Partition names should be partition@<offset> with <offset> being the offset in the master mtd, and not a counting number. Signed-off-by: Sascha Hauer <s.hauer@pengutronix.de>
694 lines
16 KiB
C
694 lines
16 KiB
C
/*
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* (C) Copyright 2005
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* 2N Telekomunikace, a.s. <www.2n.cz>
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* Ladislav Michl <michl@2n.cz>
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*
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* See file CREDITS for list of people who contributed to this
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* project.
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* version 2 as published by the Free Software Foundation.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*/
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#include <common.h>
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#include <linux/mtd/nand.h>
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#include <linux/mtd/mtd.h>
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#include <mtd/ubi-user.h>
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#include <cmdlinepart.h>
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#include <filetype.h>
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#include <init.h>
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#include <xfuncs.h>
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#include <driver.h>
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#include <malloc.h>
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#include <ioctl.h>
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#include <nand.h>
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#include <errno.h>
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#include <of.h>
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#include "mtd.h"
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static LIST_HEAD(mtd_register_hooks);
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int mtd_all_ff(const void *buf, unsigned int len)
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{
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while ((unsigned long)buf & 0x3) {
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if (*(const uint8_t *)buf != 0xff)
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return 0;
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len--;
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if (!len)
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return 1;
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buf++;
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}
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while (len > 0x3) {
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if (*(const uint32_t *)buf != 0xffffffff)
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return 0;
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len -= sizeof(uint32_t);
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if (!len)
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return 1;
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buf += sizeof(uint32_t);
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}
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while (len) {
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if (*(const uint8_t *)buf != 0xff)
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return 0;
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len--;
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buf++;
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}
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return 1;
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}
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static ssize_t mtd_op_read(struct cdev *cdev, void* buf, size_t count,
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loff_t _offset, ulong flags)
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{
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struct mtd_info *mtd = cdev->priv;
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size_t retlen;
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int ret;
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unsigned long offset = _offset;
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dev_dbg(cdev->dev, "read ofs: 0x%08lx count: 0x%08zx\n",
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offset, count);
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ret = mtd_read(mtd, offset, count, &retlen, buf);
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if (ret < 0)
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return ret;
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if (mtd->ecc_strength == 0)
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return retlen; /* device lacks ecc */
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return ret >= mtd->bitflip_threshold ? -EUCLEAN : retlen;
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}
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#define NOTALIGNED(x) (x & (mtd->writesize - 1)) != 0
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#define MTDPGALG(x) ((x) & ~(mtd->writesize - 1))
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#ifdef CONFIG_MTD_WRITE
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static ssize_t mtd_op_write(struct cdev* cdev, const void *buf, size_t _count,
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loff_t _offset, ulong flags)
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{
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struct mtd_info *mtd = cdev->priv;
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size_t retlen;
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int ret;
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ret = mtd_write(mtd, _offset, _count, &retlen, buf);
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return ret ? ret : _count;
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}
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static struct mtd_erase_region_info *mtd_find_erase_region(struct mtd_info *mtd, loff_t offset)
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{
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int i;
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for (i = 0; i < mtd->numeraseregions; i++) {
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struct mtd_erase_region_info *e = &mtd->eraseregions[i];
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if (offset > e->offset + e->erasesize * e->numblocks)
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continue;
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return e;
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}
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return NULL;
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}
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static int mtd_erase_align(struct mtd_info *mtd, size_t *count, loff_t *offset)
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{
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struct mtd_erase_region_info *e;
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loff_t ofs;
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if (mtd->numeraseregions == 0) {
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ofs = *offset & ~(mtd->erasesize - 1);
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*count += (*offset - ofs);
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*count = ALIGN(*count, mtd->erasesize);
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*offset = ofs;
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return 0;
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}
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e = mtd_find_erase_region(mtd, *offset);
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if (!e)
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return -EINVAL;
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ofs = *offset & ~(e->erasesize - 1);
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*count += (*offset - ofs);
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e = mtd_find_erase_region(mtd, *offset + *count);
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if (!e)
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return -EINVAL;
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*count = ALIGN(*count, e->erasesize);
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*offset = ofs;
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return 0;
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}
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static int mtd_op_erase(struct cdev *cdev, size_t count, loff_t offset)
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{
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struct mtd_info *mtd = cdev->priv;
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struct erase_info erase;
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uint32_t addr;
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int ret;
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ret = mtd_erase_align(mtd, &count, &offset);
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if (ret)
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return ret;
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memset(&erase, 0, sizeof(erase));
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erase.mtd = mtd;
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addr = offset;
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if (!mtd->block_isbad) {
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erase.addr = addr;
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erase.len = count;
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return mtd_erase(mtd, &erase);
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}
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erase.len = mtd->erasesize;
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while (count > 0) {
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dev_dbg(cdev->dev, "erase %d %d\n", addr, erase.len);
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if (mtd->allow_erasebad || (mtd->master && mtd->master->allow_erasebad))
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ret = 0;
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else
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ret = mtd_block_isbad(mtd, addr);
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erase.addr = addr;
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if (ret > 0) {
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printf("Skipping bad block at 0x%08x\n", addr);
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} else {
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ret = mtd_erase(mtd, &erase);
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if (ret)
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return ret;
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}
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addr += mtd->erasesize;
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count -= count > mtd->erasesize ? mtd->erasesize : count;
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}
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return 0;
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}
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static int mtd_op_protect(struct cdev *cdev, size_t count, loff_t offset, int prot)
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{
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struct mtd_info *mtd = cdev->priv;
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if (!mtd->unlock || !mtd->lock)
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return -ENOSYS;
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if (prot)
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return mtd_lock(mtd, offset, count);
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else
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return mtd_unlock(mtd, offset, count);
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}
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#endif /* CONFIG_MTD_WRITE */
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int mtd_ioctl(struct cdev *cdev, int request, void *buf)
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{
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int ret = 0;
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struct mtd_info *mtd = cdev->priv;
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struct mtd_info_user *user = buf;
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#if (defined(CONFIG_NAND_ECC_HW) || defined(CONFIG_NAND_ECC_SOFT))
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struct mtd_ecc_stats *ecc = buf;
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#endif
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struct region_info_user *reg = buf;
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#ifdef CONFIG_MTD_WRITE
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struct erase_info_user *ei = buf;
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#endif
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loff_t *offset = buf;
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switch (request) {
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case MEMGETBADBLOCK:
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dev_dbg(cdev->dev, "MEMGETBADBLOCK: 0x%08llx\n", *offset);
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ret = mtd_block_isbad(mtd, *offset);
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break;
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#ifdef CONFIG_MTD_WRITE
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case MEMSETBADBLOCK:
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dev_dbg(cdev->dev, "MEMSETBADBLOCK: 0x%08llx\n", *offset);
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ret = mtd_block_markbad(mtd, *offset);
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break;
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case MEMERASE:
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ret = mtd_op_erase(cdev, ei->length, ei->start + cdev->offset);
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break;
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#endif
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case MEMGETINFO:
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user->type = mtd->type;
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user->flags = mtd->flags;
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user->size = mtd->size;
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user->erasesize = mtd->erasesize;
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user->writesize = mtd->writesize;
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user->oobsize = mtd->oobsize;
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user->subpagesize = mtd->writesize >> mtd->subpage_sft;
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user->mtd = mtd;
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/* The below fields are obsolete */
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user->ecctype = -1;
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user->eccsize = 0;
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break;
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#if (defined(CONFIG_NAND_ECC_HW) || defined(CONFIG_NAND_ECC_SOFT))
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case ECCGETSTATS:
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ecc->corrected = mtd->ecc_stats.corrected;
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ecc->failed = mtd->ecc_stats.failed;
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ecc->badblocks = mtd->ecc_stats.badblocks;
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ecc->bbtblocks = mtd->ecc_stats.bbtblocks;
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break;
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#endif
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case MEMGETREGIONINFO:
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if (cdev->mtd) {
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unsigned long size = cdev->size;
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reg->offset = cdev->offset;
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reg->erasesize = cdev->mtd->erasesize;
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reg->numblocks = size / reg->erasesize;
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reg->regionindex = cdev->mtd->index;
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}
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break;
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default:
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ret = -EINVAL;
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}
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return ret;
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}
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int mtd_lock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
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{
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if (!mtd->lock)
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return -EOPNOTSUPP;
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if (ofs < 0 || ofs > mtd->size || len > mtd->size - ofs)
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return -EINVAL;
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if (!len)
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return 0;
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return mtd->lock(mtd, ofs, len);
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}
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int mtd_unlock(struct mtd_info *mtd, loff_t ofs, uint64_t len)
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{
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if (!mtd->unlock)
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return -EOPNOTSUPP;
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if (ofs < 0 || ofs > mtd->size || len > mtd->size - ofs)
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return -EINVAL;
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if (!len)
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return 0;
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return mtd->unlock(mtd, ofs, len);
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}
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int mtd_block_isbad(struct mtd_info *mtd, loff_t ofs)
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{
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if (!mtd->block_isbad)
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return 0;
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if (ofs < 0 || ofs > mtd->size)
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return -EINVAL;
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return mtd->block_isbad(mtd, ofs);
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}
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int mtd_block_markbad(struct mtd_info *mtd, loff_t ofs)
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{
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int ret;
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if (mtd->block_markbad)
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ret = mtd->block_markbad(mtd, ofs);
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else
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ret = -ENOSYS;
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return ret;
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}
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int mtd_read(struct mtd_info *mtd, loff_t from, size_t len, size_t *retlen,
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u_char *buf)
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{
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int ret_code;
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*retlen = 0;
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/*
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* In the absence of an error, drivers return a non-negative integer
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* representing the maximum number of bitflips that were corrected on
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* any one ecc region (if applicable; zero otherwise).
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*/
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ret_code = mtd->read(mtd, from, len, retlen, buf);
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if (unlikely(ret_code < 0))
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return ret_code;
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if (mtd->ecc_strength == 0)
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return 0; /* device lacks ecc */
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return ret_code >= mtd->bitflip_threshold ? -EUCLEAN : 0;
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}
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int mtd_write(struct mtd_info *mtd, loff_t to, size_t len, size_t *retlen,
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const u_char *buf)
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{
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return mtd->write(mtd, to, len, retlen, buf);
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}
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int mtd_erase(struct mtd_info *mtd, struct erase_info *instr)
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{
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return mtd->erase(mtd, instr);
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}
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int mtd_read_oob(struct mtd_info *mtd, loff_t from, struct mtd_oob_ops *ops)
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{
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int ret_code;
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ops->retlen = ops->oobretlen = 0;
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if (!mtd->read_oob)
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return -EOPNOTSUPP;
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/*
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* In cases where ops->datbuf != NULL, mtd->_read_oob() has semantics
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* similar to mtd->_read(), returning a non-negative integer
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* representing max bitflips. In other cases, mtd->_read_oob() may
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* return -EUCLEAN. In all cases, perform similar logic to mtd_read().
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*/
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ret_code = mtd->read_oob(mtd, from, ops);
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if (unlikely(ret_code < 0))
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return ret_code;
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if (mtd->ecc_strength == 0)
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return 0; /* device lacks ecc */
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return ret_code >= mtd->bitflip_threshold ? -EUCLEAN : 0;
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}
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static struct file_operations mtd_ops = {
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.read = mtd_op_read,
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#ifdef CONFIG_MTD_WRITE
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.write = mtd_op_write,
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.erase = mtd_op_erase,
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.protect = mtd_op_protect,
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#endif
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.ioctl = mtd_ioctl,
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.lseek = dev_lseek_default,
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};
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static int mtd_partition_set(struct device_d *dev, struct param_d *p, const char *val)
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{
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struct mtd_info *mtd = container_of(dev, struct mtd_info, class_dev);
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struct mtd_info *mtdpart, *tmp;
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int ret;
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if (!val)
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return -EINVAL;
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list_for_each_entry_safe(mtdpart, tmp, &mtd->partitions, partitions_entry) {
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ret = mtd_del_partition(mtdpart);
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if (ret)
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return ret;
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}
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return cmdlinepart_do_parse(mtd->cdev.name, val, mtd->size, CMDLINEPART_ADD_DEVNAME);
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}
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static char *print_size(uint64_t s)
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{
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if (!(s & ((1 << 20) - 1)))
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return asprintf("%lldM", s >> 20);
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if (!(s & ((1 << 10) - 1)))
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return asprintf("%lldk", s >> 10);
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return asprintf("0x%lld", s);
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}
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static int print_part(char *buf, int bufsize, struct mtd_info *mtd, uint64_t last_ofs,
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int is_last)
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{
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char *size = print_size(mtd->size);
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char *ofs = print_size(mtd->master_offset);
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int ret;
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if (!size || !ofs) {
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ret = -ENOMEM;
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goto out;
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}
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if (mtd->master_offset == last_ofs)
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ret = snprintf(buf, bufsize, "%s(%s)%s", size,
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mtd->cdev.partname,
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is_last ? "" : ",");
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else
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ret = snprintf(buf, bufsize, "%s@%s(%s)%s", size,
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ofs,
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mtd->cdev.partname,
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is_last ? "" : ",");
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out:
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free(size);
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free(ofs);
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return ret;
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}
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static int print_parts(char *buf, int bufsize, struct mtd_info *mtd)
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{
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struct mtd_info *mtdpart;
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uint64_t last_ofs = 0;
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int ret = 0;
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list_for_each_entry(mtdpart, &mtd->partitions, partitions_entry) {
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int now;
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int is_last = list_is_last(&mtdpart->partitions_entry,
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&mtd->partitions);
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now = print_part(buf, bufsize, mtdpart, last_ofs, is_last);
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if (now < 0)
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return now;
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if (buf && bufsize) {
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buf += now;
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bufsize -= now;
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}
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ret += now;
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last_ofs = mtdpart->master_offset + mtdpart->size;
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}
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return ret;
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}
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static const char *mtd_partition_get(struct device_d *dev, struct param_d *p)
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{
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struct mtd_info *mtd = container_of(dev, struct mtd_info, class_dev);
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int len = 0;
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free(p->value);
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len = print_parts(NULL, 0, mtd);
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p->value = xzalloc(len + 1);
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print_parts(p->value, len + 1, mtd);
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return p->value;
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}
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static int mtd_part_compare(struct list_head *a, struct list_head *b)
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{
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struct mtd_info *mtda = container_of(a, struct mtd_info, partitions_entry);
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struct mtd_info *mtdb = container_of(b, struct mtd_info, partitions_entry);
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if (mtda->master_offset > mtdb->master_offset)
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return 1;
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if (mtda->master_offset < mtdb->master_offset)
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return -1;
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return 0;
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}
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static int of_mtd_fixup(struct device_node *root, void *ctx)
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{
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struct mtd_info *mtd = ctx, *partmtd;
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struct device_node *np, *part, *tmp;
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int ret;
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np = of_find_node_by_path_from(root, mtd->of_path);
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if (!np) {
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dev_err(&mtd->class_dev, "Cannot find nodepath %s, cannot fixup\n",
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mtd->of_path);
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return -EINVAL;
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}
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for_each_child_of_node_safe(np, tmp, part) {
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if (of_get_property(part, "compatible", NULL))
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continue;
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of_delete_node(part);
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}
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list_for_each_entry(partmtd, &mtd->partitions, partitions_entry) {
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int na, ns, len = 0;
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char *name = asprintf("partition@%0llx", partmtd->master_offset);
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void *p;
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u8 tmp[16 * 16]; /* Up to 64-bit address + 64-bit size */
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if (!name)
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return -ENOMEM;
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|
|
|
part = of_new_node(np, name);
|
|
free(name);
|
|
if (!part)
|
|
return -ENOMEM;
|
|
|
|
p = of_new_property(part, "label", partmtd->cdev.partname,
|
|
strlen(partmtd->cdev.partname) + 1);
|
|
if (!p)
|
|
return -ENOMEM;
|
|
|
|
na = of_n_addr_cells(part);
|
|
ns = of_n_size_cells(part);
|
|
|
|
of_write_number(tmp + len, partmtd->master_offset, na);
|
|
len += na * 4;
|
|
of_write_number(tmp + len, partmtd->size, ns);
|
|
len += ns * 4;
|
|
|
|
ret = of_set_property(part, "reg", tmp, len, 1);
|
|
if (ret)
|
|
return ret;
|
|
|
|
if (partmtd->cdev.flags & DEVFS_PARTITION_READONLY) {
|
|
ret = of_set_property(part, "read-only", NULL, 0, 1);
|
|
if (ret)
|
|
return ret;
|
|
}
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
static int mtd_detect(struct device_d *dev)
|
|
{
|
|
struct mtd_info *mtd = container_of(dev, struct mtd_info, class_dev);
|
|
int bufsize = 512;
|
|
void *buf;
|
|
int ret;
|
|
enum filetype filetype;
|
|
size_t retlen;
|
|
|
|
/*
|
|
* Do not try to attach an UBI device if this device has partitions
|
|
* as it's not a good idea to attach UBI on a raw device when the
|
|
* real UBI only spans the first partition.
|
|
*/
|
|
if (!list_empty(&mtd->partitions))
|
|
return -EBUSY;
|
|
|
|
buf = xmalloc(bufsize);
|
|
|
|
ret = mtd_read(mtd, 0, bufsize, &retlen, buf);
|
|
if (ret)
|
|
goto out;
|
|
|
|
filetype = file_detect_type(buf, bufsize);
|
|
if (filetype == filetype_ubi) {
|
|
ret = ubi_attach_mtd_dev(mtd, UBI_DEV_NUM_AUTO, 0, 20);
|
|
if (ret == -EEXIST)
|
|
ret = 0;
|
|
}
|
|
out:
|
|
free(buf);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int add_mtd_device(struct mtd_info *mtd, const char *devname, int device_id)
|
|
{
|
|
struct mtddev_hook *hook;
|
|
int ret;
|
|
|
|
if (!devname)
|
|
devname = "mtd";
|
|
strcpy(mtd->class_dev.name, devname);
|
|
mtd->class_dev.id = device_id;
|
|
if (mtd->parent)
|
|
mtd->class_dev.parent = mtd->parent;
|
|
|
|
if (IS_ENABLED(CONFIG_MTD_UBI))
|
|
mtd->class_dev.detect = mtd_detect;
|
|
|
|
ret = register_device(&mtd->class_dev);
|
|
if (ret)
|
|
return ret;
|
|
|
|
mtd->cdev.ops = &mtd_ops;
|
|
mtd->cdev.size = mtd->size;
|
|
if (device_id == DEVICE_ID_SINGLE)
|
|
mtd->cdev.name = xstrdup(devname);
|
|
else
|
|
mtd->cdev.name = asprintf("%s%d", devname, mtd->class_dev.id);
|
|
|
|
INIT_LIST_HEAD(&mtd->partitions);
|
|
|
|
mtd->cdev.priv = mtd;
|
|
mtd->cdev.dev = &mtd->class_dev;
|
|
mtd->cdev.mtd = mtd;
|
|
|
|
if (IS_ENABLED(CONFIG_PARAMETER)) {
|
|
dev_add_param_llint_ro(&mtd->class_dev, "size", mtd->size, "%llu");
|
|
dev_add_param_int_ro(&mtd->class_dev, "erasesize", mtd->erasesize, "%u");
|
|
dev_add_param_int_ro(&mtd->class_dev, "writesize", mtd->writesize, "%u");
|
|
dev_add_param_int_ro(&mtd->class_dev, "oobsize", mtd->oobsize, "%u");
|
|
}
|
|
|
|
ret = devfs_create(&mtd->cdev);
|
|
if (ret)
|
|
goto err;
|
|
|
|
if (mtd->master && !(mtd->cdev.flags & DEVFS_PARTITION_FIXED)) {
|
|
struct mtd_info *mtdpart;
|
|
|
|
list_for_each_entry(mtdpart, &mtd->master->partitions, partitions_entry) {
|
|
if (mtdpart->master_offset + mtdpart->size <= mtd->master_offset)
|
|
continue;
|
|
if (mtd->master_offset + mtd->size <= mtdpart->master_offset)
|
|
continue;
|
|
dev_err(&mtd->class_dev, "New partition %s conflicts with %s\n",
|
|
mtd->name, mtdpart->name);
|
|
goto err1;
|
|
}
|
|
|
|
list_add_sort(&mtd->partitions_entry, &mtd->master->partitions, mtd_part_compare);
|
|
}
|
|
|
|
if (mtd_can_have_bb(mtd))
|
|
mtd->cdev_bb = mtd_add_bb(mtd, NULL);
|
|
|
|
if (mtd->parent && !mtd->master) {
|
|
dev_add_param(&mtd->class_dev, "partitions", mtd_partition_set, mtd_partition_get, 0);
|
|
of_parse_partitions(&mtd->cdev, mtd->parent->device_node);
|
|
if (IS_ENABLED(CONFIG_OFDEVICE) && mtd->parent->device_node) {
|
|
mtd->of_path = xstrdup(mtd->parent->device_node->full_name);
|
|
of_register_fixup(of_mtd_fixup, mtd);
|
|
}
|
|
}
|
|
|
|
list_for_each_entry(hook, &mtd_register_hooks, hook)
|
|
if (hook->add_mtd_device)
|
|
hook->add_mtd_device(mtd, devname, &hook->priv);
|
|
|
|
return 0;
|
|
err1:
|
|
devfs_remove(&mtd->cdev);
|
|
err:
|
|
free(mtd->cdev.name);
|
|
unregister_device(&mtd->class_dev);
|
|
|
|
return ret;
|
|
}
|
|
|
|
int del_mtd_device (struct mtd_info *mtd)
|
|
{
|
|
struct mtddev_hook *hook;
|
|
|
|
list_for_each_entry(hook, &mtd_register_hooks, hook)
|
|
if (hook->del_mtd_device)
|
|
hook->del_mtd_device(mtd, &hook->priv);
|
|
|
|
devfs_remove(&mtd->cdev);
|
|
if (mtd->cdev_bb)
|
|
mtd_del_bb(mtd);
|
|
unregister_device(&mtd->class_dev);
|
|
free(mtd->param_size.value);
|
|
free(mtd->cdev.name);
|
|
if (mtd->master)
|
|
list_del(&mtd->partitions_entry);
|
|
|
|
return 0;
|
|
}
|
|
|
|
void mtdcore_add_hook(struct mtddev_hook *hook)
|
|
{
|
|
list_add(&hook->hook, &mtd_register_hooks);
|
|
}
|