[linux-2.6-block.git] / net / nfc / digital.h

/*
 * NFC Digital Protocol stack
 * Copyright (c) 2013, Intel Corporation.
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 */

#ifndef __DIGITAL_H
#define __DIGITAL_H

#include <net/nfc/nfc.h>
#include <net/nfc/digital.h>

#include <linux/crc-ccitt.h>
#include <linux/crc-itu-t.h>

#define PR_DBG(fmt, ...)  pr_debug("%s: " fmt "\n", __func__, ##__VA_ARGS__)
#define PR_ERR(fmt, ...)  pr_err("%s: " fmt "\n", __func__, ##__VA_ARGS__)
#define PROTOCOL_ERR(req) pr_err("%s:%d: NFC Digital Protocol error: %s\n", \
				 __func__, __LINE__, req)

#define DIGITAL_CMD_IN_SEND        0
#define DIGITAL_CMD_TG_SEND        1
#define DIGITAL_CMD_TG_LISTEN      2
#define DIGITAL_CMD_TG_LISTEN_MDAA 3

#define DIGITAL_MAX_HEADER_LEN 7
#define DIGITAL_CRC_LEN        2

#define DIGITAL_SENSF_NFCID2_NFC_DEP_B1 0x01
#define DIGITAL_SENSF_NFCID2_NFC_DEP_B2 0xFE

#define DIGITAL_SENS_RES_NFC_DEP 0x0100
#define DIGITAL_SEL_RES_NFC_DEP  0x40
#define DIGITAL_SENSF_FELICA_SC  0xFFFF

#define DIGITAL_DRV_CAPS_IN_CRC(ddev) \
	((ddev)->driver_capabilities & NFC_DIGITAL_DRV_CAPS_IN_CRC)
#define DIGITAL_DRV_CAPS_TG_CRC(ddev) \
	((ddev)->driver_capabilities & NFC_DIGITAL_DRV_CAPS_TG_CRC)

struct digital_data_exch {
	data_exchange_cb_t cb;
	void *cb_context;
};

struct sk_buff *digital_skb_alloc(struct nfc_digital_dev *ddev,
				  unsigned int len);

int digital_send_cmd(struct nfc_digital_dev *ddev, u8 cmd_type,
		     struct sk_buff *skb, u16 timeout,
		     nfc_digital_cmd_complete_t cmd_cb, void *cb_context);

int digital_in_configure_hw(struct nfc_digital_dev *ddev, int type, int param);
static inline int digital_in_send_cmd(struct nfc_digital_dev *ddev,
				      struct sk_buff *skb, u16 timeout,
				      nfc_digital_cmd_complete_t cmd_cb,
				      void *cb_context)
{
	return digital_send_cmd(ddev, DIGITAL_CMD_IN_SEND, skb, timeout, cmd_cb,
				cb_context);
}

void digital_poll_next_tech(struct nfc_digital_dev *ddev);

int digital_in_send_sens_req(struct nfc_digital_dev *ddev, u8 rf_tech);
int digital_in_send_sensf_req(struct nfc_digital_dev *ddev, u8 rf_tech);

int digital_target_found(struct nfc_digital_dev *ddev,
			 struct nfc_target *target, u8 protocol);

int digital_in_recv_mifare_res(struct sk_buff *resp);

int digital_in_send_atr_req(struct nfc_digital_dev *ddev,
			    struct nfc_target *target, __u8 comm_mode, __u8 *gb,
			    size_t gb_len);
int digital_in_send_dep_req(struct nfc_digital_dev *ddev,
			    struct nfc_target *target, struct sk_buff *skb,
			    struct digital_data_exch *data_exch);

typedef u16 (*crc_func_t)(u16, const u8 *, size_t);

#define CRC_A_INIT 0x6363
#define CRC_B_INIT 0xFFFF
#define CRC_F_INIT 0x0000

void digital_skb_add_crc(struct sk_buff *skb, crc_func_t crc_func, u16 init,
			 u8 bitwise_inv, u8 msb_first);

static inline void digital_skb_add_crc_a(struct sk_buff *skb)
{
	digital_skb_add_crc(skb, crc_ccitt, CRC_A_INIT, 0, 0);
}

static inline void digital_skb_add_crc_b(struct sk_buff *skb)
{
	digital_skb_add_crc(skb, crc_ccitt, CRC_B_INIT, 1, 0);
}

static inline void digital_skb_add_crc_f(struct sk_buff *skb)
{
	digital_skb_add_crc(skb, crc_itu_t, CRC_F_INIT, 0, 1);
}

static inline void digital_skb_add_crc_none(struct sk_buff *skb)
{
	return;
}

int digital_skb_check_crc(struct sk_buff *skb, crc_func_t crc_func,
			  u16 crc_init, u8 bitwise_inv, u8 msb_first);

static inline int digital_skb_check_crc_a(struct sk_buff *skb)
{
	return digital_skb_check_crc(skb, crc_ccitt, CRC_A_INIT, 0, 0);
}

static inline int digital_skb_check_crc_b(struct sk_buff *skb)
{
	return digital_skb_check_crc(skb, crc_ccitt, CRC_B_INIT, 1, 0);
}

static inline int digital_skb_check_crc_f(struct sk_buff *skb)
{
	return digital_skb_check_crc(skb, crc_itu_t, CRC_F_INIT, 0, 1);
}

static inline int digital_skb_check_crc_none(struct sk_buff *skb)
{
	return 0;
}

#endif /* __DIGITAL_H */
Commit	Line	Data
4b10884e TE	1	/*
	2	* NFC Digital Protocol stack
	3	* Copyright (c) 2013, Intel Corporation.
	4	*
	5	* This program is free software; you can redistribute it and/or modify it
	6	* under the terms and conditions of the GNU General Public License,
	7	* version 2, as published by the Free Software Foundation.
	8	*
	9	* This program is distributed in the hope it will be useful, but WITHOUT
	10	* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
	11	* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
	12	* more details.
	13	*
	14	*/
	15
	16	#ifndef __DIGITAL_H
	17	#define __DIGITAL_H
	18
	19	#include <net/nfc/nfc.h>
	20	#include <net/nfc/digital.h>
	21
2c66daec	22	#include <linux/crc-ccitt.h>
8c0695e4	23	#include <linux/crc-itu-t.h>
2c66daec	24
4b10884e TE	25	#define PR_DBG(fmt, ...) pr_debug("%s: " fmt "\n", __func__, ##__VA_ARGS__)
	26	#define PR_ERR(fmt, ...) pr_err("%s: " fmt "\n", __func__, ##__VA_ARGS__)
	27	#define PROTOCOL_ERR(req) pr_err("%s:%d: NFC Digital Protocol error: %s\n", \
	28	__func__, __LINE__, req)
	29
59ee2361 TE	30	#define DIGITAL_CMD_IN_SEND 0
	31	#define DIGITAL_CMD_TG_SEND 1
	32	#define DIGITAL_CMD_TG_LISTEN 2
	33	#define DIGITAL_CMD_TG_LISTEN_MDAA 3
	34
	35	#define DIGITAL_MAX_HEADER_LEN 7
	36	#define DIGITAL_CRC_LEN 2
	37
7d0911c0 TE	38	#define DIGITAL_SENSF_NFCID2_NFC_DEP_B1 0x01
	39	#define DIGITAL_SENSF_NFCID2_NFC_DEP_B2 0xFE
	40
	41	#define DIGITAL_SENS_RES_NFC_DEP 0x0100
	42	#define DIGITAL_SEL_RES_NFC_DEP 0x40
	43	#define DIGITAL_SENSF_FELICA_SC 0xFFFF
	44
2c66daec TE	45	#define DIGITAL_DRV_CAPS_IN_CRC(ddev) \
	46	((ddev)->driver_capabilities & NFC_DIGITAL_DRV_CAPS_IN_CRC)
	47	#define DIGITAL_DRV_CAPS_TG_CRC(ddev) \
	48	((ddev)->driver_capabilities & NFC_DIGITAL_DRV_CAPS_TG_CRC)
	49
	50	struct digital_data_exch {
	51	data_exchange_cb_t cb;
	52	void *cb_context;
	53	};
	54
59ee2361 TE	55	struct sk_buff digital_skb_alloc(struct nfc_digital_dev ddev,
	56	unsigned int len);
	57
	58	int digital_send_cmd(struct nfc_digital_dev *ddev, u8 cmd_type,
	59	struct sk_buff *skb, u16 timeout,
	60	nfc_digital_cmd_complete_t cmd_cb, void *cb_context);
	61
	62	int digital_in_configure_hw(struct nfc_digital_dev *ddev, int type, int param);
	63	static inline int digital_in_send_cmd(struct nfc_digital_dev *ddev,
	64	struct sk_buff *skb, u16 timeout,
	65	nfc_digital_cmd_complete_t cmd_cb,
	66	void *cb_context)
	67	{
	68	return digital_send_cmd(ddev, DIGITAL_CMD_IN_SEND, skb, timeout, cmd_cb,
	69	cb_context);
	70	}
	71
	72	void digital_poll_next_tech(struct nfc_digital_dev *ddev);
	73
	74	int digital_in_send_sens_req(struct nfc_digital_dev *ddev, u8 rf_tech);
8c0695e4	75	int digital_in_send_sensf_req(struct nfc_digital_dev *ddev, u8 rf_tech);
59ee2361	76
2c66daec TE	77	int digital_target_found(struct nfc_digital_dev *ddev,
	78	struct nfc_target *target, u8 protocol);
	79
	80	int digital_in_recv_mifare_res(struct sk_buff *resp);
	81
7d0911c0 TE	82	int digital_in_send_atr_req(struct nfc_digital_dev *ddev,
	83	struct nfc_target target, __u8 comm_mode, __u8 gb,
	84	size_t gb_len);
	85	int digital_in_send_dep_req(struct nfc_digital_dev *ddev,
	86	struct nfc_target target, struct sk_buff skb,
	87	struct digital_data_exch *data_exch);
	88
2c66daec TE	89	typedef u16 (crc_func_t)(u16, const u8 , size_t);
	90
	91	#define CRC_A_INIT 0x6363
	92	#define CRC_B_INIT 0xFFFF
8c0695e4	93	#define CRC_F_INIT 0x0000
2c66daec TE	94
	95	void digital_skb_add_crc(struct sk_buff *skb, crc_func_t crc_func, u16 init,
	96	u8 bitwise_inv, u8 msb_first);
	97
	98	static inline void digital_skb_add_crc_a(struct sk_buff *skb)
	99	{
	100	digital_skb_add_crc(skb, crc_ccitt, CRC_A_INIT, 0, 0);
	101	}
	102
	103	static inline void digital_skb_add_crc_b(struct sk_buff *skb)
	104	{
	105	digital_skb_add_crc(skb, crc_ccitt, CRC_B_INIT, 1, 0);
	106	}
	107
8c0695e4 TE	108	static inline void digital_skb_add_crc_f(struct sk_buff *skb)
	109	{
	110	digital_skb_add_crc(skb, crc_itu_t, CRC_F_INIT, 0, 1);
	111	}
	112
2c66daec TE	113	static inline void digital_skb_add_crc_none(struct sk_buff *skb)
	114	{
	115	return;
	116	}
	117
	118	int digital_skb_check_crc(struct sk_buff *skb, crc_func_t crc_func,
	119	u16 crc_init, u8 bitwise_inv, u8 msb_first);
	120
	121	static inline int digital_skb_check_crc_a(struct sk_buff *skb)
	122	{
	123	return digital_skb_check_crc(skb, crc_ccitt, CRC_A_INIT, 0, 0);
	124	}
	125
	126	static inline int digital_skb_check_crc_b(struct sk_buff *skb)
	127	{
	128	return digital_skb_check_crc(skb, crc_ccitt, CRC_B_INIT, 1, 0);
	129	}
	130
8c0695e4 TE	131	static inline int digital_skb_check_crc_f(struct sk_buff *skb)
	132	{
	133	return digital_skb_check_crc(skb, crc_itu_t, CRC_F_INIT, 0, 1);
	134	}
	135
2c66daec TE	136	static inline int digital_skb_check_crc_none(struct sk_buff *skb)
	137	{
	138	return 0;
	139	}
	140
4b10884e	141	#endif /* __DIGITAL_H */