From 6cfb3bcc0641109951a124019cd2e0623107d18d Mon Sep 17 00:00:00 2001 From: Charles-Antoine Couret Date: Tue, 19 Jul 2016 11:13:10 +0200 Subject: [PATCH 1/4] Marvell phy: check link status in case of fiber link. For concerned phy, the fiber link is checked before the copper link. According to datasheet, the link which is up is enabled. If both links are down, copper link would be used. To detect fiber link status, we used the real time status because of troubles with the copper method. Tested with Marvell 88E1512. Reviewed-by: Andrew Lunn Signed-off-by: Charles-Antoine Couret Signed-off-by: David S. Miller --- drivers/net/phy/marvell.c | 153 +++++++++++++++++++++++++++++++++++--- 1 file changed, 141 insertions(+), 12 deletions(-) diff --git a/drivers/net/phy/marvell.c b/drivers/net/phy/marvell.c index ec2c1eee6405..75b921169d3e 100644 --- a/drivers/net/phy/marvell.c +++ b/drivers/net/phy/marvell.c @@ -138,6 +138,20 @@ #define MII_88E1510_GEN_CTRL_REG_1_MODE_SGMII 0x1 /* SGMII to copper */ #define MII_88E1510_GEN_CTRL_REG_1_RESET 0x8000 /* Soft reset */ +#define LPA_FIBER_1000HALF 0x40 +#define LPA_FIBER_1000FULL 0x20 + +#define LPA_PAUSE_FIBER 0x180 +#define LPA_PAUSE_ASYM_FIBER 0x100 + +#define ADVERTISE_FIBER_1000HALF 0x40 +#define ADVERTISE_FIBER_1000FULL 0x20 + +#define ADVERTISE_PAUSE_FIBER 0x180 +#define ADVERTISE_PAUSE_ASYM_FIBER 0x100 + +#define REGISTER_LINK_STATUS 0x400 + MODULE_DESCRIPTION("Marvell PHY driver"); MODULE_AUTHOR("Andy Fleming"); MODULE_LICENSE("GPL"); @@ -890,26 +904,79 @@ static int m88e1145_config_init(struct phy_device *phydev) return 0; } -/* marvell_read_status +/** + * fiber_lpa_to_ethtool_lpa_t + * @lpa: value of the MII_LPA register for fiber link + * + * A small helper function that translates MII_LPA + * bits to ethtool LP advertisement settings. + */ +static u32 fiber_lpa_to_ethtool_lpa_t(u32 lpa) +{ + u32 result = 0; + + if (lpa & LPA_FIBER_1000HALF) + result |= ADVERTISED_1000baseT_Half; + if (lpa & LPA_FIBER_1000FULL) + result |= ADVERTISED_1000baseT_Full; + + return result; +} + +/** + * marvell_update_link - update link status in real time in @phydev + * @phydev: target phy_device struct + * + * Description: Update the value in phydev->link to reflect the + * current link value. + */ +static int marvell_update_link(struct phy_device *phydev, int fiber) +{ + int status; + + /* Use the generic register for copper link, or specific + * register for fiber case */ + if (fiber) { + status = phy_read(phydev, MII_M1011_PHY_STATUS); + if (status < 0) + return status; + + if ((status & REGISTER_LINK_STATUS) == 0) + phydev->link = 0; + else + phydev->link = 1; + } else { + return genphy_update_link(phydev); + } + + return 0; +} + +/* marvell_read_status_page * - * Generic status code does not detect Fiber correctly! * Description: * Check the link, then figure out the current state * by comparing what we advertise with what the link partner * advertises. Start by checking the gigabit possibilities, * then move on to 10/100. */ -static int marvell_read_status(struct phy_device *phydev) +static int marvell_read_status_page(struct phy_device *phydev, int page) { int adv; int err; int lpa; int lpagb; int status = 0; + int fiber; - /* Update the link, but return if there + /* Detect and update the link, but return if there * was an error */ - err = genphy_update_link(phydev); + if (page == MII_M1111_FIBER) + fiber = 1; + else + fiber = 0; + + err = marvell_update_link(phydev, fiber); if (err) return err; @@ -930,9 +997,6 @@ static int marvell_read_status(struct phy_device *phydev) if (adv < 0) return adv; - phydev->lp_advertising = mii_stat1000_to_ethtool_lpa_t(lpagb) | - mii_lpa_to_ethtool_lpa_t(lpa); - lpa &= adv; if (status & MII_M1011_PHY_STATUS_FULLDUPLEX) @@ -957,9 +1021,30 @@ static int marvell_read_status(struct phy_device *phydev) break; } - if (phydev->duplex == DUPLEX_FULL) { - phydev->pause = lpa & LPA_PAUSE_CAP ? 1 : 0; - phydev->asym_pause = lpa & LPA_PAUSE_ASYM ? 1 : 0; + if (!fiber) { + phydev->lp_advertising = mii_stat1000_to_ethtool_lpa_t(lpagb) | + mii_lpa_to_ethtool_lpa_t(lpa); + + if (phydev->duplex == DUPLEX_FULL) { + phydev->pause = lpa & LPA_PAUSE_CAP ? 1 : 0; + phydev->asym_pause = lpa & LPA_PAUSE_ASYM ? 1 : 0; + } + } else { + /* The fiber link is only 1000M capable */ + phydev->lp_advertising = fiber_lpa_to_ethtool_lpa_t(lpa); + + if (phydev->duplex == DUPLEX_FULL) { + if (!(lpa & LPA_PAUSE_FIBER)) { + phydev->pause = 0; + phydev->asym_pause = 0; + } else if ((lpa & LPA_PAUSE_ASYM_FIBER)) { + phydev->pause = 1; + phydev->asym_pause = 1; + } else { + phydev->pause = 1; + phydev->asym_pause = 0; + } + } } } else { int bmcr = phy_read(phydev, MII_BMCR); @@ -986,6 +1071,50 @@ static int marvell_read_status(struct phy_device *phydev) return 0; } +/* marvell_read_status + * + * Some Marvell's phys have two modes: fiber and copper. + * Both need status checked. + * Description: + * First, check the fiber link and status. + * If the fiber link is down, check the copper link and status which + * will be the default value if both link are down. + */ +static int marvell_read_status(struct phy_device *phydev) +{ + int err; + + /* Check the fiber mode first */ + if (phydev->supported & SUPPORTED_FIBRE) { + err = phy_write(phydev, MII_MARVELL_PHY_PAGE, MII_M1111_FIBER); + if (err < 0) + goto error; + + err = marvell_read_status_page(phydev, MII_M1111_FIBER); + if (err < 0) + goto error; + + /* If the fiber link is up, it is the selected and used link. + * In this case, we need to stay in the fiber page. + * Please to be careful about that, avoid to restore Copper page + * in other functions which could break the behaviour + * for some fiber phy like 88E1512. + * */ + if (phydev->link) + return 0; + + /* If fiber link is down, check and save copper mode state */ + err = phy_write(phydev, MII_MARVELL_PHY_PAGE, MII_M1111_COPPER); + if (err < 0) + goto error; + } + + return marvell_read_status_page(phydev, MII_M1111_COPPER); + +error: + phy_write(phydev, MII_MARVELL_PHY_PAGE, MII_M1111_COPPER); + return err; +} static int marvell_aneg_done(struct phy_device *phydev) { int retval = phy_read(phydev, MII_M1011_PHY_STATUS); @@ -1361,7 +1490,7 @@ static struct phy_driver marvell_drivers[] = { .phy_id = MARVELL_PHY_ID_88E1510, .phy_id_mask = MARVELL_PHY_ID_MASK, .name = "Marvell 88E1510", - .features = PHY_GBIT_FEATURES, + .features = PHY_GBIT_FEATURES | SUPPORTED_FIBRE, .flags = PHY_HAS_INTERRUPT, .probe = marvell_probe, .config_init = &m88e1510_config_init, From 2170fef78a400ca3c891da5db73db5e70388aba7 Mon Sep 17 00:00:00 2001 From: Charles-Antoine Couret Date: Tue, 19 Jul 2016 11:13:11 +0200 Subject: [PATCH 2/4] Marvell phy: add field to get errors from fiber link. Add support for the fiber receiver error counter in the statistics. Rename the current counter which is for copper errors to phy_receive_errors_copper, so it is easy to distinguish copper from fiber. Reviewed-by: Andrew Lunn Signed-off-by: Charles-Antoine Couret Signed-off-by: David S. Miller --- drivers/net/phy/marvell.c | 9 +++++++-- 1 file changed, 7 insertions(+), 2 deletions(-) diff --git a/drivers/net/phy/marvell.c b/drivers/net/phy/marvell.c index 75b921169d3e..0dde7ca1ae41 100644 --- a/drivers/net/phy/marvell.c +++ b/drivers/net/phy/marvell.c @@ -151,6 +151,7 @@ #define ADVERTISE_PAUSE_ASYM_FIBER 0x100 #define REGISTER_LINK_STATUS 0x400 +#define NB_FIBER_STATS 1 MODULE_DESCRIPTION("Marvell PHY driver"); MODULE_AUTHOR("Andy Fleming"); @@ -164,8 +165,9 @@ struct marvell_hw_stat { }; static struct marvell_hw_stat marvell_hw_stats[] = { - { "phy_receive_errors", 0, 21, 16}, + { "phy_receive_errors_copper", 0, 21, 16}, { "phy_idle_errors", 0, 10, 8 }, + { "phy_receive_errors_fiber", 1, 21, 16}, }; struct marvell_priv { @@ -1236,7 +1238,10 @@ static int m88e1318_set_wol(struct phy_device *phydev, struct ethtool_wolinfo *w static int marvell_get_sset_count(struct phy_device *phydev) { - return ARRAY_SIZE(marvell_hw_stats); + if (phydev->supported & SUPPORTED_FIBRE) + return ARRAY_SIZE(marvell_hw_stats); + else + return ARRAY_SIZE(marvell_hw_stats) - NB_FIBER_STATS; } static void marvell_get_strings(struct phy_device *phydev, u8 *data) From 78301ebe9b5a2645d05aa7f791d068b727e7500f Mon Sep 17 00:00:00 2001 From: Charles-Antoine Couret Date: Tue, 19 Jul 2016 11:13:12 +0200 Subject: [PATCH 3/4] Marvell phy: add configuration of autonegociation for fiber link. To be correctly initilized, the fiber interface needs to be configured via autonegociation registers which use some customs options or registers. Reviewed-by: Andrew Lunn Signed-off-by: Charles-Antoine Couret Signed-off-by: David S. Miller --- drivers/net/phy/marvell.c | 111 +++++++++++++++++++++++++++++++++++++- 1 file changed, 109 insertions(+), 2 deletions(-) diff --git a/drivers/net/phy/marvell.c b/drivers/net/phy/marvell.c index 0dde7ca1ae41..fb4d4028f674 100644 --- a/drivers/net/phy/marvell.c +++ b/drivers/net/phy/marvell.c @@ -493,15 +493,122 @@ static int m88e1318_config_aneg(struct phy_device *phydev) return m88e1121_config_aneg(phydev); } +/** + * ethtool_adv_to_fiber_adv_t + * @ethadv: the ethtool advertisement settings + * + * A small helper function that translates ethtool advertisement + * settings to phy autonegotiation advertisements for the + * MII_ADV register for fiber link. + */ +static inline u32 ethtool_adv_to_fiber_adv_t(u32 ethadv) +{ + u32 result = 0; + + if (ethadv & ADVERTISED_1000baseT_Half) + result |= ADVERTISE_FIBER_1000HALF; + if (ethadv & ADVERTISED_1000baseT_Full) + result |= ADVERTISE_FIBER_1000FULL; + + if ((ethadv & ADVERTISE_PAUSE_ASYM) && (ethadv & ADVERTISE_PAUSE_CAP)) + result |= LPA_PAUSE_ASYM_FIBER; + else if (ethadv & ADVERTISE_PAUSE_CAP) + result |= (ADVERTISE_PAUSE_FIBER + & (~ADVERTISE_PAUSE_ASYM_FIBER)); + + return result; +} + +/** + * marvell_config_aneg_fiber - restart auto-negotiation or write BMCR + * @phydev: target phy_device struct + * + * Description: If auto-negotiation is enabled, we configure the + * advertising, and then restart auto-negotiation. If it is not + * enabled, then we write the BMCR. Adapted for fiber link in + * some Marvell's devices. + */ +static int marvell_config_aneg_fiber(struct phy_device *phydev) +{ + int changed = 0; + int err; + int adv, oldadv; + u32 advertise; + + if (phydev->autoneg != AUTONEG_ENABLE) + return genphy_setup_forced(phydev); + + /* Only allow advertising what this PHY supports */ + phydev->advertising &= phydev->supported; + advertise = phydev->advertising; + + /* Setup fiber advertisement */ + adv = phy_read(phydev, MII_ADVERTISE); + if (adv < 0) + return adv; + + oldadv = adv; + adv &= ~(ADVERTISE_FIBER_1000HALF | ADVERTISE_FIBER_1000FULL + | LPA_PAUSE_FIBER); + adv |= ethtool_adv_to_fiber_adv_t(advertise); + + if (adv != oldadv) { + err = phy_write(phydev, MII_ADVERTISE, adv); + if (err < 0) + return err; + + changed = 1; + } + + if (changed == 0) { + /* Advertisement hasn't changed, but maybe aneg was never on to + * begin with? Or maybe phy was isolated? + */ + int ctl = phy_read(phydev, MII_BMCR); + + if (ctl < 0) + return ctl; + + if (!(ctl & BMCR_ANENABLE) || (ctl & BMCR_ISOLATE)) + changed = 1; /* do restart aneg */ + } + + /* Only restart aneg if we are advertising something different + * than we were before. + */ + if (changed > 0) + changed = genphy_restart_aneg(phydev); + + return changed; +} + static int m88e1510_config_aneg(struct phy_device *phydev) { int err; + err = phy_write(phydev, MII_MARVELL_PHY_PAGE, MII_M1111_COPPER); + if (err < 0) + goto error; + + /* Configure the copper link first */ err = m88e1318_config_aneg(phydev); if (err < 0) - return err; + goto error; - return 0; + /* Then the fiber link */ + err = phy_write(phydev, MII_MARVELL_PHY_PAGE, MII_M1111_FIBER); + if (err < 0) + goto error; + + err = marvell_config_aneg_fiber(phydev); + if (err < 0) + goto error; + + return phy_write(phydev, MII_MARVELL_PHY_PAGE, MII_M1111_COPPER); + +error: + phy_write(phydev, MII_MARVELL_PHY_PAGE, MII_M1111_COPPER); + return err; } static int marvell_config_init(struct phy_device *phydev) From 3758be3dc162b56eaafaa914b98845f914106ef2 Mon Sep 17 00:00:00 2001 From: Charles-Antoine Couret Date: Tue, 19 Jul 2016 11:13:13 +0200 Subject: [PATCH 4/4] Marvell phy: add functions to suspend and resume both interfaces: fiber and copper links. These functions used standards registers in a different page for both interfaces: copper and fiber. Reviewed-by: Andrew Lunn Signed-off-by: Charles-Antoine Couret Signed-off-by: David S. Miller --- drivers/net/phy/marvell.c | 73 +++++++++++++++++++++++++++++++++++++-- 1 file changed, 71 insertions(+), 2 deletions(-) diff --git a/drivers/net/phy/marvell.c b/drivers/net/phy/marvell.c index fb4d4028f674..c2dcf02df202 100644 --- a/drivers/net/phy/marvell.c +++ b/drivers/net/phy/marvell.c @@ -1224,6 +1224,75 @@ static int marvell_read_status(struct phy_device *phydev) phy_write(phydev, MII_MARVELL_PHY_PAGE, MII_M1111_COPPER); return err; } + +/* marvell_suspend + * + * Some Marvell's phys have two modes: fiber and copper. + * Both need to be suspended + */ +static int marvell_suspend(struct phy_device *phydev) +{ + int err; + + /* Suspend the fiber mode first */ + if (!(phydev->supported & SUPPORTED_FIBRE)) { + err = phy_write(phydev, MII_MARVELL_PHY_PAGE, MII_M1111_FIBER); + if (err < 0) + goto error; + + /* With the page set, use the generic suspend */ + err = genphy_suspend(phydev); + if (err < 0) + goto error; + + /* Then, the copper link */ + err = phy_write(phydev, MII_MARVELL_PHY_PAGE, MII_M1111_COPPER); + if (err < 0) + goto error; + } + + /* With the page set, use the generic suspend */ + return genphy_suspend(phydev); + +error: + phy_write(phydev, MII_MARVELL_PHY_PAGE, MII_M1111_COPPER); + return err; +} + +/* marvell_resume + * + * Some Marvell's phys have two modes: fiber and copper. + * Both need to be resumed + */ +static int marvell_resume(struct phy_device *phydev) +{ + int err; + + /* Resume the fiber mode first */ + if (!(phydev->supported & SUPPORTED_FIBRE)) { + err = phy_write(phydev, MII_MARVELL_PHY_PAGE, MII_M1111_FIBER); + if (err < 0) + goto error; + + /* With the page set, use the generic resume */ + err = genphy_resume(phydev); + if (err < 0) + goto error; + + /* Then, the copper link */ + err = phy_write(phydev, MII_MARVELL_PHY_PAGE, MII_M1111_COPPER); + if (err < 0) + goto error; + } + + /* With the page set, use the generic resume */ + return genphy_resume(phydev); + +error: + phy_write(phydev, MII_MARVELL_PHY_PAGE, MII_M1111_COPPER); + return err; +} + static int marvell_aneg_done(struct phy_device *phydev) { int retval = phy_read(phydev, MII_M1011_PHY_STATUS); @@ -1611,8 +1680,8 @@ static struct phy_driver marvell_drivers[] = { .ack_interrupt = &marvell_ack_interrupt, .config_intr = &marvell_config_intr, .did_interrupt = &m88e1121_did_interrupt, - .resume = &genphy_resume, - .suspend = &genphy_suspend, + .resume = &marvell_resume, + .suspend = &marvell_suspend, .get_sset_count = marvell_get_sset_count, .get_strings = marvell_get_strings, .get_stats = marvell_get_stats,