forked from luck/tmp_suning_uos_patched
mdio: Add generic MDIO (clause 45) support functions
These roughly mirror many of the MII library functions and are based on code from the sfc driver. Signed-off-by: Ben Hutchings <bhutchings@solarflare.com> Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Ben Hutchings
David S. Miller
parent
52c94dfae1
commit
1b1c2e9510
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@ -2443,6 +2443,9 @@ menuconfig NETDEV_10000
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if NETDEV_10000
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config MDIO
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tristate
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config CHELSIO_T1
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tristate "Chelsio 10Gb Ethernet support"
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depends on PCI
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@ -95,6 +95,7 @@ obj-$(CONFIG_SH_ETH) += sh_eth.o
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#
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obj-$(CONFIG_MII) += mii.o
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obj-$(CONFIG_MDIO) += mdio.o
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obj-$(CONFIG_PHYLIB) += phy/
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obj-$(CONFIG_SUNDANCE) += sundance.o
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359
drivers/net/mdio.c
Normal file
359
drivers/net/mdio.c
Normal file
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@ -0,0 +1,359 @@
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/*
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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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/**
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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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/* Read twice because link state is latched and a
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* read moves the current state into the register */
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mdio->mdio_read(mdio->dev, mdio->prtad,
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devad, MDIO_STAT1);
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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 || !(reg & 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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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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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 = 0;
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ecmd->advertising = 0;
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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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/* If AN is complete and successful, report best common
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* mode, otherwise report best advertised mode. */
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if (mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_AN,
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MDIO_STAT1) &
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MDIO_AN_STAT1_COMPLETE)
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modes = (ecmd->advertising &
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(mdio45_get_an(mdio, MDIO_AN_LPA) |
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npage_lpa));
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if (modes == 0)
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modes = ecmd->advertising;
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if (modes & ADVERTISED_10000baseT_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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ecmd->speed = SPEED_1000;
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ecmd->duplex = !!(modes & ADVERTISED_1000baseT_Full);
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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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}
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EXPORT_SYMBOL(mdio45_ethtool_gset_npage);
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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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break;
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case SIOCSMIIREG:
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if (!capable(CAP_NET_ADMIN))
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return -EPERM;
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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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@ -234,4 +234,70 @@ static inline __u16 mdio_phy_id_devad(int phy_id)
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return phy_id & MDIO_PHY_ID_DEVAD;
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}
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#ifdef __KERNEL__
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/**
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* struct mdio_if_info - Ethernet controller MDIO interface
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* @prtad: PRTAD of the PHY (%MDIO_PRTAD_NONE if not present/unknown)
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* @mmds: Mask of MMDs expected to be present in the PHY. This must be
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* non-zero unless @prtad = %MDIO_PRTAD_NONE.
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* @mode_support: MDIO modes supported. If %MDIO_SUPPORTS_C22 is set then
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* MII register access will be passed through with @devad =
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* %MDIO_DEVAD_NONE. If %MDIO_EMULATE_C22 is set then access to
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* commonly used clause 22 registers will be translated into
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* clause 45 registers.
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* @dev: Net device structure
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* @mdio_read: Register read function; returns value or negative error code
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* @mdio_write: Register write function; returns 0 or negative error code
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*/
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struct mdio_if_info {
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int prtad;
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u32 __bitwise mmds;
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unsigned mode_support;
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struct net_device *dev;
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int (*mdio_read)(struct net_device *dev, int prtad, int devad,
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u16 addr);
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int (*mdio_write)(struct net_device *dev, int prtad, int devad,
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u16 addr, u16 val);
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};
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#define MDIO_PRTAD_NONE (-1)
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#define MDIO_DEVAD_NONE (-1)
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#define MDIO_SUPPORTS_C22 1
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#define MDIO_SUPPORTS_C45 2
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#define MDIO_EMULATE_C22 4
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struct ethtool_cmd;
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struct ethtool_pauseparam;
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extern int mdio45_probe(struct mdio_if_info *mdio, int prtad);
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extern 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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extern int mdio45_links_ok(const struct mdio_if_info *mdio, u32 mmds);
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extern int mdio45_nway_restart(const struct mdio_if_info *mdio);
|
||||
extern void mdio45_ethtool_gset_npage(const struct mdio_if_info *mdio,
|
||||
struct ethtool_cmd *ecmd,
|
||||
u32 npage_adv, u32 npage_lpa);
|
||||
|
||||
/**
|
||||
* mdio45_ethtool_gset - get settings for ETHTOOL_GSET
|
||||
* @mdio: MDIO interface
|
||||
* @ecmd: Ethtool request structure
|
||||
*
|
||||
* Since the CSRs for auto-negotiation using next pages are not fully
|
||||
* standardised, this function does not attempt to decode them. Use
|
||||
* mdio45_ethtool_gset_npage() to specify advertisement bits from next
|
||||
* pages.
|
||||
*/
|
||||
static inline void mdio45_ethtool_gset(const struct mdio_if_info *mdio,
|
||||
struct ethtool_cmd *ecmd)
|
||||
{
|
||||
mdio45_ethtool_gset_npage(mdio, ecmd, 0, 0);
|
||||
}
|
||||
|
||||
extern int mdio_mii_ioctl(const struct mdio_if_info *mdio,
|
||||
struct mii_ioctl_data *mii_data, int cmd);
|
||||
|
||||
#endif /* __KERNEL__ */
|
||||
#endif /* __LINUX_MDIO_H__ */
|
||||
|
|
|
|||
Loading…
Reference in New Issue
Block a user