Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * PCI Hot Plug Controller Driver for RPA-compliant PPC64 platform. | |
3 | * Copyright (C) 2003 Linda Xie <lxie@us.ibm.com> | |
4 | * | |
5 | * All rights reserved. | |
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 (at | |
10 | * your option) any later version. | |
11 | * | |
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 | |
16 | * details. | |
17 | * | |
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. | |
21 | * | |
22 | * Send feedback to <lxie@us.ibm.com> | |
23 | * | |
24 | */ | |
25 | #include <linux/pci.h> | |
4e57b681 TS |
26 | #include <linux/string.h> |
27 | ||
1da177e4 LT |
28 | #include <asm/pci-bridge.h> |
29 | #include <asm/rtas.h> | |
30 | #include <asm/machdep.h> | |
1da177e4 | 31 | |
4e57b681 | 32 | #include "../pci.h" /* for pci_add_new_bus */ |
1da177e4 LT |
33 | #include "rpaphp.h" |
34 | ||
e06b80b7 | 35 | int rpaphp_get_sensor_state(struct slot *slot, int *state) |
1da177e4 LT |
36 | { |
37 | int rc; | |
38 | int setlevel; | |
39 | ||
40 | rc = rtas_get_sensor(DR_ENTITY_SENSE, slot->index, state); | |
41 | ||
42 | if (rc < 0) { | |
43 | if (rc == -EFAULT || rc == -EEXIST) { | |
44 | dbg("%s: slot must be power up to get sensor-state\n", | |
45 | __FUNCTION__); | |
46 | ||
47 | /* some slots have to be powered up | |
48 | * before get-sensor will succeed. | |
49 | */ | |
50 | rc = rtas_set_power_level(slot->power_domain, POWER_ON, | |
51 | &setlevel); | |
52 | if (rc < 0) { | |
53 | dbg("%s: power on slot[%s] failed rc=%d.\n", | |
54 | __FUNCTION__, slot->name, rc); | |
55 | } else { | |
56 | rc = rtas_get_sensor(DR_ENTITY_SENSE, | |
57 | slot->index, state); | |
58 | } | |
59 | } else if (rc == -ENODEV) | |
60 | info("%s: slot is unusable\n", __FUNCTION__); | |
61 | else | |
62 | err("%s failed to get sensor state\n", __FUNCTION__); | |
63 | } | |
64 | return rc; | |
65 | } | |
66 | ||
9c209c91 | 67 | static void set_slot_name(struct slot *slot) |
1da177e4 | 68 | { |
9c209c91 JR |
69 | struct pci_bus *bus = slot->bus; |
70 | struct pci_dev *bridge; | |
71 | ||
72 | bridge = bus->self; | |
73 | if (bridge) | |
74 | strcpy(slot->name, pci_name(bridge)); | |
75 | else | |
76 | sprintf(slot->name, "%04x:%02x:00.0", pci_domain_nr(bus), | |
77 | bus->number); | |
1da177e4 LT |
78 | } |
79 | ||
fea54b8c LV |
80 | /** |
81 | * rpaphp_enable_slot - record slot state, config pci device | |
82 | * | |
83 | * Initialize values in the slot, and the hotplug_slot info | |
84 | * structures to indicate if there is a pci card plugged into | |
85 | * the slot. If the slot is not empty, run the pcibios routine | |
86 | * to get pcibios stuff correctly set up. | |
87 | */ | |
88 | int rpaphp_enable_slot(struct slot *slot) | |
1da177e4 | 89 | { |
bf0af511 LV |
90 | int rc, level, state; |
91 | struct pci_bus *bus; | |
517d5a04 LV |
92 | struct hotplug_slot_info *info = slot->hotplug_slot->info; |
93 | ||
03a66755 LV |
94 | info->adapter_status = NOT_VALID; |
95 | slot->state = EMPTY; | |
96 | ||
bf0af511 | 97 | /* Find out if the power is turned on for the slot */ |
427310ff LV |
98 | rc = rtas_get_power_level(slot->power_domain, &level); |
99 | if (rc) | |
100 | return rc; | |
101 | info->power_status = level; | |
102 | ||
bf0af511 | 103 | /* Figure out if there is an adapter in the slot */ |
bf0af511 LV |
104 | rc = rpaphp_get_sensor_state(slot, &state); |
105 | if (rc) | |
106 | return rc; | |
517d5a04 | 107 | |
03a66755 LV |
108 | bus = pcibios_find_pci_bus(slot->dn); |
109 | if (!bus) { | |
110 | err("%s: no pci_bus for dn %s\n", __FUNCTION__, slot->dn->full_name); | |
111 | return -EINVAL; | |
517d5a04 | 112 | } |
1da177e4 | 113 | |
03a66755 LV |
114 | info->adapter_status = EMPTY; |
115 | slot->bus = bus; | |
116 | slot->pci_devs = &bus->devices; | |
117 | set_slot_name(slot); | |
118 | ||
119 | /* if there's an adapter in the slot, go add the pci devices */ | |
120 | if (state == PRESENT) { | |
121 | info->adapter_status = NOT_CONFIGURED; | |
122 | slot->state = NOT_CONFIGURED; | |
123 | ||
124 | /* non-empty slot has to have child */ | |
125 | if (!slot->dn->child) { | |
126 | err("%s: slot[%s]'s device_node doesn't have child for adapter\n", | |
127 | __FUNCTION__, slot->name); | |
128 | return -EINVAL; | |
129 | } | |
130 | ||
131 | if (list_empty(&bus->devices)) | |
132 | pcibios_add_pci_devices(bus); | |
133 | ||
03a66755 LV |
134 | if (!list_empty(&bus->devices)) { |
135 | info->adapter_status = CONFIGURED; | |
136 | slot->state = CONFIGURED; | |
137 | } | |
307ff12e LV |
138 | |
139 | if (debug) { | |
140 | struct pci_dev *dev; | |
141 | dbg("%s: pci_devs of slot[%s]\n", __FUNCTION__, slot->dn->full_name); | |
142 | list_for_each_entry (dev, &bus->devices, bus_list) | |
143 | dbg("\t%s\n", pci_name(dev)); | |
144 | } | |
03a66755 | 145 | } |
517d5a04 | 146 | |
6f79eb74 | 147 | return 0; |
1da177e4 LT |
148 | } |
149 |