Felipe, On Thu, May 14, 2015 at 4:04 PM, Bin Liu <binmlist@xxxxxxxxx> wrote: > Felipe, > > On Thu, May 14, 2015 at 2:29 PM, Felipe Balbi <balbi@xxxxxx> wrote: >> On Thu, May 14, 2015 at 02:29:20PM -0500, Bin Liu wrote: >>> On Thu, May 14, 2015 at 2:21 PM, Felipe Balbi <balbi@xxxxxx> wrote: >>> > On Thu, May 14, 2015 at 02:19:28PM -0500, Bin Liu wrote: >>> >> Felipe, >>> >> >>> >> On Thu, May 14, 2015 at 2:04 PM, Felipe Balbi <balbi@xxxxxx> wrote: >>> >> > On Thu, May 14, 2015 at 12:49:07PM -0500, Felipe Balbi wrote: >>> >> >> On Thu, May 14, 2015 at 12:40:31PM -0500, Felipe Balbi wrote: >>> >> >> > On Thu, May 14, 2015 at 12:07:00PM -0500, Felipe Balbi wrote: >>> >> >> > > Hi, >>> >> >> > > >>> >> >> > > On Wed, Feb 25, 2015 at 01:11:22PM +0100, Yegor Yefremov wrote: >>> >> >> > > > On 25.02.2015 12:11, Maxime Ripard wrote: >>> >> >> > > > > On Tue, Feb 24, 2015 at 11:33:57AM -0600, Felipe Balbi wrote: >>> >> >> > > > >> Hi, >>> >> >> > > > >> >>> >> >> > > > >> On Tue, Feb 24, 2015 at 05:50:50PM +0100, Maxime Ripard wrote: >>> >> >> > > > >>> Hi Felipe, >>> >> >> > > > >>> >>> >> >> > > > >>> On Tue, Feb 24, 2015 at 08:54:01AM -0600, Felipe Balbi wrote: >>> >> >> > > > >>>> Hi, >>> >> >> > > > >>>> >>> >> >> > > > >>>> On Tue, Feb 24, 2015 at 11:39:11AM +0100, Maxime Ripard wrote: >>> >> >> > > > >>>>> On Thu, Feb 05, 2015 at 02:21:42PM +0100, Maxime Ripard wrote: >>> >> >> > > > >>>>>> Hi, >>> >> >> > > > >>>>>> >>> >> >> > > > >>>>>> On Thu, Jan 22, 2015 at 08:37:45AM +0100, Yegor Yefremov wrote: >>> >> >> > > > >>>>>>> I have the same experience with 3.15. The switching is working when >>> >> >> > > > >>>>>>> CONFIG_USB_MUSB_DUAL_ROLE is set and dr_mode = "otg". But since 3.16 >>> >> >> > > > >> >>> >> >> > > > >> since 3.16 ? >>> >> >> > > > > >>> >> >> > > > > That's what Yegor said. I never saw it working with 3.15 either. >>> >> >> > > > >>> >> >> > > > I've used 3.15.1 and 3.15.2 with this set of patches: >>> >> >> > > > https://github.com/visionsystemsgmbh/onrisc_br_bsp/tree/master/board/vscom/kernel-patches/linux-3.15 >>> >> >> > > > >>> >> >> > > > And it worked so far. The system: >>> >> >> > > > http://www.visionsystems.de/produkte/baltos-ir-5221.html >>> >> >> > > >>> >> >> > > I've had more time to look into this (thanks Yegor for sponsoring a >>> >> >> > > test/dev platform) what I noticed is that Connect IRQ takes seconds to >>> >> >> > > fire up. Below a tiny log snippet after pluging USB OTG adapter cable >>> >> >> > > that came with IR5521: >>> >> >> > > >>> >> >> > > | [ 1227.200514] musb-hdrc musb-hdrc.1.auto: usbintr (100) epintr(0) >>> >> >> > > >>> >> >> > > Cable connected. ID is grounded. 0x100 == DRVVBUS IRQ >>> >> >> > > >>> >> >> > > | [ 1227.206788] musb-hdrc musb-hdrc.1.auto: VBUS on (a_wait_vrise), devctl 19 >>> >> >> > > >>> >> >> > > MUSB starts to wait for VBUS to reach Session valid threshold >>> >> >> > > >>> >> >> > > | [ 1230.281159] musb-hdrc musb-hdrc.1.auto: usbintr (10) epintr(0) >>> >> >> > > >>> >> >> > > 3 seconds later connect interrupt happens. Looking at VBUS charge time >>> >> >> > > with a scope, it's quite ok. VBUS charges in about 1.77ms. I'll dig >>> >> >> > > further into this. >>> >> >> > >>> >> >> > even more weird. If I disconnect device from OTG adapter, rather than >>> >> >> > OTG adapter from IR5521, this leave ID pin grounded, which means DRVVBUS >>> >> >> > is still asserted and VBUS remains above session valid threshold. >>> >> >> > >>> >> >> > Even in this case, when I connect the device on the other end of the >>> >> >> > cable, I still see some 3 seconds delay from the time device is >>> >> >> > connected, to the time connect IRQ fires up. >>> >> >> >>> >> >> seems to be a problem with the USB stick I'm using. Tested two other >>> >> >> devices and they connect right away. >>> >> > >>> >> > ok, fixing DRD on AM335x will take longer than I originally expected, >>> >> > probably won't be ready for v4.2 :-( >>> >> >>> >> Are you able replicate the issue with TI AM335x GP EVM? I am wondering >>> >> if the is custom board design problem? have you checked the custom >>> >> board schematics? >>> > >>> > don't have either AM335x GP EVM nor schematics for this board. But it's >>> > certainly not a problem with the board. It's very easy to replicate the >>> > problem: >>> > >>> > Set dr-mode to otg, load g_zero, connect to PC and as quickly as you >>> > can, remove cable and attach otg cable with a mouse or whatever on the >>> > other end. >>> > >>> > First time, mouse won't enumerate (no IRQs fire) remove and connect >>> > again. You should see a Babble IRQ. >>> >>> And this only happens with 3.16+, not older kernels? I have a GP EVM, >>> and can try to take a look. >> >> yeah, if you can try with v4.1-rc3, that'd be great. I also see that >> disconnect IRQ takes a while to fire, but VBUS drops rather fast on this >> board (< 10ms to discharge VBUS). > > How low is VBUS after 10ms? I don't have a scope with me right now, > but I see Diconnect IRQ happened right away if I short VBUS to ground > right after disconnected from the host. So I suspect is that VBUS > discharge takes ~20sec on my board, which is the time taken for MUSB > from b_peripheral to b_idle. > > BTY, it seems Disconnect IRQ is expected for MUSB in device mode. I > never pay attention on this. I think I found the root cause of the problem: board design issue - I bet the custom board has too much cap on VBUS line. It should be < 10uF. I just noticed I have the Jumper 36 on on my EVM, which adds 154.7uF cap on VBUS causing discharge takes ~20sec. After removed the jumper, which leaves only 4.7uF cap on VBUS, now it only takes ~0.4sec to generate Disconnect IRQ. Here is the log. root@:~# [ 2504.893123] musb-hdrc musb-hdrc.0.auto: usbintr (1) epintr(0) [ 2504.899198] musb-hdrc musb-hdrc.0.auto: <== DevCtl=99, int_usb=0x1 [ 2504.912751] zero gadget: suspend [ 2504.916145] zero gadget: zero_suspend [ 2505.303937] musb-hdrc musb-hdrc.0.auto: usbintr (20) epintr(0) [ 2505.310072] musb-hdrc musb-hdrc.0.auto: <== DevCtl=88, int_usb=0x20 [ 2505.325355] zero gadget: reset config [ 2507.303288] musb-hdrc musb-hdrc.0.auto: Poll devctl 80 (b_idle) Regards, -Bin. > > Regards, > -Bin. > >> >>> /me just figured out the modem issue, and in a very good mood now ;) >> >> hey, congrats :-) >> >> -- >> balbi -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
