Staging: Add octeon-ethernet driver files.

The octeon-ethernet driver supports the sgmii, rgmii, spi, and xaui
ports present on the Cavium OCTEON family of SOCs.  These SOCs are
multi-core mips64 processors with existing support over in arch/mips.

The driver files can be categorized into three basic groups:

1) Register definitions, these are named cvmx-*-defs.h

2) Main driver code, these have names that don't start cvmx-.

3) Interface specific functions and other utility code, names starting
with cvmx-

Signed-off-by: David Daney <ddaney@caviumnetworks.com>
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

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;
+}