Cannot patch firmware of broadcom based bluetooth adapter

[eugnikolaev]

Hello!

I bought:
- ASUS USB Adapter with Bluetooth (USB-BT400
- headset InterStep SBH-100

This hardware (both devices) works perfectly on Win7. HeadSet works like a charm with MacOS and iOS (sure with their own BT adapters).

My Linux Mint desktop:
Kernel:
3.16.0-38 (Then I updated it to 3.19, will write below)

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# some info skipped as not important
$ cat /etc/linuxmint/info
RELEASE=17.2
CODENAME=rafaela
EDITION="Cinnamon 64-bit"
DESCRIPTION="Linux Mint 17.2 Rafaela"
DESKTOP=Gnome
TOOLKIT=GTK
GRUB_TITLE=Linux Mint 17.2 Cinnamon 64-bit

I was only able link the headset by A2DP. I was able listen to music this way. But sure I have no mic.
I generally want to use the headset for skype voice chat. So I switched it to HFP/HSP mode.
It made qmmp hang (but it worked again when I switched to A2DP).
No test sound appeared when I used Preferences - Sound.

I started googling and I found that my ASUS BT400 adapter based on Broadcom chip which needs some additional firmware to be uploaded.
For example, I used this article (and many similar articles and posts):
http://plugable.com/2014/06/23/plugable ... s-on-linux

I used their firmwares, built my own hcd from a hex which I took from my Win7, but with no success.
There were no any lines at the logs (dmesg, syslog) as people who succeeded had.

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$ dmesg | grep -i blue
[    3.853033] Bluetooth: Core ver 2.20
[    3.853129] Bluetooth: HCI device and connection manager initialized
[    3.853132] Bluetooth: HCI socket layer initialized
[    3.853134] Bluetooth: L2CAP socket layer initialized
[    3.853138] Bluetooth: SCO socket layer initialized
[    5.656014] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[    5.656017] Bluetooth: BNEP filters: protocol multicast
[    5.656020] Bluetooth: BNEP socket layer initialized
[    5.665394] Bluetooth: RFCOMM TTY layer initialized
[    5.665399] Bluetooth: RFCOMM socket layer initialized
[    5.665402] Bluetooth: RFCOMM ver 1.11

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$ dmesg | grep -i firmware
[    0.116475] [Firmware Bug]: ACPI: BIOS _OSI(Linux) query ignored
[    4.333620] usb 1-10: r8712u: Loading firmware from "rtlwifi/rtl8712u.bin"

As you see - nothing, but there should be something like:

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[513973.825046] Bluetooth: hci0: BCM: patching hci_ver=06 hci_rev=153a lmp_ver=06 lmp_subver=220e
[513974.598398] Bluetooth: hci0: BCM: firmware hci_ver=06 hci_rev=153a lmp_ver=06 lmp_subver=220e

And there is no even any error message...

Here you are my usb-devices:

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T:  Bus=01 Lev=01 Prnt=01 Port=03 Cnt=02 Dev#=  2 Spd=12  MxCh= 0
D:  Ver= 2.00 Cls=ff(vend.) Sub=01 Prot=01 MxPS=64 #Cfgs=  1
P:  Vendor=0b05 ProdID=17cb Rev=01.12
S:  Manufacturer=Broadcom Corp
S:  Product=BCM20702A0
S:  SerialNumber=5CF370687D71
C:  #Ifs= 4 Cfg#= 1 Atr=a0 MxPwr=100mA
I:  If#= 0 Alt= 0 #EPs= 3 Cls=ff(vend.) Sub=01 Prot=01 Driver=btusb
I:  If#= 1 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=01 Prot=01 Driver=btusb
I:  If#= 2 Alt= 0 #EPs= 2 Cls=ff(vend.) Sub=ff Prot=ff Driver=(none)
I:  If#= 3 Alt= 0 #EPs= 0 Cls=fe(app. ) Sub=01 Prot=01 Driver=(none)

This way I placed my .hcd file:

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$ ls -la /lib/firmware/brcm/
total 7744
drwxr-xr-x  2 root root   4096 Jul 22 09:41 .
drwxr-xr-x 62 root root  20480 Jul 22 09:34 ..
-rw-r--r--  1 root root  28690 Jul 21 23:27 BCM20702A0-0b05-17cb.hcd
-rw-r--r--  1 root root 269595 Nov 24  2014 bcm4329-fullmac-4.bin
-rw-r--r--  1 root root  96224 Dec  1  2014 bcm43xx-0.fw
-rw-r--r--  1 root root    180 Dec  1  2014 bcm43xx_hdr-0.fw
-rw-r--r--  1 root root 397312 Dec  1  2014 brcmfmac43143.bin
-rwxr-xr-x  1 root root 385067 Jul  2 22:44 brcmfmac43143-sdio.bin
-rw-r--r--  1 root root 348160 Nov 24  2014 brcmfmac43236b.bin
-rw-r--r--  1 root root 455745 Dec  1  2014 brcmfmac43241b0-sdio.bin
-rw-r--r--  1 root root 403855 Dec  1  2014 brcmfmac43241b4-sdio.bin
-rw-r--r--  1 root root 479232 Jun  2 15:18 brcmfmac43242a.bin
-rw-r--r--  1 root root 253748 Dec  1  2014 brcmfmac4329-sdio.bin
-rw-r--r--  1 root root 222126 Dec  1  2014 brcmfmac4330-sdio.bin
-rw-r--r--  1 root root 451566 Dec  1  2014 brcmfmac4334-sdio.bin
-rw-r--r--  1 root root 569291 Dec  1  2014 brcmfmac4335-sdio.bin
-rw-r--r--  1 root root 219557 Dec  1  2014 brcmfmac43362-sdio.bin
-rw-r--r--  1 root root 493599 Jun  2 15:18 brcmfmac4339-sdio.bin
-rw-r--r--  1 root root 507752 Jul  2 22:44 brcmfmac4354-sdio.bin
-rw-r--r--  1 root root 557056 Jun  2 15:18 brcmfmac43569.bin
-rw-r--r--  1 root root 550333 Jun  2 15:18 brcmfmac43570-pcie.bin
-rw-r--r--  1 root root 588940 Jun  2 15:18 brcmfmac43602-pcie.ap.bin
-rw-r--r--  1 root root 590544 Jun  2 15:18 brcmfmac43602-pcie.bin

Then I tried a python uploader script:
http://ubuntuforums.org/showthread.php?t=2231813

It worked with no error messages and disconnected the BT adapter. When I connected it again - result was the same.

Then I updated the kernel:

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Linux lin-pc 3.19.8-031908-generic #201505110938 SMP Mon May 11 13:39:59 UTC 2015 x86_64 x86_64 x86_64 GNU/Linux

But the result is the same.

What I am doing wrong? Why it does not even try to upload the firmware?

[eugnikolaev]

I think of another BT adapter as a last resort. Could you please recommend me one which works with HFP/HSP out-of-box?

[JeremyB]

Delete the hcd file and reboot, then look for a firmware loading error in dmesg

[eugnikolaev]

Thank you for attention.

Unfortunately, nothing has changed:

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$ dmesg | grep -i firm
[    0.115890] [Firmware Bug]: ACPI: BIOS _OSI(Linux) query ignored
[    4.210191] usb 1-10: r8712u: Loading firmware from "rtlwifi/rtl8712u.bin"
$ dmesg | grep -i blue
[    4.021372] Bluetooth: Core ver 2.20
[    4.021414] Bluetooth: HCI device and connection manager initialized
[    4.021659] Bluetooth: HCI socket layer initialized
[    4.021662] Bluetooth: L2CAP socket layer initialized
[    4.021667] Bluetooth: SCO socket layer initialized
[    4.037029] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[    4.037032] Bluetooth: BNEP filters: protocol multicast
[    4.037035] Bluetooth: BNEP socket layer initialized
[    4.043089] Bluetooth: RFCOMM TTY layer initialized
[    4.043095] Bluetooth: RFCOMM socket layer initialized
[    4.043098] Bluetooth: RFCOMM ver 1.11

[JeremyB]

This will only work for the 3.19 kernel you have

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wget https://www.dropbox.com/s/xu80svavlazttaf/bluetooth-3.19.tar.gz

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tar -zxvf bluetooth-3.19.tar.gz

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sudo apt-get install build-essential linux-headers-$(uname -r)

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cd bluetooth

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make -C /lib/modules/$(uname -r)/build M=$PWD modules

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sudo modprobe -r btusb

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sudo cp btusb.ko /lib/modules/$(uname -r)/kernel/drivers/bluetooth/btusb.ko

Then copy your hcd firmware file back into /lib/firmware/brcm

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sudo modprobe btusb

And see if HFP/HSP works

[eugnikolaev]

Got the following lines!

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$ dmesg | grep -i blue
[    4.021372] Bluetooth: Core ver 2.20
[    4.021414] Bluetooth: HCI device and connection manager initialized
[    4.021659] Bluetooth: HCI socket layer initialized
[    4.021662] Bluetooth: L2CAP socket layer initialized
[    4.021667] Bluetooth: SCO socket layer initialized
[    4.037029] Bluetooth: BNEP (Ethernet Emulation) ver 1.3
[    4.037032] Bluetooth: BNEP filters: protocol multicast
[    4.037035] Bluetooth: BNEP socket layer initialized
[    4.043089] Bluetooth: RFCOMM TTY layer initialized
[    4.043095] Bluetooth: RFCOMM socket layer initialized
[    4.043098] Bluetooth: RFCOMM ver 1.11
[ 5747.586036] Bluetooth: hci0 urb ffff8800d1fb1600 failed to resubmit (2)
[ 5945.172578] Bluetooth: hci0: BCM: patching hci_ver=06 hci_rev=1000 lmp_ver=06 lmp_subver=220e
[ 5945.727065] Bluetooth: hci0: BCM: firmware hci_ver=06 hci_rev=13a0 lmp_ver=06 lmp_subver=220e

And I was able to call to my colleague!
It works! Thank you very much!!!