diff options
| author | Peter Chen <peter.chen@nxp.com> | 2020-03-16 17:27:24 +0800 |
|---|---|---|
| committer | Peter Chen <peter.chen@nxp.com> | 2020-03-19 15:06:44 +0800 |
| commit | 3490e68497e4d9d2093e866c686bf7c69db7f572 (patch) | |
| tree | 9d4064e7f46ac3ffaf6376a11f269f27e502b0c8 /drivers/usb/cdns3 | |
| parent | d2e892c29de0aec78452cf512853b953fdf7db23 (diff) | |
MLK-23595-2 usb: cdns3: gadget: add CHAIN and ISP bit for sg list
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.
Reviewed-by: Jun Li <jun.li@nxp.com>
Signed-off-by: Peter Chen <peter.chen@nxp.com>
Diffstat (limited to 'drivers/usb/cdns3')
| -rw-r--r-- | drivers/usb/cdns3/gadget.c | 12 |
1 files changed, 9 insertions, 3 deletions
diff --git a/drivers/usb/cdns3/gadget.c b/drivers/usb/cdns3/gadget.c index 2b231f5f8bd1..720c90db751b 100644 --- a/drivers/usb/cdns3/gadget.c +++ b/drivers/usb/cdns3/gadget.c @@ -715,14 +715,20 @@ int cdns3_ep_run_transfer(struct cdns3_endpoint *priv_ep, trb->control = control; control = 0; - ++sg_iter; - if (request->num_mapped_sgs) + if (request->num_mapped_sgs) { + 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); + } + priv_req->end_trb = priv_ep->enqueue; cdns3_ep_inc_enq(priv_ep); trb = priv_ep->trb_pool + priv_ep->enqueue; trb->length = 0; - } while (sg_iter < num_trb); + } while (++sg_iter < num_trb); trb = priv_req->trb; |