+++ /dev/null
-/*
- * (C) Copyright 2006-2008
- * Stefan Roese, DENX Software Engineering, sr@denx.de.
- *
- * SPDX-License-Identifier: GPL-2.0+
- */
-
-#include <common.h>
-#include <nand.h>
-#include <asm/io.h>
-
-static int nand_ecc_pos[] = CONFIG_SYS_NAND_ECCPOS;
-
-#define ECCSTEPS (CONFIG_SYS_NAND_PAGE_SIZE / \
- CONFIG_SYS_NAND_ECCSIZE)
-#define ECCTOTAL (ECCSTEPS * CONFIG_SYS_NAND_ECCBYTES)
-
-
-#if (CONFIG_SYS_NAND_PAGE_SIZE <= 512)
-/*
- * NAND command for small page NAND devices (512)
- */
-static int nand_command(struct mtd_info *mtd, int block, int page, int offs, u8 cmd)
-{
- struct nand_chip *this = mtd->priv;
- int page_addr = page + block * CONFIG_SYS_NAND_PAGE_COUNT;
-
- while (!this->dev_ready(mtd))
- ;
-
- /* Begin command latch cycle */
- this->cmd_ctrl(mtd, cmd, NAND_CTRL_CLE | NAND_CTRL_CHANGE);
- /* Set ALE and clear CLE to start address cycle */
- /* Column address */
- this->cmd_ctrl(mtd, offs, NAND_CTRL_ALE | NAND_CTRL_CHANGE);
- this->cmd_ctrl(mtd, page_addr & 0xff, NAND_CTRL_ALE); /* A[16:9] */
- this->cmd_ctrl(mtd, (page_addr >> 8) & 0xff,
- NAND_CTRL_ALE); /* A[24:17] */
-#ifdef CONFIG_SYS_NAND_4_ADDR_CYCLE
- /* One more address cycle for devices > 32MiB */
- this->cmd_ctrl(mtd, (page_addr >> 16) & 0x0f,
- NAND_CTRL_ALE); /* A[28:25] */
-#endif
- /* Latch in address */
- this->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE);
-
- /*
- * Wait a while for the data to be ready
- */
- while (!this->dev_ready(mtd))
- ;
-
- return 0;
-}
-#else
-/*
- * NAND command for large page NAND devices (2k)
- */
-static int nand_command(struct mtd_info *mtd, int block, int page, int offs, u8 cmd)
-{
- struct nand_chip *this = mtd->priv;
- int page_addr = page + block * CONFIG_SYS_NAND_PAGE_COUNT;
- void (*hwctrl)(struct mtd_info *mtd, int cmd,
- unsigned int ctrl) = this->cmd_ctrl;
-
- while (!this->dev_ready(mtd))
- ;
-
- /* Emulate NAND_CMD_READOOB */
- if (cmd == NAND_CMD_READOOB) {
- offs += CONFIG_SYS_NAND_PAGE_SIZE;
- cmd = NAND_CMD_READ0;
- }
-
- /* Shift the offset from byte addressing to word addressing. */
- if (this->options & NAND_BUSWIDTH_16)
- offs >>= 1;
-
- /* Begin command latch cycle */
- hwctrl(mtd, cmd, NAND_CTRL_CLE | NAND_CTRL_CHANGE);
- /* Set ALE and clear CLE to start address cycle */
- /* Column address */
- hwctrl(mtd, offs & 0xff,
- NAND_CTRL_ALE | NAND_CTRL_CHANGE); /* A[7:0] */
- hwctrl(mtd, (offs >> 8) & 0xff, NAND_CTRL_ALE); /* A[11:9] */
- /* Row address */
- hwctrl(mtd, (page_addr & 0xff), NAND_CTRL_ALE); /* A[19:12] */
- hwctrl(mtd, ((page_addr >> 8) & 0xff),
- NAND_CTRL_ALE); /* A[27:20] */
-#ifdef CONFIG_SYS_NAND_5_ADDR_CYCLE
- /* One more address cycle for devices > 128MiB */
- hwctrl(mtd, (page_addr >> 16) & 0x0f,
- NAND_CTRL_ALE); /* A[31:28] */
-#endif
- /* Latch in address */
- hwctrl(mtd, NAND_CMD_READSTART,
- NAND_CTRL_CLE | NAND_CTRL_CHANGE);
- hwctrl(mtd, NAND_CMD_NONE, NAND_NCE | NAND_CTRL_CHANGE);
-
- /*
- * Wait a while for the data to be ready
- */
- while (!this->dev_ready(mtd))
- ;
-
- return 0;
-}
-#endif
-
-static int nand_is_bad_block(struct mtd_info *mtd, int block)
-{
- struct nand_chip *this = mtd->priv;
-
- nand_command(mtd, block, 0, CONFIG_SYS_NAND_BAD_BLOCK_POS, NAND_CMD_READOOB);
-
- /*
- * Read one byte (or two if it's a 16 bit chip).
- */
- if (this->options & NAND_BUSWIDTH_16) {
- if (readw(this->IO_ADDR_R) != 0xffff)
- return 1;
- } else {
- if (readb(this->IO_ADDR_R) != 0xff)
- return 1;
- }
-
- return 0;
-}
-
-#if defined(CONFIG_SYS_NAND_4BIT_HW_ECC_OOBFIRST)
-static int nand_read_page(struct mtd_info *mtd, int block, int page, uchar *dst)
-{
- struct nand_chip *this = mtd->priv;
- u_char ecc_calc[ECCTOTAL];
- u_char ecc_code[ECCTOTAL];
- u_char oob_data[CONFIG_SYS_NAND_OOBSIZE];
- int i;
- int eccsize = CONFIG_SYS_NAND_ECCSIZE;
- int eccbytes = CONFIG_SYS_NAND_ECCBYTES;
- int eccsteps = ECCSTEPS;
- uint8_t *p = dst;
-
- nand_command(mtd, block, page, 0, NAND_CMD_READOOB);
- this->read_buf(mtd, oob_data, CONFIG_SYS_NAND_OOBSIZE);
- nand_command(mtd, block, page, 0, NAND_CMD_READ0);
-
- /* Pick the ECC bytes out of the oob data */
- for (i = 0; i < ECCTOTAL; i++)
- ecc_code[i] = oob_data[nand_ecc_pos[i]];
-
-
- for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
- this->ecc.hwctl(mtd, NAND_ECC_READ);
- this->read_buf(mtd, p, eccsize);
- this->ecc.calculate(mtd, p, &ecc_calc[i]);
- this->ecc.correct(mtd, p, &ecc_code[i], &ecc_calc[i]);
- }
-
- return 0;
-}
-#else
-static int nand_read_page(struct mtd_info *mtd, int block, int page, uchar *dst)
-{
- struct nand_chip *this = mtd->priv;
- u_char ecc_calc[ECCTOTAL];
- u_char ecc_code[ECCTOTAL];
- u_char oob_data[CONFIG_SYS_NAND_OOBSIZE];
- int i;
- int eccsize = CONFIG_SYS_NAND_ECCSIZE;
- int eccbytes = CONFIG_SYS_NAND_ECCBYTES;
- int eccsteps = ECCSTEPS;
- uint8_t *p = dst;
-
- nand_command(mtd, block, page, 0, NAND_CMD_READ0);
-
- for (i = 0; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
- this->ecc.hwctl(mtd, NAND_ECC_READ);
- this->read_buf(mtd, p, eccsize);
- this->ecc.calculate(mtd, p, &ecc_calc[i]);
- }
- this->read_buf(mtd, oob_data, CONFIG_SYS_NAND_OOBSIZE);
-
- /* Pick the ECC bytes out of the oob data */
- for (i = 0; i < ECCTOTAL; i++)
- ecc_code[i] = oob_data[nand_ecc_pos[i]];
-
- eccsteps = ECCSTEPS;
- p = dst;
-
- for (i = 0 ; eccsteps; eccsteps--, i += eccbytes, p += eccsize) {
- /* No chance to do something with the possible error message
- * from correct_data(). We just hope that all possible errors
- * are corrected by this routine.
- */
- this->ecc.correct(mtd, p, &ecc_code[i], &ecc_calc[i]);
- }
-
- return 0;
-}
-#endif /* #if defined(CONFIG_SYS_NAND_4BIT_HW_ECC_OOBFIRST) */
-
-static int nand_load(struct mtd_info *mtd, unsigned int offs,
- unsigned int uboot_size, uchar *dst)
-{
- unsigned int block, lastblock;
- unsigned int page;
-
- /*
- * offs has to be aligned to a page address!
- */
- block = offs / CONFIG_SYS_NAND_BLOCK_SIZE;
- lastblock = (offs + uboot_size - 1) / CONFIG_SYS_NAND_BLOCK_SIZE;
- page = (offs % CONFIG_SYS_NAND_BLOCK_SIZE) / CONFIG_SYS_NAND_PAGE_SIZE;
-
- while (block <= lastblock) {
- if (!nand_is_bad_block(mtd, block)) {
- /*
- * Skip bad blocks
- */
- while (page < CONFIG_SYS_NAND_PAGE_COUNT) {
- nand_read_page(mtd, block, page, dst);
- dst += CONFIG_SYS_NAND_PAGE_SIZE;
- page++;
- }
-
- page = 0;
- } else {
- lastblock++;
- }
-
- block++;
- }
-
- return 0;
-}
-
-/*
- * The main entry for NAND booting. It's necessary that SDRAM is already
- * configured and available since this code loads the main U-Boot image
- * from NAND into SDRAM and starts it from there.
- */
-void nand_boot(void)
-{
- struct nand_chip nand_chip;
- nand_info_t nand_info;
- __attribute__((noreturn)) void (*uboot)(void);
-
- /*
- * Init board specific nand support
- */
- nand_chip.select_chip = NULL;
- nand_info.priv = &nand_chip;
- nand_chip.IO_ADDR_R = nand_chip.IO_ADDR_W = (void __iomem *)CONFIG_SYS_NAND_BASE;
- nand_chip.dev_ready = NULL; /* preset to NULL */
- nand_chip.options = 0;
- board_nand_init(&nand_chip);
-
- if (nand_chip.select_chip)
- nand_chip.select_chip(&nand_info, 0);
-
- /*
- * Load U-Boot image from NAND into RAM
- */
- nand_load(&nand_info, CONFIG_SYS_NAND_U_BOOT_OFFS, CONFIG_SYS_NAND_U_BOOT_SIZE,
- (uchar *)CONFIG_SYS_NAND_U_BOOT_DST);
-
-#ifdef CONFIG_NAND_ENV_DST
- nand_load(&nand_info, CONFIG_ENV_OFFSET, CONFIG_ENV_SIZE,
- (uchar *)CONFIG_NAND_ENV_DST);
-
-#ifdef CONFIG_ENV_OFFSET_REDUND
- nand_load(&nand_info, CONFIG_ENV_OFFSET_REDUND, CONFIG_ENV_SIZE,
- (uchar *)CONFIG_NAND_ENV_DST + CONFIG_ENV_SIZE);
-#endif
-#endif
-
- if (nand_chip.select_chip)
- nand_chip.select_chip(&nand_info, -1);
-
- /*
- * Jump to U-Boot image
- */
- uboot = (void *)CONFIG_SYS_NAND_U_BOOT_START;
- (*uboot)();
-}
projects / karo-tx-uboot.git / blobdiff