2 * Compaq Hot Plug Controller Driver
4 * Copyright (C) 1995,2001 Compaq Computer Corporation
5 * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
6 * Copyright (C) 2001 IBM Corp.
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.
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
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.
25 * Send feedback to <greg@kroah.com>
29 #include <linux/module.h>
30 #include <linux/kernel.h>
31 #include <linux/types.h>
32 #include <linux/slab.h>
33 #include <linux/workqueue.h>
34 #include <linux/interrupt.h>
35 #include <linux/delay.h>
36 #include <linux/wait.h>
37 #include <linux/smp_lock.h>
38 #include <linux/pci.h>
39 #include <linux/pci_hotplug.h>
40 #include <linux/kthread.h>
43 static u32
configure_new_device(struct controller
* ctrl
, struct pci_func
*func
,
44 u8 behind_bridge
, struct resource_lists
*resources
);
45 static int configure_new_function(struct controller
* ctrl
, struct pci_func
*func
,
46 u8 behind_bridge
, struct resource_lists
*resources
);
47 static void interrupt_event_handler(struct controller
*ctrl
);
50 static struct task_struct
*cpqhp_event_thread
;
51 static unsigned long pushbutton_pending
; /* = 0 */
53 /* delay is in jiffies to wait for */
54 static void long_delay(int delay
)
57 * XXX(hch): if someone is bored please convert all callers
58 * to call msleep_interruptible directly. They really want
59 * to specify timeouts in natural units and spend a lot of
60 * effort converting them to jiffies..
62 msleep_interruptible(jiffies_to_msecs(delay
));
66 /* FIXME: The following line needs to be somewhere else... */
67 #define WRONG_BUS_FREQUENCY 0x07
68 static u8
handle_switch_change(u8 change
, struct controller
* ctrl
)
73 struct pci_func
*func
;
74 struct event_info
*taskInfo
;
80 dbg("cpqsbd: Switch interrupt received.\n");
82 for (hp_slot
= 0; hp_slot
< 6; hp_slot
++) {
83 if (change
& (0x1L
<< hp_slot
)) {
87 func
= cpqhp_slot_find(ctrl
->bus
,
88 (hp_slot
+ ctrl
->slot_device_offset
), 0);
90 /* this is the structure that tells the worker thread
93 taskInfo
= &(ctrl
->event_queue
[ctrl
->next_event
]);
94 ctrl
->next_event
= (ctrl
->next_event
+ 1) % 10;
95 taskInfo
->hp_slot
= hp_slot
;
99 temp_word
= ctrl
->ctrl_int_comp
>> 16;
100 func
->presence_save
= (temp_word
>> hp_slot
) & 0x01;
101 func
->presence_save
|= (temp_word
>> (hp_slot
+ 7)) & 0x02;
103 if (ctrl
->ctrl_int_comp
& (0x1L
<< hp_slot
)) {
108 func
->switch_save
= 0;
110 taskInfo
->event_type
= INT_SWITCH_OPEN
;
116 func
->switch_save
= 0x10;
118 taskInfo
->event_type
= INT_SWITCH_CLOSE
;
127 * cpqhp_find_slot - find the struct slot of given device
128 * @ctrl: scan lots of this controller
129 * @device: the device id to find
131 static struct slot
*cpqhp_find_slot(struct controller
*ctrl
, u8 device
)
133 struct slot
*slot
= ctrl
->slot
;
135 while (slot
&& (slot
->device
!= device
))
142 static u8
handle_presence_change(u16 change
, struct controller
* ctrl
)
148 struct pci_func
*func
;
149 struct event_info
*taskInfo
;
158 dbg("cpqsbd: Presence/Notify input change.\n");
159 dbg(" Changed bits are 0x%4.4x\n", change
);
161 for (hp_slot
= 0; hp_slot
< 6; hp_slot
++) {
162 if (change
& (0x0101 << hp_slot
)) {
166 func
= cpqhp_slot_find(ctrl
->bus
,
167 (hp_slot
+ ctrl
->slot_device_offset
), 0);
169 taskInfo
= &(ctrl
->event_queue
[ctrl
->next_event
]);
170 ctrl
->next_event
= (ctrl
->next_event
+ 1) % 10;
171 taskInfo
->hp_slot
= hp_slot
;
175 p_slot
= cpqhp_find_slot(ctrl
, hp_slot
+ (readb(ctrl
->hpc_reg
+ SLOT_MASK
) >> 4));
179 /* If the switch closed, must be a button
180 * If not in button mode, nevermind
182 if (func
->switch_save
&& (ctrl
->push_button
== 1)) {
183 temp_word
= ctrl
->ctrl_int_comp
>> 16;
184 temp_byte
= (temp_word
>> hp_slot
) & 0x01;
185 temp_byte
|= (temp_word
>> (hp_slot
+ 7)) & 0x02;
187 if (temp_byte
!= func
->presence_save
) {
189 * button Pressed (doesn't do anything)
191 dbg("hp_slot %d button pressed\n", hp_slot
);
192 taskInfo
->event_type
= INT_BUTTON_PRESS
;
195 * button Released - TAKE ACTION!!!!
197 dbg("hp_slot %d button released\n", hp_slot
);
198 taskInfo
->event_type
= INT_BUTTON_RELEASE
;
200 /* Cancel if we are still blinking */
201 if ((p_slot
->state
== BLINKINGON_STATE
)
202 || (p_slot
->state
== BLINKINGOFF_STATE
)) {
203 taskInfo
->event_type
= INT_BUTTON_CANCEL
;
204 dbg("hp_slot %d button cancel\n", hp_slot
);
205 } else if ((p_slot
->state
== POWERON_STATE
)
206 || (p_slot
->state
== POWEROFF_STATE
)) {
207 /* info(msg_button_ignore, p_slot->number); */
208 taskInfo
->event_type
= INT_BUTTON_IGNORE
;
209 dbg("hp_slot %d button ignore\n", hp_slot
);
213 /* Switch is open, assume a presence change
214 * Save the presence state
216 temp_word
= ctrl
->ctrl_int_comp
>> 16;
217 func
->presence_save
= (temp_word
>> hp_slot
) & 0x01;
218 func
->presence_save
|= (temp_word
>> (hp_slot
+ 7)) & 0x02;
220 if ((!(ctrl
->ctrl_int_comp
& (0x010000 << hp_slot
))) ||
221 (!(ctrl
->ctrl_int_comp
& (0x01000000 << hp_slot
)))) {
223 taskInfo
->event_type
= INT_PRESENCE_ON
;
226 taskInfo
->event_type
= INT_PRESENCE_OFF
;
236 static u8
handle_power_fault(u8 change
, struct controller
* ctrl
)
240 struct pci_func
*func
;
241 struct event_info
*taskInfo
;
250 info("power fault interrupt\n");
252 for (hp_slot
= 0; hp_slot
< 6; hp_slot
++) {
253 if (change
& (0x01 << hp_slot
)) {
257 func
= cpqhp_slot_find(ctrl
->bus
,
258 (hp_slot
+ ctrl
->slot_device_offset
), 0);
260 taskInfo
= &(ctrl
->event_queue
[ctrl
->next_event
]);
261 ctrl
->next_event
= (ctrl
->next_event
+ 1) % 10;
262 taskInfo
->hp_slot
= hp_slot
;
266 if (ctrl
->ctrl_int_comp
& (0x00000100 << hp_slot
)) {
268 * power fault Cleared
272 taskInfo
->event_type
= INT_POWER_FAULT_CLEAR
;
277 taskInfo
->event_type
= INT_POWER_FAULT
;
280 amber_LED_on (ctrl
, hp_slot
);
281 green_LED_off (ctrl
, hp_slot
);
284 /* this is a fatal condition, we want
285 * to crash the machine to protect from
286 * data corruption. simulated_NMI
287 * shouldn't ever return */
289 simulated_NMI(hp_slot, ctrl); */
291 /* The following code causes a software
292 * crash just in case simulated_NMI did
295 panic(msg_power_fault); */
297 /* set power fault status for this board */
299 info("power fault bit %x set\n", hp_slot
);
310 * sort_by_size - sort nodes on the list by their length, smallest first.
311 * @head: list to sort
313 static int sort_by_size(struct pci_resource
**head
)
315 struct pci_resource
*current_res
;
316 struct pci_resource
*next_res
;
317 int out_of_order
= 1;
322 if (!((*head
)->next
))
325 while (out_of_order
) {
328 /* Special case for swapping list head */
329 if (((*head
)->next
) &&
330 ((*head
)->length
> (*head
)->next
->length
)) {
333 *head
= (*head
)->next
;
334 current_res
->next
= (*head
)->next
;
335 (*head
)->next
= current_res
;
340 while (current_res
->next
&& current_res
->next
->next
) {
341 if (current_res
->next
->length
> current_res
->next
->next
->length
) {
343 next_res
= current_res
->next
;
344 current_res
->next
= current_res
->next
->next
;
345 current_res
= current_res
->next
;
346 next_res
->next
= current_res
->next
;
347 current_res
->next
= next_res
;
349 current_res
= current_res
->next
;
351 } /* End of out_of_order loop */
358 * sort_by_max_size - sort nodes on the list by their length, largest first.
359 * @head: list to sort
361 static int sort_by_max_size(struct pci_resource
**head
)
363 struct pci_resource
*current_res
;
364 struct pci_resource
*next_res
;
365 int out_of_order
= 1;
370 if (!((*head
)->next
))
373 while (out_of_order
) {
376 /* Special case for swapping list head */
377 if (((*head
)->next
) &&
378 ((*head
)->length
< (*head
)->next
->length
)) {
381 *head
= (*head
)->next
;
382 current_res
->next
= (*head
)->next
;
383 (*head
)->next
= current_res
;
388 while (current_res
->next
&& current_res
->next
->next
) {
389 if (current_res
->next
->length
< current_res
->next
->next
->length
) {
391 next_res
= current_res
->next
;
392 current_res
->next
= current_res
->next
->next
;
393 current_res
= current_res
->next
;
394 next_res
->next
= current_res
->next
;
395 current_res
->next
= next_res
;
397 current_res
= current_res
->next
;
399 } /* End of out_of_order loop */
406 * do_pre_bridge_resource_split - find node of resources that are unused
407 * @head: new list head
408 * @orig_head: original list head
409 * @alignment: max node size (?)
411 static struct pci_resource
*do_pre_bridge_resource_split(struct pci_resource
**head
,
412 struct pci_resource
**orig_head
, u32 alignment
)
414 struct pci_resource
*prevnode
= NULL
;
415 struct pci_resource
*node
;
416 struct pci_resource
*split_node
;
419 dbg("do_pre_bridge_resource_split\n");
421 if (!(*head
) || !(*orig_head
))
424 rc
= cpqhp_resource_sort_and_combine(head
);
429 if ((*head
)->base
!= (*orig_head
)->base
)
432 if ((*head
)->length
== (*orig_head
)->length
)
436 /* If we got here, there the bridge requires some of the resource, but
437 * we may be able to split some off of the front
442 if (node
->length
& (alignment
-1)) {
443 /* this one isn't an aligned length, so we'll make a new entry
446 split_node
= kmalloc(sizeof(*split_node
), GFP_KERNEL
);
451 temp_dword
= (node
->length
| (alignment
-1)) + 1 - alignment
;
453 split_node
->base
= node
->base
;
454 split_node
->length
= temp_dword
;
456 node
->length
-= temp_dword
;
457 node
->base
+= split_node
->length
;
459 /* Put it in the list */
461 split_node
->next
= node
;
464 if (node
->length
< alignment
)
472 while (prevnode
->next
!= node
)
473 prevnode
= prevnode
->next
;
475 prevnode
->next
= node
->next
;
484 * do_bridge_resource_split - find one node of resources that aren't in use
486 * @alignment: max node size (?)
488 static struct pci_resource
*do_bridge_resource_split(struct pci_resource
**head
, u32 alignment
)
490 struct pci_resource
*prevnode
= NULL
;
491 struct pci_resource
*node
;
495 rc
= cpqhp_resource_sort_and_combine(head
);
508 if (node
->length
< alignment
)
511 if (node
->base
& (alignment
- 1)) {
512 /* Short circuit if adjusted size is too small */
513 temp_dword
= (node
->base
| (alignment
-1)) + 1;
514 if ((node
->length
- (temp_dword
- node
->base
)) < alignment
)
517 node
->length
-= (temp_dword
- node
->base
);
518 node
->base
= temp_dword
;
521 if (node
->length
& (alignment
- 1))
522 /* There's stuff in use after this node */
533 * get_io_resource - find first node of given size not in ISA aliasing window.
534 * @head: list to search
535 * @size: size of node to find, must be a power of two.
537 * Description: This function sorts the resource list by size and then returns
538 * returns the first node of "size" length that is not in the ISA aliasing
539 * window. If it finds a node larger than "size" it will split it up.
541 static struct pci_resource
*get_io_resource(struct pci_resource
**head
, u32 size
)
543 struct pci_resource
*prevnode
;
544 struct pci_resource
*node
;
545 struct pci_resource
*split_node
;
551 if (cpqhp_resource_sort_and_combine(head
))
554 if (sort_by_size(head
))
557 for (node
= *head
; node
; node
= node
->next
) {
558 if (node
->length
< size
)
561 if (node
->base
& (size
- 1)) {
562 /* this one isn't base aligned properly
563 * so we'll make a new entry and split it up
565 temp_dword
= (node
->base
| (size
-1)) + 1;
567 /* Short circuit if adjusted size is too small */
568 if ((node
->length
- (temp_dword
- node
->base
)) < size
)
571 split_node
= kmalloc(sizeof(*split_node
), GFP_KERNEL
);
576 split_node
->base
= node
->base
;
577 split_node
->length
= temp_dword
- node
->base
;
578 node
->base
= temp_dword
;
579 node
->length
-= split_node
->length
;
581 /* Put it in the list */
582 split_node
->next
= node
->next
;
583 node
->next
= split_node
;
584 } /* End of non-aligned base */
586 /* Don't need to check if too small since we already did */
587 if (node
->length
> size
) {
588 /* this one is longer than we need
589 * so we'll make a new entry and split it up
591 split_node
= kmalloc(sizeof(*split_node
), GFP_KERNEL
);
596 split_node
->base
= node
->base
+ size
;
597 split_node
->length
= node
->length
- size
;
600 /* Put it in the list */
601 split_node
->next
= node
->next
;
602 node
->next
= split_node
;
603 } /* End of too big on top end */
605 /* For IO make sure it's not in the ISA aliasing space */
606 if (node
->base
& 0x300L
)
609 /* If we got here, then it is the right size
610 * Now take it out of the list and break
616 while (prevnode
->next
!= node
)
617 prevnode
= prevnode
->next
;
619 prevnode
->next
= node
->next
;
630 * get_max_resource - get largest node which has at least the given size.
631 * @head: the list to search the node in
632 * @size: the minimum size of the node to find
634 * Description: Gets the largest node that is at least "size" big from the
635 * list pointed to by head. It aligns the node on top and bottom
636 * to "size" alignment before returning it.
638 static struct pci_resource
*get_max_resource(struct pci_resource
**head
, u32 size
)
640 struct pci_resource
*max
;
641 struct pci_resource
*temp
;
642 struct pci_resource
*split_node
;
645 if (cpqhp_resource_sort_and_combine(head
))
648 if (sort_by_max_size(head
))
651 for (max
= *head
; max
; max
= max
->next
) {
652 /* If not big enough we could probably just bail,
653 * instead we'll continue to the next.
655 if (max
->length
< size
)
658 if (max
->base
& (size
- 1)) {
659 /* this one isn't base aligned properly
660 * so we'll make a new entry and split it up
662 temp_dword
= (max
->base
| (size
-1)) + 1;
664 /* Short circuit if adjusted size is too small */
665 if ((max
->length
- (temp_dword
- max
->base
)) < size
)
668 split_node
= kmalloc(sizeof(*split_node
), GFP_KERNEL
);
673 split_node
->base
= max
->base
;
674 split_node
->length
= temp_dword
- max
->base
;
675 max
->base
= temp_dword
;
676 max
->length
-= split_node
->length
;
678 split_node
->next
= max
->next
;
679 max
->next
= split_node
;
682 if ((max
->base
+ max
->length
) & (size
- 1)) {
683 /* this one isn't end aligned properly at the top
684 * so we'll make a new entry and split it up
686 split_node
= kmalloc(sizeof(*split_node
), GFP_KERNEL
);
690 temp_dword
= ((max
->base
+ max
->length
) & ~(size
- 1));
691 split_node
->base
= temp_dword
;
692 split_node
->length
= max
->length
+ max
->base
694 max
->length
-= split_node
->length
;
696 split_node
->next
= max
->next
;
697 max
->next
= split_node
;
700 /* Make sure it didn't shrink too much when we aligned it */
701 if (max
->length
< size
)
704 /* Now take it out of the list */
709 while (temp
&& temp
->next
!= max
) {
713 temp
->next
= max
->next
;
725 * get_resource - find resource of given size and split up larger ones.
726 * @head: the list to search for resources
727 * @size: the size limit to use
729 * Description: This function sorts the resource list by size and then
730 * returns the first node of "size" length. If it finds a node
731 * larger than "size" it will split it up.
733 * size must be a power of two.
735 static struct pci_resource
*get_resource(struct pci_resource
**head
, u32 size
)
737 struct pci_resource
*prevnode
;
738 struct pci_resource
*node
;
739 struct pci_resource
*split_node
;
742 if (cpqhp_resource_sort_and_combine(head
))
745 if (sort_by_size(head
))
748 for (node
= *head
; node
; node
= node
->next
) {
749 dbg("%s: req_size =%x node=%p, base=%x, length=%x\n",
750 __func__
, size
, node
, node
->base
, node
->length
);
751 if (node
->length
< size
)
754 if (node
->base
& (size
- 1)) {
755 dbg("%s: not aligned\n", __func__
);
756 /* this one isn't base aligned properly
757 * so we'll make a new entry and split it up
759 temp_dword
= (node
->base
| (size
-1)) + 1;
761 /* Short circuit if adjusted size is too small */
762 if ((node
->length
- (temp_dword
- node
->base
)) < size
)
765 split_node
= kmalloc(sizeof(*split_node
), GFP_KERNEL
);
770 split_node
->base
= node
->base
;
771 split_node
->length
= temp_dword
- node
->base
;
772 node
->base
= temp_dword
;
773 node
->length
-= split_node
->length
;
775 split_node
->next
= node
->next
;
776 node
->next
= split_node
;
777 } /* End of non-aligned base */
779 /* Don't need to check if too small since we already did */
780 if (node
->length
> size
) {
781 dbg("%s: too big\n", __func__
);
782 /* this one is longer than we need
783 * so we'll make a new entry and split it up
785 split_node
= kmalloc(sizeof(*split_node
), GFP_KERNEL
);
790 split_node
->base
= node
->base
+ size
;
791 split_node
->length
= node
->length
- size
;
794 /* Put it in the list */
795 split_node
->next
= node
->next
;
796 node
->next
= split_node
;
797 } /* End of too big on top end */
799 dbg("%s: got one!!!\n", __func__
);
800 /* If we got here, then it is the right size
801 * Now take it out of the list */
806 while (prevnode
->next
!= node
)
807 prevnode
= prevnode
->next
;
809 prevnode
->next
= node
->next
;
819 * cpqhp_resource_sort_and_combine - sort nodes by base addresses and clean up
820 * @head: the list to sort and clean up
822 * Description: Sorts all of the nodes in the list in ascending order by
823 * their base addresses. Also does garbage collection by
824 * combining adjacent nodes.
826 * Returns %0 if success.
828 int cpqhp_resource_sort_and_combine(struct pci_resource
**head
)
830 struct pci_resource
*node1
;
831 struct pci_resource
*node2
;
832 int out_of_order
= 1;
834 dbg("%s: head = %p, *head = %p\n", __func__
, head
, *head
);
839 dbg("*head->next = %p\n",(*head
)->next
);
842 return 0; /* only one item on the list, already sorted! */
844 dbg("*head->base = 0x%x\n",(*head
)->base
);
845 dbg("*head->next->base = 0x%x\n",(*head
)->next
->base
);
846 while (out_of_order
) {
849 /* Special case for swapping list head */
850 if (((*head
)->next
) &&
851 ((*head
)->base
> (*head
)->next
->base
)) {
853 (*head
) = (*head
)->next
;
854 node1
->next
= (*head
)->next
;
855 (*head
)->next
= node1
;
861 while (node1
->next
&& node1
->next
->next
) {
862 if (node1
->next
->base
> node1
->next
->next
->base
) {
865 node1
->next
= node1
->next
->next
;
867 node2
->next
= node1
->next
;
872 } /* End of out_of_order loop */
876 while (node1
&& node1
->next
) {
877 if ((node1
->base
+ node1
->length
) == node1
->next
->base
) {
880 node1
->length
+= node1
->next
->length
;
882 node1
->next
= node1
->next
->next
;
892 irqreturn_t
cpqhp_ctrl_intr(int IRQ
, void *data
)
894 struct controller
*ctrl
= data
;
895 u8 schedule_flag
= 0;
902 misc
= readw(ctrl
->hpc_reg
+ MISC
);
904 * Check to see if it was our interrupt
906 if (!(misc
& 0x000C)) {
912 * Serial Output interrupt Pending
915 /* Clear the interrupt */
917 writew(misc
, ctrl
->hpc_reg
+ MISC
);
919 /* Read to clear posted writes */
920 misc
= readw(ctrl
->hpc_reg
+ MISC
);
922 dbg ("%s - waking up\n", __func__
);
923 wake_up_interruptible(&ctrl
->queue
);
927 /* General-interrupt-input interrupt Pending */
928 Diff
= readl(ctrl
->hpc_reg
+ INT_INPUT_CLEAR
) ^ ctrl
->ctrl_int_comp
;
930 ctrl
->ctrl_int_comp
= readl(ctrl
->hpc_reg
+ INT_INPUT_CLEAR
);
932 /* Clear the interrupt */
933 writel(Diff
, ctrl
->hpc_reg
+ INT_INPUT_CLEAR
);
935 /* Read it back to clear any posted writes */
936 temp_dword
= readl(ctrl
->hpc_reg
+ INT_INPUT_CLEAR
);
939 /* Clear all interrupts */
940 writel(0xFFFFFFFF, ctrl
->hpc_reg
+ INT_INPUT_CLEAR
);
942 schedule_flag
+= handle_switch_change((u8
)(Diff
& 0xFFL
), ctrl
);
943 schedule_flag
+= handle_presence_change((u16
)((Diff
& 0xFFFF0000L
) >> 16), ctrl
);
944 schedule_flag
+= handle_power_fault((u8
)((Diff
& 0xFF00L
) >> 8), ctrl
);
947 reset
= readb(ctrl
->hpc_reg
+ RESET_FREQ_MODE
);
949 /* Bus reset has completed */
951 writeb(reset
, ctrl
->hpc_reg
+ RESET_FREQ_MODE
);
952 reset
= readb(ctrl
->hpc_reg
+ RESET_FREQ_MODE
);
953 wake_up_interruptible(&ctrl
->queue
);
957 wake_up_process(cpqhp_event_thread
);
958 dbg("Waking even thread");
965 * cpqhp_slot_create - Creates a node and adds it to the proper bus.
966 * @busnumber: bus where new node is to be located
968 * Returns pointer to the new node or %NULL if unsuccessful.
970 struct pci_func
*cpqhp_slot_create(u8 busnumber
)
972 struct pci_func
*new_slot
;
973 struct pci_func
*next
;
975 new_slot
= kzalloc(sizeof(*new_slot
), GFP_KERNEL
);
976 if (new_slot
== NULL
)
979 new_slot
->next
= NULL
;
980 new_slot
->configured
= 1;
982 if (cpqhp_slot_list
[busnumber
] == NULL
) {
983 cpqhp_slot_list
[busnumber
] = new_slot
;
985 next
= cpqhp_slot_list
[busnumber
];
986 while (next
->next
!= NULL
)
988 next
->next
= new_slot
;
995 * slot_remove - Removes a node from the linked list of slots.
996 * @old_slot: slot to remove
998 * Returns %0 if successful, !0 otherwise.
1000 static int slot_remove(struct pci_func
* old_slot
)
1002 struct pci_func
*next
;
1004 if (old_slot
== NULL
)
1007 next
= cpqhp_slot_list
[old_slot
->bus
];
1011 if (next
== old_slot
) {
1012 cpqhp_slot_list
[old_slot
->bus
] = old_slot
->next
;
1013 cpqhp_destroy_board_resources(old_slot
);
1018 while ((next
->next
!= old_slot
) && (next
->next
!= NULL
))
1021 if (next
->next
== old_slot
) {
1022 next
->next
= old_slot
->next
;
1023 cpqhp_destroy_board_resources(old_slot
);
1032 * bridge_slot_remove - Removes a node from the linked list of slots.
1033 * @bridge: bridge to remove
1035 * Returns %0 if successful, !0 otherwise.
1037 static int bridge_slot_remove(struct pci_func
*bridge
)
1039 u8 subordinateBus
, secondaryBus
;
1041 struct pci_func
*next
;
1043 secondaryBus
= (bridge
->config_space
[0x06] >> 8) & 0xFF;
1044 subordinateBus
= (bridge
->config_space
[0x06] >> 16) & 0xFF;
1046 for (tempBus
= secondaryBus
; tempBus
<= subordinateBus
; tempBus
++) {
1047 next
= cpqhp_slot_list
[tempBus
];
1049 while (!slot_remove(next
))
1050 next
= cpqhp_slot_list
[tempBus
];
1053 next
= cpqhp_slot_list
[bridge
->bus
];
1058 if (next
== bridge
) {
1059 cpqhp_slot_list
[bridge
->bus
] = bridge
->next
;
1063 while ((next
->next
!= bridge
) && (next
->next
!= NULL
))
1066 if (next
->next
!= bridge
)
1068 next
->next
= bridge
->next
;
1076 * cpqhp_slot_find - Looks for a node by bus, and device, multiple functions accessed
1078 * @device: device to find
1079 * @index: is %0 for first function found, %1 for the second...
1081 * Returns pointer to the node if successful, %NULL otherwise.
1083 struct pci_func
*cpqhp_slot_find(u8 bus
, u8 device
, u8 index
)
1086 struct pci_func
*func
;
1088 func
= cpqhp_slot_list
[bus
];
1090 if ((func
== NULL
) || ((func
->device
== device
) && (index
== 0)))
1093 if (func
->device
== device
)
1096 while (func
->next
!= NULL
) {
1099 if (func
->device
== device
)
1110 /* DJZ: I don't think is_bridge will work as is.
1112 static int is_bridge(struct pci_func
* func
)
1114 /* Check the header type */
1115 if (((func
->config_space
[0x03] >> 16) & 0xFF) == 0x01)
1123 * set_controller_speed - set the frequency and/or mode of a specific controller segment.
1124 * @ctrl: controller to change frequency/mode for.
1125 * @adapter_speed: the speed of the adapter we want to match.
1126 * @hp_slot: the slot number where the adapter is installed.
1128 * Returns %0 if we successfully change frequency and/or mode to match the
1131 static u8
set_controller_speed(struct controller
*ctrl
, u8 adapter_speed
, u8 hp_slot
)
1135 u8 slot_power
= readb(ctrl
->hpc_reg
+ SLOT_POWER
);
1137 u32 leds
= readl(ctrl
->hpc_reg
+ LED_CONTROL
);
1139 if (ctrl
->speed
== adapter_speed
)
1142 /* We don't allow freq/mode changes if we find another adapter running
1143 * in another slot on this controller
1145 for(slot
= ctrl
->slot
; slot
; slot
= slot
->next
) {
1146 if (slot
->device
== (hp_slot
+ ctrl
->slot_device_offset
))
1148 if (!slot
->hotplug_slot
|| !slot
->hotplug_slot
->info
)
1150 if (slot
->hotplug_slot
->info
->adapter_status
== 0)
1152 /* If another adapter is running on the same segment but at a
1153 * lower speed/mode, we allow the new adapter to function at
1154 * this rate if supported
1156 if (ctrl
->speed
< adapter_speed
)
1162 /* If the controller doesn't support freq/mode changes and the
1163 * controller is running at a higher mode, we bail
1165 if ((ctrl
->speed
> adapter_speed
) && (!ctrl
->pcix_speed_capability
))
1168 /* But we allow the adapter to run at a lower rate if possible */
1169 if ((ctrl
->speed
< adapter_speed
) && (!ctrl
->pcix_speed_capability
))
1172 /* We try to set the max speed supported by both the adapter and
1175 if (ctrl
->speed_capability
< adapter_speed
) {
1176 if (ctrl
->speed
== ctrl
->speed_capability
)
1178 adapter_speed
= ctrl
->speed_capability
;
1181 writel(0x0L
, ctrl
->hpc_reg
+ LED_CONTROL
);
1182 writeb(0x00, ctrl
->hpc_reg
+ SLOT_ENABLE
);
1185 wait_for_ctrl_irq(ctrl
);
1187 if (adapter_speed
!= PCI_SPEED_133MHz_PCIX
)
1191 pci_write_config_byte(ctrl
->pci_dev
, 0x41, reg
);
1193 reg16
= readw(ctrl
->hpc_reg
+ NEXT_CURR_FREQ
);
1195 switch(adapter_speed
) {
1196 case(PCI_SPEED_133MHz_PCIX
):
1200 case(PCI_SPEED_100MHz_PCIX
):
1204 case(PCI_SPEED_66MHz_PCIX
):
1208 case(PCI_SPEED_66MHz
):
1212 default: /* 33MHz PCI 2.2 */
1218 writew(reg16
, ctrl
->hpc_reg
+ NEXT_CURR_FREQ
);
1222 /* Reenable interrupts */
1223 writel(0, ctrl
->hpc_reg
+ INT_MASK
);
1225 pci_write_config_byte(ctrl
->pci_dev
, 0x41, reg
);
1227 /* Restart state machine */
1229 pci_read_config_byte(ctrl
->pci_dev
, 0x43, ®
);
1230 pci_write_config_byte(ctrl
->pci_dev
, 0x43, reg
);
1232 /* Only if mode change...*/
1233 if (((ctrl
->speed
== PCI_SPEED_66MHz
) && (adapter_speed
== PCI_SPEED_66MHz_PCIX
)) ||
1234 ((ctrl
->speed
== PCI_SPEED_66MHz_PCIX
) && (adapter_speed
== PCI_SPEED_66MHz
)))
1237 wait_for_ctrl_irq(ctrl
);
1240 /* Restore LED/Slot state */
1241 writel(leds
, ctrl
->hpc_reg
+ LED_CONTROL
);
1242 writeb(slot_power
, ctrl
->hpc_reg
+ SLOT_ENABLE
);
1245 wait_for_ctrl_irq(ctrl
);
1247 ctrl
->speed
= adapter_speed
;
1248 slot
= cpqhp_find_slot(ctrl
, hp_slot
+ ctrl
->slot_device_offset
);
1250 info("Successfully changed frequency/mode for adapter in slot %d\n",
1255 /* the following routines constitute the bulk of the
1256 * hotplug controller logic
1261 * board_replaced - Called after a board has been replaced in the system.
1262 * @func: PCI device/function information
1263 * @ctrl: hotplug controller
1265 * This is only used if we don't have resources for hot add.
1266 * Turns power on for the board.
1267 * Checks to see if board is the same.
1268 * If board is same, reconfigures it.
1269 * If board isn't same, turns it back off.
1271 static u32
board_replaced(struct pci_func
*func
, struct controller
*ctrl
)
1278 hp_slot
= func
->device
- ctrl
->slot_device_offset
;
1281 * The switch is open.
1283 if (readl(ctrl
->hpc_reg
+ INT_INPUT_CLEAR
) & (0x01L
<< hp_slot
))
1284 rc
= INTERLOCK_OPEN
;
1286 * The board is already on
1288 else if (is_slot_enabled (ctrl
, hp_slot
))
1289 rc
= CARD_FUNCTIONING
;
1291 mutex_lock(&ctrl
->crit_sect
);
1293 /* turn on board without attaching to the bus */
1294 enable_slot_power (ctrl
, hp_slot
);
1298 /* Wait for SOBS to be unset */
1299 wait_for_ctrl_irq (ctrl
);
1301 /* Change bits in slot power register to force another shift out
1302 * NOTE: this is to work around the timer bug */
1303 temp_byte
= readb(ctrl
->hpc_reg
+ SLOT_POWER
);
1304 writeb(0x00, ctrl
->hpc_reg
+ SLOT_POWER
);
1305 writeb(temp_byte
, ctrl
->hpc_reg
+ SLOT_POWER
);
1309 /* Wait for SOBS to be unset */
1310 wait_for_ctrl_irq (ctrl
);
1312 adapter_speed
= get_adapter_speed(ctrl
, hp_slot
);
1313 if (ctrl
->speed
!= adapter_speed
)
1314 if (set_controller_speed(ctrl
, adapter_speed
, hp_slot
))
1315 rc
= WRONG_BUS_FREQUENCY
;
1317 /* turn off board without attaching to the bus */
1318 disable_slot_power (ctrl
, hp_slot
);
1322 /* Wait for SOBS to be unset */
1323 wait_for_ctrl_irq (ctrl
);
1325 mutex_unlock(&ctrl
->crit_sect
);
1330 mutex_lock(&ctrl
->crit_sect
);
1332 slot_enable (ctrl
, hp_slot
);
1333 green_LED_blink (ctrl
, hp_slot
);
1335 amber_LED_off (ctrl
, hp_slot
);
1339 /* Wait for SOBS to be unset */
1340 wait_for_ctrl_irq (ctrl
);
1342 mutex_unlock(&ctrl
->crit_sect
);
1344 /* Wait for ~1 second because of hot plug spec */
1347 /* Check for a power fault */
1348 if (func
->status
== 0xFF) {
1349 /* power fault occurred, but it was benign */
1353 rc
= cpqhp_valid_replace(ctrl
, func
);
1356 /* It must be the same board */
1358 rc
= cpqhp_configure_board(ctrl
, func
);
1360 /* If configuration fails, turn it off
1361 * Get slot won't work for devices behind
1362 * bridges, but in this case it will always be
1363 * called for the "base" bus/dev/func of an
1367 mutex_lock(&ctrl
->crit_sect
);
1369 amber_LED_on (ctrl
, hp_slot
);
1370 green_LED_off (ctrl
, hp_slot
);
1371 slot_disable (ctrl
, hp_slot
);
1375 /* Wait for SOBS to be unset */
1376 wait_for_ctrl_irq (ctrl
);
1378 mutex_unlock(&ctrl
->crit_sect
);
1386 /* Something is wrong
1388 * Get slot won't work for devices behind bridges, but
1389 * in this case it will always be called for the "base"
1390 * bus/dev/func of an adapter.
1393 mutex_lock(&ctrl
->crit_sect
);
1395 amber_LED_on (ctrl
, hp_slot
);
1396 green_LED_off (ctrl
, hp_slot
);
1397 slot_disable (ctrl
, hp_slot
);
1401 /* Wait for SOBS to be unset */
1402 wait_for_ctrl_irq (ctrl
);
1404 mutex_unlock(&ctrl
->crit_sect
);
1414 * board_added - Called after a board has been added to the system.
1415 * @func: PCI device/function info
1416 * @ctrl: hotplug controller
1418 * Turns power on for the board.
1421 static u32
board_added(struct pci_func
*func
, struct controller
*ctrl
)
1427 u32 temp_register
= 0xFFFFFFFF;
1429 struct pci_func
*new_slot
= NULL
;
1430 struct slot
*p_slot
;
1431 struct resource_lists res_lists
;
1433 hp_slot
= func
->device
- ctrl
->slot_device_offset
;
1434 dbg("%s: func->device, slot_offset, hp_slot = %d, %d ,%d\n",
1435 __func__
, func
->device
, ctrl
->slot_device_offset
, hp_slot
);
1437 mutex_lock(&ctrl
->crit_sect
);
1439 /* turn on board without attaching to the bus */
1440 enable_slot_power(ctrl
, hp_slot
);
1444 /* Wait for SOBS to be unset */
1445 wait_for_ctrl_irq (ctrl
);
1447 /* Change bits in slot power register to force another shift out
1448 * NOTE: this is to work around the timer bug
1450 temp_byte
= readb(ctrl
->hpc_reg
+ SLOT_POWER
);
1451 writeb(0x00, ctrl
->hpc_reg
+ SLOT_POWER
);
1452 writeb(temp_byte
, ctrl
->hpc_reg
+ SLOT_POWER
);
1456 /* Wait for SOBS to be unset */
1457 wait_for_ctrl_irq (ctrl
);
1459 adapter_speed
= get_adapter_speed(ctrl
, hp_slot
);
1460 if (ctrl
->speed
!= adapter_speed
)
1461 if (set_controller_speed(ctrl
, adapter_speed
, hp_slot
))
1462 rc
= WRONG_BUS_FREQUENCY
;
1464 /* turn off board without attaching to the bus */
1465 disable_slot_power (ctrl
, hp_slot
);
1469 /* Wait for SOBS to be unset */
1470 wait_for_ctrl_irq(ctrl
);
1472 mutex_unlock(&ctrl
->crit_sect
);
1477 p_slot
= cpqhp_find_slot(ctrl
, hp_slot
+ ctrl
->slot_device_offset
);
1479 /* turn on board and blink green LED */
1481 dbg("%s: before down\n", __func__
);
1482 mutex_lock(&ctrl
->crit_sect
);
1483 dbg("%s: after down\n", __func__
);
1485 dbg("%s: before slot_enable\n", __func__
);
1486 slot_enable (ctrl
, hp_slot
);
1488 dbg("%s: before green_LED_blink\n", __func__
);
1489 green_LED_blink (ctrl
, hp_slot
);
1491 dbg("%s: before amber_LED_blink\n", __func__
);
1492 amber_LED_off (ctrl
, hp_slot
);
1494 dbg("%s: before set_SOGO\n", __func__
);
1497 /* Wait for SOBS to be unset */
1498 dbg("%s: before wait_for_ctrl_irq\n", __func__
);
1499 wait_for_ctrl_irq (ctrl
);
1500 dbg("%s: after wait_for_ctrl_irq\n", __func__
);
1502 dbg("%s: before up\n", __func__
);
1503 mutex_unlock(&ctrl
->crit_sect
);
1504 dbg("%s: after up\n", __func__
);
1506 /* Wait for ~1 second because of hot plug spec */
1507 dbg("%s: before long_delay\n", __func__
);
1509 dbg("%s: after long_delay\n", __func__
);
1511 dbg("%s: func status = %x\n", __func__
, func
->status
);
1512 /* Check for a power fault */
1513 if (func
->status
== 0xFF) {
1514 /* power fault occurred, but it was benign */
1515 temp_register
= 0xFFFFFFFF;
1516 dbg("%s: temp register set to %x by power fault\n", __func__
, temp_register
);
1520 /* Get vendor/device ID u32 */
1521 ctrl
->pci_bus
->number
= func
->bus
;
1522 rc
= pci_bus_read_config_dword (ctrl
->pci_bus
, PCI_DEVFN(func
->device
, func
->function
), PCI_VENDOR_ID
, &temp_register
);
1523 dbg("%s: pci_read_config_dword returns %d\n", __func__
, rc
);
1524 dbg("%s: temp_register is %x\n", __func__
, temp_register
);
1527 /* Something's wrong here */
1528 temp_register
= 0xFFFFFFFF;
1529 dbg("%s: temp register set to %x by error\n", __func__
, temp_register
);
1531 /* Preset return code. It will be changed later if things go okay. */
1532 rc
= NO_ADAPTER_PRESENT
;
1535 /* All F's is an empty slot or an invalid board */
1536 if (temp_register
!= 0xFFFFFFFF) {
1537 res_lists
.io_head
= ctrl
->io_head
;
1538 res_lists
.mem_head
= ctrl
->mem_head
;
1539 res_lists
.p_mem_head
= ctrl
->p_mem_head
;
1540 res_lists
.bus_head
= ctrl
->bus_head
;
1541 res_lists
.irqs
= NULL
;
1543 rc
= configure_new_device(ctrl
, func
, 0, &res_lists
);
1545 dbg("%s: back from configure_new_device\n", __func__
);
1546 ctrl
->io_head
= res_lists
.io_head
;
1547 ctrl
->mem_head
= res_lists
.mem_head
;
1548 ctrl
->p_mem_head
= res_lists
.p_mem_head
;
1549 ctrl
->bus_head
= res_lists
.bus_head
;
1551 cpqhp_resource_sort_and_combine(&(ctrl
->mem_head
));
1552 cpqhp_resource_sort_and_combine(&(ctrl
->p_mem_head
));
1553 cpqhp_resource_sort_and_combine(&(ctrl
->io_head
));
1554 cpqhp_resource_sort_and_combine(&(ctrl
->bus_head
));
1557 mutex_lock(&ctrl
->crit_sect
);
1559 amber_LED_on (ctrl
, hp_slot
);
1560 green_LED_off (ctrl
, hp_slot
);
1561 slot_disable (ctrl
, hp_slot
);
1565 /* Wait for SOBS to be unset */
1566 wait_for_ctrl_irq (ctrl
);
1568 mutex_unlock(&ctrl
->crit_sect
);
1571 cpqhp_save_slot_config(ctrl
, func
);
1576 func
->switch_save
= 0x10;
1577 func
->is_a_board
= 0x01;
1579 /* next, we will instantiate the linux pci_dev structures (with
1580 * appropriate driver notification, if already present) */
1581 dbg("%s: configure linux pci_dev structure\n", __func__
);
1584 new_slot
= cpqhp_slot_find(ctrl
->bus
, func
->device
, index
++);
1585 if (new_slot
&& !new_slot
->pci_dev
)
1586 cpqhp_configure_device(ctrl
, new_slot
);
1589 mutex_lock(&ctrl
->crit_sect
);
1591 green_LED_on (ctrl
, hp_slot
);
1595 /* Wait for SOBS to be unset */
1596 wait_for_ctrl_irq (ctrl
);
1598 mutex_unlock(&ctrl
->crit_sect
);
1600 mutex_lock(&ctrl
->crit_sect
);
1602 amber_LED_on (ctrl
, hp_slot
);
1603 green_LED_off (ctrl
, hp_slot
);
1604 slot_disable (ctrl
, hp_slot
);
1608 /* Wait for SOBS to be unset */
1609 wait_for_ctrl_irq (ctrl
);
1611 mutex_unlock(&ctrl
->crit_sect
);
1620 * remove_board - Turns off slot and LEDs
1621 * @func: PCI device/function info
1622 * @replace_flag: whether replacing or adding a new device
1623 * @ctrl: target controller
1625 static u32
remove_board(struct pci_func
* func
, u32 replace_flag
, struct controller
* ctrl
)
1633 struct resource_lists res_lists
;
1634 struct pci_func
*temp_func
;
1636 if (cpqhp_unconfigure_device(func
))
1639 device
= func
->device
;
1641 hp_slot
= func
->device
- ctrl
->slot_device_offset
;
1642 dbg("In %s, hp_slot = %d\n", __func__
, hp_slot
);
1644 /* When we get here, it is safe to change base address registers.
1645 * We will attempt to save the base address register lengths */
1646 if (replace_flag
|| !ctrl
->add_support
)
1647 rc
= cpqhp_save_base_addr_length(ctrl
, func
);
1648 else if (!func
->bus_head
&& !func
->mem_head
&&
1649 !func
->p_mem_head
&& !func
->io_head
) {
1650 /* Here we check to see if we've saved any of the board's
1651 * resources already. If so, we'll skip the attempt to
1652 * determine what's being used. */
1654 temp_func
= cpqhp_slot_find(func
->bus
, func
->device
, index
++);
1656 if (temp_func
->bus_head
|| temp_func
->mem_head
1657 || temp_func
->p_mem_head
|| temp_func
->io_head
) {
1661 temp_func
= cpqhp_slot_find(temp_func
->bus
, temp_func
->device
, index
++);
1665 rc
= cpqhp_save_used_resources(ctrl
, func
);
1667 /* Change status to shutdown */
1668 if (func
->is_a_board
)
1669 func
->status
= 0x01;
1670 func
->configured
= 0;
1672 mutex_lock(&ctrl
->crit_sect
);
1674 green_LED_off (ctrl
, hp_slot
);
1675 slot_disable (ctrl
, hp_slot
);
1679 /* turn off SERR for slot */
1680 temp_byte
= readb(ctrl
->hpc_reg
+ SLOT_SERR
);
1681 temp_byte
&= ~(0x01 << hp_slot
);
1682 writeb(temp_byte
, ctrl
->hpc_reg
+ SLOT_SERR
);
1684 /* Wait for SOBS to be unset */
1685 wait_for_ctrl_irq (ctrl
);
1687 mutex_unlock(&ctrl
->crit_sect
);
1689 if (!replace_flag
&& ctrl
->add_support
) {
1691 res_lists
.io_head
= ctrl
->io_head
;
1692 res_lists
.mem_head
= ctrl
->mem_head
;
1693 res_lists
.p_mem_head
= ctrl
->p_mem_head
;
1694 res_lists
.bus_head
= ctrl
->bus_head
;
1696 cpqhp_return_board_resources(func
, &res_lists
);
1698 ctrl
->io_head
= res_lists
.io_head
;
1699 ctrl
->mem_head
= res_lists
.mem_head
;
1700 ctrl
->p_mem_head
= res_lists
.p_mem_head
;
1701 ctrl
->bus_head
= res_lists
.bus_head
;
1703 cpqhp_resource_sort_and_combine(&(ctrl
->mem_head
));
1704 cpqhp_resource_sort_and_combine(&(ctrl
->p_mem_head
));
1705 cpqhp_resource_sort_and_combine(&(ctrl
->io_head
));
1706 cpqhp_resource_sort_and_combine(&(ctrl
->bus_head
));
1708 if (is_bridge(func
)) {
1709 bridge_slot_remove(func
);
1713 func
= cpqhp_slot_find(ctrl
->bus
, device
, 0);
1716 /* Setup slot structure with entry for empty slot */
1717 func
= cpqhp_slot_create(ctrl
->bus
);
1722 func
->bus
= ctrl
->bus
;
1723 func
->device
= device
;
1725 func
->configured
= 0;
1726 func
->switch_save
= 0x10;
1727 func
->is_a_board
= 0;
1728 func
->p_task_event
= NULL
;
1734 static void pushbutton_helper_thread(unsigned long data
)
1736 pushbutton_pending
= data
;
1737 wake_up_process(cpqhp_event_thread
);
1741 /* this is the main worker thread */
1742 static int event_thread(void* data
)
1744 struct controller
*ctrl
;
1747 dbg("!!!!event_thread sleeping\n");
1748 set_current_state(TASK_INTERRUPTIBLE
);
1751 if (kthread_should_stop())
1754 if (pushbutton_pending
)
1755 cpqhp_pushbutton_thread(pushbutton_pending
);
1757 for (ctrl
= cpqhp_ctrl_list
; ctrl
; ctrl
=ctrl
->next
)
1758 interrupt_event_handler(ctrl
);
1760 dbg("event_thread signals exit\n");
1764 int cpqhp_event_start_thread(void)
1766 cpqhp_event_thread
= kthread_run(event_thread
, NULL
, "phpd_event");
1767 if (IS_ERR(cpqhp_event_thread
)) {
1768 err ("Can't start up our event thread\n");
1769 return PTR_ERR(cpqhp_event_thread
);
1776 void cpqhp_event_stop_thread(void)
1778 kthread_stop(cpqhp_event_thread
);
1782 static int update_slot_info(struct controller
*ctrl
, struct slot
*slot
)
1784 struct hotplug_slot_info
*info
;
1787 info
= kmalloc(sizeof(*info
), GFP_KERNEL
);
1791 info
->power_status
= get_slot_enabled(ctrl
, slot
);
1792 info
->attention_status
= cpq_get_attention_status(ctrl
, slot
);
1793 info
->latch_status
= cpq_get_latch_status(ctrl
, slot
);
1794 info
->adapter_status
= get_presence_status(ctrl
, slot
);
1795 result
= pci_hp_change_slot_info(slot
->hotplug_slot
, info
);
1800 static void interrupt_event_handler(struct controller
*ctrl
)
1804 struct pci_func
*func
;
1806 struct slot
*p_slot
;
1811 for (loop
= 0; loop
< 10; loop
++) {
1812 /* dbg("loop %d\n", loop); */
1813 if (ctrl
->event_queue
[loop
].event_type
!= 0) {
1814 hp_slot
= ctrl
->event_queue
[loop
].hp_slot
;
1816 func
= cpqhp_slot_find(ctrl
->bus
, (hp_slot
+ ctrl
->slot_device_offset
), 0);
1820 p_slot
= cpqhp_find_slot(ctrl
, hp_slot
+ ctrl
->slot_device_offset
);
1824 dbg("hp_slot %d, func %p, p_slot %p\n",
1825 hp_slot
, func
, p_slot
);
1827 if (ctrl
->event_queue
[loop
].event_type
== INT_BUTTON_PRESS
) {
1828 dbg("button pressed\n");
1829 } else if (ctrl
->event_queue
[loop
].event_type
==
1830 INT_BUTTON_CANCEL
) {
1831 dbg("button cancel\n");
1832 del_timer(&p_slot
->task_event
);
1834 mutex_lock(&ctrl
->crit_sect
);
1836 if (p_slot
->state
== BLINKINGOFF_STATE
) {
1838 dbg("turn on green LED\n");
1839 green_LED_on (ctrl
, hp_slot
);
1840 } else if (p_slot
->state
== BLINKINGON_STATE
) {
1842 dbg("turn off green LED\n");
1843 green_LED_off (ctrl
, hp_slot
);
1846 info(msg_button_cancel
, p_slot
->number
);
1848 p_slot
->state
= STATIC_STATE
;
1850 amber_LED_off (ctrl
, hp_slot
);
1854 /* Wait for SOBS to be unset */
1855 wait_for_ctrl_irq (ctrl
);
1857 mutex_unlock(&ctrl
->crit_sect
);
1859 /*** button Released (No action on press...) */
1860 else if (ctrl
->event_queue
[loop
].event_type
== INT_BUTTON_RELEASE
) {
1861 dbg("button release\n");
1863 if (is_slot_enabled (ctrl
, hp_slot
)) {
1864 dbg("slot is on\n");
1865 p_slot
->state
= BLINKINGOFF_STATE
;
1866 info(msg_button_off
, p_slot
->number
);
1868 dbg("slot is off\n");
1869 p_slot
->state
= BLINKINGON_STATE
;
1870 info(msg_button_on
, p_slot
->number
);
1872 mutex_lock(&ctrl
->crit_sect
);
1874 dbg("blink green LED and turn off amber\n");
1876 amber_LED_off (ctrl
, hp_slot
);
1877 green_LED_blink (ctrl
, hp_slot
);
1881 /* Wait for SOBS to be unset */
1882 wait_for_ctrl_irq (ctrl
);
1884 mutex_unlock(&ctrl
->crit_sect
);
1885 init_timer(&p_slot
->task_event
);
1886 p_slot
->hp_slot
= hp_slot
;
1887 p_slot
->ctrl
= ctrl
;
1888 /* p_slot->physical_slot = physical_slot; */
1889 p_slot
->task_event
.expires
= jiffies
+ 5 * HZ
; /* 5 second delay */
1890 p_slot
->task_event
.function
= pushbutton_helper_thread
;
1891 p_slot
->task_event
.data
= (u32
) p_slot
;
1893 dbg("add_timer p_slot = %p\n", p_slot
);
1894 add_timer(&p_slot
->task_event
);
1896 /***********POWER FAULT */
1897 else if (ctrl
->event_queue
[loop
].event_type
== INT_POWER_FAULT
) {
1898 dbg("power fault\n");
1900 /* refresh notification */
1902 update_slot_info(ctrl
, p_slot
);
1905 ctrl
->event_queue
[loop
].event_type
= 0;
1909 } /* End of FOR loop */
1917 * cpqhp_pushbutton_thread - handle pushbutton events
1918 * @slot: target slot (struct)
1920 * Scheduled procedure to handle blocking stuff for the pushbuttons.
1921 * Handles all pending events and exits.
1923 void cpqhp_pushbutton_thread(unsigned long slot
)
1927 struct pci_func
*func
;
1928 struct slot
*p_slot
= (struct slot
*) slot
;
1929 struct controller
*ctrl
= (struct controller
*) p_slot
->ctrl
;
1931 pushbutton_pending
= 0;
1932 hp_slot
= p_slot
->hp_slot
;
1934 device
= p_slot
->device
;
1936 if (is_slot_enabled(ctrl
, hp_slot
)) {
1937 p_slot
->state
= POWEROFF_STATE
;
1938 /* power Down board */
1939 func
= cpqhp_slot_find(p_slot
->bus
, p_slot
->device
, 0);
1940 dbg("In power_down_board, func = %p, ctrl = %p\n", func
, ctrl
);
1942 dbg("Error! func NULL in %s\n", __func__
);
1946 if (cpqhp_process_SS(ctrl
, func
) != 0) {
1947 amber_LED_on(ctrl
, hp_slot
);
1948 green_LED_on(ctrl
, hp_slot
);
1952 /* Wait for SOBS to be unset */
1953 wait_for_ctrl_irq(ctrl
);
1956 p_slot
->state
= STATIC_STATE
;
1958 p_slot
->state
= POWERON_STATE
;
1961 func
= cpqhp_slot_find(p_slot
->bus
, p_slot
->device
, 0);
1962 dbg("In add_board, func = %p, ctrl = %p\n", func
, ctrl
);
1964 dbg("Error! func NULL in %s\n", __func__
);
1969 if (cpqhp_process_SI(ctrl
, func
) != 0) {
1970 amber_LED_on(ctrl
, hp_slot
);
1971 green_LED_off(ctrl
, hp_slot
);
1975 /* Wait for SOBS to be unset */
1976 wait_for_ctrl_irq (ctrl
);
1980 p_slot
->state
= STATIC_STATE
;
1987 int cpqhp_process_SI(struct controller
*ctrl
, struct pci_func
*func
)
1993 struct slot
* p_slot
;
1994 int physical_slot
= 0;
1998 device
= func
->device
;
1999 hp_slot
= device
- ctrl
->slot_device_offset
;
2000 p_slot
= cpqhp_find_slot(ctrl
, device
);
2002 physical_slot
= p_slot
->number
;
2004 /* Check to see if the interlock is closed */
2005 tempdword
= readl(ctrl
->hpc_reg
+ INT_INPUT_CLEAR
);
2007 if (tempdword
& (0x01 << hp_slot
)) {
2011 if (func
->is_a_board
) {
2012 rc
= board_replaced(func
, ctrl
);
2017 func
= cpqhp_slot_create(ctrl
->bus
);
2021 func
->bus
= ctrl
->bus
;
2022 func
->device
= device
;
2024 func
->configured
= 0;
2025 func
->is_a_board
= 1;
2027 /* We have to save the presence info for these slots */
2028 temp_word
= ctrl
->ctrl_int_comp
>> 16;
2029 func
->presence_save
= (temp_word
>> hp_slot
) & 0x01;
2030 func
->presence_save
|= (temp_word
>> (hp_slot
+ 7)) & 0x02;
2032 if (ctrl
->ctrl_int_comp
& (0x1L
<< hp_slot
)) {
2033 func
->switch_save
= 0;
2035 func
->switch_save
= 0x10;
2038 rc
= board_added(func
, ctrl
);
2040 if (is_bridge(func
)) {
2041 bridge_slot_remove(func
);
2045 /* Setup slot structure with entry for empty slot */
2046 func
= cpqhp_slot_create(ctrl
->bus
);
2051 func
->bus
= ctrl
->bus
;
2052 func
->device
= device
;
2054 func
->configured
= 0;
2055 func
->is_a_board
= 0;
2057 /* We have to save the presence info for these slots */
2058 temp_word
= ctrl
->ctrl_int_comp
>> 16;
2059 func
->presence_save
= (temp_word
>> hp_slot
) & 0x01;
2060 func
->presence_save
|=
2061 (temp_word
>> (hp_slot
+ 7)) & 0x02;
2063 if (ctrl
->ctrl_int_comp
& (0x1L
<< hp_slot
)) {
2064 func
->switch_save
= 0;
2066 func
->switch_save
= 0x10;
2072 dbg("%s: rc = %d\n", __func__
, rc
);
2076 update_slot_info(ctrl
, p_slot
);
2082 int cpqhp_process_SS(struct controller
*ctrl
, struct pci_func
*func
)
2084 u8 device
, class_code
, header_type
, BCR
;
2089 struct slot
* p_slot
;
2090 struct pci_bus
*pci_bus
= ctrl
->pci_bus
;
2091 int physical_slot
=0;
2093 device
= func
->device
;
2094 func
= cpqhp_slot_find(ctrl
->bus
, device
, index
++);
2095 p_slot
= cpqhp_find_slot(ctrl
, device
);
2097 physical_slot
= p_slot
->number
;
2100 /* Make sure there are no video controllers here */
2101 while (func
&& !rc
) {
2102 pci_bus
->number
= func
->bus
;
2103 devfn
= PCI_DEVFN(func
->device
, func
->function
);
2105 /* Check the Class Code */
2106 rc
= pci_bus_read_config_byte (pci_bus
, devfn
, 0x0B, &class_code
);
2110 if (class_code
== PCI_BASE_CLASS_DISPLAY
) {
2111 /* Display/Video adapter (not supported) */
2112 rc
= REMOVE_NOT_SUPPORTED
;
2114 /* See if it's a bridge */
2115 rc
= pci_bus_read_config_byte (pci_bus
, devfn
, PCI_HEADER_TYPE
, &header_type
);
2119 /* If it's a bridge, check the VGA Enable bit */
2120 if ((header_type
& 0x7F) == PCI_HEADER_TYPE_BRIDGE
) {
2121 rc
= pci_bus_read_config_byte (pci_bus
, devfn
, PCI_BRIDGE_CONTROL
, &BCR
);
2125 /* If the VGA Enable bit is set, remove isn't
2127 if (BCR
& PCI_BRIDGE_CTL_VGA
)
2128 rc
= REMOVE_NOT_SUPPORTED
;
2132 func
= cpqhp_slot_find(ctrl
->bus
, device
, index
++);
2135 func
= cpqhp_slot_find(ctrl
->bus
, device
, 0);
2136 if ((func
!= NULL
) && !rc
) {
2137 /* FIXME: Replace flag should be passed into process_SS */
2138 replace_flag
= !(ctrl
->add_support
);
2139 rc
= remove_board(func
, replace_flag
, ctrl
);
2145 update_slot_info(ctrl
, p_slot
);
2151 * switch_leds - switch the leds, go from one site to the other.
2152 * @ctrl: controller to use
2153 * @num_of_slots: number of slots to use
2154 * @work_LED: LED control value
2155 * @direction: 1 to start from the left side, 0 to start right.
2157 static void switch_leds(struct controller
*ctrl
, const int num_of_slots
,
2158 u32
*work_LED
, const int direction
)
2162 for (loop
= 0; loop
< num_of_slots
; loop
++) {
2164 *work_LED
= *work_LED
>> 1;
2166 *work_LED
= *work_LED
<< 1;
2167 writel(*work_LED
, ctrl
->hpc_reg
+ LED_CONTROL
);
2171 /* Wait for SOGO interrupt */
2172 wait_for_ctrl_irq(ctrl
);
2174 /* Get ready for next iteration */
2175 long_delay((2*HZ
)/10);
2180 * cpqhp_hardware_test - runs hardware tests
2181 * @ctrl: target controller
2182 * @test_num: the number written to the "test" file in sysfs.
2184 * For hot plug ctrl folks to play with.
2186 int cpqhp_hardware_test(struct controller
*ctrl
, int test_num
)
2193 num_of_slots
= readb(ctrl
->hpc_reg
+ SLOT_MASK
) & 0x0f;
2197 /* Do stuff here! */
2199 /* Do that funky LED thing */
2200 /* so we can restore them later */
2201 save_LED
= readl(ctrl
->hpc_reg
+ LED_CONTROL
);
2202 work_LED
= 0x01010101;
2203 switch_leds(ctrl
, num_of_slots
, &work_LED
, 0);
2204 switch_leds(ctrl
, num_of_slots
, &work_LED
, 1);
2205 switch_leds(ctrl
, num_of_slots
, &work_LED
, 0);
2206 switch_leds(ctrl
, num_of_slots
, &work_LED
, 1);
2208 work_LED
= 0x01010000;
2209 writel(work_LED
, ctrl
->hpc_reg
+ LED_CONTROL
);
2210 switch_leds(ctrl
, num_of_slots
, &work_LED
, 0);
2211 switch_leds(ctrl
, num_of_slots
, &work_LED
, 1);
2212 work_LED
= 0x00000101;
2213 writel(work_LED
, ctrl
->hpc_reg
+ LED_CONTROL
);
2214 switch_leds(ctrl
, num_of_slots
, &work_LED
, 0);
2215 switch_leds(ctrl
, num_of_slots
, &work_LED
, 1);
2217 work_LED
= 0x01010000;
2218 writel(work_LED
, ctrl
->hpc_reg
+ LED_CONTROL
);
2219 for (loop
= 0; loop
< num_of_slots
; loop
++) {
2222 /* Wait for SOGO interrupt */
2223 wait_for_ctrl_irq (ctrl
);
2225 /* Get ready for next iteration */
2226 long_delay((3*HZ
)/10);
2227 work_LED
= work_LED
>> 16;
2228 writel(work_LED
, ctrl
->hpc_reg
+ LED_CONTROL
);
2232 /* Wait for SOGO interrupt */
2233 wait_for_ctrl_irq (ctrl
);
2235 /* Get ready for next iteration */
2236 long_delay((3*HZ
)/10);
2237 work_LED
= work_LED
<< 16;
2238 writel(work_LED
, ctrl
->hpc_reg
+ LED_CONTROL
);
2239 work_LED
= work_LED
<< 1;
2240 writel(work_LED
, ctrl
->hpc_reg
+ LED_CONTROL
);
2243 /* put it back the way it was */
2244 writel(save_LED
, ctrl
->hpc_reg
+ LED_CONTROL
);
2248 /* Wait for SOBS to be unset */
2249 wait_for_ctrl_irq (ctrl
);
2252 /* Do other stuff here! */
2263 * configure_new_device - Configures the PCI header information of one board.
2264 * @ctrl: pointer to controller structure
2265 * @func: pointer to function structure
2266 * @behind_bridge: 1 if this is a recursive call, 0 if not
2267 * @resources: pointer to set of resource lists
2269 * Returns 0 if success.
2271 static u32
configure_new_device(struct controller
* ctrl
, struct pci_func
* func
,
2272 u8 behind_bridge
, struct resource_lists
* resources
)
2274 u8 temp_byte
, function
, max_functions
, stop_it
;
2277 struct pci_func
*new_slot
;
2282 dbg("%s\n", __func__
);
2283 /* Check for Multi-function device */
2284 ctrl
->pci_bus
->number
= func
->bus
;
2285 rc
= pci_bus_read_config_byte (ctrl
->pci_bus
, PCI_DEVFN(func
->device
, func
->function
), 0x0E, &temp_byte
);
2287 dbg("%s: rc = %d\n", __func__
, rc
);
2291 if (temp_byte
& 0x80) /* Multi-function device */
2299 rc
= configure_new_function(ctrl
, new_slot
, behind_bridge
, resources
);
2302 dbg("configure_new_function failed %d\n",rc
);
2306 new_slot
= cpqhp_slot_find(new_slot
->bus
, new_slot
->device
, index
++);
2309 cpqhp_return_board_resources(new_slot
, resources
);
2319 /* The following loop skips to the next present function
2320 * and creates a board structure */
2322 while ((function
< max_functions
) && (!stop_it
)) {
2323 pci_bus_read_config_dword (ctrl
->pci_bus
, PCI_DEVFN(func
->device
, function
), 0x00, &ID
);
2325 if (ID
== 0xFFFFFFFF) {
2328 /* Setup slot structure. */
2329 new_slot
= cpqhp_slot_create(func
->bus
);
2331 if (new_slot
== NULL
)
2334 new_slot
->bus
= func
->bus
;
2335 new_slot
->device
= func
->device
;
2336 new_slot
->function
= function
;
2337 new_slot
->is_a_board
= 1;
2338 new_slot
->status
= 0;
2344 } while (function
< max_functions
);
2345 dbg("returning from configure_new_device\n");
2352 * Configuration logic that involves the hotplug data structures and
2358 * configure_new_function - Configures the PCI header information of one device
2359 * @ctrl: pointer to controller structure
2360 * @func: pointer to function structure
2361 * @behind_bridge: 1 if this is a recursive call, 0 if not
2362 * @resources: pointer to set of resource lists
2364 * Calls itself recursively for bridged devices.
2365 * Returns 0 if success.
2367 static int configure_new_function(struct controller
*ctrl
, struct pci_func
*func
,
2369 struct resource_lists
*resources
)
2384 struct pci_resource
*mem_node
;
2385 struct pci_resource
*p_mem_node
;
2386 struct pci_resource
*io_node
;
2387 struct pci_resource
*bus_node
;
2388 struct pci_resource
*hold_mem_node
;
2389 struct pci_resource
*hold_p_mem_node
;
2390 struct pci_resource
*hold_IO_node
;
2391 struct pci_resource
*hold_bus_node
;
2392 struct irq_mapping irqs
;
2393 struct pci_func
*new_slot
;
2394 struct pci_bus
*pci_bus
;
2395 struct resource_lists temp_resources
;
2397 pci_bus
= ctrl
->pci_bus
;
2398 pci_bus
->number
= func
->bus
;
2399 devfn
= PCI_DEVFN(func
->device
, func
->function
);
2401 /* Check for Bridge */
2402 rc
= pci_bus_read_config_byte(pci_bus
, devfn
, PCI_HEADER_TYPE
, &temp_byte
);
2406 if ((temp_byte
& 0x7F) == PCI_HEADER_TYPE_BRIDGE
) {
2407 /* set Primary bus */
2408 dbg("set Primary bus = %d\n", func
->bus
);
2409 rc
= pci_bus_write_config_byte(pci_bus
, devfn
, PCI_PRIMARY_BUS
, func
->bus
);
2413 /* find range of busses to use */
2414 dbg("find ranges of buses to use\n");
2415 bus_node
= get_max_resource(&(resources
->bus_head
), 1);
2417 /* If we don't have any busses to allocate, we can't continue */
2421 /* set Secondary bus */
2422 temp_byte
= bus_node
->base
;
2423 dbg("set Secondary bus = %d\n", bus_node
->base
);
2424 rc
= pci_bus_write_config_byte(pci_bus
, devfn
, PCI_SECONDARY_BUS
, temp_byte
);
2428 /* set subordinate bus */
2429 temp_byte
= bus_node
->base
+ bus_node
->length
- 1;
2430 dbg("set subordinate bus = %d\n", bus_node
->base
+ bus_node
->length
- 1);
2431 rc
= pci_bus_write_config_byte(pci_bus
, devfn
, PCI_SUBORDINATE_BUS
, temp_byte
);
2435 /* set subordinate Latency Timer and base Latency Timer */
2437 rc
= pci_bus_write_config_byte(pci_bus
, devfn
, PCI_SEC_LATENCY_TIMER
, temp_byte
);
2440 rc
= pci_bus_write_config_byte(pci_bus
, devfn
, PCI_LATENCY_TIMER
, temp_byte
);
2444 /* set Cache Line size */
2446 rc
= pci_bus_write_config_byte(pci_bus
, devfn
, PCI_CACHE_LINE_SIZE
, temp_byte
);
2450 /* Setup the IO, memory, and prefetchable windows */
2451 io_node
= get_max_resource(&(resources
->io_head
), 0x1000);
2454 mem_node
= get_max_resource(&(resources
->mem_head
), 0x100000);
2457 p_mem_node
= get_max_resource(&(resources
->p_mem_head
), 0x100000);
2460 dbg("Setup the IO, memory, and prefetchable windows\n");
2462 dbg("(base, len, next) (%x, %x, %p)\n", io_node
->base
,
2463 io_node
->length
, io_node
->next
);
2465 dbg("(base, len, next) (%x, %x, %p)\n", mem_node
->base
,
2466 mem_node
->length
, mem_node
->next
);
2467 dbg("p_mem_node\n");
2468 dbg("(base, len, next) (%x, %x, %p)\n", p_mem_node
->base
,
2469 p_mem_node
->length
, p_mem_node
->next
);
2471 /* set up the IRQ info */
2472 if (!resources
->irqs
) {
2473 irqs
.barber_pole
= 0;
2474 irqs
.interrupt
[0] = 0;
2475 irqs
.interrupt
[1] = 0;
2476 irqs
.interrupt
[2] = 0;
2477 irqs
.interrupt
[3] = 0;
2480 irqs
.barber_pole
= resources
->irqs
->barber_pole
;
2481 irqs
.interrupt
[0] = resources
->irqs
->interrupt
[0];
2482 irqs
.interrupt
[1] = resources
->irqs
->interrupt
[1];
2483 irqs
.interrupt
[2] = resources
->irqs
->interrupt
[2];
2484 irqs
.interrupt
[3] = resources
->irqs
->interrupt
[3];
2485 irqs
.valid_INT
= resources
->irqs
->valid_INT
;
2488 /* set up resource lists that are now aligned on top and bottom
2489 * for anything behind the bridge. */
2490 temp_resources
.bus_head
= bus_node
;
2491 temp_resources
.io_head
= io_node
;
2492 temp_resources
.mem_head
= mem_node
;
2493 temp_resources
.p_mem_head
= p_mem_node
;
2494 temp_resources
.irqs
= &irqs
;
2496 /* Make copies of the nodes we are going to pass down so that
2497 * if there is a problem,we can just use these to free resources
2499 hold_bus_node
= kmalloc(sizeof(*hold_bus_node
), GFP_KERNEL
);
2500 hold_IO_node
= kmalloc(sizeof(*hold_IO_node
), GFP_KERNEL
);
2501 hold_mem_node
= kmalloc(sizeof(*hold_mem_node
), GFP_KERNEL
);
2502 hold_p_mem_node
= kmalloc(sizeof(*hold_p_mem_node
), GFP_KERNEL
);
2504 if (!hold_bus_node
|| !hold_IO_node
|| !hold_mem_node
|| !hold_p_mem_node
) {
2505 kfree(hold_bus_node
);
2506 kfree(hold_IO_node
);
2507 kfree(hold_mem_node
);
2508 kfree(hold_p_mem_node
);
2513 memcpy(hold_bus_node
, bus_node
, sizeof(struct pci_resource
));
2515 bus_node
->base
+= 1;
2516 bus_node
->length
-= 1;
2517 bus_node
->next
= NULL
;
2519 /* If we have IO resources copy them and fill in the bridge's
2520 * IO range registers */
2522 memcpy(hold_IO_node
, io_node
, sizeof(struct pci_resource
));
2523 io_node
->next
= NULL
;
2525 /* set IO base and Limit registers */
2526 temp_byte
= io_node
->base
>> 8;
2527 rc
= pci_bus_write_config_byte(pci_bus
, devfn
, PCI_IO_BASE
, temp_byte
);
2529 temp_byte
= (io_node
->base
+ io_node
->length
- 1) >> 8;
2530 rc
= pci_bus_write_config_byte(pci_bus
, devfn
, PCI_IO_LIMIT
, temp_byte
);
2532 kfree(hold_IO_node
);
2533 hold_IO_node
= NULL
;
2536 /* If we have memory resources copy them and fill in the
2537 * bridge's memory range registers. Otherwise, fill in the
2538 * range registers with values that disable them. */
2540 memcpy(hold_mem_node
, mem_node
, sizeof(struct pci_resource
));
2541 mem_node
->next
= NULL
;
2543 /* set Mem base and Limit registers */
2544 temp_word
= mem_node
->base
>> 16;
2545 rc
= pci_bus_write_config_word(pci_bus
, devfn
, PCI_MEMORY_BASE
, temp_word
);
2547 temp_word
= (mem_node
->base
+ mem_node
->length
- 1) >> 16;
2548 rc
= pci_bus_write_config_word(pci_bus
, devfn
, PCI_MEMORY_LIMIT
, temp_word
);
2551 rc
= pci_bus_write_config_word(pci_bus
, devfn
, PCI_MEMORY_BASE
, temp_word
);
2554 rc
= pci_bus_write_config_word(pci_bus
, devfn
, PCI_MEMORY_LIMIT
, temp_word
);
2556 kfree(hold_mem_node
);
2557 hold_mem_node
= NULL
;
2560 memcpy(hold_p_mem_node
, p_mem_node
, sizeof(struct pci_resource
));
2561 p_mem_node
->next
= NULL
;
2563 /* set Pre Mem base and Limit registers */
2564 temp_word
= p_mem_node
->base
>> 16;
2565 rc
= pci_bus_write_config_word (pci_bus
, devfn
, PCI_PREF_MEMORY_BASE
, temp_word
);
2567 temp_word
= (p_mem_node
->base
+ p_mem_node
->length
- 1) >> 16;
2568 rc
= pci_bus_write_config_word (pci_bus
, devfn
, PCI_PREF_MEMORY_LIMIT
, temp_word
);
2570 /* Adjust this to compensate for extra adjustment in first loop
2576 /* Here we actually find the devices and configure them */
2577 for (device
= 0; (device
<= 0x1F) && !rc
; device
++) {
2578 irqs
.barber_pole
= (irqs
.barber_pole
+ 1) & 0x03;
2581 pci_bus
->number
= hold_bus_node
->base
;
2582 pci_bus_read_config_dword (pci_bus
, PCI_DEVFN(device
, 0), 0x00, &ID
);
2583 pci_bus
->number
= func
->bus
;
2585 if (ID
!= 0xFFFFFFFF) { /* device present */
2586 /* Setup slot structure. */
2587 new_slot
= cpqhp_slot_create(hold_bus_node
->base
);
2589 if (new_slot
== NULL
) {
2594 new_slot
->bus
= hold_bus_node
->base
;
2595 new_slot
->device
= device
;
2596 new_slot
->function
= 0;
2597 new_slot
->is_a_board
= 1;
2598 new_slot
->status
= 0;
2600 rc
= configure_new_device(ctrl
, new_slot
, 1, &temp_resources
);
2601 dbg("configure_new_device rc=0x%x\n",rc
);
2602 } /* End of IF (device in slot?) */
2603 } /* End of FOR loop */
2607 /* save the interrupt routing information */
2608 if (resources
->irqs
) {
2609 resources
->irqs
->interrupt
[0] = irqs
.interrupt
[0];
2610 resources
->irqs
->interrupt
[1] = irqs
.interrupt
[1];
2611 resources
->irqs
->interrupt
[2] = irqs
.interrupt
[2];
2612 resources
->irqs
->interrupt
[3] = irqs
.interrupt
[3];
2613 resources
->irqs
->valid_INT
= irqs
.valid_INT
;
2614 } else if (!behind_bridge
) {
2615 /* We need to hook up the interrupts here */
2616 for (cloop
= 0; cloop
< 4; cloop
++) {
2617 if (irqs
.valid_INT
& (0x01 << cloop
)) {
2618 rc
= cpqhp_set_irq(func
->bus
, func
->device
,
2619 cloop
+ 1, irqs
.interrupt
[cloop
]);
2623 } /* end of for loop */
2625 /* Return unused bus resources
2626 * First use the temporary node to store information for
2628 if (hold_bus_node
&& bus_node
&& temp_resources
.bus_head
) {
2629 hold_bus_node
->length
= bus_node
->base
- hold_bus_node
->base
;
2631 hold_bus_node
->next
= func
->bus_head
;
2632 func
->bus_head
= hold_bus_node
;
2634 temp_byte
= temp_resources
.bus_head
->base
- 1;
2636 /* set subordinate bus */
2637 rc
= pci_bus_write_config_byte (pci_bus
, devfn
, PCI_SUBORDINATE_BUS
, temp_byte
);
2639 if (temp_resources
.bus_head
->length
== 0) {
2640 kfree(temp_resources
.bus_head
);
2641 temp_resources
.bus_head
= NULL
;
2643 return_resource(&(resources
->bus_head
), temp_resources
.bus_head
);
2647 /* If we have IO space available and there is some left,
2648 * return the unused portion */
2649 if (hold_IO_node
&& temp_resources
.io_head
) {
2650 io_node
= do_pre_bridge_resource_split(&(temp_resources
.io_head
),
2651 &hold_IO_node
, 0x1000);
2653 /* Check if we were able to split something off */
2655 hold_IO_node
->base
= io_node
->base
+ io_node
->length
;
2657 temp_byte
= (hold_IO_node
->base
) >> 8;
2658 rc
= pci_bus_write_config_word (pci_bus
, devfn
, PCI_IO_BASE
, temp_byte
);
2660 return_resource(&(resources
->io_head
), io_node
);
2663 io_node
= do_bridge_resource_split(&(temp_resources
.io_head
), 0x1000);
2665 /* Check if we were able to split something off */
2667 /* First use the temporary node to store
2668 * information for the board */
2669 hold_IO_node
->length
= io_node
->base
- hold_IO_node
->base
;
2671 /* If we used any, add it to the board's list */
2672 if (hold_IO_node
->length
) {
2673 hold_IO_node
->next
= func
->io_head
;
2674 func
->io_head
= hold_IO_node
;
2676 temp_byte
= (io_node
->base
- 1) >> 8;
2677 rc
= pci_bus_write_config_byte (pci_bus
, devfn
, PCI_IO_LIMIT
, temp_byte
);
2679 return_resource(&(resources
->io_head
), io_node
);
2681 /* it doesn't need any IO */
2683 rc
= pci_bus_write_config_word (pci_bus
, devfn
, PCI_IO_LIMIT
, temp_word
);
2685 return_resource(&(resources
->io_head
), io_node
);
2686 kfree(hold_IO_node
);
2689 /* it used most of the range */
2690 hold_IO_node
->next
= func
->io_head
;
2691 func
->io_head
= hold_IO_node
;
2693 } else if (hold_IO_node
) {
2694 /* it used the whole range */
2695 hold_IO_node
->next
= func
->io_head
;
2696 func
->io_head
= hold_IO_node
;
2698 /* If we have memory space available and there is some left,
2699 * return the unused portion */
2700 if (hold_mem_node
&& temp_resources
.mem_head
) {
2701 mem_node
= do_pre_bridge_resource_split(&(temp_resources
. mem_head
),
2702 &hold_mem_node
, 0x100000);
2704 /* Check if we were able to split something off */
2706 hold_mem_node
->base
= mem_node
->base
+ mem_node
->length
;
2708 temp_word
= (hold_mem_node
->base
) >> 16;
2709 rc
= pci_bus_write_config_word (pci_bus
, devfn
, PCI_MEMORY_BASE
, temp_word
);
2711 return_resource(&(resources
->mem_head
), mem_node
);
2714 mem_node
= do_bridge_resource_split(&(temp_resources
.mem_head
), 0x100000);
2716 /* Check if we were able to split something off */
2718 /* First use the temporary node to store
2719 * information for the board */
2720 hold_mem_node
->length
= mem_node
->base
- hold_mem_node
->base
;
2722 if (hold_mem_node
->length
) {
2723 hold_mem_node
->next
= func
->mem_head
;
2724 func
->mem_head
= hold_mem_node
;
2726 /* configure end address */
2727 temp_word
= (mem_node
->base
- 1) >> 16;
2728 rc
= pci_bus_write_config_word (pci_bus
, devfn
, PCI_MEMORY_LIMIT
, temp_word
);
2730 /* Return unused resources to the pool */
2731 return_resource(&(resources
->mem_head
), mem_node
);
2733 /* it doesn't need any Mem */
2735 rc
= pci_bus_write_config_word (pci_bus
, devfn
, PCI_MEMORY_LIMIT
, temp_word
);
2737 return_resource(&(resources
->mem_head
), mem_node
);
2738 kfree(hold_mem_node
);
2741 /* it used most of the range */
2742 hold_mem_node
->next
= func
->mem_head
;
2743 func
->mem_head
= hold_mem_node
;
2745 } else if (hold_mem_node
) {
2746 /* it used the whole range */
2747 hold_mem_node
->next
= func
->mem_head
;
2748 func
->mem_head
= hold_mem_node
;
2750 /* If we have prefetchable memory space available and there
2751 * is some left at the end, return the unused portion */
2752 if (hold_p_mem_node
&& temp_resources
.p_mem_head
) {
2753 p_mem_node
= do_pre_bridge_resource_split(&(temp_resources
.p_mem_head
),
2754 &hold_p_mem_node
, 0x100000);
2756 /* Check if we were able to split something off */
2758 hold_p_mem_node
->base
= p_mem_node
->base
+ p_mem_node
->length
;
2760 temp_word
= (hold_p_mem_node
->base
) >> 16;
2761 rc
= pci_bus_write_config_word (pci_bus
, devfn
, PCI_PREF_MEMORY_BASE
, temp_word
);
2763 return_resource(&(resources
->p_mem_head
), p_mem_node
);
2766 p_mem_node
= do_bridge_resource_split(&(temp_resources
.p_mem_head
), 0x100000);
2768 /* Check if we were able to split something off */
2770 /* First use the temporary node to store
2771 * information for the board */
2772 hold_p_mem_node
->length
= p_mem_node
->base
- hold_p_mem_node
->base
;
2774 /* If we used any, add it to the board's list */
2775 if (hold_p_mem_node
->length
) {
2776 hold_p_mem_node
->next
= func
->p_mem_head
;
2777 func
->p_mem_head
= hold_p_mem_node
;
2779 temp_word
= (p_mem_node
->base
- 1) >> 16;
2780 rc
= pci_bus_write_config_word (pci_bus
, devfn
, PCI_PREF_MEMORY_LIMIT
, temp_word
);
2782 return_resource(&(resources
->p_mem_head
), p_mem_node
);
2784 /* it doesn't need any PMem */
2786 rc
= pci_bus_write_config_word (pci_bus
, devfn
, PCI_PREF_MEMORY_LIMIT
, temp_word
);
2788 return_resource(&(resources
->p_mem_head
), p_mem_node
);
2789 kfree(hold_p_mem_node
);
2792 /* it used the most of the range */
2793 hold_p_mem_node
->next
= func
->p_mem_head
;
2794 func
->p_mem_head
= hold_p_mem_node
;
2796 } else if (hold_p_mem_node
) {
2797 /* it used the whole range */
2798 hold_p_mem_node
->next
= func
->p_mem_head
;
2799 func
->p_mem_head
= hold_p_mem_node
;
2801 /* We should be configuring an IRQ and the bridge's base address
2802 * registers if it needs them. Although we have never seen such
2806 command
= 0x0157; /* = PCI_COMMAND_IO |
2807 * PCI_COMMAND_MEMORY |
2808 * PCI_COMMAND_MASTER |
2809 * PCI_COMMAND_INVALIDATE |
2810 * PCI_COMMAND_PARITY |
2811 * PCI_COMMAND_SERR */
2812 rc
= pci_bus_write_config_word (pci_bus
, devfn
, PCI_COMMAND
, command
);
2814 /* set Bridge Control Register */
2815 command
= 0x07; /* = PCI_BRIDGE_CTL_PARITY |
2816 * PCI_BRIDGE_CTL_SERR |
2817 * PCI_BRIDGE_CTL_NO_ISA */
2818 rc
= pci_bus_write_config_word (pci_bus
, devfn
, PCI_BRIDGE_CONTROL
, command
);
2819 } else if ((temp_byte
& 0x7F) == PCI_HEADER_TYPE_NORMAL
) {
2820 /* Standard device */
2821 rc
= pci_bus_read_config_byte (pci_bus
, devfn
, 0x0B, &class_code
);
2823 if (class_code
== PCI_BASE_CLASS_DISPLAY
) {
2824 /* Display (video) adapter (not supported) */
2825 return DEVICE_TYPE_NOT_SUPPORTED
;
2827 /* Figure out IO and memory needs */
2828 for (cloop
= 0x10; cloop
<= 0x24; cloop
+= 4) {
2829 temp_register
= 0xFFFFFFFF;
2831 dbg("CND: bus=%d, devfn=%d, offset=%d\n", pci_bus
->number
, devfn
, cloop
);
2832 rc
= pci_bus_write_config_dword (pci_bus
, devfn
, cloop
, temp_register
);
2834 rc
= pci_bus_read_config_dword (pci_bus
, devfn
, cloop
, &temp_register
);
2835 dbg("CND: base = 0x%x\n", temp_register
);
2837 if (temp_register
) { /* If this register is implemented */
2838 if ((temp_register
& 0x03L
) == 0x01) {
2841 /* set base = amount of IO space */
2842 base
= temp_register
& 0xFFFFFFFC;
2845 dbg("CND: length = 0x%x\n", base
);
2846 io_node
= get_io_resource(&(resources
->io_head
), base
);
2847 dbg("Got io_node start = %8.8x, length = %8.8x next (%p)\n",
2848 io_node
->base
, io_node
->length
, io_node
->next
);
2849 dbg("func (%p) io_head (%p)\n", func
, func
->io_head
);
2851 /* allocate the resource to the board */
2853 base
= io_node
->base
;
2855 io_node
->next
= func
->io_head
;
2856 func
->io_head
= io_node
;
2859 } else if ((temp_register
& 0x0BL
) == 0x08) {
2860 /* Map prefetchable memory */
2861 base
= temp_register
& 0xFFFFFFF0;
2864 dbg("CND: length = 0x%x\n", base
);
2865 p_mem_node
= get_resource(&(resources
->p_mem_head
), base
);
2867 /* allocate the resource to the board */
2869 base
= p_mem_node
->base
;
2871 p_mem_node
->next
= func
->p_mem_head
;
2872 func
->p_mem_head
= p_mem_node
;
2875 } else if ((temp_register
& 0x0BL
) == 0x00) {
2877 base
= temp_register
& 0xFFFFFFF0;
2880 dbg("CND: length = 0x%x\n", base
);
2881 mem_node
= get_resource(&(resources
->mem_head
), base
);
2883 /* allocate the resource to the board */
2885 base
= mem_node
->base
;
2887 mem_node
->next
= func
->mem_head
;
2888 func
->mem_head
= mem_node
;
2891 } else if ((temp_register
& 0x0BL
) == 0x04) {
2893 base
= temp_register
& 0xFFFFFFF0;
2896 dbg("CND: length = 0x%x\n", base
);
2897 mem_node
= get_resource(&(resources
->mem_head
), base
);
2899 /* allocate the resource to the board */
2901 base
= mem_node
->base
;
2903 mem_node
->next
= func
->mem_head
;
2904 func
->mem_head
= mem_node
;
2907 } else if ((temp_register
& 0x0BL
) == 0x06) {
2908 /* Those bits are reserved, we can't handle this */
2911 /* Requesting space below 1M */
2912 return NOT_ENOUGH_RESOURCES
;
2915 rc
= pci_bus_write_config_dword(pci_bus
, devfn
, cloop
, base
);
2917 /* Check for 64-bit base */
2918 if ((temp_register
& 0x07L
) == 0x04) {
2921 /* Upper 32 bits of address always zero
2922 * on today's systems */
2923 /* FIXME this is probably not true on
2924 * Alpha and ia64??? */
2926 rc
= pci_bus_write_config_dword(pci_bus
, devfn
, cloop
, base
);
2929 } /* End of base register loop */
2930 if (cpqhp_legacy_mode
) {
2931 /* Figure out which interrupt pin this function uses */
2932 rc
= pci_bus_read_config_byte (pci_bus
, devfn
,
2933 PCI_INTERRUPT_PIN
, &temp_byte
);
2935 /* If this function needs an interrupt and we are behind
2936 * a bridge and the pin is tied to something that's
2937 * alread mapped, set this one the same */
2938 if (temp_byte
&& resources
->irqs
&&
2939 (resources
->irqs
->valid_INT
&
2940 (0x01 << ((temp_byte
+ resources
->irqs
->barber_pole
- 1) & 0x03)))) {
2941 /* We have to share with something already set up */
2942 IRQ
= resources
->irqs
->interrupt
[(temp_byte
+
2943 resources
->irqs
->barber_pole
- 1) & 0x03];
2945 /* Program IRQ based on card type */
2946 rc
= pci_bus_read_config_byte (pci_bus
, devfn
, 0x0B, &class_code
);
2948 if (class_code
== PCI_BASE_CLASS_STORAGE
)
2949 IRQ
= cpqhp_disk_irq
;
2951 IRQ
= cpqhp_nic_irq
;
2955 rc
= pci_bus_write_config_byte (pci_bus
, devfn
, PCI_INTERRUPT_LINE
, IRQ
);
2958 if (!behind_bridge
) {
2959 rc
= cpqhp_set_irq(func
->bus
, func
->device
, temp_byte
, IRQ
);
2963 /* TBD - this code may also belong in the other clause
2964 * of this If statement */
2965 resources
->irqs
->interrupt
[(temp_byte
+ resources
->irqs
->barber_pole
- 1) & 0x03] = IRQ
;
2966 resources
->irqs
->valid_INT
|= 0x01 << (temp_byte
+ resources
->irqs
->barber_pole
- 1) & 0x03;
2971 rc
= pci_bus_write_config_byte(pci_bus
, devfn
,
2972 PCI_LATENCY_TIMER
, temp_byte
);
2974 /* Cache Line size */
2976 rc
= pci_bus_write_config_byte(pci_bus
, devfn
,
2977 PCI_CACHE_LINE_SIZE
, temp_byte
);
2979 /* disable ROM base Address */
2981 rc
= pci_bus_write_config_word(pci_bus
, devfn
,
2982 PCI_ROM_ADDRESS
, temp_dword
);
2985 temp_word
= 0x0157; /* = PCI_COMMAND_IO |
2986 * PCI_COMMAND_MEMORY |
2987 * PCI_COMMAND_MASTER |
2988 * PCI_COMMAND_INVALIDATE |
2989 * PCI_COMMAND_PARITY |
2990 * PCI_COMMAND_SERR */
2991 rc
= pci_bus_write_config_word (pci_bus
, devfn
,
2992 PCI_COMMAND
, temp_word
);
2993 } else { /* End of Not-A-Bridge else */
2994 /* It's some strange type of PCI adapter (Cardbus?) */
2995 return DEVICE_TYPE_NOT_SUPPORTED
;
2998 func
->configured
= 1;
3002 cpqhp_destroy_resource_list (&temp_resources
);
3004 return_resource(&(resources
-> bus_head
), hold_bus_node
);
3005 return_resource(&(resources
-> io_head
), hold_IO_node
);
3006 return_resource(&(resources
-> mem_head
), hold_mem_node
);
3007 return_resource(&(resources
-> p_mem_head
), hold_p_mem_node
);