![Eric Lapuyade](/assets/img/avatar_default.png)
This is an NFC driver for NXP pn544. Unlike pn544.c, this one is based on the NFC HCI and SHDLC kernel layers. Signed-off-by: Eric Lapuyade <eric.lapuyade@intel.com> Signed-off-by: Samuel Ortiz <sameo@linux.intel.com> Signed-off-by: John W. Linville <linville@tuxdriver.com>
105 lines
3.2 KiB
C
105 lines
3.2 KiB
C
/*
|
|
* Driver include for the PN544 NFC chip.
|
|
*
|
|
* Copyright (C) Nokia Corporation
|
|
*
|
|
* Author: Jari Vanhala <ext-jari.vanhala@nokia.com>
|
|
* Contact: Matti Aaltoenn <matti.j.aaltonen@nokia.com>
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* version 2 as published by the Free Software Foundation.
|
|
*
|
|
* This program is distributed in the hope that it will be useful,
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
|
* GNU General Public License for more details.
|
|
*
|
|
* You should have received a copy of the GNU General Public License
|
|
* along with this program; if not, write to the Free Software
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
|
*/
|
|
|
|
#ifndef _PN544_H_
|
|
#define _PN544_H_
|
|
|
|
#include <linux/i2c.h>
|
|
|
|
#define PN544_DRIVER_NAME "pn544"
|
|
#define PN544_MAXWINDOW_SIZE 7
|
|
#define PN544_WINDOW_SIZE 4
|
|
#define PN544_RETRIES 10
|
|
#define PN544_MAX_I2C_TRANSFER 0x0400
|
|
#define PN544_MSG_MAX_SIZE 0x21 /* at normal HCI mode */
|
|
|
|
/* ioctl */
|
|
#define PN544_CHAR_BASE 'P'
|
|
#define PN544_IOR(num, dtype) _IOR(PN544_CHAR_BASE, num, dtype)
|
|
#define PN544_IOW(num, dtype) _IOW(PN544_CHAR_BASE, num, dtype)
|
|
#define PN544_GET_FW_MODE PN544_IOW(1, unsigned int)
|
|
#define PN544_SET_FW_MODE PN544_IOW(2, unsigned int)
|
|
#define PN544_GET_DEBUG PN544_IOW(3, unsigned int)
|
|
#define PN544_SET_DEBUG PN544_IOW(4, unsigned int)
|
|
|
|
/* Timing restrictions (ms) */
|
|
#define PN544_RESETVEN_TIME 30 /* 7 */
|
|
#define PN544_PVDDVEN_TIME 0
|
|
#define PN544_VBATVEN_TIME 0
|
|
#define PN544_GPIO4VEN_TIME 0
|
|
#define PN544_WAKEUP_ACK 5
|
|
#define PN544_WAKEUP_GUARD (PN544_WAKEUP_ACK + 1)
|
|
#define PN544_INACTIVITY_TIME 1000
|
|
#define PN544_INTERFRAME_DELAY 200 /* us */
|
|
#define PN544_BAUDRATE_CHANGE 150 /* us */
|
|
|
|
/* Debug bits */
|
|
#define PN544_DEBUG_BUF 0x01
|
|
#define PN544_DEBUG_READ 0x02
|
|
#define PN544_DEBUG_WRITE 0x04
|
|
#define PN544_DEBUG_IRQ 0x08
|
|
#define PN544_DEBUG_CALLS 0x10
|
|
#define PN544_DEBUG_MODE 0x20
|
|
|
|
/* Normal (HCI) mode */
|
|
#define PN544_LLC_HCI_OVERHEAD 3 /* header + crc (to length) */
|
|
#define PN544_LLC_MIN_SIZE (1 + PN544_LLC_HCI_OVERHEAD) /* length + */
|
|
#define PN544_LLC_MAX_DATA (PN544_MSG_MAX_SIZE - 2)
|
|
#define PN544_LLC_MAX_HCI_SIZE (PN544_LLC_MAX_DATA - 2)
|
|
|
|
struct pn544_llc_packet {
|
|
unsigned char length; /* of rest of packet */
|
|
unsigned char header;
|
|
unsigned char data[PN544_LLC_MAX_DATA]; /* includes crc-ccitt */
|
|
};
|
|
|
|
/* Firmware upgrade mode */
|
|
#define PN544_FW_HEADER_SIZE 3
|
|
/* max fw transfer is 1024bytes, but I2C limits it to 0xC0 */
|
|
#define PN544_MAX_FW_DATA (PN544_MAX_I2C_TRANSFER - PN544_FW_HEADER_SIZE)
|
|
|
|
struct pn544_fw_packet {
|
|
unsigned char command; /* status in answer */
|
|
unsigned char length[2]; /* big-endian order (msf) */
|
|
unsigned char data[PN544_MAX_FW_DATA];
|
|
};
|
|
|
|
#ifdef __KERNEL__
|
|
enum {
|
|
NFC_GPIO_ENABLE,
|
|
NFC_GPIO_FW_RESET,
|
|
NFC_GPIO_IRQ
|
|
};
|
|
|
|
/* board config */
|
|
struct pn544_nfc_platform_data {
|
|
int (*request_resources) (struct i2c_client *client);
|
|
void (*free_resources) (void);
|
|
void (*enable) (int fw);
|
|
int (*test) (void);
|
|
void (*disable) (void);
|
|
int (*get_gpio)(int type);
|
|
};
|
|
#endif /* __KERNEL__ */
|
|
|
|
#endif /* _PN544_H_ */
|