From 84c8df164906d130e9c00a68e33d811cf37b8ba1 Mon Sep 17 00:00:00 2001 From: Jose Abreu Date: Fri, 24 May 2019 10:20:13 +0200 Subject: [PATCH] net: stmmac: dwxgmac2: Add MAC loopback support In preparation for the addition of stmmac selftests we implement the MAC loopback callback in dwxgmac2 core. Signed-off-by: Jose Abreu Cc: Joao Pinto Cc: David S. Miller Cc: Giuseppe Cavallaro Cc: Alexandre Torgue Signed-off-by: David S. Miller --- drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h | 1 + drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c | 13 +++++++++++++ 2 files changed, 14 insertions(+) diff --git a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h index 085b700..f629ccc 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h +++ b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2.h @@ -29,6 +29,7 @@ #define XGMAC_CONFIG_GPSL GENMASK(29, 16) #define XGMAC_CONFIG_GPSL_SHIFT 16 #define XGMAC_CONFIG_S2KP BIT(11) +#define XGMAC_CONFIG_LM BIT(10) #define XGMAC_CONFIG_IPC BIT(9) #define XGMAC_CONFIG_JE BIT(8) #define XGMAC_CONFIG_WD BIT(7) diff --git a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c index 64b8cb8..c27b3ca 100644 --- a/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c +++ b/drivers/net/ethernet/stmicro/stmmac/dwxgmac2_core.c @@ -321,6 +321,18 @@ static void dwxgmac2_set_filter(struct mac_device_info *hw, writel(value, ioaddr + XGMAC_PACKET_FILTER); } +static void dwxgmac2_set_mac_loopback(void __iomem *ioaddr, bool enable) +{ + u32 value = readl(ioaddr + XGMAC_RX_CONFIG); + + if (enable) + value |= XGMAC_CONFIG_LM; + else + value &= ~XGMAC_CONFIG_LM; + + writel(value, ioaddr + XGMAC_RX_CONFIG); +} + const struct stmmac_ops dwxgmac210_ops = { .core_init = dwxgmac2_core_init, .set_mac = dwxgmac2_set_mac, @@ -350,6 +362,7 @@ const struct stmmac_ops dwxgmac210_ops = { .pcs_get_adv_lp = NULL, .debug = NULL, .set_filter = dwxgmac2_set_filter, + .set_mac_loopback = dwxgmac2_set_mac_loopback, }; int dwxgmac2_setup(struct stmmac_priv *priv) -- 2.7.4