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