drivers/scsi/cpqfcTStrigger.c

   1 // Routine to trigger Finisar GTA analyzer. Runs of GPIO2
   2 // NOTE: DEBUG ONLY! Could interfere with FCMNGR/Miniport operation
   3 // since it writes directly to the Tachyon board.  This function
   4 // developed for Compaq HBA Tachyon TS v1.2 (Rev X5 PCB)
   5
   6 #include <linux/kernel.h>
   7 #include <linux/ioport.h>
   8 #include <linux/types.h>
   9 #include <linux/pci.h>
  10 #include <asm/io.h>
  11
  12
  13 void TriggerHBA( void* IOBaseUpper, int Print)
  14 {
  15   __u32 long value;
  16
  17   // get initial value in hopes of not modifying any other GPIO line
  18   IOBaseUpper += 0x188;  // TachTL/TS Control reg
  19
  20   value = readl( IOBaseUpper);
  21   // set HIGH to trigger external analyzer (tested on Dolche Finisar 1Gb GTA)
  22   // The Finisar anaylzer triggers on low-to-high TTL transition
  23   value |= 0x01; // set bit 0
  24
  25   writel( value, IOBaseUpper);
  26
  27   if( Print)
  28     printk( " -GPIO0 set- ");
  29 }
  30