17e86d3879
Signed-off-by: Banajit Goswami <banajit.g@samsung.com> Signed-off-by: Kukjin Kim <kgene.kim@samsung.com>
125 lines
2.9 KiB
C
125 lines
2.9 KiB
C
/*
|
|
* S3C series device definition for nand device
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify
|
|
* it under the terms of the GNU General Public License version 2 as
|
|
* published by the Free Software Foundation.
|
|
*/
|
|
|
|
#include <linux/gfp.h>
|
|
#include <linux/kernel.h>
|
|
#include <linux/platform_device.h>
|
|
|
|
#include <linux/mtd/mtd.h>
|
|
#include <linux/mtd/partitions.h>
|
|
|
|
#include <mach/map.h>
|
|
#include <plat/devs.h>
|
|
#include <plat/nand.h>
|
|
|
|
static struct resource s3c_nand_resource[] = {
|
|
[0] = {
|
|
.start = S3C_PA_NAND,
|
|
.end = S3C_PA_NAND + SZ_1M,
|
|
.flags = IORESOURCE_MEM,
|
|
}
|
|
};
|
|
|
|
struct platform_device s3c_device_nand = {
|
|
.name = "s3c2410-nand",
|
|
.id = -1,
|
|
.num_resources = ARRAY_SIZE(s3c_nand_resource),
|
|
.resource = s3c_nand_resource,
|
|
};
|
|
|
|
EXPORT_SYMBOL(s3c_device_nand);
|
|
|
|
/**
|
|
* s3c_nand_copy_set() - copy nand set data
|
|
* @set: The new structure, directly copied from the old.
|
|
*
|
|
* Copy all the fields from the NAND set field from what is probably __initdata
|
|
* to new kernel memory. The code returns 0 if the copy happened correctly or
|
|
* an error code for the calling function to display.
|
|
*
|
|
* Note, we currently do not try and look to see if we've already copied the
|
|
* data in a previous set.
|
|
*/
|
|
static int __init s3c_nand_copy_set(struct s3c2410_nand_set *set)
|
|
{
|
|
void *ptr;
|
|
int size;
|
|
|
|
size = sizeof(struct mtd_partition) * set->nr_partitions;
|
|
if (size) {
|
|
ptr = kmemdup(set->partitions, size, GFP_KERNEL);
|
|
set->partitions = ptr;
|
|
|
|
if (!ptr)
|
|
return -ENOMEM;
|
|
}
|
|
|
|
if (set->nr_map && set->nr_chips) {
|
|
size = sizeof(int) * set->nr_chips;
|
|
ptr = kmemdup(set->nr_map, size, GFP_KERNEL);
|
|
set->nr_map = ptr;
|
|
|
|
if (!ptr)
|
|
return -ENOMEM;
|
|
}
|
|
|
|
if (set->ecc_layout) {
|
|
ptr = kmemdup(set->ecc_layout,
|
|
sizeof(struct nand_ecclayout), GFP_KERNEL);
|
|
set->ecc_layout = ptr;
|
|
|
|
if (!ptr)
|
|
return -ENOMEM;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
void __init s3c_nand_set_platdata(struct s3c2410_platform_nand *nand)
|
|
{
|
|
struct s3c2410_platform_nand *npd;
|
|
int size;
|
|
int ret;
|
|
|
|
/* note, if we get a failure in allocation, we simply drop out of the
|
|
* function. If there is so little memory available at initialisation
|
|
* time then there is little chance the system is going to run.
|
|
*/
|
|
|
|
npd = s3c_set_platdata(nand, sizeof(struct s3c2410_platform_nand),
|
|
&s3c_device_nand);
|
|
if (!npd)
|
|
return;
|
|
|
|
/* now see if we need to copy any of the nand set data */
|
|
|
|
size = sizeof(struct s3c2410_nand_set) * npd->nr_sets;
|
|
if (size) {
|
|
struct s3c2410_nand_set *from = npd->sets;
|
|
struct s3c2410_nand_set *to;
|
|
int i;
|
|
|
|
to = kmemdup(from, size, GFP_KERNEL);
|
|
npd->sets = to; /* set, even if we failed */
|
|
|
|
if (!to) {
|
|
printk(KERN_ERR "%s: no memory for sets\n", __func__);
|
|
return;
|
|
}
|
|
|
|
for (i = 0; i < npd->nr_sets; i++) {
|
|
ret = s3c_nand_copy_set(to);
|
|
if (ret) {
|
|
printk(KERN_ERR "%s: failed to copy set %d\n",
|
|
__func__, i);
|
|
return;
|
|
}
|
|
to++;
|
|
}
|
|
}
|
|
}
|