| /* |
| * PCI Express Hot Plug Controller Driver |
| * |
| * Copyright (C) 1995,2001 Compaq Computer Corporation |
| * Copyright (C) 2001 Greg Kroah-Hartman (greg@kroah.com) |
| * Copyright (C) 2001 IBM Corp. |
| * Copyright (C) 2003-2004 Intel Corporation |
| * |
| * All rights reserved. |
| * |
| * This program is free software; you can redistribute it and/or modify |
| * it under the terms of the GNU General Public License as published by |
| * the Free Software Foundation; either version 2 of the License, or (at |
| * your option) any later version. |
| * |
| * This program is distributed in the hope that it will be useful, but |
| * WITHOUT ANY WARRANTY; without even the implied warranty of |
| * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or |
| * NON INFRINGEMENT. See the GNU General Public License for more |
| * details. |
| * |
| * You should have received a copy of the GNU General Public License |
| * along with this program; if not, write to the Free Software |
| * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. |
| * |
| * Send feedback to <greg@kroah.com>, <kristen.c.accardi@intel.com> |
| * |
| */ |
| |
| #include <linux/module.h> |
| #include <linux/kernel.h> |
| #include <linux/types.h> |
| #include <linux/smp_lock.h> |
| #include <linux/pci.h> |
| #include "../pci.h" |
| #include "pciehp.h" |
| |
| static void interrupt_event_handler(struct controller *ctrl); |
| |
| static struct semaphore event_semaphore; /* mutex for process loop (up if something to process) */ |
| static struct semaphore event_exit; /* guard ensure thread has exited before calling it quits */ |
| static int event_finished; |
| static unsigned long pushbutton_pending; /* = 0 */ |
| static unsigned long surprise_rm_pending; /* = 0 */ |
| |
| u8 pciehp_handle_attention_button(u8 hp_slot, void *inst_id) |
| { |
| struct controller *ctrl = (struct controller *) inst_id; |
| struct slot *p_slot; |
| u8 rc = 0; |
| u8 getstatus; |
| struct event_info *taskInfo; |
| |
| /* Attention Button Change */ |
| dbg("pciehp: Attention button interrupt received.\n"); |
| |
| /* This is the structure that tells the worker thread what to do */ |
| taskInfo = &(ctrl->event_queue[ctrl->next_event]); |
| p_slot = pciehp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset); |
| |
| p_slot->hpc_ops->get_latch_status(p_slot, &getstatus); |
| |
| ctrl->next_event = (ctrl->next_event + 1) % MAX_EVENTS; |
| taskInfo->hp_slot = hp_slot; |
| |
| rc++; |
| |
| /* |
| * Button pressed - See if need to TAKE ACTION!!! |
| */ |
| info("Button pressed on Slot(%d)\n", ctrl->first_slot + hp_slot); |
| taskInfo->event_type = INT_BUTTON_PRESS; |
| |
| if ((p_slot->state == BLINKINGON_STATE) |
| || (p_slot->state == BLINKINGOFF_STATE)) { |
| /* Cancel if we are still blinking; this means that we press the |
| * attention again before the 5 sec. limit expires to cancel hot-add |
| * or hot-remove |
| */ |
| taskInfo->event_type = INT_BUTTON_CANCEL; |
| info("Button cancel on Slot(%d)\n", ctrl->first_slot + hp_slot); |
| } else if ((p_slot->state == POWERON_STATE) |
| || (p_slot->state == POWEROFF_STATE)) { |
| /* Ignore if the slot is on power-on or power-off state; this |
| * means that the previous attention button action to hot-add or |
| * hot-remove is undergoing |
| */ |
| taskInfo->event_type = INT_BUTTON_IGNORE; |
| info("Button ignore on Slot(%d)\n", ctrl->first_slot + hp_slot); |
| } |
| |
| if (rc) |
| up(&event_semaphore); /* signal event thread that new event is posted */ |
| |
| return 0; |
| |
| } |
| |
| u8 pciehp_handle_switch_change(u8 hp_slot, void *inst_id) |
| { |
| struct controller *ctrl = (struct controller *) inst_id; |
| struct slot *p_slot; |
| u8 rc = 0; |
| u8 getstatus; |
| struct event_info *taskInfo; |
| |
| /* Switch Change */ |
| dbg("pciehp: Switch interrupt received.\n"); |
| |
| /* This is the structure that tells the worker thread |
| * what to do |
| */ |
| taskInfo = &(ctrl->event_queue[ctrl->next_event]); |
| ctrl->next_event = (ctrl->next_event + 1) % MAX_EVENTS; |
| taskInfo->hp_slot = hp_slot; |
| |
| rc++; |
| p_slot = pciehp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset); |
| p_slot->hpc_ops->get_latch_status(p_slot, &getstatus); |
| |
| if (getstatus) { |
| /* |
| * Switch opened |
| */ |
| info("Latch open on Slot(%d)\n", ctrl->first_slot + hp_slot); |
| taskInfo->event_type = INT_SWITCH_OPEN; |
| } else { |
| /* |
| * Switch closed |
| */ |
| info("Latch close on Slot(%d)\n", ctrl->first_slot + hp_slot); |
| taskInfo->event_type = INT_SWITCH_CLOSE; |
| } |
| |
| if (rc) |
| up(&event_semaphore); /* signal event thread that new event is posted */ |
| |
| return rc; |
| } |
| |
| u8 pciehp_handle_presence_change(u8 hp_slot, void *inst_id) |
| { |
| struct controller *ctrl = (struct controller *) inst_id; |
| struct slot *p_slot; |
| u8 presence_save, rc = 0; |
| struct event_info *taskInfo; |
| |
| /* Presence Change */ |
| dbg("pciehp: Presence/Notify input change.\n"); |
| |
| /* This is the structure that tells the worker thread |
| * what to do |
| */ |
| taskInfo = &(ctrl->event_queue[ctrl->next_event]); |
| ctrl->next_event = (ctrl->next_event + 1) % MAX_EVENTS; |
| taskInfo->hp_slot = hp_slot; |
| |
| rc++; |
| p_slot = pciehp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset); |
| |
| /* Switch is open, assume a presence change |
| * Save the presence state |
| */ |
| p_slot->hpc_ops->get_adapter_status(p_slot, &presence_save); |
| if (presence_save) { |
| /* |
| * Card Present |
| */ |
| info("Card present on Slot(%d)\n", ctrl->first_slot + hp_slot); |
| taskInfo->event_type = INT_PRESENCE_ON; |
| } else { |
| /* |
| * Not Present |
| */ |
| info("Card not present on Slot(%d)\n", ctrl->first_slot + hp_slot); |
| taskInfo->event_type = INT_PRESENCE_OFF; |
| } |
| |
| if (rc) |
| up(&event_semaphore); /* signal event thread that new event is posted */ |
| |
| return rc; |
| } |
| |
| u8 pciehp_handle_power_fault(u8 hp_slot, void *inst_id) |
| { |
| struct controller *ctrl = (struct controller *) inst_id; |
| struct slot *p_slot; |
| u8 rc = 0; |
| struct event_info *taskInfo; |
| |
| /* power fault */ |
| dbg("pciehp: Power fault interrupt received.\n"); |
| |
| /* this is the structure that tells the worker thread |
| * what to do |
| */ |
| taskInfo = &(ctrl->event_queue[ctrl->next_event]); |
| ctrl->next_event = (ctrl->next_event + 1) % MAX_EVENTS; |
| taskInfo->hp_slot = hp_slot; |
| |
| rc++; |
| p_slot = pciehp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset); |
| |
| if ( !(p_slot->hpc_ops->query_power_fault(p_slot))) { |
| /* |
| * power fault Cleared |
| */ |
| info("Power fault cleared on Slot(%d)\n", ctrl->first_slot + hp_slot); |
| taskInfo->event_type = INT_POWER_FAULT_CLEAR; |
| } else { |
| /* |
| * power fault |
| */ |
| info("Power fault on Slot(%d)\n", ctrl->first_slot + hp_slot); |
| taskInfo->event_type = INT_POWER_FAULT; |
| info("power fault bit %x set\n", hp_slot); |
| } |
| if (rc) |
| up(&event_semaphore); /* signal event thread that new event is posted */ |
| |
| return rc; |
| } |
| |
| /* The following routines constitute the bulk of the |
| hotplug controller logic |
| */ |
| |
| static void set_slot_off(struct controller *ctrl, struct slot * pslot) |
| { |
| /* Wait for exclusive access to hardware */ |
| down(&ctrl->crit_sect); |
| |
| /* turn off slot, turn on Amber LED, turn off Green LED if supported*/ |
| if (POWER_CTRL(ctrl->ctrlcap)) { |
| if (pslot->hpc_ops->power_off_slot(pslot)) { |
| err("%s: Issue of Slot Power Off command failed\n", __FUNCTION__); |
| up(&ctrl->crit_sect); |
| return; |
| } |
| wait_for_ctrl_irq (ctrl); |
| } |
| |
| if (PWR_LED(ctrl->ctrlcap)) { |
| pslot->hpc_ops->green_led_off(pslot); |
| wait_for_ctrl_irq (ctrl); |
| } |
| |
| if (ATTN_LED(ctrl->ctrlcap)) { |
| if (pslot->hpc_ops->set_attention_status(pslot, 1)) { |
| err("%s: Issue of Set Attention Led command failed\n", __FUNCTION__); |
| up(&ctrl->crit_sect); |
| return; |
| } |
| wait_for_ctrl_irq (ctrl); |
| } |
| |
| /* Done with exclusive hardware access */ |
| up(&ctrl->crit_sect); |
| } |
| |
| /** |
| * board_added - Called after a board has been added to the system. |
| * |
| * Turns power on for the board |
| * Configures board |
| * |
| */ |
| static int board_added(struct slot *p_slot) |
| { |
| u8 hp_slot; |
| int rc = 0; |
| struct controller *ctrl = p_slot->ctrl; |
| |
| hp_slot = p_slot->device - ctrl->slot_device_offset; |
| |
| dbg("%s: slot device, slot offset, hp slot = %d, %d ,%d\n", |
| __FUNCTION__, p_slot->device, |
| ctrl->slot_device_offset, hp_slot); |
| |
| /* Wait for exclusive access to hardware */ |
| down(&ctrl->crit_sect); |
| |
| if (POWER_CTRL(ctrl->ctrlcap)) { |
| /* Power on slot */ |
| rc = p_slot->hpc_ops->power_on_slot(p_slot); |
| if (rc) { |
| up(&ctrl->crit_sect); |
| return -1; |
| } |
| |
| /* Wait for the command to complete */ |
| wait_for_ctrl_irq (ctrl); |
| } |
| |
| if (PWR_LED(ctrl->ctrlcap)) { |
| p_slot->hpc_ops->green_led_blink(p_slot); |
| |
| /* Wait for the command to complete */ |
| wait_for_ctrl_irq (ctrl); |
| } |
| |
| /* Done with exclusive hardware access */ |
| up(&ctrl->crit_sect); |
| |
| /* Wait for ~1 second */ |
| wait_for_ctrl_irq (ctrl); |
| |
| /* Check link training status */ |
| rc = p_slot->hpc_ops->check_lnk_status(ctrl); |
| if (rc) { |
| err("%s: Failed to check link status\n", __FUNCTION__); |
| set_slot_off(ctrl, p_slot); |
| return rc; |
| } |
| |
| /* Check for a power fault */ |
| if (p_slot->hpc_ops->query_power_fault(p_slot)) { |
| dbg("%s: power fault detected\n", __FUNCTION__); |
| rc = POWER_FAILURE; |
| goto err_exit; |
| } |
| |
| rc = pciehp_configure_device(p_slot); |
| if (rc) { |
| err("Cannot add device 0x%x:%x\n", p_slot->bus, |
| p_slot->device); |
| goto err_exit; |
| } |
| |
| /* |
| * Some PCI Express root ports require fixup after hot-plug operation. |
| */ |
| if (pcie_mch_quirk) |
| pci_fixup_device(pci_fixup_final, ctrl->pci_dev); |
| if (PWR_LED(ctrl->ctrlcap)) { |
| /* Wait for exclusive access to hardware */ |
| down(&ctrl->crit_sect); |
| |
| p_slot->hpc_ops->green_led_on(p_slot); |
| |
| /* Wait for the command to complete */ |
| wait_for_ctrl_irq (ctrl); |
| |
| /* Done with exclusive hardware access */ |
| up(&ctrl->crit_sect); |
| } |
| return 0; |
| |
| err_exit: |
| set_slot_off(ctrl, p_slot); |
| return -1; |
| } |
| |
| |
| /** |
| * remove_board - Turns off slot and LED's |
| * |
| */ |
| static int remove_board(struct slot *p_slot) |
| { |
| u8 device; |
| u8 hp_slot; |
| int rc; |
| struct controller *ctrl = p_slot->ctrl; |
| |
| if (pciehp_unconfigure_device(p_slot)) |
| return 1; |
| |
| device = p_slot->device; |
| |
| hp_slot = p_slot->device - ctrl->slot_device_offset; |
| p_slot = pciehp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset); |
| |
| dbg("In %s, hp_slot = %d\n", __FUNCTION__, hp_slot); |
| |
| /* Wait for exclusive access to hardware */ |
| down(&ctrl->crit_sect); |
| |
| if (POWER_CTRL(ctrl->ctrlcap)) { |
| /* power off slot */ |
| rc = p_slot->hpc_ops->power_off_slot(p_slot); |
| if (rc) { |
| err("%s: Issue of Slot Disable command failed\n", __FUNCTION__); |
| up(&ctrl->crit_sect); |
| return rc; |
| } |
| /* Wait for the command to complete */ |
| wait_for_ctrl_irq (ctrl); |
| } |
| |
| if (PWR_LED(ctrl->ctrlcap)) { |
| /* turn off Green LED */ |
| p_slot->hpc_ops->green_led_off(p_slot); |
| |
| /* Wait for the command to complete */ |
| wait_for_ctrl_irq (ctrl); |
| } |
| |
| /* Done with exclusive hardware access */ |
| up(&ctrl->crit_sect); |
| |
| return 0; |
| } |
| |
| |
| static void pushbutton_helper_thread(unsigned long data) |
| { |
| pushbutton_pending = data; |
| |
| up(&event_semaphore); |
| } |
| |
| /** |
| * pciehp_pushbutton_thread |
| * |
| * Scheduled procedure to handle blocking stuff for the pushbuttons |
| * Handles all pending events and exits. |
| * |
| */ |
| static void pciehp_pushbutton_thread(unsigned long slot) |
| { |
| struct slot *p_slot = (struct slot *) slot; |
| u8 getstatus; |
| |
| pushbutton_pending = 0; |
| |
| if (!p_slot) { |
| dbg("%s: Error! slot NULL\n", __FUNCTION__); |
| return; |
| } |
| |
| p_slot->hpc_ops->get_power_status(p_slot, &getstatus); |
| if (getstatus) { |
| p_slot->state = POWEROFF_STATE; |
| dbg("%s: disabling bus:device(%x:%x)\n", __FUNCTION__, |
| p_slot->bus, p_slot->device); |
| |
| pciehp_disable_slot(p_slot); |
| p_slot->state = STATIC_STATE; |
| } else { |
| p_slot->state = POWERON_STATE; |
| dbg("%s: adding bus:device(%x:%x)\n", __FUNCTION__, |
| p_slot->bus, p_slot->device); |
| |
| if (pciehp_enable_slot(p_slot) && PWR_LED(p_slot->ctrl->ctrlcap)) { |
| /* Wait for exclusive access to hardware */ |
| down(&p_slot->ctrl->crit_sect); |
| |
| p_slot->hpc_ops->green_led_off(p_slot); |
| |
| /* Wait for the command to complete */ |
| wait_for_ctrl_irq (p_slot->ctrl); |
| |
| /* Done with exclusive hardware access */ |
| up(&p_slot->ctrl->crit_sect); |
| } |
| p_slot->state = STATIC_STATE; |
| } |
| |
| return; |
| } |
| |
| /** |
| * pciehp_surprise_rm_thread |
| * |
| * Scheduled procedure to handle blocking stuff for the surprise removal |
| * Handles all pending events and exits. |
| * |
| */ |
| static void pciehp_surprise_rm_thread(unsigned long slot) |
| { |
| struct slot *p_slot = (struct slot *) slot; |
| u8 getstatus; |
| |
| surprise_rm_pending = 0; |
| |
| if (!p_slot) { |
| dbg("%s: Error! slot NULL\n", __FUNCTION__); |
| return; |
| } |
| |
| p_slot->hpc_ops->get_adapter_status(p_slot, &getstatus); |
| if (!getstatus) { |
| p_slot->state = POWEROFF_STATE; |
| dbg("%s: removing bus:device(%x:%x)\n", |
| __FUNCTION__, p_slot->bus, p_slot->device); |
| |
| pciehp_disable_slot(p_slot); |
| p_slot->state = STATIC_STATE; |
| } else { |
| p_slot->state = POWERON_STATE; |
| dbg("%s: adding bus:device(%x:%x)\n", |
| __FUNCTION__, p_slot->bus, p_slot->device); |
| |
| if (pciehp_enable_slot(p_slot) && PWR_LED(p_slot->ctrl->ctrlcap)) { |
| /* Wait for exclusive access to hardware */ |
| down(&p_slot->ctrl->crit_sect); |
| |
| p_slot->hpc_ops->green_led_off(p_slot); |
| |
| /* Wait for the command to complete */ |
| wait_for_ctrl_irq (p_slot->ctrl); |
| |
| /* Done with exclusive hardware access */ |
| up(&p_slot->ctrl->crit_sect); |
| } |
| p_slot->state = STATIC_STATE; |
| } |
| |
| return; |
| } |
| |
| |
| |
| /* this is the main worker thread */ |
| static int event_thread(void* data) |
| { |
| struct controller *ctrl; |
| lock_kernel(); |
| daemonize("pciehpd_event"); |
| |
| unlock_kernel(); |
| |
| while (1) { |
| dbg("!!!!event_thread sleeping\n"); |
| down_interruptible (&event_semaphore); |
| dbg("event_thread woken finished = %d\n", event_finished); |
| if (event_finished || signal_pending(current)) |
| break; |
| /* Do stuff here */ |
| if (pushbutton_pending) |
| pciehp_pushbutton_thread(pushbutton_pending); |
| else if (surprise_rm_pending) |
| pciehp_surprise_rm_thread(surprise_rm_pending); |
| else |
| for (ctrl = pciehp_ctrl_list; ctrl; ctrl=ctrl->next) |
| interrupt_event_handler(ctrl); |
| } |
| dbg("event_thread signals exit\n"); |
| up(&event_exit); |
| return 0; |
| } |
| |
| int pciehp_event_start_thread(void) |
| { |
| int pid; |
| |
| /* initialize our semaphores */ |
| init_MUTEX_LOCKED(&event_exit); |
| event_finished=0; |
| |
| init_MUTEX_LOCKED(&event_semaphore); |
| pid = kernel_thread(event_thread, NULL, 0); |
| |
| if (pid < 0) { |
| err ("Can't start up our event thread\n"); |
| return -1; |
| } |
| return 0; |
| } |
| |
| |
| void pciehp_event_stop_thread(void) |
| { |
| event_finished = 1; |
| up(&event_semaphore); |
| down(&event_exit); |
| } |
| |
| |
| static int update_slot_info(struct slot *slot) |
| { |
| struct hotplug_slot_info *info; |
| /* char buffer[SLOT_NAME_SIZE]; */ |
| int result; |
| |
| info = kmalloc(sizeof(struct hotplug_slot_info), GFP_KERNEL); |
| if (!info) |
| return -ENOMEM; |
| |
| /* make_slot_name (&buffer[0], SLOT_NAME_SIZE, slot); */ |
| |
| slot->hpc_ops->get_power_status(slot, &(info->power_status)); |
| slot->hpc_ops->get_attention_status(slot, &(info->attention_status)); |
| slot->hpc_ops->get_latch_status(slot, &(info->latch_status)); |
| slot->hpc_ops->get_adapter_status(slot, &(info->adapter_status)); |
| |
| /* result = pci_hp_change_slot_info(buffer, info); */ |
| result = pci_hp_change_slot_info(slot->hotplug_slot, info); |
| kfree (info); |
| return result; |
| } |
| |
| static void interrupt_event_handler(struct controller *ctrl) |
| { |
| int loop = 0; |
| int change = 1; |
| u8 hp_slot; |
| u8 getstatus; |
| struct slot *p_slot; |
| |
| while (change) { |
| change = 0; |
| |
| for (loop = 0; loop < MAX_EVENTS; loop++) { |
| if (ctrl->event_queue[loop].event_type != 0) { |
| hp_slot = ctrl->event_queue[loop].hp_slot; |
| |
| p_slot = pciehp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset); |
| |
| if (ctrl->event_queue[loop].event_type == INT_BUTTON_CANCEL) { |
| dbg("button cancel\n"); |
| del_timer(&p_slot->task_event); |
| |
| switch (p_slot->state) { |
| case BLINKINGOFF_STATE: |
| /* Wait for exclusive access to hardware */ |
| down(&ctrl->crit_sect); |
| |
| if (PWR_LED(ctrl->ctrlcap)) { |
| p_slot->hpc_ops->green_led_on(p_slot); |
| /* Wait for the command to complete */ |
| wait_for_ctrl_irq (ctrl); |
| } |
| if (ATTN_LED(ctrl->ctrlcap)) { |
| p_slot->hpc_ops->set_attention_status(p_slot, 0); |
| |
| /* Wait for the command to complete */ |
| wait_for_ctrl_irq (ctrl); |
| } |
| /* Done with exclusive hardware access */ |
| up(&ctrl->crit_sect); |
| break; |
| case BLINKINGON_STATE: |
| /* Wait for exclusive access to hardware */ |
| down(&ctrl->crit_sect); |
| |
| if (PWR_LED(ctrl->ctrlcap)) { |
| p_slot->hpc_ops->green_led_off(p_slot); |
| /* Wait for the command to complete */ |
| wait_for_ctrl_irq (ctrl); |
| } |
| if (ATTN_LED(ctrl->ctrlcap)){ |
| p_slot->hpc_ops->set_attention_status(p_slot, 0); |
| /* Wait for the command to complete */ |
| wait_for_ctrl_irq (ctrl); |
| } |
| /* Done with exclusive hardware access */ |
| up(&ctrl->crit_sect); |
| |
| break; |
| default: |
| warn("Not a valid state\n"); |
| return; |
| } |
| info(msg_button_cancel, p_slot->number); |
| p_slot->state = STATIC_STATE; |
| } |
| /* ***********Button Pressed (No action on 1st press...) */ |
| else if (ctrl->event_queue[loop].event_type == INT_BUTTON_PRESS) { |
| |
| if (ATTN_BUTTN(ctrl->ctrlcap)) { |
| dbg("Button pressed\n"); |
| p_slot->hpc_ops->get_power_status(p_slot, &getstatus); |
| if (getstatus) { |
| /* slot is on */ |
| dbg("slot is on\n"); |
| p_slot->state = BLINKINGOFF_STATE; |
| info(msg_button_off, p_slot->number); |
| } else { |
| /* slot is off */ |
| dbg("slot is off\n"); |
| p_slot->state = BLINKINGON_STATE; |
| info(msg_button_on, p_slot->number); |
| } |
| |
| /* Wait for exclusive access to hardware */ |
| down(&ctrl->crit_sect); |
| |
| /* blink green LED and turn off amber */ |
| if (PWR_LED(ctrl->ctrlcap)) { |
| p_slot->hpc_ops->green_led_blink(p_slot); |
| /* Wait for the command to complete */ |
| wait_for_ctrl_irq (ctrl); |
| } |
| |
| if (ATTN_LED(ctrl->ctrlcap)) { |
| p_slot->hpc_ops->set_attention_status(p_slot, 0); |
| |
| /* Wait for the command to complete */ |
| wait_for_ctrl_irq (ctrl); |
| } |
| |
| /* Done with exclusive hardware access */ |
| up(&ctrl->crit_sect); |
| |
| init_timer(&p_slot->task_event); |
| p_slot->task_event.expires = jiffies + 5 * HZ; /* 5 second delay */ |
| p_slot->task_event.function = (void (*)(unsigned long)) pushbutton_helper_thread; |
| p_slot->task_event.data = (unsigned long) p_slot; |
| |
| add_timer(&p_slot->task_event); |
| } |
| } |
| /***********POWER FAULT********************/ |
| else if (ctrl->event_queue[loop].event_type == INT_POWER_FAULT) { |
| if (POWER_CTRL(ctrl->ctrlcap)) { |
| dbg("power fault\n"); |
| /* Wait for exclusive access to hardware */ |
| down(&ctrl->crit_sect); |
| |
| if (ATTN_LED(ctrl->ctrlcap)) { |
| p_slot->hpc_ops->set_attention_status(p_slot, 1); |
| wait_for_ctrl_irq (ctrl); |
| } |
| |
| if (PWR_LED(ctrl->ctrlcap)) { |
| p_slot->hpc_ops->green_led_off(p_slot); |
| wait_for_ctrl_irq (ctrl); |
| } |
| |
| /* Done with exclusive hardware access */ |
| up(&ctrl->crit_sect); |
| } |
| } |
| /***********SURPRISE REMOVAL********************/ |
| else if ((ctrl->event_queue[loop].event_type == INT_PRESENCE_ON) || |
| (ctrl->event_queue[loop].event_type == INT_PRESENCE_OFF)) { |
| if (HP_SUPR_RM(ctrl->ctrlcap)) { |
| dbg("Surprise Removal\n"); |
| if (p_slot) { |
| surprise_rm_pending = (unsigned long) p_slot; |
| up(&event_semaphore); |
| update_slot_info(p_slot); |
| } |
| } |
| } else { |
| /* refresh notification */ |
| if (p_slot) |
| update_slot_info(p_slot); |
| } |
| |
| ctrl->event_queue[loop].event_type = 0; |
| |
| change = 1; |
| } |
| } /* End of FOR loop */ |
| } |
| } |
| |
| |
| int pciehp_enable_slot(struct slot *p_slot) |
| { |
| u8 getstatus = 0; |
| int rc; |
| |
| /* Check to see if (latch closed, card present, power off) */ |
| down(&p_slot->ctrl->crit_sect); |
| |
| rc = p_slot->hpc_ops->get_adapter_status(p_slot, &getstatus); |
| if (rc || !getstatus) { |
| info("%s: no adapter on slot(%x)\n", __FUNCTION__, p_slot->number); |
| up(&p_slot->ctrl->crit_sect); |
| return 1; |
| } |
| if (MRL_SENS(p_slot->ctrl->ctrlcap)) { |
| rc = p_slot->hpc_ops->get_latch_status(p_slot, &getstatus); |
| if (rc || getstatus) { |
| info("%s: latch open on slot(%x)\n", __FUNCTION__, p_slot->number); |
| up(&p_slot->ctrl->crit_sect); |
| return 1; |
| } |
| } |
| |
| if (POWER_CTRL(p_slot->ctrl->ctrlcap)) { |
| rc = p_slot->hpc_ops->get_power_status(p_slot, &getstatus); |
| if (rc || getstatus) { |
| info("%s: already enabled on slot(%x)\n", __FUNCTION__, p_slot->number); |
| up(&p_slot->ctrl->crit_sect); |
| return 1; |
| } |
| } |
| up(&p_slot->ctrl->crit_sect); |
| |
| p_slot->hpc_ops->get_latch_status(p_slot, &getstatus); |
| |
| rc = board_added(p_slot); |
| if (rc) { |
| p_slot->hpc_ops->get_latch_status(p_slot, &getstatus); |
| } |
| |
| if (p_slot) |
| update_slot_info(p_slot); |
| |
| return rc; |
| } |
| |
| |
| int pciehp_disable_slot(struct slot *p_slot) |
| { |
| u8 getstatus = 0; |
| int ret = 0; |
| |
| if (!p_slot->ctrl) |
| return 1; |
| |
| /* Check to see if (latch closed, card present, power on) */ |
| down(&p_slot->ctrl->crit_sect); |
| |
| if (!HP_SUPR_RM(p_slot->ctrl->ctrlcap)) { |
| ret = p_slot->hpc_ops->get_adapter_status(p_slot, &getstatus); |
| if (ret || !getstatus) { |
| info("%s: no adapter on slot(%x)\n", __FUNCTION__, p_slot->number); |
| up(&p_slot->ctrl->crit_sect); |
| return 1; |
| } |
| } |
| |
| if (MRL_SENS(p_slot->ctrl->ctrlcap)) { |
| ret = p_slot->hpc_ops->get_latch_status(p_slot, &getstatus); |
| if (ret || getstatus) { |
| info("%s: latch open on slot(%x)\n", __FUNCTION__, p_slot->number); |
| up(&p_slot->ctrl->crit_sect); |
| return 1; |
| } |
| } |
| |
| if (POWER_CTRL(p_slot->ctrl->ctrlcap)) { |
| ret = p_slot->hpc_ops->get_power_status(p_slot, &getstatus); |
| if (ret || !getstatus) { |
| info("%s: already disabled slot(%x)\n", __FUNCTION__, p_slot->number); |
| up(&p_slot->ctrl->crit_sect); |
| return 1; |
| } |
| } |
| |
| up(&p_slot->ctrl->crit_sect); |
| |
| ret = remove_board(p_slot); |
| update_slot_info(p_slot); |
| return ret; |
| } |
| |