/* * arch/sh/kernel/cpu/bus.c * * Virtual bus for SuperH. * * Copyright (C) 2004 Paul Mundt * * Shamelessly cloned from arch/arm/mach-omap/bus.c, which was written * by: * *  	Copyright (C) 2003 - 2004 Nokia Corporation *  	Written by Tony Lindgren <tony@atomide.com> *  	Portions of code based on sa1111.c. * * 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. */#include <linux/kernel.h>#include <linux/device.h>#include <linux/init.h>#include <linux/module.h>#include <asm/bus-sh.h>static int sh_bus_match(struct device *dev, struct device_driver *drv){	struct sh_driver *shdrv = to_sh_driver(drv);	struct sh_dev *shdev = to_sh_dev(dev);	return shdev->dev_id == shdrv->dev_id;}static int sh_bus_suspend(struct device *dev, pm_message_t state){	struct sh_dev *shdev = to_sh_dev(dev);	struct sh_driver *shdrv = to_sh_driver(dev->driver);	if (shdrv && shdrv->suspend)		return shdrv->suspend(shdev, state);	return 0;}static int sh_bus_resume(struct device *dev){	struct sh_dev *shdev = to_sh_dev(dev);	struct sh_driver *shdrv = to_sh_driver(dev->driver);	if (shdrv && shdrv->resume)		return shdrv->resume(shdev);	return 0;}static struct device sh_bus_devices[SH_NR_BUSES] = {	{		.bus_id		= SH_BUS_NAME_VIRT,	},};struct bus_type sh_bus_types[SH_NR_BUSES] = {	{		.name		= SH_BUS_NAME_VIRT,		.match		= sh_bus_match,		.suspend	= sh_bus_suspend,		.resume		= sh_bus_resume,	},};static int sh_device_probe(struct device *dev){	struct sh_dev *shdev = to_sh_dev(dev);	struct sh_driver *shdrv = to_sh_driver(dev->driver);	if (shdrv && shdrv->probe)		return shdrv->probe(shdev);	return -ENODEV;}static int sh_device_remove(struct device *dev){	struct sh_dev *shdev = to_sh_dev(dev);	struct sh_driver *shdrv = to_sh_driver(dev->driver);	if (shdrv && shdrv->remove)		return shdrv->remove(shdev);	return 0;}int sh_device_register(struct sh_dev *dev){	if (!dev)		return -EINVAL;	if (dev->bus_id < 0 || dev->bus_id >= SH_NR_BUSES) {		printk(KERN_ERR "%s: bus_id invalid: %s bus: %d\n",		       __FUNCTION__, dev->name, dev->bus_id);		return -EINVAL;	}	dev->dev.parent = &sh_bus_devices[dev->bus_id];	dev->dev.bus    = &sh_bus_types[dev->bus_id];	/* This is needed for USB OHCI to work */	if (dev->dma_mask)		dev->dev.dma_mask = dev->dma_mask;	snprintf(dev->dev.bus_id, BUS_ID_SIZE, "%s%u",		 dev->name, dev->dev_id);	printk(KERN_INFO "Registering SH device '%s'. Parent at %s\n",	       dev->dev.bus_id, dev->dev.parent->bus_id);	return device_register(&dev->dev);}void sh_device_unregister(struct sh_dev *dev){	device_unregister(&dev->dev);}int sh_driver_register(struct sh_driver *drv){	if (!drv)		return -EINVAL;	if (drv->bus_id < 0 || drv->bus_id >= SH_NR_BUSES) {		printk(KERN_ERR "%s: bus_id invalid: bus: %d device %d\n",		       __FUNCTION__, drv->bus_id, drv->dev_id);		return -EINVAL;	}	drv->drv.probe  = sh_device_probe;	drv->drv.remove = sh_device_remove;	drv->drv.bus    = &sh_bus_types[drv->bus_id];	return driver_register(&drv->drv);}void sh_driver_unregister(struct sh_driver *drv){	driver_unregister(&drv->drv);}static int __init sh_bus_init(void){	int i, ret = 0;	for (i = 0; i < SH_NR_BUSES; i++) {		ret = device_register(&sh_bus_devices[i]);		if (ret != 0) {			printk(KERN_ERR "Unable to register bus device %s\n",			       sh_bus_devices[i].bus_id);			continue;		}		ret = bus_register(&sh_bus_types[i]);		if (ret != 0) {			printk(KERN_ERR "Unable to register bus %s\n",			       sh_bus_types[i].name);			device_unregister(&sh_bus_devices[i]);		}	}	printk(KERN_INFO "SH Virtual Bus initialized\n");	return ret;}static void __exit sh_bus_exit(void){	int i;	for (i = 0; i < SH_NR_BUSES; i++) {		bus_unregister(&sh_bus_types[i]);		device_unregister(&sh_bus_devices[i]);	}}module_init(sh_bus_init);module_exit(sh_bus_exit);MODULE_AUTHOR("Paul Mundt <lethal@linux-sh.org>");MODULE_DESCRIPTION("SH Virtual Bus");MODULE_LICENSE("GPL");EXPORT_SYMBOL(sh_bus_types);EXPORT_SYMBOL(sh_device_register);EXPORT_SYMBOL(sh_device_unregister);EXPORT_SYMBOL(sh_driver_register);EXPORT_SYMBOL(sh_driver_unregister);