diff options
Diffstat (limited to 'drivers/staging/octeon/ethernet-mdio.c')
| -rw-r--r-- | drivers/staging/octeon/ethernet-mdio.c | 231 |
1 files changed, 231 insertions, 0 deletions
diff --git a/drivers/staging/octeon/ethernet-mdio.c b/drivers/staging/octeon/ethernet-mdio.c new file mode 100644 index 000000000000..93cab0a48925 --- /dev/null +++ b/drivers/staging/octeon/ethernet-mdio.c @@ -0,0 +1,231 @@ +/********************************************************************** + * Author: Cavium Networks + * + * Contact: support@caviumnetworks.com + * This file is part of the OCTEON SDK + * + * Copyright (c) 2003-2007 Cavium Networks + * + * This file is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License, Version 2, as + * published by the Free Software Foundation. + * + * This file is distributed in the hope that it will be useful, but + * AS-IS and WITHOUT ANY WARRANTY; without even the implied warranty + * of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE, TITLE, or + * NONINFRINGEMENT. See the GNU General Public License for more + * details. + * + * You should have received a copy of the GNU General Public License + * along with this file; if not, write to the Free Software + * Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA + * or visit http://www.gnu.org/licenses/. + * + * This file may also be available under a different license from Cavium. + * Contact Cavium Networks for more information +**********************************************************************/ +#include <linux/kernel.h> +#include <linux/ethtool.h> +#include <linux/mii.h> +#include <net/dst.h> + +#include <asm/octeon/octeon.h> + +#include "ethernet-defines.h" +#include "octeon-ethernet.h" +#include "ethernet-mdio.h" + +#include "cvmx-helper-board.h" + +#include "cvmx-smix-defs.h" + +DECLARE_MUTEX(mdio_sem); + +/** + * Perform an MII read. Called by the generic MII routines + * + * @dev: Device to perform read for + * @phy_id: The MII phy id + * @location: Register location to read + * Returns Result from the read or zero on failure + */ +static int cvm_oct_mdio_read(struct net_device *dev, int phy_id, int location) +{ + union cvmx_smix_cmd smi_cmd; + union cvmx_smix_rd_dat smi_rd; + + smi_cmd.u64 = 0; + smi_cmd.s.phy_op = 1; + smi_cmd.s.phy_adr = phy_id; + smi_cmd.s.reg_adr = location; + cvmx_write_csr(CVMX_SMIX_CMD(0), smi_cmd.u64); + + do { + if (!in_interrupt()) + yield(); + smi_rd.u64 = cvmx_read_csr(CVMX_SMIX_RD_DAT(0)); + } while (smi_rd.s.pending); + + if (smi_rd.s.val) + return smi_rd.s.dat; + else + return 0; +} + +static int cvm_oct_mdio_dummy_read(struct net_device *dev, int phy_id, + int location) +{ + return 0xffff; +} + +/** + * Perform an MII write. Called by the generic MII routines + * + * @dev: Device to perform write for + * @phy_id: The MII phy id + * @location: Register location to write + * @val: Value to write + */ +static void cvm_oct_mdio_write(struct net_device *dev, int phy_id, int location, + int val) +{ + union cvmx_smix_cmd smi_cmd; + union cvmx_smix_wr_dat smi_wr; + + smi_wr.u64 = 0; + smi_wr.s.dat = val; + cvmx_write_csr(CVMX_SMIX_WR_DAT(0), smi_wr.u64); + + smi_cmd.u64 = 0; + smi_cmd.s.phy_op = 0; + smi_cmd.s.phy_adr = phy_id; + smi_cmd.s.reg_adr = location; + cvmx_write_csr(CVMX_SMIX_CMD(0), smi_cmd.u64); + + do { + if (!in_interrupt()) + yield(); + smi_wr.u64 = cvmx_read_csr(CVMX_SMIX_WR_DAT(0)); + } while (smi_wr.s.pending); +} + +static void cvm_oct_mdio_dummy_write(struct net_device *dev, int phy_id, + int location, int val) +{ +} + +static void cvm_oct_get_drvinfo(struct net_device *dev, + struct ethtool_drvinfo *info) +{ + strcpy(info->driver, "cavium-ethernet"); + strcpy(info->version, OCTEON_ETHERNET_VERSION); + strcpy(info->bus_info, "Builtin"); +} + +static int cvm_oct_get_settings(struct net_device *dev, struct ethtool_cmd *cmd) +{ + struct octeon_ethernet *priv = netdev_priv(dev); + int ret; + + down(&mdio_sem); + ret = mii_ethtool_gset(&priv->mii_info, cmd); + up(&mdio_sem); + + return ret; +} + +static int cvm_oct_set_settings(struct net_device *dev, struct ethtool_cmd *cmd) +{ + struct octeon_ethernet *priv = netdev_priv(dev); + int ret; + + down(&mdio_sem); + ret = mii_ethtool_sset(&priv->mii_info, cmd); + up(&mdio_sem); + + return ret; +} + +static int cvm_oct_nway_reset(struct net_device *dev) +{ + struct octeon_ethernet *priv = netdev_priv(dev); + int ret; + + down(&mdio_sem); + ret = mii_nway_restart(&priv->mii_info); + up(&mdio_sem); + + return ret; +} + +static u32 cvm_oct_get_link(struct net_device *dev) +{ + struct octeon_ethernet *priv = netdev_priv(dev); + u32 ret; + + down(&mdio_sem); + ret = mii_link_ok(&priv->mii_info); + up(&mdio_sem); + + return ret; +} + +struct ethtool_ops cvm_oct_ethtool_ops = { + .get_drvinfo = cvm_oct_get_drvinfo, + .get_settings = cvm_oct_get_settings, + .set_settings = cvm_oct_set_settings, + .nway_reset = cvm_oct_nway_reset, + .get_link = cvm_oct_get_link, + .get_sg = ethtool_op_get_sg, + .get_tx_csum = ethtool_op_get_tx_csum, +}; + +/** + * IOCTL support for PHY control + * + * @dev: Device to change + * @rq: the request + * @cmd: the command + * Returns Zero on success + */ +int cvm_oct_ioctl(struct net_device *dev, struct ifreq *rq, int cmd) +{ + struct octeon_ethernet *priv = netdev_priv(dev); + struct mii_ioctl_data *data = if_mii(rq); + unsigned int duplex_chg; + int ret; + + down(&mdio_sem); + ret = generic_mii_ioctl(&priv->mii_info, data, cmd, &duplex_chg); + up(&mdio_sem); + + return ret; +} + +/** + * Setup the MDIO device structures + * + * @dev: Device to setup + * + * Returns Zero on success, negative on failure + */ +int cvm_oct_mdio_setup_device(struct net_device *dev) +{ + struct octeon_ethernet *priv = netdev_priv(dev); + int phy_id = cvmx_helper_board_get_mii_address(priv->port); + if (phy_id != -1) { + priv->mii_info.dev = dev; + priv->mii_info.phy_id = phy_id; + priv->mii_info.phy_id_mask = 0xff; + priv->mii_info.supports_gmii = 1; + priv->mii_info.reg_num_mask = 0x1f; + priv->mii_info.mdio_read = cvm_oct_mdio_read; + priv->mii_info.mdio_write = cvm_oct_mdio_write; + } else { + /* Supply dummy MDIO routines so the kernel won't crash + if the user tries to read them */ + priv->mii_info.mdio_read = cvm_oct_mdio_dummy_read; + priv->mii_info.mdio_write = cvm_oct_mdio_dummy_write; + } + return 0; +} |