| 1 |
4 |
DFC |
/******************************************************************************
|
| 2 |
|
|
**
|
| 3 |
|
|
** (C) Copyright 2013 DFC Design, s.r.o., Brno, Czech Republic
|
| 4 |
|
|
** Author: Marek Kvas (m.kvas@dspfpga.com)
|
| 5 |
|
|
**
|
| 6 |
|
|
****************************************************************************
|
| 7 |
|
|
**
|
| 8 |
|
|
** This file is part of Xenia Ethernet Example project.
|
| 9 |
|
|
**
|
| 10 |
|
|
** Xenia Ethernet Example project is free software: you can
|
| 11 |
|
|
** redistribute it and/or modify it under the terms of
|
| 12 |
|
|
** the GNU Lesser General Public License as published by the Free
|
| 13 |
|
|
** Software Foundation, either version 3 of the License, or
|
| 14 |
|
|
** (at your option) any later version.
|
| 15 |
|
|
**
|
| 16 |
|
|
** Xenia Ethernet Example project is distributed in the hope that
|
| 17 |
|
|
** it will be useful, but WITHOUT ANY WARRANTY; without even
|
| 18 |
|
|
** the implied warranty of MERCHANTABILITY or FITNESS FOR A
|
| 19 |
|
|
** PARTICULAR PURPOSE. See the GNU Lesser General Public License
|
| 20 |
|
|
** for more details.
|
| 21 |
|
|
**
|
| 22 |
|
|
** You should have received a copy of the GNU Lesser General Public
|
| 23 |
|
|
** License along with Xenia Ethernet Example project. If not,
|
| 24 |
|
|
** see <http://www.gnu.org/licenses/>.
|
| 25 |
|
|
**
|
| 26 |
|
|
*******************************************************************************
|
| 27 |
|
|
**
|
| 28 |
|
|
** This is driver for MAC EEPROM chip 24AA025E48.
|
| 29 |
|
|
**
|
| 30 |
|
|
*******************************************************************************
|
| 31 |
|
|
*/
|
| 32 |
|
|
|
| 33 |
|
|
#include "iic_id_eeprom.h"
|
| 34 |
|
|
#include "iic_wrap.h"
|
| 35 |
|
|
|
| 36 |
|
|
/*
|
| 37 |
|
|
* Initialize context structure.
|
| 38 |
|
|
* No communication with memory is done here.
|
| 39 |
|
|
* Always succeeds - returns zero.
|
| 40 |
|
|
*/
|
| 41 |
|
|
int iic_id_eeprom_init(struct iic_id_eeprom_dev *dev,
|
| 42 |
|
|
struct iic_wrap_dev *iic_wrap, u8 iic_addr, int iic_op_timeout)
|
| 43 |
|
|
{
|
| 44 |
|
|
dev->iic_addr = iic_addr;
|
| 45 |
|
|
dev->iic_wrap = iic_wrap;
|
| 46 |
|
|
dev->iic_op_timeout = iic_op_timeout;
|
| 47 |
|
|
return 0;
|
| 48 |
|
|
}
|
| 49 |
|
|
|
| 50 |
|
|
|
| 51 |
|
|
/*
|
| 52 |
|
|
* Read continuous block of data to
|
| 53 |
|
|
* buffer given by user.
|
| 54 |
|
|
*
|
| 55 |
|
|
* On success, zero is returned. On error,
|
| 56 |
|
|
* negative number is returned.
|
| 57 |
|
|
*/
|
| 58 |
|
|
int iic_id_eeprom_read(struct iic_id_eeprom_dev *dev, u8 addr,
|
| 59 |
|
|
u8* data, u8 len)
|
| 60 |
|
|
{
|
| 61 |
|
|
unsigned res;
|
| 62 |
|
|
|
| 63 |
|
|
if (len > ID_EEPROM_MAX_SIZE) {
|
| 64 |
|
|
return -1;
|
| 65 |
|
|
}
|
| 66 |
|
|
|
| 67 |
|
|
/* Write command byte (address) */
|
| 68 |
|
|
res = iic_wrap_send_timeout(dev->iic_wrap, dev->iic_addr,
|
| 69 |
|
|
&addr, 1, dev->iic_op_timeout);
|
| 70 |
|
|
if (res != 0) {
|
| 71 |
|
|
return res;
|
| 72 |
|
|
}
|
| 73 |
|
|
|
| 74 |
|
|
/* Read data out */
|
| 75 |
|
|
res = iic_wrap_recv_timeout(dev->iic_wrap, dev->iic_addr, data,
|
| 76 |
|
|
len, dev->iic_op_timeout);
|
| 77 |
|
|
|
| 78 |
|
|
return res;
|
| 79 |
|
|
}
|
| 80 |
|
|
|
| 81 |
|
|
/*
|
| 82 |
|
|
* Write continuous block of data to
|
| 83 |
|
|
* buffer given by user.
|
| 84 |
|
|
*
|
| 85 |
|
|
* On success, zero is returned. On error,
|
| 86 |
|
|
* negative number is returned.
|
| 87 |
|
|
*/
|
| 88 |
|
|
int iic_id_eeprom_write(struct iic_id_eeprom_dev *dev, u8 addr, u8* data, u8 len)
|
| 89 |
|
|
{
|
| 90 |
|
|
unsigned res;
|
| 91 |
|
|
u8 buf[ID_EEPROM_MAX_SIZE + 1];
|
| 92 |
|
|
|
| 93 |
|
|
if (len > ID_EEPROM_MAX_SIZE) {
|
| 94 |
|
|
return -1;
|
| 95 |
|
|
}
|
| 96 |
|
|
|
| 97 |
|
|
buf[0] = addr;
|
| 98 |
|
|
memcpy(buf + 1, data, len);
|
| 99 |
|
|
|
| 100 |
|
|
/* Write command byte (address) and data*/
|
| 101 |
|
|
res = iic_wrap_send_timeout(dev->iic_wrap, dev->iic_addr, buf, len + 1,
|
| 102 |
|
|
dev->iic_op_timeout);
|
| 103 |
|
|
return res;
|
| 104 |
|
|
}
|
| 105 |
|
|
|
| 106 |
|
|
/*
|
| 107 |
|
|
* Read 48 bit long unique identifier to
|
| 108 |
|
|
* buffer prepared by user.
|
| 109 |
|
|
*
|
| 110 |
|
|
* On success, zero is returned. On error,
|
| 111 |
|
|
* negative number is returned.
|
| 112 |
|
|
*/
|
| 113 |
|
|
int iic_id_eeprom_getId(struct iic_id_eeprom_dev *dev, u8* id)
|
| 114 |
|
|
{
|
| 115 |
|
|
return iic_id_eeprom_read(dev, ID_ADDR, id, 6);
|
| 116 |
|
|
}
|
