From: David Updegraff dave@cray.com
When bringing up u-boot on new boards, PHY support sometimes gets neglected. Most PHYs don't really need any special support, though. By adding a generic entry that always matches if nothing else does, we can provide support for "unsupported" PHYs for the tsec.
The generic PHY driver supports most PHYs, including gigabit.
Signed-off-by: David Updegraff dave@cray.com Signed-off-by: Andy Fleming afleming@freescale.com ---
I have unwound my tree, and applied this patch in place of the previous one.
drivers/tsec.c | 93 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 files changed, 93 insertions(+), 0 deletions(-)
diff --git a/drivers/tsec.c b/drivers/tsec.c index ed35f22..25566a7 100644 --- a/drivers/tsec.c +++ b/drivers/tsec.c @@ -385,6 +385,76 @@ uint mii_parse_sr(uint mii_reg, struct tsec_private * priv) return 0; }
+/* Generic function which updates the speed and duplex. If + * autonegotiation is enabled, it uses the AND of the link + * partner's advertised capabilities and our advertised + * capabilities. If autonegotiation is disabled, we use the + * appropriate bits in the control register. + * + * Stolen from Linux's mii.c and phy_device.c + */ +uint mii_parse_link(uint mii_reg, struct tsec_private *priv) +{ + /* We're using autonegotiation */ + if (mii_reg & PHY_BMSR_AUTN_ABLE) { + uint lpa = 0; + uint gblpa = 0; + + /* Check for gigabit capability */ + if (mii_reg & PHY_BMSR_EXT) { + /* We want a list of states supported by + * both PHYs in the link + */ + gblpa = read_phy_reg(priv, PHY_1000BTSR); + gblpa &= read_phy_reg(priv, PHY_1000BTCR) << 2; + } + + /* Set the baseline so we only have to set them + * if they're different + */ + priv->speed = 10; + priv->duplexity = 0; + + /* Check the gigabit fields */ + if (gblpa & (PHY_1000BTSR_1000FD | PHY_1000BTSR_1000HD)) { + priv->speed = 1000; + + if (gblpa & PHY_1000BTSR_1000FD) + priv->duplexity = 1; + + /* We're done! */ + return 0; + } + + lpa = read_phy_reg(priv, PHY_ANAR); + lpa &= read_phy_reg(priv, PHY_ANLPAR); + + if (lpa & (PHY_ANLPAR_TXFD | PHY_ANLPAR_TX)) { + priv->speed = 100; + + if (lpa & PHY_ANLPAR_TXFD) + priv->duplexity = 1; + + } else if (lpa & PHY_ANLPAR_10FD) + priv->duplexity = 1; + } else { + uint bmcr = read_phy_reg(priv, PHY_BMCR); + + priv->speed = 10; + priv->duplexity = 0; + + if (bmcr & PHY_BMCR_DPLX) + priv->duplexity = 1; + + if (bmcr & PHY_BMCR_1000_MBPS) + priv->speed = 1000; + else if (bmcr & PHY_BMCR_100_MBPS) + priv->speed = 100; + } + + return 0; +} + /* * Parse the BCM54xx status register for speed and duplex information. * The linux sungem_phy has this information, but in a table format. @@ -722,6 +792,7 @@ static void startup_tsec(struct eth_device *dev) /* Start up the PHY */ if(priv->phyinfo) phy_run_commands(priv, priv->phyinfo->startup); + adjust_link(dev);
/* Enable Transmit and Receive */ @@ -1092,6 +1163,27 @@ struct phy_info phy_info_dm9161 = { {miim_end,} }, }; +/* a generic flavor. */ +struct phy_info phy_info_generic = { + 0, + "Unknown/Generic PHY", + 32, + (struct phy_cmd[]) { /* config */ + {PHY_BMCR, PHY_BMCR_RESET, NULL}, + {PHY_BMCR, PHY_BMCR_AUTON|PHY_BMCR_RST_NEG, NULL}, + {miim_end,} + }, + (struct phy_cmd[]) { /* startup */ + {PHY_BMSR, miim_read, NULL}, + {PHY_BMSR, miim_read, &mii_parse_sr}, + {PHY_BMSR, miim_read, &mii_parse_link}, + {miim_end,} + }, + (struct phy_cmd[]) { /* shutdown */ + {miim_end,} + } +}; +
uint mii_parse_lxt971_sr2(uint mii_reg, struct tsec_private *priv) { @@ -1207,6 +1299,7 @@ struct phy_info *phy_info[] = { &phy_info_lxt971, &phy_info_VSC8244, &phy_info_dp83865, + &phy_info_generic, NULL };