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