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Commit 1579f678 authored by Ed Blake's avatar Ed Blake Committed by David S. Miller
Browse files

net: stmmac: dwmac4: Re-enable MAC Rx before powering down 



Re-enable the MAC receiver by setting CONFIG_RE before powering down,
as instructed in section 6.3.5.1 of [1].  Without this the MAC fails
to receive WoL packets and never wakes up.

[1] DWC Ethernet QoS Databook 4.10a October 2014

Signed-off-by: default avatarEd Blake <ed.blake@sondrel.com>
Signed-off-by: default avatarDavid S. Miller <davem@davemloft.net>
parent 06d7a1b9

drivers/net/ethernet/stmicro/stmmac/dwmac4_core.c

+7 −0
Original line number Original line Diff line number Diff line
@@ -296,6 +296,7 @@ static void dwmac4_pmt(struct mac_device_info *hw, unsigned long mode) 
{

{

	void __iomem *ioaddr = hw->pcsr;

	void __iomem *ioaddr = hw->pcsr;

	unsigned int pmt = 0;

	unsigned int pmt = 0;

	u32 config;





	if (mode & WAKE_MAGIC) {

	if (mode & WAKE_MAGIC) {

		pr_debug("GMAC: WOL Magic frame\n");

		pr_debug("GMAC: WOL Magic frame\n");
@@ -306,6 +307,12 @@ static void dwmac4_pmt(struct mac_device_info *hw, unsigned long mode) 
		pmt |= power_down | global_unicast | wake_up_frame_en;

		pmt |= power_down | global_unicast | wake_up_frame_en;

	}

	}





	if (pmt) {

		/* The receiver must be enabled for WOL before powering down */

		config = readl(ioaddr + GMAC_CONFIG);

		config |= GMAC_CONFIG_RE;

		writel(config, ioaddr + GMAC_CONFIG);

	}

	writel(pmt, ioaddr + GMAC_PMT);

	writel(pmt, ioaddr + GMAC_PMT);

}

}