Barebox on a 3730
Hi,
We have successfully used Barebox as bootloader on one of our own boards with an OMAP 3530. Same board, but with a 3730 instead (and a few auxiliary components changed) I'm getting completely garbled output on the serial port. I tried changing the baud rate from 115200 to 38400 and 19200 to no avail.
Anyone here rambooted a 3730 with barebox? (Just to rule out that I need to do any software changes.)
When setting the board in boot mode "60" is printed on the serial port by the boot ROM, the same way "40W" was printed by the 3530 so it's not like the serial port isn't working at all. I can bootstrap via either USB or serial port. We're using the omap3530_beagle_per_uart_defconfig.
Thanks,
Orjan
Signature · 7 lines
Orjan Friberg FlatFrog Laboratories AB _______________________________________________ barebox mailing list [email protected] http://lists.infradead.org/mailman/listinfo/barebox
Quoted 2 lines · Orjan Friberg
Anyone here rambooted a 3730 with barebox? (Just to rule out that I need to do any software changes.)
I do have an BeagleBoard xM but it seems the user button doesn't affect the boot sequence like it did on the original BeagleBoard, so I don't have any other hardware to try this on.
Quoted 1 line
When setting the board in boot mode "60" is printed on the serial port
... with "60" being "\x36\x30" in printable characters. I did a hexdump of the garbled output and its basically a lot of 0xc0 with 0x00 sprinkled in between.
I'd appreciate any clue as to what's happening.
Thanks,
Orjan
Signature · 7 lines
Orjan Friberg FlatFrog Laboratories AB _______________________________________________ barebox mailing list [email protected] http://lists.infradead.org/mailman/listinfo/barebox
Hi,
Quoted 7 lines · Orjan Friberg
Hi,
We have successfully used Barebox as bootloader on one of our own boards with an OMAP 3530. Same board, but with a 3730 instead (and a few auxiliary components changed) I'm getting completely garbled output on the serial port. I tried changing the baud rate from 115200 to 38400 and 19200 to no avail.
Not have omap3530 or other but have same issue with different board type. Problem was with clock setup for serial. Just an idea check if clock is correct according data sheet. Maybe 37xx differs from 35xx ;)
Quoted 13 lines
Anyone here rambooted a 3730 with barebox? (Just to rule out that I need to do any software changes.)
When setting the board in boot mode "60" is printed on the serial port by the boot ROM, the same way "40W" was printed by the 3530 so it's not like the serial port isn't working at all. I can bootstrap via either USB or serial port. We're using the
omap3530_beagle_per_uart_defconfig.Thanks,
Orjan
Quoted 9 lines
--
Orjan Friberg
FlatFrog Laboratories AB_______________________________________________
barebox mailing list
[email protected]
http://lists.infradead.org/mailman/listinfo/barebox
thanks,
marek
Signature · 15 lines
as simple and primitive as possible ------------------------------------------------- Marek Belisko - OPEN-NANDRA Freelance Developer Ruska Nova Ves 219 | Presov, 08005 Slovak Republic Tel: +421 915 052 184 skype: marekwhite icq: 290551086 web: http://open-nandra.com _______________________________________________ barebox mailing list [email protected] http://lists.infradead.org/mailman/listinfo/barebox
Quoted 3 lines · Belisko Marek
Not have omap3530 or other but have same issue with different board type. Problem was with clock setup for serial. Just an idea check if clock is correct according data sheet. Maybe 37xx differs from 35xx ;)
Clocking looks like it should be the same but just out of curiosity, what issue did you have with the clock setup? (What was bad, how did it manifest itself.)
I haven't found any 3530 vs. 3730 diffs in the uart configuration in u-boot or linux (though there is a silicon errata fix in the latest linux-omap-2.6 kernel related to not reading from an empty FIFO).
But then again, they could potentially both be relying on the first stage bootloader setting things upp correctly (and then not touching it).
Thanks,
Orjan
Signature · 7 lines
Orjan Friberg FlatFrog Laboratories AB _______________________________________________ barebox mailing list [email protected] http://lists.infradead.org/mailman/listinfo/barebox
_______________________________________
From: [email protected] [[email protected]] On Behalf Of Belisko Marek [[email protected]]
Sent: Thursday, December 02, 2010 8:43 PM
To: Orjan Friberg
Cc: [email protected]
Subject: Re: Barebox on a 3730
Hi,
Quoted 7 lines · Orjan Friberg
Hi,
We have successfully used Barebox as bootloader on one of our own boards with an OMAP 3530. Same board, but with a 3730 instead (and a few auxiliary components changed) I'm getting completely garbled output on the serial port. I tried changing the baud rate from 115200 to 38400 and 19200 to no avail.
Not have omap3530 or other but have same issue with different board type. Problem was with clock setup for serial. Just an idea check if clock is correct according data sheet. Maybe 37xx differs from 35xx ;)
[sp] Yes. There is a difference between the 35x and 37x clock settings.
Quoted 3 lines
Anyone here rambooted a 3730 with barebox? (Just to rule out that I need to do any software changes.)
[sp] If the support does exist yet - changes are necessary.
[sp] How urgent is your need? I could make a patch - but you may have
to wait for couple of days.
Quoted 5 lines
When setting the board in boot mode "60" is printed on the serial port by the boot ROM, the same way "40W" was printed by the 3530 so it's not like the serial port isn't working at all. I can bootstrap via either USB or serial port. We're using the
omap3530_beagle_per_uart_defconfig.
_______________________________________________
barebox mailing list
[email protected]
http://lists.infradead.org/mailman/listinfo/barebox
Quoted 2 lines · Sanjeev
[sp] How urgent is your need? I could make a patch - but you may have
to wait for couple of days.
Well, that would be great. I'd be happy to help out if I can.
Signature · 7 lines
Orjan Friberg FlatFrog Laboratories AB _______________________________________________ barebox mailing list [email protected] http://lists.infradead.org/mailman/listinfo/barebox
Quoted 16 lines
-----Original Message-----
From: [email protected] [mailto:[email protected]] On Behalf Of Orjan Friberg
Sent: Thursday, December 02, 2010 10:10 PM
To: Belisko Marek
Cc: [email protected]
Subject: Re: Barebox on a 3730Quoted 1 line · Belisko Marek
Not have omap3530 or other but have same issue with
different board type.
Quoted 1 line
Problem was with clock setup for serial. Just an idea check
if clock is correct
Quoted 1 line
according data sheet. Maybe 37xx differs from 35xx ;)
Quoted 9 lines
Clocking looks like it should be the same but just out of curiosity, what issue did you have with the clock setup? (What was bad, how did it
manifest itself.)I haven't found any 3530 vs. 3730 diffs in the uart configuration in u-boot or linux (though there is a silicon errata fix in the latest linux-omap-2.6 kernel related to not reading from an empty FIFO).
Look for the AM37x TRM here:
http://focus.ti.com/docs/prod/folders/print/am3715.html
Quoted 5 lines
But then again, they could potentially both be relying on the first stage bootloader setting things upp correctly (and then not touching it).
Quoted 12 lines
Thanks,
OrjanSignature · 7 lines
Orjan Friberg FlatFrog Laboratories AB _______________________________________________ barebox mailing list [email protected] http://lists.infradead.org/mailman/listinfo/barebox
_______________________________________________
barebox mailing list
[email protected]
http://lists.infradead.org/mailman/listinfo/barebox
Quoted 6 lines · Sanjeev
Quoted 4 lines
I haven't found any 3530 vs. 3730 diffs in the uart configuration in u-boot or linux (though there is a silicon errata fix in the latest linux-omap-2.6 kernel related to not reading from an empty FIFO).
Look for the AM37x TRM here:
http://focus.ti.com/docs/prod/folders/print/am3715.html
Any specific section you were thinking of? I did look in the UART section of the TRM before and established that it was still driven by a 48 MHz clock.
Signature · 7 lines
Orjan Friberg FlatFrog Laboratories AB _______________________________________________ barebox mailing list [email protected] http://lists.infradead.org/mailman/listinfo/barebox
Quoted 6 lines · Orjan Friberg
Quoted 5 lines · Sanjeev
Quoted 5 lines
I haven't found any 3530 vs. 3730 diffs in the uart configuration in u-boot or linux (though there is a silicon errata fix in the latest linux-omap-2.6 kernel related to not reading from an empty FIFO).
Quoted 6 lines
Quoted 2 lines
Look for the AM37x TRM here:
http://focus.ti.com/docs/prod/folders/print/am3715.htmlAny specific section you were thinking of? I did look in the UART section of the TRM before and established that it was still driven by a 48 MHz clock.
Yes clock for UART is also 48Mhz. I think difference is how to setup main clock which will be then also used for UART. Just quessing you have latest beagleboard revision which have 3730?
Quoted 5 lines
--
Orjan Friberg
FlatFrog Laboratories AB
thanks,
marek
Signature · 15 lines
as simple and primitive as possible ------------------------------------------------- Marek Belisko - OPEN-NANDRA Freelance Developer Ruska Nova Ves 219 | Presov, 08005 Slovak Republic Tel: +421 915 052 184 skype: marekwhite icq: 290551086 web: http://open-nandra.com _______________________________________________ barebox mailing list [email protected] http://lists.infradead.org/mailman/listinfo/barebox
Quoted 3 lines · Belisko Marek
Yes clock for UART is also 48Mhz. I think difference is how to setup main clock which will be then also used for UART. Just quessing you have latest beagleboard revision which have 3730?
The board I'm trying to RAM boot with barebox is our own design, but I'd be happy to try it on a BeagleBoard xM if there's a way (mine is an A2 revision).
I'll take a look at arch/arm/mach-omap/omap3_clock.c.
Thanks,
Orjan
Signature · 7 lines
Orjan Friberg FlatFrog Laboratories AB _______________________________________________ barebox mailing list [email protected] http://lists.infradead.org/mailman/listinfo/barebox
Quoted 1 line · Orjan Friberg
I'll take a look at
arch/arm/mach-omap/omap3_clock.c.
Ok, that stuff looks like it's a bit out of my league. I guess you'd need to read the TRM very carefully and/or have a JTAG debugger handy to get it right.
Sanjeev, if you're able to make a patch I'd be grateful.
(On a related note, is everyone using MMC for bootstrapping? I'm finding very little related to rambooting the 35x or 37x.)
Signature · 7 lines
Orjan Friberg FlatFrog Laboratories AB _______________________________________________ barebox mailing list [email protected] http://lists.infradead.org/mailman/listinfo/barebox
Quoted 10 lines
-----Original Message-----
From: Orjan Friberg [mailto:[email protected]]
Sent: Friday, December 03, 2010 2:42 PM
To: Belisko Marek; Premi, Sanjeev
Cc: [email protected]
Subject: Re: Barebox on a 3730On 2010-12-03 09:08, Orjan Friberg wrote:
Quoted 8 lines
Quoted 1 line
I'll take a look at
arch/arm/mach-omap/omap3_clock.c.Ok, that stuff looks like it's a bit out of my league. I guess you'd need to read the TRM very carefully and/or have a JTAG debugger handy to
get it right.Sanjeev, if you're able to make a patch I'd be grateful.
Just started to refresh the repo. I do hope I can get it done over this weekend...
Haven't looked at barebox sources for quite long; will give my best shot...
Quoted 8 lines
(On a related note, is everyone using MMC for bootstrapping? I'm finding very little related to rambooting the 35x or 37x.)
Signature · 2 lines
Orjan Friberg FlatFrog Laboratories AB
_______________________________________________
barebox mailing list
[email protected]
http://lists.infradead.org/mailman/listinfo/barebox
Quoted 8 lines
-----Original Message-----
From: Orjan Friberg [mailto:[email protected]]
Sent: Friday, December 03, 2010 2:42 PM
To: Belisko Marek; Premi, Sanjeev
Cc: [email protected]
Subject: Re: Barebox on a 3730On 2010-12-03 09:08, Orjan Friberg wrote:
Quoted 9 lines
Quoted 1 line
I'll take a look at
arch/arm/mach-omap/omap3_clock.c.Ok, that stuff looks like it's a bit out of my league. I guess you'd need to read the TRM very carefully and/or have a JTAG debugger handy to
get it right.Sanjeev, if you're able to make a patch I'd be grateful.
Looks like I got into more than I could chew for a weekend!
I found many things missing in the process of creating the patch; and ended with a big lst of 'dirty' patches. I will be able to try them on the EVM today; but clean-up can take another day.
If I can get the board to boot, I can send the patches to you off-the-list for you to get started while I clean-up; ...if helps you.
~sanjeev
Quoted 7 lines
(On a related note, is everyone using MMC for bootstrapping? I'm finding very little related to rambooting the 35x or 37x.)
Signature · 2 lines
Orjan Friber FlatFrog Laboratories AB
_______________________________________________
barebox mailing list
[email protected]
http://lists.infradead.org/mailman/listinfo/barebox
Quoted 3 lines · Sanjeev
If I can get the board to boot, I can send the patches to you off-the-list for you to get started while I clean-up; ...if helps you.
Please do, I'd be happy to give it a spin.
Thanks,
Orjan
Signature · 7 lines
Orjan Friberg FlatFrog Laboratories AB _______________________________________________ barebox mailing list [email protected] http://lists.infradead.org/mailman/listinfo/barebox
Just fixed the issue. give me 30 mins and I will send you zip of patches to apply on latest master.
~sanjeev
Quoted 8 lines
-----Original Message-----
From: Orjan Friberg [mailto:[email protected]]
Sent: Monday, December 06, 2010 4:05 PM
To: Premi, Sanjeev
Cc: Belisko Marek; [email protected]
Subject: Re: Barebox on a 3730On 2010-12-06 03:40, Premi, Sanjeev wrote:
Quoted 13 lines
Quoted 3 lines
If I can get the board to boot, I can send the patches to you off-the-list for you to get started while I clean-up; ...if helps you.
Please do, I'd be happy to give it a spin.
Thanks,
OrjanSignature · 2 lines
Orjan Friberg FlatFrog Laboratories AB
_______________________________________________
barebox mailing list
[email protected]
http://lists.infradead.org/mailman/listinfo/barebox