mirror of
https://github.com/brain-hackers/u-boot-brain
synced 2024-08-28 04:48:52 +09:00
![Scott Wood](/assets/img/avatar_default.png)
Updates the NAND code to match Linux v4.6. The previous sync was from
Linux v4.1 in commit d3963721d9
.
Note that none of the individual NAND drivers tracked Linux closely
enough to be synced themselves, other than manually applying a few
cross-tree changes.
Signed-off-by: Scott Wood <oss@buserror.net>
Tested-by: Heiko Schocher <hs@denx.de>
770 lines
20 KiB
C
770 lines
20 KiB
C
/*
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* Copyright 2009-2015 Freescale Semiconductor, Inc. and others
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*
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* Description: MPC5125, VF610, MCF54418 and Kinetis K70 Nand driver.
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* Ported to U-Boot by Stefan Agner
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* Based on RFC driver posted on Kernel Mailing list by Bill Pringlemeir
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* Jason ported to M54418TWR and MVFA5.
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* Authors: Stefan Agner <stefan.agner@toradex.com>
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* Bill Pringlemeir <bpringlemeir@nbsps.com>
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* Shaohui Xie <b21989@freescale.com>
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* Jason Jin <Jason.jin@freescale.com>
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*
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* Based on original driver mpc5121_nfc.c.
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*
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* SPDX-License-Identifier: GPL-2.0+
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*
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* Limitations:
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* - Untested on MPC5125 and M54418.
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* - DMA and pipelining not used.
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* - 2K pages or less.
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* - HW ECC: Only 2K page with 64+ OOB.
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* - HW ECC: Only 24 and 32-bit error correction implemented.
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*/
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#include <common.h>
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#include <malloc.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 <nand.h>
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#include <errno.h>
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#include <asm/io.h>
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/* Register Offsets */
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#define NFC_FLASH_CMD1 0x3F00
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#define NFC_FLASH_CMD2 0x3F04
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#define NFC_COL_ADDR 0x3F08
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#define NFC_ROW_ADDR 0x3F0c
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#define NFC_ROW_ADDR_INC 0x3F14
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#define NFC_FLASH_STATUS1 0x3F18
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#define NFC_FLASH_STATUS2 0x3F1c
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#define NFC_CACHE_SWAP 0x3F28
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#define NFC_SECTOR_SIZE 0x3F2c
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#define NFC_FLASH_CONFIG 0x3F30
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#define NFC_IRQ_STATUS 0x3F38
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/* Addresses for NFC MAIN RAM BUFFER areas */
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#define NFC_MAIN_AREA(n) ((n) * 0x1000)
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#define PAGE_2K 0x0800
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#define OOB_64 0x0040
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#define OOB_MAX 0x0100
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/*
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* NFC_CMD2[CODE] values. See section:
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* - 31.4.7 Flash Command Code Description, Vybrid manual
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* - 23.8.6 Flash Command Sequencer, MPC5125 manual
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*
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* Briefly these are bitmasks of controller cycles.
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*/
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#define READ_PAGE_CMD_CODE 0x7EE0
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#define READ_ONFI_PARAM_CMD_CODE 0x4860
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#define PROGRAM_PAGE_CMD_CODE 0x7FC0
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#define ERASE_CMD_CODE 0x4EC0
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#define READ_ID_CMD_CODE 0x4804
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#define RESET_CMD_CODE 0x4040
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#define STATUS_READ_CMD_CODE 0x4068
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/* NFC ECC mode define */
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#define ECC_BYPASS 0
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#define ECC_45_BYTE 6
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#define ECC_60_BYTE 7
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/*** Register Mask and bit definitions */
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/* NFC_FLASH_CMD1 Field */
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#define CMD_BYTE2_MASK 0xFF000000
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#define CMD_BYTE2_SHIFT 24
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/* NFC_FLASH_CM2 Field */
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#define CMD_BYTE1_MASK 0xFF000000
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#define CMD_BYTE1_SHIFT 24
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#define CMD_CODE_MASK 0x00FFFF00
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#define CMD_CODE_SHIFT 8
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#define BUFNO_MASK 0x00000006
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#define BUFNO_SHIFT 1
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#define START_BIT (1<<0)
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/* NFC_COL_ADDR Field */
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#define COL_ADDR_MASK 0x0000FFFF
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#define COL_ADDR_SHIFT 0
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/* NFC_ROW_ADDR Field */
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#define ROW_ADDR_MASK 0x00FFFFFF
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#define ROW_ADDR_SHIFT 0
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#define ROW_ADDR_CHIP_SEL_RB_MASK 0xF0000000
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#define ROW_ADDR_CHIP_SEL_RB_SHIFT 28
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#define ROW_ADDR_CHIP_SEL_MASK 0x0F000000
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#define ROW_ADDR_CHIP_SEL_SHIFT 24
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/* NFC_FLASH_STATUS2 Field */
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#define STATUS_BYTE1_MASK 0x000000FF
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/* NFC_FLASH_CONFIG Field */
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#define CONFIG_ECC_SRAM_ADDR_MASK 0x7FC00000
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#define CONFIG_ECC_SRAM_ADDR_SHIFT 22
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#define CONFIG_ECC_SRAM_REQ_BIT (1<<21)
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#define CONFIG_DMA_REQ_BIT (1<<20)
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#define CONFIG_ECC_MODE_MASK 0x000E0000
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#define CONFIG_ECC_MODE_SHIFT 17
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#define CONFIG_FAST_FLASH_BIT (1<<16)
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#define CONFIG_16BIT (1<<7)
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#define CONFIG_BOOT_MODE_BIT (1<<6)
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#define CONFIG_ADDR_AUTO_INCR_BIT (1<<5)
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#define CONFIG_BUFNO_AUTO_INCR_BIT (1<<4)
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#define CONFIG_PAGE_CNT_MASK 0xF
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#define CONFIG_PAGE_CNT_SHIFT 0
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/* NFC_IRQ_STATUS Field */
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#define IDLE_IRQ_BIT (1<<29)
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#define IDLE_EN_BIT (1<<20)
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#define CMD_DONE_CLEAR_BIT (1<<18)
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#define IDLE_CLEAR_BIT (1<<17)
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#define NFC_TIMEOUT (1000)
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/*
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* ECC status - seems to consume 8 bytes (double word). The documented
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* status byte is located in the lowest byte of the second word (which is
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* the 4th or 7th byte depending on endianness).
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* Calculate an offset to store the ECC status at the end of the buffer.
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*/
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#define ECC_SRAM_ADDR (PAGE_2K + OOB_MAX - 8)
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#define ECC_STATUS 0x4
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#define ECC_STATUS_MASK 0x80
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#define ECC_STATUS_ERR_COUNT 0x3F
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enum vf610_nfc_alt_buf {
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ALT_BUF_DATA = 0,
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ALT_BUF_ID = 1,
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ALT_BUF_STAT = 2,
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ALT_BUF_ONFI = 3,
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};
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struct vf610_nfc {
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struct nand_chip chip;
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void __iomem *regs;
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uint buf_offset;
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int write_sz;
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/* Status and ID are in alternate locations. */
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enum vf610_nfc_alt_buf alt_buf;
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};
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#define mtd_to_nfc(_mtd) nand_get_controller_data(mtd_to_nand(_mtd))
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#if defined(CONFIG_SYS_NAND_VF610_NFC_45_ECC_BYTES)
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#define ECC_HW_MODE ECC_45_BYTE
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static struct nand_ecclayout vf610_nfc_ecc = {
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.eccbytes = 45,
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.eccpos = {19, 20, 21, 22, 23,
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24, 25, 26, 27, 28, 29, 30, 31,
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32, 33, 34, 35, 36, 37, 38, 39,
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40, 41, 42, 43, 44, 45, 46, 47,
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48, 49, 50, 51, 52, 53, 54, 55,
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56, 57, 58, 59, 60, 61, 62, 63},
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.oobfree = {
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{.offset = 2,
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.length = 17} }
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};
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#elif defined(CONFIG_SYS_NAND_VF610_NFC_60_ECC_BYTES)
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#define ECC_HW_MODE ECC_60_BYTE
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static struct nand_ecclayout vf610_nfc_ecc = {
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.eccbytes = 60,
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.eccpos = { 4, 5, 6, 7, 8, 9, 10, 11,
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12, 13, 14, 15, 16, 17, 18, 19,
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20, 21, 22, 23, 24, 25, 26, 27,
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28, 29, 30, 31, 32, 33, 34, 35,
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36, 37, 38, 39, 40, 41, 42, 43,
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44, 45, 46, 47, 48, 49, 50, 51,
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52, 53, 54, 55, 56, 57, 58, 59,
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60, 61, 62, 63 },
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.oobfree = {
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{.offset = 2,
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.length = 2} }
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};
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#endif
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static inline u32 vf610_nfc_read(struct mtd_info *mtd, uint reg)
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{
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struct vf610_nfc *nfc = mtd_to_nfc(mtd);
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return readl(nfc->regs + reg);
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}
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static inline void vf610_nfc_write(struct mtd_info *mtd, uint reg, u32 val)
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{
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struct vf610_nfc *nfc = mtd_to_nfc(mtd);
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writel(val, nfc->regs + reg);
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}
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static inline void vf610_nfc_set(struct mtd_info *mtd, uint reg, u32 bits)
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{
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vf610_nfc_write(mtd, reg, vf610_nfc_read(mtd, reg) | bits);
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}
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static inline void vf610_nfc_clear(struct mtd_info *mtd, uint reg, u32 bits)
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{
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vf610_nfc_write(mtd, reg, vf610_nfc_read(mtd, reg) & ~bits);
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}
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static inline void vf610_nfc_set_field(struct mtd_info *mtd, u32 reg,
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u32 mask, u32 shift, u32 val)
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{
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vf610_nfc_write(mtd, reg,
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(vf610_nfc_read(mtd, reg) & (~mask)) | val << shift);
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}
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static inline void vf610_nfc_memcpy(void *dst, const void *src, size_t n)
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{
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/*
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* Use this accessor for the internal SRAM buffers. On the ARM
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* Freescale Vybrid SoC it's known that the driver can treat
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* the SRAM buffer as if it's memory. Other platform might need
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* to treat the buffers differently.
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*
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* For the time being, use memcpy
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*/
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memcpy(dst, src, n);
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}
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/* Clear flags for upcoming command */
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static inline void vf610_nfc_clear_status(void __iomem *regbase)
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{
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void __iomem *reg = regbase + NFC_IRQ_STATUS;
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u32 tmp = __raw_readl(reg);
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tmp |= CMD_DONE_CLEAR_BIT | IDLE_CLEAR_BIT;
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__raw_writel(tmp, reg);
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}
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/* Wait for complete operation */
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static void vf610_nfc_done(struct mtd_info *mtd)
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{
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struct vf610_nfc *nfc = mtd_to_nfc(mtd);
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uint start;
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/*
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* Barrier is needed after this write. This write need
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* to be done before reading the next register the first
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* time.
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* vf610_nfc_set implicates such a barrier by using writel
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* to write to the register.
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*/
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vf610_nfc_set(mtd, NFC_FLASH_CMD2, START_BIT);
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start = get_timer(0);
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while (!(vf610_nfc_read(mtd, NFC_IRQ_STATUS) & IDLE_IRQ_BIT)) {
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if (get_timer(start) > NFC_TIMEOUT) {
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printf("Timeout while waiting for IDLE.\n");
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return;
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}
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}
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vf610_nfc_clear_status(nfc->regs);
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}
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static u8 vf610_nfc_get_id(struct mtd_info *mtd, int col)
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{
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u32 flash_id;
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if (col < 4) {
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flash_id = vf610_nfc_read(mtd, NFC_FLASH_STATUS1);
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flash_id >>= (3 - col) * 8;
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} else {
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flash_id = vf610_nfc_read(mtd, NFC_FLASH_STATUS2);
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flash_id >>= 24;
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}
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return flash_id & 0xff;
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}
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static u8 vf610_nfc_get_status(struct mtd_info *mtd)
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{
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return vf610_nfc_read(mtd, NFC_FLASH_STATUS2) & STATUS_BYTE1_MASK;
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}
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/* Single command */
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static void vf610_nfc_send_command(void __iomem *regbase, u32 cmd_byte1,
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u32 cmd_code)
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{
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void __iomem *reg = regbase + NFC_FLASH_CMD2;
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u32 tmp;
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vf610_nfc_clear_status(regbase);
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tmp = __raw_readl(reg);
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tmp &= ~(CMD_BYTE1_MASK | CMD_CODE_MASK | BUFNO_MASK);
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tmp |= cmd_byte1 << CMD_BYTE1_SHIFT;
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tmp |= cmd_code << CMD_CODE_SHIFT;
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__raw_writel(tmp, reg);
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}
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/* Two commands */
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static void vf610_nfc_send_commands(void __iomem *regbase, u32 cmd_byte1,
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u32 cmd_byte2, u32 cmd_code)
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{
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void __iomem *reg = regbase + NFC_FLASH_CMD1;
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u32 tmp;
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vf610_nfc_send_command(regbase, cmd_byte1, cmd_code);
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tmp = __raw_readl(reg);
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tmp &= ~CMD_BYTE2_MASK;
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tmp |= cmd_byte2 << CMD_BYTE2_SHIFT;
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__raw_writel(tmp, reg);
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}
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static void vf610_nfc_addr_cycle(struct mtd_info *mtd, int column, int page)
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{
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if (column != -1) {
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struct vf610_nfc *nfc = mtd_to_nfc(mtd);
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if (nfc->chip.options & NAND_BUSWIDTH_16)
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column = column / 2;
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vf610_nfc_set_field(mtd, NFC_COL_ADDR, COL_ADDR_MASK,
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COL_ADDR_SHIFT, column);
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}
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if (page != -1)
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vf610_nfc_set_field(mtd, NFC_ROW_ADDR, ROW_ADDR_MASK,
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ROW_ADDR_SHIFT, page);
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}
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static inline void vf610_nfc_ecc_mode(struct mtd_info *mtd, int ecc_mode)
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{
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vf610_nfc_set_field(mtd, NFC_FLASH_CONFIG,
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CONFIG_ECC_MODE_MASK,
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CONFIG_ECC_MODE_SHIFT, ecc_mode);
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}
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static inline void vf610_nfc_transfer_size(void __iomem *regbase, int size)
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{
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__raw_writel(size, regbase + NFC_SECTOR_SIZE);
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}
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/* Send command to NAND chip */
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static void vf610_nfc_command(struct mtd_info *mtd, unsigned command,
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int column, int page)
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{
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struct vf610_nfc *nfc = mtd_to_nfc(mtd);
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int trfr_sz = nfc->chip.options & NAND_BUSWIDTH_16 ? 1 : 0;
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nfc->buf_offset = max(column, 0);
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nfc->alt_buf = ALT_BUF_DATA;
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switch (command) {
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case NAND_CMD_SEQIN:
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/* Use valid column/page from preread... */
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vf610_nfc_addr_cycle(mtd, column, page);
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nfc->buf_offset = 0;
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/*
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* SEQIN => data => PAGEPROG sequence is done by the controller
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* hence we do not need to issue the command here...
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*/
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return;
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case NAND_CMD_PAGEPROG:
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trfr_sz += nfc->write_sz;
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vf610_nfc_ecc_mode(mtd, ECC_HW_MODE);
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vf610_nfc_transfer_size(nfc->regs, trfr_sz);
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vf610_nfc_send_commands(nfc->regs, NAND_CMD_SEQIN,
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command, PROGRAM_PAGE_CMD_CODE);
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break;
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case NAND_CMD_RESET:
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vf610_nfc_transfer_size(nfc->regs, 0);
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vf610_nfc_send_command(nfc->regs, command, RESET_CMD_CODE);
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break;
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case NAND_CMD_READOOB:
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trfr_sz += mtd->oobsize;
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column = mtd->writesize;
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vf610_nfc_transfer_size(nfc->regs, trfr_sz);
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vf610_nfc_send_commands(nfc->regs, NAND_CMD_READ0,
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NAND_CMD_READSTART, READ_PAGE_CMD_CODE);
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vf610_nfc_addr_cycle(mtd, column, page);
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vf610_nfc_ecc_mode(mtd, ECC_BYPASS);
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break;
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case NAND_CMD_READ0:
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trfr_sz += mtd->writesize + mtd->oobsize;
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vf610_nfc_transfer_size(nfc->regs, trfr_sz);
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vf610_nfc_ecc_mode(mtd, ECC_HW_MODE);
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vf610_nfc_send_commands(nfc->regs, NAND_CMD_READ0,
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NAND_CMD_READSTART, READ_PAGE_CMD_CODE);
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vf610_nfc_addr_cycle(mtd, column, page);
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break;
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case NAND_CMD_PARAM:
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nfc->alt_buf = ALT_BUF_ONFI;
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trfr_sz = 3 * sizeof(struct nand_onfi_params);
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vf610_nfc_transfer_size(nfc->regs, trfr_sz);
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vf610_nfc_send_command(nfc->regs, NAND_CMD_PARAM,
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READ_ONFI_PARAM_CMD_CODE);
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vf610_nfc_set_field(mtd, NFC_ROW_ADDR, ROW_ADDR_MASK,
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ROW_ADDR_SHIFT, column);
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vf610_nfc_ecc_mode(mtd, ECC_BYPASS);
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break;
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case NAND_CMD_ERASE1:
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vf610_nfc_transfer_size(nfc->regs, 0);
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vf610_nfc_send_commands(nfc->regs, command,
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NAND_CMD_ERASE2, ERASE_CMD_CODE);
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vf610_nfc_addr_cycle(mtd, column, page);
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break;
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case NAND_CMD_READID:
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nfc->alt_buf = ALT_BUF_ID;
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nfc->buf_offset = 0;
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vf610_nfc_transfer_size(nfc->regs, 0);
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vf610_nfc_send_command(nfc->regs, command, READ_ID_CMD_CODE);
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vf610_nfc_set_field(mtd, NFC_ROW_ADDR, ROW_ADDR_MASK,
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ROW_ADDR_SHIFT, column);
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break;
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case NAND_CMD_STATUS:
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nfc->alt_buf = ALT_BUF_STAT;
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vf610_nfc_transfer_size(nfc->regs, 0);
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vf610_nfc_send_command(nfc->regs, command, STATUS_READ_CMD_CODE);
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break;
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default:
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return;
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}
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vf610_nfc_done(mtd);
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nfc->write_sz = 0;
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}
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/* Read data from NFC buffers */
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static void vf610_nfc_read_buf(struct mtd_info *mtd, u_char *buf, int len)
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{
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struct vf610_nfc *nfc = mtd_to_nfc(mtd);
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uint c = nfc->buf_offset;
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/* Alternate buffers are only supported through read_byte */
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if (nfc->alt_buf)
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return;
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vf610_nfc_memcpy(buf, nfc->regs + NFC_MAIN_AREA(0) + c, len);
|
|
|
|
nfc->buf_offset += len;
|
|
}
|
|
|
|
/* Write data to NFC buffers */
|
|
static void vf610_nfc_write_buf(struct mtd_info *mtd, const uint8_t *buf,
|
|
int len)
|
|
{
|
|
struct vf610_nfc *nfc = mtd_to_nfc(mtd);
|
|
uint c = nfc->buf_offset;
|
|
uint l;
|
|
|
|
l = min_t(uint, len, mtd->writesize + mtd->oobsize - c);
|
|
vf610_nfc_memcpy(nfc->regs + NFC_MAIN_AREA(0) + c, buf, l);
|
|
|
|
nfc->write_sz += l;
|
|
nfc->buf_offset += l;
|
|
}
|
|
|
|
/* Read byte from NFC buffers */
|
|
static uint8_t vf610_nfc_read_byte(struct mtd_info *mtd)
|
|
{
|
|
struct vf610_nfc *nfc = mtd_to_nfc(mtd);
|
|
u8 tmp;
|
|
uint c = nfc->buf_offset;
|
|
|
|
switch (nfc->alt_buf) {
|
|
case ALT_BUF_ID:
|
|
tmp = vf610_nfc_get_id(mtd, c);
|
|
break;
|
|
case ALT_BUF_STAT:
|
|
tmp = vf610_nfc_get_status(mtd);
|
|
break;
|
|
#ifdef __LITTLE_ENDIAN
|
|
case ALT_BUF_ONFI:
|
|
/* Reverse byte since the controller uses big endianness */
|
|
c = nfc->buf_offset ^ 0x3;
|
|
/* fall-through */
|
|
#endif
|
|
default:
|
|
tmp = *((u8 *)(nfc->regs + NFC_MAIN_AREA(0) + c));
|
|
break;
|
|
}
|
|
nfc->buf_offset++;
|
|
return tmp;
|
|
}
|
|
|
|
/* Read word from NFC buffers */
|
|
static u16 vf610_nfc_read_word(struct mtd_info *mtd)
|
|
{
|
|
u16 tmp;
|
|
|
|
vf610_nfc_read_buf(mtd, (u_char *)&tmp, sizeof(tmp));
|
|
return tmp;
|
|
}
|
|
|
|
/* If not provided, upper layers apply a fixed delay. */
|
|
static int vf610_nfc_dev_ready(struct mtd_info *mtd)
|
|
{
|
|
/* NFC handles R/B internally; always ready. */
|
|
return 1;
|
|
}
|
|
|
|
/*
|
|
* This function supports Vybrid only (MPC5125 would have full RB and four CS)
|
|
*/
|
|
static void vf610_nfc_select_chip(struct mtd_info *mtd, int chip)
|
|
{
|
|
#ifdef CONFIG_VF610
|
|
u32 tmp = vf610_nfc_read(mtd, NFC_ROW_ADDR);
|
|
tmp &= ~(ROW_ADDR_CHIP_SEL_RB_MASK | ROW_ADDR_CHIP_SEL_MASK);
|
|
|
|
if (chip >= 0) {
|
|
tmp |= 1 << ROW_ADDR_CHIP_SEL_RB_SHIFT;
|
|
tmp |= (1 << chip) << ROW_ADDR_CHIP_SEL_SHIFT;
|
|
}
|
|
|
|
vf610_nfc_write(mtd, NFC_ROW_ADDR, tmp);
|
|
#endif
|
|
}
|
|
|
|
/* Count the number of 0's in buff upto max_bits */
|
|
static inline int count_written_bits(uint8_t *buff, int size, int max_bits)
|
|
{
|
|
uint32_t *buff32 = (uint32_t *)buff;
|
|
int k, written_bits = 0;
|
|
|
|
for (k = 0; k < (size / 4); k++) {
|
|
written_bits += hweight32(~buff32[k]);
|
|
if (written_bits > max_bits)
|
|
break;
|
|
}
|
|
|
|
return written_bits;
|
|
}
|
|
|
|
static inline int vf610_nfc_correct_data(struct mtd_info *mtd, uint8_t *dat,
|
|
uint8_t *oob, int page)
|
|
{
|
|
struct vf610_nfc *nfc = mtd_to_nfc(mtd);
|
|
u32 ecc_status_off = NFC_MAIN_AREA(0) + ECC_SRAM_ADDR + ECC_STATUS;
|
|
u8 ecc_status;
|
|
u8 ecc_count;
|
|
int flips;
|
|
int flips_threshold = nfc->chip.ecc.strength / 2;
|
|
|
|
ecc_status = vf610_nfc_read(mtd, ecc_status_off) & 0xff;
|
|
ecc_count = ecc_status & ECC_STATUS_ERR_COUNT;
|
|
|
|
if (!(ecc_status & ECC_STATUS_MASK))
|
|
return ecc_count;
|
|
|
|
/* Read OOB without ECC unit enabled */
|
|
vf610_nfc_command(mtd, NAND_CMD_READOOB, 0, page);
|
|
vf610_nfc_read_buf(mtd, oob, mtd->oobsize);
|
|
|
|
/*
|
|
* On an erased page, bit count (including OOB) should be zero or
|
|
* at least less then half of the ECC strength.
|
|
*/
|
|
flips = count_written_bits(dat, nfc->chip.ecc.size, flips_threshold);
|
|
flips += count_written_bits(oob, mtd->oobsize, flips_threshold);
|
|
|
|
if (unlikely(flips > flips_threshold))
|
|
return -EINVAL;
|
|
|
|
/* Erased page. */
|
|
memset(dat, 0xff, nfc->chip.ecc.size);
|
|
memset(oob, 0xff, mtd->oobsize);
|
|
return flips;
|
|
}
|
|
|
|
static int vf610_nfc_read_page(struct mtd_info *mtd, struct nand_chip *chip,
|
|
uint8_t *buf, int oob_required, int page)
|
|
{
|
|
int eccsize = chip->ecc.size;
|
|
int stat;
|
|
|
|
vf610_nfc_read_buf(mtd, buf, eccsize);
|
|
if (oob_required)
|
|
vf610_nfc_read_buf(mtd, chip->oob_poi, mtd->oobsize);
|
|
|
|
stat = vf610_nfc_correct_data(mtd, buf, chip->oob_poi, page);
|
|
|
|
if (stat < 0) {
|
|
mtd->ecc_stats.failed++;
|
|
return 0;
|
|
} else {
|
|
mtd->ecc_stats.corrected += stat;
|
|
return stat;
|
|
}
|
|
}
|
|
|
|
/*
|
|
* ECC will be calculated automatically
|
|
*/
|
|
static int vf610_nfc_write_page(struct mtd_info *mtd, struct nand_chip *chip,
|
|
const uint8_t *buf, int oob_required, int page)
|
|
{
|
|
struct vf610_nfc *nfc = mtd_to_nfc(mtd);
|
|
|
|
vf610_nfc_write_buf(mtd, buf, mtd->writesize);
|
|
if (oob_required)
|
|
vf610_nfc_write_buf(mtd, chip->oob_poi, mtd->oobsize);
|
|
|
|
/* Always write whole page including OOB due to HW ECC */
|
|
nfc->write_sz = mtd->writesize + mtd->oobsize;
|
|
|
|
return 0;
|
|
}
|
|
|
|
struct vf610_nfc_config {
|
|
int hardware_ecc;
|
|
int width;
|
|
int flash_bbt;
|
|
};
|
|
|
|
static int vf610_nfc_nand_init(int devnum, void __iomem *addr)
|
|
{
|
|
struct mtd_info *mtd;
|
|
struct nand_chip *chip;
|
|
struct vf610_nfc *nfc;
|
|
int err = 0;
|
|
struct vf610_nfc_config cfg = {
|
|
.hardware_ecc = 1,
|
|
#ifdef CONFIG_SYS_NAND_BUSWIDTH_16BIT
|
|
.width = 16,
|
|
#else
|
|
.width = 8,
|
|
#endif
|
|
.flash_bbt = 1,
|
|
};
|
|
|
|
nfc = malloc(sizeof(*nfc));
|
|
if (!nfc) {
|
|
printf(KERN_ERR "%s: Memory exhausted!\n", __func__);
|
|
return -ENOMEM;
|
|
}
|
|
|
|
chip = &nfc->chip;
|
|
nfc->regs = addr;
|
|
|
|
mtd = nand_to_mtd(chip);
|
|
nand_set_controller_data(chip, nfc);
|
|
|
|
if (cfg.width == 16)
|
|
chip->options |= NAND_BUSWIDTH_16;
|
|
|
|
chip->dev_ready = vf610_nfc_dev_ready;
|
|
chip->cmdfunc = vf610_nfc_command;
|
|
chip->read_byte = vf610_nfc_read_byte;
|
|
chip->read_word = vf610_nfc_read_word;
|
|
chip->read_buf = vf610_nfc_read_buf;
|
|
chip->write_buf = vf610_nfc_write_buf;
|
|
chip->select_chip = vf610_nfc_select_chip;
|
|
|
|
chip->options |= NAND_NO_SUBPAGE_WRITE;
|
|
|
|
chip->ecc.size = PAGE_2K;
|
|
|
|
/* Set configuration register. */
|
|
vf610_nfc_clear(mtd, NFC_FLASH_CONFIG, CONFIG_16BIT);
|
|
vf610_nfc_clear(mtd, NFC_FLASH_CONFIG, CONFIG_ADDR_AUTO_INCR_BIT);
|
|
vf610_nfc_clear(mtd, NFC_FLASH_CONFIG, CONFIG_BUFNO_AUTO_INCR_BIT);
|
|
vf610_nfc_clear(mtd, NFC_FLASH_CONFIG, CONFIG_BOOT_MODE_BIT);
|
|
vf610_nfc_clear(mtd, NFC_FLASH_CONFIG, CONFIG_DMA_REQ_BIT);
|
|
vf610_nfc_set(mtd, NFC_FLASH_CONFIG, CONFIG_FAST_FLASH_BIT);
|
|
|
|
/* Disable virtual pages, only one elementary transfer unit */
|
|
vf610_nfc_set_field(mtd, NFC_FLASH_CONFIG, CONFIG_PAGE_CNT_MASK,
|
|
CONFIG_PAGE_CNT_SHIFT, 1);
|
|
|
|
/* first scan to find the device and get the page size */
|
|
if (nand_scan_ident(mtd, CONFIG_SYS_MAX_NAND_DEVICE, NULL)) {
|
|
err = -ENXIO;
|
|
goto error;
|
|
}
|
|
|
|
if (cfg.width == 16)
|
|
vf610_nfc_set(mtd, NFC_FLASH_CONFIG, CONFIG_16BIT);
|
|
|
|
/* Bad block options. */
|
|
if (cfg.flash_bbt)
|
|
chip->bbt_options = NAND_BBT_USE_FLASH | NAND_BBT_NO_OOB |
|
|
NAND_BBT_CREATE;
|
|
|
|
/* Single buffer only, max 256 OOB minus ECC status */
|
|
if (mtd->writesize + mtd->oobsize > PAGE_2K + OOB_MAX - 8) {
|
|
dev_err(nfc->dev, "Unsupported flash page size\n");
|
|
err = -ENXIO;
|
|
goto error;
|
|
}
|
|
|
|
if (cfg.hardware_ecc) {
|
|
if (mtd->writesize != PAGE_2K && mtd->oobsize < 64) {
|
|
dev_err(nfc->dev, "Unsupported flash with hwecc\n");
|
|
err = -ENXIO;
|
|
goto error;
|
|
}
|
|
|
|
if (chip->ecc.size != mtd->writesize) {
|
|
dev_err(nfc->dev, "ecc size: %d\n", chip->ecc.size);
|
|
dev_err(nfc->dev, "Step size needs to be page size\n");
|
|
err = -ENXIO;
|
|
goto error;
|
|
}
|
|
|
|
/* Current HW ECC layouts only use 64 bytes of OOB */
|
|
if (mtd->oobsize > 64)
|
|
mtd->oobsize = 64;
|
|
|
|
/* propagate ecc.layout to mtd_info */
|
|
mtd->ecclayout = chip->ecc.layout;
|
|
chip->ecc.read_page = vf610_nfc_read_page;
|
|
chip->ecc.write_page = vf610_nfc_write_page;
|
|
chip->ecc.mode = NAND_ECC_HW;
|
|
|
|
chip->ecc.size = PAGE_2K;
|
|
chip->ecc.layout = &vf610_nfc_ecc;
|
|
#if defined(CONFIG_SYS_NAND_VF610_NFC_45_ECC_BYTES)
|
|
chip->ecc.strength = 24;
|
|
chip->ecc.bytes = 45;
|
|
#elif defined(CONFIG_SYS_NAND_VF610_NFC_60_ECC_BYTES)
|
|
chip->ecc.strength = 32;
|
|
chip->ecc.bytes = 60;
|
|
#endif
|
|
|
|
/* Set ECC_STATUS offset */
|
|
vf610_nfc_set_field(mtd, NFC_FLASH_CONFIG,
|
|
CONFIG_ECC_SRAM_ADDR_MASK,
|
|
CONFIG_ECC_SRAM_ADDR_SHIFT,
|
|
ECC_SRAM_ADDR >> 3);
|
|
|
|
/* Enable ECC status in SRAM */
|
|
vf610_nfc_set(mtd, NFC_FLASH_CONFIG, CONFIG_ECC_SRAM_REQ_BIT);
|
|
}
|
|
|
|
/* second phase scan */
|
|
err = nand_scan_tail(mtd);
|
|
if (err)
|
|
return err;
|
|
|
|
err = nand_register(devnum, mtd);
|
|
if (err)
|
|
return err;
|
|
|
|
return 0;
|
|
|
|
error:
|
|
return err;
|
|
}
|
|
|
|
void board_nand_init(void)
|
|
{
|
|
int err = vf610_nfc_nand_init(0, (void __iomem *)CONFIG_SYS_NAND_BASE);
|
|
if (err)
|
|
printf("VF610 NAND init failed (err %d)\n", err);
|
|
}
|