STM32F723E-Disco: how to use USB in high-speed mode


Dirk-Jan C. Binnema
 

Dear List,

I'm trying to use the USB-OTG HS port on an STM32F723E Discovery Board
to mount a ramdisk on a Linux 5.11 host; this works fine in FS-mode;
however, I want to use high-speed mode instead.

In an overlay file I have:
------------------------------------------------------------
&usbotg_fs {
status = "disabled";
};

&usbotg_hs {
pinctrl-0 = <&usb_otg_hs_dm_pb14 &usb_otg_hs_dp_pb15>;
maximum-speed = "high-speed";
status = "okay";
};
------------------------------------------------------------
(based on the data sheet / some older posts)

This *almost* works, but Linux fails to mount (dmesg output):
------------------------------------------------------------
usb 1-3: new high-speed USB device number 6 using xhci_hcd
usb 1-3: device descriptor read/64, error -71
usb 1-3: config 1 interface 0 altsetting 0 bulk endpoint 0x81 has invalid maxpacket 64
usb 1-3: config 1 interface 0 altsetting 0 bulk endpoint 0x1 has invalid maxpacket 64
usb 1-3: New USB device found, idVendor=2fe3, idProduct=0100, bcdDevice= 2.06
usb 1-3: New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 1-3: Product: USB-DEV
usb 1-3: Manufacturer: ZEPHYR
usb 1-3: SerialNumber: 363238313136510A
usb-storage 1-4.2:1.1: USB Mass Storage device detected
scsi host10: usb-storage 1-4.2:1.1
usb-storage 1-3:1.0: USB Mass Storage device detected
scsi host11: usb-storage 1-3:1.0
usbcore: registered new interface driver usb-storage
usbcore: registered new interface driver uas
scsi 11:0:0:0: Direct-Access ZEPHYR ZEPHYR USB DISK 0.01 PQ: 0 ANSI: 0 CCS
sd 11:0:0:0: Attached scsi generic sg2 type 0
sd 11:0:0:0: [sdc] 192 512-byte logical blocks: (98.3 kB/96.0 KiB)
sd 11:0:0:0: [sdc] Write Protect is off
sd 11:0:0:0: [sdc] Mode Sense: 03 00 00 00
sd 11:0:0:0: [sdc] No Caching mode page found
sd 11:0:0:0: [sdc] Assuming drive cache: write through
usb 1-3: reset high-speed USB device number 6 using xhci_hcd
usb 1-3: reset high-speed USB device number 6 using xhci_hcd
usb 1-3: reset high-speed USB device number 6 using xhci_hcd
usb 1-3: reset high-speed USB device number 6 using xhci_hcd
usb 1-3: reset high-speed USB device number 6 using xhci_hcd
usb 1-3: reset high-speed USB device number 6 using xhci_hcd
sd 11:0:0:0: [sdc] tag#0 FAILED Result: hostbyte=DID_ERROR driverbyte=DRIVER_OK cmd_age=2s
sd 11:0:0:0: [sdc] tag#0 CDB: Read(10) 28 00 00 00 00 00 00 00 08 00
blk_update_request: I/O error, dev sdc, sector 0 op 0x0:(READ) flags 0x0 phys_seg 1 prio class 0
Buffer I/O error on dev sdc, logical block 0, async page read
sb 1-3: reset high-speed USB device number 6 using xhci_hcd
(repeating)
------------------------------------------------------------


Just for testing, When I set "maximum-speed" to "full-speed" in the
overlay (i.e, using the HS in FS mode), I get:


------------------------------------------------------------
usb 1-4: new full-speed USB device number 88 using xhci_hcd
usb 1-4: New USB device found, idVendor=2fe3, idProduct=0100, bcdDevice= 2.06
usb 1-4: New USB device strings: Mfr=1, Product=2, SerialNumber=3
usb 1-4: Product: USB-DEV
usb 1-4: Manufacturer: ZEPHYR
usb 1-4: SerialNumber: 363238313136510A
usb-storage 1-4:1.0: USB Mass Storage device detected
scsi host11: usb-storage 1-4:1.0
scsi 11:0:0:0: Direct-Access ZEPHYR ZEPHYR USB DISK 0.01 PQ: 0 ANSI: 0 CCS
sd 11:0:0:0: Attached scsi generic sg3 type 0
sd 11:0:0:0: [sdd] 192 512-byte logical blocks: (98.3 kB/96.0 KiB)
sd 11:0:0:0: [sdd] Write Protect is off
sd 11:0:0:0: [sdd] Mode Sense: 03 00 00 00
sd 11:0:0:0: [sdd] No Caching mode page found
sd 11:0:0:0: [sdd] Assuming drive cache: write through
sdd:
sd 11:0:0:0: [sdd] Attached SCSI removable disk
------------------------------------------------------------

that gets me a little further, and I it even shows up in the linux file
browser as a mount-point browser ("98 KB Volume"); however, trying to
mount does not work (times out).

So to summarize, with the same code, using the FS-connection works; the
HS connection does not, even though it seems we're close.

Any idea of what I'm missing, or what I should check? Any insights very
much appreciated!

Kind regards,
Dirk.

--
Dirk-Jan C. Binnema Helsinki, Finland
e:djcb@djcbsoftware.nl w:www.djcbsoftware.nl
gpg: 6987 9CED 1745 9375 0F14 DA98 11DD FEA9 DCC4 A036

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