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c942fddf | 1 | // SPDX-License-Identifier: GPL-2.0-or-later |
b45c0551 AO |
2 | |
3 | /* | |
4 | * netup-eeprom.c | |
5 | * | |
6 | * 24LC02 EEPROM driver in conjunction with NetUP Dual DVB-S2 CI card | |
7 | * | |
8 | * Copyright (C) 2009 NetUP Inc. | |
9 | * Copyright (C) 2009 Abylay Ospan <aospan@netup.ru> | |
b45c0551 AO |
10 | */ |
11 | ||
12 | # | |
13 | #include "cx23885.h" | |
14 | #include "netup-eeprom.h" | |
15 | ||
16 | #define EEPROM_I2C_ADDR 0x50 | |
17 | ||
18 | int netup_eeprom_read(struct i2c_adapter *i2c_adap, u8 addr) | |
19 | { | |
20 | int ret; | |
21 | unsigned char buf[2]; | |
22 | ||
23 | /* Read from EEPROM */ | |
24 | struct i2c_msg msg[] = { | |
25 | { | |
26 | .addr = EEPROM_I2C_ADDR, | |
27 | .flags = 0, | |
28 | .buf = &buf[0], | |
29 | .len = 1 | |
30 | }, { | |
31 | .addr = EEPROM_I2C_ADDR, | |
32 | .flags = I2C_M_RD, | |
33 | .buf = &buf[1], | |
34 | .len = 1 | |
35 | } | |
36 | ||
37 | }; | |
38 | ||
39 | buf[0] = addr; | |
40 | buf[1] = 0x0; | |
41 | ||
42 | ret = i2c_transfer(i2c_adap, msg, 2); | |
43 | ||
44 | if (ret != 2) { | |
e39682b5 | 45 | pr_err("eeprom i2c read error, status=%d\n", ret); |
b45c0551 AO |
46 | return -1; |
47 | } | |
48 | ||
49 | return buf[1]; | |
50 | }; | |
51 | ||
52 | int netup_eeprom_write(struct i2c_adapter *i2c_adap, u8 addr, u8 data) | |
53 | { | |
54 | int ret; | |
55 | unsigned char bufw[2]; | |
56 | ||
57 | /* Write into EEPROM */ | |
58 | struct i2c_msg msg[] = { | |
59 | { | |
60 | .addr = EEPROM_I2C_ADDR, | |
61 | .flags = 0, | |
62 | .buf = &bufw[0], | |
63 | .len = 2 | |
64 | } | |
65 | }; | |
66 | ||
67 | bufw[0] = addr; | |
68 | bufw[1] = data; | |
69 | ||
70 | ret = i2c_transfer(i2c_adap, msg, 1); | |
71 | ||
72 | if (ret != 1) { | |
e39682b5 | 73 | pr_err("eeprom i2c write error, status=%d\n", ret); |
b45c0551 AO |
74 | return -1; |
75 | } | |
76 | ||
77 | mdelay(10); /* prophylactic delay, datasheet write cycle time = 5 ms */ | |
78 | return 0; | |
79 | }; | |
80 | ||
81 | void netup_get_card_info(struct i2c_adapter *i2c_adap, | |
82 | struct netup_card_info *cinfo) | |
83 | { | |
84 | int i, j; | |
85 | ||
2034188a | 86 | cinfo->rev = netup_eeprom_read(i2c_adap, 63); |
b45c0551 | 87 | |
2034188a | 88 | for (i = 64, j = 0; i < 70; i++, j++) |
b45c0551 AO |
89 | cinfo->port[0].mac[j] = netup_eeprom_read(i2c_adap, i); |
90 | ||
2034188a | 91 | for (i = 70, j = 0; i < 76; i++, j++) |
b45c0551 AO |
92 | cinfo->port[1].mac[j] = netup_eeprom_read(i2c_adap, i); |
93 | }; |