Hi, On 11 February 2014 21:00, Kumar Gala <galak@xxxxxxxxxxxxxx> wrote: > > On Feb 11, 2014, at 10:23 AM, Lukasz Rymanowski <lukasz.rymanowski@xxxxxxxxx> wrote: > >> Hi >> >> On 7 February 2014 12:35, Lukasz Rymanowski <lukasz.rymanowski@xxxxxxxxx> wrote: >>> Hello, >>> >>> This is a try (long shoot) to upstream hci shared memory driver (hci_smd) >>> which is used on Qualcomm platforms and BT chips. >>> >>> To make it build with upstream tree I had to introduce some simple SMD API. >>> The idea here is that since SMD channel is represented by platform device >>> (as it is done in mach-msm), >>> then platfrom_data contains smd_data which contains API for that channel. >>> >>> Writing this SMD API I was inspired with MSM-SMD and since I'm not an expert >>> in this area I'm asking for comments here. >>> >>> Maybe instead of SMD API I made, I should expose functions like smd_open(), smd_write() >>> etc. something similar how sdio does, and just deliver to upstream dummy device >>> implementing this SMD API? >>> >>> Other options I was considering is to implement module inside mach-msm which >>> would handle registering SMD BT Channels and when it is done, it would register >>> new platform device like "smd-bt". Then I could move smd.h to some bluetooth includes >>> (althought don't now where at the moment) and hci_smd would register driver for "smd-bt" >>> In this case I would also could rid of one static variable I have now in hci_smd >>> >>> Comments on those options are welcome. >>> >>> Anyway, Hci_smd is based on one of the older version of this driver found in msm kernel >>> branch, so there are no wakelocks as in new version and also workqueues are used >>> instead of takslet. >>> >>> Since SMD expose two channels, one for CMD/EVENT and one for ACL Data I decide to >>> do separate worqueues for this. This is to make sure that ACL data never blocks EVENT >>> packages >>> >> >> Adding linux-arm-msm group for comments on SMD API. >> >> BR >> Lukasz > > What chip/SoC/board are you trying to get bluetooth support on? > I'm already running it on Nexus 4 and 7, but for this I have also more changes in mach-msm (smd_tty.c, smd.c) on top of msm kernel branch for android. \Lukasz > - k > > -- > Employee of Qualcomm Innovation Center, Inc. > Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum, hosted by The Linux Foundation > -- To unsubscribe from this list: send the line "unsubscribe linux-arm-msm" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
