/*
 * Copyright (c) 2016 Piotr Mienkowski
 *
 * SPDX-License-Identifier: Apache-2.0
 */

/** @file
 * @brief Definitions for IEEE 802.3, Section 2 MII compatible PHY transceivers
 */

#ifndef _MII_H_
#define _MII_H_

/* MII management registers */
#define MII_BMCR       0x0  /** Basic Mode Control Register */
#define MII_BMSR       0x1  /** Basic Mode Status Register */
#define MII_PHYID1R    0x2  /** PHY ID 1 Register */
#define MII_PHYID2R    0x3  /** PHY ID 2 Register */
#define MII_ANAR       0x4  /** Auto-Negotiation Advertisement Register */
#define MII_ANLPAR     0x5  /** Auto-Negotiation Link Partner Ability Reg */
#define MII_ANER       0x6  /** Auto-Negotiation Expansion Register */
#define MII_ANNPTR     0x7  /** Auto-Negotiation Next Page Transmit Register */
#define MII_ANLPRNPR   0x8  /** Auto-Negotiation Link Partner Received Next Page Reg */
#define MII_MMD_ACR    0xd  /** MMD Access Control Register */
#define MII_MMD_AADR   0xe  /** MMD Access Address Data Register */
#define MII_ESTAT      0xf  /** Extended Status Register */

/* Basic Mode Control Register (BMCR) bit definitions */
#define MII_BMCR_RESET             (1 << 15) /** PHY reset */
#define MII_BMCR_LOOPBACK          (1 << 14) /** enable loopback mode */
#define MII_BMCR_SPEED_LSB         (1 << 13) /** 10=1000Mbps 01=100Mbps; 00=10Mbps */
#define MII_BMCR_AUTONEG_ENABLE    (1 << 12) /** Auto-Negotiation enable */
#define MII_BMCR_POWER_DOWN        (1 << 11) /** power down mode */
#define MII_BMCR_ISOLATE           (1 << 10) /** isolate electrically PHY from MII */
#define MII_BMCR_AUTONEG_RESTART   (1 << 9)  /** restart auto-negotiation */
#define MII_BMCR_DUPLEX_MODE       (1 << 8)  /** full duplex mode */
#define MII_BMCR_SPEED_MSB         (1 << 6)  /** 10=1000Mbps 01=100Mbps; 00=10Mbps */
#define   MII_BMCR_SPEED_MASK      (1 << 6 | 1 << 13) /** Link Speed Field */
#define   MII_BMCR_SPEED_10        (0 << 6 | 0 << 13) /** select speed 10 Mb/s */
#define   MII_BMCR_SPEED_100       (0 << 6 | 1 << 13) /** select speed 100 Mb/s */
#define   MII_BMCR_SPEED_1000      (1 << 6 | 0 << 13) /** select speed 1000 Mb/s */

/* Basic Mode Status Register (BMSR) bit definitions */
#define MII_BMSR_100BASE_T4        (1 << 15) /** 100BASE-T4 capable */
#define MII_BMSR_100BASE_X_FULL    (1 << 14) /** 100BASE-X full duplex capable */
#define MII_BMSR_100BASE_X_HALF    (1 << 13) /** 100BASE-X half duplex capable */
#define MII_BMSR_10_FULL           (1 << 12) /** 10 Mb/s full duplex capable */
#define MII_BMSR_10_HALF           (1 << 11) /** 10 Mb/s half duplex capable */
#define MII_BMSR_100BASE_T2_FULL   (1 << 10) /** 100BASE-T2 full duplex capable */
#define MII_BMSR_100BASE_T2_HALF   (1 << 9)  /** 100BASE-T2 half duplex capable */
#define MII_BMSR_EXTEND_STATUS     (1 << 8)  /** extend status information in reg 15 */
#define MII_BMSR_MF_PREAMB_SUPPR   (1 << 6)  /** PHY accepts management frames with preamble suppressed */
#define MII_BMSR_AUTONEG_COMPLETE  (1 << 5)  /** Auto-negotiation process completed */
#define MII_BMSR_REMOTE_FAULT      (1 << 4)  /** remote fault detected */
#define MII_BMSR_AUTONEG_ABILITY   (1 << 3)  /** PHY is able to perform Auto-Negotiation */
#define MII_BMSR_LINK_STATUS       (1 << 2)  /** link is up */
#define MII_BMSR_JABBER_DETECT     (1 << 1)  /** jabber condition detected */
#define MII_BMSR_EXTEND_CAPAB      (1 << 0)  /** extended register capabilities */

/* Auto-negotiation Advertisement Register (ANAR) bit definitions */
/* Auto-negotiation Link Partner Ability Register (ANLPAR) bit definitions */
#define MII_ADVERTISE_NEXT_PAGE    (1 << 15) /** next page */
#define MII_ADVERTISE_LPACK        (1 << 14) /** link partner acknowledge response */
#define MII_ADVERTISE_REMOTE_FAULT (1 << 13) /** remote fault */
#define MII_ADVERTISE_ASYM_PAUSE   (1 << 11) /** try for asymmetric pause */
#define MII_ADVERTISE_PAUSE        (1 << 10) /** try for pause */
#define MII_ADVERTISE_100BASE_T4   (1 << 9)  /** try for 100BASE-T4 support */
#define MII_ADVERTISE_100_FULL     (1 << 8)  /** try for 100BASE-X full duplex support */
#define MII_ADVERTISE_100_HALF     (1 << 7)  /** try for 100BASE-X support */
#define MII_ADVERTISE_10_FULL      (1 << 6)  /** try for 10 Mb/s full duplex support */
#define MII_ADVERTISE_10_HALF      (1 << 5)  /** try for 10 Mb/s half duplex support */
#define MII_ADVERTISE_SEL_MASK     (0x1F << 0) /** Selector Field */
#define MII_ADVERTISE_SEL_IEEE_802_3   0x01

#define MII_ADVERTISE_ALL (MII_ADVERTISE_10_HALF | MII_ADVERTISE_10_FULL |\
			   MII_ADVERTISE_100_HALF | MII_ADVERTISE_100_FULL |\
			   MII_ADVERTISE_SEL_IEEE_802_3)

#endif /* _MII_H_ */