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en:users:drivers:brcm80211

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en:users:drivers:brcm80211 [2017/06/07 09:28]
Arend van Spriel [Contact Info]
en:users:drivers:brcm80211 [2020/06/10 15:38]
Matteo Scordino
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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: 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://​www.linkedin.com/​feed/​update/​urn:​li:​activity:​6675830103454339072/​|this article]]
  
 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.txt · Last modified: 2024/03/20 10:46 by Peter Robinson