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From: Ryan Chen <ryan_chen@aspeedtech.com>
To: <BMC-SW@aspeedtech.com>, Felipe Balbi <balbi@kernel.org>,
	"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
	Joel Stanley <joel@jms.id.au>, Andrew Jeffery <andrew@aj.id.au>,
	<linux-usb@vger.kernel.org>,
	<linux-arm-kernel@lists.infradead.org>,
	<linux-aspeed@lists.ozlabs.org>, <linux-kernel@vger.kernel.org>
Cc: Ryan Chen <ryan_chen@aspeedtech.com>
Subject: [PATCH 1/1] usb: gadget: aspeed: fix stop dma register setting.
Date: Fri, 8 Jan 2021 16:12:38 +0800	[thread overview]
Message-ID: <20210108081238.10199-2-ryan_chen@aspeedtech.com> (raw)
In-Reply-To: <20210108081238.10199-1-ryan_chen@aspeedtech.com>

The vhub engine has two dma mode, one is descriptor list, another
is single stage DMA. Each mode has different stop register setting.
Descriptor list operation (bit2) : 0 disable reset, 1: enable reset
Single mode operation (bit0) : 0 : disable, 1: enable

Signed-off-by: Ryan Chen <ryan_chen@aspeedtech.com>
---
 drivers/usb/gadget/udc/aspeed-vhub/epn.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/gadget/udc/aspeed-vhub/epn.c b/drivers/usb/gadget/udc/aspeed-vhub/epn.c
index 0bd6b20435b8..02d8bfae58fb 100644
--- a/drivers/usb/gadget/udc/aspeed-vhub/epn.c
+++ b/drivers/usb/gadget/udc/aspeed-vhub/epn.c
@@ -420,7 +420,10 @@ static void ast_vhub_stop_active_req(struct ast_vhub_ep *ep,
 	u32 state, reg, loops;
 
 	/* Stop DMA activity */
-	writel(0, ep->epn.regs + AST_VHUB_EP_DMA_CTLSTAT);
+	if (ep->epn.desc_mode)
+		writel(VHUB_EP_DMA_CTRL_RESET, ep->epn.regs + AST_VHUB_EP_DMA_CTLSTAT);
+	else
+		writel(0, ep->epn.regs + AST_VHUB_EP_DMA_CTLSTAT);
 
 	/* Wait for it to complete */
 	for (loops = 0; loops < 1000; loops++) {
-- 
2.17.1


WARNING: multiple messages have this Message-ID (diff)
From: Ryan Chen <ryan_chen@aspeedtech.com>
To: <BMC-SW@aspeedtech.com>, Felipe Balbi <balbi@kernel.org>,
	"Greg Kroah-Hartman" <gregkh@linuxfoundation.org>,
	Joel Stanley <joel@jms.id.au>, Andrew Jeffery <andrew@aj.id.au>,
	<linux-usb@vger.kernel.org>,
	<linux-arm-kernel@lists.infradead.org>,
	<linux-aspeed@lists.ozlabs.org>, <linux-kernel@vger.kernel.org>
Cc: Ryan Chen <ryan_chen@aspeedtech.com>
Subject: [PATCH 1/1] usb: gadget: aspeed: fix stop dma register setting.
Date: Fri, 8 Jan 2021 16:12:38 +0800	[thread overview]
Message-ID: <20210108081238.10199-2-ryan_chen@aspeedtech.com> (raw)
In-Reply-To: <20210108081238.10199-1-ryan_chen@aspeedtech.com>

The vhub engine has two dma mode, one is descriptor list, another
is single stage DMA. Each mode has different stop register setting.
Descriptor list operation (bit2) : 0 disable reset, 1: enable reset
Single mode operation (bit0) : 0 : disable, 1: enable

Signed-off-by: Ryan Chen <ryan_chen@aspeedtech.com>
---
 drivers/usb/gadget/udc/aspeed-vhub/epn.c | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/drivers/usb/gadget/udc/aspeed-vhub/epn.c b/drivers/usb/gadget/udc/aspeed-vhub/epn.c
index 0bd6b20435b8..02d8bfae58fb 100644
--- a/drivers/usb/gadget/udc/aspeed-vhub/epn.c
+++ b/drivers/usb/gadget/udc/aspeed-vhub/epn.c
@@ -420,7 +420,10 @@ static void ast_vhub_stop_active_req(struct ast_vhub_ep *ep,
 	u32 state, reg, loops;
 
 	/* Stop DMA activity */
-	writel(0, ep->epn.regs + AST_VHUB_EP_DMA_CTLSTAT);
+	if (ep->epn.desc_mode)
+		writel(VHUB_EP_DMA_CTRL_RESET, ep->epn.regs + AST_VHUB_EP_DMA_CTLSTAT);
+	else
+		writel(0, ep->epn.regs + AST_VHUB_EP_DMA_CTLSTAT);
 
 	/* Wait for it to complete */
 	for (loops = 0; loops < 1000; loops++) {
-- 
2.17.1


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  reply	other threads:[~2021-01-08  8:15 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-08  8:12 [PATCH 0/1] Fix vhub engine stop dma register setting Ryan Chen
2021-01-08  8:12 ` Ryan Chen
2021-01-08  8:12 ` Ryan Chen [this message]
2021-01-08  8:12   ` [PATCH 1/1] usb: gadget: aspeed: fix " Ryan Chen
2021-01-08 12:21   ` Felipe Balbi
2021-01-08 12:21     ` Felipe Balbi
2021-01-11  2:24   ` Joel Stanley
2021-01-11  2:24     ` Joel Stanley

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