From: Marek Vasut <marex@denx.de>
To: u-boot@lists.denx.de
Subject: [U-Boot] [PATCH 2/7] usb: hub: Conditionally power on usb's root-hub ports
Date: Thu, 28 Mar 2013 15:28:03 +0100 [thread overview]
Message-ID: <201303281528.03266.marex@denx.de> (raw)
In-Reply-To: <1364376543-7526-3-git-send-email-gautam.vivek@samsung.com>
Dear Vivek Gautam,
> Power on root hubs' ports only when they are not yet powered on.
> Its seen with USB 3.0 ports that they are powered on after
> a H/W reset, as also reflected in XHCI spec (sec 4.3):
> "After a Chip Hardware Reset, HCRST, or commanded to the
> PLS = RxDetect state, all Root Hub ports shall be in Disconnected
> state, i.e. the port is powered on (PP = 1)"
>
> Signed-off-by: Amar <amarendra.xt@samsung.com>
> Signed-off-by: Vivek Gautam <gautam.vivek@samsung.com>
Just wondering if we shouldn't power-cycle all the ports instead -- aka. turn
them off and then turn all of them on again.
Best regards,
Marek Vasut
next prev parent reply other threads:[~2013-03-28 14:28 UTC|newest]
Thread overview: 39+ messages / expand[flat|nested] mbox.gz Atom feed top
2013-03-27 9:28 [U-Boot] [PATCH 0/7] usb: ss: Some fixes and cleanup for USB super-speed support Vivek Gautam
2013-03-27 9:28 ` [U-Boot] [PATCH 1/7] USB: Some cleanup prior to USB 3.0 interface addition Vivek Gautam
2013-03-28 14:26 ` Marek Vasut
2013-04-02 5:54 ` Vivek Gautam
2013-04-02 5:56 ` Vivek Gautam
2013-04-02 6:26 ` Marek Vasut
2013-04-02 6:37 ` Vivek Gautam
2013-04-02 6:46 ` Marek Vasut
2013-04-02 6:58 ` Vivek Gautam
2013-03-27 9:28 ` [U-Boot] [PATCH 2/7] usb: hub: Conditionally power on usb's root-hub ports Vivek Gautam
2013-03-28 14:28 ` Marek Vasut [this message]
2013-04-02 9:36 ` Vivek Gautam
2013-04-02 10:09 ` Marek Vasut
2013-04-02 10:29 ` Vivek Gautam
2013-04-02 10:33 ` Marek Vasut
2013-03-27 9:28 ` [U-Boot] [PATCH 3/7] usb: Update device class in usb device's descriptor Vivek Gautam
2013-03-28 14:28 ` Marek Vasut
2013-04-02 9:32 ` Vivek Gautam
2013-04-02 10:09 ` Marek Vasut
2013-04-02 10:30 ` Vivek Gautam
2013-03-27 9:29 ` [U-Boot] [PATCH 4/7] usb: hub: Fix enumration timeout Vivek Gautam
2013-03-28 3:33 ` Vipin Kumar
2013-04-01 20:13 ` Tom Rini
2013-04-02 4:55 ` Vivek Gautam
2013-04-02 5:12 ` Marek Vasut
2013-04-02 5:34 ` Vivek Gautam
2013-04-02 5:36 ` Vivek Gautam
2013-04-02 6:43 ` Marek Vasut
2013-03-27 9:29 ` [U-Boot] [PATCH 5/7] usb: hub: Increase device enumeration timeout for broken drives Vivek Gautam
2013-03-28 14:32 ` Marek Vasut
2013-04-02 9:33 ` Vivek Gautam
2013-04-02 13:53 ` Vivek Gautam
2013-04-04 3:58 ` Marek Vasut
2013-04-04 10:57 ` Vivek Gautam
2013-04-14 17:17 ` Marek Vasut
2013-03-27 9:29 ` [U-Boot] [PATCH 6/7] USB: SS: Add support for Super Speed USB interface Vivek Gautam
2013-03-28 14:35 ` Marek Vasut
2013-04-02 9:52 ` Vivek Gautam
2013-03-27 9:29 ` [U-Boot] [PATCH 7/7] usb: eth: Fix for updated usb interface descriptor structure Vivek Gautam
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