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