1. 13 Nov, 2020 1 commit
    • Reto Schneider's avatar
      rtlwifi: v88.2 firmware files for RTL8192CU · 2ea86675
      Reto Schneider authored
      
      
      The vendor driver rtl8188C_8192C_usb_linux_v4.0.1_6911.20130308 includes
      new firmware files. These were extracted from data statements in that
      driver to form these files.
      
      Before this update, with version 80 of the firmware, the USB interface
      of the RTL8192CU WLAN controller often locked itself up:
       usb 1-2: device descriptor read/64, error -110
       usb 1-2: device not accepting address 4, error -110
       usb 1-2: device not accepting address 5, error -110
       usb usb1-port2: unable to enumerate USB device
       usb 2-2: device descriptor read/64, error -110
       usb 2-2: device descriptor read/64, error -110
      
      On ARMv5 based GARDENA smart gateways running Linux 4.19.78, this can
      be reliably reproduced by rebooting (warm) the gateway multiple times
      (max. 50 attempts needed).
      Unlike users having this issues on a USB Wi-Fi dongle, resetting of the
      chip by replugging is not an option on this gateway due to the lack of
      any power cut functionality. Therefore, a (cold) reboot of the whole
      gateway is needed.
      
      Updating the firmware of the RTL8192CU WLAN controller from version
      v80.0 to v88.2 (as per output of rtl8xxxu) resolves this issue.
      The problem did no show up anymore for 1000 restarts.
      
      Please note:
       - Only rtl8192cufw_TMSC.bin tested (mainly on rtl8xxxu)
       - rtl8192cu seems to work as well as before, but I can not rule out
         that this new firmware version brings unwanted changes.
         The Realtek drivers containing v88.2 of the firmware
         (v4.0.1_6911.20130308 to v4.0.9_25039.20171107) have some changes
         compared to the version v3.4.2_3727.20120404, for which I do not know
         if those should be reflected in rtl8192cu.
      
      Unrelated of the initially described USB problem, another issue still
      remains after updating the firmware: Using the rtl8192cu driver,
      scanning for available SSIDs yields no more results after a few hundred
      scans (iw wlan0 scan). rtl8xxxu does not suffer from this problem.
      Signed-off-by: default avatarReto Schneider <code@reto-schneider.ch>
      Acked-by: default avatarLarry Finger <Larry.Finger@lwfinger.net>
      Tested-by: default avatarChris Chiu <chiu@endlessos.org>
      Signed-off-by: default avatarJosh Boyer <jwboyer@kernel.org>
      2ea86675
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    • Larry Finger's avatar
      rtlwifi/rtl8712u Revert firmware · d92576c7
      Larry Finger authored
      
      
      Although the newest firmware for the RTL8192SU, which is found in vendor
      driver rtl8188C_8192C_8192D_usb_linux_v3.4.2_3727.20120404, works with most
      devices, it causes drops of the wireless connection for the ASUS WL-167G V3
      (USB ID 0b05:1791), the D-Link DWA131 (07d1:3303), and probably others.
      Tests show that the firmware from vendor driver
      rtl8712_8188_8191_8192SU_usb_linux_v7_0.20100831 works better.
      
      This commerts reverts to that older firmware.
      Signed-off-by: default avatarLarry Finger <Larry.Finger@lwfinger.net>
      Signed-off-by: default avatarBen Hutchings <ben@decadent.org.uk>
      d92576c7
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