0329326e85
Creates a new "Near Field Communication" subsystem in drivers/nfc. http://en.wikipedia.org/wiki/Near_Field_Communication is useful ;) This is a driver for the pn544 NFC device. The driver transfers ETSI messages between the device and the user space. Signed-off-by: Matti J. Aaltonen <matti.j.aaltonen@nokia.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
97 lines
3.1 KiB
C
97 lines
3.1 KiB
C
/*
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* Driver include for the PN544 NFC chip.
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*
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* Copyright (C) Nokia Corporation
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*
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* Author: Jari Vanhala <ext-jari.vanhala@nokia.com>
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* Contact: Matti Aaltoenn <matti.j.aaltonen@nokia.com>
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifndef _PN544_H_
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#define _PN544_H_
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#include <linux/i2c.h>
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#define PN544_DRIVER_NAME "pn544"
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#define PN544_MAXWINDOW_SIZE 7
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#define PN544_WINDOW_SIZE 4
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#define PN544_RETRIES 10
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#define PN544_MAX_I2C_TRANSFER 0x0400
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#define PN544_MSG_MAX_SIZE 0x21 /* at normal HCI mode */
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/* ioctl */
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#define PN544_CHAR_BASE 'P'
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#define PN544_IOR(num, dtype) _IOR(PN544_CHAR_BASE, num, dtype)
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#define PN544_IOW(num, dtype) _IOW(PN544_CHAR_BASE, num, dtype)
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#define PN544_GET_FW_MODE PN544_IOW(1, unsigned int)
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#define PN544_SET_FW_MODE PN544_IOW(2, unsigned int)
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#define PN544_GET_DEBUG PN544_IOW(3, unsigned int)
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#define PN544_SET_DEBUG PN544_IOW(4, unsigned int)
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/* Timing restrictions (ms) */
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#define PN544_RESETVEN_TIME 30 /* 7 */
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#define PN544_PVDDVEN_TIME 0
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#define PN544_VBATVEN_TIME 0
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#define PN544_GPIO4VEN_TIME 0
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#define PN544_WAKEUP_ACK 5
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#define PN544_WAKEUP_GUARD (PN544_WAKEUP_ACK + 1)
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#define PN544_INACTIVITY_TIME 1000
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#define PN544_INTERFRAME_DELAY 200 /* us */
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#define PN544_BAUDRATE_CHANGE 150 /* us */
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/* Debug bits */
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#define PN544_DEBUG_BUF 0x01
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#define PN544_DEBUG_READ 0x02
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#define PN544_DEBUG_WRITE 0x04
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#define PN544_DEBUG_IRQ 0x08
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#define PN544_DEBUG_CALLS 0x10
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#define PN544_DEBUG_MODE 0x20
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/* Normal (HCI) mode */
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#define PN544_LLC_HCI_OVERHEAD 3 /* header + crc (to length) */
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#define PN544_LLC_MIN_SIZE (1 + PN544_LLC_HCI_OVERHEAD) /* length + */
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#define PN544_LLC_MAX_DATA (PN544_MSG_MAX_SIZE - 2)
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#define PN544_LLC_MAX_HCI_SIZE (PN544_LLC_MAX_DATA - 2)
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struct pn544_llc_packet {
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unsigned char length; /* of rest of packet */
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unsigned char header;
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unsigned char data[PN544_LLC_MAX_DATA]; /* includes crc-ccitt */
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};
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/* Firmware upgrade mode */
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#define PN544_FW_HEADER_SIZE 3
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/* max fw transfer is 1024bytes, but I2C limits it to 0xC0 */
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#define PN544_MAX_FW_DATA (PN544_MAX_I2C_TRANSFER - PN544_FW_HEADER_SIZE)
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struct pn544_fw_packet {
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unsigned char command; /* status in answer */
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unsigned char length[2]; /* big-endian order (msf) */
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unsigned char data[PN544_MAX_FW_DATA];
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};
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#ifdef __KERNEL__
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/* board config */
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struct pn544_nfc_platform_data {
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int (*request_resources) (struct i2c_client *client);
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void (*free_resources) (void);
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void (*enable) (int fw);
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int (*test) (void);
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void (*disable) (void);
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};
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#endif /* __KERNEL__ */
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#endif /* _PN544_H_ */
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