--- zzzz-none-000/linux-3.10.107/Documentation/usb/WUSB-Design-overview.txt 2017-06-27 09:49:32.000000000 +0000 +++ scorpion-7490-727/linux-3.10.107/Documentation/usb/WUSB-Design-overview.txt 2021-02-04 17:41:59.000000000 +0000 @@ -25,7 +25,7 @@ * Design-overview.txt-1.8 This code implements a Ultra Wide Band stack for Linux, as well as -drivers for the the USB based UWB radio controllers defined in the +drivers for the USB based UWB radio controllers defined in the Wireless USB 1.0 specification (including Wireless USB host controller and an Intel WiNET controller). @@ -161,19 +161,10 @@ The main building block here is the UWB device (struct uwb_dev). For each device that pops up in radio presence (ie: the UWB host receives a beacon from it) you get a struct uwb_dev that will show up in -/sys/class/uwb and in /sys/bus/uwb/devices. +/sys/bus/uwb/devices. -For each RC that is detected, a new struct uwb_rc is created. In turn, a -RC is also a device, so they also show in /sys/class/uwb and -/sys/bus/uwb/devices, but at the same time, only radio controllers show -up in /sys/class/uwb_rc. - - * - - [*] The reason for RCs being also devices is that not only we can - see them while enumerating the system device tree, but also on the - radio (their beacons and stuff), so the handling has to be - likewise to that of a device. +For each RC that is detected, a new struct uwb_rc and struct uwb_dev are +created. An entry is also created in /sys/class/uwb_rc for each RC. Each RC driver is implemented by a separate driver that plugs into the interface that the UWB stack provides through a struct uwb_rc_ops. The @@ -246,7 +237,7 @@ Device lists -All UWB devices are kept in the list of the struct bus_type uwb_bus. +All UWB devices are kept in the list of the struct bus_type uwb_bus_type. Bandwidth allocation @@ -317,7 +308,7 @@ into /devconnect/). This process starts the authentication process for the device. First we allocate a /fake port/ and assign an unauthenticated address (128 to 255--what we really do is -0x80 | fake_port_idx). We fiddle with the fake port status and /khubd/ +0x80 | fake_port_idx). We fiddle with the fake port status and /hub_wq/ sees a new connection, so he moves on to enable the fake port with a reset. So now we are in the reset path -- we know we have a non-yet enumerated @@ -326,7 +317,7 @@ exchange (FIXME: not yet done) and issue a /set address 0/ to bring the device to the default state. Device is authenticated. -From here, the USB stack takes control through the usb_hcd ops. khubd +From here, the USB stack takes control through the usb_hcd ops. hub_wq has seen the port status changes, as we have been toggling them. It will start enumerating and doing transfers through usb_hcd->urb_enqueue() to read descriptors and move our data. @@ -340,7 +331,7 @@ arrives to us as a notification through devconnect.c:wusb_handle_dn_alive(). If a device times out, we disconnect it from the system (cleaning up internal information and -toggling the bits in the fake hub port, which kicks khubd into removing +toggling the bits in the fake hub port, which kicks hub_wq into removing the rest of the stuff). This is done through devconnect:__wusb_check_devs(), which will scan the