Commit 3da8ffd8 authored by Alexandru Tachici's avatar Alexandru Tachici Committed by David S. Miller

net: phy: Add 10BASE-T1L support in phy-c45

This patch is needed because the BASE-T1 uses different registers
for status, control and advertisement to those already
employed in the existing phy-c45 functions.

Where required, genphy_c45 functions will now check whether
the device supports BASE-T1 and use the specific registers
instead: 45.2.7.19 BASE-T1 AN control register,
45.2.7.20 BASE-T1 AN status, 45.2.7.21 BASE-T1 AN
advertisement register, 45.2.7.22 BASE-T1 AN LP Base
Page ability register, 45.2.1.185 BASE-T1 PMA/PMD control
register.
Tested-by: default avatarOleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: default avatarAlexandru Tachici <alexandru.tachici@analog.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 1b020e44
......@@ -8,6 +8,25 @@
#include <linux/mii.h>
#include <linux/phy.h>
/**
* genphy_c45_baset1_able - checks if the PMA has BASE-T1 extended abilities
* @phydev: target phy_device struct
*/
static bool genphy_c45_baset1_able(struct phy_device *phydev)
{
int val;
if (phydev->pma_extable == -ENODATA) {
val = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_PMA_EXTABLE);
if (val < 0)
return false;
phydev->pma_extable = val;
}
return !!(phydev->pma_extable & MDIO_PMA_EXTABLE_BT1);
}
/**
* genphy_c45_pma_can_sleep - checks if the PMA have sleep support
* @phydev: target phy_device struct
......@@ -80,7 +99,10 @@ int genphy_c45_pma_setup_forced(struct phy_device *phydev)
switch (phydev->speed) {
case SPEED_10:
ctrl2 |= MDIO_PMA_CTRL2_10BT;
if (genphy_c45_baset1_able(phydev))
ctrl2 |= MDIO_PMA_CTRL2_BASET1;
else
ctrl2 |= MDIO_PMA_CTRL2_10BT;
break;
case SPEED_100:
ctrl1 |= MDIO_PMA_CTRL1_SPEED100;
......@@ -118,10 +140,95 @@ int genphy_c45_pma_setup_forced(struct phy_device *phydev)
if (ret < 0)
return ret;
if (genphy_c45_baset1_able(phydev)) {
int ctl = 0;
switch (phydev->master_slave_set) {
case MASTER_SLAVE_CFG_MASTER_PREFERRED:
case MASTER_SLAVE_CFG_MASTER_FORCE:
ctl = MDIO_PMA_PMD_BT1_CTRL_CFG_MST;
break;
case MASTER_SLAVE_CFG_SLAVE_FORCE:
case MASTER_SLAVE_CFG_SLAVE_PREFERRED:
case MASTER_SLAVE_CFG_UNKNOWN:
case MASTER_SLAVE_CFG_UNSUPPORTED:
break;
default:
phydev_warn(phydev, "Unsupported Master/Slave mode\n");
return -EOPNOTSUPP;
}
ret = phy_modify_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_PMA_PMD_BT1_CTRL,
MDIO_PMA_PMD_BT1_CTRL_CFG_MST, ctl);
if (ret < 0)
return ret;
}
return genphy_c45_an_disable_aneg(phydev);
}
EXPORT_SYMBOL_GPL(genphy_c45_pma_setup_forced);
/* Sets master/slave preference and supported technologies.
* The preference is set in the BIT(4) of BASE-T1 AN
* advertisement register 7.515 and whether the status
* is forced or not, it is set in the BIT(12) of BASE-T1
* AN advertisement register 7.514.
* Sets 10BASE-T1L Ability BIT(14) in BASE-T1 autonegotiation
* advertisement register [31:16] if supported.
*/
static int genphy_c45_baset1_an_config_aneg(struct phy_device *phydev)
{
int changed = 0;
u16 adv_l = 0;
u16 adv_m = 0;
int ret;
switch (phydev->master_slave_set) {
case MASTER_SLAVE_CFG_MASTER_FORCE:
case MASTER_SLAVE_CFG_SLAVE_FORCE:
adv_l |= MDIO_AN_T1_ADV_L_FORCE_MS;
break;
case MASTER_SLAVE_CFG_MASTER_PREFERRED:
case MASTER_SLAVE_CFG_SLAVE_PREFERRED:
break;
default:
break;
}
switch (phydev->master_slave_set) {
case MASTER_SLAVE_CFG_MASTER_FORCE:
case MASTER_SLAVE_CFG_MASTER_PREFERRED:
adv_m |= MDIO_AN_T1_ADV_M_MST;
break;
case MASTER_SLAVE_CFG_SLAVE_FORCE:
case MASTER_SLAVE_CFG_SLAVE_PREFERRED:
break;
default:
break;
}
adv_l |= linkmode_adv_to_mii_t1_adv_l_t(phydev->advertising);
ret = phy_modify_mmd_changed(phydev, MDIO_MMD_AN, MDIO_AN_T1_ADV_L,
(MDIO_AN_T1_ADV_L_FORCE_MS | MDIO_AN_T1_ADV_L_PAUSE_CAP
| MDIO_AN_T1_ADV_L_PAUSE_ASYM), adv_l);
if (ret < 0)
return ret;
if (ret > 0)
changed = 1;
adv_m |= linkmode_adv_to_mii_t1_adv_m_t(phydev->advertising);
ret = phy_modify_mmd_changed(phydev, MDIO_MMD_AN, MDIO_AN_T1_ADV_M,
MDIO_AN_T1_ADV_M_MST | MDIO_AN_T1_ADV_M_B10L, adv_m);
if (ret < 0)
return ret;
if (ret > 0)
changed = 1;
return changed;
}
/**
* genphy_c45_an_config_aneg - configure advertisement registers
* @phydev: target phy_device struct
......@@ -141,6 +248,9 @@ int genphy_c45_an_config_aneg(struct phy_device *phydev)
changed = genphy_config_eee_advert(phydev);
if (genphy_c45_baset1_able(phydev))
return genphy_c45_baset1_an_config_aneg(phydev);
adv = linkmode_adv_to_mii_adv_t(phydev->advertising);
ret = phy_modify_mmd_changed(phydev, MDIO_MMD_AN, MDIO_AN_ADVERTISE,
......@@ -178,8 +288,12 @@ EXPORT_SYMBOL_GPL(genphy_c45_an_config_aneg);
*/
int genphy_c45_an_disable_aneg(struct phy_device *phydev)
{
u16 reg = MDIO_CTRL1;
return phy_clear_bits_mmd(phydev, MDIO_MMD_AN, MDIO_CTRL1,
if (genphy_c45_baset1_able(phydev))
reg = MDIO_AN_T1_CTRL;
return phy_clear_bits_mmd(phydev, MDIO_MMD_AN, reg,
MDIO_AN_CTRL1_ENABLE | MDIO_AN_CTRL1_RESTART);
}
EXPORT_SYMBOL_GPL(genphy_c45_an_disable_aneg);
......@@ -194,7 +308,12 @@ EXPORT_SYMBOL_GPL(genphy_c45_an_disable_aneg);
*/
int genphy_c45_restart_aneg(struct phy_device *phydev)
{
return phy_set_bits_mmd(phydev, MDIO_MMD_AN, MDIO_CTRL1,
u16 reg = MDIO_CTRL1;
if (genphy_c45_baset1_able(phydev))
reg = MDIO_AN_T1_CTRL;
return phy_set_bits_mmd(phydev, MDIO_MMD_AN, reg,
MDIO_AN_CTRL1_ENABLE | MDIO_AN_CTRL1_RESTART);
}
EXPORT_SYMBOL_GPL(genphy_c45_restart_aneg);
......@@ -210,11 +329,15 @@ EXPORT_SYMBOL_GPL(genphy_c45_restart_aneg);
*/
int genphy_c45_check_and_restart_aneg(struct phy_device *phydev, bool restart)
{
u16 reg = MDIO_CTRL1;
int ret;
if (genphy_c45_baset1_able(phydev))
reg = MDIO_AN_T1_CTRL;
if (!restart) {
/* Configure and restart aneg if it wasn't set before */
ret = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_CTRL1);
ret = phy_read_mmd(phydev, MDIO_MMD_AN, reg);
if (ret < 0)
return ret;
......@@ -242,7 +365,13 @@ EXPORT_SYMBOL_GPL(genphy_c45_check_and_restart_aneg);
*/
int genphy_c45_aneg_done(struct phy_device *phydev)
{
int val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_STAT1);
int reg = MDIO_STAT1;
int val;
if (genphy_c45_baset1_able(phydev))
reg = MDIO_AN_T1_STAT;
val = phy_read_mmd(phydev, MDIO_MMD_AN, reg);
return val < 0 ? val : val & MDIO_AN_STAT1_COMPLETE ? 1 : 0;
}
......@@ -307,6 +436,49 @@ int genphy_c45_read_link(struct phy_device *phydev)
}
EXPORT_SYMBOL_GPL(genphy_c45_read_link);
/* Read the Clause 45 defined BASE-T1 AN (7.513) status register to check
* if autoneg is complete. If so read the BASE-T1 Autonegotiation
* Advertisement registers filling in the link partner advertisement,
* pause and asym_pause members in phydev.
*/
static int genphy_c45_baset1_read_lpa(struct phy_device *phydev)
{
int val;
val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_T1_STAT);
if (val < 0)
return val;
if (!(val & MDIO_AN_STAT1_COMPLETE)) {
linkmode_clear_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, phydev->lp_advertising);
mii_t1_adv_l_mod_linkmode_t(phydev->lp_advertising, 0);
mii_t1_adv_m_mod_linkmode_t(phydev->lp_advertising, 0);
phydev->pause = 0;
phydev->asym_pause = 0;
return 0;
}
linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT, phydev->lp_advertising, 1);
val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_T1_LP_L);
if (val < 0)
return val;
mii_t1_adv_l_mod_linkmode_t(phydev->lp_advertising, val);
phydev->pause = val & MDIO_AN_T1_ADV_L_PAUSE_CAP ? 1 : 0;
phydev->asym_pause = val & MDIO_AN_T1_ADV_L_PAUSE_ASYM ? 1 : 0;
val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_T1_LP_M);
if (val < 0)
return val;
mii_t1_adv_m_mod_linkmode_t(phydev->lp_advertising, val);
return 0;
}
/**
* genphy_c45_read_lpa - read the link partner advertisement and pause
* @phydev: target phy_device struct
......@@ -321,6 +493,9 @@ int genphy_c45_read_lpa(struct phy_device *phydev)
{
int val;
if (genphy_c45_baset1_able(phydev))
return genphy_c45_baset1_read_lpa(phydev);
val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_STAT1);
if (val < 0)
return val;
......@@ -399,6 +574,17 @@ int genphy_c45_read_pma(struct phy_device *phydev)
phydev->duplex = DUPLEX_FULL;
if (genphy_c45_baset1_able(phydev)) {
val = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_PMA_PMD_BT1_CTRL);
if (val < 0)
return val;
if (MDIO_PMA_PMD_BT1_CTRL_CFG_MST)
phydev->master_slave_state = MASTER_SLAVE_STATE_MASTER;
else
phydev->master_slave_state = MASTER_SLAVE_STATE_SLAVE;
}
return 0;
}
EXPORT_SYMBOL_GPL(genphy_c45_read_pma);
......@@ -530,12 +716,67 @@ int genphy_c45_pma_read_abilities(struct phy_device *phydev)
phydev->supported,
val & MDIO_PMA_NG_EXTABLE_5GBT);
}
if (val & MDIO_PMA_EXTABLE_BT1) {
val = phy_read_mmd(phydev, MDIO_MMD_PMAPMD, MDIO_PMA_PMD_BT1);
if (val < 0)
return val;
linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT1L_Full_BIT,
phydev->supported,
val & MDIO_PMA_PMD_BT1_B10L_ABLE);
val = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_T1_STAT);
if (val < 0)
return val;
linkmode_mod_bit(ETHTOOL_LINK_MODE_Autoneg_BIT,
phydev->supported,
val & MDIO_AN_STAT1_ABLE);
}
}
return 0;
}
EXPORT_SYMBOL_GPL(genphy_c45_pma_read_abilities);
/* Read master/slave preference from registers.
* The preference is read from the BIT(4) of BASE-T1 AN
* advertisement register 7.515 and whether the preference
* is forced or not, it is read from BASE-T1 AN advertisement
* register 7.514.
*/
static int genphy_c45_baset1_read_status(struct phy_device *phydev)
{
int ret;
int cfg;
phydev->master_slave_get = MASTER_SLAVE_CFG_UNKNOWN;
phydev->master_slave_state = MASTER_SLAVE_STATE_UNKNOWN;
ret = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_T1_ADV_L);
if (ret < 0)
return ret;
cfg = phy_read_mmd(phydev, MDIO_MMD_AN, MDIO_AN_T1_ADV_M);
if (cfg < 0)
return cfg;
if (ret & MDIO_AN_T1_ADV_L_FORCE_MS) {
if (cfg & MDIO_AN_T1_ADV_M_MST)
phydev->master_slave_get = MASTER_SLAVE_CFG_MASTER_FORCE;
else
phydev->master_slave_get = MASTER_SLAVE_CFG_SLAVE_FORCE;
} else {
if (cfg & MDIO_AN_T1_ADV_M_MST)
phydev->master_slave_get = MASTER_SLAVE_CFG_MASTER_PREFERRED;
else
phydev->master_slave_get = MASTER_SLAVE_CFG_SLAVE_PREFERRED;
}
return 0;
}
/**
* genphy_c45_read_status - read PHY status
* @phydev: target phy_device struct
......@@ -560,6 +801,12 @@ int genphy_c45_read_status(struct phy_device *phydev)
if (ret)
return ret;
if (genphy_c45_baset1_able(phydev)) {
ret = genphy_c45_baset1_read_status(phydev);
if (ret < 0)
return ret;
}
phy_resolve_aneg_linkmode(phydev);
} else {
ret = genphy_c45_read_pma(phydev);
......
......@@ -600,6 +600,7 @@ struct phy_device *phy_device_create(struct mii_bus *bus, int addr, u32 phy_id,
dev->autoneg = AUTONEG_ENABLE;
dev->pma_extable = -ENODATA;
dev->is_c45 = is_c45;
dev->phy_id = phy_id;
if (c45_ids)
......
......@@ -340,6 +340,76 @@ static inline void mii_10gbt_stat_mod_linkmode_lpa_t(unsigned long *advertising,
advertising, lpa & MDIO_AN_10GBT_STAT_LP10G);
}
/**
* mii_t1_adv_l_mod_linkmode_t
* @advertising: target the linkmode advertisement settings
* @lpa: value of the BASE-T1 Autonegotiation Advertisement [15:0] Register
*
* A small helper function that translates BASE-T1 Autonegotiation
* Advertisement [15:0] Register bits to linkmode advertisement settings.
* Other bits in advertising aren't changed.
*/
static inline void mii_t1_adv_l_mod_linkmode_t(unsigned long *advertising, u32 lpa)
{
linkmode_mod_bit(ETHTOOL_LINK_MODE_Pause_BIT, advertising,
lpa & MDIO_AN_T1_ADV_L_PAUSE_CAP);
linkmode_mod_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, advertising,
lpa & MDIO_AN_T1_ADV_L_PAUSE_ASYM);
}
/**
* mii_t1_adv_m_mod_linkmode_t
* @advertising: target the linkmode advertisement settings
* @lpa: value of the BASE-T1 Autonegotiation Advertisement [31:16] Register
*
* A small helper function that translates BASE-T1 Autonegotiation
* Advertisement [31:16] Register bits to linkmode advertisement settings.
* Other bits in advertising aren't changed.
*/
static inline void mii_t1_adv_m_mod_linkmode_t(unsigned long *advertising, u32 lpa)
{
linkmode_mod_bit(ETHTOOL_LINK_MODE_10baseT1L_Full_BIT,
advertising, lpa & MDIO_AN_T1_ADV_M_B10L);
}
/**
* linkmode_adv_to_mii_t1_adv_l_t
* @advertising: the linkmode advertisement settings
*
* A small helper function that translates linkmode advertisement
* settings to phy autonegotiation advertisements for the
* BASE-T1 Autonegotiation Advertisement [15:0] Register.
*/
static inline u32 linkmode_adv_to_mii_t1_adv_l_t(unsigned long *advertising)
{
u32 result = 0;
if (linkmode_test_bit(ETHTOOL_LINK_MODE_Pause_BIT, advertising))
result |= MDIO_AN_T1_ADV_L_PAUSE_CAP;
if (linkmode_test_bit(ETHTOOL_LINK_MODE_Asym_Pause_BIT, advertising))
result |= MDIO_AN_T1_ADV_L_PAUSE_ASYM;
return result;
}
/**
* linkmode_adv_to_mii_t1_adv_m_t
* @advertising: the linkmode advertisement settings
*
* A small helper function that translates linkmode advertisement
* settings to phy autonegotiation advertisements for the
* BASE-T1 Autonegotiation Advertisement [31:16] Register.
*/
static inline u32 linkmode_adv_to_mii_t1_adv_m_t(unsigned long *advertising)
{
u32 result = 0;
if (linkmode_test_bit(ETHTOOL_LINK_MODE_10baseT1L_Full_BIT, advertising))
result |= MDIO_AN_T1_ADV_M_B10L;
return result;
}
int __mdiobus_read(struct mii_bus *bus, int addr, u32 regnum);
int __mdiobus_write(struct mii_bus *bus, int addr, u32 regnum, u16 val);
int __mdiobus_modify_changed(struct mii_bus *bus, int addr, u32 regnum,
......
......@@ -570,6 +570,7 @@ struct macsec_ops;
* @autoneg_complete: Flag auto negotiation of the link has completed
* @mdix: Current crossover
* @mdix_ctrl: User setting of crossover
* @pma_extable: Cached value of PMA/PMD Extended Abilities Register
* @interrupts: Flag interrupts have been enabled
* @interface: enum phy_interface_t value
* @skb: Netlink message for cable diagnostics
......@@ -698,6 +699,8 @@ struct phy_device {
u8 mdix;
u8 mdix_ctrl;
int pma_extable;
void (*phy_link_change)(struct phy_device *phydev, bool up);
void (*adjust_link)(struct net_device *dev);
......
......@@ -70,6 +70,7 @@
#define MDIO_B10L_PMA_CTRL 2294 /* 10BASE-T1L PMA control */
#define MDIO_PMA_10T1L_STAT 2295 /* 10BASE-T1L PMA status */
#define MDIO_PCS_10T1L_CTRL 2278 /* 10BASE-T1L PCS control */
#define MDIO_PMA_PMD_BT1 18 /* BASE-T1 PMA/PMD extended ability */
#define MDIO_AN_T1_CTRL 512 /* BASE-T1 AN control */
#define MDIO_AN_T1_STAT 513 /* BASE-T1 AN status */
#define MDIO_AN_T1_ADV_L 514 /* BASE-T1 AN advertisement register [15:0] */
......@@ -78,6 +79,7 @@
#define MDIO_AN_T1_LP_L 517 /* BASE-T1 AN LP Base Page ability register [15:0] */
#define MDIO_AN_T1_LP_M 518 /* BASE-T1 AN LP Base Page ability register [31:16] */
#define MDIO_AN_T1_LP_H 519 /* BASE-T1 AN LP Base Page ability register [47:32] */
#define MDIO_PMA_PMD_BT1_CTRL 2100 /* BASE-T1 PMA/PMD control register */
/* LASI (Link Alarm Status Interrupt) registers, defined by XENPAK MSA. */
#define MDIO_PMA_LASI_RXCTRL 0x9000 /* RX_ALARM control */
......@@ -170,6 +172,7 @@
#define MDIO_PMA_CTRL2_10BT 0x000f /* 10BASE-T type */
#define MDIO_PMA_CTRL2_2_5GBT 0x0030 /* 2.5GBaseT type */
#define MDIO_PMA_CTRL2_5GBT 0x0031 /* 5GBaseT type */
#define MDIO_PMA_CTRL2_BASET1 0x003D /* BASE-T1 type */
#define MDIO_PCS_CTRL2_TYPE 0x0003 /* PCS type selection */
#define MDIO_PCS_CTRL2_10GBR 0x0000 /* 10GBASE-R type */
#define MDIO_PCS_CTRL2_10GBX 0x0001 /* 10GBASE-X type */
......@@ -223,6 +226,7 @@
#define MDIO_PMA_EXTABLE_1000BKX 0x0040 /* 1000BASE-KX ability */
#define MDIO_PMA_EXTABLE_100BTX 0x0080 /* 100BASE-TX ability */
#define MDIO_PMA_EXTABLE_10BT 0x0100 /* 10BASE-T ability */
#define MDIO_PMA_EXTABLE_BT1 0x0800 /* BASE-T1 ability */
#define MDIO_PMA_EXTABLE_NBT 0x4000 /* 2.5/5GBASE-T ability */
/* PHY XGXS lane state register. */
......@@ -301,6 +305,9 @@
#define MDIO_PCS_10T1L_CTRL_LB 0x4000 /* Enable PCS level loopback mode */
#define MDIO_PCS_10T1L_CTRL_RESET 0x8000 /* PCS reset */
/* BASE-T1 PMA/PMD extended ability register. */
#define MDIO_PMA_PMD_BT1_B10L_ABLE 0x0004 /* 10BASE-T1L Ability */
/* BASE-T1 auto-negotiation advertisement register [15:0] */
#define MDIO_AN_T1_ADV_L_PAUSE_CAP ADVERTISE_PAUSE_CAP
#define MDIO_AN_T1_ADV_L_PAUSE_ASYM ADVERTISE_PAUSE_ASYM
......@@ -333,6 +340,9 @@
#define MDIO_AN_T1_LP_H_10L_TX_HI_REQ 0x1000 /* 10BASE-T1L High Level LP Transmit Request */
#define MDIO_AN_T1_LP_H_10L_TX_HI 0x2000 /* 10BASE-T1L High Level LP Transmit Ability */
/* BASE-T1 PMA/PMD control register */
#define MDIO_PMA_PMD_BT1_CTRL_CFG_MST 0x4000 /* MASTER-SLAVE config value */
/* EEE Supported/Advertisement/LP Advertisement registers.
*
* EEE capability Register (3.20), Advertisement (7.60) and
......
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