patch-2.4.6 linux/drivers/acpi/ospm/ac_adapter/ac_osl.c

• Lines: 257
• Date: Wed Jun 20 17:47:40 2001
• Orig file: v2.4.5/linux/drivers/acpi/ospm/ac_adapter/ac_osl.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.4.5/linux/drivers/acpi/ospm/ac_adapter/ac_osl.c linux/drivers/acpi/ospm/ac_adapter/ac_osl.c
@@ -0,0 +1,256 @@
+/*****************************************************************************
+ *
+ * Module Name: ac_osl.c
+ *   $Revision: 7 $
+ *
+ *****************************************************************************/
+
+/*
+ *  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 <acpi.h>
+#include "ac.h"
+
+
+MODULE_AUTHOR("Andrew Grover");
+MODULE_DESCRIPTION("ACPI Component Architecture (CA) - AC Adapter Driver");
+
+
+#define AC_PROC_ROOT		"ac_adapter"
+#define AC_PROC_STATUS		"status"
+#define AC_ON_LINE		"on-line"
+#define AC_OFF_LINE		"off-line"
+
+extern struct proc_dir_entry	*bm_proc_root;
+static struct proc_dir_entry	*ac_proc_root = NULL;
+
+
+/****************************************************************************
+ *
+ * FUNCTION:	ac_osl_proc_read_status
+ *
+ ****************************************************************************/
+
+static int
+ac_osl_proc_read_status (
+	char			*page,
+	char			**start,
+	off_t			off,
+	int 			count,
+	int 			*eof,
+	void			*context)
+{
+	ACPI_STATUS 		status = AE_OK;
+	AC_CONTEXT		*ac_adapter = NULL;
+	char			*p = page;
+	int			len;
+
+	if (!context) {
+		goto end;
+	}
+
+	ac_adapter = (AC_CONTEXT*)context;
+
+	/* don't get status more than once for a single proc read */
+	if (off != 0) {
+		goto end;
+	}
+
+	status = bm_evaluate_simple_integer(ac_adapter->acpi_handle,
+		"_PSR", &(ac_adapter->is_online));
+	if (ACPI_FAILURE(status)) {
+		p += sprintf(p, "Error reading AC Adapter status\n");
+		goto end;
+	}
+
+	if (ac_adapter->is_online) {
+		p += sprintf(p, "Status:                  %s\n", 
+			AC_ON_LINE);
+	}
+	else {
+		p += sprintf(p, "Status:                  %s\n", 
+			AC_OFF_LINE);
+	}
+
+end:
+	len = (p - page);
+	if (len <= off+count) *eof = 1;
+	*start = page + off;
+	len -= off;
+	if (len>count) len = count;
+	if (len<0) len = 0;
+
+	return(len);
+}
+
+
+/****************************************************************************
+ *
+ * FUNCTION:	ac_osl_add_device
+ *
+ ****************************************************************************/
+
+ACPI_STATUS
+ac_osl_add_device(
+	AC_CONTEXT		*ac_adapter)
+{
+	struct proc_dir_entry	*proc_entry = NULL;
+
+	if (!ac_adapter) {
+		return(AE_BAD_PARAMETER);
+	}
+
+	printk(KERN_INFO "AC Adapter: found\n");
+
+	proc_entry = proc_mkdir(ac_adapter->uid, ac_proc_root);
+	if (!proc_entry) {
+		return(AE_ERROR);
+	}
+
+	create_proc_read_entry(AC_PROC_STATUS, S_IFREG | S_IRUGO, 
+		proc_entry, ac_osl_proc_read_status, (void*)ac_adapter);
+
+	return(AE_OK);
+}
+
+
+/****************************************************************************
+ *
+ * FUNCTION:	ac_osl_remove_device
+ *
+ ****************************************************************************/
+
+ACPI_STATUS
+ac_osl_remove_device (
+	AC_CONTEXT		*ac_adapter)
+{
+	char			proc_entry[64];
+
+	if (!ac_adapter) {
+		return(AE_BAD_PARAMETER);
+	}
+
+	sprintf(proc_entry, "%s/%s", ac_adapter->uid, AC_PROC_STATUS);
+	remove_proc_entry(proc_entry, ac_proc_root);
+
+	sprintf(proc_entry, "%s", ac_adapter->uid);
+	remove_proc_entry(proc_entry, ac_proc_root);
+
+	return(AE_OK);
+}
+
+
+/****************************************************************************
+ *
+ * FUNCTION:	ac_osl_generate_event
+ *
+ ****************************************************************************/
+
+ACPI_STATUS
+ac_osl_generate_event (
+	u32			event,
+	AC_CONTEXT		*ac_adapter)
+{
+	ACPI_STATUS		status = AE_OK;
+
+	if (!ac_adapter) {
+		return(AE_BAD_PARAMETER);
+	}
+
+	switch (event) {
+
+	case AC_NOTIFY_STATUS_CHANGE:
+		status = bm_osl_generate_event(ac_adapter->device_handle, 
+			AC_PROC_ROOT, ac_adapter->uid, event, 0);
+		break;
+
+	default:
+		return(AE_BAD_PARAMETER);
+		break;
+	}
+
+	return(status);
+}
+
+
+/****************************************************************************
+ *
+ * FUNCTION:	ac_osl_init
+ *
+ * PARAMETERS:	<none>
+ *
+ * RETURN:	0: Success
+ *
+ * DESCRIPTION: Module initialization.
+ *
+ ****************************************************************************/
+
+static int __init 
+ac_osl_init (void)
+{
+	ACPI_STATUS		status = AE_OK;
+
+	ac_proc_root = proc_mkdir(AC_PROC_ROOT, bm_proc_root);
+	if (!ac_proc_root) {
+		status = AE_ERROR;
+	}
+	else {
+		status = ac_initialize();
+		if (ACPI_FAILURE(status)) {
+			remove_proc_entry(AC_PROC_ROOT, bm_proc_root);
+		}
+
+	}
+
+	return (ACPI_SUCCESS(status)) ? 0 : -ENODEV;
+}
+
+
+/****************************************************************************
+ *
+ * FUNCTION:	ac_osl_cleanup
+ *
+ * PARAMETERS:	<none>
+ *
+ * RETURN:	<none>
+ *
+ * DESCRIPTION: Module cleanup.
+ *
+ ****************************************************************************/
+
+static void __exit 
+ac_osl_cleanup (void)
+{
+	ac_terminate();
+
+	if (ac_proc_root) {
+		remove_proc_entry(AC_PROC_ROOT, bm_proc_root);
+	}
+
+	return;
+}
+
+
+module_init(ac_osl_init);
+module_exit(ac_osl_cleanup);