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2fdf0c9896
Update helper function that provides gpmc-nand register details for nand driver with bch register information. Using this nand driver can be made self sufficient to handle remaining gpmc-nand operations by itself instead of relying on gpmc exported nand functions. Signed-off-by: Afzal Mohammed <afzal@ti.com>
66 lines
1.9 KiB
C
66 lines
1.9 KiB
C
/*
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* arch/arm/plat-omap/include/mach/nand.h
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*
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* Copyright (C) 2006 Micron Technology Inc.
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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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#ifndef _MTD_NAND_OMAP2_H
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#define _MTD_NAND_OMAP2_H
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#include <linux/mtd/partitions.h>
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#define GPMC_BCH_NUM_REMAINDER 8
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enum nand_io {
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NAND_OMAP_PREFETCH_POLLED = 0, /* prefetch polled mode, default */
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NAND_OMAP_POLLED, /* polled mode, without prefetch */
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NAND_OMAP_PREFETCH_DMA, /* prefetch enabled sDMA mode */
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NAND_OMAP_PREFETCH_IRQ /* prefetch enabled irq mode */
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};
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enum omap_ecc {
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/* 1-bit ecc: stored at end of spare area */
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OMAP_ECC_HAMMING_CODE_DEFAULT = 0, /* Default, s/w method */
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OMAP_ECC_HAMMING_CODE_HW, /* gpmc to detect the error */
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/* 1-bit ecc: stored at beginning of spare area as romcode */
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OMAP_ECC_HAMMING_CODE_HW_ROMCODE, /* gpmc method & romcode layout */
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OMAP_ECC_BCH4_CODE_HW, /* 4-bit BCH ecc code */
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OMAP_ECC_BCH8_CODE_HW, /* 8-bit BCH ecc code */
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};
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struct gpmc_nand_regs {
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void __iomem *gpmc_status;
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void __iomem *gpmc_nand_command;
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void __iomem *gpmc_nand_address;
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void __iomem *gpmc_nand_data;
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void __iomem *gpmc_prefetch_config1;
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void __iomem *gpmc_prefetch_config2;
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void __iomem *gpmc_prefetch_control;
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void __iomem *gpmc_prefetch_status;
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void __iomem *gpmc_ecc_config;
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void __iomem *gpmc_ecc_control;
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void __iomem *gpmc_ecc_size_config;
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void __iomem *gpmc_ecc1_result;
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void __iomem *gpmc_bch_result0[GPMC_BCH_NUM_REMAINDER];
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void __iomem *gpmc_bch_result1[GPMC_BCH_NUM_REMAINDER];
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void __iomem *gpmc_bch_result2[GPMC_BCH_NUM_REMAINDER];
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void __iomem *gpmc_bch_result3[GPMC_BCH_NUM_REMAINDER];
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};
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struct omap_nand_platform_data {
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int cs;
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struct mtd_partition *parts;
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int nr_parts;
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bool dev_ready;
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enum nand_io xfer_type;
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int devsize;
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enum omap_ecc ecc_opt;
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struct gpmc_nand_regs reg;
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};
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#endif
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