arch/ppc64/kernel/iSeries_pci_reset.c

   1 #define PCIFR(...)
   2 /************************************************************************/
   3 /* File iSeries_pci_reset.c created by Allan Trautman on Mar 21 2001.   */
   4 /************************************************************************/
   5 /* This code supports the pci interface on the IBM iSeries systems.     */
   6 /* Copyright (C) 20yy  <Allan H Trautman> <IBM Corp>                    */
   7 /*                                                                      */
   8 /* This program is free software; you can redistribute it and/or modify */
   9 /* it under the terms of the GNU General Public License as published by */
  10 /* the Free Software Foundation; either version 2 of the License, or    */
  11 /* (at your option) any later version.                                  */
  12 /*                                                                      */
  13 /* This program is distributed in the hope that it will be useful,      */
  14 /* but WITHOUT ANY WARRANTY; without even the implied warranty of       */
  15 /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the        */
  16 /* GNU General Public License for more details.                         */
  17 /*                                                                      */
  18 /* You should have received a copy of the GNU General Public License    */
  19 /* along with this program; if not, write to the:                       */
  20 /* Free Software Foundation, Inc.,                                      */
  21 /* 59 Temple Place, Suite 330,                                          */
  22 /* Boston, MA  02111-1307  USA                                          */
  23 /************************************************************************/
  24 /* Change Activity:                                                     */
  25 /*   Created, March 20, 2001                                            */
  26 /*   April 30, 2001, Added return codes on functions.                   */
  27 /*   September 10, 2001, Ported to ppc64.                               */
  28 /* End Change Activity                                                  */
  29 /************************************************************************/
  30 #include <linux/kernel.h>
  31 #include <linux/init.h>
  32 #include <linux/module.h>
  33 #include <linux/pci.h>
  34 #include <linux/irq.h>
  35 #include <linux/delay.h>
  36
  37 #include <asm/io.h>
  38 #include <asm/iSeries/HvCallPci.h>
  39 #include <asm/iSeries/HvTypes.h>
  40 #include <asm/iSeries/mf.h>
  41 #include <asm/pci.h>
  42
  43 #include <asm/iSeries/iSeries_pci.h>
  44 #include "pci.h"
  45
  46 /*
  47  * Interface to toggle the reset line
  48  * Time is in .1 seconds, need for seconds.
  49  */
  50 int iSeries_Device_ToggleReset(struct pci_dev *PciDev, int AssertTime,
  51                 int DelayTime)
  52 {
  53         unsigned int AssertDelay, WaitDelay;
  54         struct iSeries_Device_Node *DeviceNode =
  55                 (struct iSeries_Device_Node *)PciDev->sysdata;
  56
  57         if (DeviceNode == NULL) {
  58                 printk("PCI: Pci Reset Failed, Device Node not found for pci_dev %p\n",
  59                                 PciDev);
  60                 return -1;
  61         }
  62         /*
  63          * Set defaults, Assert is .5 second, Wait is 3 seconds.
  64          */
  65         if (AssertTime == 0)
  66                 AssertDelay = 500;
  67         else
  68                 AssertDelay = AssertTime * 100;
  69
  70         if (DelayTime == 0)
  71                 WaitDelay = 3000;
  72         else
  73                 WaitDelay = DelayTime * 100;
  74
  75         /*
  76          * Assert reset
  77          */
  78         DeviceNode->ReturnCode = HvCallPci_setSlotReset(ISERIES_BUS(DeviceNode),
  79                         0x00, DeviceNode->AgentId, 1);
  80         if (DeviceNode->ReturnCode == 0) {
  81                 msleep(AssertDelay);                    /* Sleep for the time */
  82                 DeviceNode->ReturnCode =
  83                         HvCallPci_setSlotReset(ISERIES_BUS(DeviceNode),
  84                                         0x00, DeviceNode->AgentId, 0);
  85
  86                 /*
  87                  * Wait for device to reset
  88                  */
  89                 msleep(WaitDelay);
  90         }
  91         if (DeviceNode->ReturnCode == 0)
  92                 PCIFR("Slot 0x%04X.%02 Reset\n", ISERIES_BUS(DeviceNode),
  93                                 DeviceNode->AgentId);
  94         else {
  95                 printk("PCI: Slot 0x%04X.%02X Reset Failed, RCode: %04X\n",
  96                                 ISERIES_BUS(DeviceNode), DeviceNode->AgentId,
  97                                 DeviceNode->ReturnCode);
  98                 PCIFR("Slot 0x%04X.%02X Reset Failed, RCode: %04X\n",
  99                                 ISERIES_BUS(DeviceNode), DeviceNode->AgentId,
 100                                 DeviceNode->ReturnCode);
 101         }
 102         return DeviceNode->ReturnCode;
 103 }
 104 EXPORT_SYMBOL(iSeries_Device_ToggleReset);