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Diffstat (limited to 'target/linux/mvebu/patches-4.9/450-reprobe_sfp_phy.patch')
-rw-r--r--target/linux/mvebu/patches-4.9/450-reprobe_sfp_phy.patch119
1 files changed, 119 insertions, 0 deletions
diff --git a/target/linux/mvebu/patches-4.9/450-reprobe_sfp_phy.patch b/target/linux/mvebu/patches-4.9/450-reprobe_sfp_phy.patch
new file mode 100644
index 0000000..69eaa37
--- /dev/null
+++ b/target/linux/mvebu/patches-4.9/450-reprobe_sfp_phy.patch
@@ -0,0 +1,119 @@
+From 28baa5e2635285b178326b301f534ed95c65dd01 Mon Sep 17 00:00:00 2001
+From: Jonas Gorski <jonas.gorski@gmail.com>
+Date: Thu, 29 Sep 2016 11:44:39 +0200
+Subject: [PATCH] sfp: retry phy probe if unsuccessful
+
+Some phys seem to take longer than 50 ms to come out of reset, so retry
+until we find a phy.
+
+Signed-off-by: Jonas Gorski <jonas.gorski@gmail.com>
+---
+ drivers/net/phy/sfp.c | 38 +++++++++++++++++++++++++-------------
+ 1 file changed, 25 insertions(+), 13 deletions(-)
+
+--- a/drivers/net/phy/sfp.c
++++ b/drivers/net/phy/sfp.c
+@@ -491,7 +491,7 @@ static void sfp_sm_phy_detach(struct sfp
+ sfp->mod_phy = NULL;
+ }
+
+-static void sfp_sm_probe_phy(struct sfp *sfp)
++static int sfp_sm_probe_phy(struct sfp *sfp)
+ {
+ struct phy_device *phy;
+ int err;
+@@ -500,12 +500,12 @@ static void sfp_sm_probe_phy(struct sfp
+
+ phy = mdiobus_scan(sfp->i2c_mii, SFP_PHY_ADDR);
+ if (IS_ERR(phy)) {
++ if (PTR_ERR(phy) == -ENODEV) {
++ dev_dbg(sfp->dev, "no PHY detected\n");
++ return -EAGAIN;
++ }
+ dev_err(sfp->dev, "mdiobus scan returned %ld\n", PTR_ERR(phy));
+- return;
+- }
+- if (!phy) {
+- dev_info(sfp->dev, "no PHY detected\n");
+- return;
++ return PTR_ERR(phy);
+ }
+
+ if (sfp->phylink) {
+@@ -515,12 +515,14 @@ static void sfp_sm_probe_phy(struct sfp
+ phy_device_free(phy);
+ dev_err(sfp->dev, "phylink_connect_phy failed: %d\n",
+ err);
+- return;
++ return err;
+ }
+ }
+
+ sfp->mod_phy = phy;
+ phy_start(phy);
++
++ return 0;
+ }
+
+ static void sfp_sm_link_up(struct sfp *sfp)
+@@ -569,30 +571,41 @@ static void sfp_sm_fault(struct sfp *sfp
+
+ static void sfp_sm_mod_init(struct sfp *sfp)
+ {
++ int ret = 0;
++
+ sfp_module_tx_enable(sfp);
+
+- /* Wait t_init before indicating that the link is up, provided the
+- * current state indicates no TX_FAULT. If TX_FAULT clears before
+- * this time, that's fine too.
+- */
+- sfp_sm_next(sfp, SFP_S_INIT, T_INIT_JIFFIES);
+- sfp->sm_retries = 5;
++ if (!sfp->phylink)
++ return;
+
+- if (sfp->phylink) {
+- /* Setting the serdes link mode is guesswork: there's no
+- * field in the EEPROM which indicates what mode should
+- * be used.
+- *
+- * If it's a gigabit-only fiber module, it probably does
+- * not have a PHY, so switch to 802.3z negotiation mode.
+- * Otherwise, switch to SGMII mode (which is required to
+- * support non-gigabit speeds) and probe for a PHY.
++ /* Setting the serdes link mode is guesswork: there's no
++ * field in the EEPROM which indicates what mode should
++ * be used.
++ *
++ * If it's a gigabit-only fiber module, it probably does
++ * not have a PHY, so switch to 802.3z negotiation mode.
++ * Otherwise, switch to SGMII mode (which is required to
++ * support non-gigabit speeds) and probe for a PHY.
++ */
++ if (sfp->id.base.e1000_base_t ||
++ sfp->id.base.e100_base_lx ||
++ sfp->id.base.e100_base_fx)
++ ret = sfp_sm_probe_phy(sfp);
++
++ if (!ret) {
++ /* Wait t_init before indicating that the link is up, provided
++ * the current state indicates no TX_FAULT. If TX_FAULT clears
++ * this time, that's fine too.
+ */
+- if (sfp->id.base.e1000_base_t ||
+- sfp->id.base.e100_base_lx ||
+- sfp->id.base.e100_base_fx)
+- sfp_sm_probe_phy(sfp);
++ sfp_sm_next(sfp, SFP_S_INIT, T_INIT_JIFFIES);
++ sfp->sm_retries = 5;
++ return;
+ }
++
++ if (ret == -EAGAIN)
++ sfp_sm_set_timer(sfp, T_PROBE_RETRY);
++ else
++ sfp_sm_next(sfp, SFP_S_TX_DISABLE, 0);
+ }
+
+ static int sfp_sm_mod_probe(struct sfp *sfp)