From mboxrd@z Thu Jan  1 00:00:00 1970
From: Hans de Goede <hdegoede@redhat.com>
Date: Fri, 27 Mar 2015 09:28:45 +0100
Subject: [U-Boot] Regression in usb-storage in u-boot 2015.04 ???
In-Reply-To: <5514FA72.4010004@atmel.com>
References: <55145945.4080201@redhat.com> <5514FA72.4010004@atmel.com>
Message-ID: <551514BD.7030808@redhat.com>
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To: u-boot@lists.denx.de

Hi,

On 27-03-15 07:36, Bo Shen wrote:
> Hi Hans,
>
> On 03/27/2015 03:08 AM, Hans de Goede wrote:
>> Hi,
>>
>> First of all I'm not sure this is a regression, but I'm afraid
>> I do not have time to dig deeper so I thought I should report
>> it anyways and then others can try to reproduce it.
>>
>> I'm seeing the following happen when using a usb stick
>> with a musb-new otg controller in host mode on an allwinner
>> tablet:
>>
>> sunxi# usb reset
>> resetting USB...
>> USB0:   scanning bus 0 for devices... 1 USB Device(s) found
>>         scanning usb for storage devices... error in inquiry
>> 0 Storage Device(s) found
>>
>> The interesting thing is that, the first "usb start" works
>> fine, this only happens on the second usb start (triggered
>> through a usb reset).
>>
>> This may be specific to using musb on sunxi, or to the
>> flashdrive I have but I thought I should report this
>> anyways. Esp. since usb otherwise works fine after a
>> usb reset, other devices (usb keyboards) continue to
>> work, and the descriptors of the usb drive do get read
>> correctly:
>>
>>
>> sunxi# usb info
>> 1: Mass Storage,  USB Revision 2.0
>>   - USB Flash Disk 4C0E960F
>>   - Class: (from Interface) Mass Storage
>>   - PacketSize: 64  Configurations: 1
>>   - Vendor: 0x058f  Product 0x6387 Version 1.3
>>     Configuration: 1
>>     - Interfaces: 1 Bus Powered 100mA
>>       Interface: 0
>>       - Alternate Setting 0, Endpoints: 2
>>       - Class Mass Storage, Transp. SCSI, Bulk only
>>       - Endpoint 1 Out Bulk MaxPacket 512
>>       - Endpoint 2 In Bulk MaxPacket 512
>>
>>
>> Perhaps someone can test the reproducer on another board
>> with usb:
>>
>> 1) plug in a usb drive
>> 2) do "usb start"
>> 3) should print that 1 storage device is found
>> 4) do "usb reset"
>> 5) should still print that 1 storage device is found,
>> but for me gives the error I mentioned above.
>
> I tested it OK with EHCI on Atmel sama5d4ek board. The following information for your reference.
> --->8---
> U-Boot SPL 2015.04-rc4-00067-gf643d92 (Mar 27 2015 - 14:31:49)
>
>
> U-Boot 2015.04-rc4-00067-gf643d92 (Mar 27 2015 - 14:31:49)
>
> CPU: SAMA5D44
> Crystal frequency:       12 MHz
> CPU clock        :      528 MHz
> Master clock     :      176 MHz
> DRAM:  512 MiB
> NAND:  512 MiB
> MMC:   mci: 0
> In:    serial
> Out:   serial
> Err:   serial
> Net:   gmac0, usb_ether
> Error: usb_ether address not set.
>
> Hit any key to stop autoboot:  0
> U-Boot> usb start
> starting USB...
> USB0:   USB EHCI 1.00
> scanning bus 0 for devices... 2 USB Device(s) found
>         scanning usb for storage devices... 1 Storage Device(s) found
> U-Boot> usb reset
> resetting USB...
> USB0:   USB EHCI 1.00
> scanning bus 0 for devices... 2 USB Device(s) found
>         scanning usb for storage devices... 1 Storage Device(s) found
> U-Boot>
> ---8<---

Ok, thanks for testing then@least this is not something which hits
all boards, likely is some musb in host mode issue, which we probably
have had for a long time now but I just noticed.

Regards,

Hans