Version:  2.0.40 2.2.26 2.4.37 3.2 3.3 3.4 3.5 3.6 3.7 3.8 3.9 3.10 3.11 3.12 3.13 3.14 3.15 3.16 3.17 3.18

Linux/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 #include <linux/module.h>
 32 #include <linux/moduleparam.h>
 33 #include <linux/kernel.h>
 34 #include <linux/types.h>
 35 #include <linux/proc_fs.h>
 36 #include <linux/slab.h>
 37 #include <linux/workqueue.h>
 38 #include <linux/pci.h>
 39 #include <linux/pci_hotplug.h>
 40 #include <linux/init.h>
 41 #include <linux/interrupt.h>
 42 
 43 #include <asm/uaccess.h>
 44 
 45 #include "cpqphp.h"
 46 #include "cpqphp_nvram.h"
 47 
 48 
 49 /* Global variables */
 50 int cpqhp_debug;
 51 int cpqhp_legacy_mode;
 52 struct controller *cpqhp_ctrl_list;     /* = NULL */
 53 struct pci_func *cpqhp_slot_list[256];
 54 struct irq_routing_table *cpqhp_routing_table;
 55 
 56 /* local variables */
 57 static void __iomem *smbios_table;
 58 static void __iomem *smbios_start;
 59 static void __iomem *cpqhp_rom_start;
 60 static bool power_mode;
 61 static bool debug;
 62 static int initialized;
 63 
 64 #define DRIVER_VERSION  "0.9.8"
 65 #define DRIVER_AUTHOR   "Dan Zink <dan.zink@compaq.com>, Greg Kroah-Hartman <greg@kroah.com>"
 66 #define DRIVER_DESC     "Compaq Hot Plug PCI Controller Driver"
 67 
 68 MODULE_AUTHOR(DRIVER_AUTHOR);
 69 MODULE_DESCRIPTION(DRIVER_DESC);
 70 MODULE_LICENSE("GPL");
 71 
 72 module_param(power_mode, bool, 0644);
 73 MODULE_PARM_DESC(power_mode, "Power mode enabled or not");
 74 
 75 module_param(debug, bool, 0644);
 76 MODULE_PARM_DESC(debug, "Debugging mode enabled or not");
 77 
 78 #define CPQHPC_MODULE_MINOR 208
 79 
 80 static inline int is_slot64bit(struct slot *slot)
 81 {
 82         return (readb(slot->p_sm_slot + SMBIOS_SLOT_WIDTH) == 0x06) ? 1 : 0;
 83 }
 84 
 85 static inline int is_slot66mhz(struct slot *slot)
 86 {
 87         return (readb(slot->p_sm_slot + SMBIOS_SLOT_TYPE) == 0x0E) ? 1 : 0;
 88 }
 89 
 90 /**
 91  * detect_SMBIOS_pointer - find the System Management BIOS Table in mem region.
 92  * @begin: begin pointer for region to be scanned.
 93  * @end: end pointer for region to be scanned.
 94  *
 95  * Returns pointer to the head of the SMBIOS tables (or %NULL).
 96  */
 97 static void __iomem *detect_SMBIOS_pointer(void __iomem *begin, void __iomem *end)
 98 {
 99         void __iomem *fp;
100         void __iomem *endp;
101         u8 temp1, temp2, temp3, temp4;
102         int status = 0;
103 
104         endp = (end - sizeof(u32) + 1);
105 
106         for (fp = begin; fp <= endp; fp += 16) {
107                 temp1 = readb(fp);
108                 temp2 = readb(fp+1);
109                 temp3 = readb(fp+2);
110                 temp4 = readb(fp+3);
111                 if (temp1 == '_' &&
112                     temp2 == 'S' &&
113                     temp3 == 'M' &&
114                     temp4 == '_') {
115                         status = 1;
116                         break;
117                 }
118         }
119 
120         if (!status)
121                 fp = NULL;
122 
123         dbg("Discovered SMBIOS Entry point at %p\n", fp);
124 
125         return fp;
126 }
127 
128 /**
129  * init_SERR - Initializes the per slot SERR generation.
130  * @ctrl: controller to use
131  *
132  * For unexpected switch opens
133  */
134 static int init_SERR(struct controller *ctrl)
135 {
136         u32 tempdword;
137         u32 number_of_slots;
138         u8 physical_slot;
139 
140         if (!ctrl)
141                 return 1;
142 
143         tempdword = ctrl->first_slot;
144 
145         number_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0F;
146         /* Loop through slots */
147         while (number_of_slots) {
148                 physical_slot = tempdword;
149                 writeb(0, ctrl->hpc_reg + SLOT_SERR);
150                 tempdword++;
151                 number_of_slots--;
152         }
153 
154         return 0;
155 }
156 
157 static int init_cpqhp_routing_table(void)
158 {
159         int len;
160 
161         cpqhp_routing_table = pcibios_get_irq_routing_table();
162         if (cpqhp_routing_table == NULL)
163                 return -ENOMEM;
164 
165         len = cpqhp_routing_table_length();
166         if (len == 0) {
167                 kfree(cpqhp_routing_table);
168                 cpqhp_routing_table = NULL;
169                 return -1;
170         }
171 
172         return 0;
173 }
174 
175 /* nice debugging output */
176 static void pci_print_IRQ_route(void)
177 {
178         int len;
179         int loop;
180         u8 tbus, tdevice, tslot;
181 
182         len = cpqhp_routing_table_length();
183 
184         dbg("bus dev func slot\n");
185         for (loop = 0; loop < len; ++loop) {
186                 tbus = cpqhp_routing_table->slots[loop].bus;
187                 tdevice = cpqhp_routing_table->slots[loop].devfn;
188                 tslot = cpqhp_routing_table->slots[loop].slot;
189                 dbg("%d %d %d %d\n", tbus, tdevice >> 3, tdevice & 0x7, tslot);
190 
191         }
192         return;
193 }
194 
195 
196 /**
197  * get_subsequent_smbios_entry: get the next entry from bios table.
198  * @smbios_start: where to start in the SMBIOS table
199  * @smbios_table: location of the SMBIOS table
200  * @curr: %NULL or pointer to previously returned structure
201  *
202  * Gets the first entry if previous == NULL;
203  * otherwise, returns the next entry.
204  * Uses global SMBIOS Table pointer.
205  *
206  * Returns a pointer to an SMBIOS structure or NULL if none found.
207  */
208 static void __iomem *get_subsequent_smbios_entry(void __iomem *smbios_start,
209                                                 void __iomem *smbios_table,
210                                                 void __iomem *curr)
211 {
212         u8 bail = 0;
213         u8 previous_byte = 1;
214         void __iomem *p_temp;
215         void __iomem *p_max;
216 
217         if (!smbios_table || !curr)
218                 return NULL;
219 
220         /* set p_max to the end of the table */
221         p_max = smbios_start + readw(smbios_table + ST_LENGTH);
222 
223         p_temp = curr;
224         p_temp += readb(curr + SMBIOS_GENERIC_LENGTH);
225 
226         while ((p_temp < p_max) && !bail) {
227                 /* Look for the double NULL terminator
228                  * The first condition is the previous byte
229                  * and the second is the curr
230                  */
231                 if (!previous_byte && !(readb(p_temp)))
232                         bail = 1;
233 
234                 previous_byte = readb(p_temp);
235                 p_temp++;
236         }
237 
238         if (p_temp < p_max)
239                 return p_temp;
240         else
241                 return NULL;
242 }
243 
244 
245 /**
246  * get_SMBIOS_entry - return the requested SMBIOS entry or %NULL
247  * @smbios_start: where to start in the SMBIOS table
248  * @smbios_table: location of the SMBIOS table
249  * @type: SMBIOS structure type to be returned
250  * @previous: %NULL or pointer to previously returned structure
251  *
252  * Gets the first entry of the specified type if previous == %NULL;
253  * Otherwise, returns the next entry of the given type.
254  * Uses global SMBIOS Table pointer.
255  * Uses get_subsequent_smbios_entry.
256  *
257  * Returns a pointer to an SMBIOS structure or %NULL if none found.
258  */
259 static void __iomem *get_SMBIOS_entry(void __iomem *smbios_start,
260                                         void __iomem *smbios_table,
261                                         u8 type,
262                                         void __iomem *previous)
263 {
264         if (!smbios_table)
265                 return NULL;
266 
267         if (!previous)
268                 previous = smbios_start;
269         else
270                 previous = get_subsequent_smbios_entry(smbios_start,
271                                         smbios_table, previous);
272 
273         while (previous)
274                 if (readb(previous + SMBIOS_GENERIC_TYPE) != type)
275                         previous = get_subsequent_smbios_entry(smbios_start,
276                                                 smbios_table, previous);
277                 else
278                         break;
279 
280         return previous;
281 }
282 
283 static void release_slot(struct hotplug_slot *hotplug_slot)
284 {
285         struct slot *slot = hotplug_slot->private;
286 
287         dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
288 
289         kfree(slot->hotplug_slot->info);
290         kfree(slot->hotplug_slot);
291         kfree(slot);
292 }
293 
294 static int ctrl_slot_cleanup (struct controller *ctrl)
295 {
296         struct slot *old_slot, *next_slot;
297 
298         old_slot = ctrl->slot;
299         ctrl->slot = NULL;
300 
301         while (old_slot) {
302                 /* memory will be freed by the release_slot callback */
303                 next_slot = old_slot->next;
304                 pci_hp_deregister (old_slot->hotplug_slot);
305                 old_slot = next_slot;
306         }
307 
308         cpqhp_remove_debugfs_files(ctrl);
309 
310         /* Free IRQ associated with hot plug device */
311         free_irq(ctrl->interrupt, ctrl);
312         /* Unmap the memory */
313         iounmap(ctrl->hpc_reg);
314         /* Finally reclaim PCI mem */
315         release_mem_region(pci_resource_start(ctrl->pci_dev, 0),
316                            pci_resource_len(ctrl->pci_dev, 0));
317 
318         return 0;
319 }
320 
321 
322 /**
323  * get_slot_mapping - determine logical slot mapping for PCI device
324  *
325  * Won't work for more than one PCI-PCI bridge in a slot.
326  *
327  * @bus_num - bus number of PCI device
328  * @dev_num - device number of PCI device
329  * @slot - Pointer to u8 where slot number will be returned
330  *
331  * Output:      SUCCESS or FAILURE
332  */
333 static int
334 get_slot_mapping(struct pci_bus *bus, u8 bus_num, u8 dev_num, u8 *slot)
335 {
336         u32 work;
337         long len;
338         long loop;
339 
340         u8 tbus, tdevice, tslot, bridgeSlot;
341 
342         dbg("%s: %p, %d, %d, %p\n", __func__, bus, bus_num, dev_num, slot);
343 
344         bridgeSlot = 0xFF;
345 
346         len = cpqhp_routing_table_length();
347         for (loop = 0; loop < len; ++loop) {
348                 tbus = cpqhp_routing_table->slots[loop].bus;
349                 tdevice = cpqhp_routing_table->slots[loop].devfn >> 3;
350                 tslot = cpqhp_routing_table->slots[loop].slot;
351 
352                 if ((tbus == bus_num) && (tdevice == dev_num)) {
353                         *slot = tslot;
354                         return 0;
355                 } else {
356                         /* Did not get a match on the target PCI device. Check
357                          * if the current IRQ table entry is a PCI-to-PCI
358                          * bridge device.  If so, and it's secondary bus
359                          * matches the bus number for the target device, I need
360                          * to save the bridge's slot number.  If I can not find
361                          * an entry for the target device, I will have to
362                          * assume it's on the other side of the bridge, and
363                          * assign it the bridge's slot.
364                          */
365                         bus->number = tbus;
366                         pci_bus_read_config_dword(bus, PCI_DEVFN(tdevice, 0),
367                                                 PCI_CLASS_REVISION, &work);
368 
369                         if ((work >> 8) == PCI_TO_PCI_BRIDGE_CLASS) {
370                                 pci_bus_read_config_dword(bus,
371                                                         PCI_DEVFN(tdevice, 0),
372                                                         PCI_PRIMARY_BUS, &work);
373                                 // See if bridge's secondary bus matches target bus.
374                                 if (((work >> 8) & 0x000000FF) == (long) bus_num)
375                                         bridgeSlot = tslot;
376                         }
377                 }
378 
379         }
380 
381         /* If we got here, we didn't find an entry in the IRQ mapping table for
382          * the target PCI device.  If we did determine that the target device
383          * is on the other side of a PCI-to-PCI bridge, return the slot number
384          * for the bridge.
385          */
386         if (bridgeSlot != 0xFF) {
387                 *slot = bridgeSlot;
388                 return 0;
389         }
390         /* Couldn't find an entry in the routing table for this PCI device */
391         return -1;
392 }
393 
394 
395 /**
396  * cpqhp_set_attention_status - Turns the Amber LED for a slot on or off
397  * @ctrl: struct controller to use
398  * @func: PCI device/function info
399  * @status: LED control flag: 1 = LED on, 0 = LED off
400  */
401 static int
402 cpqhp_set_attention_status(struct controller *ctrl, struct pci_func *func,
403                                 u32 status)
404 {
405         u8 hp_slot;
406 
407         if (func == NULL)
408                 return 1;
409 
410         hp_slot = func->device - ctrl->slot_device_offset;
411 
412         /* Wait for exclusive access to hardware */
413         mutex_lock(&ctrl->crit_sect);
414 
415         if (status == 1)
416                 amber_LED_on (ctrl, hp_slot);
417         else if (status == 0)
418                 amber_LED_off (ctrl, hp_slot);
419         else {
420                 /* Done with exclusive hardware access */
421                 mutex_unlock(&ctrl->crit_sect);
422                 return 1;
423         }
424 
425         set_SOGO(ctrl);
426 
427         /* Wait for SOBS to be unset */
428         wait_for_ctrl_irq (ctrl);
429 
430         /* Done with exclusive hardware access */
431         mutex_unlock(&ctrl->crit_sect);
432 
433         return 0;
434 }
435 
436 
437 /**
438  * set_attention_status - Turns the Amber LED for a slot on or off
439  * @hotplug_slot: slot to change LED on
440  * @status: LED control flag
441  */
442 static int set_attention_status (struct hotplug_slot *hotplug_slot, u8 status)
443 {
444         struct pci_func *slot_func;
445         struct slot *slot = hotplug_slot->private;
446         struct controller *ctrl = slot->ctrl;
447         u8 bus;
448         u8 devfn;
449         u8 device;
450         u8 function;
451 
452         dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
453 
454         if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1)
455                 return -ENODEV;
456 
457         device = devfn >> 3;
458         function = devfn & 0x7;
459         dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function);
460 
461         slot_func = cpqhp_slot_find(bus, device, function);
462         if (!slot_func)
463                 return -ENODEV;
464 
465         return cpqhp_set_attention_status(ctrl, slot_func, status);
466 }
467 
468 
469 static int process_SI(struct hotplug_slot *hotplug_slot)
470 {
471         struct pci_func *slot_func;
472         struct slot *slot = hotplug_slot->private;
473         struct controller *ctrl = slot->ctrl;
474         u8 bus;
475         u8 devfn;
476         u8 device;
477         u8 function;
478 
479         dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
480 
481         if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1)
482                 return -ENODEV;
483 
484         device = devfn >> 3;
485         function = devfn & 0x7;
486         dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function);
487 
488         slot_func = cpqhp_slot_find(bus, device, function);
489         if (!slot_func)
490                 return -ENODEV;
491 
492         slot_func->bus = bus;
493         slot_func->device = device;
494         slot_func->function = function;
495         slot_func->configured = 0;
496         dbg("board_added(%p, %p)\n", slot_func, ctrl);
497         return cpqhp_process_SI(ctrl, slot_func);
498 }
499 
500 
501 static int process_SS(struct hotplug_slot *hotplug_slot)
502 {
503         struct pci_func *slot_func;
504         struct slot *slot = hotplug_slot->private;
505         struct controller *ctrl = slot->ctrl;
506         u8 bus;
507         u8 devfn;
508         u8 device;
509         u8 function;
510 
511         dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
512 
513         if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1)
514                 return -ENODEV;
515 
516         device = devfn >> 3;
517         function = devfn & 0x7;
518         dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function);
519 
520         slot_func = cpqhp_slot_find(bus, device, function);
521         if (!slot_func)
522                 return -ENODEV;
523 
524         dbg("In %s, slot_func = %p, ctrl = %p\n", __func__, slot_func, ctrl);
525         return cpqhp_process_SS(ctrl, slot_func);
526 }
527 
528 
529 static int hardware_test(struct hotplug_slot *hotplug_slot, u32 value)
530 {
531         struct slot *slot = hotplug_slot->private;
532         struct controller *ctrl = slot->ctrl;
533 
534         dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
535 
536         return cpqhp_hardware_test(ctrl, value);
537 }
538 
539 
540 static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value)
541 {
542         struct slot *slot = hotplug_slot->private;
543         struct controller *ctrl = slot->ctrl;
544 
545         dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
546 
547         *value = get_slot_enabled(ctrl, slot);
548         return 0;
549 }
550 
551 static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value)
552 {
553         struct slot *slot = hotplug_slot->private;
554         struct controller *ctrl = slot->ctrl;
555 
556         dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
557 
558         *value = cpq_get_attention_status(ctrl, slot);
559         return 0;
560 }
561 
562 static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value)
563 {
564         struct slot *slot = hotplug_slot->private;
565         struct controller *ctrl = slot->ctrl;
566 
567         dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
568 
569         *value = cpq_get_latch_status(ctrl, slot);
570 
571         return 0;
572 }
573 
574 static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value)
575 {
576         struct slot *slot = hotplug_slot->private;
577         struct controller *ctrl = slot->ctrl;
578 
579         dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
580 
581         *value = get_presence_status(ctrl, slot);
582 
583         return 0;
584 }
585 
586 static struct hotplug_slot_ops cpqphp_hotplug_slot_ops = {
587         .set_attention_status = set_attention_status,
588         .enable_slot =          process_SI,
589         .disable_slot =         process_SS,
590         .hardware_test =        hardware_test,
591         .get_power_status =     get_power_status,
592         .get_attention_status = get_attention_status,
593         .get_latch_status =     get_latch_status,
594         .get_adapter_status =   get_adapter_status,
595 };
596 
597 #define SLOT_NAME_SIZE 10
598 
599 static int ctrl_slot_setup(struct controller *ctrl,
600                         void __iomem *smbios_start,
601                         void __iomem *smbios_table)
602 {
603         struct slot *slot;
604         struct hotplug_slot *hotplug_slot;
605         struct hotplug_slot_info *hotplug_slot_info;
606         struct pci_bus *bus = ctrl->pci_bus;
607         u8 number_of_slots;
608         u8 slot_device;
609         u8 slot_number;
610         u8 ctrl_slot;
611         u32 tempdword;
612         char name[SLOT_NAME_SIZE];
613         void __iomem *slot_entry= NULL;
614         int result;
615 
616         dbg("%s\n", __func__);
617 
618         tempdword = readl(ctrl->hpc_reg + INT_INPUT_CLEAR);
619 
620         number_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0F;
621         slot_device = readb(ctrl->hpc_reg + SLOT_MASK) >> 4;
622         slot_number = ctrl->first_slot;
623 
624         while (number_of_slots) {
625                 slot = kzalloc(sizeof(*slot), GFP_KERNEL);
626                 if (!slot) {
627                         result = -ENOMEM;
628                         goto error;
629                 }
630 
631                 slot->hotplug_slot = kzalloc(sizeof(*(slot->hotplug_slot)),
632                                                 GFP_KERNEL);
633                 if (!slot->hotplug_slot) {
634                         result = -ENOMEM;
635                         goto error_slot;
636                 }
637                 hotplug_slot = slot->hotplug_slot;
638 
639                 hotplug_slot->info = kzalloc(sizeof(*(hotplug_slot->info)),
640                                                         GFP_KERNEL);
641                 if (!hotplug_slot->info) {
642                         result = -ENOMEM;
643                         goto error_hpslot;
644                 }
645                 hotplug_slot_info = hotplug_slot->info;
646 
647                 slot->ctrl = ctrl;
648                 slot->bus = ctrl->bus;
649                 slot->device = slot_device;
650                 slot->number = slot_number;
651                 dbg("slot->number = %u\n", slot->number);
652 
653                 slot_entry = get_SMBIOS_entry(smbios_start, smbios_table, 9,
654                                         slot_entry);
655 
656                 while (slot_entry && (readw(slot_entry + SMBIOS_SLOT_NUMBER) !=
657                                 slot->number)) {
658                         slot_entry = get_SMBIOS_entry(smbios_start,
659                                                 smbios_table, 9, slot_entry);
660                 }
661 
662                 slot->p_sm_slot = slot_entry;
663 
664                 init_timer(&slot->task_event);
665                 slot->task_event.expires = jiffies + 5 * HZ;
666                 slot->task_event.function = cpqhp_pushbutton_thread;
667 
668                 /*FIXME: these capabilities aren't used but if they are
669                  *       they need to be correctly implemented
670                  */
671                 slot->capabilities |= PCISLOT_REPLACE_SUPPORTED;
672                 slot->capabilities |= PCISLOT_INTERLOCK_SUPPORTED;
673 
674                 if (is_slot64bit(slot))
675                         slot->capabilities |= PCISLOT_64_BIT_SUPPORTED;
676                 if (is_slot66mhz(slot))
677                         slot->capabilities |= PCISLOT_66_MHZ_SUPPORTED;
678                 if (bus->cur_bus_speed == PCI_SPEED_66MHz)
679                         slot->capabilities |= PCISLOT_66_MHZ_OPERATION;
680 
681                 ctrl_slot =
682                         slot_device - (readb(ctrl->hpc_reg + SLOT_MASK) >> 4);
683 
684                 /* Check presence */
685                 slot->capabilities |=
686                         ((((~tempdword) >> 23) |
687                          ((~tempdword) >> 15)) >> ctrl_slot) & 0x02;
688                 /* Check the switch state */
689                 slot->capabilities |=
690                         ((~tempdword & 0xFF) >> ctrl_slot) & 0x01;
691                 /* Check the slot enable */
692                 slot->capabilities |=
693                         ((read_slot_enable(ctrl) << 2) >> ctrl_slot) & 0x04;
694 
695                 /* register this slot with the hotplug pci core */
696                 hotplug_slot->release = &release_slot;
697                 hotplug_slot->private = slot;
698                 snprintf(name, SLOT_NAME_SIZE, "%u", slot->number);
699                 hotplug_slot->ops = &cpqphp_hotplug_slot_ops;
700 
701                 hotplug_slot_info->power_status = get_slot_enabled(ctrl, slot);
702                 hotplug_slot_info->attention_status =
703                         cpq_get_attention_status(ctrl, slot);
704                 hotplug_slot_info->latch_status =
705                         cpq_get_latch_status(ctrl, slot);
706                 hotplug_slot_info->adapter_status =
707                         get_presence_status(ctrl, slot);
708 
709                 dbg("registering bus %d, dev %d, number %d, ctrl->slot_device_offset %d, slot %d\n",
710                                 slot->bus, slot->device,
711                                 slot->number, ctrl->slot_device_offset,
712                                 slot_number);
713                 result = pci_hp_register(hotplug_slot,
714                                          ctrl->pci_dev->bus,
715                                          slot->device,
716                                          name);
717                 if (result) {
718                         err("pci_hp_register failed with error %d\n", result);
719                         goto error_info;
720                 }
721 
722                 slot->next = ctrl->slot;
723                 ctrl->slot = slot;
724 
725                 number_of_slots--;
726                 slot_device++;
727                 slot_number++;
728         }
729 
730         return 0;
731 error_info:
732         kfree(hotplug_slot_info);
733 error_hpslot:
734         kfree(hotplug_slot);
735 error_slot:
736         kfree(slot);
737 error:
738         return result;
739 }
740 
741 static int one_time_init(void)
742 {
743         int loop;
744         int retval = 0;
745 
746         if (initialized)
747                 return 0;
748 
749         power_mode = 0;
750 
751         retval = init_cpqhp_routing_table();
752         if (retval)
753                 goto error;
754 
755         if (cpqhp_debug)
756                 pci_print_IRQ_route();
757 
758         dbg("Initialize + Start the notification mechanism \n");
759 
760         retval = cpqhp_event_start_thread();
761         if (retval)
762                 goto error;
763 
764         dbg("Initialize slot lists\n");
765         for (loop = 0; loop < 256; loop++)
766                 cpqhp_slot_list[loop] = NULL;
767 
768         /* FIXME: We also need to hook the NMI handler eventually.
769          * this also needs to be worked with Christoph
770          * register_NMI_handler();
771          */
772         /* Map rom address */
773         cpqhp_rom_start = ioremap(ROM_PHY_ADDR, ROM_PHY_LEN);
774         if (!cpqhp_rom_start) {
775                 err ("Could not ioremap memory region for ROM\n");
776                 retval = -EIO;
777                 goto error;
778         }
779 
780         /* Now, map the int15 entry point if we are on compaq specific
781          * hardware
782          */
783         compaq_nvram_init(cpqhp_rom_start);
784 
785         /* Map smbios table entry point structure */
786         smbios_table = detect_SMBIOS_pointer(cpqhp_rom_start,
787                                         cpqhp_rom_start + ROM_PHY_LEN);
788         if (!smbios_table) {
789                 err ("Could not find the SMBIOS pointer in memory\n");
790                 retval = -EIO;
791                 goto error_rom_start;
792         }
793 
794         smbios_start = ioremap(readl(smbios_table + ST_ADDRESS),
795                                         readw(smbios_table + ST_LENGTH));
796         if (!smbios_start) {
797                 err ("Could not ioremap memory region taken from SMBIOS values\n");
798                 retval = -EIO;
799                 goto error_smbios_start;
800         }
801 
802         initialized = 1;
803 
804         return retval;
805 
806 error_smbios_start:
807         iounmap(smbios_start);
808 error_rom_start:
809         iounmap(cpqhp_rom_start);
810 error:
811         return retval;
812 }
813 
814 static int cpqhpc_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
815 {
816         u8 num_of_slots = 0;
817         u8 hp_slot = 0;
818         u8 device;
819         u8 bus_cap;
820         u16 temp_word;
821         u16 vendor_id;
822         u16 subsystem_vid;
823         u16 subsystem_deviceid;
824         u32 rc;
825         struct controller *ctrl;
826         struct pci_func *func;
827         struct pci_bus *bus;
828         int err;
829 
830         err = pci_enable_device(pdev);
831         if (err) {
832                 printk(KERN_ERR MY_NAME ": cannot enable PCI device %s (%d)\n",
833                         pci_name(pdev), err);
834                 return err;
835         }
836 
837         bus = pdev->subordinate;
838         if (!bus) {
839                 dev_notice(&pdev->dev, "the device is not a bridge, skipping\n");
840                 rc = -ENODEV;
841                 goto err_disable_device;
842         }
843 
844         /* Need to read VID early b/c it's used to differentiate CPQ and INTC
845          * discovery
846          */
847         vendor_id = pdev->vendor;
848         if ((vendor_id != PCI_VENDOR_ID_COMPAQ) &&
849             (vendor_id != PCI_VENDOR_ID_INTEL)) {
850                 err(msg_HPC_non_compaq_or_intel);
851                 rc = -ENODEV;
852                 goto err_disable_device;
853         }
854         dbg("Vendor ID: %x\n", vendor_id);
855 
856         dbg("revision: %d\n", pdev->revision);
857         if ((vendor_id == PCI_VENDOR_ID_COMPAQ) && (!pdev->revision)) {
858                 err(msg_HPC_rev_error);
859                 rc = -ENODEV;
860                 goto err_disable_device;
861         }
862 
863         /* Check for the proper subsystem IDs
864          * Intel uses a different SSID programming model than Compaq.
865          * For Intel, each SSID bit identifies a PHP capability.
866          * Also Intel HPCs may have RID=0.
867          */
868         if ((pdev->revision <= 2) && (vendor_id != PCI_VENDOR_ID_INTEL)) {
869                 err(msg_HPC_not_supported);
870                 return -ENODEV;
871         }
872 
873         /* TODO: This code can be made to support non-Compaq or Intel
874          * subsystem IDs
875          */
876         subsystem_vid = pdev->subsystem_vendor;
877         dbg("Subsystem Vendor ID: %x\n", subsystem_vid);
878         if ((subsystem_vid != PCI_VENDOR_ID_COMPAQ) && (subsystem_vid != PCI_VENDOR_ID_INTEL)) {
879                 err(msg_HPC_non_compaq_or_intel);
880                 rc = -ENODEV;
881                 goto err_disable_device;
882         }
883 
884         ctrl = kzalloc(sizeof(struct controller), GFP_KERNEL);
885         if (!ctrl) {
886                 err("%s : out of memory\n", __func__);
887                 rc = -ENOMEM;
888                 goto err_disable_device;
889         }
890 
891         subsystem_deviceid = pdev->subsystem_device;
892 
893         info("Hot Plug Subsystem Device ID: %x\n", subsystem_deviceid);
894 
895         /* Set Vendor ID, so it can be accessed later from other
896          * functions
897          */
898         ctrl->vendor_id = vendor_id;
899 
900         switch (subsystem_vid) {
901         case PCI_VENDOR_ID_COMPAQ:
902                 if (pdev->revision >= 0x13) { /* CIOBX */
903                         ctrl->push_flag = 1;
904                         ctrl->slot_switch_type = 1;
905                         ctrl->push_button = 1;
906                         ctrl->pci_config_space = 1;
907                         ctrl->defeature_PHP = 1;
908                         ctrl->pcix_support = 1;
909                         ctrl->pcix_speed_capability = 1;
910                         pci_read_config_byte(pdev, 0x41, &bus_cap);
911                         if (bus_cap & 0x80) {
912                                 dbg("bus max supports 133MHz PCI-X\n");
913                                 bus->max_bus_speed = PCI_SPEED_133MHz_PCIX;
914                                 break;
915                         }
916                         if (bus_cap & 0x40) {
917                                 dbg("bus max supports 100MHz PCI-X\n");
918                                 bus->max_bus_speed = PCI_SPEED_100MHz_PCIX;
919                                 break;
920                         }
921                         if (bus_cap & 0x20) {
922                                 dbg("bus max supports 66MHz PCI-X\n");
923                                 bus->max_bus_speed = PCI_SPEED_66MHz_PCIX;
924                                 break;
925                         }
926                         if (bus_cap & 0x10) {
927                                 dbg("bus max supports 66MHz PCI\n");
928                                 bus->max_bus_speed = PCI_SPEED_66MHz;
929                                 break;
930                         }
931 
932                         break;
933                 }
934 
935                 switch (subsystem_deviceid) {
936                 case PCI_SUB_HPC_ID:
937                         /* Original 6500/7000 implementation */
938                         ctrl->slot_switch_type = 1;
939                         bus->max_bus_speed = PCI_SPEED_33MHz;
940                         ctrl->push_button = 0;
941                         ctrl->pci_config_space = 1;
942                         ctrl->defeature_PHP = 1;
943                         ctrl->pcix_support = 0;
944                         ctrl->pcix_speed_capability = 0;
945                         break;
946                 case PCI_SUB_HPC_ID2:
947                         /* First Pushbutton implementation */
948                         ctrl->push_flag = 1;
949                         ctrl->slot_switch_type = 1;
950                         bus->max_bus_speed = PCI_SPEED_33MHz;
951                         ctrl->push_button = 1;
952                         ctrl->pci_config_space = 1;
953                         ctrl->defeature_PHP = 1;
954                         ctrl->pcix_support = 0;
955                         ctrl->pcix_speed_capability = 0;
956                         break;
957                 case PCI_SUB_HPC_ID_INTC:
958                         /* Third party (6500/7000) */
959                         ctrl->slot_switch_type = 1;
960                         bus->max_bus_speed = PCI_SPEED_33MHz;
961                         ctrl->push_button = 0;
962                         ctrl->pci_config_space = 1;
963                         ctrl->defeature_PHP = 1;
964                         ctrl->pcix_support = 0;
965                         ctrl->pcix_speed_capability = 0;
966                         break;
967                 case PCI_SUB_HPC_ID3:
968                         /* First 66 Mhz implementation */
969                         ctrl->push_flag = 1;
970                         ctrl->slot_switch_type = 1;
971                         bus->max_bus_speed = PCI_SPEED_66MHz;
972                         ctrl->push_button = 1;
973                         ctrl->pci_config_space = 1;
974                         ctrl->defeature_PHP = 1;
975                         ctrl->pcix_support = 0;
976                         ctrl->pcix_speed_capability = 0;
977                         break;
978                 case PCI_SUB_HPC_ID4:
979                         /* First PCI-X implementation, 100MHz */
980                         ctrl->push_flag = 1;
981                         ctrl->slot_switch_type = 1;
982                         bus->max_bus_speed = PCI_SPEED_100MHz_PCIX;
983                         ctrl->push_button = 1;
984                         ctrl->pci_config_space = 1;
985                         ctrl->defeature_PHP = 1;
986                         ctrl->pcix_support = 1;
987                         ctrl->pcix_speed_capability = 0;
988                         break;
989                 default:
990                         err(msg_HPC_not_supported);
991                         rc = -ENODEV;
992                         goto err_free_ctrl;
993                 }
994                 break;
995 
996         case PCI_VENDOR_ID_INTEL:
997                 /* Check for speed capability (0=33, 1=66) */
998                 if (subsystem_deviceid & 0x0001)
999                         bus->max_bus_speed = PCI_SPEED_66MHz;
1000                 else
1001                         bus->max_bus_speed = PCI_SPEED_33MHz;
1002 
1003                 /* Check for push button */
1004                 if (subsystem_deviceid & 0x0002)
1005                         ctrl->push_button = 0;
1006                 else
1007                         ctrl->push_button = 1;
1008 
1009                 /* Check for slot switch type (0=mechanical, 1=not mechanical) */
1010                 if (subsystem_deviceid & 0x0004)
1011                         ctrl->slot_switch_type = 0;
1012                 else
1013                         ctrl->slot_switch_type = 1;
1014 
1015                 /* PHP Status (0=De-feature PHP, 1=Normal operation) */
1016                 if (subsystem_deviceid & 0x0008)
1017                         ctrl->defeature_PHP = 1;        /* PHP supported */
1018                 else
1019                         ctrl->defeature_PHP = 0;        /* PHP not supported */
1020 
1021                 /* Alternate Base Address Register Interface
1022                  * (0=not supported, 1=supported)
1023                  */
1024                 if (subsystem_deviceid & 0x0010)
1025                         ctrl->alternate_base_address = 1;
1026                 else
1027                         ctrl->alternate_base_address = 0;
1028 
1029                 /* PCI Config Space Index (0=not supported, 1=supported) */
1030                 if (subsystem_deviceid & 0x0020)
1031                         ctrl->pci_config_space = 1;
1032                 else
1033                         ctrl->pci_config_space = 0;
1034 
1035                 /* PCI-X support */
1036                 if (subsystem_deviceid & 0x0080) {
1037                         ctrl->pcix_support = 1;
1038                         if (subsystem_deviceid & 0x0040)
1039                                 /* 133MHz PCI-X if bit 7 is 1 */
1040                                 ctrl->pcix_speed_capability = 1;
1041                         else
1042                                 /* 100MHz PCI-X if bit 7 is 1 and bit 0 is 0, */
1043                                 /* 66MHz PCI-X if bit 7 is 1 and bit 0 is 1 */
1044                                 ctrl->pcix_speed_capability = 0;
1045                 } else {
1046                         /* Conventional PCI */
1047                         ctrl->pcix_support = 0;
1048                         ctrl->pcix_speed_capability = 0;
1049                 }
1050                 break;
1051 
1052         default:
1053                 err(msg_HPC_not_supported);
1054                 rc = -ENODEV;
1055                 goto err_free_ctrl;
1056         }
1057 
1058         /* Tell the user that we found one. */
1059         info("Initializing the PCI hot plug controller residing on PCI bus %d\n",
1060                                         pdev->bus->number);
1061 
1062         dbg("Hotplug controller capabilities:\n");
1063         dbg("    speed_capability       %d\n", bus->max_bus_speed);
1064         dbg("    slot_switch_type       %s\n", ctrl->slot_switch_type ?
1065                                         "switch present" : "no switch");
1066         dbg("    defeature_PHP          %s\n", ctrl->defeature_PHP ?
1067                                         "PHP supported" : "PHP not supported");
1068         dbg("    alternate_base_address %s\n", ctrl->alternate_base_address ?
1069                                         "supported" : "not supported");
1070         dbg("    pci_config_space       %s\n", ctrl->pci_config_space ?
1071                                         "supported" : "not supported");
1072         dbg("    pcix_speed_capability  %s\n", ctrl->pcix_speed_capability ?
1073                                         "supported" : "not supported");
1074         dbg("    pcix_support           %s\n", ctrl->pcix_support ?
1075                                         "supported" : "not supported");
1076 
1077         ctrl->pci_dev = pdev;
1078         pci_set_drvdata(pdev, ctrl);
1079 
1080         /* make our own copy of the pci bus structure,
1081          * as we like tweaking it a lot */
1082         ctrl->pci_bus = kmemdup(pdev->bus, sizeof(*ctrl->pci_bus), GFP_KERNEL);
1083         if (!ctrl->pci_bus) {
1084                 err("out of memory\n");
1085                 rc = -ENOMEM;
1086                 goto err_free_ctrl;
1087         }
1088 
1089         ctrl->bus = pdev->bus->number;
1090         ctrl->rev = pdev->revision;
1091         dbg("bus device function rev: %d %d %d %d\n", ctrl->bus,
1092                 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn), ctrl->rev);
1093 
1094         mutex_init(&ctrl->crit_sect);
1095         init_waitqueue_head(&ctrl->queue);
1096 
1097         /* initialize our threads if they haven't already been started up */
1098         rc = one_time_init();
1099         if (rc)
1100                 goto err_free_bus;
1101 
1102         dbg("pdev = %p\n", pdev);
1103         dbg("pci resource start %llx\n", (unsigned long long)pci_resource_start(pdev, 0));
1104         dbg("pci resource len %llx\n", (unsigned long long)pci_resource_len(pdev, 0));
1105 
1106         if (!request_mem_region(pci_resource_start(pdev, 0),
1107                                 pci_resource_len(pdev, 0), MY_NAME)) {
1108                 err("cannot reserve MMIO region\n");
1109                 rc = -ENOMEM;
1110                 goto err_free_bus;
1111         }
1112 
1113         ctrl->hpc_reg = ioremap(pci_resource_start(pdev, 0),
1114                                         pci_resource_len(pdev, 0));
1115         if (!ctrl->hpc_reg) {
1116                 err("cannot remap MMIO region %llx @ %llx\n",
1117                     (unsigned long long)pci_resource_len(pdev, 0),
1118                     (unsigned long long)pci_resource_start(pdev, 0));
1119                 rc = -ENODEV;
1120                 goto err_free_mem_region;
1121         }
1122 
1123         /* Check for 66Mhz operation */
1124         bus->cur_bus_speed = get_controller_speed(ctrl);
1125 
1126 
1127         /********************************************************
1128          *
1129          *              Save configuration headers for this and
1130          *              subordinate PCI buses
1131          *
1132          ********************************************************/
1133 
1134         /* find the physical slot number of the first hot plug slot */
1135 
1136         /* Get slot won't work for devices behind bridges, but
1137          * in this case it will always be called for the "base"
1138          * bus/dev/func of a slot.
1139          * CS: this is leveraging the PCIIRQ routing code from the kernel
1140          * (pci-pc.c: get_irq_routing_table) */
1141         rc = get_slot_mapping(ctrl->pci_bus, pdev->bus->number,
1142                                 (readb(ctrl->hpc_reg + SLOT_MASK) >> 4),
1143                                 &(ctrl->first_slot));
1144         dbg("get_slot_mapping: first_slot = %d, returned = %d\n",
1145                                 ctrl->first_slot, rc);
1146         if (rc) {
1147                 err(msg_initialization_err, rc);
1148                 goto err_iounmap;
1149         }
1150 
1151         /* Store PCI Config Space for all devices on this bus */
1152         rc = cpqhp_save_config(ctrl, ctrl->bus, readb(ctrl->hpc_reg + SLOT_MASK));
1153         if (rc) {
1154                 err("%s: unable to save PCI configuration data, error %d\n",
1155                                 __func__, rc);
1156                 goto err_iounmap;
1157         }
1158 
1159         /*
1160          * Get IO, memory, and IRQ resources for new devices
1161          */
1162         /* The next line is required for cpqhp_find_available_resources */
1163         ctrl->interrupt = pdev->irq;
1164         if (ctrl->interrupt < 0x10) {
1165                 cpqhp_legacy_mode = 1;
1166                 dbg("System seems to be configured for Full Table Mapped MPS mode\n");
1167         }
1168 
1169         ctrl->cfgspc_irq = 0;
1170         pci_read_config_byte(pdev, PCI_INTERRUPT_LINE, &ctrl->cfgspc_irq);
1171 
1172         rc = cpqhp_find_available_resources(ctrl, cpqhp_rom_start);
1173         ctrl->add_support = !rc;
1174         if (rc) {
1175                 dbg("cpqhp_find_available_resources = 0x%x\n", rc);
1176                 err("unable to locate PCI configuration resources for hot plug add.\n");
1177                 goto err_iounmap;
1178         }
1179 
1180         /*
1181          * Finish setting up the hot plug ctrl device
1182          */
1183         ctrl->slot_device_offset = readb(ctrl->hpc_reg + SLOT_MASK) >> 4;
1184         dbg("NumSlots %d \n", ctrl->slot_device_offset);
1185 
1186         ctrl->next_event = 0;
1187 
1188         /* Setup the slot information structures */
1189         rc = ctrl_slot_setup(ctrl, smbios_start, smbios_table);
1190         if (rc) {
1191                 err(msg_initialization_err, 6);
1192                 err("%s: unable to save PCI configuration data, error %d\n",
1193                         __func__, rc);
1194                 goto err_iounmap;
1195         }
1196 
1197         /* Mask all general input interrupts */
1198         writel(0xFFFFFFFFL, ctrl->hpc_reg + INT_MASK);
1199 
1200         /* set up the interrupt */
1201         dbg("HPC interrupt = %d \n", ctrl->interrupt);
1202         if (request_irq(ctrl->interrupt, cpqhp_ctrl_intr,
1203                         IRQF_SHARED, MY_NAME, ctrl)) {
1204                 err("Can't get irq %d for the hotplug pci controller\n",
1205                         ctrl->interrupt);
1206                 rc = -ENODEV;
1207                 goto err_iounmap;
1208         }
1209 
1210         /* Enable Shift Out interrupt and clear it, also enable SERR on power
1211          * fault
1212          */
1213         temp_word = readw(ctrl->hpc_reg + MISC);
1214         temp_word |= 0x4006;
1215         writew(temp_word, ctrl->hpc_reg + MISC);
1216 
1217         /* Changed 05/05/97 to clear all interrupts at start */
1218         writel(0xFFFFFFFFL, ctrl->hpc_reg + INT_INPUT_CLEAR);
1219 
1220         ctrl->ctrl_int_comp = readl(ctrl->hpc_reg + INT_INPUT_CLEAR);
1221 
1222         writel(0x0L, ctrl->hpc_reg + INT_MASK);
1223 
1224         if (!cpqhp_ctrl_list) {
1225                 cpqhp_ctrl_list = ctrl;
1226                 ctrl->next = NULL;
1227         } else {
1228                 ctrl->next = cpqhp_ctrl_list;
1229                 cpqhp_ctrl_list = ctrl;
1230         }
1231 
1232         /* turn off empty slots here unless command line option "ON" set
1233          * Wait for exclusive access to hardware
1234          */
1235         mutex_lock(&ctrl->crit_sect);
1236 
1237         num_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0F;
1238 
1239         /* find first device number for the ctrl */
1240         device = readb(ctrl->hpc_reg + SLOT_MASK) >> 4;
1241 
1242         while (num_of_slots) {
1243                 dbg("num_of_slots: %d\n", num_of_slots);
1244                 func = cpqhp_slot_find(ctrl->bus, device, 0);
1245                 if (!func)
1246                         break;
1247 
1248                 hp_slot = func->device - ctrl->slot_device_offset;
1249                 dbg("hp_slot: %d\n", hp_slot);
1250 
1251                 /* We have to save the presence info for these slots */
1252                 temp_word = ctrl->ctrl_int_comp >> 16;
1253                 func->presence_save = (temp_word >> hp_slot) & 0x01;
1254                 func->presence_save |= (temp_word >> (hp_slot + 7)) & 0x02;
1255 
1256                 if (ctrl->ctrl_int_comp & (0x1L << hp_slot))
1257                         func->switch_save = 0;
1258                 else
1259                         func->switch_save = 0x10;
1260 
1261                 if (!power_mode)
1262                         if (!func->is_a_board) {
1263                                 green_LED_off(ctrl, hp_slot);
1264                                 slot_disable(ctrl, hp_slot);
1265                         }
1266 
1267                 device++;
1268                 num_of_slots--;
1269         }
1270 
1271         if (!power_mode) {
1272                 set_SOGO(ctrl);
1273                 /* Wait for SOBS to be unset */
1274                 wait_for_ctrl_irq(ctrl);
1275         }
1276 
1277         rc = init_SERR(ctrl);
1278         if (rc) {
1279                 err("init_SERR failed\n");
1280                 mutex_unlock(&ctrl->crit_sect);
1281                 goto err_free_irq;
1282         }
1283 
1284         /* Done with exclusive hardware access */
1285         mutex_unlock(&ctrl->crit_sect);
1286 
1287         cpqhp_create_debugfs_files(ctrl);
1288 
1289         return 0;
1290 
1291 err_free_irq:
1292         free_irq(ctrl->interrupt, ctrl);
1293 err_iounmap:
1294         iounmap(ctrl->hpc_reg);
1295 err_free_mem_region:
1296         release_mem_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
1297 err_free_bus:
1298         kfree(ctrl->pci_bus);
1299 err_free_ctrl:
1300         kfree(ctrl);
1301 err_disable_device:
1302         pci_disable_device(pdev);
1303         return rc;
1304 }
1305 
1306 static void __exit unload_cpqphpd(void)
1307 {
1308         struct pci_func *next;
1309         struct pci_func *TempSlot;
1310         int loop;
1311         u32 rc;
1312         struct controller *ctrl;
1313         struct controller *tctrl;
1314         struct pci_resource *res;
1315         struct pci_resource *tres;
1316 
1317         rc = compaq_nvram_store(cpqhp_rom_start);
1318 
1319         ctrl = cpqhp_ctrl_list;
1320 
1321         while (ctrl) {
1322                 if (ctrl->hpc_reg) {
1323                         u16 misc;
1324                         rc = read_slot_enable (ctrl);
1325 
1326                         writeb(0, ctrl->hpc_reg + SLOT_SERR);
1327                         writel(0xFFFFFFC0L | ~rc, ctrl->hpc_reg + INT_MASK);
1328 
1329                         misc = readw(ctrl->hpc_reg + MISC);
1330                         misc &= 0xFFFD;
1331                         writew(misc, ctrl->hpc_reg + MISC);
1332                 }
1333 
1334                 ctrl_slot_cleanup(ctrl);
1335 
1336                 res = ctrl->io_head;
1337                 while (res) {
1338                         tres = res;
1339                         res = res->next;
1340                         kfree(tres);
1341                 }
1342 
1343                 res = ctrl->mem_head;
1344                 while (res) {
1345                         tres = res;
1346                         res = res->next;
1347                         kfree(tres);
1348                 }
1349 
1350                 res = ctrl->p_mem_head;
1351                 while (res) {
1352                         tres = res;
1353                         res = res->next;
1354                         kfree(tres);
1355                 }
1356 
1357                 res = ctrl->bus_head;
1358                 while (res) {
1359                         tres = res;
1360                         res = res->next;
1361                         kfree(tres);
1362                 }
1363 
1364                 kfree (ctrl->pci_bus);
1365 
1366                 tctrl = ctrl;
1367                 ctrl = ctrl->next;
1368                 kfree(tctrl);
1369         }
1370 
1371         for (loop = 0; loop < 256; loop++) {
1372                 next = cpqhp_slot_list[loop];
1373                 while (next != NULL) {
1374                         res = next->io_head;
1375                         while (res) {
1376                                 tres = res;
1377                                 res = res->next;
1378                                 kfree(tres);
1379                         }
1380 
1381                         res = next->mem_head;
1382                         while (res) {
1383                                 tres = res;
1384                                 res = res->next;
1385                                 kfree(tres);
1386                         }
1387 
1388                         res = next->p_mem_head;
1389                         while (res) {
1390                                 tres = res;
1391                                 res = res->next;
1392                                 kfree(tres);
1393                         }
1394 
1395                         res = next->bus_head;
1396                         while (res) {
1397                                 tres = res;
1398                                 res = res->next;
1399                                 kfree(tres);
1400                         }
1401 
1402                         TempSlot = next;
1403                         next = next->next;
1404                         kfree(TempSlot);
1405                 }
1406         }
1407 
1408         /* Stop the notification mechanism */
1409         if (initialized)
1410                 cpqhp_event_stop_thread();
1411 
1412         /* unmap the rom address */
1413         if (cpqhp_rom_start)
1414                 iounmap(cpqhp_rom_start);
1415         if (smbios_start)
1416                 iounmap(smbios_start);
1417 }
1418 
1419 static struct pci_device_id hpcd_pci_tbl[] = {
1420         {
1421         /* handle any PCI Hotplug controller */
1422         .class =        ((PCI_CLASS_SYSTEM_PCI_HOTPLUG << 8) | 0x00),
1423         .class_mask =   ~0,
1424 
1425         /* no matter who makes it */
1426         .vendor =       PCI_ANY_ID,
1427         .device =       PCI_ANY_ID,
1428         .subvendor =    PCI_ANY_ID,
1429         .subdevice =    PCI_ANY_ID,
1430 
1431         }, { /* end: all zeroes */ }
1432 };
1433 
1434 MODULE_DEVICE_TABLE(pci, hpcd_pci_tbl);
1435 
1436 static struct pci_driver cpqhpc_driver = {
1437         .name =         "compaq_pci_hotplug",
1438         .id_table =     hpcd_pci_tbl,
1439         .probe =        cpqhpc_probe,
1440         /* remove:      cpqhpc_remove_one, */
1441 };
1442 
1443 static int __init cpqhpc_init(void)
1444 {
1445         int result;
1446 
1447         cpqhp_debug = debug;
1448 
1449         info (DRIVER_DESC " version: " DRIVER_VERSION "\n");
1450         cpqhp_initialize_debugfs();
1451         result = pci_register_driver(&cpqhpc_driver);
1452         dbg("pci_register_driver = %d\n", result);
1453         return result;
1454 }
1455 
1456 static void __exit cpqhpc_cleanup(void)
1457 {
1458         dbg("unload_cpqphpd()\n");
1459         unload_cpqphpd();
1460 
1461         dbg("pci_unregister_driver\n");
1462         pci_unregister_driver(&cpqhpc_driver);
1463         cpqhp_shutdown_debugfs();
1464 }
1465 
1466 module_init(cpqhpc_init);
1467 module_exit(cpqhpc_cleanup);
1468 

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