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path: root/drivers/acpi/system.c
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Diffstat (limited to 'drivers/acpi/system.c')
-rw-r--r--drivers/acpi/system.c187
1 files changed, 187 insertions, 0 deletions
diff --git a/drivers/acpi/system.c b/drivers/acpi/system.c
new file mode 100644
index 000000000000..8925a6ca5f87
--- /dev/null
+++ b/drivers/acpi/system.c
@@ -0,0 +1,187 @@
+/*
+ * acpi_system.c - ACPI System Driver ($Revision: 63 $)
+ *
+ * Copyright (C) 2001, 2002 Andy Grover <andrew.grover@intel.com>
+ * Copyright (C) 2001, 2002 Paul Diefenbaugh <paul.s.diefenbaugh@intel.com>
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ *
+ * 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. 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.,
+ * 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ *
+ * ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ */
+
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+#include <linux/init.h>
+#include <asm/uaccess.h>
+
+#include <acpi/acpi_drivers.h>
+
+
+#define _COMPONENT ACPI_SYSTEM_COMPONENT
+ACPI_MODULE_NAME ("acpi_system")
+
+#define ACPI_SYSTEM_CLASS "system"
+#define ACPI_SYSTEM_DRIVER_NAME "ACPI System Driver"
+#define ACPI_SYSTEM_DEVICE_NAME "System"
+#define ACPI_SYSTEM_FILE_INFO "info"
+#define ACPI_SYSTEM_FILE_EVENT "event"
+#define ACPI_SYSTEM_FILE_DSDT "dsdt"
+#define ACPI_SYSTEM_FILE_FADT "fadt"
+
+extern FADT_DESCRIPTOR acpi_fadt;
+
+/* --------------------------------------------------------------------------
+ FS Interface (/proc)
+ -------------------------------------------------------------------------- */
+
+static int
+acpi_system_read_info (struct seq_file *seq, void *offset)
+{
+ ACPI_FUNCTION_TRACE("acpi_system_read_info");
+
+ seq_printf(seq, "version: %x\n", ACPI_CA_VERSION);
+ return_VALUE(0);
+}
+
+static int acpi_system_info_open_fs(struct inode *inode, struct file *file)
+{
+ return single_open(file, acpi_system_read_info, PDE(inode)->data);
+}
+
+static struct file_operations acpi_system_info_ops = {
+ .open = acpi_system_info_open_fs,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = single_release,
+};
+
+static ssize_t acpi_system_read_dsdt (struct file*, char __user *, size_t, loff_t*);
+
+static struct file_operations acpi_system_dsdt_ops = {
+ .read = acpi_system_read_dsdt,
+};
+
+static ssize_t
+acpi_system_read_dsdt (
+ struct file *file,
+ char __user *buffer,
+ size_t count,
+ loff_t *ppos)
+{
+ acpi_status status = AE_OK;
+ struct acpi_buffer dsdt = {ACPI_ALLOCATE_BUFFER, NULL};
+ ssize_t res;
+
+ ACPI_FUNCTION_TRACE("acpi_system_read_dsdt");
+
+ status = acpi_get_table(ACPI_TABLE_DSDT, 1, &dsdt);
+ if (ACPI_FAILURE(status))
+ return_VALUE(-ENODEV);
+
+ res = simple_read_from_buffer(buffer, count, ppos,
+ dsdt.pointer, dsdt.length);
+ acpi_os_free(dsdt.pointer);
+
+ return_VALUE(res);
+}
+
+
+static ssize_t acpi_system_read_fadt (struct file*, char __user *, size_t, loff_t*);
+
+static struct file_operations acpi_system_fadt_ops = {
+ .read = acpi_system_read_fadt,
+};
+
+static ssize_t
+acpi_system_read_fadt (
+ struct file *file,
+ char __user *buffer,
+ size_t count,
+ loff_t *ppos)
+{
+ acpi_status status = AE_OK;
+ struct acpi_buffer fadt = {ACPI_ALLOCATE_BUFFER, NULL};
+ ssize_t res;
+
+ ACPI_FUNCTION_TRACE("acpi_system_read_fadt");
+
+ status = acpi_get_table(ACPI_TABLE_FADT, 1, &fadt);
+ if (ACPI_FAILURE(status))
+ return_VALUE(-ENODEV);
+
+ res = simple_read_from_buffer(buffer, count, ppos,
+ fadt.pointer, fadt.length);
+ acpi_os_free(fadt.pointer);
+
+ return_VALUE(res);
+}
+
+
+static int __init acpi_system_init (void)
+{
+ struct proc_dir_entry *entry;
+ int error = 0;
+ char * name;
+
+ ACPI_FUNCTION_TRACE("acpi_system_init");
+
+ if (acpi_disabled)
+ return_VALUE(0);
+
+ /* 'info' [R] */
+ name = ACPI_SYSTEM_FILE_INFO;
+ entry = create_proc_entry(name,
+ S_IRUGO, acpi_root_dir);
+ if (!entry)
+ goto Error;
+ else {
+ entry->proc_fops = &acpi_system_info_ops;
+ }
+
+ /* 'dsdt' [R] */
+ name = ACPI_SYSTEM_FILE_DSDT;
+ entry = create_proc_entry(name, S_IRUSR, acpi_root_dir);
+ if (entry)
+ entry->proc_fops = &acpi_system_dsdt_ops;
+ else
+ goto Error;
+
+ /* 'fadt' [R] */
+ name = ACPI_SYSTEM_FILE_FADT;
+ entry = create_proc_entry(name, S_IRUSR, acpi_root_dir);
+ if (entry)
+ entry->proc_fops = &acpi_system_fadt_ops;
+ else
+ goto Error;
+
+ Done:
+ return_VALUE(error);
+
+ Error:
+ ACPI_DEBUG_PRINT((ACPI_DB_ERROR,
+ "Unable to create '%s' proc fs entry\n", name));
+
+ remove_proc_entry(ACPI_SYSTEM_FILE_FADT, acpi_root_dir);
+ remove_proc_entry(ACPI_SYSTEM_FILE_DSDT, acpi_root_dir);
+ remove_proc_entry(ACPI_SYSTEM_FILE_INFO, acpi_root_dir);
+
+ error = -EFAULT;
+ goto Done;
+}
+
+
+subsys_initcall(acpi_system_init);