Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 1 | /* |
| 2 | * acpi_system.c - ACPI System Driver ($Revision: 63 $) |
| 3 | * |
| 4 | * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com> |
| 5 | * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com> |
| 6 | * |
| 7 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 8 | * |
| 9 | * This program is free software; you can redistribute it and/or modify |
| 10 | * it under the terms of the GNU General Public License as published by |
| 11 | * the Free Software Foundation; either version 2 of the License, or (at |
| 12 | * your option) any later version. |
| 13 | * |
| 14 | * This program is distributed in the hope that it will be useful, but |
| 15 | * WITHOUT ANY WARRANTY; without even the implied warranty of |
| 16 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU |
| 17 | * General Public License for more details. |
| 18 | * |
| 19 | * You should have received a copy of the GNU General Public License along |
| 20 | * with this program; if not, write to the Free Software Foundation, Inc., |
| 21 | * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. |
| 22 | * |
| 23 | * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~ |
| 24 | */ |
| 25 | |
| 26 | #include <linux/proc_fs.h> |
| 27 | #include <linux/seq_file.h> |
| 28 | #include <linux/init.h> |
| 29 | #include <asm/uaccess.h> |
| 30 | |
| 31 | #include <acpi/acpi_drivers.h> |
| 32 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 33 | #define _COMPONENT ACPI_SYSTEM_COMPONENT |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 34 | ACPI_MODULE_NAME("acpi_system") |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 35 | #define ACPI_SYSTEM_CLASS "system" |
| 36 | #define ACPI_SYSTEM_DRIVER_NAME "ACPI System Driver" |
| 37 | #define ACPI_SYSTEM_DEVICE_NAME "System" |
| 38 | #define ACPI_SYSTEM_FILE_INFO "info" |
| 39 | #define ACPI_SYSTEM_FILE_EVENT "event" |
| 40 | #define ACPI_SYSTEM_FILE_DSDT "dsdt" |
| 41 | #define ACPI_SYSTEM_FILE_FADT "fadt" |
Bob Moore | 793c238 | 2006-03-31 00:00:00 -0500 | [diff] [blame] | 42 | extern struct fadt_descriptor acpi_fadt; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 43 | |
| 44 | /* -------------------------------------------------------------------------- |
| 45 | FS Interface (/proc) |
| 46 | -------------------------------------------------------------------------- */ |
| 47 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 48 | static int acpi_system_read_info(struct seq_file *seq, void *offset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 49 | { |
| 50 | ACPI_FUNCTION_TRACE("acpi_system_read_info"); |
| 51 | |
| 52 | seq_printf(seq, "version: %x\n", ACPI_CA_VERSION); |
| 53 | return_VALUE(0); |
| 54 | } |
| 55 | |
| 56 | static int acpi_system_info_open_fs(struct inode *inode, struct file *file) |
| 57 | { |
| 58 | return single_open(file, acpi_system_read_info, PDE(inode)->data); |
| 59 | } |
| 60 | |
| 61 | static struct file_operations acpi_system_info_ops = { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 62 | .open = acpi_system_info_open_fs, |
| 63 | .read = seq_read, |
| 64 | .llseek = seq_lseek, |
| 65 | .release = single_release, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 66 | }; |
| 67 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 68 | static ssize_t acpi_system_read_dsdt(struct file *, char __user *, size_t, |
| 69 | loff_t *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 70 | |
| 71 | static struct file_operations acpi_system_dsdt_ops = { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 72 | .read = acpi_system_read_dsdt, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 73 | }; |
| 74 | |
| 75 | static ssize_t |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 76 | acpi_system_read_dsdt(struct file *file, |
| 77 | char __user * buffer, size_t count, loff_t * ppos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 78 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 79 | acpi_status status = AE_OK; |
| 80 | struct acpi_buffer dsdt = { ACPI_ALLOCATE_BUFFER, NULL }; |
| 81 | ssize_t res; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 82 | |
| 83 | ACPI_FUNCTION_TRACE("acpi_system_read_dsdt"); |
| 84 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame^] | 85 | status = acpi_get_table(ACPI_TABLE_ID_DSDT, 1, &dsdt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 86 | if (ACPI_FAILURE(status)) |
| 87 | return_VALUE(-ENODEV); |
| 88 | |
| 89 | res = simple_read_from_buffer(buffer, count, ppos, |
| 90 | dsdt.pointer, dsdt.length); |
| 91 | acpi_os_free(dsdt.pointer); |
| 92 | |
| 93 | return_VALUE(res); |
| 94 | } |
| 95 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 96 | static ssize_t acpi_system_read_fadt(struct file *, char __user *, size_t, |
| 97 | loff_t *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 98 | |
| 99 | static struct file_operations acpi_system_fadt_ops = { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 100 | .read = acpi_system_read_fadt, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | }; |
| 102 | |
| 103 | static ssize_t |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 104 | acpi_system_read_fadt(struct file *file, |
| 105 | char __user * buffer, size_t count, loff_t * ppos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 106 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 107 | acpi_status status = AE_OK; |
| 108 | struct acpi_buffer fadt = { ACPI_ALLOCATE_BUFFER, NULL }; |
| 109 | ssize_t res; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | |
| 111 | ACPI_FUNCTION_TRACE("acpi_system_read_fadt"); |
| 112 | |
Bob Moore | b229cf9 | 2006-04-21 17:15:00 -0400 | [diff] [blame^] | 113 | status = acpi_get_table(ACPI_TABLE_ID_FADT, 1, &fadt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | if (ACPI_FAILURE(status)) |
| 115 | return_VALUE(-ENODEV); |
| 116 | |
| 117 | res = simple_read_from_buffer(buffer, count, ppos, |
| 118 | fadt.pointer, fadt.length); |
| 119 | acpi_os_free(fadt.pointer); |
| 120 | |
| 121 | return_VALUE(res); |
| 122 | } |
| 123 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 124 | static int __init acpi_system_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 125 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 126 | struct proc_dir_entry *entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | int error = 0; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 128 | char *name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | |
| 130 | ACPI_FUNCTION_TRACE("acpi_system_init"); |
| 131 | |
| 132 | if (acpi_disabled) |
| 133 | return_VALUE(0); |
| 134 | |
| 135 | /* 'info' [R] */ |
| 136 | name = ACPI_SYSTEM_FILE_INFO; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 137 | entry = create_proc_entry(name, S_IRUGO, acpi_root_dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 138 | if (!entry) |
| 139 | goto Error; |
| 140 | else { |
| 141 | entry->proc_fops = &acpi_system_info_ops; |
| 142 | } |
| 143 | |
| 144 | /* 'dsdt' [R] */ |
| 145 | name = ACPI_SYSTEM_FILE_DSDT; |
| 146 | entry = create_proc_entry(name, S_IRUSR, acpi_root_dir); |
| 147 | if (entry) |
| 148 | entry->proc_fops = &acpi_system_dsdt_ops; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 149 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 150 | goto Error; |
| 151 | |
| 152 | /* 'fadt' [R] */ |
| 153 | name = ACPI_SYSTEM_FILE_FADT; |
| 154 | entry = create_proc_entry(name, S_IRUSR, acpi_root_dir); |
| 155 | if (entry) |
| 156 | entry->proc_fops = &acpi_system_fadt_ops; |
| 157 | else |
| 158 | goto Error; |
| 159 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 160 | Done: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 161 | return_VALUE(error); |
| 162 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 163 | Error: |
| 164 | ACPI_DEBUG_PRINT((ACPI_DB_ERROR, |
| 165 | "Unable to create '%s' proc fs entry\n", name)); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 166 | |
| 167 | remove_proc_entry(ACPI_SYSTEM_FILE_FADT, acpi_root_dir); |
| 168 | remove_proc_entry(ACPI_SYSTEM_FILE_DSDT, acpi_root_dir); |
| 169 | remove_proc_entry(ACPI_SYSTEM_FILE_INFO, acpi_root_dir); |
| 170 | |
| 171 | error = -EFAULT; |
| 172 | goto Done; |
| 173 | } |
| 174 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 175 | subsys_initcall(acpi_system_init); |