diff options
Diffstat (limited to 'drivers/net/phy/dp83869.c')
| -rw-r--r-- | drivers/net/phy/dp83869.c | 116 |
1 files changed, 116 insertions, 0 deletions
diff --git a/drivers/net/phy/dp83869.c b/drivers/net/phy/dp83869.c index de68e56faf3d..0aee5f645b71 100644 --- a/drivers/net/phy/dp83869.c +++ b/drivers/net/phy/dp83869.c @@ -11,6 +11,7 @@ #include <linux/of.h> #include <linux/phy.h> #include <linux/delay.h> +#include <linux/bitfield.h> #include <dt-bindings/net/ti-dp83869.h> @@ -20,6 +21,7 @@ #define MII_DP83869_PHYCTRL 0x10 #define MII_DP83869_MICR 0x12 #define MII_DP83869_ISR 0x13 +#define DP83869_CFG2 0x14 #define DP83869_CTRL 0x1f #define DP83869_CFG4 0x1e @@ -120,6 +122,18 @@ #define DP83869_WOL_SEC_EN BIT(5) #define DP83869_WOL_ENH_MAC BIT(7) +/* CFG2 bits */ +#define DP83869_DOWNSHIFT_EN (BIT(8) | BIT(9)) +#define DP83869_DOWNSHIFT_ATTEMPT_MASK (BIT(10) | BIT(11)) +#define DP83869_DOWNSHIFT_1_COUNT_VAL 0 +#define DP83869_DOWNSHIFT_2_COUNT_VAL 1 +#define DP83869_DOWNSHIFT_4_COUNT_VAL 2 +#define DP83869_DOWNSHIFT_8_COUNT_VAL 3 +#define DP83869_DOWNSHIFT_1_COUNT 1 +#define DP83869_DOWNSHIFT_2_COUNT 2 +#define DP83869_DOWNSHIFT_4_COUNT 4 +#define DP83869_DOWNSHIFT_8_COUNT 8 + enum { DP83869_PORT_MIRRORING_KEEP, DP83869_PORT_MIRRORING_EN, @@ -350,6 +364,99 @@ static void dp83869_get_wol(struct phy_device *phydev, wol->wolopts = 0; } +static int dp83869_get_downshift(struct phy_device *phydev, u8 *data) +{ + int val, cnt, enable, count; + + val = phy_read(phydev, DP83869_CFG2); + if (val < 0) + return val; + + enable = FIELD_GET(DP83869_DOWNSHIFT_EN, val); + cnt = FIELD_GET(DP83869_DOWNSHIFT_ATTEMPT_MASK, val); + + switch (cnt) { + case DP83869_DOWNSHIFT_1_COUNT_VAL: + count = DP83869_DOWNSHIFT_1_COUNT; + break; + case DP83869_DOWNSHIFT_2_COUNT_VAL: + count = DP83869_DOWNSHIFT_2_COUNT; + break; + case DP83869_DOWNSHIFT_4_COUNT_VAL: + count = DP83869_DOWNSHIFT_4_COUNT; + break; + case DP83869_DOWNSHIFT_8_COUNT_VAL: + count = DP83869_DOWNSHIFT_8_COUNT; + break; + default: + return -EINVAL; + } + + *data = enable ? count : DOWNSHIFT_DEV_DISABLE; + + return 0; +} + +static int dp83869_set_downshift(struct phy_device *phydev, u8 cnt) +{ + int val, count; + + if (cnt > DP83869_DOWNSHIFT_8_COUNT) + return -EINVAL; + + if (!cnt) + return phy_clear_bits(phydev, DP83869_CFG2, + DP83869_DOWNSHIFT_EN); + + switch (cnt) { + case DP83869_DOWNSHIFT_1_COUNT: + count = DP83869_DOWNSHIFT_1_COUNT_VAL; + break; + case DP83869_DOWNSHIFT_2_COUNT: + count = DP83869_DOWNSHIFT_2_COUNT_VAL; + break; + case DP83869_DOWNSHIFT_4_COUNT: + count = DP83869_DOWNSHIFT_4_COUNT_VAL; + break; + case DP83869_DOWNSHIFT_8_COUNT: + count = DP83869_DOWNSHIFT_8_COUNT_VAL; + break; + default: + phydev_err(phydev, + "Downshift count must be 1, 2, 4 or 8\n"); + return -EINVAL; + } + + val = DP83869_DOWNSHIFT_EN; + val |= FIELD_PREP(DP83869_DOWNSHIFT_ATTEMPT_MASK, count); + + return phy_modify(phydev, DP83869_CFG2, + DP83869_DOWNSHIFT_EN | DP83869_DOWNSHIFT_ATTEMPT_MASK, + val); +} + +static int dp83869_get_tunable(struct phy_device *phydev, + struct ethtool_tunable *tuna, void *data) +{ + switch (tuna->id) { + case ETHTOOL_PHY_DOWNSHIFT: + return dp83869_get_downshift(phydev, data); + default: + return -EOPNOTSUPP; + } +} + +static int dp83869_set_tunable(struct phy_device *phydev, + struct ethtool_tunable *tuna, const void *data) +{ + switch (tuna->id) { + case ETHTOOL_PHY_DOWNSHIFT: + return dp83869_set_downshift(phydev, *(const u8 *)data); + default: + return -EOPNOTSUPP; + } +} + static int dp83869_config_port_mirroring(struct phy_device *phydev) { struct dp83869_private *dp83869 = phydev->priv; @@ -642,6 +749,12 @@ static int dp83869_config_init(struct phy_device *phydev) struct dp83869_private *dp83869 = phydev->priv; int ret, val; + /* Force speed optimization for the PHY even if it strapped */ + ret = phy_modify(phydev, DP83869_CFG2, DP83869_DOWNSHIFT_EN, + DP83869_DOWNSHIFT_EN); + if (ret) + return ret; + ret = dp83869_configure_mode(phydev, dp83869); if (ret) return ret; @@ -741,6 +854,9 @@ static struct phy_driver dp83869_driver[] = { .config_intr = dp83869_config_intr, .read_status = dp83869_read_status, + .get_tunable = dp83869_get_tunable, + .set_tunable = dp83869_set_tunable, + .get_wol = dp83869_get_wol, .set_wol = dp83869_set_wol, |