net: dsa: mv88e6xxx: factorize MAC address setting

Some switch models have a dedicated register for Switch MAC/WoF/WoL.
This register, when present, is used to indirectly set the switch MAC
address, instead of a direct write to 3 global registers.

Identify this feature and share a common mv88e6xxx_set_addr function.
Signed-off-by: Vivien Didelot <vivien.didelot@savoirfairelinux.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/dsa/mv88e6123.c

@@ -114,7 +114,7 @@ struct dsa_switch_driver mv88e6123_switch_driver = {
 	.tag_protocol		= DSA_TAG_PROTO_EDSA,
 	.probe			= mv88e6123_drv_probe,
 	.setup			= mv88e6123_setup,
-	.set_addr		= mv88e6xxx_set_addr_indirect,
+	.set_addr		= mv88e6xxx_set_addr,
 	.phy_read		= mv88e6xxx_phy_read,
 	.phy_write		= mv88e6xxx_phy_write,
 	.get_strings		= mv88e6xxx_get_strings,

drivers/net/dsa/mv88e6131.c

@@ -147,7 +147,7 @@ struct dsa_switch_driver mv88e6131_switch_driver = {
 	.tag_protocol		= DSA_TAG_PROTO_DSA,
 	.probe			= mv88e6131_drv_probe,
 	.setup			= mv88e6131_setup,
-	.set_addr		= mv88e6xxx_set_addr_direct,
+	.set_addr		= mv88e6xxx_set_addr,
 	.phy_read		= mv88e6xxx_phy_read,
 	.phy_write		= mv88e6xxx_phy_write,
 	.get_strings		= mv88e6xxx_get_strings,

drivers/net/dsa/mv88e6171.c

@@ -123,7 +123,7 @@ struct dsa_switch_driver mv88e6171_switch_driver = {
 	.tag_protocol		= DSA_TAG_PROTO_EDSA,
 	.probe			= mv88e6171_drv_probe,
 	.setup			= mv88e6171_setup,
-	.set_addr		= mv88e6xxx_set_addr_indirect,
+	.set_addr		= mv88e6xxx_set_addr,
 	.phy_read		= mv88e6xxx_phy_read,
 	.phy_write		= mv88e6xxx_phy_write,
 	.get_strings		= mv88e6xxx_get_strings,

drivers/net/dsa/mv88e6352.c

@@ -140,7 +140,7 @@ struct dsa_switch_driver mv88e6352_switch_driver = {
 	.tag_protocol		= DSA_TAG_PROTO_EDSA,
 	.probe			= mv88e6352_drv_probe,
 	.setup			= mv88e6352_setup,
-	.set_addr		= mv88e6xxx_set_addr_indirect,
+	.set_addr		= mv88e6xxx_set_addr,
 	.phy_read		= mv88e6xxx_phy_read,
 	.phy_write		= mv88e6xxx_phy_write,
 	.get_strings		= mv88e6xxx_get_strings,

drivers/net/dsa/mv88e6xxx.c

@@ -173,7 +173,7 @@ int mv88e6xxx_reg_write(struct mv88e6xxx_priv_state *ps, int addr,
 	return ret;
 }
 
-int mv88e6xxx_set_addr_direct(struct dsa_switch *ds, u8 *addr)
+static int mv88e6xxx_set_addr_direct(struct dsa_switch *ds, u8 *addr)
 {
 	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
 	int err;
@@ -192,7 +192,7 @@ int mv88e6xxx_set_addr_direct(struct dsa_switch *ds, u8 *addr)
 				   (addr[4] << 8) | addr[5]);
 }
 
-int mv88e6xxx_set_addr_indirect(struct dsa_switch *ds, u8 *addr)
+static int mv88e6xxx_set_addr_indirect(struct dsa_switch *ds, u8 *addr)
 {
 	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
 	int ret;
@@ -225,6 +225,16 @@ int mv88e6xxx_set_addr_indirect(struct dsa_switch *ds, u8 *addr)
 	return 0;
 }
 
+int mv88e6xxx_set_addr(struct dsa_switch *ds, u8 *addr)
+{
+	struct mv88e6xxx_priv_state *ps = ds_to_priv(ds);
+
+	if (mv88e6xxx_has(ps, MV88E6XXX_FLAG_SWITCH_MAC))
+		return mv88e6xxx_set_addr_indirect(ds, addr);
+	else
+		return mv88e6xxx_set_addr_direct(ds, addr);
+}
+
 static int _mv88e6xxx_phy_read(struct mv88e6xxx_priv_state *ps, int addr,
 			       int regnum)
 {

drivers/net/dsa/mv88e6xxx.h

@@ -367,6 +367,13 @@ enum mv88e6xxx_cap {
 	 */
 	MV88E6XXX_CAP_SMI_PHY,
 
+	/* Switch MAC/WoL/WoF register.
+	 * This requires an indirect access to set the switch MAC address
+	 * through GLOBAL2_SWITCH_MAC, otherwise GLOBAL_MAC_01, GLOBAL_MAC_23,
+	 * and GLOBAL_MAC_45 are used with a direct access.
+	 */
+	MV88E6XXX_CAP_SWITCH_MAC_WOL_WOF,
+
 	/* Internal temperature sensor.
 	 * Available from any enabled port's PHY register 26, page 6.
 	 */
@@ -378,6 +385,7 @@ enum mv88e6xxx_cap {
 #define MV88E6XXX_FLAG_EEPROM		BIT(MV88E6XXX_CAP_EEPROM)
 #define MV88E6XXX_FLAG_PPU		BIT(MV88E6XXX_CAP_PPU)
 #define MV88E6XXX_FLAG_SMI_PHY		BIT(MV88E6XXX_CAP_SMI_PHY)
+#define MV88E6XXX_FLAG_SWITCH_MAC	BIT(MV88E6XXX_CAP_SWITCH_MAC_WOL_WOF)
 #define MV88E6XXX_FLAG_TEMP		BIT(MV88E6XXX_CAP_TEMP)
 #define MV88E6XXX_FLAG_TEMP_LIMIT	BIT(MV88E6XXX_CAP_TEMP_LIMIT)
 
@@ -388,7 +396,8 @@ enum mv88e6xxx_cap {
 	MV88E6XXX_FLAG_PPU
 
 #define MV88E6XXX_FLAGS_FAMILY_6165	\
-	MV88E6XXX_FLAG_TEMP
+	(MV88E6XXX_FLAG_SWITCH_MAC |	\
+	 MV88E6XXX_FLAG_TEMP)
 
 #define MV88E6XXX_FLAGS_FAMILY_6185	\
 	MV88E6XXX_FLAG_PPU
@@ -396,16 +405,19 @@ enum mv88e6xxx_cap {
 #define MV88E6XXX_FLAGS_FAMILY_6320	\
 	(MV88E6XXX_FLAG_EEPROM |	\
 	 MV88E6XXX_FLAG_SMI_PHY |	\
+	 MV88E6XXX_FLAG_SWITCH_MAC |	\
 	 MV88E6XXX_FLAG_TEMP |		\
 	 MV88E6XXX_FLAG_TEMP_LIMIT)
 
 #define MV88E6XXX_FLAGS_FAMILY_6351	\
 	(MV88E6XXX_FLAG_SMI_PHY |	\
+	 MV88E6XXX_FLAG_SWITCH_MAC |	\
 	 MV88E6XXX_FLAG_TEMP)
 
 #define MV88E6XXX_FLAGS_FAMILY_6352	\
 	(MV88E6XXX_FLAG_EEPROM |	\
 	 MV88E6XXX_FLAG_SMI_PHY	|	\
+	 MV88E6XXX_FLAG_SWITCH_MAC |	\
 	 MV88E6XXX_FLAG_TEMP |		\
 	 MV88E6XXX_FLAG_TEMP_LIMIT)
 
@@ -525,8 +537,7 @@ int mv88e6xxx_setup_global(struct dsa_switch *ds);
 int mv88e6xxx_reg_read(struct mv88e6xxx_priv_state *ps, int addr, int reg);
 int mv88e6xxx_reg_write(struct mv88e6xxx_priv_state *ps, int addr,
 			int reg, u16 val);
-int mv88e6xxx_set_addr_direct(struct dsa_switch *ds, u8 *addr);
-int mv88e6xxx_set_addr_indirect(struct dsa_switch *ds, u8 *addr);
+int mv88e6xxx_set_addr(struct dsa_switch *ds, u8 *addr);
 int mv88e6xxx_phy_read(struct dsa_switch *ds, int port, int regnum);
 int mv88e6xxx_phy_write(struct dsa_switch *ds, int port, int regnum, u16 val);
 void mv88e6xxx_get_strings(struct dsa_switch *ds, int port, uint8_t *data);