forked from beagleboard/linux
-
Notifications
You must be signed in to change notification settings - Fork 0
/
Copy pathcpqphp_core.c
1464 lines (1214 loc) · 35.6 KB
/
cpqphp_core.c
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
/*
* Compaq Hot Plug Controller Driver
*
* Copyright (C) 1995,2001 Compaq Computer Corporation
* Copyright (C) 2001 Greg Kroah-Hartman <[email protected]>
* Copyright (C) 2001 IBM Corp.
*
* All rights reserved.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or (at
* your option) any later version.
*
* This program is distributed in the hope that it will be useful, but
* WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
* NON INFRINGEMENT. See the GNU General Public License for more
* details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
*
* Send feedback to <[email protected]>
*
* Jan 12, 2003 - Added 66/100/133MHz PCI-X support,
* Torben Mathiasen <[email protected]>
*/
#include <linux/module.h>
#include <linux/moduleparam.h>
#include <linux/kernel.h>
#include <linux/types.h>
#include <linux/proc_fs.h>
#include <linux/slab.h>
#include <linux/workqueue.h>
#include <linux/pci.h>
#include <linux/pci_hotplug.h>
#include <linux/init.h>
#include <linux/interrupt.h>
#include <asm/uaccess.h>
#include "cpqphp.h"
#include "cpqphp_nvram.h"
/* Global variables */
int cpqhp_debug;
int cpqhp_legacy_mode;
struct controller *cpqhp_ctrl_list; /* = NULL */
struct pci_func *cpqhp_slot_list[256];
struct irq_routing_table *cpqhp_routing_table;
/* local variables */
static void __iomem *smbios_table;
static void __iomem *smbios_start;
static void __iomem *cpqhp_rom_start;
static bool power_mode;
static bool debug;
static int initialized;
#define DRIVER_VERSION "0.9.8"
#define DRIVER_AUTHOR "Dan Zink <[email protected]>, Greg Kroah-Hartman <[email protected]>"
#define DRIVER_DESC "Compaq Hot Plug PCI Controller Driver"
MODULE_AUTHOR(DRIVER_AUTHOR);
MODULE_DESCRIPTION(DRIVER_DESC);
MODULE_LICENSE("GPL");
module_param(power_mode, bool, 0644);
MODULE_PARM_DESC(power_mode, "Power mode enabled or not");
module_param(debug, bool, 0644);
MODULE_PARM_DESC(debug, "Debugging mode enabled or not");
#define CPQHPC_MODULE_MINOR 208
static inline int is_slot64bit(struct slot *slot)
{
return (readb(slot->p_sm_slot + SMBIOS_SLOT_WIDTH) == 0x06) ? 1 : 0;
}
static inline int is_slot66mhz(struct slot *slot)
{
return (readb(slot->p_sm_slot + SMBIOS_SLOT_TYPE) == 0x0E) ? 1 : 0;
}
/**
* detect_SMBIOS_pointer - find the System Management BIOS Table in mem region.
* @begin: begin pointer for region to be scanned.
* @end: end pointer for region to be scanned.
*
* Returns pointer to the head of the SMBIOS tables (or %NULL).
*/
static void __iomem * detect_SMBIOS_pointer(void __iomem *begin, void __iomem *end)
{
void __iomem *fp;
void __iomem *endp;
u8 temp1, temp2, temp3, temp4;
int status = 0;
endp = (end - sizeof(u32) + 1);
for (fp = begin; fp <= endp; fp += 16) {
temp1 = readb(fp);
temp2 = readb(fp+1);
temp3 = readb(fp+2);
temp4 = readb(fp+3);
if (temp1 == '_' &&
temp2 == 'S' &&
temp3 == 'M' &&
temp4 == '_') {
status = 1;
break;
}
}
if (!status)
fp = NULL;
dbg("Discovered SMBIOS Entry point at %p\n", fp);
return fp;
}
/**
* init_SERR - Initializes the per slot SERR generation.
* @ctrl: controller to use
*
* For unexpected switch opens
*/
static int init_SERR(struct controller * ctrl)
{
u32 tempdword;
u32 number_of_slots;
u8 physical_slot;
if (!ctrl)
return 1;
tempdword = ctrl->first_slot;
number_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0F;
/* Loop through slots */
while (number_of_slots) {
physical_slot = tempdword;
writeb(0, ctrl->hpc_reg + SLOT_SERR);
tempdword++;
number_of_slots--;
}
return 0;
}
static int init_cpqhp_routing_table(void)
{
int len;
cpqhp_routing_table = pcibios_get_irq_routing_table();
if (cpqhp_routing_table == NULL)
return -ENOMEM;
len = cpqhp_routing_table_length();
if (len == 0) {
kfree(cpqhp_routing_table);
cpqhp_routing_table = NULL;
return -1;
}
return 0;
}
/* nice debugging output */
static void pci_print_IRQ_route(void)
{
int len;
int loop;
u8 tbus, tdevice, tslot;
len = cpqhp_routing_table_length();
dbg("bus dev func slot\n");
for (loop = 0; loop < len; ++loop) {
tbus = cpqhp_routing_table->slots[loop].bus;
tdevice = cpqhp_routing_table->slots[loop].devfn;
tslot = cpqhp_routing_table->slots[loop].slot;
dbg("%d %d %d %d\n", tbus, tdevice >> 3, tdevice & 0x7, tslot);
}
return;
}
/**
* get_subsequent_smbios_entry: get the next entry from bios table.
* @smbios_start: where to start in the SMBIOS table
* @smbios_table: location of the SMBIOS table
* @curr: %NULL or pointer to previously returned structure
*
* Gets the first entry if previous == NULL;
* otherwise, returns the next entry.
* Uses global SMBIOS Table pointer.
*
* Returns a pointer to an SMBIOS structure or NULL if none found.
*/
static void __iomem *get_subsequent_smbios_entry(void __iomem *smbios_start,
void __iomem *smbios_table,
void __iomem *curr)
{
u8 bail = 0;
u8 previous_byte = 1;
void __iomem *p_temp;
void __iomem *p_max;
if (!smbios_table || !curr)
return NULL;
/* set p_max to the end of the table */
p_max = smbios_start + readw(smbios_table + ST_LENGTH);
p_temp = curr;
p_temp += readb(curr + SMBIOS_GENERIC_LENGTH);
while ((p_temp < p_max) && !bail) {
/* Look for the double NULL terminator
* The first condition is the previous byte
* and the second is the curr
*/
if (!previous_byte && !(readb(p_temp)))
bail = 1;
previous_byte = readb(p_temp);
p_temp++;
}
if (p_temp < p_max)
return p_temp;
else
return NULL;
}
/**
* get_SMBIOS_entry - return the requested SMBIOS entry or %NULL
* @smbios_start: where to start in the SMBIOS table
* @smbios_table: location of the SMBIOS table
* @type: SMBIOS structure type to be returned
* @previous: %NULL or pointer to previously returned structure
*
* Gets the first entry of the specified type if previous == %NULL;
* Otherwise, returns the next entry of the given type.
* Uses global SMBIOS Table pointer.
* Uses get_subsequent_smbios_entry.
*
* Returns a pointer to an SMBIOS structure or %NULL if none found.
*/
static void __iomem *get_SMBIOS_entry(void __iomem *smbios_start,
void __iomem *smbios_table,
u8 type,
void __iomem *previous)
{
if (!smbios_table)
return NULL;
if (!previous)
previous = smbios_start;
else
previous = get_subsequent_smbios_entry(smbios_start,
smbios_table, previous);
while (previous)
if (readb(previous + SMBIOS_GENERIC_TYPE) != type)
previous = get_subsequent_smbios_entry(smbios_start,
smbios_table, previous);
else
break;
return previous;
}
static void release_slot(struct hotplug_slot *hotplug_slot)
{
struct slot *slot = hotplug_slot->private;
dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
kfree(slot->hotplug_slot->info);
kfree(slot->hotplug_slot);
kfree(slot);
}
static int ctrl_slot_cleanup (struct controller * ctrl)
{
struct slot *old_slot, *next_slot;
old_slot = ctrl->slot;
ctrl->slot = NULL;
while (old_slot) {
/* memory will be freed by the release_slot callback */
next_slot = old_slot->next;
pci_hp_deregister (old_slot->hotplug_slot);
old_slot = next_slot;
}
cpqhp_remove_debugfs_files(ctrl);
/* Free IRQ associated with hot plug device */
free_irq(ctrl->interrupt, ctrl);
/* Unmap the memory */
iounmap(ctrl->hpc_reg);
/* Finally reclaim PCI mem */
release_mem_region(pci_resource_start(ctrl->pci_dev, 0),
pci_resource_len(ctrl->pci_dev, 0));
return 0;
}
/**
* get_slot_mapping - determine logical slot mapping for PCI device
*
* Won't work for more than one PCI-PCI bridge in a slot.
*
* @bus_num - bus number of PCI device
* @dev_num - device number of PCI device
* @slot - Pointer to u8 where slot number will be returned
*
* Output: SUCCESS or FAILURE
*/
static int
get_slot_mapping(struct pci_bus *bus, u8 bus_num, u8 dev_num, u8 *slot)
{
u32 work;
long len;
long loop;
u8 tbus, tdevice, tslot, bridgeSlot;
dbg("%s: %p, %d, %d, %p\n", __func__, bus, bus_num, dev_num, slot);
bridgeSlot = 0xFF;
len = cpqhp_routing_table_length();
for (loop = 0; loop < len; ++loop) {
tbus = cpqhp_routing_table->slots[loop].bus;
tdevice = cpqhp_routing_table->slots[loop].devfn >> 3;
tslot = cpqhp_routing_table->slots[loop].slot;
if ((tbus == bus_num) && (tdevice == dev_num)) {
*slot = tslot;
return 0;
} else {
/* Did not get a match on the target PCI device. Check
* if the current IRQ table entry is a PCI-to-PCI
* bridge device. If so, and it's secondary bus
* matches the bus number for the target device, I need
* to save the bridge's slot number. If I can not find
* an entry for the target device, I will have to
* assume it's on the other side of the bridge, and
* assign it the bridge's slot.
*/
bus->number = tbus;
pci_bus_read_config_dword(bus, PCI_DEVFN(tdevice, 0),
PCI_CLASS_REVISION, &work);
if ((work >> 8) == PCI_TO_PCI_BRIDGE_CLASS) {
pci_bus_read_config_dword(bus,
PCI_DEVFN(tdevice, 0),
PCI_PRIMARY_BUS, &work);
// See if bridge's secondary bus matches target bus.
if (((work >> 8) & 0x000000FF) == (long) bus_num)
bridgeSlot = tslot;
}
}
}
/* If we got here, we didn't find an entry in the IRQ mapping table for
* the target PCI device. If we did determine that the target device
* is on the other side of a PCI-to-PCI bridge, return the slot number
* for the bridge.
*/
if (bridgeSlot != 0xFF) {
*slot = bridgeSlot;
return 0;
}
/* Couldn't find an entry in the routing table for this PCI device */
return -1;
}
/**
* cpqhp_set_attention_status - Turns the Amber LED for a slot on or off
* @ctrl: struct controller to use
* @func: PCI device/function info
* @status: LED control flag: 1 = LED on, 0 = LED off
*/
static int
cpqhp_set_attention_status(struct controller *ctrl, struct pci_func *func,
u32 status)
{
u8 hp_slot;
if (func == NULL)
return 1;
hp_slot = func->device - ctrl->slot_device_offset;
/* Wait for exclusive access to hardware */
mutex_lock(&ctrl->crit_sect);
if (status == 1)
amber_LED_on (ctrl, hp_slot);
else if (status == 0)
amber_LED_off (ctrl, hp_slot);
else {
/* Done with exclusive hardware access */
mutex_unlock(&ctrl->crit_sect);
return 1;
}
set_SOGO(ctrl);
/* Wait for SOBS to be unset */
wait_for_ctrl_irq (ctrl);
/* Done with exclusive hardware access */
mutex_unlock(&ctrl->crit_sect);
return 0;
}
/**
* set_attention_status - Turns the Amber LED for a slot on or off
* @hotplug_slot: slot to change LED on
* @status: LED control flag
*/
static int set_attention_status (struct hotplug_slot *hotplug_slot, u8 status)
{
struct pci_func *slot_func;
struct slot *slot = hotplug_slot->private;
struct controller *ctrl = slot->ctrl;
u8 bus;
u8 devfn;
u8 device;
u8 function;
dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1)
return -ENODEV;
device = devfn >> 3;
function = devfn & 0x7;
dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function);
slot_func = cpqhp_slot_find(bus, device, function);
if (!slot_func)
return -ENODEV;
return cpqhp_set_attention_status(ctrl, slot_func, status);
}
static int process_SI(struct hotplug_slot *hotplug_slot)
{
struct pci_func *slot_func;
struct slot *slot = hotplug_slot->private;
struct controller *ctrl = slot->ctrl;
u8 bus;
u8 devfn;
u8 device;
u8 function;
dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1)
return -ENODEV;
device = devfn >> 3;
function = devfn & 0x7;
dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function);
slot_func = cpqhp_slot_find(bus, device, function);
if (!slot_func)
return -ENODEV;
slot_func->bus = bus;
slot_func->device = device;
slot_func->function = function;
slot_func->configured = 0;
dbg("board_added(%p, %p)\n", slot_func, ctrl);
return cpqhp_process_SI(ctrl, slot_func);
}
static int process_SS(struct hotplug_slot *hotplug_slot)
{
struct pci_func *slot_func;
struct slot *slot = hotplug_slot->private;
struct controller *ctrl = slot->ctrl;
u8 bus;
u8 devfn;
u8 device;
u8 function;
dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
if (cpqhp_get_bus_dev(ctrl, &bus, &devfn, slot->number) == -1)
return -ENODEV;
device = devfn >> 3;
function = devfn & 0x7;
dbg("bus, dev, fn = %d, %d, %d\n", bus, device, function);
slot_func = cpqhp_slot_find(bus, device, function);
if (!slot_func)
return -ENODEV;
dbg("In %s, slot_func = %p, ctrl = %p\n", __func__, slot_func, ctrl);
return cpqhp_process_SS(ctrl, slot_func);
}
static int hardware_test(struct hotplug_slot *hotplug_slot, u32 value)
{
struct slot *slot = hotplug_slot->private;
struct controller *ctrl = slot->ctrl;
dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
return cpqhp_hardware_test(ctrl, value);
}
static int get_power_status(struct hotplug_slot *hotplug_slot, u8 *value)
{
struct slot *slot = hotplug_slot->private;
struct controller *ctrl = slot->ctrl;
dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
*value = get_slot_enabled(ctrl, slot);
return 0;
}
static int get_attention_status(struct hotplug_slot *hotplug_slot, u8 *value)
{
struct slot *slot = hotplug_slot->private;
struct controller *ctrl = slot->ctrl;
dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
*value = cpq_get_attention_status(ctrl, slot);
return 0;
}
static int get_latch_status(struct hotplug_slot *hotplug_slot, u8 *value)
{
struct slot *slot = hotplug_slot->private;
struct controller *ctrl = slot->ctrl;
dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
*value = cpq_get_latch_status(ctrl, slot);
return 0;
}
static int get_adapter_status(struct hotplug_slot *hotplug_slot, u8 *value)
{
struct slot *slot = hotplug_slot->private;
struct controller *ctrl = slot->ctrl;
dbg("%s - physical_slot = %s\n", __func__, slot_name(slot));
*value = get_presence_status(ctrl, slot);
return 0;
}
static struct hotplug_slot_ops cpqphp_hotplug_slot_ops = {
.set_attention_status = set_attention_status,
.enable_slot = process_SI,
.disable_slot = process_SS,
.hardware_test = hardware_test,
.get_power_status = get_power_status,
.get_attention_status = get_attention_status,
.get_latch_status = get_latch_status,
.get_adapter_status = get_adapter_status,
};
#define SLOT_NAME_SIZE 10
static int ctrl_slot_setup(struct controller *ctrl,
void __iomem *smbios_start,
void __iomem *smbios_table)
{
struct slot *slot;
struct hotplug_slot *hotplug_slot;
struct hotplug_slot_info *hotplug_slot_info;
struct pci_bus *bus = ctrl->pci_bus;
u8 number_of_slots;
u8 slot_device;
u8 slot_number;
u8 ctrl_slot;
u32 tempdword;
char name[SLOT_NAME_SIZE];
void __iomem *slot_entry= NULL;
int result = -ENOMEM;
dbg("%s\n", __func__);
tempdword = readl(ctrl->hpc_reg + INT_INPUT_CLEAR);
number_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0F;
slot_device = readb(ctrl->hpc_reg + SLOT_MASK) >> 4;
slot_number = ctrl->first_slot;
while (number_of_slots) {
slot = kzalloc(sizeof(*slot), GFP_KERNEL);
if (!slot)
goto error;
slot->hotplug_slot = kzalloc(sizeof(*(slot->hotplug_slot)),
GFP_KERNEL);
if (!slot->hotplug_slot)
goto error_slot;
hotplug_slot = slot->hotplug_slot;
hotplug_slot->info = kzalloc(sizeof(*(hotplug_slot->info)),
GFP_KERNEL);
if (!hotplug_slot->info)
goto error_hpslot;
hotplug_slot_info = hotplug_slot->info;
slot->ctrl = ctrl;
slot->bus = ctrl->bus;
slot->device = slot_device;
slot->number = slot_number;
dbg("slot->number = %u\n", slot->number);
slot_entry = get_SMBIOS_entry(smbios_start, smbios_table, 9,
slot_entry);
while (slot_entry && (readw(slot_entry + SMBIOS_SLOT_NUMBER) !=
slot->number)) {
slot_entry = get_SMBIOS_entry(smbios_start,
smbios_table, 9, slot_entry);
}
slot->p_sm_slot = slot_entry;
init_timer(&slot->task_event);
slot->task_event.expires = jiffies + 5 * HZ;
slot->task_event.function = cpqhp_pushbutton_thread;
/*FIXME: these capabilities aren't used but if they are
* they need to be correctly implemented
*/
slot->capabilities |= PCISLOT_REPLACE_SUPPORTED;
slot->capabilities |= PCISLOT_INTERLOCK_SUPPORTED;
if (is_slot64bit(slot))
slot->capabilities |= PCISLOT_64_BIT_SUPPORTED;
if (is_slot66mhz(slot))
slot->capabilities |= PCISLOT_66_MHZ_SUPPORTED;
if (bus->cur_bus_speed == PCI_SPEED_66MHz)
slot->capabilities |= PCISLOT_66_MHZ_OPERATION;
ctrl_slot =
slot_device - (readb(ctrl->hpc_reg + SLOT_MASK) >> 4);
/* Check presence */
slot->capabilities |=
((((~tempdword) >> 23) |
((~tempdword) >> 15)) >> ctrl_slot) & 0x02;
/* Check the switch state */
slot->capabilities |=
((~tempdword & 0xFF) >> ctrl_slot) & 0x01;
/* Check the slot enable */
slot->capabilities |=
((read_slot_enable(ctrl) << 2) >> ctrl_slot) & 0x04;
/* register this slot with the hotplug pci core */
hotplug_slot->release = &release_slot;
hotplug_slot->private = slot;
snprintf(name, SLOT_NAME_SIZE, "%u", slot->number);
hotplug_slot->ops = &cpqphp_hotplug_slot_ops;
hotplug_slot_info->power_status = get_slot_enabled(ctrl, slot);
hotplug_slot_info->attention_status =
cpq_get_attention_status(ctrl, slot);
hotplug_slot_info->latch_status =
cpq_get_latch_status(ctrl, slot);
hotplug_slot_info->adapter_status =
get_presence_status(ctrl, slot);
dbg("registering bus %d, dev %d, number %d, "
"ctrl->slot_device_offset %d, slot %d\n",
slot->bus, slot->device,
slot->number, ctrl->slot_device_offset,
slot_number);
result = pci_hp_register(hotplug_slot,
ctrl->pci_dev->bus,
slot->device,
name);
if (result) {
err("pci_hp_register failed with error %d\n", result);
goto error_info;
}
slot->next = ctrl->slot;
ctrl->slot = slot;
number_of_slots--;
slot_device++;
slot_number++;
}
return 0;
error_info:
kfree(hotplug_slot_info);
error_hpslot:
kfree(hotplug_slot);
error_slot:
kfree(slot);
error:
return result;
}
static int one_time_init(void)
{
int loop;
int retval = 0;
if (initialized)
return 0;
power_mode = 0;
retval = init_cpqhp_routing_table();
if (retval)
goto error;
if (cpqhp_debug)
pci_print_IRQ_route();
dbg("Initialize + Start the notification mechanism \n");
retval = cpqhp_event_start_thread();
if (retval)
goto error;
dbg("Initialize slot lists\n");
for (loop = 0; loop < 256; loop++)
cpqhp_slot_list[loop] = NULL;
/* FIXME: We also need to hook the NMI handler eventually.
* this also needs to be worked with Christoph
* register_NMI_handler();
*/
/* Map rom address */
cpqhp_rom_start = ioremap(ROM_PHY_ADDR, ROM_PHY_LEN);
if (!cpqhp_rom_start) {
err ("Could not ioremap memory region for ROM\n");
retval = -EIO;
goto error;
}
/* Now, map the int15 entry point if we are on compaq specific
* hardware
*/
compaq_nvram_init(cpqhp_rom_start);
/* Map smbios table entry point structure */
smbios_table = detect_SMBIOS_pointer(cpqhp_rom_start,
cpqhp_rom_start + ROM_PHY_LEN);
if (!smbios_table) {
err ("Could not find the SMBIOS pointer in memory\n");
retval = -EIO;
goto error_rom_start;
}
smbios_start = ioremap(readl(smbios_table + ST_ADDRESS),
readw(smbios_table + ST_LENGTH));
if (!smbios_start) {
err ("Could not ioremap memory region taken from SMBIOS values\n");
retval = -EIO;
goto error_smbios_start;
}
initialized = 1;
return retval;
error_smbios_start:
iounmap(smbios_start);
error_rom_start:
iounmap(cpqhp_rom_start);
error:
return retval;
}
static int cpqhpc_probe(struct pci_dev *pdev, const struct pci_device_id *ent)
{
u8 num_of_slots = 0;
u8 hp_slot = 0;
u8 device;
u8 bus_cap;
u16 temp_word;
u16 vendor_id;
u16 subsystem_vid;
u16 subsystem_deviceid;
u32 rc;
struct controller *ctrl;
struct pci_func *func;
struct pci_bus *bus;
int err;
err = pci_enable_device(pdev);
if (err) {
printk(KERN_ERR MY_NAME ": cannot enable PCI device %s (%d)\n",
pci_name(pdev), err);
return err;
}
bus = pdev->subordinate;
if (!bus) {
dev_notice(&pdev->dev, "the device is not a bridge, "
"skipping\n");
rc = -ENODEV;
goto err_disable_device;
}
/* Need to read VID early b/c it's used to differentiate CPQ and INTC
* discovery
*/
vendor_id = pdev->vendor;
if ((vendor_id != PCI_VENDOR_ID_COMPAQ) &&
(vendor_id != PCI_VENDOR_ID_INTEL)) {
err(msg_HPC_non_compaq_or_intel);
rc = -ENODEV;
goto err_disable_device;
}
dbg("Vendor ID: %x\n", vendor_id);
dbg("revision: %d\n", pdev->revision);
if ((vendor_id == PCI_VENDOR_ID_COMPAQ) && (!pdev->revision)) {
err(msg_HPC_rev_error);
rc = -ENODEV;
goto err_disable_device;
}
/* Check for the proper subsystem ID's
* Intel uses a different SSID programming model than Compaq.
* For Intel, each SSID bit identifies a PHP capability.
* Also Intel HPC's may have RID=0.
*/
if ((pdev->revision <= 2) && (vendor_id != PCI_VENDOR_ID_INTEL)) {
err(msg_HPC_not_supported);
return -ENODEV;
}
/* TODO: This code can be made to support non-Compaq or Intel
* subsystem IDs
*/
subsystem_vid = pdev->subsystem_vendor;
dbg("Subsystem Vendor ID: %x\n", subsystem_vid);
if ((subsystem_vid != PCI_VENDOR_ID_COMPAQ) && (subsystem_vid != PCI_VENDOR_ID_INTEL)) {
err(msg_HPC_non_compaq_or_intel);
rc = -ENODEV;
goto err_disable_device;
}
ctrl = kzalloc(sizeof(struct controller), GFP_KERNEL);
if (!ctrl) {
err("%s : out of memory\n", __func__);
rc = -ENOMEM;
goto err_disable_device;
}
subsystem_deviceid = pdev->subsystem_device;
info("Hot Plug Subsystem Device ID: %x\n", subsystem_deviceid);
/* Set Vendor ID, so it can be accessed later from other
* functions
*/
ctrl->vendor_id = vendor_id;
switch (subsystem_vid) {
case PCI_VENDOR_ID_COMPAQ:
if (pdev->revision >= 0x13) { /* CIOBX */
ctrl->push_flag = 1;
ctrl->slot_switch_type = 1;
ctrl->push_button = 1;
ctrl->pci_config_space = 1;
ctrl->defeature_PHP = 1;
ctrl->pcix_support = 1;
ctrl->pcix_speed_capability = 1;
pci_read_config_byte(pdev, 0x41, &bus_cap);
if (bus_cap & 0x80) {
dbg("bus max supports 133MHz PCI-X\n");
bus->max_bus_speed = PCI_SPEED_133MHz_PCIX;
break;
}
if (bus_cap & 0x40) {
dbg("bus max supports 100MHz PCI-X\n");
bus->max_bus_speed = PCI_SPEED_100MHz_PCIX;
break;
}
if (bus_cap & 20) {
dbg("bus max supports 66MHz PCI-X\n");
bus->max_bus_speed = PCI_SPEED_66MHz_PCIX;
break;
}
if (bus_cap & 10) {
dbg("bus max supports 66MHz PCI\n");
bus->max_bus_speed = PCI_SPEED_66MHz;
break;
}
break;
}
switch (subsystem_deviceid) {
case PCI_SUB_HPC_ID:
/* Original 6500/7000 implementation */
ctrl->slot_switch_type = 1;
bus->max_bus_speed = PCI_SPEED_33MHz;
ctrl->push_button = 0;
ctrl->pci_config_space = 1;
ctrl->defeature_PHP = 1;
ctrl->pcix_support = 0;
ctrl->pcix_speed_capability = 0;
break;
case PCI_SUB_HPC_ID2:
/* First Pushbutton implementation */
ctrl->push_flag = 1;
ctrl->slot_switch_type = 1;
bus->max_bus_speed = PCI_SPEED_33MHz;
ctrl->push_button = 1;
ctrl->pci_config_space = 1;
ctrl->defeature_PHP = 1;
ctrl->pcix_support = 0;
ctrl->pcix_speed_capability = 0;
break;
case PCI_SUB_HPC_ID_INTC:
/* Third party (6500/7000) */
ctrl->slot_switch_type = 1;
bus->max_bus_speed = PCI_SPEED_33MHz;
ctrl->push_button = 0;
ctrl->pci_config_space = 1;
ctrl->defeature_PHP = 1;
ctrl->pcix_support = 0;
ctrl->pcix_speed_capability = 0;
break;
case PCI_SUB_HPC_ID3:
/* First 66 Mhz implementation */
ctrl->push_flag = 1;
ctrl->slot_switch_type = 1;
bus->max_bus_speed = PCI_SPEED_66MHz;
ctrl->push_button = 1;
ctrl->pci_config_space = 1;
ctrl->defeature_PHP = 1;
ctrl->pcix_support = 0;
ctrl->pcix_speed_capability = 0;
break;
case PCI_SUB_HPC_ID4:
/* First PCI-X implementation, 100MHz */
ctrl->push_flag = 1;
ctrl->slot_switch_type = 1;
bus->max_bus_speed = PCI_SPEED_100MHz_PCIX;
ctrl->push_button = 1;
ctrl->pci_config_space = 1;
ctrl->defeature_PHP = 1;
ctrl->pcix_support = 1;
ctrl->pcix_speed_capability = 0;
break;
default:
err(msg_HPC_not_supported);
rc = -ENODEV;
goto err_free_ctrl;
}
break;
case PCI_VENDOR_ID_INTEL:
/* Check for speed capability (0=33, 1=66) */
if (subsystem_deviceid & 0x0001)
bus->max_bus_speed = PCI_SPEED_66MHz;
else
bus->max_bus_speed = PCI_SPEED_33MHz;
/* Check for push button */
if (subsystem_deviceid & 0x0002)