+++ /dev/null
-/*
- * Platform independend driver for JZ4740.
- *
- * Copyright (c) 2007 Ingenic Semiconductor Inc.
- * Author: <jlwei@ingenic.cn>
- *
- * SPDX-License-Identifier: GPL-2.0+
- */
-#include <common.h>
-
-#include <nand.h>
-#include <asm/io.h>
-#include <asm/jz4740.h>
-
-#define JZ_NAND_DATA_ADDR ((void __iomem *)0xB8000000)
-#define JZ_NAND_CMD_ADDR (JZ_NAND_DATA_ADDR + 0x8000)
-#define JZ_NAND_ADDR_ADDR (JZ_NAND_DATA_ADDR + 0x10000)
-
-#define JZ_NAND_ECC_CTRL_ENCODING BIT(3)
-#define JZ_NAND_ECC_CTRL_RS BIT(2)
-#define JZ_NAND_ECC_CTRL_RESET BIT(1)
-#define JZ_NAND_ECC_CTRL_ENABLE BIT(0)
-
-#define EMC_SMCR1_OPT_NAND 0x094c4400
-/* Optimize the timing of nand */
-
-static struct jz4740_emc * emc = (struct jz4740_emc *)JZ4740_EMC_BASE;
-
-static struct nand_ecclayout qi_lb60_ecclayout_2gb = {
- .eccbytes = 72,
- .eccpos = {
- 12, 13, 14, 15, 16, 17, 18, 19,
- 20, 21, 22, 23, 24, 25, 26, 27,
- 28, 29, 30, 31, 32, 33, 34, 35,
- 36, 37, 38, 39, 40, 41, 42, 43,
- 44, 45, 46, 47, 48, 49, 50, 51,
- 52, 53, 54, 55, 56, 57, 58, 59,
- 60, 61, 62, 63, 64, 65, 66, 67,
- 68, 69, 70, 71, 72, 73, 74, 75,
- 76, 77, 78, 79, 80, 81, 82, 83 },
- .oobfree = {
- {.offset = 2,
- .length = 10 },
- {.offset = 84,
- .length = 44 } }
-};
-
-static int is_reading;
-
-static void jz_nand_cmd_ctrl(struct mtd_info *mtd, int cmd, unsigned int ctrl)
-{
- struct nand_chip *this = mtd->priv;
- uint32_t reg;
-
- if (ctrl & NAND_CTRL_CHANGE) {
- if (ctrl & NAND_ALE)
- this->IO_ADDR_W = JZ_NAND_ADDR_ADDR;
- else if (ctrl & NAND_CLE)
- this->IO_ADDR_W = JZ_NAND_CMD_ADDR;
- else
- this->IO_ADDR_W = JZ_NAND_DATA_ADDR;
-
- reg = readl(&emc->nfcsr);
- if (ctrl & NAND_NCE)
- reg |= EMC_NFCSR_NFCE1;
- else
- reg &= ~EMC_NFCSR_NFCE1;
- writel(reg, &emc->nfcsr);
- }
-
- if (cmd != NAND_CMD_NONE)
- writeb(cmd, this->IO_ADDR_W);
-}
-
-static int jz_nand_device_ready(struct mtd_info *mtd)
-{
- return (readl(GPIO_PXPIN(2)) & 0x40000000) ? 1 : 0;
-}
-
-void board_nand_select_device(struct nand_chip *nand, int chip)
-{
- /*
- * Don't use "chip" to address the NAND device,
- * generate the cs from the address where it is encoded.
- */
-}
-
-static int jz_nand_rs_calculate_ecc(struct mtd_info *mtd, const u_char *dat,
- u_char *ecc_code)
-{
- uint32_t status;
- int i;
-
- if (is_reading)
- return 0;
-
- do {
- status = readl(&emc->nfints);
- } while (!(status & EMC_NFINTS_ENCF));
-
- /* disable ecc */
- writel(readl(&emc->nfecr) & ~EMC_NFECR_ECCE, &emc->nfecr);
-
- for (i = 0; i < 9; i++)
- ecc_code[i] = readb(&emc->nfpar[i]);
-
- return 0;
-}
-
-static void jz_nand_hwctl(struct mtd_info *mtd, int mode)
-{
- uint32_t reg;
-
- writel(0, &emc->nfints);
- reg = readl(&emc->nfecr);
- reg |= JZ_NAND_ECC_CTRL_RESET;
- reg |= JZ_NAND_ECC_CTRL_ENABLE;
- reg |= JZ_NAND_ECC_CTRL_RS;
-
- switch (mode) {
- case NAND_ECC_READ:
- reg &= ~JZ_NAND_ECC_CTRL_ENCODING;
- is_reading = 1;
- break;
- case NAND_ECC_WRITE:
- reg |= JZ_NAND_ECC_CTRL_ENCODING;
- is_reading = 0;
- break;
- default:
- break;
- }
-
- writel(reg, &emc->nfecr);
-}
-
-/* Correct 1~9-bit errors in 512-bytes data */
-static void jz_rs_correct(unsigned char *dat, int idx, int mask)
-{
- int i;
-
- idx--;
-
- i = idx + (idx >> 3);
- if (i >= 512)
- return;
-
- mask <<= (idx & 0x7);
-
- dat[i] ^= mask & 0xff;
- if (i < 511)
- dat[i + 1] ^= (mask >> 8) & 0xff;
-}
-
-static int jz_nand_rs_correct_data(struct mtd_info *mtd, u_char *dat,
- u_char *read_ecc, u_char *calc_ecc)
-{
- int k;
- uint32_t errcnt, index, mask, status;
-
- /* Set PAR values */
- const uint8_t all_ff_ecc[] = {
- 0xcd, 0x9d, 0x90, 0x58, 0xf4, 0x8b, 0xff, 0xb7, 0x6f };
-
- if (read_ecc[0] == 0xff && read_ecc[1] == 0xff &&
- read_ecc[2] == 0xff && read_ecc[3] == 0xff &&
- read_ecc[4] == 0xff && read_ecc[5] == 0xff &&
- read_ecc[6] == 0xff && read_ecc[7] == 0xff &&
- read_ecc[8] == 0xff) {
- for (k = 0; k < 9; k++)
- writeb(all_ff_ecc[k], &emc->nfpar[k]);
- } else {
- for (k = 0; k < 9; k++)
- writeb(read_ecc[k], &emc->nfpar[k]);
- }
- /* Set PRDY */
- writel(readl(&emc->nfecr) | EMC_NFECR_PRDY, &emc->nfecr);
-
- /* Wait for completion */
- do {
- status = readl(&emc->nfints);
- } while (!(status & EMC_NFINTS_DECF));
-
- /* disable ecc */
- writel(readl(&emc->nfecr) & ~EMC_NFECR_ECCE, &emc->nfecr);
-
- /* Check decoding */
- if (!(status & EMC_NFINTS_ERR))
- return 0;
-
- if (status & EMC_NFINTS_UNCOR) {
- printf("uncorrectable ecc\n");
- return -1;
- }
-
- errcnt = (status & EMC_NFINTS_ERRCNT_MASK) >> EMC_NFINTS_ERRCNT_BIT;
-
- switch (errcnt) {
- case 4:
- index = (readl(&emc->nferr[3]) & EMC_NFERR_INDEX_MASK) >>
- EMC_NFERR_INDEX_BIT;
- mask = (readl(&emc->nferr[3]) & EMC_NFERR_MASK_MASK) >>
- EMC_NFERR_MASK_BIT;
- jz_rs_correct(dat, index, mask);
- case 3:
- index = (readl(&emc->nferr[2]) & EMC_NFERR_INDEX_MASK) >>
- EMC_NFERR_INDEX_BIT;
- mask = (readl(&emc->nferr[2]) & EMC_NFERR_MASK_MASK) >>
- EMC_NFERR_MASK_BIT;
- jz_rs_correct(dat, index, mask);
- case 2:
- index = (readl(&emc->nferr[1]) & EMC_NFERR_INDEX_MASK) >>
- EMC_NFERR_INDEX_BIT;
- mask = (readl(&emc->nferr[1]) & EMC_NFERR_MASK_MASK) >>
- EMC_NFERR_MASK_BIT;
- jz_rs_correct(dat, index, mask);
- case 1:
- index = (readl(&emc->nferr[0]) & EMC_NFERR_INDEX_MASK) >>
- EMC_NFERR_INDEX_BIT;
- mask = (readl(&emc->nferr[0]) & EMC_NFERR_MASK_MASK) >>
- EMC_NFERR_MASK_BIT;
- jz_rs_correct(dat, index, mask);
- default:
- break;
- }
-
- return errcnt;
-}
-
-/*
- * Main initialization routine
- */
-int board_nand_init(struct nand_chip *nand)
-{
- uint32_t reg;
-
- reg = readl(&emc->nfcsr);
- reg |= EMC_NFCSR_NFE1; /* EMC setup, Set NFE bit */
- writel(reg, &emc->nfcsr);
-
- writel(EMC_SMCR1_OPT_NAND, &emc->smcr[1]);
-
- nand->IO_ADDR_R = JZ_NAND_DATA_ADDR;
- nand->IO_ADDR_W = JZ_NAND_DATA_ADDR;
- nand->cmd_ctrl = jz_nand_cmd_ctrl;
- nand->dev_ready = jz_nand_device_ready;
- nand->ecc.hwctl = jz_nand_hwctl;
- nand->ecc.correct = jz_nand_rs_correct_data;
- nand->ecc.calculate = jz_nand_rs_calculate_ecc;
- nand->ecc.mode = NAND_ECC_HW_OOB_FIRST;
- nand->ecc.size = CONFIG_SYS_NAND_ECCSIZE;
- nand->ecc.bytes = CONFIG_SYS_NAND_ECCBYTES;
- nand->ecc.strength = 4;
- nand->ecc.layout = &qi_lb60_ecclayout_2gb;
- nand->chip_delay = 50;
- nand->bbt_options |= NAND_BBT_USE_FLASH;
-
- return 0;
-}
projects / u-boot.git / commitdiff