/* SPDX-License-Identifier: GPL-2.0-only */
/*
 * 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>
 */

#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;

        /* 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 "\n", ## __VA_ARGS__)

#define dbg(format, ...) \
        if (debug) \
                printk(KERN_DEBUG "sm_ftl" ": " format "\n", ## __VA_ARGS__)

#define dbg_verbose(format, ...) \
        if (debug > 1) \
                printk(KERN_DEBUG "sm_ftl" ": " format "\n", ## __VA_ARGS__)


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);