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
