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 "cpqfcTStrigger.h"
   7 #if TRIGGERABLE_HBA
   8
   9 #include <linux/kernel.h>
  10 #include <linux/ioport.h>
  11 #include <linux/types.h>
  12 #include <linux/pci.h>
  13 #include <asm/io.h>
  14
  15 void TriggerHBA( void* IOBaseUpper, int Print)
  16 {
  17   __u32 long value;
  18
  19   // get initial value in hopes of not modifying any other GPIO line
  20   IOBaseUpper += 0x188;  // TachTL/TS Control reg
  21
  22   value = readl( IOBaseUpper);
  23   // set HIGH to trigger external analyzer (tested on Dolche Finisar 1Gb GTA)
  24   // The Finisar anaylzer triggers on low-to-high TTL transition
  25   value |= 0x01; // set bit 0
  26
  27   writel( value, IOBaseUpper);
  28
  29   if( Print)
  30     printk( " -GPIO0 set- ");
  31 }
  32
  33 #endif