Version:  2.0.40 2.2.26 2.4.37 2.6.39 3.0 3.1 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

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, "
710                                 "ctrl->slot_device_offset %d, slot %d\n",
711                                 slot->bus, slot->device,
712                                 slot->number, ctrl->slot_device_offset,
713                                 slot_number);
714                 result = pci_hp_register(hotplug_slot,
715                                          ctrl->pci_dev->bus,
716                                          slot->device,
717                                          name);
718                 if (result) {
719                         err("pci_hp_register failed with error %d\n", result);
720                         goto error_info;
721                 }
722 
723                 slot->next = ctrl->slot;
724                 ctrl->slot = slot;
725 
726                 number_of_slots--;
727                 slot_device++;
728                 slot_number++;
729         }
730 
731         return 0;
732 error_info:
733         kfree(hotplug_slot_info);
734 error_hpslot:
735         kfree(hotplug_slot);
736 error_slot:
737         kfree(slot);
738 error:
739         return result;
740 }
741 
742 static int one_time_init(void)
743 {
744         int loop;
745         int retval = 0;
746 
747         if (initialized)
748                 return 0;
749 
750         power_mode = 0;
751 
752         retval = init_cpqhp_routing_table();
753         if (retval)
754                 goto error;
755 
756         if (cpqhp_debug)
757                 pci_print_IRQ_route();
758 
759         dbg("Initialize + Start the notification mechanism \n");
760 
761         retval = cpqhp_event_start_thread();
762         if (retval)
763                 goto error;
764 
765         dbg("Initialize slot lists\n");
766         for (loop = 0; loop < 256; loop++)
767                 cpqhp_slot_list[loop] = NULL;
768 
769         /* FIXME: We also need to hook the NMI handler eventually.
770          * this also needs to be worked with Christoph
771          * register_NMI_handler();
772          */
773         /* Map rom address */
774         cpqhp_rom_start = ioremap(ROM_PHY_ADDR, ROM_PHY_LEN);
775         if (!cpqhp_rom_start) {
776                 err ("Could not ioremap memory region for ROM\n");
777                 retval = -EIO;
778                 goto error;
779         }
780 
781         /* Now, map the int15 entry point if we are on compaq specific
782          * hardware
783          */
784         compaq_nvram_init(cpqhp_rom_start);
785 
786         /* Map smbios table entry point structure */
787         smbios_table = detect_SMBIOS_pointer(cpqhp_rom_start,
788                                         cpqhp_rom_start + ROM_PHY_LEN);
789         if (!smbios_table) {
790                 err ("Could not find the SMBIOS pointer in memory\n");
791                 retval = -EIO;
792                 goto error_rom_start;
793         }
794 
795         smbios_start = ioremap(readl(smbios_table + ST_ADDRESS),
796                                         readw(smbios_table + ST_LENGTH));
797         if (!smbios_start) {
798                 err ("Could not ioremap memory region taken from SMBIOS values\n");
799                 retval = -EIO;
800                 goto error_smbios_start;
801         }
802 
803         initialized = 1;
804 
805         return retval;
806 
807 error_smbios_start:
808         iounmap(smbios_start);
809 error_rom_start:
810         iounmap(cpqhp_rom_start);
811 error:
812         return retval;
813 }
814 
815 static int cpqhpc_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
816 {
817         u8 num_of_slots = 0;
818         u8 hp_slot = 0;
819         u8 device;
820         u8 bus_cap;
821         u16 temp_word;
822         u16 vendor_id;
823         u16 subsystem_vid;
824         u16 subsystem_deviceid;
825         u32 rc;
826         struct controller *ctrl;
827         struct pci_func *func;
828         struct pci_bus *bus;
829         int err;
830 
831         err = pci_enable_device(pdev);
832         if (err) {
833                 printk(KERN_ERR MY_NAME ": cannot enable PCI device %s (%d)\n",
834                         pci_name(pdev), err);
835                 return err;
836         }
837 
838         bus = pdev->subordinate;
839         if (!bus) {
840                 dev_notice(&pdev->dev, "the device is not a bridge, "
841                                 "skipping\n");
842                 rc = -ENODEV;
843                 goto err_disable_device;
844         }
845 
846         /* Need to read VID early b/c it's used to differentiate CPQ and INTC
847          * discovery
848          */
849         vendor_id = pdev->vendor;
850         if ((vendor_id != PCI_VENDOR_ID_COMPAQ) &&
851             (vendor_id != PCI_VENDOR_ID_INTEL)) {
852                 err(msg_HPC_non_compaq_or_intel);
853                 rc = -ENODEV;
854                 goto err_disable_device;
855         }
856         dbg("Vendor ID: %x\n", vendor_id);
857 
858         dbg("revision: %d\n", pdev->revision);
859         if ((vendor_id == PCI_VENDOR_ID_COMPAQ) && (!pdev->revision)) {
860                 err(msg_HPC_rev_error);
861                 rc = -ENODEV;
862                 goto err_disable_device;
863         }
864 
865         /* Check for the proper subsystem IDs
866          * Intel uses a different SSID programming model than Compaq.
867          * For Intel, each SSID bit identifies a PHP capability.
868          * Also Intel HPCs may have RID=0.
869          */
870         if ((pdev->revision <= 2) && (vendor_id != PCI_VENDOR_ID_INTEL)) {
871                 err(msg_HPC_not_supported);
872                 return -ENODEV;
873         }
874 
875         /* TODO: This code can be made to support non-Compaq or Intel
876          * subsystem IDs
877          */
878         subsystem_vid = pdev->subsystem_vendor;
879         dbg("Subsystem Vendor ID: %x\n", subsystem_vid);
880         if ((subsystem_vid != PCI_VENDOR_ID_COMPAQ) && (subsystem_vid != PCI_VENDOR_ID_INTEL)) {
881                 err(msg_HPC_non_compaq_or_intel);
882                 rc = -ENODEV;
883                 goto err_disable_device;
884         }
885 
886         ctrl = kzalloc(sizeof(struct controller), GFP_KERNEL);
887         if (!ctrl) {
888                 err("%s : out of memory\n", __func__);
889                 rc = -ENOMEM;
890                 goto err_disable_device;
891         }
892 
893         subsystem_deviceid = pdev->subsystem_device;
894 
895         info("Hot Plug Subsystem Device ID: %x\n", subsystem_deviceid);
896 
897         /* Set Vendor ID, so it can be accessed later from other
898          * functions
899          */
900         ctrl->vendor_id = vendor_id;
901 
902         switch (subsystem_vid) {
903         case PCI_VENDOR_ID_COMPAQ:
904                 if (pdev->revision >= 0x13) { /* CIOBX */
905                         ctrl->push_flag = 1;
906                         ctrl->slot_switch_type = 1;
907                         ctrl->push_button = 1;
908                         ctrl->pci_config_space = 1;
909                         ctrl->defeature_PHP = 1;
910                         ctrl->pcix_support = 1;
911                         ctrl->pcix_speed_capability = 1;
912                         pci_read_config_byte(pdev, 0x41, &bus_cap);
913                         if (bus_cap & 0x80) {
914                                 dbg("bus max supports 133MHz PCI-X\n");
915                                 bus->max_bus_speed = PCI_SPEED_133MHz_PCIX;
916                                 break;
917                         }
918                         if (bus_cap & 0x40) {
919                                 dbg("bus max supports 100MHz PCI-X\n");
920                                 bus->max_bus_speed = PCI_SPEED_100MHz_PCIX;
921                                 break;
922                         }
923                         if (bus_cap & 0x20) {
924                                 dbg("bus max supports 66MHz PCI-X\n");
925                                 bus->max_bus_speed = PCI_SPEED_66MHz_PCIX;
926                                 break;
927                         }
928                         if (bus_cap & 0x10) {
929                                 dbg("bus max supports 66MHz PCI\n");
930                                 bus->max_bus_speed = PCI_SPEED_66MHz;
931                                 break;
932                         }
933 
934                         break;
935                 }
936 
937                 switch (subsystem_deviceid) {
938                 case PCI_SUB_HPC_ID:
939                         /* Original 6500/7000 implementation */
940                         ctrl->slot_switch_type = 1;
941                         bus->max_bus_speed = PCI_SPEED_33MHz;
942                         ctrl->push_button = 0;
943                         ctrl->pci_config_space = 1;
944                         ctrl->defeature_PHP = 1;
945                         ctrl->pcix_support = 0;
946                         ctrl->pcix_speed_capability = 0;
947                         break;
948                 case PCI_SUB_HPC_ID2:
949                         /* First Pushbutton implementation */
950                         ctrl->push_flag = 1;
951                         ctrl->slot_switch_type = 1;
952                         bus->max_bus_speed = PCI_SPEED_33MHz;
953                         ctrl->push_button = 1;
954                         ctrl->pci_config_space = 1;
955                         ctrl->defeature_PHP = 1;
956                         ctrl->pcix_support = 0;
957                         ctrl->pcix_speed_capability = 0;
958                         break;
959                 case PCI_SUB_HPC_ID_INTC:
960                         /* Third party (6500/7000) */
961                         ctrl->slot_switch_type = 1;
962                         bus->max_bus_speed = PCI_SPEED_33MHz;
963                         ctrl->push_button = 0;
964                         ctrl->pci_config_space = 1;
965                         ctrl->defeature_PHP = 1;
966                         ctrl->pcix_support = 0;
967                         ctrl->pcix_speed_capability = 0;
968                         break;
969                 case PCI_SUB_HPC_ID3:
970                         /* First 66 Mhz implementation */
971                         ctrl->push_flag = 1;
972                         ctrl->slot_switch_type = 1;
973                         bus->max_bus_speed = PCI_SPEED_66MHz;
974                         ctrl->push_button = 1;
975                         ctrl->pci_config_space = 1;
976                         ctrl->defeature_PHP = 1;
977                         ctrl->pcix_support = 0;
978                         ctrl->pcix_speed_capability = 0;
979                         break;
980                 case PCI_SUB_HPC_ID4:
981                         /* First PCI-X implementation, 100MHz */
982                         ctrl->push_flag = 1;
983                         ctrl->slot_switch_type = 1;
984                         bus->max_bus_speed = PCI_SPEED_100MHz_PCIX;
985                         ctrl->push_button = 1;
986                         ctrl->pci_config_space = 1;
987                         ctrl->defeature_PHP = 1;
988                         ctrl->pcix_support = 1;
989                         ctrl->pcix_speed_capability = 0;
990                         break;
991                 default:
992                         err(msg_HPC_not_supported);
993                         rc = -ENODEV;
994                         goto err_free_ctrl;
995                 }
996                 break;
997 
998         case PCI_VENDOR_ID_INTEL:
999                 /* Check for speed capability (0=33, 1=66) */
1000                 if (subsystem_deviceid & 0x0001)
1001                         bus->max_bus_speed = PCI_SPEED_66MHz;
1002                 else
1003                         bus->max_bus_speed = PCI_SPEED_33MHz;
1004 
1005                 /* Check for push button */
1006                 if (subsystem_deviceid & 0x0002)
1007                         ctrl->push_button = 0;
1008                 else
1009                         ctrl->push_button = 1;
1010 
1011                 /* Check for slot switch type (0=mechanical, 1=not mechanical) */
1012                 if (subsystem_deviceid & 0x0004)
1013                         ctrl->slot_switch_type = 0;
1014                 else
1015                         ctrl->slot_switch_type = 1;
1016 
1017                 /* PHP Status (0=De-feature PHP, 1=Normal operation) */
1018                 if (subsystem_deviceid & 0x0008)
1019                         ctrl->defeature_PHP = 1;        /* PHP supported */
1020                 else
1021                         ctrl->defeature_PHP = 0;        /* PHP not supported */
1022 
1023                 /* Alternate Base Address Register Interface
1024                  * (0=not supported, 1=supported)
1025                  */
1026                 if (subsystem_deviceid & 0x0010)
1027                         ctrl->alternate_base_address = 1;
1028                 else
1029                         ctrl->alternate_base_address = 0;
1030 
1031                 /* PCI Config Space Index (0=not supported, 1=supported) */
1032                 if (subsystem_deviceid & 0x0020)
1033                         ctrl->pci_config_space = 1;
1034                 else
1035                         ctrl->pci_config_space = 0;
1036 
1037                 /* PCI-X support */
1038                 if (subsystem_deviceid & 0x0080) {
1039                         ctrl->pcix_support = 1;
1040                         if (subsystem_deviceid & 0x0040)
1041                                 /* 133MHz PCI-X if bit 7 is 1 */
1042                                 ctrl->pcix_speed_capability = 1;
1043                         else
1044                                 /* 100MHz PCI-X if bit 7 is 1 and bit 0 is 0, */
1045                                 /* 66MHz PCI-X if bit 7 is 1 and bit 0 is 1 */
1046                                 ctrl->pcix_speed_capability = 0;
1047                 } else {
1048                         /* Conventional PCI */
1049                         ctrl->pcix_support = 0;
1050                         ctrl->pcix_speed_capability = 0;
1051                 }
1052                 break;
1053 
1054         default:
1055                 err(msg_HPC_not_supported);
1056                 rc = -ENODEV;
1057                 goto err_free_ctrl;
1058         }
1059 
1060         /* Tell the user that we found one. */
1061         info("Initializing the PCI hot plug controller residing on PCI bus %d\n",
1062                                         pdev->bus->number);
1063 
1064         dbg("Hotplug controller capabilities:\n");
1065         dbg("    speed_capability       %d\n", bus->max_bus_speed);
1066         dbg("    slot_switch_type       %s\n", ctrl->slot_switch_type ?
1067                                         "switch present" : "no switch");
1068         dbg("    defeature_PHP          %s\n", ctrl->defeature_PHP ?
1069                                         "PHP supported" : "PHP not supported");
1070         dbg("    alternate_base_address %s\n", ctrl->alternate_base_address ?
1071                                         "supported" : "not supported");
1072         dbg("    pci_config_space       %s\n", ctrl->pci_config_space ?
1073                                         "supported" : "not supported");
1074         dbg("    pcix_speed_capability  %s\n", ctrl->pcix_speed_capability ?
1075                                         "supported" : "not supported");
1076         dbg("    pcix_support           %s\n", ctrl->pcix_support ?
1077                                         "supported" : "not supported");
1078 
1079         ctrl->pci_dev = pdev;
1080         pci_set_drvdata(pdev, ctrl);
1081 
1082         /* make our own copy of the pci bus structure,
1083          * as we like tweaking it a lot */
1084         ctrl->pci_bus = kmemdup(pdev->bus, sizeof(*ctrl->pci_bus), GFP_KERNEL);
1085         if (!ctrl->pci_bus) {
1086                 err("out of memory\n");
1087                 rc = -ENOMEM;
1088                 goto err_free_ctrl;
1089         }
1090 
1091         ctrl->bus = pdev->bus->number;
1092         ctrl->rev = pdev->revision;
1093         dbg("bus device function rev: %d %d %d %d\n", ctrl->bus,
1094                 PCI_SLOT(pdev->devfn), PCI_FUNC(pdev->devfn), ctrl->rev);
1095 
1096         mutex_init(&ctrl->crit_sect);
1097         init_waitqueue_head(&ctrl->queue);
1098 
1099         /* initialize our threads if they haven't already been started up */
1100         rc = one_time_init();
1101         if (rc) {
1102                 goto err_free_bus;
1103         }
1104 
1105         dbg("pdev = %p\n", pdev);
1106         dbg("pci resource start %llx\n", (unsigned long long)pci_resource_start(pdev, 0));
1107         dbg("pci resource len %llx\n", (unsigned long long)pci_resource_len(pdev, 0));
1108 
1109         if (!request_mem_region(pci_resource_start(pdev, 0),
1110                                 pci_resource_len(pdev, 0), MY_NAME)) {
1111                 err("cannot reserve MMIO region\n");
1112                 rc = -ENOMEM;
1113                 goto err_free_bus;
1114         }
1115 
1116         ctrl->hpc_reg = ioremap(pci_resource_start(pdev, 0),
1117                                         pci_resource_len(pdev, 0));
1118         if (!ctrl->hpc_reg) {
1119                 err("cannot remap MMIO region %llx @ %llx\n",
1120                     (unsigned long long)pci_resource_len(pdev, 0),
1121                     (unsigned long long)pci_resource_start(pdev, 0));
1122                 rc = -ENODEV;
1123                 goto err_free_mem_region;
1124         }
1125 
1126         /* Check for 66Mhz operation */
1127         bus->cur_bus_speed = get_controller_speed(ctrl);
1128 
1129 
1130         /********************************************************
1131          *
1132          *              Save configuration headers for this and
1133          *              subordinate PCI buses
1134          *
1135          ********************************************************/
1136 
1137         /* find the physical slot number of the first hot plug slot */
1138 
1139         /* Get slot won't work for devices behind bridges, but
1140          * in this case it will always be called for the "base"
1141          * bus/dev/func of a slot.
1142          * CS: this is leveraging the PCIIRQ routing code from the kernel
1143          * (pci-pc.c: get_irq_routing_table) */
1144         rc = get_slot_mapping(ctrl->pci_bus, pdev->bus->number,
1145                                 (readb(ctrl->hpc_reg + SLOT_MASK) >> 4),
1146                                 &(ctrl->first_slot));
1147         dbg("get_slot_mapping: first_slot = %d, returned = %d\n",
1148                                 ctrl->first_slot, rc);
1149         if (rc) {
1150                 err(msg_initialization_err, rc);
1151                 goto err_iounmap;
1152         }
1153 
1154         /* Store PCI Config Space for all devices on this bus */
1155         rc = cpqhp_save_config(ctrl, ctrl->bus, readb(ctrl->hpc_reg + SLOT_MASK));
1156         if (rc) {
1157                 err("%s: unable to save PCI configuration data, error %d\n",
1158                                 __func__, rc);
1159                 goto err_iounmap;
1160         }
1161 
1162         /*
1163          * Get IO, memory, and IRQ resources for new devices
1164          */
1165         /* The next line is required for cpqhp_find_available_resources */
1166         ctrl->interrupt = pdev->irq;
1167         if (ctrl->interrupt < 0x10) {
1168                 cpqhp_legacy_mode = 1;
1169                 dbg("System seems to be configured for Full Table Mapped MPS mode\n");
1170         }
1171 
1172         ctrl->cfgspc_irq = 0;
1173         pci_read_config_byte(pdev, PCI_INTERRUPT_LINE, &ctrl->cfgspc_irq);
1174 
1175         rc = cpqhp_find_available_resources(ctrl, cpqhp_rom_start);
1176         ctrl->add_support = !rc;
1177         if (rc) {
1178                 dbg("cpqhp_find_available_resources = 0x%x\n", rc);
1179                 err("unable to locate PCI configuration resources for hot plug add.\n");
1180                 goto err_iounmap;
1181         }
1182 
1183         /*
1184          * Finish setting up the hot plug ctrl device
1185          */
1186         ctrl->slot_device_offset = readb(ctrl->hpc_reg + SLOT_MASK) >> 4;
1187         dbg("NumSlots %d \n", ctrl->slot_device_offset);
1188 
1189         ctrl->next_event = 0;
1190 
1191         /* Setup the slot information structures */
1192         rc = ctrl_slot_setup(ctrl, smbios_start, smbios_table);
1193         if (rc) {
1194                 err(msg_initialization_err, 6);
1195                 err("%s: unable to save PCI configuration data, error %d\n",
1196                         __func__, rc);
1197                 goto err_iounmap;
1198         }
1199 
1200         /* Mask all general input interrupts */
1201         writel(0xFFFFFFFFL, ctrl->hpc_reg + INT_MASK);
1202 
1203         /* set up the interrupt */
1204         dbg("HPC interrupt = %d \n", ctrl->interrupt);
1205         if (request_irq(ctrl->interrupt, cpqhp_ctrl_intr,
1206                         IRQF_SHARED, MY_NAME, ctrl)) {
1207                 err("Can't get irq %d for the hotplug pci controller\n",
1208                         ctrl->interrupt);
1209                 rc = -ENODEV;
1210                 goto err_iounmap;
1211         }
1212 
1213         /* Enable Shift Out interrupt and clear it, also enable SERR on power
1214          * fault
1215          */
1216         temp_word = readw(ctrl->hpc_reg + MISC);
1217         temp_word |= 0x4006;
1218         writew(temp_word, ctrl->hpc_reg + MISC);
1219 
1220         /* Changed 05/05/97 to clear all interrupts at start */
1221         writel(0xFFFFFFFFL, ctrl->hpc_reg + INT_INPUT_CLEAR);
1222 
1223         ctrl->ctrl_int_comp = readl(ctrl->hpc_reg + INT_INPUT_CLEAR);
1224 
1225         writel(0x0L, ctrl->hpc_reg + INT_MASK);
1226 
1227         if (!cpqhp_ctrl_list) {
1228                 cpqhp_ctrl_list = ctrl;
1229                 ctrl->next = NULL;
1230         } else {
1231                 ctrl->next = cpqhp_ctrl_list;
1232                 cpqhp_ctrl_list = ctrl;
1233         }
1234 
1235         /* turn off empty slots here unless command line option "ON" set
1236          * Wait for exclusive access to hardware
1237          */
1238         mutex_lock(&ctrl->crit_sect);
1239 
1240         num_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0F;
1241 
1242         /* find first device number for the ctrl */
1243         device = readb(ctrl->hpc_reg + SLOT_MASK) >> 4;
1244 
1245         while (num_of_slots) {
1246                 dbg("num_of_slots: %d\n", num_of_slots);
1247                 func = cpqhp_slot_find(ctrl->bus, device, 0);
1248                 if (!func)
1249                         break;
1250 
1251                 hp_slot = func->device - ctrl->slot_device_offset;
1252                 dbg("hp_slot: %d\n", hp_slot);
1253 
1254                 /* We have to save the presence info for these slots */
1255                 temp_word = ctrl->ctrl_int_comp >> 16;
1256                 func->presence_save = (temp_word >> hp_slot) & 0x01;
1257                 func->presence_save |= (temp_word >> (hp_slot + 7)) & 0x02;
1258 
1259                 if (ctrl->ctrl_int_comp & (0x1L << hp_slot))
1260                         func->switch_save = 0;
1261                 else
1262                         func->switch_save = 0x10;
1263 
1264                 if (!power_mode)
1265                         if (!func->is_a_board) {
1266                                 green_LED_off(ctrl, hp_slot);
1267                                 slot_disable(ctrl, hp_slot);
1268                         }
1269 
1270                 device++;
1271                 num_of_slots--;
1272         }
1273 
1274         if (!power_mode) {
1275                 set_SOGO(ctrl);
1276                 /* Wait for SOBS to be unset */
1277                 wait_for_ctrl_irq(ctrl);
1278         }
1279 
1280         rc = init_SERR(ctrl);
1281         if (rc) {
1282                 err("init_SERR failed\n");
1283                 mutex_unlock(&ctrl->crit_sect);
1284                 goto err_free_irq;
1285         }
1286 
1287         /* Done with exclusive hardware access */
1288         mutex_unlock(&ctrl->crit_sect);
1289 
1290         cpqhp_create_debugfs_files(ctrl);
1291 
1292         return 0;
1293 
1294 err_free_irq:
1295         free_irq(ctrl->interrupt, ctrl);
1296 err_iounmap:
1297         iounmap(ctrl->hpc_reg);
1298 err_free_mem_region:
1299         release_mem_region(pci_resource_start(pdev, 0), pci_resource_len(pdev, 0));
1300 err_free_bus:
1301         kfree(ctrl->pci_bus);
1302 err_free_ctrl:
1303         kfree(ctrl);
1304 err_disable_device:
1305         pci_disable_device(pdev);
1306         return rc;
1307 }
1308 
1309 static void __exit unload_cpqphpd(void)
1310 {
1311         struct pci_func *next;
1312         struct pci_func *TempSlot;
1313         int loop;
1314         u32 rc;
1315         struct controller *ctrl;
1316         struct controller *tctrl;
1317         struct pci_resource *res;
1318         struct pci_resource *tres;
1319 
1320         rc = compaq_nvram_store(cpqhp_rom_start);
1321 
1322         ctrl = cpqhp_ctrl_list;
1323 
1324         while (ctrl) {
1325                 if (ctrl->hpc_reg) {
1326                         u16 misc;
1327                         rc = read_slot_enable (ctrl);
1328 
1329                         writeb(0, ctrl->hpc_reg + SLOT_SERR);
1330                         writel(0xFFFFFFC0L | ~rc, ctrl->hpc_reg + INT_MASK);
1331 
1332                         misc = readw(ctrl->hpc_reg + MISC);
1333                         misc &= 0xFFFD;
1334                         writew(misc, ctrl->hpc_reg + MISC);
1335                 }
1336 
1337                 ctrl_slot_cleanup(ctrl);
1338 
1339                 res = ctrl->io_head;
1340                 while (res) {
1341                         tres = res;
1342                         res = res->next;
1343                         kfree(tres);
1344                 }
1345 
1346                 res = ctrl->mem_head;
1347                 while (res) {
1348                         tres = res;
1349                         res = res->next;
1350                         kfree(tres);
1351                 }
1352 
1353                 res = ctrl->p_mem_head;
1354                 while (res) {
1355                         tres = res;
1356                         res = res->next;
1357                         kfree(tres);
1358                 }
1359 
1360                 res = ctrl->bus_head;
1361                 while (res) {
1362                         tres = res;
1363                         res = res->next;
1364                         kfree(tres);
1365                 }
1366 
1367                 kfree (ctrl->pci_bus);
1368 
1369                 tctrl = ctrl;
1370                 ctrl = ctrl->next;
1371                 kfree(tctrl);
1372         }
1373 
1374         for (loop = 0; loop < 256; loop++) {
1375                 next = cpqhp_slot_list[loop];
1376                 while (next != NULL) {
1377                         res = next->io_head;
1378                         while (res) {
1379                                 tres = res;
1380                                 res = res->next;
1381                                 kfree(tres);
1382                         }
1383 
1384                         res = next->mem_head;
1385                         while (res) {
1386                                 tres = res;
1387                                 res = res->next;
1388                                 kfree(tres);
1389                         }
1390 
1391                         res = next->p_mem_head;
1392                         while (res) {
1393                                 tres = res;
1394                                 res = res->next;
1395                                 kfree(tres);
1396                         }
1397 
1398                         res = next->bus_head;
1399                         while (res) {
1400                                 tres = res;
1401                                 res = res->next;
1402                                 kfree(tres);
1403                         }
1404 
1405                         TempSlot = next;
1406                         next = next->next;
1407                         kfree(TempSlot);
1408                 }
1409         }
1410 
1411         /* Stop the notification mechanism */
1412         if (initialized)
1413                 cpqhp_event_stop_thread();
1414 
1415         /* unmap the rom address */
1416         if (cpqhp_rom_start)
1417                 iounmap(cpqhp_rom_start);
1418         if (smbios_start)
1419                 iounmap(smbios_start);
1420 }
1421 
1422 static struct pci_device_id hpcd_pci_tbl[] = {
1423         {
1424         /* handle any PCI Hotplug controller */
1425         .class =        ((PCI_CLASS_SYSTEM_PCI_HOTPLUG << 8) | 0x00),
1426         .class_mask =   ~0,
1427 
1428         /* no matter who makes it */
1429         .vendor =       PCI_ANY_ID,
1430         .device =       PCI_ANY_ID,
1431         .subvendor =    PCI_ANY_ID,
1432         .subdevice =    PCI_ANY_ID,
1433 
1434         }, { /* end: all zeroes */ }
1435 };
1436 
1437 MODULE_DEVICE_TABLE(pci, hpcd_pci_tbl);
1438 
1439 static struct pci_driver cpqhpc_driver = {
1440         .name =         "compaq_pci_hotplug",
1441         .id_table =     hpcd_pci_tbl,
1442         .probe =        cpqhpc_probe,
1443         /* remove:      cpqhpc_remove_one, */
1444 };
1445 
1446 static int __init cpqhpc_init(void)
1447 {
1448         int result;
1449 
1450         cpqhp_debug = debug;
1451 
1452         info (DRIVER_DESC " version: " DRIVER_VERSION "\n");
1453         cpqhp_initialize_debugfs();
1454         result = pci_register_driver(&cpqhpc_driver);
1455         dbg("pci_register_driver = %d\n", result);
1456         return result;
1457 }
1458 
1459 static void __exit cpqhpc_cleanup(void)
1460 {
1461         dbg("unload_cpqphpd()\n");
1462         unload_cpqphpd();
1463 
1464         dbg("pci_unregister_driver\n");
1465         pci_unregister_driver(&cpqhpc_driver);
1466         cpqhp_shutdown_debugfs();
1467 }
1468 
1469 module_init(cpqhpc_init);
1470 module_exit(cpqhpc_cleanup);
1471 

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