7d17c02a01
This implements new readwrite SmartMedia/xd FTL. mtd driver must have support proper ECC and badblock verification based on oob parts for 512 bytes nand. Also mtd driver must define read_oob and write_oob, which are used to read and write both data and oob together. Signed-off-by: Maxim Levitsky <maximlevitsky@gmail.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
94 lines
2.5 KiB
C
94 lines
2.5 KiB
C
/*
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* Copyright © 2009 - Maxim Levitsky
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* SmartMedia/xD translation layer
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*
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* Based loosly on ssfdc.c which is
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* © 2005 Eptar srl
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* Author: Claudio Lanconelli <lanconelli.claudio@eptar.com>
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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/mtd/blktrans.h>
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#include <linux/kfifo.h>
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#include <linux/sched.h>
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#include <linux/completion.h>
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#include <linux/mtd/mtd.h>
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struct ftl_zone {
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int initialized;
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int16_t *lba_to_phys_table; /* LBA to physical table */
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struct kfifo free_sectors; /* queue of free sectors */
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};
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struct sm_ftl {
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struct mtd_blktrans_dev *trans;
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struct mutex mutex; /* protects the structure */
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struct ftl_zone *zones; /* FTL tables for each zone */
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/* Media information */
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int block_size; /* block size in bytes */
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int zone_size; /* zone size in blocks */
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int zone_count; /* number of zones */
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int max_lba; /* maximum lba in a zone */
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int smallpagenand; /* 256 bytes/page nand */
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int readonly; /* is FS readonly */
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int unstable;
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int cis_block; /* CIS block location */
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int cis_boffset; /* CIS offset in the block */
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int cis_page_offset; /* CIS offset in the page */
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void *cis_buffer; /* tmp buffer for cis reads */
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/* Cache */
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int cache_block; /* block number of cached block */
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int cache_zone; /* zone of cached block */
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unsigned char *cache_data; /* cached block data */
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long unsigned int cache_data_invalid_bitmap;
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int cache_clean;
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struct work_struct flush_work;
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struct timer_list timer;
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/* Async erase stuff */
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struct completion erase_completion;
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/* Geometry stuff */
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int heads;
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int sectors;
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int cylinders;
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struct attribute_group *disk_attributes;
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};
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struct chs_entry {
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unsigned long size;
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unsigned short cyl;
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unsigned char head;
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unsigned char sec;
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};
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#define SM_FTL_PARTN_BITS 3
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#define sm_printk(format, ...) \
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printk(KERN_WARNING "sm_ftl" ": " format "\n", ## __VA_ARGS__)
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#define dbg(format, ...) \
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if (debug) \
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printk(KERN_DEBUG "sm_ftl" ": " format "\n", ## __VA_ARGS__)
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#define dbg_verbose(format, ...) \
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if (debug > 1) \
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printk(KERN_DEBUG "sm_ftl" ": " format "\n", ## __VA_ARGS__)
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static void sm_erase_callback(struct erase_info *self);
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static int sm_erase_block(struct sm_ftl *ftl, int zone_num, uint16_t block,
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int put_free);
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static void sm_mark_block_bad(struct sm_ftl *ftl, int zone_num, int block);
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static int sm_recheck_media(struct sm_ftl *ftl);
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