kernel: 5.10: backport 100 BaseX SFP support

Backport upstream support for 100Base-FX, 100Base-LX, 100Base-PX and
100Base-BX10 SFP modules.

This is a prerequisite for the Globalscale MOCHAbin hybrid 1G
SFP/Copper support backporting.

Signed-off-by: Robert Marko <robert.marko@sartura.hr>

2 files changed, 96 insertions, 0 deletions

diff --git a/target/linux/generic/backport-5.10/740-v5.12-net-phy-Add-100-base-x-mode.patch b/target/linux/generic/backport-5.10/740-v5.12-net-phy-Add-100-base-x-mode.patch
new file mode 100644
index 0000000000..5c7f97ea90
--- /dev/null
+++ b/target/linux/generic/backport-5.10/740-v5.12-net-phy-Add-100-base-x-mode.patch
@@ -0,0 +1,56 @@
+From b1ae3587d16a8c8fc9453e147c8708d6f006ffbb Mon Sep 17 00:00:00 2001
+From: Bjarni Jonasson <bjarni.jonasson@microchip.com>
+Date: Wed, 13 Jan 2021 12:56:25 +0100
+Subject: [PATCH] net: phy: Add 100 base-x mode
+
+Sparx-5 supports this mode and it is missing in the PHY core.
+
+Signed-off-by: Bjarni Jonasson <bjarni.jonasson@microchip.com>
+Reviewed-by: Russell King <rmk+kernel@armlinux.org.uk>
+Signed-off-by: Jakub Kicinski <kuba@kernel.org>
+---
+ Documentation/networking/phy.rst | 5 +++++
+ include/linux/phy.h              | 4 ++++
+ 2 files changed, 9 insertions(+)
+
+--- a/Documentation/networking/phy.rst
++++ b/Documentation/networking/phy.rst
+@@ -286,6 +286,11 @@ Some of the interface modes are describe
+     Note: due to legacy usage, some 10GBASE-R usage incorrectly makes
+     use of this definition.
+ 
++``PHY_INTERFACE_MODE_100BASEX``
++    This defines IEEE 802.3 Clause 24.  The link operates at a fixed data
++    rate of 125Mpbs using a 4B/5B encoding scheme, resulting in an underlying
++    data rate of 100Mpbs.
++
+ Pause frames / flow control
+ ===========================
+ 
+--- a/include/linux/phy.h
++++ b/include/linux/phy.h
+@@ -104,6 +104,7 @@ extern const int phy_10gbit_features_arr
+  * @PHY_INTERFACE_MODE_MOCA: Multimedia over Coax
+  * @PHY_INTERFACE_MODE_QSGMII: Quad SGMII
+  * @PHY_INTERFACE_MODE_TRGMII: Turbo RGMII
++ * @PHY_INTERFACE_MODE_100BASEX: 100 BaseX
+  * @PHY_INTERFACE_MODE_1000BASEX: 1000 BaseX
+  * @PHY_INTERFACE_MODE_2500BASEX: 2500 BaseX
+  * @PHY_INTERFACE_MODE_RXAUI: Reduced XAUI
+@@ -135,6 +136,7 @@ typedef enum {
+ 	PHY_INTERFACE_MODE_MOCA,
+ 	PHY_INTERFACE_MODE_QSGMII,
+ 	PHY_INTERFACE_MODE_TRGMII,
++	PHY_INTERFACE_MODE_100BASEX,
+ 	PHY_INTERFACE_MODE_1000BASEX,
+ 	PHY_INTERFACE_MODE_2500BASEX,
+ 	PHY_INTERFACE_MODE_RXAUI,
+@@ -217,6 +219,8 @@ static inline const char *phy_modes(phy_
+ 		return "usxgmii";
+ 	case PHY_INTERFACE_MODE_10GKR:
+ 		return "10gbase-kr";
++	case PHY_INTERFACE_MODE_100BASEX:
++		return "100base-x";
+ 	default:
+ 		return "unknown";
+ 	}
diff --git a/target/linux/generic/backport-5.10/741-v5.12-sfp-add-support-for-100-base-x-SFPs.patch b/target/linux/generic/backport-5.10/741-v5.12-sfp-add-support-for-100-base-x-SFPs.patch
new file mode 100644
index 0000000000..7d06c235d9
--- /dev/null
+++ b/target/linux/generic/backport-5.10/741-v5.12-sfp-add-support-for-100-base-x-SFPs.patch
@@ -0,0 +1,40 @@
+From 6e12f35cef6b8a458d7ecf507ae330e0bffaad8c Mon Sep 17 00:00:00 2001
+From: Bjarni Jonasson <bjarni.jonasson@microchip.com>
+Date: Wed, 13 Jan 2021 12:56:26 +0100
+Subject: [PATCH] sfp: add support for 100 base-x SFPs
+
+Add support for 100Base-FX, 100Base-LX, 100Base-PX and 100Base-BX10 modules
+This is needed for Sparx-5 switch.
+
+Signed-off-by: Bjarni Jonasson <bjarni.jonasson@microchip.com>
+Reviewed-by: Russell King <rmk+kernel@armlinux.org.uk>
+Signed-off-by: Jakub Kicinski <kuba@kernel.org>
+---
+ drivers/net/phy/sfp-bus.c | 9 +++++++++
+ 1 file changed, 9 insertions(+)
+
+--- a/drivers/net/phy/sfp-bus.c
++++ b/drivers/net/phy/sfp-bus.c
+@@ -280,6 +280,12 @@ void sfp_parse_support(struct sfp_bus *b
+ 	    br_min <= 1300 && br_max >= 1200)
+ 		phylink_set(modes, 1000baseX_Full);
+ 
++	/* 100Base-FX, 100Base-LX, 100Base-PX, 100Base-BX10 */
++	if (id->base.e100_base_fx || id->base.e100_base_lx)
++		phylink_set(modes, 100baseFX_Full);
++	if ((id->base.e_base_px || id->base.e_base_bx10) && br_nom == 100)
++		phylink_set(modes, 100baseFX_Full);
++
+ 	/* For active or passive cables, select the link modes
+ 	 * based on the bit rates and the cable compliance bytes.
+ 	 */
+@@ -399,6 +405,9 @@ phy_interface_t sfp_select_interface(str
+ 	if (phylink_test(link_modes, 1000baseX_Full))
+ 		return PHY_INTERFACE_MODE_1000BASEX;
+ 
++	if (phylink_test(link_modes, 100baseFX_Full))
++		return PHY_INTERFACE_MODE_100BASEX;
++
+ 	dev_warn(bus->sfp_dev, "Unable to ascertain link mode\n");
+ 
+ 	return PHY_INTERFACE_MODE_NA;