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 22 struct 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 28 struct 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 /* Geometry stuff */ 57 int heads; 58 int sectors; 59 int cylinders; 60 61 struct attribute_group *disk_attributes; 62 }; 63 64 struct chs_entry { 65 unsigned long size; 66 unsigned short cyl; 67 unsigned char head; 68 unsigned char sec; 69 }; 70 71 72 #define SM_FTL_PARTN_BITS 3 73 74 #define sm_printk(format, ...) \ 75 printk(KERN_WARNING "sm_ftl" ": " format "\n", ## __VA_ARGS__) 76 77 #define dbg(format, ...) \ 78 if (debug) \ 79 printk(KERN_DEBUG "sm_ftl" ": " format "\n", ## __VA_ARGS__) 80 81 #define dbg_verbose(format, ...) \ 82 if (debug > 1) \ 83 printk(KERN_DEBUG "sm_ftl" ": " format "\n", ## __VA_ARGS__) 84 85 86 static int sm_erase_block(struct sm_ftl *ftl, int zone_num, uint16_t block, 87 int put_free); 88 static void sm_mark_block_bad(struct sm_ftl *ftl, int zone_num, int block); 89 90 static int sm_recheck_media(struct sm_ftl *ftl); 91