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