[deliverable/linux.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 PROTOCOL_ERR(req) pr_err("%d: NFC Digital Protocol error: %s\n", \
				 __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, struct digital_tg_mdaa_params *params,
		     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, NULL, 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_in_send_iso15693_inv_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);

int digital_tg_configure_hw(struct nfc_digital_dev *ddev, int type, int param);
static inline int digital_tg_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_TG_SEND, skb, NULL, timeout,
				cmd_cb, cb_context);
}

void digital_tg_recv_sens_req(struct nfc_digital_dev *ddev, void *arg,
			      struct sk_buff *resp);

void digital_tg_recv_sensf_req(struct nfc_digital_dev *ddev, void *arg,
			       struct sk_buff *resp);

static inline int digital_tg_listen(struct nfc_digital_dev *ddev, u16 timeout,
				    nfc_digital_cmd_complete_t cb, void *arg)
{
	return digital_send_cmd(ddev, DIGITAL_CMD_TG_LISTEN, NULL, NULL,
				timeout, cb, arg);
}

void digital_tg_recv_atr_req(struct nfc_digital_dev *ddev, void *arg,
			     struct sk_buff *resp);

int digital_tg_send_dep_res(struct nfc_digital_dev *ddev, struct sk_buff *skb);

int digital_tg_listen_nfca(struct nfc_digital_dev *ddev, u8 rf_tech);
int digital_tg_listen_nfcf(struct nfc_digital_dev *ddev, u8 rf_tech);

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
c5da0e4a SO	25	#define PROTOCOL_ERR(req) pr_err("%d: NFC Digital Protocol error: %s\n", \
c5da0e4a SO	26	__LINE__, req)
4b10884e	27
59ee2361 TE	28	#define DIGITAL_CMD_IN_SEND 0
	29	#define DIGITAL_CMD_TG_SEND 1
	30	#define DIGITAL_CMD_TG_LISTEN 2
	31	#define DIGITAL_CMD_TG_LISTEN_MDAA 3
	32
	33	#define DIGITAL_MAX_HEADER_LEN 7
	34	#define DIGITAL_CRC_LEN 2
	35
7d0911c0 TE	36	#define DIGITAL_SENSF_NFCID2_NFC_DEP_B1 0x01
	37	#define DIGITAL_SENSF_NFCID2_NFC_DEP_B2 0xFE
	38
	39	#define DIGITAL_SENS_RES_NFC_DEP 0x0100
	40	#define DIGITAL_SEL_RES_NFC_DEP 0x40
	41	#define DIGITAL_SENSF_FELICA_SC 0xFFFF
	42
2c66daec TE	43	#define DIGITAL_DRV_CAPS_IN_CRC(ddev) \
	44	((ddev)->driver_capabilities & NFC_DIGITAL_DRV_CAPS_IN_CRC)
	45	#define DIGITAL_DRV_CAPS_TG_CRC(ddev) \
	46	((ddev)->driver_capabilities & NFC_DIGITAL_DRV_CAPS_TG_CRC)
	47
	48	struct digital_data_exch {
	49	data_exchange_cb_t cb;
	50	void *cb_context;
	51	};
	52
59ee2361 TE	53	struct sk_buff digital_skb_alloc(struct nfc_digital_dev ddev,
	54	unsigned int len);
	55
	56	int digital_send_cmd(struct nfc_digital_dev *ddev, u8 cmd_type,
1c7a4c24 TE	57	struct sk_buff skb, struct digital_tg_mdaa_params params,
	58	u16 timeout, nfc_digital_cmd_complete_t cmd_cb,
	59	void *cb_context);
59ee2361 TE	60
	61	int digital_in_configure_hw(struct nfc_digital_dev *ddev, int type, int param);
	62	static inline int digital_in_send_cmd(struct nfc_digital_dev *ddev,
	63	struct sk_buff *skb, u16 timeout,
	64	nfc_digital_cmd_complete_t cmd_cb,
	65	void *cb_context)
	66	{
1c7a4c24 TE	67	return digital_send_cmd(ddev, DIGITAL_CMD_IN_SEND, skb, NULL, timeout,
1c7a4c24 TE	68	cmd_cb, cb_context);
59ee2361 TE	69	}
	70
	71	void digital_poll_next_tech(struct nfc_digital_dev *ddev);
	72
	73	int digital_in_send_sens_req(struct nfc_digital_dev *ddev, u8 rf_tech);
8c0695e4	74	int digital_in_send_sensf_req(struct nfc_digital_dev *ddev, u8 rf_tech);
a381d482	75	int digital_in_send_iso15693_inv_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
1c7a4c24 TE	89	int digital_tg_configure_hw(struct nfc_digital_dev *ddev, int type, int param);
	90	static inline int digital_tg_send_cmd(struct nfc_digital_dev *ddev,
	91	struct sk_buff *skb, u16 timeout,
	92	nfc_digital_cmd_complete_t cmd_cb, void *cb_context)
	93	{
	94	return digital_send_cmd(ddev, DIGITAL_CMD_TG_SEND, skb, NULL, timeout,
	95	cmd_cb, cb_context);
	96	}
	97
	98	void digital_tg_recv_sens_req(struct nfc_digital_dev ddev, void arg,
	99	struct sk_buff *resp);
	100
	101	void digital_tg_recv_sensf_req(struct nfc_digital_dev ddev, void arg,
	102	struct sk_buff *resp);
	103
	104	static inline int digital_tg_listen(struct nfc_digital_dev *ddev, u16 timeout,
	105	nfc_digital_cmd_complete_t cb, void *arg)
	106	{
	107	return digital_send_cmd(ddev, DIGITAL_CMD_TG_LISTEN, NULL, NULL,
	108	timeout, cb, arg);
	109	}
	110
	111	void digital_tg_recv_atr_req(struct nfc_digital_dev ddev, void arg,
	112	struct sk_buff *resp);
	113
	114	int digital_tg_send_dep_res(struct nfc_digital_dev ddev, struct sk_buff skb);
	115
	116	int digital_tg_listen_nfca(struct nfc_digital_dev *ddev, u8 rf_tech);
	117	int digital_tg_listen_nfcf(struct nfc_digital_dev *ddev, u8 rf_tech);
	118
2c66daec TE	119	typedef u16 (crc_func_t)(u16, const u8 , size_t);
	120
	121	#define CRC_A_INIT 0x6363
	122	#define CRC_B_INIT 0xFFFF
8c0695e4	123	#define CRC_F_INIT 0x0000
2c66daec TE	124
	125	void digital_skb_add_crc(struct sk_buff *skb, crc_func_t crc_func, u16 init,
	126	u8 bitwise_inv, u8 msb_first);
	127
	128	static inline void digital_skb_add_crc_a(struct sk_buff *skb)
	129	{
	130	digital_skb_add_crc(skb, crc_ccitt, CRC_A_INIT, 0, 0);
	131	}
	132
	133	static inline void digital_skb_add_crc_b(struct sk_buff *skb)
	134	{
	135	digital_skb_add_crc(skb, crc_ccitt, CRC_B_INIT, 1, 0);
	136	}
	137
8c0695e4 TE	138	static inline void digital_skb_add_crc_f(struct sk_buff *skb)
	139	{
	140	digital_skb_add_crc(skb, crc_itu_t, CRC_F_INIT, 0, 1);
	141	}
	142
2c66daec TE	143	static inline void digital_skb_add_crc_none(struct sk_buff *skb)
	144	{
	145	return;
	146	}
	147
	148	int digital_skb_check_crc(struct sk_buff *skb, crc_func_t crc_func,
	149	u16 crc_init, u8 bitwise_inv, u8 msb_first);
	150
	151	static inline int digital_skb_check_crc_a(struct sk_buff *skb)
	152	{
	153	return digital_skb_check_crc(skb, crc_ccitt, CRC_A_INIT, 0, 0);
	154	}
	155
	156	static inline int digital_skb_check_crc_b(struct sk_buff *skb)
	157	{
	158	return digital_skb_check_crc(skb, crc_ccitt, CRC_B_INIT, 1, 0);
	159	}
	160
8c0695e4 TE	161	static inline int digital_skb_check_crc_f(struct sk_buff *skb)
	162	{
	163	return digital_skb_check_crc(skb, crc_itu_t, CRC_F_INIT, 0, 1);
	164	}
	165
2c66daec TE	166	static inline int digital_skb_check_crc_none(struct sk_buff *skb)
	167	{
	168	return 0;
	169	}
	170
4b10884e	171	#endif /* __DIGITAL_H */