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
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*
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* Copyright (c) 2007 Analog Devices, Inc.
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* Bryan Wu <bryan.wu@analog.com>
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*
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* BF5XX - NAND flash controller platfrom_device info
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License version 2 as
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* published by the Free Software Foundation.
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*/
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/* struct bf5xx_nand_platform
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*
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* define a interface between platfrom board specific code and
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* bf54x NFC driver.
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*
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* nr_partitions = number of partitions pointed to be partitoons (or zero)
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* partitions = mtd partition list
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*/
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#define NFC_PG_SIZE_256 0
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#define NFC_PG_SIZE_512 1
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#define NFC_PG_SIZE_OFFSET 9
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#define NFC_NWIDTH_8 0
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#define NFC_NWIDTH_16 1
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#define NFC_NWIDTH_OFFSET 8
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#define NFC_RDDLY_OFFSET 4
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#define NFC_WRDLY_OFFSET 0
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#define NFC_STAT_NBUSY 1
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struct bf5xx_nand_platform {
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/* NAND chip information */
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unsigned short page_size;
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unsigned short data_width;
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/* RD/WR strobe delay timing information, all times in SCLK cycles */
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unsigned short rd_dly;
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unsigned short wr_dly;
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/* NAND MTD partition information */
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int nr_partitions;
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struct mtd_partition *partitions;
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};
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