netdev - [PATCH 3/5] net: usb: ax88179_178a: restore state on resume

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Message-Id: <1658188689-30846-4-git-send-email-justinpopo6@gmail.com>
Date:   Mon, 18 Jul 2022 16:58:07 -0700
From:   justinpopo6@...il.com
To:     linux-kernel@...r.kernel.org, netdev@...r.kernel.org,
        linux-usb@...r.kernel.org, jannh@...gle.com, jackychou@...x.com.tw,
        jesionowskigreg@...il.com, joalonsof@...il.com,
        justinpopo6@...il.com, pabeni@...hat.com, kuba@...nel.org,
        edumazet@...gle.com, davem@...emloft.net, f.fainelli@...il.com
Cc:     justin.chen@...adcom.com
Subject: [PATCH 3/5] net: usb: ax88179_178a: restore state on resume

From: Justin Chen <justinpopo6@...il.com>

The hardware state was only partially restored, which meant certain
functionality was broken on resume. Do a full HW reset on resume to
fix this.

Signed-off-by: Justin Chen <justinpopo6@...il.com>
---
 drivers/net/usb/ax88179_178a.c | 27 +--------------------------
 1 file changed, 1 insertion(+), 26 deletions(-)

diff --git a/drivers/net/usb/ax88179_178a.c b/drivers/net/usb/ax88179_178a.c
index 8ca12db..60742bb 100644
--- a/drivers/net/usb/ax88179_178a.c
+++ b/drivers/net/usb/ax88179_178a.c
@@ -465,37 +465,12 @@ static int ax88179_auto_detach(struct usbnet *dev)
 static int ax88179_resume(struct usb_interface *intf)
 {
 	struct usbnet *dev = usb_get_intfdata(intf);
-	u16 tmp16;
-	u8 tmp8;
 
 	ax88179_set_pm_mode(dev, true);
 
 	usbnet_link_change(dev, 0, 0);
 
-	/* Power up ethernet PHY */
-	tmp16 = 0;
-	ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_PHYPWR_RSTCTL,
-			  2, 2, &tmp16);
-	udelay(1000);
-
-	tmp16 = AX_PHYPWR_RSTCTL_IPRL;
-	ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_PHYPWR_RSTCTL,
-			  2, 2, &tmp16);
-	msleep(200);
-
-	/* Ethernet PHY Auto Detach*/
-	ax88179_auto_detach(dev);
-
-	/* Enable clock */
-	ax88179_read_cmd(dev, AX_ACCESS_MAC,  AX_CLK_SELECT, 1, 1, &tmp8);
-	tmp8 |= AX_CLK_SELECT_ACS | AX_CLK_SELECT_BCS;
-	ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_CLK_SELECT, 1, 1, &tmp8);
-	msleep(100);
-
-	/* Configure RX control register => start operation */
-	tmp16 = AX_RX_CTL_DROPCRCERR | AX_RX_CTL_IPE | AX_RX_CTL_START |
-		AX_RX_CTL_AP | AX_RX_CTL_AMALL | AX_RX_CTL_AB;
-	ax88179_write_cmd(dev, AX_ACCESS_MAC, AX_RX_CTL, 2, 2, &tmp16);
+	ax88179_reset(dev);
 
 	ax88179_set_pm_mode(dev, false);
 
-- 
2.7.4