Hi , i am testing the ehci-hcd river for ARC HS OTG controller. I have the following observations when i try connecting devices.
After the probe, the POTRSCx values are 0x8c001000 for ARC controller whcih is EHCI complaint. COMMAND: 0x80b01 MODE: 0x7 STATUS: 0x88 INTERRUPT: 0x37 SET INTR ARE (INTR_MASK): 0x37 PORT 0 STATUS: 0x8c001000 SEGMENT = 0x0 FRAME LIST = 0x63ff4000 ASYNC LIST = 0x63ff2000 TTCTRL = 0x0 CONFIGURE FLAG = 0x1 OTGSC = 0x313120 PORT STATUS CONTROL REGISTERS PORTSC[0] = 0x8c001000 1) When a OTG hard disk(Self Powered) was connected, there was no interrupt and my ehci_irq interrupt handler was not invoked. When i power on the device i get a DISCONNECT event from the device and the PORTSCx value changes to 0x8c001002 (CCS = 0,CSC =1) and "IRQ IS GENERATED" . STATUS register shows Port Change Detect Interrupt (STS = 0x8C). So when the hub_events() tries to do a GetPortStatus, it does not find connection(CCS =0) and the hub_port_connect_change() function returns. Also PORT-ENABLE bit in PORTSCx is not 1. That means that even though a device was connected, the port is not enabled. 2) When a USB2.0 HS speed device(thumb drive or Camera) was connected to the board, there is no interrupt genearated. This is visible from cat /proc/interrupts. How can interpret the above 2 observations. I am getting PCD interrupts for disconnect event from a device(OTG) ," after that was connected and powered on. " For other devices i am not getting interrupt. Please help me debug this problem. The probe function before returning dumps the following register values DUMP of " /sys/class/usb_host/usb_host/register" after the OTG device was connected and powered on. bus platform, device ab301_ehci_usb.0 (driver 10 Dec 2004) EHCI Host Controller EHCI 1.00, hcd state 1 structural params 0x00010011 capability params 0x00000006 status 0088 FLR command 080b01 park=3 ithresh=8 period=1024 RUN intrenable 37 IAA FATAL PCD ERR INT uframe 22e0 port 1 status 8c001000 POWER sig=se0 irq normal 0 err 0 reclaim 0 (lost 0) complete 0 unlink 0 Thanks Rak _______________________________________________ linux-usb-devel@lists.sourceforge.net To unsubscribe, use the last form field at: https://lists.sourceforge.net/lists/listinfo/linux-usb-devel
