1 /* 2 * Copyright (C) 2011 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 #include <errno.h> 17 #include <string.h> 18 19 #include <hardware/hardware.h> 20 #include <hardware/nfc.h> 21 22 static uint8_t pn544_eedata_settings[][4] = { 23 // DIFFERENTIAL_ANTENNA 24 25 // RF Settings 26 {0x00,0x9B,0xD1,0x0D} // Tx consumption higher than 0x0D (average 50mA) 27 ,{0x00,0x9B,0xD2,0x24} // GSP setting for this threshold 28 ,{0x00,0x9B,0xD3,0x0A} // Tx consumption higher than 0x0A (average 40mA) 29 ,{0x00,0x9B,0xD4,0x22} // GSP setting for this threshold 30 ,{0x00,0x9B,0xD5,0x08} // Tx consumption higher than 0x08 (average 30mA) 31 ,{0x00,0x9B,0xD6,0x1E} // GSP setting for this threshold 32 ,{0x00,0x9B,0xDD,0x1C} // GSP setting for this threshold 33 ,{0x00,0x9B,0x84,0x13} // ANACM2 setting 34 #ifdef maguro 35 // Maguro load modulation settings 36 ,{0x00,0x99,0x29,0xF4} // Type A load modulation amplitude fine tuning 37 ,{0x00,0x99,0x2A,0xF4} // Type B load modulation amplitude fine tuning 38 ,{0x00,0x99,0x2B,0xF4} // Type B' load modulation amplitude fine tuning 39 ,{0x00,0x99,0x85,0xF1} // Type Felica load modulation amplitude fine tuning 40 #endif 41 #ifdef toro 42 // Toro load modulation settings 43 ,{0x00,0x99,0x29,0xF3} // Type A load modulation amplitude fine tuning 44 ,{0x00,0x99,0x2A,0xF3} // Type B load modulation amplitude fine tuning 45 ,{0x00,0x99,0x2B,0xF3} // Type B' load modulation amplitude fine tuning 46 ,{0x00,0x99,0x85,0xF1} // Type Felica load modulation amplitude fine tuning 47 #endif 48 // For tuna we don't override load modulation settings. 49 50 // Enable PBTF 51 ,{0x00,0x98,0x00,0x3F} // SECURE_ELEMENT_CONFIGURATION - No Secure Element 52 ,{0x00,0x9F,0x09,0x00} // SWP_PBTF_RFU 53 ,{0x00,0x9F,0x0A,0x05} // SWP_PBTF_RFLD --> RFLEVEL Detector for PBTF 54 ,{0x00,0x9E,0xD1,0xA1} // 55 56 // Change RF Level Detector ANARFLDWU 57 ,{0x00,0x99,0x23,0x00} // Default Value is 0x01 58 59 // Low-power polling 60 ,{0x00,0x9E,0x74,0xB0} // Default Value is 0x00, bits 0->2: sensitivity (0==max, 6==min), 61 // bit 3: RFU, 62 // bits 4,5 hybrid low-power: # of low-power polls per regular poll 63 // bit 6: RFU 64 // bit 7: (0 -> disabled, 1 -> enabled) 65 ,{0x00,0x9E,0x7D,0xB0} // bits 0->3: RFU, 66 // bits 4,5: # retries after low power detection 67 // 0=1 retry, 1=2 retry, 2=3 retry, 3=4 retry 68 // bit 6: RFU, 69 // bit 7: Enable or disable retry mechanism (0: disable, 1: enable) 70 ,{0x00,0x9F,0x28,0x01} // bits 0->7: # of measurements per low-power poll 71 72 // Polling Loop - Card Emulation Timeout 73 ,{0x00,0x9F,0x35,0x14} // Time for which PN544 stays in Card Emulation mode after leaving RF field 74 ,{0x00,0x9F,0x36,0x60} // Default value 0x0411 = 50 ms ---> New Value : 0x1460 = 250 ms 75 76 //LLC Timer 77 ,{0x00,0x9C,0x31,0x00} // Guard host time-out in ms (MSB) 78 ,{0x00,0x9C,0x32,0xC8} // Guard host time-out in ms (LSB) 79 ,{0x00,0x9C,0x19,0x40} // Max RX retry (PN544=>host?) 80 ,{0x00,0x9C,0x1A,0x40} // Max TX retry (PN544=>host?) 81 82 ,{0x00,0x9C,0x0C,0x00} // 83 ,{0x00,0x9C,0x0D,0x00} // 84 ,{0x00,0x9C,0x12,0x00} // 85 ,{0x00,0x9C,0x13,0x00} // 86 87 // NFC-DEP Target Waiting Time (WT) 88 ,{0x00,0x98,0xA2,0x08} // Set to 0x08 as required by [digital] (default value: 09) 89 90 //SE GPIO 91 ,{0x00, 0x98, 0x93, 0x40} 92 93 // Set NFCT ATQA 94 ,{0x00, 0x98, 0x7D, 0x02} 95 ,{0x00, 0x98, 0x7E, 0x00} 96 97 // Enable CEA detection mechanism 98 ,{0x00, 0x9F, 0xC8, 0x01} 99 // Set NFC-F poll RC=0x00 100 ,{0x00, 0x9F, 0x9A, 0x00} 101 // Setting for EMD support for ISO 14443-4 Reader 102 ,{0x00,0x9F,0x09,0x00} // 0x00 - Disable EMD support, 0x01 - Enable EMD support 103 }; 104 105 static int pn544_close(hw_device_t *dev) { 106 free(dev); 107 108 return 0; 109 } 110 111 /* 112 * Generic device handling 113 */ 114 115 static int nfc_open(const hw_module_t* module, const char* name, 116 hw_device_t** device) { 117 if (strcmp(name, NFC_PN544_CONTROLLER) == 0) { 118 nfc_pn544_device_t *dev = calloc(1, sizeof(nfc_pn544_device_t)); 119 120 dev->common.tag = HARDWARE_DEVICE_TAG; 121 dev->common.version = 0; 122 dev->common.module = (struct hw_module_t*) module; 123 dev->common.close = pn544_close; 124 125 dev->num_eeprom_settings = sizeof(pn544_eedata_settings) / 4; 126 dev->eeprom_settings = (uint8_t*)pn544_eedata_settings; 127 dev->linktype = PN544_LINK_TYPE_UART; 128 dev->device_node = "/dev/ttyO3"; 129 dev->enable_i2c_workaround = 0; 130 *device = (hw_device_t*) dev; 131 return 0; 132 } else { 133 return -EINVAL; 134 } 135 } 136 137 static struct hw_module_methods_t nfc_module_methods = { 138 .open = nfc_open, 139 }; 140 141 struct nfc_module_t HAL_MODULE_INFO_SYM = { 142 .common = { 143 .tag = HARDWARE_MODULE_TAG, 144 .version_major = 1, 145 .version_minor = 0, 146 .id = NFC_HARDWARE_MODULE_ID, 147 .name = "Tuna NFC HW HAL", 148 .author = "The Android Open Source Project", 149 .methods = &nfc_module_methods, 150 }, 151 }; 152
