diff options
Diffstat (limited to 'drivers/net/phy')
| -rw-r--r-- | drivers/net/phy/bcm-phy-lib.c | 86 | ||||
| -rw-r--r-- | drivers/net/phy/bcm-phy-lib.h | 5 |
2 files changed, 91 insertions, 0 deletions
diff --git a/drivers/net/phy/bcm-phy-lib.c b/drivers/net/phy/bcm-phy-lib.c index 18e11b3a0f41..d742894816f6 100644 --- a/drivers/net/phy/bcm-phy-lib.c +++ b/drivers/net/phy/bcm-phy-lib.c @@ -225,6 +225,92 @@ int bcm_phy_enable_eee(struct phy_device *phydev) } EXPORT_SYMBOL_GPL(bcm_phy_enable_eee); +int bcm_phy_downshift_get(struct phy_device *phydev, u8 *count) +{ + int val; + + val = bcm54xx_auxctl_read(phydev, MII_BCM54XX_AUXCTL_SHDWSEL_MISC); + if (val < 0) + return val; + + /* Check if wirespeed is enabled or not */ + if (!(val & MII_BCM54XX_AUXCTL_SHDWSEL_MISC_WIRESPEED_EN)) { + *count = DOWNSHIFT_DEV_DISABLE; + return 0; + } + + val = bcm_phy_read_shadow(phydev, BCM54XX_SHD_SCR2); + if (val < 0) + return val; + + /* Downgrade after one link attempt */ + if (val & BCM54XX_SHD_SCR2_WSPD_RTRY_DIS) { + *count = 1; + } else { + /* Downgrade after configured retry count */ + val >>= BCM54XX_SHD_SCR2_WSPD_RTRY_LMT_SHIFT; + val &= BCM54XX_SHD_SCR2_WSPD_RTRY_LMT_MASK; + *count = val + BCM54XX_SHD_SCR2_WSPD_RTRY_LMT_OFFSET; + } + + return 0; +} +EXPORT_SYMBOL_GPL(bcm_phy_downshift_get); + +int bcm_phy_downshift_set(struct phy_device *phydev, u8 count) +{ + int val = 0, ret = 0; + + /* Range check the number given */ + if (count - BCM54XX_SHD_SCR2_WSPD_RTRY_LMT_OFFSET > + BCM54XX_SHD_SCR2_WSPD_RTRY_LMT_MASK && + count != DOWNSHIFT_DEV_DEFAULT_COUNT) { + return -ERANGE; + } + + val = bcm54xx_auxctl_read(phydev, MII_BCM54XX_AUXCTL_SHDWSEL_MISC); + if (val < 0) + return val; + + /* Se the write enable bit */ + val |= MII_BCM54XX_AUXCTL_MISC_WREN; + + if (count == DOWNSHIFT_DEV_DISABLE) { + val &= ~MII_BCM54XX_AUXCTL_SHDWSEL_MISC_WIRESPEED_EN; + return bcm54xx_auxctl_write(phydev, + MII_BCM54XX_AUXCTL_SHDWSEL_MISC, + val); + } else { + val |= MII_BCM54XX_AUXCTL_SHDWSEL_MISC_WIRESPEED_EN; + ret = bcm54xx_auxctl_write(phydev, + MII_BCM54XX_AUXCTL_SHDWSEL_MISC, + val); + if (ret < 0) + return ret; + } + + val = bcm_phy_read_shadow(phydev, BCM54XX_SHD_SCR2); + val &= ~(BCM54XX_SHD_SCR2_WSPD_RTRY_LMT_MASK << + BCM54XX_SHD_SCR2_WSPD_RTRY_LMT_SHIFT | + BCM54XX_SHD_SCR2_WSPD_RTRY_DIS); + + switch (count) { + case 1: + val |= BCM54XX_SHD_SCR2_WSPD_RTRY_DIS; + break; + case DOWNSHIFT_DEV_DEFAULT_COUNT: + val |= 1 << BCM54XX_SHD_SCR2_WSPD_RTRY_LMT_SHIFT; + break; + default: + val |= (count - BCM54XX_SHD_SCR2_WSPD_RTRY_LMT_OFFSET) << + BCM54XX_SHD_SCR2_WSPD_RTRY_LMT_SHIFT; + break; + } + + return bcm_phy_write_shadow(phydev, BCM54XX_SHD_SCR2, val); +} +EXPORT_SYMBOL_GPL(bcm_phy_downshift_set); + MODULE_DESCRIPTION("Broadcom PHY Library"); MODULE_LICENSE("GPL v2"); MODULE_AUTHOR("Broadcom Corporation"); diff --git a/drivers/net/phy/bcm-phy-lib.h b/drivers/net/phy/bcm-phy-lib.h index 31cb4fdf5d5a..3f492e629094 100644 --- a/drivers/net/phy/bcm-phy-lib.h +++ b/drivers/net/phy/bcm-phy-lib.h @@ -37,4 +37,9 @@ int bcm_phy_config_intr(struct phy_device *phydev); int bcm_phy_enable_apd(struct phy_device *phydev, bool dll_pwr_down); int bcm_phy_enable_eee(struct phy_device *phydev); + +int bcm_phy_downshift_get(struct phy_device *phydev, u8 *count); + +int bcm_phy_downshift_set(struct phy_device *phydev, u8 count); + #endif /* _LINUX_BCM_PHY_LIB_H */ |