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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.
*/
#ifndef ANDROID_NFC_HAL_INTERFACE_H
#define ANDROID_NFC_HAL_INTERFACE_H
#include <stdint.h>
#include <strings.h>
#include <sys/cdefs.h>
#include <sys/types.h>
#include <hardware/hardware.h>
__BEGIN_DECLS
#define NFC_HARDWARE_MODULE_ID "nfc"
/*
* Begin PN544 specific HAL
*/
#define NFC_PN544_CONTROLLER "pn544"
typedef struct nfc_module_t {
struct hw_module_t common;
} nfc_module_t;
/*
* PN544 linktypes.
* UART
* I2C
* USB (uses UART DAL)
*/
typedef enum {
PN544_LINK_TYPE_UART,
PN544_LINK_TYPE_I2C,
PN544_LINK_TYPE_USB,
PN544_LINK_TYPE_INVALID,
} nfc_pn544_linktype;
typedef struct {
struct hw_device_t common;
/* The number of EEPROM registers to write */
uint32_t num_eeprom_settings;
/* The actual EEPROM settings
* For PN544, each EEPROM setting is a 4-byte entry,
* of the format [0x00, addr_msb, addr_lsb, value].
*/
uint8_t* eeprom_settings;
/* The link type to which the PN544 is connected */
nfc_pn544_linktype linktype;
/* The device node to which the PN544 is connected */
const char* device_node;
/* On Crespo we had an I2C issue that would cause us to sometimes read
* the I2C slave address (0x57) over the bus. libnfc contains
* a hack to ignore this byte and try to read the length byte
* again.
* Set to 0 to disable the workaround, 1 to enable it.
*/
uint8_t enable_i2c_workaround;
/* I2C slave address. Multiple I2C addresses are
* possible for PN544 module. Configure address according to
* board design.
*/
uint8_t i2c_device_address;
} nfc_pn544_device_t;
static inline int nfc_pn544_open(const struct hw_module_t* module,
nfc_pn544_device_t** dev) {
return module->methods->open(module, NFC_PN544_CONTROLLER,
(struct hw_device_t**) dev);
}
static inline int nfc_pn544_close(nfc_pn544_device_t* dev) {
return dev->common.close(&dev->common);
}
/*
* End PN544 specific HAL
*/
__END_DECLS
#endif // ANDROID_NFC_HAL_INTERFACE_H
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