137 lines
3.6 KiB
C
137 lines
3.6 KiB
C
/*
|
|
* PCI Hot Plug Controller Driver for RPA-compliant PPC64 platform.
|
|
* Copyright (C) 2003 Linda Xie <lxie@us.ibm.com>
|
|
*
|
|
* All rights reserved.
|
|
*
|
|
* 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, GOOD TITLE or
|
|
* NON INFRINGEMENT. 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., 675 Mass Ave, Cambridge, MA 02139, USA.
|
|
*
|
|
* Send feedback to <lxie@us.ibm.com>
|
|
*
|
|
*/
|
|
#include <linux/pci.h>
|
|
#include <linux/string.h>
|
|
|
|
#include <asm/pci-bridge.h>
|
|
#include <asm/rtas.h>
|
|
#include <asm/machdep.h>
|
|
|
|
#include "../pci.h" /* for pci_add_new_bus */
|
|
#include "rpaphp.h"
|
|
|
|
int rpaphp_get_sensor_state(struct slot *slot, int *state)
|
|
{
|
|
int rc;
|
|
int setlevel;
|
|
|
|
rc = rtas_get_sensor(DR_ENTITY_SENSE, slot->index, state);
|
|
|
|
if (rc < 0) {
|
|
if (rc == -EFAULT || rc == -EEXIST) {
|
|
dbg("%s: slot must be power up to get sensor-state\n",
|
|
__func__);
|
|
|
|
/* some slots have to be powered up
|
|
* before get-sensor will succeed.
|
|
*/
|
|
rc = rtas_set_power_level(slot->power_domain, POWER_ON,
|
|
&setlevel);
|
|
if (rc < 0) {
|
|
dbg("%s: power on slot[%s] failed rc=%d.\n",
|
|
__func__, slot->name, rc);
|
|
} else {
|
|
rc = rtas_get_sensor(DR_ENTITY_SENSE,
|
|
slot->index, state);
|
|
}
|
|
} else if (rc == -ENODEV)
|
|
info("%s: slot is unusable\n", __func__);
|
|
else
|
|
err("%s failed to get sensor state\n", __func__);
|
|
}
|
|
return rc;
|
|
}
|
|
|
|
/**
|
|
* rpaphp_enable_slot - record slot state, config pci device
|
|
* @slot: target &slot
|
|
*
|
|
* Initialize values in the slot, and the hotplug_slot info
|
|
* structures to indicate if there is a pci card plugged into
|
|
* the slot. If the slot is not empty, run the pcibios routine
|
|
* to get pcibios stuff correctly set up.
|
|
*/
|
|
int rpaphp_enable_slot(struct slot *slot)
|
|
{
|
|
int rc, level, state;
|
|
struct pci_bus *bus;
|
|
struct hotplug_slot_info *info = slot->hotplug_slot->info;
|
|
|
|
info->adapter_status = NOT_VALID;
|
|
slot->state = EMPTY;
|
|
|
|
/* Find out if the power is turned on for the slot */
|
|
rc = rtas_get_power_level(slot->power_domain, &level);
|
|
if (rc)
|
|
return rc;
|
|
info->power_status = level;
|
|
|
|
/* Figure out if there is an adapter in the slot */
|
|
rc = rpaphp_get_sensor_state(slot, &state);
|
|
if (rc)
|
|
return rc;
|
|
|
|
bus = pcibios_find_pci_bus(slot->dn);
|
|
if (!bus) {
|
|
err("%s: no pci_bus for dn %s\n", __func__, slot->dn->full_name);
|
|
return -EINVAL;
|
|
}
|
|
|
|
info->adapter_status = EMPTY;
|
|
slot->bus = bus;
|
|
slot->pci_devs = &bus->devices;
|
|
|
|
/* if there's an adapter in the slot, go add the pci devices */
|
|
if (state == PRESENT) {
|
|
info->adapter_status = NOT_CONFIGURED;
|
|
slot->state = NOT_CONFIGURED;
|
|
|
|
/* non-empty slot has to have child */
|
|
if (!slot->dn->child) {
|
|
err("%s: slot[%s]'s device_node doesn't have child for adapter\n",
|
|
__func__, slot->name);
|
|
return -EINVAL;
|
|
}
|
|
|
|
if (list_empty(&bus->devices))
|
|
pcibios_add_pci_devices(bus);
|
|
|
|
if (!list_empty(&bus->devices)) {
|
|
info->adapter_status = CONFIGURED;
|
|
slot->state = CONFIGURED;
|
|
}
|
|
|
|
if (rpaphp_debug) {
|
|
struct pci_dev *dev;
|
|
dbg("%s: pci_devs of slot[%s]\n", __func__, slot->dn->full_name);
|
|
list_for_each_entry (dev, &bus->devices, bus_list)
|
|
dbg("\t%s\n", pci_name(dev));
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|