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