| /************************************************************************/ |
| /* File iSeries_pci_reset.c created by Allan Trautman on Mar 21 2001. */ |
| /************************************************************************/ |
| /* This code supports the pci interface on the IBM iSeries systems. */ |
| /* Copyright (C) 20yy <Allan H Trautman> <IBM Corp> */ |
| /* */ |
| /* This program is free software; you can redistribute it and/or modify */ |
| /* it under the terms of the GNU General Public License as published by */ |
| /* the Free Software Foundation; either version 2 of the License, or */ |
| /* (at your option) any later version. */ |
| /* */ |
| /* This program is distributed in the hope that it will be useful, */ |
| /* but WITHOUT ANY WARRANTY; without even the implied warranty of */ |
| /* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the */ |
| /* GNU General Public License for more details. */ |
| /* */ |
| /* You should have received a copy of the GNU General Public License */ |
| /* along with this program; if not, write to the: */ |
| /* Free Software Foundation, Inc., */ |
| /* 59 Temple Place, Suite 330, */ |
| /* Boston, MA 02111-1307 USA */ |
| /************************************************************************/ |
| /* Change Activity: */ |
| /* Created, March 20, 2001 */ |
| /* April 30, 2001, Added return codes on functions. */ |
| /* September 10, 2001, Ported to ppc64. */ |
| /* End Change Activity */ |
| /************************************************************************/ |
| #include <linux/kernel.h> |
| #include <linux/init.h> |
| #include <linux/pci.h> |
| #include <linux/irq.h> |
| |
| #include <asm/io.h> |
| #include <asm/init.h> |
| #include <asm/iSeries/HvCallPci.h> |
| #include <asm/iSeries/HvTypes.h> |
| #include <asm/iSeries/mf.h> |
| #include <asm/flight_recorder.h> |
| #include <asm/pci.h> |
| |
| #include <asm/iSeries/iSeries_pci.h> |
| #include "pci.h" |
| |
| /************************************************************************/ |
| /* Interface to toggle the reset line */ |
| /* Time is in .1 seconds, need for seconds. */ |
| /************************************************************************/ |
| int iSeries_Device_ToggleReset(struct pci_dev* PciDev, int AssertTime, int DelayTime) |
| { |
| unsigned long AssertDelay, WaitDelay; |
| struct iSeries_Device_Node* DeviceNode = (struct iSeries_Device_Node*)PciDev->sysdata; |
| if (DeviceNode == NULL) { |
| printk("PCI: Pci Reset Failed, Device Node not found for pci_dev %p\n",PciDev); |
| return -1; |
| } |
| /******************************************************************** |
| * Set defaults, Assert is .5 second, Wait is 3 seconds. |
| ********************************************************************/ |
| if (AssertTime == 0) AssertDelay = ( 5 * HZ)/10; |
| else AssertDelay = (AssertTime*HZ)/10; |
| if (WaitDelay == 0) WaitDelay = (30 * HZ)/10; |
| else WaitDelay = (DelayTime* HZ)/10; |
| |
| /******************************************************************** |
| * Assert reset |
| ********************************************************************/ |
| DeviceNode->ReturnCode = HvCallPci_setSlotReset(ISERIES_BUS(DeviceNode),0x00,DeviceNode->AgentId,1); |
| if (DeviceNode->ReturnCode == 0) { |
| set_current_state(TASK_UNINTERRUPTIBLE); |
| schedule_timeout(AssertDelay); /* Sleep for the time */ |
| DeviceNode->ReturnCode = HvCallPci_setSlotReset(ISERIES_BUS(DeviceNode),0x00,DeviceNode->AgentId, 0); |
| |
| /*************************************************************** |
| * Wait for device to reset |
| ***************************************************************/ |
| set_current_state(TASK_UNINTERRUPTIBLE); |
| schedule_timeout(WaitDelay); |
| } |
| if (DeviceNode->ReturnCode == 0) { |
| PCIFR("Slot 0x%04X.%02X Reset\n",ISERIES_BUS(DeviceNode),DeviceNode->AgentId ); |
| } |
| else { |
| printk("PCI: Slot 0x%04X.%02X Reset Failed, RCode: %04X\n",ISERIES_BUS(DeviceNode),DeviceNode->AgentId,DeviceNode->ReturnCode); |
| PCIFR( "Slot 0x%04X.%02X Reset Failed, RCode: %04X\n",ISERIES_BUS(DeviceNode),DeviceNode->AgentId,DeviceNode->ReturnCode); |
| } |
| return DeviceNode->ReturnCode; |
| } |