m68k: add dm fec support

Add architecture-related code for dm fec support.

Signed-off-by: Angelo Durgehello <angelo.dureghello@timesys.com>

1 files changed, 79 insertions, 0 deletions

diff --git a/arch/m68k/lib/fec.c b/arch/m68k/lib/fec.c
new file mode 100644
index 00000000000..dde353ad17f
--- /dev/null
+++ b/arch/m68k/lib/fec.c
@@ -0,0 +1,79 @@
+// SPDX-License-Identifier: GPL-2.0+
+/*
+ * (C) 2019 Angelo Dureghello <angelo.dureghello@timesys.com>
+ */
+
+#include <common.h>
+#include <linux/libfdt.h>
+#include <fdt_support.h>
+
+DECLARE_GLOBAL_DATA_PTR;
+
+#if defined(CONFIG_MCFFEC) || defined(CONFIG_FSLDMAFEC)
+static int fec_get_node(int fec_idx)
+{
+	char fec_alias[5] = {"fec"};
+	const char *path;
+	int node;
+
+	if (fec_idx > 1) {
+		puts("Invalid MII base index");
+		return -ENOENT;
+	}
+
+	fec_alias[3] = fec_idx + '0';
+
+	path = fdt_get_alias(gd->fdt_blob, fec_alias);
+	if (!path) {
+		puts("Invalid MII path");
+		return -ENOENT;
+	}
+
+	node = fdt_path_offset(gd->fdt_blob, path);
+	if (node < 0)
+		return -ENOENT;
+
+	return node;
+}
+
+int fec_get_fdt_prop(int fec_idx, const char *prop, u32 *value)
+{
+	int node;
+	const u32 *val;
+
+	node = fec_get_node(fec_idx);
+	if (node < 0)
+		return node;
+
+	val = fdt_getprop(gd->fdt_blob, node, prop, NULL);
+	if (!val)
+		return -ENOENT;
+
+	*value = fdt32_to_cpu(*val);
+
+	return 0;
+}
+
+int fec_get_base_addr(int fec_idx, u32 *fec_iobase)
+{
+	int node;
+	fdt_size_t size;
+	fdt_addr_t addr;
+
+	node = fec_get_node(fec_idx);
+	if (node < 0)
+		return node;
+
+	addr = fdtdec_get_addr_size(gd->fdt_blob, node, "reg", &size);
+
+	*fec_iobase = (u32)addr;
+
+	return 0;
+}
+
+int fec_get_mii_base(int fec_idx, u32 *mii_base)
+{
+	return fec_get_fdt_prop(fec_idx, "mii-base", mii_base);
+}
+
+#endif //CONFIG_MCFFEC || CONFIG_FSLDMAFEC