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From: Dmitry Voytik <voytikd@gmail.com>
To: Sascha Hauer <s.hauer@pengutronix.de>
Cc: Dmitry Voytik <voytikd@gmail.com>, barebox@lists.infradead.org
Subject: [PATCH] usb: ehci-hcd: Correct CLEAR_FEATURE code
Date: Thu, 16 Oct 2014 16:52:20 +0400	[thread overview]
Message-ID: <1413463940-9651-1-git-send-email-voytikd@gmail.com> (raw)

This commit broke USB on olinuxino board:

  87b9bea USB: host: hub: Use usb_hub_power_on from U-Boot

This patch was ported from U-Boot with small changes. See discussion:
http://lists.denx.de/pipermail/u-boot/2013-May/153920.html

The root cause seems to be a missing mask and missing 'break' in
ehci-hcd.c. Fix both.

Signed-off-by: Dmitry Voytik <voytikd@gmail.com>
---
 drivers/usb/host/ehci-hcd.c | 10 ++++++----
 1 file changed, 6 insertions(+), 4 deletions(-)

diff --git a/drivers/usb/host/ehci-hcd.c b/drivers/usb/host/ehci-hcd.c
index 5624552..d2e1296 100644
--- a/drivers/usb/host/ehci-hcd.c
+++ b/drivers/usb/host/ehci-hcd.c
@@ -675,21 +675,23 @@ ehci_submit_root(struct usb_device *dev, unsigned long pipe, void *buffer,
 		break;
 	case USB_REQ_CLEAR_FEATURE | ((USB_DIR_OUT | USB_RT_PORT) << 8):
 		reg = ehci_readl(status_reg);
+		reg &= ~EHCI_PS_CLEAR;
 		switch (le16_to_cpu(req->value)) {
 		case USB_PORT_FEAT_ENABLE:
 			reg &= ~EHCI_PS_PE;
 			break;
 		case USB_PORT_FEAT_C_ENABLE:
-			reg = (reg & ~EHCI_PS_CLEAR) | EHCI_PS_PE;
+			reg |= EHCI_PS_PEC;
 			break;
 		case USB_PORT_FEAT_POWER:
 			if (HCS_PPC(ehci_readl(&ehci->hccr->cr_hcsparams)))
-				reg = reg & ~(EHCI_PS_CLEAR | EHCI_PS_PP);
+				reg &= ~ EHCI_PS_PP;
+			break;
 		case USB_PORT_FEAT_C_CONNECTION:
-			reg = (reg & ~EHCI_PS_CLEAR) | EHCI_PS_CSC;
+			reg |= EHCI_PS_CSC;
 			break;
 		case USB_PORT_FEAT_OVER_CURRENT:
-			reg = (reg & ~EHCI_PS_CLEAR) | EHCI_PS_OCC;
+			reg |= EHCI_PS_OCC;
 			break;
 		case USB_PORT_FEAT_C_RESET:
 			ehci->portreset &= ~(1 << le16_to_cpu(req->index));
-- 
1.9.1


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             reply	other threads:[~2014-10-16 12:53 UTC|newest]

Thread overview: 2+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2014-10-16 12:52 Dmitry Voytik [this message]
2014-10-21 10:59 ` Sascha Hauer

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