[deliverable/linux.git] / arch / powerpc / platforms / ps3 / system-bus.c

/*
 *  PS3 system bus driver.
 *
 *  Copyright (C) 2006 Sony Computer Entertainment Inc.
 *  Copyright 2006 Sony Corp.
 *
 *  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; version 2 of the License.
 *
 *  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/init.h>
#include <linux/module.h>
#include <linux/dma-mapping.h>
#include <linux/err.h>

#include <asm/udbg.h>
#include <asm/lv1call.h>
#include <asm/firmware.h>

#include "platform.h"

#define dump_mmio_region(_a) _dump_mmio_region(_a, __func__, __LINE__)
static void _dump_mmio_region(const struct ps3_mmio_region* r,
	const char* func, int line)
{
	pr_debug("%s:%d: dev       %u:%u\n", func, line, r->did.bus_id,
		r->did.dev_id);
	pr_debug("%s:%d: bus_addr  %lxh\n", func, line, r->bus_addr);
	pr_debug("%s:%d: len       %lxh\n", func, line, r->len);
	pr_debug("%s:%d: lpar_addr %lxh\n", func, line, r->lpar_addr);
}

int ps3_mmio_region_create(struct ps3_mmio_region *r)
{
	int result;

	result = lv1_map_device_mmio_region(r->did.bus_id, r->did.dev_id,
		r->bus_addr, r->len, r->page_size, &r->lpar_addr);

	if (result) {
		pr_debug("%s:%d: lv1_map_device_mmio_region failed: %s\n",
			__func__, __LINE__, ps3_result(result));
		r->lpar_addr = 0;
	}

	dump_mmio_region(r);
	return result;
}
EXPORT_SYMBOL_GPL(ps3_mmio_region_create);

int ps3_free_mmio_region(struct ps3_mmio_region *r)
{
	int result;

	result = lv1_unmap_device_mmio_region(r->did.bus_id, r->did.dev_id,
		r->lpar_addr);

	if (result)
		pr_debug("%s:%d: lv1_unmap_device_mmio_region failed: %s\n",
			__func__, __LINE__, ps3_result(result));

	r->lpar_addr = 0;
	return result;
}
EXPORT_SYMBOL_GPL(ps3_free_mmio_region);

static int ps3_system_bus_match(struct device *_dev,
	struct device_driver *_drv)
{
	int result;
	struct ps3_system_bus_driver *drv = to_ps3_system_bus_driver(_drv);
	struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);

	result = dev->match_id == drv->match_id;

	pr_info("%s:%d: dev=%u(%s), drv=%u(%s): %s\n", __func__, __LINE__,
		dev->match_id, dev->core.bus_id, drv->match_id, drv->core.name,
		(result ? "match" : "miss"));
	return result;
}

static int ps3_system_bus_probe(struct device *_dev)
{
	int result;
	struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
	struct ps3_system_bus_driver *drv =
		to_ps3_system_bus_driver(_dev->driver);

	result = lv1_open_device(dev->did.bus_id, dev->did.dev_id, 0);

	if (result) {
		pr_debug("%s:%d: lv1_open_device failed (%d)\n",
			__func__, __LINE__, result);
		result = -EACCES;
		goto clean_none;
	}

	if (dev->d_region->did.bus_id) {
		result = ps3_dma_region_create(dev->d_region);

		if (result) {
			pr_debug("%s:%d: ps3_dma_region_create failed (%d)\n",
				__func__, __LINE__, result);
			BUG_ON("check region type");
			result = -EINVAL;
			goto clean_device;
		}
	}

	BUG_ON(!drv);

	if (drv->probe)
		result = drv->probe(dev);
	else
		pr_info("%s:%d: %s no probe method\n", __func__, __LINE__,
			dev->core.bus_id);

	if (result) {
		pr_debug("%s:%d: drv->probe failed\n", __func__, __LINE__);
		goto clean_dma;
	}

	return result;

clean_dma:
	ps3_dma_region_free(dev->d_region);
clean_device:
	lv1_close_device(dev->did.bus_id, dev->did.dev_id);
clean_none:
	return result;
}

static int ps3_system_bus_remove(struct device *_dev)
{
	struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
	struct ps3_system_bus_driver *drv =
		to_ps3_system_bus_driver(_dev->driver);

	if (drv->remove)
		drv->remove(dev);
	else
		pr_info("%s:%d: %s no remove method\n", __func__, __LINE__,
			dev->core.bus_id);

	ps3_dma_region_free(dev->d_region);
	ps3_free_mmio_region(dev->m_region);
	lv1_close_device(dev->did.bus_id, dev->did.dev_id);

	return 0;
}

struct bus_type ps3_system_bus_type = {
	.name = "ps3_system_bus",
	.match = ps3_system_bus_match,
	.probe = ps3_system_bus_probe,
	.remove = ps3_system_bus_remove,
};

int __init ps3_system_bus_init(void)
{
	int result;

	if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
		return -ENODEV;

	result = bus_register(&ps3_system_bus_type);
	BUG_ON(result);
	return result;
}

core_initcall(ps3_system_bus_init);

/* Allocates a contiguous real buffer and creates mappings over it.
 * Returns the virtual address of the buffer and sets dma_handle
 * to the dma address (mapping) of the first page.
 */

static void * ps3_alloc_coherent(struct device *_dev, size_t size,
	dma_addr_t *dma_handle, gfp_t flag)
{
	int result;
	struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
	unsigned long virt_addr;

	BUG_ON(!dev->d_region->bus_addr);

	flag &= ~(__GFP_DMA | __GFP_HIGHMEM);
	flag |= __GFP_ZERO;

	virt_addr = __get_free_pages(flag, get_order(size));

	if (!virt_addr) {
		pr_debug("%s:%d: get_free_pages failed\n", __func__, __LINE__);
		goto clean_none;
	}

	result = ps3_dma_map(dev->d_region, virt_addr, size, dma_handle);

	if (result) {
		pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
			__func__, __LINE__, result);
		BUG_ON("check region type");
		goto clean_alloc;
	}

	return (void*)virt_addr;

clean_alloc:
	free_pages(virt_addr, get_order(size));
clean_none:
	dma_handle = NULL;
	return NULL;
}

static void ps3_free_coherent(struct device *_dev, size_t size, void *vaddr,
	dma_addr_t dma_handle)
{
	struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);

	ps3_dma_unmap(dev->d_region, dma_handle, size);
	free_pages((unsigned long)vaddr, get_order(size));
}

/* Creates TCEs for a user provided buffer.  The user buffer must be
 * contiguous real kernel storage (not vmalloc).  The address of the buffer
 * passed here is the kernel (virtual) address of the buffer.  The buffer
 * need not be page aligned, the dma_addr_t returned will point to the same
 * byte within the page as vaddr.
 */

static dma_addr_t ps3_map_single(struct device *_dev, void *ptr, size_t size,
	enum dma_data_direction direction)
{
	struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
	int result;
	unsigned long bus_addr;

	result = ps3_dma_map(dev->d_region, (unsigned long)ptr, size,
		&bus_addr);

	if (result) {
		pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
			__func__, __LINE__, result);
	}

	return bus_addr;
}

static void ps3_unmap_single(struct device *_dev, dma_addr_t dma_addr,
	size_t size, enum dma_data_direction direction)
{
	struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
	int result;

	result = ps3_dma_unmap(dev->d_region, dma_addr, size);

	if (result) {
		pr_debug("%s:%d: ps3_dma_unmap failed (%d)\n",
			__func__, __LINE__, result);
	}
}

static int ps3_map_sg(struct device *_dev, struct scatterlist *sg, int nents,
	enum dma_data_direction direction)
{
#if defined(CONFIG_PS3_DYNAMIC_DMA)
	BUG_ON("do");
	return -EPERM;
#else
	struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
	int i;

	for (i = 0; i < nents; i++, sg++) {
		int result = ps3_dma_map(dev->d_region,
			page_to_phys(sg->page) + sg->offset, sg->length,
			&sg->dma_address);

		if (result) {
			pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
				__func__, __LINE__, result);
			return -EINVAL;
		}

		sg->dma_length = sg->length;
	}

	return nents;
#endif
}

static void ps3_unmap_sg(struct device *_dev, struct scatterlist *sg,
	int nents, enum dma_data_direction direction)
{
#if defined(CONFIG_PS3_DYNAMIC_DMA)
	BUG_ON("do");
#endif
}

static int ps3_dma_supported(struct device *_dev, u64 mask)
{
	return mask >= DMA_32BIT_MASK;
}

static struct dma_mapping_ops ps3_dma_ops = {
	.alloc_coherent = ps3_alloc_coherent,
	.free_coherent = ps3_free_coherent,
	.map_single = ps3_map_single,
	.unmap_single = ps3_unmap_single,
	.map_sg = ps3_map_sg,
	.unmap_sg = ps3_unmap_sg,
	.dma_supported = ps3_dma_supported
};

/**
 * ps3_system_bus_release_device - remove a device from the system bus
 */

static void ps3_system_bus_release_device(struct device *_dev)
{
	struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
	kfree(dev);
}

/**
 * ps3_system_bus_device_register - add a device to the system bus
 *
 * ps3_system_bus_device_register() expects the dev object to be allocated
 * dynamically by the caller.  The system bus takes ownership of the dev
 * object and frees the object in ps3_system_bus_release_device().
 */

int ps3_system_bus_device_register(struct ps3_system_bus_device *dev)
{
	int result;
	static unsigned int dev_count = 1;

	dev->core.parent = NULL;
	dev->core.bus = &ps3_system_bus_type;
	dev->core.release = ps3_system_bus_release_device;

	dev->core.archdata.of_node = NULL;
	dev->core.archdata.dma_ops = &ps3_dma_ops;
	dev->core.archdata.numa_node = 0;

	snprintf(dev->core.bus_id, sizeof(dev->core.bus_id), "sb_%02x",
		dev_count++);

	pr_debug("%s:%d add %s\n", __func__, __LINE__, dev->core.bus_id);

	result = device_register(&dev->core);
	return result;
}

EXPORT_SYMBOL_GPL(ps3_system_bus_device_register);

int ps3_system_bus_driver_register(struct ps3_system_bus_driver *drv)
{
	int result;

	drv->core.bus = &ps3_system_bus_type;

	result = driver_register(&drv->core);
	return result;
}

EXPORT_SYMBOL_GPL(ps3_system_bus_driver_register);

void ps3_system_bus_driver_unregister(struct ps3_system_bus_driver *drv)
{
	driver_unregister(&drv->core);
}

EXPORT_SYMBOL_GPL(ps3_system_bus_driver_unregister);
Commit	Line	Data
a3d4d643 GL	1	/*
	2	* PS3 system bus driver.
	3	*
	4	* Copyright (C) 2006 Sony Computer Entertainment Inc.
	5	* Copyright 2006 Sony Corp.
	6	*
	7	* This program is free software; you can redistribute it and/or modify
	8	* it under the terms of the GNU General Public License as published by
	9	* the Free Software Foundation; version 2 of the License.
	10	*
	11	* This program is distributed in the hope that it will be useful,
	12	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	* GNU General Public License for more details.
	15	*
	16	* You should have received a copy of the GNU General Public License
	17	* along with this program; if not, write to the Free Software
	18	* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
	19	*/
	20
	21	#include <linux/kernel.h>
	22	#include <linux/init.h>
	23	#include <linux/module.h>
	24	#include <linux/dma-mapping.h>
	25	#include <linux/err.h>
	26
	27	#include <asm/udbg.h>
a3d4d643	28	#include <asm/lv1call.h>
e22ba7e3	29	#include <asm/firmware.h>
a3d4d643	30
2a08ea69 GL	31	#include "platform.h"
2a08ea69 GL	32
a3d4d643 GL	33	#define dump_mmio_region(_a) _dump_mmio_region(_a, __func__, __LINE__)
	34	static void _dump_mmio_region(const struct ps3_mmio_region* r,
	35	const char* func, int line)
	36	{
	37	pr_debug("%s:%d: dev %u:%u\n", func, line, r->did.bus_id,
	38	r->did.dev_id);
	39	pr_debug("%s:%d: bus_addr %lxh\n", func, line, r->bus_addr);
	40	pr_debug("%s:%d: len %lxh\n", func, line, r->len);
	41	pr_debug("%s:%d: lpar_addr %lxh\n", func, line, r->lpar_addr);
	42	}
	43
	44	int ps3_mmio_region_create(struct ps3_mmio_region *r)
	45	{
	46	int result;
	47
	48	result = lv1_map_device_mmio_region(r->did.bus_id, r->did.dev_id,
	49	r->bus_addr, r->len, r->page_size, &r->lpar_addr);
	50
	51	if (result) {
	52	pr_debug("%s:%d: lv1_map_device_mmio_region failed: %s\n",
	53	__func__, __LINE__, ps3_result(result));
43d80439	54	r->lpar_addr = 0;
a3d4d643 GL	55	}
	56
	57	dump_mmio_region(r);
	58	return result;
	59	}
9288f5c3	60	EXPORT_SYMBOL_GPL(ps3_mmio_region_create);
a3d4d643 GL	61
	62	int ps3_free_mmio_region(struct ps3_mmio_region *r)
	63	{
	64	int result;
	65
	66	result = lv1_unmap_device_mmio_region(r->did.bus_id, r->did.dev_id,
43d80439	67	r->lpar_addr);
a3d4d643 GL	68
	69	if (result)
	70	pr_debug("%s:%d: lv1_unmap_device_mmio_region failed: %s\n",
	71	__func__, __LINE__, ps3_result(result));
	72
43d80439	73	r->lpar_addr = 0;
a3d4d643 GL	74	return result;
a3d4d643 GL	75	}
9288f5c3	76	EXPORT_SYMBOL_GPL(ps3_free_mmio_region);
a3d4d643 GL	77
	78	static int ps3_system_bus_match(struct device *_dev,
	79	struct device_driver *_drv)
	80	{
	81	int result;
	82	struct ps3_system_bus_driver *drv = to_ps3_system_bus_driver(_drv);
	83	struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
	84
	85	result = dev->match_id == drv->match_id;
	86
	87	pr_info("%s:%d: dev=%u(%s), drv=%u(%s): %s\n", __func__, __LINE__,
	88	dev->match_id, dev->core.bus_id, drv->match_id, drv->core.name,
	89	(result ? "match" : "miss"));
	90	return result;
	91	}
	92
	93	static int ps3_system_bus_probe(struct device *_dev)
	94	{
	95	int result;
	96	struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
	97	struct ps3_system_bus_driver *drv =
	98	to_ps3_system_bus_driver(_dev->driver);
	99
	100	result = lv1_open_device(dev->did.bus_id, dev->did.dev_id, 0);
	101
	102	if (result) {
	103	pr_debug("%s:%d: lv1_open_device failed (%d)\n",
	104	__func__, __LINE__, result);
	105	result = -EACCES;
	106	goto clean_none;
	107	}
	108
	109	if (dev->d_region->did.bus_id) {
	110	result = ps3_dma_region_create(dev->d_region);
	111
	112	if (result) {
	113	pr_debug("%s:%d: ps3_dma_region_create failed (%d)\n",
	114	__func__, __LINE__, result);
	115	BUG_ON("check region type");
	116	result = -EINVAL;
	117	goto clean_device;
	118	}
	119	}
	120
	121	BUG_ON(!drv);
	122
	123	if (drv->probe)
	124	result = drv->probe(dev);
	125	else
	126	pr_info("%s:%d: %s no probe method\n", __func__, __LINE__,
	127	dev->core.bus_id);
	128
	129	if (result) {
	130	pr_debug("%s:%d: drv->probe failed\n", __func__, __LINE__);
	131	goto clean_dma;
	132	}
	133
	134	return result;
	135
	136	clean_dma:
	137	ps3_dma_region_free(dev->d_region);
	138	clean_device:
	139	lv1_close_device(dev->did.bus_id, dev->did.dev_id);
	140	clean_none:
141	return result;
142	}
143
144	static int ps3_system_bus_remove(struct device *_dev)
145	{
146	struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
147	struct ps3_system_bus_driver *drv =
148	to_ps3_system_bus_driver(_dev->driver);
149
150	if (drv->remove)
151	drv->remove(dev);
152	else
153	pr_info("%s:%d: %s no remove method\n", __func__, __LINE__,
154	dev->core.bus_id);
155
156	ps3_dma_region_free(dev->d_region);
157	ps3_free_mmio_region(dev->m_region);
158	lv1_close_device(dev->did.bus_id, dev->did.dev_id);
159
160	return 0;
161	}
162
163	struct bus_type ps3_system_bus_type = {
2a08ea69	164	.name = "ps3_system_bus",
a3d4d643 GL	165	.match = ps3_system_bus_match,
	166	.probe = ps3_system_bus_probe,
	167	.remove = ps3_system_bus_remove,
	168	};
	169
	170	int __init ps3_system_bus_init(void)
	171	{
	172	int result;
	173
e22ba7e3	174	if (!firmware_has_feature(FW_FEATURE_PS3_LV1))
ef596c69	175	return -ENODEV;
e22ba7e3	176
a3d4d643 GL	177	result = bus_register(&ps3_system_bus_type);
	178	BUG_ON(result);
	179	return result;
	180	}
	181
	182	core_initcall(ps3_system_bus_init);
	183
	184	/* Allocates a contiguous real buffer and creates mappings over it.
	185	* Returns the virtual address of the buffer and sets dma_handle
	186	* to the dma address (mapping) of the first page.
	187	*/
	188
	189	static void * ps3_alloc_coherent(struct device *_dev, size_t size,
	190	dma_addr_t *dma_handle, gfp_t flag)
	191	{
	192	int result;
	193	struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
	194	unsigned long virt_addr;
	195
	196	BUG_ON(!dev->d_region->bus_addr);
	197
	198	flag &= ~(__GFP_DMA \| __GFP_HIGHMEM);
	199	flag \|= __GFP_ZERO;
	200
	201	virt_addr = __get_free_pages(flag, get_order(size));
	202
	203	if (!virt_addr) {
	204	pr_debug("%s:%d: get_free_pages failed\n", __func__, __LINE__);
	205	goto clean_none;
	206	}
	207
	208	result = ps3_dma_map(dev->d_region, virt_addr, size, dma_handle);
	209
	210	if (result) {
	211	pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
	212	__func__, __LINE__, result);
	213	BUG_ON("check region type");
	214	goto clean_alloc;
	215	}
	216
	217	return (void*)virt_addr;
	218
	219	clean_alloc:
	220	free_pages(virt_addr, get_order(size));
	221	clean_none:
	222	dma_handle = NULL;
	223	return NULL;
	224	}
	225
	226	static void ps3_free_coherent(struct device _dev, size_t size, void vaddr,
	227	dma_addr_t dma_handle)
	228	{
	229	struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
	230
	231	ps3_dma_unmap(dev->d_region, dma_handle, size);
	232	free_pages((unsigned long)vaddr, get_order(size));
	233	}
	234
	235	/* Creates TCEs for a user provided buffer. The user buffer must be
	236	* contiguous real kernel storage (not vmalloc). The address of the buffer
	237	* passed here is the kernel (virtual) address of the buffer. The buffer
	238	* need not be page aligned, the dma_addr_t returned will point to the same
	239	* byte within the page as vaddr.
	240	*/
241
242	static dma_addr_t ps3_map_single(struct device _dev, void ptr, size_t size,
243	enum dma_data_direction direction)
244	{
245	struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
246	int result;
247	unsigned long bus_addr;
248
249	result = ps3_dma_map(dev->d_region, (unsigned long)ptr, size,
250	&bus_addr);
251
252	if (result) {
253	pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
254	__func__, __LINE__, result);
255	}
256
257	return bus_addr;
258	}
259
260	static void ps3_unmap_single(struct device *_dev, dma_addr_t dma_addr,
261	size_t size, enum dma_data_direction direction)
262	{
263	struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
264	int result;
265
266	result = ps3_dma_unmap(dev->d_region, dma_addr, size);
267
268	if (result) {
269	pr_debug("%s:%d: ps3_dma_unmap failed (%d)\n",
270	__func__, __LINE__, result);
271	}
272	}
273
274	static int ps3_map_sg(struct device _dev, struct scatterlist sg, int nents,
275	enum dma_data_direction direction)
276	{
277	#if defined(CONFIG_PS3_DYNAMIC_DMA)
278	BUG_ON("do");
35063bb2 GL	279	return -EPERM;
35063bb2 GL	280	#else
435e0b2b SR	281	struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
	282	int i;
	283
35063bb2 GL	284	for (i = 0; i < nents; i++, sg++) {
	285	int result = ps3_dma_map(dev->d_region,
	286	page_to_phys(sg->page) + sg->offset, sg->length,
	287	&sg->dma_address);
	288
	289	if (result) {
	290	pr_debug("%s:%d: ps3_dma_map failed (%d)\n",
	291	__func__, __LINE__, result);
	292	return -EINVAL;
	293	}
	294
	295	sg->dma_length = sg->length;
	296	}
	297
	298	return nents;
a3d4d643	299	#endif
a3d4d643 GL	300	}
	301
	302	static void ps3_unmap_sg(struct device _dev, struct scatterlist sg,
	303	int nents, enum dma_data_direction direction)
	304	{
	305	#if defined(CONFIG_PS3_DYNAMIC_DMA)
	306	BUG_ON("do");
	307	#endif
	308	}
	309
	310	static int ps3_dma_supported(struct device *_dev, u64 mask)
	311	{
35063bb2	312	return mask >= DMA_32BIT_MASK;
a3d4d643 GL	313	}
	314
	315	static struct dma_mapping_ops ps3_dma_ops = {
	316	.alloc_coherent = ps3_alloc_coherent,
	317	.free_coherent = ps3_free_coherent,
	318	.map_single = ps3_map_single,
	319	.unmap_single = ps3_unmap_single,
	320	.map_sg = ps3_map_sg,
	321	.unmap_sg = ps3_unmap_sg,
	322	.dma_supported = ps3_dma_supported
	323	};
	324
	325	/**
	326	* ps3_system_bus_release_device - remove a device from the system bus
	327	*/
	328
	329	static void ps3_system_bus_release_device(struct device *_dev)
	330	{
	331	struct ps3_system_bus_device *dev = to_ps3_system_bus_device(_dev);
	332	kfree(dev);
	333	}
	334
	335	/**
	336	* ps3_system_bus_device_register - add a device to the system bus
	337	*
	338	* ps3_system_bus_device_register() expects the dev object to be allocated
	339	* dynamically by the caller. The system bus takes ownership of the dev
	340	* object and frees the object in ps3_system_bus_release_device().
	341	*/
	342
	343	int ps3_system_bus_device_register(struct ps3_system_bus_device *dev)
	344	{
	345	int result;
	346	static unsigned int dev_count = 1;
	347
	348	dev->core.parent = NULL;
	349	dev->core.bus = &ps3_system_bus_type;
	350	dev->core.release = ps3_system_bus_release_device;
	351
	352	dev->core.archdata.of_node = NULL;
	353	dev->core.archdata.dma_ops = &ps3_dma_ops;
	354	dev->core.archdata.numa_node = 0;
	355
	356	snprintf(dev->core.bus_id, sizeof(dev->core.bus_id), "sb_%02x",
	357	dev_count++);
	358
	359	pr_debug("%s:%d add %s\n", __func__, __LINE__, dev->core.bus_id);
	360
	361	result = device_register(&dev->core);
	362	return result;
	363	}
	364
	365	EXPORT_SYMBOL_GPL(ps3_system_bus_device_register);
	366
	367	int ps3_system_bus_driver_register(struct ps3_system_bus_driver *drv)
	368	{
	369	int result;
	370
	371	drv->core.bus = &ps3_system_bus_type;
	372
	373	result = driver_register(&drv->core);
	374	return result;
	375	}
	376
377	EXPORT_SYMBOL_GPL(ps3_system_bus_driver_register);
378
379	void ps3_system_bus_driver_unregister(struct ps3_system_bus_driver *drv)
380	{
381	driver_unregister(&drv->core);
382	}
383
384	EXPORT_SYMBOL_GPL(ps3_system_bus_driver_unregister);