[PATCH] cpqphp: fix oops during unload without probe
[linux-2.6.git] / drivers / pci / hotplug / cpqphp_core.c
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
32 #include <linux/config.h>
33 #include <linux/module.h>
34 #include <linux/moduleparam.h>
35 #include <linux/kernel.h>
36 #include <linux/types.h>
37 #include <linux/proc_fs.h>
38 #include <linux/slab.h>
39 #include <linux/workqueue.h>
40 #include <linux/pci.h>
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"
48 #include "../../../arch/i386/pci/pci.h" /* horrible hack showing how processor dependent we are... */
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;
63 static int initialized;
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.
120  *
121  * @begin: begin pointer for region to be scanned.
122  * @end: end pointer for region to be scanned.
123  *
124  * Returns pointer to the head of the SMBIOS tables (or NULL)
125  *
126  */
127 static void __iomem * detect_SMBIOS_pointer(void __iomem *begin, void __iomem *end)
128 {
129         void __iomem *fp;
130         void __iomem *endp;
131         u8 temp1, temp2, temp3, temp4;
132         int status = 0;
133
134         endp = (end - sizeof(u32) + 1);
135
136         for (fp = begin; fp <= endp; fp += 16) {
137                 temp1 = readb(fp);
138                 temp2 = readb(fp+1);
139                 temp3 = readb(fp+2);
140                 temp4 = readb(fp+3);
141                 if (temp1 == '_' &&
142                     temp2 == 'S' &&
143                     temp3 == 'M' &&
144                     temp4 == '_') {
145                         status = 1;
146                         break;
147                 }
148         }
149         
150         if (!status)
151                 fp = NULL;
152
153         dbg("Discovered SMBIOS Entry point at %p\n", fp);
154
155         return fp;
156 }
157
158 /**
159  * init_SERR - Initializes the per slot SERR generation.
160  *
161  * For unexpected switch opens
162  *
163  */
164 static int init_SERR(struct controller * ctrl)
165 {
166         u32 tempdword;
167         u32 number_of_slots;
168         u8 physical_slot;
169
170         if (!ctrl)
171                 return 1;
172
173         tempdword = ctrl->first_slot;
174
175         number_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0F;
176         // Loop through slots
177         while (number_of_slots) {
178                 physical_slot = tempdword;
179                 writeb(0, ctrl->hpc_reg + SLOT_SERR);
180                 tempdword++;
181                 number_of_slots--;
182         }
183
184         return 0;
185 }
186
187
188 /* nice debugging output */
189 static int pci_print_IRQ_route (void)
190 {
191         struct irq_routing_table *routing_table;
192         int len;
193         int loop;
194
195         u8 tbus, tdevice, tslot;
196
197         routing_table = pcibios_get_irq_routing_table();
198         if (routing_table == NULL) {
199                 err("No BIOS Routing Table??? Not good\n");
200                 return -ENOMEM;
201         }
202
203         len = (routing_table->size - sizeof(struct irq_routing_table)) /
204                         sizeof(struct irq_info);
205         // Make sure I got at least one entry
206         if (len == 0) {
207                 kfree(routing_table);
208                 return -1;
209         }
210
211         dbg("bus dev func slot\n");
212
213         for (loop = 0; loop < len; ++loop) {
214                 tbus = routing_table->slots[loop].bus;
215                 tdevice = routing_table->slots[loop].devfn;
216                 tslot = routing_table->slots[loop].slot;
217                 dbg("%d %d %d %d\n", tbus, tdevice >> 3, tdevice & 0x7, tslot);
218
219         }
220         kfree(routing_table);
221         return 0;
222 }
223
224
225 /**
226  * get_subsequent_smbios_entry: get the next entry from bios table.
227  *
228  * Gets the first entry if previous == NULL
229  * Otherwise, returns the next entry
230  * Uses global SMBIOS Table pointer
231  *
232  * @curr: %NULL or pointer to previously returned structure
233  *
234  * returns a pointer to an SMBIOS structure or NULL if none found
235  */
236 static void __iomem *get_subsequent_smbios_entry(void __iomem *smbios_start,
237                                                 void __iomem *smbios_table,
238                                                 void __iomem *curr)
239 {
240         u8 bail = 0;
241         u8 previous_byte = 1;
242         void __iomem *p_temp;
243         void __iomem *p_max;
244
245         if (!smbios_table || !curr)
246                 return(NULL);
247
248         // set p_max to the end of the table
249         p_max = smbios_start + readw(smbios_table + ST_LENGTH);
250
251         p_temp = curr;
252         p_temp += readb(curr + SMBIOS_GENERIC_LENGTH);
253
254         while ((p_temp < p_max) && !bail) {
255                 /* Look for the double NULL terminator
256                  * The first condition is the previous byte
257                  * and the second is the curr */
258                 if (!previous_byte && !(readb(p_temp))) {
259                         bail = 1;
260                 }
261
262                 previous_byte = readb(p_temp);
263                 p_temp++;
264         }
265
266         if (p_temp < p_max) {
267                 return p_temp;
268         } else {
269                 return NULL;
270         }
271 }
272
273
274 /**
275  * get_SMBIOS_entry
276  *
277  * @type:SMBIOS structure type to be returned
278  * @previous: %NULL or pointer to previously returned structure
279  *
280  * Gets the first entry of the specified type if previous == NULL
281  * Otherwise, returns the next entry of the given type.
282  * Uses global SMBIOS Table pointer
283  * Uses get_subsequent_smbios_entry
284  *
285  * returns a pointer to an SMBIOS structure or %NULL if none found
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
318         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
319
320         kfree(slot->hotplug_slot->info);
321         kfree(slot->hotplug_slot->name);
322         kfree(slot->hotplug_slot);
323         kfree(slot);
324 }
325
326 static int ctrl_slot_setup(struct controller *ctrl,
327                         void __iomem *smbios_start,
328                         void __iomem *smbios_table)
329 {
330         struct slot *new_slot;
331         u8 number_of_slots;
332         u8 slot_device;
333         u8 slot_number;
334         u8 ctrl_slot;
335         u32 tempdword;
336         void __iomem *slot_entry= NULL;
337         int result = -ENOMEM;
338
339         dbg("%s\n", __FUNCTION__);
340
341         tempdword = readl(ctrl->hpc_reg + INT_INPUT_CLEAR);
342
343         number_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0F;
344         slot_device = readb(ctrl->hpc_reg + SLOT_MASK) >> 4;
345         slot_number = ctrl->first_slot;
346
347         while (number_of_slots) {
348                 new_slot = kmalloc(sizeof(*new_slot), GFP_KERNEL);
349                 if (!new_slot)
350                         goto error;
351
352                 memset(new_slot, 0, sizeof(struct slot));
353                 new_slot->hotplug_slot = kmalloc(sizeof(*(new_slot->hotplug_slot)),
354                                                 GFP_KERNEL);
355                 if (!new_slot->hotplug_slot)
356                         goto error_slot;
357                 memset(new_slot->hotplug_slot, 0, sizeof(struct hotplug_slot));
358
359                 new_slot->hotplug_slot->info =
360                                 kmalloc(sizeof(*(new_slot->hotplug_slot->info)),
361                                                         GFP_KERNEL);
362                 if (!new_slot->hotplug_slot->info)
363                         goto error_hpslot;
364                 memset(new_slot->hotplug_slot->info, 0,
365                                 sizeof(struct hotplug_slot_info));
366                 new_slot->hotplug_slot->name = kmalloc(SLOT_NAME_SIZE, GFP_KERNEL);
367                 if (!new_slot->hotplug_slot->name)
368                         goto error_info;
369
370                 new_slot->ctrl = ctrl;
371                 new_slot->bus = ctrl->bus;
372                 new_slot->device = slot_device;
373                 new_slot->number = slot_number;
374                 dbg("slot->number = %d\n",new_slot->number);
375
376                 slot_entry = get_SMBIOS_entry(smbios_start, smbios_table, 9,
377                                         slot_entry);
378
379                 while (slot_entry && (readw(slot_entry + SMBIOS_SLOT_NUMBER) != new_slot->number)) {
380                         slot_entry = get_SMBIOS_entry(smbios_start,
381                                                 smbios_table, 9, slot_entry);
382                 }
383
384                 new_slot->p_sm_slot = slot_entry;
385
386                 init_timer(&new_slot->task_event);
387                 new_slot->task_event.expires = jiffies + 5 * HZ;
388                 new_slot->task_event.function = cpqhp_pushbutton_thread;
389
390                 //FIXME: these capabilities aren't used but if they are
391                 //       they need to be correctly implemented
392                 new_slot->capabilities |= PCISLOT_REPLACE_SUPPORTED;
393                 new_slot->capabilities |= PCISLOT_INTERLOCK_SUPPORTED;
394
395                 if (is_slot64bit(new_slot))
396                         new_slot->capabilities |= PCISLOT_64_BIT_SUPPORTED;
397                 if (is_slot66mhz(new_slot))
398                         new_slot->capabilities |= PCISLOT_66_MHZ_SUPPORTED;
399                 if (ctrl->speed == PCI_SPEED_66MHz)
400                         new_slot->capabilities |= PCISLOT_66_MHZ_OPERATION;
401
402                 ctrl_slot = slot_device - (readb(ctrl->hpc_reg + SLOT_MASK) >> 4);
403
404                 // Check presence
405                 new_slot->capabilities |= ((((~tempdword) >> 23) | ((~tempdword) >> 15)) >> ctrl_slot) & 0x02;
406                 // Check the switch state
407                 new_slot->capabilities |= ((~tempdword & 0xFF) >> ctrl_slot) & 0x01;
408                 // Check the slot enable
409                 new_slot->capabilities |= ((read_slot_enable(ctrl) << 2) >> ctrl_slot) & 0x04;
410
411                 /* register this slot with the hotplug pci core */
412                 new_slot->hotplug_slot->release = &release_slot;
413                 new_slot->hotplug_slot->private = new_slot;
414                 make_slot_name(new_slot->hotplug_slot->name, SLOT_NAME_SIZE, new_slot);
415                 new_slot->hotplug_slot->ops = &cpqphp_hotplug_slot_ops;
416                 
417                 new_slot->hotplug_slot->info->power_status = get_slot_enabled(ctrl, new_slot);
418                 new_slot->hotplug_slot->info->attention_status = cpq_get_attention_status(ctrl, new_slot);
419                 new_slot->hotplug_slot->info->latch_status = cpq_get_latch_status(ctrl, new_slot);
420                 new_slot->hotplug_slot->info->adapter_status = get_presence_status(ctrl, new_slot);
421                 
422                 dbg ("registering bus %d, dev %d, number %d, "
423                                 "ctrl->slot_device_offset %d, slot %d\n",
424                                 new_slot->bus, new_slot->device,
425                                 new_slot->number, ctrl->slot_device_offset,
426                                 slot_number);
427                 result = pci_hp_register (new_slot->hotplug_slot);
428                 if (result) {
429                         err ("pci_hp_register failed with error %d\n", result);
430                         goto error_name;
431                 }
432                 
433                 new_slot->next = ctrl->slot;
434                 ctrl->slot = new_slot;
435
436                 number_of_slots--;
437                 slot_device++;
438                 slot_number++;
439         }
440
441         return 0;
442
443 error_name:
444         kfree(new_slot->hotplug_slot->name);
445 error_info:
446         kfree(new_slot->hotplug_slot->info);
447 error_hpslot:
448         kfree(new_slot->hotplug_slot);
449 error_slot:
450         kfree(new_slot);
451 error:
452         return result;
453 }
454
455 static int ctrl_slot_cleanup (struct controller * ctrl)
456 {
457         struct slot *old_slot, *next_slot;
458
459         old_slot = ctrl->slot;
460         ctrl->slot = NULL;
461
462         while (old_slot) {
463                 /* memory will be freed by the release_slot callback */
464                 next_slot = old_slot->next;
465                 pci_hp_deregister (old_slot->hotplug_slot);
466                 old_slot = next_slot;
467         }
468
469         //Free IRQ associated with hot plug device
470         free_irq(ctrl->interrupt, ctrl);
471         //Unmap the memory
472         iounmap(ctrl->hpc_reg);
473         //Finally reclaim PCI mem
474         release_mem_region(pci_resource_start(ctrl->pci_dev, 0),
475                            pci_resource_len(ctrl->pci_dev, 0));
476
477         return(0);
478 }
479
480
481 //============================================================================
482 // function:    get_slot_mapping
483 //
484 // Description: Attempts to determine a logical slot mapping for a PCI
485 //              device.  Won't work for more than one PCI-PCI bridge
486 //              in a slot.
487 //
488 // Input:       u8 bus_num - bus number of PCI device
489 //              u8 dev_num - device number of PCI device
490 //              u8 *slot - Pointer to u8 where slot number will
491 //                      be returned
492 //
493 // Output:      SUCCESS or FAILURE
494 //=============================================================================
495 static int
496 get_slot_mapping(struct pci_bus *bus, u8 bus_num, u8 dev_num, u8 *slot)
497 {
498         struct irq_routing_table *PCIIRQRoutingInfoLength;
499         u32 work;
500         long len;
501         long loop;
502
503         u8 tbus, tdevice, tslot, bridgeSlot;
504
505         dbg("%s: %p, %d, %d, %p\n", __FUNCTION__, bus, bus_num, dev_num, slot);
506
507         bridgeSlot = 0xFF;
508
509         PCIIRQRoutingInfoLength = pcibios_get_irq_routing_table();
510         if (!PCIIRQRoutingInfoLength)
511                 return -1;
512
513         len = (PCIIRQRoutingInfoLength->size -
514                sizeof(struct irq_routing_table)) / sizeof(struct irq_info);
515         // Make sure I got at least one entry
516         if (len == 0) {
517                 kfree(PCIIRQRoutingInfoLength);
518                 return -1;
519         }
520
521         for (loop = 0; loop < len; ++loop) {
522                 tbus = PCIIRQRoutingInfoLength->slots[loop].bus;
523                 tdevice = PCIIRQRoutingInfoLength->slots[loop].devfn >> 3;
524                 tslot = PCIIRQRoutingInfoLength->slots[loop].slot;
525
526                 if ((tbus == bus_num) && (tdevice == dev_num)) {
527                         *slot = tslot;
528                         kfree(PCIIRQRoutingInfoLength);
529                         return 0;
530                 } else {
531                         /* Did not get a match on the target PCI device. Check
532                          * if the current IRQ table entry is a PCI-to-PCI bridge
533                          * device.  If so, and it's secondary bus matches the
534                          * bus number for the target device, I need to save the
535                          * bridge's slot number.  If I can not find an entry for
536                          * the target device, I will have to assume it's on the
537                          * other side of the bridge, and assign it the bridge's
538                          * slot. */
539                         bus->number = tbus;
540                         pci_bus_read_config_dword(bus, PCI_DEVFN(tdevice, 0),
541                                                 PCI_REVISION_ID, &work);
542
543                         if ((work >> 8) == PCI_TO_PCI_BRIDGE_CLASS) {
544                                 pci_bus_read_config_dword(bus,
545                                                         PCI_DEVFN(tdevice, 0),
546                                                         PCI_PRIMARY_BUS, &work);
547                                 // See if bridge's secondary bus matches target bus.
548                                 if (((work >> 8) & 0x000000FF) == (long) bus_num) {
549                                         bridgeSlot = tslot;
550                                 }
551                         }
552                 }
553
554         }
555
556         // If we got here, we didn't find an entry in the IRQ mapping table 
557         // for the target PCI device.  If we did determine that the target 
558         // device is on the other side of a PCI-to-PCI bridge, return the 
559         // slot number for the bridge.
560         if (bridgeSlot != 0xFF) {
561                 *slot = bridgeSlot;
562                 kfree(PCIIRQRoutingInfoLength);
563                 return 0;
564         }
565         kfree(PCIIRQRoutingInfoLength);
566         // Couldn't find an entry in the routing table for this PCI device
567         return -1;
568 }
569
570
571 /**
572  * cpqhp_set_attention_status - Turns the Amber LED for a slot on or off
573  *
574  */
575 static int
576 cpqhp_set_attention_status(struct controller *ctrl, struct pci_func *func,
577                                 u32 status)
578 {
579         u8 hp_slot;
580
581         if (func == NULL)
582                 return(1);
583
584         hp_slot = func->device - ctrl->slot_device_offset;
585
586         // Wait for exclusive access to hardware
587         down(&ctrl->crit_sect);
588
589         if (status == 1) {
590                 amber_LED_on (ctrl, hp_slot);
591         } else if (status == 0) {
592                 amber_LED_off (ctrl, hp_slot);
593         } else {
594                 // Done with exclusive hardware access
595                 up(&ctrl->crit_sect);
596                 return(1);
597         }
598
599         set_SOGO(ctrl);
600
601         // Wait for SOBS to be unset
602         wait_for_ctrl_irq (ctrl);
603
604         // Done with exclusive hardware access
605         up(&ctrl->crit_sect);
606
607         return(0);
608 }
609
610
611 /**
612  * set_attention_status - Turns the Amber LED for a slot on or off
613  *
614  */
615 static int set_attention_status (struct hotplug_slot *hotplug_slot, u8 status)
616 {
617         struct pci_func *slot_func;
618         struct slot *slot = hotplug_slot->private;
619         struct controller *ctrl = slot->ctrl;
620         u8 bus;
621         u8 devfn;
622         u8 device;
623         u8 function;
624
625         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
626
627         if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1)
628                 return -ENODEV;
629
630         device = devfn >> 3;
631         function = devfn & 0x7;
632         dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function);
633
634         slot_func = cpqhp_slot_find(bus, device, function);
635         if (!slot_func)
636                 return -ENODEV;
637
638         return cpqhp_set_attention_status(ctrl, slot_func, status);
639 }
640
641
642 static int process_SI(struct hotplug_slot *hotplug_slot)
643 {
644         struct pci_func *slot_func;
645         struct slot *slot = hotplug_slot->private;
646         struct controller *ctrl = slot->ctrl;
647         u8 bus;
648         u8 devfn;
649         u8 device;
650         u8 function;
651
652         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
653
654         if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1)
655                 return -ENODEV;
656
657         device = devfn >> 3;
658         function = devfn & 0x7;
659         dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function);
660
661         slot_func = cpqhp_slot_find(bus, device, function);
662         if (!slot_func)
663                 return -ENODEV;
664
665         slot_func->bus = bus;
666         slot_func->device = device;
667         slot_func->function = function;
668         slot_func->configured = 0;
669         dbg("board_added(%p, %p)\n", slot_func, ctrl);
670         return cpqhp_process_SI(ctrl, slot_func);
671 }
672
673
674 static int process_SS(struct hotplug_slot *hotplug_slot)
675 {
676         struct pci_func *slot_func;
677         struct slot *slot = hotplug_slot->private;
678         struct controller *ctrl = slot->ctrl;
679         u8 bus;
680         u8 devfn;
681         u8 device;
682         u8 function;
683
684         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
685
686         if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1)
687                 return -ENODEV;
688
689         device = devfn >> 3;
690         function = devfn & 0x7;
691         dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function);
692
693         slot_func = cpqhp_slot_find(bus, device, function);
694         if (!slot_func)
695                 return -ENODEV;
696
697         dbg("In %s, slot_func = %p, ctrl = %p\n", __FUNCTION__, slot_func, ctrl);
698         return cpqhp_process_SS(ctrl, slot_func);
699 }
700
701
702 static int hardware_test(struct hotplug_slot *hotplug_slot, u32 value)
703 {
704         struct slot *slot = hotplug_slot->private;
705         struct controller *ctrl = slot->ctrl;
706
707         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
708
709         return cpqhp_hardware_test(ctrl, value);        
710 }
711
712
713 static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value)
714 {
715         struct slot *slot = hotplug_slot->private;
716         struct controller *ctrl = slot->ctrl;
717
718         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
719
720         *value = get_slot_enabled(ctrl, slot);
721         return 0;
722 }
723
724 static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value)
725 {
726         struct slot *slot = hotplug_slot->private;
727         struct controller *ctrl = slot->ctrl;
728         
729         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
730
731         *value = cpq_get_attention_status(ctrl, slot);
732         return 0;
733 }
734
735 static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value)
736 {
737         struct slot *slot = hotplug_slot->private;
738         struct controller *ctrl = slot->ctrl;
739
740         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
741
742         *value = cpq_get_latch_status(ctrl, slot);
743
744         return 0;
745 }
746
747 static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value)
748 {
749         struct slot *slot = hotplug_slot->private;
750         struct controller *ctrl = slot->ctrl;
751
752         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
753
754         *value = get_presence_status(ctrl, slot);
755
756         return 0;
757 }
758
759 static int get_max_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value)
760 {
761         struct slot *slot = hotplug_slot->private;
762         struct controller *ctrl = slot->ctrl;
763
764         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
765
766         *value = ctrl->speed_capability;
767
768         return 0;
769 }
770
771 static int get_cur_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value)
772 {
773         struct slot *slot = hotplug_slot->private;
774         struct controller *ctrl = slot->ctrl;
775
776         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
777
778         *value = ctrl->speed;
779
780         return 0;
781 }
782
783 static int cpqhpc_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
784 {
785         u8 num_of_slots = 0;
786         u8 hp_slot = 0;
787         u8 device;
788         u8 rev;
789         u8 bus_cap;
790         u16 temp_word;
791         u16 vendor_id;
792         u16 subsystem_vid;
793         u16 subsystem_deviceid;
794         u32 rc;
795         struct controller *ctrl;
796         struct pci_func *func;
797
798         // Need to read VID early b/c it's used to differentiate CPQ and INTC discovery
799         rc = pci_read_config_word(pdev, PCI_VENDOR_ID, &vendor_id);
800         if (rc || ((vendor_id != PCI_VENDOR_ID_COMPAQ) && (vendor_id != PCI_VENDOR_ID_INTEL))) {
801                 err(msg_HPC_non_compaq_or_intel);
802                 return -ENODEV;
803         }
804         dbg("Vendor ID: %x\n", vendor_id);
805
806         rc = pci_read_config_byte(pdev, PCI_REVISION_ID, &rev);
807         dbg("revision: %d\n", rev);
808         if (rc || ((vendor_id == PCI_VENDOR_ID_COMPAQ) && (!rev))) {
809                 err(msg_HPC_rev_error);
810                 return -ENODEV;
811         }
812
813         /* Check for the proper subsytem ID's
814          * Intel uses a different SSID programming model than Compaq.  
815          * For Intel, each SSID bit identifies a PHP capability.
816          * Also Intel HPC's may have RID=0.
817          */
818         if ((rev > 2) || (vendor_id == PCI_VENDOR_ID_INTEL)) {
819                 // TODO: This code can be made to support non-Compaq or Intel subsystem IDs
820                 rc = pci_read_config_word(pdev, PCI_SUBSYSTEM_VENDOR_ID, &subsystem_vid);
821                 if (rc) {
822                         err("%s : pci_read_config_word failed\n", __FUNCTION__);
823                         return rc;
824                 }
825                 dbg("Subsystem Vendor ID: %x\n", subsystem_vid);
826                 if ((subsystem_vid != PCI_VENDOR_ID_COMPAQ) && (subsystem_vid != PCI_VENDOR_ID_INTEL)) {
827                         err(msg_HPC_non_compaq_or_intel);
828                         return -ENODEV;
829                 }
830
831                 ctrl = (struct controller *) kmalloc(sizeof(struct controller), GFP_KERNEL);
832                 if (!ctrl) {
833                         err("%s : out of memory\n", __FUNCTION__);
834                         return -ENOMEM;
835                 }
836                 memset(ctrl, 0, sizeof(struct controller));
837
838                 rc = pci_read_config_word(pdev, PCI_SUBSYSTEM_ID, &subsystem_deviceid);
839                 if (rc) {
840                         err("%s : pci_read_config_word failed\n", __FUNCTION__);
841                         goto err_free_ctrl;
842                 }
843
844                 info("Hot Plug Subsystem Device ID: %x\n", subsystem_deviceid);
845
846                 /* Set Vendor ID, so it can be accessed later from other functions */
847                 ctrl->vendor_id = vendor_id;
848
849                 switch (subsystem_vid) {
850                         case PCI_VENDOR_ID_COMPAQ:
851                                 if (rev >= 0x13) { /* CIOBX */
852                                         ctrl->push_flag = 1;
853                                         ctrl->slot_switch_type = 1;
854                                         ctrl->push_button = 1;
855                                         ctrl->pci_config_space = 1;
856                                         ctrl->defeature_PHP = 1;
857                                         ctrl->pcix_support = 1;
858                                         ctrl->pcix_speed_capability = 1;
859                                         pci_read_config_byte(pdev, 0x41, &bus_cap);
860                                         if (bus_cap & 0x80) {
861                                                 dbg("bus max supports 133MHz PCI-X\n");
862                                                 ctrl->speed_capability = PCI_SPEED_133MHz_PCIX;
863                                                 break;
864                                         }
865                                         if (bus_cap & 0x40) {
866                                                 dbg("bus max supports 100MHz PCI-X\n");
867                                                 ctrl->speed_capability = PCI_SPEED_100MHz_PCIX;
868                                                 break;
869                                         }
870                                         if (bus_cap & 20) {
871                                                 dbg("bus max supports 66MHz PCI-X\n");
872                                                 ctrl->speed_capability = PCI_SPEED_66MHz_PCIX;
873                                                 break;
874                                         }
875                                         if (bus_cap & 10) {
876                                                 dbg("bus max supports 66MHz PCI\n");
877                                                 ctrl->speed_capability = PCI_SPEED_66MHz;
878                                                 break;
879                                         }
880
881                                         break;
882                                 }
883
884                                 switch (subsystem_deviceid) {
885                                         case PCI_SUB_HPC_ID:
886                                                 /* Original 6500/7000 implementation */
887                                                 ctrl->slot_switch_type = 1;
888                                                 ctrl->speed_capability = PCI_SPEED_33MHz;
889                                                 ctrl->push_button = 0;
890                                                 ctrl->pci_config_space = 1;
891                                                 ctrl->defeature_PHP = 1;
892                                                 ctrl->pcix_support = 0;
893                                                 ctrl->pcix_speed_capability = 0;
894                                                 break;
895                                         case PCI_SUB_HPC_ID2:
896                                                 /* First Pushbutton implementation */
897                                                 ctrl->push_flag = 1;
898                                                 ctrl->slot_switch_type = 1;
899                                                 ctrl->speed_capability = PCI_SPEED_33MHz;
900                                                 ctrl->push_button = 1;
901                                                 ctrl->pci_config_space = 1;
902                                                 ctrl->defeature_PHP = 1;
903                                                 ctrl->pcix_support = 0;
904                                                 ctrl->pcix_speed_capability = 0;
905                                                 break;
906                                         case PCI_SUB_HPC_ID_INTC:
907                                                 /* Third party (6500/7000) */
908                                                 ctrl->slot_switch_type = 1;
909                                                 ctrl->speed_capability = PCI_SPEED_33MHz;
910                                                 ctrl->push_button = 0;
911                                                 ctrl->pci_config_space = 1;
912                                                 ctrl->defeature_PHP = 1;
913                                                 ctrl->pcix_support = 0;
914                                                 ctrl->pcix_speed_capability = 0;
915                                                 break;
916                                         case PCI_SUB_HPC_ID3:
917                                                 /* First 66 Mhz implementation */
918                                                 ctrl->push_flag = 1;
919                                                 ctrl->slot_switch_type = 1;
920                                                 ctrl->speed_capability = PCI_SPEED_66MHz;
921                                                 ctrl->push_button = 1;
922                                                 ctrl->pci_config_space = 1;
923                                                 ctrl->defeature_PHP = 1;
924                                                 ctrl->pcix_support = 0;
925                                                 ctrl->pcix_speed_capability = 0;
926                                                 break;
927                                         case PCI_SUB_HPC_ID4:
928                                                 /* First PCI-X implementation, 100MHz */
929                                                 ctrl->push_flag = 1;
930                                                 ctrl->slot_switch_type = 1;
931                                                 ctrl->speed_capability = PCI_SPEED_100MHz_PCIX;
932                                                 ctrl->push_button = 1;
933                                                 ctrl->pci_config_space = 1;
934                                                 ctrl->defeature_PHP = 1;
935                                                 ctrl->pcix_support = 1;
936                                                 ctrl->pcix_speed_capability = 0;        
937                                                 break;
938                                         default:
939                                                 err(msg_HPC_not_supported);
940                                                 rc = -ENODEV;
941                                                 goto err_free_ctrl;
942                                 }
943                                 break;
944
945                         case PCI_VENDOR_ID_INTEL:
946                                 /* Check for speed capability (0=33, 1=66) */
947                                 if (subsystem_deviceid & 0x0001) {
948                                         ctrl->speed_capability = PCI_SPEED_66MHz;
949                                 } else {
950                                         ctrl->speed_capability = PCI_SPEED_33MHz;
951                                 }
952
953                                 /* Check for push button */
954                                 if (subsystem_deviceid & 0x0002) {
955                                         /* no push button */
956                                         ctrl->push_button = 0;
957                                 } else {
958                                         /* push button supported */
959                                         ctrl->push_button = 1;
960                                 }
961
962                                 /* Check for slot switch type (0=mechanical, 1=not mechanical) */
963                                 if (subsystem_deviceid & 0x0004) {
964                                         /* no switch */
965                                         ctrl->slot_switch_type = 0;
966                                 } else {
967                                         /* switch */
968                                         ctrl->slot_switch_type = 1;
969                                 }
970
971                                 /* PHP Status (0=De-feature PHP, 1=Normal operation) */
972                                 if (subsystem_deviceid & 0x0008) {
973                                         ctrl->defeature_PHP = 1;        // PHP supported
974                                 } else {
975                                         ctrl->defeature_PHP = 0;        // PHP not supported
976                                 }
977
978                                 /* Alternate Base Address Register Interface (0=not supported, 1=supported) */
979                                 if (subsystem_deviceid & 0x0010) {
980                                         ctrl->alternate_base_address = 1;       // supported
981                                 } else {
982                                         ctrl->alternate_base_address = 0;       // not supported
983                                 }
984
985                                 /* PCI Config Space Index (0=not supported, 1=supported) */
986                                 if (subsystem_deviceid & 0x0020) {
987                                         ctrl->pci_config_space = 1;             // supported
988                                 } else {
989                                         ctrl->pci_config_space = 0;             // not supported
990                                 }
991
992                                 /* PCI-X support */
993                                 if (subsystem_deviceid & 0x0080) {
994                                         /* PCI-X capable */
995                                         ctrl->pcix_support = 1;
996                                         /* Frequency of operation in PCI-X mode */
997                                         if (subsystem_deviceid & 0x0040) {
998                                                 /* 133MHz PCI-X if bit 7 is 1 */
999                                                 ctrl->pcix_speed_capability = 1;
1000                                         } else {
1001                                                 /* 100MHz PCI-X if bit 7 is 1 and bit 0 is 0, */
1002                                                 /* 66MHz PCI-X if bit 7 is 1 and bit 0 is 1 */
1003                                                 ctrl->pcix_speed_capability = 0;
1004                                         }
1005                                 } else {
1006                                         /* Conventional PCI */
1007                                         ctrl->pcix_support = 0;
1008                                         ctrl->pcix_speed_capability = 0;
1009                                 }
1010                                 break;
1011
1012                         default:
1013                                 err(msg_HPC_not_supported);
1014                                 rc = -ENODEV;
1015                                 goto err_free_ctrl;
1016                 }
1017
1018         } else {
1019                 err(msg_HPC_not_supported);
1020                 return -ENODEV;
1021         }
1022
1023         // Tell the user that we found one.
1024         info("Initializing the PCI hot plug controller residing on PCI bus %d\n",
1025                                         pdev->bus->number);
1026
1027         dbg("Hotplug controller capabilities:\n");
1028         dbg("    speed_capability       %d\n", ctrl->speed_capability);
1029         dbg("    slot_switch_type       %s\n", ctrl->slot_switch_type ?
1030                                         "switch present" : "no switch");
1031         dbg("    defeature_PHP          %s\n", ctrl->defeature_PHP ?
1032                                         "PHP supported" : "PHP not supported");
1033         dbg("    alternate_base_address %s\n", ctrl->alternate_base_address ?
1034                                         "supported" : "not supported");
1035         dbg("    pci_config_space       %s\n", ctrl->pci_config_space ?
1036                                         "supported" : "not supported");
1037         dbg("    pcix_speed_capability  %s\n", ctrl->pcix_speed_capability ?
1038                                         "supported" : "not supported");
1039         dbg("    pcix_support           %s\n", ctrl->pcix_support ?
1040                                         "supported" : "not supported");
1041
1042         ctrl->pci_dev = pdev;
1043         pci_set_drvdata(pdev, ctrl);
1044
1045         /* make our own copy of the pci bus structure,
1046          * as we like tweaking it a lot */
1047         ctrl->pci_bus = kmalloc(sizeof(*ctrl->pci_bus), GFP_KERNEL);
1048         if (!ctrl->pci_bus) {
1049                 err("out of memory\n");
1050                 rc = -ENOMEM;
1051                 goto err_free_ctrl;
1052         }
1053         memcpy(ctrl->pci_bus, pdev->bus, sizeof(*ctrl->pci_bus));
1054
1055         ctrl->bus = pdev->bus->number;
1056         ctrl->rev = rev;
1057         dbg("bus device function rev: %d %d %d %d\n", ctrl->bus,
1058                 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn), ctrl->rev);
1059
1060         init_MUTEX(&ctrl->crit_sect);
1061         init_waitqueue_head(&ctrl->queue);
1062
1063         /* initialize our threads if they haven't already been started up */
1064         rc = one_time_init();
1065         if (rc) {
1066                 goto err_free_bus;
1067         }
1068         
1069         dbg("pdev = %p\n", pdev);
1070         dbg("pci resource start %lx\n", pci_resource_start(pdev, 0));
1071         dbg("pci resource len %lx\n", pci_resource_len(pdev, 0));
1072
1073         if (!request_mem_region(pci_resource_start(pdev, 0),
1074                                 pci_resource_len(pdev, 0), MY_NAME)) {
1075                 err("cannot reserve MMIO region\n");
1076                 rc = -ENOMEM;
1077                 goto err_free_bus;
1078         }
1079
1080         ctrl->hpc_reg = ioremap(pci_resource_start(pdev, 0),
1081                                         pci_resource_len(pdev, 0));
1082         if (!ctrl->hpc_reg) {
1083                 err("cannot remap MMIO region %lx @ %lx\n",
1084                                 pci_resource_len(pdev, 0),
1085                                 pci_resource_start(pdev, 0));
1086                 rc = -ENODEV;
1087                 goto err_free_mem_region;
1088         }
1089
1090         // Check for 66Mhz operation
1091         ctrl->speed = get_controller_speed(ctrl);
1092
1093
1094         /********************************************************
1095          *
1096          *              Save configuration headers for this and
1097          *              subordinate PCI buses
1098          *
1099          ********************************************************/
1100
1101         // find the physical slot number of the first hot plug slot
1102
1103         /* Get slot won't work for devices behind bridges, but
1104          * in this case it will always be called for the "base"
1105          * bus/dev/func of a slot.
1106          * CS: this is leveraging the PCIIRQ routing code from the kernel
1107          * (pci-pc.c: get_irq_routing_table) */
1108         rc = get_slot_mapping(ctrl->pci_bus, pdev->bus->number,
1109                                 (readb(ctrl->hpc_reg + SLOT_MASK) >> 4),
1110                                 &(ctrl->first_slot));
1111         dbg("get_slot_mapping: first_slot = %d, returned = %d\n",
1112                                 ctrl->first_slot, rc);
1113         if (rc) {
1114                 err(msg_initialization_err, rc);
1115                 goto err_iounmap;
1116         }
1117
1118         // Store PCI Config Space for all devices on this bus
1119         rc = cpqhp_save_config(ctrl, ctrl->bus, readb(ctrl->hpc_reg + SLOT_MASK));
1120         if (rc) {
1121                 err("%s: unable to save PCI configuration data, error %d\n",
1122                                 __FUNCTION__, rc);
1123                 goto err_iounmap;
1124         }
1125
1126         /*
1127          * Get IO, memory, and IRQ resources for new devices
1128          */
1129         // The next line is required for cpqhp_find_available_resources
1130         ctrl->interrupt = pdev->irq;
1131         if (ctrl->interrupt < 0x10) {
1132                 cpqhp_legacy_mode = 1;
1133                 dbg("System seems to be configured for Full Table Mapped MPS mode\n");
1134         }
1135
1136         ctrl->cfgspc_irq = 0;
1137         pci_read_config_byte(pdev, PCI_INTERRUPT_LINE, &ctrl->cfgspc_irq);
1138
1139         rc = cpqhp_find_available_resources(ctrl, cpqhp_rom_start);
1140         ctrl->add_support = !rc;
1141         if (rc) {
1142                 dbg("cpqhp_find_available_resources = 0x%x\n", rc);
1143                 err("unable to locate PCI configuration resources for hot plug add.\n");
1144                 goto err_iounmap;
1145         }
1146
1147         /*
1148          * Finish setting up the hot plug ctrl device
1149          */
1150         ctrl->slot_device_offset = readb(ctrl->hpc_reg + SLOT_MASK) >> 4;
1151         dbg("NumSlots %d \n", ctrl->slot_device_offset);
1152
1153         ctrl->next_event = 0;
1154
1155         /* Setup the slot information structures */
1156         rc = ctrl_slot_setup(ctrl, smbios_start, smbios_table);
1157         if (rc) {
1158                 err(msg_initialization_err, 6);
1159                 err("%s: unable to save PCI configuration data, error %d\n",
1160                         __FUNCTION__, rc);
1161                 goto err_iounmap;
1162         }
1163         
1164         /* Mask all general input interrupts */
1165         writel(0xFFFFFFFFL, ctrl->hpc_reg + INT_MASK);
1166
1167         /* set up the interrupt */
1168         dbg("HPC interrupt = %d \n", ctrl->interrupt);
1169         if (request_irq(ctrl->interrupt, cpqhp_ctrl_intr,
1170                         SA_SHIRQ, MY_NAME, ctrl)) {
1171                 err("Can't get irq %d for the hotplug pci controller\n",
1172                         ctrl->interrupt);
1173                 rc = -ENODEV;
1174                 goto err_iounmap;
1175         }
1176
1177         /* Enable Shift Out interrupt and clear it, also enable SERR on power fault */
1178         temp_word = readw(ctrl->hpc_reg + MISC);
1179         temp_word |= 0x4006;
1180         writew(temp_word, ctrl->hpc_reg + MISC);
1181
1182         // Changed 05/05/97 to clear all interrupts at start
1183         writel(0xFFFFFFFFL, ctrl->hpc_reg + INT_INPUT_CLEAR);
1184
1185         ctrl->ctrl_int_comp = readl(ctrl->hpc_reg + INT_INPUT_CLEAR);
1186
1187         writel(0x0L, ctrl->hpc_reg + INT_MASK);
1188
1189         if (!cpqhp_ctrl_list) {
1190                 cpqhp_ctrl_list = ctrl;
1191                 ctrl->next = NULL;
1192         } else {
1193                 ctrl->next = cpqhp_ctrl_list;
1194                 cpqhp_ctrl_list = ctrl;
1195         }
1196
1197         // turn off empty slots here unless command line option "ON" set
1198         // Wait for exclusive access to hardware
1199         down(&ctrl->crit_sect);
1200
1201         num_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0F;
1202
1203         // find first device number for the ctrl
1204         device = readb(ctrl->hpc_reg + SLOT_MASK) >> 4;
1205
1206         while (num_of_slots) {
1207                 dbg("num_of_slots: %d\n", num_of_slots);
1208                 func = cpqhp_slot_find(ctrl->bus, device, 0);
1209                 if (!func)
1210                         break;
1211
1212                 hp_slot = func->device - ctrl->slot_device_offset;
1213                 dbg("hp_slot: %d\n", hp_slot);
1214
1215                 // We have to save the presence info for these slots
1216                 temp_word = ctrl->ctrl_int_comp >> 16;
1217                 func->presence_save = (temp_word >> hp_slot) & 0x01;
1218                 func->presence_save |= (temp_word >> (hp_slot + 7)) & 0x02;
1219
1220                 if (ctrl->ctrl_int_comp & (0x1L << hp_slot)) {
1221                         func->switch_save = 0;
1222                 } else {
1223                         func->switch_save = 0x10;
1224                 }
1225
1226                 if (!power_mode) {
1227                         if (!func->is_a_board) {
1228                                 green_LED_off(ctrl, hp_slot);
1229                                 slot_disable(ctrl, hp_slot);
1230                         }
1231                 }
1232
1233                 device++;
1234                 num_of_slots--;
1235         }
1236
1237         if (!power_mode) {
1238                 set_SOGO(ctrl);
1239                 // Wait for SOBS to be unset
1240                 wait_for_ctrl_irq(ctrl);
1241         }
1242
1243         rc = init_SERR(ctrl);
1244         if (rc) {
1245                 err("init_SERR failed\n");
1246                 up(&ctrl->crit_sect);
1247                 goto err_free_irq;
1248         }
1249
1250         // Done with exclusive hardware access
1251         up(&ctrl->crit_sect);
1252
1253         cpqhp_create_ctrl_files(ctrl);
1254
1255         return 0;
1256
1257 err_free_irq:
1258         free_irq(ctrl->interrupt, ctrl);
1259 err_iounmap:
1260         iounmap(ctrl->hpc_reg);
1261 err_free_mem_region:
1262         release_mem_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
1263 err_free_bus:
1264         kfree(ctrl->pci_bus);
1265 err_free_ctrl:
1266         kfree(ctrl);
1267         return rc;
1268 }
1269
1270
1271 static int one_time_init(void)
1272 {
1273         int loop;
1274         int retval = 0;
1275
1276         if (initialized)
1277                 return 0;
1278
1279         power_mode = 0;
1280
1281         retval = pci_print_IRQ_route();
1282         if (retval)
1283                 goto error;
1284
1285         dbg("Initialize + Start the notification mechanism \n");
1286
1287         retval = cpqhp_event_start_thread();
1288         if (retval)
1289                 goto error;
1290
1291         dbg("Initialize slot lists\n");
1292         for (loop = 0; loop < 256; loop++) {
1293                 cpqhp_slot_list[loop] = NULL;
1294         }
1295
1296         // FIXME: We also need to hook the NMI handler eventually.
1297         // this also needs to be worked with Christoph
1298         // register_NMI_handler();
1299
1300         // Map rom address
1301         cpqhp_rom_start = ioremap(ROM_PHY_ADDR, ROM_PHY_LEN);
1302         if (!cpqhp_rom_start) {
1303                 err ("Could not ioremap memory region for ROM\n");
1304                 retval = -EIO;
1305                 goto error;
1306         }
1307         
1308         /* Now, map the int15 entry point if we are on compaq specific hardware */
1309         compaq_nvram_init(cpqhp_rom_start);
1310         
1311         /* Map smbios table entry point structure */
1312         smbios_table = detect_SMBIOS_pointer(cpqhp_rom_start,
1313                                         cpqhp_rom_start + ROM_PHY_LEN);
1314         if (!smbios_table) {
1315                 err ("Could not find the SMBIOS pointer in memory\n");
1316                 retval = -EIO;
1317                 goto error_rom_start;
1318         }
1319
1320         smbios_start = ioremap(readl(smbios_table + ST_ADDRESS),
1321                                         readw(smbios_table + ST_LENGTH));
1322         if (!smbios_start) {
1323                 err ("Could not ioremap memory region taken from SMBIOS values\n");
1324                 retval = -EIO;
1325                 goto error_smbios_start;
1326         }
1327
1328         initialized = 1;
1329
1330         return retval;
1331
1332 error_smbios_start:
1333         iounmap(smbios_start);
1334 error_rom_start:
1335         iounmap(cpqhp_rom_start);
1336 error:
1337         return retval;
1338 }
1339
1340
1341 static void __exit unload_cpqphpd(void)
1342 {
1343         struct pci_func *next;
1344         struct pci_func *TempSlot;
1345         int loop;
1346         u32 rc;
1347         struct controller *ctrl;
1348         struct controller *tctrl;
1349         struct pci_resource *res;
1350         struct pci_resource *tres;
1351
1352         rc = compaq_nvram_store(cpqhp_rom_start);
1353
1354         ctrl = cpqhp_ctrl_list;
1355
1356         while (ctrl) {
1357                 if (ctrl->hpc_reg) {
1358                         u16 misc;
1359                         rc = read_slot_enable (ctrl);
1360                         
1361                         writeb(0, ctrl->hpc_reg + SLOT_SERR);
1362                         writel(0xFFFFFFC0L | ~rc, ctrl->hpc_reg + INT_MASK);
1363                         
1364                         misc = readw(ctrl->hpc_reg + MISC);
1365                         misc &= 0xFFFD;
1366                         writew(misc, ctrl->hpc_reg + MISC);
1367                 }
1368
1369                 ctrl_slot_cleanup(ctrl);
1370
1371                 res = ctrl->io_head;
1372                 while (res) {
1373                         tres = res;
1374                         res = res->next;
1375                         kfree(tres);
1376                 }
1377
1378                 res = ctrl->mem_head;
1379                 while (res) {
1380                         tres = res;
1381                         res = res->next;
1382                         kfree(tres);
1383                 }
1384
1385                 res = ctrl->p_mem_head;
1386                 while (res) {
1387                         tres = res;
1388                         res = res->next;
1389                         kfree(tres);
1390                 }
1391
1392                 res = ctrl->bus_head;
1393                 while (res) {
1394                         tres = res;
1395                         res = res->next;
1396                         kfree(tres);
1397                 }
1398
1399                 kfree (ctrl->pci_bus);
1400
1401                 tctrl = ctrl;
1402                 ctrl = ctrl->next;
1403                 kfree(tctrl);
1404         }
1405
1406         for (loop = 0; loop < 256; loop++) {
1407                 next = cpqhp_slot_list[loop];
1408                 while (next != NULL) {
1409                         res = next->io_head;
1410                         while (res) {
1411                                 tres = res;
1412                                 res = res->next;
1413                                 kfree(tres);
1414                         }
1415
1416                         res = next->mem_head;
1417                         while (res) {
1418                                 tres = res;
1419                                 res = res->next;
1420                                 kfree(tres);
1421                         }
1422
1423                         res = next->p_mem_head;
1424                         while (res) {
1425                                 tres = res;
1426                                 res = res->next;
1427                                 kfree(tres);
1428                         }
1429
1430                         res = next->bus_head;
1431                         while (res) {
1432                                 tres = res;
1433                                 res = res->next;
1434                                 kfree(tres);
1435                         }
1436
1437                         TempSlot = next;
1438                         next = next->next;
1439                         kfree(TempSlot);
1440                 }
1441         }
1442
1443         // Stop the notification mechanism
1444         if (initialized)
1445                 cpqhp_event_stop_thread();
1446
1447         //unmap the rom address
1448         if (cpqhp_rom_start)
1449                 iounmap(cpqhp_rom_start);
1450         if (smbios_start)
1451                 iounmap(smbios_start);
1452 }
1453
1454
1455
1456 static struct pci_device_id hpcd_pci_tbl[] = {
1457         {
1458         /* handle any PCI Hotplug controller */
1459         .class =        ((PCI_CLASS_SYSTEM_PCI_HOTPLUG << 8) | 0x00),
1460         .class_mask =   ~0,
1461         
1462         /* no matter who makes it */
1463         .vendor =       PCI_ANY_ID,
1464         .device =       PCI_ANY_ID,
1465         .subvendor =    PCI_ANY_ID,
1466         .subdevice =    PCI_ANY_ID,
1467         
1468         }, { /* end: all zeroes */ }
1469 };
1470
1471 MODULE_DEVICE_TABLE(pci, hpcd_pci_tbl);
1472
1473
1474
1475 static struct pci_driver cpqhpc_driver = {
1476         .name =         "compaq_pci_hotplug",
1477         .id_table =     hpcd_pci_tbl,
1478         .probe =        cpqhpc_probe,
1479         /* remove:      cpqhpc_remove_one, */
1480 };
1481
1482
1483
1484 static int __init cpqhpc_init(void)
1485 {
1486         int result;
1487
1488         cpqhp_debug = debug;
1489
1490         info (DRIVER_DESC " version: " DRIVER_VERSION "\n");
1491         result = pci_register_driver(&cpqhpc_driver);
1492         dbg("pci_register_driver = %d\n", result);
1493         return result;
1494 }
1495
1496
1497 static void __exit cpqhpc_cleanup(void)
1498 {
1499         dbg("unload_cpqphpd()\n");
1500         unload_cpqphpd();
1501
1502         dbg("pci_unregister_driver\n");
1503         pci_unregister_driver(&cpqhpc_driver);
1504 }
1505
1506
1507 module_init(cpqhpc_init);
1508 module_exit(cpqhpc_cleanup);
1509
1510