projects / linux.git / blame
| Commit | Line | Data |
|---|---|---|
| 7d17c02a ML |
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 <[email protected]> | |
| 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 | int 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 | int readonly; /* is FS readonly */ | |
| 41 | int 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 | int 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 | ||
| 67 | struct 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 | ||
| 89 | static void sm_erase_callback(struct erase_info *self); | |
| 90 | static int sm_erase_block(struct sm_ftl *ftl, int zone_num, uint16_t block, | |
| 91 | int put_free); | |
| 92 | static void sm_mark_block_bad(struct sm_ftl *ftl, int zone_num, int block); | |
| 93 | ||
| 94 | static int sm_recheck_media(struct sm_ftl *ftl); |