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/*
* Core PHY library, taken from phy.c
*
* This program is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the
* Free Software Foundation; either version 2 of the License, or (at your
* option) any later version.
*/
#include <linux/export.h>
#include <linux/phy.h>
const char *phy_speed_to_str(int speed)
{
switch (speed) {
case SPEED_10:
return "10Mbps";
case SPEED_100:
return "100Mbps";
case SPEED_1000:
return "1Gbps";
case SPEED_2500:
return "2.5Gbps";
case SPEED_10000:
return "10Gbps";
case SPEED_UNKNOWN:
return "Unknown";
default:
return "Unsupported (update phy-core.c)";
}
}
EXPORT_SYMBOL_GPL(phy_speed_to_str);
const char *phy_duplex_to_str(unsigned int duplex)
{
if (duplex == DUPLEX_HALF)
return "Half";
if (duplex == DUPLEX_FULL)
return "Full";
if (duplex == DUPLEX_UNKNOWN)
return "Unknown";
return "Unsupported (update phy-core.c)";
}
EXPORT_SYMBOL_GPL(phy_duplex_to_str);
/* A mapping of all SUPPORTED settings to speed/duplex. This table
* must be grouped by speed and sorted in descending match priority
* - iow, descending speed. */
static const struct phy_setting settings[] = {
{
.speed = SPEED_10000,
.duplex = DUPLEX_FULL,
.bit = ETHTOOL_LINK_MODE_10000baseKR_Full_BIT,
},
{
.speed = SPEED_10000,
.duplex = DUPLEX_FULL,
.bit = ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT,
},
{
.speed = SPEED_10000,
.duplex = DUPLEX_FULL,
.bit = ETHTOOL_LINK_MODE_10000baseT_Full_BIT,
},
{
.speed = SPEED_2500,
.duplex = DUPLEX_FULL,
.bit = ETHTOOL_LINK_MODE_2500baseX_Full_BIT,
},
{
.speed = SPEED_1000,
.duplex = DUPLEX_FULL,
.bit = ETHTOOL_LINK_MODE_1000baseKX_Full_BIT,
},
{
.speed = SPEED_1000,
.duplex = DUPLEX_FULL,
.bit = ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
},
{
.speed = SPEED_1000,
.duplex = DUPLEX_HALF,
.bit = ETHTOOL_LINK_MODE_1000baseT_Half_BIT,
},
{
.speed = SPEED_100,
.duplex = DUPLEX_FULL,
.bit = ETHTOOL_LINK_MODE_100baseT_Full_BIT,
},
{
.speed = SPEED_100,
.duplex = DUPLEX_HALF,
.bit = ETHTOOL_LINK_MODE_100baseT_Half_BIT,
},
{
.speed = SPEED_10,
.duplex = DUPLEX_FULL,
.bit = ETHTOOL_LINK_MODE_10baseT_Full_BIT,
},
{
.speed = SPEED_10,
.duplex = DUPLEX_HALF,
.bit = ETHTOOL_LINK_MODE_10baseT_Half_BIT,
},
};
/**
* phy_lookup_setting - lookup a PHY setting
* @speed: speed to match
* @duplex: duplex to match
* @mask: allowed link modes
* @maxbit: bit size of link modes
* @exact: an exact match is required
*
* Search the settings array for a setting that matches the speed and
* duplex, and which is supported.
*
* If @exact is unset, either an exact match or %NULL for no match will
* be returned.
*
* If @exact is set, an exact match, the fastest supported setting at
* or below the specified speed, the slowest supported setting, or if
* they all fail, %NULL will be returned.
*/
const struct phy_setting *
phy_lookup_setting(int speed, int duplex, const unsigned long *mask,
size_t maxbit, bool exact)
{
const struct phy_setting *p, *match = NULL, *last = NULL;
int i;
for (i = 0, p = settings; i < ARRAY_SIZE(settings); i++, p++) {
if (p->bit < maxbit && test_bit(p->bit, mask)) {
last = p;
if (p->speed == speed && p->duplex == duplex) {
/* Exact match for speed and duplex */
match = p;
break;
} else if (!exact) {
if (!match && p->speed <= speed)
/* Candidate */
match = p;
if (p->speed < speed)
break;
}
}
}
if (!match && !exact)
match = last;
return match;
}
EXPORT_SYMBOL_GPL(phy_lookup_setting);
size_t phy_speeds(unsigned int *speeds, size_t size,
unsigned long *mask, size_t maxbit)
{
size_t count;
int i;
for (i = 0, count = 0; i < ARRAY_SIZE(settings) && count < size; i++)
if (settings[i].bit < maxbit &&
test_bit(settings[i].bit, mask) &&
(count == 0 || speeds[count - 1] != settings[i].speed))
speeds[count++] = settings[i].speed;
return count;
}
static void mmd_phy_indirect(struct mii_bus *bus, int phy_addr, int devad,
u16 regnum)
{
/* Write the desired MMD Devad */
bus->write(bus, phy_addr, MII_MMD_CTRL, devad);
/* Write the desired MMD register address */
bus->write(bus, phy_addr, MII_MMD_DATA, regnum);
/* Select the Function : DATA with no post increment */
bus->write(bus, phy_addr, MII_MMD_CTRL, devad | MII_MMD_CTRL_NOINCR);
}
/**
* phy_read_mmd - Convenience function for reading a register
* from an MMD on a given PHY.
* @phydev: The phy_device struct
* @devad: The MMD to read from (0..31)
* @regnum: The register on the MMD to read (0..65535)
*
* Same rules as for phy_read();
*/
int phy_read_mmd(struct phy_device *phydev, int devad, u32 regnum)
{
int val;
if (regnum > (u16)~0 || devad > 32)
return -EINVAL;
if (phydev->drv->read_mmd) {
val = phydev->drv->read_mmd(phydev, devad, regnum);
} else if (phydev->is_c45) {
u32 addr = MII_ADDR_C45 | (devad << 16) | (regnum & 0xffff);
val = mdiobus_read(phydev->mdio.bus, phydev->mdio.addr, addr);
} else {
struct mii_bus *bus = phydev->mdio.bus;
int phy_addr = phydev->mdio.addr;
mutex_lock(&bus->mdio_lock);
mmd_phy_indirect(bus, phy_addr, devad, regnum);
/* Read the content of the MMD's selected register */
val = bus->read(bus, phy_addr, MII_MMD_DATA);
mutex_unlock(&bus->mdio_lock);
}
return val;
}
EXPORT_SYMBOL(phy_read_mmd);
/**
* phy_write_mmd - Convenience function for writing a register
* on an MMD on a given PHY.
* @phydev: The phy_device struct
* @devad: The MMD to read from
* @regnum: The register on the MMD to read
* @val: value to write to @regnum
*
* Same rules as for phy_write();
*/
int phy_write_mmd(struct phy_device *phydev, int devad, u32 regnum, u16 val)
{
int ret;
if (regnum > (u16)~0 || devad > 32)
return -EINVAL;
if (phydev->drv->read_mmd) {
ret = phydev->drv->write_mmd(phydev, devad, regnum, val);
} else if (phydev->is_c45) {
u32 addr = MII_ADDR_C45 | (devad << 16) | (regnum & 0xffff);
ret = mdiobus_write(phydev->mdio.bus, phydev->mdio.addr,
addr, val);
} else {
struct mii_bus *bus = phydev->mdio.bus;
int phy_addr = phydev->mdio.addr;
mutex_lock(&bus->mdio_lock);
mmd_phy_indirect(bus, phy_addr, devad, regnum);
/* Write the data into MMD's selected register */
bus->write(bus, phy_addr, MII_MMD_DATA, val);
mutex_unlock(&bus->mdio_lock);
ret = 0;
}
return ret;
}
EXPORT_SYMBOL(phy_write_mmd);
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