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/*******************************************************************
* Simple Flash mapping for RDC3210 *
* *
* 2005.03.23 *
* Dante Su (dante_su@gemtek.com.tw) *
* Copyright (C) 2005 Gemtek Corporation *
*******************************************************************/
#include <linux/module.h>
#include <linux/types.h>
#include <linux/kernel.h>
#include <asm/io.h>
#include <linux/mtd/mtd.h>
#include <linux/mtd/map.h>
#include <linux/mtd/partitions.h>
#include <linux/config.h>
#ifndef RDC3210_STATIC_MAP
#define RDC3210_STATIC_MAP 0
#endif
#ifndef RDC3210_FACTORY_DFLT
#define RDC3210_FACTORY_DFLT 0
#endif
#ifndef RDC3210_USING_JFFS2
#define RDC3210_USING_JFFS2 1
#endif
#define WINDOW_ADDR 0xFFC00000
#define WINDOW_SIZE 0x00400000
#define BUSWIDTH 2
/* Dante: linked from linux-2.4.x/drivers/mtd/chips/flashdrv.c */
extern int flashdrv_get_size(void);
extern int flashdrv_get_sector(int addr);
extern int flashdrv_get_sector_addr(int sector);
extern int flashdrv_get_sector_size(int sector);
static struct mtd_info *rdc3210_mtd;
__u8 rdc3210_map_read8(struct map_info *map, unsigned long ofs)
{
return *(__u8 *)(map->map_priv_1 + ofs);
}
__u16 rdc3210_map_read16(struct map_info *map, unsigned long ofs)
{
return *(__u16 *)(map->map_priv_1 + ofs);
}
__u32 rdc3210_map_read32(struct map_info *map, unsigned long ofs)
{
return *(__u32 *)(map->map_priv_1 + ofs);
}
void rdc3210_map_write8(struct map_info *map, __u8 d, unsigned long adr)
{
*(__u8 *)(map->map_priv_1 + adr) = d;
}
void rdc3210_map_write16(struct map_info *map, __u16 d, unsigned long adr)
{
*(__u16 *)(map->map_priv_1 + adr) = d;
}
void rdc3210_map_write32(struct map_info *map, __u32 d, unsigned long adr)
{
*(__u32 *)(map->map_priv_1 + adr) = d;
}
void rdc3210_map_copy_from(struct map_info *map, void *to, unsigned long from, ssize_t len)
{
int i;
u16 *dst = (u16 *)(to);
u16 *src = (u16 *)(map->map_priv_1 + from);
for(i = 0; i < (len / 2); ++i)
dst[i] = src[i];
if(len & 1)
{
printk("# WARNNING!!! rdc3210_map_copy_from has odd length\n");
//dst[len - 1] = B0(src[i]);
}
}
void rdc3210_map_copy_to(struct map_info *map, void *to, unsigned long from, ssize_t len)
{
int i;
u16 *dst = (u16 *)(map->map_priv_1 + to);
u16 *src = (u16 *)(from);
for(i = 0; i < (len / 2); ++i)
dst[i] = src[i];
if(len & 1)
{
printk("# WARNNING!!! rdc3210_map_copy_from has odd length\n");
//dst[len - 1] = B0(src[i]);
}
}
struct map_info rdc3210_map =
{
name: "RDC3210 Flash",
size: WINDOW_SIZE,
buswidth: BUSWIDTH,
read8: rdc3210_map_read8,
read16: rdc3210_map_read16,
read32: rdc3210_map_read32,
copy_from: rdc3210_map_copy_from,
write8: rdc3210_map_write8,
write16: rdc3210_map_write16,
write32: rdc3210_map_write32,
copy_to: rdc3210_map_copy_to,
};
/* Dante: This is the default static mapping, however this is nothing but a hint. (Say dynamic mapping) */
static struct mtd_partition rdc3210_parts[] =
{
{ name: "linux", offset: 0, size: 0x003C0000 }, /* 3840 KB = (Kernel + ROMFS) = (768 KB + 3072 KB) */
{ name: "romfs", offset: 0x000C0000, size: 0x00300000 }, /* 3072 KB */
{ name: "nvram", offset: 0x003C0000, size: 0x00010000 }, /* 64 KB */
#if RDC3210_STATIC_MAP || RDC3210_FACTORY_DFLT
{ name: "factory", offset: 0x003D0000, size: 0x00010000 }, /* 64 KB */
#endif
{ name: "bootldr", offset: 0x003E0000, size: 0x00020000 }, /* 128 KB */
};
#if LINUX_VERSION_CODE < 0x20212 && defined(MODULE)
#define init_rdc3210_map init_module
#define cleanup_rdc3210_map cleanup_module
#endif
mod_init_t init_rdc3210_map(void)
{
printk(KERN_NOTICE "flash device: %x at %x\n", WINDOW_SIZE, WINDOW_ADDR);
rdc3210_map.map_priv_1 = ioremap(WINDOW_ADDR, WINDOW_SIZE);
if (!rdc3210_map.map_priv_1)
{
printk("Failed to ioremap\n");
return -EIO;
}
rdc3210_mtd = do_map_probe("cfi_probe", &rdc3210_map);
#if RDC3210_STATIC_MAP /* Dante: This is for fixed map */
if (rdc3210_mtd)
{
rdc3210_mtd->module = THIS_MODULE;
add_mtd_partitions(rdc3210_mtd, rdc3210_parts, sizeof(rdc3210_parts)/sizeof(rdc3210_parts[0]));
return 0;
}
#else /* Dante: This is for dynamic mapping */
#include <gemtek/sysdep.h>
#include <gemtek/imghdr.h>
if (rdc3210_mtd)
{ // Dante
#if RDC3210_USING_JFFS2
unsigned int tmp, tmp2 = rdc3210_mtd->erasesize;
#else
unsigned int tmp, tmp2 = 32;
#endif
gt_imghdr_t *hdr;
hdr = (gt_imghdr_t *)(rdc3210_map.map_priv_1);
if(memcmp(hdr->magic, GTIMG_MAGIC, 4))
{
printk("Invalid MAGIC for Firmware Image!!!\n");
return -EIO;
}
#if RDC3210_FACTORY_DFLT
/* 1. Adjust Redboot */
tmp = flashdrv_get_size() - rdc3210_parts[4].size;
rdc3210_parts[4].offset = flashdrv_get_sector_addr(flashdrv_get_sector(tmp));
rdc3210_parts[4].size = flashdrv_get_size() - rdc3210_parts[4].offset;
/* 2. Adjust NVRAM */
tmp -= rdc3210_parts[3].size;
rdc3210_parts[3].offset = flashdrv_get_sector_addr(flashdrv_get_sector(tmp));
rdc3210_parts[3].size = rdc3210_parts[4].offset - rdc3210_parts[3].offset;
/* 3. Adjust Factory Default */
tmp -= rdc3210_parts[2].size;
rdc3210_parts[2].offset = flashdrv_get_sector_addr(flashdrv_get_sector(tmp));
rdc3210_parts[2].size = rdc3210_parts[3].offset - rdc3210_parts[2].offset;
/* 4. Adjust Linux (Kernel + ROMFS) */
rdc3210_parts[0].size = rdc3210_parts[2].offset - rdc3210_parts[0].offset;
/* 5. Adjust ROMFS */
tmp = hdr->kernelsz + sizeof(gt_imghdr_t);
rdc3210_parts[1].offset = rdc3210_parts[0].offset + (((tmp / tmp2) + ((tmp % tmp2) ? 1 : 0)) * tmp2);
rdc3210_parts[1].size = rdc3210_parts[2].offset - rdc3210_parts[1].offset;
#else
/* 1. Adjust Redboot */
tmp = flashdrv_get_size() - rdc3210_parts[3].size;
rdc3210_parts[3].offset = flashdrv_get_sector_addr(flashdrv_get_sector(tmp));
rdc3210_parts[3].size = flashdrv_get_size() - rdc3210_parts[3].offset;
/* 2. Adjust NVRAM */
tmp -= rdc3210_parts[2].size;
rdc3210_parts[2].offset = flashdrv_get_sector_addr(flashdrv_get_sector(tmp));
rdc3210_parts[2].size = rdc3210_parts[3].offset - rdc3210_parts[2].offset;
/* 4. Adjust Linux (Kernel + ROMFS) */
rdc3210_parts[0].size = rdc3210_parts[2].offset - rdc3210_parts[0].offset;
/* 5. Adjust ROMFS */
tmp = hdr->kernelsz + sizeof(gt_imghdr_t);
rdc3210_parts[1].offset = rdc3210_parts[0].offset + (((tmp / tmp2) + ((tmp % tmp2) ? 1 : 0)) * tmp2);
rdc3210_parts[1].size = rdc3210_parts[2].offset - rdc3210_parts[1].offset;
#endif
rdc3210_mtd->module = THIS_MODULE;
add_mtd_partitions(rdc3210_mtd, rdc3210_parts, sizeof(rdc3210_parts)/sizeof(rdc3210_parts[0]));
return 0;
}
#endif
iounmap((void *)rdc3210_map.map_priv_1);
return -ENXIO;
}
mod_exit_t cleanup_rdc3210_map(void)
{
if (rdc3210_mtd)
{
del_mtd_partitions(rdc3210_mtd);
map_destroy(rdc3210_mtd);
}
if (rdc3210_map.map_priv_1)
{
iounmap((void *)rdc3210_map.map_priv_1);
rdc3210_map.map_priv_1 = NULL;
}
}
module_init(init_rdc3210_map);
module_exit(cleanup_rdc3210_map);
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