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authorBryan Wu <bryan.wu@analog.com>2007-10-02 16:56:05 -0400
committerDavid Woodhouse <dwmw2@infradead.org>2007-10-13 09:36:49 -0400
commitb37bde147890c8fea8369a5a4e230dabdea4ebfb (patch)
treeb447c6b44d7c5b48ead3366db74654c7cc64a4d6 /include/asm-blackfin
parentc4a9f88daf6c382fedde4cdddef0b30f1d0a20db (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.h1
-rw-r--r--include/asm-blackfin/nand.h47
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
35struct 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};