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// 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
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 bool r8169_trigger_mode_is_valid(unsigned long flags)
{
bool rx, tx;
if (flags & BIT(TRIGGER_NETDEV_HALF_DUPLEX))
return false;
if (flags & BIT(TRIGGER_NETDEV_FULL_DUPLEX))
return false;
rx = flags & BIT(TRIGGER_NETDEV_RX);
tx = flags & BIT(TRIGGER_NETDEV_TX);
return rx == tx;
}
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;
if (!r8169_trigger_mode_is_valid(flags)) {
/* Switch LED off to indicate that mode isn't supported */
rtl8168_led_mod_ctrl(tp, 0x000f << shift, 0);
return -EOPNOTSUPP;
}
return 0;
}
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->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);
}
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