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authorBryan Wu <bryan.wu@analog.com>2007-10-02 13:56:05 -0700
committerDavid Woodhouse <dwmw2@infradead.org>2007-10-13 14:36:49 +0100
commitb37bde147890c8fea8369a5a4e230dabdea4ebfb (patch)
treeb447c6b44d7c5b48ead3366db74654c7cc64a4d6 /include/asm-blackfin/nand.h
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/nand.h')
-rw-r--r--include/asm-blackfin/nand.h47
1 files changed, 47 insertions, 0 deletions
diff --git a/include/asm-blackfin/nand.h b/include/asm-blackfin/nand.h
new file mode 100644
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+++ b/include/asm-blackfin/nand.h
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+/* 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;
+};