net: dsa: microchip: Add KSZ8895/KSZ8864 switch support

KSZ8895/KSZ8864 is a switch family between KSZ8863/73 and KSZ8795, so it
shares some registers and functions in those switches already
implemented in the KSZ DSA driver.

Signed-off-by: Tristram Ha <tristram.ha@microchip.com>
Tested-by: Pieter Van Trappen <pieter.van.trappen@cern.ch>
Reviewed-by: Oleksij Rempel <o.rempel@pengutronix.de>
Signed-off-by: Jakub Kicinski <kuba@kernel.org>

1 files changed, 128 insertions, 6 deletions

diff --git a/drivers/net/dsa/microchip/ksz_common.c b/drivers/net/dsa/microchip/ksz_common.c
index cd3991792b69..6609bf271ad0 100644
--- a/drivers/net/dsa/microchip/ksz_common.c
+++ b/drivers/net/dsa/microchip/ksz_common.c
@@ -2,7 +2,7 @@
 /*
  * Microchip switch driver main logic
  *
- * Copyright (C) 2017-2019 Microchip Technology Inc.
+ * Copyright (C) 2017-2024 Microchip Technology Inc.
  */
 
 #include <linux/delay.h>
@@ -277,7 +277,7 @@ static const struct phylink_mac_ops ksz8_phylink_mac_ops = {
 	.mac_link_up	= ksz8_phylink_mac_link_up,
 };
 
-static const struct ksz_dev_ops ksz88x3_dev_ops = {
+static const struct ksz_dev_ops ksz88xx_dev_ops = {
 	.setup = ksz8_setup,
 	.get_port_addr = ksz8_get_port_addr,
 	.cfg_port_member = ksz8_cfg_port_member,
@@ -572,6 +572,61 @@ static u8 ksz8863_shifts[] = {
 	[DYNAMIC_MAC_SRC_PORT]		= 20,
 };
 
+static const u16 ksz8895_regs[] = {
+	[REG_SW_MAC_ADDR]		= 0x68,
+	[REG_IND_CTRL_0]		= 0x6E,
+	[REG_IND_DATA_8]		= 0x70,
+	[REG_IND_DATA_CHECK]		= 0x72,
+	[REG_IND_DATA_HI]		= 0x71,
+	[REG_IND_DATA_LO]		= 0x75,
+	[REG_IND_MIB_CHECK]		= 0x75,
+	[P_FORCE_CTRL]			= 0x0C,
+	[P_LINK_STATUS]			= 0x0E,
+	[P_LOCAL_CTRL]			= 0x0C,
+	[P_NEG_RESTART_CTRL]		= 0x0D,
+	[P_REMOTE_STATUS]		= 0x0E,
+	[P_SPEED_STATUS]		= 0x09,
+	[S_TAIL_TAG_CTRL]		= 0x0C,
+	[P_STP_CTRL]			= 0x02,
+	[S_START_CTRL]			= 0x01,
+	[S_BROADCAST_CTRL]		= 0x06,
+	[S_MULTICAST_CTRL]		= 0x04,
+};
+
+static const u32 ksz8895_masks[] = {
+	[PORT_802_1P_REMAPPING]		= BIT(7),
+	[SW_TAIL_TAG_ENABLE]		= BIT(1),
+	[MIB_COUNTER_OVERFLOW]		= BIT(7),
+	[MIB_COUNTER_VALID]		= BIT(6),
+	[VLAN_TABLE_FID]		= GENMASK(6, 0),
+	[VLAN_TABLE_MEMBERSHIP]		= GENMASK(11, 7),
+	[VLAN_TABLE_VALID]		= BIT(12),
+	[STATIC_MAC_TABLE_VALID]	= BIT(21),
+	[STATIC_MAC_TABLE_USE_FID]	= BIT(23),
+	[STATIC_MAC_TABLE_FID]		= GENMASK(30, 24),
+	[STATIC_MAC_TABLE_OVERRIDE]	= BIT(22),
+	[STATIC_MAC_TABLE_FWD_PORTS]	= GENMASK(20, 16),
+	[DYNAMIC_MAC_TABLE_ENTRIES_H]	= GENMASK(6, 0),
+	[DYNAMIC_MAC_TABLE_MAC_EMPTY]	= BIT(7),
+	[DYNAMIC_MAC_TABLE_NOT_READY]	= BIT(7),
+	[DYNAMIC_MAC_TABLE_ENTRIES]	= GENMASK(31, 29),
+	[DYNAMIC_MAC_TABLE_FID]		= GENMASK(22, 16),
+	[DYNAMIC_MAC_TABLE_SRC_PORT]	= GENMASK(26, 24),
+	[DYNAMIC_MAC_TABLE_TIMESTAMP]	= GENMASK(28, 27),
+};
+
+static const u8 ksz8895_shifts[] = {
+	[VLAN_TABLE_MEMBERSHIP_S]	= 7,
+	[VLAN_TABLE]			= 13,
+	[STATIC_MAC_FWD_PORTS]		= 16,
+	[STATIC_MAC_FID]		= 24,
+	[DYNAMIC_MAC_ENTRIES_H]		= 3,
+	[DYNAMIC_MAC_ENTRIES]		= 29,
+	[DYNAMIC_MAC_FID]		= 16,
+	[DYNAMIC_MAC_TIMESTAMP]		= 27,
+	[DYNAMIC_MAC_SRC_PORT]		= 24,
+};
+
 static const u16 ksz9477_regs[] = {
 	[REG_SW_MAC_ADDR]		= 0x0302,
 	[P_STP_CTRL]			= 0x0B04,
@@ -1397,7 +1452,7 @@ const struct ksz_chip_data ksz_switch_chips[] = {
 		.port_cnt = 3,
 		.num_tx_queues = 4,
 		.num_ipms = 4,
-		.ops = &ksz88x3_dev_ops,
+		.ops = &ksz88xx_dev_ops,
 		.phylink_mac_ops = &ksz8830_phylink_mac_ops,
 		.mib_names = ksz88xx_mib_names,
 		.mib_cnt = ARRAY_SIZE(ksz88xx_mib_names),
@@ -1412,6 +1467,61 @@ const struct ksz_chip_data ksz_switch_chips[] = {
 		.rd_table = &ksz8873_register_set,
 	},
 
+	[KSZ8864] = {
+		/* WARNING
+		 * =======
+		 * KSZ8864 is similar to KSZ8895, except the first port
+		 * does not exist.
+		 *           external  cpu
+		 * KSZ8864   1,2,3      4
+		 * KSZ8895   0,1,2,3    4
+		 * port_cnt is configured as 5, even though it is 4
+		 */
+		.chip_id = KSZ8864_CHIP_ID,
+		.dev_name = "KSZ8864",
+		.num_vlans = 4096,
+		.num_alus = 0,
+		.num_statics = 32,
+		.cpu_ports = 0x10,	/* can be configured as cpu port */
+		.port_cnt = 5,		/* total cpu and user ports */
+		.num_tx_queues = 4,
+		.num_ipms = 4,
+		.ops = &ksz88xx_dev_ops,
+		.phylink_mac_ops = &ksz8830_phylink_mac_ops,
+		.mib_names = ksz88xx_mib_names,
+		.mib_cnt = ARRAY_SIZE(ksz88xx_mib_names),
+		.reg_mib_cnt = MIB_COUNTER_NUM,
+		.regs = ksz8895_regs,
+		.masks = ksz8895_masks,
+		.shifts = ksz8895_shifts,
+		.supports_mii = {false, false, false, false, true},
+		.supports_rmii = {false, false, false, false, true},
+		.internal_phy = {false, true, true, true, false},
+	},
+
+	[KSZ8895] = {
+		.chip_id = KSZ8895_CHIP_ID,
+		.dev_name = "KSZ8895",
+		.num_vlans = 4096,
+		.num_alus = 0,
+		.num_statics = 32,
+		.cpu_ports = 0x10,	/* can be configured as cpu port */
+		.port_cnt = 5,		/* total cpu and user ports */
+		.num_tx_queues = 4,
+		.num_ipms = 4,
+		.ops = &ksz88xx_dev_ops,
+		.phylink_mac_ops = &ksz8830_phylink_mac_ops,
+		.mib_names = ksz88xx_mib_names,
+		.mib_cnt = ARRAY_SIZE(ksz88xx_mib_names),
+		.reg_mib_cnt = MIB_COUNTER_NUM,
+		.regs = ksz8895_regs,
+		.masks = ksz8895_masks,
+		.shifts = ksz8895_shifts,
+		.supports_mii = {false, false, false, false, true},
+		.supports_rmii = {false, false, false, false, true},
+		.internal_phy = {true, true, true, true, false},
+	},
+
 	[KSZ9477] = {
 		.chip_id = KSZ9477_CHIP_ID,
 		.dev_name = "KSZ9477",
@@ -2937,9 +3047,7 @@ static enum dsa_tag_protocol ksz_get_tag_protocol(struct dsa_switch *ds,
 	struct ksz_device *dev = ds->priv;
 	enum dsa_tag_protocol proto = DSA_TAG_PROTO_NONE;
 
-	if (dev->chip_id == KSZ8795_CHIP_ID ||
-	    dev->chip_id == KSZ8794_CHIP_ID ||
-	    dev->chip_id == KSZ8765_CHIP_ID)
+	if (ksz_is_ksz87xx(dev) || ksz_is_8895_family(dev))
 		proto = DSA_TAG_PROTO_KSZ8795;
 
 	if (dev->chip_id == KSZ8830_CHIP_ID ||
@@ -3055,6 +3163,8 @@ static int ksz_max_mtu(struct dsa_switch *ds, int port)
 	case KSZ8765_CHIP_ID:
 		return KSZ8795_HUGE_PACKET_SIZE - VLAN_ETH_HLEN - ETH_FCS_LEN;
 	case KSZ8830_CHIP_ID:
+	case KSZ8864_CHIP_ID:
+	case KSZ8895_CHIP_ID:
 		return KSZ8863_HUGE_PACKET_SIZE - VLAN_ETH_HLEN - ETH_FCS_LEN;
 	case KSZ8563_CHIP_ID:
 	case KSZ8567_CHIP_ID:
@@ -3412,6 +3522,18 @@ static int ksz_switch_detect(struct ksz_device *dev)
 		else
 			return -ENODEV;
 		break;
+	case KSZ8895_FAMILY_ID:
+		if (id2 == KSZ8895_CHIP_ID_95 ||
+		    id2 == KSZ8895_CHIP_ID_95R)
+			dev->chip_id = KSZ8895_CHIP_ID;
+		else
+			return -ENODEV;
+		ret = ksz_read8(dev, REG_KSZ8864_CHIP_ID, &id4);
+		if (ret)
+			return ret;
+		if (id4 & SW_KSZ8864)
+			dev->chip_id = KSZ8864_CHIP_ID;
+		break;
 	default:
 		ret = ksz_read32(dev, REG_CHIP_ID0, &id32);
 		if (ret)