diff options
Diffstat (limited to 'target/linux/generic/pending-5.4/759-net-sfp-re-attempt-probing-for-phy.patch')
| -rw-r--r-- | target/linux/generic/pending-5.4/759-net-sfp-re-attempt-probing-for-phy.patch | 132 |
1 files changed, 0 insertions, 132 deletions
diff --git a/target/linux/generic/pending-5.4/759-net-sfp-re-attempt-probing-for-phy.patch b/target/linux/generic/pending-5.4/759-net-sfp-re-attempt-probing-for-phy.patch deleted file mode 100644 index aebb6b0398..0000000000 --- a/target/linux/generic/pending-5.4/759-net-sfp-re-attempt-probing-for-phy.patch +++ /dev/null @@ -1,132 +0,0 @@ -From 6c4efe83a0acf6f06c89ae17b885fa5739eb5be7 Mon Sep 17 00:00:00 2001 -From: Russell King <rmk+kernel@armlinux.org.uk> -Date: Mon, 2 Dec 2019 18:20:22 +0000 -Subject: [PATCH 4/4] net: sfp: re-attempt probing for phy - -Some 1000BASE-T PHY modules take a while for the PHY to wake up. -Retry the probe a number of times before deciding that the module has -no PHY. - -Tested with: - Sourcephotonics SPGBTXCNFC - PHY takes less than 50ms to respond. - Champion One 1000SFPT - PHY takes about 200ms to respond. - Mikrotik S-RJ01 - no PHY - -Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> ---- - drivers/net/phy/sfp.c | 59 ++++++++++++++++++++++++++++++++++++--------------- - 1 file changed, 42 insertions(+), 17 deletions(-) - ---- a/drivers/net/phy/sfp.c -+++ b/drivers/net/phy/sfp.c -@@ -62,6 +62,7 @@ enum { - SFP_S_FAIL, - SFP_S_WAIT, - SFP_S_INIT, -+ SFP_S_INIT_PHY, - SFP_S_INIT_TX_FAULT, - SFP_S_WAIT_LOS, - SFP_S_LINK_UP, -@@ -126,6 +127,7 @@ static const char * const sm_state_strin - [SFP_S_FAIL] = "fail", - [SFP_S_WAIT] = "wait", - [SFP_S_INIT] = "init", -+ [SFP_S_INIT_PHY] = "init_phy", - [SFP_S_INIT_TX_FAULT] = "init_tx_fault", - [SFP_S_WAIT_LOS] = "wait_los", - [SFP_S_LINK_UP] = "link_up", -@@ -180,6 +182,12 @@ static const enum gpiod_flags gpio_flags - #define N_FAULT_INIT 5 - #define N_FAULT 5 - -+/* T_PHY_RETRY is the time interval between attempts to probe the PHY. -+ * R_PHY_RETRY is the number of attempts. -+ */ -+#define T_PHY_RETRY msecs_to_jiffies(50) -+#define R_PHY_RETRY 12 -+ - /* 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 - * connect before the I2C bus on MOD DEF 1/2. -@@ -236,6 +244,7 @@ struct sfp { - unsigned char sm_dev_state; - unsigned short sm_state; - unsigned char sm_fault_retries; -+ unsigned char sm_phy_retries; - - struct sfp_eeprom_id id; - unsigned int module_power_mW; -@@ -1432,10 +1441,8 @@ static int sfp_sm_probe_phy(struct sfp * - int err; - - phy = get_phy_device(sfp->i2c_mii, SFP_PHY_ADDR, is_c45); -- if (phy == ERR_PTR(-ENODEV)) { -- dev_info(sfp->dev, "no PHY detected\n"); -- return 0; -- } -+ if (phy == ERR_PTR(-ENODEV)) -+ return PTR_ERR(phy); - if (IS_ERR(phy)) { - dev_err(sfp->dev, "mdiobus scan returned %ld\n", PTR_ERR(phy)); - return PTR_ERR(phy); -@@ -1954,6 +1961,7 @@ static void sfp_sm_module(struct sfp *sf - static void sfp_sm_main(struct sfp *sfp, unsigned int event) - { - unsigned long timeout; -+ int ret; - - /* Some events are global */ - if (sfp->sm_state != SFP_S_DOWN && -@@ -2027,22 +2035,39 @@ static void sfp_sm_main(struct sfp *sfp, - sfp_sm_fault(sfp, SFP_S_INIT_TX_FAULT, - sfp->sm_fault_retries == N_FAULT_INIT); - } else if (event == SFP_E_TIMEOUT || event == SFP_E_TX_CLEAR) { -- init_done: /* TX_FAULT deasserted or we timed out with TX_FAULT -- * clear. Probe for the PHY and check the LOS state. -- */ -- if (sfp_sm_probe_for_phy(sfp)) { -- sfp_sm_next(sfp, SFP_S_FAIL, 0); -- break; -- } -- if (sfp_module_start(sfp->sfp_bus)) { -- sfp_sm_next(sfp, SFP_S_FAIL, 0); -+ init_done: -+ sfp->sm_phy_retries = R_PHY_RETRY; -+ goto phy_probe; -+ } -+ break; -+ -+ case SFP_S_INIT_PHY: -+ if (event != SFP_E_TIMEOUT) -+ break; -+ phy_probe: -+ /* TX_FAULT deasserted or we timed out with TX_FAULT -+ * clear. Probe for the PHY and check the LOS state. -+ */ -+ ret = sfp_sm_probe_for_phy(sfp); -+ if (ret == -ENODEV) { -+ if (--sfp->sm_phy_retries) { -+ sfp_sm_next(sfp, SFP_S_INIT_PHY, T_PHY_RETRY); - break; -+ } else { -+ dev_info(sfp->dev, "no PHY detected\n"); - } -- sfp_sm_link_check_los(sfp); -- -- /* Reset the fault retry count */ -- sfp->sm_fault_retries = N_FAULT; -+ } else if (ret) { -+ sfp_sm_next(sfp, SFP_S_FAIL, 0); -+ break; - } -+ if (sfp_module_start(sfp->sfp_bus)) { -+ sfp_sm_next(sfp, SFP_S_FAIL, 0); -+ break; -+ } -+ sfp_sm_link_check_los(sfp); -+ -+ /* Reset the fault retry count */ -+ sfp->sm_fault_retries = N_FAULT; - break; - - case SFP_S_INIT_TX_FAULT: |