Hello, when I boot 4.4.0-rc7+ kernel compiled with g_nokia into zImage on Nokia N900 into userspace then usb gadget (g_nokia) does not work. Notebook, connected on other side does not see any usb device... Connecting and disconnecting cable does not change anything, still not work. But if I run this command $ echo peripheral > /sys/bus/platform/devices/musb-hdrc.0.auto/mode then gadget starts working. Other side see usb device and can use it. Also connecting and disconnecting usb cable working fine. After connecting it again, usb device OK. So it looks like musb is in some wrong state after boot if above command is not called. Any idea where is problem? In attachment is output from more musb sysfs entries (before and after calling that command) which I think could be useful. If you want to see more logs, let me know what. Note that host mode on Nokia N900 does not work because of HW design. For 2.6.28 Nokia's kernel there are special and ugly (!) patches which enable host mode together with userspace interaction. So it does not make sense to have other than peripheral mode enabled by default on Nokia N900... -- Pali Rohár pali.rohar@xxxxxxxxx
Nokia-N900:~# grep "" /sys/bus/platform/devices/musb-hdrc.0.auto/* /sys/bus/platform/devices/musb-hdrc.0.auto/driver_override:(null) /sys/bus/platform/devices/musb-hdrc.0.auto/modalias:platform:musb-hdrc /sys/bus/platform/devices/musb-hdrc.0.auto/mode:b_idle /sys/bus/platform/devices/musb-hdrc.0.auto/uevent:DRIVER=musb-hdrc /sys/bus/platform/devices/musb-hdrc.0.auto/uevent:MODALIAS=platform:musb-hdrc /sys/bus/platform/devices/musb-hdrc.0.auto/vbus:Vbus on, timeout 1100 msec Nokia-N900:~# grep "" /sys/bus/platform/devices/musb-hdrc.0.auto/musb-hdrc.0.auto/* /sys/bus/platform/devices/musb-hdrc.0.auto/musb-hdrc.0.auto/a_alt_hnp_support:0 /sys/bus/platform/devices/musb-hdrc.0.auto/musb-hdrc.0.auto/a_hnp_support:0 /sys/bus/platform/devices/musb-hdrc.0.auto/musb-hdrc.0.auto/b_hnp_enable:0 /sys/bus/platform/devices/musb-hdrc.0.auto/musb-hdrc.0.auto/current_speed:UNKNOWN /sys/bus/platform/devices/musb-hdrc.0.auto/musb-hdrc.0.auto/is_a_peripheral:0 /sys/bus/platform/devices/musb-hdrc.0.auto/musb-hdrc.0.auto/is_otg:1 /sys/bus/platform/devices/musb-hdrc.0.auto/musb-hdrc.0.auto/is_selfpowered:0 /sys/bus/platform/devices/musb-hdrc.0.auto/musb-hdrc.0.auto/maximum_speed:high-speed grep: /sys/bus/platform/devices/musb-hdrc.0.auto/musb-hdrc.0.auto/soft_connect: Permission denied grep: /sys/bus/platform/devices/musb-hdrc.0.auto/musb-hdrc.0.auto/srp: Permission denied /sys/bus/platform/devices/musb-hdrc.0.auto/musb-hdrc.0.auto/state:not attached Nokia-N900:~# cat /sys/kernel/debug/musb-hdrc.0.auto/regdump MUSB (M)HDRC Register Dump FAddr : 00 Power : a0 Frame : 0000 Index : 00 Testmode : 00 TxMaxPp : a000 TxCSRp : 0000 RxMaxPp : 0000 RxCSR : ffff RxCount : fffe IntrRxE : fffe IntrTxE : ffff IntrUsbE : f7 DevCtl : 98 VControl : 00000000 HWVers : 0000 LinkInfo : 5c VPLen : 3c HS_EOF1 : 80 FS_EOF1 : 77 LS_EOF1 : 72 SOFT_RST : 00 DMA_CNTLch0 : 0000 DMA_ADDRch0 : 00000000 DMA_COUNTch0: 00000000 DMA_CNTLch1 : 0000 DMA_ADDRch1 : 00000000 DMA_COUNTch1: 00000000 DMA_CNTLch2 : 0000 DMA_ADDRch2 : 00000000 DMA_COUNTch2: 00000000 DMA_CNTLch3 : 0000 DMA_ADDRch3 : 00000000 DMA_COUNTch3: 00000000 DMA_CNTLch4 : 0000 DMA_ADDRch4 : 00000000 DMA_COUNTch4: 00000000 DMA_CNTLch5 : 0000 DMA_ADDRch5 : 00000000 DMA_COUNTch5: 00000000 DMA_CNTLch6 : 0000 DMA_ADDRch6 : 00000000 DMA_COUNTch6: 00000000 DMA_CNTLch7 : 0000 DMA_ADDRch7 : 00000000 DMA_COUNTch7: 00000000 ConfigData : 00 BabbleCtl : 00 TxFIFOsz : 00 RxFIFOsz : 00 TxFIFOadd : 0000 RxFIFOadd : 0000 EPInfo : ff RAMInfo : 8c Nokia-N900:~# cat /sys/kernel/debug/musb-hdrc.0.auto/softconnect -1 Nokia-N900:~# cat /sys/kernel/debug/musb-hdrc.0.auto/testmode Nokia-N900:~# Nokia-N900:~# Nokia-N900:~# echo peripheral > /sys/bus/platform/devices/musb-hdrc.0.auto/mode Nokia-N900:~# Nokia-N900:~# Nokia-N900:~# Nokia-N900:~# grep "" /sys/bus/platform/devices/musb-hdrc.0.auto/* /sys/bus/platform/devices/musb-hdrc.0.auto/driver_override:(null) /sys/bus/platform/devices/musb-hdrc.0.auto/modalias:platform:musb-hdrc /sys/bus/platform/devices/musb-hdrc.0.auto/mode:b_peripheral /sys/bus/platform/devices/musb-hdrc.0.auto/uevent:DRIVER=musb-hdrc /sys/bus/platform/devices/musb-hdrc.0.auto/uevent:MODALIAS=platform:musb-hdrc /sys/bus/platform/devices/musb-hdrc.0.auto/vbus:Vbus on, timeout 1100 msec Nokia-N900:~# grep "" /sys/bus/platform/devices/musb-hdrc.0.auto/musb-hdrc.0.auto/* /sys/bus/platform/devices/musb-hdrc.0.auto/musb-hdrc.0.auto/a_alt_hnp_support:0 /sys/bus/platform/devices/musb-hdrc.0.auto/musb-hdrc.0.auto/a_hnp_support:0 /sys/bus/platform/devices/musb-hdrc.0.auto/musb-hdrc.0.auto/b_hnp_enable:0 /sys/bus/platform/devices/musb-hdrc.0.auto/musb-hdrc.0.auto/current_speed:high-speed /sys/bus/platform/devices/musb-hdrc.0.auto/musb-hdrc.0.auto/is_a_peripheral:0 /sys/bus/platform/devices/musb-hdrc.0.auto/musb-hdrc.0.auto/is_otg:1 /sys/bus/platform/devices/musb-hdrc.0.auto/musb-hdrc.0.auto/is_selfpowered:0 /sys/bus/platform/devices/musb-hdrc.0.auto/musb-hdrc.0.auto/maximum_speed:high-speed grep: /sys/bus/platform/devices/musb-hdrc.0.auto/musb-hdrc.0.auto/soft_connect: Permission denied grep: /sys/bus/platform/devices/musb-hdrc.0.auto/musb-hdrc.0.auto/srp: Permission denied /sys/bus/platform/devices/musb-hdrc.0.auto/musb-hdrc.0.auto/state:configured Nokia-N900:~# cat /sys/kernel/debug/musb-hdrc.0.auto/regdump MUSB (M)HDRC Register Dump FAddr : 1f Power : f0 Frame : 02dd Index : 00 Testmode : 00 TxMaxPp : f01f TxCSRp : 0000 RxMaxPp : 0000 RxCSR : ffff RxCount : fffe IntrRxE : fffe IntrTxE : ffff IntrUsbE : f7 DevCtl : 99 VControl : 00000000 HWVers : 0000 LinkInfo : 5c VPLen : 3c HS_EOF1 : 80 FS_EOF1 : 77 LS_EOF1 : 72 SOFT_RST : 00 DMA_CNTLch0 : 0000 DMA_ADDRch0 : 00000000 DMA_COUNTch0: 00000000 DMA_CNTLch1 : 0000 DMA_ADDRch1 : 00000000 DMA_COUNTch1: 00000000 DMA_CNTLch2 : 0000 DMA_ADDRch2 : 00000000 DMA_COUNTch2: 00000000 DMA_CNTLch3 : 0000 DMA_ADDRch3 : 00000000 DMA_COUNTch3: 00000000 DMA_CNTLch4 : 0000 DMA_ADDRch4 : 00000000 DMA_COUNTch4: 00000000 DMA_CNTLch5 : 0000 DMA_ADDRch5 : 00000000 DMA_COUNTch5: 00000000 DMA_CNTLch6 : 0000 DMA_ADDRch6 : 00000000 DMA_COUNTch6: 00000000 DMA_CNTLch7 : 0000 DMA_ADDRch7 : 00000000 DMA_COUNTch7: 00000000 ConfigData : 00 BabbleCtl : 00 TxFIFOsz : 00 RxFIFOsz : 00 TxFIFOadd : 0000 RxFIFOadd : 0000 EPInfo : ff RAMInfo : 8c Nokia-N900:~# cat /sys/kernel/debug/musb-hdrc.0.auto/softconnect -1 Nokia-N900:~# cat /sys/kernel/debug/musb-hdrc.0.auto/testmode Nokia-N900:~#
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