diff options
Diffstat (limited to 'drivers/net/ethernet/realtek/r8169_leds.c')
| -rw-r--r-- | drivers/net/ethernet/realtek/r8169_leds.c | 157 |
1 files changed, 157 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 000000000000..007d077edcad --- /dev/null +++ b/drivers/net/ethernet/realtek/r8169_leds.c @@ -0,0 +1,157 @@ +// 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 */ + devm_led_classdev_register(&ndev->dev, led_cdev); +} + +void rtl8168_init_leds(struct net_device *ndev) +{ + /* bind resource mgmt to netdev */ + struct device *dev = &ndev->dev; + struct r8169_led_classdev *leds; + int i; + + leds = devm_kcalloc(dev, RTL8168_NUM_LEDS, sizeof(*leds), GFP_KERNEL); + if (!leds) + return; + + for (i = 0; i < RTL8168_NUM_LEDS; i++) + rtl8168_setup_ldev(leds + i, ndev, i); +} |