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usb: cdns3: gadget: add CHAIN and ISP bit for sg list use case

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For sg buffer list use case, we need to add ISP for each TRB, and
add CHAIN bit for each TRB except for the last TRB.

Signed-off-by: Peter Chen <peter.chen@nxp.com>
Signed-off-by: Felipe Balbi <balbi@kernel.org>
This commit is contained in:
Peter Chen 2020-09-10 17:11:26 +08:00 committed by Felipe Balbi
parent 4e218882eb
commit 87e1dcd489
1 changed files with 7 additions and 1 deletions
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8
drivers/usb/cdns3/gadget.c
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@ -1220,8 +1220,14 @@ static int cdns3_ep_run_transfer(struct cdns3_endpoint *priv_ep,
else
priv_req->trb->control = cpu_to_le32(control);
if (sg_supported)
if (sg_supported) {
trb->control |= TRB_ISP;
/* Don't set chain bit for last TRB */
if (sg_iter < num_trb - 1)
trb->control |= TRB_CHAIN;
s = sg_next(s);
}
control = 0;
++sg_iter;