[mirror_ubuntu-zesty-kernel.git] / drivers / staging / i2o / bus-osm.c

/*
 *	Bus Adapter OSM
 *
 *	Copyright (C) 2005	Markus Lidel <Markus.Lidel@shadowconnect.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.
 *
 *	Fixes/additions:
 *		Markus Lidel <Markus.Lidel@shadowconnect.com>
 *			initial version.
 */

#include <linux/module.h>
#include "i2o.h"

#define OSM_NAME	"bus-osm"
#define OSM_VERSION	"1.317"
#define OSM_DESCRIPTION	"I2O Bus Adapter OSM"

static struct i2o_driver i2o_bus_driver;

/* Bus OSM class handling definition */
static struct i2o_class_id i2o_bus_class_id[] = {
	{I2O_CLASS_BUS_ADAPTER},
	{I2O_CLASS_END}
};

/**
 *	i2o_bus_scan - Scan the bus for new devices
 *	@dev: I2O device of the bus, which should be scanned
 *
 *	Scans the bus dev for new / removed devices. After the scan a new LCT
 *	will be fetched automatically.
 *
 *	Returns 0 on success or negative error code on failure.
 */
static int i2o_bus_scan(struct i2o_device *dev)
{
	struct i2o_message *msg;

	msg = i2o_msg_get_wait(dev->iop, I2O_TIMEOUT_MESSAGE_GET);
	if (IS_ERR(msg))
		return -ETIMEDOUT;

	msg->u.head[0] = cpu_to_le32(FIVE_WORD_MSG_SIZE | SGL_OFFSET_0);
	msg->u.head[1] =
	    cpu_to_le32(I2O_CMD_BUS_SCAN << 24 | HOST_TID << 12 | dev->lct_data.
			tid);

	return i2o_msg_post_wait(dev->iop, msg, 60);
};

/**
 *	i2o_bus_store_scan - Scan the I2O Bus Adapter
 *	@d: device which should be scanned
 *	@attr: device_attribute
 *	@buf: output buffer
 *	@count: buffer size
 *
 *	Returns count.
 */
static ssize_t i2o_bus_store_scan(struct device *d,
				  struct device_attribute *attr,
				  const char *buf, size_t count)
{
	struct i2o_device *i2o_dev = to_i2o_device(d);
	int rc;

	if ((rc = i2o_bus_scan(i2o_dev)))
		osm_warn("bus scan failed %d\n", rc);

	return count;
}

/* Bus Adapter OSM device attributes */
static DEVICE_ATTR(scan, S_IWUSR, NULL, i2o_bus_store_scan);

/**
 *	i2o_bus_probe - verify if dev is a I2O Bus Adapter device and install it
 *	@dev: device to verify if it is a I2O Bus Adapter device
 *
 *	Because we want all Bus Adapters always return 0.
 *	Except when we fail.  Then we are sad.
 *
 *	Returns 0, except when we fail to excel.
 */
static int i2o_bus_probe(struct device *dev)
{
	struct i2o_device *i2o_dev = to_i2o_device(get_device(dev));
	int rc;

	rc = device_create_file(dev, &dev_attr_scan);
	if (rc)
		goto err_out;

	osm_info("device added (TID: %03x)\n", i2o_dev->lct_data.tid);

	return 0;

err_out:
	put_device(dev);
	return rc;
};

/**
 *	i2o_bus_remove - remove the I2O Bus Adapter device from the system again
 *	@dev: I2O Bus Adapter device which should be removed
 *
 *	Always returns 0.
 */
static int i2o_bus_remove(struct device *dev)
{
	struct i2o_device *i2o_dev = to_i2o_device(dev);

	device_remove_file(dev, &dev_attr_scan);

	put_device(dev);

	osm_info("device removed (TID: %03x)\n", i2o_dev->lct_data.tid);

	return 0;
};

/* Bus Adapter OSM driver struct */
static struct i2o_driver i2o_bus_driver = {
	.name = OSM_NAME,
	.classes = i2o_bus_class_id,
	.driver = {
		   .probe = i2o_bus_probe,
		   .remove = i2o_bus_remove,
		   },
};

/**
 *	i2o_bus_init - Bus Adapter OSM initialization function
 *
 *	Only register the Bus Adapter OSM in the I2O core.
 *
 *	Returns 0 on success or negative error code on failure.
 */
static int __init i2o_bus_init(void)
{
	int rc;

	printk(KERN_INFO OSM_DESCRIPTION " v" OSM_VERSION "\n");

	/* Register Bus Adapter OSM into I2O core */
	rc = i2o_driver_register(&i2o_bus_driver);
	if (rc) {
		osm_err("Could not register Bus Adapter OSM\n");
		return rc;
	}

	return 0;
};

/**
 *	i2o_bus_exit - Bus Adapter OSM exit function
 *
 *	Unregisters Bus Adapter OSM from I2O core.
 */
static void __exit i2o_bus_exit(void)
{
	i2o_driver_unregister(&i2o_bus_driver);
};

MODULE_AUTHOR("Markus Lidel <Markus.Lidel@shadowconnect.com>");
MODULE_LICENSE("GPL");
MODULE_DESCRIPTION(OSM_DESCRIPTION);
MODULE_VERSION(OSM_VERSION);

module_init(i2o_bus_init);
module_exit(i2o_bus_exit);
Commit	Line	Data
f10378ff ML	1	/*
	2	* Bus Adapter OSM
	3	*
	4	* Copyright (C) 2005 Markus Lidel <Markus.Lidel@shadowconnect.com>
	5	*
	6	* This program is free software; you can redistribute it and/or modify it
	7	* under the terms of the GNU General Public License as published by the
	8	* Free Software Foundation; either version 2 of the License, or (at your
	9	* option) any later version.
	10	*
	11	* Fixes/additions:
	12	* Markus Lidel <Markus.Lidel@shadowconnect.com>
	13	* initial version.
	14	*/
	15
	16	#include <linux/module.h>
2cbf7fe2	17	#include "i2o.h"
f10378ff ML	18
f10378ff ML	19	#define OSM_NAME "bus-osm"
2e1973a3	20	#define OSM_VERSION "1.317"
f10378ff ML	21	#define OSM_DESCRIPTION "I2O Bus Adapter OSM"
	22
	23	static struct i2o_driver i2o_bus_driver;
	24
	25	/* Bus OSM class handling definition */
	26	static struct i2o_class_id i2o_bus_class_id[] = {
	27	{I2O_CLASS_BUS_ADAPTER},
	28	{I2O_CLASS_END}
	29	};
	30
	31	/**
	32	* i2o_bus_scan - Scan the bus for new devices
	33	* @dev: I2O device of the bus, which should be scanned
	34	*
	35	* Scans the bus dev for new / removed devices. After the scan a new LCT
	36	* will be fetched automatically.
	37	*
	38	* Returns 0 on success or negative error code on failure.
	39	*/
	40	static int i2o_bus_scan(struct i2o_device *dev)
	41	{
a1a5ea70	42	struct i2o_message *msg;
f10378ff	43
a1a5ea70 ML	44	msg = i2o_msg_get_wait(dev->iop, I2O_TIMEOUT_MESSAGE_GET);
a1a5ea70 ML	45	if (IS_ERR(msg))
f10378ff ML	46	return -ETIMEDOUT;
f10378ff ML	47
a1a5ea70 ML	48	msg->u.head[0] = cpu_to_le32(FIVE_WORD_MSG_SIZE \| SGL_OFFSET_0);
	49	msg->u.head[1] =
	50	cpu_to_le32(I2O_CMD_BUS_SCAN << 24 \| HOST_TID << 12 \| dev->lct_data.
	51	tid);
f10378ff	52
a1a5ea70	53	return i2o_msg_post_wait(dev->iop, msg, 60);
f10378ff ML	54	};
	55
	56	/**
	57	* i2o_bus_store_scan - Scan the I2O Bus Adapter
	58	* @d: device which should be scanned
d9489fb6 RD	59	* @attr: device_attribute
	60	* @buf: output buffer
	61	* @count: buffer size
f10378ff ML	62	*
	63	* Returns count.
	64	*/
a1a5ea70 ML	65	static ssize_t i2o_bus_store_scan(struct device *d,
	66	struct device_attribute *attr,
	67	const char *buf, size_t count)
f10378ff ML	68	{
	69	struct i2o_device *i2o_dev = to_i2o_device(d);
	70	int rc;
	71
	72	if ((rc = i2o_bus_scan(i2o_dev)))
	73	osm_warn("bus scan failed %d\n", rc);
	74
	75	return count;
	76	}
	77
	78	/* Bus Adapter OSM device attributes */
	79	static DEVICE_ATTR(scan, S_IWUSR, NULL, i2o_bus_store_scan);
	80
	81	/**
	82	* i2o_bus_probe - verify if dev is a I2O Bus Adapter device and install it
	83	* @dev: device to verify if it is a I2O Bus Adapter device
	84	*
	85	* Because we want all Bus Adapters always return 0.
6b5f2967	86	* Except when we fail. Then we are sad.
f10378ff	87	*
6b5f2967	88	* Returns 0, except when we fail to excel.
f10378ff ML	89	*/
	90	static int i2o_bus_probe(struct device *dev)
	91	{
	92	struct i2o_device *i2o_dev = to_i2o_device(get_device(dev));
6b5f2967	93	int rc;
f10378ff	94
6b5f2967 JG	95	rc = device_create_file(dev, &dev_attr_scan);
	96	if (rc)
	97	goto err_out;
f10378ff ML	98
	99	osm_info("device added (TID: %03x)\n", i2o_dev->lct_data.tid);
	100
	101	return 0;
6b5f2967 JG	102
	103	err_out:
	104	put_device(dev);
	105	return rc;
f10378ff ML	106	};
	107
	108	/**
	109	* i2o_bus_remove - remove the I2O Bus Adapter device from the system again
	110	* @dev: I2O Bus Adapter device which should be removed
	111	*
	112	* Always returns 0.
	113	*/
	114	static int i2o_bus_remove(struct device *dev)
	115	{
	116	struct i2o_device *i2o_dev = to_i2o_device(dev);
	117
	118	device_remove_file(dev, &dev_attr_scan);
	119
	120	put_device(dev);
	121
	122	osm_info("device removed (TID: %03x)\n", i2o_dev->lct_data.tid);
	123
	124	return 0;
	125	};
	126
	127	/* Bus Adapter OSM driver struct */
	128	static struct i2o_driver i2o_bus_driver = {
	129	.name = OSM_NAME,
	130	.classes = i2o_bus_class_id,
	131	.driver = {
	132	.probe = i2o_bus_probe,
	133	.remove = i2o_bus_remove,
	134	},
	135	};
	136
	137	/**
	138	* i2o_bus_init - Bus Adapter OSM initialization function
	139	*
	140	* Only register the Bus Adapter OSM in the I2O core.
	141	*
	142	* Returns 0 on success or negative error code on failure.
	143	*/
	144	static int __init i2o_bus_init(void)
	145	{
	146	int rc;
	147
	148	printk(KERN_INFO OSM_DESCRIPTION " v" OSM_VERSION "\n");
	149
	150	/* Register Bus Adapter OSM into I2O core */
	151	rc = i2o_driver_register(&i2o_bus_driver);
	152	if (rc) {
	153	osm_err("Could not register Bus Adapter OSM\n");
	154	return rc;
	155	}
	156
	157	return 0;
	158	};
	159
	160	/**
	161	* i2o_bus_exit - Bus Adapter OSM exit function
	162	*
	163	* Unregisters Bus Adapter OSM from I2O core.
	164	*/
	165	static void __exit i2o_bus_exit(void)
	166	{
	167	i2o_driver_unregister(&i2o_bus_driver);
	168	};
	169
170	MODULE_AUTHOR("Markus Lidel <Markus.Lidel@shadowconnect.com>");
171	MODULE_LICENSE("GPL");
172	MODULE_DESCRIPTION(OSM_DESCRIPTION);
173	MODULE_VERSION(OSM_VERSION);
174
175	module_init(i2o_bus_init);
176	module_exit(i2o_bus_exit);