[U-Boot] getting usb working

[Frank Wunderlich]

it seems that "Enable driver model for USB" (DM_USB) is needed for this...after enabling this i can build it, but uboot hangs after autoboot-message

CPU:   MediaTek MT7623 E3                                                       
DRAM:  2 GiB                                                                    
MMC:   Loading Environment from MMC... board/mediatek/mt7623/mt7623_rfb.c:39 mmv
Boot From SD(id:1)                                                              
                                                                                
*** Warning - No MMC card found, using default environment
                      
In:    serial                                                                   
Out:   serial                                                                   
Err:   serial                                                                   
Net:   Net Initialization Skipped                                               
No ethernet found.                                                              
Hit any key to stop autoboot:  0                                                

any thoughts?

after disabling usb (cli+driver), my env can be read from MMC (i had not selected usb-env) and bootcmd works as expected. seems initialization of usb breaks mmc-initialization and bootup

CPU:   MediaTek MT7623 E3                                                       
DRAM:  2 GiB                                                                    
MMC:   mmc at 11230000: 0, mmc at 11240000: 1                                         
Loading Environment from MMC... board/mediatek/mt7623/mt7623_rfb.c:39 mmc_get_ev
Boot From SD(id:1)                                                              
                                                                                
OK                                                                              
In:    serial                                                                   
Out:   serial                                                                   
Err:   serial                                                                   
Net:   Net Initialization Skipped                                               
No ethernet found.                                                              
Hit any key to stop autoboot:  0                                                
Interface:  MMC                                                                 
  Device 1: Vendor: Man 00001b Snr a42cb700 Rev: 7.8 Prod: 00000               
            Type: Removable Hard Disk                                           
            Capacity: 7788.0 MB = 7.6 GB (15949824 x 512)                       
Filesystem: FAT16 "BPI-BOOT   "                                                 
Boot from SD                                                                    
960 bytes read in 6 ms (156.3 KiB/s)

i guess the hang results in mmc-init (which seems to fail) and my bootcmd-chain

U-Boot> printenv bootcmd
bootcmd=setenv bootdelay 3; run reloadmenu;
U-Boot> printenv reloadmenu
reloadmenu=run selectmmc;if run checkenv; then run loadbootenv; else echo file not found; fi;bootmenu;
U-Boot> printenv selectmmc 
selectmmc=if run checksd; then echo Boot from SD ; setenv partition 1:1;else echo Boot from eMMC; setenv partition 0:1 ; fi;
U-Boot> printenv checksd  
checksd=fatinfo ${device} 1:1
U-Boot> printenv checkenv 
checkenv=test -e ${device} ${partition} ${bpi}/${board}/${service}/${bootenv}

why does usb influence mmc-init? what else is needed to get USB working (DTS-nodes,driver,..)?

regards Frank