From: Peter Chen <peter.chen@nxp.com>
To: balbi@kernel.org
Cc: linux-usb@vger.kernel.org, linux-imx@nxp.com, pawell@cadence.com,
rogerq@ti.com, gregkh@linuxfoundation.org, jun.li@nxp.com,
Peter Chen <peter.chen@nxp.com>
Subject: [PATCH v2 4/8] usb: cdns3: gadget: add CHAIN and ISP bit for sg list use case
Date: Thu, 10 Sep 2020 17:11:26 +0800 [thread overview]
Message-ID: <20200910091130.20937-5-peter.chen@nxp.com> (raw)
In-Reply-To: <20200910091130.20937-1-peter.chen@nxp.com>
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>
---
drivers/usb/cdns3/gadget.c | 8 +++++++-
1 file changed, 7 insertions(+), 1 deletion(-)
diff --git a/drivers/usb/cdns3/gadget.c b/drivers/usb/cdns3/gadget.c
index f1626df65255..1df4ee2857e9 100644
--- a/drivers/usb/cdns3/gadget.c
+++ b/drivers/usb/cdns3/gadget.c
@@ -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;
--
2.17.1
next prev parent reply other threads:[~2020-09-10 9:14 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-09-10 9:11 [PATCH v2 0/8] usb: cdns3: improve the sg use case Peter Chen
2020-09-10 9:11 ` [PATCH v2 1/8] usb: cdns3: gadget: using correct sg operations Peter Chen
2020-09-24 7:27 ` Felipe Balbi
2020-09-24 9:33 ` Peter Chen
2020-09-29 3:40 ` Peter Chen
2020-09-29 6:29 ` Felipe Balbi
2020-09-10 9:11 ` [PATCH v2 2/8] usb: cdns3: gadget: improve the dump TRB operation at cdns3_ep_run_transfer Peter Chen
2020-09-10 9:11 ` [PATCH v2 3/8] usb: cdns3: gadget: calculate TDL correctly Peter Chen
2020-09-10 9:11 ` Peter Chen [this message]
2020-09-10 9:11 ` [PATCH v2 5/8] usb: cdns3: gadget: handle sg list use case at completion correctly Peter Chen
2020-09-10 9:11 ` [PATCH v2 6/8] usb: cdns3: gadget: need to handle sg case for workaround 2 case Peter Chen
2020-09-10 9:11 ` [PATCH v2 7/8] usb: cdns3: gadget: sg_support is only for DEV_VER_V2 or above Peter Chen
2020-09-10 9:11 ` [PATCH v2 8/8] usb: cdns3: gadget: enlarge the TRB ring length Peter Chen
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