1 files changed, 93 insertions, 0 deletions
diff --git a/drivers/net/ethernet/ti/cpsw-common.c b/drivers/net/ethernet/ti/cpsw-common.c
new file mode 100644
index 0000000000..26dc906eae
--- /dev/null
+++ b/drivers/net/ethernet/ti/cpsw-common.c
@@ -0,0 +1,93 @@
+// SPDX-License-Identifier: GPL-2.0+
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/of.h>
+#include <linux/regmap.h>
+#include <linux/mfd/syscon.h>
+
+#include "cpsw.h"
+
+#define CTRL_MAC_LO_REG(offset, id) ((offset) + 0x8 * (id))
+#define CTRL_MAC_HI_REG(offset, id) ((offset) + 0x8 * (id) + 0x4)
+
+static int davinci_emac_3517_get_macid(struct device *dev, u16 offset,
+				       int slave, u8 *mac_addr)
+{
+	u32 macid_lsb;
+	u32 macid_msb;
+	struct regmap *syscon;
+
+	syscon = syscon_regmap_lookup_by_phandle(dev->of_node, "syscon");
+	if (IS_ERR(syscon)) {
+		if (PTR_ERR(syscon) == -ENODEV)
+			return 0;
+		return PTR_ERR(syscon);
+	}
+
+	regmap_read(syscon, CTRL_MAC_LO_REG(offset, slave), &macid_lsb);
+	regmap_read(syscon, CTRL_MAC_HI_REG(offset, slave), &macid_msb);
+
+	mac_addr[0] = (macid_msb >> 16) & 0xff;
+	mac_addr[1] = (macid_msb >> 8)  & 0xff;
+	mac_addr[2] = macid_msb & 0xff;
+	mac_addr[3] = (macid_lsb >> 16) & 0xff;
+	mac_addr[4] = (macid_lsb >> 8)  & 0xff;
+	mac_addr[5] = macid_lsb & 0xff;
+
+	return 0;
+}
+
+static int cpsw_am33xx_cm_get_macid(struct device *dev, u16 offset, int slave,
+				    u8 *mac_addr)
+{
+	u32 macid_lo;
+	u32 macid_hi;
+	struct regmap *syscon;
+
+	syscon = syscon_regmap_lookup_by_phandle(dev->of_node, "syscon");
+	if (IS_ERR(syscon)) {
+		if (PTR_ERR(syscon) == -ENODEV)
+			return 0;
+		return PTR_ERR(syscon);
+	}
+
+	regmap_read(syscon, CTRL_MAC_LO_REG(offset, slave), &macid_lo);
+	regmap_read(syscon, CTRL_MAC_HI_REG(offset, slave), &macid_hi);
+
+	mac_addr[5] = (macid_lo >> 8) & 0xff;
+	mac_addr[4] = macid_lo & 0xff;
+	mac_addr[3] = (macid_hi >> 24) & 0xff;
+	mac_addr[2] = (macid_hi >> 16) & 0xff;
+	mac_addr[1] = (macid_hi >> 8) & 0xff;
+	mac_addr[0] = macid_hi & 0xff;
+
+	return 0;
+}
+
+int ti_cm_get_macid(struct device *dev, int slave, u8 *mac_addr)
+{
+	if (of_machine_is_compatible("ti,dm8148"))
+		return cpsw_am33xx_cm_get_macid(dev, 0x630, slave, mac_addr);
+
+	if (of_machine_is_compatible("ti,am33xx"))
+		return cpsw_am33xx_cm_get_macid(dev, 0x630, slave, mac_addr);
+
+	if (of_device_is_compatible(dev->of_node, "ti,am3517-emac"))
+		return davinci_emac_3517_get_macid(dev, 0x110, slave, mac_addr);
+
+	if (of_device_is_compatible(dev->of_node, "ti,dm816-emac"))
+		return cpsw_am33xx_cm_get_macid(dev, 0x30, slave, mac_addr);
+
+	if (of_machine_is_compatible("ti,am43"))
+		return cpsw_am33xx_cm_get_macid(dev, 0x630, slave, mac_addr);
+
+	if (of_machine_is_compatible("ti,dra7"))
+		return davinci_emac_3517_get_macid(dev, 0x514, slave, mac_addr);
+
+	dev_info(dev, "incompatible machine/device type for reading mac address\n");
+	return -ENOENT;
+}
+EXPORT_SYMBOL_GPL(ti_cm_get_macid);
+
+MODULE_LICENSE("GPL");