2 * PCI Hot Plug Controller Driver for RPA-compliant PPC64 platform.
3 * Copyright (C) 2003 Linda Xie <lxie@us.ibm.com>
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 (at
10 * your option) any later version.
12 * This program is distributed in the hope that it will be useful, but
13 * WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
15 * NON INFRINGEMENT. See the GNU General Public License for more
18 * You should have received a copy of the GNU General Public License
19 * along with this program; if not, write to the Free Software
20 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
22 * Send feedback to <lxie@us.ibm.com>
25 #include <linux/pci.h>
26 #include <linux/string.h>
28 #include <asm/pci-bridge.h>
30 #include <asm/machdep.h>
32 #include "../pci.h" /* for pci_add_new_bus */
35 int rpaphp_get_sensor_state(struct slot
*slot
, int *state
)
40 rc
= rtas_get_sensor(DR_ENTITY_SENSE
, slot
->index
, state
);
43 if (rc
== -EFAULT
|| rc
== -EEXIST
) {
44 dbg("%s: slot must be power up to get sensor-state\n",
47 /* some slots have to be powered up
48 * before get-sensor will succeed.
50 rc
= rtas_set_power_level(slot
->power_domain
, POWER_ON
,
53 dbg("%s: power on slot[%s] failed rc=%d.\n",
54 __FUNCTION__
, slot
->name
, rc
);
56 rc
= rtas_get_sensor(DR_ENTITY_SENSE
,
59 } else if (rc
== -ENODEV
)
60 info("%s: slot is unusable\n", __FUNCTION__
);
62 err("%s failed to get sensor state\n", __FUNCTION__
);
68 * get_pci_adapter_status - get the status of a slot
71 * 1-- adapter is configured
72 * 2-- adapter is not configured
75 int rpaphp_get_pci_adapter_status(struct slot
*slot
, int is_init
, u8
* value
)
81 rc
= rpaphp_get_sensor_state(slot
, &state
);
87 else if (state
== PRESENT
) {
89 /* at run-time slot->state can be changed by */
90 /* config/unconfig adapter */
93 bus
= pcibios_find_pci_bus(slot
->dn
);
94 if (bus
&& !list_empty(&bus
->devices
))
97 *value
= NOT_CONFIGURED
;
104 static void print_slot_pci_funcs(struct pci_bus
*bus
)
106 struct device_node
*dn
;
109 dn
= pci_bus_to_OF_node(bus
);
113 dbg("%s: pci_devs of slot[%s]\n", __FUNCTION__
, dn
->full_name
);
114 list_for_each_entry (dev
, &bus
->devices
, bus_list
)
115 dbg("\t%s\n", pci_name(dev
));
119 static void set_slot_name(struct slot
*slot
)
121 struct pci_bus
*bus
= slot
->bus
;
122 struct pci_dev
*bridge
;
126 strcpy(slot
->name
, pci_name(bridge
));
128 sprintf(slot
->name
, "%04x:%02x:00.0", pci_domain_nr(bus
),
132 static int setup_pci_slot(struct slot
*slot
)
134 struct device_node
*dn
= slot
->dn
;
138 bus
= pcibios_find_pci_bus(dn
);
140 err("%s: no pci_bus for dn %s\n", __FUNCTION__
, dn
->full_name
);
145 slot
->pci_devs
= &bus
->devices
;
148 /* find slot's pci_dev if it's not empty */
149 if (slot
->hotplug_slot
->info
->adapter_status
== EMPTY
) {
150 slot
->state
= EMPTY
; /* slot is empty */
152 /* slot is occupied */
154 /* non-empty slot has to have child */
155 err("%s: slot[%s]'s device_node doesn't have child for adapter\n",
156 __FUNCTION__
, slot
->name
);
160 if (slot
->hotplug_slot
->info
->adapter_status
== NOT_CONFIGURED
) {
161 dbg("%s CONFIGURING pci adapter in slot[%s]\n",
162 __FUNCTION__
, slot
->name
);
163 pcibios_add_pci_devices(slot
->bus
);
165 } else if (slot
->hotplug_slot
->info
->adapter_status
!= CONFIGURED
) {
166 err("%s: slot[%s]'s adapter_status is NOT_VALID.\n",
167 __FUNCTION__
, slot
->name
);
170 print_slot_pci_funcs(slot
->bus
);
171 if (!list_empty(slot
->pci_devs
)) {
172 slot
->state
= CONFIGURED
;
174 /* DLPAR add as opposed to
176 slot
->state
= NOT_CONFIGURED
;
184 int rpaphp_register_pci_slot(struct slot
*slot
)
186 struct hotplug_slot_info
*info
= slot
->hotplug_slot
->info
;
188 rpaphp_get_power_status(slot
, &info
->power_status
);
189 rpaphp_get_pci_adapter_status(slot
, 1, &info
->adapter_status
);
191 if (info
->adapter_status
== NOT_VALID
) {
192 err("%s: NOT_VALID: skip dn->full_name=%s\n",
193 __FUNCTION__
, slot
->dn
->full_name
);
197 if (setup_pci_slot(slot
))
200 return rpaphp_register_slot(slot
);