netup-eeprom.c

 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
18int 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) {
45		pr_err("eeprom i2c read error, status=%d\n", ret);
46		return -1;
47	}
48
49	return buf[1];
50};
51
52void netup_get_card_info(struct i2c_adapter *i2c_adap,
53				struct netup_card_info *cinfo)
54{
55	int i, j;
56
57	cinfo->rev =  netup_eeprom_read(i2c_adap, 63);
58
59	for (i = 64, j = 0; i < 70; i++, j++)
60		cinfo->port[0].mac[j] =  netup_eeprom_read(i2c_adap, i);
61
62	for (i = 70, j = 0; i < 76; i++, j++)
63		cinfo->port[1].mac[j] =  netup_eeprom_read(i2c_adap, i);
64};