mirror of
https://github.com/openwrt/openwrt.git
synced 2024-12-22 15:02:32 +00:00
66 lines
2.5 KiB
Diff
66 lines
2.5 KiB
Diff
|
From dca678b8838945572cf50584cb33a7199c1fd397 Mon Sep 17 00:00:00 2001
|
||
|
|
From: Russell King <rmk+kernel@armlinux.org.uk>
|
||
|
|
Date: Thu, 17 Oct 2019 00:24:18 +0100
|
||
|
|
Subject: [PATCH 624/660] net: sfp: avoid power switch on address-change
|
||
|
|
modules
|
||
|
|
|
||
|
|
If the module indicates that it requires an address change sequence to
|
||
|
|
switch between address 0x50 and 0x51, which we don't support, we can't
|
||
|
|
write to the register that controls the power mode to switch to high
|
||
|
|
power mode. Warn the user that the module may not be functional in
|
||
|
|
this case, and don't try to change the power mode.
|
||
|
|
|
||
|
|
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
|
||
|
|
---
|
||
|
|
drivers/net/phy/sfp.c | 31 ++++++++++++++++++++-----------
|
||
|
|
1 file changed, 20 insertions(+), 11 deletions(-)
|
||
|
|
|
||
|
|
--- a/drivers/net/phy/sfp.c
|
||
|
|
+++ b/drivers/net/phy/sfp.c
|
||
|
|
@@ -1320,25 +1320,34 @@ static int sfp_module_parse_power(struct
|
||
|
|
if (sfp->id.ext.options & cpu_to_be16(SFP_OPTIONS_HIGH_POWER_LEVEL))
|
||
|
|
power_mW = 2000;
|
||
|
|
|
||
|
|
- if (sfp->id.ext.sff8472_compliance == SFP_SFF8472_COMPLIANCE_NONE &&
|
||
|
|
- (sfp->id.ext.diagmon & (SFP_DIAGMON_DDM | SFP_DIAGMON_ADDRMODE)) !=
|
||
|
|
- SFP_DIAGMON_DDM) {
|
||
|
|
- /* The module appears not to implement bus address 0xa2,
|
||
|
|
- * or requires an address change sequence, so assume that
|
||
|
|
- * the module powers up in the indicated power mode.
|
||
|
|
- */
|
||
|
|
- if (power_mW > sfp->max_power_mW) {
|
||
|
|
+ if (power_mW > sfp->max_power_mW) {
|
||
|
|
+ /* Module power specification exceeds the allowed maximum. */
|
||
|
|
+ if (sfp->id.ext.sff8472_compliance ==
|
||
|
|
+ SFP_SFF8472_COMPLIANCE_NONE &&
|
||
|
|
+ !(sfp->id.ext.diagmon & SFP_DIAGMON_DDM)) {
|
||
|
|
+ /* The module appears not to implement bus address
|
||
|
|
+ * 0xa2, so assume that the module powers up in the
|
||
|
|
+ * indicated mode.
|
||
|
|
+ */
|
||
|
|
dev_err(sfp->dev,
|
||
|
|
"Host does not support %u.%uW modules\n",
|
||
|
|
power_mW / 1000, (power_mW / 100) % 10);
|
||
|
|
return -EINVAL;
|
||
|
|
+ } else {
|
||
|
|
+ dev_warn(sfp->dev,
|
||
|
|
+ "Host does not support %u.%uW modules, module left in power mode 1\n",
|
||
|
|
+ power_mW / 1000, (power_mW / 100) % 10);
|
||
|
|
+ return 0;
|
||
|
|
}
|
||
|
|
- return 0;
|
||
|
|
}
|
||
|
|
|
||
|
|
- if (power_mW > sfp->max_power_mW) {
|
||
|
|
+ /* If the module requires a higher power mode, but also requires
|
||
|
|
+ * an address change sequence, warn the user that the module may
|
||
|
|
+ * not be functional.
|
||
|
|
+ */
|
||
|
|
+ if (sfp->id.ext.diagmon & SFP_DIAGMON_ADDRMODE && power_mW > 1000) {
|
||
|
|
dev_warn(sfp->dev,
|
||
|
|
- "Host does not support %u.%uW modules, module left in power mode 1\n",
|
||
|
|
+ "Address Change Sequence not supported but module requies %u.%uW, module may not be functional\n",
|
||
|
|
power_mW / 1000, (power_mW / 100) % 10);
|
||
|
|
return 0;
|
||
|
|
}
|