This patch series add generic workaround for reading EEPROM content from broken GPON SFP modules based on Realtek RTL8672/RTL9601C chips and add another workarounds for GPON SFP module Ubiquiti U-Fiber Instant.
GPON SFP modules based on Realtek RTL8672/RTL9601C chips do not have a real EEPROM but rather EEPROM emulator which is broken and needs special hack for reading its content. SFP module detection is done based on EEPROM content. But we obviously cannot read EEPROM correctly if we do not know what type of connected SFP module... And to have this chicken and egg problem more complicated, GPON vendors generally put garbage into their EEPROM content so even with knowing EEPROM content we do not know what kind of broken SFP is connected... Workaround for Realtek RTL8672/RTL9601C based modules is therefore done based on broken EEPROM reading characteristic. This patch series also available in my git branch sfp-rtl8672: https://git.kernel.org/pub/scm/linux/kernel/git/pali/linux.git/log/?h=sfp-rtl8672 Pali Rohár (4): net: sfp: add workaround for Realtek RTL8672 and RTL9601C chips net: sfp: allow to use also SFP modules which are detected as SFF net: sfp: assume that LOS is not implemented if both LOS normal and inverted is set net: sfp: add mode quirk for GPON module Ubiquiti U-Fiber Instant drivers/net/phy/sfp-bus.c | 15 +++++ drivers/net/phy/sfp.c | 117 ++++++++++++++++++++++---------------- 2 files changed, 83 insertions(+), 49 deletions(-) -- 2.20.1
