| /* |
| * Standard 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 "shpchp.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 */ |
| |
| u8 shpchp_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("shpchp: 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 = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset); |
| |
| p_slot->hpc_ops->get_adapter_status(p_slot, &(p_slot->presence_save)); |
| p_slot->hpc_ops->get_latch_status(p_slot, &getstatus); |
| |
| ctrl->next_event = (ctrl->next_event + 1) % 10; |
| 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 shpchp_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("shpchp: 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) % 10; |
| taskInfo->hp_slot = hp_slot; |
| |
| rc++; |
| p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset); |
| p_slot->hpc_ops->get_adapter_status(p_slot, &(p_slot->presence_save)); |
| p_slot->hpc_ops->get_latch_status(p_slot, &getstatus); |
| dbg("%s: Card present %x Power status %x\n", __FUNCTION__, |
| p_slot->presence_save, p_slot->pwr_save); |
| |
| if (getstatus) { |
| /* |
| * Switch opened |
| */ |
| info("Latch open on Slot(%d)\n", ctrl->first_slot + hp_slot); |
| taskInfo->event_type = INT_SWITCH_OPEN; |
| if (p_slot->pwr_save && p_slot->presence_save) { |
| taskInfo->event_type = INT_POWER_FAULT; |
| err("Surprise Removal of card\n"); |
| } |
| } 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 shpchp_handle_presence_change(u8 hp_slot, void *inst_id) |
| { |
| struct controller *ctrl = (struct controller *) inst_id; |
| struct slot *p_slot; |
| u8 rc = 0; |
| /*u8 temp_byte;*/ |
| struct event_info *taskInfo; |
| |
| /* Presence Change */ |
| dbg("shpchp: 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) % 10; |
| taskInfo->hp_slot = hp_slot; |
| |
| rc++; |
| p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset); |
| |
| /* |
| * Save the presence state |
| */ |
| p_slot->hpc_ops->get_adapter_status(p_slot, &(p_slot->presence_save)); |
| if (p_slot->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 shpchp_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("shpchp: 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) % 10; |
| taskInfo->hp_slot = hp_slot; |
| |
| rc++; |
| p_slot = shpchp_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); |
| p_slot->status = 0x00; |
| 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; |
| /* set power fault status for this board */ |
| p_slot->status = 0xFF; |
| 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 int change_bus_speed(struct controller *ctrl, struct slot *p_slot, |
| enum pci_bus_speed speed) |
| { |
| int rc = 0; |
| |
| dbg("%s: change to speed %d\n", __FUNCTION__, speed); |
| down(&ctrl->crit_sect); |
| if ((rc = p_slot->hpc_ops->set_bus_speed_mode(p_slot, speed))) { |
| err("%s: Issue of set bus speed mode command failed\n", __FUNCTION__); |
| up(&ctrl->crit_sect); |
| return WRONG_BUS_FREQUENCY; |
| } |
| wait_for_ctrl_irq (ctrl); |
| |
| if ((rc = p_slot->hpc_ops->check_cmd_status(ctrl))) { |
| err("%s: Can't set bus speed/mode in the case of adapter & bus mismatch\n", |
| __FUNCTION__); |
| err("%s: Error code (%d)\n", __FUNCTION__, rc); |
| up(&ctrl->crit_sect); |
| return WRONG_BUS_FREQUENCY; |
| } |
| up(&ctrl->crit_sect); |
| return rc; |
| } |
| |
| static int fix_bus_speed(struct controller *ctrl, struct slot *pslot, |
| u8 flag, enum pci_bus_speed asp, enum pci_bus_speed bsp, |
| enum pci_bus_speed msp) |
| { |
| int rc = 0; |
| |
| if (flag != 0) { /* Other slots on the same bus are occupied */ |
| if ( asp < bsp ) { |
| err("%s: speed of bus %x and adapter %x mismatch\n", __FUNCTION__, bsp, asp); |
| return WRONG_BUS_FREQUENCY; |
| } |
| } else { |
| /* Other slots on the same bus are empty */ |
| if (msp == bsp) { |
| /* if adapter_speed >= bus_speed, do nothing */ |
| if (asp < bsp) { |
| /* |
| * Try to lower bus speed to accommodate the adapter if other slots |
| * on the same controller are empty |
| */ |
| if ((rc = change_bus_speed(ctrl, pslot, asp))) |
| return rc; |
| } |
| } else { |
| if (asp < msp) { |
| if ((rc = change_bus_speed(ctrl, pslot, asp))) |
| return rc; |
| } else { |
| if ((rc = change_bus_speed(ctrl, pslot, msp))) |
| return rc; |
| } |
| } |
| } |
| return rc; |
| } |
| |
| /** |
| * 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; |
| u8 slots_not_empty = 0; |
| int rc = 0; |
| enum pci_bus_speed adapter_speed, bus_speed, max_bus_speed; |
| u8 pi, mode; |
| struct controller *ctrl = p_slot->ctrl; |
| |
| hp_slot = p_slot->device - ctrl->slot_device_offset; |
| |
| dbg("%s: p_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); |
| |
| /* Power on slot without connecting to bus */ |
| rc = p_slot->hpc_ops->power_on_slot(p_slot); |
| if (rc) { |
| err("%s: Failed to power on slot\n", __FUNCTION__); |
| /* Done with exclusive hardware access */ |
| up(&ctrl->crit_sect); |
| return -1; |
| } |
| |
| /* Wait for the command to complete */ |
| wait_for_ctrl_irq (ctrl); |
| |
| rc = p_slot->hpc_ops->check_cmd_status(ctrl); |
| if (rc) { |
| err("%s: Failed to power on slot, error code(%d)\n", __FUNCTION__, rc); |
| /* Done with exclusive hardware access */ |
| up(&ctrl->crit_sect); |
| return -1; |
| } |
| |
| |
| if ((ctrl->pci_dev->vendor == 0x8086) && (ctrl->pci_dev->device == 0x0332)) { |
| if (slots_not_empty) |
| return WRONG_BUS_FREQUENCY; |
| |
| if ((rc = p_slot->hpc_ops->set_bus_speed_mode(p_slot, PCI_SPEED_33MHz))) { |
| err("%s: Issue of set bus speed mode command failed\n", __FUNCTION__); |
| up(&ctrl->crit_sect); |
| return WRONG_BUS_FREQUENCY; |
| } |
| wait_for_ctrl_irq (ctrl); |
| |
| if ((rc = p_slot->hpc_ops->check_cmd_status(ctrl))) { |
| err("%s: Can't set bus speed/mode in the case of adapter & bus mismatch\n", |
| __FUNCTION__); |
| err("%s: Error code (%d)\n", __FUNCTION__, rc); |
| up(&ctrl->crit_sect); |
| return WRONG_BUS_FREQUENCY; |
| } |
| /* turn on board, blink green LED, turn off Amber LED */ |
| if ((rc = p_slot->hpc_ops->slot_enable(p_slot))) { |
| err("%s: Issue of Slot Enable command failed\n", __FUNCTION__); |
| up(&ctrl->crit_sect); |
| return rc; |
| } |
| wait_for_ctrl_irq (ctrl); |
| |
| if ((rc = p_slot->hpc_ops->check_cmd_status(ctrl))) { |
| err("%s: Failed to enable slot, error code(%d)\n", __FUNCTION__, rc); |
| up(&ctrl->crit_sect); |
| return rc; |
| } |
| } |
| |
| rc = p_slot->hpc_ops->get_adapter_speed(p_slot, &adapter_speed); |
| /* 0 = PCI 33Mhz, 1 = PCI 66 Mhz, 2 = PCI-X 66 PA, 4 = PCI-X 66 ECC, */ |
| /* 5 = PCI-X 133 PA, 7 = PCI-X 133 ECC, 0xa = PCI-X 133 Mhz 266, */ |
| /* 0xd = PCI-X 133 Mhz 533 */ |
| /* This encoding is different from the one used in cur_bus_speed & */ |
| /* max_bus_speed */ |
| |
| if (rc || adapter_speed == PCI_SPEED_UNKNOWN) { |
| err("%s: Can't get adapter speed or bus mode mismatch\n", __FUNCTION__); |
| /* Done with exclusive hardware access */ |
| up(&ctrl->crit_sect); |
| return WRONG_BUS_FREQUENCY; |
| } |
| |
| rc = p_slot->hpc_ops->get_cur_bus_speed(p_slot, &bus_speed); |
| if (rc || bus_speed == PCI_SPEED_UNKNOWN) { |
| err("%s: Can't get bus operation speed\n", __FUNCTION__); |
| /* Done with exclusive hardware access */ |
| up(&ctrl->crit_sect); |
| return WRONG_BUS_FREQUENCY; |
| } |
| |
| rc = p_slot->hpc_ops->get_max_bus_speed(p_slot, &max_bus_speed); |
| if (rc || max_bus_speed == PCI_SPEED_UNKNOWN) { |
| err("%s: Can't get max bus operation speed\n", __FUNCTION__); |
| max_bus_speed = bus_speed; |
| } |
| |
| /* Done with exclusive hardware access */ |
| up(&ctrl->crit_sect); |
| |
| if ((rc = p_slot->hpc_ops->get_prog_int(p_slot, &pi))) { |
| err("%s: Can't get controller programming interface, set it to 1\n", __FUNCTION__); |
| pi = 1; |
| } |
| |
| /* Check if there are other slots or devices on the same bus */ |
| if (!list_empty(&ctrl->pci_dev->subordinate->devices)) |
| slots_not_empty = 1; |
| |
| dbg("%s: slots_not_empty %d, pi %d\n", __FUNCTION__, |
| slots_not_empty, pi); |
| dbg("adapter_speed %d, bus_speed %d, max_bus_speed %d\n", |
| adapter_speed, bus_speed, max_bus_speed); |
| |
| if (pi == 2) { |
| dbg("%s: In PI = %d\n", __FUNCTION__, pi); |
| if ((rc = p_slot->hpc_ops->get_mode1_ECC_cap(p_slot, &mode))) { |
| err("%s: Can't get Mode1_ECC, set mode to 0\n", __FUNCTION__); |
| mode = 0; |
| } |
| |
| switch (adapter_speed) { |
| case PCI_SPEED_133MHz_PCIX_533: |
| case PCI_SPEED_133MHz_PCIX_266: |
| if ((bus_speed != adapter_speed) && |
| ((rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, adapter_speed, bus_speed, max_bus_speed)))) |
| return rc; |
| break; |
| case PCI_SPEED_133MHz_PCIX_ECC: |
| case PCI_SPEED_133MHz_PCIX: |
| if (mode) { /* Bus - Mode 1 ECC */ |
| if ((bus_speed != 0x7) && |
| ((rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, adapter_speed, bus_speed, max_bus_speed)))) |
| return rc; |
| } else { |
| if ((bus_speed != 0x4) && |
| ((rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, adapter_speed, bus_speed, max_bus_speed)))) |
| return rc; |
| } |
| break; |
| case PCI_SPEED_66MHz_PCIX_ECC: |
| case PCI_SPEED_66MHz_PCIX: |
| if (mode) { /* Bus - Mode 1 ECC */ |
| if ((bus_speed != 0x5) && |
| ((rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, adapter_speed, bus_speed, max_bus_speed)))) |
| return rc; |
| } else { |
| if ((bus_speed != 0x2) && |
| ((rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, adapter_speed, bus_speed, max_bus_speed)))) |
| return rc; |
| } |
| break; |
| case PCI_SPEED_66MHz: |
| if ((bus_speed != 0x1) && |
| ((rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, adapter_speed, bus_speed, max_bus_speed)))) |
| return rc; |
| break; |
| case PCI_SPEED_33MHz: |
| if (bus_speed > 0x0) { |
| if (slots_not_empty == 0) { |
| if ((rc = change_bus_speed(ctrl, p_slot, adapter_speed))) |
| return rc; |
| } else { |
| err("%s: speed of bus %x and adapter %x mismatch\n", __FUNCTION__, bus_speed, adapter_speed); |
| return WRONG_BUS_FREQUENCY; |
| } |
| } |
| break; |
| default: |
| err("%s: speed of bus %x and adapter %x mismatch\n", __FUNCTION__, bus_speed, adapter_speed); |
| return WRONG_BUS_FREQUENCY; |
| } |
| } else { |
| /* If adpater_speed == bus_speed, nothing to do here */ |
| dbg("%s: In PI = %d\n", __FUNCTION__, pi); |
| if ((adapter_speed != bus_speed) && |
| ((rc = fix_bus_speed(ctrl, p_slot, slots_not_empty, adapter_speed, bus_speed, max_bus_speed)))) |
| return rc; |
| } |
| |
| down(&ctrl->crit_sect); |
| /* turn on board, blink green LED, turn off Amber LED */ |
| if ((rc = p_slot->hpc_ops->slot_enable(p_slot))) { |
| err("%s: Issue of Slot Enable command failed\n", __FUNCTION__); |
| up(&ctrl->crit_sect); |
| return rc; |
| } |
| wait_for_ctrl_irq (ctrl); |
| |
| if ((rc = p_slot->hpc_ops->check_cmd_status(ctrl))) { |
| err("%s: Failed to enable slot, error code(%d)\n", __FUNCTION__, rc); |
| up(&ctrl->crit_sect); |
| return rc; |
| } |
| |
| up(&ctrl->crit_sect); |
| |
| /* Wait for ~1 second */ |
| wait_for_ctrl_irq (ctrl); |
| |
| dbg("%s: slot status = %x\n", __FUNCTION__, p_slot->status); |
| /* Check for a power fault */ |
| if (p_slot->status == 0xFF) { |
| /* power fault occurred, but it was benign */ |
| dbg("%s: power fault\n", __FUNCTION__); |
| rc = POWER_FAILURE; |
| p_slot->status = 0; |
| goto err_exit; |
| } |
| |
| if (shpchp_configure_device(p_slot)) { |
| err("Cannot add device at 0x%x:0x%x\n", p_slot->bus, |
| p_slot->device); |
| goto err_exit; |
| } |
| |
| p_slot->status = 0; |
| p_slot->is_a_board = 0x01; |
| p_slot->pwr_save = 1; |
| |
| /* 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: |
| /* Wait for exclusive access to hardware */ |
| down(&ctrl->crit_sect); |
| |
| /* turn off slot, turn on Amber LED, turn off Green LED */ |
| rc = p_slot->hpc_ops->slot_disable(p_slot); |
| if (rc) { |
| err("%s: Issue of Slot Disable command failed\n", __FUNCTION__); |
| /* Done with exclusive hardware access */ |
| up(&ctrl->crit_sect); |
| return rc; |
| } |
| /* Wait for the command to complete */ |
| wait_for_ctrl_irq (ctrl); |
| |
| rc = p_slot->hpc_ops->check_cmd_status(ctrl); |
| if (rc) { |
| err("%s: Failed to disable slot, error code(%d)\n", __FUNCTION__, rc); |
| /* Done with exclusive hardware access */ |
| up(&ctrl->crit_sect); |
| return rc; |
| } |
| |
| /* Done with exclusive hardware access */ |
| up(&ctrl->crit_sect); |
| |
| return(rc); |
| } |
| |
| |
| /** |
| * remove_board - Turns off slot and LED's |
| * |
| */ |
| static int remove_board(struct slot *p_slot) |
| { |
| struct controller *ctrl = p_slot->ctrl; |
| u8 hp_slot; |
| int rc; |
| |
| if (shpchp_unconfigure_device(p_slot)) |
| return(1); |
| |
| hp_slot = p_slot->device - ctrl->slot_device_offset; |
| p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset); |
| |
| dbg("In %s, hp_slot = %d\n", __FUNCTION__, hp_slot); |
| |
| /* Change status to shutdown */ |
| if (p_slot->is_a_board) |
| p_slot->status = 0x01; |
| |
| /* Wait for exclusive access to hardware */ |
| down(&ctrl->crit_sect); |
| |
| /* turn off slot, turn on Amber LED, turn off Green LED */ |
| rc = p_slot->hpc_ops->slot_disable(p_slot); |
| if (rc) { |
| err("%s: Issue of Slot Disable command failed\n", __FUNCTION__); |
| /* Done with exclusive hardware access */ |
| up(&ctrl->crit_sect); |
| return rc; |
| } |
| /* Wait for the command to complete */ |
| wait_for_ctrl_irq (ctrl); |
| |
| rc = p_slot->hpc_ops->check_cmd_status(ctrl); |
| if (rc) { |
| err("%s: Failed to disable slot, error code(%d)\n", __FUNCTION__, rc); |
| /* Done with exclusive hardware access */ |
| up(&ctrl->crit_sect); |
| return rc; |
| } |
| |
| rc = p_slot->hpc_ops->set_attention_status(p_slot, 0); |
| if (rc) { |
| err("%s: Issue of Set Attention command failed\n", __FUNCTION__); |
| /* Done with exclusive hardware access */ |
| up(&ctrl->crit_sect); |
| return rc; |
| } |
| /* Wait for the command to complete */ |
| wait_for_ctrl_irq (ctrl); |
| |
| /* Done with exclusive hardware access */ |
| up(&ctrl->crit_sect); |
| |
| p_slot->pwr_save = 0; |
| p_slot->is_a_board = 0; |
| |
| return 0; |
| } |
| |
| |
| static void pushbutton_helper_thread (unsigned long data) |
| { |
| pushbutton_pending = data; |
| |
| up(&event_semaphore); |
| } |
| |
| |
| /** |
| * shpchp_pushbutton_thread |
| * |
| * Scheduled procedure to handle blocking stuff for the pushbuttons |
| * Handles all pending events and exits. |
| * |
| */ |
| static void shpchp_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; |
| |
| shpchp_disable_slot(p_slot); |
| p_slot->state = STATIC_STATE; |
| } else { |
| p_slot->state = POWERON_STATE; |
| |
| if (shpchp_enable_slot(p_slot)) { |
| /* 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("shpchpd_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) |
| shpchp_pushbutton_thread(pushbutton_pending); |
| else |
| for (ctrl = shpchp_ctrl_list; ctrl; ctrl=ctrl->next) |
| interrupt_event_handler(ctrl); |
| } |
| dbg("event_thread signals exit\n"); |
| up(&event_exit); |
| return 0; |
| } |
| |
| int shpchp_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 shpchp_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; |
| int result; |
| |
| info = kmalloc(sizeof(*info), GFP_KERNEL); |
| if (!info) |
| return -ENOMEM; |
| |
| 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(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 < 10; loop++) { |
| if (ctrl->event_queue[loop].event_type != 0) { |
| dbg("%s:loop %x event_type %x\n", __FUNCTION__, loop, |
| ctrl->event_queue[loop].event_type); |
| hp_slot = ctrl->event_queue[loop].hp_slot; |
| |
| p_slot = shpchp_find_slot(ctrl, hp_slot + ctrl->slot_device_offset); |
| |
| if (ctrl->event_queue[loop].event_type == INT_BUTTON_CANCEL) { |
| dbg("%s: button cancel\n", __FUNCTION__); |
| del_timer(&p_slot->task_event); |
| |
| switch (p_slot->state) { |
| case BLINKINGOFF_STATE: |
| /* 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); |
| |
| 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); |
| |
| p_slot->hpc_ops->green_led_off(p_slot); |
| /* Wait for the command to complete */ |
| wait_for_ctrl_irq (ctrl); |
| |
| 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; |
| } else if (ctrl->event_queue[loop].event_type == INT_BUTTON_PRESS) { |
| /* Button Pressed (No action on 1st press...) */ |
| dbg("%s: Button pressed\n", __FUNCTION__); |
| |
| p_slot->hpc_ops->get_power_status(p_slot, &getstatus); |
| if (getstatus) { |
| /* slot is on */ |
| dbg("%s: slot is on\n", __FUNCTION__); |
| p_slot->state = BLINKINGOFF_STATE; |
| info(msg_button_off, p_slot->number); |
| } else { |
| /* slot is off */ |
| dbg("%s: slot is off\n", __FUNCTION__); |
| 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 */ |
| p_slot->hpc_ops->green_led_blink(p_slot); |
| /* Wait for the command to complete */ |
| wait_for_ctrl_irq (ctrl); |
| |
| 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; |
| |
| dbg("%s: add_timer p_slot = %p\n", __FUNCTION__,(void *) p_slot); |
| add_timer(&p_slot->task_event); |
| } else if (ctrl->event_queue[loop].event_type == INT_POWER_FAULT) { |
| /***********POWER FAULT********************/ |
| dbg("%s: power fault\n", __FUNCTION__); |
| /* Wait for exclusive access to hardware */ |
| down(&ctrl->crit_sect); |
| |
| p_slot->hpc_ops->set_attention_status(p_slot, 1); |
| /* Wait for the command to complete */ |
| wait_for_ctrl_irq (ctrl); |
| |
| 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); |
| } else { |
| /* refresh notification */ |
| if (p_slot) |
| update_slot_info(p_slot); |
| } |
| |
| ctrl->event_queue[loop].event_type = 0; |
| |
| change = 1; |
| } |
| } /* End of FOR loop */ |
| } |
| |
| return; |
| } |
| |
| |
| int shpchp_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 -ENODEV; |
| } |
| 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 -ENODEV; |
| } |
| 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 -ENODEV; |
| } |
| up(&p_slot->ctrl->crit_sect); |
| |
| p_slot->is_a_board = 1; |
| |
| /* We have to save the presence info for these slots */ |
| p_slot->hpc_ops->get_adapter_status(p_slot, &(p_slot->presence_save)); |
| p_slot->hpc_ops->get_power_status(p_slot, &(p_slot->pwr_save)); |
| dbg("%s: p_slot->pwr_save %x\n", __FUNCTION__, p_slot->pwr_save); |
| p_slot->hpc_ops->get_latch_status(p_slot, &getstatus); |
| |
| rc = board_added(p_slot); |
| if (rc) { |
| p_slot->hpc_ops->get_adapter_status(p_slot, |
| &(p_slot->presence_save)); |
| p_slot->hpc_ops->get_latch_status(p_slot, &getstatus); |
| } |
| |
| update_slot_info(p_slot); |
| return rc; |
| } |
| |
| |
| int shpchp_disable_slot (struct slot *p_slot) |
| { |
| u8 getstatus = 0; |
| int ret = 0; |
| |
| if (!p_slot->ctrl) |
| return -ENODEV; |
| |
| /* Check to see if (latch closed, card present, power on) */ |
| down(&p_slot->ctrl->crit_sect); |
| |
| 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 -ENODEV; |
| } |
| 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 -ENODEV; |
| } |
| 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 -ENODEV; |
| } |
| up(&p_slot->ctrl->crit_sect); |
| |
| ret = remove_board(p_slot); |
| update_slot_info(p_slot); |
| return ret; |
| } |
| |
