Re: USB hostcontroller for TQM823L boards seems to work

[jari <jari.nguyen@serialsystem.com.sg>]

Hello,

I think that your FAD823 is the same as my RPX-Lite 823.
I made it work in high speed mode (usb host and usb slave), but I could not
make it work with low speed USB device as you did.
Furthermore, I am not a HW guy, please inform me your advance.

Thanks and waiting for your success,
Jari Nguyen Trung Thanh


On Thursday 06 June 2002 17:48, Christian Schroeder wrote:
> Hi all,
>
> I succeded testing the usb hostcontroller (sources from www.heeltoe.com
> written by Brad Parker).
>
> 1. Hardware
>
> - TQM823L board with mpc823e (PPC823EZTnnB2)
> - connection between X7/7 (Timer 1 output) and X9/16 (/DREQ1) to
>   enable the spi/iic microcode patch
> - 4 delay gates (74LVT244A) beetwen X32/1 resp. X32/3 (VM/VP outputs
>   of the PDIUSBP11A) and X32/2 resp. X32/4 (USBXRM and USBXRP inputs
>   of the mpc823e) required , power supply from X3/9 (+3,3V) an X3/3 (GND)
> - connection of a high speed device (hub) to the usb connector required
>   (low speed devices are only detected behind this hub)
>
> 2. Software
>
> - linux-2.4.4 kernel sources from ftp.denx.de
> - m8xxhci.c from www.heeltoe.com (added as config option CONFIG_USB_MPC8xx
>   and to .../drivers/usb/...)
>   #ifdef CONFIG_TQM823L
>   #define USE_TIMER1_FOR_SOF
>   #define USE_PA4_CLK4
>   #undef POLL_FOR_HUB
>   #endif
> - kernel configuration (.config)
>   CONFIG_UCODE_PATH=y
>   CONFIG_USB=y
>   CONFIG_USB_DEBUG=y
>   (for testing)
>   CONFIG_USB_MPC8xx=y
>   (don't include usb mouse and usb keyboard drivers for testing,
>    because the mouse an keyboard drivers claim the interfaces and
>    the sample driver cannot see any data transfers)
>   CONFIG_INPUT=y
>   CONFIG_INPUT_EVDEV=y
>   (mousedev and keybdev drivers don't link for ppc - undefined symbols)
>
> 3. Testing
>
> - I used the sample usb driver from Alessandro Rubini and Jonathan Corbet
>   and plugged it as a module to the running kernel.
>   (http://examples.oreilly.com/linuxdrive2/ldd2-samples-1.0.1.tar.gz)
> - I plugged a usb mouse and a usb keyboard to the external usb hub,
> connected to the board.
> - When I moved the mouse, pressed mouse buttons or keys on the keybord,
>   the kernel dumped the results to the console, so I think the host con-
>   troller works correctly.
>
> Thanks a lot for all help and comments.
>
> Now I want to check, if I can repeat the results with my FADS823 board,
> but I'm not sure if there is a possibility to do the necessary hardware
> modifications. Specially I don't have any idea how to insert the delay
> gates. Any hints would be greatly appreciated
>
> Christian Schroeder
>
> Dr.-Ing. Christian Schroeder
> Institut fuer Mikroelektronik- und Mechatronik-Systeme
> Langewiesener Strasse 22
> 98693 Ilmenau
> Telefon: +49 3677 678315
> Telefax: +49 3677 678337
> Mobil:   +49 173 5789172
> e-mail:  christian.schroeder@imms.de
> www:     http://www.imms.de/~christi/cs.html
> pgp:     finger christi@finger.imms.de
>
>

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