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Message-Id: <20250428-realtek_wol-v1-1-15de3139d488@kuka.com>
Date: Mon, 28 Apr 2025 09:09:07 +0200
From: Daniel Braunwarth via B4 Relay <devnull+daniel.braunwarth.kuka.com@...nel.org>
To: Andrew Lunn <andrew@...n.ch>, Heiner Kallweit <hkallweit1@...il.com>,
Russell King <linux@...linux.org.uk>,
"David S. Miller" <davem@...emloft.net>, Eric Dumazet <edumazet@...gle.com>,
Jakub Kicinski <kuba@...nel.org>, Paolo Abeni <pabeni@...hat.com>
Cc: netdev@...r.kernel.org, linux-kernel@...r.kernel.org,
Daniel Braunwarth <daniel.braunwarth@...a.com>
Subject: [PATCH net-next] net: phy: realtek: Add support for WOL magic
packet on RTL8211F
From: Daniel Braunwarth <daniel.braunwarth@...a.com>
The RTL8211F supports multiple WOL modes. This patch adds support for
magic packets.
The PHY notifies the system via the INTB/PMEB pin when a WOL event
occurs.
Signed-off-by: Daniel Braunwarth <daniel.braunwarth@...a.com>
---
drivers/net/phy/realtek/realtek_main.c | 58 ++++++++++++++++++++++++++++++++++
1 file changed, 58 insertions(+)
diff --git a/drivers/net/phy/realtek/realtek_main.c b/drivers/net/phy/realtek/realtek_main.c
index 893c824796715a905bab99646a474c3bea95ec11..ed2fd6a0d7466e9638ab988efb03934556f52794 100644
--- a/drivers/net/phy/realtek/realtek_main.c
+++ b/drivers/net/phy/realtek/realtek_main.c
@@ -10,6 +10,7 @@
#include <linux/bitops.h>
#include <linux/of.h>
#include <linux/phy.h>
+#include <linux/netdevice.h>
#include <linux/module.h>
#include <linux/delay.h>
#include <linux/clk.h>
@@ -38,6 +39,10 @@
#define RTL8211F_INSR 0x1d
+#define RTL8211F_WOL_MAGIC BIT(12)
+#define RTL8211F_WOL_CLEAR (BIT(15) | 0x1fff)
+#define RTL8211F_WOL_INT_ENABLE BIT(5)
+
#define RTL8211F_LEDCR 0x10
#define RTL8211F_LEDCR_MODE BIT(15)
#define RTL8211F_LEDCR_ACT_TXRX BIT(4)
@@ -123,6 +128,7 @@ struct rtl821x_priv {
u16 phycr2;
bool has_phycr2;
struct clk *clk;
+ u32 saved_wolopts;
};
static int rtl821x_read_page(struct phy_device *phydev)
@@ -354,6 +360,56 @@ static irqreturn_t rtl8211f_handle_interrupt(struct phy_device *phydev)
return IRQ_HANDLED;
}
+static void rtl8211f_get_wol(struct phy_device *dev, struct ethtool_wolinfo *wol)
+{
+ struct rtl821x_priv *priv = dev->priv;
+
+ wol->supported = WAKE_MAGIC;
+ wol->wolopts = priv->saved_wolopts;
+}
+
+static int rtl8211f_set_wol(struct phy_device *dev, struct ethtool_wolinfo *wol)
+{
+ struct rtl821x_priv *priv = dev->priv;
+ const u8 *mac_addr = dev->attached_dev->dev_addr;
+ int oldpage;
+
+ oldpage = phy_save_page(dev);
+ if (oldpage < 0)
+ goto err;
+
+ if (wol->wolopts & WAKE_MAGIC) {
+ /* Store the device address for the magic packet */
+ rtl821x_write_page(dev, 0xd8c);
+ __phy_write(dev, 16, mac_addr[1] << 8 | (mac_addr[0]));
+ __phy_write(dev, 17, mac_addr[3] << 8 | (mac_addr[2]));
+ __phy_write(dev, 18, mac_addr[5] << 8 | (mac_addr[4]));
+
+ /* Clear WOL status and enable magic packet matching */
+ rtl821x_write_page(dev, 0xd8a);
+ __phy_write(dev, 16, RTL8211F_WOL_MAGIC);
+ __phy_write(dev, 17, RTL8211F_WOL_CLEAR);
+
+ /* Enable the WOL interrupt */
+ rtl821x_write_page(dev, 0xd40);
+ __phy_set_bits(dev, 0x16, RTL8211F_WOL_INT_ENABLE);
+ } else {
+ /* Disable the WOL interrupt */
+ rtl821x_write_page(dev, 0xd40);
+ __phy_clear_bits(dev, 0x16, RTL8211F_WOL_INT_ENABLE);
+
+ /* Clear WOL status and disable magic packet matching */
+ rtl821x_write_page(dev, 0xd8a);
+ __phy_write(dev, 16, 0x0);
+ __phy_write(dev, 17, RTL8211F_WOL_CLEAR);
+ }
+
+ priv->saved_wolopts = wol->wolopts;
+
+err:
+ return phy_restore_page(dev, oldpage, 0);
+}
+
static int rtl8211_config_aneg(struct phy_device *phydev)
{
int ret;
@@ -1400,6 +1456,8 @@ static struct phy_driver realtek_drvs[] = {
.read_status = rtlgen_read_status,
.config_intr = &rtl8211f_config_intr,
.handle_interrupt = rtl8211f_handle_interrupt,
+ .set_wol = rtl8211f_set_wol,
+ .get_wol = rtl8211f_get_wol,
.suspend = rtl821x_suspend,
.resume = rtl821x_resume,
.read_page = rtl821x_read_page,
---
base-commit: 4acf6d4f6afc3478753e49c495132619667549d9
change-id: 20250425-realtek_wol-6e2df8ea8cf2
Best regards,
--
Daniel Braunwarth <daniel.braunwarth@...a.com>
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