[U-Boot-Users] usb problem

[U-Boot-Users] usb problem

[kow9loon]

Hi,

We have problems reading/writing from/to a USB NAND flash having a capacity
of 512 MB. What we dicovered was: up to a capacity of 128 MB, the operations
looked 'koche', thereafter, the system hanged. Our hardware setup are as
follows: (1) a MPC8544E CPU; (2) a ISP 1564 PCI-USB 2.0 Host Controller; (3)
a ST72681 Flash Driver Controller; and (4) a 512 MB Nand flash. 

We also understand that support of the OHCI driver in U-boot is only limited
to support of "Mass Storage Device" class device, and rapid reading and
writing could post a potential problem. We deliberately slow down the
read/write traffic in an attempt to give some breathing rooms to the the
driver (and possibly to the controller). Unfortunately, our endeavors, thus
far, have only limited success. We would appreciate any comments that could
help us to dig our way out of this hole. Thank you.

 Regards,

Kow9loon
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[U-Boot-Users] usb problem

[Markus Klotzbücher]

kow9loon <easter8@hotmail.com> writes:

> We have problems reading/writing from/to a USB NAND flash having a capacity
> of 512 MB. What we dicovered was: up to a capacity of 128 MB, the operations
> looked 'koche', thereafter, the system hanged. Our hardware setup are
> as

Where does it hang?

> follows: (1) a MPC8544E CPU; (2) a ISP 1564 PCI-USB 2.0 Host Controller; (3)
> a ST72681 Flash Driver Controller; and (4) a 512 MB Nand flash. 
>
> We also understand that support of the OHCI driver in U-boot is only limited
> to support of "Mass Storage Device" class device, and rapid reading and
> writing could post a potential problem. We deliberately slow down the
> read/write traffic in an attempt to give some breathing rooms to the
> the

Some so called "crappy" USB sticks are known to have some timing
problems and require additional delays, but so far no real fix has been
found. Search the archives for Rodolfos "crappy Usbkeys" patch. Does
this fix solve you problem?

Regards

	Markus

--
DENX Software Engineering GmbH, HRB 165235 Munich, CEO: Wolfgang Denk
Office:  Kirchenstr. 5,       D-82194 Groebenzell,            Germany

[U-Boot-Users] usb problem

[kow9loon]

Hi Markus,

At this point, we have not yet identified the location of the driver where
it gets hung. Just everything got frozen once the 128 MB mark  was reached.
By the way, where could I get hold of the patch from Rodolfos? I did a
serach and followed the link provided by Rodolfos, but the link when
NOWHERE. Did Rodolfos submitted his patches to be incorporated to the U-boot
trunk? If he did, where could I get hold of his patches such that I could
better understand it and try it out? Thank you in advance for your help. 

Regards,

Kow9loon


Markus Klotzb?cher-2 wrote:
> 
> 
> kow9loon <easter8@hotmail.com> writes:
> 
>> We have problems reading/writing from/to a USB NAND flash having a
>> capacity
>> of 512 MB. What we dicovered was: up to a capacity of 128 MB, the
>> operations
>> looked 'koche', thereafter, the system hanged. Our hardware setup are
>> as
> 
> Where does it hang?
> 
>> follows: (1) a MPC8544E CPU; (2) a ISP 1564 PCI-USB 2.0 Host Controller;
>> (3)
>> a ST72681 Flash Driver Controller; and (4) a 512 MB Nand flash. 
>>
>> We also understand that support of the OHCI driver in U-boot is only
>> limited
>> to support of "Mass Storage Device" class device, and rapid reading and
>> writing could post a potential problem. We deliberately slow down the
>> read/write traffic in an attempt to give some breathing rooms to the
>> the
> 
> Some so called "crappy" USB sticks are known to have some timing
> problems and require additional delays, but so far no real fix has been
> found. Search the archives for Rodolfos "crappy Usbkeys" patch. Does
> this fix solve you problem?
> 
> Regards
> 
> 	Markus
> 
> --
> DENX Software Engineering GmbH, HRB 165235 Munich, CEO: Wolfgang Denk
> Office:  Kirchenstr. 5,       D-82194 Groebenzell,            Germany
> 
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> 

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[U-Boot-Users] usb problem

[Rodolfo Giometti]

On Thu, Apr 19, 2007 at 10:28:55AM -0700, kow9loon wrote:
> 
> At this point, we have not yet identified the location of the driver where
> it gets hung. Just everything got frozen once the 128 MB mark  was reached.

My problem was different one. I _never_ got my board frozen due USB
activity.

> By the way, where could I get hold of the patch from Rodolfos? I did a
> serach and followed the link provided by Rodolfos, but the link when
> NOWHERE. Did Rodolfos submitted his patches to be incorporated to the U-boot
> trunk? If he did, where could I get hold of his patches such that I could
> better understand it and try it out? Thank you in advance for your help. 

Here my patches:

commit a8c7af8c768d1ac657286b97952eb1e66b2dd2e0
Author: Rodolfo Giometti <giometti@linux.it>
Date:   Fri Mar 30 16:33:00 2007 +0200

    USB: (Another) delay for crappy USB keys.
    
    Some USB keys are slow in giving back an answer when the Root HUB enables
    power lines.
    
    Signed-off-by: Rodolfo Giometti <giometti@linux.it>

diff --git a/drivers/usb_ohci.c b/drivers/usb_ohci.c
index c5e4c38..f381c40 100644
--- a/drivers/usb_ohci.c
+++ b/drivers/usb_ohci.c
@@ -1178,7 +1178,9 @@ pkt_print(dev, pipe, buffer, transfer_len, cmd, "SUB(rh)", usb_pipein(pipe));
                                            WR_RH_PORTSTAT (RH_PS_PRS);
                                        OK (0);
                        case (RH_PORT_POWER):
-                                       WR_RH_PORTSTAT (RH_PS_PPS ); OK (0);
+                                       WR_RH_PORTSTAT (RH_PS_PPS );
+                                       wait_ms(100);
+                                       OK (0);
                        case (RH_PORT_ENABLE): /* BUG IN HUP CODE *********/
                                        if (RD_RH_PORTSTAT & RH_PS_CCS)
                                            WR_RH_PORTSTAT (RH_PS_PES );

---

commit 22bd6ed0e4b31a0d1060436893d7d03c6eb203fc
Author: Rodolfo Giometti <giometti@linux.it>
Date:   Tue Mar 6 11:32:04 2007 +0100

    USB: Delay for crappy USB keys.
    
    Signed-off-by: Rodolfo Giometti <giometti@linux.it>

diff --git a/common/usb.c b/common/usb.c
index 0857494..087a65f 100644
--- a/common/usb.c
+++ b/common/usb.c
@@ -61,7 +61,7 @@
 #ifdef USB_DEBUG
 #define        USB_PRINTF(fmt,args...) printf (fmt ,##args)
 #else
-#define USB_PRINTF(fmt,args...)
+#define USB_PRINTF(fmt,args...)        wait_ms(1) /* for crappy USB keys... */
 #endif
 
 #define USB_BUFSIZ     512

---

Ciao,

Rodolfo

-- 

GNU/Linux Solutions                  e-mail:    giometti at enneenne.com
Linux Device Driver                             giometti at gnudd.com
Embedded Systems                     		giometti at linux.it
UNIX programming                     phone:     +39 349 2432127

[U-Boot-Users] usb problem

[Wolfgang Denk]

In message <20070420134935.GB4619@enneenne.com> you wrote:
>
> Here my patches:

Thanks a lot.

Markus, I guess you will take care of that?

> diff --git a/common/usb.c b/common/usb.c
> index 0857494..087a65f 100644
> --- a/common/usb.c
> +++ b/common/usb.c
> @@ -61,7 +61,7 @@
>  #ifdef USB_DEBUG
>  #define        USB_PRINTF(fmt,args...) printf (fmt ,##args)
>  #else
> -#define USB_PRINTF(fmt,args...)
> +#define USB_PRINTF(fmt,args...)        wait_ms(1) /* for crappy USB keys... */
>  #endif

Arghhh. But this one is definitely not ripe for mainstream yet.

Please clean this up.

Best regards,

Wolfgang Denk

-- 
DENX Software Engineering GmbH, HRB 165235 Munich, CEO: Wolfgang Denk
Office:  Kirchenstr. 5,       D-82194 Groebenzell,            Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
I haven't lost my mind -- it's backed up on tape somewhere.

[U-Boot-Users] usb problem

[Rodolfo Giometti]

On Fri, Apr 20, 2007 at 03:56:01PM +0200, Wolfgang Denk wrote:

> > diff --git a/common/usb.c b/common/usb.c
> > index 0857494..087a65f 100644
> > --- a/common/usb.c
> > +++ b/common/usb.c
> > @@ -61,7 +61,7 @@
> >  #ifdef USB_DEBUG
> >  #define        USB_PRINTF(fmt,args...) printf (fmt ,##args)
> >  #else
> > -#define USB_PRINTF(fmt,args...)
> > +#define USB_PRINTF(fmt,args...)        wait_ms(1) /* for crappy USB keys... */
> >  #endif
> 
> Arghhh. But this one is definitely not ripe for mainstream yet.

Eheheheh, you already told me about this dirty trick! :P

> Please clean this up.

I see, but currently I'm very busy for that! Please keep this ?work
around? in some TODO list until I (or someone else) can find some time
to definitely resolve it.

Ciao,

Rodolfo

-- 

GNU/Linux Solutions                  e-mail:    giometti at enneenne.com
Linux Device Driver                             giometti at gnudd.com
Embedded Systems                     		giometti at linux.it
UNIX programming                     phone:     +39 349 2432127

[U-Boot-Users] usb problem

[Markus Klotzbücher]

Hi Rodolfo,

Rodolfo Giometti <giometti@enneenne.com> writes:

> On Fri, Apr 20, 2007 at 03:56:01PM +0200, Wolfgang Denk wrote:

>> Please clean this up.
>
> I see, but currently I'm very busy for that! Please keep this ?work
> around? in some TODO list until I (or someone else) can find some time
> to definitely resolve it.

Yes, I understood these patches as work in progress. I can apply your
first patch if you want, but does it make sense without the second?

Regards

Markus Klotzbuecher

--
DENX Software Engineering GmbH, HRB 165235 Munich, CEO: Wolfgang Denk
Office:  Kirchenstr. 5,       D-82194 Groebenzell,            Germany

[U-Boot-Users] usb problem

[Rodolfo Giometti]

On Mon, Apr 23, 2007 at 08:48:38AM +0200, Markus Klotzb?cher wrote:
> 
> Yes, I understood these patches as work in progress. I can apply your
> first patch if you want, but does it make sense without the second?

Yes, since they resolve two different problems. It could happen that a
key is recognized by the USB host as USB device but not as mass
storage and it could happen that a key is not recognized as USB device
at all.

Ciao,

Rodolfo

-- 

GNU/Linux Solutions                  e-mail:    giometti at enneenne.com
Linux Device Driver                             giometti at gnudd.com
Embedded Systems                     		giometti at linux.it
UNIX programming                     phone:     +39 349 2432127

[U-Boot-Users] usb problem

[Markus Klotzbücher]

Hi Rodolfo,

Rodolfo Giometti <giometti@enneenne.com> writes:

> On Thu, Apr 19, 2007 at 10:28:55AM -0700, kow9loon wrote:
>> 
>> At this point, we have not yet identified the location of the driver where
>> it gets hung. Just everything got frozen once the 128 MB mark  was reached.
>
> My problem was different one. I _never_ got my board frozen due USB
> activity.

Yes, I know. But I figured it could be worth trying nevertheless.

Regards

Markus Klotzbuecher

--
DENX Software Engineering GmbH, HRB 165235 Munich, CEO: Wolfgang Denk
Office:  Kirchenstr. 5,       D-82194 Groebenzell,            Germany

[U-Boot-Users] usb problem

[Rodolfo Giometti]

On Mon, Apr 23, 2007 at 08:45:30AM +0200, Markus Klotzb?cher wrote:
> 
> Yes, I know. But I figured it could be worth trying nevertheless.

I see and I agree with you.

Ciao,

Rodolfo

-- 

GNU/Linux Solutions                  e-mail:    giometti at enneenne.com
Linux Device Driver                             giometti at gnudd.com
Embedded Systems                     		giometti at linux.it
UNIX programming                     phone:     +39 349 2432127

[U-Boot-Users] usb problem

[Markus Klotzbücher]

Rodolfo Giometti <giometti@enneenne.com> writes:

> Here my patches:
>
> commit a8c7af8c768d1ac657286b97952eb1e66b2dd2e0
> Author: Rodolfo Giometti <giometti@linux.it>
> Date:   Fri Mar 30 16:33:00 2007 +0200
>
>     USB: (Another) delay for crappy USB keys.
>     
>     Some USB keys are slow in giving back an answer when the Root HUB enables
>     power lines.
>     
>     Signed-off-by: Rodolfo Giometti <giometti@linux.it>

Applied to custodian USB tree, thanks!

Regards

Markus Klotzbuecher

--
DENX Software Engineering GmbH, HRB 165235 Munich, CEO: Wolfgang Denk
Office:  Kirchenstr. 5,       D-82194 Groebenzell,            Germany