USB Composite in STM32MP157c

AKokk · ‎2021-11-21

I am struggling to achieve a USB gadget with Mass Storage + rndis.

When i start each service alone everything works but when i am trying

to start both of them i receive the following error:

dwc2_hsotg_ep_enable: No suitable fifo found

Any suggestion how to modify the dtsi in order to achieve it .

Speed is not a conserne i can reduce the speed to full-speed as well.

Thanks,

Thanasis

AKokk · ‎2022-01-07

Hello @Kevin HUBER ,

No I solved the issue by changing the usbotg_hs: usb-otg@49000000 device tree to :

g-rx-fifo-size = <256>;

g-np-tx-fifo-size = <32>;

g-tx-fifo-size = <128 128 128 128 64 32 16 16>;

Regards,

Thanasis

View solution in original post

Olivier GALLIEN · ‎2021-11-22

Hi @AKokk ,

Could you please share more details about context ? ST board or custom design ?

Which OpenSTLinux ecosystem version ?

Providing complete logs in text format would also greatly help

Thanks

Olivier

Olivier GALLIEN
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AKokk · ‎2021-11-22

Hi @Community member ,

Thanks for your reply.

We are using a custom board based on the QSMP-1570 from Karo-Electronics .

We are using a yocto image based on Linux 5.10.23 Mainline + STM patches provided by karo electronics.

We have modified the drivers/usb/dwc2/gadget.c in order to receive information

about the FIFO size with the following patch:

if (!fifo_index) {

dev_err(hsotg->dev,

- "%s: No suitable fifo found\n", __func__);

+ "%s: No suitable fifo of size %u found\n", __func__,

+ size);

The error we receive is the following:

dwc2 49000000.usb-otg: dwc2_hsotg_ep_enable: No suitable fifo of size 512 found

Usb Speed is not a concern for our project .

Our dtsi for the otg drivers looks like :

usbotg_hs: usb-otg@49000000

{

compatible = "st,stm32mp1-hsotg", "snps,dwc2";

reg = <0x49000000 0x10000>; clocks = <&rcc USBO_K>;

clock-names = "otg"; resets = <&rcc USBO_R>;

reset-names = "dwc2";

interrupts-extended = <&intc GIC_SPI 98 IRQ_TYPE_LEVEL_HIGH>, <&exti 44 1>;

interrupt-names = "event", "wakeup";

g-rx-fifo-size = <512>;

g-np-tx-fifo-size = <32>;

g-tx-fifo-size = <256 16 16 16 16 16 16 16>; dr_mode = "otg";

usb33d-supply = <&usb33>;

power-domains = <&pd_core>;

wakeup-source; status = "disabled";

};

The log of the error is the following:

root@qsmp-1570:~# modprobe g_multi file=/home/usbdisk.img host_addr=11:22:33:44

55:66 dev_addr=aa:bb:cc:dd:ee:ff

[ 118.270433] using random self ethernet address

[ 118.273593] using random host ethernet address

[ 118.277883] using self ethernet address: aa:bb:cc:dd:ee:ff

[ 118.278274] Mass Storage Function, version: 2009/09/11

[ 118.288833] LUN: removable file: (no medium)

[ 118.293136] LUN: file: /home/usbdisk.img

[ 118.296663] Number of LUNs=1

[ 118.300585] usb0: HOST MAC ea:db:58:44:90:f4

[ 118.304223] usb0: MAC aa:bb:cc:dd:ee:ff

[ 118.308341] g_multi gadget: Multifunction Composite Gadget

[ 118.313260] g_multi gadget: userspace failed to provide iSerialNumber

[ 118.319731] g_multi gadget: g_multi ready

[ 118.323834] dwc2 49000000.usb-otg: bound driver g_multi

root@qsmp-1570:~# [ 118.482754] dwc2 49000000.usb-otg: new device is high-spee

[ 118.516042] ------------[ cut here ]------------

[ 118.519225] WARNING: CPU: 0 PID: 0 at kernel/dma/debug.c:1012 check_unmap+0x84/0xa1c

[ 118.527037] DMA-API: dwc2 49000000.usb-otg: device driver frees DMA memory with different direction [device address=0x00000000c41fd000] [size=18 bytes] [map ed with DMA_TO_DEVICE] [unmapped with DMA_FROM_DEVICE]

[ 118.545826] Modules linked in: g_multi

[ 118.549576] CPU: 0 PID: 0 Comm: swapper/0 Not tainted 5.10.23-karo+gdfbf345b3c3 #1

[ 118.557225] Hardware name: STM32 (Device Tree Support)

[ 118.562380] [<c010e11c>] (unwind_backtrace) from [<c010aa48>] (show_stack+0x0/0x14)

[ 118.570117] [<c010aa48>] (show_stack) from [<c095707c>] (dump_stack+0x94/0xa

[ 118.577338] [<c095707c>] (dump_stack) from [<c0952a54>] (__warn+0xb8/0x114)

[ 118.584297] [<c0952a54>] (__warn) from [<c0952b48>] (warn_slowpath_fmt+0x98/xc0)

[ 118.591781] [<c0952b48>] (warn_slowpath_fmt) from [<c018796c>] (check_unmap+x184/0xa1c)

[ 118.599873] [<c018796c>] (check_unmap) from [<c0188298>] (debug_dma_unmap_pae+0x94/0x9c)

[ 118.608056] [<c0188298>] (debug_dma_unmap_page) from [<c06d51a8>] (usb_gadge_unmap_request+0x7c/0x90)

[ 118.617366] [<c06d51a8>] (usb_gadget_unmap_request) from [<c06a3a38>] (dwc2_sotg_complete_request+0xec/0x1dc)

[ 118.627371] [<c06a3a38>] (dwc2_hsotg_complete_request) from [<c06a5234>] (dw2_hsotg_handle_outdone+0x220/0x2d4)

[ 118.637552] [<c06a5234>] (dwc2_hsotg_handle_outdone) from [<c06a5f98>] (dwc2hsotg_epint+0x20c/0x7ec)

[ 118.646777] [<c06a5f98>] (dwc2_hsotg_epint) from [<c06a7a4c>] (dwc2_hsotg_ir.part.0+0x438/0x6f0)

[ 118.655653] [<c06a7a4c>] (dwc2_hsotg_irq.part.0) from [<c016cce0>] (__handleirq_event_percpu+0x50/0x130)

[ 118.665223] [<c016cce0>] (__handle_irq_event_percpu) from [<c016cea0>] (hande_irq_event+0x5c/0xc8)

[ 118.674274] [<c016cea0>] (handle_irq_event) from [<c01719ac>] (handle_fasteo_irq+0x9c/0x204)

[ 118.682801] [<c01719ac>] (handle_fasteoi_irq) from [<c016c55c>] (__handle_doain_irq+0x80/0xd4)

[ 118.691504] [<c016c55c>] (__handle_domain_irq) from [<c04cdd48>] (gic_handleirq+0x70/0x84)

[ 118.699858] [<c04cdd48>] (gic_handle_irq) from [<c0100b0c>] (__irq_svc+0x6c/xa8)

[ 118.707331] Exception stack(0xc0e01f28 to 0xc0e01f70)

[ 118.712385] 1f20: 00000000 0000d104 d7afa8c4 c01145e0 c0e0000 00000000

[ 118.720566] 1f40: 00000000 c0e00000 00000000 410fc075 10c5387d 00000000 000227a c0e01f78

[ 118.728743] 1f60: c0107efc c0107f00 60070013 ffffffff

[ 118.733800] [<c0100b0c>] (__irq_svc) from [<c0107f00>] (arch_cpu_idle+0x38/03c)

[ 118.741197] [<c0107f00>] (arch_cpu_idle) from [<c0148144>] (cpuidle_idle_cal+0x198/0x22c)

[ 118.749462] [<c0148144>] (cpuidle_idle_call) from [<c0148284>] (do_idle+0xac0xe0)

[ 118.757032] [<c0148284>] (do_idle) from [<c01485a8>] (cpu_startup_entry+0x180x20)

[ 118.764605] [<c01485a8>] (cpu_startup_entry) from [<c0d00de8>] (start_kernel 0x35c/0x37c)

[ 118.772776] ---[ end trace ce7310cc6145e5e1 ]---

[ 118.777386] DMA-API: Mapped at:

[ 118.780524] dma_map_page_attrs+0x70/0xd4

[ 118.784529] usb_gadget_map_request_by_dev.part.0+0xe8/0x1ec

[ 118.790184] dwc2_hsotg_ep_queue.constprop.0+0x224/0x418

[ 118.795492] dwc2_hsotg_ep_queue_lock+0x30/0x48

[ 118.800016] composite_ep0_queue.constprop.0+0x20/0x9c

[ 118.805310] dwc2 49000000.usb-otg: new address 2

[ 118.859559] usb0: qlen 10

[ 118.860789] dwc2 49000000.usb-otg: dwc2_hsotg_ep_enable: No suitable fifo of size 512 found

[ 120.434028] usb0: gether_disconnect

Kevin HUBER · ‎2022-01-05

Hello @AKokk ,

Do you still encounter the problem?

Regards,

Kevin

In order to give better visibility on the answered topics, please click on 'Accept as Solution' on the reply which solved your issue or answered your question.

AKokk · ‎2022-01-07

Hello @Kevin HUBER ,

No I solved the issue by changing the usbotg_hs: usb-otg@49000000 device tree to :

g-rx-fifo-size = <256>;

g-np-tx-fifo-size = <32>;

g-tx-fifo-size = <128 128 128 128 64 32 16 16>;

Regards,

Thanasis

Kevin HUBER · ‎2022-01-07

Hi @AKokk ,

Great! Thanks for your reply with the solution.

As an explanation for other users, the default configuration is:

g-tx-fifo-size = <256 16 16 16 16 16 16 16>;

This configuration is made to use only one usb gadget function.

If you want to use more than one function at the same time, here Mass Storage + RNDIS, you have at least to increase the size of the second fifo.

What you did by setting:

g-rx-fifo-size = <256>;

g-np-tx-fifo-size = <32>;

g-tx-fifo-size = <128 128 128 128 64 32 16 16>;

Regards,

Kevin

In order to give better visibility on the answered topics, please click on 'Accept as Solution' on the reply which solved your issue or answered your question.