/* * 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; }