diff options
| author | Marek Behún <kabel@kernel.org> | 2023-12-19 17:24:15 +0100 |
|---|---|---|
| committer | David S. Miller <davem@davemloft.net> | 2023-12-25 06:20:14 +0000 |
| commit | e9301af385e7864dea353f5e58cad7339dd6c718 (patch) | |
| tree | 8cb378d8ad218f261c9cf40f772210d6c56a35be | |
| parent | 3b83fa94cf316aaf9ad9a367ac8031a06d31649b (diff) | |
net: sfp: fix PHY discovery for FS SFP-10G-T module
Commit 2f3ce7a56c6e ("net: sfp: rework the RollBall PHY waiting code")
changed the long wait before accessing RollBall / FS modules into
probing for PHY every 1 second, and trying 25 times.
Wei Lei reports that this does not work correctly on FS modules: when
initializing, they may report values different from 0xffff in PHY ID
registers for some MMDs, causing get_phy_c45_ids() to find some bogus
MMD.
Fix this by adding the module_t_wait member back, and setting it to 4
seconds for FS modules.
Fixes: 2f3ce7a56c6e ("net: sfp: rework the RollBall PHY waiting code")
Reported-by: Wei Lei <quic_leiwei@quicinc.com>
Signed-off-by: Marek Behún <kabel@kernel.org>
Tested-by: Lei Wei <quic_leiwei@quicinc.com>
Reviewed-by: Andrew Lunn <andrew@lunn.ch>
Signed-off-by: David S. Miller <davem@davemloft.net>
| -rw-r--r-- | drivers/net/phy/sfp.c | 17 |
1 files changed, 13 insertions, 4 deletions
diff --git a/drivers/net/phy/sfp.c b/drivers/net/phy/sfp.c index 3780a96d2caa..f75c9eb3958e 100644 --- a/drivers/net/phy/sfp.c +++ b/drivers/net/phy/sfp.c @@ -274,6 +274,7 @@ struct sfp { struct sfp_eeprom_id id; unsigned int module_power_mW; unsigned int module_t_start_up; + unsigned int module_t_wait; unsigned int phy_t_retry; unsigned int rate_kbd; @@ -388,6 +389,12 @@ static void sfp_fixup_fs_10gt(struct sfp *sfp) { sfp_fixup_10gbaset_30m(sfp); sfp_fixup_rollball(sfp); + + /* The RollBall fixup is not enough for FS modules, the AQR chip inside + * them does not return 0xffff for PHY ID registers in all MMDs for the + * while initializing. They need a 4 second wait before accessing PHY. + */ + sfp->module_t_wait = msecs_to_jiffies(4000); } static void sfp_fixup_halny_gsfp(struct sfp *sfp) @@ -2329,6 +2336,7 @@ static int sfp_sm_mod_probe(struct sfp *sfp, bool report) mask |= SFP_F_RS1; sfp->module_t_start_up = T_START_UP; + sfp->module_t_wait = T_WAIT; sfp->phy_t_retry = T_PHY_RETRY; sfp->state_ignore_mask = 0; @@ -2566,9 +2574,10 @@ static void sfp_sm_main(struct sfp *sfp, unsigned int event) /* We need to check the TX_FAULT state, which is not defined * while TX_DISABLE is asserted. The earliest we want to do - * anything (such as probe for a PHY) is 50ms. + * anything (such as probe for a PHY) is 50ms (or more on + * specific modules). */ - sfp_sm_next(sfp, SFP_S_WAIT, T_WAIT); + sfp_sm_next(sfp, SFP_S_WAIT, sfp->module_t_wait); break; case SFP_S_WAIT: @@ -2582,8 +2591,8 @@ static void sfp_sm_main(struct sfp *sfp, unsigned int event) * deasserting. */ timeout = sfp->module_t_start_up; - if (timeout > T_WAIT) - timeout -= T_WAIT; + if (timeout > sfp->module_t_wait) + timeout -= sfp->module_t_wait; else timeout = 1; |