I have a Dell/Broadcom 413c:8143 device and the patchram is apparently
still not being applied for me in Ubuntu 20.04, kernel
`5.4.0-70-generic`.
I see that the following struct was added in early 2017:
/* Dell Computer - Broadcom based */
{ USB_VENDOR_AND_INTERFACE_INFO(0x413c, 0xff, 0x01, 0x01),
.driver_info = BTUSB_BCM_PATCHRAM },
Commit diffs:
https://github.com/torvalds/linux/commit/fdfddc601713d4ed564b0bd25b29415bd622020a
https://kernel.ubuntu.com/git/ubuntu/ubuntu-
zesty.git/diff/drivers/bluetooth/btusb.c?h=Ubuntu-4.10.0-14.16&id=9f8d1a6f221b33b294032c15e4739a8a9076aaec
However, an earlier struct some ten items above appears to be blocking
the addition from taking effect:
{ USB_DEVICE(0x413c, 0x8197) },
With the stock Ubuntu module HSP/HFP does not work for me, but if I
remove the `USB_DEVICE` item, leaving the
`USB_VENDOR_AND_INTERFACE_INFO` item, and recompile, the patchram is
applied and HSP/HFP works.
Might it be necessary to remove the previous `USB_DEVICE` item from the
module source?
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https://bugs.launchpad.net/bugs/1065400
Title:
Support for loading Broadcom bluetooth firmware
Status in linux package in Ubuntu:
Fix Released
Status in linux source package in Precise:
Fix Released
Status in linux source package in Quantal:
Fix Released
Status in linux source package in Raring:
Fix Released
Status in linux source package in Saucy:
Fix Released
Status in linux source package in Trusty:
Confirmed
Bug description:
Broadcom bluetooth chips require a tool called patchram uploader [1]
to load firmware. This applies to at least BCM20702 and BCM43142.
Although some of the devices have an OTPROM that contains required
firmware, but it is found that these devices would not have HFP/HSP
support unless a upgraded firmware is loaded via patchram uploader.
This tool requires hci device to do the firmware loading, but this may
cause some race condition between patchram tool and bluetoothd or
something that also works on hci interface.
Also it needs some hooks to make firmware loads after bootup, s3, s4,
rfkill, and device hotplug events. Implement this loader in kernel
module would make things more easier.
[1] http://marc.info/?l=linux-bluetooth&m=132039175324993&w=2
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