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