Linux kernel mirror (for testing)
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linux
1/*
2 * Driver include for the PN544 NFC chip.
3 *
4 * Copyright (C) Nokia Corporation
5 *
6 * Author: Jari Vanhala <ext-jari.vanhala@nokia.com>
7 * Contact: Matti Aaltoenn <matti.j.aaltonen@nokia.com>
8 *
9 * This program is free software; you can redistribute it and/or
10 * modify it under the terms of the GNU General Public License
11 * version 2 as published by the Free Software Foundation.
12 *
13 * This program is distributed in the hope that it will be useful,
14 * but WITHOUT ANY WARRANTY; without even the implied warranty of
15 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 * GNU General Public License for more details.
17 *
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
21 */
22
23#ifndef _PN544_H_
24#define _PN544_H_
25
26#include <linux/i2c.h>
27
28#define PN544_DRIVER_NAME "pn544"
29#define PN544_MAXWINDOW_SIZE 7
30#define PN544_WINDOW_SIZE 4
31#define PN544_RETRIES 10
32#define PN544_MAX_I2C_TRANSFER 0x0400
33#define PN544_MSG_MAX_SIZE 0x21 /* at normal HCI mode */
34
35/* ioctl */
36#define PN544_CHAR_BASE 'P'
37#define PN544_IOR(num, dtype) _IOR(PN544_CHAR_BASE, num, dtype)
38#define PN544_IOW(num, dtype) _IOW(PN544_CHAR_BASE, num, dtype)
39#define PN544_GET_FW_MODE PN544_IOW(1, unsigned int)
40#define PN544_SET_FW_MODE PN544_IOW(2, unsigned int)
41#define PN544_GET_DEBUG PN544_IOW(3, unsigned int)
42#define PN544_SET_DEBUG PN544_IOW(4, unsigned int)
43
44/* Timing restrictions (ms) */
45#define PN544_RESETVEN_TIME 30 /* 7 */
46#define PN544_PVDDVEN_TIME 0
47#define PN544_VBATVEN_TIME 0
48#define PN544_GPIO4VEN_TIME 0
49#define PN544_WAKEUP_ACK 5
50#define PN544_WAKEUP_GUARD (PN544_WAKEUP_ACK + 1)
51#define PN544_INACTIVITY_TIME 1000
52#define PN544_INTERFRAME_DELAY 200 /* us */
53#define PN544_BAUDRATE_CHANGE 150 /* us */
54
55/* Debug bits */
56#define PN544_DEBUG_BUF 0x01
57#define PN544_DEBUG_READ 0x02
58#define PN544_DEBUG_WRITE 0x04
59#define PN544_DEBUG_IRQ 0x08
60#define PN544_DEBUG_CALLS 0x10
61#define PN544_DEBUG_MODE 0x20
62
63/* Normal (HCI) mode */
64#define PN544_LLC_HCI_OVERHEAD 3 /* header + crc (to length) */
65#define PN544_LLC_MIN_SIZE (1 + PN544_LLC_HCI_OVERHEAD) /* length + */
66#define PN544_LLC_MAX_DATA (PN544_MSG_MAX_SIZE - 2)
67#define PN544_LLC_MAX_HCI_SIZE (PN544_LLC_MAX_DATA - 2)
68
69struct pn544_llc_packet {
70 unsigned char length; /* of rest of packet */
71 unsigned char header;
72 unsigned char data[PN544_LLC_MAX_DATA]; /* includes crc-ccitt */
73};
74
75/* Firmware upgrade mode */
76#define PN544_FW_HEADER_SIZE 3
77/* max fw transfer is 1024bytes, but I2C limits it to 0xC0 */
78#define PN544_MAX_FW_DATA (PN544_MAX_I2C_TRANSFER - PN544_FW_HEADER_SIZE)
79
80struct pn544_fw_packet {
81 unsigned char command; /* status in answer */
82 unsigned char length[2]; /* big-endian order (msf) */
83 unsigned char data[PN544_MAX_FW_DATA];
84};
85
86#ifdef __KERNEL__
87/* board config */
88struct pn544_nfc_platform_data {
89 int (*request_resources) (struct i2c_client *client);
90 void (*free_resources) (void);
91 void (*enable) (int fw);
92 int (*test) (void);
93 void (*disable) (void);
94};
95#endif /* __KERNEL__ */
96
97#endif /* _PN544_H_ */