg);
84 /* turn off hardware retry for getting NACK */
85 VNSvOutPortB(dwIoBase + MAC_REG_I2MCFG, (byOrg & (~I2MCFG_NORETRY)));
86 for (wNoACK = 0; wNoACK < W_MAX_I2CRETRY; wNoACK++) {
87 VNSvOutPortB(dwIoBase + MAC_REG_I2MTGID, EEP_I2C_DEV_ID);
88 VNSvOutPortB(dwIoBase + MAC_REG_I2MTGAD, byContntOffset);
89
90 /* issue read command */
91 VNSvOutPortB(dwIoBase + MAC_REG_I2MCSR, I2MCSR_EEMR);
92 /* wait DONE be set */
93 for (wDelay = 0; wDelay < W_MAX_TIMEOUT; wDelay++) {
94 VNSvInPortB(dwIoBase + MAC_REG_I2MCSR, &byWait);
95 if (byWait & (I2MCSR_DONE | I2MCSR_NACK))
96 break;
97 PCAvDelayByIO(CB_DELAY_LOOP_WAIT);
98 }
99 if ((wDelay < W_MAX_TIMEOUT) &&
100 (!(byWait & I2MCSR_NACK))) {
101 break;
102 }
103 }
104 VNSvInPortB(dwIoBase + MAC_REG_I2MDIPT, &byData);
105 VNSvOutPortB(dwIoBase + MAC_REG_I2MCFG, byOrg);
106 return byData;
107 }
108
109 /*
110 * Description: Read all contents of eeprom to buffer
111 *
112 * Parameters:
113 * In:
114 * dwIoBase - I/O base address
115 * Out:
116 * pbyEepromRegs - EEPROM content Buffer
117 *
118 * Return Value: none
119 *
120 */
SROMvReadAllContents(void __iomem * dwIoBase,unsigned char * pbyEepromRegs)121 void SROMvReadAllContents(void __iomem *dwIoBase, unsigned char *pbyEepromRegs)
122 {
123 int ii;
124
125 /* ii = Rom Address */
126 for (ii = 0; ii < EEP_MAX_CONTEXT_SIZE; ii++) {
127 *pbyEepromRegs = SROMbyReadEmbedded(dwIoBase, (unsigned char)ii);
128 pbyEepromRegs++;
129 }
130 }
131
132 /*
133 * Description: Read Ethernet Address from eeprom to buffer
134 *
135 * Parameters:
136 * In:
137 * dwIoBase - I/O base address
138 * Out:
139 * pbyEtherAddress - Ethernet Address buffer
140 *
141 * Return Value: none
142 *
143 */
SROMvReadEtherAddress(void __iomem * dwIoBase,unsigned char * pbyEtherAddress)144 void SROMvReadEtherAddress(void __iomem *dwIoBase, unsigned char *pbyEtherAddress)
145 {
146 unsigned char ii;
147
148 /* ii = Rom Address */
149 for (ii = 0; ii < ETH_ALEN; ii++) {
150 *pbyEtherAddress = SROMbyReadEmbedded(dwIoBase, ii);
151 pbyEtherAddress++;
152 }
153 }
154