Hi Harsha,
As Cristy requested, Please post the query in e2e forum.
Harsha mentioned
- In one of the port is USB Hub present in the Gateway device.
- When connected to this port, the RNDIS is NOT working over this port.
- However, when connected to another USB port (which is not a HUB), it works fine.
Since your device USB port (RNDIS) getting detected from another host, could you please share the device enumeration log when the same device trying to connect through USB HUB port?
USB OTG port as a device, is it self powered or powered from USB HUB?
Please also share your USB OTG schematic.
Thanks & Regards,
Dhinesh.
From: Kumar, Harsha
Sent: Friday, May 7, 2021 10:27 AM
To: Griffis, Brad <bgriffis@ti.com>
Cc: Aerram, Raghu <Raghavendra.Aerram@Carrier.com>; N, Anantha <anantha.n@carrier.com>; Mangiahgari, Phani Pavan Kumar <phanipavan.mangaiahgari@carrier.com>; Stoddard, Paul <Paul.Stoddard@Carrier.com>; Gogada, Sumanth <Sumanth.Gogada@Carrier.com>; Fatima, Fariya <Fariya.Fatima@Carrier.com>; Telesca, Paul <Paul.Telesca@carrier.com>; Cristy, Dan <d-cristy@ti.com>
Subject: RE: [External]RE: USB HUB connection to TI's AM335x platform
Hi Brad,
Thanks for the quick reply. I will start a thread in the forum as well on this.
However, please note we are using dual-mode USB controller in TI’s AM335x.
[Brad wrote]:
- In summary, I think you’re saying that USB host mode is working fine, but when you try to operate as a RNDIS device, it’s not working properly.
- Is that correct?
- No, the OTG dual-mode controller should either act as Slave or host dynamically depending on the configuration in DTS.
- i.e. dr_mode-> OTG
However, we are connecting to another Gateway device to this port using USB TypeA->TypeB connector cable:
- The Gateway device has multiple USB ports.
- In one of the port is USB Hub present in the Gateway device.
- When connected to this port, the RNDIS is NOT working over this port.
- However, when connected to another USB port (which is not a HUB), it works fine.
Thanks,
Harsha.
From: Kumar, Harsha <harsha.kumar@carrier.com>
Sent: Thursday, May 06, 2021 11:41 AM
To: Griffis, Brad <bgriffis@ti.com>
Cc: Aerram, Raghu <Raghavendra.Aerram@Carrier.com>; N, Anantha <anantha.n@carrier.com>; Mangiahgari, Phani Pavan Kumar <phanipavan.mangaiahgari@carrier.com>; Stoddard, Paul <Paul.Stoddard@Carrier.com>; Gogada, Sumanth <Sumanth.Gogada@Carrier.com>; Fatima, Fariya <Fariya.Fatima@Carrier.com>; Telesca, Paul <Paul.Telesca@carrier.com>
Subject: [EXTERNAL] USB HUB connection to TI's AM335x platform
Hi,
Currently, we are using TI’s AM335x SoC processor for our product.
We needed information about the Dual-mode USB OTG Controller in AM335x platforms usage for our use case:
- Configured USB0 in OTG mode (via DTS) for dual-mode OTG host controller
- The controller (and Linux configuration and driver) functions correctly when a slave flash device is connected over USB
- The controller functions correctly when configured as RNDIS network over USB connected to slave device.
However, when a USB HUB is connected on the other side , the controller does not function as expected _or_ no communication get established with the USB- hub.
Please let us know if we are missing something in the Linux configurations or driver module installation in our build? This would be helpful to proceed further on this.
The following drivers are installed on the controller: and DTS configured to be OTG in ‘dr_mode’ field of DTS.
- configfs 28990 3 usb_f_rndis,libcomposite
- crypto_engine 7162 1 omap_aes_driver
- ecb 1909 0
- hmac 2735 0
- md5 2219 0
- musb_am335x 1426 0
- musb_dsps 9670 0
- musb_hdrc 86812 1 musb_dsps
- omap_wdt 4634 0
- phy_am335x 2372 1
- phy_am335x_control 2873 1 phy_am335x
- phy_generic 5372 1 phy_am335x
- pinmux_helper 1738 0
- pm33xx 6433 0
- pruss_soc_bus 4105 0
- remoteproc 28109 2 wkup_m3_rproc,wkup_m3_ipc
- rtc_omap 9662 1
- rtc_pcf85263 9565 0
- sch_fq_codel 8923 10
- sha1_arm 3862 1 sha1_arm_neon
- sha1_arm_neon 6261 0
- sha1_generic 2864 0
- sha256_generic 10178 0
- ti_am335x_adc 6761 0
- ti_am335x_tscadc 6162 1 ti_am335x_adc
- ti_emif_sram 5587 1 pm33xx
- udc_core 19322 4 musb_hdrc,u_ether,usb_f_rndis,libcomposite
- usb_common 4737 6 phy_am335x,udc_core,musb_hdrc,libcomposite,musb_dsps,usbcore
- usbcore 201089 1 musb_hdrc
- virtio 7614 1 remoteproc
- virtio_ring 15236 1 remoteproc
- wkup_m3_ipc 8112 1 pm33xx
- wkup_m3_rproc 3650 1
- wl12xx 55232 0
- xt_limit 1731 0
- xt_state 1200 0
Thanks,
Harsha.