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Add support for treating unknown PHYs as generic PHYs.

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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>
This commit is contained in:
David Updegraff 2007-04-20 14:34:48 -05:00 committed by Andrew Fleming-AFLEMING
parent 66ed6cca3f
commit af1c2b84bf
1 changed files with 93 additions and 0 deletions
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93
drivers/tsec.c
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@ -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
};