u-boot.git/include/usb.h, branch v2017.09

dm: usb: Add a new USB controller operation 'update_hub_device'

2017-07-28T21:34:35+00:00

For USB host controllers like xHC, its internal representation of
hub needs to be updated after the hub descriptor is fetched. This
adds a new op that does this.

Signed-off-by: Bin Meng 
Reviewed-by: Simon Glass

usb: hub: Parse and save TT details from device descriptor

2017-07-28T21:34:34+00:00

A high speed hub has a special responsibility to handle full speed/
low speed devices connected on downstream ports. In this case, the
hub must isolate the high speed signaling environment from the full
speed/low speed signaling environment with the help of Transaction
Translator (TT). TT details are provided by hub descriptors and we
parse and save it to hub uclass_priv for later use.

Signed-off-by: Bin Meng 
Reviewed-by: Simon Glass

usb: hub: Support 'set hub depth' request for USB 3.0 hubs

2017-07-28T21:34:32+00:00

USB 3.0 hub uses a hub depth value multiplied by four as an offset
into the 'route string' to locate the bits it uses to determine the
downstream port number. We shall set the hub depth value of a USB
3.0 hub after it is configured.

Signed-off-by: Bin Meng 
Reviewed-by: Simon Glass

usb: hub: Add a new API to test if a hub device is root hub

2017-07-28T21:34:30+00:00

Sometimes we need know if a given hub device is root hub or not.
Add a new API to test this. This removes the xHCI driver's own
version is_root_hub() and change to use the new API.

While we are here, remove the unused/commented out get_usb_device()
in the xHCI driver too.

Signed-off-by: Bin Meng

usb: hub: Remove hub_port_reset()

2017-07-28T21:34:30+00:00

At present hub_port_reset() is defined in DM USB, but it is never
called hence remove it (removing another ifdefs).

While we are here, change legacy_hub_port_reset() name to
usb_hub_port_reset() to better match other function names in the
same hub module.

Signed-off-by: Bin Meng 
Reviewed-by: Simon Glass

usb: hub: Change USB hub descriptor to match USB 3.0 hubs

2017-07-28T21:34:20+00:00

USB 3.0 hubs have a slightly different hub descriptor than USB 2.0
hubs, with a fixed (rather than variable length) size. Change the
host controller drivers that access those last two fields
(DeviceRemovable and PortPowerCtrlMask) to use the union.

Signed-off-by: Bin Meng 
Reviewed-by: Simon Glass 
Reviewed-by: Stefan Roese 
Tested-by: Stefan Roese

Kconfig: USB: Migrate CONFIG_USB_EHCI to CONFIG_USB_EHCI_HCD

2017-05-15T14:40:05+00:00

In order to be able to migrate the various SoC EHCI CONFIG options we
first need to finish the switch from CONFIG_USB_EHCI to
CONFIG_USB_EHCI_HCD.

Cc: Marek Vasut 
Signed-off-by: Tom Rini 
Reviewed-by: Marek Vasut

dm: usb: Drop the get_dev() function

2016-05-17T15:54:43+00:00

This function is implemented by the legacy block functions now. Drop it.

Signed-off-by: Simon Glass

Fix spelling of "transferred".

2016-03-22T16:16:16+00:00

Signed-off-by: Vagrant Cascadian 
Acked-by: Marek Vasut 
Reviewed-by: Simon Glass 
Reviewed-by: Tom Rini

usb: Change power-on / scanning timeout handling

2016-03-20T17:00:45+00:00

This patch changes the USB port scanning procedure and timeout
handling in the following ways:

a)
The power-on delay in usb_hub_power_on() is now reduced to a value of
max(100ms, "hub->desc.bPwrOn2PwrGood * 2"). The code does not wait
using mdelay, instead usb_hub_power_on() will wait before querying
the device in the scanning loop later. The total timeout for this
hub, which is 1 second + "hub->desc.bPwrOn2PwrGood * 2" is calculated
and will be used in the following per-port scanning loop as the timeout
to detect active USB devices on this hub.

b)
Don't delay the minimum delay (for power to stabilize) in
usb_hub_power_on(). Instead skip querying these devices in the scannig
loop until the delay time is reached.

c)
The ports are now scanned in a quasi parallel way. The current code did
wait for each (unconnected) port to reach its timeout and only then
continue with the next port. This patch now changes this to scan all
ports of all USB hubs quasi simultaneously. For this, all ports are added
to a scanning list. This list is scanned until all ports are ready
by either a) reaching the connection timeout (calculated earlier), or
by b) detecting a USB device. This results in a faster USB scan time as
the recursive scanning of USB hubs connected to the hub that's currently
being scanned will start earlier.

One small functional change to the original code is, that ports with
overcurrent detection will now get rescanned multiple times
(PORT_OVERCURRENT_MAX_SCAN_COUNT).

Without this patch:
starting USB...
USB0:   USB EHCI 1.00
scanning bus 0 for devices... 9 USB Device(s) found

time: 20.163 seconds

With this patch:
starting USB...
USB0:   USB EHCI 1.00
scanning bus 0 for devices... 9 USB Device(s) found

time: 1.822 seconds

So ~18.3 seconds of USB scanning time reduction.

Signed-off-by: Stefan Roese 
Acked-by: Hans de Goede 
Tested-by: Stephen Warren