drivers/pci/hotplug/pciehp_ctrl.c

   1 /*
   2  * PCI Express Hot Plug Controller Driver
   3  *
   4  * Copyright (C) 1995,2001 Compaq Computer Corporation
   5  * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com)
   6  * Copyright (C) 2001 IBM Corp.
   7  * Copyright (C) 2003-2004 Intel Corporation
   8  *
   9  * All rights reserved.
  10  *
  11  * This program is free software; you can redistribute it and/or modify
  12  * it under the terms of the GNU General Public License as published by
  13  * the Free Software Foundation; either version 2 of the License, or (at
  14  * your option) any later version.
  15  *
  16  * This program is distributed in the hope that it will be useful, but
  17  * WITHOUT ANY WARRANTY; without even the implied warranty of
  18  * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  19  * NON INFRINGEMENT.  See the GNU General Public License for more
  20  * details.
  21  *
  22  * You should have received a copy of the GNU General Public License
  23  * along with this program; if not, write to the Free Software
  24  * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  25  *
  26  * Send feedback to <greg@kroah.com>, <kristen.c.accardi@intel.com>
  27  *
  28  */
  29
  30 #include <linux/module.h>
  31 #include <linux/kernel.h>
  32 #include <linux/types.h>
  33 #include <linux/smp_lock.h>
  34 #include <linux/pci.h>
  35 #include "../pci.h"
  36 #include "pciehp.h"
  37
  38 static void interrupt_event_handler(struct controller *ctrl);
  39
  40 static struct semaphore event_semaphore;        /* mutex for process loop (up if something to process) */
  41 static struct semaphore event_exit;             /* guard ensure thread has exited before calling it quits */
  42 static int event_finished;
  43 static unsigned long pushbutton_pending;        /* = 0 */
  44 static unsigned long surprise_rm_pending;       /* = 0 */
  45
  46 u8 pciehp_handle_attention_button(u8 hp_slot, void *inst_id)
  47 {
  48         struct controller *ctrl = (struct controller *) inst_id;
  49         struct slot *p_slot;
  50         u8 rc = 0;
  51         u8 getstatus;
  52         struct event_info *taskInfo;
  53
  54         /* Attention Button Change */
  55         dbg("pciehp:  Attention button interrupt received.\n");
  56
  57         /* This is the structure that tells the worker thread what to do */
  58         taskInfo = &(ctrl->event_queue[ctrl->next_event]);
  59         p_slot = pciehp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
  60
  61         p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
  62
  63         ctrl->next_event = (ctrl->next_event + 1) % MAX_EVENTS;
  64         taskInfo->hp_slot = hp_slot;
  65
  66         rc++;
  67
  68         /*
  69          *  Button pressed - See if need to TAKE ACTION!!!
  70          */
  71         info("Button pressed on Slot(%d)\n", ctrl->first_slot + hp_slot);
  72         taskInfo->event_type = INT_BUTTON_PRESS;
  73
  74         if ((p_slot->state == BLINKINGON_STATE)
  75             || (p_slot->state == BLINKINGOFF_STATE)) {
  76                 /* Cancel if we are still blinking; this means that we press the
  77                  * attention again before the 5 sec. limit expires to cancel hot-add
  78                  * or hot-remove
  79                  */
  80                 taskInfo->event_type = INT_BUTTON_CANCEL;
  81                 info("Button cancel on Slot(%d)\n", ctrl->first_slot + hp_slot);
  82         } else if ((p_slot->state == POWERON_STATE)
  83                    || (p_slot->state == POWEROFF_STATE)) {
  84                 /* Ignore if the slot is on power-on or power-off state; this
  85                  * means that the previous attention button action to hot-add or
  86                  * hot-remove is undergoing
  87                  */
  88                 taskInfo->event_type = INT_BUTTON_IGNORE;
  89                 info("Button ignore on Slot(%d)\n", ctrl->first_slot + hp_slot);
  90         }
  91
  92         if (rc)
  93                 up(&event_semaphore);   /* signal event thread that new event is posted */
  94
  95         return 0;
  96
  97 }
  98
  99 u8 pciehp_handle_switch_change(u8 hp_slot, void *inst_id)
 100 {
 101         struct controller *ctrl = (struct controller *) inst_id;
 102         struct slot *p_slot;
 103         u8 rc = 0;
 104         u8 getstatus;
 105         struct event_info *taskInfo;
 106
 107         /* Switch Change */
 108         dbg("pciehp:  Switch interrupt received.\n");
 109
 110         /* This is the structure that tells the worker thread
 111          * what to do
 112          */
 113         taskInfo = &(ctrl->event_queue[ctrl->next_event]);
 114         ctrl->next_event = (ctrl->next_event + 1) % MAX_EVENTS;
 115         taskInfo->hp_slot = hp_slot;
 116
 117         rc++;
 118         p_slot = pciehp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
 119         p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
 120
 121         if (getstatus) {
 122                 /*
 123                  * Switch opened
 124                  */
 125                 info("Latch open on Slot(%d)\n", ctrl->first_slot + hp_slot);
 126                 taskInfo->event_type = INT_SWITCH_OPEN;
 127         } else {
 128                 /*
 129                  *  Switch closed
 130                  */
 131                 info("Latch close on Slot(%d)\n", ctrl->first_slot + hp_slot);
 132                 taskInfo->event_type = INT_SWITCH_CLOSE;
 133         }
 134
 135         if (rc)
 136                 up(&event_semaphore);   /* signal event thread that new event is posted */
 137
 138         return rc;
 139 }
 140
 141 u8 pciehp_handle_presence_change(u8 hp_slot, void *inst_id)
 142 {
 143         struct controller *ctrl = (struct controller *) inst_id;
 144         struct slot *p_slot;
 145         u8 presence_save, rc = 0;
 146         struct event_info *taskInfo;
 147
 148         /* Presence Change */
 149         dbg("pciehp:  Presence/Notify input change.\n");
 150
 151         /* This is the structure that tells the worker thread
 152          * what to do
 153          */
 154         taskInfo = &(ctrl->event_queue[ctrl->next_event]);
 155         ctrl->next_event = (ctrl->next_event + 1) % MAX_EVENTS;
 156         taskInfo->hp_slot = hp_slot;
 157
 158         rc++;
 159         p_slot = pciehp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
 160
 161         /* Switch is open, assume a presence change
 162          * Save the presence state
 163          */
 164         p_slot->hpc_ops->get_adapter_status(p_slot, &presence_save);
 165         if (presence_save) {
 166                 /*
 167                  * Card Present
 168                  */
 169                 info("Card present on Slot(%d)\n", ctrl->first_slot + hp_slot);
 170                 taskInfo->event_type = INT_PRESENCE_ON;
 171         } else {
 172                 /*
 173                  * Not Present
 174                  */
 175                 info("Card not present on Slot(%d)\n", ctrl->first_slot + hp_slot);
 176                 taskInfo->event_type = INT_PRESENCE_OFF;
 177         }
 178
 179         if (rc)
 180                 up(&event_semaphore);   /* signal event thread that new event is posted */
 181
 182         return rc;
 183 }
 184
 185 u8 pciehp_handle_power_fault(u8 hp_slot, void *inst_id)
 186 {
 187         struct controller *ctrl = (struct controller *) inst_id;
 188         struct slot *p_slot;
 189         u8 rc = 0;
 190         struct event_info *taskInfo;
 191
 192         /* power fault */
 193         dbg("pciehp:  Power fault interrupt received.\n");
 194
 195         /* this is the structure that tells the worker thread
 196          * what to do
 197          */
 198         taskInfo = &(ctrl->event_queue[ctrl->next_event]);
 199         ctrl->next_event = (ctrl->next_event + 1) % MAX_EVENTS;
 200         taskInfo->hp_slot = hp_slot;
 201
 202         rc++;
 203         p_slot = pciehp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
 204
 205         if ( !(p_slot->hpc_ops->query_power_fault(p_slot))) {
 206                 /*
 207                  * power fault Cleared
 208                  */
 209                 info("Power fault cleared on Slot(%d)\n", ctrl->first_slot + hp_slot);
 210                 p_slot->status = 0x00;
 211                 taskInfo->event_type = INT_POWER_FAULT_CLEAR;
 212         } else {
 213                 /*
 214                  *   power fault
 215                  */
 216                 info("Power fault on Slot(%d)\n", ctrl->first_slot + hp_slot);
 217                 taskInfo->event_type = INT_POWER_FAULT;
 218                 /* set power fault status for this board */
 219                 p_slot->status = 0xFF;
 220                 info("power fault bit %x set\n", hp_slot);
 221         }
 222         if (rc)
 223                 up(&event_semaphore);   /* signal event thread that new event is posted */
 224
 225         return rc;
 226 }
 227
 228 /* The following routines constitute the bulk of the
 229    hotplug controller logic
 230  */
 231
 232 static void set_slot_off(struct controller *ctrl, struct slot * pslot)
 233 {
 234         /* Wait for exclusive access to hardware */
 235         down(&ctrl->crit_sect);
 236
 237         /* turn off slot, turn on Amber LED, turn off Green LED if supported*/
 238         if (POWER_CTRL(ctrl->ctrlcap)) {
 239                 if (pslot->hpc_ops->power_off_slot(pslot)) {
 240                         err("%s: Issue of Slot Power Off command failed\n", __FUNCTION__);
 241                         up(&ctrl->crit_sect);
 242                         return;
 243                 }
 244                 wait_for_ctrl_irq (ctrl);
 245         }
 246
 247         if (PWR_LED(ctrl->ctrlcap)) {
 248                 pslot->hpc_ops->green_led_off(pslot);
 249                 wait_for_ctrl_irq (ctrl);
 250         }
 251
 252         if (ATTN_LED(ctrl->ctrlcap)) {
 253                 if (pslot->hpc_ops->set_attention_status(pslot, 1)) {
 254                         err("%s: Issue of Set Attention Led command failed\n", __FUNCTION__);
 255                         up(&ctrl->crit_sect);
 256                         return;
 257                 }
 258                 wait_for_ctrl_irq (ctrl);
 259         }
 260
 261         /* Done with exclusive hardware access */
 262         up(&ctrl->crit_sect);
 263 }
 264
 265 /**
 266  * board_added - Called after a board has been added to the system.
 267  *
 268  * Turns power on for the board
 269  * Configures board
 270  *
 271  */
 272 static int board_added(struct slot *p_slot)
 273 {
 274         u8 hp_slot;
 275         int rc = 0;
 276         struct controller *ctrl = p_slot->ctrl;
 277
 278         hp_slot = p_slot->device - ctrl->slot_device_offset;
 279
 280         dbg("%s: slot device, slot offset, hp slot = %d, %d ,%d\n",
 281                         __FUNCTION__, p_slot->device,
 282                         ctrl->slot_device_offset, hp_slot);
 283
 284         /* Wait for exclusive access to hardware */
 285         down(&ctrl->crit_sect);
 286
 287         if (POWER_CTRL(ctrl->ctrlcap)) {
 288                 /* Power on slot */
 289                 rc = p_slot->hpc_ops->power_on_slot(p_slot);
 290                 if (rc) {
 291                         up(&ctrl->crit_sect);
 292                         return -1;
 293                 }
 294
 295                 /* Wait for the command to complete */
 296                 wait_for_ctrl_irq (ctrl);
 297         }
 298
 299         if (PWR_LED(ctrl->ctrlcap)) {
 300                 p_slot->hpc_ops->green_led_blink(p_slot);
 301
 302                 /* Wait for the command to complete */
 303                 wait_for_ctrl_irq (ctrl);
 304         }
 305
 306         /* Done with exclusive hardware access */
 307         up(&ctrl->crit_sect);
 308
 309         /* Wait for ~1 second */
 310         wait_for_ctrl_irq (ctrl);
 311
 312         /*  Check link training status */
 313         rc = p_slot->hpc_ops->check_lnk_status(ctrl);
 314         if (rc) {
 315                 err("%s: Failed to check link status\n", __FUNCTION__);
 316                 set_slot_off(ctrl, p_slot);
 317                 return rc;
 318         }
 319
 320         dbg("%s: slot status = %x\n", __FUNCTION__, p_slot->status);
 321
 322         /* Check for a power fault */
 323         if (p_slot->status == 0xFF) {
 324                 /* power fault occurred, but it was benign */
 325                 rc = POWER_FAILURE;
 326                 p_slot->status = 0;
 327                 goto err_exit;
 328         }
 329
 330         rc = pciehp_configure_device(p_slot);
 331         if (rc) {
 332                 err("Cannot add device 0x%x:%x\n", p_slot->bus,
 333                                 p_slot->device);
 334                 goto err_exit;
 335         }
 336
 337         p_slot->status = 0;
 338
 339         /*
 340          * Some PCI Express root ports require fixup after hot-plug operation.
 341          */
 342         if (pcie_mch_quirk)
 343                 pci_fixup_device(pci_fixup_final, ctrl->pci_dev);
 344         if (PWR_LED(ctrl->ctrlcap)) {
 345                 /* Wait for exclusive access to hardware */
 346                 down(&ctrl->crit_sect);
 347
 348                 p_slot->hpc_ops->green_led_on(p_slot);
 349
 350                 /* Wait for the command to complete */
 351                 wait_for_ctrl_irq (ctrl);
 352
 353                 /* Done with exclusive hardware access */
 354                 up(&ctrl->crit_sect);
 355         }
 356         return 0;
 357
 358 err_exit:
 359         set_slot_off(ctrl, p_slot);
 360         return -1;
 361 }
 362
 363
 364 /**
 365  * remove_board - Turns off slot and LED's
 366  *
 367  */
 368 static int remove_board(struct slot *p_slot)
 369 {
 370         u8 device;
 371         u8 hp_slot;
 372         int rc;
 373         struct controller *ctrl = p_slot->ctrl;
 374
 375         if (pciehp_unconfigure_device(p_slot))
 376                 return 1;
 377
 378         device = p_slot->device;
 379
 380         hp_slot = p_slot->device - ctrl->slot_device_offset;
 381         p_slot = pciehp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
 382
 383         dbg("In %s, hp_slot = %d\n", __FUNCTION__, hp_slot);
 384
 385         /* Change status to shutdown */
 386         p_slot->status = 0x01;
 387
 388         /* Wait for exclusive access to hardware */
 389         down(&ctrl->crit_sect);
 390
 391         if (POWER_CTRL(ctrl->ctrlcap)) {
 392                 /* power off slot */
 393                 rc = p_slot->hpc_ops->power_off_slot(p_slot);
 394                 if (rc) {
 395                         err("%s: Issue of Slot Disable command failed\n", __FUNCTION__);
 396                         up(&ctrl->crit_sect);
 397                         return rc;
 398                 }
 399                 /* Wait for the command to complete */
 400                 wait_for_ctrl_irq (ctrl);
 401         }
 402
 403         if (PWR_LED(ctrl->ctrlcap)) {
 404                 /* turn off Green LED */
 405                 p_slot->hpc_ops->green_led_off(p_slot);
 406
 407                 /* Wait for the command to complete */
 408                 wait_for_ctrl_irq (ctrl);
 409         }
 410
 411         /* Done with exclusive hardware access */
 412         up(&ctrl->crit_sect);
 413
 414         return 0;
 415 }
 416
 417
 418 static void pushbutton_helper_thread(unsigned long data)
 419 {
 420         pushbutton_pending = data;
 421
 422         up(&event_semaphore);
 423 }
 424
 425 /**
 426  * pciehp_pushbutton_thread
 427  *
 428  * Scheduled procedure to handle blocking stuff for the pushbuttons
 429  * Handles all pending events and exits.
 430  *
 431  */
 432 static void pciehp_pushbutton_thread(unsigned long slot)
 433 {
 434         struct slot *p_slot = (struct slot *) slot;
 435         u8 getstatus;
 436
 437         pushbutton_pending = 0;
 438
 439         if (!p_slot) {
 440                 dbg("%s: Error! slot NULL\n", __FUNCTION__);
 441                 return;
 442         }
 443
 444         p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
 445         if (getstatus) {
 446                 p_slot->state = POWEROFF_STATE;
 447                 dbg("%s: disabling bus:device(%x:%x)\n", __FUNCTION__,
 448                                 p_slot->bus, p_slot->device);
 449
 450                 pciehp_disable_slot(p_slot);
 451                 p_slot->state = STATIC_STATE;
 452         } else {
 453                 p_slot->state = POWERON_STATE;
 454                 dbg("%s: adding bus:device(%x:%x)\n", __FUNCTION__,
 455                                 p_slot->bus, p_slot->device);
 456
 457                 if (pciehp_enable_slot(p_slot) && PWR_LED(p_slot->ctrl->ctrlcap)) {
 458                         /* Wait for exclusive access to hardware */
 459                         down(&p_slot->ctrl->crit_sect);
 460
 461                         p_slot->hpc_ops->green_led_off(p_slot);
 462
 463                         /* Wait for the command to complete */
 464                         wait_for_ctrl_irq (p_slot->ctrl);
 465
 466                         /* Done with exclusive hardware access */
 467                         up(&p_slot->ctrl->crit_sect);
 468                 }
 469                 p_slot->state = STATIC_STATE;
 470         }
 471
 472         return;
 473 }
 474
 475 /**
 476  * pciehp_surprise_rm_thread
 477  *
 478  * Scheduled procedure to handle blocking stuff for the surprise removal
 479  * Handles all pending events and exits.
 480  *
 481  */
 482 static void pciehp_surprise_rm_thread(unsigned long slot)
 483 {
 484         struct slot *p_slot = (struct slot *) slot;
 485         u8 getstatus;
 486
 487         surprise_rm_pending = 0;
 488
 489         if (!p_slot) {
 490                 dbg("%s: Error! slot NULL\n", __FUNCTION__);
 491                 return;
 492         }
 493
 494         p_slot->hpc_ops->get_adapter_status(p_slot, &getstatus);
 495         if (!getstatus) {
 496                 p_slot->state = POWEROFF_STATE;
 497                 dbg("%s: removing bus:device(%x:%x)\n",
 498                                 __FUNCTION__, p_slot->bus, p_slot->device);
 499
 500                 pciehp_disable_slot(p_slot);
 501                 p_slot->state = STATIC_STATE;
 502         } else {
 503                 p_slot->state = POWERON_STATE;
 504                 dbg("%s: adding bus:device(%x:%x)\n",
 505                                 __FUNCTION__, p_slot->bus, p_slot->device);
 506
 507                 if (pciehp_enable_slot(p_slot) && PWR_LED(p_slot->ctrl->ctrlcap)) {
 508                         /* Wait for exclusive access to hardware */
 509                         down(&p_slot->ctrl->crit_sect);
 510
 511                         p_slot->hpc_ops->green_led_off(p_slot);
 512
 513                         /* Wait for the command to complete */
 514                         wait_for_ctrl_irq (p_slot->ctrl);
 515
 516                         /* Done with exclusive hardware access */
 517                         up(&p_slot->ctrl->crit_sect);
 518                 }
 519                 p_slot->state = STATIC_STATE;
 520         }
 521
 522         return;
 523 }
 524
 525
 526
 527 /* this is the main worker thread */
 528 static int event_thread(void* data)
 529 {
 530         struct controller *ctrl;
 531         lock_kernel();
 532         daemonize("pciehpd_event");
 533
 534         unlock_kernel();
 535
 536         while (1) {
 537                 dbg("!!!!event_thread sleeping\n");
 538                 down_interruptible (&event_semaphore);
 539                 dbg("event_thread woken finished = %d\n", event_finished);
 540                 if (event_finished || signal_pending(current))
 541                         break;
 542                 /* Do stuff here */
 543                 if (pushbutton_pending)
 544                         pciehp_pushbutton_thread(pushbutton_pending);
 545                 else if (surprise_rm_pending)
 546                         pciehp_surprise_rm_thread(surprise_rm_pending);
 547                 else
 548                         for (ctrl = pciehp_ctrl_list; ctrl; ctrl=ctrl->next)
 549                                 interrupt_event_handler(ctrl);
 550         }
 551         dbg("event_thread signals exit\n");
 552         up(&event_exit);
 553         return 0;
 554 }
 555
 556 int pciehp_event_start_thread(void)
 557 {
 558         int pid;
 559
 560         /* initialize our semaphores */
 561         init_MUTEX_LOCKED(&event_exit);
 562         event_finished=0;
 563
 564         init_MUTEX_LOCKED(&event_semaphore);
 565         pid = kernel_thread(event_thread, NULL, 0);
 566
 567         if (pid < 0) {
 568                 err ("Can't start up our event thread\n");
 569                 return -1;
 570         }
 571         return 0;
 572 }
 573
 574
 575 void pciehp_event_stop_thread(void)
 576 {
 577         event_finished = 1;
 578         up(&event_semaphore);
 579         down(&event_exit);
 580 }
 581
 582
 583 static int update_slot_info(struct slot *slot)
 584 {
 585         struct hotplug_slot_info *info;
 586         /* char buffer[SLOT_NAME_SIZE]; */
 587         int result;
 588
 589         info = kmalloc(sizeof(struct hotplug_slot_info), GFP_KERNEL);
 590         if (!info)
 591                 return -ENOMEM;
 592
 593         /* make_slot_name (&buffer[0], SLOT_NAME_SIZE, slot); */
 594
 595         slot->hpc_ops->get_power_status(slot, &(info->power_status));
 596         slot->hpc_ops->get_attention_status(slot, &(info->attention_status));
 597         slot->hpc_ops->get_latch_status(slot, &(info->latch_status));
 598         slot->hpc_ops->get_adapter_status(slot, &(info->adapter_status));
 599
 600         /* result = pci_hp_change_slot_info(buffer, info); */
 601         result = pci_hp_change_slot_info(slot->hotplug_slot, info);
 602         kfree (info);
 603         return result;
 604 }
 605
 606 static void interrupt_event_handler(struct controller *ctrl)
 607 {
 608         int loop = 0;
 609         int change = 1;
 610         u8 hp_slot;
 611         u8 getstatus;
 612         struct slot *p_slot;
 613
 614         while (change) {
 615                 change = 0;
 616
 617                 for (loop = 0; loop < MAX_EVENTS; loop++) {
 618                         if (ctrl->event_queue[loop].event_type != 0) {
 619                                 hp_slot = ctrl->event_queue[loop].hp_slot;
 620
 621                                 p_slot = pciehp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
 622
 623                                 if (ctrl->event_queue[loop].event_type == INT_BUTTON_CANCEL) {
 624                                         dbg("button cancel\n");
 625                                         del_timer(&p_slot->task_event);
 626
 627                                         switch (p_slot->state) {
 628                                         case BLINKINGOFF_STATE:
 629                                                 /* Wait for exclusive access to hardware */
 630                                                 down(&ctrl->crit_sect);
 631
 632                                                 if (PWR_LED(ctrl->ctrlcap)) {
 633                                                         p_slot->hpc_ops->green_led_on(p_slot);
 634                                                         /* Wait for the command to complete */
 635                                                         wait_for_ctrl_irq (ctrl);
 636                                                 }
 637                                                 if (ATTN_LED(ctrl->ctrlcap)) {
 638                                                         p_slot->hpc_ops->set_attention_status(p_slot, 0);
 639
 640                                                         /* Wait for the command to complete */
 641                                                         wait_for_ctrl_irq (ctrl);
 642                                                 }
 643                                                 /* Done with exclusive hardware access */
 644                                                 up(&ctrl->crit_sect);
 645                                                 break;
 646                                         case BLINKINGON_STATE:
 647                                                 /* Wait for exclusive access to hardware */
 648                                                 down(&ctrl->crit_sect);
 649
 650                                                 if (PWR_LED(ctrl->ctrlcap)) {
 651                                                         p_slot->hpc_ops->green_led_off(p_slot);
 652                                                         /* Wait for the command to complete */
 653                                                         wait_for_ctrl_irq (ctrl);
 654                                                 }
 655                                                 if (ATTN_LED(ctrl->ctrlcap)){
 656                                                         p_slot->hpc_ops->set_attention_status(p_slot, 0);
 657                                                         /* Wait for the command to complete */
 658                                                         wait_for_ctrl_irq (ctrl);
 659                                                 }
 660                                                 /* Done with exclusive hardware access */
 661                                                 up(&ctrl->crit_sect);
 662
 663                                                 break;
 664                                         default:
 665                                                 warn("Not a valid state\n");
 666                                                 return;
 667                                         }
 668                                         info(msg_button_cancel, p_slot->number);
 669                                         p_slot->state = STATIC_STATE;
 670                                 }
 671                                 /* ***********Button Pressed (No action on 1st press...) */
 672                                 else if (ctrl->event_queue[loop].event_type == INT_BUTTON_PRESS) {
 673
 674                                         if (ATTN_BUTTN(ctrl->ctrlcap)) {
 675                                                 dbg("Button pressed\n");
 676                                                 p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
 677                                                 if (getstatus) {
 678                                                         /* slot is on */
 679                                                         dbg("slot is on\n");
 680                                                         p_slot->state = BLINKINGOFF_STATE;
 681                                                         info(msg_button_off, p_slot->number);
 682                                                 } else {
 683                                                         /* slot is off */
 684                                                         dbg("slot is off\n");
 685                                                         p_slot->state = BLINKINGON_STATE;
 686                                                         info(msg_button_on, p_slot->number);
 687                                                 }
 688
 689                                                 /* Wait for exclusive access to hardware */
 690                                                 down(&ctrl->crit_sect);
 691
 692                                                 /* blink green LED and turn off amber */
 693                                                 if (PWR_LED(ctrl->ctrlcap)) {
 694                                                         p_slot->hpc_ops->green_led_blink(p_slot);
 695                                                         /* Wait for the command to complete */
 696                                                         wait_for_ctrl_irq (ctrl);
 697                                                 }
 698
 699                                                 if (ATTN_LED(ctrl->ctrlcap)) {
 700                                                         p_slot->hpc_ops->set_attention_status(p_slot, 0);
 701
 702                                                         /* Wait for the command to complete */
 703                                                         wait_for_ctrl_irq (ctrl);
 704                                                 }
 705
 706                                                 /* Done with exclusive hardware access */
 707                                                 up(&ctrl->crit_sect);
 708
 709                                                 init_timer(&p_slot->task_event);
 710                                                 p_slot->task_event.expires = jiffies + 5 * HZ;   /* 5 second delay */
 711                                                 p_slot->task_event.function = (void (*)(unsigned long)) pushbutton_helper_thread;
 712                                                 p_slot->task_event.data = (unsigned long) p_slot;
 713
 714                                                 add_timer(&p_slot->task_event);
 715                                         }
 716                                 }
 717                                 /***********POWER FAULT********************/
 718                                 else if (ctrl->event_queue[loop].event_type == INT_POWER_FAULT) {
 719                                         if (POWER_CTRL(ctrl->ctrlcap)) {
 720                                                 dbg("power fault\n");
 721                                                 /* Wait for exclusive access to hardware */
 722                                                 down(&ctrl->crit_sect);
 723
 724                                                 if (ATTN_LED(ctrl->ctrlcap)) {
 725                                                         p_slot->hpc_ops->set_attention_status(p_slot, 1);
 726                                                         wait_for_ctrl_irq (ctrl);
 727                                                 }
 728
 729                                                 if (PWR_LED(ctrl->ctrlcap)) {
 730                                                         p_slot->hpc_ops->green_led_off(p_slot);
 731                                                         wait_for_ctrl_irq (ctrl);
 732                                                 }
 733
 734                                                 /* Done with exclusive hardware access */
 735                                                 up(&ctrl->crit_sect);
 736                                         }
 737                                 }
 738                                 /***********SURPRISE REMOVAL********************/
 739                                 else if ((ctrl->event_queue[loop].event_type == INT_PRESENCE_ON) ||
 740                                         (ctrl->event_queue[loop].event_type == INT_PRESENCE_OFF)) {
 741                                         if (HP_SUPR_RM(ctrl->ctrlcap)) {
 742                                                 dbg("Surprise Removal\n");
 743                                                 if (p_slot) {
 744                                                         surprise_rm_pending = (unsigned long) p_slot;
 745                                                         up(&event_semaphore);
 746                                                         update_slot_info(p_slot);
 747                                                 }
 748                                         }
 749                                 } else {
 750                                         /* refresh notification */
 751                                         if (p_slot)
 752                                                 update_slot_info(p_slot);
 753                                 }
 754
 755                                 ctrl->event_queue[loop].event_type = 0;
 756
 757                                 change = 1;
 758                         }
 759                 }               /* End of FOR loop */
 760         }
 761 }
 762
 763
 764 int pciehp_enable_slot(struct slot *p_slot)
 765 {
 766         u8 getstatus = 0;
 767         int rc;
 768
 769         /* Check to see if (latch closed, card present, power off) */
 770         down(&p_slot->ctrl->crit_sect);
 771
 772         rc = p_slot->hpc_ops->get_adapter_status(p_slot, &getstatus);
 773         if (rc || !getstatus) {
 774                 info("%s: no adapter on slot(%x)\n", __FUNCTION__, p_slot->number);
 775                 up(&p_slot->ctrl->crit_sect);
 776                 return 1;
 777         }
 778         if (MRL_SENS(p_slot->ctrl->ctrlcap)) {
 779                 rc = p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
 780                 if (rc || getstatus) {
 781                         info("%s: latch open on slot(%x)\n", __FUNCTION__, p_slot->number);
 782                         up(&p_slot->ctrl->crit_sect);
 783                         return 1;
 784                 }
 785         }
 786
 787         if (POWER_CTRL(p_slot->ctrl->ctrlcap)) {
 788                 rc = p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
 789                 if (rc || getstatus) {
 790                         info("%s: already enabled on slot(%x)\n", __FUNCTION__, p_slot->number);
 791                         up(&p_slot->ctrl->crit_sect);
 792                         return 1;
 793                 }
 794         }
 795         up(&p_slot->ctrl->crit_sect);
 796
 797         p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
 798
 799         rc = board_added(p_slot);
 800         if (rc) {
 801                 p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
 802         }
 803
 804         if (p_slot)
 805                 update_slot_info(p_slot);
 806
 807         return rc;
 808 }
 809
 810
 811 int pciehp_disable_slot(struct slot *p_slot)
 812 {
 813         u8 getstatus = 0;
 814         int ret = 0;
 815
 816         if (!p_slot->ctrl)
 817                 return 1;
 818
 819         /* Check to see if (latch closed, card present, power on) */
 820         down(&p_slot->ctrl->crit_sect);
 821
 822         if (!HP_SUPR_RM(p_slot->ctrl->ctrlcap)) {
 823                 ret = p_slot->hpc_ops->get_adapter_status(p_slot, &getstatus);
 824                 if (ret || !getstatus) {
 825                         info("%s: no adapter on slot(%x)\n", __FUNCTION__, p_slot->number);
 826                         up(&p_slot->ctrl->crit_sect);
 827                         return 1;
 828                 }
 829         }
 830
 831         if (MRL_SENS(p_slot->ctrl->ctrlcap)) {
 832                 ret = p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
 833                 if (ret || getstatus) {
 834                         info("%s: latch open on slot(%x)\n", __FUNCTION__, p_slot->number);
 835                         up(&p_slot->ctrl->crit_sect);
 836                         return 1;
 837                 }
 838         }
 839
 840         if (POWER_CTRL(p_slot->ctrl->ctrlcap)) {
 841                 ret = p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
 842                 if (ret || !getstatus) {
 843                         info("%s: already disabled slot(%x)\n", __FUNCTION__, p_slot->number);
 844                         up(&p_slot->ctrl->crit_sect);
 845                         return 1;
 846                 }
 847         }
 848
 849         up(&p_slot->ctrl->crit_sect);
 850
 851         ret = remove_board(p_slot);
 852         update_slot_info(p_slot);
 853         return ret;
 854 }
 855