Mailing List Archive: Maemo: Users

Re: Is the N810 usb port a full host USB port?

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atmasphere at atmasphere

Oct 23, 2007, 11:37 AM

Post #1 of 5 (510 views)
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Re: Is the N810 usb port a full host USB port?

no power out... and you can't charge over it.

On 10/23/07, Brian Litzinger <brian [at] worldcontrol> wrote:
>
> Does anyone know if the N810 USB port does host mode and
> if it can supply power?
>
>
> --
> Brian Litzinger
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--
Jonathan Greene
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atmasphere at atmasphere

Oct 23, 2007, 12:21 PM

Post #2 of 5 (469 views)
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Re: Is the N810 usb port a full host USB port? [In reply to]

no idea... what would I test with?
On 10/23/07, Acadia Secure Networks <acadiasecurenets [at] aol> wrote:
>
> Jonathan,
>
> can it take power from a USB source with a suitable converter cable?
>
>
>
>
>
> Best Regards,
>
>
>
> John Holmblad
>
>
>
> Acadia Secure Networks, LLC
>
>
>
> Serving the SmartDigitalTM home, entrepreneurial enterprise, and emerging
> network service provider markets
>
>
>
> GSEC Gold, GCWN Gold, GAWN, GGSC-0100, NSA-IAM, NSA-IEM
>
> Microsoft Small Business Specialist
>
>
>
> (M) 703 407 2278
>
> (F) 703 620 5388
>
>
>
> primary email address: jholmblad [at] acadiasecurenets
>
> backup email address: jholmblad [at] verizon
>
> Jonathan Greene wrote:
> no power out... and you can't charge over it.
>
>
>
> On 10/23/07, Brian Litzinger <brian [at] worldcontrol> wrote:
>
>
> Does anyone know if the N810 USB port does host mode and
> if it can supply power?
>
>
> --
> Brian Litzinger
> _______________________________________________
> maemo-users mailing list
> maemo-users [at] maemo
> https://lists.maemo.org/mailman/listinfo/maemo-users
>
>
>
>
>

--
Jonathan Greene
+1.914.750.8740
AIM / iChat - atmasphere
gtalk / jabber - jonathangreene [at] gmail
Skype / Gizmo - JonathanGreene
blogs - http://www.atmasphere.net/wp / http://www.maemoapps.com
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john at rudd

Oct 23, 2007, 12:34 PM

Post #3 of 5 (470 views)
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Re: Is the N810 usb port a full host USB port? [In reply to]

Brian Litzinger wrote:
> Does anyone know if the N810 USB port does host mode and
> if it can supply power?

It's USB On-The-Go, which _can_ act as in Host mode with non-OTG devices
(but it's not clear to me whether the N810 would fall back to host mode
or client mode when dealing with non-OTG stuff).

As far as I know it does not supply power to the bus (that's part of
what OTG does), and it can't charge via USB.
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ub1x at gmx

Oct 24, 2007, 12:13 AM

Post #4 of 5 (468 views)
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Re: Is the N810 usb port a full host USB port? [In reply to]

Hi,

On Dienstag 23 Oktober 2007, John Rudd wrote:
> Brian Litzinger wrote:
> > Does anyone know if the N810 USB port does host mode and
> > if it can supply power?
>
> It's USB On-The-Go, which _can_ act as in Host mode with non-OTG devices
> (but it's not clear to me whether the N810 would fall back to host mode
> or client mode when dealing with non-OTG stuff).
USB OTG have normally a special plug. I know the miniUSB and microUSB standard
with 5 pins (and diverent housing for type A (host), type B (device) and type
AB (OTG)) and pin 4 defines the ID (if GND than type A, if open than type B).
Details see (found only in german language):
http://de.wikipedia.org/wiki/OTG#Farbkodierung_und_Pinouts

More details you can found at:
http://en.wikipedia.org/wiki/USB_On-The-Go
http://www.usb.org/developers/onthego/

> As far as I know it does not supply power to the bus (that's part of
> what OTG does), and it can't charge via USB.
See OTG Standard in following link:
http://www.usb.org/developers/docs/USB_OTG_1-3.pdf

--
Ciao Ulf
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dufkaf at seznam

Oct 24, 2007, 12:41 AM

Post #5 of 5 (465 views)
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Re: Is the N810 usb port a full host USB port? [In reply to]

Brian Litzinger wrote:
> Does anyone know if the N810 USB port does host mode and
> if it can supply power?

N800 (and N810 too) does host mode and does supply at least 100mA,
possibly a bit more (200mA). dmesg output from N800 with 2008 firmware
has following lines

[ 18.726562] musb_hdrc musb_hdrc: MUSB HDRC host driver
[ 18.726562] drivers/usb/core/inode.c: creating file 'devices'
[ 18.726562] drivers/usb/core/inode.c: creating file '001'
[ 18.726562] musb_hdrc musb_hdrc: new USB bus registered, assigned bus
number 1
[ 18.726562] musb_hdrc musb_hdrc: supports USB remote wakeup
[ 18.726562] usb usb1: default language 0x0409
[ 18.726562] usb usb1: new device strings: Mfr=3, Product=2,
SerialNumber=1
[ 18.726562] usb usb1: Product: MUSB HDRC host driver
[ 18.726562] usb usb1: Manufacturer: Linux 2.6.21-omap1 musb-hcd
[ 18.726562] usb usb1: SerialNumber: musb_hdrc
[ 18.726562] usb usb1: uevent
[ 18.726562] usb usb1: usb_probe_device
[ 18.726562] usb usb1: configuration #1 chosen from 1 choice
[ 18.726562] usb usb1: adding 1-0:1.0 (config #1, interface 0)
[ 18.726562] usb 1-0:1.0: uevent
[ 18.726562] hub 1-0:1.0: usb_probe_interface
[ 18.726562] hub 1-0:1.0: usb_probe_interface - got id
[ 18.726562] hub 1-0:1.0: USB hub found
[ 18.726562] hub 1-0:1.0: 1 port detected
[ 18.726562] hub 1-0:1.0: standalone hub
[ 18.726562] hub 1-0:1.0: individual port power switching
[ 18.726562] hub 1-0:1.0: no over-current protection
[ 18.726562] hub 1-0:1.0: Single TT
[ 18.726562] hub 1-0:1.0: TT requires at most 8 FS bit times (666 ns)
[ 18.726562] hub 1-0:1.0: power on to power good time: 10ms
[ 18.726562] hub 1-0:1.0: 200mA bus power budget for each child
[ 18.726562] hub 1-0:1.0: local power source is good
[ 18.726562] hub 1-0:1.0: enabling power on all ports

same output is also on N810.

Frantisek
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