dwc2 gadget issues

Tue Feb 28 05:44:28 PST 2017

On 2/28/2017 3:44 PM, Francesco Lavra wrote:
> Hi Vardan,
>
> On 02/28/2017 09:41 AM, Vardan Mikayelyan wrote:
>> On 2/27/2017 11:55 PM, Francesco Lavra wrote:
>>> Hi,
>>>
>>> On 02/23/2017 08:27 PM, Heiko Stuebner wrote:
>>>> Hi Francesco,
>>>>
>>>> Am Donnerstag, 23. Februar 2017, 19:11:37 CET schrieb Francesco Lavra:
>>>>> I'm having trouble getting the RK3288 OTG controller (the one at
>>>>> ff580000) to work in peripheral mode. I'm using a Firefly Reload board,
>>>>> and I know the hardware is fine because I can successfully use the port
>>>>> in device mode with U-Boot's mass storage gadget driver.
>>>>> Under Linux, the OTG port works fine when used in host mode, but fails
>>>>> to work in device mode: nothing happens when the a USB host is plugged
>>>>> into the OTG port, not even a single interrupt is generated by the
>>>>> controller. I'm using the latest device tree definitions from
>>>>> git://git.kernel.org/pub/scm/linux/kernel/git/mmind/linux-rockchip.git.
>>>>
>>>> you shouldn't use my tree as base for any real work :-) . Best to use the
>>>> regular mainline kernel or alternatively try linux-next to get all recent usb
>>>> changes schedules for the next release.
>>>
>>> Thanks for your inputs.
>>>
>>> I was actually using the mainline kernel (4.8.1), in which the dwc2
>>> driver wasn't working, that's why I went to your tree to pick up any
>>> fixes or new features that might have been done. I also went to the
>>> linux-usb tree for the same reason.
>>>
>>> Anyway, today I tried with the latest mainline release 4.10.0, and also
>>> with linux-next. Unfortunately, still no luck: I can load a gadget
>>> driver, which gets correctly bound to the OTG controller, but then
>>> nothing happens if a USB host is connected to the OTG port.
>>> I'm pasting below the dmesg contents (obtained with 4.10.0, with verbose
>>> debugging enabled for the dwc2 driver) when a gadget driver is loaded,
>>> in case you might spot something suspicious:
>>>
>>> [ 1147.035367] dwc2 ff580000.usb: bound driver g_audio
>>> [ 1147.041203] dwc2 ff580000.usb: dwc2_hsotg_pullup: is_on: 1 op_state: 3
>>> [ 1147.041250] dwc2 ff580000.usb: dwc2_core_reset()
>>> [ 1147.041345] dwc2 ff580000.usb: FIFOs reset, timeout at 100
>>> [ 1147.041405] dwc2 ff580000.usb: EP0: DIEPCTL0=0x00008000,
>>> DOEPCTL0=0x00008000
>>> [ 1147.041447] dwc2 ff580000.usb: gsintmsk now 0xd08c3cc4
>>> [ 1147.041554] dwc2 ff580000.usb: DCTL=0x00000002
>>> [ 1147.041631] dwc2 ff580000.usb: dwc2_hsotg_enqueue_setup: queueing
>>> setup request
>>> [ 1147.041692] dwc2 ff580000.usb: ep0: req ee241680: 8 at ee241198, noi=0,
>>> zero=0, snok=0
>>> [ 1147.041757] dwc2 ff580000.usb: dwc2_hsotg_start_req:
>>> DxEPCTL=0x80008000, ep 0, dir out
>>> [ 1147.041799] dwc2 ff580000.usb: ureq->length:8 ureq->actual:0
>>> [ 1147.041896] dwc2 ff580000.usb: dwc2_hsotg_start_req: 1 at 8/8,
>>> 0x00080008 => 0x00000b10
>>> [ 1147.041975] dwc2 ff580000.usb: dwc2_hsotg_start_req: 2e243000 pad =>
>>> 0x00000b14
>>> [ 1147.042014] dwc2 ff580000.usb: ep0 state:0
>>> [ 1147.042055] dwc2 ff580000.usb: dwc2_hsotg_start_req: DxEPCTL=0x80008000
>>> [ 1147.042097] dwc2 ff580000.usb: dwc2_hsotg_start_req: DXEPCTL=0x80008000
>>> [ 1147.042169] dwc2 ff580000.usb: EP0: DIEPCTL0=0x00008000,
>>> DOEPCTL0=0x80008000
>>>
>>> Thanks,
>>> Francesco
>>> --
>>
>> Hi Francesco,
>>
>> Could you please provide full log (with debugs enabled) from DWC2 driver
>> loading to issue point? Two logs are not giving us the full picture.
>
> The full log from the DWC2 driver is below:
>
> [    1.498030] dwc2 ff580000.usb: ff580000.usb supply vusb_d not found,
> using dummy regulator
> [    1.507431] dwc2 ff580000.usb: ff580000.usb supply vusb_a not found,
> using dummy regulator
> [    1.880012] dwc2 ff580000.usb: dwc2_check_param_tx_fifo_sizes:
> Invalid parameter g-tx-fifo-size, setting to default average
> [    1.892596] dwc2 ff580000.usb: EPs: 10, dedicated fifos, 972 entries
> in SPRAM
> [    1.901018] dwc2 ff580000.usb: DCFG=0x08100000, DCTL=0x00000002,
> DIEPMSK=00000000
> [    1.909432] dwc2 ff580000.usb: GAHBCFG=0x00000000, GHWCFG1=0x00006664
> [    1.916698] dwc2 ff580000.usb: GRXFSIZ=0x00000400, GNPTXFSIZ=0x00100400
> [    1.924161] dwc2 ff580000.usb: DPTx[1] FSize=256, StAddr=0x00000410
> [    1.931224] dwc2 ff580000.usb: DPTx[2] FSize=256, StAddr=0x00000900
> [    1.938261] dwc2 ff580000.usb: DPTx[3] FSize=256, StAddr=0x00000a00
> [    1.945318] dwc2 ff580000.usb: DPTx[4] FSize=256, StAddr=0x00000b00
> [    1.952375] dwc2 ff580000.usb: DPTx[5] FSize=256, StAddr=0x00000c00
> [    1.959410] dwc2 ff580000.usb: DPTx[6] FSize=256, StAddr=0x00000d00
> [    1.966456] dwc2 ff580000.usb: DPTx[7] FSize=0, StAddr=0x00000e00
> [    1.973317] dwc2 ff580000.usb: DPTx[8] FSize=0, StAddr=0x00000f00
> [    1.980180] dwc2 ff580000.usb: DPTx[9] FSize=256, StAddr=0x00000410
> [    1.987216] dwc2 ff580000.usb: ep0-in: EPCTL=0x00008800,
> SIZ=0x00000000, DMA=0x379a4f2d
> [    1.996232] dwc2 ff580000.usb: ep0-out: EPCTL=0x00008000,
> SIZ=0x00000000, DMA=0xe3103c4f
> [    2.005352] dwc2 ff580000.usb: ep1-in: EPCTL=0x00001000,
> SIZ=0x00000000, DMA=0x5cf9a35d
> [    2.014369] dwc2 ff580000.usb: ep1-out: EPCTL=0x00000000,
> SIZ=0x00000000, DMA=0x8b00a168
> [    2.023482] dwc2 ff580000.usb: ep2-in: EPCTL=0x00000000,
> SIZ=0x00000000, DMA=0xfef360cf
> [    2.032497] dwc2 ff580000.usb: ep2-out: EPCTL=0x00000000,
> SIZ=0x00000000, DMA=0x9f637bc4
> [    2.041609] dwc2 ff580000.usb: ep3-in: EPCTL=0x00002000,
> SIZ=0x00000000, DMA=0xf03470c5
> [    2.050625] dwc2 ff580000.usb: ep3-out: EPCTL=0x00000000,
> SIZ=0x00000000, DMA=0x8b00a168
> [    2.059715] dwc2 ff580000.usb: ep4-in: EPCTL=0x00000000,
> SIZ=0x00000000, DMA=0xfef360cf
> [    2.068731] dwc2 ff580000.usb: ep4-out: EPCTL=0x00000000,
> SIZ=0x00000000, DMA=0xb6c8c271
> [    2.077843] dwc2 ff580000.usb: ep5-in: EPCTL=0x00003000,
> SIZ=0x00000000, DMA=0x84245611
> [    2.086858] dwc2 ff580000.usb: ep5-out: EPCTL=0x00000000,
> SIZ=0x00000000, DMA=0x8b00a168
> [    2.095970] dwc2 ff580000.usb: ep6-in: EPCTL=0x00000000,
> SIZ=0x00000000, DMA=0xfef360cf
> [    2.104986] dwc2 ff580000.usb: ep6-out: EPCTL=0x00000000,
> SIZ=0x00000000, DMA=0x0a6c1c90
> [    2.114102] dwc2 ff580000.usb: ep7-in: EPCTL=0x00004000,
> SIZ=0x00000000, DMA=0xaccb75ec
> [    2.123111] dwc2 ff580000.usb: ep7-out: EPCTL=0x00000000,
> SIZ=0x00000000, DMA=0x8b00a168
> [    2.132222] dwc2 ff580000.usb: ep8-in: EPCTL=0x00004800,
> SIZ=0x00000000, DMA=0x4625773c
> [    2.141254] dwc2 ff580000.usb: ep8-out: EPCTL=0x00000000,
> SIZ=0x00000000, DMA=0x437c9154
> [    2.150371] dwc2 ff580000.usb: ep9-in: EPCTL=0x00005000,
> SIZ=0x00000000, DMA=0x9cb1c89c
> [    2.159365] dwc2 ff580000.usb: ep9-out: EPCTL=0x00000000,
> SIZ=0x00000000, DMA=0x6ec79617
> [    2.168476] dwc2 ff580000.usb: DVBUSDIS=0x00000b8f, DVBUSPULSE=000002c6
> [    2.175996] usb 1-1: new high-speed USB device number 2 using dwc2
> [    2.176105] dwc2 ff580000.usb: DWC OTG Controller
> [    2.176147] dwc2 ff580000.usb: new USB bus registered, assigned bus
> number 2
> [    2.176195] dwc2 ff580000.usb: irq 41, io mem 0xff580000
> [    2.176450] usb usb2: New USB device found, idVendor=1d6b, idProduct=0002
> [    2.176462] usb usb2: New USB device strings: Mfr=3, Product=2,
> SerialNumber=1
> [    2.176470] usb usb2: Product: DWC OTG Controller
> [    2.176478] usb usb2: Manufacturer: Linux 4.10.0+ dwc2_hsotg
> [    2.176485] usb usb2: SerialNumber: ff580000.usb
> [ 1147.035367] dwc2 ff580000.usb: bound driver g_audio
> [ 1147.041203] dwc2 ff580000.usb: dwc2_hsotg_pullup: is_on: 1 op_state: 3
> [ 1147.041250] dwc2 ff580000.usb: dwc2_core_reset()
> [ 1147.041345] dwc2 ff580000.usb: FIFOs reset, timeout at 100
> [ 1147.041405] dwc2 ff580000.usb: EP0: DIEPCTL0=0x00008000,
> DOEPCTL0=0x00008000
> [ 1147.041447] dwc2 ff580000.usb: gsintmsk now 0xd08c3cc4
> [ 1147.041554] dwc2 ff580000.usb: DCTL=0x00000002
> [ 1147.041631] dwc2 ff580000.usb: dwc2_hsotg_enqueue_setup: queueing
> setup request
> [ 1147.041692] dwc2 ff580000.usb: ep0: req ee241680: 8 at ee241198, noi=0,
> zero=0, snok=0
> [ 1147.041757] dwc2 ff580000.usb: dwc2_hsotg_start_req:
> DxEPCTL=0x80008000, ep 0, dir out
> [ 1147.041799] dwc2 ff580000.usb: ureq->length:8 ureq->actual:0
> [ 1147.041896] dwc2 ff580000.usb: dwc2_hsotg_start_req: 1 at 8/8,
> 0x00080008 => 0x00000b10
> [ 1147.041975] dwc2 ff580000.usb: dwc2_hsotg_start_req: 2e243000 pad =>
> 0x00000b14
> [ 1147.042014] dwc2 ff580000.usb: ep0 state:0
> [ 1147.042055] dwc2 ff580000.usb: dwc2_hsotg_start_req: DxEPCTL=0x80008000
> [ 1147.042097] dwc2 ff580000.usb: dwc2_hsotg_start_req: DXEPCTL=0x80008000
> [ 1147.042169] dwc2 ff580000.usb: EP0: DIEPCTL0=0x00008000,
> DOEPCTL0=0x80008000
>
> Thanks,
> Francesco
>
>> Thanks,
>> Vardan.
>>
>

Seems here we have fifo configuration issue. We will follow up it and 
provide feedback soon.

If it is possible, can you please provide to us register dump after 
driver loading.

Thanks,
Vardan.