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net: phy: realtek: Add support for PHY LEDs on RTL8211F

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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@denx.de>
Signed-off-by: David S. Miller <davem@davemloft.net>
This commit is contained in:
Marek Vasut 2024-06-25 22:42:17 +02:00 committed by David S. Miller
parent 30972a4ea0
commit 17784801d8
1 changed files with 106 additions and 0 deletions
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106
drivers/net/phy/realtek.c
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@ -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 +487,98 @@ 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;
/* RX and TX are not differentiated, either both are set or not set. */
if (!(rules & BIT(TRIGGER_NETDEV_RX)) ^ !(rules & BIT(TRIGGER_NETDEV_TX)))
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 +1295,9 @@ 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",