[net-next-2.6.git] / drivers / mtd / devices / slram.c

/*======================================================================

  $Id: slram.c,v 1.36 2005/11/07 11:14:25 gleixner Exp $

  This driver provides a method to access memory not used by the kernel
  itself (i.e. if the kernel commandline mem=xxx is used). To actually
  use slram at least mtdblock or mtdchar is required (for block or
  character device access).

  Usage:

  if compiled as loadable module:
    modprobe slram map=<name>,<start>,<end/offset>
  if statically linked into the kernel use the following kernel cmd.line
    slram=<name>,<start>,<end/offset>

  <name>: name of the device that will be listed in /proc/mtd
  <start>: start of the memory region, decimal or hex (0xabcdef)
  <end/offset>: end of the memory region. It's possible to use +0x1234
                to specify the offset instead of the absolute address

  NOTE:
  With slram it's only possible to map a contigous memory region. Therfore
  if there's a device mapped somewhere in the region specified slram will
  fail to load (see kernel log if modprobe fails).

  -

  Jochen Schaeuble <psionic@psionic.de>

======================================================================*/


#include <linux/module.h>
#include <asm/uaccess.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <linux/ptrace.h>
#include <linux/slab.h>
#include <linux/string.h>
#include <linux/timer.h>
#include <linux/major.h>
#include <linux/fs.h>
#include <linux/ioctl.h>
#include <linux/init.h>
#include <asm/io.h>
#include <asm/system.h>

#include <linux/mtd/mtd.h>

#define SLRAM_MAX_DEVICES_PARAMS 6		/* 3 parameters / device */
#define SLRAM_BLK_SZ 0x4000

#define T(fmt, args...) printk(KERN_DEBUG fmt, ## args)
#define E(fmt, args...) printk(KERN_NOTICE fmt, ## args)

typedef struct slram_priv {
	u_char *start;
	u_char *end;
} slram_priv_t;

typedef struct slram_mtd_list {
	struct mtd_info *mtdinfo;
	struct slram_mtd_list *next;
} slram_mtd_list_t;

#ifdef MODULE
static char *map[SLRAM_MAX_DEVICES_PARAMS];

module_param_array(map, charp, NULL, 0);
MODULE_PARM_DESC(map, "List of memory regions to map. \"map=<name>, <start>, <length / end>\"");
#else
static char *map;
#endif

static slram_mtd_list_t *slram_mtdlist = NULL;

static int slram_erase(struct mtd_info *, struct erase_info *);
static int slram_point(struct mtd_info *, loff_t, size_t, size_t *, u_char **);
static void slram_unpoint(struct mtd_info *, u_char *, loff_t,	size_t);
static int slram_read(struct mtd_info *, loff_t, size_t, size_t *, u_char *);
static int slram_write(struct mtd_info *, loff_t, size_t, size_t *, const u_char *);

static int slram_erase(struct mtd_info *mtd, struct erase_info *instr)
{
	slram_priv_t *priv = mtd->priv;

	if (instr->addr + instr->len > mtd->size) {
		return(-EINVAL);
	}

	memset(priv->start + instr->addr, 0xff, instr->len);

	/* This'll catch a few races. Free the thing before returning :)
	 * I don't feel at all ashamed. This kind of thing is possible anyway
	 * with flash, but unlikely.
	 */

	instr->state = MTD_ERASE_DONE;

	mtd_erase_callback(instr);

	return(0);
}

static int slram_point(struct mtd_info *mtd, loff_t from, size_t len,
		size_t *retlen, u_char **mtdbuf)
{
	slram_priv_t *priv = mtd->priv;

	if (from + len > mtd->size)
		return -EINVAL;

	*mtdbuf = priv->start + from;
	*retlen = len;
	return(0);
}

static void slram_unpoint(struct mtd_info *mtd, u_char *addr, loff_t from, size_t len)
{
}

static int slram_read(struct mtd_info *mtd, loff_t from, size_t len,
		size_t *retlen, u_char *buf)
{
	slram_priv_t *priv = mtd->priv;

	if (from > mtd->size)
		return -EINVAL;

	if (from + len > mtd->size)
		len = mtd->size - from;

	memcpy(buf, priv->start + from, len);

	*retlen = len;
	return(0);
}

static int slram_write(struct mtd_info *mtd, loff_t to, size_t len,
		size_t *retlen, const u_char *buf)
{
	slram_priv_t *priv = mtd->priv;

	if (to + len > mtd->size)
		return -EINVAL;

	memcpy(priv->start + to, buf, len);

	*retlen = len;
	return(0);
}

/*====================================================================*/

static int register_device(char *name, unsigned long start, unsigned long length)
{
	slram_mtd_list_t **curmtd;

	curmtd = &slram_mtdlist;
	while (*curmtd) {
		curmtd = &(*curmtd)->next;
	}

	*curmtd = kmalloc(sizeof(slram_mtd_list_t), GFP_KERNEL);
	if (!(*curmtd)) {
		E("slram: Cannot allocate new MTD device.\n");
		return(-ENOMEM);
	}
	(*curmtd)->mtdinfo = kzalloc(sizeof(struct mtd_info), GFP_KERNEL);
	(*curmtd)->next = NULL;

	if ((*curmtd)->mtdinfo)	{
		(*curmtd)->mtdinfo->priv =
			kzalloc(sizeof(slram_priv_t), GFP_KERNEL);

		if (!(*curmtd)->mtdinfo->priv) {
			kfree((*curmtd)->mtdinfo);
			(*curmtd)->mtdinfo = NULL;
		}
	}

	if (!(*curmtd)->mtdinfo) {
		E("slram: Cannot allocate new MTD device.\n");
		return(-ENOMEM);
	}

	if (!(((slram_priv_t *)(*curmtd)->mtdinfo->priv)->start =
				ioremap(start, length))) {
		E("slram: ioremap failed\n");
		return -EIO;
	}
	((slram_priv_t *)(*curmtd)->mtdinfo->priv)->end =
		((slram_priv_t *)(*curmtd)->mtdinfo->priv)->start + length;


	(*curmtd)->mtdinfo->name = name;
	(*curmtd)->mtdinfo->size = length;
	(*curmtd)->mtdinfo->flags = MTD_CAP_RAM;
        (*curmtd)->mtdinfo->erase = slram_erase;
	(*curmtd)->mtdinfo->point = slram_point;
	(*curmtd)->mtdinfo->unpoint = slram_unpoint;
	(*curmtd)->mtdinfo->read = slram_read;
	(*curmtd)->mtdinfo->write = slram_write;
	(*curmtd)->mtdinfo->owner = THIS_MODULE;
	(*curmtd)->mtdinfo->type = MTD_RAM;
	(*curmtd)->mtdinfo->erasesize = SLRAM_BLK_SZ;
	(*curmtd)->mtdinfo->writesize = 1;

	if (add_mtd_device((*curmtd)->mtdinfo))	{
		E("slram: Failed to register new device\n");
		iounmap(((slram_priv_t *)(*curmtd)->mtdinfo->priv)->start);
		kfree((*curmtd)->mtdinfo->priv);
		kfree((*curmtd)->mtdinfo);
		return(-EAGAIN);
	}
	T("slram: Registered device %s from %luKiB to %luKiB\n", name,
			(start / 1024), ((start + length) / 1024));
	T("slram: Mapped from 0x%p to 0x%p\n",
			((slram_priv_t *)(*curmtd)->mtdinfo->priv)->start,
			((slram_priv_t *)(*curmtd)->mtdinfo->priv)->end);
	return(0);
}

static void unregister_devices(void)
{
	slram_mtd_list_t *nextitem;

	while (slram_mtdlist) {
		nextitem = slram_mtdlist->next;
		del_mtd_device(slram_mtdlist->mtdinfo);
		iounmap(((slram_priv_t *)slram_mtdlist->mtdinfo->priv)->start);
		kfree(slram_mtdlist->mtdinfo->priv);
		kfree(slram_mtdlist->mtdinfo);
		kfree(slram_mtdlist);
		slram_mtdlist = nextitem;
	}
}

static unsigned long handle_unit(unsigned long value, char *unit)
{
	if ((*unit == 'M') || (*unit == 'm')) {
		return(value * 1024 * 1024);
	} else if ((*unit == 'K') || (*unit == 'k')) {
		return(value * 1024);
	}
	return(value);
}

static int parse_cmdline(char *devname, char *szstart, char *szlength)
{
	char *buffer;
	unsigned long devstart;
	unsigned long devlength;

	if ((!devname) || (!szstart) || (!szlength)) {
		unregister_devices();
		return(-EINVAL);
	}

	devstart = simple_strtoul(szstart, &buffer, 0);
	devstart = handle_unit(devstart, buffer);

	if (*(szlength) != '+') {
		devlength = simple_strtoul(szlength, &buffer, 0);
		devlength = handle_unit(devlength, buffer) - devstart;
	} else {
		devlength = simple_strtoul(szlength + 1, &buffer, 0);
		devlength = handle_unit(devlength, buffer);
	}
	T("slram: devname=%s, devstart=0x%lx, devlength=0x%lx\n",
			devname, devstart, devlength);
	if ((devstart < 0) || (devlength < 0) || (devlength % SLRAM_BLK_SZ != 0)) {
		E("slram: Illegal start / length parameter.\n");
		return(-EINVAL);
	}

	if ((devstart = register_device(devname, devstart, devlength))){
		unregister_devices();
		return((int)devstart);
	}
	return(0);
}

#ifndef MODULE

static int __init mtd_slram_setup(char *str)
{
	map = str;
	return(1);
}

__setup("slram=", mtd_slram_setup);

#endif

static int init_slram(void)
{
	char *devname;
	int i;

#ifndef MODULE
	char *devstart;
	char *devlength;

	i = 0;

	if (!map) {
		E("slram: not enough parameters.\n");
		return(-EINVAL);
	}
	while (map) {
		devname = devstart = devlength = NULL;

		if (!(devname = strsep(&map, ","))) {
			E("slram: No devicename specified.\n");
			break;
		}
		T("slram: devname = %s\n", devname);
		if ((!map) || (!(devstart = strsep(&map, ",")))) {
			E("slram: No devicestart specified.\n");
		}
		T("slram: devstart = %s\n", devstart);
		if ((!map) || (!(devlength = strsep(&map, ",")))) {
			E("slram: No devicelength / -end specified.\n");
		}
		T("slram: devlength = %s\n", devlength);
		if (parse_cmdline(devname, devstart, devlength) != 0) {
			return(-EINVAL);
		}
	}
#else
	int count;

	for (count = 0; (map[count]) && (count < SLRAM_MAX_DEVICES_PARAMS);
			count++) {
	}

	if ((count % 3 != 0) || (count == 0)) {
		E("slram: not enough parameters.\n");
		return(-EINVAL);
	}
	for (i = 0; i < (count / 3); i++) {
		devname = map[i * 3];

		if (parse_cmdline(devname, map[i * 3 + 1], map[i * 3 + 2])!=0) {
			return(-EINVAL);
		}

	}
#endif /* !MODULE */

	return(0);
}

static void __exit cleanup_slram(void)
{
	unregister_devices();
}

module_init(init_slram);
module_exit(cleanup_slram);

MODULE_LICENSE("GPL");
MODULE_AUTHOR("Jochen Schaeuble <psionic@psionic.de>");
MODULE_DESCRIPTION("MTD driver for uncached system RAM");
Commit	Line	Data
1da177e4 LT	1	/*======================================================================
1da177e4 LT	2
e5580fbe	3	$Id: slram.c,v 1.36 2005/11/07 11:14:25 gleixner Exp $
1da177e4 LT	4
	5	This driver provides a method to access memory not used by the kernel
	6	itself (i.e. if the kernel commandline mem=xxx is used). To actually
	7	use slram at least mtdblock or mtdchar is required (for block or
	8	character device access).
	9
	10	Usage:
	11
	12	if compiled as loadable module:
	13	modprobe slram map=<name>,<start>,<end/offset>
	14	if statically linked into the kernel use the following kernel cmd.line
	15	slram=<name>,<start>,<end/offset>
	16
	17	<name>: name of the device that will be listed in /proc/mtd
	18	<start>: start of the memory region, decimal or hex (0xabcdef)
	19	<end/offset>: end of the memory region. It's possible to use +0x1234
	20	to specify the offset instead of the absolute address
e5580fbe	21
1da177e4 LT	22	NOTE:
	23	With slram it's only possible to map a contigous memory region. Therfore
	24	if there's a device mapped somewhere in the region specified slram will
	25	fail to load (see kernel log if modprobe fails).
	26
	27	-
e5580fbe	28
1da177e4 LT	29	Jochen Schaeuble <psionic@psionic.de>
	30
	31	======================================================================*/
	32
	33
	34	#include <linux/module.h>
	35	#include <asm/uaccess.h>
	36	#include <linux/types.h>
	37	#include <linux/kernel.h>
1da177e4 LT	38	#include <linux/ptrace.h>
	39	#include <linux/slab.h>
	40	#include <linux/string.h>
	41	#include <linux/timer.h>
	42	#include <linux/major.h>
	43	#include <linux/fs.h>
	44	#include <linux/ioctl.h>
	45	#include <linux/init.h>
	46	#include <asm/io.h>
	47	#include <asm/system.h>
	48
	49	#include <linux/mtd/mtd.h>
	50
	51	#define SLRAM_MAX_DEVICES_PARAMS 6 /* 3 parameters / device */
14f8351a	52	#define SLRAM_BLK_SZ 0x4000
1da177e4 LT	53
	54	#define T(fmt, args...) printk(KERN_DEBUG fmt, ## args)
	55	#define E(fmt, args...) printk(KERN_NOTICE fmt, ## args)
	56
	57	typedef struct slram_priv {
	58	u_char *start;
	59	u_char *end;
	60	} slram_priv_t;
	61
	62	typedef struct slram_mtd_list {
	63	struct mtd_info *mtdinfo;
	64	struct slram_mtd_list *next;
	65	} slram_mtd_list_t;
	66
	67	#ifdef MODULE
	68	static char *map[SLRAM_MAX_DEVICES_PARAMS];
	69
	70	module_param_array(map, charp, NULL, 0);
	71	MODULE_PARM_DESC(map, "List of memory regions to map. \"map=<name>, <start>, <length / end>\"");
	72	#else
	73	static char *map;
	74	#endif
	75
	76	static slram_mtd_list_t *slram_mtdlist = NULL;
	77
	78	static int slram_erase(struct mtd_info , struct erase_info );
	79	static int slram_point(struct mtd_info , loff_t, size_t, size_t , u_char **);
	80	static void slram_unpoint(struct mtd_info , u_char , loff_t, size_t);
	81	static int slram_read(struct mtd_info , loff_t, size_t, size_t , u_char *);
	82	static int slram_write(struct mtd_info , loff_t, size_t, size_t , const u_char *);
	83
	84	static int slram_erase(struct mtd_info mtd, struct erase_info instr)
	85	{
	86	slram_priv_t *priv = mtd->priv;
	87
	88	if (instr->addr + instr->len > mtd->size) {
	89	return(-EINVAL);
	90	}
e5580fbe	91
1da177e4 LT	92	memset(priv->start + instr->addr, 0xff, instr->len);
1da177e4 LT	93
e5580fbe	94	/* This'll catch a few races. Free the thing before returning :)
1da177e4 LT	95	* I don't feel at all ashamed. This kind of thing is possible anyway
	96	* with flash, but unlikely.
	97	*/
	98
	99	instr->state = MTD_ERASE_DONE;
	100
	101	mtd_erase_callback(instr);
	102
	103	return(0);
	104	}
	105
	106	static int slram_point(struct mtd_info *mtd, loff_t from, size_t len,
	107	size_t retlen, u_char *mtdbuf)
	108	{
	109	slram_priv_t *priv = mtd->priv;
	110
14f8351a JB	111	if (from + len > mtd->size)
	112	return -EINVAL;
	113
1da177e4 LT	114	*mtdbuf = priv->start + from;
	115	*retlen = len;
	116	return(0);
	117	}
	118
	119	static void slram_unpoint(struct mtd_info mtd, u_char addr, loff_t from, size_t len)
	120	{
	121	}
	122
	123	static int slram_read(struct mtd_info *mtd, loff_t from, size_t len,
	124	size_t retlen, u_char buf)
	125	{
	126	slram_priv_t *priv = mtd->priv;
14f8351a JB	127
	128	if (from > mtd->size)
	129	return -EINVAL;
	130
	131	if (from + len > mtd->size)
	132	len = mtd->size - from;
	133
1da177e4 LT	134	memcpy(buf, priv->start + from, len);
	135
	136	*retlen = len;
	137	return(0);
	138	}
	139
	140	static int slram_write(struct mtd_info *mtd, loff_t to, size_t len,
	141	size_t retlen, const u_char buf)
	142	{
	143	slram_priv_t *priv = mtd->priv;
	144
14f8351a JB	145	if (to + len > mtd->size)
	146	return -EINVAL;
	147
1da177e4 LT	148	memcpy(priv->start + to, buf, len);
	149
	150	*retlen = len;
	151	return(0);
	152	}
	153
	154	/====================================================================/
	155
	156	static int register_device(char *name, unsigned long start, unsigned long length)
	157	{
	158	slram_mtd_list_t **curmtd;
	159
	160	curmtd = &slram_mtdlist;
	161	while (*curmtd) {
	162	curmtd = &(*curmtd)->next;
	163	}
	164
	165	*curmtd = kmalloc(sizeof(slram_mtd_list_t), GFP_KERNEL);
	166	if (!(*curmtd)) {
	167	E("slram: Cannot allocate new MTD device.\n");
	168	return(-ENOMEM);
	169	}
95b93a0c	170	(*curmtd)->mtdinfo = kzalloc(sizeof(struct mtd_info), GFP_KERNEL);
1da177e4	171	(*curmtd)->next = NULL;
e5580fbe	172
1da177e4	173	if ((*curmtd)->mtdinfo) {
1da177e4	174	(*curmtd)->mtdinfo->priv =
95b93a0c	175	kzalloc(sizeof(slram_priv_t), GFP_KERNEL);
e5580fbe	176
1da177e4 LT	177	if (!(*curmtd)->mtdinfo->priv) {
	178	kfree((*curmtd)->mtdinfo);
	179	(*curmtd)->mtdinfo = NULL;
1da177e4 LT	180	}
	181	}
	182
	183	if (!(*curmtd)->mtdinfo) {
	184	E("slram: Cannot allocate new MTD device.\n");
	185	return(-ENOMEM);
	186	}
e5580fbe	187
1da177e4 LT	188	if (!(((slram_priv_t )(curmtd)->mtdinfo->priv)->start =
	189	ioremap(start, length))) {
	190	E("slram: ioremap failed\n");
	191	return -EIO;
	192	}
	193	((slram_priv_t )(curmtd)->mtdinfo->priv)->end =
	194	((slram_priv_t )(curmtd)->mtdinfo->priv)->start + length;
	195
	196
	197	(*curmtd)->mtdinfo->name = name;
	198	(*curmtd)->mtdinfo->size = length;
a6c591ed	199	(*curmtd)->mtdinfo->flags = MTD_CAP_RAM;
1da177e4 LT	200	(*curmtd)->mtdinfo->erase = slram_erase;
	201	(*curmtd)->mtdinfo->point = slram_point;
	202	(*curmtd)->mtdinfo->unpoint = slram_unpoint;
	203	(*curmtd)->mtdinfo->read = slram_read;
	204	(*curmtd)->mtdinfo->write = slram_write;
	205	(*curmtd)->mtdinfo->owner = THIS_MODULE;
21c8db9e	206	(*curmtd)->mtdinfo->type = MTD_RAM;
14f8351a	207	(*curmtd)->mtdinfo->erasesize = SLRAM_BLK_SZ;
17ffc7ba	208	(*curmtd)->mtdinfo->writesize = 1;
1da177e4 LT	209
	210	if (add_mtd_device((*curmtd)->mtdinfo)) {
	211	E("slram: Failed to register new device\n");
	212	iounmap(((slram_priv_t )(curmtd)->mtdinfo->priv)->start);
	213	kfree((*curmtd)->mtdinfo->priv);
	214	kfree((*curmtd)->mtdinfo);
	215	return(-EAGAIN);
	216	}
	217	T("slram: Registered device %s from %luKiB to %luKiB\n", name,
	218	(start / 1024), ((start + length) / 1024));
	219	T("slram: Mapped from 0x%p to 0x%p\n",
	220	((slram_priv_t )(curmtd)->mtdinfo->priv)->start,
	221	((slram_priv_t )(curmtd)->mtdinfo->priv)->end);
e5580fbe	222	return(0);
1da177e4 LT	223	}
	224
	225	static void unregister_devices(void)
	226	{
	227	slram_mtd_list_t *nextitem;
	228
	229	while (slram_mtdlist) {
	230	nextitem = slram_mtdlist->next;
	231	del_mtd_device(slram_mtdlist->mtdinfo);
	232	iounmap(((slram_priv_t *)slram_mtdlist->mtdinfo->priv)->start);
	233	kfree(slram_mtdlist->mtdinfo->priv);
	234	kfree(slram_mtdlist->mtdinfo);
	235	kfree(slram_mtdlist);
	236	slram_mtdlist = nextitem;
	237	}
	238	}
	239
	240	static unsigned long handle_unit(unsigned long value, char *unit)
	241	{
	242	if ((unit == 'M') \|\| (unit == 'm')) {
	243	return(value * 1024 * 1024);
	244	} else if ((unit == 'K') \|\| (unit == 'k')) {
	245	return(value * 1024);
	246	}
	247	return(value);
	248	}
	249
	250	static int parse_cmdline(char devname, char szstart, char *szlength)
	251	{
	252	char *buffer;
	253	unsigned long devstart;
	254	unsigned long devlength;
e5580fbe	255
1da177e4 LT	256	if ((!devname) \|\| (!szstart) \|\| (!szlength)) {
	257	unregister_devices();
	258	return(-EINVAL);
	259	}
	260
	261	devstart = simple_strtoul(szstart, &buffer, 0);
	262	devstart = handle_unit(devstart, buffer);
e5580fbe	263
1da177e4 LT	264	if (*(szlength) != '+') {
	265	devlength = simple_strtoul(szlength, &buffer, 0);
	266	devlength = handle_unit(devlength, buffer) - devstart;
	267	} else {
	268	devlength = simple_strtoul(szlength + 1, &buffer, 0);
	269	devlength = handle_unit(devlength, buffer);
	270	}
	271	T("slram: devname=%s, devstart=0x%lx, devlength=0x%lx\n",
	272	devname, devstart, devlength);
14f8351a	273	if ((devstart < 0) \|\| (devlength < 0) \|\| (devlength % SLRAM_BLK_SZ != 0)) {
1da177e4 LT	274	E("slram: Illegal start / length parameter.\n");
	275	return(-EINVAL);
	276	}
e5580fbe	277
1da177e4 LT	278	if ((devstart = register_device(devname, devstart, devlength))){
	279	unregister_devices();
	280	return((int)devstart);
	281	}
	282	return(0);
	283	}
	284
	285	#ifndef MODULE
	286
	287	static int __init mtd_slram_setup(char *str)
	288	{
	289	map = str;
	290	return(1);
	291	}
	292
	293	__setup("slram=", mtd_slram_setup);
	294
	295	#endif
	296
	297	static int init_slram(void)
	298	{
	299	char *devname;
	300	int i;
	301
	302	#ifndef MODULE
	303	char *devstart;
	304	char *devlength;
	305
	306	i = 0;
	307
	308	if (!map) {
	309	E("slram: not enough parameters.\n");
	310	return(-EINVAL);
	311	}
	312	while (map) {
	313	devname = devstart = devlength = NULL;
	314
	315	if (!(devname = strsep(&map, ","))) {
	316	E("slram: No devicename specified.\n");
	317	break;
	318	}
	319	T("slram: devname = %s\n", devname);
	320	if ((!map) \|\| (!(devstart = strsep(&map, ",")))) {
	321	E("slram: No devicestart specified.\n");
	322	}
	323	T("slram: devstart = %s\n", devstart);
	324	if ((!map) \|\| (!(devlength = strsep(&map, ",")))) {
	325	E("slram: No devicelength / -end specified.\n");
	326	}
	327	T("slram: devlength = %s\n", devlength);
	328	if (parse_cmdline(devname, devstart, devlength) != 0) {
	329	return(-EINVAL);
	330	}
	331	}
	332	#else
	333	int count;
e5580fbe	334
1da177e4 LT	335	for (count = 0; (map[count]) && (count < SLRAM_MAX_DEVICES_PARAMS);
	336	count++) {
	337	}
	338
	339	if ((count % 3 != 0) \|\| (count == 0)) {
	340	E("slram: not enough parameters.\n");
	341	return(-EINVAL);
	342	}
	343	for (i = 0; i < (count / 3); i++) {
	344	devname = map[i * 3];
	345
	346	if (parse_cmdline(devname, map[i * 3 + 1], map[i * 3 + 2])!=0) {
	347	return(-EINVAL);
	348	}
e5580fbe	349
1da177e4 LT	350	}
1da177e4 LT	351	#endif /* !MODULE */
e5580fbe	352
1da177e4 LT	353	return(0);
	354	}
	355
	356	static void __exit cleanup_slram(void)
	357	{
	358	unregister_devices();
	359	}
	360
	361	module_init(init_slram);
	362	module_exit(cleanup_slram);
	363
	364	MODULE_LICENSE("GPL");
	365	MODULE_AUTHOR("Jochen Schaeuble <psionic@psionic.de>");
	366	MODULE_DESCRIPTION("MTD driver for uncached system RAM");