[U-Boot-Users] I2C POST test known problems?

[U-Boot-Users] I2C POST test known problems?

[Robin Gilks]

Greetings

Is anyone aware of any problems with the I2C POST test - I've enabled it 
and it looks like it locks up the CPM with the busy flag in the command 
register remaining set all the time.

Does anyone know if this is (well) tested code or should I just ignore 
it and write my own...

-- 
Robin Gilks
Senior Design Engineer              Phone: (+64)(3) 357 1569
Tait Electronics                          Fax  :  (+64)(3) 359 4632
PO Box 1645 Christchurch        Email : robin.gilks at tait.co.nz
New Zealand

[U-Boot-Users] I2C POST test known problems?

[Robin Gilks]

Robin Gilks wrote:
> Greetings
> 
> Is anyone aware of any problems with the I2C POST test - I've enabled it 
> and it looks like it locks up the CPM with the busy flag in the command 
> register remaining set all the time.
> 
> Does anyone know if this is (well) tested code or should I just ignore 
> it and write my own...
Give me a chance and I'll remember that nobody else knows what I'm 
working on!!

System is mpc8xx based, very close to the Motorola FADS hardware (its 
the updated version!!).

Cheers

-- 
Robin Gilks
Senior Design Engineer              Phone: (+64)(3) 357 1569
Tait Electronics                          Fax  :  (+64)(3) 359 4632
PO Box 1645 Christchurch        Email : robin.gilks at tait.co.nz
New Zealand

[U-Boot-Users] I2C POST test known problems?

[Nye Liu]

Robin, i am also working on this eval board (and our own in house
variant) with a 866/859T

I had a patch for wolfgang but it got big and messy so I haven't
submitted it yet.

On Thu, Jul 17, 2003 at 10:27:26AM +1200, Robin Gilks wrote:
> Robin Gilks wrote:
> >Greetings
> >
> >Is anyone aware of any problems with the I2C POST test - I've enabled it 
> >and it looks like it locks up the CPM with the busy flag in the command 
> >register remaining set all the time.
> >
> >Does anyone know if this is (well) tested code or should I just ignore 
> >it and write my own...
> Give me a chance and I'll remember that nobody else knows what I'm 
> working on!!
> 
> System is mpc8xx based, very close to the Motorola FADS hardware (its 
> the updated version!!).
> 
> Cheers
> 
> -- 
> Robin Gilks
> Senior Design Engineer              Phone: (+64)(3) 357 1569
> Tait Electronics                          Fax  :  (+64)(3) 359 4632
> PO Box 1645 Christchurch        Email : robin.gilks at tait.co.nz
> New Zealand
> 
> 
> 
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-- 
Nye Liu
nliu at mrv.com
(818) 772-6235x248

"Who would be stupid enough to quote a fictitious character?"
	-- Don Quixote

[U-Boot-Users] I2C POST test known problems?

[Wolfgang Denk]

In message <20030716223857.GA13575@zumanetworks.com> you wrote:
>
> I had a patch for wolfgang but it got big and messy so I haven't
> submitted it yet.

I  think  chances  that  it  will  become  _smaller_  over  time  are
infinitesimal ...


Best regards,

Wolfgang Denk

-- 
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd at denx.de
The human race is faced with a cruel choice: work  or  daytime  tele-
vision.

[U-Boot-Users] I2C POST test known problems?

[Wolfgang Denk]

In message <3F15D14E.3020006@tait.co.nz> you wrote:
>
> System is mpc8xx based, very close to the Motorola FADS hardware (its 
> the updated version!!).

Are you sure I2C is working at all on your board?


Best regards,

Wolfgang Denk

-- 
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd at denx.de
You!  What PLANET is this!
	-- McCoy, "The City on the Edge of Forever", stardate 3134.0

[U-Boot-Users] I2C POST test known problems?

[Robin Gilks]

Wolfgang Denk wrote:
> In message <3F15D14E.3020006@tait.co.nz> you wrote:
> 
>>System is mpc8xx based, very close to the Motorola FADS hardware (its 
>>the updated version!!).
> 
> 
> Are you sure I2C is working at all on your board?
> 

I'm not at all sure - in fact I don't think there are any I2C devices on 
the board but it should still scan the address range and say pass/fail 
according to its findings without locking up. Very odd that i2c_init 
gets called twice without a problem (once from Flash very early on) and 
once later before the POST tests run without a problem but then on the 
3rd go (when called from i2c_probe) it hangs up!!

Think I'd better check its being put into Master mode otherwise it won't 
do anything until it sees a clock presumably...

-- 
Robin Gilks
Senior Design Engineer              Phone: (+64)(3) 357 1569
Tait Electronics                          Fax  :  (+64)(3) 359 4632
PO Box 1645 Christchurch        Email : robin.gilks at tait.co.nz
New Zealand

[U-Boot-Users] I2C POST test known problems?

[Wolfgang Denk]

In message <3F15DCC8.6050106@tait.co.nz> you wrote:
>
> I'm not at all sure - in fact I don't think there are any I2C devices on 
> the board but it should still scan the address range and say pass/fail 
> according to its findings without locking up. Very odd that i2c_init 

Try running the iprobe command in interactive mode and you'll see why
the test takes so long to complete. You may then  consider  switching
to use soft-i2c instead.

Best regards,

Wolfgang Denk

-- 
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd at denx.de
When you say "I wrote a program that crashed  Windows",  people  just
stare  at you blankly and say "Hey, I got those with the system, *for
free*".        - Linus Torvalds in <3itc77$9lj@ninurta.fer.uni-lj.si>

[U-Boot-Users] I2C POST test known problems?

[Wolfgang Denk]

In message <3F15CE75.7070906@tait.co.nz> you wrote:
> 
> Is anyone aware of any problems with the I2C POST test - I've enabled it 
> and it looks like it locks up the CPM with the busy flag in the command 
> register remaining set all the time.

Works fine here, both with the hardware and the software  version  of
the I2C driver:

	...
	=> log show
	<4>POST memory PASSED
	<4>POST spr PASSED
	<4>POST cache PASSED
	<4>POST watchdog <4>PASSED
	<4>POST i2c PASSED
	<4>POST cpu PASSED
	<4>POST ethernet PASSED
	<4>POST spi PASSED
	<4>POST usb PASSED
	<4>POST sysmon PASSED
	=> diag run i2c
	=> log show
	<4>POST memory PASSED
	<4>POST spr PASSED
	<4>POST cache PASSED
	<4>POST watchdog <4>PASSED
	<4>POST i2c PASSED
	<4>POST cpu PASSED
	<4>POST ethernet PASSED
	<4>POST spi PASSED
	<4>POST usb PASSED
	<4>POST sysmon PASSED
	<4>POST i2c PASSED
	=> 

> Does anyone know if this is (well) tested code or should I just ignore 
> it and write my own...

Please do not ignore it, and do not write  your  own.  If  there  are
problems I'd rather see them fixed.


Best regards,

Wolfgang Denk

-- 
Software Engineering:  Embedded and Realtime Systems,  Embedded Linux
Phone: (+49)-8142-4596-87  Fax: (+49)-8142-4596-88  Email: wd at denx.de
A supercomputer is a machine that runs an endless loop in 2 seconds.