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b45c0551 AO |
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 | * You should have received a copy of the GNU General Public License | |
22 | * along with this program; if not, write to the Free Software | |
23 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
24 | */ | |
25 | ||
26 | # | |
27 | #include "cx23885.h" | |
28 | #include "netup-eeprom.h" | |
29 | ||
30 | #define EEPROM_I2C_ADDR 0x50 | |
31 | ||
32 | int netup_eeprom_read(struct i2c_adapter *i2c_adap, u8 addr) | |
33 | { | |
34 | int ret; | |
35 | unsigned char buf[2]; | |
36 | ||
37 | /* Read from EEPROM */ | |
38 | struct i2c_msg msg[] = { | |
39 | { | |
40 | .addr = EEPROM_I2C_ADDR, | |
41 | .flags = 0, | |
42 | .buf = &buf[0], | |
43 | .len = 1 | |
44 | }, { | |
45 | .addr = EEPROM_I2C_ADDR, | |
46 | .flags = I2C_M_RD, | |
47 | .buf = &buf[1], | |
48 | .len = 1 | |
49 | } | |
50 | ||
51 | }; | |
52 | ||
53 | buf[0] = addr; | |
54 | buf[1] = 0x0; | |
55 | ||
56 | ret = i2c_transfer(i2c_adap, msg, 2); | |
57 | ||
58 | if (ret != 2) { | |
59 | printk(KERN_ERR "eeprom i2c read error, status=%d\n", ret); | |
60 | return -1; | |
61 | } | |
62 | ||
63 | return buf[1]; | |
64 | }; | |
65 | ||
66 | int netup_eeprom_write(struct i2c_adapter *i2c_adap, u8 addr, u8 data) | |
67 | { | |
68 | int ret; | |
69 | unsigned char bufw[2]; | |
70 | ||
71 | /* Write into EEPROM */ | |
72 | struct i2c_msg msg[] = { | |
73 | { | |
74 | .addr = EEPROM_I2C_ADDR, | |
75 | .flags = 0, | |
76 | .buf = &bufw[0], | |
77 | .len = 2 | |
78 | } | |
79 | }; | |
80 | ||
81 | bufw[0] = addr; | |
82 | bufw[1] = data; | |
83 | ||
84 | ret = i2c_transfer(i2c_adap, msg, 1); | |
85 | ||
86 | if (ret != 1) { | |
87 | printk(KERN_ERR "eeprom i2c write error, status=%d\n", ret); | |
88 | return -1; | |
89 | } | |
90 | ||
91 | mdelay(10); /* prophylactic delay, datasheet write cycle time = 5 ms */ | |
92 | return 0; | |
93 | }; | |
94 | ||
95 | void netup_get_card_info(struct i2c_adapter *i2c_adap, | |
96 | struct netup_card_info *cinfo) | |
97 | { | |
98 | int i, j; | |
99 | ||
2034188a | 100 | cinfo->rev = netup_eeprom_read(i2c_adap, 63); |
b45c0551 | 101 | |
2034188a | 102 | for (i = 64, j = 0; i < 70; i++, j++) |
b45c0551 AO |
103 | cinfo->port[0].mac[j] = netup_eeprom_read(i2c_adap, i); |
104 | ||
2034188a | 105 | for (i = 70, j = 0; i < 76; i++, j++) |
b45c0551 AO |
106 | cinfo->port[1].mac[j] = netup_eeprom_read(i2c_adap, i); |
107 | }; |