1/*
2 * Copyright © 2009 - Maxim Levitsky
3 * SmartMedia/xD translation layer
4 *
5 * Based loosly on ssfdc.c which is
6 *  © 2005 Eptar srl
7 *  Author: Claudio Lanconelli <lanconelli.claudio@eptar.com>
8 *
9 * This program is free software; you can redistribute it and/or modify
10 * it under the terms of the GNU General Public License version 2 as
11 * published by the Free Software Foundation.
12 */
13
14#include <linux/mtd/blktrans.h>
15#include <linux/kfifo.h>
16#include <linux/sched.h>
17#include <linux/completion.h>
18#include <linux/mtd/mtd.h>
19
20
21
22struct ftl_zone {
23	bool initialized;
24	int16_t *lba_to_phys_table;		/* LBA to physical table */
25	struct kfifo free_sectors;	/* queue of free sectors */
26};
27
28struct sm_ftl {
29	struct mtd_blktrans_dev *trans;
30
31	struct mutex mutex;		/* protects the structure */
32	struct ftl_zone *zones;		/* FTL tables for each zone */
33
34	/* Media information */
35	int block_size;			/* block size in bytes */
36	int zone_size;			/* zone size in blocks */
37	int zone_count;			/* number of zones */
38	int max_lba;			/* maximum lba in a zone */
39	int smallpagenand;		/* 256 bytes/page nand */
40	bool readonly;			/* is FS readonly */
41	bool unstable;
42	int cis_block;			/* CIS block location */
43	int cis_boffset;		/* CIS offset in the block */
44	int cis_page_offset;		/* CIS offset in the page */
45	void *cis_buffer;		/* tmp buffer for cis reads */
46
47	/* Cache */
48	int cache_block;		/* block number of cached block */
49	int cache_zone;			/* zone of cached block */
50	unsigned char *cache_data;	/* cached block data */
51	long unsigned int cache_data_invalid_bitmap;
52	bool cache_clean;
53	struct work_struct flush_work;
54	struct timer_list timer;
55
56	/* Async erase stuff */
57	struct completion erase_completion;
58
59	/* Geometry stuff */
60	int heads;
61	int sectors;
62	int cylinders;
63
64	struct attribute_group *disk_attributes;
65};
66
67struct chs_entry {
68	unsigned long size;
69	unsigned short cyl;
70	unsigned char head;
71	unsigned char sec;
72};
73
74
75#define SM_FTL_PARTN_BITS	3
76
77#define sm_printk(format, ...) \
78	printk(KERN_WARNING "sm_ftl" ": " format "\n", ## __VA_ARGS__)
79
80#define dbg(format, ...) \
81	if (debug) \
82		printk(KERN_DEBUG "sm_ftl" ": " format "\n", ## __VA_ARGS__)
83
84#define dbg_verbose(format, ...) \
85	if (debug > 1) \
86		printk(KERN_DEBUG "sm_ftl" ": " format "\n", ## __VA_ARGS__)
87
88
89static void sm_erase_callback(struct erase_info *self);
90static int sm_erase_block(struct sm_ftl *ftl, int zone_num, uint16_t block,
91								int put_free);
92static void sm_mark_block_bad(struct sm_ftl *ftl, int zone_num, int block);
93
94static int sm_recheck_media(struct sm_ftl *ftl);
95