btmrvl driver — The Linux Kernel 5.18.5-gnu-1 documentation

# btmrvl driver

All commands are used via debugfs interface.

## Set/get driver configurations

Path: /debug/btmrvl/config/

gpiogap=[n], hscfgcmd

  These commands are used to configure the host sleep parameters:: bit 8:0 – Gap bit 16:8 – GPIO

  where GPIO is the pin number of GPIO used to wake up the host. It could be any valid GPIO pin# (e.g. 0-7) or 0xff (SDIO interface wakeup will be used instead).

  where Gap is the gap in milli seconds between wakeup signal and wakeup event, or 0xff for special host sleep setting.

  Usage:

      # Use SDIO interface to wake up the host and set GAP to 0x80:
      echo 0xff80 > /debug/btmrvl/config/gpiogap
      echo 1 > /debug/btmrvl/config/hscfgcmd

      # Use GPIO pin #3 to wake up the host and set GAP to 0xff:
      echo 0x03ff >  /debug/btmrvl/config/gpiogap
      echo 1 > /debug/btmrvl/config/hscfgcmd

psmode=[n], pscmd

  These commands are used to enable/disable auto sleep mode

  where the option is:

      1       -- Enable auto sleep mode
      0       -- Disable auto sleep mode

  Usage:

      # Enable auto sleep mode
      echo 1 > /debug/btmrvl/config/psmode
      echo 1 > /debug/btmrvl/config/pscmd

      # Disable auto sleep mode
      echo 0 > /debug/btmrvl/config/psmode
      echo 1 > /debug/btmrvl/config/pscmd

hsmode=[n], hscmd

  These commands are used to enable host sleep or wake up firmware

  where the option is:

      1       -- Enable host sleep
      0       -- Wake up firmware

  Usage:

      # Enable host sleep
      echo 1 > /debug/btmrvl/config/hsmode
      echo 1 > /debug/btmrvl/config/hscmd

      # Wake up firmware
      echo 0 > /debug/btmrvl/config/hsmode
      echo 1 > /debug/btmrvl/config/hscmd

## Get driver status

Path: /debug/btmrvl/status/

Usage:

    cat /debug/btmrvl/status/<args>

where the args are:

curpsmode

  This command displays current auto sleep status.

psstate

  This command display the power save state.

hsstate

  This command display the host sleep state.

txdnldrdy

  This command displays the value of Tx download ready flag.

## Issuing a raw hci command

Use hcitool to issue raw hci command, refer to hcitool manual

Usage:

    Hcitool cmd <ogf> <ocf> [Parameters]

Interface Control Command:

    hcitool cmd 0x3f 0x5b 0xf5 0x01 0x00    --Enable All interface
    hcitool cmd 0x3f 0x5b 0xf5 0x01 0x01    --Enable Wlan interface
    hcitool cmd 0x3f 0x5b 0xf5 0x01 0x02    --Enable BT interface
    hcitool cmd 0x3f 0x5b 0xf5 0x00 0x00    --Disable All interface
    hcitool cmd 0x3f 0x5b 0xf5 0x00 0x01    --Disable Wlan interface
    hcitool cmd 0x3f 0x5b 0xf5 0x00 0x02    --Disable BT interface

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