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