1 /* 2 * arch/arm/plat-omap/include/mach/nand.h 3 * 4 * Copyright (C) 2006 Micron Technology Inc. 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 */ 10 11 #ifndef _MTD_NAND_OMAP2_H 12 #define _MTD_NAND_OMAP2_H 13 14 #include <linux/mtd/partitions.h> 15 16 #define GPMC_BCH_NUM_REMAINDER 8 17 18 enum nand_io { 19 NAND_OMAP_PREFETCH_POLLED = 0, /* prefetch polled mode, default */ 20 NAND_OMAP_POLLED, /* polled mode, without prefetch */ 21 NAND_OMAP_PREFETCH_DMA, /* prefetch enabled sDMA mode */ 22 NAND_OMAP_PREFETCH_IRQ /* prefetch enabled irq mode */ 23 }; 24 25 enum omap_ecc { 26 /* 1-bit ecc: stored at end of spare area */ 27 OMAP_ECC_HAMMING_CODE_DEFAULT = 0, /* Default, s/w method */ 28 OMAP_ECC_HAMMING_CODE_HW, /* gpmc to detect the error */ 29 /* 1-bit ecc: stored at beginning of spare area as romcode */ 30 OMAP_ECC_HAMMING_CODE_HW_ROMCODE, /* gpmc method & romcode layout */ 31 /* 1-bit ECC calculation by GPMC, Error detection by Software */ 32 OMAP_ECC_HAM1_CODE_HW, 33 /* 4-bit ECC calculation by GPMC, Error detection by Software */ 34 OMAP_ECC_BCH4_CODE_HW_DETECTION_SW, 35 /* 4-bit ECC calculation by GPMC, Error detection by ELM */ 36 OMAP_ECC_BCH4_CODE_HW, 37 /* 8-bit ECC calculation by GPMC, Error detection by Software */ 38 OMAP_ECC_BCH8_CODE_HW_DETECTION_SW, 39 /* 8-bit ECC calculation by GPMC, Error detection by ELM */ 40 OMAP_ECC_BCH8_CODE_HW, 41 }; 42 43 struct gpmc_nand_regs { 44 void __iomem *gpmc_status; 45 void __iomem *gpmc_nand_command; 46 void __iomem *gpmc_nand_address; 47 void __iomem *gpmc_nand_data; 48 void __iomem *gpmc_prefetch_config1; 49 void __iomem *gpmc_prefetch_config2; 50 void __iomem *gpmc_prefetch_control; 51 void __iomem *gpmc_prefetch_status; 52 void __iomem *gpmc_ecc_config; 53 void __iomem *gpmc_ecc_control; 54 void __iomem *gpmc_ecc_size_config; 55 void __iomem *gpmc_ecc1_result; 56 void __iomem *gpmc_bch_result0[GPMC_BCH_NUM_REMAINDER]; 57 void __iomem *gpmc_bch_result1[GPMC_BCH_NUM_REMAINDER]; 58 void __iomem *gpmc_bch_result2[GPMC_BCH_NUM_REMAINDER]; 59 void __iomem *gpmc_bch_result3[GPMC_BCH_NUM_REMAINDER]; 60 }; 61 62 struct omap_nand_platform_data { 63 int cs; 64 struct mtd_partition *parts; 65 int nr_parts; 66 bool dev_ready; 67 enum nand_io xfer_type; 68 int devsize; 69 enum omap_ecc ecc_opt; 70 struct gpmc_nand_regs reg; 71 72 /* for passing the partitions */ 73 struct device_node *of_node; 74 struct device_node *elm_of_node; 75 }; 76 #endif 77