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en:users:drivers:brcm80211 [2017/06/07 09:28]
Arend van Spriel [Contact Info]
en:users:drivers:brcm80211 [2020/06/11 01:02] (current)
Matteo Scordino [Firmware installation]
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 === Current === === Current ===
  
-For SDIO driver you need to copy the nvram for your system and place it in /​lib/​firmware/​brcm. The nvram file name depends on the chip you have. The kernel log will tell you the exact file name. For the USB driver no nvram file is needed. ​+For SDIO driver you need to copy the nvram for your system and place it in /​lib/​firmware/​brcm. The nvram file name depends on the chip you have. The kernel log will tell you the exact file name.  
 + 
 +For the USB driver no nvram file is //​strictly// ​needed: in fact, the driver only loads the firmware blob and does not look for an nvram text file. However, the nvram parameters are still required and they are already part of the firmware blob. This is a TRX file which contains the nvram parameters as a sequence of zero-terminated plain text strings, appended at the end of the last section. 
 +For an example of how to modify/add nvram parameters for USB devices, see [[https://​blog.elimo.io/​2020/​06/​05/​pta-coexistence.html|this post]]
  
 The firmware files are located in the linux-firmware repository and can be copied as is to /​lib/​firmware/​brcm. ​ The firmware files are located in the linux-firmware repository and can be copied as is to /​lib/​firmware/​brcm. ​
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 ==== Regulatory Implementation for brcmsmac ==== ==== Regulatory Implementation for brcmsmac ====
  
-This generation of chips contain additional ​ regulatory support independent of the driver. The devices use a single ​ worldwide regulatory domain, with channels ​12-14 (2.4 GHz band) and  channels 52-64 and 100-140 (5 GHz band) restricted to passive operation. ​ Transmission on those channels is suppressed until appropriate other  traffic is observed on those channels. Within the driver, we use the  ficticious country code "​X2"​ to represent this worldwide regulatory ​ domain. There is currently no interface to configure a different domain. ​ The driver reads the SROM country code from the chip and hands it up to  mac80211 as the regulatory hint, however this information is otherwise ​ unused with the driver. ​+This generation of chips contain additional ​ regulatory support independent of the driver. The devices use a single ​ worldwide regulatory domain, with channels ​1-11 (2.4 GHz band) and  channels 52-64 and 100-140 (5 GHz band) restricted to passive operation. ​ Transmission on those channels is suppressed until appropriate other  traffic is observed on those channels. Within the driver, we use the  ficticious country code "​X2"​ to represent this worldwide regulatory ​ domain. There is currently no interface to configure a different domain. ​ The driver reads the SROM country code from the chip and hands it up to  mac80211 as the regulatory hint, however this information is otherwise ​ unused with the driver. ​
  
en/users/drivers/brcm80211.1496827734.txt.gz · Last modified: 2017/06/07 09:28 by Arend van Spriel