[U-Boot] usb: Fail to get descriptor for USB 2.0 device

[U-Boot] usb: Fail to get descriptor for USB 2.0 device

[DATACOM - Paulo.Zaneti]

Hi,

When trying to migrate a board from u-boot version 2016.09 to version 
2018.03, I found a problem with a USB 2.0 device which used to work on 
version 2016.09.

In u-boot version 2016.09 the device appears like this:

2: Mass Storage,  USB Revision 2.0
  - SanDisk Cruzer Blade 200443243002FB509E64
  - Class: (from Interface) Mass Storage
  - PacketSize: 64  Configurations: 1
  - Vendor: 0x0781  Product 0x5567 Version 1.38
    Configuration: 1
    - Interfaces: 1 Bus Powered 200mA
      Interface: 0
      - Alternate Setting 0, Endpoints: 2
      - Class Mass Storage, Transp. SCSI, Bulk only
      - Endpoint 1 In Bulk MaxPacket 512
      - Endpoint 2 Out Bulk MaxPacket 512


But in version 2018.03 I just can't start usb. It fails with following 
error:

=> usb start
starting USB...
USB0:   USB EHCI 1.00
scanning bus 0 for devices... EHCI timed out on TD - token=0x80008c80
unable to get device descriptor (error=-1)
1 USB Device(s) found
USB1:   USB EHCI 1.00
scanning bus 1 for devices... 1 USB Device(s) found
        scanning usb for storage devices... 0 Storage Device(s) found


I did a "git bisect" and found that this problem is related to the 
following commit:

c008faa usb: Only get 64 bytes device descriptor for full speed devices

I am not an expert on USB, so I would like to ask for help on this issue.

In u-boot v2018.03, file common/usb.c, line 973, shouldn't the 
comparison be like this:

         if (do_read && dev->speed >= USB_SPEED_FULL) {

or, at list:

         if (do_read && (dev->speed == USB_SPEED_FULL || dev->speed == 
USB_SPEED_HIGH)) {


I would submit a patch for this, but I lack on USB knowledge for 
explaining the patch.

[U-Boot] usb: Fail to get descriptor for USB 2.0 device

[Marek Vasut]

On 05/23/2018 07:00 PM, DATACOM - Paulo.Zaneti wrote:
> Hi,

Hi,

> When trying to migrate a board from u-boot version 2016.09 to version
> 2018.03, I found a problem with a USB 2.0 device which used to work on
> version 2016.09.

Does it still happen in u-boot/master ?

> In u-boot version 2016.09 the device appears like this:
> 
> 2: Mass Storage,  USB Revision 2.0
>  - SanDisk Cruzer Blade 200443243002FB509E64
>  - Class: (from Interface) Mass Storage
>  - PacketSize: 64  Configurations: 1
>  - Vendor: 0x0781  Product 0x5567 Version 1.38
>    Configuration: 1
>    - Interfaces: 1 Bus Powered 200mA
>      Interface: 0
>      - Alternate Setting 0, Endpoints: 2
>      - Class Mass Storage, Transp. SCSI, Bulk only
>      - Endpoint 1 In Bulk MaxPacket 512
>      - Endpoint 2 Out Bulk MaxPacket 512
> 
> 
> But in version 2018.03 I just can't start usb. It fails with following
> error:
> 
> => usb start
> starting USB...
> USB0:   USB EHCI 1.00
> scanning bus 0 for devices... EHCI timed out on TD - token=0x80008c80
> unable to get device descriptor (error=-1)
> 1 USB Device(s) found
> USB1:   USB EHCI 1.00
> scanning bus 1 for devices... 1 USB Device(s) found
>        scanning usb for storage devices... 0 Storage Device(s) found
> 
> 
> I did a "git bisect" and found that this problem is related to the
> following commit:
> 
> c008faa usb: Only get 64 bytes device descriptor for full speed devices
> 
> I am not an expert on USB, so I would like to ask for help on this issue.
> 
> In u-boot v2018.03, file common/usb.c, line 973, shouldn't the
> comparison be like this:
> 
>         if (do_read && dev->speed >= USB_SPEED_FULL) {
> 
> or, at list:
> 
>         if (do_read && (dev->speed == USB_SPEED_FULL || dev->speed ==
> USB_SPEED_HIGH)) {
> 
> 
> I would submit a patch for this, but I lack on USB knowledge for
> explaining the patch.
> 


-- 
Best regards,
Marek Vasut

[U-Boot] usb: Fail to get descriptor for USB 2.0 device

[DATACOM - Paulo.Zaneti]

On 23/05/2018 14:03, Marek Vasut wrote:
> On 05/23/2018 07:00 PM, DATACOM - Paulo.Zaneti wrote:
>> Hi,
> Hi,
>
>> When trying to migrate a board from u-boot version 2016.09 to version
>> 2018.03, I found a problem with a USB 2.0 device which used to work on
>> version 2016.09.
> Does it still happen in u-boot/master ?
Yes, it still happens.

I just tested it with the following commit:
dca268a .travis.yml: Further optimizations
>
>> In u-boot version 2016.09 the device appears like this:
>>
>> 2: Mass Storage,  USB Revision 2.0
>>   - SanDisk Cruzer Blade 200443243002FB509E64
>>   - Class: (from Interface) Mass Storage
>>   - PacketSize: 64  Configurations: 1
>>   - Vendor: 0x0781  Product 0x5567 Version 1.38
>>     Configuration: 1
>>     - Interfaces: 1 Bus Powered 200mA
>>       Interface: 0
>>       - Alternate Setting 0, Endpoints: 2
>>       - Class Mass Storage, Transp. SCSI, Bulk only
>>       - Endpoint 1 In Bulk MaxPacket 512
>>       - Endpoint 2 Out Bulk MaxPacket 512
>>
>>
>> But in version 2018.03 I just can't start usb. It fails with following
>> error:
>>
>> => usb start
>> starting USB...
>> USB0:   USB EHCI 1.00
>> scanning bus 0 for devices... EHCI timed out on TD - token=0x80008c80
>> unable to get device descriptor (error=-1)
>> 1 USB Device(s) found
>> USB1:   USB EHCI 1.00
>> scanning bus 1 for devices... 1 USB Device(s) found
>>         scanning usb for storage devices... 0 Storage Device(s) found
>>
>>
>> I did a "git bisect" and found that this problem is related to the
>> following commit:
>>
>> c008faa usb: Only get 64 bytes device descriptor for full speed devices
>>
>> I am not an expert on USB, so I would like to ask for help on this issue.
>>
>> In u-boot v2018.03, file common/usb.c, line 973, shouldn't the
>> comparison be like this:
>>
>>          if (do_read && dev->speed >= USB_SPEED_FULL) {
>>
>> or, at list:
>>
>>          if (do_read && (dev->speed == USB_SPEED_FULL || dev->speed ==
>> USB_SPEED_HIGH)) {
>>
>>
>> I would submit a patch for this, but I lack on USB knowledge for
>> explaining the patch.
>>
>

[U-Boot] usb: Fail to get descriptor for USB 2.0 device

[Marek Vasut]

On 05/23/2018 07:37 PM, DATACOM - Paulo.Zaneti wrote:
> 
> 
> On 23/05/2018 14:03, Marek Vasut wrote:
>> On 05/23/2018 07:00 PM, DATACOM - Paulo.Zaneti wrote:
>>> Hi,
>> Hi,
>>
>>> When trying to migrate a board from u-boot version 2016.09 to version
>>> 2018.03, I found a problem with a USB 2.0 device which used to work on
>>> version 2016.09.
>> Does it still happen in u-boot/master ?
> Yes, it still happens.
> 
> I just tested it with the following commit:
> dca268a .travis.yml: Further optimizations
>>
>>> In u-boot version 2016.09 the device appears like this:
>>>
>>> 2: Mass Storage,  USB Revision 2.0
>>>   - SanDisk Cruzer Blade 200443243002FB509E64

Let me guess, is this a DWC2-based host ? You didn't mention which SoC
or USB controller it is.

Cfr https://lists.denx.de/pipermail/u-boot/2016-January/240090.html ,
DWC2 has problems with those sandisk sticks.

-- 
Best regards,
Marek Vasut

[U-Boot] usb: Fail to get descriptor for USB 2.0 device

[DATACOM - Paulo.Zaneti]

On 23/05/2018 14:43, Marek Vasut wrote:
> On 05/23/2018 07:37 PM, DATACOM - Paulo.Zaneti wrote:
>>
>> On 23/05/2018 14:03, Marek Vasut wrote:
>>> On 05/23/2018 07:00 PM, DATACOM - Paulo.Zaneti wrote:
>>>> Hi,
>>> Hi,
>>>
>>>> When trying to migrate a board from u-boot version 2016.09 to version
>>>> 2018.03, I found a problem with a USB 2.0 device which used to work on
>>>> version 2016.09.
>>> Does it still happen in u-boot/master ?
>> Yes, it still happens.
>>
>> I just tested it with the following commit:
>> dca268a .travis.yml: Further optimizations
>>>> In u-boot version 2016.09 the device appears like this:
>>>>
>>>> 2: Mass Storage,  USB Revision 2.0
>>>>    - SanDisk Cruzer Blade 200443243002FB509E64
> Let me guess, is this a DWC2-based host ? You didn't mention which SoC
> or USB controller it is.
>
> Cfr https://lists.denx.de/pipermail/u-boot/2016-January/240090.html ,
> DWC2 has problems with those sandisk sticks.
No, it is a NXP T1024 SoC.
Do you think it may be a problem with the SoC or NXP USB host driver ?

[U-Boot] usb: Fail to get descriptor for USB 2.0 device

[Marek Vasut]

On 05/23/2018 07:52 PM, DATACOM - Paulo.Zaneti wrote:
> 
> 
> On 23/05/2018 14:43, Marek Vasut wrote:
>> On 05/23/2018 07:37 PM, DATACOM - Paulo.Zaneti wrote:
>>>
>>> On 23/05/2018 14:03, Marek Vasut wrote:
>>>> On 05/23/2018 07:00 PM, DATACOM - Paulo.Zaneti wrote:
>>>>> Hi,
>>>> Hi,
>>>>
>>>>> When trying to migrate a board from u-boot version 2016.09 to version
>>>>> 2018.03, I found a problem with a USB 2.0 device which used to work on
>>>>> version 2016.09.
>>>> Does it still happen in u-boot/master ?
>>> Yes, it still happens.
>>>
>>> I just tested it with the following commit:
>>> dca268a .travis.yml: Further optimizations
>>>>> In u-boot version 2016.09 the device appears like this:
>>>>>
>>>>> 2: Mass Storage,  USB Revision 2.0
>>>>>    - SanDisk Cruzer Blade 200443243002FB509E64
>> Let me guess, is this a DWC2-based host ? You didn't mention which SoC
>> or USB controller it is.
>>
>> Cfr https://lists.denx.de/pipermail/u-boot/2016-January/240090.html ,
>> DWC2 has problems with those sandisk sticks.
> No, it is a NXP T1024 SoC.
> Do you think it may be a problem with the SoC or NXP USB host driver ?
> 
So that's chipidea ? That one should be reasonably sane.

Submit the patch you had in mind and let's see what happens.

-- 
Best regards,
Marek Vasut

[U-Boot] usb: Fail to get descriptor for USB 2.0 device

[DATACOM - Paulo.Zaneti]

On 23/05/2018 15:00, Marek Vasut wrote:
> On 05/23/2018 07:52 PM, DATACOM - Paulo.Zaneti wrote:
>>
>> On 23/05/2018 14:43, Marek Vasut wrote:
>>> On 05/23/2018 07:37 PM, DATACOM - Paulo.Zaneti wrote:
>>>> On 23/05/2018 14:03, Marek Vasut wrote:
>>>>> On 05/23/2018 07:00 PM, DATACOM - Paulo.Zaneti wrote:
>>>>>> Hi,
>>>>> Hi,
>>>>>
>>>>>> When trying to migrate a board from u-boot version 2016.09 to version
>>>>>> 2018.03, I found a problem with a USB 2.0 device which used to work on
>>>>>> version 2016.09.
>>>>> Does it still happen in u-boot/master ?
>>>> Yes, it still happens.
>>>>
>>>> I just tested it with the following commit:
>>>> dca268a .travis.yml: Further optimizations
>>>>>> In u-boot version 2016.09 the device appears like this:
>>>>>>
>>>>>> 2: Mass Storage,  USB Revision 2.0
>>>>>>     - SanDisk Cruzer Blade 200443243002FB509E64
>>> Let me guess, is this a DWC2-based host ? You didn't mention which SoC
>>> or USB controller it is.
>>>
>>> Cfr https://lists.denx.de/pipermail/u-boot/2016-January/240090.html ,
>>> DWC2 has problems with those sandisk sticks.
>> No, it is a NXP T1024 SoC.
>> Do you think it may be a problem with the SoC or NXP USB host driver ?
>>
> So that's chipidea ? That one should be reasonably sane.
I don't think so. It uses following drivers:
   drivers/usb/host/ehci-fsl.c
   drivers/usb/host/ehci-hcd.c

>
> Submit the patch you had in mind and let's see what happens.
I just noticed that this stick needs more time after the 
usb_set_address() call.
I increased the mdelay(10) to mdelay(20) and the "usb start" command worked.
But the problem is that I am still not convinced that this should be the 
solution.
>

[U-Boot] usb: Fail to get descriptor for USB 2.0 device

[Marek Vasut]

On 05/23/2018 10:51 PM, DATACOM - Paulo.Zaneti wrote:
> 
> 
> On 23/05/2018 15:00, Marek Vasut wrote:
>> On 05/23/2018 07:52 PM, DATACOM - Paulo.Zaneti wrote:
>>>
>>> On 23/05/2018 14:43, Marek Vasut wrote:
>>>> On 05/23/2018 07:37 PM, DATACOM - Paulo.Zaneti wrote:
>>>>> On 23/05/2018 14:03, Marek Vasut wrote:
>>>>>> On 05/23/2018 07:00 PM, DATACOM - Paulo.Zaneti wrote:
>>>>>>> Hi,
>>>>>> Hi,
>>>>>>
>>>>>>> When trying to migrate a board from u-boot version 2016.09 to
>>>>>>> version
>>>>>>> 2018.03, I found a problem with a USB 2.0 device which used to
>>>>>>> work on
>>>>>>> version 2016.09.
>>>>>> Does it still happen in u-boot/master ?
>>>>> Yes, it still happens.
>>>>>
>>>>> I just tested it with the following commit:
>>>>> dca268a .travis.yml: Further optimizations
>>>>>>> In u-boot version 2016.09 the device appears like this:
>>>>>>>
>>>>>>> 2: Mass Storage,  USB Revision 2.0
>>>>>>>     - SanDisk Cruzer Blade 200443243002FB509E64
>>>> Let me guess, is this a DWC2-based host ? You didn't mention which SoC
>>>> or USB controller it is.
>>>>
>>>> Cfr https://lists.denx.de/pipermail/u-boot/2016-January/240090.html ,
>>>> DWC2 has problems with those sandisk sticks.
>>> No, it is a NXP T1024 SoC.
>>> Do you think it may be a problem with the SoC or NXP USB host driver ?
>>>
>> So that's chipidea ? That one should be reasonably sane.
> I don't think so. It uses following drivers:
>   drivers/usb/host/ehci-fsl.c
>   drivers/usb/host/ehci-hcd.c

Should be chipidea IP.

>> Submit the patch you had in mind and let's see what happens.
> I just noticed that this stick needs more time after the
> usb_set_address() call.
> I increased the mdelay(10) to mdelay(20) and the "usb start" command
> worked.
> But the problem is that I am still not convinced that this should be the
> solution.

Try setenv usb_pgood_delay 10000 ; usb reset then ?

-- 
Best regards,
Marek Vasut

[U-Boot] usb: Fail to get descriptor for USB 2.0 device

[Bin Meng]

Hi,

On Thu, May 24, 2018 at 4:51 AM, DATACOM - Paulo.Zaneti
<paulo.zaneti@datacom.com.br> wrote:
>
>
> On 23/05/2018 15:00, Marek Vasut wrote:
>>
>> On 05/23/2018 07:52 PM, DATACOM - Paulo.Zaneti wrote:
>>>
>>>
>>> On 23/05/2018 14:43, Marek Vasut wrote:
>>>>
>>>> On 05/23/2018 07:37 PM, DATACOM - Paulo.Zaneti wrote:
>>>>>
>>>>> On 23/05/2018 14:03, Marek Vasut wrote:
>>>>>>
>>>>>> On 05/23/2018 07:00 PM, DATACOM - Paulo.Zaneti wrote:
>>>>>>>
>>>>>>> Hi,
>>>>>>
>>>>>> Hi,
>>>>>>
>>>>>>> When trying to migrate a board from u-boot version 2016.09 to version
>>>>>>> 2018.03, I found a problem with a USB 2.0 device which used to work
>>>>>>> on
>>>>>>> version 2016.09.
>>>>>>
>>>>>> Does it still happen in u-boot/master ?
>>>>>
>>>>> Yes, it still happens.
>>>>>
>>>>> I just tested it with the following commit:
>>>>> dca268a .travis.yml: Further optimizations
>>>>>>>
>>>>>>> In u-boot version 2016.09 the device appears like this:
>>>>>>>
>>>>>>> 2: Mass Storage,  USB Revision 2.0
>>>>>>>     - SanDisk Cruzer Blade 200443243002FB509E64
>>>>
>>>> Let me guess, is this a DWC2-based host ? You didn't mention which SoC
>>>> or USB controller it is.
>>>>
>>>> Cfr https://lists.denx.de/pipermail/u-boot/2016-January/240090.html ,
>>>> DWC2 has problems with those sandisk sticks.
>>>
>>> No, it is a NXP T1024 SoC.
>>> Do you think it may be a problem with the SoC or NXP USB host driver ?
>>>
>> So that's chipidea ? That one should be reasonably sane.
>
> I don't think so. It uses following drivers:
>   drivers/usb/host/ehci-fsl.c
>   drivers/usb/host/ehci-hcd.c
>
>>
>> Submit the patch you had in mind and let's see what happens.
>
> I just noticed that this stick needs more time after the usb_set_address()
> call.
> I increased the mdelay(10) to mdelay(20) and the "usb start" command worked.
> But the problem is that I am still not convinced that this should be the
> solution.
>

Agreed. Can you bisect to see which commit broke your stick?

Regards,
Bin

[U-Boot] usb: Fail to get descriptor for USB 2.0 device

[DATACOM - Paulo.Zaneti]

On 23/05/2018 20:40, Bin Meng wrote:
> Hi,
>
> On Thu, May 24, 2018 at 4:51 AM, DATACOM - Paulo.Zaneti
> <paulo.zaneti@datacom.com.br> wrote:
>>
>> On 23/05/2018 15:00, Marek Vasut wrote:
>>> On 05/23/2018 07:52 PM, DATACOM - Paulo.Zaneti wrote:
>>>>
>>>> On 23/05/2018 14:43, Marek Vasut wrote:
>>>>> On 05/23/2018 07:37 PM, DATACOM - Paulo.Zaneti wrote:
>>>>>> On 23/05/2018 14:03, Marek Vasut wrote:
>>>>>>> On 05/23/2018 07:00 PM, DATACOM - Paulo.Zaneti wrote:
>>>>>>>> Hi,
>>>>>>> Hi,
>>>>>>>
>>>>>>>> When trying to migrate a board from u-boot version 2016.09 to version
>>>>>>>> 2018.03, I found a problem with a USB 2.0 device which used to work
>>>>>>>> on
>>>>>>>> version 2016.09.
>>>>>>> Does it still happen in u-boot/master ?
>>>>>> Yes, it still happens.
>>>>>>
>>>>>> I just tested it with the following commit:
>>>>>> dca268a .travis.yml: Further optimizations
>>>>>>>> In u-boot version 2016.09 the device appears like this:
>>>>>>>>
>>>>>>>> 2: Mass Storage,  USB Revision 2.0
>>>>>>>>      - SanDisk Cruzer Blade 200443243002FB509E64
>>>>> Let me guess, is this a DWC2-based host ? You didn't mention which SoC
>>>>> or USB controller it is.
>>>>>
>>>>> Cfr https://lists.denx.de/pipermail/u-boot/2016-January/240090.html ,
>>>>> DWC2 has problems with those sandisk sticks.
>>>> No, it is a NXP T1024 SoC.
>>>> Do you think it may be a problem with the SoC or NXP USB host driver ?
>>>>
>>> So that's chipidea ? That one should be reasonably sane.
>> I don't think so. It uses following drivers:
>>    drivers/usb/host/ehci-fsl.c
>>    drivers/usb/host/ehci-hcd.c
>>
>>> Submit the patch you had in mind and let's see what happens.
>> I just noticed that this stick needs more time after the usb_set_address()
>> call.
>> I increased the mdelay(10) to mdelay(20) and the "usb start" command worked.
>> But the problem is that I am still not convinced that this should be the
>> solution.
>>
> Agreed. Can you bisect to see which commit broke your stick?
Yes. The commit which broke my stick is:

commit c008faa77358bb5b313696dd1d5bb8afa03a6ca2
Author: Bin Meng <bmeng.cn@gmail.com>
Date:   Mon Sep 18 06:40:42 2017 -0700

     usb: Only get 64 bytes device descriptor for full speed devices


My first guess was that this commit should be adapted to 
"get_descriptor_len()" for USB_SPEED_HIGH too.

But then, I realized that I can bypass this problem by increasing the 
mdelay() after usb_set_address() from 10 to 20 msec.

So, I think commit c008faa77358bb5b313696dd1d5bb8afa03a6ca2 is not the 
offender one. It probably uncovered another problem with this stick.

I will try to get a better understanding before submitting a patch.
>
> Regards,
> Bin
Thank you guys for all the help. I hope I can contribute back too.

Regards,
Paulo

[U-Boot] usb: Fail to get descriptor for USB 2.0 device

[Marek Vasut]

On 05/24/2018 06:23 PM, DATACOM - Paulo.Zaneti wrote:
> 
> 
> On 23/05/2018 20:40, Bin Meng wrote:
>> Hi,
>>
>> On Thu, May 24, 2018 at 4:51 AM, DATACOM - Paulo.Zaneti
>> <paulo.zaneti@datacom.com.br> wrote:
>>>
>>> On 23/05/2018 15:00, Marek Vasut wrote:
>>>> On 05/23/2018 07:52 PM, DATACOM - Paulo.Zaneti wrote:
>>>>>
>>>>> On 23/05/2018 14:43, Marek Vasut wrote:
>>>>>> On 05/23/2018 07:37 PM, DATACOM - Paulo.Zaneti wrote:
>>>>>>> On 23/05/2018 14:03, Marek Vasut wrote:
>>>>>>>> On 05/23/2018 07:00 PM, DATACOM - Paulo.Zaneti wrote:
>>>>>>>>> Hi,
>>>>>>>> Hi,
>>>>>>>>
>>>>>>>>> When trying to migrate a board from u-boot version 2016.09 to
>>>>>>>>> version
>>>>>>>>> 2018.03, I found a problem with a USB 2.0 device which used to
>>>>>>>>> work
>>>>>>>>> on
>>>>>>>>> version 2016.09.
>>>>>>>> Does it still happen in u-boot/master ?
>>>>>>> Yes, it still happens.
>>>>>>>
>>>>>>> I just tested it with the following commit:
>>>>>>> dca268a .travis.yml: Further optimizations
>>>>>>>>> In u-boot version 2016.09 the device appears like this:
>>>>>>>>>
>>>>>>>>> 2: Mass Storage,  USB Revision 2.0
>>>>>>>>>      - SanDisk Cruzer Blade 200443243002FB509E64
>>>>>> Let me guess, is this a DWC2-based host ? You didn't mention which
>>>>>> SoC
>>>>>> or USB controller it is.
>>>>>>
>>>>>> Cfr https://lists.denx.de/pipermail/u-boot/2016-January/240090.html ,
>>>>>> DWC2 has problems with those sandisk sticks.
>>>>> No, it is a NXP T1024 SoC.
>>>>> Do you think it may be a problem with the SoC or NXP USB host driver ?
>>>>>
>>>> So that's chipidea ? That one should be reasonably sane.
>>> I don't think so. It uses following drivers:
>>>    drivers/usb/host/ehci-fsl.c
>>>    drivers/usb/host/ehci-hcd.c
>>>
>>>> Submit the patch you had in mind and let's see what happens.
>>> I just noticed that this stick needs more time after the
>>> usb_set_address()
>>> call.
>>> I increased the mdelay(10) to mdelay(20) and the "usb start" command
>>> worked.
>>> But the problem is that I am still not convinced that this should be the
>>> solution.
>>>
>> Agreed. Can you bisect to see which commit broke your stick?
> Yes. The commit which broke my stick is:
> 
> commit c008faa77358bb5b313696dd1d5bb8afa03a6ca2
> Author: Bin Meng <bmeng.cn@gmail.com>
> Date:   Mon Sep 18 06:40:42 2017 -0700
> 
>     usb: Only get 64 bytes device descriptor for full speed devices
> 
> 
> My first guess was that this commit should be adapted to
> "get_descriptor_len()" for USB_SPEED_HIGH too.
> 
> But then, I realized that I can bypass this problem by increasing the
> mdelay() after usb_set_address() from 10 to 20 msec.
> 
> So, I think commit c008faa77358bb5b313696dd1d5bb8afa03a6ca2 is not the
> offender one. It probably uncovered another problem with this stick.

That particular lineup of sandisk sticks is trash, I have a few of those
here for testing too.

> I will try to get a better understanding before submitting a patch.

Did usb_pgood_delay help ?

-- 
Best regards,
Marek Vasut

[U-Boot] usb: Fail to get descriptor for USB 2.0 device

[DATACOM - Paulo.Zaneti]

On 24/05/2018 14:57, Marek Vasut wrote:
> On 05/24/2018 06:23 PM, DATACOM - Paulo.Zaneti wrote:
>>
>> On 23/05/2018 20:40, Bin Meng wrote:
>>> Hi,
>>>
>>> On Thu, May 24, 2018 at 4:51 AM, DATACOM - Paulo.Zaneti
>>> <paulo.zaneti@datacom.com.br> wrote:
>>>> On 23/05/2018 15:00, Marek Vasut wrote:
>>>>> On 05/23/2018 07:52 PM, DATACOM - Paulo.Zaneti wrote:
>>>>>> On 23/05/2018 14:43, Marek Vasut wrote:
>>>>>>> On 05/23/2018 07:37 PM, DATACOM - Paulo.Zaneti wrote:
>>>>>>>> On 23/05/2018 14:03, Marek Vasut wrote:
>>>>>>>>> On 05/23/2018 07:00 PM, DATACOM - Paulo.Zaneti wrote:
>>>>>>>>>> Hi,
>>>>>>>>> Hi,
>>>>>>>>>
>>>>>>>>>> When trying to migrate a board from u-boot version 2016.09 to
>>>>>>>>>> version
>>>>>>>>>> 2018.03, I found a problem with a USB 2.0 device which used to
>>>>>>>>>> work
>>>>>>>>>> on
>>>>>>>>>> version 2016.09.
>>>>>>>>> Does it still happen in u-boot/master ?
>>>>>>>> Yes, it still happens.
>>>>>>>>
>>>>>>>> I just tested it with the following commit:
>>>>>>>> dca268a .travis.yml: Further optimizations
>>>>>>>>>> In u-boot version 2016.09 the device appears like this:
>>>>>>>>>>
>>>>>>>>>> 2: Mass Storage,  USB Revision 2.0
>>>>>>>>>>       - SanDisk Cruzer Blade 200443243002FB509E64
>>>>>>> Let me guess, is this a DWC2-based host ? You didn't mention which
>>>>>>> SoC
>>>>>>> or USB controller it is.
>>>>>>>
>>>>>>> Cfr https://lists.denx.de/pipermail/u-boot/2016-January/240090.html ,
>>>>>>> DWC2 has problems with those sandisk sticks.
>>>>>> No, it is a NXP T1024 SoC.
>>>>>> Do you think it may be a problem with the SoC or NXP USB host driver ?
>>>>>>
>>>>> So that's chipidea ? That one should be reasonably sane.
>>>> I don't think so. It uses following drivers:
>>>>     drivers/usb/host/ehci-fsl.c
>>>>     drivers/usb/host/ehci-hcd.c
>>>>
>>>>> Submit the patch you had in mind and let's see what happens.
>>>> I just noticed that this stick needs more time after the
>>>> usb_set_address()
>>>> call.
>>>> I increased the mdelay(10) to mdelay(20) and the "usb start" command
>>>> worked.
>>>> But the problem is that I am still not convinced that this should be the
>>>> solution.
>>>>
>>> Agreed. Can you bisect to see which commit broke your stick?
>> Yes. The commit which broke my stick is:
>>
>> commit c008faa77358bb5b313696dd1d5bb8afa03a6ca2
>> Author: Bin Meng <bmeng.cn@gmail.com>
>> Date:   Mon Sep 18 06:40:42 2017 -0700
>>
>>      usb: Only get 64 bytes device descriptor for full speed devices
>>
>>
>> My first guess was that this commit should be adapted to
>> "get_descriptor_len()" for USB_SPEED_HIGH too.
>>
>> But then, I realized that I can bypass this problem by increasing the
>> mdelay() after usb_set_address() from 10 to 20 msec.
>>
>> So, I think commit c008faa77358bb5b313696dd1d5bb8afa03a6ca2 is not the
>> offender one. It probably uncovered another problem with this stick.
> That particular lineup of sandisk sticks is trash, I have a few of those
> here for testing too.
>
>> I will try to get a better understanding before submitting a patch.
> Did usb_pgood_delay help ?
Yes. It worked. Thanks for the tip.
>