mirror of https://github.com/hak5/openwrt.git
109 lines
3.7 KiB
Diff
109 lines
3.7 KiB
Diff
From 283b211aa01bdae94dffb3121655dbb20bf237f4 Mon Sep 17 00:00:00 2001
|
|
From: Russell King <rmk+kernel@armlinux.org.uk>
|
|
Date: Tue, 3 Dec 2019 15:22:05 +0000
|
|
Subject: net: sfp: avoid tx-fault with Nokia GPON module
|
|
|
|
The Nokia GPON module can hold tx-fault active while it is initialising
|
|
which can take up to 60s. Avoid this causing the module to be declared
|
|
faulty after the SFP MSA defined non-cooled module timeout.
|
|
|
|
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
|
|
---
|
|
drivers/net/phy/sfp.c | 42 ++++++++++++++++++++++++++++++------------
|
|
1 file changed, 30 insertions(+), 12 deletions(-)
|
|
|
|
--- a/drivers/net/phy/sfp.c
|
|
+++ b/drivers/net/phy/sfp.c
|
|
@@ -153,10 +153,20 @@ static const enum gpiod_flags gpio_flags
|
|
GPIOD_ASIS,
|
|
};
|
|
|
|
-#define T_WAIT msecs_to_jiffies(50)
|
|
-#define T_INIT_JIFFIES msecs_to_jiffies(300)
|
|
-#define T_RESET_US 10
|
|
-#define T_FAULT_RECOVER msecs_to_jiffies(1000)
|
|
+/* t_start_up (SFF-8431) or t_init (SFF-8472) is the time required for a
|
|
+ * non-cooled module to initialise its laser safety circuitry. We wait
|
|
+ * an initial T_WAIT period before we check the tx fault to give any PHY
|
|
+ * on board (for a copper SFP) time to initialise.
|
|
+ */
|
|
+#define T_WAIT msecs_to_jiffies(50)
|
|
+#define T_START_UP msecs_to_jiffies(300)
|
|
+#define T_START_UP_BAD_GPON msecs_to_jiffies(60000)
|
|
+
|
|
+/* t_reset is the time required to assert the TX_DISABLE signal to reset
|
|
+ * an indicated TX_FAULT.
|
|
+ */
|
|
+#define T_RESET_US 10
|
|
+#define T_FAULT_RECOVER msecs_to_jiffies(1000)
|
|
|
|
/* SFP module presence detection is poor: the three MOD DEF signals are
|
|
* the same length on the PCB, which means it's possible for MOD DEF 0 to
|
|
@@ -216,6 +226,7 @@ struct sfp {
|
|
|
|
struct sfp_eeprom_id id;
|
|
unsigned int module_power_mW;
|
|
+ unsigned int module_t_start_up;
|
|
|
|
#if IS_ENABLED(CONFIG_HWMON)
|
|
struct sfp_diag diag;
|
|
@@ -1590,6 +1601,12 @@ static int sfp_sm_mod_probe(struct sfp *
|
|
if (ret < 0)
|
|
return ret;
|
|
|
|
+ if (!memcmp(id.base.vendor_name, "ALCATELLUCENT ", 16) &&
|
|
+ !memcmp(id.base.vendor_pn, "3FE46541AA ", 16))
|
|
+ sfp->module_t_start_up = T_START_UP_BAD_GPON;
|
|
+ else
|
|
+ sfp->module_t_start_up = T_START_UP;
|
|
+
|
|
return 0;
|
|
}
|
|
|
|
@@ -1795,11 +1812,12 @@ static void sfp_sm_main(struct sfp *sfp,
|
|
break;
|
|
|
|
if (sfp->state & SFP_F_TX_FAULT) {
|
|
- /* 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.
|
|
+ /* Wait up to t_init (SFF-8472) or t_start_up (SFF-8431)
|
|
+ * from the TX_DISABLE deassertion for the module to
|
|
+ * initialise, which is indicated by TX_FAULT
|
|
+ * deasserting.
|
|
*/
|
|
- timeout = T_INIT_JIFFIES;
|
|
+ timeout = sfp->module_t_start_up;
|
|
if (timeout > T_WAIT)
|
|
timeout -= T_WAIT;
|
|
else
|
|
@@ -1816,8 +1834,8 @@ static void sfp_sm_main(struct sfp *sfp,
|
|
|
|
case SFP_S_INIT:
|
|
if (event == SFP_E_TIMEOUT && sfp->state & SFP_F_TX_FAULT) {
|
|
- /* TX_FAULT is still asserted after t_init, so assume
|
|
- * there is a fault.
|
|
+ /* TX_FAULT is still asserted after t_init or
|
|
+ * or t_start_up, so assume there is a fault.
|
|
*/
|
|
sfp_sm_fault(sfp, SFP_S_INIT_TX_FAULT,
|
|
sfp->sm_retries == 5);
|
|
@@ -1836,7 +1854,7 @@ static void sfp_sm_main(struct sfp *sfp,
|
|
case SFP_S_INIT_TX_FAULT:
|
|
if (event == SFP_E_TIMEOUT) {
|
|
sfp_module_tx_fault_reset(sfp);
|
|
- sfp_sm_next(sfp, SFP_S_INIT, T_INIT_JIFFIES);
|
|
+ sfp_sm_next(sfp, SFP_S_INIT, sfp->module_t_start_up);
|
|
}
|
|
break;
|
|
|
|
@@ -1860,7 +1878,7 @@ static void sfp_sm_main(struct sfp *sfp,
|
|
case SFP_S_TX_FAULT:
|
|
if (event == SFP_E_TIMEOUT) {
|
|
sfp_module_tx_fault_reset(sfp);
|
|
- sfp_sm_next(sfp, SFP_S_REINIT, T_INIT_JIFFIES);
|
|
+ sfp_sm_next(sfp, SFP_S_REINIT, sfp->module_t_start_up);
|
|
}
|
|
break;
|
|
|