diff options
| author | Manjunath Hadli <manjunath.hadli@ti.com> | 2011-10-13 03:40:53 (GMT) |
|---|---|---|
| committer | Albert ARIBAUD <albert.u.boot@aribaud.net> | 2011-10-27 19:56:36 (GMT) |
| commit | cc4bd47f4f8d11af50ab56caa9ece29ac13fc5c3 (patch) | |
| tree | ef6a02ad9aab0e29be9e321ce831e0e327b7cd9f /drivers/net/davinci_emac.c | |
| parent | ae5c77dd908edaf55025fa3f41095bfb9cb1b973 (diff) | |
| download | u-boot-cc4bd47f4f8d11af50ab56caa9ece29ac13fc5c3.tar.xz | |
davinci: emac: add new features to autonegotiate for EMAC
add more features like DUPLEX, 100MB link speed etc to auto negotiate
in EMAC driver. EMAC controller autonegotiates for these features with
PHYs which are on the board.
Signed-off-by: Sudhakar Rajashekhara <sudhakar.raj@ti.com>
Signed-off-by: Manjunath Hadli <manjunath.hadli@ti.com>
Signed-off-by: Sandeep Paulraj <s-paulraj@ti.com>
Diffstat (limited to 'drivers/net/davinci_emac.c')
| -rw-r--r-- | drivers/net/davinci_emac.c | 30 |
1 files changed, 28 insertions, 2 deletions
diff --git a/drivers/net/davinci_emac.c b/drivers/net/davinci_emac.c index a8905b8..52617a7 100644 --- a/drivers/net/davinci_emac.c +++ b/drivers/net/davinci_emac.c @@ -279,16 +279,42 @@ static int gen_get_link_speed(int phy_addr) static int gen_auto_negotiate(int phy_addr) { u_int16_t tmp; + u_int16_t val; + unsigned long cntr = 0; + + if (!davinci_eth_phy_read(phy_addr, MII_BMCR, &tmp)) + return 0; + + val = tmp | BMCR_FULLDPLX | BMCR_ANENABLE | + BMCR_SPEED100; + davinci_eth_phy_write(phy_addr, MII_BMCR, val); + + if (!davinci_eth_phy_read(phy_addr, MII_ADVERTISE, &val)) + return 0; + + val |= (ADVERTISE_100FULL | ADVERTISE_100HALF | ADVERTISE_10FULL | + ADVERTISE_10HALF); + davinci_eth_phy_write(phy_addr, MII_ADVERTISE, val); if (!davinci_eth_phy_read(phy_addr, MII_BMCR, &tmp)) return(0); /* Restart Auto_negotiation */ - tmp |= BMCR_ANENABLE; + tmp |= BMCR_ANRESTART; davinci_eth_phy_write(phy_addr, MII_BMCR, tmp); /*check AutoNegotiate complete */ - udelay (10000); + do { + udelay(40000); + if (!davinci_eth_phy_read(phy_addr, MII_BMSR, &tmp)) + return 0; + + if (tmp & BMSR_ANEGCOMPLETE) + break; + + cntr++; + } while (cntr < 200); + if (!davinci_eth_phy_read(phy_addr, MII_BMSR, &tmp)) return(0); |