From 7bc3312bef4d6f220812500c0de7868fb7625a41 Mon Sep 17 00:00:00 2001 From: Thomas Gleixner Date: Tue, 20 Jun 2006 20:05:05 +0200 Subject: [PATCH] [MTD] NAND: Fix breakage all over the place Following problems are addressed: - wrong status caused early break out of nand_wait() - removed the bogus status check in nand_wait() which is a relict of the abandoned support for interrupted erase. - status check moved to the correct place in read_oob - oob support for syndrom based ecc with strange layouts - use given offset in the AUTOOOB based oob operations Partially based on a patch from Vitaly Vool Thanks to Savin Zlobec for tracking down the status problem. Signed-off-by: Thomas Gleixner --- drivers/mtd/mtdchar.c | 8 +- drivers/mtd/nand/diskonchip.c | 2 +- drivers/mtd/nand/nand_base.c | 297 ++++++++++++++++++++++++++++++------------ include/linux/mtd/nand.h | 12 +- 4 files changed, 231 insertions(+), 88 deletions(-) diff --git a/drivers/mtd/mtdchar.c b/drivers/mtd/mtdchar.c index 5dd0b8d..aa18d45 100644 --- a/drivers/mtd/mtdchar.c +++ b/drivers/mtd/mtdchar.c @@ -504,12 +504,12 @@ static int mtd_ioctl(struct inode *inode, struct file *file, return ret; ops.len = buf.length; - ops.ooblen = mtd->oobsize; + ops.ooblen = buf.length; ops.ooboffs = buf.start & (mtd->oobsize - 1); ops.datbuf = NULL; ops.mode = MTD_OOB_PLACE; - if (ops.ooboffs && ops.len > (ops.ooblen - ops.ooboffs)) + if (ops.ooboffs && ops.len > (mtd->oobsize - ops.ooboffs)) return -EINVAL; ops.oobbuf = kmalloc(buf.length, GFP_KERNEL); @@ -553,12 +553,12 @@ static int mtd_ioctl(struct inode *inode, struct file *file, return ret; ops.len = buf.length; - ops.ooblen = mtd->oobsize; + ops.ooblen = buf.length; ops.ooboffs = buf.start & (mtd->oobsize - 1); ops.datbuf = NULL; ops.mode = MTD_OOB_PLACE; - if (ops.ooboffs && ops.len > (ops.ooblen - ops.ooboffs)) + if (ops.ooboffs && ops.len > (mtd->oobsize - ops.ooboffs)) return -EINVAL; ops.oobbuf = kmalloc(buf.length, GFP_KERNEL); diff --git a/drivers/mtd/nand/diskonchip.c b/drivers/mtd/nand/diskonchip.c index 463e12c..6107f53 100644 --- a/drivers/mtd/nand/diskonchip.c +++ b/drivers/mtd/nand/diskonchip.c @@ -464,7 +464,7 @@ static void __init doc2000_count_chips(struct mtd_info *mtd) printk(KERN_DEBUG "Detected %d chips per floor.\n", i); } -static int doc200x_wait(struct mtd_info *mtd, struct nand_chip *this, int state) +static int doc200x_wait(struct mtd_info *mtd, struct nand_chip *this) { struct doc_priv *doc = this->priv; diff --git a/drivers/mtd/nand/nand_base.c b/drivers/mtd/nand/nand_base.c index e74678e..27083ed 100644 --- a/drivers/mtd/nand/nand_base.c +++ b/drivers/mtd/nand/nand_base.c @@ -501,7 +501,6 @@ static void nand_command(struct mtd_info *mtd, unsigned int command, case NAND_CMD_ERASE2: case NAND_CMD_SEQIN: case NAND_CMD_STATUS: - chip->cmd_ctrl(mtd, NAND_CMD_NONE, NAND_NCE); return; case NAND_CMD_RESET: @@ -595,6 +594,7 @@ static void nand_command_lp(struct mtd_info *mtd, unsigned int command, case NAND_CMD_ERASE1: case NAND_CMD_ERASE2: case NAND_CMD_SEQIN: + case NAND_CMD_RNDIN: case NAND_CMD_STATUS: case NAND_CMD_DEPLETE1: return; @@ -621,6 +621,14 @@ static void nand_command_lp(struct mtd_info *mtd, unsigned int command, while (!(chip->read_byte(mtd) & NAND_STATUS_READY)) ; return; + case NAND_CMD_RNDOUT: + /* No ready / busy check necessary */ + chip->cmd_ctrl(mtd, NAND_CMD_RNDOUTSTART, + NAND_NCE | NAND_CLE | NAND_CTRL_CHANGE); + chip->cmd_ctrl(mtd, NAND_CMD_NONE, + NAND_NCE | NAND_CTRL_CHANGE); + return; + case NAND_CMD_READ0: chip->cmd_ctrl(mtd, NAND_CMD_READSTART, NAND_NCE | NAND_CLE | NAND_CTRL_CHANGE); @@ -689,18 +697,17 @@ nand_get_device(struct nand_chip *chip, struct mtd_info *mtd, int new_state) * nand_wait - [DEFAULT] wait until the command is done * @mtd: MTD device structure * @this: NAND chip structure - * @state: state to select the max. timeout value * * Wait for command done. This applies to erase and program only * Erase can take up to 400ms and program up to 20ms according to * general NAND and SmartMedia specs * */ -static int nand_wait(struct mtd_info *mtd, struct nand_chip *chip, int state) +static int nand_wait(struct mtd_info *mtd, struct nand_chip *chip) { unsigned long timeo = jiffies; - int status; + int status, state = chip->state; if (state == FL_ERASING) timeo += (HZ * 400) / 1000; @@ -719,10 +726,6 @@ static int nand_wait(struct mtd_info *mtd, struct nand_chip *chip, int state) chip->cmdfunc(mtd, NAND_CMD_STATUS, -1, -1); while (time_before(jiffies, timeo)) { - /* Check, if we were interrupted */ - if (chip->state != state) - return 0; - if (chip->dev_ready) { if (chip->dev_ready(mtd)) break; @@ -909,12 +912,25 @@ static uint8_t *nand_transfer_oob(struct nand_chip *chip, uint8_t *oob, case MTD_OOB_AUTO: { struct nand_oobfree *free = chip->ecc.layout->oobfree; - size_t bytes; + uint32_t boffs = 0, roffs = ops->ooboffs; + size_t bytes = 0; for(; free->length && len; free++, len -= bytes) { - bytes = min_t(size_t, len, free->length); - - memcpy(oob, chip->oob_poi + free->offset, bytes); + /* Read request not from offset 0 ? */ + if (unlikely(roffs)) { + if (roffs >= free->length) { + roffs -= free->length; + continue; + } + boffs = free->offset + roffs; + bytes = min_t(size_t, len, + (free->length - roffs)); + roffs = 0; + } else { + bytes = min_t(size_t, len, free->length); + boffs = free->offset; + } + memcpy(oob, chip->oob_poi + boffs, bytes); oob += bytes; } return oob; @@ -1084,6 +1100,145 @@ static int nand_read(struct mtd_info *mtd, loff_t from, size_t len, } /** + * nand_read_oob_std - [REPLACABLE] the most common OOB data read function + * @mtd: mtd info structure + * @chip: nand chip info structure + * @page: page number to read + * @sndcmd: flag whether to issue read command or not + */ +static int nand_read_oob_std(struct mtd_info *mtd, struct nand_chip *chip, + int page, int sndcmd) +{ + if (sndcmd) { + chip->cmdfunc(mtd, NAND_CMD_READOOB, 0, page); + sndcmd = 0; + } + chip->read_buf(mtd, chip->oob_poi, mtd->oobsize); + return sndcmd; +} + +/** + * nand_read_oob_syndrome - [REPLACABLE] OOB data read function for HW ECC + * with syndromes + * @mtd: mtd info structure + * @chip: nand chip info structure + * @page: page number to read + * @sndcmd: flag whether to issue read command or not + */ +static int nand_read_oob_syndrome(struct mtd_info *mtd, struct nand_chip *chip, + int page, int sndcmd) +{ + uint8_t *buf = chip->oob_poi; + int length = mtd->oobsize; + int chunk = chip->ecc.bytes + chip->ecc.prepad + chip->ecc.postpad; + int eccsize = chip->ecc.size; + uint8_t *bufpoi = buf; + int i, toread, sndrnd = 0, pos; + + chip->cmdfunc(mtd, NAND_CMD_READ0, chip->ecc.size, page); + for (i = 0; i < chip->ecc.steps; i++) { + if (sndrnd) { + pos = eccsize + i * (eccsize + chunk); + if (mtd->writesize > 512) + chip->cmdfunc(mtd, NAND_CMD_RNDOUT, pos, -1); + else + chip->cmdfunc(mtd, NAND_CMD_READ0, pos, page); + } else + sndrnd = 1; + toread = min_t(int, length, chunk); + chip->read_buf(mtd, bufpoi, toread); + bufpoi += toread; + length -= toread; + } + if (length > 0) + chip->read_buf(mtd, bufpoi, length); + + return 1; +} + +/** + * nand_write_oob_std - [REPLACABLE] the most common OOB data write function + * @mtd: mtd info structure + * @chip: nand chip info structure + * @page: page number to write + */ +static int nand_write_oob_std(struct mtd_info *mtd, struct nand_chip *chip, + int page) +{ + int status = 0; + const uint8_t *buf = chip->oob_poi; + int length = mtd->oobsize; + + chip->cmdfunc(mtd, NAND_CMD_SEQIN, mtd->writesize, page); + chip->write_buf(mtd, buf, length); + /* Send command to program the OOB data */ + chip->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1); + + status = chip->waitfunc(mtd, chip); + + return status; +} + +/** + * nand_write_oob_syndrome - [REPLACABLE] OOB data write function for HW ECC + * with syndrome - only for large page flash ! + * @mtd: mtd info structure + * @chip: nand chip info structure + * @page: page number to write + */ +static int nand_write_oob_syndrome(struct mtd_info *mtd, + struct nand_chip *chip, int page) +{ + int chunk = chip->ecc.bytes + chip->ecc.prepad + chip->ecc.postpad; + int eccsize = chip->ecc.size, length = mtd->oobsize; + int i, len, pos, status = 0, sndcmd = 0, steps = chip->ecc.steps; + const uint8_t *bufpoi = chip->oob_poi; + + /* + * data-ecc-data-ecc ... ecc-oob + * or + * data-pad-ecc-pad-data-pad .... ecc-pad-oob + */ + if (!chip->ecc.prepad && !chip->ecc.postpad) { + pos = steps * (eccsize + chunk); + steps = 0; + } else + pos = eccsize + chunk; + + chip->cmdfunc(mtd, NAND_CMD_SEQIN, pos, page); + for (i = 0; i < steps; i++) { + if (sndcmd) { + if (mtd->writesize <= 512) { + uint32_t fill = 0xFFFFFFFF; + + len = eccsize; + while (len > 0) { + int num = min_t(int, len, 4); + chip->write_buf(mtd, (uint8_t *)&fill, + num); + len -= num; + } + } else { + pos = eccsize + i * (eccsize + chunk); + chip->cmdfunc(mtd, NAND_CMD_RNDIN, pos, -1); + } + } else + sndcmd = 1; + len = min_t(int, length, chunk); + chip->write_buf(mtd, bufpoi, len); + bufpoi += len; + length -= len; + } + if (length > 0) + chip->write_buf(mtd, bufpoi, length); + + chip->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1); + status = chip->waitfunc(mtd, chip); + + return status & NAND_STATUS_FAIL ? -EIO : 0; +} + +/** * nand_do_read_oob - [Intern] NAND read out-of-band * @mtd: MTD device structure * @from: offset to read from @@ -1094,11 +1249,11 @@ static int nand_read(struct mtd_info *mtd, loff_t from, size_t len, static int nand_do_read_oob(struct mtd_info *mtd, loff_t from, struct mtd_oob_ops *ops) { - int col, page, realpage, chipnr, sndcmd = 1; + int page, realpage, chipnr, sndcmd = 1; struct nand_chip *chip = mtd->priv; int blkcheck = (1 << (chip->phys_erase_shift - chip->page_shift)) - 1; - int direct, bytes, readlen = ops->len; - uint8_t *bufpoi, *buf = ops->oobbuf; + int readlen = ops->len; + uint8_t *buf = ops->oobbuf; DEBUG(MTD_DEBUG_LEVEL3, "nand_read_oob: from = 0x%08Lx, len = %i\n", (unsigned long long)from, readlen); @@ -1110,29 +1265,11 @@ static int nand_do_read_oob(struct mtd_info *mtd, loff_t from, realpage = (int)(from >> chip->page_shift); page = realpage & chip->pagemask; - if (ops->mode != MTD_OOB_AUTO) { - col = ops->ooboffs; - direct = 1; - } else { - col = 0; - direct = 0; - } + chip->oob_poi = chip->buffers.oobrbuf; while(1) { - bytes = direct ? ops->ooblen : mtd->oobsize; - bufpoi = direct ? buf : chip->buffers.oobrbuf; - - if (likely(sndcmd)) { - chip->cmdfunc(mtd, NAND_CMD_READOOB, col, page); - sndcmd = 0; - } - - chip->read_buf(mtd, bufpoi, bytes); - - if (unlikely(!direct)) - buf = nand_transfer_oob(chip, buf, ops); - else - buf += ops->ooblen; + sndcmd = chip->ecc.read_oob(mtd, chip, page, sndcmd); + buf = nand_transfer_oob(chip, buf, ops); readlen -= ops->ooblen; if (!readlen) @@ -1365,7 +1502,7 @@ static int nand_write_page(struct mtd_info *mtd, struct nand_chip *chip, if (!cached || !(chip->options & NAND_CACHEPRG)) { chip->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1); - status = chip->waitfunc(mtd, chip, FL_WRITING); + status = chip->waitfunc(mtd, chip); /* * See if operation failed and additional status checks are * available @@ -1378,7 +1515,7 @@ static int nand_write_page(struct mtd_info *mtd, struct nand_chip *chip, return -EIO; } else { chip->cmdfunc(mtd, NAND_CMD_CACHEDPROG, -1, -1); - status = chip->waitfunc(mtd, chip, FL_WRITING); + status = chip->waitfunc(mtd, chip); } #ifdef CONFIG_MTD_NAND_VERIFY_WRITE @@ -1411,11 +1548,25 @@ static uint8_t *nand_fill_oob(struct nand_chip *chip, uint8_t *oob, case MTD_OOB_AUTO: { struct nand_oobfree *free = chip->ecc.layout->oobfree; - size_t bytes; + uint32_t boffs = 0, woffs = ops->ooboffs; + size_t bytes = 0; for(; free->length && len; free++, len -= bytes) { - bytes = min_t(size_t, len, free->length); - memcpy(chip->oob_poi + free->offset, oob, bytes); + /* Write request not from offset 0 ? */ + if (unlikely(woffs)) { + if (woffs >= free->length) { + woffs -= free->length; + continue; + } + boffs = free->offset + woffs; + bytes = min_t(size_t, len, + (free->length - woffs)); + woffs = 0; + } else { + bytes = min_t(size_t, len, free->length); + boffs = free->offset; + } + memcpy(chip->oob_poi + woffs, oob, bytes); oob += bytes; } return oob; @@ -1532,7 +1683,7 @@ static int nand_write(struct mtd_info *mtd, loff_t to, size_t len, if (!len) return 0; - nand_get_device(chip, mtd, FL_READING); + nand_get_device(chip, mtd, FL_WRITING); chip->ops.len = len; chip->ops.datbuf = (uint8_t *)buf; @@ -1592,48 +1743,18 @@ static int nand_do_write_oob(struct mtd_info *mtd, loff_t to, if (page == chip->pagebuf) chip->pagebuf = -1; - if (ops->mode == MTD_OOB_AUTO || NAND_MUST_PAD(chip)) { - chip->oob_poi = chip->buffers.oobwbuf; - memset(chip->oob_poi, 0xff, mtd->oobsize); - nand_fill_oob(chip, ops->oobbuf, ops); - chip->cmdfunc(mtd, NAND_CMD_SEQIN, mtd->writesize, - page & chip->pagemask); - chip->write_buf(mtd, chip->oob_poi, mtd->oobsize); - memset(chip->oob_poi, 0xff, mtd->oobsize); - } else { - chip->cmdfunc(mtd, NAND_CMD_SEQIN, - mtd->writesize + ops->ooboffs, - page & chip->pagemask); - chip->write_buf(mtd, ops->oobbuf, ops->len); - } - - /* Send command to program the OOB data */ - chip->cmdfunc(mtd, NAND_CMD_PAGEPROG, -1, -1); + chip->oob_poi = chip->buffers.oobwbuf; + memset(chip->oob_poi, 0xff, mtd->oobsize); + nand_fill_oob(chip, ops->oobbuf, ops); + status = chip->ecc.write_oob(mtd, chip, page & chip->pagemask); + memset(chip->oob_poi, 0xff, mtd->oobsize); - status = chip->waitfunc(mtd, chip, FL_WRITING); + if (status) + return status; - /* See if device thinks it succeeded */ - if (status & NAND_STATUS_FAIL) { - DEBUG(MTD_DEBUG_LEVEL0, "nand_write_oob: " - "Failed write, page 0x%08x\n", page); - return -EIO; - } ops->retlen = ops->len; -#ifdef CONFIG_MTD_NAND_VERIFY_WRITE - if (ops->mode != MTD_OOB_AUTO) { - /* Send command to read back the data */ - chip->cmdfunc(mtd, NAND_CMD_READOOB, ops->ooboffs, - page & chip->pagemask); - - if (chip->verify_buf(mtd, ops->oobbuf, ops->len)) { - DEBUG(MTD_DEBUG_LEVEL0, "nand_write_oob: " - "Failed write verify, page 0x%08x\n", page); - return -EIO; - } - } -#endif - return 0; + return 0; } /** @@ -1659,7 +1780,7 @@ static int nand_write_oob(struct mtd_info *mtd, loff_t to, return -EINVAL; } - nand_get_device(chip, mtd, FL_READING); + nand_get_device(chip, mtd, FL_WRITING); switch(ops->mode) { case MTD_OOB_PLACE: @@ -1833,7 +1954,7 @@ int nand_erase_nand(struct mtd_info *mtd, struct erase_info *instr, chip->erase_cmd(mtd, page & chip->pagemask); - status = chip->waitfunc(mtd, chip, FL_ERASING); + status = chip->waitfunc(mtd, chip); /* * See if operation failed and additional status checks are @@ -2265,6 +2386,10 @@ int nand_scan(struct mtd_info *mtd, int maxchips) chip->ecc.read_page = nand_read_page_hwecc; if (!chip->ecc.write_page) chip->ecc.write_page = nand_write_page_hwecc; + if (!chip->ecc.read_oob) + chip->ecc.read_oob = nand_read_oob_std; + if (!chip->ecc.write_oob) + chip->ecc.write_oob = nand_write_oob_std; case NAND_ECC_HW_SYNDROME: if (!chip->ecc.calculate || !chip->ecc.correct || @@ -2278,6 +2403,10 @@ int nand_scan(struct mtd_info *mtd, int maxchips) chip->ecc.read_page = nand_read_page_syndrome; if (!chip->ecc.write_page) chip->ecc.write_page = nand_write_page_syndrome; + if (!chip->ecc.read_oob) + chip->ecc.read_oob = nand_read_oob_syndrome; + if (!chip->ecc.write_oob) + chip->ecc.write_oob = nand_write_oob_syndrome; if (mtd->writesize >= chip->ecc.size) break; @@ -2291,6 +2420,8 @@ int nand_scan(struct mtd_info *mtd, int maxchips) chip->ecc.correct = nand_correct_data; chip->ecc.read_page = nand_read_page_swecc; chip->ecc.write_page = nand_write_page_swecc; + chip->ecc.read_oob = nand_read_oob_std; + chip->ecc.write_oob = nand_write_oob_std; chip->ecc.size = 256; chip->ecc.bytes = 3; break; @@ -2300,6 +2431,8 @@ int nand_scan(struct mtd_info *mtd, int maxchips) "This is not recommended !!\n"); chip->ecc.read_page = nand_read_page_raw; chip->ecc.write_page = nand_write_page_raw; + chip->ecc.read_oob = nand_read_oob_std; + chip->ecc.write_oob = nand_write_oob_std; chip->ecc.size = mtd->writesize; chip->ecc.bytes = 0; break; diff --git a/include/linux/mtd/nand.h b/include/linux/mtd/nand.h index bf2ce68..a30969e 100644 --- a/include/linux/mtd/nand.h +++ b/include/linux/mtd/nand.h @@ -63,18 +63,21 @@ extern void nand_release (struct mtd_info *mtd); */ #define NAND_CMD_READ0 0 #define NAND_CMD_READ1 1 +#define NAND_CMD_RNDOUT 5 #define NAND_CMD_PAGEPROG 0x10 #define NAND_CMD_READOOB 0x50 #define NAND_CMD_ERASE1 0x60 #define NAND_CMD_STATUS 0x70 #define NAND_CMD_STATUS_MULTI 0x71 #define NAND_CMD_SEQIN 0x80 +#define NAND_CMD_RNDIN 0x85 #define NAND_CMD_READID 0x90 #define NAND_CMD_ERASE2 0xd0 #define NAND_CMD_RESET 0xff /* Extended commands for large page devices */ #define NAND_CMD_READSTART 0x30 +#define NAND_CMD_RNDOUTSTART 0xE0 #define NAND_CMD_CACHEDPROG 0x15 /* Extended commands for AG-AND device */ @@ -250,6 +253,13 @@ struct nand_ecc_ctrl { void (*write_page)(struct mtd_info *mtd, struct nand_chip *chip, const uint8_t *buf); + int (*read_oob)(struct mtd_info *mtd, + struct nand_chip *chip, + int page, + int sndcmd); + int (*write_oob)(struct mtd_info *mtd, + struct nand_chip *chip, + int page); }; /** @@ -339,7 +349,7 @@ struct nand_chip { unsigned int ctrl); int (*dev_ready)(struct mtd_info *mtd); void (*cmdfunc)(struct mtd_info *mtd, unsigned command, int column, int page_addr); - int (*waitfunc)(struct mtd_info *mtd, struct nand_chip *this, int state); + int (*waitfunc)(struct mtd_info *mtd, struct nand_chip *this); void (*erase_cmd)(struct mtd_info *mtd, int page); int (*scan_bbt)(struct mtd_info *mtd); int (*errstat)(struct mtd_info *mtd, struct nand_chip *this, int state, int status, int page); -- 2.7.4