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 17 #include <errno.h> 18 #include <string.h> 19 20 #include <hardware/hardware.h> 21 #include <hardware/nfc.h> 22 23 static uint8_t pn544_eedata_settings[][4] = { 24 // DIFFERENTIAL_ANTENNA 25 26 // RF Settings 27 {0x00,0x9B,0xD1,0x0D} // Tx consumption higher than 0x0D (average 50mA) 28 ,{0x00,0x9B,0xD2,0x24} // GSP setting for this threshold 29 ,{0x00,0x9B,0xD3,0x0A} // Tx consumption higher than 0x0A (average 40mA) 30 ,{0x00,0x9B,0xD4,0x22} // GSP setting for this threshold 31 ,{0x00,0x9B,0xD5,0x08} // Tx consumption higher than 0x08 (average 30mA) 32 ,{0x00,0x9B,0xD6,0x1E} // GSP setting for this threshold 33 ,{0x00,0x9B,0xDD,0x1C} // GSP setting for this threshold 34 ,{0x00,0x9B,0x84,0x13} // ANACM2 setting 35 ,{0x00,0x99,0x81,0x7F} // ANAVMID setting PCD 36 ,{0x00,0x99,0x7A,0x3E} // ANATXMODGSPON 37 ,{0x00,0x99,0x77,0xFF} // ANATXCWGSPON 38 ,{0x00,0x99,0x31,0x70} // ANAVMID setting PICC 39 ,{0x00,0x99,0x2A,0xF5} // ANATXMODGSN-TYPEB 40 #ifdef grouper 41 ,{0x00,0x99,0x29,0xF5} // ANATXMODGSN-TYPEA 42 #else 43 ,{0x00,0x99,0x29,0xFF} // ANATXMODGSN-TYPEA 44 #endif 45 // For tegra we don't override load modulation settings. 46 47 // Enable PBTF 48 ,{0x00,0x98,0x00,0x3F} // SECURE_ELEMENT_CONFIGURATION - No Secure Element 49 ,{0x00,0x9F,0x09,0x00} // SWP_PBTF_RFU 50 ,{0x00,0x9F,0x0A,0x05} // SWP_PBTF_RFLD --> RFLEVEL Detector for PBTF 51 ,{0x00,0x9E,0xD1,0xA1} // 52 53 // Change RF Level Detector ANARFLDWU 54 ,{0x00,0x99,0x23,0x00} // Default Value is 0x01 55 56 // Low-power polling 57 ,{0x00,0x9E,0x74,0xB0} // Default Value is 0x00, bits 0->2: sensitivity (0==max, 6==min), 58 // bit 3: RFU, 59 // bits 4,5 hybrid low-power: # of low-power polls per regular poll 60 // bit 6: RFU 61 // bit 7: (0 -> disabled, 1 -> enabled) 62 ,{0x00,0x9E,0x7D,0xB0} // bits 0->3: RFU, 63 // bits 4,5: # retries after low power detection 64 // 0=1 retry, 1=2 retry, 2=3 retry, 3=4 retry 65 // bit 6: RFU, 66 // bit 7: Enable or disable retry mechanism (0: disable, 1: enable) 67 ,{0x00,0x9F,0x28,0x01} // bits 0->7: # of measurements per low-power poll 68 69 // Polling Loop - Card Emulation Timeout 70 ,{0x00,0x9F,0x35,0x14} // Time for which PN544 stays in Card Emulation mode after leaving RF field 71 ,{0x00,0x9F,0x36,0x60} // Default value 0x0411 = 50 ms ---> New Value : 0x1460 = 250 ms 72 73 //LLC Timer 74 ,{0x00,0x9C,0x31,0x00} // Guard host time-out in ms (MSB) 75 ,{0x00,0x9C,0x32,0xC8} // Guard host time-out in ms (LSB) 76 ,{0x00,0x9C,0x19,0x40} // Max RX retry (PN544=>host?) 77 ,{0x00,0x9C,0x1A,0x40} // Max TX retry (PN544=>host?) 78 79 ,{0x00,0x9C,0x0C,0x00} // 80 ,{0x00,0x9C,0x0D,0x00} // 81 ,{0x00,0x9C,0x12,0x00} // 82 ,{0x00,0x9C,0x13,0x00} // 83 84 //WTX for LLCP communication 85 ,{0x00,0x98,0xA2,0x0E} // Max value: 14 (default value: 09) 86 87 //SE GPIO 88 ,{0x00, 0x98, 0x93, 0x40} 89 90 // Set NFCT ATQA 91 ,{0x00, 0x98, 0x7D, 0x02} 92 ,{0x00, 0x98, 0x7E, 0x00} 93 94 // Enable CEA detection mechanism 95 ,{0x00, 0x9F, 0xC8, 0x01} 96 // Set NFC-F poll RC=0x00 97 ,{0x00, 0x9F, 0x9A, 0x00} 98 // Setting for EMD support for ISO 14443-4 Reader 99 ,{0x00,0x9F,0x09,0x00} // 0x00 - Disable EMD support, 0x01 - Enable EMD support 100 }; 101 102 static int pn544_close(hw_device_t *dev) { 103 free(dev); 104 105 return 0; 106 } 107 108 /* 109 * Generic device handling 110 */ 111 112 static int nfc_open(const hw_module_t* module, const char* name, 113 hw_device_t** device) { 114 if (strcmp(name, NFC_PN544_CONTROLLER) == 0) { 115 nfc_pn544_device_t *dev = calloc(1, sizeof(nfc_pn544_device_t)); 116 117 dev->common.tag = HARDWARE_DEVICE_TAG; 118 dev->common.version = 0; 119 dev->common.module = (struct hw_module_t*) module; 120 dev->common.close = pn544_close; 121 122 dev->num_eeprom_settings = sizeof(pn544_eedata_settings) / 4; 123 dev->eeprom_settings = (uint8_t*)pn544_eedata_settings; 124 dev->linktype = PN544_LINK_TYPE_I2C; 125 dev->device_node = "/dev/pn544"; 126 dev->enable_i2c_workaround = 1; 127 dev->i2c_device_address = 0x51; 128 *device = (hw_device_t*) dev; 129 return 0; 130 } else { 131 return -EINVAL; 132 } 133 } 134 135 static struct hw_module_methods_t nfc_module_methods = { 136 .open = nfc_open, 137 }; 138 139 struct nfc_module_t HAL_MODULE_INFO_SYM = { 140 .common = { 141 .tag = HARDWARE_MODULE_TAG, 142 .version_major = 1, 143 .version_minor = 0, 144 .id = NFC_HARDWARE_MODULE_ID, 145 .name = "Tegra NFC HW HAL", 146 .author = "The Android Open Source Project", 147 .methods = &nfc_module_methods, 148 }, 149 }; 150
