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") |
Zhang Rui | 5bb730f | 2007-01-29 11:02:42 +0800 | [diff] [blame] | 35 | #ifdef MODULE_PARAM_PREFIX |
| 36 | #undef MODULE_PARAM_PREFIX |
| 37 | #endif |
| 38 | #define MODULE_PARAM_PREFIX "acpi." |
| 39 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 40 | #define ACPI_SYSTEM_CLASS "system" |
| 41 | #define ACPI_SYSTEM_DRIVER_NAME "ACPI System Driver" |
| 42 | #define ACPI_SYSTEM_DEVICE_NAME "System" |
| 43 | #define ACPI_SYSTEM_FILE_INFO "info" |
| 44 | #define ACPI_SYSTEM_FILE_EVENT "event" |
| 45 | #define ACPI_SYSTEM_FILE_DSDT "dsdt" |
| 46 | #define ACPI_SYSTEM_FILE_FADT "fadt" |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 47 | |
Zhang Rui | 5bb730f | 2007-01-29 11:02:42 +0800 | [diff] [blame] | 48 | /* |
| 49 | * Make ACPICA version work as module param |
| 50 | */ |
| 51 | static int param_get_acpica_version(char *buffer, struct kernel_param *kp) { |
| 52 | int result; |
| 53 | |
| 54 | result = sprintf(buffer, "%x", ACPI_CA_VERSION); |
| 55 | |
| 56 | return result; |
| 57 | } |
| 58 | |
| 59 | module_param_call(acpica_version, NULL, param_get_acpica_version, NULL, 0444); |
| 60 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 61 | /* -------------------------------------------------------------------------- |
| 62 | FS Interface (/proc) |
| 63 | -------------------------------------------------------------------------- */ |
Zhang Rui | 5bb730f | 2007-01-29 11:02:42 +0800 | [diff] [blame] | 64 | #ifdef CONFIG_ACPI_PROCFS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 65 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 66 | static int acpi_system_read_info(struct seq_file *seq, void *offset) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 67 | { |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 68 | |
| 69 | seq_printf(seq, "version: %x\n", ACPI_CA_VERSION); |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 70 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 71 | } |
| 72 | |
| 73 | static int acpi_system_info_open_fs(struct inode *inode, struct file *file) |
| 74 | { |
| 75 | return single_open(file, acpi_system_read_info, PDE(inode)->data); |
| 76 | } |
| 77 | |
Arjan van de Ven | d750803 | 2006-07-04 13:06:00 -0400 | [diff] [blame] | 78 | static const struct file_operations acpi_system_info_ops = { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 79 | .open = acpi_system_info_open_fs, |
| 80 | .read = seq_read, |
| 81 | .llseek = seq_lseek, |
| 82 | .release = single_release, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 83 | }; |
Zhang Rui | 5bb730f | 2007-01-29 11:02:42 +0800 | [diff] [blame] | 84 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 85 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 86 | static ssize_t acpi_system_read_dsdt(struct file *, char __user *, size_t, |
| 87 | loff_t *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 88 | |
Arjan van de Ven | d750803 | 2006-07-04 13:06:00 -0400 | [diff] [blame] | 89 | static const struct file_operations acpi_system_dsdt_ops = { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 90 | .read = acpi_system_read_dsdt, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 91 | }; |
| 92 | |
| 93 | static ssize_t |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 94 | acpi_system_read_dsdt(struct file *file, |
| 95 | char __user * buffer, size_t count, loff_t * ppos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 96 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 97 | acpi_status status = AE_OK; |
Alexey Starikovskiy | ad71860a | 2007-02-02 19:48:19 +0300 | [diff] [blame] | 98 | struct acpi_table_header *dsdt = NULL; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 99 | ssize_t res; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 100 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 101 | |
Alexey Starikovskiy | ad71860a | 2007-02-02 19:48:19 +0300 | [diff] [blame] | 102 | status = acpi_get_table(ACPI_SIG_DSDT, 1, &dsdt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 103 | if (ACPI_FAILURE(status)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 104 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 105 | |
| 106 | res = simple_read_from_buffer(buffer, count, ppos, |
Alexey Starikovskiy | ad71860a | 2007-02-02 19:48:19 +0300 | [diff] [blame] | 107 | dsdt, dsdt->length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 108 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 109 | return res; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 110 | } |
| 111 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 112 | static ssize_t acpi_system_read_fadt(struct file *, char __user *, size_t, |
| 113 | loff_t *); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 114 | |
Arjan van de Ven | d750803 | 2006-07-04 13:06:00 -0400 | [diff] [blame] | 115 | static const struct file_operations acpi_system_fadt_ops = { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 116 | .read = acpi_system_read_fadt, |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 117 | }; |
| 118 | |
| 119 | static ssize_t |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 120 | acpi_system_read_fadt(struct file *file, |
| 121 | char __user * buffer, size_t count, loff_t * ppos) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 122 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 123 | acpi_status status = AE_OK; |
Alexey Starikovskiy | ad71860a | 2007-02-02 19:48:19 +0300 | [diff] [blame] | 124 | struct acpi_table_header *fadt = NULL; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 125 | ssize_t res; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 126 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 127 | |
Alexey Starikovskiy | ad71860a | 2007-02-02 19:48:19 +0300 | [diff] [blame] | 128 | status = acpi_get_table(ACPI_SIG_FADT, 1, &fadt); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 129 | if (ACPI_FAILURE(status)) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 130 | return -ENODEV; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 131 | |
| 132 | res = simple_read_from_buffer(buffer, count, ppos, |
Alexey Starikovskiy | ad71860a | 2007-02-02 19:48:19 +0300 | [diff] [blame] | 133 | fadt, fadt->length); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 134 | |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 135 | return res; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 136 | } |
| 137 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 138 | static int __init acpi_system_init(void) |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 139 | { |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 140 | struct proc_dir_entry *entry; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 141 | int error = 0; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 142 | char *name; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 143 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 144 | |
| 145 | if (acpi_disabled) |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 146 | return 0; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 147 | |
Zhang Rui | 5bb730f | 2007-01-29 11:02:42 +0800 | [diff] [blame] | 148 | #ifdef CONFIG_ACPI_PROCFS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 149 | /* 'info' [R] */ |
| 150 | name = ACPI_SYSTEM_FILE_INFO; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 151 | entry = create_proc_entry(name, S_IRUGO, acpi_root_dir); |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 152 | if (!entry) |
| 153 | goto Error; |
| 154 | else { |
| 155 | entry->proc_fops = &acpi_system_info_ops; |
| 156 | } |
Zhang Rui | 5bb730f | 2007-01-29 11:02:42 +0800 | [diff] [blame] | 157 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 158 | |
| 159 | /* 'dsdt' [R] */ |
| 160 | name = ACPI_SYSTEM_FILE_DSDT; |
| 161 | entry = create_proc_entry(name, S_IRUSR, acpi_root_dir); |
| 162 | if (entry) |
| 163 | entry->proc_fops = &acpi_system_dsdt_ops; |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 164 | else |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 165 | goto Error; |
| 166 | |
| 167 | /* 'fadt' [R] */ |
| 168 | name = ACPI_SYSTEM_FILE_FADT; |
| 169 | entry = create_proc_entry(name, S_IRUSR, acpi_root_dir); |
| 170 | if (entry) |
| 171 | entry->proc_fops = &acpi_system_fadt_ops; |
| 172 | else |
| 173 | goto Error; |
| 174 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 175 | Done: |
Patrick Mochel | d550d98 | 2006-06-27 00:41:40 -0400 | [diff] [blame] | 176 | return error; |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 177 | |
Len Brown | 4be44fc | 2005-08-05 00:44:28 -0400 | [diff] [blame] | 178 | Error: |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 179 | remove_proc_entry(ACPI_SYSTEM_FILE_FADT, acpi_root_dir); |
| 180 | remove_proc_entry(ACPI_SYSTEM_FILE_DSDT, acpi_root_dir); |
Zhang Rui | 5bb730f | 2007-01-29 11:02:42 +0800 | [diff] [blame] | 181 | #ifdef CONFIG_ACPI_PROCFS |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 182 | remove_proc_entry(ACPI_SYSTEM_FILE_INFO, acpi_root_dir); |
Zhang Rui | 5bb730f | 2007-01-29 11:02:42 +0800 | [diff] [blame] | 183 | #endif |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 184 | |
| 185 | error = -EFAULT; |
| 186 | goto Done; |
| 187 | } |
| 188 | |
Linus Torvalds | 1da177e | 2005-04-16 15:20:36 -0700 | [diff] [blame] | 189 | subsys_initcall(acpi_system_init); |