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-rw-r--r--fs/yaffs2/mtdemul/nandemul2k.c714
1 files changed, 0 insertions, 714 deletions
diff --git a/fs/yaffs2/mtdemul/nandemul2k.c b/fs/yaffs2/mtdemul/nandemul2k.c
deleted file mode 100644
index bcbf16a..0000000
--- a/fs/yaffs2/mtdemul/nandemul2k.c
+++ /dev/null
@@ -1,714 +0,0 @@
-/*
- * YAFFS: Yet Another Flash File System. A NAND-flash specific file system.
- *
- * Copyright (C) 2002-2007 Aleph One Ltd.
- * for Toby Churchill Ltd and Brightstar Engineering
- *
- * Created by Charles Manning <charles@aleph1.co.uk>
- *
- * 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.
- */
-
-/*
- * This version hacked for emulating 2kpage NAND for YAFFS2 testing.
- */
-
-#include <linux/config.h>
-#include <linux/kernel.h>
-#include <linux/module.h>
-#include <linux/version.h>
-#include <linux/slab.h>
-#include <linux/init.h>
-#include <linux/list.h>
-#include <linux/fs.h>
-#include <linux/proc_fs.h>
-#include <linux/pagemap.h>
-#include <linux/mtd/mtd.h>
-#include <linux/interrupt.h>
-#include <linux/string.h>
-#if (LINUX_VERSION_CODE < KERNEL_VERSION(2,5,0))
-#include <linux/locks.h>
-#endif
-
-#include <asm/uaccess.h>
-#include <linux/mtd/mtd.h>
-#include <linux/mtd/partitions.h>
-#include <linux/mtd/nand.h>
-#include "../yaffs_nandemul2k.h"
-
-#define ALLOCATE(x) kmalloc(x,GFP_KERNEL)
-#define FREE(x) kfree(x)
-
-
-
-
-
-#define NAND_SHIFT (11) // Shifter for 2k
-#define PAGE_DATA_SIZE (1 << NAND_SHIFT)
-#define PAGE_SPARE_SIZE (64)
-#define BLK_SHIFT 6
-#define PAGES_PER_BLOCK (1 << BLK_SHIFT) // = 64
-
-
-#define EM_SIZE_IN_MEG 4
-#define EM_SIZE_IN_BYTES (EM_SIZE_IN_MEG * (1<<20))
-
-#define PAGE_TOTAL_SIZE (PAGE_DATA_SIZE+PAGE_SPARE_SIZE)
-
-#define BLOCK_TOTAL_SIZE (PAGES_PER_BLOCK * PAGE_TOTAL_SIZE)
-
-#define BLOCKS_PER_MEG ((1<<20)/(PAGES_PER_BLOCK * PAGE_DATA_SIZE))
-
-
-static struct mtd_info nandemul2k_mtd;
-
-typedef struct
-{
- __u8 data[PAGE_TOTAL_SIZE]; // Data + spare
- int empty; // is this empty?
-} nandemul_Page;
-
-
-typedef struct
-{
- nandemul_Page *page[PAGES_PER_BLOCK];
- int damaged;
-} nandemul_Block;
-
-
-
-typedef struct
-{
- nandemul_Block**block;
- int nBlocks;
-} nandemul_Device;
-
-static nandemul_Device ned;
-
-static int sizeInMB = EM_SIZE_IN_MEG;
-
-
-static void nandemul_yield(int n)
-{
-#ifdef __KERNEL__
- if(n > 0) schedule_timeout(n);
-#endif
-
-}
-
-
-static void nandemul2k_Read(void *buffer, int page, int start, int nBytes)
-{
- int pg = page%PAGES_PER_BLOCK;
- int blk = page/PAGES_PER_BLOCK;
- if(buffer && nBytes > 0)
- {
- memcpy(buffer,&ned.block[blk]->page[pg]->data[start],nBytes);
- }
-
-}
-
-static void nandemul2k_Program(const void *buffer, int page, int start, int nBytes)
-{
- int pg = page%PAGES_PER_BLOCK;
- int blk = page/PAGES_PER_BLOCK;
- __u8 *p;
- __u8 *b = (__u8 *)buffer;
-
- p = &ned.block[blk]->page[pg]->data[start];
-
- while(buffer && nBytes>0)
- {
- *p = *p & *b;
- p++;
- b++;
- nBytes--;
- }
-}
-
-static void nandemul2k_DoErase(int blockNumber)
-{
- int i;
-
- nandemul_Block *blk;
-
- if(blockNumber < 0 || blockNumber >= ned.nBlocks)
- {
- return;
- }
-
- blk = ned.block[blockNumber];
-
- for(i = 0; i < PAGES_PER_BLOCK; i++)
- {
- memset(blk->page[i],0xff,sizeof(nandemul_Page));
- blk->page[i]->empty = 1;
- }
- nandemul_yield(2);
-}
-
-
-static int nandemul2k_CalcNBlocks(void)
-{
- return EM_SIZE_IN_MEG * BLOCKS_PER_MEG;
-}
-
-
-
-static int CheckInit(void)
-{
- static int initialised = 0;
-
- int i,j;
-
- int fail = 0;
- int nBlocks;
-
- int nAllocated = 0;
-
- if(initialised)
- {
- return 0;
- }
-
-
- ned.nBlocks = nBlocks = nandemul2k_CalcNBlocks();
-
-
- ned.block = ALLOCATE(sizeof(nandemul_Block*) * nBlocks );
-
- if(!ned.block) return ENOMEM;
-
-
-
-
-
- for(i=fail=0; i <nBlocks; i++)
- {
-
- nandemul_Block *blk;
-
- if(!(blk = ned.block[i] = ALLOCATE(sizeof(nandemul_Block))))
- {
- fail = 1;
- }
- else
- {
- for(j = 0; j < PAGES_PER_BLOCK; j++)
- {
- if((blk->page[j] = ALLOCATE(sizeof(nandemul_Page))) == 0)
- {
- fail = 1;
- }
- }
- nandemul2k_DoErase(i);
- ned.block[i]->damaged = 0;
- nAllocated++;
- }
- }
-
- if(fail)
- {
- //Todo thump pages
-
- for(i = 0; i < nAllocated; i++)
- {
- FREE(ned.block[i]);
- }
- FREE(ned.block);
-
- return ENOMEM;
- }
-
- ned.nBlocks = nBlocks;
-
- initialised = 1;
-
- return 1;
-}
-
-
-
-static void nandemul2k_CleanUp(void)
-{
- int i,j;
-
- for(i = 0; i < ned.nBlocks; i++)
- {
- for(j = 0; j < PAGES_PER_BLOCK; j++)
- {
- FREE(ned.block[i]->page[j]);
- }
- FREE(ned.block[i]);
-
- }
- FREE(ned.block);
- ned.block = 0;
-}
-
-int nandemul2k_GetBytesPerChunk(void) { return PAGE_DATA_SIZE;}
-
-int nandemul2k_GetChunksPerBlock(void) { return PAGES_PER_BLOCK; }
-int nandemul2k_GetNumberOfBlocks(void) {return nandemul2k_CalcNBlocks();}
-
-
-
-static int nandemul2k_ReadId(__u8 *vendorId, __u8 *deviceId)
-{
- *vendorId = 'Y';
- *deviceId = '2';
-
- return 1;
-}
-
-
-static int nandemul2k_ReadStatus(__u8 *status)
-{
- *status = 0;
- return 1;
-}
-
-
-#ifdef CONFIG_MTD_NAND_ECC
-#include <linux/mtd/nand_ecc.h>
-#endif
-
-/*
- * NAND low-level MTD interface functions
- */
-static int nand_read (struct mtd_info *mtd, loff_t from, size_t len,
- size_t *retlen, u_char *buf);
-static int nand_read_ecc (struct mtd_info *mtd, loff_t from, size_t len,
- size_t *retlen, u_char *buf, u_char *oob_buf, struct nand_oobinfo *dummy);
-static int nand_read_oob (struct mtd_info *mtd, loff_t from, size_t len,
- size_t *retlen, u_char *buf);
-static int nand_write (struct mtd_info *mtd, loff_t to, size_t len,
- size_t *retlen, const u_char *buf);
-static int nand_write_ecc (struct mtd_info *mtd, loff_t to, size_t len,
- size_t *retlen, const u_char *buf,
- u_char *oob_buf, struct nand_oobinfo *dummy);
-static int nand_write_oob (struct mtd_info *mtd, loff_t to, size_t len,
- size_t *retlen, const u_char *buf);
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,7))
-static int nand_writev (struct mtd_info *mtd, const struct kvec *vecs,
- unsigned long count, loff_t to, size_t *retlen);
-#else
-static int nand_writev (struct mtd_info *mtd, const struct iovec *vecs,
- unsigned long count, loff_t to, size_t *retlen);
-#endif
-static int nand_erase (struct mtd_info *mtd, struct erase_info *instr);
-static void nand_sync (struct mtd_info *mtd);
-
-
-
-/*
- * NAND read
- */
-static int nand_read (struct mtd_info *mtd, loff_t from, size_t len,
- size_t *retlen, u_char *buf)
-{
- return nand_read_ecc (mtd, from, len, retlen, buf, NULL,NULL);
-}
-
-
-/*
- * NAND read with ECC
- */
-static int nand_read_ecc (struct mtd_info *mtd, loff_t from, size_t len,
- size_t *retlen, u_char *buf, u_char *oob_buf,struct nand_oobinfo *oobsel)
-{
- int start, page;
- int n = len;
- int nToCopy;
-
-
-
- /* Do not allow reads past end of device */
- if ((from + len) > mtd->size) {
- *retlen = 0;
- return -EINVAL;
- }
-
-
- /* Initialize return value */
- *retlen = 0;
-
- while(n > 0)
- {
-
- /* First we calculate the starting page */
- page = from >> NAND_SHIFT;
-
- /* Get raw starting column */
-
- start = from & (mtd->oobblock-1);
-
- // OK now check for the curveball where the start and end are in
- // the same page
- if((start + n) < mtd->oobblock)
- {
- nToCopy = n;
- }
- else
- {
- nToCopy = mtd->oobblock - start;
- }
-
- nandemul2k_Read(buf, page, start, nToCopy);
- nandemul2k_Read(oob_buf,page,PAGE_DATA_SIZE,PAGE_SPARE_SIZE);
-
- n -= nToCopy;
- from += nToCopy;
- buf += nToCopy;
- if(oob_buf) oob_buf += PAGE_SPARE_SIZE;
- *retlen += nToCopy;
-
- }
-
-
- return 0;
-}
-
-/*
- * NAND read out-of-band
- */
-static int nand_read_oob (struct mtd_info *mtd, loff_t from, size_t len,
- size_t *retlen, u_char *buf)
-{
- int col, page;
-
- T(0,("nand_read_oob: from = 0x%08x, buf = 0x%08x, len = %i\n", (unsigned int) from, (unsigned int) buf,
- (int) len));
-
- /* Shift to get page */
- page = ((int) from) >> NAND_SHIFT;
-
- /* Mask to get column */
- col = from & 0x0f;
-
- /* Initialize return length value */
- *retlen = 0;
-
- /* Do not allow reads past end of device */
- if ((from + len) > mtd->size) {
- T(0,
- ("nand_read_oob: Attempt read beyond end of device\n"));
- *retlen = 0;
- return -EINVAL;
- }
-
- nandemul2k_Read(buf,page,PAGE_DATA_SIZE + col,len);
-
- /* Return happy */
- *retlen = len;
- return 0;
-}
-
-/*
- * NAND write
- */
-static int nand_write (struct mtd_info *mtd, loff_t to, size_t len,
- size_t *retlen, const u_char *buf)
-{
- return nand_write_ecc (mtd, to, len, retlen, buf, NULL,NULL);
-}
-
-/*
- * NAND write with ECC
- */
-static int nand_write_ecc (struct mtd_info *mtd, loff_t to, size_t len,
- size_t *retlen, const u_char *buf,
- u_char *oob_buf, struct nand_oobinfo *dummy)
-{
-
- int start, page;
- int n = len;
- int nToCopy;
-
-
-
- /* Do not allow reads past end of device */
- if ((to + len) > mtd->size) {
- *retlen = 0;
- return -EINVAL;
- }
-
-
- /* Initialize return value */
- *retlen = 0;
-
- while(n > 0)
- {
-
- /* First we calculate the starting page */
- page = to >> NAND_SHIFT;
-
- /* Get raw starting column */
-
- start = to & (mtd->oobblock - 1);
-
- // OK now check for the curveball where the start and end are in
- // the same page
- if((start + n) < mtd->oobblock)
- {
- nToCopy = n;
- }
- else
- {
- nToCopy = mtd->oobblock - start;
- }
-
- nandemul2k_Program(buf, page, start, nToCopy);
- nandemul2k_Program(oob_buf, page, PAGE_DATA_SIZE, PAGE_SPARE_SIZE);
-
- n -= nToCopy;
- to += nToCopy;
- buf += nToCopy;
- if(oob_buf) oob_buf += PAGE_SPARE_SIZE;
- *retlen += nToCopy;
-
- }
-
-
- return 0;
-}
-
-/*
- * NAND write out-of-band
- */
-static int nand_write_oob (struct mtd_info *mtd, loff_t to, size_t len,
- size_t *retlen, const u_char *buf)
-{
- int col, page;
-
-
- T(0,(
- "nand_read_oob: to = 0x%08x, len = %i\n", (unsigned int) to,
- (int) len));
-
- /* Shift to get page */
- page = ((int) to) >> NAND_SHIFT;
-
- /* Mask to get column */
- col = to & 0x0f;
-
- /* Initialize return length value */
- *retlen = 0;
-
- /* Do not allow reads past end of device */
- if ((to + len) > mtd->size) {
- T(0,(
- "nand_read_oob: Attempt read beyond end of device\n"));
- *retlen = 0;
- return -EINVAL;
- }
-
- nandemul2k_Program(buf,page,512 + col,len);
-
- /* Return happy */
- *retlen = len;
- return 0;
-
-}
-
-/*
- * NAND write with iovec
- */
-#if (LINUX_VERSION_CODE > KERNEL_VERSION(2,6,7))
-static int nand_writev (struct mtd_info *mtd, const struct kvec *vecs,
- unsigned long count, loff_t to, size_t *retlen)
-#else
-static int nand_writev (struct mtd_info *mtd, const struct iovec *vecs,
- unsigned long count, loff_t to, size_t *retlen)
-#endif
-{
- return -EINVAL;
-}
-
-/*
- * NAND erase a block
- */
-static int nand_erase (struct mtd_info *mtd, struct erase_info *instr)
-{
- int i, nBlocks,block;
-
- T(0,(
- "nand_erase: start = 0x%08x, len = %i\n",
- (unsigned int) instr->addr, (unsigned int) instr->len));
-
- /* Start address must align on block boundary */
- if (instr->addr & (mtd->erasesize - 1)) {
- T(0,(
- "nand_erase: Unaligned address\n"));
- return -EINVAL;
- }
-
- /* Length must align on block boundary */
- if (instr->len & (mtd->erasesize - 1)) {
- T(0,(
- "nand_erase: Length not block aligned\n"));
- return -EINVAL;
- }
-
- /* Do not allow erase past end of device */
- if ((instr->len + instr->addr) > mtd->size) {
- T(0,(
- "nand_erase: Erase past end of device\n"));
- return -EINVAL;
- }
-
- nBlocks = instr->len >> (NAND_SHIFT + BLK_SHIFT);
- block = instr->addr >> (NAND_SHIFT + BLK_SHIFT);
-
- for(i = 0; i < nBlocks; i++)
- {
- nandemul2k_DoErase(block);
- block++;
- }
-
- instr->state = MTD_ERASE_DONE;  * change state to ERASE_DONE */
-
- instr->callback(instr);  * wake up */
-
- return 0;
-
-
-}
-
-
-static int nand_block_isbad(struct mtd_info *mtd, loff_t ofs)
-{
- return 0;
-}
-
-static int nand_block_markbad(struct mtd_info *mtd, loff_t ofs)
-{
- return 0;
-}
-
-
-/*
- * NAND sync
- */
-static void nand_sync (struct mtd_info *mtd)
-{
- T(0,("nand_sync: called\n"));
-
-}
-
-/*
- * Scan for the NAND device
- */
-static int nandemul2k_scan (struct mtd_info *mtd,int nchips)
-{
- mtd->oobblock = PAGE_DATA_SIZE;
- mtd->oobsize = PAGE_SPARE_SIZE;
- mtd->erasesize = PAGE_DATA_SIZE * PAGES_PER_BLOCK;
- mtd->size = sizeInMB * 1024*1024;
-
-
-
- /* Fill in remaining MTD driver data */
- mtd->type = MTD_NANDFLASH;
- mtd->flags = MTD_CAP_NANDFLASH;
- mtd->owner = THIS_MODULE;
- mtd->ecctype = MTD_ECC_NONE;
- mtd->erase = nand_erase;
- mtd->point = NULL;
- mtd->unpoint = NULL;
- mtd->read = nand_read;
- mtd->write = nand_write;
- mtd->read_ecc = nand_read_ecc;
- mtd->write_ecc = nand_write_ecc;
- mtd->read_oob = nand_read_oob;
- mtd->write_oob = nand_write_oob;
- mtd->block_isbad = nand_block_isbad;
- mtd->block_markbad = nand_block_markbad;
- mtd->readv = NULL;
- mtd->writev = nand_writev;
- mtd->sync = nand_sync;
- mtd->lock = NULL;
- mtd->unlock = NULL;
- mtd->suspend = NULL;
- mtd->resume = NULL;
-
- mtd->name = "NANDemul2k";
-
- /* Return happy */
- return 0;
-}
-
-#if 0
-#ifdef MODULE
-MODULE_PARM(sizeInMB, "i");
-
-__setup("sizeInMB=",sizeInMB);
-#endif
-#endif
-
-/*
- * Define partitions for flash devices
- */
-
-static struct mtd_partition nandemul2k_partition[] =
-{
- { .name = "NANDemul partition 1",
- .offset = 0,
- .size = 0 },
-};
-
-static int nPartitions = sizeof(nandemul2k_partition)/sizeof(nandemul2k_partition[0]);
-
-/*
- * Main initialization routine
- */
-int __init nandemul2k_init (void)
-{
-
- // Do the nand init
-
- CheckInit();
-
- nandemul2k_scan(&nandemul2k_mtd,1);
-
- // Build the partition table
-
- nandemul2k_partition[0].size = sizeInMB * 1024 * 1024;
-
- // Register the partition
- add_mtd_partitions(&nandemul2k_mtd,nandemul2k_partition,nPartitions);
-
- return 0;
-
-}
-
-module_init(nandemul2k_init);
-
-/*
- * Clean up routine
- */
-#ifdef MODULE
-static void __exit nandemul2k_cleanup (void)
-{
-
- nandemul2k_CleanUp();
-
- /* Unregister partitions */
- del_mtd_partitions(&nandemul2k_mtd);
-
- /* Unregister the device */
- del_mtd_device (&nandemul2k_mtd);
-
-}
-module_exit(nandemul2k_cleanup);
-#endif
-
-MODULE_LICENSE("GPL");
-MODULE_AUTHOR("Charles Manning <manningc@aleph1.co.uk>");
-MODULE_DESCRIPTION("2k Page/128k Block NAND emulated in RAM");
-
-
-
-
generated by cgit v1.1 at 2024-11-25 00:22:55 +0000