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/config.h>
  31 #include <linux/module.h>
  32 #include <linux/kernel.h>
  33 #include <linux/types.h>
  34 #include <linux/slab.h>
  35 #include <linux/workqueue.h>
  36 #include <linux/interrupt.h>
  37 #include <linux/delay.h>
  38 #include <linux/wait.h>
  39 #include <linux/smp_lock.h>
  40 #include <linux/pci.h>
  41 #include "../pci.h"
  42 #include "pciehp.h"
  43
  44 static void interrupt_event_handler(struct controller *ctrl);
  45
  46 static struct semaphore event_semaphore;        /* mutex for process loop (up if something to process) */
  47 static struct semaphore event_exit;             /* guard ensure thread has exited before calling it quits */
  48 static int event_finished;
  49 static unsigned long pushbutton_pending;        /* = 0 */
  50 static unsigned long surprise_rm_pending;       /* = 0 */
  51
  52 u8 pciehp_handle_attention_button(u8 hp_slot, void *inst_id)
  53 {
  54         struct controller *ctrl = (struct controller *) inst_id;
  55         struct slot *p_slot;
  56         u8 rc = 0;
  57         u8 getstatus;
  58         struct event_info *taskInfo;
  59
  60         /* Attention Button Change */
  61         dbg("pciehp:  Attention button interrupt received.\n");
  62
  63         /* This is the structure that tells the worker thread what to do */
  64         taskInfo = &(ctrl->event_queue[ctrl->next_event]);
  65         p_slot = pciehp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
  66
  67         p_slot->hpc_ops->get_adapter_status(p_slot, &(p_slot->presence_save));
  68         p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
  69
  70         ctrl->next_event = (ctrl->next_event + 1) % 10;
  71         taskInfo->hp_slot = hp_slot;
  72
  73         rc++;
  74
  75         /*
  76          *  Button pressed - See if need to TAKE ACTION!!!
  77          */
  78         info("Button pressed on Slot(%d)\n", ctrl->first_slot + hp_slot);
  79         taskInfo->event_type = INT_BUTTON_PRESS;
  80
  81         if ((p_slot->state == BLINKINGON_STATE)
  82             || (p_slot->state == BLINKINGOFF_STATE)) {
  83                 /* Cancel if we are still blinking; this means that we press the
  84                  * attention again before the 5 sec. limit expires to cancel hot-add
  85                  * or hot-remove
  86                  */
  87                 taskInfo->event_type = INT_BUTTON_CANCEL;
  88                 info("Button cancel on Slot(%d)\n", ctrl->first_slot + hp_slot);
  89         } else if ((p_slot->state == POWERON_STATE)
  90                    || (p_slot->state == POWEROFF_STATE)) {
  91                 /* Ignore if the slot is on power-on or power-off state; this
  92                  * means that the previous attention button action to hot-add or
  93                  * hot-remove is undergoing
  94                  */
  95                 taskInfo->event_type = INT_BUTTON_IGNORE;
  96                 info("Button ignore on Slot(%d)\n", ctrl->first_slot + hp_slot);
  97         }
  98
  99         if (rc)
 100                 up(&event_semaphore);   /* signal event thread that new event is posted */
 101
 102         return 0;
 103
 104 }
 105
 106 u8 pciehp_handle_switch_change(u8 hp_slot, void *inst_id)
 107 {
 108         struct controller *ctrl = (struct controller *) inst_id;
 109         struct slot *p_slot;
 110         u8 rc = 0;
 111         u8 getstatus;
 112         struct event_info *taskInfo;
 113
 114         /* Switch Change */
 115         dbg("pciehp:  Switch interrupt received.\n");
 116
 117         /* This is the structure that tells the worker thread
 118          * what to do
 119          */
 120         taskInfo = &(ctrl->event_queue[ctrl->next_event]);
 121         ctrl->next_event = (ctrl->next_event + 1) % 10;
 122         taskInfo->hp_slot = hp_slot;
 123
 124         rc++;
 125         p_slot = pciehp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
 126         p_slot->hpc_ops->get_adapter_status(p_slot, &(p_slot->presence_save));
 127         p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
 128
 129         if (getstatus) {
 130                 /*
 131                  * Switch opened
 132                  */
 133                 info("Latch open on Slot(%d)\n", ctrl->first_slot + hp_slot);
 134                 p_slot->switch_save = 0;
 135                 taskInfo->event_type = INT_SWITCH_OPEN;
 136         } else {
 137                 /*
 138                  *  Switch closed
 139                  */
 140                 info("Latch close on Slot(%d)\n", ctrl->first_slot + hp_slot);
 141                 p_slot->switch_save = 0x10;
 142                 taskInfo->event_type = INT_SWITCH_CLOSE;
 143         }
 144
 145         if (rc)
 146                 up(&event_semaphore);   /* signal event thread that new event is posted */
 147
 148         return rc;
 149 }
 150
 151 u8 pciehp_handle_presence_change(u8 hp_slot, void *inst_id)
 152 {
 153         struct controller *ctrl = (struct controller *) inst_id;
 154         struct slot *p_slot;
 155         u8 rc = 0;
 156         struct event_info *taskInfo;
 157
 158         /* Presence Change */
 159         dbg("pciehp:  Presence/Notify input change.\n");
 160
 161         /* This is the structure that tells the worker thread
 162          * what to do
 163          */
 164         taskInfo = &(ctrl->event_queue[ctrl->next_event]);
 165         ctrl->next_event = (ctrl->next_event + 1) % 10;
 166         taskInfo->hp_slot = hp_slot;
 167
 168         rc++;
 169         p_slot = pciehp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
 170
 171         /* Switch is open, assume a presence change
 172          * Save the presence state
 173          */
 174         p_slot->hpc_ops->get_adapter_status(p_slot, &(p_slot->presence_save));
 175         if (p_slot->presence_save) {
 176                 /*
 177                  * Card Present
 178                  */
 179                 info("Card present on Slot(%d)\n", ctrl->first_slot + hp_slot);
 180                 taskInfo->event_type = INT_PRESENCE_ON;
 181         } else {
 182                 /*
 183                  * Not Present
 184                  */
 185                 info("Card not present on Slot(%d)\n", ctrl->first_slot + hp_slot);
 186                 taskInfo->event_type = INT_PRESENCE_OFF;
 187         }
 188
 189         if (rc)
 190                 up(&event_semaphore);   /* signal event thread that new event is posted */
 191
 192         return rc;
 193 }
 194
 195 u8 pciehp_handle_power_fault(u8 hp_slot, void *inst_id)
 196 {
 197         struct controller *ctrl = (struct controller *) inst_id;
 198         struct slot *p_slot;
 199         u8 rc = 0;
 200         struct event_info *taskInfo;
 201
 202         /* power fault */
 203         dbg("pciehp:  Power fault interrupt received.\n");
 204
 205         /* this is the structure that tells the worker thread
 206          * what to do
 207          */
 208         taskInfo = &(ctrl->event_queue[ctrl->next_event]);
 209         ctrl->next_event = (ctrl->next_event + 1) % 10;
 210         taskInfo->hp_slot = hp_slot;
 211
 212         rc++;
 213         p_slot = pciehp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
 214
 215         if ( !(p_slot->hpc_ops->query_power_fault(p_slot))) {
 216                 /*
 217                  * power fault Cleared
 218                  */
 219                 info("Power fault cleared on Slot(%d)\n", ctrl->first_slot + hp_slot);
 220                 p_slot->status = 0x00;
 221                 taskInfo->event_type = INT_POWER_FAULT_CLEAR;
 222         } else {
 223                 /*
 224                  *   power fault
 225                  */
 226                 info("Power fault on Slot(%d)\n", ctrl->first_slot + hp_slot);
 227                 taskInfo->event_type = INT_POWER_FAULT;
 228                 /* set power fault status for this board */
 229                 p_slot->status = 0xFF;
 230                 info("power fault bit %x set\n", hp_slot);
 231         }
 232         if (rc)
 233                 up(&event_semaphore);   /* signal event thread that new event is posted */
 234
 235         return rc;
 236 }
 237
 238 /* The following routines constitute the bulk of the
 239    hotplug controller logic
 240  */
 241
 242 static void set_slot_off(struct controller *ctrl, struct slot * pslot)
 243 {
 244         /* Wait for exclusive access to hardware */
 245         down(&ctrl->crit_sect);
 246
 247         /* turn off slot, turn on Amber LED, turn off Green LED if supported*/
 248         if (POWER_CTRL(ctrl->ctrlcap)) {
 249                 if (pslot->hpc_ops->power_off_slot(pslot)) {
 250                         err("%s: Issue of Slot Power Off command failed\n", __FUNCTION__);
 251                         up(&ctrl->crit_sect);
 252                         return;
 253                 }
 254                 wait_for_ctrl_irq (ctrl);
 255         }
 256
 257         if (PWR_LED(ctrl->ctrlcap)) {
 258                 pslot->hpc_ops->green_led_off(pslot);
 259                 wait_for_ctrl_irq (ctrl);
 260         }
 261
 262         if (ATTN_LED(ctrl->ctrlcap)) {
 263                 if (pslot->hpc_ops->set_attention_status(pslot, 1)) {
 264                         err("%s: Issue of Set Attention Led command failed\n", __FUNCTION__);
 265                         up(&ctrl->crit_sect);
 266                         return;
 267                 }
 268                 wait_for_ctrl_irq (ctrl);
 269         }
 270
 271         /* Done with exclusive hardware access */
 272         up(&ctrl->crit_sect);
 273 }
 274
 275 /**
 276  * board_added - Called after a board has been added to the system.
 277  *
 278  * Turns power on for the board
 279  * Configures board
 280  *
 281  */
 282 static u32 board_added(struct slot *p_slot)
 283 {
 284         u8 hp_slot;
 285         u32 temp_register = 0xFFFFFFFF;
 286         u32 rc = 0;
 287         struct controller *ctrl = p_slot->ctrl;
 288
 289         hp_slot = p_slot->device - ctrl->slot_device_offset;
 290
 291         dbg("%s: p_slot->device, slot_offset, hp_slot = %d, %d ,%d\n", __FUNCTION__, p_slot->device, ctrl->slot_device_offset, hp_slot);
 292
 293         /* Wait for exclusive access to hardware */
 294         down(&ctrl->crit_sect);
 295
 296         if (POWER_CTRL(ctrl->ctrlcap)) {
 297                 /* Power on slot */
 298                 rc = p_slot->hpc_ops->power_on_slot(p_slot);
 299                 if (rc) {
 300                         up(&ctrl->crit_sect);
 301                         return -1;
 302                 }
 303
 304                 /* Wait for the command to complete */
 305                 wait_for_ctrl_irq (ctrl);
 306         }
 307
 308         if (PWR_LED(ctrl->ctrlcap)) {
 309                 p_slot->hpc_ops->green_led_blink(p_slot);
 310
 311                 /* Wait for the command to complete */
 312                 wait_for_ctrl_irq (ctrl);
 313         }
 314
 315         /* Done with exclusive hardware access */
 316         up(&ctrl->crit_sect);
 317
 318         /* Wait for ~1 second */
 319         dbg("%s: before long_delay\n", __FUNCTION__);
 320         wait_for_ctrl_irq (ctrl);
 321         dbg("%s: afterlong_delay\n", __FUNCTION__);
 322
 323         /*  Check link training status */
 324         rc = p_slot->hpc_ops->check_lnk_status(ctrl);
 325         if (rc) {
 326                 err("%s: Failed to check link status\n", __FUNCTION__);
 327                 set_slot_off(ctrl, p_slot);
 328                 return rc;
 329         }
 330
 331         dbg("%s: slot status = %x\n", __FUNCTION__, p_slot->status);
 332
 333         /* Check for a power fault */
 334         if (p_slot->status == 0xFF) {
 335                 /* power fault occurred, but it was benign */
 336                 temp_register = 0xFFFFFFFF;
 337                 dbg("%s: temp register set to %x by power fault\n", __FUNCTION__, temp_register);
 338                 rc = POWER_FAILURE;
 339                 p_slot->status = 0;
 340                 goto err_exit;
 341         }
 342
 343         rc = pciehp_configure_device(p_slot);
 344         if (rc) {
 345                 err("Cannot add device 0x%x:%x\n", p_slot->bus,
 346                                 p_slot->device);
 347                 goto err_exit;
 348         }
 349
 350         p_slot->status = 0;
 351         p_slot->switch_save = 0x10;
 352         p_slot->is_a_board = 0x01;
 353
 354         /*
 355          * Some PCI Express root ports require fixup after hot-plug operation.
 356          */
 357         if (pcie_mch_quirk)
 358                 pci_fixup_device(pci_fixup_final, ctrl->pci_dev);
 359         if (PWR_LED(ctrl->ctrlcap)) {
 360                 /* Wait for exclusive access to hardware */
 361                 down(&ctrl->crit_sect);
 362
 363                 p_slot->hpc_ops->green_led_on(p_slot);
 364
 365                 /* Wait for the command to complete */
 366                 wait_for_ctrl_irq (ctrl);
 367
 368                 /* Done with exclusive hardware access */
 369                 up(&ctrl->crit_sect);
 370         }
 371         return 0;
 372
 373 err_exit:
 374         set_slot_off(ctrl, p_slot);
 375         return -1;
 376 }
 377
 378
 379 /**
 380  * remove_board - Turns off slot and LED's
 381  *
 382  */
 383 static u32 remove_board(struct slot *p_slot)
 384 {
 385         u8 device;
 386         u8 hp_slot;
 387         u32 rc;
 388         struct controller *ctrl = p_slot->ctrl;
 389
 390         if (pciehp_unconfigure_device(p_slot))
 391                 return 1;
 392
 393         device = p_slot->device;
 394
 395         hp_slot = p_slot->device - ctrl->slot_device_offset;
 396         p_slot = pciehp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
 397
 398         dbg("In %s, hp_slot = %d\n", __FUNCTION__, hp_slot);
 399
 400         /* Change status to shutdown */
 401         if (p_slot->is_a_board)
 402                 p_slot->status = 0x01;
 403         p_slot->configured = 0;
 404
 405         /* Wait for exclusive access to hardware */
 406         down(&ctrl->crit_sect);
 407
 408         if (POWER_CTRL(ctrl->ctrlcap)) {
 409                 /* power off slot */
 410                 rc = p_slot->hpc_ops->power_off_slot(p_slot);
 411                 if (rc) {
 412                         err("%s: Issue of Slot Disable command failed\n", __FUNCTION__);
 413                         up(&ctrl->crit_sect);
 414                         return rc;
 415                 }
 416                 /* Wait for the command to complete */
 417                 wait_for_ctrl_irq (ctrl);
 418         }
 419
 420         if (PWR_LED(ctrl->ctrlcap)) {
 421                 /* turn off Green LED */
 422                 p_slot->hpc_ops->green_led_off(p_slot);
 423
 424                 /* Wait for the command to complete */
 425                 wait_for_ctrl_irq (ctrl);
 426         }
 427
 428         /* Done with exclusive hardware access */
 429         up(&ctrl->crit_sect);
 430
 431         p_slot->switch_save = 0x10;
 432         p_slot->is_a_board = 0;
 433
 434         return 0;
 435 }
 436
 437
 438 static void pushbutton_helper_thread(unsigned long data)
 439 {
 440         pushbutton_pending = data;
 441
 442         up(&event_semaphore);
 443 }
 444
 445 /**
 446  * pciehp_pushbutton_thread
 447  *
 448  * Scheduled procedure to handle blocking stuff for the pushbuttons
 449  * Handles all pending events and exits.
 450  *
 451  */
 452 static void pciehp_pushbutton_thread(unsigned long slot)
 453 {
 454         struct slot *p_slot = (struct slot *) slot;
 455         u8 getstatus;
 456
 457         pushbutton_pending = 0;
 458
 459         if (!p_slot) {
 460                 dbg("%s: Error! slot NULL\n", __FUNCTION__);
 461                 return;
 462         }
 463
 464         p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
 465         if (getstatus) {
 466                 p_slot->state = POWEROFF_STATE;
 467                 dbg("In power_down_board, b:d(%x:%x)\n", p_slot->bus, p_slot->device);
 468
 469                 pciehp_disable_slot(p_slot);
 470                 p_slot->state = STATIC_STATE;
 471         } else {
 472                 p_slot->state = POWERON_STATE;
 473                 dbg("In add_board, b:d(%x:%x)\n", p_slot->bus, p_slot->device);
 474
 475                 if (pciehp_enable_slot(p_slot) && PWR_LED(p_slot->ctrl->ctrlcap)) {
 476                         /* Wait for exclusive access to hardware */
 477                         down(&p_slot->ctrl->crit_sect);
 478
 479                         p_slot->hpc_ops->green_led_off(p_slot);
 480
 481                         /* Wait for the command to complete */
 482                         wait_for_ctrl_irq (p_slot->ctrl);
 483
 484                         /* Done with exclusive hardware access */
 485                         up(&p_slot->ctrl->crit_sect);
 486                 }
 487                 p_slot->state = STATIC_STATE;
 488         }
 489
 490         return;
 491 }
 492
 493 /**
 494  * pciehp_surprise_rm_thread
 495  *
 496  * Scheduled procedure to handle blocking stuff for the surprise removal
 497  * Handles all pending events and exits.
 498  *
 499  */
 500 static void pciehp_surprise_rm_thread(unsigned long slot)
 501 {
 502         struct slot *p_slot = (struct slot *) slot;
 503         u8 getstatus;
 504
 505         surprise_rm_pending = 0;
 506
 507         if (!p_slot) {
 508                 dbg("%s: Error! slot NULL\n", __FUNCTION__);
 509                 return;
 510         }
 511
 512         p_slot->hpc_ops->get_adapter_status(p_slot, &getstatus);
 513         if (!getstatus) {
 514                 p_slot->state = POWEROFF_STATE;
 515                 dbg("In removing board, b:d(%x:%x)\n", p_slot->bus, p_slot->device);
 516
 517                 pciehp_disable_slot(p_slot);
 518                 p_slot->state = STATIC_STATE;
 519         } else {
 520                 p_slot->state = POWERON_STATE;
 521                 dbg("In add_board, b:d(%x:%x)\n", p_slot->bus, p_slot->device);
 522
 523                 if (pciehp_enable_slot(p_slot) && PWR_LED(p_slot->ctrl->ctrlcap)) {
 524                         /* Wait for exclusive access to hardware */
 525                         down(&p_slot->ctrl->crit_sect);
 526
 527                         p_slot->hpc_ops->green_led_off(p_slot);
 528
 529                         /* Wait for the command to complete */
 530                         wait_for_ctrl_irq (p_slot->ctrl);
 531
 532                         /* Done with exclusive hardware access */
 533                         up(&p_slot->ctrl->crit_sect);
 534                 }
 535                 p_slot->state = STATIC_STATE;
 536         }
 537
 538         return;
 539 }
 540
 541
 542
 543 /* this is the main worker thread */
 544 static int event_thread(void* data)
 545 {
 546         struct controller *ctrl;
 547         lock_kernel();
 548         daemonize("pciehpd_event");
 549
 550         unlock_kernel();
 551
 552         while (1) {
 553                 dbg("!!!!event_thread sleeping\n");
 554                 down_interruptible (&event_semaphore);
 555                 dbg("event_thread woken finished = %d\n", event_finished);
 556                 if (event_finished || signal_pending(current))
 557                         break;
 558                 /* Do stuff here */
 559                 if (pushbutton_pending)
 560                         pciehp_pushbutton_thread(pushbutton_pending);
 561                 else if (surprise_rm_pending)
 562                         pciehp_surprise_rm_thread(surprise_rm_pending);
 563                 else
 564                         for (ctrl = pciehp_ctrl_list; ctrl; ctrl=ctrl->next)
 565                                 interrupt_event_handler(ctrl);
 566         }
 567         dbg("event_thread signals exit\n");
 568         up(&event_exit);
 569         return 0;
 570 }
 571
 572 int pciehp_event_start_thread(void)
 573 {
 574         int pid;
 575
 576         /* initialize our semaphores */
 577         init_MUTEX_LOCKED(&event_exit);
 578         event_finished=0;
 579
 580         init_MUTEX_LOCKED(&event_semaphore);
 581         pid = kernel_thread(event_thread, NULL, 0);
 582
 583         if (pid < 0) {
 584                 err ("Can't start up our event thread\n");
 585                 return -1;
 586         }
 587         dbg("Our event thread pid = %d\n", pid);
 588         return 0;
 589 }
 590
 591
 592 void pciehp_event_stop_thread(void)
 593 {
 594         event_finished = 1;
 595         dbg("event_thread finish command given\n");
 596         up(&event_semaphore);
 597         dbg("wait for event_thread to exit\n");
 598         down(&event_exit);
 599 }
 600
 601
 602 static int update_slot_info(struct slot *slot)
 603 {
 604         struct hotplug_slot_info *info;
 605         /* char buffer[SLOT_NAME_SIZE]; */
 606         int result;
 607
 608         info = kmalloc(sizeof(struct hotplug_slot_info), GFP_KERNEL);
 609         if (!info)
 610                 return -ENOMEM;
 611
 612         /* make_slot_name (&buffer[0], SLOT_NAME_SIZE, slot); */
 613
 614         slot->hpc_ops->get_power_status(slot, &(info->power_status));
 615         slot->hpc_ops->get_attention_status(slot, &(info->attention_status));
 616         slot->hpc_ops->get_latch_status(slot, &(info->latch_status));
 617         slot->hpc_ops->get_adapter_status(slot, &(info->adapter_status));
 618
 619         /* result = pci_hp_change_slot_info(buffer, info); */
 620         result = pci_hp_change_slot_info(slot->hotplug_slot, info);
 621         kfree (info);
 622         return result;
 623 }
 624
 625 static void interrupt_event_handler(struct controller *ctrl)
 626 {
 627         int loop = 0;
 628         int change = 1;
 629         u8 hp_slot;
 630         u8 getstatus;
 631         struct slot *p_slot;
 632
 633         while (change) {
 634                 change = 0;
 635
 636                 for (loop = 0; loop < 10; loop++) {
 637                         if (ctrl->event_queue[loop].event_type != 0) {
 638                                 hp_slot = ctrl->event_queue[loop].hp_slot;
 639
 640                                 p_slot = pciehp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset);
 641
 642                                 dbg("hp_slot %d, p_slot %p\n", hp_slot, p_slot);
 643
 644                                 if (ctrl->event_queue[loop].event_type == INT_BUTTON_CANCEL) {
 645                                         dbg("button cancel\n");
 646                                         del_timer(&p_slot->task_event);
 647
 648                                         switch (p_slot->state) {
 649                                         case BLINKINGOFF_STATE:
 650                                                 /* Wait for exclusive access to hardware */
 651                                                 down(&ctrl->crit_sect);
 652
 653                                                 if (PWR_LED(ctrl->ctrlcap)) {
 654                                                         p_slot->hpc_ops->green_led_on(p_slot);
 655                                                         /* Wait for the command to complete */
 656                                                         wait_for_ctrl_irq (ctrl);
 657                                                 }
 658                                                 if (ATTN_LED(ctrl->ctrlcap)) {
 659                                                         p_slot->hpc_ops->set_attention_status(p_slot, 0);
 660
 661                                                         /* Wait for the command to complete */
 662                                                         wait_for_ctrl_irq (ctrl);
 663                                                 }
 664                                                 /* Done with exclusive hardware access */
 665                                                 up(&ctrl->crit_sect);
 666                                                 break;
 667                                         case BLINKINGON_STATE:
 668                                                 /* Wait for exclusive access to hardware */
 669                                                 down(&ctrl->crit_sect);
 670
 671                                                 if (PWR_LED(ctrl->ctrlcap)) {
 672                                                         p_slot->hpc_ops->green_led_off(p_slot);
 673                                                         /* Wait for the command to complete */
 674                                                         wait_for_ctrl_irq (ctrl);
 675                                                 }
 676                                                 if (ATTN_LED(ctrl->ctrlcap)){
 677                                                         p_slot->hpc_ops->set_attention_status(p_slot, 0);
 678                                                         /* Wait for the command to complete */
 679                                                         wait_for_ctrl_irq (ctrl);
 680                                                 }
 681                                                 /* Done with exclusive hardware access */
 682                                                 up(&ctrl->crit_sect);
 683
 684                                                 break;
 685                                         default:
 686                                                 warn("Not a valid state\n");
 687                                                 return;
 688                                         }
 689                                         info(msg_button_cancel, p_slot->number);
 690                                         p_slot->state = STATIC_STATE;
 691                                 }
 692                                 /* ***********Button Pressed (No action on 1st press...) */
 693                                 else if (ctrl->event_queue[loop].event_type == INT_BUTTON_PRESS) {
 694
 695                                         if (ATTN_BUTTN(ctrl->ctrlcap)) {
 696                                                 dbg("Button pressed\n");
 697                                                 p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
 698                                                 if (getstatus) {
 699                                                         /* slot is on */
 700                                                         dbg("slot is on\n");
 701                                                         p_slot->state = BLINKINGOFF_STATE;
 702                                                         info(msg_button_off, p_slot->number);
 703                                                 } else {
 704                                                         /* slot is off */
 705                                                         dbg("slot is off\n");
 706                                                         p_slot->state = BLINKINGON_STATE;
 707                                                         info(msg_button_on, p_slot->number);
 708                                                 }
 709
 710                                                 /* Wait for exclusive access to hardware */
 711                                                 down(&ctrl->crit_sect);
 712
 713                                                 /* blink green LED and turn off amber */
 714                                                 if (PWR_LED(ctrl->ctrlcap)) {
 715                                                         p_slot->hpc_ops->green_led_blink(p_slot);
 716                                                         /* Wait for the command to complete */
 717                                                         wait_for_ctrl_irq (ctrl);
 718                                                 }
 719
 720                                                 if (ATTN_LED(ctrl->ctrlcap)) {
 721                                                         p_slot->hpc_ops->set_attention_status(p_slot, 0);
 722
 723                                                         /* Wait for the command to complete */
 724                                                         wait_for_ctrl_irq (ctrl);
 725                                                 }
 726
 727                                                 /* Done with exclusive hardware access */
 728                                                 up(&ctrl->crit_sect);
 729
 730                                                 init_timer(&p_slot->task_event);
 731                                                 p_slot->task_event.expires = jiffies + 5 * HZ;   /* 5 second delay */
 732                                                 p_slot->task_event.function = (void (*)(unsigned long)) pushbutton_helper_thread;
 733                                                 p_slot->task_event.data = (unsigned long) p_slot;
 734
 735                                                 dbg("add_timer p_slot = %p\n", (void *) p_slot);
 736                                                 add_timer(&p_slot->task_event);
 737                                         }
 738                                 }
 739                                 /***********POWER FAULT********************/
 740                                 else if (ctrl->event_queue[loop].event_type == INT_POWER_FAULT) {
 741                                         if (POWER_CTRL(ctrl->ctrlcap)) {
 742                                                 dbg("power fault\n");
 743                                                 /* Wait for exclusive access to hardware */
 744                                                 down(&ctrl->crit_sect);
 745
 746                                                 if (ATTN_LED(ctrl->ctrlcap)) {
 747                                                         p_slot->hpc_ops->set_attention_status(p_slot, 1);
 748                                                         wait_for_ctrl_irq (ctrl);
 749                                                 }
 750
 751                                                 if (PWR_LED(ctrl->ctrlcap)) {
 752                                                         p_slot->hpc_ops->green_led_off(p_slot);
 753                                                         wait_for_ctrl_irq (ctrl);
 754                                                 }
 755
 756                                                 /* Done with exclusive hardware access */
 757                                                 up(&ctrl->crit_sect);
 758                                         }
 759                                 }
 760                                 /***********SURPRISE REMOVAL********************/
 761                                 else if ((ctrl->event_queue[loop].event_type == INT_PRESENCE_ON) ||
 762                                         (ctrl->event_queue[loop].event_type == INT_PRESENCE_OFF)) {
 763                                         if (HP_SUPR_RM(ctrl->ctrlcap)) {
 764                                                 dbg("Surprise Removal\n");
 765                                                 if (p_slot) {
 766                                                         surprise_rm_pending = (unsigned long) p_slot;
 767                                                         up(&event_semaphore);
 768                                                         update_slot_info(p_slot);
 769                                                 }
 770                                         }
 771                                 } else {
 772                                         /* refresh notification */
 773                                         if (p_slot)
 774                                                 update_slot_info(p_slot);
 775                                 }
 776
 777                                 ctrl->event_queue[loop].event_type = 0;
 778
 779                                 change = 1;
 780                         }
 781                 }               /* End of FOR loop */
 782         }
 783 }
 784
 785
 786 int pciehp_enable_slot(struct slot *p_slot)
 787 {
 788         u8 getstatus = 0;
 789         int rc;
 790
 791         /* Check to see if (latch closed, card present, power off) */
 792         down(&p_slot->ctrl->crit_sect);
 793
 794         rc = p_slot->hpc_ops->get_adapter_status(p_slot, &getstatus);
 795         if (rc || !getstatus) {
 796                 info("%s: no adapter on slot(%x)\n", __FUNCTION__, p_slot->number);
 797                 up(&p_slot->ctrl->crit_sect);
 798                 return 1;
 799         }
 800         if (MRL_SENS(p_slot->ctrl->ctrlcap)) {
 801                 rc = p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
 802                 if (rc || getstatus) {
 803                         info("%s: latch open on slot(%x)\n", __FUNCTION__, p_slot->number);
 804                         up(&p_slot->ctrl->crit_sect);
 805                         return 1;
 806                 }
 807         }
 808
 809         if (POWER_CTRL(p_slot->ctrl->ctrlcap)) {
 810                 rc = p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
 811                 if (rc || getstatus) {
 812                         info("%s: already enabled on slot(%x)\n", __FUNCTION__, p_slot->number);
 813                         up(&p_slot->ctrl->crit_sect);
 814                         return 1;
 815                 }
 816         }
 817         up(&p_slot->ctrl->crit_sect);
 818
 819         p_slot->configured = 0;
 820         p_slot->is_a_board = 1;
 821
 822         /* We have to save the presence info for these slots */
 823         p_slot->hpc_ops->get_adapter_status(p_slot, &(p_slot->presence_save));
 824         p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
 825         p_slot->switch_save = !getstatus? 0x10:0;
 826
 827         rc = board_added(p_slot);
 828         if (rc) {
 829                 /* We have to save the presence info for these slots */
 830                 p_slot->hpc_ops->get_adapter_status(p_slot,
 831                                 &(p_slot->presence_save));
 832                 p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
 833                 p_slot->switch_save = !getstatus? 0x10:0;
 834         }
 835
 836         if (p_slot)
 837                 update_slot_info(p_slot);
 838
 839         return rc;
 840 }
 841
 842
 843 int pciehp_disable_slot(struct slot *p_slot)
 844 {
 845         u8 getstatus = 0;
 846         int ret = 0;
 847
 848         if (!p_slot->ctrl)
 849                 return 1;
 850
 851         /* Check to see if (latch closed, card present, power on) */
 852         down(&p_slot->ctrl->crit_sect);
 853
 854         if (!HP_SUPR_RM(p_slot->ctrl->ctrlcap)) {
 855                 ret = p_slot->hpc_ops->get_adapter_status(p_slot, &getstatus);
 856                 if (ret || !getstatus) {
 857                         info("%s: no adapter on slot(%x)\n", __FUNCTION__, p_slot->number);
 858                         up(&p_slot->ctrl->crit_sect);
 859                         return 1;
 860                 }
 861         }
 862
 863         if (MRL_SENS(p_slot->ctrl->ctrlcap)) {
 864                 ret = p_slot->hpc_ops->get_latch_status(p_slot, &getstatus);
 865                 if (ret || getstatus) {
 866                         info("%s: latch open on slot(%x)\n", __FUNCTION__, p_slot->number);
 867                         up(&p_slot->ctrl->crit_sect);
 868                         return 1;
 869                 }
 870         }
 871
 872         if (POWER_CTRL(p_slot->ctrl->ctrlcap)) {
 873                 ret = p_slot->hpc_ops->get_power_status(p_slot, &getstatus);
 874                 if (ret || !getstatus) {
 875                         info("%s: already disabled slot(%x)\n", __FUNCTION__, p_slot->number);
 876                         up(&p_slot->ctrl->crit_sect);
 877                         return 1;
 878                 }
 879         }
 880
 881         up(&p_slot->ctrl->crit_sect);
 882
 883         ret = remove_board(p_slot);
 884         update_slot_info(p_slot);
 885         return ret;
 886 }
 887