[Feature] add GA346 baseline version

Change-Id: Ic62933698569507dcf98240cdf5d9931ae34348f
diff --git a/src/kernel/linux/v4.19/drivers/of/of_net.c b/src/kernel/linux/v4.19/drivers/of/of_net.c
new file mode 100644
index 0000000..cf69435
--- /dev/null
+++ b/src/kernel/linux/v4.19/drivers/of/of_net.c
@@ -0,0 +1,203 @@
+/*
+ * OF helpers for network devices.
+ *
+ * This file is released under the GPLv2
+ *
+ * Initially copied out of arch/powerpc/kernel/prom_parse.c
+ */
+#include <linux/etherdevice.h>
+#include <linux/kernel.h>
+#include <linux/nvmem-consumer.h>
+#include <linux/of_net.h>
+#include <linux/phy.h>
+#include <linux/export.h>
+#include <linux/mtd/mtd.h>
+
+/**
+ * of_get_phy_mode - Get phy mode for given device_node
+ * @np:	Pointer to the given device_node
+ *
+ * The function gets phy interface string from property 'phy-mode' or
+ * 'phy-connection-type', and return its index in phy_modes table, or errno in
+ * error case.
+ */
+int of_get_phy_mode(struct device_node *np)
+{
+	const char *pm;
+	int err, i;
+
+	err = of_property_read_string(np, "phy-mode", &pm);
+	if (err < 0)
+		err = of_property_read_string(np, "phy-connection-type", &pm);
+	if (err < 0)
+		return err;
+
+	for (i = 0; i < PHY_INTERFACE_MODE_MAX; i++)
+		if (!strcasecmp(pm, phy_modes(i)))
+			return i;
+
+	return -ENODEV;
+}
+EXPORT_SYMBOL_GPL(of_get_phy_mode);
+
+static void *of_get_mac_addr(struct device_node *np, const char *name)
+{
+	struct property *pp = of_find_property(np, name, NULL);
+
+	if (pp && pp->length == ETH_ALEN && is_valid_ether_addr(pp->value))
+		return pp->value;
+	return NULL;
+}
+
+static const void *of_get_mac_address_mtd(struct device_node *np)
+{
+#ifdef CONFIG_MTD
+	struct device_node *mtd_np = NULL;
+	struct property *prop;
+	size_t retlen;
+	int size, ret;
+	struct mtd_info *mtd;
+	const char *part;
+	const __be32 *list;
+	phandle phandle;
+	u32 mac_inc = 0;
+	u8 mac[ETH_ALEN];
+	void *addr;
+	u32 inc_idx;
+
+	list = of_get_property(np, "mtd-mac-address", &size);
+	if (!list || (size != (2 * sizeof(*list))))
+		return NULL;
+
+	phandle = be32_to_cpup(list++);
+	if (phandle)
+		mtd_np = of_find_node_by_phandle(phandle);
+
+	if (!mtd_np)
+		return NULL;
+
+	part = of_get_property(mtd_np, "label", NULL);
+	if (!part)
+		part = mtd_np->name;
+
+	mtd = get_mtd_device_nm(part);
+	if (IS_ERR(mtd))
+		return NULL;
+
+	ret = mtd_read(mtd, be32_to_cpup(list), 6, &retlen, mac);
+	put_mtd_device(mtd);
+
+	if (of_property_read_u32(np, "mtd-mac-address-increment-byte", &inc_idx))
+		inc_idx = 5;
+	if (inc_idx > 5)
+		return NULL;
+
+	if (!of_property_read_u32(np, "mtd-mac-address-increment", &mac_inc))
+		mac[inc_idx] += mac_inc;
+
+	if (!is_valid_ether_addr(mac))
+		return NULL;
+
+	addr = of_get_mac_addr(np, "mac-address");
+	if (addr) {
+		memcpy(addr, mac, ETH_ALEN);
+		return addr;
+	}
+
+	prop = kzalloc(sizeof(*prop), GFP_KERNEL);
+	if (!prop)
+		return NULL;
+
+	prop->name = "mac-address";
+	prop->length = ETH_ALEN;
+	prop->value = kmemdup(mac, ETH_ALEN, GFP_KERNEL);
+	if (!prop->value || of_add_property(np, prop))
+		goto free;
+
+	return prop->value;
+free:
+	kfree(prop->value);
+	kfree(prop);
+#endif
+	return NULL;
+}
+
+/**
+ * Search the device tree for the best MAC address to use.  'mac-address' is
+ * checked first, because that is supposed to contain to "most recent" MAC
+ * address. If that isn't set, then 'local-mac-address' is checked next,
+ * because that is the default address.  If that isn't set, then the obsolete
+ * 'address' is checked, just in case we're using an old device tree.
+ *
+ * Note that the 'address' property is supposed to contain a virtual address of
+ * the register set, but some DTS files have redefined that property to be the
+ * MAC address.
+ *
+ * All-zero MAC addresses are rejected, because those could be properties that
+ * exist in the device tree, but were not set by U-Boot.  For example, the
+ * DTS could define 'mac-address' and 'local-mac-address', with zero MAC
+ * addresses.  Some older U-Boots only initialized 'local-mac-address'.  In
+ * this case, the real MAC is in 'local-mac-address', and 'mac-address' exists
+ * but is all zeros.
+ *
+ * If a mtd-mac-address property exists, try to fetch the MAC address from the
+ * specified mtd device, and store it as a 'mac-address' property
+*/
+const void *of_get_mac_address(struct device_node *np)
+{
+	const void *addr;
+
+	addr = of_get_mac_address_mtd(np);
+	if (addr)
+		return addr;
+
+	addr = of_get_mac_addr(np, "mac-address");
+	if (addr)
+		return addr;
+
+	addr = of_get_mac_addr(np, "local-mac-address");
+	if (addr)
+		return addr;
+
+	return of_get_mac_addr(np, "address");
+}
+EXPORT_SYMBOL(of_get_mac_address);
+
+/**
+ * Obtain the MAC address from an nvmem provider named 'mac-address' through
+ * device tree.
+ * On success, copies the new address into memory pointed to by addr and
+ * returns 0. Returns a negative error code otherwise.
+ * @np:		Device tree node containing the nvmem-cells phandle
+ * @addr:	Pointer to receive the MAC address using ether_addr_copy()
+ */
+int of_get_nvmem_mac_address(struct device_node *np, void *addr)
+{
+	struct nvmem_cell *cell;
+	const void *mac;
+	size_t len;
+	int ret;
+
+	cell = of_nvmem_cell_get(np, "mac-address");
+	if (IS_ERR(cell))
+		return PTR_ERR(cell);
+
+	mac = nvmem_cell_read(cell, &len);
+
+	nvmem_cell_put(cell);
+
+	if (IS_ERR(mac))
+		return PTR_ERR(mac);
+
+	if (len < ETH_ALEN || !is_valid_ether_addr(mac)) {
+		ret = -EINVAL;
+	} else {
+		ether_addr_copy(addr, mac);
+		ret = 0;
+	}
+
+	kfree(mac);
+
+	return ret;
+}
+EXPORT_SYMBOL(of_get_nvmem_mac_address);