[deliverable/linux.git] / arch / powerpc / kernel / ibmebus.c

/*
 * IBM PowerPC IBM eBus Infrastructure Support.
 *
 * Copyright (c) 2005 IBM Corporation
 *  Joachim Fenkes <fenkes@de.ibm.com>
 *  Heiko J Schick <schickhj@de.ibm.com>
 *
 * All rights reserved.
 *
 * This source code is distributed under a dual license of GPL v2.0 and OpenIB
 * BSD.
 *
 * OpenIB BSD License
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are met:
 *
 * Redistributions of source code must retain the above copyright notice, this
 * list of conditions and the following disclaimer.
 *
 * Redistributions in binary form must reproduce the above copyright notice,
 * this list of conditions and the following disclaimer in the documentation
 * and/or other materials
 * provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
 * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
 * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
 * IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
 * POSSIBILITY OF SUCH DAMAGE.
 */

#include <linux/init.h>
#include <linux/console.h>
#include <linux/kobject.h>
#include <linux/dma-mapping.h>
#include <linux/interrupt.h>
#include <linux/of.h>
#include <linux/slab.h>
#include <linux/of_platform.h>
#include <asm/ibmebus.h>
#include <asm/abs_addr.h>

static struct device ibmebus_bus_device = { /* fake "parent" device */
	.init_name = "ibmebus",
};

struct bus_type ibmebus_bus_type;

/* These devices will automatically be added to the bus during init */
static struct of_device_id __initdata ibmebus_matches[] = {
	{ .compatible = "IBM,lhca" },
	{ .compatible = "IBM,lhea" },
	{},
};

static void *ibmebus_alloc_coherent(struct device *dev,
				    size_t size,
				    dma_addr_t *dma_handle,
				    gfp_t flag)
{
	void *mem;

	mem = kmalloc(size, flag);
	*dma_handle = (dma_addr_t)mem;

	return mem;
}

static void ibmebus_free_coherent(struct device *dev,
				  size_t size, void *vaddr,
				  dma_addr_t dma_handle)
{
	kfree(vaddr);
}

static dma_addr_t ibmebus_map_page(struct device *dev,
				   struct page *page,
				   unsigned long offset,
				   size_t size,
				   enum dma_data_direction direction,
				   struct dma_attrs *attrs)
{
	return (dma_addr_t)(page_address(page) + offset);
}

static void ibmebus_unmap_page(struct device *dev,
			       dma_addr_t dma_addr,
			       size_t size,
			       enum dma_data_direction direction,
			       struct dma_attrs *attrs)
{
	return;
}

static int ibmebus_map_sg(struct device *dev,
			  struct scatterlist *sgl,
			  int nents, enum dma_data_direction direction,
			  struct dma_attrs *attrs)
{
	struct scatterlist *sg;
	int i;

	for_each_sg(sgl, sg, nents, i) {
		sg->dma_address = (dma_addr_t) sg_virt(sg);
		sg->dma_length = sg->length;
	}

	return nents;
}

static void ibmebus_unmap_sg(struct device *dev,
			     struct scatterlist *sg,
			     int nents, enum dma_data_direction direction,
			     struct dma_attrs *attrs)
{
	return;
}

static int ibmebus_dma_supported(struct device *dev, u64 mask)
{
	return 1;
}

static struct dma_map_ops ibmebus_dma_ops = {
	.alloc_coherent = ibmebus_alloc_coherent,
	.free_coherent  = ibmebus_free_coherent,
	.map_sg         = ibmebus_map_sg,
	.unmap_sg       = ibmebus_unmap_sg,
	.dma_supported  = ibmebus_dma_supported,
	.map_page       = ibmebus_map_page,
	.unmap_page     = ibmebus_unmap_page,
};

static int ibmebus_match_path(struct device *dev, void *data)
{
	struct device_node *dn = to_platform_device(dev)->dev.of_node;
	return (dn->full_name &&
		(strcasecmp((char *)data, dn->full_name) == 0));
}

static int ibmebus_match_node(struct device *dev, void *data)
{
	return to_platform_device(dev)->dev.of_node == data;
}

static int ibmebus_create_device(struct device_node *dn)
{
	struct platform_device *dev;
	int ret;

	dev = of_device_alloc(dn, NULL, &ibmebus_bus_device);
	if (!dev)
		return -ENOMEM;

	dev->dev.bus = &ibmebus_bus_type;
	dev->dev.archdata.dma_ops = &ibmebus_dma_ops;

	ret = of_device_add(dev);
	if (ret)
		platform_device_put(dev);
	return ret;
}

static int ibmebus_create_devices(const struct of_device_id *matches)
{
	struct device_node *root, *child;
	int ret = 0;

	root = of_find_node_by_path("/");

	for_each_child_of_node(root, child) {
		if (!of_match_node(matches, child))
			continue;

		if (bus_find_device(&ibmebus_bus_type, NULL, child,
				    ibmebus_match_node))
			continue;

		ret = ibmebus_create_device(child);
		if (ret) {
			printk(KERN_ERR "%s: failed to create device (%i)",
			       __func__, ret);
			of_node_put(child);
			break;
		}
	}

	of_node_put(root);
	return ret;
}

int ibmebus_register_driver(struct of_platform_driver *drv)
{
	/* If the driver uses devices that ibmebus doesn't know, add them */
	ibmebus_create_devices(drv->driver.of_match_table);

	return of_register_driver(drv, &ibmebus_bus_type);
}
EXPORT_SYMBOL(ibmebus_register_driver);

void ibmebus_unregister_driver(struct of_platform_driver *drv)
{
	of_unregister_driver(drv);
}
EXPORT_SYMBOL(ibmebus_unregister_driver);

int ibmebus_request_irq(u32 ist, irq_handler_t handler,
			unsigned long irq_flags, const char *devname,
			void *dev_id)
{
	unsigned int irq = irq_create_mapping(NULL, ist);

	if (irq == NO_IRQ)
		return -EINVAL;

	return request_irq(irq, handler, irq_flags, devname, dev_id);
}
EXPORT_SYMBOL(ibmebus_request_irq);

void ibmebus_free_irq(u32 ist, void *dev_id)
{
	unsigned int irq = irq_find_mapping(NULL, ist);

	free_irq(irq, dev_id);
	irq_dispose_mapping(irq);
}
EXPORT_SYMBOL(ibmebus_free_irq);

static char *ibmebus_chomp(const char *in, size_t count)
{
	char *out = kmalloc(count + 1, GFP_KERNEL);

	if (!out)
		return NULL;

	memcpy(out, in, count);
	out[count] = '\0';
	if (out[count - 1] == '\n')
		out[count - 1] = '\0';

	return out;
}

static ssize_t ibmebus_store_probe(struct bus_type *bus,
				   const char *buf, size_t count)
{
	struct device_node *dn = NULL;
	char *path;
	ssize_t rc = 0;

	path = ibmebus_chomp(buf, count);
	if (!path)
		return -ENOMEM;

	if (bus_find_device(&ibmebus_bus_type, NULL, path,
			    ibmebus_match_path)) {
		printk(KERN_WARNING "%s: %s has already been probed\n",
		       __func__, path);
		rc = -EEXIST;
		goto out;
	}

	if ((dn = of_find_node_by_path(path))) {
		rc = ibmebus_create_device(dn);
		of_node_put(dn);
	} else {
		printk(KERN_WARNING "%s: no such device node: %s\n",
		       __func__, path);
		rc = -ENODEV;
	}

out:
	kfree(path);
	if (rc)
		return rc;
	return count;
}

static ssize_t ibmebus_store_remove(struct bus_type *bus,
				    const char *buf, size_t count)
{
	struct device *dev;
	char *path;

	path = ibmebus_chomp(buf, count);
	if (!path)
		return -ENOMEM;

	if ((dev = bus_find_device(&ibmebus_bus_type, NULL, path,
				   ibmebus_match_path))) {
		of_device_unregister(to_platform_device(dev));

		kfree(path);
		return count;
	} else {
		printk(KERN_WARNING "%s: %s not on the bus\n",
		       __func__, path);

		kfree(path);
		return -ENODEV;
	}
}

static struct bus_attribute ibmebus_bus_attrs[] = {
	__ATTR(probe, S_IWUSR, NULL, ibmebus_store_probe),
	__ATTR(remove, S_IWUSR, NULL, ibmebus_store_remove),
	__ATTR_NULL
};

struct bus_type ibmebus_bus_type = {
	.uevent    = of_device_uevent,
	.bus_attrs = ibmebus_bus_attrs
};
EXPORT_SYMBOL(ibmebus_bus_type);

static int __init ibmebus_bus_init(void)
{
	int err;

	printk(KERN_INFO "IBM eBus Device Driver\n");

	err = of_bus_type_init(&ibmebus_bus_type, "ibmebus");
	if (err) {
		printk(KERN_ERR "%s: failed to register IBM eBus.\n",
		       __func__);
		return err;
	}

	err = device_register(&ibmebus_bus_device);
	if (err) {
		printk(KERN_WARNING "%s: device_register returned %i\n",
		       __func__, err);
		bus_unregister(&ibmebus_bus_type);

		return err;
	}

	err = ibmebus_create_devices(ibmebus_matches);
	if (err) {
		device_unregister(&ibmebus_bus_device);
		bus_unregister(&ibmebus_bus_type);
		return err;
	}

	return 0;
}
postcore_initcall(ibmebus_bus_init);
Commit	Line	Data
d7a30103 HS	1	/*
	2	* IBM PowerPC IBM eBus Infrastructure Support.
	3	*
	4	* Copyright (c) 2005 IBM Corporation
6bccf755	5	* Joachim Fenkes <fenkes@de.ibm.com>
d7a30103	6	* Heiko J Schick <schickhj@de.ibm.com>
a8308800	7	*
d7a30103 HS	8	* All rights reserved.
d7a30103 HS	9	*
a8308800 JF	10	* This source code is distributed under a dual license of GPL v2.0 and OpenIB
a8308800 JF	11	* BSD.
d7a30103 HS	12	*
	13	* OpenIB BSD License
	14	*
a8308800 JF	15	* Redistribution and use in source and binary forms, with or without
a8308800 JF	16	* modification, are permitted provided that the following conditions are met:
d7a30103	17	*
a8308800 JF	18	* Redistributions of source code must retain the above copyright notice, this
a8308800 JF	19	* list of conditions and the following disclaimer.
d7a30103	20	*
a8308800 JF	21	* Redistributions in binary form must reproduce the above copyright notice,
a8308800 JF	22	* this list of conditions and the following disclaimer in the documentation
d7a30103	23	* and/or other materials
a8308800	24	* provided with the distribution.
d7a30103	25	*
a8308800 JF	26	* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
	27	* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	28	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	29	* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
	30	* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
	31	* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
d7a30103 HS	32	* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
d7a30103 HS	33	* BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER
a8308800 JF	34	* IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
a8308800 JF	35	* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
d7a30103 HS	36	* POSSIBILITY OF SUCH DAMAGE.
	37	*/
	38
	39	#include <linux/init.h>
	40	#include <linux/console.h>
	41	#include <linux/kobject.h>
	42	#include <linux/dma-mapping.h>
	43	#include <linux/interrupt.h>
283029d1	44	#include <linux/of.h>
5a0e3ad6	45	#include <linux/slab.h>
a988c0a6	46	#include <linux/of_platform.h>
d7a30103 HS	47	#include <asm/ibmebus.h>
	48	#include <asm/abs_addr.h>
	49
6bccf755	50	static struct device ibmebus_bus_device = { /* fake "parent" device */
aab0d375	51	.init_name = "ibmebus",
d7a30103 HS	52	};
d7a30103 HS	53
6bccf755 JF	54	struct bus_type ibmebus_bus_type;
6bccf755 JF	55
55347cc9	56	/* These devices will automatically be added to the bus during init */
1b17adf1	57	static struct of_device_id __initdata ibmebus_matches[] = {
55347cc9 JF	58	{ .compatible = "IBM,lhca" },
	59	{ .compatible = "IBM,lhea" },
	60	{},
	61	};
	62
d7a30103 HS	63	static void ibmebus_alloc_coherent(struct device dev,
	64	size_t size,
	65	dma_addr_t *dma_handle,
	66	gfp_t flag)
	67	{
	68	void *mem;
a8308800	69
d7a30103 HS	70	mem = kmalloc(size, flag);
	71	*dma_handle = (dma_addr_t)mem;
	72
	73	return mem;
	74	}
	75
	76	static void ibmebus_free_coherent(struct device *dev,
a8308800	77	size_t size, void *vaddr,
d7a30103 HS	78	dma_addr_t dma_handle)
	79	{
	80	kfree(vaddr);
	81	}
	82
f9226d57 MN	83	static dma_addr_t ibmebus_map_page(struct device *dev,
	84	struct page *page,
	85	unsigned long offset,
	86	size_t size,
	87	enum dma_data_direction direction,
	88	struct dma_attrs *attrs)
d7a30103	89	{
f9226d57	90	return (dma_addr_t)(page_address(page) + offset);
d7a30103 HS	91	}
d7a30103 HS	92
f9226d57 MN	93	static void ibmebus_unmap_page(struct device *dev,
	94	dma_addr_t dma_addr,
	95	size_t size,
	96	enum dma_data_direction direction,
	97	struct dma_attrs *attrs)
d7a30103 HS	98	{
	99	return;
	100	}
	101
	102	static int ibmebus_map_sg(struct device *dev,
78bdc310	103	struct scatterlist *sgl,
3affedc4 MN	104	int nents, enum dma_data_direction direction,
3affedc4 MN	105	struct dma_attrs *attrs)
d7a30103	106	{
78bdc310	107	struct scatterlist *sg;
d7a30103	108	int i;
a8308800	109
78bdc310	110	for_each_sg(sgl, sg, nents, i) {
58b053e4	111	sg->dma_address = (dma_addr_t) sg_virt(sg);
78bdc310	112	sg->dma_length = sg->length;
d7a30103	113	}
a8308800	114
d7a30103 HS	115	return nents;
	116	}
	117
	118	static void ibmebus_unmap_sg(struct device *dev,
	119	struct scatterlist *sg,
3affedc4 MN	120	int nents, enum dma_data_direction direction,
3affedc4 MN	121	struct dma_attrs *attrs)
d7a30103 HS	122	{
	123	return;
	124	}
	125
	126	static int ibmebus_dma_supported(struct device *dev, u64 mask)
	127	{
	128	return 1;
	129	}
	130
45223c54	131	static struct dma_map_ops ibmebus_dma_ops = {
d7a30103 HS	132	.alloc_coherent = ibmebus_alloc_coherent,
d7a30103 HS	133	.free_coherent = ibmebus_free_coherent,
d7a30103 HS	134	.map_sg = ibmebus_map_sg,
	135	.unmap_sg = ibmebus_unmap_sg,
	136	.dma_supported = ibmebus_dma_supported,
f9226d57 MN	137	.map_page = ibmebus_map_page,
f9226d57 MN	138	.unmap_page = ibmebus_unmap_page,
d7a30103 HS	139	};
d7a30103 HS	140
55347cc9 JF	141	static int ibmebus_match_path(struct device dev, void data)
55347cc9 JF	142	{
a454dc50	143	struct device_node *dn = to_platform_device(dev)->dev.of_node;
55347cc9 JF	144	return (dn->full_name &&
	145	(strcasecmp((char *)data, dn->full_name) == 0));
	146	}
	147
	148	static int ibmebus_match_node(struct device dev, void data)
	149	{
a454dc50	150	return to_platform_device(dev)->dev.of_node == data;
55347cc9 JF	151	}
	152
	153	static int ibmebus_create_device(struct device_node *dn)
	154	{
a454dc50	155	struct platform_device *dev;
55347cc9 JF	156	int ret;
	157
	158	dev = of_device_alloc(dn, NULL, &ibmebus_bus_device);
	159	if (!dev)
	160	return -ENOMEM;
	161
	162	dev->dev.bus = &ibmebus_bus_type;
	163	dev->dev.archdata.dma_ops = &ibmebus_dma_ops;
	164
7096d042 GL	165	ret = of_device_add(dev);
	166	if (ret)
	167	platform_device_put(dev);
	168	return ret;
55347cc9 JF	169	}
	170
	171	static int ibmebus_create_devices(const struct of_device_id *matches)
	172	{
	173	struct device_node root, child;
	174	int ret = 0;
	175
	176	root = of_find_node_by_path("/");
	177
85e99b9f	178	for_each_child_of_node(root, child) {
55347cc9 JF	179	if (!of_match_node(matches, child))
	180	continue;
	181
	182	if (bus_find_device(&ibmebus_bus_type, NULL, child,
	183	ibmebus_match_node))
	184	continue;
	185
	186	ret = ibmebus_create_device(child);
	187	if (ret) {
	188	printk(KERN_ERR "%s: failed to create device (%i)",
e48b1b45	189	__func__, ret);
55347cc9 JF	190	of_node_put(child);
	191	break;
	192	}
	193	}
	194
	195	of_node_put(root);
	196	return ret;
	197	}
	198
6b08f3ae	199	int ibmebus_register_driver(struct of_platform_driver *drv)
d7a30103	200	{
6b08f3ae	201	/* If the driver uses devices that ibmebus doesn't know, add them */
597b9d1e	202	ibmebus_create_devices(drv->driver.of_match_table);
6b08f3ae	203
745c2ef2	204	return of_register_driver(drv, &ibmebus_bus_type);
d7a30103 HS	205	}
	206	EXPORT_SYMBOL(ibmebus_register_driver);
	207
6b08f3ae	208	void ibmebus_unregister_driver(struct of_platform_driver *drv)
a8308800	209	{
745c2ef2	210	of_unregister_driver(drv);
d7a30103 HS	211	}
	212	EXPORT_SYMBOL(ibmebus_unregister_driver);
	213
6b08f3ae JF	214	int ibmebus_request_irq(u32 ist, irq_handler_t handler,
6b08f3ae JF	215	unsigned long irq_flags, const char *devname,
d7a30103 HS	216	void *dev_id)
d7a30103 HS	217	{
6e99e458	218	unsigned int irq = irq_create_mapping(NULL, ist);
a8308800	219
d7a30103 HS	220	if (irq == NO_IRQ)
d7a30103 HS	221	return -EINVAL;
a8308800	222
6b08f3ae	223	return request_irq(irq, handler, irq_flags, devname, dev_id);
d7a30103 HS	224	}
	225	EXPORT_SYMBOL(ibmebus_request_irq);
	226
6b08f3ae	227	void ibmebus_free_irq(u32 ist, void *dev_id)
d7a30103	228	{
0ebfff14	229	unsigned int irq = irq_find_mapping(NULL, ist);
a8308800	230
d7a30103	231	free_irq(irq, dev_id);
6358d6cb	232	irq_dispose_mapping(irq);
d7a30103 HS	233	}
	234	EXPORT_SYMBOL(ibmebus_free_irq);
	235
0727702a JF	236	static char ibmebus_chomp(const char in, size_t count)
0727702a JF	237	{
61a564fd JJ	238	char *out = kmalloc(count + 1, GFP_KERNEL);
61a564fd JJ	239
0727702a JF	240	if (!out)
	241	return NULL;
	242
	243	memcpy(out, in, count);
	244	out[count] = '\0';
	245	if (out[count - 1] == '\n')
	246	out[count - 1] = '\0';
	247
	248	return out;
6bccf755 JF	249	}
	250
	251	static ssize_t ibmebus_store_probe(struct bus_type *bus,
	252	const char *buf, size_t count)
	253	{
	254	struct device_node *dn = NULL;
0727702a	255	char *path;
55347cc9	256	ssize_t rc = 0;
0727702a JF	257
	258	path = ibmebus_chomp(buf, count);
	259	if (!path)
	260	return -ENOMEM;
	261
	262	if (bus_find_device(&ibmebus_bus_type, NULL, path,
74c9b99d	263	ibmebus_match_path)) {
0727702a	264	printk(KERN_WARNING "%s: %s has already been probed\n",
e48b1b45	265	__func__, path);
74c9b99d	266	rc = -EEXIST;
0727702a	267	goto out;
6bccf755 JF	268	}
6bccf755 JF	269
0727702a	270	if ((dn = of_find_node_by_path(path))) {
55347cc9	271	rc = ibmebus_create_device(dn);
0727702a	272	of_node_put(dn);
0727702a JF	273	} else {
0727702a JF	274	printk(KERN_WARNING "%s: no such device node: %s\n",
e48b1b45	275	__func__, path);
0727702a	276	rc = -ENODEV;
6bccf755 JF	277	}
6bccf755 JF	278
0727702a JF	279	out:
0727702a JF	280	kfree(path);
55347cc9 JF	281	if (rc)
	282	return rc;
	283	return count;
6bccf755 JF	284	}
	285
	286	static ssize_t ibmebus_store_remove(struct bus_type *bus,
	287	const char *buf, size_t count)
	288	{
	289	struct device *dev;
0727702a	290	char *path;
6bccf755	291
0727702a JF	292	path = ibmebus_chomp(buf, count);
	293	if (!path)
	294	return -ENOMEM;
	295
	296	if ((dev = bus_find_device(&ibmebus_bus_type, NULL, path,
	297	ibmebus_match_path))) {
a454dc50	298	of_device_unregister(to_platform_device(dev));
0727702a JF	299
	300	kfree(path);
	301	return count;
6bccf755	302	} else {
0727702a	303	printk(KERN_WARNING "%s: %s not on the bus\n",
e48b1b45	304	__func__, path);
0727702a JF	305
0727702a JF	306	kfree(path);
6bccf755 JF	307	return -ENODEV;
6bccf755 JF	308	}
6bccf755 JF	309	}
	310
	311	static struct bus_attribute ibmebus_bus_attrs[] = {
	312	__ATTR(probe, S_IWUSR, NULL, ibmebus_store_probe),
	313	__ATTR(remove, S_IWUSR, NULL, ibmebus_store_remove),
	314	__ATTR_NULL
	315	};
	316
d7a30103	317	struct bus_type ibmebus_bus_type = {
55347cc9	318	.uevent = of_device_uevent,
6bccf755	319	.bus_attrs = ibmebus_bus_attrs
d7a30103 HS	320	};
	321	EXPORT_SYMBOL(ibmebus_bus_type);
	322
	323	static int __init ibmebus_bus_init(void)
	324	{
	325	int err;
a8308800	326
d7a30103	327	printk(KERN_INFO "IBM eBus Device Driver\n");
a8308800	328
a988c0a6	329	err = of_bus_type_init(&ibmebus_bus_type, "ibmebus");
d7a30103	330	if (err) {
a988c0a6	331	printk(KERN_ERR "%s: failed to register IBM eBus.\n",
e48b1b45	332	__func__);
d7a30103 HS	333	return err;
d7a30103 HS	334	}
a8308800	335
6bccf755	336	err = device_register(&ibmebus_bus_device);
d7a30103	337	if (err) {
a8308800	338	printk(KERN_WARNING "%s: device_register returned %i\n",
e48b1b45	339	__func__, err);
d7a30103 HS	340	bus_unregister(&ibmebus_bus_type);
	341
	342	return err;
	343	}
a8308800	344
1b17adf1	345	err = ibmebus_create_devices(ibmebus_matches);
55347cc9 JF	346	if (err) {
	347	device_unregister(&ibmebus_bus_device);
	348	bus_unregister(&ibmebus_bus_type);
	349	return err;
	350	}
	351
d7a30103 HS	352	return 0;
d7a30103 HS	353	}
a988c0a6	354	postcore_initcall(ibmebus_bus_init);