diff options
Diffstat (limited to 'drivers/net/phy')
| -rw-r--r-- | drivers/net/phy/mscc/mscc.h | 28 | ||||
| -rw-r--r-- | drivers/net/phy/mscc/mscc_main.c | 78 |
2 files changed, 49 insertions, 57 deletions
diff --git a/drivers/net/phy/mscc/mscc.h b/drivers/net/phy/mscc/mscc.h index d983d3af66d6..030bf8b600df 100644 --- a/drivers/net/phy/mscc/mscc.h +++ b/drivers/net/phy/mscc/mscc.h @@ -161,25 +161,15 @@ enum rgmii_clock_delay { /* Extended Page 2 Registers */ #define MSCC_PHY_CU_PMD_TX_CNTL 16 -#define MSCC_PHY_RGMII_SETTINGS 18 -#define RGMII_SKEW_RX_POS 1 -#define RGMII_SKEW_TX_POS 4 - -/* RGMII skew values, in ns */ -#define VSC8584_RGMII_SKEW_0_2 0 -#define VSC8584_RGMII_SKEW_0_8 1 -#define VSC8584_RGMII_SKEW_1_1 2 -#define VSC8584_RGMII_SKEW_1_7 3 -#define VSC8584_RGMII_SKEW_2_0 4 -#define VSC8584_RGMII_SKEW_2_3 5 -#define VSC8584_RGMII_SKEW_2_6 6 -#define VSC8584_RGMII_SKEW_3_4 7 - -#define MSCC_PHY_RGMII_CNTL 20 -#define RGMII_RX_CLK_DELAY_MASK 0x0070 -#define RGMII_RX_CLK_DELAY_POS 4 -#define RGMII_TX_CLK_DELAY_MASK 0x0007 -#define RGMII_TX_CLK_DELAY_POS 0 +/* RGMII setting controls at address 18E2, for VSC8572 and similar */ +#define VSC8572_RGMII_CNTL 18 +#define VSC8572_RGMII_RX_DELAY_MASK 0x000E +#define VSC8572_RGMII_TX_DELAY_MASK 0x0070 + +/* RGMII controls at address 20E2, for VSC8502 and similar */ +#define VSC8502_RGMII_CNTL 20 +#define VSC8502_RGMII_RX_DELAY_MASK 0x0070 +#define VSC8502_RGMII_TX_DELAY_MASK 0x0007 #define MSCC_PHY_WOL_LOWER_MAC_ADDR 21 #define MSCC_PHY_WOL_MID_MAC_ADDR 22 diff --git a/drivers/net/phy/mscc/mscc_main.c b/drivers/net/phy/mscc/mscc_main.c index 19603081dd14..acddef79f4e8 100644 --- a/drivers/net/phy/mscc/mscc_main.c +++ b/drivers/net/phy/mscc/mscc_main.c @@ -520,28 +520,34 @@ out_unlock: return rc; } -static int vsc85xx_default_config(struct phy_device *phydev) +/* Set the RGMII RX and TX clock skews individually, according to the PHY + * interface type, to: + * * 0.2 ns (their default, and lowest, hardware value) if delays should + * not be enabled + * * 2.0 ns (which causes the data to be sampled at exactly half way between + * clock transitions at 1000 Mbps) if delays should be enabled + */ +static int vsc85xx_rgmii_set_skews(struct phy_device *phydev, u32 rgmii_cntl, + u16 rgmii_rx_delay_mask, + u16 rgmii_tx_delay_mask) { + u16 rgmii_rx_delay_pos = ffs(rgmii_rx_delay_mask) - 1; + u16 rgmii_tx_delay_pos = ffs(rgmii_tx_delay_mask) - 1; u16 reg_val = 0; int rc; - phydev->mdix_ctrl = ETH_TP_MDI_AUTO; - - if (!phy_interface_mode_is_rgmii(phydev->interface)) - return 0; - mutex_lock(&phydev->lock); if (phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID || phydev->interface == PHY_INTERFACE_MODE_RGMII_ID) - reg_val |= RGMII_CLK_DELAY_2_0_NS << RGMII_RX_CLK_DELAY_POS; + reg_val |= RGMII_CLK_DELAY_2_0_NS << rgmii_rx_delay_pos; if (phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID || phydev->interface == PHY_INTERFACE_MODE_RGMII_ID) - reg_val |= RGMII_CLK_DELAY_2_0_NS << RGMII_TX_CLK_DELAY_POS; + reg_val |= RGMII_CLK_DELAY_2_0_NS << rgmii_tx_delay_pos; rc = phy_modify_paged(phydev, MSCC_PHY_PAGE_EXTENDED_2, - MSCC_PHY_RGMII_CNTL, - RGMII_RX_CLK_DELAY_MASK | RGMII_TX_CLK_DELAY_MASK, + rgmii_cntl, + rgmii_rx_delay_mask | rgmii_tx_delay_mask, reg_val); mutex_unlock(&phydev->lock); @@ -549,6 +555,23 @@ static int vsc85xx_default_config(struct phy_device *phydev) return rc; } +static int vsc85xx_default_config(struct phy_device *phydev) +{ + int rc; + + phydev->mdix_ctrl = ETH_TP_MDI_AUTO; + + if (phy_interface_mode_is_rgmii(phydev->interface)) { + rc = vsc85xx_rgmii_set_skews(phydev, VSC8502_RGMII_CNTL, + VSC8502_RGMII_RX_DELAY_MASK, + VSC8502_RGMII_TX_DELAY_MASK); + if (rc) + return rc; + } + + return 0; +} + static int vsc85xx_get_tunable(struct phy_device *phydev, struct ethtool_tunable *tuna, void *data) { @@ -1301,32 +1324,6 @@ static bool vsc8584_is_pkg_init(struct phy_device *phydev, bool reversed) return false; } -static void vsc8584_rgmii_set_skews(struct phy_device *phydev) -{ - u32 skew_rx, skew_tx; - - /* We first set the Rx and Tx skews to their default value in h/w - * (0.2 ns). - */ - skew_rx = VSC8584_RGMII_SKEW_0_2; - skew_tx = VSC8584_RGMII_SKEW_0_2; - - /* We then set the skews based on the interface mode. */ - if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID || - phydev->interface == PHY_INTERFACE_MODE_RGMII_RXID) - skew_rx = VSC8584_RGMII_SKEW_2_0; - if (phydev->interface == PHY_INTERFACE_MODE_RGMII_ID || - phydev->interface == PHY_INTERFACE_MODE_RGMII_TXID) - skew_tx = VSC8584_RGMII_SKEW_2_0; - - /* Finally we apply the skews configuration. */ - phy_modify_paged(phydev, MSCC_PHY_PAGE_EXTENDED_2, - MSCC_PHY_RGMII_SETTINGS, - (0x7 << RGMII_SKEW_RX_POS) | (0x7 << RGMII_SKEW_TX_POS), - (skew_rx << RGMII_SKEW_RX_POS) | - (skew_tx << RGMII_SKEW_TX_POS)); -} - static int vsc8584_config_init(struct phy_device *phydev) { struct vsc8531_private *vsc8531 = phydev->priv; @@ -1461,8 +1458,13 @@ static int vsc8584_config_init(struct phy_device *phydev) if (ret) return ret; - if (phy_interface_is_rgmii(phydev)) - vsc8584_rgmii_set_skews(phydev); + if (phy_interface_is_rgmii(phydev)) { + ret = vsc85xx_rgmii_set_skews(phydev, VSC8572_RGMII_CNTL, + VSC8572_RGMII_RX_DELAY_MASK, + VSC8572_RGMII_TX_DELAY_MASK); + if (ret) + return ret; + } ret = genphy_soft_reset(phydev); if (ret) |