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>hifive-unleashed-5.1
Ben Hutchings
David S. Miller
parent
52c94dfae1
commit
1b1c2e9510
|
|
@ -2443,6 +2443,9 @@ menuconfig NETDEV_10000
|
|||
|
||||
if NETDEV_10000
|
||||
|
||||
config MDIO
|
||||
tristate
|
||||
|
||||
config CHELSIO_T1
|
||||
tristate "Chelsio 10Gb Ethernet support"
|
||||
depends on PCI
|
||||
|
|
|
|||
|
|
@ -95,6 +95,7 @@ obj-$(CONFIG_SH_ETH) += sh_eth.o
|
|||
#
|
||||
|
||||
obj-$(CONFIG_MII) += mii.o
|
||||
obj-$(CONFIG_MDIO) += mdio.o
|
||||
obj-$(CONFIG_PHYLIB) += phy/
|
||||
|
||||
obj-$(CONFIG_SUNDANCE) += sundance.o
|
||||
|
|
|
|||
|
|
@ -0,0 +1,359 @@
|
|||
/*
|
||||
* mdio.c: Generic support for MDIO-compatible transceivers
|
||||
* Copyright 2006-2009 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.
|
||||
*/
|
||||
|
||||
#include <linux/kernel.h>
|
||||
#include <linux/capability.h>
|
||||
#include <linux/errno.h>
|
||||
#include <linux/ethtool.h>
|
||||
#include <linux/mdio.h>
|
||||
#include <linux/module.h>
|
||||
|
||||
/**
|
||||
* mdio45_probe - probe for an MDIO (clause 45) device
|
||||
* @mdio: MDIO interface
|
||||
* @prtad: Expected PHY address
|
||||
*
|
||||
* This sets @prtad and @mmds in the MDIO interface if successful.
|
||||
* Returns 0 on success, negative on error.
|
||||
*/
|
||||
int mdio45_probe(struct mdio_if_info *mdio, int prtad)
|
||||
{
|
||||
int mmd, stat2, devs1, devs2;
|
||||
|
||||
/* Assume PHY must have at least one of PMA/PMD, WIS, PCS, PHY
|
||||
* XS or DTE XS; give up if none is present. */
|
||||
for (mmd = 1; mmd <= 5; mmd++) {
|
||||
/* Is this MMD present? */
|
||||
stat2 = mdio->mdio_read(mdio->dev, prtad, mmd, MDIO_STAT2);
|
||||
if (stat2 < 0 ||
|
||||
(stat2 & MDIO_STAT2_DEVPRST) != MDIO_STAT2_DEVPRST_VAL)
|
||||
continue;
|
||||
|
||||
/* It should tell us about all the other MMDs */
|
||||
devs1 = mdio->mdio_read(mdio->dev, prtad, mmd, MDIO_DEVS1);
|
||||
devs2 = mdio->mdio_read(mdio->dev, prtad, mmd, MDIO_DEVS2);
|
||||
if (devs1 < 0 || devs2 < 0)
|
||||
continue;
|
||||
|
||||
mdio->prtad = prtad;
|
||||
mdio->mmds = devs1 | (devs2 << 16);
|
||||
return 0;
|
||||
}
|
||||
|
||||
return -ENODEV;
|
||||
}
|
||||
EXPORT_SYMBOL(mdio45_probe);
|
||||
|
||||
/**
|
||||
* mdio_set_flag - set or clear flag in an MDIO register
|
||||
* @mdio: MDIO interface
|
||||
* @prtad: PHY address
|
||||
* @devad: MMD address
|
||||
* @addr: Register address
|
||||
* @mask: Mask for flag (single bit set)
|
||||
* @sense: New value of flag
|
||||
*
|
||||
* This debounces changes: it does not write the register if the flag
|
||||
* already has the proper value. Returns 0 on success, negative on error.
|
||||
*/
|
||||
int mdio_set_flag(const struct mdio_if_info *mdio,
|
||||
int prtad, int devad, u16 addr, int mask,
|
||||
bool sense)
|
||||
{
|
||||
int old_val = mdio->mdio_read(mdio->dev, prtad, devad, addr);
|
||||
int new_val;
|
||||
|
||||
if (old_val < 0)
|
||||
return old_val;
|
||||
if (sense)
|
||||
new_val = old_val | mask;
|
||||
else
|
||||
new_val = old_val & ~mask;
|
||||
if (old_val == new_val)
|
||||
return 0;
|
||||
return mdio->mdio_write(mdio->dev, prtad, devad, addr, new_val);
|
||||
}
|
||||
EXPORT_SYMBOL(mdio_set_flag);
|
||||
|
||||
/**
|
||||
* mdio_link_ok - is link status up/OK
|
||||
* @mdio: MDIO interface
|
||||
* @mmd_mask: Mask for MMDs to check
|
||||
*
|
||||
* Returns 1 if the PHY reports link status up/OK, 0 otherwise.
|
||||
* @mmd_mask is normally @mdio->mmds, but if loopback is enabled
|
||||
* the MMDs being bypassed should be excluded from the mask.
|
||||
*/
|
||||
int mdio45_links_ok(const struct mdio_if_info *mdio, u32 mmd_mask)
|
||||
{
|
||||
int devad, reg;
|
||||
|
||||
if (!mmd_mask) {
|
||||
/* Use absence of XGMII faults in lieu of link state */
|
||||
reg = mdio->mdio_read(mdio->dev, mdio->prtad,
|
||||
MDIO_MMD_PHYXS, MDIO_STAT2);
|
||||
return reg >= 0 && !(reg & MDIO_STAT2_RXFAULT);
|
||||
}
|
||||
|
||||
for (devad = 0; mmd_mask; devad++) {
|
||||
if (mmd_mask & (1 << devad)) {
|
||||
mmd_mask &= ~(1 << devad);
|
||||
|
||||
/* Read twice because link state is latched and a
|
||||
* read moves the current state into the register */
|
||||
mdio->mdio_read(mdio->dev, mdio->prtad,
|
||||
devad, MDIO_STAT1);
|
||||
reg = mdio->mdio_read(mdio->dev, mdio->prtad,
|
||||
devad, MDIO_STAT1);
|
||||
if (reg < 0 || !(reg & MDIO_STAT1_LSTATUS))
|
||||
return false;
|
||||
}
|
||||
}
|
||||
|
||||
return true;
|
||||
}
|
||||
EXPORT_SYMBOL(mdio45_links_ok);
|
||||
|
||||
/**
|
||||
* mdio45_nway_restart - restart auto-negotiation for this interface
|
||||
* @mdio: MDIO interface
|
||||
*
|
||||
* Returns 0 on success, negative on error.
|
||||
*/
|
||||
int mdio45_nway_restart(const struct mdio_if_info *mdio)
|
||||
{
|
||||
if (!(mdio->mmds & MDIO_DEVS_AN))
|
||||
return -EOPNOTSUPP;
|
||||
|
||||
mdio_set_flag(mdio, mdio->prtad, MDIO_MMD_AN, MDIO_CTRL1,
|
||||
MDIO_AN_CTRL1_RESTART, true);
|
||||
return 0;
|
||||
}
|
||||
EXPORT_SYMBOL(mdio45_nway_restart);
|
||||
|
||||
static u32 mdio45_get_an(const struct mdio_if_info *mdio, u16 addr)
|
||||
{
|
||||
u32 result = 0;
|
||||
int reg;
|
||||
|
||||
reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_AN, addr);
|
||||
if (reg & ADVERTISE_10HALF)
|
||||
result |= ADVERTISED_10baseT_Half;
|
||||
if (reg & ADVERTISE_10FULL)
|
||||
result |= ADVERTISED_10baseT_Full;
|
||||
if (reg & ADVERTISE_100HALF)
|
||||
result |= ADVERTISED_100baseT_Half;
|
||||
if (reg & ADVERTISE_100FULL)
|
||||
result |= ADVERTISED_100baseT_Full;
|
||||
return result;
|
||||
}
|
||||
|
||||
/**
|
||||
* mdio45_ethtool_gset_npage - get settings for ETHTOOL_GSET
|
||||
* @mdio: MDIO interface
|
||||
* @ecmd: Ethtool request structure
|
||||
* @npage_adv: Modes currently advertised on next pages
|
||||
* @npage_lpa: Modes advertised by link partner on next pages
|
||||
*
|
||||
* Since the CSRs for auto-negotiation using next pages are not fully
|
||||
* standardised, this function does not attempt to decode them. The
|
||||
* caller must pass them in.
|
||||
*/
|
||||
void mdio45_ethtool_gset_npage(const struct mdio_if_info *mdio,
|
||||
struct ethtool_cmd *ecmd,
|
||||
u32 npage_adv, u32 npage_lpa)
|
||||
{
|
||||
int reg;
|
||||
|
||||
ecmd->transceiver = XCVR_INTERNAL;
|
||||
ecmd->phy_address = mdio->prtad;
|
||||
|
||||
reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
|
||||
MDIO_CTRL2);
|
||||
switch (reg & MDIO_PMA_CTRL2_TYPE) {
|
||||
case MDIO_PMA_CTRL2_10GBT:
|
||||
case MDIO_PMA_CTRL2_1000BT:
|
||||
case MDIO_PMA_CTRL2_100BTX:
|
||||
case MDIO_PMA_CTRL2_10BT:
|
||||
ecmd->port = PORT_TP;
|
||||
ecmd->supported = SUPPORTED_TP;
|
||||
reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
|
||||
MDIO_SPEED);
|
||||
if (reg & MDIO_SPEED_10G)
|
||||
ecmd->supported |= SUPPORTED_10000baseT_Full;
|
||||
if (reg & MDIO_PMA_SPEED_1000)
|
||||
ecmd->supported |= (SUPPORTED_1000baseT_Full |
|
||||
SUPPORTED_1000baseT_Half);
|
||||
if (reg & MDIO_PMA_SPEED_100)
|
||||
ecmd->supported |= (SUPPORTED_100baseT_Full |
|
||||
SUPPORTED_100baseT_Half);
|
||||
if (reg & MDIO_PMA_SPEED_10)
|
||||
ecmd->supported |= (SUPPORTED_10baseT_Full |
|
||||
SUPPORTED_10baseT_Half);
|
||||
ecmd->advertising = ADVERTISED_TP;
|
||||
break;
|
||||
|
||||
case MDIO_PMA_CTRL2_10GBCX4:
|
||||
case MDIO_PMA_CTRL2_10GBKX4:
|
||||
case MDIO_PMA_CTRL2_10GBKR:
|
||||
case MDIO_PMA_CTRL2_1000BKX:
|
||||
ecmd->port = PORT_OTHER;
|
||||
ecmd->supported = 0;
|
||||
ecmd->advertising = 0;
|
||||
break;
|
||||
|
||||
/* All the other defined modes are flavours of optical */
|
||||
default:
|
||||
ecmd->port = PORT_FIBRE;
|
||||
ecmd->supported = SUPPORTED_FIBRE;
|
||||
ecmd->advertising = ADVERTISED_FIBRE;
|
||||
break;
|
||||
}
|
||||
|
||||
if (mdio->mmds & MDIO_DEVS_AN) {
|
||||
ecmd->supported |= SUPPORTED_Autoneg;
|
||||
reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_AN,
|
||||
MDIO_CTRL1);
|
||||
if (reg & MDIO_AN_CTRL1_ENABLE) {
|
||||
ecmd->autoneg = AUTONEG_ENABLE;
|
||||
ecmd->advertising |=
|
||||
ADVERTISED_Autoneg |
|
||||
mdio45_get_an(mdio, MDIO_AN_ADVERTISE) |
|
||||
npage_adv;
|
||||
} else {
|
||||
ecmd->autoneg = AUTONEG_DISABLE;
|
||||
}
|
||||
} else {
|
||||
ecmd->autoneg = AUTONEG_DISABLE;
|
||||
}
|
||||
|
||||
if (ecmd->autoneg) {
|
||||
u32 modes = 0;
|
||||
|
||||
/* If AN is complete and successful, report best common
|
||||
* mode, otherwise report best advertised mode. */
|
||||
if (mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_AN,
|
||||
MDIO_STAT1) &
|
||||
MDIO_AN_STAT1_COMPLETE)
|
||||
modes = (ecmd->advertising &
|
||||
(mdio45_get_an(mdio, MDIO_AN_LPA) |
|
||||
npage_lpa));
|
||||
if (modes == 0)
|
||||
modes = ecmd->advertising;
|
||||
|
||||
if (modes & ADVERTISED_10000baseT_Full) {
|
||||
ecmd->speed = SPEED_10000;
|
||||
ecmd->duplex = DUPLEX_FULL;
|
||||
} else if (modes & (ADVERTISED_1000baseT_Full |
|
||||
ADVERTISED_1000baseT_Half)) {
|
||||
ecmd->speed = SPEED_1000;
|
||||
ecmd->duplex = !!(modes & ADVERTISED_1000baseT_Full);
|
||||
} else if (modes & (ADVERTISED_100baseT_Full |
|
||||
ADVERTISED_100baseT_Half)) {
|
||||
ecmd->speed = SPEED_100;
|
||||
ecmd->duplex = !!(modes & ADVERTISED_100baseT_Full);
|
||||
} else {
|
||||
ecmd->speed = SPEED_10;
|
||||
ecmd->duplex = !!(modes & ADVERTISED_10baseT_Full);
|
||||
}
|
||||
} else {
|
||||
/* Report forced settings */
|
||||
reg = mdio->mdio_read(mdio->dev, mdio->prtad, MDIO_MMD_PMAPMD,
|
||||
MDIO_CTRL1);
|
||||
ecmd->speed = (((reg & MDIO_PMA_CTRL1_SPEED1000) ? 100 : 1) *
|
||||
((reg & MDIO_PMA_CTRL1_SPEED100) ? 100 : 10));
|
||||
ecmd->duplex = (reg & MDIO_CTRL1_FULLDPLX ||
|
||||
ecmd->speed == SPEED_10000);
|
||||
}
|
||||
}
|
||||
EXPORT_SYMBOL(mdio45_ethtool_gset_npage);
|
||||
|
||||
/**
|
||||
* mdio_mii_ioctl - MII ioctl interface for MDIO (clause 22 or 45) PHYs
|
||||
* @mdio: MDIO interface
|
||||
* @mii_data: MII ioctl data structure
|
||||
* @cmd: MII ioctl command
|
||||
*
|
||||
* Returns 0 on success, negative on error.
|
||||
*/
|
||||
int mdio_mii_ioctl(const struct mdio_if_info *mdio,
|
||||
struct mii_ioctl_data *mii_data, int cmd)
|
||||
{
|
||||
int prtad, devad;
|
||||
u16 addr = mii_data->reg_num;
|
||||
|
||||
/* Validate/convert cmd to one of SIOC{G,S}MIIREG */
|
||||
switch (cmd) {
|
||||
case SIOCGMIIPHY:
|
||||
if (mdio->prtad == MDIO_PRTAD_NONE)
|
||||
return -EOPNOTSUPP;
|
||||
mii_data->phy_id = mdio->prtad;
|
||||
cmd = SIOCGMIIREG;
|
||||
break;
|
||||
case SIOCGMIIREG:
|
||||
break;
|
||||
case SIOCSMIIREG:
|
||||
if (!capable(CAP_NET_ADMIN))
|
||||
return -EPERM;
|
||||
break;
|
||||
default:
|
||||
return -EOPNOTSUPP;
|
||||
}
|
||||
|
||||
/* Validate/convert phy_id */
|
||||
if ((mdio->mode_support & MDIO_SUPPORTS_C45) &&
|
||||
mdio_phy_id_is_c45(mii_data->phy_id)) {
|
||||
prtad = mdio_phy_id_prtad(mii_data->phy_id);
|
||||
devad = mdio_phy_id_devad(mii_data->phy_id);
|
||||
} else if ((mdio->mode_support & MDIO_SUPPORTS_C22) &&
|
||||
mii_data->phy_id < 0x20) {
|
||||
prtad = mii_data->phy_id;
|
||||
devad = MDIO_DEVAD_NONE;
|
||||
addr &= 0x1f;
|
||||
} else if ((mdio->mode_support & MDIO_EMULATE_C22) &&
|
||||
mdio->prtad != MDIO_PRTAD_NONE &&
|
||||
mii_data->phy_id == mdio->prtad) {
|
||||
/* Remap commonly-used MII registers. */
|
||||
prtad = mdio->prtad;
|
||||
switch (addr) {
|
||||
case MII_BMCR:
|
||||
case MII_BMSR:
|
||||
case MII_PHYSID1:
|
||||
case MII_PHYSID2:
|
||||
devad = __ffs(mdio->mmds);
|
||||
break;
|
||||
case MII_ADVERTISE:
|
||||
case MII_LPA:
|
||||
if (!(mdio->mmds & MDIO_DEVS_AN))
|
||||
return -EINVAL;
|
||||
devad = MDIO_MMD_AN;
|
||||
if (addr == MII_ADVERTISE)
|
||||
addr = MDIO_AN_ADVERTISE;
|
||||
else
|
||||
addr = MDIO_AN_LPA;
|
||||
break;
|
||||
default:
|
||||
return -EINVAL;
|
||||
}
|
||||
} else {
|
||||
return -EINVAL;
|
||||
}
|
||||
|
||||
if (cmd == SIOCGMIIREG) {
|
||||
int rc = mdio->mdio_read(mdio->dev, prtad, devad, addr);
|
||||
if (rc < 0)
|
||||
return rc;
|
||||
mii_data->val_out = rc;
|
||||
return 0;
|
||||
} else {
|
||||
return mdio->mdio_write(mdio->dev, prtad, devad, addr,
|
||||
mii_data->val_in);
|
||||
}
|
||||
}
|
||||
EXPORT_SYMBOL(mdio_mii_ioctl);
|
||||
|
|
@ -234,4 +234,70 @@ static inline __u16 mdio_phy_id_devad(int phy_id)
|
|||
return phy_id & MDIO_PHY_ID_DEVAD;
|
||||
}
|
||||
|
||||
#ifdef __KERNEL__
|
||||
|
||||
/**
|
||||
* struct mdio_if_info - Ethernet controller MDIO interface
|
||||
* @prtad: PRTAD of the PHY (%MDIO_PRTAD_NONE if not present/unknown)
|
||||
* @mmds: Mask of MMDs expected to be present in the PHY. This must be
|
||||
* non-zero unless @prtad = %MDIO_PRTAD_NONE.
|
||||
* @mode_support: MDIO modes supported. If %MDIO_SUPPORTS_C22 is set then
|
||||
* MII register access will be passed through with @devad =
|
||||
* %MDIO_DEVAD_NONE. If %MDIO_EMULATE_C22 is set then access to
|
||||
* commonly used clause 22 registers will be translated into
|
||||
* clause 45 registers.
|
||||
* @dev: Net device structure
|
||||
* @mdio_read: Register read function; returns value or negative error code
|
||||
* @mdio_write: Register write function; returns 0 or negative error code
|
||||
*/
|
||||
struct mdio_if_info {
|
||||
int prtad;
|
||||
u32 __bitwise mmds;
|
||||
unsigned mode_support;
|
||||
|
||||
struct net_device *dev;
|
||||
int (*mdio_read)(struct net_device *dev, int prtad, int devad,
|
||||
u16 addr);
|
||||
int (*mdio_write)(struct net_device *dev, int prtad, int devad,
|
||||
u16 addr, u16 val);
|
||||
};
|
||||
|
||||
#define MDIO_PRTAD_NONE (-1)
|
||||
#define MDIO_DEVAD_NONE (-1)
|
||||
#define MDIO_SUPPORTS_C22 1
|
||||
#define MDIO_SUPPORTS_C45 2
|
||||
#define MDIO_EMULATE_C22 4
|
||||
|
||||
struct ethtool_cmd;
|
||||
struct ethtool_pauseparam;
|
||||
extern int mdio45_probe(struct mdio_if_info *mdio, int prtad);
|
||||
extern int mdio_set_flag(const struct mdio_if_info *mdio,
|
||||
int prtad, int devad, u16 addr, int mask,
|
||||
bool sense);
|
||||
extern int mdio45_links_ok(const struct mdio_if_info *mdio, u32 mmds);
|
||||
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