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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 3/8] usb: cdns3: gadget: calculate TDL correctly
Date: Thu, 10 Sep 2020 17:11:25 +0800	[thread overview]
Message-ID: <20200910091130.20937-4-peter.chen@nxp.com> (raw)
In-Reply-To: <20200910091130.20937-1-peter.chen@nxp.com>

TDL is for TD length, so we need to calculate this value for
TD (request), but not for TRB, the TDL value is only needed
to stored at the first TRB in TD.

Signed-off-by: Peter Chen <peter.chen@nxp.com>
---
 drivers/usb/cdns3/gadget.c | 23 ++++++++++++-----------
 1 file changed, 12 insertions(+), 11 deletions(-)

diff --git a/drivers/usb/cdns3/gadget.c b/drivers/usb/cdns3/gadget.c
index d8eb5b1717f8..f1626df65255 100644
--- a/drivers/usb/cdns3/gadget.c
+++ b/drivers/usb/cdns3/gadget.c
@@ -1101,6 +1101,7 @@ static int cdns3_ep_run_transfer(struct cdns3_endpoint *priv_ep,
 	u16 total_tdl = 0;
 	struct scatterlist *s = NULL;
 	bool sg_supported = !!(request->num_mapped_sgs);
+	u16 td_size = 0;
 
 	if (priv_ep->type == USB_ENDPOINT_XFER_ISOC)
 		num_trb = priv_ep->interval;
@@ -1169,10 +1170,17 @@ static int cdns3_ep_run_transfer(struct cdns3_endpoint *priv_ep,
 
 	/* set incorrect Cycle Bit for first trb*/
 	control = priv_ep->pcs ? 0 : TRB_CYCLE;
+	trb->length = 0;
+	if (priv_dev->dev_ver >= DEV_VER_V2) {
+		td_size = DIV_ROUND_UP(request->length, priv_ep->endpoint.maxpacket);
+		if (priv_dev->gadget.speed == USB_SPEED_SUPER)
+			trb->length = TRB_TDL_SS_SIZE(td_size);
+		else
+			control |= TRB_TDL_HS_SIZE(td_size);
+	}
 
 	do {
 		u32 length;
-		u16 td_size = 0;
 
 		/* fill TRB */
 		control |= TRB_TYPE(TRB_NORMAL);
@@ -1184,20 +1192,12 @@ static int cdns3_ep_run_transfer(struct cdns3_endpoint *priv_ep,
 			length = request->length;
 		}
 
-		if (likely(priv_dev->dev_ver >= DEV_VER_V2))
-			td_size = DIV_ROUND_UP(length,
-					       priv_ep->endpoint.maxpacket);
-		else if (priv_ep->flags & EP_TDLCHK_EN)
+		if (priv_ep->flags & EP_TDLCHK_EN)
 			total_tdl += DIV_ROUND_UP(length,
 					       priv_ep->endpoint.maxpacket);
 
-		trb->length = cpu_to_le32(TRB_BURST_LEN(priv_ep->trb_burst_size) |
+		trb->length |= cpu_to_le32(TRB_BURST_LEN(priv_ep->trb_burst_size) |
 					TRB_LEN(length));
-		if (priv_dev->gadget.speed == USB_SPEED_SUPER)
-			trb->length |= cpu_to_le32(TRB_TDL_SS_SIZE(td_size));
-		else
-			control |= TRB_TDL_HS_SIZE(td_size);
-
 		pcs = priv_ep->pcs ? TRB_CYCLE : 0;
 
 		/*
@@ -1228,6 +1228,7 @@ static int cdns3_ep_run_transfer(struct cdns3_endpoint *priv_ep,
 		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);
 
 	trb = priv_req->trb;
-- 
2.17.1


  parent reply	other threads:[~2020-09-10  9:13 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 ` Peter Chen [this message]
2020-09-10  9:11 ` [PATCH v2 4/8] usb: cdns3: gadget: add CHAIN and ISP bit for sg list use case Peter Chen
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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