drivers: net: Add APM X-Gene SoC ethernet driver support.

This patch adds network driver for APM X-Gene SoC ethernet.

Signed-off-by: Iyappan Subramanian <isubramanian@apm.com>
Signed-off-by: Ravi Patel <rapatel@apm.com>
Signed-off-by: Keyur Chudgar <kchudgar@apm.com>
Signed-off-by: Dean Nelson <dnelson@redhat.com>
Reviewed-by: Tobias Klauser <tklauser@distanz.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>

11 files changed, 2299 insertions, 0 deletions

diff --git a/drivers/net/ethernet/Kconfig b/drivers/net/ethernet/Kconfig
index edb718661850..dc7406c81c45 100644
--- a/drivers/net/ethernet/Kconfig
+++ b/drivers/net/ethernet/Kconfig
@@ -24,6 +24,7 @@ source "drivers/net/ethernet/allwinner/Kconfig"
 source "drivers/net/ethernet/alteon/Kconfig"
 source "drivers/net/ethernet/altera/Kconfig"
 source "drivers/net/ethernet/amd/Kconfig"
+source "drivers/net/ethernet/apm/Kconfig"
 source "drivers/net/ethernet/apple/Kconfig"
 source "drivers/net/ethernet/arc/Kconfig"
 source "drivers/net/ethernet/atheros/Kconfig"
diff --git a/drivers/net/ethernet/Makefile b/drivers/net/ethernet/Makefile
index 58de3339ab3c..224a01877149 100644
--- a/drivers/net/ethernet/Makefile
+++ b/drivers/net/ethernet/Makefile
@@ -10,6 +10,7 @@ obj-$(CONFIG_NET_VENDOR_ALLWINNER) += allwinner/
 obj-$(CONFIG_NET_VENDOR_ALTEON) += alteon/
 obj-$(CONFIG_ALTERA_TSE) += altera/
 obj-$(CONFIG_NET_VENDOR_AMD) += amd/
+obj-$(CONFIG_NET_XGENE) += apm/
 obj-$(CONFIG_NET_VENDOR_APPLE) += apple/
 obj-$(CONFIG_NET_VENDOR_ARC) += arc/
 obj-$(CONFIG_NET_VENDOR_ATHEROS) += atheros/
diff --git a/drivers/net/ethernet/apm/Kconfig b/drivers/net/ethernet/apm/Kconfig
new file mode 100644
index 000000000000..ec63d706d464
--- /dev/null
+++ b/drivers/net/ethernet/apm/Kconfig
@@ -0,0 +1 @@
+source "drivers/net/ethernet/apm/xgene/Kconfig"
diff --git a/drivers/net/ethernet/apm/Makefile b/drivers/net/ethernet/apm/Makefile
new file mode 100644
index 000000000000..65ce32ad1b2c
--- /dev/null
+++ b/drivers/net/ethernet/apm/Makefile
@@ -0,0 +1,5 @@
+#
+# Makefile for APM X-GENE Ethernet driver.
+#
+
+obj-$(CONFIG_NET_XGENE) += xgene/
diff --git a/drivers/net/ethernet/apm/xgene/Kconfig b/drivers/net/ethernet/apm/xgene/Kconfig
new file mode 100644
index 000000000000..616dff6d3f5f
--- /dev/null
+++ b/drivers/net/ethernet/apm/xgene/Kconfig
@@ -0,0 +1,9 @@
+config NET_XGENE
+        tristate "APM X-Gene SoC Ethernet Driver"
+        select PHYLIB
+        help
+          This is the Ethernet driver for the on-chip ethernet interface on the
+          APM X-Gene SoC.
+
+          To compile this driver as a module, choose M here. This module will
+          be called xgene_enet.
diff --git a/drivers/net/ethernet/apm/xgene/Makefile b/drivers/net/ethernet/apm/xgene/Makefile
new file mode 100644
index 000000000000..c643e8a0a0dc
--- /dev/null
+++ b/drivers/net/ethernet/apm/xgene/Makefile
@@ -0,0 +1,6 @@
+#
+# Makefile for APM X-Gene Ethernet Driver.
+#
+
+xgene-enet-objs := xgene_enet_hw.o xgene_enet_main.o xgene_enet_ethtool.o
+obj-$(CONFIG_NET_XGENE) += xgene-enet.o
diff --git a/drivers/net/ethernet/apm/xgene/xgene_enet_ethtool.c b/drivers/net/ethernet/apm/xgene/xgene_enet_ethtool.c
new file mode 100644
index 000000000000..63f2aa54a594
--- /dev/null
+++ b/drivers/net/ethernet/apm/xgene/xgene_enet_ethtool.c
@@ -0,0 +1,125 @@
+/* Applied Micro X-Gene SoC Ethernet Driver
+ *
+ * Copyright (c) 2014, Applied Micro Circuits Corporation
+ * Authors: Iyappan Subramanian <isubramanian@apm.com>
+ *
+ * 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, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <linux/ethtool.h>
+#include "xgene_enet_main.h"
+
+struct xgene_gstrings_stats {
+        char name[ETH_GSTRING_LEN];
+        int offset;
+};
+
+#define XGENE_STAT(m) { #m, offsetof(struct xgene_enet_pdata, stats.m) }
+
+static const struct xgene_gstrings_stats gstrings_stats[] = {
+        XGENE_STAT(rx_packets),
+        XGENE_STAT(tx_packets),
+        XGENE_STAT(rx_bytes),
+        XGENE_STAT(tx_bytes),
+        XGENE_STAT(rx_errors),
+        XGENE_STAT(tx_errors),
+        XGENE_STAT(rx_length_errors),
+        XGENE_STAT(rx_crc_errors),
+        XGENE_STAT(rx_frame_errors),
+        XGENE_STAT(rx_fifo_errors)
+};
+
+#define XGENE_STATS_LEN         ARRAY_SIZE(gstrings_stats)
+
+static void xgene_get_drvinfo(struct net_device *ndev,
+                              struct ethtool_drvinfo *info)
+{
+        struct xgene_enet_pdata *pdata = netdev_priv(ndev);
+        struct platform_device *pdev = pdata->pdev;
+
+        strcpy(info->driver, "xgene_enet");
+        strcpy(info->version, XGENE_DRV_VERSION);
+        snprintf(info->fw_version, ETHTOOL_FWVERS_LEN, "N/A");
+        sprintf(info->bus_info, "%s", pdev->name);
+}
+
+static int xgene_get_settings(struct net_device *ndev, struct ethtool_cmd *cmd)
+{
+        struct xgene_enet_pdata *pdata = netdev_priv(ndev);
+        struct phy_device *phydev = pdata->phy_dev;
+
+        if (phydev == NULL)
+                return -ENODEV;
+
+        return phy_ethtool_gset(phydev, cmd);
+}
+
+static int xgene_set_settings(struct net_device *ndev, struct ethtool_cmd *cmd)
+{
+        struct xgene_enet_pdata *pdata = netdev_priv(ndev);
+        struct phy_device *phydev = pdata->phy_dev;
+
+        if (phydev == NULL)
+                return -ENODEV;
+
+        return phy_ethtool_sset(phydev, cmd);
+}
+
+static void xgene_get_strings(struct net_device *ndev, u32 stringset, u8 *data)
+{
+        int i;
+        u8 *p = data;
+
+        if (stringset != ETH_SS_STATS)
+                return;
+
+        for (i = 0; i < XGENE_STATS_LEN; i++) {
+                memcpy(p, gstrings_stats[i].name, ETH_GSTRING_LEN);
+                p += ETH_GSTRING_LEN;
+        }
+}
+
+static int xgene_get_sset_count(struct net_device *ndev, int sset)
+{
+        if (sset != ETH_SS_STATS)
+                return -EINVAL;
+
+        return XGENE_STATS_LEN;
+}
+
+static void xgene_get_ethtool_stats(struct net_device *ndev,
+                                    struct ethtool_stats *dummy,
+                                    u64 *data)
+{
+        void *pdata = netdev_priv(ndev);
+        int i;
+
+        for (i = 0; i < XGENE_STATS_LEN; i++)
+                *data++ = *(u64 *)(pdata + gstrings_stats[i].offset);
+}
+
+static const struct ethtool_ops xgene_ethtool_ops = {
+        .get_drvinfo = xgene_get_drvinfo,
+        .get_settings = xgene_get_settings,