Linux Samsung SOC development
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From: Ben Dooks <ben-linux-elnMNo+KYs3YtjvyW6yDsg@public.gmane.org>
To: linux-samsung-soc-u79uwXL29TY76Z2rM5mHXA@public.gmane.org,
	linux-usb-u79uwXL29TY76Z2rM5mHXA@public.gmane.org
Cc: Ben Dooks <ben-linux-elnMNo+KYs3YtjvyW6yDsg@public.gmane.org>
Subject: [PATCH 04/11] USB: s3c-hsotg: SoftDisconnect minimum 3ms
Date: Wed, 26 May 2010 05:09:22 +0100	[thread overview]
Message-ID: <1274846966-23247-5-git-send-email-ben-linux@fluff.org> (raw)
In-Reply-To: <1274846966-23247-1-git-send-email-ben-linux-elnMNo+KYs3YtjvyW6yDsg@public.gmane.org>

The shortest period SoftDisconnect can be asserted for is 3 milliseconds
according to the V210 datasheet, so ensure that we add an msleep() to
the registration code to enforce this.

Signed-off-by: Ben Dooks <ben-linux-elnMNo+KYs3YtjvyW6yDsg@public.gmane.org>
---
 drivers/usb/gadget/s3c-hsotg.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/drivers/usb/gadget/s3c-hsotg.c b/drivers/usb/gadget/s3c-hsotg.c
index ed306ec..215beae 100644
--- a/drivers/usb/gadget/s3c-hsotg.c
+++ b/drivers/usb/gadget/s3c-hsotg.c
@@ -2602,6 +2602,9 @@ int usb_gadget_register_driver(struct usb_gadget_driver *driver)
 	writel(S3C_DCTL_CGOUTNak | S3C_DCTL_CGNPInNAK,
 	       hsotg->regs + S3C_DCTL);
 
+	/* must be at-least 3ms to allow bus to see disconnect */
+	msleep(3);
+
 	/* remove the soft-disconnect and let's go */
 	__bic32(hsotg->regs + S3C_DCTL, S3C_DCTL_SftDiscon);
 
-- 
1.6.3.3

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  parent reply	other threads:[~2010-05-26  4:09 UTC|newest]

Thread overview: 8+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2010-05-26  4:09 s3c-hsotg driver updates/fixes Ben Dooks
     [not found] ` <1274846966-23247-1-git-send-email-ben-linux-elnMNo+KYs3YtjvyW6yDsg@public.gmane.org>
2010-05-26  4:09   ` [PATCH 01/11] USB: s3c_hsotg: Add support for external USB clock Ben Dooks
2010-05-26  4:09   ` [PATCH 02/11] USB: s3c_hsotg: define USB_GADGET_DUALSPEED in Kconfig Ben Dooks
2010-05-26  4:09   ` Ben Dooks [this message]
2010-05-26  4:09   ` [PATCH 05/11] USB: s3c-hsotg: Ensure FIFOs are fully flushed after layout Ben Dooks
2010-05-26  4:09   ` [PATCH 07/11] USB: s3c-hsotg: Increase TX fifo limit Ben Dooks
2010-05-26  4:09 ` [PATCH 03/11] USB: s3c-hsotg: Ensure TX FIFO addresses setup when initialising FIFOs Ben Dooks
2010-05-26  4:09 ` [PATCH 06/11] USB: s3c-hsotg: Enable soft disconnect during initialization Ben Dooks

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