Initializing I2C on the RTEMS6 MVME3100 BSP

[Zainab Olalekan]

Hello everyone,


I am encountering difficulties with initializing I2C on the RTEMS6 MVME3100 BSP, required to run EPICS test. I have made adaptations based on Heinz's patch for RTEMS5, but I am experiencing an error. Here is the specific error message alongside an attached file showing the modifications made.

Welcome to rtems-6.0.0 (PowerPC/Generic (no FPU)/mvme3100)
BSP: mvme3100, CVS Release ($Name$)
CPU 0x8020 - rev 0x20
Additional boot options are
Initial system stack at 41cb0
Going to start PCI buses scanning and initialization
Board Type: MVME3100-1152 (S/N E1726C0)
External (=PCI Bus) Clock Freq   :   66666666 Hz
Core Complex Bus (CCB) Clock Freq:  333333330 Hz
CPU Clock Freq:                     133333332 Hz
Ethernet 0                  EC:9E:CD:19:B3:53
Ethernet 1                  EC:9E:CD:19:B3:54
Ethernet 2                  EC:9E:CD:19:B3:55
Number of PCI buses found is : 2
BUS:SLOT:FUN  VENDOR-DEV_ID: COMMAND STATUS BASE_ADDR0 BASE_ADDR1 IRQ_PIN -> IRQ_LINE
  0:0x00:0    0x1057-0x0008:  0x0006 0x20b0 0x80000000 0x00000000       0 ->   0 (=0x00)
  0:0x11:0    0x10e3-0x0148:  0x0146 0x02b0 0x80100004 0x00000000       1 ->   0 (=0x00)
  0:0x12:0    0x10b5-0x6520:  0x0147 0x02b0 0x00000000 0x00000000       0 ->   0 (=0x00)
  0:0x14:0    0x1095-0x3124:  0x01c7 0x02b0 0x80300004 0x00000000       1 ->   2 (=0x02)
Memory:                             268435456 bytes
Cleared PCI errors: pci_stat was 0x20b0
OpenPIC Version 1.2 (1 CPUs and 56 IRQ sources) at 0x3775135744
OpenPIC Vendor 0 (Unknown), Device 0 (Unknown), Stepping 0
OpenPIC timer frequency is not set
MSR is 0x00001000, TCR 0x04000000
-----------------------------------------
Exit from bspstart
Tundra Tsi148 PCI-VME bridge detected at 0x80100000, IRQ 0
Tsi148 Outbound Ports:
Port  VME-Addr   Size       PCI-Adrs   Mode:
0:    0x20000000 0x0e000000 0xc0000000 A32, SUP, D32, SCT
1:    0x00000000 0x00ff0000 0xcf000000 A24, SUP, D32, SCT
2:    0x00000000 0x00010000 0xcfff0000 A16, SUP, D32, SCT
7:    0x00000000 0x01000000 0xce000000 CSR, SUP, D32, SCT
Tsi148 Inbound Ports:
Port  VME-Addr   Size       PCI-Adrs   Mode:
0:    0xc0000000 0x10000000 0x00000000 A32, PGM, DAT, SUP, USR, MBLT, BLT
vmeTsi148 IRQ manager: looking for registers on VME...
Trying to find CSR on VME...
vmeTsi148 - IRQ manager using VME CSR to flush FIFO
-------- call BSP_i2c_initialize() with _IO_All_drivers_initialized = true
assumes that major 0 is assigned to i2c ---------
now trying to i2c intialized
libi2c: Claiming driver slot failed (rtems status code 10)
Initializing I2C library failed
now i2c intialized 2


*** BEGIN OF TEST HELLO WORLD ***
*** TEST VERSION: 6.0.0.b2967081e5daa673141d714a2e53280898dce566
*** TEST STATE: EXPECTED_PASS
*** TEST BUILD: RTEMS_POSIX_API
*** TEST TOOLS: 12.2.1 20230425 (RTEMS 6, RSB 3c8c2ce38a8fe0a622f88fb3422d1f8fa609609b, Newlib 9ae9eef)
Hello World

*** END OF TEST HELLO WORLD ***

fatal source: RTEMS_FATAL_SOURCE_EXIT
exception vector 1 (0x1)
  next PC or address of fault = 0x902d8100
  saved MSR = 0x908d80f4
  context = task, ISR nest level = 0
  thread dispatch disable level = 0
  R0  = 0x9081003c R1  = 0x38800003 R2  = 0x48014e50 R3  = 0x9421ff50
  R4  = 0x9081003c R5  = 0x38800004 R6  = 0x48014e40 R7  = 0x902d8104
  R8  = 0x908d80f8 R9  = 0x38808005 R10 = 0x48014e2c R11 = 0x9421ff50
  R12 = 0x9081003c R13 = 0x38800006 R14 = 0x48014e20 R15 = 0x9421ff50
  R16 = 0x9081003c R17 = 0x38800007 R18 = 0x48014e10 R19 = 0x9421ff50
  R20 = 0x9081003c R21 = 0x38800008 R22 = 0x48014e00 R23 = 0x9421ff50
  R24 = 0x9081003c R25 = 0x3880000c R26 = 0x48014df0 R27 = 0x9421ff50
  R28 = 0x9081003c R29 = 0x38800018 R30 = 0x48014de0 R31 = 0x902d8104
  CR  = 0x9421ff50
  CTR = 0x38800002
  XER = 0x9081003c
  LR  = 0x48015578
 DEAR = 0x00000000
  ESR = 0x02000000
 MCSR = 0x00000000
  executing thread ID = 0x0a010001, name = UI1



Best Regards,
Zainab Olalekan
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