[U-Boot] [PATCH 2/3] common: dfu: ignore reset for spl-dfu

[U-Boot] [PATCH 2/3] common: dfu: ignore reset for spl-dfu

[B, Ravi]

Lukasz

>> diff --git a/common/dfu.c b/common/dfu.c index 0e9f5f5..fa77526 100644
>> --- a/common/dfu.c
>> +++ b/common/dfu.c
>> @@ -87,6 +87,9 @@ exit:
>>  	g_dnl_unregister();
>>  	board_usb_cleanup(usbctrl_index, USB_INIT_DEVICE);
>>  
>> +#ifdef CONFIG_SPL_BUILD
>> +	dfu_reset = 0;
>> +#endif

>Why do you only ifdef this part? What problem does this solve?

Common/dfu.c is common code for SPL and U-boot, for SPL-DFU dfu_reset should not be given. This is must fix.
Also this avoid use of run_command for SPL-DFU altogether, SPL size also will reduce by removing cli.c/cli_hush.c

Regards
Ravi

[U-Boot] [PATCH 2/3] common: dfu: ignore reset for spl-dfu

[Lukasz Majewski]

On Thu, 27 Apr 2017 08:26:57 +0000
"B, Ravi" <ravibabu@ti.com> wrote:

> Lukasz
> 
> >> diff --git a/common/dfu.c b/common/dfu.c index 0e9f5f5..fa77526
> >> 100644 --- a/common/dfu.c
> >> +++ b/common/dfu.c
> >> @@ -87,6 +87,9 @@ exit:
> >>  	g_dnl_unregister();
> >>  	board_usb_cleanup(usbctrl_index, USB_INIT_DEVICE);
> >>  
> >> +#ifdef CONFIG_SPL_BUILD
> >> +	dfu_reset = 0;
> >> +#endif
> 
> >Why do you only ifdef this part? What problem does this solve?
> 
> Common/dfu.c is common code for SPL and U-boot, for SPL-DFU dfu_reset
> should not be given. This is must fix. Also this avoid use of
> run_command for SPL-DFU altogether, SPL size also will reduce by
> removing cli.c/cli_hush.c

As I've metioned in the other mail. Kconfig option would be OK.

Please look into the dfu_usb_get_reset() __weak function definition.

It is by default set to true.

You can extend this function to take into account a Kconfig option to
return false during SPL builds.

> 
> Regards
> Ravi




Best regards,

Lukasz Majewski

--

DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de

[U-Boot] [PATCH 2/3] common: dfu: ignore reset for spl-dfu

[Lukasz Majewski]

Hi,

> On Thu, 27 Apr 2017 08:26:57 +0000
> "B, Ravi" <ravibabu@ti.com> wrote:
> 
> > Lukasz
> > 
> > >> diff --git a/common/dfu.c b/common/dfu.c index 0e9f5f5..fa77526
> > >> 100644 --- a/common/dfu.c
> > >> +++ b/common/dfu.c
> > >> @@ -87,6 +87,9 @@ exit:
> > >>  	g_dnl_unregister();
> > >>  	board_usb_cleanup(usbctrl_index, USB_INIT_DEVICE);
> > >>  
> > >> +#ifdef CONFIG_SPL_BUILD
> > >> +	dfu_reset = 0;
> > >> +#endif
> > 
> > >Why do you only ifdef this part? What problem does this solve?
> > 
> > Common/dfu.c is common code for SPL and U-boot, for SPL-DFU
> > dfu_reset should not be given. This is must fix. Also this avoid
> > use of run_command for SPL-DFU altogether, SPL size also will
> > reduce by removing cli.c/cli_hush.c
> 
> As I've metioned in the other mail. Kconfig option would be OK.

And this Kconfig should be _only_ enabled for your SPL-DFU support
enabled (also in Kconfig).

> 
> Please look into the dfu_usb_get_reset() __weak function definition.
> 
> It is by default set to true.
> 
> You can extend this function to take into account a Kconfig option to
> return false during SPL builds.
> 
> > 
> > Regards
> > Ravi
> 
> 
> 
> 
> Best regards,
> 
> Lukasz Majewski
> 
> --
> 
> DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
> HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
> Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de



Best regards,

Lukasz Majewski

--

DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de

[U-Boot] [PATCH 2/3] common: dfu: ignore reset for spl-dfu

[B, Ravi]

Hi Lukasz
  
>> > >> +#ifdef CONFIG_SPL_BUILD
>> > >> +	dfu_reset = 0;
>> > >> +#endif
>> > 
>> > >Why do you only ifdef this part? What problem does this solve?
>> > 
>> > Common/dfu.c is common code for SPL and U-boot, for SPL-DFU 
>> > dfu_reset should not be given. This is must fix. Also this avoid use 
>> > of run_command for SPL-DFU altogether, SPL size also will reduce by 
>> > removing cli.c/cli_hush.c
>> 
>> As I've metioned in the other mail. Kconfig option would be OK.

> And this Kconfig should be _only_ enabled for your SPL-DFU support enabled (also in Kconfig).

I have already added CONFIG_SPL_DFU_NO_RESET option for SPL-DFU in Kconfig.

>> 
>> Please look into the dfu_usb_get_reset() __weak function definition.
>> 
>> It is by default set to true.
>> 
>> You can extend this function to take into account a Kconfig option to 
>> return false during SPL builds. 
>>

As suggested by you, I feel this is best option. 

I have test verified this option, will post in next patch version.

__weak bool dfu_usb_get_reset(void)
{
+#ifdef CONFIG_SPL_DFU_NO_RESET
+	return false
+#else
	return true;
+#endif
}

Also changing run_command() to do_reset().

If (dfu_reset)
	do_reset(NULL, 0, 0, NULL);
 
Regards
Ravi 

[U-Boot] [PATCH 2/3] common: dfu: ignore reset for spl-dfu

[Lukasz Majewski]

Hi Ravi,

> Hi Lukasz
>   
> >> > >> +#ifdef CONFIG_SPL_BUILD
> >> > >> +	dfu_reset = 0;
> >> > >> +#endif
> >> > 
> >> > >Why do you only ifdef this part? What problem does this solve?
> >> > 
> >> > Common/dfu.c is common code for SPL and U-boot, for SPL-DFU 
> >> > dfu_reset should not be given. This is must fix. Also this avoid
> >> > use of run_command for SPL-DFU altogether, SPL size also will
> >> > reduce by removing cli.c/cli_hush.c
> >> 
> >> As I've metioned in the other mail. Kconfig option would be OK.
> 
> > And this Kconfig should be _only_ enabled for your SPL-DFU support
> > enabled (also in Kconfig).
> 
> I have already added CONFIG_SPL_DFU_NO_RESET option for SPL-DFU in
> Kconfig.
> 
> >> 
> >> Please look into the dfu_usb_get_reset() __weak function
> >> definition.
> >> 
> >> It is by default set to true.
> >> 
> >> You can extend this function to take into account a Kconfig option
> >> to return false during SPL builds. 
> >>
> 
> As suggested by you, I feel this is best option. 
> 
> I have test verified this option, will post in next patch version.
> 
> __weak bool dfu_usb_get_reset(void)
> {
> +#ifdef CONFIG_SPL_DFU_NO_RESET
> +	return false
> +#else
> 	return true;
> +#endif
> }
> 
> Also changing run_command() to do_reset().
> 
> If (dfu_reset)
> 	do_reset(NULL, 0, 0, NULL);

+1

One question - could you write some numbers before SPL dfu tinification
and afterwards?

I'm just curious how much we can save up.

>  
> Regards
> Ravi 
> 




Best regards,

Lukasz Majewski

--

DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de

[U-Boot] [PATCH 2/3] common: dfu: ignore reset for spl-dfu

[B, Ravi]

Hi Lukasz,


>> 
>> Also changing run_command() to do_reset().
>> 
>> If (dfu_reset)
>> 	do_reset(NULL, 0, 0, NULL);

>+1

>One question - could you write some numbers before SPL dfu tinification and afterwards?

>I'm just curious how much we can save up.

I am OOO till May 2nd. Will provide more details once I am back.

Regards
Ravi

[U-Boot] [PATCH 3/3] spl: dfu: reduce spl-dfu MLO size

[B, Ravi]

{Corrected typo u-boot mailing list.}

Hi Lukasz

>> Since spl-dfu does not dfu-reset, there is no need of 
>> run_command_cli, hence compiling out cli.c and cli_hush.c to reduce 
>> the spl-dfu memory foot print.
>> 
[..]
>>   */
>> -#ifdef CONFIG_DFU_TFTP
>> +#if defined(CONFIG_DFU_TFTP) && !defined(CONFIG_SPL_BUILD)

>And then somebody would like to use DFU TFTP in the SPL (like you use 
>DFU) and we would have new set of problems.

>Sorry, but this is a wrong approach. 

I agree with you for TFTP use-case. 
But as aligned, in order to reduce SPL size, use SPL-DFU to load and execute u-boot from RAM.
And then use complete DFU facility in u-boot for flashing MMC/SF/NAND etc.

I don't see any harm to allow for DFU_TFTP in SPL. 
And SPL shall not support CONFIG_DFU_{MMC/NAND/SF} or any memory device except DFU_RAM.

Regards
Ravi

[U-Boot] [PATCH 0/3] spl: dfu: misc fixes and reduce MLO foot print

[Ravi Babu]

The patch series spl-dfu fixes includes
	- select spl-dfu only spl-ram supported
	- ignore the dfu-reset for spl-dfu
	- reduce the spl-dfu MLO foot print

buildman ran for arm targets

Ravi Babu (3):
  spl: Kconfig: dfu: spl-dfu depends on SPL_RAM_SUPPORT
  common: dfu: ignore reset for spl-dfu
  spl: dfu: reduce spl-dfu MLO size

 common/Makefile      | 3 +--
 common/dfu.c         | 3 +++
 common/spl/Kconfig   | 1 +
 drivers/dfu/Makefile | 4 +++-
 include/dfu.h        | 8 ++++----
 5 files changed, 12 insertions(+), 7 deletions(-)

-- 
1.9.1

[U-Boot] [PATCH 2/3] common: dfu: ignore reset for spl-dfu

[Ravi Babu]

The SPL-DFU feature enable to load and
execute u-boot over usb from PC using
dfu-util.
Hence dfu-reset should not be issued
when dfu-util -R switch is issued.

Signed-off-by: Ravi Babu <ravibabu@ti.com>
---
 common/dfu.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/common/dfu.c b/common/dfu.c
index 0e9f5f5..fa77526 100644
--- a/common/dfu.c
+++ b/common/dfu.c
@@ -87,6 +87,9 @@ exit:
 	g_dnl_unregister();
 	board_usb_cleanup(usbctrl_index, USB_INIT_DEVICE);
 
+#ifdef CONFIG_SPL_BUILD
+	dfu_reset = 0;
+#endif
 	if (dfu_reset)
 		run_command("reset", 0);
 
-- 
1.9.1

[U-Boot] [PATCH 2/3] common: dfu: ignore reset for spl-dfu

[Tom Rini]

On Wed, Apr 26, 2017 at 06:44:08PM +0530, Ravi Babu wrote:

> The SPL-DFU feature enable to load and
> execute u-boot over usb from PC using
> dfu-util.
> Hence dfu-reset should not be issued
> when dfu-util -R switch is issued.
> 
> Signed-off-by: Ravi Babu <ravibabu@ti.com>
> ---
>  common/dfu.c | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/common/dfu.c b/common/dfu.c
> index 0e9f5f5..fa77526 100644
> --- a/common/dfu.c
> +++ b/common/dfu.c
> @@ -87,6 +87,9 @@ exit:
>  	g_dnl_unregister();
>  	board_usb_cleanup(usbctrl_index, USB_INIT_DEVICE);
>  
> +#ifdef CONFIG_SPL_BUILD
> +	dfu_reset = 0;
> +#endif
>  	if (dfu_reset)
>  		run_command("reset", 0);

So we "fix" some of the problems we see by saying that you can't reset
the board in SPL via DFU.  I think maybe we should instead drop
run_command here and make reset-via-DFU call do_reset() directly like
some other small-size-required cases do.  This will let us drop the
command requirement here but still allow for "use DFU to flash and reset
the board with just SPL" as a use-case.  Thanks!

-- 
Tom
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[U-Boot] [PATCH 2/3] common: dfu: ignore reset for spl-dfu

[B, Ravi]

Hi Tom

>> The SPL-DFU feature enable to load and execute u-boot over usb from PC 
>> using dfu-util.
>> Hence dfu-reset should not be issued
>> when dfu-util -R switch is issued.
>> 
>> Signed-off-by: Ravi Babu <ravibabu@ti.com>
>> ---
>>  common/dfu.c | 3 +++
>>  1 file changed, 3 insertions(+)
>> 
>> diff --git a/common/dfu.c b/common/dfu.c index 0e9f5f5..fa77526 100644
>> --- a/common/dfu.c
>> +++ b/common/dfu.c
>> @@ -87,6 +87,9 @@ exit:
>>  	g_dnl_unregister();
>>  	board_usb_cleanup(usbctrl_index, USB_INIT_DEVICE);
>>  
>> +#ifdef CONFIG_SPL_BUILD
>> +	dfu_reset = 0;
>> +#endif
>>  	if (dfu_reset)
>>  		run_command("reset", 0);

>So we "fix" some of the problems we see by saying that you can't reset the board in SPL via DFU. 
> I think maybe we should instead drop run_command here and make reset-via-DFU call do_reset() directly like some other small-size-required cases do.  This will let us drop the command >requirement here but still allow for "use DFU to flash and reset the board with just SPL" as a use-case.  Thanks!

The SPL-DFU will load and execute u-boot.img from RAM.  If we issue dfu-reset (-R switch), this leads to cpu-reset and we lost the purpose of SPL-DFU itself.
Hence dfu-reset issue shall not be issued for SPL-DFU. 

I agree, the dfu-reset is needed in u-boot, after flashing images to QSPI/eMMC/SD using the DFU to execute newly loaded image.
So, dfu-reset is needed for u-boot, but not required for SPL-DFU.

For u-boot, we can continue to use run_command() for dfu-reset.

Regards
Ravi

[U-Boot] [PATCH 2/3] common: dfu: ignore reset for spl-dfu

[Tom Rini]

On Wed, Apr 26, 2017 at 03:58:27PM +0000, B, Ravi wrote:
> Hi Tom
> 
> >> The SPL-DFU feature enable to load and execute u-boot over usb from PC 
> >> using dfu-util.
> >> Hence dfu-reset should not be issued
> >> when dfu-util -R switch is issued.
> >> 
> >> Signed-off-by: Ravi Babu <ravibabu@ti.com>
> >> ---
> >>  common/dfu.c | 3 +++
> >>  1 file changed, 3 insertions(+)
> >> 
> >> diff --git a/common/dfu.c b/common/dfu.c index 0e9f5f5..fa77526 100644
> >> --- a/common/dfu.c
> >> +++ b/common/dfu.c
> >> @@ -87,6 +87,9 @@ exit:
> >>  	g_dnl_unregister();
> >>  	board_usb_cleanup(usbctrl_index, USB_INIT_DEVICE);
> >>  
> >> +#ifdef CONFIG_SPL_BUILD
> >> +	dfu_reset = 0;
> >> +#endif
> >>  	if (dfu_reset)
> >>  		run_command("reset", 0);
> 
> >So we "fix" some of the problems we see by saying that you can't
> >reset the board in SPL via DFU.  I think maybe we should instead drop
> >run_command here and make reset-via-DFU call do_reset() directly like
> >some other small-size-required cases do.  This will let us drop the
> >command >requirement here but still allow for "use DFU to flash and
> >reset the board with just SPL" as a use-case.  Thanks!
> 
> The SPL-DFU will load and execute u-boot.img from RAM.  If we issue
> dfu-reset (-R switch), this leads to cpu-reset and we lost the purpose
> of SPL-DFU itself.  Hence dfu-reset issue shall not be issued for
> SPL-DFU. 
> 
> I agree, the dfu-reset is needed in u-boot, after flashing images to
> QSPI/eMMC/SD using the DFU to execute newly loaded image.  So,
> dfu-reset is needed for u-boot, but not required for SPL-DFU.
> 
> For u-boot, we can continue to use run_command() for dfu-reset.

OK.  I guess if someone else wants to try and use SPL for DFU flashing
that requires more work and they can address the above then, thanks!

Reviewed-by: Tom Rini <trini@konsulko.com>

-- 
Tom
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[U-Boot] [PATCH 2/3] common: dfu: ignore reset for spl-dfu

[B, Ravi]

Hi Tom

>> 
>> The SPL-DFU will load and execute u-boot.img from RAM.  If we issue 
>> dfu-reset (-R switch), this leads to cpu-reset and we lost the purpose 
>> of SPL-DFU itself.  Hence dfu-reset issue shall not be issued for 
>> SPL-DFU.
>> 
>> I agree, the dfu-reset is needed in u-boot, after flashing images to 
>> QSPI/eMMC/SD using the DFU to execute newly loaded image.  So, 
>> dfu-reset is needed for u-boot, but not required for SPL-DFU.
>> 
>> For u-boot, we can continue to use run_command() for dfu-reset.

>OK.  I guess if someone else wants to try and use SPL for DFU flashing that requires more work and they can address the above then, thanks!

>Reviewed-by: Tom Rini <trini@konsulko.com>

Thanks.

Any comments on [PATCH 3/3]?

Regards
Ravi

[U-Boot] [PATCH 2/3] common: dfu: ignore reset for spl-dfu

[Lukasz Majewski]

On Wed, 26 Apr 2017 12:24:06 -0400
Tom Rini <trini@konsulko.com> wrote:

> On Wed, Apr 26, 2017 at 03:58:27PM +0000, B, Ravi wrote:
> > Hi Tom
> > 
> > >> The SPL-DFU feature enable to load and execute u-boot over usb
> > >> from PC using dfu-util.
> > >> Hence dfu-reset should not be issued
> > >> when dfu-util -R switch is issued.
> > >> 
> > >> Signed-off-by: Ravi Babu <ravibabu@ti.com>
> > >> ---
> > >>  common/dfu.c | 3 +++
> > >>  1 file changed, 3 insertions(+)
> > >> 
> > >> diff --git a/common/dfu.c b/common/dfu.c index 0e9f5f5..fa77526
> > >> 100644 --- a/common/dfu.c
> > >> +++ b/common/dfu.c
> > >> @@ -87,6 +87,9 @@ exit:
> > >>  	g_dnl_unregister();
> > >>  	board_usb_cleanup(usbctrl_index, USB_INIT_DEVICE);
> > >>  
> > >> +#ifdef CONFIG_SPL_BUILD
> > >> +	dfu_reset = 0;
> > >> +#endif
> > >>  	if (dfu_reset)
> > >>  		run_command("reset", 0);
> > 
> > >So we "fix" some of the problems we see by saying that you can't
> > >reset the board in SPL via DFU.  I think maybe we should instead
> > >drop run_command here and make reset-via-DFU call do_reset()
> > >directly like some other small-size-required cases do.  This will
> > >let us drop the command >requirement here but still allow for "use
> > >DFU to flash and reset the board with just SPL" as a use-case.
> > >Thanks!
> > 
> > The SPL-DFU will load and execute u-boot.img from RAM.  If we issue
> > dfu-reset (-R switch), this leads to cpu-reset and we lost the
> > purpose of SPL-DFU itself.  Hence dfu-reset issue shall not be
> > issued for SPL-DFU. 

It seems like a valid use case - maybe it would be beneficial to add
Kconfig option (CONFIG_DFU_SPL_NO_RESET) to give the user possibility
to decide (and in this way document it?).

> > 
> > I agree, the dfu-reset is needed in u-boot, after flashing images to
> > QSPI/eMMC/SD using the DFU to execute newly loaded image.  So,
> > dfu-reset is needed for u-boot, but not required for SPL-DFU.
> > 
> > For u-boot, we can continue to use run_command() for dfu-reset.
> 
> OK.  I guess if someone else wants to try and use SPL for DFU flashing
> that requires more work and they can address the above then, thanks!
> 
> Reviewed-by: Tom Rini <trini@konsulko.com>
> 




Best regards,

Lukasz Majewski

--

DENX Software Engineering GmbH,      Managing Director: Wolfgang Denk
HRB 165235 Munich, Office: Kirchenstr.5, D-82194 Groebenzell, Germany
Phone: (+49)-8142-66989-10 Fax: (+49)-8142-66989-80 Email: wd at denx.de
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[U-Boot] [PATCH 2/3] common: dfu: ignore reset for spl-dfu

[B, Ravi]

Lukasz

>> > 
>> > The SPL-DFU will load and execute u-boot.img from RAM.  If we issue 
>> > dfu-reset (-R switch), this leads to cpu-reset and we lost the 
>> > purpose of SPL-DFU itself.  Hence dfu-reset issue shall not be 
>> > issued for SPL-DFU.

>It seems like a valid use case - maybe it would be beneficial to add Kconfig option (CONFIG_DFU_SPL_NO_RESET) to give the user possibility to decide (and in this way document it?).

Yes, make sense, to differentiate dfu-reset for SPL-DFU. 
Ok, I will include CONFIG_SPL_DFU_NO_RESET  in next version of patch.

Thanks.

>> > 
>> > I agree, the dfu-reset is needed in u-boot, after flashing images to 
>> > QSPI/eMMC/SD using the DFU to execute newly loaded image.  So, 
>> > dfu-reset is needed for u-boot, but not required for SPL-DFU.
>> > 
>> > For u-boot, we can continue to use run_command() for dfu-reset.
>> 
>> OK.  I guess if someone else wants to try and use SPL for DFU flashing 
>> that requires more work and they can address the above then, thanks!
>> 
>> Reviewed-by: Tom Rini <trini@konsulko.com>


Regards
Ravi 

[U-Boot] [PATCH 2/3] common: dfu: ignore reset for spl-dfu

[B, Ravi]

Lukasz

>> > 
>> > The SPL-DFU will load and execute u-boot.img from RAM.  If we issue 
>> > dfu-reset (-R switch), this leads to cpu-reset and we lost the 
>> > purpose of SPL-DFU itself.  Hence dfu-reset issue shall not be 
>> > issued for SPL-DFU.

>It seems like a valid use case - maybe it would be beneficial to add Kconfig option (CONFIG_DFU_SPL_NO_RESET) to give the user possibility to decide (and in this way document it?).

Yes, make sense, to differentiate dfu-reset for SPL-DFU. 
Ok, I will include CONFIG_SPL_DFU_NO_RESET  in next version of patch.

Thanks.

>> > 
>> > I agree, the dfu-reset is needed in u-boot, after flashing images 
>> > to QSPI/eMMC/SD using the DFU to execute newly loaded image.  So, 
>> > dfu-reset is needed for u-boot, but not required for SPL-DFU.
>> > 
>> > For u-boot, we can continue to use run_command() for dfu-reset.
>> 
>> OK.  I guess if someone else wants to try and use SPL for DFU 
>> flashing that requires more work and they can address the above then, thanks!
>> 
>> Reviewed-by: Tom Rini <trini@konsulko.com>


Regards
Ravi