It seems that GE does some extra FPGA trickery for VME. Could it be that you need vmivme7805 driver? > On 01 Aug 2015, at 01:28, Eisch, Jonathan D [PHYSA] <jeisch@xxxxxxxxxxx> wrote: > > Hello DriverDev, > > I recently installed the latest Debian with Kernel 3.16 including all the vme drivers (and vme_user in staging) on a GE VME7807RC. Using Martyn Welch’s example from 12 March 2013 on this list as a guide, I tried reading out 32 bytes from one of my boards, but I just got a bunch of 0xFF bytes. > > I monitored the bus with a diagnostics board, and didn’t see any activity at all (no addresses, no data) from power-up through booting and trying to read from the bus. Attempting the same reads with another VME7807 using the GE provided driver lit up the same diagnostics board like a christmas tree (well, the lower 16 bits). > > I hope I’m missing something basic, as I don’t see any error messages anywhere to guide my way. > > Thanks for your help, > -Jonathan > > $ sudo modprobe vme_ca91cx42 > $ sudo modprobe vme_user bus=0 > $ dmesg | grep vme > [ 632.942457] vme_ca91cx42 0000:01:0d.0: found PCI INT A -> IRQ 14 > [ 632.942523] vme_ca91cx42 0000:01:0d.0: Board is the VME system controller > [ 632.942526] vme_ca91cx42 0000:01:0d.0: Slot ID is 0 > [ 632.942529] vme_ca91cx42 0000:01:0d.0: CR/CSR Offset: 0 > [ 632.942533] vme_ca91cx42 0000:01:0d.0: Slot number is unset, not configuring CR/CSR space > [ 632.942537] vme_ca91cx42 0000:01:0d.0: CR/CSR configuration failed. > [ 640.990642] vme_user: module is from the staging directory, the quality is unknown, you have been warned. > [ 640.991404] vme_user: VME User Space Access Driver > $ sudo ./vmetest > Simple VME User Module Test > WARNING: Only read 32 bytes > 0000: ff ff ff ff ff ff ff ff > 0008: ff ff ff ff ff ff ff ff > 0010: ff ff ff ff ff ff ff ff > 0018: ff ff ff ff ff ff ff ff > > $ cat main.c > /* > * main.c > * > * Created on: Jul 29, 2015 > * > * Copied from: http://driverdev.linuxdriverproject.org/pipermail/driverdev-devel/2013-April/037460.html > * > */ > > #define _XOPEN_SOURCE 500 > #include <stdio.h> > #include <stdlib.h> > #include <sys/ioctl.h> > #include <sys/types.h> > #include <sys/stat.h> > #include <fcntl.h> > #include <unistd.h> > #include "vme_user.h" > int main(int argc, char *argv[]) > { > int fd; > int i; > int retval; > unsigned char data[512]; > > struct vme_master master; > > printf("Simple VME User Module Test\n"); > > fd = open("/dev/bus/vme/m0", O_RDONLY); > if (fd == -1) { > perror("ERROR: Opening window device file"); > return 1; > } > // master.enable = 1; > // master.vme_addr = 2*0x8000000; > // master.size = 0x100000; > // master.aspace = 0x4; // VME_A32 > // master.cycle = 0x2000 | 0x8000; // Unprivileged data access > // master.dwidth = 0x4; // 32 bit word access > master.enable = 1; > master.vme_addr = 0xE000; > master.size = 0x1000; > master.aspace = 0x1; // VME_A16 > master.cycle = 0x2000; // Unprivileged data access > master.dwidth = 0x2; // 16 bit word access > > retval = ioctl(fd, VME_SET_MASTER, &master); > if (retval != 0) { > printf("retval=%d\n", retval); > perror("ERROR: Failed to configure window"); > return 1; > } > > /* > * Reading first 32 bytes > */ > for (i=0; i<32; i++) { > data[i] = 0; > } > > retval = pread(fd, data, 32, 0); > if (retval < 512) { > printf("WARNING: Only read %d bytes", retval); > } > > for(i=0; i<retval; i++) { > if (i % 8 == 0) { > printf("\n""%4.4x: ", i); > } > printf("%2.2x ", data[i]); > } > printf("\n"); > > close(fd); > > return 0; > } > > > ---- > Jonathan Eisch > Research Associate > Physics & Astronomy > Iowa State University > _______________________________________________ > devel mailing list > devel@xxxxxxxxxxxxxxxxxxxxxx > http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
