include/linux/can/dev/peak_canfd.h - arm/linux - Git at Google

 /*
  * CAN driver for PEAK System micro-CAN based adapters
  *
  * Copyright (C) 2003-2011 PEAK System-Technik GmbH
  * Copyright (C) 2011-2013 Stephane Grosjean <s.grosjean@peak-system.com>
  *
  * This program is free software; you can redistribute it and/or modify it
  * under the terms of the GNU General Public License as published
  * by the Free Software Foundation; version 2 of the License.
  *
  * This program is distributed in the hope that 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 PUCAN_H
 #define PUCAN_H

 /* uCAN commands opcodes list (low-order 10 bits) */
 #define PUCAN_CMD_NOP			0x000
 #define PUCAN_CMD_RESET_MODE		0x001
 #define PUCAN_CMD_NORMAL_MODE		0x002
 #define PUCAN_CMD_LISTEN_ONLY_MODE	0x003
 #define PUCAN_CMD_TIMING_SLOW		0x004
 #define PUCAN_CMD_TIMING_FAST		0x005
 #define PUCAN_CMD_SET_STD_FILTER	0x006
 #define PUCAN_CMD_RESERVED2		0x007
 #define PUCAN_CMD_FILTER_STD		0x008
 #define PUCAN_CMD_TX_ABORT		0x009
 #define PUCAN_CMD_WR_ERR_CNT		0x00a
 #define PUCAN_CMD_SET_EN_OPTION		0x00b
 #define PUCAN_CMD_CLR_DIS_OPTION	0x00c
 #define PUCAN_CMD_RX_BARRIER		0x010
 #define PUCAN_CMD_END_OF_COLLECTION	0x3ff

 /* uCAN received messages list */
 #define PUCAN_MSG_CAN_RX		0x0001
 #define PUCAN_MSG_ERROR			0x0002
 #define PUCAN_MSG_STATUS		0x0003
 #define PUCAN_MSG_BUSLOAD		0x0004

 #define PUCAN_MSG_CACHE_CRITICAL	0x0102

 /* uCAN transmitted messages */
 #define PUCAN_MSG_CAN_TX		0x1000

 /* uCAN command common header */
 struct __packed pucan_command {
 	__le16	opcode_channel;
 	u16	args[3];
 };

 /* return the opcode from the opcode_channel field of a command */
 static inline u16 pucan_cmd_get_opcode(struct pucan_command *c)
 {
 	return le16_to_cpu(c->opcode_channel) & 0x3ff;
 }

 #define PUCAN_TSLOW_BRP_BITS		10
 #define PUCAN_TSLOW_TSGEG1_BITS		8
 #define PUCAN_TSLOW_TSGEG2_BITS		7
 #define PUCAN_TSLOW_SJW_BITS		7

 #define PUCAN_TSLOW_BRP_MASK		((1 << PUCAN_TSLOW_BRP_BITS) - 1)
 #define PUCAN_TSLOW_TSEG1_MASK		((1 << PUCAN_TSLOW_TSGEG1_BITS) - 1)
 #define PUCAN_TSLOW_TSEG2_MASK		((1 << PUCAN_TSLOW_TSGEG2_BITS) - 1)
 #define PUCAN_TSLOW_SJW_MASK		((1 << PUCAN_TSLOW_SJW_BITS) - 1)

 /* uCAN TIMING_SLOW command fields */
 #define PUCAN_TSLOW_SJW_T(s, t)		(((s) & PUCAN_TSLOW_SJW_MASK) | \
 								((!!(t)) << 7))
 #define PUCAN_TSLOW_TSEG2(t)		((t) & PUCAN_TSLOW_TSEG2_MASK)
 #define PUCAN_TSLOW_TSEG1(t)		((t) & PUCAN_TSLOW_TSEG1_MASK)
 #define PUCAN_TSLOW_BRP(b)		((b) & PUCAN_TSLOW_BRP_MASK)

 struct __packed pucan_timing_slow {
 	__le16	opcode_channel;

 	u8	ewl;		/* Error Warning limit */
 	u8	sjw_t;		/* Sync Jump Width + Triple sampling */
 	u8	tseg2;		/* Timing SEGment 2 */
 	u8	tseg1;		/* Timing SEGment 1 */

 	__le16	brp;		/* BaudRate Prescaler */
 };

 #define PUCAN_TFAST_BRP_BITS		10
 #define PUCAN_TFAST_TSGEG1_BITS		5
 #define PUCAN_TFAST_TSGEG2_BITS		4
 #define PUCAN_TFAST_SJW_BITS		4

 #define PUCAN_TFAST_BRP_MASK		((1 << PUCAN_TFAST_BRP_BITS) - 1)
 #define PUCAN_TFAST_TSEG1_MASK		((1 << PUCAN_TFAST_TSGEG1_BITS) - 1)
 #define PUCAN_TFAST_TSEG2_MASK		((1 << PUCAN_TFAST_TSGEG2_BITS) - 1)
 #define PUCAN_TFAST_SJW_MASK		((1 << PUCAN_TFAST_SJW_BITS) - 1)

 /* uCAN TIMING_FAST command fields */
 #define PUCAN_TFAST_SJW(s)		((s) & PUCAN_TFAST_SJW_MASK)
 #define PUCAN_TFAST_TSEG2(t)		((t) & PUCAN_TFAST_TSEG2_MASK)
 #define PUCAN_TFAST_TSEG1(t)		((t) & PUCAN_TFAST_TSEG1_MASK)
 #define PUCAN_TFAST_BRP(b)		((b) & PUCAN_TFAST_BRP_MASK)

 struct __packed pucan_timing_fast {
 	__le16	opcode_channel;

 	u8	unused;
 	u8	sjw;		/* Sync Jump Width */
 	u8	tseg2;		/* Timing SEGment 2 */
 	u8	tseg1;		/* Timing SEGment 1 */

 	__le16	brp;		/* BaudRate Prescaler */
 };

 /* uCAN FILTER_STD command fields */
 #define PUCAN_FLTSTD_ROW_IDX_BITS	6

 struct __packed pucan_filter_std {
 	__le16	opcode_channel;

 	__le16	idx;
 	__le32	mask;		/* CAN-ID bitmask in idx range */
 };

 #define PUCAN_FLTSTD_ROW_IDX_MAX	((1 << PUCAN_FLTSTD_ROW_IDX_BITS) - 1)

 /* uCAN SET_STD_FILTER command fields */
 struct __packed pucan_std_filter {
 	__le16	opcode_channel;

 	u8	unused;
 	u8	idx;
 	__le32	mask;		/* CAN-ID bitmask in idx range */
 };

 /* uCAN TX_ABORT commands fields */
 #define PUCAN_TX_ABORT_FLUSH		0x0001

 struct __packed pucan_tx_abort {
 	__le16	opcode_channel;

 	__le16	flags;
 	u32	unused;
 };

 /* uCAN WR_ERR_CNT command fields */
 #define PUCAN_WRERRCNT_TE		0x4000	/* Tx error cntr write Enable */
 #define PUCAN_WRERRCNT_RE		0x8000	/* Rx error cntr write Enable */

 struct __packed pucan_wr_err_cnt {
 	__le16	opcode_channel;

 	__le16	sel_mask;
 	u8	tx_counter;	/* Tx error counter new value */
 	u8	rx_counter;	/* Rx error counter new value */

 	u16	unused;
 };

 /* uCAN SET_EN/CLR_DIS _OPTION command fields */
 #define PUCAN_OPTION_ERROR		0x0001
 #define PUCAN_OPTION_BUSLOAD		0x0002
 #define PUCAN_OPTION_CANDFDISO		0x0004

 struct __packed pucan_options {
 	__le16	opcode_channel;

 	__le16	options;
 	u32	unused;
 };

 /* uCAN received messages global format */
 struct __packed pucan_msg {
 	__le16	size;
 	__le16	type;
 	__le32	ts_low;
 	__le32	ts_high;
 };

 /* uCAN flags for CAN/CANFD messages */
 #define PUCAN_MSG_SELF_RECEIVE		0x80
 #define PUCAN_MSG_ERROR_STATE_IND	0x40	/* error state indicator */
 #define PUCAN_MSG_BITRATE_SWITCH	0x20	/* bitrate switch */
 #define PUCAN_MSG_EXT_DATA_LEN		0x10	/* extended data length */
 #define PUCAN_MSG_SINGLE_SHOT		0x08
 #define PUCAN_MSG_LOOPED_BACK		0x04
 #define PUCAN_MSG_EXT_ID		0x02
 #define PUCAN_MSG_RTR			0x01

 struct __packed pucan_rx_msg {
 	__le16	size;
 	__le16	type;
 	__le32	ts_low;
 	__le32	ts_high;
 	__le32	tag_low;
 	__le32	tag_high;
 	u8	channel_dlc;
 	u8	client;
 	__le16	flags;
 	__le32	can_id;
 	u8	d[0];
 };

 /* uCAN error types */
 #define PUCAN_ERMSG_BIT_ERROR		0
 #define PUCAN_ERMSG_FORM_ERROR		1
 #define PUCAN_ERMSG_STUFF_ERROR		2
 #define PUCAN_ERMSG_OTHER_ERROR		3
 #define PUCAN_ERMSG_ERR_CNT_DEC		4

 struct __packed pucan_error_msg {
 	__le16	size;
 	__le16	type;
 	__le32	ts_low;
 	__le32	ts_high;
 	u8	channel_type_d;
 	u8	code_g;
 	u8	tx_err_cnt;
 	u8	rx_err_cnt;
 };

 static inline int pucan_error_get_channel(const struct pucan_error_msg *msg)
 {
 	return msg->channel_type_d & 0x0f;
 }

 #define PUCAN_RX_BARRIER		0x10
 #define PUCAN_BUS_PASSIVE		0x20
 #define PUCAN_BUS_WARNING		0x40
 #define PUCAN_BUS_BUSOFF		0x80

 struct __packed pucan_status_msg {
 	__le16	size;
 	__le16	type;
 	__le32	ts_low;
 	__le32	ts_high;
 	u8	channel_p_w_b;
 	u8	unused[3];
 };

 static inline int pucan_status_get_channel(const struct pucan_status_msg *msg)
 {
 	return msg->channel_p_w_b & 0x0f;
 }

 static inline int pucan_status_is_rx_barrier(const struct pucan_status_msg *msg)
 {
 	return msg->channel_p_w_b & PUCAN_RX_BARRIER;
 }

 static inline int pucan_status_is_passive(const struct pucan_status_msg *msg)
 {
 	return msg->channel_p_w_b & PUCAN_BUS_PASSIVE;
 }

 static inline int pucan_status_is_warning(const struct pucan_status_msg *msg)
 {
 	return msg->channel_p_w_b & PUCAN_BUS_WARNING;
 }

 static inline int pucan_status_is_busoff(const struct pucan_status_msg *msg)
 {
 	return msg->channel_p_w_b & PUCAN_BUS_BUSOFF;
 }

 /* uCAN transmitted message format */
 #define PUCAN_MSG_CHANNEL_DLC(c, d)	(((c) & 0xf) | ((d) << 4))

 struct __packed pucan_tx_msg {
 	__le16	size;
 	__le16	type;
 	__le32	tag_low;
 	__le32	tag_high;
 	u8	channel_dlc;
 	u8	client;
 	__le16	flags;
 	__le32	can_id;
 	u8	d[0];
 };

 /* build the cmd opcode_channel field with respect to the correct endianness */
 static inline __le16 pucan_cmd_opcode_channel(int index, int opcode)
 {
 	return cpu_to_le16(((index) << 12) | ((opcode) & 0x3ff));
 }

 /* return the channel number part from any received message channel_dlc field */
 static inline int pucan_msg_get_channel(const struct pucan_rx_msg *msg)
 {
 	return msg->channel_dlc & 0xf;
 }

 /* return the dlc value from any received message channel_dlc field */
 static inline int pucan_msg_get_dlc(const struct pucan_rx_msg *msg)
 {
 	return msg->channel_dlc >> 4;
 }

 static inline int pucan_ermsg_get_channel(const struct pucan_error_msg *msg)
 {
 	return msg->channel_type_d & 0x0f;
 }

 static inline int pucan_stmsg_get_channel(const struct pucan_status_msg *msg)
 {
 	return msg->channel_p_w_b & 0x0f;
 }

 #endif
	/*
	* CAN driver for PEAK System micro-CAN based adapters
	*
	* Copyright (C) 2003-2011 PEAK System-Technik GmbH
	* Copyright (C) 2011-2013 Stephane Grosjean <s.grosjean@peak-system.com>
	*
	* This program is free software; you can redistribute it and/or modify it
	* under the terms of the GNU General Public License as published
	* by the Free Software Foundation; version 2 of the License.
	*
	* This program is distributed in the hope that 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 PUCAN_H
	#define PUCAN_H

	/* uCAN commands opcodes list (low-order 10 bits) */
	#define PUCAN_CMD_NOP 0x000
	#define PUCAN_CMD_RESET_MODE 0x001
	#define PUCAN_CMD_NORMAL_MODE 0x002
	#define PUCAN_CMD_LISTEN_ONLY_MODE 0x003
	#define PUCAN_CMD_TIMING_SLOW 0x004
	#define PUCAN_CMD_TIMING_FAST 0x005
	#define PUCAN_CMD_SET_STD_FILTER 0x006
	#define PUCAN_CMD_RESERVED2 0x007
	#define PUCAN_CMD_FILTER_STD 0x008
	#define PUCAN_CMD_TX_ABORT 0x009
	#define PUCAN_CMD_WR_ERR_CNT 0x00a
	#define PUCAN_CMD_SET_EN_OPTION 0x00b
	#define PUCAN_CMD_CLR_DIS_OPTION 0x00c
	#define PUCAN_CMD_RX_BARRIER 0x010
	#define PUCAN_CMD_END_OF_COLLECTION 0x3ff

	/* uCAN received messages list */
	#define PUCAN_MSG_CAN_RX 0x0001
	#define PUCAN_MSG_ERROR 0x0002
	#define PUCAN_MSG_STATUS 0x0003
	#define PUCAN_MSG_BUSLOAD 0x0004

	#define PUCAN_MSG_CACHE_CRITICAL 0x0102

	/* uCAN transmitted messages */
	#define PUCAN_MSG_CAN_TX 0x1000

	/* uCAN command common header */
	struct __packed pucan_command {
	__le16 opcode_channel;
	u16 args[3];
	};

	/* return the opcode from the opcode_channel field of a command */
	static inline u16 pucan_cmd_get_opcode(struct pucan_command *c)
	{
	return le16_to_cpu(c->opcode_channel) & 0x3ff;
	}

	#define PUCAN_TSLOW_BRP_BITS 10
	#define PUCAN_TSLOW_TSGEG1_BITS 8
	#define PUCAN_TSLOW_TSGEG2_BITS 7
	#define PUCAN_TSLOW_SJW_BITS 7

	#define PUCAN_TSLOW_BRP_MASK ((1 << PUCAN_TSLOW_BRP_BITS) - 1)
	#define PUCAN_TSLOW_TSEG1_MASK ((1 << PUCAN_TSLOW_TSGEG1_BITS) - 1)
	#define PUCAN_TSLOW_TSEG2_MASK ((1 << PUCAN_TSLOW_TSGEG2_BITS) - 1)
	#define PUCAN_TSLOW_SJW_MASK ((1 << PUCAN_TSLOW_SJW_BITS) - 1)

	/* uCAN TIMING_SLOW command fields */
	#define PUCAN_TSLOW_SJW_T(s, t) (((s) & PUCAN_TSLOW_SJW_MASK) \| \
	((!!(t)) << 7))
	#define PUCAN_TSLOW_TSEG2(t) ((t) & PUCAN_TSLOW_TSEG2_MASK)
	#define PUCAN_TSLOW_TSEG1(t) ((t) & PUCAN_TSLOW_TSEG1_MASK)
	#define PUCAN_TSLOW_BRP(b) ((b) & PUCAN_TSLOW_BRP_MASK)

	struct __packed pucan_timing_slow {
	__le16 opcode_channel;

	u8 ewl; /* Error Warning limit */
	u8 sjw_t; /* Sync Jump Width + Triple sampling */
	u8 tseg2; /* Timing SEGment 2 */
	u8 tseg1; /* Timing SEGment 1 */

	__le16 brp; /* BaudRate Prescaler */
	};

	#define PUCAN_TFAST_BRP_BITS 10
	#define PUCAN_TFAST_TSGEG1_BITS 5
	#define PUCAN_TFAST_TSGEG2_BITS 4
	#define PUCAN_TFAST_SJW_BITS 4

	#define PUCAN_TFAST_BRP_MASK ((1 << PUCAN_TFAST_BRP_BITS) - 1)
	#define PUCAN_TFAST_TSEG1_MASK ((1 << PUCAN_TFAST_TSGEG1_BITS) - 1)
	#define PUCAN_TFAST_TSEG2_MASK ((1 << PUCAN_TFAST_TSGEG2_BITS) - 1)
	#define PUCAN_TFAST_SJW_MASK ((1 << PUCAN_TFAST_SJW_BITS) - 1)

	/* uCAN TIMING_FAST command fields */
	#define PUCAN_TFAST_SJW(s) ((s) & PUCAN_TFAST_SJW_MASK)
	#define PUCAN_TFAST_TSEG2(t) ((t) & PUCAN_TFAST_TSEG2_MASK)
	#define PUCAN_TFAST_TSEG1(t) ((t) & PUCAN_TFAST_TSEG1_MASK)
	#define PUCAN_TFAST_BRP(b) ((b) & PUCAN_TFAST_BRP_MASK)

	struct __packed pucan_timing_fast {
	__le16 opcode_channel;

	u8 unused;
	u8 sjw; /* Sync Jump Width */
	u8 tseg2; /* Timing SEGment 2 */
	u8 tseg1; /* Timing SEGment 1 */

	__le16 brp; /* BaudRate Prescaler */
	};

	/* uCAN FILTER_STD command fields */
	#define PUCAN_FLTSTD_ROW_IDX_BITS 6

	struct __packed pucan_filter_std {
	__le16 opcode_channel;

	__le16 idx;
	__le32 mask; /* CAN-ID bitmask in idx range */
	};

	#define PUCAN_FLTSTD_ROW_IDX_MAX ((1 << PUCAN_FLTSTD_ROW_IDX_BITS) - 1)

	/* uCAN SET_STD_FILTER command fields */
	struct __packed pucan_std_filter {
	__le16 opcode_channel;

	u8 unused;
	u8 idx;
	__le32 mask; /* CAN-ID bitmask in idx range */
	};

	/* uCAN TX_ABORT commands fields */
	#define PUCAN_TX_ABORT_FLUSH 0x0001

	struct __packed pucan_tx_abort {
	__le16 opcode_channel;

	__le16 flags;
	u32 unused;
	};

	/* uCAN WR_ERR_CNT command fields */
	#define PUCAN_WRERRCNT_TE 0x4000 /* Tx error cntr write Enable */
	#define PUCAN_WRERRCNT_RE 0x8000 /* Rx error cntr write Enable */

	struct __packed pucan_wr_err_cnt {
	__le16 opcode_channel;

	__le16 sel_mask;
	u8 tx_counter; /* Tx error counter new value */
	u8 rx_counter; /* Rx error counter new value */

	u16 unused;
	};

	/* uCAN SET_EN/CLR_DIS _OPTION command fields */
	#define PUCAN_OPTION_ERROR 0x0001
	#define PUCAN_OPTION_BUSLOAD 0x0002
	#define PUCAN_OPTION_CANDFDISO 0x0004

	struct __packed pucan_options {
	__le16 opcode_channel;

	__le16 options;
	u32 unused;
	};

	/* uCAN received messages global format */
	struct __packed pucan_msg {
	__le16 size;
	__le16 type;
	__le32 ts_low;
	__le32 ts_high;
	};

	/* uCAN flags for CAN/CANFD messages */
	#define PUCAN_MSG_SELF_RECEIVE 0x80
	#define PUCAN_MSG_ERROR_STATE_IND 0x40 /* error state indicator */
	#define PUCAN_MSG_BITRATE_SWITCH 0x20 /* bitrate switch */
	#define PUCAN_MSG_EXT_DATA_LEN 0x10 /* extended data length */
	#define PUCAN_MSG_SINGLE_SHOT 0x08
	#define PUCAN_MSG_LOOPED_BACK 0x04
	#define PUCAN_MSG_EXT_ID 0x02
	#define PUCAN_MSG_RTR 0x01

	struct __packed pucan_rx_msg {
	__le16 size;
	__le16 type;
	__le32 ts_low;
	__le32 ts_high;
	__le32 tag_low;
	__le32 tag_high;
	u8 channel_dlc;
	u8 client;
	__le16 flags;
	__le32 can_id;
	u8 d[0];
	};

	/* uCAN error types */
	#define PUCAN_ERMSG_BIT_ERROR 0
	#define PUCAN_ERMSG_FORM_ERROR 1
	#define PUCAN_ERMSG_STUFF_ERROR 2
	#define PUCAN_ERMSG_OTHER_ERROR 3
	#define PUCAN_ERMSG_ERR_CNT_DEC 4

	struct __packed pucan_error_msg {
	__le16 size;
	__le16 type;
	__le32 ts_low;
	__le32 ts_high;
	u8 channel_type_d;
	u8 code_g;
	u8 tx_err_cnt;
	u8 rx_err_cnt;
	};

	static inline int pucan_error_get_channel(const struct pucan_error_msg *msg)
	{
	return msg->channel_type_d & 0x0f;
	}

	#define PUCAN_RX_BARRIER 0x10
	#define PUCAN_BUS_PASSIVE 0x20
	#define PUCAN_BUS_WARNING 0x40
	#define PUCAN_BUS_BUSOFF 0x80

	struct __packed pucan_status_msg {
	__le16 size;
	__le16 type;
	__le32 ts_low;
	__le32 ts_high;
	u8 channel_p_w_b;
	u8 unused[3];
	};

	static inline int pucan_status_get_channel(const struct pucan_status_msg *msg)
	{
	return msg->channel_p_w_b & 0x0f;
	}

	static inline int pucan_status_is_rx_barrier(const struct pucan_status_msg *msg)
	{
	return msg->channel_p_w_b & PUCAN_RX_BARRIER;
	}

	static inline int pucan_status_is_passive(const struct pucan_status_msg *msg)
	{
	return msg->channel_p_w_b & PUCAN_BUS_PASSIVE;
	}

	static inline int pucan_status_is_warning(const struct pucan_status_msg *msg)
	{
	return msg->channel_p_w_b & PUCAN_BUS_WARNING;
	}

	static inline int pucan_status_is_busoff(const struct pucan_status_msg *msg)
	{
	return msg->channel_p_w_b & PUCAN_BUS_BUSOFF;
	}

	/* uCAN transmitted message format */
	#define PUCAN_MSG_CHANNEL_DLC(c, d) (((c) & 0xf) \| ((d) << 4))

	struct __packed pucan_tx_msg {
	__le16 size;
	__le16 type;
	__le32 tag_low;
	__le32 tag_high;
	u8 channel_dlc;
	u8 client;
	__le16 flags;
	__le32 can_id;
	u8 d[0];
	};

	/* build the cmd opcode_channel field with respect to the correct endianness */
	static inline __le16 pucan_cmd_opcode_channel(int index, int opcode)
	{
	return cpu_to_le16(((index) << 12) \| ((opcode) & 0x3ff));
	}

	/* return the channel number part from any received message channel_dlc field */
	static inline int pucan_msg_get_channel(const struct pucan_rx_msg *msg)
	{
	return msg->channel_dlc & 0xf;
	}

	/* return the dlc value from any received message channel_dlc field */
	static inline int pucan_msg_get_dlc(const struct pucan_rx_msg *msg)
	{
	return msg->channel_dlc >> 4;
	}

	static inline int pucan_ermsg_get_channel(const struct pucan_error_msg *msg)
	{
	return msg->channel_type_d & 0x0f;
	}

	static inline int pucan_stmsg_get_channel(const struct pucan_status_msg *msg)
	{
	return msg->channel_p_w_b & 0x0f;
	}

	#endif