iSeries_pci_reset.c
上传用户:jlfgdled
上传日期:2013-04-10
资源大小:33168k
文件大小:5k
源码类别:
Linux/Unix编程
开发平台:
Unix_Linux
- /************************************************************************/
- /* 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 %pn",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 Resetn",ISERIES_BUS(DeviceNode),DeviceNode->AgentId );
- }
- else {
- printk("PCI: Slot 0x%04X.%02X Reset Failed, RCode: %04Xn",ISERIES_BUS(DeviceNode),DeviceNode->AgentId,DeviceNode->ReturnCode);
- PCIFR( "Slot 0x%04X.%02X Reset Failed, RCode: %04Xn",ISERIES_BUS(DeviceNode),DeviceNode->AgentId,DeviceNode->ReturnCode);
- }
- return DeviceNode->ReturnCode;
- }