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DESK-MX8M-L/Peripherals/USB2 OTG

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!colspan="4" style="width:100%; text-align:left"; border-bottom:solid 2px #ededed"|History
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<section end=History/>
<section begin=Body/>
==Peripheral USB Host USB2 OTG ==
=== Device tree configuration ===
==== ORCA SOM ====
 
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.
Here below an example of device tree configuration used on standard DAVE's kit for the ORCA SOM:
<pre>
...
...
&usb3_phy1 {
fsl,phy-tx-preemp-amp-tune = <2>;
status = "okay";
};
......
</pre>
Here below an example of device tree configuration used on standard DAVE's kit for the MITO 8M Mini:
From <code>imx8mm-mito8mmini.dtsdtsi</code>:
<pre>
&usbotg2 {
dr_mode = "host";
picophy,pre-emp-curr-control = <3>;
picophy,dc-vol-level-adjust = <7>;
status = "disabled";
};
...
...
</pre>
 
From <code>imx8mm-mito8mmini-sbcx.dts</code>:
 
<pre>
...
...
/ {
 
regulators: regulators {
compatible = "simple-bus";
#address-cells = <1>;
#size-cells = <0>;
 
reg_usb_pwr: usb_pwr {
compatible = "regulator-fixed";
regulator-name = "usb_pwr_en";
regulator-min-microvolt = <5000000>;
regulator-max-microvolt = <5000000>;
gpio = <&gpio1 12 GPIO_ACTIVE_HIGH>;
enable-active-high;
};
...
...
};
};
...
...
&usbotg2 {
pinctrl-names = "default";
pinctrl-0 = <&pinctrl_usb_pwr>;
vbus-supply = <&reg_usb_pwr>;
picophy,pre-emp-curr-control = <3>;
picophy,dc-vol-level-adjust = <7>;
status = "okay";
};
...
};
</pre>
...
...
</pre>
<pre class="workstation-terminal">
root@desk-mx8mp:~# [ 949.406404] [ 6491.481175] usb 3-1: new high-speed USB device number 3 using xhci-hcd[ 9496491.559777639810] usb-storage 3-1:1.0: USB Mass Storage device detected [ 9496491.566805646905] scsi host0: usb-storage 3-1:1.0 [ 9506493.603883775259] scsi 0:0:0:0: Direct-Access SanDisk Cruzer Force 1.00 Fanxiang F206 1100 PQ: 0 ANSI: 64[ 9506493.613554786654] sd 0:0:0:0: [sda] 60088320 61440000 512-byte logical blocks: (3031.8 5 GB/2829.7 3 GiB) [ 9506493.621925795475] sd 0:0:0:0: [sda] Write Protect is off [ 9506493.627095801799] sd 0:0:0:0: [sda] Write cache: disabledenabled, read cache: enabled, doesn't support DPO or FUA[ 9506493.688387818546] sda: sda1 [ 9506493.695304824653] sd 0:0:0:0: [sda] Attached SCSI removable disk
root@desk-mx8mp:~#
</pre>
<pre class="workstation-terminal">
root@desk-mx8mp:~# [ 10266798.205678669673] usb 4-1: new SuperSpeed Gen 1 USB device number 2 3 using xhci-hcd[ 10266798.231220703673] usb-storage 4-1:1.0: USB Mass Storage device detected[ 10266798.237848710479] scsi host0host1: usb-storage 4-1:1.0[ 10276799.275191719808] scsi 01:0:0:0: Direct-Access HYPER FLASHDISK 1507 Wilk USB DISK 3.0 PMAP PQ: 0 ANSI: 06[ 10276799.284305732902] sd 01:0:0:0: [sdasdb] 129630208 60628992 512-byte logical blocks: (6631.4 0 GB/6128.8 9 GiB)[ 10276799.292341741747] sd 01:0:0:0: [sdasdb] Write Protect is off[ 10276799.297451747177] sd 01:0:0:0: [sdasdb] No Caching mode page found[ 1027.302780] sd 0:0Write cache:0:0: [sda] Assuming drive disabled, read cache: write throughenabled, doesn't support DPO or FUA[ 10276799.336127934800] sdasdb: sda1[ 10276799.340540940848] sd 01:0:0:0: [sdasdb] Attached SCSI removable disk
</pre>
<pre class="workstation-terminal">
root@desk-mx8mp:~# dd if=/dev/zero of=mass_storage count=256 bs=1M256+0 records in 256+0 records out 268435456 bytes (268 MB, 256 MiB) copied, 160.173 987911 s, 16.6 272 MB/sroot@desk-mx8mp:~# mkfs.msdos mass_storage mkfs.fat 4.1 2 (20172021-01-2431)
root@desk-mx8mp:~# mkdir loop
root@desk-mx8mp:~# mount -o loop mass_storage loop
[ 6664.248804] loop0: detected capacity change from 0 to 524288
root@desk-mx8mp:~# echo "Test USB OTG with mass storage device" > loop/usb.txt
root@desk-mx8mp:~# umount loop
<pre class="workstation-terminal">
root@desk-mx8mp:~# modprobe g_mass_storage removable=y file=mass_storage
[ 14926677.938536844877] Mass Storage Function, version: 2009/09/11[ 14926677.943718850190] LUN: removable file: (no medium)[ 14926677.948194854585] LUN: removable file: /home/root/mass_storage[ 14926677.953574859933] Number of LUNs=1[ 14926677.956850863239] g_mass_storage gadget: Mass Storage Gadget, version: 2009/09/11[ 14926677.963863870221] g_mass_storage gadget: userspace failed to provide iSerialNumber[ 14926677.970944877281] g_mass_storage gadget: g_mass_storage readyroot@desk-mx8mmmx8mp:~#
</pre>
</pre>
=== Additional information in host mode ===
=== Additional information in host mode ===
If the root file system configuration does not automatically mount the partition, it is possible to mount the device using the following command:
-rwxr-xr-x 1 root root 531 Nov 17 15:27 settings.txt
</pre>
 
<section end=Body/>
----
[[Category:ORCA]] [[Category:MITO 8M Mini]]
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