diff options
author | Bryan Wu <bryan.wu@analog.com> | 2007-10-02 16:56:05 -0400 |
---|---|---|
committer | David Woodhouse <dwmw2@infradead.org> | 2007-10-13 09:36:49 -0400 |
commit | b37bde147890c8fea8369a5a4e230dabdea4ebfb (patch) | |
tree | b447c6b44d7c5b48ead3366db74654c7cc64a4d6 /include/asm-blackfin | |
parent | c4a9f88daf6c382fedde4cdddef0b30f1d0a20db (diff) |
[MTD] [NAND] Blackfin on-chip NAND Flash Controller driver
This is the driver for latest Blackfin on-chip nand flash controller
- use nand_chip and mtd_info common nand driver interface
- provide both PIO and dma operation
- compiled with ezkit bf548 configuration
- use hardware 1-bit ECC
- tested with YAFFS2 and can mount YAFFS2 filesystem as rootfs
ChangeLog from try#1
- use hweight32() instead of count_bits()
- replace bf54x with bf5xx and BF54X with BF5XX
- compare against plat->page_size in 2 cases when enable hardware ECC
ChangeLog from try#2
- passed nand_test suites
- use cpu_relax() instead of busy wait loop
- some coding style issue pointed out by Andrew
Signed-off-by: Bryan Wu <bryan.wu@analog.com>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Diffstat (limited to 'include/asm-blackfin')
-rw-r--r-- | include/asm-blackfin/mach-bf548/dma.h | 1 | ||||
-rw-r--r-- | include/asm-blackfin/nand.h | 47 |
2 files changed, 48 insertions, 0 deletions
diff --git a/include/asm-blackfin/mach-bf548/dma.h b/include/asm-blackfin/mach-bf548/dma.h index fcc8b4c34c6a..14cb10cc24ae 100644 --- a/include/asm-blackfin/mach-bf548/dma.h +++ b/include/asm-blackfin/mach-bf548/dma.h | |||
@@ -55,6 +55,7 @@ | |||
55 | #define CH_SPORT3_RX 20 | 55 | #define CH_SPORT3_RX 20 |
56 | #define CH_SPORT3_TX 21 | 56 | #define CH_SPORT3_TX 21 |
57 | #define CH_SDH 22 | 57 | #define CH_SDH 22 |
58 | #define CH_NFC 22 | ||
58 | #define CH_SPI2 23 | 59 | #define CH_SPI2 23 |
59 | 60 | ||
60 | #define CH_MEM_STREAM0_DEST 24 | 61 | #define CH_MEM_STREAM0_DEST 24 |
diff --git a/include/asm-blackfin/nand.h b/include/asm-blackfin/nand.h new file mode 100644 index 000000000000..afbaafa793f1 --- /dev/null +++ b/include/asm-blackfin/nand.h | |||
@@ -0,0 +1,47 @@ | |||
1 | /* linux/include/asm-blackfin/nand.h | ||
2 | * | ||
3 | * Copyright (c) 2007 Analog Devices, Inc. | ||
4 | * Bryan Wu <bryan.wu@analog.com> | ||
5 | * | ||
6 | * BF5XX - NAND flash controller platfrom_device info | ||
7 | * | ||
8 | * This program is free software; you can redistribute it and/or modify | ||
9 | * it under the terms of the GNU General Public License version 2 as | ||
10 | * published by the Free Software Foundation. | ||
11 | */ | ||
12 | |||
13 | /* struct bf5xx_nand_platform | ||
14 | * | ||
15 | * define a interface between platfrom board specific code and | ||
16 | * bf54x NFC driver. | ||
17 | * | ||
18 | * nr_partitions = number of partitions pointed to be partitoons (or zero) | ||
19 | * partitions = mtd partition list | ||
20 | */ | ||
21 | |||
22 | #define NFC_PG_SIZE_256 0 | ||
23 | #define NFC_PG_SIZE_512 1 | ||
24 | #define NFC_PG_SIZE_OFFSET 9 | ||
25 | |||
26 | #define NFC_NWIDTH_8 0 | ||
27 | #define NFC_NWIDTH_16 1 | ||
28 | #define NFC_NWIDTH_OFFSET 8 | ||
29 | |||
30 | #define NFC_RDDLY_OFFSET 4 | ||
31 | #define NFC_WRDLY_OFFSET 0 | ||
32 | |||
33 | #define NFC_STAT_NBUSY 1 | ||
34 | |||
35 | struct bf5xx_nand_platform { | ||
36 | /* NAND chip information */ | ||
37 | unsigned short page_size; | ||
38 | unsigned short data_width; | ||
39 | |||
40 | /* RD/WR strobe delay timing information, all times in SCLK cycles */ | ||
41 | unsigned short rd_dly; | ||
42 | unsigned short wr_dly; | ||
43 | |||
44 | /* NAND MTD partition information */ | ||
45 | int nr_partitions; | ||
46 | struct mtd_partition *partitions; | ||
47 | }; | ||