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
netup_eeprom_read(struct i2c_adapter * i2c_adap,u8 addr)28 int 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
netup_eeprom_write(struct i2c_adapter * i2c_adap,u8 addr,u8 data)62 int 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
netup_get_card_info(struct i2c_adapter * i2c_adap,struct netup_card_info * cinfo)91 void 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