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| // SPDX-License-Identifier: GPL-2.0-or-later
|
| /*
| * netup-eeprom.c
| *
| * 24LC02 EEPROM driver in conjunction with NetUP Dual DVB-S2 CI card
| *
| * Copyright (C) 2009 NetUP Inc.
| * Copyright (C) 2009 Abylay Ospan <aospan@netup.ru>
| */
|
| #
| #include "cx23885.h"
| #include "netup-eeprom.h"
|
| #define EEPROM_I2C_ADDR 0x50
|
| int netup_eeprom_read(struct i2c_adapter *i2c_adap, u8 addr)
| {
| int ret;
| unsigned char buf[2];
|
| /* Read from EEPROM */
| struct i2c_msg msg[] = {
| {
| .addr = EEPROM_I2C_ADDR,
| .flags = 0,
| .buf = &buf[0],
| .len = 1
| }, {
| .addr = EEPROM_I2C_ADDR,
| .flags = I2C_M_RD,
| .buf = &buf[1],
| .len = 1
| }
|
| };
|
| buf[0] = addr;
| buf[1] = 0x0;
|
| ret = i2c_transfer(i2c_adap, msg, 2);
|
| if (ret != 2) {
| pr_err("eeprom i2c read error, status=%d\n", ret);
| return -1;
| }
|
| return buf[1];
| };
|
| int netup_eeprom_write(struct i2c_adapter *i2c_adap, u8 addr, u8 data)
| {
| int ret;
| unsigned char bufw[2];
|
| /* Write into EEPROM */
| struct i2c_msg msg[] = {
| {
| .addr = EEPROM_I2C_ADDR,
| .flags = 0,
| .buf = &bufw[0],
| .len = 2
| }
| };
|
| bufw[0] = addr;
| bufw[1] = data;
|
| ret = i2c_transfer(i2c_adap, msg, 1);
|
| if (ret != 1) {
| pr_err("eeprom i2c write error, status=%d\n", ret);
| return -1;
| }
|
| mdelay(10); /* prophylactic delay, datasheet write cycle time = 5 ms */
| return 0;
| };
|
| void netup_get_card_info(struct i2c_adapter *i2c_adap,
| struct netup_card_info *cinfo)
| {
| int i, j;
|
| cinfo->rev = netup_eeprom_read(i2c_adap, 63);
|
| for (i = 64, j = 0; i < 70; i++, j++)
| cinfo->port[0].mac[j] = netup_eeprom_read(i2c_adap, i);
|
| for (i = 70, j = 0; i < 76; i++, j++)
| cinfo->port[1].mac[j] = netup_eeprom_read(i2c_adap, i);
| };
|
|
