/*
   * Copyright © 2009 - Maxim Levitsky
   * SmartMedia/xD translation layer
   *
   * Based loosly on ssfdc.c which is
   *  © 2005 Eptar srl
   *  Author: Claudio Lanconelli <lanconelli.claudio@eptar.com>
   *
   * 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/mtd/blktrans.h>
  #include <linux/kfifo.h>
  #include <linux/sched.h>
  #include <linux/completion.h>
  #include <linux/mtd/mtd.h>
  
  
  
  struct ftl_zone {

  	bool initialized;

  	int16_t *lba_to_phys_table;		/* LBA to physical table */
  	struct kfifo free_sectors;	/* queue of free sectors */
  };
  
  struct sm_ftl {
  	struct mtd_blktrans_dev *trans;
  
  	struct mutex mutex;		/* protects the structure */
  	struct ftl_zone *zones;		/* FTL tables for each zone */
  
  	/* Media information */
  	int block_size;			/* block size in bytes */
  	int zone_size;			/* zone size in blocks */
  	int zone_count;			/* number of zones */
  	int max_lba;			/* maximum lba in a zone */
  	int smallpagenand;		/* 256 bytes/page nand */

  	bool readonly;			/* is FS readonly */
  	bool unstable;

  	int cis_block;			/* CIS block location */
  	int cis_boffset;		/* CIS offset in the block */
  	int cis_page_offset;		/* CIS offset in the page */
  	void *cis_buffer;		/* tmp buffer for cis reads */
  
  	/* Cache */
  	int cache_block;		/* block number of cached block */
  	int cache_zone;			/* zone of cached block */
  	unsigned char *cache_data;	/* cached block data */
  	long unsigned int cache_data_invalid_bitmap;

  	bool cache_clean;

  	struct work_struct flush_work;
  	struct timer_list timer;
  
  	/* Async erase stuff */
  	struct completion erase_completion;
  
  	/* Geometry stuff */
  	int heads;
  	int sectors;
  	int cylinders;
  
  	struct attribute_group *disk_attributes;
  };
  
  struct chs_entry {
  	unsigned long size;
  	unsigned short cyl;
  	unsigned char head;
  	unsigned char sec;
  };
  
  
  #define SM_FTL_PARTN_BITS	3
  
  #define sm_printk(format, ...) \
  	printk(KERN_WARNING "sm_ftl" ": " format "
  ", ## __VA_ARGS__)
  
  #define dbg(format, ...) \
  	if (debug) \
  		printk(KERN_DEBUG "sm_ftl" ": " format "
  ", ## __VA_ARGS__)
  
  #define dbg_verbose(format, ...) \
  	if (debug > 1) \
  		printk(KERN_DEBUG "sm_ftl" ": " format "
  ", ## __VA_ARGS__)
  
  
  static void sm_erase_callback(struct erase_info *self);
  static int sm_erase_block(struct sm_ftl *ftl, int zone_num, uint16_t block,
  								int put_free);
  static void sm_mark_block_bad(struct sm_ftl *ftl, int zone_num, int block);
  
  static int sm_recheck_media(struct sm_ftl *ftl);