Jornada 720 USB Host

Hello!
I managed to wire up a USB port to the j720. All required pins from the SA-1111 chip are present on the board.
I wired it up like in the "Intel® StrongARM® SA-1111 Development Module Schematics" page 12.
http://www.sp-net.at/wiki/lib/exe/fetch.php?media=sa1111_development_module_schematics.pdf

I took a Maxim MAX1607 as a replacement for the TPS2015 Power Distribution Switch. One bridge on the board has to be replaced by a resistor and the whole thing needs a few resistors and capacitors around the MAX1607.

The driver needs a few corrections, because the control and power-sense lines are active low with this setup!

First setup with prototype wiring:


The pads accessed under the PCMCIA slot (two more need to be accessed on the other side):


RJ11 connector replaced by USB:


The whole setup with a flash drive connected:


The problem is, it does not work as expected. The driver loads fine but is not always able to detect USB devices correctly. Sometimes it detects the hardware correct, but is not able to access it for a longer period of time.
I dont know if its a kernel/driver or a hardware problem. I am in contact with the Linux ARM mailing list about that ...
If someone has an idea whats going on, please write me!


Console output from the device not being recognized:
[ 175.554707] usb 1-1: new full-speed USB device number 2 using sa1111-ohci
[ 180.884999] usb 1-1: device descriptor read/all, error -110
[ 181.124717] usb 1-1: new full-speed USB device number 3 using sa1111-ohci
[ 192.144682] usb 1-1: device not accepting address 3, error -110
[ 192.384697] usb 1-1: new full-speed USB device number 4 using sa1111-ohci
[ 197.525621] usb 1-1: unable to read config index 0 descriptor/all
[ 197.569172] usb 1-1: can't read configurations, error -110
[ 197.804709] usb 1-1: new full-speed USB device number 5 using sa1111-ohci
[ 208.544679] usb 1-1: device not accepting address 5, error -110
[ 208.586685] usb usb1-port1: unable to enumerate USB device



Console output with a flash drive recognized correctly (but with problems first):
[ 258.644698] usb 1-1: new full-speed USB device number 2 using sa1111-ohci
[ 264.104687] usb 1-1: device descriptor read/64, error -110
[ 269.774809] usb 1-1: unable to read config index 0 descriptor/start: -110
[ 269.819320] usb 1-1: can't read configurations, error -110
[ 270.054718] usb 1-1: new full-speed USB device number 3 using sa1111-ohci
[ 280.728528] usb 1-1: New USB device found, idVendor=090c, idProduct=1000
[ 280.772179] usb 1-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3
[ 280.815679] usb 1-1: Product: USB DISK
[ 280.857967] usb 1-1: Manufacturer: SMI Corporation
[ 280.900261] usb 1-1: SerialNumber: AA04012700007537
[ 281.310530] usb-storage 1-1:1.0: USB Mass Storage device detected
[ 281.390081] scsi host0: usb-storage 1-1:1.0
[ 281.434343] usbcore: registered new interface driver usb-storage
[ 283.065640] scsi 0:0:0:0: Direct-Access USB Flash Disk 1100 PQ: 0 ANSI: 0 CCS
[ 300.646937] sd 0:0:0:0: [sda] 15858688 512-byte logical blocks: (8.12 GB/7.56 GiB)
[ 300.800529] sd 0:0:0:0: [sda] Write Protect is off
[ 300.845434] sd 0:0:0:0: [sda] Mode Sense: 43 00 00 00
[ 301.095147] sd 0:0:0:0: [sda] No Caching mode page found
[ 301.095183] sd 0:0:0:0: [sda] Assuming drive cache: write through


Bye
Stefan

Edited by _dev-null 2023-01-16 11:59 AM

Pretty cool. Too bad HP didn't think of it. It'd be really cool if it would work in CE.

What USB host driver are you using?

Hi!
I use the ohci driver with some SA-1111 specific additions.

Regards
Stefan

Have you tried booting this kernel on qemu? This will isolate the hardware issues and help you make sure that the software is working correctly

I assume you read the posts about this on the JLime forums back when they were online? Speaking of that, C:Amie, did you ever get a backup of the JLime forums? I contacted Kristoffer about it but he never got back to me :/

Hello!
No, i sadly did not read any of the posts on the Jlime forums because not everything is in the waybackmachine ... I also wrote Kristoffer on two different email addresses. No answer.

Bye
Stefan

Good News!
After a little rewiring and adding suppression chokes, I managed to get slow-speed USB devices working most of the time. So we can use keyboards an mouses.

I made a short video: https://youtu.be/zolt7LpgkK8

Bye
Stefan

We hope you'll consider writing a tutorial for this site on how to install the USB port.


Maybe it'll work with USB flash drives in CE using the Iomega Clik! USB or Deje USB mass storage driver, and/or maybe someone can get a USB HID driver to work with a mouse in CE.

No sir, nothing.

Wow, USB host finally (almost) working! That's amazing!
Considering I have a spare Jornada, I should really give this a try!

Edited by Karpour 2020-03-10 10:28 AM

Hello!

BIG update - USB Host is now "fully" working in Linux!!!
The only downside: we have to underclock the CPU. I have to investigate what is the root cause here. Maybe it is a clock issue in the kernel/driver or some EMI issue.

For now I am happy that it works!

I have successfully tested a few USB Sticks a MicroSD reader, mouses and a RS232/USB adapter.


Regards
Stefan

Stephan!

That is great news... You are simply amazing! You're using the chip layout posted on your website? How much underclock/ performance hit? You are certainly blazing trails here!!

You are such an inspiration to us all... your talent and perseverance... unbeatable. For well over a decade others had been trying to accomplish what you have finally succeeded in doing. Kudos!

The new website wiki looks good, too. You might want to try one of those USB mini- wifi/bluetooth dongles... they're really cheap ~$7 and are linux compatible too... host speed may be an issue though.

Joval

Edited by joval 2021-05-14 4:34 PM

Hello!
I had to downclock the CPU to ~192 MHz. I tested it with a lot of USB devices including some Bluetooth and Wfi dongles, external CD-ROM drives, external USB HDDs, EEPROM programers, Arduinos and much more. I even can play music with an USB sound card and ALSA. -> SSH forwarded audio also works!
If you dont draw too much power (<500mA) everything works perfectly! I also tested some active powered USB hubs - and with such one you can also drive power hungry devices like the EEPROM programmer.

I updated my site with detailed instructions: http://www.sp-net.at/doku.php?id=jornada_j720_usb_host

I would be happy if some of you guys also modify your Jornada - so all the time put into that project finally paid off!

If you have questions - ask!


Regards
Stefan

Edited by _dev-null 2023-01-16 12:00 PM

Stefan!!!!

That is unbelievably Fantastic!!! You are such a master Wizard working such magic!

I just ordered some Max1607 chips from Mouser and reviewed your usb wiki., will soon pull out the motherboard and start working on the wires, etc. . No longer using any chokes as mentioned above?The 10k resistor doesn't have to be surface mount (don't have that type but maybe can cannibalize somewhere---update: I just ordered some on mouser ). For wifi dongle, etc... any trick to installing drivers??

"I love it when a plan comes together!" (Hannibal : The A-Team).

joval

(posted on one of my J720's running Stefan's Devuan + ethernet /RasPi Hybrid)

Edited by joval 2021-05-17 5:45 PM

Regarding device drivers: I can compile all drivers as modules and upload them. Then you can put them in your /lib/modules folder and Devuan should load them automatically!

Stefan