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Message-Id: <7650f2057c66cd6613ae64c1a6e398df24b99104.1557848472.git.joabreu@synopsys.com> Date: Tue, 14 May 2019 17:45:27 +0200 From: Jose Abreu <Jose.Abreu@...opsys.com> To: netdev@...r.kernel.org, linux-kernel@...r.kernel.org Cc: Jose Abreu <Jose.Abreu@...opsys.com>, Joao Pinto <Joao.Pinto@...opsys.com>, "David S . Miller" <davem@...emloft.net>, Giuseppe Cavallaro <peppe.cavallaro@...com>, Alexandre Torgue <alexandre.torgue@...com>, Corentin Labbe <clabbe.montjoie@...il.com> Subject: [RFC net-next v2 05/14] 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 <joabreu@...opsys.com> Cc: Joao Pinto <jpinto@...opsys.com> Cc: David S. Miller <davem@...emloft.net> Cc: Giuseppe Cavallaro <peppe.cavallaro@...com> Cc: Alexandre Torgue <alexandre.torgue@...com> Cc: Corentin Labbe <clabbe.montjoie@...il.com> --- 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 085b700a4994..f629ccc8932a 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 64b8cb88ea45..c27b3ca052ea 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
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