Merge branch 'net-dsa-microchip-ksz8795-add-wake-on-lan-support'

Pieter Van Trappen says:

====================
net: dsa: microchip: ksz8795: add Wake on LAN support

Add WoL support for KSZ8795 family of switches. This code was tested
with a KSZ8794 chip.

Strongly based on existing KSZ9477 code which has now been moved to
ksz_common instead of duplicating, as proposed during the review of
the v1 version of this patch.

In addition to the device-tree addition and the actual code, there's
two additional patches that fix some bugs found when further testing
DSA with this KSZ8794 chip.

v5: https://lore.kernel.org/20240812153015.653044-1-vtpieter@gmail.com
v4: https://lore.kernel.org/20240812084945.578993-1-vtpieter@gmail.com
v3: https://lore.kernel.org/20240806132606.1438953-1-vtpieter@gmail.com
v2: https://lore.kernel.org/20240731103403.407818-1-vtpieter@gmail.com
v1: https://lore.kernel.org/20240717193725.469192-1-vtpieter@gmail.com
====================

Link: https://patch.msgid.link/20240813142750.772781-1-vtpieter@gmail.comSigned-off-by: Jakub Kicinski <kuba@kernel.org>

Documentation/devicetree/bindings/net/dsa/microchip,ksz.yaml

@@ -51,6 +51,11 @@ properties:
       Set if the output SYNCLKO clock should be disabled. Do not mix with
       microchip,synclko-125.
 
+  microchip,pme-active-high:
+    $ref: /schemas/types.yaml#/definitions/flag
+    description:
+      Indicates if the PME pin polarity is active-high.
+
   microchip,io-drive-strength-microamp:
     description:
       IO Pad Drive Strength

drivers/net/dsa/microchip/ksz8.h

@@ -54,6 +54,9 @@ int ksz8_reset_switch(struct ksz_device *dev);
 int ksz8_switch_init(struct ksz_device *dev);
 void ksz8_switch_exit(struct ksz_device *dev);
 int ksz8_change_mtu(struct ksz_device *dev, int port, int mtu);
+int ksz8_pme_write8(struct ksz_device *dev, u32 reg, u8 value);
+int ksz8_pme_pread8(struct ksz_device *dev, int port, int offset, u8 *data);
+int ksz8_pme_pwrite8(struct ksz_device *dev, int port, int offset, u8 data);
 void ksz8_phylink_mac_link_up(struct phylink_config *config,
 			      struct phy_device *phydev, unsigned int mode,
 			      phy_interface_t interface, int speed, int duplex,

drivers/net/dsa/microchip/ksz8795.c

@@ -38,6 +38,20 @@ static void ksz_port_cfg(struct ksz_device *dev, int port, int offset, u8 bits,
 			   bits, set ? bits : 0);
 }
 
+/**
+ * ksz8_ind_write8 - EEE/ACL/PME indirect register write
+ * @dev: The device structure.
+ * @table: Function & table select, register 110.
+ * @addr: Indirect access control, register 111.
+ * @data: The data to be written.
+ *
+ * This function performs an indirect register write for EEE, ACL or
+ * PME switch functionalities. Both 8-bit registers 110 and 111 are
+ * written at once with ksz_write16, using the serial multiple write
+ * functionality.
+ *
+ * Return: 0 on success, or an error code on failure.
+ */
 static int ksz8_ind_write8(struct ksz_device *dev, u8 table, u16 addr, u8 data)
 {
 	const u16 *regs;
@@ -58,6 +72,59 @@ static int ksz8_ind_write8(struct ksz_device *dev, u8 table, u16 addr, u8 data)
 	return ret;
 }
 
+/**
+ * ksz8_ind_read8 - EEE/ACL/PME indirect register read
+ * @dev: The device structure.
+ * @table: Function & table select, register 110.
+ * @addr: Indirect access control, register 111.
+ * @val: The value read.
+ *
+ * This function performs an indirect register read for EEE, ACL or
+ * PME switch functionalities. Both 8-bit registers 110 and 111 are
+ * written at once with ksz_write16, using the serial multiple write
+ * functionality.
+ *
+ * Return: 0 on success, or an error code on failure.
+ */
+static int ksz8_ind_read8(struct ksz_device *dev, u8 table, u16 addr, u8 *val)
+{
+	const u16 *regs;
+	u16 ctrl_addr;
+	int ret = 0;
+
+	regs = dev->info->regs;
+
+	mutex_lock(&dev->alu_mutex);
+
+	ctrl_addr = IND_ACC_TABLE(table | TABLE_READ) | addr;
+	ret = ksz_write16(dev, regs[REG_IND_CTRL_0], ctrl_addr);
+	if (!ret)
+		ret = ksz_read8(dev, regs[REG_IND_BYTE], val);
+
+	mutex_unlock(&dev->alu_mutex);
+
+	return ret;
+}
+
+int ksz8_pme_write8(struct ksz_device *dev, u32 reg, u8 value)
+{
+	return ksz8_ind_write8(dev, (u8)(reg >> 8), (u8)(reg), value);
+}
+
+int ksz8_pme_pread8(struct ksz_device *dev, int port, int offset, u8 *data)
+{
+	u8 table = (u8)(offset >> 8 | (port + 1));
+
+	return ksz8_ind_read8(dev, table, (u8)(offset), data);
+}
+
+int ksz8_pme_pwrite8(struct ksz_device *dev, int port, int offset, u8 data)
+{
+	u8 table = (u8)(offset >> 8 | (port + 1));
+
+	return ksz8_ind_write8(dev, table, (u8)(offset), data);
+}
+
 int ksz8_reset_switch(struct ksz_device *dev)
 {
 	if (ksz_is_ksz88x3(dev)) {
@@ -1545,6 +1612,7 @@ static void ksz8795_cpu_interface_select(struct ksz_device *dev, int port)
 
 void ksz8_port_setup(struct ksz_device *dev, int port, bool cpu_port)
 {
+	const u16 *regs = dev->info->regs;
 	struct dsa_switch *ds = dev->ds;
 	const u32 *masks;
 	int queues;
@@ -1575,6 +1643,13 @@ void ksz8_port_setup(struct ksz_device *dev, int port, bool cpu_port)
 		member = BIT(dsa_upstream_port(ds, port));
 
 	ksz8_cfg_port_member(dev, port, member);
+
+	/* Disable all WoL options by default. Otherwise
+	 * ksz_switch_macaddr_get/put logic will not work properly.
+	 * CPU port 4 has no WoL functionality.
+	 */
+	if (ksz_is_ksz87xx(dev) && !cpu_port)
+		ksz8_pme_pwrite8(dev, port, regs[REG_PORT_PME_CTRL], 0);
 }
 
 static void ksz88x3_config_rmii_clk(struct ksz_device *dev)
@@ -1790,7 +1865,8 @@ int ksz8_enable_stp_addr(struct ksz_device *dev)
 int ksz8_setup(struct dsa_switch *ds)
 {
 	struct ksz_device *dev = ds->priv;
-	int i;
+	const u16 *regs = dev->info->regs;
+	int i, ret = 0;
 
 	ds->mtu_enforcement_ingress = true;
 
@@ -1829,7 +1905,21 @@ int ksz8_setup(struct dsa_switch *ds)
 	for (i = 0; i < (dev->info->num_vlans / 4); i++)
 		ksz8_r_vlan_entries(dev, i);
 
+	/* Make sure PME (WoL) is not enabled. If requested, it will
+	 * be enabled by ksz_wol_pre_shutdown(). Otherwise, some PMICs
+	 * do not like PME events changes before shutdown. PME only
+	 * available on KSZ87xx family.
+	 */
+	if (ksz_is_ksz87xx(dev)) {
+		ret = ksz8_pme_write8(dev, regs[REG_SW_PME_CTRL], 0);
+		if (!ret)
+			ret = ksz_rmw8(dev, REG_INT_ENABLE, INT_PME, 0);
+	}
+
+	if (!ret)
 		return ksz8_handle_global_errata(ds);
+	else
+		return ret;
 }
 
 void ksz8_get_caps(struct ksz_device *dev, int port,

drivers/net/dsa/microchip/ksz9477.c

@@ -56,187 +56,6 @@ int ksz9477_change_mtu(struct ksz_device *dev, int port, int mtu)
 				  REG_SW_MTU_MASK, frame_size);
 }
 
-/**
- * ksz9477_handle_wake_reason - Handle wake reason on a specified port.
- * @dev: The device structure.
- * @port: The port number.
- *
- * This function reads the PME (Power Management Event) status register of a
- * specified port to determine the wake reason. If there is no wake event, it
- * returns early. Otherwise, it logs the wake reason which could be due to a
- * "Magic Packet", "Link Up", or "Energy Detect" event. The PME status register
- * is then cleared to acknowledge the handling of the wake event.
- *
- * Return: 0 on success, or an error code on failure.
- */
-static int ksz9477_handle_wake_reason(struct ksz_device *dev, int port)
-{
-	u8 pme_status;
-	int ret;
-
-	ret = ksz_pread8(dev, port, REG_PORT_PME_STATUS, &pme_status);
-	if (ret)
-		return ret;
-
-	if (!pme_status)
-		return 0;
-
-	dev_dbg(dev->dev, "Wake event on port %d due to:%s%s%s\n", port,
-		pme_status & PME_WOL_MAGICPKT ? " \"Magic Packet\"" : "",
-		pme_status & PME_WOL_LINKUP ? " \"Link Up\"" : "",
-		pme_status & PME_WOL_ENERGY ? " \"Energy detect\"" : "");
-
-	return ksz_pwrite8(dev, port, REG_PORT_PME_STATUS, pme_status);
-}
-
-/**
- * ksz9477_get_wol - Get Wake-on-LAN settings for a specified port.
- * @dev: The device structure.
- * @port: The port number.
- * @wol: Pointer to ethtool Wake-on-LAN settings structure.
- *
- * This function checks the PME Pin Control Register to see if  PME Pin Output
- * Enable is set, indicating PME is enabled. If enabled, it sets the supported
- * and active WoL flags.
- */
-void ksz9477_get_wol(struct ksz_device *dev, int port,
-		     struct ethtool_wolinfo *wol)
-{
-	u8 pme_ctrl;
-	int ret;
-
-	if (!dev->wakeup_source)
-		return;
-
-	wol->supported = WAKE_PHY;
-
-	/* Check if the current MAC address on this port can be set
-	 * as global for WAKE_MAGIC support. The result may vary
-	 * dynamically based on other ports configurations.
-	 */
-	if (ksz_is_port_mac_global_usable(dev->ds, port))
-		wol->supported |= WAKE_MAGIC;
-
-	ret = ksz_pread8(dev, port, REG_PORT_PME_CTRL, &pme_ctrl);
-	if (ret)
-		return;
-
-	if (pme_ctrl & PME_WOL_MAGICPKT)
-		wol->wolopts |= WAKE_MAGIC;
-	if (pme_ctrl & (PME_WOL_LINKUP | PME_WOL_ENERGY))
-		wol->wolopts |= WAKE_PHY;
-}
-
-/**
- * ksz9477_set_wol - Set Wake-on-LAN settings for a specified port.
- * @dev: The device structure.
- * @port: The port number.
- * @wol: Pointer to ethtool Wake-on-LAN settings structure.
- *
- * This function configures Wake-on-LAN (WoL) settings for a specified port.
- * It validates the provided WoL options, checks if PME is enabled via the
- * switch's PME Pin Control Register, clears any previous wake reasons,
- * and sets the Magic Packet flag in the port's PME control register if
- * specified.
- *
- * Return: 0 on success, or other error codes on failure.
- */
-int ksz9477_set_wol(struct ksz_device *dev, int port,
-		    struct ethtool_wolinfo *wol)
-{
-	u8 pme_ctrl = 0, pme_ctrl_old = 0;
-	bool magic_switched_off;
-	bool magic_switched_on;
-	int ret;
-
-	if (wol->wolopts & ~(WAKE_PHY | WAKE_MAGIC))
-		return -EINVAL;
-
-	if (!dev->wakeup_source)
-		return -EOPNOTSUPP;
-
-	ret = ksz9477_handle_wake_reason(dev, port);
-	if (ret)
-		return ret;
-
-	if (wol->wolopts & WAKE_MAGIC)
-		pme_ctrl |= PME_WOL_MAGICPKT;
-	if (wol->wolopts & WAKE_PHY)
-		pme_ctrl |= PME_WOL_LINKUP | PME_WOL_ENERGY;
-
-	ret = ksz_pread8(dev, port, REG_PORT_PME_CTRL, &pme_ctrl_old);
-	if (ret)
-		return ret;
-
-	if (pme_ctrl_old == pme_ctrl)
-		return 0;
-
-	magic_switched_off = (pme_ctrl_old & PME_WOL_MAGICPKT) &&
-			    !(pme_ctrl & PME_WOL_MAGICPKT);
-	magic_switched_on = !(pme_ctrl_old & PME_WOL_MAGICPKT) &&
-			    (pme_ctrl & PME_WOL_MAGICPKT);
-
-	/* To keep reference count of MAC address, we should do this
-	 * operation only on change of WOL settings.
-	 */
-	if (magic_switched_on) {
-		ret = ksz_switch_macaddr_get(dev->ds, port, NULL);
-		if (ret)
-			return ret;
-	} else if (magic_switched_off) {
-		ksz_switch_macaddr_put(dev->ds);
-	}
-
-	ret = ksz_pwrite8(dev, port, REG_PORT_PME_CTRL, pme_ctrl);
-	if (ret) {
-		if (magic_switched_on)
-			ksz_switch_macaddr_put(dev->ds);
-		return ret;
-	}
-
-	return 0;
-}
-
-/**
- * ksz9477_wol_pre_shutdown - Prepares the switch device for shutdown while
- *                            considering Wake-on-LAN (WoL) settings.
- * @dev: The switch device structure.
- * @wol_enabled: Pointer to a boolean which will be set to true if WoL is
- *               enabled on any port.
- *
- * This function prepares the switch device for a safe shutdown while taking
- * into account the Wake-on-LAN (WoL) settings on the user ports. It updates
- * the wol_enabled flag accordingly to reflect whether WoL is active on any
- * port.
- */
-void ksz9477_wol_pre_shutdown(struct ksz_device *dev, bool *wol_enabled)
-{
-	struct dsa_port *dp;
-	int ret;
-
-	*wol_enabled = false;
-
-	if (!dev->wakeup_source)
-		return;
-
-	dsa_switch_for_each_user_port(dp, dev->ds) {
-		u8 pme_ctrl = 0;
-
-		ret = ksz_pread8(dev, dp->index, REG_PORT_PME_CTRL, &pme_ctrl);
-		if (!ret && pme_ctrl)
-			*wol_enabled = true;
-
-		/* make sure there are no pending wake events which would
-		 * prevent the device from going to sleep/shutdown.
-		 */
-		ksz9477_handle_wake_reason(dev, dp->index);
-	}
-
-	/* Now we are save to enable PME pin. */
-	if (*wol_enabled)
-		ksz_write8(dev, REG_SW_PME_CTRL, PME_ENABLE);
-}
-
 static int ksz9477_wait_vlan_ctrl_ready(struct ksz_device *dev)
 {
 	unsigned int val;
@@ -1204,6 +1023,7 @@ void ksz9477_port_queue_split(struct ksz_device *dev, int port)
 
 void ksz9477_port_setup(struct ksz_device *dev, int port, bool cpu_port)
 {
+	const u16 *regs = dev->info->regs;
 	struct dsa_switch *ds = dev->ds;
 	u16 data16;
 	u8 member;
@@ -1248,12 +1068,12 @@ void ksz9477_port_setup(struct ksz_device *dev, int port, bool cpu_port)
 	ksz9477_port_acl_init(dev, port);
 
 	/* clear pending wake flags */
-	ksz9477_handle_wake_reason(dev, port);
+	ksz_handle_wake_reason(dev, port);
 
 	/* Disable all WoL options by default. Otherwise
 	 * ksz_switch_macaddr_get/put logic will not work properly.
 	 */
-	ksz_pwrite8(dev, port, REG_PORT_PME_CTRL, 0);
+	ksz_pwrite8(dev, port, regs[REG_PORT_PME_CTRL], 0);
 }
 
 void ksz9477_config_cpu_port(struct dsa_switch *ds)
@@ -1350,6 +1170,7 @@ int ksz9477_enable_stp_addr(struct ksz_device *dev)
 int ksz9477_setup(struct dsa_switch *ds)
 {
 	struct ksz_device *dev = ds->priv;
+	const u16 *regs = dev->info->regs;
 	int ret = 0;
 
 	ds->mtu_enforcement_ingress = true;
@@ -1380,13 +1201,11 @@ int ksz9477_setup(struct dsa_switch *ds)
 	/* enable global MIB counter freeze function */
 	ksz_cfg(dev, REG_SW_MAC_CTRL_6, SW_MIB_COUNTER_FREEZE, true);
 
-	/* Make sure PME (WoL) is not enabled. If requested, it will be
-	 * enabled by ksz9477_wol_pre_shutdown(). Otherwise, some PMICs do not
-	 * like PME events changes before shutdown.
+	/* Make sure PME (WoL) is not enabled. If requested, it will
+	 * be enabled by ksz_wol_pre_shutdown(). Otherwise, some PMICs
+	 * do not like PME events changes before shutdown.
 	 */
-	ksz_write8(dev, REG_SW_PME_CTRL, 0);
-
-	return 0;
+	return ksz_write8(dev, regs[REG_SW_PME_CTRL], 0);
 }
 
 u32 ksz9477_get_port_addr(int port, int offset)

drivers/net/dsa/microchip/ksz9477.h

@@ -60,11 +60,6 @@ void ksz9477_switch_exit(struct ksz_device *dev);
 void ksz9477_port_queue_split(struct ksz_device *dev, int port);
 void ksz9477_hsr_join(struct dsa_switch *ds, int port, struct net_device *hsr);
 void ksz9477_hsr_leave(struct dsa_switch *ds, int port, struct net_device *hsr);
-void ksz9477_get_wol(struct ksz_device *dev, int port,
-		     struct ethtool_wolinfo *wol);
-int ksz9477_set_wol(struct ksz_device *dev, int port,
-		    struct ethtool_wolinfo *wol);
-void ksz9477_wol_pre_shutdown(struct ksz_device *dev, bool *wol_enabled);
 
 int ksz9477_port_acl_init(struct ksz_device *dev, int port);
 void ksz9477_port_acl_free(struct ksz_device *dev, int port);

drivers/net/dsa/microchip/ksz9477_reg.h

@@ -38,11 +38,6 @@
 #define SWITCH_REVISION_S		4
 #define SWITCH_RESET			0x01
 
-#define REG_SW_PME_CTRL			0x0006
-
-#define PME_ENABLE			BIT(1)
-#define PME_POLARITY			BIT(0)
-
 #define REG_GLOBAL_OPTIONS		0x000F
 
 #define SW_GIGABIT_ABLE			BIT(6)
@@ -807,13 +802,6 @@
 #define REG_PORT_AVB_SR_1_TYPE		0x0008
 #define REG_PORT_AVB_SR_2_TYPE		0x000A
 
-#define REG_PORT_PME_STATUS		0x0013
-#define REG_PORT_PME_CTRL		0x0017
-
-#define PME_WOL_MAGICPKT		BIT(2)
-#define PME_WOL_LINKUP			BIT(1)
-#define PME_WOL_ENERGY			BIT(0)
-
 #define REG_PORT_INT_STATUS		0x001B
 #define REG_PORT_INT_MASK		0x001F
 

drivers/net/dsa/microchip/ksz_common.c

@@ -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 ksz8_dev_ops = {
+static const struct ksz_dev_ops ksz88x3_dev_ops = {
 	.setup = ksz8_setup,
 	.get_port_addr = ksz8_get_port_addr,
 	.cfg_port_member = ksz8_cfg_port_member,
@@ -307,6 +307,44 @@ static const struct ksz_dev_ops ksz8_dev_ops = {
 	.init = ksz8_switch_init,
 	.exit = ksz8_switch_exit,
 	.change_mtu = ksz8_change_mtu,
+	.pme_write8 = ksz8_pme_write8,
+	.pme_pread8 = ksz8_pme_pread8,
+	.pme_pwrite8 = ksz8_pme_pwrite8,
+};
+
+static const struct ksz_dev_ops ksz87xx_dev_ops = {
+	.setup = ksz8_setup,
+	.get_port_addr = ksz8_get_port_addr,
+	.cfg_port_member = ksz8_cfg_port_member,
+	.flush_dyn_mac_table = ksz8_flush_dyn_mac_table,
+	.port_setup = ksz8_port_setup,
+	.r_phy = ksz8_r_phy,
+	.w_phy = ksz8_w_phy,
+	.r_mib_cnt = ksz8_r_mib_cnt,
+	.r_mib_pkt = ksz8_r_mib_pkt,
+	.r_mib_stat64 = ksz_r_mib_stats64,
+	.freeze_mib = ksz8_freeze_mib,
+	.port_init_cnt = ksz8_port_init_cnt,
+	.fdb_dump = ksz8_fdb_dump,
+	.fdb_add = ksz8_fdb_add,
+	.fdb_del = ksz8_fdb_del,
+	.mdb_add = ksz8_mdb_add,
+	.mdb_del = ksz8_mdb_del,
+	.vlan_filtering = ksz8_port_vlan_filtering,
+	.vlan_add = ksz8_port_vlan_add,
+	.vlan_del = ksz8_port_vlan_del,
+	.mirror_add = ksz8_port_mirror_add,
+	.mirror_del = ksz8_port_mirror_del,
+	.get_caps = ksz8_get_caps,
+	.config_cpu_port = ksz8_config_cpu_port,
+	.enable_stp_addr = ksz8_enable_stp_addr,
+	.reset = ksz8_reset_switch,
+	.init = ksz8_switch_init,
+	.exit = ksz8_switch_exit,
+	.change_mtu = ksz8_change_mtu,
+	.pme_write8 = ksz8_pme_write8,
+	.pme_pread8 = ksz8_pme_pread8,
+	.pme_pwrite8 = ksz8_pme_pwrite8,
 };
 
 static void ksz9477_phylink_mac_link_up(struct phylink_config *config,
@@ -348,9 +386,9 @@ static const struct ksz_dev_ops ksz9477_dev_ops = {
 	.mdb_add = ksz9477_mdb_add,
 	.mdb_del = ksz9477_mdb_del,
 	.change_mtu = ksz9477_change_mtu,
-	.get_wol = ksz9477_get_wol,
-	.set_wol = ksz9477_set_wol,
-	.wol_pre_shutdown = ksz9477_wol_pre_shutdown,
+	.pme_write8 = ksz_write8,
+	.pme_pread8 = ksz_pread8,
+	.pme_pwrite8 = ksz_pwrite8,
 	.config_cpu_port = ksz9477_config_cpu_port,
 	.tc_cbs_set_cinc = ksz9477_tc_cbs_set_cinc,
 	.enable_stp_addr = ksz9477_enable_stp_addr,
@@ -423,6 +461,9 @@ static const u16 ksz8795_regs[] = {
 	[S_MULTICAST_CTRL]		= 0x04,
 	[P_XMII_CTRL_0]			= 0x06,
 	[P_XMII_CTRL_1]			= 0x06,
+	[REG_SW_PME_CTRL]		= 0x8003,
+	[REG_PORT_PME_STATUS]		= 0x8003,
+	[REG_PORT_PME_CTRL]		= 0x8007,
 };
 
 static const u32 ksz8795_masks[] = {
@@ -539,6 +580,9 @@ static const u16 ksz9477_regs[] = {
 	[S_MULTICAST_CTRL]		= 0x0331,
 	[P_XMII_CTRL_0]			= 0x0300,
 	[P_XMII_CTRL_1]			= 0x0301,
+	[REG_SW_PME_CTRL]		= 0x0006,
+	[REG_PORT_PME_STATUS]		= 0x0013,
+	[REG_PORT_PME_CTRL]		= 0x0017,
 };
 
 static const u32 ksz9477_masks[] = {
@@ -1253,12 +1297,12 @@ const struct ksz_chip_data ksz_switch_chips[] = {
 		.dev_name = "KSZ8795",
 		.num_vlans = 4096,
 		.num_alus = 0,
-		.num_statics = 8,
+		.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 = &ksz8_dev_ops,
+		.ops = &ksz87xx_dev_ops,
 		.phylink_mac_ops = &ksz8_phylink_mac_ops,
 		.ksz87xx_eee_link_erratum = true,
 		.mib_names = ksz9477_mib_names,
@@ -1294,12 +1338,12 @@ const struct ksz_chip_data ksz_switch_chips[] = {
 		.dev_name = "KSZ8794",
 		.num_vlans = 4096,
 		.num_alus = 0,
-		.num_statics = 8,
+		.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 = &ksz8_dev_ops,
+		.ops = &ksz87xx_dev_ops,
 		.phylink_mac_ops = &ksz8_phylink_mac_ops,
 		.ksz87xx_eee_link_erratum = true,
 		.mib_names = ksz9477_mib_names,
@@ -1321,12 +1365,12 @@ const struct ksz_chip_data ksz_switch_chips[] = {
 		.dev_name = "KSZ8765",
 		.num_vlans = 4096,
 		.num_alus = 0,
-		.num_statics = 8,
+		.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 = &ksz8_dev_ops,
+		.ops = &ksz87xx_dev_ops,
 		.phylink_mac_ops = &ksz8_phylink_mac_ops,
 		.ksz87xx_eee_link_erratum = true,
 		.mib_names = ksz9477_mib_names,
@@ -1353,7 +1397,7 @@ const struct ksz_chip_data ksz_switch_chips[] = {
 		.port_cnt = 3,
 		.num_tx_queues = 4,
 		.num_ipms = 4,
-		.ops = &ksz8_dev_ops,
+		.ops = &ksz88x3_dev_ops,
 		.phylink_mac_ops = &ksz8830_phylink_mac_ops,
 		.mib_names = ksz88xx_mib_names,
 		.mib_cnt = ARRAY_SIZE(ksz88xx_mib_names),
@@ -3742,24 +3786,214 @@ static int ksz_setup_tc(struct dsa_switch *ds, int port,
 	}
 }
 
+/**
+ * ksz_handle_wake_reason - Handle wake reason on a specified port.
+ * @dev: The device structure.
+ * @port: The port number.
+ *
+ * This function reads the PME (Power Management Event) status register of a
+ * specified port to determine the wake reason. If there is no wake event, it
+ * returns early. Otherwise, it logs the wake reason which could be due to a
+ * "Magic Packet", "Link Up", or "Energy Detect" event. The PME status register
+ * is then cleared to acknowledge the handling of the wake event.
+ *
+ * Return: 0 on success, or an error code on failure.
+ */
+int ksz_handle_wake_reason(struct ksz_device *dev, int port)
+{
+	const struct ksz_dev_ops *ops = dev->dev_ops;
+	const u16 *regs = dev->info->regs;
+	u8 pme_status;
+	int ret;
+
+	ret = ops->pme_pread8(dev, port, regs[REG_PORT_PME_STATUS],
+			      &pme_status);
+	if (ret)
+		return ret;
+
+	if (!pme_status)
+		return 0;
+
+	dev_dbg(dev->dev, "Wake event on port %d due to:%s%s%s\n", port,
+		pme_status & PME_WOL_MAGICPKT ? " \"Magic Packet\"" : "",
+		pme_status & PME_WOL_LINKUP ? " \"Link Up\"" : "",
+		pme_status & PME_WOL_ENERGY ? " \"Energy detect\"" : "");
+
+	return ops->pme_pwrite8(dev, port, regs[REG_PORT_PME_STATUS],
+				pme_status);
+}
+
+/**
+ * ksz_get_wol - Get Wake-on-LAN settings for a specified port.
+ * @ds: The dsa_switch structure.
+ * @port: The port number.
+ * @wol: Pointer to ethtool Wake-on-LAN settings structure.
+ *
+ * This function checks the device PME wakeup_source flag and chip_id.
+ * If enabled and supported, it sets the supported and active WoL
+ * flags.
+ */
 static void ksz_get_wol(struct dsa_switch *ds, int port,
 			struct ethtool_wolinfo *wol)
 {
 	struct ksz_device *dev = ds->priv;
+	const u16 *regs = dev->info->regs;
+	u8 pme_ctrl;
+	int ret;
+
+	if (!is_ksz9477(dev) && !ksz_is_ksz87xx(dev))
+		return;
+
+	if (!dev->wakeup_source)
+		return;
+
+	wol->supported = WAKE_PHY;
 
-	if (dev->dev_ops->get_wol)
-		dev->dev_ops->get_wol(dev, port, wol);
+	/* Check if the current MAC address on this port can be set
+	 * as global for WAKE_MAGIC support. The result may vary
+	 * dynamically based on other ports configurations.
+	 */
+	if (ksz_is_port_mac_global_usable(dev->ds, port))
+		wol->supported |= WAKE_MAGIC;
+
+	ret = dev->dev_ops->pme_pread8(dev, port, regs[REG_PORT_PME_CTRL],
+				       &pme_ctrl);
+	if (ret)
+		return;
+
+	if (pme_ctrl & PME_WOL_MAGICPKT)
+		wol->wolopts |= WAKE_MAGIC;
+	if (pme_ctrl & (PME_WOL_LINKUP | PME_WOL_ENERGY))
+		wol->wolopts |= WAKE_PHY;
 }
 
+/**
+ * ksz_set_wol - Set Wake-on-LAN settings for a specified port.
+ * @ds: The dsa_switch structure.
+ * @port: The port number.
+ * @wol: Pointer to ethtool Wake-on-LAN settings structure.
+ *
+ * This function configures Wake-on-LAN (WoL) settings for a specified
+ * port. It validates the provided WoL options, checks if PME is
+ * enabled and supported, clears any previous wake reasons, and sets
+ * the Magic Packet flag in the port's PME control register if
+ * specified.
+ *
+ * Return: 0 on success, or other error codes on failure.
+ */
 static int ksz_set_wol(struct dsa_switch *ds, int port,
 		       struct ethtool_wolinfo *wol)
 {
+	u8 pme_ctrl = 0, pme_ctrl_old = 0;
 	struct ksz_device *dev = ds->priv;
+	const u16 *regs = dev->info->regs;
+	bool magic_switched_off;
+	bool magic_switched_on;
+	int ret;
 
-	if (dev->dev_ops->set_wol)
-		return dev->dev_ops->set_wol(dev, port, wol);
+	if (wol->wolopts & ~(WAKE_PHY | WAKE_MAGIC))
+		return -EINVAL;
+
+	if (!is_ksz9477(dev) && !ksz_is_ksz87xx(dev))
+		return -EOPNOTSUPP;
 
+	if (!dev->wakeup_source)
 		return -EOPNOTSUPP;
+
+	ret = ksz_handle_wake_reason(dev, port);
+	if (ret)
+		return ret;
+
+	if (wol->wolopts & WAKE_MAGIC)
+		pme_ctrl |= PME_WOL_MAGICPKT;
+	if (wol->wolopts & WAKE_PHY)
+		pme_ctrl |= PME_WOL_LINKUP | PME_WOL_ENERGY;
+
+	ret = dev->dev_ops->pme_pread8(dev, port, regs[REG_PORT_PME_CTRL],
+				       &pme_ctrl_old);
+	if (ret)
+		return ret;
+
+	if (pme_ctrl_old == pme_ctrl)
+		return 0;
+
+	magic_switched_off = (pme_ctrl_old & PME_WOL_MAGICPKT) &&
+			    !(pme_ctrl & PME_WOL_MAGICPKT);
+	magic_switched_on = !(pme_ctrl_old & PME_WOL_MAGICPKT) &&
+			    (pme_ctrl & PME_WOL_MAGICPKT);
+
+	/* To keep reference count of MAC address, we should do this
+	 * operation only on change of WOL settings.
+	 */
+	if (magic_switched_on) {
+		ret = ksz_switch_macaddr_get(dev->ds, port, NULL);
+		if (ret)
+			return ret;
+	} else if (magic_switched_off) {
+		ksz_switch_macaddr_put(dev->ds);
+	}
+
+	ret = dev->dev_ops->pme_pwrite8(dev, port, regs[REG_PORT_PME_CTRL],
+					pme_ctrl);
+	if (ret) {
+		if (magic_switched_on)
+			ksz_switch_macaddr_put(dev->ds);
+		return ret;
+	}
+
+	return 0;
+}
+
+/**
+ * ksz_wol_pre_shutdown - Prepares the switch device for shutdown while
+ *                        considering Wake-on-LAN (WoL) settings.
+ * @dev: The switch device structure.
+ * @wol_enabled: Pointer to a boolean which will be set to true if WoL is
+ *               enabled on any port.
+ *
+ * This function prepares the switch device for a safe shutdown while taking
+ * into account the Wake-on-LAN (WoL) settings on the user ports. It updates
+ * the wol_enabled flag accordingly to reflect whether WoL is active on any
+ * port.
+ */
+static void ksz_wol_pre_shutdown(struct ksz_device *dev, bool *wol_enabled)
+{
+	const struct ksz_dev_ops *ops = dev->dev_ops;
+	const u16 *regs = dev->info->regs;
+	u8 pme_pin_en = PME_ENABLE;
+	struct dsa_port *dp;
+	int ret;
+
+	*wol_enabled = false;
+
+	if (!is_ksz9477(dev) && !ksz_is_ksz87xx(dev))
+		return;
+
+	if (!dev->wakeup_source)
+		return;
+
+	dsa_switch_for_each_user_port(dp, dev->ds) {
+		u8 pme_ctrl = 0;
+
+		ret = ops->pme_pread8(dev, dp->index,
+				      regs[REG_PORT_PME_CTRL], &pme_ctrl);
+		if (!ret && pme_ctrl)
+			*wol_enabled = true;
+
+		/* make sure there are no pending wake events which would
+		 * prevent the device from going to sleep/shutdown.
+		 */
+		ksz_handle_wake_reason(dev, dp->index);
+	}
+
+	/* Now we are save to enable PME pin. */
+	if (*wol_enabled) {
+		if (dev->pme_active_high)
+			pme_pin_en |= PME_POLARITY;
+		ops->pme_write8(dev, regs[REG_SW_PME_CTRL], pme_pin_en);
+		if (ksz_is_ksz87xx(dev))
+			ksz_write8(dev, KSZ87XX_REG_INT_EN, KSZ87XX_INT_PME_MASK);
+	}
 }
 
 static int ksz_port_set_mac_address(struct dsa_switch *ds, int port,
@@ -4072,8 +4306,7 @@ void ksz_switch_shutdown(struct ksz_device *dev)
 {
 	bool wol_enabled = false;
 
-	if (dev->dev_ops->wol_pre_shutdown)
-		dev->dev_ops->wol_pre_shutdown(dev, &wol_enabled);
+	ksz_wol_pre_shutdown(dev, &wol_enabled);
 
 	if (dev->dev_ops->reset && !wol_enabled)
 		dev->dev_ops->reset(dev);
@@ -4475,6 +4708,8 @@ int ksz_switch_register(struct ksz_device *dev)
 
 		dev->wakeup_source = of_property_read_bool(dev->dev->of_node,
 							   "wakeup-source");
+		dev->pme_active_high = of_property_read_bool(dev->dev->of_node,
+							     "microchip,pme-active-high");
 	}
 
 	ret = dsa_register_switch(dev->ds);

drivers/net/dsa/microchip/ksz_common.h

@@ -174,6 +174,7 @@ struct ksz_device {
 	bool synclko_125;
 	bool synclko_disable;
 	bool wakeup_source;
+	bool pme_active_high;
 
 	struct vlan_table *vlan_cache;
 
@@ -235,6 +236,9 @@ enum ksz_regs {
 	S_MULTICAST_CTRL,
 	P_XMII_CTRL_0,
 	P_XMII_CTRL_1,
+	REG_SW_PME_CTRL,
+	REG_PORT_PME_STATUS,
+	REG_PORT_PME_CTRL,
 };
 
 enum ksz_masks {
@@ -354,6 +358,11 @@ struct ksz_dev_ops {
 	void (*get_caps)(struct ksz_device *dev, int port,
 			 struct phylink_config *config);
 	int (*change_mtu)(struct ksz_device *dev, int port, int mtu);
+	int (*pme_write8)(struct ksz_device *dev, u32 reg, u8 value);
+	int (*pme_pread8)(struct ksz_device *dev, int port, int offset,
+			  u8 *data);
+	int (*pme_pwrite8)(struct ksz_device *dev, int port, int offset,
+			   u8 data);
 	void (*freeze_mib)(struct ksz_device *dev, int port, bool freeze);
 	void (*port_init_cnt)(struct ksz_device *dev, int port);
 	void (*phylink_mac_link_up)(struct ksz_device *dev, int port,
@@ -363,11 +372,6 @@ struct ksz_dev_ops {
 				    int duplex, bool tx_pause, bool rx_pause);
 	void (*setup_rgmii_delay)(struct ksz_device *dev, int port);
 	int (*tc_cbs_set_cinc)(struct ksz_device *dev, int port, u32 val);
-	void (*get_wol)(struct ksz_device *dev, int port,
-			struct ethtool_wolinfo *wol);
-	int (*set_wol)(struct ksz_device *dev, int port,
-		       struct ethtool_wolinfo *wol);
-	void (*wol_pre_shutdown)(struct ksz_device *dev, bool *wol_enabled);
 	void (*config_cpu_port)(struct dsa_switch *ds);
 	int (*enable_stp_addr)(struct ksz_device *dev);
 	int (*reset)(struct ksz_device *dev);
@@ -391,6 +395,7 @@ int ksz_switch_macaddr_get(struct dsa_switch *ds, int port,
 			   struct netlink_ext_ack *extack);
 void ksz_switch_macaddr_put(struct dsa_switch *ds);
 void ksz_switch_shutdown(struct ksz_device *dev);
+int ksz_handle_wake_reason(struct ksz_device *dev, int port);
 
 /* Common register access functions */
 static inline struct regmap *ksz_regmap_8(struct ksz_device *dev)
@@ -629,6 +634,11 @@ static inline bool is_ksz8(struct ksz_device *dev)
 	return ksz_is_ksz87xx(dev) || ksz_is_ksz88x3(dev);
 }
 
+static inline bool is_ksz9477(struct ksz_device *dev)
+{
+	return dev->chip_id == KSZ9477_CHIP_ID;
+}
+
 static inline int is_lan937x(struct ksz_device *dev)
 {
 	return dev->chip_id == LAN9370_CHIP_ID ||
@@ -695,6 +705,17 @@ static inline bool is_lan937x_tx_phy(struct ksz_device *dev, int port)
 #define P_MII_MAC_MODE			BIT(2)
 #define P_MII_SEL_M			0x3
 
+/* KSZ9477, KSZ87xx Wake-on-LAN (WoL) masks */
+#define PME_WOL_MAGICPKT		BIT(2)
+#define PME_WOL_LINKUP			BIT(1)
+#define PME_WOL_ENERGY			BIT(0)
+
+#define PME_ENABLE			BIT(1)
+#define PME_POLARITY			BIT(0)
+
+#define KSZ87XX_REG_INT_EN		0x7D
+#define KSZ87XX_INT_PME_MASK		BIT(4)
+
 /* Interrupt */
 #define REG_SW_PORT_INT_STATUS__1	0x001B
 #define REG_SW_PORT_INT_MASK__1		0x001F

net/dsa/tag_ksz.c

@@ -111,9 +111,10 @@ static struct sk_buff *ksz_common_rcv(struct sk_buff *skb,
  * DA(6bytes)|SA(6bytes)|....|Data(nbytes)|tag0(1byte)|FCS(4bytes)
  * ---------------------------------------------------------------------------
  * tag0 : zero-based value represents port
- *	  (eg, 0x00=port1, 0x02=port3, 0x06=port7)
+ *	  (eg, 0x0=port1, 0x2=port3, 0x3=port4)
  */
 
+#define KSZ8795_TAIL_TAG_EG_PORT_M	GENMASK(1, 0)
 #define KSZ8795_TAIL_TAG_OVERRIDE	BIT(6)
 #define KSZ8795_TAIL_TAG_LOOKUP		BIT(7)
 
@@ -141,7 +142,8 @@ static struct sk_buff *ksz8795_rcv(struct sk_buff *skb, struct net_device *dev)
 {
 	u8 *tag = skb_tail_pointer(skb) - KSZ_EGRESS_TAG_LEN;
 
-	return ksz_common_rcv(skb, dev, tag[0] & 7, KSZ_EGRESS_TAG_LEN);
+	return ksz_common_rcv(skb, dev, tag[0] & KSZ8795_TAIL_TAG_EG_PORT_M,
+			      KSZ_EGRESS_TAG_LEN);
 }
 
 static const struct dsa_device_ops ksz8795_netdev_ops = {