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
SD8688 firmware¶
Images:
- /lib/firmware/sd8688_helper.bin 
- /lib/firmware/sd8688.bin 
The images can be downloaded from:
git.infradead.org/users/dwmw2/linux-firmware.git/libertas/