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/pci.h>
38 #include <linux/pci_hotplug.h>
39 #include <linux/kthread.h>
42 static u32 configure_new_device(struct controller *ctrl, struct pci_func *func,
43 u8 behind_bridge, struct resource_lists *resources);
44 static int configure_new_function(struct controller *ctrl, struct pci_func *func,
45 u8 behind_bridge, struct resource_lists *resources);
46 static void interrupt_event_handler(struct controller *ctrl);
49 static struct task_struct *cpqhp_event_thread;
50 static unsigned long pushbutton_pending; /* = 0 */
52 /* delay is in jiffies to wait for */
53 static void long_delay(int delay)
56 * XXX(hch): if someone is bored please convert all callers
57 * to call msleep_interruptible directly. They really want
58 * to specify timeouts in natural units and spend a lot of
59 * effort converting them to jiffies..
61 msleep_interruptible(jiffies_to_msecs(delay));
65 /* FIXME: The following line needs to be somewhere else... */
66 #define WRONG_BUS_FREQUENCY 0x07
67 static u8 handle_switch_change(u8 change, struct controller *ctrl)
72 struct pci_func *func;
73 struct event_info *taskInfo;
79 dbg("cpqsbd: Switch interrupt received.\n");
81 for (hp_slot = 0; hp_slot < 6; hp_slot++) {
82 if (change & (0x1L << hp_slot)) {
86 func = cpqhp_slot_find(ctrl->bus,
87 (hp_slot + ctrl->slot_device_offset), 0);
89 /* this is the structure that tells the worker thread
92 taskInfo = &(ctrl->event_queue[ctrl->next_event]);
93 ctrl->next_event = (ctrl->next_event + 1) % 10;
94 taskInfo->hp_slot = hp_slot;
98 temp_word = ctrl->ctrl_int_comp >> 16;
99 func->presence_save = (temp_word >> hp_slot) & 0x01;
100 func->presence_save |= (temp_word >> (hp_slot + 7)) & 0x02;
102 if (ctrl->ctrl_int_comp & (0x1L << hp_slot)) {
107 func->switch_save = 0;
109 taskInfo->event_type = INT_SWITCH_OPEN;
115 func->switch_save = 0x10;
117 taskInfo->event_type = INT_SWITCH_CLOSE;
126 * cpqhp_find_slot - find the struct slot of given device
127 * @ctrl: scan lots of this controller
128 * @device: the device id to find
130 static struct slot *cpqhp_find_slot(struct controller *ctrl, u8 device)
132 struct slot *slot = ctrl->slot;
134 while (slot && (slot->device != device))
141 static u8 handle_presence_change(u16 change, struct controller *ctrl)
147 struct pci_func *func;
148 struct event_info *taskInfo;
157 dbg("cpqsbd: Presence/Notify input change.\n");
158 dbg(" Changed bits are 0x%4.4x\n", change );
160 for (hp_slot = 0; hp_slot < 6; hp_slot++) {
161 if (change & (0x0101 << hp_slot)) {
165 func = cpqhp_slot_find(ctrl->bus,
166 (hp_slot + ctrl->slot_device_offset), 0);
168 taskInfo = &(ctrl->event_queue[ctrl->next_event]);
169 ctrl->next_event = (ctrl->next_event + 1) % 10;
170 taskInfo->hp_slot = hp_slot;
174 p_slot = cpqhp_find_slot(ctrl, hp_slot + (readb(ctrl->hpc_reg + SLOT_MASK) >> 4));
178 /* If the switch closed, must be a button
179 * If not in button mode, nevermind
181 if (func->switch_save && (ctrl->push_button == 1)) {
182 temp_word = ctrl->ctrl_int_comp >> 16;
183 temp_byte = (temp_word >> hp_slot) & 0x01;
184 temp_byte |= (temp_word >> (hp_slot + 7)) & 0x02;
186 if (temp_byte != func->presence_save) {
188 * button Pressed (doesn't do anything)
190 dbg("hp_slot %d button pressed\n", hp_slot);
191 taskInfo->event_type = INT_BUTTON_PRESS;
194 * button Released - TAKE ACTION!!!!
196 dbg("hp_slot %d button released\n", hp_slot);
197 taskInfo->event_type = INT_BUTTON_RELEASE;
199 /* Cancel if we are still blinking */
200 if ((p_slot->state == BLINKINGON_STATE)
201 || (p_slot->state == BLINKINGOFF_STATE)) {
202 taskInfo->event_type = INT_BUTTON_CANCEL;
203 dbg("hp_slot %d button cancel\n", hp_slot);
204 } else if ((p_slot->state == POWERON_STATE)
205 || (p_slot->state == POWEROFF_STATE)) {
206 /* info(msg_button_ignore, p_slot->number); */
207 taskInfo->event_type = INT_BUTTON_IGNORE;
208 dbg("hp_slot %d button ignore\n", hp_slot);
212 /* Switch is open, assume a presence change
213 * Save the presence state
215 temp_word = ctrl->ctrl_int_comp >> 16;
216 func->presence_save = (temp_word >> hp_slot) & 0x01;
217 func->presence_save |= (temp_word >> (hp_slot + 7)) & 0x02;
219 if ((!(ctrl->ctrl_int_comp & (0x010000 << hp_slot))) ||
220 (!(ctrl->ctrl_int_comp & (0x01000000 << hp_slot)))) {
222 taskInfo->event_type = INT_PRESENCE_ON;
225 taskInfo->event_type = INT_PRESENCE_OFF;
235 static u8 handle_power_fault(u8 change, struct controller *ctrl)
239 struct pci_func *func;
240 struct event_info *taskInfo;
249 info("power fault interrupt\n");
251 for (hp_slot = 0; hp_slot < 6; hp_slot++) {
252 if (change & (0x01 << hp_slot)) {
256 func = cpqhp_slot_find(ctrl->bus,
257 (hp_slot + ctrl->slot_device_offset), 0);
259 taskInfo = &(ctrl->event_queue[ctrl->next_event]);
260 ctrl->next_event = (ctrl->next_event + 1) % 10;
261 taskInfo->hp_slot = hp_slot;
265 if (ctrl->ctrl_int_comp & (0x00000100 << hp_slot)) {
267 * power fault Cleared
271 taskInfo->event_type = INT_POWER_FAULT_CLEAR;
276 taskInfo->event_type = INT_POWER_FAULT;
279 amber_LED_on (ctrl, hp_slot);
280 green_LED_off (ctrl, hp_slot);
283 /* this is a fatal condition, we want
284 * to crash the machine to protect from
285 * data corruption. simulated_NMI
286 * shouldn't ever return */
288 simulated_NMI(hp_slot, ctrl); */
290 /* The following code causes a software
291 * crash just in case simulated_NMI did
294 panic(msg_power_fault); */
296 /* set power fault status for this board */
298 info("power fault bit %x set\n", hp_slot);
309 * sort_by_size - sort nodes on the list by their length, smallest first.
310 * @head: list to sort
312 static int sort_by_size(struct pci_resource **head)
314 struct pci_resource *current_res;
315 struct pci_resource *next_res;
316 int out_of_order = 1;
321 if (!((*head)->next))
324 while (out_of_order) {
327 /* Special case for swapping list head */
328 if (((*head)->next) &&
329 ((*head)->length > (*head)->next->length)) {
332 *head = (*head)->next;
333 current_res->next = (*head)->next;
334 (*head)->next = current_res;
339 while (current_res->next && current_res->next->next) {
340 if (current_res->next->length > current_res->next->next->length) {
342 next_res = current_res->next;
343 current_res->next = current_res->next->next;
344 current_res = current_res->next;
345 next_res->next = current_res->next;
346 current_res->next = next_res;
348 current_res = current_res->next;
350 } /* End of out_of_order loop */
357 * sort_by_max_size - sort nodes on the list by their length, largest first.
358 * @head: list to sort
360 static int sort_by_max_size(struct pci_resource **head)
362 struct pci_resource *current_res;
363 struct pci_resource *next_res;
364 int out_of_order = 1;
369 if (!((*head)->next))
372 while (out_of_order) {
375 /* Special case for swapping list head */
376 if (((*head)->next) &&
377 ((*head)->length < (*head)->next->length)) {
380 *head = (*head)->next;
381 current_res->next = (*head)->next;
382 (*head)->next = current_res;
387 while (current_res->next && current_res->next->next) {
388 if (current_res->next->length < current_res->next->next->length) {
390 next_res = current_res->next;
391 current_res->next = current_res->next->next;
392 current_res = current_res->next;
393 next_res->next = current_res->next;
394 current_res->next = next_res;
396 current_res = current_res->next;
398 } /* End of out_of_order loop */
405 * do_pre_bridge_resource_split - find node of resources that are unused
406 * @head: new list head
407 * @orig_head: original list head
408 * @alignment: max node size (?)
410 static struct pci_resource *do_pre_bridge_resource_split(struct pci_resource **head,
411 struct pci_resource **orig_head, u32 alignment)
413 struct pci_resource *prevnode = NULL;
414 struct pci_resource *node;
415 struct pci_resource *split_node;
418 dbg("do_pre_bridge_resource_split\n");
420 if (!(*head) || !(*orig_head))
423 rc = cpqhp_resource_sort_and_combine(head);
428 if ((*head)->base != (*orig_head)->base)
431 if ((*head)->length == (*orig_head)->length)
435 /* If we got here, there the bridge requires some of the resource, but
436 * we may be able to split some off of the front
441 if (node->length & (alignment -1)) {
442 /* this one isn't an aligned length, so we'll make a new entry
445 split_node = kmalloc(sizeof(*split_node), GFP_KERNEL);
450 temp_dword = (node->length | (alignment-1)) + 1 - alignment;
452 split_node->base = node->base;
453 split_node->length = temp_dword;
455 node->length -= temp_dword;
456 node->base += split_node->length;
458 /* Put it in the list */
460 split_node->next = node;
463 if (node->length < alignment)
471 while (prevnode->next != node)
472 prevnode = prevnode->next;
474 prevnode->next = node->next;
483 * do_bridge_resource_split - find one node of resources that aren't in use
485 * @alignment: max node size (?)
487 static struct pci_resource *do_bridge_resource_split(struct pci_resource **head, u32 alignment)
489 struct pci_resource *prevnode = NULL;
490 struct pci_resource *node;
494 rc = cpqhp_resource_sort_and_combine(head);
507 if (node->length < alignment)
510 if (node->base & (alignment - 1)) {
511 /* Short circuit if adjusted size is too small */
512 temp_dword = (node->base | (alignment-1)) + 1;
513 if ((node->length - (temp_dword - node->base)) < alignment)
516 node->length -= (temp_dword - node->base);
517 node->base = temp_dword;
520 if (node->length & (alignment - 1))
521 /* There's stuff in use after this node */
532 * get_io_resource - find first node of given size not in ISA aliasing window.
533 * @head: list to search
534 * @size: size of node to find, must be a power of two.
536 * Description: This function sorts the resource list by size and then returns
537 * returns the first node of "size" length that is not in the ISA aliasing
538 * window. If it finds a node larger than "size" it will split it up.
540 static struct pci_resource *get_io_resource(struct pci_resource **head, u32 size)
542 struct pci_resource *prevnode;
543 struct pci_resource *node;
544 struct pci_resource *split_node;
550 if (cpqhp_resource_sort_and_combine(head))
553 if (sort_by_size(head))
556 for (node = *head; node; node = node->next) {
557 if (node->length < size)
560 if (node->base & (size - 1)) {
561 /* this one isn't base aligned properly
562 * so we'll make a new entry and split it up
564 temp_dword = (node->base | (size-1)) + 1;
566 /* Short circuit if adjusted size is too small */
567 if ((node->length - (temp_dword - node->base)) < size)
570 split_node = kmalloc(sizeof(*split_node), GFP_KERNEL);
575 split_node->base = node->base;
576 split_node->length = temp_dword - node->base;
577 node->base = temp_dword;
578 node->length -= split_node->length;
580 /* Put it in the list */
581 split_node->next = node->next;
582 node->next = split_node;
583 } /* End of non-aligned base */
585 /* Don't need to check if too small since we already did */
586 if (node->length > size) {
587 /* this one is longer than we need
588 * so we'll make a new entry and split it up
590 split_node = kmalloc(sizeof(*split_node), GFP_KERNEL);
595 split_node->base = node->base + size;
596 split_node->length = node->length - size;
599 /* Put it in the list */
600 split_node->next = node->next;
601 node->next = split_node;
602 } /* End of too big on top end */
604 /* For IO make sure it's not in the ISA aliasing space */
605 if (node->base & 0x300L)
608 /* If we got here, then it is the right size
609 * Now take it out of the list and break
615 while (prevnode->next != node)
616 prevnode = prevnode->next;
618 prevnode->next = node->next;
629 * get_max_resource - get largest node which has at least the given size.
630 * @head: the list to search the node in
631 * @size: the minimum size of the node to find
633 * Description: Gets the largest node that is at least "size" big from the
634 * list pointed to by head. It aligns the node on top and bottom
635 * to "size" alignment before returning it.
637 static struct pci_resource *get_max_resource(struct pci_resource **head, u32 size)
639 struct pci_resource *max;
640 struct pci_resource *temp;
641 struct pci_resource *split_node;
644 if (cpqhp_resource_sort_and_combine(head))
647 if (sort_by_max_size(head))
650 for (max = *head; max; max = max->next) {
651 /* If not big enough we could probably just bail,
652 * instead we'll continue to the next.
654 if (max->length < size)
657 if (max->base & (size - 1)) {
658 /* this one isn't base aligned properly
659 * so we'll make a new entry and split it up
661 temp_dword = (max->base | (size-1)) + 1;
663 /* Short circuit if adjusted size is too small */
664 if ((max->length - (temp_dword - max->base)) < size)
667 split_node = kmalloc(sizeof(*split_node), GFP_KERNEL);
672 split_node->base = max->base;
673 split_node->length = temp_dword - max->base;
674 max->base = temp_dword;
675 max->length -= split_node->length;
677 split_node->next = max->next;
678 max->next = split_node;
681 if ((max->base + max->length) & (size - 1)) {
682 /* this one isn't end aligned properly at the top
683 * so we'll make a new entry and split it up
685 split_node = kmalloc(sizeof(*split_node), GFP_KERNEL);
689 temp_dword = ((max->base + max->length) & ~(size - 1));
690 split_node->base = temp_dword;
691 split_node->length = max->length + max->base
693 max->length -= split_node->length;
695 split_node->next = max->next;
696 max->next = split_node;
699 /* Make sure it didn't shrink too much when we aligned it */
700 if (max->length < size)
703 /* Now take it out of the list */
708 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)
1134 struct pci_bus *bus = ctrl->pci_bus;
1136 u8 slot_power = readb(ctrl->hpc_reg + SLOT_POWER);
1138 u32 leds = readl(ctrl->hpc_reg + LED_CONTROL);
1140 if (bus->cur_bus_speed == adapter_speed)
1143 /* We don't allow freq/mode changes if we find another adapter running
1144 * in another slot on this controller
1146 for(slot = ctrl->slot; slot; slot = slot->next) {
1147 if (slot->device == (hp_slot + ctrl->slot_device_offset))
1149 if (!slot->hotplug_slot || !slot->hotplug_slot->info)
1151 if (slot->hotplug_slot->info->adapter_status == 0)
1153 /* If another adapter is running on the same segment but at a
1154 * lower speed/mode, we allow the new adapter to function at
1155 * this rate if supported
1157 if (bus->cur_bus_speed < adapter_speed)
1163 /* If the controller doesn't support freq/mode changes and the
1164 * controller is running at a higher mode, we bail
1166 if ((bus->cur_bus_speed > adapter_speed) && (!ctrl->pcix_speed_capability))
1169 /* But we allow the adapter to run at a lower rate if possible */
1170 if ((bus->cur_bus_speed < adapter_speed) && (!ctrl->pcix_speed_capability))
1173 /* We try to set the max speed supported by both the adapter and
1176 if (bus->max_bus_speed < adapter_speed) {
1177 if (bus->cur_bus_speed == bus->max_bus_speed)
1179 adapter_speed = bus->max_bus_speed;
1182 writel(0x0L, ctrl->hpc_reg + LED_CONTROL);
1183 writeb(0x00, ctrl->hpc_reg + SLOT_ENABLE);
1186 wait_for_ctrl_irq(ctrl);
1188 if (adapter_speed != PCI_SPEED_133MHz_PCIX)
1192 pci_write_config_byte(ctrl->pci_dev, 0x41, reg);
1194 reg16 = readw(ctrl->hpc_reg + NEXT_CURR_FREQ);
1196 switch(adapter_speed) {
1197 case(PCI_SPEED_133MHz_PCIX):
1201 case(PCI_SPEED_100MHz_PCIX):
1205 case(PCI_SPEED_66MHz_PCIX):
1209 case(PCI_SPEED_66MHz):
1213 default: /* 33MHz PCI 2.2 */
1219 writew(reg16, ctrl->hpc_reg + NEXT_CURR_FREQ);
1223 /* Reenable interrupts */
1224 writel(0, ctrl->hpc_reg + INT_MASK);
1226 pci_write_config_byte(ctrl->pci_dev, 0x41, reg);
1228 /* Restart state machine */
1230 pci_read_config_byte(ctrl->pci_dev, 0x43, ®);
1231 pci_write_config_byte(ctrl->pci_dev, 0x43, reg);
1233 /* Only if mode change...*/
1234 if (((bus->cur_bus_speed == PCI_SPEED_66MHz) && (adapter_speed == PCI_SPEED_66MHz_PCIX)) ||
1235 ((bus->cur_bus_speed == PCI_SPEED_66MHz_PCIX) && (adapter_speed == PCI_SPEED_66MHz)))
1238 wait_for_ctrl_irq(ctrl);
1241 /* Restore LED/Slot state */
1242 writel(leds, ctrl->hpc_reg + LED_CONTROL);
1243 writeb(slot_power, ctrl->hpc_reg + SLOT_ENABLE);
1246 wait_for_ctrl_irq(ctrl);
1248 bus->cur_bus_speed = adapter_speed;
1249 slot = cpqhp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
1251 info("Successfully changed frequency/mode for adapter in slot %d\n",
1256 /* the following routines constitute the bulk of the
1257 * hotplug controller logic
1262 * board_replaced - Called after a board has been replaced in the system.
1263 * @func: PCI device/function information
1264 * @ctrl: hotplug controller
1266 * This is only used if we don't have resources for hot add.
1267 * Turns power on for the board.
1268 * Checks to see if board is the same.
1269 * If board is same, reconfigures it.
1270 * If board isn't same, turns it back off.
1272 static u32 board_replaced(struct pci_func *func, struct controller *ctrl)
1274 struct pci_bus *bus = ctrl->pci_bus;
1280 hp_slot = func->device - ctrl->slot_device_offset;
1283 * The switch is open.
1285 if (readl(ctrl->hpc_reg + INT_INPUT_CLEAR) & (0x01L << hp_slot))
1286 rc = INTERLOCK_OPEN;
1288 * The board is already on
1290 else if (is_slot_enabled (ctrl, hp_slot))
1291 rc = CARD_FUNCTIONING;
1293 mutex_lock(&ctrl->crit_sect);
1295 /* turn on board without attaching to the bus */
1296 enable_slot_power (ctrl, hp_slot);
1300 /* Wait for SOBS to be unset */
1301 wait_for_ctrl_irq (ctrl);
1303 /* Change bits in slot power register to force another shift out
1304 * NOTE: this is to work around the timer bug */
1305 temp_byte = readb(ctrl->hpc_reg + SLOT_POWER);
1306 writeb(0x00, ctrl->hpc_reg + SLOT_POWER);
1307 writeb(temp_byte, ctrl->hpc_reg + SLOT_POWER);
1311 /* Wait for SOBS to be unset */
1312 wait_for_ctrl_irq (ctrl);
1314 adapter_speed = get_adapter_speed(ctrl, hp_slot);
1315 if (bus->cur_bus_speed != adapter_speed)
1316 if (set_controller_speed(ctrl, adapter_speed, hp_slot))
1317 rc = WRONG_BUS_FREQUENCY;
1319 /* turn off board without attaching to the bus */
1320 disable_slot_power (ctrl, hp_slot);
1324 /* Wait for SOBS to be unset */
1325 wait_for_ctrl_irq (ctrl);
1327 mutex_unlock(&ctrl->crit_sect);
1332 mutex_lock(&ctrl->crit_sect);
1334 slot_enable (ctrl, hp_slot);
1335 green_LED_blink (ctrl, hp_slot);
1337 amber_LED_off (ctrl, hp_slot);
1341 /* Wait for SOBS to be unset */
1342 wait_for_ctrl_irq (ctrl);
1344 mutex_unlock(&ctrl->crit_sect);
1346 /* Wait for ~1 second because of hot plug spec */
1349 /* Check for a power fault */
1350 if (func->status == 0xFF) {
1351 /* power fault occurred, but it was benign */
1355 rc = cpqhp_valid_replace(ctrl, func);
1358 /* It must be the same board */
1360 rc = cpqhp_configure_board(ctrl, func);
1362 /* If configuration fails, turn it off
1363 * Get slot won't work for devices behind
1364 * bridges, but in this case it will always be
1365 * called for the "base" bus/dev/func of an
1369 mutex_lock(&ctrl->crit_sect);
1371 amber_LED_on (ctrl, hp_slot);
1372 green_LED_off (ctrl, hp_slot);
1373 slot_disable (ctrl, hp_slot);
1377 /* Wait for SOBS to be unset */
1378 wait_for_ctrl_irq (ctrl);
1380 mutex_unlock(&ctrl->crit_sect);
1388 /* Something is wrong
1390 * Get slot won't work for devices behind bridges, but
1391 * in this case it will always be called for the "base"
1392 * bus/dev/func of an adapter.
1395 mutex_lock(&ctrl->crit_sect);
1397 amber_LED_on (ctrl, hp_slot);
1398 green_LED_off (ctrl, hp_slot);
1399 slot_disable (ctrl, hp_slot);
1403 /* Wait for SOBS to be unset */
1404 wait_for_ctrl_irq (ctrl);
1406 mutex_unlock(&ctrl->crit_sect);
1416 * board_added - Called after a board has been added to the system.
1417 * @func: PCI device/function info
1418 * @ctrl: hotplug controller
1420 * Turns power on for the board.
1423 static u32 board_added(struct pci_func *func, struct controller *ctrl)
1429 u32 temp_register = 0xFFFFFFFF;
1431 struct pci_func *new_slot = NULL;
1432 struct pci_bus *bus = ctrl->pci_bus;
1433 struct slot *p_slot;
1434 struct resource_lists res_lists;
1436 hp_slot = func->device - ctrl->slot_device_offset;
1437 dbg("%s: func->device, slot_offset, hp_slot = %d, %d ,%d\n",
1438 __func__, func->device, ctrl->slot_device_offset, hp_slot);
1440 mutex_lock(&ctrl->crit_sect);
1442 /* turn on board without attaching to the bus */
1443 enable_slot_power(ctrl, hp_slot);
1447 /* Wait for SOBS to be unset */
1448 wait_for_ctrl_irq (ctrl);
1450 /* Change bits in slot power register to force another shift out
1451 * NOTE: this is to work around the timer bug
1453 temp_byte = readb(ctrl->hpc_reg + SLOT_POWER);
1454 writeb(0x00, ctrl->hpc_reg + SLOT_POWER);
1455 writeb(temp_byte, ctrl->hpc_reg + SLOT_POWER);
1459 /* Wait for SOBS to be unset */
1460 wait_for_ctrl_irq (ctrl);
1462 adapter_speed = get_adapter_speed(ctrl, hp_slot);
1463 if (bus->cur_bus_speed != adapter_speed)
1464 if (set_controller_speed(ctrl, adapter_speed, hp_slot))
1465 rc = WRONG_BUS_FREQUENCY;
1467 /* turn off board without attaching to the bus */
1468 disable_slot_power (ctrl, hp_slot);
1472 /* Wait for SOBS to be unset */
1473 wait_for_ctrl_irq(ctrl);
1475 mutex_unlock(&ctrl->crit_sect);
1480 p_slot = cpqhp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
1482 /* turn on board and blink green LED */
1484 dbg("%s: before down\n", __func__);
1485 mutex_lock(&ctrl->crit_sect);
1486 dbg("%s: after down\n", __func__);
1488 dbg("%s: before slot_enable\n", __func__);
1489 slot_enable (ctrl, hp_slot);
1491 dbg("%s: before green_LED_blink\n", __func__);
1492 green_LED_blink (ctrl, hp_slot);
1494 dbg("%s: before amber_LED_blink\n", __func__);
1495 amber_LED_off (ctrl, hp_slot);
1497 dbg("%s: before set_SOGO\n", __func__);
1500 /* Wait for SOBS to be unset */
1501 dbg("%s: before wait_for_ctrl_irq\n", __func__);
1502 wait_for_ctrl_irq (ctrl);
1503 dbg("%s: after wait_for_ctrl_irq\n", __func__);
1505 dbg("%s: before up\n", __func__);
1506 mutex_unlock(&ctrl->crit_sect);
1507 dbg("%s: after up\n", __func__);
1509 /* Wait for ~1 second because of hot plug spec */
1510 dbg("%s: before long_delay\n", __func__);
1512 dbg("%s: after long_delay\n", __func__);
1514 dbg("%s: func status = %x\n", __func__, func->status);
1515 /* Check for a power fault */
1516 if (func->status == 0xFF) {
1517 /* power fault occurred, but it was benign */
1518 temp_register = 0xFFFFFFFF;
1519 dbg("%s: temp register set to %x by power fault\n", __func__, temp_register);
1523 /* Get vendor/device ID u32 */
1524 ctrl->pci_bus->number = func->bus;
1525 rc = pci_bus_read_config_dword (ctrl->pci_bus, PCI_DEVFN(func->device, func->function), PCI_VENDOR_ID, &temp_register);
1526 dbg("%s: pci_read_config_dword returns %d\n", __func__, rc);
1527 dbg("%s: temp_register is %x\n", __func__, temp_register);
1530 /* Something's wrong here */
1531 temp_register = 0xFFFFFFFF;
1532 dbg("%s: temp register set to %x by error\n", __func__, temp_register);
1534 /* Preset return code. It will be changed later if things go okay. */
1535 rc = NO_ADAPTER_PRESENT;
1538 /* All F's is an empty slot or an invalid board */
1539 if (temp_register != 0xFFFFFFFF) {
1540 res_lists.io_head = ctrl->io_head;
1541 res_lists.mem_head = ctrl->mem_head;
1542 res_lists.p_mem_head = ctrl->p_mem_head;
1543 res_lists.bus_head = ctrl->bus_head;
1544 res_lists.irqs = NULL;
1546 rc = configure_new_device(ctrl, func, 0, &res_lists);
1548 dbg("%s: back from configure_new_device\n", __func__);
1549 ctrl->io_head = res_lists.io_head;
1550 ctrl->mem_head = res_lists.mem_head;
1551 ctrl->p_mem_head = res_lists.p_mem_head;
1552 ctrl->bus_head = res_lists.bus_head;
1554 cpqhp_resource_sort_and_combine(&(ctrl->mem_head));
1555 cpqhp_resource_sort_and_combine(&(ctrl->p_mem_head));
1556 cpqhp_resource_sort_and_combine(&(ctrl->io_head));
1557 cpqhp_resource_sort_and_combine(&(ctrl->bus_head));
1560 mutex_lock(&ctrl->crit_sect);
1562 amber_LED_on (ctrl, hp_slot);
1563 green_LED_off (ctrl, hp_slot);
1564 slot_disable (ctrl, hp_slot);
1568 /* Wait for SOBS to be unset */
1569 wait_for_ctrl_irq (ctrl);
1571 mutex_unlock(&ctrl->crit_sect);
1574 cpqhp_save_slot_config(ctrl, func);
1579 func->switch_save = 0x10;
1580 func->is_a_board = 0x01;
1582 /* next, we will instantiate the linux pci_dev structures (with
1583 * appropriate driver notification, if already present) */
1584 dbg("%s: configure linux pci_dev structure\n", __func__);
1587 new_slot = cpqhp_slot_find(ctrl->bus, func->device, index++);
1588 if (new_slot && !new_slot->pci_dev)
1589 cpqhp_configure_device(ctrl, new_slot);
1592 mutex_lock(&ctrl->crit_sect);
1594 green_LED_on (ctrl, hp_slot);
1598 /* Wait for SOBS to be unset */
1599 wait_for_ctrl_irq (ctrl);
1601 mutex_unlock(&ctrl->crit_sect);
1603 mutex_lock(&ctrl->crit_sect);
1605 amber_LED_on (ctrl, hp_slot);
1606 green_LED_off (ctrl, hp_slot);
1607 slot_disable (ctrl, hp_slot);
1611 /* Wait for SOBS to be unset */
1612 wait_for_ctrl_irq (ctrl);
1614 mutex_unlock(&ctrl->crit_sect);
1623 * remove_board - Turns off slot and LEDs
1624 * @func: PCI device/function info
1625 * @replace_flag: whether replacing or adding a new device
1626 * @ctrl: target controller
1628 static u32 remove_board(struct pci_func *func, u32 replace_flag, struct controller *ctrl)
1636 struct resource_lists res_lists;
1637 struct pci_func *temp_func;
1639 if (cpqhp_unconfigure_device(func))
1642 device = func->device;
1644 hp_slot = func->device - ctrl->slot_device_offset;
1645 dbg("In %s, hp_slot = %d\n", __func__, hp_slot);
1647 /* When we get here, it is safe to change base address registers.
1648 * We will attempt to save the base address register lengths */
1649 if (replace_flag || !ctrl->add_support)
1650 rc = cpqhp_save_base_addr_length(ctrl, func);
1651 else if (!func->bus_head && !func->mem_head &&
1652 !func->p_mem_head && !func->io_head) {
1653 /* Here we check to see if we've saved any of the board's
1654 * resources already. If so, we'll skip the attempt to
1655 * determine what's being used. */
1657 temp_func = cpqhp_slot_find(func->bus, func->device, index++);
1659 if (temp_func->bus_head || temp_func->mem_head
1660 || temp_func->p_mem_head || temp_func->io_head) {
1664 temp_func = cpqhp_slot_find(temp_func->bus, temp_func->device, index++);
1668 rc = cpqhp_save_used_resources(ctrl, func);
1670 /* Change status to shutdown */
1671 if (func->is_a_board)
1672 func->status = 0x01;
1673 func->configured = 0;
1675 mutex_lock(&ctrl->crit_sect);
1677 green_LED_off (ctrl, hp_slot);
1678 slot_disable (ctrl, hp_slot);
1682 /* turn off SERR for slot */
1683 temp_byte = readb(ctrl->hpc_reg + SLOT_SERR);
1684 temp_byte &= ~(0x01 << hp_slot);
1685 writeb(temp_byte, ctrl->hpc_reg + SLOT_SERR);
1687 /* Wait for SOBS to be unset */
1688 wait_for_ctrl_irq (ctrl);
1690 mutex_unlock(&ctrl->crit_sect);
1692 if (!replace_flag && ctrl->add_support) {
1694 res_lists.io_head = ctrl->io_head;
1695 res_lists.mem_head = ctrl->mem_head;
1696 res_lists.p_mem_head = ctrl->p_mem_head;
1697 res_lists.bus_head = ctrl->bus_head;
1699 cpqhp_return_board_resources(func, &res_lists);
1701 ctrl->io_head = res_lists.io_head;
1702 ctrl->mem_head = res_lists.mem_head;
1703 ctrl->p_mem_head = res_lists.p_mem_head;
1704 ctrl->bus_head = res_lists.bus_head;
1706 cpqhp_resource_sort_and_combine(&(ctrl->mem_head));
1707 cpqhp_resource_sort_and_combine(&(ctrl->p_mem_head));
1708 cpqhp_resource_sort_and_combine(&(ctrl->io_head));
1709 cpqhp_resource_sort_and_combine(&(ctrl->bus_head));
1711 if (is_bridge(func)) {
1712 bridge_slot_remove(func);
1716 func = cpqhp_slot_find(ctrl->bus, device, 0);
1719 /* Setup slot structure with entry for empty slot */
1720 func = cpqhp_slot_create(ctrl->bus);
1725 func->bus = ctrl->bus;
1726 func->device = device;
1728 func->configured = 0;
1729 func->switch_save = 0x10;
1730 func->is_a_board = 0;
1731 func->p_task_event = NULL;
1737 static void pushbutton_helper_thread(unsigned long data)
1739 pushbutton_pending = data;
1740 wake_up_process(cpqhp_event_thread);
1744 /* this is the main worker thread */
1745 static int event_thread(void *data)
1747 struct controller *ctrl;
1750 dbg("!!!!event_thread sleeping\n");
1751 set_current_state(TASK_INTERRUPTIBLE);
1754 if (kthread_should_stop())
1757 if (pushbutton_pending)
1758 cpqhp_pushbutton_thread(pushbutton_pending);
1760 for (ctrl = cpqhp_ctrl_list; ctrl; ctrl=ctrl->next)
1761 interrupt_event_handler(ctrl);
1763 dbg("event_thread signals exit\n");
1767 int cpqhp_event_start_thread(void)
1769 cpqhp_event_thread = kthread_run(event_thread, NULL, "phpd_event");
1770 if (IS_ERR(cpqhp_event_thread)) {
1771 err ("Can't start up our event thread\n");
1772 return PTR_ERR(cpqhp_event_thread);
1779 void cpqhp_event_stop_thread(void)
1781 kthread_stop(cpqhp_event_thread);
1785 static int update_slot_info(struct controller *ctrl, struct slot *slot)
1787 struct hotplug_slot_info *info;
1790 info = kmalloc(sizeof(*info), GFP_KERNEL);
1794 info->power_status = get_slot_enabled(ctrl, slot);
1795 info->attention_status = cpq_get_attention_status(ctrl, slot);
1796 info->latch_status = cpq_get_latch_status(ctrl, slot);
1797 info->adapter_status = get_presence_status(ctrl, slot);
1798 result = pci_hp_change_slot_info(slot->hotplug_slot, info);
1803 static void interrupt_event_handler(struct controller *ctrl)
1807 struct pci_func *func;
1809 struct slot *p_slot;
1814 for (loop = 0; loop < 10; loop++) {
1815 /* dbg("loop %d\n", loop); */
1816 if (ctrl->event_queue[loop].event_type != 0) {
1817 hp_slot = ctrl->event_queue[loop].hp_slot;
1819 func = cpqhp_slot_find(ctrl->bus, (hp_slot + ctrl->slot_device_offset), 0);
1823 p_slot = cpqhp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
1827 dbg("hp_slot %d, func %p, p_slot %p\n",
1828 hp_slot, func, p_slot);
1830 if (ctrl->event_queue[loop].event_type == INT_BUTTON_PRESS) {
1831 dbg("button pressed\n");
1832 } else if (ctrl->event_queue[loop].event_type ==
1833 INT_BUTTON_CANCEL) {
1834 dbg("button cancel\n");
1835 del_timer(&p_slot->task_event);
1837 mutex_lock(&ctrl->crit_sect);
1839 if (p_slot->state == BLINKINGOFF_STATE) {
1841 dbg("turn on green LED\n");
1842 green_LED_on (ctrl, hp_slot);
1843 } else if (p_slot->state == BLINKINGON_STATE) {
1845 dbg("turn off green LED\n");
1846 green_LED_off (ctrl, hp_slot);
1849 info(msg_button_cancel, p_slot->number);
1851 p_slot->state = STATIC_STATE;
1853 amber_LED_off (ctrl, hp_slot);
1857 /* Wait for SOBS to be unset */
1858 wait_for_ctrl_irq (ctrl);
1860 mutex_unlock(&ctrl->crit_sect);
1862 /*** button Released (No action on press...) */
1863 else if (ctrl->event_queue[loop].event_type == INT_BUTTON_RELEASE) {
1864 dbg("button release\n");
1866 if (is_slot_enabled (ctrl, hp_slot)) {
1867 dbg("slot is on\n");
1868 p_slot->state = BLINKINGOFF_STATE;
1869 info(msg_button_off, p_slot->number);
1871 dbg("slot is off\n");
1872 p_slot->state = BLINKINGON_STATE;
1873 info(msg_button_on, p_slot->number);
1875 mutex_lock(&ctrl->crit_sect);
1877 dbg("blink green LED and turn off amber\n");
1879 amber_LED_off (ctrl, hp_slot);
1880 green_LED_blink (ctrl, hp_slot);
1884 /* Wait for SOBS to be unset */
1885 wait_for_ctrl_irq (ctrl);
1887 mutex_unlock(&ctrl->crit_sect);
1888 init_timer(&p_slot->task_event);
1889 p_slot->hp_slot = hp_slot;
1890 p_slot->ctrl = ctrl;
1891 /* p_slot->physical_slot = physical_slot; */
1892 p_slot->task_event.expires = jiffies + 5 * HZ; /* 5 second delay */
1893 p_slot->task_event.function = pushbutton_helper_thread;
1894 p_slot->task_event.data = (u32) p_slot;
1896 dbg("add_timer p_slot = %p\n", p_slot);
1897 add_timer(&p_slot->task_event);
1899 /***********POWER FAULT */
1900 else if (ctrl->event_queue[loop].event_type == INT_POWER_FAULT) {
1901 dbg("power fault\n");
1903 /* refresh notification */
1904 update_slot_info(ctrl, p_slot);
1907 ctrl->event_queue[loop].event_type = 0;
1911 } /* End of FOR loop */
1919 * cpqhp_pushbutton_thread - handle pushbutton events
1920 * @slot: target slot (struct)
1922 * Scheduled procedure to handle blocking stuff for the pushbuttons.
1923 * Handles all pending events and exits.
1925 void cpqhp_pushbutton_thread(unsigned long slot)
1929 struct pci_func *func;
1930 struct slot *p_slot = (struct slot *) slot;
1931 struct controller *ctrl = (struct controller *) p_slot->ctrl;
1933 pushbutton_pending = 0;
1934 hp_slot = p_slot->hp_slot;
1936 device = p_slot->device;
1938 if (is_slot_enabled(ctrl, hp_slot)) {
1939 p_slot->state = POWEROFF_STATE;
1940 /* power Down board */
1941 func = cpqhp_slot_find(p_slot->bus, p_slot->device, 0);
1942 dbg("In power_down_board, func = %p, ctrl = %p\n", func, ctrl);
1944 dbg("Error! func NULL in %s\n", __func__);
1948 if (cpqhp_process_SS(ctrl, func) != 0) {
1949 amber_LED_on(ctrl, hp_slot);
1950 green_LED_on(ctrl, hp_slot);
1954 /* Wait for SOBS to be unset */
1955 wait_for_ctrl_irq(ctrl);
1958 p_slot->state = STATIC_STATE;
1960 p_slot->state = POWERON_STATE;
1963 func = cpqhp_slot_find(p_slot->bus, p_slot->device, 0);
1964 dbg("In add_board, func = %p, ctrl = %p\n", func, ctrl);
1966 dbg("Error! func NULL in %s\n", __func__);
1971 if (cpqhp_process_SI(ctrl, func) != 0) {
1972 amber_LED_on(ctrl, hp_slot);
1973 green_LED_off(ctrl, hp_slot);
1977 /* Wait for SOBS to be unset */
1978 wait_for_ctrl_irq (ctrl);
1982 p_slot->state = STATIC_STATE;
1989 int cpqhp_process_SI(struct controller *ctrl, struct pci_func *func)
1995 struct slot *p_slot;
1996 int physical_slot = 0;
2000 device = func->device;
2001 hp_slot = device - ctrl->slot_device_offset;
2002 p_slot = cpqhp_find_slot(ctrl, device);
2004 physical_slot = p_slot->number;
2006 /* Check to see if the interlock is closed */
2007 tempdword = readl(ctrl->hpc_reg + INT_INPUT_CLEAR);
2009 if (tempdword & (0x01 << hp_slot)) {
2013 if (func->is_a_board) {
2014 rc = board_replaced(func, ctrl);
2019 func = cpqhp_slot_create(ctrl->bus);
2023 func->bus = ctrl->bus;
2024 func->device = device;
2026 func->configured = 0;
2027 func->is_a_board = 1;
2029 /* We have to save the presence info for these slots */
2030 temp_word = ctrl->ctrl_int_comp >> 16;
2031 func->presence_save = (temp_word >> hp_slot) & 0x01;
2032 func->presence_save |= (temp_word >> (hp_slot + 7)) & 0x02;
2034 if (ctrl->ctrl_int_comp & (0x1L << hp_slot)) {
2035 func->switch_save = 0;
2037 func->switch_save = 0x10;
2040 rc = board_added(func, ctrl);
2042 if (is_bridge(func)) {
2043 bridge_slot_remove(func);
2047 /* Setup slot structure with entry for empty slot */
2048 func = cpqhp_slot_create(ctrl->bus);
2053 func->bus = ctrl->bus;
2054 func->device = device;
2056 func->configured = 0;
2057 func->is_a_board = 0;
2059 /* We have to save the presence info for these slots */
2060 temp_word = ctrl->ctrl_int_comp >> 16;
2061 func->presence_save = (temp_word >> hp_slot) & 0x01;
2062 func->presence_save |=
2063 (temp_word >> (hp_slot + 7)) & 0x02;
2065 if (ctrl->ctrl_int_comp & (0x1L << hp_slot)) {
2066 func->switch_save = 0;
2068 func->switch_save = 0x10;
2074 dbg("%s: rc = %d\n", __func__, rc);
2078 update_slot_info(ctrl, p_slot);
2084 int cpqhp_process_SS(struct controller *ctrl, struct pci_func *func)
2086 u8 device, class_code, header_type, BCR;
2091 struct slot *p_slot;
2092 struct pci_bus *pci_bus = ctrl->pci_bus;
2093 int physical_slot=0;
2095 device = func->device;
2096 func = cpqhp_slot_find(ctrl->bus, device, index++);
2097 p_slot = cpqhp_find_slot(ctrl, device);
2099 physical_slot = p_slot->number;
2102 /* Make sure there are no video controllers here */
2103 while (func && !rc) {
2104 pci_bus->number = func->bus;
2105 devfn = PCI_DEVFN(func->device, func->function);
2107 /* Check the Class Code */
2108 rc = pci_bus_read_config_byte (pci_bus, devfn, 0x0B, &class_code);
2112 if (class_code == PCI_BASE_CLASS_DISPLAY) {
2113 /* Display/Video adapter (not supported) */
2114 rc = REMOVE_NOT_SUPPORTED;
2116 /* See if it's a bridge */
2117 rc = pci_bus_read_config_byte (pci_bus, devfn, PCI_HEADER_TYPE, &header_type);
2121 /* If it's a bridge, check the VGA Enable bit */
2122 if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) {
2123 rc = pci_bus_read_config_byte (pci_bus, devfn, PCI_BRIDGE_CONTROL, &BCR);
2127 /* If the VGA Enable bit is set, remove isn't
2129 if (BCR & PCI_BRIDGE_CTL_VGA)
2130 rc = REMOVE_NOT_SUPPORTED;
2134 func = cpqhp_slot_find(ctrl->bus, device, index++);
2137 func = cpqhp_slot_find(ctrl->bus, device, 0);
2138 if ((func != NULL) && !rc) {
2139 /* FIXME: Replace flag should be passed into process_SS */
2140 replace_flag = !(ctrl->add_support);
2141 rc = remove_board(func, replace_flag, ctrl);
2147 update_slot_info(ctrl, p_slot);
2153 * switch_leds - switch the leds, go from one site to the other.
2154 * @ctrl: controller to use
2155 * @num_of_slots: number of slots to use
2156 * @work_LED: LED control value
2157 * @direction: 1 to start from the left side, 0 to start right.
2159 static void switch_leds(struct controller *ctrl, const int num_of_slots,
2160 u32 *work_LED, const int direction)
2164 for (loop = 0; loop < num_of_slots; loop++) {
2166 *work_LED = *work_LED >> 1;
2168 *work_LED = *work_LED << 1;
2169 writel(*work_LED, ctrl->hpc_reg + LED_CONTROL);
2173 /* Wait for SOGO interrupt */
2174 wait_for_ctrl_irq(ctrl);
2176 /* Get ready for next iteration */
2177 long_delay((2*HZ)/10);
2182 * cpqhp_hardware_test - runs hardware tests
2183 * @ctrl: target controller
2184 * @test_num: the number written to the "test" file in sysfs.
2186 * For hot plug ctrl folks to play with.
2188 int cpqhp_hardware_test(struct controller *ctrl, int test_num)
2195 num_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0f;
2199 /* Do stuff here! */
2201 /* Do that funky LED thing */
2202 /* so we can restore them later */
2203 save_LED = readl(ctrl->hpc_reg + LED_CONTROL);
2204 work_LED = 0x01010101;
2205 switch_leds(ctrl, num_of_slots, &work_LED, 0);
2206 switch_leds(ctrl, num_of_slots, &work_LED, 1);
2207 switch_leds(ctrl, num_of_slots, &work_LED, 0);
2208 switch_leds(ctrl, num_of_slots, &work_LED, 1);
2210 work_LED = 0x01010000;
2211 writel(work_LED, ctrl->hpc_reg + LED_CONTROL);
2212 switch_leds(ctrl, num_of_slots, &work_LED, 0);
2213 switch_leds(ctrl, num_of_slots, &work_LED, 1);
2214 work_LED = 0x00000101;
2215 writel(work_LED, ctrl->hpc_reg + LED_CONTROL);
2216 switch_leds(ctrl, num_of_slots, &work_LED, 0);
2217 switch_leds(ctrl, num_of_slots, &work_LED, 1);
2219 work_LED = 0x01010000;
2220 writel(work_LED, ctrl->hpc_reg + LED_CONTROL);
2221 for (loop = 0; loop < num_of_slots; loop++) {
2224 /* Wait for SOGO interrupt */
2225 wait_for_ctrl_irq (ctrl);
2227 /* Get ready for next iteration */
2228 long_delay((3*HZ)/10);
2229 work_LED = work_LED >> 16;
2230 writel(work_LED, ctrl->hpc_reg + LED_CONTROL);
2234 /* Wait for SOGO interrupt */
2235 wait_for_ctrl_irq (ctrl);
2237 /* Get ready for next iteration */
2238 long_delay((3*HZ)/10);
2239 work_LED = work_LED << 16;
2240 writel(work_LED, ctrl->hpc_reg + LED_CONTROL);
2241 work_LED = work_LED << 1;
2242 writel(work_LED, ctrl->hpc_reg + LED_CONTROL);
2245 /* put it back the way it was */
2246 writel(save_LED, ctrl->hpc_reg + LED_CONTROL);
2250 /* Wait for SOBS to be unset */
2251 wait_for_ctrl_irq (ctrl);
2254 /* Do other stuff here! */
2265 * configure_new_device - Configures the PCI header information of one board.
2266 * @ctrl: pointer to controller structure
2267 * @func: pointer to function structure
2268 * @behind_bridge: 1 if this is a recursive call, 0 if not
2269 * @resources: pointer to set of resource lists
2271 * Returns 0 if success.
2273 static u32 configure_new_device(struct controller *ctrl, struct pci_func *func,
2274 u8 behind_bridge, struct resource_lists *resources)
2276 u8 temp_byte, function, max_functions, stop_it;
2279 struct pci_func *new_slot;
2284 dbg("%s\n", __func__);
2285 /* Check for Multi-function device */
2286 ctrl->pci_bus->number = func->bus;
2287 rc = pci_bus_read_config_byte (ctrl->pci_bus, PCI_DEVFN(func->device, func->function), 0x0E, &temp_byte);
2289 dbg("%s: rc = %d\n", __func__, rc);
2293 if (temp_byte & 0x80) /* Multi-function device */
2301 rc = configure_new_function(ctrl, new_slot, behind_bridge, resources);
2304 dbg("configure_new_function failed %d\n",rc);
2308 new_slot = cpqhp_slot_find(new_slot->bus, new_slot->device, index++);
2311 cpqhp_return_board_resources(new_slot, resources);
2321 /* The following loop skips to the next present function
2322 * and creates a board structure */
2324 while ((function < max_functions) && (!stop_it)) {
2325 pci_bus_read_config_dword (ctrl->pci_bus, PCI_DEVFN(func->device, function), 0x00, &ID);
2327 if (ID == 0xFFFFFFFF) {
2330 /* Setup slot structure. */
2331 new_slot = cpqhp_slot_create(func->bus);
2333 if (new_slot == NULL)
2336 new_slot->bus = func->bus;
2337 new_slot->device = func->device;
2338 new_slot->function = function;
2339 new_slot->is_a_board = 1;
2340 new_slot->status = 0;
2346 } while (function < max_functions);
2347 dbg("returning from configure_new_device\n");
2354 * Configuration logic that involves the hotplug data structures and
2360 * configure_new_function - Configures the PCI header information of one device
2361 * @ctrl: pointer to controller structure
2362 * @func: pointer to function structure
2363 * @behind_bridge: 1 if this is a recursive call, 0 if not
2364 * @resources: pointer to set of resource lists
2366 * Calls itself recursively for bridged devices.
2367 * Returns 0 if success.
2369 static int configure_new_function(struct controller *ctrl, struct pci_func *func,
2371 struct resource_lists *resources)
2386 struct pci_resource *mem_node;
2387 struct pci_resource *p_mem_node;
2388 struct pci_resource *io_node;
2389 struct pci_resource *bus_node;
2390 struct pci_resource *hold_mem_node;
2391 struct pci_resource *hold_p_mem_node;
2392 struct pci_resource *hold_IO_node;
2393 struct pci_resource *hold_bus_node;
2394 struct irq_mapping irqs;
2395 struct pci_func *new_slot;
2396 struct pci_bus *pci_bus;
2397 struct resource_lists temp_resources;
2399 pci_bus = ctrl->pci_bus;
2400 pci_bus->number = func->bus;
2401 devfn = PCI_DEVFN(func->device, func->function);
2403 /* Check for Bridge */
2404 rc = pci_bus_read_config_byte(pci_bus, devfn, PCI_HEADER_TYPE, &temp_byte);
2408 if ((temp_byte & 0x7F) == PCI_HEADER_TYPE_BRIDGE) {
2409 /* set Primary bus */
2410 dbg("set Primary bus = %d\n", func->bus);
2411 rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_PRIMARY_BUS, func->bus);
2415 /* find range of buses to use */
2416 dbg("find ranges of buses to use\n");
2417 bus_node = get_max_resource(&(resources->bus_head), 1);
2419 /* If we don't have any buses to allocate, we can't continue */
2423 /* set Secondary bus */
2424 temp_byte = bus_node->base;
2425 dbg("set Secondary bus = %d\n", bus_node->base);
2426 rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_SECONDARY_BUS, temp_byte);
2430 /* set subordinate bus */
2431 temp_byte = bus_node->base + bus_node->length - 1;
2432 dbg("set subordinate bus = %d\n", bus_node->base + bus_node->length - 1);
2433 rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_SUBORDINATE_BUS, temp_byte);
2437 /* set subordinate Latency Timer and base Latency Timer */
2439 rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_SEC_LATENCY_TIMER, temp_byte);
2442 rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_LATENCY_TIMER, temp_byte);
2446 /* set Cache Line size */
2448 rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_CACHE_LINE_SIZE, temp_byte);
2452 /* Setup the IO, memory, and prefetchable windows */
2453 io_node = get_max_resource(&(resources->io_head), 0x1000);
2456 mem_node = get_max_resource(&(resources->mem_head), 0x100000);
2459 p_mem_node = get_max_resource(&(resources->p_mem_head), 0x100000);
2462 dbg("Setup the IO, memory, and prefetchable windows\n");
2464 dbg("(base, len, next) (%x, %x, %p)\n", io_node->base,
2465 io_node->length, io_node->next);
2467 dbg("(base, len, next) (%x, %x, %p)\n", mem_node->base,
2468 mem_node->length, mem_node->next);
2469 dbg("p_mem_node\n");
2470 dbg("(base, len, next) (%x, %x, %p)\n", p_mem_node->base,
2471 p_mem_node->length, p_mem_node->next);
2473 /* set up the IRQ info */
2474 if (!resources->irqs) {
2475 irqs.barber_pole = 0;
2476 irqs.interrupt[0] = 0;
2477 irqs.interrupt[1] = 0;
2478 irqs.interrupt[2] = 0;
2479 irqs.interrupt[3] = 0;
2482 irqs.barber_pole = resources->irqs->barber_pole;
2483 irqs.interrupt[0] = resources->irqs->interrupt[0];
2484 irqs.interrupt[1] = resources->irqs->interrupt[1];
2485 irqs.interrupt[2] = resources->irqs->interrupt[2];
2486 irqs.interrupt[3] = resources->irqs->interrupt[3];
2487 irqs.valid_INT = resources->irqs->valid_INT;
2490 /* set up resource lists that are now aligned on top and bottom
2491 * for anything behind the bridge. */
2492 temp_resources.bus_head = bus_node;
2493 temp_resources.io_head = io_node;
2494 temp_resources.mem_head = mem_node;
2495 temp_resources.p_mem_head = p_mem_node;
2496 temp_resources.irqs = &irqs;
2498 /* Make copies of the nodes we are going to pass down so that
2499 * if there is a problem,we can just use these to free resources
2501 hold_bus_node = kmalloc(sizeof(*hold_bus_node), GFP_KERNEL);
2502 hold_IO_node = kmalloc(sizeof(*hold_IO_node), GFP_KERNEL);
2503 hold_mem_node = kmalloc(sizeof(*hold_mem_node), GFP_KERNEL);
2504 hold_p_mem_node = kmalloc(sizeof(*hold_p_mem_node), GFP_KERNEL);
2506 if (!hold_bus_node || !hold_IO_node || !hold_mem_node || !hold_p_mem_node) {
2507 kfree(hold_bus_node);
2508 kfree(hold_IO_node);
2509 kfree(hold_mem_node);
2510 kfree(hold_p_mem_node);
2515 memcpy(hold_bus_node, bus_node, sizeof(struct pci_resource));
2517 bus_node->base += 1;
2518 bus_node->length -= 1;
2519 bus_node->next = NULL;
2521 /* If we have IO resources copy them and fill in the bridge's
2522 * IO range registers */
2523 memcpy(hold_IO_node, io_node, sizeof(struct pci_resource));
2524 io_node->next = NULL;
2526 /* set IO base and Limit registers */
2527 temp_byte = io_node->base >> 8;
2528 rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_IO_BASE, temp_byte);
2530 temp_byte = (io_node->base + io_node->length - 1) >> 8;
2531 rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_IO_LIMIT, temp_byte);
2533 /* Copy the memory resources and fill in the bridge's memory
2536 memcpy(hold_mem_node, mem_node, sizeof(struct pci_resource));
2537 mem_node->next = NULL;
2539 /* set Mem base and Limit registers */
2540 temp_word = mem_node->base >> 16;
2541 rc = pci_bus_write_config_word(pci_bus, devfn, PCI_MEMORY_BASE, temp_word);
2543 temp_word = (mem_node->base + mem_node->length - 1) >> 16;
2544 rc = pci_bus_write_config_word(pci_bus, devfn, PCI_MEMORY_LIMIT, temp_word);
2546 memcpy(hold_p_mem_node, p_mem_node, sizeof(struct pci_resource));
2547 p_mem_node->next = NULL;
2549 /* set Pre Mem base and Limit registers */
2550 temp_word = p_mem_node->base >> 16;
2551 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_PREF_MEMORY_BASE, temp_word);
2553 temp_word = (p_mem_node->base + p_mem_node->length - 1) >> 16;
2554 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_PREF_MEMORY_LIMIT, temp_word);
2556 /* Adjust this to compensate for extra adjustment in first loop
2562 /* Here we actually find the devices and configure them */
2563 for (device = 0; (device <= 0x1F) && !rc; device++) {
2564 irqs.barber_pole = (irqs.barber_pole + 1) & 0x03;
2567 pci_bus->number = hold_bus_node->base;
2568 pci_bus_read_config_dword (pci_bus, PCI_DEVFN(device, 0), 0x00, &ID);
2569 pci_bus->number = func->bus;
2571 if (ID != 0xFFFFFFFF) { /* device present */
2572 /* Setup slot structure. */
2573 new_slot = cpqhp_slot_create(hold_bus_node->base);
2575 if (new_slot == NULL) {
2580 new_slot->bus = hold_bus_node->base;
2581 new_slot->device = device;
2582 new_slot->function = 0;
2583 new_slot->is_a_board = 1;
2584 new_slot->status = 0;
2586 rc = configure_new_device(ctrl, new_slot, 1, &temp_resources);
2587 dbg("configure_new_device rc=0x%x\n",rc);
2588 } /* End of IF (device in slot?) */
2589 } /* End of FOR loop */
2593 /* save the interrupt routing information */
2594 if (resources->irqs) {
2595 resources->irqs->interrupt[0] = irqs.interrupt[0];
2596 resources->irqs->interrupt[1] = irqs.interrupt[1];
2597 resources->irqs->interrupt[2] = irqs.interrupt[2];
2598 resources->irqs->interrupt[3] = irqs.interrupt[3];
2599 resources->irqs->valid_INT = irqs.valid_INT;
2600 } else if (!behind_bridge) {
2601 /* We need to hook up the interrupts here */
2602 for (cloop = 0; cloop < 4; cloop++) {
2603 if (irqs.valid_INT & (0x01 << cloop)) {
2604 rc = cpqhp_set_irq(func->bus, func->device,
2605 cloop + 1, irqs.interrupt[cloop]);
2609 } /* end of for loop */
2611 /* Return unused bus resources
2612 * First use the temporary node to store information for
2614 if (bus_node && temp_resources.bus_head) {
2615 hold_bus_node->length = bus_node->base - hold_bus_node->base;
2617 hold_bus_node->next = func->bus_head;
2618 func->bus_head = hold_bus_node;
2620 temp_byte = temp_resources.bus_head->base - 1;
2622 /* set subordinate bus */
2623 rc = pci_bus_write_config_byte (pci_bus, devfn, PCI_SUBORDINATE_BUS, temp_byte);
2625 if (temp_resources.bus_head->length == 0) {
2626 kfree(temp_resources.bus_head);
2627 temp_resources.bus_head = NULL;
2629 return_resource(&(resources->bus_head), temp_resources.bus_head);
2633 /* If we have IO space available and there is some left,
2634 * return the unused portion */
2635 if (hold_IO_node && temp_resources.io_head) {
2636 io_node = do_pre_bridge_resource_split(&(temp_resources.io_head),
2637 &hold_IO_node, 0x1000);
2639 /* Check if we were able to split something off */
2641 hold_IO_node->base = io_node->base + io_node->length;
2643 temp_byte = (hold_IO_node->base) >> 8;
2644 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_IO_BASE, temp_byte);
2646 return_resource(&(resources->io_head), io_node);
2649 io_node = do_bridge_resource_split(&(temp_resources.io_head), 0x1000);
2651 /* Check if we were able to split something off */
2653 /* First use the temporary node to store
2654 * information for the board */
2655 hold_IO_node->length = io_node->base - hold_IO_node->base;
2657 /* If we used any, add it to the board's list */
2658 if (hold_IO_node->length) {
2659 hold_IO_node->next = func->io_head;
2660 func->io_head = hold_IO_node;
2662 temp_byte = (io_node->base - 1) >> 8;
2663 rc = pci_bus_write_config_byte (pci_bus, devfn, PCI_IO_LIMIT, temp_byte);
2665 return_resource(&(resources->io_head), io_node);
2667 /* it doesn't need any IO */
2669 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_IO_LIMIT, temp_word);
2671 return_resource(&(resources->io_head), io_node);
2672 kfree(hold_IO_node);
2675 /* it used most of the range */
2676 hold_IO_node->next = func->io_head;
2677 func->io_head = hold_IO_node;
2679 } else if (hold_IO_node) {
2680 /* it used the whole range */
2681 hold_IO_node->next = func->io_head;
2682 func->io_head = hold_IO_node;
2684 /* If we have memory space available and there is some left,
2685 * return the unused portion */
2686 if (hold_mem_node && temp_resources.mem_head) {
2687 mem_node = do_pre_bridge_resource_split(&(temp_resources. mem_head),
2688 &hold_mem_node, 0x100000);
2690 /* Check if we were able to split something off */
2692 hold_mem_node->base = mem_node->base + mem_node->length;
2694 temp_word = (hold_mem_node->base) >> 16;
2695 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_MEMORY_BASE, temp_word);
2697 return_resource(&(resources->mem_head), mem_node);
2700 mem_node = do_bridge_resource_split(&(temp_resources.mem_head), 0x100000);
2702 /* Check if we were able to split something off */
2704 /* First use the temporary node to store
2705 * information for the board */
2706 hold_mem_node->length = mem_node->base - hold_mem_node->base;
2708 if (hold_mem_node->length) {
2709 hold_mem_node->next = func->mem_head;
2710 func->mem_head = hold_mem_node;
2712 /* configure end address */
2713 temp_word = (mem_node->base - 1) >> 16;
2714 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_MEMORY_LIMIT, temp_word);
2716 /* Return unused resources to the pool */
2717 return_resource(&(resources->mem_head), mem_node);
2719 /* it doesn't need any Mem */
2721 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_MEMORY_LIMIT, temp_word);
2723 return_resource(&(resources->mem_head), mem_node);
2724 kfree(hold_mem_node);
2727 /* it used most of the range */
2728 hold_mem_node->next = func->mem_head;
2729 func->mem_head = hold_mem_node;
2731 } else if (hold_mem_node) {
2732 /* it used the whole range */
2733 hold_mem_node->next = func->mem_head;
2734 func->mem_head = hold_mem_node;
2736 /* If we have prefetchable memory space available and there
2737 * is some left at the end, return the unused portion */
2738 if (temp_resources.p_mem_head) {
2739 p_mem_node = do_pre_bridge_resource_split(&(temp_resources.p_mem_head),
2740 &hold_p_mem_node, 0x100000);
2742 /* Check if we were able to split something off */
2744 hold_p_mem_node->base = p_mem_node->base + p_mem_node->length;
2746 temp_word = (hold_p_mem_node->base) >> 16;
2747 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_PREF_MEMORY_BASE, temp_word);
2749 return_resource(&(resources->p_mem_head), p_mem_node);
2752 p_mem_node = do_bridge_resource_split(&(temp_resources.p_mem_head), 0x100000);
2754 /* Check if we were able to split something off */
2756 /* First use the temporary node to store
2757 * information for the board */
2758 hold_p_mem_node->length = p_mem_node->base - hold_p_mem_node->base;
2760 /* If we used any, add it to the board's list */
2761 if (hold_p_mem_node->length) {
2762 hold_p_mem_node->next = func->p_mem_head;
2763 func->p_mem_head = hold_p_mem_node;
2765 temp_word = (p_mem_node->base - 1) >> 16;
2766 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_PREF_MEMORY_LIMIT, temp_word);
2768 return_resource(&(resources->p_mem_head), p_mem_node);
2770 /* it doesn't need any PMem */
2772 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_PREF_MEMORY_LIMIT, temp_word);
2774 return_resource(&(resources->p_mem_head), p_mem_node);
2775 kfree(hold_p_mem_node);
2778 /* it used the most of the range */
2779 hold_p_mem_node->next = func->p_mem_head;
2780 func->p_mem_head = hold_p_mem_node;
2782 } else if (hold_p_mem_node) {
2783 /* it used the whole range */
2784 hold_p_mem_node->next = func->p_mem_head;
2785 func->p_mem_head = hold_p_mem_node;
2787 /* We should be configuring an IRQ and the bridge's base address
2788 * registers if it needs them. Although we have never seen such
2792 command = 0x0157; /* = PCI_COMMAND_IO |
2793 * PCI_COMMAND_MEMORY |
2794 * PCI_COMMAND_MASTER |
2795 * PCI_COMMAND_INVALIDATE |
2796 * PCI_COMMAND_PARITY |
2797 * PCI_COMMAND_SERR */
2798 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_COMMAND, command);
2800 /* set Bridge Control Register */
2801 command = 0x07; /* = PCI_BRIDGE_CTL_PARITY |
2802 * PCI_BRIDGE_CTL_SERR |
2803 * PCI_BRIDGE_CTL_NO_ISA */
2804 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_BRIDGE_CONTROL, command);
2805 } else if ((temp_byte & 0x7F) == PCI_HEADER_TYPE_NORMAL) {
2806 /* Standard device */
2807 rc = pci_bus_read_config_byte (pci_bus, devfn, 0x0B, &class_code);
2809 if (class_code == PCI_BASE_CLASS_DISPLAY) {
2810 /* Display (video) adapter (not supported) */
2811 return DEVICE_TYPE_NOT_SUPPORTED;
2813 /* Figure out IO and memory needs */
2814 for (cloop = 0x10; cloop <= 0x24; cloop += 4) {
2815 temp_register = 0xFFFFFFFF;
2817 dbg("CND: bus=%d, devfn=%d, offset=%d\n", pci_bus->number, devfn, cloop);
2818 rc = pci_bus_write_config_dword (pci_bus, devfn, cloop, temp_register);
2820 rc = pci_bus_read_config_dword (pci_bus, devfn, cloop, &temp_register);
2821 dbg("CND: base = 0x%x\n", temp_register);
2823 if (temp_register) { /* If this register is implemented */
2824 if ((temp_register & 0x03L) == 0x01) {
2827 /* set base = amount of IO space */
2828 base = temp_register & 0xFFFFFFFC;
2831 dbg("CND: length = 0x%x\n", base);
2832 io_node = get_io_resource(&(resources->io_head), base);
2833 dbg("Got io_node start = %8.8x, length = %8.8x next (%p)\n",
2834 io_node->base, io_node->length, io_node->next);
2835 dbg("func (%p) io_head (%p)\n", func, func->io_head);
2837 /* allocate the resource to the board */
2839 base = io_node->base;
2841 io_node->next = func->io_head;
2842 func->io_head = io_node;
2845 } else if ((temp_register & 0x0BL) == 0x08) {
2846 /* Map prefetchable memory */
2847 base = temp_register & 0xFFFFFFF0;
2850 dbg("CND: length = 0x%x\n", base);
2851 p_mem_node = get_resource(&(resources->p_mem_head), base);
2853 /* allocate the resource to the board */
2855 base = p_mem_node->base;
2857 p_mem_node->next = func->p_mem_head;
2858 func->p_mem_head = p_mem_node;
2861 } else if ((temp_register & 0x0BL) == 0x00) {
2863 base = temp_register & 0xFFFFFFF0;
2866 dbg("CND: length = 0x%x\n", base);
2867 mem_node = get_resource(&(resources->mem_head), base);
2869 /* allocate the resource to the board */
2871 base = mem_node->base;
2873 mem_node->next = func->mem_head;
2874 func->mem_head = mem_node;
2878 /* Reserved bits or requesting space below 1M */
2879 return NOT_ENOUGH_RESOURCES;
2882 rc = pci_bus_write_config_dword(pci_bus, devfn, cloop, base);
2884 /* Check for 64-bit base */
2885 if ((temp_register & 0x07L) == 0x04) {
2888 /* Upper 32 bits of address always zero
2889 * on today's systems */
2890 /* FIXME this is probably not true on
2891 * Alpha and ia64??? */
2893 rc = pci_bus_write_config_dword(pci_bus, devfn, cloop, base);
2896 } /* End of base register loop */
2897 if (cpqhp_legacy_mode) {
2898 /* Figure out which interrupt pin this function uses */
2899 rc = pci_bus_read_config_byte (pci_bus, devfn,
2900 PCI_INTERRUPT_PIN, &temp_byte);
2902 /* If this function needs an interrupt and we are behind
2903 * a bridge and the pin is tied to something that's
2904 * already mapped, set this one the same */
2905 if (temp_byte && resources->irqs &&
2906 (resources->irqs->valid_INT &
2907 (0x01 << ((temp_byte + resources->irqs->barber_pole - 1) & 0x03)))) {
2908 /* We have to share with something already set up */
2909 IRQ = resources->irqs->interrupt[(temp_byte +
2910 resources->irqs->barber_pole - 1) & 0x03];
2912 /* Program IRQ based on card type */
2913 rc = pci_bus_read_config_byte (pci_bus, devfn, 0x0B, &class_code);
2915 if (class_code == PCI_BASE_CLASS_STORAGE)
2916 IRQ = cpqhp_disk_irq;
2918 IRQ = cpqhp_nic_irq;
2922 rc = pci_bus_write_config_byte (pci_bus, devfn, PCI_INTERRUPT_LINE, IRQ);
2925 if (!behind_bridge) {
2926 rc = cpqhp_set_irq(func->bus, func->device, temp_byte, IRQ);
2930 /* TBD - this code may also belong in the other clause
2931 * of this If statement */
2932 resources->irqs->interrupt[(temp_byte + resources->irqs->barber_pole - 1) & 0x03] = IRQ;
2933 resources->irqs->valid_INT |= 0x01 << (temp_byte + resources->irqs->barber_pole - 1) & 0x03;
2938 rc = pci_bus_write_config_byte(pci_bus, devfn,
2939 PCI_LATENCY_TIMER, temp_byte);
2941 /* Cache Line size */
2943 rc = pci_bus_write_config_byte(pci_bus, devfn,
2944 PCI_CACHE_LINE_SIZE, temp_byte);
2946 /* disable ROM base Address */
2948 rc = pci_bus_write_config_word(pci_bus, devfn,
2949 PCI_ROM_ADDRESS, temp_dword);
2952 temp_word = 0x0157; /* = PCI_COMMAND_IO |
2953 * PCI_COMMAND_MEMORY |
2954 * PCI_COMMAND_MASTER |
2955 * PCI_COMMAND_INVALIDATE |
2956 * PCI_COMMAND_PARITY |
2957 * PCI_COMMAND_SERR */
2958 rc = pci_bus_write_config_word (pci_bus, devfn,
2959 PCI_COMMAND, temp_word);
2960 } else { /* End of Not-A-Bridge else */
2961 /* It's some strange type of PCI adapter (Cardbus?) */
2962 return DEVICE_TYPE_NOT_SUPPORTED;
2965 func->configured = 1;
2969 cpqhp_destroy_resource_list (&temp_resources);
2971 return_resource(&(resources-> bus_head), hold_bus_node);
2972 return_resource(&(resources-> io_head), hold_IO_node);
2973 return_resource(&(resources-> mem_head), hold_mem_node);
2974 return_resource(&(resources-> p_mem_head), hold_p_mem_node);