net: dsa: microchip: generic access to ksz9477 static and reserved table

The ksz9477 and lan937x has few difference in the static and reserved
table register 0x041C. For the ksz9477 if the bit 0 is 1 - read
operation and 0 - write operation. But for lan937x bit 1:0 used for
selecting the read/write operation, 01 - write and 10 - read.
To use ksz9477 mdb add/del and enable_stp_addr for the lan937x, masks &
shifts are introduced for ksz9477 & lan937x in ksz_common.c. Then
updated the function with masks & shifts based on the switch instead of
hard coding it.
Signed-off-by: Arun Ramadoss <arun.ramadoss@microchip.com>
Signed-off-by: David S. Miller <davem@davemloft.net>

drivers/net/dsa/microchip/ksz9477.c

@@ -644,11 +644,16 @@ int ksz9477_mdb_add(struct ksz_device *dev, int port,
 		    const struct switchdev_obj_port_mdb *mdb, struct dsa_db db)
 {
 	u32 static_table[4];
+	const u8 *shifts;
+	const u32 *masks;
 	u32 data;
 	int index;
 	u32 mac_hi, mac_lo;
 	int err = 0;
 
+	shifts = dev->info->shifts;
+	masks = dev->info->masks;
+
 	mac_hi = ((mdb->addr[0] << 8) | mdb->addr[1]);
 	mac_lo = ((mdb->addr[2] << 24) | (mdb->addr[3] << 16));
 	mac_lo |= ((mdb->addr[4] << 8) | mdb->addr[5]);
@@ -657,8 +662,8 @@ int ksz9477_mdb_add(struct ksz_device *dev, int port,
 
 	for (index = 0; index < dev->info->num_statics; index++) {
 		/* find empty slot first */
-		data = (index << ALU_STAT_INDEX_S) |
-			ALU_STAT_READ | ALU_STAT_START;
+		data = (index << shifts[ALU_STAT_INDEX]) |
+			masks[ALU_STAT_READ] | ALU_STAT_START;
 		ksz_write32(dev, REG_SW_ALU_STAT_CTRL__4, data);
 
 		/* wait to be finished */
@@ -702,7 +707,7 @@ int ksz9477_mdb_add(struct ksz_device *dev, int port,
 
 	ksz9477_write_table(dev, static_table);
 
-	data = (index << ALU_STAT_INDEX_S) | ALU_STAT_START;
+	data = (index << shifts[ALU_STAT_INDEX]) | ALU_STAT_START;
 	ksz_write32(dev, REG_SW_ALU_STAT_CTRL__4, data);
 
 	/* wait to be finished */
@@ -718,11 +723,16 @@ int ksz9477_mdb_del(struct ksz_device *dev, int port,
 		    const struct switchdev_obj_port_mdb *mdb, struct dsa_db db)
 {
 	u32 static_table[4];
+	const u8 *shifts;
+	const u32 *masks;
 	u32 data;
 	int index;
 	int ret = 0;
 	u32 mac_hi, mac_lo;
 
+	shifts = dev->info->shifts;
+	masks = dev->info->masks;
+
 	mac_hi = ((mdb->addr[0] << 8) | mdb->addr[1]);
 	mac_lo = ((mdb->addr[2] << 24) | (mdb->addr[3] << 16));
 	mac_lo |= ((mdb->addr[4] << 8) | mdb->addr[5]);
@@ -731,8 +741,8 @@ int ksz9477_mdb_del(struct ksz_device *dev, int port,
 
 	for (index = 0; index < dev->info->num_statics; index++) {
 		/* find empty slot first */
-		data = (index << ALU_STAT_INDEX_S) |
-			ALU_STAT_READ | ALU_STAT_START;
+		data = (index << shifts[ALU_STAT_INDEX]) |
+			masks[ALU_STAT_READ] | ALU_STAT_START;
 		ksz_write32(dev, REG_SW_ALU_STAT_CTRL__4, data);
 
 		/* wait to be finished */
@@ -774,7 +784,7 @@ int ksz9477_mdb_del(struct ksz_device *dev, int port,
 
 	ksz9477_write_table(dev, static_table);
 
-	data = (index << ALU_STAT_INDEX_S) | ALU_STAT_START;
+	data = (index << shifts[ALU_STAT_INDEX]) | ALU_STAT_START;
 	ksz_write32(dev, REG_SW_ALU_STAT_CTRL__4, data);
 
 	/* wait to be finished */
@@ -1230,9 +1240,12 @@ void ksz9477_config_cpu_port(struct dsa_switch *ds)
 
 int ksz9477_enable_stp_addr(struct ksz_device *dev)
 {
+	const u32 *masks;
 	u32 data;
 	int ret;
 
+	masks = dev->info->masks;
+
 	/* Enable Reserved multicast table */
 	ksz_cfg(dev, REG_SW_LUE_CTRL_0, SW_RESV_MCAST_ENABLE, true);
 
@@ -1242,7 +1255,7 @@ int ksz9477_enable_stp_addr(struct ksz_device *dev)
 	if (ret < 0)
 		return ret;
 
-	data = ALU_STAT_START | ALU_RESV_MCAST_ADDR;
+	data = ALU_STAT_START | ALU_RESV_MCAST_ADDR | masks[ALU_STAT_WRITE];
 
 	ret = ksz_write32(dev, REG_SW_ALU_STAT_CTRL__4, data);
 	if (ret < 0)

drivers/net/dsa/microchip/ksz9477_reg.h

@@ -419,12 +419,9 @@
 
 #define REG_SW_ALU_STAT_CTRL__4		0x041C
 
-#define ALU_STAT_INDEX_M		(BIT(4) - 1)
-#define ALU_STAT_INDEX_S		16
 #define ALU_RESV_MCAST_INDEX_M		(BIT(6) - 1)
 #define ALU_STAT_START			BIT(7)
 #define ALU_RESV_MCAST_ADDR		BIT(1)
-#define ALU_STAT_READ			BIT(0)
 
 #define REG_SW_ALU_VAL_A		0x0420
 

drivers/net/dsa/microchip/ksz_common.c

@@ -314,7 +314,24 @@ static const u16 ksz9477_regs[] = {
 	[S_START_CTRL]			= 0x0300,
 	[S_BROADCAST_CTRL]		= 0x0332,
 	[S_MULTICAST_CTRL]		= 0x0331,
+};
+
+static const u32 ksz9477_masks[] = {
+	[ALU_STAT_WRITE]		= 0,
+	[ALU_STAT_READ]			= 1,
+};
+
+static const u8 ksz9477_shifts[] = {
+	[ALU_STAT_INDEX]		= 16,
+};
+
+static const u32 lan937x_masks[] = {
+	[ALU_STAT_WRITE]		= 1,
+	[ALU_STAT_READ]			= 2,
+};
 
+static const u8 lan937x_shifts[] = {
+	[ALU_STAT_INDEX]		= 8,
 };
 
 const struct ksz_chip_data ksz_switch_chips[] = {
@@ -432,6 +449,8 @@ const struct ksz_chip_data ksz_switch_chips[] = {
 		.mib_cnt = ARRAY_SIZE(ksz9477_mib_names),
 		.reg_mib_cnt = MIB_COUNTER_NUM,
 		.regs = ksz9477_regs,
+		.masks = ksz9477_masks,
+		.shifts = ksz9477_shifts,
 		.supports_mii	= {false, false, false, false,
 				   false, true, false},
 		.supports_rmii	= {false, false, false, false,
@@ -456,6 +475,8 @@ const struct ksz_chip_data ksz_switch_chips[] = {
 		.mib_cnt = ARRAY_SIZE(ksz9477_mib_names),
 		.reg_mib_cnt = MIB_COUNTER_NUM,
 		.regs = ksz9477_regs,
+		.masks = ksz9477_masks,
+		.shifts = ksz9477_shifts,
 		.supports_mii	= {false, false, false, false,
 				   false, true, true},
 		.supports_rmii	= {false, false, false, false,
@@ -479,6 +500,8 @@ const struct ksz_chip_data ksz_switch_chips[] = {
 		.mib_cnt = ARRAY_SIZE(ksz9477_mib_names),
 		.reg_mib_cnt = MIB_COUNTER_NUM,
 		.regs = ksz9477_regs,
+		.masks = ksz9477_masks,
+		.shifts = ksz9477_shifts,
 		.supports_mii = {false, false, true},
 		.supports_rmii = {false, false, true},
 		.supports_rgmii = {false, false, true},
@@ -499,6 +522,8 @@ const struct ksz_chip_data ksz_switch_chips[] = {
 		.mib_cnt = ARRAY_SIZE(ksz9477_mib_names),
 		.reg_mib_cnt = MIB_COUNTER_NUM,
 		.regs = ksz9477_regs,
+		.masks = ksz9477_masks,
+		.shifts = ksz9477_shifts,
 		.supports_mii	= {false, false, false, false,
 				   false, true, true},
 		.supports_rmii	= {false, false, false, false,
@@ -521,6 +546,8 @@ const struct ksz_chip_data ksz_switch_chips[] = {
 		.mib_cnt = ARRAY_SIZE(ksz9477_mib_names),
 		.reg_mib_cnt = MIB_COUNTER_NUM,
 		.regs = ksz9477_regs,
+		.masks = lan937x_masks,
+		.shifts = lan937x_shifts,
 		.supports_mii = {false, false, false, false, true},
 		.supports_rmii = {false, false, false, false, true},
 		.supports_rgmii = {false, false, false, false, true},
@@ -539,6 +566,8 @@ const struct ksz_chip_data ksz_switch_chips[] = {
 		.mib_cnt = ARRAY_SIZE(ksz9477_mib_names),
 		.reg_mib_cnt = MIB_COUNTER_NUM,
 		.regs = ksz9477_regs,
+		.masks = lan937x_masks,
+		.shifts = lan937x_shifts,
 		.supports_mii = {false, false, false, false, true, true},
 		.supports_rmii = {false, false, false, false, true, true},
 		.supports_rgmii = {false, false, false, false, true, true},
@@ -557,6 +586,8 @@ const struct ksz_chip_data ksz_switch_chips[] = {
 		.mib_cnt = ARRAY_SIZE(ksz9477_mib_names),
 		.reg_mib_cnt = MIB_COUNTER_NUM,
 		.regs = ksz9477_regs,
+		.masks = lan937x_masks,
+		.shifts = lan937x_shifts,
 		.supports_mii	= {false, false, false, false,
 				   true, true, false, false},
 		.supports_rmii	= {false, false, false, false,
@@ -579,6 +610,8 @@ const struct ksz_chip_data ksz_switch_chips[] = {
 		.mib_cnt = ARRAY_SIZE(ksz9477_mib_names),
 		.reg_mib_cnt = MIB_COUNTER_NUM,
 		.regs = ksz9477_regs,
+		.masks = lan937x_masks,
+		.shifts = lan937x_shifts,
 		.supports_mii	= {false, false, false, false,
 				   true, true, false, false},
 		.supports_rmii	= {false, false, false, false,
@@ -601,6 +634,8 @@ const struct ksz_chip_data ksz_switch_chips[] = {
 		.mib_cnt = ARRAY_SIZE(ksz9477_mib_names),
 		.reg_mib_cnt = MIB_COUNTER_NUM,
 		.regs = ksz9477_regs,
+		.masks = lan937x_masks,
+		.shifts = lan937x_shifts,
 		.supports_mii	= {false, false, false, false,
 				   true, true, false, false},
 		.supports_rmii	= {false, false, false, false,

drivers/net/dsa/microchip/ksz_common.h

@@ -191,6 +191,8 @@ enum ksz_masks {
 	DYNAMIC_MAC_TABLE_FID,
 	DYNAMIC_MAC_TABLE_SRC_PORT,
 	DYNAMIC_MAC_TABLE_TIMESTAMP,
+	ALU_STAT_WRITE,
+	ALU_STAT_READ,
 };
 
 enum ksz_shifts {
@@ -203,6 +205,7 @@ enum ksz_shifts {
 	DYNAMIC_MAC_FID,
 	DYNAMIC_MAC_TIMESTAMP,
 	DYNAMIC_MAC_SRC_PORT,
+	ALU_STAT_INDEX,
 };
 
 struct alu_struct {