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==Peripheral USB Host USB2 OTG == The USB2 Type-C port requires to configure the USB VBUS regulator and the '''gpio''' used for enabling the 5V USB power switch in Host mode.

&usb3_phy0 usb3_phy1 { vbus-power-supply = <&ptn5110>; fsl,phy-tx-vref-tune = <6>; fsl,phy-tx-rise-tune = <0>; fsl,phy-tx-preemp-amp-tune = <3>; fsl,phy-comp-dis-tune = <7>; fsl,pcs-tx-deemph-3p5db = <0x21>; fsl,phy-pcs-tx-swing-full = <0x7f2>;

&usb3_0 usb3_1 {

&usb_dwc3_0 usb_dwc3_1 { dr_mode = "hostotg"; extcon = <&extcon_usbotg2>; hnp-disable; srp-disable; adp-disable; rsp-disable; disable-over-current;

From <code>imx8mm-mito8mmini.dtsdtsi</code>:

===Accessing =Linux messages in host mode==== When a USB 2.0 peripheral is inserted, in the following example a memory mass storage device, the kernel recognizes the device (i.e. class, vendor id, product id, etc.) <pre class="workstation-terminal">root@desk-mx8mp:~# [ 949.406404] [ 6491.481175] usb 3-1: new high-speed USB device number 3 using xhci-hcd[ 6491.639810] usb-storage 3-1:1.0: USB Mass Storage device detected [ 6491.646905] scsi host0: usb-storage 3-1:1.0 [ 6493.775259] scsi 0:0:0:0: Direct-Access Fanxiang F206 1100 PQ: 0 ANSI: 4[ 6493.786654] sd 0:0:0:0: [sda] 61440000 512-byte logical blocks: (31.5 GB/29.3 GiB) [ 6493.795475] sd 0:0:0:0: [sda] Write Protect is off [ 6493.801799] sd 0:0:0:0: [sda] Write cache: enabled, read cache: enabled, doesn't support DPO or FUA[ 6493.818546] sda: sda1 [ 6493.824653] sd 0:0:0:0: [sda] Attached SCSI removable diskroot@desk-mx8mp:~#</pre> When a USB 3.0 peripheralis inserted, in the following example a memory mass storage device, the kernel recognizes the device (i.e. class, vendor id, product id, etc.) <pre class==="workstation-terminal">root@desk-mx8mp:~# [ 6798.669673] usb 4-1: new SuperSpeed USB device number 3 using xhci-hcd[ 6798.703673] usb-storage 4-1:1.0: USB Mass Storage device detected[ 6798.710479] scsi host1: usb-storage 4-1:1.0[ 6799.719808] scsi 1:0:0:0: Direct-Access Wilk USB DISK 3.0 PMAP PQ: 0 ANSI: 6[ 6799.732902] sd 1:0:0:0: [sdb] 60628992 512-byte logical blocks: (31.0 GB/28.9 GiB)[ 6799.741747] sd 1:0:0:0: [sdb] Write Protect is off[ 6799.747177] sd 1:0:0:0: [sdb] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA[ 6799.934800] sdb:[ 6799.940848] sd 1:0:0:0: [sdb] Attached SCSI removable disk</pre>

This procedure is the same for both ORCA SOM and MITO 8M Mini==== Usage in device mode with [https://www. kernel.org/doc/Documentation/usb/mass-storage.txt mass-storage] ====

<pre class="workstation-terminal">root@desk-mx8mp:~# dd if=/dev/zero of=mass_storage count=Linux messages at boot time===256 bs=1M256+0 records in 256+0 records out 268435456 bytes (268 MB, 256 MiB) copied, 0.987911 s, 272 MB/sroot@desk-mx8mp:~# mkfs.msdos mass_storage mkfs.fat 4.2 (2021-01-31)root@desk-mx8mp:~# mkdir looproot@desk-mx8mp:~# mount -o loop mass_storage loop[ 6664.248804] loop0: detected capacity change from 0 to 524288root@desk-mx8mp:~# echo "Test USB OTG with mass storage device" > loop/usb.txtroot@desk-mx8mp:~# umount looproot@desk-mx8mp:~# </pre>

When a USB peripheral is inserted, in then insert the following example <code>g_mass_storage</code> kernel module driver enabling an Windows PC to see it as a memory mass storage device, the kernel recognizes the ''removable device (i.e. class, vendor id, product id, etc.)''

root@desk-mx8mp:~# [ 2406.464399] usb 6-1: USB disconnect, device number 2modprobe g_mass_storage removable=y file=mass_storage[ 24076677.644440844877] usb 2-1.3: new SuperSpeed Gen 1 USB device number 3 using xhci-hcd[ 2407.670023] usb-storage 2-1.3:1.0: USB Mass Storage device detected[ 2407.677192] scsi host0Function, version: usb-storage 2-1.3:1.02009/09/11[ 24086677.691090850190] scsi 0LUN:0:0:0: Direct-Access HYPER FLASHDISK 1507 PQ: 0 ANSI: 0[ 2408.701469] sd 0:0:0:0: [sda] 129630208 512-byte logical blocksremovable file: (66.4 GB/61.8 GiBno medium)[ 24086677.709458854585] sd 0LUN:0removable file:0:0: [sda] Write Protect is off/home/root/mass_storage[ 24086677.714509859933] sd 0:0:0:0: [sda] No Caching mode page foundNumber of LUNs=1[ 24086677.719856863239] sd 0g_mass_storage gadget:0Mass Storage Gadget, version:0:0: [sda] Assuming drive cache: write through2009/09/11[ 24086677.743246870221] sdag_mass_storage gadget: sda1userspace failed to provide iSerialNumber[ 24086677.747220877281] sd 0:0:0g_mass_storage gadget:0: [sda] Attached SCSI removable diskg_mass_storage ready

Once the USB cable is connected to the PC, the kernel prints the following messages: <pre class="workstation-terminal">root@desk-mx8mp:~# [ 1493.477167] g_mass_storage gadget: high-speed config #1: Linux File-Backed Storage</pre> and the Windows PC activate the driver and the disk is available as a Drive Unit (with the ''usb.txt'' file available). ===Accessing the peripheral MITO 8M Mini=== ====Linux messages==== When a USB 2.0 peripheral is inserted, in the following example a memory mass storage device, the kernel recognizes the device (i.e. class, vendor id, product id, etc.) <pre class="workstation-terminal">root@desk-mx8mm:~# [ 22.858909] usb 1-1: new high-speed USB device number 2 using ci_hdrc[ 23.022240] usb-storage 1-1:1.0: USB Mass Storage device detected[ 23.028819] scsi host0: usb-storage 1-1:1.0[ 24.045317] scsi 0:0:0:0: Direct-Access SanDisk Cruzer Force 1.00 PQ: 0 ANSI: 6[ 24.055280] sd 0:0:0:0: [sda] 60088320 512-byte logical blocks: (30.8 GB/28.7 GiB)[ 24.063993] sd 0:0:0:0: [sda] Write Protect is off[ 24.069617] sd 0:0:0:0: [sda] Write cache: disabled, read cache: enabled, doesn't support DPO or FUA[ 24.142194] sda: sda1[ 24.150358] sd 0:0:0:0: [sda] Attached SCSI removable disk</pre> === Additional information in host mode === 

[[Category:ORCA]] [[Category:MITO 8M Mini]]