* Copyright (c) 2006 Herbert Valerio Riedel <hvr@gnu.org>
*/
#include <miiphy.h>
+#include <errno.h>
+
+#define MII_LAN83C185_CTRL_STATUS 17 /* Mode/Status Register */
+#define MII_LAN83C185_EDPWRDOWN (1 << 13) /* EDPWRDOWN */
+#define MII_LAN83C185_ENERGYON (1 << 1) /* ENERGYON */
/* This code does not check the partner abilities. */
static int smsc_parse_status(struct phy_device *phydev)
{
- int mii_reg;
+ int bmcr;
+ int aneg_exp;
+ int mii_adv;
+ int lpa;
+
+ aneg_exp = phy_read(phydev, MDIO_DEVAD_NONE, MII_EXPANSION);
+ if (aneg_exp < 0)
+ return aneg_exp;
+
+ if (aneg_exp & EXPANSION_MFAULTS) {
+ /* second read to clear latched status */
+ aneg_exp = phy_read(phydev, MDIO_DEVAD_NONE, MII_EXPANSION);
+ if (aneg_exp & EXPANSION_MFAULTS)
+ return -EIO;
+ }
- mii_reg = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMSR);
+ bmcr = phy_read(phydev, MDIO_DEVAD_NONE, MII_BMCR);
+ if (bmcr < 0)
+ return bmcr;
+ if (bmcr & BMCR_ANENABLE) {
+ lpa = phy_read(phydev, MDIO_DEVAD_NONE, MII_LPA);
+ if (lpa < 0)
+ return lpa;
+ mii_adv = phy_read(phydev, MDIO_DEVAD_NONE, MII_ADVERTISE);
+ if (mii_adv < 0)
+ return mii_adv;
+ lpa &= mii_adv;
- if (mii_reg & (BMSR_100FULL | BMSR_100HALF))
- phydev->speed = SPEED_100;
- else
- phydev->speed = SPEED_10;
+ if (!(aneg_exp & EXPANSION_NWAY)) {
+ /* parallel detection */
+ phydev->duplex = DUPLEX_HALF;
+ if (lpa & (LPA_100HALF | LPA_100FULL))
+ phydev->speed = SPEED_100;
+ else
+ phydev->speed = SPEED_10;
+ }
- if (mii_reg & (BMSR_10FULL | BMSR_100FULL))
- phydev->duplex = DUPLEX_FULL;
- else
- phydev->duplex = DUPLEX_HALF;
+ if (lpa & (LPA_100FULL | LPA_100HALF)) {
+ phydev->speed = SPEED_100;
+ if (lpa & LPA_100FULL)
+ phydev->duplex = DUPLEX_FULL;
+ else
+ phydev->duplex = DUPLEX_HALF;
+ } else if (lpa & (LPA_10FULL | LPA_10HALF)) {
+ phydev->speed = SPEED_10;
+ if (lpa & LPA_10FULL)
+ phydev->duplex = DUPLEX_FULL;
+ else
+ phydev->duplex = DUPLEX_HALF;
+ } else {
+ return -EINVAL;
+ }
+ } else {
+ if (bmcr & BMCR_SPEED100)
+ phydev->speed = SPEED_100;
+ else
+ phydev->speed = SPEED_10;
+ if (bmcr & BMCR_FULLDPLX)
+ phydev->duplex = DUPLEX_FULL;
+ else
+ phydev->duplex = DUPLEX_HALF;
+ }
return 0;
}
static int smsc_startup(struct phy_device *phydev)
{
- genphy_update_link(phydev);
- smsc_parse_status(phydev);
- return 0;
+ int ret;
+
+ if (!phydev->link) {
+ /* Disable EDPD to wake up PHY */
+ ret = phy_read(phydev, MDIO_DEVAD_NONE, MII_LAN83C185_CTRL_STATUS);
+
+ if (ret < 0)
+ return ret;
+
+ if (ret & MII_LAN83C185_EDPWRDOWN) {
+ ret = phy_write(phydev, MDIO_DEVAD_NONE, MII_LAN83C185_CTRL_STATUS,
+ ret & ~MII_LAN83C185_EDPWRDOWN);
+ if (ret < 0)
+ return ret;
+
+ /* Sleep 64 ms to allow ~5 link test pulses to be sent */
+ udelay(64 * 1000);
+ }
+ }
+
+ ret = genphy_update_link(phydev);
+ if (ret < 0)
+ return ret;
+ return smsc_parse_status(phydev);
+}
+
+static int smsc_mdix_setup(struct phy_device *phydev)
+{
+ int ret;
+ static const char *mdix = "_mdi";
+ char varname[strlen(phydev->bus->name) + strlen(mdix) + 1];
+ const char *val;
+
+ snprintf(varname, sizeof(varname), "%s%s", phydev->bus->name, mdix);
+
+ val = getenv(varname);
+ if (val) {
+ if (strcasecmp(val, "auto") == 0) {
+ ret = 0;
+ } else if (strcasecmp(val, "mdix") == 0) {
+ ret = 1;
+ } else if (strcasecmp(val, "mdi") == 0) {
+ ret = 2;
+ } else {
+ printf("Improper setting '%s' for %s\n", val, varname);
+ printf("Expected one of: 'auto', 'mdi', 'mdix'\n");
+ return -EINVAL;
+ }
+ } else {
+ ret = 0;
+ }
+ return ret;
+}
+
+static int smsc_config(struct phy_device *phydev)
+{
+ int mdix = smsc_mdix_setup(phydev);
+
+ if (mdix < 0) {
+ return mdix;
+ } else if (mdix) {
+ int ret = phy_write(phydev, MDIO_DEVAD_NONE, 0x1b,
+ (1 << 15) | ((mdix & 1) << 13));
+ if (ret) {
+ printf("Failed to setup MDI/MDIX mode: %d\n", ret);
+ return ret;
+ }
+ }
+ return genphy_config_aneg(phydev);
}
static struct phy_driver lan8700_driver = {
.uid = 0x0007c0f0,
.mask = 0xffff0,
.features = PHY_BASIC_FEATURES,
- .config = &genphy_config_aneg,
- .startup = &genphy_startup,
+ .config = &smsc_config,
+ .startup = &smsc_startup,
.shutdown = &genphy_shutdown,
};