kernel: add fix for bgmac with B50212E B1 PHY

This PHY requires some extra programming to work reliably with all
devices. Backport upstream fix for it.

Signed-off-by: Rafał Miłecki <rafal@milecki.pl>

2 files changed, 104 insertions, 0 deletions

diff --git a/target/linux/generic/backport-4.9/071-v4.15-0001-net-bgmac-enable-master-mode-for-BCM54210E-and-B5021.patch b/target/linux/generic/backport-4.9/071-v4.15-0001-net-bgmac-enable-master-mode-for-BCM54210E-and-B5021.patch
new file mode 100644
index 0000000000..c371e6355a
--- /dev/null
+++ b/target/linux/generic/backport-4.9/071-v4.15-0001-net-bgmac-enable-master-mode-for-BCM54210E-and-B5021.patch
@@ -0,0 +1,50 @@
+From 12acd136913ccdf394eeb2bc8686ff5505368119 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
+Date: Thu, 12 Oct 2017 10:21:26 +0200
+Subject: [PATCH] net: bgmac: enable master mode for BCM54210E and B50212E PHYs
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+There are 4 very similar PHYs:
+0x600d84a1: BCM54210E (rev B0)
+0x600d84a2: BCM54210E (rev B1)
+0x600d84a5: B50212E (rev B0)
+0x600d84a6: B50212E (rev B1)
+that need setting master mode manually. It's because they run in slave
+mode by default with Automatic Slave/Master configuration disabled which
+can lead to unreliable connection with massive ping loss.
+
+So far it was reported for a board with BCM47189 SoC and B50212E B1 PHY
+connected to the bgmac supported ethernet device. Telling PHY driver to
+setup PHY properly solves this issue.
+
+Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+---
+ drivers/net/ethernet/broadcom/bgmac-bcma.c | 8 +++++++-
+ 1 file changed, 7 insertions(+), 1 deletion(-)
+
+--- a/drivers/net/ethernet/broadcom/bgmac-bcma.c
++++ b/drivers/net/ethernet/broadcom/bgmac-bcma.c
+@@ -159,13 +159,19 @@ static int bgmac_probe(struct bcma_devic
+ 
+ 	if (!bgmac_is_bcm4707_family(core) &&
+ 	    !(ci->id == BCMA_CHIP_ID_BCM53573 && core->core_unit == 1)) {
++		struct phy_device *phydev;
++
+ 		mii_bus = bcma_mdio_mii_register(bgmac);
+ 		if (IS_ERR(mii_bus)) {
+ 			err = PTR_ERR(mii_bus);
+ 			goto err;
+ 		}
+-
+ 		bgmac->mii_bus = mii_bus;
++
++		phydev = mdiobus_get_phy(bgmac->mii_bus, bgmac->phyaddr);
++		if (ci->id == BCMA_CHIP_ID_BCM53573 && phydev &&
++		    (phydev->drv->phy_id & phydev->drv->phy_id_mask) == PHY_ID_BCM54210E)
++			phydev->dev_flags |= PHY_BRCM_EN_MASTER_MODE;
+ 	}
+ 
+ 	if (core->bus->hosttype == BCMA_HOSTTYPE_PCI) {
diff --git a/target/linux/generic/backport-4.9/076-v4.15-0001-net-phy-broadcom-support-new-device-flag-for-setting.patch b/target/linux/generic/backport-4.9/076-v4.15-0001-net-phy-broadcom-support-new-device-flag-for-setting.patch
new file mode 100644
index 0000000000..334c444692
--- /dev/null
+++ b/target/linux/generic/backport-4.9/076-v4.15-0001-net-phy-broadcom-support-new-device-flag-for-setting.patch
@@ -0,0 +1,54 @@
+From 2355a6546a053b1c16ebefd6ce1f0cccc00e1da5 Mon Sep 17 00:00:00 2001
+From: =?UTF-8?q?Rafa=C5=82=20Mi=C5=82ecki?= <rafal@milecki.pl>
+Date: Thu, 12 Oct 2017 10:21:25 +0200
+Subject: [PATCH] net: phy: broadcom: support new device flag for setting
+ master mode
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Some of Broadcom's PHYs run by default in slave mode with Automatic
+Slave/Master configuration disabled. It stops them from working properly
+with some devices.
+
+So far it has been verified for BCM54210E and BCM50212E which don't
+work well with Intel's I217-LM and I218-LM:
+http://ark.intel.com/products/60019/Intel-Ethernet-Connection-I217-LM
+http://ark.intel.com/products/71307/Intel-Ethernet-Connection-I218-LM
+I was told there is massive ping loss.
+
+This commit adds support for a new flag which can be set by an ethernet
+driver to fixup PHY setup.
+
+Signed-off-by: Rafał Miłecki <rafal@milecki.pl>
+Signed-off-by: David S. Miller <davem@davemloft.net>
+---
+ drivers/net/phy/broadcom.c | 6 ++++++
+ include/linux/brcmphy.h    | 1 +
+ 2 files changed, 7 insertions(+)
+
+--- a/drivers/net/phy/broadcom.c
++++ b/drivers/net/phy/broadcom.c
+@@ -43,6 +43,12 @@ static int bcm54210e_config_init(struct
+ 	val &= ~BCM54810_SHD_CLK_CTL_GTXCLK_EN;
+ 	bcm_phy_write_shadow(phydev, BCM54810_SHD_CLK_CTL, val);
+ 
++	if (phydev->dev_flags & PHY_BRCM_EN_MASTER_MODE) {
++		val = phy_read(phydev, MII_CTRL1000);
++		val |= CTL1000_AS_MASTER | CTL1000_ENABLE_MASTER;
++		phy_write(phydev, MII_CTRL1000, val);
++	}
++
+ 	return 0;
+ }
+ 
+--- a/include/linux/brcmphy.h
++++ b/include/linux/brcmphy.h
+@@ -59,6 +59,7 @@
+ #define PHY_BRCM_EXT_IBND_TX_ENABLE	0x00002000
+ #define PHY_BRCM_CLEAR_RGMII_MODE	0x00004000
+ #define PHY_BRCM_DIS_TXCRXC_NOENRGY	0x00008000
++#define PHY_BRCM_EN_MASTER_MODE		0x00010000
+ 
+ /* Broadcom BCM7xxx specific workarounds */
+ #define PHY_BRCM_7XXX_REV(x)		(((x) >> 8) & 0xff)