linux-kernel - [PATCH 1/3] dm9601: enable EP3 interrupt

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Date:	Thu, 10 Mar 2016 19:23:34 +0800
From:	Joseph CHANG <josright123@...il.com>
To:	Peter Korsgaard <jacmet@...site.dk>, netdev@...r.kernel.org,
	linux-usb@...r.kernel.org, linux-kernel@...r.kernel.org,
	Joseph CHANG <josright123@...il.com>
Cc:	Joseph Chang <joseph_chang@...icom.com.tw>
Subject: [PATCH 1/3] dm9601: enable EP3 interrupt

Enable chip's EP3 interrupt to get the link-up notify soon
immediately.

Signed-off-by: Joseph CHANG <josright123@...il.com>
---
 drivers/net/usb/dm9601.c | 6 ++++++
 1 file changed, 6 insertions(+)

diff --git a/drivers/net/usb/dm9601.c b/drivers/net/usb/dm9601.c
index 0b4bdd3..520de4f 100644
--- a/drivers/net/usb/dm9601.c
+++ b/drivers/net/usb/dm9601.c
@@ -46,6 +46,9 @@
 #define DM_GPR_DATA	0x1f
 #define DM_CHIP_ID	0x2c
 #define DM_MODE_CTRL	0x91	/* only on dm9620 */
+#define	DM_USB_CTRL	0xf4
+
+#define	USB_CTRL_EP3ACK	0x20
 
 /* chip id values */
 #define ID_DM9601	0
@@ -414,6 +417,9 @@ static int dm9601_bind(struct usbnet *dev, struct usb_interface *intf)
 			goto out;
 		}
 		dm_write_reg(dev, DM_MODE_CTRL, mode & 0x7f);
+
+		/* Always return 8-bytes data to host per interrupt-interval */
+		dm_write_reg(dev, DM_USB_CTRL, USB_CTRL_EP3ACK);
 	}
 
 	/* power up phy */
-- 
2.1.4