This is a note to let you know that I've just added the patch titled
net: phy: marvell10g: fix differentiation of 88X3310 from 88X3340
to the 5.13-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
net-phy-marvell10g-fix-differentiation-of-88x3310-fr.patch
and it can be found in the queue-5.13 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit dbe1079d0d2698e54884986a4a5d156ceef654cb
Author: Marek Behún <kabel@xxxxxxxxxx>
Date: Sun Jul 11 18:38:15 2021 +0200
net: phy: marvell10g: fix differentiation of 88X3310 from 88X3340
[ Upstream commit a5de4be0aaaa66a2fa98e8a33bdbed3bd0682804 ]
It seems that we cannot differentiate 88X3310 from 88X3340 by simply
looking at bit 3 of revision ID. This only works on revisions A0 and A1.
On revision B0, this bit is always 1.
Instead use the 3.d00d register for differentiation, since this register
contains information about number of ports on the device.
Fixes: 9885d016ffa9 ("net: phy: marvell10g: add separate structure for 88X3340")
Signed-off-by: Marek Behún <kabel@xxxxxxxxxx>
Reported-by: Matteo Croce <mcroce@xxxxxxxxxxxxxxxxxxx>
Tested-by: Matteo Croce <mcroce@xxxxxxxxxxxxx>
Signed-off-by: David S. Miller <davem@xxxxxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/net/phy/marvell10g.c b/drivers/net/phy/marvell10g.c
index bbbc6ac8fa82..53a433442803 100644
--- a/drivers/net/phy/marvell10g.c
+++ b/drivers/net/phy/marvell10g.c
@@ -78,6 +78,11 @@ enum {
/* Temperature read register (88E2110 only) */
MV_PCS_TEMP = 0x8042,
+ /* Number of ports on the device */
+ MV_PCS_PORT_INFO = 0xd00d,
+ MV_PCS_PORT_INFO_NPORTS_MASK = 0x0380,
+ MV_PCS_PORT_INFO_NPORTS_SHIFT = 7,
+
/* These registers appear at 0x800X and 0xa00X - the 0xa00X control
* registers appear to set themselves to the 0x800X when AN is
* restarted, but status registers appear readable from either.
@@ -966,6 +971,30 @@ static const struct mv3310_chip mv2111_type = {
#endif
};
+static int mv3310_get_number_of_ports(struct phy_device *phydev)
+{
+ int ret;
+
+ ret = phy_read_mmd(phydev, MDIO_MMD_PCS, MV_PCS_PORT_INFO);
+ if (ret < 0)
+ return ret;
+
+ ret &= MV_PCS_PORT_INFO_NPORTS_MASK;
+ ret >>= MV_PCS_PORT_INFO_NPORTS_SHIFT;
+
+ return ret + 1;
+}
+
+static int mv3310_match_phy_device(struct phy_device *phydev)
+{
+ return mv3310_get_number_of_ports(phydev) == 1;
+}
+
+static int mv3340_match_phy_device(struct phy_device *phydev)
+{
+ return mv3310_get_number_of_ports(phydev) == 4;
+}
+
static int mv211x_match_phy_device(struct phy_device *phydev, bool has_5g)
{
int val;
@@ -994,7 +1023,8 @@ static int mv2111_match_phy_device(struct phy_device *phydev)
static struct phy_driver mv3310_drivers[] = {
{
.phy_id = MARVELL_PHY_ID_88X3310,
- .phy_id_mask = MARVELL_PHY_ID_88X33X0_MASK,
+ .phy_id_mask = MARVELL_PHY_ID_MASK,
+ .match_phy_device = mv3310_match_phy_device,
.name = "mv88x3310",
.driver_data = &mv3310_type,
.get_features = mv3310_get_features,
@@ -1011,8 +1041,9 @@ static struct phy_driver mv3310_drivers[] = {
.set_loopback = genphy_c45_loopback,
},
{
- .phy_id = MARVELL_PHY_ID_88X3340,
- .phy_id_mask = MARVELL_PHY_ID_88X33X0_MASK,
+ .phy_id = MARVELL_PHY_ID_88X3310,
+ .phy_id_mask = MARVELL_PHY_ID_MASK,
+ .match_phy_device = mv3340_match_phy_device,
.name = "mv88x3340",
.driver_data = &mv3340_type,
.get_features = mv3310_get_features,
@@ -1069,8 +1100,7 @@ static struct phy_driver mv3310_drivers[] = {
module_phy_driver(mv3310_drivers);
static struct mdio_device_id __maybe_unused mv3310_tbl[] = {
- { MARVELL_PHY_ID_88X3310, MARVELL_PHY_ID_88X33X0_MASK },
- { MARVELL_PHY_ID_88X3340, MARVELL_PHY_ID_88X33X0_MASK },
+ { MARVELL_PHY_ID_88X3310, MARVELL_PHY_ID_MASK },
{ MARVELL_PHY_ID_88E2110, MARVELL_PHY_ID_MASK },
{ },
};
diff --git a/include/linux/marvell_phy.h b/include/linux/marvell_phy.h
index acee44b9db26..0f06c2287b52 100644
--- a/include/linux/marvell_phy.h
+++ b/include/linux/marvell_phy.h
@@ -22,14 +22,10 @@
#define MARVELL_PHY_ID_88E1545 0x01410ea0
#define MARVELL_PHY_ID_88E1548P 0x01410ec0
#define MARVELL_PHY_ID_88E3016 0x01410e60
+#define MARVELL_PHY_ID_88X3310 0x002b09a0
#define MARVELL_PHY_ID_88E2110 0x002b09b0
#define MARVELL_PHY_ID_88X2222 0x01410f10
-/* PHY IDs and mask for Alaska 10G PHYs */
-#define MARVELL_PHY_ID_88X33X0_MASK 0xfffffff8
-#define MARVELL_PHY_ID_88X3310 0x002b09a0
-#define MARVELL_PHY_ID_88X3340 0x002b09a8
-
/* Marvel 88E1111 in Finisar SFP module with modified PHY ID */
#define MARVELL_PHY_ID_88E1111_FINISAR 0x01ff0cc0
