/*-
 * SPDX-License-Identifier: BSD-4-Clause
 *
 * Copyright (c) 1997, 1998, 1999, 2000-2003
 *	Bill Paul <wpaul@windriver.com>.  All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by Bill Paul.
 * 4. Neither the name of the author nor the names of any co-contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY Bill Paul AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL Bill Paul OR THE VOICES IN HIS HEAD
 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
 * THE POSSIBILITY OF SUCH DAMAGE.
 *
 * $FreeBSD$
 */

/*
 * Definitions for the ASIX Electronics AX88172, AX88178
 * and AX88772 to ethernet controllers.
 */

/*
 * Vendor specific commands.  ASIX conveniently doesn't document the 'set
 * NODEID' command in their datasheet (thanks a lot guys).
 * To make handling these commands easier, I added some extra data which is
 * decided by the axe_cmd() routine. Commands are encoded in 16 bits, with
 * the format: LDCC. L and D are both nibbles in the high byte.  L represents
 * the data length (0 to 15) and D represents the direction (0 for vendor read,
 * 1 for vendor write).  CC is the command byte, as specified in the manual.
 */

#define	AXE_CMD_IS_WRITE(x)	(((x) & 0x0F00) >> 8)
#define	AXE_CMD_LEN(x)		(((x) & 0xF000) >> 12)
#define	AXE_CMD_CMD(x)		((x) & 0x00FF)

#define	AXE_172_CMD_READ_RXTX_SRAM		0x2002
#define	AXE_182_CMD_READ_RXTX_SRAM		0x8002
#define	AXE_172_CMD_WRITE_RX_SRAM		0x0103
#define	AXE_182_CMD_WRITE_RXTX_SRAM		0x8103
#define	AXE_172_CMD_WRITE_TX_SRAM		0x0104
#define	AXE_CMD_MII_OPMODE_SW			0x0106
#define	AXE_CMD_MII_READ_REG			0x2007
#define	AXE_CMD_MII_WRITE_REG			0x2108
#define	AXE_CMD_MII_READ_OPMODE			0x1009
#define	AXE_CMD_MII_OPMODE_HW			0x010A
#define	AXE_CMD_SROM_READ			0x200B
#define	AXE_CMD_SROM_WRITE			0x010C
#define	AXE_CMD_SROM_WR_ENABLE			0x010D
#define	AXE_CMD_SROM_WR_DISABLE			0x010E
#define	AXE_CMD_RXCTL_READ			0x200F
#define	AXE_CMD_RXCTL_WRITE			0x0110
#define	AXE_CMD_READ_IPG012			0x3011
#define	AXE_172_CMD_WRITE_IPG0			0x0112
#define	AXE_178_CMD_WRITE_IPG012		0x0112
#define	AXE_172_CMD_WRITE_IPG1			0x0113
#define	AXE_178_CMD_READ_NODEID			0x6013
#define	AXE_172_CMD_WRITE_IPG2			0x0114
#define	AXE_178_CMD_WRITE_NODEID		0x6114
#define	AXE_CMD_READ_MCAST			0x8015
#define	AXE_CMD_WRITE_MCAST			0x8116
#define	AXE_172_CMD_READ_NODEID			0x6017
#define	AXE_172_CMD_WRITE_NODEID		0x6118

#define	AXE_CMD_READ_PHYID			0x2019
#define	AXE_172_CMD_READ_MEDIA			0x101A
#define	AXE_178_CMD_READ_MEDIA			0x201A
#define	AXE_CMD_WRITE_MEDIA			0x011B
#define	AXE_CMD_READ_MONITOR_MODE		0x101C
#define	AXE_CMD_WRITE_MONITOR_MODE		0x011D
#define	AXE_CMD_READ_GPIO			0x101E
#define	AXE_CMD_WRITE_GPIO			0x011F

#define	AXE_CMD_SW_RESET_REG			0x0120
#define	AXE_CMD_SW_PHY_STATUS			0x0021
#define	AXE_CMD_SW_PHY_SELECT			0x0122

/* AX88772A and AX88772B only. */
#define	AXE_CMD_READ_VLAN_CTRL			0x4027
#define	AXE_CMD_WRITE_VLAN_CTRL			0x4028

#define	AXE_772B_CMD_RXCTL_WRITE_CFG		0x012A
#define	AXE_772B_CMD_READ_RXCSUM		0x002B
#define	AXE_772B_CMD_WRITE_RXCSUM		0x012C
#define	AXE_772B_CMD_READ_TXCSUM		0x002D
#define	AXE_772B_CMD_WRITE_TXCSUM		0x012E

#define	AXE_SW_RESET_CLEAR			0x00
#define	AXE_SW_RESET_RR				0x01
#define	AXE_SW_RESET_RT				0x02
#define	AXE_SW_RESET_PRTE			0x04
#define	AXE_SW_RESET_PRL			0x08
#define	AXE_SW_RESET_BZ				0x10
#define	AXE_SW_RESET_IPRL			0x20
#define	AXE_SW_RESET_IPPD			0x40

/* AX88178 documentation says to always write this bit... */
#define	AXE_178_RESET_MAGIC			0x40

#define	AXE_178_MEDIA_GMII			0x0001
#define	AXE_MEDIA_FULL_DUPLEX			0x0002
#define	AXE_172_MEDIA_TX_ABORT_ALLOW		0x0004

/* AX88178/88772 documentation says to always write 1 to bit 2 */
#define	AXE_178_MEDIA_MAGIC			0x0004
/* AX88772 documentation says to always write 0 to bit 3 */
#define	AXE_178_MEDIA_ENCK			0x0008
#define	AXE_172_MEDIA_FLOW_CONTROL_EN		0x0010
#define	AXE_178_MEDIA_RXFLOW_CONTROL_EN		0x0010
#define	AXE_178_MEDIA_TXFLOW_CONTROL_EN		0x0020
#define	AXE_178_MEDIA_JUMBO_EN			0x0040
#define	AXE_178_MEDIA_LTPF_ONLY			0x0080
#define	AXE_178_MEDIA_RX_EN			0x0100
#define	AXE_178_MEDIA_100TX			0x0200
#define	AXE_178_MEDIA_SBP			0x0800
#define	AXE_178_MEDIA_SUPERMAC			0x1000

#define	AXE_RXCMD_PROMISC			0x0001
#define	AXE_RXCMD_ALLMULTI			0x0002
#define	AXE_172_RXCMD_UNICAST			0x0004
#define	AXE_178_RXCMD_KEEP_INVALID_CRC		0x0004
#define	AXE_RXCMD_BROADCAST			0x0008
#define	AXE_RXCMD_MULTICAST			0x0010
#define	AXE_RXCMD_ACCEPT_RUNT			0x0040	/* AX88772B */
#define	AXE_RXCMD_ENABLE			0x0080
#define	AXE_178_RXCMD_MFB_MASK			0x0300
#define	AXE_178_RXCMD_MFB_2048			0x0000
#define	AXE_178_RXCMD_MFB_4096			0x0100
#define	AXE_178_RXCMD_MFB_8192			0x0200
#define	AXE_178_RXCMD_MFB_16384			0x0300
#define	AXE_772B_RXCMD_HDR_TYPE_0		0x0000
#define	AXE_772B_RXCMD_HDR_TYPE_1		0x0100
#define	AXE_772B_RXCMD_IPHDR_ALIGN		0x0200
#define	AXE_772B_RXCMD_ADD_CHKSUM		0x0400
#define	AXE_RXCMD_LOOPBACK			0x1000	/* AX88772A/AX88772B */

#define	AXE_PHY_SEL_PRI		1
#define	AXE_PHY_SEL_SEC		0
#define	AXE_PHY_TYPE_MASK	0xE0
#define	AXE_PHY_TYPE_SHIFT	5
#define	AXE_PHY_TYPE(x)		\
	(((x) & AXE_PHY_TYPE_MASK) >> AXE_PHY_TYPE_SHIFT)

#define	PHY_TYPE_100_HOME	0	/* 10/100 or 1M HOME PHY */
#define	PHY_TYPE_GIG		1	/* Gigabit PHY */
#define	PHY_TYPE_SPECIAL	4	/* Special case */
#define	PHY_TYPE_RSVD		5	/* Reserved */
#define	PHY_TYPE_NON_SUP	7	/* Non-supported PHY */

#define	AXE_PHY_NO_MASK		0x1F
#define	AXE_PHY_NO(x)		((x) & AXE_PHY_NO_MASK)

#define	AXE_772_PHY_NO_EPHY	0x10	/* Embedded 10/100 PHY of AX88772 */

#define	AXE_GPIO0_EN		0x01
#define	AXE_GPIO0		0x02
#define	AXE_GPIO1_EN		0x04
#define	AXE_GPIO1		0x08
#define	AXE_GPIO2_EN		0x10
#define	AXE_GPIO2		0x20
#define	AXE_GPIO_RELOAD_EEPROM	0x80

#define	AXE_PHY_MODE_MARVELL		0x00
#define	AXE_PHY_MODE_CICADA		0x01
#define	AXE_PHY_MODE_AGERE		0x02
#define	AXE_PHY_MODE_CICADA_V2		0x05
#define	AXE_PHY_MODE_AGERE_GMII		0x06
#define	AXE_PHY_MODE_CICADA_V2_ASIX	0x09
#define	AXE_PHY_MODE_REALTEK_8211CL	0x0C
#define	AXE_PHY_MODE_REALTEK_8211BN	0x0D
#define	AXE_PHY_MODE_REALTEK_8251CL	0x0E
#define	AXE_PHY_MODE_ATTANSIC		0x40

/* AX88772A/AX88772B only. */
#define	AXE_SW_PHY_SELECT_EXT		0x0000
#define	AXE_SW_PHY_SELECT_EMBEDDED	0x0001
#define	AXE_SW_PHY_SELECT_AUTO		0x0002
#define	AXE_SW_PHY_SELECT_SS_MII	0x0004
#define	AXE_SW_PHY_SELECT_SS_RVRS_MII	0x0008
#define	AXE_SW_PHY_SELECT_SS_RVRS_RMII	0x000C
#define	AXE_SW_PHY_SELECT_SS_ENB	0x0010

/* AX88772A/AX88772B VLAN control. */
#define	AXE_VLAN_CTRL_ENB		0x00001000
#define	AXE_VLAN_CTRL_STRIP		0x00002000
#define	AXE_VLAN_CTRL_VID1_MASK		0x00000FFF
#define	AXE_VLAN_CTRL_VID2_MASK		0x0FFF0000

#define	AXE_RXCSUM_IP			0x0001
#define	AXE_RXCSUM_IPVE			0x0002
#define	AXE_RXCSUM_IPV6E		0x0004
#define	AXE_RXCSUM_TCP			0x0008
#define	AXE_RXCSUM_UDP			0x0010
#define	AXE_RXCSUM_ICMP			0x0020
#define	AXE_RXCSUM_IGMP			0x0040
#define	AXE_RXCSUM_ICMP6		0x0080
#define	AXE_RXCSUM_TCPV6		0x0100
#define	AXE_RXCSUM_UDPV6		0x0200
#define	AXE_RXCSUM_ICMPV6		0x0400
#define	AXE_RXCSUM_IGMPV6		0x0800
#define	AXE_RXCSUM_ICMP6V6		0x1000
#define	AXE_RXCSUM_FOPC			0x8000

#define	AXE_RXCSUM_64TE			0x0100
#define	AXE_RXCSUM_PPPOE		0x0200
#define	AXE_RXCSUM_RPCE			0x8000

#define	AXE_TXCSUM_IP			0x0001
#define	AXE_TXCSUM_TCP			0x0002
#define	AXE_TXCSUM_UDP			0x0004
#define	AXE_TXCSUM_ICMP			0x0008
#define	AXE_TXCSUM_IGMP			0x0010
#define	AXE_TXCSUM_ICMP6		0x0020
#define	AXE_TXCSUM_TCPV6		0x0100
#define	AXE_TXCSUM_UDPV6		0x0200
#define	AXE_TXCSUM_ICMPV6		0x0400
#define	AXE_TXCSUM_IGMPV6		0x0800
#define	AXE_TXCSUM_ICMP6V6		0x1000

#define	AXE_TXCSUM_64TE			0x0001
#define	AXE_TXCSUM_PPPOE		0x0002

#define	AXE_BULK_BUF_SIZE	16384	/* bytes */

#define	AXE_CTL_READ		0x01
#define	AXE_CTL_WRITE		0x02

#define	AXE_CONFIG_IDX		0	/* config number 1 */
#define	AXE_IFACE_IDX		0

/* EEPROM Map. */
#define	AXE_EEPROM_772B_NODE_ID		0x04
#define	AXE_EEPROM_772B_PHY_PWRCFG	0x18

struct ax88772b_mfb {
	int	byte_cnt;
	int	threshold;
	int	size;
};
#define	AX88772B_MFB_2K		0
#define	AX88772B_MFB_4K		1
#define	AX88772B_MFB_6K		2
#define	AX88772B_MFB_8K		3
#define	AX88772B_MFB_16K	4
#define	AX88772B_MFB_20K	5
#define	AX88772B_MFB_24K	6
#define	AX88772B_MFB_32K	7

struct axe_sframe_hdr {
	uint16_t len;
#define	AXE_HDR_LEN_MASK	0xFFFF
	uint16_t ilen;
} __packed;

#define	AXE_TX_CSUM_PSEUDO_HDR	0x4000
#define	AXE_TX_CSUM_DIS		0x8000

/*
 * When RX checksum offloading is enabled, AX88772B uses new RX header
 * format and it's not compatible with previous RX header format.  In
 * addition, IP header align option should be enabled to get correct
 * frame size including RX header.  Total transferred size including
 * the RX header is multiple of 4 and controller will pad necessary
 * bytes if the length is not multiple of 4.
 * This driver does not enable partial checksum feature which will
 * compute 16bit checksum from 14th byte to the end of the frame.  If
 * this feature is enabled, computed checksum value is embedded into
 * RX header which in turn means it uses different RX header format.
 */
struct axe_csum_hdr {
	uint16_t len;
#define	AXE_CSUM_HDR_LEN_MASK		0x07FF
#define	AXE_CSUM_HDR_CRC_ERR		0x1000
#define	AXE_CSUM_HDR_MII_ERR		0x2000
#define	AXE_CSUM_HDR_RUNT		0x4000
#define	AXE_CSUM_HDR_BMCAST		0x8000
	uint16_t ilen;
	uint16_t cstatus;
#define	AXE_CSUM_HDR_VLAN_MASK		0x0007
#define	AXE_CSUM_HDR_VLAN_STRIP		0x0008
#define	AXE_CSUM_HDR_VLAN_PRI_MASK	0x0070
#define	AXE_CSUM_HDR_L4_CSUM_ERR	0x0100
#define	AXE_CSUM_HDR_L3_CSUM_ERR	0x0200
#define	AXE_CSUM_HDR_L4_TYPE_UDP	0x0400
#define	AXE_CSUM_HDR_L4_TYPE_ICMP	0x0800
#define	AXE_CSUM_HDR_L4_TYPE_IGMP	0x0C00
#define	AXE_CSUM_HDR_L4_TYPE_TCP	0x1000
#define	AXE_CSUM_HDR_L4_TYPE_TCPV6	0x1400
#define	AXE_CSUM_HDR_L4_TYPE_MASK	0x1C00
#define	AXE_CSUM_HDR_L3_TYPE_IPV4	0x2000
#define	AXE_CSUM_HDR_L3_TYPE_IPV6	0x4000

#ifdef AXE_APPEND_PARTIAL_CSUM
	/*
	 * These members present only when partial checksum
	 * offloading is enabled.  The checksum value is simple
	 * 16bit sum of received frame starting at offset 14 of
	 * the frame to the end of the frame excluding FCS bytes.
	 */
	uint16_t csum_value;
	uint16_t dummy;
#endif
} __packed;

#define	AXE_CSUM_RXBYTES(x)	((x) & AXE_CSUM_HDR_LEN_MASK)

#define	GET_MII(sc)		uether_getmii(&(sc)->sc_ue)

/* The interrupt endpoint is currently unused by the ASIX part. */
enum {
	AXE_BULK_DT_WR,
	AXE_BULK_DT_RD,
	AXE_N_TRANSFER,
};

struct axe_softc {
	struct usb_ether	sc_ue;
	struct mtx		sc_mtx;
	struct usb_xfer	*sc_xfer[AXE_N_TRANSFER];
	int			sc_phyno;

	int			sc_flags;
#define	AXE_FLAG_LINK		0x0001
#define	AXE_FLAG_STD_FRAME	0x0010
#define	AXE_FLAG_CSUM_FRAME	0x0020
#define	AXE_FLAG_772		0x1000	/* AX88772 */
#define	AXE_FLAG_772A		0x2000	/* AX88772A */
#define	AXE_FLAG_772B		0x4000	/* AX88772B */
#define	AXE_FLAG_178		0x8000	/* AX88178 */

	uint8_t			sc_ipgs[3];
	uint8_t			sc_phyaddrs[2];
	uint16_t		sc_pwrcfg;
	uint16_t		sc_lenmask;
};

#define	AXE_IS_178_FAMILY(sc)						  \
	((sc)->sc_flags & (AXE_FLAG_772 | AXE_FLAG_772A | AXE_FLAG_772B | \
	AXE_FLAG_178))

#define	AXE_IS_772(sc)							  \
	((sc)->sc_flags & (AXE_FLAG_772 | AXE_FLAG_772A | AXE_FLAG_772B))

#define	AXE_LOCK(_sc)		mtx_lock(&(_sc)->sc_mtx)
#define	AXE_UNLOCK(_sc)		mtx_unlock(&(_sc)->sc_mtx)
#define	AXE_LOCK_ASSERT(_sc, t)	mtx_assert(&(_sc)->sc_mtx, t)