diff options
author | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 12:17:53 -0700 |
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committer | Yunhong Jiang <yunhong.jiang@intel.com> | 2015-08-04 15:44:42 -0700 |
commit | 9ca8dbcc65cfc63d6f5ef3312a33184e1d726e00 (patch) | |
tree | 1c9cafbcd35f783a87880a10f85d1a060db1a563 /kernel/drivers/mtd/nand/sm_common.h | |
parent | 98260f3884f4a202f9ca5eabed40b1354c489b29 (diff) |
Add the rt linux 4.1.3-rt3 as base
Import the rt linux 4.1.3-rt3 as OPNFV kvm base.
It's from git://git.kernel.org/pub/scm/linux/kernel/git/rt/linux-rt-devel.git linux-4.1.y-rt and
the base is:
commit 0917f823c59692d751951bf5ea699a2d1e2f26a2
Author: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
Date: Sat Jul 25 12:13:34 2015 +0200
Prepare v4.1.3-rt3
Signed-off-by: Sebastian Andrzej Siewior <bigeasy@linutronix.de>
We lose all the git history this way and it's not good. We
should apply another opnfv project repo in future.
Change-Id: I87543d81c9df70d99c5001fbdf646b202c19f423
Signed-off-by: Yunhong Jiang <yunhong.jiang@intel.com>
Diffstat (limited to 'kernel/drivers/mtd/nand/sm_common.h')
-rw-r--r-- | kernel/drivers/mtd/nand/sm_common.h | 61 |
1 files changed, 61 insertions, 0 deletions
diff --git a/kernel/drivers/mtd/nand/sm_common.h b/kernel/drivers/mtd/nand/sm_common.h new file mode 100644 index 000000000..d3e028e58 --- /dev/null +++ b/kernel/drivers/mtd/nand/sm_common.h @@ -0,0 +1,61 @@ +/* + * Copyright © 2009 - Maxim Levitsky + * Common routines & support for SmartMedia/xD format + * + * 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/bitops.h> +#include <linux/mtd/mtd.h> + +/* Full oob structure as written on the flash */ +struct sm_oob { + uint32_t reserved; + uint8_t data_status; + uint8_t block_status; + uint8_t lba_copy1[2]; + uint8_t ecc2[3]; + uint8_t lba_copy2[2]; + uint8_t ecc1[3]; +} __packed; + + +/* one sector is always 512 bytes, but it can consist of two nand pages */ +#define SM_SECTOR_SIZE 512 + +/* oob area is also 16 bytes, but might be from two pages */ +#define SM_OOB_SIZE 16 + +/* This is maximum zone size, and all devices that have more that one zone + have this size */ +#define SM_MAX_ZONE_SIZE 1024 + +/* support for small page nand */ +#define SM_SMALL_PAGE 256 +#define SM_SMALL_OOB_SIZE 8 + + +extern int sm_register_device(struct mtd_info *mtd, int smartmedia); + + +static inline int sm_sector_valid(struct sm_oob *oob) +{ + return hweight16(oob->data_status) >= 5; +} + +static inline int sm_block_valid(struct sm_oob *oob) +{ + return hweight16(oob->block_status) >= 7; +} + +static inline int sm_block_erased(struct sm_oob *oob) +{ + static const uint32_t erased_pattern[4] = { + 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF, 0xFFFFFFFF }; + + /* First test for erased block */ + if (!memcmp(oob, erased_pattern, sizeof(*oob))) + return 1; + return 0; +} |