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1// SPDX-License-Identifier: GPL-2.0-or-later2 3/*4 * netup-eeprom.c5 *6 * 24LC02 EEPROM driver in conjunction with NetUP Dual DVB-S2 CI card7 *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 0x5017 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 = 130 }, {31 .addr = EEPROM_I2C_ADDR,32 .flags = I2C_M_RD,33 .buf = &buf[1],34 .len = 135 }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 52int 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 = 264 }65 };66 67 bufw[0] = addr;68 bufw[1] = data;69 70 ret = i2c_transfer(i2c_adap, msg, 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 81void 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, 63);87 88 for (i = 64, j = 0; i < 70; i++, j++)89 cinfo->port[0].mac[j] = netup_eeprom_read(i2c_adap, i);90 91 for (i = 70, j = 0; i < 76; i++, j++)92 cinfo->port[1].mac[j] = netup_eeprom_read(i2c_adap, i);93};94