| Matti J. Aaltonen | 0329326 | 2011-01-12 17:00:47 -0800 | [diff] [blame] | 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 | |
| 69 | struct 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 | |
| 80 | struct 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 */ |
| 88 | struct 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_ */ |