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