/* *  pmtest.c - Driver power management tester * *  Copyright (C) 2000 Andrew Henroid * *  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/module.h>#include <linux/init.h>#include <linux/kernel.h>#include <linux/proc_fs.h>#include <linux/pm.h>#include <asm/uaccess.h>#define PMTEST_MAX_ENTRY 32static struct proc_dir_entry *pmtest_proc = NULL;/* * Handle read from /proc/drivers/pmtest/devices */static int pmtest_devices(char *page,			  char **start,			  off_t offset,			  int count,			  int *eof,			  void *data){	struct pm_dev *pmdev = NULL;	char *i = page;	while ((i - page) < (PAGE_SIZE - PMTEST_MAX_ENTRY))	{		pmdev = pm_find(PM_UNKNOWN_DEV, pmdev);		if (!pmdev)			break;		i += sprintf(i, "%d 0x%lx %d\n",			     pmdev->type,			     pmdev->id,			     pmdev->state);	}	*start = NULL;	*eof = 1;	return (i - page);}/* * Send suspend/resume request to matching devices */static int pmtest_send(int type,		       unsigned long id,		       pm_request_t rqst,		       unsigned long state){	struct pm_dev *pmdev = NULL;	for (;;)	{		pmdev = pm_find(type, pmdev);		if (!pmdev)			break;		if (!id || pmdev->id == id)		{			printk(KERN_INFO "pmtest: %s %d 0x%lx\n",			       state ? "suspending":"resuming",			       pmdev->type,			       pmdev->id);			pm_send(pmdev, rqst, (void*) state);		}	}	return 0;}/* * Handle write to /proc/drivers/pmtest/control */static int pmtest_control(struct file *file,			  const char *buffer,			  unsigned long count,			  void *data){	char info[PMTEST_MAX_ENTRY], *i;	int size, type;	unsigned long id, state;	size = count;	if (size >= sizeof(info))		size = sizeof(info) - 1;	copy_from_user(info, buffer, size);	info[size] = '\0';	i = info + strspn(info, " \t\n");	type = (int) simple_strtoul(i, &i, 0);	i += strspn(i, " \t\n");	id = simple_strtoul(i, &i, 0);	i += strspn(i, " \t\n");	state = simple_strtoul(i, &i, 0);	if(state < 4)		pmtest_send(type, id, state ? PM_SUSPEND:PM_RESUME, state);	return count;}/* * Setup /proc/drivers/pmtest entries */static int pmtest_init(void){	struct proc_dir_entry *entry;	pmtest_proc = proc_mkdir("pmtest", proc_root_driver);	if(pmtest_proc)	{		entry = create_proc_entry("devices", 0, pmtest_proc);		if (entry)			entry->read_proc = pmtest_devices;		entry = create_proc_entry("control", 0, pmtest_proc);		if (entry)			entry->write_proc = pmtest_control;	}	return 0;}/* * Destroy /proc/drivers/pmtest entries */static void pmtest_exit(void){	remove_proc_entry("control", pmtest_proc);	remove_proc_entry("devices", pmtest_proc);	remove_proc_entry("pmtest", proc_root_driver);}module_init(pmtest_init);module_exit(pmtest_exit);