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pn544.h
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1 /*
2  * Driver include for the PN544 NFC chip.
3  *
4  * Copyright (C) Nokia Corporation
5  *
6  * Author: Jari Vanhala <[email protected]>
7  * Contact: Matti Aaltoenn <[email protected]>
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 
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 
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 enum {
88  NFC_GPIO_ENABLE,
89  NFC_GPIO_FW_RESET,
90  NFC_GPIO_IRQ
91 };
92 
93 /* board config */
94 struct pn544_nfc_platform_data {
95  int (*request_resources) (struct i2c_client *client);
96  void (*free_resources) (void);
97  void (*enable) (int fw);
98  int (*test) (void);
99  void (*disable) (void);
100  int (*get_gpio)(int type);
101 };
102 #endif /* __KERNEL__ */
103 
104 #endif /* _PN544_H_ */