kernel: re-add patch for AT8032 Ethernet PHY

The patch was wrongly removed by a kernel version bump to 4.9.105 in
the believe that it was merged upstream thow it wasn't. This lead to
unrecoverable link losses on devices which use those PHYs such as
many ubnt single-port CPEs.

Fixes: 7dca1bae82 (kernel: bump to 4.9.105)
Signed-off-by: Daniel Golle <daniel@makrotopia.org>

4 files changed, 81 insertions, 11 deletions

diff --git a/target/linux/ar71xx/patches-4.9/902-at803x-add-reset-gpio-pdata.patch b/target/linux/ar71xx/patches-4.9/902-at803x-add-reset-gpio-pdata.patch
index fb6f85cdfd..cb3ed89e98 100644
--- a/target/linux/ar71xx/patches-4.9/902-at803x-add-reset-gpio-pdata.patch
+++ b/target/linux/ar71xx/patches-4.9/902-at803x-add-reset-gpio-pdata.patch
@@ -16,7 +16,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
  #endif /* _PHY_AT803X_PDATA_H */
 --- a/drivers/net/phy/at803x.c
 +++ b/drivers/net/phy/at803x.c
-@@ -263,6 +263,7 @@ static int at803x_resume(struct phy_devi
+@@ -264,6 +264,7 @@ static int at803x_resume(struct phy_devi
  
  static int at803x_probe(struct phy_device *phydev)
  {
@@ -24,8 +24,8 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
  	struct device *dev = &phydev->mdio.dev;
  	struct at803x_priv *priv;
  	struct gpio_desc *gpiod_reset;
-@@ -274,6 +275,12 @@ static int at803x_probe(struct phy_devic
- 	if (phydev->drv->phy_id != ATH8030_PHY_ID)
+@@ -276,6 +277,12 @@ static int at803x_probe(struct phy_devic
+ 	    phydev->drv->phy_id != ATH8032_PHY_ID)
  		goto does_not_require_reset_workaround;
  
 +	pdata = dev_get_platdata(dev);
@@ -37,7 +37,7 @@ Signed-off-by: Felix Fietkau <nbd@nbd.name>
  	gpiod_reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
  	if (IS_ERR(gpiod_reset))
  		return PTR_ERR(gpiod_reset);
-@@ -405,15 +412,23 @@ static void at803x_link_change_notify(st
+@@ -407,15 +414,23 @@ static void at803x_link_change_notify(st
  	 * cannot recover from by software.
  	 */
  	if (phydev->state == PHY_NOLINK) {
diff --git a/target/linux/generic/pending-4.9/180-net-phy-at803x-add-support-for-AT8032.patch b/target/linux/generic/pending-4.9/180-net-phy-at803x-add-support-for-AT8032.patch
new file mode 100644
index 0000000000..f2d5df503f
--- /dev/null
+++ b/target/linux/generic/pending-4.9/180-net-phy-at803x-add-support-for-AT8032.patch
@@ -0,0 +1,70 @@
+From: Felix Fietkau <nbd@nbd.name>
+Subject: net: phy: at803x: add support for AT8032
+
+Like AT8030, this PHY needs the GPIO reset workaround
+
+Signed-off-by: Felix Fietkau <nbd@nbd.name>
+---
+
+--- a/drivers/net/phy/at803x.c
++++ b/drivers/net/phy/at803x.c
+@@ -62,6 +62,7 @@
+ 
+ #define ATH8030_PHY_ID 0x004dd076
+ #define ATH8031_PHY_ID 0x004dd074
++#define ATH8032_PHY_ID 0x004dd023
+ #define ATH8035_PHY_ID 0x004dd072
+ 
+ MODULE_DESCRIPTION("Atheros 803x PHY driver");
+@@ -259,7 +260,8 @@ static int at803x_probe(struct phy_devic
+ 	if (!priv)
+ 		return -ENOMEM;
+ 
+-	if (phydev->drv->phy_id != ATH8030_PHY_ID)
++	if (phydev->drv->phy_id != ATH8030_PHY_ID &&
++	    phydev->drv->phy_id != ATH8032_PHY_ID)
+ 		goto does_not_require_reset_workaround;
+ 
+ 	gpiod_reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_LOW);
+@@ -335,7 +337,7 @@ static void at803x_link_change_notify(st
+ 	struct at803x_priv *priv = phydev->priv;
+ 
+ 	/*
+-	 * Conduct a hardware reset for AT8030 every time a link loss is
++	 * Conduct a hardware reset for AT8030/2 every time a link loss is
+ 	 * signalled. This is necessary to circumvent a hardware bug that
+ 	 * occurs when the cable is unplugged while TX packets are pending
+ 	 * in the FIFO. In such cases, the FIFO enters an error mode it
+@@ -447,6 +449,24 @@ static struct phy_driver at803x_driver[]
+ 	.aneg_done		= at803x_aneg_done,
+ 	.ack_interrupt		= &at803x_ack_interrupt,
+ 	.config_intr		= &at803x_config_intr,
++}, {
++	/* ATHEROS 8032 */
++	.phy_id			= ATH8032_PHY_ID,
++	.name			= "Atheros 8032 ethernet",
++	.phy_id_mask		= 0xffffffef,
++	.probe			= at803x_probe,
++	.config_init		= at803x_config_init,
++	.link_change_notify	= at803x_link_change_notify,
++	.set_wol		= at803x_set_wol,
++	.get_wol		= at803x_get_wol,
++	.suspend		= at803x_suspend,
++	.resume			= at803x_resume,
++	.features		= PHY_BASIC_FEATURES,
++	.flags			= PHY_HAS_INTERRUPT,
++	.config_aneg		= genphy_config_aneg,
++	.read_status		= genphy_read_status,
++	.ack_interrupt		= at803x_ack_interrupt,
++	.config_intr		= at803x_config_intr,
+ } };
+ 
+ module_phy_driver(at803x_driver);
+@@ -454,6 +474,7 @@ module_phy_driver(at803x_driver);
+ static struct mdio_device_id __maybe_unused atheros_tbl[] = {
+ 	{ ATH8030_PHY_ID, 0xffffffef },
+ 	{ ATH8031_PHY_ID, 0xffffffef },
++	{ ATH8032_PHY_ID, 0xffffffef },
+ 	{ ATH8035_PHY_ID, 0xffffffef },
+ 	{ }
+ };
diff --git a/target/linux/generic/pending-4.9/734-net-phy-at803x-allow-to-configure-via-pdata.patch b/target/linux/generic/pending-4.9/734-net-phy-at803x-allow-to-configure-via-pdata.patch
index 8bd9ce3bf7..69b21be951 100644
--- a/target/linux/generic/pending-4.9/734-net-phy-at803x-allow-to-configure-via-pdata.patch
+++ b/target/linux/generic/pending-4.9/734-net-phy-at803x-allow-to-configure-via-pdata.patch
@@ -40,7 +40,7 @@ Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
  #define AT803X_DEBUG_ADDR			0x1D
  #define AT803X_DEBUG_DATA			0x1E
  
-@@ -71,6 +78,7 @@ MODULE_LICENSE("GPL");
+@@ -72,6 +79,7 @@ MODULE_LICENSE("GPL");
  struct at803x_priv {
  	bool phy_reset:1;
  	struct gpio_desc *gpiod_reset;
@@ -48,7 +48,7 @@ Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
  };
  
  struct at803x_context {
-@@ -274,8 +282,16 @@ does_not_require_reset_workaround:
+@@ -276,8 +284,16 @@ does_not_require_reset_workaround:
  	return 0;
  }
  
@@ -65,7 +65,7 @@ Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
  	int ret;
  
  	ret = genphy_config_init(phydev);
-@@ -296,6 +312,26 @@ static int at803x_config_init(struct phy
+@@ -298,6 +314,26 @@ static int at803x_config_init(struct phy
  			return ret;
  	}
  
@@ -92,7 +92,7 @@ Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
  	return 0;
  }
  
-@@ -333,6 +369,8 @@ static int at803x_config_intr(struct phy
+@@ -335,6 +371,8 @@ static int at803x_config_intr(struct phy
  static void at803x_link_change_notify(struct phy_device *phydev)
  {
  	struct at803x_priv *priv = phydev->priv;
@@ -100,8 +100,8 @@ Signed-off-by: Gabor Juhos <juhosg@openwrt.org>
 +	pdata = dev_get_platdata(&phydev->mdio.dev);
  
  	/*
- 	 * Conduct a hardware reset for AT8030 every time a link loss is
-@@ -361,6 +399,24 @@ static void at803x_link_change_notify(st
+ 	 * Conduct a hardware reset for AT8030/2 every time a link loss is
+@@ -363,6 +401,24 @@ static void at803x_link_change_notify(st
  	} else {
  		priv->phy_reset = false;
  	}
diff --git a/target/linux/generic/pending-4.9/735-net-phy-at803x-fix-at8033-sgmii-mode.patch b/target/linux/generic/pending-4.9/735-net-phy-at803x-fix-at8033-sgmii-mode.patch
index 1f689850bd..485567cd76 100644
--- a/target/linux/generic/pending-4.9/735-net-phy-at803x-fix-at8033-sgmii-mode.patch
+++ b/target/linux/generic/pending-4.9/735-net-phy-at803x-fix-at8033-sgmii-mode.patch
@@ -24,7 +24,7 @@ Signed-off-by: Roman Yeryomin <roman@advem.lv>
  #define AT803X_MODE_CFG_MASK			0x0F
  #define AT803X_MODE_CFG_SGMII			0x01
  
-@@ -293,6 +297,27 @@ static int at803x_config_init(struct phy
+@@ -295,6 +299,27 @@ static int at803x_config_init(struct phy
  {
  	struct at803x_platform_data *pdata;
  	int ret;