diff options
Diffstat (limited to 'target/linux/generic/backport-4.19/735-v5.5-net-sfp-allow-sfp-to-probe-slow-to-initialise-GPON-m.patch')
| -rw-r--r-- | target/linux/generic/backport-4.19/735-v5.5-net-sfp-allow-sfp-to-probe-slow-to-initialise-GPON-m.patch | 110 |
1 files changed, 0 insertions, 110 deletions
diff --git a/target/linux/generic/backport-4.19/735-v5.5-net-sfp-allow-sfp-to-probe-slow-to-initialise-GPON-m.patch b/target/linux/generic/backport-4.19/735-v5.5-net-sfp-allow-sfp-to-probe-slow-to-initialise-GPON-m.patch deleted file mode 100644 index 6cbd0864f7..0000000000 --- a/target/linux/generic/backport-4.19/735-v5.5-net-sfp-allow-sfp-to-probe-slow-to-initialise-GPON-m.patch +++ /dev/null @@ -1,110 +0,0 @@ -From fb56cd08880aff8fb030e684fa4311bef712a499 Mon Sep 17 00:00:00 2001 -From: Russell King <rmk+kernel@armlinux.org.uk> -Date: Tue, 5 Nov 2019 13:02:30 +0000 -Subject: [PATCH 633/660] net: sfp: allow sfp to probe slow to initialise GPON - modules - -Some GPON modules (e.g. Huawei MA5671A) take a significant amount of -time to start responding on the I2C bus, contary to the SFF -specifications. - -Work around this by implementing a two-level timeout strategy, where -we initially quickly retry for the module, and then use a slower retry -after we exceed a maximum number of quick attempts. - -Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> ---- - drivers/net/phy/sfp.c | 38 ++++++++++++++++++++++++++++---------- - 1 file changed, 28 insertions(+), 10 deletions(-) - ---- a/drivers/net/phy/sfp.c -+++ b/drivers/net/phy/sfp.c -@@ -165,9 +165,12 @@ static const enum gpiod_flags gpio_flags - * The SFF-8472 specifies t_serial ("Time from power on until module is - * ready for data transmission over the two wire serial bus.") as 300ms. - */ --#define T_SERIAL msecs_to_jiffies(300) --#define T_HPOWER_LEVEL msecs_to_jiffies(300) --#define T_PROBE_RETRY msecs_to_jiffies(100) -+#define T_SERIAL msecs_to_jiffies(300) -+#define T_HPOWER_LEVEL msecs_to_jiffies(300) -+#define T_PROBE_RETRY_INIT msecs_to_jiffies(100) -+#define R_PROBE_RETRY_INIT 10 -+#define T_PROBE_RETRY_SLOW msecs_to_jiffies(5000) -+#define R_PROBE_RETRY_SLOW 12 - - /* SFP modules appear to always have their PHY configured for bus address - * 0x56 (which with mdio-i2c, translates to a PHY address of 22). -@@ -202,6 +205,8 @@ struct sfp { - struct delayed_work timeout; - struct mutex sm_mutex; /* Protects state machine */ - unsigned char sm_mod_state; -+ unsigned char sm_mod_tries_init; -+ unsigned char sm_mod_tries; - unsigned char sm_dev_state; - unsigned short sm_state; - unsigned int sm_retries; -@@ -1392,7 +1397,7 @@ static int sfp_sm_mod_hpower(struct sfp - return 0; - } - --static int sfp_sm_mod_probe(struct sfp *sfp) -+static int sfp_sm_mod_probe(struct sfp *sfp, bool report) - { - /* SFP module inserted - read I2C data */ - struct sfp_eeprom_id id; -@@ -1402,7 +1407,8 @@ static int sfp_sm_mod_probe(struct sfp * - - ret = sfp_read(sfp, false, 0, &id, sizeof(id)); - if (ret < 0) { -- dev_err(sfp->dev, "failed to read EEPROM: %d\n", ret); -+ if (report) -+ dev_err(sfp->dev, "failed to read EEPROM: %d\n", ret); - return -EAGAIN; - } - -@@ -1549,8 +1555,11 @@ static void sfp_sm_module(struct sfp *sf - - switch (sfp->sm_mod_state) { - default: -- if (event == SFP_E_INSERT) -+ if (event == SFP_E_INSERT) { - sfp_sm_mod_next(sfp, SFP_MOD_PROBE, T_SERIAL); -+ sfp->sm_mod_tries_init = R_PROBE_RETRY_INIT; -+ sfp->sm_mod_tries = R_PROBE_RETRY_SLOW; -+ } - break; - - case SFP_MOD_PROBE: -@@ -1558,10 +1567,19 @@ static void sfp_sm_module(struct sfp *sf - if (event != SFP_E_TIMEOUT) - break; - -- err = sfp_sm_mod_probe(sfp); -+ err = sfp_sm_mod_probe(sfp, sfp->sm_mod_tries == 1); - if (err == -EAGAIN) { -- sfp_sm_set_timer(sfp, T_PROBE_RETRY); -- break; -+ if (sfp->sm_mod_tries_init && -+ --sfp->sm_mod_tries_init) { -+ sfp_sm_set_timer(sfp, T_PROBE_RETRY_INIT); -+ break; -+ } else if (sfp->sm_mod_tries && --sfp->sm_mod_tries) { -+ if (sfp->sm_mod_tries == R_PROBE_RETRY_SLOW - 1) -+ dev_warn(sfp->dev, -+ "please wait, module slow to respond\n"); -+ sfp_sm_set_timer(sfp, T_PROBE_RETRY_SLOW); -+ break; -+ } - } - if (err < 0) { - sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); -@@ -1596,7 +1614,7 @@ static void sfp_sm_module(struct sfp *sf - sfp_module_remove(sfp->sfp_bus); - sfp_sm_mod_next(sfp, SFP_MOD_ERROR, 0); - } else { -- sfp_sm_set_timer(sfp, T_PROBE_RETRY); -+ sfp_sm_set_timer(sfp, T_PROBE_RETRY_INIT); - } - break; - } |