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- // SPDX-License-Identifier: GPL-2.0+
- /*
- * Copyright (C) 2014 Gateworks Corporation
- * Author: Tim Harvey <tharvey@gateworks.com>
- */
- #include <common.h>
- #include <nand.h>
- #include <malloc.h>
- #include "mxs_nand.h"
- static struct mtd_info *mtd;
- static struct nand_chip nand_chip;
- static void mxs_nand_command(struct mtd_info *mtd, unsigned int command,
- int column, int page_addr)
- {
- register struct nand_chip *chip = mtd_to_nand(mtd);
- u32 timeo, time_start;
- /* write out the command to the device */
- chip->cmd_ctrl(mtd, command, NAND_CLE);
- /* Serially input address */
- if (column != -1) {
- chip->cmd_ctrl(mtd, column, NAND_ALE);
- chip->cmd_ctrl(mtd, column >> 8, NAND_ALE);
- }
- if (page_addr != -1) {
- chip->cmd_ctrl(mtd, page_addr, NAND_ALE);
- chip->cmd_ctrl(mtd, page_addr >> 8, NAND_ALE);
- /* One more address cycle for devices > 128MiB */
- if (chip->chipsize > (128 << 20))
- chip->cmd_ctrl(mtd, page_addr >> 16, NAND_ALE);
- }
- chip->cmd_ctrl(mtd, NAND_CMD_NONE, 0);
- if (command == NAND_CMD_READ0) {
- chip->cmd_ctrl(mtd, NAND_CMD_READSTART, NAND_CLE);
- chip->cmd_ctrl(mtd, NAND_CMD_NONE, 0);
- }
- /* wait for nand ready */
- ndelay(100);
- timeo = (CONFIG_SYS_HZ * 20) / 1000;
- time_start = get_timer(0);
- while (get_timer(time_start) < timeo) {
- if (chip->dev_ready(mtd))
- break;
- }
- }
- #if defined (CONFIG_SPL_NAND_IDENT)
- /* Trying to detect the NAND flash using ONFi, JEDEC, and (extended) IDs */
- static int mxs_flash_full_ident(struct mtd_info *mtd)
- {
- int nand_maf_id, nand_dev_id;
- struct nand_chip *chip = mtd_to_nand(mtd);
- struct nand_flash_dev *type;
- type = nand_get_flash_type(mtd, chip, &nand_maf_id, &nand_dev_id, NULL);
- if (IS_ERR(type)) {
- chip->select_chip(mtd, -1);
- return PTR_ERR(type);
- }
- return 0;
- }
- #else
- /* Trying to detect the NAND flash using ONFi only */
- static int mxs_flash_onfi_ident(struct mtd_info *mtd)
- {
- register struct nand_chip *chip = mtd_to_nand(mtd);
- int i;
- u8 mfg_id, dev_id;
- u8 id_data[8];
- struct nand_onfi_params *p = &chip->onfi_params;
- /* Reset the chip */
- chip->cmdfunc(mtd, NAND_CMD_RESET, -1, -1);
- /* Send the command for reading device ID */
- chip->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1);
- /* Read manufacturer and device IDs */
- mfg_id = chip->read_byte(mtd);
- dev_id = chip->read_byte(mtd);
- /* Try again to make sure */
- chip->cmdfunc(mtd, NAND_CMD_READID, 0x00, -1);
- for (i = 0; i < 8; i++)
- id_data[i] = chip->read_byte(mtd);
- if (id_data[0] != mfg_id || id_data[1] != dev_id) {
- printf("second ID read did not match");
- return -1;
- }
- debug("0x%02x:0x%02x ", mfg_id, dev_id);
- /* read ONFI */
- chip->onfi_version = 0;
- chip->cmdfunc(mtd, NAND_CMD_READID, 0x20, -1);
- if (chip->read_byte(mtd) != 'O' || chip->read_byte(mtd) != 'N' ||
- chip->read_byte(mtd) != 'F' || chip->read_byte(mtd) != 'I') {
- return -2;
- }
- /* we have ONFI, probe it */
- chip->cmdfunc(mtd, NAND_CMD_PARAM, 0, -1);
- chip->read_buf(mtd, (uint8_t *)p, sizeof(*p));
- mtd->name = p->model;
- mtd->writesize = le32_to_cpu(p->byte_per_page);
- mtd->erasesize = le32_to_cpu(p->pages_per_block) * mtd->writesize;
- mtd->oobsize = le16_to_cpu(p->spare_bytes_per_page);
- chip->chipsize = le32_to_cpu(p->blocks_per_lun);
- chip->chipsize *= (uint64_t)mtd->erasesize * p->lun_count;
- /* Calculate the address shift from the page size */
- chip->page_shift = ffs(mtd->writesize) - 1;
- chip->phys_erase_shift = ffs(mtd->erasesize) - 1;
- /* Convert chipsize to number of pages per chip -1 */
- chip->pagemask = (chip->chipsize >> chip->page_shift) - 1;
- chip->badblockbits = 8;
- debug("erasesize=%d (>>%d)\n", mtd->erasesize, chip->phys_erase_shift);
- debug("writesize=%d (>>%d)\n", mtd->writesize, chip->page_shift);
- debug("oobsize=%d\n", mtd->oobsize);
- debug("chipsize=%lld\n", chip->chipsize);
- return 0;
- }
- #endif /* CONFIG_SPL_NAND_IDENT */
- static int mxs_flash_ident(struct mtd_info *mtd)
- {
- int ret;
- #if defined (CONFIG_SPL_NAND_IDENT)
- ret = mxs_flash_full_ident(mtd);
- #else
- ret = mxs_flash_onfi_ident(mtd);
- #endif
- return ret;
- }
- static int mxs_read_page_ecc(struct mtd_info *mtd, void *buf, unsigned int page)
- {
- register struct nand_chip *chip = mtd_to_nand(mtd);
- int ret;
- chip->cmdfunc(mtd, NAND_CMD_READ0, 0x0, page);
- ret = nand_chip.ecc.read_page(mtd, chip, buf, 1, page);
- if (ret < 0) {
- printf("read_page failed %d\n", ret);
- return -1;
- }
- return 0;
- }
- static int is_badblock(struct mtd_info *mtd, loff_t offs, int allowbbt)
- {
- register struct nand_chip *chip = mtd_to_nand(mtd);
- unsigned int block = offs >> chip->phys_erase_shift;
- unsigned int page = offs >> chip->page_shift;
- debug("%s offs=0x%08x block:%d page:%d\n", __func__, (int)offs, block,
- page);
- chip->cmdfunc(mtd, NAND_CMD_READ0, mtd->writesize, page);
- memset(chip->oob_poi, 0, mtd->oobsize);
- chip->read_buf(mtd, chip->oob_poi, mtd->oobsize);
- return chip->oob_poi[0] != 0xff;
- }
- /* setup mtd and nand structs and init mxs_nand driver */
- static int mxs_nand_init(void)
- {
- /* return if already initalized */
- if (nand_chip.numchips)
- return 0;
- /* init mxs nand driver */
- mxs_nand_init_spl(&nand_chip);
- mtd = nand_to_mtd(&nand_chip);
- /* set mtd functions */
- nand_chip.cmdfunc = mxs_nand_command;
- nand_chip.numchips = 1;
- /* identify flash device */
- if (mxs_flash_ident(mtd)) {
- printf("Failed to identify\n");
- return -1;
- }
- /* allocate and initialize buffers */
- nand_chip.buffers = memalign(ARCH_DMA_MINALIGN,
- sizeof(*nand_chip.buffers));
- nand_chip.oob_poi = nand_chip.buffers->databuf + mtd->writesize;
- /* setup flash layout (does not scan as we override that) */
- mtd->size = nand_chip.chipsize;
- nand_chip.scan_bbt(mtd);
- return 0;
- }
- int nand_spl_load_image(uint32_t offs, unsigned int size, void *buf)
- {
- struct nand_chip *chip;
- unsigned int page;
- unsigned int nand_page_per_block;
- unsigned int sz = 0;
- if (mxs_nand_init())
- return -ENODEV;
- chip = mtd_to_nand(mtd);
- page = offs >> chip->page_shift;
- nand_page_per_block = mtd->erasesize / mtd->writesize;
- debug("%s offset:0x%08x len:%d page:%d\n", __func__, offs, size, page);
- size = roundup(size, mtd->writesize);
- while (sz < size) {
- if (mxs_read_page_ecc(mtd, buf, page) < 0)
- return -1;
- sz += mtd->writesize;
- offs += mtd->writesize;
- page++;
- buf += mtd->writesize;
- /*
- * Check if we have crossed a block boundary, and if so
- * check for bad block.
- */
- if (!(page % nand_page_per_block)) {
- /*
- * Yes, new block. See if this block is good. If not,
- * loop until we find a good block.
- */
- while (is_badblock(mtd, offs, 1)) {
- page = page + nand_page_per_block;
- /* Check i we've reached the end of flash. */
- if (page >= mtd->size >> chip->page_shift)
- return -ENOMEM;
- }
- }
- }
- return 0;
- }
- int nand_default_bbt(struct mtd_info *mtd)
- {
- return 0;
- }
- void nand_init(void)
- {
- }
- void nand_deselect(void)
- {
- }
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