1 | // SPDX-License-Identifier: GPL-2.0-or-later |
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> |
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(adap: i2c_adap, msgs: msg, num: 2); |
43 | |
44 | if (ret != 2) { |
45 | pr_err("eeprom i2c read error, status=%d\n" , ret); |
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(adap: i2c_adap, msgs: msg, num: 1); |
71 | |
72 | if (ret != 1) { |
73 | pr_err("eeprom i2c write error, status=%d\n" , ret); |
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 | |
86 | cinfo->rev = netup_eeprom_read(i2c_adap, addr: 63); |
87 | |
88 | for (i = 64, j = 0; i < 70; i++, j++) |
89 | cinfo->port[0].mac[j] = netup_eeprom_read(i2c_adap, addr: i); |
90 | |
91 | for (i = 70, j = 0; i < 76; i++, j++) |
92 | cinfo->port[1].mac[j] = netup_eeprom_read(i2c_adap, addr: i); |
93 | }; |
94 | |