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