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Date: Mon, 24 Jun 2024 01:40:33 +0200
From: Marek Vasut <marex@...x.de>
To: netdev@...r.kernel.org
Cc: Marek Vasut <marex@...x.de>,
Alexandre Torgue <alexandre.torgue@...s.st.com>,
Andrew Lunn <andrew@...n.ch>,
Christophe Roullier <christophe.roullier@...s.st.com>,
"David S . Miller" <davem@...emloft.net>,
Eric Dumazet <edumazet@...gle.com>,
Heiner Kallweit <hkallweit1@...il.com>,
Jakub Kicinski <kuba@...nel.org>,
Paolo Abeni <pabeni@...hat.com>,
Russell King <linux@...linux.org.uk>,
kernel@...electronics.com,
linux-kernel@...r.kernel.org
Subject: [net-next,PATCH] net: phy: realtek: Add support for PHY LEDs on RTL8211F
Realtek RTL8211F Ethernet PHY supports 3 LED pins which are used to
indicate link status and activity. Add minimal LED controller driver
supporting the most common uses with the 'netdev' trigger.
Signed-off-by: Marek Vasut <marex@...x.de>
---
Cc: Alexandre Torgue <alexandre.torgue@...s.st.com>
Cc: Andrew Lunn <andrew@...n.ch>
Cc: Christophe Roullier <christophe.roullier@...s.st.com>
Cc: David S. Miller <davem@...emloft.net>
Cc: Eric Dumazet <edumazet@...gle.com>
Cc: Heiner Kallweit <hkallweit1@...il.com>
Cc: Jakub Kicinski <kuba@...nel.org>
Cc: Paolo Abeni <pabeni@...hat.com>
Cc: Russell King <linux@...linux.org.uk>
Cc: kernel@...electronics.com
Cc: linux-kernel@...r.kernel.org
Cc: netdev@...r.kernel.org
---
drivers/net/phy/realtek.c | 102 ++++++++++++++++++++++++++++++++++++++
1 file changed, 102 insertions(+)
diff --git a/drivers/net/phy/realtek.c b/drivers/net/phy/realtek.c
index 2174893c974f3..cb7860571adcb 100644
--- a/drivers/net/phy/realtek.c
+++ b/drivers/net/phy/realtek.c
@@ -32,6 +32,15 @@
#define RTL8211F_PHYCR2 0x19
#define RTL8211F_INSR 0x1d
+#define RTL8211F_LEDCR 0x10
+#define RTL8211F_LEDCR_MODE BIT(15)
+#define RTL8211F_LEDCR_ACT_TXRX BIT(4)
+#define RTL8211F_LEDCR_LINK_1000 BIT(3)
+#define RTL8211F_LEDCR_LINK_100 BIT(1)
+#define RTL8211F_LEDCR_LINK_10 BIT(0)
+#define RTL8211F_LEDCR_MASK GENMASK(4, 0)
+#define RTL8211F_LEDCR_SHIFT 5
+
#define RTL8211F_TX_DELAY BIT(8)
#define RTL8211F_RX_DELAY BIT(3)
@@ -87,6 +96,8 @@
#define RTL_8221B_VN_CG 0x001cc84a
#define RTL_8251B 0x001cc862
+#define RTL8211F_LED_COUNT 3
+
MODULE_DESCRIPTION("Realtek PHY driver");
MODULE_AUTHOR("Johnson Leung");
MODULE_LICENSE("GPL");
@@ -476,6 +487,94 @@ static int rtl821x_resume(struct phy_device *phydev)
return 0;
}
+static int rtl8211f_led_hw_is_supported(struct phy_device *phydev, u8 index,
+ unsigned long rules)
+{
+ const unsigned long mask = BIT(TRIGGER_NETDEV_LINK_10) |
+ BIT(TRIGGER_NETDEV_LINK_100) |
+ BIT(TRIGGER_NETDEV_LINK_1000) |
+ BIT(TRIGGER_NETDEV_RX) |
+ BIT(TRIGGER_NETDEV_TX);
+
+ /* The RTL8211F PHY supports these LED settings on up to three LEDs:
+ * - Link: Configurable subset of 10/100/1000 link rates
+ * - Active: Blink on activity, RX or TX is not differentiated
+ * The Active option has two modes, A and B:
+ * - A: Link and Active indication at configurable, but matching,
+ * subset of 10/100/1000 link rates
+ * - B: Link indication at configurable subset of 10/100/1000 link
+ * rates and Active indication always at all three 10+100+1000
+ * link rates.
+ * This code currently uses mode B only.
+ */
+
+ if (index >= RTL8211F_LED_COUNT)
+ return -EINVAL;
+
+ /* Filter out any other unsupported triggers. */
+ if (rules & ~mask)
+ return -EOPNOTSUPP;
+
+ return 0;
+}
+
+static int rtl8211f_led_hw_control_get(struct phy_device *phydev, u8 index,
+ unsigned long *rules)
+{
+ int val;
+
+ val = phy_read_paged(phydev, 0xd04, RTL8211F_LEDCR);
+ if (val < 0)
+ return val;
+
+ val >>= RTL8211F_LEDCR_SHIFT * index;
+ val &= RTL8211F_LEDCR_MASK;
+
+ if (val & RTL8211F_LEDCR_LINK_10)
+ set_bit(TRIGGER_NETDEV_LINK_10, rules);
+
+ if (val & RTL8211F_LEDCR_LINK_100)
+ set_bit(TRIGGER_NETDEV_LINK_100, rules);
+
+ if (val & RTL8211F_LEDCR_LINK_1000)
+ set_bit(TRIGGER_NETDEV_LINK_1000, rules);
+
+ if (val & RTL8211F_LEDCR_ACT_TXRX) {
+ set_bit(TRIGGER_NETDEV_RX, rules);
+ set_bit(TRIGGER_NETDEV_TX, rules);
+ }
+
+ return 0;
+}
+
+static int rtl8211f_led_hw_control_set(struct phy_device *phydev, u8 index,
+ unsigned long rules)
+{
+ const u16 mask = RTL8211F_LEDCR_MASK << (RTL8211F_LEDCR_SHIFT * index);
+ u16 reg = RTL8211F_LEDCR_MODE; /* Mode B */
+
+ if (index >= RTL8211F_LED_COUNT)
+ return -EINVAL;
+
+ if (test_bit(TRIGGER_NETDEV_LINK_10, &rules))
+ reg |= RTL8211F_LEDCR_LINK_10;
+
+ if (test_bit(TRIGGER_NETDEV_LINK_100, &rules))
+ reg |= RTL8211F_LEDCR_LINK_100;
+
+ if (test_bit(TRIGGER_NETDEV_LINK_1000, &rules))
+ reg |= RTL8211F_LEDCR_LINK_1000;
+
+ if (test_bit(TRIGGER_NETDEV_RX, &rules) ||
+ test_bit(TRIGGER_NETDEV_TX, &rules)) {
+ reg |= RTL8211F_LEDCR_ACT_TXRX;
+ }
+
+ reg <<= RTL8211F_LEDCR_SHIFT * index;
+
+ return phy_modify_paged(phydev, 0xd04, RTL8211F_LEDCR, mask, reg);
+}
+
static int rtl8211e_config_init(struct phy_device *phydev)
{
int ret = 0, oldpage;
@@ -1192,6 +1291,9 @@ static struct phy_driver realtek_drvs[] = {
.read_page = rtl821x_read_page,
.write_page = rtl821x_write_page,
.flags = PHY_ALWAYS_CALL_SUSPEND,
+ .led_hw_is_supported = rtl8211f_led_hw_is_supported,
+ .led_hw_control_get = rtl8211f_led_hw_control_get,
+ .led_hw_control_set = rtl8211f_led_hw_control_set,
}, {
PHY_ID_MATCH_EXACT(RTL_8211FVD_PHYID),
.name = "RTL8211F-VD Gigabit Ethernet",
--
2.43.0
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