Commit | Line | Data |
---|---|---|
1da177e4 LT |
1 | /* |
2 | * Compaq 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 | * | |
8 | * All rights reserved. | |
9 | * | |
10 | * This program is free software; you can redistribute it and/or modify | |
11 | * it under the terms of the GNU General Public License as published by | |
12 | * the Free Software Foundation; either version 2 of the License, or (at | |
13 | * your option) any later version. | |
14 | * | |
15 | * This program is distributed in the hope that it will be useful, but | |
16 | * WITHOUT ANY WARRANTY; without even the implied warranty of | |
17 | * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or | |
18 | * NON INFRINGEMENT. See the GNU General Public License for more | |
19 | * details. | |
20 | * | |
21 | * You should have received a copy of the GNU General Public License | |
22 | * along with this program; if not, write to the Free Software | |
23 | * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. | |
24 | * | |
25 | * Send feedback to <greg@kroah.com> | |
26 | * | |
27 | * Jan 12, 2003 - Added 66/100/133MHz PCI-X support, | |
28 | * Torben Mathiasen <torben.mathiasen@hp.com> | |
29 | * | |
30 | */ | |
31 | ||
1da177e4 LT |
32 | #include <linux/module.h> |
33 | #include <linux/moduleparam.h> | |
34 | #include <linux/kernel.h> | |
35 | #include <linux/types.h> | |
36 | #include <linux/proc_fs.h> | |
37 | #include <linux/slab.h> | |
38 | #include <linux/workqueue.h> | |
39 | #include <linux/pci.h> | |
7a54f25c | 40 | #include <linux/pci_hotplug.h> |
1da177e4 LT |
41 | #include <linux/init.h> |
42 | #include <linux/interrupt.h> | |
43 | ||
44 | #include <asm/uaccess.h> | |
45 | ||
46 | #include "cpqphp.h" | |
47 | #include "cpqphp_nvram.h" | |
fb9aa6f1 | 48 | #include "../../../arch/x86/pci/pci.h" /* horrible hack showing how processor dependent we are... */ |
1da177e4 LT |
49 | |
50 | ||
51 | /* Global variables */ | |
52 | int cpqhp_debug; | |
53 | int cpqhp_legacy_mode; | |
54 | struct controller *cpqhp_ctrl_list; /* = NULL */ | |
55 | struct pci_func *cpqhp_slot_list[256]; | |
56 | ||
57 | /* local variables */ | |
58 | static void __iomem *smbios_table; | |
59 | static void __iomem *smbios_start; | |
60 | static void __iomem *cpqhp_rom_start; | |
61 | static int power_mode; | |
62 | static int debug; | |
4002307d | 63 | static int initialized; |
1da177e4 LT |
64 | |
65 | #define DRIVER_VERSION "0.9.8" | |
66 | #define DRIVER_AUTHOR "Dan Zink <dan.zink@compaq.com>, Greg Kroah-Hartman <greg@kroah.com>" | |
67 | #define DRIVER_DESC "Compaq Hot Plug PCI Controller Driver" | |
68 | ||
69 | MODULE_AUTHOR(DRIVER_AUTHOR); | |
70 | MODULE_DESCRIPTION(DRIVER_DESC); | |
71 | MODULE_LICENSE("GPL"); | |
72 | ||
73 | module_param(power_mode, bool, 0644); | |
74 | MODULE_PARM_DESC(power_mode, "Power mode enabled or not"); | |
75 | ||
76 | module_param(debug, bool, 0644); | |
77 | MODULE_PARM_DESC(debug, "Debugging mode enabled or not"); | |
78 | ||
79 | #define CPQHPC_MODULE_MINOR 208 | |
80 | ||
81 | static int one_time_init (void); | |
82 | static int set_attention_status (struct hotplug_slot *slot, u8 value); | |
83 | static int process_SI (struct hotplug_slot *slot); | |
84 | static int process_SS (struct hotplug_slot *slot); | |
85 | static int hardware_test (struct hotplug_slot *slot, u32 value); | |
86 | static int get_power_status (struct hotplug_slot *slot, u8 *value); | |
87 | static int get_attention_status (struct hotplug_slot *slot, u8 *value); | |
88 | static int get_latch_status (struct hotplug_slot *slot, u8 *value); | |
89 | static int get_adapter_status (struct hotplug_slot *slot, u8 *value); | |
90 | static int get_max_bus_speed (struct hotplug_slot *slot, enum pci_bus_speed *value); | |
91 | static int get_cur_bus_speed (struct hotplug_slot *slot, enum pci_bus_speed *value); | |
92 | ||
93 | static struct hotplug_slot_ops cpqphp_hotplug_slot_ops = { | |
94 | .owner = THIS_MODULE, | |
95 | .set_attention_status = set_attention_status, | |
96 | .enable_slot = process_SI, | |
97 | .disable_slot = process_SS, | |
98 | .hardware_test = hardware_test, | |
99 | .get_power_status = get_power_status, | |
100 | .get_attention_status = get_attention_status, | |
101 | .get_latch_status = get_latch_status, | |
102 | .get_adapter_status = get_adapter_status, | |
103 | .get_max_bus_speed = get_max_bus_speed, | |
104 | .get_cur_bus_speed = get_cur_bus_speed, | |
105 | }; | |
106 | ||
107 | ||
108 | static inline int is_slot64bit(struct slot *slot) | |
109 | { | |
110 | return (readb(slot->p_sm_slot + SMBIOS_SLOT_WIDTH) == 0x06) ? 1 : 0; | |
111 | } | |
112 | ||
113 | static inline int is_slot66mhz(struct slot *slot) | |
114 | { | |
115 | return (readb(slot->p_sm_slot + SMBIOS_SLOT_TYPE) == 0x0E) ? 1 : 0; | |
116 | } | |
117 | ||
118 | /** | |
119 | * detect_SMBIOS_pointer - find the System Management BIOS Table in mem region. | |
1da177e4 LT |
120 | * @begin: begin pointer for region to be scanned. |
121 | * @end: end pointer for region to be scanned. | |
122 | * | |
26e6c66e | 123 | * Returns pointer to the head of the SMBIOS tables (or %NULL). |
1da177e4 LT |
124 | */ |
125 | static void __iomem * detect_SMBIOS_pointer(void __iomem *begin, void __iomem *end) | |
126 | { | |
127 | void __iomem *fp; | |
128 | void __iomem *endp; | |
129 | u8 temp1, temp2, temp3, temp4; | |
130 | int status = 0; | |
131 | ||
132 | endp = (end - sizeof(u32) + 1); | |
133 | ||
134 | for (fp = begin; fp <= endp; fp += 16) { | |
135 | temp1 = readb(fp); | |
136 | temp2 = readb(fp+1); | |
137 | temp3 = readb(fp+2); | |
138 | temp4 = readb(fp+3); | |
139 | if (temp1 == '_' && | |
140 | temp2 == 'S' && | |
141 | temp3 == 'M' && | |
142 | temp4 == '_') { | |
143 | status = 1; | |
144 | break; | |
145 | } | |
146 | } | |
147 | ||
148 | if (!status) | |
149 | fp = NULL; | |
150 | ||
151 | dbg("Discovered SMBIOS Entry point at %p\n", fp); | |
152 | ||
153 | return fp; | |
154 | } | |
155 | ||
156 | /** | |
157 | * init_SERR - Initializes the per slot SERR generation. | |
26e6c66e | 158 | * @ctrl: controller to use |
1da177e4 LT |
159 | * |
160 | * For unexpected switch opens | |
1da177e4 LT |
161 | */ |
162 | static int init_SERR(struct controller * ctrl) | |
163 | { | |
164 | u32 tempdword; | |
165 | u32 number_of_slots; | |
166 | u8 physical_slot; | |
167 | ||
168 | if (!ctrl) | |
169 | return 1; | |
170 | ||
171 | tempdword = ctrl->first_slot; | |
172 | ||
173 | number_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0F; | |
174 | // Loop through slots | |
175 | while (number_of_slots) { | |
176 | physical_slot = tempdword; | |
177 | writeb(0, ctrl->hpc_reg + SLOT_SERR); | |
178 | tempdword++; | |
179 | number_of_slots--; | |
180 | } | |
181 | ||
182 | return 0; | |
183 | } | |
184 | ||
185 | ||
186 | /* nice debugging output */ | |
187 | static int pci_print_IRQ_route (void) | |
188 | { | |
189 | struct irq_routing_table *routing_table; | |
190 | int len; | |
191 | int loop; | |
192 | ||
193 | u8 tbus, tdevice, tslot; | |
194 | ||
195 | routing_table = pcibios_get_irq_routing_table(); | |
196 | if (routing_table == NULL) { | |
197 | err("No BIOS Routing Table??? Not good\n"); | |
198 | return -ENOMEM; | |
199 | } | |
200 | ||
201 | len = (routing_table->size - sizeof(struct irq_routing_table)) / | |
202 | sizeof(struct irq_info); | |
203 | // Make sure I got at least one entry | |
204 | if (len == 0) { | |
205 | kfree(routing_table); | |
206 | return -1; | |
207 | } | |
208 | ||
209 | dbg("bus dev func slot\n"); | |
210 | ||
211 | for (loop = 0; loop < len; ++loop) { | |
212 | tbus = routing_table->slots[loop].bus; | |
213 | tdevice = routing_table->slots[loop].devfn; | |
214 | tslot = routing_table->slots[loop].slot; | |
215 | dbg("%d %d %d %d\n", tbus, tdevice >> 3, tdevice & 0x7, tslot); | |
216 | ||
217 | } | |
218 | kfree(routing_table); | |
219 | return 0; | |
220 | } | |
221 | ||
222 | ||
223 | /** | |
224 | * get_subsequent_smbios_entry: get the next entry from bios table. | |
26e6c66e RD |
225 | * @smbios_start: where to start in the SMBIOS table |
226 | * @smbios_table: location of the SMBIOS table | |
1da177e4 LT |
227 | * @curr: %NULL or pointer to previously returned structure |
228 | * | |
26e6c66e RD |
229 | * Gets the first entry if previous == NULL; |
230 | * otherwise, returns the next entry. | |
231 | * Uses global SMBIOS Table pointer. | |
232 | * | |
233 | * Returns a pointer to an SMBIOS structure or NULL if none found. | |
1da177e4 LT |
234 | */ |
235 | static void __iomem *get_subsequent_smbios_entry(void __iomem *smbios_start, | |
236 | void __iomem *smbios_table, | |
237 | void __iomem *curr) | |
238 | { | |
239 | u8 bail = 0; | |
240 | u8 previous_byte = 1; | |
241 | void __iomem *p_temp; | |
242 | void __iomem *p_max; | |
243 | ||
244 | if (!smbios_table || !curr) | |
245 | return(NULL); | |
246 | ||
247 | // set p_max to the end of the table | |
248 | p_max = smbios_start + readw(smbios_table + ST_LENGTH); | |
249 | ||
250 | p_temp = curr; | |
251 | p_temp += readb(curr + SMBIOS_GENERIC_LENGTH); | |
252 | ||
253 | while ((p_temp < p_max) && !bail) { | |
254 | /* Look for the double NULL terminator | |
255 | * The first condition is the previous byte | |
256 | * and the second is the curr */ | |
257 | if (!previous_byte && !(readb(p_temp))) { | |
258 | bail = 1; | |
259 | } | |
260 | ||
261 | previous_byte = readb(p_temp); | |
262 | p_temp++; | |
263 | } | |
264 | ||
265 | if (p_temp < p_max) { | |
266 | return p_temp; | |
267 | } else { | |
268 | return NULL; | |
269 | } | |
270 | } | |
271 | ||
272 | ||
273 | /** | |
26e6c66e RD |
274 | * get_SMBIOS_entry - return the requested SMBIOS entry or %NULL |
275 | * @smbios_start: where to start in the SMBIOS table | |
276 | * @smbios_table: location of the SMBIOS table | |
277 | * @type: SMBIOS structure type to be returned | |
1da177e4 LT |
278 | * @previous: %NULL or pointer to previously returned structure |
279 | * | |
26e6c66e | 280 | * Gets the first entry of the specified type if previous == %NULL; |
1da177e4 | 281 | * Otherwise, returns the next entry of the given type. |
26e6c66e RD |
282 | * Uses global SMBIOS Table pointer. |
283 | * Uses get_subsequent_smbios_entry. | |
1da177e4 | 284 | * |
26e6c66e | 285 | * Returns a pointer to an SMBIOS structure or %NULL if none found. |
1da177e4 LT |
286 | */ |
287 | static void __iomem *get_SMBIOS_entry(void __iomem *smbios_start, | |
288 | void __iomem *smbios_table, | |
289 | u8 type, | |
290 | void __iomem *previous) | |
291 | { | |
292 | if (!smbios_table) | |
293 | return NULL; | |
294 | ||
295 | if (!previous) { | |
296 | previous = smbios_start; | |
297 | } else { | |
298 | previous = get_subsequent_smbios_entry(smbios_start, | |
299 | smbios_table, previous); | |
300 | } | |
301 | ||
302 | while (previous) { | |
303 | if (readb(previous + SMBIOS_GENERIC_TYPE) != type) { | |
304 | previous = get_subsequent_smbios_entry(smbios_start, | |
305 | smbios_table, previous); | |
306 | } else { | |
307 | break; | |
308 | } | |
309 | } | |
310 | ||
311 | return previous; | |
312 | } | |
313 | ||
314 | static void release_slot(struct hotplug_slot *hotplug_slot) | |
315 | { | |
316 | struct slot *slot = hotplug_slot->private; | |
317 | ||
30ac7acd | 318 | dbg("%s - physical_slot = %s\n", __func__, slot_name(slot)); |
1da177e4 LT |
319 | |
320 | kfree(slot->hotplug_slot->info); | |
1da177e4 LT |
321 | kfree(slot->hotplug_slot); |
322 | kfree(slot); | |
323 | } | |
324 | ||
30ac7acd AC |
325 | #define SLOT_NAME_SIZE 10 |
326 | ||
1da177e4 LT |
327 | static int ctrl_slot_setup(struct controller *ctrl, |
328 | void __iomem *smbios_start, | |
329 | void __iomem *smbios_table) | |
330 | { | |
efbf62e9 JJ |
331 | struct slot *slot; |
332 | struct hotplug_slot *hotplug_slot; | |
333 | struct hotplug_slot_info *hotplug_slot_info; | |
1da177e4 LT |
334 | u8 number_of_slots; |
335 | u8 slot_device; | |
336 | u8 slot_number; | |
337 | u8 ctrl_slot; | |
338 | u32 tempdword; | |
30ac7acd | 339 | char name[SLOT_NAME_SIZE]; |
1da177e4 LT |
340 | void __iomem *slot_entry= NULL; |
341 | int result = -ENOMEM; | |
342 | ||
66bef8c0 | 343 | dbg("%s\n", __func__); |
1da177e4 LT |
344 | |
345 | tempdword = readl(ctrl->hpc_reg + INT_INPUT_CLEAR); | |
346 | ||
347 | number_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0F; | |
348 | slot_device = readb(ctrl->hpc_reg + SLOT_MASK) >> 4; | |
349 | slot_number = ctrl->first_slot; | |
350 | ||
351 | while (number_of_slots) { | |
f5afe806 | 352 | slot = kzalloc(sizeof(*slot), GFP_KERNEL); |
efbf62e9 | 353 | if (!slot) |
1da177e4 LT |
354 | goto error; |
355 | ||
f5afe806 | 356 | slot->hotplug_slot = kzalloc(sizeof(*(slot->hotplug_slot)), |
1da177e4 | 357 | GFP_KERNEL); |
efbf62e9 | 358 | if (!slot->hotplug_slot) |
1da177e4 | 359 | goto error_slot; |
efbf62e9 | 360 | hotplug_slot = slot->hotplug_slot; |
1da177e4 | 361 | |
efbf62e9 | 362 | hotplug_slot->info = |
f5afe806 | 363 | kzalloc(sizeof(*(hotplug_slot->info)), |
1da177e4 | 364 | GFP_KERNEL); |
efbf62e9 | 365 | if (!hotplug_slot->info) |
1da177e4 | 366 | goto error_hpslot; |
efbf62e9 | 367 | hotplug_slot_info = hotplug_slot->info; |
1da177e4 | 368 | |
efbf62e9 JJ |
369 | slot->ctrl = ctrl; |
370 | slot->bus = ctrl->bus; | |
371 | slot->device = slot_device; | |
372 | slot->number = slot_number; | |
30ac7acd | 373 | dbg("slot->number = %u\n", slot->number); |
1da177e4 LT |
374 | |
375 | slot_entry = get_SMBIOS_entry(smbios_start, smbios_table, 9, | |
376 | slot_entry); | |
377 | ||
efbf62e9 JJ |
378 | while (slot_entry && (readw(slot_entry + SMBIOS_SLOT_NUMBER) != |
379 | slot->number)) { | |
1da177e4 LT |
380 | slot_entry = get_SMBIOS_entry(smbios_start, |
381 | smbios_table, 9, slot_entry); | |
382 | } | |
383 | ||
efbf62e9 | 384 | slot->p_sm_slot = slot_entry; |
1da177e4 | 385 | |
efbf62e9 JJ |
386 | init_timer(&slot->task_event); |
387 | slot->task_event.expires = jiffies + 5 * HZ; | |
388 | slot->task_event.function = cpqhp_pushbutton_thread; | |
1da177e4 LT |
389 | |
390 | //FIXME: these capabilities aren't used but if they are | |
391 | // they need to be correctly implemented | |
efbf62e9 JJ |
392 | slot->capabilities |= PCISLOT_REPLACE_SUPPORTED; |
393 | slot->capabilities |= PCISLOT_INTERLOCK_SUPPORTED; | |
1da177e4 | 394 | |
efbf62e9 JJ |
395 | if (is_slot64bit(slot)) |
396 | slot->capabilities |= PCISLOT_64_BIT_SUPPORTED; | |
397 | if (is_slot66mhz(slot)) | |
398 | slot->capabilities |= PCISLOT_66_MHZ_SUPPORTED; | |
1da177e4 | 399 | if (ctrl->speed == PCI_SPEED_66MHz) |
efbf62e9 | 400 | slot->capabilities |= PCISLOT_66_MHZ_OPERATION; |
1da177e4 | 401 | |
efbf62e9 JJ |
402 | ctrl_slot = |
403 | slot_device - (readb(ctrl->hpc_reg + SLOT_MASK) >> 4); | |
1da177e4 LT |
404 | |
405 | // Check presence | |
efbf62e9 JJ |
406 | slot->capabilities |= |
407 | ((((~tempdword) >> 23) | | |
408 | ((~tempdword) >> 15)) >> ctrl_slot) & 0x02; | |
1da177e4 | 409 | // Check the switch state |
efbf62e9 JJ |
410 | slot->capabilities |= |
411 | ((~tempdword & 0xFF) >> ctrl_slot) & 0x01; | |
1da177e4 | 412 | // Check the slot enable |
efbf62e9 JJ |
413 | slot->capabilities |= |
414 | ((read_slot_enable(ctrl) << 2) >> ctrl_slot) & 0x04; | |
1da177e4 LT |
415 | |
416 | /* register this slot with the hotplug pci core */ | |
efbf62e9 JJ |
417 | hotplug_slot->release = &release_slot; |
418 | hotplug_slot->private = slot; | |
30ac7acd | 419 | snprintf(name, SLOT_NAME_SIZE, "%u", slot->number); |
efbf62e9 | 420 | hotplug_slot->ops = &cpqphp_hotplug_slot_ops; |
30ac7acd | 421 | |
efbf62e9 JJ |
422 | hotplug_slot_info->power_status = get_slot_enabled(ctrl, slot); |
423 | hotplug_slot_info->attention_status = | |
424 | cpq_get_attention_status(ctrl, slot); | |
425 | hotplug_slot_info->latch_status = | |
426 | cpq_get_latch_status(ctrl, slot); | |
427 | hotplug_slot_info->adapter_status = | |
428 | get_presence_status(ctrl, slot); | |
1da177e4 | 429 | |
efbf62e9 | 430 | dbg("registering bus %d, dev %d, number %d, " |
1da177e4 | 431 | "ctrl->slot_device_offset %d, slot %d\n", |
efbf62e9 JJ |
432 | slot->bus, slot->device, |
433 | slot->number, ctrl->slot_device_offset, | |
1da177e4 | 434 | slot_number); |
f46753c5 | 435 | result = pci_hp_register(hotplug_slot, |
d2174c3c | 436 | ctrl->pci_dev->bus, |
1359f270 | 437 | slot->device, |
30ac7acd | 438 | name); |
1da177e4 | 439 | if (result) { |
efbf62e9 | 440 | err("pci_hp_register failed with error %d\n", result); |
30ac7acd | 441 | goto error_info; |
1da177e4 LT |
442 | } |
443 | ||
efbf62e9 JJ |
444 | slot->next = ctrl->slot; |
445 | ctrl->slot = slot; | |
1da177e4 LT |
446 | |
447 | number_of_slots--; | |
448 | slot_device++; | |
449 | slot_number++; | |
450 | } | |
451 | ||
452 | return 0; | |
1da177e4 | 453 | error_info: |
efbf62e9 | 454 | kfree(hotplug_slot_info); |
1da177e4 | 455 | error_hpslot: |
efbf62e9 | 456 | kfree(hotplug_slot); |
1da177e4 | 457 | error_slot: |
efbf62e9 | 458 | kfree(slot); |
1da177e4 LT |
459 | error: |
460 | return result; | |
461 | } | |
462 | ||
463 | static int ctrl_slot_cleanup (struct controller * ctrl) | |
464 | { | |
465 | struct slot *old_slot, *next_slot; | |
466 | ||
467 | old_slot = ctrl->slot; | |
468 | ctrl->slot = NULL; | |
469 | ||
470 | while (old_slot) { | |
471 | /* memory will be freed by the release_slot callback */ | |
472 | next_slot = old_slot->next; | |
473 | pci_hp_deregister (old_slot->hotplug_slot); | |
474 | old_slot = next_slot; | |
475 | } | |
476 | ||
9f3f4681 GKH |
477 | cpqhp_remove_debugfs_files(ctrl); |
478 | ||
1da177e4 LT |
479 | //Free IRQ associated with hot plug device |
480 | free_irq(ctrl->interrupt, ctrl); | |
481 | //Unmap the memory | |
482 | iounmap(ctrl->hpc_reg); | |
483 | //Finally reclaim PCI mem | |
484 | release_mem_region(pci_resource_start(ctrl->pci_dev, 0), | |
485 | pci_resource_len(ctrl->pci_dev, 0)); | |
486 | ||
487 | return(0); | |
488 | } | |
489 | ||
490 | ||
491 | //============================================================================ | |
492 | // function: get_slot_mapping | |
493 | // | |
494 | // Description: Attempts to determine a logical slot mapping for a PCI | |
495 | // device. Won't work for more than one PCI-PCI bridge | |
496 | // in a slot. | |
497 | // | |
498 | // Input: u8 bus_num - bus number of PCI device | |
499 | // u8 dev_num - device number of PCI device | |
500 | // u8 *slot - Pointer to u8 where slot number will | |
501 | // be returned | |
502 | // | |
503 | // Output: SUCCESS or FAILURE | |
504 | //============================================================================= | |
505 | static int | |
506 | get_slot_mapping(struct pci_bus *bus, u8 bus_num, u8 dev_num, u8 *slot) | |
507 | { | |
508 | struct irq_routing_table *PCIIRQRoutingInfoLength; | |
509 | u32 work; | |
510 | long len; | |
511 | long loop; | |
512 | ||
513 | u8 tbus, tdevice, tslot, bridgeSlot; | |
514 | ||
66bef8c0 | 515 | dbg("%s: %p, %d, %d, %p\n", __func__, bus, bus_num, dev_num, slot); |
1da177e4 LT |
516 | |
517 | bridgeSlot = 0xFF; | |
518 | ||
519 | PCIIRQRoutingInfoLength = pcibios_get_irq_routing_table(); | |
520 | if (!PCIIRQRoutingInfoLength) | |
521 | return -1; | |
522 | ||
523 | len = (PCIIRQRoutingInfoLength->size - | |
524 | sizeof(struct irq_routing_table)) / sizeof(struct irq_info); | |
525 | // Make sure I got at least one entry | |
526 | if (len == 0) { | |
527 | kfree(PCIIRQRoutingInfoLength); | |
528 | return -1; | |
529 | } | |
530 | ||
531 | for (loop = 0; loop < len; ++loop) { | |
532 | tbus = PCIIRQRoutingInfoLength->slots[loop].bus; | |
533 | tdevice = PCIIRQRoutingInfoLength->slots[loop].devfn >> 3; | |
534 | tslot = PCIIRQRoutingInfoLength->slots[loop].slot; | |
535 | ||
536 | if ((tbus == bus_num) && (tdevice == dev_num)) { | |
537 | *slot = tslot; | |
538 | kfree(PCIIRQRoutingInfoLength); | |
539 | return 0; | |
540 | } else { | |
541 | /* Did not get a match on the target PCI device. Check | |
542 | * if the current IRQ table entry is a PCI-to-PCI bridge | |
543 | * device. If so, and it's secondary bus matches the | |
544 | * bus number for the target device, I need to save the | |
545 | * bridge's slot number. If I can not find an entry for | |
546 | * the target device, I will have to assume it's on the | |
547 | * other side of the bridge, and assign it the bridge's | |
548 | * slot. */ | |
549 | bus->number = tbus; | |
550 | pci_bus_read_config_dword(bus, PCI_DEVFN(tdevice, 0), | |
3799a4e7 | 551 | PCI_CLASS_REVISION, &work); |
1da177e4 LT |
552 | |
553 | if ((work >> 8) == PCI_TO_PCI_BRIDGE_CLASS) { | |
554 | pci_bus_read_config_dword(bus, | |
555 | PCI_DEVFN(tdevice, 0), | |
556 | PCI_PRIMARY_BUS, &work); | |
557 | // See if bridge's secondary bus matches target bus. | |
558 | if (((work >> 8) & 0x000000FF) == (long) bus_num) { | |
559 | bridgeSlot = tslot; | |
560 | } | |
561 | } | |
562 | } | |
563 | ||
564 | } | |
565 | ||
566 | // If we got here, we didn't find an entry in the IRQ mapping table | |
567 | // for the target PCI device. If we did determine that the target | |
568 | // device is on the other side of a PCI-to-PCI bridge, return the | |
569 | // slot number for the bridge. | |
570 | if (bridgeSlot != 0xFF) { | |
571 | *slot = bridgeSlot; | |
572 | kfree(PCIIRQRoutingInfoLength); | |
573 | return 0; | |
574 | } | |
575 | kfree(PCIIRQRoutingInfoLength); | |
576 | // Couldn't find an entry in the routing table for this PCI device | |
577 | return -1; | |
578 | } | |
579 | ||
580 | ||
581 | /** | |
582 | * cpqhp_set_attention_status - Turns the Amber LED for a slot on or off | |
26e6c66e RD |
583 | * @ctrl: struct controller to use |
584 | * @func: PCI device/function info | |
585 | * @status: LED control flag: 1 = LED on, 0 = LED off | |
1da177e4 LT |
586 | */ |
587 | static int | |
588 | cpqhp_set_attention_status(struct controller *ctrl, struct pci_func *func, | |
589 | u32 status) | |
590 | { | |
591 | u8 hp_slot; | |
592 | ||
593 | if (func == NULL) | |
594 | return(1); | |
595 | ||
596 | hp_slot = func->device - ctrl->slot_device_offset; | |
597 | ||
598 | // Wait for exclusive access to hardware | |
6aa4cdd0 | 599 | mutex_lock(&ctrl->crit_sect); |
1da177e4 LT |
600 | |
601 | if (status == 1) { | |
602 | amber_LED_on (ctrl, hp_slot); | |
603 | } else if (status == 0) { | |
604 | amber_LED_off (ctrl, hp_slot); | |
605 | } else { | |
606 | // Done with exclusive hardware access | |
6aa4cdd0 | 607 | mutex_unlock(&ctrl->crit_sect); |
1da177e4 LT |
608 | return(1); |
609 | } | |
610 | ||
611 | set_SOGO(ctrl); | |
612 | ||
613 | // Wait for SOBS to be unset | |
614 | wait_for_ctrl_irq (ctrl); | |
615 | ||
616 | // Done with exclusive hardware access | |
6aa4cdd0 | 617 | mutex_unlock(&ctrl->crit_sect); |
1da177e4 LT |
618 | |
619 | return(0); | |
620 | } | |
621 | ||
622 | ||
623 | /** | |
624 | * set_attention_status - Turns the Amber LED for a slot on or off | |
26e6c66e RD |
625 | * @hotplug_slot: slot to change LED on |
626 | * @status: LED control flag | |
1da177e4 LT |
627 | */ |
628 | static int set_attention_status (struct hotplug_slot *hotplug_slot, u8 status) | |
629 | { | |
630 | struct pci_func *slot_func; | |
631 | struct slot *slot = hotplug_slot->private; | |
632 | struct controller *ctrl = slot->ctrl; | |
633 | u8 bus; | |
634 | u8 devfn; | |
635 | u8 device; | |
636 | u8 function; | |
637 | ||
30ac7acd | 638 | dbg("%s - physical_slot = %s\n", __func__, slot_name(slot)); |
1da177e4 LT |
639 | |
640 | if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1) | |
641 | return -ENODEV; | |
642 | ||
643 | device = devfn >> 3; | |
644 | function = devfn & 0x7; | |
645 | dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function); | |
646 | ||
647 | slot_func = cpqhp_slot_find(bus, device, function); | |
648 | if (!slot_func) | |
649 | return -ENODEV; | |
650 | ||
651 | return cpqhp_set_attention_status(ctrl, slot_func, status); | |
652 | } | |
653 | ||
654 | ||
655 | static int process_SI(struct hotplug_slot *hotplug_slot) | |
656 | { | |
657 | struct pci_func *slot_func; | |
658 | struct slot *slot = hotplug_slot->private; | |
659 | struct controller *ctrl = slot->ctrl; | |
660 | u8 bus; | |
661 | u8 devfn; | |
662 | u8 device; | |
663 | u8 function; | |
664 | ||
30ac7acd | 665 | dbg("%s - physical_slot = %s\n", __func__, slot_name(slot)); |
1da177e4 LT |
666 | |
667 | if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1) | |
668 | return -ENODEV; | |
669 | ||
670 | device = devfn >> 3; | |
671 | function = devfn & 0x7; | |
672 | dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function); | |
673 | ||
674 | slot_func = cpqhp_slot_find(bus, device, function); | |
675 | if (!slot_func) | |
676 | return -ENODEV; | |
677 | ||
678 | slot_func->bus = bus; | |
679 | slot_func->device = device; | |
680 | slot_func->function = function; | |
681 | slot_func->configured = 0; | |
682 | dbg("board_added(%p, %p)\n", slot_func, ctrl); | |
683 | return cpqhp_process_SI(ctrl, slot_func); | |
684 | } | |
685 | ||
686 | ||
687 | static int process_SS(struct hotplug_slot *hotplug_slot) | |
688 | { | |
689 | struct pci_func *slot_func; | |
690 | struct slot *slot = hotplug_slot->private; | |
691 | struct controller *ctrl = slot->ctrl; | |
692 | u8 bus; | |
693 | u8 devfn; | |
694 | u8 device; | |
695 | u8 function; | |
696 | ||
30ac7acd | 697 | dbg("%s - physical_slot = %s\n", __func__, slot_name(slot)); |
1da177e4 LT |
698 | |
699 | if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1) | |
700 | return -ENODEV; | |
701 | ||
702 | device = devfn >> 3; | |
703 | function = devfn & 0x7; | |
704 | dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function); | |
705 | ||
706 | slot_func = cpqhp_slot_find(bus, device, function); | |
707 | if (!slot_func) | |
708 | return -ENODEV; | |
709 | ||
66bef8c0 | 710 | dbg("In %s, slot_func = %p, ctrl = %p\n", __func__, slot_func, ctrl); |
1da177e4 LT |
711 | return cpqhp_process_SS(ctrl, slot_func); |
712 | } | |
713 | ||
714 | ||
715 | static int hardware_test(struct hotplug_slot *hotplug_slot, u32 value) | |
716 | { | |
717 | struct slot *slot = hotplug_slot->private; | |
718 | struct controller *ctrl = slot->ctrl; | |
719 | ||
30ac7acd | 720 | dbg("%s - physical_slot = %s\n", __func__, slot_name(slot)); |
1da177e4 LT |
721 | |
722 | return cpqhp_hardware_test(ctrl, value); | |
723 | } | |
724 | ||
725 | ||
726 | static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value) | |
727 | { | |
728 | struct slot *slot = hotplug_slot->private; | |
729 | struct controller *ctrl = slot->ctrl; | |
730 | ||
30ac7acd | 731 | dbg("%s - physical_slot = %s\n", __func__, slot_name(slot)); |
1da177e4 LT |
732 | |
733 | *value = get_slot_enabled(ctrl, slot); | |
734 | return 0; | |
735 | } | |
736 | ||
737 | static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value) | |
738 | { | |
739 | struct slot *slot = hotplug_slot->private; | |
740 | struct controller *ctrl = slot->ctrl; | |
741 | ||
30ac7acd | 742 | dbg("%s - physical_slot = %s\n", __func__, slot_name(slot)); |
1da177e4 LT |
743 | |
744 | *value = cpq_get_attention_status(ctrl, slot); | |
745 | return 0; | |
746 | } | |
747 | ||
748 | static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value) | |
749 | { | |
750 | struct slot *slot = hotplug_slot->private; | |
751 | struct controller *ctrl = slot->ctrl; | |
752 | ||
30ac7acd | 753 | dbg("%s - physical_slot = %s\n", __func__, slot_name(slot)); |
1da177e4 LT |
754 | |
755 | *value = cpq_get_latch_status(ctrl, slot); | |
756 | ||
757 | return 0; | |
758 | } | |
759 | ||
760 | static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value) | |
761 | { | |
762 | struct slot *slot = hotplug_slot->private; | |
763 | struct controller *ctrl = slot->ctrl; | |
764 | ||
30ac7acd | 765 | dbg("%s - physical_slot = %s\n", __func__, slot_name(slot)); |
1da177e4 LT |
766 | |
767 | *value = get_presence_status(ctrl, slot); | |
768 | ||
769 | return 0; | |
770 | } | |
771 | ||
772 | static int get_max_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value) | |
773 | { | |
774 | struct slot *slot = hotplug_slot->private; | |
775 | struct controller *ctrl = slot->ctrl; | |
776 | ||
30ac7acd | 777 | dbg("%s - physical_slot = %s\n", __func__, slot_name(slot)); |
1da177e4 LT |
778 | |
779 | *value = ctrl->speed_capability; | |
780 | ||
781 | return 0; | |
782 | } | |
783 | ||
784 | static int get_cur_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value) | |
785 | { | |
786 | struct slot *slot = hotplug_slot->private; | |
787 | struct controller *ctrl = slot->ctrl; | |
788 | ||
30ac7acd | 789 | dbg("%s - physical_slot = %s\n", __func__, slot_name(slot)); |
1da177e4 LT |
790 | |
791 | *value = ctrl->speed; | |
792 | ||
793 | return 0; | |
794 | } | |
795 | ||
796 | static int cpqhpc_probe(struct pci_dev *pdev, const struct pci_device_id *ent) | |
797 | { | |
798 | u8 num_of_slots = 0; | |
799 | u8 hp_slot = 0; | |
800 | u8 device; | |
1da177e4 LT |
801 | u8 bus_cap; |
802 | u16 temp_word; | |
803 | u16 vendor_id; | |
804 | u16 subsystem_vid; | |
805 | u16 subsystem_deviceid; | |
806 | u32 rc; | |
807 | struct controller *ctrl; | |
808 | struct pci_func *func; | |
fe89cf4c BH |
809 | int err; |
810 | ||
811 | err = pci_enable_device(pdev); | |
812 | if (err) { | |
813 | printk(KERN_ERR MY_NAME ": cannot enable PCI device %s (%d)\n", | |
814 | pci_name(pdev), err); | |
815 | return err; | |
816 | } | |
1da177e4 LT |
817 | |
818 | // Need to read VID early b/c it's used to differentiate CPQ and INTC discovery | |
819 | rc = pci_read_config_word(pdev, PCI_VENDOR_ID, &vendor_id); | |
820 | if (rc || ((vendor_id != PCI_VENDOR_ID_COMPAQ) && (vendor_id != PCI_VENDOR_ID_INTEL))) { | |
821 | err(msg_HPC_non_compaq_or_intel); | |
fe89cf4c BH |
822 | rc = -ENODEV; |
823 | goto err_disable_device; | |
1da177e4 LT |
824 | } |
825 | dbg("Vendor ID: %x\n", vendor_id); | |
826 | ||
44c10138 AK |
827 | dbg("revision: %d\n", pdev->revision); |
828 | if ((vendor_id == PCI_VENDOR_ID_COMPAQ) && (!pdev->revision)) { | |
1da177e4 | 829 | err(msg_HPC_rev_error); |
fe89cf4c BH |
830 | rc = -ENODEV; |
831 | goto err_disable_device; | |
1da177e4 LT |
832 | } |
833 | ||
834 | /* Check for the proper subsytem ID's | |
835 | * Intel uses a different SSID programming model than Compaq. | |
836 | * For Intel, each SSID bit identifies a PHP capability. | |
837 | * Also Intel HPC's may have RID=0. | |
838 | */ | |
44c10138 | 839 | if ((pdev->revision > 2) || (vendor_id == PCI_VENDOR_ID_INTEL)) { |
1da177e4 LT |
840 | // TODO: This code can be made to support non-Compaq or Intel subsystem IDs |
841 | rc = pci_read_config_word(pdev, PCI_SUBSYSTEM_VENDOR_ID, &subsystem_vid); | |
842 | if (rc) { | |
66bef8c0 | 843 | err("%s : pci_read_config_word failed\n", __func__); |
fe89cf4c | 844 | goto err_disable_device; |
1da177e4 LT |
845 | } |
846 | dbg("Subsystem Vendor ID: %x\n", subsystem_vid); | |
847 | if ((subsystem_vid != PCI_VENDOR_ID_COMPAQ) && (subsystem_vid != PCI_VENDOR_ID_INTEL)) { | |
848 | err(msg_HPC_non_compaq_or_intel); | |
fe89cf4c BH |
849 | rc = -ENODEV; |
850 | goto err_disable_device; | |
1da177e4 LT |
851 | } |
852 | ||
f5afe806 | 853 | ctrl = kzalloc(sizeof(struct controller), GFP_KERNEL); |
1da177e4 | 854 | if (!ctrl) { |
66bef8c0 | 855 | err("%s : out of memory\n", __func__); |
fe89cf4c BH |
856 | rc = -ENOMEM; |
857 | goto err_disable_device; | |
1da177e4 | 858 | } |
1da177e4 LT |
859 | |
860 | rc = pci_read_config_word(pdev, PCI_SUBSYSTEM_ID, &subsystem_deviceid); | |
861 | if (rc) { | |
66bef8c0 | 862 | err("%s : pci_read_config_word failed\n", __func__); |
1da177e4 LT |
863 | goto err_free_ctrl; |
864 | } | |
865 | ||
866 | info("Hot Plug Subsystem Device ID: %x\n", subsystem_deviceid); | |
867 | ||
868 | /* Set Vendor ID, so it can be accessed later from other functions */ | |
869 | ctrl->vendor_id = vendor_id; | |
870 | ||
871 | switch (subsystem_vid) { | |
872 | case PCI_VENDOR_ID_COMPAQ: | |
44c10138 | 873 | if (pdev->revision >= 0x13) { /* CIOBX */ |
1da177e4 LT |
874 | ctrl->push_flag = 1; |
875 | ctrl->slot_switch_type = 1; | |
876 | ctrl->push_button = 1; | |
877 | ctrl->pci_config_space = 1; | |
878 | ctrl->defeature_PHP = 1; | |
879 | ctrl->pcix_support = 1; | |
880 | ctrl->pcix_speed_capability = 1; | |
881 | pci_read_config_byte(pdev, 0x41, &bus_cap); | |
882 | if (bus_cap & 0x80) { | |
883 | dbg("bus max supports 133MHz PCI-X\n"); | |
884 | ctrl->speed_capability = PCI_SPEED_133MHz_PCIX; | |
885 | break; | |
886 | } | |
887 | if (bus_cap & 0x40) { | |
888 | dbg("bus max supports 100MHz PCI-X\n"); | |
889 | ctrl->speed_capability = PCI_SPEED_100MHz_PCIX; | |
890 | break; | |
891 | } | |
892 | if (bus_cap & 20) { | |
893 | dbg("bus max supports 66MHz PCI-X\n"); | |
894 | ctrl->speed_capability = PCI_SPEED_66MHz_PCIX; | |
895 | break; | |
896 | } | |
897 | if (bus_cap & 10) { | |
898 | dbg("bus max supports 66MHz PCI\n"); | |
899 | ctrl->speed_capability = PCI_SPEED_66MHz; | |
900 | break; | |
901 | } | |
902 | ||
903 | break; | |
904 | } | |
905 | ||
906 | switch (subsystem_deviceid) { | |
907 | case PCI_SUB_HPC_ID: | |
908 | /* Original 6500/7000 implementation */ | |
909 | ctrl->slot_switch_type = 1; | |
910 | ctrl->speed_capability = PCI_SPEED_33MHz; | |
911 | ctrl->push_button = 0; | |
912 | ctrl->pci_config_space = 1; | |
913 | ctrl->defeature_PHP = 1; | |
914 | ctrl->pcix_support = 0; | |
915 | ctrl->pcix_speed_capability = 0; | |
916 | break; | |
917 | case PCI_SUB_HPC_ID2: | |
918 | /* First Pushbutton implementation */ | |
919 | ctrl->push_flag = 1; | |
920 | ctrl->slot_switch_type = 1; | |
921 | ctrl->speed_capability = PCI_SPEED_33MHz; | |
922 | ctrl->push_button = 1; | |
923 | ctrl->pci_config_space = 1; | |
924 | ctrl->defeature_PHP = 1; | |
925 | ctrl->pcix_support = 0; | |
926 | ctrl->pcix_speed_capability = 0; | |
927 | break; | |
928 | case PCI_SUB_HPC_ID_INTC: | |
929 | /* Third party (6500/7000) */ | |
930 | ctrl->slot_switch_type = 1; | |
931 | ctrl->speed_capability = PCI_SPEED_33MHz; | |
932 | ctrl->push_button = 0; | |
933 | ctrl->pci_config_space = 1; | |
934 | ctrl->defeature_PHP = 1; | |
935 | ctrl->pcix_support = 0; | |
936 | ctrl->pcix_speed_capability = 0; | |
937 | break; | |
938 | case PCI_SUB_HPC_ID3: | |
939 | /* First 66 Mhz implementation */ | |
940 | ctrl->push_flag = 1; | |
941 | ctrl->slot_switch_type = 1; | |
942 | ctrl->speed_capability = PCI_SPEED_66MHz; | |
943 | ctrl->push_button = 1; | |
944 | ctrl->pci_config_space = 1; | |
945 | ctrl->defeature_PHP = 1; | |
946 | ctrl->pcix_support = 0; | |
947 | ctrl->pcix_speed_capability = 0; | |
948 | break; | |
949 | case PCI_SUB_HPC_ID4: | |
950 | /* First PCI-X implementation, 100MHz */ | |
951 | ctrl->push_flag = 1; | |
952 | ctrl->slot_switch_type = 1; | |
953 | ctrl->speed_capability = PCI_SPEED_100MHz_PCIX; | |
954 | ctrl->push_button = 1; | |
955 | ctrl->pci_config_space = 1; | |
956 | ctrl->defeature_PHP = 1; | |
957 | ctrl->pcix_support = 1; | |
958 | ctrl->pcix_speed_capability = 0; | |
959 | break; | |
960 | default: | |
961 | err(msg_HPC_not_supported); | |
962 | rc = -ENODEV; | |
963 | goto err_free_ctrl; | |
964 | } | |
965 | break; | |
966 | ||
967 | case PCI_VENDOR_ID_INTEL: | |
968 | /* Check for speed capability (0=33, 1=66) */ | |
969 | if (subsystem_deviceid & 0x0001) { | |
970 | ctrl->speed_capability = PCI_SPEED_66MHz; | |
971 | } else { | |
972 | ctrl->speed_capability = PCI_SPEED_33MHz; | |
973 | } | |
974 | ||
975 | /* Check for push button */ | |
976 | if (subsystem_deviceid & 0x0002) { | |
977 | /* no push button */ | |
978 | ctrl->push_button = 0; | |
979 | } else { | |
980 | /* push button supported */ | |
981 | ctrl->push_button = 1; | |
982 | } | |
983 | ||
984 | /* Check for slot switch type (0=mechanical, 1=not mechanical) */ | |
985 | if (subsystem_deviceid & 0x0004) { | |
986 | /* no switch */ | |
987 | ctrl->slot_switch_type = 0; | |
988 | } else { | |
989 | /* switch */ | |
990 | ctrl->slot_switch_type = 1; | |
991 | } | |
992 | ||
993 | /* PHP Status (0=De-feature PHP, 1=Normal operation) */ | |
994 | if (subsystem_deviceid & 0x0008) { | |
995 | ctrl->defeature_PHP = 1; // PHP supported | |
996 | } else { | |
997 | ctrl->defeature_PHP = 0; // PHP not supported | |
998 | } | |
999 | ||
1000 | /* Alternate Base Address Register Interface (0=not supported, 1=supported) */ | |
1001 | if (subsystem_deviceid & 0x0010) { | |
1002 | ctrl->alternate_base_address = 1; // supported | |
1003 | } else { | |
1004 | ctrl->alternate_base_address = 0; // not supported | |
1005 | } | |
1006 | ||
1007 | /* PCI Config Space Index (0=not supported, 1=supported) */ | |
1008 | if (subsystem_deviceid & 0x0020) { | |
1009 | ctrl->pci_config_space = 1; // supported | |
1010 | } else { | |
1011 | ctrl->pci_config_space = 0; // not supported | |
1012 | } | |
1013 | ||
1014 | /* PCI-X support */ | |
1015 | if (subsystem_deviceid & 0x0080) { | |
1016 | /* PCI-X capable */ | |
1017 | ctrl->pcix_support = 1; | |
1018 | /* Frequency of operation in PCI-X mode */ | |
1019 | if (subsystem_deviceid & 0x0040) { | |
1020 | /* 133MHz PCI-X if bit 7 is 1 */ | |
1021 | ctrl->pcix_speed_capability = 1; | |
1022 | } else { | |
1023 | /* 100MHz PCI-X if bit 7 is 1 and bit 0 is 0, */ | |
1024 | /* 66MHz PCI-X if bit 7 is 1 and bit 0 is 1 */ | |
1025 | ctrl->pcix_speed_capability = 0; | |
1026 | } | |
1027 | } else { | |
1028 | /* Conventional PCI */ | |
1029 | ctrl->pcix_support = 0; | |
1030 | ctrl->pcix_speed_capability = 0; | |
1031 | } | |
1032 | break; | |
1033 | ||
1034 | default: | |
1035 | err(msg_HPC_not_supported); | |
1036 | rc = -ENODEV; | |
1037 | goto err_free_ctrl; | |
1038 | } | |
1039 | ||
1040 | } else { | |
1041 | err(msg_HPC_not_supported); | |
1042 | return -ENODEV; | |
1043 | } | |
1044 | ||
1045 | // Tell the user that we found one. | |
1046 | info("Initializing the PCI hot plug controller residing on PCI bus %d\n", | |
1047 | pdev->bus->number); | |
1048 | ||
1049 | dbg("Hotplug controller capabilities:\n"); | |
1050 | dbg(" speed_capability %d\n", ctrl->speed_capability); | |
1051 | dbg(" slot_switch_type %s\n", ctrl->slot_switch_type ? | |
1052 | "switch present" : "no switch"); | |
1053 | dbg(" defeature_PHP %s\n", ctrl->defeature_PHP ? | |
1054 | "PHP supported" : "PHP not supported"); | |
1055 | dbg(" alternate_base_address %s\n", ctrl->alternate_base_address ? | |
1056 | "supported" : "not supported"); | |
1057 | dbg(" pci_config_space %s\n", ctrl->pci_config_space ? | |
1058 | "supported" : "not supported"); | |
1059 | dbg(" pcix_speed_capability %s\n", ctrl->pcix_speed_capability ? | |
1060 | "supported" : "not supported"); | |
1061 | dbg(" pcix_support %s\n", ctrl->pcix_support ? | |
1062 | "supported" : "not supported"); | |
1063 | ||
1064 | ctrl->pci_dev = pdev; | |
1065 | pci_set_drvdata(pdev, ctrl); | |
1066 | ||
1067 | /* make our own copy of the pci bus structure, | |
1068 | * as we like tweaking it a lot */ | |
1069 | ctrl->pci_bus = kmalloc(sizeof(*ctrl->pci_bus), GFP_KERNEL); | |
1070 | if (!ctrl->pci_bus) { | |
1071 | err("out of memory\n"); | |
1072 | rc = -ENOMEM; | |
1073 | goto err_free_ctrl; | |
1074 | } | |
1075 | memcpy(ctrl->pci_bus, pdev->bus, sizeof(*ctrl->pci_bus)); | |
1076 | ||
1077 | ctrl->bus = pdev->bus->number; | |
44c10138 | 1078 | ctrl->rev = pdev->revision; |
1da177e4 LT |
1079 | dbg("bus device function rev: %d %d %d %d\n", ctrl->bus, |
1080 | PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn), ctrl->rev); | |
1081 | ||
6aa4cdd0 | 1082 | mutex_init(&ctrl->crit_sect); |
1da177e4 LT |
1083 | init_waitqueue_head(&ctrl->queue); |
1084 | ||
1085 | /* initialize our threads if they haven't already been started up */ | |
1086 | rc = one_time_init(); | |
1087 | if (rc) { | |
1088 | goto err_free_bus; | |
1089 | } | |
1090 | ||
1091 | dbg("pdev = %p\n", pdev); | |
1396a8c3 GKH |
1092 | dbg("pci resource start %llx\n", (unsigned long long)pci_resource_start(pdev, 0)); |
1093 | dbg("pci resource len %llx\n", (unsigned long long)pci_resource_len(pdev, 0)); | |
1da177e4 LT |
1094 | |
1095 | if (!request_mem_region(pci_resource_start(pdev, 0), | |
1096 | pci_resource_len(pdev, 0), MY_NAME)) { | |
1097 | err("cannot reserve MMIO region\n"); | |
1098 | rc = -ENOMEM; | |
1099 | goto err_free_bus; | |
1100 | } | |
1101 | ||
1102 | ctrl->hpc_reg = ioremap(pci_resource_start(pdev, 0), | |
1103 | pci_resource_len(pdev, 0)); | |
1104 | if (!ctrl->hpc_reg) { | |
1396a8c3 GKH |
1105 | err("cannot remap MMIO region %llx @ %llx\n", |
1106 | (unsigned long long)pci_resource_len(pdev, 0), | |
1107 | (unsigned long long)pci_resource_start(pdev, 0)); | |
1da177e4 LT |
1108 | rc = -ENODEV; |
1109 | goto err_free_mem_region; | |
1110 | } | |
1111 | ||
1112 | // Check for 66Mhz operation | |
1113 | ctrl->speed = get_controller_speed(ctrl); | |
1114 | ||
1115 | ||
1116 | /******************************************************** | |
1117 | * | |
1118 | * Save configuration headers for this and | |
1119 | * subordinate PCI buses | |
1120 | * | |
1121 | ********************************************************/ | |
1122 | ||
1123 | // find the physical slot number of the first hot plug slot | |
1124 | ||
1125 | /* Get slot won't work for devices behind bridges, but | |
1126 | * in this case it will always be called for the "base" | |
1127 | * bus/dev/func of a slot. | |
1128 | * CS: this is leveraging the PCIIRQ routing code from the kernel | |
1129 | * (pci-pc.c: get_irq_routing_table) */ | |
1130 | rc = get_slot_mapping(ctrl->pci_bus, pdev->bus->number, | |
1131 | (readb(ctrl->hpc_reg + SLOT_MASK) >> 4), | |
1132 | &(ctrl->first_slot)); | |
1133 | dbg("get_slot_mapping: first_slot = %d, returned = %d\n", | |
1134 | ctrl->first_slot, rc); | |
1135 | if (rc) { | |
1136 | err(msg_initialization_err, rc); | |
1137 | goto err_iounmap; | |
1138 | } | |
1139 | ||
1140 | // Store PCI Config Space for all devices on this bus | |
1141 | rc = cpqhp_save_config(ctrl, ctrl->bus, readb(ctrl->hpc_reg + SLOT_MASK)); | |
1142 | if (rc) { | |
1143 | err("%s: unable to save PCI configuration data, error %d\n", | |
66bef8c0 | 1144 | __func__, rc); |
1da177e4 LT |
1145 | goto err_iounmap; |
1146 | } | |
1147 | ||
1148 | /* | |
1149 | * Get IO, memory, and IRQ resources for new devices | |
1150 | */ | |
1151 | // The next line is required for cpqhp_find_available_resources | |
1152 | ctrl->interrupt = pdev->irq; | |
1153 | if (ctrl->interrupt < 0x10) { | |
1154 | cpqhp_legacy_mode = 1; | |
1155 | dbg("System seems to be configured for Full Table Mapped MPS mode\n"); | |
1156 | } | |
1157 | ||
1158 | ctrl->cfgspc_irq = 0; | |
1159 | pci_read_config_byte(pdev, PCI_INTERRUPT_LINE, &ctrl->cfgspc_irq); | |
1160 | ||
1161 | rc = cpqhp_find_available_resources(ctrl, cpqhp_rom_start); | |
1162 | ctrl->add_support = !rc; | |
1163 | if (rc) { | |
1164 | dbg("cpqhp_find_available_resources = 0x%x\n", rc); | |
1165 | err("unable to locate PCI configuration resources for hot plug add.\n"); | |
1166 | goto err_iounmap; | |
1167 | } | |
1168 | ||
1169 | /* | |
1170 | * Finish setting up the hot plug ctrl device | |
1171 | */ | |
1172 | ctrl->slot_device_offset = readb(ctrl->hpc_reg + SLOT_MASK) >> 4; | |
1173 | dbg("NumSlots %d \n", ctrl->slot_device_offset); | |
1174 | ||
1175 | ctrl->next_event = 0; | |
1176 | ||
1177 | /* Setup the slot information structures */ | |
1178 | rc = ctrl_slot_setup(ctrl, smbios_start, smbios_table); | |
1179 | if (rc) { | |
1180 | err(msg_initialization_err, 6); | |
1181 | err("%s: unable to save PCI configuration data, error %d\n", | |
66bef8c0 | 1182 | __func__, rc); |
1da177e4 LT |
1183 | goto err_iounmap; |
1184 | } | |
1185 | ||
1186 | /* Mask all general input interrupts */ | |
1187 | writel(0xFFFFFFFFL, ctrl->hpc_reg + INT_MASK); | |
1188 | ||
1189 | /* set up the interrupt */ | |
1190 | dbg("HPC interrupt = %d \n", ctrl->interrupt); | |
1191 | if (request_irq(ctrl->interrupt, cpqhp_ctrl_intr, | |
6b4486e2 | 1192 | IRQF_SHARED, MY_NAME, ctrl)) { |
1da177e4 LT |
1193 | err("Can't get irq %d for the hotplug pci controller\n", |
1194 | ctrl->interrupt); | |
1195 | rc = -ENODEV; | |
1196 | goto err_iounmap; | |
1197 | } | |
1198 | ||
1199 | /* Enable Shift Out interrupt and clear it, also enable SERR on power fault */ | |
1200 | temp_word = readw(ctrl->hpc_reg + MISC); | |
1201 | temp_word |= 0x4006; | |
1202 | writew(temp_word, ctrl->hpc_reg + MISC); | |
1203 | ||
1204 | // Changed 05/05/97 to clear all interrupts at start | |
1205 | writel(0xFFFFFFFFL, ctrl->hpc_reg + INT_INPUT_CLEAR); | |
1206 | ||
1207 | ctrl->ctrl_int_comp = readl(ctrl->hpc_reg + INT_INPUT_CLEAR); | |
1208 | ||
1209 | writel(0x0L, ctrl->hpc_reg + INT_MASK); | |
1210 | ||
1211 | if (!cpqhp_ctrl_list) { | |
1212 | cpqhp_ctrl_list = ctrl; | |
1213 | ctrl->next = NULL; | |
1214 | } else { | |
1215 | ctrl->next = cpqhp_ctrl_list; | |
1216 | cpqhp_ctrl_list = ctrl; | |
1217 | } | |
1218 | ||
1219 | // turn off empty slots here unless command line option "ON" set | |
1220 | // Wait for exclusive access to hardware | |
6aa4cdd0 | 1221 | mutex_lock(&ctrl->crit_sect); |
1da177e4 LT |
1222 | |
1223 | num_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0F; | |
1224 | ||
1225 | // find first device number for the ctrl | |
1226 | device = readb(ctrl->hpc_reg + SLOT_MASK) >> 4; | |
1227 | ||
1228 | while (num_of_slots) { | |
1229 | dbg("num_of_slots: %d\n", num_of_slots); | |
1230 | func = cpqhp_slot_find(ctrl->bus, device, 0); | |
1231 | if (!func) | |
1232 | break; | |
1233 | ||
1234 | hp_slot = func->device - ctrl->slot_device_offset; | |
1235 | dbg("hp_slot: %d\n", hp_slot); | |
1236 | ||
1237 | // We have to save the presence info for these slots | |
1238 | temp_word = ctrl->ctrl_int_comp >> 16; | |
1239 | func->presence_save = (temp_word >> hp_slot) & 0x01; | |
1240 | func->presence_save |= (temp_word >> (hp_slot + 7)) & 0x02; | |
1241 | ||
1242 | if (ctrl->ctrl_int_comp & (0x1L << hp_slot)) { | |
1243 | func->switch_save = 0; | |
1244 | } else { | |
1245 | func->switch_save = 0x10; | |
1246 | } | |
1247 | ||
1248 | if (!power_mode) { | |
1249 | if (!func->is_a_board) { | |
1250 | green_LED_off(ctrl, hp_slot); | |
1251 | slot_disable(ctrl, hp_slot); | |
1252 | } | |
1253 | } | |
1254 | ||
1255 | device++; | |
1256 | num_of_slots--; | |
1257 | } | |
1258 | ||
1259 | if (!power_mode) { | |
1260 | set_SOGO(ctrl); | |
1261 | // Wait for SOBS to be unset | |
1262 | wait_for_ctrl_irq(ctrl); | |
1263 | } | |
1264 | ||
1265 | rc = init_SERR(ctrl); | |
1266 | if (rc) { | |
1267 | err("init_SERR failed\n"); | |
6aa4cdd0 | 1268 | mutex_unlock(&ctrl->crit_sect); |
1da177e4 LT |
1269 | goto err_free_irq; |
1270 | } | |
1271 | ||
1272 | // Done with exclusive hardware access | |
6aa4cdd0 | 1273 | mutex_unlock(&ctrl->crit_sect); |
1da177e4 | 1274 | |
9f3f4681 | 1275 | cpqhp_create_debugfs_files(ctrl); |
1da177e4 LT |
1276 | |
1277 | return 0; | |
1278 | ||
1279 | err_free_irq: | |
1280 | free_irq(ctrl->interrupt, ctrl); | |
1281 | err_iounmap: | |
1282 | iounmap(ctrl->hpc_reg); | |
1283 | err_free_mem_region: | |
1284 | release_mem_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0)); | |
1285 | err_free_bus: | |
1286 | kfree(ctrl->pci_bus); | |
1287 | err_free_ctrl: | |
1288 | kfree(ctrl); | |
fe89cf4c BH |
1289 | err_disable_device: |
1290 | pci_disable_device(pdev); | |
1da177e4 LT |
1291 | return rc; |
1292 | } | |
1293 | ||
1294 | ||
1295 | static int one_time_init(void) | |
1296 | { | |
1297 | int loop; | |
1298 | int retval = 0; | |
1da177e4 LT |
1299 | |
1300 | if (initialized) | |
1301 | return 0; | |
1302 | ||
1303 | power_mode = 0; | |
1304 | ||
1305 | retval = pci_print_IRQ_route(); | |
1306 | if (retval) | |
1307 | goto error; | |
1308 | ||
1309 | dbg("Initialize + Start the notification mechanism \n"); | |
1310 | ||
1311 | retval = cpqhp_event_start_thread(); | |
1312 | if (retval) | |
1313 | goto error; | |
1314 | ||
1315 | dbg("Initialize slot lists\n"); | |
1316 | for (loop = 0; loop < 256; loop++) { | |
1317 | cpqhp_slot_list[loop] = NULL; | |
1318 | } | |
1319 | ||
1320 | // FIXME: We also need to hook the NMI handler eventually. | |
1321 | // this also needs to be worked with Christoph | |
1322 | // register_NMI_handler(); | |
1323 | ||
1324 | // Map rom address | |
1325 | cpqhp_rom_start = ioremap(ROM_PHY_ADDR, ROM_PHY_LEN); | |
1326 | if (!cpqhp_rom_start) { | |
1327 | err ("Could not ioremap memory region for ROM\n"); | |
1328 | retval = -EIO; | |
1329 | goto error; | |
1330 | } | |
1331 | ||
1332 | /* Now, map the int15 entry point if we are on compaq specific hardware */ | |
1333 | compaq_nvram_init(cpqhp_rom_start); | |
1334 | ||
1335 | /* Map smbios table entry point structure */ | |
1336 | smbios_table = detect_SMBIOS_pointer(cpqhp_rom_start, | |
1337 | cpqhp_rom_start + ROM_PHY_LEN); | |
1338 | if (!smbios_table) { | |
1339 | err ("Could not find the SMBIOS pointer in memory\n"); | |
1340 | retval = -EIO; | |
1341 | goto error_rom_start; | |
1342 | } | |
1343 | ||
1344 | smbios_start = ioremap(readl(smbios_table + ST_ADDRESS), | |
1345 | readw(smbios_table + ST_LENGTH)); | |
1346 | if (!smbios_start) { | |
1347 | err ("Could not ioremap memory region taken from SMBIOS values\n"); | |
1348 | retval = -EIO; | |
1349 | goto error_smbios_start; | |
1350 | } | |
1351 | ||
1352 | initialized = 1; | |
1353 | ||
1354 | return retval; | |
1355 | ||
1356 | error_smbios_start: | |
1357 | iounmap(smbios_start); | |
1358 | error_rom_start: | |
1359 | iounmap(cpqhp_rom_start); | |
1360 | error: | |
1361 | return retval; | |
1362 | } | |
1363 | ||
1364 | ||
1365 | static void __exit unload_cpqphpd(void) | |
1366 | { | |
1367 | struct pci_func *next; | |
1368 | struct pci_func *TempSlot; | |
1369 | int loop; | |
1370 | u32 rc; | |
1371 | struct controller *ctrl; | |
1372 | struct controller *tctrl; | |
1373 | struct pci_resource *res; | |
1374 | struct pci_resource *tres; | |
1375 | ||
1376 | rc = compaq_nvram_store(cpqhp_rom_start); | |
1377 | ||
1378 | ctrl = cpqhp_ctrl_list; | |
1379 | ||
1380 | while (ctrl) { | |
1381 | if (ctrl->hpc_reg) { | |
1382 | u16 misc; | |
1383 | rc = read_slot_enable (ctrl); | |
1384 | ||
1385 | writeb(0, ctrl->hpc_reg + SLOT_SERR); | |
1386 | writel(0xFFFFFFC0L | ~rc, ctrl->hpc_reg + INT_MASK); | |
1387 | ||
1388 | misc = readw(ctrl->hpc_reg + MISC); | |
1389 | misc &= 0xFFFD; | |
1390 | writew(misc, ctrl->hpc_reg + MISC); | |
1391 | } | |
1392 | ||
1393 | ctrl_slot_cleanup(ctrl); | |
1394 | ||
1395 | res = ctrl->io_head; | |
1396 | while (res) { | |
1397 | tres = res; | |
1398 | res = res->next; | |
1399 | kfree(tres); | |
1400 | } | |
1401 | ||
1402 | res = ctrl->mem_head; | |
1403 | while (res) { | |
1404 | tres = res; | |
1405 | res = res->next; | |
1406 | kfree(tres); | |
1407 | } | |
1408 | ||
1409 | res = ctrl->p_mem_head; | |
1410 | while (res) { | |
1411 | tres = res; | |
1412 | res = res->next; | |
1413 | kfree(tres); | |
1414 | } | |
1415 | ||
1416 | res = ctrl->bus_head; | |
1417 | while (res) { | |
1418 | tres = res; | |
1419 | res = res->next; | |
1420 | kfree(tres); | |
1421 | } | |
1422 | ||
1423 | kfree (ctrl->pci_bus); | |
1424 | ||
1425 | tctrl = ctrl; | |
1426 | ctrl = ctrl->next; | |
1427 | kfree(tctrl); | |
1428 | } | |
1429 | ||
1430 | for (loop = 0; loop < 256; loop++) { | |
1431 | next = cpqhp_slot_list[loop]; | |
1432 | while (next != NULL) { | |
1433 | res = next->io_head; | |
1434 | while (res) { | |
1435 | tres = res; | |
1436 | res = res->next; | |
1437 | kfree(tres); | |
1438 | } | |
1439 | ||
1440 | res = next->mem_head; | |
1441 | while (res) { | |
1442 | tres = res; | |
1443 | res = res->next; | |
1444 | kfree(tres); | |
1445 | } | |
1446 | ||
1447 | res = next->p_mem_head; | |
1448 | while (res) { | |
1449 | tres = res; | |
1450 | res = res->next; | |
1451 | kfree(tres); | |
1452 | } | |
1453 | ||
1454 | res = next->bus_head; | |
1455 | while (res) { | |
1456 | tres = res; | |
1457 | res = res->next; | |
1458 | kfree(tres); | |
1459 | } | |
1460 | ||
1461 | TempSlot = next; | |
1462 | next = next->next; | |
1463 | kfree(TempSlot); | |
1464 | } | |
1465 | } | |
1466 | ||
1467 | // Stop the notification mechanism | |
4002307d KM |
1468 | if (initialized) |
1469 | cpqhp_event_stop_thread(); | |
1da177e4 LT |
1470 | |
1471 | //unmap the rom address | |
1472 | if (cpqhp_rom_start) | |
1473 | iounmap(cpqhp_rom_start); | |
1474 | if (smbios_start) | |
1475 | iounmap(smbios_start); | |
1476 | } | |
1477 | ||
1478 | ||
1479 | ||
1480 | static struct pci_device_id hpcd_pci_tbl[] = { | |
1481 | { | |
1482 | /* handle any PCI Hotplug controller */ | |
1483 | .class = ((PCI_CLASS_SYSTEM_PCI_HOTPLUG << 8) | 0x00), | |
1484 | .class_mask = ~0, | |
1485 | ||
1486 | /* no matter who makes it */ | |
1487 | .vendor = PCI_ANY_ID, | |
1488 | .device = PCI_ANY_ID, | |
1489 | .subvendor = PCI_ANY_ID, | |
1490 | .subdevice = PCI_ANY_ID, | |
1491 | ||
1492 | }, { /* end: all zeroes */ } | |
1493 | }; | |
1494 | ||
1495 | MODULE_DEVICE_TABLE(pci, hpcd_pci_tbl); | |
1496 | ||
1497 | ||
1498 | ||
1499 | static struct pci_driver cpqhpc_driver = { | |
1500 | .name = "compaq_pci_hotplug", | |
1501 | .id_table = hpcd_pci_tbl, | |
1502 | .probe = cpqhpc_probe, | |
1503 | /* remove: cpqhpc_remove_one, */ | |
1504 | }; | |
1505 | ||
1506 | ||
1507 | ||
1508 | static int __init cpqhpc_init(void) | |
1509 | { | |
1510 | int result; | |
1511 | ||
1512 | cpqhp_debug = debug; | |
1513 | ||
1514 | info (DRIVER_DESC " version: " DRIVER_VERSION "\n"); | |
9f3f4681 | 1515 | cpqhp_initialize_debugfs(); |
1da177e4 LT |
1516 | result = pci_register_driver(&cpqhpc_driver); |
1517 | dbg("pci_register_driver = %d\n", result); | |
1518 | return result; | |
1519 | } | |
1520 | ||
1521 | ||
1522 | static void __exit cpqhpc_cleanup(void) | |
1523 | { | |
1524 | dbg("unload_cpqphpd()\n"); | |
1525 | unload_cpqphpd(); | |
1526 | ||
1527 | dbg("pci_unregister_driver\n"); | |
1528 | pci_unregister_driver(&cpqhpc_driver); | |
9f3f4681 | 1529 | cpqhp_shutdown_debugfs(); |
1da177e4 LT |
1530 | } |
1531 | ||
1532 | ||
1533 | module_init(cpqhpc_init); | |
1534 | module_exit(cpqhpc_cleanup); | |
1535 | ||
1536 |