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49b5c0d29f
Some SoCs have different number of endpoints between the EP-IN
and EP-OUT (e.g. RK3399/RV1126 have 7 in endpoints and 6 out
endpoints), it will fail to init all of the endpoints.
In my test case, I use RV1126 dwc3 to support 3 UVC functions
at the same time, and each UVC function need one in endpoint
for control interface and one in endpoint for streaming interface,
so it needs to init 7 in endpoints (include ep0-in) in this case.
Without this patch, it will fail to init the ep7-in because
it set the wrong DWC3_DEP_BASE for ep7-in.
According to dwc3 databook, the register DALEPENA and the "USB
Endpoint Number" field of Parameter1 are doing 1:1 mapping for
endpoints, meaning physical endpoints 2 maps to logical endpoint
2:
Bit[0]: USB EP0-OUT
Bit[1]: USB EP0-IN
Bit[2]: USB EP1-OUT
Bit[3]: USB EP1-IN
...
Bit[13]: USB EP7-IN
The dwc3 driver use dep->number to index endpoint number and init
the DALEPENA and the "USB Endpoint Number" field of Parameter1.
For RV1126, it should set dep->number to 13 for EP7-IN.
But the registers DEPCMDPAR2(#n),DEPCMDPAR1(#n), DEPCMDPAR0(#n),
and DEPCMD(#n) don't 1:1 mapping for endpoints. For RV1126, it
should set #n to 12 for EP7-IN. And the event->endpoint_number
in the dwc3_endpoint_interrupt() is equal to 12 for EP7-IN.
Fixes: c2185009e2 ("usb: dwc3: gadget: fix init endpoints and resize tx fifos")
Change-Id: I0898306196f4dacf09b0de3cf4d76d9026b6315c
Signed-off-by: William Wu <william.wu@rock-chips.com>
Linux kernel
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