mirror of
https://github.com/edk2-porting/linux-next.git
synced 2024-12-21 03:33:59 +08:00
b37bde1478
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>
48 lines
1.2 KiB
C
48 lines
1.2 KiB
C
/* linux/include/asm-blackfin/nand.h
|
|
*
|
|
* Copyright (c) 2007 Analog Devices, Inc.
|
|
* Bryan Wu <bryan.wu@analog.com>
|
|
*
|
|
* BF5XX - NAND flash controller platfrom_device info
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
/* struct bf5xx_nand_platform
|
|
*
|
|
* define a interface between platfrom board specific code and
|
|
* bf54x NFC driver.
|
|
*
|
|
* nr_partitions = number of partitions pointed to be partitoons (or zero)
|
|
* partitions = mtd partition list
|
|
*/
|
|
|
|
#define NFC_PG_SIZE_256 0
|
|
#define NFC_PG_SIZE_512 1
|
|
#define NFC_PG_SIZE_OFFSET 9
|
|
|
|
#define NFC_NWIDTH_8 0
|
|
#define NFC_NWIDTH_16 1
|
|
#define NFC_NWIDTH_OFFSET 8
|
|
|
|
#define NFC_RDDLY_OFFSET 4
|
|
#define NFC_WRDLY_OFFSET 0
|
|
|
|
#define NFC_STAT_NBUSY 1
|
|
|
|
struct bf5xx_nand_platform {
|
|
/* NAND chip information */
|
|
unsigned short page_size;
|
|
unsigned short data_width;
|
|
|
|
/* RD/WR strobe delay timing information, all times in SCLK cycles */
|
|
unsigned short rd_dly;
|
|
unsigned short wr_dly;
|
|
|
|
/* NAND MTD partition information */
|
|
int nr_partitions;
|
|
struct mtd_partition *partitions;
|
|
};
|