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 */
75unsigned 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 */
121void 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 */
144void 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