patch-2.4.20 linux-2.4.20/drivers/hotplug/pcihp_acpi.c
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- Lines: 398
- Date:
Wed Dec 31 16:00:00 1969
- Orig file:
linux-2.4.19/drivers/hotplug/pcihp_acpi.c
- Orig date:
Fri Aug 2 17:39:44 2002
diff -urN linux-2.4.19/drivers/hotplug/pcihp_acpi.c linux-2.4.20/drivers/hotplug/pcihp_acpi.c
@@ -1,397 +0,0 @@
-/*
- * ACPI PCI Hot Plug Controller Driver
- *
- * Copyright (c) 2001-2002 Greg Kroah-Hartman (greg@kroah.com)
- * Copyright (c) 2001-2002 IBM Corp.
- * Copyright (c) 2002 Hiroshi Aono (h-aono@ap.jp.nec.com)
- * Copyright (c) 2002 Takayoshi Kochi (t-kouchi@cq.jp.nec.com)
- * Copyright (c) 2002 NEC 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 <gregkh@us.ibm.com>,
- * <h-aono@ap.jp.nec.com>,
- * <t-kouchi@cq.jp.nec.com>
- *
- */
-
-#include <linux/config.h>
-#include <linux/module.h>
-#include <linux/kernel.h>
-#include <linux/slab.h>
-#include <linux/pci.h>
-#include <linux/init.h>
-#include "pci_hotplug.h"
-#include "pcihp_acpi.h"
-
-static LIST_HEAD(slot_list);
-
-#if !defined(CONFIG_HOTPLUG_PCI_ACPI_MODULE)
- #define MY_NAME "pcihp_acpi"
-#else
- #define MY_NAME THIS_MODULE->name
-#endif
-
-/* local variables */
-static int debug = 1; /* XXX */
-static int num_slots;
-
-#define DRIVER_VERSION "0.2"
-#define DRIVER_AUTHOR "Greg Kroah-Hartman <gregkh@us.ibm.com>"
-#define DRIVER_DESC "ACPI Hot Plug PCI Controller Driver"
-
-MODULE_AUTHOR(DRIVER_AUTHOR);
-MODULE_DESCRIPTION(DRIVER_DESC);
-MODULE_LICENSE("GPL");
-MODULE_PARM(debug, "i");
-MODULE_PARM_DESC(debug, "Debugging mode enabled or not");
-
-static int enable_slot (struct hotplug_slot *slot);
-static int disable_slot (struct hotplug_slot *slot);
-static int set_attention_status (struct hotplug_slot *slot, u8 value);
-static int hardware_test (struct hotplug_slot *slot, u32 value);
-static int get_power_status (struct hotplug_slot *slot, u8 *value);
-static int get_attention_status (struct hotplug_slot *slot, u8 *value);
-static int get_latch_status (struct hotplug_slot *slot, u8 *value);
-static int get_adapter_status (struct hotplug_slot *slot, u8 *value);
-
-static struct hotplug_slot_ops acpi_hotplug_slot_ops = {
- owner: THIS_MODULE,
- enable_slot: enable_slot,
- disable_slot: disable_slot,
- set_attention_status: set_attention_status,
- hardware_test: hardware_test,
- get_power_status: get_power_status,
- get_attention_status: get_attention_status,
- get_latch_status: get_latch_status,
- get_adapter_status: get_adapter_status,
-};
-
-
-/* Inline functions to check the sanity of a pointer that is passed to us */
-static inline int slot_paranoia_check (struct slot *slot, const char *function)
-{
- if (!slot) {
- dbg("%s - slot == NULL", function);
- return -1;
- }
- if (slot->magic != SLOT_MAGIC) {
- dbg("%s - bad magic number for slot", function);
- return -1;
- }
- if (!slot->hotplug_slot) {
- dbg("%s - slot->hotplug_slot == NULL!", function);
- return -1;
- }
- return 0;
-}
-
-static inline struct slot *get_slot (struct hotplug_slot *hotplug_slot, const char *function)
-{
- struct slot *slot;
-
- if (!hotplug_slot) {
- dbg("%s - hotplug_slot == NULL", function);
- return NULL;
- }
-
- slot = (struct slot *)hotplug_slot->private;
- if (slot_paranoia_check (slot, function))
- return NULL;
- return slot;
-}
-
-
-static int enable_slot (struct hotplug_slot *hotplug_slot)
-{
- struct slot *slot = get_slot (hotplug_slot, __FUNCTION__);
- int retval = 0;
-
- if (slot == NULL)
- return -ENODEV;
-
- dbg ("%s - physical_slot = %s", __FUNCTION__, hotplug_slot->name);
-
- /* enable the specified slot */
- retval = pcihp_acpi_enable_slot (slot->acpi_slot);
-
- return retval;
-}
-
-static int disable_slot (struct hotplug_slot *hotplug_slot)
-{
- struct slot *slot = get_slot (hotplug_slot, __FUNCTION__);
- int retval = 0;
-
- if (slot == NULL)
- return -ENODEV;
-
- dbg ("%s - physical_slot = %s", __FUNCTION__, hotplug_slot->name);
-
- /* disable the specified slot */
- retval = pcihp_acpi_disable_slot (slot->acpi_slot);
-
- return retval;
-}
-
-static int set_attention_status (struct hotplug_slot *hotplug_slot, u8 status)
-{
- struct slot *slot = get_slot (hotplug_slot, __FUNCTION__);
- int retval = 0;
-
- if (slot == NULL)
- return -ENODEV;
-
- dbg ("%s - physical_slot = %s", __FUNCTION__, hotplug_slot->name);
-
- /* TBD
- * ACPI doesn't have known method to manipulate
- * attention status LED
- */
- switch (status) {
- case 0:
- /* FIXME turn light off */
- slot->attention_status = 0;
- break;
-
- case 1:
- default:
- /* FIXME turn light on */
- slot->attention_status = 1;
- break;
- }
-
- return retval;
-}
-
-static int hardware_test (struct hotplug_slot *hotplug_slot, u32 value)
-{
- struct slot *slot = get_slot (hotplug_slot, __FUNCTION__);
- int retval = 0;
-
- if (slot == NULL)
- return -ENODEV;
-
- dbg ("%s - physical_slot = %s", __FUNCTION__, hotplug_slot->name);
-
- err ("No hardware tests are defined for this driver");
- retval = -ENODEV;
-
- return retval;
-}
-
-static int get_power_status (struct hotplug_slot *hotplug_slot, u8 *value)
-{
- struct slot *slot = get_slot (hotplug_slot, __FUNCTION__);
- int retval = 0;
-
- if (slot == NULL)
- return -ENODEV;
-
- dbg("%s - physical_slot = %s", __FUNCTION__, hotplug_slot->name);
-
- *value = pcihp_acpi_get_power_status (slot->acpi_slot);
-
- return retval;
-}
-
-static int get_attention_status (struct hotplug_slot *hotplug_slot, u8 *value)
-{
- struct slot *slot = get_slot (hotplug_slot, __FUNCTION__);
- int retval = 0;
-
- if (slot == NULL)
- return -ENODEV;
-
- dbg("%s - physical_slot = %s", __FUNCTION__, hotplug_slot->name);
-
- *value = slot->attention_status;
-
- return retval;
-}
-
-static int get_latch_status (struct hotplug_slot *hotplug_slot, u8 *value)
-{
- struct slot *slot = get_slot (hotplug_slot, __FUNCTION__);
- int retval = 0;
-
- if (slot == NULL)
- return -ENODEV;
-
- dbg("%s - physical_slot = %s", __FUNCTION__, hotplug_slot->name);
-
- *value = pcihp_acpi_get_latch_status (slot->acpi_slot);
-
- return retval;
-}
-
-static int get_adapter_status (struct hotplug_slot *hotplug_slot, u8 *value)
-{
- struct slot *slot = get_slot (hotplug_slot, __FUNCTION__);
- int retval = 0;
-
- if (slot == NULL)
- return -ENODEV;
-
- dbg("%s - physical_slot = %s", __FUNCTION__, hotplug_slot->name);
-
- *value = pcihp_acpi_get_adapter_status (slot->acpi_slot);
-
- return retval;
-}
-
-static int init_acpi (void)
-{
- int retval;
-
- dbg("init_acpi"); /* XXX */
- /* initialize internal data structure etc. */
- retval = pcihp_acpi_glue_init();
-
- /* read initial number of slots */
- if (!retval) {
- num_slots = pcihp_acpi_get_num_slots();
- if (num_slots == 0)
- retval = -ENODEV;
- }
-
- return retval;
-}
-
-static void exit_acpi (void)
-{
- /* deallocate internal data structures etc. */
- pcihp_acpi_glue_exit();
-}
-
-#define SLOT_NAME_SIZE 10
-static void make_slot_name (struct slot *slot)
-{
- /* FIXME - get this from the ACPI representation of the slot */
- snprintf (slot->hotplug_slot->name, SLOT_NAME_SIZE, "ACPI%d", slot->number);
-}
-
-static int init_slots (void)
-{
- struct slot *slot;
- int retval = 0;
- int i;
-
- for (i = 0; i < num_slots; ++i) {
- slot = kmalloc (sizeof (struct slot), GFP_KERNEL);
- if (!slot)
- return -ENOMEM;
- memset(slot, 0, sizeof(struct slot));
-
- slot->hotplug_slot = kmalloc (sizeof (struct hotplug_slot), GFP_KERNEL);
- if (!slot->hotplug_slot) {
- kfree (slot);
- return -ENOMEM;
- }
- memset(slot->hotplug_slot, 0, sizeof (struct hotplug_slot));
-
- slot->hotplug_slot->info = kmalloc (sizeof (struct hotplug_slot_info), GFP_KERNEL);
- if (!slot->hotplug_slot->info) {
- kfree (slot->hotplug_slot);
- kfree (slot);
- return -ENOMEM;
- }
- memset(slot->hotplug_slot->info, 0, sizeof (struct hotplug_slot_info));
-
- slot->hotplug_slot->name = kmalloc (SLOT_NAME_SIZE, GFP_KERNEL);
- if (!slot->hotplug_slot->name) {
- kfree (slot->hotplug_slot->info);
- kfree (slot->hotplug_slot);
- kfree (slot);
- return -ENOMEM;
- }
-
- slot->magic = SLOT_MAGIC;
- slot->number = i;
-
- slot->hotplug_slot->private = slot;
- make_slot_name (slot);
- slot->hotplug_slot->ops = &acpi_hotplug_slot_ops;
-
- slot->acpi_slot = get_slot_from_id (i);
- slot->hotplug_slot->info->power_status = pcihp_acpi_get_power_status(slot->acpi_slot);
- slot->hotplug_slot->info->attention_status = pcihp_acpi_get_attention_status(slot->acpi_slot);
- slot->hotplug_slot->info->latch_status = pcihp_acpi_get_latch_status(slot->acpi_slot);
- slot->hotplug_slot->info->adapter_status = pcihp_acpi_get_adapter_status(slot->acpi_slot);
-
- dbg ("registering slot %d", i);
- retval = pci_hp_register (slot->hotplug_slot);
- if (retval) {
- err ("pci_hp_register failed with error %d", retval);
- kfree (slot->hotplug_slot->info);
- kfree (slot->hotplug_slot->name);
- kfree (slot->hotplug_slot);
- kfree (slot);
- return retval;
- }
-
- /* add slot to our internal list */
- list_add (&slot->slot_list, &slot_list);
- }
-
- return retval;
-}
-
-static void cleanup_slots (void)
-{
- struct list_head *tmp;
- struct slot *slot;
-
- list_for_each (tmp, &slot_list) {
- slot = list_entry (tmp, struct slot, slot_list);
- list_del (&slot->slot_list);
- pci_hp_deregister (slot->hotplug_slot);
- kfree (slot->hotplug_slot->info);
- kfree (slot->hotplug_slot->name);
- kfree (slot->hotplug_slot);
- kfree (slot);
- }
-
- return;
-}
-
-static int __init pcihp_acpi_init(void)
-{
- int retval;
-
- /* read all the ACPI info from the system */
- retval = init_acpi();
- if (retval)
- return retval;
-
- retval = init_slots();
- if (retval)
- return retval;
-
- info (DRIVER_DESC " version: " DRIVER_VERSION);
- return 0;
-}
-
-static void __exit pcihp_acpi_exit(void)
-{
- cleanup_slots();
- exit_acpi();
-}
-
-module_init(pcihp_acpi_init);
-module_exit(pcihp_acpi_exit);
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