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Commit | Line | Data |
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1da177e4 LT |
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 | * | |
8cf4c195 | 26 | * Send feedback to <greg@kroah.com>, <kristen.c.accardi@intel.com> |
1da177e4 LT |
27 | * |
28 | */ | |
29 | ||
1da177e4 LT |
30 | #include <linux/module.h> |
31 | #include <linux/moduleparam.h> | |
32 | #include <linux/kernel.h> | |
33 | #include <linux/types.h> | |
5a0e3ad6 | 34 | #include <linux/slab.h> |
1da177e4 | 35 | #include <linux/pci.h> |
1da177e4 | 36 | #include "shpchp.h" |
1da177e4 LT |
37 | |
38 | /* Global variables */ | |
90ab5ee9 RR |
39 | bool shpchp_debug; |
40 | bool shpchp_poll_mode; | |
1da177e4 | 41 | int shpchp_poll_time; |
1da177e4 LT |
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 | ||
1da177e4 LT |
60 | static int set_attention_status (struct hotplug_slot *slot, u8 value); |
61 | static int enable_slot (struct hotplug_slot *slot); | |
62 | static int disable_slot (struct hotplug_slot *slot); | |
63 | static int get_power_status (struct hotplug_slot *slot, u8 *value); | |
64 | static int get_attention_status (struct hotplug_slot *slot, u8 *value); | |
65 | static int get_latch_status (struct hotplug_slot *slot, u8 *value); | |
66 | static int get_adapter_status (struct hotplug_slot *slot, u8 *value); | |
1da177e4 LT |
67 | |
68 | static struct hotplug_slot_ops shpchp_hotplug_slot_ops = { | |
1da177e4 LT |
69 | .set_attention_status = set_attention_status, |
70 | .enable_slot = enable_slot, | |
71 | .disable_slot = disable_slot, | |
72 | .get_power_status = get_power_status, | |
73 | .get_attention_status = get_attention_status, | |
74 | .get_latch_status = get_latch_status, | |
75 | .get_adapter_status = get_adapter_status, | |
1da177e4 LT |
76 | }; |
77 | ||
78 | /** | |
79 | * release_slot - free up the memory used by a slot | |
80 | * @hotplug_slot: slot to free | |
81 | */ | |
82 | static void release_slot(struct hotplug_slot *hotplug_slot) | |
83 | { | |
ee17fd93 | 84 | struct slot *slot = hotplug_slot->private; |
1da177e4 | 85 | |
be7bce25 | 86 | ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", |
f98ca311 | 87 | __func__, slot_name(slot)); |
1da177e4 LT |
88 | |
89 | kfree(slot->hotplug_slot->info); | |
1da177e4 LT |
90 | kfree(slot->hotplug_slot); |
91 | kfree(slot); | |
92 | } | |
93 | ||
94 | static int init_slots(struct controller *ctrl) | |
95 | { | |
926030f6 KK |
96 | struct slot *slot; |
97 | struct hotplug_slot *hotplug_slot; | |
98 | struct hotplug_slot_info *info; | |
66f17055 | 99 | char name[SLOT_NAME_SIZE]; |
83d05710 | 100 | int retval; |
5fe6cc60 | 101 | int i; |
926030f6 KK |
102 | |
103 | for (i = 0; i < ctrl->num_slots; i++) { | |
57c95c0d | 104 | slot = kzalloc(sizeof(*slot), GFP_KERNEL); |
83d05710 JL |
105 | if (!slot) { |
106 | retval = -ENOMEM; | |
1da177e4 | 107 | goto error; |
83d05710 | 108 | } |
1da177e4 | 109 | |
57c95c0d | 110 | hotplug_slot = kzalloc(sizeof(*hotplug_slot), GFP_KERNEL); |
83d05710 JL |
111 | if (!hotplug_slot) { |
112 | retval = -ENOMEM; | |
1da177e4 | 113 | goto error_slot; |
83d05710 | 114 | } |
926030f6 | 115 | slot->hotplug_slot = hotplug_slot; |
1da177e4 | 116 | |
57c95c0d | 117 | info = kzalloc(sizeof(*info), GFP_KERNEL); |
83d05710 JL |
118 | if (!info) { |
119 | retval = -ENOMEM; | |
1da177e4 | 120 | goto error_hpslot; |
83d05710 | 121 | } |
926030f6 KK |
122 | hotplug_slot->info = info; |
123 | ||
926030f6 | 124 | slot->hp_slot = i; |
926030f6 | 125 | slot->ctrl = ctrl; |
227b84c7 | 126 | slot->bus = ctrl->pci_dev->subordinate->number; |
926030f6 KK |
127 | slot->device = ctrl->slot_device_offset + i; |
128 | slot->hpc_ops = ctrl->hpc_ops; | |
6f39be2e | 129 | slot->number = ctrl->first_slot + (ctrl->slot_num_inc * i); |
f652e7d2 | 130 | |
d8537548 | 131 | slot->wq = alloc_workqueue("shpchp-%d", 0, 0, slot->number); |
f652e7d2 BH |
132 | if (!slot->wq) { |
133 | retval = -ENOMEM; | |
134 | goto error_info; | |
135 | } | |
136 | ||
a246fa4e | 137 | mutex_init(&slot->lock); |
e325e1f0 | 138 | INIT_DELAYED_WORK(&slot->work, shpchp_queue_pushbutton_work); |
1da177e4 LT |
139 | |
140 | /* register this slot with the hotplug pci core */ | |
926030f6 KK |
141 | hotplug_slot->private = slot; |
142 | hotplug_slot->release = &release_slot; | |
66f17055 | 143 | snprintf(name, SLOT_NAME_SIZE, "%d", slot->number); |
926030f6 KK |
144 | hotplug_slot->ops = &shpchp_hotplug_slot_ops; |
145 | ||
be7bce25 TI |
146 | ctrl_dbg(ctrl, "Registering domain:bus:dev=%04x:%02x:%02x " |
147 | "hp_slot=%x sun=%x slot_device_offset=%x\n", | |
148 | pci_domain_nr(ctrl->pci_dev->subordinate), | |
149 | slot->bus, slot->device, slot->hp_slot, slot->number, | |
150 | ctrl->slot_device_offset); | |
f46753c5 | 151 | retval = pci_hp_register(slot->hotplug_slot, |
66f17055 | 152 | ctrl->pci_dev->subordinate, slot->device, name); |
926030f6 | 153 | if (retval) { |
f98ca311 TI |
154 | ctrl_err(ctrl, "pci_hp_register failed with error %d\n", |
155 | retval); | |
f652e7d2 | 156 | goto error_slotwq; |
1da177e4 LT |
157 | } |
158 | ||
66f17055 AC |
159 | get_power_status(hotplug_slot, &info->power_status); |
160 | get_attention_status(hotplug_slot, &info->attention_status); | |
161 | get_latch_status(hotplug_slot, &info->latch_status); | |
162 | get_adapter_status(hotplug_slot, &info->adapter_status); | |
163 | ||
5b1a960d | 164 | list_add(&slot->slot_list, &ctrl->slot_list); |
1da177e4 LT |
165 | } |
166 | ||
167 | return 0; | |
f652e7d2 BH |
168 | error_slotwq: |
169 | destroy_workqueue(slot->wq); | |
1da177e4 | 170 | error_info: |
926030f6 | 171 | kfree(info); |
1da177e4 | 172 | error_hpslot: |
926030f6 | 173 | kfree(hotplug_slot); |
1da177e4 | 174 | error_slot: |
926030f6 | 175 | kfree(slot); |
1da177e4 | 176 | error: |
926030f6 | 177 | return retval; |
1da177e4 LT |
178 | } |
179 | ||
f7391f53 | 180 | void cleanup_slots(struct controller *ctrl) |
1da177e4 | 181 | { |
5b1a960d KK |
182 | struct list_head *tmp; |
183 | struct list_head *next; | |
184 | struct slot *slot; | |
1da177e4 | 185 | |
5b1a960d KK |
186 | list_for_each_safe(tmp, next, &ctrl->slot_list) { |
187 | slot = list_entry(tmp, struct slot, slot_list); | |
188 | list_del(&slot->slot_list); | |
f7391f53 | 189 | cancel_delayed_work(&slot->work); |
f652e7d2 | 190 | destroy_workqueue(slot->wq); |
5b1a960d | 191 | pci_hp_deregister(slot->hotplug_slot); |
1da177e4 LT |
192 | } |
193 | } | |
194 | ||
1da177e4 LT |
195 | /* |
196 | * set_attention_status - Turns the Amber LED for a slot on, off or blink | |
197 | */ | |
198 | static int set_attention_status (struct hotplug_slot *hotplug_slot, u8 status) | |
199 | { | |
8352e04e | 200 | struct slot *slot = get_slot(hotplug_slot); |
1da177e4 | 201 | |
be7bce25 | 202 | ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", |
f98ca311 | 203 | __func__, slot_name(slot)); |
1da177e4 LT |
204 | |
205 | hotplug_slot->info->attention_status = status; | |
206 | slot->hpc_ops->set_attention_status(slot, status); | |
207 | ||
208 | return 0; | |
209 | } | |
210 | ||
1da177e4 LT |
211 | static int enable_slot (struct hotplug_slot *hotplug_slot) |
212 | { | |
8352e04e | 213 | struct slot *slot = get_slot(hotplug_slot); |
1da177e4 | 214 | |
be7bce25 | 215 | ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", |
f98ca311 | 216 | __func__, slot_name(slot)); |
1da177e4 | 217 | |
a246fa4e | 218 | return shpchp_sysfs_enable_slot(slot); |
1da177e4 LT |
219 | } |
220 | ||
1da177e4 LT |
221 | static int disable_slot (struct hotplug_slot *hotplug_slot) |
222 | { | |
8352e04e | 223 | struct slot *slot = get_slot(hotplug_slot); |
1da177e4 | 224 | |
be7bce25 | 225 | ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", |
f98ca311 | 226 | __func__, slot_name(slot)); |
1da177e4 | 227 | |
a246fa4e | 228 | return shpchp_sysfs_disable_slot(slot); |
1da177e4 LT |
229 | } |
230 | ||
231 | static int get_power_status (struct hotplug_slot *hotplug_slot, u8 *value) | |
232 | { | |
8352e04e | 233 | struct slot *slot = get_slot(hotplug_slot); |
1da177e4 LT |
234 | int retval; |
235 | ||
be7bce25 | 236 | ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", |
f98ca311 | 237 | __func__, slot_name(slot)); |
1da177e4 LT |
238 | |
239 | retval = slot->hpc_ops->get_power_status(slot, value); | |
240 | if (retval < 0) | |
241 | *value = hotplug_slot->info->power_status; | |
242 | ||
243 | return 0; | |
244 | } | |
245 | ||
246 | static int get_attention_status (struct hotplug_slot *hotplug_slot, u8 *value) | |
247 | { | |
8352e04e | 248 | struct slot *slot = get_slot(hotplug_slot); |
1da177e4 LT |
249 | int retval; |
250 | ||
be7bce25 | 251 | ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", |
f98ca311 | 252 | __func__, slot_name(slot)); |
1da177e4 LT |
253 | |
254 | retval = slot->hpc_ops->get_attention_status(slot, value); | |
255 | if (retval < 0) | |
256 | *value = hotplug_slot->info->attention_status; | |
257 | ||
258 | return 0; | |
259 | } | |
260 | ||
261 | static int get_latch_status (struct hotplug_slot *hotplug_slot, u8 *value) | |
262 | { | |
8352e04e | 263 | struct slot *slot = get_slot(hotplug_slot); |
1da177e4 LT |
264 | int retval; |
265 | ||
be7bce25 | 266 | ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", |
f98ca311 | 267 | __func__, slot_name(slot)); |
1da177e4 LT |
268 | |
269 | retval = slot->hpc_ops->get_latch_status(slot, value); | |
270 | if (retval < 0) | |
271 | *value = hotplug_slot->info->latch_status; | |
272 | ||
273 | return 0; | |
274 | } | |
275 | ||
276 | static int get_adapter_status (struct hotplug_slot *hotplug_slot, u8 *value) | |
277 | { | |
8352e04e | 278 | struct slot *slot = get_slot(hotplug_slot); |
1da177e4 LT |
279 | int retval; |
280 | ||
be7bce25 | 281 | ctrl_dbg(slot->ctrl, "%s: physical_slot = %s\n", |
f98ca311 | 282 | __func__, slot_name(slot)); |
1da177e4 LT |
283 | |
284 | retval = slot->hpc_ops->get_adapter_status(slot, value); | |
285 | if (retval < 0) | |
286 | *value = hotplug_slot->info->adapter_status; | |
287 | ||
288 | return 0; | |
289 | } | |
290 | ||
1410dc1c RS |
291 | static int is_shpc_capable(struct pci_dev *dev) |
292 | { | |
4cac2eb1 BH |
293 | if (dev->vendor == PCI_VENDOR_ID_AMD && |
294 | dev->device == PCI_DEVICE_ID_AMD_GOLAM_7450) | |
ac9c052d KK |
295 | return 1; |
296 | if (!pci_find_capability(dev, PCI_CAP_ID_SHPC)) | |
297 | return 0; | |
298 | if (get_hp_hw_control_from_firmware(dev)) | |
299 | return 0; | |
300 | return 1; | |
1410dc1c RS |
301 | } |
302 | ||
1da177e4 LT |
303 | static int shpc_probe(struct pci_dev *pdev, const struct pci_device_id *ent) |
304 | { | |
305 | int rc; | |
306 | struct controller *ctrl; | |
1da177e4 | 307 | |
1410dc1c RS |
308 | if (!is_shpc_capable(pdev)) |
309 | return -ENODEV; | |
310 | ||
57c95c0d | 311 | ctrl = kzalloc(sizeof(*ctrl), GFP_KERNEL); |
1da177e4 | 312 | if (!ctrl) { |
be7bce25 | 313 | dev_err(&pdev->dev, "%s: Out of memory\n", __func__); |
1da177e4 LT |
314 | goto err_out_none; |
315 | } | |
5b1a960d | 316 | INIT_LIST_HEAD(&ctrl->slot_list); |
1da177e4 | 317 | |
ee138334 | 318 | rc = shpc_init(ctrl, pdev); |
1da177e4 | 319 | if (rc) { |
be7bce25 | 320 | ctrl_dbg(ctrl, "Controller initialization failed\n"); |
1da177e4 LT |
321 | goto err_out_free_ctrl; |
322 | } | |
323 | ||
1da177e4 LT |
324 | pci_set_drvdata(pdev, ctrl); |
325 | ||
1da177e4 LT |
326 | /* Setup the slot information structures */ |
327 | rc = init_slots(ctrl); | |
328 | if (rc) { | |
be7bce25 | 329 | ctrl_err(ctrl, "Slot initialization failed\n"); |
f7391f53 | 330 | goto err_out_release_ctlr; |
1da177e4 LT |
331 | } |
332 | ||
e1b95dc6 GKH |
333 | rc = shpchp_create_ctrl_files(ctrl); |
334 | if (rc) | |
335 | goto err_cleanup_slots; | |
1da177e4 LT |
336 | |
337 | return 0; | |
338 | ||
e1b95dc6 GKH |
339 | err_cleanup_slots: |
340 | cleanup_slots(ctrl); | |
f7391f53 | 341 | err_out_release_ctlr: |
1da177e4 LT |
342 | ctrl->hpc_ops->release_ctlr(ctrl); |
343 | err_out_free_ctrl: | |
344 | kfree(ctrl); | |
345 | err_out_none: | |
346 | return -ENODEV; | |
347 | } | |
348 | ||
e6b82b13 | 349 | static void shpc_remove(struct pci_dev *dev) |
1da177e4 | 350 | { |
e6b82b13 | 351 | struct controller *ctrl = pci_get_drvdata(dev); |
1da177e4 | 352 | |
e6b82b13 KK |
353 | shpchp_remove_ctrl_files(ctrl); |
354 | ctrl->hpc_ops->release_ctlr(ctrl); | |
355 | kfree(ctrl); | |
1da177e4 LT |
356 | } |
357 | ||
1da177e4 | 358 | static struct pci_device_id shpcd_pci_tbl[] = { |
dfcd5f68 | 359 | {PCI_DEVICE_CLASS(((PCI_CLASS_BRIDGE_PCI << 8) | 0x00), ~0)}, |
1da177e4 LT |
360 | { /* end: all zeroes */ } |
361 | }; | |
1da177e4 LT |
362 | MODULE_DEVICE_TABLE(pci, shpcd_pci_tbl); |
363 | ||
1da177e4 LT |
364 | static struct pci_driver shpc_driver = { |
365 | .name = SHPC_MODULE_NAME, | |
366 | .id_table = shpcd_pci_tbl, | |
367 | .probe = shpc_probe, | |
e6b82b13 | 368 | .remove = shpc_remove, |
1da177e4 LT |
369 | }; |
370 | ||
1da177e4 LT |
371 | static int __init shpcd_init(void) |
372 | { | |
f652e7d2 | 373 | int retval; |
e24dcbef | 374 | |
424600f9 | 375 | retval = pci_register_driver(&shpc_driver); |
66bef8c0 | 376 | dbg("%s: pci_register_driver = %d\n", __func__, retval); |
424600f9 | 377 | info(DRIVER_DESC " version: " DRIVER_VERSION "\n"); |
f652e7d2 | 378 | |
1da177e4 LT |
379 | return retval; |
380 | } | |
381 | ||
382 | static void __exit shpcd_cleanup(void) | |
383 | { | |
384 | dbg("unload_shpchpd()\n"); | |
1da177e4 | 385 | pci_unregister_driver(&shpc_driver); |
1da177e4 LT |
386 | info(DRIVER_DESC " version: " DRIVER_VERSION " unloaded\n"); |
387 | } | |
388 | ||
389 | module_init(shpcd_init); | |
390 | module_exit(shpcd_cleanup); |