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) {
712 temp->next = max->next;
724 * get_resource - find resource of given size and split up larger ones.
725 * @head: the list to search for resources
726 * @size: the size limit to use
728 * Description: This function sorts the resource list by size and then
729 * returns the first node of "size" length. If it finds a node
730 * larger than "size" it will split it up.
732 * size must be a power of two.
734 static struct pci_resource *get_resource(struct pci_resource **head, u32 size)
736 struct pci_resource *prevnode;
737 struct pci_resource *node;
738 struct pci_resource *split_node;
741 if (cpqhp_resource_sort_and_combine(head))
744 if (sort_by_size(head))
747 for (node = *head; node; node = node->next) {
748 dbg("%s: req_size =%x node=%p, base=%x, length=%x\n",
749 __func__, size, node, node->base, node->length);
750 if (node->length < size)
753 if (node->base & (size - 1)) {
754 dbg("%s: not aligned\n", __func__);
755 /* this one isn't base aligned properly
756 * so we'll make a new entry and split it up
758 temp_dword = (node->base | (size-1)) + 1;
760 /* Short circuit if adjusted size is too small */
761 if ((node->length - (temp_dword - node->base)) < size)
764 split_node = kmalloc(sizeof(*split_node), GFP_KERNEL);
769 split_node->base = node->base;
770 split_node->length = temp_dword - node->base;
771 node->base = temp_dword;
772 node->length -= split_node->length;
774 split_node->next = node->next;
775 node->next = split_node;
776 } /* End of non-aligned base */
778 /* Don't need to check if too small since we already did */
779 if (node->length > size) {
780 dbg("%s: too big\n", __func__);
781 /* this one is longer than we need
782 * so we'll make a new entry and split it up
784 split_node = kmalloc(sizeof(*split_node), GFP_KERNEL);
789 split_node->base = node->base + size;
790 split_node->length = node->length - size;
793 /* Put it in the list */
794 split_node->next = node->next;
795 node->next = split_node;
796 } /* End of too big on top end */
798 dbg("%s: got one!!!\n", __func__);
799 /* If we got here, then it is the right size
800 * Now take it out of the list */
805 while (prevnode->next != node)
806 prevnode = prevnode->next;
808 prevnode->next = node->next;
818 * cpqhp_resource_sort_and_combine - sort nodes by base addresses and clean up
819 * @head: the list to sort and clean up
821 * Description: Sorts all of the nodes in the list in ascending order by
822 * their base addresses. Also does garbage collection by
823 * combining adjacent nodes.
825 * Returns %0 if success.
827 int cpqhp_resource_sort_and_combine(struct pci_resource **head)
829 struct pci_resource *node1;
830 struct pci_resource *node2;
831 int out_of_order = 1;
833 dbg("%s: head = %p, *head = %p\n", __func__, head, *head);
838 dbg("*head->next = %p\n",(*head)->next);
841 return 0; /* only one item on the list, already sorted! */
843 dbg("*head->base = 0x%x\n",(*head)->base);
844 dbg("*head->next->base = 0x%x\n",(*head)->next->base);
845 while (out_of_order) {
848 /* Special case for swapping list head */
849 if (((*head)->next) &&
850 ((*head)->base > (*head)->next->base)) {
852 (*head) = (*head)->next;
853 node1->next = (*head)->next;
854 (*head)->next = node1;
860 while (node1->next && node1->next->next) {
861 if (node1->next->base > node1->next->next->base) {
864 node1->next = node1->next->next;
866 node2->next = node1->next;
871 } /* End of out_of_order loop */
875 while (node1 && node1->next) {
876 if ((node1->base + node1->length) == node1->next->base) {
879 node1->length += node1->next->length;
881 node1->next = node1->next->next;
891 irqreturn_t cpqhp_ctrl_intr(int IRQ, void *data)
893 struct controller *ctrl = data;
894 u8 schedule_flag = 0;
901 misc = readw(ctrl->hpc_reg + MISC);
903 * Check to see if it was our interrupt
905 if (!(misc & 0x000C)) {
911 * Serial Output interrupt Pending
914 /* Clear the interrupt */
916 writew(misc, ctrl->hpc_reg + MISC);
918 /* Read to clear posted writes */
919 misc = readw(ctrl->hpc_reg + MISC);
921 dbg ("%s - waking up\n", __func__);
922 wake_up_interruptible(&ctrl->queue);
926 /* General-interrupt-input interrupt Pending */
927 Diff = readl(ctrl->hpc_reg + INT_INPUT_CLEAR) ^ ctrl->ctrl_int_comp;
929 ctrl->ctrl_int_comp = readl(ctrl->hpc_reg + INT_INPUT_CLEAR);
931 /* Clear the interrupt */
932 writel(Diff, ctrl->hpc_reg + INT_INPUT_CLEAR);
934 /* Read it back to clear any posted writes */
935 temp_dword = readl(ctrl->hpc_reg + INT_INPUT_CLEAR);
938 /* Clear all interrupts */
939 writel(0xFFFFFFFF, ctrl->hpc_reg + INT_INPUT_CLEAR);
941 schedule_flag += handle_switch_change((u8)(Diff & 0xFFL), ctrl);
942 schedule_flag += handle_presence_change((u16)((Diff & 0xFFFF0000L) >> 16), ctrl);
943 schedule_flag += handle_power_fault((u8)((Diff & 0xFF00L) >> 8), ctrl);
946 reset = readb(ctrl->hpc_reg + RESET_FREQ_MODE);
948 /* Bus reset has completed */
950 writeb(reset, ctrl->hpc_reg + RESET_FREQ_MODE);
951 reset = readb(ctrl->hpc_reg + RESET_FREQ_MODE);
952 wake_up_interruptible(&ctrl->queue);
956 wake_up_process(cpqhp_event_thread);
957 dbg("Waking even thread");
964 * cpqhp_slot_create - Creates a node and adds it to the proper bus.
965 * @busnumber: bus where new node is to be located
967 * Returns pointer to the new node or %NULL if unsuccessful.
969 struct pci_func *cpqhp_slot_create(u8 busnumber)
971 struct pci_func *new_slot;
972 struct pci_func *next;
974 new_slot = kzalloc(sizeof(*new_slot), GFP_KERNEL);
975 if (new_slot == NULL)
978 new_slot->next = NULL;
979 new_slot->configured = 1;
981 if (cpqhp_slot_list[busnumber] == NULL) {
982 cpqhp_slot_list[busnumber] = new_slot;
984 next = cpqhp_slot_list[busnumber];
985 while (next->next != NULL)
987 next->next = new_slot;
994 * slot_remove - Removes a node from the linked list of slots.
995 * @old_slot: slot to remove
997 * Returns %0 if successful, !0 otherwise.
999 static int slot_remove(struct pci_func * old_slot)
1001 struct pci_func *next;
1003 if (old_slot == NULL)
1006 next = cpqhp_slot_list[old_slot->bus];
1010 if (next == old_slot) {
1011 cpqhp_slot_list[old_slot->bus] = old_slot->next;
1012 cpqhp_destroy_board_resources(old_slot);
1017 while ((next->next != old_slot) && (next->next != NULL))
1020 if (next->next == old_slot) {
1021 next->next = old_slot->next;
1022 cpqhp_destroy_board_resources(old_slot);
1031 * bridge_slot_remove - Removes a node from the linked list of slots.
1032 * @bridge: bridge to remove
1034 * Returns %0 if successful, !0 otherwise.
1036 static int bridge_slot_remove(struct pci_func *bridge)
1038 u8 subordinateBus, secondaryBus;
1040 struct pci_func *next;
1042 secondaryBus = (bridge->config_space[0x06] >> 8) & 0xFF;
1043 subordinateBus = (bridge->config_space[0x06] >> 16) & 0xFF;
1045 for (tempBus = secondaryBus; tempBus <= subordinateBus; tempBus++) {
1046 next = cpqhp_slot_list[tempBus];
1048 while (!slot_remove(next))
1049 next = cpqhp_slot_list[tempBus];
1052 next = cpqhp_slot_list[bridge->bus];
1057 if (next == bridge) {
1058 cpqhp_slot_list[bridge->bus] = bridge->next;
1062 while ((next->next != bridge) && (next->next != NULL))
1065 if (next->next != bridge)
1067 next->next = bridge->next;
1075 * cpqhp_slot_find - Looks for a node by bus, and device, multiple functions accessed
1077 * @device: device to find
1078 * @index: is %0 for first function found, %1 for the second...
1080 * Returns pointer to the node if successful, %NULL otherwise.
1082 struct pci_func *cpqhp_slot_find(u8 bus, u8 device, u8 index)
1085 struct pci_func *func;
1087 func = cpqhp_slot_list[bus];
1089 if ((func == NULL) || ((func->device == device) && (index == 0)))
1092 if (func->device == device)
1095 while (func->next != NULL) {
1098 if (func->device == device)
1109 /* DJZ: I don't think is_bridge will work as is.
1111 static int is_bridge(struct pci_func * func)
1113 /* Check the header type */
1114 if (((func->config_space[0x03] >> 16) & 0xFF) == 0x01)
1122 * set_controller_speed - set the frequency and/or mode of a specific controller segment.
1123 * @ctrl: controller to change frequency/mode for.
1124 * @adapter_speed: the speed of the adapter we want to match.
1125 * @hp_slot: the slot number where the adapter is installed.
1127 * Returns %0 if we successfully change frequency and/or mode to match the
1130 static u8 set_controller_speed(struct controller *ctrl, u8 adapter_speed, u8 hp_slot)
1134 u8 slot_power = readb(ctrl->hpc_reg + SLOT_POWER);
1136 u32 leds = readl(ctrl->hpc_reg + LED_CONTROL);
1138 if (ctrl->speed == adapter_speed)
1141 /* We don't allow freq/mode changes if we find another adapter running
1142 * in another slot on this controller
1144 for(slot = ctrl->slot; slot; slot = slot->next) {
1145 if (slot->device == (hp_slot + ctrl->slot_device_offset))
1147 if (!slot->hotplug_slot || !slot->hotplug_slot->info)
1149 if (slot->hotplug_slot->info->adapter_status == 0)
1151 /* If another adapter is running on the same segment but at a
1152 * lower speed/mode, we allow the new adapter to function at
1153 * this rate if supported
1155 if (ctrl->speed < adapter_speed)
1161 /* If the controller doesn't support freq/mode changes and the
1162 * controller is running at a higher mode, we bail
1164 if ((ctrl->speed > adapter_speed) && (!ctrl->pcix_speed_capability))
1167 /* But we allow the adapter to run at a lower rate if possible */
1168 if ((ctrl->speed < adapter_speed) && (!ctrl->pcix_speed_capability))
1171 /* We try to set the max speed supported by both the adapter and
1174 if (ctrl->speed_capability < adapter_speed) {
1175 if (ctrl->speed == ctrl->speed_capability)
1177 adapter_speed = ctrl->speed_capability;
1180 writel(0x0L, ctrl->hpc_reg + LED_CONTROL);
1181 writeb(0x00, ctrl->hpc_reg + SLOT_ENABLE);
1184 wait_for_ctrl_irq(ctrl);
1186 if (adapter_speed != PCI_SPEED_133MHz_PCIX)
1190 pci_write_config_byte(ctrl->pci_dev, 0x41, reg);
1192 reg16 = readw(ctrl->hpc_reg + NEXT_CURR_FREQ);
1194 switch(adapter_speed) {
1195 case(PCI_SPEED_133MHz_PCIX):
1199 case(PCI_SPEED_100MHz_PCIX):
1203 case(PCI_SPEED_66MHz_PCIX):
1207 case(PCI_SPEED_66MHz):
1211 default: /* 33MHz PCI 2.2 */
1217 writew(reg16, ctrl->hpc_reg + NEXT_CURR_FREQ);
1221 /* Reenable interrupts */
1222 writel(0, ctrl->hpc_reg + INT_MASK);
1224 pci_write_config_byte(ctrl->pci_dev, 0x41, reg);
1226 /* Restart state machine */
1228 pci_read_config_byte(ctrl->pci_dev, 0x43, ®);
1229 pci_write_config_byte(ctrl->pci_dev, 0x43, reg);
1231 /* Only if mode change...*/
1232 if (((ctrl->speed == PCI_SPEED_66MHz) && (adapter_speed == PCI_SPEED_66MHz_PCIX)) ||
1233 ((ctrl->speed == PCI_SPEED_66MHz_PCIX) && (adapter_speed == PCI_SPEED_66MHz)))
1236 wait_for_ctrl_irq(ctrl);
1239 /* Restore LED/Slot state */
1240 writel(leds, ctrl->hpc_reg + LED_CONTROL);
1241 writeb(slot_power, ctrl->hpc_reg + SLOT_ENABLE);
1244 wait_for_ctrl_irq(ctrl);
1246 ctrl->speed = adapter_speed;
1247 slot = cpqhp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
1249 info("Successfully changed frequency/mode for adapter in slot %d\n",
1254 /* the following routines constitute the bulk of the
1255 * hotplug controller logic
1260 * board_replaced - Called after a board has been replaced in the system.
1261 * @func: PCI device/function information
1262 * @ctrl: hotplug controller
1264 * This is only used if we don't have resources for hot add.
1265 * Turns power on for the board.
1266 * Checks to see if board is the same.
1267 * If board is same, reconfigures it.
1268 * If board isn't same, turns it back off.
1270 static u32 board_replaced(struct pci_func *func, struct controller *ctrl)
1277 hp_slot = func->device - ctrl->slot_device_offset;
1280 * The switch is open.
1282 if (readl(ctrl->hpc_reg + INT_INPUT_CLEAR) & (0x01L << hp_slot))
1283 rc = INTERLOCK_OPEN;
1285 * The board is already on
1287 else if (is_slot_enabled (ctrl, hp_slot))
1288 rc = CARD_FUNCTIONING;
1290 mutex_lock(&ctrl->crit_sect);
1292 /* turn on board without attaching to the bus */
1293 enable_slot_power (ctrl, hp_slot);
1297 /* Wait for SOBS to be unset */
1298 wait_for_ctrl_irq (ctrl);
1300 /* Change bits in slot power register to force another shift out
1301 * NOTE: this is to work around the timer bug */
1302 temp_byte = readb(ctrl->hpc_reg + SLOT_POWER);
1303 writeb(0x00, ctrl->hpc_reg + SLOT_POWER);
1304 writeb(temp_byte, ctrl->hpc_reg + SLOT_POWER);
1308 /* Wait for SOBS to be unset */
1309 wait_for_ctrl_irq (ctrl);
1311 adapter_speed = get_adapter_speed(ctrl, hp_slot);
1312 if (ctrl->speed != adapter_speed)
1313 if (set_controller_speed(ctrl, adapter_speed, hp_slot))
1314 rc = WRONG_BUS_FREQUENCY;
1316 /* turn off board without attaching to the bus */
1317 disable_slot_power (ctrl, hp_slot);
1321 /* Wait for SOBS to be unset */
1322 wait_for_ctrl_irq (ctrl);
1324 mutex_unlock(&ctrl->crit_sect);
1329 mutex_lock(&ctrl->crit_sect);
1331 slot_enable (ctrl, hp_slot);
1332 green_LED_blink (ctrl, hp_slot);
1334 amber_LED_off (ctrl, hp_slot);
1338 /* Wait for SOBS to be unset */
1339 wait_for_ctrl_irq (ctrl);
1341 mutex_unlock(&ctrl->crit_sect);
1343 /* Wait for ~1 second because of hot plug spec */
1346 /* Check for a power fault */
1347 if (func->status == 0xFF) {
1348 /* power fault occurred, but it was benign */
1352 rc = cpqhp_valid_replace(ctrl, func);
1355 /* It must be the same board */
1357 rc = cpqhp_configure_board(ctrl, func);
1359 /* If configuration fails, turn it off
1360 * Get slot won't work for devices behind
1361 * bridges, but in this case it will always be
1362 * called for the "base" bus/dev/func of an
1366 mutex_lock(&ctrl->crit_sect);
1368 amber_LED_on (ctrl, hp_slot);
1369 green_LED_off (ctrl, hp_slot);
1370 slot_disable (ctrl, hp_slot);
1374 /* Wait for SOBS to be unset */
1375 wait_for_ctrl_irq (ctrl);
1377 mutex_unlock(&ctrl->crit_sect);
1385 /* Something is wrong
1387 * Get slot won't work for devices behind bridges, but
1388 * in this case it will always be called for the "base"
1389 * bus/dev/func of an adapter.
1392 mutex_lock(&ctrl->crit_sect);
1394 amber_LED_on (ctrl, hp_slot);
1395 green_LED_off (ctrl, hp_slot);
1396 slot_disable (ctrl, hp_slot);
1400 /* Wait for SOBS to be unset */
1401 wait_for_ctrl_irq (ctrl);
1403 mutex_unlock(&ctrl->crit_sect);
1413 * board_added - Called after a board has been added to the system.
1414 * @func: PCI device/function info
1415 * @ctrl: hotplug controller
1417 * Turns power on for the board.
1420 static u32 board_added(struct pci_func *func, struct controller *ctrl)
1426 u32 temp_register = 0xFFFFFFFF;
1428 struct pci_func *new_slot = NULL;
1429 struct slot *p_slot;
1430 struct resource_lists res_lists;
1432 hp_slot = func->device - ctrl->slot_device_offset;
1433 dbg("%s: func->device, slot_offset, hp_slot = %d, %d ,%d\n",
1434 __func__, func->device, ctrl->slot_device_offset, hp_slot);
1436 mutex_lock(&ctrl->crit_sect);
1438 /* turn on board without attaching to the bus */
1439 enable_slot_power(ctrl, hp_slot);
1443 /* Wait for SOBS to be unset */
1444 wait_for_ctrl_irq (ctrl);
1446 /* Change bits in slot power register to force another shift out
1447 * NOTE: this is to work around the timer bug
1449 temp_byte = readb(ctrl->hpc_reg + SLOT_POWER);
1450 writeb(0x00, ctrl->hpc_reg + SLOT_POWER);
1451 writeb(temp_byte, ctrl->hpc_reg + SLOT_POWER);
1455 /* Wait for SOBS to be unset */
1456 wait_for_ctrl_irq (ctrl);
1458 adapter_speed = get_adapter_speed(ctrl, hp_slot);
1459 if (ctrl->speed != adapter_speed)
1460 if (set_controller_speed(ctrl, adapter_speed, hp_slot))
1461 rc = WRONG_BUS_FREQUENCY;
1463 /* turn off board without attaching to the bus */
1464 disable_slot_power (ctrl, hp_slot);
1468 /* Wait for SOBS to be unset */
1469 wait_for_ctrl_irq(ctrl);
1471 mutex_unlock(&ctrl->crit_sect);
1476 p_slot = cpqhp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
1478 /* turn on board and blink green LED */
1480 dbg("%s: before down\n", __func__);
1481 mutex_lock(&ctrl->crit_sect);
1482 dbg("%s: after down\n", __func__);
1484 dbg("%s: before slot_enable\n", __func__);
1485 slot_enable (ctrl, hp_slot);
1487 dbg("%s: before green_LED_blink\n", __func__);
1488 green_LED_blink (ctrl, hp_slot);
1490 dbg("%s: before amber_LED_blink\n", __func__);
1491 amber_LED_off (ctrl, hp_slot);
1493 dbg("%s: before set_SOGO\n", __func__);
1496 /* Wait for SOBS to be unset */
1497 dbg("%s: before wait_for_ctrl_irq\n", __func__);
1498 wait_for_ctrl_irq (ctrl);
1499 dbg("%s: after wait_for_ctrl_irq\n", __func__);
1501 dbg("%s: before up\n", __func__);
1502 mutex_unlock(&ctrl->crit_sect);
1503 dbg("%s: after up\n", __func__);
1505 /* Wait for ~1 second because of hot plug spec */
1506 dbg("%s: before long_delay\n", __func__);
1508 dbg("%s: after long_delay\n", __func__);
1510 dbg("%s: func status = %x\n", __func__, func->status);
1511 /* Check for a power fault */
1512 if (func->status == 0xFF) {
1513 /* power fault occurred, but it was benign */
1514 temp_register = 0xFFFFFFFF;
1515 dbg("%s: temp register set to %x by power fault\n", __func__, temp_register);
1519 /* Get vendor/device ID u32 */
1520 ctrl->pci_bus->number = func->bus;
1521 rc = pci_bus_read_config_dword (ctrl->pci_bus, PCI_DEVFN(func->device, func->function), PCI_VENDOR_ID, &temp_register);
1522 dbg("%s: pci_read_config_dword returns %d\n", __func__, rc);
1523 dbg("%s: temp_register is %x\n", __func__, temp_register);
1526 /* Something's wrong here */
1527 temp_register = 0xFFFFFFFF;
1528 dbg("%s: temp register set to %x by error\n", __func__, temp_register);
1530 /* Preset return code. It will be changed later if things go okay. */
1531 rc = NO_ADAPTER_PRESENT;
1534 /* All F's is an empty slot or an invalid board */
1535 if (temp_register != 0xFFFFFFFF) {
1536 res_lists.io_head = ctrl->io_head;
1537 res_lists.mem_head = ctrl->mem_head;
1538 res_lists.p_mem_head = ctrl->p_mem_head;
1539 res_lists.bus_head = ctrl->bus_head;
1540 res_lists.irqs = NULL;
1542 rc = configure_new_device(ctrl, func, 0, &res_lists);
1544 dbg("%s: back from configure_new_device\n", __func__);
1545 ctrl->io_head = res_lists.io_head;
1546 ctrl->mem_head = res_lists.mem_head;
1547 ctrl->p_mem_head = res_lists.p_mem_head;
1548 ctrl->bus_head = res_lists.bus_head;
1550 cpqhp_resource_sort_and_combine(&(ctrl->mem_head));
1551 cpqhp_resource_sort_and_combine(&(ctrl->p_mem_head));
1552 cpqhp_resource_sort_and_combine(&(ctrl->io_head));
1553 cpqhp_resource_sort_and_combine(&(ctrl->bus_head));
1556 mutex_lock(&ctrl->crit_sect);
1558 amber_LED_on (ctrl, hp_slot);
1559 green_LED_off (ctrl, hp_slot);
1560 slot_disable (ctrl, hp_slot);
1564 /* Wait for SOBS to be unset */
1565 wait_for_ctrl_irq (ctrl);
1567 mutex_unlock(&ctrl->crit_sect);
1570 cpqhp_save_slot_config(ctrl, func);
1575 func->switch_save = 0x10;
1576 func->is_a_board = 0x01;
1578 /* next, we will instantiate the linux pci_dev structures (with
1579 * appropriate driver notification, if already present) */
1580 dbg("%s: configure linux pci_dev structure\n", __func__);
1583 new_slot = cpqhp_slot_find(ctrl->bus, func->device, index++);
1584 if (new_slot && !new_slot->pci_dev)
1585 cpqhp_configure_device(ctrl, new_slot);
1588 mutex_lock(&ctrl->crit_sect);
1590 green_LED_on (ctrl, hp_slot);
1594 /* Wait for SOBS to be unset */
1595 wait_for_ctrl_irq (ctrl);
1597 mutex_unlock(&ctrl->crit_sect);
1599 mutex_lock(&ctrl->crit_sect);
1601 amber_LED_on (ctrl, hp_slot);
1602 green_LED_off (ctrl, hp_slot);
1603 slot_disable (ctrl, hp_slot);
1607 /* Wait for SOBS to be unset */
1608 wait_for_ctrl_irq (ctrl);
1610 mutex_unlock(&ctrl->crit_sect);
1619 * remove_board - Turns off slot and LEDs
1620 * @func: PCI device/function info
1621 * @replace_flag: whether replacing or adding a new device
1622 * @ctrl: target controller
1624 static u32 remove_board(struct pci_func * func, u32 replace_flag, struct controller * ctrl)
1632 struct resource_lists res_lists;
1633 struct pci_func *temp_func;
1635 if (cpqhp_unconfigure_device(func))
1638 device = func->device;
1640 hp_slot = func->device - ctrl->slot_device_offset;
1641 dbg("In %s, hp_slot = %d\n", __func__, hp_slot);
1643 /* When we get here, it is safe to change base address registers.
1644 * We will attempt to save the base address register lengths */
1645 if (replace_flag || !ctrl->add_support)
1646 rc = cpqhp_save_base_addr_length(ctrl, func);
1647 else if (!func->bus_head && !func->mem_head &&
1648 !func->p_mem_head && !func->io_head) {
1649 /* Here we check to see if we've saved any of the board's
1650 * resources already. If so, we'll skip the attempt to
1651 * determine what's being used. */
1653 temp_func = cpqhp_slot_find(func->bus, func->device, index++);
1655 if (temp_func->bus_head || temp_func->mem_head
1656 || temp_func->p_mem_head || temp_func->io_head) {
1660 temp_func = cpqhp_slot_find(temp_func->bus, temp_func->device, index++);
1664 rc = cpqhp_save_used_resources(ctrl, func);
1666 /* Change status to shutdown */
1667 if (func->is_a_board)
1668 func->status = 0x01;
1669 func->configured = 0;
1671 mutex_lock(&ctrl->crit_sect);
1673 green_LED_off (ctrl, hp_slot);
1674 slot_disable (ctrl, hp_slot);
1678 /* turn off SERR for slot */
1679 temp_byte = readb(ctrl->hpc_reg + SLOT_SERR);
1680 temp_byte &= ~(0x01 << hp_slot);
1681 writeb(temp_byte, ctrl->hpc_reg + SLOT_SERR);
1683 /* Wait for SOBS to be unset */
1684 wait_for_ctrl_irq (ctrl);
1686 mutex_unlock(&ctrl->crit_sect);
1688 if (!replace_flag && ctrl->add_support) {
1690 res_lists.io_head = ctrl->io_head;
1691 res_lists.mem_head = ctrl->mem_head;
1692 res_lists.p_mem_head = ctrl->p_mem_head;
1693 res_lists.bus_head = ctrl->bus_head;
1695 cpqhp_return_board_resources(func, &res_lists);
1697 ctrl->io_head = res_lists.io_head;
1698 ctrl->mem_head = res_lists.mem_head;
1699 ctrl->p_mem_head = res_lists.p_mem_head;
1700 ctrl->bus_head = res_lists.bus_head;
1702 cpqhp_resource_sort_and_combine(&(ctrl->mem_head));
1703 cpqhp_resource_sort_and_combine(&(ctrl->p_mem_head));
1704 cpqhp_resource_sort_and_combine(&(ctrl->io_head));
1705 cpqhp_resource_sort_and_combine(&(ctrl->bus_head));
1707 if (is_bridge(func)) {
1708 bridge_slot_remove(func);
1712 func = cpqhp_slot_find(ctrl->bus, device, 0);
1715 /* Setup slot structure with entry for empty slot */
1716 func = cpqhp_slot_create(ctrl->bus);
1721 func->bus = ctrl->bus;
1722 func->device = device;
1724 func->configured = 0;
1725 func->switch_save = 0x10;
1726 func->is_a_board = 0;
1727 func->p_task_event = NULL;
1733 static void pushbutton_helper_thread(unsigned long data)
1735 pushbutton_pending = data;
1736 wake_up_process(cpqhp_event_thread);
1740 /* this is the main worker thread */
1741 static int event_thread(void* data)
1743 struct controller *ctrl;
1746 dbg("!!!!event_thread sleeping\n");
1747 set_current_state(TASK_INTERRUPTIBLE);
1750 if (kthread_should_stop())
1753 if (pushbutton_pending)
1754 cpqhp_pushbutton_thread(pushbutton_pending);
1756 for (ctrl = cpqhp_ctrl_list; ctrl; ctrl=ctrl->next)
1757 interrupt_event_handler(ctrl);
1759 dbg("event_thread signals exit\n");
1763 int cpqhp_event_start_thread(void)
1765 cpqhp_event_thread = kthread_run(event_thread, NULL, "phpd_event");
1766 if (IS_ERR(cpqhp_event_thread)) {
1767 err ("Can't start up our event thread\n");
1768 return PTR_ERR(cpqhp_event_thread);
1775 void cpqhp_event_stop_thread(void)
1777 kthread_stop(cpqhp_event_thread);
1781 static int update_slot_info(struct controller *ctrl, struct slot *slot)
1783 struct hotplug_slot_info *info;
1786 info = kmalloc(sizeof(*info), GFP_KERNEL);
1790 info->power_status = get_slot_enabled(ctrl, slot);
1791 info->attention_status = cpq_get_attention_status(ctrl, slot);
1792 info->latch_status = cpq_get_latch_status(ctrl, slot);
1793 info->adapter_status = get_presence_status(ctrl, slot);
1794 result = pci_hp_change_slot_info(slot->hotplug_slot, info);
1799 static void interrupt_event_handler(struct controller *ctrl)
1803 struct pci_func *func;
1805 struct slot *p_slot;
1810 for (loop = 0; loop < 10; loop++) {
1811 /* dbg("loop %d\n", loop); */
1812 if (ctrl->event_queue[loop].event_type != 0) {
1813 hp_slot = ctrl->event_queue[loop].hp_slot;
1815 func = cpqhp_slot_find(ctrl->bus, (hp_slot + ctrl->slot_device_offset), 0);
1819 p_slot = cpqhp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
1823 dbg("hp_slot %d, func %p, p_slot %p\n",
1824 hp_slot, func, p_slot);
1826 if (ctrl->event_queue[loop].event_type == INT_BUTTON_PRESS) {
1827 dbg("button pressed\n");
1828 } else if (ctrl->event_queue[loop].event_type ==
1829 INT_BUTTON_CANCEL) {
1830 dbg("button cancel\n");
1831 del_timer(&p_slot->task_event);
1833 mutex_lock(&ctrl->crit_sect);
1835 if (p_slot->state == BLINKINGOFF_STATE) {
1837 dbg("turn on green LED\n");
1838 green_LED_on (ctrl, hp_slot);
1839 } else if (p_slot->state == BLINKINGON_STATE) {
1841 dbg("turn off green LED\n");
1842 green_LED_off (ctrl, hp_slot);
1845 info(msg_button_cancel, p_slot->number);
1847 p_slot->state = STATIC_STATE;
1849 amber_LED_off (ctrl, hp_slot);
1853 /* Wait for SOBS to be unset */
1854 wait_for_ctrl_irq (ctrl);
1856 mutex_unlock(&ctrl->crit_sect);
1858 /*** button Released (No action on press...) */
1859 else if (ctrl->event_queue[loop].event_type == INT_BUTTON_RELEASE) {
1860 dbg("button release\n");
1862 if (is_slot_enabled (ctrl, hp_slot)) {
1863 dbg("slot is on\n");
1864 p_slot->state = BLINKINGOFF_STATE;
1865 info(msg_button_off, p_slot->number);
1867 dbg("slot is off\n");
1868 p_slot->state = BLINKINGON_STATE;
1869 info(msg_button_on, p_slot->number);
1871 mutex_lock(&ctrl->crit_sect);
1873 dbg("blink green LED and turn off amber\n");
1875 amber_LED_off (ctrl, hp_slot);
1876 green_LED_blink (ctrl, hp_slot);
1880 /* Wait for SOBS to be unset */
1881 wait_for_ctrl_irq (ctrl);
1883 mutex_unlock(&ctrl->crit_sect);
1884 init_timer(&p_slot->task_event);
1885 p_slot->hp_slot = hp_slot;
1886 p_slot->ctrl = ctrl;
1887 /* p_slot->physical_slot = physical_slot; */
1888 p_slot->task_event.expires = jiffies + 5 * HZ; /* 5 second delay */
1889 p_slot->task_event.function = pushbutton_helper_thread;
1890 p_slot->task_event.data = (u32) p_slot;
1892 dbg("add_timer p_slot = %p\n", p_slot);
1893 add_timer(&p_slot->task_event);
1895 /***********POWER FAULT */
1896 else if (ctrl->event_queue[loop].event_type == INT_POWER_FAULT) {
1897 dbg("power fault\n");
1899 /* refresh notification */
1901 update_slot_info(ctrl, p_slot);
1904 ctrl->event_queue[loop].event_type = 0;
1908 } /* End of FOR loop */
1916 * cpqhp_pushbutton_thread - handle pushbutton events
1917 * @slot: target slot (struct)
1919 * Scheduled procedure to handle blocking stuff for the pushbuttons.
1920 * Handles all pending events and exits.
1922 void cpqhp_pushbutton_thread(unsigned long slot)
1926 struct pci_func *func;
1927 struct slot *p_slot = (struct slot *) slot;
1928 struct controller *ctrl = (struct controller *) p_slot->ctrl;
1930 pushbutton_pending = 0;
1931 hp_slot = p_slot->hp_slot;
1933 device = p_slot->device;
1935 if (is_slot_enabled(ctrl, hp_slot)) {
1936 p_slot->state = POWEROFF_STATE;
1937 /* power Down board */
1938 func = cpqhp_slot_find(p_slot->bus, p_slot->device, 0);
1939 dbg("In power_down_board, func = %p, ctrl = %p\n", func, ctrl);
1941 dbg("Error! func NULL in %s\n", __func__);
1945 if (cpqhp_process_SS(ctrl, func) != 0) {
1946 amber_LED_on(ctrl, hp_slot);
1947 green_LED_on(ctrl, hp_slot);
1951 /* Wait for SOBS to be unset */
1952 wait_for_ctrl_irq(ctrl);
1955 p_slot->state = STATIC_STATE;
1957 p_slot->state = POWERON_STATE;
1960 func = cpqhp_slot_find(p_slot->bus, p_slot->device, 0);
1961 dbg("In add_board, func = %p, ctrl = %p\n", func, ctrl);
1963 dbg("Error! func NULL in %s\n", __func__);
1968 if (cpqhp_process_SI(ctrl, func) != 0) {
1969 amber_LED_on(ctrl, hp_slot);
1970 green_LED_off(ctrl, hp_slot);
1974 /* Wait for SOBS to be unset */
1975 wait_for_ctrl_irq (ctrl);
1979 p_slot->state = STATIC_STATE;
1986 int cpqhp_process_SI(struct controller *ctrl, struct pci_func *func)
1992 struct slot* p_slot;
1993 int physical_slot = 0;
1997 device = func->device;
1998 hp_slot = device - ctrl->slot_device_offset;
1999 p_slot = cpqhp_find_slot(ctrl, device);
2001 physical_slot = p_slot->number;
2003 /* Check to see if the interlock is closed */
2004 tempdword = readl(ctrl->hpc_reg + INT_INPUT_CLEAR);
2006 if (tempdword & (0x01 << hp_slot)) {
2010 if (func->is_a_board) {
2011 rc = board_replaced(func, ctrl);
2016 func = cpqhp_slot_create(ctrl->bus);
2020 func->bus = ctrl->bus;
2021 func->device = device;
2023 func->configured = 0;
2024 func->is_a_board = 1;
2026 /* We have to save the presence info for these slots */
2027 temp_word = ctrl->ctrl_int_comp >> 16;
2028 func->presence_save = (temp_word >> hp_slot) & 0x01;
2029 func->presence_save |= (temp_word >> (hp_slot + 7)) & 0x02;
2031 if (ctrl->ctrl_int_comp & (0x1L << hp_slot)) {
2032 func->switch_save = 0;
2034 func->switch_save = 0x10;
2037 rc = board_added(func, ctrl);
2039 if (is_bridge(func)) {
2040 bridge_slot_remove(func);
2044 /* Setup slot structure with entry for empty slot */
2045 func = cpqhp_slot_create(ctrl->bus);
2050 func->bus = ctrl->bus;
2051 func->device = device;
2053 func->configured = 0;
2054 func->is_a_board = 0;
2056 /* We have to save the presence info for these slots */
2057 temp_word = ctrl->ctrl_int_comp >> 16;
2058 func->presence_save = (temp_word >> hp_slot) & 0x01;
2059 func->presence_save |=
2060 (temp_word >> (hp_slot + 7)) & 0x02;
2062 if (ctrl->ctrl_int_comp & (0x1L << hp_slot)) {
2063 func->switch_save = 0;
2065 func->switch_save = 0x10;
2071 dbg("%s: rc = %d\n", __func__, rc);
2075 update_slot_info(ctrl, p_slot);
2081 int cpqhp_process_SS(struct controller *ctrl, struct pci_func *func)
2083 u8 device, class_code, header_type, BCR;
2088 struct slot* p_slot;
2089 struct pci_bus *pci_bus = ctrl->pci_bus;
2090 int physical_slot=0;
2092 device = func->device;
2093 func = cpqhp_slot_find(ctrl->bus, device, index++);
2094 p_slot = cpqhp_find_slot(ctrl, device);
2096 physical_slot = p_slot->number;
2099 /* Make sure there are no video controllers here */
2100 while (func && !rc) {
2101 pci_bus->number = func->bus;
2102 devfn = PCI_DEVFN(func->device, func->function);
2104 /* Check the Class Code */
2105 rc = pci_bus_read_config_byte (pci_bus, devfn, 0x0B, &class_code);
2109 if (class_code == PCI_BASE_CLASS_DISPLAY) {
2110 /* Display/Video adapter (not supported) */
2111 rc = REMOVE_NOT_SUPPORTED;
2113 /* See if it's a bridge */
2114 rc = pci_bus_read_config_byte (pci_bus, devfn, PCI_HEADER_TYPE, &header_type);
2118 /* If it's a bridge, check the VGA Enable bit */
2119 if ((header_type & 0x7F) == PCI_HEADER_TYPE_BRIDGE) {
2120 rc = pci_bus_read_config_byte (pci_bus, devfn, PCI_BRIDGE_CONTROL, &BCR);
2124 /* If the VGA Enable bit is set, remove isn't
2126 if (BCR & PCI_BRIDGE_CTL_VGA)
2127 rc = REMOVE_NOT_SUPPORTED;
2131 func = cpqhp_slot_find(ctrl->bus, device, index++);
2134 func = cpqhp_slot_find(ctrl->bus, device, 0);
2135 if ((func != NULL) && !rc) {
2136 /* FIXME: Replace flag should be passed into process_SS */
2137 replace_flag = !(ctrl->add_support);
2138 rc = remove_board(func, replace_flag, ctrl);
2144 update_slot_info(ctrl, p_slot);
2150 * switch_leds - switch the leds, go from one site to the other.
2151 * @ctrl: controller to use
2152 * @num_of_slots: number of slots to use
2153 * @work_LED: LED control value
2154 * @direction: 1 to start from the left side, 0 to start right.
2156 static void switch_leds(struct controller *ctrl, const int num_of_slots,
2157 u32 *work_LED, const int direction)
2161 for (loop = 0; loop < num_of_slots; loop++) {
2163 *work_LED = *work_LED >> 1;
2165 *work_LED = *work_LED << 1;
2166 writel(*work_LED, ctrl->hpc_reg + LED_CONTROL);
2170 /* Wait for SOGO interrupt */
2171 wait_for_ctrl_irq(ctrl);
2173 /* Get ready for next iteration */
2174 long_delay((2*HZ)/10);
2179 * cpqhp_hardware_test - runs hardware tests
2180 * @ctrl: target controller
2181 * @test_num: the number written to the "test" file in sysfs.
2183 * For hot plug ctrl folks to play with.
2185 int cpqhp_hardware_test(struct controller *ctrl, int test_num)
2192 num_of_slots = readb(ctrl->hpc_reg + SLOT_MASK) & 0x0f;
2196 /* Do stuff here! */
2198 /* Do that funky LED thing */
2199 /* so we can restore them later */
2200 save_LED = readl(ctrl->hpc_reg + LED_CONTROL);
2201 work_LED = 0x01010101;
2202 switch_leds(ctrl, num_of_slots, &work_LED, 0);
2203 switch_leds(ctrl, num_of_slots, &work_LED, 1);
2204 switch_leds(ctrl, num_of_slots, &work_LED, 0);
2205 switch_leds(ctrl, num_of_slots, &work_LED, 1);
2207 work_LED = 0x01010000;
2208 writel(work_LED, ctrl->hpc_reg + LED_CONTROL);
2209 switch_leds(ctrl, num_of_slots, &work_LED, 0);
2210 switch_leds(ctrl, num_of_slots, &work_LED, 1);
2211 work_LED = 0x00000101;
2212 writel(work_LED, ctrl->hpc_reg + LED_CONTROL);
2213 switch_leds(ctrl, num_of_slots, &work_LED, 0);
2214 switch_leds(ctrl, num_of_slots, &work_LED, 1);
2216 work_LED = 0x01010000;
2217 writel(work_LED, ctrl->hpc_reg + LED_CONTROL);
2218 for (loop = 0; loop < num_of_slots; loop++) {
2221 /* Wait for SOGO interrupt */
2222 wait_for_ctrl_irq (ctrl);
2224 /* Get ready for next iteration */
2225 long_delay((3*HZ)/10);
2226 work_LED = work_LED >> 16;
2227 writel(work_LED, ctrl->hpc_reg + LED_CONTROL);
2231 /* Wait for SOGO interrupt */
2232 wait_for_ctrl_irq (ctrl);
2234 /* Get ready for next iteration */
2235 long_delay((3*HZ)/10);
2236 work_LED = work_LED << 16;
2237 writel(work_LED, ctrl->hpc_reg + LED_CONTROL);
2238 work_LED = work_LED << 1;
2239 writel(work_LED, ctrl->hpc_reg + LED_CONTROL);
2242 /* put it back the way it was */
2243 writel(save_LED, ctrl->hpc_reg + LED_CONTROL);
2247 /* Wait for SOBS to be unset */
2248 wait_for_ctrl_irq (ctrl);
2251 /* Do other stuff here! */
2262 * configure_new_device - Configures the PCI header information of one board.
2263 * @ctrl: pointer to controller structure
2264 * @func: pointer to function structure
2265 * @behind_bridge: 1 if this is a recursive call, 0 if not
2266 * @resources: pointer to set of resource lists
2268 * Returns 0 if success.
2270 static u32 configure_new_device(struct controller * ctrl, struct pci_func * func,
2271 u8 behind_bridge, struct resource_lists * resources)
2273 u8 temp_byte, function, max_functions, stop_it;
2276 struct pci_func *new_slot;
2281 dbg("%s\n", __func__);
2282 /* Check for Multi-function device */
2283 ctrl->pci_bus->number = func->bus;
2284 rc = pci_bus_read_config_byte (ctrl->pci_bus, PCI_DEVFN(func->device, func->function), 0x0E, &temp_byte);
2286 dbg("%s: rc = %d\n", __func__, rc);
2290 if (temp_byte & 0x80) /* Multi-function device */
2298 rc = configure_new_function(ctrl, new_slot, behind_bridge, resources);
2301 dbg("configure_new_function failed %d\n",rc);
2305 new_slot = cpqhp_slot_find(new_slot->bus, new_slot->device, index++);
2308 cpqhp_return_board_resources(new_slot, resources);
2318 /* The following loop skips to the next present function
2319 * and creates a board structure */
2321 while ((function < max_functions) && (!stop_it)) {
2322 pci_bus_read_config_dword (ctrl->pci_bus, PCI_DEVFN(func->device, function), 0x00, &ID);
2324 if (ID == 0xFFFFFFFF) {
2327 /* Setup slot structure. */
2328 new_slot = cpqhp_slot_create(func->bus);
2330 if (new_slot == NULL)
2333 new_slot->bus = func->bus;
2334 new_slot->device = func->device;
2335 new_slot->function = function;
2336 new_slot->is_a_board = 1;
2337 new_slot->status = 0;
2343 } while (function < max_functions);
2344 dbg("returning from configure_new_device\n");
2351 * Configuration logic that involves the hotplug data structures and
2357 * configure_new_function - Configures the PCI header information of one device
2358 * @ctrl: pointer to controller structure
2359 * @func: pointer to function structure
2360 * @behind_bridge: 1 if this is a recursive call, 0 if not
2361 * @resources: pointer to set of resource lists
2363 * Calls itself recursively for bridged devices.
2364 * Returns 0 if success.
2366 static int configure_new_function(struct controller *ctrl, struct pci_func *func,
2368 struct resource_lists *resources)
2383 struct pci_resource *mem_node;
2384 struct pci_resource *p_mem_node;
2385 struct pci_resource *io_node;
2386 struct pci_resource *bus_node;
2387 struct pci_resource *hold_mem_node;
2388 struct pci_resource *hold_p_mem_node;
2389 struct pci_resource *hold_IO_node;
2390 struct pci_resource *hold_bus_node;
2391 struct irq_mapping irqs;
2392 struct pci_func *new_slot;
2393 struct pci_bus *pci_bus;
2394 struct resource_lists temp_resources;
2396 pci_bus = ctrl->pci_bus;
2397 pci_bus->number = func->bus;
2398 devfn = PCI_DEVFN(func->device, func->function);
2400 /* Check for Bridge */
2401 rc = pci_bus_read_config_byte(pci_bus, devfn, PCI_HEADER_TYPE, &temp_byte);
2405 if ((temp_byte & 0x7F) == PCI_HEADER_TYPE_BRIDGE) {
2406 /* set Primary bus */
2407 dbg("set Primary bus = %d\n", func->bus);
2408 rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_PRIMARY_BUS, func->bus);
2412 /* find range of busses to use */
2413 dbg("find ranges of buses to use\n");
2414 bus_node = get_max_resource(&(resources->bus_head), 1);
2416 /* If we don't have any busses to allocate, we can't continue */
2420 /* set Secondary bus */
2421 temp_byte = bus_node->base;
2422 dbg("set Secondary bus = %d\n", bus_node->base);
2423 rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_SECONDARY_BUS, temp_byte);
2427 /* set subordinate bus */
2428 temp_byte = bus_node->base + bus_node->length - 1;
2429 dbg("set subordinate bus = %d\n", bus_node->base + bus_node->length - 1);
2430 rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_SUBORDINATE_BUS, temp_byte);
2434 /* set subordinate Latency Timer and base Latency Timer */
2436 rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_SEC_LATENCY_TIMER, temp_byte);
2439 rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_LATENCY_TIMER, temp_byte);
2443 /* set Cache Line size */
2445 rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_CACHE_LINE_SIZE, temp_byte);
2449 /* Setup the IO, memory, and prefetchable windows */
2450 io_node = get_max_resource(&(resources->io_head), 0x1000);
2453 mem_node = get_max_resource(&(resources->mem_head), 0x100000);
2456 p_mem_node = get_max_resource(&(resources->p_mem_head), 0x100000);
2459 dbg("Setup the IO, memory, and prefetchable windows\n");
2461 dbg("(base, len, next) (%x, %x, %p)\n", io_node->base,
2462 io_node->length, io_node->next);
2464 dbg("(base, len, next) (%x, %x, %p)\n", mem_node->base,
2465 mem_node->length, mem_node->next);
2466 dbg("p_mem_node\n");
2467 dbg("(base, len, next) (%x, %x, %p)\n", p_mem_node->base,
2468 p_mem_node->length, p_mem_node->next);
2470 /* set up the IRQ info */
2471 if (!resources->irqs) {
2472 irqs.barber_pole = 0;
2473 irqs.interrupt[0] = 0;
2474 irqs.interrupt[1] = 0;
2475 irqs.interrupt[2] = 0;
2476 irqs.interrupt[3] = 0;
2479 irqs.barber_pole = resources->irqs->barber_pole;
2480 irqs.interrupt[0] = resources->irqs->interrupt[0];
2481 irqs.interrupt[1] = resources->irqs->interrupt[1];
2482 irqs.interrupt[2] = resources->irqs->interrupt[2];
2483 irqs.interrupt[3] = resources->irqs->interrupt[3];
2484 irqs.valid_INT = resources->irqs->valid_INT;
2487 /* set up resource lists that are now aligned on top and bottom
2488 * for anything behind the bridge. */
2489 temp_resources.bus_head = bus_node;
2490 temp_resources.io_head = io_node;
2491 temp_resources.mem_head = mem_node;
2492 temp_resources.p_mem_head = p_mem_node;
2493 temp_resources.irqs = &irqs;
2495 /* Make copies of the nodes we are going to pass down so that
2496 * if there is a problem,we can just use these to free resources
2498 hold_bus_node = kmalloc(sizeof(*hold_bus_node), GFP_KERNEL);
2499 hold_IO_node = kmalloc(sizeof(*hold_IO_node), GFP_KERNEL);
2500 hold_mem_node = kmalloc(sizeof(*hold_mem_node), GFP_KERNEL);
2501 hold_p_mem_node = kmalloc(sizeof(*hold_p_mem_node), GFP_KERNEL);
2503 if (!hold_bus_node || !hold_IO_node || !hold_mem_node || !hold_p_mem_node) {
2504 kfree(hold_bus_node);
2505 kfree(hold_IO_node);
2506 kfree(hold_mem_node);
2507 kfree(hold_p_mem_node);
2512 memcpy(hold_bus_node, bus_node, sizeof(struct pci_resource));
2514 bus_node->base += 1;
2515 bus_node->length -= 1;
2516 bus_node->next = NULL;
2518 /* If we have IO resources copy them and fill in the bridge's
2519 * IO range registers */
2521 memcpy(hold_IO_node, io_node, sizeof(struct pci_resource));
2522 io_node->next = NULL;
2524 /* set IO base and Limit registers */
2525 temp_byte = io_node->base >> 8;
2526 rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_IO_BASE, temp_byte);
2528 temp_byte = (io_node->base + io_node->length - 1) >> 8;
2529 rc = pci_bus_write_config_byte(pci_bus, devfn, PCI_IO_LIMIT, temp_byte);
2531 kfree(hold_IO_node);
2532 hold_IO_node = NULL;
2535 /* If we have memory resources copy them and fill in the
2536 * bridge's memory range registers. Otherwise, fill in the
2537 * range registers with values that disable them. */
2539 memcpy(hold_mem_node, mem_node, sizeof(struct pci_resource));
2540 mem_node->next = NULL;
2542 /* set Mem base and Limit registers */
2543 temp_word = mem_node->base >> 16;
2544 rc = pci_bus_write_config_word(pci_bus, devfn, PCI_MEMORY_BASE, temp_word);
2546 temp_word = (mem_node->base + mem_node->length - 1) >> 16;
2547 rc = pci_bus_write_config_word(pci_bus, devfn, PCI_MEMORY_LIMIT, temp_word);
2550 rc = pci_bus_write_config_word(pci_bus, devfn, PCI_MEMORY_BASE, temp_word);
2553 rc = pci_bus_write_config_word(pci_bus, devfn, PCI_MEMORY_LIMIT, temp_word);
2555 kfree(hold_mem_node);
2556 hold_mem_node = NULL;
2559 memcpy(hold_p_mem_node, p_mem_node, sizeof(struct pci_resource));
2560 p_mem_node->next = NULL;
2562 /* set Pre Mem base and Limit registers */
2563 temp_word = p_mem_node->base >> 16;
2564 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_PREF_MEMORY_BASE, temp_word);
2566 temp_word = (p_mem_node->base + p_mem_node->length - 1) >> 16;
2567 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_PREF_MEMORY_LIMIT, temp_word);
2569 /* Adjust this to compensate for extra adjustment in first loop
2575 /* Here we actually find the devices and configure them */
2576 for (device = 0; (device <= 0x1F) && !rc; device++) {
2577 irqs.barber_pole = (irqs.barber_pole + 1) & 0x03;
2580 pci_bus->number = hold_bus_node->base;
2581 pci_bus_read_config_dword (pci_bus, PCI_DEVFN(device, 0), 0x00, &ID);
2582 pci_bus->number = func->bus;
2584 if (ID != 0xFFFFFFFF) { /* device present */
2585 /* Setup slot structure. */
2586 new_slot = cpqhp_slot_create(hold_bus_node->base);
2588 if (new_slot == NULL) {
2593 new_slot->bus = hold_bus_node->base;
2594 new_slot->device = device;
2595 new_slot->function = 0;
2596 new_slot->is_a_board = 1;
2597 new_slot->status = 0;
2599 rc = configure_new_device(ctrl, new_slot, 1, &temp_resources);
2600 dbg("configure_new_device rc=0x%x\n",rc);
2601 } /* End of IF (device in slot?) */
2602 } /* End of FOR loop */
2606 /* save the interrupt routing information */
2607 if (resources->irqs) {
2608 resources->irqs->interrupt[0] = irqs.interrupt[0];
2609 resources->irqs->interrupt[1] = irqs.interrupt[1];
2610 resources->irqs->interrupt[2] = irqs.interrupt[2];
2611 resources->irqs->interrupt[3] = irqs.interrupt[3];
2612 resources->irqs->valid_INT = irqs.valid_INT;
2613 } else if (!behind_bridge) {
2614 /* We need to hook up the interrupts here */
2615 for (cloop = 0; cloop < 4; cloop++) {
2616 if (irqs.valid_INT & (0x01 << cloop)) {
2617 rc = cpqhp_set_irq(func->bus, func->device,
2618 cloop + 1, irqs.interrupt[cloop]);
2622 } /* end of for loop */
2624 /* Return unused bus resources
2625 * First use the temporary node to store information for
2627 if (hold_bus_node && bus_node && temp_resources.bus_head) {
2628 hold_bus_node->length = bus_node->base - hold_bus_node->base;
2630 hold_bus_node->next = func->bus_head;
2631 func->bus_head = hold_bus_node;
2633 temp_byte = temp_resources.bus_head->base - 1;
2635 /* set subordinate bus */
2636 rc = pci_bus_write_config_byte (pci_bus, devfn, PCI_SUBORDINATE_BUS, temp_byte);
2638 if (temp_resources.bus_head->length == 0) {
2639 kfree(temp_resources.bus_head);
2640 temp_resources.bus_head = NULL;
2642 return_resource(&(resources->bus_head), temp_resources.bus_head);
2646 /* If we have IO space available and there is some left,
2647 * return the unused portion */
2648 if (hold_IO_node && temp_resources.io_head) {
2649 io_node = do_pre_bridge_resource_split(&(temp_resources.io_head),
2650 &hold_IO_node, 0x1000);
2652 /* Check if we were able to split something off */
2654 hold_IO_node->base = io_node->base + io_node->length;
2656 temp_byte = (hold_IO_node->base) >> 8;
2657 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_IO_BASE, temp_byte);
2659 return_resource(&(resources->io_head), io_node);
2662 io_node = do_bridge_resource_split(&(temp_resources.io_head), 0x1000);
2664 /* Check if we were able to split something off */
2666 /* First use the temporary node to store
2667 * information for the board */
2668 hold_IO_node->length = io_node->base - hold_IO_node->base;
2670 /* If we used any, add it to the board's list */
2671 if (hold_IO_node->length) {
2672 hold_IO_node->next = func->io_head;
2673 func->io_head = hold_IO_node;
2675 temp_byte = (io_node->base - 1) >> 8;
2676 rc = pci_bus_write_config_byte (pci_bus, devfn, PCI_IO_LIMIT, temp_byte);
2678 return_resource(&(resources->io_head), io_node);
2680 /* it doesn't need any IO */
2682 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_IO_LIMIT, temp_word);
2684 return_resource(&(resources->io_head), io_node);
2685 kfree(hold_IO_node);
2688 /* it used most of the range */
2689 hold_IO_node->next = func->io_head;
2690 func->io_head = hold_IO_node;
2692 } else if (hold_IO_node) {
2693 /* it used the whole range */
2694 hold_IO_node->next = func->io_head;
2695 func->io_head = hold_IO_node;
2697 /* If we have memory space available and there is some left,
2698 * return the unused portion */
2699 if (hold_mem_node && temp_resources.mem_head) {
2700 mem_node = do_pre_bridge_resource_split(&(temp_resources. mem_head),
2701 &hold_mem_node, 0x100000);
2703 /* Check if we were able to split something off */
2705 hold_mem_node->base = mem_node->base + mem_node->length;
2707 temp_word = (hold_mem_node->base) >> 16;
2708 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_MEMORY_BASE, temp_word);
2710 return_resource(&(resources->mem_head), mem_node);
2713 mem_node = do_bridge_resource_split(&(temp_resources.mem_head), 0x100000);
2715 /* Check if we were able to split something off */
2717 /* First use the temporary node to store
2718 * information for the board */
2719 hold_mem_node->length = mem_node->base - hold_mem_node->base;
2721 if (hold_mem_node->length) {
2722 hold_mem_node->next = func->mem_head;
2723 func->mem_head = hold_mem_node;
2725 /* configure end address */
2726 temp_word = (mem_node->base - 1) >> 16;
2727 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_MEMORY_LIMIT, temp_word);
2729 /* Return unused resources to the pool */
2730 return_resource(&(resources->mem_head), mem_node);
2732 /* it doesn't need any Mem */
2734 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_MEMORY_LIMIT, temp_word);
2736 return_resource(&(resources->mem_head), mem_node);
2737 kfree(hold_mem_node);
2740 /* it used most of the range */
2741 hold_mem_node->next = func->mem_head;
2742 func->mem_head = hold_mem_node;
2744 } else if (hold_mem_node) {
2745 /* it used the whole range */
2746 hold_mem_node->next = func->mem_head;
2747 func->mem_head = hold_mem_node;
2749 /* If we have prefetchable memory space available and there
2750 * is some left at the end, return the unused portion */
2751 if (hold_p_mem_node && temp_resources.p_mem_head) {
2752 p_mem_node = do_pre_bridge_resource_split(&(temp_resources.p_mem_head),
2753 &hold_p_mem_node, 0x100000);
2755 /* Check if we were able to split something off */
2757 hold_p_mem_node->base = p_mem_node->base + p_mem_node->length;
2759 temp_word = (hold_p_mem_node->base) >> 16;
2760 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_PREF_MEMORY_BASE, temp_word);
2762 return_resource(&(resources->p_mem_head), p_mem_node);
2765 p_mem_node = do_bridge_resource_split(&(temp_resources.p_mem_head), 0x100000);
2767 /* Check if we were able to split something off */
2769 /* First use the temporary node to store
2770 * information for the board */
2771 hold_p_mem_node->length = p_mem_node->base - hold_p_mem_node->base;
2773 /* If we used any, add it to the board's list */
2774 if (hold_p_mem_node->length) {
2775 hold_p_mem_node->next = func->p_mem_head;
2776 func->p_mem_head = hold_p_mem_node;
2778 temp_word = (p_mem_node->base - 1) >> 16;
2779 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_PREF_MEMORY_LIMIT, temp_word);
2781 return_resource(&(resources->p_mem_head), p_mem_node);
2783 /* it doesn't need any PMem */
2785 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_PREF_MEMORY_LIMIT, temp_word);
2787 return_resource(&(resources->p_mem_head), p_mem_node);
2788 kfree(hold_p_mem_node);
2791 /* it used the most of the range */
2792 hold_p_mem_node->next = func->p_mem_head;
2793 func->p_mem_head = hold_p_mem_node;
2795 } else if (hold_p_mem_node) {
2796 /* it used the whole range */
2797 hold_p_mem_node->next = func->p_mem_head;
2798 func->p_mem_head = hold_p_mem_node;
2800 /* We should be configuring an IRQ and the bridge's base address
2801 * registers if it needs them. Although we have never seen such
2805 command = 0x0157; /* = PCI_COMMAND_IO |
2806 * PCI_COMMAND_MEMORY |
2807 * PCI_COMMAND_MASTER |
2808 * PCI_COMMAND_INVALIDATE |
2809 * PCI_COMMAND_PARITY |
2810 * PCI_COMMAND_SERR */
2811 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_COMMAND, command);
2813 /* set Bridge Control Register */
2814 command = 0x07; /* = PCI_BRIDGE_CTL_PARITY |
2815 * PCI_BRIDGE_CTL_SERR |
2816 * PCI_BRIDGE_CTL_NO_ISA */
2817 rc = pci_bus_write_config_word (pci_bus, devfn, PCI_BRIDGE_CONTROL, command);
2818 } else if ((temp_byte & 0x7F) == PCI_HEADER_TYPE_NORMAL) {
2819 /* Standard device */
2820 rc = pci_bus_read_config_byte (pci_bus, devfn, 0x0B, &class_code);
2822 if (class_code == PCI_BASE_CLASS_DISPLAY) {
2823 /* Display (video) adapter (not supported) */
2824 return DEVICE_TYPE_NOT_SUPPORTED;
2826 /* Figure out IO and memory needs */
2827 for (cloop = 0x10; cloop <= 0x24; cloop += 4) {
2828 temp_register = 0xFFFFFFFF;
2830 dbg("CND: bus=%d, devfn=%d, offset=%d\n", pci_bus->number, devfn, cloop);
2831 rc = pci_bus_write_config_dword (pci_bus, devfn, cloop, temp_register);
2833 rc = pci_bus_read_config_dword (pci_bus, devfn, cloop, &temp_register);
2834 dbg("CND: base = 0x%x\n", temp_register);
2836 if (temp_register) { /* If this register is implemented */
2837 if ((temp_register & 0x03L) == 0x01) {
2840 /* set base = amount of IO space */
2841 base = temp_register & 0xFFFFFFFC;
2844 dbg("CND: length = 0x%x\n", base);
2845 io_node = get_io_resource(&(resources->io_head), base);
2846 dbg("Got io_node start = %8.8x, length = %8.8x next (%p)\n",
2847 io_node->base, io_node->length, io_node->next);
2848 dbg("func (%p) io_head (%p)\n", func, func->io_head);
2850 /* allocate the resource to the board */
2852 base = io_node->base;
2854 io_node->next = func->io_head;
2855 func->io_head = io_node;
2858 } else if ((temp_register & 0x0BL) == 0x08) {
2859 /* Map prefetchable memory */
2860 base = temp_register & 0xFFFFFFF0;
2863 dbg("CND: length = 0x%x\n", base);
2864 p_mem_node = get_resource(&(resources->p_mem_head), base);
2866 /* allocate the resource to the board */
2868 base = p_mem_node->base;
2870 p_mem_node->next = func->p_mem_head;
2871 func->p_mem_head = p_mem_node;
2874 } else if ((temp_register & 0x0BL) == 0x00) {
2876 base = temp_register & 0xFFFFFFF0;
2879 dbg("CND: length = 0x%x\n", base);
2880 mem_node = get_resource(&(resources->mem_head), base);
2882 /* allocate the resource to the board */
2884 base = mem_node->base;
2886 mem_node->next = func->mem_head;
2887 func->mem_head = mem_node;
2890 } else if ((temp_register & 0x0BL) == 0x04) {
2892 base = temp_register & 0xFFFFFFF0;
2895 dbg("CND: length = 0x%x\n", base);
2896 mem_node = get_resource(&(resources->mem_head), base);
2898 /* allocate the resource to the board */
2900 base = mem_node->base;
2902 mem_node->next = func->mem_head;
2903 func->mem_head = mem_node;
2906 } else if ((temp_register & 0x0BL) == 0x06) {
2907 /* Those bits are reserved, we can't handle this */
2910 /* Requesting space below 1M */
2911 return NOT_ENOUGH_RESOURCES;
2914 rc = pci_bus_write_config_dword(pci_bus, devfn, cloop, base);
2916 /* Check for 64-bit base */
2917 if ((temp_register & 0x07L) == 0x04) {
2920 /* Upper 32 bits of address always zero
2921 * on today's systems */
2922 /* FIXME this is probably not true on
2923 * Alpha and ia64??? */
2925 rc = pci_bus_write_config_dword(pci_bus, devfn, cloop, base);
2928 } /* End of base register loop */
2929 if (cpqhp_legacy_mode) {
2930 /* Figure out which interrupt pin this function uses */
2931 rc = pci_bus_read_config_byte (pci_bus, devfn,
2932 PCI_INTERRUPT_PIN, &temp_byte);
2934 /* If this function needs an interrupt and we are behind
2935 * a bridge and the pin is tied to something that's
2936 * alread mapped, set this one the same */
2937 if (temp_byte && resources->irqs &&
2938 (resources->irqs->valid_INT &
2939 (0x01 << ((temp_byte + resources->irqs->barber_pole - 1) & 0x03)))) {
2940 /* We have to share with something already set up */
2941 IRQ = resources->irqs->interrupt[(temp_byte +
2942 resources->irqs->barber_pole - 1) & 0x03];
2944 /* Program IRQ based on card type */
2945 rc = pci_bus_read_config_byte (pci_bus, devfn, 0x0B, &class_code);
2947 if (class_code == PCI_BASE_CLASS_STORAGE)
2948 IRQ = cpqhp_disk_irq;
2950 IRQ = cpqhp_nic_irq;
2954 rc = pci_bus_write_config_byte (pci_bus, devfn, PCI_INTERRUPT_LINE, IRQ);
2957 if (!behind_bridge) {
2958 rc = cpqhp_set_irq(func->bus, func->device, temp_byte, IRQ);
2962 /* TBD - this code may also belong in the other clause
2963 * of this If statement */
2964 resources->irqs->interrupt[(temp_byte + resources->irqs->barber_pole - 1) & 0x03] = IRQ;
2965 resources->irqs->valid_INT |= 0x01 << (temp_byte + resources->irqs->barber_pole - 1) & 0x03;
2970 rc = pci_bus_write_config_byte(pci_bus, devfn,
2971 PCI_LATENCY_TIMER, temp_byte);
2973 /* Cache Line size */
2975 rc = pci_bus_write_config_byte(pci_bus, devfn,
2976 PCI_CACHE_LINE_SIZE, temp_byte);
2978 /* disable ROM base Address */
2980 rc = pci_bus_write_config_word(pci_bus, devfn,
2981 PCI_ROM_ADDRESS, temp_dword);
2984 temp_word = 0x0157; /* = PCI_COMMAND_IO |
2985 * PCI_COMMAND_MEMORY |
2986 * PCI_COMMAND_MASTER |
2987 * PCI_COMMAND_INVALIDATE |
2988 * PCI_COMMAND_PARITY |
2989 * PCI_COMMAND_SERR */
2990 rc = pci_bus_write_config_word (pci_bus, devfn,
2991 PCI_COMMAND, temp_word);
2992 } else { /* End of Not-A-Bridge else */
2993 /* It's some strange type of PCI adapter (Cardbus?) */
2994 return DEVICE_TYPE_NOT_SUPPORTED;
2997 func->configured = 1;
3001 cpqhp_destroy_resource_list (&temp_resources);
3003 return_resource(&(resources-> bus_head), hold_bus_node);
3004 return_resource(&(resources-> io_head), hold_IO_node);
3005 return_resource(&(resources-> mem_head), hold_mem_node);
3006 return_resource(&(resources-> p_mem_head), hold_p_mem_node);