| /* |
| * Copyright 2014 Google Inc. |
| * |
| * This program is free software; you can redistribute it and/or |
| * modify it under the terms of the GNU General Public License as |
| * published by the Free Software Foundation; either version 2 of |
| * the License, or (at your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, |
| * but without any warranty; without even the implied warranty of |
| * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| * GNU General Public License for more details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 59 Temple Place, Suite 330, Boston, |
| * MA 02111-1307 USA |
| */ |
| |
| #include <stdint.h> |
| #include <stdio.h> |
| |
| #include "drivers/net/mii.h" |
| #include "drivers/net/net.h" |
| |
| static int mii_restart_autoneg(MdioOps *mdio) |
| { |
| uint16_t bmsr; |
| if (mdio_read(mdio, MiiBmsr, &bmsr)) |
| return 1; |
| |
| if (!(bmsr & BmsrAnegCapable)) { |
| printf("No AutoNeg, falling back to 100baseTX\n"); |
| return mdio_write(mdio, MiiBmcr, BmcrSpeedSel | BmcrDuplexMode); |
| } else { |
| return mdio_write(mdio, MiiBmcr, |
| BmcrAutoNegEnable | BmcrRestartAutoNeg); |
| } |
| } |
| |
| int mii_phy_initialize(MdioOps *mdio) |
| { |
| if (mdio_write(mdio, MiiBmcr, BmcrReset)) |
| return 1; |
| if (mdio_write(mdio, MiiAnar, AdvertiseAll | AdvertiseCsma)) |
| return 1; |
| |
| if (mii_restart_autoneg(mdio)) |
| return 1; |
| return 0; |
| } |
| |
| int mii_ready(MdioOps *mdio, int *ready) |
| { |
| uint16_t link_status = 0; |
| if (mdio_read(mdio, MiiBmsr, &link_status)) { |
| printf("Failed to read BMSR.\n"); |
| return 1; |
| } |
| *ready = (link_status & BmsrLstatus); |
| return 0; |
| } |