This patchset is for USB offload feature, which makes Co-processor to use some memories of xhci. Especially it's useful for USB Audio scenario. Audio stream would get shortcut because Co-processor directly write/read data in xhci memories. It could get speed-up using faster memory like SRAM. That's why this gives vendors flexibilty of memory management. Several pathches have been merged in AOSP kernel(android12-5.10) and I put together and split into 3 patches. Plus let me add user(xhci-exynos) module to see how user could use it. To sum up, it's for providing xhci memories to Co-Processor. It would cover DCBAA, Device Context, Transfer Ring, Event Ring, ERST. It needs xhci hooks and to export some xhci symbols. Changes in v2 : - Fix commit message by adding Signed-off-by in each patch. - Fix conflict on latest. Changes in v3 : - Remove export symbols and xhci hooks which xhci-exynos don't need. - Modify commit message to clarify why it needs to export symbols. - Check compiling of xhci-exynos. Daehwan Jung (4): usb: host: export symbols for xhci hooks usage usb: host: add xhci hooks for USB offload usb: host: add some to xhci overrides for USB offload usb: host: add xhci-exynos driver drivers/usb/host/Kconfig | 9 + drivers/usb/host/Makefile | 1 + drivers/usb/host/xhci-exynos.c | 982 +++++++++++++++++++++++++++++++++ drivers/usb/host/xhci-exynos.h | 63 +++ drivers/usb/host/xhci-hub.c | 7 + drivers/usb/host/xhci-mem.c | 150 ++++- drivers/usb/host/xhci-plat.c | 43 +- drivers/usb/host/xhci-plat.h | 7 + drivers/usb/host/xhci-ring.c | 1 + drivers/usb/host/xhci.c | 90 ++- drivers/usb/host/xhci.h | 50 ++ 11 files changed, 1379 insertions(+), 24 deletions(-) create mode 100644 drivers/usb/host/xhci-exynos.c create mode 100644 drivers/usb/host/xhci-exynos.h -- 2.31.1
