Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / drivers / net / ethernet / stmicro / stmmac / dwmac-meson.c

diff --git a/kernel/drivers/net/ethernet/stmicro/stmmac/dwmac-meson.c b/kernel/drivers/net/ethernet/stmicro/stmmac/dwmac-meson.c
new file mode 100644 (file)
index 0000000..cca028d
--- /dev/null
+++ b/kernel/drivers/net/ethernet/stmicro/stmmac/dwmac-meson.c
@@ -0,0 +1,69 @@
+/*
+ * Amlogic Meson DWMAC glue layer
+ *
+ * Copyright (C) 2014 Beniamino Galvani <b.galvani@gmail.com>
+ *
+ * This program 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.
+ *
+ * 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/device.h>
+#include <linux/ethtool.h>
+#include <linux/io.h>
+#include <linux/ioport.h>
+#include <linux/platform_device.h>
+#include <linux/stmmac.h>
+
+#include "stmmac_platform.h"
+
+#define ETHMAC_SPEED_100       BIT(1)
+
+struct meson_dwmac {
+       struct device   *dev;
+       void __iomem    *reg;
+};
+
+static void meson6_dwmac_fix_mac_speed(void *priv, unsigned int speed)
+{
+       struct meson_dwmac *dwmac = priv;
+       unsigned int val;
+
+       val = readl(dwmac->reg);
+
+       switch (speed) {
+       case SPEED_10:
+               val &= ~ETHMAC_SPEED_100;
+               break;
+       case SPEED_100:
+               val |= ETHMAC_SPEED_100;
+               break;
+       }
+
+       writel(val, dwmac->reg);
+}
+
+static void *meson6_dwmac_setup(struct platform_device *pdev)
+{
+       struct meson_dwmac *dwmac;
+       struct resource *res;
+
+       dwmac = devm_kzalloc(&pdev->dev, sizeof(*dwmac), GFP_KERNEL);
+       if (!dwmac)
+               return ERR_PTR(-ENOMEM);
+
+       res = platform_get_resource(pdev, IORESOURCE_MEM, 1);
+       dwmac->reg = devm_ioremap_resource(&pdev->dev, res);
+       if (IS_ERR(dwmac->reg))
+               return ERR_CAST(dwmac->reg);
+
+       return dwmac;
+}
+
+const struct stmmac_of_data meson6_dwmac_data = {
+       .setup          = meson6_dwmac_setup,
+       .fix_mac_speed  = meson6_dwmac_fix_mac_speed,
+};