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