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 22 # 23 #include "cx23885.h" 24 #include "netup-eeprom.h" 25 26 #define EEPROM_I2C_ADDR 0x50 27 28 int netup_eeprom_read(struct i2c_adapter *i2c_adap, u8 addr) 29 { 30 int ret; 31 unsigned char buf[2]; 32 33 /* Read from EEPROM */ 34 struct i2c_msg msg[] = { 35 { 36 .addr = EEPROM_I2C_ADDR, 37 .flags = 0, 38 .buf = &buf[0], 39 .len = 1 40 }, { 41 .addr = EEPROM_I2C_ADDR, 42 .flags = I2C_M_RD, 43 .buf = &buf[1], 44 .len = 1 45 } 46 47 }; 48 49 buf[0] = addr; 50 buf[1] = 0x0; 51 52 ret = i2c_transfer(i2c_adap, msg, 2); 53 54 if (ret != 2) { 55 pr_err("eeprom i2c read error, status=%d\n", ret); 56 return -1; 57 } 58 59 return buf[1]; 60 }; 61 62 int netup_eeprom_write(struct i2c_adapter *i2c_adap, u8 addr, u8 data) 63 { 64 int ret; 65 unsigned char bufw[2]; 66 67 /* Write into EEPROM */ 68 struct i2c_msg msg[] = { 69 { 70 .addr = EEPROM_I2C_ADDR, 71 .flags = 0, 72 .buf = &bufw[0], 73 .len = 2 74 } 75 }; 76 77 bufw[0] = addr; 78 bufw[1] = data; 79 80 ret = i2c_transfer(i2c_adap, msg, 1); 81 82 if (ret != 1) { 83 pr_err("eeprom i2c write error, status=%d\n", ret); 84 return -1; 85 } 86 87 mdelay(10); /* prophylactic delay, datasheet write cycle time = 5 ms */ 88 return 0; 89 }; 90 91 void netup_get_card_info(struct i2c_adapter *i2c_adap, 92 struct netup_card_info *cinfo) 93 { 94 int i, j; 95 96 cinfo->rev = netup_eeprom_read(i2c_adap, 63); 97 98 for (i = 64, j = 0; i < 70; i++, j++) 99 cinfo->port[0].mac[j] = netup_eeprom_read(i2c_adap, i); 100 101 for (i = 70, j = 0; i < 76; i++, j++) 102 cinfo->port[1].mac[j] = netup_eeprom_read(i2c_adap, i); 103 }; 104