1 2/* 3 * netup-eeprom.c 4 * 5 * 24LC02 EEPROM driver in conjunction with NetUP Dual DVB-S2 CI card 6 * 7 * Copyright (C) 2009 NetUP Inc. 8 * Copyright (C) 2009 Abylay Ospan <aospan@netup.ru> 9 * 10 * This program is free software; you can redistribute it and/or modify 11 * it under the terms of the GNU General Public License as published by 12 * the Free Software Foundation; either version 2 of the License, or 13 * (at your option) any later version. 14 * 15 * This program is distributed in the hope that it will be useful, 16 * but WITHOUT ANY WARRANTY; without even the implied warranty of 17 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 18 * 19 * GNU General Public License for more details. 20 * 21 * You should have received a copy of the GNU General Public License 22 * along with this program; if not, write to the Free Software 23 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. 24 */ 25 26# 27#include "cx23885.h" 28#include "netup-eeprom.h" 29 30#define EEPROM_I2C_ADDR 0x50 31 32int netup_eeprom_read(struct i2c_adapter *i2c_adap, u8 addr) 33{ 34 int ret; 35 unsigned char buf[2]; 36 37 /* Read from EEPROM */ 38 struct i2c_msg msg[] = { 39 { 40 .addr = EEPROM_I2C_ADDR, 41 .flags = 0, 42 .buf = &buf[0], 43 .len = 1 44 }, { 45 .addr = EEPROM_I2C_ADDR, 46 .flags = I2C_M_RD, 47 .buf = &buf[1], 48 .len = 1 49 } 50 51 }; 52 53 buf[0] = addr; 54 buf[1] = 0x0; 55 56 ret = i2c_transfer(i2c_adap, msg, 2); 57 58 if (ret != 2) { 59 printk(KERN_ERR "eeprom i2c read error, status=%d\n", ret); 60 return -1; 61 } 62 63 return buf[1]; 64}; 65 66int netup_eeprom_write(struct i2c_adapter *i2c_adap, u8 addr, u8 data) 67{ 68 int ret; 69 unsigned char bufw[2]; 70 71 /* Write into EEPROM */ 72 struct i2c_msg msg[] = { 73 { 74 .addr = EEPROM_I2C_ADDR, 75 .flags = 0, 76 .buf = &bufw[0], 77 .len = 2 78 } 79 }; 80 81 bufw[0] = addr; 82 bufw[1] = data; 83 84 ret = i2c_transfer(i2c_adap, msg, 1); 85 86 if (ret != 1) { 87 printk(KERN_ERR "eeprom i2c write error, status=%d\n", ret); 88 return -1; 89 } 90 91 mdelay(10); /* prophylactic delay, datasheet write cycle time = 5 ms */ 92 return 0; 93}; 94 95void netup_get_card_info(struct i2c_adapter *i2c_adap, 96 struct netup_card_info *cinfo) 97{ 98 int i, j; 99 100 cinfo->rev = netup_eeprom_read(i2c_adap, 63); 101 102 for (i = 64, j = 0; i < 70; i++, j++) 103 cinfo->port[0].mac[j] = netup_eeprom_read(i2c_adap, i); 104 105 for (i = 70, j = 0; i < 76; i++, j++) 106 cinfo->port[1].mac[j] = netup_eeprom_read(i2c_adap, i); 107}; 108