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authorMaxim Levitsky <maximlevitsky@gmail.com>2010-02-22 21:39:41 +0300
committerDavid Woodhouse <David.Woodhouse@intel.com>2010-02-26 22:06:50 +0300
commit7d17c02a01a111f40986859f044c8c4cce8a4aa6 (patch)
treeb9fec0a8ad3073e3d7ca442fc1db17b054974e66 /drivers/mtd/sm_ftl.h
parenta7790532f5b7358c33a6b1834dc2b318de209f31 (diff)
downloadlinux-7d17c02a01a111f40986859f044c8c4cce8a4aa6.tar.xz
mtd: Add new SmartMedia/xD FTL
This implements new readwrite SmartMedia/xd FTL. mtd driver must have support proper ECC and badblock verification based on oob parts for 512 bytes nand. Also mtd driver must define read_oob and write_oob, which are used to read and write both data and oob together. Signed-off-by: Maxim Levitsky <maximlevitsky@gmail.com> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
Diffstat (limited to 'drivers/mtd/sm_ftl.h')
-rw-r--r--drivers/mtd/sm_ftl.h94
1 files changed, 94 insertions, 0 deletions
diff --git a/drivers/mtd/sm_ftl.h b/drivers/mtd/sm_ftl.h
new file mode 100644
index 000000000000..e30e48e7f63d
--- /dev/null
+++ b/drivers/mtd/sm_ftl.h
@@ -0,0 +1,94 @@
+/*
+ * 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>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#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 {
+ int 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 */
+ int readonly; /* is FS readonly */
+ int 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;
+ int cache_clean;
+ struct work_struct flush_work;
+ struct timer_list timer;
+
+ /* Async erase stuff */
+ struct completion erase_completion;
+
+ /* 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 void sm_erase_callback(struct erase_info *self);
+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);