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author | Ben Dooks <ben-linux@fluff.org> | 2010-01-06 02:45:09 +0900 |
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committer | Ben Dooks <ben-linux@fluff.org> | 2010-01-15 17:10:13 +0900 |
commit | b6a604137bb978d9f65b1228cf0bb691ece45cba (patch) | |
tree | 9fe4d3df50c44249d7a4344bb137b96904d627fb /arch/arm/plat-samsung/dev-nand.c | |
parent | 9745626b65b856bf58e70feb4eee1e5471db699e (diff) | |
download | op-kernel-dev-b6a604137bb978d9f65b1228cf0bb691ece45cba.zip op-kernel-dev-b6a604137bb978d9f65b1228cf0bb691ece45cba.tar.gz |
ARM: SAMSUNG: Move device definitions in plat-samsung
Move all the platform device definitions from plat-s3c into plat-samsung
Signed-off-by: Ben Dooks <ben-linux@fluff.org>
Diffstat (limited to 'arch/arm/plat-samsung/dev-nand.c')
-rw-r--r-- | arch/arm/plat-samsung/dev-nand.c | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/arch/arm/plat-samsung/dev-nand.c b/arch/arm/plat-samsung/dev-nand.c new file mode 100644 index 0000000..a52fb6c --- /dev/null +++ b/arch/arm/plat-samsung/dev-nand.c @@ -0,0 +1,129 @@ +/* + * 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/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 = kmemdup(nand, sizeof(struct s3c2410_platform_nand), GFP_KERNEL); + if (!npd) { + printk(KERN_ERR "%s: failed copying platform data\n", __func__); + 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++; + } + } + + s3c_device_nand.dev.platform_data = npd; +} + +EXPORT_SYMBOL_GPL(s3c_nand_set_platdata); |