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134 lines
4.6 KiB
134 lines
4.6 KiB
/*
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* Copyright (C) 2011 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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#include <errno.h>
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#include <string.h>
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#include <hardware/hardware.h>
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#include <hardware/nfc.h>
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static uint8_t pn544_eedata_settings[][4] = {
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// DIFFERENTIAL_ANTENNA
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// RF Settings
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{0x00,0x9B,0xD1,0x0D} // Tx consumption higher than 0x0D (average 50mA)
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,{0x00,0x9B,0xD2,0x24} // GSP setting for this threshold
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,{0x00,0x9B,0xD3,0x0A} // Tx consumption higher than 0x0A (average 40mA)
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,{0x00,0x9B,0xD4,0x22} // GSP setting for this threshold
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,{0x00,0x9B,0xD5,0x08} // Tx consumption higher than 0x08 (average 30mA)
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,{0x00,0x9B,0xD6,0x1E} // GSP setting for this threshold
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,{0x00,0x9B,0xDD,0x1C} // GSP setting for this threshold
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,{0x00,0x9B,0x84,0x13} // ANACM2 setting
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,{0x00,0x99,0x81,0x7F} // ANAVMID setting PCD
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,{0x00,0x99,0x31,0x70} // ANAVMID setting PICC
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// Enable PBTF
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,{0x00,0x98,0x00,0x3F} // SECURE_ELEMENT_CONFIGURATION - No Secure Element
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,{0x00,0x9F,0x09,0x00} // SWP_PBTF_RFU
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,{0x00,0x9F,0x0A,0x05} // SWP_PBTF_RFLD --> RFLEVEL Detector for PBTF
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,{0x00,0x9E,0xD1,0xA1} //
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// Change RF Level Detector ANARFLDWU
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,{0x00,0x99,0x23,0x00} // Default Value is 0x01
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// Low-power polling
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,{0x00,0x9E,0x74,0xB0} // Default Value is 0x00, bits 0->2: sensitivity (0==max, 6==min),
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// bit 3: RFU,
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// bits 4,5 hybrid low-power: # of low-power polls per regular poll
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// bit 6: RFU
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// bit 7: (0 -> disabled, 1 -> enabled)
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,{0x00,0x9E,0x7D,0xB0} // bits 0->3: RFU,
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// bits 4,5: # retries after low power detection
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// 0=1 retry, 1=2 retry, 2=3 retry, 3=4 retry
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// bit 6: RFU,
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// bit 7: Enable or disable retry mechanism (0: disable, 1: enable)
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,{0x00,0x9F,0x28,0x01} // bits 0->7: # of measurements per low-power poll
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//LLC Timer
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,{0x00,0x9C,0x31,0x00} // Guard host time-out in ms (MSB)
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,{0x00,0x9C,0x32,0xC8} // Guard host time-out in ms (LSB)
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,{0x00,0x9C,0x19,0x40} // Max RX retry (PN544=>host?)
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,{0x00,0x9C,0x1A,0x40} // Max TX retry (PN544=>host?)
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,{0x00,0x9C,0x0C,0x00} //
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,{0x00,0x9C,0x0D,0x00} //
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,{0x00,0x9C,0x12,0x00} //
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,{0x00,0x9C,0x13,0x00} //
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//WTX for LLCP communication
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,{0x00,0x98,0xA2,0x0E} // Max value: 14 (default value: 09)
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//SE GPIO
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,{0x00, 0x98, 0x93, 0x40}
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// Set NFCT ATQA
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,{0x00, 0x98, 0x7D, 0x02}
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,{0x00, 0x98, 0x7E, 0x00}
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// Enable CEA detection mechanism
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,{0x00, 0x9F, 0xC8, 0x01}
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// Set NFC-F poll RC=0x00
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,{0x00, 0x9F, 0x9A, 0x00}
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// Setting for EMD support for ISO 14443-4 Reader
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,{0x00,0x9F,0x09,0x00} // 0x00 - Disable EMD support, 0x01 - Enable EMD support
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};
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static int pn544_close(hw_device_t *dev) {
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free(dev);
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return 0;
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}
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/*
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* Generic device handling
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*/
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static int nfc_open(const hw_module_t* module, const char* name,
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hw_device_t** device) {
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if (strcmp(name, NFC_PN544_CONTROLLER) == 0) {
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nfc_pn544_device_t *dev = calloc(1, sizeof(nfc_pn544_device_t));
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dev->common.tag = HARDWARE_DEVICE_TAG;
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dev->common.version = 0;
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dev->common.module = (struct hw_module_t*) module;
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dev->common.close = pn544_close;
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dev->num_eeprom_settings = sizeof(pn544_eedata_settings) / 4;
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dev->eeprom_settings = (uint8_t*)pn544_eedata_settings;
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dev->linktype = PN544_LINK_TYPE_I2C;
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dev->device_node = "/dev/pn544";
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dev->enable_i2c_workaround = 1;
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*device = (hw_device_t*) dev;
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return 0;
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} else {
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return -EINVAL;
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}
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}
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static struct hw_module_methods_t nfc_module_methods = {
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.open = nfc_open,
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};
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struct nfc_module_t HAL_MODULE_INFO_SYM = {
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.common = {
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.tag = HARDWARE_MODULE_TAG,
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.version_major = 1,
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.version_minor = 0,
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.id = NFC_HARDWARE_MODULE_ID,
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.name = "Herring NFC HW HAL",
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.author = "The Android Open Source Project",
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.methods = &nfc_module_methods,
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},
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};
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