/* * 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 (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;}