Hi,
> -----Original Message-----
> From: Dinh Nguyen [mailto:[email protected]]
> Sent: Wednesday, January 7, 2015 1:01 AM
> To: Paul Zimmerman; Kaukab, Yousaf; [email protected]; [email protected]
> Cc: Herrero, Gregory; [email protected];
> [email protected]
> Subject: Re: [PATCH v2 00/30] usb: updates for dwc2 gadget driver
>
> On 01/06/2015 05:47 PM, Dinh Nguyen wrote:
> > On 01/05/2015 01:16 PM, Paul Zimmerman wrote:
> >> Adding Dinh to CC.
> >>
> >> Robert, Dinh, I would like to have your tested-bys for this series, please.
> >>
> >
> > This patch series is producing this error on the SOCFPGA platform.
> > I'll try to bisect to a specific patch.
> >
> > root@socfpga_cyclone5:~# [ 47.929743] dwc2 ffb40000.usb: new device is
> > low-speed
> > [ 63.873596] dwc2 ffb40000.usb: new device is low-speed
> > [ 64.219220] dwc2 ffb40000.usb: new device is low-speed
> > [ 64.421495] dwc2 ffb40000.usb: new device is low-speed
> > [ 64.834505] dwc2 ffb40000.usb: new device is high-speed
> > [ 69.899695] ------------[ cut here ]------------
> > [ 69.904315] WARNING: CPU: 0 PID: 0 at drivers/usb/dwc2/gadget.c:1352
> > s3c_hsotg_rx_data+0xc0/0xd4()
> > [ 69.913230] Modules linked in: g_mass_storage usb_f_mass_storage
> > libcomposite
> > [ 69.920385] CPU: 0 PID: 0 Comm: swapper/0 Not tainted
> > 3.19.0-rc1-00090-g4864f14 #4
> > [ 69.927917] Hardware name: Altera SOCFPGA
> > [ 69.931936] [<c0014d24>] (unwind_backtrace) from [<c001173c>]
> > (show_stack+0x10/0x14)
> > [ 69.939654] [<c001173c>] (show_stack) from [<c0461c74>]
> > (dump_stack+0x74/0x90)
> > [ 69.946857] [<c0461c74>] (dump_stack) from [<c0021138>]
> > (warn_slowpath_common+0x78/0xb4)
> > [ 69.954916] [<c0021138>] (warn_slowpath_common) from [<c0021190>]
> > (warn_slowpath_null+0x1c/0x24)
> > [ 69.963669] [<c0021190>] (warn_slowpath_null) from [<c030278c>]
> > (s3c_hsotg_rx_data+0xc0/0xd4)
> > [ 69.972162] [<c030278c>] (s3c_hsotg_rx_data) from [<c0304ac0>]
> > (s3c_hsotg_irq+0x454/0x520)
> > [ 69.980394] [<c0304ac0>] (s3c_hsotg_irq) from [<c0058c3c>]
> > (handle_irq_event_percpu+0x5c/0x1f4)
> > [ 69.989056] [<c0058c3c>] (handle_irq_event_percpu) from [<c0058e18>]
> > (handle_irq_event+0x44/0x64)
> > [ 69.997892] [<c0058e18>] (handle_irq_event) from [<c005b8d8>]
> > (handle_fasteoi_irq+0xa8/0x180)
> > [ 70.006382] [<c005b8d8>] (handle_fasteoi_irq) from [<c005856c>]
> > (generic_handle_irq+0x20/0x30)
> > [ 70.014958] [<c005856c>] (generic_handle_irq) from [<c0058668>]
> > (__handle_domain_irq+0x54/0xb4)
> > [ 70.023619] [<c0058668>] (__handle_domain_irq) from [<c0008638>]
> > (gic_handle_irq+0x20/0x5c)
> > [ 70.031937] [<c0008638>] (gic_handle_irq) from [<c0012240>]
> > (__irq_svc+0x40/0x54)
> > [ 70.039384] Exception stack(0xc0635f60 to 0xc0635fa8)
> > [ 70.044415] 5f60: 00000000 00000000 c0635fb0 c001cee0 c066cca0
> > c063c498 c046908c c066c4b2
> > [ 70.052556] 5f80: c066cca0 00000001 ef7fccc0 00000000 01000000
> > c0635fa8 c000f0fc c000f100
> > [ 70.060694] 5fa0: 600f0013 ffffffff
> > [ 70.064174] [<c0012240>] (__irq_svc) from [<c000f100>]
> > (arch_cpu_idle+0x30/0x3c)
> > [ 70.071545] [<c000f100>] (arch_cpu_idle) from [<c0050364>]
> > (cpu_startup_entry+0x138/0x224)
> > [ 70.079783] [<c0050364>] (cpu_startup_entry) from [<c05ebbb0>]
> > (start_kernel+0x304/0x35c)
> > [ 70.087921] ---[ end trace 66b76f6dcbbda3bf ]---
> > [ 79.911589] dwc2 ffb40000.usb: new device is low-speed
> >
> > Dinh
> >
>
> It looks like this patch is producing the above error.
>
> usb: dwc2: gadget: manage ep0 state in software
>
> Manage ep0 state in software to add handling of status OUT stage.
> Just toggling hsotg->setup in s3c_hsotg_handle_outdone leaves it in
> wrong state in 2-stage control transfers.
> Moreover, don't call s3c_hsotg_handle_outdone both from SetupDone and
> OutDone. Only use one of them, as for a setup packet we get both.
>
> Signed-off-by: Mian Yousaf Kaukab <[email protected]>
Thank you for testing this patchset.
I have tested g_mass_storage without dma in my setup and it is working fine.
As I don't see this problem, I need some help in figuring out what's going on.
Would it be possible for you to provide me following?
1) Console output after enabling CONFIG_USB_DWC2_DEBUG
2) Function trace
echo s3c_* > /sys/kernel/debug/tracing/set_ftrace_filter
echo function > /sys/kernel/debug/tracing/current_tracer
3) Values of following registers GSNPSID, GHWCFG1-GHWCFG4
>
> Dinh
BR,
Yousaf
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