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![Siva Durga Prasad Paladugu](/assets/img/avatar_default.png)
Add nand flash controller driver support for zynq SoC. Signed-off-by: Siva Durga Prasad Paladugu <sivadur@xilinx.com> Signed-off-by: Michal Simek <michal.simek@xilinx.com>
1187 lines
33 KiB
C
1187 lines
33 KiB
C
/*
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* (C) Copyright 2016 Xilinx, Inc.
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*
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* Xilinx Zynq NAND Flash Controller Driver
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* This driver is based on plat_nand.c and mxc_nand.c drivers
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*
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* SPDX-License-Identifier: GPL-2.0+
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*/
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#include <common.h>
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#include <malloc.h>
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#include <asm/io.h>
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#include <linux/errno.h>
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#include <nand.h>
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#include <linux/mtd/mtd.h>
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#include <linux/mtd/nand.h>
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#include <linux/mtd/partitions.h>
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#include <linux/mtd/nand_ecc.h>
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#include <asm/arch/hardware.h>
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/* The NAND flash driver defines */
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#define ZYNQ_NAND_CMD_PHASE 1
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#define ZYNQ_NAND_DATA_PHASE 2
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#define ZYNQ_NAND_ECC_SIZE 512
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#define ZYNQ_NAND_SET_OPMODE_8BIT (0 << 0)
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#define ZYNQ_NAND_SET_OPMODE_16BIT (1 << 0)
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#define ZYNQ_NAND_ECC_STATUS (1 << 6)
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#define ZYNQ_MEMC_CLRCR_INT_CLR1 (1 << 4)
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#define ZYNQ_MEMC_SR_RAW_INT_ST1 (1 << 6)
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#define ZYNQ_MEMC_SR_INT_ST1 (1 << 4)
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#define ZYNQ_MEMC_NAND_ECC_MODE_MASK 0xC
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/* Flash memory controller operating parameters */
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#define ZYNQ_NAND_CLR_CONFIG ((0x1 << 1) | /* Disable interrupt */ \
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(0x1 << 4) | /* Clear interrupt */ \
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(0x1 << 6)) /* Disable ECC interrupt */
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/* Assuming 50MHz clock (20ns cycle time) and 3V operation */
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#define ZYNQ_NAND_SET_CYCLES ((0x2 << 20) | /* t_rr from nand_cycles */ \
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(0x2 << 17) | /* t_ar from nand_cycles */ \
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(0x1 << 14) | /* t_clr from nand_cycles */ \
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(0x3 << 11) | /* t_wp from nand_cycles */ \
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(0x2 << 8) | /* t_rea from nand_cycles */ \
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(0x5 << 4) | /* t_wc from nand_cycles */ \
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(0x5 << 0)) /* t_rc from nand_cycles */
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#define ZYNQ_NAND_DIRECT_CMD ((0x4 << 23) | /* Chip 0 from interface 1 */ \
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(0x2 << 21)) /* UpdateRegs operation */
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#define ZYNQ_NAND_ECC_CONFIG ((0x1 << 2) | /* ECC available on APB */ \
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(0x1 << 4) | /* ECC read at end of page */ \
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(0x0 << 5)) /* No Jumping */
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#define ZYNQ_NAND_ECC_CMD1 ((0x80) | /* Write command */ \
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(0x00 << 8) | /* Read command */ \
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(0x30 << 16) | /* Read End command */ \
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(0x1 << 24)) /* Read End command calid */
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#define ZYNQ_NAND_ECC_CMD2 ((0x85) | /* Write col change cmd */ \
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(0x05 << 8) | /* Read col change cmd */ \
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(0xE0 << 16) | /* Read col change end cmd */ \
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(0x1 << 24)) /* Read col change
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end cmd valid */
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/* AXI Address definitions */
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#define START_CMD_SHIFT 3
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#define END_CMD_SHIFT 11
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#define END_CMD_VALID_SHIFT 20
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#define ADDR_CYCLES_SHIFT 21
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#define CLEAR_CS_SHIFT 21
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#define ECC_LAST_SHIFT 10
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#define COMMAND_PHASE (0 << 19)
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#define DATA_PHASE (1 << 19)
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#define ONDIE_ECC_FEATURE_ADDR 0x90
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#define ONDIE_ECC_FEATURE_ENABLE 0x08
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#define ZYNQ_NAND_ECC_LAST (1 << ECC_LAST_SHIFT) /* Set ECC_Last */
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#define ZYNQ_NAND_CLEAR_CS (1 << CLEAR_CS_SHIFT) /* Clear chip select */
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/* ECC block registers bit position and bit mask */
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#define ZYNQ_NAND_ECC_BUSY (1 << 6) /* ECC block is busy */
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#define ZYNQ_NAND_ECC_MASK 0x00FFFFFF /* ECC value mask */
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/* SMC register set */
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struct zynq_nand_smc_regs {
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u32 csr; /* 0x00 */
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u32 reserved0[2];
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u32 cfr; /* 0x0C */
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u32 dcr; /* 0x10 */
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u32 scr; /* 0x14 */
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u32 sor; /* 0x18 */
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u32 reserved1[249];
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u32 esr; /* 0x400 */
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u32 emcr; /* 0x404 */
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u32 emcmd1r; /* 0x408 */
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u32 emcmd2r; /* 0x40C */
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u32 reserved2[2];
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u32 eval0r; /* 0x418 */
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};
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#define zynq_nand_smc_base ((struct zynq_nand_smc_regs __iomem *)\
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ZYNQ_SMC_BASEADDR)
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/*
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* struct zynq_nand_info - Defines the NAND flash driver instance
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* @parts: Pointer to the mtd_partition structure
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* @nand_base: Virtual address of the NAND flash device
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* @end_cmd_pending: End command is pending
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* @end_cmd: End command
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*/
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struct zynq_nand_info {
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void __iomem *nand_base;
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u8 end_cmd_pending;
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u8 end_cmd;
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};
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/*
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* struct zynq_nand_command_format - Defines NAND flash command format
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* @start_cmd: First cycle command (Start command)
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* @end_cmd: Second cycle command (Last command)
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* @addr_cycles: Number of address cycles required to send the address
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* @end_cmd_valid: The second cycle command is valid for cmd or data phase
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*/
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struct zynq_nand_command_format {
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u8 start_cmd;
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u8 end_cmd;
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u8 addr_cycles;
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u8 end_cmd_valid;
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};
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/* The NAND flash operations command format */
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static const struct zynq_nand_command_format zynq_nand_commands[] = {
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{NAND_CMD_READ0, NAND_CMD_READSTART, 5, ZYNQ_NAND_CMD_PHASE},
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{NAND_CMD_RNDOUT, NAND_CMD_RNDOUTSTART, 2, ZYNQ_NAND_CMD_PHASE},
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{NAND_CMD_READID, NAND_CMD_NONE, 1, 0},
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{NAND_CMD_STATUS, NAND_CMD_NONE, 0, 0},
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{NAND_CMD_SEQIN, NAND_CMD_PAGEPROG, 5, ZYNQ_NAND_DATA_PHASE},
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{NAND_CMD_RNDIN, NAND_CMD_NONE, 2, 0},
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{NAND_CMD_ERASE1, NAND_CMD_ERASE2, 3, ZYNQ_NAND_CMD_PHASE},
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{NAND_CMD_RESET, NAND_CMD_NONE, 0, 0},
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{NAND_CMD_PARAM, NAND_CMD_NONE, 1, 0},
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{NAND_CMD_GET_FEATURES, NAND_CMD_NONE, 1, 0},
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{NAND_CMD_SET_FEATURES, NAND_CMD_NONE, 1, 0},
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{NAND_CMD_NONE, NAND_CMD_NONE, 0, 0},
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/* Add all the flash commands supported by the flash device */
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};
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/* Define default oob placement schemes for large and small page devices */
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static struct nand_ecclayout nand_oob_16 = {
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.eccbytes = 3,
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.eccpos = {0, 1, 2},
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.oobfree = {
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{ .offset = 8, .length = 8 }
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}
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};
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static struct nand_ecclayout nand_oob_64 = {
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.eccbytes = 12,
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.eccpos = {
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52, 53, 54, 55, 56, 57,
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58, 59, 60, 61, 62, 63},
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.oobfree = {
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{ .offset = 2, .length = 50 }
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}
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};
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static struct nand_ecclayout ondie_nand_oob_64 = {
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.eccbytes = 32,
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.eccpos = {
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8, 9, 10, 11, 12, 13, 14, 15,
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24, 25, 26, 27, 28, 29, 30, 31,
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40, 41, 42, 43, 44, 45, 46, 47,
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56, 57, 58, 59, 60, 61, 62, 63
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},
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.oobfree = {
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{ .offset = 4, .length = 4 },
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{ .offset = 20, .length = 4 },
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{ .offset = 36, .length = 4 },
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{ .offset = 52, .length = 4 }
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}
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};
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/* bbt decriptors for chips with on-die ECC and
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chips with 64-byte OOB */
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static u8 bbt_pattern[] = {'B', 'b', 't', '0' };
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static u8 mirror_pattern[] = {'1', 't', 'b', 'B' };
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static struct nand_bbt_descr bbt_main_descr = {
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.options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE |
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NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP,
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.offs = 4,
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.len = 4,
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.veroffs = 20,
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.maxblocks = 4,
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.pattern = bbt_pattern
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};
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static struct nand_bbt_descr bbt_mirror_descr = {
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.options = NAND_BBT_LASTBLOCK | NAND_BBT_CREATE | NAND_BBT_WRITE |
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NAND_BBT_2BIT | NAND_BBT_VERSION | NAND_BBT_PERCHIP,
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.offs = 4,
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.len = 4,
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.veroffs = 20,
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.maxblocks = 4,
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.pattern = mirror_pattern
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};
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/*
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* zynq_nand_waitfor_ecc_completion - Wait for ECC completion
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*
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* returns: status for command completion, -1 for Timeout
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*/
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static int zynq_nand_waitfor_ecc_completion(void)
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{
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unsigned long timeout;
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u32 status;
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/* Wait max 10us */
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timeout = 10;
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status = readl(&zynq_nand_smc_base->esr);
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while (status & ZYNQ_NAND_ECC_BUSY) {
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status = readl(&zynq_nand_smc_base->esr);
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if (timeout == 0)
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return -1;
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timeout--;
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udelay(1);
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}
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return status;
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}
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/*
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* zynq_nand_init_nand_flash - Initialize NAND controller
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* @option: Device property flags
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*
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* This function initializes the NAND flash interface on the NAND controller.
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*
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* returns: 0 on success or error value on failure
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*/
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static int zynq_nand_init_nand_flash(int option)
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{
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u32 status;
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/* disable interrupts */
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writel(ZYNQ_NAND_CLR_CONFIG, &zynq_nand_smc_base->cfr);
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/* Initialize the NAND interface by setting cycles and operation mode */
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writel(ZYNQ_NAND_SET_CYCLES, &zynq_nand_smc_base->scr);
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if (option & NAND_BUSWIDTH_16)
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writel(ZYNQ_NAND_SET_OPMODE_16BIT, &zynq_nand_smc_base->sor);
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else
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writel(ZYNQ_NAND_SET_OPMODE_8BIT, &zynq_nand_smc_base->sor);
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writel(ZYNQ_NAND_DIRECT_CMD, &zynq_nand_smc_base->dcr);
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/* Wait till the ECC operation is complete */
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status = zynq_nand_waitfor_ecc_completion();
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if (status < 0) {
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printf("%s: Timeout\n", __func__);
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return status;
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}
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/* Set the command1 and command2 register */
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writel(ZYNQ_NAND_ECC_CMD1, &zynq_nand_smc_base->emcmd1r);
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writel(ZYNQ_NAND_ECC_CMD2, &zynq_nand_smc_base->emcmd2r);
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return 0;
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}
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/*
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* zynq_nand_calculate_hwecc - Calculate Hardware ECC
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* @mtd: Pointer to the mtd_info structure
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* @data: Pointer to the page data
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* @ecc_code: Pointer to the ECC buffer where ECC data needs to be stored
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*
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* This function retrieves the Hardware ECC data from the controller and returns
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* ECC data back to the MTD subsystem.
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*
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* returns: 0 on success or error value on failure
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*/
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static int zynq_nand_calculate_hwecc(struct mtd_info *mtd, const u8 *data,
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u8 *ecc_code)
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{
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u32 ecc_value = 0;
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u8 ecc_reg, ecc_byte;
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u32 ecc_status;
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/* Wait till the ECC operation is complete */
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ecc_status = zynq_nand_waitfor_ecc_completion();
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if (ecc_status < 0) {
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printf("%s: Timeout\n", __func__);
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return ecc_status;
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}
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for (ecc_reg = 0; ecc_reg < 4; ecc_reg++) {
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/* Read ECC value for each block */
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ecc_value = readl(&zynq_nand_smc_base->eval0r + ecc_reg);
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/* Get the ecc status from ecc read value */
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ecc_status = (ecc_value >> 24) & 0xFF;
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/* ECC value valid */
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if (ecc_status & ZYNQ_NAND_ECC_STATUS) {
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for (ecc_byte = 0; ecc_byte < 3; ecc_byte++) {
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/* Copy ECC bytes to MTD buffer */
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*ecc_code = ecc_value & 0xFF;
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ecc_value = ecc_value >> 8;
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ecc_code++;
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}
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} else {
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debug("%s: ecc status failed\n", __func__);
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}
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}
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return 0;
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}
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/*
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* onehot - onehot function
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* @value: value to check for onehot
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*
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* This function checks whether a value is onehot or not.
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* onehot is if and only if one bit is set.
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*
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* FIXME: Try to move this in common.h
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*/
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static bool onehot(unsigned short value)
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{
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bool onehot;
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onehot = value && !(value & (value - 1));
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return onehot;
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}
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/*
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* zynq_nand_correct_data - ECC correction function
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* @mtd: Pointer to the mtd_info structure
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* @buf: Pointer to the page data
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* @read_ecc: Pointer to the ECC value read from spare data area
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* @calc_ecc: Pointer to the calculated ECC value
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*
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* This function corrects the ECC single bit errors & detects 2-bit errors.
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*
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* returns: 0 if no ECC errors found
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* 1 if single bit error found and corrected.
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* -1 if multiple ECC errors found.
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*/
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static int zynq_nand_correct_data(struct mtd_info *mtd, unsigned char *buf,
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unsigned char *read_ecc, unsigned char *calc_ecc)
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{
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unsigned char bit_addr;
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unsigned int byte_addr;
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unsigned short ecc_odd, ecc_even;
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unsigned short read_ecc_lower, read_ecc_upper;
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unsigned short calc_ecc_lower, calc_ecc_upper;
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read_ecc_lower = (read_ecc[0] | (read_ecc[1] << 8)) & 0xfff;
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read_ecc_upper = ((read_ecc[1] >> 4) | (read_ecc[2] << 4)) & 0xfff;
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calc_ecc_lower = (calc_ecc[0] | (calc_ecc[1] << 8)) & 0xfff;
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calc_ecc_upper = ((calc_ecc[1] >> 4) | (calc_ecc[2] << 4)) & 0xfff;
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ecc_odd = read_ecc_lower ^ calc_ecc_lower;
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ecc_even = read_ecc_upper ^ calc_ecc_upper;
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if ((ecc_odd == 0) && (ecc_even == 0))
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return 0; /* no error */
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if (ecc_odd == (~ecc_even & 0xfff)) {
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/* bits [11:3] of error code is byte offset */
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byte_addr = (ecc_odd >> 3) & 0x1ff;
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/* bits [2:0] of error code is bit offset */
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bit_addr = ecc_odd & 0x7;
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/* Toggling error bit */
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buf[byte_addr] ^= (1 << bit_addr);
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return 1;
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}
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if (onehot(ecc_odd | ecc_even))
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return 1; /* one error in parity */
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return -1; /* Uncorrectable error */
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}
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/*
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* zynq_nand_read_oob - [REPLACABLE] the most common OOB data read function
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* @mtd: mtd info structure
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* @chip: nand chip info structure
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* @page: page number to read
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* @sndcmd: flag whether to issue read command or not
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*/
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static int zynq_nand_read_oob(struct mtd_info *mtd, struct nand_chip *chip,
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int page)
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{
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unsigned long data_phase_addr = 0;
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int data_width = 4;
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u8 *p;
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chip->cmdfunc(mtd, NAND_CMD_READOOB, 0, page);
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p = chip->oob_poi;
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chip->read_buf(mtd, p, (mtd->oobsize - data_width));
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p += mtd->oobsize - data_width;
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data_phase_addr = (unsigned long)chip->IO_ADDR_R;
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data_phase_addr |= ZYNQ_NAND_CLEAR_CS;
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chip->IO_ADDR_R = (void __iomem *)data_phase_addr;
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chip->read_buf(mtd, p, data_width);
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return 0;
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}
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/*
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* zynq_nand_write_oob - [REPLACABLE] the most common OOB data write function
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* @mtd: mtd info structure
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* @chip: nand chip info structure
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* @page: page number to write
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*/
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static int zynq_nand_write_oob(struct mtd_info *mtd, struct nand_chip *chip,
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int page)
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{
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int status = 0, data_width = 4;
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const u8 *buf = chip->oob_poi;
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unsigned long data_phase_addr = 0;
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chip->cmdfunc(mtd, NAND_CMD_SEQIN, mtd->writesize, page);
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chip->write_buf(mtd, buf, (mtd->oobsize - data_width));
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buf += mtd->oobsize - data_width;
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data_phase_addr = (unsigned long)chip->IO_ADDR_W;
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data_phase_addr |= ZYNQ_NAND_CLEAR_CS;
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data_phase_addr |= (1 << END_CMD_VALID_SHIFT);
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chip->IO_ADDR_W = (void __iomem *)data_phase_addr;
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chip->write_buf(mtd, buf, data_width);
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/* Send command to program the OOB data */
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chip->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1);
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status = chip->waitfunc(mtd, chip);
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return status & NAND_STATUS_FAIL ? -EIO : 0;
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|
}
|
|
|
|
/*
|
|
* zynq_nand_read_page_raw - [Intern] read raw page data without ecc
|
|
* @mtd: mtd info structure
|
|
* @chip: nand chip info structure
|
|
* @buf: buffer to store read data
|
|
* @oob_required: must write chip->oob_poi to OOB
|
|
* @page: page number to read
|
|
*/
|
|
static int zynq_nand_read_page_raw(struct mtd_info *mtd, struct nand_chip *chip,
|
|
u8 *buf, int oob_required, int page)
|
|
{
|
|
unsigned long data_width = 4;
|
|
unsigned long data_phase_addr = 0;
|
|
u8 *p;
|
|
|
|
chip->read_buf(mtd, buf, mtd->writesize);
|
|
|
|
p = chip->oob_poi;
|
|
chip->read_buf(mtd, p, (mtd->oobsize - data_width));
|
|
p += (mtd->oobsize - data_width);
|
|
|
|
data_phase_addr = (unsigned long)chip->IO_ADDR_R;
|
|
data_phase_addr |= ZYNQ_NAND_CLEAR_CS;
|
|
chip->IO_ADDR_R = (void __iomem *)data_phase_addr;
|
|
|
|
chip->read_buf(mtd, p, data_width);
|
|
return 0;
|
|
}
|
|
|
|
static int zynq_nand_read_page_raw_nooob(struct mtd_info *mtd,
|
|
struct nand_chip *chip, u8 *buf, int oob_required, int page)
|
|
{
|
|
chip->read_buf(mtd, buf, mtd->writesize);
|
|
return 0;
|
|
}
|
|
|
|
static int zynq_nand_read_subpage_raw(struct mtd_info *mtd,
|
|
struct nand_chip *chip, u32 data_offs,
|
|
u32 readlen, u8 *buf, int page)
|
|
{
|
|
if (data_offs != 0) {
|
|
chip->cmdfunc(mtd, NAND_CMD_RNDOUT, data_offs, -1);
|
|
buf += data_offs;
|
|
}
|
|
chip->read_buf(mtd, buf, readlen);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* zynq_nand_write_page_raw - [Intern] raw page write function
|
|
* @mtd: mtd info structure
|
|
* @chip: nand chip info structure
|
|
* @buf: data buffer
|
|
* @oob_required: must write chip->oob_poi to OOB
|
|
*/
|
|
static int zynq_nand_write_page_raw(struct mtd_info *mtd,
|
|
struct nand_chip *chip, const u8 *buf, int oob_required, int page)
|
|
{
|
|
unsigned long data_width = 4;
|
|
unsigned long data_phase_addr = 0;
|
|
u8 *p;
|
|
|
|
chip->write_buf(mtd, buf, mtd->writesize);
|
|
|
|
p = chip->oob_poi;
|
|
chip->write_buf(mtd, p, (mtd->oobsize - data_width));
|
|
p += (mtd->oobsize - data_width);
|
|
|
|
data_phase_addr = (unsigned long)chip->IO_ADDR_W;
|
|
data_phase_addr |= ZYNQ_NAND_CLEAR_CS;
|
|
data_phase_addr |= (1 << END_CMD_VALID_SHIFT);
|
|
chip->IO_ADDR_W = (void __iomem *)data_phase_addr;
|
|
|
|
chip->write_buf(mtd, p, data_width);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* nand_write_page_hwecc - Hardware ECC based page write function
|
|
* @mtd: Pointer to the mtd info structure
|
|
* @chip: Pointer to the NAND chip info structure
|
|
* @buf: Pointer to the data buffer
|
|
* @oob_required: must write chip->oob_poi to OOB
|
|
*
|
|
* This functions writes data and hardware generated ECC values in to the page.
|
|
*/
|
|
static int zynq_nand_write_page_hwecc(struct mtd_info *mtd,
|
|
struct nand_chip *chip, const u8 *buf, int oob_required, int page)
|
|
{
|
|
int i, eccsteps, eccsize = chip->ecc.size;
|
|
u8 *ecc_calc = chip->buffers->ecccalc;
|
|
const u8 *p = buf;
|
|
u32 *eccpos = chip->ecc.layout->eccpos;
|
|
unsigned long data_phase_addr = 0;
|
|
unsigned long data_width = 4;
|
|
u8 *oob_ptr;
|
|
|
|
for (eccsteps = chip->ecc.steps; (eccsteps - 1); eccsteps--) {
|
|
chip->write_buf(mtd, p, eccsize);
|
|
p += eccsize;
|
|
}
|
|
chip->write_buf(mtd, p, (eccsize - data_width));
|
|
p += eccsize - data_width;
|
|
|
|
/* Set ECC Last bit to 1 */
|
|
data_phase_addr = (unsigned long) chip->IO_ADDR_W;
|
|
data_phase_addr |= ZYNQ_NAND_ECC_LAST;
|
|
chip->IO_ADDR_W = (void __iomem *)data_phase_addr;
|
|
chip->write_buf(mtd, p, data_width);
|
|
|
|
/* Wait for ECC to be calculated and read the error values */
|
|
p = buf;
|
|
chip->ecc.calculate(mtd, p, &ecc_calc[0]);
|
|
|
|
for (i = 0; i < chip->ecc.total; i++)
|
|
chip->oob_poi[eccpos[i]] = ~(ecc_calc[i]);
|
|
|
|
/* Clear ECC last bit */
|
|
data_phase_addr = (unsigned long)chip->IO_ADDR_W;
|
|
data_phase_addr &= ~ZYNQ_NAND_ECC_LAST;
|
|
chip->IO_ADDR_W = (void __iomem *)data_phase_addr;
|
|
|
|
/* Write the spare area with ECC bytes */
|
|
oob_ptr = chip->oob_poi;
|
|
chip->write_buf(mtd, oob_ptr, (mtd->oobsize - data_width));
|
|
|
|
data_phase_addr = (unsigned long)chip->IO_ADDR_W;
|
|
data_phase_addr |= ZYNQ_NAND_CLEAR_CS;
|
|
data_phase_addr |= (1 << END_CMD_VALID_SHIFT);
|
|
chip->IO_ADDR_W = (void __iomem *)data_phase_addr;
|
|
oob_ptr += (mtd->oobsize - data_width);
|
|
chip->write_buf(mtd, oob_ptr, data_width);
|
|
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* zynq_nand_write_page_swecc - [REPLACABLE] software ecc based page
|
|
* write function
|
|
* @mtd: mtd info structure
|
|
* @chip: nand chip info structure
|
|
* @buf: data buffer
|
|
* @oob_required: must write chip->oob_poi to OOB
|
|
*/
|
|
static int zynq_nand_write_page_swecc(struct mtd_info *mtd,
|
|
struct nand_chip *chip, const u8 *buf, int oob_required, int page)
|
|
{
|
|
int i, eccsize = chip->ecc.size;
|
|
int eccbytes = chip->ecc.bytes;
|
|
int eccsteps = chip->ecc.steps;
|
|
u8 *ecc_calc = chip->buffers->ecccalc;
|
|
const u8 *p = buf;
|
|
u32 *eccpos = chip->ecc.layout->eccpos;
|
|
|
|
/* Software ecc calculation */
|
|
for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize)
|
|
chip->ecc.calculate(mtd, p, &ecc_calc[i]);
|
|
|
|
for (i = 0; i < chip->ecc.total; i++)
|
|
chip->oob_poi[eccpos[i]] = ecc_calc[i];
|
|
|
|
return chip->ecc.write_page_raw(mtd, chip, buf, 1, page);
|
|
}
|
|
|
|
/*
|
|
* nand_read_page_hwecc - Hardware ECC based page read function
|
|
* @mtd: Pointer to the mtd info structure
|
|
* @chip: Pointer to the NAND chip info structure
|
|
* @buf: Pointer to the buffer to store read data
|
|
* @oob_required: must write chip->oob_poi to OOB
|
|
* @page: page number to read
|
|
*
|
|
* This functions reads data and checks the data integrity by comparing hardware
|
|
* generated ECC values and read ECC values from spare area.
|
|
*
|
|
* returns: 0 always and updates ECC operation status in to MTD structure
|
|
*/
|
|
static int zynq_nand_read_page_hwecc(struct mtd_info *mtd,
|
|
struct nand_chip *chip, u8 *buf, int oob_required, int page)
|
|
{
|
|
int i, stat, eccsteps, eccsize = chip->ecc.size;
|
|
int eccbytes = chip->ecc.bytes;
|
|
u8 *p = buf;
|
|
u8 *ecc_calc = chip->buffers->ecccalc;
|
|
u8 *ecc_code = chip->buffers->ecccode;
|
|
u32 *eccpos = chip->ecc.layout->eccpos;
|
|
unsigned long data_phase_addr = 0;
|
|
unsigned long data_width = 4;
|
|
u8 *oob_ptr;
|
|
|
|
for (eccsteps = chip->ecc.steps; (eccsteps - 1); eccsteps--) {
|
|
chip->read_buf(mtd, p, eccsize);
|
|
p += eccsize;
|
|
}
|
|
chip->read_buf(mtd, p, (eccsize - data_width));
|
|
p += eccsize - data_width;
|
|
|
|
/* Set ECC Last bit to 1 */
|
|
data_phase_addr = (unsigned long)chip->IO_ADDR_R;
|
|
data_phase_addr |= ZYNQ_NAND_ECC_LAST;
|
|
chip->IO_ADDR_R = (void __iomem *)data_phase_addr;
|
|
chip->read_buf(mtd, p, data_width);
|
|
|
|
/* Read the calculated ECC value */
|
|
p = buf;
|
|
chip->ecc.calculate(mtd, p, &ecc_calc[0]);
|
|
|
|
/* Clear ECC last bit */
|
|
data_phase_addr = (unsigned long)chip->IO_ADDR_R;
|
|
data_phase_addr &= ~ZYNQ_NAND_ECC_LAST;
|
|
chip->IO_ADDR_R = (void __iomem *)data_phase_addr;
|
|
|
|
/* Read the stored ECC value */
|
|
oob_ptr = chip->oob_poi;
|
|
chip->read_buf(mtd, oob_ptr, (mtd->oobsize - data_width));
|
|
|
|
/* de-assert chip select */
|
|
data_phase_addr = (unsigned long)chip->IO_ADDR_R;
|
|
data_phase_addr |= ZYNQ_NAND_CLEAR_CS;
|
|
chip->IO_ADDR_R = (void __iomem *)data_phase_addr;
|
|
|
|
oob_ptr += (mtd->oobsize - data_width);
|
|
chip->read_buf(mtd, oob_ptr, data_width);
|
|
|
|
for (i = 0; i < chip->ecc.total; i++)
|
|
ecc_code[i] = ~(chip->oob_poi[eccpos[i]]);
|
|
|
|
eccsteps = chip->ecc.steps;
|
|
p = buf;
|
|
|
|
/* Check ECC error for all blocks and correct if it is correctable */
|
|
for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
|
|
stat = chip->ecc.correct(mtd, p, &ecc_code[i], &ecc_calc[i]);
|
|
if (stat < 0)
|
|
mtd->ecc_stats.failed++;
|
|
else
|
|
mtd->ecc_stats.corrected += stat;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* zynq_nand_read_page_swecc - [REPLACABLE] software ecc based page
|
|
* read function
|
|
* @mtd: mtd info structure
|
|
* @chip: nand chip info structure
|
|
* @buf: buffer to store read data
|
|
* @page: page number to read
|
|
*/
|
|
static int zynq_nand_read_page_swecc(struct mtd_info *mtd,
|
|
struct nand_chip *chip, u8 *buf, int oob_required, int page)
|
|
{
|
|
int i, eccsize = chip->ecc.size;
|
|
int eccbytes = chip->ecc.bytes;
|
|
int eccsteps = chip->ecc.steps;
|
|
u8 *p = buf;
|
|
u8 *ecc_calc = chip->buffers->ecccalc;
|
|
u8 *ecc_code = chip->buffers->ecccode;
|
|
u32 *eccpos = chip->ecc.layout->eccpos;
|
|
|
|
chip->ecc.read_page_raw(mtd, chip, buf, 1, page);
|
|
|
|
for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize)
|
|
chip->ecc.calculate(mtd, p, &ecc_calc[i]);
|
|
|
|
for (i = 0; i < chip->ecc.total; i++)
|
|
ecc_code[i] = chip->oob_poi[eccpos[i]];
|
|
|
|
eccsteps = chip->ecc.steps;
|
|
p = buf;
|
|
|
|
for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
|
|
int stat;
|
|
|
|
stat = chip->ecc.correct(mtd, p, &ecc_code[i], &ecc_calc[i]);
|
|
if (stat < 0)
|
|
mtd->ecc_stats.failed++;
|
|
else
|
|
mtd->ecc_stats.corrected += stat;
|
|
}
|
|
return 0;
|
|
}
|
|
|
|
/*
|
|
* zynq_nand_select_chip - Select the flash device
|
|
* @mtd: Pointer to the mtd_info structure
|
|
* @chip: Chip number to be selected
|
|
*
|
|
* This function is empty as the NAND controller handles chip select line
|
|
* internally based on the chip address passed in command and data phase.
|
|
*/
|
|
static void zynq_nand_select_chip(struct mtd_info *mtd, int chip)
|
|
{
|
|
/* Not support multiple chips yet */
|
|
}
|
|
|
|
/*
|
|
* zynq_nand_cmd_function - Send command to NAND device
|
|
* @mtd: Pointer to the mtd_info structure
|
|
* @command: The command to be sent to the flash device
|
|
* @column: The column address for this command, -1 if none
|
|
* @page_addr: The page address for this command, -1 if none
|
|
*/
|
|
static void zynq_nand_cmd_function(struct mtd_info *mtd, unsigned int command,
|
|
int column, int page_addr)
|
|
{
|
|
struct nand_chip *chip = mtd->priv;
|
|
const struct zynq_nand_command_format *curr_cmd = NULL;
|
|
struct zynq_nand_info *xnand = (struct zynq_nand_info *)chip->priv;
|
|
void *cmd_addr;
|
|
unsigned long cmd_data = 0;
|
|
unsigned long cmd_phase_addr = 0;
|
|
unsigned long data_phase_addr = 0;
|
|
u8 end_cmd = 0;
|
|
u8 end_cmd_valid = 0;
|
|
u32 index;
|
|
|
|
if (xnand->end_cmd_pending) {
|
|
/* Check for end command if this command request is same as the
|
|
* pending command then return
|
|
*/
|
|
if (xnand->end_cmd == command) {
|
|
xnand->end_cmd = 0;
|
|
xnand->end_cmd_pending = 0;
|
|
return;
|
|
}
|
|
}
|
|
|
|
/* Emulate NAND_CMD_READOOB for large page device */
|
|
if ((mtd->writesize > ZYNQ_NAND_ECC_SIZE) &&
|
|
(command == NAND_CMD_READOOB)) {
|
|
column += mtd->writesize;
|
|
command = NAND_CMD_READ0;
|
|
}
|
|
|
|
/* Get the command format */
|
|
for (index = 0; index < ARRAY_SIZE(zynq_nand_commands); index++)
|
|
if (command == zynq_nand_commands[index].start_cmd)
|
|
break;
|
|
|
|
if (index == ARRAY_SIZE(zynq_nand_commands)) {
|
|
printf("%s: Unsupported start cmd %02x\n", __func__, command);
|
|
return;
|
|
}
|
|
curr_cmd = &zynq_nand_commands[index];
|
|
|
|
/* Clear interrupt */
|
|
writel(ZYNQ_MEMC_CLRCR_INT_CLR1, &zynq_nand_smc_base->cfr);
|
|
|
|
/* Get the command phase address */
|
|
if (curr_cmd->end_cmd_valid == ZYNQ_NAND_CMD_PHASE)
|
|
end_cmd_valid = 1;
|
|
|
|
if (curr_cmd->end_cmd == NAND_CMD_NONE)
|
|
end_cmd = 0x0;
|
|
else
|
|
end_cmd = curr_cmd->end_cmd;
|
|
|
|
cmd_phase_addr = (unsigned long)xnand->nand_base |
|
|
(curr_cmd->addr_cycles << ADDR_CYCLES_SHIFT) |
|
|
(end_cmd_valid << END_CMD_VALID_SHIFT) |
|
|
(COMMAND_PHASE) |
|
|
(end_cmd << END_CMD_SHIFT) |
|
|
(curr_cmd->start_cmd << START_CMD_SHIFT);
|
|
|
|
cmd_addr = (void __iomem *)cmd_phase_addr;
|
|
|
|
/* Get the data phase address */
|
|
end_cmd_valid = 0;
|
|
|
|
data_phase_addr = (unsigned long)xnand->nand_base |
|
|
(0x0 << CLEAR_CS_SHIFT) |
|
|
(end_cmd_valid << END_CMD_VALID_SHIFT) |
|
|
(DATA_PHASE) |
|
|
(end_cmd << END_CMD_SHIFT) |
|
|
(0x0 << ECC_LAST_SHIFT);
|
|
|
|
chip->IO_ADDR_R = (void __iomem *)data_phase_addr;
|
|
chip->IO_ADDR_W = chip->IO_ADDR_R;
|
|
|
|
/* Command phase AXI Read & Write */
|
|
if (column != -1 && page_addr != -1) {
|
|
/* Adjust columns for 16 bit bus width */
|
|
if (chip->options & NAND_BUSWIDTH_16)
|
|
column >>= 1;
|
|
cmd_data = column;
|
|
if (mtd->writesize > ZYNQ_NAND_ECC_SIZE) {
|
|
cmd_data |= page_addr << 16;
|
|
/* Another address cycle for devices > 128MiB */
|
|
if (chip->chipsize > (128 << 20)) {
|
|
writel(cmd_data, cmd_addr);
|
|
cmd_data = (page_addr >> 16);
|
|
}
|
|
} else {
|
|
cmd_data |= page_addr << 8;
|
|
}
|
|
} else if (page_addr != -1) { /* Erase */
|
|
cmd_data = page_addr;
|
|
} else if (column != -1) { /* Change read/write column, read id etc */
|
|
/* Adjust columns for 16 bit bus width */
|
|
if ((chip->options & NAND_BUSWIDTH_16) &&
|
|
((command == NAND_CMD_READ0) ||
|
|
(command == NAND_CMD_SEQIN) ||
|
|
(command == NAND_CMD_RNDOUT) ||
|
|
(command == NAND_CMD_RNDIN)))
|
|
column >>= 1;
|
|
cmd_data = column;
|
|
}
|
|
|
|
writel(cmd_data, cmd_addr);
|
|
|
|
if (curr_cmd->end_cmd_valid) {
|
|
xnand->end_cmd = curr_cmd->end_cmd;
|
|
xnand->end_cmd_pending = 1;
|
|
}
|
|
|
|
ndelay(100);
|
|
|
|
if ((command == NAND_CMD_READ0) ||
|
|
(command == NAND_CMD_RESET) ||
|
|
(command == NAND_CMD_PARAM) ||
|
|
(command == NAND_CMD_GET_FEATURES))
|
|
/* wait until command is processed */
|
|
nand_wait_ready(mtd);
|
|
}
|
|
|
|
/*
|
|
* zynq_nand_read_buf - read chip data into buffer
|
|
* @mtd: MTD device structure
|
|
* @buf: buffer to store date
|
|
* @len: number of bytes to read
|
|
*/
|
|
static void zynq_nand_read_buf(struct mtd_info *mtd, u8 *buf, int len)
|
|
{
|
|
struct nand_chip *chip = mtd->priv;
|
|
|
|
/* Make sure that buf is 32 bit aligned */
|
|
if (((unsigned long)buf & 0x3) != 0) {
|
|
if (((unsigned long)buf & 0x1) != 0) {
|
|
if (len) {
|
|
*buf = readb(chip->IO_ADDR_R);
|
|
buf += 1;
|
|
len--;
|
|
}
|
|
}
|
|
|
|
if (((unsigned long)buf & 0x3) != 0) {
|
|
if (len >= 2) {
|
|
*(u16 *)buf = readw(chip->IO_ADDR_R);
|
|
buf += 2;
|
|
len -= 2;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* copy aligned data */
|
|
while (len >= 4) {
|
|
*(u32 *)buf = readl(chip->IO_ADDR_R);
|
|
buf += 4;
|
|
len -= 4;
|
|
}
|
|
|
|
/* mop up any remaining bytes */
|
|
if (len) {
|
|
if (len >= 2) {
|
|
*(u16 *)buf = readw(chip->IO_ADDR_R);
|
|
buf += 2;
|
|
len -= 2;
|
|
}
|
|
if (len)
|
|
*buf = readb(chip->IO_ADDR_R);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* zynq_nand_write_buf - write buffer to chip
|
|
* @mtd: MTD device structure
|
|
* @buf: data buffer
|
|
* @len: number of bytes to write
|
|
*/
|
|
static void zynq_nand_write_buf(struct mtd_info *mtd, const u8 *buf, int len)
|
|
{
|
|
struct nand_chip *chip = mtd->priv;
|
|
const u32 *nand = chip->IO_ADDR_W;
|
|
|
|
/* Make sure that buf is 32 bit aligned */
|
|
if (((unsigned long)buf & 0x3) != 0) {
|
|
if (((unsigned long)buf & 0x1) != 0) {
|
|
if (len) {
|
|
writeb(*buf, nand);
|
|
buf += 1;
|
|
len--;
|
|
}
|
|
}
|
|
|
|
if (((unsigned long)buf & 0x3) != 0) {
|
|
if (len >= 2) {
|
|
writew(*(u16 *)buf, nand);
|
|
buf += 2;
|
|
len -= 2;
|
|
}
|
|
}
|
|
}
|
|
|
|
/* copy aligned data */
|
|
while (len >= 4) {
|
|
writel(*(u32 *)buf, nand);
|
|
buf += 4;
|
|
len -= 4;
|
|
}
|
|
|
|
/* mop up any remaining bytes */
|
|
if (len) {
|
|
if (len >= 2) {
|
|
writew(*(u16 *)buf, nand);
|
|
buf += 2;
|
|
len -= 2;
|
|
}
|
|
|
|
if (len)
|
|
writeb(*buf, nand);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* zynq_nand_device_ready - Check device ready/busy line
|
|
* @mtd: Pointer to the mtd_info structure
|
|
*
|
|
* returns: 0 on busy or 1 on ready state
|
|
*/
|
|
static int zynq_nand_device_ready(struct mtd_info *mtd)
|
|
{
|
|
u32 csr_val;
|
|
|
|
csr_val = readl(&zynq_nand_smc_base->csr);
|
|
/* Check the raw_int_status1 bit */
|
|
if (csr_val & ZYNQ_MEMC_SR_RAW_INT_ST1) {
|
|
/* Clear the interrupt condition */
|
|
writel(ZYNQ_MEMC_SR_INT_ST1, &zynq_nand_smc_base->cfr);
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int zynq_nand_init(struct nand_chip *nand_chip, int devnum)
|
|
{
|
|
struct zynq_nand_info *xnand;
|
|
struct mtd_info *mtd;
|
|
unsigned long ecc_page_size;
|
|
u8 maf_id, dev_id, i;
|
|
u8 get_feature[4];
|
|
u8 set_feature[4] = {ONDIE_ECC_FEATURE_ENABLE, 0x00, 0x00, 0x00};
|
|
unsigned long ecc_cfg;
|
|
int ondie_ecc_enabled = 0;
|
|
int err = -1;
|
|
|
|
xnand = calloc(1, sizeof(struct zynq_nand_info));
|
|
if (!xnand) {
|
|
printf("%s: failed to allocate\n", __func__);
|
|
goto fail;
|
|
}
|
|
|
|
xnand->nand_base = (void __iomem *)ZYNQ_NAND_BASEADDR;
|
|
mtd = (struct mtd_info *)&nand_info[0];
|
|
|
|
nand_chip->priv = xnand;
|
|
mtd->priv = nand_chip;
|
|
|
|
/* Set address of NAND IO lines */
|
|
nand_chip->IO_ADDR_R = xnand->nand_base;
|
|
nand_chip->IO_ADDR_W = xnand->nand_base;
|
|
|
|
/* Set the driver entry points for MTD */
|
|
nand_chip->cmdfunc = zynq_nand_cmd_function;
|
|
nand_chip->dev_ready = zynq_nand_device_ready;
|
|
nand_chip->select_chip = zynq_nand_select_chip;
|
|
|
|
/* If we don't set this delay driver sets 20us by default */
|
|
nand_chip->chip_delay = 30;
|
|
|
|
/* Buffer read/write routines */
|
|
nand_chip->read_buf = zynq_nand_read_buf;
|
|
nand_chip->write_buf = zynq_nand_write_buf;
|
|
|
|
nand_chip->bbt_options = NAND_BBT_USE_FLASH;
|
|
|
|
/* Initialize the NAND flash interface on NAND controller */
|
|
if (zynq_nand_init_nand_flash(nand_chip->options) < 0) {
|
|
printf("%s: nand flash init failed\n", __func__);
|
|
goto fail;
|
|
}
|
|
|
|
/* first scan to find the device and get the page size */
|
|
if (nand_scan_ident(mtd, 1, NULL)) {
|
|
printf("%s: nand_scan_ident failed\n", __func__);
|
|
goto fail;
|
|
}
|
|
/* Send the command for reading device ID */
|
|
nand_chip->cmdfunc(mtd, NAND_CMD_RESET, -1, -1);
|
|
nand_chip->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1);
|
|
|
|
/* Read manufacturer and device IDs */
|
|
maf_id = nand_chip->read_byte(mtd);
|
|
dev_id = nand_chip->read_byte(mtd);
|
|
|
|
if ((maf_id == 0x2c) && ((dev_id == 0xf1) ||
|
|
(dev_id == 0xa1) || (dev_id == 0xb1) ||
|
|
(dev_id == 0xaa) || (dev_id == 0xba) ||
|
|
(dev_id == 0xda) || (dev_id == 0xca) ||
|
|
(dev_id == 0xac) || (dev_id == 0xbc) ||
|
|
(dev_id == 0xdc) || (dev_id == 0xcc) ||
|
|
(dev_id == 0xa3) || (dev_id == 0xb3) ||
|
|
(dev_id == 0xd3) || (dev_id == 0xc3))) {
|
|
nand_chip->cmdfunc(mtd, NAND_CMD_SET_FEATURES,
|
|
ONDIE_ECC_FEATURE_ADDR, -1);
|
|
for (i = 0; i < 4; i++)
|
|
writeb(set_feature[i], nand_chip->IO_ADDR_W);
|
|
|
|
/* Wait for 1us after writing data with SET_FEATURES command */
|
|
ndelay(1000);
|
|
|
|
nand_chip->cmdfunc(mtd, NAND_CMD_GET_FEATURES,
|
|
ONDIE_ECC_FEATURE_ADDR, -1);
|
|
nand_chip->read_buf(mtd, get_feature, 4);
|
|
|
|
if (get_feature[0] & ONDIE_ECC_FEATURE_ENABLE) {
|
|
debug("%s: OnDie ECC flash\n", __func__);
|
|
ondie_ecc_enabled = 1;
|
|
} else {
|
|
printf("%s: Unable to detect OnDie ECC\n", __func__);
|
|
}
|
|
}
|
|
|
|
if (ondie_ecc_enabled) {
|
|
/* Bypass the controller ECC block */
|
|
ecc_cfg = readl(&zynq_nand_smc_base->emcr);
|
|
ecc_cfg &= ~ZYNQ_MEMC_NAND_ECC_MODE_MASK;
|
|
writel(ecc_cfg, &zynq_nand_smc_base->emcr);
|
|
|
|
/* The software ECC routines won't work
|
|
* with the SMC controller
|
|
*/
|
|
nand_chip->ecc.mode = NAND_ECC_HW;
|
|
nand_chip->ecc.strength = 1;
|
|
nand_chip->ecc.read_page = zynq_nand_read_page_raw_nooob;
|
|
nand_chip->ecc.read_subpage = zynq_nand_read_subpage_raw;
|
|
nand_chip->ecc.write_page = zynq_nand_write_page_raw;
|
|
nand_chip->ecc.read_page_raw = zynq_nand_read_page_raw;
|
|
nand_chip->ecc.write_page_raw = zynq_nand_write_page_raw;
|
|
nand_chip->ecc.read_oob = zynq_nand_read_oob;
|
|
nand_chip->ecc.write_oob = zynq_nand_write_oob;
|
|
nand_chip->ecc.size = mtd->writesize;
|
|
nand_chip->ecc.bytes = 0;
|
|
|
|
/* NAND with on-die ECC supports subpage reads */
|
|
nand_chip->options |= NAND_SUBPAGE_READ;
|
|
|
|
/* On-Die ECC spare bytes offset 8 is used for ECC codes */
|
|
if (ondie_ecc_enabled) {
|
|
nand_chip->ecc.layout = &ondie_nand_oob_64;
|
|
/* Use the BBT pattern descriptors */
|
|
nand_chip->bbt_td = &bbt_main_descr;
|
|
nand_chip->bbt_md = &bbt_mirror_descr;
|
|
}
|
|
} else {
|
|
/* Hardware ECC generates 3 bytes ECC code for each 512 bytes */
|
|
nand_chip->ecc.mode = NAND_ECC_HW;
|
|
nand_chip->ecc.strength = 1;
|
|
nand_chip->ecc.size = ZYNQ_NAND_ECC_SIZE;
|
|
nand_chip->ecc.bytes = 3;
|
|
nand_chip->ecc.calculate = zynq_nand_calculate_hwecc;
|
|
nand_chip->ecc.correct = zynq_nand_correct_data;
|
|
nand_chip->ecc.hwctl = NULL;
|
|
nand_chip->ecc.read_page = zynq_nand_read_page_hwecc;
|
|
nand_chip->ecc.write_page = zynq_nand_write_page_hwecc;
|
|
nand_chip->ecc.read_page_raw = zynq_nand_read_page_raw;
|
|
nand_chip->ecc.write_page_raw = zynq_nand_write_page_raw;
|
|
nand_chip->ecc.read_oob = zynq_nand_read_oob;
|
|
nand_chip->ecc.write_oob = zynq_nand_write_oob;
|
|
|
|
switch (mtd->writesize) {
|
|
case 512:
|
|
ecc_page_size = 0x1;
|
|
/* Set the ECC memory config register */
|
|
writel((ZYNQ_NAND_ECC_CONFIG | ecc_page_size),
|
|
&zynq_nand_smc_base->emcr);
|
|
break;
|
|
case 1024:
|
|
ecc_page_size = 0x2;
|
|
/* Set the ECC memory config register */
|
|
writel((ZYNQ_NAND_ECC_CONFIG | ecc_page_size),
|
|
&zynq_nand_smc_base->emcr);
|
|
break;
|
|
case 2048:
|
|
ecc_page_size = 0x3;
|
|
/* Set the ECC memory config register */
|
|
writel((ZYNQ_NAND_ECC_CONFIG | ecc_page_size),
|
|
&zynq_nand_smc_base->emcr);
|
|
break;
|
|
default:
|
|
nand_chip->ecc.mode = NAND_ECC_SOFT;
|
|
nand_chip->ecc.calculate = nand_calculate_ecc;
|
|
nand_chip->ecc.correct = nand_correct_data;
|
|
nand_chip->ecc.read_page = zynq_nand_read_page_swecc;
|
|
nand_chip->ecc.write_page = zynq_nand_write_page_swecc;
|
|
nand_chip->ecc.size = 256;
|
|
break;
|
|
}
|
|
|
|
if (mtd->oobsize == 16)
|
|
nand_chip->ecc.layout = &nand_oob_16;
|
|
else if (mtd->oobsize == 64)
|
|
nand_chip->ecc.layout = &nand_oob_64;
|
|
else
|
|
printf("%s: No oob layout found\n", __func__);
|
|
}
|
|
|
|
/* Second phase scan */
|
|
if (nand_scan_tail(mtd)) {
|
|
printf("%s: nand_scan_tail failed\n", __func__);
|
|
goto fail;
|
|
}
|
|
if (nand_register(devnum, mtd))
|
|
goto fail;
|
|
return 0;
|
|
fail:
|
|
free(xnand);
|
|
return err;
|
|
}
|
|
|
|
static struct nand_chip nand_chip[CONFIG_SYS_MAX_NAND_DEVICE];
|
|
|
|
void board_nand_init(void)
|
|
{
|
|
struct nand_chip *nand = &nand_chip[0];
|
|
|
|
if (zynq_nand_init(nand, 0))
|
|
puts("ZYNQ NAND init failed\n");
|
|
}
|