From b37bde147890c8fea8369a5a4e230dabdea4ebfb Mon Sep 17 00:00:00 2001 From: Bryan Wu Date: Tue, 2 Oct 2007 13:56:05 -0700 Subject: [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 Signed-off-by: Andrew Morton Signed-off-by: David Woodhouse --- include/asm-blackfin/nand.h | 47 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 47 insertions(+) create mode 100644 include/asm-blackfin/nand.h (limited to 'include/asm-blackfin/nand.h') diff --git a/include/asm-blackfin/nand.h b/include/asm-blackfin/nand.h new file mode 100644 index 00000000000..afbaafa793f --- /dev/null +++ b/include/asm-blackfin/nand.h @@ -0,0 +1,47 @@ +/* linux/include/asm-blackfin/nand.h + * + * Copyright (c) 2007 Analog Devices, Inc. + * Bryan Wu + * + * 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; +}; -- cgit v1.2.3