e961c47e66
In R-Car Gen3 USB 3.0 Function, if host is detached an interrupt will be generated and Suspended state bit is set in interrupt status register. Interrupt handler will call driver->suspend(composite_suspend) if suspended state bit is set. composite_suspend will call ffs_func_suspend which will post FUNCTIONFS_SUSPEND and will be consumed by user space application via /dev/ep0. To be able to detect the host detach, USB_INT_1_B2_SPND to cover the Suspended bit of the B2_SPND_OUT[9] from the USB Status Register (USB_STA) register and perform appropriate action in the usb3_irq_epc_int_1 function. Without this commit, disconnection of the phone from R-Car H3 ES2.0 Salvator-X CN11 port is not recognized and reverse role switch does not happen. If phone is connected again it does not enumerate. With this commit, disconnection will be recognized and reverse role switch will happen by a user space application. If phone is connected again it will enumerate properly and will become visible in the output of 'lsusb'. Reviewed-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Tested-by: Yoshihiro Shimoda <yoshihiro.shimoda.uh@renesas.com> Signed-off-by: Veeraiyan Chidambaram <veeraiyan.chidambaram@in.bosch.com> Signed-off-by: Felipe Balbi <felipe.balbi@linux.intel.com>
Linux kernel
============
There are several guides for kernel developers and users. These guides can
be rendered in a number of formats, like HTML and PDF. Please read
Documentation/admin-guide/README.rst first.
In order to build the documentation, use ``make htmldocs`` or
``make pdfdocs``. The formatted documentation can also be read online at:
https://www.kernel.org/doc/html/latest/
There are various text files in the Documentation/ subdirectory,
several of them using the Restructured Text markup notation.
Please read the Documentation/process/changes.rst file, as it contains the
requirements for building and running the kernel, and information about
the problems which may result by upgrading your kernel.