1
2/*
3 * netup-eeprom.c
4 *
5 * 24LC02 EEPROM driver in conjunction with NetUP Dual DVB-S2 CI card
6 *
7 * Copyright (C) 2009 NetUP Inc.
8 * Copyright (C) 2009 Abylay Ospan <aospan@netup.ru>
9 *
10 * This program is free software; you can redistribute it and/or modify
11 * it under the terms of the GNU General Public License as published by
12 * the Free Software Foundation; either version 2 of the License, or
13 * (at your option) any later version.
14 *
15 * This program is distributed in the hope that it will be useful,
16 * but WITHOUT ANY WARRANTY; without even the implied warranty of
17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
18 *
19 * GNU General Public License for more details.
20 */
21
22#
23#include "cx23885.h"
24#include "netup-eeprom.h"
25
26#define EEPROM_I2C_ADDR 0x50
27
28int netup_eeprom_read(struct i2c_adapter *i2c_adap, u8 addr)
29{
30	int ret;
31	unsigned char buf[2];
32
33	/* Read from EEPROM */
34	struct i2c_msg msg[] = {
35		{
36			.addr	= EEPROM_I2C_ADDR,
37			.flags	= 0,
38			.buf	= &buf[0],
39			.len	= 1
40		}, {
41			.addr	= EEPROM_I2C_ADDR,
42			.flags	= I2C_M_RD,
43			.buf	= &buf[1],
44			.len	= 1
45		}
46
47	};
48
49	buf[0] = addr;
50	buf[1] = 0x0;
51
52	ret = i2c_transfer(i2c_adap, msg, 2);
53
54	if (ret != 2) {
55		printk(KERN_ERR "eeprom i2c read error, status=%d\n", ret);
56		return -1;
57	}
58
59	return buf[1];
60};
61
62int netup_eeprom_write(struct i2c_adapter *i2c_adap, u8 addr, u8 data)
63{
64	int ret;
65	unsigned char bufw[2];
66
67	/* Write into EEPROM */
68	struct i2c_msg msg[] = {
69		{
70			.addr	= EEPROM_I2C_ADDR,
71			.flags	= 0,
72			.buf	= &bufw[0],
73			.len	= 2
74		}
75	};
76
77	bufw[0] = addr;
78	bufw[1] = data;
79
80	ret = i2c_transfer(i2c_adap, msg, 1);
81
82	if (ret != 1) {
83		printk(KERN_ERR "eeprom i2c write error, status=%d\n", ret);
84		return -1;
85	}
86
87	mdelay(10); /* prophylactic delay, datasheet write cycle time = 5 ms */
88	return 0;
89};
90
91void netup_get_card_info(struct i2c_adapter *i2c_adap,
92				struct netup_card_info *cinfo)
93{
94	int i, j;
95
96	cinfo->rev =  netup_eeprom_read(i2c_adap, 63);
97
98	for (i = 64, j = 0; i < 70; i++, j++)
99		cinfo->port[0].mac[j] =  netup_eeprom_read(i2c_adap, i);
100
101	for (i = 70, j = 0; i < 76; i++, j++)
102		cinfo->port[1].mac[j] =  netup_eeprom_read(i2c_adap, i);
103};
104