kernel.git/drivers/usb/dwc3/core.h, branch linux-3.3.y

usb: dwc3: gadget: fix stream enable bit

2011-12-12T09:48:47Z

ep->max_streams is a mere hint to the gadget driver that 'ep' supports stream handling. Using that as a decision variable for enabling streams was my worst brain-fart to date. Instead, we should check from the Superspeed Endpoint Companion Descriptor if the endpoint has requested streams. For that we need a little re-factoring but it is now correct. Debugged-by: Sebastian Andrzej Siewior Signed-off-by: Felipe Balbi

usb: dwc3: ep0: use dwc3_request for ep0 requsts instead of usb_request

2011-12-12T09:48:45Z

Instead of special functions and shortcuts for sending our internal answers to the host we started doing what the gadget does and used the public API for this. Since we only were using a few fields the usb_request was enough. Later added the list handling in order to synchronize the host / gadget events and now we require to have the dwc3_request struct around our usb_request or else we touch memory that does not belong to us. So this patch does this. Reported-by: Partha Basak Signed-off-by: Sebastian Andrzej Siewior Signed-off-by: Felipe Balbi

usb: dwc3: workaround: missing disconnect event

2011-12-12T09:48:42Z

DWC3 revisions <1.88a have an issue which would case a missing Disconnect event if cable is disconnected while there's a Setup packet pending the FIFO. Signed-off-by: Felipe Balbi

usb: dwc3: workaround: U1/U2 -> U0 transiton

2011-12-12T09:48:34Z

RTL revisions <1.83a have an issue where, depending on the link partner, the USB link might do multiple entry/exit of low power states before a transfer takes place causing degraded throughput. The suggested workaround is to clear bits 12:9 of DCTL register if we see a transition from U1|U2 to U0 and only re-enable that on a transfer complete IRQ and we have no pending transfers on any of the enabled endpoints. Signed-off-by: Felipe Balbi

usb: dwc3: ep0: handle delayed_status again

2011-12-12T09:48:31Z

Since the re-worked ep0 handling (which uses HW's hints to recognize the ep0 status) we lost the delayed status handling. This is used by the file and mass storage gadget to gain some extra time so setup its internal status before it can proceed further requests. In particular the storage gadget does nothing on USB_REQ_SET_CONFIGURATION but wakes up a thread which handles the request. If the udc driver continues ep0 handling before the thread did its work then then endpoint is not yet configured and further requests will fail. Once the gadget is ready, it will enqueue an empty packet which is used for synchronization. In order to fix this issue, the patch does the following: Set ->delayed_status once the delayed_status has been notices and do not continue on the next XferNotReady event. We will continues ep0 processing once the gadget enqueued the zero packet for synchronization. A cleaner approach would be to enforce the gadget to enqueue an empty (zero) request even for the status phase but this would do for now. Signed-off-by: Sebastian Andrzej Siewior Signed-off-by: Felipe Balbi

usb: dwc3: use a helper function for operation mode setting

2011-12-12T09:48:26Z

There are two where need to set operational mode: - during initialization while we decide to run in host,device or DRD mode - at runtime via the debugfs interface. This patch provides a new function which sets the operational mode and moves its initialiation to the mode switch instead in the gadget code itself. Signed-off-by: Sebastian Andrzej Siewior Signed-off-by: Felipe Balbi

usb: dwc3: core: drop DWC3_EVENT_BUFFERS_MAX

2011-12-12T09:48:24Z

hardware will tell us how many event buffers we need to support, so let's allocate the array dynamically too. Signed-off-by: Felipe Balbi

usb: dwc3: move dwc3 device ID bitmap to core.c

2011-12-12T09:48:21Z

if we want to support situations where we have both SoC and PCIe versions of the IP on the same platform, we need to have sequential numbers between them, otherwise we will still have name collisions. Because of that, we need to move dwc3_get/put_device_id() to core.c and export that symbol to be used by glue layers. Signed-off-by: Felipe Balbi

usb: dwc3: remove special status request handling in ep0

2011-12-12T09:48:21Z

The GetStatus (STD)-request is handled the driver and uses a tiny hack to send the two bytes long answer. This patch removes the custom hack uses the normal usb_ep_queue() for that. Signed-off-by: Sebastian Andrzej Siewior Signed-off-by: Felipe Balbi

usb: dwc3: debugfs: add support for changing port mode

2011-12-12T09:48:15Z

This makes testing a lot easier when trying to switch between host and device modes. Signed-off-by: Felipe Balbi