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_ */ 98