196 lines
7.4 KiB
C
196 lines
7.4 KiB
C
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/****************************************************************************
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* Driver for Solarflare Solarstorm network controllers and boards
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* Copyright 2005-2006 Fen Systems Ltd.
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* Copyright 2006 Solarflare Communications Inc.
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published
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* by the Free Software Foundation, incorporated herein by reference.
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*/
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#ifndef EFX_GMII_H
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#define EFX_GMII_H
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/*
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* GMII interface
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*/
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#include <linux/mii.h>
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/* GMII registers, excluding registers already defined as MII
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* registers in mii.h
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*/
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#define GMII_IER 0x12 /* Interrupt enable register */
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#define GMII_ISR 0x13 /* Interrupt status register */
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/* Interrupt enable register */
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#define IER_ANEG_ERR 0x8000 /* Bit 15 - autonegotiation error */
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#define IER_SPEED_CHG 0x4000 /* Bit 14 - speed changed */
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#define IER_DUPLEX_CHG 0x2000 /* Bit 13 - duplex changed */
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#define IER_PAGE_RCVD 0x1000 /* Bit 12 - page received */
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#define IER_ANEG_DONE 0x0800 /* Bit 11 - autonegotiation complete */
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#define IER_LINK_CHG 0x0400 /* Bit 10 - link status changed */
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#define IER_SYM_ERR 0x0200 /* Bit 9 - symbol error */
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#define IER_FALSE_CARRIER 0x0100 /* Bit 8 - false carrier */
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#define IER_FIFO_ERR 0x0080 /* Bit 7 - FIFO over/underflow */
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#define IER_MDIX_CHG 0x0040 /* Bit 6 - MDI crossover changed */
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#define IER_DOWNSHIFT 0x0020 /* Bit 5 - downshift */
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#define IER_ENERGY 0x0010 /* Bit 4 - energy detect */
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#define IER_DTE_POWER 0x0004 /* Bit 2 - DTE power detect */
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#define IER_POLARITY_CHG 0x0002 /* Bit 1 - polarity changed */
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#define IER_JABBER 0x0001 /* Bit 0 - jabber */
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/* Interrupt status register */
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#define ISR_ANEG_ERR 0x8000 /* Bit 15 - autonegotiation error */
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#define ISR_SPEED_CHG 0x4000 /* Bit 14 - speed changed */
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#define ISR_DUPLEX_CHG 0x2000 /* Bit 13 - duplex changed */
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#define ISR_PAGE_RCVD 0x1000 /* Bit 12 - page received */
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#define ISR_ANEG_DONE 0x0800 /* Bit 11 - autonegotiation complete */
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#define ISR_LINK_CHG 0x0400 /* Bit 10 - link status changed */
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#define ISR_SYM_ERR 0x0200 /* Bit 9 - symbol error */
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#define ISR_FALSE_CARRIER 0x0100 /* Bit 8 - false carrier */
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#define ISR_FIFO_ERR 0x0080 /* Bit 7 - FIFO over/underflow */
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#define ISR_MDIX_CHG 0x0040 /* Bit 6 - MDI crossover changed */
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#define ISR_DOWNSHIFT 0x0020 /* Bit 5 - downshift */
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#define ISR_ENERGY 0x0010 /* Bit 4 - energy detect */
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#define ISR_DTE_POWER 0x0004 /* Bit 2 - DTE power detect */
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#define ISR_POLARITY_CHG 0x0002 /* Bit 1 - polarity changed */
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#define ISR_JABBER 0x0001 /* Bit 0 - jabber */
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/* Logically extended advertisement register */
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#define GM_ADVERTISE_SLCT ADVERTISE_SLCT
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#define GM_ADVERTISE_CSMA ADVERTISE_CSMA
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#define GM_ADVERTISE_10HALF ADVERTISE_10HALF
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#define GM_ADVERTISE_1000XFULL ADVERTISE_1000XFULL
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#define GM_ADVERTISE_10FULL ADVERTISE_10FULL
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#define GM_ADVERTISE_1000XHALF ADVERTISE_1000XHALF
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#define GM_ADVERTISE_100HALF ADVERTISE_100HALF
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#define GM_ADVERTISE_1000XPAUSE ADVERTISE_1000XPAUSE
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#define GM_ADVERTISE_100FULL ADVERTISE_100FULL
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#define GM_ADVERTISE_1000XPSE_ASYM ADVERTISE_1000XPSE_ASYM
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#define GM_ADVERTISE_100BASE4 ADVERTISE_100BASE4
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#define GM_ADVERTISE_PAUSE_CAP ADVERTISE_PAUSE_CAP
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#define GM_ADVERTISE_PAUSE_ASYM ADVERTISE_PAUSE_ASYM
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#define GM_ADVERTISE_RESV ADVERTISE_RESV
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#define GM_ADVERTISE_RFAULT ADVERTISE_RFAULT
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#define GM_ADVERTISE_LPACK ADVERTISE_LPACK
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#define GM_ADVERTISE_NPAGE ADVERTISE_NPAGE
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#define GM_ADVERTISE_1000FULL (ADVERTISE_1000FULL << 8)
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#define GM_ADVERTISE_1000HALF (ADVERTISE_1000HALF << 8)
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#define GM_ADVERTISE_1000 (GM_ADVERTISE_1000FULL | \
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GM_ADVERTISE_1000HALF)
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#define GM_ADVERTISE_FULL (GM_ADVERTISE_1000FULL | \
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ADVERTISE_FULL)
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#define GM_ADVERTISE_ALL (GM_ADVERTISE_1000FULL | \
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GM_ADVERTISE_1000HALF | \
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ADVERTISE_ALL)
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/* Logically extended link partner ability register */
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#define GM_LPA_SLCT LPA_SLCT
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#define GM_LPA_10HALF LPA_10HALF
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#define GM_LPA_1000XFULL LPA_1000XFULL
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#define GM_LPA_10FULL LPA_10FULL
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#define GM_LPA_1000XHALF LPA_1000XHALF
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#define GM_LPA_100HALF LPA_100HALF
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#define GM_LPA_1000XPAUSE LPA_1000XPAUSE
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#define GM_LPA_100FULL LPA_100FULL
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#define GM_LPA_1000XPAUSE_ASYM LPA_1000XPAUSE_ASYM
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#define GM_LPA_100BASE4 LPA_100BASE4
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#define GM_LPA_PAUSE_CAP LPA_PAUSE_CAP
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#define GM_LPA_PAUSE_ASYM LPA_PAUSE_ASYM
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#define GM_LPA_RESV LPA_RESV
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#define GM_LPA_RFAULT LPA_RFAULT
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#define GM_LPA_LPACK LPA_LPACK
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#define GM_LPA_NPAGE LPA_NPAGE
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#define GM_LPA_1000FULL (LPA_1000FULL << 6)
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#define GM_LPA_1000HALF (LPA_1000HALF << 6)
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#define GM_LPA_10000FULL 0x00040000
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#define GM_LPA_10000HALF 0x00080000
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#define GM_LPA_DUPLEX (GM_LPA_1000FULL | GM_LPA_10000FULL \
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| LPA_DUPLEX)
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#define GM_LPA_10 (LPA_10FULL | LPA_10HALF)
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#define GM_LPA_100 LPA_100
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#define GM_LPA_1000 (GM_LPA_1000FULL | GM_LPA_1000HALF)
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#define GM_LPA_10000 (GM_LPA_10000FULL | GM_LPA_10000HALF)
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/* Retrieve GMII autonegotiation advertised abilities
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*
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* The MII advertisment register (MII_ADVERTISE) is logically extended
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* to include advertisement bits ADVERTISE_1000FULL and
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* ADVERTISE_1000HALF from MII_CTRL1000. The result can be tested
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* against the GM_ADVERTISE_xxx constants.
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*/
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static inline unsigned int gmii_advertised(struct mii_if_info *gmii)
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{
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unsigned int advertise;
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unsigned int ctrl1000;
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advertise = gmii->mdio_read(gmii->dev, gmii->phy_id, MII_ADVERTISE);
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ctrl1000 = gmii->mdio_read(gmii->dev, gmii->phy_id, MII_CTRL1000);
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return (((ctrl1000 << 8) & GM_ADVERTISE_1000) | advertise);
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}
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/* Retrieve GMII autonegotiation link partner abilities
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*
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* The MII link partner ability register (MII_LPA) is logically
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* extended by adding bits LPA_1000HALF and LPA_1000FULL from
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* MII_STAT1000. The result can be tested against the GM_LPA_xxx
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* constants.
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*/
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static inline unsigned int gmii_lpa(struct mii_if_info *gmii)
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{
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unsigned int lpa;
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unsigned int stat1000;
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lpa = gmii->mdio_read(gmii->dev, gmii->phy_id, MII_LPA);
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stat1000 = gmii->mdio_read(gmii->dev, gmii->phy_id, MII_STAT1000);
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return (((stat1000 << 6) & GM_LPA_1000) | lpa);
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}
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/* Calculate GMII autonegotiated link technology
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*
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* "negotiated" should be the result of gmii_advertised() logically
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* ANDed with the result of gmii_lpa().
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*
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* "tech" will be negotiated with the unused bits masked out. For
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* example, if both ends of the link are capable of both
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* GM_LPA_1000FULL and GM_LPA_100FULL, GM_LPA_100FULL will be masked
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* out.
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*/
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static inline unsigned int gmii_nway_result(unsigned int negotiated)
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{
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unsigned int other_bits;
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/* Mask out the speed and duplexity bits */
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other_bits = negotiated & ~(GM_LPA_10 | GM_LPA_100 | GM_LPA_1000);
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if (negotiated & GM_LPA_1000FULL)
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return (other_bits | GM_LPA_1000FULL);
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else if (negotiated & GM_LPA_1000HALF)
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return (other_bits | GM_LPA_1000HALF);
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else
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return (other_bits | mii_nway_result(negotiated));
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}
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/* Calculate GMII non-autonegotiated link technology
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*
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* This provides an equivalent to gmii_nway_result for the case when
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* autonegotiation is disabled.
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*/
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static inline unsigned int gmii_forced_result(unsigned int bmcr)
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{
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unsigned int result;
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int full_duplex;
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full_duplex = bmcr & BMCR_FULLDPLX;
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if (bmcr & BMCR_SPEED1000)
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result = full_duplex ? GM_LPA_1000FULL : GM_LPA_1000HALF;
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else if (bmcr & BMCR_SPEED100)
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result = full_duplex ? GM_LPA_100FULL : GM_LPA_100HALF;
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else
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result = full_duplex ? GM_LPA_10FULL : GM_LPA_10HALF;
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return result;
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}
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#endif /* EFX_GMII_H */
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