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DM USB: introduce data structure and APIs for USB port mapper

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Introduce the struct usb_dev which is used to abstract the physical USB
devices. And APIs for external call are also provided.

Change-Id: Ia25d52a6c670040da787f82b3bea34eee9f3d04d
Signed-off-by: Wu, Xiaoguang <xiaoguang.wu@intel.com>
Reviewed-by: Shuo Liu <shuo.a.liu@intel.com>
Reviewed-by: Yu Wang <yu1.wang@intel.com>
Reviewed-by: Zhao Yakui <yakui.zhao@intel.com>
Acked-by: Eddie Dong <eddie.dong@intel.com>
This commit is contained in:
Wu, Xiaoguang
2018-04-15 17:59:21 +08:00
committed by lijinxia
parent 51f7633f82
commit 1816d3e608
6 changed files with 338 additions and 1 deletions
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51
devicemodel/hw/usb_core.c
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@@ -24,6 +24,57 @@
* SUCH DAMAGE.
*/
/*
* USB emulation designed as following diagram. It devided into three layers:
* HCD: USB host controller device layer, like xHCI, eHCI...
* USB core: middle abstraction layer for USB statck.
* USB Port Mapper: This layer supports to share physical USB
* devices(physical ports) to spcified virtual USB port of
* HCD DM. All the commands and data transfers are through
* Libusb to access native USB stack.
*
* +---------------+
* | |
* +----------+----------+ |
* | ACRN DM | |
* | +-----------------+ | |
* | | HCD (xHCI) | | |
* | +-----------------+ | |
* | | | |
* | +-----------------+ | |
* | | USB Core | | |
* | +-----------------+ | |
* | | | |
* | +-----------------+ | |
* | | USB Port Mapper | | |
* | +-----------------+ | |
* | | | |
* | +-----------------+ | |
* | | Libusb | | |
* | +-----------------+ | |
* +---------------------+ |
* Service OS User Space | User OS User Space
* |
* -------------------------- | ---------------------------
* |
* Service OS Kernel Space | User OS Kernel Space
* |
* | +-----------------+
* | | USB Core |
* | +-----------------+
* | |
* | +-----------------+
* | | HCD |
* | | (xHCI/uHCI/...) |
* | +--------+--------+
* | |
* +-------------+
* Current distribution:
* HCD: xhci.{h,c}
* USB core: usb_core.{h,c}
* USB device: usb_mouse.c usb_pmapper.{h,c}
*/
#include <sys/cdefs.h>
#include <sys/types.h>
#include <sys/queue.h>