1*4882a593Smuzhiyun // SPDX-License-Identifier: GPL-2.0-or-later
2*4882a593Smuzhiyun
3*4882a593Smuzhiyun /*
4*4882a593Smuzhiyun * netup-eeprom.c
5*4882a593Smuzhiyun *
6*4882a593Smuzhiyun * 24LC02 EEPROM driver in conjunction with NetUP Dual DVB-S2 CI card
7*4882a593Smuzhiyun *
8*4882a593Smuzhiyun * Copyright (C) 2009 NetUP Inc.
9*4882a593Smuzhiyun * Copyright (C) 2009 Abylay Ospan <aospan@netup.ru>
10*4882a593Smuzhiyun */
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun #
13*4882a593Smuzhiyun #include "cx23885.h"
14*4882a593Smuzhiyun #include "netup-eeprom.h"
15*4882a593Smuzhiyun
16*4882a593Smuzhiyun #define EEPROM_I2C_ADDR 0x50
17*4882a593Smuzhiyun
netup_eeprom_read(struct i2c_adapter * i2c_adap,u8 addr)18*4882a593Smuzhiyun int netup_eeprom_read(struct i2c_adapter *i2c_adap, u8 addr)
19*4882a593Smuzhiyun {
20*4882a593Smuzhiyun int ret;
21*4882a593Smuzhiyun unsigned char buf[2];
22*4882a593Smuzhiyun
23*4882a593Smuzhiyun /* Read from EEPROM */
24*4882a593Smuzhiyun struct i2c_msg msg[] = {
25*4882a593Smuzhiyun {
26*4882a593Smuzhiyun .addr = EEPROM_I2C_ADDR,
27*4882a593Smuzhiyun .flags = 0,
28*4882a593Smuzhiyun .buf = &buf[0],
29*4882a593Smuzhiyun .len = 1
30*4882a593Smuzhiyun }, {
31*4882a593Smuzhiyun .addr = EEPROM_I2C_ADDR,
32*4882a593Smuzhiyun .flags = I2C_M_RD,
33*4882a593Smuzhiyun .buf = &buf[1],
34*4882a593Smuzhiyun .len = 1
35*4882a593Smuzhiyun }
36*4882a593Smuzhiyun
37*4882a593Smuzhiyun };
38*4882a593Smuzhiyun
39*4882a593Smuzhiyun buf[0] = addr;
40*4882a593Smuzhiyun buf[1] = 0x0;
41*4882a593Smuzhiyun
42*4882a593Smuzhiyun ret = i2c_transfer(i2c_adap, msg, 2);
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun if (ret != 2) {
45*4882a593Smuzhiyun pr_err("eeprom i2c read error, status=%d\n", ret);
46*4882a593Smuzhiyun return -1;
47*4882a593Smuzhiyun }
48*4882a593Smuzhiyun
49*4882a593Smuzhiyun return buf[1];
50*4882a593Smuzhiyun };
51*4882a593Smuzhiyun
netup_eeprom_write(struct i2c_adapter * i2c_adap,u8 addr,u8 data)52*4882a593Smuzhiyun int netup_eeprom_write(struct i2c_adapter *i2c_adap, u8 addr, u8 data)
53*4882a593Smuzhiyun {
54*4882a593Smuzhiyun int ret;
55*4882a593Smuzhiyun unsigned char bufw[2];
56*4882a593Smuzhiyun
57*4882a593Smuzhiyun /* Write into EEPROM */
58*4882a593Smuzhiyun struct i2c_msg msg[] = {
59*4882a593Smuzhiyun {
60*4882a593Smuzhiyun .addr = EEPROM_I2C_ADDR,
61*4882a593Smuzhiyun .flags = 0,
62*4882a593Smuzhiyun .buf = &bufw[0],
63*4882a593Smuzhiyun .len = 2
64*4882a593Smuzhiyun }
65*4882a593Smuzhiyun };
66*4882a593Smuzhiyun
67*4882a593Smuzhiyun bufw[0] = addr;
68*4882a593Smuzhiyun bufw[1] = data;
69*4882a593Smuzhiyun
70*4882a593Smuzhiyun ret = i2c_transfer(i2c_adap, msg, 1);
71*4882a593Smuzhiyun
72*4882a593Smuzhiyun if (ret != 1) {
73*4882a593Smuzhiyun pr_err("eeprom i2c write error, status=%d\n", ret);
74*4882a593Smuzhiyun return -1;
75*4882a593Smuzhiyun }
76*4882a593Smuzhiyun
77*4882a593Smuzhiyun mdelay(10); /* prophylactic delay, datasheet write cycle time = 5 ms */
78*4882a593Smuzhiyun return 0;
79*4882a593Smuzhiyun };
80*4882a593Smuzhiyun
netup_get_card_info(struct i2c_adapter * i2c_adap,struct netup_card_info * cinfo)81*4882a593Smuzhiyun void netup_get_card_info(struct i2c_adapter *i2c_adap,
82*4882a593Smuzhiyun struct netup_card_info *cinfo)
83*4882a593Smuzhiyun {
84*4882a593Smuzhiyun int i, j;
85*4882a593Smuzhiyun
86*4882a593Smuzhiyun cinfo->rev = netup_eeprom_read(i2c_adap, 63);
87*4882a593Smuzhiyun
88*4882a593Smuzhiyun for (i = 64, j = 0; i < 70; i++, j++)
89*4882a593Smuzhiyun cinfo->port[0].mac[j] = netup_eeprom_read(i2c_adap, i);
90*4882a593Smuzhiyun
91*4882a593Smuzhiyun for (i = 70, j = 0; i < 76; i++, j++)
92*4882a593Smuzhiyun cinfo->port[1].mac[j] = netup_eeprom_read(i2c_adap, i);
93*4882a593Smuzhiyun };
94