patch-2.4.6 linux/drivers/acpi/ospm/busmgr/bm_osl.c
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- Lines: 384
- Date:
Wed Jun 20 17:47:40 2001
- Orig file:
v2.4.5/linux/drivers/acpi/ospm/busmgr/bm_osl.c
- Orig date:
Wed Dec 31 16:00:00 1969
diff -u --recursive --new-file v2.4.5/linux/drivers/acpi/ospm/busmgr/bm_osl.c linux/drivers/acpi/ospm/busmgr/bm_osl.c
@@ -0,0 +1,383 @@
+/*****************************************************************************
+ *
+ * Module Name: bm_osl.c
+ * $Revision: 11 $
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000, 2001 Andrew Grover
+ *
+ * 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/kernel.h>
+#include <linux/module.h>
+#include <linux/init.h>
+#include <linux/types.h>
+#include <linux/proc_fs.h>
+#include <linux/spinlock.h>
+#include <asm/uaccess.h>
+#include <acpi.h>
+#include "bm.h"
+
+
+MODULE_AUTHOR("Andrew Grover");
+MODULE_DESCRIPTION("ACPI Component Architecture (CA) - ACPI Bus Manager");
+
+
+#ifdef ACPI_DEBUG
+
+static int dbg_layer = ACPI_COMPONENT_DEFAULT;
+MODULE_PARM(dbg_layer, "i");
+MODULE_PARM_DESC(dbg_layer, "Controls debug output (see acpi_dbg_layer).\n");
+
+static int dbg_level = DEBUG_DEFAULT;
+MODULE_PARM(dbg_level, "i");
+MODULE_PARM_DESC(dbg_level, "Controls debug output (see acpi_dbg_level).\n");
+
+#endif /*ACPI_DEBUG*/
+
+
+/*****************************************************************************
+ * Types & Defines
+ *****************************************************************************/
+
+typedef struct
+{
+ BM_HANDLE device_handle;
+ char *device_type;
+ char *device_instance;
+ u32 event_type;
+ u32 event_data;
+ struct list_head list;
+} BM_OSL_EVENT;
+
+
+#define BM_PROC_ROOT "acpi"
+#define BM_PROC_EVENT "event"
+#define BM_PROC_DEVICES "devices"
+
+#define BM_MAX_STRING_LENGTH 80
+
+
+/****************************************************************************
+ * Globals
+ ****************************************************************************/
+
+struct proc_dir_entry *bm_proc_root = NULL;
+static struct proc_dir_entry *bm_proc_event = NULL;
+
+#ifdef ACPI_DEBUG
+static u32 save_dbg_layer;
+static u32 save_dbg_level;
+#endif /*ACPI_DEBUG*/
+
+extern BM_NODE_LIST node_list;
+
+static spinlock_t bm_osl_event_lock = SPIN_LOCK_UNLOCKED;
+
+static LIST_HEAD(bm_event_list);
+
+static DECLARE_WAIT_QUEUE_HEAD(bm_event_wait_queue);
+
+static int event_is_open = 0;
+
+
+/****************************************************************************
+ * Functions
+ ****************************************************************************/
+
+/****************************************************************************
+ *
+ * FUNCTION: bm_osl_generate_event
+ *
+ * DESCRIPTION: Generates an event for user-space consumption by writing
+ * the event data to the 'event' file.
+ *
+ ****************************************************************************/
+
+ACPI_STATUS
+bm_osl_generate_event (
+ BM_HANDLE device_handle,
+ char *device_type,
+ char *device_instance,
+ u32 event_type,
+ u32 event_data)
+{
+ BM_OSL_EVENT *event = NULL;
+ u32 flags = 0;
+
+ /* drop event on the floor if no one's listening */
+ if (!event_is_open)
+ return (AE_OK);
+
+ /*
+ * Allocate a new event structure.
+ */
+ event = acpi_os_callocate(sizeof(BM_OSL_EVENT));
+ if (!event)
+ goto alloc_error;
+
+ event->device_type = acpi_os_callocate(strlen(device_type)
+ + sizeof(char));
+ if (!event->device_type)
+ goto alloc_error;
+
+ event->device_instance = acpi_os_callocate(strlen(device_instance)
+ + sizeof(char));
+ if (!event->device_instance)
+ goto alloc_error;
+
+ /*
+ * Set event data.
+ */
+ event->device_handle = device_handle;
+ strcpy(event->device_type, device_type);
+ strcpy(event->device_instance, device_instance);
+ event->event_type = event_type;
+ event->event_data = event_data;
+
+ /*
+ * Add to the end of our event list.
+ */
+ spin_lock_irqsave(&bm_osl_event_lock, flags);
+ list_add_tail(&event->list, &bm_event_list);
+ spin_unlock_irqrestore(&bm_osl_event_lock, flags);
+
+ /*
+ * Signal waiting threads (if any).
+ */
+ wake_up_interruptible(&bm_event_wait_queue);
+
+ return(AE_OK);
+
+alloc_error:
+ if (event->device_instance)
+ acpi_os_free(event->device_instance);
+
+ if (event->device_type)
+ acpi_os_free(event->device_type);
+
+ if (event)
+ acpi_os_free(event);
+
+ return (AE_NO_MEMORY);
+}
+
+static int bm_osl_open_event(struct inode *inode, struct file *file)
+{
+ spin_lock_irq (&bm_osl_event_lock);
+
+ if(event_is_open)
+ goto out_busy;
+
+ event_is_open = 1;
+
+ spin_unlock_irq (&bm_osl_event_lock);
+ return 0;
+
+out_busy:
+ spin_unlock_irq (&bm_osl_event_lock);
+ return -EBUSY;
+}
+
+
+static int bm_osl_close_event(struct inode *inode, struct file *file)
+{
+ event_is_open = 0;
+ return 0;
+}
+
+/****************************************************************************
+ *
+ * FUNCTION: bm_osl_read_event
+ *
+ * DESCRIPTION: Handles reads to the 'event' file by blocking user-mode
+ * threads until data (an event) is generated.
+ *
+ ****************************************************************************/
+static ssize_t
+bm_osl_read_event(
+ struct file *file,
+ char *buf,
+ size_t count,
+ loff_t *ppos)
+{
+ char str[BM_MAX_STRING_LENGTH];
+ int size;
+ BM_OSL_EVENT *event = NULL;
+ unsigned long flags = 0;
+
+ DECLARE_WAITQUEUE(wait, current);
+
+ if (count < BM_MAX_STRING_LENGTH) {
+ return 0;
+ }
+
+ if (list_empty(&bm_event_list)) {
+
+ set_current_state(TASK_INTERRUPTIBLE);
+ add_wait_queue(&bm_event_wait_queue, &wait);
+
+ if (list_empty(&bm_event_list)) {
+ schedule();
+ }
+
+ remove_wait_queue(&bm_event_wait_queue, &wait);
+ set_current_state(TASK_RUNNING);
+
+ if (signal_pending(current)) {
+ return -ERESTARTSYS;
+ }
+ }
+
+ spin_lock_irqsave(&bm_osl_event_lock, flags);
+ event = list_entry(bm_event_list.next, BM_OSL_EVENT, list);
+ list_del(&event->list);
+ spin_unlock_irqrestore(&bm_osl_event_lock, flags);
+
+ /* BUG: buffer overrun? */
+ size = sprintf(str, "%s %s %08x %08x\n",
+ event->device_type, event->device_instance,
+ event->event_type, event->event_data);
+
+ acpi_os_free(event->device_type);
+ acpi_os_free(event->device_instance);
+ acpi_os_free(event);
+
+ if (copy_to_user(buf, str, size))
+ return -EFAULT;
+
+ *ppos += size;
+
+ return size;
+}
+
+struct file_operations proc_event_operations = {
+ open: bm_osl_open_event,
+ read: bm_osl_read_event,
+ release: bm_osl_close_event,
+};
+
+/****************************************************************************
+ *
+ * FUNCTION: bm_osl_init
+ *
+ ****************************************************************************/
+
+int
+bm_osl_init(void)
+{
+ ACPI_STATUS status = AE_OK;
+
+#ifdef ACPI_DEBUG
+ save_dbg_layer = acpi_dbg_layer;
+ acpi_dbg_layer = dbg_layer;
+
+ save_dbg_level = acpi_dbg_level;
+ acpi_dbg_level = dbg_level;
+#endif /*ACPI_DEBUG*/
+
+ bm_proc_root = proc_mkdir(BM_PROC_ROOT, NULL);
+ if (!bm_proc_root) {
+ return(AE_ERROR);
+ }
+
+ bm_proc_event = create_proc_entry(BM_PROC_EVENT, S_IRUSR, bm_proc_root);
+ if (bm_proc_event) {
+ bm_proc_event->proc_fops = &proc_event_operations;
+ }
+
+ status = bm_initialize();
+
+ return (ACPI_SUCCESS(status)) ? 0 : -ENODEV;
+}
+
+
+/****************************************************************************
+ *
+ * FUNCTION: bm_osl_cleanup
+ *
+ ****************************************************************************/
+
+void
+bm_osl_cleanup(void)
+{
+ bm_terminate();
+
+ if (bm_proc_event) {
+ remove_proc_entry(BM_PROC_EVENT, bm_proc_root);
+ bm_proc_event = NULL;
+ }
+
+ if (bm_proc_root) {
+ remove_proc_entry(BM_PROC_ROOT, NULL);
+ bm_proc_root = NULL;
+ }
+
+#ifdef ACPI_DEBUG
+ acpi_dbg_layer = save_dbg_layer;
+ acpi_dbg_level = save_dbg_level;
+#endif /*ACPI_DEBUG*/
+
+ return;
+}
+
+
+module_init(bm_osl_init);
+module_exit(bm_osl_cleanup);
+
+
+/****************************************************************************
+ * Symbols
+ ****************************************************************************/
+
+/* bm.c */
+
+EXPORT_SYMBOL(bm_get_node);
+
+/* bmdriver.c */
+
+EXPORT_SYMBOL(bm_get_device_power_state);
+EXPORT_SYMBOL(bm_set_device_power_state);
+EXPORT_SYMBOL(bm_get_device_info);
+EXPORT_SYMBOL(bm_get_device_status);
+EXPORT_SYMBOL(bm_get_device_context);
+EXPORT_SYMBOL(bm_register_driver);
+EXPORT_SYMBOL(bm_unregister_driver);
+
+/* bmsearch.c */
+
+EXPORT_SYMBOL(bm_search);
+
+/* bmrequest.c */
+
+EXPORT_SYMBOL(bm_request);
+
+/* bmutils.c */
+
+EXPORT_SYMBOL(bm_extract_package_data);
+EXPORT_SYMBOL(bm_evaluate_object);
+EXPORT_SYMBOL(bm_evaluate_simple_integer);
+EXPORT_SYMBOL(bm_evaluate_reference_list);
+EXPORT_SYMBOL(bm_copy_to_buffer);
+EXPORT_SYMBOL(bm_cast_buffer);
+
+/* bm_proc.c */
+
+EXPORT_SYMBOL(bm_osl_generate_event);
+EXPORT_SYMBOL(bm_proc_root);
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