/*
 * Freescale Layerscape MC I/O wrapper
 *
 * Copyright (C) 2015 Freescale Semiconductor, Inc.
 * Author: Prabhakar Kushwaha <prabhakar@freescale.com>
 *
 * SPDX-License-Identifier:	GPL-2.0+
 */

#ifndef __FSL_DPMAC_H
#define __FSL_DPMAC_H

/* DPMAC Version */
#define DPMAC_VER_MAJOR				3
#define DPMAC_VER_MINOR				2

/* Command IDs */
#define DPMAC_CMDID_CLOSE			0x800
#define DPMAC_CMDID_OPEN			0x80c
#define DPMAC_CMDID_CREATE			0x90c
#define DPMAC_CMDID_DESTROY			0x900

#define DPMAC_CMDID_GET_ATTR			0x004
#define DPMAC_CMDID_RESET			0x005

#define DPMAC_CMDID_MDIO_READ			0x0c0
#define DPMAC_CMDID_MDIO_WRITE			0x0c1
#define DPMAC_CMDID_GET_LINK_CFG		0x0c2
#define DPMAC_CMDID_SET_LINK_STATE		0x0c3
#define DPMAC_CMDID_GET_COUNTER			0x0c4

/*                cmd, param, offset, width, type, arg_name */
#define DPMAC_CMD_CREATE(cmd, cfg) \
	MC_CMD_OP(cmd, 0, 0,  32, int,      cfg->mac_id)

/*                cmd, param, offset, width, type, arg_name */
#define DPMAC_CMD_OPEN(cmd, dpmac_id) \
	MC_CMD_OP(cmd, 0, 0,  32, int,	    dpmac_id)

/*                cmd, param, offset, width, type,	arg_name */
#define DPMAC_RSP_GET_ATTRIBUTES(cmd, attr) \
do { \
	MC_RSP_OP(cmd, 0, 0,  32, int,			attr->phy_id);\
	MC_RSP_OP(cmd, 0, 32, 32, int,			attr->id);\
	MC_RSP_OP(cmd, 1, 0,  16, uint16_t,		attr->version.major);\
	MC_RSP_OP(cmd, 1, 16, 16, uint16_t,		attr->version.minor);\
	MC_RSP_OP(cmd, 1, 32,  8, enum dpmac_link_type,	attr->link_type);\
	MC_RSP_OP(cmd, 1, 40,  8, enum dpmac_eth_if,	attr->eth_if);\
	MC_RSP_OP(cmd, 2, 0,  32, uint32_t,		attr->max_rate);\
} while (0)

/*                cmd, param, offset, width, type, arg_name */
#define DPMAC_CMD_MDIO_READ(cmd, cfg) \
do { \
	MC_CMD_OP(cmd, 0, 0,  8,  uint8_t,  cfg->phy_addr); \
	MC_CMD_OP(cmd, 0, 8,  8,  uint8_t,  cfg->reg); \
} while (0)

/*                cmd, param, offset, width, type, arg_name */
#define DPMAC_RSP_MDIO_READ(cmd, data) \
	MC_RSP_OP(cmd, 0, 16, 16, uint16_t, data)

/*                cmd, param, offset, width, type, arg_name */
#define DPMAC_CMD_MDIO_WRITE(cmd, cfg) \
do { \
	MC_CMD_OP(cmd, 0, 0,  8,  uint8_t,  cfg->phy_addr); \
	MC_CMD_OP(cmd, 0, 8,  8,  uint8_t,  cfg->reg); \
	MC_CMD_OP(cmd, 0, 16, 16, uint16_t, cfg->data); \
} while (0)

/*                cmd, param, offset, width, type, arg_name */
#define DPMAC_RSP_GET_LINK_CFG(cmd, cfg) \
do { \
	MC_RSP_OP(cmd, 0, 0,  64, uint64_t, cfg->options); \
	MC_RSP_OP(cmd, 1, 0,  32, uint32_t, cfg->rate); \
} while (0)

/*                cmd, param, offset, width, type, arg_name */
#define DPMAC_CMD_SET_LINK_STATE(cmd, cfg) \
do { \
	MC_CMD_OP(cmd, 0, 0,  64, uint64_t, cfg->options); \
	MC_CMD_OP(cmd, 1, 0,  32, uint32_t, cfg->rate); \
	MC_CMD_OP(cmd, 2, 0,  1,  int,      cfg->up); \
} while (0)

/*                cmd, param, offset, width, type, arg_name */
#define DPMAC_CMD_GET_COUNTER(cmd, type) \
	MC_CMD_OP(cmd, 0, 0,  8, enum dpmac_counter, type)

/*                cmd, param, offset, width, type, arg_name */
#define DPMAC_RSP_GET_COUNTER(cmd, counter) \
	MC_RSP_OP(cmd, 1, 0, 64, uint64_t, counter)

/* Data Path MAC API
 * Contains initialization APIs and runtime control APIs for DPMAC
 */

struct fsl_mc_io;

/**
 * dpmac_open() - Open a control session for the specified object.
 * @mc_io:	Pointer to MC portal's I/O object
 * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
 * @dpmac_id:	DPMAC unique ID
 * @token:	Returned token; use in subsequent API calls
 *
 * This function can be used to open a control session for an
 * already created object; an object may have been declared in
 * the DPL or by calling the dpmac_create function.
 * This function returns a unique authentication token,
 * associated with the specific object ID and the specific MC
 * portal; this token must be used in all subsequent commands for
 * this specific object
 *
 * Return:	'0' on Success; Error code otherwise.
 */
int dpmac_open(struct fsl_mc_io	*mc_io,
	       uint32_t		cmd_flags,
	       int			dpmac_id,
	       uint16_t		*token);

/**
 * dpmac_close() - Close the control session of the object
 * @mc_io:	Pointer to MC portal's I/O object
 * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
 * @token:	Token of DPMAC object
 *
 * After this function is called, no further operations are
 * allowed on the object without opening a new control session.
 *
 * Return:	'0' on Success; Error code otherwise.
 */
int dpmac_close(struct fsl_mc_io	*mc_io,
		uint32_t		cmd_flags,
		uint16_t		token);

/**
 * enum dpmac_link_type -  DPMAC link type
 * @DPMAC_LINK_TYPE_NONE: No link
 * @DPMAC_LINK_TYPE_FIXED: Link is fixed type
 * @DPMAC_LINK_TYPE_PHY: Link by PHY ID
 * @DPMAC_LINK_TYPE_BACKPLANE: Backplane link type
 */
enum dpmac_link_type {
	DPMAC_LINK_TYPE_NONE,
	DPMAC_LINK_TYPE_FIXED,
	DPMAC_LINK_TYPE_PHY,
	DPMAC_LINK_TYPE_BACKPLANE
};

/**
 * enum dpmac_eth_if - DPMAC Ethrnet interface
 * @DPMAC_ETH_IF_MII: MII interface
 * @DPMAC_ETH_IF_RMII: RMII interface
 * @DPMAC_ETH_IF_SMII: SMII interface
 * @DPMAC_ETH_IF_GMII: GMII interface
 * @DPMAC_ETH_IF_RGMII: RGMII interface
 * @DPMAC_ETH_IF_SGMII: SGMII interface
 * @DPMAC_ETH_IF_QSGMII: QSGMII interface
 * @DPMAC_ETH_IF_XAUI: XAUI interface
 * @DPMAC_ETH_IF_XFI: XFI interface
 */
enum dpmac_eth_if {
	DPMAC_ETH_IF_MII,
	DPMAC_ETH_IF_RMII,
	DPMAC_ETH_IF_SMII,
	DPMAC_ETH_IF_GMII,
	DPMAC_ETH_IF_RGMII,
	DPMAC_ETH_IF_SGMII,
	DPMAC_ETH_IF_QSGMII,
	DPMAC_ETH_IF_XAUI,
	DPMAC_ETH_IF_XFI
};

/**
 * struct dpmac_cfg - Structure representing DPMAC configuration
 * @mac_id:	Represents the Hardware MAC ID; in case of multiple WRIOP,
 *		the MAC IDs are continuous.
 *		For example:  2 WRIOPs, 16 MACs in each:
 *				MAC IDs for the 1st WRIOP: 1-16,
 *				MAC IDs for the 2nd WRIOP: 17-32.
 */
struct dpmac_cfg {
	int mac_id;
};

/**
 * dpmac_create() - Create the DPMAC object.
 * @mc_io:	Pointer to MC portal's I/O object
 * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
 * @cfg:	Configuration structure
 * @token:	Returned token; use in subsequent API calls
 *
 * Create the DPMAC object, allocate required resources and
 * perform required initialization.
 *
 * The object can be created either by declaring it in the
 * DPL file, or by calling this function.
 * This function returns a unique authentication token,
 * associated with the specific object ID and the specific MC
 * portal; this token must be used in all subsequent calls to
 * this specific object. For objects that are created using the
 * DPL file, call dpmac_open function to get an authentication
 * token first.
 *
 * Return:	'0' on Success; Error code otherwise.
 */
int dpmac_create(struct fsl_mc_io	*mc_io,
		 uint32_t		cmd_flags,
		 const struct dpmac_cfg	*cfg,
		 uint16_t		*token);

/**
 * dpmac_destroy() - Destroy the DPMAC object and release all its resources.
 * @mc_io:	Pointer to MC portal's I/O object
 * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
 * @token:	Token of DPMAC object
 *
 * Return:	'0' on Success; error code otherwise.
 */
int dpmac_destroy(struct fsl_mc_io	*mc_io,
		  uint32_t		cmd_flags,
		  uint16_t		token);

/* DPMAC IRQ Index and Events */

/* IRQ index */
#define DPMAC_IRQ_INDEX						0
/* IRQ event - indicates a change in link state */
#define DPMAC_IRQ_EVENT_LINK_CFG_REQ		0x00000001
/* irq event - Indicates that the link state changed */
#define DPMAC_IRQ_EVENT_LINK_CHANGED		0x00000002

/**
 * struct dpmac_attr - Structure representing DPMAC attributes
 * @id:		DPMAC object ID
 * @phy_id:	PHY ID
 * @link_type: link type
 * @eth_if: Ethernet interface
 * @max_rate: Maximum supported rate - in Mbps
 * @version:	DPMAC version
 */
struct dpmac_attr {
	int			id;
	int			phy_id;
	enum dpmac_link_type	link_type;
	enum dpmac_eth_if	eth_if;
	uint32_t		max_rate;
	/**
	 * struct version - Structure representing DPMAC version
	 * @major:	DPMAC major version
	 * @minor:	DPMAC minor version
	 */
	struct {
		uint16_t major;
		uint16_t minor;
	} version;
};

/**
 * dpmac_get_attributes - Retrieve DPMAC attributes.
 *
 * @mc_io:	Pointer to MC portal's I/O object
 * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
 * @token:	Token of DPMAC object
 * @attr:	Returned object's attributes
 *
 * Return:	'0' on Success; Error code otherwise.
 */
int dpmac_get_attributes(struct fsl_mc_io	*mc_io,
			 uint32_t		cmd_flags,
			 uint16_t		token,
			 struct dpmac_attr	*attr);

/**
 * struct dpmac_mdio_cfg - DPMAC MDIO read/write parameters
 * @phy_addr: MDIO device address
 * @reg: Address of the register within the Clause 45 PHY device from which data
 *	is to be read
 * @data: Data read/write from/to MDIO
 */
struct dpmac_mdio_cfg {
	uint8_t		phy_addr;
	uint8_t		reg;
	uint16_t	data;
};

/**
 * dpmac_mdio_read() - Perform MDIO read transaction
 * @mc_io:	Pointer to opaque I/O object
 * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
 * @token:	Token of DPMAC object
 * @cfg:	Structure with MDIO transaction parameters
 *
 * Return:	'0' on Success; Error code otherwise.
 */
int dpmac_mdio_read(struct fsl_mc_io		*mc_io,
		    uint32_t			cmd_flags,
		    uint16_t			token,
		    struct dpmac_mdio_cfg	*cfg);

/**
 * dpmac_mdio_write() - Perform MDIO write transaction
 * @mc_io:	Pointer to opaque I/O object
 * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
 * @token:	Token of DPMAC object
 * @cfg:	Structure with MDIO transaction parameters
 *
 * Return:	'0' on Success; Error code otherwise.
 */
int dpmac_mdio_write(struct fsl_mc_io		*mc_io,
		     uint32_t			cmd_flags,
		     uint16_t			token,
		     struct dpmac_mdio_cfg	*cfg);

/* DPMAC link configuration/state options */

/* Enable auto-negotiation */
#define DPMAC_LINK_OPT_AUTONEG		0x0000000000000001ULL
/* Enable half-duplex mode */
#define DPMAC_LINK_OPT_HALF_DUPLEX	0x0000000000000002ULL
/* Enable pause frames */
#define DPMAC_LINK_OPT_PAUSE		0x0000000000000004ULL
/* Enable a-symmetric pause frames */
#define DPMAC_LINK_OPT_ASYM_PAUSE	0x0000000000000008ULL

/**
 * struct dpmac_link_cfg - Structure representing DPMAC link configuration
 * @rate: Link's rate - in Mbps
 * @options: Enable/Disable DPMAC link cfg features (bitmap)
 */
struct dpmac_link_cfg {
	uint32_t rate;
	uint64_t options;
};

/**
 * dpmac_get_link_cfg() - Get Ethernet link configuration
 * @mc_io:	Pointer to opaque I/O object
 * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
 * @token:	Token of DPMAC object
 * @cfg:	Returned structure with the link configuration
 *
 * Return:	'0' on Success; Error code otherwise.
 */
int dpmac_get_link_cfg(struct fsl_mc_io	*mc_io,
		       uint32_t		cmd_flags,
		       uint16_t		token,
		       struct dpmac_link_cfg	*cfg);

/**
 * struct dpmac_link_state - DPMAC link configuration request
 * @rate: Rate in Mbps
 * @options: Enable/Disable DPMAC link cfg features (bitmap)
 * @up: Link state
 */
struct dpmac_link_state {
	uint32_t	rate;
	uint64_t	options;
	int		up;
};

/**
 * dpmac_set_link_state() - Set the Ethernet link status
 * @mc_io:	Pointer to opaque I/O object
 * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
 * @token:	Token of DPMAC object
 * @link_state:	Link state configuration
 *
 * Return:	'0' on Success; Error code otherwise.
 */
int dpmac_set_link_state(struct fsl_mc_io		*mc_io,
			 uint32_t			cmd_flags,
			 uint16_t			token,
			 struct dpmac_link_state	*link_state);

/**
 * enum dpni_counter - DPNI counter types
 * @DPMAC_CNT_ING_FRAME_64: counts 64-octet frame, good or bad.
 * @DPMAC_CNT_ING_FRAME_127: counts 65- to 127-octet frame, good or bad.
 * @DPMAC_CNT_ING_FRAME_255: counts 128- to 255-octet frame, good or bad.
 * @DPMAC_CNT_ING_FRAME_511: counts 256- to 511-octet frame, good or bad.
 * @DPMAC_CNT_ING_FRAME_1023: counts 512- to 1023-octet frame, good or bad.
 * @DPMAC_CNT_ING_FRAME_1518: counts 1024- to 1518-octet frame, good or bad.
 * @DPMAC_CNT_ING_FRAME_1519_MAX: counts 1519-octet frame and larger
 *				  (up to max frame length specified),
 *				  good or bad.
 * @DPMAC_CNT_ING_FRAG: counts packet which is shorter than 64 octets received
 *			with a wrong CRC
 * @DPMAC_CNT_ING_JABBER: counts packet longer than the maximum frame length
 *			  specified, with a bad frame check sequence.
 * @DPMAC_CNT_ING_FRAME_DISCARD: counts dropped packet due to internal errors.
 *				 Occurs when a receive FIFO overflows.
 *				 Includes also packets truncated as a result of
 *				 the receive FIFO overflow.
 * @DPMAC_CNT_ING_ALIGN_ERR: counts frame with an alignment error
 *			     (optional used for wrong SFD)
 * @DPMAC_CNT_EGR_UNDERSIZED: counts packet transmitted that was less than 64
 *			      octets long with a good CRC.
 * @DPMAC_CNT_ING_OVERSIZED: counts packet longer than the maximum frame length
 *			     specified, with a good frame check sequence.
 * @DPMAC_CNT_ING_VALID_PAUSE_FRAME: counts valid pause frame (regular and PFC).
 * @DPMAC_CNT_EGR_VALID_PAUSE_FRAME: counts valid pause frame transmitted
 *				     (regular and PFC).
 * @DPMAC_CNT_ING_BYTE: counts octet received except preamble for all valid
 *				frames and valid pause frames.
 * @DPMAC_CNT_ING_MCAST_FRAME: counts received multicast frame
 * @DPMAC_CNT_ING_BCAST_FRAME: counts received broadcast frame
 * @DPMAC_CNT_ING_ALL_FRAME: counts each good or bad packet received.
 * @DPMAC_CNT_ING_UCAST_FRAME: counts received unicast frame
 * @DPMAC_CNT_ING_ERR_FRAME: counts frame received with an error
 *			     (except for undersized/fragment frame)
 * @DPMAC_CNT_EGR_BYTE: counts octet transmitted except preamble for all valid
 *			frames and valid pause frames transmitted.
 * @DPMAC_CNT_EGR_MCAST_FRAME: counts transmitted multicast frame
 * @DPMAC_CNT_EGR_BCAST_FRAME: counts transmitted broadcast frame
 * @DPMAC_CNT_EGR_UCAST_FRAME: counts transmitted unicast frame
 * @DPMAC_CNT_EGR_ERR_FRAME: counts frame transmitted with an error
 * @DPMAC_CNT_ING_GOOD_FRAME: counts frame received without error, including
 *			      pause frames.
 */
enum dpmac_counter {
	DPMAC_CNT_ING_FRAME_64,
	DPMAC_CNT_ING_FRAME_127,
	DPMAC_CNT_ING_FRAME_255,
	DPMAC_CNT_ING_FRAME_511,
	DPMAC_CNT_ING_FRAME_1023,
	DPMAC_CNT_ING_FRAME_1518,
	DPMAC_CNT_ING_FRAME_1519_MAX,
	DPMAC_CNT_ING_FRAG,
	DPMAC_CNT_ING_JABBER,
	DPMAC_CNT_ING_FRAME_DISCARD,
	DPMAC_CNT_ING_ALIGN_ERR,
	DPMAC_CNT_EGR_UNDERSIZED,
	DPMAC_CNT_ING_OVERSIZED,
	DPMAC_CNT_ING_VALID_PAUSE_FRAME,
	DPMAC_CNT_EGR_VALID_PAUSE_FRAME,
	DPMAC_CNT_ING_BYTE,
	DPMAC_CNT_ING_MCAST_FRAME,
	DPMAC_CNT_ING_BCAST_FRAME,
	DPMAC_CNT_ING_ALL_FRAME,
	DPMAC_CNT_ING_UCAST_FRAME,
	DPMAC_CNT_ING_ERR_FRAME,
	DPMAC_CNT_EGR_BYTE,
	DPMAC_CNT_EGR_MCAST_FRAME,
	DPMAC_CNT_EGR_BCAST_FRAME,
	DPMAC_CNT_EGR_UCAST_FRAME,
	DPMAC_CNT_EGR_ERR_FRAME,
	DPMAC_CNT_ING_GOOD_FRAME
};

/**
 * dpmac_get_counter() - Read a specific DPMAC counter
 * @mc_io:	Pointer to opaque I/O object
 * @cmd_flags:	Command flags; one or more of 'MC_CMD_FLAG_'
 * @token:	Token of DPMAC object
 * @type:	The requested counter
 * @counter:	Returned counter value
 *
 * Return:	The requested counter; '0' otherwise.
 */
int dpmac_get_counter(struct fsl_mc_io		*mc_io,
		      uint32_t			cmd_flags,
		      uint16_t			token,
		      enum dpmac_counter	 type,
		      uint64_t			*counter);

#endif /* __FSL_DPMAC_H */