linux/drivers/pci/hotplug/acpiphp.h
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   1/*
   2 * ACPI PCI 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) 2002 Hiroshi Aono (h-aono@ap.jp.nec.com)
   8 * Copyright (C) 2002,2003 Takayoshi Kochi (t-kochi@bq.jp.nec.com)
   9 * Copyright (C) 2002,2003 NEC Corporation
  10 * Copyright (C) 2003-2005 Matthew Wilcox (matthew.wilcox@hp.com)
  11 * Copyright (C) 2003-2005 Hewlett Packard
  12 *
  13 * All rights reserved.
  14 *
  15 * This program is free software; you can redistribute it and/or modify
  16 * it under the terms of the GNU General Public License as published by
  17 * the Free Software Foundation; either version 2 of the License, or (at
  18 * your option) any later version.
  19 *
  20 * This program is distributed in the hope that it will be useful, but
  21 * WITHOUT ANY WARRANTY; without even the implied warranty of
  22 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or
  23 * NON INFRINGEMENT.  See the GNU General Public License for more
  24 * details.
  25 *
  26 * You should have received a copy of the GNU General Public License
  27 * along with this program; if not, write to the Free Software
  28 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
  29 *
  30 * Send feedback to <gregkh@us.ibm.com>,
  31 *                  <t-kochi@bq.jp.nec.com>
  32 *
  33 */
  34
  35#ifndef _ACPIPHP_H
  36#define _ACPIPHP_H
  37
  38#include <linux/acpi.h>
  39#include <linux/mutex.h>
  40#include <linux/pci_hotplug.h>
  41
  42#define dbg(format, arg...)                                     \
  43        do {                                                    \
  44                if (acpiphp_debug)                              \
  45                        printk(KERN_DEBUG "%s: " format,        \
  46                                MY_NAME , ## arg);              \
  47        } while (0)
  48#define err(format, arg...) printk(KERN_ERR "%s: " format, MY_NAME , ## arg)
  49#define info(format, arg...) printk(KERN_INFO "%s: " format, MY_NAME , ## arg)
  50#define warn(format, arg...) printk(KERN_WARNING "%s: " format, MY_NAME , ## arg)
  51
  52struct acpiphp_bridge;
  53struct acpiphp_slot;
  54
  55/*
  56 * struct slot - slot information for each *physical* slot
  57 */
  58struct slot {
  59        struct hotplug_slot     *hotplug_slot;
  60        struct acpiphp_slot     *acpi_slot;
  61        struct hotplug_slot_info info;
  62};
  63
  64static inline const char *slot_name(struct slot *slot)
  65{
  66        return hotplug_slot_name(slot->hotplug_slot);
  67}
  68
  69/*
  70 * struct acpiphp_bridge - PCI bridge information
  71 *
  72 * for each bridge device in ACPI namespace
  73 */
  74struct acpiphp_bridge {
  75        struct list_head list;
  76        acpi_handle handle;
  77        struct acpiphp_slot *slots;
  78
  79        /* Ejectable PCI-to-PCI bridge (PCI bridge and PCI function) */
  80        struct acpiphp_func *func;
  81
  82        int type;
  83        int nr_slots;
  84
  85        u32 flags;
  86
  87        /* This bus (host bridge) or Secondary bus (PCI-to-PCI bridge) */
  88        struct pci_bus *pci_bus;
  89
  90        /* PCI-to-PCI bridge device */
  91        struct pci_dev *pci_dev;
  92
  93        spinlock_t res_lock;
  94};
  95
  96
  97/*
  98 * struct acpiphp_slot - PCI slot information
  99 *
 100 * PCI slot information for each *physical* PCI slot
 101 */
 102struct acpiphp_slot {
 103        struct acpiphp_slot *next;
 104        struct acpiphp_bridge *bridge;  /* parent */
 105        struct list_head funcs;         /* one slot may have different
 106                                           objects (i.e. for each function) */
 107        struct slot *slot;
 108        struct mutex crit_sect;
 109
 110        u8              device;         /* pci device# */
 111
 112        unsigned long long sun;         /* ACPI _SUN (slot unique number) */
 113        u32             flags;          /* see below */
 114};
 115
 116
 117/*
 118 * struct acpiphp_func - PCI function information
 119 *
 120 * PCI function information for each object in ACPI namespace
 121 * typically 8 objects per slot (i.e. for each PCI function)
 122 */
 123struct acpiphp_func {
 124        struct acpiphp_slot *slot;      /* parent */
 125        struct acpiphp_bridge *bridge;  /* Ejectable PCI-to-PCI bridge */
 126
 127        struct list_head sibling;
 128        struct notifier_block nb;
 129        acpi_handle     handle;
 130
 131        u8              function;       /* pci function# */
 132        u32             flags;          /* see below */
 133};
 134
 135/*
 136 * struct acpiphp_attention_info - device specific attention registration
 137 *
 138 * ACPI has no generic method of setting/getting attention status
 139 * this allows for device specific driver registration
 140 */
 141struct acpiphp_attention_info
 142{
 143        int (*set_attn)(struct hotplug_slot *slot, u8 status);
 144        int (*get_attn)(struct hotplug_slot *slot, u8 *status);
 145        struct module *owner;
 146};
 147
 148/* PCI bus bridge HID */
 149#define ACPI_PCI_HOST_HID               "PNP0A03"
 150
 151/* PCI BRIDGE type */
 152#define BRIDGE_TYPE_HOST                0
 153#define BRIDGE_TYPE_P2P                 1
 154
 155/* ACPI _STA method value (ignore bit 4; battery present) */
 156#define ACPI_STA_PRESENT                (0x00000001)
 157#define ACPI_STA_ENABLED                (0x00000002)
 158#define ACPI_STA_SHOW_IN_UI             (0x00000004)
 159#define ACPI_STA_FUNCTIONING            (0x00000008)
 160#define ACPI_STA_ALL                    (0x0000000f)
 161
 162/* bridge flags */
 163#define BRIDGE_HAS_STA          (0x00000001)
 164#define BRIDGE_HAS_EJ0          (0x00000002)
 165#define BRIDGE_HAS_HPP          (0x00000004)
 166#define BRIDGE_HAS_PS0          (0x00000010)
 167#define BRIDGE_HAS_PS1          (0x00000020)
 168#define BRIDGE_HAS_PS2          (0x00000040)
 169#define BRIDGE_HAS_PS3          (0x00000080)
 170
 171/* slot flags */
 172
 173#define SLOT_POWEREDON          (0x00000001)
 174#define SLOT_ENABLED            (0x00000002)
 175#define SLOT_MULTIFUNCTION      (0x00000004)
 176
 177/* function flags */
 178
 179#define FUNC_HAS_STA            (0x00000001)
 180#define FUNC_HAS_EJ0            (0x00000002)
 181#define FUNC_HAS_PS0            (0x00000010)
 182#define FUNC_HAS_PS1            (0x00000020)
 183#define FUNC_HAS_PS2            (0x00000040)
 184#define FUNC_HAS_PS3            (0x00000080)
 185#define FUNC_HAS_DCK            (0x00000100)
 186
 187/* function prototypes */
 188
 189/* acpiphp_core.c */
 190extern int acpiphp_register_attention(struct acpiphp_attention_info*info);
 191extern int acpiphp_unregister_attention(struct acpiphp_attention_info *info);
 192extern int acpiphp_register_hotplug_slot(struct acpiphp_slot *slot);
 193extern void acpiphp_unregister_hotplug_slot(struct acpiphp_slot *slot);
 194
 195/* acpiphp_glue.c */
 196extern int acpiphp_glue_init (void);
 197extern void acpiphp_glue_exit (void);
 198extern int acpiphp_get_num_slots (void);
 199typedef int (*acpiphp_callback)(struct acpiphp_slot *slot, void *data);
 200
 201extern int acpiphp_enable_slot (struct acpiphp_slot *slot);
 202extern int acpiphp_disable_slot (struct acpiphp_slot *slot);
 203extern int acpiphp_eject_slot (struct acpiphp_slot *slot);
 204extern u8 acpiphp_get_power_status (struct acpiphp_slot *slot);
 205extern u8 acpiphp_get_attention_status (struct acpiphp_slot *slot);
 206extern u8 acpiphp_get_latch_status (struct acpiphp_slot *slot);
 207extern u8 acpiphp_get_adapter_status (struct acpiphp_slot *slot);
 208
 209/* variables */
 210extern int acpiphp_debug;
 211
 212#endif /* _ACPIPHP_H */
 213