[PATCH] PCI: kzalloc() conversion in drivers/pci
[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 *slot;
331         struct hotplug_slot *hotplug_slot;
332         struct hotplug_slot_info *hotplug_slot_info;
333         u8 number_of_slots;
334         u8 slot_device;
335         u8 slot_number;
336         u8 ctrl_slot;
337         u32 tempdword;
338         void __iomem *slot_entry= NULL;
339         int result = -ENOMEM;
340
341         dbg("%s\n", __FUNCTION__);
342
343         tempdword = readl(ctrl->hpc_reg + INT_INPUT_CLEAR);
344
345         number_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0F;
346         slot_device = readb(ctrl->hpc_reg + SLOT_MASK) >> 4;
347         slot_number = ctrl->first_slot;
348
349         while (number_of_slots) {
350                 slot = kzalloc(sizeof(*slot), GFP_KERNEL);
351                 if (!slot)
352                         goto error;
353
354                 slot->hotplug_slot = kzalloc(sizeof(*(slot->hotplug_slot)),
355                                                 GFP_KERNEL);
356                 if (!slot->hotplug_slot)
357                         goto error_slot;
358                 hotplug_slot = slot->hotplug_slot;
359
360                 hotplug_slot->info =
361                                 kzalloc(sizeof(*(hotplug_slot->info)),
362                                                         GFP_KERNEL);
363                 if (!hotplug_slot->info)
364                         goto error_hpslot;
365                 hotplug_slot_info = hotplug_slot->info;
366                 hotplug_slot->name = kmalloc(SLOT_NAME_SIZE, GFP_KERNEL);
367
368                 if (!hotplug_slot->name)
369                         goto error_info;
370
371                 slot->ctrl = ctrl;
372                 slot->bus = ctrl->bus;
373                 slot->device = slot_device;
374                 slot->number = slot_number;
375                 dbg("slot->number = %d\n", slot->number);
376
377                 slot_entry = get_SMBIOS_entry(smbios_start, smbios_table, 9,
378                                         slot_entry);
379
380                 while (slot_entry && (readw(slot_entry + SMBIOS_SLOT_NUMBER) !=
381                                 slot->number)) {
382                         slot_entry = get_SMBIOS_entry(smbios_start,
383                                                 smbios_table, 9, slot_entry);
384                 }
385
386                 slot->p_sm_slot = slot_entry;
387
388                 init_timer(&slot->task_event);
389                 slot->task_event.expires = jiffies + 5 * HZ;
390                 slot->task_event.function = cpqhp_pushbutton_thread;
391
392                 //FIXME: these capabilities aren't used but if they are
393                 //       they need to be correctly implemented
394                 slot->capabilities |= PCISLOT_REPLACE_SUPPORTED;
395                 slot->capabilities |= PCISLOT_INTERLOCK_SUPPORTED;
396
397                 if (is_slot64bit(slot))
398                         slot->capabilities |= PCISLOT_64_BIT_SUPPORTED;
399                 if (is_slot66mhz(slot))
400                         slot->capabilities |= PCISLOT_66_MHZ_SUPPORTED;
401                 if (ctrl->speed == PCI_SPEED_66MHz)
402                         slot->capabilities |= PCISLOT_66_MHZ_OPERATION;
403
404                 ctrl_slot =
405                         slot_device - (readb(ctrl->hpc_reg + SLOT_MASK) >> 4);
406
407                 // Check presence
408                 slot->capabilities |=
409                         ((((~tempdword) >> 23) |
410                          ((~tempdword) >> 15)) >> ctrl_slot) & 0x02;
411                 // Check the switch state
412                 slot->capabilities |=
413                         ((~tempdword & 0xFF) >> ctrl_slot) & 0x01;
414                 // Check the slot enable
415                 slot->capabilities |=
416                         ((read_slot_enable(ctrl) << 2) >> ctrl_slot) & 0x04;
417
418                 /* register this slot with the hotplug pci core */
419                 hotplug_slot->release = &release_slot;
420                 hotplug_slot->private = slot;
421                 make_slot_name(hotplug_slot->name, SLOT_NAME_SIZE, slot);
422                 hotplug_slot->ops = &cpqphp_hotplug_slot_ops;
423                 
424                 hotplug_slot_info->power_status = get_slot_enabled(ctrl, slot);
425                 hotplug_slot_info->attention_status =
426                         cpq_get_attention_status(ctrl, slot);
427                 hotplug_slot_info->latch_status =
428                         cpq_get_latch_status(ctrl, slot);
429                 hotplug_slot_info->adapter_status =
430                         get_presence_status(ctrl, slot);
431                 
432                 dbg("registering bus %d, dev %d, number %d, "
433                                 "ctrl->slot_device_offset %d, slot %d\n",
434                                 slot->bus, slot->device,
435                                 slot->number, ctrl->slot_device_offset,
436                                 slot_number);
437                 result = pci_hp_register(hotplug_slot);
438                 if (result) {
439                         err("pci_hp_register failed with error %d\n", result);
440                         goto error_name;
441                 }
442                 
443                 slot->next = ctrl->slot;
444                 ctrl->slot = slot;
445
446                 number_of_slots--;
447                 slot_device++;
448                 slot_number++;
449         }
450
451         return 0;
452 error_name:
453         kfree(hotplug_slot->name);
454 error_info:
455         kfree(hotplug_slot_info);
456 error_hpslot:
457         kfree(hotplug_slot);
458 error_slot:
459         kfree(slot);
460 error:
461         return result;
462 }
463
464 static int ctrl_slot_cleanup (struct controller * ctrl)
465 {
466         struct slot *old_slot, *next_slot;
467
468         old_slot = ctrl->slot;
469         ctrl->slot = NULL;
470
471         while (old_slot) {
472                 /* memory will be freed by the release_slot callback */
473                 next_slot = old_slot->next;
474                 pci_hp_deregister (old_slot->hotplug_slot);
475                 old_slot = next_slot;
476         }
477
478         cpqhp_remove_debugfs_files(ctrl);
479
480         //Free IRQ associated with hot plug device
481         free_irq(ctrl->interrupt, ctrl);
482         //Unmap the memory
483         iounmap(ctrl->hpc_reg);
484         //Finally reclaim PCI mem
485         release_mem_region(pci_resource_start(ctrl->pci_dev, 0),
486                            pci_resource_len(ctrl->pci_dev, 0));
487
488         return(0);
489 }
490
491
492 //============================================================================
493 // function:    get_slot_mapping
494 //
495 // Description: Attempts to determine a logical slot mapping for a PCI
496 //              device.  Won't work for more than one PCI-PCI bridge
497 //              in a slot.
498 //
499 // Input:       u8 bus_num - bus number of PCI device
500 //              u8 dev_num - device number of PCI device
501 //              u8 *slot - Pointer to u8 where slot number will
502 //                      be returned
503 //
504 // Output:      SUCCESS or FAILURE
505 //=============================================================================
506 static int
507 get_slot_mapping(struct pci_bus *bus, u8 bus_num, u8 dev_num, u8 *slot)
508 {
509         struct irq_routing_table *PCIIRQRoutingInfoLength;
510         u32 work;
511         long len;
512         long loop;
513
514         u8 tbus, tdevice, tslot, bridgeSlot;
515
516         dbg("%s: %p, %d, %d, %p\n", __FUNCTION__, bus, bus_num, dev_num, slot);
517
518         bridgeSlot = 0xFF;
519
520         PCIIRQRoutingInfoLength = pcibios_get_irq_routing_table();
521         if (!PCIIRQRoutingInfoLength)
522                 return -1;
523
524         len = (PCIIRQRoutingInfoLength->size -
525                sizeof(struct irq_routing_table)) / sizeof(struct irq_info);
526         // Make sure I got at least one entry
527         if (len == 0) {
528                 kfree(PCIIRQRoutingInfoLength);
529                 return -1;
530         }
531
532         for (loop = 0; loop < len; ++loop) {
533                 tbus = PCIIRQRoutingInfoLength->slots[loop].bus;
534                 tdevice = PCIIRQRoutingInfoLength->slots[loop].devfn >> 3;
535                 tslot = PCIIRQRoutingInfoLength->slots[loop].slot;
536
537                 if ((tbus == bus_num) && (tdevice == dev_num)) {
538                         *slot = tslot;
539                         kfree(PCIIRQRoutingInfoLength);
540                         return 0;
541                 } else {
542                         /* Did not get a match on the target PCI device. Check
543                          * if the current IRQ table entry is a PCI-to-PCI bridge
544                          * device.  If so, and it's secondary bus matches the
545                          * bus number for the target device, I need to save the
546                          * bridge's slot number.  If I can not find an entry for
547                          * the target device, I will have to assume it's on the
548                          * other side of the bridge, and assign it the bridge's
549                          * slot. */
550                         bus->number = tbus;
551                         pci_bus_read_config_dword(bus, PCI_DEVFN(tdevice, 0),
552                                                 PCI_REVISION_ID, &work);
553
554                         if ((work >> 8) == PCI_TO_PCI_BRIDGE_CLASS) {
555                                 pci_bus_read_config_dword(bus,
556                                                         PCI_DEVFN(tdevice, 0),
557                                                         PCI_PRIMARY_BUS, &work);
558                                 // See if bridge's secondary bus matches target bus.
559                                 if (((work >> 8) & 0x000000FF) == (long) bus_num) {
560                                         bridgeSlot = tslot;
561                                 }
562                         }
563                 }
564
565         }
566
567         // If we got here, we didn't find an entry in the IRQ mapping table 
568         // for the target PCI device.  If we did determine that the target 
569         // device is on the other side of a PCI-to-PCI bridge, return the 
570         // slot number for the bridge.
571         if (bridgeSlot != 0xFF) {
572                 *slot = bridgeSlot;
573                 kfree(PCIIRQRoutingInfoLength);
574                 return 0;
575         }
576         kfree(PCIIRQRoutingInfoLength);
577         // Couldn't find an entry in the routing table for this PCI device
578         return -1;
579 }
580
581
582 /**
583  * cpqhp_set_attention_status - Turns the Amber LED for a slot on or off
584  *
585  */
586 static int
587 cpqhp_set_attention_status(struct controller *ctrl, struct pci_func *func,
588                                 u32 status)
589 {
590         u8 hp_slot;
591
592         if (func == NULL)
593                 return(1);
594
595         hp_slot = func->device - ctrl->slot_device_offset;
596
597         // Wait for exclusive access to hardware
598         mutex_lock(&ctrl->crit_sect);
599
600         if (status == 1) {
601                 amber_LED_on (ctrl, hp_slot);
602         } else if (status == 0) {
603                 amber_LED_off (ctrl, hp_slot);
604         } else {
605                 // Done with exclusive hardware access
606                 mutex_unlock(&ctrl->crit_sect);
607                 return(1);
608         }
609
610         set_SOGO(ctrl);
611
612         // Wait for SOBS to be unset
613         wait_for_ctrl_irq (ctrl);
614
615         // Done with exclusive hardware access
616         mutex_unlock(&ctrl->crit_sect);
617
618         return(0);
619 }
620
621
622 /**
623  * set_attention_status - Turns the Amber LED for a slot on or off
624  *
625  */
626 static int set_attention_status (struct hotplug_slot *hotplug_slot, u8 status)
627 {
628         struct pci_func *slot_func;
629         struct slot *slot = hotplug_slot->private;
630         struct controller *ctrl = slot->ctrl;
631         u8 bus;
632         u8 devfn;
633         u8 device;
634         u8 function;
635
636         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
637
638         if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1)
639                 return -ENODEV;
640
641         device = devfn >> 3;
642         function = devfn & 0x7;
643         dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function);
644
645         slot_func = cpqhp_slot_find(bus, device, function);
646         if (!slot_func)
647                 return -ENODEV;
648
649         return cpqhp_set_attention_status(ctrl, slot_func, status);
650 }
651
652
653 static int process_SI(struct hotplug_slot *hotplug_slot)
654 {
655         struct pci_func *slot_func;
656         struct slot *slot = hotplug_slot->private;
657         struct controller *ctrl = slot->ctrl;
658         u8 bus;
659         u8 devfn;
660         u8 device;
661         u8 function;
662
663         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
664
665         if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1)
666                 return -ENODEV;
667
668         device = devfn >> 3;
669         function = devfn & 0x7;
670         dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function);
671
672         slot_func = cpqhp_slot_find(bus, device, function);
673         if (!slot_func)
674                 return -ENODEV;
675
676         slot_func->bus = bus;
677         slot_func->device = device;
678         slot_func->function = function;
679         slot_func->configured = 0;
680         dbg("board_added(%p, %p)\n", slot_func, ctrl);
681         return cpqhp_process_SI(ctrl, slot_func);
682 }
683
684
685 static int process_SS(struct hotplug_slot *hotplug_slot)
686 {
687         struct pci_func *slot_func;
688         struct slot *slot = hotplug_slot->private;
689         struct controller *ctrl = slot->ctrl;
690         u8 bus;
691         u8 devfn;
692         u8 device;
693         u8 function;
694
695         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
696
697         if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1)
698                 return -ENODEV;
699
700         device = devfn >> 3;
701         function = devfn & 0x7;
702         dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function);
703
704         slot_func = cpqhp_slot_find(bus, device, function);
705         if (!slot_func)
706                 return -ENODEV;
707
708         dbg("In %s, slot_func = %p, ctrl = %p\n", __FUNCTION__, slot_func, ctrl);
709         return cpqhp_process_SS(ctrl, slot_func);
710 }
711
712
713 static int hardware_test(struct hotplug_slot *hotplug_slot, u32 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         return cpqhp_hardware_test(ctrl, value);        
721 }
722
723
724 static int get_power_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 = get_slot_enabled(ctrl, slot);
732         return 0;
733 }
734
735 static int get_attention_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_attention_status(ctrl, slot);
743         return 0;
744 }
745
746 static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value)
747 {
748         struct slot *slot = hotplug_slot->private;
749         struct controller *ctrl = slot->ctrl;
750
751         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
752
753         *value = cpq_get_latch_status(ctrl, slot);
754
755         return 0;
756 }
757
758 static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value)
759 {
760         struct slot *slot = hotplug_slot->private;
761         struct controller *ctrl = slot->ctrl;
762
763         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
764
765         *value = get_presence_status(ctrl, slot);
766
767         return 0;
768 }
769
770 static int get_max_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value)
771 {
772         struct slot *slot = hotplug_slot->private;
773         struct controller *ctrl = slot->ctrl;
774
775         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
776
777         *value = ctrl->speed_capability;
778
779         return 0;
780 }
781
782 static int get_cur_bus_speed (struct hotplug_slot *hotplug_slot, enum pci_bus_speed *value)
783 {
784         struct slot *slot = hotplug_slot->private;
785         struct controller *ctrl = slot->ctrl;
786
787         dbg("%s - physical_slot = %s\n", __FUNCTION__, hotplug_slot->name);
788
789         *value = ctrl->speed;
790
791         return 0;
792 }
793
794 static int cpqhpc_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
795 {
796         u8 num_of_slots = 0;
797         u8 hp_slot = 0;
798         u8 device;
799         u8 rev;
800         u8 bus_cap;
801         u16 temp_word;
802         u16 vendor_id;
803         u16 subsystem_vid;
804         u16 subsystem_deviceid;
805         u32 rc;
806         struct controller *ctrl;
807         struct pci_func *func;
808         int err;
809
810         err = pci_enable_device(pdev);
811         if (err) {
812                 printk(KERN_ERR MY_NAME ": cannot enable PCI device %s (%d)\n",
813                         pci_name(pdev), err);
814                 return err;
815         }
816
817         // Need to read VID early b/c it's used to differentiate CPQ and INTC discovery
818         rc = pci_read_config_word(pdev, PCI_VENDOR_ID, &vendor_id);
819         if (rc || ((vendor_id != PCI_VENDOR_ID_COMPAQ) && (vendor_id != PCI_VENDOR_ID_INTEL))) {
820                 err(msg_HPC_non_compaq_or_intel);
821                 rc = -ENODEV;
822                 goto err_disable_device;
823         }
824         dbg("Vendor ID: %x\n", vendor_id);
825
826         rc = pci_read_config_byte(pdev, PCI_REVISION_ID, &rev);
827         dbg("revision: %d\n", rev);
828         if (rc || ((vendor_id == PCI_VENDOR_ID_COMPAQ) && (!rev))) {
829                 err(msg_HPC_rev_error);
830                 rc = -ENODEV;
831                 goto err_disable_device;
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          */
839         if ((rev > 2) || (vendor_id == PCI_VENDOR_ID_INTEL)) {
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) {
843                         err("%s : pci_read_config_word failed\n", __FUNCTION__);
844                         goto err_disable_device;
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);
849                         rc = -ENODEV;
850                         goto err_disable_device;
851                 }
852
853                 ctrl = kzalloc(sizeof(struct controller), GFP_KERNEL);
854                 if (!ctrl) {
855                         err("%s : out of memory\n", __FUNCTION__);
856                         rc = -ENOMEM;
857                         goto err_disable_device;
858                 }
859
860                 rc = pci_read_config_word(pdev, PCI_SUBSYSTEM_ID, &subsystem_deviceid);
861                 if (rc) {
862                         err("%s : pci_read_config_word failed\n", __FUNCTION__);
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:
873                                 if (rev >= 0x13) { /* CIOBX */
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;
1078         ctrl->rev = rev;
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
1082         mutex_init(&ctrl->crit_sect);
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);
1092         dbg("pci resource start %lx\n", pci_resource_start(pdev, 0));
1093         dbg("pci resource len %lx\n", pci_resource_len(pdev, 0));
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) {
1105                 err("cannot remap MMIO region %lx @ %lx\n",
1106                                 pci_resource_len(pdev, 0),
1107                                 pci_resource_start(pdev, 0));
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",
1144                                 __FUNCTION__, rc);
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",
1182                         __FUNCTION__, rc);
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,
1192                         SA_SHIRQ, MY_NAME, ctrl)) {
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
1221         mutex_lock(&ctrl->crit_sect);
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");
1268                 mutex_unlock(&ctrl->crit_sect);
1269                 goto err_free_irq;
1270         }
1271
1272         // Done with exclusive hardware access
1273         mutex_unlock(&ctrl->crit_sect);
1274
1275         cpqhp_create_debugfs_files(ctrl);
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);
1289 err_disable_device:
1290         pci_disable_device(pdev);
1291         return rc;
1292 }
1293
1294
1295 static int one_time_init(void)
1296 {
1297         int loop;
1298         int retval = 0;
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
1468         if (initialized)
1469                 cpqhp_event_stop_thread();
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");
1515         cpqhp_initialize_debugfs();
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);
1529         cpqhp_shutdown_debugfs();
1530 }
1531
1532
1533 module_init(cpqhpc_init);
1534 module_exit(cpqhpc_cleanup);
1535
1536