Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * Standard Hot Plug Controller Driver |
| 3 | * |
| 4 | * Copyright (C) 1995,2001 Compaq Computer Corporation |
| 5 | * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com) |
| 6 | * Copyright (C) 2001 IBM Corp. |
| 7 | * Copyright (C) 2003-2004 Intel Corporation |
| 8 | * |
| 9 | * All rights reserved. |
| 10 | * |
| 11 | * This program is free software; you can redistribute it and/or modify |
| 12 | * it under the terms of the GNU General Public License as published by |
| 13 | * the Free Software Foundation; either version 2 of the License, or (at |
| 14 | * your option) any later version. |
| 15 | * |
| 16 | * This program is distributed in the hope that it will be useful, but |
| 17 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 18 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or |
| 19 | * NON INFRINGEMENT. See the GNU General Public License for more |
| 20 | * details. |
| 21 | * |
| 22 | * You should have received a copy of the GNU General Public License |
| 23 | * along with this program; if not, write to the Free Software |
| 24 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| 25 | * |
Kristen Accardi | 8cf4c19 | 2005-08-16 15:16:10 -0700 | [diff] [blame] | 26 | * Send feedback to <greg@kroah.com>, <kristen.c.accardi@intel.com> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 27 | * |
| 28 | */ |
| 29 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 30 | #include <linux/module.h> |
| 31 | #include <linux/moduleparam.h> |
| 32 | #include <linux/kernel.h> |
| 33 | #include <linux/types.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 34 | #include <linux/pci.h> |
Kenji Kaneshige | f7391f5 | 2006-02-21 15:45:45 -0800 | [diff] [blame] | 35 | #include <linux/workqueue.h> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | #include "shpchp.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 37 | |
| 38 | /* Global variables */ |
| 39 | int shpchp_debug; |
| 40 | int shpchp_poll_mode; |
| 41 | int shpchp_poll_time; |
Kenji Kaneshige | f7391f5 | 2006-02-21 15:45:45 -0800 | [diff] [blame] | 42 | struct workqueue_struct *shpchp_wq; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | |
| 44 | #define DRIVER_VERSION "0.4" |
| 45 | #define DRIVER_AUTHOR "Dan Zink <dan.zink@compaq.com>, Greg Kroah-Hartman <greg@kroah.com>, Dely Sy <dely.l.sy@intel.com>" |
| 46 | #define DRIVER_DESC "Standard Hot Plug PCI Controller Driver" |
| 47 | |
| 48 | MODULE_AUTHOR(DRIVER_AUTHOR); |
| 49 | MODULE_DESCRIPTION(DRIVER_DESC); |
| 50 | MODULE_LICENSE("GPL"); |
| 51 | |
| 52 | module_param(shpchp_debug, bool, 0644); |
| 53 | module_param(shpchp_poll_mode, bool, 0644); |
| 54 | module_param(shpchp_poll_time, int, 0644); |
| 55 | MODULE_PARM_DESC(shpchp_debug, "Debugging mode enabled or not"); |
| 56 | MODULE_PARM_DESC(shpchp_poll_mode, "Using polling mechanism for hot-plug events or not"); |
| 57 | MODULE_PARM_DESC(shpchp_poll_time, "Polling mechanism frequency, in seconds"); |
| 58 | |
| 59 | #define SHPC_MODULE_NAME "shpchp" |
| 60 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | static int set_attention_status (struct hotplug_slot *slot, u8 value); |
| 62 | static int enable_slot (struct hotplug_slot *slot); |
| 63 | static int disable_slot (struct hotplug_slot *slot); |
| 64 | static int get_power_status (struct hotplug_slot *slot, u8 *value); |
| 65 | static int get_attention_status (struct hotplug_slot *slot, u8 *value); |
| 66 | static int get_latch_status (struct hotplug_slot *slot, u8 *value); |
| 67 | static int get_adapter_status (struct hotplug_slot *slot, u8 *value); |
| 68 | static int get_max_bus_speed (struct hotplug_slot *slot, enum pci_bus_speed *value); |
| 69 | static int get_cur_bus_speed (struct hotplug_slot *slot, enum pci_bus_speed *value); |
| 70 | |
| 71 | static struct hotplug_slot_ops shpchp_hotplug_slot_ops = { |
| 72 | .owner = THIS_MODULE, |
| 73 | .set_attention_status = set_attention_status, |
| 74 | .enable_slot = enable_slot, |
| 75 | .disable_slot = disable_slot, |
| 76 | .get_power_status = get_power_status, |
| 77 | .get_attention_status = get_attention_status, |
| 78 | .get_latch_status = get_latch_status, |
| 79 | .get_adapter_status = get_adapter_status, |
| 80 | .get_max_bus_speed = get_max_bus_speed, |
| 81 | .get_cur_bus_speed = get_cur_bus_speed, |
| 82 | }; |
| 83 | |
| 84 | /** |
| 85 | * release_slot - free up the memory used by a slot |
| 86 | * @hotplug_slot: slot to free |
| 87 | */ |
| 88 | static void release_slot(struct hotplug_slot *hotplug_slot) |
| 89 | { |
Dely Sy | ee17fd9 | 2005-05-05 11:57:25 -0700 | [diff] [blame] | 90 | struct slot *slot = hotplug_slot->private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 92 | dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | |
| 94 | kfree(slot->hotplug_slot->info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 95 | kfree(slot->hotplug_slot); |
| 96 | kfree(slot); |
| 97 | } |
| 98 | |
| 99 | static int init_slots(struct controller *ctrl) |
| 100 | { |
Kenji Kaneshige | 926030f | 2006-01-26 09:55:35 +0900 | [diff] [blame] | 101 | struct slot *slot; |
| 102 | struct hotplug_slot *hotplug_slot; |
| 103 | struct hotplug_slot_info *info; |
Kenji Kaneshige | 926030f | 2006-01-26 09:55:35 +0900 | [diff] [blame] | 104 | int retval = -ENOMEM; |
Alex Chiang | 5fe6cc6 | 2008-10-20 17:41:02 -0600 | [diff] [blame^] | 105 | int i; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | |
Kenji Kaneshige | 926030f | 2006-01-26 09:55:35 +0900 | [diff] [blame] | 107 | for (i = 0; i < ctrl->num_slots; i++) { |
Kenji Kaneshige | 57c95c0 | 2006-01-26 10:02:41 +0900 | [diff] [blame] | 108 | slot = kzalloc(sizeof(*slot), GFP_KERNEL); |
Kenji Kaneshige | 926030f | 2006-01-26 09:55:35 +0900 | [diff] [blame] | 109 | if (!slot) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | goto error; |
| 111 | |
Kenji Kaneshige | 57c95c0 | 2006-01-26 10:02:41 +0900 | [diff] [blame] | 112 | hotplug_slot = kzalloc(sizeof(*hotplug_slot), GFP_KERNEL); |
Kenji Kaneshige | 926030f | 2006-01-26 09:55:35 +0900 | [diff] [blame] | 113 | if (!hotplug_slot) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | goto error_slot; |
Kenji Kaneshige | 926030f | 2006-01-26 09:55:35 +0900 | [diff] [blame] | 115 | slot->hotplug_slot = hotplug_slot; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 116 | |
Kenji Kaneshige | 57c95c0 | 2006-01-26 10:02:41 +0900 | [diff] [blame] | 117 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
Kenji Kaneshige | 926030f | 2006-01-26 09:55:35 +0900 | [diff] [blame] | 118 | if (!info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 119 | goto error_hpslot; |
Kenji Kaneshige | 926030f | 2006-01-26 09:55:35 +0900 | [diff] [blame] | 120 | hotplug_slot->info = info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 121 | |
Kenji Kaneshige | bbe779d | 2006-01-26 10:04:56 +0900 | [diff] [blame] | 122 | hotplug_slot->name = slot->name; |
Kenji Kaneshige | 926030f | 2006-01-26 09:55:35 +0900 | [diff] [blame] | 123 | |
| 124 | slot->hp_slot = i; |
Kenji Kaneshige | 926030f | 2006-01-26 09:55:35 +0900 | [diff] [blame] | 125 | slot->ctrl = ctrl; |
Kenji Kaneshige | 227b84c | 2006-12-16 15:25:42 -0800 | [diff] [blame] | 126 | slot->bus = ctrl->pci_dev->subordinate->number; |
Kenji Kaneshige | 926030f | 2006-01-26 09:55:35 +0900 | [diff] [blame] | 127 | slot->device = ctrl->slot_device_offset + i; |
| 128 | slot->hpc_ops = ctrl->hpc_ops; |
Kenji Kaneshige | 6f39be2 | 2006-12-16 15:25:49 -0800 | [diff] [blame] | 129 | slot->number = ctrl->first_slot + (ctrl->slot_num_inc * i); |
Kenji Kaneshige | a246fa4 | 2006-02-21 15:45:48 -0800 | [diff] [blame] | 130 | mutex_init(&slot->lock); |
Kristen Carlson Accardi | e325e1f | 2007-03-21 11:45:31 -0700 | [diff] [blame] | 131 | INIT_DELAYED_WORK(&slot->work, shpchp_queue_pushbutton_work); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 132 | |
| 133 | /* register this slot with the hotplug pci core */ |
Kenji Kaneshige | 926030f | 2006-01-26 09:55:35 +0900 | [diff] [blame] | 134 | hotplug_slot->private = slot; |
| 135 | hotplug_slot->release = &release_slot; |
Alex Chiang | d6a9e9b | 2008-08-21 15:13:47 -0600 | [diff] [blame] | 136 | snprintf(slot->name, SLOT_NAME_SIZE, "%d", slot->number); |
Kenji Kaneshige | 926030f | 2006-01-26 09:55:35 +0900 | [diff] [blame] | 137 | hotplug_slot->ops = &shpchp_hotplug_slot_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | |
Kenji Kaneshige | 926030f | 2006-01-26 09:55:35 +0900 | [diff] [blame] | 139 | get_power_status(hotplug_slot, &info->power_status); |
| 140 | get_attention_status(hotplug_slot, &info->attention_status); |
| 141 | get_latch_status(hotplug_slot, &info->latch_status); |
| 142 | get_adapter_status(hotplug_slot, &info->adapter_status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | |
Kenji Kaneshige | 926030f | 2006-01-26 09:55:35 +0900 | [diff] [blame] | 144 | dbg("Registering bus=%x dev=%x hp_slot=%x sun=%x " |
| 145 | "slot_device_offset=%x\n", slot->bus, slot->device, |
| 146 | slot->hp_slot, slot->number, ctrl->slot_device_offset); |
Alex Chiang | f46753c | 2008-06-10 15:28:50 -0600 | [diff] [blame] | 147 | retval = pci_hp_register(slot->hotplug_slot, |
Alex Chiang | 1359f27 | 2008-10-20 17:40:42 -0600 | [diff] [blame] | 148 | ctrl->pci_dev->subordinate, slot->device, |
| 149 | hotplug_slot->name); |
Kenji Kaneshige | 926030f | 2006-01-26 09:55:35 +0900 | [diff] [blame] | 150 | if (retval) { |
| 151 | err("pci_hp_register failed with error %d\n", retval); |
Kenji Kaneshige | bbe779d | 2006-01-26 10:04:56 +0900 | [diff] [blame] | 152 | goto error_info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 153 | } |
| 154 | |
Kenji Kaneshige | 5b1a960 | 2006-01-26 09:57:40 +0900 | [diff] [blame] | 155 | list_add(&slot->slot_list, &ctrl->slot_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 156 | } |
| 157 | |
| 158 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 159 | error_info: |
Kenji Kaneshige | 926030f | 2006-01-26 09:55:35 +0900 | [diff] [blame] | 160 | kfree(info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | error_hpslot: |
Kenji Kaneshige | 926030f | 2006-01-26 09:55:35 +0900 | [diff] [blame] | 162 | kfree(hotplug_slot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 163 | error_slot: |
Kenji Kaneshige | 926030f | 2006-01-26 09:55:35 +0900 | [diff] [blame] | 164 | kfree(slot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | error: |
Kenji Kaneshige | 926030f | 2006-01-26 09:55:35 +0900 | [diff] [blame] | 166 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 167 | } |
| 168 | |
Kenji Kaneshige | f7391f5 | 2006-02-21 15:45:45 -0800 | [diff] [blame] | 169 | void cleanup_slots(struct controller *ctrl) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 170 | { |
Kenji Kaneshige | 5b1a960 | 2006-01-26 09:57:40 +0900 | [diff] [blame] | 171 | struct list_head *tmp; |
| 172 | struct list_head *next; |
| 173 | struct slot *slot; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 174 | |
Kenji Kaneshige | 5b1a960 | 2006-01-26 09:57:40 +0900 | [diff] [blame] | 175 | list_for_each_safe(tmp, next, &ctrl->slot_list) { |
| 176 | slot = list_entry(tmp, struct slot, slot_list); |
| 177 | list_del(&slot->slot_list); |
Kenji Kaneshige | f7391f5 | 2006-02-21 15:45:45 -0800 | [diff] [blame] | 178 | cancel_delayed_work(&slot->work); |
Kenji Kaneshige | a246fa4 | 2006-02-21 15:45:48 -0800 | [diff] [blame] | 179 | flush_scheduled_work(); |
Kenji Kaneshige | f7391f5 | 2006-02-21 15:45:45 -0800 | [diff] [blame] | 180 | flush_workqueue(shpchp_wq); |
Kenji Kaneshige | 5b1a960 | 2006-01-26 09:57:40 +0900 | [diff] [blame] | 181 | pci_hp_deregister(slot->hotplug_slot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | } |
| 183 | } |
| 184 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | /* |
| 186 | * set_attention_status - Turns the Amber LED for a slot on, off or blink |
| 187 | */ |
| 188 | static int set_attention_status (struct hotplug_slot *hotplug_slot, u8 status) |
| 189 | { |
Kenji Kaneshige | 8352e04 | 2006-12-16 15:25:57 -0800 | [diff] [blame] | 190 | struct slot *slot = get_slot(hotplug_slot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 192 | dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 193 | |
| 194 | hotplug_slot->info->attention_status = status; |
| 195 | slot->hpc_ops->set_attention_status(slot, status); |
| 196 | |
| 197 | return 0; |
| 198 | } |
| 199 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 200 | static int enable_slot (struct hotplug_slot *hotplug_slot) |
| 201 | { |
Kenji Kaneshige | 8352e04 | 2006-12-16 15:25:57 -0800 | [diff] [blame] | 202 | struct slot *slot = get_slot(hotplug_slot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 203 | |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 204 | dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 205 | |
Kenji Kaneshige | a246fa4 | 2006-02-21 15:45:48 -0800 | [diff] [blame] | 206 | return shpchp_sysfs_enable_slot(slot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 207 | } |
| 208 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 209 | static int disable_slot (struct hotplug_slot *hotplug_slot) |
| 210 | { |
Kenji Kaneshige | 8352e04 | 2006-12-16 15:25:57 -0800 | [diff] [blame] | 211 | struct slot *slot = get_slot(hotplug_slot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 212 | |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 213 | dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 214 | |
Kenji Kaneshige | a246fa4 | 2006-02-21 15:45:48 -0800 | [diff] [blame] | 215 | return shpchp_sysfs_disable_slot(slot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 216 | } |
| 217 | |
| 218 | static int get_power_status (struct hotplug_slot *hotplug_slot, u8 *value) |
| 219 | { |
Kenji Kaneshige | 8352e04 | 2006-12-16 15:25:57 -0800 | [diff] [blame] | 220 | struct slot *slot = get_slot(hotplug_slot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 221 | int retval; |
| 222 | |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 223 | dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 224 | |
| 225 | retval = slot->hpc_ops->get_power_status(slot, value); |
| 226 | if (retval < 0) |
| 227 | *value = hotplug_slot->info->power_status; |
| 228 | |
| 229 | return 0; |
| 230 | } |
| 231 | |
| 232 | static int get_attention_status (struct hotplug_slot *hotplug_slot, u8 *value) |
| 233 | { |
Kenji Kaneshige | 8352e04 | 2006-12-16 15:25:57 -0800 | [diff] [blame] | 234 | struct slot *slot = get_slot(hotplug_slot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 235 | int retval; |
| 236 | |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 237 | dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 238 | |
| 239 | retval = slot->hpc_ops->get_attention_status(slot, value); |
| 240 | if (retval < 0) |
| 241 | *value = hotplug_slot->info->attention_status; |
| 242 | |
| 243 | return 0; |
| 244 | } |
| 245 | |
| 246 | static int get_latch_status (struct hotplug_slot *hotplug_slot, u8 *value) |
| 247 | { |
Kenji Kaneshige | 8352e04 | 2006-12-16 15:25:57 -0800 | [diff] [blame] | 248 | struct slot *slot = get_slot(hotplug_slot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 249 | int retval; |
| 250 | |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 251 | dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | |
| 253 | retval = slot->hpc_ops->get_latch_status(slot, value); |
| 254 | if (retval < 0) |
| 255 | *value = hotplug_slot->info->latch_status; |
| 256 | |
| 257 | return 0; |
| 258 | } |
| 259 | |
| 260 | static int get_adapter_status (struct hotplug_slot *hotplug_slot, u8 *value) |
| 261 | { |
Kenji Kaneshige | 8352e04 | 2006-12-16 15:25:57 -0800 | [diff] [blame] | 262 | struct slot *slot = get_slot(hotplug_slot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 263 | int retval; |
| 264 | |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 265 | dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 266 | |
| 267 | retval = slot->hpc_ops->get_adapter_status(slot, value); |
| 268 | if (retval < 0) |
| 269 | *value = hotplug_slot->info->adapter_status; |
| 270 | |
| 271 | return 0; |
| 272 | } |
| 273 | |
Alex Chiang | f46753c | 2008-06-10 15:28:50 -0600 | [diff] [blame] | 274 | static int get_max_bus_speed(struct hotplug_slot *hotplug_slot, |
| 275 | enum pci_bus_speed *value) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 276 | { |
Kenji Kaneshige | 8352e04 | 2006-12-16 15:25:57 -0800 | [diff] [blame] | 277 | struct slot *slot = get_slot(hotplug_slot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 278 | int retval; |
| 279 | |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 280 | dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name); |
Kenji Kaneshige | dfcd5f6 | 2006-01-26 09:56:53 +0900 | [diff] [blame] | 281 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 282 | retval = slot->hpc_ops->get_max_bus_speed(slot, value); |
| 283 | if (retval < 0) |
| 284 | *value = PCI_SPEED_UNKNOWN; |
| 285 | |
| 286 | return 0; |
| 287 | } |
| 288 | |
| 289 | static int get_cur_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value) |
| 290 | { |
Kenji Kaneshige | 8352e04 | 2006-12-16 15:25:57 -0800 | [diff] [blame] | 291 | struct slot *slot = get_slot(hotplug_slot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 292 | int retval; |
| 293 | |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 294 | dbg("%s - physical_slot = %s\n", __func__, hotplug_slot->name); |
Kenji Kaneshige | dfcd5f6 | 2006-01-26 09:56:53 +0900 | [diff] [blame] | 295 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 296 | retval = slot->hpc_ops->get_cur_bus_speed(slot, value); |
| 297 | if (retval < 0) |
| 298 | *value = PCI_SPEED_UNKNOWN; |
| 299 | |
| 300 | return 0; |
| 301 | } |
| 302 | |
rajesh.shah@intel.com | 1410dc1 | 2005-10-13 12:05:39 -0700 | [diff] [blame] | 303 | static int is_shpc_capable(struct pci_dev *dev) |
| 304 | { |
Kenji Kaneshige | ac9c052 | 2008-05-28 15:01:03 +0900 | [diff] [blame] | 305 | if ((dev->vendor == PCI_VENDOR_ID_AMD) || (dev->device == |
| 306 | PCI_DEVICE_ID_AMD_GOLAM_7450)) |
| 307 | return 1; |
| 308 | if (!pci_find_capability(dev, PCI_CAP_ID_SHPC)) |
| 309 | return 0; |
| 310 | if (get_hp_hw_control_from_firmware(dev)) |
| 311 | return 0; |
| 312 | return 1; |
rajesh.shah@intel.com | 1410dc1 | 2005-10-13 12:05:39 -0700 | [diff] [blame] | 313 | } |
| 314 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | static int shpc_probe(struct pci_dev *pdev, const struct pci_device_id *ent) |
| 316 | { |
| 317 | int rc; |
| 318 | struct controller *ctrl; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 319 | |
rajesh.shah@intel.com | 1410dc1 | 2005-10-13 12:05:39 -0700 | [diff] [blame] | 320 | if (!is_shpc_capable(pdev)) |
| 321 | return -ENODEV; |
| 322 | |
Kenji Kaneshige | 57c95c0 | 2006-01-26 10:02:41 +0900 | [diff] [blame] | 323 | ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 324 | if (!ctrl) { |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 325 | err("%s : out of memory\n", __func__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 326 | goto err_out_none; |
| 327 | } |
Kenji Kaneshige | 5b1a960 | 2006-01-26 09:57:40 +0900 | [diff] [blame] | 328 | INIT_LIST_HEAD(&ctrl->slot_list); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 329 | |
rajesh.shah@intel.com | ee13833 | 2005-10-13 12:05:42 -0700 | [diff] [blame] | 330 | rc = shpc_init(ctrl, pdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 331 | if (rc) { |
Kenji Kaneshige | dfcd5f6 | 2006-01-26 09:56:53 +0900 | [diff] [blame] | 332 | dbg("%s: controller initialization failed\n", |
| 333 | SHPC_MODULE_NAME); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 334 | goto err_out_free_ctrl; |
| 335 | } |
| 336 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 337 | pci_set_drvdata(pdev, ctrl); |
| 338 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 339 | /* Setup the slot information structures */ |
| 340 | rc = init_slots(ctrl); |
| 341 | if (rc) { |
Kenji Kaneshige | 8352e04 | 2006-12-16 15:25:57 -0800 | [diff] [blame] | 342 | err("%s: slot initialization failed\n", SHPC_MODULE_NAME); |
Kenji Kaneshige | f7391f5 | 2006-02-21 15:45:45 -0800 | [diff] [blame] | 343 | goto err_out_release_ctlr; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 344 | } |
| 345 | |
Greg Kroah-Hartman | e1b95dc | 2006-08-28 11:43:25 -0700 | [diff] [blame] | 346 | rc = shpchp_create_ctrl_files(ctrl); |
| 347 | if (rc) |
| 348 | goto err_cleanup_slots; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 349 | |
| 350 | return 0; |
| 351 | |
Greg Kroah-Hartman | e1b95dc | 2006-08-28 11:43:25 -0700 | [diff] [blame] | 352 | err_cleanup_slots: |
| 353 | cleanup_slots(ctrl); |
Kenji Kaneshige | f7391f5 | 2006-02-21 15:45:45 -0800 | [diff] [blame] | 354 | err_out_release_ctlr: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | ctrl->hpc_ops->release_ctlr(ctrl); |
| 356 | err_out_free_ctrl: |
| 357 | kfree(ctrl); |
| 358 | err_out_none: |
| 359 | return -ENODEV; |
| 360 | } |
| 361 | |
Kenji Kaneshige | e6b82b13 | 2006-02-21 15:45:50 -0800 | [diff] [blame] | 362 | static void shpc_remove(struct pci_dev *dev) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 363 | { |
Kenji Kaneshige | e6b82b13 | 2006-02-21 15:45:50 -0800 | [diff] [blame] | 364 | struct controller *ctrl = pci_get_drvdata(dev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 365 | |
Kenji Kaneshige | e6b82b13 | 2006-02-21 15:45:50 -0800 | [diff] [blame] | 366 | shpchp_remove_ctrl_files(ctrl); |
| 367 | ctrl->hpc_ops->release_ctlr(ctrl); |
| 368 | kfree(ctrl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 369 | } |
| 370 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 371 | static struct pci_device_id shpcd_pci_tbl[] = { |
Kenji Kaneshige | dfcd5f6 | 2006-01-26 09:56:53 +0900 | [diff] [blame] | 372 | {PCI_DEVICE_CLASS(((PCI_CLASS_BRIDGE_PCI << 8) | 0x00), ~0)}, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 373 | { /* end: all zeroes */ } |
| 374 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 375 | MODULE_DEVICE_TABLE(pci, shpcd_pci_tbl); |
| 376 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | static struct pci_driver shpc_driver = { |
| 378 | .name = SHPC_MODULE_NAME, |
| 379 | .id_table = shpcd_pci_tbl, |
| 380 | .probe = shpc_probe, |
Kenji Kaneshige | e6b82b13 | 2006-02-21 15:45:50 -0800 | [diff] [blame] | 381 | .remove = shpc_remove, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 382 | }; |
| 383 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | static int __init shpcd_init(void) |
| 385 | { |
| 386 | int retval = 0; |
| 387 | |
rajesh.shah@intel.com | 424600f | 2005-10-13 12:05:38 -0700 | [diff] [blame] | 388 | retval = pci_register_driver(&shpc_driver); |
Harvey Harrison | 66bef8c | 2008-03-03 19:09:46 -0800 | [diff] [blame] | 389 | dbg("%s: pci_register_driver = %d\n", __func__, retval); |
rajesh.shah@intel.com | 424600f | 2005-10-13 12:05:38 -0700 | [diff] [blame] | 390 | info(DRIVER_DESC " version: " DRIVER_VERSION "\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 391 | return retval; |
| 392 | } |
| 393 | |
| 394 | static void __exit shpcd_cleanup(void) |
| 395 | { |
| 396 | dbg("unload_shpchpd()\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 397 | pci_unregister_driver(&shpc_driver); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 398 | info(DRIVER_DESC " version: " DRIVER_VERSION " unloaded\n"); |
| 399 | } |
| 400 | |
| 401 | module_init(shpcd_init); |
| 402 | module_exit(shpcd_cleanup); |