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, 129 insertions, 0 deletions

diff --git a/drivers/staging/octeon/ethernet-sgmii.c b/drivers/staging/octeon/ethernet-sgmii.c
new file mode 100644
index 0000000..58fa39c
--- /dev/null
+++ b/drivers/staging/octeon/ethernet-sgmii.c
@@ -0,0 +1,129 @@
+/**********************************************************************
+ * 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/netdevice.h>
+#include <linux/mii.h>
+#include <net/dst.h>
+
+#include <asm/octeon/octeon.h>
+
+#include "ethernet-defines.h"
+#include "octeon-ethernet.h"
+#include "ethernet-util.h"
+#include "ethernet-common.h"
+
+#include "cvmx-helper.h"
+
+#include "cvmx-gmxx-defs.h"
+
+static int cvm_oct_sgmii_open(struct net_device *dev)
+{
+	union cvmx_gmxx_prtx_cfg gmx_cfg;
+	struct octeon_ethernet *priv = netdev_priv(dev);
+	int interface = INTERFACE(priv->port);
+	int index = INDEX(priv->port);
+	cvmx_helper_link_info_t link_info;
+
+	gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
+	gmx_cfg.s.en = 1;
+	cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64);
+
+	if (!octeon_is_simulation()) {
+		link_info = cvmx_helper_link_get(priv->port);
+		if (!link_info.s.link_up)
+			netif_carrier_off(dev);
+	}
+
+	return 0;
+}
+
+static int cvm_oct_sgmii_stop(struct net_device *dev)
+{
+	union cvmx_gmxx_prtx_cfg gmx_cfg;
+	struct octeon_ethernet *priv = netdev_priv(dev);
+	int interface = INTERFACE(priv->port);
+	int index = INDEX(priv->port);
+
+	gmx_cfg.u64 = cvmx_read_csr(CVMX_GMXX_PRTX_CFG(index, interface));
+	gmx_cfg.s.en = 0;
+	cvmx_write_csr(CVMX_GMXX_PRTX_CFG(index, interface), gmx_cfg.u64);
+	return 0;
+}
+
+static void cvm_oct_sgmii_poll(struct net_device *dev)
+{
+	struct octeon_ethernet *priv = netdev_priv(dev);
+	cvmx_helper_link_info_t link_info;
+
+	link_info = cvmx_helper_link_get(priv->port);
+	if (link_info.u64 == priv->link_info)
+		return;
+
+	link_info = cvmx_helper_link_autoconf(priv->port);
+	priv->link_info = link_info.u64;
+
+	/* Tell Linux */
+	if (link_info.s.link_up) {
+
+		if (!netif_carrier_ok(dev))
+			netif_carrier_on(dev);
+		if (priv->queue != -1)
+			DEBUGPRINT
+			    ("%s: %u Mbps %s duplex, port %2d, queue %2d\n",
+			     dev->name, link_info.s.speed,
+			     (link_info.s.full_duplex) ? "Full" : "Half",
+			     priv->port, priv->queue);
+		else
+			DEBUGPRINT("%s: %u Mbps %s duplex, port %2d, POW\n",
+				   dev->name, link_info.s.speed,
+				   (link_info.s.full_duplex) ? "Full" : "Half",
+				   priv->port);
+	} else {
+		if (netif_carrier_ok(dev))
+			netif_carrier_off(dev);
+		DEBUGPRINT("%s: Link down\n", dev->name);
+	}
+}
+
+int cvm_oct_sgmii_init(struct net_device *dev)
+{
+	struct octeon_ethernet *priv = netdev_priv(dev);
+	cvm_oct_common_init(dev);
+	dev->open = cvm_oct_sgmii_open;
+	dev->stop = cvm_oct_sgmii_stop;
+	dev->stop(dev);
+	if (!octeon_is_simulation())
+		priv->poll = cvm_oct_sgmii_poll;
+
+	/* FIXME: Need autoneg logic */
+	return 0;
+}
+
+void cvm_oct_sgmii_uninit(struct net_device *dev)
+{
+	cvm_oct_common_uninit(dev);
+}