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> |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #include "shpchp.h" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 36 | |
| 37 | /* Global variables */ |
| 38 | int shpchp_debug; |
| 39 | int shpchp_poll_mode; |
| 40 | int shpchp_poll_time; |
| 41 | struct controller *shpchp_ctrl_list; /* = NULL */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 42 | |
| 43 | #define DRIVER_VERSION "0.4" |
| 44 | #define DRIVER_AUTHOR "Dan Zink <dan.zink@compaq.com>, Greg Kroah-Hartman <greg@kroah.com>, Dely Sy <dely.l.sy@intel.com>" |
| 45 | #define DRIVER_DESC "Standard Hot Plug PCI Controller Driver" |
| 46 | |
| 47 | MODULE_AUTHOR(DRIVER_AUTHOR); |
| 48 | MODULE_DESCRIPTION(DRIVER_DESC); |
| 49 | MODULE_LICENSE("GPL"); |
| 50 | |
| 51 | module_param(shpchp_debug, bool, 0644); |
| 52 | module_param(shpchp_poll_mode, bool, 0644); |
| 53 | module_param(shpchp_poll_time, int, 0644); |
| 54 | MODULE_PARM_DESC(shpchp_debug, "Debugging mode enabled or not"); |
| 55 | MODULE_PARM_DESC(shpchp_poll_mode, "Using polling mechanism for hot-plug events or not"); |
| 56 | MODULE_PARM_DESC(shpchp_poll_time, "Polling mechanism frequency, in seconds"); |
| 57 | |
| 58 | #define SHPC_MODULE_NAME "shpchp" |
| 59 | |
| 60 | static int shpc_start_thread (void); |
| 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); |
Kenji Kaneshige | 81f1544 | 2005-12-05 19:31:00 +0900 | [diff] [blame] | 68 | static int get_address (struct hotplug_slot *slot, u32 *value); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 69 | static int get_max_bus_speed (struct hotplug_slot *slot, enum pci_bus_speed *value); |
| 70 | static int get_cur_bus_speed (struct hotplug_slot *slot, enum pci_bus_speed *value); |
| 71 | |
| 72 | static struct hotplug_slot_ops shpchp_hotplug_slot_ops = { |
| 73 | .owner = THIS_MODULE, |
| 74 | .set_attention_status = set_attention_status, |
| 75 | .enable_slot = enable_slot, |
| 76 | .disable_slot = disable_slot, |
| 77 | .get_power_status = get_power_status, |
| 78 | .get_attention_status = get_attention_status, |
| 79 | .get_latch_status = get_latch_status, |
| 80 | .get_adapter_status = get_adapter_status, |
Kenji Kaneshige | 81f1544 | 2005-12-05 19:31:00 +0900 | [diff] [blame] | 81 | .get_address = get_address, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | .get_max_bus_speed = get_max_bus_speed, |
| 83 | .get_cur_bus_speed = get_cur_bus_speed, |
| 84 | }; |
| 85 | |
| 86 | /** |
| 87 | * release_slot - free up the memory used by a slot |
| 88 | * @hotplug_slot: slot to free |
| 89 | */ |
| 90 | static void release_slot(struct hotplug_slot *hotplug_slot) |
| 91 | { |
Dely Sy | ee17fd9 | 2005-05-05 11:57:25 -0700 | [diff] [blame] | 92 | struct slot *slot = hotplug_slot->private; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 93 | |
| 94 | dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); |
| 95 | |
| 96 | kfree(slot->hotplug_slot->info); |
| 97 | kfree(slot->hotplug_slot->name); |
| 98 | kfree(slot->hotplug_slot); |
| 99 | kfree(slot); |
| 100 | } |
| 101 | |
Kenji Kaneshige | 926030f | 2006-01-26 09:55:35 +0900 | [diff] [blame] | 102 | #define SLOT_NAME_SIZE 10 |
| 103 | static void make_slot_name(struct slot *slot) |
| 104 | { |
| 105 | snprintf(slot->hotplug_slot->name, SLOT_NAME_SIZE, "%04d_%04d", |
| 106 | slot->bus, slot->number); |
| 107 | } |
| 108 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 109 | static int init_slots(struct controller *ctrl) |
| 110 | { |
Kenji Kaneshige | 926030f | 2006-01-26 09:55:35 +0900 | [diff] [blame] | 111 | struct slot *slot; |
| 112 | struct hotplug_slot *hotplug_slot; |
| 113 | struct hotplug_slot_info *info; |
| 114 | char *name; |
| 115 | int retval = -ENOMEM; |
| 116 | int i; |
| 117 | u32 sun; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 118 | |
Kenji Kaneshige | 926030f | 2006-01-26 09:55:35 +0900 | [diff] [blame] | 119 | for (i = 0; i < ctrl->num_slots; i++) { |
| 120 | slot = kmalloc(sizeof(struct slot), GFP_KERNEL); |
| 121 | if (!slot) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | goto error; |
Kenji Kaneshige | 926030f | 2006-01-26 09:55:35 +0900 | [diff] [blame] | 123 | memset(slot, 0, sizeof(struct slot)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 124 | |
Kenji Kaneshige | 926030f | 2006-01-26 09:55:35 +0900 | [diff] [blame] | 125 | hotplug_slot = kmalloc(sizeof(struct hotplug_slot), |
| 126 | GFP_KERNEL); |
| 127 | if (!hotplug_slot) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 128 | goto error_slot; |
Kenji Kaneshige | 926030f | 2006-01-26 09:55:35 +0900 | [diff] [blame] | 129 | memset(hotplug_slot, 0, sizeof(struct hotplug_slot)); |
| 130 | slot->hotplug_slot = hotplug_slot; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | |
Kenji Kaneshige | 926030f | 2006-01-26 09:55:35 +0900 | [diff] [blame] | 132 | info = kmalloc(sizeof(struct hotplug_slot_info), GFP_KERNEL); |
| 133 | if (!info) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | goto error_hpslot; |
Kenji Kaneshige | 926030f | 2006-01-26 09:55:35 +0900 | [diff] [blame] | 135 | memset(info, 0, sizeof (struct hotplug_slot_info)); |
| 136 | hotplug_slot->info = info; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 137 | |
Kenji Kaneshige | 926030f | 2006-01-26 09:55:35 +0900 | [diff] [blame] | 138 | name = kmalloc(SLOT_NAME_SIZE, GFP_KERNEL); |
| 139 | if (!name) |
| 140 | goto error_info; |
| 141 | hotplug_slot->name = name; |
| 142 | |
| 143 | slot->hp_slot = i; |
| 144 | slot->magic = SLOT_MAGIC; |
| 145 | slot->ctrl = ctrl; |
| 146 | slot->bus = ctrl->slot_bus; |
| 147 | slot->device = ctrl->slot_device_offset + i; |
| 148 | slot->hpc_ops = ctrl->hpc_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | |
| 150 | if (shpchprm_get_physical_slot_number(ctrl, &sun, |
Kenji Kaneshige | 926030f | 2006-01-26 09:55:35 +0900 | [diff] [blame] | 151 | slot->bus, slot->device)) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | goto error_name; |
| 153 | |
Kenji Kaneshige | 926030f | 2006-01-26 09:55:35 +0900 | [diff] [blame] | 154 | slot->number = sun; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 155 | |
| 156 | /* register this slot with the hotplug pci core */ |
Kenji Kaneshige | 926030f | 2006-01-26 09:55:35 +0900 | [diff] [blame] | 157 | hotplug_slot->private = slot; |
| 158 | hotplug_slot->release = &release_slot; |
| 159 | make_slot_name(slot); |
| 160 | hotplug_slot->ops = &shpchp_hotplug_slot_ops; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | |
Kenji Kaneshige | 926030f | 2006-01-26 09:55:35 +0900 | [diff] [blame] | 162 | get_power_status(hotplug_slot, &info->power_status); |
| 163 | get_attention_status(hotplug_slot, &info->attention_status); |
| 164 | get_latch_status(hotplug_slot, &info->latch_status); |
| 165 | get_adapter_status(hotplug_slot, &info->adapter_status); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | |
Kenji Kaneshige | 926030f | 2006-01-26 09:55:35 +0900 | [diff] [blame] | 167 | dbg("Registering bus=%x dev=%x hp_slot=%x sun=%x " |
| 168 | "slot_device_offset=%x\n", slot->bus, slot->device, |
| 169 | slot->hp_slot, slot->number, ctrl->slot_device_offset); |
| 170 | retval = pci_hp_register(slot->hotplug_slot); |
| 171 | if (retval) { |
| 172 | err("pci_hp_register failed with error %d\n", retval); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 173 | goto error_name; |
| 174 | } |
| 175 | |
Kenji Kaneshige | 926030f | 2006-01-26 09:55:35 +0900 | [diff] [blame] | 176 | slot->next = ctrl->slot; |
| 177 | ctrl->slot = slot; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 178 | } |
| 179 | |
| 180 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 181 | error_name: |
Kenji Kaneshige | 926030f | 2006-01-26 09:55:35 +0900 | [diff] [blame] | 182 | kfree(name); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 183 | error_info: |
Kenji Kaneshige | 926030f | 2006-01-26 09:55:35 +0900 | [diff] [blame] | 184 | kfree(info); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 185 | error_hpslot: |
Kenji Kaneshige | 926030f | 2006-01-26 09:55:35 +0900 | [diff] [blame] | 186 | kfree(hotplug_slot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 187 | error_slot: |
Kenji Kaneshige | 926030f | 2006-01-26 09:55:35 +0900 | [diff] [blame] | 188 | kfree(slot); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | error: |
Kenji Kaneshige | 926030f | 2006-01-26 09:55:35 +0900 | [diff] [blame] | 190 | return retval; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 191 | } |
| 192 | |
| 193 | static void cleanup_slots(struct controller *ctrl) |
| 194 | { |
| 195 | struct slot *old_slot, *next_slot; |
| 196 | |
| 197 | old_slot = ctrl->slot; |
| 198 | ctrl->slot = NULL; |
| 199 | |
| 200 | while (old_slot) { |
| 201 | next_slot = old_slot->next; |
| 202 | pci_hp_deregister(old_slot->hotplug_slot); |
| 203 | old_slot = next_slot; |
| 204 | } |
| 205 | } |
| 206 | |
| 207 | static int get_ctlr_slot_config(struct controller *ctrl) |
| 208 | { |
| 209 | int num_ctlr_slots; |
| 210 | int first_device_num; |
| 211 | int physical_slot_num; |
| 212 | int updown; |
| 213 | int rc; |
| 214 | int flags; |
| 215 | |
Kenji Kaneshige | dfcd5f6 | 2006-01-26 09:56:53 +0900 | [diff] [blame^] | 216 | rc = shpc_get_ctlr_slot_config(ctrl, &num_ctlr_slots, |
| 217 | &first_device_num, &physical_slot_num, |
| 218 | &updown, &flags); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 219 | if (rc) { |
Kenji Kaneshige | dfcd5f6 | 2006-01-26 09:56:53 +0900 | [diff] [blame^] | 220 | err("%s: get_ctlr_slot_config fail for b:d (%x:%x)\n", |
| 221 | __FUNCTION__, ctrl->bus, ctrl->device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 222 | return -1; |
| 223 | } |
| 224 | |
| 225 | ctrl->num_slots = num_ctlr_slots; |
| 226 | ctrl->slot_device_offset = first_device_num; |
| 227 | ctrl->first_slot = physical_slot_num; |
| 228 | ctrl->slot_num_inc = updown; /* either -1 or 1 */ |
| 229 | |
Kenji Kaneshige | dfcd5f6 | 2006-01-26 09:56:53 +0900 | [diff] [blame^] | 230 | dbg("%s: num_slot(0x%x) 1st_dev(0x%x) psn(0x%x) updown(%d) for b:d " |
| 231 | "(%x:%x)\n", __FUNCTION__, num_ctlr_slots, first_device_num, |
| 232 | physical_slot_num, updown, ctrl->bus, ctrl->device); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 233 | |
| 234 | return 0; |
| 235 | } |
| 236 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 237 | /* |
| 238 | * set_attention_status - Turns the Amber LED for a slot on, off or blink |
| 239 | */ |
| 240 | static int set_attention_status (struct hotplug_slot *hotplug_slot, u8 status) |
| 241 | { |
Kenji Kaneshige | dfcd5f6 | 2006-01-26 09:56:53 +0900 | [diff] [blame^] | 242 | struct slot *slot = get_slot(hotplug_slot, __FUNCTION__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 243 | |
| 244 | dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); |
| 245 | |
| 246 | hotplug_slot->info->attention_status = status; |
| 247 | slot->hpc_ops->set_attention_status(slot, status); |
| 248 | |
| 249 | return 0; |
| 250 | } |
| 251 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 252 | static int enable_slot (struct hotplug_slot *hotplug_slot) |
| 253 | { |
Kenji Kaneshige | dfcd5f6 | 2006-01-26 09:56:53 +0900 | [diff] [blame^] | 254 | struct slot *slot = get_slot(hotplug_slot, __FUNCTION__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 255 | |
| 256 | dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); |
| 257 | |
| 258 | return shpchp_enable_slot(slot); |
| 259 | } |
| 260 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 261 | static int disable_slot (struct hotplug_slot *hotplug_slot) |
| 262 | { |
Kenji Kaneshige | dfcd5f6 | 2006-01-26 09:56:53 +0900 | [diff] [blame^] | 263 | struct slot *slot = get_slot(hotplug_slot, __FUNCTION__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 264 | |
| 265 | dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); |
| 266 | |
| 267 | return shpchp_disable_slot(slot); |
| 268 | } |
| 269 | |
| 270 | static int get_power_status (struct hotplug_slot *hotplug_slot, u8 *value) |
| 271 | { |
Kenji Kaneshige | dfcd5f6 | 2006-01-26 09:56:53 +0900 | [diff] [blame^] | 272 | struct slot *slot = get_slot(hotplug_slot, __FUNCTION__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 273 | int retval; |
| 274 | |
| 275 | dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); |
| 276 | |
| 277 | retval = slot->hpc_ops->get_power_status(slot, value); |
| 278 | if (retval < 0) |
| 279 | *value = hotplug_slot->info->power_status; |
| 280 | |
| 281 | return 0; |
| 282 | } |
| 283 | |
| 284 | static int get_attention_status (struct hotplug_slot *hotplug_slot, u8 *value) |
| 285 | { |
Kenji Kaneshige | dfcd5f6 | 2006-01-26 09:56:53 +0900 | [diff] [blame^] | 286 | struct slot *slot = get_slot(hotplug_slot, __FUNCTION__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 287 | int retval; |
| 288 | |
| 289 | dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); |
| 290 | |
| 291 | retval = slot->hpc_ops->get_attention_status(slot, value); |
| 292 | if (retval < 0) |
| 293 | *value = hotplug_slot->info->attention_status; |
| 294 | |
| 295 | return 0; |
| 296 | } |
| 297 | |
| 298 | static int get_latch_status (struct hotplug_slot *hotplug_slot, u8 *value) |
| 299 | { |
Kenji Kaneshige | dfcd5f6 | 2006-01-26 09:56:53 +0900 | [diff] [blame^] | 300 | struct slot *slot = get_slot(hotplug_slot, __FUNCTION__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 301 | int retval; |
| 302 | |
| 303 | dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); |
| 304 | |
| 305 | retval = slot->hpc_ops->get_latch_status(slot, value); |
| 306 | if (retval < 0) |
| 307 | *value = hotplug_slot->info->latch_status; |
| 308 | |
| 309 | return 0; |
| 310 | } |
| 311 | |
| 312 | static int get_adapter_status (struct hotplug_slot *hotplug_slot, u8 *value) |
| 313 | { |
Kenji Kaneshige | dfcd5f6 | 2006-01-26 09:56:53 +0900 | [diff] [blame^] | 314 | struct slot *slot = get_slot(hotplug_slot, __FUNCTION__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 315 | int retval; |
| 316 | |
| 317 | dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); |
| 318 | |
| 319 | retval = slot->hpc_ops->get_adapter_status(slot, value); |
| 320 | if (retval < 0) |
| 321 | *value = hotplug_slot->info->adapter_status; |
| 322 | |
| 323 | return 0; |
| 324 | } |
| 325 | |
Kenji Kaneshige | 81f1544 | 2005-12-05 19:31:00 +0900 | [diff] [blame] | 326 | static int get_address (struct hotplug_slot *hotplug_slot, u32 *value) |
| 327 | { |
Kenji Kaneshige | dfcd5f6 | 2006-01-26 09:56:53 +0900 | [diff] [blame^] | 328 | struct slot *slot = get_slot(hotplug_slot, __FUNCTION__); |
Kenji Kaneshige | 81f1544 | 2005-12-05 19:31:00 +0900 | [diff] [blame] | 329 | struct pci_bus *bus = slot->ctrl->pci_dev->subordinate; |
| 330 | |
| 331 | dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); |
| 332 | |
| 333 | *value = (pci_domain_nr(bus) << 16) | (slot->bus << 8) | slot->device; |
| 334 | |
| 335 | return 0; |
| 336 | } |
| 337 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 338 | static int get_max_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value) |
| 339 | { |
Kenji Kaneshige | dfcd5f6 | 2006-01-26 09:56:53 +0900 | [diff] [blame^] | 340 | struct slot *slot = get_slot(hotplug_slot, __FUNCTION__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 341 | int retval; |
| 342 | |
| 343 | dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); |
Kenji Kaneshige | dfcd5f6 | 2006-01-26 09:56:53 +0900 | [diff] [blame^] | 344 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 345 | retval = slot->hpc_ops->get_max_bus_speed(slot, value); |
| 346 | if (retval < 0) |
| 347 | *value = PCI_SPEED_UNKNOWN; |
| 348 | |
| 349 | return 0; |
| 350 | } |
| 351 | |
| 352 | static int get_cur_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value) |
| 353 | { |
Kenji Kaneshige | dfcd5f6 | 2006-01-26 09:56:53 +0900 | [diff] [blame^] | 354 | struct slot *slot = get_slot(hotplug_slot, __FUNCTION__); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 355 | int retval; |
| 356 | |
| 357 | dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name); |
Kenji Kaneshige | dfcd5f6 | 2006-01-26 09:56:53 +0900 | [diff] [blame^] | 358 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 359 | retval = slot->hpc_ops->get_cur_bus_speed(slot, value); |
| 360 | if (retval < 0) |
| 361 | *value = PCI_SPEED_UNKNOWN; |
| 362 | |
| 363 | return 0; |
| 364 | } |
| 365 | |
rajesh.shah@intel.com | 1410dc1 | 2005-10-13 12:05:39 -0700 | [diff] [blame] | 366 | static int is_shpc_capable(struct pci_dev *dev) |
| 367 | { |
| 368 | if ((dev->vendor == PCI_VENDOR_ID_AMD) || (dev->device == |
| 369 | PCI_DEVICE_ID_AMD_GOLAM_7450)) |
| 370 | return 1; |
| 371 | if (pci_find_capability(dev, PCI_CAP_ID_SHPC)) |
| 372 | return 1; |
| 373 | |
| 374 | return 0; |
| 375 | } |
| 376 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 377 | static int shpc_probe(struct pci_dev *pdev, const struct pci_device_id *ent) |
| 378 | { |
| 379 | int rc; |
| 380 | struct controller *ctrl; |
| 381 | struct slot *t_slot; |
Kenji Kaneshige | dfcd5f6 | 2006-01-26 09:56:53 +0900 | [diff] [blame^] | 382 | int first_device_num; /* first PCI device number */ |
| 383 | int num_ctlr_slots; /* number of slots implemented */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 384 | |
rajesh.shah@intel.com | 1410dc1 | 2005-10-13 12:05:39 -0700 | [diff] [blame] | 385 | if (!is_shpc_capable(pdev)) |
| 386 | return -ENODEV; |
| 387 | |
Kenji Kaneshige | dfcd5f6 | 2006-01-26 09:56:53 +0900 | [diff] [blame^] | 388 | ctrl = kmalloc(sizeof(struct controller), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 389 | if (!ctrl) { |
| 390 | err("%s : out of memory\n", __FUNCTION__); |
| 391 | goto err_out_none; |
| 392 | } |
| 393 | memset(ctrl, 0, sizeof(struct controller)); |
| 394 | |
rajesh.shah@intel.com | ee13833 | 2005-10-13 12:05:42 -0700 | [diff] [blame] | 395 | rc = shpc_init(ctrl, pdev); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 396 | if (rc) { |
Kenji Kaneshige | dfcd5f6 | 2006-01-26 09:56:53 +0900 | [diff] [blame^] | 397 | dbg("%s: controller initialization failed\n", |
| 398 | SHPC_MODULE_NAME); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 399 | goto err_out_free_ctrl; |
| 400 | } |
| 401 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 402 | pci_set_drvdata(pdev, ctrl); |
| 403 | |
Kenji Kaneshige | dfcd5f6 | 2006-01-26 09:56:53 +0900 | [diff] [blame^] | 404 | ctrl->pci_bus = kmalloc(sizeof (*ctrl->pci_bus), GFP_KERNEL); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 405 | if (!ctrl->pci_bus) { |
| 406 | err("out of memory\n"); |
| 407 | rc = -ENOMEM; |
| 408 | goto err_out_unmap_mmio_region; |
| 409 | } |
Kenji Kaneshige | dfcd5f6 | 2006-01-26 09:56:53 +0900 | [diff] [blame^] | 410 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 411 | memcpy (ctrl->pci_bus, pdev->bus, sizeof (*ctrl->pci_bus)); |
| 412 | ctrl->bus = pdev->bus->number; |
| 413 | ctrl->slot_bus = pdev->subordinate->number; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 414 | ctrl->device = PCI_SLOT(pdev->devfn); |
| 415 | ctrl->function = PCI_FUNC(pdev->devfn); |
Kenji Kaneshige | dfcd5f6 | 2006-01-26 09:56:53 +0900 | [diff] [blame^] | 416 | |
| 417 | dbg("ctrl bus=0x%x, device=%x, function=%x, irq=%x\n", |
| 418 | ctrl->bus, ctrl->device, ctrl->function, pdev->irq); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 419 | |
| 420 | /* |
Kenji Kaneshige | dfcd5f6 | 2006-01-26 09:56:53 +0900 | [diff] [blame^] | 421 | * Save configuration headers for this and subordinate PCI buses |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 422 | */ |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 423 | rc = get_ctlr_slot_config(ctrl); |
| 424 | if (rc) { |
| 425 | err(msg_initialization_err, rc); |
| 426 | goto err_out_free_ctrl_bus; |
| 427 | } |
| 428 | first_device_num = ctrl->slot_device_offset; |
| 429 | num_ctlr_slots = ctrl->num_slots; |
| 430 | |
rajesh.shah@intel.com | dbd7a78 | 2005-10-13 12:05:36 -0700 | [diff] [blame] | 431 | ctrl->add_support = 1; |
Kenji Kaneshige | dfcd5f6 | 2006-01-26 09:56:53 +0900 | [diff] [blame^] | 432 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 433 | /* Setup the slot information structures */ |
| 434 | rc = init_slots(ctrl); |
| 435 | if (rc) { |
| 436 | err(msg_initialization_err, 6); |
| 437 | goto err_out_free_ctrl_slot; |
| 438 | } |
| 439 | |
| 440 | /* Now hpc_functions (slot->hpc_ops->functions) are ready */ |
| 441 | t_slot = shpchp_find_slot(ctrl, first_device_num); |
| 442 | |
| 443 | /* Check for operation bus speed */ |
| 444 | rc = t_slot->hpc_ops->get_cur_bus_speed(t_slot, &ctrl->speed); |
| 445 | dbg("%s: t_slot->hp_slot %x\n", __FUNCTION__,t_slot->hp_slot); |
| 446 | |
| 447 | if (rc || ctrl->speed == PCI_SPEED_UNKNOWN) { |
Kenji Kaneshige | dfcd5f6 | 2006-01-26 09:56:53 +0900 | [diff] [blame^] | 448 | err(SHPC_MODULE_NAME ": Can't get current bus speed. " |
| 449 | "Set to 33MHz PCI.\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 450 | ctrl->speed = PCI_SPEED_33MHz; |
| 451 | } |
| 452 | |
| 453 | /* Finish setting up the hot plug ctrl device */ |
| 454 | ctrl->next_event = 0; |
| 455 | |
| 456 | if (!shpchp_ctrl_list) { |
| 457 | shpchp_ctrl_list = ctrl; |
| 458 | ctrl->next = NULL; |
| 459 | } else { |
| 460 | ctrl->next = shpchp_ctrl_list; |
| 461 | shpchp_ctrl_list = ctrl; |
| 462 | } |
| 463 | |
| 464 | shpchp_create_ctrl_files(ctrl); |
| 465 | |
| 466 | return 0; |
| 467 | |
| 468 | err_out_free_ctrl_slot: |
| 469 | cleanup_slots(ctrl); |
| 470 | err_out_free_ctrl_bus: |
| 471 | kfree(ctrl->pci_bus); |
| 472 | err_out_unmap_mmio_region: |
| 473 | ctrl->hpc_ops->release_ctlr(ctrl); |
| 474 | err_out_free_ctrl: |
| 475 | kfree(ctrl); |
| 476 | err_out_none: |
| 477 | return -ENODEV; |
| 478 | } |
| 479 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 480 | static int shpc_start_thread(void) |
| 481 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 482 | int retval = 0; |
Kenji Kaneshige | dfcd5f6 | 2006-01-26 09:56:53 +0900 | [diff] [blame^] | 483 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 484 | dbg("Initialize + Start the notification/polling mechanism \n"); |
| 485 | |
| 486 | retval = shpchp_event_start_thread(); |
| 487 | if (retval) { |
| 488 | dbg("shpchp_event_start_thread() failed\n"); |
| 489 | return retval; |
| 490 | } |
| 491 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 492 | return retval; |
| 493 | } |
| 494 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 495 | static void __exit unload_shpchpd(void) |
| 496 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 497 | struct controller *ctrl; |
| 498 | struct controller *tctrl; |
| 499 | |
| 500 | ctrl = shpchp_ctrl_list; |
| 501 | |
| 502 | while (ctrl) { |
rajesh.shah@intel.com | c2608a1 | 2005-10-13 12:05:44 -0700 | [diff] [blame] | 503 | shpchp_remove_ctrl_files(ctrl); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 504 | cleanup_slots(ctrl); |
| 505 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 506 | kfree (ctrl->pci_bus); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 507 | ctrl->hpc_ops->release_ctlr(ctrl); |
| 508 | |
| 509 | tctrl = ctrl; |
| 510 | ctrl = ctrl->next; |
| 511 | |
| 512 | kfree(tctrl); |
| 513 | } |
| 514 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 515 | /* Stop the notification mechanism */ |
| 516 | shpchp_event_stop_thread(); |
| 517 | |
| 518 | } |
| 519 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 520 | static struct pci_device_id shpcd_pci_tbl[] = { |
Kenji Kaneshige | dfcd5f6 | 2006-01-26 09:56:53 +0900 | [diff] [blame^] | 521 | {PCI_DEVICE_CLASS(((PCI_CLASS_BRIDGE_PCI << 8) | 0x00), ~0)}, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 522 | { /* end: all zeroes */ } |
| 523 | }; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 524 | MODULE_DEVICE_TABLE(pci, shpcd_pci_tbl); |
| 525 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 526 | static struct pci_driver shpc_driver = { |
| 527 | .name = SHPC_MODULE_NAME, |
| 528 | .id_table = shpcd_pci_tbl, |
| 529 | .probe = shpc_probe, |
| 530 | /* remove: shpc_remove_one, */ |
| 531 | }; |
| 532 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 533 | static int __init shpcd_init(void) |
| 534 | { |
| 535 | int retval = 0; |
| 536 | |
| 537 | #ifdef CONFIG_HOTPLUG_PCI_SHPC_POLL_EVENT_MODE |
| 538 | shpchp_poll_mode = 1; |
| 539 | #endif |
| 540 | |
| 541 | retval = shpc_start_thread(); |
| 542 | if (retval) |
| 543 | goto error_hpc_init; |
| 544 | |
rajesh.shah@intel.com | 424600f | 2005-10-13 12:05:38 -0700 | [diff] [blame] | 545 | retval = pci_register_driver(&shpc_driver); |
| 546 | dbg("%s: pci_register_driver = %d\n", __FUNCTION__, retval); |
| 547 | info(DRIVER_DESC " version: " DRIVER_VERSION "\n"); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 548 | |
| 549 | error_hpc_init: |
| 550 | if (retval) { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 551 | shpchp_event_stop_thread(); |
rajesh.shah@intel.com | dbd7a78 | 2005-10-13 12:05:36 -0700 | [diff] [blame] | 552 | } |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 553 | return retval; |
| 554 | } |
| 555 | |
| 556 | static void __exit shpcd_cleanup(void) |
| 557 | { |
| 558 | dbg("unload_shpchpd()\n"); |
| 559 | unload_shpchpd(); |
| 560 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 561 | pci_unregister_driver(&shpc_driver); |
| 562 | |
| 563 | info(DRIVER_DESC " version: " DRIVER_VERSION " unloaded\n"); |
| 564 | } |
| 565 | |
| 566 | module_init(shpcd_init); |
| 567 | module_exit(shpcd_cleanup); |