forked from luck/tmp_suning_uos_patched
767f4a7ca8
Currently, if pause autoneg is off we do not set either pause advertising flag. If autonegotiation of speed and duplex settings is enabled, there is no way for the link partner to distinguish this from our refusing to use pause frames. We should instead set the advertising flags according to the forced mode so that the link partner can follow our lead. This is consistent with the behaviour of other drivers. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
438 lines
12 KiB
C
438 lines
12 KiB
C
/*
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* mdio.c: Generic support for MDIO-compatible transceivers
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* Copyright 2006-2009 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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#include <linux/kernel.h>
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#include <linux/capability.h>
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#include <linux/errno.h>
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#include <linux/ethtool.h>
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#include <linux/mdio.h>
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#include <linux/module.h>
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MODULE_DESCRIPTION("Generic support for MDIO-compatible transceivers");
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MODULE_AUTHOR("Copyright 2006-2009 Solarflare Communications Inc.");
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MODULE_LICENSE("GPL");
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/**
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* mdio45_probe - probe for an MDIO (clause 45) device
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* @mdio: MDIO interface
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* @prtad: Expected PHY address
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*
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* This sets @prtad and @mmds in the MDIO interface if successful.
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* Returns 0 on success, negative on error.
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*/
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int mdio45_probe(struct mdio_if_info *mdio, int prtad)
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{
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int mmd, stat2, devs1, devs2;
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/* Assume PHY must have at least one of PMA/PMD, WIS, PCS, PHY
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* XS or DTE XS; give up if none is present. */
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for (mmd = 1; mmd <= 5; mmd++) {
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/* Is this MMD present? */
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stat2 = mdio->mdio_read(mdio->dev, prtad, mmd, MDIO_STAT2);
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if (stat2 < 0 ||
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(stat2 & MDIO_STAT2_DEVPRST) != MDIO_STAT2_DEVPRST_VAL)
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continue;
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/* It should tell us about all the other MMDs */
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devs1 = mdio->mdio_read(mdio->dev, prtad, mmd, MDIO_DEVS1);
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devs2 = mdio->mdio_read(mdio->dev, prtad, mmd, MDIO_DEVS2);
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if (devs1 < 0 || devs2 < 0)
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continue;
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mdio->prtad = prtad;
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mdio->mmds = devs1 | (devs2 << 16);
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return 0;
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}
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return -ENODEV;
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}
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EXPORT_SYMBOL(mdio45_probe);
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/**
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* mdio_set_flag - set or clear flag in an MDIO register
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* @mdio: MDIO interface
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* @prtad: PHY address
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* @devad: MMD address
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* @addr: Register address
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* @mask: Mask for flag (single bit set)
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* @sense: New value of flag
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*
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* This debounces changes: it does not write the register if the flag
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* already has the proper value. Returns 0 on success, negative on error.
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*/
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int mdio_set_flag(const struct mdio_if_info *mdio,
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int prtad, int devad, u16 addr, int mask,
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bool sense)
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{
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int old_val = mdio->mdio_read(mdio->dev, prtad, devad, addr);
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int new_val;
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if (old_val < 0)
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return old_val;
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if (sense)
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new_val = old_val | mask;
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else
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new_val = old_val & ~mask;
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if (old_val == new_val)
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return 0;
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return mdio->mdio_write(mdio->dev, prtad, devad, addr, new_val);
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}
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EXPORT_SYMBOL(mdio_set_flag);
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/**
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* mdio_link_ok - is link status up/OK
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* @mdio: MDIO interface
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* @mmd_mask: Mask for MMDs to check
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*
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* Returns 1 if the PHY reports link status up/OK, 0 otherwise.
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* @mmd_mask is normally @mdio->mmds, but if loopback is enabled
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* the MMDs being bypassed should be excluded from the mask.
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*/
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int mdio45_links_ok(const struct mdio_if_info *mdio, u32 mmd_mask)
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{
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int devad, reg;
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if (!mmd_mask) {
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/* Use absence of XGMII faults in lieu of link state */
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reg = mdio->mdio_read(mdio->dev, mdio->prtad,
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MDIO_MMD_PHYXS, MDIO_STAT2);
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return reg >= 0 && !(reg & MDIO_STAT2_RXFAULT);
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}
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for (devad = 0; mmd_mask; devad++) {
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if (mmd_mask & (1 << devad)) {
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mmd_mask &= ~(1 << devad);
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/* Reset the latched status and fault flags */
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mdio->mdio_read(mdio->dev, mdio->prtad,
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devad, MDIO_STAT1);
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if (devad == MDIO_MMD_PMAPMD || devad == MDIO_MMD_PCS ||
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devad == MDIO_MMD_PHYXS || devad == MDIO_MMD_DTEXS)
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mdio->mdio_read(mdio->dev, mdio->prtad,
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devad, MDIO_STAT2);
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/* Check the current status and fault flags */
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reg = mdio->mdio_read(mdio->dev, mdio->prtad,
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devad, MDIO_STAT1);
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if (reg < 0 ||
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(reg & (MDIO_STAT1_FAULT | MDIO_STAT1_LSTATUS)) !=
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MDIO_STAT1_LSTATUS)
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return false;
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}
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}
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return true;
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}
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EXPORT_SYMBOL(mdio45_links_ok);
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/**
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* mdio45_nway_restart - restart auto-negotiation for this interface
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* @mdio: MDIO interface
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*
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* Returns 0 on success, negative on error.
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*/
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int mdio45_nway_restart(const struct mdio_if_info *mdio)
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{
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if (!(mdio->mmds & MDIO_DEVS_AN))
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return -EOPNOTSUPP;
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mdio_set_flag(mdio, mdio->prtad, MDIO_MMD_AN, MDIO_CTRL1,
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MDIO_AN_CTRL1_RESTART, true);
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return 0;
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}
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EXPORT_SYMBOL(mdio45_nway_restart);
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static u32 mdio45_get_an(const struct mdio_if_info *mdio, u16 addr)
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{
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u32 result = 0;
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int reg;
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reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_AN, addr);
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if (reg & ADVERTISE_10HALF)
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result |= ADVERTISED_10baseT_Half;
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if (reg & ADVERTISE_10FULL)
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result |= ADVERTISED_10baseT_Full;
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if (reg & ADVERTISE_100HALF)
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result |= ADVERTISED_100baseT_Half;
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if (reg & ADVERTISE_100FULL)
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result |= ADVERTISED_100baseT_Full;
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return result;
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}
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/**
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* mdio45_ethtool_gset_npage - get settings for ETHTOOL_GSET
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* @mdio: MDIO interface
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* @ecmd: Ethtool request structure
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* @npage_adv: Modes currently advertised on next pages
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* @npage_lpa: Modes advertised by link partner on next pages
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*
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* Since the CSRs for auto-negotiation using next pages are not fully
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* standardised, this function does not attempt to decode them. The
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* caller must pass them in.
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*/
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void mdio45_ethtool_gset_npage(const struct mdio_if_info *mdio,
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struct ethtool_cmd *ecmd,
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u32 npage_adv, u32 npage_lpa)
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{
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int reg;
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ecmd->transceiver = XCVR_INTERNAL;
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ecmd->phy_address = mdio->prtad;
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ecmd->mdio_support =
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mdio->mode_support & (MDIO_SUPPORTS_C45 | MDIO_SUPPORTS_C22);
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reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
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MDIO_CTRL2);
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switch (reg & MDIO_PMA_CTRL2_TYPE) {
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case MDIO_PMA_CTRL2_10GBT:
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case MDIO_PMA_CTRL2_1000BT:
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case MDIO_PMA_CTRL2_100BTX:
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case MDIO_PMA_CTRL2_10BT:
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ecmd->port = PORT_TP;
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ecmd->supported = SUPPORTED_TP;
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reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
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MDIO_SPEED);
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if (reg & MDIO_SPEED_10G)
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ecmd->supported |= SUPPORTED_10000baseT_Full;
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if (reg & MDIO_PMA_SPEED_1000)
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ecmd->supported |= (SUPPORTED_1000baseT_Full |
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SUPPORTED_1000baseT_Half);
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if (reg & MDIO_PMA_SPEED_100)
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ecmd->supported |= (SUPPORTED_100baseT_Full |
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SUPPORTED_100baseT_Half);
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if (reg & MDIO_PMA_SPEED_10)
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ecmd->supported |= (SUPPORTED_10baseT_Full |
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SUPPORTED_10baseT_Half);
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ecmd->advertising = ADVERTISED_TP;
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break;
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case MDIO_PMA_CTRL2_10GBCX4:
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ecmd->port = PORT_OTHER;
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ecmd->supported = 0;
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ecmd->advertising = 0;
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break;
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case MDIO_PMA_CTRL2_10GBKX4:
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case MDIO_PMA_CTRL2_10GBKR:
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case MDIO_PMA_CTRL2_1000BKX:
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ecmd->port = PORT_OTHER;
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ecmd->supported = SUPPORTED_Backplane;
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reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
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MDIO_PMA_EXTABLE);
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if (reg & MDIO_PMA_EXTABLE_10GBKX4)
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ecmd->supported |= SUPPORTED_10000baseKX4_Full;
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if (reg & MDIO_PMA_EXTABLE_10GBKR)
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ecmd->supported |= SUPPORTED_10000baseKR_Full;
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if (reg & MDIO_PMA_EXTABLE_1000BKX)
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ecmd->supported |= SUPPORTED_1000baseKX_Full;
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reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
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MDIO_PMA_10GBR_FECABLE);
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if (reg & MDIO_PMA_10GBR_FECABLE_ABLE)
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ecmd->supported |= SUPPORTED_10000baseR_FEC;
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ecmd->advertising = ADVERTISED_Backplane;
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break;
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/* All the other defined modes are flavours of optical */
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default:
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ecmd->port = PORT_FIBRE;
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ecmd->supported = SUPPORTED_FIBRE;
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ecmd->advertising = ADVERTISED_FIBRE;
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break;
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}
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if (mdio->mmds & MDIO_DEVS_AN) {
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ecmd->supported |= SUPPORTED_Autoneg;
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reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_AN,
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MDIO_CTRL1);
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if (reg & MDIO_AN_CTRL1_ENABLE) {
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ecmd->autoneg = AUTONEG_ENABLE;
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ecmd->advertising |=
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ADVERTISED_Autoneg |
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mdio45_get_an(mdio, MDIO_AN_ADVERTISE) |
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npage_adv;
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} else {
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ecmd->autoneg = AUTONEG_DISABLE;
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}
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} else {
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ecmd->autoneg = AUTONEG_DISABLE;
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}
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if (ecmd->autoneg) {
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u32 modes = 0;
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int an_stat = mdio->mdio_read(mdio->dev, mdio->prtad,
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MDIO_MMD_AN, MDIO_STAT1);
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/* If AN is complete and successful, report best common
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* mode, otherwise report best advertised mode. */
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if (an_stat & MDIO_AN_STAT1_COMPLETE) {
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ecmd->lp_advertising =
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mdio45_get_an(mdio, MDIO_AN_LPA) | npage_lpa;
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if (an_stat & MDIO_AN_STAT1_LPABLE)
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ecmd->lp_advertising |= ADVERTISED_Autoneg;
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modes = ecmd->advertising & ecmd->lp_advertising;
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}
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if ((modes & ~ADVERTISED_Autoneg) == 0)
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modes = ecmd->advertising;
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if (modes & (ADVERTISED_10000baseT_Full |
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ADVERTISED_10000baseKX4_Full |
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ADVERTISED_10000baseKR_Full)) {
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ecmd->speed = SPEED_10000;
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ecmd->duplex = DUPLEX_FULL;
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} else if (modes & (ADVERTISED_1000baseT_Full |
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ADVERTISED_1000baseT_Half |
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ADVERTISED_1000baseKX_Full)) {
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ecmd->speed = SPEED_1000;
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ecmd->duplex = !(modes & ADVERTISED_1000baseT_Half);
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} else if (modes & (ADVERTISED_100baseT_Full |
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ADVERTISED_100baseT_Half)) {
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ecmd->speed = SPEED_100;
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ecmd->duplex = !!(modes & ADVERTISED_100baseT_Full);
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} else {
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ecmd->speed = SPEED_10;
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ecmd->duplex = !!(modes & ADVERTISED_10baseT_Full);
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}
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} else {
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/* Report forced settings */
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reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
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MDIO_CTRL1);
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ecmd->speed = (((reg & MDIO_PMA_CTRL1_SPEED1000) ? 100 : 1) *
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((reg & MDIO_PMA_CTRL1_SPEED100) ? 100 : 10));
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ecmd->duplex = (reg & MDIO_CTRL1_FULLDPLX ||
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ecmd->speed == SPEED_10000);
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}
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/* 10GBASE-T MDI/MDI-X */
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if (ecmd->port == PORT_TP && ecmd->speed == SPEED_10000) {
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switch (mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
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MDIO_PMA_10GBT_SWAPPOL)) {
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case MDIO_PMA_10GBT_SWAPPOL_ABNX | MDIO_PMA_10GBT_SWAPPOL_CDNX:
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ecmd->eth_tp_mdix = ETH_TP_MDI;
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break;
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case 0:
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ecmd->eth_tp_mdix = ETH_TP_MDI_X;
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break;
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default:
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/* It's complicated... */
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ecmd->eth_tp_mdix = ETH_TP_MDI_INVALID;
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break;
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}
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}
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}
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EXPORT_SYMBOL(mdio45_ethtool_gset_npage);
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/**
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* mdio45_ethtool_spauseparam_an - set auto-negotiated pause parameters
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* @mdio: MDIO interface
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* @ecmd: Ethtool request structure
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*
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* This function assumes that the PHY has an auto-negotiation MMD. It
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* will enable and disable advertising of flow control as appropriate.
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*/
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void mdio45_ethtool_spauseparam_an(const struct mdio_if_info *mdio,
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const struct ethtool_pauseparam *ecmd)
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{
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int adv, old_adv;
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WARN_ON(!(mdio->mmds & MDIO_DEVS_AN));
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old_adv = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_AN,
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MDIO_AN_ADVERTISE);
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adv = ((old_adv & ~(ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM)) |
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mii_advertise_flowctrl((ecmd->rx_pause ? FLOW_CTRL_RX : 0) |
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(ecmd->tx_pause ? FLOW_CTRL_TX : 0)));
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if (adv != old_adv) {
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mdio->mdio_write(mdio->dev, mdio->prtad, MDIO_MMD_AN,
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MDIO_AN_ADVERTISE, adv);
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mdio45_nway_restart(mdio);
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}
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}
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EXPORT_SYMBOL(mdio45_ethtool_spauseparam_an);
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/**
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* mdio_mii_ioctl - MII ioctl interface for MDIO (clause 22 or 45) PHYs
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* @mdio: MDIO interface
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* @mii_data: MII ioctl data structure
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* @cmd: MII ioctl command
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*
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* Returns 0 on success, negative on error.
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*/
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int mdio_mii_ioctl(const struct mdio_if_info *mdio,
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struct mii_ioctl_data *mii_data, int cmd)
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{
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int prtad, devad;
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u16 addr = mii_data->reg_num;
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/* Validate/convert cmd to one of SIOC{G,S}MIIREG */
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switch (cmd) {
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case SIOCGMIIPHY:
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if (mdio->prtad == MDIO_PRTAD_NONE)
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return -EOPNOTSUPP;
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mii_data->phy_id = mdio->prtad;
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cmd = SIOCGMIIREG;
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break;
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case SIOCGMIIREG:
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case SIOCSMIIREG:
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break;
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default:
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return -EOPNOTSUPP;
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}
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/* Validate/convert phy_id */
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if ((mdio->mode_support & MDIO_SUPPORTS_C45) &&
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mdio_phy_id_is_c45(mii_data->phy_id)) {
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prtad = mdio_phy_id_prtad(mii_data->phy_id);
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devad = mdio_phy_id_devad(mii_data->phy_id);
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} else if ((mdio->mode_support & MDIO_SUPPORTS_C22) &&
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mii_data->phy_id < 0x20) {
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prtad = mii_data->phy_id;
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devad = MDIO_DEVAD_NONE;
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addr &= 0x1f;
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} else if ((mdio->mode_support & MDIO_EMULATE_C22) &&
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mdio->prtad != MDIO_PRTAD_NONE &&
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mii_data->phy_id == mdio->prtad) {
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/* Remap commonly-used MII registers. */
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prtad = mdio->prtad;
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switch (addr) {
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case MII_BMCR:
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case MII_BMSR:
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case MII_PHYSID1:
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case MII_PHYSID2:
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devad = __ffs(mdio->mmds);
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break;
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case MII_ADVERTISE:
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case MII_LPA:
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if (!(mdio->mmds & MDIO_DEVS_AN))
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return -EINVAL;
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devad = MDIO_MMD_AN;
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if (addr == MII_ADVERTISE)
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addr = MDIO_AN_ADVERTISE;
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else
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addr = MDIO_AN_LPA;
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break;
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default:
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return -EINVAL;
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}
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} else {
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return -EINVAL;
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}
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if (cmd == SIOCGMIIREG) {
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int rc = mdio->mdio_read(mdio->dev, prtad, devad, addr);
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if (rc < 0)
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return rc;
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mii_data->val_out = rc;
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return 0;
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} else {
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return mdio->mdio_write(mdio->dev, prtad, devad, addr,
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mii_data->val_in);
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}
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}
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EXPORT_SYMBOL(mdio_mii_ioctl);
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