Hi,<br><br>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.<br>I could not get enough time to check without musb DMA support in kernel, will try that by Monday.
<br><br>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.
<br><br>I'm not sure if this is common or only particular to my device. Is there any option?<br><br><br>regards,<br>Vasudevan<br><br><div><span class="gmail_quote">On 5/24/07, <b class="gmail_sendername">Tony Lindgren
</b> <<a href="mailto:tony@atomide.com">tony@atomide.com</a>> wrote:</span><blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">Hi,<br><br>
* Vasudevan Srinivasan <<a href="mailto:vazudevan@gmail.com">vazudevan@gmail.com</a>> [070524 08:47]:<br>> Hi,<br>><br>> The host side drivers were compiled in, CONFIG_USB_OTG_WHITELIST was set<br>> off.
<br>> I could not get things up with the hub, so this time I cooked up a Y<br>> connector<br>> with external power source(a usb port from desktop without d+ and d-),<br>> connected n800 and flash disk to other ends.
<br>><br>> I was able to get the flash disk working only for a while, after a shutdown<br>> and start of n800<br>> it stopped working with the following errors in dmesg.<br>> Have i messed up with something? Any clues / pointers?
<br>><br>> <dmesg><br>> [ 174.530487] musb_stage0_irq 528: CONNECT (a_host) devctl 5d<br>> [ 174.530578] hub 1-0:1.0: state 7 ports 1 chg 0000 evt 0002<br>> [ 174.530670] hub 1-0:1.0: port 1, status 0101, change 0001, 12 Mb/s
<br>> [ 174.681610] hub 1-0:1.0: debounce: port 1: total 100ms stable 100ms<br>> status 0x101<br>> [ 174.807830] usb 1-1: new high speed USB device using musb_hdrc and<br>> address 2<br>> [ 175.807800] usb 1-1: khubd timed out on ep0in len=0/64
<br>> [ 176.807800] usb 1-1: khubd timed out on ep0in len=0/64<br>> [ 177.807281] usb 1-1: khubd timed out on ep0in len=0/64<br>> [ 177.932800] usb 1-1: device descriptor read/64, error -110<br>> [ 182.815063
] Unhandled trap: 0x18000010<br>> [ 183.041229] usb 1-1: khubd timed out on ep0in len=0/64<br>> [ 188.042236] usb 1-1: khubd timed out on ep0in len=0/64<br>> [ 193.042297] usb 1-1: khubd timed out on ep0in len=0/64
<br>> [ 193.167144] usb 1-1: device descriptor read/64, error -110<br>> [ 193.401550] usb 1-1: new high speed USB device using musb_hdrc and<br>> address 3<br>> [ 194.401519] usb 1-1: khubd timed out on ep0in len=0/64
<br>> [ 195.401580] usb 1-1: khubd timed out on ep0in len=0/64<br>> [ 196.401550] usb 1-1: khubd timed out on ep0in len=0/64<br>> [ 196.526519] usb 1-1: device descriptor read/64, error -110<br>> [ 201.635925
] usb 1-1: khubd timed out on ep0in len=0/64<br>> [ 206.634796] usb 1-1: khubd timed out on ep0in len=0/64<br>> [ 211.635955] usb 1-1: khubd timed out on ep0in len=0/64<br>> [ 211.760955] usb 1-1: device descriptor read/64, error -110
<br>> [ 211.995300] usb 1-1: new high speed USB device using musb_hdrc and<br>> address 4<br>> [ 217.970916] musb_h_tx_flush_fifo 126: Could not flush host TX fifo: csr:<br>> 000a<br>> [ 217.971984] usb 1-1: khubd timed out on ep0out len=0/0
<br>> [ 224.158416] musb_h_tx_flush_fifo 126: Could not flush host TX fifo: csr:<br>> 000a<br>> [ 224.159545] usb 1-1: khubd timed out on ep0out len=0/0<br>> [ 224.370269] usb 1-1: device not accepting address 4, error -110
<br>> [ 224.495300] usb 1-1: new high speed USB device using musb_hdrc and<br>> address 5<br>> [ 230.470764] musb_h_tx_flush_fifo 126: Could not flush host TX fifo: csr:<br>> 000a<br>> [ 230.471771] usb 1-1: khubd timed out on ep0out len=0/0
<br>> [ 236.658264] musb_h_tx_flush_fifo 126: Could not flush host TX fifo: csr:<br>> 000a<br>> [ 236.659729] usb 1-1: khubd timed out on ep0out len=0/0<br>> [ 236.870330] usb 1-1: device not accepting address 5, error -110
<br>> [ 236.870452] hub 1-0:1.0: state 7 ports 1 chg 0000 evt 0002<br>> [ 236.870513] hub 1-0:1.0: port 1 enable change, status 00000501<br>> [ 355.409515] musb_stage0_irq 543: Stopping host session because of babble
<br>> [ 367.182983] Unhandled trap: 0x18000010<br>> </dmesg><br><br>Interesting, I've never seen this error. I'm suspecting there are some<br>alignment issues going on which then cause USB babble errors.
<br><br>Could you please increase the musb driver debug level by doing:<br><br># echo 8 > /proc/sysrq-trigger<br># echo D3 > /proc/driver/musb_hdrc<br><br>And then post the dmesg after plugging in your device.<br><br>
After that you may want to try to recompile the kernel and leave out<br>musb DMA support by setting CONFIG_USB_INVENTRA_FIFO in .config. If that<br>works let me know.<br><br>Also please post info on the device you're connecting to the USB port,
<br>such as device model and maybe the relevant part of lsusb -v on your<br>Linux PC.<br><br>Regards,<br><br>Tony<br></blockquote></div><br><br clear="all"><br>-- <br>regards<br>Vasudevan Srinivasan<br><br><br>/* Linux: Because rebooting is for adding new hardware. */