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path: root/drivers/net/ethernet/realtek/r8169_leds.c
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Diffstat (limited to 'drivers/net/ethernet/realtek/r8169_leds.c')
-rw-r--r--drivers/net/ethernet/realtek/r8169_leds.c168
1 files changed, 168 insertions, 0 deletions
diff --git a/drivers/net/ethernet/realtek/r8169_leds.c b/drivers/net/ethernet/realtek/r8169_leds.c
new file mode 100644
index 0000000000..1c97f3cca2
--- /dev/null
+++ b/drivers/net/ethernet/realtek/r8169_leds.c
@@ -0,0 +1,168 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* r8169_leds.c: Realtek 8169/8168/8101/8125 ethernet driver.
+ *
+ * Copyright (c) 2023 Heiner Kallweit <hkallweit1@gmail.com>
+ *
+ * See MAINTAINERS file for support contact information.
+ */
+
+#include <linux/leds.h>
+#include <linux/netdevice.h>
+#include <uapi/linux/uleds.h>
+
+#include "r8169.h"
+
+#define RTL8168_LED_CTRL_OPTION2 BIT(15)
+#define RTL8168_LED_CTRL_ACT BIT(3)
+#define RTL8168_LED_CTRL_LINK_1000 BIT(2)
+#define RTL8168_LED_CTRL_LINK_100 BIT(1)
+#define RTL8168_LED_CTRL_LINK_10 BIT(0)
+
+#define RTL8168_NUM_LEDS 3
+
+#define RTL8168_SUPPORTED_MODES \
+ (BIT(TRIGGER_NETDEV_LINK_1000) | BIT(TRIGGER_NETDEV_LINK_100) | \
+ BIT(TRIGGER_NETDEV_LINK_10) | BIT(TRIGGER_NETDEV_RX) | \
+ BIT(TRIGGER_NETDEV_TX))
+
+struct r8169_led_classdev {
+ struct led_classdev led;
+ struct net_device *ndev;
+ int index;
+};
+
+#define lcdev_to_r8169_ldev(lcdev) container_of(lcdev, struct r8169_led_classdev, led)
+
+static int rtl8168_led_hw_control_is_supported(struct led_classdev *led_cdev,
+ unsigned long flags)
+{
+ struct r8169_led_classdev *ldev = lcdev_to_r8169_ldev(led_cdev);
+ struct rtl8169_private *tp = netdev_priv(ldev->ndev);
+ int shift = ldev->index * 4;
+ bool rx, tx;
+
+ if (flags & ~RTL8168_SUPPORTED_MODES)
+ goto nosupp;
+
+ rx = flags & BIT(TRIGGER_NETDEV_RX);
+ tx = flags & BIT(TRIGGER_NETDEV_TX);
+ if (rx != tx)
+ goto nosupp;
+
+ return 0;
+
+nosupp:
+ /* Switch LED off to indicate that mode isn't supported */
+ rtl8168_led_mod_ctrl(tp, 0x000f << shift, 0);
+ return -EOPNOTSUPP;
+}
+
+static int rtl8168_led_hw_control_set(struct led_classdev *led_cdev,
+ unsigned long flags)
+{
+ struct r8169_led_classdev *ldev = lcdev_to_r8169_ldev(led_cdev);
+ struct rtl8169_private *tp = netdev_priv(ldev->ndev);
+ int shift = ldev->index * 4;
+ u16 mode = 0;
+
+ if (flags & BIT(TRIGGER_NETDEV_LINK_10))
+ mode |= RTL8168_LED_CTRL_LINK_10;
+ if (flags & BIT(TRIGGER_NETDEV_LINK_100))
+ mode |= RTL8168_LED_CTRL_LINK_100;
+ if (flags & BIT(TRIGGER_NETDEV_LINK_1000))
+ mode |= RTL8168_LED_CTRL_LINK_1000;
+ if (flags & BIT(TRIGGER_NETDEV_TX))
+ mode |= RTL8168_LED_CTRL_ACT;
+
+ return rtl8168_led_mod_ctrl(tp, 0x000f << shift, mode << shift);
+}
+
+static int rtl8168_led_hw_control_get(struct led_classdev *led_cdev,
+ unsigned long *flags)
+{
+ struct r8169_led_classdev *ldev = lcdev_to_r8169_ldev(led_cdev);
+ struct rtl8169_private *tp = netdev_priv(ldev->ndev);
+ int shift = ldev->index * 4;
+ int mode;
+
+ mode = rtl8168_get_led_mode(tp);
+ if (mode < 0)
+ return mode;
+
+ if (mode & RTL8168_LED_CTRL_OPTION2) {
+ rtl8168_led_mod_ctrl(tp, RTL8168_LED_CTRL_OPTION2, 0);
+ netdev_notice(ldev->ndev, "Deactivating unsupported Option2 LED mode\n");
+ }
+
+ mode = (mode >> shift) & 0x000f;
+
+ if (mode & RTL8168_LED_CTRL_ACT)
+ *flags |= BIT(TRIGGER_NETDEV_TX) | BIT(TRIGGER_NETDEV_RX);
+
+ if (mode & RTL8168_LED_CTRL_LINK_10)
+ *flags |= BIT(TRIGGER_NETDEV_LINK_10);
+ if (mode & RTL8168_LED_CTRL_LINK_100)
+ *flags |= BIT(TRIGGER_NETDEV_LINK_100);
+ if (mode & RTL8168_LED_CTRL_LINK_1000)
+ *flags |= BIT(TRIGGER_NETDEV_LINK_1000);
+
+ return 0;
+}
+
+static struct device *
+ r8169_led_hw_control_get_device(struct led_classdev *led_cdev)
+{
+ struct r8169_led_classdev *ldev = lcdev_to_r8169_ldev(led_cdev);
+
+ return &ldev->ndev->dev;
+}
+
+static void rtl8168_setup_ldev(struct r8169_led_classdev *ldev,
+ struct net_device *ndev, int index)
+{
+ struct rtl8169_private *tp = netdev_priv(ndev);
+ struct led_classdev *led_cdev = &ldev->led;
+ char led_name[LED_MAX_NAME_SIZE];
+
+ ldev->ndev = ndev;
+ ldev->index = index;
+
+ r8169_get_led_name(tp, index, led_name, LED_MAX_NAME_SIZE);
+ led_cdev->name = led_name;
+ led_cdev->default_trigger = "netdev";
+ led_cdev->hw_control_trigger = "netdev";
+ led_cdev->flags |= LED_RETAIN_AT_SHUTDOWN;
+ led_cdev->hw_control_is_supported = rtl8168_led_hw_control_is_supported;
+ led_cdev->hw_control_set = rtl8168_led_hw_control_set;
+ led_cdev->hw_control_get = rtl8168_led_hw_control_get;
+ led_cdev->hw_control_get_device = r8169_led_hw_control_get_device;
+
+ /* ignore errors */
+ led_classdev_register(&ndev->dev, led_cdev);
+}
+
+struct r8169_led_classdev *rtl8168_init_leds(struct net_device *ndev)
+{
+ struct r8169_led_classdev *leds;
+ int i;
+
+ leds = kcalloc(RTL8168_NUM_LEDS + 1, sizeof(*leds), GFP_KERNEL);
+ if (!leds)
+ return NULL;
+
+ for (i = 0; i < RTL8168_NUM_LEDS; i++)
+ rtl8168_setup_ldev(leds + i, ndev, i);
+
+ return leds;
+}
+
+void r8169_remove_leds(struct r8169_led_classdev *leds)
+{
+ if (!leds)
+ return;
+
+ for (struct r8169_led_classdev *l = leds; l->ndev; l++)
+ led_classdev_unregister(&l->led);
+
+ kfree(leds);
+}