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alistair23-linux/drivers/net/phy/marvell10g.c
Antoine Tenart 952b6b3b07 net: phy: marvell10g: fix the PHY id mask 
The Marvell 10G PHY driver supports different hardware revisions, which
have their bits 3..0 differing. To get the correct revision number these
bits should be ignored. This patch fixes this by using the already
defined MARVELL_PHY_ID_MASK (0xfffffff0) instead of the custom
0xffffffff mask.

Fixes: 20b2af32ff ("net: phy: add Marvell Alaska X 88X3310 10Gigabit PHY support")
Suggested-by: Yan Markman <ymarkman@marvell.com>
Signed-off-by: Antoine Tenart <antoine.tenart@free-electrons.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
2017-11-28 10:30:38 -05:00

370 lines
10 KiB
C
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/*
* Marvell 10G 88x3310 PHY driver
*
* Based upon the ID registers, this PHY appears to be a mixture of IPs
* from two different companies.
*
* There appears to be several different data paths through the PHY which
* are automatically managed by the PHY. The following has been determined
* via observation and experimentation:
*
* SGMII PHYXS -- BASE-T PCS -- 10G PMA -- AN -- Copper (for <= 1G)
* 10GBASE-KR PHYXS -- BASE-T PCS -- 10G PMA -- AN -- Copper (for 10G)
* 10GBASE-KR PHYXS -- BASE-R PCS -- Fiber
*
* If both the fiber and copper ports are connected, the first to gain
* link takes priority and the other port is completely locked out.
*/
#include <linux/phy.h>
#include <linux/marvell_phy.h>
enum {
MV_PCS_BASE_T = 0x0000,
MV_PCS_BASE_R = 0x1000,
MV_PCS_1000BASEX = 0x2000,
/* These registers appear at 0x800X and 0xa00X - the 0xa00X control
* registers appear to set themselves to the 0x800X when AN is
* restarted, but status registers appear readable from either.
*/
MV_AN_CTRL1000 = 0x8000, /* 1000base-T control register */
MV_AN_STAT1000 = 0x8001, /* 1000base-T status register */
/* This register appears to reflect the copper status */
MV_AN_RESULT = 0xa016,
MV_AN_RESULT_SPD_10 = BIT(12),
MV_AN_RESULT_SPD_100 = BIT(13),
MV_AN_RESULT_SPD_1000 = BIT(14),
MV_AN_RESULT_SPD_10000 = BIT(15),
};
static int mv3310_modify(struct phy_device *phydev, int devad, u16 reg,
u16 mask, u16 bits)
{
int old, val, ret;
old = phy_read_mmd(phydev, devad, reg);
if (old < 0)
return old;
val = (old & ~mask) | (bits & mask);
if (val == old)
return 0;
ret = phy_write_mmd(phydev, devad, reg, val);
return ret < 0 ? ret : 1;
}
static int mv3310_probe(struct phy_device *phydev)
{
u32 mmd_mask = MDIO_DEVS_PMAPMD | MDIO_DEVS_AN;
if (!phydev->is_c45 ||
(phydev->c45_ids.devices_in_package & mmd_mask) != mmd_mask)
return -ENODEV;
return 0;
}
/*
* Resetting the MV88X3310 causes it to become non-responsive. Avoid
* setting the reset bit(s).
*/
static int mv3310_soft_reset(struct phy_device *phydev)
{
return 0;
}
static int mv3310_config_init(struct phy_device *phydev)
{
__ETHTOOL_DECLARE_LINK_MODE_MASK(supported) = { 0, };
u32 mask;
int val;
/* Check that the PHY interface type is compatible */
if (phydev->interface != PHY_INTERFACE_MODE_SGMII &&
phydev->interface != PHY_INTERFACE_MODE_XGMII &&
phydev->interface != PHY_INTERFACE_MODE_XAUI &&
phydev->interface != PHY_INTERFACE_MODE_RXAUI &&
phydev->interface != PHY_INTERFACE_MODE_10GKR)
return -ENODEV;
__set_bit(ETHTOOL_LINK_MODE_Pause_BIT, supported);
__set_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, supported);
if (phydev->c45_ids.devices_in_package & MDIO_DEVS_AN) {
val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_STAT1);
if (val < 0)
return val;
if (val & MDIO_AN_STAT1_ABLE)
__set_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, supported);
}
val = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_STAT2);
if (val < 0)
return val;
/* Ethtool does not support the WAN mode bits */
if (val & (MDIO_PMA_STAT2_10GBSR | MDIO_PMA_STAT2_10GBLR |
MDIO_PMA_STAT2_10GBER | MDIO_PMA_STAT2_10GBLX4 |
MDIO_PMA_STAT2_10GBSW | MDIO_PMA_STAT2_10GBLW |
MDIO_PMA_STAT2_10GBEW))
__set_bit(ETHTOOL_LINK_MODE_FIBRE_BIT, supported);
if (val & MDIO_PMA_STAT2_10GBSR)
__set_bit(ETHTOOL_LINK_MODE_10000baseSR_Full_BIT, supported);
if (val & MDIO_PMA_STAT2_10GBLR)
__set_bit(ETHTOOL_LINK_MODE_10000baseLR_Full_BIT, supported);
if (val & MDIO_PMA_STAT2_10GBER)
__set_bit(ETHTOOL_LINK_MODE_10000baseER_Full_BIT, supported);
if (val & MDIO_PMA_STAT2_EXTABLE) {
val = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_PMA_EXTABLE);
if (val < 0)
return val;
if (val & (MDIO_PMA_EXTABLE_10GBT | MDIO_PMA_EXTABLE_1000BT |
MDIO_PMA_EXTABLE_100BTX | MDIO_PMA_EXTABLE_10BT))
__set_bit(ETHTOOL_LINK_MODE_TP_BIT, supported);
if (val & MDIO_PMA_EXTABLE_10GBLRM)
__set_bit(ETHTOOL_LINK_MODE_FIBRE_BIT, supported);
if (val & (MDIO_PMA_EXTABLE_10GBKX4 | MDIO_PMA_EXTABLE_10GBKR |
MDIO_PMA_EXTABLE_1000BKX))
__set_bit(ETHTOOL_LINK_MODE_Backplane_BIT, supported);
if (val & MDIO_PMA_EXTABLE_10GBLRM)
__set_bit(ETHTOOL_LINK_MODE_10000baseLRM_Full_BIT,
supported);
if (val & MDIO_PMA_EXTABLE_10GBT)
__set_bit(ETHTOOL_LINK_MODE_10000baseT_Full_BIT,
supported);
if (val & MDIO_PMA_EXTABLE_10GBKX4)
__set_bit(ETHTOOL_LINK_MODE_10000baseKX4_Full_BIT,
supported);
if (val & MDIO_PMA_EXTABLE_10GBKR)
__set_bit(ETHTOOL_LINK_MODE_10000baseKR_Full_BIT,
supported);
if (val & MDIO_PMA_EXTABLE_1000BT)
__set_bit(ETHTOOL_LINK_MODE_1000baseT_Full_BIT,
supported);
if (val & MDIO_PMA_EXTABLE_1000BKX)
__set_bit(ETHTOOL_LINK_MODE_1000baseKX_Full_BIT,
supported);
if (val & MDIO_PMA_EXTABLE_100BTX)
__set_bit(ETHTOOL_LINK_MODE_100baseT_Full_BIT,
supported);
if (val & MDIO_PMA_EXTABLE_10BT)
__set_bit(ETHTOOL_LINK_MODE_10baseT_Full_BIT,
supported);
}
if (!ethtool_convert_link_mode_to_legacy_u32(&mask, supported))
dev_warn(&phydev->mdio.dev,
"PHY supports (%*pb) more modes than phylib supports, some modes not supported.\n",
__ETHTOOL_LINK_MODE_MASK_NBITS, supported);
phydev->supported &= mask;
phydev->advertising &= phydev->supported;
return 0;
}
static int mv3310_config_aneg(struct phy_device *phydev)
{
bool changed = false;
u32 advertising;
int ret;
if (phydev->autoneg == AUTONEG_DISABLE) {
ret = genphy_c45_pma_setup_forced(phydev);
if (ret < 0)
return ret;
return genphy_c45_an_disable_aneg(phydev);
}
phydev->advertising &= phydev->supported;
advertising = phydev->advertising;
ret = mv3310_modify(phydev, MDIO_MMD_AN, MDIO_AN_ADVERTISE,
ADVERTISE_ALL | ADVERTISE_100BASE4 |
ADVERTISE_PAUSE_CAP | ADVERTISE_PAUSE_ASYM,
ethtool_adv_to_mii_adv_t(advertising));
if (ret < 0)
return ret;
if (ret > 0)
changed = true;
ret = mv3310_modify(phydev, MDIO_MMD_AN, MV_AN_CTRL1000,
ADVERTISE_1000FULL | ADVERTISE_1000HALF,
ethtool_adv_to_mii_ctrl1000_t(advertising));
if (ret < 0)
return ret;
if (ret > 0)
changed = true;
/* 10G control register */
ret = mv3310_modify(phydev, MDIO_MMD_AN, MDIO_AN_10GBT_CTRL,
MDIO_AN_10GBT_CTRL_ADV10G,
advertising & ADVERTISED_10000baseT_Full ?
MDIO_AN_10GBT_CTRL_ADV10G : 0);
if (ret < 0)
return ret;
if (ret > 0)
changed = true;
if (changed)
ret = genphy_c45_restart_aneg(phydev);
return ret;
}
static int mv3310_aneg_done(struct phy_device *phydev)
{
int val;
val = phy_read_mmd(phydev, MDIO_MMD_PCS, MV_PCS_BASE_R + MDIO_STAT1);
if (val < 0)
return val;
if (val & MDIO_STAT1_LSTATUS)
return 1;
return genphy_c45_aneg_done(phydev);
}
/* 10GBASE-ER,LR,LRM,SR do not support autonegotiation. */
static int mv3310_read_10gbr_status(struct phy_device *phydev)
{
phydev->link = 1;
phydev->speed = SPEED_10000;
phydev->duplex = DUPLEX_FULL;
if (phydev->interface == PHY_INTERFACE_MODE_SGMII)
phydev->interface = PHY_INTERFACE_MODE_10GKR;
return 0;
}
static int mv3310_read_status(struct phy_device *phydev)
{
u32 mmd_mask = phydev->c45_ids.devices_in_package;
int val;
/* The vendor devads do not report link status. Avoid the PHYXS
* instance as there are three, and its status depends on the MAC
* being appropriately configured for the negotiated speed.
*/
mmd_mask &= ~(BIT(MDIO_MMD_VEND1) | BIT(MDIO_MMD_VEND2) |
BIT(MDIO_MMD_PHYXS));
phydev->speed = SPEED_UNKNOWN;
phydev->duplex = DUPLEX_UNKNOWN;
phydev->lp_advertising = 0;
phydev->link = 0;
phydev->pause = 0;
phydev->asym_pause = 0;
val = phy_read_mmd(phydev, MDIO_MMD_PCS, MV_PCS_BASE_R + MDIO_STAT1);
if (val < 0)
return val;
if (val & MDIO_STAT1_LSTATUS)
return mv3310_read_10gbr_status(phydev);
val = genphy_c45_read_link(phydev, mmd_mask);
if (val < 0)
return val;
phydev->link = val > 0 ? 1 : 0;
val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_STAT1);
if (val < 0)
return val;
if (val & MDIO_AN_STAT1_COMPLETE) {
val = genphy_c45_read_lpa(phydev);
if (val < 0)
return val;
/* Read the link partner's 1G advertisment */
val = phy_read_mmd(phydev, MDIO_MMD_AN, MV_AN_STAT1000);
if (val < 0)
return val;
phydev->lp_advertising |= mii_stat1000_to_ethtool_lpa_t(val);
if (phydev->autoneg == AUTONEG_ENABLE) {
val = phy_read_mmd(phydev, MDIO_MMD_AN, MV_AN_RESULT);
if (val < 0)
return val;
if (val & MV_AN_RESULT_SPD_10000)
phydev->speed = SPEED_10000;
else if (val & MV_AN_RESULT_SPD_1000)
phydev->speed = SPEED_1000;
else if (val & MV_AN_RESULT_SPD_100)
phydev->speed = SPEED_100;
else if (val & MV_AN_RESULT_SPD_10)
phydev->speed = SPEED_10;
phydev->duplex = DUPLEX_FULL;
}
}
if (phydev->autoneg != AUTONEG_ENABLE) {
val = genphy_c45_read_pma(phydev);
if (val < 0)
return val;
}
if ((phydev->interface == PHY_INTERFACE_MODE_SGMII ||
phydev->interface == PHY_INTERFACE_MODE_10GKR) && phydev->link) {
/* The PHY automatically switches its serdes interface (and
* active PHYXS instance) between Cisco SGMII and 10GBase-KR
* modes according to the speed. Florian suggests setting
* phydev->interface to communicate this to the MAC. Only do
* this if we are already in either SGMII or 10GBase-KR mode.
*/
if (phydev->speed == SPEED_10000)
phydev->interface = PHY_INTERFACE_MODE_10GKR;
else if (phydev->speed >= SPEED_10 &&
phydev->speed < SPEED_10000)
phydev->interface = PHY_INTERFACE_MODE_SGMII;
}
return 0;
}
static struct phy_driver mv3310_drivers[] = {
{
.phy_id = 0x002b09aa,
.phy_id_mask = MARVELL_PHY_ID_MASK,
.name = "mv88x3310",
.features = SUPPORTED_10baseT_Full |
SUPPORTED_100baseT_Full |
SUPPORTED_1000baseT_Full |
SUPPORTED_Autoneg |
SUPPORTED_TP |
SUPPORTED_FIBRE |
SUPPORTED_10000baseT_Full |
SUPPORTED_Backplane,
.probe = mv3310_probe,
.soft_reset = mv3310_soft_reset,
.config_init = mv3310_config_init,
.config_aneg = mv3310_config_aneg,
.aneg_done = mv3310_aneg_done,
.read_status = mv3310_read_status,
},
};
module_phy_driver(mv3310_drivers);
static struct mdio_device_id __maybe_unused mv3310_tbl[] = {
{ 0x002b09aa, MARVELL_PHY_ID_MASK },
{ },
};
MODULE_DEVICE_TABLE(mdio, mv3310_tbl);
MODULE_DESCRIPTION("Marvell Alaska X 10Gigabit Ethernet PHY driver (MV88X3310)");
MODULE_LICENSE("GPL");
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