[GitHub/mt8127/android_kernel_alcatel_ttab.git] / arch / powerpc / sysdev / axonram.c

/*
 * (C) Copyright IBM Deutschland Entwicklung GmbH 2006
 *
 * Author: Maxim Shchetynin <maxim@de.ibm.com>
 *
 * Axon DDR2 device driver.
 * It registers one block device per Axon's DDR2 memory bank found on a system.
 * Block devices are called axonram?, their major and minor numbers are
 * available in /proc/devices, /proc/partitions or in /sys/block/axonram?/dev.
 *
 * 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, 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., 675 Mass Ave, Cambridge, MA 02139, USA.
 */

#include <linux/bio.h>
#include <linux/blkdev.h>
#include <linux/buffer_head.h>
#include <linux/device.h>
#include <linux/errno.h>
#include <linux/fs.h>
#include <linux/genhd.h>
#include <linux/interrupt.h>
#include <linux/io.h>
#include <linux/ioport.h>
#include <linux/irq.h>
#include <linux/irqreturn.h>
#include <linux/kernel.h>
#include <linux/mm.h>
#include <linux/mod_devicetable.h>
#include <linux/module.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/types.h>
#include <linux/of_device.h>
#include <linux/of_platform.h>

#include <asm/page.h>
#include <asm/prom.h>

#define AXON_RAM_MODULE_NAME		"axonram"
#define AXON_RAM_DEVICE_NAME		"axonram"
#define AXON_RAM_MINORS_PER_DISK	16
#define AXON_RAM_BLOCK_SHIFT		PAGE_SHIFT
#define AXON_RAM_BLOCK_SIZE		1 << AXON_RAM_BLOCK_SHIFT
#define AXON_RAM_SECTOR_SHIFT		9
#define AXON_RAM_SECTOR_SIZE		1 << AXON_RAM_SECTOR_SHIFT
#define AXON_RAM_IRQ_FLAGS		IRQF_SHARED | IRQF_TRIGGER_RISING

struct axon_ram_bank {
	struct of_device	*device;
	struct gendisk		*disk;
	unsigned int		irq_id;
	unsigned long		ph_addr;
	unsigned long		io_addr;
	unsigned long		size;
	unsigned long		ecc_counter;
};

static ssize_t
axon_ram_sysfs_ecc(struct device *dev, struct device_attribute *attr, char *buf)
{
	struct of_device *device = to_of_device(dev);
	struct axon_ram_bank *bank = device->dev.platform_data;

	BUG_ON(!bank);

	return sprintf(buf, "%ld\n", bank->ecc_counter);
}

static DEVICE_ATTR(ecc, S_IRUGO, axon_ram_sysfs_ecc, NULL);

/**
 * axon_ram_irq_handler - interrupt handler for Axon RAM ECC
 * @irq: interrupt ID
 * @dev: pointer to of_device
 */
static irqreturn_t
axon_ram_irq_handler(int irq, void *dev)
{
	struct of_device *device = dev;
	struct axon_ram_bank *bank = device->dev.platform_data;

	BUG_ON(!bank);

	dev_err(&device->dev, "Correctable memory error occured\n");
	bank->ecc_counter++;
	return IRQ_HANDLED;
}

/**
 * axon_ram_make_request - make_request() method for block device
 * @queue, @bio: see blk_queue_make_request()
 */
static int
axon_ram_make_request(struct request_queue *queue, struct bio *bio)
{
	struct axon_ram_bank *bank = bio->bi_bdev->bd_disk->private_data;
	unsigned long phys_mem, phys_end;
	void *user_mem;
	struct bio_vec *vec;
	unsigned int transfered;
	unsigned short idx;
	int rc = 0;

	phys_mem = bank->io_addr + (bio->bi_sector << AXON_RAM_SECTOR_SHIFT);
	phys_end = bank->io_addr + bank->size;
	transfered = 0;
	bio_for_each_segment(vec, bio, idx) {
		if (unlikely(phys_mem + vec->bv_len > phys_end)) {
			bio_io_error(bio);
			rc = -ERANGE;
			break;
		}

		user_mem = page_address(vec->bv_page) + vec->bv_offset;
		if (bio_data_dir(bio) == READ)
			memcpy(user_mem, (void *) phys_mem, vec->bv_len);
		else
			memcpy((void *) phys_mem, user_mem, vec->bv_len);

		phys_mem += vec->bv_len;
		transfered += vec->bv_len;
	}
	bio_endio(bio, 0);

	return rc;
}

/**
 * axon_ram_direct_access - direct_access() method for block device
 * @device, @sector, @data: see block_device_operations method
 */
static int
axon_ram_direct_access(struct block_device *device, sector_t sector,
		       void **kaddr, unsigned long *pfn)
{
	struct axon_ram_bank *bank = device->bd_disk->private_data;
	loff_t offset;

	offset = sector << AXON_RAM_SECTOR_SHIFT;
	if (offset >= bank->size) {
		dev_err(&bank->device->dev, "Access outside of address space\n");
		return -ERANGE;
	}

	*kaddr = (void *)(bank->ph_addr + offset);
	*pfn = virt_to_phys(kaddr) >> PAGE_SHIFT;

	return 0;
}

static struct block_device_operations axon_ram_devops = {
	.owner		= THIS_MODULE,
	.direct_access	= axon_ram_direct_access
};

/**
 * axon_ram_probe - probe() method for platform driver
 * @device, @device_id: see of_platform_driver method
 */
static int
axon_ram_probe(struct of_device *device, const struct of_device_id *device_id)
{
	static int axon_ram_bank_id = -1;
	struct axon_ram_bank *bank;
	struct resource resource;
	int rc = 0;

	axon_ram_bank_id++;

	dev_info(&device->dev, "Found memory controller on %s\n",
			device->node->full_name);

	bank = kzalloc(sizeof(struct axon_ram_bank), GFP_KERNEL);
	if (bank == NULL) {
		dev_err(&device->dev, "Out of memory\n");
		rc = -ENOMEM;
		goto failed;
	}

	device->dev.platform_data = bank;

	bank->device = device;

	if (of_address_to_resource(device->node, 0, &resource) != 0) {
		dev_err(&device->dev, "Cannot access device tree\n");
		rc = -EFAULT;
		goto failed;
	}

	bank->size = resource.end - resource.start + 1;

	if (bank->size == 0) {
		dev_err(&device->dev, "No DDR2 memory found for %s%d\n",
				AXON_RAM_DEVICE_NAME, axon_ram_bank_id);
		rc = -ENODEV;
		goto failed;
	}

	dev_info(&device->dev, "Register DDR2 memory device %s%d with %luMB\n",
			AXON_RAM_DEVICE_NAME, axon_ram_bank_id, bank->size >> 20);

	bank->ph_addr = resource.start;
	bank->io_addr = (unsigned long) ioremap_flags(
			bank->ph_addr, bank->size, _PAGE_NO_CACHE);
	if (bank->io_addr == 0) {
		dev_err(&device->dev, "ioremap() failed\n");
		rc = -EFAULT;
		goto failed;
	}

	bank->disk = alloc_disk(AXON_RAM_MINORS_PER_DISK);
	if (bank->disk == NULL) {
		dev_err(&device->dev, "Cannot register disk\n");
		rc = -EFAULT;
		goto failed;
	}

	bank->disk->first_minor = 0;
	bank->disk->fops = &axon_ram_devops;
	bank->disk->private_data = bank;
	bank->disk->driverfs_dev = &device->dev;

	sprintf(bank->disk->disk_name, "%s%d",
			AXON_RAM_DEVICE_NAME, axon_ram_bank_id);
	bank->disk->major = register_blkdev(0, bank->disk->disk_name);
	if (bank->disk->major < 0) {
		dev_err(&device->dev, "Cannot register block device\n");
		rc = -EFAULT;
		goto failed;
	}

	bank->disk->queue = blk_alloc_queue(GFP_KERNEL);
	if (bank->disk->queue == NULL) {
		dev_err(&device->dev, "Cannot register disk queue\n");
		rc = -EFAULT;
		goto failed;
	}

	set_capacity(bank->disk, bank->size >> AXON_RAM_SECTOR_SHIFT);
	blk_queue_make_request(bank->disk->queue, axon_ram_make_request);
	blk_queue_hardsect_size(bank->disk->queue, AXON_RAM_SECTOR_SIZE);
	add_disk(bank->disk);

	bank->irq_id = irq_of_parse_and_map(device->node, 0);
	if (bank->irq_id == NO_IRQ) {
		dev_err(&device->dev, "Cannot access ECC interrupt ID\n");
		rc = -EFAULT;
		goto failed;
	}

	rc = request_irq(bank->irq_id, axon_ram_irq_handler,
			AXON_RAM_IRQ_FLAGS, bank->disk->disk_name, device);
	if (rc != 0) {
		dev_err(&device->dev, "Cannot register ECC interrupt handler\n");
		bank->irq_id = NO_IRQ;
		rc = -EFAULT;
		goto failed;
	}

	rc = device_create_file(&device->dev, &dev_attr_ecc);
	if (rc != 0) {
		dev_err(&device->dev, "Cannot create sysfs file\n");
		rc = -EFAULT;
		goto failed;
	}

	return 0;

failed:
	if (bank != NULL) {
		if (bank->irq_id != NO_IRQ)
			free_irq(bank->irq_id, device);
		if (bank->disk != NULL) {
			if (bank->disk->major > 0)
				unregister_blkdev(bank->disk->major,
						bank->disk->disk_name);
			del_gendisk(bank->disk);
		}
		device->dev.platform_data = NULL;
		if (bank->io_addr != 0)
			iounmap((void __iomem *) bank->io_addr);
		kfree(bank);
	}

	return rc;
}

/**
 * axon_ram_remove - remove() method for platform driver
 * @device: see of_platform_driver method
 */
static int
axon_ram_remove(struct of_device *device)
{
	struct axon_ram_bank *bank = device->dev.platform_data;

	BUG_ON(!bank || !bank->disk);

	device_remove_file(&device->dev, &dev_attr_ecc);
	free_irq(bank->irq_id, device);
	unregister_blkdev(bank->disk->major, bank->disk->disk_name);
	del_gendisk(bank->disk);
	iounmap((void __iomem *) bank->io_addr);
	kfree(bank);

	return 0;
}

static struct of_device_id axon_ram_device_id[] = {
	{
		.type	= "dma-memory"
	},
	{}
};

static struct of_platform_driver axon_ram_driver = {
	.match_table	= axon_ram_device_id,
	.probe		= axon_ram_probe,
	.remove		= axon_ram_remove,
	.driver		= {
		.owner	= THIS_MODULE,
		.name	= AXON_RAM_MODULE_NAME,
	},
};

/**
 * axon_ram_init
 */
static int __init
axon_ram_init(void)
{
	return of_register_platform_driver(&axon_ram_driver);
}

/**
 * axon_ram_exit
 */
static void __exit
axon_ram_exit(void)
{
	of_unregister_platform_driver(&axon_ram_driver);
}

module_init(axon_ram_init);
module_exit(axon_ram_exit);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Maxim Shchetynin <maxim@de.ibm.com>");
MODULE_DESCRIPTION("Axon DDR2 RAM device driver for IBM Cell BE");
Commit	Line	Data
dbdf04c4 MS	1	/*
	2	* (C) Copyright IBM Deutschland Entwicklung GmbH 2006
	3	*
	4	* Author: Maxim Shchetynin <maxim@de.ibm.com>
	5	*
	6	* Axon DDR2 device driver.
	7	* It registers one block device per Axon's DDR2 memory bank found on a system.
	8	* Block devices are called axonram?, their major and minor numbers are
	9	* available in /proc/devices, /proc/partitions or in /sys/block/axonram?/dev.
	10	*
	11	* This program is free software; you can redistribute it and/or modify
	12	* it under the terms of the GNU General Public License as published by
	13	* the Free Software Foundation; either version 2, or (at your option)
	14	* any later version.
	15	*
	16	* This program is distributed in the hope that it will be useful,
	17	* but WITHOUT ANY WARRANTY; without even the implied warranty of
	18	* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	19	* GNU General Public License for more details.
	20	*
	21	* You should have received a copy of the GNU General Public License
	22	* along with this program; if not, write to the Free Software
	23	* Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
	24	*/
	25
	26	#include <linux/bio.h>
	27	#include <linux/blkdev.h>
	28	#include <linux/buffer_head.h>
	29	#include <linux/device.h>
	30	#include <linux/errno.h>
	31	#include <linux/fs.h>
	32	#include <linux/genhd.h>
	33	#include <linux/interrupt.h>
	34	#include <linux/io.h>
	35	#include <linux/ioport.h>
	36	#include <linux/irq.h>
	37	#include <linux/irqreturn.h>
	38	#include <linux/kernel.h>
	39	#include <linux/mm.h>
	40	#include <linux/mod_devicetable.h>
	41	#include <linux/module.h>
	42	#include <linux/slab.h>
	43	#include <linux/string.h>
	44	#include <linux/types.h>
eb8f2763 JL	45	#include <linux/of_device.h>
	46	#include <linux/of_platform.h>
	47
dbdf04c4 MS	48	#include <asm/page.h>
	49	#include <asm/prom.h>
	50
	51	#define AXON_RAM_MODULE_NAME "axonram"
	52	#define AXON_RAM_DEVICE_NAME "axonram"
	53	#define AXON_RAM_MINORS_PER_DISK 16
	54	#define AXON_RAM_BLOCK_SHIFT PAGE_SHIFT
	55	#define AXON_RAM_BLOCK_SIZE 1 << AXON_RAM_BLOCK_SHIFT
	56	#define AXON_RAM_SECTOR_SHIFT 9
	57	#define AXON_RAM_SECTOR_SIZE 1 << AXON_RAM_SECTOR_SHIFT
	58	#define AXON_RAM_IRQ_FLAGS IRQF_SHARED \| IRQF_TRIGGER_RISING
	59
	60	struct axon_ram_bank {
	61	struct of_device *device;
	62	struct gendisk *disk;
fedcd2c5	63	unsigned int irq_id;
dbdf04c4 MS	64	unsigned long ph_addr;
	65	unsigned long io_addr;
	66	unsigned long size;
	67	unsigned long ecc_counter;
	68	};
	69
	70	static ssize_t
	71	axon_ram_sysfs_ecc(struct device dev, struct device_attribute attr, char *buf)
	72	{
	73	struct of_device *device = to_of_device(dev);
	74	struct axon_ram_bank *bank = device->dev.platform_data;
	75
	76	BUG_ON(!bank);
	77
	78	return sprintf(buf, "%ld\n", bank->ecc_counter);
	79	}
	80
	81	static DEVICE_ATTR(ecc, S_IRUGO, axon_ram_sysfs_ecc, NULL);
	82
	83	/**
	84	* axon_ram_irq_handler - interrupt handler for Axon RAM ECC
	85	* @irq: interrupt ID
	86	* @dev: pointer to of_device
	87	*/
	88	static irqreturn_t
	89	axon_ram_irq_handler(int irq, void *dev)
	90	{
	91	struct of_device *device = dev;
	92	struct axon_ram_bank *bank = device->dev.platform_data;
	93
	94	BUG_ON(!bank);
	95
fedcd2c5 MS	96	dev_err(&device->dev, "Correctable memory error occured\n");
	97	bank->ecc_counter++;
	98	return IRQ_HANDLED;
dbdf04c4 MS	99	}
	100
	101	/**
	102	* axon_ram_make_request - make_request() method for block device
	103	* @queue, @bio: see blk_queue_make_request()
	104	*/
	105	static int
	106	axon_ram_make_request(struct request_queue queue, struct bio bio)
	107	{
	108	struct axon_ram_bank *bank = bio->bi_bdev->bd_disk->private_data;
	109	unsigned long phys_mem, phys_end;
	110	void *user_mem;
	111	struct bio_vec *vec;
	112	unsigned int transfered;
	113	unsigned short idx;
	114	int rc = 0;
	115
	116	phys_mem = bank->io_addr + (bio->bi_sector << AXON_RAM_SECTOR_SHIFT);
	117	phys_end = bank->io_addr + bank->size;
	118	transfered = 0;
	119	bio_for_each_segment(vec, bio, idx) {
	120	if (unlikely(phys_mem + vec->bv_len > phys_end)) {
d81fec0f	121	bio_io_error(bio);
dbdf04c4 MS	122	rc = -ERANGE;
	123	break;
	124	}
	125
	126	user_mem = page_address(vec->bv_page) + vec->bv_offset;
	127	if (bio_data_dir(bio) == READ)
	128	memcpy(user_mem, (void *) phys_mem, vec->bv_len);
	129	else
	130	memcpy((void *) phys_mem, user_mem, vec->bv_len);
	131
	132	phys_mem += vec->bv_len;
	133	transfered += vec->bv_len;
	134	}
d81fec0f	135	bio_endio(bio, 0);
dbdf04c4 MS	136
	137	return rc;
	138	}
	139
	140	/**
	141	* axon_ram_direct_access - direct_access() method for block device
	142	* @device, @sector, @data: see block_device_operations method
	143	*/
	144	static int
	145	axon_ram_direct_access(struct block_device *device, sector_t sector,
30afcb4b	146	void *kaddr, unsigned long pfn)
dbdf04c4 MS	147	{
	148	struct axon_ram_bank *bank = device->bd_disk->private_data;
	149	loff_t offset;
	150
	151	offset = sector << AXON_RAM_SECTOR_SHIFT;
	152	if (offset >= bank->size) {
	153	dev_err(&bank->device->dev, "Access outside of address space\n");
	154	return -ERANGE;
	155	}
	156
30afcb4b JH	157	kaddr = (void )(bank->ph_addr + offset);
30afcb4b JH	158	*pfn = virt_to_phys(kaddr) >> PAGE_SHIFT;
dbdf04c4 MS	159
	160	return 0;
	161	}
	162
	163	static struct block_device_operations axon_ram_devops = {
	164	.owner = THIS_MODULE,
	165	.direct_access = axon_ram_direct_access
	166	};
	167
	168	/**
	169	* axon_ram_probe - probe() method for platform driver
	170	* @device, @device_id: see of_platform_driver method
	171	*/
	172	static int
	173	axon_ram_probe(struct of_device device, const struct of_device_id device_id)
	174	{
	175	static int axon_ram_bank_id = -1;
	176	struct axon_ram_bank *bank;
	177	struct resource resource;
	178	int rc = 0;
	179
	180	axon_ram_bank_id++;
	181
	182	dev_info(&device->dev, "Found memory controller on %s\n",
	183	device->node->full_name);
	184
	185	bank = kzalloc(sizeof(struct axon_ram_bank), GFP_KERNEL);
	186	if (bank == NULL) {
	187	dev_err(&device->dev, "Out of memory\n");
	188	rc = -ENOMEM;
	189	goto failed;
	190	}
	191
	192	device->dev.platform_data = bank;
	193
	194	bank->device = device;
	195
	196	if (of_address_to_resource(device->node, 0, &resource) != 0) {
	197	dev_err(&device->dev, "Cannot access device tree\n");
	198	rc = -EFAULT;
	199	goto failed;
	200	}
	201
	202	bank->size = resource.end - resource.start + 1;
	203
	204	if (bank->size == 0) {
	205	dev_err(&device->dev, "No DDR2 memory found for %s%d\n",
	206	AXON_RAM_DEVICE_NAME, axon_ram_bank_id);
	207	rc = -ENODEV;
	208	goto failed;
	209	}
	210
	211	dev_info(&device->dev, "Register DDR2 memory device %s%d with %luMB\n",
	212	AXON_RAM_DEVICE_NAME, axon_ram_bank_id, bank->size >> 20);
	213
	214	bank->ph_addr = resource.start;
	215	bank->io_addr = (unsigned long) ioremap_flags(
	216	bank->ph_addr, bank->size, _PAGE_NO_CACHE);
	217	if (bank->io_addr == 0) {
	218	dev_err(&device->dev, "ioremap() failed\n");
	219	rc = -EFAULT;
	220	goto failed;
	221	}
	222
223	bank->disk = alloc_disk(AXON_RAM_MINORS_PER_DISK);
224	if (bank->disk == NULL) {
225	dev_err(&device->dev, "Cannot register disk\n");
226	rc = -EFAULT;
227	goto failed;
228	}
229
230	bank->disk->first_minor = 0;
231	bank->disk->fops = &axon_ram_devops;
232	bank->disk->private_data = bank;
233	bank->disk->driverfs_dev = &device->dev;
234
235	sprintf(bank->disk->disk_name, "%s%d",
236	AXON_RAM_DEVICE_NAME, axon_ram_bank_id);
237	bank->disk->major = register_blkdev(0, bank->disk->disk_name);
238	if (bank->disk->major < 0) {
239	dev_err(&device->dev, "Cannot register block device\n");
240	rc = -EFAULT;
241	goto failed;
242	}
243
244	bank->disk->queue = blk_alloc_queue(GFP_KERNEL);
245	if (bank->disk->queue == NULL) {
246	dev_err(&device->dev, "Cannot register disk queue\n");
247	rc = -EFAULT;
248	goto failed;
249	}
250
251	set_capacity(bank->disk, bank->size >> AXON_RAM_SECTOR_SHIFT);
252	blk_queue_make_request(bank->disk->queue, axon_ram_make_request);
253	blk_queue_hardsect_size(bank->disk->queue, AXON_RAM_SECTOR_SIZE);
254	add_disk(bank->disk);
255
fedcd2c5 MS	256	bank->irq_id = irq_of_parse_and_map(device->node, 0);
fedcd2c5 MS	257	if (bank->irq_id == NO_IRQ) {
dbdf04c4 MS	258	dev_err(&device->dev, "Cannot access ECC interrupt ID\n");
	259	rc = -EFAULT;
	260	goto failed;
	261	}
	262
fedcd2c5	263	rc = request_irq(bank->irq_id, axon_ram_irq_handler,
dbdf04c4 MS	264	AXON_RAM_IRQ_FLAGS, bank->disk->disk_name, device);
	265	if (rc != 0) {
	266	dev_err(&device->dev, "Cannot register ECC interrupt handler\n");
fedcd2c5	267	bank->irq_id = NO_IRQ;
dbdf04c4 MS	268	rc = -EFAULT;
	269	goto failed;
	270	}
	271
	272	rc = device_create_file(&device->dev, &dev_attr_ecc);
	273	if (rc != 0) {
	274	dev_err(&device->dev, "Cannot create sysfs file\n");
	275	rc = -EFAULT;
	276	goto failed;
	277	}
	278
	279	return 0;
	280
	281	failed:
	282	if (bank != NULL) {
fedcd2c5 MS	283	if (bank->irq_id != NO_IRQ)
fedcd2c5 MS	284	free_irq(bank->irq_id, device);
dbdf04c4	285	if (bank->disk != NULL) {
dbdf04c4 MS	286	if (bank->disk->major > 0)
	287	unregister_blkdev(bank->disk->major,
	288	bank->disk->disk_name);
	289	del_gendisk(bank->disk);
	290	}
	291	device->dev.platform_data = NULL;
	292	if (bank->io_addr != 0)
	293	iounmap((void __iomem *) bank->io_addr);
	294	kfree(bank);
	295	}
	296
	297	return rc;
	298	}
	299
	300	/**
	301	* axon_ram_remove - remove() method for platform driver
	302	* @device: see of_platform_driver method
	303	*/
	304	static int
	305	axon_ram_remove(struct of_device *device)
	306	{
	307	struct axon_ram_bank *bank = device->dev.platform_data;
	308
	309	BUG_ON(!bank \|\| !bank->disk);
	310
	311	device_remove_file(&device->dev, &dev_attr_ecc);
fedcd2c5	312	free_irq(bank->irq_id, device);
dbdf04c4 MS	313	unregister_blkdev(bank->disk->major, bank->disk->disk_name);
	314	del_gendisk(bank->disk);
	315	iounmap((void __iomem *) bank->io_addr);
	316	kfree(bank);
	317
	318	return 0;
	319	}
	320
	321	static struct of_device_id axon_ram_device_id[] = {
	322	{
	323	.type = "dma-memory"
	324	},
	325	{}
	326	};
	327
	328	static struct of_platform_driver axon_ram_driver = {
dbdf04c4 MS	329	.match_table = axon_ram_device_id,
dbdf04c4 MS	330	.probe = axon_ram_probe,
84dd4676 SR	331	.remove = axon_ram_remove,
	332	.driver = {
	333	.owner = THIS_MODULE,
	334	.name = AXON_RAM_MODULE_NAME,
	335	},
dbdf04c4 MS	336	};
	337
	338	/**
	339	* axon_ram_init
	340	*/
	341	static int __init
	342	axon_ram_init(void)
	343	{
	344	return of_register_platform_driver(&axon_ram_driver);
	345	}
	346
	347	/**
	348	* axon_ram_exit
	349	*/
	350	static void __exit
	351	axon_ram_exit(void)
	352	{
	353	of_unregister_platform_driver(&axon_ram_driver);
	354	}
	355
	356	module_init(axon_ram_init);
	357	module_exit(axon_ram_exit);
	358
	359	MODULE_LICENSE("GPL");
	360	MODULE_AUTHOR("Maxim Shchetynin <maxim@de.ibm.com>");
	361	MODULE_DESCRIPTION("Axon DDR2 RAM device driver for IBM Cell BE");