[maemo-developers] Unable to get device detected with usb host mode on N800

[From: Ismo.Laitinen at nokia.com]

>-----Original Message-----
>From: maemo-developers-bounces at maemo.org 
>[mailto:maemo-developers-bounces at maemo.org] On Behalf Of ext 
>Vasudevan Srinivasan
>Sent: 26. toukokuuta 2007 17:27
>To: Tony Lindgren
>Cc: maemo-developers at maemo.org
>Subject: Re: Unable to get device detected with usb host mode on N800
>
>Hi,
>
>I'm facing an interesting condition. I got my setup working 
>again without need for any modification on the kernel. I am 
>attaching the logs of both working and non working condition.
>I could not get enough time to check without musb DMA support 
>in kernel, will try that by Monday. 
>
>Everything works fine without errors only when the N800 
>charger is plugged in. I get babble errors without that.  This 
>sounds crazy, as we cannot expect to have the n800 powered 
>whenever we want the usb-host mode. 

Instead of plugging in the charger, you could try if
"echo 0 > /sys/power/sleep_while_idle" has any effect.
It should narrow down the problem.

br, Ismo

>
>I'm not sure if this is common or only particular to my 
>device. Is there any option?
>
>
>regards,
>Vasudevan
>
>
>On 5/24/07, Tony Lindgren <tony at atomide.com> wrote:
>
>	Hi,
>	
>	* Vasudevan Srinivasan <vazudevan at gmail.com> [070524 08:47]:
>	> Hi,
>	>
>	> The host side drivers were compiled in, 
>CONFIG_USB_OTG_WHITELIST was set
>	> off. 
>	> I could not get things up with the hub, so this time 
>I cooked up a Y
>	> connector
>	> with external power source(a usb port from desktop 
>without d+ and d-),
>	> connected n800 and flash disk to other ends. 
>	>
>	> I was able to get the flash disk working only for a 
>while, after a shutdown
>	> and start of n800
>	> it stopped working with the following errors in dmesg.
>	> Have i messed up with something? Any clues / pointers? 
>	>
>	> <dmesg>
>	> [  174.530487] musb_stage0_irq 528: CONNECT (a_host) devctl 5d
>	> [  174.530578] hub 1-0:1.0: state 7 ports 1 chg 0000 evt 0002
>	> [  174.530670] hub 1-0:1.0: port 1, status 0101, 
>change 0001, 12 Mb/s 
>	> [  174.681610] hub 1-0:1.0: debounce: port 1: total 
>100ms stable 100ms
>	> status 0x101
>	> [  174.807830] usb 1-1: new high speed USB device 
>using musb_hdrc and
>	> address 2
>	> [  175.807800] usb 1-1: khubd timed out on ep0in len=0/64 
>	> [  176.807800] usb 1-1: khubd timed out on ep0in len=0/64
>	> [  177.807281] usb 1-1: khubd timed out on ep0in len=0/64
>	> [  177.932800] usb 1-1: device descriptor read/64, error -110
>	> [  182.815063 ] Unhandled trap: 0x18000010
>	> [  183.041229] usb 1-1: khubd timed out on ep0in len=0/64
>	> [  188.042236] usb 1-1: khubd timed out on ep0in len=0/64
>	> [  193.042297] usb 1-1: khubd timed out on ep0in len=0/64 
>	> [  193.167144] usb 1-1: device descriptor read/64, error -110
>	> [  193.401550] usb 1-1: new high speed USB device 
>using musb_hdrc and
>	> address 3
>	> [  194.401519] usb 1-1: khubd timed out on ep0in len=0/64 
>	> [  195.401580] usb 1-1: khubd timed out on ep0in len=0/64
>	> [  196.401550] usb 1-1: khubd timed out on ep0in len=0/64
>	> [  196.526519] usb 1-1: device descriptor read/64, error -110
>	> [  201.635925 ] usb 1-1: khubd timed out on ep0in len=0/64
>	> [  206.634796] usb 1-1: khubd timed out on ep0in len=0/64
>	> [  211.635955] usb 1-1: khubd timed out on ep0in len=0/64
>	> [  211.760955] usb 1-1: device descriptor read/64, error -110 
>	> [  211.995300] usb 1-1: new high speed USB device 
>using musb_hdrc and
>	> address 4
>	> [  217.970916] musb_h_tx_flush_fifo 126: Could not 
>flush host TX fifo: csr:
>	> 000a
>	> [  217.971984] usb 1-1: khubd timed out on ep0out len=0/0 
>	> [  224.158416] musb_h_tx_flush_fifo 126: Could not 
>flush host TX fifo: csr:
>	> 000a
>	> [  224.159545] usb 1-1: khubd timed out on ep0out len=0/0
>	> [  224.370269] usb 1-1: device not accepting address 
>4, error -110 
>	> [  224.495300] usb 1-1: new high speed USB device 
>using musb_hdrc and
>	> address 5
>	> [  230.470764] musb_h_tx_flush_fifo 126: Could not 
>flush host TX fifo: csr:
>	> 000a
>	> [  230.471771] usb 1-1: khubd timed out on ep0out len=0/0 
>	> [  236.658264] musb_h_tx_flush_fifo 126: Could not 
>flush host TX fifo: csr:
>	> 000a
>	> [  236.659729] usb 1-1: khubd timed out on ep0out len=0/0
>	> [  236.870330] usb 1-1: device not accepting address 
>5, error -110 
>	> [  236.870452] hub 1-0:1.0: state 7 ports 1 chg 0000 evt 0002
>	> [  236.870513] hub 1-0:1.0: port 1 enable change, 
>status 00000501
>	> [  355.409515] musb_stage0_irq 543: Stopping host 
>session because of babble 
>	> [  367.182983] Unhandled trap: 0x18000010
>	> </dmesg>
>	
>	Interesting, I've never seen this error. I'm suspecting 
>there are some
>	alignment issues going on which then cause USB babble errors. 
>	
>	Could you please increase the musb driver debug level by doing:
>	
>	# echo 8 > /proc/sysrq-trigger
>	# echo D3 > /proc/driver/musb_hdrc
>	
>	And then post the dmesg after plugging in your device.
>	
>	After that you may want to try to recompile the kernel 
>and leave out
>	musb DMA support by setting CONFIG_USB_INVENTRA_FIFO in 
>.config. If that
>	works let me know.
>	
>	Also please post info on the device you're connecting 
>to the USB port, 
>	such as device model and maybe the relevant part of 
>lsusb -v on your
>	Linux PC.
>	
>	Regards,
>	
>	Tony
>	
>
>
>
>
>--
>regards
>Vasudevan Srinivasan
>
>
>/* Linux: Because rebooting is for adding new hardware. */ 
>