1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Copyright © 2009 - Maxim Levitsky
4 * SmartMedia/xD translation layer
5 *
6 * Based loosly on ssfdc.c which is
7 * © 2005 Eptar srl
8 * Author: Claudio Lanconelli <lanconelli.claudio@eptar.com>
9 */
10
11#include <linux/mtd/blktrans.h>
12#include <linux/kfifo.h>
13#include <linux/sched.h>
14#include <linux/completion.h>
15#include <linux/mtd/mtd.h>
16
17
18
19struct ftl_zone {
20 bool initialized;
21 int16_t *lba_to_phys_table; /* LBA to physical table */
22 struct kfifo free_sectors; /* queue of free sectors */
23};
24
25struct sm_ftl {
26 struct mtd_blktrans_dev *trans;
27
28 struct mutex mutex; /* protects the structure */
29 struct ftl_zone *zones; /* FTL tables for each zone */
30
31 /* Media information */
32 int block_size; /* block size in bytes */
33 int zone_size; /* zone size in blocks */
34 int zone_count; /* number of zones */
35 int max_lba; /* maximum lba in a zone */
36 int smallpagenand; /* 256 bytes/page nand */
37 bool readonly; /* is FS readonly */
38 bool unstable;
39 int cis_block; /* CIS block location */
40 int cis_boffset; /* CIS offset in the block */
41 int cis_page_offset; /* CIS offset in the page */
42 void *cis_buffer; /* tmp buffer for cis reads */
43
44 /* Cache */
45 int cache_block; /* block number of cached block */
46 int cache_zone; /* zone of cached block */
47 unsigned char *cache_data; /* cached block data */
48 long unsigned int cache_data_invalid_bitmap;
49 bool cache_clean;
50 struct work_struct flush_work;
51 struct timer_list timer;
52
53 /* Geometry stuff */
54 int heads;
55 int sectors;
56 int cylinders;
57
58 struct attribute_group *disk_attributes;
59};
60
61struct chs_entry {
62 unsigned long size;
63 unsigned short cyl;
64 unsigned char head;
65 unsigned char sec;
66};
67
68
69#define SM_FTL_PARTN_BITS 3
70
71#define sm_printk(format, ...) \
72 printk(KERN_WARNING "sm_ftl" ": " format "\n", ## __VA_ARGS__)
73
74#define dbg(format, ...) \
75 if (debug) \
76 printk(KERN_DEBUG "sm_ftl" ": " format "\n", ## __VA_ARGS__)
77
78#define dbg_verbose(format, ...) \
79 if (debug > 1) \
80 printk(KERN_DEBUG "sm_ftl" ": " format "\n", ## __VA_ARGS__)
81
82
83static int sm_erase_block(struct sm_ftl *ftl, int zone_num, uint16_t block,
84 int put_free);
85static void sm_mark_block_bad(struct sm_ftl *ftl, int zone_num, int block);
86
87static int sm_recheck_media(struct sm_ftl *ftl);
88

source code of linux/drivers/mtd/sm_ftl.h