Hi, everyone.
I have a board using DM3730 and runs PSP4.2.0.7.
I compiled g_ether and g_file_storage as modules and switch them on demand.
This works fine if after the board boots the device is connected to a host computer as g_ether and is switched to g_file_storage.
The g_file_storage driver won't respond to host if the switch happens between power up and the first sleep.
(1. power up, connect with g_ether loaded, switch to g_file_storage, then both g_file_storage and g_ether works perfectly from then on.
2. power up, connect with g_ether loaded, sleep, wake up, then g_file_storage won't respond to host from then on, but g_ether is normal.)
Running SRP does not help.
What could possibly cause this behavior?
Host side dmesg:
[568864.653239] usb 3-1: new full-speed USB device number 31 using xhci_hcd [568864.669595] usb 3-1: not running at top speed; connect to a high speed hub [568864.670631] usb 3-1: New USB device found, idVendor=0525, idProduct=a4a2 [568864.670633] usb 3-1: New USB device strings: Mfr=1, Product=2, SerialNumber=0 [568864.670634] usb 3-1: Product: RNDIS/Ethernet Gadget [568864.670635] usb 3-1: Manufacturer: Linux 2.6.37 with musb-hdrc [568864.680131] cdc_ether 3-1:1.0 usb0: register 'cdc_ether' at usb-0000:00:14.0-1, CDC Ethernet Device, 2e:57:ae:1b:94:80 [568865.396392] usb 3-1: USB disconnect, device number 31 [568865.396520] cdc_ether 3-1:1.0 usb0: unregister 'cdc_ether' usb-0000:00:14.0-1, CDC Ethernet Device [568866.285943] usb 3-1: new full-speed USB device number 32 using xhci_hcd [568866.302254] usb 3-1: not running at top speed; connect to a high speed hub [568866.302961] usb 3-1: New USB device found, idVendor=0525, idProduct=a4a5 [568866.302965] usb 3-1: New USB device strings: Mfr=1, Product=2, SerialNumber=3 [568866.302968] usb 3-1: Product: File-backed Storage Gadget [568866.302970] usb 3-1: Manufacturer: Linux 2.6.37 with musb-hdrc [568866.302972] usb 3-1: SerialNumber: 123456789ABC [568866.309462] usb-storage 3-1:1.0: USB Mass Storage device detected [568866.309515] usb-storage 3-1:1.0: Quirks match for vid 0525 pid a4a5: 10000 [568866.309552] scsi251 : usb-storage 3-1:1.0 [568888.703540] usb 3-1: reset full-speed USB device number 32 using xhci_hcd [568888.720064] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep c068b32c [568888.720067] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep c068b300 [568888.839596] usb 3-1: reset full-speed USB device number 32 using xhci_hcd [568888.855960] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep c068b32c [568888.855963] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep c068b300 [568894.982033] usb 3-1: reset full-speed USB device number 32 using xhci_hcd [568894.998817] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep c068b32c [568894.998821] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep c068b300 [568895.170163] usb 3-1: reset full-speed USB device number 32 using xhci_hcd [568895.186583] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep c068b32c [568895.186586] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep c068b300 [568895.306203] usb 3-1: reset full-speed USB device number 32 using xhci_hcd [568895.322701] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep c068b32c [568895.322705] xhci_hcd 0000:00:14.0: xHCI xhci_drop_endpoint called with disabled ep c068b300 [568895.329092] scsi 251:0:0:0: Device offlined - not ready after error recovery
Device side dmesg:
[ 95.351043] g_ether gadget: full speed config #1: CDC Ethernet (ECM) [ 95.357757] musb-hdrc periph: enabled ep2in for int IN, dma, maxpacket 16 [ 95.358551] musb-hdrc periph: enabled ep1in for bulk IN, dma, maxpacket 64 [ 95.358612] musb-hdrc periph: enabled ep1out for bulk OUT, dma, maxpacket 64 [ 95.662475] devctl=0x99 [ 96.639892] g_file_storage gadget: File-backed Storage Gadget, version: 1 September 2010 [ 96.648529] g_file_storage gadget: Number of LUNs=3 [ 96.653686] g_file_storage gadget-lun0: ro=1, nofua=0, file: /dev/mmcblk0p2 [ 96.661041] g_file_storage gadget-lun1: ro=1, nofua=0, file: /dev/mmcblk0p4 [ 96.668395] g_file_storage gadget-lun2: ro=0, nofua=0, file: /dev/mmcblk0p3 [ 96.675781] musb g_file_storage gadget disconnected. [ 96.796417] platform iva.0: omap_voltage_scale: Already at the requestedrate 520000000 [ 96.804809] platform mpu.0: omap_voltage_scale: Already at the requestedrate 600000000 [ 96.982238] musb-hdrc periph: enabled ep1in for bulk IN, dma, maxpacket 64 [ 96.982299] musb-hdrc periph: enabled ep1out for bulk OUT, dma, maxpacket 64 [ 96.982330] g_file_storage gadget: full speed config #1 [ 119.389862] musb-hdrc periph: enabled ep1in for bulk IN, dma, maxpacket 64 [ 119.389953] musb-hdrc periph: enabled ep1out for bulk OUT, dma, maxpacket 64 [ 119.390136] g_file_storage gadget: full speed config #1 [ 119.525756] musb-hdrc periph: enabled ep1in for bulk IN, dma, maxpacket 64 [ 119.525848] musb-hdrc periph: enabled ep1out for bulk OUT, dma, maxpacket 64 [ 119.525909] g_file_storage gadget: full speed config #1
